gebhart/patrepeval huggingface dataset:
Signature Optimization for CDMA With Limited Feedback (2005)

We study the performance of joint signature-receiver optimization for direct-sequence code-division multiple access (DS-CDMA) with limited feedback. The receiver for a particular user selects the signature from a signature codebook, and relays the corresponding B index bits to the transmitter over a noiseless channel. We study the performance of a random vector quantization (RVQ) scheme in which the codebook entries are independent and isotropically distributed. Assuming the interfering signatures are independent, and have independent and identically distributed (i.i.d.) elements, we evaluate the received signal-to-interference plus noise ratio (SINR) in the large system limit as the number of users, processing gain, and feedback bits B all tend to infinity with fixed ratios. This SINR is evaluated for both the matched filter and linear minimum mean-squared error (MMSE) receivers. Furthermore, we show that this large system SINR is the maximum that can be achieved over any sequence of codebooks. Numerical results show that with the MMSE receiver, one feedback bit per signature coefficient achieves close to single-user performance. We also consider a less complex and suboptimal reduced-rank signature optimization scheme in which the user's signature is constrained to lie in a lower dimensional subspace. The optimal subspace coefficients are scalar-quantized and relayed to the transmitter. The large system performance of the quantized reduced-rank scheme can be approximated, and numerical results show that it performs in the vicinity of the RVQ bound. Finally, we extend our analysis to the scenario in which a subset of users optimize their signatures in the presence of random interference.
Using open service access to enable mobile Internet applications in UMTS networks (2001)

Wireless network operators are faced with the significant challenge of rapidly designing and deploying innovative value added applications in a highly competitive environment. This paper explores the prospect for a wireless network operator to use the open service access (OSA) API to provide mobile Internet applications in a UMTS network. This prospect is based on the proposition that the core network capabilities exposed by the OSA API provide added value above and beyond any capability readily available to traditional fixed line Internet service providers. The example presented in the paper illustrates that opening up the network using the set of open, flexible and extensible OSA APIs will afford the network operator.
Photoconductivity of intrinsic graphene (2008)

We examine the photoconductivity of an intrinsic graphene associated with far- and midinfrared irradiation at low temperatures. The model under consideration accounts for the excitation of the electron-hole pairs by incident radiation, the interband generation-recombination transitions due to thermal radiation, and the intraband energy relaxation due to acoustic phonon scattering. The momentum relaxation is assumed to be caused by elastic scattering. The pertinent collision integrals are adapted for the case of the massless energy spectrum of carriers that interact with the longitudinal acoustic mode and the thermal radiation. It is found that the photoconductivity is determined by interplay between weak energy relaxation and generation-recombination processes. Due to this, the threshold of nonlinear response is fairly low.
Changes of portal flow in heart failure patients with liver congestion. (2010)

The flow pulsatility increases with increasing right ventricular filling pressure so that an analysis of the PV flow can detect the elevation of right atrial pressure and allow a quantitative estimation of RAP. The finding of flat portal vein flow wave patterns in HF patients with signs of congestion draws the attention to concurrent primary liver disease. This information could be important in the risk stratification as well as in the therapeutic decision (Tab. 1, Fig. 6, Ref. 19).
Mechanism of Gelation of Gelatin. Influence of Certain Electrolytes on the Melting Points of Gels of Gelatin and Chemically Modified Gelatins. (1956)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Gelation of Gelatin. Influence of Certain Electrolytes on the Melting Points of Gels of Gelatin and Chemically Modified Gelatins.Jake Bello, Helene C. A. Riese, and Jerome R. VinogradCite this: J. Phys. Chem. 1956, 60, 9, 1299–1306Publication Date (Print):September 1, 1956Publication History Published online1 May 2002Published inissue 1 September 1956https://pubs.acs.org/doi/10.1021/j150543a035https://doi.org/10.1021/j150543a035research-articleACS PublicationsRequest reuse permissionsArticle Views1117Altmetric-Citations76LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
Efficient Scheduling of FPGAs for Cloud Data Center Infrastructures (2020)

In modern cloud data centers, reconfigurable devices can be directly connected to the network of a data center. This configuration enables FPGAs to be rented for acceleration of data-intensive workloads. In this context, novel scheduling solutions are needed to maximize the utilization (profitability) of FPGAs, e.g., reduce latency and resource fragmentation. Algorithms that schedule groups of tasks (clusters, packs), rather than individual tasks (list scheduling), well match the functioning of FPGAs. Here, groups of tasks that execute together are interposed by hardware reconfigurations. In this paper, we propose a heuristic based on a novel method for grouping tasks. These are gathered around a high-latency task that hides the latency of remaining tasks within the same group. We evaluated our solution on a benchmark of almost 30000 random workloads, synthesized from realistic designs (i.e., topology, resource occupancy). For this testbench, on average, our heuristic produces optimum makespan solutions in 71.3% of the cases. It produces solutions for moderately constrained systems (i.e., the deadline falls within 10% of the optimum makespan) in 88.1% of the cases.
SOIL TESTS TO DETERMINE APPLICATION RATES FOR POLYMERIC SOIL CONDITIONERS (1986)

We have developed five different soil tests that can be used in the laboratory (two of them can also be used in the field) to determine possible rates for field application of polymeric soil conditioners to achieve desirable physical properties of soil. These tests are (1) determining rates of polymers to achieve flocculation of soils in test tubes, (2) filtering and air-dying the aggregates from the test tubes to evaluate water stability, (3) testing a range of concentrations of polymers to determine the rate that preserves existing soil aggregates, (4) treating small samples of soil with polymers, followed by curing, for water penetration tests, and (5) wet-sieving control soils and soils treated with polymers while in suspension. All tests relate to application of polymers in irrigation water, which procedure increases the efficiency severalfold due to improved spatial relationships in soil.
Relationship between Amplitude and Timing of Heart Sounds and Endocardial Acceleration (2009)

A close correlation was observed between PEA I and S1 amplitudes and timings, and between PEA II and S2 timings. These observations support the hypothesis that PEA and heart sounds are manifestations of the same phenomena. EA might be a useful tool to monitor cardiac function.
High Power Laser Application in Openhole Multiple Fracturing with an Overview of Laser Research; Past, Present and Future (2012)

Abstract High power laser research has been advancing in targeting several areas for downhole applications such as perforation, clay treatment and wellbore flow enhancement among others. This paper presents an overview of the laser research in well stimulation; past, current and future applications. The focus will be on the use of laser to support fracturing of horizontal wells by creating a vertical notch to help initiate the fracture in the point of interest along the horizontal section. Hydraulic fracturing is the process used by the petroleum industry to enhance productivity from low producing wells. Unconventional reservoirs such as tight sands and shale are associated with productivity challenges due to extremely low formation permeability. The process entails high pressure injection of fluids, mostly water based, in the stimulated well such that the pressure applied on the well sand face exceeds the formation fracturing gradient. Although the process of hydraulic fracturing is mostly used to enhance productivity, there are other applications of this process such as sand production control and bypassing of formation damage caused by drilling fluid. The outcome of hydraulic fracturing is a maximized surface area that connects the reservoir to the producing well. This process also leads to activation of natural fractures thus making the stimulated reservoir volume at its maximum value.
The End of Education: "The Harvard Core Curriculum Report" and the Pedagogy of Reformation (1982)

Education may well be, as of right, the instrument whereby every individual, in a society like ours, can gain access to any kind of discourse. But we well know that in its distribution, in what it permits and in what it prevents, it allows the well-trodden battlelines of social conflict. Every educational system is a political means of maintaining or of modifying the appropriation of discourse, with the knowledge and power it carries with it.
Synthesis and anticonvulsant activity of 1‐benzyl‐4‐alkylamino‐1<i>H</i>‐imidazo[4,5‐<i>c</i>]pyridines (1988)

Abstract Four 3‐deaza analogues of the potent anticonvulsant purine, BW A78U, were synthesized and tested for anticonvulsant activity. The imidazo[4,5‐c]pyridines 9–12 were prepared in two steps from 4‐chloro‐1 H ‐imidazo[4,5‐ c ]pyridine ( 2 ). The compounds were potent anticonvulsant agents against maximal electroshock‐induced seizures in rats with i.p. ED 50 ranging from 2 to 3.5 mg/kg. However, these 3‐deazapurines were appreciably more toxic than BW A78U, which precluded their development as potential antiepileptic agents.
A cross-device interaction style for mobiles and surfaces (2012)

Natural forms of interaction have evolved for personal devices that we carry with us (mobiles) as well as for shared interactive displays around us (surfaces) but interaction across the two remains cumbersome in practice. We propose a novel cross-device interaction style for mobiles and surfaces that uses the mobile for tangible input on the surface in a stylus-like fashion. Building on the direct manipulation that we can perform on either device, it facilitates fluid and seamless interaction spanning across device boundaries. We provide a characterization of the combined interaction style in terms of input, output, and contextual attributes, and demonstrate its versatility by implementation of a range of novel interaction techniques for mobile devices on interactive surfaces.
The tumour metabolism inhibitors GSAO and PENAO react with cysteines 57 and 257 of mitochondrial adenine nucleotide translocase (2012)

The sulphur atoms of these two cysteines are 20 Å apart in the crystal structures of ANT and the optimal spacing of cysteine thiolates for reaction with As (III) is 3-4 Å. This implies that a significant conformational change in ANT is required for the organoarsenicals to react with cysteines 57 and 257. This conformational change may relate to the selectivity of the compounds for proliferating cells.
Multi-Sensor Data Integration for Autonomous Sense and Avoid (2011)

To operate Unmanned Aerial Systems (UAS) freely in the National Airspace System (NAS), an on-board sense-and-avoid (SAA) capability equivalent to or better than manned aircraft will be required. Under U.S. Air Force Research Laboratory (AFRL) sponsorship, Northrop Grumman Corporation (NGC) has been developing a scalable autonomous SAA system using a comprehensive sensor suite comprising Traffic Alert and Collision Avoidance System (TCAS) and Automatic Dependent Surveillance Broadcast (ADS-B) for detecting cooperative intruders as well as radar and electro-optical (EO) sensors for detecting noncooperative intruders. This paper focuses on the sensor data integration (SDI) portion of the autonomous SAA system in the areas of design objective, architectural and algorithmic approach, and flight test results.
Cost-effective sol-gel synthesis of porous CuO nanoparticle aggregates with tunable specific surface area (2019)

CuO nanoparticles (NPs) are applied in various key technologies, such as catalysis, energy conversion, printable electronics and nanojoining. In this study, an economic, green and easy-scalable sol-gel synthesis method was adopted to produce submicron-sized nanoporous CuO NP aggregates with a specific surface area > 18 m²/g. To this end, a copper-carbonate containing precursor was precipitated from a mixed solution of copper acetate and ammonia carbonate and subsequently calcinated at T ≥ 250 °C. The thus obtained CuO nanopowder is composed of weakly-bounded agglomerates, which are constituted of aggregated CuO NPs with a tunable size in the range of 100-140 nm. The CuO aggregates, in turn, are composed of equi-axed primary crystallites with a tunable crystallite size in the range of 20-40 nm. The size and shape of the primary CuO crystallites, as well as the nanoporosity of their fused CuO aggregates, can be tuned by controlled variation of the degree of supersaturation of the solution via the pH and the carbonate concentration. The synthesized submicron-sized CuO aggregates can be more easily and safely processed in the form of a solution, dispersion or paste than individual NPs, while still offering the same enhanced reactivity due to their nanoporous architecture.
[Metabolism of serotonin in autism in children]. (1989)

In this controlled study of 22 autistic children and 22 normal controls matched for age and sex, the frequency of hyperserotonemia in infantile autism was confirmed. Platelet serotonin was elevated in patients. Comparative to controls, serotonin was also high in urine of autistic patients, while, on the contrary there was no difference for the urinary excretion of 5-HIAA. No difference was observed either for serotonin uptake and efflux or for MAO activity, in isolated platelets. The elevation of plasma free tryptophan - significant only with the Kolmogorov Smirnov test - suggests that 5-HT biosynthesis might be enhanced. In the group of patient reported in this study, disorders of serotonin metabolism are associated with disturbances of platelet catecholamines, and also with elevated immunoglobulins and enhanced cellular immunity reactions.
Determination of extractable biocides in paper food packaging materials using micellar electrokinetic chromatography (1998)

Capillary electrophoresis methodology has successfully been developed for the determination of six biocide substances in aqueous media following extraction from food contact paper and board. The procedure developed is rapid and simple and uses nontoxic reagents. Limits of detection were found to range between 125 and 1275 mg/kg paper, equating to 0.02–0.29 mg/dm2 surface area. Recoveries ranged between 53 and 114%. The methodology is capable of determining biocide concentrations at or below current legislative limits. © 1998 John Wiley & Sons, Inc. J Micro Sep 10: 387–391, 1998
DVI: A Standard for the Digital Monitor Interface (1999)

Abstract The use of digital interfaces for monitors, in particular LCD displays, has expanded tremendously in the past year. While the progress has been dramatic, it has been restrained by the perception that there are competing standards. This paper describes the work of the Digital Display Working Group, DDWG, comprised of major companies in the display and systems industries. The output of the DDWG is a new specification, the Digital Visual Interface, or DVI. This paper describes the structure and scope of this standard, contrasts it with existing digital standards, and it will highlight some of its salient technical points.
A note on stable perturbations of Moore–Penrose inverses (2011)

SUMMARY Perturbation bounds for Moore–Penrose inverses of rectangular matrices play a significant role in the perturbation analysis for linear least squares problems. In this note, we derive a sharp upper bound for Moore–Penrose inverses, which is better than a well known existing one. Copyright © 2011 John Wiley & Sons, Ltd.
A Functional Proteomic Strategy to Discover Inhibitors for Uncharacterized Hydrolases (2007)

Hydrolytic enzymes constitute one of the largest and most diverse protein classes in Nature and play key roles in nearly all physiological and pathological processes. The mammalian serine hydrolase superfamily contains a remarkable number of uncharacterized members, with at least 40−50% of these enzymes lacking experimentally verified endogenous substrates and products. Assignment of metabolic and cellular functions to these enzymes requires the development of pharmacological tools to selectively perturb their activity. We describe herein a functional proteomic strategy to systematically develop potent and selective inhibitors for uncharacterized serine hydrolases and its application to the brain-enriched enzyme α/β-hydrolase-6. We anticipate that the methods described herein will facilitate the development of selective chemical probes to annotate the metabolic and (patho)physiological functions of many of the uncharacterized serine hydrolases that currently populate eukaryotic and prokaryotic proteomes.
Participation of octopaminergic reward system and dopaminergic punishment system in insect olfactory learning revealed by pharmacological study (2005)

Biogenic amines play major roles in the regulation of behavior in vertebrates and invertebrates. Previous studies in honey bees and fruit-flies Drosophila suggested that octopamine (OA, invertebrate counterpart of noradrenaline) and dopamine (DA) participate in appetitive olfactory conditioning with sucrose reward and aversive olfactory conditioning with electric shock punishment, respectively. In order to determine whether the effects of the two chatecholamines on electric shock and sugar learning can be generalized to other kinds of appetitive and aversive reinforcers, we studied the effects of OA and DA receptor antagonists on appetitive olfactory learning with water reward, and aversive olfactory learning with saline punishment in the cricket Gryllus bimaculatus. Crickets injected with epinastine or mianserin, OA receptor antagonists, into the hemolymph exhibited an impairment of appetitive learning with water reward, while aversive learning with saline punishment remained intact. In contrast, fluphenazine, chlorpromazine or spiperone, DA receptor antagonists, impaired aversive learning without affecting appetitive learning. This finding, combined with findings in previous studies, suggests that the octopaminergic reward system and dopaminergic punishment system participate in insect olfactory learning with various appetitive and aversive reinforcements.
On the parameter choice for the Non-Local Means (2014)

Abstract. This paper deals with the parameter choice for the NL-Means algorithm. Starting with basic computations on toy models, we study the bias-variance trade-off of this filter using a simple notion of regularity in the patch space. We show that this regularity is necessarily local and so should be the parameters of the filter. Relying on Stein’s Unbiased Risk Estimate, we then propose a way to locally set these parameters, and we compare this method with the Non-Local Means with optimal global parameter. hal-00468856, version 1- 31 Mar 2010
Community Smart Grid Utilizing Dynamic Demand Response and Tidal Power for Grid Stabilization (2013)

Conventional electricity generation is one of the largest contributors to climate change. Renewable energy sources are a promising part of the solution but uncertainty combined with a lack of controllability prevents renewable sources of power from being direct substitutes of conventional energy sources. This shift towards a higher penetration of renewable energy into the electric grid can be realized with the implementation of a more sophisticated smart grid, which uses dynamic demand response to alter demand on following generation. Research on renewable energy penetration of the grid predominately focuses on wind and solar power resources but demand cannot always match availability from these sources and therefore greatly increases the need for energy storage. Tidal power differs from solar and wind. It’s a predictably renewable resource which makes it extremely valuable even on a relatively small scale. Introduction of tidal power in a high penetration micro-grid can serve to stabilize the grid and reduce the amount of storage required. Widely different time scale for wind, solar and tidal power availability results in low cross correlations and therefore increases stability. This research describes an incremental approach to migrating a grid-tie island towards the formation of a smart-micro grid. The system will include a high penetration of three distributed generation systems, wind, solar and tidal and utilize commercially available energy storage and a smart-home management controller. Dynamic demand response through load balancing is implemented to minimize interactions with the electric grid. A second component of this work is to determine the optimum tidal generation capacity for the micro grid such that needed storage capacity from batteries or the utility grid is minimized.
A comparison of five algorithms for tracking frequency and frequency rate-of-change (2002)

An experimental investigation of five simple algorithms for tracking frequency and frequency rate-of-change is reported. The algorithms were developed in an evolutionary fashion from an alpha beta tracker. Two of the algorithms consist of alpha beta trackers followed by low-order, finite-impulse-response differentiators for frequency-rate estimation. The final two algorithms under consideration represent an attempt to incorporate the finite-impulse-response differentiators within a recursive tracking loop. The cascade connection of a low-order differentiator with an alpha beta tracker offers significant advantages in frequency-rate estimation, while the incorporation of these differentiators in the loop offers further benefits. The various algorithms are compared on the basis of the variance of the frequency and frequency-rate estimates, as well as the delay introduced in obtaining the derivative estimates.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>