gebhart/patrepeval huggingface dataset:
Edge diffraction in computer modeling of room acoustics (2006)

Computer modeling in room acoustics is typically based on geometrical acoustics techniques. Limitations with such methods include, among other things, a lack of diffraction modeling, which primarily leads to inaccuracies at low frequencies. The inclusion of diffraction modeling is quite straightforward for first-order diffraction, which can be combined with specular reflections of any order. One impractical aspect, however, is that the number of diffraction components can be extremely high, and grows faster (with the reflection order) than the number of specular reflections does. At the same time, the importance, or magnitude, of the diffraction components will differ over an immense range. This variation can be exploited by estimating the importance of each diffraction contribution by the magnitude of its onset, and skipping the remainder of the calculations for those that are deemed too weak. This will be demonstrated for some typical geometrical cases including a set of overhead reflectors, an orchestra pit, and a convex hall shape for which diffraction is less critical. Results indicate that ‘‘diffraction culling’’ can provide a significant reduction in computation time with only small effects on the overall responses for the tested geometries. [This research has been supported by the Research Council of Norway].
Do We Need Dereverberation for Hand-Held Telephony? (2010)

The necessity of dereverberation algorithms in hand-held speech communication systems is discussed in this contribution. The study is based on a new measurement campaign with artificial head and a two-microphone mock-up phone in realistic acoustical environments like an office, corridor and stairway. Based on objective speech quality measures as well as a listening test, we show that room reverberation can lead to a decrease in intelligibility even for hand-held telephony under certain conditions. Hence, the far-end listener can benefit from dereverberation algorithms in the sending device. All measured room impulse responses are available online as part of the Aachen Impulse Response (AIR) database.
Cyclic Redundancy Check Computation: An Implementation Using the TMS320C54x (1999)

Cyclic redundancy check (CRC) code provides a simple, yet powerful, method for the detection of burst errors during digital data transmission and storage. CRC implementation can use either hardware or software methods. This application report presents different software algorithms and compares them in terms of memory and speed using the Texas Instruments (TI™) TMS320C54x digital signal processor (DSP). Various common CRC codes will be used.
ChemInform Abstract: Glass Transition and IR Spectra of Low‐Alkali, Anhydrous Lithium Phosphate Glasses. (1993)

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.
Preparation of Three-Dimensionally Ordered Inorganic/Organic Bi-Continuous Composite Proton Conducting Membranes (2005)

Polystyrene (PS) particles were self-assembled into an ordered face-centered-cubic arrangement with a silica sol−gel filling in the voids. The PS was solvent extracted producing a microporous ordered silica structure. The pores of the silica opal were filled with proton conducting sulfonated poly(arylene ether sulfone). The material is ordered, and both the inorganic and the organic phases are continuous.
Novel MRC Pakcing Channel Estimation Scheme for PER Enhancement of IEEE 802.11p (2018)

최근 자율 주행 차량의 발전과 더불어 차량 간 협력주행을 위한 V2X(Vehicle-to-everything) 통신기술의 필요성이 대두되고 있다. 본 논문에서는 WAVE(Wireless Access for Vehicular Environments) 기반의 차량 간 고속이동 통신 환경에서 802.11p 물리계층 패킷 에러율 성능향상을 위한 다중 수신안테나 기반 새로운 다이버시티 채널 추정 기법을 제안한다. 제안하는 기법은 우선 각 수신 안테나에서 초기 추정된 채널을 이용하여 MRC(Maximum Ratio Combining) 결합으로 데이터를 복원한 후 복원된 데이터를 파일럿으로 활용하여 다시 각 안테나의 채널을 MRC 패킹(packing)과정을 통해 추정함으로써 최대 수신 다이버시티 이득을 얻는다. 제안하는 기법의 성능 검증을 위해 본 논문에서는 Cohda Wireless 사에서 제시한 실측 채널 환경에서 모의실험을 실시한 결과를 소개하며, 이를 통해 기존 WAVE채널 추정 기법 대비 제안하는 기법의 패킷 에러율 성능의 우수성을 입증한다.
Hybrid Data Fusion and Cooperative Schemes for Wireless Positioning (2008)

The wireless hybrid enhanced mobile radio estimators (WHERE) consortium researches radio positioning techniques to improve various aspects of communications systems. In order to provide the benefits of position information available to communications systems, hybrid data fusion (HDF) techniques estimate reliable position information. Within this paper, we first present the scenarios and radio technologies evaluated by the WHERE consortium for wireless positioning. We compare conventional HDF approaches with two novel approaches developed within the framework of WHERE. Yet, HDF may still provide insufficient localization accuracy and reliability. Hence, we will research and develop new cooperative positioning algorithms, which exploit the available communications links among mobile terminals of heterogeneous wireless networks, to further enhance the positioning accuracy and reliability.
2427 Unsteady Flow in Pump Sump (2006)

Numerical calculations were carried out on unsteady flows in a pump sump with a cylindrical suction pipe using a commercial CFD code (CFX-10.0) in order to investigate the mechanism of the air-entraining vortex generation. The calculated results show that the dimple generated behind a suction pipe moves to the downstream with growing up, and the air-entraining vortices generated when the dimple reaches the vortex from a suction pipe. The calculated geometry of water surface in a pump sump near a suction pipe was compared with one measured by moire method. The dimple on the surface behind the suction pipe was found to grow up to the air-entraining vortex. The measured and calculated results agree well. As a result of the present study, it was found that mechanism of the entraining-vortex generation can be captured by CFD.
Extending the Best Linear Approximation for Frequency Translating Systems: The Best Mixer Approximation (2007)

True physical modelling of a mixer is a tedious task. In this paper the true behavior of a mixer is approximated by a so called Best (in a mean squares sense) Mixer Approximation (BMA) for the class of Gaussian excitation signals with a given power spectrum (rms value and coloring). This class of signals includes random phase multisines and special modulated signals, such as W-CDMA, OFDM and QAM signals.
High data rate recording at over 60 Mbytes per second (1999)

High data rate recording is dependent on the speed of the write driver electronics and the intrinsic head response. The relationship between head response and head design is studied by finite element modeling. The primary parameters studied are head yoke length, head geometry, and number of coil turns. The head designs are tested using an experimental write driver with a 0.9 ns 10-90% risetime. The risetime of the driver is varied from 0.9 to 3.0 ns by adding capacitance at its output. The parametric and BER performance of three different head designs reveal a strong dependence of maximum data rate capability on the head efficiency and response. The best design showed low BER performance for writing to data rates slightly above 60 MB/s while reading at 15 MB/s with a PRML channel using a (0,4,4) run-length-limited code.
Transient Analysis of Multicavity Klystrons (1988)

We describe a model for analytic analysis of transients in multicavity klystron output power and phase. Cavities are modeled as resonant circuits, while bunching of the beam is modeled using linear space-charge wave theory. Our analysis has been implemented in a computer program which we use in designing multicavity klystrons with stable output power and phase. We present as examples transient analysis of a relativistic klystron using a magnetic pulse compression modulator, and of a conventional klystron designed to use phase shifting techniques for RF pulse compression. 4 refs., 4 figs.
Three‐day lansoprazole quadruple therapy for Helicobacter pylori‐positive duodenal ulcers: a randomized controlled study (2001)

The 3-day quadruple therapy is highly effective, better tolerated and can be considered as a first-line therapy in duodenal ulcer management.
An overview of wavelet estimation using free-surface multiple removal (2000)

The goal of true-amplitude processing is to relate the measured seismic amplitudes to earth reflectivity in an absolute sense. A significant barrier to this longstanding objective has been the difficulty of estimating and removing the source effects from our seismic data. To illustrate the need for this, let us assume the simple model that the data contain reflection coefficients convolved with some source waveform. It is clear that we cannot properly analyze these reflection coefficients without first removing the phase and amplitude effects of the source. Fortunately, geophysicists have been able to extract much useful information through relative amplitude processing and will continue to do so in the future. However, the increasing demands placed on the fidelity of seismically derived information for tasks such as reservoir characterization heighten the need for better source wavelet estimation to bring us closer to processing absolute amplitudes.
Use of the membrane invasion culture system (mics) as a screen for anti‐invasive agents (1989)

The Membrane Invasion Culture System (MICS) assay was adapted for relatively rapid screening of compounds and used to identify anti-invasive drugs that inhibit human and murine tumor cell migration through a reconstituted basement membrane in vitro. Cell lines demonstrating low and high invasive and metastatic potentials were tested with all compounds for tumoricidal effects prior to evaluation in MICS at non-cytotoxic doses. The effect on invasive potential in the MICS assay was determined in 3 categories: (1) 48 hr drug pre-treatment prior to seeding in the MICS (exceptions: 90 min pre-treatment with pertussis toxin and, for some studies, continuous exposure for 2-7 days); (2) peptide or prostaglandins 2 hr after seeding and attachment to the membranes in MICS followed by continuous exposure; and (3) cells receiving neither drug nor peptide treatment and serving as controls in each MICS chamber. Since invasion involves cellular motility and deformability, some cytoskeleton disrupting agents were selected. Of these, vincristine, colcemid and colchicine inhibited invasion but taxol did not. Pre-treatment with cAMP agonists produced conflicting results: dibutyryl cAMP and 8-(4-chloro-phenylthio) cAMP resulted in 50% and 38% reduction in invasion, respectively, whereas 8-bromo cAMP stimulated invasive potential by 30%. Forskolin and cholera toxin both significantly reduced invasiveness. Pre-treatment with 5-azacytidine and araC, to consider the role of methylation and proliferations decreased invasive ability. Anti-metastatic drugs such as gamma-interferon and razoxane inhibited invasive potential but to varying degrees. Treatment of cells with prostaglandins E2, F2 alpha, A2, and D2 were ineffectual; however, indomethacin mildly inhibits invasion (less than 30%).(ABSTRACT TRUNCATED AT 250 WORDS)
Untersuchungen zur Funktion von Pex8p im peroxisomalen Matrixproteinimport der Hefe Saccharomyces cerevisiae (2004)

Im Rahmen der in dieser Arbeit durchgeführten Two-Hybrid-Analysen wurden Pex7p, Pex14p und Pex8p als neue Interaktionspartner von Pex8p identifiziert. Interaktionen mit weiteren Peroxinen der Docking-Maschinerie, zu Peroxinen der Zinkfinger-Klasse und Peroxinen anderer Funktionskreise wurden nicht festgestellt. Der Interaktionsbereich zwischen Pex8p und Pex5p, Pex8p und Pex14p konnte auf die Aminosäuren 146-586 von Pex8p eingeengt werden. Der Interaktionsbereich zwischen Pex8p und Pex7p konnte nicht eingeengt werden. Pex7p benötigt zur Interaktion zu Pex8p das gesamte Pex8-Protein. Zur Interaktion mit Pex8p (146-586 aa) benötigt Pex5p die Aminosäuren 1-312. Die TPR-Domänen von Pex5p sind für die Interaktion zwischen Pex5p und Pex8p entbehrlich. Die Interaktion zwischen Pex8p und Pex14p wird sowohl von Peroxinen der Funktionskreise "Cargo-Rezeptor-Bindung", "Docking-Maschinerie" und "Rezeptor-Translokation" beeinflusst und ist daher indirekt. Die Interaktionen zwischen Pex8p und Pex5p sowie Pex8p und Pex7p werden durch kein Peroxin der untersuchten Funktionskreise vermittelt und scheinen daher direkt zu sein. Im Rahmen der Mutationsanalyse von Pex8p wurden drei Mutationen identifiziert, welche die Interaktion zwischen Pex8p und Pex5p, Pex7p und Pex14p auf unterschiedliche Weise unterbinden. Mutation Pex8pM-A(S231P) unterbindet die Interaktion zu Pex5p, Pex7p und Pex14p. Mutation Pex8pM-C(A238V) unterbindet die Interaktion zu Pex5p und Pex14p. Mutation Pex8pM-D(T327P) unterbindet die Interaktion zu Pex7p und Pex14p. Damit scheinen beide Rezeptoren für die Interaktion zwischen Pex8p und Pex14p notwendig zu sein. Die Pex8p-Deletionsmutante kann durch alle mutierten Pex8-Proteine komplementiert werden. Ebenfalls werden in diesen komplementierten pex8D-Zellen fluoreszenzmarkierte Cargoproteine in Peroxisomen importiert. Aufgrund der Mutationsanalysen von Pex8p ist es wahrscheinlich, dass Pex8p eine Lösung des Cargo-Rezeptor-Komplexes durch Konformationsänderung des Rezeptors bewirkt. Das Targeting von Pex8p zur peroxisomalen Membran in Abhängigkeit der PTS-Rezeptoren kann trotz der PTS- Signale innerhalb der Pex8p-Aminosäuresequenz ausgeschlossen werden. Dies wird durch Analysen zur Extrahierbarkeit des Proteins aus peroxisomalen Membranen unterstützt. Pex8p ist bei Abwesenheit von Pex5p für Proteinase K zugänglich. Somit beeinflußt Pex5p nicht das Targeting von Pex8p aber indirekt dessen Zugänglichkeit zu cytosolischen Komponenten.
Potato Seed Piece Calcium can Influence Tuber Yield (1996)

Pathogenic bacteria ( Erwinia spp.) can have a significant impact on stand establishment and sprout health. These bacteria cause soft rot of the seed piece, which is common in wet spring conditions resulting in great economic loss. Recent studies have demonstrated that the incidence and severity of soft rot can be significantly reduced by increasing tuber calcium. We investigated the influence of seed piece calcium on tuber production. Field growing potato plants were treated with supplemental calcium during tuber bulking (calcium at 168 kg·ha –1 from calcium nitrate or N-Hib) to increase the seed tuber medullary calcium levels. All three cultivars (`Superior', `Atlantic', `Dark Red Norland') responded to supplemental calcium application with increases in mean calcium contents, even though soil tests showed high native calcium levels (1000 kg·ha –1 ). Seed tubers were sampled for calcium by removing a longitudinal slice from the center of each tuber and planting one of the resulting halves for seed piece decay evaluation and the other for yield evaluation. Calcium nitrate-treated seed tubers produced higher yields compared to ammonium nitrate and N-Hib in `Atlantic' in `Dark Red Norland'. This trend did not hold true for `Superior'. Our results suggest that a) it is possible to increase seed piece tuber calcium levels with supplemental calcium application even in soils testing high in calcium and b) improving the calcium concentration of the seed piece can increase tuber yield in some cultivars.
Nordic Snow Radar Experiment (2016)

Abstract. The objective of the Nordic Snow Radar Experiment (NoSREx) campaign was to provide a continuous time series of active and passive microwave observations of snow cover in a representative location of the Arctic boreal forest area, covering a whole winter season. The activity was a part of Phase A studies for the ESA Earth Explorer 7 candidate mission CoReH2O (Cold Regions Hydrology High-resolution Observatory). The NoSREx campaign hosted two main microwave instruments; a frequency scanning scatterometer operating on frequencies from X- to Ku band, and a microwave dual-polarization radiometer system operating from X- to W-bands. In situ measurements consisted of manual snow pit measurements at the main test site as well as extensive automated measurements on snow, ground and meteorological parameters. This study provides a summary of the obtained data, detailing measurement protocols for both microwave instruments and in situ reference data. A first analysis of the microwave signatures against snow parameters is given. All data, including the raw data observations, are available through the European Space Agency and the Finnish Meteorological Institute for research purposes. A consolidated dataset of observations, comprising of the key microwave and in situ observations, is provided through the ESA campaign data portal to enable easy access to the data.
Wireless Transfer of Power and Data Via a Single Resonant Inductive Link (2019)

A novel circuit design for wireless power and signal transfer using a single resonant inductive link is presented. On the transmitter side, a self-oscillating relay feedback circuit automatically generates a carrier signal near the resonance and drives the transmitter coil. A tunable phase shifter made of two cascaded first-order allpass filters is inserted in the relay feedback loop to modulate the carrier amplitude in accordance with the input signal. On the receiver side, a bridge rectifier and a voltage regulator are used for AC-to-DC power conversion, and also a bandpass filter is added to perform amplitude demodulation for extracting the signal from the carrier. The proposed 1.1MHz inductive link has been successfully implemented on a 2.5W wireless speaker. It allows music being played on a speaker without any connection to a power cable and an audio line. The measurement shows that the total harmonic distortion plus noise for a 1kHz sinusoidal signal being transferred can be as low as 1%.
ChemInform Abstract: X=Y‐ZH Systems as Potential 1,3‐Dipoles. Part 36. 1,5‐ Electrocyclization Processes via Oxidation of Tertiary Amines. Pyrrolo‐ dihydroisoquinolines and ‐dihydro‐β‐carbolines. (1993)

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.
Mass Spectral Studies. III. Fragmentation of Aromatic Amides (1964)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMass Spectral Studies. III. Fragmentation of Aromatic AmidesK. G. Das, Phillip T. Funke, and Ajay K. BoseCite this: J. Am. Chem. Soc. 1964, 86, 18, 3729–3732Publication Date (Print):September 1, 1964Publication History Published online1 May 2002Published inissue 1 September 1964https://pubs.acs.org/doi/10.1021/ja01072a023https://doi.org/10.1021/ja01072a023research-articleACS PublicationsRequest reuse permissionsArticle Views449Altmetric-Citations31LEARN 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
Using feature-level fusion for multimodal gender recognition for opinion mining videos (2019)

Video has rich content and has recently received considerable attention for opinion mining and sentiment analysis, especially with the growing volume of online videos in social networks. However, it has been proved that machine-learning techniques for sentiment analysis are gender biased, i.e. can be more accurate for one gender than the other. Hence, if gender can be recognized early, it can lead to improving the sentiment analysis results. This paper explores multimodal analysis of video data to extract features and build gender recognition models. Different methods are evaluated for unimodal, bimodal and trimodal systems using features from three modalities: visual, audio, and text. The proposed system is evaluated and the results revealed that the fusion of multiple modalities at the feature level can have significant impact on the performance of gender recognition as compared to unimodal models.
Molecular basis of congenital adrenal hyperplasia in two siblings with classical nonsalt-losing 3 beta-hydroxysteroid dehydrogenase deficiency. (1994)

We report mutations of the type II 3 beta-hydroxysteroid dehydrogenase (3 beta HSD) gene in two siblings, male and female, with congenital adrenal hyperplasia caused by classical nonsalt-losing 3 beta HSD deficiency. During childhood, the male sibling, born with ambiguous genitalia, and the female sibling, born with normal genitalia, both manifested symptoms of mild androgen excess; both apparently had normal zona glomerulosa function. Gonadal dynamic study at puberty showed the presence of partial gonadal 3 beta HSD deficiency in both siblings despite their spontaneous pubertal maturation. The 5'-region as well as exons I-II, III, and IV and portions of the adjacent introns of the type II 3 beta HSD gene were amplified by polymerase chain reaction and sequenced. In both siblings and their mother, an identical single nucleotide substitution mutation in intron III, six bases up-stream from exon IV, was identified in one allele. This mutation, G to A at nucleotide 6651, may create a new splicing junction and affect the normal splicing of the messenger ribonucleic acid. In the other allele of both siblings, a missense mutation from GGG (Gly) to AGG (Arg) at codon 129 (G129R) in exon IV was found. We assessed the effect of the G129R missense mutation on enzymatic activity by in vitro analysis of the mutant recombinant enzyme generated by site-directed mutagenesis after its transient expression in COS-1 cells. Using homogenates from transfected cells, the G129R 3 beta HSD enzyme showed a Km value for pregnenolone of 10 +/- 2 mumol/L compared with 1.00 +/- 0.03 mumol/L for the wild-type type II 3 beta HSD enzyme. When dehydroepiandrosterone was used as substrate, the Km value for G129R3 beta HSD was 14 +/- 2 mumol/L compared with 2.1 +/- 0.2 mumol/L for the wild-type II 3 beta HSD enzyme. In addition to an apparent decrease in affinity, the G129R mutation caused a marked decrease in the apparent relative specific activity, thus leading to apparent relative specific efficiencies (relative specific activity/Km) of 2.0% and 4.7% that of the normal type II 3 beta HSD using pregnenolone or dehydroepiandrosterone as substrate, respectively. It appears likely that this low level of activity is sufficient to prevent salt loss, but it is also possible that part of the enzymatic activity comes from the putative remaining percentage of correctly spliced n6651 allele in these patients.