gebhart/patrepeval huggingface dataset:
Las tecnologías de la información y comunicación en el sistema escolar. Una revisión de las líneas de investigación. [The Information and Communication Technologies in the school system. A review of the research lines] (2005)

This paper offers a classification of research trends and perspectives about processes oriented to incorporate information and communication technologies (ICT) in schools. Identified are four research trends: a) studies about indicators of computers quantity in school systems; b) studies about computer effects in learning; c) studies about opinion, perspectives and attitudes of educational agents to ICT; and d) studies about computers' educational use in classroom and colleges. This paper finishes with a synthesis of current knowledge about projects and programs intended for the embodiment of ICT in school systems. Este artículo ofrece una clasificación de las distintas perspectivas y líneas de investigación que han analizado y evaluado los fenómenos vinculados con la incorporación y utilización de las tecnologías de las información y comunicación (TIC) en la los centros y aulas de los sistemas escolares. Se identifican cuatro grandes líneas de investigación: a) estudios sobre indicadores cuantitativos del grado de presencia de las TIC en los sistemas escolares; b) estudios sobre los efectos de los ordenadores en el aprendizaje escolar; c) estudios sobre las perspectivas, opiniones y actitudes de los agentes educativos hacia las TIC; y d) estudios sobre las prácticas de uso de ordenadores en los contexto escolares tanto de centro como de aula. Finaliza el artículo con una síntesis del conocimiento derivado de dichos estudios en torno a los fenómenos que acompañan a los programas y proyectos de incorporación de las TIC a los sistemas escolares.
Real-time preprocessing of holographic information (1995)

Optical scanning holography (OSH) is a holographic recording technique that uses active optical heterodyne scanning to generate holographic information pertaining to an object. The holographic information manifests itself as an electrical signal suitable for real-time image reconstruction using a spatial light modulator. The electrical signal that carries the holographic information can also be digitized for computer storage and processing, allowing the image reconstruction to be performed numerically. In previous experiments with this technique, holographic information has been recorded using the interference pattern of a plane wave and a spherical wave of different temporal frequencies to scan an object. However, the proper manipulation of the pupil functions in the recording stage can result in real-time processing of the holographic information of an object during recording. We propose a holographic edge extraction technique as an important example of real-time preprocessing of holographic information that utilizes alternate pupils in the OSH recording stage. We investigate the theory of holographic preprocessing using a spatial frequency-domain analysis based on the recording system's optical transfer function. The theory is reinforced through computer simulation.
Single Crystalline ScAlN Surface Acoustic Wave Resonators with Large Figure of Merit (Q × kₜ²) (2019)

Surface acoustic wave (SAW) resonators based on single crystalline aluminum nitride (AlN) and scandium aluminum nitride (ScAlN) grown by molecular beam epitaxy (MBE) demonstrated substantial improvement in acoustic performance compared to the state-of-art devices with sputtered piezoelectric layers on silicon substrates. High coupling coefficient (k <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) up to 5.0% and 7.8% were found in resonators with AlN and ScAlN device layers, respectively, due to better crystallinity and scandium doping. This resulted in high figure of merits (Q×k <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) among SAW devices on silicon up to 5.4, which is about twice larger than the previous work using sputtered ScAlN on silicon and comparable to those on non-silicon substrates.
Charge-trap memory device fabricated by oxidation of Si/sub 1-x/Ge/sub x/ (2001)

In this work, we describe a novel technique of fabricating germanium nanocrystal quasi-nonvolatile memory device. The device consists of a metal-oxide-semiconductor field-effect transistor (MOSFET) with Ge charge-traps embedded within the gate dielectric. The trap formation method provides for precise control of the thicknesses of the top (control) and bottom (tunneling) oxide layers which sandwich the charge-traps, via thermal oxidation. This memory device exhibits write/erase speed/voltage and retention time superior to previously reported nano-crystal or charge-trap memory devices. A detailed description of the novel process for fabricating the Ge charge-trap MOS memory is given, along with the resultant memory-cell performance characteristics.
ASP in a nutshell : a desktop quick reference (1999)

Active Server Pages (ASP) has become a standard for developing server-side Web applications. Prior to the development of ASP and other earlier scripting solutions, such as Sun's Java, Netscape's JavaScript, and Microsoft's VBScript, all information served to the client's browser was static - the Web server did not dynamically generate any part of the site's content. ASP allows Web developers to dynamically generate browser-neutral content. This text provides the documentation that developers really need to create effective ASP applications. It focuses on how features are used in a real application and highlights little-known or undocumented features as well. This book also includes an overview of the interaction of the latest release of Internet Information Server (version 4) and ASP, with an introduction to the IIS object model and the objects it comprises. The examples given in this section and throughout the book are illustrated in VBScript. This book is written for Web developers with an extensive knowledge base and years of experience behind them. Like other books in the In a Nutshell series, this book offers the facts, including critical background information. It is a detailed reference that enables even experienced Web developers to advance their ASP applications to new levels.
Design and implementation of a shared workspace by integrating individual workspaces (1990)

This paper proposes “TeamWorkStation” (TWS) as an approach to an effective shared workspace for the support of remote collaboration. There are three key design objectives in TWS: integration of virtual and actual workspaces, a simultaneously-accessible shared drawing surface, and smooth transition between individual workspaces and shared workspace. To achieve these objectives, images of computers and/or paper are overlaid so that information and images from both are effectively combined and distributed to the group members.
Ensemble Feature Selection Methods for a Better Regularization of the Lasso Estimate in P &#x003E;&#x003E; N Gene Expression Datasets (2013)

The problem of variable selection from a large number of candidate predictors has recently been addressed in the machine learning of bioinformatics field. This is due to advances in high-throughput micro array techniques such as Affymetrix Gene Chips, and Illumina micro arrays that allow for studying thousands of genes in a single experiment. However, the resultant data from such genomic tools suffers from an p >> n problem, where the number of genes (p) to be examined is much larger than the number of samples (n). In such a model selection, the learning is considered hard, and the goal is to achieve accurate predictions from the inferred models alongside with their interpretability. Towards this goal, this work will experiment with feature selection methods and show how to improve the choice of the tuning parameter (s) in the lasso estimate feature selection method by adding an extra layer of filter feature selection methods to the lasso estimate path when learn from p n gene expression datasets. The results show that when the lasso estimate is ensemble with filter feature selection methods, the prediction accuracy for the chosen predictors for each targeted variable has improved.
7-Azidoactinomycin D: a novel probe for examining actinomycin D-DNA interactions (1989)

The technique of photoaffinity labeling is applied to the actinomycin D system to provide a novel probe for the examination of the interactions of actinomycin D with nucleic acids. The capacity for covalent attachment of actinomycin D will aid greatly in the study of target-site specificities and the correlations of biological effects with biophysical DNA interactions. Through chemical modification of the parent actinomycin D molecule with a photoreactive azido substituent, a functional analog of the parent actinomycin D is generated having equilibrium binding properties identical to those of the parent molecule yet with the capacity to form a covalent attachment to DNA upon photolysis. The results presented here describe the noncovalent interactions of this photoreactive probe to DNA (absence of light) and compares the binding properties observed to those of the parent actinomycin D and 7-aminoactinomycin D analog. These studies demonstrate that the DNA binding properties (i.e. binding affinity, binding site size, and sequence specificity) retained by the 7-azidoactinomycin D, thus providing a suitable probe for examining actinomycin D-DNA interactions.
A RAKE type receiver structure for CDMA mobile communication systems using antenna arrays (2002)

A new procedure is proposed for resolving multipaths for the wireless channel. This method uses antenna arrays at the base station to estimate the direction of arrival (DOA) of the multipaths. Beams are formed in the specific DOAs. Thus the significant paths can be separated from one another and then fed into the fingers of a RAKE type receiver. Each finger is adaptively adjusted for delay to achieve optimum combining. We show that such enhancement greatly improves the system performance. Results of preliminary simulation studies are also presented.
A Study on Criteria for Handling Hazardous Chemicals (2018)

The use of chemicals to enhance and improve life is a widespread practice worldwide. But alongside the benefits of these products, there is also the potential for adverse effects to people or the environment. Thus, If anyone handles hazardous chemicals, they should adhere to specific criteria for hazardous chemicals. This study used hazard statement(H-code) and precautionary statement(P-code) to set specific criteria for handling chemicals. According to the UN GHS, hazard statement means a statement assigned to a hazard class and category that describes. And a precautionary statement is a phrase which describes recommended measures that should be taken to minimize or prevent adverse effects resulting from exposures to a hazardous product, or improper storage or handling of a hazardous product. The study suggests the treatment criteria(Public Notice) of 785 types of hazardous chemicals managed by the Chemical Control Act.
Current Trends and Issues in Automatic Mesh Generation (2006)

In new business-to-business relations within the aerospace industry, companies join together in partnership to perform product development, taking full responsibility for their product during its entire life cycle.This paper describes a method on how these downstream effects can be simulated in a cross-company collaborative situation.A case study was conducted where a jet engine component manufacturer and a tool manufacturer used each other's expertise in a collaborative approach to make "holes" in a jet engine component.Ten conceptual jet engine frames were collaboratively evaluated within two working days.The distributed engineering environment creates a new situation for the partnership companies by allowing them to work efficiently within the activities that have been incorporated into the distributed engineering environment.Downstream effects of the overall system can then be evaluated already in the conceptual phase, thus allowing the partners to design the life cycle properties of their common product.
Über zweistufige Redoxsysteme, IV. Radikal‐Kationen aus substituierten Thiazolon‐(2)‐azinen (1971)

Abstract Die Thiazolon‐(2)‐azine 5 Red lassen sich zu den Azo‐Dikationen 5 Ox oxydieren. 5 Red und 5 Ox komproportionieren quantitativ zu den Radikal‐Kationen 5 Sem , die als Perchlorate ebenfalls isoliert werden. Alle drei Partner des Redoxsystems werden durch ihre Elektronenspektren charakterisiert. Die Synthese von 5 Red mit verschiedenen Substitutenten R 3 und R 4 über mehrere Zwischenstufen wird beschrieben.
Bidirectional feedback dynamic particle filter with big data for the particle degeneracy problem (2018)

Particle Filter (PF) is a data assimilation method to solve recursive state estimation problem which does not depend on the assumption of Gaussian noise, and is able to be applied for various systems even with non-linear and non-Gaussian noise. However, while applying PF in dynamic systems, PF undergoes particle degeneracy, sample impoverishment, and problems of high computational complexity. Rapidly developing sensing technologies are providing highly convenient availability of real-time big traffic data from the system under study like never before. Moreover, some sensors can even receive control commands to adjust their monitoring parameters. To address these problems, a bidirectional dynamic data-driven improvement framework for PF (B3DPF) is proposed. The B3DPF enhances feedback between the simulation model and the big traffic data collected by the sensors, which means the execution strategies (sensor data management, parameters used in the weight computation, resampling) of B3DPF can be optimized based on the simulation results and the types and dimensions of traffic data injected into B3DPF can be adjusted dynamically. The first experiment indicates that the B3DPF overcomes particle degeneracy and sample impoverishment problems and accurately estimates the state at a faster speed than the normal PF. More importantly, the new method has higher accuracy for multidimensional random systems. In the rest of experiments, the proposed framework is applied to estimate the traffic state on a real road network and obtains satisfactory results. More experiments can be designed to validate the universal properties of B3DPF.
Microstructure and Dielectric Properties of LiTiNiO Thin Films (2007)

LiTiNiO thin films were deposited on Pt/Ti/SiO2/Si(100) substrates using a sol-gel spin-coat method. The effects of annealing temperature and annealing time on microstructures and dielectric properties of the thin films were investigated. SEM images showed the thin films had uniform and dense microstructure and the grain size increased with increasing temperature and time. The LiTiNiO thin films consisted of complex oxides which proportions were mainly dependent on the annealing condition. The LiTiNiO thin film annealed at 600°C for 1h showed the highest dielectric constant and frequency stability, while prolonging annealing time even at 600°C resulted in the decrease in the frequency stability of the dielectric constants.
N2-Phenyldeoxyguanosine: a novel selective inhibitor of herpes simplex thymiding kinase (1988)

A series of N2-substituted guanine derivatives was screened against mammalian thymidine kinase and the thymidine kinase encoded by type I herpes simplex virus to examine their capacity to selectivity inhibit the viral enzyme. Several bases, nucleosides, and nucleotides displayed selective activity. The mechanism of action of the most potent derivative, N2-phenyl-2'-deoxyguanosine (PhdG) was studied in detail. PhdG (a) inhibited the viral enzyme competitively with respect to the substrates thymidine and deoxycytidine, (b) was completely resistant to phosphorylation, (c) displayed limited toxicity for the HeLa cell lines employed as hosts for viral infection, and (d) selectively inhibited viral thymidine kinase function in intact cultured cells. The results indicate that the PhdG drug prototype has potential as a selective anti-herpes agent and as a novel molecular probe of the structure and function of herpes simplex thymidine kinase.
Selective E to Z isomerization of 1,3-Dienes Enabled by A Dinuclear Mechanism (2021)

The E/Z stereocontrol in a C=C bond is a fundamental issue in olefin synthesis. Although the thermodynamically more stable E geometry is readily addressable by thermal Z to E geometric isomerization through equilibrium, it has remained difficult to undergo thermal geometric isomerization to the reverse E to Z direction in a selective manner, because it requires kinetic trapping of Z-isomer with injection of chemical energy. Here we report that a dinuclear Pd<sup>I</sup>-Pd<sup>I</sup> complex mediates selective isomerization of E-1,3-diene to its Z-isomer without photoirradiation, where kinetic trapping is achieved through rational sequences of dinuclear elementary steps. The chemical energy required for the E to Z isomerization can be injected from an organic conjugate reaction through sharing of common Pd species.
A NOVEL COMPUTATIONAL APPROACH TO THE COMBINE OPTICAL AND THERMAL MODELLING OF A LINEAR FRESNEL COLLECTOR RECEIVER (2015)

A computational approach is presented that uses the finite volume (FV) method in the Computational Fluid Dynamics (CFD) solver ANSYS Fluent to perform both the ray tracing required to quantify the optical performance of a lineconcentration Linear Fresnel Collector (LFC) receiver, as well as the conjugate heat transfer modelling required to estimate the thermal efficiency of such a receiver. It is shown that the Discrete Ordinates method can provide an accurate solution of the Radiative Transfer Equation (RTE) if the shortcomings of its solution are addressed appropriately in the FV CFD solver. This approach is evaluated for a 2-D sample test case that includes a 2-D LFC optical domain of which the results are compared to those obtained with the Monte Carlo ray tracer, SolTrace. The outcome of the FV ray tracing in the LFC optical domain is mapped as a non-uniform heat flux distribution in the 3-D cavity receiver domain and this distribution is included in the FV conjugate heat transfer CFD model as a volumetric resource. The result of this latter model is the determination of the heat transferred to the heat transfer fluid running in the collector tubes, thereby providing an estimation of the overall thermal efficiency. To evaluate the effectiveness of the phased approach, the 2-D:3-D approach is compared to results of a fully integrated, but expensive, 3-D optical and thermal model. It is shown that the less expensive model provides similar results and that it provides the benefit of working in one simulation environment, i.e., ANSYS Workbench, where additionally optimization studies can be performed in future work.
EARLY EFFECT OF IRRADIATION AND HISTOLOGICAL SUB-TYPE OF CERVICAL CANCER OF UTERUS (1980)

In the cases of radiotherapy of cervical cancer of uterus, radiosensitivity of cancer tissue has an important influence on the prognosis and on the selection of the therapeutic method. For radiotherapist, it is very beneficial to interpret radiosensitivity before radiotherapy or on the early time of radiotherapy.We classified epidermoid carcinoma of cervix into three sub-types, each of which has respectively different radiosensitivity. Three sub-type s are as followed.Type I : Keratinizing type, high degree of Keratinization.Type II : Basal cell type, uniform proliferation of spindle cell. Type III : Intermediate type, intermediate disposition between keratinizing type and basal cell type.As to early time of irradiation, keratinizing type has low radiosensitivity, and basal cell type has high radiosensitivity. Intermediate type has middle radiosensitivity.Moreover early radiosensitivity correlate with prognosis. Early radiosensitivity could be manifest ed by histological changes observed 6 hours after 400 rad irradiation.
Mobile Agent: Load Balanced Process Migration in Linux Environments (2015)

This is an attempt to gain better performance in executing the processes in distributed environments, which allows execution environments to move processes from processor to processor dynamically at any point in the life of the process. In this paper, a migration algorithm is proposed to migrate the processes dynamically to lightly loaded host using the CPU load as migration criteria. During the migration, the algorithm takes care of identifying the live nodes and migrate the process to lightly loaded workstation. The centralized server maintains the status and load of each node in the NOW. Agents are running independently and are solely responsible for deciding if process need to be migrated or not based on the load of hosts. Agent node will be responsible for keeping track of load and if exceeds the defined threshold, decision will be made to migrate the process. In a case decided, it identifies the lightly loaded host and transfers state of the process to the target hosts. On the target hosts, the state is collected and the process resumes the execution and sends the result back to the source machine which initiated the request to migrate the process. By dynamically moving processes throughout their lifetimes, the system can potentially adapt better to changes in the load that could not be foreseen at the start of the tasks. Proponents of process migration claim that this dynamic adaptation leads to a better system-wide utilization of available resources than static process scheduling.
Adaptive techniques for multiuser CDMA receivers (2000)

A number of CDMA receivers have been proposed that cover the whole spectrum of performance/complexity from the simple matched filter to the optimal Viterbi (1995) processor. Adaptive solutions, in particular, have the potential of providing the anticipated multiuser detection (MD) performance gains with a complexity that would be manageable for third generation systems. Our goal, in this article, is to provide an overview of previous work in MD with an emphasis on adaptive methods. We start with (suboptimal) linear receivers and discuss the data-aided MMSE receiver. Blind (nondata-aided) implementations are also reviewed together with techniques that can mitigate possible multipath effects and channel dispersion. In anticipation of those developments, appropriate discrete-time (chip rate) CDMA models are reviewed, which incorporate asynchronism and channel dispersion. For systems with large spreading factors, the convergence and tracking properties of conventional adaptive filters may be inadequate due to the large number of coefficients which must be estimated. In this context, reduced rank adaptive filtering is discussed. In this approach, the number of parameters is reduced by restricting the receiver tap vector to belong to a carefully chosen subspace. In this way the number of coefficients to be estimated is significantly reduced with minimal performance loss.
An improved array feed parabolic reflector antenna for spatial power combining (2009)

A new design of offset array feed parabolic reflector antenna, in which the feeding array is configured based on the Huygens-Fresnel principle, is proposed for spatial power combining. In the new design, the feeding array is not placed at the focus of the parabolic reflector but on the wave-front radiated from the point feed located at the focus. The amplitudes and the phases of the array elements are set to simulate the distribution of wave-front of the point feed. It is shown by the simulation that the new design can combine the power at the desired direction more efficiently than tradition configure that places the array at the focus.