gebhart/patrepeval huggingface dataset:
Dealing with Overload in Distributed Stream Processing Systems (2006)

Overload management has been an important problem for large-scale dynamic systems. In this paper, we study this problem in the context of our Borealis distributed stream processing system. We show that server nodes must coordinate in their load shedding decisions to achieve global control on output quality. We describe a distributed load shedding approach which provides this coordination by upstream metadata aggregation and propagation. Metadata enables an upstream node to make fast local load shedding decisions which will influence its descendant nodes in the best possible way.
Magneto-optical properties and the potential application of GaAs with magnetic MnAs nanoclusters (2000)

The giant magneto-optical effect of ferromagnetic MnAs nanoclusters embedded in GaAs is shown. The Faraday rotation angle at 0.98 μm reaches about 0.2°/μm at 2000 Oe. The potential of this magneto-optical material for use as a Faraday rotator operating at 0.98 μm is demonstrated by the Verdet constant of the film which is 16 times larger than that of (Cd,Mn,Hg)Te commercially developed for an optical isolator. The fabrication of this material is compatible with that of semiconductor-based devices.
QUANTITATIVE ASPECTS OF PECTIC ACID HYDROLYSIS BY ENDO‐POLYGALACTURONASE FROM Rhizopus Arrhizus (1980)

ABSTRACT The mechanism of hydrolysis of various pectic substrates by highly purified endo‐polygalacturonase from Rhizopus arrhizus (RAPG) was investigated. RAPG hydrolyzed pectic acids through a random attack mechanism. Under controlled conditions, after hydrolysis of the pectic acid (DP = 134) by RAPG for 48 hr at 30°C, the major end products were monogalacturonic acid (6.5%), dimer (18.0%), trimer (55.0%), tetramer (6.6%), pentamer (5.1%), hexamer (3.0%), and small amounts of other oligomers. RAPG reacted more quickly on pectic acids of intermediate molecular weight (DP = 24), and favored pectic acid rather than pectinic acid and pectins.
Efficient higher-Stokes-order Raman conversion in molecular gases: errata (1980)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text H. Komine and E. A. Stappaerts, "Efficient higher-Stokes-order Raman conversion in molecular gases: errata," Opt. Lett. 5, 78-78 (1980) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
NITRATE REDUCTASE (NR1) SEQUENCE AND EXPRESSION IN THE HARMFUL ALGA HETEROSIGMA AKASHIWO (RAPHIDOPHYCEAE)1 (2009)

Heterosigma akashiwo (Hada) Hada ex Y. Hara et Chihara is a bloom-forming alga that has been associated with fish kills in coastal regions worldwide. Dense blooms of this species occur annually in Delaware’s inland bays, USA. Under static laboratory conditions, however, H. akashiwo is a poor competitor compared to other algal species. Instead, Heterosigma may proliferate under dynamic conditions due to its ability to respond quickly to nutrient input. The objectives of this investigation were to examine changes in transcriptional expression of nitrate reductase (NR) as a proxy for nitrate assimilation in Heterosigma. Here, the gene sequence for H. akashiwo nitrate reductase (NR1) was amplified by PCR, and the full-length gene sequence was obtained and characterized. Using quantitative reverse transcriptase real-time PCR (QRT-PCR), changes in NR1 expression were evaluated in relation to temperature and nitrogen status. Expression of NR1 was not significantly different for cultures acclimated to temperatures ranging from 18°C to 28°C. Results also demonstrated that NR1 was expressed constitutively, even in the absence of nitrate and in the presence of ammonium. An apparent biphasic expression of NR1 was observed upon addition of nitrate to N-starved cultures, with significant increases at 15 and 60 min after addition. In contrast, addition of nitrate to nitrate-replete cultures resulted in a significant decrease in NR1 transcript abundance, likely due to repression by downstream products of nitrate assimilation. These results suggest that Heterosigma responds rapidly to changes in the environment by up- or down-regulating the NR transcript pool in relation to the nitrogen status of the cell.
Cell Culture Isolation of Piscine Neuropathy Nodavirus from Juvenile Sea Bass, Dicentrarchus labrax (1996)

A virus causing a vacuolating encephalopathy and retinopathy in juvenile sea bass, Dicentrarchus labrax, was isolated from brain tissue in a fish cell line (SSN-1) derived from striped snakehead, Channa striatus. The isometric, non-enveloped, 30 nm diameter virus particles were resistant to pH 2-9 and heating at 56 degrees C for 30 min. Infectious particles had a buoyant density of approximately 1.31 g/cm3 in CsCl. Two structural polypeptides of molecular mass 40 and 42 kDa were identified and the ssRNA consisted of two fragments of molecular mass 1.10 and 0.51 x 10(6) Da. From these characteristics the virus was identified as a nodavirus. Due to the broad range of susceptible fish hosts and the consistent neuropathology of the disease condition, the generic term piscine neuropathy nodavirus (PNN) is proposed for this infectious agent.
Hybrid nanoporous silicon optical biosensor architectures for biological sample analysis (2010)

This work focuses on demonstrating proof-of-concept for a novel nanoparticle optical signal amplification scheme employing hybrid porous silicon (PSi) sensors. We are investigating the development of target responsive hydrogels integrated with PSi optical transducers. These hybrid-PSi sensors can be designed to provide a tunable material response to target concentration ranging from swelling to complete chain dissolution. The corresponding refractive index changes are significant and readily detected by the PSi transducer. However, to increase signal to noise, lower the limit of detection, and provide a visual read out capability, we are investigating the incorporation of high refractive index nanoparticles (NP) into the hydrogel for optical signal amplification. These NPs can be nonspecifically encapsulated, or functionalized with bioactive ligands to bind polymer chains or participate in cross linking. In this work, we demonstrate encapsulation of high refractive index QD nanoparticles into a 5wt% polyacrylamide hydrogel crosslinked with N,N'-methylenebisacrylamide (BIS) and N,N Bis-acryloyl cystamine (BAC). A QD loading (~0.29 wt%) produced a 2X larger optical shift compared to the control. Dissolution of disulphide crosslinks, using Tris[2-carboxyethyl] phosphine (TCEP) reducing agent, induced gel swelling and efficient QD release. We believe this hybrid sensor concept constitutes a versatile technology platform capable of detecting a wide range of bio/chemical targets provided target analogs can be linked to the polymer backbone and crosslinks can be achieved with target responsive multivalent receptors, such a antibodies. The optical signal amplification scheme will enable a lower limit of detection sensitivity not yet demonstrated with PSi technology and colorimetric readout visible to the naked eye.
Oxidation of heme c derivatives by purified heme oxygenase. Evidence for the presence of one molecular species of heme oxygenase in the rat liver. (1982)

ducible by metal ions (Cdz+, Sn", Hg", and Ni2+) in the liver and the kidney of treated rats.
One-cycle controlled three-phase electronic load (2012)

This study is concerned with application of the universal one-cycle control (OCC) technique to implement a three-phase AC electronic load. The proposed AC electronic load is able to emulate complex load behaviour. The study describes the principles of operation and the digital implementation of AC electronics load. To validate the approach, the start-up transient of an induction motor was successfully emulated. Both the simulation and experimental results are reported.
Scalable Concurrency Control and Recovery for Shared Storage Arrays (CMU-CS-99-111) (2018)

Shared storage arrays enable thousands of storage devices to be shared and directly accessed by end hosts over switched system-area networks, promising databases and filesystems highly scalable, reliable storage. In such systems, however, concurrent host I/Os can span multiple shared devices and access overlapping ranges potentially leading to inconsistencies for redundancy codes and for data read by end hosts. In order to enable existing applications to run unmodified and simplify the development of future ones, we desire a shared storage array to provide the illusion of a single controller without the scalability bottleneck and single point of failure of an actual single controller. In this paper, we show how rapidly increasing storage device intelligence coupled with storage’s special characteristics can be successfully exploited to arrive at a high performance solution to this storage management problem. In particular, we examine four concurrency control schemes and specialize them to shared storage arrays; two centralized ones: simple server locking, and server locking with leased callbacks; and two distributed ones based on device participation: distributed locking using storage-device-embedded lock servers and timestamp ordering using loosely synchronized clocks. Simulation results show that both centralized locking schemes suffer from scalability limitations. Moreover, callback locking is particularly suspect if applications do not have much inherent locality and if the storage system introduces false sharing. Distributed concurrency control with device support is attractive as it scales control capacity with storage and performance capacity and offers the opportunity to piggyback lock/ordering messages on operation requests, eliminating message latency costs. Simulations show that both storage-optimized device-based protocols exhibit close to ideal scaling achieving 90-95% of the throughput possible under totally unprotected operation. Furthermore, timestamp ordering uses less network resources, is free from deadlocks and has performance advantages under high load. We show how timestamp ordering can be extended with careful operation history recording to ensure efficient failure recovery without inducing I/Os under normal operation. This brings the overhead of concurrency control and recovery to a negligible few percent thereby realizing the scalability potential of the shared array I/O architecture.
A novel stereoscopic image processing pipeline (2013)

This paper presents a novel stereoscopic image processing pipeline which ensures the consistency of a stereoscopic image pair. Although a stereoscopic image calibration method should resolve both photometric and geometric binocular asymmetries, most previous approaches [1], [2] have mainly focused on the geometric calibration so far. In contrast to this biased research, we propose both photometric and geometric calibration methods which are readily applicable to an embedded pipeline for a stereoscopic camera system. The experimental results demonstrate the performance of the proposed pipeline for calibrating a stereoscopic image pair.
Pushing the Limits of Indoor Localization in Today’s Wi-Fi Networks (2015)

Wireless networks are ubiquitous nowadays and play an increasingly important role in our everyday lives. Many emerging applications including augmented reality, indoor navigation and human tracking, rely heavily on Wi-Fi, thus requiring an even more sophisticated network. One key component for the success of these applications is accurate localization. While we have GPS in the outdoor environment, indoor localization at a sub-meter granularity remains challenging due to a number of factors, including the presence of strong wireless multipath reflections indoors and the burden of deploying and maintaining any additional location service infrastructure. On the other hand, Wi-Fi technology has developed significantly in the last 15 years evolving from 802.11b/a/g to the latest 802.11n and 802.11ac standards. Single user multiple-input, multiple-output (SU-MIMO) technology has been adopted in 802.11n while multi-user MIMO is introduced in 802.11ac to increase throughput. In Wi-Fi’s development, one interesting trend is the increasing number of antennas attached to a single access point (AP). Another trend is the presence of frequency-agile radios and larger bandwidths in the latest 802.11n/ac standards. These opportunities can be leveraged to increase the accuracy of indoor wireless localization significantly in the two systems proposed in this thesis: ArrayTrack employs multi-antenna APs for angle-of-arrival (AoA) information to localize clients accurately indoors. It is the first indoor Wi-Fi localization system able to achieve below half meter median accuracy. Innovative multipath identification scheme is proposed to handle the challenging multipath issue in indoor environment. ArrayTrack is robust in term of signal to noise ratio, collision and device orientation. ArrayTrack does not require any offline training and the computational load is small, making it a great candidate for real-time location services. With six 8-antenna APs, ArrayTrack is able to achieve a median error of 23 cm indoors in the presence of strong multipath reflections in a typical office environment. ToneTrack is a fine-grained indoor localization system employing time difference of arrival scheme (TDoA). ToneTrack uses a novel channel combination algorithm to increase effective bandwidth without increasing the radio’s sampling rate, for higher resolution time of arrival (ToA) information. A new spectrum identification scheme is proposed to retrieve useful information from a ToA profile even when the overall profile is mostly inaccurate. The triangle inequality property is then applied to detect and discard the APs whose direct path is 100% blocked. With a combination of only three 20 MHz channels in the 2.4 GHz band, ToneTrack is able to achieve below one meter median error, outperforming the traditional super-resolution ToA schemes significantly.
β-Ketoacyl Acyl Carrier Protein Synthase III (FabH) Is Essential for Fatty Acid Biosynthesis in <i>Streptomyces coelicolor</i> A3(2) (2001)

The Streptomyces coelicolor fab (fatty acid biosynthesis) gene cluster (fabD-fabH-acpP-fabF) is cotranscribed to produce a leaderless mRNA transcript. One of these genes, fabH, encodes a ketoacyl synthase III that is essential to and is proposed to be responsible for initiation of fatty acid biosynthesis in S. coelicolor.
Steady-State Response of Periodically Switched Linear Circuits via Augmented Time-Invariant Nodal Analysis (2014)

We focus on the simulation of periodically switched linear circuits. The basic notation and theoretical framework are presented, with emphasis on the differences between the linear time-invariant and the time-varying cases. For this important class of circuits and sources defined by periodic signals, the computation of their steady-state response is carried out via the solution of an augmented time-invariant MNA equation in the frequency-domain. The proposed method is based on the expansion of the unknown voltages and currents in terms of Fourier series and on the automatic generation of augmented equivalents of the circuit components. The above equivalents along with the information on circuit topology allow creating, via circuit inspection, a time-invariant MNA equation, the solution of which provides the coefficients of both the time- and the frequency-domain responses of the circuit. Analytical and numerical examples are used to stress the generality and benefits of the proposed approach.
Segregation of Cu to grain boundaries by aging treatment and its effect on EM resistance for AlCu/TiN lines (1994)

The electromigration (EM) resistance of AlCu(0.5 wt.%) multilayered lines improved by a factor of 10 after a low-temperature annealing at 250/spl deg/C for 10 hrs. The authors use the term "aging treatment" in this paper to describe such low-temperature annealing. Redistribution of Cu atoms after aging treatment was observed using TEM and energy dispersive X-ray spectroscopy (EDX). In addition to CuAl2 precipitates, segregated Cu, which was invisible by standard TEM imaging, was detected at grain boundaries after the aging treatment. However, aging treatments that were too long decreased both the EM lifetime and the segregated invisible Cu. The same temporal variation of EM lifetime and segregated Cu implies that the microstructure in which grain boundaries were coated with diffused Cu atoms during the aging treatment is that which improves EM resistance.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Particle-size and velocity measurements in flowing conditions using dynamic light scattering (2006)

The noninvasive optical technique of dynamic light scattering (DLS) is routinely used to characterize dilute and transparent submicrometer particle dispersions in laboratory environments. A variety of industrial and biological applications would, however, greatly benefit from on-line monitoring of dispersions under flowing conditions. We present a model experiment to study flowing dispersions of polystyrene latex particles of varying sizes under varying flow conditions by using a newly developed fiber-optic DLS probe. A modified correlation function proposed in an earlier study is applied to the analysis of extracting the size and velocity of laminar flowing particulate dispersions. The complementary technique of laser Doppler velocimetry is also used to measure the speed of moving particles to confirm the DLS findings.
From Wiener to hidden Markov models (1999)

The authors investigate common properties of 3 types of filters obtained by considering various stochastic models; Wiener filters, Kalman filters and hidden Markov model (HMM) filters. Unifying features which particularly stand out are the forgetting of old data and of initial conditions, and protection from round-off error effects' overpowering the calculations. They differentiate the concept of fixed-lag smoothing from filtering, and expose the comparative advantages and disadvantages. Once again, there are common properties which allow a unified viewpoint. We focus especially on characterizations of a maximally effective smoothing lag, and identification of the SNR circumstances under which smoothing is especially beneficial. The motivation is the processing of data from an array of acoustic sensors towed by a submarine.
Fast and Efficient Method for Block Edge Classification and Its Application in H.264/AVC Video Coding (2008)

Edge is an important feature in video classification which finds applications in video representation and coding. In H.264/AVC, intra-prediction mode decision (a computationally intensive process) is based on the orientation of the edges in the macroblock. In this paper, we first investigate the difference properties derived from three coefficients in the non-normalized Haar transform (NHT) domain and present a fast and efficient method to classify block edge using these properties. The proposed method significantly reduces the number of computational operations in the edge models determination with no multiplications and less addition operations. The use of edge classification for fast intra-prediction mode decision in H.264/AVC video coding is then presented. The experimental results show the effectiveness of the proposed method.
La patente europea con efecto unitario, bendecida por el Tribunal de Justicia: reflexión sobre alguna de las consecuencias para el Derecho de la UE de las Sentencias de 5 de mayo de 2015 (C-146/13 y C-147/13) (2015)

No han sorprendido a nadie las conclusiones de las sentencias del Tribunal de Justicia respecto a las demandas de nulidad presentadas por Espana contra los Reglamentos 1257/2012 y 1260/2012. Lo que resulta excepcional es la mas que dudosa calidad de los razonamientos que conducen al Tribunal a tales conclusiones y, sobre todo, la ingente cantidad de cuestiones de caracter general sobre el Derecho de la UE que suscita su lectura.
TOPICAL HYALURONIC ACID IN THE MANAGEMENT OF ORAL ULCERS (2011)

Hyaluronic acid is a hygroscopic macromolecule formed by the polymerisation of glucuronic acid and N-acetylglucosamine disaccharide. It is a primary component of the extracellular matrix in various body tissues. Ihe use of topical Hyaluronic acid in the treatment of oral ulcers has been recently reported. This article reviews the mechanism of action, indications and efficacy of topical Hyaluronic acid gel in the management of oral ulcers.
Transactifying Applications Using an Open Compiler Framework (2007)

Transactional memory dramatically reduces the complexity of writing concurrent code. Yet, seamless integration of transactional constructs in application code typically comes with a significant performance penalty. Recent studies have shown that compiler support allows producing highly efficient STM-based applications without putting the hassle on the programmer. So far, STM integration has been partially implemented in custom, proprietary compiler infrastructures. In this paper, we propose and evaluate the use of the LLVM open compiler framework to generate efficient concurrent applications using word-based STM libraries. Since LLVM uses the GCC compiler suite as front-end, it can process code written in C or C++ (with partial support for other languages). We also present a tool that allows ``transactifying'' assembly code and can complement LLVM for legacy code and libraries. Experiments using a lightweight C word-based STM library show that LLVM integration performs as well as hand-optimized calls to the STM library and better than assembly code instrumentation of the application code.
Position of tianeptine among antidepressive chemotherapies. (1988)

The advent of a new antidepressant is always received with both interest and scepticism by clinicians. No new compound has yet been shown to be more efficient than imipramine in the treatment of depression. In determining the position of a compound among the antidepressants, four levels are to be considered: (a) Chemical family: Tianeptine is a tricyclic compound of dibenzothiazepine type. It is the only representative of this subgroup. (b) Biochemical activities: Tianeptine increases the presynaptic uptake of serotonin after single as well as repeated administration; but this action is not linked to any effect on the 5-HT post-synaptic systems. Electrophysiological modifications are observed in the locus coeruleus (noradrenergic) at 2.5 times higher doses; nevertheless, the essential action involves the serotoninergic systems. Tianeptine has no affinity for alpha 1 adrenergic and H1 antihistaminic receptors; this affinity is responsible in a large part for the sedative anxiolytic properties of antidepressants. Tianeptine has no affinity for the muscarinic receptors. It has secured its place among the non-anticholinergic antidepressants. The mechanism of action or the therapeutic profile cannot be inferred from this original biochemical profile. (c) In clinical trials, the double-blind trials confirm the antidepressant efficacy in essentially neurotic depressive syndromes, similar to that of imipramine, nomifensine, amitriptyline. They do not show a shorter onset time of antidepressant activity. The therapeutic profile appears to be neither stimulating nor sedative. Some arguments are in favor of an anxiolytic activity. Others favor a more psychotonic profile. Tianeptine can be classified among the mid-position antidepressants. (d) With respect to clinical acceptability, tianeptine has no anticholinergic effect and no cardiovascular effect.