Context. Near-earth objects (NEOs), thanks to their proximity, provide a unique opportunity investigate asteroids with diameters down dozens of meters. The study NEOs is also important because potential hazard the Earth. investigation small challenging from Earth as they are observable only for short time following discovery and can sometimes be reached again years or decades later. Aims. We ai...

Abstract We search for escaping helium from the hot super-Earth 55 Cnc e by taking high-resolution spectra of 1083 nm line during two transits using Keck/NIRSPEC. detect no absorption down to a 90% upper limit 250 ppm in excess or 0.27 mÅ equivalent width. This corresponds mass-loss rate less than ?10 9 g s ?1 assuming Parker wind model with plausible exosphere temperature 5000–6000 K, although...

Objective: The objective of the paper is to understand leadership in an online community, specifically, Wikipedia. Background: Wikipedia successfully aggregates millions of volunteers’ efforts to create the largest encyclopedia in human history. Without formal employment contracts and monetary incentives, one significant question for Wikipedia is how it organizes individual members with differi...

Dioscin is a biologically active steroidal saponin with anticancer and hepatoprotective effects. A rapid, selective, and sensitive liquid chromatographic method with electrospray ionization tandem mass spectrometry was developed for the quantification of dioscin in rat plasma. Dioscin was extracted from rat plasma using ethyl acetate at acidic pH. The analytes were separated on a Halo C18 colum...

In an experiment at the SISSI/LISE3 facility of GANIL, the most proton-rich zinc isotopes 55,56 Zn have been observed for the first time. The experiment was performed using a high-intensity 58 Ni beam at 74.5 MeV/nucleon impinging on a nickel target. The identification of 55,56 Zn opens the way to 54 Zn, a good candidate for two-proton radioactivity according to theoretical predictions. Nuclear...

We present a planar helical undulator designed to produce elliptically polarized light. Helical magnetic fields may be produced by a variety of undulatory with four parallel cassettes of magnets. In our design, all cassettes are mounted in two planes on slides so that they maybe moved parallel to the electron beam. This allows us to produce x-rays of left-or right-handed elliptical or circular ...

* We thank to the Institute of Household Economy (Kakei-Keizai-Kenkyu-Sho) for providing us micro-level data from the Japanese Panel Survey of Consumption. We also thank to participants at the ESRI seminar. The views expressed in this paper are those of authors' and do not necessarily represent those of the Economic and Social Research Institute or of the Japanese Government. Abstract The 1990s...

Plant pathologist George Zentmyer, Professor Emeritus in the Riverside branch of the University of California, has devoted much of his life to the benefit of avocado growers worldwide. He is widely known in our industry, respected and revered. Dr. Zentmyer has for forty-eight years enlightened members of the California Avocado Society through his annual contributions to the Yearbook. In this ar...

© SINPE-GASAPE ABSTRACT: A central venous access is needed in most patients who are candidates for parenteral nutrition. The technology of these devices has changed considerably since their initial use, one of the most recent trends being the delivery of parenteral nutrition through a peripherally inserted central catheter. Usually composed of silicone elastomer or secondor third-generation pol...