Marvin Hugley Jr. Essays (2231 words) - Poetry, Literature

Marvin Hugley Jr. Tim Welch English 102 5/22/17 Title: Robert Frost "The unexamined life is not worth living"," Know thyself"The great philosopher Socrates stated these ideas and made it his duty to fulfill his own reasoning. He knew that as human beings, we are a complex system of nature's product that is still very enigmatic to ourselves. Thus, to fully comprehend oneself as an individual, one must look inward and seek the cause and function of one's own natural condition. Many methods are effective in one's search, and this fact holds evident to our own differences, some use social interaction as a form of investigation, while others may find solitary confinement as a more productive approach. Through my own personal path to clarity and understanding, it has proved invaluable to myself that the reading of literature and poetry has a profound effect upon fulfillment. By associating oneself into the thoughts and theories of the writer, one can gain an insight into their personal condition. Robert Frost includes much thought and examples into his own behavior as well as others. Through the analysis of Robert Frost's poetry, one attains an insight into oneself, and a deeper perspective of the human condition. Poems such as "The Death of a Hired Man", "The Road Not Taken", and "Stopping by Woods on a Snowy Evening" all are incorporated with his thoughts of the natural human condition, and delve into his own definitive bearing.Poetry, he wrote, was "one step backward taken," resisting time-a "momentary stay against confusion."(Baym 1116) The confusion that Frost recalls is the chaos that is included in the search for oneself, and poetry to him was an elapse from the confusion. Itgave him comfort to read and write of his thoughts, emotions, and beliefs, and analyze them in a humanistic nature that many could relate to and enjoy. In the 1930s when writers tended to be political activists, he was one whose old-fashioned values were inappropriate, even dangerous, in modern times. Frost deeply resented this criticism, and responded wit h a new hortatory, didactic kind of poetry. (Baym1116) This style of poetry created an atmosphere that urged the reader to generate perception into the moral subject and envision the meaning behind them. Frost shared with Thoreau and Emerson the belief that everybody is a separate individuality and that collective enterprise could do nothing but weaken the self. (Baym 1116) This theory that Frost shared with the famous transcendentalists conveys that he was a firm believer that one's freedom of others is essential the development for the further understanding of oneself. To many transcendentalists, the pure act of coexisting within nature as an entity, creates a sense of closeness and spirituality within the human mind that is open to hear it. Frost opens the eyes of many to the griefs of country life in "Death of a Hired Man", where he explores the humanistic conditions of belongings, empathy, intolerance, and dignity. Mary and Warren's farm was Silas' only place to call home, where he knew he would always be accepted even if he weren't welcome. Home is the place where, when you have to go there, they have to take you in. (Frost 1122) This was home for Silas, even if his rich brother lived thirteen miles away, who was a "somebody", Silas wouldn't be made ashamed to please his brother. This powerful and sound dignity stressed by Frost, exemplifies his stern belief to uphold one's own pride in oneself. Also, Silas wanted to return with one other wish than to ditch the meadow, he told Mary that he wants to teach Harold, to pass on his one true talent. The human need of belongingness isvery evident within Silas as he hopes to pass on his skill and teach his wisdom to others, to belong and to have something to belong in. He t hinks that if he could teach him that, he'd be some good perhaps to someone in the world. (Frost 1122) Silas wanted to have a last hope for himself, to save his last self-respect. Silas is a character that Frost uses very well to convey his personal ideals of the effect that belongingness has on deprived humans.Another character that Frost portrays to the reader as certain

HBC Georges T-shirts Example

HBC Georges T HBC Georges T Darden Business Article 10thOctober George’s T-Shirts George Lassiter is said to be a project engineer. He is also managing an interesting sidebusiness on behalf of designing and manufacturing variety of T-Shirts for different occasions. It could be for the purpose of fund-raising or a special even like a musical concert for a renowned music artist. However, these T-shirts were not allowed to be sold with the boundaries of the arenas, where the events like concerts will be held. Furthermore, the T-shirts are perfectly designed and manufactured as well. They are also well priced and sold in the surrounding streets associated with arenas such as parking lots, etc. For this purpose, George obtained proper license from the local authorities to sell T-shirts in the local surroundings. Problem IdentificationIn this particular case of George’s T-Shirt, we have analyzed that George don’t have any proper track record in regards to past data, so he can perform the analysis or you can say forecast the future sales on behalf of his T-Shirts. He is not very realistic in terms of identification of number of T-Shirts to be sold. You can say that he doesn’t have the exact information in regards to how many people will be attending the concert, so he can manufacture the required number of T-shirts on the basis of certain percentage, which he has taken around 10% of overall total. If there will be 75,000 people attending the concert, then on the basis of above mentioned percentage, there will be 7,500 T-shirts will be sold. Solution to the George’s Problem According to the 2000 book, On Target: The book on Marketing Plans, by Berry, Tim and Wilson, Dough â€Å"when you have previous data to call on, so you can use it, further you can compare your forecast data with the past results, and look to the past as a reality check. You can understand what is changing, why, and what may remain the same. Basically, a forecast-to-past comparison is said t o be a quick practical and very powerful analysis as well.†In conclusion, I would say that one should have properly maintained past data, so it can be compared with the forecasted values. You can easily derive your desired values by doing such analysis. Berry Tim, Wilson, Dough. "On Target: The book of Marketing Plans." Eugene. Palo Alto Software Publications, (2000): 70. Document.

Design and construction of a prestressed concrete tank Literature review

Design and construction of a prestressed concrete tank - Literature review Example The principle behind the prestressed concrete tank is that the compressive stresses induced by the high-strength steel tendons inside a concrete member prior to the loads being applied will balance tensile stresses inflicted in the member during the service. It`s recognized that prestressing eliminates several design limitations and conventional concrete places on load and span and allows the building of roofs, bridges floors, and walls with elongated unsupported spans. With this in mind, architects and engineers design as well as build lighter concrete tanks without sacrificing strength. This principle behind prestressing in concrete tank can be illustrated in a row of books being moved from one place to another. Instead of vertically stacking the books and carrying them, they may perhaps be shifted in horizontal position by putting pressure to the books right at the end of row. Whenever sufficient pressure is applied, the compressive stresses are induced all over the entire row, an d so the whole row can always be carried and lifted horizontally at once. This principle has been applied to the design and construction of concrete tank. Concrete water tanks are broadly used in today’s society as a results of the endless need to have potable water easily accessible. Concrete water tanks are used for several purposes such as the storage of potable water, rain water harvesting and even for agriculture irrigation. They are comparatively easy to construct and they have numerous advantages compared to other tanks of different materials such as plastic or steel. Concrete tanks have bigger life spans, they can always be built bigger compared to their counterparts, they don’t taint water and besides, they can always be buried underground. Having a concrete tanks buried underground performs an aesthetic purpose and a practical one since it keeps the water cool. Consequently, the tank will have much less algae growth. A lesser algae growth implies fewer pump p roblems. Normally potable water tanks are built with prestressed concrete for purposes of durability and water tightness. Literature review As with all sorts of liquid-retaining constructions the fundamental problem of the design is not simply one of securely supporting the load, but is of creating a form that stays liquid-tight under service conditions. Consequently, leakage where it occurs happens more regularly from defects in detail and/or workmanship than from direct result of an inadequate design. In the prestressed cylindrical concrete tank, the enclosed liquid stimulates ring tension in horizontal section and also generally some bending in vertical section. Vertical and Horizontal stressing are applied as obligatory to offset these effects. In a form of this kind, they have the advantage that the central concrete shell is exposed to minimum situations of stress under complete load from the enclosed liquid. The base of the calculations for structures of this sort is simple. H owever, the application results, in practice, to possible disparity in interpretation. The provided degree of restraint at the wall foot possesses a controlling effect on the allocation of stress in the tank wall. The

A survey of one Financial Market Anomaly (e.g. The Momentum Effect and Essay

A survey of one Financial Market Anomaly (e.g. The Momentum Effect and Market Efficiency) - Essay Example Anomalies specify either market ineffectiveness or insufficiencies in the fundamental asset-pricing model. Contextually, market anomaly is regarded as a price and return miscalculation on financial market which appears to oppose ‘efficient market hypotheses’ (Schwert, 2002). This report is based on the survey of one financial market anomaly named ‘turn-of-the-year’ effect. The objective of the report is thus to recognise and describe the reasons for the occurrence of turn-of-the-year anomaly. Furthermore, the report also aims to understand how this anomaly influences the aspect of market efficiency. Definition of Turn-of-the-Year Anomaly The turn-of-the-year effect defines an outline of increased trading quantity and higher stock prices in the year end (i.e. last week of December) and in the beginning of year (i.e. the first two weeks of January). According to Keim (1983) & Reinganum (1983), majority of irregular revenues generated by small organisations hap pens during the first two weeks of January. This anomaly is recognised as turn-of-the-year effect. In this context, Roll (1983) had theorised that higher unpredictability of little capitalisation stocks cause substantial short term capital losses. Most of the investors hence desire to realise income tax before year end. This stress leads to more sales of stock in the end of year, resulting in substantial minimisation of prices of small capitalisation stocks (Schwert, 2002). Pattern of Turn-of-the-Year Anomaly The study of the Return on Investment (ROI) of US along with other key financial markets constantly discovered robust dissimilarities in stock yielding behaviour across the year. The following figure hereby illustrates the average ROI on monthly basis from 1927 to 2001 in the US: Source: (Stern School of Business, 2012) From the above figure, it can be observed that the returns on investment in January from 1927 to 2001 were considerably higher in the US in comparison to the re turn of other months. This pattern of returns can be observed in the first two weeks of January. To be stated, the turn of the year effect was much more noticeable for small organisations in comparison with big organisations (Stern School of Business, 2012). However, the turn-of-the-year anomaly was learnt to b only existing in those markets where individual income taxes are active. In the similar context, the pattern of the stock markets of Hong Kong did reveal a turn-of-the-year effect owing to the fact that there were no capital gains from taxes. Similarly, in China the capital gains on taxes are considered as uniform which does not offer any kind of inducement for investors during year ends. Thus, turn-of-the-year anomaly is hardly observed in China as well as in Hong Kong (Ji, 2008). Discovery of Turn-of-the-Year Anomaly The seasonal anomaly had been first identified by Sidney B. Watchel in the year 1942. Chronologically, in the year 1976, Rozeff & Kinney had documented the tur n-of-the-year effect in New York Stock Exchange (NYSE) for the first time. They had found that the average yield of

Not sure Essay Example | Topics and Well Written Essays - 1250 words - 3

Not sure - Essay Example claim that man maintains innate inclinations towards morality, which does not let him to go astray quite unbridled without being responsible to some Supreme Being, who has created His voice in every heart in the form of conscience in order to keep the seduction and temptation of the evil away from him. Human nature, according to this distinguished sage, and its impulses as well, if cultivated, turn into moral virtues. Our natures are, he argues, what heaven has given us (6A.15). Since heaven has created human nature in its own image, it has natural tendencies of inclining towards goodness ultimately. Thus, human nature even remaining indulged into the vice of various kinds, eventually inclines to the traits and characteristics attributed to it by birth. Human nature, Mencius further asserts, is what links us with the non-human universe, the normative order of heaven. Consequently, human soul has been created with the gifted moral values Nature looks for in human actions in one way or the other. Indeed, the quality of this relationship is such that Mencius is able to claim that â€Å"If one knows one’s nature, one will know heaven† (Makeham 2001). The same has also been preached by Mencius’ predecessor Confucius, and the very notion has always been endorsed and projected by the future philosophers and thinkers in their respective philosophical works. Illustrious moralist and sage of ancient Chinese civilization Confucius had preached virtue and compassion towards humanity without discrimination through his preaching. He submits that where there exists the razor of iniquity, inequality, evil and social injustice in a society, there is least probability of the blossoming of the plant of goodness, charity, honesty and wisdom, and vice versa (Yu 2012). The same was the notion promoted by the distinguished ancient Greek philosopher Socrates, who had declared having knowledge of the universal phenomena as a great virtue that protects humans from going astray and

Solenoid Operated Piston Pump Engineering Essay

Solenoid Operated Piston Pump Engineering Essay This project is aimed at analysing and designing a solenoid operated piston pump which is capable of delivering solution (this report assumes water) at a flow rate of 1 litre/min. However, the customer usage requires the flow rate to remain between 0.9 and 1.1 litre/min at an ambient pressure of about 1 bar. The operation mode of the piston pump is described below using the diagram: OscillPistonPump Fig 1.1 Solenoid Operated Piston Pump1 The solenoid coil (4) generates an electromagnetic field by the single wave diode rectified current flowing through the coil. Each current pulse moves the piston (5) against the pressure spring (3). This movement reduces the volume in the suction chamber causing an increase in pressure (P a 1/V), which opens the valve (6) in the piston, thereby allowing the liquid to run into the pressure side. When the current acting on the solenoid pulse is off, the pressure spring pushes back the piston toward the pressure side. The increase of pressure caused by the piston movement closes the piston valve (6) and the liquid flows through the valve (7) set in the pressure connection (8) and into the pressure pipe. The piston movement also simultaneously increases the volume in the suction chamber, thereby reducing the pressure below the chamber. The low pressure in the suction chamber opens the valve (2) set in the suction connection (1), and the liquid is sucked into the pump and the cycle starts again. The piston size and the length of its displacement define the flow rate. The pump will run without damage when the liquid flow is stopped momentarily1. This design concentrated on the piston, suction chamber and pressure springs design. Although references were made to the valves and solenoid force, engineering analysis were not carried out on them. CHAPTER 2 INITIAL ENGINEERING DESIGN ANALYSIS This section considered the engineering analysis of the operation of the piston pump to achieve the require specifications. The given specifications are; Flow rate Q = 1 Lit/min Frequency F = 60 cycles/sec Ambient Pressure = 1 bar Using the above specifications, the length of stroke of the piston, which is also termed as the â€Å"Swept Volume†, can be calculated using the relation below: Q = Volumetime=Volume Ãâ€"frequency = Ï€ d2 L4 Ãâ€"f ∠´L= 4QÏ€d2f Where: Q = Flow Rate =1 lit/min= 1.667 Ãâ€"104 mm3/sec f = Frequency (cycles/sec) L = Length of stroke/Swept volume (mm) d = Diameter of piston/suction chamber (mm) The diameter was varied from 1 to 20 mm and the corresponding lengths of stroke were obtained at different frequencies of 40, 45, 50, 55 and 60 cycles/sec. The results obtained were plotted (See appendix 1). After careful look, the frequency at 40 cycle/sec, so subsequent calculations would be based on this. It was also noticed that reasonable pair of dimensions of the diameter and length occurred around the diameters 5-10mm, therefore subsequent calculations were based on this range. 2.1 LOAD ANALYSIS The load analysis was carried out on each component designed as indicated below: A. Piston: The load analysis on the piston was done by isolating the piston and analysing the forces acting it. The different forces acting on the piston are as shown below: Force on piston causing acceleration Magnetic force from solenoid coil Resultant spring force Kinematic frictional force Gravitational force Resultant hydraulic force (including assumed viscous effect) This is assuming that atomic, initial static frictional force and temperature effects are negligible. The force analyses were carried out considering three different cases under which the pump operation can undergo. The intake and ejection strokes were also analysed separately to reduce complications. The difference between the intake and ejection stroke is that, the magnetic force from the solenoid is zero during ejection, because the solenoid is off: Case I: This is when the piston pump is used horizontally, that is, it is used to pump fluid on the same datum. This means that the gravitational effect and the height difference in the hydraulic force will be zero. The relationship between the forces will therefore be: Intake stroke: Force causing motion = Force from solenoid Resultant spring force Resultant hydraulic force Frictional force Ejection stroke: Force causing motion = Resultant spring force Resultant hydraulic force Frictional force Case II: This considered the case when the pump is used to transfer fluid from a higher level to a lower level. This means that the gravitational effect will favour the direction of flow therefore reducing the force needed to drive the piston. The relationship between the forces will therefore be: Intake stroke: Force causing motion = Force from solenoid Resultant spring force Resultant hydraulic force Frictional force Gravitational force Ejection stroke: Force causing motion = Resultant spring force Resultant hydraulic force Frictional force + Gravitational force Case III: This considered the case when the piston pump is used to deliver fluid from a lower level to a higher level. The difference between this case and case II is in the gravitational effect and the datum difference in the hydraulic effect. The design load analysis was done under this circumstance because pumps are usually used for this particular purpose. Even with this design concept, the pump can still be used for other cases, but it might deliver fluid at a higher flow rate, which could still be in the boundaries of the given tolerance of the flow rate. The relationship between the forces will therefore be: Intake stroke: Force causing motion = Force from solenoid Resultant spring force Resultant hydraulic force Frictional force + Gravitational force Ejection stroke: Force causing motion = Resultant spring force Resultant hydraulic force Frictional force Gravitational force. The different forces were calculated as follows using the free body diagram of the piston shown below: Figure 2.1 Boundary conditions of intake and ejection strokes Force from solenoid coil= Fs Force on piston causing motion = Mpa Where Mp = mass of piston kg and a = acceleration of piston (mm/s2) Mp= Ï  Ãâ€"V Ï  = Density of material (Stainless steel) =8Ãâ€"10-6 (kg/mm3) V=Volume of fluid displced in one stroke mm3= Q Ãâ€"t= Qf where f=45 cycles/sec=90 strokes/sec (2 strokes=1 cycle) Mp= Ï  Ãâ€" Qf=8Ãâ€"10-6 Ãâ€" 1.667 Ãâ€"10490=1.482Ãâ€"10-3 From law of motion; v2= u2+ 2aS u = 0 ∠´a=v22S Also v= St= S Ãâ€"f v=Velocity (mm/s) and S= L=Length of stroke (mm) ∠´a=L Ãâ€"f22L= L Ãâ€" f22= L Ãâ€" 9022 The length was varied from 5 to 10 mm, and different accelerations were obtained (See appendix 2). Resultant spring force = K2∆x- K1∆x= ∆xK2- K1= ∆x∆K Where K1 and K2=Stiffness of springs 1 and 2 respectively (N/mm) ∆x=L=Stoke length (mm) Kinematic frictional force = ÃŽ ¼kÃâ€"N= ÃŽ ¼kÃâ€"Mpg Where ÃŽ ¼k=Coefficient of kinematic friction N=Normal force= Mpg g=acceleration due to gravity=9810 mm/s2 Gravitational force = Mpg Hydraulic force = Total Change in Pressure ∆P (N/mm2)Surface Area of Piston A (mm2) From Bernoulllis equation   P1Ï g+ V122g+ Z1= P2Ï g+ V222g+ Z2 ∆P= P1-P2=Ï V22-V122+ ∆ZÏ g Q= A1V1= A2V2 ,   then V2= QA2= A1V1A2 and V1= QA1 ∆P= Ï A1V1A22-V122+ ∆ZÏ g= V12Ï 2 A1A22- 1+ ∆ZÏ g ∆P= Ï  Q22A12A1A22- 1+ ∆ZÏ g Where Q= Flow rate (mm3/s) , Ï  =density of water =1Ãâ€"10-6 (kg/mm3) A1and A2=Area mm2   and V1 and V2=Velocity (m/s) ∆Z=L=Length of Stroke mm Including the discharge coefficient C = 0.98 to account for viscous effect, ∆P therefore becomes: ∆P= Ï  Q22C2A12A1A22- 1+ LÏ g ∠´ Hydraulic force = Ï  Q22C2A12A1A22- 1+ LÏ gSurface Area of Piston A mm2 = Ï  Q22C2A12A1A22- 1+ LÏ gA2- A1 The forces were algebraically added according the ejection stroke equation developed above (case III) to obtain ?K at different diameter of pistons, fixing inner diameter of Piston D2 (corresponding to A2) = 0.5, 1, 1.5, 2 and 2.5mm (See appendix 3). Force causing motion = Resultant spring force Resultant hydraulic force Frictional force Gravitational force. Mpa= L ∆K- Ï  Q22C2A12A1A22- 1+ LÏ gA2- A1- ÃŽ ¼kMpg- Mpg ∆K= 1LMpa+ ÃŽ ¼kg+g+ Ï  Q22C2A12A1A22- 1+ LÏ gA2- A1 The hydraulic effect is due to the fluid forced out from the suction chamber into the outlet. Therefore the A1 and A2 will be the area of the piston and the outlet, corresponding to diameters D1 and D2 respectively. Also the outlet diameter was assumed to be equal to the inner diameter of the piston. The results obtained for difference in stiffness ?K above, were used to obtain the force from solenoid coil Fs using the injection stroke equation above. Also different diameter of piston were used while varying the inner diameter of piston D2 (corresponding to A2) = 0.5, 1, 1.5, 2 and 2.5mm (See appendix 4). Considering the intake stroke equation for case III: Force causing motion = Force from solenoid Resultant spring force Resultant hydraulic force Frictional force + Gravitational force Mpa= Fs-L∆K- Ï  Q22C2A12A1A22- 1+ LÏ gA1- ÃŽ ¼kMpg+ Mpg Fs= Mpa+ ÃŽ ¼kg-g+L∆K+ Ï  Q22C2A12A1A22- 1+ LÏ g A1 The hydraulic effect is due to the change in pressure as the fluid passes through the piston, because of the reduction in area. Therefore the A1 and A2 will be the area of the piston outer and inner diameter, corresponding to diameters D1 and D2 respectively. B. Pressure Springs: The load analysis of the spring was also done by isolating the spring and analysing the forces acting it. Considering the ejection stroke of upper spring (spring 1), the different forces acting on the spring are as shown below: Force on piston causing acceleration Spring force Resultant hydraulic force (including assumed viscous effect) This is assuming that the frictional force on spring is negligible because the surface area contacting the wall is small. Force causing motion = Spring force + Resultant hydraulic force Mpa= LÃâ€"K1+ Ï  Q22C2A12A1A22- 1+ LÏ g A1 K1=1LMpa- Ï  Q22C2A12A1A22- 1+ LÏ g A1 ∠´K2=K1+∆K Where Force on springs Fsk=KÃâ€"Length of stroke The values of stiffness of springs 1 and 2 were calculated using the relationships above at different outer and inner diameters of the piston. The graphs were plotted to see the variations (See appendix 5 and 6). C. Inlet Valve and Spring: Considering also the inlet valves and analysing the forces acting it, the injection stroke is caused by an increase in volume of the suction chamber, causing a corresponding decrease in pressure. Therefore the different forces acting on the inlet valve are given below: Inlet spring force at compression Resultant hydraulic force (including assumed viscous effect) This is assuming that the frictional force and gravitational force on the valve is negligible because the valve is light. Resultant Pressure Change= ?P From Gas Law: P1V1= P2V2 P1 and P2 are the initial and final pressures of both the inlet and suction chamber respectively (N/mm2). The initial pressure P1 is assumed to be equal to the external pressure which is given to be equal to the atmospheric pressure Pa = 1 bar = 0.1 N/mm2. That is why fluid is not flowing because there is no pressure difference, or P1 was higher than Pa P2= P1V1V2= PaV1V2 where V2=V1+Vs and Vs=Swept Volume per stoke Vs=Flow rateFrequency in stroke/sec=1.667Ãâ€"10490 =185.22 mm2/stroke P2= P1V1V1+Vs ∆P1=Change in pressure due to swept volume= Pa-P2 ∆P1=Pa-PaV1V1+Vs=Pa V1+Vs-PaV1 V1+Vs=PaV1-PaV1+PaVsV1+Vs=PaVsV1+Vs Where V1 = VT and it is the total volume of the inlet spring area, suction chamber and the inner space of the piston. ∆P2=Pressure Change due to area changes ∆P2=Ï  Q22C2A12A1A22- 1+ LÏ g The above pressure change is the sum of the pressure changes from the inlet through suction chamber and into pistons inner diameter. This is negligible because the pressure drops as it enters the suction chamber and increases as it enters the inner diameter of piston, thereby almost cancelling out. ∆P=∆P1=PaVsVT+Vs Hydraulic force=spring force at compression ∆P1A3=PaVsA3VT+Vs= K3x3 PaVs=K3x3A3VT+ K3x3A3Vs VT=PaVs- K3x3A3VsK3x3A3 Where A3=Inlet area mm2, K3=Inlet Spring Stiffness (N/mm) and x3=Spring movement=Valve lifting mm The values the total internal volume VT was obtained at different values of the diameter of the inlet D3 (corresponding to A3). The value of the spring force K3x3 was varied from 0.01 to 0.05 N and the variations were plotted to see an appropriate one (See appendix 7). 2.2 Component Design and Selection The component design has been carried out along with the load analysis shown above. The desired dimensions for different components were then selected after a careful study and analysis of the graphs plotted. The dimensions were selected based on those that satisfy the required specifications, reasonably able to be manufactured and can be selected from the manufacturers catalogue as in the case of the springs2. Below are the component dimensions: Solenoid: Solenoid Frequency: 45cycles/sec = 90 strokes/sec Force from solenoid coil: 108.8N Length of stroke: 7.367 mm Piston: Piston outer diameter: 8 mm Piston inner diameter: 2 mm Springs: Pressure spring 1 rate = 5.771 N/mm Force on spring 1 = Rate * length of stroke = 5.771 * 7.367 = 42.515 N Pressure spring 2 rate = 14.683 N/mm Force on spring 1 = Rate * length of stroke = 14.683 * 7.367 = 108.17 N From the above calculations and estimated values of the spring rates, the most accurate spring chosen from the compression spring catalogue are (see appendix 8 and 9): Spring 1: C6609150 Wire diameter: 1.02 mm Outer Diameter: 7.62 mm Free length: 15.88 mm Rate: 5.81 N/mm Spring 2: D22110 Wire diameter: 1.25 mm Outer Diameter: 7.55mm Free length: 17mm Rate: 15.03 N/mm Inlet: Inlet spring stiffness = 0.02 N/mm Inlet spring length = 9.804 mm Inlet diameter = 1.78 mm 2.3 Stress Analysis The stress analysis was carried out on just two components as shown below. This was because these are the two components whose failure affects the pump operation most. A. Piston: The two stresses acting on the piston are normal and shear stresses which is given as. Stress (N/mm2) sij= Force (N)Area (mm2) The notation is to differentiate between the direction and plane of action, where the first digit represents the plane of action and the second digit represents the direction of force. When the notations are different, it signifies shear stress and when the notations are the same it means normal stress. The force on the piston varies as the piston goes through the cycle, therefore the different forces and principal stresses were calculated as the spring compresses and stretches. This was shown in appendix 10 and 11, but the calculations of the maximum and minimum principal stresses at the springs peak are shown below. The principal stresses were calculated because they are the cause of fracture in a component3. Considering the piston and spring 1: Fig 2.2: Stresses acting on piston from spring 1 and wall3 s11= 0 because there is no horizontal force in that direction s12= Force from SolenoidSurface area of piston= Fsp Do Lp= 108.8pÃâ€"8Ãâ€"15=0.2886 N/mm2 Where D0=Outer diameter of piston mm, Lp=Length of Piston (mm) s22= Force from spring 1Outer Area-Inner Area= K1Lp4 Do2- Di2 s22=5.771 Ãâ€"7.367p4 82- 22= 42.51547.1239=0.9022 N/mm2 s21= 0 because there is no horizontal force in that direction Considering the piston and spring 2: s11= 0 because there is no horizontal force in that direction s12= Force from SolenoidSurface area of piston= Fsp Do Lp= 108.8pÃâ€"8Ãâ€"15=0.2886 N/mm2 Where D0=Outer diameter of piston mm, Lp=Length of Piston (mm) s22= Force from spring 2Outer Area-Inner Area= K2Lp4 Do2- Di2 s22=14.638 Ãâ€"7.367p4 82- 22= 107.838147.1239=2.2884 N/mm2 s21= 0 because there is no horizontal force in that direction The total principal stress which is the usual cause of fracture was calculated using the total normal stresses from the springs and the shear stress from solenoid. Total shear stresses: Ts12=s12 from Spring 1+ s12 from Sprig 2=0.2886+0.2886= 0.5772 Total normal stresses: Ts22=s22 from Spring 1+ s22 from Sprig 2=0.9022+2.2954= 3.1976 Therefore the principal stresses: s11s22- s(s11+s22)+s2-s122=0 0Ãâ€"3.1976- s(0+3.1976)+s2-0.57722=0 s2-3.1976s-0.3331=0 Principal stresses; smin=-0.101 N/mm2, smax=3.2986 N/mm2 B. Pressure Springs: The major stress acting on the spring is shear stress acting on the coils. The force and consequentially the shear stress on the springs vary as the piston deflection (i.e. length of stroke) increases and decreases. The various forces and shear stresses were calculated and the graph plotted (see appendix 12). But the calculation of the maximum shear stress, which occurs at the full deflection is shown below4: Fig 2.4: Force acting on spring4 Shear stress tmax= 8FDWpd3 Where F=Force on spring N D=Mean outer diameter of spring mm d=diameter of spring coil mm W = Wahl Correction Factor which accounts for shear stress resulting from the springs curvature W=4C-14C-4+0.615C C=Dd Considering Spring 1 Fmax= K1Ãâ€"Length of stroke=5.771Ãâ€"7.367=42.515 N/mm2 D=7.62 mm and d=1.02 mm ?C=Dd= 7.621.02=7.4705 W=4C-14C-4+0.615C= 4Ãâ€"7.4705-14Ãâ€"7.4705-4+0.6157.4705=1.1982 tmax= 8FmaxDWpd3= 8Ãâ€"42.515 Ãâ€"7.62Ãâ€"1.1982pÃâ€"1.023=931.113 N/mm2 Considering Spring 2 Fmax= K1Ãâ€"Length of stroke=14.638Ãâ€"7.367=108.17 N/mm2 D=7.55 mm and d=1.25 mm ?C=Dd= 7.551.25=6.04 W=4C-14C-4+0.615C= 4Ãâ€"6.04-14Ãâ€"6.04-4+0.6156.04=1.2506 tmax= 8FmaxDWpd3= 8Ãâ€"108.17 Ãâ€"7.55Ãâ€"1.2506pÃâ€"1.253=1331.119 N/mm2 CHAPTER 3 INITIAL MANUFACTURING DESIGN ANALYSIS 3.1 Dimensions The dimensions of all the main components; piston, springs, cylinder and valves had been obtained from the calculations and graphical analysis made above. However, the detailed dimensions of all components namely; pump body (left and right side), cylinder and liners, piston, springs and valves are shown in the CAD drawing in appendix 13. 3.2 Tolerances Tolerance for Stroke Length The statistical tolerance of the stoke length was calculated using integral method, which is much more effective than an additional tolerance. Given the tolerance of the flow rate as  ± 0.1litres/min, the tolerance of the frequency was assumed to be  ± 5 cycles/sec under normal distribution condition. The tolerance of the stroke length was calculated as follows: Standard deviation s=Tolerance3 Ãâ€"Cp where Cp=process capability index In general manufacturing industry, a process capability index (Cp) of 1.33is considered acceptable. Therefore Cp Flow rateQ=1  ±0.1 lit/min= 1.667 Ãâ€"104  ±1.667 Ãâ€"103mm3/sec   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   ÏÆ'Q=3.33 Ãâ€"1033 Ãâ€"1.33=8.356 Ãâ€"102 Frequency F= 45  ±5 cycles/sec (Assuming a Normal distributed variable)   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   ÏÆ'f=103 Ãâ€"1.33=2.506 Therefore the flow rate and frequency could be written as; Q ~ N 1.667 Ãâ€"104 , 8.356 Ãâ€"102 mm3/sec f ~ N 45 , 2.506 cycles/sec Q = Volumetime=Volume Ãâ€"frequency = Ï€ d2 L4 Ãâ€"f ∠´L= 4QÏ€d2f Using differential tolerance: ÏÆ'∅2= i=1n∂∅∂xi2 ÏÆ'xi2 ÏÆ'L2= ∂L∂Q2ÏÆ'Q2+ ∂L∂f2ÏÆ'f2+ ∂L∂d22ÏÆ'd2 ÏÆ'L2= 4Ï€ 1ÃŽ ¼d2 Ãâ€"ÃŽ ¼f2ÏÆ'Q2+ ÃŽ ¼QÃŽ ¼d2 Ãâ€"ÃŽ ¼f22ÏÆ'f2+ ÃŽ ¼QÃŽ ¼d3 Ãâ€"ÃŽ ¼f2ÏÆ'd2 Ãâ€"2 ∠´Tolerance=ÏÆ'3 Ãâ€"Cp The standard deviations and tolerances of the stoke length were calculated using the above equations, while varying the diameter from 1 to 20 mm, and the results were plotted out (see appendix 14). Tolerance for Piston Principal Stress Assuming a normally distributed around the maximum principal stress acting on the piston, the standard deviation and the tolerance of the maximum principal stress was calculated using the load distribution obtained in appendix 11. ∠´3ÏÆ'=3.2918-0.5772=2.7146 Tolerance=CpÃâ€"3ÏÆ'=1.33Ãâ€"2.7146=3.6104 N/mm2 Upper and lower limit=3.61042= ± 1.8052 N/mm2 Tolerance for Springs Shear Stress Also assuming a normally distributed around the maximum shear stress acting on the springs, the standard deviation and the tolerance of the maximum shear stress was calculated using the load distribution obtained in appendix 12. For spring 1: ∠´3ÏÆ'=931.113-0=931.113 Tolerance=CpÃâ€"3ÏÆ'=1.33Ãâ€"931.113=1238.38 N/mm2 Upper and lower limit=1238.382= ± 619.19 N/mm2 For spring 2: ∠´3ÏÆ'=1331.119-0=1331.119 Tolerance=CpÃâ€"3ÏÆ'=1.33Ãâ€"1331.119=1770.39 N/mm2 Upper and lower limit=1770.392= ± 885.195 N/mm2 3.3 Fits The components that are fitted into the cylinder, namely; cylinder liner, piston springs 1 and 2 are almost of equal diameter. But because of the consideration of the fits and limits to give some allowance a transition fit was chosen from â€Å"Data Sheet 4500A British Standard selected ISO Fits-Hole Basis†. Since it fell in between the nominal size of 0 6 mm, the transition fit selected was H700.015 for the hole and k60-0.009 for the shaft5. 3.4 Material Selection Piston and Cylinder The piston and the cylinder are to be made of stainless steel grade 431. This is due to the prevention of fracture which could be caused by principal stress. From the maximum principal stress obtained for the piston above (3.2986 N/mm2 = 3.2986 MPa), it is sure that the material which has a yield strength of 655 MPa will be able to prevent failure. Also the other reason for choosing this material is because of its high resistance to corrosion6. Since the piston and cylinder interacts with the fluid, which increases the tendency for corrosion to occur, it is quite safe to use a highly corrosion resistance material like this. It is also very easily machined in annealed condition. The properties of the stainless steel grade 431are shown in appendix 156. Springs The springs are to be made of stainless steel grade 316. This is also due to the strength of the grade in preventing fracture, breakage and buckling of the spring due to the shear stress acting on it. From the maximum shear stress calculated above (1331.119 N/mm2 = 1.331 GPa), it is sure that this grade of stainless steel with an elastic modulus of 193 GPa will be able to withstand the compression. The material is also highly corrosion resistant and relatively easy to machine. The other properties of the stainless steel grade 316 are shown in appendix 156. Valves The valves are to be made of polytetrafluoroethylene PTFE, which is a thermoplastic. This was chosen because the material has to be light and can easily float. Also, it has very low coefficient of friction, which reduces the fluid drag force and wears on the piston and spring. 3.5 Surface Finish The surface finishing chosen for the manufacturing of the parts was to be 0.8  µm Ra. This is to reduce friction and rate of wear, because there are lots of parts moving against each other. The grinding process requires a very great accuracy because it is a relatively delicate manufacturing process. 3.6 Geometric Tolerance In obtaining the tolerance of the components, since algebraic addition of tolerances is very unrealistic and will not be efficient, the tolerances of components that fit into each other were taken from the â€Å"Data Sheet 4500A British Standard selected ISO Fits-Hole Basis†5. These are show below S/No Parts Dimensions (mm) Tolerances (mm) Drawings 1 Cylinder 11.00 + 0.015 2 Cylinder liner 8.00 0.009 3 Piston 2.00 0.006 4 Spring 1 17.00  ± 0.0015 3.7 Process Selection The manufacturing processes of the various parts of the pump will be very important aspects of the design.The parts to be manufactured are pump body, cylinder liners and piston. It will take a great deal of accuracy in carrying out the process, because the geometry of the parts is very delicate. Any wrong dimension will affect the output or operation of the pump. There are three steps in manufacturing the components mentioned above. Firstly, all the components would be manufactured by casting, which would probably not give the accurate dimensions. Then a turning/boring process can then be carried out, using a CNC or lathe machines, to achieve better dimension. The last process is the surface finish, which gives a smoother and precise dimension. It is relatively easier to manufacture the components by this method because of the intricacies of the geometry and dimensions, and also the materials chosen are easily machined. The manufacturing process of the springs would not be considered in this report because they are provided by suppliers. CHAPTER 4 DESIGN OPTIMISATION 4.1 Component Manufacturing Risk Assessment Component Name Pump Body (Left Right Side) Calculation of qm Drawing number 001 mp = 1 Ãâ€" 1.6 = 1.6 gp = 1.7 Ãâ€" 1 Ãâ€" 1 Ãâ€" 1 Ãâ€" 1.1 Ãâ€" 1.1 = 2.057 Ajustable tol= Design tolmpÃâ€"gp = + 0.0151.6 Ãâ€"2.057=+0.00455 tp = 1.7Ãâ€"1 = 1.7 sp = 1 Ãâ€" 1.3 = 1.3 qm = 1.7 Ãâ€" 1.3 = 2.21 Manufacturing variability risk, qm = 2.21 Material 431 Stainless Steel Manufacturing Process Turning/Boring Characteristic Description Holes at centre to edge Characteristic Dimension 8 mm Design Tolerance + 0.015 Surface Roughness 0.8 µm Ra Component Name Piston Calculation of qm Drawing number 005 mp = 1 Ãâ€" 1.6 = 1.6 gp = 1 Ãâ€" 1 Ãâ€" 1 Ãâ€" 1 Ãâ€" 1 Ãâ€" 1.1 = 1.1 Ajustable tol= Design tolmpÃâ€"gp = 0.0061.6 Ãâ€"1.1=0.0034 tp = 1.7Ãâ€"1 = 1.7 sp = 1 Ãâ€" 1 = 1 qm = 1.7 Ãâ€" 1 = 1.7 Manufacturing variability risk, qm =1.7 Material 431 Stainless Steel Manufacturing Process Turning/Boring Characteristic Description Holes at centre to edge Characteristic Dimension 2 mm Design Tolerance 0.002, -0.008 Surface Roughness 0.8 µm Ra  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The values of the component manufacturing risk analysis obtained above are considerably with a low risk. This shows that the processes chosen for the manufacturing of the components are acceptable. 4.2 Failure Mode and Effects Analysis (FMEA) The failure mode and effects analysis (FMEA) is an analytical technique performed to ensure that all possible failure modes of the piston pump have being identified and address. Below are the predicted failure modes of each components of the piston pump, the caused, effects and the suggested solutions: It can be seen from the FMEA above that the spring breakage has the greatest severity, but the wear on all the components has the greatest risk priority number. This is because wear would be experience by the customer over time of use which made the risk priority number very high. Therefore, while desig

Narrative and Opinion in Notes of a Native Son Essay -- James Baldwin

Choices James Baldwin is considered to be one of the great writers of modern time. There are many characteristics of his writing that could be used to show his talent but the one that is most often cited is his ability to interweave narrative and opinion seamlessly into his essays. One example of this ability is in his â€Å"Notes of a Native Son† essay. He interweaves narrative of his father and his death with his opinions about the relationship between blacks and whites at that time. James Baldwin uses contrasting ideas such as public vs. private, father vs. son, and past vs. present to switch back and forth between the narrative and his opinions. The major contrasting idea that Baldwin uses in the essay is the contrasting idea of public life vs. his own personal private life. The first paragraph starts by giving the date of his father’s death, then moves to telling about the Detroit riots and then brings them together in the end of the paragraph by stating that they â€Å"†¦drove my father to the graveyard through a wilderness of smashed plate glass† (63). This shows how both their personal life had been ‘shattered’ and also the town around them. But this is only a hint of how Baldwin switches between his personal, private life and his public life in society. However, he always manages to pull what seems like two completely opposite ideas together into one combined thought. By drawing similarities between his public life and his private life, Baldwin is able to create the sense that the problems facing society were very similar compared to those that he faced on a personal level. Be cause of this Baldwin is able to make his opinions apply to the reader on a more personal level. The best example of Baldwin usi... ...art when taking a stance on an issue. That way you are sincere in your decision and you stand behind it. But he is also saying in the rest of the essay that when you are deciding if you should take a side or when you decide what side you are going to take, you must not rely on merely the past or the present. You must not merely on the word of society or the word of your private family. And you must not rely on the words your father says because you are his son. You must look at the entire picture, both past and present, both public and private, and both your thoughts and your father’s when you make a decision on a subject. Only in this way will the world ever be fair and just, and without racial tensions. Works Cited Baldwin, James. â€Å"Notes of a Native Son.† 1955. James Baldwin: Collected Essays. Ed. Toni Morrison. New York: Library of America, 1998. 63-84.

Effective and Ethical Leadership Essay

Page 2. Throughout the evolution of modern business, leaders have strived to be effective and profitable. However, due to unprecedented business scandals throughout the past decade, strict adherence to the principles of business ethics has become more prominent and expansive than ever before. In light of scandalous and unethical business practices, as exuded by Enron and WorldCom for example, business leaders and governing agencies realize the importance of ethical behavior. Although there is not a clear cut or standard set of attributes that constitute an effective and ethical leader, there are several common aspects that can be identified. The most important attributes of an effective and ethical leader are trustworthiness and accountability. Employees must feel that they can trust their managers in any and every situation. Team members must believe that a manager has immaculate intentions for the well-being of the project and the team. Employees will work harder towards the goals of the organization as well as towards the goals of individual assignments if they feel that management is looking out for their best interests. Team members should not look at business management as an entity of oppression. Employees should be able to approach managers without intimidation or prejudice. In other words, workers should feel free to address concerns and express opinions. Experienced front line workers are more privy to minute details regarding the daily operations of the business. A worker that trusts his or her superior is more likely to express opinions and concerns that can enhance business activity or correct errors. Employees that trust the management of the organization will be more willing to work diligently towards the company’s goals. Employees that do not have a trustworthy management team can suffer from a reduction in morale. Overall, a lack of trust leads to a distant and less productive work environment. Page 3. Another equally important attribute of an effective and ethical leader is accountability. Effective managers should not be afraid to admit when they are wrong. Even the best managers make mistakes. In essence, a manager with a strong ethical track record will be able to address tough questions with realistic answers. Transcending departmental and hierarchal barriers, accountability promotes communication throughout the entire organization. For example, after years of slumping car sales coupled with rigid hierarchal divisions, Ford Motors decided to embark in a new direction with Alan Mulally as CEO in 2006. Throughout its century of existence, Ford â€Å"developed a very tall hierarchy, composed of managers whose main goal was to protect their turf and avoid any direct blame for its plunging car sales (Jones 2010). Even the COO Mark Fields stated that â€Å"at Ford you never admit when you don’t know something (Jones 2010). † New CEO, Alan Mulally, diligently worked to demolish the communication barriers between the divisions of production and to develop new ethical norms. For instance, he instituted weekly meetings where department heads were encouraged to openly share problems. Mulally promoted a new culture that was more accepting and open about mistakes. Moreover, sharing all a spects of production information through a universal lens can help to promote decreased production costs on a company-wide level. Organizations will prosper under a management that promotes and radiates accountability and trustworthiness. Employees are more prone to open lines of communication with trusted superiors. Managers that can accept responsibility for errors while co-piloting new plans of attack on pertinent issues can help to eliminate unnecessary depletion of organizational resources. A corporate culture that is built upon these attributes will be poised for future success. Page 4. Works Cited Jones, G. R. (2010). Organizational Theory, Design, and Change (6th ed. , p. 14). Upper Saddle River, NJ: Prentice Hall.

Casualty Figure Chart for World War 1

Casualty Figure Chart for World War 1 Despite intensive research by historians, there is no- and there will never be- a definitive list of the casualties inflicted during World War I. Where detailed record-keeping was attempted, the demands of battle undermined it. The destructive nature of the war, a conflict where soldiers could be wholly obliterated or instantly buried, destroyed both the records themselves and the memories of those who knew the fates of their comrades. Estimating the Numbers For many countries, the estimated figures only vary within the hundreds, even tens, of thousands, but those of others- particularly France- can be over a million apart. Consequently, the numbers given here have been rounded to the nearest thousand (Japan is an exception, given the low number). The figures in this, and almost every other list, will differ; however, the proportions should remain similar and it is these (represented here as percentages) which allow the greatest insight. In addition, there is no convention as to whether the dead and wounded of the British Empire are listed under this umbrella title or by individual nation (and there is certainly no convention for those regions which have since divided).   How People Died Many people expect the deaths and wounds of World War I to have come from bullets, as soldiers were engaged in combat: charges into no mans land, struggles over trenches, etc. However, while bullets certainly killed a lot of people, it was aerial artillery which killed the most. This death from the skies could bury people or just blow a limb off, and the repeated hammerings of millions of shells induced illness even when the shrapnel didnt hit. This devastating killer, which could kill you while you were on your own territory away from enemy troops, was supplemented by new weapons: humanity lived up to its horrible reputation by deciding that new methods of killing ​were needed, and poison gas was introduced on both western and eastern fronts. This didnt kill as many people as you might think, given the way we remember it, but those it did kill died a painful and hideous death. Some say that the First World Wars death toll is used today as an emotional weapon used to cast the conflict in overwhelmingly negative terms, part of the modern revisionism on the war, which may be a completely dishonest way to portray the conflict. One look at the list below, with millions dead, over a war for imperial control, is telling evidence. The vast and scarring psychological effects of those who were wounded, or those who bore no physical wounds (and dont appear in the list below), yet suffered emotional wounds, must also be born in mind when you consider the human cost of this conflict. A generation was damaged. Notes on Countries With regards to Africa, the figure of 55,000 refers to soldiers who saw combat; the number of Africans involved as auxiliaries or otherwise is likely to include several hundred thousand. Troops were drawn from Nigeria, Gambia, Rhodesia/Zimbabwe, Sierra Leone, Uganda, Nyasaland/Malawi, Kenya, and the Gold Coast. Figures for South Africa are given separately. In the Caribbean, the British West Indies regiment drew men from across the region, including Barbados, Bahamas, Honduras, Grenada, Guyana, Leeward Islands, St. Lucia, St. Vincent, and Trinidad and Tobago; the bulk came from Jamaica. The figures are cited from The Longman Companion to the First World War (Colin Nicholson, Longman 2001, pg. 248); they have been rounded to the nearest thousand. All percentages are my own; they refer to the % of the total mobilized. Casualties of World War I Country Mobilized Killed Wounded Total K and W Casualties Africa 55,000 10,000 unknown unknown - Australia 330,000 59,000 152,000 211,000 64% Austria-Hungary 6,500,000 1,200,000 3,620,000 4,820,000 74% Belgium 207,000 13,000 44,000 57,000 28% Bulgaria 400,000 101,000 153,000 254,000 64% Canada 620,000 67,000 173,000 241,000 39% The Caribbean 21,000 1,000 3,000 4,000 19% French Empire 7,500,000 1,385,000 4,266,000 5,651,000 75% Germany 11,000,000 1,718,000 4,234,000 5,952,000 54% Great Britain 5,397,000 703,000 1,663,000 2,367,000 44% Greece 230,000 5,000 21,000 26,000 11% India 1,500,000 43,000 65,000 108,000 7% Italy 5,500,000 460,000 947,000 1,407,000 26% Japan 800,000 250 1,000 1,250 0.2% Montenegro 50,000 3,000 10,000 13,000 26% New Zealand 110,000 18,000 55,000 73,000 66% Portugal 100,000 7,000 15,000 22,000 22% Romania 750,000 200,000 120,000 320,000 43% Russia 12,000,000 1,700,000 4,950,000 6,650,000 55% Serbia 707,000 128,000 133,000 261,000 37% South Africa 149,000 7,000 12,000 19,000 13% Turkey 1,600,000 336,000 400,000 736,000 46% USA 4,272,500 117,000 204,000 321,000 8% Sources and Further Reading Broadberry, Stephen and Mark Harrison (eds). The Economics of World War I. Cambridge: Cambridge University Press, 2005.Offer, Avner. The First World War: An Agrarian Interpretation. Oxford: Oxford University Press, 1991.Hall, George J. Exchange Rates and Casualties During the First World War. Journal of Monetary Economics 51.8 (2004): 1711–42. Print.Hoeffler D. F., and L. J. Melton. Changes in the distribution of navy and marine corps casualties from World War I through the Vietnam conflict. Military Medicine 146.11 (1981). 776–779.  Keegan, John. The First World War. New York: Vintage Books, 1998.Nicholson, Colin. The Longman Companion to the First World War: Europe 1914–1918. Routledge, 2014.  Winter, J. M. Britains ‘Lost Generation’ of the First World War. Population Studies 31.3 (1977): 449–66. Print.

Skin Care Essays - Cosmetics, Eye Shadow, Lipstick, Human Skin Color

Skin Care Essays - Cosmetics, Eye Shadow, Lipstick, Human Skin Color Skin Care Throughout the late 1800's and until the present, cosmetics and skin care have been important in the lives of women in America. Certain trends have come and gone, just as some have remained. In the past 100 years, the roles and lives of women have changed drastically, but their cosmetics have always been around. Charm books along with step-by-step manuals give us today a look into the past. Advertisements are also a great source of history. Using these means, central themes in cosmetics can be determined, almost simply. Throughout the past century, pleasing your man, looking natural, and being a sophisticated, contemporary woman with a fresh young look, have been important to the cosmetic companies and to their female consumers. In the late 1800's, cosmetics were being produced and sold to college-aged women and older. However, a large hypocrisy was occurring. Women were being told that it was necessary to wear cosmetics, however, it was vain to wear noticeable make-up. It was quoted from St. Paul's Magazine that, "If a girl has the trial of a complexion so bad that the sight of it gives one a turn, it is simply a duty for her either not to go into society at all, or, if she does, to conceal it?you have no right to inflict your misfortunes on everybody-it is an unpardonable offense against good taste" (Williams 113). The women of this time were being bombarded with mixed messages. Their problems with this hypocrisy were settled to only wearing a light powder and rouge. Colors worn were usually corals and peaches because brighter colors would not provide the appropriate image that the woman was trying to convey. Their goal was to convey a natural glow that healthy women possessed. There were the years when women were slapping their cheeks and biting their lips to draw 'natural' color to their face. It was also quoted that, "Every college girl's room should be fitted with a mirror, so that even when immersed in her studies the young lady should not be negligent of her appearance" (Williams 113). Even 100 years ago, women were being forced to be aware of their appearance at all times. The early 1900's brought about a slight change in women's cosmetics. Lipsticks were the norm and mascara and eyeshadow were emphasized as necessary for eveningwear. This came about after the First World War. Also, in the 1920's, class lines were being broken. The flappers came out smoking cigarettes, cutting their hair, and wearing cosmetics that "did not harmonize their facial make-up" (Williams 134). Many other women followed parts of these trends and it was no longer possible to tell a woman's social position from her appearance. Then again in the 1930's, women went back to more natural and softer hues. Women were being told that the older they were, the more make-up they were using would help them look their best (Williams 147). The goal at this time was to keep your man guessing if your complexion was natural or not. Depilatories were used to remove unwanted hair sprouting from the face and bleaches were used to fade aging spots. Here, pleasing your man and reverting back to youth play an important role in the cosmetics being used by women. In the 1950's, charm and the essence of being a 'perfect little woman' were important. Inner beauty was seen as one's charm, where outer beauty was their passport to the world (McLeod 37). Step-by- step charm books gave women the instructions to be pretty and popular. Never forget, "perfect make-up is date bait" (McLeod 52). Home skin care remedies were used as well as following a strict daily regimen, including diet, hair care, and housework. Following a regimen was seen as good for one's health (McLeod 41). On into the 1960's, skin care was a big issue. However, many misconceptions were going around. Women were told that oily skin resulted from their improper mental attitude and improper breathing, just as dry skin was caused by poor function of the master gland (Jones 8). In the 1960's, the art of camouflage was necessary to perfect one's facial features and provide a natural look (Jones 32). Since skin care was such

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Art history - Research Paper Example During this period of time Vase painting goes through different styles and techniques in development which have replaced each other. This assignment will conduct a research regrading four objects of the pottery art of Ancient Greece. The purpose of the work is analyzing of two objects which belong to the Geometric and the Orientalizing periods plus 2 objects utilizing the black-figure and the red-figure techniques as well. The basic material for the production of pottery in Ancient Greece was simple plastic ferruginous clay, giving the fired pottery brick-red or pale yellow shade. Earthy colors were used for painting products, and the most wonderful one was a shiny black lacquer. The painting of antique products was produced on the wet clay, which required a lot of confidence and a skillful hand of the draftsman. Let’s trace the peculiarities of Geek vase painting evolution by detailed examining of the four chosen, according to the sequence of the mentioned periods in the history. The most striking view of the very early works of decorative art of Ancient Greece is made by the vases which are decorated with geometric traceries. So our first object belongs to the Geometric period of Greek pottery, which is expressive in its own way and very conditional in forms. It is the Heron Class Olla which is very similar to the Kylix, a vessel with a short neck and wide mouth, often supplied by two horizontal handles and used for wine storage. Originally it is rounded and convex, with time becomes more oval and flat. We can see the characteristic features of the whole period of art in this vase. They are the large geometrical patterns on the most space of the object, the typical decorations conducted with the help of a compass, circles and semicircles, alternating geometric design drawings established in different registers of patterns, separated from each other, enveloping the vessel with the horizontal lines. The other bright feature of Geometric period is the

Cremation Essay Example | Topics and Well Written Essays - 2250 words

Cremation - Essay Example However the remains are not ashes in the literal sense but they are dried bone segments. Cremation leaves the bones in fine sand like texture. These bone segments left are cremation are called as cremated bones. (1986) A place where modern day cremation occurs is called as crematorium (Cambridge , 2009). Crematorium usually consists of furnaces called as cremators and other facilities for handling of ashes. Cremation usually takes places in crematorium at very high temperatures of up to 870-980 C with special modifications to ensure the efficient disintegration of the corpse (L, 2005) . Europe which had earlier practised cremation of bodies abandoned the rite with the advent of Christianity which forbade cremation of bodies. The custom of earth burial came into vogue. It symbolised the burial of Jesus Christ and the day of Resurrection. (Kohmescher, 1999) However modern day Christianity permits cremation without violating its basic Christian norms and there has been a steady rise in this funerary practice form the mid 1960's especially in England , France , Italy and Switzerland. Skin and Hair are the first parts of the body which burn when a body is put to fire. During this phase 60-70% of the total body weight which is water vaporises due to intense heat. The loss of water causes muscles and tendons of the body to shrink. (L, 2005) When body burns further, the skeleton gets exposed when the soft underlying tissue disintegrates due to heat. Brain and ligament tissues are the last to be destroyed due to heat. Bones are however not destroyed at this heat, their composition and structure changes as there water content and collagen is destroyed and only mineral component is left behind. Bone crystal constantly increase in when heated up to 525 degree Celsius, and between the temperatures of 525 degree to 645 degree Celsius there is a sudden shift to a greater crystalline structure with a greater increase in the individual size of a single crystal. Above 645 degree Celsius there is no further change. After the cremation is over what remains behind are these dried out bone fragments that are altered in size and shape, both. Besides minerals these dried bone fragments also contain calcium phosphates. These cremated bone fragments are ash grey in colour and form about 2.5% (in children) to 3.5% (in adults) of the total body mass of the body. (Mays, 198) Information available