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PubMed2006

Generation of a superposition of odd photon number states for quantum information networks.

We report on the experimental observation of quantum-network-compatible light described by a nonpositive Wigner function. The state is generated by photon subtraction from a squeezed vacuum state produced by a continuous wave optical parametric amplifier. Ideally, the state is a coherent superposition of odd photon number states, closely resembling a superposition of weak coherent states |alpha > - |-alpha >. In the limit of low squeezing the state is basically a single photon state. Light is generated with about 10,000 and more events per second in a nearly perfect spatial mode with a Fourier-limited frequency bandwidth which matches well atomic quantum memory requirements. The generated state of light is an excellent input state for testing quantum memories, quantum repeaters, and linear optics quantum computers.

Journal Article↗
PubMed1997

Contact allergy in patients with periorbital eczema: an analysis of allergens. Data recorded by the Information Network of the Departments of Dermatology.

BACKGROUND: Periorbital eczema may be an expression of a constitutional disease or an irritant or allergic dermatitis. An allergic contract dermatitis is believed to be the most common cause. OBJECTIVE: We tried to determine which allergens may cause an allergic contact dermatitis and if there exists a leading allergen. METHODS: 609 patients with periorbital eczema were assessed with patch testing in 22 hospitals to evaluate the relevance of an allergic contact dermatitis in the pathogenesis of periorbital eczema. Additionally, 116 patients were tested with their own products. RESULTS: 81% of the cases involving the eyelids were women. A relevant allergic contact dermatitis was found in 52% of the patients with periorbital eczema. Furthermore, a positive patch test was present in every third patient with the clinical diagnosis of an atopic dermatitis. Antibiotics, phenylephrine and thimerosal could be determined to be the leading allergens responsible for allergic periorbital eczema. Positive reactions for potassium dichromate and fragrance mix occurred less frequently in patients with periorbital eczema. 132 positive reactions were found in patients tested with their own products, including 33% with a positive reaction to eye ointments, 15% to face creams, 10% to eye shadows, 10% to makeup, 10% to shampoos and 4% to nail varnish. Only 6% reacted to perfume. CONCLUSION: The data underline the importance of performing patch tests in the case of periorbital eczema, especially in atopic patients.

Adult↗
PubMed1994

Establishment of an International Information Network for International Health Development: a survey of public health administration and management courses.

The purpose of the present study was to examine the content emphasis of courses of public health administration and management (A & M) among member institutions of the Asia-Pacific Academic Consortium for Public Health (APACPH), to determine comparability of curricula across campuses. A survey of course syllabi from APACPH schools was conducted by three separate reviewers to identify topical subject matter presented in general and specialty A & M courses delivered to graduate students at each campus. Based on this review, three synthetic general content A & M courses, and one specialty A & M course (i.e. Hospital Administration) were created as a basis for intercampus cross-institutional comparisons conducted by the author. Despite the number of courses provided by the different APACPH institutions, specific content areas consistently appeared across institutions, suggesting possible foundational A & M content for public health students. In general, there was much better coverage of similar topics at the introductory level of instruction, and much greater consistency was observed across institutions that provided course work addressing the administration of hospitals. Several recommendations are made for further studies of other content areas, and for the development of minimum training content areas as a basis for cross-institutional studies.

Asia↗