If qα is the Euler factor of an odd perfect number N, then we prove that its so-called index σ(N/qα) � qα ≥ 32 × 5× 7 = 315. It follows that for any odd perfect number, the ratio of the non-Euler part to the Euler part is greater than 32 × 5× 7/2.

US Army Research Laboratory researchers designed a head-up display (HUD) that overlays driving information on a switchable vision block. Bradley and Stryker drivers were surveyed for recommendations to incorporate in the prototype. A simulation experiment was conducted to evaluate a HUD versus a traditional head-down display (HDD). Results about driving task performance were mixed, with the HUD...

Synaptic transmission involves protein-protein interactions underlying presynaptic transmitter release and postsynaptic signal reception and propagation. Recently, interaction proteomics technology enabled us to elucidate the constituents of synaptic protein complexes, and to detect both known and novel interactors without bias. The pre-synaptic protein network dynamically regulates synaptic ve...

With the rapid advance of the Internet, management of structured documents such as XML documents has become more and more important (Marchiori, 1998; Suciu & Vossen, 2000). As a simplified version of SGML, XML is recommended by W3C (World Wide Web Consortium, 1998a) as a document description metalanguage to exchange and manipulate data and documents on the WWW. It has been used to code various ...

Magnetostratigraphy of sedimentary rock deposited in the Chaka basin (north-easternTibetan Plateau) indicates a lateMiocene onset of basin formation and subsequent development of the adjacent Qinghai Nan Shan. Sedimentation in the basin initiated at 11Ma. In the lower part of the basin ¢ll, a coarsening-upward sequence starting at 9Ma, as well as rapid sedimentation rates, and northward paleocu...

The goal of this project was to provide an algorithm to produce an optimized VLSI placement of a circuit using a multi-level quadratic placement scheme of our own choice. We were to select and implement a C++ coarsening/uncoarsening scheme as well as a quadratic initial placement and refinement algorithm. A program (Domino) was provided to generate a detailed placement from our global placement...

We have studied the orogenic fragile deformation of upper Earth's crust several areas Eurasian continent, where deformations occurred many times -- in Tian Shan and Altai-Sayan regions Central Asian Paleozoic Fold Belt Baltic region Fennoscandian Shield (East European Platform). Our processing data on trends more than 4000 faults allows us to identify fault systems relationships among these sys...