gebhart/patrepeval huggingface dataset:
Tuning the Light Emission Properties by Band Gap Engineering in Hybrid Lead Halide Perovskite (2014)

We report about the relationship between the morphology and luminescence properties of methylammonium lead trihalide perovskite thin films. By tuning the average crystallite dimension in the film from tens of nanometers to a few micrometers, we are able to tune the optical band gap of the material along with its photoluminescence lifetime. We demonstrate that larger crystallites present smaller band gap and longer lifetime, which correlates to a smaller radiative bimolecular recombination coefficient. We also show that they present a higher optical gain, becoming preferred candidates for the realization of CW lasing devices.
Differential Inactivation of Maturation-Promoting Factor and Mitogen-Activated Protein Kinase Following Parthenogenetic Activation of Bovine Oocytes1 (1998)

Bovine oocytes matured for 24 h (young) or 40 h (aged) were treated with calcium ionophore (A23187) alone or followed with 6-dimethylaminopurine (6-DMAP), a protein phosphorylation inhibitor, and were then assayed for histone H1 kinase and mitogen-activated protein kinase (MAPK) activities. Additionally, the changes in chromatin, meiotic spindle, and microfilament were assessed by immunofluoresence microscopy. In both young and aged oocytes, treatment with 6-DMAP following A23187 treatment abolished the activities of both H1 and MAPKs; the decline of H1 kinase preceded the decline in MAPK activity. However, A23187 treatment alone caused a slower decrease in H1 kinase activity and no evident MAPK alteration in young oocytes. In contrast, activities of both kinases decreased in aged oocytes after A23187 treatment, similar to the response in the combined treatments. The inactivation of MAPK was caused by dephosphorylation of MAP42/extracellular signal-regulated kinase 2 (ERK2) as detected by gel mobility shift in the Western blot assay. A23187 treatment of young oocytes led to chromosome separation and second polar body extrusion, but not pronuclear development, with the majority of the oocytes arrested at a transitional stage of metaphase to anaphase known as metaphase III (MIII). However, most of the A23187-treated aged oocytes developed to the pronuclear stage. When oocytes, regardless of age, were treated by A23187 plus 6-DMAP, bivalent chromosomes were clumped into a single mass, the spindle was disassembled, microtubule networks were distributed in the cytoplasm, and a pronucleus appeared. It is suggested that the decrease in H1 kinase activity is involved in the initiation of oocyte activation, i.e., the exit from metaphase II, whereas the decrease in MAPK activity correlates with onset of pronuclear formation. In conclusion, inactivation of maturation-promoting factor and MAPKs probably occurs via two independent processes, and the inactivation of both kinases is required for the metaphase II oocytes to progress through interphase. High MAPK activity might contribute to spindle stabilization, and inactivation of MAPK is associated with microtubular network formation in the cytoplasm.
Optimization of Existing Centroiding Algorithms for Shack Hartmann Sensor (2009)

Three centroiding techniques to estimate the position of the spots in a Shack Hartmann sensor: Normalized Centre of Gravity (CoG), Iteratively Weighted Centre of Gravity (IWCoG) and Intensity Weighted (IWC) centroiding are studied in comparison. The spot pattern at the focal plane of a Shack Hartmann sensor was simulated by including the effect of a background noise. We present the results of optimization of the performance of each of the centroiding techniques as a function of Signal to Noise Ratio (SNR) at different experimental conditions.
RIGHS TO THE GOOD AND HEALTY ENVIRONMENT (1992)

Migraine and tension-type headache are common problems in children and adolescents. If we consider the possible differential diagnosis in the case of headache in children, we cannot exclude a symptomatic origin of the problem and in this case Chiari malformation can be the reason for an unrevealed organic cause of headache itself. Proper diagnosis and management of headache in young age depends on taking through history and comprehensive clinical examination. The clinical screening includes a complete neurological, mental status and physical examination and in some cases neuroimaging help is needed. Important suggestions in case of children with headache are: reassure the family about the benignity of the condition (by excluding organic diseases); educate the patients and their parents about the pathogenesis and natural history of headache; establish realistic goals for treatment according to age.
Gastroesophageal Scintigraphy: Is It a Sensitive Screening Test for Gastroesophageal Reflux Disease? (1985)

Dynamic radionuclide imaging potentially offers a convenient, noninvasive technique for detecting gastroesophageal (GE) reflux disease. Initial studies suggested a high degree of sensitivity, although subsequent reports have been less encouraging. We sought to clarify this controversy by assessing the sensitivity of GE scintigraphy in 15 patients with severe esophagitis at endoscopy and 15 health volunteers. After acid loading, scintigraphy was performed in the basal state and after maneuvers (Valsalva, abdominal compression) which provoke GE reflux. Computer analysis permitted calculation of a reflux index for each maneuver. An index greater than 4% was considered a positive test. We found that the mean reflux index for the patients was significantly greater (p less than 0.01) than the healthy volunteers; 4.55 +/- 1.75% versus 0.42 +/- 0.11%, means +/- S.E.M. Only 30% of the patients had a reflux greater than 4%. Using data from our healthy volunteers, we redefined an abnormal reflux index as greater than 1.7%, but that only improved the test sensitivity to 60% and the specificity to 100%. Scintigraphy for reflux is primarily limited by the short duration of imaging. We cannot recommend GE scintigraphy as a useful screening test for reflux.
Synthesis of ZrO<sub>2</sub>−Carbon Nanotube Composites and Their Application as Chemiluminescent Sensor Material for Ethanol (2006)

ZrO2-carbon nanotube (CNT) composites have been successfully synthesized via decomposition of Zr(NO3)4.5H2O in supercritical carbon dioxide-ethanol solution with dispersed CNTs at relatively low temperatures. The samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM), and energy-dispersive X-ray (EDX) analyses. It was demonstrated that CNTs were fully coated with an amorphous ZrO2 layer, and the coating layer was nominally complete and uniform. In addition, the thickness of the coating sheath could be readily controlled by tuning the Zr(NO3)4.5H2O/CNTs ratio used. Furthermore, the chemiluminescent sensor prepared from ZrO2-carbon nanotube composites exhibited dramatic sensitivity as well as high stability and selectivity to ethanol.
Inhibition and Redistribution of NHE3, the Apical Na+/H+ Exchanger, by<i>Clostridium difficile</i>Toxin B (2004)

NHE3, the apical isoform of the Na(+)/H(+) exchanger, is central to the absorption of salt and water across the intestinal epithelium. We report that treatment of epithelial cells with toxin B of Clostridium difficile, a diarrheal pathogen, causes a pronounced inhibition of NHE3 activity, with little effect on the basolateral NHE1 isoform. Depression of NHE3 activity is accompanied by the translocation of apical exchangers to a subapical endomembrane compartment. Treatment of cells with toxin B increased the fraction of exchangers that were solubilized by nonionic detergents and induced dephosphorylation and extensive redistribution of ezrin. The Rho-kinase inhibitor, Y-27632, also altered the distribution and activity of NHE3. We suggest that inactivation of Rho-family GTPases by clostridial toxin B alters the interaction between NHE3 and the microvillar cytoskeleton, possibly by impairing the ability of ezrin to bridge the exchangers to filamentous actin. Detachment of NHE3 from the actin skeleton would facilitate its internalization, resulting in net disappearance from the apical surface. The consequent inhibition of transport is likely to contribute to the diarrheal effects of C. difficile.
Adsorption dynamics of CO2 on Zn-ZnO(0001): A molecular beam study (2005)

Presented are initial S(0) and coverage Theta dependent, S(Theta), adsorption probability measurements, respectively, of CO(2) adsorption on the polar Zn-terminated surface of ZnO, parametric in the impact energy E(i), the surface temperature T(s), the impact angle alpha(i), varied along the [001] azimuth, the CO(2) flux, and the density of defects, chi(Ar(+)), as varied by rare gas ion sputtering. S(0) decreases linearly from 0.72 to 0.25 within E(i)=0.12-1.33 eV and is independent of T(s). Above E(i)=0.56 eV, S(0) decreases by approximately 0.2 with increasing alpha(i). The shape of S(Theta) curves is consistent with precursor-mediated adsorption (Kisliuk shape, i.e., S approximately const) for low E(i); above E(i)=0.56 eV, however, a turnover to adsorbate-assisted adsorption (S increases with Theta) has been observed. The initial slope of S(Theta) curves decreases thereby with increasing alpha(i), chi(Ar(+)), and T(s), i.e., the adsorbate-assisted adsorption is most distinct for normal impact on the pristine surface at low T(s) and is independent of the CO(2) flux. The S(Theta) curves have been parametrized by analytic precursor models and Monte Carlo simulations have been conducted as well. The temperature dependence of the saturation coverage shows two structures which could be assigned to adsorption on pristine and intrinsic defect sites, respectively, in agreement with a prior thermal desorption spectroscopy study. The heat of adsorption E(d) for the pristine sites amounts to 34.0-5.4Theta, whereas for adsorption on the intrinsic defect sites E(d) of approximately 43.6 kJ/mol could be estimated. Thus, a kinetic structure-activity relationship was present.
A High Resolution Panoramic Video Monitoring System Based on Video Mosaicing (2008)

Difference from traditional video surveillance system,panoramic video surveillance system can provide viewers with a complete 360° degrees view.One embedded high resolution panoramic video surveillance system called KD-PVS is designed and realized.The paper introduces the multiple-camera configuration and video mosaicing algorithm.KD-PVS stitches the video data from multiple camera sources into the panoramic video.The system is very convenient for various situations,such as finance system,warehouses,prisons,mobile monitoring,etc,especially useful for indoor monitoring.
<i>Saccharomyces boulardii</i>CNCM I-745 in different clinical conditions (2014)

Saccharomyces boulardii CNCM I-745 is a good example for the statement that each probiotic needs to be taxonomically characterized and its efficacy and safety should be documented individually in different clinical settings.
Security Is All About Business, Not Technology (2002)

Abstract The year 2001 has been an adventure all right: stock market dives, missed revenue and earnings targets, shocking and tragic acts of physical terrorism, massive layoffs. The playing field in the technical infrastructure and security marketplace was leveled — a scorched earth policy swept away both profits and people on most corporate balance sheets. Nothing positive to promote out of that, except one thing: business reality. And if I do see a silver lining in the cloudy quarters ahead, I think it will be more security-aware corporate spending and more efficient use of technology and people. There is no room for excess in today's economy but progress must continue in the area of security.
Los primeros navegantes del océano Pacífico (2008)

?Como es posible que unos expedicionarios provistos de simples piraguas lograran recalar en las islas mas remotas del Pacifico? Un reciente hallazgo arqueologico en la isla de Efate, en Polinesia, arroja nueva luz sobre los lapita, un antiguo pueblo de navegantes que hace 3.000 anos inicio la colonizacion del vasto oceano
A Petri Net Synthesis Method (2010)

We motivate and study the synthesis of Petri nets. Petri net synthesis can avoid the state exploration problem by guaranteeing the correctness in the Petri net while incrementally expanding the net. For systems specified in Petri nets, this paper proposes a synthesis method. One major advantage of this synthesis technique is that the resultant ordinary Petri net is guaranteed to be structural live. If free choice (FC) (asymmetric choice (AC)) nets are structural live, with some additional constrains, their synthesis net is FC (AC) net and is structural live. Such results release the designer's burden for having to provide different methods for individual properties.
MMTD net -A Novel Optical Circuit Switch Architecture for Data Center Networks (2013)

We propose an optical interconnection architecture in both economy and energy efficiency called as MMTD net (MEMs based Multi-Tier Data center network). Numerical results show that this architecture is highly scalable, with low blocking probability and latency.
Network architectures for packet classification in wireless mobile network (2005)

In IEEE 802.16e, one of mechanisms for service differentiation over the air interface relies on packet classification in the mobile subscriber station (MSS) and the access point (AP). Classification involves matching multiple packet header fields against a possibly large set of classifier rules identifying the different service classes. In the Internet router, two important classification properties are fast lookup time and low memory consumption. In a wireless mobile network, there are frequent dynamic updates of classifier rules whenever MSS move among cells. Fast handoffs demand fast update time. Frequent updates between MSS and AP degrade the efficiency of network resources and classification performance. The paper considers distributed and centralized network architectures for classification, and analyzes the signaling loads for updating classifier rules during handoffs and their classification performance. We show that the distributed architecture has a better classification performance but generates more signaling load. The paper concludes that, for fast handoffs, a tradeoff between classification performance and the efficiency of network resources is needed.
Contactless recognition of respiration phases using web camera (2014)

The respiration rate provides important information about the health. Recently, contactless sensing devices are becoming popular. Methods based on a video-camera (web-camera) recording and subsequent signal processing are a good example. In this paper, we present a method for the extraction of respiration phases from the videosequence. We implemented a single-step Lucas-Kanade method for obtaining velocities and calculated a signal to noise ratio of pixel blocks for a selection of the tracking blocks. We measured ECG simultaneously with web-camera recording and compared ECG derived respiration with respiration derived by our method. Inspiration - expiration phases were also marked by three independent evaluators and used for validation of the method.
Noise-resistant adaptive scale using stabilized diffusion (2011)

Semi-locally adaptive models have appeared in medical imaging literature in the past years. In particular, generalized scale models (or g-scale for short) have been introduced to effectively overcome the shape, size, or anisotropic constraints imposed by previous local morphometric scale models. The g-scale models have shown interesting theoretical properties and an ability to drive improved image processing as shown in previous works. In this paper, we present a noise-resistant variant for g-scale set formation, which we refer to as stabilized scale (s-scale) because of its stabilized diffusive properties. This is a modified diffusion process wherein a well-conditioned and stable behavior in the vicinity of boundaries is defined. Yet, s-scale includes an intensity-merging dynamics behavior in the same manner as that found in the switching control of a nonlinear system. Basically we introduce, in the evolution of the diffusive model, a behavior state to drive neighboring voxel intensities to larger and larger iso-intensity regions. In other words, we drive our diffusion process to a coarser and coarser piecewise-constant approximation of the original scene. This strategy reveals a well-known behavior in control theory, called sliding modes. Evaluations on a mathematical phantom, the Brainweb, MR and CT data sets were conducted. The s-scale has shown better performance than the original g-scale under moderate to high noise levels.
Integrated optimization of semiconductor manufacturing: A machine learning approach (2012)

As semiconductor process nodes continue to shrink, the cost and complexity of manufacturing has dramatically risen. This manufacturing process also generates an immense amount of data, from raw silicon to final packaged product. The centralized collection of this data in industry information warehouses presents a promising and heretofore untapped opportunity for integrated analysis. With a machine learning-based methodology, latent correlations in the joint process-test space could be identified, enabling dramatic cost reductions throughout the manufacturing process. To realize such a solution, this work addresses three distinct problems within semiconductor manufacturing: (1) Reduce test cost for analog and RF devices, as testing can account for up to 50% of the overall production cost of an IC; (2) Develop algorithms for post-production performance calibration, enabling higher yields and optimal power-performance; and, (3) Develop algorithms for spatial modeling of sparsely sampled wafer test parameters. Herein these problems are addressed via the introduction of a model-view-controller (MVC) architecture, designed to support the application of machine learning methods to problems in semiconductor manufacturing. Results are demonstrated on a variety of semiconductor manufacturing data from TI and IBM.
Snow Stratigraphy and Water Equivalence Measured With an Active Microwave System (1980)

Abstract This paper reports on research on the relationship between the electromagnetic scattering properties and physical properties of snow-pack. An FM-CW active microwave radar system operating in the frequency range 8-12 GHz is used to scatter electromagnetic radiation from surface and subsurface stratigraphic layers in the snow-pack. The amplitude of the scattered radiation as a function of depth in the snow-pack can be correlated with such physical characteristics as density, hardness, stratigraphy, and moisture content. A direct determination of snow-pack water equivalence can be made from these observations.
Impacts of foot orthoses on pain and disability in rheumatoid arthritics (1996)

Rheumatoid arthritis (RA) frequently causes foot pain and swelling that affect ambulation. Pharmaceutical management of pain and disability is standard in clinical practice. The use of functional posted foot orthoses, as an adjunct to pharmaceutical treatment, is a promising treatment for managing foot pain and disability in RA. Its effectiveness, however, has not been rigorously evaluated. We performed a double-blind clinical trial using foot orthoses vs. placebo orthoses in the management of the rheumatoid arthritic foot, while subjects continued customary treatment. On the basis of findings of no effect on disability and pain measures, this study indicates no benefit of functional posted foot orthoses over placebos.
Schiff Reagent (1955)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSchiff ReagentD. E. Kramm and C. L. KolbCite this: Anal. Chem. 1955, 27, 7, 1076–1079Publication Date (Print):July 1, 1955Publication History Published online1 May 2002Published inissue 1 July 1955https://doi.org/10.1021/ac60103a012RIGHTS & PERMISSIONSArticle Views340Altmetric-Citations21LEARN 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 (520 KB) Get e-Alerts Get e-Alerts
Semantic acid properties in multidatabases using remote procedure calls and update propagations (1998)

Global ACID properties (Atomicity, Consistency, Isolation and Durability) may be implemented by using a DDBMS (Distributed Data Base Management System.) However, in this solution data availability is low. Further, data may be blocked, i.e. if some data are locked from a remote location, the data cannot always be unlocked when the connection to the data fails. This is not a problem when client/server technology is used because client/server technology only uses local locks, a reason why multidatabases and client/server technology are widely used in real-life distributed systems. However, the trouble with such systems is that they have no inherent global ACID properties. The objective of this paper is to illustrate how global semantic ACID properties, enforced by the transactions themselves, may be implemented on top of client/server technology. This is done to preserve high data availability. The global atomicity property is implemented by using retriable and compensatable subtransactions. The global consistency property must be implemented by the transactions themselves. The global isolation property is implemented by using countermeasures to isolation anomalies. The global durability property is implemented by using the durability property of the local DBMSs. The largest bank in Denmark, Den Danske Bank, has implemented all its applications using methods described in this paper. © 1998 John Wiley & Sons, Ltd.
Interactions between Acidic Crude Oil and Alkali and Their Effects on Enhanced Oil Recovery (2011)

Alkaline flooding is a method of enhanced oil recovery, in which alkali reacts with acidic components in the crude oil to form surface-active substances. In the present study, the interaction between alkali and crude oil was studied by measuring their physicochemical properties. A Fourier transform infrared (FTIR) spectrum of the crude oil reveals the presence of carboxylic acid groups leading to in situ formation of surfactants, which in turn decreases the interfacial tension between oil and water and other petrophysical properties responsible for better oil recovery. The effectiveness of alkali on enhanced oil recovery was tested with three sets of flooding experiments performed in the sand-pack systems. Substantial additional recoveries (more than 15% of original oil in place) over conventional water flooding were obtained in the present investigation.
Chess (1893)

Journal Article Chess Get access N. M. & A. N. M. & A. Search for other works by this author on: Oxford Academic Google Scholar Notes and Queries, Volume s8-IV, Issue 81, 15 July 1893, Page 45, https://doi.org/10.1093/nq/s8-IV.81.45e Published: 15 July 1893