The Treasure of the City of Ladies by Christine de Pisan Essay

The Treasure of the City of Ladies by Christine de Pisan Christine de Pisan’s book, The Treasure of the City of Ladies, explains in detail the various aspects of women’s lives during the late Medieval and Renaissance culture. She addresses all women of this time from those with power and authority to the poorest peasant women. Christine de Pisan focuses on three main areas of a women’s life during this time period. First she discusses the role of knowledge and education in the lives of the various women. Then she offers her advice to all the different women of varied backgrounds and social standards. She relates how all of these women are in fact connected due to common concerns. Finally, she depicts how men and women interact with one another. By describing the way in which women are treated by the men during this time, she portrays the typical relationship between men and women during Renaissance times. Women were expected to lead a very specific life, focusing on the men of their society. Throughout Christine de Pisan’s book, she refers to the three ladies of Virtue: Reason, Rectitude, and Justice. These ladies are the foundations of her teachings. She uses them to explain the relationship between men and women and how they view one another. The lady Prudence teaches all the women of that society about the â€Å"rules† they should follow in order to be good Renaissance women, specifically in their relations with men. â€Å"Now we would like to advance for their edification seven principal teachings, which according to Prudence are necessary to those who desire to live wisely and wish to have honour† (62). These teachings say that the women should love their husbands; they should live in peace with men. If they f... ...d the chance to lead a respectable life according to the â€Å"rules† of the ladies of Virtue. In the late Medieval and Renaissance time period, women had a strict standard to live up to. They should love their husbands, respect them, and obey their commands. The men in return fulfilled the women’s needs by supplying them with whatever they needed. The men and women lived with a mutual respect between themselves. Works Cited Author: Christine, de Pisan, ca. 1364-ca. 1431 Uniform Title: Livre des trois vertus. English Title: The treasure of the city of ladies, or, The book of the three virtues / Christine de Pisan ; translated with an introduction by Sarah Lawson. Published: Harmondsworth, Middlesex, England ; New York, N.Y., U.S.A. : Penguin, 1985. ISBN: 014044453X (pbk.)

Native Americans Essays -- essays research papers

Native Americans culture is unique for many ways. Living on the reservations they were in touch with nature as well as their ancestors. Native Americans are disputed in the country, diverse among tribes, culturally mixed, and recognize their own political stands (Bordewich, 1996, p. 71). These have changed over the years, but before the reconstruction of the Native Americans the people were identifiable and knew who they were. Before the Europeans came and changed their living they felt one with the land. They believe the land was not to be owned by anyone. The Wakon’da, a god, who in there words related to all things, made the land. Also, they expressed their feelings for nature as in peace confidence. Before the ‘whites’ took over the land the Native Americans had their own laws, as they do know, but one of the most important laws was to respect and keep peace with the dominant race and others around them. This meaning the Natives had never wanted to start fighting with the other races (Brophy, 1966, p. 24-25). They wanted to keep to themselves and keep the land clean and healthy. They did everything in and for nature.   Ã‚  Ã‚  Ã‚  Ã‚  The Indian dances were a spiritual way for the Indians to express themselves. Handed down from generation to generation the dances are not a form of their own movement. They do the steps of the ancestors exceptionally in the religious ceremony dances. The only time a dancer will go outside of the steps is when it’s a personal ex...

Media Controls Your Mind

Media Controls Your Mind The media has a greater effect on America's popular culture than most people realize. Americans are always â€Å"plugged in,† and our access to media has a greater effect on our choices than ever before. People must learn that Just because something is being reported in the media does not mean it is true. This lesson goes all the way back to the beginning of â€Å"modern media,† starting with the television. One cannot trust everything he sees being advertised.Most advertisements are overly exaggerated and sometimes manipulative, Just to persuade consumers to buy a product, vote a certain way, or believe in a certain thing. For instance, in the 1930s America's first â€Å"drug czar† Harry J. Anslinger began one of the world's greatest public relations campaigns to demonize marijuana by telling apparent lies to society, such as marijuana is more harmful to the body than alcohol and tobacco. Seventy years later people still believe the lies even after decades of scientific proof.Because media can have significant influences on our opinions, the American public as a whole need to be more aware of it on a daily basis. The media has a responsibility to use only truthful explanations as opposed to exaggeration when arguing against the egalization of marijuana. The campaigns that Anslinger designed consisted of many movies, musicals, and advertisements, all aimed at demonizing the usage of marijuana. His main argument against the use of marijuana was that smoking it could drive a person insane. Every single one of his claims omitted some very important facts, which made the advertisements misleading.Study after study over the years has proved that marijuana is way less dangerous than alcohol or tobacco, and it is not a â€Å"gateway drug† leading to the usage of other drugs. For example in the article posted by Paul Armentano he says, â€Å"In the United States alone, an estimated 79,000 lives are lost annually due to excessive drinking. † Anslinger promoted these false claims to the general public for the sole reason of making sure that marijuana remained illegal. He even tried to say that a kid from Florida killed his father, mother, two brothers, and sister was due to his newly formed habit of smoking marijuana.That was a very far- fetched claim, even for those who supported keeping marijuana illegal. But, it did stick with a vast majority of people, and to this day marijuana is still illegal in almost every state. However, the longstanding tradition of keeping it illegal is slowly changing. As of the most recent election, there are eighteen states in the U. S. that have legalized the plant for medicinal usage, and two states, Washington and Colorado, have recently legalized the recreational usage of the plant as well.One would think after 70 years of proven studies on marijuana that more states would have made efforts to legalize marijuana by now. Keeping marijuana illegal due to it s â€Å"dangerous† effects seems especially hypocritical, in light of the fatalities that are associated with alcohol and tobacco use every year. Four percent of all deaths in America annually are due to the consumption of alcohol. To this day there has not Magazine â€Å"No one has ever died of THC [marijuana] poisoning, mostly because a 160- lb. person would have to smoke roughly 900 Joints in a sitting to reach a lethal dose. In light of that statistic, it is astonishing that alcohol is used so casually every day by millions of people, yet marijuana remains illegal. In my opinion I think that alcohol should be illegal not cannabis. The mass media should be obligated to present factual information and not over exaggerate claims on behalf of marijuana, because he public needs to know the truth. Every citizen has the right to unbiased, truthful information, and we should be able to trust the media to give this information to us.One of the 1930 anti-mariJuana advertisements t hat was particularly inaccurate was an advertisement with images degrading anything associated with marijuana. It showed a devil in the background with the weasel words â€Å"sin,† â€Å"vice,† â€Å"insanity,† and ‘degradation† scattered around the fgure. It also has a Joint in the middle with the words â€Å"the smoke of hell†. That is obviously promoting exaggerated and inaccurate nformation to someone who has not been able to get both sides of the story. Back when this advertisement was made the â€Å"Ethos† portrayed would be a lot different nowadays..In the 1930s that ad had Just enough credibility to the average citizen to persuade them to agree because a majority of the popular culture was not educated on the subject. A person uneducated on the subject will be easily persuaded into believing that marijuana is dangerous, without understanding the full picture. Using the devil's image to promote anti-mariJuana beliefs is like usin g God's image when selling a product. If one has to use either of those images in an advertisement, he must be really desperate to sell or promote something because there are a lot of other less suggestive images that could be used.However, the message to refrain from smoking marijuana is not completely inaccurate either, especially in states where it remains illegal. A good reason to stay away from marijuana is that it is simply illegal, and no one wants to go to Jail. Other people believe that cannabis should only be used if it is absolutely needed for medicinal reasons. Smoking cannabis impairs your ability to function normally and do daily activities, such as driving. The effects are not as strong as alcohol but can still be enough to be considered being impaired.The effects of smoking tobacco are more minor than the effects of alcohol and marijuana, and therefore daily use of the product is more acceptable. Even though it may cause long-term health effects, cigarettes can be sm oked daily without causing any harm to other people. It is understandable why these products are still legal in the United States, because it is hard to change the law after many years of selling the product. Our government would lose a lot of money if either alcohol or tobacco were illegal because of the pecial tax that many states levy on cigarettes.And the government is mainly focused on clearing their debt, and that would be detrimental towards the economy. They also provide thousands of Jobs to citizens. The alcohol and tobacco industries contribute significant tax revenues to the federal, state, and local governments. In conclusion, the choice to support the legalization of marijuana is influenced by many factors, including religion, family, and values. However, it is also influenced by the media and the media's portray of marijuana as a dangerous substance.If the edia is going to play such an important role in affecting our choices, it should have mass media did not realize t hat what is shown to the popular culture on a daily basis could be so influential no matter how untruthful the advertisements might be. It is not fair for the government to know more information than society. So to be able to instill truthfulness the mass media cannot promote exaggerated claims like the one I mentioned earlier. Once an advertisement is out there, there is no getting it back. The media should be responsible for promoting truthful claims to society so that we an all prosper in life like we all should.Work Cited â€Å"Legal history of cannabis in the United States. † www. wikipedia. com. Wikipedia, 02 2012. web. 5 NOV 2012. Lutz, William. â€Å"With These Words, I Can Sell You Anything. † Exploring Language. pg. 207-215. print. O'neil, Tom. â€Å"The Language of Advertising. † Exploring Language. pg. 207-215. Print. Miller, Scott. â€Å"History of Marijuana. † www. newslinetheatre. com. N. p. , n. d. Web. Wilson, Jacque. â€Å"The Highs and Lows of Using Marijuana. † kvue. com. CNN, Nov 1 1, 2012 Explain To Me Again Why Pot Is Illegal?. † norm. org. NOVI 2011.

Steel Design

STEEL BEAM DESIGN Laterally Unrestrained Beam Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 1 Non-dimensional slenderness Beam behaviour analogous to yielding/buckling of columns. M Wyfy Material yielding (in-plane bending) MEd MEd Elastic member buckling Mcr Lcr 1. 0 Dr. A Aziz Saim 2010 EC3 Non-dimensional slenderness Unrestrained Beam ? LT 2 Lateral torsional buckling Lateral torsional buckling Lateral torsional buckling is the member buckling mode associated with slender beams loaded about their major axis, without continuous lateral restraint.If continuous lateral restraint is provided to the beam, then lateral torsional buckling will be prevented and failure will occur in another mode, generally in-plane bending (and/or shear). Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 3 Eurocode 3 Eurocode 3 states, as with BS 5950, that both crosssectional and member bending resistance must be verified: MEd ? Mc ,Rd Cross-section check (In-plane bending) MEd ? Mb,Rd Dr. A Aziz Saim 2010 EC3 Unr estrained Beam Member buckling check 4 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 5 Laterally Unrestrained BeamThe design of beam in this Lecture 3 is considering beams in which either no lateral restraint or only intermittent lateral restraint is provided to the compression flange Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 6 Lateral Torsional Buckling Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 7 Lateral Torsional Buckling Figure 3-1 shows an unrestrained beam subjected to load increment. The compression flange unrestrained and beam is not stiff enough. There is a tendency for the beam to deform sideways and twist about the longitudinal axis. The failure mode which may occur to the beam is called lateral torsional buckling.Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 8 ?Involves both deflection and twisting rotation ?Out-of plane buckling. Bending Resistance M c, Rd ? M pl ? W pl f y ?M0 Due to the effect of LTB, the bending resistance of cross section become less. Failure may occurs earlier then expected Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 9 Examples of Laterally Unrestrained Beam Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 10 Restrained Beam Comparsion Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 11 Intermittent Lateral Restrained Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 12Torsional restraint Usually both flanges are held in their relative positions by external members during bending. May be provided by load bearing stiffeners or provision of adequate end connection details. See Figure 3-4. Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 13 Beam without torsional restraint Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 14 Can be discounted when: †¢ Minor axis bending †¢ CHS, SHS, circular or square bar †¢ Fully laterally restrained beams †¢ ? LT< 0. 2 (or 0. 4 in some cases) – Unrestrained length Cross-sectional shape End restrained condition The moment along the beam Loading – tension or compression Unrestrained Beam 16Dr. A Azi z Saim 2010 EC3 Lateral torsional buckling resistance Checks should be carried out on all unrestrained segments of beams (between the points where lateral restraint exists). Lateral restraint Lateral restraint Lcr = 1. 0 L Lateral restraint Beam on plan Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 17 Three methods to check LTB in EC3: †¢ The primary method adopts the lateral torsional buckling curves given by equations 6. 56 and 6. 57, and is set out in clause 6. 3. 2. 2 (general case) and clause 6. 3. 2. 3 (for rolled sections and equivalent welded sections). The second is a simplified assessment method for beams with restraints in buildings, and is set out in clause 6. 3. 2. 4. †¢ The third is a general method for lateral and lateral torsional buckling of structural components, given in clause 6. 3. 4. Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 18 Eurocode 3 states, as with BS 5950, that both cross-sectional and member bending resistance must be verified: MEd ? Mc ,Rd Cros s-section check (In-plane bending) MEd ? Mb,Rd Dr. A Aziz Saim 2010 EC3 Unrestrained Beam Member buckling check 19 Lateral-torsional buckling Eurocode 3 design approach for lateral torsional buckling is analogous to the olumn buckling treatment. The design buckling resistance Mb,Rd of a laterally unrestrained beam (or segment of beam) should be taken as: Mb,Rd ? ?LT Wy fy ? M1 Reduction factor for LTB Lateral torsional buckling resistance: Mb,Rd = ?LT Wy fy ? M1 Equation (6. 55) Wy will be Wpl,y or Wel,y ?LT Dr. A Aziz Saim 2010 EC3 is the reduction factor for lateral torsional buckling Unrestrained Beam 21 Buckling curves – general case (Cl 6. 3. 2. 2) Lateral torsional buckling curves for the general case are given below : (as in Eq (6. 56)) ?LT ? 1 2 ? LT ? ?LT ? ?2 LT but ? LT ? 1. 0 ?LT ? 0. 5 [ 1 ? ?LT (? LT ? 0. ) ? ?2 ] LT Plateau length Imperfection factor from Table 6. 3 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 22 Imperfection factor ? LT Imperfection factors ? LT for 4 buckling curves: (refer Table 6. 3) Buckling curve Imperfection factor ? LT a 0. 21 b 0. 34 c 0. 49 d 0. 76 Buckling curve selection For the general case, refer to Table 6. 4: Cross-section Rolled I-sections Welded Isections Limits h/b ? 2 h/b > 2 h/b ? 2 h/b > 2 – Buckling curve a b c d d Other crosssections Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 24 LTB curves 4 buckling curves for LTB (a, b, c and d) 1. 2 Reduction factor ? LT . 0 0. 8 0. 6 0. 4 0. 2 0. 0 0 0. 5 1 1. 5 Curve a Curve b Curve c Curve d 2 2. 5 0. 2 Dr. A Aziz Saim 2010 EC3 Non-dimensional slenderness Unrestrained Beam ?LT 25 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 26 lateral torsional buckling slenderness ? LT Mcr ? Wy f y Mcr Elastic critical buckling moment Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 27 Non-dimensional slenderness †¢ Calculate lateral torsional buckling slenderness: ? LT ? Wy f y Mcr †¢ Buckling curves as for compression (except curve a0) †¢ Wy depends on section classification †¢ Mcr is the elastic critical LTB moment Dr. A Aziz Saim 2010 EC3Unrestrained Beam 28 BS EN 1993-1-1 does not give a method for determining the elastic critical moment for lateraltorsional buckling Mcr !!!!!!!! May use ‘LTBeam’ software (can be downloaded from CTICM website) Or may use method presented by L. Gardner †¦Ã¢â‚¬ ¦. Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 29 Mcr under uniform moment For typical end conditions, and under uniform moment the elastic critical lateral torsional buckling moment Mcr is: Mcr ,0 G IT Iw Iz Lcr ? EIz ? 2 Lcr 2 ? Iw Lcr GIT ? ? ? 2 ? ? EIz ? ? Iz 2 0. 5 is the shear modulus is the torsion constant is the warping constant is the inor axis second moment of area is the buckling length of the beam Unrestrained Beam 30 Dr. A Aziz Saim 2010 EC3 Mcr under non-uniform moment Numerical solutions have been calculated for a number of other loading conditions. For uniform doubly-symmetric cross-sections, loaded through the shear centre at the level of the centroidal axis, and with the standard conditions of restraint described, Mcr may be calculated by: ? EIz Mcr ? C1 2 Lcr 2 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam ? Iw Lcr GIT ? ? ? 2 ? ? EIz ? ? Iz 2 0. 5 31 C1 factor – end momentsFor end moment loading C1 may be approximated by the equation below, though other approximations also exist. C1= 1. 88 – 1. 40y + 0. 52y2 but C1 ? 2. 70 where y is the ratio of the end moments (defined in the following table). Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 32 C1 factor – transverse loading Loading and support conditions Bending moment diagram Value of C1 1. 132 1. 285 1. 365 1. 565 1. 046 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 33 Design procedure for LTB Design procedure for LTB: 1. Determine BMD and SFD from design loads 2. Select section and determine geometry 3. Classify cross-section (Class 1, 2, 3 or 4) 4.Determine effective (buckling) length Lcr – depends on bounda ry conditions and load level 5. Calculate Mcr and Wyfy Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 34 Design procedure for LTB 6. Non-dimensional slenderness ? LT ? Wy fy Mcr 7. Determine imperfection factor ? LT 8. Calculate buckling reduction factor ? LT 9. Design buckling resistance 10. Check Mb,Rd ? ?LT Wy fy ? M1 MEd ? 1. 0 Mb,Rd for each unrestrained portion Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 35 LTB Example General arrangement Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 36 LTB Example Design loading is as follows: 425. 1 kN A B C 319. 6 kN D 2. 5 m 3. 2 m 5. 1 mLoading Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 37 LTB Example 267. 1 kN A B D 52. 5 kN SF C 477. 6 kN Shear force diagram B A C D BM 1194 kNm 1362 kNm Bending moment diagram Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 38 LTB Example For the purposes of this example, lateral torsional buckling curves for the general case will be utilised. Lateral torsional buckling checks to be carried out on segments BC and CD. By inspection, segment AB is not critical. Try 762? 267? 173 UB in grade S 275 steel. Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 39 LTB Example b z tw h d y y r z tf h = 762. 2 mm b = 266. 7 mm tw = 14. 3 mm tf = 21. 6 mm r = 16. mm A = 22000 mm2 Wy,pl = 6198? 103 mm3 Iz = 68. 50? 106 mm4 It = 2670? 103 mm4 Iw = 9390? 109 mm6 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 40 LTB Example For a nominal material thickness (tf = 21. 6 mm and tw = 14. 3 mm) of between 16 mm and 40 mm the nominal values of yield strength fy for grade S 275 steel (to EN 10025-2) is 265 N/mm2. From clause 3. 2. 6: N/mm2. E = 210000 N/mm2 and G ? 81000 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 41 LTB Example Cross-section classification (clause 5. 5. 2): e ? 235 / fy ? 235 / 265 ? 0. 94 Outstand flanges (Table 5. 2, sheet 2) cf = (b – tw – 2r) / 2 = 109. 7 mm cf / tf = 109. 7 / 21. 6 = 5. 8 Limit for Class 1 flange = 9e = 8. 48 > 5. 08 ? Flange is Class 1 Dr. A Aziz Saim 2010 EC3 Unrestrained Bea m 42 LTB Example Web – internal part in bending (Table 5. 2, sheet 1) cw = h – 2tf – 2r = 686. 0 mm cw / tw= 686. 0 / 14. 3 = 48. 0 Limit for Class 1 web = 72 e = 67. 8 > 48. 0 ? Web is Class 1 Overall cross-section classification is therefore Class 1. Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 43 LTB Example Bending resistance of cross-section (clause 6. 2. 5): Mc ,y,Rd ? Wpl,y fy ? M0 for Class 1 and 2 sec tions 6198 ? 103 ? 265 ? ? 1642 ? 106 Nmm 1. 0 ? 1642 kNm ? 1362 kNm ? Cross-section resistance in bending is OK.Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 44 LTB Example Lateral torsional buckling check (clause 6. 3. 2. 2) – Segment BC: MEd ? 1362 kNm Mb ,Rd ? ? LT Wy fy ? M1 where Wy = Wpl,y for Class 1 and 2 sections Determine Mcr for segment BC (Lcr = 3200 mm) Dr. A Aziz Saim 2010 EC3 ? EIz Mcr ? C1 2 Lcr 2 ? Iw Lcr GIT ? ? ? 2 ? ? EIz ? ? Iz Unrestrained Beam 2 0. 5 45 LTB Example For end moment loading C1 may be approximated from: C1 = 1. 88 â⠂¬â€œ 1. 40y + 0. 52y2 but C1 ? 2. 70 1194 y is the ratio of the end moments ? ? 0. 88 1362 ? C1 ? 1. 05 ? 2 ? 210000 ? 68. 5 ? 106 Mcr ? 1. 05 ? 32002 ? 9390 ? 109 32002 ? 81000 ? 2670 ? 103 ? ? ? 68. 5 ? 106 ? 2 ? 210000 ? 68. 5 ? 106 ? ? 0. 5 = 5699Ãâ€"106 Nmm = 5699 kNm Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 46 LTB Example Non-dimensional lateral torsional slenderness for segment BC: ? LT ? Wy fy Mcr 6198 ? 103 ? 265 ? ? 0. 54 6 5699 ? 10 Select buckling curve and imperfection factor ? LT: From Table 6. 4: h/b = 762. 2/266. 7 = 2. 85 For a rolled I-section with h/b > 2, use buckling curve b Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 47 LTB Example From Table 6. 3 of EN 1993-1-1: For buckling curve b, ? LT = 0. 34 Calculate reduction factor for lateral torsional buckling, ? LT – Segment BC: ?LT ? 1 ? LT ? ? 2 LT LT but ? LT ? 1. 0 where ? LT ? 0. 5 [ 1 ? ?LT (? LT ? 0. 2) ? ?2 ] LT Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 48 LTB Example ?LT = 0. 5[1+0. 34(0. 54-0. 2) + 0. 542] = 0. 70 ? ? LT ? 1 0. 70 ? 0. 70 ? 0. 54 2 2 ? 0. 87 Lateral torsional buckling resistance Mb,Rd – Segment BC : Mb,Rd ? ? LT Wy fy ? M1 265 ? 0. 87 ? 6198 ? 10 ? 1 . 0 3 ? 1425 ? 106 Nmm ? 1425 kNm Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 49 LTB Example MEd 1362 ? ? 0. 96 ? 1. 0 ? Segment BC is OK Mb,Rd 1425 Lateral torsional buckling check (clause 6. 3. 2. 2) – Segment CD: MEd ? 1362 kNm Mb ,Rd ? ? LT Wy fy ? M1 where Wy = Wpl,y for Class 1 and 2 sectionsDetermine Mcr for segment CD (Lcr = 5100 mm) Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 50 LTB Example ? EIz Mcr ? C1 2 Lcr 2 ? Iw Lcr GIT ? ? ? 2 ? Iz ? EIz ? ? 2 0. 5 Determine y from Table: 0 y is the ratio of the end moments ? ?0 1362 ? C1 ? 1. 88 ? 2 ? 210000 ? 68. 5 ? 106 Mcr ? 1. 88 51002 ? 9390 ? 109 51002 ? 81000 ? 2670 ? 103 ? ? ? ? 68. 5 ? 106 ? 2 ? 210000 ? 68. 5 ? 106 ? ? 0. 5 = 4311? 106 Nmm = 4311 kNm Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 51 LTB Example Non-dimensional lateral torsio nal slenderness for segment CD: ? LT ? Wy fy Mcr 6198 ? 103 ? 265 ? ? 0. 62 6 4311? 10 The buckling curve and imperfection factor ?LT are as for segment BC. Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 52 LTB Example Calculate reduction factor for lateral torsional buckling, ? LT – Segment CD: ?LT ? 1 ? LT ? ? 2 LT 2 LT but ? LT ? 1. 0 where ? LT ? 0. 5 [ 1 ? ?LT (? LT ? 0. 2) ? ?2 ] LT = 0. 5[1+0. 34(0. 62-0. 2) + 0. 622] = 0. 76 ? ? LT Dr. A Aziz Saim 2010 EC3 ? 1 0. 76 ? 0. 76 ? 0. 62 2 Unrestrained Beam 2 ? 0. 83 53 LTB Example Lateral torsional buckling resistance Mb,Rd – Segment CD : Mb,Rd ? ?LT Wy fy ? M1 265 ? 0. 83 ? 6198 ? 10 ? 1. 0 3 ? 1360 ? 106 Nmm ? 1360 kNm MEd 1362 ? ? 1. 00 Mb,Rd 1360 Segment CD is critical and marginally fails LTB check.Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 54 Blank Page Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 55 Simplified assessment of ? LT For hot-rolled doubly symmetric I and H sections without destabilising loads,? may be conservatively simplified to: LT ? LT ? 1 0. 9 ? z ? C1 ?z 1 0. 9 ? 1 C1 E ? z ? L / iz ; ? 1 ? ? fy As a further simplification, C1 may also be conservatively taken = 1. 0. Simplified assessment of ? LT Substituting in numerical values for simplified expressions result. ? 1 , the following S235 ? LT ? 1 L / iz C1 104 S275 ? LT ? 1 L / iz C1 96 S355 ? LT ? 1 L / iz C1 85 C1 may be conservatively taken = 1. , though the level of conservatism increases the more the actual bending moment diagram differs from uniform moment. Simplified method (Cl. 6. 3. 2. 4) Simplified method for beams with restraints in buildings (Clause 6. 3. 2. 4) This method treats the compression flange of the beam and part of the web as a strut: b b Compression h Tension Compression flange + 1/3 of the compressed area of web Strut Dr. A Aziz Saim 2010 EC3 Beam Unrestrained Beam 58 General method (Cl. 6. 3. 4) General method for lateral and lateral torsional buckling of structural components †¢ May be applied to single members, plane frames etc. Requires determination of plastic and elastic (buckling) resistance of structure, which subsequently defines global slenderness †¢ Generally requires FE Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 59 Blank Page Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 60 Important Notes: (End Connections) When full torsional restraint exist: -both the compression and tension flanges are fully restrained against rotation on plan -both flanges are partially restrained against rotation on plan – both flanges are free to rotate on plan Unrestrained Beam 61 Dr. A Aziz Saim 2010 EC3 Connection DetailDr. A Aziz Saim 2010 EC3 Unrestrained Beam 62 Important Notes: (End Connections) Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 63 Important Notes: (End Connections) When both flanges are free to rotate on plan and the compression flange is unrestrained: i. torsional restraint is provided solely by connection of the tension flange to the supports, ii. torsional re straint is provided solely by dead bearing of the tension flange on support. Unrestrained Beam 64 Dr. A Aziz Saim 2010 EC3 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 65 Dr. A Aziz Saim 2010 EC3 Unrestrained Beam 66

Jonathan Swift and Piers Paul Read Essay

Cannibalism is the last taboo. In ‘Alive’ and ‘A Modest Proposal’ Jonathan Swift and Piers Paul Read approach the subject with completely different purposes in mind. What do you consider to be the purpose of each author, and say how he achieves this? A Modest Proposal is a scathing attack on the economic oppression of the Irish by the English. During Swift’s lifetime tremendous suffering was caused by English practices in Ireland. However, it is incorrect to say that cannibalism is the theme of ‘A Modest Proposal. ‘ Swift was a Protestant writer in Ireland at the time of The Great Potato Famine. The article is a clever satirical device to draw attention to the plight of the poor. He infiltrates the opposition, the rich Protestant landlords, in order to put their torturous ideas to ridicule. Swift attacks his own Protestant, English community by creating a narrator who considers himself a reasonable and compassionate character, but one who combines a repulsive anti-Catholic bigotry, with a ‘modest’ proposal, that is, rather, a ‘final solution’: he, the narrator, advocates cannibalism as a means of countering Irish Catholic poverty abortion, and the high birth rate. The narrator, in a frighteningly rational and level-headed tone condemns the English for being inhumane, the Irish for being passive, the speaker for being morally blind, and the reader for accepting intolerable situations in the world around him; for this piece was accepted and believed by many, at the time. On the other hand, Piers Paul Read, in his biographical ‘novel’ ‘Alive, rather than indirectly giving answers to a problem, asks questions. He tells of the experiences of the survivors of an Andean plane crash in 1976, who, in the remoteness, and the harshness of their environment, the lack of a consumable source of food, and the quickening exhaustion of their own limited amounts of chocolate and wine, have no where to turn except, in their desperation, to eat the meat from their fellow, dead, company. They have only their plane’s wreckage as shelter, which has come down from 14,000 feet. Both literary pieces, although their purpose, style and audience are different, jolt the reader out of their complacency, and encourage them to think of things they thought weren’t necessary to be thought about! However, it is necessary to understand that the two texts have been written hundreds of years apart, and society, of course, has evolved. Swift has reached out across the religious and ethnic divide to champion the ignorant, impoverished Irish Catholics. The bigotry of Swift’s narrative is so convincing and grotesque, that Swift himself is sometimes mistaken as his narrator, an anti-Catholic bigot! On the contrary, Swift’s essay harshly attacks the ‘Christian’ commitment of Ireland’s wealthy Protestant absentee landowners, and his unflattering ‘cannibal’ is made in their image. P. P. Read meanwhile, attacks not the opposition, but gives a balanced and meaningful account of the plane crash and the tales that followed, and examines the human spirit to stay alive, and questions what is ‘civilized’ and ‘human. ‘ Yet, simultaneously, Read, almost in the opposite of Swift, advocates cannibalism. Read turns the views of cannibalism as a taboo on its head. Rather than associating it with savagery and being primitive and irrational, he questions logic, and seems to state that the ban is the primitive thing, that is not based on reason. In one paragraph alone, he writes, â€Å"we grappled with emotions,† and â€Å"we did not think it wrong† twice. While Swift attacks the Landlords by linking their greed to their â€Å"devouring† of the Irish Catholics, and satirizes cannibalism to the extent that it is no longer seen as ironic, only distasteful, Read, using a character ‘Canessa’, reasons cannibalism out. He talks of nourishment and energy, and of course, eventually wins his company. Their decision is based on logic and reason, and the ability to use these makes us civilized. Although I do not feel that Swift’s narrator’s views are plausible, Read using a variety of effective techniques, convinces the reader. Swift shows how the English projected their own blame onto their victims- destitute Irish Catholics, that, Swift suggests, have been ‘cannibalized’ by the rapacious greed of absentee landlords. Swift is hoping to shame them into being more compassionate. However, as what happened when I read it for the first time, because Swift and his narrator are so tightly intertwined, readers often emerge from their reading, confused, perhaps unable to take in the implausibility of his case.

How can Ebola affect us Essay

Imagine being isolated from your own family and feeling unsure as to whether or not you will ever see them again. They do not want to come anywhere near you, for you are a threat to their health. The only visitors who come within 10 feet of you are strangers in full on protective gear. They do not want to expose the slightest bit of skin to you and you cannot see anything besides their eyes. The world fears what you are and no one wants to come close to you. You know death is near, and you are all alone. You can see the mountain of corpses outside the wiry mesh window of your facility, being burnt and thrown into mass graves, and you know that you will soon be joining them. This is the life of an Ebola victim.. In the year 1976, Ebola climbed out of its unknown hiding place, and caused the death of 280 out of the 318 people who got infected. That’s an 88% fatality rate. Fear gripped the victims, and tortured their minds. The people of Zaire waited outside clinics, churches and in their homes for a treatment of the horrible disease, but there was no cure. They were forced to watch people die, hoping that they would be saved from the violent death of the Ebola virus. From the year of 1976 till today, researchers have searched for origin and cure of the virus. Scientist have carried out numerous studies and investigations, but no one has been able to find the right explanations. There have been many others out breaks in the past but 2014/15’s outbreak has claimed more lives than all of these other outbreaks together, with a staggering 8386 death and counting. It has also spread between countries starting in Guinea then spreading across land borders to Sierra Leone calming 3,049 lives and Liberia causing 3,515 deaths and to to Nigeria causing 8 deaths. It is believed that the Ebola  virus may have initially been transmitted to humans from bats, and other forms of bush meat like monkeys ect.. fro m the jungles in central Africa, i know it must sount crazy to you to hear that some people eat monkeys but In some remote areas of Africa it is part of their culture and their way of life. In Africa’s Congo Basin, people eat an estimated five million tonnes of bush meat per year. The reason that bush meat is so deadly is because some animals mostly bats, can be a host to specific diseases without being harmed, were as us humans cannot carry these diseases without becoming infected. When a person contracts Ebola they will start to feel the symptoms within the next 2-21 days. The symptoms of Ebola are very distinctive and deadly. If you were to contract Ebola, your experience would be horrific you would start to get bad stomach pains, but it would just be passed off as a common bug. after that they would then start to amplify in pain until they would wake you up from your sleep, which would be followed by chronic vomiting. Anything you ate would come back up. These symptoms would continue for a few days then you would start to lose weight at an extreme rate. Chest pains would now accompany the stomach aches, by this time you would be very weak with virtually no food in your body due to the vomiting and your teeth would start to fall out while you would develop a bloody rash and you would die days later after horrific suffering. But those are just the side effects of what’s really happening in your body. Ebola attacks every organ and all of the tissue in the human body except the bones. You develop blood clots under the skin. Your organs turn to mush and the under layers of your skin die and liquefy; this is what causes the bloody bubbly rash. These things actually happen to Ebola patients every day. Ebola is a very contagious disease; this is why Ebola victims have to be kept contained in hospitals and treatment facilities. When it comes to transmission doctors take cleaning themselves after being in contact with an infected person very seriously. Ebola is transmitted through the passing of boldly fluids, which means if you get fluids from an infected person’s body onto your skin, you should be okay; but we as humans are constantly rubbing our eyes and eating with our hands so this means that we are still giving the Ebola parasite a chance to enter our body. At the moment there is no cure or vaccination for Ebola. Experiments however are taking place to find  a vaccination using antibodies of Ebola survivors. This is possible because like any other disease like small pocks and the chicken pox, one you have survived Ebola u become immune to it. Scientists are trying to figure out how to copy this into a vaccination. Most people in the uk think that they are completely safe from the disease, and at the moment yes they are. It is extremely unlikely that Ebola at the moment could reach the uk and spread like wildfire. However, every person in West Africa, Sierra Leone, Liberia ect that gets infected with Ebola provides it with an opportunity to grow and mutate, if not stopped it will eventually maybe in the next year, maybe in the next 10 years become air born. This means that even breathing near an Ebola patient will give u the disease. Once air born it will travel the world and could patiently kill a large percentage of the earth’s population. Including you. I hope now you can see why Ebola need stop be stopped. Thanks for listening

Electronic Evolution in Negotiability of Negotiable Instruments Essay

Electronic Evolution in Negotiability of Negotiable Instruments - Essay Example Throughout the legislative process, attention was constantly given to the areas like, Governments, banks, trading and other interested circles. The Convention applies only to international bills of exchange and international promissory notes when they comply with certain requisites of form. The use of an instrument governed by the Convention is thus entirely optional. Ratification or accession by a State does not subject all international instruments issued in that State to the legal regime of the Convention but merely opens the door for bankers and merchants to opt for this new legal regime if they deem it preferable in their professional judgment.(1) The United Nations Commission on International Trade Law Model Law on Electronic Commerce 1996 (2)is a set of rules that provides a model for reform in this context. It is recommended that the Model Law should be adopted to increase certainty in relation to the enforceability of electronic bills of exchange. The Convention defines the terms "bill of exchange" and "promissory note" and states the conditions on which a bill of exchange or promissory note is considered to be int ernational. A bill of exchange is a written instrument which contains an unconditional order whereby the drawer directs the drawee to pay a definite sum of money to the payee or to his order, on demand or at a definite time. It should be dated and it should be signed by the drawer. A promissory note is a written instrument which contains an unconditional promise whereby the maker undertakes to pay a definite sum of money to the payee or to his order; on demand or at a definite time and it should be dated and it should be signed by the maker.(3) Modern commercial practice has been influenced to a considerable degree during the years by electronics and computers in numerous ways. With all scientific developments within the business environment the pace of adjustment corresponds to a challenge to the traditional legal notions regulating patterns of trade. The development of such electronics and computers influence the instruments of trade also. Before taking peer in to the impact of such electronic evolution in negotiability of Negotiable instruments, let's have deep look into the scope of Convention on international transaction with reference to Bills of exchange and Promissory notes. Scope of the Convention In its desire to win commercial acceptance and free circulation of its instruments in international commerce, the Convention firmly upholds the principle of negotiability. The Convention considers the jurisdictions as per a