African American Ethnic Group

African American Ethnic Group African Americans are citizens of United States of America forming an African American ethnic minority group whose ancestral land is Africa. Perhaps one of the poignant questions to ask is on how these African descendants arrived in America. From the age period of 1620 to around 1865, there was massive slave trade taking place in Africa to the west especially in countries like France, Belgium and England. In the west, these captives intermarried themselves and with white people, hence siring the African American ethnic group.Advertising We will write a custom essay sample on African American Ethnic Group specifically for you for only $16.05 $11/page Learn More As captives, the group faced serious challenges composing of racial discrimination, prejudice and segregation. The white Americans took them as tools and elements of hard labor with poor or no pay in return. Moreover, these African Americans had no right to do anything leave alone airing their own view s or making their own decisions. The dual labor market hit them hard as most of them were not educated and even if the white Americans allowed them to go to school, education was expensive for them. In addition to that, the white Americans did not allow black American children to sit in the same class with their white counterparts. Redlining became common in those days (Kolchin, 1994, pp.78-83). The American history denotes that, even if the labor market became decentralized, African American ethnic minority group had little knowledge on the operation of these markets. Low level of knowledge meant derailment of African Americans from acquiring high stake office jobs perceived to belong to white Americans only. The only place for work available for the African American minorities was hard labor jobs like digging and other manual activities (Beijborn, 1996, Para.5-7). The environmental setup of the black people in America did not allow them to question the deeds of the white man and t he inequalities they met. In unison, the African Americans struggled in vain to meet their liberties albeit a myriad of obstacles. In return, the white Americans fought mercilessly to deny them civil right liberties. For example, they had no right to neither vote nor choose a leader of their own. Segregation became dominant right from education to food to clothing and accommodation. In the south of America, segregation laws applied strongly eliminating black Americans from schooling in white schools. The white Americans barred African Americans from achieving federal rights like employment rights as a form of discriminating them (Magar, 2009, Para.2-8). Another issue of concern was affirmative action, which violated the rights of women. Sexual harassment to black women was common, leading to race ethnic clashes. Race ethnic sex generated racism imperfectly. Consequently, racism took precedent so strong to quicken liberation front then civil war escalated.Advertising Looking for essay on ethnicity studies? Let's see if we can help you! Get your first paper with 15% OFF Learn More In fact, for every three white Americans killed, about fifty African Americans died as well. To prove these facts, during the electoral process of 1867, a gang called Ku Klux Klan terrorized, maimed, and massacred black Americas with authority from the elite white Americans. There was prejudice and segregation to any African American who dared to vote or take formal education. However, not all white Americans were happy with the ongoing discriminations, prejudices and racism attacks. A quite high percentage of white Americans supported the move while others rejected it vehemently and hence subjected themselves to attacks. African American prejudice, discrimination and segregation exist even up to today in America. To end these vices, African Americans formed civil rights movements to liberate them and assign them freedom. Through liberation, mass murder and exec ution of civil rights kingpins like martin Luther King and others, the war became almost a success. However, even up to today the prejudices and discriminations including still hold is an American society (Hooker, 1999, Para. 6, 8-9). In conclusion, the civil rights act of 1964 rescued African Americans from incessant segregations in employment bureaus, political, economic arena including involvements in doing business hence, stabilizing their economic standards. The climax of their liberation and perhaps the greatest achievement of black and white supremacy in United States of America is the election of Barack Obama as the as the first black president. Reference List Beijbom, U. (1996.) A Review of Swedish Emigration to America. European Emigration. Web. Hooker, R. (1999). African-Americans in the American Revolution. Web. Kolchin, P. (1994). American Slavery: 1619-1877. New York: Hill and Wang.Advertising We will write a custom essay sample on African American Ethnic Group specifically for you for only $16.05 $11/page Learn More Magar, P. (2009). Racism against African Americans. Buzzle.com. Retrieved from https://historyplex.com/racism-against-african-americans

Emma Watsons Speech on Masculinity

Emma Watson's Speech on Masculinity Emma Watson, British actor and Goodwill Ambassador for UN Women, said many smart, important, sociologically informed things during her speech on gender equality  at the UN on September 20, 2014. Surprisingly,  the most important words of Ms. Watson  did not have to do with women and girls, but rather with men and boys. She said: We don’t often talk about men being imprisoned by gender stereotypes, but I can see that they are, and that when they are free, things will change for women as a natural consequence. If men don’t have to be aggressive in order to be accepted, women won’t feel compelled to be submissive.  If men don’t have to control, women won’t have to be controlled. Ms. Watson tips her hat to a multitude of deeply important  social science research in these three short sentences. This research grows  in breadth by the day, and is seen as increasingly important by the sociological community, and by feminist activists,  in  the fight for gender equality. She doesnt use the word herself, but what Ms. Watson refers to here is masculinitythe collection of behaviors, practices, embodiments, ideas, and values that come to be associated with male bodies. Recently, but historically too, social scientists and writers from a range of disciplines are paying critical attention to the way commonly held beliefs about masculinity, and how best to do it or achieve it, result in serious, widespread, violent social problems. The  list of how masculinity and social problems  are connected is a long, diverse, and horrifying one. It includes that which specifically targets women and girls, like sexualized and gendered violence. Many sociologists, like Patricia Hill Collins, C.J. Pascoe, and Lisa Wade, have studied and proven the connection between the masculine ideals of power and control, and widespread physical and sexual violence against women and girls. Sociologists who study these troubling phenomena point out that these are not crimes of passion, but of power. They are meant to elicit submission and subservience from those targeted, even in what some would consider to be their less serious forms, like street harassment and verbal abuse. (For the record, these too  are very serious problems.) In her book, Dude, Youre a Fag: Masculinity and Sexuality in High School,  an instant classic among sociologists, C.J. Pascoe showed through over a years worth of research how boys are socialized to adopt and perform a dominant, aggressive, controlling, and sexualized version of masculinity. This kind of masculinity, the idealized norm in our society, requires that boys and men control girls and women. Their status in society, and inclusion in the category men depends upon it. Of course there are other social forces at play as well, but the powerful socializing force of this dominant notion of masculinity is a key contributor to the widespread rates of sexual assault and  violence against women and girls- and against gay, lesbian, queer, and trans people too- that plague our society. That violence, though, is not only targeted at women, girls, and folks who do not fit within the rigid frameworks of heterosexuality and gender norms. It plagues the lives of normal  men and boys too, as they fight and kill  in defense of their masculine honor. Studies have found that the everyday violence within inner-city communities results in rates of PTSD among youth that exceed those among  combat veterans. Recently, Victor Rios, Associate Professor of Sociology at University of California-Santa Barbara, who has researched and written extensively about the connection between idealized masculinity and violence, founded a Facebook page dedicated to raising awareness about this issue. (Check out Boys and Guns: Masculinity in a Culture of Mass Shootings, to learn more about sociological research on this issue.) Looking beyond  our immediate communities, sociologists  make the case that this insidious link between masculinity and violence fuels many of the wars that rage across our world, as bombs, bullets, and chemical warfare batter populations into political submission. So too, many sociologists see ideologies of idealized masculinity present in the economic, environmental, and social violence wrought by global capitalism. Of these issues, celebrated sociologist Patricia Hill Collins would argue that these forms of domination are achieved by a form of power based not just on masculinity and the power structure of patriarchy, but how these intersect and overlap with racism, classism, xenophobia, and homophobia. The ideal of masculinity hurts women economically too, by casting us  as the weaker, less valuable counterparts to men, which serves to justify the gender pay gap. It bars us  from access to higher education and jobs, by framing us  as less worthy of the time and consideration of those in positions of power. It denies us  rights to autonomy in our own healthcare decisions, and prohibits us from having parity in political representation. It casts us as sex objects who exist to give pleasure to men, at the expense of our own pleasure and fulfillment. By sexualizing our bodies, it casts  them as tempting, dangerous, in need of control, and as having asked for it when we are harassed and assaulted. While the litany of social problems that harm women and girls is both infuriating and depressing, what is encouraging is that they are discussed with more frequency and openness by the day. Seeing a problem, naming it, and raising awareness about it are crucial first steps on the road to change. This is why Ms. Watsons words about men and boys are so important. A global public figure with an enormous social media platform and vast media coverage, in her speech she illuminated the historically quiet  ways in which idealized masculinity has harmed boys and men. Importantly,  Ms. Watson tuned into the emotional and psychological consequences of this issue: I’ve seen young men suffering from mental illness, unable to ask for help for fear it would make them less of a man. In fact, in the UK, suicide is the biggest killer of men between 20 to 49, eclipsing road accidents, cancer and coronary heart disease. I’ve seen men made fragile and insecure by a distorted sense of what constitutes male success. Men don’t have the benefits of equality, either......Both men and women should feel free to be sensitive. Both men and women should feel free to be strong......I want men to take up this mantle so that their daughters, sisters, and mothers can be free from prejudice, but also so that their sons have permission to be vulnerable and human too, reclaim those parts of themselves they abandoned, and in doing so, be a more true and complete version of themselves. Brava, Ms. Watson. You simply, eloquently, and compelling illustrated why gender inequality is a problem for men and boys too, and why the fight for equality is also theirs. You named the problem, and powerfully argued why it must be addressed.  We thank you for it. Click here to learn more about the UNs HeForShe campaign for gender equality, and pledge your support to the cause.

IBook Neurology Clerkship Thesis Project (Introduction)

IBook Neurology Clerkship Project (Introduction) - Thesis Example There is a lot of sensitivity within the healthcare industry where clinicians deal with matters of life and death and thus students in the medical schools and other related fields should be well equipped with both theoretical and practical knowledge that will be achieved through this project. The project will utilize the iPad through its iBook software to deliver instruction to students. Since all students in the clerkship are provided iPads, the iPads will also insure that students get 24-hour access to comprehensive learning tools and student support services. As a learning tool inside and outside of the classroom, the iBook will blend the theories of problem-based learning in interactive-simulated style to help these medical students practice their critical thinking while fostering intrinsic motivation to learn and collaborate with others. Not only will the iBook aid students with their own learning, but it will also give instructors a way to measure the progress of their students by gathering data about their student’s advancement through iBook simulations and iBook assessment exams. Overall, the project will help all medical students in the Neurology clerkship to better succeed in the program and become better critically thinking medical professionals in the process. Medical students, at the University of California Irvine, must complete numerous clerkships as they complete their medical training. The Neurology Clerkship is one of the last that students must complete. In an effort to increase student success rates, UC Irvine has provided all medical students with iPads. The iPads introduce students with a transformative mode of learning by connecting students with the same advancements in seen in the medical profession in the classroom. Even though iPads provide both students and instructors with the technological tools necessary for success, not all programs

Effective team and performance Essay Example | Topics and Well Written Essays - 1750 words

Effective team and performance - Essay Example Nondi’s payroll system also ensures that workers pay is commensurate to their tasks. Maslow’s theory is applied in this scenario given that the restaurant aims at satisfying the basic needs of its employees before satisfying their secondary wants of self-actualization. According to the Clark, scientific theory of management, theory x, stipulates that the workforce needs to be controlled and supervised in order to dispense their duties as required by the organization. This leadership criterion is achieved through the application of division of labor. This ensures that each worker is given apportion for tasks to perform. This leads to increased productivity and performance. Moreover, these results in the motivation of employees. The division of labor in Nando’s is manifest in the manner in which the workers serve the clientele. Some staffs just welcome clients while others serve the customers. The rest of the employees, monitor the preparation of the flame grilled chicken.

The Construction of Women in Sports within the Mass Media Essay Example for Free

The Construction of Women in Sports within the Mass Media Essay Recent studies involving the role of the mass media and gender, particularly within the realm of women’s sports has brought light upon one of the most disturbing issues in society today: the under-representation and misrepresentation of women in mass media. It can be concluded that female athletes, framed by the media as objects of sexuality, or â€Å"sports cuties,† are consistently emphasized for their sexuality instead of their athleticism. Not only does this diminish their achievements in the sports arena, but it also systematically reinforces the idea that sports are a â€Å"males-only† realm. The mass media, using magazine covers, celebrity programs and news articles, focus more on female athletes as symbolic models for female sexuality than as athletes. Constantly, female athletes are portrayed in coy scenarios involving accentuated legs and breasts, or with pouting lips and scantily clad outfits. This paper will highlight some examples of research into symbolic representation of female athletes as passive, emotionally demonstrative and vulnerable objects of the sports world, whereby athletic merit is given second seat to skin and sex. Furthermore, this paper will base itself on the greater theoretical standpoint of hegemony, citing such theorists as Louis Althusser and Antonio Gramsci. The analysis will also base itself on the work of Laura Mulvey, who presents the idea of the â€Å"Male Gaze,† whereby women are shown as sexual objects for the visual purpose of men’s enjoyment. Through this analysis of women in sports and the medias response to female athletes, it is postulated that women have been systematically moved from active participants as subjects, to a more passive role as objects. This fact reinforces a particular hegemonic, patriarchal power structure, and furthermore, reinforces the power roles of those who are responsible for such representations. To lay the foundation for the analysis, it is helpful to first consider the theoretical basis of Althusser and Gramsci. The theory of ideology and hegemony is particularly relevant for the later exposition on the portrayal of women within the cultural eye of the media. Althusser states that false truths are used to maintain power. The group with the power (in this case one could take such an example as Time Warner, the owner or Sports Illustrated for Women) defines the rules of the game. This means that the group in power creates media frames and representations of reality that further construct a worldview that is conducive for the maintenance of the present day structure. Power is given to subordinate classes (the viewers of mass media) by the ruling power (Time Warner), in a way that makes it appear that they are given concessions (â€Å"We give the audience what they are asking for. †) And yet, as Gramsci outlines, these concessions are still a means of maintaining power. The genius behind such a set up lies in the fact that the ideology is created in such a way that the both the ruling class and all other classes believe that such hierarchy of power is inherent or natural. In the case of sports, the watching public believe that women are naturally meant to be depicted as sexual objects, focusing on married life and vacation preferences, instead of the active subject such as a male athlete, where a more clearly demarcated â€Å"sports focus† is enacted. Herein lies a clear real-world metaphor for the theoretical models of Althusser and Gramsci.

Jazz Report Essay -- essays research papers

I attended the University Symphony Orchestra's "An Evening of Handel, Schubert, and Haydn" on Thursday, September 30, 2003 in the Daniel Recital Hall. The hall was much more crowded than I expected. At the beginning of the concert, the orchestra was seated on the stage; the men wore tuxedos, and the women wore black dresses or pants. The concertmaster came out to tune the orchestra, and then the conductor made his entrance and gave a brief description of the piece that was about to be played. George Frideric Handel's Overture to Music for the Royal Fireworks was composed during the Baroque era. It has a homophonic texture and its genre is a suite. There is a wide variety of instruments (aerophones, chordophones, and membranophones) used in this piece. Among the wind instruments (woodwinds and brass) heard were bassoon, oboe, French horn, and trumpet. The strings played included the violin, viola, cello, and double bass. Finally, the percussion instrument used for this piece was the timpani. This movement is broken down into four sections by tempo: Adagio, Allegro, Lentement, and Allegro. The Adagio section begins with a slow introduction at a mezzoforte dynamic. This section is in a major key and set in quadruple meter. It has a wide range and an ascending melody. There are brief cadences and the section grows in a crescendo. The loudness and energy of this section holds the attention of the listener and creates a proud and joyful mood. The Allegro section begins...

Evolution of Health Care Information Systems Essay

Health care has come a long way in technology for the past, implementing new technology has made the health care industry grow in size. Major events of health care have paved the way for future technologies influence the physicians, administrators, clinicians, and staff to push pass the old ways of thinking and create new initiatives of information systems. Health care information will be moving forward with significant changes, technology involvement will prove to be a positive and much needed impact to the decision making process. Compare and Contrast Health Care Operations within 20 years The evolution of health care information system has been proficient, effective, and patient-focused technologies have an influence on the way health evolve over the years. East Orange General Hospital has a lifetime of learning in keeping up with the new trends of technology.  The changes in the health care information systems from 20 years ago have put value on the system by improving patient safety and confidentiality. â€Å"The broad spectrum of clinic information has made a way for hospitals to integrate with administrative applications of care†. East Orange General Hospital have the use of information technology so the increase of efficiency and patient-centered care to possible with the right measures. Comparing the health IT systems to 20 years in the past has shown the comprehensive strive in implementing and computerizing different aspects of care management. Delivering information in today’s time has shown the function of the new trends of operating and implementing new technology. In 20 years, paper documentation was the normal office rule for information, patient charts came in the paper form. The differences of past information management in health care was ambiguous and undone data, poor availability, and fragmented data of patient charts. In today’s information system, significant advances help maintain a high quality of care. Improving patient care, clinical information expanded to help increase the quality of care. East Orange General Hospital has launched a new electronic medical record system to support efficiency and accuracy in patient accounts. The organization will reduce the use of paper charts, but still uses both paper and electronic record keeping. The implementation of computerized record system at EOGH has now positioned itself to receive incentive payment from Medicaid and Medicare† (Slavin, 2011 Para 1-2). The technology used at EOGH is Centricity, Series, and Precyse systems; these systems control the computerized provider order entry (CPOE), Health Information Exchange (HIE), and Personal Health Record (PHR). Information technology today m ade it possible to improve patient services in many ways. Hospitals will be better equipped with the tools for maintaining patient records and keeping confidentiality of information intact. Paper-based information was the normal way to go 20 years ago, documentation misplaced, duplicates used made patient information unreliable for some parts of record keeping. â€Å"The health Information system has become most challenging with promising results through research, education, and medical informatics in medical records and health care† (Haux, 2004 â€Å"p† 269). Rising technologies in health care need a high-tech approach in the medical community to a terrific life-span in health care organizations and the willingness to use it. Technology is showing how in the future disease management will be a prior and reflection on the progress of better diagnosis with the technology realm of care for health care. â€Å"Various successes of technology have made the concept of prevention, health promotion, and integrative medicine to bond for a product of quality care† (Weil, 2011 â€Å"p†1). Major Events and Technological Advantages that Influenced Current HCIS Practices Technological advantages starts with the implementation of information systems that will help physicians obtain a more rapid response for patient medical records. The change in health care started with the â€Å"potential benefits of the EMR a step further by adding sophisticated hardware to the mix† (Silverman, 1998 â€Å"p† 2). Doctors can use a wall-mounted keyboard with a monitoring system to check results of recent procedures, consultations, operations, or images. Health information recording and clinical data repository is how checking orders of daily medications by touching key pad helps in the integration process of writing progress notes of the clinical findings. Electronic Medical Records has steps in pulling patient charts, â€Å"searching for missing or misfiled data, transcribing orders, filling out multiple lab, diagnostic test, and pharmacy requisitions, or writing progress notes hours after having actually examined the patient are now all completed† (Silverman, 1998 â€Å"p† 2). The clinical data repository needs a good electronic medical records system, so that medical records that been scanned can be reviewed. EMR is a record in digital format which can be capable of experiencing certain health care agendas of care. EMR’s are being embedded in network-connected enterprise-wide information systems† (Dacca, 2013 Para 2). The records included has a certain range of information in summary or comprehensive text, including demographics, immunizations, radiology data, medical history, laboratory test results, medication, and allergies, vital signs, personal status of age, sex, and weight, and billing information. Electronic Medical Record (EMR) is a critical part of quality care for everyone involved in the process of EMRs and America’s standard of care. EMR and other decision support systems can help prevent medical errors that plaques the United States for decades under the fraud and abuse category in health care† (Williams & Austin, 2008 â€Å"p† 40). The second event that has shaped the core of HCIS is how the Health Information Portability and Accountability Act (HIPAA) has helped health care delivery system to excel in providing effective and safe care and highest quality possible. The government created the Health Information Portability and Accountability Act (HIPAA) in the 1950s; this agency is strictly for continual improvement in patient confidentiality within health care facilities. The public are the main concern of the Joint Commission in â€Å"collaboration with stakeholders, joint commission help inspire safe and effective care† (The Joint Commission, 2012 Para 2). The joint Commission governs the assessments of quality and safety of care within health organizations that help set standards that measures quality care with patient confidentiality. Conclusion: Health care technology has reached epic proportion in America, Innovation is important in medical technology; it is the essence health care rganizations. The drive of technology is the innovation for a better quality care in a faster pace. â€Å"Medical technology help improves individual lives and help in the benefits of treatment to individuals whose conditions may have been difficult or impossible to treat† (Wager, Lee & Glaser, 2009 â€Å"p† 5) with new trends of health care. Innovation is improving in products, and improving the way healthcare shows delivery; this is making healt hcare delivery efficient and more sustainable.

Introduction to Ambisonics

The development of Ambisonic surround sound systems started in the 1970’s. They were based on a mathematical model of directional psychoacoustics, which was developed by Michael Gerzon. The model which he developed, described directional psychoacoustics in a mathematical form, so that it could conveniently be used in calculations relating to surround sound system (Mallham 10) Ambisonics can be defined as a method of recording information about a soundfield and reproducing it over some form of loudspeaker array so as to produce the impression of hearing a true three dimensional sound image.Simply put, Ambisionics is a system of recording and playback of sound fields. The model was developed by Gerzon. It used several previous theories of loaclization, and hence was more directional as compared to other systems, resulting in benefits such as reduced listening fatigue, good inter-loudspeaker imaging with reduced susceptibility to the detent effect – the tendency for appare nt source locations to be pulled towards the closest loudspeaker. This later feature improved image stability (Cotterell ch-1 16)Ambisonics is basically a two-part system of recording and playback, which is built upon strong mathematical foundations and theories of human hearing. The term soundfield, mentioned above, is a word used for describing sounds in the environment. It usually implies 3 dimensions. For recording in Ambisonics, an array of microphone capsules are built into one microphone called a Soundfield microphone. This Soundfield mike recording are then processed and encoded into a special format, called B-format, which may be written on and distributed using many different types of media.In the endy, a decoder is used to process and recover the soundfield, This can be played back in many types of listening setup, giving a unique output for every speaker available (Adams 2) As is seen in above, Ambisonics employs a signal set, known as â€Å"B-format†. This is bas ed on the principle of encoding direction, without reference to the loudspeaker layout used for reproduction. This results in Ambisonic systems being adaptable to multiple loudspeaker layouts. Using an Ambisonic decoder, appropriate loudspeaker feed signals can be derived from the transmitted B-format signals.Generally the number of loudspeakers exceeds the number of B-format signals. This is done to obtain good performance from Ambisonic systems, since in the number loudspeakers usually gives better results (Adams 2) It is observed that the Brain can process Soundfield information in several ways. However, much of this processing is seen to rely on the differences between sounds reaching the ears. As an example, if a sound is played to on the right side, because the right ear is closer, it will first receive the sound than the other ear.This is termed as Interaural Time Delay (ITD). Again, in this case the sound would be quieter in the left ear, not only because it is farther away, but because the body and head will absorb some of the sound. This is termed as Interaural Level Difference (ILD). The brain also pays attention to the timing between and relative loudness of sounds coming directly from the source and sounds reflected off of walls and other surfaces. This means that sources that are farther away tend to have more reflected energy than direct energy reaching the ears.These ear-brain interactions are called psychoacoustics (Adams 2). When a Soundfield recording is done, more efforts are made to gather and record as much information about a very small volume of space, as possible. This information comprises of just – measurements of air pressure and air pressure changes. By just adding an omnidirectional microphone to the pair of figure eight units, it is seen that one can capture all this information, with simple low order microphones. The three hree capsules should be acoustically at exactly the same place in the soundfield i.e. , The capsules are arranged to be truly coincident. This becomes even more difficult when theer is an addition of an up-down oriented figure eight capsule in order to record height information.. This problem has been overcome in the Soundfield microphone which uses four small capsules situated on the surface of a notional sphere to sample the incoming sounds (Mallham 12) Building upon recording techniques for stereo developed by Alan Blumlein in the 1930s, Ambisonics extends this recording of information into the third dimension.The idea is to record not only the pressure at a location, but also the pressure changes in different directions – front-back, left-right, and up-down. With proper decoding of this information using mathematics as well as psychoacoustics, a soundfield can be produced by speakers in the room, which reconstructs what was going on in that small volume at the listener's location (Adams 2). In Ambisonics the horizontal figure eight units are mounted front-back and side- to-side rather than at 45 degrees (Adams 2).Basic Ambisonics Technology The Ambisonic surround sound system can be considered as a two part technological solution to the problems of encoding sound directions, and reproducing them over loudspeaker systems in such a way that the listeners ears are under the impression that the sounds they are gearing are from speakers which are correctly located. Technically speaking, this can take place over a 360 degree horizontal only soundstage i. e. pantophonic systems or over the full sphere i. e. periphonic systems (Mallham 14)Ambisonic offers a hierarchy of encoding schemes from a stereo compatible UHJ format (Sinclair 27) There is no need to consider the actual details of the reproduction system when doing the original recording or synthesis Encoding Equations – The position of a sound within a three dimensional soundfield is encoded in the four signals which make up the B format: X = cosA. cosB (front-back) Y = sinA. cosB (left-right) Z = sinB (up-down) W = 0. 707 (pressure signal) Where, A is the anti-clockwise angle from centre front and B is elevation (Mallham 14)B- Format A number of different signal sets may be used at some stage of an Ambisonic system: A-format signals – The output signals of the microphone capsules making up a soundfield microphone. This signal set is not available to the outside world; it is utilised only within the soundfield microphone itself. C-format signal – The signal set which is conveyed to the listener via a recording or transmission medium, when it differs from B-format, is termed C- format. The â€Å"C† is sometimes said to stand for â€Å"consumer†.The C-format signal sets were proposed as part of the initial development of Ambisonics are together known as the UHJ hierarchy (Cotterell Ap-2 16) With Ambisonics, a sound field is decomposed into spherical harmonic components, termed W, X, Y and Z. These are collectively called B-Format (Leese 7). B-fo rmat is based on the principle of encoding direction, without reference to the loudspeaker layout used for reproduction. As a result of this, ambisonic systems are adaptable to multiple loudspeaker layouts; an ambisonic decoder derives appropriate loudspeaker feed signals from the transmitted B-format signals.To obtain good performance from ambisonic systems, the number of loudspeakers should exceed the number of B-format signals used; a further increase in the number of loudspeakers will usually give improved results (Cotterell ch-1 18) B- format signals can also be expressed in terms of derivatives of sound pressure. The nth-order B-format signal set consists of the signals obtained from coincident microphones having polar patterns corresponding to the (n +1) linearly independent spherical harmonics of all orders up to and including n.A signal set of any order can be extended to a higher order merely by augmenting it with additional signals; it is not necessary to change any of th e existing signals. Thus, an nth order soundfield microphone is distinguished by its ability to provide outputs which are the nth-order B-format signal (Cotterell ch-4 1) B-format signal is the primary signal format for Ambisonic use. Ideally, the B-format signals would be communicated directly to the listener.Unfortunately, this has not always been possible – in particular, the need to distribute recordings via two-channel media, retaining compatibility with existing stereo and mono equipment, led to the need for alternative signal formats to be employed (Cotterell Ap-2 16) Enhanced B-Format; BE-, BF- & BEF-Format Enhanced B-format signal sets have been proposed in connection with B-format decoders, which are optimized specifically for use with HDTV, or more generally for use in support of visual media (Cotterell Ap-2 19)The primary motivation is to produce a frontal sound stage which is more stable with respect to movement by the listener, and specifically to lock centre-fr ont acoustic images in place with respect to a screen. Thus, the motivation is substantially the same as for the use of the centre channel in cinema-oriented surround sound formats. Hence, two extra signals are defined, denoted as E and F, which have directional response patterns. (Cotterell Ap-2 16) Ambisonics and Stereo The B format signals are not at all stereo compatible.However, it is possible to combine the three (X,W,Y) components required for horizontal work in such a way that not only is a good stereo compatible two channel system produced but with a suitable decoder much of the original surround sound image can be recovered. This resulting Soundfield is also not perfect, but carefully designing the encoding equations can make it possible to place the defects in areas where the ear is less susceptible (Mallham 10) This encoding method, called UHJ coding, is used to produce stereo compatible Ambisonic records, tapes and broadcasts.The X,Y and W signals are combined in the fo rm of a two-channel compatible stereo signal (Brice 225). This is done using the following equations Left = (0. 0928 + 0. 255j)X + (0. 4699 – 0. 171j)W + (0. 3277)Y Right= (0. 0928 – 0. 255j)X + (0. 4699 + 0. 171j)W – (0. 3277)Y The above decoding equations are such that a decoder for any of the levels will always extract the correct information from high level inputs – in other words the system is upward compatible (Mallham 10) B+ format Another extension of the B-format, mentioned above, was developed by Dr. Thomas Chen.He calls it as â€Å"B+format†. This gives an optional enhancement to the Ambisonics listening experience. Definition B+ format is the standard 4 channels of B format material known as W, X, Y, and Z plus 2 channels of L/R dry stereo recording. This method of recording separates the dry/direct sound from the ambient/room sound in recording and reproduction. Each serves a distinct purpose and is ideally suited to it. (Chen 1) The à ¢â‚¬Å"+† which is seen in B+ Format denotes the presence of a close-miked standard stereo recording simultaneous with a soundfield recording.This is decoded to the front-half of the rig to give the impression that there is a set of stereo speakers on its surface in front of the listener. The angle between them is around 60 degrees (Adams 2) Chen is the inventor of B+ format. This format extends Ambisonic B format with two additional channels. Going by his definition of the format, one can see that, Chen suggested B+ format by combining the 1st order ambisonic B-format with two additional channels L/R dry channel recording (Trond 2) One way to look at this idea is that the format separates the dry signal and ambience.This means that the dry and ambient signal can be dynamically mixed depending on the space used for playback as well as the preferences of the listener (Trond 3) Why use the B+ format Chen considers that the sound system he ahs created, would provide the following feature:. †¢ Ambient – The system would be ambient. This means that the whole acoustic event could be captured and regenerated, such that it manages to give convincing impression to the listener’s ears, which a conventional stereo sound systems doe not. A soundfield must be present on reproduction.†¢ Accurate – The system would be accurate. This means that the direction of the sounds must be exact, as per the specifications or requirements i. e. front-stage, to the sides, above or below, behind. †¢ Sounds would be free from audible distortions of tone, timbre or position. The system must equally suit all types of singers, without any particular voice sounding good or bad. †¢ Scaleable – The system would support the group listening no matter the size of the group, and the same system could be used by an individual without compromising on the sound quality.The scaling factor would be adjustable †¢ Approachable – The system wo uld be easy use without any complications, physical or otherwise, on the behalf of the listener. For e. g. – No head clamps or enforced body positions or forbidden head directions or microscopic sweet spots or compulsory narrow listening seat. †¢ Practical – The system would be easily tailored to suit the ordinary domestic listening environments, at least as good as what conventional a stereo does.†¢ Compatible – The system would be able to satisfactorily replay the recordings of mono and stereo material; while sound recorded using the technology would replay satisfactorily on conventional stereo systems or would be able to readily convert to match them. For example, FM stereo being broadcast as a mono-compatible Sum and Difference rather than directly as a Left and Right signal. (Chen 2) As mentioned above, B+ Format consists of B format ambient-recorded signal plus two channels of L/R direct recorded signal. It is recorded on 6 channels and when repr oduced it is decoded into as many channels as the listeners wishes. (Chen 3)By using the two channels of L/R direct recorded signal , the directional sound clues from the direct signal as well as the sound of the instrument are present only in the front i. e. – instrument setting experience. There is no vertical height information in this pair, which is added to the frontal speaker array (Chen 3) By enabling the ambient and direct information to be stored separately, the listener can choose the balance of direct and ambient information at the time of reproduction. This will allow for many different sized reproduction spaces. The larger space will need less ambient information while the smaller spaces will need more.In addition the listener can choose the amount of preferred ambience (Chen 3) Time, Location and Spatial Representation The direct sound gives the best directional and instrumental timbre information. Hence, the direct sound should arrive earlier than the ambient s ignal. Also, the direct sound doesn't have any spacious or enveloping qualities (Chen 4) The ambient sound best gives spaciousness, spatial depth and envelopment to the reproduction of sound. B format presentation is known to be inaccurate in presenting location and therefore many scientists are trying to improve the reproduction with higher order of B format decoding.Also, first order of B format is considered to be satisfactory for presenting the ambient sound because it is not well localized (Chen 4). Storage Requirements As mentioned in the section above, B+ Format recordings require 6 channels of storage. This can be obtained with either SACD or DVD-A using MLP compression. Chen says that the advantage of using B+ format disks is that one is not limited to the speaker arrangement that the format will dictate but rather a decoder will determine your listening set up or you can set the decoder for your listening set up (Chen 5) Recording Techniques for B+ FormatDirect Recording S tereo Mics – Recording of the direct channel done by conventional means. Can use stereo microphone techniques: X/Y, M/S or OCT. Stored as L/R or M/S. Direct signal should contain little reverberant information. Recorded using direction microphones. Spot Mics – Spot microphones or flanking microphones to balance recorded sound. Need to add ambience to the spot microphones and to flanking microphones. The ambience added should be in B format and added to the B format channel. Multi Track Techniques – Multi-track techniques used to generate the direct signal and to add ambience in B format.B-Format Recording Room Recording – Room ambient recording done with the Soundfield microphone generating a B format output. The location of the Soundfield microphone is typically at the location in the room where the direct and reverberant sounds are equal. B-Format ambience by convolution –This is a digital technique where a room ambience is measured in B format a nd then is impressed upon another signal. B format ambient information can also be obtained with multiple reverberation devices. At least 3 engines are needed to generate B format reverberance, one for each axis (Chen 5)Techniques for Monitoring B+ Format Ideal decoding with 16 channels Decoding of the B+ format is ideally presented as 16 channels. This is arranged as two rings of 8 speakers with 45 degrees of separation between them. From stereo, it is known that the maximum separation between speakers without a hole in the middle is 60 degrees Thus by using an upper and lower ring of eight speakers vertical/height information can be presented. The listener usually presents the L/R stereo on the front speakers without height information.In this case the listener should be able to adjust the balance of dry versus ambient sound. For this Chen has developed decoders for 16, 12, 10 channels of 3D surround or without height as 8, 6, or 5 channels (Chen 6) Decoding in the present control room The listener can use the present control room to work in B+ format. In this case the decoding is done with 60-degree speaker spacing with two rings of 6 speakers. The front up and down speakers will be combined and the present control room speakers will be used for the sum of the front up and down signals.After this listener can use his present console to obtain the L/R stereo mix and use a pair of auxiliary sends to sent to the B format ambience generator (Chen 6) Software for the B+ format Dr Thomas Chen has developed exciting and powerful software for the Creamware Pulsar system, providing multiple, configurable B-format and B+ format decoding, mixing and signal manipulation subsystems. He intends to make this software available commercially, either through Creamware or direct, in the near future.

Recrystalization Lab Report Essay Example

Recrystalization Lab Report Essay Example Recrystalization Lab Report Paper Recrystalization Lab Report Paper An exothermic reaction started immediately with concomitant orientation of a brown precipitate of crude actinide. Ml of water and a magnetic stirring bar were added to stir the reaction mixture and the flask was heated on a magnetic stirring hot plate until all of the solid and oil were dissolved. The temperature of the reaction mixture at this point was close to ICC, the boiling point of water. A few millimeters of hot solution was removed from the flask with a disposable pipette and placed in a test tube. The test tube was set aside to cool and produce crystals. The color and melting point of the in batch of crystals were used to assess the effectiveness of activated carbon treatment of the main batch to remove the colored impurities (vide infra). The temperature of the main batch of the reaction mixture in the Erlenmeyer flask was brought down to 70-ICC, and approximately a pinch of activated carbon were added to the solution. The reaction mixture was carefully brought to boiling with efficient stirring, to prevent bumping over of the reaction mixture. The hot solution was filtered through a double layer of fluted filter paper arranged in a conical glass funnel, previous heated over a boiling water bath. To complete crystallization, the filtrate was cooled in an ice bath. The crystals were collected by suction filtration. The collected product was spread over a filter paper to dry until the next class period. Dried actinide showed melting point, 112-ICC, yield 2. Grams. The crystals from the mini batch that was not treated with charcoal were collected by suction filtration using a Hirsch funnel. These crystals had brown color and showed melting range of 106-ICC, yield 0. Egg. Percent Yield Calculations: Weight of aniline = 2. 0 g Molecular weight of aniline= 93 Molecular weight of actinide = 135 Theoretical Yield Actual Yield = 2. 03 g + 0. 01 g = 2. 04 g % Yield 100 70. 3% Yield Results and Discussion: In this experiment, aniline (liquid) was reacted with acetic anhydride (liquid) in water at room temperature to give an impure, tan colored solid. The solid was crystallized from water with the use of charcoal to give white flakes of actinide, melting point 112-ICC, actual yield 2. 4 grams. When charcoal was not used urine crystallization, the crystals remained an off-white color. The melting point of the mini batch of brown/tan crystals was 106-ICC. The overall reaction between aniline l, and acetic anhydride, II leading to the formation of actinide is shown below in the first equation. The mechanism of the reaction between the two reactants to produce the actinide is show n in the second equation. In equation 2, the curved arrows represent the flow of electrons during bond formation and bond cleavage. Observations: a. Reactants aniline and acetic anhydride were both insoluble in water, the action medium; however, when the reaction was swirled by hand, an exothermic reaction took place within minutes which produced the solid actinide. B. Acetic anhydride is a high energy molecule. C. Both aniline and water can react with acetic anhydride, but aniline reacts with acetic anhydride at a much faster rate to produce actinide. D. Charcoal was very effective in removing colored impurities from the impure batch of actinide. Questions: 1. The major purpose of crystallization is to purify a solid. . Water is nonflammable and nontoxic. . Used to remove small amounts of colored impurities. Activated carbon absorbs the polar compounds. 4. Because if we add more solvent, then we can vaporize it off. 5. Because because many organic compounds are not soluble in water because it is hydrophobic. These compounds are soluble in ethanol because of ethanols functional groups. The chemist can then add more water to the s olution because the organic compound is soluble in the ethanol. 6. We do not use Benzene and water because they do not dissolve with each other. Like dissolves like.

The Bakufu Ruled Japan for Nearly 700 Years

The Bakufu Ruled Japan for Nearly 700 Years The bakufu was  the military government of Japan between 1192 and 1868, headed by the shogun. Prior to 1192,  the bakufu- also known as shogonate- was responsible only for warfare and policing and was firmly subordinate to the imperial court. Over the centuries, however, the bakufus powers expanded, and it became, effectively, the ruler of Japan for nearly 700 years. Kamakura Period Saurai protecting royal carriage durring the Burning of the Sanjo Palace. Corbis / VCG  / Getty Images Beginning with the Kamakura bakufu in 1192, shoguns ruled Japan while emperors  were mere figureheads.The key figure in the period, which lasted until 1333, was  Minamoto Yoritomo, who ruled from 1192 to 1199 from his family seat at Kamakura, about 30 miles south of Tokyo. During this time, Japanese warlords claimed power from the hereditary monarchy and their scholar-courtiers, giving the samurai warriors- and their lords- ultimate control of the country. Society, too, changed radically, and a new  feudal system  emerged. The Ashikaga Shogonate After years of civil strife, precipitated by the invasion of the Mongols in the late 1200s,  Ashikaga Takauji  overthrew the Kamakura bakufu and  established his own shogunate in Kyoto in 1336.  The Ashikaga bakufu-   or shogonate- ruled  Japan until 1573. Ahsikaga Takauji. æâ€" ¥Ã¦Å" ¬Ã¨ ªÅ¾: ä ¸ Ã¦ËœÅ½ / Public domain /   Wikimedia Commons   However, it was not a strong central governing force, and in fact, the Ashikaga bakufu witnessed the rise of powerful daimyo  all around the country. These regional lords reigned over their domains with very little interference from the  bakufu in Kyoto. Tokugawa Shoguns Toward the end of the Ashikaga bakufu,  and for years thereafter, Japan suffered through nearly 100 years of civil war, fueled mainly by the increasing power of the daimyo. Indeed, the civil war was sparked by the ruling bakufus struggle to bring the warring  daimyo back under central control. Tokugawa Ieyasu. KanÃ…  TanyÃ… « / Public domain / Wikimedia Common In 1603, however, Tokugawa Ieyasu completed this task and established the Tokugawa shogunate- or bakufu- which would rule in the emperors name for 265 years. Life in Tokugawa Japan was peaceful but heavily controlled by the shogunal government, but after a century of chaotic warfare, the peace was a much-needed respite. Fall of the Bakufu When U.S.Commodore Matthew Perry  steamed into Edo Bay (Tokyo Bay) in 1853 and demanded that  Tokugawa Japan  allow foreign powers access to trade, he unwittingly sparked a chain of events that led to Japans rise as a modern imperial power and the fall of the bakufu. Japans political elites realized that the U.S. and other countries were ahead of Japan in terms of military technology and felt threatened by western imperialism. After all, powerful  Qing China  had been brought to its knees by Britain just 14 years earlier in the  First Opium War  and would soon lose the Second Opium War as well. Meiji Restoration Rather than suffer a similar fate, some of Japans elites sought to close the doors even tighter against foreign influence, but the more foresighted began to plan a modernization drive. They felt that it was important to have a strong emperor at the center of Japans political organization to project Japanese power and fend off Western imperialism. As a result, in 1868, the Meiji Restoration extinguished the bakufus authority and returned political power to the emperor. And, nearly 700 years of Japanese rule by the bakufu  came to a sudden end.

Mass-spectrometer (another copy) Essay Example | Topics and Well Written Essays - 3000 words

Mass-spectrometer (another copy) - Essay Example ion concentrations of shared elements for all the drugs as well as, once detected these chemical elements will be matched with a catalogue of chemical compounds; an illustration of this process is described in the report as well as an assessment on the limitations, design specifications, besides recommendations for enhanced dependability. Basically, a mass spectrometer performs three important roles (Figure 1). Initially, it bombards the molecules to be analyzed with a stream of high-energy electrons, transforming a number of the molecules to ions, which are then fast-tracked in an electric field by a sequence of polarized fast-tracking plates, a huge potential difference (p.d), oscillating from 1 to 10 kV (kilovolts), applied across these fast-tracking plates yields a beam of briskly roaming positive ions. Moreover, one or more focusing slits subject the ions into a uniform beam. What is more, majority of the sample molecules do not undergo ionization, nonetheless, are incessantly drawn off by vacuum pumps which are linked to the ionization chamber; whereas some of the molecules are changed to negative ions by the absorption of electrons. Consequently, the repeller plates engross these negatively charged ions. Besides, a number of the positively charged ions which are produced can possess a charge greater than one ( a loss of in excess of a single electron). These are fast-tracked in a similar way as the singly charged positive ions. Secondly, the fast-tracked ions are isolated consistent with their mass-to-charge ratios in an electric or magnetic field by a deflection that transpires through an applied magnetic field. Finally, the ions that have a specific mass-to-charge ratio are identified by a detector device which can tally the number of ions reaching it that have negotiated the static-curved radius of arc because of the applied magnetic field (Figure 2). Additionally, particles with mass-to-charge ratios which are both too large as well as too small hit