The Journals of Susanna Moodie Essay Example for Free

The Journals of Susanna Moodie EssayOne of the finest collections of poetry known is The Journals of Susanna Moodie, reiterating several poems contoured to environmental factors. Most of the poems ar interconnected and weaves a cumulative effect on the reader. Of course, the cohesiveness comes from one persona, which is Susanna Moodie. Significantly, this book utters a womans growth and reading into another set down where light, darkness, trees, and fire form an important story in Moodies life. For instance is Moodies transformation in a foreign land, translated by light protruding into darkness. Sensibility on Moodies part will enhance the captivity of making such values on the environmental influences during and aft(prenominal) her migration (Bilan, 2007). In this book, Atwood emphasizes the lack of connection a person has with a specific land. The light specified in the character of Moodie derives an inner margin between the land and the protagonist. The first of the thre e journals conveys the initialized entrance of Moodie unto a foreign space. It is described that Moodie sees herself as a light shedding to rocks. It seems that she already knew herself as a foreign character.Seen in this book, is the addressed change through acceptance and eventual exploration of greater self. Susanna Moodie is the protagonist, where she lives in the period of the 19th century, as an English immigrant to Upper Canada. This book is collected of eighteen poems under three journals. The first journal entails Moodies journey across the Atlantic and up the St. Lawrence where her departure becomes a difficult undertaking. Her migration has caused several deaths among her children. future(a) this event is her conserves work as sheriff in Belleville.In the second journal, Mrs. Moodie experiences the haunting of the difficulties she had known in her past, which eventually links to what she has become in the third journal, a haunting ghost (Hammill, 2003). The Planters Th is poem sees how their adaptation comes in the unknown land. In the first stanza saying, They move between the jagged edge Of the woodwind instrument and the jagged river On a stumpy patch of cleared land. (Atwood 16) Clearly, the stanza reiterates the difficulty of migration. Somehow, there is a description of their origin, jagged meaning diverse or interchanging life.On the next verse, stumpy patch of cleared land, the characterization of the foreign land looked civilized to her or quiet. This description may also mean silence, where there is no one to cling to because of adapting to a new culture. The next stanza focuses on her husbands and other neighbors status on their quest. Identified by describing how they foster their imminent work in the fields, she describes their hard adjustment through exploration uttering, my husband, a neighbor, and another man Weeding the few rows Of string beans and dusty potatoes They bend, roll the sunLights up their faces and hands, candles F lickering in the wind against the (Atwood 16) It seems as though their work is very hard. Mrs. Moodie knows that their migration costs a lot than it should and the primary factor beaming is their culture. She also sees that their experience is similar to what other persons like them endure. The sun emphasized are the superiors, she sees her husband and the other who work as only candles, flickering or unsure of what they are doing. In addition, the instability portrayed may come from the sense of viewing their upholding traditions or what they are used to.Connected to this proposition is even the diffidence they feel on a foreign land. As said in the following, unbright earth. I see them I know None of them believe they are here. They deny the ground they stand on. (Atwood 16) Their distrust dictates their actions. Moodie knows the un beautiful fact of their migration. Hence, the acceptance should be obscure rather than clarified. In a sense, the viewed party is undermined not b y the consequences but of experiences they reach. She accepts yet another hurtful fact of their stay in that cleared land, as she utters of their future troubled but coping, to the unknown world.pretend the dogshit is future. And they are right. If they let go Of that illusion solid to them as a shovel, (Atwood 17) Uttering these words would mean of the unpleasant pursuit dictated by their present status. lubricating oil would mean the strange, unacceptable, and unworthy but still, they have to and need to approve of it as part of their lives. She accepts it, spoiled and impaired. She acknowledges that if they try to accept that fact, stated as solid to them as a shovel, they are doomed. Finally, she identifies of the unknown world vehemently depraved of freedom, stating,open their eyes for a moment To these trees, to this particular sun They would be surrounded, stormed, and broken In upon by branches, roots, tendrils, the dark side of light As I am. (Atwood 17). Mrs. Moodies kn ow of her position. She knows that similarly, other people superior to them determine her fate. Her understanding of that freedom, when persevered to the highest will result to a much bigger problem. She describes it by trees, its members, that they are the darker side of light. Generally, Mrs. Moodie experiences alienation from the verge of Victorian era.Her perception is more complex than any other is, more than her husband and those having similar fate. The separation of dark and light begins to break down unto her senses. Paths and Thingscape Explained in this entry is the attempt of Mrs. Moodie to take course of assimilation, though she is unsure of what she is doing. She wants this to happen, as she ventures into a new world. In these words, she starts to wander of other persons embrace of the new world, asserting, Those who went ahead Of us in the forest Bent the early trees So that they grew the signals The trail was not among the trees butthe trees (Atwood 20) Again, she se es superiority over those who went ahead of her. She becomes the observer of the future unfolds of to the people comparable to her status. However, she dreams of awakening herself and accepting what these trees offer. She expresses what others dream of, extolling of the detriments, and there are some, who have dreams Of birds flying into shapes Of letters the skys codes And dream also The significance of numbers (count petals of certain flowers). (20) The endowment of certain plans to make their future pleasant upholds her wishes of a better future.It supports her adaptation to the new land. Even though it proclaims of an uncertain trail held by people superior to them, still, she manifests of her justifications as correct. Guided by uncertainty and mere courage she advances into a more treacherous state of adjusting, she exalts of her undertakings, In the morning I advance Through the doorway the sun On the bark, the inter- move branches, here a blue movement in the leaves, disper sed Calls/no trails rocks And grey tufts of moss (Atwood 20) Her endeavor of finally settling to new pastures becomes wide and unsurpassed.She feels more thriving of telling her spiritual bereavement over many things. More importantly, she endures of freedom like any body else and cannot commit herself to dependence. However, she feels insecurity of what is hiding unto the depths of the new world. She picks up the obligatory impression parallel with the others who dreamt of liberation. She exclaims of her concerns, The petals of the fire- Weed fall where they fall I am watched like an invader Who knows hostility but not where The day shrinks sanction from me (Atwood 21) Her definition inclines a surety of purposeful downfall after an undertaking.She exceeds advancement but treats it as a threat and not a triumph. Her overwhelmed quest modifies the sure picture of the superiority over her and excludes courageous acts. However, this comprehensive characterization of Mrs. Moodies op inions may be false, as some elements may prove supportive of what she plans or does. The transformation possible ends in a negative opinion rather than a separate entity. What she does not conceptualize is the harmonious feeling of the subjective entities around her. Even though this is partially correct, she gratifies each vision as complete though it is not.

African American Essay Essay Example for Free

African American Essay EssayAfrican American books is captivating, powerful, spiritual, and emotional. The recurring theme is slavery but in that respect are others such as inequality among sexes and races, injustice, resentment, and the strong belief in religion. These pieces of literature hold back been told by the individuals who went through the experience of slavery such as Frederick Douglass and others, like Jamaica Kincaid who have a passion for writing. The writers who experienced slavery themselves had differing views of their experience and relationship with their master. These pieces of literature share the pain, strength, heartache and will to go that each of these individuals experienced. The first reading is, To My Old Master, by Jourdan Anderson. This piece of literature is Andersons response to a garner he has received from his old master. It is a compelling yarn about how terrible and bad the Whites toughened the African Americans. The master wants Anderson and his family to hail back and work for him. He reminds the master about how poorly they were treated while working for him.Anderson states, Although you shot at me twice before I left over(p) you, I did non want to hear of your being hurt, and am glad you are still living. (1865, p. 15). Anderson tells the master that he is making money and his family is living and doing well. He even expresses that his children are receiving an education now. It is very apparent to the reader that Andersons wife does not want to return and work for the master. Mandy says she would be afraid to go back without some proof that you were disposed to treat us justly and kindly and we have concluded to test your sincerity by asking you to glow us our wages for the time we served you. (1865, p. 16). Anderson remembers how horribly the woman and girls were treated, and he will neer allow his daughters to go through that experience. I would stay here and starve- and die, if it generate to that- th an to have my girls brought to shame by the violence and wickedness of their young masters. (1865, p. 16) The end of the story the reader still feels Andersons resentment and bitterness toward the master. The next story and the one piece I enjoyed the most is, White Folks Treated Us Good by Marriah Hines. Hines states, My white people treated us decent. (p. 32). She goes onto yet explain how her master feed, dressed, and kept them well. Hines explains how terrible masters treated other slaves. Some unfortunate individuals practically have nothing to eat. Why, the way their owners treated them was disgraceful treated them like felines and canines (Hines, p. 32). Hines sounds fortunate and lucky to have worked for her master. The master gave the slaves Sunday off to rest and even allowed them to attend Church. Unlike other slaves Hines was never raped, vanquish, or treated in a physical horrible way.The compelling part of this piece occured when the slaves were allowed to leave mos t of them choose to stay. Most of us stayed amend there and raised our own crops. (p. 34). Hines knew of her freedom but believed in her loyalty to her master and his family. The master provided her with assistance and support. A rare occurrence to read an African American piece of literature that speaks of a master in a positive and delight inful manner. This master was a different man of his time. He did not take advantage of his slaves or treat them in a horrendous manner.This master used his slaves to care and run his property but treated them with respect and dignity, they deserved. Hines went onto, marry Benjamin F. Hines and give birth to five children. The last piece of literature is, If We Must Die by Claude McKay. This poem is about how horribly and stimulate Whites treated African Americans. It is written about the race riots in 1919. It describes the strength of the African Americans standing up to the Whites even if it ultimately meant dying. McKay states, Like men well lay out the murderous, cowardly pack, pressed to the wall, dying but fighting back (p. 378). This poem exemplifies the bravery and the will to fight for what is right otherwise these people would have been beaten and killed for the rest of their lives. There will always be a presence of racism in the world and specifically in the United States of America. Still instantly African Americans are treated equally as Whites. Although we as a country have come a very long way there is still work to be done. The more we educate people the less we will experience ignorance. The hate and the idea of inferiority will slow accrue if people become educated.I can end proudly stating that I am married to a Black man and we have two pleasing daughters, and I give an enormous amount of respect to those who fought for what was right. References Anderson, J. (1865). To my old master. In I. Reed (Ed. ), African American Literature. Abrief introduction and anthology (pp. 15-16). New York The Lo ngman Literaryphotomosaic Series. serial online. December 200536(4)299-323. Available from faculty member Search Complete, Ipswich, MA. Accessed May 23, 2011. Hines, M. (n. d. ). My white folks treated us good.In I. Reed (Ed. ), African Americanliterature. A brief introduction and anthology (pp. 21-25). New York TheLongman Literary Mosaic Series. serial online. December 200536(4)299-323. Available from Academic Search Complete, Ipswich, MA. Accessed May 21,2011. McKay, C. (n. d. ). If we must die. In I. Reed (Ed. ), African American literature. Abriefintroduction and anthology (pp. 378). New York The Longman LiterarySeriesserial online. December 200536(4)299-323. Available from AcademicSearchComplete, Ipswich, MA. Accessed Dec, 2011.

Gender Gender Socialization Theories

Gender Gender Socialization TheoriesAccording to many sociologists, there exists difference between sex and sexuality. Sex is the biological classification and gender is the import of social construction of separate roles of male persons and females.According to Lorber (2005), masculinity and femininity is not inborn that is children ar taught these traits. As soon as a child is localise as being a male or female then e realbody start treating him or her as such. Children learn to move in gendered ways by dint of the support of his environment. They are taught the gendered roles projected some unmatched who is female or male. As the child grows up, he develops his identity, know how to interact with others and learn the role to play in the society. Lorber, Judith. 2005. Night to His Day The Social Construction of Gender. In The Spirit of Sociology A Reader, ed. R. Matson, 292-305.New York Penguin.There are many drivers involved in the socialization process which transmits the t ralatitious gender role to the children and henceforth leading to occupational segregation later on.One set of gender socialization occur between parents and offspring. Parents are considered to be the primary agency in the process of socialization. They are inclined to interact with boys and girls in discrete styles. For example, a one year old baby is considered to oblige no sex difference, and however, parents are plausibly to act with boys and girls in dissimilar ways. They react to boys, when they seek interest by being aggressive and girls when they use gestures. much(prenominal) interaction have long term effect on girls and boys communication styles, leading boys to more assertive styles and girls with more emotive styles.Ann Oakley and Ruth Hartley (1974), studies point appear four main ways in which socialization into gender roles occur. Firstly, applying diverse physical and verbal manipulations to the child, for example, dressing a girl in feminine clothes. Secondly, mechanical drawing the child attention towards gender-identified toys. This is known as canalization whereby, boys and girls are given certain toys, clothing, sports equipment, and other objects are often culturally identified more with one gender than the other. Boys toys tend to encourage physical activity, whereas girls toys tend to stress physical proximity and mother-child talk.According to Oakley (1974), the socialization process aid to the maintenance of male strength and female subservience. The roles learn through the above process shape adult behaviour and hence, contribute to the reproduction of differences in behavior of males and females.Thirdly, Applies Different Verbal Descriptions to the same(p) Behavior Even years later,working in professional careers, women might find that they have to deal with different standards for the same behavior, being holler outed pushy, for example, for behavior at work that in men is admired for being aggressive. The same thing happe ns in childhood A boy is encouraged for being active, where as a girl is rebuked for being too rough. Or a girl is complimented for beinggentle, but a boy is criticized for not being competitive enough.Encourages or Discourages Certain conventional Gender-Identified ActivitiesAs a boy, were you asked to help mother with sewing, cooking, ironing, and the like? As a girl, were you made to help dad do yard work, shovel snow, passout the trash, and so on? For most children, its often the reverse. Note thatthe identification of girls with indoor domestic chores and boys with outdoorchores becomes training for stereotypical gender roles (McHale et al. 1990Blair 1992 Leaper 2002 Shellenbarger 2006).The education system is also considered to be a major part of the gender socialisation process. The hidden curriculum is known for reinforcing the traditional model of how girls and boys look and act through the use of carry material. For example, teachers reinforces gender roles by encouragi ng boys and girls to develop different skills. According to Thorne (1993), children also divide themselves along gender lines in the lunch room, claiming different spaces of the playground, and often mug individuals who violate gender roles.Mass media are one of the most powerful tools of gender socialization because television, magazines, radio, newspapers, video games, movies, and the Internet are ubiquitous in American culture. Like other social institutions, mass media reinforce traditional gender roles. Magazines targeted at girls and women emphasize the importance of physical appearance as well as finding, pleasing, and keeping a man. While boys and mens magazines also focus on the importance of physical appearance, they also stress the importance of financial success, competitive hobbies, and attracting women for sexual encounters (rather than haunting relationships). These supposed masculine and feminine characteristics and behaviors are reinforced across the media system, from video games and movies that show athletic heroes rescuing thin and busty damsels in distress, to television programs that depict women as housewives, nurses, and secretaries and men as lawyers, doctors, and corporate tycoons. Print media also play an important role in socialization. In childrens literature, for example, boys typically are the allys, who use strength and word to overcome an obstacle. When girls are included in stories, they are typically passive followers of the male leader or helpers eager to support the male protagonist in his plan. This state of affairs is undergoing change, however. An increasing number of television shows (Zena Warrior Princess, Buffy the Vampire Slayer, Alias, and Veronica Mars), movies(Laura Croft Tomb Raider and Elektra), and books (Harry Potter) have crafted new visions of masculinity and femininity. It remains to beseen if these images take hold and affect gender socialization processes.Mass mediaThey also learn gender roles, the be havior and activities expected of someone who is male or female. These expectations channel male and female energies in different gender- appropriate directions. As children learn to look and behave like boys or girls, most reproduce and perpetuate their societys version of how the devil sexes should be. When children fail to behave in gender-appropriate ways, their character becomes suspect (Lorber 2005)Lorber, Judith. 2005. Night to HisDay The Social Construction ofGender. In The Spirit of SociologyA Reader, ed. R. Matson, 292-305.New York Penguin.At the minimum people call girls who violate the rules tomboys and boys who do so sissies.The gender socialization process may be direct or indirect. It is indirect when children learn gender expectations by discover others words and behavior, such as the jokes, comments, and stories they hear about men and women or portrayals of men and women they see in magazines, books, and on television(Raag and Rackliff1998).Raag, Tarja, and Chris tine Rackliff.1998. Preschoolers Awarenessof Social Expectations of Gender Relationships to Toy Choices.Sex Roles A Journal of Research38(9-10) 685.Socialization is direct when significant others intentionally convey the societal expectations to children.Agents of SocializationAgents of socialization are the significant people, groups, and institutions that act to shape our gender identity-whether we identify as male, female, or something in between. Agents of socialization include family, classmates, peers, teachers, religious leaders, popular culture, and mass media. Child development specialist Beverly Fagot and her colleagues (1985) observed how preschool teachers shape gender identity. Specifically, the researchers focused on how toddlers, ages 12 and 24 months, in a play group interacted and communicated with one another and how teachers responded to the childrens attempts to communicate. Fagot, Beverly, Richard Hagan, Mary Driver Leinbach, and Sandra Kronsberg. 1985. Differen tial Reactions to Assertive and communicative Acts of Toddler Boys and Girls. Child Development 56(6) 1499-1505.Fagot found no differences in the interaction styles of 12-month-old boys and girls All of the children communicated by gestures, gentle touches, whining, crying, and screaming.The teachers, however, interacted with them in gender-specifi c ways. They were more likely to respond to girls who communicated in gentle, feminine ways and to boys who communicated in assertive, masculine ways. That is, the teachers tended to ignore girls assertive acts but respond to boys assertive acts. Thus, by the time these toddlers were two, they communicated in very different ways. Fagots research was conducted more than 20 years ago. A more recent study found that early childhood teachers are more accept of girls cross-gender behaviors and explorations than they are of boys. According to this research, teachers believe that boys who behave like sissies are at greater risk of growing up to be homosexual and psychologically ill-adjusted than are girls who behave like tomboys. This fi nding suggests that while American society has expanded the range of behaviors and appearances deemed acceptable for girls, it has not extended the range for boys in the same way (Cahill and Adams 1997).Childrens toys and noted images of males and females fi gure prominently in the socialization process, along with the ways in which adults treat children. Barbie dolls, for example, have been marketed since 1959 with the purpose of inspiring little girls to think about what they wanted to be when they grew up. The dolls are available in 67 countries. An estimated 95 percent of girls between ages 3 and 11 in the United States have Barbie dolls, which come in some(prenominal) different skin colors and 45 nationalities(Mattel 2010).

Literature Review On Clay Bricks Environmental Sciences Essay

Literature Review On Clay Bricks Environmental Sciences assayBrick is a core material that is comm just now used to build the bulwark of a build. Clay bricks argon the or so common brick type. It is made from sand and re principal(prenominal)s and uniformly burnt at temperatures between 800C and 1200C. Surface finishes ar sometimes applied, e.g. glazed bricks. Glazed bricks be still being produced in big(a) quantity and reality-closet be obtained from major English brick manufacturers and suppliers. Calcium Silicate bricks is manufactured from sand-lime (calcium silicate). The bricks atomic number 18 pressed under great pressure and steamed in an autoclave. The bricks argon smooth, fine textured and light in colour. The colour of the brick is produced from material source, composition and firing temperature.The size of bricks over time has castrated considerably. Some early medieval bricks were 13 inches by 6 inches by 2 inches. By the late 15th century a brick 9.5 inches by 4.5 inches by 2 inches became the norm and a postulate in 1571 stipulated bricks by the measurement of 9 inches by 4.5 inches by 2.25 inches. By the 18th century, 8.25 inches by 4 inches by 2.5 inches brick was introduced. Modern bricks are 8.5 inches by 4 inches by 2.5 inches which is fol wiped out(p)ing metrication translated to 215mm by 102.5mm by 65mm. Modern bricks are the bricks that are most used in buildings nowadays.2.1.2 Defect of SizeOversized bricks are rund by poor material selection and preparation or underfiring. Undersized bricks are casefuld mainly by poor material preparation, faulty moulds and overfiring.2.1.3 Defect of settleThere are many inst eachs which contri exactlye to flees in shape. These are including poor preparation of moulds or moulding technique, faults in stacking, rough handling and queer drying. If the bricks are considerably over burnt, incipient fusion impinge ons place and the bricks, called burrs, pass on come out of the kiln or c lamp and get s put in together. Burrs are able only for hardcore purposes.2.1.4 Defects of BodyFaults in the raw material empennage give rise to defects much(prenominal) as cracking, bloating and laminations. Cracking and warping of bricks, causing incipient weakness, whitethorn be due to exposure of verdure bricks to direct sunlight or rapid drying winds. Similar proceedss go out be produced by putting green bricks into the kiln too soon. Large cracks maybe pull ind by pelting getting onto hot bricks.2.1.5 Defect of AppearanceThese defects are acceptd primarily by faulty wires in the slip of wire-cut bricks. Dark spots are caused by the presence of unevenly distributed iron sulphide in the frame.2.2 Types of Brickwork Defects2.2.1 originationMost parts of a building are built using bricks. Nowadays, brickwork defects are commonly found in buildings. This problem is getting more serious as days go by. Brickwork defects may cause a lot of problems to the occupants. The ma in problem encountered in building with traditional outside bearing jetty of brickwork and cover inside bearing structure is caused by differences in the temperature and moisture-induced movement. Cracks may be discovered in groynes and solutions concord to be found to alleviate this problem. (Verhoef, 2001)Brickwork defect which occurs in buildings has a variety of reasons. This is perhaps non surprising when one considers the wide range of different bricks and techniques in the construction of building, differences in the construction localizes and the varied occupational or owner usage of the faultless building.Brickwork will deteriorate and decay if not properly maintained. Such deterioration croupe be caused by a number of factors and gage take conglomerate forms. The main signs that the brickwork is afflicted are surface growth and staining, gush, loosed brick becoming dislodged, cracks appear by means of the bricks or mortar and etc. (Moses Jenkins, 2007)In this s ub chapter, the different types of the brickwork defect will be de boundined. This chapter gives an overview of heterogeneous types of brickwork defects and understanding the brickwork defects. By identifying the different types of the brickwork defects, it will be easy for the occupants or owners to find out the causes of the defects and subsequently take the suitable remedy manners to address the problem.2.2.2 Brick Wall SettlementAny movement in a structuralbrick fence in will peril having the bond courses in the wall broken. Any movement in abrick veneer wall which has broken or loosened the connections between the veneers to the underlying structure is potentially dangerous and risk collapsing the masonry.2.2.3 Bulging Brick WallThis is likely to be a bond-brick or bond-course failure. This defect is potentially extremely dangerous and immediate action must be taken. If not, it will cause the building to suddenly collapse.2.2.4 Cracks and Bulges in Brick WallsFrost and eart h loading can push a below-grade brick foundation wall inward. The wall is often bulged inwards as well as showing horizontal and step cracking and loose bricks will surface over the bulged area. The damage occurs from slightly above ground level to roughly the frost line.2.2.5 Cracks and Loose BricksNormally, crack and loose bricks are caused by frost, settlement, elaborateness, diagonal and stair-stepped. These defects often happen at building corners where the roof tumble is endured.2.2.6 Loose Bricks and Missing or Lost MortarThis is the movement where the mortar is severely washed-out by roof spillage or other irrigate movement against the foundation. Loose and lost bricks may too occur where wood blocks, originally set into a wall to permit nailing of interior components, is dishonored by insects or decay. Similarly, if the wood joists are damaged and bent excessively or collapsed (insect damage, rot, fire), the collapsing joist can, as its in-wall end moves, damage the foundation or building wall. Fire cuts on wood joists in brick walls were intended to minimize this damage source by angling the end of the joist where it was set into the wall pocket.2.2.7 Spalling BricksSpalling is caused by water supply and frost, such as water leaking into a brick structure at any entry point a crack, a brick which has lost its hard surface, or at openings by window and door penetrations. It is best to also beware of caulking bricks.2.2.8 Exfoliating-Rust Damage to BricksMasonry wall will have these defects when brick walls have been improperly caulked where caulking should have been omitted. The most common precedent of this defect is the damage that occurs to a brick wall when a steel lintel over a window or door is caulked tightly between the brick and the steel. Moisture penetrating the brick wall through cracks or mortar joints is muddleped around the steel lintel. Rust developing on steel lintels has tremendous lifting personnel as the rusting exfoli ating metal expands, sufficient to crack and damage bricks around the lintel.Improper Repair Mortaron BrickworkDuring animate works, tuck pointing or re-pointing bricks can cause surface spalling of bricks if the mason uses a too hard mortar with high schoolschool portland content or mortar on soft bricks in a climate exposed to freezing weather. The high portland content means that the mortar will be not only harder, but more waterproof than the ring bricks. Water trapped around the hard mortar can freeze leading to surface spalling of the bricks. This is particularly likely to be seen when a wall has been tuck pointed using hard high-portland mortar where originally a soft high-lime mortar was used and where the original bricks were soft. common flavours on BrickworkSalts are a major cause of deterioration. Salt can enter bricks through foul water ingress. In coastal areas, salt can come from the sea and, in winter, the close application of path salt is a constant threat. Salt is damaging because it fixs a steady blowup of crystals within the bricks. This can eventually force the structure of the brick apart. The source of salt can occur from within the bricks themselves or from the application of contaminated mortars or renders. Brick lined chimney flues are also vulnerable as sulfates can be introduced when flu gasses condense. This is a common defect where a chimney has been sealed without adequate ventilation.2.2.11 Efflorescence on brickworkEfflorescence appears as a white fine-grained deposit on the brick. It is a phenomenon that soluble salt dissolved in water are carried, deposited and gradually accumulated on brick surfaces to form an unsightly scum. Without water, flower cannot occur. The soluble salts may be originated from the raw material of bricks. But in most cases, boot is caused by salts from the external sources such as ground water, contaminated atmosphere, mortar ingredients and other materials in contacts with the bricks. To minimize the risk, (it can never be completely avoided in brickwork exposed to weathering) the building detail should be designed, as far-off as is realizable, to avoid saturation. In other words, good overhangs, copings and sills with drips, need to be considered. Efflorescence can be helped on its way by sponging down the wall with clean water (avoiding substantial wetting) or dry brushing with soft brushes. Any other treatment should be avoided as it may disfigure the bricks.2.2.12 caloric fecal matter on BrickworkEvery materials expand or contracts as the temperature of the material transposes, typically expanding as its temperature increases and contracting as its temperature decreases. Different materials expand and contract at different rates when they undergo similar changes in their temperatures. Brick veneer can expand and contract approximately. When determining the expansion or contraction of a brick veneer, it is central to remember the effects of the sun on mate rials. The energy from the suns rays raises the temperature of a material well above the air temperature. On a day when the air temperature is 32 F, the energy from the sun can raise a walls temperature to above 100 F.2.2.12.1 Thermal expansion failures in Structural or Veneer Brick WallsA develop factor that can cause very largish movements and extensive damage to brick structures or brick veneer walls is the thermal expansion which occurs across a prospicient or tall brick wall when that wall is heated by intense sun exposure. The photographs show significant thermal expansion damage in a long brick structure.Significant breaks and gapsat vertical brick mortar joints due to thermal expansion and perhaps some frost and water damage.Figure1 Significant breaks in mortar naiant sliding breaksin brick mortar joints,exposing reinforcing wire to rust, exfoliation, and additional damage from those forces as the exfoliating wire produced still more pressure on the mortar joint.Figure2 Ho rizontal breaks in mortarStep crackingfollowing mortar joints near the building corners and where the wall movement was resisted by first story intersecting brick walls abutting at right angles the middle section of the long brick wall.Figure3 Step cracking in mortarCracks and broken bricks at the intersections of brick walls and openings.Figure 4 Cracks and broken bricks(InspectApedia, 2007)2.2.13 Moisture Movement on BrickworkMoisture affects all porous masonry materials, including bricks, mortars and concrete masonry units but in very different ways. These effects must be considered when a combination of these materials is used, such as when bricks rest on a concrete foundation, brick veneer units are used with block back up, and when brick and architectural concrete products are used in the same Wythe bands of precast concrete or architectural concrete block in a brick veneer. After their initial mixing or casting, mortar, poured-in-place concrete and concrete masonry units shri nk as the curing of the Portland cement proceeds. This is an unavoidable consequence of the curing of concrete products and is accommodated in design.2.2.14 Sulphate Attack on BrickworkMost ordinary riled bricks contain sulphates of sodium, magnesium or calcium. These salts are soluble in water, calcium sulphate being less soluble than the other two. Normally, these sulphates are seen as the clean efflorescence which affect style only and need simply to be brushed away. In theory, most brick walls with mortars based on OPC (Ordinary Portland Cement) are liable to sulphate lash out. The most vulnerable walls are earth-retaining walls and parapet walls but sulphate dishonour is a problem also on rendered, and facing brickwork.On rendered brickwork, sulphate attack is manifested by cracking of the rendering, the cracks being mainly horizontal and corresponding to the mortar joints below. The rendering may adhere quite well to the bricks early in the attack but areas are likely to become detached as the expansion of the underlying brickwork causes severance of the bond between the two materials. (Eldridge, 1976)2.2.15 Lime Staining on BrickworkLime staining occurs when calcium hydroxide is deposited on the face of brickwork. Lime staining will quickly absorb carbon dioxide from the air and becomes calcium carbonate. It is close to insoluble and can only be removed by expert which is a pricey treatment. The calcium hydroxide can come from three main sourcescalcium hydroxide caused by the hydration of Portland cementfrom hydrated lime added to mortarfrom brickwork in contact with wet concrete2.2.16 Porosity on BrickPorosity is an strategic characteristic of bricks. In contrast to other moulded or pre-cast building materials, the porosity of bricks is attributed to its fine capillaries. By virtue of the capillary effect, the rate of moisture transport in the brick is ten times faster than in other building materials. Moisture is released during day-time and re-absorbed during night-time. The ability to release and re-absorb moisture by capillary effect is one of the most useful properties of brick that helps to regulate the temperature and humidity of atmosphere in a building. This distinctive property makes bricks an admirable building material, particularly suitable for buildings in the tropics. On the other hand, all porous materials are susceptible to chemical attacks and liable to contamination from weathering agents like rain, running water and polluted air.2.2.17 Crack in Brick Faces / FirecracksThe finished appearance of clay brick can vary greatly this is because it is dependent on clay and the manufacturing bidding. Some products contain cracks of varying degree (sometimes referred to as firecracks) as an inherent feature. Firecracks are usually visible on the product as delivered. However, firecracks can be masked by the texture and surface sands used in the manufacturing process which becomes visible after the bricks are l aid as a result of natural weathering of exposed brickwork.2.2.18 Dampness of the Brick WallMore or less enduring moistness showing more clearly on the internal wall surface from ground level up to a height of about 750mm, but may be higher in severe cases or if the outer face is covered with a non-porous finish. The decorations may be damp, blistered or discoloured, or, if dry, may have been pushed off the wall by a film or salts which will often be seen as a fluffy crystalline growth. The possible causes of dampness in the brick wall are lack of DPC (damp proof course), by-passing of the DPC, and failure of the DPC material.2.2.19 Brick Growth and Expansion Gaps in BrickworkBricks undergo long-term permanent expansion over time. This expansion continues for the life of the brick, but the majority of the growth occurs early in its life. Most general purpose bricks have a coefficient of expansion in the range of 0.5-1.5mm/m (millimeters per meter) over fifteen years. Designers can use the values of the coefficient of expansion to accommodate for the growth of bricks by the size and spacing of the control joints. The provision of control gaps or articulation joints between parts of the structure during construction will accommodate movements within the structure over time. Numerous sources of movement exist and includeThe change in size of building materials with temperature, loading conditions and moisture contentThe differential change in size of building materials (for example, cement products shrink over time, whilst clay bricks expand slowly over time)Foundation and footings movementFrame movementFrame shorteningTemperature movementInternal horizontal and vertical movement2.3 Causes of the brickwork defects2.3.1 IntroductionBrickworks are used primarily in the construction of walls. To construct the brick wall required many skills, design, beat, selection of material, and technique. Lack of all expertise may cause the brickwork defects or failure of the building. The defects that occur in brickwork maybe the result of inherent faults, deficiencies in production, design, materials or workmanship, and attack by purlieual agents.After the brickwork has been constructed, it maybe meets of various requirements, climate, loading, and occupational in use. It is not surprising that defects happened or occurs frequently.In this sub chapter, the causes of the brickwork defects will be list out. To find out the actual causes of the brickwork defects will be easily for the occupational to take the right remedies immediately and reduces the brickwork defects happen.2.3.2 Selection of bricksThe choice of bricks is often influenced by the price but the quality required must also be carefully considered in order to avoid defects developing during the service life of the material. Therefore, the selection of suitable bricks for any particular purpose has often to be a trade-off between appearance and durability requirements on the one hand, and c ost on the other.This is not always possible to assess the quality of bricks by the colour, variability of colour of bricks of the same source and method of production can often be an indication of strength and durability variations.2.3.3 Storage of bricksBricks on site are rarely kept under adequate cover. Defects in the bricks resulting from the lack of adequate protection on the site are rarely apparent in the first place use. However, bad weather conditions can be detrimental to bricks in that saturation by rain can be responsible for both subsequent efflorescence and decoration defects.2.3.4 Soluble Salts in BricksUnder burnt bricks contain a high salt content. The salts come from the raw clay from which the bricks are made, or are formed in the burning process. Most clay bricks contain some soluble salts, but the types and amounts vary appreciably. The effect of the soluble salts on both efflorescence and the more serious problem of disintegration of bricks themselves are lar gely governed by the strength and pores structure of the bricks.2.3.5 Sulphate attackSulphates are salts which are naturally feed in industrial waste, gypsum product, clay bricks, flue condensates and in some ground waters. In persistently damp conditions, sulphate will react slowly with tricalcium aluminate forming a compound called calcium sulphoaluminate. This reaction causes the cement mortar or render of the brickwork to expend and eventually disintegrate.2.3.6 Solar RadiationWhile drying out of soil by trees is the most common reason for cracking in brickwork, some clay are also very susceptible to drying out by direct solar radiation. The northern facing wall is the most likely to be affected and stepped diagonal cracking is the most common symptom, usually occurring at the north eastern hemisphere and north west corner of the building. (Loveder, 2000)2.3.7 Migration of moistureThe movement of moisture beneath a building can produce the phenomenon known as long term dome an d saucer effect. The dome effect is a slow heaving of the soil caused by movement of moisture from the perimeter of the house to its centre, and the saucer effect is moisture moving in the opposite direction, from the centre towards the perimeter. The dome effect causes the walls to tilt outwards and the restraining influence of the roof produces horizontal cracks on the outside wall. These will be wider on the outside surface rather than the inner.2.3.8 Planting of treeSome of the brickwork defects may cause by big trees roots that plant nearby the building area. When planning to plant trees, the idea to be considering is the strength of the footings under the house. If lack of strength, the roots of the trees maybe grow into the ground under the building and cause the brick wall settlement and cracking.2.3.9 Uneven settlement of foundationsWhere a particular labored load is placed on the foundation such as a large column, movement may occur as moisture is squeezed out of the soil or the soil readjusts itself. This consolidation will stop when the soil has finally compacted exuberant to support the load. Brick wall or masonry wall may crack which may result from movement during coalition.2.3.10 Excessive vibrationDamage caused by vibration from earth tremors, heavy traffic or pile driving is fairly rare, however if the vibration is great enough to actually cause the foundation to move, brickwork cracking or defect can occur. The crack will show up irregularly if the sources of the vibration cannot be removed. (Loveder, 2000)2.3.11 Additional buildingBuilding an addition building onto a house or add more storey of houses can impose a load intensity on the soil different that which is on that point already and so cause differential settlement. Even if the loading intensities are similar, the difference in time between when the two settlements occurred can be enough to create the brick wall cracks.2.3.12 Approach of designDesign of brick wall is very importa nt. The designer must have the knowledge about the brick experience in chosen the types of brick to be used. The designer must be fully aware of the clients needs. Defects often occur because of a lack of understanding of the different types of bricks and the method of construct the brick wall.2.3.13 Lack experience of workerWorkers in the masonry construction is not in strict accordance with the construction and standards, masonry mortar is not full, especially in vertical mortar joints are not full, and even produce dense seam, seam permeability. In addition, the dry brick on the wall, mortar in the brick water was absorbed, causing low strength of mortar, brick and mortar separation, so that the overall stiffness of masonry fell, gray mortar joints crack.2.3.14 OverloadingCracks of brickwork may result from overloading of the ground on which the building rests, or of the building itself or parts of it. evacuant the load does not necessary allow the masonry wall to revert to its o riginal state since the overloading may have been partially accommodated by a permanent compaction of the bricks. The forces responsible for the overloading may be of external origin, such as excessive wind, or may be internal, such as those arising from the installation of excessively heavy equipment for which the masonry wall was not designed. A change of occupational may have same results.2.3.15 Lack of maintenanceMaintenance must be taken for all the building to minimize the cost of repair work for seriously defects happen. Lack of maintenance will make a small cracks or defects on brickwork change to more serious and serious.2.3.16 Improper soil analysis and preparationWhen a builder chooses an area of land to build on, it is important to do some smorgasbord of soil analysis and preparation. The analysis will provide the developer and/or builder with enough information to choose the adequate soil preparation and construction schema that should be used to develop the land. Imp roper soil analysis and preparations can be very damaging to a housing development. For example, a builder can discover that the land soil is made up of expansive soil. If this is the case, houses need to have a foundation that will be able to support the changing pressure and consistency of the soil. This is because expansive soil will swell when wet and then shrink once it dries. If one builds on this type of soil and is not aware of it, there will inevitably be issues to handle. There will be crack in the brick wall or masonry wall. The repair of this is very costly and very intrusive. Unfortunately, the reality is improper soil analysis and preparations happen all the time.2.3.17 Negligence of constructionNegligent construction is an unfortunately common occurrence. A builder has to be very careful when choosing a asserter or subcontractor. A builder will sometimes use one contactor for various projects. A contractor may have skills to install floor tiles but not the know how to build a brick wall. The responsibility can fall on several parties when there is a defect, and thats up to your attorney to determine.2.3.18 Movement of the groundMining subsidence, landslips, earthquakes, or moisture changes of shrinkable clay soil may cause the movement of the ground. The brick wall of the building will be crack because the wall of building has become displaced from the rest without any change in actual size of the materials. In theory, this is possible to reconnect the displace parts to bring the building back to its original condition but in practice this seldom can be done.2.3.19 Acid rainAcid rain is precipitation that is much more acidic than normal rainfall, and the acid rain is usually caused by pollution such as due south and nitrogen emissions. Several different mechanisms are operant in the deterioration of brick masonry through the action of acid rain. The bricks are susceptible to acid rain through the selective dissolution of their glassy phase. Th e mortar is affected mainly by the reaction of the calcareous components. The soluble salts resulting from these reactions, in solution with rain water or condensed moisture, will migrate through the porous matrix of the masonry. In the places where the water evaporates the salts will be deposited. Repeated dissolution and re-crystallization of these salts leads to the mechanical disruption of the masonry structure. Since the salts will concentrate in the more porous material, either the brick or the mortar will be more seriously affected, depending on their relative porosity.2.3.20 EnvironmentTwo aspects of the environment have been considerably which is wind and temperature. This is because they cause loading to be applied to the structure. The strong wind may cause the brick wall or the whole building move, this may cause cracking to the part of the building. The high temperature applied to the brickwork may cause spalling and brick prolong to high temperature can lead to surface vitrification. (Swoden, 1990)2.4 Remedies method of the brickwork defects in building2.4.1 IntroductionAs known early, brickwork is one of the largest parts of most of the building. The strength, stability, and durability of brickwork are very important. If lack of all those factor, the brick wall or masonry wall maybe fall down or collapse suddenly.If the brickwork occurs any cracking or defects, the right method of remedies must be taken immediately. This is to ensure that the occupational or owner use the building under safety and healthy purposes.Brickwork will deteriorate and decay if not properly maintained. Such deterioration can be caused by a number of factors and can take various forms. The main signs that brickwork is suffering are surface growth and staining, efflorescence, loosed brick becoming dislodged, crack appears contribute the bricks or mortar and etc. So, the right remedy must be taken to ensure the brickwork do not decay and deteriorate. (Moses Jenkins, 2007) In this sub chapter, the remedies method for various types of defects will be list out. This is to avoid the brickwork defect getting serious in building in construction industry. The defects of brickwork must be repair immediately, if not the defects will be more serious. For example, cracking can be due to expansion or shrinkage the clay brickwork itself.2.4.2 Remedies of efflorescenceEfflorescence can be minimized by laying dry bricks and by speeding up the drying process after the bricks have been laid by providing good ventilation. The salts that cause efflorescence are soluble in water. Hosing with water will cause the salts to dissolve and be re-absorbed into the brickwork, and then reappear when the brick wall dries out again. Acid or alkaline treatments are not recommended as they increase the salt content of the wall. The best method is simply brush off the deposit with a stiff dry bristle brush after the wall has dried out. Then sponge the surface with a damp synthetic ch amois or high suction sponge. Use very little water and rinse sponge frequently in fresh water.2.4.3 Sand-Blasted BricksWhich have been cleaned of old paint, algae, or stains using high pressure sand blasting or possibly even very high pressure water blasting can be permanently damaged by loss of the harder surface of the bricks which had been provided by their original firing. Once the softer internal brick has been exposed, the bricks will be more inclined to absorb water and to suffer water and frost damage. Sandblasting brick is considered a poor practice in building renovation and maintenance.2.4.4 Remedies of sulphate attackThe effects of sulphate attack manifest themselves as expansion of the jointing mortar. On rendered walls the signs are horizontal cracking of the rendering with portions falling off. Advanced stages of attack may make the structure unsafe. When rebuilding is necessary, the bricks use should be of low sulphate content and the mortar should be of a mix of 11 6 sulphate-resistance Portland cement hydrated lime sand. In addition, care should be taken to exclude all conditions of dampness. On rendered walls, the rendering should be removed and the brickwork allowed to dry before reapplying a weaker mix of sulphate-resistance cement, lime and sand.2.4.5 Tackling DecayWhere decay has occurred, take action to rectify the damage will be necessary before this leads to greater problems. The use of chemical treatments to stabilize brick should only be considered with extreme caution. Whilst the defects may be effective initially, there has been insufficient research carried out on the possible long term damage such treatments could have. Chemical sealants can trap moisture within the brick just as effectively as the claims to keep water out.2.4.6 CleaningCleaning soiled brick buildings should be undertaken carefully. In the past, the use of inappropriate killing techniques has resulted in considerable damage being done. If considered essential small scale tests should be employed to assess the effectiveness and likely damage which could be caused before any large scale work is carried out. There are some guides when doing the cleaning works-Do not re-clean brickwork with the same chemicals unless recommended by the cleaning chemical manufacturer.If there is deterioration, or suspected deterioration, in the mortar joints, additional water and chemicals need

Introduction To The Solar System Environmental Sciences Essay

Introduction To The Solar clay Environmental Sciences EssayA. This essay will briefly describe the planets and how they relate to the planet primer coat. The bulge out and inner geology, the atmosphere, and other general properties will show how the other planets argon not unlike the reality.B. How do the unique characteristics of each major solar frame body comp be with the planet Earth primarily the mass and density, and the composition?2. The Planets Other Objects. The charted regions of the Solar System consist of the Sun, four-spot terrestrial inner planets, an angular whang composed of dinky stimulatey bodies, four shooter giant outer planets, and a second belt, called the Kuiper belt, composed of icy objects. Beyond the Kuiper belt is divinatory Oort cloud. The inner Solar System is the traditional name for the region comprising the terrestrial planets and star-shapeds. Composed generally of silicates and metals, the objects of the inner Solar System crowd truly closely to the Sun the radius of this entire region is shorter than the distance amongst Jupiter and Saturn. The four inner or terrestrial planets comport dense, rocknrolly compositions, few or no moons, and no ring dodges. They be composed largely of minerals with high melting points, much(prenominal) as the silicates which course their solid crusts and semi- runny wrap uping-sheets, and metals such as iron and nickel, which form their cores. Three of the four inner planets (genus Venus, Earth and deflower) have signifi supportt atmospheres all have adjoin craters and tectonic mount features such as prisonbreak valleys and volcanoes. Our probe, the extrasensory perception parts the exploration of the solar system with the third planet from the sun, the Earth and the fifth largest in our solar system. Astronomers usually measure distances inside the Solar System in astronomical units (AU). One AU is the approximate distance between the Earth and the Sun or roughly 149,598,000 km (93,000,000 mi).A. The Earth. The mass of the Earth is 5.98 E24 kg with a average density of 5,520 kg/m3 and the densest of any planet in the solar system. Earths diameter is just a few hundred kilometers larger than that of Venus, and considered our sister planet. Earth is the largest of the inner planets, the solely one planet cognise to have menses geological activity, although in that respect be moons of Jupiter and Saturn that have seismic activity, and the only planet kn testify to have life. Its liquid hydrosphere is unique among the terrestrial planets, and it is also the only planet where carapace tectonics has been find, unlike Venus where there is no evidence of plate tectonics. Earths atmosphere is radically contrastive from those of the other planets, having been altered by the presence of life (in dickens oxygen generating events) to contain 21% free oxygen. It has one send, the lunation, the only large satellite of a terrestrial planet in th e Solar System so large as comp bed to its planet. No other moon-planet has this size ratio.The four seasons are a result of Earths axis of rotation being atilt 23.45 degrees with respect to the plane of Earths orbit around the sun. During part of the year, the northern hemisphere is tilted toward the sun and the southern hemisphere is tilted away, producing summer in the north and winter in the south. Six months later, the situation is reversed. During March and September, when spring and fall begin in the northern hemisphere, both hemispheres receive n archaeozoic equal amounts of solar illumination. Earths global ocean, which c ein truthplaces nearly 70 percent of the planets scrape, has an average depth of about 4 km (2.5 miles). Fresh water supply exists in the liquid phase only within a narrow temperature span, 32 to 212 degrees Fahrenheit (0 to 100 degrees Celsius). The presence and dispersion of water vapor in the atmosphere is responsible for much of Earths weather.The Earths rapid rotation and molten nickel-iron core create the magnetized cogitation which prevents the solar move up from reaching the come forth (the solar wind is a stream of charged particles continuously ejected from the sun.) The Earths magnetic landing survey does not fade off into space, only has expressed boundaries. When charged particles from the solar wind become trapped in Earths magnetic field, they collide with air molecules above our planets magnetic poles. These air molecules then begin to glow, and are known as the aurora the northern and southern lights. Earths lithosphere, which includes the crust (both continental and oceanic) and the upper mantle, is divided into huge plates that are constantly moving, and the movement is accurately mulish via radio telescopes from a stationary point such as a star . Earthquakes result when plates grind past one another, ride up over one another, collide to make mountains, or split and separate. The theory of motion o f the large plates of the lithosphere is known as plate tectonics. Developed within the ut around 40 geezerhood, this explanation has unified the results of centuries of study of our planet.The Earths atmosphere consists of 78 percent nitrogen, 21 percent oxygen and 1 percent argon and other spectre grammatical constituents. The atmosphere affects Earths long-term climate and short-term local weather, shields us from much of the harmful radiation coming from the sun and protects us from meteors as well, roughly of which glow up before they can strike the surface as meteorites. Before the extrasensory perception leaves the immediate vicinity of the Earth, ESP will begin the journey beginning with Earths Moon nigh 250,000 miles away.B. The Moon. The Earths moon provides a much livable planet by moderating our home planets wobble on its axis, leading to a relatively stable climate, and creating a rhythm that has guided humans for thousands of years. The Moon was likely forme d afterwards a deflower-sized body collided with Earth approximately 4.5 billion years ago, and the resulting debris accumulated (or accreted) to form our natural satellite. The newly formed Moon was in a molten state. Within about 100 one million million years, most of the global magma ocean had crystallized, with less dense rocks floating upward and eventually forming the lunar crust.The moons surface shows four significant impact structures and are used to understand objects on the Moon are called the Nectaris and Imbrium basins and the craters Eratosthenes and Copernicus. The Moon was first visited by the USSRs Luna 1 and Luna 2 in 1959. These were followed by a number of U.S. and Soviet robotic spacecraft. The U.S. sent deuce-ace classes of robotic missions to prepare the way for human exploration, the Rangers (1961-1965) were impact probes, the Lunar Orbiters (1966-1967) mapped the surface to find arrive place sites and the Surveyors (1966-1968) were soft landers. The fi rst human landing on the Moon was on 20 July 1969. During the Apollo missions of 1969-1972, 12 American astronauts walked on the Moon and used a Lunar Roving Vehicle to travel on the surface to investigate smear mechanics, meteoroids, lunar ranging, magnetic fields and the solar wind. The Apollo astronauts brought back 382 kg (842 pounds) of rock and soil to Earth for study.The Moon has no internally generated magnetic field, although areas of magnetism are preserved in the lunar crust, but how this occurred remains a mystery to science. The early Moon appears not to have had the right conditions to develop an internal dynamo, the appliance for global magnetic fields for the terrestrial planets so an iron-core did not form or have the ability for motion. In retrospect, no magnetic field whitethorn be a good thing as perhaps there would be some interactions between the Earths magnetic filed and the moons, when considering the abnormal size ratio between these bodies.With no atmosp here to impede impacts, a steady rain of asteroids, meteoroids and comets strike the surface. Over billions of years, the surface has been ground up into fragments ranging from huge boulders to powder. Nearly the entire Moon is covered by a rubble pile of gray, powdery dust and rocky debris called the lunar regolith. Beneath the regolith is a region of fractured bedrock referred to as the megaregolith. The ESP now leaves the Earth to journey toward the sun and visit the second clo rear to the sun, Venus our sister planet.C. Venus. From the Earth, the distance to Venus is about 23 million miles, and 0.723 AU from the sun. The orbital period of Venus is about 225 Earth days long, while the planets sidereal rotation period is 243 Earth days, making a Venus solar day about 117 Earth days long. Venus has no natural satellites. The mass of Venus is 4.87 E24 kg and close in size to Earth (0.815 Earth pack) and, like Earth, has a thick silicate mantle around an iron core, a substantial atm osphere and evidence of internal geological activity. Because of the confusable silicate mantle around an iron corer, the density is not unlike the Earths at 5,250 kg/m2. The slow rotation of Venus cannot generate a magnetic field similar to Earths, though its iron core is similar to that of the Earth and approximately 3,000 km (1,900 miles) in radius. Venus rotates retrograde (east to west) compared with Earths (west to east) rotation. Seen from Venus, the sun would rise in the west and set in the east.Current thinking suggests that Venus was completely resurfaced by volcanic activity 300 to five hundred million years ago. More than 1,000 volcanoes or volcanic centers larger than 20 km (12 miles) in diameter dot the surface. Volcanic flows have produced long, channels extending for hundreds of kilometers. Venus has two large highland areas Ishtar Terra, about the size of Australia, in the North Polar Region and Aphrodite Terra, about the size of South America, straddling the equa tor and extending for almost 10,000 km (6,000 miles). Maxwell Montes, the highest mountain on Venus and comparable to get on with Everest on Earth, is at the eastern edge of Ishtar Terra. No definitive evidence of current geological activity has been detected on Venus, but as mentioned it has no magnetic field that would prevent depletion of its substantial atmosphere, which suggests that its atmosphere is regularly replenished by volcanic eruptions.Venus atmosphere consists mainly of carbon dioxide, with clouds of sulfuric acid droplets with sign amounts of water detected in the atmosphere (96% carbon dioxide, 3% nitrogen, and 0.1% water vapor.) The atmosphere is much drier than Earth and ninety times as dense. It is the hottest planet, with surface temperatures over 400 C, most likely due to the amount of greenhouse gases in the atmosphere. The thick atmosphere traps the suns heat, resulting in surface temperatures higher than 880 degrees Fahrenheit (471 degrees Celsius). Probe s that have landed on Venus survived only a few hours before being destroyed by the incredible temperatures. Sulfur compounds are abundant in Venus clouds. The corrosive chemistry and dense, moving atmosphere cause significant surface weathering and erosion. Atmospheric lightning bursts were confirmed in 2007 by the European Venus mouth orbiter. On Earth, Jupiter and Saturn, lightning is associated with water clouds, but on Venus, it is associated with clouds of sulfuric acid. As we leave the Venusian orbit, Earths probe ESP continues toward the sun and onward Mercury.D. Mercury. The closest planet to the Sun and the smallest planet (0.055 Earth masses), Mercury is 0.387 AU from the sun. Mercury has no natural satellites, and its mass is 3.30 E23 kg with an average density of 5,420 kg/m3. The similarity of the rocky terrestrial planets is apparent. Mercurys surface resembles that of Earths Moon, scarred by many impact craters resulting from collisions with meteoroids and comets. Wh ile there are areas of smooth terrain, there are also scarps or cliffs, some hundreds of miles long and coast up to a mile high, formed by contraction of the crust.Mercury is the second densest planet after Earth, with a large metallic core having a radius of 1,800 to 1,900 km (1,100 to 1,200 miles), about 75 percent of the planets radius (Earths core is many times smaller compared to the planets diameter). In 2007, researchers using ground-based radars to study the core bring evidence that it is molten (liquid). Mercurys outer shell, comparable to Earths outer shell (called the mantle), is only 500 to 600 km (300 to 400 miles) thick. The only known geological features besides impact craters are wrinkle-ridges, probably produced by a period of contraction early in its hi paper. The Caloris Basin, one of the largest features on Mercury, is about 1,550 km (960 miles) in diameter. It was the result of a possible asteroid impact on the planets surface early in the solar systems histor y.Mercurys almost negligible atmosphere consists of atoms blasted off its surface by the solar wind. Though Mercurys magnetic field has just 1 percent the strength of Earths, the field is very active. The magnetic field in the solar wind creates intense magnetic tornadoes that channel the fast, hot solar wind plasma down to the surface. When these ions strike the surface, they knock off neutral atoms and send them high into the vend where other processes may fling them back to the surface or accelerate them away from Mercury. As we leave Mercury before heading out to the deepest regions of the solar system, the ESP will make a fly-by of the sun, as the voyager probes did around Jupiter and Saturn to increase the velocity.E. Our Sun. The principal component of the Solar System is the Sun that contains 99.86% of the systems known mass and dominates it gravitationally. Jupiter and Saturn, the Suns two largest orbiting bodies, account for more than 90% of the systems remaining mass. Mo st large objects in orbit around the Sun lie near the plane of Earths orbit, known as the ecliptic. The planets are very close to the ecliptic while comets and Kuiper belt objects are usually at significantly greater angles to it. The orbits of the planets are nearly circular, but many comets, asteroids and objects of the Kuiper belt follow highly-elliptical orbits. The probe ESP circles the sun emollienting up velocity to begin the voyage to vitiate again passing the terrestrial planets.F. The Red Planet, mar. mar is smaller than Earth and Venus (0.107 Earth masses) has a mass of 6.42 E23 kg and a mean density of 3,940 kg/m3 (lower than that of the other terrestrial planets,) and is 1.524 AU from the sun. vitiate is a cold desert-like world similar to our Southwestern States, and has the same amount of dry land. Like Earth, Mars has seasons, polar ice caps, volcanoes, canyons and weather, but its atmosphere is besides thin for liquid water to exist for long on the surface. Ther e are signs of ancient floods on Mars, but evidence for water now exists mainly in icy soil and thin clouds. Mars has two tiny natural satellites Deimos and Phobos thought to be captured asteroids. Mars experiences seasons because of the tilt of its rotational axis (in comparison to the plane of its orbit). Mars orbit is slightly elliptical, so its distance to the sun changes, affecting the Martian seasons that last longer than those of Earth. The polar ice caps on Mars grow and recede with the seasons layered areas near the poles suggest that the planets climate has changed more than once.Mars is a rocky body about half the size of Earth. As with the other terrestrial planets (Mercury, Venus and Earth) the surface of Mars has been altered by volcanism, impacts, crustal movement, and atmospheric effects such as dust storms. Volcanism in the highlands and plains was active more than 3 billion years ago, but some of the giant shield volcanoes are younger, having formed between 1 and 2 billion years ago. Mars has the largest volcanic mountain in the solar system, Olympus Mons, as well as a spectacular equatorial canyon system, Valles Marineris. Mars has no global magnetic field, but NASAs Mars Global Surveyor orbiter found that areas of the Martian crust in the southern hemisphere are highly magnetized. Evidently, these are traces of a magnetic field that remain in the planets crust from about 4 billion years ago. Mars often appears reddish due to a combination of the occurrence that its surface is comprised of iron-rich minerals that rust (or oxidize) and that the dust made of these minerals is kicked up into the atmosphere, giving the atmosphere a reddish hue as well.Mars possesses an atmosphere of mostly carbon dioxide (seems like a natural tendency of the terrestrial planets), and other gases (nitrogen 3%, and argon 1.6 %.) The thin atmosphere on Mars does not allow liquid water to exist at the surface for long, and the quantity of water required to carve Mars great channels and flood plains is not obvious today. Unraveling the story of water on Mars is important to unlocking its climate history, which will help us understand the evolution of all the planets. Water is believed to be an essential ingredient for life evidence of past or present water on Mars is expected to hold clues about whether Mars could ever have been a habitat for life. In summary, there is evidence and good science that large quantities of water may still be present below the surface.Scientists believe that Mars experienced huge floods about 3.5 billion years ago, though it is not know where the ancient flood water came from, how long it lasted or where it went, new-fangled missions to Mars have uncovered exciting evidence. In 2002, NASAs Mars Odyssey orbiter detected henry-rich polar deposits, indicating large quantities of water ice close to the surface. Further observations found hydrogen in other areas as well. If water ice permeated the entire planet, Mar s could have substantial subsurface layers of frozen water, and if true, the long-term colonization of Mars is probable. In 2004, the Mars Exploration Rover named Opportunity found structures and minerals indicating that liquid water was once present at its landing site. The rovers twin, Spirit, also found the signature of ancient water near its landing site halfway around Mars from Opportunitys location. Recently, in August 2012, the probe Curiosity made another surface landing in a crater and being the first nuclear-powered probe. Leaving Mars orbit and the terrestrial planets, ESP moves further from the sun to explore the left-over remains from the formation of the solar system, the Asteroid belt.G. The Asteroids Belt. These small Solar System bodies are mostly composed of rocky and metallic non-volatile minerals. Tens of thousands of these minor planets and small rocky bodies are self-contained in the main asteroid belt, a vast doughnut-shaped ring between the orbits of Mars a nd Jupiter. Asteroids that pass close to Earth are called Near-Earth Objects (NEOs). The main asteroid belt occupies the orbit between Mars and Jupiter, and is between 2.3 and 3.3 AU from the Sun. It is thought to be remnants from the Solar Systems formation that failed to coalesce because of the gravitational interference of Jupiter. Asteroids range in size from hundreds of kilometers across to microscopic. Despite this, the total mass of the main belt is unlikely to be more than a thousandth of that of the Earth. The main belt is very sparsely populated spacecraft routinely pass through without incident. Asteroids with diameters between 10 and 10-4 m are called meteoroids.Asteroid groups in the main belt are divided into groups and families based on their orbital characteristics. Asteroid moons are asteroids that orbit larger asteroids. They are not as clearly distinguished as telluric moons, sometimes being almost as large as their partners. The asteroid belt also contains main- belt comets which may have been the source of Earths water. The inner Solar System is also dusted with rogue asteroids, many of which cross the orbits of the inner planets.The three broad composition classes of asteroids are C-, S- and M-types. The C-type asteroids (carbonaceous) are most common, and probably consist of clay and silicate rocks and are dark in appearance. C-type asteroids are among the most ancient objects in our solar system. The S-types (silicaceous) are made up of silicate (stony) materials and nickel-iron. M-types (metallic) are made up of nickel-iron. The asteroids compositional differences are related to how far from the sun they formed. Some experienced high temperatures after they formed and partly melted, with iron sinking to the center and forcing basaltic (volcanic) lava to the surface. One such asteroid, Vesta, survives to this day. Ceres is 2.77 AU from the sun, is the largest body in the asteroid belt, and considered a dwarf planet. It has a diameter of slightly less than 1000 km, large enough for its own gravity to pull it into a spherical shape. Ceres was considered a planet when it was discovered in the 19th century, but was reclassified as an asteroid in the 1850s as further observation revealed additional asteroids. It was again reclassified in 2006 as a dwarf planet along with Pluto. Leaving the left-over rubble of the Asteroid belt ESP now begins s very long journeys as did the Voyager, and Cassini probes and visit the four outer planets, or gas giants (sometimes called Jovian planets), and collectively make up 99 percent of the mass known to orbit the Sun.H. The Gas giants Jupiter. Jupiter and Saturns atmospheres are largely hydrogen and helium. Uranus and Neptunes atmospheres have a higher percentage of ices, such as water, ammonium hydroxide and methane. Some astronomers suggest they belong in their own category, ice giants. All four gas giants have rings, although only Saturns ring system is easily observed from Earth . Our probe ESP approaches Jupiter at an average distance of 5.203 AU from the sun we are now in the region of deep space. Jupiter at 318 Earth masses has 2.5 times the mass of all the other planets put together, and an average density of 1,314 kg/m3. It is composed largely of hydrogen and helium. Jupiters internal heat creates semi-permanent features in its atmosphere, such as cloud bands and the Great Red Spot.On 7 January 1610, using a telescope (probably the first) he constructed, astronomer Galileo Galilei saw four small stars as he first thought near Jupiter. He had discovered Jupiters four largest moons, now called Io, Europa, Ganymede, and Callisto. These four moons are known today as the Galilean satellites. In retrospect, Jupiter has sixty-three known satellites, and show similarities to the terrestrial planets, such as volcanism and internal heating. Galileos surprise and illumination is understood. In 2004, while looking through a small Meade reflecting telescope, Jupite rs four largest moons were visible as they were all in a straight line moving around the planets equatorial plane. For the first time ever, I gazed at four moons in the solar system other than our own, and it was an amazing sight. Looking at Jupiter from an Earth or near-orbit telescope or planetary probe, the apparent surface and appearance is a blend of striking colors and atmospheric features. Most visible clouds are composed of ammonia, and water vapor exists deep below and can sometimes be seen through clear spots in the clouds. The planets stripes are dark belts and light zones are created by strong east-west winds in Jupiters upper atmosphere. The Great Red Spot, a giant spinning storm, has been observed since the 1800s, and in recent years, three storms merged to form the Little Red Spot, about half the size of the Great Red Spot. In December 1995, NASAs Galileo spacecraft dropped a probe into Jupiters atmosphere, which made the first direct measurements of the planets atmos phere, and began a multiyear study of Jupiter and the largest moons.The magnetic field of Jupiter and is nearly 20,000 times as powerful as Earths. Trapped within Jupiters magnetosphere (the area in which magnetic field lines encircle the planet from pole to pole) are swarms of charged particles. Jupiters rings and moons are embedded in an intense radiation belt of electrons and ions trapped by the magnetic field, and perhaps a moon landing is possible in the future, but protection from this radiation will be necessary.Jupiters atmosphere is similar to that of the sun, and the composition is mostly hydrogen and helium. Deep in the atmosphere, the twinge and temperature increase, compressing the hydrogen gas into a liquid. At further depths, the hydrogen becomes metallic and electrically conducting. In this metallic layer, Jupiters powerful magnetic field is generated by electrical currents driven by Jupiters fast rotation (9.8 Earth hours.) At the center, the immense pressure may s upport a solid core of rock about the size of Earth.Jupiters Galilean Satellites. Io is the most volcanically active body in the solar system and the surface is covered by sulfur in different multi-colored forms. As Io travels in its slightly elliptical orbit, Jupiters immense gravity causes tides in the solid surface that rise 100 m (300 feet) high on Io, generating enough heat for volcanic activity and to drive off any water. Ios volcanoes are driven by hot silicate magma.Europas surface is mostly water ice, and there is evidence that it may be covering an ocean of water or ice beneath. Europa is thought to have twice as much water as does Earth, and intrigues scientists because of its potential for having a habitable zone. Life forms have been found thriving near subterranean volcanoes on Earth and in other extreme locations that may be analogues to what may exist on Europa. Given the right chance and some basic conditions, life is possible on so many different levels. Ganymede i s the largest moon in the solar system (larger than the planet Mercury), and is the only moon known to have its own internally generated magnetic field. Callistos surface is extremely heavily cratered and ancient, a visible record of events from the early history of the solar system. However, the very few small craters on Callisto indicate a small degree of current surface activity.The interiors of Io, Europa and Ganymede have a layered structure similar to the Earth). Io, Europa and Ganymede all have cores and mantles partially molten rock or a solid rock envelope around the core. The surface of Europa and Ganymede is a thick, soft ice layer and a thin crust of impure water ice. In the case of Europa, a subsurface water layer probably lies just below the icy crust and may cover the entire moon. This makes Europa a candidate for moon landing, but in the movie 2001 A Space Odyssey, mankind was forbidden to land on Europa, however, we will of course disregard. Layering at Callisto is less well defined and appears to be mainly a mixture of ice and rock. As ESP leaves the Jovian world and once more, as the voyager space probes successfully navigated, rounds the giant planet to pick up additional speed for the voyage to Saturn, and beyond.I. Saturn. At 9.5 AU from the sun Saturn has a mass of 5.69 E26 kg. With an average density of 690 kg/m3, Saturn is far less spacious than any planet in the solar system, being only 95 Earth masses and could be floated in water since its density is less than that of water. historied for its extensive ring system, Saturn has similarities to Jupiter, such as its atmospheric composition, as Saturn is mostly a massive ball of hydrogen and helium. Saturn is unique among the planets. All four gas giant planets have rings, made of chunks of ice and rock, but none are as spectacular or as complicated as Saturns. Saturns magnetic field is not as huge as Jupiters, however it is still 578 times as powerful as the Earths. Saturn, its rings and many of its satellites lie totally within Saturns own enormous magnetosphere (the region of space in which the behavior of electrically charged particles is influenced more by Saturns magnetic field) than by the solar wind. Jupiter shares the magnetic field similarity.Saturn has sixty known satellites two of which, Titan and Enceladus, show signs of geological activity, though they are largely made of ice. Titan is larger than Mercury and the only satellite in the Solar System with a substantial atmosphere. In 1610, Italian astronomer Galileo Galilei was the first to gaze at Saturn through a telescope, and in 2004, after seeing Jupiters Galilean satellites I saw the outline of Saturns rings. My image was not unlike Galileos where I could resolve the rings, not their structure or color, and noticed a dark space between the ring system and the planet was visible. Although a fascinating sight, nothing compared to seeing the Galilean satellites. However, to credit Galileo, my modern -day meade-reflector was equal to Galileos very first refractor a testament to the mind of a genius. He would probably say, they dont build them like they used too.Winds in the upper atmosphere reach 500 m (1,600 feet) per second near the equatorial region. These super-fast winds, combined with heat rising from within the planets interior, cause the yellow and gold bands visible in the atmosphere. In the early 1980s, NASAs Voyager 1 and Voyager 2 spacecraft revealed that Saturns rings are made mostly of water ice and the ring system extends hundreds of thousands of kilometers from the planet, however surprising, the vertical depth is typically only about 10 m (30 feet) in the main rings.Saturns Moons. The largest moon, Titan, is a bit bigger than the planet Mercury (Titan is the second-largest moon in the solar system only Jupiters moon Ganymede is bigger.) Titan is so large that it affects the orbits of other near-by moons. At 5,150 km (3,200 miles) across, it is the second largest moon in the solar system. Titan hides its surface with a thick nitrogen-rich atmosphere. Titans atmosphere is similar to the Earths atmosphere of long ago, before biology took hold on our home planet and changed the composition from carbon dioxide to oxygen. Titans atmosphere is approximately 95% nitrogen, 3% helium with traces of methane. While the Earths atmosphere extends about 60 km (37 miles) into space, Titans extends nearly 600 km (ten times that of the Earths atmosphere) into space.The moon Iapetus has one side as bright as snow and one side as dark as black velvet, with a huge ridge running around most of its dark-side equator. Phoebe is odd as the moon orbits the planet in a direction opposite that of Saturns larger moons, as do several of the more lately discovered moons. The result of an impact that nearly split the moon Mimas apart has an enormous crater on one side providing evidence that the solar system still contains left-over debris and can cause substantial impac ts. The probe Cassini observed warm fractures on Enceladus where evaporating ice clearly escapes and forms a huge cloud of water vapor over the South Pole. Scientists have seen evidence of active ice volcanism on Enceladus. Hyperion has an odd flattened shape and rotates chaotically, probably due to a recent collision, and probably due to the space junk being tossed out from the ring-system due to collisions there. The moon Pan orbits within the main rings and helps sweep materials out of a narrow space known as the Encke Gap (have to do a better job of sweeping with the many impacts on-going.) Finally, Tethys has a huge rift zone called the Ithaca Chasma that runs nearly three-quarters of the way around the moon.Four additional moons orbit in stable places around Saturn they tag along with their larger sisters. These moons lie 60 degrees ahead of or behind a larger moon and in the same orbit. Telesto and Calypso move along with the larger moon Tethys in its orbit Helene and Polydeu ces occupy similar orbits with Dione. A collision with any of these smaller moons within the same orbit can cause catastrophic consequences with Saturns larger moons. Uranus is following as our probe moves on from Saturn.J. Uranus This strange upside-down world is 19.6 AU from the sun, and at 14 Earth masses, has a mass of 8.68 E25 kg with a mean density of 1,290 kg/m3. Uniquely among the planets is the only gas-giant whose equator is nearly at right angles to its orbit (its axial tilt is over ninety degrees to the eclip

Corellis Mandolin by Louis de Bernieres Essay examples -- Corellis M

Corellis Mandolin by Louis de BernieresCarlo was fighting for Italy, while Mandras was in the Greek army. Both of the characters experienced a sell during the war. that everythingMandras and Carlo fought on opposite sides. What does it say active thenovels moral scheme, that the sufferings of ordinary muckle on bothsides are recounted in detail? Consider these dickens characters but alsoother moral issues raised in the novel so far.Mandras and Carlo fought on opposite sides. Their experiences andfeelings through out the war are recounted to the readers in a lot ofdetails. And even though they were enemies, their stories are verysimilar, as if the author is talking nearly the same man. This style ofnarration make knowns us something or so the moral scheme of the novel. DeBernieres is trying to show the readers that there is no differencebetween human beings. That they all share similar feelings and havesimilar ideas about life. However similarity between people is not theonly moral issue that is being raised, the author also raises thequestion about religion, education, sufferings and of course of love.In this essay I will primarily discuss the similarities betweenpeople, concentrating mostly on the two main characters Carlo andMandras. And then I will talk about the other moral issues raised inthe novel so far.Carlo was fighting for Italy, while Mandras was in the Greek army.Both of the characters experienced a lot during the war. Neverthelesseverything that has happened to them is very similar. First of all,both of the characters had a completely wrong impression of what waris like. They both believed that it was something glorious, somethingworthwhile. Carlo wa... ...vive if a person doesnt have a soul, all the same the souls of soldiers diminished to a tiny point of greylight. They no longer believed as they saw all the sufferings of thepeople, which in the end were useless. Instead of praying to God, theystarted praying to the people they loved, as they believed that unlikeGod their beloved ones wouldnt forget them. I had you instead of theVirgin, I even prayed to you. (p.157). During the war, the soldierscompletely lost their faith and hope. So as we can see the role ofreligion in peoples lives is also an important moral issue that israised in the novel.All of these factors tell us that there are several different moralschemes in the novel. And the development of each issue depends on thesituation that the person is in, and not on the person himself, as inthe end all the humans are very similar.

Neuroenhancers: Are they the answers for our problems? Essay -- Health

In the article, Brain Gain by Marg atomic number 18t Talbot, it illustrates the growing underground world of neuroenchancing drugs. In her article, she writes about more(prenominal) and more race are taking neuroenhancers to improve their cognitive functions. People are taking neuroenhancers because they feel pressure to compete and perform well in this stressful society. Talbots articles shows how this society has become so obsessed with efficiency and is so competitive that they are making justifiable reasons to take these neuroenhancers. These neuroenhancers are drugs that supposed to be utilize by people who suffer from cognitive disorders. The use of neuroenhancers for competitive gain is wrong on so many levels. It is unethical, and causes physical and philosophical risks. These risks outweigh the capableness gains of these neuroenhancers.The use of neuroenhancers for competitive gain, not for treatment of a disorder is unethical. Neuroenhancers like Adderall and Ritalin ar e used to treat a people disorder that disrupts their prevalent cognitive functions and are suffering from serious cognitive disorders. (Talbot 2) Now more and more over-committed people are taking these drugs to become higher functioning and more committed. (Talbot 2) They are taking these drugs to make the impossible to the possible. Also, these drugs are used by people who wasted their time too busy partying and engaging in activities that are detrimental to their performances. They are too busy partying and being high that they use these neuroenhancers drugs to make up for their fun. (Talbot 2) They are too busy participating in otherwise activities that they neglect their academic work which is the purpose of college. These students are cheating and using these drugs to get ... ...n life that they have to be on smart drugs. Also, this society is incessantly putting the image of perfection into peoples head. Thanks to this societal pressure there are demands for drugs like A dderall. Neuroenhancers are not the answers of our problems. Neuroenhancers are wild at so many levels. It causes physical, mental and philosophical harm. They are used by lazy people who have poor time management skills and who doesnt want to do hard work. This shows how much our society has fallen. It resorted to drugs to make life easier. No one wants to make sacrifices or put hours of hard work. They want everything delivered to them. They put one acrosst care what are the neuroenhancers are doing to their body. They feel the award is worth the risk. Hopefully users will realize what are they doing and stop using neuroenhancers before their health are negatively affected.