gebhart/patrepeval huggingface dataset:
Bandwidth-enhanced volume grating for dense wavelength-division multiplexer using a phase-compensation scheme (2005)

A phase-compensation scheme is proposed and demonstrated to overcome the intrinsic tradeoff between the dispersion and the bandwidth of a volume grating. Its application to a volume grating-based dense wavelength-division multiplexing (DWDM) device is explored. A DWDM device is fabricated by using a 45°/82° configuration. To achieve phase compensation of the Bragg condition, a wavelength-dependent incident angle for a dispersion-enhanced holographic grating at 82° is generated through a prestaged volume hologram at 45°. The 3dB dispersion bandwidth is increased five times by using such a device configuration. A 21-channel DWDM device centered at 1555nm with 200GHz spacing is demonstrated within its 3dB bandwidth.
Holmium Laser Applications in Endourology (2002)

No AccessJournal of UrologyUROLOGICAL SURVEY: Video Reviews: BPH, DIVERSION, KIDNEY/URETER, STONE DISEASE, URETHRA: VIDEO REVIEWS1 Jan 2002Holmium Laser Applications in Endourology Thomas W. Jarrett and M.D. Ralph V. ClaymanM.D. Thomas W. JarrettThomas W. Jarrett More articles by this author and Ralph V. ClaymanRalph V. Clayman More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(05)65487-0AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail "Holmium Laser Applications in Endourology." The Journal of Urology, 167(1), p. 438 © 2002 by American Urological Association, Inc.FiguresReferencesRelatedDetails Volume 167Issue 1January 2002Page: 438 Advertisement Copyright & Permissions© 2002 by American Urological Association, Inc.MetricsAuthor Information Thomas W. Jarrett More articles by this author Ralph V. Clayman More articles by this author Expand All Advertisement PDF downloadLoading ...
Large-Scale Flexible Storage with SAN Technology Phil Andrews, Tom Sherwin, and Bryan Banister (2001)

The San Diego Supercomputer Center is installing a large (64-port) Fibre Channel Storage Area Network to form both an integral part of, and an alternative architecture to its existing traditional HSM system. Connected to the SAN will be a significant number (>10) Sun servers, a large amount of high-speed native FC disk (>7TB), high-end FC tape capability in the form of IBM 3590E and STK 9840 FC drives, and an IBM SP running the HPSS software. A portion of the FC disk will be cache disk for the High Performance Storage System andsome of the tape drives will also be utilized by HPSS. However, we will also be working with direct backups from the FC disk to the FC tape drives, administered by commercial file system packages such as Veritas and Legato. The initial configuration of the SAN will be as a FC arbitrated loop, but this will quickly become a full switch fabric. We will be experimenting with several transfer options within this configuration: 1) Direct HPSS transfers between cache disk and tape storage. 2) Transfers between FC disk and FC tape drives mediated by third-party software. 3) Transfers between HPSS FC disk cache and non-HPSS FC disk and tape storage. 4) Transfers to and from the outside world via Gigabit Ethernet connections. We will present transfer rates and other data on the success, or otherwise, of these operations. Much of the data stored in this system will be accessible via the Web and several largescale, high availability Web Servers will be running on the directly connected equipment. We will be attempting to establish this configuration as a workable model for making Petabyte-sized databases available for Web access in support of national-scale scientific experiments. In this respect we will provide latency and transfer rate results for Web access to the data. The SDSC already supports the world's largest HPSS archive (>200TB) and numerous servers including the Protein Data Bank national resource.
Supplementary Data from <i>MLL</i>-Rearranged B Lymphoblastic Leukemias Selectively Express the Immunoregulatory Carbohydrate-Binding Protein Galectin-1 (2023)

Supplementary Data from &lt;i&gt;MLL&lt;/i&gt;-Rearranged B Lymphoblastic Leukemias Selectively Express the Immunoregulatory Carbohydrate-Binding Protein Galectin-1
Identification of peripheral neural circuits that regulate heart rate using optogenetic and viral vector strategies (2019)

Heart rate is under the precise control of the autonomic nervous system. However, the wiring of peripheral neural circuits that regulate heart rate is poorly understood. Here, we develop a clearing-imaging-analysis pipeline to visualize innervation of intact hearts in 3D and employed a multi-technique approach to map parasympathetic and sympathetic neural circuits that control heart rate in mice. We identify cholinergic neurons and noradrenergic neurons in an intrinsic cardiac ganglion and the stellate ganglia, respectively, that project to the sinoatrial node. We also report that the heart rate response to optogenetic versus electrical stimulation of the vagus nerve displays different temporal characteristics and that vagal afferents enhance parasympathetic and reduce sympathetic tone to the heart via central mechanisms. Our findings provide new insights into neural regulation of heart rate, and our methodology to study cardiac circuits can be readily used to interrogate neural control of other visceral organs.
A Guide to Choosing Vectors for Transformation of the Plastid Genome of Higher Plants (2007)

Plastid transformation, originally developed in tobacco (Nicotiana tabacum), has recently been extended to a number of crop species enabling in vivo probing of plastid function and biotechnological applications. In this article we report new plastid vectors that enable insertion of transgenes in the inverted repeat region of the plastome between the trnV and 3'rps12 or trnI and trnA genes. Efficient recovery of transplastomic clones is ensured by selection for spectinomycin (aadA) or kanamycin (neo) resistance genes. Expression of marker genes can be verified using commercial antibodies that detect the accumulation of neomycin phosphotranseferase II, the neo gene product, or the C-terminal c-myc tag of aminoglycoside-3''-adenylytransferase, encoded by the aadA gene. Aminoglycoside-3''-adenylytransferase, the spectinomycin inactivating enzyme, is translationally fused with green fluorescent protein in two vectors so that transplastomic clones can be selected by spectinomycin resistance and visually identified by fluorescence in ultraviolet light. The marker genes in the new vectors are flanked by target sites for Cre or Int, the P1 and phiC31 phage site-specific recombinases. When uniform transformation of all plastid genomes is obtained, the marker genes can be excised by Cre or Int expressed from a nuclear gene. Choice of expression signals for the gene of interest, complications caused by the presence of plastid DNA sequences recognized by Cre, and loss of transgenes by homologous recombination via duplicated sequences are also discussed to facilitate a rational choice from among the existing vectors and to aid with new target-specific vector designs.
Optimization of Electromagnetic Coupling to Ceramic Resonators for Magnetic Resonance Imaging Applications (2013)

Research into the properties of dielectric resonators can provide insight to potential applications in magnetic resonance imaging (MRI) technology as replacements for the radiofrequency (RF) coils used in current designs. Increasing the strength of the external magnetic field offers several advantages, including improved signal-to-noise ratio (SNR) and spectral resolution. However, this increase in field strength may require an alternative coil design as traditional RF coils have numerous difficulties at higher frequencies such as low quality factor. A potential solution may be to replace these coils with dielectric resonators. The objective of this research project is aimed at gathering information pertinent to dielectric resonators with various boundary conditions. Specifically, probe design and alternative coupling methods were investigated using network analyzers to provide insight into methods that could increase power supplied to the resonator, allowing it to generate strong RF magnetic fields within MRI equipment. By implementing a full loop probe design around the ceramic resonator, the effective power transmission was increased by 70.6% to −9.60 dB in the experimental design and by 75.7% to −15.6 dB when it was used in the MRI probe. However, this strong increase in signal transmission, made possible through the replacement of the original 12 mm diameter coil, had unintentional consequences in that the resonant frequency could be tuned to a minimum of 605 MHz instead of the ideal 600 MHz. In order to correct for this, a thin plate of CaTiO3 was added to the side of the existing resonator disk to achieve a lower resonant frequency.
Functional Organic Materials Based on Polymerized Liquid‐Crystal Monomers: Supramolecular Hydrogen‐Bonded Systems (2012)

Functional organic materials are of great interest for a variety of applications. To obtain precise functional properties, well-defined hierarchically ordered supramolecular materials are crucial. The self-assembly of liquid crystals has proven to be an extremely useful tool in the development of well-defined nanostructured materials. We have chosen the illustrative example of photopolymerizable hydrogen-bonding mesogens to show that a wide variety of functional materials can be made from a relatively simple set of building blocks. Upon mixing these compounds with other reactive mesogens, nematic, chiral nematic, and smectic or columnar liquid-crystalline phases can be formed that can be applied as actuators, sensors and responsive reflectors, and nanoporous membranes, respectively.
Transient Vapor Compression Refrigeration Cycle for Electronics Cooling: Part 2—Multi-Evaporator Dynamics and Control (2011)

For next-generation sustainable electronic systems, such as high-concentration photovoltaics arrays and high-density super-computers, two-phase cooling technologies are being explored to significantly reduce heat resistance from electronics’ surface to the ambient. Lower electronics operating temperatures lead to higher energy conversion or computation efficiency; therefore, thermal management, especially dynamic thermal management, is able to bring great potential to energy-efficient electronic system operation. These large-scale electronics cooling systems normally include multiple, distributed, and transient heat sources. Multi-evaporator vapor compression refrigeration cycle provides such a promising cooling solution. Due to the complexity of multiple evaporator structure, its transient analysis and active control become very challenging. This paper applies our previous distributed heat exchanger modeling techniques to study the dynamics of multi-evaporator refrigeration cycles. A comprehensive first-principle multi-evaporator vapor compression cycle model is formulated for its transient analysis. Some preliminary expansion valve control results are presented to show the excellent active electronics cooling capability. This general tool is expected to bring instructive guidelines for the optimal design and operation of energy-efficient transient electronics cooling systems with multiple heat loads and hot spots.
Minor Steroidal Alkaloids from the Marine Sponge Corticium sp. (2002)

Four new steroidal alkaloids, plakinamine G (1), plakinamine H (2), 4alpha-hydroxydemethylplakinamine B (3), and tetrahydroplakinamine A (4), along with three known compounds, were isolated from the marine sponge Corticium sp. The structures of these metabolites were elucidated largely by 1D and 2D NMR methods and accurate mass measurements (HR-EIMS). Compounds 1, 2, and 4 show significant in vitro cytotoxicity.
Compact Modeling of Multi-Gate MOSFETs for High-Power Applications (2020)

A compact multi-gate MOSFET model is developed for high-voltage applications. The model includes the short-channel effects specific for thin-film MOSFETs with highly resistive drain contact. The short-channel effects are drastically reduced by the drain-resistance effect, which is consistently modeled by considering the whole potential distribution along the device. The overlap length is an important device parameter, which influences on the device characteristics for high-voltage MOSFETs in general. Modeling of the related effects is realized self-consistently for the reported compact high-voltage multi-gate MOSFET model, based on the applied complete potential-distribution description. In particular, the modeling requirements for capturing the specific features of the capacitance response are explored in detail. It is further demonstrated that the developed model is applicable even for limiting the device-size requirements during the development of a multi-gate MOSFET generation.
Combined aberration-corrected STEM and synchrotron nano-diffraction for crystal phase engineering in GaAs nanowires (2022)

International audience
Managing Risks of IT Outsourcing (2011)

Outsourcing is one of the most talked about and widely debated topics. Over the past few years, firms have been outsourcing their IT operations at increasing rates. The fact that firms are turning to outside vendors in increasing numbers in order to meet their needs does not mean that outsourcing is without problems. Firms often enter outsourcing deals without considering risks or assuming that all risks lay with the external service provider. In this chapter, we provide an overview of IT outsourcing, its risks, and a model for managing those risks. We identify different firm-vendor configurations for sustaining long-term relationships aimed at diversifying risk over time and discuss the need for psychological contracts to manage such outsourcing relationships.Request access from your librarian to read this chapter's full text.
Fifteen Streptococcus suis serotypes identified by multiplex PCR (2012)

A multiplex PCR was developed to detect 15 serotypes of Streptococcus suis. This multiplex PCR was separated into two reaction sets. The first set identified nine serotypes (serotypes 1/2, 1, 2, 3, 4, 7, 9, 14 and 16) and the second set identified six serotypes (serotypes 5, 8, 10, 19, 23 and 25). This assay correctly detected serotypes 2, 5 and 14 in human isolates, and serotypes 1, 2, 1/2, 3, 4, 5, 7, 9, 14, 16 and 19 in pig isolates from Thailand. No cross-reaction was observed with other streptococcal species. This assay may be useful for the serotype surveillance of human and pig isolates of S. suis.
Internal distribution of micro-/nano-sized ceramics and metals particles in mice (2010)

Internal distribution of several nanoparticles in mice has been investigated using scanning X-ray analytical microscopy, magnetic resonance imaging and inductively coupled plasmaatomic emission spectroscopy. According dynamic laser scattering analysis, the actual particle size of obtained metal oxide was similar to that of metal particles. The estimated diameters were ca. one micrometer. After administration through the tail vein of the mice, metal particles quickly reached some organs. The distribution ratio reached a constant value and was then maintained. On the other hand, the metal oxide particles were first localized in the spleen and lung. The concentration in the lung was decreased with post-injection time. This result suggested that the particles were temporally trapped in the lung then removed to other organs. The behaviors between metal and metal oxide were quite different even when those particles had a similar actual particle size. Therefore, the distribution behavior of particles depended on the chemical species.
The Effects of Physiological and Methodological Determinants on 18F-FDG Mouse Brain Imaging Exemplified in a Double Transgenic Alzheimer Model (2016)

Corrections for blood glucose levels have to be applied when semiquantifying (18)F-FDG brain uptake in mouse models for AD. Potential reference regions for normalization should be thoroughly investigated to ensure that they are not pathologically affected also by afferent connections.
Downlink Capacity of Interference-Limited MIMO Systems (2002)

In a paper by Dai and Molisch (see Proc. IEEE VTC 2002 Spring, Birmingham, AL, May 2002), space-time layered architectures (BLAST) and turbo coding/processing techniques, which are effective for single-link transmission, are combined with multiuser detection (MUD) methods for combating intercell interference. It is shown that, depending on the channel configuration, linear MMSE or successive interference cancellation (SIC) can be the preferable MUD method. Based on this fact, an adaptive scheme is developed. T/sup h/e downlink capacity of interference-limited multiple-input multiple-output (MIMO) cellular systems is investigated. It is found that the obtained MUD capacity is excellent in high to medium SIR scenario, but still deteriorates in strong interference environments, leaving ample room for possible improvement through other techniques. The performance of the proposed adaptive MUD scheme in a standard cellular environment, both in the non-line-of-sight (NLOS) and the line-of-sight (LOS) case, is simulated, and the advantages over the standard V-BLAST scheme are quantified. (Less)
Manifestation of quantum chaos in electronic band structures (1994)

We use semiconductors as an example to show that quantum chaos manifests itself in the energy spectrum of crystals. We analyze the ab initio band structure of silicon and the tight-binding spectrum of the alloy ${\mathrm{Al}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$As and show that some of their statistical properties obey the universal predictions of quantum chaos derived from the theory of random matrices. Also, the Bloch momenta are interpreted as external, tunable, parameters, acting on the reduced (unit cell) Hamiltonian, in close analogy to Aharonov-Bohm fluxes threading a torus. They are used in the investigation of the parametric autocorrelator of crystal velocities. We find that our results are in good agreement with the universal curves recently proposed by Simons and co-workers.
Toward Microwave-to-Optical Conversion using Erbium Doped Crystals and Integrated Resonators (2019)

We present progress towards a bidirectional coherent microwave-to-optical photon converter using an ensemble of rare-earth ions coupled to integrated photonic and microwave resonators.
Monolithic erbium- and ytterbium-doped microring lasers on silicon chips (2014)

We demonstrate monolithic 160-µm-diameter rare-earth-doped microring lasers using silicon-compatible methods. Pump light injection and laser output coupling are achieved via an integrated silicon nitride waveguide. We measure internal quality factors of up to 3.8 × 105 at 980 nm and 5.7 × 105 at 1550 nm in undoped microrings. In erbium- and ytterbium-doped microrings we observe single-mode 1.5-µm and 1.0-µm laser emission with slope efficiencies of 0.3 and 8.4%, respectively. Their small footprints, tens of microwatts output powers and sub-milliwatt thresholds introduce such rare-earth-doped microlasers as scalable light sources for silicon-based microphotonic devices and systems.
Prevalence and risk factors for peripheral artery disease in an Asian population with diabetes mellitus (2009)

We describe the prevalence and risk factors for PAD in Asian Malays with diabetes. A population-based study of 3,280 (78.7% response) Malay persons aged 40-80 years in Singapore was conducted. ABI was measured in all participants with a history of diabetes (N=634). PAD was defined to be present if ABI <or= 0.9. All participants had standardised interviews, clinical examinations and laboratory investigation for risk factor assessment. The crude prevalence of PAD was 10.4% (95% CI: 8.3%-13.0%). After age standardisation to the 2000 Singapore Census population, the prevalence was 5% (95% CI: 3.8-8.6). In multivariate analyses, the presence of PAD was associated with older age (OR 1.05; 95% CI: 1.01-1.09, per year increase), female gender (OR 4.18; 95% CI: 1.67-10.43), cigarette smoking (OR 2.55; 95% CI: 1.05-6.20), higher systolic blood pressure (OR 1.28; 95% CI: 1.13-1.45), a history of myocardial infarction (OR 3.69; 95% CI: 1.79-7.61) and stroke (OR 3.06 95% CI: 1.25-7.50). In this Asian Malay population with diabetes, we found a high prevalence of PAD.The major risk factors for PAD among persons with diabetes are similar to studies in Caucasian populations, suggesting that strategies aimed at controlling the modifiable factors may reduce the prevalence of PAD in Asian populations.
Role of Acid Sites on .GAMMA.-Al2O3 Based Catalyst for CF4 Hydrolysis (2011)

PFC（perfluorocompounds）は，CF4，C2F6およびSF6などの総称であり，CO2に比べて6,500から23,900倍の温暖化係数を有する強力な地球温暖化ガスである．PFCを触媒で高効率に分解するには，触媒表面へのPFC吸着を促進させることが重要である．触媒の酸点量増加に着目して，γ-Al2O3にいくつかの金属酸化物を添加した．触媒探索の結果，ZnO/Al2O3はCF4を923 Kで99%以上分解することを見出した．触媒の詳細分析の結果，973 KまでNH3を吸着保持する強酸点の量とCF4分解率との間に良好な相関があることがわかった．
Frontispiece: Potential‐Resolved Electrogenerated Chemiluminescence for the Selective Detection of Multiple Luminophores (2015)

The frontispiece shows a representative graph of a mixed electrogenerated chemiluminescence system, resolved by both the potential applied to initiate the reactions and the distinct spectral distribution of the three emitters. The Review by Paul S. Francis et al. on page 456, outlines recent innovation in the area of potential-resolved ECL, which can be exploited to selectively elicit light from multiple excited states within a single chemical species, multiple emitters sharing a common co-reactant, or distinct ECL systems within the same solution.
Information gathering control via exploratory path planning (2012)

We tackle the problem of exploring an unknown environment using a range sensor, where most of the uncertainty is due to the presence of opaque objects of unknown and arbitrary geometry, topology and configuration. Information-gathering control aims to minimize the residual uncertainty, resulting in an optimal control problem that is essentially intractable. We propose a surrogate measure of uncertainty that is efficient to compute and results in guaranteed performance bounds. The resulting algorithm is proven to complete exploration within a prescribed accuracy in a finite number of steps, depending in the complexity of the environment.
Vehicle Yaw Stability Control by Coordinated Active Front Steering and Differential Braking in the Tire Sideslip Angles Domain (2012)

Vehicle active safety receives ever increasing attention in the attempt to achieve zero accidents on the road. In this paper, we investigate a control architecture that has the potential of improving yaw stability control by achieving faster convergence and reduced impact on the longitudinal dynamics. We consider a system where active front steering and differential braking are available and propose a model predictive control (MPC) strategy to coordinate the actuators. We formulate the vehicle dynamics with respect to the tire slip angles and use a piecewise affine (PWA) approximation of the tire force characteristics. The resulting PWA system is used as prediction model in a hybrid MPC strategy. After assessing the benefits of the proposed approach, we synthesize the controller by using a switched MPC strategy, where the tire conditions (linear/saturated) are assumed not to change during the prediction horizon. The assessment of the controller computational load and memory requirements indicates that it is capable of real-time execution in automotive-grade electronic control units. Experimental tests in different maneuvers executed on low-friction surfaces demonstrate the high performance of the controller.