gebhart/patrepeval huggingface dataset:
Blind deconvolution of reverberated speech signals via regularization (2002)

This paper explores blind deconvolution of reverberated speech signals in microphone array applications. Two regularization approaches are proposed based on available a priori knowledge. The regularized least-squares (LS) approach uses the speech signal characteristics and the lowpass nature of the reverberation channel; and the regularized cross correlation (CR) approach requires more precise knowledge of reverberation which can be obtained through training. The two methods are robust to the presence of noise.
TOPPSS: Cost-minimal Password-Protected Secret Sharing based on Threshold OPRF. (2017)

We present TOPPSS, the most efficient Password-Protected Secret Sharing (PPSS) scheme to date. A (t, n)-threshold PPSS, introduced by Bagherzandi et al. [4], allows a user to share a secret among n servers so that the secret can later be reconstructed by the user from any subset of \(t+1\) servers with the sole knowledge of a password. It is guaranteed that any coalition of up to t corrupt servers learns nothing about the secret (or the password). In addition to providing strong protection to secrets stored online, PPSS schemes give rise to efficient Threshold PAKE (T-PAKE) protocols that armor single-server password authentication against the inherent vulnerability to offline dictionary attacks in case of server compromise.
<title>Diagnostic technique for electrical power equipment using fluorescent fiber</title> (1991)

We studied a fiberoptic electrical sensor to detect electrical discharge light in a gas insulated system using a plastic optical fiber doped with an organic fluorescent compound which can absorb and emit light. We measured the spectrum of SFs gas by spectroscope using needle electrodes in a sealed glass tube. The spectrum is bluish and dis continuous and in the range of about 330 nm to 600 nm. The wavelength corresponding to the maximum emitted optical strength is 429 nm. The spectrum does not change when the electrode gap and the gas pressure are varied. Fiber doped with fluorescence which is the most useful for sensing the discharge light in SFs gas has been developed. The conversion efficiency was determined using monochromatic light produced by a xenon lamp with color filters. The conversion efficiency of the improved fiber doped with BBOT is on the order of 0. 01 for incident light of 406 nm.
Studies on the biological activity of some nitrothiophenes (2005)

The biological activity of nineteen substituted thiophenes (3) have been assessed by evaluating the minimum inhibitory concentration required to inhibit the growth of E. coli, M. luteus and A. niger. The series displays a wide range of activities with 2-chloro-3,5-dinitrothiophene (3a) or 2-bromo-3,5-dinitrothiophene (3c) showing the highest activity against all three organisms, while the simplest compound of the series, 2-nitrothiophene (3s) shows the smallest activity in each case. The mode of action of 3a and 3c is thought to involve nucleophilic attack by intracellular thiols at the 2-position of the heterocyclic ring leading to displacement of halogen, but other active derivatives, such as 2,4-dinitrothiophene (3h) and 5-nitrothiophene-2-carbaldehyde (3d) which have no displaceable halogen or leaving group are thought to act by forming Meisenheimer complexes.
Self-Consistent Simulation of Space Charge Effects in Gas-Filled Radiofrequency Guides of Mass Spectrometer Interfaces (2022)

A method is presented for the self-consistent calculation of space charge effects in a stationary ion beam in long transporting radiofrequency channels. A dependence of ion current on the spatial and velocity distributions of ions in a narrow gas-filled radiofrequency guide is studied. Operation regimes are compared in the absence and presence of a weak guiding axial electrostatic field.
Microalbuminuria as a possible marker of risk of Balkan endemic nephropathy (2008)

Microalbuminuria may be a useful marker of early tubular injury in individuals at risk of developing BEN.
Capacity Contributing Conductive Cathode Additive for Sulfur Batteries (2016)

The Lithium-Sulfur (Li-S) battery has been a subject of intensive research in recent years due to its potential to provide much higher energy density and lower cost than the current state-of-the-art lithium-ion battery technology. However, both cell reaction active materials, sulfur and Li 2 S, are electronically non-conductive, which leads to the low electrode utilization and fast capacity fade during cell cycling. Large amounts of non-active carbon host materials must be added to boost sulfur electrode electronic conductivity for high rate discharge, which lowers the sulfur electrode specific energy density. Transition metal sulfides have been utilized as cathode material with high energy density and have been demonstrated to be rechargeable in lithium batteries. Many of these sulfides are electronic conductive with conductivity comparable to that of graphite and carbon black. Since they are also electrochemically active and can be cycled within the voltage window of sulfur battery, transition metal sulfides could be used as capacity contributing conductive cathode additive for sulfur batteries. We have investigated Titanium Disulfide (TiS 2 ), Pyrite (FeS 2 ) and Cupric Sulfide (CuS) as capacity-contributing conductive cathode additives to the sulfur electrodes in Li-S battery. Sulfur electrodes containing the metal sulfide additives showed improved power capability under high rate discharge. While the cyclability of the hybrid electrodes vary widely depending on the type of conductive additive, different and unique electrochemical behaviors were observed for hybrid electrodes with TiS 2 , FeS 2 and CuS respectively. Improved coin cell cycling performance was observed with TiS 2 as the cathode additive at 1C discharge rate. The TiS 2 distribution within the hybrid electrode showed significant impact on cell cycling capacity fade. The mechanisms associated with the electrochemical performance of each chemical system are discussed.
Dynamic upstream bandwidth allocation over ethernet PONs (2005)

Ethernet passive optical networks (EPONs) are a low-cost:, high-speed solution to the bottleneck problem of the broadband access network. A critical issue of EPONs is the utility of a shared upstream channel among the local users, and thus, an efficient bandwidth allocation mechanism is required in order to facilitate statistical multiplexing among the local network traffics. This paper proposes a dynamic bandwidth allocation scheme, i.e., limited sharing with traffic prediction (LSTP), for the upstream channel sharing. Based on the multipoint control protocol (MPCP) and the bursty traffic prediction, LSTP yields significant performance improvement as compared to other existing proposals.
Prognostic implications of severe coronary calcification in patients undergoing coronary artery bypass surgery: An analysis of the SYNTAX Study (2014)

Severe lesion calcification is associated with an increased mortality in patients undergoing CABG, but it is not an independent predictor of death-MI or MACE. This paradox can be attributed to the fact that CABG allows perfusion of the healthy coronaries bypassing the diseased arteries and thus it minimizes the risk of coronary events due to progressive atherosclerosis.
Solid-phase chemistry of functionalized three- and five-membered ring heterocycles (2001)

Contains fulltext : 146796.pdf (Publisher’s version ) (Open Access)
Measuring ectomycorrhizal fungal dispersal: macroecological patterns driven by microscopic propagules (2012)

Dispersal plays a prominent role in most conceptual models of community assembly. However, direct measurement of dispersal across a whole community is difficult at ecologically relevant spatial scales. For cryptic organisms, such as fungi and bacteria, the scale and importance of dispersal limitation has become a major point of debate. We use an experimental island biogeographic approach to measure the effects of dispersal limitation on the ecological dynamics of an important group of plant symbionts, ectomycorrhizal fungi. We manipulated the isolation of uncolonized host seedlings across a natural landscape and used a range of molecular techniques to measure the dispersal rates of ectomycorrhizal propagules and host colonization. Some species were prolific dispersers, producing annual spore loads on the order of trillions of spores per km(2). However, fungal propagules reaching host seedlings decreased rapidly with increasing distance from potential spore sources, causing a concomitant reduction in ectomycorrhizal species richness, host colonization and host biomass. There were also strong differences in dispersal ability across species, which correlated well with the predictable composition of ectomycorrhizal communities associated with establishing pine forest. The use of molecular tools to measure whole community dispersal provides a direct confirmation for a key mechanism underlying island biogeography theory and has the potential to make microbial systems a model for understanding the role of dispersal in ecological theory.
Density Functional Calculations of Magnesium-Amide : A cluster approach (2008)

If a future hydrogen society is to be established, a highly efficient solid-state hydrogen storage material must be found. The metal-N-H system, which is one of the new promising candidates, has been given considerable attention after Chen et al.[1] in 2002 found that lithium-nitride reversibly absorbs a large amount of hydrogen and form a mixture of lithium-hydride and lithium-amide. This thesis presents density functional theory calculations performed on Mg(NH2)2 (magnesium-amide).\n\nMg(NH2)2 is confirmed having a tetragonal unit cell which belongs to the space group I41/acd. The cations in Mg(NH2)2 (i.e. Mg2+) are tetrahedrally coordinated by the anions (i.e. NH2-) and the MgN4 tetrahedra share all four corners with other MgN4 tetrahedra, thus forming an open, three dimensional network. Furthermore, the crystal structure was found to be organized in weakly connected branches, where the branches point in the [1_10] or the [_110] directions, and where each branch is separated from the other branches by planes in the (112) and (11_2) orientations. \n\nDensity of states calculations showed that Mg(NH2)2 is an insulator with a GGA band gap of approximately 3.1 eV. The bonds within the anions (N-H) are primarily covalent, while ionic Mg-N bonds hold Mg(NH2)2 together.\n\nSix different surfaces and their corresponding surface energies have been calculated. The (110) surface proved to have the lowest surface energy, closely followed by the (012) and (112) surfaces. However, special symmetry properties and small structural changes during ionic relaxation of the (112) slab, indicates that the corresponding surface may be even more frequently found in a real crystal, despite the slightly higher surface energy compared to the (110) surface.\n\nThe first reported cluster calculations on complex hydrides in a plane wave code are to our knowledge included in the thesis. A combination of bulk, slab and cluster calculations provided new and important insights about Mg(NH2)2. Comparison of the density of states calculated from bulk, slab and cluster showed that occupied states in the band gap probably are one of the main reasons for why complex hydrides with nano-particle structure have better kinetics than complex hydrides with larger particles (in addition to the increased surface area).\n\nCalculations of the activation energy involved in the removal of NH3 and H2 showed that it is energetically easier to remove NH3 than H2 from Mg(NH2)2, confirming a general trend for metal-N-H systems.
A Variable Light Domain Fluorogen Activating Protein Homodimerizes To Activate Dimethylindole Red (2012)

Novel fluorescent tools such as green fluorescent protein analogues and fluorogen activating proteins (FAPs) are useful in biological imaging for tracking protein dynamics in real time with a low fluorescence background. FAPs are single-chain variable fragments (scFvs) selected from a yeast surface display library that produce fluorescence upon binding a specific dye or fluorogen that is normally not fluorescent when present in solution. FAPs generally consist of human immunoglobulin variable heavy (V(H)) and variable light (V(L)) domains covalently attached via a glycine- and serine-rich linker. Previously, we determined that the yeast surface clone, V(H)-V(L) M8, could bind and activate the fluorogen dimethylindole red (DIR) but that the fluorogen activation properties were localized to the M8V(L) domain. We report here that both nuclear magnetic resonance and X-ray diffraction methods indicate the M8V(L) forms noncovalent, antiparallel homodimers that are the fluorogen activating species. The M8V(L) homodimers activate DIR by restriction of internal rotation of the bound dye. These structural results, together with directed evolution experiments with both V(H)-V(L) M8 and M8V(L), led us to rationally design tandem, covalent homodimers of M8V(L) domains joined by a flexible linker that have a high affinity for DIR and good quantum yields.
Lyme Disease Presenting as Urinary Retention (1990)

We report a case of Lyme disease that presented with urinary retention. The individual then experienced lower extremity paralysis. Paralysis and urinary retention resolved with intravenous ceftriaxone antibiotic. To our knowledge this is the first report of a urological manifestation as the initial clinical presentation of Lyme disease. Recognition of clinical symptoms and urological complications of Lyme disease also are discussed.
Who Is Prescribing Opioids Preoperatively? A Survey of New Patients Presenting to Tertiary Care Adult Reconstruction Clinics (2020)

Level III, retrospective cohort study.
CUL7 Is a Novel Antiapoptotic Oncogene (2007)

Using an expression cloning approach, we identify CUL7, a member of the cullin family, as a functional inhibitor of Myc-induced apoptosis. Deregulated expression of the Myc oncogene drives cellular proliferation yet also sensitizes cells to undergo p53-dependent and p53-independent apoptosis. Here, we report that CUL7 exerts its antiapoptotic function through p53. CUL7 binds directly to p53, and small interfering RNA-mediated knockdown of CUL7 results in the elevation of p53 protein levels. This antiapoptotic role of CUL7 enables this novel oncogene to cooperate with Myc to drive transformation. Deregulated ectopic expression of c-Myc and CUL7 promotes Rat1a cell growth in soft agar, and knockdown of CUL7 significantly blocks human neuroblastoma SHEP cell growth in an anchorage-independent manner. Furthermore, using public microarray data sets, we show that CUL7 mRNA is significantly overexpressed in non-small cell lung carcinoma and is associated with poor patient prognosis. We provide experimental evidence to show CUL7 is a new oncogene that cooperates with Myc in transformation by blocking Myc-induced apoptosis in a p53-dependent manner.
Plasmonic chip application to enhanced fluorescence immunosensing and promotion of photochemical reaction (2023)

Abstract Plasmonic chip is the substrate with a wavelength scale-periodic pattern covered with thin metal films in which the electric field enhanced by the grating-coupled surface plasmon resonance can be used for exciting fluorescence molecules and for promoting photochemical reaction. The enhanced fluorescence has been applied to the sensitive detection of target molecule in immunosensors. To improve the detection sensitivity, optimal structure of the plasmonic chip has been studied. In this paper, epidermal growth factor receptor, α -fetoprotein, and candida mannan detection and breast cancer cells and neurons observation are reported. Further, the nanoantenna effect formed by superposition of the propagating waves in the plasmonic pattern is also studied for single molecule detection. As for applying the enhanced electric field to the photochemical reaction, crystallization of lysozyme and diarylethene and preparing capture interface in immunosensor are also reported. Plasmonic chip application and its future development are introduced.
ChemInform Abstract: Combinatorial Biosynthesis of “Unnatural” Natural Products: The Polyketide Example (1995)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Sulfonic Acid Based Complex Framework Materials (CFM): Nanostructured Polysulfide Immobilization Systems for Rechargeable Lithium–Sulfur Battery (2019)

Lithium-sulfur (Li-S) secondary batteries with sulfur cathodes and theoretical energy density of ~2600 Wh/kg, are promising high energy-density system for next-generation electric-vehicles (EVs) potentially mitigating the gravimetric and volumetric energy density limitations of existing lithium-ion (Li-ion) batteries. Herein, a chemically synthesized sulfonic acid-based complex framework material (CFM) termed as (SCFM), was used as sulfur host (S-SCFM) to prevent polysulfide dissolution in Li-S batteries. The S-SCFM based CFM cathodes show an initial capacity of 1190 mAh/g and a capacity of 1044 mAh/g after 100 cycles. In addition, the S-SCFM based CFM cathodes exhibited good cycling stability with a minimal fade rate of ~0.0012% per cycle. XPS analysis of the cycled separators with the S-SCFM electrodes shows complete absence of polysulfide species after 100 charge-discharge cycles. It was also identified that the SCFM based CFM chemically binds sulfur via -C-S- linkages thereby exhibiting an affinity for the polysulfide species formed during the charge-discharge cycles. As a result, the SCFM based CFM prevent polysulfide species from dissolving and diffusing into the electrolyte. A thorough understanding of these engineered SCFM based CFM sulfur host in Li-S battery outlined herein will be vital in designing promising sulfur hosts for next generation sulfur cathodes in Li-S batteries.
Functional analysis of (4 S )-limonene synthase mutants reveals determinants of catalytic outcome in a model monoterpene synthase (2015)

Crystal structural data for (4S)-limonene synthase [(4S)-LS] of spearmint (Mentha spicata L.) were used to infer which amino acid residues are in close proximity to the substrate and carbocation intermediates of the enzymatic reaction. Alanine-scanning mutagenesis of 48 amino acids combined with enzyme fidelity analysis [percentage of (-)-limonene produced] indicated which residues are most likely to constitute the active site. Mutation of residues W324 and H579 caused a significant drop in enzyme activity and formation of products (myrcene, linalool, and terpineol) characteristic of a premature termination of the reaction. A double mutant (W324A/H579A) had no detectable enzyme activity, indicating that either substrate binding or the terminating reaction was impaired. Exchanges to other aromatic residues (W324H, W324F, W324Y, H579F, H579Y, and H579W) resulted in enzyme catalysts with significantly reduced activity. Sequence comparisons across the angiosperm lineage provided evidence that W324 is a conserved residue, whereas the position equivalent to H579 is occupied by aromatic residues (H, F, or Y). These results are consistent with a critical role of W324 and H579 in the stabilization of carbocation intermediates. The potential of these residues to serve as the catalytic base facilitating the terminal deprotonation reaction is discussed.
Creation of carbon nanotube based bioSensors through dielectrophoretic assembly (2015)

Due to their excellent electrical, optical, and mechanical properties, nanosized single wall carbon nanotubes (SWNTs) have attracted significant attention as a transducing element in nano-bio sensor research. Controlled assembly, device fabrication, and bio-functionalization of the SWNTs are crucial in creating the sensors. In this study, working biosensor platforms were created using dielectrophoretic assembly of single wall carbon nanotubes (SWNTs) as a bridge between two gold electrodes. SWNTs in a commercial SDS surfactant solution were dispensed in the gap between the two gold electrodes, followed by applying an ac voltage across the two electrodes. The dielectrophoresis aligns the CNTs and forms a bridge between the two electrodes. A copious washing and a subsequent annealing of the devices at 200 ᵒC remove the surfactants and create an excellent semiconducting (p-type) bridge between the two electrodes. A liquid gated field effect transistor (LGFET) was built using DI water as the gate dielectric and the SWNT bridge as the channel. Negative gate voltages of the FET increased the drain current and applying a positive gate voltage of +0.5V depleted the channel of charges and turned the device off. The biosensor was verified using both the two terminal and three terminal devices. Genomic salmon DNA dissolved in DI water was applied on the SWNT bridge in both type of devices. In the two terminal device, the conductance of the bridge dropped by 65x after the binding of the DNA. In the LGFET, the transconductance of the device decreased 2X after the binding of the DNA. The binding of the DNA also suppressed hysteresis in the Drain Current vs Gate Voltage characteristics of the LGFET.
A Switchable Rectifier-based LLC Resonant Converter for Photovoltaic Applications (2021)

The conventional LLC converter is popular among the resonant DC-DC converters. However, the switching frequency range limitation affects the operation of the converter under a wider voltage range. The far switching frequency operates away from the resonant frequency; the higher the circulating currents and the lower the overall efficiency are obtained. This paper presents a novel LLC resonant converter with a switchable rectifier that can regulate the photovoltaic panel’s wide low voltage range. The full-bridge circuit on the primary side and a voltage-tripler rectifier, a voltage-fifthfolder rectifier, and a voltage-sixfolder rectifier on the secondary side are employed in a single topology to overcome the disadvantages of the conventional LLC converter. By configuring the rectifier structure and utilizing frequency modulation, the voltage gain is extended with a narrow frequency range around the resonant frequency. In addition, the efficiency is improved, and the size of the transformer is reduced compared to those of the conventional LLC converter. Moreover, zero voltage switching (ZVS) and zero current switching (ZCS) are achieved in all power MOSFETs and power diodes. A 250W converter prototype generating 500 V DC output from a wide-input source was built and tested to verify the proposed converter’s feasibility and effectiveness.
Compressive Sensing Approach for Reducing the Number of Exposures in Multiple View Projection Holography (2010)

Compressive imaging enables the reconstruction of images from far fewer number of measurements predicted by classical sampling theorem. Here we demonstrate how this approach can dramatically reduce the number of exposures in multi-view projection holography.
Chloride Determination in Ionic Liquids (2005)

The determination of chloride impurities in water miscible and water immiscible ionic liquids has been explored using ion chromatography (IC) and cathodic stripping voltammetry (CSV). This paper shows the first quantification of chloride in [NTf2]- based ILs. The parameters investigated include sample preparation, solvent effect, sample stability, and limit of quantification (LOQ).
La cardiopatia ischemica nel paziente affetto da malattia renale cronica (2016)

Abstract non disponibile (Cardionephrology)