Photon correlations in positron annihilation

The two-photon positron annihilation density matrix is found to separate into a diagonal center of energy factor implying maximally entangled momenta, and a relative factor describing decay. For unknown positron injection time, the distribution of the difference in photon arrival times is a double exponential at the para-Ps decay rate, consistent with experiment (V. D. Irby, Meas. Sci. Technol. 15, 1799 (2004)).Comment: Accepted for publication in Phys. Rev.

The Illinois Biometric Privacy Act: History, Developments, And Adapting Protection for the Future

Biometric technology, used to identify individuals based on their unique, unchangeable attributes such as fingerprints, face prints, and retinas, has grown in use over the last five to ten years as biometrics are incorporated into popular devices and different areas of our lives.1 Today, many people around the world use their face or their thumbprint as a password to unlock their smartphone or complete transactions, and many others use the technology to clock in at work, to see who rang their doorbell at home, or to access secure facilities

The Socialization of Bullying Through Community College Nursing Education: A Multiple Case Study

Many recent studies propose that bullying in the workplace is prevalent and is a phenomenon which occurs in the nursing workplace as well as in nursing education. This qualitative study examined the effects of vertical bullying upon community college nursing students and graduates, and the effect of this behavior upon the socialization of those learning the nursing profession. The study is based on a theoretical framework based on the findings of Salin (2003) and Twale and De Luca (2008) adapting their theory of bullying in academia which incorporated enabling, motivating and precipitating factors leading to intensified bullying. The study investigated the effects vertical bullying has on nursing student and graduate behavior, the socialization of vertical bullying through education, and its possible connection to nursing hierarchy and the academic structure supporting bullying through nursing education

History of Cervical Cancer and the Role of the Human Papillomavirus, 1960-2000

Annotated and edited transcript of a Witness Seminar held on 13 May 2008. Introduction by Professor Anne M Johnson, Division of Population Health and Institute for Global Health, UCL. First published by the Wellcome Trust Centre for the History of Medicine at UCL, 2009. ©The Trustee of the Wellcome Trust, London, 2009. All volumes are freely available online at: www.history.qmul.ac.uk/research/modbiomed/wellcome_witnesses/Annotated and edited transcript of a Witness Seminar held on 13 May 2008. Introduction by Professor Anne M Johnson, Division of Population Health and Institute for Global Health, UCLAnnotated and edited transcript of a Witness Seminar held on 13 May 2008. Introduction by Professor Anne M Johnson, Division of Population Health and Institute for Global Health, UCLAnnotated and edited transcript of a Witness Seminar held on 13 May 2008. Introduction by Professor Anne M Johnson, Division of Population Health and Institute for Global Health, UCLAnnotated and edited transcript of a Witness Seminar held on 13 May 2008. Introduction by Professor Anne M Johnson, Division of Population Health and Institute for Global Health, UCLThe history, largely untold, of the development of cervical cytology, of effective screening and its ultimate success in reducing cervical cancer incidence and mortality, and the viral cause of cervical cancer, took place within a complex social background of changing attitudes to women’s health and sexual behaviour. Dr Georges Papanicolaou’s screening method (the Pap smear) started in the US in the 1940s. It was widely used in the UK a decade later and a national programme of cervical screening was established in 1988. The association of sexually transmitted human papillomavirus (HPV) with cervical cancer was less readily accepted. The detection of HPV16 in cervical cancers at the end of the 1970s was aided by the explosion of laboratory, clinical, and public health research on new screening tests and procedures. These made possible the successful development, licensing and use of preventive vaccines against the major oncogenic HPV types, HPV16 and -18. The Witness Seminar was attended by virologists, cytologists, gynaecologists, epidemiologists and others and addressed the development of cytology as a pathological discipline. They discussed who became cytologists and screeners; the evolution of screening in the UK and elsewhere; the impacts of colposcopy and of HPV; and the discovery of virus-like particles and the development of the HPV vaccine. The meeting was chaired by Professor Glenn McCluggage and the topic was suggested by Professor David Jenkins. Contributors include: Professor Valerie Beral, Professor Saveria Campo, Professor Jocelyn Chamberlain, Professor Dulcie Coleman, Dr Lionel Crawford, Professor Heather Cubie, Professor Jack Cuzick, Dr Ian Duncan, Dr Winifred Gray, Dr Amanda Herbert, Professor David Jenkins, Dr Elizabeth Mackenzie, Dr Joan Macnab, Professor Anthony Miller, Professor Julian Peto, Dr Catherine Pike, Professor Peter Sasieni, Professor Albert Singer, Dr John Smith, Professor Margaret Stanley, Mrs Marilyn Symonds, Dr Anne Szarewski, Professor Leslie Walker, Mr Patrick Walker, Dr Margaret Wolfendale and Professor Ciaran Woodman. Two appendices with reminiscences from Professor Leopold Koss, Dr Arthur Spriggs and Dr O A N (Nasseem) Husain complete the volume. Reynolds L A, Tansey E M. (eds) (2009) History of cervical cancer and the role of human papillomavirus, 1960–2000, Wellcome Witnesses to Twentieth Century Medicine, vol. 38. London: The Wellcome Trust Centre for the History of Medicine at UCL. ISBN 978 085484 1233The Wellcome Trust Centre for the History of MedicineMat UCL is funded by the Wellcome Trust, which is a registered charity, no. 210183

Minutes of the Directors\u27 Meeting, Florida Historical Society

President James C. Craig convened the semi-annual meeting of the officers and board of directors of the Florida Historical Society at 10:00 a.m., January 8, 1972, in the student union building, Stetson University, DeLand. In addition to the president, the following attended: John E. Johns, Margaret Chapman, Mrs. Milton D. Jones, Mary Jane Kuhl, Samuel Proctor, Audrey Broward, Donald W. Curl, Herbert J, Doherty, Jr., William M. Goza, Byron S. Hollinshead, Milton D. Jones, Eugene Lyon, Thelma Peters, Mrs. O. C. Peterson, Anthony Pizza, Jerrell Shofner, John D. Ware, and Robert W. Williams

Photon position measure

The positive operator valued measure (POVM) for a photon counting array detector is derived and found to equal photon flux density integrated over pixel area and measurement time. Since photon flux density equals number density multiplied by the speed of light, this justifies theoretically the observation that a photon counting array provides a coarse grained measurement of photon position. The POVM obtained here can be written as a set of projectors onto a basis of localized states, consistent with the description of photon position in a recent quantum imaging proposal [M. Tsang, Phys. Rev. Lett. \textbf{102}, 253601 (2009)]. The wave function that describes a photon counting experiment is the projection of the photon state vector onto this localized basis. Collapse is to the electromagnetic vacuum and not to a localized state, thus violating the text book rules of quantum mechanics but compatible with the theory of generalized observables and the nonlocalizability of an incoming photon

Uncovering the Intricacies of the Clinical Intake Assessment: How Clinicians Prioritize Information in Complex Contexts

Objective: Based on a single intake interview, mental health clinicians must distill their assessment to brief statements reflecting essential information. We explored how clinicians organize and prioritize the clinical information they collect during the initial assessment of their clients. Method: We conducted in-depth semistructured interviews with a convenience sample of 38 clinicians in four community-and hospital-based mental health clinics in Israel. Clinicians were interviewed immediately following an intake session with 117 clients and were asked about the client’s main problem, evaluation process, rapport with the client, and role of sociocultural factors in assessment. We identified primary themes across interviews. Results: Clinicians prioritized a psychiatric diagnosis based on DSM-5 categories, followed by psychological processes and family and social relationships. Less than a third of clinicians (29.1%) viewed sociocultural and socioeconomic factors as important in discerning expressions of distress. Conclusions: Our findings raise questions about how the structured expectation of diagnosis may influence how clinicians gather and prioritize information