We present Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the post-asymptotic giant branch star von Zeipel 1128 (l = 42. 5, b = +78. 7; d = 10.2 kpc, z = 10.0 kpc; vLSR = −140± 8 km s), located in the globular cluster Messier 3. The FUSE observations cover the wavelength range 905 – 1187 Å at ∼ 20 km s (FWHM) resolution. These data exhibit many photospheric and interstellar absor...

We present results from an ongoing survey dedicated to the ionized gas kinematics of Virgo cluster spiral galaxies using Fabry-Perot (FP) interferometry. Our goal is to study the environmental effects on galaxy evolution in the Virgo cluster. We report here on the Hα distribution map and velocity field of NGC 4438, the prototype of an interacting galaxy near the centre of the cluster. 1. Introd...

We have imaged the 880 μm continuum emission from the “proplyds” in the center of the Trapezium Cluster in Orion using the Submillimeter Array with a beam size 1. 5 FWHM and an rms of 2.7 mJy. Five sources are detected with fluxes in the range 18 to 38 mJy, which includes dust emission from four proplyds and ionized gas from θ OriG. The total masses of the detected proplyds derived from their d...

MOTIVATION Most existing identity-by-descent (IBD) detection methods only consider haplotype pairs; less attention has been paid to considering multiple haplotypes simultaneously, even though IBD is an equivalence relation on haplotypes that partitions a set of haplotypes into IBD clusters. Multiple-haplotype IBD clusters may have advantages over pairwise IBD in some applications, such as IBD m...

Laser filamentation is understood to be self-channeling of intense ultrashort laser pulses achieved when the self-focusing because of the Kerr nonlinearity is balanced by ionization-induced defocusing. Here, we show that, right behind the ionized region of a laser filament, ultrashort laser pulses can couple into a much longer light channel, where a stable self-guiding spatial mode is sustained...

In the laser deposition of single crystal and directionally-solidified superalloys, it is desired to form laser deposits with high volume fractions of columnar grains by suppressing the columnar-to-equiaxed transition efficiently. In this paper, the influence of beam profile (circular and square shapes) and cooling conditions (natural cooling and forced cooling) on the geometric morphology and ...

We present systematic studies on the absolute density of hydrogen cluster beams produced by using Laval-nozzles. Measurements of the cluster beam density as function of the nozzle temperature and the gas input pressure result in maximum cluster beam densities for cases where the gas is already in a supersaturated state before passing the nozzle. The influence of the gas flow through the nozzle ...

The growth of Ge three-dimensional coherent clusters on Si~001! during gas source molecular-beam epitaxy and post-deposition anneals has been investigated using in situ elevated-temperature scanning tunneling microscopy. By monitoring the growth of individual so-called ‘‘hut’’ clusters, this technique allowed us to separate various factors that may affect the final size distribution of entire c...

The Target Group has recently begun to apply ion beam sputter deposition for target pusher layer fabrication. Metal deposition on both levitated and stalk-mounted fusion targets has been demonstrated. We believe this is the first application of this versatile deposition technique to IF target pusher layerfabrication. Our initial results indicate that ion beam sputtering is far more controllable...