Gender Differences in Advertisements Essay Example for Free

Gender Differences in Advertisements Essay It has been evident for the past decades that advertisers still use stereotyped images of men and women in their advertisements. This can say that the pursuit for equality is still not grasped by the society. The images we see in magazines, in televisions, in billboards portray a very old perception of gender, especially the inferiority and submissive nature of women, with their bodies used as mere sexual objects, if not, still used as household caretakers. Women are also deemed to be beautiful if they have slim bodies, fair complexion and long shiny hair. Men, on the other hand, are portrayed to be strong, dominant and successful in their careers. For this essay, I will be showing two examples of images, which reveals the still existing gender inequality. I will be referring to some themes and issues to support my arguments. Also, for my basic analysis of advertisements, I will be using Katherine Frith’s [1998] approach in â€Å"Undressing the Ad: Reading Culture in Advertising† [Lukas, 2002]. It includes a surface meaning, the advertiser’s intended meaning, and the cultural or ideological meaning. For the semiotic level, which connotes the social themes in advertisements, I will be applying Erving Goffman’s [1979] approach in â€Å"Gender Advertisements. † For the first example, I will use the Gucci Magazine advertisement as shown in Figure 1 in the appendix. Just by looking at the picture, you can already see that there is gender inequality. Before dwelling into that, I will first apply a basic analysis of the ad. 1. The Surface Meaning It can be seen that there are two subjects in the picture. It is very evident that one is female, while the other one can be assumed to be male. It is because of its masculine features, as seen in the upper body though the face was not explicitly shown. The female is down on the floor, touching the shoes of the male. She is wearing a sexy gold dress. The male is standing, wearing only khaki pants. Both clothing are assumed to be under the brand, Gucci. The setting is in the desert and the overall appeal of the image is very earthy. There are no words or taglines in the ad, just â€Å"Gucci†. 2. Advertiser’s Intended Meaning The advertiser might be showcasing the earthy tones and summer styles of Gucci, as seen in the very comfortable and breezy clothes the subjects are wearing. There is still a certain class in the style, whether you put them in the dessert or just wherever. 3. Cultural or Ideological Meaning The picture obviously depicts the dominance of males over females. To be more detailed, we use Goffman’s approach by taking into consideration the social themes being depicted here. The positioning of the subject explicitly exposes gender bias. The man is standing while woman is down on floor. It just shows that men are in control and have power over women. The woman is way below under his legs, at his feet to be exact. She is even touching his shoes. It reminds me of a servant, wiping the dirt of his master in the desert. The woman here really looked inferior and if we extend the picture upward, exposing the face of the man, it can be that he is looking down on her, seeing the contraction of his abdomen in the picture. Moreover, such display of abs connotes a very masculine and strong appeal. We know that men who have well developed abs are the ones who are the most physically fit. The woman on one hand is thin and sexy, with her body parts, especially the legs and the cleavage, generally exposed. Reexamining the â€Å"Nature/Culture† Paradigm, we are reminded of the â€Å"vertical† perspective, which organizes the relationships of male and female [Tilleuil, 2002]. The woman is labeled as the dominated and the man is labeled as the dominant. According to the sociologist, Claude Herne, â€Å"In the advertising image, in order to make the woman feel inferior, signs multiply and underline the weakness, the lack of self-confidence, fragility, hesitation, dissimulation, submission, childishness and infantilization, too. [Tilleuil, 2002]. This signs are very well depicted in this ad. The woman looks fragile, and she displays a look of submission in her eyes, like a slave. This leads us to another example of an advertisement, which now depicts heavy violence to women. The ad to be examined here is figure 2 of the appendix. It is an ad from Dolce and Gabbana. 1. The Surface Meaning In the ad, there are six subjects. There are five males and one female. It looks like they are in a rooftop of some resort/hotel. Some men are wearing fitted Polos, while others are half naked. Their skins are very shiny. It looks like there’s oil or sweat in them. One man is on top of the woman, while others are watching intently to the scene in the middle. The woman is lying down on the floor, wearing a sexy black dress and high heels. 2. Advertiser’s Intended Meaning The advertiser here is showcasing the sexy formal styles of Dolce and Gabbana, with their breezy polos, classy dresses. It looks like the clothing is part of their summer collection. 3. Cultural or Ideological Meaning/Goffman’s approach It is very evident in the picture that the scene is depicting a â€Å"gang rape†. This is extreme sexual violence right at your eyes. Such violence is even portrayed in classy way, with the clothing of Dolce and Gabbana at display. We look back to the inferiority and submissiveness of the woman here. The woman is again down on the floor, but this time, she is lying down, about to be raped by the first guy on top of her. But we also see here that they are being watched by other men. One of them is already topless, while, one is semi-buttoned, with his chest exposed. There is also one who is only wearing a sleeveless undershirt, while the last guy is still fully dressed up. They all have this sultry look to the woman. The woman here is about to give herself to the man, with her hips going upward. Yet, you can see that the man is locking her arms in the floor, and it looks like she cannot get away with his grasp. The woman has been the subject of sexual pleasure. Violence here is part of the pleasure package. As we have been exposed in the media, we can recall about the whipping, the slapping of women, their being tied up to different places, exposing a lot of skin, with their bodies being molded to different erotic positions. In most cases women are victims of such violence, since men being tied up would not be a delightful sight for them. Overall, as seen in most advertisements, women are always the weaker player, being taken advantaged of men, who are more superior. Women are still being depicted as mere objects of sexual desire [Sharabi, n. d. ]. Women are seen only as domestic providers, who do not have their own decision making powers. According to the blog of â€Å"Daughter of Liberty† [2007], she said that the following are some important points to take note in advertisements: 1. Canting It can be seen through the body language that women are submissive and they have low self-confidence. For our examples, it is explicitly shown with the woman on the floor, with no control. 2. Clowning It can be seen that women are usually posed like an innocent child in the ads, which connotes ignorance (stupidity perhaps) and practically it tells us that women are easily dominated. 3. Dependence Women are seen to be very dependent to men, which can be particularly found in the first advertisement, where the woman is touching the shoes of the man. 4. Dismemberment Dismemberment is described as focusing on a particular body part. However, for our first example, it was the man who was dismembered. 5. Dominance/violence This is evidently seen in both of our examples, especially in the Dolce and Gabbana ad, which depicts a gang rape. I think ads these days have become more violent and more associated to sex than ever before, due to change of perception of our society. Sex and violence is not a taboo anymore, and we can just openly discuss those issues in a coffee table. However, being a more open society must teach us to be less discriminating and degrading. Women and men were created equally. More ads should focus on empowering women, like what is happening in Dove. We must not let ourselves, especially our children to be exposed to such violence because images convey very powerful images and it can impact one’s behavior.

Reproductive Strategies in Birds

Reproductive Strategies in Birds Catherine Carrick Introduction Birds, like any other organism, constantly struggle to find a balance between the benefits of reproduction and the costs of reproductive effort expressed as adult mortality (RICKLEFS, 1977). As well as behavioural differences among species such as brood size, protection of young or the effort required for foraging, environmental factors influence avian reproductive strategies. This includes bionomics, for example; how efficiently a bird procures and utilizes available resources, and how it protects its investment (offspring). During the last 50 years it has become the consensus that reproduction and mortality rate among birds are directly proportional, and that the age of sexual maturity increases with adult survival rate (RICKLEFS, 2000), where reproduction rate is determined by the length of the breeding season, the clutch size, and nesting success. The evolution of optimum clutch size was one of the first studies conducted by David Lack (1947) where food supply directly influenced fecundity. Later studies showed that in most cases, birds with a longer life span such as albatrosses had decreased clutch sizes, postponed sexual maturity and decreased reproductive success due to greater parental investment and thus a greater risk of parental death. Environments are often unpredictable and birds such as the black kite (Milvus migrans) produces more offspring early on it life (SERGIO, 2010). Competition, resources and hazards change in such a way and often so rapidly that the kites would die before being able to reproduce if sexual maturity occurred much later. Life Histories When understanding reproductive strategies, is it important to understand what is meant by life history. It is the history of adaptations and genetic modifications of a population in response to changes in the environment. It is not to be confused with a life table, which shows the interactions of adaptations and genetic modifications with the environment. Genetic variation gives rise to an evolutionary response in the gene pool to variation in the environment. Changes in the environment tend to change the density and age structure among a population making the population either crash, or revert back to a state of equilibrium. Sex Ratio Aspects of birds lives can vary up to 10-fold among species with opposite life histories (RICKLEFS, 2000) and the theme of this evolution include several components. The first is sex ratios. Fishers principle states that when male births are less common, those male offspring have better mating potential than the female offspring and so the males have more offspring. This then means the genes for male procuring tendencies spread, male births become more common and a 1:1 sex ratio is approached (the equilibrium). This reduces again as being born male becomes less advantageous (Hamilton, 1967). A study by Neville et al (2008) showed the sex ratio of 298 nestlings from 81 nests of golden-winged warblers Vermivora chrysoptera to be approximately 50:50 (1:1). However, Daan et al (1996) observed some raptor species producing excess daughters early in the breeding season and males later in the season, whilst other species showed the opposite. The deviation may be explained by specific enviro nmental conditions having different consequential outcomes for male and female offspring (DAAN et al, 1996). Sexual Selection Males and females differ through sexual dimorphism and secondary sexual characters such as elaborate tail feathers. If there is heritable variation in a trait that affects the ability to obtain mates, then variants conducive to success will become more common over time. Peahens select for male peacocks with the largest most elaborate tail feathers, and so this character is genetically passed on and becomes more common. Access to mates is a limiting factor for males and it was predicted that sexual selection will be a stronger force in the evolution of males than females (BATEMAN, 1948). This leads to stronger competition over mates in males and means that females should be choosy as they invest heavily in reproduction, yet another reason why males have large plumage to advertise to females. There are two theories as to why a female would choose a male with costly characters. Firstly is the sexy sons theory where cost arises as the end product of a runaway process. Secondly is the go od genes theory where females choose mates with good genes to maximise viability of there offspring (TRIVERS, 1972). For example, those peacocks with the brightest, largest and most elaborate plumage indicate to a female their probable resistance to parasites. Parental investment This can be described as any parental interactions with their offspring that increases the offspring survival rate, at the cost of the parents ability to invest in other offspring (TRIVERS 1972). Social monogamy with biparental care (BURELY, JOHNSON, 1992) is common among avian species. However, this has evolved from a very  different diapsid lineage in the fact that most extant and extinct diapsids show promiscuity and mainly lack parental care (with exceptions like crocodilians). Fig. 2 shows the stages of evolution from limited parental care in the basal archosaur leading to increased biparental care and ultimate monogamy among extant avian species. In contrast, social parasitism can avoid the risks of parental investment as seen in North American cuckoos (Coccyzus sp.) where the cuckoo lays its eggs in a hosts nest and the host incubates and raises the parasitic cuckoo chicks. Parent-offspring conflict The conflict is at its peak during the parental care period. It is loosely divided into intrabrood conflict where the offspring favour different division on parental investment that that preferred by the parent (KILNER, 2007) and interbrood conflict where the demands made by the offspring are too great that the parent withholds investment for future reproduction. An example is given in a study by Stamps et al (1985) on budgerigars (Melopsittacus undulates) where in female-fed families the parent controlled food allocation as they did not favour begging, whereas, in male-fed families the offspring had the greatest control, as the male parents were susceptible to allocating food to those who begged. Optimization in a Variable Environment D. Cohen (1966, 1968) reached the conclusion that fluctuating environments always favour greater reproduction, whereas constant environments select for small litters (SHAFFER, 1974). A case study by Jetz et al (2008) examined clutch size from 5290 avian species worldwide and correlated the environmental influences with the comparative approach (the relation of clutch size to other biological traits) in one analysis. It showed conclusive evidence that backed Cohens theory. For example, avian species in more stable seasonal environments had larger clutch sizes than those of tropical birds where the climate changes unpredictably and rapidly. Nest predation Prolonged incubation and nestling periods increase the probability that those nests will attract predators. The opposite can be said for minimal incubation and nestling periods. Therefore it can be assumed that those species with larger clutch sizes, prolonged incubation or nestling periods have adopted and evolved strategies to evade predation. For example, Killdeer (Charadrius vociferous) eggs and chicks are extremely well camouflaged (Fig. 3). Niko Tinbergen (1967) found that in the case of the black-headed gull (Larus ridibundus), the adult would remove the eggshell a short time after its chick had hatched, and place it away from the nest. This meant leaving the chick alone momentarily, but the advantage of removing the white, un-camoflaged egg shell outweighed the cost of cannibalism of the chick from neighbouring gulls. This behaviour is heritable among all black-headed gulls. Birds that evolve in areas with few or no predators should then exhibit larger clutch sizes, prolonged incubation and nestling periods. This is seen in island species that have had time to evolve in the absence of predators. However, a study preformed by Trevelyan and Read (1989) showed no significant differences in reproductive strategies between mainland Australia and New Zealand species. Trevelyan and Read interpreted these observations to be due to the arrival of humans, stimulating reproductive strategies similar to those on the main land. Conclusion Birds expend a great deal of energy providing parental care, breeding and courtship, whether or not the offspring are precocial (an advanced state if development) or altricial (completely dependant on the parent/s). It is clear that productivity of breeding is intrinsically linked to an avian life span and environmental factors which constantly encroach on avian fecundity and mortality. Of the 10,000 known extant avian species, each has developed a unique reproductive strategy, whether its be elaborate plumage to attract a mate as seen in tropical birds (genetic); removing egg shells to avoid cannibalism of offspring (behavioural); or laying a large clutch to ensure survival of the next generation in an erratically changing environment.

Designing an automated lawn mower

Designing an automated lawn mower Chapter 1: Introduction to the study Background to the research The first lawn mower was contrivance in 1827 and patented in 1830 by Edwin Beard Budding, an engineer from Stroud, Gloucestershire, England. He got this idea after seeing a machine in a textile industry, they used a cutting cylinder (or bladed reel) mounted on a bench to trim cloth to make a smooth finish after weaving. Budding realized that a similar concept would enable the cutting of grass if the mechanism could be mounted in a wheeled frame to make the blades rotate close to the lawns surface. First lawn mower was all made of cast iron and featured a large rear roller with a cutting cylinder (reel) in the front. Cast iron gear wheels transmitted power from the rear roller to the cutting cylinder. These machines were remarkably similar to modern mowers. By 2000, robotic are most important things in the future, no matter if they are used to work in industry or at our homes, mimic some of the human capabilities, or used to access dangerous environments, launched to space, or simply used to play with. They are help to reduce human dependencies in performing a task and to reduce time for production while maintaining consistent quality of production outputs. Robotic devices are commonly used in manufacturing industries and for domestic use as well. Modern houses normally garden with grass need to be maintained at a short height, is most user upset. Traditional lawn mowing is often a trouble, dangerous and time consuming in cutting the grass. The task of manual lawn mowing can be replaced by automatic lawn mower using a robot programmed to perform such task. A automatic lawn mower is designed and installed in this project. Automatic Lawn mower also can act as an aid to homeowners who can no longer perform physically demanding tasks, such as the elderly or disabled. On the residential side, many elderly and disabled enjoy lawn maintenance, but are no longer able to enjoy the satisfaction of maintaining their own lawn due to the physical demands of traditional lawn mowing equipment. These researches (automatic lawn mowers) are very elderly and disabled friendly with the simple. Automatic lawn mower also has the Perfect Balance Between Eco-friendly and Practicality. Robots are very expensive, not any people really want to buy costly robotic devices. Create a low cost inexpensive automatic lawn mower will allow house owners to maintain their lawn without spending much time and money. An autonomous robot can mow the lawn of a given specific area of the garden without any human supervision. Research problem / Research question However with the continuous development, several resources also make the arbitrary abuse. Oil coal resources are depleting shortages of energy and serious pollution. In the 20th century, energy crisis is any great bottleneck (or price rise) in the supply of energy resources to an economy. It usually refers to the shortage of oil and additionally to electricity or other natural resources. An energy crisis may be referred to as an oil crisis, petroleum crisis, energy shortage, electricity shortage or electricity crisis. The near future, the petroleum crisis already is a very big problem. Globality by way of disburden, they would increase the petroleum price, and debase their expense. Still got another country, hit sb. when hes down increase the petroleum price, and gain profit. Market failure is possible when monopoly manipulation of markets occurs. A crisis can develop due to industrial actions like union organized strikes and government embargoes. The cause may be over-consumption, ageing infrastructure and sometimes bottlenecks at oil refineries and port facilities restrict fuel supply. That crisis involves the industry, business, carrying trade, until economic policy. In response to the petroleum crisis, the principles of green energy and sustainable living movements gain popularity. This has led to increasing interest in alternate power/fuel research such as fuel cell technology, liquid nitrogen economy, hydrogen fuel, biodiesel, solar energy, geothermal energy, tidal energy, wave power, and wind energy, and fusion power. Rotary mowers can throw out debris with tremendous force is one of the most dangerous tools around the home. Each year, approximately 80,000 people with injuries caused by power mowers were treated in emergency departments. More than 9,000 of the people hurt were younger than 18 years. Lawn mower injuries include deep cuts, loss of fingers and toes, broken and dislocated bones, burns, and eye and other injuries. Some injuries are very serious. Both users of mowers and those who are nearby can be hurt. More than 20 percent of lawn mower injuries involving the hands, fingers or wrist. Some time the users want to adjust the height of the mowers wheels, forget pull out the spark plug after that the lawn mower suddenly turns on. When the user use lawn mower also need to make sure all debris (rocks, sticks and toys) are removed from the yard before you begin mowing. Loose objects can project out of the lawn mower and cause serious injury. Aims and objectives In the course of design and installation of an autonomous robot, the following criteria are set to fulfill its objectives: The robot must cutting grass in the surface area The robot must not be too costly and be affordable to all The lawn mower cutting tool can be adjustable with servo motor The robot also can be rechargeable energy with solar planer. To provide an automated lawn mower which follows a programmed path of data point without the use of calibration marker, lights, wires, or buried conductors To provide an automated lawn mower that is versatile in programming such that it can be maneuvered to follow any physically possible path including crossing over itself and reversal of direction Justification for the research On the residential side, many elderly and disabled enjoy lawn maintenance, but are no longer able to enjoy the satisfaction of maintaining their own lawn due to the physical demands of traditional lawn mowing equipment. These researches (automatic lawn mowers) are very elderly and disabled friendly with the simple. Methodology Automated lawn mower, are mower automatically along the edge of a swath which has been cut within or around an area of uncut grass. That includes a sensor assembly mounted on the front of the mower to detect the edge of the swath by sensing the different in height between uncut grass and the cut grass in the swath. In front of the lawn mower, also got a one touch sensor, that means it will be automatic avoid collision with obstacles along its pathway. Automated lawn mower also can adjustable the cutting tool about 1cm~3cm, this function is let the user choose which height with the grass. This mower using the solar planer to generate the power, and rechargeable lithium battery, let the mower moving more time. Conclusion Automatic grass cutters are environmentally friendly (no petrol, oil or emissions). No need bagging and disposal of clippings is eliminated. It also can healthy and beautiful looking lawn. In addition to environmental protection, also can save user time and money. Chapter 2 : Literature review Most people do not associate air pollution with mowing the lawn. Yet emissions from lawn mowers, snow blowers, chain saws, leaf vacuums, and similar outdoor power equipment are a significant source of pollution. Todays small engines emit high levels of carbon monoxide, a colorless, odorless, poisonous gas. They also emit hydrocarbons and nitrogen oxides, pollutants that contribute to the formation of ozone. While ozone occurs naturally in the upper atmosphere and shields the earth from harmful radiation, ozone at ground level is a noxious pollutant. Ground-level ozone impairs lung function, inhibits plant growth, and is a key ingredient of smog. Each weekend, about 54 million Americans mow their lawns, using 800 million gallons of gas per year and producing tons of air pollutants. Garden equipment engines, which have had unregulated emissions until very recently, emit high levels of carbon monoxide, volatile organic compounds and nitrogen oxides, producing up to 5% of the nations air pollution and a good deal more in metropolitan areas. According to the U.S. Environmental Protection Agency (EPA), a traditional gas powered lawn mower produces as much air pollution as 43 new cars each is being driven 12,000 miles. Among various types of outdoor equipment, lawn mowers are an important contributor to community noise, with the blades contributing up to 50% of noise (Tauro Mann III, 1997). Lawn mowers can be just as loud as leaf blowers. According to the Canadian Hearing Society (1991), lawn mowers can emit 80-96 dB(A) when measured at a distance of three feet. Like gas-powered leaf blowers, gas-powered lawn mowers emit air pollutants. As indicated in Table 4 below, these air pollutants include hydrocarbons, carbon monoxide, nitrogen oxides and particulate matter. These emissions represent less than 5% of the total emissions of these individual pollutants in Canada, except for hydrocarbons, which are nearly 14% of total hydrocarbon emissions (Environment Canada, 1994). Two-stroke lawn mowers tend to be more polluting than four-stroke models. For example, one study found that lawn mowers with two-stroke engines emit hydrocarbons at an average rate in excess of seven times the rate of emission from lawn mowers with four-stroke engines (Priest et al., 2000). Evaporative fuel emissions from lawn mowers are estimated to be 5.8 grams/day (Wong, 2001). Lawn mowers can be more polluting than driving a car. One half-hour of lawn mowing with a typical walk-behind mower produces as much hydrocarbon emissions as driving a 1995 automobile for about 100 miles or 160 kilometres (California Air Resources Board, 2000). A Swedish study found that the emissions produced from a lawn mower engine during one hour of operation were around 4000 ÃŽÂ ¼g/h; this is comparable to driving more than 150 km in a car with a three-way catalytic converter (Christensen Westerholm, 2001). Both lawn mower users and bystanders can be exposed to noise and air pollutant emissions. Figures from Statistics Canada indicate that there were 5,850,000 lawn mowers in Canada in 1985, the majority of which were gas-powered (73.3%). There were comparatively fewer electric (23.9%) and push mowers (2.8%) (Environment Canada, 1994). Most lawn mowers that are available in the Canadian marketplace are imported (Maillette, 2001). According to information obtained from Statistics Canada, 126 walk-behind lawn mowers were imported into Canada during 1996-1999. Figures on domestic production of lawn mowers are not available from Industry Canada (Maillette, 2001). Automatic lawn mower (e.g., lawn mowers) contribute to noise and air pollution that can adversely affect human health and the environment, minimize noise, exhaust and evaporative emissions from lawn/garden equipment and protect public health. Chapter 3 : Concept development and evaluation Timing Belt Belt driver are provides a convenient means for transferring power from one shaft to another. Belt are frequently necessary to reduce the higher rotative speed of electric motors to the lower values required by mechanical equipment. But in this project are contrary, because the cutting tools need a top speed to operate. Normally in industrial, are using two general type of belt driver, v-belt and timing belt (synchronous belt). Since the cost of v-belt is relatively low, the power output of a v-belt system may be increased by operating several belts side by side. All belts in the drive should stretch at the same time rate in order to keep the load equally divided among them. When one of the belts breaks, the entire group must usually be replaced. The drive may be inclined at any angle with a tight side at either the top or bottom. Since belts can operate on relatively small pulleys, large reduction of the speed in a single drive are possible. E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_08 Feb. 12 22.14.gifE:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_06 Feb. 12 21.53.gif Pitch diameter of a pulley P = No teeth on pulley x Drop distance d = Belt contact angle ÃŽÂ ± = arc sin [C = centre distance] Belt fall length fl = Contact length small pulley CL2 = Contact length big pulley CL1 = Belt length L = 2(fl) + CL1+ CL2 Total number of teeth on belt = Big pulley, P1 = No teeth on pulley x = 38 x = 61.4465mm Small pulley, P2 = No teeth on pulley x = 18 x = 29.1063mm Drop distance, d = = = 16.1701mm Belt contact angle, ÃŽÂ ± = arc sin [C = centre distance] = arc sin = 7.87Â ° Belt fall length , fl = = 116.9815mm Contact length small pulley, CL2 = = = 41.7221mm Contact length big pulley, CL1 = = 61.4465 = 104.9601mm Belt length, L = 2(fl) + CL1+ CL2 = 2(116.9815mm) + 104.9601mm + 41.7221mm = 380.6452mm E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_04 Feb. 12 21.49.gif Using micromagic system software determine the belt length. E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_05 Feb. 12 21.53.gif Imperial XL section ht = 1.27mm p = 5.08mm hs = 2.30mm Spur gear E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_01 Feb. 15 11.03.gif Spur Gear Formula 14 degree Pressure Angle 20 and 25 degree Pressure angle Addendum, a a = a = Dedendum, b b = b = Pitch diameter, D D = D = Outside diameter, Do Do = Do = Number of teeth, N N = D x P N = D x P Tooth thickness, t t = t = Whole depth, ht ht = ht = Clearance, c c = c = Center distance, C C = C = Working depth, hk hk = hk = Chordal tooth thickness, tc tc = D sin () tc = D sin () Chordal addendum, ac ac = a + ac = a + Diametral pitch, P P = P = Center distance, C C = C = Ball and roller bearings A ball bearing usually consists of four parts: an inner ring, an outer ring, the balls and the cage or separator. To increase the contact area and permit larger loads to be carried, the ball run in curvilinear grooves in the rings. The radius of the groove is slightly larger than the radius of the ball, and very slight amount of radial play must be provided. The bearing it thus permitted to adjust itself to small amounts of angular misalignment in the assembled shaft and mounting. The separator keeps the balls evenly space and prevents them from touching each in the sides, where their relative velocities are the greatest. Ball bearings are made in a wide variety of type and size. Single row radial bearings are made in four series. Extra light, light, medium, and heavy, for each bore, as illustrated in Fig 1

US History :: essays research papers

Even before the eve of the Revolution, the colonists constantly had the image of independence lingering in the back of their heads. The colonists felt that they were first on a loose leash, and as that leash tightened over the years, the colonists began to understand their true culture and identity. As time passed, the colonists developed a greater sense of their identity and unity as Americans and by the eve of the Revolution, even though at first the colonists were unorganized and had problems with being united, they remained determined to gain their identity and unity as Americans.  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  The most significant factor in that time period was unity. The wrath of intercolonial disunity slowly dissolved as time went on. Enormous distances between colonies, geographical barriers like rivers, conflicting religions, varied nationalities, different types of governments, boundary disputes, and resentment amongst themselves were the factors involving disunity. However, the colonists over time started to understand that they were all fellow Americans who shared common ideals. In 1754, the Pennsylvania Gazette showed the colonists an image that would show that unification was essential for independence. It was a picture of a snake that was cut into little parts and each part was a place. The snake depicts the image of independence, and without the unification of all its parts, it will not be complete. The title â€Å"JOIN, or DIE† of this drawing is demanding. The author of this drawing wanted to say that if the colonists wanted to achieve independence, they must unite and fight together for their common cause (A). In regards to unity, during 1774 and 1775, there were 17 contributors of Donations for the Relief of Boston. This astonishing number of contributors reflects the desire and willingness for unification. It shows that from anywhere as north as Massachusetts and as south as South Carolina, the colonies wanted to help each other out when another was in need. This fact is clearly evident that indeed America was slowly but surely trying to unite and fight as one (G). Another piece of evidence, which was composed in the 1770’s, can be seen in the Letters from an American Farmer by Hector St. John Crà ¨vecoeur. The narrator in this letter says that he â€Å"could point out to you a family whose grandfather was an Englishman, whose wife was Dutch, whose son married a French woman† (H). This quote shows that people were creating a new race, which in return, brings unification amongst different nationalities in colonial America.

Personal Growth Experience :: essays research papers

Personal Growth Experience   Ã‚  Ã‚  Ã‚  Ã‚  As a mother I have cared and tried to push my son’s education so that he can succeed in his life. I came from a large family in Brazil. I wasn’t the only child; I learned to share, how provide for myself, and for my 3 sisters, and 3 brothers. My father was a serious man; he had a job, and still came home to provide for all of us. During dinnertime he insisted that everyone had to be home and had to sit down at the table and talk about their day. This was a must in my family too. The reason why he had that rule was because he was a religious man, and meals should be shared with the family as well as conversations. No one had any choice of not sitting at the table, unless we didn’t want to eat.   Ã‚  Ã‚  Ã‚  Ã‚  When I had a child, I waited for the right time to have one. I didn’t want to rush into motherhood responsibility until I had everything in order to support my child. My husband had to find a job, and so did I. We had a house, a car, and jobs to support my child; we were ready. When my child was born, I chose to go to the United States of America, so that my child can have a better life. In Brazil, the education is not challenging, and not recognized in other parts of the world as a higher education. For him to have a better education, a better standard of living, and for him to have what we never had, we had to give up our lives in Brazil. As the years went by I was always there for my son. Through my eyes as he grows older, he is still the little boy that I held in my arms for the first time. In his teenage years I have seen him grow further away from me. Every day when he gets home he goes to his room without talking to me, or saying anything about his da y. I guess that is what all kids go through in these years, because of the stage of exploration of new things in life. Like driving, video games, girls, and puberty. I still love my son, and even if he doesn’t want to talk to me then I guess he has everything in order in his life.

My Mugged Response Essay

In lesson 1 we demonstrated our perception of Dig and Marky through physicalising there characters. The aspects of the drama medium we used were, freeze frame, improvisation, thought track, mime, movement and gesture. As a class we read and comprehended pages 5-21. They’re about Markey and dig interchanging there burglarized items. After we read through the play, sir split us into 2 groups. One group: Markys, One group: Digs. We had to show a scene from their morning routine (in the shop). I got put into the group of Dig, I interpreted Dig in a behaviour which was to procrastinate. I conducted Dig in lifeless ,manner. I showed that dig was lazy by my use of drama medium (movement) and acting skills. My actions were very postponing and sluggish letting the audience know , my character was extremely careless. I played Dig in a careless, lifeless manor, because from the play we know that he is very self-centred and in ones self. In lesson 6 we had to summarise how each character might feel about the murder. In lesson 6, we used guilt spilt staging, voice & contrasts, We used one of the forms of stimuli of ‘play scripts’ . In the play script we explored the line ‘ I told him not to come back didn’t I mel’ to understand how all the characters feel guilty. The characters feel guilty because marky has been murdered. All the characters feel conscience-stricken and guilt ridden. The script changes throughout the ending of the play it raises the tension by shortening the dialogue. The characters speech becomes shortened and there words become more scarce and sudden . We then did a police interview by the use of drama medium ; split staging. Split staging can use two or more different levels, and the audience can see characters better if one group is behind the other and using the raised level. Me and shea was the police officers interviewing dig and sophie which in this case was Hodan and Arthur. We asked them questions such as , how do you feel about the death of markey ? They replied with very abrupt replies as we know thy was very heartbroken about the tragic news. In lesson 3 we had to explore characters reactions to the morning of the murder. The drama mediums we used were hot seating, role play , characterisation, action, plot content. We read pages 22-28 . Then we hot seated marky, dig, leon , taylor soph or mel. When it was my turn to hot seat I was soph. My group asked me questions such as how do you feel towards leon? How do you feel about your school life and home life? I replied in the character as soph as much as possible. I had a lot of positive feed back on my use of hotseating . Eisa said ‘’ carlie answered the questions well linking back to the script and what we already know about soph and she answered immediately and confident ‘’ In my opinion Jerome Richardson was hot seated outstandingly! Using him sense of emotion very well showing us his emotion by the way he spoke and the way he looked uncomfortable with certain questions . Jerome really played the character breathtakingly when asked the questions. He stayed in character and was very believable. Then we did a role play off text improvisation showing characters feeling before the murder (using thought track) By doing a off text improvisation we are showing out understanding of how much we know about the character. i was mel in the scene so I took all I knew about mel and pretended I was her thinking about how she would act and what she would do.

Disengagement Theory Essay

When people whether old, young, able bodied or disabled are involved in an activities they known to be engaged in this activity by taking part. But some elderly, able bodied or disabled, don’t like to take part in these activities they are disengaged also knew as disengagement. Back in the early 1960’s two authors by the names of Cumming and Henry put forward a theory about older people being disengaged where they would naturally tend to stay away from activities this was branded as disengagement because They would naturally tend to withdrawn from social involvement with other people of their own age or people around their age. They would be restricted to what they could do in a social care settings, this would be either through ill health, travel, and where they live in regards to then getting an organised event in another town or city. Many of them just retired from their jobs away from family and friends. Back in 1975 the author Cummings put an argument forward that older people would experience a larger reduction in social contact as they grew older, they became increasingly lonely as they withdraw from society and they become less concerned with the expectations of other people. His argument was that it was appropriate and sometime healthy for the older to withdraw from others and disengagement was a natural part of the ageing process. This theory of disengagement has been widely accepted in society in the past. An example of this argument was by an author by the name of Bromley back in the 1970’s he argued the following statement, ‘although some individuals fight the process all the way, disengagement of some sort is bound to come, simply because old people have neither the physical nor the mental resources they had when they were young.’ This theory also fits in with the ‘springboard’ view of life, it also suggest that losing contact with friends, family and other people has an inevitable consequences on the biological decline and also withdrawn from other people is a natural appropriate response to the ageing process. There is also very little statistical evidence that suggest that this is a common or general rule to everyone of an older age. An author by the name of Zimbardo also argued on this disengagement issue in the early 1990’s, his argument was that disengagement view of social ageing has been largely discredited on a number of occasions and reasons. But the majority number of older people do remain socially involved with friends and involved with their family, but the majority of many older people become more involved with close family as they age, this is mainly because they become involved in their grandchildren and great grandchildren lives, and sometimes the majority of them do this, rather than seeking out new friends. Does this also mean that with only interacting with their close friends and family, that these people are disengaged? There are many researchers these days that don’t agree with the disengagement theory. it is also important to remember that when the author’s Cummings and Henry first came up with these theory’s in the early 1960’s there was no internet or text messaging, mobile phones and majority of older people in the 60’s didn’t have access to a car and back in those days most house didn’t have a telephone or television in them let alone a computer or mobile phone, whereas now days most house have a telephone, mobile phone, internet access and a car to travel to see friends and family.