gebhart/patrepeval huggingface dataset:
An adaptive traffic prediction algorithm for cellular radio systems (2002)

Prediction of customer demand is an important aspect of the design of any communication system. Accurate predictions enable the system operator to allocate resources efficiently such that the quality of service offered is maximised whilst the capital expenditure on infrastructure is minimised. Within the paper an automated technique for the prediction of customer demand, or system traffic, within a cellular radio system is presented. Within the technique a model for the traffic generation process is firstly assumed. The parameters of the model are then derived using an adaptive algorithm to minimise the error apparent between the prediction obtained from the model and actual traffic data available from the real system. Once the model parameters have been derived it is then possible to predict traffic in areas in which actual data is unavailable or in situations in which system parameters may be subject to alteration.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The fractionated dipole antenna: A new antenna for body imaging at 7 <scp>T</scp>esla (2015)

With the new design, good quality prostate images are acquired. SAR levels are reduced by 41% to 63% in comparison to the SSAD. Coupling levels are moderate (average nearest neighbor: -14.6 dB) for each subject and prostate B1+ levels range from 12 to 18 μT.
Turbo detection for MIMO systems: bit labeling and pre‐coding (2004)

Abstract Bit‐interleaved coded modulation with iterative detection for multi‐input multi‐output (MIMO) systems demands an efficient APP detector that delivers soft information about the coded bits. The list‐sequential detector is a reduced‐complexity approximation to an exhaustive a posteriori probability (APP) detector. It uses a tree search employing the stack algorithm to find dominant terms of the log‐likelihood ratio (LLR). The commonly used symbol‐by‐symbol Gray labeling is not necessarily the best approach to good performance of iterative systems. Therefore, we consider different bit labelings and differential pre‐coding adapted to MIMO systems. With the help of extrinsic information transfer (EXIT) charts and bit error rate (BER) simulations, we show that symbol‐by‐symbol Gray labeling in combination with an outer Turbo code is a good compromise for fast convergence and low error floor of MIMO systems with iterative detection. Copyright © 2004 AEI
A posteriori respiratory motion gating of dynamic PET images (2004)

The presence of patient physiological motion during imaging may cause significant artifacts in image quality. Proposed correction methodologies involve the use of gated acquisitions through simultaneous recording of an external signal. The purpose of our work is to determine the feasibility of post-acquisition synchronization of dynamically acquired PET images in the absence of any external signal. The principle of the technique is based on the assumption that although the amplitude of the motion may vary from pixel to pixel inside the same organ, the frequency of the periodic motion is the same. Under such conditions, the prerequisite for a posteriori gating is the ability to accurately estimate that frequency. We performed simulation studies using the NCAT phantom and a Monte Carlo simulation of the GE Advance PET system (3D mode of operation). A number of NCAT emission and the corresponding transmission frames were generated throughout a respiratory cycle. Time frames of 0.15, 0.45 and 0.62 seconds were simulated with variable count statistics (namely 30k, 70k and 120k of total simulated coincidences). Time activity curves were obtained, for each of the dynamic series formed, using different ROIs and Fourier transform was performed in order to estimate the frequency of the simulated motion. We were able to determine the frequency of motion (within 2% of the simulated frequency) for all three frame time durations evaluated. Using the estimated frequency we were able to calculate on a pixel by pixel basis the amplitude and the phase of the motion, allowing us to reconstruct an a posteriori gated time series.
Carbon monoxide and hypertension (2004)

The enzymatic action of heme oxygenase yields carbon monoxide, biliverdin and iron. Carbon monoxide is implicated in many physiological processes, including the regulation of vascular tissue contractility and apoptosis. By stimulating the soluble guanylyl cyclase (sGC)/cGMP pathway and activating K channels in vascular smooth muscle cells (SMCs), carbon monoxide relaxes vascular tissues under physiological conditions. Altered metabolism and functions of carbon monoxide have been linked to the pathogenesis and maintenance of hypertension. The expression and activity of heme oxygenase-1, sGC and cGMP in vascular SMCs are associated with different stages of development of hypertension in spontaneously hypertensive rats (SHRs). The importance of altered heme oxygenase-2 expression in vascular tissues in hypertension remains unclear. Increased vascular contractility, unbalanced cellular apoptosis and proliferation in the vascular wall, increased oxidative stress, and the altered interaction of carbon monoxide and nitric oxide are among the consequences of heme oxygenase/carbon monoxide system dysfunction in hypertension. Acute application of pharmacological inducers to upregulate the expression of heme oxygenase-1 or the use of gene delivery method to overexpress heme oxygenase-1 decreases blood pressure in young SHRs and other animal models of hypertension. These blood pressure-decreasing effects are annulled by metalloporphyrins. In adult SHRs, the heme oxygenase/carbon monoxide system appears to be normalized as a compensatory reaction. To date, acute manipulation of the expression of heme oxygenase-1 has not been successful in decreasing blood pressure in adult SHRs. In conclusion, abnormality of the heme oxygenase/carbon monoxide system has a critical role in the pathogenesis of hypertension, and novel therapeutic approaches should be pursued to achieve selective improvement in the function of this system in hypertension.
An Intelligent Parallel Loop Scheduling for Parallelizing Compilers. (2000)

In this paper we propose a knowledge-based approach to solving loop-scheduling problems. A rule-based system, called IPLS, is developed by combining a repertory grid and an attribute ordering table to construct a knowledge base. IPLS chooses an appropriate scheduling algorithm by inferring some features of loops and assigning parallel loops to multiprocessors to achieve significant speedup. Because more attributes are proposed, the accuracy of selection of an appropriate scheduling method is improved. In addition, the refined IPLS system can automatically adjust the attributes in the knowledge base according to profile information; therefore, IPLS has the capability of feedback learning. The experimental results show that our approach can achieve greater speedup on multiprocessor systems than can others.
ESQL: a query language for the relation model supporting image domains (2002)

It is shown that by simply extending the relational data model to support image domains, the model becomes rich enough for many advanced applications. Extensions to the relational algebra and the relational calculus are developed to exploit the semantics of image domains. The extended calculus is incorporated in the query language ESQL, which is a strict superset of the structured query language (SQL). A technique to implement ESQL using a preprocessor to SQL is shown. A noteworthy observation is that it is possible to incorporate multirelations without any modifications to the storage structures and data definition language of SQL. It is also possible to support queries of multirelations in ESQL without modifying the features of SQL in any way as far as traditional data manipulation is concerned.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
An Enzyme-Linked Immunosorbent Assay (ELISA) for the Measurement of Plasmin-α2-Antiplasmin Complex in Human Plasma - Application to the Detection of In Vivo Activation of the Fibrinolytic System (1986)

Summary An enzyme-linked immunosorbent assay (ELISA) is developed for the measurement of plasmin-α2-antiplasmin complex in human plasma. Microtiter plates were coated with a mixture of two murine monoclonal antibodies directed against human α2-antiplasmin and bound plasmin-α2-antiplasmin complex was quantitated with a peroxidase-conjugated monoclonal antibody directed against human plasminogen. The lower limit of sensitivity of the assay was 0.01 nM of plasmin-α2-antiplasmin complex in 100-fold diluted human plasma, allowing detection of 1 nM in undiluted plasma samples. After 100-fold dilution of the plasma samples, the assay was no longer influenced by the presence of the precursors plasminogen and α2-antiplasmin. At a concentration of 2.0 nM of plasmin-α2-antiplasmin complex in plasma, intra- and interassay variation coefficients were 4.2 and 5.5 percent respectively. In plasma samples of 25 control subjects the levels of plasmin-α2-antiplasmin complex were below 1 nM. Extensive in vivo activation of the fibrinolytic system during thrombolytic therapy with streptokinase resulted in the generation of elevated levels of plasmin-α2-antiplasrnin complex up to 690 ± 150 nM. No measurable levels of plasmin-α2-antiplasmin complex were found in the plasma of 32 patients with acute deep vein thrombosis nor in the plasma of 11 patients with recurrent deep vein thrombosis. These findings indicate that plasmin-α2-antiplasmin complex is generated during in vivo activation of the fibrinolytic system and that its assay may be useful to monitor thrombolytic therapy but not for the diagnosis of venous thrombosis.
Research on Cooperative Combat for Integrated Reconnaissance‐Attack‐BDA of Group LAVs (2014)

LAVs (loitering air vehicles) are advanced weapon systems that can loiter autonomously over a target area, detect and acquire the targets, and then attack them. In this paper, by the theory of Itô stochastic differential, a group system was analyzed. The uniqueness and continuity of the solution of the system was discussed. Afterwards the model of the system based on the state transition was established with the finite state machine automatically. At last, a search algorithm was proposed for obtaining good feasible solutions for problems. And simulation results show that model and method are effective for dealing with cooperative combat of group LAVs.
Neural Graph Matching for Modification Similarity Applied to Electronic Document Comparison (2022)

In this paper, we present a novel neural graph matching approach applied to document comparison. Document comparison is a common task in the legal and financial industries. In some cases, the most important differences may be the addition or omission of words, sentences, clauses, or paragraphs. However, it is a challenging task without recording or tracing whole edited process. Under many temporal uncertainties, we explore the potentiality of our approach to proximate the accurate comparison to make sure which element blocks have a relation of edition with others. In beginning, we apply a document layout analysis that combining traditional and modern technics to segment layout in blocks of various types appropriately. Then we transform this issue to a problem of layout graph matching with textual awareness. About graph matching, it is a long-studied problem with a broad range of applications. However, different from previous works focusing on visual images or structural layout, we also bring textual features into our model for adapting this domain. Specifically, based on the electronic document, we introduce an encoder to deal with the visual presentation decoding from PDF. Additionally, because the modifications can cause the inconsistency of document layout analysis between modified documents and the blocks can be merged and split, Sinkhorn divergence is adopted in our graph neural approach, which tries to overcome both these issues with many-to-many block matching. We demonstrate this on two categories of layouts, as follows., legal agreement and scientific articles, collected from our real-case datasets.
The Acoustic Analogy- A Powerful Tool in Aeroacoustics with Emphasis on Jet Noise Prediction (2004)

The acoustic analogy introduced by Lighthill to study jet noise is now over 50 years old. In the present paper, Lighthill s Acoustic Analogy is revisited together with a brief evaluation of the state-of-the-art of the subject and an exploration of the possibility of further improvements in jet noise prediction from analytical methods, computational fluid dynamics (CFD) predictions, and measurement techniques. Experimental Particle Image Velocimetry (PIV) data is used both to evaluate turbulent statistics from Reynolds-averaged Navier-Stokes (RANS) CFD and to propose correlation models for the Lighthill stress tensor. The NASA Langley Jet3D code is used to study the effect of these models on jet noise prediction. From the analytical investigation, a retarded time correction is shown that improves, by approximately 8 dB, the over-prediction of aft-arc jet noise by Jet3D. In experimental investigation, the PIV data agree well with the CFD mean flow predictions, with room for improvement in Reynolds stress predictions. Initial modifications, suggested by the PIV data, to the form of the Jet3D correlation model showed no noticeable improvements in jet noise prediction.
Preparation of amorphous silica particles and their thermal behavior (1976)

From Si(OC2H5)4-NH3-H2O-C2H5OH system, monodispersed suspensions of spherical silica particles of colloidal size were prepared by means of hydrolysis of tetraethyl silicate.Several attempts to produce silica spheres under the same experimental condition showed that a very narrow size distribution was always reproduced in each attempt, but it was not easy to obtain a constant median diameter.In general, larger particles were grown during aging at a lower temperature and at a higher ester concentration, but these factors had no influence on their standard deviations.An electron microscopic investigation of a series of samples were taken at different times from the same solution indicated that the spherical secondary particles were formed by coalescence of irregular shaped primary particles of a few hundreds Å diameter.X-ray diffraction pattern showed that the spherical particles were amorphous just like a silica gel, and no crystallization has been observed even if they were heated at 1000°C for 7 hr in air. Although differential thermal analysis curve of the particles was the same as those obtained from silica gel, there was a slight difference in an amount of weight loss during heating, which might be attributed to a different amount of physically absorbed water.
Novel synthesis of 8-Aza Steroids (1975)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel synthesis of 8-Aza SteroidsRobert E. Lyle and George A. HeavnerCite this: J. Org. Chem. 1975, 40, 1, 50–54Publication Date (Print):January 1, 1975Publication History Published online1 May 2002Published inissue 1 January 1975https://pubs.acs.org/doi/10.1021/jo00889a011https://doi.org/10.1021/jo00889a011research-articleACS PublicationsRequest reuse permissionsArticle Views99Altmetric-Citations8LEARN 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 optionsGet e-Alertsclose Get e-Alerts
2×N twin-field quantum key distribution network configuration based on polarization, wavelength, and time division multiplexing (2022)

Abstract Developing quantum key distribution (QKD) has been recently directed toward distance extension and network expansion for real-world secure communications. Considering a recent report on a quantum communication network over 4,600 km, it seems that QKD networks using conventional protocols have been sufficiently studied. However, although the twin-field QKD (TF-QKD) proposed for long-distance QKD has been studied deeply enough to succeed the demonstrations over 428- and 511-km deployed fibers, TF-QKD networks have been verified only for a ring network. In this work, we propose a star topological 2 × N TF-QKD network scheme, where the coherence maintenance issue, being the primary obstacle to implementing TF-QKD, can be minimized by the automatic mode-matching feature of the Sagnac-based plug-and-play architecture. A lower number of active controllers is required for our scheme in comparison with one-way TF-QKD networks. Moreover, our scheme adopts a cost-effective configuration that requires only a single pair of single-photon detectors for the entire network system. We conducted a proof-of-concept experiment over a 50-km fiber successfully, achieving an average secret key rate of 1.31 × 10 −4 bit per pulse (1.52 bit per second) with the finite-size effect.
Optical surface analysis: a new technique for the inspection and metrology of optoelectronic films and wafers (2003)

In response to demand for higher volumes and greater product capability, integrated optoelectronic device processing is rapidly increasing in complexity, benefiting from techniques developed for conventional silicon integrated circuit processing. The needs for high product yield and low manufacturing cost are also similar to the silicon wafer processing industry. This paper discusses the design and use of an automated inspection instrument called the Optical Surface Analyzer (OSA) to evaluate two critical production issues in optoelectronic device manufacturing: (1) film thickness uniformity, and (2) defectivity at various process steps. The OSA measurement instrument is better suited to photonics process development than most equipment developed for conventional silicon wafer processing in two important ways: it can handle both transparent and opaque substrates (unlike most inspection and metrology tools), and it is a full-wafer inspection method that captures defects and film variations over the entire substrate surface (unlike most film thickness measurement tools). Measurement examples will be provided in the paper for a variety of films and substrates used for optoelectronics manufacturing.
Characterization of AmphiF-spondin reveals the modular evolution of chordate F-spondin genes (1998)

The F-spondin genes are a family of extracellular matrix molecules united by two conserved domains, FS1 and FS2, at the amino terminus plus a variable number of thrombospondin repeats at the carboxy terminus. Currently, characterized members include a single gene in Drosophila and multiple genes in vertebrates. The vertebrate genes are expressed in the midline of the developing embryo, primarily in the floor plate of the neural tube. To investigate the evolution of chordate F-spondin genes, I have used the basal position in chordate phylogeny of the acraniate amphioxus. A single F-spondin-related gene, named AmphiF-spondin, was isolated from amphioxus. Based on molecular phylogenetics, AmphiF-spondin is closely related to a particular subgroup of vertebrate F-spondin genes that encode six thrombospondin repeats. However, unlike these genes, expression of AmphiF-spondin is not confined to the midline but is found through most of the central nervous system. Additionally, AmphiF-spondin has lost three thrombospondin repeats and gained two fibronectin type III repeats, one of which has strong identity to a fibronectin type III repeat from Deleted in Colorectal Cancer (DCC). Taken together, these results suggest a complex evolutionary history for chordate F-spondin genes that includes (1) domain loss, (2) domain gain by tandem duplication and divergence of existing domains, and (3) gain of heterologous domains by exon shuffling.
Electrochromic Enhancement of WO<sub>3</sub>-TiO<sub>2</sub>Composite Films Produced by Electrochemical Anodization (2014)

10.1149/2.0631414jes
UNDERSTANDING THE ROLES OF IS LEADERSHIP (2003)

This research study seeks to provide a more thorough understanding of the role of information systems (IS) leadership in both the public and private sector.Current studies focus mainly or exclusively on only one of these sectors.This study will use a grounded theory approach to identify similarities of and differences between IS leadership roles in each sector as they relate to mission, technology, and culture.The findings will contribute to a more insightful conceptualization and understanding of IS leadership.
Neurodevelopmental outcome following persistent pulmonary hypertension of the neonate. (1987)

The neurodevelopmental status of 12 children with persistent pulmonary hypertension of the newborn (PPHN) was examined. All had neonatal documentation of PPHN by echocardiogram, and all were ventilated at least 72 hours. The mean age at follow-up was 20 months (range, 12-28). Five of the 12 subjects were normal at follow-up, three were felt to be suspect but not clearly abnormal, and four had neurodevelopmental abnormalities, including three with sensorineural hearing impairment (25 per cent incidence in this study). These findings represent a concerning frequency of neurodevelopmental dysfunction and support early routine hearing evaluation in this unique subgroup of neonatal intensive care unit survivors.
Inhibition of 3 beta-hydroxysteroid-dehydrogenase: an approach for prostate cancer treatment? (1995)

Over 80% of clinically manifested prostate cancers respond to androgen withdrawal. Several alternatives to castration have been explored. Since a growth promoting role for androstenedione has been suggested, we investigated the effect of inhibition of 3 beta-hydroxy-steroid-dehydrogenase (3 beta-HSD), a key enzyme involved in the biosynthesis of practically all steroids. In a previous study a reduced proliferation rate of androgen responsive R3327-H tumor was demonstrated after in vivo treatment with 17 beta-N,N-diethylcarbamoyl-4-aza-5 alpha-androstan-3-one (4MA) - a putative 5 alpha-reductase inhibitor. In the present investigation 3 beta-HSD enzyme activity derived from human placenta, testis and ovarian cancer cell line and from rat testis was determined using radiolabeled dehydroepiandrosterone (DHEA) or pregnenolone. Among different synthetic compounds known to interfere with steroidogenesis, only 4MA was shown to potently inhibit in vitro 3 beta-HSD activity from all tissue sources. 4MA was administered to male Copenhagen rats bearing R3327-H androgen dependent prostate tumors and levels of different androgens in serum and prostate tumor were measured using reversed phase HPLC and radioimmunoassay. The decreased content of androstenedione in serum and tumor tissue with DHEA accumulation in prostate tumor tissue showed an effective 3 beta-HSD inhibition by 4MA occurring in vivo as well. These observations unequivocally demonstrate a 3 beta-HSD inhibiting effect of 4MA in vitro as well as in vivo and point to a role for androstenedione in the promotion of cell proliferation in androgen sensitive tumors. 3 beta-HSD dependent androstenedione production could thus constitute a proper target -eventually combined with other endocrine treatment - for the treatment of hormone dependent prostate cancer.