gebhart/patrepeval huggingface dataset:
Microwave modulated and thermal modulated photoluminescence studies of 2H-lead iodide (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrowave modulated and thermal modulated photoluminescence studies of 2H-lead iodideE. Lifshitz and L. BykovCite this: J. Phys. Chem. 1993, 97, 37, 9288–9292Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.acs.org/doi/10.1021/j100139a006https://doi.org/10.1021/j100139a006research-articleACS PublicationsRequest reuse permissionsArticle Views111Altmetric-Citations14LEARN 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 options Get e-Alerts
Analysis of Wear Track on DLC Coatings after Sliding with MoDTC-Containing Lubricants (2017)

Wear of DLC coating has been great concern in DLC/Steel sliding surface lubricated by molybdenum dithiocarbamate (MoDTC) containing lubricants. However, in order to design lubrication system with DLC and MoDTC, the mechanism of this issue is needed to be clarified. In this study, the roller-on-disc oscillation friction test by SRV friction tester was conducted to provide the hypothesis about the mechanism of wear of DLC with MoDTC. In friction test, DLC coatings (a-C:H and ta-C) were coated on discs. Counterpart was the SUJ2 bearing steel roller. It was found that MoDTC in lubricants accelerated the wear of the both two DLC coatings and it was dramatic especially for a-C:H coating. In order to clarify the enhancement mechanism of MoDTC for wear of DLC coatings, the surface analysis on DLC coatings and steel roller was conducted with XPS (X-ray Photoelectron Spectroscopy) and surface profile meter. As a result, sp2 ratio increased layer was observed on the a-C:H coating with XPS and the surface roughness of wear track was larger than out of wear track after sliding with MoDTC containing lubricant. On the other hand, ta-C did not show the increasing of sp2 ratio and the surface roughness of wear track decreased after sliding with and without MoDTC containing lubricant. For both DLC coatings, tribofilm generated from MoDTC was also observed on the counter SUJ2 roller surface with XPS. Depth profile of chemical elements of the tribofilm on the steel roller with XPS contributed to clarify the distribution of Molybdenum compound as MoO3 and Mo2C. Top surface was MoO3 and the interface between the SUJ2 roller and tribfilm was Mo2C. The authors provide the hypothetical model about a tribo-chemical reaction between both DLC coatings as ta-C or a-C:H and tribofilm from MoDTC.
A Bilateral Compliance Control for Time Delayed Systems (2006)

When the bilateral control system has a time delay between the slave system and the control system, the compliance control performance is likely to be deteriorated. This paper proposed a bilateral compliance control scheme and a controller design method for the bilateral control systems with a time delay. The slave controller has a modified type of Smith predictor for the time delay in each input and output stage of an open loop unstable plant. The compliance controller is implemented by a first order low pass filter and it modifies the position of the master to the reference position. The simulation results show that the excellence of the proposed scheme
Laser-Generated Thermoelastic Waves in an Anisotropic Infinite Plate: FEM Analysis (2005)

ABSTRACT In recent years, the study of thermoelastic waves generated by focused laser beams has been undertaken by several researchers because the technique provides a means for noncontact generation of ultrasonic waves. Laser-generated ultrasonic waves have diverse applications ranging from material characterization to nondestructive testing of defects. Transient ultrasonic guided waves generated in an anisotropic infinite plate by a pulsed laser beam are investigated in this study. A semi-analytical finite element method (SAFEM) is adopted for this purpose. In this method, the plate is divided into parallel layers through its thickness and the displacement and temperature in each layer are approximated by quadratic polynomials in the thickness direction (z). They are assumed to be continuous functions of time and in-plane cartesian coordinates (x, y). Transient response is calculated using Fourier transformations in time and space variables (x, y). The analysis technique is applicable to a generally anisotropic plate. Results for dispersion of guided waves and transient displacement in infinite silicon nitride (Si3N4) plates are presented. Numerical results show that for the assumed form of heat deposition by the laser mainly the lowest Lamb modes, namely, the lowest symmetric (S 0) and antisymmetric (A 0) modes, are excited. They also show that the transient response is dominated by the antisymmetric mode A 0, which shows characteristic dispersion. This study provides a quantitative model for laser-generated thermoelastic waves in an anisotropic plate and can be used for nondestructive evaluation. Keywords: LaserThermoelasticLamb waveAnisotropyPlate
Fluoroscopic Image Brightening by Electronic Means (1948)

More than six years have passed since Dr. W. Edward Chamberlain delivered the annual Carman Lecture before the Radiological Society of North America. In this lecture (1), he described in great detail the limitations of present-day fluoroscopy, and held out hope that these severe restrictions might soon be removed, or greatly alleviated, by the application of modern electronic technics to the amplification, or brightening, of fluoroscopic images. Such amplification has recently been accomplished in the Research Laboratories of the Westinghouse Electric Corporation, and it is hoped that before long practical realization of the method for use in clinical fluoroscopy will become available to the radiologist. There are two reasons why image amplification, or brightening, is necessary if large increases of brightness are to be obtained. First, x-ray intensities are already at the patient's tolerance level and may not be further increased without danger of injury. Second, there is not sufficient energy in the emerging x-rays to form an adequately bright picture even if all the energy were converted into light. Image amplification has been achieved by converting the x-ray pattern into an electron stream, and accelerating these electrons to high velocities. In this way, energy from an external source is introduced into the system and, when the electrons impinge on a phosphor layer, a brighter image results. This paper deals with the technical aspects of fluoroscopic image amplification, and describes in some detail the mechanism just outlined. Were it not for the dimness of the image, fluoroscopy would replace to a large extent the taking of roentgenograms. A single fluoroscopic examination would be equivalent to hundreds of films taken in cinematographic sequence and revealing the subject in all phases of movement and from many angles of projection. Unfortunately, however, the fluoroscopic image is excessively dim, and at existing brightness levels the human eye is capable of perceiving only a fraction of the detail which is actually on the screen. Dr. Chamberlain covered this aspect of the problem very thoroughly, and it will suffice to present here only a few aspects of retinal physiology which will serve to illustrate the tremendous ranges of brightness over which the eye is adaptable, and the great loss of definition which is incurred at low levels. The brightness level at which roentgenograms are ordinarily viewed is roughly 30 millilamberts. At this level, the eye is capable of recognizing as discrete two contours which are separated by as little as one one-thousandth of an inch. As the brightness of the object is decreased, the visual acuity of the eye deteriorates. At about one thousandth of this intensity we have reached the point where cone vision is no longer effective, the color sense is gone, and the fovea centralis is no longer the most sensitive part of the retina.
Optimal feature weighting for the continuous HMM (2008)

We propose new continuous hidden Markov model (CHMM) structure that integrates feature weighting component. We assume that each feature vector could include different subsets of features that come from different sources of information or different feature extractors. We modify the probability density function that characterizes the standard CHMM to include state and component dependent feature relevance weights. To learn the optimal feature weights from the training data, we modify the maximum likelihood based Baum-Welch algorithm and we derive the necessary conditions. The proposed approach is validated using synthetic and real data sets. The results are shown to outperform the standard CHMM.
Interactions between an Anticancer Drug and Polymeric Micelles Based on Biodegradable Polyesters (2008)

Interactions between the anticancer drug quercetin and biodegradable polyesters within micelles were investigated by DSC, WAXD, and UV analyses. For micelles based on poly(ethylene glycol) methyl ether-block-poly(epsilon-caprolactone) (MPEG-PCL), DSC analysis indicated that the interactions were between the hydrophobic core and the drug within the micelle. For micelles based on poly(ethylene glycol) methyl ether-block-poly(L-lactide) (MPEG-PLLA), the interactions were between the hydrophobic core and the drug and between hydrophilic segments and the drug. WAXD results indicated that no crystalline phase of the drug was found in either of the micelle types. Based on the DSC and WAXD results, two probable micelle structures were proposed. The UV spectra revealed the presence of hydrogen bonding as the main interaction between the drug and the polyesters. In vitro studies demonstrated that quercetin release from micelles was sustained and was affected by the polymer-drug interaction.
New class of rectangular and circular evanescent-mode waveguide filter (1998)

In this paper, a complete design procedure is presented for an original structure of evanescent-mode filters which does not require special tuning techniques or subsequent optimization procedures beyond the design method itself. The method covers the cases of both rectangular and circular waveguide structures. The structure is composed of an air-filled waveguide containing a number of dielectric inserts. It is designed such that the air-filled sections are evanescent, while those with dielectric inserts operate in the normal propagative mode. Furthermore, the interfaces with the external source and load are achieved via a pair of air-filled guides of a propagative nature. The technique consists in finding a scattering description of all the filter sections and junctions relying on an exhaustive electromagnetic study of the field quantities and implying modal analysis methods. This leads to a scattering description of the entire structure and, subsequently, to an approximate lumped equivalent circuit model. This, in turn, is identified with a bandpass filter prototype and the parameters of the waveguide filter (cross section, lengths of sections, and permittivity) are evaluated such that they lead to a close agreement with the response of the prototype. The bandwidth over which the quality of approximation is acceptable is studied in detail and several examples are given for both rectangular and circular filters. Experimental results are also presented indicating that the approach proposed is at the same time accurate and very efficient. © 1998 John Wiley & Sons, Inc. Int J RF and Microwave CAE 8: 161–192, 1998.
Ultra-High-Speed Performance of Ball Bearings and Annular Seals in Liquid Hydrogen at Up to 3 Million DN (120,000 rpm)© (2004)

The ultra-high-speed performance of a hybrid ceramic 25-mm-bore ball bearing, as well as that of floating-ring seals with a sealing diameter of 30 mm, was determined in liquid hydrogen at speeds to 120,000 rpm, 3 million DN, under thrust loads to 3,140 N and sealed pressures to 1.7 MPaG. The bearings had Si3N4 balls and a single outer land-guided retainer. The hybrid ceramic bearing exhibited excellent performance at high load, contrasting with the seized all-steel bearing; however, the ceramic balls developed superficial micro-cracks due to frictional heating. Effective cooling of the bearing was achieved by increasing the jet speed through the nozzles. The bearing power loss drastically increased with increasing speed and cooling flow rate. The critical load capacity without bearing damage was also evaluated. Furthermore, the sealing performance of the one-ring seal was superior to that of the two-ring seal in preventing the sealing ring seizure against the runner.
How sensitive is the fibre laser strain sensor? (2008)

It is known that the strain resolution of fibre laser sensors is determined by frequency noise of the laser sensor element. We compare the frequency noise of a number of distributed feedback fibre laser sensors and find that all exhibit similar dominant 1/<i>f</i> noise below 10kHz. Examination of current theories of thermodynamic noise and 1/<i>f</i> noise in fibre lasers suggests that these lasers may be close to the theoretical limits of strain sensitivity.
Antidiabetic and Hypolipidemic Activities of<i>Curculigo latifolia</i>Fruit:Root Extract in High Fat Fed Diet and Low Dose STZ Induced Diabetic Rats (2013)

Curculigo latifolia fruit is used as alternative sweetener while root is used as alternative treatment for diuretic and urinary problems. The antidiabetic and hypolipidemic activities of C. latifolia fruit:root aqueous extract in high fat diet (HFD) and 40 mg streptozotocin (STZ) induced diabetic rats through expression of genes involved in glucose and lipid metabolisms were investigated. Diabetic rats were treated with C. latifolia fruit:root extract for 4 weeks. Plasma glucose, insulin, adiponectin, lipid profiles, alanine aminotransferase (ALT), gamma glutamyltransferase (GGT), urea, and creatinine levels were measured before and after treatments. Regulations of selected genes involved in glucose and lipid metabolisms were determined. Results showed the significant (P < 0.05) increase in body weight, high density lipoprotein (HDL), insulin, and adiponectin levels and decreased glucose, total cholesterol (TC), triglycerides (TG), low density lipoprotein (LDL), urea, creatinine, ALT, and GGT levels in diabetic rats after 4 weeks treatment. Furthermore, C. latifolia fruit:root extract significantly increased the expression of IRS-1, IGF-1, GLUT4, PPAR α , PPAR γ , AdipoR1, AdipoR2, leptin, LPL, and lipase genes in adipose and muscle tissues in diabetic rats. These results suggest that C. latifolia fruit:root extract exerts antidiabetic and hypolipidemic effects through altering regulation genes in glucose and lipid metabolisms in diabetic rats.
A reliable microprocessor-based defibrillator analyzer (1982)

A scheme for a reliable microprocessor-based defibrillator analyzer for accurate measurement of various parameters of a dc defibrillator is proposed. A defibrillator, being a life saving device, needs routine calibration since any errors can have deleterious effects on the myocardium.
Sensitivity Analysis of the Design Parameters in Electrodynamic Bearings (2010)

Electrodynamic bearings exploit the eddy current effects that take place in a conductor rotating in a constant magnetic field to achieve passive levitation without the need of additional devices, as sensors, power electronics, etc. Nevertheless, the instability issues require a dynamic analysis that would guarantee the rotor stability. In the literature, electrodynamic bearings modeling is mainly based on quasi-static analysis, i.e., the study of the forces induced in a disk that rotates with a fixed eccentricity relative to the constant magnetic field. Although this approach is useful for a first-approximation analysis, it is intrinsically related to steady state conditions, and therefore limited. Besides, the quasi-static analysis is generally based on finite element simulations, in which geometries and material properties are tested through a trial-and-error method. In the following, a model of the bearing including a few parameters, but still able to describe both the quasi-static and the dynamic performance is presented. A sensitivity analysis based on the variation of the main design parameters of the electrodynamic bearing is performed.
Restoration of Complement-Enhanced Neutralization of Vaccinia Virus Virions by Novel Monoclonal Antibodies Raised against the Vaccinia Virus Complement Control Protein (2003)

The vaccinia virus complement control protein (VCP) is secreted by infected cells and has been shown to inhibit complement activation through interactions with C3b/C4b. It contains four short consensus repeat (SCR) domains. It has been suggested that all four SCRs are required for VCP's activity. To elucidate which SCR domains are involved in abolishing complement-enhanced neutralization of vaccinia virus virions, we generated and characterized a panel of mouse monoclonal antibodies (MAbs) raised against VCP. Ten MAbs were isolated and all recognized VCP on Western blots under reducing conditions as well as native-bound VCP in a sandwich enzyme-linked immunosorbent assay. Three of the 10 MAbs (2E5, 3D1, and 3F11) inhibited VCP's abolition of complement-enhanced neutralization of vaccinia virus virions. These MAbs blocked the interaction of VCP with C3b/C4b. The seven remaining MAbs did not alter VCP function in the complement neutralization assay and recognized VCP bound to C3b/C4b. To understand MAb specificity and mode of interaction with VCP, we mapped the MAb binding regions on VCP. The seven nonblocking MAbs all bound to the first SCR of VCP. One of the blocking MAbs recognized SCR 2 while the other two recognized either SCR 4 or the junction between SCRs 3 and 4, indicating that structural elements involved in the interaction of VCP with C3b/C4b are located within SCR domains 2 and 3 and 4. These anti-VCP MAbs may have clinical significance as therapeutic inhibitors of VCP's complement control activity and may also offer a novel approach to managing vaccinia virus vaccine complications that occur from smallpox vaccination.
Cardiovascular Safety of Stimulant Medications for Pediatric Attention-Deficit Hyperactivity Disorder (2010)

Attention-deficit hyperactivity disorder (ADHD) is a common neurobehavioral disorder that is often treated with stimulants such as methylphenidate and mixed amphetamine salts. Despite their efficacy and long history of use, there is concern about their potential for adverse cardiovascular effects in children and adolescents. Data from placebo-controlled and open-label extension trials published after 2000 were reviewed, and cardiovascular adverse event data were compared. Both placebo-controlled and open-label extension trials have repeatedly shown stimulant-induced increases in mean blood pressure, heart rate, and QT interval in children, adolescents, and adults. Although these increases seem relatively minor, their existence raises questions regarding whether stimulants could influence the likelihood of sudden death or other serious cardiovascular consequences, especially in patients with underlying heart problems. Moreover, questions have been raised regarding the necessity of screening patients for occult or unrecognized heart problems that are felt to be adversely affected by stimulant use. Obtaining a baseline electrocardiogram for any patient starting stimulant treatment is reasonable if access to such screening is readily available and not too costly.
Very Thin and Flat Lens Antenna Made of Artificial Dielectrics (2007)

Arbitrarily high permittivity realized in artificial dielectrics makes it possible to fabricate a very thin lens antenna for the microwave and m/m wave frequency bands. Photolithography technology adopted to make artificial dielectrics help control the permittivity place to place on the lens surface, resulting in a flat antenna different from the conventional convex or concave counterpart.
Seismic Behavior of Steel-Concrete Composite Frame Structures and Design Practice in the United States (2016)

Steel-concrete composite frames have been shown to be a sensible option for use as the primary seismic force resisting system of building structures. However, there remains little data to justify the structural system performance factors (i.e., R, Cd, and Ωo) that characterize the overstrength and ductility of these systems, which are a vital component of successful design in the United States. Based on a suite of new finite element formulations, this work investigates the behavior of composite moment and braced frames under seismic loading and develops rational system performance factors. A set of archetype frames, selected to be representative of the range of frames seen in practice, were designed according to current design specifications. Nonlinear static pushover and transient dynamic analyses were performed on the frames to generate the statistical data on the seismic response from which the performance factors are quantified. The results from this investigation enable a better understanding of the variability in collapse performance of composite frame systems and will facilitate more effective designs of these systems.
Facile Synthesis of <i>ortho</i>-Halo-Substituted 4-Aryl-2-Aminobutyric Acids (2008)

Herein we describe an efficient and practical route for the regioselective synthesis of 4-(5-bromo/chloropyrazol-1-yl)-2-aminobutyric acids. The compounds have been prepared by regioselective C-5 halogenation of 1-(3,3-dimethoxypropyl)-1H-pyrazole followed by a Strecker synthesis. In addition, Boc-protected 2-amino-4-(2-chlorophenyl)butyric acid and 2-amino-4-(3-chloropyridin-2-yl)butyric acid have been synthesized.
In Vivo and in Vitro Selection of Mitogen Responsive Lymphocytes in Patients with Chronic Lymphocytic Leukemia (1976)

The in vitro mitogen response of blood lymphoid cells from patients with chronic lymphocytic leukemia was observed to be low compared to lymphocytes from healthy subjects. However, highly responsive cells could be separated from the blood of such patients by a buoyant density centrifugation technique and such reactive cells were found to be enriched by treating the patients with chemotherapy or splenic irradiation.