We discuss performance of submicron size hotelectron bolometer (HEB) mixers made from thin MgB2 superconducting films. With a superconducting transition temperature of 30K, such THz mixers can operate with high sensitivity at temperatures up to 20K. Due to very small dimensions local oscillator (LO) power requirements are rather low. In the intermediate frequency (IF) band of 1-3GHz the double...

A novel instrumental setup for measuring infrared photodissociation spectra of buffer gas cooled, mass-selected ions is described and tested. It combines a cryogenically cooled, linear radio frequency ion trap with a tandem mass spectrometer, optimally coupling continuous ion sources to pulsed laser experiments. The use of six independently adjustable DC potentials superimposed over the trappin...

We report photometry with ISO between 60 and 200μm of six galaxies. Three of them are active and the extension of their spectra beyond the IRAS bands up to 200μm confirms our previous conception that most of the dust there is warm and has a fairly uniform temperature of ∼30K. In the other three galaxies which are inactive, we detect a very cold component (∼10K and less) that could hitherto at b...

The class of (n, k)-star graphs and their unidirectional version were introduced as generalizations of star graphs and unidirectional star graphs respectively. In this paper, we substantially improved previously known bound for the the diameter of unidirectional (n, k)-star graphs. The previous bound was 10k−5 for small k and 5k+5b(n−1)/2c for large k; the new bound is 7(k−3)+18. In addition, a...

The Low Energy Neutron Source (LENS) at Indiana University produced its first neutrons in late 2004, and has been engaged in a series of facility upgrades since that time. Among the important developments over the past two years have been the commissioning of klystron-based RF systems, the demonstration of beam peak proton beam currents of more than 20mA, and the low-power operation of a methan...

Let k, r, n be integers with k ≥ 2, 0 ≤ r ≤ k−1 and n ≥ 10k+3. We prove that if G is a graph of order n such that the degree sum of any pair of nonadjacent vertices is at least n−r, then G contains k vertexdisjoint subgraphs Hi, 1 ≤ i ≤ k, such that V (H1) ∪ . . . ∪ V (Hk) = V (G) and such that Hi is a cycle or isomorphic to K1 for each i with 1 ≤ i ≤ r, and Hi is a cycle for each i with r + 1 ...

Anelastic anomalies in LaA12 and (La+O.23at%Gd)Al2 below 10K have been studied by MHz attenuation and sound velocity in the normaland superconducting state. Three anelastic processes involving different lattice defects have been identified. Two of them are shown to exhibit a strong dependence on the concentration of unpaired electrons. For one process this is due to changes in theelectronic com...

The aim of this paper is to improve a theorem of János Kollár by a different method. Given a Complex projective threefold X of general type, suppose the plurigenus Pk(X) ≥ 2, Kollár proved that the (11k+5)-canonical map is birational. Here we show that either the (7k +3)-canonical map or the (7k +5)-canonical map is birational and the m-canonical map is stably birational for m ≥ 13k+6. If we su...

This paper introduces a new approach to acceleration of nonnumeric, database, and information retrieval operations. While traditional techniques accelerate the most time-critical high-level software constructs, we propose novel low-level primitives and demonstrate how these primitives improve database operations. Radix sorting, hashing, and bit-vector operations are used to develop a new class ...

Autism spectrum disorders (ASDs) are common, heritable neurodevelopmental conditions. The genetic architecture of ASDs is complex, requiring large samples to overcome heterogeneity. Here we broaden coverage and sample size relative to other studies of ASDs by using Affymetrix 10K SNP arrays and 1,168 families with at least two affected individuals, performing the largest linkage scan to date wh...