gebhart/patrepeval huggingface dataset:
Theory of multilayer neutron monochromators (1983)

The theory of the reflecting properties of multilayer monochromators is developed on the basis of both the kinematical and the dynamical theory of neutron scattering with emphasis on the way in which the flux and polarization of the reflected beam depends on the parameters that characterize the multilayer. The effect of random variations in layer thickness is investigated using a cumulant expansion method. The contamination of the reflected beam due to both higher-order Bragg reflections and specular reflection is also discussed.
High precision bidirectional chopper instrumentation amplifier with negative and positive input common mode range (2014)

A current feedback instrumentation amplifier (CFIA) with extended common mode input voltage range is presented. Referred to input offset of 70µV is obtained firstly by using chopping and gain enhancement techniques in order to increase the DC gain and secondly by adding an offset reduction loop (ORL). The proposed circuit is implemented in a high voltage 0.5µm SOI technology. A common mode rejection ratio (CMRR) of 260dB has been obtained by using single ended three stage architecture with a common mode input voltage from −18V to 80V. The stability of the CFIA is ensured for a close loop gain of 20V/V.
New Antiepileptic Drugs for Children: Felbamate, Gabapentin, Lamotrigine, and Vigabatrin (1994)

After a 15-year hiatus, several new antiepileptic drugs have been approved or are under Food and Drug Administration investigation for use in the United States. This article reviews four of these new drugs--felbamate, gabapentin, lamotrigine, and vigabatrin. Although these drugs have been primarily developed for use in adults with partial seizures, they will also likely be used in children with partial epilepsy. Pediatric experience with several of these drugs has demonstrated safety and efficacy in other seizure types and epilepsy syndromes. These drugs will be an important addition to the therapeutic armamentarium for pediatric epilepsy. Additional studies are needed to fully explore the safety and efficacy of these drugs in a variety of pediatric epilepsies and to compare them to existing antiepileptic drugs.
Numerical Multi-scale Analysis of Motorbike Heat Exchangers (2005)

&lt;div class="htmlview paragraph"&gt;A numerical multi-scale method for the analysis of heat exchangers is presented. In the present work this methodology has been used to analyze the heat exchangers of the Ducati 999 motorbike cooling system. In order to compute the flowfield around the vehicle and to obtain the velocity distribution inside heat exchangers volume, a finite volume model has been adopted. A distributed model is then used to analyze the heat exchange process that takes place into the heat exchanger for different velocity distributions and for a constant liquid inlet temperature. The results of the finite volume analysis are described with particular emphasis on the airflow distribution across the thermal devices. Finally, a comparison of the results obtained by means of the distributed-parameters model for the uniform airflow case and those obtained with the computed airflow distributions is presented.&lt;/div&gt;
Composite modulation transfer function evaluation of a cone beam computed tomography breast imaging system (2009)

Several factors during the scanning process, image reconstruction and geometry of an imaging system, influence the spatial resolution of a computed tomography imaging system. In this work, the spatial resolution of a state of the art flat panel detector-based cone beam computed tomography breast imaging system is evaluated. First, scattering, exposure level, voltage, voxel size, pixel size, back-projection filter, reconstruction algorithm, and number of projections are varied to evaluate their effect on spatial resolution. Second, its uniformity throughout the whole field of view is evaluated as a function of radius along the x-y plane and as a function of z at the center of rotation. The results of the study suggest that the modulation transfer function is mainly influenced by the pixel, back-projection filter, and number of projections used. The evaluation of spatial resolution throughout the field of view also suggests that this imaging system does have a 3-D quasi-isotropic spatial resolution in a cylindrical region of radius equal to 40 mm centered at the axis of rotation. Overall, this study provides a useful tool to determine the optimal parameters for the best possible use of this cone beam computed tomography breast imaging system.
Evidence of an Orexigenic Role for Cocaine- and Amphetamine-Regulated Transcript after Administration into Discrete Hypothalamic Nuclei (2001)

Cocaine- and amphetamine-regulated transcript is expressed in hypothalamic regions involved in the central control of food intake. Previous data have implicated cocaine- and amphetamine-regulated transcript as an anorectic peptide. We studied the effect of the active fragment of cocaine- and amphetamine-regulated transcript, cocaine- and amphetamine-regulated transcript-(55-102), on feeding when injected into discrete nuclei of the hypothalamus. Cocaine- and amphetamine-regulated transcript-(55-102) (0.04 nmol) elicited a delayed, but significant, increase in feeding in 24-h fasted rats after injection into the ventromedial nucleus (1-2 h, 261 +/- 60% of control; P < 0.05) and arcuate nucleus (1-2 h, 225 +/- 38% of control; P < 0.05) of the hypothalamus. Administration of a higher dose of cocaine- and amphetamine-regulated transcript-(55-102) (0.2 nmol) elicited a significant increase in feeding after injection into the ventromedial nucleus (1-2 h, 1253 +/- 179% of control; P < 0.001), arcuate nucleus (1-2 h, 265 +/- 43% of control; P < 0.05), paraventricular nucleus (2-4 h food intake, 186 +/- 29% of control; P < 0.05), lateral hypothalamic area (2-4 h, 280 +/- 34% of control; P < 0.001), anterior hypothalamic area (2-4 h, 252 +/- 42% of control; P < 0.01), dorsomedial nucleus (2-4 h, 368 +/- 29% of control;P < 0.001) and supraoptic nucleus (2-4 h, 212 +/- 34% of control; P < 0.05) of the hypothalamus. Administration of cocaine- and amphetamine-regulated transcript-(55-102) into the third ventricle of the hypothalamus resulted in an inhibition in feeding [0-4 h (0.4 nmol), 33 +/- 13% control; P < 0.001], but was associated with marked abnormalities in behavior, which may have interfered with feeding. These behavioral abnormalities were not observed after the administration of cocaine- and amphetamine-regulated transcript-(55-102) directly into the arcuate nucleus. These data suggest that cocaine- and amphetamine-regulated transcript may play an orexigenic role in the hypothalamic feeding circuitry.
Speech and sketching for multimodal design (2004)

While sketches are commonly and effectively used in the early stages of design, some information is far more easily conveyed verbally than by sketching. In response, we have combined sketching with speech, enabling a more natural form of communication. We studied the behavior of people sketching and speaking, and from this derived a set of rules for segmenting and aligning the signals from both modalities. Once the inputs are aligned, we use both modalities in interpretation. The result is a more natural interface to our system.
Frayed Wires:  A Thermally Stable Form of DNA with Two Distinct Structural Domains (1996)

In aqueous solutions containing mono- and divalent cations, the oligodeoxyribonucleotide d(A15G15) readily self-assembles into high-molecular weight species that resolve as discrete bands on native and denaturing electrophoresis gels. The complexes consist of an integer number of strands of d(A15G15), the number of strands range from one (the monomer) to greater than nine. The complexes form within a few minutes even at low concentrations (2 microM strands) of d(A15G15). The relative concentration of species is determined by the solvent conditions. The complexes are resistant to standard denaturation conditions, 50% formamide heated to 95 degrees C for 2 min followed by electrophoresis in 7 M urea at 55 degrees C. In the proposed model for the oligomers and polymers of d(A15G15), several molecules of d(A15G15) interact via a stem of tetraplex structure formed by the guanine residues. The 15 guanine residues in the stem account for its high stability. The 5' end adenines form single-stranded arms that are displaced from the guanine-containing stem. The arms can participate in the formation of Watson-Crick base pairs with dT10 and other partially complementary oligodeoxyribonucleotides such as d(CT15). Engagement of the arms in interactions with other strands does not affect the distribution of the species between different conformations. On the other hand, the addition of the fully complementary oligodeoxyribonucleotide d(C15T15) to the polymer leads to the disappearance of the high-molecular weight complexes and results in the formation of a canonical Watson-Crick base-paired duplex. The type and concentration of the cation present in solution determine which conformation d(A15G15) will adopt. Divalent cations at millimolar concentrations lead to the formation of the polymer, while the presence of the monovalent cations stabilizes lower-molecular weight complexes consisting of two to six strands of d(A15G15).
Development of a unified method to predict PIO (1996)

The USAF has undertaken an extensive program to develop a unified method to predict susceptibility to pilot-induced oscillations. This paper describes work done in support of that program. A catalog of PIO time histories has been assembled and key parameters measured from the records. These data provide information on the nature of PIOs, allowing for definitions based on PIO frequency and amplitude. The need for specific evaluation maneuvers to investigate PIO susceptibility is discussed. Shortcomings with the decision-tree PIO rating scale are identified. Analytical prediction criteria based on bandwidth are reviewed and compared with five sets of flight research data. The results show that the proposed criteria are effective in predicting susceptibility to PIO. (Author)
OS EGRESSOS NO PROCESSO DE AVALIAÇÃO (2012)

"O presente estudo tem como objetivo contribuir com a reflexão sobre a importância dos egressos no processo de avaliação institucional. Nele foi analisado "O Projeto de Interiorização da UFPA" desenvolvido no interior do Pará, onde foram ofertados Cursos de Licenciatura Plena visando qualificar os professores leigos. A investigação foi realizada no Campus do Tocantins, Município de Cametá- Pará, respondendo às questões: Qual a importância dos egressos no processo de avaliação dos cursos de Licenciatura? Quem são os egressos oriundos do Projeto de Interiorização da UFPA no Campus do Tocantins, no período entre 1992 e 2004? Como os egressos absorvidos no mundo do trabalho local avaliam a formação recebida e a gestão do projeto no município? A abordagem metodológica foi quantiqualitativa; o banco de dados totalizou, dentro do recorte temporal para a pesquisa, 672 egressos atuando profissionalmente em Cametá. O universo foi de 373 egressos, dos quais se extraiu 30%, como amostra inquirida por questionários, somados a cinco entrevistas."
Oxidation of Cyclopropylamines and Aziridines with Lead Tetraacetate (1975)

Abstract The title reaction of 2-phenylcyclopropylamine gives cinnamaldehyde, while that of the 1-phenyl isomer produces benzonitrile and ethylene. The similar treatment of 2-phenylaziridine provides benzaldehyde as the only isolable product. These reactions are explained by assuming the common intermediacy of nitrenium ions such as (Remark: Graphics omitted.) respectively. The assumption is confirmed by the oxidation of the corresponding amines with sodium hypochlorite. Entention of the reaction to 2,3-polymethyleneaziridines with R group on C-2 afforded R–CO–(CH2)n–C≡N type products (R=H, alkyl, phenyl) in preparative yields. This provides a novel method of C=C bond cleavage of cycloalkenes.
Transcutaneous, Noninvasive Monitoring of pO2 (1976)

A special sensor attached to the skin has made possible continuous recordings of blood oxygen levels in neonates, sick infants, parturient women, and even fetuses during labor. The instrument has been used with more than a thousand infants and has been a significant aid in management of neonatal cardiorespiratory problems. It may also prove valuable in other situations, such as myocardial infarction and major surgery.
Highly Acidic Mesostructured Aluminosilicates Assembled from Surfactant-Mediated Zeolite Hydrolysis Products (2006)

The surfactant-mediated hydrolysis of ZSM-5 zeolite affords five-membered ring subunits that can be readily incorporated into the framework walls of a hexagonal mesostructured aluminosilicate, denoted MSU-Z. The five-membered ring subunits, which are identifiable by infrared spectroscopy, impart unprecedented acidity to the mesostructure, as judged by cumene cracking activity at 300 degrees C. Most notably, MSU-Z aluminosilicate made through the base hydrolysis of ZSM-5 in the presence of cetyltrimethylammonium ions exhibits a cumene conversion of 73%, which is 6.7-fold higher than the conversion provided by a conventional MCM-41. This approach to stabilizing zeolitic subunits through surfactant-mediated hydrolysis of zeolites appears to be general. The hydrolysis of USY zeolite under analogous hydrolytic conditions also affords zeolitic fragments that boost the acidity of the mesostructure in comparison to equivalent compositions prepared from conventional aluminosilicate precursors.
Imbalance in the expression of the activating type I and the inhibitory type II interleukin 1 receptors in endometriosis (2007)

IL1R1/IL1R2 imbalance may amplify endometrial cell responsiveness to IL1 and represent a key mechanism underlying the ability of these cells to implant and develop into host tissues.
Resolution analysis in computational imaging with patterned illumination and bucket detection (2014)

In computational imaging by pattern projection, a sequence of microstructured light patterns codified onto a programmable spatial light modulator is used to sample an object. The patterns are used as generalized measurement modes where the object information is expressed. In this Letter, we show that the resolution of the recovered image is only limited by the numerical aperture of the projecting optics regardless of the quality of the collection optics. We provide proof-of-principle experiments where the single-pixel detection strategy outperforms the resolution achieved using a conventional optical array detector for optical imaging. It is advantageous in the presence of real-world conditions, such as optical aberrations and optical imperfections in between the sample and the sensor. We provide experimental verification of image retrieval even when an optical diffuser prevents imaging with a megapixel array camera.
Nutritional studies in the seed production of fish-XX. Effective components in cuttlefish meal and raw krill for improvement of quality of red seabream Pagrus major eggs. (1991)

Red seabream broodstock were fed various diets of different nutritional quality for either 26 days or shortly before spawning to clarify the effective components in cuttlefish meal and raw krill which aid in quality egg production. The percentage of buoyant eggs was lowest in the control group receiving the white fish meal diet, and was elevated by the addition of 200mg DL-α-tocopheryl acetate. The value was also effectively improved by replacement of white fish meal with defatted or intact cuttlefish meal as a protein source. Feeding broodstock with frozen raw krill after previously being fed control diet resulted in elevation of the percentage of buoyant eggs and normal larvae. Equally good results were obtained by substitution of cuttlefish liver oil in the control diet with 2.5% krill polar lipid or 2.5% krill nonpolar lipid. However, neither defatted krill meal nor fat-soluble fraction of cut-tlefish meal showed the good effect on the egg quality. Consequently, the superior quality of cuttlefish meal to the white fish meal as a protein source for red seabream broodstock diets was reconfirmed. And the effective components in raw krill, aiding the reproduction of red seabream, are suggested to be the polar and nonpolar lipid fractions. In addition, vitamin E was also found to have the same efficiency for improvement of the egg quality.
Design issues for SiGe heterojunction bipolar transistors (2003)

Recent progress in the growth of strained SiGe epitaxial layers, demonstrating the feasibility of silicon-based heterojunction transistors, is examined. The specific design issues for SiGe HBTs are discussed. These are illustrated by reviewing the experimentally obtained electrical characteristics of recent SiGe-based devices. Analytical and numerical calculations are used to explain the device physics and to assess the potential circuit advantage of SiGe for present and future technologies. Experimental results for a double-polysilicon structure with a non-self-aligned emitter opening are reported. For this type of device the additional degree of freedom available for profile optimization can be employed to enhance f/sub T/, shift the peak f/sub T/ to lower current density, or lower the base sheet resistance. Very good DC operation has been observed at room and low temperature, suggesting improved speed performance over homojunction devices.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Testing and Prediction of Performance and Emissions From Bituminous (Drummond Colombia) and Sub-Bituminous (Adaro Indonesia) Coals and Their Blends (2006)

We predict the combustion behavior and pollutant emissions of blends of a Colombian bituminous coal, Drummond, and an Indonesian sub-bituminous coal, Adaro, in pulverized-coal utility boilers. This work is based on full-scale numerical simulations with GLACIER, a powerful computational-fluid-dynamic (CFD) code that uses the two-mixture fraction approach which models two separate coal streams in the combustion chamber. By burning the coals and their blends in a pilot-scale test furnace, previously unknown information on the coal combustion, such as devolatilization and char oxidation kinetic parameters, was determined and the CFD model validated for the test furnace. The same set of parameters was used for the CFD model configured for an opposed-wall and a tangential fired utility boiler. Our results show good fits between numerical results and experimental data for gas temperature, CO2, O2, and NOx, both in the test furnace and in the utility boilers, for single coals and their blends. We believe that the tool we developed can help utility companies make rational decisions on the use of new coals or coal blends so as to lower pollutant emissions while maintaining the same combustion efficiency.
Prognostic and Putative Predictive Biomarkers of Gastric Cancer for Personalized Medicine (2013)

We investigated various phenotypic and genotypic biomarkers of gastric cancer (GC) testing the following hypotheses: are these biomarkers suitable for the identification of GC subtypes, are they of prognostic significance, and should any of these biomarkers be considered to tailor patient treatment in the future. The study cohort consisted of 482 patients. pTNM-stage was based on surgical pathologic examination. The Laurén and mucin phenotype was assessed. Helicobacter pylori and Epstein-Barr virus infections were documented. The following biomarkers were determined: BRAF, KRAS, NRAS, and PIK3CA genotype, microsatellite instability, mucin 1, mucin 2, mucin 5, and mucin 6, CD10, E-cadherin, β-catenin, and lysozyme. The histologic phenotype correlated with 10/13 (77%) clinicopathologic patient characteristics and 6/13 (46%) immunohistochemical/molecular biological biomarkers. Inversely, immunohistochemical biomarkers (mucin phenotype, E-cadherin, β-catenin, and lysozyme) were unsuitable for subclassification of GC. It showed too much overlap between the different subtypes. Among the genotypes, only microsatellite instability correlated with tumor type being more prevalent in intestinal and unclassified GCs. Patient survival correlated significantly with 8 (62%) clinicopathologic and 5 (36%) immunohistochemical/molecular biomarkers. Interestingly, in proximal GCs, KRAS mutation was associated with worse prognosis, as was persistent H. pylori infection in unclassified GCs. Mucin 2 (all patients, proximal GCs) and PIK3CA (exon 20; intestinal type GC) prognosticated independently patient survival. The biomarkers examined herein are unsuitable to aid histologic classification of GC. However, several of them show a correlation with either phenotype and/or prognosis and may be considered to tailor patient treatment in the future, such as KRAS, PIK3CA, MSI, and H. pylori status.
Research on grid-connected operation of novel Variable Speed Constant Frequency (VSCF) shaft generator system on modern ship (2012)

It is obvious that hybrid propulsion ship with shaft generator system can make much better use of energy, thus with high efficiency. A novel Variable Speed Constant Frequency (VSCF) shaft generator system used on modern ship is analyzed and its structure, operational principle and control strategy are studied in this paper. The system simulation model of the shaft generator system is built in the paper and some simulation results are achieved. The simulation results show that many operation conditions of the shaft generator system, such as the synchronization, operation in parallel with the diesel generator (DG) set with good load sharing performance and splitting can be achieved successfully and stably. It is well suitable for the modern ship power system with a variety of requirements.
Program for the Division of Chemical Education: Dallas, TX, 29 March - 2 April 1998 (1998)

ADVERTISEMENT RETURN TO ISSUEPREVReportNEXTProgram for the Division of Chemical Education: Dallas, TX, 29 March - 2 April 1998Mark Freilich , Paul Kelter , and Tom Wildeman Cite this: J. Chem. Educ. 1998, 75, 3, 263Publication Date (Web):March 1, 1998Publication History Received3 August 2009Published online1 March 1998Published inissue 1 March 1998https://doi.org/10.1021/ed075p263Request reuse permissions Article Views32Altmetric-Citations-LEARN 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 (75 KB) Get e-AlertscloseSUBJECTS:Chemistry education Get e-Alerts
Pressure-induced shift and broadening of 1510–1540-nm acetylene wavelength calibration lines (2000)

We have measured the pressure-induced shift for 15 lines of the ν1+ν3 rotational–vibrational band of acetylene 12C2H2. These lines are useful as wavelength references in the 1510–1540-nm region. We find that the pressure shift varies from +0.008(2) pm/kPa for line R1 to +0.043(2) pm/kPa for line R27, with many of the lines exhibiting a shift near +0.017 pm/kPa (or, equivalently, +2.3×10-3 pm/Torr or -0.29 MHz/Torr). In addition, we have measured the pressure broadening of these lines and find that it also varies with line number and is typically ∼0.7 pm/kPa (∼12 MHz/Torr). We also evaluate the line sensitivity to temperature changes and electromagnetic fields.