gebhart/patrepeval huggingface dataset:
Suggestion and Feasibility Study for Massively Parallel Back-To-Back System (2001)

This paper presents new concept of BTB. The main feature of proposed BTB is “Massively Parallel”. This system consists of a number of small or medium-capacity inverter units and they are connected in parallel. The concept of transmission power control, when unit fault occurs and BTB losses are minimalized, are investigated using MATLAB. The method for EMTP model of the new BTB is investigated, too. After this research, the new BTB system turns out to be very promising for large power system application because loss of the system is very small rather than conventional BTB using VSC (Voltage Source Converter), it can keep operating even if a inverter unit fails and it can improve power transmission capabillity.
Distortion analysis of stencil masks with stress-relief structures (1995)

We present an exact solution to an axially symmetric continuum model of distortion in stencil masks. A correction procedure is studied where the pattern displacement vectors are calculated from a linear approximation to the pattern distribution function. For practical mask patterns this can reduce distortion to near the levels needed for very large scale integration. Additional gains can be achieved by using a ring of perforations around the integrated circuit field to reduce stress. Corrected distortion figures below 20 nm on a 60 mm mask seem possible.
Unmanned Aircraft System traffic management: Concept of operation and system architecture (2016)

Within the past few years, civilian demand for small unmanned aircraft systems (sUAS), commonly referred to as drones, has skyrocketed. The passage of the Federal Aviation Administration (FAA) Modernization and Reform Act in 2012 acknowledged this fact, and has since prompted expedited research and development for civilian sUAS. As proposed at a recent National Aeronautics and Space Administration (NASA) Convention, central to the safe and efficient operations of sUAS will be an unmanned aircraft system traffic management (UTM) system. Such a UTM system will borrow fundamental ideas from large-scale air-traffic control, albeit with several key differences that provide for sUAS which vary in method of control, maneuverability, function, range, and operational constraints. Ultimately, an expansion of UTM infrastructure, a decentralization of governing authority over sUAS operations, and the establishment of a web-interface for pilots to submit flight plans and access crucial data will allow for sUAS operations to shift from being a science-fiction gimmick to an element of daily life. The major objectives of this paper are to: (1) define what a UTM system is; (2) review current UTM practice from industry partners; (3) describe how sUAS pilots would use a typical UTM system, and who has authority over UTM; and (4) determine what physical architecture is required in a UTM system which handles a large variety of sUAS.
Ellipsometric measurement of solid fluorocarbon film thickness on magnetic recording media (1997)

Solid fluorocarbon films were deposited on carbon overcoated magnetic recording media. The films were made by direct ion beam deposition of fluorocarbon monomers. This paper presents ellipsometric measurements on films over a range of thickness from 0.5 to 12.5 nm. Film thickness was measured using ellipsometry, and the chemical composition was studied using x-ray photoelectron spectroscopy (XPS). A high-speed ellipsometer was set up to map thickness over the whole media surface. The ellipsometric angle Δ was found to be linearly related with the film thickness. Since the escape depth of the XPS is comparable to the film thickness, the XPS senses the underlying carbon as well as the carbon in the film. As a result, the apparent ratio of fluorine to carbon depends on the film thickness. The ion beam deposition technique can be used to produce films with controlled thickness and uniform composition.
Synthesis and Characterization of Thermosetting Furan-Based Epoxy Systems (2014)

Renewable alternatives to petroleum-based thermosetting polymers have drawn significant attention due to potential positive economic and ecological impact. New materials should mimic the rigid, phenylic structure of incumbent high-performance thermoset monomers. Furans derived from cellulose and hemicellulose are promising candidates for phenyl replacement. The synthesis of furan-based diepoxies is challenging, and direct property comparisons of thermosets prepared using furanyl and phenyl-based epoxy monomer analogues are required. In this work, analogous furanyl-based and phenyl-based diepoxy monomers were synthesized, and thermosets were prepared using amine curing agents. A structure–property study showed that furan-based polymers possess improved Tg (Δ = 8–16 °C) and improved glassy modulus (Δ = 0.1 to 0.6 GPa) relative to their phenylic analogues. The furan ring has thus been demonstrated to be a viable building block for renewable high-performance epoxies, with potential for application in other thermosetting polymers.
Stereocontrolled total synthesis of (.+-.)-pentenomycins. I-III, their epimers, and dehydropentenomycin I (1982)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereocontrolled total synthesis of (.+-.)-pentenomycins. I-III, their epimers, and dehydropentenomycin IAmos B. Smith III, Stephen J. Branca, Nancy N. Pilla, and Michael A. GuaciaroCite this: J. Org. Chem. 1982, 47, 10, 1855–1869Publication Date (Print):May 1, 1982Publication History Published online1 May 2002Published inissue 1 May 1982https://pubs.acs.org/doi/10.1021/jo00349a009https://doi.org/10.1021/jo00349a009research-articleACS PublicationsRequest reuse permissionsArticle Views1563Altmetric-Citations83LEARN 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
Abdominal Aortic Aneurysm Expansion (2004)

Annual, or less frequent, surveillance intervals are safe for all AAAs < or =45 mm in diameter. Smoking increases AAA growth, but atherosclerosis plays a minor role.
Treatment of palmar hyperhidrosis using tap water iontophoresis: local experience. (1999)

To evaluate the efficacy and safety of tap water iontophoresis in the treatment of severe idiopathic palmar hyperhidrosis, nine Chinese patients with severe palmar hyperhidrosis that had failed to respond to topical aluminium chloride were given 6 weeks' treatment with tap water iontophoresis at the Social Hygiene Service, Department of Health, Hong Kong. The reduction in sweat output was assessed objectively and subjectively. The mean objective reduction in sweat output was 49%, 51%, 26%, and 22% at week 3, 6, 10, and 12, respectively, since the start of treatment with tap water iontophoresis The mean subjective improvements were 43%, 59%, 30%, and 12% at week 3, 6,10, and 12, respectively. The side effects reported were all mild and transient. We conclude that tap water iontophoresis is a safe and useful treatment modality for palmar hyperhidrosis.
Cellulose-based superhydrophobic surfaces and Dynamics of coupled chemical systems (2015)

Superhydrophobic surfaces can be found in plants, insects, and bird feathers1. Inspired by natural superhydrophobic surfaces, researchers have recently developed and constructed superhydrophobic surfaces in a variety of smart and simple ways. The hydrophilic property of cellulose nanocrystals (CNCs) was modified by the esterification of CNCs with low surface energy chemicals of 2H,2H,3H,3H-Perfluorononanoyl chloride and 2H,2H,3H,3H-Perfluoroundecanoyl chloride, respectively. A stable suspension of nanospherical fluorinated cellulose ester was obtained by using the nanoprecipitation technique. The resulting nanostructured fluorinated cellulose esters was simply coated on a paper surface to gain a superhydrophobic paper surface characterized by a contact angle over 150º. The superhydrophobic paper remained stable even at a high temperature, showing no signs of melting or damage. The hydrophobized paper was characterized by nuclear magnetic resonance (NMR), infrared spectroscopy (IR), and static contact angle (CA) measurement. Further, we investigated the size, shape, and amorphicity of nanostructured fluorinated cellulose esters by light scattering (DLS), scanning electron microscopy (SEM), and X-ray diffraction (XRD) measurements. The development of economically and ecologically viable strategies for the superhydrophobization of surfaces for the introduction of a self-cleaning property offers a vast variety of interesting applications. Examples include packaging materials, textiles, outdoor clothing, and microfluidic devices.\n\nThe dynamics of oscillation in chemical reactions as a research field has grown dramatically over the past 50 years and produced thousands of studies on about 70 known chemical oscillators. Oscillating chemical reactions find many applications in physics, biology, physiology, geology, and medicine. The dynamics of the bromate-sulfite-ferrocyanide (BSF) reaction is studied in a well-mixed open chemical reactor, called a continuous stirred tank reactor (CSTR). A CSTR system can be used to investigate the dynamics of outof-equilibrium chemical processes, such as oscillation, bistability, and chaos. This BSF reaction exhibits periodic oscillation as a function of [H+], called pH oscillation. The reaction was carried out at 25 ºC, and the flow rate was 1 and 2 mL/min. The pH oscillation occurs only in a specific range of flow rates. Here, we show regular pH oscillation in a BSF system by utilizing different concentrations under a nitrogen atmosphere. Such a pH oscillator system can be coupled or probed with pH-sensitive systems, and it helps to understand new mechanisms may arise by periodic behavior.
Properties of the DNA-binding domain of the simian virus 40 large T antigen. (1989)

T antigen (Tag) from simian virus 40 binds specifically to two distinct sites in the viral origin of replication and to single-stranded DNA. Analysis of the protein domain responsible for these activities revealed the following. (i) The C-terminal boundary of the origin-specific and single-strand-specific DNA-binding domain is at or near amino acid 246; furthermore, the maximum of these DNA-binding activities coincides with a narrow C-terminal boundary, spanning 4 amino acids (246 to 249) and declines sharply in proteins with C termini which differ by a few (4 to 10) amino acids; (ii) a polypeptide spanning residues 132 to 246 of Tag is an independent domain responsible for origin-specific DNA binding and presumably for single-stranded DNA binding; and (iii) a comparison of identical N-terminal fragments of Tag purified from mammalian and bacterial cells revealed differential specificity and levels of activity between the two sources of protein. A role for posttranslational modification (phosphorylation) in controlling the DNA-binding activity of Tag is discussed.
An AlN-based high temperature package for SiC devices: materials and processing (2005)

SiC-based electronics have the potential for reliable operations at higher junction temperatures, power densities, and frequencies than those can be achieved with Si devices. At present the development of SiC devices for use at temperatures up to 500/spl deg/C has been well underway for various applications. However, currently available packages are not capable of working at such high temperature. Therefore, it is needed to develop a high temperature package to fit the needs of SiC devices. In this paper, we present our development in AlN-based high temperature packaging technology for SiC devices with a focus on materials and processing of: (1) AlN substrate; and (2) carbon form heatsink.
Concentration quenching of electroluminescence in neat Ir(ppy)3 organic light-emitting diodes (2010)

We studied concentration quenching of electroluminescence (EL) in organic light-emitting diodes with a neat fac-tris(2-phenylpyridinato-N, C2′) iridium (III) [Ir(ppy)3] emitting layer of different thicknesses sandwiched between electron and hole blocking layers. The intensity of the green emission decreased rapidly with increasing Ir(ppy)3 thickness and was reversely correlated with the tail band emission. The overall light output power reached the minimum at 4 nm, and attained a saturated value for Ir(ppy)3 thicker than 6 nm. These results are interpreted as evidence that concentration quenching in Ir(ppy)3 originates from both short and long-range energy transfer between excited and ground states of molecules. The EL quenching magnitude was found to be independent of the injection current, indicating that biexcitonic annihilation plays a minor role.
Altered levels of the synaptosomal associated protein SNAP-25 in hippocampus of subjects with mood disorders and schizophrenia (2001)

SNAP-25 levels were measured in ventral hippocampus in subjects with unipolar depression (n = 12), bipolar disorder (n = 13), schizophrenia (n = 15) and controls (n = 15) using quantitative immunocytochemistry. SNAP-25 levels were reduced significantly in stratum oriens of bipolar patients compared with controls (p < 0.05); they were also reduced significantly in st. oriens (p < 0.01 vs schizophrenia), in alveous (p < 0.01 vs schizophrenia) and in presubiculum (p < 0.05 vs depressed). SNAP-25 levels were also reduced in several layers of schizophrenics, only significantly so in st. granulosum (p < 0.05 vs controls). In contrast, depressed SNAP-25 levels increased in st. moleculare (p < 0.01 vs schizophrenics) and presubiculum (p < 0.05 vs controls and bipolars; p < 0.01 vs schizophrenics). SNAP-25 values were not affected by age, sex, race, post-mortem interval, brain pH, side of brain, age of onset of disease, family history of psychiatric disease, drug or alcohol use, antipsychotic drug treatment, or mode of death. The reported changes in SNAP-25 levels appear to be disease specific, separating synaptic pathology in unipolar depression from that observed in schizophrenia and bipolar disorders.
Size Distribution of Colistin Delivery by Different Type Nebulizers and Concentrations During Mechanical Ventilation (2019)

Although aerosol delivery through mechanical ventilators has been used to administer various medications, little is known of administration with colistin. This in vitro evaluation aimed to evaluate size distribution of colistin delivery by different types of nebulizers and concentrations during mechanical ventilation. Colistin methanesulfonate (colistin) for injection was dissolved in 6 mL of distilled water to produce a low concentration (L; 156 mg) and a high concentration (H; 312 mg). A dose volume of 6 mL was placed in a vibrating mesh nebulizer (VMN) and a jet nebulizer (JN). The inhaled mass (mean ± SD) of the VMN-L (53.80 ± 14.79 mg) was greater than both the JN-L (19.82 ± 3.34 mg, <i>P</i> = 0.001) and JN-H (31.72 ± 4.48 mg, <i>P</i> = 0.017). The nebulization time of the VMN-L (42.35 ± 2.30 min) was two times longer than the JN-L (21.12 ± 0.8 min) or JN-H (21.65 ± 0.42 min; <i>P</i> < 0.001). The mass median aerodynamic distal to the endotracheal tube was within a similar range at 2.03 to 2.26 μm (<i>P</i> = 0.434), independent of neb or formulation concentration. In conclusion, the VMN-L yields greater inhaled mass than the JN with either concentration. Therefore, a standard nominal dose of colistin results in a higher delivered dose during mechanical ventilation with a VMN compared with a JN and may be considered the preferred device. If JN must be used, multiple doses of low concentration colistin may compensate for poor delivery performance.
Immobilization of Molecular Catalysts (2008)

Abstract The sections in this article are Introduction and Scope Metal Complex–Support Interaction Physically Immobilized (“Entrapped”) Metal Complexes Intrazeolite Assembly: Ship‐in‐a‐Bottle Catalysts Entrapment in Sol–Gel and Polysiloxane Matrices Microencapsulation and Polymer‐Incarcerated Methods Supramolecular Complexation: Mechanical Immobilization Tethered Metal Complexes Multifunctional Surfaces Spatial Restrictions Imparted by Periodic Mesoporous Silica Site Isolation via Spatial Patterning of the Silica Surface Grafted Metal Complexes: Surface Organometallic Chemistry ( SOMC ) Alkyl‐Based SOMC Alkoxide‐Based SOMC Amide‐Based SOMC Molecular Model Oxo–Surfaces Metal–Organic Assemblies: Self‐Immobilized Homogeneous Catalysts Metal–Organic Frameworks A Achiral Metal–Organic Assemblies B Chiral Metal–Organic Assemblies Matrix‐Embedded Catalysts A Sol–Gel‐Processed Interphase Catalysts B Organic–Polymer‐Embedded Catalysts C Self‐Immobilizing Polymerization Catalysts D Molecularly Imprinted Polymers Liquid Crystal Assemblies
Temporal and spatial vegetation cover changes in Israeli transition zone: AVHRR-based assessment of rainfall impact (2000)

The ability of NOAA/AVHRR data to monitor vegetation response to rainfall in three different vegetation zones was assessed along a north-south transect in Israel. The NDVI database was developed from atmospherically- and radiometrically-corrected NDVI composites from observations spanning three years. Three vegetation zones, Mediterranean region, transition zone, and semiarid region, were geographically separated by means of NDVI values. Based on three years of AVHRR observations during a relatively dry year and two years with near average rainfall, the phenological characteristics for all three vegetation zones were very similar and stable. The results showed that only a few AVHRR observations are necessary to monitor the seasonal and spatial variability of vegetation cover in different climatic zones located in Israel. The NDVI of the Israeli transition zone was found to be very sensitive to rainfall. The difference between maximum and minimum NDVI values in rainy season in the transition zone was at least two times higher than that in the Mediterranean and the semiarid regions. This phenomenon can be used as an indicator of any environmental changes in this region.
Study of cable crimping factors affecting contact resistance of medium voltage cable ferrule and lug (2013)

In this study, crimping factors that have possibilities to affect the contact resistance of medium voltage cable ferrule and lug had been determined and further verified in laboratory experiments. A good crimping is important in order to achieve a very good contact resistance for cable joint (Below 50micro-Ohms). Other than that, good contact resistance between cables joint can reduce the chance of having hotspots that are commonly caused by overheating in cable joint. It was found in most situations that the measurement of contact resistance at site is not possible due to insufficient access to make a measurement. Most of cable failure cases were caused by failure of cable joints. Hence, a better crimping or cable connection method is needed to ensure a good contact in every cable joint. There are few crimping factors that have been pondered in this study and the factors are; (1) Crimping pressure, (2) Number of crimp indents, (3) Location of crimp indents, and (4) Shape of crimp indents. Twenty eight different configuration of compression connectors and bolted connectors for 240 mm2 stranded aluminium cable conductors have been examined in order to identify and clarify the correlations between the designs characteristics, applied pressure, configurations, crimp numbers and other possible parameters to the quality of the connection of ferrule and lug. The quality is assessed with the basis in contact resistance measurement and tensile strength after sample preparation. The results showed that applied pressure does not necessarily contributed to increase of contact resistance, but configuration and crimp numbers does. These results also showed that deep indent crimp is better than hexagonal crimp for 240 mm2 stranded aluminium cable conductors and how different deep indent crimp in terms of quality compared to the increasingly popular mechanical connectors. (4 pages)
Highly efficient optical power transfer to whispering-gallery modes by use of a symmetrical dual-coupling configuration (2000)

We report that greater than 99.8% optical power transfer to whispering-gallery modes was achieved in fused-silica microspheres by use of a dual-tapered-fiber coupling method. The intrinsic cavity loss and the taper-to-sphere coupling coefficient are inferred from the experimental data. It is shown that the low intrinsic cavity loss and the symmetrical dual-coupling structure are crucial for obtaining the high coupling efficiency.
Low excess flux noise in YBa/sub 2/Cu/sub 3/O/sub 7-x/ dc SQUIDs cooled in static magnetic fields (1997)

We have investigated the effect of device geometry on the excess low frequency 1/f noise of thin-film YBCO dc SQUIDs cooled in static magnetic fields. The key factor in eliminating this noise is the reduction of the linewidth of the SQUID loop to a value below the average separation of the flux vortices. The spectral density of the flux noise in these devices was independent of cooling field up to 33 /spl mu/T in the best case. Estimates indicate that incorporating this device into a directly-coupled magnetometer would not increase the noise further.
Isolation of Mutants of Streptomyces griseus That Sporulate in Nutrient Rich Media: Cloning of DNA Fragments That Suppress the Mutations. (1995)

Streptomyces griseus does not sporulate when grown in a nutrient rich medium. Two mutants that sporulate in such media were isolated and characterized. The mutants sporulate at the same time as the wildtype when grown in a nutrient poor medium. The mutants and wildtype exhibit the same commitment to sporulation following a nutritional shiftdown. Six genomic DNA fragments of wildtype cells when transformed into the mutants caused these mutants to acquire the wildtype phenotype of not sporulating in rich growth media. Restriction analyses show that the six cloned DNA fragments are different. The six clones suppressed sporulation when transformed into Streptomyces coelicolor and Streptomyces lividans and secondary metabolite production was suppressed in S. coelicolor.