gebhart/patrepeval huggingface dataset:
Dish-Stirling Systems: An Overview of Development and Status (2003)

Dish-Stirling systems have demonstrated the highest efficiency of any solar power generation system by converting nearly 30% of direct-normal incident solar radiation into electricity after accounting for parasitic power losses[1]. These high-performance, solar power systems have been in development for two decades with the primary focus in recent years on reducing the capital and operating costs of systems. Even though the systems currently cost about $10,000 US/kW installed, major cost reduction will occur with mass production and further development of the systems. Substantial progress has been made to improve reliability thereby reducing the operating and maintenance costs of the systems. As capital costs drop to about $3000 US/kW, promising market opportunities appear to be developing in green power and distributed generation markets in the southwestern United States and in Europe. In this paper, we review the current status of four Dish-Stirling systems that are being developed for commercial markets and present system specifications and review system performance and cost data. We also review the economics, capital cost, operating and maintenance costs, and the emerging markets for Dish-Stirling systems.
In-situ monitoring of hybrid friction diffusion bonded EN AW 1050/EN CW 004A lap joints using artificial neural nets (2020)

In this work, a dissimilar copper/aluminum lap joint was generated by force-controlled hybrid friction diffusion bonding setup (HFDB). During the welding process, the appearing torque, the welding force as well as the plunge depth are recorded over time. Due to the force-controlled process, tool wear and the use of different materials, the resulting data series varies significantly, which makes quality assurance according to classical methods very difficult. Therefore, a Convolutional Neural Network was developed which allows the evaluation of the recorded process data. In this study, data from sound welds as well as data from samples with weld defects were considered. In addition to the different welding qualities, deviations from the ideal conditions due to tool wear and the use of different alloys were also considered. The validity of the developed approach is determined by cross validation during the training process and different amounts of training data. With an accuracy of 88.5%, the approach of using Convolutional Neural Network has proven to be a suitable tool for monitoring the processes.
Benefits of a Closely-Spaced Satellite Constellation of Atmospheric Polarimetric Radio Occultation Measurements (2019)

The climate and weather forecast predictive capability for precipitation intensity is limited by gaps in the understanding of basic cloud-convective processes. Currently, a better understanding of the cloud-convective process lacks observational constraints, due to the difficulty in obtaining accurate, vertically resolved pressure, temperature, and water vapor structure inside and near convective clouds. This manuscript describes the potential advantages of collecting sequential radio occultation (RO) observations from a constellation of closely spaced low Earth-orbiting satellites. In this configuration, the RO tangent points tend to cluster together, such that successive RO ray paths are sampling independent air mass quantities as the ray paths lie “parallel” to one another. When the RO train orbits near a region of precipitation, there is a probability that one or more of the RO ray paths will intersect the region of heavy precipitation, and one or more would lie outside. The presence of heavy precipitation can be discerned by the use of the polarimetric RO (PRO) technique recently demonstrated by the Radio Occultations through Heavy Precipitation (ROHP) receiver onboard the Spanish PAZ spacecraft. This sampling strategy provides unique, near-simultaneous observations of the water vapor profile inside and in the environment surrounding heavy precipitation, which are not possible from current RO data.
Use of Antimicrobial Growth Promoters in Food Animals and Enterococcus faecium Resistance to Therapeutic Antimicrobial Drugs in Europe (1999)

Supplementing animal feed with antimicrobial agents to enhance growth has been common practice for more than 30 years and is estimated to constitute more than half the total antimicrobial use worldwide. The potential public health consequences of this use have been debated; however, until recently, clear evidence of a health risk was not available. Accumulating evidence now indicates that the use of the glycopeptide avoparcin as a growth promoter has created in food animals a major reservoir of Enterococcus faecium, which contains the high level glycopeptide resistance determinant vanA, located on the Tn1546 transposon. Furthermore, glycopeptide-resistant strains, as well as resistance determinants, can be transmitted from animals to humans. Two antimicrobial classes expected to provide the future therapeutic options for treatment of infections with vancomycin-resistant enterococci have analogues among the growth promoters, and a huge animal reservoir of resistant E. faecium has already been created, posing a new public health problem.
Deep ocean mineral water accelerates recovery from physical fatigue (2013)

Our results provide compelling evidence that DOM contains soluble elements, which can increase human recovery following an exhaustive physical challenge.
Motion Control System for Industrial Scenarios Based on Electromagnetic Encoders (2023)

In this paper, a complete system useful for the measurement of the absolute position, velocity, and acceleration of moving objects in industrial scenarios (such as conveyor transport devices, elevators, escalators, and other mechanical systems) is presented. The proposed system contains an electromagnetic encoder consisting of a pair of chains of metallic patches screen-printed on a rubber belt. In one of the chains (designated as clock/velocity chain), the patches are printed at predefined periodic positions. Such clock chain generates also the clock signal necessary to read the other chain (position chain), with patches either present (binary state ‘1’) or absent (binary state ‘0’) at their predefined positions. The system includes a reader based on a transmission line with three resonators etched on the ground plane and fed with three harmonic signals. Such three elements are complementary split ring resonators (CSRRs), which are sensitive to the presence of patches at short distance on top of them, and therefore they are used to detect the patches as the encoder moves with regard to the reader. By encoder motion, the patches generate three amplitude modulation (AM) signals, providing the velocity (and acceleration), the absolute encoder position, and the motion direction. A prototype system, including the encoder, the reader and the associated electronics is designed, fabricated and validated.
A new set of high speed matrix addressing schemes for ferroelectric liquid crystal displays (1993)

Abstract A new set of matrix addressing schemes for ferroelectric liquid crystal displays is reported. The schemes use the minimum in the response time-voltage characteristic found in certain mixtures and deliver improved operating speed and contrast ratio compared with previously reported schemes operating in this mode.
Políticas de inclusión educativa en Chile: Tres nudos críticos (2018)

Habiendo logrado los desafíos de cobertura tras políticas de obligatoriedad y un sistema de financiamiento vía subvención a la demanda condicionada a la matrícula y asistencia, pero enfrentado al escenario de la segregación escolar, Chile ha decidido abrazar el sueño de una educación inclusiva y de calidad. En este artículo identificamos y analizamos tres nudos críticos que afectan las posibilidades de movilizarse hacia una educación inclusiva de calidad: a) una tensión entre la lógica de la integración e inclusión educativa, b) un modelo basado en el mercado que no considera los valores públicos, y c) una nueva arquitectura educacional, basada en la lógica de la rendición de cuentas individual, que coloca la posibilidad de mejoramiento educativo en sistemas de incentivos individuales atados al logro de pruebas de alto rendimiento. Discutimos la necesidad de abordar y destrabar estos nudos desde la investigación transdisciplinaria.
Designing a Combinatorial Financial Options Market (2021)

Financial options are contracts that specify the right to buy or sell an underlying asset at a strike price by an expiration date. Standard exchanges offer options of predetermined strike values and trade options of different strikes independently, even for those written on the same underlying asset. Such independent market design can introduce arbitrage opportunities and lead to the thin market problem. The paper first proposes a mechanism that consolidates and matches orders on standard options related to the same underlying asset, while providing agents the flexibility to specify any custom strike value. The mechanism generalizes the classic double auction, runs in time polynomial to the number of orders, and poses no risk to the exchange, regardless of the value of the underlying asset at expiration. Empirical analysis on real-market options data shows that the mechanism can find new matches for options of different strike prices and reduce bid-ask spreads. Extending standard options written on a single asset, we propose and define a new derivative instrument -- combinatorial financial options that offer contract holders the right to buy or sell any linear combination of multiple underlying assets. We generalize our single-asset mechanism to match options written on different combinations of assets, and prove that optimal clearing of combinatorial financial options is coNP-hard. To facilitate market operations, we propose an algorithm that finds the exact optimal match through iterative constraint generation, and evaluate its performance on synthetically generated combinatorial options markets of different scales. As option prices reveal the market's collective belief of an underlying asset's future value, a combinatorial options market enables the expression of aggregate belief about future correlations among assets.
Nonlinear Dynamical Behavior of the Deep White Matter during Head Impact (2019)

Traumatic brain injury (TBI) is a major public health concern, affecting as many as 3 million people each year in the U.S. Despite substantial research efforts in recent years, our physical understanding of the cause of injury remains rather limited. In this paper, we characterize the nonlinear dynamical behavior of the brain-skull system through modal analysis and advanced finite-element (FE) simulations. We observe nonlinear behavior in the deep-white-matter (WM) structures near the dural folds, with an energy redistribution of around 30% between the dominant modes. We find evidence of shear-wave redirection near the falx and the tentorium (approximately 15 degrees in the axial and 8 degrees in the coronal plane) as a result of geometric nonlinearities. The shift in the falx mode shape, which is perpendicular to the deformation of the brain, causes geometrical nonlinear effects at the falx-brain tissue boundary. This is accompanied by a lateral sliding of the tentorium below the brain tissue, which induces higher local strains at its interface with deep regions of the brain. We observe that deep regions of the brain with high principal strains coincide with the identified nonlinear regions. The onset of nonlinear behavior in brain tissue is closely associated with the previously reported concussion thresholds, suggesting a possible link between the damage mechanism and the underlying nonlinear brain biomechanics.
Security across Disparate Management Domains in Coalition MANETs (2010)

Designing a coalition network for chaotic environments (e.g., responding to a large catastrophe) is challenging because such systems cannot rely on availability of a fixed communication or a security infrastructure. In such situations, a coalition may use Mobile Ad-hoc NETworks (MANETs) to communicate and to extend its operational reach and tempo. In this scenario, bootstrapping security and networking protocols requires that networking protocols cannot assume full existence of operational security protocols and vice-versa. In this chapter, the authors outline a realistic bounded resource adversary model and examine bootstrapping problems in the physical &amp; link layer and the routing layer with the goal of identifying new research challenges and novel solution methodologies. In particular, (i) the authors examine secure link key set up protocols at the physical &amp; link layer that neither use computationally intensive PKI mechanisms nor assume pre-configured shared keys between nodes that belong to different coalition partners, (ii) identify new security issues owing to power saving intra-domain routing protocols that use sophisticated packet matching and forwarding mechanisms; in a coalition setting they also examine inter-domain routing protocols that preserve domain autonomy and yet permits scalable network monitoring and misbehavior detection, (iii) examine identity management issues in MANETs and outline a wireless fingerprinting approach to condone a malicious node from spoofing and forging one or more identities on the network.
Internet Printing Protocol/1.0: Implementer's Guide (1999)

This document is one of a set of documents, which together describe all aspects of a new Internet Printing Protocol (IPP). IPP is an application level protocol that can be used for distributed printing using Internet tools and technologies. This document contains information that supplements the IPP Model and Semantics [RFC2566] and the IPP Transport and Encoding [RFC2565] documents. It is intended to help implementers understand IPP/1.0 and some of the considerations that may assist them in the design of their client and/or IPP object implementations. For example, a typical order of processing requests is given, including error checking. Motivation for some of the specification decisions is also included.
Energy Efficiency Maximization for CoMP Joint Transmission with Non-Ideal Power Amplifiers (2018)

Coordinated multipoint (CoMP) joint transmission (JT) can save a great deal of energy especially for cell-edge users due to strengthened received signal, but at the cost of deploying and coordinating cooperative nodes, which degrades energy efficiency (EE), particularly when considerable amount of energy is consumed by nonideal hardware circuit. In this paper, we study energyefficient cooperation establishment, including cooperative nodes selection (CNS) and power allocation, to satisfy a required data rate in coherent JT-CoMP networks with non-ideal power amplifiers (PAs) and circuit power. The selection priority lemma is proved first, and then the formulated discrete combinatorial EE optimization is resolved by proposing node selection criterion and deriving closedform expressions of optimal transmission power. Therefore, an efficient algorithm is provided and its superiority is validated by Monte Carlo simulations, which also show the effects of non-ideal PA and the data rate demand on EE and optimal number of active nodes.
Osteosclerotic sarcoidosis of spine and pelvis: plain film and magnetic resonance imaging findings (1994)

Abstract The purpose of this report is to present the plain film and magnetic resonance imaging features in an unusual case of histologically-confirmed sarcoidosis involving the pelvis and spine.
Selective thromboxane synthetase inhibitors. 3. 1H-Imidazol-1-yl-substituted benzo[b]furan-, benzo[b]thiophene- and indole-2- and 3-carboxylic acids (1986)

The preparation of a series of 1H-imidazol-1-yl-substituted benzo[b]furan-, benzo[b]thiophene-, and indolecarboxylic acids is described. Most of the compounds were potent inhibitors of TxA2 synthetase in vitro, and the distance between the imidazole and carboxylic acid groups was found to be important for optimal potency. The most potent compound in vivo was 6-(1H-imidazol-1-ylmethyl)-3-methylbenzo[b]thiophene-2-carboxylic acid (71), which, in conscious dogs, showed a similar profile of activity to that of dazoxiben (1).
Clusterin expression in primary and metastatic melanoma (2006)

Clusterin is a pleiotrophic glycoprotein that has been implicated in diverse physiologic processes. Recent studies of gene expression profiling found clusterin to be expressed in desmoplastic variants of malignant melanoma. In this study, we extended those observations and examined clusterin expression in a larger number of primary as well as in metastatic melanomas and melanocytic nevi. We used tissue microarray panels as well as selected conventional sections from formalin-fixed and paraffin-embedded tissue blocks. Positive staining for clusterin was found in seven of 21 (30%) primary desmoplastic and three of 21 (7%) non-desmoplastic melanoma. Among metastatic tumors, clusterin expression was found in five of 37 tumors (13.5%). Clusterin expression was not seen in melanocytes of normal skin or in any of the 10 melanocytic nevi tested. Clusterin expression was not entirely restricted to melanoma; it was also seen in a few non-neoplastic tissues, including perifollicular fibroblasts, occasional sebocytes, and the epithelial cells lining sebaceous duct and the isthmus of the hair follicle. Our findings confirm the observation that clusterin can be expressed in melanoma, in particular primary desmoplastic melanoma. However, clusterin appears to be present only in a minority of melanomas.
Modeling of Hydrate Blockage in Gas-Dominated Systems (2016)

Field experience indicates that hydrates formed in pipelines/wellbore may result in severe conduit blockage and other safety problems in oil/gas development. For gas-dominated systems, one key step to address the hydrate problems is the coupling of multiphase flow and hydrate behavior (formation, deposition, etc.), which has not been well studied so far. In this paper, a hydro-thermo-hydrate coupling model for a gas-dominated system is developed by considering the interactions between multiphase flow and hydrate occurrence which is described as layer growth from hydrate deposition on the wall. The accuracy and reliability of the proposed model have been verified with field and literature data. By using the new model, hydrate formation and deposition during deepwater gas well testing operations are simulated. For a typical deepwater gas well (water depth ∼1500 m, gas production rate ∼50 × 104 m3/d, liquid holdup ∼3%, without inhibitors), it takes 30 or more hours for hydrates to block the testing tubing. The hydrate blockage can be significantly promoted by the presence of a free water phase and postponed by the injection of inhibitors. The proposed model makes it possible to predict when and where hydrate blockage will occur in the tubing during a deepwater gas well testing. This work adds further insights into characterizing the interactions of the complicated systems and provides guidance for hydrate management optimization.
Effects of an Inhibitor of Nitric Oxide Synthesis on Skin Wound Repair (2005)

Considering that nitric oxide (NO) plays an important role on cutaneous wound repair, but its effects have not been defined, an inhibitor of NO synthesis (LNAME) was used. Control group received free water and LNAME group received LNAME (20 mg/kg/day) in drinking water. A full‐thickness excisional wound was performed (0d), and the animals were sacrificed 7, 14, and 21 days later. Wound contraction was evaluated by lesion surface measurement at 0d, 7d, 14d, and 21d. The blood pressure of all rats was measured in the beginning and at the each time point of the experiment with a plethysmography method. The wound and normal skin surrounding was formol fixed and paraffin embedded. To evaluate the vessels, an immunohistochemistry for α‐smooth muscle actin was done and stereological parameters were estimated in superficial and deep dermis. At 7d, 14d, and 21d the blood pressure of LNAME group was higher compared with control group (p &lt; 0.001 for all). The wound contraction of LNAME group was slower compared with control group at 14d and 21d (p = 0.004 for both). In superficial dermis, vessels were more dilated in control group compared with LNAME group at 14d and 21d (p = 0.02; p &lt; 0.0001, respectively) and longer in control group compared with LNAME group at 7d and 14d (p = 0.043; p = 0.002, respectively). Deep dermal vessels were more prominent and dilated in control group compared with LNAME group at 21d (p = 0.003; p = 0.0007, respectively), but at 7d, vessels were more dilated in LNAME group compared with control group (p = 0.015). In deep dermis, vessels were longer in control group compared with LNAME group at 14d and 21d (p = 0.002; p = 0.046, respectively). Our results show that nitric oxide inhibition affects the wound contraction and the vascularization pattern, mainly in the later phases of skin wound repair.
Design of a Charge-Pump Type AC-DC Converter for RE-ID Tags (2006)

In this paper, a charge-pump type AC-DC converter for RF ID tags is proposed. Since the proposed converter employing novel bootstrap circuits can avoid the threshold voltage drop caused by diode-switches, it can achieve an AC-DC conversion at high efficiency. The SPICE simulations showed that the power efficiency of the proposed converter is more than 85% and the electric power is about 5 mW when an output load is 500Omega. Furthermore, the characteristics concerning power efficiency and ripple voltage are analyzed theoretically
Specificity of antibodies directed against Env protein of human endogenous retroviruses in patients with germ cell tumors. (1996)

We report here that 85% of the patients with germ cell tumors (GCTs) produce antibodies directed against Env protein of human endogenous retroviruses. Individuals that received antitumor treatment showed a decrease with time in their antibody titers. Importantly, of the rare cases of non-GCT individuals with Env-antibodies (n= 15, 0.8%), none produced antibodies directed against the transmembrane domain (TM), whereas all tested Env-positive GCT patients (n= 49) generated such antibodies at high titers. TM is required for Env to be expressed at the cell surface. Thus, anti-TM antibodies constitute highly specific markers for GCT and may hint at a function of Env during tumorigenesis.
[Cerebral imaging and depressive disorder]. (1988)

Cerebral imaging of depressive syndromes has been studied since the early eighties in search of organic or functional anomalies in the central nervous system. There are fewer studies than with schizophrenia. Computed tomography, scintiscan, positron emission tomography (PET) are being used in various depressive states. For methodological reasons, results with PET are only preliminary. EEG mapping, a new technique, has, above all, measured the abnormalities of organic brain syndromes, especially dementia, which has to be ruled out in the diagnosis of depression. CT scan has not substantiated any cerebral defects in depressed patients in the comparative case-control studies, except for some clinical types (aged population or forms associated with delusional or hallucinatory syndromes) where images of cortico-subcortical atrophy have been observed. Scintiscan and PET scan have shown a decreased cerebral blood flow, with a Xenon 133 test, and PET scan a decreased consumption of glucose on condition that depressed subjects are cognitively resting, in comparison to matched controls. In EEG mapping an index of spacetiation of the basal quantitative EEG activity typifies cases of evolution towards dementia, which has to be ruled out in the diagnosis of involutional depression.