Remote sensing of Pacific hurricane and radiometric measurements from foam and slicks

There are no author-identified significant results in this report

SHOP2: An HTN Planning System

The SHOP2 planning system received one of the awards for distinguished performance in the 2002 International Planning Competition. This paper describes the features of SHOP2 which enabled it to excel in the competition, especially those aspects of SHOP2 that deal with temporal and metric planning domains

Entangling two superconducting LC coherent modes via a superconducting flux qubit

Based on a pure solid-state device consisting of two superconducting LC circuits coupled to a superconducting flux qubit, we propose in this paper that the maximally entangled coherent states of the two LC modes can be generated for arbitrary coherent states through flux qubit controls.Comment: 5 pages, 2 figure

How Can Dolphins Recognize Fish According to Their Echoes? A Statistical Analysis of Fish Echoes

Echo-based object classification is a fundamental task of animals that use a biosonar system. Dolphins and porpoises should be able to rely on echoes to discriminate a predator from a prey or to select a desired prey from an undesired object. Many studies have shown that dolphins and porpoises can discriminate between objects according to their echoes. All of these studies however, used unnatural objects that can be easily characterized in human terminologies (e.g., metallic spheres, disks, cylinders). In this work, we collected real fish echoes from many angles of acquisition using a sonar system that mimics the emission properties of dolphins and porpoises. We then tested two alternative statistical approaches in classifying these echoes. Our results suggest that fish species can be classified according to echoes returning from porpoise- and dolphin-like signals. These results suggest how dolphins and porpoises can classify fish based on their echoes and provide some insight as to which features might enable the classification

Overlapping Unit Cells in 3d Quasicrystal Structure

A 3-dimensional quasiperiodic lattice, with overlapping unit cells and periodic in one direction, is constructed using grid and projection methods pioneered by de Bruijn. Each unit cell consists of 26 points, of which 22 are the vertices of a convex polytope P, and 4 are interior points also shared with other neighboring unit cells. Using Kronecker's theorem the frequencies of all possible types of overlapping are found.Comment: LaTeX2e, 11 pages, 5 figures (8 eps files), uses iopart.class. Final versio

New Results for the Correlation Functions of the Ising Model and the Transverse Ising Chain

In this paper we show how an infinite system of coupled Toda-type nonlinear differential equations derived by one of us can be used efficiently to calculate the time-dependent pair-correlations in the Ising chain in a transverse field. The results are seen to match extremely well long large-time asymptotic expansions newly derived here. For our initial conditions we use new long asymptotic expansions for the equal-time pair correlation functions of the transverse Ising chain, extending an old result of T.T. Wu for the 2d Ising model. Using this one can also study the equal-time wavevector-dependent correlation function of the quantum chain, a.k.a. the q-dependent diagonal susceptibility in the 2d Ising model, in great detail with very little computational effort.Comment: LaTeX 2e, 31 pages, 8 figures (16 eps files). vs2: Two references added and minor changes of style. vs3: Corrections made and reference adde

Do you have better verbal memory if you have better musical ability and musical intelligence?

The current study investigated whether better musical ability and better musical intelligence were related to better verbal memory, based on the findings that musicians have larger left Planum Temporale that is also involved in one’s verbal memory. Forty-one undergraduates participated in a musical ability test that examined pitch discrimination, rhythmic and melodic patterns identification and music reading. Musical intelligence of multiple intelligence and verbal memory were also examined. Participants were then divided into high- and low- ability groups based on their overall musical ability, their ability to discriminate pitch, to identify music pattern, to read music, and their musical IQ. Results showed that participants with formal music training were better in pitch discrimination, music reading and musical IQ. However, they did not perform better than their counterparts who received no musical training in verbal memory. Further analysis illustrated that participants who had high ability in their overall musical ability, pitch discrimination, pattern identification, music reading and musical intelligence did not have better verbal memory than their low-ability counterparts. None of the musical abilities correlated significantly with verbal memory. It was concluded that music training, though can improve individuals’ musical ability and musical IQ, does not necessarily result in better verbal memory. The sensitivity of the music test used might provide insights on the current findings. The relationship between musical ability and verbal memory requires further investigation. Practical implications of music in various cognitive tasks were discussed

Measurements of Carrier Generation-Recombination Parameters in Silicon Solar Cell Material Using MOS Techniques

Modified and new measurement techniques were developed for determining the carrier generation-recombination (G-R) parameters in silicon solar cell material under carrier deficit and low-level carrier excess conditions using MOS-based test structures. The structures mainly consisted of ring-dot MOS Capacitors (MOS-C) and Schottky-Drained Gate-Controlled Diodes (SGCD). Sample G-R parameters were extracted from n-type high quality silicon solar cell material. Additional measurements were also performed on low-quality ntype silicon substrates for comparison purposes. The photoaccelerated MOS-C Capacitance-time (C-t) transient measurement technique, modified from the standard C-t method, allows one to drastically reduce the observation time in deducing the carrier generation lifetime (Tg) by simply illuminating the test structure during the transient. In applying the technique to MOS-C’s (which exhibited generation lifetime on the order of I msec) the observation time was reduced by approximately an order of magnitude. This is important in dealing with solar cell material because of typically long generation lifetimes. The SGCD structure, which consisted of an extended Schottky diode located next to an MOS-C, was developed and utilized for extracting the surface generation velocity (sg). The measurement is based on recording two C-t transients at Vd = 0 and at Vd = V t , respectively. The structure has a distinct advantage over the conventional PN junction GCD in that it is only slightly more complicated to fabricate and interrogate than a simple MOS-C. It was also demonstrated that steady-state deep-depletion C-V characteristics can be obtained using the SGCD structure. An MOS-C photo/forward-sweep measurement technique was primarily developed to extract the recombination lifetime (rp for n-type substrates) under low-level carrier excess conditions. The new technique is based on the change in inversion capacitance in response to a set of illumination and forward-sweep voltages applied to the MOS-C. The technique conveniently allows one to extract the recombination lifetime under room temperature conditions and was successfully applied to MOS-C’s fabricated on high quality silicon solar cell substrates

A wideband linear tunable CDTA and its application in field programmable analogue array

This document is the Accepted Manuscript version of the following article: Hu, Z., Wang, C., Sun, J. et al. ‘A wideband linear tunable CDTA and its application in field programmable analogue array’, Analog Integrated Circuits and Signal Processing, Vol. 88 (3): 465-483, September 2016. Under embargo. Embargo end date: 6 June 2017. The final publication is available at Springer via https://link.springer.com/article/10.1007%2Fs10470-016-0772-7 © Springer Science+Business Media New York 2016In this paper, a NMOS-based wideband low power and linear tunable transconductance current differencing transconductance amplifier (CDTA) is presented. Based on the NMOS CDTA, a novel simple and easily reconfigurable configurable analogue block (CAB) is designed. Moreover, using the novel CAB, a simple and versatile butterfly-shaped FPAA structure is introduced. The FPAA consists of six identical CABs, and it could realize six order current-mode low pass filter, second order current-mode universal filter, current-mode quadrature oscillator, current-mode multi-phase oscillator and current-mode multiplier for analog signal processing. The Cadence IC Design Tools 5.1.41 post-layout simulation and measurement results are included to confirm the theory.Peer reviewedFinal Accepted Versio