Nmgmt Essay Example | Topics and Well Written Essays - 750 words

Nmgmt - Essay Example geting but ‘orthodox’ planning approaches are insufficient for handling large-scale changes as opposed to incremental changes, according to Kotter and Cohen (2002). Significant structural changes had begun to take place in 1994 because of the arrival of free trade. Free trade in the UK’s market meant that foreign competition was coming and was providing local businesses with an opportunity to expand by means of acquisition. Charles Berry has quoted the response of his organization to the change. Even after everyone had agreed to a mutual point and the agreed suggestions were documented in a report, no real progress was made. Hence, all the planning efforts went down the drains because they were not put to work. Most of the industries are designed for incremental changes and commonly everyone associated knows about their business in some detail. Planning helps with such incremental changes where everyone is aware of the little details. However it is inadequate for managing large-scale changes. With non-incremental change, the analysis is often based on unclear assumptions because extrapolations from previous trends may be misleading. Charles Berry explains how his organization considered seven alternatives in an effort to evaluate the situation. In measurable terms, these included sales turnover, the number of employees, potential customer market, core business, competitors, beliefs and the proposed action steps. All the options were documented precisely and several meetings were conducted in order to visualize the propositions in a way that materialized the visions into a near reality. This provided a direction for the attainment of the vision and things got less vague. Hence, the approach , involving seeing, feeling, and changing, was particularly geared towards painting the picture or visualizing the future. There are four main elements involved in successful changes that occur on a large scale. These include plans, budgets, strategies, and visions.

A Briefe and True Report of the New Found Land of Virginia (1590) Assignment

A Briefe and True Report of the New Found Land of Virginia (1590) - Assignment Example sometimes â€Å"v† represents the /u/ sound as in â€Å"vnto.† Definitely, however, the culture did not care about the sound as much as they cared about the spelling. On the other hand, since the same word is spelled consistently like â€Å"watche† and â€Å"solemne,† it only seems that English culture may not be sloppy but may be one that favors someone in a hurry to take down notes. Due to the intricacy of the picture in terms of detail, it is possible that the engraver’s skill and tools were satisfactory. The artist’s skills may also be good enough as he was able to draw the Indian village using third-dimensional point of view. Through the publicists, people may learn that the people of the New World are rather peace-loving and united as a community. They will also be thought of as organized and religious. However, some Europeans may view them either as primitive because of their use of fire, or as fit to be used as slaves as they cultivate good plants like tobacco and corn. The Indians gather around a broad plot to meet with their neighbors, to celebrate their solemn feasts and to engage in merrymaking after the feast. The Indians also assemble themselves together to say their solemn prayers. There is also a place where they make fire to light up their feasts. The two observers made such observations and clearly and carefully documented the activities of the town of Secota because they wanted to somehow get a blueprint of what it is like to live among the Native Americans. The observers did this because they themselves wanted to establish a settlement in that place. To the Europeans, a clear understanding of the life of Native Americans is essential to building a long-lasting and harmonious relationship with them. The two observers provided realistic portrayals of Indian culture because they made such claims from an ordinary observer’s point of view. There were no details or explanations as to why the Indians were meeting their neighbors or conducting

Current Events and U.S. Diplomacy Essay Example | Topics and Well Written Essays - 750 words

Current Events and U.S. Diplomacy - Essay Example Thus a cold war erupted between the U.S. and USSR which eventually came to an end with the help of doctrinal regimes implemented by Reagan (Fischer, 1997). Define presidential doctrine and summarize the regional or global events during the Cold War leading up to the formation of the Reagan doctrine. Presidential doctrine defines the policies, procedures, reforms and initiatives taken by a country’s president which are intended to enhance global position of the nation and to achieve greatest good for citizens of own country as well as those across the globe. Before arrival of President Reagan, communism had become common and superpowers like Soviet Union were suppressing the Third World countries in attempt to invade them. The Soviet and the Vietnamese led various Marxist movements which depressed capitalism and eventually forced the entry of Cuban armies and Soviet troops into different territories including Angola, Cambodia and Afghanistan. These countries did not have suffic ient powers to hold the forces and hence turned to other countries for help. The U.S. which believed itself to be the savior and leader nation for all decided to intervene and rescue these countries through Reagan doctrine. This doctrine created waves of passion across nations and gave boost to conservatism in America (Carpenter, 2012). Describe the Cold War relationship that existed between USSR and the U.S. before Reagan doctrine was announced. Before Reagan, there were only two prevailing superpowers, the U.S. and the USSR, which considered their coexistence to be catastrophic and hence wanted to triumph over the other. The perceived equality of power of both nations had led everyone to believe that the two countries pose threats to each other. The mutual suspicion rose amongst the two parties and past experiences of World Wars led them to believe that dangers exist. Soviet Union was spreading communism which challenged the survival of capitalism in the U.S. Reagan rejected the i dea of control over European nations by the Soviet Union and claimed it to be unfair for USSR to exercise its rights outside its jurisdictional system and boundaries. Thus Cold War broke and Reagan introduced the Reagan Doctrine to stop communism by supporting and providing arms to the rebels and freedom fighters in Third World countries for self-defense (Katz, 1991). Describe the relationship that currently exists between the U.S. and USSR. The relationship between United States and the Soviet Union enhanced eventually after the Reagan doctrine. The leaders of Soviet Union realized soon that they essentially need the support of capitalist countries in order to flourish in the economic and business world. The greatest capitalist power is the U.S. and hence USSR has been keeping stable relationship with it and has signed various pacts to ensure peaceful relationships in field of politics, science and technology (Cox, 1990). The recent patterns of American-Soviet relationships are inc lined towards development in the fields of economic trade growth and mutually collaborative effort in scientific expansion. Describe the effect that the Reagan doctrine has had on regional or global affairs since the time when it was announced during the Cold War. When Reagan doctrine was introduced, the Cold War came to an end and relationships between U.S. and USSR were also improved. The Soviet Union retreated from all the territories and the world moved towards democratic and harmonious terms. Moscow no longer targeted

A Briefe and True Report of the New Found Land of Virginia (1590) Assignment

A Briefe and True Report of the New Found Land of Virginia (1590) - Assignment Example sometimes â€Å"v† represents the /u/ sound as in â€Å"vnto.† Definitely, however, the culture did not care about the sound as much as they cared about the spelling. On the other hand, since the same word is spelled consistently like â€Å"watche† and â€Å"solemne,† it only seems that English culture may not be sloppy but may be one that favors someone in a hurry to take down notes. Due to the intricacy of the picture in terms of detail, it is possible that the engraver’s skill and tools were satisfactory. The artist’s skills may also be good enough as he was able to draw the Indian village using third-dimensional point of view. Through the publicists, people may learn that the people of the New World are rather peace-loving and united as a community. They will also be thought of as organized and religious. However, some Europeans may view them either as primitive because of their use of fire, or as fit to be used as slaves as they cultivate good plants like tobacco and corn. The Indians gather around a broad plot to meet with their neighbors, to celebrate their solemn feasts and to engage in merrymaking after the feast. The Indians also assemble themselves together to say their solemn prayers. There is also a place where they make fire to light up their feasts. The two observers made such observations and clearly and carefully documented the activities of the town of Secota because they wanted to somehow get a blueprint of what it is like to live among the Native Americans. The observers did this because they themselves wanted to establish a settlement in that place. To the Europeans, a clear understanding of the life of Native Americans is essential to building a long-lasting and harmonious relationship with them. The two observers provided realistic portrayals of Indian culture because they made such claims from an ordinary observer’s point of view. There were no details or explanations as to why the Indians were meeting their neighbors or conducting

Cherokee nation Essay Example for Free

Cherokee nation Essay Wilma Pearl Mankiller was born on November 18th in Tahlequah, the capital of the Cherokee nation, Oklahoma. She lived in Mankiller Flats till she was ten years old. Then her family was moved to California when the Indian Affair Relocation program took place. Her father Charlie Mankiller was a Cherokee whereas her mother Irene Mankiller was of Dutch-Irish origin. Wilma had four sisters and six brothers. Wilma’s great grandfather was one of the many Cherokees who along with Choctaws, Creeks, and other Indian tribes moved along the Trail of Tears to Oklahoma . This was during the removal period in 1830’s. Here in Oklahoma the family was allotted 160 acres of land in eastern Oklahoma at a place called Mankiller Flats, but the land was rugged and it was difficult to eke out a life from it. Thus the family was poor and when Wilma’s father inherited the land he found it difficult to give a good life to his family. He managed to make some money from growing strawberries, peanuts, berries and green beans, cutting timber and picking crops when seasonal work was available. Food for the family was from the vegetable garden supplemented by wild game. Thus when the government’s offer to relocate them once more cropped up Charlie Mankiller was tempted by the prospects of a better life. The family did not wish to move, nevertheless they reached San Francisco only to discover that the relocation program promises were not fulfilled and there was no money. Even employment was very often not available. The children did not like California and was homesick. In her autobiography â€Å"Mankiller: A Chief and her People† Mankiller wrote, â€Å"I experienced my own Trail of Tears when I was a young girl. No one pointed a gun at me or at members of my family. No show of force was used. It was not necessary. Nevertheless, The United States government through the Bureau of Indian Affairs, was once again trying to settle the ‘Indian problem’ by removal. I learned through this ordeal about the fear and anguish that occur when you give up your home, your community, and everything you have ever known to move far away to a strange place. I cried for days, not unlike the children who had stumbled down the Trail of Tears so many years before. I wept tears that came from deep within the Cherokee part of me. They were tears from my history, from my tribe’s past. They were Cherokee tears. † In California Wilma completed her high school and enrolled herself for higher studies. She attended Skyline Junior College and then Francisco State College. It was here that she met her future husband Hector Hugo Olaya. They had two daughters, Felicia born in 1964 and Gina born in 1966. While in college Wilma met the Native Americans who reclaimed the Alcatraz Island. for the Native American people. Many Indians made the bold move to move onto Alcatraz and Wilma got influenced by it. She cherished the thought that her mission in life was to serve her people. She longed for independence to work for her community and this involvement with the community was the reason for the conflict which arose in her marriage. In 1974, she and Hector Hugo were divorced. In the 1960’s there were many social and political movements in America. When Alcatraz was forcefully occupied Wilma Mankiller became aware that the Indians also had rights and these rights had to be protected. She became involved in it and wanted to serve her people to the best of her ability. After Alcatraz she got involved in helping the Pitt River tribe in northern California reclaim their ancestral land. For seven years she worked for them and this prepared her to return to Oklahoma. When her father passed away in 1971 due to kidney failure Wilma was shattered. It â€Å"tore through my spirit like a blade of lightening† she says in her autobiography. Though the family returned to Oklahoma for the burial of Charlie Mankiller, Wilma returned to California after the funeral. Wilma too soon became a prey to kidney failure and though initially it could be treated, she had to undergo surgery and in 1990 she underwent a kidney transplant. Her brother Donald donated his kidney for her. In 1976, two years after her divorce she had returned to Oklahama for good. Here she enrolled herself in a graduate course at the University of Arkansas. Wilma’s will to live and serve her people can be seen in her determination to get well, once when she was involved in a terrible accident and it was thought that she would not survive. Second time was when she developed a muscle disease known as myasthenia gravis. Her life was threatened but her strong will of survival made her fit again.

Current Voltage Relation of Different Memristor Models

Current Voltage Relation of Different Memristor Models Abstract: Memristor a two terminal passive non volatile device is considered as the fourth circuit element and can be used in many applications which includes memory, logic and neuromorphic systems. The memristor provides many advantages like scalability, compatibility with CMOS and offers no leakage current. Various models of memristor have been discussed in this paper. The main focus is on the Current-Voltage (IV) relation of different models and its simulation is done in Cadence Virtuoso. Index Terms- memristor, VerilogA, window function, SPICE, threshold. INTRODUCTION In 1971, L. O. Chua introduced the fourth passive circuit element named memristor which is two terminal non volatile device with a property of variable resistance known as memristance [1]. The memristance provides the relation in the time integrals of voltage and current. Originally, current controlled time invariant memristor is expressed as where w is state variable, v(t) is the device voltage, i(t) is the memristor device current, R(w, i) is the memristance and t is the time period. Since HP labs proclaimed the physical working model of memristor [2], it opens the doors to the new type of electronics. Some of the applications includes logic design [3] [4], memory [5], neuromorphic systems [6]. Different models of memristor have been deigned. Formally designed models does not contain threshold [2] [7] [8] (i.e. resistance changes for any current or voltage). The Threshold Adaptive Memristor model (TEAM )[9] and Voltage Threshold Adaptive Memristor model (VTEAM) [10] models exhibits the threshold current and threshold voltage respectively, are the most efficient models and less computational complexity. In this paper current-voltage relation of different models is implemented using VerilogA code. Section II describes the different types of memristor models. Comparison of memristor model is provided in section III. The paper is concluded in section IV. DIFFERENT MEMRISTOR MODELS Linear Ion Drift Model This is the first and basic model of memristor proposed by HP Labs [3]. This model has width which is splitted in two regions as shown in Figure 1. The region with width w is doped with positive oxygen ions (originally TiO2) and has low resistance therefore is more conductive and other side is undoped. Each region is modeled with resistor (in series). Various assumptions are considered i.e. ohmic conductance, uniform field and average ion mobility. RON is the resistance at w(t) = D and ROFF is the resistance at w(t) = 0 The state variable w(t) is bounded within the interval [0,D]. To prevent w from going beyond the physical dimensions of the device, the derivative of w is required to multiply by the window function. The IV relationship curve of linear ion drift model of memristor for sinusoidal input is shown in figure 2. Figure1: HP memristor model [1] Figure 2: IV curve of linear memristor model with 2-window function. (frequency=20MHz,source amplitude=0.003A, Ron=100ohm, Roff=2e5ohm, ÃŽ ¼v=10e-14m^2/Vs, D=10e-9m, P_coeff=2, initial state=0.5, j=1, w_multiplied=1e9, P_window_noise=1e-18) Non Linear Ion Drift Model Although the linear ion drift model of memristor is simple and satisfies the basic memristor equations. But as per the experiments of the fabricated device, it behaves differently i.e. it is highly non linear [11] [12]. The non linearity is desirable for logic circuits, therefore another memristor model have been proposed based on experimental results concluded in [11]. A model is [13] proposed. The relation between current and voltage for this model is Where ÃŽ ±, , are known as fitting parameters and parameter n describes the influence of state variable (w) on the currents. . Here, the state variable w is normalized within the interval [0,1]. The model shows asymmetric switching behavior, in a way that during the ON state, w is near one and the first term of, is the dominant part of the current, which is a tunneling phenomenon. During the OFF state, w is near zero and the second term, has the dominant part of the current, which is similar to an ideal diode equation. The state variable differential equation is written as where a, m are constants, f(w) is the window function and m is an odd integer. And there is a nonlinear dependency on voltage. The IV characteristics of this model is shown in figure 3. Figure3: IV curve of non linear ion drift model with 2-window function (frequency=20MHz,source amplitude=1V, P_coeff=1, initial state=0.5, j=1, Alpha=2, Beta=9, C=0.01, g=4, n=13, q=13,a=4, w_multiplied=1, P_window_noise=1e-18) Figure 4: IV curve of simmons tunnel barrier model. (frequency=20MHz,source amplitude=0.003A, Ron=100ohm, Roff=2e5ohm, D=3e-9m, initial state=0.5, aon=2e-9,aoff =1.2e-9, ion=8.9e-6, ioff=115e-6,con=40e-6, coff=3.5e-6,b=500e-6,Xc=107e-12 w_multiplied=1e9, P_window_noise=1e-18) Simmons Tunnel Barrier Model Another model having more accuracy than previous discussed model was proposed in [14]. The assumptions of this new model includes non-linearity and asymmetric switching behavior because of an exponential dependency of movement of ionized dopants i.e. changes in state variable. Physical model of this type has a resistor in series with electron tunnel barrier. The simmons tunnel barrier width x, is the state variable. So the derivative of x can be represented as oxygen vacancy drift velocity, and is: where b, con, coff, ion, ioff, aon, aoff are known as fitting parameters. Con is always greater than coff and they both effect the magnitude of change of x. The parameters ioff and ion define the current threshold. Another parameter aoff and aon gives the upper and lower bounds of x respectively. Within the range defined, the derivative of state variable x, is significantly smaller than state variable itself. Therefore, there is no need of window function that is the biggest advantage of this model. According to the simmons tunnel model, the relation between voltage and current can be expressed as: Where V is applied voltage and v is internal voltage of the device (it is not necessary that both voltages are equal [15] ). Based on the fitting parameters, the IV characteristics curve of the simmons tunnel barrier model is shown in figure 4. TEAM Model Before 2013, it was claimed that Simmons Tunnel Barrier model is the most accurate memristor model but it too has some limitations of complication, unexplicit relation in voltage and current and is not in general. Therefore a model with accuracy and simpler expressions is the main demand. The TEAM ( Threshold Adaptive Memristor model) is proposed by Shahar Kvatinsky [16]. This is simple and general model, physically similar to predefined model. Some assumptions can be made for analysis and for computational efficiency. Based on assumptions, state variable derivative of this model is expressed as where aon,aoff, kon,and koff are constants (koff is positive and kon is negative). foff(x) and fon (x) are the window functions, depends on state variable x. by assuming the current voltage relation is same as memristance of memristor which changes linearly in x. Therefore, but if Simmons Tunnel Barrier model is assumed then memristance changes exponentially and given as where ÃŽ » is the fitting parameter. The parameter Ron and Roff are resistances at bound and satisfies By tuning different parameters of the model, the VI curve of this model is showm in figure11. According to [9], it is claimed that the accuracy of TEAM model is more enough having mean error of 0.2%. VTEAM Model Many experiments on memristive devices shown the existence of threshold voltage [2] [16] [17] instead of threshold current. Therefore, Shahar Kvatinsky designs the new model i.e. VTEAM model [10] (Voltage Threshold Adaptive Memristor model), contains threshold voltage. Another reason for the existence of this model is that a memristor exhibiting threshold voltage is more desirable than the threshold current in many applications of memory and logic [10]. The advantages of TEAM model (i.e. general, accurate, simple, designer friendly) combines with threshold voltage in spite of threshold current gives the VTEAM model. Similar to the state variable derivative of TEAM model, the state variable derivative of VTEAM model is where koff, kon ÃŽ ±off and ÃŽ ±on are constants. Parameters voff and von are threshold voltages. The window functions fon and foff defines the dependency of state variable derivative on state variable w. for VTEAM model, the current voltage relation is not properly defined but the linear dependency of state variable and resistance can be attained, from where current voltage relation is where woff and won gives bounds of state variable w. The curve for the IV relation of VTEAM memristor model is depicted as in figure 6. Figure 5: IV curve of TEAM model with 4-window type. (frequency=20MHz,source amplitude=0.003A, Ron=100ohm, Roff=2e5ohm, ÃŽ ¼v=10e-14m^2/Vs, D=10e-9m, P_coeff=2, initial state=0.5, j=1.5, aon=2.3e-9, aoff =1.2e-9, ion=-1e-6, ioff=1e-6, kon=-8e-13, koff=8e13, xon=0, xoff=3e-9, aon=3,aoff=3, Xc =107e-12 w_multiplied=1e9, P_window_noise=1e-18) Figure6: IV curve of VTEAM model without window function. (frequency=20MHz,source amplitude=1V, Ron=100ohm, Roff=2e5ohm, ÃŽ ¼v=10e-14m^2/Vs, D=10e-9m, P_coeff=2, initial state=0.5, j=1.5, aon=2e-9, aoff =1.2e-9, von=-0.2 voff=0.02, kon=-8e-13, koff=8e13, xon=0, xoff=3e-9, aon=3,aoff=3, Xc =107e-12 w_multiplied=1e9, P_window_noise=1e-18) COMPARISON Comparison of different models of memristor is listed in table1. Table 1: Comparison between diffent memristor models. CONCLUSION In this paper, different models of memristor- linear ion drift model, non linear ion drift model, simmons tunnel barrier model, TEAM model and VTEAM model are described. Moreover the VI characteristics of each model is simulated. The VI curve for VTEAM model is most efficient and desirable. Also VTEAM and TEAM models are simple, general and accurate. The VI characteristics of each model is implemented by using verilogA code [18] because of its effiency regarding computational time than SPICE model. REFERENCES L. O. Chua, â€Å"Memristor – The Missing Circuit Element,† IEEE Transactions on Circuit Theory, Vol. 18, No. 5, pp. 507-519, 1971. D. B. Strukov, G. S. Snider, D. R. Stewart, and R. S. Williams, The Missing Memristor Found,† Nature, Vol. 453, No. 7191, pp. 80-83, 2008. G. Snider, â€Å"Computing with hysteretic resistor crossbars†, Applied Physics A, Material Science Process, vol. 80, page 1165-1172, 2005. S. Kvatinsky, E. G. Friedman, A. Kolodny, and U. C. Wieser, â€Å"Memristor-based IMPLY logic design procedure†, Proceedings IEEE International Conference Computational Design, page 142-147, 2011. G. M. Huang, Y. Ho, and P. Li, â€Å"Nonvolatile memristor memory: Device characteristics and design implication†, Proceedings IEEE International Conference Computer Aided Design, page 485-490, 2009. A. Ayatollahi, A. Afifi, and F. Raissi, â€Å"Implementation of biologically plausible spiking neural network models on memristor crossbar-based CMOS/Nano circuits,† Proceedings Eur. Conference Circuit Theory Design, page 563-566, 2009. E. Lehtonen and M. Laiho, CNN Using Memristors for Neighborhood Connections, Proceedings of the International Workshop on Cellular Nanoscale Networks and their Applications, pp. 1-4, February 2010. M. D. Pickett et al., Switching Dynamics in Titanium Dioxide Memristive Devices, Journal of Applied Physics, Vol. 106, No. 7, pp. 1-6, October 2009. S. Kvatinsky, A. Kolodny, U. C. Wieser, and E. G. Friedman, â€Å"TEAM: ThrEshold Adaptive Memristor Model†, IEEE Transactions on circuits and Systems 1: Regular Papers, page 211-221, 2013. S. Kvatinsky, M. Ramadan, E. G. Friedman, and A. Kolodny, â€Å"VTEAM – A General Model for Voltage Controlled Memristors†, IEEE Transactions on Circuits and Systems, page- 1-5, 2014. J. J. Yang, M. D. Pickett, X. Li, D. R. Stewart, and R. S. Williams, â€Å"Memristive switching mechanism for metal/oxide/metal nanodevice†, Nature Nanotechnology, page 429-433, 2008. R. S. Williams, and D. B. Strukov, â€Å"Exponential ionic drift: Fast switching and low volatility of thin- film memristor†, Applied Physics A. Material Sci. Process., page 515-519, 2009. M. Laiho, and E. Lehtonen, â€Å"CNN using memristors for neighborhood connections†, Proceedings International Workshop Cell. Nanoscale Network Their Applications, page 1-4, 2010. D. B. Strukov, J. J. Yang, M. D. Pickett, and J. L. Borghetti, â€Å"Switching dynamics in titanium dioxide memristive devices†, Journal Applied Physics, page 1-6, 2009. J. G. Simmons, â€Å" Generalized formula for the electric tunnel effect between similar electrodes separated by thin insulating film†, Journal Applied Physics, page 1793-1803, 1963. A. Chanthbouala, et al., A Ferroelectric Memristor., Nature materials, page 860-864, 2010. D. Liu, et al., Analog Memristors Based on Thickening/Thinning of Ag Nanofilaments in Amorphous Manganite Thin Films, ACS Applied Materials Interfaces, page 11258-11264, 2013.

Essay --

Volleyball is a very popular sport. It is played throughout the world on state, national, and international levels. The weight pressed on certain parts of a female athlete’s body can negatively affect her bone structure. The upper and lower appendages and the neck structure of female athletes have been known to experience detrimental effects when subjected to the loading modalities, and the different stages of menopause affect the bone mineral densities in specific parts of the bone structure in female athletes. Various sports have been shown to help develop higher bone masses at loaded bone sites. For example, high-impact and odd-impact loadings produce the strongest bone structure in the lower extremities, such as the legs; and high-magnitude loading produces the strongest bone structure in the upper extremities, such as the arms and torso. The lower extremities have the weight-bearing component, which is needed for the dynamic loading required, and muscle performance is primarily focused in the lower extremities. The upper extremities contain the nonweight-bearing component, but unlike the weight-bearing bones, no bone loss has been found (Nikander et al. 2006). A study was performed in order to better understand how different sports and their loadings on the bone structure affect muscle performance and joint moment, depending on the structures of the upper and lower extremities. The purpose of the study was to see if dense bone masses help construct stronger bone structures in athletes and if the nonweight-bearing upper extremity affects bone structure. The subjects that were tested consisted of one hundred and thirteen female athletes. These athletes were representative of volleyball, hurdling, tennis, badminton, squa... ... of the three menopausal stages experienced some bone loss, but the athletes were shown to have higher bone masses. The femoral neck was strengthened due to the different impact loadings on the area. The athletic training and history of volleyball players were a benefit to the bone mass and structure because there was not much loss or detrimental effects of these areas. The preconditioning of the athletes aided in how the bone structure would be affected by the different loading modalities. Like that of the bone structure of the nonathletic referents that were observed in the studies, bone structures at first could be severely affected by the high-impact and odd-impact loadings of volleyball. But, as athletes become used to the various loadings on different parts of their bodies, positive correlations between the loadings and the bone structure and mass occur.