gebhart/patrepeval huggingface dataset:
Complex resonant converter with a power factor improvement by voltage feedback (2003)

Abstract As a highly efficient, high‐power‐factor power supply system, the authors have proposed a voltage feedback power factor improved circuit that achieves a power factor improvement by using the primary switching voltage in a complex resonant converter in which voltage resonance is also provided on the secondary side in a primary voltage resonant converter. This technique, however, presented considerable difficulties in circuit design for achieving superior performance characteristics, due to the fact that the incorporation of multiple resonant systems resulted in complex operations, and performance was significantly influenced by the constants of the system components. In this paper, through simulation studies and experiments, we identify the impact on performance of the components of the power‐factor improvement circuit. By demonstrating performance changes due to four circuit parameters and the impact of the parameters on the switching operations, we have identified the conditions under which high efficiency can be maintained while achieving an improvement in the power factor. The effectiveness of the converter is also demonstrated by means of experiments. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 86(11): 93–101, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecja.1181
The Monotonic Lagrangian Grid for Fast Air-Traffic Evaluation (2010)

This paper describes the continued development of a dynamic air-traffic model, ATMLG, intended for rapid evaluation of rules and methods to control and optimize transport systems. The underlying data structure is based on the Monotonic Lagrangian Grid (MLG), which is used for sorting and ordering positions and other data needed to describe N moving bodies, and their interactions. In ATMLG, the MLG is combined with algorithms for collision avoidance and updating aircraft trajectories. Aircraft that are close to each other in physical space are always near neighbors in the MLG data arrays, resulting in a fast nearest-neighbor interaction algorithm that scales as N. In this paper, we use ATMLG to examine how the ability to maintain a required separation between aircraft decreases as the number of aircraft in the volume increases. This requires keeping track of the primary and subsequent collision avoidance maneuvers necessary to maintain a five mile separation distance between all aircraft. Simulation results show that the number of collision avoidance moves increases exponentially with the number of aircraft in the volume.
<i>Enterococcus faecalis</i> Adhesin, Ace, Mediates Attachment to Extracellular Matrix Proteins Collagen Type IV and Laminin as well as Collagen Type I (2000)

Adhesin-mediated binding to extracellular matrix (ECM) proteins is thought to be a crucial step in the pathogenic process of many bacterial infections. We have previously reported conditional adherence of most Enterococcus faecalis isolates, after growth at 46 degrees C, to ECM proteins collagen types I and IV and laminin; identified an E. faecalis-specific gene, ace, whose encoded protein has characteristics of a bacterial adhesin; and implicated Ace in binding to collagen type I. In this study, we constructed an ace disruption mutant from E. faecalis strain OG1RF that showed marked reduction in adherence to collagen types I and IV and laminin when compared to the parental OG1RF strain after growth at 46 degrees C. Polyclonal immune serum raised against the OG1RF-derived recombinant Ace A domain reacted with a single approximately 105-kDa band of mutanolysin extracts from OG1RF grown at 46 degrees C, while no band was detected in extracts from OG1RF grown at 37 degrees C, nor from the OG1RF ace mutant grown at 37 or 46 degrees C. IgGs purified from the anti-Ace A immune serum inhibited adherence of 46 degrees C-grown E. faecalis OG1RF to immobilized collagen type IV and laminin as well as collagen type I, at a concentration as low as 1 microg/ml, and also inhibited the 46 degrees C-evoked adherence of two clinical isolates tested. We also showed in vitro interaction of collagen type IV with Ace from OG1RF mutanolysin extracts on a far-Western blot. Binding of recombinant Ace A to immobilized collagen types I and IV and laminin was demonstrated in an enzyme-linked immunosorbent assay and was shown to be concentration dependent. These results indicate that Ace A mediates the conditional binding of E. faecalis OG1RF to collagen type IV and laminin in addition to collagen type I.
A Technique to Reduce Error Propagation in M-ary eedback Equalization (1995)

A technique is described for reducing the error prop- agation resulting from the use of decision feedback equalization in an M-ary, varying system. The technique is applicable when the actual system response varies moderately about a nominal response that can be approximated by a partial response. The decision feedback equalizer (DFE) is supplemented with partial response precoding and detection such that the resulting error propagation is a function of only the difference between the actual system response and the partial response. Simulation results for a system with a nominal response equal to the duobinary partial response are given to illustrate the performance improvement. I. INTRODUCTION REQUIREMENT often faced in digital communications system design is spectrally efficient transmission over noisy intersymbol interference (ISI) channels. A method of reducing the degrading effects of the channel that has found many practical applications is decision feedback equalization. A DFE is shown in Fig. 1. The feedforward filter (FFF) acts primarily as a phase equalizer which suppresses the precursive ISI, while the feedback filter (FBF) uses decisions on the transmitted data in an attempt to remove the postcursive ISI.
High Strength and Fracture Toughness Balances in Extruded Mg-Zn-RE Alloys by Dispersion of Quasicrystalline Phase Particles (2008)

Six kinds of Mg-2.5 at%Zn-0.5 at%RE (RE: rare earth element, Y, Gd, Tb, Dy, Ho and Er) alloys with grain size of 1∼2 μm and containing a quasicrystalline icosahedral phase were prepared by casting and extrusion. These alloys had high strength and high fracture toughness balances, due to the synergetic effect of grain refinement and the dispersion of quasicrystalline phase particles. Microstructural observations showed a ductile fracture pattern, and that the origin of void nucleation was not the quasicrystalline phase particles but the conventional precipitates and the W-phase particles, because of the difference in the interface structure between the matrix and the particles.
ChemInform Abstract: A Novel Synthesis of cis‐1‐((6‐Chloro‐3‐((2‐chloro‐3‐thienyl)methoxy)‐2,3‐dihydrobenzo(b)thien‐2‐yl)methyl)‐1H‐imidazole: A New Class of Azole Antifungal Agents. (1988)

Abstract The thiiranium cation, initially formed from the thiopyran (II), undergoes ring contraction in the presence of imidazole (III) to give the cis compound (IV) as major product (X‐ray analysis of the solvent‐free alcohol: space group P2 1 /c; Z=4).
Endothelial Progenitor Cells (2004)

Differentiation of organs depends on signals derived from developing vasculature. Embryonic endothelial progenitor cells (EPCs), angioblasts, arise from migrating mesodermal cells and have a precursor in common with hematopoietic stem cells (hemangioblasts, HSCs). These cells appear together during formation of blood islands and the yolk sac capillary network with the EPCs located peripherally to the HSCs. EPCs respond to fibroblast growth factor-2, and vascular endothelial growth factor (VEGF). Activation of vasculoneogenesis in the adult in response to hyperplasia, injury, or tumor growth involves both endothelial cells in situ and circulating EPCs from the bone marrow. Bone marrow—derived EPCs may be mobilized by growth factors such as granulocyte macrophage colony-stimulating factor and VEGF. The therapeutic use of EPCs became feasible when it was shown that statins activate EPCs and enhance angiogenesis in vivo. In addition, mobilized EPCs may be expanded in vitro and used for transplantation enhancement of angiogenesis. Gene therapy to enhance circulation in premature atherosclerosis (Buerger disease) may be accomplished using phVEGF. Decreased neoangiogenesis in older animals may be corrected by transplantation of bone marrow from young animals. However, there is a major hurdle to overcome in obtaining enough EPCs for human use. There is preliminary evidence that this may be overcome by genetic modification of EPCs to overexpress angiogenic growth factors.
Group-Complementary Array Coding for Radar Clutter Rejection (1983)

A radar waveform design technique which utilizes Lagrange's method of multipliers to control temporal sidelobes and to reduce Doppler sidelobes is described. This classical method of constrained optimization is applied to the problem of synthesizing a radar wave-form where mismatch loss is the objective function to be minimized. The associated constraints are taken from expressions for the composite temporal sidelobes of the cross-correlation response and the peak correlation response where sets of code words are used to modulate a series of radar pulses. The resulting code sets and receiver reference sets are called group-complementary and produce a trench parallel to or on the range axis of the cross-ambiguity surface.
FSI-inspired solvent and “full fluorosulfonyl” electrolyte for 4 V class lithium-metal batteries (2019)

A new “full fluorosulfonyl” (FFS) electrolyte is developed for highly reversible 4 V class lithium-metal batteries (LMBs).
Tissue-engineered bone formation <i>in vivo</i> using a novel sintered polymeric microsphere matrix (2004)

We have evaluated in vivo a novel, polymer-based, matrix for tissue engineering of bone. A segmental defect of 15 mm was created in the ulna of New Zealand white rabbits to determine the regenerative properties of a porous polylactide-co-glycolide matrix alone and in combination with autogenous marrow and/or the osteoinductive protein, BMP-7. In this study four implant groups were used: 1) matrix alone; 2) matrix with autogenous marrow; 3) matrix with 20 microg of BMP-7; and 4) matrix with 20 microg of BMP-7 and autogenous marrow. The results showed that the degree of bone formation was dependent on the properties of the graft material. The osteoconductive sintered matrix structure showed significant formation of bone at the implant-bone interface. The addition of autogenous marrow increased the penetration of new bone further into the central area of the matrix and also increased the degree of revascularisation. The osteoinductive growth factor BMP-7 induced penetration of new bone throughout the entire structure of the implant. The most effective treatment was with the combination of marrow cells and osteoinductive BMP-7.
A Variation on CSMA/CD That Yields Movable TDM Slots in Integrated Voice/Data Local Networks (1982)

A variation on the carrier-sense, multiple-access/collision-detection (CSMA/CD) protocol for local-area, random-access broadcast networks is presented. The new protocol supports any mix of voice and data traffic, and has an upper bound on the delay of periodic traffic. In conventional CSMA/CD systems, statistical fluctuations in the transmission delay may cause disruptions in reconstructed voice waveforms. This does not occur with the new protocol. With this protocol, data sources use conventional CSMA/CD techniques to access the channel, while voice sources use a subset of these protocols, and appear to acquire a time-division multiplexed (TDM) slot. As in TDM systems, the entire system capacity can be used by the periodic sources. Unlike TDM systems, periodic slots are repositioned when other transmissions interfere with them, timing discrepancies between sources can be tolerated, and a centralized controller is not required to assign slots. Simulations are used to compare the delays in this system with those in conventional CSMA/CD systems. It is shown that at link utilizations of 0.9, voice sources can operate in a time-assignment, speech-interpolation mode. The effect of periodic traffic on conventional CSMA/CD protocols is also determined.
Simultaneous saccharification and fermentation process of different cellulosic substrates using a recombinant Saccharomyces cerevisiae harbouring the β-glucosidase gene (2010)

In Brazil, the production of ethanol from sugarcane produces large amounts of lignocellulosic residues (bagasse and straw), which have been driving research and development for the production of second generation ethanol. In the present work, a recombinant Saccharomyces cerevisiae strain expressing the β-glucosidase gene from Humicola grisea was used for ethanol production from three different cellulosic sources by simultaneous saccharification and fermentation. Initially, a enzymatic pre-hydrolysis step was done with a solid:liquid ratio of 1:4, and an enzymatic load of 25 filter paper activity (FPU).g -1 of cellulosic substrate. Using sugarcane bagasse pretreated cellulignin, crystalline cellulose and carboxymethyl cellulose, 51.7 g L -1 , 41.7 g L -1 and 13.8 g L -1 of ethanol was obtained, respectively, at the end of 55 hrs of fermentation. The highest ethanol productivity (0.94 g L -1 hrs -1 ) was achieved using sugarcane bagasse pretreated cellulignin. The use of a recombinant S. cerevisiae led to extremely low glucose concentrations when compared to other works reported in literature.
NMR Characterization of the Water Adsorbed by Montmorillonite: Impact on the Analysis of Porosity Logs (2000)

Abstract Reservoir rocks contain interstitial pore water as well as the water adsorbed by the clay minerals. It was suggested by Chitale, et. al. (2000) based upon NMR characterization of montmorillonite that the threshold quantity of adsorbed water in this clay is 500 mg per g of dry clay, which agrees closely with the values reported in the clay science literature. This paper provides a summary of those aspects of hydration of montmorillonite that have direct bearing on log analysis and it highlights the impact of the optimization of amount of water adsorbed by montmorillonite on the interpretation of NMR-as well as conventional density and neutron porosity logs. A new petrophysical parameter "wetness" is defined for montmorillonite as being the ratio of "volume of adsorbed water / volume of wet clay". A generic term "wetness-clay" applies to any clay. It computes to 0.57 for water-saturated montmorillonite. The wet clay density for montmorillonite available from the standard log interpretation charts (Halliburton, 1991 and Schlumberger, 1994) ranges between 2 to 2.7 g/cc. This paper refines the bulk wet clay density to 1.7g/cc for montmorillonite with a dry clay density range of 2.6-2.7 g/cc. It translates to an apparent wet clay density-porosity of 58%, which is a measure of the water adsorbed on montmorillonite surface. The refined value for thermal neutron porosity that measures both water and the hydroxyls in the clay is proposed to be 70%. Rationalization of the wet clay-end-member values for the density, neutron logs based on the adsorbed water in montmorillonite should enhance the quality and accuracy of the overall log interpretation.
Development of a body fluid identification multiplex via DNA methylation analysis (2019)

The goal of this study is to develop an epigenetic multiplex for body fluid identification based on tissue specific DNA methylation. A series of genetic loci capable of discerning the origin of DNA as coming from saliva, blood, vaginal epithelia, or semen were used for this application. The markers - BCAS4, CG06379435, VE_8, and ZC3H12D - were amplified together and then sequenced via pyrosequencing. Methylation values for cytosine guanine dinucleotide (CpG) sites at each locus were then measured across the four markers. In total, 124 samples were collected, and bisulfite modified to convert unmethylated DNA to uracil. This converted DNA was then amplified via multiplex PCR with reverse primers containing a biotin molecule. Biotinylated PCR products were then analyzed using pyrosequencing to generate a series of pyrograms containing 18 CpG sites. The percent methylation at each CpG site was determined, and then agglomerative hierarchical cluster analysis was used to create a model to indicate sample origin. Further analysis reduced the number of CpG sites required for optimal determination of body fluid type to five. This study demonstrates an efficient multiplexed body fluid identification process utilizing DNA methylation that can be easily implemented in forensic laboratories.
A Mechanomodulatory Device to Minimize Incisional Scar Formation (2013)

Mechanomodulatory strategies to control the incisional wound environment can significantly reduce pathologic scarring and fibrosis after surgery.
The maximum factor queue length batching scheme for video-on-demand systems (2001)

In a video-on-demand environment, batching of video requests is often used to reduce I/O demand and improve throughput. Since viewers may defect if they experience long waits, a good video scheduling policy needs to consider not only the batch size but also the viewer defection probabilities and wait times. Two conventional scheduling policies for batching are the first-come-first-served (FCFS) policy, which schedules the video with the longest waiting request, and the maximum queue length-(MQL) policy, which selects the video with the maximum number of waiting requests. Neither of these policies leads to entirely satisfactory results. MQL tends to be too aggressive in scheduling popular videos by considering only the queue length to maximize batch size, while FCFS has the opposite effect by completely ignoring the queue length and focusing on arrival time to reduce defection. In this paper, we introduce the notion of factored queue length and propose a batching policy that schedules the video with the maximum factored queue length. We refer to this as the MFQL policy. The factored queue length is obtained by weighting each video queue length with a factor which is biased against the more popular videos. An optimization problem is formulated to solve for the best weighting factors for the various videos. We also consider MFQL implementation issues. A simulation is developed to compare the proposed MFQL variants with FCFS and MQL. Our study shows that MFQL yields excellent empirical results in terms of standard performance measures such as average latency time, defection rates, and fairness.
Synthesis of Ultrafine and Spherical Barium Titanate Powders Using a Titania Nano‐Sol (2006)

A novel synthetic method for the preparation of spherical, homogeneous, and ultrafine barium titanate (BaTiO 3 ) powders is described. An aqueous titania nano‐sol was prepared by peptizing coarse aggregate of hydrous titania with nitric acid. BaTiO 3 powders could be synthesized through a simple reflux method using the titania nano‐sol and barium hydroxide. As decreasing the titanium concentration, the particle size of the resulting spherical BaTiO 3 powder was increased from 40 to 130 nm and the porosity also increased. It was revealed that the smaller as‐prepared BaTiO 3 powder was less porous and became more tetragonal with less intragranular pores after annealing. With this method, a highly tetragonal BaTiO 3 powder ( c / a ∼1.008) with a particle size of 120.0 nm was successfully prepared and would be very suitable for the thinner dielectrics in higher capacitance multilayer ceramic capacitors.
Anion Binding by Fluorescent Biimidazole Diamides (2002)

Six 2,2'-biimidazoles with various amide groups at the 4- and 4'-positions were prepared from 5-propyl-1H-imidazole-4-carboxylic acid ethyl ester. In the final step of the synthesis, biimidazole C2-C2' bond formation was accomplished in 33-45% yield by palladium(0)-catalyzed homocoupling of the corresponding 2-iodoimidazoles. Four of the biimidazoles were studied by X-ray diffraction. In the solid state, all display coplanar imidazole rings, an anti relationship of amide groups, and intramolecular (NH(amide).N(imid)) and intermolecular (NH(imid).O(amide)) hydrogen bonding. In CH(2)Cl(2), the emission intensity of the biimidazoles is quenched by the presence of dihydrogenphosphate and chloride anions, but no shifts in lambda(emiss) are observed. Binding constants for 1:1 biimidazole-anion complexation (K(assoc)) are on the order of 10(4) M(-)(1) for H(2)PO(4)(-) and Cl(-). One of the receptors (bearing 3,5-difluorobenzylamides) is selective for chloride. The participation of the amide NH atoms in anion binding was established by (1)H NMR.
User Profiling in the Time of HTTPS (2016)

Tracking users within and across websites is the base for profiling their interests, demographic types, and other information that can be monetised through targeted advertising and big data analytics. The advent of HTTPS was supposed to make profiling harder for anyone beyond the communicating end-points. In this paper we examine to what extent the above is true. We first show that by knowing the domain that a user visits, either through the Server Name Indication of the TLS protocol or through DNS, an eavesdropper can already derive basic profiling information, especially for domains whose content is homogeneous. For domains carrying a variety of categories that depend on the particular page that a user visits, i.e., news portals, e-commerce sites, etc., the basic profiling technique fails. Still, accurate profiling remains possible through traffic fingerprinting that uses network traffic signatures to infer the exact page that a user is browsing, even under HTTPS. We demonstrate that transport-layer fingerprinting remains robust and scalable despite hurdles such as caching, dynamic content for different device types etc. Overall our results indicate that although HTTPS makes profiling more difficult, it does not eradicate it by any means.
Activity of 6-methyl-8-substituted ergolines against the 7,12-dimethylbenz(a)anthracene-induced mammary carcinoma. (1975)

The ability of a series of 8-beta-carboxamido ergolines, 8-formamido ergolines, and 8-methyl ergolines to cause regressions of established dimethylbenz[a]anthracene-induced mammary carcinomas was compared to some ergot alkaloids. Although most of the ergoline derivatives depressed serum prolactin concentrations in rats, only a few had pronounced effects against the dimethylbenz[a]anthracene-induced mammary carcinoma in rats. Some derivatives from each of the three groups of substituted ergolines gave comparable activities against the dimethylbenz[a]anthracene-induced mammary carcinoma.
Broadband packet wireless access appropriate for high-speed and high-capacity throughput (2002)

This paper evaluates the optimum broadband packet wireless access scheme using a 50-100 MHz bandwidth to achieve highspeed packet transmission taking into consideration the realization of high-speed and high-capacity packet transmission, the accommodation of variable rate services with different quality requirements, and the extendibility for and commonality to the IMT-2000. In the forward link, the presented simulation results associated with the evaluation of key features show that multi-carrier CDMA (MC-CDMA) is the most promising candidate, since it achieves the highest-capacity packet transmission in a severe multipath fading channel due to a lower symbol-rate with numerous sub-carriers and a channel coding gain accompanied by the frequency diversity effect. Meanwhile, single-carrier/DS-CDMA and multi-carrier/DS-CDMA (SC/DS-CDMA and MC/DS-CDMA) are severely degraded due to significantly increasing multipath interference, and orthogonal frequency division multiplexing (OFDM) lacks efficient cell deployment due to the necessity of frequency reuse in a multi-cell environment without complicated dynamic channel assignment (DCA). Furthermore, in the reverse link, we conclude that MC(SC)/DS-CDMA is a promising candidate because it has advantages such as an effective random access method, soft handover, and an inherent property for accurate location detection.