UScholar Works
 
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CreatorTitleDescriptionSubjectDate
151 Lupton, John MarkIntermittency in second-harmonic radiation from plasmonic hot spots on rough silver filmsSurface enhancement of electromagnetic fields in plasmonic hot spots formed on rough silver films enables the observation of second-harmonic generation (SHG) from single metal nanoparticles. Nonlinear light scattering from these particles exhibits blinking in analogy to luminescence from single qu...Harmonic radiation; Plasmonic hot spots; Second harmonic generation; SHG2009-10
152 Hall, ThadInternet voting in comparative perspective: the case of EstoniaABSTRACT Several countries have conducted Internet voting trials in binding public elections over the past decade, including Switzerland, the United Kingdom, and the United States. However, Estonia-a former Soviet republic and now a full member of the European Union-has advanced the farthest in dep...2009-07
153 Goller, FranzLow-dimensional dynamical model for the diversity of pressure patterns used in canary songDuring song production, oscine birds produce large air sac pressure pulses. During those pulses, energy is transferred to labia located at the juncture between the bronchii and the trachea, inducing the high frequency labial oscillations which are responsible for airflow modulations, i.e., the utt...Serinus canarias; Air sac pressure2009-04
154 Sokolsky, PierreMeasurement of the flux of ultra high energy cosmic rays by the stereo techniqueThe High Resolution Fly's Eye (HiRes) experiment has measured the flux of ultrahigh energy cosmic rays using the stereoscopic air fluorescence technique. The HiRes experiment consists of two detectors that observe cosmic ray showers via the fluorescence light they emit. HiRes data can be analyzed i...Ultrahigh energy cosmic rays; Fluorescence; Energy spectrum; GZK cutoff2009-08
155 Harrison, Reid R.Measuring neural correlates of insect escape behaviors using a miniature telemetry systemThe firing patterns of visual neurons tracking approaching objects need to be translated into appropriate motor activation sequences to generate escape behaviors. Locusts possess an identified neuron highly sensitive to approaching objects (looming stimuli), thought to play an important role in ...Escape behaviors; Collision avoidance; Looming stimuli; Lobula Giant Motion Detector (LGMD); Telemetry2009-04
156 Mishchenko, EugeneMesoscopic spin-Hall effect in 2D electron systems with smooth boundariesThe spin-Hall effect in a ballistic 2D electron gas with Rashba-type spin-orbit coupling and smooth edge confinement is studied. We predict that the interplay of semiclassical electron motion and quantum dynamics of spins leads to several distinct features in spin density along the edge that origina...Spin- Hall effect; 2D electron systems2009-05
157 Dawson, KyleMulti-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1The galaxy cluster XMMU J2235.3−2557 (hereafter XMM2235), spectroscopically confirmed at z = 1.39, is one of the most distant X-ray selected galaxy clusters. It has been at the center of a multi-wavelength observing campaign with ground and space facilities. Aims. We characterize the galaxy popula...XMMU J2235.3-2557; XMM2235; X-rays; Redshift2009-12
158 Khan, Faisal HabibMultiple-load-source integration in a multilevel modular capacitor-clamped DC-DC converter featuring fault tolerant capabilityA multilevel modular capacitor-clamped dc-dc converter (MMCCC) will be presented in this paper with some of its advantageous features. By virtue of the modular nature of the converter, it is possible to integrate multiple loads and sources with the converter at the same time. The modular construct...DC-DC power conversion; Power capacitors; Power conversion; Power MOSFETs; Capacitor-clamped converter2009-01
159 Dawson, KyleMultiwavelength observations of a rich galaxy cluster at z ~ 1: the HST/ACS colour-magnitude diagramXMMU J1229+0151 is a rich galaxy cluster with redshift z = 0.975 that was serendipitously detected in X-rays within the scope of the XMM-Newton Distant Cluster Project. Both HST/ACS observations in the i775 and z850 passbands and VLT/FORS2 spectroscopy were obtained, in addition to follow-up Near-In...Passive galaxies; Redshift2009-07
160 Boehme, ChristophObservation of precursor pair formation of recombining charge carriersAn experiment is presented which allows the observation of charge-carrier pair formation that precedes electronic transitions such as spin-dependent recombination or spin-dependent transport. It is based on an electrically detected magnetic-resonance-induced rotary echo sequence. The experimental de...Charge carriers2009-07
161 Vardeny, Zeev ValentineOptical probes of ∏-conjugated polymer blends with strong acceptor moleculesWe used a variety of optical probes to study the primary and long-lived photoexcitations in blends of polyphenylene-vinylene derivative poly(2-methoxy-5(2'-ethyl)hexoxy-phenylenevinylene) (MEH-PPV) with various concentrations of a strong electron-acceptor molecule 2,4,7-trinitro-9-fluorenone (TNF...pi-conjugated polymers; pi-conjugated polymer blends; Acceptor molecules; Optical probes; Photoexcitations; MEH-PPV; Electron acceptors; Organic solar cells2009-05
162 Balasubramonian, RajeevOptimizing communication and capacity in a 3D stacked reconfigurable cache hierarchyCache hierarchies in future many-core processors are expected to grow in size and contribute a large fraction of overall processor power and performance. In this paper, we postulate a 3D chip design that stacks SRAM and DRAM upon processing cores and employs OS-based page coloring to minimize hori...Multi-core processors; Cache and memory hierarchy; Non-uniform cache architecture (NUCA); Page coloring; On-chip networks; SRAM/DRAM cache reconfiguration2009-02
163 Cashdan, Elizabeth A.Sex differences in aggression: what does evolutionary theory predict?The target article claims that evolutionary theory predicts the emergence of sex differences in aggression in early childhood, and that there will be no sex difference in anger. It also finds an absence of sex differences in spousal abuse in Western societies. All three are puzzling from an evolutio...2009-08
164 Gondolo, PaoloSolar neutrino limit on axions and keV-mass bosonsThe all-flavor solar neutrino flux measured by the Sudbury Neutrino Observatory constrains nonstandard energy losses to less than about 10% of the Sun's photon luminosity, superseding a helioseismological argument and providing new limits on the interaction strength of low-mass particles. For the ...Interaction strength; keV-mass2009-05
165 Khan, Faisal HabibSwitching cells and their implications for power electronic circuitsThis paper will introduce two basic switching cells, P-cell and N-cell, along with their implications and applications in power electronic circuits. The concept of switching cells in power electronic circuits started in the late 1970's. The basic cells presented in this paper have one switching ele...2009-05
166 Vardeny, Zeev Valentine; Nahata, AjayTerahertz spectroscopy of plasmonic fractalsWe use terahertz time-domain spectroscopy to study the transmission properties of metallic films perforated with aperture arrays having deterministic or stochastic fractal morphologies (‘‘plasmonic fractals''), and compare them with random aperture arrays. All of the measured plasmonic fractals...Plasmonic fractals; Random aperture arrays2009-03
167 Vardeny, Zeev ValentineUltrafast dynamics in metallic and semiconducting carbon nanotubesTransient polarized pump/probe transmission changes upon pulse photoexcitation at 1.6 eV were measured in chiral enriched carbon nanotubes ensembles of both metallic and semiconductor characters, in a very broad probe spectral range from mid-IR to visible, combining several ultrafast laser systems...2009-11
168 Lupton, John MarkUnraveling the inhomogeneously broadened absorption spectrum of conjugated polymers by single-molecule light-harvesting action spectroscopyThe distribution of chromophores in single polymer chains is revealed by photoluminescence excitation spectroscopy under excitation of the backbone and detection of emission from an end cap. Spectral broadening in excitation exceeds that in emission. An increase in vibronic coupling for shorter (h...Spectral broadening; Chromophores2009-10
169 Couldwell, William T.Unruptured posterior communicating artery aneurysm presenting with gustatory seizures and temporal lobe edemaUnruptured cerebral aneurysms presenting with seizures are unusual. We describe a case of a growing middle cerebral artery aneurysm presenting with gustatory seizures with magnetic resonance imaging showing peri-aneurysmal edema. This case is the first to show temporal lobe edema associated with inc...Seizure; Brain edema; PCOM2009-04
170 Freire, Juliana; Silva, Claudio T.VisMashup: streamlining the creation of custom visualization applicationsVisualization is essential for understanding the increasing volumes of digital data. However, the process required to create insightful visualizations is involved and time consuming. Although several visualization tools are available, including tools with sophisticated visual interfaces, they are o...VisMashup; Dataflow; Visualization systems; Mashups; Medleys2009-11
171 DeTar, CarletonVisualization of semileptonic form factors from lattice QCDComparisons of lattice-QCD calculations of semileptonic form factors with experimental measurements often display two sets of points, one each for lattice QCD and experiment. Here we propose to display the output of a lattice-QCD analysis as a curve and error band. This is justified, because lattice...Semileptonic decay2009-08
172 Hansen, Charles D.Volume Ray casting with peak finding and differential samplingDirect volume rendering and isosurfacing are ubiquitous rendering techniques in scientific visualization, commonly employed in imaging 3D data from simulation and scan sources. Conventionally, these methods have been treated as separate modalities, necessitating different sampling strategies and ren...2009-11
173 Harrison, Reid R.Wireless integrated circuit for 100-channel charge-balanced neural stimulationThe authors present the design of an integrated circuit for wireless neural stimulation, along with benchtop and in-vivo experimental results. The chip has the ability to drive 100 individual stimulation electrodes with constant-current pulses of varying amplitude, duration, interphasic delay, and ...Wireless integrated circuit; Low-power2009-12
174 Harrison, Reid R.Wireless neural recording with single low-power integrated circuitWe present benchtop and in vivo experimental results from an integrated circuit designed for wireless implantable neural recording applications. The chip, which was fabricated in a commercially available 0.6- m 2P3M BiCMOS process, contains 100 amplifiers, a 10-bit analog-to-digital converter (ADC...2009-08
175 Mallat, Chibli'A conversation to be had' on war and law: Obama's Nobel speechEven more than in the Cairo address, the Nobel speech will mark the Obama legacy. The subject is pithy, combining defense, foreign affairs and international law on the most difficult subject that human kind has ever addressed: war. Thanks to the entreaty of the Nobel committee, which forced the US p...2009-12-24
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