gebhart/patrepeval huggingface dataset:
New Digital Filter Techniques for Room Response Modeling (2002)

Computationally efficient modeling of room responses is needed in many audio and acoustics applications such as auralization, artificial reverberation, and equalization of loudspeaker-room responses for sound reproduction. Digital filtering is an efficient means for such modeling particularly in real-time implementations. In this paper we discuss new DSP-based methods to model measured room responses. Pole-zero modeling of dense modal patterns and temporal details is achieved by frequency-zooming ARMA modeling, i.e., by subband and multirate techniques. Another method is Kautz filtering that is attractive due to its orthonormal properties. The optimization of model filter parameters is discussed, the performance achieved is shown by example cases, and applications are shortly reviewed.
Isopropyl Alcohol-Sodium Sulfate-Water System. Liquid-Liquid Equilibria. (1957)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsopropyl Alcohol-Sodium Sulfate-Water System. Liquid-Liquid Equilibria.A. L. MillsA. L. MillsMore by A. L. Mills and F. A. SmithF. A. SmithMore by F. A. SmithCite this: Ind. Eng. Chem. Chem. Eng. Data Series 1957, 2, 1, 30–31Publication Date (Print):January 1, 1957Publication History Published online1 May 2002Published inissue 1 January 1957https://pubs.acs.org/doi/10.1021/i460002a008https://doi.org/10.1021/i460002a008research-articleACS PublicationsRequest reuse permissionsArticle Views421Altmetric-Citations9LEARN 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
ALOHA and Q-Learning based medium access control for Wireless Sensor Networks (2012)

This paper presents a novel Medium Access Control (MAC) protocol named ALOHA and Q-Learning based MAC with Informed Receiving (ALOHA-QIR) for Wireless Sensor Networks (WSNs). This scheme is implemented by combining frame based Slotted ALOHA and Q-Learning. ALOHA based schemes have the benefits of simplicity, low computation and overheads, but suffer collisions from the blind transmission strategy. By considering the previous transmission experience, Q-Learning offers nodes certain intelligence to access slots with a lower probability of collision. During data transmissions, receivers are informed by transmitters about their future slot selections so that the receivers can turn off their radio in other slots to save energy. Compared with basic Slotted ALOHA, ALOHA-QIR obtains significant improvements in throughput, delay and energy efficiency.
Stochastic Dominance and Expected Utility: Survey and Analysis (1992)

While Stochastic Dominance has been employed in various forms as early as 1932, it has only been since 1969–1970 that the notion has been developed and extensively employed in the area of economics, finance, agriculture, statistics, marketing and operations research. In this survey, the first-, second- and third-order stochastic dominance rules are discussed with an emphasis on the development in the area since the 1980s.
A new segmentation method for image sequence of traffic scenes (2004)

This paper describes a novel segmentation method for image sequence of traffic scenes recorded by a stationary camera. The process of segmentation includes two stages. In the first stage, the frame difference of the current frame is binarized, and the binary image of the frame difference is processed by morphological operation, then the current frame updates the background according to the binary image processed by morphology, and the background is extracted after dozens of iterative operations of the subsequent frames. In the second stage, the process of every frame is as follows: the noise parameters of the camera are derived from the histogram of the difference image between the current frame and background, and the double thresholds which segment the difference image are acquired from the histogram, and the difference image is binarized by the thresholds, then moving objects are found and the background is updated according to the segmentation result. The experiment results show that the method can realize segmentation effectively and quickly.
Peptidyl .alpha.-ketoheterocyclic inhibitors of human neutrophil elastase. 2. Effect of varying the heterocyclic ring on in vitro potency (1995)

A series of peptidyl alpha-ketoheterocycles were synthesized and evaluated for their in vitro inhibition of human neutrophil elastase (HNE). Several heterocycles, including oxazoline and benzoxazole, afforded extremely potent inhibitors of HNE (1p-r) with nanomolar to subnanomolar Ki values. The structure-activity relationships revealed that for compounds with a Ki < 1000 nM potency tends to be positively correlated with the sigma I value of the heterocycle. Furthermore, the results in this study support the hypothesis that, in the covalent enzyme-inhibitor adduct, the azole nitrogen atom of the inhibitor heterocycle participates in a hydrogen-bonding interaction with the active-site His-57.
A Low-Power Vertical-Incidence Ionosonde (1971)

Vertical-incidence (VI) ionospheric measurements, traditionally performed with 5- to 50-kW ionosondes, may be obtained alternatively using FM CW transmissions of much lower peak power. The FM signal must be interrupted periodically to permit both transmitting and receiving with a single antenna. An ionosonde of this type has been constructed and operated. The monostatic FM sounder radiates a peak power of 8 W and sweeps the frequency range of 0.5 to 30 MHz either linearly or logarithmically. Records from the FM ionosonde are comparable in time delay resolution, S/N, and overall quality to conventional pulse ionograms; the effects of interference from other HF users is somewhat less conspicuous on the FM sounder records. It is suggested that this advantage, plus the benefits of lower power operation, may make possible VI measurements under circumstances where a conventional pulse ionosonde is impractical.
Studies on the synthesis, structural characterization, Hirshfeld analysis and stability of apovincamine (API) and its co-crystal (terephthalic acid: Apovincamine=1:2) (2015)

Apovincamine and the corresponding co-crystal have been synthesized and characterized by single crystal XRD, FT-IR, UV, TGA/DSG. Components of the crystalline phase have also been investigated in terms of their corresponding Hirshfeld surface. In the crystal lattice, a three-dimensional hydrogen-bonded network is observed in the co-crystal, including the formation of a two-dimensional molecular scaffold. Hirshfeld surfaces and fingerprint plots indicate that the structures are stabilized by H⋯H, C−H⋯π, C–H⋯O and O–H⋯N intermolecular interactions. In this work, the co-crystal strategy has been applied successfully to apovincamine. One important parameter, i.e. solubility in water, has also been significantly improved, which proves to be an important factor for bioavailability. Furthermore, DSC/TGA analysis indicates that the co-crystal maintains its crystallinity up to 200 °C, suggesting a higher stability of the co-crystal compared to apovincamine.
Effect of urea and ammonium nitrate on the uptake of iron through leaves (1984)

Abstract Greenhouse experiment was conducted to study the effect of urea and ammonium nitrate on the uptake of iron through the leaves of plants. Iron from different sources was applied to the foliages of the plants with and without the addition of urea and ammonium nitrate. The iron solution used in the foliar spray contained 400 ppm of iron from FeSO4 · 7H2O, Fe‐EDTA and Fe‐amino acid chelate (Fe‐AA). The nitrogen concentrations in the final solution were 500 and 1000 ppm with half of the nitrogen from urea and other half from ammoniun nitrate. The addition of urea and ammonium nitrate increased the effectiveness of FeS04 · 7H2O used in foliar application. Urea and ammonium nitrate had no effect on Fe‐amino acid chelate but decreased the effectiveness of Fe‐EDTA when the nitrogen concentration was increased to 1000 ppm. On the average, Fe‐amino acid chelate increases the dry matter yield but not FeSO4 · 7H2O and Fe‐EDTA. Nitrogen alone did not significantly affect the dry matter yield. Higher iron concentration in the leaves was obtained by the use of Fe‐amino acid chelate than FeSO4 · 7H2O and Fe‐EDTA. With the chelates, more iron was translocated to the roots than with FeSO4 · 7H2O. Foliar application of Fe‐amino acid chelate increased the manganese concentration in the plants. Addition of urea and ammonium nitrate to the iron solution also increased the uptake of manganese. The increase in manganese in the plants by the foliar application of iron may contribut to the increase in dry matter yield. Key words: Amino Acid ChelateUreaAmmonium NitrateIronFoliar ApplicationCorn
Launch strategy for a GPS-based package tracker product (2006)

The objective of this paper is to present a recommendation for a launch strategy for a new Package Tracker Product based on enhanced GPS location technology for a GPS software company, Guardian Mobile Monitoring Systems. We will first give an overview of Global Positioning System (GPS) technology and its more recent advancements and explain the potential for a package tracker product. Secondly, we will examine possible target market segments. Thirdly, we will perform an internal analysis of Guardian Mobile Monitoring Systems including their current products and an external analysis of the industry. In conclusion, we will weigh three strategies and present a recommended strategy. We will elaborate on the recommended strategy and outline a potential high level implementation plan.
Embryonic Patterning in <i>Arabidopsis thaliana</i> (2007)

Early embryonic development in the flowering plant Arabidopsis thaliana follows a predictable sequence of cell divisions. Anatomical hallmarks and the expression of marker genes in dynamic patterns indicate that new cell fates are established with virtually every round of mitosis. Although some of the factors regulating these early patterning events have been identified, the overall process remains relatively poorly understood. Starting at the globular stage, when the embryo has approximately 100 cells, the organization of development appears to be taken over by programs that regulate postembryonic patterning throughout the life cycle.
Caffeine Content of Decaffeinated Coffee (2006)

Caffeine is the most widely consumed drug in the world with coffee representing a major source of intake. Despite widespread availability, various medical conditions necessitate caffeine-restricted diets. Patients on certain prescription medications are advised to discontinue caffeine intake. Such admonition has implications for certain psychiatric patients because of pharmacokinetic interactions between caffeine and certain anti-anxiety drugs. In an effort to abstain from caffeine, patients may substitute decaffeinated for caffeinated coffee. However, decaffeinated beverages are known to contain caffeine in varying amounts. The present study determined the caffeine content in a variety of decaffeinated coffee drinks. In phase 1 of the study, 10 decaffeinated samples were collected from different coffee establishments. In phase 2 of the study, Starbucks espresso decaffeinated (N=6) and Starbucks brewed decaffeinated coffee (N=6) samples were collected from the same outlet to evaluate variability of caffeine content of the same drink. The 10 decaffeinated coffee samples from different outlets contained caffeine in the range of 0-13.9 mg/16-oz serving. The caffeine content for the Starbucks espresso and the Starbucks brewed samples collected from the same outlet were 3.0-15.8 mg/shot and 12.0-13.4 mg/16-oz serving, respectively. Patients vulnerable to caffeine effects should be advised that caffeine may be present in coffees purported to be decaffeinated. Further research is warranted on the potential deleterious effects of consumption of "decaffeinated" coffee that contains caffeine on caffeine-restricted patients. Additionally, further exploration is merited for the possible physical dependence potential of low doses of caffeine such as those concentrations found in decaffeinated coffee.
The Haemophilus ducreyi cytolethal distending toxin activates sensors of DNA damage and repair complexes in proliferating and non-proliferating cells (2002)

Cytolethal distending toxins (CDTs) block proliferation of mammalian cells by activating DNA damage-induced checkpoint responses. We demonstrate that the Haemophilus ducreyi CDT (HdCDT) induces phosphorylation of the histone H2AX as early as 1 h after intoxication and re-localization of the DNA repair complex Mre11 in HeLa cells with kinetics similar to those observed upon ionizing radiation. Early phosphorylation of H2AX was dependent on a functional Ataxia Telangiectasia mutated (ATM) kinase. Microinjection of a His-tagged HdCdtB subunit, homologous to the mammalian DNase I, was sufficient to induce re-localization of the Mre11 complex 1 h post treatment. However, the enzymatic potency was much lower than that exerted by bovine DNase I, which caused marked chromatin changes at 106 times lower concentrations than HdCdtB. H2AX phosphorylation and Mre11 re-localization were induced also in HdCDT-treated, non-proliferating dendritic cells (DCs) in a differentiation dependent manner, and resulted in cell death. The data highlight several novel aspects of CDTs biology. We demonstrate that the toxin activates DNA damage-associated molecules in an ATM-dependent manner, both in proliferating and non-proliferating cells, acting as other DNA damaging agents. Induction of apoptotic death of immature DCs by HdCDT may represent a previously unknown mechanism of immune evasion by CDT-producing microbes.
Untersuchungen über die Zusammenhänge zwischen Struktur und Antitumorwirkung bei <i>cis</i>‐Dichloro[bis(oligopeptidester)]platin‐(II)‐Komplexen (1983)

Abstract Die in vitro‐Testung von 12 cis ‐Dichloro[bis(oligopeptidester)]platin(II)‐Komplexen ( cis ‐[PtA 2 Cl 2 ]; A = Di‐ bzw. Tripeptidester) an der ADJ/PC6‐Plasmacytom‐Zellsuspension ergab eine starke Abhängigkeit der [ 3 H]‐Thymidin‐Einbauhemmung von der Struktur des Liganden A. Die Ergebnisse korrelieren mit denen der in vivo‐Testung am ADJ/PC6‐Plasmacytom der BALB/c‐Maus. Als aktivste Verbindung erwies sich cis ‐Pt(GlyGlyOEt) 2 Cl 2 .
Evidence for extrachromosomal elements in Lactobacillus (1976)

Three strains of lactobacilli, Lactobacillus casei subsp. casei 64H, L. casei subsp. rhamnosus OC91, and L. coryniformis M34, were examined for the presence of plasmids. Plasmids of molecular weights of 23 x 10(6) and 16 x 10(6) were found in the first two strains respectively. This represents the first evidence for plasmids in lactobacilli; their function is not presently known.
A Thermostable Salmonella Phage Endolysin, Lys68, with Broad Bactericidal Properties against Gram-Negative Pathogens in Presence of Weak Acids (2014)

Resistance rates are increasing among several problematic Gram-negative pathogens, a fact that has encouraged the development of new antimicrobial agents. This paper characterizes a Salmonella phage endolysin (Lys68) and demonstrates its potential antimicrobial effectiveness when combined with organic acids towards Gram-negative pathogens. Biochemical characterization reveals that Lys68 is more active at pH 7.0, maintaining 76.7% of its activity when stored at 4°C for two months. Thermostability tests showed that Lys68 is only completely inactivated upon exposure to 100°C for 30 min, and circular dichroism analysis demonstrated the ability to refold into its original conformation upon thermal denaturation. It was shown that Lys68 is able to lyse a wide panel of Gram-negative bacteria (13 different species) in combination with the outer membrane permeabilizers EDTA, citric and malic acid. While the EDTA/Lys68 combination only inactivated Pseudomonas strains, the use of citric or malic acid broadened Lys68 antibacterial effect to other Gram-negative pathogens (lytic activity against 9 and 11 species, respectively). Particularly against Salmonella Typhimurium LT2, the combinatory effect of malic or citric acid with Lys68 led to approximately 3 to 5 log reductions in bacterial load/CFUs after 2 hours, respectively, and was also able to reduce stationary-phase cells and bacterial biofilms by approximately 1 log. The broad killing capacity of malic/citric acid-Lys68 is explained by the destabilization and major disruptions of the cell outer membrane integrity due to the acidity caused by the organic acids and a relatively high muralytic activity of Lys68 at low pH. Lys68 demonstrates good (thermo)stability properties that combined with different outer membrane permeabilizers, could become useful to combat Gram-negative pathogens in agricultural, food and medical industry.
Regulation of phospholipase D activity in a human oligodendroglioma cell line (HOG) (1993)

Oligodendroglial cells express many specific proteins, such as myelin basic protein (MBP), which are physiologically phosphorylated by protein kinase C (PKC). Diacylglycerols are physiological activators of PKC and can be liberated from phospholipids by the direct receptor-mediated activation of phospholipase C (PL-C) or indirectly via the activation of phospholipase D (PL-D). In a well-characterized human oligodendroglioma (HOG) cell line, PL-C (measured by release of [3H]inositol phosphates) and PL-D (formation of [3H]myristoylated or palmitoylated phosphatidylethanol) were activated by both carbachol (blocked by pirenzepine, suggesting an M1 receptor) and histamine (H1 receptor) but not glutamate, bradykinin, or phenylephrine. PL-C stimulation by carbachol or histamine was completely inhibited by short-term treatment (< 30 min) with phorbol ester (TPA), a PKC activator. In contrast, PL-D activation by either carbachol or histamine was stimulated in additive fashion by TPA, suggesting at least two distinct mechanisms for PL-D activation. Down regulation of PKC by prolonged (24 hr) treatment with TPA reversed the inhibitory effects of TPA on PL-C and the stimulatory effects on PL-D. However, the PKC inhibitors H-7 and galactosylsphingosine did not inhibit the TPA-mediated stimulation of PLD while the less-specific PKC inhibitor, staurosporine, was only partially inhibitory. Preexposure of cells to carbachol, greatly reduced both PL-C and PL-D activation by carbachol, suggesting homologous desensitization. Time-course studies indicated that PL-D activation (10 sec or less) was at least as fast as PL-C activation, and the affinity of carbachol and histamine for the receptor coupled to either phospholipase (EC50 = 5-10 microM) was about the same.(ABSTRACT TRUNCATED AT 250 WORDS)
Chimeras of human extracellular and intracellular superoxide dismutases. Analysis of structure and function of the individual domains (1999)

Human extracellular superoxide dismutase (hEC-SOD) is a secreted tetrameric protein involved in protection against oxygen free radicals. Since EC-SOD is too large a protein for structural determination by multi-dimensional NMR and attempts to crystallize the protein for X-ray structural determination have failed, the three-dimensional structure of hEC-SOD is unknown. By fusion protein techniques we have previously shown that an amphipathic alpha-helix in the N-terminal domain of hEC-SOD is essential for the tetramer interaction. However, the central domain, which is homologous to intracellular hCuZnSOD, has also been proposed to be involved in the tetramer formation. Despite great efforts, the production of recombinant hEC-SOD in prokaryotic systems or simple eukaryotes (such as yeast) has failed. This lack of success has greatly complicated large-scale production and genetic engineering of the protein. In the study reported here, we constructed two chimeras comprising the N- or the N- and C-terminal domains from hEC-SOD fused to hCuZnSOD, called FusNCZ and PseudoEC-SOD, respectively. We show that these proteins can be produced in large quantities in Escherichia coli, that they can be purified with high yields and that the characteristics of PseudoEC-SOD closely resemble those of hEC-SOD. Further, we extended our studies of the nature of the subunit interaction by investigating the involvement of the central domain.
<i>Smart Variations</i>: Functional Substructures for Part Compatibility (2013)

Abstract As collections of 3D models continue to grow, reusing model parts allows generation of novel model variations. Naïvely swapping parts across models, however, leads to implausible results, especially when mixing parts across different model families. Hence, the user has to manually ensure that the final model remains functionally valid. We claim that certain symmetric functional arrangements ( s F arr ‐s), which are special arrangements among symmetrically related substructures, bear close relation to object functions. Hence, we propose a purely geometric approach based on such substructures to match, replace, and position triplets of parts to create non‐trivial, yet functionally plausible, model variations. We demonstrate that starting even from a small set of models such a simple geometric approach can produce a diverse set of non‐trivial and plausible model variations.
Voltage and current ripple considerations for improving lifetime of Ultra-Capacitors used for energy buffer applications at converter inputs (2010)

While Ultra Capacitors offer high power density, high cycling capability and mechanical robustness. Voltage and current ripple from downstream PWM converters result in their heating and lifetime reduction. This paper discusses how a simple novel design scheme of using a very low value series inductance significantly increases capacitor lifetime.
On the solution-space geometry of random constraint satisfaction problems (2006)

For a number of random constraint satisfaction problems, such as random k-SAT and random graph/hypergraph coloring, there are very good estimates of the largest constraint density for which solutions exist. Yet, all known polynomial-time algorithms for these problems fail to find solutions even at much lower densities. To understand the origin of this gap we study how the structure of the space of solutions evolves in such problems as constraints are added. In particular, we prove that much before solutions disappear, they organize into an exponential number of clusters, each of which is relatively small and far apart from all other clusters. Moreover, inside each cluster most variables are frozen, i.e., take only one value. The existence of such frozen variables gives a satisfying intuitive explanation for the failure of the polynomial-time algorithms analyzed so far. At the same time, our results establish rigorously one of the two main hypotheses underlying Survey Propagation, a heuristic introduced by physicists in recent years that appears to perform extraordinarily well on random constraint satisfaction problems.