gebhart/patrepeval huggingface dataset:
Analysis and Design of a New Extendable SEPIC Converter with High Voltage Gain and Reduced Components for Photovoltaic Applications (2019)

This paper presents a high step-up DC-DC converter which is appropriate for Photovoltaic systems. This topology has been combined from an extended switched-capacitor and a common SEPIC converter. Low components and high-voltage-gain are the main benefits of the introduced topology. Low rate current ripple, easy control and continuous input current are other advantages of the presented structure. Integrating the switched-capacitor with the SEPIC converter leads to increase the output voltage with variable conversion ratio which can be used for a wide range of loads. The switched-capacitor converter provides a constant dc output voltage while the SEPIC converter extracts maximum power of PV panels because it operates under control of duty cycle. Continuous input current is highly suitable for PV applications. The operating principles and steady-state analysis of the suggested topology are discussed in detail. In order to assess the effectiveness of the presented topology, it has been simulated on PSCAD/EMTDC software.
K-2302 Processing of TiNi-SMA Fiber-Reinforced AZ31Mg A110 Matrix Composite by Pulsed Current Hot Pressing (PCHP) (2001)

Titanium-nickel shape memory alloy (SMA) fiber reinforced AZ31 magnesium alloy matrix composite was fabricated by Pulsed Current Hot Pressing (PCHP) process of Mg alloy plates with 20 vol. % of the TiNi SMA fiber, and its microstructure and mechanical properties were examined. The Mg alloy plates with the TiNi fiber was readily consolidated into composite at a load of 32MPa, at a heating ratio of 1.7ks, at a holding temperature of 773k and for a holding time of 300s. Interfacial reaction occurred insubstantially at the boundary between Mg alloy matrix and TiNi fiber and the homogeneous interface was not formed. The tensile yield stresses of the composite deformed in tension at 373K and at 423K were higher by about 68MPa and 87MPa than that at 293K.
Investigating the effects of VSC harmonic content on PD diagnostics for HVDC insulation systems (2015)

This paper reports on experimental investigations in which both HVDC and HVAC voltages were applied to solid dielectric insulation samples containing known defects. The insulation samples were subjected to HVAC and HVDC containing superimposed harmonic ‘ripple’, similar to that produced by the converter switching operation. Of particular interest were the effects of the applied voltage on partial discharge (PD) amplitude, repetition rate and pulse-spacing, which showed a correlation with harmonic amplitude and phase position. Under HVAC, the phase of the power frequency cycle is the dominant driver of PD activity and forms the basis of most diagnostic techniques for PD. However, under HVDC, PD activity can be influenced by comparatively minor features of the applied voltage. Established knowledge rules for defect identification based on repetitive PD characteristics at HVAC are therefore unlikely to be applicable directly to HVDC systems. Given the rapidly expanding HVDC infrastructure, accruing new knowledge rules through laboratory tests and online measurement trials will be essential in assisting network operators to identify incipient defects with a greater degree of confidence on these systems in the future
Leaded-Gasoline Additives Still Contaminate Groundwater (2005)

ADVERTISEMENT RETURN TO ISSUEPREVFeatureNEXTLeaded-Gasoline Additives Still Contaminate GroundwaterRonald W. Falta, Nimeesha Bulsara, James K. Henderson, and Richard A. MayerCite this: Environ. Sci. Technol. 2005, 39, 18, 378A–384APublication Date (Web):September 15, 2005Publication History Published online15 September 2005Published inissue 1 September 2005https://pubs.acs.org/doi/10.1021/es053352khttps://doi.org/10.1021/es053352knewsACS Publications. This publication is available under these Terms of Use. Request reuse permissions This publication is free to access through this site. Learn MoreArticle Views3311Altmetric-Citations32LEARN 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 PDF (785 KB) Get e-Alertsclose SUBJECTS:Additives,Groundwaters Get e-Alerts
Experiments with security and privacy in IoT networks (2015)

We explore the risks to security and privacy in IoT networks by setting up an inexpensive home automation network and performing a set of experiments intended to study attacks and defenses. We focus on privacy preservation in home automation networks but our insights can extend to other IoT applications. Privacy preservation is fundamental to achieving the promise of IoT, Industrial Internet and M2M. We look at both simple cryptographic techniques and information manipulation to protect a user against an adversary inside the IoT network or an adversary that has compromised remote servers. We show how user data can be masked or selectively leaked and manipulated. We provide a blueprint for inexpensive study of IoT security and privacy using COTS products and services.
Criterion of ion separation by reverse osmosis (1975)

Abstract The order of ion separation by the NS‐100 membrane differed slightly from that of the cellulose acetate membrane. The separation of an ion by the NS‐100 membrane increased with increase in the valence of the ion, but decreased with the increase in the ionic radius. The sole criterion determining this separation order for the NS‐100 membrane was the enthalpy of hydration. An ion having a higher enthalpy of hydration is bulkier in the hydrated form and is, therefore, separated more effectively by the NS‐100 membrane, according to the diffusional model of solute separation. The permeability of an ion through the membrane material can be related to its enthalpy of hydration. By using this relationship, the separation of individual ions in aqueous solution with a given NS‐100 membrane can be predicted from a test with a sodium chloride solution.
Preparation of slightly crosslinked monodisperse poly（maleic anhydride-cyclohexyl vinyl ether-divinylbenzene） functional microspheres with anhydride groups via precipitation polymerization (2015)

Slightly crosslinked monodisperse poly（maleic anhydride-cyclohexyl vinyl ether-divinylbenzene）（MA-CHVE-DVB） microspheres were prepared via precipitation polymerization while using 2,2-azobisisobutyronitrile as an initiator in a mixture of methyl ethyl ketone and n-heptane without any stabilizer.The number-average diameter of the resultant poly（MA-CHVE-DVB） microspheres ranged from 0.478 to 1.386 μm with a polydispersity index of 1.00 to 1.02 that depended on the feed ratios of the MA/CHVE/DVB monomers.The introduction of one electron donor monomer cyclohexyl vinyl ether strongly affected the yield,size,and morphology of these slightly crosslinked microspheres.Quinolinetype chelating resins were obtained after combining the poly（MA-CHVE-DVB） with 8-hydroxyquinoline;the adsorption properties of these materials were measured through their ability to remove Cu2+ ions from water.The poly（MA-CHVE-DVB） microspheres with low degrees of crosslinldng provided more effective functional groups and therefore better ion removal capabilities.These slightly crosslinked microspheres may have applications in water treatment as well as in sensing and drug delivery.
Biologic effects of various doses of ethinyl estradiol in postmenopausal women. (1982)

To determine which dosage of estrogen might provide physiologic replacement while minimizing adverse effects, 20 postmenopausal women were studied before and after oral administration of ethinyl estradiol. Twenty premenopausal women studied in the early and late follicular phases of the menstrual cycle were presumed to reflect normal physiologic function. Variable responses of the different biochemical and biologic markers to the actions of ethinyl estradiol were observed. Liver protein synthesis was the most sensitive measure of the action of ethinyl estradiol. In comparing the relative potencies of ethinyl estradiol with previously reported results observed with the usage of conjugated equine estrogens, the actions of 10 micrograms ethinyl estradiol were approximately equivalent to the biologic effects of 1.25 mg conjugated estrogens. The results suggest that ethinyl estradiol is far more potent than previously believed and that the daily administration of 10 micrograms, a dose lower than currently available commercial preparations, may be adequate for relief of symptoms of vaginal atrophy and may provide protection from the occurrence of osteoporotic fractures.
A WordNet-based natural language interface to relational databases (2010)

This paper proposes an approach to creating an WordNet-based natural language interface to relational databases which allows end-users to access and query information in database with a natural language. In order to strengthen the reliability and the user-friendliness of the system, our approach integrates WordNet as the base lexicon and ontology as the knowledge base of the semantic interpreter. The user inputs will be first translated into syntax tree by syntax analysis, then it will be translated into an intermediate representation language DRS by the ontology-based semantic interpreter. The SQL generator transfers DRS expressions into SQL sentences by a template technique. The RDMS executes SQL sentences and returns the final result. This paper presents the framework based on ontology techniques to implement a portable NLIDBs that makes it easier to migrate from one domain to another. The prototype system and our experiments show that our approach has generated good results with excellent performance on common queries.
Genetic analysis of an elite super-hybrid rice parent using high-density SNP markers (2013)

High-throughout sequencing technology makes it convenient to study rice genomics and makes the QTL/gene mapping direct, efficient, and more reliable. The genetic regions discovered in this study will be valuable for breeding in rice varieties because of the diverse genetic backgrounds of the rice.
Proposal and Evaluation of Data-Model Translation for Server-Virtualization Environment to Improve Virtual-Network Configuration Management (2016)

To reduce the operational load of virtual-network operation in data centers that contain server virtualization platforms and network switches provided by multiple vendors, it would become the challenge to ease management of configurations which are different among server-virtualization environments. This paper proposes a new data-model translation method to unify data-model among multiple configurations of server-virtualization platforms. As the result of evaluation with 24 virtual machines, data-model translation overhead was less than 10% of the time to acquire virtual-machine configuration, and the network management system took 80.5 s to generate configuration information for the overall system. These results indicate that the proposed method is effective to improve the efficiency of configuration management of virtual networks.
Photochemical Creation of Fluorescent Quantum Defects in Semiconducting Carbon Nanotube Hosts (2017)

Abstract Quantum defects are an emerging class of synthetic single‐photon emitters that hold vast potential for near‐infrared imaging, chemical sensing, materials engineering, and quantum information processing. Herein, we show that it is possible to optically direct the synthetic creation of molecularly tunable fluorescent quantum defects in semiconducting single‐walled carbon nanotube hosts through photochemical reactions. By exciting the host semiconductor with light that resonates with its electronic transition, we find that halide‐containing aryl groups can covalently bond to the sp 2 carbon lattice. The introduced quantum defects generate bright photoluminescence that allows tracking of the reaction progress in situ. We show that the reaction is independent of temperature but correlates strongly with the photon energy used to drive the reaction, suggesting a photochemical mechanism rather than photothermal effects. This type of photochemical reactions opens the possibility to control the synthesis of fluorescent quantum defects using light and may enable lithographic patterning of quantum emitters with electronic and molecular precision.
Effective clustering of complex objects in object-oriented databases (1991)

article Effective clustering of complex objects in object-oriented databases Share on Authors: Jia-Bing R. Cheng Department of Electrical and Computer Engineering, The Pennsylvania State University, University Park, PA Department of Electrical and Computer Engineering, The Pennsylvania State University, University Park, PAView Profile , A. R. Hurson Department of Electrical and Computer Engineering, The Pennsylvania State University, University Park, PA Department of Electrical and Computer Engineering, The Pennsylvania State University, University Park, PAView Profile Authors Info & Claims ACM SIGMOD RecordVolume 20Issue 2June 1991 pp 22–31https://doi.org/10.1145/119995.115793Published:01 April 1991 50citation525DownloadsMetricsTotal Citations50Total Downloads525Last 12 Months7Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Approximating lapped transforms through unitary postprocessing (2001)

We deal with the approximation of a nonsquare lapped transform matrix by another matrix. This second matrix is constrained to be the product of two stages: one lapped transform and a unitary postprocessing step, in such a way that approximation is accomplished by modifying the postprocessing stage alone. Viewing both matrices as transforms, the goal is to minimize the variance of the output error (discrepancy) for given input signal statistics. An extension of the result to frequency responses of filter bank transfer matrices is also given along with an example to demonstrate the feasibility of the method. The example demonstrates the potential use of the method in modifying transforms which can be applied in audio compression.
Measurement and modeling of microlenses fabricated on single-photon avalanche diode arrays for fill factor recovery (2014)

Single-photon avalanche diode (SPAD) imagers typically have a relatively low fill factor, i.e. a low proportion of the pixel's surface is light sensitive, due to in-pixel circuitry. We present a microlens array fabricated on a 128×128 single-photon avalanche diode (SPAD) imager to enhance its sensitivity. The benefits and limitations of these light concentrators are studied for low light imaging applications. We present a new simulation software that can be used to simulate microlenses' performance under different conditions and a new non-destructive contact-less method to estimate the height of the microlenses. Results of experiments and simulations are in good agreement, indicating that a gain >10 can be achieved for this particular sensor.
The Y ersinia pestis   HmsCDE regulatory system is essential for blockage of the oriental rat flea ( X enopsylla cheopis ), a classic plague vector (2014)

The second messenger molecule cyclic diguanylate is essential for Yersinia pestis biofilm formation that is important for blockage-dependent plague transmission from fleas to mammals. Two diguanylate cyclases (DGCs) HmsT and Y3730 (HmsD) are responsible for biofilm formation in vitro and biofilm-dependent blockage in the oriental rat flea Xenopsylla cheopis respectively. Here, we have identified a tripartite signalling system encoded by the y3729-y3731 operon that is responsible for regulation of biofilm formation in different environments. We present genetic evidence that a putative inner membrane-anchored protein with a large periplasmic domain Y3729 (HmsC) inhibits HmsD DGC activity in vitro while an outer membrane Pal-like putative lipoprotein Y3731 (HmsE) counteracts HmsC to activate HmsD in the gut of X. cheopis. We propose that HmsE is a critical element in the transduction of environmental signal(s) required for HmsD-dependent biofilm formation.
Application of Wavelet Analysis to the Automatic Classification of Three-Component Seismic Records (2004)

A method for automatic classification of three-component seismic records is proposed on the basis of the use of the Donoho-Johnstone wavelet shrinkage level as an informative indicator. The method is exemplified by analysis of a set of three-component records of seismic events in mines of the Silesian coal basin (Czech Republic). The inferred clusters of events supposedly differ in the focal mechanism of an event.
On the microscopic approach to the nonlinear dynamics of entangled polymer melts (2004)

A framework for a consistent description of the correlation effects along polymer chains subject to flow is proposed. The formalism shows how correlations between chain segments in the flow can be incorporated into a hierarchy of distribution functions for tangent vectors. The present description allows to take into account all the relevant relaxation mechanisms for slow flows. Special cases of the derived set of equations are shown to yield some existing models and shed some light on the connection between them.
Characteristics of Haemophilus influenzae Type b Responsible for Meningitis in Poland from 1997 to 2004 (2005)

Two hundred forty-five H. influenzae isolates responsible for meningitis in Poland from 1997 to 2004 were studied. Among these, 233 (95.1%) belonged to serotype b (Hib), 2 belonged to serotype f, and 10 were noncapsulated. The relatedness of all isolates was evaluated by pulsed-field gel electrophoresis (PFGE), and selected representatives were evaluated by multilocus sequence typing. Resistance to ampicillin was identified in 34 (14.6%) of the Hib isolates and was associated with the production of beta-lactamase only. Except for four isolates nonsusceptible to chloramphenicol, all isolates were susceptible to cefotaxime, ciprofloxacin, and rifampin. The PFGE analysis divided the Hib isolates into five PFGE types; however, all of them were possibly related. The most common PFGE type, with 25 subtypes, was characteristic for 97.4% of the isolates. The most prevalent PFGE subtype found in our study was also the most common among the Hib isolates responsible for invasive disease in Italy and the Czech Republic and was found among isolates causing lower respiratory tract infections in Poland. The most prevalent sequence types (STs) in the studied group were ST6 and ST92. Four new STs were found: ST188, ST189, ST190, and ST268. Results of this study support the evidence that the genetic structure of encapsulated H. influenzae is clonal. The continuing high number of meningitis cases due to Hib in Poland underlines the need for mass vaccination against Hib in Poland.
Sleep Promotion in the Critical Care Unit (1994)

Promoting the quiet and relaxation necessary for sleep in a busy, noisy critical care environment is a problem critical care nurses face daily. Descriptive studies have defined and increased understanding of this problem, but few interventional studies have been accomplished. Interventions that have demonstrated significant improvements in sleep quality in the critical care environment are an audiotape of the sounds of the ocean or rain, a masking signal, and a back massage
Prostaglandin F 2α elevates blood pressure and promotes atherosclerosis (2009)

Little is known about prostaglandin F(2alpha) in cardiovascular homeostasis. Prostaglandin F(2alpha) dose-dependently elevates blood pressure in WT mice via activation of the F prostanoid (FP) receptor. The FP is expressed in preglomerular arterioles, renal collecting ducts, and the hypothalamus. Deletion of the FP reduces blood pressure, coincident with a reduction in plasma renin concentration, angiotensin, and aldosterone, despite a compensatory up-regulation of AT1 receptors and an augmented hypertensive response to infused angiotensin II. Plasma and urinary osmolality are decreased in FP KOs that exhibit mild polyuria and polydipsia. Atherogenesis is retarded by deletion of the FP, despite the absence of detectable receptor expression in aorta or in atherosclerotic lesions in Ldlr KOs. Although vascular TNF(alpha), inducible nitric oxide enzyme and TGF(beta) are reduced and lesional macrophages are depleted in the FP/Ldlr double KOs, this result reflects the reduction in lesion burden, as the FP is not expressed on macrophages and its deletion does not alter macrophage cytokine generation. Blockade of the FP offers an approach to the treatment of hypertension and its attendant systemic vascular disease.
Sixth sense transport (2012)

In this paper, we consider the challenges associated with providing a mobile computing system that helps users enjoy a more flexible relationship between time and travel. Current travel plans, especially in Western cultures, are dominated by a strict notion of time. The need to conform to schedules leads to increased pressures for travellers and inefficiencies when these schedules cannot be met. We are interested in exploring the extent to which mobile computing can be used to help travellers relax these schedules and adopt a more opportunistic approach to travel -- potentially helping to reduce the environmental, financial and societal costs of modern travel.
Design and implementation of a modern compiler course (2006)

Current literature states that the undergraduate curriculum can no longer afford the luxury of a traditional compiler construction course. Nevertheless, there is an increasing need for an understanding of how to design and implement domain-specific languages. This paper presents a modern course in compiler construction, designed to provide a student with the capability of quickly constructin robust processors for a variety of language-related applications.