gebhart/patrepeval huggingface dataset:
A study on the preparation of polymer/montmorillonite nano‐composite materials by photo‐polymerization (2001)

Abstract The preparation of polymer/montmorillonite intercalation composite materials was studied by two kinds of photo‐polymerization reaction (photo‐acid generation and photo‐radical generation). Small‐angle X‐ray diffraction was used for the structural characterization of montmorillonite contained in the products. Results indicated that, after chemical modification of montmorillonite, the monomer (methyl methacrylate) and the prepolymer ( m ‐cresol/HMMM) were able to intercalate into the layers of clay and to polymerize ‘in situ’, thus producing photo‐polymerized composite materials. The advantages and shortcomings of the method of photo‐polymerization for the preparation of these composite materials are discussed. © 2001 Society of Chemical Industry
Physicochemical and bacteriological analysis of the quality of sachet water and their source point (spring box) consumed in Bo city, Sierra Leone (2021)

This study was conducted to assess the physical, chemical, and bacteriological parameters of five- brand of sachet water, and their source point consumed in Bo city, southern Sierra Leone. The physical parameters include: pH, temperature, turbidity, total dissolved solid, and conductivity; chemical parameters include: Residual Chlorine, Magnesium, Potassium, Nitrite, Ammonia; and bacteriological parameters include: Escherichia coli, fecal coliform, and non-fecal coliform. Samples were collected and conveyed to the laboratory within 30 min. The result analyzed shows that the physical, chemical and bacteriological parameters of the Spring Box, and the five-brand were in conformity with the World Health Organization (WHO) guidelines. However, the pH of four-brand and the Spring Box fell below WHO standards (6.50-8.50), only Tee Spring had a pH which is within the permissible limit. The temperature of the Spring Box, and the five-Brand fell above the WHO standard (25.00°C). It can be said that the physical, chemical, and bacteriological parameters of all the five-brand and the Spring Box, are all within the WHO guidelines limit, and therefore fit for drinking. Key words: pH, WHO, brands, sachet, parameter.
SIMPLE-fying middlebox policy enforcement using SDN (2013)

Networks today rely on middleboxes to provide critical performance, security, and policy compliance capabilities. Achieving these benefits and ensuring that the traffic is directed through the desired sequence of middleboxes requires significant manual effort and operator expertise. In this respect, Software-Defined Networking (SDN) offers a promising alternative. Middleboxes, however, introduce new aspects (e.g., policy composition, resource management, packet modifications) that fall outside the purvey of traditional L2/L3 functions that SDN supports (e.g., access control or routing).
Parallel simulation: practice: contrasting distributed simulation with parallel replication: a case study of a queuing simulation on a network of transputers (1989)

As discrete event simulation programs become larger and more complex, the amount of computing power required for their execution is rapidly increasing. One way to achieve this power is by a employing a multiple processor network to run the simulation programs.Two approaches to the problem of assigning tasks to processors are described-environment partitioning distributed simulation, in which the tasks required to perform a simulation are assigned to processors in the network; and parallel replication, in which copies of the simulation program are assigned to processors, and the results of their execution aggregated. A simulation of an M/M/c queuing system has been implemented on networks of two and three transputers, using each approach. Heidelberger's statistical efficiency and the stabilization time of the system are used as metrics. The parallel replications tended to stabilize faster, but the statistical efficiencies were not significantly different.
Windows 7 & Office 2010 For Dummies - Portable Edition + Windows 7 For Dummies DVD - Book + DVD Bundle (2010)

Get a closer look at Windows 7 and Office 2010 with this one-of-a-kind book and DVD bundle!If you're looking for a quick overview of Windows 7 and Office 2010, this book and DVD bundle is for you. You'll cover the basics and get up and running - and fast - withthe Windows 7 & Office 2010 For Dummies, Portable Edition, a small-trim guide packed with easy tips and helpful advice on using the latest versions of Windows and Office, plus the two-hour Windows 7 For Dummies DVD. Filled with step-by-step instruction for completing the most essential Windows 7 tasks, this special Dummies bundle willl introduce you to Windows 7 and help you manage your applications, get connected to the Internet, establish an e-mail account, prevent common security issues, and so much more.
A New ELISA Method for the Rapid Quantification of Tamm-Horsfall Protein in Urine (1989)

The authors present a simplified enzyme-linked immunosorbent assay (ELISA) technique for the quantitative measurement of urinary Tamm-Horsfall protein (THP). Microtiter plates are coated with THP and urine samples at various dilutions without the need for a capture antibody. The bound glycoprotein is then incubated with a monoclonal anti-THP antibody and an alkaline phosphatase conjugated anti-IgG antibody. The assay was validated and gave reproducible results over a wide range of absorbance values. The sensitivity of the assay for THP was 2-5 micrograms/L, the coefficient of variation between assays 7.5%, and the day-to-day variability 11.1% for THP concentrations between 6.25 and 200 micrograms/L. THP excretion was assayed in five volunteers over five days comparing THP concentration in spot urines and in 24-hour urine collections.
Development and application by ink-jet printing of advanced packaging materials (2003)

High temperature ink-jet based printing processes (MicroJet) and custom polymer formulations have been developed for use in the fabrication of high-density microelectronic and optoelectronic packages. The enabling technologies for this work have been the development of a high-temperature (to 300/spl deg/C) print head and a set of UV-curing polymeric and oxide-filled formulations satisfying the rheological requirements for application by MicroJet. MicroJet processes have been utilized in the printing of solder bumps and vias, micro-optical interconnects, dielectric coatings, passive microelectronic elements, and adhesives. Potential applications of MicroJet processes and materials include: integrated circuit and chip-scale packaging, optical interconnect fabrication, printed wiring board manufacturing, and flat panel display assembly. The inherently data-driven nature of MicroJet processes lead to higher levels of process integration, lower costs, and increased manufacturing flexibility. Commercial platforms exist for print-on-the-fly solder deposition at rates of over 400 bumps/sec, and similar systems for high speed printing of polymers are under development. The range of packaging applications addressable by MicroJet technology is set to expand rapidly as printable feature sizes are reduced and as new MicroJetable material formulations are developed to meet a growing set of applications.
Photoluminescence study on defects in multicrystalline silicon (2007)

We report on spatially resolved luminescence measurements on ribbon-grown silicon samples. It is found that the band-edge luminescence shows anomalous temperature behavior, namely an increase in the radiation intensity with temperature. Phosphorous diffusion gettering is found to enhance this effect. The anomalous temperature behavior is attributed to nonradiative recombination governed by shallow traps. A shift in the phonon replica of the band edge luminescence peak has been observed and associated with tensile stress.
Nonvolatile ternary resistive switching memory devices based on the polymer composites containing zinc oxide nanoparticles (2018)

Nonvolatile ternary memory devices were fabricated from the composites polymer blends containing zinc oxide (ZnO) nanoparticles. When applying a negative bias on the top electrode, the fabricated devices with a simple sandwich structure of indium tin oxide (ITO)/composite polymer/aluminum (Al) exhibited three distinct resistance states, which could be labeled as "OFF", "ON1" and "ON2" for ternary data storage application. The ITO/polystyrene (PS) + ZnO/Al devices can endure 3 × 10<sup>4</sup> read-cycles and exhibit a retention time of 10<sup>4</sup> s. The resistance-temperature dependence at different resistance states was investigated to confirm the temperature-dependent properties. The resistance of the "OFF" and "ON1" state reveals negative temperature dependence, manifesting a typical semiconductor characteristic. The resistance of the "ON2" state exhibits positive temperature dependence, showing metallic properties.
Global contrast based salient region detection (2011)

Automatic estimation of salient object regions across images, without any prior assumption or knowledge of the contents of the corresponding scenes, enhances many computer vision and computer graphics applications. We introduce a regional contrast based salient object detection algorithm, which simultaneously evaluates global contrast differences and spatial weighted coherence scores. The proposed algorithm is simple, efficient, naturally multi-scale, and produces full-resolution, high-quality saliency maps. These saliency maps are further used to initialize a novel iterative version of GrabCut, namely SaliencyCut, for high quality unsupervised salient object segmentation. We extensively evaluated our algorithm using traditional salient object detection datasets, as well as a more challenging Internet image dataset. Our experimental results demonstrate that our algorithm consistently outperforms 15 existing salient object detection and segmentation methods, yielding higher precision and better recall rates. We also show that our algorithm can be used to efficiently extract salient object masks from Internet images, enabling effective sketch-based image retrieval (SBIR) via simple shape comparisons. Despite such noisy internet images, where the saliency regions are ambiguous, our saliency guided image retrieval achieves a superior retrieval rate compared with state-of-the-art SBIR methods, and additionally provides important target object region information.
Acidic hydroxyl groups in zeolites X and Y: a correlation between infrared and solid-state NMR spectra (1994)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcidic hydroxyl groups in zeolites X and Y: a correlation between infrared and solid-state NMR spectraB. Gil, E. Broclawik, J. Datka, and J. KlinowskiCite this: J. Phys. Chem. 1994, 98, 3, 930–933Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://pubs.acs.org/doi/10.1021/j100054a031https://doi.org/10.1021/j100054a031research-articleACS PublicationsRequest reuse permissionsArticle Views298Altmetric-Citations36LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
Control Techniques for DC-DC Buck Converter with Improved Performance (2011)

The switched-mode dc-dc converters are some of the most widely used power electronics circuits for its high conversion efficiency and flexible output voltage. These converters used for electronic devices are designed to regulate the output voltage against the changes of the input voltage and load current. This leads to the requirement of more advanced control methods to meet the real demand. Many control methods are developed for the control of dc-dc converters. To obtain a control method that has the best performances under any conditions is always in demand. Conventionally, the dc-dc converters have been controlled by linear voltage mode and current mode control methods. These controllers offer advantages such as fixed switching frequencies and zero steady-state error and gives a better small-signal performance at the designed operating point. But under large parameter and load variation, their performance degrades. Sliding mode (SM) control techniques are well suited to dc-dc converters as they are inherently variable structure systems. These controllers are robust concerning converter parameter variations, load and line disturbances. SM controlled converters generally suffer from switching frequency variation when the input voltage and output load are varied. This complicates the design of the input and output filters. The main objective of this research work is to study different control methods implemented in dc-dc converter namely (linear controllers, hysteresis control, current programmed control, and sliding mode (SM) control). A comparison of the effects of the PWM controllers and the SM control on the dc-dc buck converter response in steady state, under line variations, load variations is performed.
A high-performance 85-119 GHz GCPW MMIC low noise amplifier (2002)

In this paper, a high-performance four-stage MMIC low noise amplifier based on InP HEMT and grounded CPW (GCPW) technology is presented. The LNA exhibits a measured gain of 20/spl plusmn/3 dB from 85 to 119 GHz, a 33% bandwidth. The noise figure is 3.7 dB at 93 GHz. The measured amplifier P/sub 1 dB/ is 10 mW at 98 GHz.
Numerical analysis of millimeter-wave dielectric lens antenna with matching slots (2012)

In this paper, a millimeter-wave lens antenna with matching slots is simulated by the Finite-Difference Time-Domain (FDTD) method and Aperture Integration (AI) method, respectively. The antenna radiation patterns obtained by the FDTD method are compared with those of the AI method. It is found that the FDTD method is more accurate than the AI method. In addition, the effects of matching slots on the radiation performance and reflection coefficient of lens antenna are investigated.
Comments on: Transient Elastooptic Effects and Q-Switching Performance in Lithium Niobate and KD*P Pockels Cells (1971)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text W. D. Fountain, "Comments on: Transient Elastooptic Effects and Q-Switching Performance in Lithium Niobate and KD*P Pockels Cells," Appl. Opt. 10, 972-973 (1971) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Riser Tower Installation (2002)

Abstract The paper describes the offshore operations and associated engineering - riser base and umbilical arch installation, surface tow, upending, docking, deballasting, etc - that led to the successful installation of the three riser towers in the deepwater environment of the Girassol field. The paper concludes on the feasibility of installing riser towers in different field environments. Introduction The riser towers, designed, fabricated and installed by the Alto Mar Girassol consortium (AMG) for the Girassol field, are a new and unique design. The riser tower concept was originally proposed in October 1997 as part of the design competition for the Girassol project. In July 1998, TotalFinaElf Angola and its partners, finally selected the riser tower solution for the Girassol UFL (umbilical flowline) system. The engineering team had to design the riser towers primarily to meet stringent thermal insulation requirements but also to ensure that the structure would be installable with conventional installation spreads. This challenge was overcome by developing safe and efficient installation methods verified by proper analysis and testing. The three riser towers were fabricated at the Angolan yard at Lobito and delivered on schedule to be towed to the Girassol field. At this stage of the project, those who had put so much efforts in the concept had to go through a very stressful period. Meanwhile the offshore construction team carried out the operation successfully three times in less than 25 days, finishing one day prior to the arrival of the floating production, storage and offloading (FPSO) unit on site. This success and the experience gained from the Girassol project, firmly establishes the riser tower concept as an important solution for deep and ultra-deep field development projects. The flexibility of the concept makes adaptation to greater water depths and hasher meteocean conditions relatively straightforward. Brief description of the riser tower Fluid and piping system The riser tower consists of following:Four production risers (8in)Four gas lift risers (3in)Two gas/water injection risers (8in)Two service line risers (2in) Riser tower main components The riser tower integrates the following components (fig a-1):A buoyancy tank (fig a-2) with a support balcony for the flexible risers and gooseneck spools to ensure flow continuity.A bundle (fig a-3) comprised of a 22in steel central core pipe with production, injection, gas lift and service risers placed inside sets of buoyancy/insulation foam elements.A taper joint and transition pieces between the buoyancy tank and the bundle.Two independent umbilical support arches (fig a-4) to allow installation of up to four umbilicals per tower.A riser foot structure (fig a-5) with a male Rotolatch connector, a temporary buoyancy tank and riser configuration designed to interface and ensure flow continuity with the static flowline system through flanged rigid spool pieces.A riser tower anchor (RTA) (fig a-6) embedded in the seafloor with a female receptacle for the Rotolatch connector and two sheave mechanisms used to pull down the tower on its anchor.
Solving the problem of cascading errors (2006)

The end-to-end performance of natural language processing systems for compound tasks, such as question answering and textual entailment, is often hampered by use of a greedy 1-best pipeline architecture, which causes errors to propagate and compound at each stage. We present a novel architecture, which models these pipelines as Bayesian networks, with each low level task corresponding to a variable in the network, and then we perform approximate inference to find the best labeling. Our approach is extremely simple to apply but gains the benefits of sampling the entire distribution over labels at each stage in the pipeline. We apply our method to two tasks -- semantic role labeling and recognizing textual entailment -- and achieve useful performance gains from the superior pipeline architecture.
Characterization of degradation process of sucrase-isomaltase in rat jejunum with monoclonal-antibody-based enzyme-linked immunosorbent assay (1988)

As shown previously, during degradation of sucrase-isomaltase in rat jejunum, degradation of the sucrase active site occurs before that of isomaltase active site [Goda & Koldovský (1985) Biochem. J. 229, 751-758]. To characterize further the process of sucrase-isomaltase degradation in jejunum, we determined the amounts of immunoreactive sucrase-isomaltase in rat jejunum by using a monoclonal-antibody-based enzyme-linked immunosorbent assay. By employing two alternative monoclonal antibodies (one reacting with the sucrase subunit and the other reacting with the isomaltase subunit), the amount of antigen-containing sucrase subunit and the amount of antigen-containing isomaltase subunit were separately quantified. In both upper and lower jejunum of rats, the amount of antigen-containing isomaltase subunit was always higher than the amount of antigen-containing sucrase subunit. This difference was attributable mainly to a degradation product of sucrase-isomaltase, which was identified as isomaltase monomer. Occlusion of pancreatic ducts for 18 h eliminated the difference between the amount of antigen-containing sucrase subunit and the amount of antigen-containing isomaltase subunit in both upper and lower jejunum. In jejunum of control animals, the molar ratio of sucrase subunit to isomaltase subunit was estimated to be 0.32-0.52, indicating that quite a large proportion of sucrase-isomaltase (48-68%) is present as degradation products (e.g. isomaltase monomer). These results support the model of degradation process of sucrase-isomaltase in brush-border membranes of rat jejunum, whereby degradation of sucrase subunit by the action of pancreatic proteinase(s) precedes degradation of isomaltase subunit.
Multi-channel Portable Functional Electrical Stimulation (FES) System For Clinical Usage (2005)

A portable 30 channel FES system and a very flexible multi-strand percutaneous electrode were developed. After clinical evaluation, official permission was issued from the Ministry of Health and Welfare of Japan. Then they are now commer- cially available in Japan from March, 1991.
Exaggerated grain growth and improved properties of Y<sub>1</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub>by Pt addition (1988)

Abstract Superconducting and mechanical properties of Y1 Ba2Cu3 O7 can be improved by the use of sintering aids. 0·2 wt% of finely divided laser-ablated platinum powder has been mixed with the parent material and produced a dense product with exaggerated grain growth and improved critical current density and Vickers hardness. At higher concentrations of platinum, while the mechanical properties are further improved, the increased density appeared to inhibit access of oxygen for the tetragonal to orthorhombic phase transition and the current density was reduced.
Hunting of Wildlife in Tropical Forests : Implications for Biodiversity and Forest Peoples (2000)

The study addresses the importance of wildlife to people, and as a resource of nutritional, economic, and socio-cultural values, and examines the complexities of hunting in tropical forests. It also expresses that today, such hunting is rarely sustainable, because of declining forest areas, which decreases wildlife populations; because of changes among human populations in the tropical forests, who have increasingly become more sedentary; because of cultural changes, where social taboos against hunting certain species are breaking down, and systems of traditional hunting territories are disappearing; and, because environmental economic changes, prod the commercialization of wildlife hunting in these areas. The study explores the multifaceted, and complex problem of hunting, suggesting solutions must be area specific, based on detailed knowledge of hunting patterns, ecology, and local socio-cultural conditions. Recommendations include: establishment of national networks to manage protected, and extractive reserves areas, to supply subsistence needs to local hunting communities; establish land uses to support protected/extractive reserves areas in partnership with local communities; enact, comply, and enforce regulations to prevent exploitation by timber companies' workers; and, encourage participatory approaches among non-governmental organizations, academic institutions, and the international community at large.