Method for copper staining of germanium crystals

Proper conditions for copper staining of germanium crystals include a low solution temperature of 3 degrees C, illumination of the sample by infrared light, and careful positioning of the light source relative to the sample so as to minimize absorption of the infrared light

Bimodalities : a survey of experimental data and models

Bimodal distributions of some chosen variables measured in nuclear collisions were recently proposed as a non ambiguous signature of a first order phase transition in nuclei. This section presents a compilation of both theoretical and experimental studies on bimodalities performed so far, in relation with the liquid-gas phase transition in nuclear matter.Comment: 12 pages, 18 figures, 1 table Appeared in European Physics Journal A as part of the Topical Volume "Dynamics and Thermodynamics with Nuclear Degrees of Freedom

Curbing the HIV Epidemic by Supporting Effective Engagement in HIV Care: Recommendations for Health Plans and Health Care Purchasers

The United States is poised to dramatically reduce the scope of its HIV epidemic, but this demands increased leadership and attention from health plans and health care purchasers (including Medicaid, Medicare, marketplaces, and other private purchasers). This new amfAR report identifies changes in policy and practice in clinics, communities, and health care programs to reduce unnecessary health spending, increase the effectiveness of services, and increase the integration of services. Done right, the same steps that lead to appropriate management of care by health plans and purchasers also will help to achieve national public health goals

Isospin diffusion in semi-peripheral 58Ni^{58}Ni + 197Au^{197}Au collisions at intermediate energies (II): Dynamical simulations

We study isospin effects in semi-peripheral collisions above the Fermi energy by considering the symmetric $^{58}Ni$ + $^{58}Ni$ and the asymmetric reactions $^{58}Ni$ + $^{197}Au$ over the incident energy range 52-74 A MeV. A microscopic transport model with two different parameterizations of the symmetry energy term is used to investigate the isotopic content of pre-equilibrium emission and the N/Z diffusion process. Simulations are also compared to experimental data obtained with the INDRA array and bring information on the degree of isospin equilibration observed in Ni + Au collisions. A better overall agreement between data and simulations is obtained when using a symmetry term which linearly increases with nuclear density

Entre date et datation, deux ou trois réflexions sur la chronologie des céramiques

International audienceLes études céramiques ont des implications directes sur la manière de dater les sites et par conséquent sur les phases de l'émergence et du développement antiques des villes, d'apprécier l'évolution des occupations en milieu rural, de préciser les transformations des modes funéraires, de déterminer l'adoption de nouvelles pratiques alimentaires, etc. Cette importance de ces fossiles-directeurs, souvent les seuls retrouvés dans les strates d'un site archéologique, nécessite la reprise de quelques notions fondamentales : date et datation, chronologie

Entre date et datation, deux ou trois réflexions sur la chronologie des céramiques

International audienceLes études céramiques ont des implications directes sur la manière de dater les sites et par conséquent sur les phases de l'émergence et du développement antiques des villes, d'apprécier l'évolution des occupations en milieu rural, de préciser les transformations des modes funéraires, de déterminer l'adoption de nouvelles pratiques alimentaires, etc. Cette importance de ces fossiles-directeurs, souvent les seuls retrouvés dans les strates d'un site archéologique, nécessite la reprise de quelques notions fondamentales : date et datation, chronologie