gebhart/patrepeval huggingface dataset:
Availability-guaranteed service provisioning with shared-path protection in optical WDM networks (2004)

We develop an availability model to capture network failure characteristics and resource information for each link. Based on this link-state model, we propose an availability-guaranteed-connection-provisioning algorithm which significantly improves connection reliability and uses resource efficiently.
The Effect of Selective Availability on Differential GPS Corrections (1990)

The newer Block II GPS satellites have the capability to control the accuracy of the Standard Positioning Service signals by a combination of dithering the satellite clock and manipulating the ephemeris data. This capability is called Selective Availability (SA). Differential GPS operation greatly reduces the effects of SA, in addition to the effects of ionospheric, tropospheric, and other slowly-varying errors, for users in a local area around a reference station. A major technical issue in the design of reference stations has been the correction update rate. It has been assumed until recently that new differential GPS corrections are required about once every 10 s to maintain 5–10 m service accuracy. Until the recent launch of the new Block II satellites, there has been no firm evidence that this update rate would be adequate. This paper presents statistical analysis of recently obtained data sets from Block II satellites, specifically position and velocity variations and correlation times. Pseudorange corrections generated by differential reference station equipment using these signals are applied to the pseudoranges from a navigation receiver to obtain estimates of the effect of correction update rate on differential GPS performance.
Synthesis and Optical Properties of Tetraaryl‐1,4‐dihydropyrrolo[3,2‐<i>b</i>]pyrroles (2013)

Abstract A practical synthesis of nonfused 1,4‐dihydropyrrole[3,2‐ b ]pyrroles in a domino reaction of aldehydes, primary amines, and butane‐2,3‐dione has been discovered. Six bonds are formed in a tandem process, which gives rise to tetrasubstituted pyrrole[3,2‐ b ]pyrroles—the least studied among heteropentalenes. Unparalleled simplicity and versatility of this one‐pot reaction, no chromatography, as well as superb optical properties have the potential to make 1,4‐dihydropyrrole[3,2‐ b ]pyrroles the molecules of choice for various applications. As a proof of principle, cell uptake of selected dyes was demonstrated.
Improving the Two-Pass Resampling Algorithm (2003)

Abstract The Catmull-Smith two-pass resampling algorithm simplifies the nontrivial reconstruction of a transformed two-dimensional image by decomposing the transformation into two one-dimensional passes. We present a theoretically motivated modification to this algorithm that provides improved image quality. For the case of projective transformations, this improvement results in a final algorithm that is more robust and accurate than the original while even affecting correctness in some cases.
Advanced Epitaxial Ferrite Devices. (1977)

Abstract : Using a class of materials referred to as hexagonal ferrites, magnetically tunable filters in the millimeter wave range becomes a practical possibility. Becuase of their large inherent magnetic anisotropy, the hexaferrites can be biased into the millimeter wave range with relatively small external fields. It was the purpose of this contract to explore the use of epitaxial films of hexagonal ferrites as an alternative to bulk grown single crystal material. Since epitaxial films can be grown with a damage-free surface, no mechanical handling would be required. Bandstop filters using this material were fabricated and the characteristics were measured. Using parallel resonance a bandstop response at 39.1 GHz was obtained with an unloaded Q of 400. In perpendicular resonance, the film was linearly tuned across the 50 to 60 GHz range with a variable field which did not exceed 2000 gauss. In both cases only a minimum of mechanical processing was used. (Author)
Antioxidative Properties of Procyanidins B-1 and B-3 from Azuki Beans in Aqueous Systems (1988)

Two kinds of dimeric procyanidins were isolated in pure form from azuki beans by preparative HPLC. They were identified as procyanidins B-1 and B-3, on the basis of their UV, IR FAB-MS and 1H-NMR spectra, and an analysis of the acid hydrolyzed products. The procyanidins were evaluated as antioxidants for linoleic acid in an aqueous linoleic acid-β-carotene model system. In the range of the tested concentrations (5 × 10−5~100 × 10−5%) and pH values (7~9), they showed remarkable antioxidative activities. Their activities were much stronger than those of such commercially available natural antioxidants as ascorbic acid, γ-oryzanol, gallic acid, l-tryptophan, (+)-catechin and d-α-tocopherol. The hydrogen- or electron-donating activities of procyanidins to the DPPH radical in a 50% ethanol solution were also stronger than those of ascorbic acid and d-α-tocopherol.
<title>Chemical monitors based on surface-enhanced raman scattering</title> (1993)

This paper presents an overview of the development of chemical monitors using the surface- enhanced raman scattering (SERS) technique. The SERS effect is based on recent experimental observations, which have indicated enhancement of the Raman scattering efficiency by factors up to 10<SUP>8</SUP> when a compound is adsorbed on rough metallic surfaces having submicron protrusions. The focus of our research efforts is on the development of SERS-active sensors and instrumentation capable of field analysis and remote sensing.
New HSP27 inhibitors efficiently suppress drug resistance development in cancer cells (2016)

Drug resistance is an important open problem in cancer treatment. In recent years, the heat shock protein HSP27 (HSPB1) was identified as a key player driving resistance development. HSP27 is overexpressed in many cancer types and influences cellular processes such as apoptosis, DNA repair, recombination, and formation of metastases. As a result cancer cells are able to suppress apoptosis and develop resistance to cytostatic drugs. To identify HSP27 inhibitors we follow a novel computational drug repositioning approach. We exploit a similarity between a predicted HSP27 binding site to a viral thymidine kinase to generate lead inhibitors for HSP27. Six of these leads were verified experimentally. They bind HSP27 and down-regulate its chaperone activity. Most importantly, all six compounds inhibit development of drug resistance in cellular assays. One of the leads - chlorpromazine - is an antipsychotic, which has a positive effect on survival time in human breast cancer. In summary, we make two important contributions: First, we put forward six novel leads, which inhibit HSP27 and tackle drug resistance. Second, we demonstrate the power of computational drug repositioning.
<title>Vision-guided, semiautonomous system applied to a robotic coating application</title> (1997)

This paper describes a new semi-autonomous, calibration-free system which integrates a user-friendly graphical interface, several cameras, a laser pointer mounted on a two-axis pan/tilt unit, and a six degree-of-freedom robot. The details of the system are discussed in reference to the problem of coating a workpiece of unknown geometry that is positioned arbitrarily with respect to the robot and the vision sensors. The remote user specifies the region of the workpiece that is to be coated simply by 'pointing' and 'clicking' on the region of interest as it appears in a single image on the user's computer monitor. By means of a simple and robust control strategy, the laser pointer mounted on the pan/tilt unit is autonomously actuated to a user-specified number of approximate positions in the region of the surface of interest. This is used to create compatible maneuver objectives in the participating vision sensors. Then, using the method of camera-space manipulation, the robot is controlled to make several passes across the region. Regardless of the geometry of the workpiece, the manipulated nozzle always remains perpendicular to the surface at a user- specified distance from the surface. Upon completion of the coating process, the laser pointer is again actuated to pass through a specified number of points on the new surface. This information is used to make a very precise inference of the thickness of the build-up of the coat that has been applied. If the coat is not sufficiently thick, the robot makes more passes as required. The paper also presents experimental results of the high accuracy of position and orientation control of the manipulated tool, as well as the depth inference of the surface coat applied.
1-(Arylthio)methanesulfonamides (1976)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1-(Arylthio)methanesulfonamidesChristian T. Goralski and Thomas C. KlinglerCite this: J. Chem. Eng. Data 1976, 21, 2, 237–239Publication Date (Print):April 1, 1976Publication History Published online1 May 2002Published inissue 1 April 1976https://pubs.acs.org/doi/10.1021/je60069a005https://doi.org/10.1021/je60069a005research-articleACS PublicationsRequest reuse permissionsArticle Views92Altmetric-Citations5LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Multi-stage parameter-constraining inverse transient analysis for pipeline condition assessment (2018)

Abstract Fault detection in water distribution systems is of critical importance for water authorities to maintain pipeline assets effectively. This paper develops an improved inverse transient analysis (ITA) method for the condition assessment of water transmission pipelines. For long transmission pipelines ITA approaches involve models using hundreds of discretized pipe reaches (therefore hundreds of model parameters). As such, these methods struggle to accurately and uniquely determine the many parameter values, despite achieving a very good fit between the model predictions and measured pressure responses. In order to improve the parameter estimation accuracy of ITA applied to these high dimensional problems, a multi-stage parameter-constraining ITA approach for pipeline condition assessment is proposed. The proposed algorithm involves the staged constraining of the parameter search-space to focus the inverse analysis on pipeline sections that have a higher likelihood of being in an anomalous state. The proposed method is verified by numerical simulations, where the results confirm that the parameters estimated by the proposed method are more accurate than the conventional ITA. The proposed method is also verified by a field case study. Results show that anomalies detected by the proposed methods are generally consistent with anomalies detected by ultrasonic measurement of pipe wall thickness.
Development of mercuric iodide uncooled x ray detectors and spectrometers (1990)

The results obtained in the development of miniature, lowpower, light weight mercuric iodide, HgI2, x ray spectrometers for future space missions are summarized. It was demonstrated that HgI2 detectors can be employed in a high resolution x ray spectrometer, operating in a scanning electron microscope. Also, the development of HgI2 x ray detectors to augment alpha backscattering spectrometers is discussed. These combination instruments allow for the identification of all chemical elements, with the possible exception of hydrogen, and their respective concentrations. Additionally, further investigations of questions regarding radiation damage effects in the HgI2 x ray detectors are reported.
TH-C-T-6C-08: Initial Experiences with a Dynamic Treatment Simulation System (2005)

Purpose: To present our initial experience with an in-house developed dynamic treatment simulation platform, PortSim, and evaluate its performance characteristics in the context of conventional and IMRT simulation. Method and Materials: PortSim is a software package that interfaces with a conventional simulator that operates in fluoroscopic mode. A frame grabber is used to obtain live images from the image intensifier (II). The patient's treatment plan, including DRRs, beams, contours and MLCs can be imported into the PortSim environment. The distortion corrected fluoroscopic images can be compared against the DDRs and verify beam and isocenter placement. Both static and dynamic MLCs can be superimposed on the fluoroscopic images to verify beam aperture prior to treatment. Volume contours can also be projected to verify target position and coverage. Patient setup and targeting uncertainty can be quantified at the time of the simulation. The complete simulation process can be recorded for later review and analysis. Results: The PortSim system enabled us to increase our simulation throughput by 30%. It provided a film-less environment for patient simulation and verification. The maximum image distortion correction error is less than 2 mm, making the digital images readily usable for review and planning purposes. Physician subjective error in reviewing films was significantly reduced due to the improved image quality, direct overlay of DRR and contours. The software allows for DICOM import and export to other devices, including printers. Conclusion: We have developed a comprehensive software package that allows us to improve significantly our film review during the patient's treatment simulation. With features such as direct overlay, side-by- side display on the same screen and improved image quality we can perform simulations more efficiently and more accurately. The simulation process can be recorded and provide valuable information for improving field design and patient immobilization techniques.
Spatial Sparsity Induced Temporal Prediction for Hybrid Video Compression (2007)

In this paper we propose a new motion compensated prediction technique that enables successful predictive encoding during fades, blended scenes, temporally decorrelated noise, and many other temporal evolutions which force predictors used in traditional hybrid video coders to fail. We model reference frame blocks to be used in motion compensated prediction as consisting of two superimposed parts: one part that is relevant for prediction and another part that is not relevant. By performing prediction in a domain where the video frames are spatially sparse, our work allows the automatic isolation of the prediction-relevant parts. These are then used to enable better prediction than would be possible otherwise. Our sparsity induced prediction algorithm (SIP) generates successful predictors by exploiting the non-convex structure of the sets that natural images and video frames lie in. Correctly determining this non-convexity through sparse representations allows better performance in hybrid video codecs equipped with the proposed work
Identification and development of optimum SiC whiskers for silicon nitride matrix composites (1989)

Using micromechanics modeling and observed increases in fracture toughness for whisker-reinforced alumina and silicon nitride, SiC whisker strengths were calculated. Based on those results, flaw sizes were estimated and compared to scanning and transmission electron microscopy observations of the structure in typical whiskers. The sizes of the strength-limiting flaws were calculated to be in the range of 0.1 and 0.4 {mu}m, which corresponds to the size of defects observed in many of the current commercial whiskers. Defects identified in this size range include the core regions, which are accumulations of smaller inclusions as well as voids located within some whisker types. Another defect that decreases whisker strength is excessive surface roughness (usually associated with crystallographic phase changes) that results in stress concentrations. Calculations indicate that if high-strength SiC whiskers were made available by eliminating strength-limiting flaws, silicon nitride composites with toughnesses (K{sub IC}) {gt}15 MPa(m){sup 1/2} may be realized. 23 refs., 6 figs., 3 tabs.
Titanium and Niobium Polysulfide Electrodes for Lithium/Metal Sulfide Secondary Batteries (2014)

Achieving high capacity by making use of multi electron processes has been desired to enhance the energy density of lithium-ion batteries. Recently, layered lithium metal oxides with more than one equivalent of lithium per transition metal have been actively researched and developed as new positive-electrode materials with capacities of more than 200 mAh g −1 . However, it is still difficult to achieve reversible capacity of more than 300 mAh g −1 . To achieve the high capacity, the redox reaction of anions in addition to that of transition metals is needed to be used; that is, the charge and discharge with processes involving more than two-electrons should be required in materials. Therefore, the challenging is development of new electrode active materials which can show redox reactions with more than two electron processes. Metal sulfides are attractive candidates for positive-electrode materials [1, 2]. Their high capacities originate from charge and discharge processes that involve more than one electron; for example, crystalline TiS 3 charges and discharges with high reversible capacities of greater than 300 mAh g −1 , which corresponds to ca. 1.5 electron redox reaction. In this study, amorphous titanium polysulfides a-TiS x (x = 3, 4) and niobium polysulfides a-NbS y (y = 3, 4, 5) were prepared by a mechanical milling process and their electrochemical properties were examined using the cells with carbonate-based electrolytes. Amorphous titanium and niobium polysulfides were mechanochemically synthesized at room temperature using a planetary ball mill apparatus. Sulfur (S 8 ) and titanium disulfide (TiS 2 ) or niobioum disulfide (NbS 2 ) were used as starting materials. The XRD measurements indicated that the diffraction peaks attributable to S 8 and TiS 2 or NbS 2 disappeared by mechanical milling, suggesting that the samples became amorphous. Fig. 1 shows charge-discharge curves of the cells using crystalline NbS 2 reagent, amorphous NbS 3 , NbS 4 , and NbS 5 . The capacity increases with increasing sulfur/metal ratio and the cell using amorphous NbS 5 shows a high capacity of ca 600 mAh g -1 . The amorphous TiS 4 discharged and charged with a high reversible capacity of ca. 700 mAh g -1 in the 1.5–3.0 voltage range [3]. The cell using the amorphous metal polysulfides charged and discharged despite of the use of a carbonate-based electrolyte. Coulombic efficiency of the composite was higher than that of a sulfur electrode because the dissolution of the polysulfide into electrolytes was suppressed. Designing amorphous polysulfides is an effective way to develop novel sulfide-based electrode materials with high capacity. References [1] M. S. Whittingham, Prog. Solid State Chem. 12 (1978)41–99. [2] M.H. Lindic, H. Martinez, A. Benayad, B. Pecquenard, P. Vinatier, A. Levasseur, D. Gonbeau, Solid State Ionics , 176 (2005) 1529–1537. [3] A. Sakuda, N. Taguchi, T. Takeuchi, H. Kobayashi, H. Sakaebe, K. Tatsumi, Z. Ogumi, Electrochem. Commun. 31 (2013) 71–75 .
The Effect of Additives on the Setting Properties of a Glass-Ionomer Cement (1982)

Studies of the setting behavior of glass ionomer cements formed from either glass powders and polyacid solutions or from glass-dry polyacid blends mixed with water have been carried out using an oscillating rheometer. Certain acids accelerate the setting rate, but none is as effective as D-tartaric acid. Bases added to the cements slow the setting reactions by partially neutralizing the acid.
A Craniomaxillofacial Surgical Assistance Workstation for Enhanced Single-Stage Reconstruction Using Patient-Specific Implants (2016)

This approach demonstrated improvement in surgical time and accuracy of CCI-based craniomaxillofacial reconstruction compared with previously reported methods. The craniomaxillofacial surgical assistance workstation will provide craniofacial surgeons a computer-assisted technology for effective and efficient single-stage reconstruction when exact craniofacial bone defect sizes are unknown.
Passive and Hybrid Mode-Locking of an External-Cavity GaInN Laser Diode Incorporating a Strong Saturable Absorber (2010)

We produced clean 3-ps-duration optical pulses from a bi-sectional GaInN laser diode with an external-cavity configuration. The peak power of the optical pulses was 3 W under passive and hybrid mode-locking at a 1 GHz repetition rate.
Aggressive Error Recovery for TCP over wireless links (2000)

TCP's congestion control handless packet loss due to congestion in the network. Over wireless links, packet loss may also be due to signal fading. Wireless LAN traffic under High Bit Error rate (BER) suffers great throughput degradation due to the cu
Design, fabrication and characterization of a capacitive micromachined ultrasonic probe for medical imaging (2005)

In this paper we report the design, fabrication process, and characterization of a 64-elements capacitive micromachined ultrasonic transducer (cMUT), 3 MHz center frequency, 100% fractional bandwidth. Using this transducer, we developed a linear probe for application in medical echographic imaging. The probe was fully characterized and tested with a commercial echographic scanner to obtain first images from phantoms and in vivo human body. The results, which quickly follow similar results obtained by other researchers, clearly show the great potentiality of this new emerging technology. The cMUT probe works better than the standard piezoelectric probe as far as the axial resolution is concerned, but it suffers from low sensitivity. At present this can be a limit, especially for in depth operation. But we are strongly confident that significant improvements can be obtained in the very near future to overcome this limitation, with a better transducer design, the use of an acoustic lens, and using well matched, front-end electronics between the transducer and the echographic system.
OBIG: the Architecture of an Output Buffered Switch with Input Groups for Large Switches (2007)

Large, fast switches require novel approaches to architecture and scheduling. In this paper, we propose the <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Output</i> <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Buffered</i> <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Switch</i> <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">with</i> <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Input</i> <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Groups</i> (OBIG). We present simulation results, discuss the implementation, and show how our architecture can be used to build single-stage (flat) switches with multi-terabit-per-second throughput and hundreds of ports.
A New ELISA for Use in a 3-ELISA System to Assess Concentrations of VEGF Splice Variants and VEGF110 in Ovarian Cancer Tumors (2008)

VEGF(165), VEGF(121), and VEGF(110) may be present at significant amounts in ovarian cancer tumors.