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Creator | Title | Description | Subject | Date |
151 |
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Lupton, John Mark | Intermittency in second-harmonic radiation from plasmonic hot spots on rough silver films | Surface 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; SHG | 2009-10 |
152 |
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Hall, Thad | Internet voting in comparative perspective: the case of Estonia | ABSTRACT 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 |
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Goller, Franz | Low-dimensional dynamical model for the diversity of pressure patterns used in canary song | During 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 pressure | 2009-04 |
154 |
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Sokolsky, Pierre | Measurement of the flux of ultra high energy cosmic rays by the stereo technique | The 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 cutoff | 2009-08 |
155 |
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Harrison, Reid R. | Measuring neural correlates of insect escape behaviors using a miniature telemetry system | The 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); Telemetry | 2009-04 |
156 |
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Mishchenko, Eugene | Mesoscopic spin-Hall effect in 2D electron systems with smooth boundaries | The 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 systems | 2009-05 |
157 |
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Dawson, Kyle | Multi-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1 | The 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; Redshift | 2009-12 |
158 |
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Khan, Faisal Habib | Multiple-load-source integration in a multilevel modular capacitor-clamped DC-DC converter featuring fault tolerant capability | A 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 converter | 2009-01 |
159 |
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Dawson, Kyle | Multiwavelength observations of a rich galaxy cluster at z ~ 1: the HST/ACS colour-magnitude diagram | XMMU 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; Redshift | 2009-07 |
160 |
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Boehme, Christoph | Observation of precursor pair formation of recombining charge carriers | An 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 carriers | 2009-07 |
161 |
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Vardeny, Zeev Valentine | Optical probes of ∏-conjugated polymer blends with strong acceptor molecules | We 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 cells | 2009-05 |
162 |
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Balasubramonian, Rajeev | Optimizing communication and capacity in a 3D stacked reconfigurable cache hierarchy | Cache 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 reconfiguration | 2009-02 |
163 |
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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 |
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Gondolo, Paolo | Solar neutrino limit on axions and keV-mass bosons | The 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-mass | 2009-05 |
165 |
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Khan, Faisal Habib | Switching cells and their implications for power electronic circuits | This 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 |
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Vardeny, Zeev Valentine; Nahata, Ajay | Terahertz spectroscopy of plasmonic fractals | We 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 arrays | 2009-03 |
167 |
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Vardeny, Zeev Valentine | Ultrafast dynamics in metallic and semiconducting carbon nanotubes | Transient 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 |
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Lupton, John Mark | Unraveling the inhomogeneously broadened absorption spectrum of conjugated polymers by single-molecule light-harvesting action spectroscopy | The 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; Chromophores | 2009-10 |
169 |
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Couldwell, William T. | Unruptured posterior communicating artery aneurysm presenting with gustatory seizures and temporal lobe edema | Unruptured 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; PCOM | 2009-04 |
170 |
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Freire, Juliana; Silva, Claudio T. | VisMashup: streamlining the creation of custom visualization applications | Visualization 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; Medleys | 2009-11 |
171 |
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DeTar, Carleton | Visualization of semileptonic form factors from lattice QCD | Comparisons 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 decay | 2009-08 |
172 |
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Hansen, Charles D. | Volume Ray casting with peak finding and differential sampling | Direct 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 |
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Harrison, Reid R. | Wireless integrated circuit for 100-channel charge-balanced neural stimulation | The 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-power | 2009-12 |
174 |
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Harrison, Reid R. | Wireless neural recording with single low-power integrated circuit | We 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 |
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Mallat, Chibli | 'A conversation to be had' on war and law: Obama's Nobel speech | Even 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 |