gebhart/patrepeval huggingface dataset:
Optimization of Zr-Doped ZnO Thin Films Prepared by Sol-Gel Method (2008)

Semiconductor thin films of Zr-doped ZnO, with Zr concentrations varying from 0 to 5 at%, have been prepared using a sol-gel method. Crystallinity, microstructure, and optical properties affected by Zr concentration were investigated. In this study, Zr-doped ZnO thin films were deposited onto alkali-free glass substrates by spin-coating. The as-deposited films were preheated at 300°C and then annealed at 500°C in air. The experimental results showed that doping ZnO thin films with Zr not only refined the grain size but also increased transmittance and resistivity. Among all the thin films investigated in the present study, the 3 at% Zr-doped ZnO thin film exhibited the best properties with a transmittance of 86.3% and a RMS roughness value of 5.86 nm. In addition, thin-film transistors were fabricated by spin-coating a 3 at% Zr-doped ZnO active channel layer onto a transistor subassembly. These transistors exhibited n-type depletion mode in which threshold voltage and drain current on-to-off ratio were −18.0 V and 9.6×105, respectively.
Native-like Secondary Structure in Interleukin-1.beta. Inclusion Bodies by Attenuated Total Reflectance FTIR (1994)

Attenuated total reflectance FTIR has been used to study the structure of human interleukin-1 beta in inclusion bodies (IBs) and other aggregated forms. The secondary structure composition of native wild-type IL-1 beta determined by FTIR is in excellent agreement with that previously determined by crystallography and NMR: 52% beta-sheet, 25% loop/irregular structure, and 23% turn. Remarkably, IL-1 beta inclusion bodies exhibit secondary structural composition very similar to that of the native protein. The results indicate that the IBs form from a folding intermediate that has nativelike secondary structure. The secondary structure content of aggregated IL-1 beta, formed either in refolding or by thermal denaturation, was identical within experimental error to that of the IB, indicating that these aggregates were formed from intermediates with structures similar to that of the inclusion body.
A wide field-of-view CRT projection system with optical feedback for self alignment (1983)

Abstract : Evans & Sutherland has developed a multi-channel CRT projection system. This system uses microprocessor technology with optical feedback to provide self-alignment for color-hue, intensity, color-convergence, geometry, and focus. By replacing drift-prone analog correction circuits with digital circuits and D/A converters, system drifts are limited to gain and offset errors. These errors are optically detected and corrected in real-time by the microprocessor. Geometry drifts can be detected and corrected to within 1/4 of a pixel. Because this projection system is CRT based, image generator, lens, and projection angle induced distortions as large as 30% can be corrected by the projector's digital electronics. The projection system self-alignment capabilities together with edge matching make possible the tiling of multiple channels. This facilitates improved brightness and resolution over wide fields-of-view. A six channel system, with 30 degree by 30 degree fields-of-view for each channel, using a 12 foot radius screen of unity gain yields 7 ft-lambert brightness with better than 3 arc-minute resolution. (Author)
Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>and TiO<sub>2</sub>as Coatings for Safer LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub>Cathodes: Electrochemical Performance and Thermal Analysis by Accelerating Rate Calorimetry (2017)

Al2O3, SiO2 and TiO2 were coated on LiNi0.8Co0.15Al0.05O2 (NCA) in varying amounts and investigated regarding their influence on thermal stability and electrochemical performance. The presence of the coating on the surface was confirmed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Al2O3 showed agglomerated nano-scaled particles. SiO2 was coated homogeneously. TiO2 showed loose nano-scaled particles on the surface. The coated materials showed a decrease in capacity of ≈10 mAh g−1 with slightly higher cycling stability compared to the pristine NCA. Accelerating Rate Calorimetry (ARC) of the delithiated materials was conducted with 1 M LiPF6 in ethylene carbonate (EC): diethyl carbonate (DEC) 3:7 (by weight) + 2 wt% vinylene carbonate (VC) + 0.5 wt% lithium bis(oxalate)borate (LiBOB). The TiO2 coating resulted in an increase of the onset temperature of thermal runaway (TdT/dt>0.2 K/min) of 5°C. Coatings with Al2O3 and SiO2 led to a significant increase of TdT/dt>0.2 K/min of up to 10 and 11°C, respectively. The coatings are able to lower the extent of reaction between the highly reactive oxygen evolving from the charged cathode at higher temperatures and the organic solvent-based electrolyte.
Materials for microbolometers: vanadium oxide or silicon derivatives (2017)

Microbolometer arrays are the most used technology in thermal infrared imaging. Recent progress in materials and fabrication techniques for these devices have sparked much competition. Vanadium oxide (VO<sub>x</sub>) has been and is currently the most used material for commercial use of bolometers, followed by amorphous silicon (a-Si). However, other silicon derivatives, such as silicon-germanium (a-SiGe, poly-SiGe, and a-Ge<sub>x</sub>Si<sub>1-x</sub>O<sub>y</sub>) have shown promise in the recent years. Extensive research is performed to search for different bolometer materials that combine performance, lowcost, and convenience for uncooled thermal infrared imaging applications. In this review article, we discuss materials derived from VO<sub>x</sub> and Si and their fabrication process used in microbolometers, as well as important figures of merit such as temperature coefficient of resistance, responsivity, detectivity and resistivity.
Maximum-likelihood block decoding of noncoherent coded FSK for the CENELEC band (2008)

This paper addresses low frequency range power line communications (PLC), where the transmitters are output voltage and bandwidth limited. We investigate the block decoding of coded non-coherent 2-FSK modulation for the transmission over the impulsive noise channel with narrow band interference. The maximum-likelihood (ML) receiver is analyzed and suboptimum decoding algorithms improving the bit error rate performance are derived. Furthermore, an efficient transmission method of combining Reed Solomon (RS) coding with run length limited (RLL) codes is incorporated to obtain coding gain without expanding the bandwidth. Simulation results show the improved performance of the proposed RS-RLL scheme. Our coding/modulation scheme is in agreement with the existing CENELEC standard.
Long short-term memory neural network for network traffic prediction (2017)

This paper proposes a model of neural network which can be used to combine Long Short Term Memory networks (LSTM) with Deep Neural Networks (DNN). Autocorrelation coefficient is added to model to improve the accuracy of prediction model. It can provide better than the other traditional precision of the model. And after considering the autocorrelation features, the neural network of LSTM and DNN has certain advantages in the accuracy of the large granularity data sets. Several experiments were held using real-world data to show effectivity of LSTM model and accuracy were improve with autocorrelation considered.
A Domain-Specific Language for the Specification of Adaptable Context Inference (2011)

Context-aware mobile applications can benefit from context inference adaptation based on run-time operating conditions, such as battery life or sensor availability. Developing applications with such adaptable behavior, however, is notoriously cumbersome, as developers need to deal with low-level system interfacing and programming issues. In this paper we describe a domain-specific language (DSL) and a middleware infrastructure to support the specification, deployment and maintenance of run-time adaptable context inference processes. We illustrate the benefits of our approach via a case study, highlighting the new abstractions that facilitate the specification of adaptable behavior using different algorithms and the corresponding varying parameter settings, with a specific goal of minimizing the energy while maintanig acceptable end-application performance and accuracy.
Operation of double fed induction generators with unmodified low cost standard converters (2006)

This paper presents how to operate a double fed induction generator (DFIG) with a rated power of approximately 30kW with unmodified low cost standard converters. The stator of the machine is directly connected to the grid and the rotor is fed with variable voltage and frequency from two standard low cost voltage source converters. Actually such machines are used in wind generators with a rated power of more than 500 kW with special build converters. In the presented solution the rotor of the DFIG is fed with two DC-Link connected standard voltage source converters. The original software is designed to calculate speed and phase of the rotor by receiving a speed signal from the rotor shaft. Therefore it is necessary to add two small application modules to modify the firmware externally to realize the calculation of slip frequency and phase in real time. The equivalent network parameters of the DFIG are determined by the converter itself by using an autotune function. With this parameters it is possible to develop an analytical model of the system to set up a closed loop active and reactive power control. The test system provides the ability to control both power types decoupled and with an approximately linear characteristic.
Use of atorvastatin as an anti‐inflammatory treatment in Crohn's disease (2008)

Our findings imply that atorvastatin therapy reduces inflammation in patients with Crohn's disease and, therefore, encourage further investigations of statin-mediated protective effects in inflammatory bowel diseases.
Molecular diagnosis and clinical decisions in adult acute leukemia. (1999)

A number of relatively new molecularly based diagnostic tests are now available to the physician involved in the treatment of patients with acute leukemia. These assays have considerable potential to improve prognostic accuracy, to aid in the selection of therapy, and to substantially enhance the ability to monitor results of treatment. Cytogenetic analysis now is the most important diagnostic test for determining prognosis and selecting therapy in acute myeloid leukemia (AML), and arguably, in acute lymphoblastic leukemia (ALL) as well. The accuracy of cytogenetics in many cases can be enhanced through the use of polymerase chain reaction (PCR)-based assays. Molecularly based assays of the leukemia cell's sensitivity or resistance to particular classes of drugs are beginning to emerge as potentially important tools for selecting therapies. Studies using molecular markers of disease to monitor response to therapy are yielding important clues about the biology of leukemia and are increasingly being used to guide therapy. The best uses of these new molecularly based assays are still uncertain and are the subjects of a large number of current clinic trials. While questions abound about their full potential, almost without question they will change the way we think about, diagnose, and treat leukemia.
Epoxy Resin Leak Sealant (1966)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Walter H. Johnson; Epoxy Resin Leak Sealant. Am. J. Phys. 1 March 1966; 34 (3): xxx. https://doi.org/10.1119/1.1972928 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAmerican Association of Physics TeachersAmerican Journal of Physics Search Advanced Search |Citation Search
Selective deposition of graphene sheets on a flexible substrate by a nonuniform electric field (2014)

This study reports on the precise positioning of high-quality graphene sheets on a flexible polyethylene naphthalate substrate using a dielectrophoretic (DEP) force. Positive DEP assembly is carried out using a 100 kHz frequency AC signal with a peak-to-peak voltage of 10 V. The presence and quality of the graphene flakes aligned around the prepatterned electrodes are characterized by scanning electron microscopy, optical microscopy, and micro-Raman spectroscopy. Current–voltage measurements were also used to evaluate the electrical properties of these flexible devices under varying compressive (−) and tensile (+) strain conditions up to ±0.6%, where the currents decreased with increasing strains.
Optimization of the Drilling Performance in the 17½-in. Section of an Exploration Well in the Overthrust of Southern Italy (1992)

ABSTRACT The overthrust area of southern Italy presents a difficult drilling environment. The terrain is mountainous, the formations are tilted, abrasive, and lost circulation can be anticipated. The formations encountered in the 17-1/2″ section of an exploration well in the area were composed of hard and abrasive quartzitic sandstone containing traces of pyrite and chert with interbedded hydratable shales. Penetration rates were on the order of 1 m/hr with gage wear being a major dulling condition. Roller cone bits were pulled with gage wear of up to 18 mm. Bit life was generally less than 20 meters, resulting in an extreme amount of reaming undergage hole. An analysis of the drilling performance in this first well was performed. Several areas were identified where significant improvements in performance could be achieved on subsequent wells. The key area for overall improvement was the gage holding ability on the roller cone drill bits. Three different enhanced gage features were selected for evaluation. Enhanced tungsten carbide gage Diamond coated heels (active diamond) Diamond coated gage (passive diamond) This paper will examine the benefits of the revision to the drilling program including revised drilling parameters, bottomhole assemblies, and specialized roller cone bits. The impact on drilling performance and cost reduction are quantified for the 17-1 /2″ hole section in the second exploration well in this area.
New Insights into Aminoglycoside Antibiotics and Derivatives (2007)

In the post-genome era, RNA has emerged as a valid molecular target involved in many biochemical pathways such as cellular protein interactions. This includes transcription and translation, HIV-Rev and HIV-tat proteins binding to HIV RNA that encode HIV genetic information. The binding of natural and synthetic aminoglycosides to RNA or RNA-protein complexes has been a central focus of small molecules-RNA recognition events, since they bind selectively to a variety of RNA targets. The understanding of the contribution of shape-based and charge motifs involved in aminoglycosides-RNA complexes gives remarkable information of the translational miscoding process, thereby opening new insights for drug discovery. This review comprises relevant information about aminoglycosides antibiotics, including chemical structure, molecular mechanism, structure-activity relationships, recent advances in aminoglycoside mimetics over the last four years, resistance mechanisms and structure-toxicity relationships.
Growth factor‐mediated effects on chondrogenic differentiation of mesenchymal stem cells in 3D semi‐IPN poly(vinyl alcohol)–poly(caprolactone) scaffolds (2010)

Cells, signaling molecules and three-dimensional (3D) scaffolds are the major contributors to the in vitro regeneration of cartilage. This study evaluates the differentiation of mesenchymal stem cells to chondrocytes, in a 3D semi-interpenetrating polymer network (semi-IPN) scaffold that gives an appropriate niche for chondrogenic differentiation. The 3D semi-IPN scaffold poly(vinyl alcohol) and poly(caprolactone) mimics the properties of extracellular matrix of native cartilage. The chondrogenic differentiation of mesenchymal stem cells on the 3D scaffolds is carried out by supplementing signaling molecules like TGFbeta1, TGFbeta3, and BMP2 individually and in two different combinations. The results indicate that each growth factor supplement or combinations showed a different influence on cell morphology, overall distribution of cells, and secretion of cartilage specific molecules. We conclude from our results, that a combination of TGFbeta3 and BMP2 promotes better differentiation of mesenchymal stem cells to chondrocytes in our scaffold. This study hence points out that an appropriate combination of 3D scaffolds and signaling molecules are required in the differentiation and maintenance of the chondrogenic phenotype during in vitro regeneration of cartilage tissue. (c) 2010 Wiley Periodicals, Inc. J Biomed Mater Res, 2010.
Racial and Ethnic Disparities in Emergency Department Analgesic Prescription (2003)

Physicians were less likely to prescribe opioids to Blacks; this disparity appears greatest for conditions with fewer objective findings (e.g., migraine).
Frequency stabilization of frequency-doubled Nd:YAG lasers at 532 nm (2002)

We report the preliminary results on the frequency stabilization of two frequency-doubled diode-pumped Nd:YAG lasers to hyperfine structure components of the rovibrational transition P(54)32-0 of /sup 127/I/sub 2/ with the sub-Doppler sidebands method. In a preliminary experiment, we have obtained a relative frequency stability of 2.9/spl middot/10/sup -13/ for an integration time of 1 s.
Nonlinear, eddy current damped, thin-film write head model (1996)

A new thin-film write head model is described which is based on electrical impedance versus frequency measurements. The model includes the effects of head saturation and eddy current damping making it useful for simulation of the electrical input port (head coil) and magnetic output port (pole tip) signals, which would be observed under actual write conditions.
Improved activity retention of enzymes deposited on solid supports (1993)

Enzymes deposited on solid support usually show good stability when operated in organic solvents. Decreased stability of the enzyme preparations was noticed when low enzyme loadings were used (e.g., with Celite as support; less than 1 mg enzyme/g). It was possible to avoid the activity loss by the addition of an additive which protects the enzyme during the immobilization. Proteins (such as albumin, gelatin, and casein) and poly(ethylene glycol) were effective additives whereas amino acids, monomeric carbohydrates, and polysaccharides had no effect. The amount of additive needed for stabilization was shown to depend on the structure of the support, more additive being required for a support with high porosity. The stabilizing effect was investigated in a series of glyceryl-controlled-pore glass (CPG) with varying specific surface areas (9.5-180 m(2)/g). The minimum addition of albumin, giving full stabilization, on the different supports correlated to a monolayer coverage of the surface, approximately 2-3 mg protein/m(2). The effect of the additive was less pronounced when increasing amounts of enzyme were immobilized (5-40 mg enzyme/g Celite). The effect of the additives was studied using mandelonitrile lyase, but alpha-chymotrypsin and lipase P were also shown to be stabilized.
Pathological Role of Tonsillar B Cells in IgA Nephropathy (2011)

Although impaired immune regulation along the mucosa-bone marrow axis has been postulated to play an important role, the pathogenesis of IgA nephropathy (IgAN) is unknown; thus, no disease-specific therapy for this disease exists. The therapeutic efficacy of tonsillectomy or tonsillectomy in combination with steroid pulse therapy for IgAN has been discussed. Although randomized control trials for these therapies are ongoing in Japan, the scientific rationale for these therapies remains obscure. It is now widely accepted that abnormally glycosylated IgA1 and its related immune complex (IC) are probably key molecules for the pathogenesis, and are thus considered possible noninvasive biomarkers for this disease. Emerging evidence indicates that B cells in mucosal infections, particularly in tonsillitis, may produce the nephritogenic IgA. In this paper, we briefly summarize characteristics of the nephritogenic IgA/IgA IC, responsible B cells, and underlying mechanisms. This clinical and experimental information may provide important clues for a therapeutic rationale.
Para-CORDIC: Parallel CORDIC Rotation Algorithm (2004)

In this paper, the parallel COrdinate Rotation DIgital Computer (CORDIC) rotation algorithm in circular and hyperbolic coordinate is proposed. The most critical path of the conventional CORDIC rotation lies in the determination of rotation directions, which depends on the sign of the remaining angle after each iteration. Using the binary-to-bipolar recoding (BBR) and microrotation angle recoding techniques, the rotation directions can be predicted directly from the binary value of the initial input angle. The original sequential CORDIC rotations can be divided into two phases where the rotations in each phase can be executed in parallel. Our proposed architectures have a more regular and simpler prediction scheme compared to previous approaches. The critical path delay is reduced since the concurrently predicted rotations can be combined using multioperand carry-save addition structures.
<i>In vivo</i> evaluation of bone deposition in macroporous titanium implants loaded with mesenchymal stem cells and strontium‐enriched hydrogel (2014)

Bone-implant integration represents a major requirement to grant implant stability and reduce the risk of implant loosening. This study investigates the effect of progenitor cells and strontium-enriched hydrogel on the osseointegration of titanium implants. To mimic implant-bone interaction, an ectopic model was developed grafting Trabecular Titanium(™) (TT) implants into decellularized bone seeded with human bone marrow mesenchymal stem cells (hBMSCs). TT was loaded or not with strontium-enriched amidated carboxymethylcellulose (CMCA) hydrogel and/or hBMSCs. Constructs were implanted subcutaneously in athymic mice and osteodeposition was investigated with microcomputed tomography (micro-CT), scanning electron microscopy (SEM), and pull-out test at 4, 8, and 12 weeks. Fluorescence imaging was performed at 8 and 12 weeks, histology at 4 and 8 weeks. Micro-CT demonstrated the homogeneity of the engineered bone in all groups, supporting the reproducibility of the ectopic model. Fluorescence imaging, histology, SEM and pull-out mechanical testing showed superior tissue ingrowth in TT implants loaded with both strontium-enriched CMCA and hBMSCs. In our model, the synergic action of the bioactive hydrogel and hBMSCs increased both the bone deposition and TT integration. Thus, we suggest that using orthopedic prosthetic implant preloaded with strontium-enriched CMCA and seeded with BMSCs could represent a valid single-step surgical strategy to improve implant osseointegration.