gebhart/patrepeval huggingface dataset:
ANALYSIS OF THE POST-BUCKLING BEHAVIOR OF STEEL COLUMNS (1988)

The post-buckling behavior of steel columns depends largely on the plasticity of the material which, before strain-hardening, exhibits a significant amount of plastic flow without any increase in stress. This results in zero tangent modulus of the material and therefore any column buckles immediately after it is compressed up to its yield strength and it then loses the stability. However, along with the post-buckling straining, the lost stability proves to be recovered to some extent or even completely. This is due of course to the subsequent strain-hardening effect, but this process is found to be highly history dependent and complex. This study is devoted to a refined analysis of this history dependent post-buckling behavior of steel columns. It is found from the present study that the buckling deformation of a very short column, or so called stub column, vanishes completely after some post-buckling straining, hence the column recovers subsequently the original straight configuration.
Estimation of total organic carbon and brittleness volume (2016)

Abstract The Barnett Shale in the Fort Worth Basin is one of the most important resource plays in the USA. The total organic carbon (TOC) and brittleness can help to characterize a resource play to assist in the search for sweet spots. Higher TOC or organic content are generally associated with hydrocarbon storage and with rocks that are ductile in nature. However, brittle rocks are more amenable to fracturing with the fractures faces more resistant to proppant embedment. Productive intervals within a resource play should therefore contain a judicious mix of organics and mineralogy that lends to hydraulic fracturing. Identification of these intervals through core acquisition and laboratory-based petrophysical measurements can be accurate but expensive in comparison with wireline logging. We have estimated TOC from wireline logs using Passey’s method and attained a correlation of 60%. However, errors in the baseline interpretation can lead to inaccurate TOC. Using nonlinear regression with Passey’s TOC, normalized stratigraphic height, and acquired wireline logs, the correlation increased to 80%. This regression can be applied to uncored wells with logs to estimate TOC, and we used it as a ground truth in integrated analysis of seismic and well log data. The brittleness index (BI) is computed based on core Fourier transform infrared mineralogy using Wang and Gale’s formula. The correlation between core BI and estimated BI using elastic logs (λρ, μρ, VP/VS, ZP, and ZS) combined with wireline logs was 78%. However, this correlation decreases to 66% if the BI is estimated using only wireline logs. Therefore, the later serves as a less reliable proxy. We have correlated production to volumetric estimate of TOC and brittleness by computing distance-weighted averages in 120 horizontal wells. We have obtained a production correlation of 38% on blind wells, which was encouraging, suggesting that the geologic component in completions provides an important contribution to well success.
Euclid mission status (2014)

In June 2012, Euclid, ESA's Cosmology mission was approved for implementation. Afterwards the industrial contracts were signed for the payload module and the spacecraft prime, and the mission requirements consolidated. We present the status of the mission in the light of the design solutions adopted by the contractors. The performances of the spacecraft in its operation, the telescope assembly, the scientific instruments as well as the data-processing have been carefully budgeted to meet the demanding scientific requirements. We give an overview of the system and where necessary the key items for the interfaces between the subsystems.
Design and Performance Test of Comb-Shaped Clamp/Spacer for Improvement of Recirculation Filter Efficacy in a Hard Disk Drive (2009)

With the recent increase of the rotational speed of hard disk drives, nanoparticle contamination can cause serious problems including thermal asperity. We designed a comb-shaped clamp and spacer to improve the efficacy of the recirculation filter in the operation of the hard disk drive (HDD). We calculated flow characteristics by a commercial computational fluid dynamics (CFD) code for six cases of the comb-shaped clamp and spacer. The calculation results showed that the outward velocity was the highest when the comb-shape angle was 45deg. We measured temporal variations of particle concentration during the operation of the HDD by experiments. Considering the decay rate and the percent clean-up of particle concentration, we found the case of 45deg to be the best design.
“Current thoughts” in electrosurgery (2007)

The ongoing desire to improve hemostasis and efficiency during surgery is manifested in the rapid development of electrosurgical technology. These changes have brought about a wide variety of devices available to the practicing surgeon during both open and endoscopic cases. Depending on the instrument chosen, various clinical effects ranging from simple coagulation to the sealing of large vascular bundles are obtained. However potential pitfalls or complications also exist. A thorough understanding of the pros and cons of these technological advancements can improve the operative experience for both surgeon and patient.
Efficacy, Safety, and Tolerability of Sertraline in Patients with Late‐Life Depression and Comorbid Medical Illness (2003)

Sertraline was efficacious in reducing depressive symptomatology, regardless of the presence of comorbid medical illness. Sertraline was safe and well tolerated by patients with or without medical illness.
Consul: a communication substrate for fault-tolerant distributed programs (1993)

Replicating important services on multiple processors in a distributed architecture is a common technique for constructing dependable computing systems. The authors describe a communication substrate, called Consul, that facilitates the development of such systems by providing a collection of fundamental abstractions for constructing fault-tolerant programs based on replicated processing. These abstractions include a multicast service, a membership service, and a recovery service. Consul is unique in two respects. First, its services are implemented using a collection of algorithms that exploit the partial (or causal) ordering of messages exchanged in the system. Such algorithms are generally more efficient than those that depend on a total ordering of events. Second, its underlying architecture is configurable, thereby allowing a system to be structured according to the needs of the application. The paper sketches Consul's architecture, presents the algorithms used by its protocols, and reports on the performance of an implementation using the x-kernel.
Nanostructured Electrocatalysts Degradation in PEM Fuel Cells: Key Role of the Electrochemical Interface in Engineering Practice (2009)

Abstract not Available.
Dispersion-enhanced photonic crystal fiber array for a true time-delay structured X-band phased array antenna (2004)

Tunable optical true time-delay modules based on highly dispersive photonic crystal fibers (PCFs) are demonstrated to provide continuous radio-frequency squint-free beam scanning for an X-band (8-12 GHz) phased array antenna system. The dispersion of the fabricated PCF is as high as -600 ps/nm /spl middot/ km at 1550 nm. The time delay is continuously tunable from -31 to 31 ps between adjacent delay lines by tuning the laser wavelength continuously from 1528 to 1560 nm. The far field radiation patterns of a 1/spl times/4 subarray were measured from -45/spl deg/ to 45/spl deg/ scanning angles. Squint-free operation is experimentally confirmed.
New Fabrication Method of Self-written Waveguide by Using Photosensitive Polyimide (2004)

A Photosensitive polyimide (PSPI) precursor for light-induced self-written (LISW) waveguide based on a poly(amic acid) (PAA) and 1,4-dihydropyridine derivatives (DHP)s has been developed. The PAA was prepared by ring-opening polyaddition of aromatic fluorinated tetracarboxylic dianhydrides and diamines. Upon exposing the PSPI precursor to laser light, a self-focusing effect induced by the difference in refractive index between the exposed and unexposed portions was observed. Thermal treatment of the laser exposed PSPI precursor gave a polyimide LISW wave guide with no other processing steps. The coupling loss between two multimode fibers with a 0.5 mm gap, was decreased from 5.2 dB in air to 0.7 dB by insertion of the PSPI LISW waveguide. This simple new fabrication method of LISW waveguide structures allows convenient and easy alignment of optical waveguide components.
ATG vs thiotepa with busulfan and cyclophosphamide in matched-related bone marrow transplantation for thalassemia (2017)

Matched-related bone marrow transplantation (BMT) may cure >80% of low-risk children with severe thalassemia (ST). Very long-term follow-up studies have shown how the standard busulfan-cyclophosphamide (BuCy) regimen may be associated with normalization of health-related quality of life, no second malignancies in the absence of chronic graft-versus-host disease, and fertility preservation in many patients. However, because BuCy may be associated with high rejection rates, some centers incorporate thiotepa (Tt) in busulfan- or treosulfan-based regimens, a combination that may increase the risk of permanent infertility. This study retrospectively compares matched-related BMT outcomes in 2 groups of low-risk ST patients conditioned with either Tt or anti-thymocyte globulin (ATG) in addition to BuCy. A total of 81 consecutive first BMTs were performed in 5 collaborating startup BMT centers in the Indian subcontinent between January 2009 and January 2016; 30 patients were transplanted after conditioning with Tt-BuCy between January 2009 and July 2013, whereas between August 2013 and January 2016, 51 patients received ATG-BuCy. All patients were <15 years and had no hepatomegaly (liver ≤2 cm from costal margin). Actuarial overall survival in the Tt-BuCy and ATG-BuCy groups was 87% and 94% and thalassemia-free survival was 80% and 85% at a median follow-up of 37 and 17 months, respectively, with no significant differences by log-rank statistics. Substituting Tt with ATG in the standard BuCy context seems safe and effective and may decrease transplant-related mortality. Higher fertility rates are expected for patients who received ATG-BuCy.
Conductor‐Backed Coplanar Waveguide (2001)

This chapter presents the characteristics of a coplanar waveguide with a lower ground plane. The lower ground plane provides mechanical strength for a thin and fragile wafer, such as GaAs, and acts as a heat sink for circuits with active devices. This configuration of the CPW is known as the conductor-backed coplanar waveguide (CBCPW). The chapter commences with expressions based on quasi-static analysis for the effective dielectric constant εeff and characteristic impedance Z0 of CBCPW with and without a top metal cover. Later sections of the chapter discuss the effect of conducting lateral walls on the dominant mode of the CBCPW and the effect of lateral electric and magnetic walls on the higher order mode propagation constant. A new variant of the CBCPW, namely the channelized coplanar waveguide (CCPW), is also presented.
Active capacitor multiplier in Miller-compensated circuits (2000)

A technique is presented whereby the compensating capacitor of an internally compensated linear regulator, Miller-compensated two-stage amplifier, is effectively multiplied. Increasing the capacitance with a current-mode multiplier allows the circuit to occupy less silicon area and to more effectively drive capacitive loads. Reducing physical area requirements while producing the same or perhaps better performance is especially useful in complex systems where most, if not all, functions are integrated onto a single integrated circuit. Die area in such systems is a luxury. The increasing demand for mobile battery-operated devices is a driving force toward higher integration. The enhanced Miller-compensation technique developed in this paper helps enable higher integration while being readily applicable to any process technology, be it CMOS, bipolar, or BiCMOS. Furthermore, the technique applies, in general, to amplifier circuits in feedback configuration. Experimentally, the integrated linear regulator (fabricated in a 1-/spl mu/m BiCMOS process technology) proved to be stable for a wide variety of loading conditions: load currents of up to 200 mA, equivalent series resistance of up to 3 /spl Omega/, and load capacitors ranging from 1.5 nF to 20 /spl mu/E The total quiescent current flowing through the regulator was less than 30 /spl mu/A during zero load-current conditions.
Epigenetic Regulation of MDR1 Gene in Breast Cancer CpG Methylation Status Dominates the Stable Maintenance of a Silent Gene (2004)

Commentary to:MDR1 Promoter Hypermethylation in MCF-7 Human Breast Cancer Cells Changes in Chromatin Structure Induced by Treatment with 5-Aza-CytidineGloria L. David, Srinivasan Yegnasubramanian, Arunima Kumar, Valerie L. Marchi, Angelo M. De Marzo, Xiaohui Lin and William G. Nelson
.sigma.-Hydrocarbyl-bridged gallium/zirconium complexes containing planar-tetracoordinate carbon (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT.sigma.-Hydrocarbyl-bridged gallium/zirconium complexes containing planar-tetracoordinate carbonGerhard Erker, Markus Albrecht, Carl Krueger, and Stefan WernerCite this: J. Am. Chem. Soc. 1992, 114, 22, 8531–8536Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 1992https://pubs.acs.org/doi/10.1021/ja00048a027https://doi.org/10.1021/ja00048a027research-articleACS PublicationsRequest reuse permissionsArticle Views180Altmetric-Citations52LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
FUNCTIONAL AND RADIOGRAPHIC OUTCOME OF SACROILIAC ARTHRODESIS FOR THE DISORDERS OF THE SACROILIAC JOINT (2008)

A prospective study was conducted to determine the functional and radiographic outcome of sacroiliac arthrodesis. Twenty patients were enrolled and the mean follow-up period was 4.6 years. SI joint instability was the most common etiology. Seventeen of twenty patients (85%) went on to a solid fusion. Statistically significant improvement was noted postoperatively in five of eight SF-36 categories (PF, RP, BP, SF, and RE), with a positive trend in the others. We conclude that sacroiliac arthrodesis is successful in the treatment of sacroiliac disorders, however its success is dependent on careful patient selection. The purpose of this study was to determine the functional and radiographic outcome of sacroiliac joint arthrodesis. Twenty consecutive patients were enrolled with an average age of 45.1 years. Plain radiographs and SF-36 Health Surveys were obtained prior to surgery and during the follow-up period. Mean duration of symptoms was 2.6 years and mean follow-up was 4.6 years. SI joint instability was the most common etiology and was present in twelve patients. Seventeen of Twenty (85%) patients went on to a solid fusion. Of the three patients who did not fuse, two remained symptomatic and required revision surgery. Fifteen of twenty patients (75%) completed pre- and post-operative SF-36 forms. Improvement was noted in all SF-36 categories. PF improved from 31.8±31.0 to 50.7±34.5 (p In this prospective study, a fusion rate of 85% was achieved, and statistically significant improvement in functional outcome was observed in five of eight SF-36 categories with a positive trend in the others. Sacroiliac arthrodesis is successful in the treatment of SI joint instability, arthritis, spondyloarthropathy, and dysfunction, however, its success is dependent on careful patient selection.
Data management issues in an AIDS research environment (2002)

Data management issues in an AIDS environment, where clinical laboratory and research data constantly interact to yield diagnostic and prognostic remits, are dependent on a number of critical issues. These issues can be categorized into several macro and micro issues. Some of the macro issues can be related to LANs (Local Area Networks), WANs (Wide Area Networks), database management, biomedical instrumentation support, biomedical computing support tools and so on. Many of the micro issues are hidden beneath an intricate network of clinical and laboratory tests. Algorithms and statistical procedures are necessary to monitor patient progress, because of the complexities associated with the disease's progression and the time required for HIV infection to go from HIV positive and the variability in time to convert to full-blown AIDS. These micro issues are often dynamic and evolve as the disease progresses over time. Biomedical computing support for AIDS management requires an integrated functioning of these micro and macro issues through efficient design. This paper describes the integrated functioning of decision support mechanisms with clinical and laboratory related data management, in support of AIDS clinical management. This state-of-the-art biomedical computing infrastructure at NJIMS/DAIID (New Jersey Medical School/Division of Allergy, Immunology, and Infectious Diseases), interacts with a number of local and distributed AIDS related clinical/research sites.
The Role of Alignment Layers on the Induced Relaxation of Passively Multiplexed Antiferroelectric Liquid Crystal Displays (2005)

ABSTRACT We have investigated the static and dynamic electrooptical effects of adding an alignment layer derived from a chiral liquid crystal having SmC* and N* phases to the standard polymer alignment layer in antiferroelectric liquid crystal cells. Our results show that the added layer reduces the relaxation time of the liquid crystal, the threshold voltage and the dynamic range required to generate a full greyscale. The electrooptical response of materials was tested using a 7 level waveform, and the relaxation was studied using a novel memory test.
Experimental myasthenia due to alpha‐bungarotoxin (1976)

Neuromuscular transmission was studied electrophysiologically in rabbits intoxicated by alpha-bungarotoxin, a specific inhibitor of acetylcholine receptor. The findings consisted of a slight reduction in amplitude of single evoked muscle action potentials, a decrement in amplitude of successive evoked muscle action potentials post-tetanic potentiation and exhaustion, edrophonium reversal, and no change of muscle action potentials evoked by direct stimulation of the muscle. These were similar to characteristic electrophysiologic phenomena seen in 40 patients with myasthenia gravis. The receptor abnormality may be responsible for the underlying defect of myasthenia.
Multiple capsid-stabilizing interactions revealed in a high-resolution structure of an emerging picornavirus causing neonatal sepsis (2016)

The poorly studied picornavirus, human parechovirus 3 (HPeV3) causes neonatal sepsis with no therapies available. Our 4.3-Å resolution structure of HPeV3 on its own and at 15 Å resolution in complex with human monoclonal antibody Fabs demonstrates the expected picornavirus capsid structure with three distinct features. First, 25% of the HPeV3 RNA genome in 60 sites is highly ordered as confirmed by asymmetric reconstruction, and interacts with conserved regions of the capsid proteins VP1 and VP3. Second, the VP0 N terminus stabilizes the capsid inner surface, in contrast to other picornaviruses where on expulsion as VP4, it forms an RNA translocation channel. Last, VP1's hydrophobic pocket, the binding site for the antipicornaviral drug, pleconaril, is blocked and thus inappropriate for antiviral development. Together, these results suggest a direction for development of neutralizing antibodies, antiviral drugs based on targeting the RNA-protein interactions and dissection of virus assembly on the basis of RNA nucleation.
A visualization of the MIT City Scanning Project (1999)

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, September 1998.
Effects of acid-base changes and carbonic anhydrase inhibition on pancreatic secretion (1963)

Pancreatic flow and HCO 3 – and Cl – output were studied in dogs following 2 U/kg (i.v.) of secretin. Acetazolamide reduced flow and HCO 3 – output to half normal. HCl produced the same effect. NaHCO 3 increased flow and HCO 3 – output. CO 2 produced little change. Severe hyperventilation decreased flow and HCO 3 – output. Results are consistent with secretion dependent on the over-all reaction OH – + CO 2 → HCO 3 – , with both a carbonic-anhydrase catalyzed and an uncatalyzed component. Reduction of either reactant or of enzyme decreased output: increase of the reactants increased output. From in vitro kinetics and analysis of rates in vivo, the role of carbonic anhydrase may be assessed. About half of HCO 3 – output normally depends on the uncatalyzed reaction, and half on the catalyzed. In metabolic alterations, only the uncatalyzed component is affected. Pancreatic carbonic anhydrase is greatly in excess of that needed for the observed catalyzed rate in vivo. Correspondingly, reduction of output by acetazolamide occurs only when &gt;99% of pancreatic carbonic anhydrase is inhibited. It is suggested that the rate-limiting event in pancreatic HCO 3 – secretion is transport of HCO 3 – from cell to duct.
ISOLATION OF ADENOSINE AMINO ACID ESTERS FROM A RIBONUCLEASE DIGEST OF SOLUBLE, LIVER RIBONUCLEIC ACID (1958)

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
A research of thermal coupling model for lithium-ion battery under low-temperature conditions (2017)

Electrochemical models and equivalent circuit models have been the most common choices for simulation of the performance of lithium-ion battery. However, most models do not consider the temperature effect on the battery parameters, which leads to large simulation error when battery is under subzero operation conditions. Actually, low ambient temperature operation condition is inevitable for EVs and HEVs in cold-climate of some regions. Fundamentally, low-temperature conditions lead to a slowdown of the chemical reactions, affecting the charge-transfer kinetics and leading to low electrolyte conductivity and a decreased diffusivity of lithium ions within the negative-potential electrode(anode). In this paper, the relationship between temperature-dependent parameters and temperature at low temperatures was established. An improved model based on electrochemical-thermal coupling model (ETCM) was proposed to accurately simulate battery performance. Experimental data and the simulation of a battery proved that the proposed model can precisely simulate the battery performance at low temperatures. The results obtained in this paper are quite useful for battery management system.