gebhart/patrepeval huggingface dataset:
Organosulfur derivatives of the metal carbonyls. XIV. Reactions of trifluoromethylthiosilver with certain norbornadiene- and tetraphenylcyclobutadienemetal complexes (1971)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganosulfur derivatives of the metal carbonyls. XIV. Reactions of trifluoromethylthiosilver with certain norbornadiene- and tetraphenylcyclobutadienemetal complexesR. B. King and A. EfratyCite this: Inorg. Chem. 1971, 10, 7, 1376–1379Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://doi.org/10.1021/ic50101a011Request reuse permissionsArticle Views58Altmetric-Citations20LEARN 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 InReddit PDF (497 KB) Get e-Alertsclose Get e-Alerts
Posterior Vitreous Detachment in Normal Healthy Subjects Younger Than Age Twenty (2021)

PVD can be observed by OCT to begin in the first and second decade of life. It begins in the mid-peripheral vitreous, most frequently in the superior quadrants anterior to the vascular arcades. In this study, all PVDs originated outside of the macular liquefied lacunae, where the vitreous gel adheres directly to the retina.
Multicentric dermal-type cylindromas of the parotid glands in a patient with florid turban tumor (1977)

Dermal-type cylindromas of parotid glands in a patient with turban tumor, and various adnexal tumors, represent a rare diathesis, apparently not reported previously. A Caucasian man, born in 1916, had a scalpectomy for turban tumor in 1957. In 1957, 1960, and 1974, dermal type cylindromas were excised from portions of both parotid glands, developing from intercalated and striated ducts; they were considered benign, based on long term followup. Adrexal tumors included multiple dermal cylindromas, trichoepitheliomas, eccrine spiradenomas, and Bowen's disease, and occurred on almost all skin surfaces. In November, 1976, a portion of a right parotidectomy included a 3.5 X 3-cm malignant tumor having the characteristics of an invasive poorly differentiated spindle cell epidermoid carcinoma, which showed no evidence of originating from a malignant basal cell tumor. Several encapsulated and developing benign basal cell tumors were included in the specimen. Dermal-type cyclindromas of the parotid gland are considered to be a variant of basal cell ademona, or monomorphic adenoma, basal cell type, since they consist of similar cell components, although of somewhat different arrangement and with prominent focal deposition of hyaline. Dermal-type cylindromas should be excised conservatively as they appear. They must be differentiated from adenoid cystic carcinoma, which is an infiltrating neoplasm and requires a radical surgical approach.
Approaching MIMO-OFDM Capacity with Per Antenna Power and Rate Feedback (2006)

For block fading channls, the delay-limited capacity measures the maximum constant-rate achievable over all fading blocks under the availability of complete channel knowledge at both the transmitter and the receiver. In this paper, we consider constant-rate transmissions over MIMO-OFDM block fading channels, under the condition that the channel is known at the receiver but unknown at the transmitter. We consider the well-known V-BLAST architecture that employs independently encoded data for each transmit antenna and present a closedloop extension of V-BLAST whereby the receiver jointly optimizes the rate and power assignments for each transmit antenna and then informs them to the transmitter via a low-rate feedback channel. Simulation results have confirmed that the closed-loop V-BLAST architecture can approach closely the channel delaylimited capacity if a capacity-achieving scalar code is used at each transmit antenna.
Magnetic resonance imaging in ischaemic accidents of the brain stem. (1989)

Seven cases of ischaemic accident affecting the brain stem are reported. There were two lacunar infarctions and five infarctions due to occlusion of major arteries (two lateral medullary infarctions, one pontine infarction and two thalamo-mesencephalic infarctions). In every case the abnormalities detected at MRI were concordant with the clinical findings. The authors underline the value of MRI in establishing clinico-topographic correlations in vivo and in differentiating lacunar infarctions from infarctions due to stenosis of major arteries in the vertebro-basilar system.
A depth-decreasing heuristic for combinational logic (1990)

This paper describes a heuristic for speeding up combinational logic by decreasing the logic depth, at the expense of a minimal increase in circuit size. The heuristic iteratively speeds up sections of the critical path by the use of Shannon factorization on the late input. This procedure is empirically found to be capable of reproducing or even beating several classic global optimizations: a chain of an associative operator is transformed into a tree, a ripple prefix circuit into a parallel prefix circuit, and a ripple-carry adder into a slightly smaller and faster circuit than the carry-lookahead adder.
Quantifying Brain Iron in Hereditary Hemochromatosis Using R2* and Susceptibility Mapping (2022)

Both quantitative susceptibility mapping and R2* showed abnormal levels of brain iron in subjects with hereditary hemochromatosis compared with controls. Quantitative susceptibility mapping and R2* can be acquired in a single MR imaging sequence and are complementary in quantifying deep gray matter iron.
Enhancing Orthopedic Implant Bioactivity: Refining the Nanotopography (2015)

Advances in nanotechnology open up new possibilities to produce biomimetic surfaces that resemble the cell in vivo growth environment at a nanoscale level. Nanotopographical changes of biomaterials surfaces can positively impact the bioactivity and ossointegration properties of orthopedic and dental implants. This review introduces nanofabrication techniques currently used or those with high potential for use as surface modification of biomedical implants. The interactions of nanotopography with water, proteins and cells are also discussed, as they largely determine the final success of the implants. Due to the well-documented effects of surface chemistry and microtopography on the bioactivity of the implant, we here elaborate on the ability of the nanofabrication techniques to combine the dual (multi) modification of surface chemistry and/or microtopography.
Averaging sphere for ultraviolet, visible, and near infrared wavelengths: a highly effective design (1976)

Through the use of an efficient design and a newly available sphere coating material, a simple, passive, sturdy averaging sphere was made that operates effectively over the wavelength range from 200 nm to 2000 nm. Data are reported for a sphere of this type in which the sphere transmittance is 0.32 at 200 nm and rises rapidly to near the maximum theoretical value of 0.56 over the remainder of the wavelength range. The several orders of magnitude reduction in error due to beam displacement more than compensate the slight reduction in signal for many spectrophotometric and radiometric applications.
Inactivation of ribonuclease and other enzymes by peroxidizing lipids and by malonaldehyde (1969)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInactivation of ribonuclease and other enzymes by peroxidizing lipids and by malonaldehydeK. S. Chio and Aloys L. TappelCite this: Biochemistry 1969, 8, 7, 2827–2832Publication Date (Print):July 1, 1969Publication History Published online1 May 2002Published inissue 1 July 1969https://pubs.acs.org/doi/10.1021/bi00835a020https://doi.org/10.1021/bi00835a020research-articleACS PublicationsRequest reuse permissionsArticle Views251Altmetric-Citations311LEARN 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-Alertsclose Get e-Alerts
Characterization and tribology of PEG‐like coatings on UHMWPE for total hip replacements (2009)

A crosslinked hydrogel coating similar to poly(ethylene glycol) (PEG) was covalently bonded to the surface of ultrahigh molecular weight polyethylene (UHMWPE) to improve the lubricity and wear resistance of the UHWMPE for use in total joint replacements. The chemistry, hydrophilicity, and protein adsorption resistance of the coatings were determined, and the wear behavior of the PEG-like coating was examined by two methods: pin-on-disk tribometry to evaluate macroscale behavior, and atomic force microscopy (AFM) to simulate asperity wear. As expected, the coating was found to be highly PEG-like, with approximately 83% ether content by x-ray photoelectron spectroscopy and more hydrophilic and resistant to protein adsorption than uncoated UHMWPE. Pin-on-disk testing showed that the PEG-like coating could survive 3 MPa of contact pressure, comparable to that experienced by total hip replacements. AFM nanoscratching experiments uncovered three damage mechanisms for the coatings: adhesion/microfracture, pure adhesion, and delamination. The latter two mechanisms appear to correlate well with wear patterns induced by pin-on-disk testing and evaluated by attenuated total reflection Fourier transform infrared spectroscopy mapping. Understanding the mechanisms by which the PEG-like coatings wear is critical for improving the behavior of subsequent generations of wear-resistant hydrogel coatings.
Generative modeling (1992)

This paperdiscusaes a new, symbolic approach to geometric modeling called generative modeling. Tbc approach allows specification, rendering, and maiysis of a wide variety of ahapes including 3D curves, strrfaees, and solids, as well as higfrer-dimenaionsd shapes such as surfaces deforming in time, and volumes with a spatially varying mass &nsity. The system also supports powerful operations on shapes such as '"repammeterize this curve by arclengtb", "compute the volume, center of mass, and moments of inertia of the solid bounded by these surfaces", or "solve this constraint or ODE system". The system haa been used for a wide variety of applications, including creating surfaces for computer graphics animations, modeling the fur and body shape of a teddy bear, constructing 3D solid models of elastic bodies, and extracting surfaces from magnetic resonance (MR) data. Shapes in the system are specified using a language which builds mtrkidimerrsiorralparametric functions. Tbc Imgustgc is baaed on a set of symbolic operators on continuous, pieccwise differentiable parametric functions. We present several shape examples to show bow conveniently shapes can be specified in the system. We also discuss tbe kinds of operators useful in a geometric modeling system, including arithmetic operators, vector and matrix operators, imegration, differentiation, constraint solution, and constrained minimisation. Associated with each operator are several methmta, which compute proprties about the parametric functions represented with the operxom. We show how marrypowerful rendering and snafyricsf operations can be supported with only three methods: evahsation of the parametric function at a point, symbolic dlffererrtiation of the parametric function, md evacuation of artinclusion function for the parametric function.
ChemInform Abstract: RESEARCH ON TUMOR INHIBITING COMPOUNDS. PART LVII. NUCLEOPHILIC AROMATIC SUBSTITUTION IN 1‐NITRO‐7‐BROMO‐9‐ACRIDONE AND OTHER BROMOACRIDONES (1977)

Abstract Bei Reaktion des aus dem Acridon (I) erhältlichen Bromderivats (II) mit K‐amid in flüssigem Ammoniak werden neben dem Ausgangsstoff (II) und dem Produkt der Reduktion (I) die isomeren Aminoacridone (III) isoliert, deren Bildungsmechanismus diskutiert wird.
Analysis of turbine generator steady‐state reactances for load conditions (1998)

This paper describes variations of turbine generator steady-state reactances for load conditions. When the turbine generator is of small size, magnetic saturation of the stator and rotor core is a problem. Therefore, it is important to understand the variations of the reactances for load conditions. The reactances of a 592-MVA turbine generator are calculated with d- and q-axis equations considering magnetic saturation and two-dimensional numerical magnetic field analysis. The results are as follows. (1) The equivalent synchronous reactances considering cross-magnetizing are smaller than the original synchronous reactances for load conditions. (2) Numerical values of the d- and q-axis mutual reactance and the field and q-axis mutual reactance are at their maximum when the d-axis linkage flux is nearly equal to the q-axis linkage flux under constant voltage. (3) The d-axis synchronous reactance drops with increasing reactive power under constant voltage and active power, but the q-axis synchronous reactance increases. (4) The variation of the equivalent d-axis synchronous reactance with increasing reactive power is similar to that of the d-axis synchronous reactance, but the variation of the equivalent q-axis synchronous reactance is different from that of the q-axis synchronous reactance. © 1998 Scripta Technica. Electr Eng Jpn, 123(3): 73–83, 1998
Evaluation of the anticoagulant potential of polysaccharide-rich fractions extracted from macroalgae (2017)

The aim of this study was to evaluate the potential anticoagulant activity of sulphated polysaccharide-containing extracts of six french edible marine macroalgae. Aqueous extracts of brown (Himanthalia elongata, Laminaria digitata, Ascophyllum nodosum, Fucus vesiculosus), green (Ulva lactuca) and red (Chondrus crispus) macroalgae were prepared and their biochemical properties were determined, including major biomolecules, sulphate and ash contents. The anticoagulant activity of each extract was investigated using different scales from the specific antithrombin-dependent pathway (anti-Xa and anti-IIa) to the intrinsic and/or common (Activated Partial Thromboplastin Time, APTT), extrinsic (Prothrombin Time, PT) or common (Thrombin Time, TT) anticoagulant pathways, and compared with those of commercial anticoagulants, heparin and Lovenox®. Laminaria digitata, Fucus vesiculosus and Chondrus crispus extracts showed a significant APTT anticoagulant capacity, only 5-fold lower than that of Lovenox®, which is a pure low molecular weight heparin used as an anticoagulant agent to prevent pulmonary embolism in patients undergoing surgery.
Equivalent impedance of a large rough surface at low grazing angles (2004)

The parabolic equation technique has been widely used in the study of wave propagation over smooth earth and inhomogeneous atmosphere. To properly account for surface roughness in the parabolic equation formulation has been the goal of many propagation researchers lately. The behavior of average equivalent impedance at low grazing angles is investigated here for a large rough surface. We numerically solve a Volterra integral equation of the second kind to predict fields over a rough surface through a spectral acceleration algorithm. The equivalent impedance (or admittance) of the rough surface is then calculated by comparing the resulting normalized field to the field of a two-ray model over a constant impedance plane.
Intensity‐modulated radiotherapy with an integrated boost to the macroscopic tumor volume in the treatment of high‐grade gliomas (2001)

Integrated boost radiotherapy (IBRT) delivers a higher fraction size to the gross tumor volume and a conventional fraction size to the surrounding tissue of microscopic spread. We compared stereotactic conformal radiotherapy (SCRT) and intensity-modulated radiotherapy (IMRT) with regard to their suitability for IBRT in the treatment of high-grade gliomas. In 20 patients treated with conventional radiotherapy, an additional treatment plan for IBRT [planning target volume (PTV1) defined as contrast-enhancing lesion plus margin due to setup errors 75 Gy, PTV2 defined as edema plus margin due to microscopic spread and setup error 60 Gy] with 7 non-coplanar beams for IMRT and for SCRT was carried out and compared. The part of the PTV2 irradiated with more than 107% of the prescribed dose was 13.9% for IMRT and 30.9% for SCRT (P < 0.001). Dose coverage of PTV2 (volume above 95% of the prescribed dose) was improved with IMRT (88.4% vs. 75.3% with SCRT, P < 0.001). Dose coverage of PTV1 was slightly higher with SCRT (93.7% vs. 87.5% with IMRT), but the conformity to the boost shape was improved by IMRT [conformity index (COIN95) = 0.85 vs. 0.69 with SCRT]. Simultaneously the brain volume irradiated with > 50 Gy was reduced from 60 to 33 cc (P < 0.001). We conclude that IMRT is suitable for local dose escalation in the enhancing lesion and for delivering a homogeneous dose to the PTV2 outside the PTV1 at the same time. Our encouraging results justify application of IMRT for IBRT in the treatment of high-grade gliomas. For clinical evaluation a phase III study has been initiated.
Homology Models of Coronavirus 2019-nCoV 3CLpro Protease (2020)

A regional outbreak of pneumonia in Wuhan, Hubei Province of China in late 2019 was associated with a novel coronavirus. Rapid release of genomic data for the isolated virus enabled the construction of first-generation homology models of the new CoV 3CL&lt;sup&gt;pro&lt;/sup&gt; cysteine protease. Whilst the overall viral genome was most closely associated with bat coronaviruses, the main protease is most closely related (96% identity) to SARS CoV protease.
Empirical verification of fault models for FPGAs operating in the subcritical voltage region (2013)

We present a rigorous empirical study of the bit-level error behavior of field programmable gate arrays operating in the subcricital voltage region. This region is of significant interest as voltage-scaling under normal circumstances is halted by the first occurrence of errors. However, accurate fault models might provide insight that would allow subcritical scaling by changing digital design practices or by simply accepting errors if possible. To facilitate further work in this direction, we present probabilistic error models that allow us to link error behavior with statistical properties of the binary signals, and based on a two-FPGA setup we experimentally verify the correctness of candidate models. For all experiments, the observed error rates exhibit a polynomial dependency on outcome probability of the binary inputs, which corresponds to the behavior predicted by the proposed timing error model. Furthermore, our results show that the fault mechanism is fully deterministic — mimicking temporary stuck-at errors. As a result, given knowledge about a given signal, errors are fully predictable in the subcritical voltage region.
Human Skin Irritation Studies of a Lecithin Microemulsion Gel and of Lecithin Liposomes (1996)

Soybean lecithin microemulsion gels offer promising features for the possible use as matrices in transdermal therapeutic systems. In order to assess the skin irritancy potential of the gel, acute and cumulative irriation tests were performed in human subjects in vivo using as comparison an unilamellar soybean lecithin liposome preparation and the solvent isopropyl palmitate (IPP). Acute irritation was tested in 151 volunteers in a 48-hour patch test, whereas cumulative irritation was assessed in a 21-day human repeated insult patch test in 20 volunteers. In the acute irritation test, discrete irritation (erythema only) developed with the gel in 2 subjects (1.3%), with the liposomes in 3 subjects (2.0%), and with IPP in 2 subjects (1.3%). For the assessment of cumulative irritation, the IT50 (irritation time of 50% of the test population) was calculated. IT50 was 13 days for the gel, 14 days for the liposomes and 17 days for IPP. This study shows a very low acute and a low cumulative irritancy potential for the soybean lecithin microemulsion gel making it a candidate matrix for transdermal therapeutic systems also under toxicological aspects.
ChemInform Abstract: TOTAL SYNTHESIS OF RACEMIC 12‐METHYLPROSTAGLANDINS (1977)

Abstract Aus dem Bromketon (I) werden zunächst die Epimerengemische (VI) und (X) dargestellt, von denen letzteres aufgetrennt wird.
Sorting Carbon Nanotubes for Electronics (2008)

Because of their unique structure and composition, single-wall carbon nanotubes (SWNTs) are at the interface between molecules and crystalline solids. They also present properties that are ideal for making lightweight, inexpensive, and flexible electronics. The raw material is composed of a heterogeneous mixture of SWNTs that differ in helicity and diameter and, therefore, requires purification and separation. In a series of groundbreaking experiments, a robust process serving this purpose was developed based on SWNTs encapsulated in surfactants and water. Ultracentrifugation in a density gradient combined with surfactant mixtures provided buoyant density differences, enabling enrichment for both diameter and electronic properties. A new paper in this issue explores further the process through the hydrodynamic properties of SWNT-surfactant complexes. The study reveals that we have just begun to uncover the dynamics and properties of nanotube-surfactant interactions and highlights the potential that could be gained from a better understanding of their chemistry. The time scale of integration of carbon nanotubes into electronics applications remains unclear, but the recent developments in sorting out SWNTs paves the way for improving on the properties of network-based SWNTs.
Single-chip receiver front-end for 79GHz automotive radar (2011)

A 79GHz receiver front-end for automotive applications has been implemented in a 130nm SiGe technology supporting millimeter wave design. The receiver consists of a two-stage LNA, a double-balanced down-conversion Mixer and a synchronized VCO. Design and test results for each RF circuit block are presented, followed by a characterization of the integrated receiver.
Electron Probe Microanalysis of Li K-alpha with Newly Developed Ultra-Soft X-ray Spectrometer (2006)

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006