Resource Letter GrW-1: Gravitational Waves

This Resource Letter provides a guide to the literature on the physics and astrophysics of gravitational waves. Journals, books, reports, archives, and websites are provided as basic resources and for current research frontiers in detectors, data analysis, and astrophysical source modeling.Comment: AAPT/AJP Resource Letter, American Journal of Physics, in press, 9 pages, 97 reference

Intercellular Migration of Centrioles in the Germarium of \u3cem\u3eDrosophila melanogaster\u3c/em\u3e. An Electron Microscopic Study

A cluster of centrioles has been found in the early Drosophila oocyte. Since the oocyte is connected to 15 nurse cells by a system of intercellular bridges or ring canals, the possibility that the cluster of centrioles arose in the germarium from an intercellular migration of centrioles from the nurse cells to the oocyte was analyzed in serial sections for the electron microscope. Initially, all of the 16 cells of the future egg chambers possess centrioles, which are located in a juxtanuclear position. At the time the 16 cell cluster becomes arranged in a lens-shaped layer laterally across the germarium, the centrioles lose their juxtanuclear position and move towards the oocyte. By the time the 16 cell cluster of cells is surrounded by follicle cells (Stage 1), between 14 and 17 centrioles are found in the oocyte. Later, these centrioles become located between the oocyte nucleus and the follicle cell border and become aggregated into a cluster less than 1.5 µ in its largest dimension. The fate of these centrioles in the oocyte is not known. The fine structure of the germarium and the early oocyte is also described

Transitional effects of a pension system change in Spain

This paper studies the output effects, transition costs and the change in pension benefits derived from the substitution of the current unfunded pension system by a fully funded pension system financed through mandatory savings. These effects are estimated by using reduced versions of the neoclassical and endogenous growth frameworks. Because of the greater capital accumulation during the transition phase, final output increases by 23,6% (neoclassical framework); and a 24,5-31,5% (endogenous growth framework). The initial revenue loss for the government would represent a 4,8% of the GDP, raising very slowly during the transition period. Given the new growth rates, rates of return of physical capital, and financial intermediation costs, we have that the capitalization pension benefits obtained by all 30-contribution-year worker would be more than twice than those that guarantee the financial sustainability of the public pension systemEste artículo estudia los efectos sobre la producción, los costes de la transición y el cambio en las pensiones que se derivan de una substitución del actual sistema público de pensiones por otro alternativo de capitalización, financiado mediante ahorro obligatorio. Estos efectos se estiman utilizando versiones reducidas de los modelos de crecimiento neoclásico y endógeno. Debido a la mayor acumulación de capital durante la fase de transición, la producción final crece un 23,6% (modelo neoclásico); y entre un 24,5-31,5%(modelo de crecimiento endógeno). La pérdida de ingresos para el estado en el primer año equivaldría a un 4,8% del PIB, creciendo muy lentamente durante el período de transición. Dadas las nuevas tasas de crecimiento económico, las tasas de rentabilidad del capital físico y los costes financieros de intermediación, se obtiene que las pensiones de capitalización que alcanzaría todo trabajador con 30 años de cotizaciones serían más del doble que las que se pagarían en el sistema público de pensiones una vez garantizado su viabilidad financiera

Oral Health Care Access in New Hampshire

In this brief, authors Eleanor M. Jaffee, Joan Widmer, and Lisa I. Speropolous provide an overview of the current state of oral health care in New Hampshire. They report that although New Hampshire is rated above the national average on most measures of pediatric oral health, performance varies substantially by county and by region. Access to adequate oral health care for both children and adults is particularly challenging for low-income families in the sparsely populated northern region of the state. Programs that address oral health care access issues by bringing services to those with the greatest need, such as school-based dental sealant programs and mobile dental care units, are among current efforts to improve oral health across the state

An adjustment inventory for primary grades

Thesis (M.A.)--Boston Universit

Experiment Definition Using the Space Laboratory, Long Duration Exposure Facility, and Space Transportation System Shuttle

Candidate experiments designed for the space shuttle transportation system and the long duration exposure facility are summarized. The data format covers: experiment title, Experimenter, technical abstract, benefits/justification, technical discussion of experiment approach and objectives, related work and experience, experiment facts space properties used, environmental constraints, shielding requirements, if any, physical description, and sketch of major elements. Information was also included on experiment hardware, research required to develop experiment, special requirements, cost estimate, safety considerations, and interactions with spacecraft and other experiments