Compensation techniques for 50 Gbps Duobinary System

Compensation techniques for 50 Gbps Duobinary System Pre, Post and Mix Compensation techniques for 50 Gbps Duobinary System Rupinder Kaur, Sanjeev Dewra Abstract: In this paper, the performance of duobinary system is analyzed by using different dispersion compensation techniques. The dispersion compensation techniques tested are Pre Compensation, Post Compensation and Mix Compensation. These techniques are applied to duobinary system, which operates at a bit rate of 50 Gbps. It is found that for 50 Gbps system, Mix Compensation technique shows better performance matrices like quality factor (i.e. 7.54 at 25 km)and bit error rate (i.e. 7.52e-15 at 25 km) as compared to other techniques. Keywords: Mach-Zender Intensity Modulator (MZIM), Single Mode Fiber (SMF), Q-factor, Bit Error Rate (BER), Low Pass Filter (LPF) Introduction For higher data rates, research in optical communications is being constantly driven by requirements. At a minimum bandwidth cost, Fiber Optics has reorganized the data communication technology by examining the limits of high speed network accessibility for the end users [1]. In high speed optical communication system duobinary modulation is a valuable solution that provides the better spectral efficiency and minimizes the performance degradation due to the nonlinear effects and dispersion [2–4]. Due to the promptly growing capacity requirements for long distance transmission, fiber optic communications are advancing into higher bit rate enabled [5]. To increase the capacity of system and to reduce the performance degradation caused by transmission impairments, systematic investigation is essential [6]. Duobinary formats are known for their high tolerance to residual chromatic dispersion and low spectral occupancy [7]. These features make them very attractive for both high spe ctral efficiency and high data rate. For high speed systems, Duobinary signaling has become an essential transmission format as the broadband networks and the bandwidth requirement has increased. By selecting suitable pulse shaping, the selection of optical modulation format has become an essential standard in any high speed link design. This optical signal pre-distortion based pulse shaping increases the dispersion tolerance related performances considerably [8, 9]. In long distance transmission systems, Fiber chromatic dispersion is one of the most severe limiting factor. If the fiber transmission length exceeds several tens of kilometers, dispersion effect can cause intolerable amounts of distortions that ultimately lead to errors. Therefore it is necessary to use dispersion compensation devices such as dispersion compensating fiber (DCF) [10, 11] to overcome dispersion effect and consequently decrease the nonlinear distortion. In this study, we propose three DCF compensation scheme, pre-compensation and post-compensation scheme. Simulation studies show that mix compensation scheme is the best. It can greatly reduce the influences of the fiber nonlinearity and increase the transmission distance greatly System Setup Duobinary Transmitter is designed with laser diodes, filters, modulators and all components which are essential to build an optical network. This simulation is carried out to observe the comparative study with various compensation techniques in the presence of chromatic dispersion. Duobinary signal is launched over DCF SMF spans of 5 km and 25 km each for post, pre and symmetric compensation schemes. Duobinary modulation is achieved by driving an external Mach-Zehnder intensity modulator. MZIM has three inputs, one for laser diode and other for data from the channels. It converts the electrical signal into optical signal. On the receiver side the output of the Lorentzian optical filter a photodiode converts the optical signal into an electrical signal an electrical low pass Bessel filter follows the PIN photodiode. This has a cut-off frequency 193.41449 THz. Finally at the output of the low pass filter visualization tool called Scope, BER estimation Q meter. It is an optical or elect rical oscilloscope with numerous data processing options, eye display and BER estimation features. The system setup of 50 Gbps duobinary transmission with pre, post and symmetric compensation techniques is as shown in figure below. Fig. 1 Duobinary system with Post Compensation technique Fig. 2 Duobinary system with Pre Compensation technique Fig. 3 Duobinary system with Mix Compensation technique Pre-compensation scheme achieve dispersion compensation by place the DCF before a certain conventional single-mode fiber, or after the optical transmitter. Post -compensation scheme achieve dispersion compensation by place the DCF after a certain conventional single-mode fiber, or before the optical transmitter. Mix compensation scheme is consist of post-compensation and pre-compensation Result and Discussion To evaluate the performance of 50 Gbps duobinary system several measurements for Pre, Post and Symmetric compensation techniques were taken. The quality factor versus transmission distance is as shown in Fig.4. The graph shows that the performance of pre, post and mix compensation is compared by varying the distance from 5 to 30 km. Fig.4 Quality Factor vs Transmission distance Fig.4 depicts quality factor versus transmission distance graph. It is observed that by increasing the transmission distance from 5 to 30 km, Quality factor is decreasing. The variation in Q factor is 22.26 to 5.67 for mix compensation, 19.47 to 4.84 for post compensation and 14.04 to 4.69 for pre compensation. It is observed that maximum quality factor is shown from mix compensation technique i.e. 7.54 (at 25 km transmission distance) as compared to post and pre compensation techniques which is 6.33 and 6.12 respectively. Fig.5 Bit error rate vs Transmission distance Fig. 5 shows the transmission distance vs bit error rate graph. The variation in BER from different compensation techniques is 4.05e-72 to 8.20e-8 for mix compensation, 4.61e-58 to 6.57e-7 for post compensation and 4.50e-45 to 4.48e-5 for pre compensation. This simulation result shows that at 25 km transmission distance, the minimum bit error rate value is obtained by mix compensation technique which is 7.52e-15 whereas the bit error rate value for post and pre compensation technique is 3.04e-13 and 1.75e-10 respectively. Fig. 6 Quality Factor vs Input Power Fig. 6 display the influence of signal input power on the performance of duobinary system. From the graph, we can find that as the signal input power increases, quality factor increases upto certain limit, after which it starts falling. This can be understood from the fact that for low powers, the performance of system improves with the increase in input power. However, at higher powers, the wavelengths tend to overlap each other causing more dominance of non-linear effects and thus reduce the quality factor. From the graph it also concluded that the quality factor of mix compensation is greater than the other two kind of compensation techniques. Conclusion In this paper, we investigate the behavior of Pre, Post and Mix compensation techniques on the basis of quality factor and bit error rate at 50 Gbps system and conclude which compensation technique perform better. From the comparative performance analysis for different compensation techniques, it is found that mix compensation is better than pre and post compensation techniques for long haul communication system. It may also be concluded that for lower laser input power, quality factor is better for all compensation techniques. References X. Zheng, F. Liu, and P. Jeppesen, â€Å"Receiver optimization for 40-Gb/s optical duobinary signal,† IEEE Photon. Technol. Lett., vol.13, pp.744–746, July 2001. Yogesh Chabra, R.S.Kaler,†comparison of various compensation techniques at high bit rates using CSRZ formats,† Optik (Stuttg),121(9), 813–817, 2010. Dewra, Sanjeev, and R. S. Kaler. Performance evaluation of an optical network based on optical cross add drop multiplexer†,Journal of Optical Technology, 2013, pp. 502-505. Barnoski, Michael, ed. â€Å"Fundamentals of optical fiber communications†, Elsevier, pp. 109-133, 2012. S. L. Jansen, G.-D. Khoe, H. de Waardt, S. Spalter, C. J. Weiske, A. Schopflin, S. J. Field, H. E. Escobar, and M. H. Sher, â€Å"Mixed data rate and format transmission (40 Gb/s NRZ, 40 Gb/s duobinary, 10 Gb/s NRZ) using mid-link spectral inversion,† Opt. Lett., vol. 29, no. 20, pp. 2348–2350, Oct. 2004. W. Kaiser, M. Wichers, T. Wuth, W. Rosenkranz, C. Scheerer, C. Glingener, A. Farbert, J.-P. Elbers, G. Fischer, â€Å"SPM-Limit of duobinary transmission†, pp. 22-28, Sept. 2000. Debabrata Sikdar, Vinita Tiwari, Yajnaseni Saha, V.K. Chaubey, â€Å"Investigation of modulator chirp and extinction ratio in different RZ- and NRZ duobinary transmitter modules for performance optimization†, vol. 124, no.13, July 2013, pp. 1411–1414. K. Yang, S. Ou, K. Guild, H.-H. Chen, â€Å"Convergence of Ethernet PON and IEEE 802.16 broadband access networks and Its QoS-aware dynamic bandwidth allocation` Scheme†, IEEE J. Select Areas Commun. 27, 2009, pp. 101–116. H. Kim and C. X. Yu, â€Å"Optical duobinary transmission system featuring improved receiver sensitivity and reduced optical bandwidth,† IEEE Photon. Technol. Lett., vol. 14, pp. 1205–1207, Aug. 2002. Debabrata Sikdar, Vinita Tiwari, V.K. Chaubey, â€Å"Optimized transmitter module for NRZ-duobinary in long-haul optical transmission link†, vol. 124, no. 17, September 2013, pp. 2597–2601. P. Pecci, S. Lanne, Y. Frignac, J. C. Antona, G. Charlet, and S. Bigo, â€Å"Tolerance to Dispersion compensation parameters of six modulation formats in systems operating at 43 Gb/s,† in Proc. Eur. Conf. Optical Communication, Rimini, Italy, 2003, pp. 528–529.

A Study On Elizabethan Love Sonnets

A Study On Elizabethan Love Sonnets Our anthology of Renaissance poetry focuses on the Elizabethan period and in particular the sonnet as a genre. Furthermore, we have focused on the theme of love as a dominant trend through the sonnets of this time as it will provide a familiar yet central introduction to the Renaissance period for first year college students. Under the parameters of the theme of the love sonnet we have chosen to concentrate on love as a tool for courtship, the poets attempt to immortalise his beloved through verse, love conquering depression and the link between love, sex and sexuality which is obvious in the Renaissance period. Using sonnets from Shakespeare, Sidney, Donne and Spenser, we aim to provide a clear rationale as to why the love sonnet really was representative of the Elizabethan era and of the English Literary Renaissance on a broader scale. Along with the advancement of Renaissance Italian poetry came the introduction of the love sonnet, a genre which developed through the English Literary Renaissance from Sidneys time and reached its peak with Shakespeare. â€Å"There are periods in the history of any literature when what poets need most is a formal convention which will enable them to study the demands of the medium quite objectively, with a craftsmans eye, and prevent them from merely splashing about in a language that has not been tempered to meet the precise curve of the meaning. The sonnet form met this need for English poets in the sixteenth century†. (Daiches, 1960, 150) Although the English Literary Renaissance developed further after the Elizabethan period, we feel that the sonnet is representative of Renaissance. The sonnet as a genre represents the development in the cultural in Elizabethan time spanning from ranging from Sidney to Shakespeare. Sir Philip Sidney first introduces the sonnet to Elizabethan England, demonstrating a strict adherence to the Petrarchan sonnet, both in form and content. This can be seen in the use of unrequited love in Sidneys collection of sonnets Astrophil and Stella continuing to the later stages of the Elizabethan era with Shakespeare and his interpretation of the sonnet, the Shakespearean sonnet. The difference mainly revolves around the poets ideas of love and how it should be defined. In Shakespeares Sonnet 130, the poet represents the shift from traditional views of the definition of idyllic love, where beauty is defined by a womans perfect outward beauty. â€Å"My mistress eyes are nothing like the sun; Coral is far more red than her lips red; If snow be white, why her breasts are dun† which is in direct conflict with the unrequited love or chivalri c love presented in the earlier Sidney sonnets. In this way it can be argued that Shakespeare represents the development of the sonnet over the span of the Elizabethan period and as such gives a great introductory insight into how love was treated in the Renaissance as a whole. Similarly, although Spensers Sonnet 54 does not flatter the object of his affection in the usual Renaissance manner, it is clear his love is for the woman is strong. A typical use of Elizabethan love sonnets is as a courting mechanism for the poet; a tool for which he can woo his beloved. While Sonnet 54 is unflattering on a surface level, Spenser connects with the object of his affection on a deeper level, a method which may have made a stronger impression on her. Another aspect of Elizabethan love sonnets is the poets attempt to immortalise his beloveds beauty and the love he had for the subject through verse. Edmund Spensers Sonnet 75 and Sonnet 79 are perfect examples of this. Sonnet 75 has a reflective, pensive tone as while it celebrates the beauty of his lover, it laments the transience of the human condition, something which is characteristic of Renaissance poetry. Similarly, Sonnet 79 is a celebration of the poets beloved, but unlike Sonnet 75, Spenser wants to immortalise her inner beauty. We felt that this was important as it is not representative of Elizabethan poetry, yet shows that the poets have the capacity to delve deeper than the celebration of physical beauty. Often we are presented with an image of the Elizabethan poet in a transitory state of depression which he knows will dissipate in time because his wife ultimately makes him the happiest in this world. Sonnet 34 by Spenser likens the poet to a ship lost at sea during a storm at the worst of times. â€Å"The Amoretti describes the growth of the poets love, moving from lust, the desire for possession of the beloved, to charity, the experience of the Not-self. The character of the lady in the sequence is static because her virtue is perfect from the beginning.† (Benson, 1972, 185) Shakespeares Sonnet 14 â€Å"In a period where gender identity is so crucial, where being a man (or woman) has such profound meanings, and where these roles were heavily discussed, it seems improbable that there was not a sense of sexual consciousness.† (Hattaway, 2000, 685) This improbability is confirmed by the love sonnets of William Shakespeare. Shakespeare sonnets can be split up into three different sections. Sonnets 1 126 are thought to have been addressed to a young male, whom in Shakespeares eyes has outstanding physical and intellectual attributes. Although requited love was a theme of Elizabethan love poetry, many poems have been dedicated to unrequited love. Sonnet 30 from Spensers Amoretti describes the struggle of a poet who courts a woman who is not in love with him. Using the familiar metaphor of fire and ice and how they are incompatible, he describes his heated fire-like affection and longing for the woman but cannot understand her cold, detached and ice-like distance from him. Spensers incredulousness at the way in which his courtship did not melt her cold heart is significant as it gives a modern audience an insight into Elizabethan love as a whole; women had more influence over who could court them than is perceived in modern culture. â€Å"Obviously enough, if we read the lady of the Amoretti as a type of Beatrice, all of the sonnets which emphasize her apparent cruelty are in fact fitting expressions of the appro-priate and necessary reaction of perfection to imperfection.† (Benson, 1972, 186) In this same w ay, Sidneys Sonnet 31 from Astrophil and Stella portrays exasperation with its subject for her lack of romantic interest. Had Stella paid attention to Astrophil by reading his sonnets dedicated to her, she would have realised the depth of his love for her and in due course returned it. Furthermore, this poem gives us a wonderful example of chivalric love and courtship that is typical of the Elizabethan age. â€Å"Physical union alone did not lead to this new form just as lust did not lead to virtuous love. Only from the latter-a love which was constant and true came the union of souls towards which the love of rational creatures was supposed to strive.† (Cirillo, 1969, 84) Bibliography Cirillo, A. C., The Fair Hermaphrodite: Love-Union in the Poetry of Donne and Spenser, 1969

Shooting an Elephant Essay -- Analysis, George Orwell

In his essay, Shooting an Elephant, George Orwell illustrates his experiences as a British police officer, and reflects it to the nature of imperialism. He hates his job as a police officer in Moulmein because an â€Å"anti-European feeling was very bitter† due to British Empire’s dictatorship in Burma. Therefore, Orwell, a white man is being treated disrespectfully by the Burmese which allows him to hate his job and British Empire, the root of everything. However, the incident of shooting of an elephant gives him a â€Å"better glimpse †¦ of the real nature of imperialism – the real motives for which despotic government act† (13). In order to express the effects of imperialism, Orwell illustrates this â€Å"enlightening† incidence by using various dictions, rhetorical devices, sentence structures, and generating appropriate tone and mood (13). From his experiences and feelings of living under imperialism, Orwell efficiently shows the terrible effects of imperialism. With the usage of suitable dictions in his essay, Orwell excellently conveys the message and feelings that he is trying to get across. He often uses the word â€Å"natives† for the Burmese: â€Å"Here was I, the white man with his gun, standing in front of the unarmed native crowd† (15). By doing so, he shows his emotions and respect to the Burmese because by calling them â€Å"natives† signifies that they are the true owner of Burma and not the British Empire. Also, by using this diction frequently in the essay, Orwell reminds his readers the existence of imperialism in Burma so that the readers do not just hang on to the elephant but also get the message incorporated in the essay. The body of an elephant is compared with the machine as Orwell thinks, â€Å"it is comparable to destroying a huge and ... ...evastation in society. Thus, George Orwell successfully sends the message of imperialism to his audience by using various styles in his essay, Shooting an Elephant. According to the topic of his essay, his main audiences are the youth, adults, and politicians as imperialism is more concern with them. According to his as a police officer, he teaches his reader that imperialism is the worst way to govern a country as it is harmful to individual’s way of thinking and value of morality in society. Orwell achieves this outstandingly by working out with rhetorical devices, dictions, and sentence structure to generate the feeling in the audience the way he wishes to be. Also, to hold and his readers through his essay, he bring up appropriate tone and mood. In result, Orwell excellently uses the incident of killing an elephant to describe the effects of imperialism.

Aquarius :: essays research papers

Aquarius Aquarius can be found in the SE sky in autumn, especially October. A dark night is especially helpful because many faint stars make up Aquarius. This will help to make the fainter stars stand out because its hard enough to see a shape in Aquarius. Up and to the west of aquarius, pegasus can be found. Down and to the east of aquarius, capricorn can be found. Aquarius portrays a man or boy spilling water from an urn. Aquarius is identified with Ganymede, a beautiful young shepherd who was abducted by Zeus and taken to Mount Olympus to be the cup bearer for the gods. Stars: Sadalmelik: Arabic for "lucky one of the king". It lies just off the celestial equator. Sudalsud: It means "luckiest of the lucky" in Arabic. It is the brightest star in the constellation Sadachbia: Arabic for "lucky star of hidden things" or " lucky star of the tents." This makes up part of the asterism sometimes called the tent, but is usually called the urn referring to Aquarius. Skat or Scheat: It comes from the Arabic word for shin and it dates back to the translation of Ptolemy's Almagest. Albali: The name comes from the Arabic, which means "swallower"; no one really knows why the star got this name Situla: This name comes from Latin and means "well bucket". Situla was the original Arabic name for the entire constellation Aquarius. There are three star clusters contained in Aquarius. M2, which was discovered in 1764, is one that can be seen with a small telescope. A larger telescope is needed to make out the individual stars. M72 is another cluster that is located southeast of Albali and isn't far from the Saturn Nebula. NGC 7492 is the third cluster and is located east of Skat. Aquarius also has two nebulae in it. It is called the Saturn Nebula because it resembles the rings on Saturn. A very large telescope is needed to see its rings. It was discovered in 1782 by William Herschel. In a small telescopes it will appear as faint disks of fuzzy light.

The Balzac and the Little Chinese Seamstress Essays -- Dai Sijie

Balzac and the Little Chinese Seamstress is a marvelous novel, written by Dai Sijie, which himself was re-educated between 1971 and 1974 during the Chinese Cultural Revolution. In Dai Sijie’s Balzac and the Little Seamstress three separate accounts are given of an incident in which Luo and the Little Seamstress make love in an isolated mountain pool. Two of these perspectives are given by the participants while the third is provided by the old miller who observes their love making from a distance. Of all the accounts, I found the count of this incident of Little Seamstress most appealing as she is able to present at an imaginative description of this setting and allow the readers to understand her thoughts and feelings. In contrast the account of the Old Miller is more detached and is more focused about the physical beauty of the Little Seamstress, while Luo’s story to me is more focused on his own concerns and is desire to escape the remote mountain village which he ha s been sent. The Old Miller’s perspective conveys the sense that he is both transfixed by what he sees, but he feel shamed for being unable to take his eyes off the lovers. Their acrobatic movements in the water make him feel his age in the fact that he realizes he can never again enjoy such pleasures. What he focuses on is their nudity and their coupling. This is captured in the image of â€Å"their bodies entwined, whirling round and round in the water.† Feeling â€Å"rooted to the spot† he notices â€Å"the limpid water glittering in the sun exaggerated and distorted their obscene movements.† The miller’s account makes the reader feel like a voyeur and imagine the old man with his face â€Å"reddened.† He is overcome by the beauty of the Little Seamstress â€Å"her naked belly and un... ...h an injury on the Little Seamstress’s finger. A turning point comes up when they get back to the village and finds out that his mother’s been rushed to the hospital, which than he has to visit her for a month. Out of the three stories told by Luo, the Old Miller and the Chinese Seamstress, I find the Little Chinese Seamstress’s story more appealing than others. From my view, it shows a variety of meanings because overall, the Little Seamstress was not educated, but from this story I could tell that she gained knowledge and was able to use what she was capable of doing and you would not expect to gain feedback from a woman who just had relationship with a man. Luo’s story is also very appealing but it shows only concerns for himself and is own feelings. Whereas the Chinese Seamstress was more appealing and showed improvement of her ability to think independently.

City Life is Better Than Village Life Essay

In Certain cases, never cross your mind that City life is better than village life. However, there are so many advantages and disadvantages in city life and village life, also there is a big differ in the lifestyle with a little similarities. Reality, city life is more comfortable and civilization. As will as there are a lot of chances to developing the live. firstly, in City life there is a good opportunity for a young people make theme start them life with a high salary because the big companies located in the cities, in addition, a good education for children because there are better school than in the village, also, a convenient homes, large shop complexions, banks, offices, hotels, and hospitals. see more:country living vs city living Furthermore, a lot of things that cannot may in the village. On the contrary, there are people who prefer to live in the village because they love the village life with its healthy clean air and fresh products and they cannot live in cities, but almost they are usually the elderly. Although living in the city has many advantages there are some disadvantages too, the cost of the living is very high in the city, the city is always noisy, no fresh air and pure water. So it is hard to lead a healthy life. On other hand the village the undeveloped area for example, we cannot easily get many facilities the insufficient medical and education facilities, few opportunities to make money, little entertainment, no or little public transportation, also less facilities than a big city offers. Over all there are some similarities between both locations with big differences. But for each lives there is lovers who cannot switches lives to the other city, at the end, I see that Living in a village near the city is the best way to combine the benefits of this two lives. [continues] Read full essay Cite This Essay APA (2011, 06). City Life and Village Life. StudyMode.com. Retrieved 06, 2011, from http://www.studymode.com/essays/City-Life-And-Village-Life-717448.html MLA CHICAGO Welcome StudyMode.com is the web’s  leading learning tool. We inspire millions of students  every day with over 1,200,000  model essays and papers, AP notes  and book notes. Learn More  Related essays  Village Life Vs City Life  Ã¢â‚¬ ¦part of people that there is a big difference between village life and city†¦ 2 pagesMay 2011  City Life Vs. Village Life  Ã¢â‚¬ ¦might long to live in the city and those in the city may long for the peace†¦ 2 pagesAugust 2011  City Life And Village Life  Ã¢â‚¬ ¦there are so many advantages and disadvantages in city life and village†¦ 2 pagesSeptember 2011  Assignment About Campier And Contrasts Between Village Life And City Life. †¦offer these professions to the people. There are many reasons why a city life†¦

The Future of Nursing

The Affordable Care Act of 2010 (ACA) will have a great effect on nursing. According to this article nursing will have to change it role in the ACA and the three main categories that need to be changed and redeveloped is transforming practice, education and leadership. â€Å"The ACA outlines some new health care arrangements, and with these structures will come new opportunities for new roles. Nurses have the opportunity to play a central role in transforming the health care system to create a more accessible, high-quality, and value-driven environment for patients.If the system is to capitalize on this opportunity, however, the constraints of outdated policies, regulations, and cultural barriers, including those related to scope of practice, will have to be lifted, most notably for advanced practice registered nurses. † (IOM, 2010, p. 85) â€Å"The ACA will place many demands on health professionals. The legislation has begun the long process of shifting the focus of the U. S. health care system away from acute and specialty care. † (IOM, 2010, p.86) â€Å"When the system takes on another additional 32 million people soon to be covered by health insurance under the ACA would receive care in the coming years, it identified as a serious barrier. † (, 2010, p. 96) â€Å"If the United States is to achieve the necessary transformation of its health care system, the evidence points to the importance of relying on nurses in enhanced roles. † (IOM, 2010, pg. 87) This article however complain about number of educational grants and scholarships available and most individuals seek nursing education must finance it themselves.Yes because all college nursing programs are filled every year and cannot support more nursing programs these are filled by the private sector which requires student loans. However there is an abundance of money offered by United States’ government does provide more federal student loans than ever before.â€Å"Stud ent loan debt as of first quarter of 2012 was up to $904 billion which is up $241 Billion form a decade ago and it is said to reach well over trillion dollars by the end of the year. † (American Progress, 2012) â€Å"There is not enough nursing faculty to teach the current  number of nursing students, let alone the number of qualified applicants who wish to pursue nursing. † (Allan & Aldebron, 2008, p. 214) â€Å"The ACA and the need for APRNs, nurse faculty, and nurse researchers would have increased dramatically under any scenario. † (L R Cronenwett [RWJF Iniative on the Future of Nursing], 2010, table 1). â€Å"Not only must schools of nursing build their capacity to prepare more students. Nursing need to focus on fundamental improvements in the delivery of nursing care to improve patient safety and quality is key. † (IOM, 2010, p.  208)Those involved in the health care system—nurses, physicians, patients, and others—play increasingly interdependent roles. Leaders who merely give directions and expect them to be followed will not succeed in this environment. What is needed is a style of leadership that involves working with others as full partners in a context of mutual respect and collaboration (A Pearson, H Laschinger, K Porritt, Z Jordan, D Tucker and L Long [International Journal of Evidence-Based health Care], 2007, p. 224). Looking to the future, nurse leaders will need the skills and knowledge to understand and anticipate population trends.  (IOM, 2010, p. 234)In conclusion The Affordable Care Act of 2010 will place many demands on health care professionals, and it will offer many opportunities to create a system that is more patient centered. The will be much focus on these three initial roles practice, education and leadership. We still must remember the system is getting 34 more million people and a push for changing our current system from acute care to a preventive system and this will not happen ov ernight. It is 2014 and most of us still do not know what is in this health care law, how it will affect us and what it will cost us?Let alone what it will take to change practice, education and leadership across the whole country. This undertaking may take decades to implement. We could have only wished this law was written by doctors and nursing professional with details about where and how the system would be changing yet it was written by lawyer, lobbyist and our Congress that was more concerned about pushing it through than reading it. Nursing is definitely going to play a huge role in this transformation and yes the practice, education and leadership is going to be part of the key of getting this done.