Fashion Of 16th Century Essays - 15th-century Fashion,

Fashion Of 16th Century Costume of men and women in the 16th century is said to have gone through three different phases. The styles differed quite noticeably from one phase to the next. However, the general dates that these phases took place are not the same for men and women. For men, the earliest phase was a transition from medieval styles to the styles of the Renaissance. Following this period, the German influence was prominently seen in men's fashion. Spanish influences were strong in the final phase. Between 1500 and 1515 men's basic costume consisted of linen shirts, doublets, (padded, close-fitting body garments with or without sleeves worn over the shirt) hose, codpieces, (bag or box of fabric worn to conceal the front opening of breeches) jackets, bases, gowns, cloaks, caps and/or hats. Shirts were made of white linen and cut full and gathered into a round or square neckline, often decorated with embroidery or cutwork. They had long, raglan sleeves. Doublets and hose were laced together, the doublets being only waist length. Hose were seamed into one garment with a codpiece at the front. In one version the doublet was cut with a deep V at the front, which sometimes had a filler of contrasting color inserted under the V. Laces could be used to hold the open area together, and also to hold the sleeves in place. Jackets, sometimes worn over doublets, were similar in shaping and made with or without sleeves. It is often difficult to discern from period illustrations whether men are wearing doublets or jackets as their outermost garments, especially after bases grew in popularity. Bases were short skirts worn with a jacket or doublet for civil dress; over armor for military dress. Made from a series of lined and stiffened gores (wedge-shaped pieces of fabric), bases carried on in civilian dress until well into the mid-century, and over armor for even a longer period. Gowns were long, full garments with huge funnel-shaped of large hanging sleeves that opened down the front. The front facings were made of contrasting fabric or fur and turned back to form wide, decorative revers (similar to lapels). Younger and more fashionable men wore shorter gowns, ending below the hips. Gowns were worn over doublets or jackets. Circular cloaks were worn over doublets and hose outdoors for warmth. The cloaks were open at the front with a slit up the back to make it easier to ride horseback. During this time, men cut their hair straight across the back in a length anywhere from below the ears to the shoulder and combined this with a fringe of bangs across the forehead. A few popular hat styles were French bonnets, (a pill-box shape with a turned-up brim that might have decorative cut-out sections in the brim) skull caps or hair nets holding the hair close to the head topped by a hat with a basin-shaped crown and wide brim turned up at one point. Many hats were decorated with feathers. The second phase, 1515 to 1550, emphasized fullness in the construction of the costume with large, bulky, puffed areas. Garments were ornamented with decorative slashings, (slits in a garment to show puffing of contrasting color and material to form a decoration) or panes, (slashings in material allowing colored underling to show- often embroidered) under which contrasting linings were placed. Shirts, doublets and jackets continued much as before, with the addition of slashings, as mentioned earlier. Instead of having separate bases, some doublets and jackets were cut with gored (flared) skirts. Some had no sleeves; some had wide U- or V-shaped necklines beneath which the wide neck, the doublet, and part of the shirt was often visible. Bases (short skirts) were still worn with armor. Sleeves of the outermost garment were cut very full, often with a puff from armhole to elbow and a closer fit from the elbow to the wrist. Hose were held up by lacing them to the doublets. Some were divided into two sections, upper stocks (seat part of trunk hose also known as ?overstocks' and ?breeches') and nether stocks, which were sewn together. Codpieces, the pouches of fabric for the genitals sewn at the front of the upper stocks, were sometimes padded for emphasis. Although upper stocks and nether stocks continued to be attached, upper stocks eventually took on the appearance of a separate garment, and were cut somewhat fuller than the lower section. Style variations included long breeches, fitting the leg closely and ending at the knee or more rounded breeches ending at the hip. Both

Jesus Galilean Ministry Essay Essay Example

Jesus Galilean Ministry Essay Essay Example Jesus Galilean Ministry Essay Paper Jesus Galilean Ministry Essay Paper Jesus is the one sent by God the Father from Heaven for intents of salvation of wickedness and Restoration of the lost glorification after the ruin of world. The four Gospel books brings it forth that He is the promised Messiah whose coming was prophesied by prophesier Isaiah in Isaiah 9:1-7 ( Brown. 1979 ) . He was brought up and began His ministry in Galilee which comprise of the northern parts of Palestine. Sea of Galilee and west of Jordan ( Luke 4:14-15 ) . Before he began his ministry. Jesus underwent assorted activities in readying of the public launching of the ministry. Among these things include the baptism in river Jordan by the one known to be the â€Å"Voice of the one naming from the desert. fix the manner of the Lord Messiah† . It is after this baptism when the ministry of John the Baptist is no longer seen further in the bible and besides the evidenced infilling of the Holy Spirit which enables Him in the executing of the God’s land work ( Niswonger. 1992 ) . Jesus Ministry and God’s Kingdom When among the crowds. Jesus used fables which can be said to be wise distorted phrases of learning but with concealed significance like the fable of the Samaritan adult female in John 4 ( Funk et al. 1998 ) . In all the fables he used. there was an intended message that he wanted thrust into the followings and the crowds following him ( Thomas A ; Gundry. 1988 ) . Mending of the Blind 0717897758 Among the many instructions offered by Jesus during the ministry is the narrative of the adult male born blind but healed on the Sabbath ( John 9:1-12 ) . From this narrative. it is clear that many believed that any malformation in a individual was the consequence of a wickedness committed. Jesus contradicts this acutely in the narrative and puts it clear that this was purposeful and intended for grounds of God’s work to be seen. This healing raised a batch of concern from the Pharisees who sought an chance to oppress Jesus because of His instructions. The cured adult male openly declares Jesus as a prophesier from God something which does non convert the Pharisees of the beginning and mission of Jesus as one sent from the Father ( God ) . The Pharisees go further to ask from the man’s parents about whether that adult male was their boy. In fright of being chased out of the temples. the parents refer the Pharisees back to the adult male claiming that he is old plenty to explicate everything. It besides raised a difference among the Pharisees some who claim that He is non from God because He keeps non the Sabbath while others are for the position that he is God sent because no evildoer can execute the miracles and admirations he did. This serves to demo God’s power and ability through the anticipated christ every bit good as turn outing the truth in Jesus’ words that He is sent from God. Jesus and Evil Spirits Demons are besides seen to give into the bid of the power and authorization endowed in Jesus. This is depicted by the straight-out confession of devils in a adult male during a visit in the town of Capernaum by Jesus. In this instance. the devils cry out in entire entry to the authorization of Jesus and acknowledge Him as the â€Å"Holy one of God. the Jesus of Nazareth† ( Mark 1:24 ) . Jesus is seen to command silence among the devils after which the immorality spirits smartly agitate the adult male to the land and go instantly. The bid by Jesus upon the evil liquors marks the separation of these liquors and the adult male. The crowds around besides noted a difference and see the instructions of this adult male ( Jesus ) as one endowed with authorization as opposes to those of the instructors of the jurisprudence. This information is recorded to make the whole Galilee as the people saw the truth accompanied with authorization in work. something extremely opposed by the Pharisees ( Niswonger. 1992 ) . This act therefore advances the land of God as one with power and authorization every bit good as supreme to all other governments of evil nature. The Calling of Levi The naming of Levi. a revenue enhancement aggregator. is another narrative that focuses on the ministry of Jesus in the amplification and nature of the land of God. After his call. Levi follows Jesus and prepares a feast for Him in his house. The fellow revenue enhancement aggregators besides came to dine together with Jesus in Levis’ house. The feast became another platform of unfavorable judgment from the Pharisees who saw Him dining with revenue enhancement aggregators for they regarded them as castawaies and non campaigners of the land of God ( Luke 5:27-31 ) . In cognition of His ground of coming to the universe. Jesus answers them by stating them that it is the sick who consult a physician and non the healthy. With this. He meant that His coming was non for the righteous and blameless but for those in darkness and wilderness of wickedness and wickedness ( Vs 31 ) . This indicates that Jesus came for intent of delivering the lost back to the land of God and everyone is welcome every bit long as she or he is ready to follow and adhere to His bids ( Thomas A ; Gundry. 1988 ) . Decision In Galilee. Jesus performed assorted miracles and admirations every bit good as learning the crowds in the temple and temples ( Niswonger. 1992 ) . His ministry threatened much the Pharisees. Teachers of the jurisprudence and Sadducees who had a batch of resistance. Despite all these resistances. Jesus did non halt carry throughing the will of the 1 who sent Him but instead he sees this as fulfilment of the word of God ( John 15:25 ) . The crowds made a clear differentiation between the Pharisees and Jesus and many are seen to follow Jesus due to the aid. aid. miracles and admirations He performed. At the terminal of the ministry. He assigns His adherents with one assignment â€Å"Go to the universe and preach the Gospel of the Lord and state the people to denounce their evil ways and follow Gods’ righteous manner. Besides. they were to baptise all trusters in the Trinity way† ( Mathew 28:16-20 ) .

National Self-determination in Europe Essay Example | Topics and Well Written Essays - 2500 words

National Self-determination in Europe - Essay Example The principle of national self-determination, which acquired popular political prevalence in 19th century Europe, played a key role in the confederation of Italy in addition to that of Germany at that point in time. It was in no way been entirely unconstructive in the 20th century. Large colonial systems are usually intrinsically unsound, causing formidable demands for independence in their component parts. From time to time when great empires have been endangered with defeat and disintegration, as in Europe after two world wars, this principle has been usually supported as a basis for a new and improved order. This principle has assisted to manipulate the reaction of main powers to the disintegration of empires; and it has offered an outline within which the accomplishment of national objectives was assumed to take in self-determination in the shape of independent institutions. The principle of national self-determination has no reliable explanation. There has been a need of transparency as to which 'peoples' or 'nations' are its owner and intended beneficiaries. Peoples are merely not arranged suitably on the map in a way that makes their creation into states achievable without calamities. Some of the most awful characteristics of 20th Century history included the quest of irredentist assertions, the materialization of authoritarianism in post-colonial states, and the brutal dealing with minorities - can in some way be credited to the principle and its imperfection. Problems with respect to the principle were involved, directly or indirectly, in the causation of the great majority of differences in the 20th century, including the two world wars. The principle has always been disputed, and not only by the European colonial powers. At best it is only one principle among many, and requires be balancing against other values and mitigated by other matters. National Self-Determination Since 1988 The great majority of the countries have in recent times emerged to new independent statehood, or claimed a statehood that was lost previously. This principle has helped these countries in their materialization of independence from long periods of foreign rule. Examples include the republics of the ex-Soviet Union and the republics of the ex-Yugoslavia. 'National self-determination' remains dominant as a slogan for political and armed action; however it has not been supported in the 1990s as a model for international stability or as a possible course to international harmony. The actions towards self-determination in the 1990s have taken place without the benefit of attractive general support of the idea by key statesmen. In many instances for example in the former Yugoslavia and Soviet Union wars resulted. The demand of some peoples to self-determination is still welcomed primarily by an embarrassed silence from the world community as the case of Chechnya demonstrates the point. National Self-Determination & European Integration European integration is conceivably the most debatable. However looking at the genesis and ancient history of the European Community it is clear that West European integration was, for a considerable period of time was believed as something

Cleopatra VII The Last Pharaoh of Egypt Essay Example | Topics and Well Written Essays - 750 words

Cleopatra VII The Last Pharaoh of Egypt - Essay Example Her father requested that Cleopatra and his oldest son, Ptolemy XIII, become joint rulers, and made Rome the guardian of the Egyptian state (brother-sister marriages were common among members of the Egyptian ruling house). Cleopatra was one of six children born to Ptolemy the Flute Player, four girls and two boys. Both boys Ptolemy XIII and Ptolemy XIV didn't live past adolescence. They served as co-throne keepers with Cleopatra VII, as women were prohibited to rule by themselves. Cleopatra and her brother started a civil war between themselves, which resulted in her being forced into exile to Syria. Her sister Arsinoe accompanied her. In Syria, she raised an army and started back to Egypt to reclaim her throne. In 48 BC she was on the eastern frontier of Egypt with her newly acquired army preparing to attack her brother's army. This battle was never fought because Julius Caesar, who had arrived at Alexandria in pursuit of Pompey, and claimed his right to arbitrate Cleopatra and Ptolemy's dispute as the representative of Rome. When Pompey, fleeing the victorious Julius Caesar, arrived in Alexandria seeking sanctuary, Ptolemy had him murdered in order to ingratiate himself with Caesar. Caesar was so repelled by this treachery that he seized the Egyptian capital and imposed himself as arbiter between the rival claims of Ptolemy and Cleopatra. After a short war, Ptolemy XIII was killed and Caesar restored Cleopatra to her throne, with Ptolemy XIV as new co-ruler (Holbl 120-121). Cleopatra realized that in order to gain power she would have to remain on good terms with Rome and its leaders, so she successfully set out to seduce Caesar. Caesar wintered in Egypt in 48 BC-47 BC, and Cleopatra shored up her political advantage by becoming his lover. Egypt remained independent, but three Roman legions were left to protect it. Cleopatra's winter liaison with Caesar produced a son whom they named Ptolemy Caesar (nicknamed Caesarion, little Caesar). However, Caesar refused to make the boy his heir, naming his grand-nephew Octavian instead. Caesar and Cleopatra used each other to gain something, because he wanted to obtain money, and her main concern was gaining power. What had begun as a war between Cleopatra and Ptolemy XIII evolved into a war between Ptolemy XIII allied with Arsinoe, his sister, against Caesar, and became known as the Alexandrian War. Caesar read Aulete's (the flute player) will to Ptolemy and forced him to restore her to the throne. When Ptolemy XIII drowned in the Nile (mysterious, but no reference to her killing or having him killed), Caesar declared that Cleopatra should marry her other brother Ptolemy, then eleven years old, and rule as queen (Chauvaeau) in order to please the Alexanderians and the Egyptian priests. Cleopatra and Caesarion visited Rome between 46 BC and 44 BC and were present when Caesar was assassinated. Before or just after she returned to Egypt, Ptolemy XIV died mysteriously. It's believed that she poisoned him just before he would have reached the legal age at which he could be expected to participate in the government. His death was too opportune to be accidental, because after Caesar's death, her greatest political tie, she still had a tie to Rome,

Demographics and the Housing Market Essay Example | Topics and Well Written Essays - 1000 words

Demographics and the Housing Market - Essay Example Canada has a unique pattern of land markets, wherein the markets have been rated as, "moderately unaffordable", "affordable", "seriously unaffordable" and "severely unaffordable". It has been observed that the national median multiple is slightly above the above the affordable standard. Over the years there has been a rapid increase in housing prices. Prices and quantities in housing markets are determined by the interaction of the supply with the demand. During this time the home ownership rates have eaten up a deeper chunk of house hold wealth, thereby increasing household debt. Most important variables governing the supply of new housing include prices, the costs of construction materials and land, the cost of financing, and the value of the housing stock. Similarly, the important variables governing the quantity of housing include prices, the level of mortgage rates, expectations of permanent income or wealth, rates of return on other investments, and demographic factors that influence the decision to buy a house. Let us take a closer look at Toronto that is well known for its multicultural society. It is situated in southern Ontario, Canada with a population of 5,113,149. It has an urbanised region of 8.1 million people. Toronto being the fifth largest city in North America is one of the most populated cities having people from diverse backgrounds. Its clean environment together with a generally high standard of living, Toronto remains the most desired destination for immigrants. It also has the second highest percentage of foreign-born population. People of different European origins form the largest ethnic group in Toronto. Afro-Caribbean, Filipinos, Latin American too, find a place for themselves in this place. This is reflected in the neighbourhood names, like Little Italy, The junction, Little India, Chinatown, Portugal Village and others similarly named. The Downtown area of Toronto remains most densely populated while the financial district of Bay Street boasts of the maximum number of skyscrapers in Canada. The historically wealthy residential enclaves stretch northwards from downtown. It is a paradox of sorts, wherein, on one hand the up scale homes exist and on the other hand in the core vicinity of downtown low income families and incomes reside. The east and west regions of downtown however, radiate with artists and middle and upper class professionals. The inner suburbs retain the small, single family homes, while the housing boom has led to the construction of many high rise apartments in many neighbourhoods. North Toronto and some western neighbourhoods in York are some such areas. The housing boom has had a cascading effect on many municipalities. The advent of skyscrapers has not only changed their skylines but also helped them develop as secondary business centres .However further growth in the housing market is affected by the temperament of the consumers in that whether they are prepared to take risks. If the price is high and the consumer is averse to taking risks, the purchase of houses will automatically fall. The buying strategy of a consumer therefore differs from one demographic group to another. It can be safety said thus, that consumers differ in their thought process with regards to procurement of a house. Their views may differ on the money spent to rent a house vis-a vis to purchase

The Mechanical Engineering And Metal Engineering Essay

The Mechanical Engineering And Metal Engineering Essay Metal fatigue is caused by repeated cycling of the load. It is a progressive localized damage due to fluctuating stresses and strains on the material. Metal fatigue cracks initiate and propagate in regions where the strain is most severe. This cyclic loading and crack initiation is represented using S-N curves. The Fig 1.1 consists of constant cyclic stress amplitude(S) which is applied to a specimen and the number of loading cycles (N) until the specimen fails is determined. The process fatigue failure is consists of three main stages. The first stage consists of initial crack initiation. The second stage consists of progressive crack growth across the part and the third and final stage consists of sudden fracture of the remaining cross section. The fatigue strength is the stress at which failure occurs for a given number of cycles, whereas the fatigue life is the number of cycles required material to fail. The most important concept of the S-N diagram is shown in Fig 1.1. This figure consists of S-N curves for Steel and Aluminium. (By Shawn M. Kelly) http://www.efunda.com/formulae/solid_mechanics/fatigue/images/fatigue_SN_01.gif Figure 1.1 S-N curves for steel and aluminium. The subject of fatigue testing is extensive, and is complicated by the important factors like the surface conditions of the specimen, the type of the stress variation, and the influence of the shape of the specimen on the stress flow. As it is known as that the highly polished specimens withstand better fatigue than the normal fatigue ones. The most damaging type of stress variation is the complete reversal, which is between the limit  ±Ãƒ Ã†â€™ for which the stress range is 2à Ã†â€™. Fluctuating stresses are less damaging, the standard case is between the limit 0 and +à Ã†â€™. For some materials such as aluminium, no endurance limit exists and therefore it should be planned lifetime of the structure to be less than the failure point. http://htmlimg1.scribdassets.com/izqlx4lamohzwzk/images/10-d0617ea942/000.jpg Figure 1.2 Fluctuating Stress Cycle. The above figure illustrates repeated stress cycle in which à Ã†â€™max (Rmax) is the maximum stress and à Ã†â€™min (Rmim) is the minimum stress and both are not equal. Here t is the time and à Ã†â€™a is the stress amplitude and à Ã†â€™m is the mean stress. In low fatigue cycle region (N In this experiment fatigue test for aluminium alloys of series 2000 have been conducted and described. S-N Curve Experiment for 6000 and 2000 Aluminium Alloys Series: The fatigue failure experiment is carried out for two different types of aluminium alloys i.e. 6082 and 2011 specimens. These experiments are carried in two different groups. A typical standard specimen is shown in Fig 1.3 as below. It is recommended to test at least 10 specimens of each type and they all must be cut from one length of the material. http://static.tecquipment.com/Products/RF1020_ALUMINIUM-FATIGUE-SPECIMEN.jpg Figure 1.3 Test Specimen. A set of bending stresses from 0.9 of the yield or proof stress to 0.4 of the ultimate strength is selected to match the number of the test specimens for the complete experiment. The setting up of the specimen on the machine is a reasonably simple operation which is done in proper methodology. The main object is to align the specimen and loading arm with the axis of rotation to eliminate stresses due to eccentric whirling of the specimen. Both in drive shaft and the loading arm chucks, loose collet grip is inserted. These inserts 9mm diameter ends of the test specimen are slid as shown in Fig. 1.4. http://www.twi.co.uk/twiimages/jk78f1.jpg Figure 1.4 Setting up of machine. ( by http://www.twi.co.uk/content/jk78.html) The collet is first tighten on the drive shaft chuck so that so that about 1 mm shoulder shows between the start of the neck and the face of the collet of the specimen. Then the loading arm is pushed on to the end of the specimen and adjusts the collet to give a sliding fit. The position of loading the loading arm is in such a way that the dimension of 109.5 mm is attained from the rear face of the bearing housing to the adjacent end of the neck of the specimen as shown in Fig 1.4 and finally tight the collet with the spanner. The specimen is rotated to check that the end of the cantilever run axially otherwise the specimen must get bend and can be discarded. Bearing Drive shaft and bearing Electric motor Chuck in which specimen is fitted. ON/OFF SwitchC:UsersasimDesktopall folderpicsmaterialsimagesattachments_16_12_2010DSC01501.JPG Figure 1.4 Rotating Fatigue Machine The counterbalance and load hangers should be ensured are in place. Switch motor ON and OFF to verify smooth running. The bending stress for the test is selected and required load or weight is applied on the load hanger. The revolution counter is set to zero before starting the machine and safety guard is used over the apparatus. The fracture time which might occur is estimated and noted. Endurance Limit: The stress value below which the material will withstand many number of load cycles. It is also known as fatigue limit. The stress level below which a specimen will withstand cyclic stress indefinitely without exhibiting fatigue failure. Rigid, elastic, low damping materials such as thermosetting plastics and some crystalline thermoplastics do not exhibit an endurance limit. Also known as  FATIGUE LIMIT.   (CRC Press LLC 1989) Ultimate stress: It is defined as the maximum/ultimate load under which a specimen breaks or fails. Stress corresponding to ultimate load is ultimate stress. Mean Stress: It is defined as the algebraic sum of maximum and minimum stress divided by 2. Ultimate Tensile Strength: In the given experiment ultimate tensile strength is calculated using the following formula p. Where p is the load applied to the material and is the stress. Recorded Data and Graph for 6000 series: Sample No. Load (N) Bending Stress (MPa) Result No. of Cycle Results (Fail/No- Fail) 1 11.25 225 21400 fail 2 10.6 212 114800 fail 3 9.95 199 115300 fail 4 9.3 186 293800 fail 5 8.65 173 161000 fail 6 8 160 184700 fail 7 7.35 147 905100 fail 8 6.7 134 2411100 fail 9 6.05 121 2765800 fail 10 5.9 118 3156700 fail Recorded Data and Graph for 2000 series: Sample No. Load (N) Bending Stress (MPa) Result No. of cycles (x100) Result (Fail/Not-fail) 1 13.5 270 95 Fail 2 12 240 407 Fail 3 10.5 210 482 Fail 4 9 180 1948 Fail 5 8.25 165 1781 Fail 6 7.5 150 2662 Fail 7 7.0 140 2165 Fail 8 6.0 120 4916 Fail 9 5.6 112 19970 Fail 10 5.2 104 More than 107 Not-fail 11 5 100 10 533 Fail 12 4.8 96 More than 107 Not-fail 13 4.6 92 14 4.6 92 More than 107 Not-fail 15 4 80 More than 107 Not-fail 2. Non-Destructive Testing Methods: 2.1 Introduction: Non-destructive testing (NDT) is a wide range of analysis technique used in science and industries to evaluate the properties of material or component and to detect the flaws in the material without causing damage. The non-destructive testing is the testing of the materials used to find surface or internal flaws or metallurgical conditions without interfering in the integrity of the materials. The flaw includes cracks or inclusions in welds and castings, or variations in structural properties which may lead to loss of strength and finally failure of materials. Non-destructive testing is used for measurement of components and spacing and for the measurement of physical properties such as internal stress and hardness. It is also used for in-service inspection and for conditions monitoring of operating plants. It is also used to look for sign of wear or internal changes on airplanes in aircraft industries. The NDT method is also a function part of quality control which is based on sampl ing analysis, this method is not just for rejecting the substandard material but gives assurance that it is good. The common types of Non-Destructive Testing are stated as follows: Magnetic Particle Inspection. Figure 2.1 Magnetic Particle Testing http://www.azom.com/work/8is7fjkADJ5v0JQByKTw_files/image003.gif Radiography Inspection. Figure 2.2 Radiography Testing. Ultrasonic Testing. Figure 2.3 Ultrasonic Testing. Liquid Penetrant Testing. Figure 2.4 Liquid Penetrant Testing. http://www.twi.co.uk/twiimages/ksijm001f1.gif Eddy Current Testing and Electro Magnetic Testing. Figure 2.5 Electro Magnetic Testing.http://www.eurondt.com/index_2.gif There are different types of non-destructive testing used for removing flaws as shown above but two main types of NDT on which experiments are perform are Magnetic particle testing and Ultrasonic Testing. 2.2 Magnetic Particle Testing: Introduction: Magnetic particle testing is type of non-destructive testing which is used for the detection of surface and near-surface flaws in the ferromagnetic materials and it is basically used for crack detection. Such flaws present in the magnetized part will cause a magnetic field, i.e. flux, to leave the part. It is however same as if there is a surface-breaking flaw in the specimen, the magnetic field is distorted, causing local magnetic flux leakage around the flaw. If the magnetic particles are applied to the surface of this specimen, the surface is covered by very fine iron particles and they will be held in the place by the flux leakage to give a visual indication. Figure 2.6 Deflection in the magnetic flux.http://www.ndt-ed.org/GeneralResources/MethodSummary/MT1.jpg http://www.milinc.com/images/magpartimgs/magpartdiag1.gif Thus a crack is indicated as a line or iron powder particles on the surface. The method of MPT is applicable to all metals which can be strongly magnetised such as ferritic steels, irons and some other alloys but not generally to austenitic steels. The modern equipments generate the magnetic field electrically either directly or indirectly. In direct method high ampere of current is passed through the specimen and magnetic flux is generated at right angle to the current flow. Therefore current flow is in the same direction of suspect defect. If this method is not possible to carry out because of the orientation of the defect, then the indirect method is used. This consists of two forms: Passing high current through a coil that encircles the specimen. Making the test piece form part of a yoke, this is surrounded by a current carrying coil. The effect is to pass magnetic flux along the part to reveal transverse and circumferential defects. Flux: It is a term which is used to refer the amount of magnetic field that exist at specific point within that field. It is measured in Webers. Flux Density: It is an indication of the strength of the magnetic field. It is represented by the lines of forces which are surrounded around the magnetic circuit, where the lines are closer to the flux. It is measured in Webbers/M2 or Telsa. Magnetic lines of force: These lines of force are imaginary lines which describes the path a free north pole would take in a magnetic field. These lines can be plotted using a compass. Experimental Procedure: Pump switch.The equipment used for performing the experiment is known as Johnson Allen NDT (SBU 2000). It should be sited on a firm concrete allowing access for servicing. The specimen provided contains five holes in it. The equipment should be connected to a 230 volt AC, 50Hz, 16 Amp power supply and Quick blow fuses should not be used. Connect Footswitch, Pump, and UV Light via socket to the equipment. Turn main supply on at the wall isolator. Turn the UV light ON and allow 10 mins to warm up. Slide out the ink hopper to within 75mm of the top flange with the Fluorescent Magnetic Ink and slide in the hopper gently. Turn the agitation ON and dispensing pump using the twist switch on the right of equipment. Figure 2.7 Magnetic Particles Testing Machine. Headstocks. Ink spray. Clamping knobs. C.F. control knob. Ammeter ON/OFF Switch.C:UsersasimDesktopall folderpicsmaterialsimagesIMG_0049.JPG Headstocks can be adjusted using the Clamping Knobs at the base. Once specimen is inserted and left side headstock is fixed then the specimen is ready to be tested. AC is current is used for surface defect and HWDC is used for all defect, so select the HWDC. Check the current control dial is turned to minimum. Experimental Precautions: The hole inside the given specimen should be clear otherwise the crack line does not come properly. Headstocks should be regularly checked. The specimen should be cleaned properly to prevent arcing and pitting on the surface. Circuits should be check regularly before performing any operation. Experimental Results: SpecimenThe given specimen contains 5 holes in it. The specimen is adjusted and fixed between the headstocks as shown in the figure below. Before performing the experiment the specimen should be clean properly other the line is not visible. As the hole was not clear and contains ink in it so the defect line is not obtained on the specimen. This can be seen in the figure below. Figure 2.8 Specimen without defect line Headstocks Ink spray.C:UsersasimDesktopall folderpicsmaterialsimagesattachments_16_12_2010DSC01541.JPG Then the holes are clean, and the experiment is performed again. When it is clean, the two defect lines are visible on the specimen. Hence, as the lines are seen on the specimen it can considered that it contains flaws in it. This works under the principle of right hand rule and so specimen has to be adjusted perpendicular to the headstocks so flux travel properly from the specimen and flaw. Testing Specimen. Defect lines. Figure 2.8 Specimen with visible defect line.C:UsersasimDesktopall folderpicsmaterialsimagesIMG_0060.JPG Advantages of Magnetic Particles Testing: It gives instant result and rapid inspection can be done for large surfaces. It is simple and easy to conduct. It detects a variety of surface and sub surface flaws, such as crack, porosity, inclusions, shrinkage, laps etc. Surface preparation is less critical than it is penetrant inspection. Sensitivity of testing can be specified and checked. It is economically cheap. Disadvantages of Magnetic Particles Testing: High currents applied to the components may cause damage. Smooth surface is required for application of this method. Materials which are tested must be ferromagnetic. Deep cracks or flaws are not detected. Materials may need to be demagnetized. Equipment is bulky and heavy. Material or part permeability may affect results. High power supply is needed for low surface. 2.3 Ultrasonic Testing: Introduction: Ultrasonic testing is a type of non-destructive testing method that uses high frequency sound waves (ultrasonic) which are above the range of human hearing and they are used to measure the geometric and physical properties of the materials. Ultrasonic waves travels at different velocities in different materials. There are different ways of sound travels through the material. One type of sound wave is called as compression or longitudinal travels which is at about 330m/s in air and 6400m/s in aluminium and approximately 5960m/s for steel. Figure 2.9 Ultrasonic Testing.http://www.energyworkforce.net/wp-content/uploads/ut1.jpg The pulsed beams of the ultrasound are used in a simplest instrument and a single probe (transducer) which is hand-held is paced on the surface of the specimen. An oscilloscope is connected to the probe which displays with the time-base the time that requires for an ultrasonic pulse to travel through the reflector which can be flaw, black surface etc. The height of the reflected pulse is related to the flaw size as seen from the transmitter probe which is displayed on oscilloscope screen. A single probe acts as both transmitter and receiver and hence the inspection can be done from one side of the specimen. Large grain material such as austenitic steel welding, copper casting etc., produce severe attenuation and are difficult to test but fine grain material such as forged material can be tested easily. Using the indication on the oscilloscope the size of the flaw can be determined. Ultrasonic attenuation and ultrasonic velocity measurements are used to study various material properti es. Experimental Procedure: A typical ultrasonic testing system consists of several functional units such as: Pulser/receiver. Transducer. Oscilloscope. Connecting wires. Couplant. Mild steel material (specimen). A pulser is an electronic device that can produce high voltage electrical pulses. From the high voltage pulses, transducer generates high frequency ultrasonic energy. This sound energy propagates through the material in the form of waves. Couplant. Transducer. Oscilloscope Figure 2.10 Setting up of Ultrasonic Testing.C:UsersasimDesktopall folderpicsmaterialsimagesattachments_16_12_2010DSC01547.JPGC:UsersasimDesktopall folderpicsmaterialsimagesattachments_16_12_2010DSC01545.JPG Mild steel specimen. Defects Display Screen The left side figure shows the cathode ray oscilloscope and the right side figure shows the mild steel material on the ultrasonic test is conducted. The given specimen was of mild steel with five holes in it. Before starting the experiment, the specimen should be properly clean. Then apply a couplant on it. Start the cathode ray oscilloscope. There are different button on oscilloscope such as gain, light, velocity, angle, dialog etc. as shown in figure below. Figure 2.11 various buttons on oscilloscope.C:UsersasimDesktopall folderpicsmaterialsimagesultrasonic8122010(002).jpg So it is adjusted in such a way that the deflection should be visible. The transducer is connected to the oscilloscope with the help of connecting wires. Then this transducer is placed on the specimen for testing the flaws in it. Experimental Observation: When the transducer is placed on the specimen it emits ultrasonic waves from the material (specimen). When the probe is placed on specimen it gives a very nice and high peak on the oscilloscope as shown in the below figure. It means that the ultrasonic waves travel easily from that part of the specimen and hence it does not have any flaw in that part. Figure 2.12 High peak signal in nice surface.C:UsersasimDesktopall folderpicsmaterialsimagesIMG_0065.JPG C:UsersasimDesktopall folderpicsmaterialsimagesultrasonicP081210_11.230001.jpg Similarly, when the probe is moved further on it can be seen in the oscilloscope that the highest peak is coming down and it nearly become nil or very low. It means that the high frequency waves are reflected. Hence it can be observed that, there is a flaw in that part of the specimen. It is the same part under which a big hole is there. Figure 2.13 Low peak signal in defective part.C:UsersasimDesktopall folderpicsmaterialsimagesIMG_0081.JPG C:UsersasimDesktopall folderpicsmaterialsimagesattachments_16_12_2010DSC01545.JPG Hence, from the above two figure it can be concluded that when there is high peak in oscilloscope there is no flaw at that part and similarly when the high peak decreases to low it means that part contains some flaw in it. Advantages of Ultrasonic Testing: The measurement is superior to other NDT methods. It is sensitive to both surface and subsurface discontinuities. It requires very minimal part preparations. It is highly accurate in determining reflector position and estimating size and shape. As the electronic equipment as used it give instantaneous results. It requires only single-sided access when the pulse-echo technique is used. It can also be used for other purposes such as thickness measurement etc. Disadvantages of Ultrasonic Testing: It normally requires a coupling medium to promote the transfer of sound energy into the test specimen. Those materials which are rough, very small, irregular in shape, thin or not homogeneous are very difficult to test. Surface must be accessible to transmit ultrasound. Cast iron and other grained materials are difficult to test due to their low sound transmission and high signal noise. Linear defects oriented parallel to the sound beam may go undetected. Feedback and Evaluation: S-N curve: The experiment S-N curve is used to determine the endurance fatigue limit of the material used in automotive industries. The given specimens were of aluminium alloys. There were two series of aluminium alloys i.e. 6000 series and 2000 series on which experiments are performed. Ten samples of each specimen were given. This experiment was performed in two groups. One group perform the experiment on 6082 specimen and other group perform the experiment on 2011 specimen. In this experiment weights are taken in Newton and the number of cycles is shown on the machine. Corresponding to this stress/load (S) and number of cycles (N), S-N curve is plotted. When the load is high it number of cycles is low and when the load is decreased its number of cycles increases. This is shown in graphs below. This is a S-N curve graph for 6011 aluminium alloy (specimen). From the above graph it can be seen that at high stress/load i.e. 225 MPa or 11.25N. The number of cycles is 21400. As the stress goes on increasing the number of cycles goes on decreasing. Hence the endurance fatigue limit varies at different load for the same specimen. When the specimen fails it is taken out from the chuck and it can be checked microscope and the cracks can be seen properly. From this the physical properties of the material can be checked and the fatigue limit can be obtained. There are some microscopic images of specimens, they are as follows: Sample 1 at 11.25N load. C:UsersasimDesktopall folderpicsmaterialsimagesultrasonicsamplemicroscopicimages- sncurveSample1_1.JPGC:UsersasimDesktopall folderpicsmaterialsimagesultrasonicsamplemicroscopicimages- sncurveSample1_2.JPG Sample 2 at 10.6N load. C:UsersasimDesktopall folderpicsmaterialsimagesultrasonicsamplemicroscopicimages- sncurveSample2_1.JPGC:UsersasimDesktopall folderpicsmaterialsimagesultrasonicsamplemicroscopicimages- sncurveSample2_2.JPG There are many more microscopic images which look similar to the above images and it fails at different loads. The below figure is of the specimen before experiment. http://static.tecquipment.com/Products/RF1020_ALUMINIUM-FATIGUE-SPECIMEN.jpg This specimen is fixed between the chucks and when the experiment is performed at different loads the specimen which is fixed between the chuck breaks. This is shown in the figure below. C:UsersasimDesktopall folderpicsmaterialsimagesIMG_0040.JPG It can be clearly seen from the previous figure that the specimen breaks from its middle. First the crack propagates in it and then its finally fails. The graph below is the S-N curve graph for 2011 aluminium alloy specimen which is experimented by other group. This graph start from 270Mpa and the applied on the specimen is 13.5 N and therefore the number of cycles perform by the specimen is less i.e. 9500. These two specimens cannot be compared as both the group has taken different values of stress and therefore the number of cycles are different both the specimens. From the given ten samples, the discussion of the fatigue limit is nearly impossible as we find the scatter point graph not a perfect curve of S-N. For establishing the endurance fatigue limit of both the specimens more experiments must be conducted on it. Also the specimen should be properly fixed in the chuck otherwise it fails in somewhere before the expected value. Magnetic Particles Testing: This experiment is performed to check the flaws i.e. cracks, holes, black surface of the materials. This experiment comes under non-destructive testing. A specimen of mild steel is given and it contains five holes in it. This specimen is fixed in Johnson Allen NDT machine. This specimen is fixed between the headstocks of the machine. The specimen is fixed perpendicular to the headstocks. The perpendicular arrangement of headstock and specimen is done because this machine works under the principle of right hand rule and it generates flux into the specimen. This flux passes through the material. When there is any flaw into the material the flux gets affected and a black line of iron particles is seen on the surface of the material. In this experiment also the specimen contains five holes in it and a black line of iron particles is seen on the surface of the material. The current is control with the help of C.F. control switch. The black defect line on the specimen can be seen in figure below. The amount of flux running through the specimen can be measured with the help of ammeter. But the ammeter in the machine under which this testing is performed was not working. So the exact amount of flux generated in specimen cannot be measured. The ammeter and C.F. control switch is shown in the figure below. C.F. control switch. AmmeterC:UsersasimDesktopall folderpicsmaterialsimagesIMG_0045.JPG Ultrasonic testing: This type of testing is also used to detect flaws and crack inside the material without damaging it. The specimen provided is a mild steel slab and it contains holes in it. It can be seen that when there is no flaw inside the specimen it shows high peak on the oscilloscope and similarly when there is any flaw the ultrasonic waves get reflected and the high peak decreases to low peak. This is clearly in figures below. C:UsersasimDesktopall folderpicsmaterialsimagesIMG_0065.JPGC:UsersasimDesktopall folderpicsmaterialsimagesIMG_0081.JPG Conclusion: From the above experiments we can conclude that S-N curve is best method to determine the fatigue limit but it cant be done using ten samples as it does not gives the proper curve graph for the specimen. Magnetic Particle Testing is a good way of finding flaws from the materials without damaging it but the machine is not that comfortable and more precautions must be used before using it otherwise the flaws are not detected. Similarly Ultrasonic Testing is a good way cracks and other flaws detecting and these are used in aircraft industries. Referencing: Mark Wilcox and George Downes, A brief description of NDT techniques Available at: http://www.turkndt.org/sub/makale/ornek/a%20brief%20description%20of%20NDT.pdf [Accessed on:3 Dec 2010] www.ndted.org.com NDT Method Summary Available at: http://www.ndt-ed.org/GeneralResources/MethodSummary/MethodSummary.htm [Accessed on:12 Dec 2010] www.insight-ndt.com (2007). Qualiron ductile iron metal quality tester. Available: http://www.insight-ndt.com/ultrasonic/qualiron.html. [Last accessed 3rd dec 2010.] www.NDT.net Non-destructive Material Testing with Ultrasonics Introduction to the Basic Principles Available at: http://www.ndt.net/article/v05n09/berke/berke1.htm [Accessed on:15 Dec 2010] www.materialsengineer.com (2007) Metallurgical Fatigue Failures Available at http://www.materialsengineer.com/CA-fatigue.htm [Last accessed on 3rd Dec 2010] www.sv.vt.edu (1997). By Shawn M. Kelly, Fatigue, Available at http://www.sv.vt.edu/classes/MSE2094_NoteBook/97ClassProj/anal/kelly/fatigue.html [Accessed on 6 Dec 2010]. www.scribd.com Fatigue Failure Available at http://www.scribd.com/doc/29476995/fatigue-failure [Accessed on 8 Dec]. www.key-to-metals.com.cn (99-2000) Fatigue of metals (stress cycles) Available at http://www.key-to-metals.com.cn/page.aspx?ID=CheckArticlesite=ktsNM=281 [Accessed on 8 Dec]. www.twi.co.uk (2005) Fatigue Testing Available at http://www.twi.co.uk/content/jk78.html [Accessed on 12 Dec]. www.azom.com (2010) Non-destructive Testing-Surface Examination Techniques. http://www.azom.com/Details.asp?ArticleID=522 [Accessed on 13 Dec]. www.energyworkforce.net (2010) Principles of Ultrasonic Testing. Available at http://www.energyworkforce.net/?p=126 [Accessed on 16 Dec].

The Characterization of Janie in Their Eyes Were Watching God by Zora N

In the novel Their Eyes Were Watching God by Zora Neale Hurston which is set in the 1930’s explores the life of an African American women from the south, that trying to find herself. The protagonist of this novel is Janie Crawford. In the novel, Janie is going on a journey to find who she really is and to find spiritual enlightenment. To help shape Janie character in this novel Hurston is influence by the philosophical view from the Romanticism, and Realism movement in addition she is influence by the social events that were happing in the Modernism period. Even though when Zora Neale Hurston wrote the inspiring novel in 1937 right at the end of the modernism era, Hurston was influence by the philosophy from the modernism movement. During this time, which took place between 1880-1860 people, determined things by using their feeling over reason and nature over civilization? â€Å"That brought her wide awake. She bolted upright and peered out of the window and saw Johnny Taylor lacerating her Janie with a Kiss. â€Å"Janie!† the old woman’s voice was so†¦in command and reproof†¦that Janie half...