gebhart/patrepeval huggingface dataset:
Structural Feature Extraction to recognize some of the Offline isolated Handwritten Gujarati Characters using Decision Tree Classifier (2014)

Large amount of information is prevailing on paper and in an era of digital technology it requires it to store this information in electronic format. Using scanner this information can be digitized. Later any modification in terms of add, editing, removing and searching to it requires a technique or methodology which will identify text from image and convert into ASCII or Unicode. This paper presents recognition of offline handwritten character for Gujarati script using structural features. For proposed experimental work five characters of Gujarati script are considered. Decision tree classifier is proposed for classification. Various phases of character recognition are implemented such as collecting handwritten input, digitization, preprocessing, extracting structural features and recognition. By proposed work authors are able to achieve 88.78% of average success rate for defined five characters.
Properties of Min-Max Controllers in Uncertain Dynamical Systems (1982)

We discuss properties of min-max controllers (previously obtained) for uncertain dynamical systems. In particular, we present a new model for switching action and re-examine asymptotic stability. We demonstrate the attractiveness of switching surfaces and comment on the insensitivity of solutions in those surfaces to the uncertainty.
Using incremental pruning to increase the efficiency of dynamic itemset counting for mining association rules (1998)

Article Free Access Share on Using incremental pruning to increase the efficiency of dynamic itemset counting for mining association rules Author: Jian Tang Department of Computer Science, Memorial University of Newfoundland, St. John's Newfoundland, A1B 3X5 Canada Department of Computer Science, Memorial University of Newfoundland, St. John's Newfoundland, A1B 3X5 CanadaView Profile Authors Info & Claims CIKM '98: Proceedings of the seventh international conference on Information and knowledge managementNovember 1998Pages 273–280https://doi.org/10.1145/288627.288667Published:01 November 1998Publication History 0citation347DownloadsMetricsTotal Citations0Total Downloads347Last 12 Months50Last 6 weeks13 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 SiteeReaderPDF
Active Mitigation of Subsynchronous Interactions Between PWM Voltage-Source Converters and Power Networks (2013)

Pulse-width-modulated (PWM) voltage-source converters (VSCs) are gaining widespread acceptance in modern power systems. It has been shown recently that full-scale high-power PWM VSCs can induce negative electrical damping at subsynchronous frequencies. However, active reshaping of the VSC incremental output impedance to minimize the negative impacts of a VSC on subsynchronous damping is not reported. To fill out this gap, this paper presents: 1) an extended analysis of the output impedance of a PWM-based two-level VSC; and 2) more importantly, three simple and robust active reshaping techniques to maximize the positive electrical damping in the subsynchronous frequencies without affecting the converter control performance. The first reshaping technique uses the grid voltage and an active-damping controller to generate active impedance that modifies the VSC impedance in the subsynchronous range. The second reshaping technique uses an internal active damping controller to modify the dynamics of the phase-locked loop, which has significant contribution to the negative impedance of the VSC. The third reshaping technique combines the first and second techniques. The proposed active mitigation methods show excellent performance in reshaping the VSC impedance and inducing positive electrical damping to mitigate possible subsynchronous interactions between the VSC and the power network. Further, the proposed compensators show robust control performance at different output power levels of the VSC without significant impact on the converter control performance. A theoretical analysis and comparative time-domain simulation and experimental results are presented to verify the validity and effectiveness of the proposed techniques.
Nonlocal and Nonequilibrium Heat Conduction in the Vicinity of Nanoparticles (1996)

Heat transfer around nanometer-scale particles plays an important role in a number of contemporary technologies such as nanofabrication and diagnosis. The prevailing method for modeling thermal phenomena involving nanoparticles is based on the Fourier heat conduction theory. This work questions the applicability of the Fourier heat conduction theory to these cases and answers the question by solving the Boltzmann transport equation. The solution approaches the prediction of the Fourier law when the particle radius is much larger than the heat-carrier mean free path of the host medium. In the opposite limit, however, the heat transfer rate from the particle is significantly smaller, and thus the particle temperature rise is much larger than the prediction of the Fourier conduction theory. The differences are attributed to the nonlocal and nonequilibrium nature of the heat transfer processes around nanoparticles. This work also establishes a criterion to determine the applicability of the Fourier heat conduction theory and constructs a simple approximate expression for calculating the effective thermal conductivity of the host medium around a nanoparticle. Possible experimental evidence is discussed.
Relationship of Polypropylene Fiber Reinforced Concrete to Permeability (1988)

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Thermal Stress Analysis of Textile Yarns (1977)

The technique of thermal stress analysis is discussed in terms of basic yarn mechanical properties, particularly stress relaxation, and in terms of fundamental concepts of fiber fine structure. Examples of stress-temperature data obtained by this technique are given for as-spun, drawn, and textured yarns from polyester, polypropylene, and nylon 66. Several process variables are shown to affect significantly the stress-temperature “fingerprint” of a yarn, including, for as-spun yarns: orientation, ageing, and quenching; for drawn yarns: draw ratio and drawing temperature; and for textured yarns: texturing temperature, overfeed, and dyeing conditions.
Streamer propagation in air in non-axially symmetric electric field (2015)

Development of non-axial streamer discharges in air between disc-electrodes is studied. Discharge inception and propagation between edges of two flat discs is treated with so-called drift-diffusion model accounting for transport, generation and losses of electrons and two generic types of ions (positive and negative) under the influence of the electric field. To simulate propagation of a streamer channel, generation of secondary electrons at the streamer head due to photoionization is included. Partial differential equations constituting the model are solved utilizing custom developed stabilized finite element procedure implemented in commercial software. The results of the performed simulations show that discharge inception takes place in regions of enhanced electrostatic fields at the curved edges of both electrodes and two streamers propagate in air gap towards each other. Quantitative analysis of the dynamics of charge carriers’ densities, generated space charges and magnitudes of the electric fields during streamer initiation and propagation is presented. The effect of space charges and their influence on the streamer propagation path is discussed.
SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF SOME 1,3,4-OXADIAZOLE DERIVATIVES WITH BENZOXAZOLE MOIETY (2015)

Synthesis of 1,3,4-oxadiazole derivatives has attracted considerable attention in view of therapeutic applications. In the presented research work, a series of novel 5-substituted-1,3,4-oxadiazole-2-thiol containing piperazinyl benzoxazole compounds by integrating piperazinyl benzoxazoles with 5-substituted-1,3,4-oxadiazole-2-thiol. All the synthesized compounds have been characterized by using elemental analysis, FT-IR, 1H NMR, 13C NMR spectroscopy and further supported by mass spectroscopy. Purity of all the compounds has been checked on thin layer chromatographic plate and HPLC technique. All the synthesized compounds were screened for their antibacterial activities against Staphylococcus aureus, Staphylococcus pyogenus, Escherichia coli and Pseudomonas aeruginosa and for antifungal activity against Candida albicans and Asperigillus niger . The biological activities of the synthesized compounds have been compared with standard drugs like Ampicillin and Greseofulvin. The compounds exhibited significant antibacterial and moderate antifungal activities. These compounds can be further exploited to get the potent lead compounds. The detailed synthesis and the antimicrobial screening of the new compounds are reported. Keywords: 1,3,4-Oxadiazole, Benzoxazole, Piperazine, Antibacterial activity, Antifungal activity.
THE USE OF FORMALIN FIXATION IN THE CYTOCHEMICAL DEMONSTRATION OF SUCCINIC AND DPN- AND TPN-DEPENDENT DEHYDROGENASES IN MITOCHONDRIA (1963)

Brief formalin fixation in the cold prior to histochemical assay of rat liver and pancreas for various dehydrogenases has been used successfully to circumvent the structural damage and enzymatic loss to which mitochondria of frozen sections would otherwise be subject. To obtain an optimal result a single set of conditions has been devised, including fixation prior to freezing of minute (finely diced) organ blocks in graded concentrations (0.7 to 2.0 per cent) of formaldehyde in chilled (1-4 degrees C) Hanks' balanced salt solution, freezing at not higher than -70 degrees C, and use of nitro-BT or, preferably, tetranitro-BT. The present histochemical study of hepatic and acinar cells indicates that not only are succinic and D-beta-hydroxybutyric dehydrogenases located exclusively in the mitochondria but so are lactic, malic, and the isocitric dehydrogenases.
Reliable voiced/Unvoiced decision (1979)

A speech processing system has been developed which is capable of providing an accurate indication of whether or not a given speech segment is voiced or unvoiced. In comparison to other existing techniques, this one avails itself for easy implementation, and it offers a realiable voiced/unvoiced (V/UV) decision even in the presence of some competing speech and noise sources. In addition, the V/UV decision is achieved in real time with time delays of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\leq 4</tex> ms going from voiced to unvoiced speech, and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\leq 2</tex> ms going from unvoiced to voiced speech.
Exploiting transparent remote memory access for non-contiguous- and one-sided-communication (2002)

The availability of an implementation of the Message Passing Interface (MPI) is essential for each interconnect designed for communication in HPC clusters. Using the open-source implementation of MPI, MPICH, and creating a communication device for it based upon the low-level communication libraries of the interconnect, this goal can be achieved quiet easily. However, optimizing the resulting MPI implementation to make maximum benefit of the characteristics of the interconnect is a more complex task. This paper presents two of the most recent optimizations in SCI-MPICH, an MPICH variant for the SCI interconnect, which make use of the global shared memory provided by this interconnect: efficient communication with non-contiguous MPI datatypes and one-sided communication according to the MPI-2 standard. We show that the transparent low-latency communication characteristics of SCI provides these techniques an excellent platform.
Expression, purification, and functional characterization of recombinant PTD-SARA (2011)

The Smad anchor for receptor activation (SARA) protein is a binding partner for Smad2/3 that plays an important role in the fibrotic promoting signaling pathway initiated by transforming growth factor-β1 (TGF-β1). The C-terminal 665-750 aa of SARA comprises the Smad-binding domain (SBD). By direct interaction through the SBD, SARA inhibits Smad2/3 phosphorylation and blocks the interaction between Smad2/3 and Smad4, thereby restrains the process of fibrosis. In this study, we constructed a SARA peptide aptamer based on the SBD sequence. The recombinant SARA aptamer, fused with a protein transduction domain (PTD-SARA), was cloned, purified from E. coli, and characterized for the first time. The full-length PTD-SARA coding sequence, created with E. coli favored codons, was cloned into a pQE-30 vector, and the recombinant plasmid was transformed into an M15 strain. After Isopropyl β-D-1-Thiogalactopyranoside (IPTG) induction and Ni(2+) affinity purification, recombinant PTD-SARA was further identified by immunoblotting and protein N-terminal sequencing. Epifluorescence microscopy revealed that the recombinant PTD-SARA was transferred into the cytoplasm and nucleus more efficiently than SARA. Moreover, the recombinant PTD-SARA was found to up-regulate the level of E-cadherin and down-regulate the levels of α-SMA and phospho-Smad3 more efficiently than SARA (P < 0.05). Our work explored a method to obtain recombinant PTD-SARA protein. The recombinant PTD-SARA fusion protein could enter HK2 cells (an immortalized proximal tubule epithelial cell line) more efficiently than the SARA protein and reverse the renal epithelial-to-mesenchymal transdifferentiation process that was induced by TGF-β1 more effectively than the SARA protein. Recombinant PDT-SARA is likely to be a potential candidate for clinical prevention and treatment of renal fibrosis.
Effects of dronedarone on Acetylcholine‐activated current in rabbit SAN cells (2000)

1. The effect of the antiarrhythmic drug dronedarone on the Acetylcholine-activated K(+) current (I(K(ACh))) was investigated in single cells isolated from sinoatrial node (SAN) tissue of rabbit hearts. 2. Externally perfused dronedarone (0.001 - 1 microM) caused a potent, voltage independent block of I(K(ACh)). Fitting of the dose response curve of I(K(ACh)) block yielded an IC(50) value of 63 nM, a value over one order of magnitude lower than those reported for dronedarone block of other cardiac currents. 3. I(K(ACh)) block was not due to an inhibitory action of dronedarone on the muscarinic M2 receptor activation, since the drug was effective on I(K(ACh)) constitutively activated by intracellular perfusion with GTP-gammaS. 4. External cell perfusion with dronedarone inhibited the activity of I(K(ACh)) channels recorded from cell-attached patches by reducing the channel open probability (from 0.56 to 0.11) without modification of the single-channel conductance. 5. These data suggest that dronedarone blocks I(K(ACh)) channels either by disrupting the G-protein-mediated activation or by a direct inhibitory interaction with the channel protein.
TWIN STRIP ELECTROSLAG CLADDING (2016)

The article is aimed at verifying the state of a real workplace using virtual reality.In analyzing the readiness of virtual reality applications, augmented reality was selected for the following work.The most significant advantage of augmented reality is the implementation of a virtual model and the ability to deal with the analysis in a real environment, which is particularly beneficial in the case of production plants.In the first phase of the work, an analysis of the current state of the workplace was carried out, where the requirements for the design of the new workplace were specified.This was followed by the phase of design preparation in 3D modeller.At this very stage it appeared to be advantageous to use virtual reality applications; in the design process, regular approval procedures are required as for an expert team (management, design, quality, ...), which puts high qualification requirements on the readiness of this team.In this phase, the 3D design of the new workplace was inserted into the application supported by augmented reality and some options were indicated to deal with the ergonomic and risk analysis.The result of this work is, in particular, an extension of options in designing and analyzing production workplaces and machinery in multidisciplinary teams.
A Cost Effective 19 GHz Digital Multipoint Radio System for Local Distribution Applications. (1984)

Recommendations for transportation of lambs, horses, calves, and pigs from a committee of the European Commission, which required rest stops of 6 or 24 h, every 8 h, were evaluated using Rambouillet x Suffolk lambs. The lambs of 17.6 +/- 0.5 kg of BW were randomly assigned to 1 of 3 treatments: transported for 22 h (continuous; n = 15); transported for 8 h, unloaded and rested for 6 h, transported for 8 h, unloaded and rested for 24 h, transported for 6 h (rested, n = 15); or remained in the home pasture throughout the study (control, n = 16). Off-trailer rest with food and water occurred in novel pens. Food deprivation in the continuous lambs was reflected by a decrease (P < 0.001) in plasma concentrations of glucose and an increase (P < 0.02) in plasma concentrations of blood urea nitrogen, creatinine, and total bilirubin relative to rested or control lambs. Electrolytes varied within and among all 3 treatments (P < 0.05), but no distinct pattern indicating dehydration was evident. Serum concentrations of cortisol were elevated in continuous and rested lambs compared with control lambs at 22 h (P < 0.05). Plasma immunoglobulin G antibody response to ovalbumin was suppressed (P < 0.05) in the continuous and rested lambs relative to the control lambs. Differences (P < 0.05) between continuous and rested lambs indicated the rest stops were sufficient to maintain BW during transport; however, these results were confounded by the control lambs losing a similar (P = 0.50) percentage of their initial BW as the continuous lambs at 22 h. The rest stops eliminated the physiological indicators of food deprivation and maintained BW but did not alleviate evidence of immunosuppression, and 52 h was required to complete the otherwise 22-h-long trip.
Modified Photoperiod and Light Intensity Influence on Survival and Growth of Stage 2 Juvenile Signal Crayfish<i>Pacifastacus leniusculus</i> (1996)

In an 80-day experiment performed with stage 2 juvenile signal crayfish, Pucifastacus leniusculus, under laboratory conditions, two photoperiod/light intensity combinations were tested: natural light conditions (light period lasting between 13.5 and 15 hours/day) and modified light conditions (20:4; 850 lux). There were no significant (P < 0.05) differences in survival (natural light = 55.0% and modified light = 62.5%) and growth rates between treatments. Using conditions in the present study, it may not be necessary to increase photoperiod and light intensity from natural conditions, when raising juvenile signal crayfish indoors.
Protecting Cryptographic Keys from Memory Disclosure Attacks (2007)

Cryptography has become an indispensable mechanism for securing systems, communications and applications. While offering strong protection, cryptography makes the assumption that cryptographic keys are kept absolutely secret. In general this assumption is very difficult to guarantee in real life because computers may be compromised relatively easily. In this paper we investigate a class of attacks, which exploit memory disclosure vulnerabilities to expose cryptographic keys. We demonstrate that the threat is real by formulating an attack that exposed the private key of an OpenSSH server within <b xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</b> minute, and exposed the private key of an Apache HTTP server within <b xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</b> minutes. We propose a set of techniques to address such attacks. Experimental results show that our techniques are efficient (i.e., imposing no performance penalty) and effective - unless a large portion of allocated memory is disclosed.
Asymptotic analysis of corona discharge from thin electrodes (1986)

The steady discharge of a high-voltage corona is analyzed as a singular perturbation problem. The small parameter is the ratio of the length of the ionization region to the total gap length. By this method, current versus voltage characteristics can be calculated analytically.
Some Neglected Ways of Words (1969)

Words have ways which are so numerous (accourding to some mystics) that they are transinfinite (greater than Aleph N). Only a few of these ways are wayworn, while some other ones are only wayward, and still others of them are never even noticed by the wayside, by the way. It is a profound understatement to say that the world will sleep forever through the aeons with never the utleast awareness of most of these ways, even as some of the dearest and most wanted children shall never be born.
Context-Oriented Programming with the Ambient Object System (2020)

In this paper we present AmOS, the Ambient Object System that underlies the Ambience programming language. AmOS implements a computation model that supports highly dynamic behaviour adaptation to changing contexts. Apart from being purely object-based, AmOS features first-class closures, multimethods and contexts. Dynamic method scoping through a subjective dispatch mechanism is at the heart of our approach. These features make of AmOS a very simple and elegant paradigm for context-oriented programming.
Multicolor Surface Plasmon Resonance Imaging of Ink Jet-Printed Protein Microarrays (2007)

We report a technique that utilizes surface plasmon resonance dispersion as a mechanism to provide multicolor contrast for imaging thin molecular films. Illumination of gold surfaces with p-polarized white light in the Kretschmann configuration produces distinct reflected colors due to excitation of surface plasmons and the resulting absorption of specific wavelengths from the source light. In addition, these colors transform in response to the formation of thin molecular films. This process represents a simple detection method for distinguishing between films of varying thickness in sensor applications. As an example, we interrogated a protein microarray formed by a commercial drop-on-demand chemical ink jet printer. Submonolayer films of a test protein (bovine serum albumin) were readily detected by this method. Analysis of the dispersion relations and absorbance sensitivities illustrate the performance and characteristics of this system. Higher detection sensitivity was achieved at angles where red wavelengths coupled to surface plasmons. However, improved contrast and spatial resolution occurred when the angle of incidence was such that shorter wavelengths coupled to the surface plasmons. Simplified optics combined with the robust microarray printing platform are used to demonstrate the applicability of this technique as a rapid and versatile, high-throughput tool for label-free detection of adsorbed films and macromolecules.