gebhart/patrepeval huggingface dataset:
Da preservação documental à formação para a cidadania: a extensão universitária a partir da memória dos trabalhadores (2015)

The Centro de Memória, Documentação e Hemeroteca Sindical “Florestan Fernandes” (CEMOSi), Faculty of Science and Technology UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho", among its functions and objectives, works with the university extension project “Building the Memory Center, Documentation and Labor Union Hemeroteca "Florestan Fernandes' and the production of documentary film, which also has operations in the preservation of the working memory and social movements of the city and countryside, develops research and extension activities inside and outside the university, from portrayed in its collection themes. In this sense, we present the center, addressing some of its trajectory, its objectives, activities and how they are developed. In addition, we will point out some results achieved to date as well as the horizons we aspire, and which our considerations about the development of the Project.
Developmental changes in transmitter sensitivity and synaptic transmission in embryonic chicken sympathetic neurons innervated in Vitro (1991)

Dispersed neurons from embryonic chicken sympathetic ganglia were innervated in vitro by explants of spinal cord containing the autonomic preganglionic nucleus or somatic motor nucleus. The maturation of postsynaptic acetylcholine (ACh) sensitivity and synaptic activity was evaluated from ACh and synaptically evoked currents in voltage-clamped neurons at several stages of innervation. All innervated cells are more sensitive to ACh than uninnervated neurons regardless of the source of cholinergic input. Similarly, medium conditioned by either dorsal or ventral explants mimics innervation by enhancing neuronal ACh sensitivity. This increase is due to changes in the rate of appearance of ACh receptors on the cell surface. There are also several changes in the nature of synaptic transmission with development in vitro, including an increased frequency of synaptic events and the appearance of larger amplitude synaptic currents. In addition, the mean amplitude of the unit synaptic current mode increases, as predicted from the observed changes in postsynaptic sensitivity. Although spontaneous synaptic current amplitude histograms with multimodal distributions are seen at all stages of development, histograms from early synapses are typically unimodal. Changes in the synaptic currents and ACh sensitivity between 1 and 4 days of innervation were paralleled by an increase in the number of synaptic events that evoked suprathreshold activity in the postsynaptic neurons. The early pre- and postsynaptic differentiation described here for interneuronal synapses formed in vitro may be responsible for increased efficacy of synaptic transmission during development in vivo.
Non-Foster Impedance Matching for Transmit Applications (2006)

We give experimental results showing the gain-bandwidth advantages of using non-Foster networks (i.e. containing negative inductors and capacitors) to impedance match an electrically-small antenna to a transmitter. Over a given bandwidth, non-Foster achieves up to 20 dB more transducer power gain than any passive design. The overall power efficiency advantage of non-Foster networks is limited by the required DC bias power. We demonstrate a class-B biasing strategy that, when fully developed, will make non-Foster transmit matching more efficient than any passive design. BACKGROUND
Nanocapsule Technology: A Review (2002)

Nanocapsules are submicroscopic colloidal drug carrier systems composed of an oily or an aqueous core surrounded by a thin polymer membrane. Two technologies can be used to obtain such nanocapsules: the interfacial polymerization of a monomer or the interfacial nanodeposition of a preformed polymer. This article is an extended review of these nanocapsule technologies and their applications for the treatment of various diseases (including cancer and infections).
Compression of diagnostic resting electrocardiograms (2002)

dA new scheme for the reduction of resting electrocardiograms (ECGs) is designed. A representative cycle is computed from the resting ECG record. This cycle, sampled at 500S/s and with amplitude quantization of 5 mu V/LSB is compressed by redundancy reduction. The representative cycle is subtracted from the original record at all complex locations. The remaining data-the residual-can then be compressed by the reduction of sampling rate, coarsed amplitude quantization and Huffman encoding. To preserve QRS details within reconstructed records the respective data sections are only redundancy reduced. By means of the new method compression ratios of 10-30 are obtained.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
<i>N</i>-Acetylglucosamine and Glucosamine-Containing Arabinogalactan Proteins Control Somatic Embryogenesis (2001)

In plants, complete embryos can develop not only from the zygote, but also from somatic cells in tissue culture. How somatic cells undergo the change in fate to become embryogenic is largely unknown. Proteins, secreted into the culture medium such as endochitinases and arabinogalactan proteins (AGPs) are required for somatic embryogenesis. Here we show that carrot (Daucus carota) AGPs can contain glucosamine and N-acetyl-D-glucosaminyl and are sensitive to endochitinase cleavage. To determine the relevance of this observation for embryogenesis, an assay was developed based on the enzymatic removal of the cell wall from cultured cells. The resulting protoplasts had a reduced capacity for somatic embryogenesis, which could be partially restored by adding endochitinases to the protoplasts. AGPs from culture medium or from immature seeds could fully restore or even increase embryogenesis. AGPs pretreated with chitinases were more active than untreated molecules and required an intact carbohydrate constituent for activity. AGPs were only capable of promoting embryogenesis from protoplasts in a short period preceding cell wall reformation. Apart from the increase in embryogenesis, AGPs can reinitiate cell division in a subpopulation of otherwise non-dividing protoplasts. These results show that chitinase-modified AGPs are extracellular matrix molecules able to control or maintain plant cell fate.
Recognition and correction of voice web search queries (2009)

In this work we investigate how to recognize and correct voice web search queries. We describe our corpus of web search queries and show how it was used to improve recognition accuracy. We show that using a search-specific vocabulary with automatically generated pronunciations is superior to using a vocabulary limited to a fixed pronunciation dictionary. We conducted a formative user study to investigate recognition and correction aspects of voice search in a mobile context. In the user study, we found that despite a word error rate of 48%, users were able to speak and correct search queries in about 18 seconds. Users did this while walking around using a mobile touch-screen device. Index Terms: speech recognition, voice search, error correction, mobile web search
Leptin as a Therapeutic Agent—Trials and Tribulations (2000)

Obesity is a prevalent condition that is reaching epidemic proportions in the United States. Sixty-three percent of men and 55% of women are overweight [body mass index (BMI) of 25 kg/m 2 or higher], whereas 22% of the United States adult population is obese (BMI of 30 kg/m 2 or higher) (1). More importantly, the prevalence of obesity has almost doubled in the past decade (1). The consequences of obesity are serious. Approximately 80% of obese adults have at least one and 40% have two or more comorbidities, which include diabetes, hyperlipidemia, hypertension, cardiovascular disease, gallbladder disease, osteoarthritis, and certain cancers (1, 2). The number of deaths directly attributable to obesity, approximately 300,000 annually in the United States, is second only to smoking in its contribution to total mortality rates (2). The direct and indirect costs of obesity have been estimated to account for 10% of the national health care budget. Thus, it is evident that obesity is a major medical and public health problem. Obesity results from storage of excess energy as fat during periods when energy intake exceeds energy expenditure. Our understanding of the specific mechanisms underlying the regulation of energy homeostasis has been greatly advanced by research that followed the discovery of leptin 5 yr ago (3‐5). Leptin, the product of the ob gene, is mainly produced by adipocytes, and its circulating levels reflect the amount of energy stored in adipose tissue (3‐5). Although body fat accounts for approximately 50 ‐ 60% of leptin’s variability, other factors such as age, gender, diurnal variation, and hormonal (mainly insulin) and cytokine levels also contribute to the regulation of leptin levels. Leptin acts by binding to specific receptors and activating the JAK STAT system for signal transduction (reviewed in Refs. 3 and 4). Leptin has pleiotropic actions, but its main target is considered to be the central nervous system. In the hypothalamus, leptin increases energy expenditure and inhibits appetite and weight gain by decreasing the expression of orexigenic neuropeptides such as NPY and AgRP, and by increasing the expression of anorexigenic neuropeptides such as a-MSH, CRH, and CART (reviewed in Refs. 3‐5). The discovery of leptin 5 yr ago triggered renewed enthusiasm for obesity research and has reinforced the view that obesity is a disease with strong biological basis. It has also accelerated research aimed at delineating the molecular pathways regulating energy homeostasis.
Evaluating<i>Pseudomonas aeruginosa</i>as plant growth-promoting rhizobacteria in West Africa (2006)

Abstract Some parameters of growth were examined in three test crops as indices of plant growth-promoting rhizobacteria (PGPR) ability of Pseudomonas aeruginosa. Crops include Abelmoschus esculentus L. (okra), Lycopersicon esculentum L. (tomato) and Amaranthus sp. (African spinach). This study aimed to examine the effectiveness of PGPR in West Africa and determine whether the inoculation method has an impact on PGPR's effectiveness. Bacterium was isolated from topsoil in the Botanical Garden, University of Lagos, Nigeria. Inoculation with bacteria was done by soaking seeds in 106 cfu/ml of bacterial suspension and coating was done using 10% starch (w/v) as seed adhesive with 106 cfu/ml of bacterial suspension. The third treatment involved soaking seeds in distilled water and later applying NPK 15:15:15 fertilizer. Control seeds were soaked in distilled water. Two methods of bacterial inoculation (soaking and coating) produced statistically similar results to plants grown with fertilizer but performed better than the control, suggesting a high potential of P. aeruginosa as PGPR.
Designing A Neural Network Structure For Transient Detection Using The Subspace Inhibition Filter Algorithm (2005)

In structuring a Multilayer Perceptron (MLP) Neural Network the order of the number of hidden nodes and the starting weights can greatly affect the net- work training and performance. For the transient detection problem, the Subspace Inhibition Filter Algorithm concepts are used to design the neural network with a small number of nodes in a single hidden layer and compute a starting point for the weight training. An algorithm is presented to calculate the minimum number of hidden nodes required and compute a good set of starting weights for the MLP. Simulation results show the feasibility of the algorithm and the improvements in training and performance for detecting transients.
Mechanochemical synthesis and annealing of tungsten di‐ and tetra‐boride (2019)

Abstract Tungsten diboride and tetra‐boride were synthesized by a combination of mechanochemical method and the subsequent heat treatment. To clarify the formation process of tungsten diboride (WB 2 ) and tetra‐boride (WB 4 ) using W‐B mixture system with variable B concentration, the effects of ball‐to‐powder ratio, W to B molar ratio on mechanochemical process were studied, and the relationship between phase composition and annealing temperature was built. The results show that, the synthesis of WB 2 with W:B = 1:5 can be improved by increasing ball‐to‐powder ratio from 4:1 to 6:1, but no WB 4 phase can be directly synthesized by mechanochemical method. WB 2 (AlB 2 ‐WB 2 , P6/mmm) phase can be only synthesized with W to B molar ratio of 1:4 and 1:5. Further increase in B content to W:B = 1:6 or less, W was present as the main phase with high crystallinity (>71%). WB 4 phase was formed as an annealing temperature as low as 1000°C, which was not stable and may decompose to WB 2 (WB 2 ‐WB 2 , P6/mmm) phase with the increase in temperature. The decomposition temperature of WB 4 can be improved by increasing the B content. Compared with the W‐B mixtures (W:B = 1:12) being milled for 1 hour, the powders milled for 40 hours present 20% higher of WB 4 weight fraction after being annealed at 1400°C for 2 hours.
A Framework for Efficient Adaptively Secure Composable Oblivious\n Transfer in the ROM (2017)

Oblivious Transfer (OT) is a fundamental cryptographic protocol that finds a\nnumber of applications, in particular, as an essential building block for\ntwo-party and multi-party computation. We construct a round-optimal (2 rounds)\nuniversally composable (UC) protocol for oblivious transfer secure against\nactive adaptive adversaries from any OW-CPA secure public-key encryption scheme\nwith certain properties in the random oracle model (ROM). In terms of\ncomputation, our protocol only requires the generation of a public/secret-key\npair, two encryption operations and one decryption operation, apart from a few\ncalls to the random oracle. In~terms of communication, our protocol only\nrequires the transfer of one public-key, two ciphertexts, and three binary\nstrings of roughly the same size as the message. Next, we show how to\ninstantiate our construction under the low noise LPN, McEliece, QC-MDPC, LWE,\nand CDH assumptions. Our instantiations based on the low noise LPN, McEliece,\nand QC-MDPC assumptions are the first UC-secure OT protocols based on coding\nassumptions to achieve: 1) adaptive security, 2) optimal round complexity, 3)\nlow communication and computational complexities. Previous results in this\nsetting only achieved static security and used costly cut-and-choose\ntechniques.Our instantiation based on CDH achieves adaptive security at the\nsmall cost of communicating only two more group elements as compared to the\ngap-DH based Simplest OT protocol of Chou and Orlandi (Latincrypt 15), which\nonly achieves static security in the ROM.\n
Enhanced Activity and Recyclability of Palladium Complexes in the Catalytic Synthesis of Sodium Acrylate from Carbon Dioxide and Ethylene (2016)

Abstract The Pd‐catalysed synthesis of sodium acrylate from ethylene and CO 2 in the presence of alcoholate bases has been improved significantly. We used amide solvents such as N ‐cyclohexylpyrrolidone or N , N ‐dibutylformamide to achieve turnover numbers greater than 500 in one run, which is significantly higher than that of systems for this reaction reported previously. For the first time, we were able to recycle the catalyst without any additional regeneration step. With this system, it is possible to use the simple and easily recycled alcoholate base sodium iso propoxide to achieve good turnover numbers up to 200.
The intravascular mass of albumin during human pregnancy: a serial study in normal and diabetic women (1993)

Rather than simply reflecting plasma volume dilution, the changes in serum albumin imply alterations in albumin metabolism during pregnancy.
Imaging with frequency-modulated reticles (1991)

A novel imaging technique in which frequency-modulated retides encode different pixel locations by light modulation is presented. In this technique a reticle modulates different pixel locations at different frequencies, and photodetectors collect the resulting signals. Filters decode these signals to recreate the image on a display. The technique allows multiplexing many pixels onto a fewer number of detectors by utilizing the bandwidth of the detectors more effectively. Since frequency modulation creates an additional dimension for the detector, a single detector can function as a linear array, a linear array can function as a staring array, or the additional dimension can be used to convey spectral or other information. At wavelengths requiring expensive focal plane components, costs can be greatly reduced.
Characterisation of explicit feedback in an online music recommendation service (2010)

In this paper, we present our study and characterisation of explicit and implicit feedback on Last.fm, an online music station and recommender service. The dataset consisted of explicit positive feedback (through loved tracks) and implicit positive feedback (the number of times a track is played). As one would expect, our analysis shows that explicit feedback is very scarce. However, we also found that the rate at which a user provides explicit feedback decreases with time, and that overall leaving explicit feedback has a negative effect on the user's behaviour.
Genetic-algorithm-based reliability optimization for computer network expansion (1995)

This paper explains the development and implementation of a new methodology for expanding existing computer networks. Expansion is achieved by adding new communication links and computer nodes such that reliability measures of the network are optimized within specified constraints. A genetic algorithm-based computer network expansion methodology (GANE) is developed to optimize a specified objective function (reliability measure) under a given set of network constraints. This technique is very powerful because the same approach can be extended to solve different types of problems; the only modification required is the objective function evaluation module. The versatility of the genetic algorithm is illustrated by applying it to solve various network expansion problems (optimize diameter, average distance and computer network reliability for network expansion). The results are compared with the optimal solutions computed using an exhaustive search of complete solution space. The results demonstrate that GANE is very effective (in both accuracy and computation time) and applies to a wide range of problems, but it does not guarantee the optimal results for every problem.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Splicing-independent recruitment of spliceosomal small nuclear RNPs to nascent RNA polymerase II transcripts (2007)

In amphibian oocytes, most lateral loops of the lampbrush chromosomes correspond to active transcriptional sites for RNA polymerase II. We show that newly assembled small nuclear ribonucleoprotein (RNP [snRNP]) particles, which are formed upon cytoplasmic injection of fluorescently labeled spliceosomal small nuclear RNAs (snRNAs), target the nascent transcripts of the chromosomal loops. With this new targeting assay, we demonstrate that nonfunctional forms of U1 and U2 snRNAs still associate with the active transcriptional units. In particular, we find that their association with nascent RNP fibrils is independent of their base pairing with pre-messenger RNAs. Additionally, stem loop I of the U1 snRNA is identified as a discrete domain that is both necessary and sufficient for association with nascent transcripts. Finally, in oocytes deficient in splicing, the recruitment of U1, U4, and U5 snRNPs to transcriptional units is not affected. Collectively, these data indicate that the recruitment of snRNPs to nascent transcripts and the assembly of the spliceosome are uncoupled events.
i3D: An Interactive System for Exploring Annotated 3D Environments (1995)

In this paper, we present I3D, a system that combines the 3D input and high-performance rendering capabilities of high-end virtual reality systems with the data fetching abilities of network browsers. Using a Spaceball, the user can intuitively navigate inside the three-dimensional data, while selecting 3D objects with the mouse triggers requests for access to remote media documents that can be text, still images, animations or even other 3D models. Time-critical rendering techniques allow the system to display complex 3D scenes at high and constant frame rates, making it possible to use it in the context of large scale projects. The system is currently being used at CERN as a visualization and data management tool for the design of the new Large Hadron Collider, and will be used at CRS4 in the networked educational system IPERLER. KEYWORDS Hypermedia, 3D Visualization, 3D Walkthrough, View-and-markup Tools. 1. INTRODUCTION With the existence of graphics workstations able to displa...
Significant discrepancies between van't Hoff and calorimetric enthalpies. (1995)

In this paper we show that the usual assumption in studies of the temperature variation of equilibrium constants for equilibria of the form A+B <-->AB that a plot of ln K vs. 1/T (K = equilibrium constant, T = temperature in degrees kelvin) is a straight line with slope equal to -delta HvH/R (delta HvH = van't Hoff or apparent enthalpy, R = gas constant) is not valid in many cases. In all the cases considered here, delta HvH is temperature dependent and is significantly different from the true or calorimetrically measured enthalpy, and the respective values for delta Cp are also significantly different.
Generation of Induced Pluripotent Stem (iPS) Cells by Nuclear Reprogramming (2011)

During embryonic development pluripotency is progressively lost irreversibly by cell division, differentiation, migration and organ formation. Terminally differentiated cells do not generate other kinds of cells. Pluripotent stem cells are a great source of varying cell types that are used for tissue regeneration or repair of damaged tissue. The pluripotent stem cells can be derived from inner cell mass of blastocyte but its application is limited due to ethical concerns. The recent discovery of iPS with defined reprogramming factors has initiated a flurry of works on stem cell in various laboratories. The pluripotent cells can be derived from various differentiated adult cells as well as from adult stem cells by nuclear reprogramming, somatic cell nuclear transfer etc. In this review article, different aspects of nuclear reprogramming are discussed.
A generalized criterion for rubber toughening: The critical matrix ligament thickness (1988)

Abstract The thickness of matrix ligament is shown to be the single parameter determining whether a polymer/rubber blend will be tough or brittle. The matrix ligament is defined as the region of the matrix between two neighboring rubber particles. Specifically, the ligament thickness is the surface‐to‐surface interparticle distance. When the average ligament thickness is smaller than a critical value, a blend will be tough; when greater, it will be brittle. In other words, a sharp brittle–tough transition occurs at the critical ligament thickness. This critical parameter is independent of rubber volume fraction and particle size, and is characteristic of the matrix for a given mode, temperature and rate of deformation. What is important is the matrix ligament, not rubber particles. The single matrix parameter explains the effects of phase morphology, rubber volume fraction, particle size, particle‐size polydispersity, and particle flocculation on toughness.
Compatability of Underwater Cables and Connectors (1976)

A survey of the pressure sealing characteristics of underwater electrical cables and components required for sealing to equipment is presented in terms of electrical and pressure sealing joints. Techniques for maximizing system reliability by obtaining redundant pressure seals and by minimizing the number of pressure and electrical joints presented. The qualitative comparision of reliability characteristics has been selected because of the current lack of comparative test data.