gebhart/patrepeval huggingface dataset:
Multiphase Finite Element Modeling of Machining Unidirectional Composites: Prediction of Debonding and Fiber Damage (2008)

A multiphase finite element model using the commercial finite element package ABAQUS/EXPLICIT is developed for simulating the orthogonal machining of unidirectional fiber reinforced composite materials. The composite materials considered for this study are a glass fiber reinforced epoxy and a tube formed carbon fiber reinforced epoxy. The effects of varying the fiber orientation angle and tool rake angle on the cutting force and damage during machining are considered for the glass fiber reinforced epoxy. In the case of carbon fiber reinforced epoxy, only the effect of fiber orientation on the measured cutting force and damage during machining is considered. Two major damage phenomena are predicted: debonding at the fiber-matrix interface and fiber pullout. In the multiphase approach, the fiber and matrix are modeled as continuum elements with isotropic properties separated by an interfacial layer, while the tool is modeled as a rigid body. The cohesive zone modeling approach is used for the interfacial layer to simulate the extent of debonding below the work surface. Bulk deformation and shear failure are considered in the matrix for both the models and the glass fiber. A brittle failure criterion is used for the carbon fiber specimen and is coded in FORTRAN as a user defined material (VUMAT). The brittle failure of the carbon fibers is modeled using the Marigo model for brittle failure. For validation purposes, simulation results of the multiphase approach are compared with experimental measurements of the cutting force and damage. The model is successful in predicting cutting forces and damage at the front and rear faces with respect to the fiber orientation. A successful prediction of fiber pullout is also demonstrated in this paper.
Heavier smoking may lead to a relative increase in waist circumference: evidence for a causal relationship from a Mendelian randomisation meta-analysis. The CARTA consortium (2015)

For a given BMI, a gene variant associated with increased cigarette consumption was associated with increased waist circumference. Smoking in an effort to control weight may lead to accumulation of central adiposity.
Aberrant expression of CD30 in aggressive systemic mastocytosis and mast cell leukemia: a differential diagnosis to consider in aggressive hematopoietic CD30-positive neoplasms (2011)

During the past two decades the immunophenotype of normal, reactive, and neoplastic mast cells (MCs) has been established. These studies have convincingly demonstrated that MCs form a separate lineage within the myeloid cell family. A most intriguing finding was that in contrast to normal MCs, neoplastic MCs in systemic mastocytosis (SM) aberrantly express several lymphoid marker antigens such as CD2 and CD25. This phenomenon has now been topped by the unexpected observation that neoplastic MCs in aggressive variants of SM and MC leukemia (leukemic variant of SM) aberrantly express CD30, whereas this antigen, Ki-1, is not detectable or is expressed only weakly in MCs in most patients with indolent SM. These observations may have implications for the evolution of SM as well as for diagnostic evaluation and grading in these patients. Moreover, these observations suggest that advanced SM has to be considered as a differential diagnosis of CD30-positive lymphoid neoplasms. Finally, CD30 may be considered as a potential target of antibody-based therapeutic intervention in advanced mast cell disorders.
Ground fault analysis of low voltage DC micro-grids with active front-end converter (2014)

When a converter is used to interface an ac distribution system and a low voltage (LV) dc micro-grid, several combined options for ac and for dc grounding can be used. According to the selected grounding scheme, zero-sequence dc or high frequency currents may flow in specific sections of the circuit. These, in turn, can cause EMC issues, unwanted protection trips and other problems. In the present article a dc micro-grid in which the neutral point of the MV/LV transformer is directly grounded and the dc micro-grid is floating (i.e., there is no grounding connection) is analysed. When a ground fault occurs, potentially harmful fault currents flow through the front-end converter, depending on the fault resistance and on the load conditions. The methodology proposed in this work protects the front-end converter while the task of feeding the dc-side loads is committed to storage systems. The calculation of the minimum fault resistance that the front-end converter can tolerate is provided and the effectiveness of the proposed methodology is tested by means of numerical simulations.
The deposition characteristics of copper(I) compounds for CVD by FT-IR spectroscopy (1991)

Fourier transform-infrared spectroscopy (FT-IR) was used to investigate the adsorption and thermally-induced decomposition of copper (I) {beta}-diketonate precursors of the type (hfac)CuL, where hfac is the hexafluoroacetylacetonate bidentate ligand and L is trimethylphosphine or 1,5-cyclooctadiene. The (hfac)CuPMe{sub 3} precursor desorbs from the surface at very low temperatures whereas the (hfac)Cu(1,5-COD) dissociates on adsorption, liberating 1,5-COD and leaving a surface(hfac)Cu complex which can subsequently disproportionate. Evidence is provided for hydrogen-bonding between the hfac ligand and the surface silanols for (hfac)CuPMe{sub 3}, but not for (hfac)Cu(1,5-COD). These results are consistent with the selective behavior of these precursors for copper deposition and suggest that the selectivity of the (hfac)CuPMe{sub 3} and (hfac)Cu(1, 5-COD) precursors may be due to the ability of the hfac ligand to hydrogen bond to the surface silanol groups.
<title>Digital rights management for digital cinema</title> (2001)

There is a wide consensus among the feature film production studios that the Internet era brings a new paradigm for film distribution to cinemas worldwide. The benefits of digital cinema to both producers and cinemas are numerous: significantly lower distribution and maintenance costs, immediate access to film libraries, higher presentation quality, and strong potential for developing new business models. Despite these advantages, the studios are still reluctant to jump into the digital age. The main showstopper for digital cinema is the danger of widespread piracy. Piracy already costs Hollywood an estimated two billion dollars annually and digital cinema without proper copyright enforcement could increase this number. In this paper, we present a copyright management system that aims at providing the set of necessary security tools: standard cryptographic primitives and copyright protection mechanisms that enable a reliable and secure feature film delivery system.
De Novo Parallel Design, Synthesis and Evaluation of Inhibitors against the Reverse Transcriptase of Human Immunodeficiency Virus Type-1 and Drug-Resistant Variants. (2007)

ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionDeNovo Parallel Design, Synthesis and Evaluation of Inhibitors against the Reverse Transcriptase of Human Immunodeficiency Virus Type-1 and Drug-Resistant Variants.Alon Herschhorn, Lena Lerman, Michal Weitman, Iris Oz Gleenberg, Abraham Nudelman, and Amnon HiziCite this: J. Med. Chem. 2007, 50, 14, 3402Publication Date (Web):June 19, 2007Publication History Published online19 June 2007Published inissue 1 July 2007https://pubs.acs.org/doi/10.1021/jm070617shttps://doi.org/10.1021/jm070617scorrectionACS PublicationsCopyright © 2007 American Chemical Society. This publication is available under these Terms of Use. Request reuse permissions This publication is free to access through this site. Learn MoreArticle Views455Altmetric-Citations1LEARN 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 PDF (6 KB) Get e-Alertsclose Get e-Alerts
Organometallic model complexes elucidate the active gallium species in alkane dehydrogenation catalysts based on ligand effects in Ga K-edge XANES (2016)

Ga(<sc>iii</sc>)-alkyl and alkoxide model compounds demonstrate XANES edge energy shifts similar to those in Ga dehydrogenation catalysts without a change in Ga oxidation state.
The Robot Has No Role in Elective Colon Surgery (2013)

Our website uses cookies to enhance your experience. By continuing to use our site, or clicking "Continue," you are agreeing to our Cookie Policy | Continue JAMA Surgery HomeNew OnlineCurrent IssueFor Authors Podcast Publications JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry (1919-1959) JN Learning / CMESubscribeJobsInstitutions / LibrariansReprints & Permissions Terms of Use | Privacy Policy | Accessibility Statement 2023 American Medical Association. All Rights Reserved Search All JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Forum Archive JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry Input Search Term Sign In Individual Sign In Sign inCreate an Account Access through your institution Sign In Purchase Options: Buy this article Rent this article Subscribe to the JAMA Surgery journal
HIV-1 infection induces retrotransposition of LINE-1 elements (2009)

Author(s): Jones, R Brad; Garrison, Keith E; Song, Haihan; Buzdin, Anton; Anwar, Naveed; Meiklejohn, Duncan A; Ndhlovu, Lishomwa C; Nixon, Douglas F; Ostrowski, Mario A
Advanced method for increasing the efficiency of white light quantum dot LEDs (2011)

Abstract Covering a light‐emitting diode (LED) with quantum dots (QDs) can produce a broad spectrum of white light. However, current techniques for applying QDs to LEDs suffer from a high density of defects and a non‐uniform distribution of QDs, which, respectively, diminish the efficiency and quality of emitted light. Oak Ridge National Laboratory (ORNL) has the unique capability to thermally anneal QD structures at extremely high power densities for very short durations. This process, called pulse thermal processing (PTP), reduces the number of point defects while maintaining the size and shape of the original QD nanostructure. Therefore, the efficiency of the QD wavelength conversion layer is improved without altering the emission spectrum defined by the size distribution of the QD nanoparticles. The current research uses a thermal model to predict annealing temperatures during PTP and demonstrates up to a 300% increase in photoluminescence for QDs on passive substrates.
Zaragozic Acid A/Squalestatin S1: Synthetic and Retrosynthetic Studies (1994)

Step by step the first total synthesis was approached: of the zaragozic acids/ squalestatins showing potential therapeutic value for lowering the serum cholesterol concentration, zaragozic acid A/squalestatin SI (1), the most abundant member of a new class of naturally occurring products, has now been synthesized via the key intermediates 2 and 3. Initially the projected final sequence (2 → 1) was achieved, and the side chains attached to C1 and C6 were prepared through efficient asymmetric syntheses. The first synthesis of the highly oxygenated “core”, which is characteristic of this class of natural products, was achieved from a simple prochiral diene via intermediate 3. Finally the synthetic route 3 → 2 was developed to successfully complete the total synthesis. Bn  benzyl, PMB  para-methoxybenzyl, TMS  trimethylsilyl.
Volatile Compounds Affecting the Aroma of Vitis vinifera L. cv. Scheurebe (1998)

Typical Scheurebe wines are characterized by a fruity aroma, which is described as redcurrant-like, often with a grapefruit note. In 1995 Darriet et al. identified 4-mercapto-4-methylpentan-2-one (MMP), responsible for the distinctive odor of box tree and cat urine (1). The perception threshold of this compound in wine has been reported to be very low (3 ng/l). Recent studies by Guth and coworkers (2) showed that MMP also significantly influences the aroma of Scheurebe wines. Sulfur compounds occur naturally in wines in very low concentrations, but play an important role in the determination of the flavor and aroma of the wine. The aim of the present study was the isolation and identification of new flavor compounds from Scheurebe wine at trace level. For enrichment purposes preparative multidimensional gas chromatography (MDGC) was used. The structure elucidation of the isolated compounds was on the basis of spectroscopic methods (NMR, GCFTIR, GC-MS) and synthesis as well. The sensory properties of the isolated compounds were correlated with the typical aroma profile of Scheurebe wines.
Superantigen and HLA-DR ligation induce phospholipase-C gamma 1 activation in class II+ T cells (1992)

Bacterial enterotoxin superantigens bind directly to HLA class II molecules (HLA-DR) expressed on both APC and activated human T cells, and simultaneously bind to certain V beta chains of the TCR. In this report, we compared early T cell signaling events in human alloantigen-stimulated T cells when activated by HLA-DR ligation through antibody cross-linking or by direct enterotoxin superantigen binding. Both types of stimuli induced tyrosine phosphorylation of phosphatidylinositol-specific phospholipase C gamma 1 (PLC gamma 1) and an increase in intracellular calcium concentration; however, superantigen-induced signaling was stronger than class II ligation alone. Antibody-mediated ligation of HLA-DR with CD3 resulted in augmented PLC gamma 1 activation and increased calcium mobilization, consistent with a mechanism of superantigen activity through a combination of class II and CD3/Ti signals. In addition, down-modulation of CD3 receptors with antibody demonstrated that superantigen-induced signaling events were CD3-dependent. Superantigen signaling was also class II-dependent, in that resting T cells were not responsive to direct enterotoxin stimulation. To address how early signal transducing activity correlated with T cell responsiveness, alloantigen-primed T cells were activated with immobilized class II-specific mAb or soluble superantigen. Both HLA-DR mAb-stimulated T cells and enterotoxin-treated T cells proliferated strongly in response to co-stimulation by a combination of CD28 receptor engagement and PMA addition. In addition, superantigen-induced growth was induced by CD28 receptor ligation with antibody or the B7 counter-receptor expressed on Chinese hamster ovary cells. Taken together, these results indicate that class II molecules expressed on activated T cells are directly coupled to the PLC gamma 1 signal transduction pathway, and that coligation of HLA-DR with CD3 augments T cell signaling comparable to that induced by enterotoxin superantigen. Thus, we suggest that superantigen-induced early signaling responses in activated T cells may be due in part to class II transmembrane signals induced when HLA-DR and V beta are ligated in cis.
Demo: Making Batteries a First Class Element in the Design and Evaluation of Embedded Wireless Systems (2017)

We present a suite of measurement and simulation tools for studying the behavior of non-rechargeable Li-coin cells. These tools will lead to improvements in the design and evaluation of battery-dependent embedded wireless systems.
Direct observation of 1,2-didehydronaphthalene in a low temperature argon matrix: consecutive photolysis of 1,2-naphthalenedicarboxylic anhydride (1999)

1,2-Didehydronaphthalene (1-naphthyne) was produced in a low temperature argon matrix by wavelength-selective photolysis of 1,2-naphthalenedicarboxylic anhydride, which was confirmed by comparison of its FTIR spectrum with the theoretical IR spectrum calculated by density functional theory.
Left Ventricular Filling Dynamics: Particle Image Velocimetry and Ultrasound Color M-Mode Imaging (2001)

Abstract Studies have shown that left ventricular diastolic function is an important indicator of overall cardiac health [1,2]. Quantitation of diastolic function using non-invasive imaging techniques continues to be a long-standing goal for clinicians. The recent development of ultrasound Doppler color M-mode imaging techniques to measure the speed of flow propagation within the ventricle during diastole appears promising in this regard. However, significant subjectivity in measuring flow propagation speed exists. One reason for this is that the relationship between clinically derived parameters such as color M-mode flow propagation and underlying fluid mechanics of diastolic filling is still unclear.
Wave - Guide Fresnel Lighting System KIER - UBC 2002 Model Design and Analysis (2002)

Recent attempts have been taken to combine a solar concentrating system with a prism light guide luminaire to compose a solar powered lighting system. The results yielded have shown the design unable to adapt to the various input angles the sun creates throughout the day. A new design approach will be proposed in this paper, along with a computer analysis as a basis of comparison. The problem that this system attempts to solve is the shortening of the focal length in a rectangular Fresnel lens by allowing the lens component to shift and accommodate for this change. To insure the light transformer can remain stationary, a flexible silicone wave-guide is used to accept various altitude shits that might occur do to the non-stationary Fresnel lens.
Perovskite Quantum Dots and Their Application in Light‐Emitting Diodes (2017)

Perovskite quantum dots (PQDs) attract significant interest in recent years because of their unique optical properties, such as tunable wavelength, narrow emission, and high photoluminescence quantum efficiency (PLQY). Recent studies report new types of formamidinium (FA) PbBr<sub>3</sub> PQDs, PQDs with organic-inorganic mixed cations, divalent cation doped colloidal CsPb<sub>1-</sub><sub>x</sub> M<sub>x</sub> Br<sub>3</sub> PQDs (M = Sn<sup>2+</sup> , Cd<sup>2+</sup> , Zn<sup>2+</sup> , Mn<sup>2+</sup> ) featuring partial cation exchange, and heterovalent cation doped into PQDs (Bi<sup>3+</sup> ). These PQD analogs open new possibilities for optoelectronic devices. For commercial applications in lighting and backlight displays, stability of PQDs requires further improvement to prevent their degradation by temperature, oxygen, moisture, and light. Oxygen and moisture-facilitated ion migration may easily etch unstable PQDs. Easy ion migration may result in crystal growth, which lowers PLQY of PQDs. Surface coating and treatment are important procedures for overcoming such factors. In this study, new types of PQDs and a strategy of improving their stabilities are introduced. Finally, this paper discusses future applications of PQDs in light-emitting diodes.
Influence des conditions d’essais sur les données tribologiques (2001)

Plusieurs essais cooperatifs multilaboratoires ont ete effectues en 1997, 1998, 1999, 2000 et 2001 par le groupe de travail DIN 51834 “Essais tribologiques dans l’appareil translation-oscillation”. Il s’agit d’essais effectues sur des machines differentes et dans differents lieux. Pour simplifier, on les denomme “essais circulaires”. L’analyse statistique des resultats a examine l’influence du choix du solvant, du modele de l’appareil et des parametres sur les caracteristiques tribologiques des differentes huiles. Le coefficient de frottement et les taux d’usure peuvent etre classes selon les dix differents solvants utilises: l’isopropanol donne des coefficients de frottement plutot bas et l’isoparaffine des coefficients plutot eleves. La variation du coefficient de frottement selon le modele de machine se situe entre 0,2 % et 0,9 % et les taux d’usure ne sont pas non plus affectes par les solvants. Le diametre de l’empreinte est insuffisant pour caracteriser la resistance a l’usure d’une huile. Le critere pour l’adhesion a du etre redefini. La repetabilite et la reproductibilite ont ete ameliorees.
A planar-type oxygen sensor using NAFION thick film. (1990)

固体電解質酸素センサーの小型化・簡素化のため,H+型NAFION(プロトン導電体)を用いた・対極を分離しない次のような平面型セルを構成し,常温作動型センサーとしての応答特性について検討した。Au(対極)| NAFION(固体電解質)|Pt(検知極)本素子の起電力および短絡電流は,25℃ において従来の対極分離型素子と同様塗応答を示した。すなわち,検知極側では次のような電極反応が起こってしいると考えられる。O2 + H+ + e-=HO2したがって,この平面型センサーでは対極への参照ガスの導入や対極分離の必要はなく・また短絡電流を検知信号とする場合には,外部電圧印加のための電源も必要としないため素子の小型化・簡素化・および集積化が可能である。さらに,本素子では電極上での最終電解生成物は水であるので・被検ガス.雰囲気を加湿することで応答僑号に対する電解生成物の影響を取り除くことも可能である。
Three-dimensional photonic crystals based on III-V semiconductor at 1-2 μm wavelengths (2003)

Photonic crystal is a new type of optical material in which the refractive index changes periodically. By utilizing the photonic band gap and the defect states introduced artificially, novel scientific and engineering applications are expected such as complete control of spontaneous emission, a zero-threshold semiconductor laser, and very sharp bending of light. To extract the potential of photonic crystals as much as possible, the following requirements should be satisfied. (1) The crystals should have complete photonic band gap at optical wavelengths. (2) The introduction of an arbitrary defect state into the crystal should be possible. (3) The introduction of a high efficient light-emitter also should be possible. (4) Current flow through the crystals should be possible to excite the light-emitter electrically. Thus far, there have been very few reports on the complete photonic crystals which satisfy all the above requirements simultaneously. In this presentation, we report a complete three-dimensional photonic crystal based on III-V semiconductors, which potentially satisfies all the above requirements, in 1 to 2 /spl mu/m wavelength region. It is shown that the crystal has a complete photonic band gap with a record shortest wavelength and largest band gap effect ever reported.
Stereochemical Factors in Epoxide Polymerization by Base and Coordination Catalysts (1973)

Abstract The amorphous fraction accompanying isotactic poly (propy-lene oxide) or poly(tert-butylethylene oxide) formed by co-ordination catalysts was shown by degradation to the dimer glycols to involve inversion of configuration at every ring opening at the secondary carbon atom for (R) - [or (S) -] PO and to involve no stereoselection in the coordination step for tert-BuEO. The crystalline poly(tert-BuEO) formed by polymerization with tert-BuOK was similarly shown to give equal amounts of erythro and threo dimer glycol. It is proposed that these dimer units arise from regular alternate isotactic and syndiotactic placements (iso,syn). Aryl glycidyl
Development of 5G System Evaluation Tool (2018)

We developed an evaluation tool that evaluates the system performance of fifth generation mobile communication systems that use multi-antenna technologies such as massive MIMO and beamforming that compensate for the increase in path loss due to high frequency usage in various areas based on computer simulation. The tool calculates propagation characteristics utilizing ray-tracing and the SINR/throughput based on the Shannon capacity using the obtained propagation characteristics. This report describes the tool functions and presents evaluation results.