Vodafone Essay Example | Topics and Well Written Essays - 500 words

Vodafone - Essay Example Vodafone is a mobile system operator whose headquarter is in Newbury, England. It has been credited for being the biggest telecommunications network company all over the world with a market worth of close to hundred billion pounds. Currently, this company has equity benefit in twenty-five countries and associate network in forty-one countries. Vodafone’s current strategy in business is to develop through geographic extension, maintenance of present customers, attainment of fresh customers, and increase usage through technological innovation (McLoughlin and Aaker, 2010: 111). Vodafone’s results presented by the CEO on 19th May 2009 left everyone unimpressed. Before this report, it had been expected that the group would see free cash flow, increases in revenue, and adjusted profits (McLoughlin and Aaker, 2010: 111). Colao had been appointed as the CEO in July 2008with the intention that the company’s performance would boost significantly. Colao is currently employing strategies to improve Vodafone’s performance in the future. He intends to reduce costs by 1 billion dollars by the end of 2011. One of the current strategic issues is a revenue-boosting factor. This shall be guided by a push indented to convince more customers to purchase mobiles competent of linking to the internet (McLoughlin and Aaker, 2010: 111). A further strategy by the CEO is to trade telecoms services to other companies. There is a further strategy involving expansion of services to other countries. A resource based analysis of Vodafone involves an investigation of the capabilities and resources that results to its strengths and weaknesses. For a careful analysis of Vodafone’s current strategy, some essential issues affecting the company both externally and internally need to be examined. Some of these issues include political factors, infrastructure, economic factors, social-cultural factors,

Hospice in Rural Countries Research Paper Example | Topics and Well Written Essays - 1500 words

Hospice in Rural Countries - Research Paper Example Given the increasing statistical figures of families and patients who certainly will be facing the end-of-life crisis or issues, access to the hospice care has been a significant consideration. It has been found that the rural communities have been found to get the least access to the hospice care or a Medicare - certified hospice. In addition, the higher the number of physician found in the community shall likely to have easy access to the Medicare -certified hospice such as the urban or metropolitan. Moreover, the study shows that the number of physicians that can work in a Medicare-certified hospice can lower because of the need for the physician's certification of terminal illness. The findings show that the racial-ethnic diversity decreases from most rural places to least rural places or as the classification of the rural to urban communities progressed. The following is the table of the summary of the rural-urban, socioeconomic and physician rate variables. The computation of the median has been appropriate for this study to avoid enumeration of the numerous census data. The purpose of the calculation of the median is to approximate the middle value of every entry in the table such as the total number of the whites that resides in certain location. Table gives the reader an idea that on the average, the population of the whites living in a particular location is 84.4 or simply 84.4%. Table 1. Summary of the rate of available physician, socioeconomic, and rural-urbanclassification The above table provides the summary f the characteristics of the 3,140 counties. In 204, the census of the average county was 93,507 with the standard deviation of 304, 790. In terms of the median age of each county, on the average, was 37.3 years with the standard deviation of the 4.01. This means that the median age varies within the limits of + 4.01 and -4.01 values. The mean percentage of the population of the counties pertaining to those people who are above 65 years old was 14.76% and with the standard deviation of 4.17. On the other hand, the statistics pertaining to the people classified as under poverty line is 13.74% with the standard deviation of 5.59. The mean percentage of the minority groups such as the Hispanics and African Americans in counties were 8.76% and 6.18% respectively. The Hispanics mean percentage derives a standard deviation of 11.9 while the African Americans, 14.5% standard deviation value. Furthermore, according to the summary of characteristics of the particular counties, the physician rate reaches 12.61% with a standard deviation of 14.89. On the other hand, the mean quantity of the Medicare-certified hospice was 0.83 with standard deviation of 1.84. The significance of the values 18.99, 8.99, and 9.48 pertain to the rates of physician in the rural-urban classifications. This means that the metropolitan (most urban or least rural) has the most number of physicians qualified to work with the Medicare-certified hospice than the adjacent metro or rural areas (see figure 1). Figure 1. A comparison of MDs per 10,000 census, mean percentage of

Qualitative Cation Tests Essay Example for Free

Qualitative Cation Tests Essay Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Observations Questions A. Write net ionic equations for all reactions that produce a precipitate. Ag+(aq.) + Cl-(aq.) -ïÆ'   AgCl (s) 2 Ag+(aq.)+ 2OH- ïÆ'   Ag2O (s) + H2O(l) 2 Ag+(aq.)+2NH3+ H2O(l) ïÆ'   Ag2O (s)+ 2NH4+ (aq.) Pb2+(aq.)+2Cl- (aq.) -ïÆ'   PbCl2(s) Pb2+(aq.)+2OH-(aq.) -ïÆ'  Pb(OH)2 (s) Pb2+(aq.)+ 2NH3(aq.)+ H2O(l) ïÆ'   Pb(OH)2 (s)+ 2NH4+ (aq.) Cu2+(aq.) +2OH-(aq.) -ïÆ'   Cu(OH)2 (s) 2Cu2+(aq.)+SO42- (aq.) +2NH3(aq.)+2 H2O(l) ïÆ'   Cu(OH)2.CuSO4(s) +2NH4+ (aq.) Zn2+ (aq.)+ 2OH- (aq.) -ïÆ'   Zn(OH)2 (s) Zn2+ (aq.)+2NH3(aq.)+ H2O(l) ïÆ'   Ag2O (s)+ 2NH4+ (aq.) Fe3+ (aq.)+ 3OH- (aq.) -ïÆ'   Fe(OH)3(s) Fe3+ (aq.)+ 3NH3(aq.)+ 3H2O(l) ïÆ'   Fe(OH)3(s)+ 3NH4+ (aq.) Pb2+(aq.)+ CrO42-(aq.) PbCrO4(s) 2Cu2+(aq.)+[Fe(CN)6]4- (aq.) ïÆ'  Cu2[Fe(CN)6] (s) Zn2+(aq.) + S2-(aq) ïÆ'   ZnS(s) 4Fe3+ (aq.)+3[Fe(CN)6]4- (aq.) -ïÆ'  Fe4[Fe(CN)6]3 (s) Ca2+(aq) + ( COO)22-(aq) ïÆ'   Ca(COO)2 (s) B. Identify the cations that precipitate with hydrochloric acid and dissolve in the presence of ammonia. Ag+ C. Identify the cations that precipitate with hydrochloric acid and do not redissolve in the presence of ammonia. Pb2+ D. Identify the cations that precipitate upon addition of two or three drops of sodium hydroxide but redissolve upon addition of excess sodium hydroxide. Pb2+,Zn2+ E. Identify the cations that precipitate upon addition of two or three drops of sodium hydroxide and are not affected by additional sodium hydroxide. Ag+,Cu2+,Fe3+ F.Identify the cations that precipitate upon addition of two or three drops of aqueous ammonia but redissolve upon addition of excess aqueous ammonia. Ag+,Cu2+,Zn2+ G. Identify the cations that precipitate upon addition of two or three drops of aqueous ammonia and are not affected additional aqueous ammonia. Pb2+,Fe3+ H. What simple test would distinguish Ag+ and Cu2+ ? Upon addition of two or three drops of aqueous ammonia, Ag+ produces brown ppt, which is soluble in the excess reagent, resulting in clear, colorless solution. Upon addition of two or three drops of aqueous ammonia, Cu2+ produces blue ppt, which is soluble in the excess reagent but produces dark blue solution.

Orr-sommerfeld Stability Analysis of Two-fluid Couette Flow

Orr-sommerfeld Stability Analysis of Two-fluid Couette Flow ORR-SOMMERFELD STABILITY ANALYSIS OF TWO-FLUID COUETTE FLOW WITH SURFACTANT V.P.T.N.C.Srikanth BOJJA1* , Maria FERNANDINO1, Roar SKARTLIEN2 ABSTRACT In the present work, the surfactant induced instability of a sheared two fluid system is examined. The linear stability analysis of two-fluid couette system with an amphiphilic surfactant is carried out by developing Orr-Sommerfeld type stability equations along with surfactant transport equation and the system of ordinary differential equations are solved by Chebyshev Collocation method[1,2]. Linear stability analysis reveals that the surfactant either induces Marangoni instability or significantly reduces the rate at which small perturbations decay. Keywords:Linear stability, Orr-Sommerfeld, Marangoni mode, Amphiphilic surfactant. NOMENCLATURE A complete list of symbols used, with dimensions, is given. Greek Symbols Growth rate Surfactant concentration Mass density, [kg/m3]. Dynamic viscosity, [kg/m.s]. Height of perturbed inteface Surface tension Wave number ,Stream functions Latin Symbols Capillary number Marangoni number Number of Collocation pints Reynolds number Plate/Wall velocity Complex wave spped Width of fluid layer Amplitude of Pressure disturbance Amplitude of surfactant concentration disturbance Amplitude of interface perturbation Viscosity ratio Depth ratio Shear of basic velocity Velocity, [m/s]. Sub/superscripts Index i. Index j. Perturbed quantities Base state quantities INTRODUCTION Two layer channel flows and flows with and without surfactants have been given considerable importance because of its numerous industrial applications. Oil recovery[3], lubricated pipelining[4], liquid coating processes[5] are typical industrial situations where Two layer channel flows are often seen. Surfactants also have wide range of industrial applications for example in enhanced oil recovery[6]. Using Perturbation analysis, the primary instability of the two-layer plane Couette–Poiseuille flow was studied by Yih[7] and his studies revealed that even at small Reynolds numbers, the interface is susceptible to long-wave instability associated with viscosity stratification. Yiantsios Higgins[8] later extended this study for small to large values of wavenumber and confirmed the existence of the shear mode instability. Boomkamp Miesen[9] came up with the method of an energy budget for studying instabilities in parallel two-layer flows, where energy is supplied from the primary flow to the perturbed flow and instability appears at sufficiently long wave numbers through the increase of kinetic energy of an infinitesimal disturbance with time. In the presence of surfactant at the sheared interface, Frenkel Halpern[10,11] discovered that even in the stokes flow limit, the interface is unstable as the surfactant induces Marangoni instability, which was later confirmed by Blyt h Pozrikidis[12]. In the case of Stokes flow, they identified two normal modes, the Yih mode due to viscosity stratification inducing a jump in the interfacial shear, and the Marangoni mode associated with the presence of the surfactant. In contrast, at finite Reynolds numbers, infinite number of normal modes are possible and by parameter continuation with respect to the Reynolds number the most dangerous Yih and Marangoni modes can be identified. In this article, the effect of an insoluble surfactant on the stability of two-layer couette channel flow is studied in detail for low to moderate values of the Reynolds number. To isolate the Marangoni effect, gravity was suppressed in this problem and this was done by considering equal density fluids. Linear stability analysis was carried out by formulating Orr–Sommerfeld boundary value problem, which was solved numerically using Chebyshev collocation method[1][2] for all wavenumbers. Both Marangoni mode and Shear mode are detected and utmost focus is given to Marangoni mode as Shear mode is always stable at moderate to long wavenumbers under the influence of inertia. The rest of the paper is organized as follows. In  § Model description, the governing equations for the system in question are laid out, Normal mode analysis of the physical system is carried out, Orr–Sommerfeld boundary value problem is formulated. General description of Chebyshev collocation method and detailed description of numerical simulation of Orr–Sommerfeld boundary value problem by Chebyshev collocation method and validation of numerical method with literature data is given in  § Numerical method. Detailed discussion of results done in  § Results. The concluding remarks and outlook for further-work in  § Conclusions. Finally acknowledgements in and  §Acknowledgemnts. Model description Consider two super-imposed immiscible liquid layers between two infinite parallel plates located at, as in Fig. 1. Let the basic flow be driven only by steady motion of plates. It is well known that the basic ‘‘Couette’’ velocity profiles are steady and vary only in the span-wise direction and in the basic state, the unperturbed interface between the liquids is flat and is located at. The gravity is suppressed in this problem by considering equal densities in order to investigate the effects of surfactant and inertia on the stability of the system under consideration. The subscripts 1 and 2 refer to the lower or upper fluid, respectively and channel walls move in the horizontal direction, x, with velocities and. The interface is occupied by an insoluble surfactant with surface concentration which is only convected and diffused over the interface, but not into the bulk of the fluids thus locally changing the surface tension . Governing equations The mass and momentum conservation equations governing the two-layer system are , (1) Where subscript represents lower and upper liquid layers respectively. Here , Figure 1: Schematic sketch of Couette-Poiseuille flow with surfactant laden interface. The perturbed interface is shown as sinusoidal curve. is the concentration of insoluble surfactant. The associated boundary conditions for the system are no slip and no penetration boundary conditions at the walls. ,at and ,at The associated interface conditions are continuity of velocity, tangential stress and normal stress. Continuity of velocity at the interface , at The tangential and normal stress conditions at the interface are given by (2) Where are stress tensors, is unit normal, is unit tangent and Kinematic interfacial condition is The surfactant transport equation[13] at the interface is given by (3) Where is surface molecular diffusivity of surfactant. is usually negligible and neglected in this case. We introduce dimension less variables as follows , , , , The dimensionless variables in base state for the couette flow with flat interface and uniform surfactant concentration are given by , ( ) and , () Where is shear of basic velocity at interface and is given by We consider the perturbed state with small deviation from the base state: ,,,, Now we represent disturbance velocity in disturbance stream-functions and such that ,,, Performing normal mode analysis by substituting Where is wave number of the disturbance, and are constants, and is the complex wave speed. Linearizing the kinematic boundary condition yields . Linerarizing the dimensionless x and y-components of Navier-Stokes equation (2) followed by subtraction from the corresponding base state equations and elimination of pressure terms, yields two 4th order Orr-Sommerfield ODEs in stream-functions, one for each fluid. (4a) (4b) Where is the Reynolds number and . (when,) Boundary conditions at wall in terms of stream-functions are (5a) (5b) Continuity of velocity at interface gives , (5c) Linearization of normal stress condition gives (5d) Linearization of surfactant transport equation gives Linearization of tangential stress balance condition gives Where is the Marangoni number. By substituting the value of from linearized surfactant transport equation in linearized tangential stress balance condition gives (5e) For each value of Eqs. (4),(5) forms a eigen value problem, which was numerically solved using chebyshev collocation method[1,2] and QZ algorithm for determining the complex phase velocity . Numerical method The two Orr-Sommerfield equations eqs. (4) along with eight boundary conditions eqs. (5) are solved numerically using Pseudo-spectral Chebyshev collocation method[1,2]. To implement the Chebyshev method, we transformed each of the two fluid domains into standard Chebyshev domain that is Fluid 1 domain is mapped to and Fluid 2 domain is mapped to by substituting and respectively. Next, we represent each stream function as truncated summation of orthogonal Chebyshev polynomials by setting. and(6) Where and are unknown Chebyshev coefficients and N is the number of Cheyshev collation points in each domain. Upon substituting eq. (6) in eq. (4) and projecting them on to arbitrary orthogonal functions and respectively by taking the Chebyshev inner product, . these two Chebyshev inner products forms N-3 equations each summing up to 2N-6 equations and N+1 coefficients in and N+1 coefficients . 2N-6 equations along with 8 boundary conditions obtained by substituting eq. (6) in eq. (5) and 2N+2 coefficients forms a linear system Where, and,are square matrices of size 2N+2. This generalized eigen value problem was solved by QZ algorithm to obtain and subsequently growth rate, .We used, above which the eigen values are independent of number of collocation points. The accuracy of the Numerical method is checked by comparing current results with published literature[10] for the Two layer couette flow with an insoluble surfactant in stokes flow limit. To make this comparison, growth rates are calculated by muting the inertial terms by settingin the our code and with same parameters as in Halpern’s[10] Fig 2a and Fig 2b, where growth rates are predicted by long-wave evolution equation. Fig xxx shows excellent agreement between two numerical procedures. Figure 2: Dispersion curves for the most (a)Unstable Figure 3: Dispersion curve for the (solid line), (dashed line), at, ,, RESULTS and discussions Blyth and Pozrikidis[14] observed that in the Stoke’s flow limit, there exists two modes that govern the stability of a two-layer couette flow system with surfactant: the Marangoni mode and the Yih mode associated with surfactant and the clean liquid-liquid interface respectively. But on the other hand, in flows with inertia, there exists more than two normal modes. From Fig. 3, the broken line corresponding to is above the solid line, which corresponds to , it is evident that the surfactant in the presence of inertia has significantly reduced the rate at which small perturbations decay. Earlier stability analysis for stoke flow in presence of surfactant opens up a range of unstable wave numbers extending from zero up to the critical wavenumber .The neutral stability curve Fig. 4 for values (,, and ) is in accordance with the earlier stokes flow stability analysis and in addition at , a second small window of stable wave numbers appears to form an island of stable modes, wit h the island tip located at . In Fig. 5 we plot the growth rate of the Marangoni mode against the Reynolds number, up to and beyond, for , corresponding to the stable island tip. At, linear stability for Stokes flow predicts the growth rate, for the Marangoni mode. The present results confirms that the Marangoni mode at marks the inauguration of the lower stable loop. In Fig. 6 for a fixed Reynolds number , we show the dependence of the growth rates of the Marangoni mode on the wave number. The close-up near , presented in Fig. 6(b), shows that the Marangoni mode has negative growth rate for small band of wave numbers ranging from and has positive growth rate thereafter up-to , beyond which the Marangoni mode is stable again. These results clearly demonstrate the crucial role of the surfactant, which either provokes instability or significantly lowers the rate of decay of infinitesimal perturbations. Figure 4: Neutral stability curves for ,, and Figure 5: Growth rate vs. Reynolds number for the Marangoni mode for, , , , , Figure 6: Dispersion curve for the Marangoni mode (solid line) for,, , ,, (b) Zoom-in of (a) around Figure 7: Neutral stability curves for , , and (a) (b) (c) (d) (e) (f) Further, we investigated the effect of Marangoni number on the stability of the system under consideration via Fig 7(a) and this shows that in the devoid of surfactant that is at there is very small band of wavenumbers where the system is unstable for any Reynolds number. Moreover around the band of unstable wavenumbers is slightly larger than at any arbitrary Re. In presence of surfactant, Fig. 7(b)-7(e) a second small window of stable wave numbers appears to form

Jihad, Pakistan and India :: Politics Political Essays

Jihad, Pakistan and India Every person is entitled to his or her own opinion. Whether it is complimenting a new outfit or distrusting a society, people may think whatever they like. In the article â€Å"Jihadis† by Pankaj Mishra, different views on society are taken. From the opinions of Pakistani relationships with Indians, or the different outlooks on the Taliban takeover in Afghanistan, this article provides a detailed description of a person born in India but decided to change his life. The narrator, Mishra, is first introduced shortly after a brief setting of the Middle East before the tragic events of September 11, 2002. Described as being from India, he is now a London reporter writing various articles for English and American magazines. Through his encounters the reader receives an inside view on Middle Eastern life and history. Beginning with Pakistan’s governmental history, a foundation is set describing various ruling powers such as General Zia-ul-haq’s military takeover from Zulfikar Ali Bhutto in 1977 and the final Taliban takeover of Afghanistan in the 1990’s. The cruelty inflicted by these harsh takeovers is apparent by descriptions of â€Å"shutting down schools, smashing TVs, and VCRs, and tearing up photographs† (Mishra 103). Different reasons for supporting and joining the Taliban and other organizations are also explored. For example, a young man named Rahmat, felt he had no other choice but to join the Taliban in taking over Afghanistan after his father’s business was in ruins and his brother was in jail. After all the warnings, the Taliban offered him what he could not offer himself at that time: food and shelter. Trying to get an insider’s view on Taliban life, Mishra is escorted by Jamal, a befriended assassin.

Dr Jekyl And Mr Hyde - Chapter Summary :: essays research papers

Chapter 1The story begins with a description of Mr. Utterson, a lawyer in London. Mr. Utterson is a reserved, conservative man who does not reveal his true, vibrant personality. He tolerates the strangeness and faults of other. Early in his life, he watched as his brother fell to ruin, and it is noted that he is often the last respectable person that men who are turning to evil or ruin have to talk to. This foreshadows Utterson's involvement with upcoming evil.Mr. Utterson is friends with Richard Enfield, although the two are totally different from one another. They always took walks with each other on Sundays no matter what else they might have to do. As they walk down a lane on Sunday that would usually be crowded with merchants and children during the week, Enfield points out an old building without many windows, and only a basement door.Enfield tells a story of how, one night at about 3:00 am, he saw a strange, deformed man round the corner and bump into a young girl. The strange man did not stop but simply walked right over the young girl, who cried out in terror. Enfield rushed over and attended the girl along with her family. Still, the strange man carried on, so Enfield chased him down and urged him back. A doctor was called and Enfield and the doctor felt an odd hatred of the man, warning the man that they would discredit him in every way possible unless he compensated the girl. The strange man agreed to offer 100 British pounds.Enfield notes that the man is like Satan in the way he seems emotionally cold to the situation. The strange man presented a cheque signed by an important person, which they together cashed the next morning. Enfield states that he refers to the building as Black Mail House. Utterson asks Enfield if he ever asked who lived in the building, but Enfield explains that he doesn't ask questions about strange things:"the more it looks like Queer Street, the less I ask."The building appears lived in, and the two men carry on their walk. Enfield continues that the strange man he saw that night looked deformed, though he could explain how. Utterson assures Enfield that his story has caught his interest. The two agree never to talk about the story again.Chapter 2The same evening, Utterson came home.

Behaviors human

Behavior refers to an individual’s actions or reaction to a stimulus, which may be tangible (object, organism, etc. ) or intangible (thought, sound, smell, etc. ). There are various kinds of behaviors exhibited by human beings. Some are good and acceptable, while others are negative behaviors which could be a result of annoyance, irritability, exasperation and bothersome to a lot of people. The differences in behavior could be attributed to the influence of several factors such as culture, attitudes, values, ethics, and even genetics (Behavior, 2008).Nevertheless, people judge individual’s behavior based on their understanding, culture, norms, and other people’s influence on them. Each and every person has his or her own distinctive behaviors that can irritate, bother, and annoy other people. These types of behaviors can be seen and observed everywhere, such as in school, workplace, shopping malls, and other public places, and even at home. Thus, these unacceptab le, annoying, exasperating, and irritating behaviors can be encountered everywhere and are always inevitable to happen.For instance, in school, students exhibit behaviors that could bother and annoy someone, such as students who cheat during exams, copy homework of another classmate, and talk loudly and endlessly during class. Even teachers also display annoying or bothering behaviors. For example, teachers who give a lot of homework or are too strict could be annoying to some students and could extremely bother them. In the workplace, there are also a lot of unavoidable behaviors that one can display and can bother somebody, such as one’s co-workers or superiors.Behaviors such as constant tardiness, chatting, or talking too much during working hours, and gossiping, among others, could bring negative feelings to someone at work. At home, there could be countless behaviors of family members that can irritate another family member. There are parents, for instance, who are very strict and impose too many rules; there are also siblings who love to tease and bother their other siblings. The behaviors displayed by these people could be bothering or irritating for some family members.Finally, there are also annoying and irritating behaviors that can be observed in public places—behaviors that not only annoy, irritate, and bother someone but could also affect the environment and even the whole world negatively. For instance, throwing garbage or trash in improper places such as the street, cutting trees or illegal logging, dynamite fishing, and other reckless behaviors not only bother and annoy many people, but such behaviors also harm the environment. There are still a lot of negative and unacceptable behaviors that exist today and people exhibit all over the world.These behaviors may bring negative feelings to others, and they can sometimes destroy life. Among these bothering and irritating behaviors, some of them may be tolerable, while others can be i gnored. Behaviors that do not totally affect and hurt me as an individual can be ignored such as burping, eating without regard to proper table manners, and disobeying traffic rules. Furthermore, there are also behaviors that are tolerable, such imposing strict but necessary rules and teasing others. I find these behaviors tolerable because they do not hurt me physically, and I have the control whether I will let myself get affected by it or not.Moreover, some of these annoying behaviors can have good consequences, such as the imposing strict rules. On the other hand, there are just some behaviors that I cannot understand and tolerate at all that they make my blood boil every time I encounter them. First are the behaviors that harm the environment such as smoke belching, running factories that transmit chemicals, cigarette smoking, throwing garbage improperly, vandalizing public walls, and engaging in other illegal activities that can hurt the environment and living beings alike.I f ind these behaviors intolerable as it is not only me that may get affected by the effects of such behaviors, but there might be a lot of people in the world who may suffer and pay for such unbearable behaviors. In conclusion, there are a lot of behaviors that one can exhibit. Regardless of what they know, I think people judge behavior according to their beliefs and preferences. People demonstrate behaviors that may be acceptable or unacceptable for others, but what is deemed as acceptable and unacceptable varies from person to person. Reference Behavior. (2008). Answers. com. Retrieved January 30, 2009 from http://w