gebhart/patrepeval huggingface dataset:
A technique for the synthesis of shaped-beam radiation patterns with approximately equal-percentage ripple (1967)

A new pattern synthesis technique which leads to shaped-beam patterns of approximately equal percentage or dB ripple is discussed. The method is based on the controlled location of the zeros of the pattern function in the complex pattern plane with the relative displacement of these zeros from the real <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sin \theta</tex> axis determining the magnitude of ripple obtained with the synthesized pattern. In applying the technique, the locations are approximately constrained by starting with a fan or sector pattern having known zero locations. The sector pattern is then warped or perturbed to the pattern of desired shape by deterministic perturbations of the zeros. It is found that the design ripple of the sector pattern is approximately maintained during this process. A trade-off exists between ripple magnitude and maximum normalized slope of the approximating pattern function. Independent control of ripple level within the shaped-beam region and of sidelobe level without is achieved. Several examples of shaped-beam patterns (including <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\csc^{2} \theta</tex> patterns) are presented and discussed.
Single femtosecond pulse nanochannel formation in glass (2010)

Single pulse femtosecond laser damage in transparent dielectrics has been shown to occur through nonlinear damage mechanisms that can allow material removal on scales well below the classical limit of the order of the wavelength of the incident light. These mechanisms can be harnessed to allow the optical machining of devices on the nanoscale. We observe the formation of high aspect-ratio nanochannels by single femtosecond pulses. These channels, several microns in length, can be formed at the front or rear surface of a sample, corresponding to conditions under which spherical aberration is expected and where it is minimized. The presence of similar channels at both locations suggests that aberration does not play a critical role in nanochannel creation, and we present evidence supporting a dominant role of self focusing and microscale filamentation. Applications for these long nanoscale diameter channels include nanopores, nanowells, or out-of-plane vias. The ability to generate these channels with single pulses allows rapid fabrication that complements existing techniques, thus addressing a major limitation to fabrication of microfluidics and nanopores.
A prototype protein field-effect transistor (2005)

Electrical conduction in a macroscopic assembly of apoferritin, a non-redox protein, has been characterized using a three-terminal prototype device. Our result shows an ohmic conduction near zero bias. The ohmic conduction can be controlled using an electric field applied to the protein assembly via the gate terminal of the device. The transconductance of the protein device shows a highly nonlinear dependence on the gate voltage. The transconductance curve indicates that the device has the attributes of an n-channel metal-oxide-semiconductor field-effect transistor with electrons as charge carriers. The input/output dynamic response of the device has been demonstrated.
X‐Ray Excited Luminescence Chemical Imaging of Bacterial Growth on Surfaces Implanted in Tissue (2015)

A pH sensor film is developed that can be coated on an implant surface and imaged using a combination of X-ray excitation and visible spectroscopy to monitor bacterial infection and treatment of implanted medical devices (IMDs) through tissue. X-ray scintillators in the pH sensor film generate light when an X-ray beam irradiates them. This light first passes through a layer containing pH indicator that alters the spectrum according to pH, then passes through and out of the tissue where it is detected by a spectrometer. A reference region on the film is used to account for spectral distortion from wavelength-dependent absorption and scattering in the tissue. pH images are acquired by moving the sample relative to the X-ray beam and collecting a spectrum at each location, with a spatial resolution limited by the X-ray beam width. Using this X-ray excited luminescence chemical imaging (XELCI) to map pH through ex vivo porcine tissue, a pH drop is detected during normal bacterial growth on the sensor surface, and a restoration of the pH to the bulk value during antibiotic treatment over the course of hours with milli-meter resolution. Overall, XELCI provides a novel approach to noninvasively image surface pH for studying implant infections and treatments.
Identification of <b> <i>post‐mortem</i> </b> cerebrospinal fluid proteins as potential biomarkers of ischemia and neurodegeneration (2004)

Only few biological markers are currently available for the routine diagnosis of brain damage-related disorders including cerebrovascular, dementia, and other neurodegenerative diseases. In this study, post-mortem cerebrospinal fluid samples were used as a model of massive brain insult to identify new markers potentially relevant for neurodegeneration. The protein pattern of this sample was compared to the one of cerebrospinal fluid from healthy subjects by two-dimensional gel electrophoresis. Using gel imaging, N-terminal microsequencing, mass spectrometry, and immunodetection techniques, we identified 13 differentially expressed proteins. Most of these proteins have been previously reported to be somehow associated with brain destruction or with the molecular mechanisms underlying certain neurodegenerative conditions. These data indicate that the identified proteins indeed represent potential biomarkers of brain damage. We recently showed that H-FABP, a protein highly homologous to E-FABP and A-FABP identified in this study, is a potential marker of Creutzfeldt-Jakob disease and stroke.
Structural characterization of a high-molecular-mass form of calcitonin [procalcitonin-(60–116)-peptide] and its corresponding <i>N</i>-terminal flanking peptide [procalcitonin-(1–57)-peptide] in a human medullary thyroid carcinoma (1988)

Four peptides derived from procalcitonin were isolated in high yield from an extract of a human medullary thyroid carcinoma. The peptides were identified as procalcitonin-(1-57)-peptide, procalcitonin-(60-91)-peptide (calcitonin), procalcitonin-(60-116)-peptide and procalcitonin-(96-116)-peptide (katacalcin). Determination of the amino acid sequence of procalcitonin-(1-57)-peptide has demonstrated that the Ala25-Ala26 bond in preprocalcitonin is the site of cleavage of the signal peptide. Procalcitonin-(60-116)-peptide represents calcitonin extended from its C-terminus by the sequence Gly-Lys-Lys-Arg-katacalcin, and its formation is indicative of an aberrant pathway of procalcitonin processing in the tumour cells.
Ganglioside agglutination immunoassay for rapid detection of autoantibodies in immune&hyphen;mediated neuropathy (2001)

Abstract Elevated levels of serum autoantibodies directed against gangliosides are closely associated with acute and chronic autoimmune neuropathies. An agglutination immunoassay using polystyrene microparticles coated with a total extract of brain gangliosides was used to test patient sera for the presence of anti&hyphen;ganglioside antibodies. Results were compared with those obtained by ELISA for anti&hyphen;GM1 and anti&hyphen;GQ1b ganglioside antibodies. Eight of the twelve sera from patients with multifocal motor neuropathy and seven of the thirteen sera from patients with Guillain&hyphen;Barr&eacute; syndrome were positive for the presence of anti&hyphen;ganglioside antibodies by the ganglioside agglutination immunoassay. The assay compared favorably with the ELISA system in sensitivity and specificity, while requiring a fraction of the time and cost to perform. The new assay can serve as a rapid and effective method for detecting or screening for anti&hyphen;ganglioside antibodies in patients with acute or chronic immune&hyphen;mediated neuropathies. It would be particularly useful for detecting antibodies that react with multiple gangliosides, or with minor or as yet uncharacterized gangliosides. J. Clin. Lab. Anal. 15:96&ndash;99, 2001. &copy; 2001 Wiley&hyphen;Liss, Inc.
Effects and modeling of simultaneous switching noise for BiCMOS off-chip drivers (1996)

A model of simultaneous switching noise (SSN) for the conventional BiCMOS driver including the influence of negative feedback is presented. Level 1 SPICE-type MOSFET and Gummel-Poon BJT device models are used for the analysis. The model accounts for a reduction in forward current gain, /spl beta//sub F/, that is attributed to high-level injection effects. Closed-form expressions are presented that predict the maximum SSN encountered in low-level and high-level injection. Solutions of the first equation are combined with the second in order to model the complete SSN transient. Model predictions are compared to SPICE simulation results for 5 V, 1 /spl mu/m drivers and 3.5 V, 0.5 /spl mu/m drivers with close agreement. The effects of BJT parasitic resistance, junction capacitance, and forward transit time on reducing induced ground noise are also explored. With the introduction of these parasitics, SPICE predictions of the maximum SSN are approximately 20% lower than closed-form model results. Immunity of the quiet BiCMOS driver to noise present at the ground and power connections is also investigated. It is found that the quiet driver is highly immune to adverse effects caused by SSN at the power connection and partially immune to SSN present at the ground. Coupling between ground noise and the output occurs when the ground noise is greater than two forward diode drops above ground, in which case the output tracks the ground noise with a negative offset of one diode drop.
Metasurface quantum-cascade laser with electrically switchable polarization (2017)

Dynamic control of a laser’s output polarization state is desirable for applications in polarization sensitive imaging, spectroscopy, and ellipsometry. Using external elements to control the polarization state is a common approach. Less common and more challenging is directly switching the polarization state of a laser, which, however, has the potential to provide high switching speeds, compactness, and power efficiency. Here, we demonstrate a new approach to achieve direct and electrically controlled polarization switching of a semiconductor laser. This is enabled by integrating a polarization-sensitive metasurface with a semiconductor gain medium to selectively amplify a cavity mode with the designed polarization state, therefore leading to an output in the designed polarization. Here, the demonstration is for a terahertz quantum-cascade laser, which exhibits electrically controlled switching between two linear polarizations separated by 80°, while maintaining an excellent beam with a narrow divergence of ~3°×3° and a single-mode operation fixed at ~3.4 THz, combined with a peak power as high as 93 mW at a temperature of 77 K. The polarization-sensitive metasurface is composed of two interleaved arrays of surface-emitting antennas, all of which are loaded with quantum-cascade gain materials. Each array is designed to resonantly interact with one specific polarization; when electrical bias is selectively applied to the gain material in one array, selective amplification of one polarization occurs. The amplifying metasurface is used along with an output coupler reflector to build a vertical-external-cavity surface-emitting laser whose output polarization state can be switched solely electrically. In conclusion, this work demonstrates the potential of exploiting amplifying polarization-sensitive metasurfaces to create lasers with desirable polarization states—a concept which is applicable beyond the terahertz and can potentially be applied to shorter wavelengths.
Der abbau von polyoxymethylenen. Poloxymethylene. 14. Mitteilung (1960)

Abstract Quantitative Untersuchungen über die Zersetzung von Polyoxymethylenen unter verschiedenen Bedingungen zeigen, daß im wesentlichen 5 Abbaureaktionen unterschieden werden können Depolymerisation vom Kettenende her, Autoxydative Spaltung, Abbau durch Sekundärprodukte der Autoxydation, Thermische Degradation, Hydrolyse und Acidolyse. Die einzelnen Reaktionen lassen sich experimentell getrennt untersuchen. Es werden Möglichkeiten angegeben, den Abbau zu unterdrücken. Eine Methode zur Prüfung der thermischen Stabilität von Polyoxymethylenen wird vorgeschlagen.
SOLID‐LIQUID PHASE EQUILIBRIA IN MULTICOMPONENT AQUEOUS SUGAR SOLUTIONS (1971)

SUMMARY A survey is made of the problem of predicting and correlating phase diagrams for multicomponent aqueous sugar solutions, starting from experimental data for aqueous solutions of single sugars. An evaluation of existing observations indicates that equilibrium cooling of quaternary solutions of d‐fructose, d‐glucose, sucrose and water will form a succession of four distinct solid phases. In an equilibrium situation each of these solid phases would begin to appear at the temperature where the residual liquid becomes saturated in that component. Ultimately a quaternary eutectic liquid of invariant and uniquely determined composition would remain and solidify at a unique temperature. This aquilibrium behavior represents the limit for actual situations where delayed crystallization can hamper attainment of equilibrium. A method is presented for predicting solid‐liquid equilibrium in multicomponent systems, notably fruit juices, through the use of ideal‐solution concepts for defining the order and extent to which solid phases appear and through the use of observed activity coefficients for obtaining the relationship between temperature and wt‐% dissolved solids. The method is illustrated in terms of the limiting thermodynamic equilibrium freezing behavior of fruit juices and predictions are compared with experimental data for fruit juices.
Inner ear auditory testing in patients with normal hearing showing hyperacusis (2009)

聴力正常の聴覚過敏患者24名 (男性8名, 女性16名) に対してSISI検査, MCL・UCL検査, 自記オージオメトリー検査, Metz検査を行い, リクルートメント現象の陽性率を検討した。17名 (71%) が, 聴力が正常であるにもかかわらず何らかの内耳機能検査で陽性であった。それぞれの検査の陽性率はSISI検査で27%, MCL・UCL検査で38%, 自記オージオメトリー検査で38%, Metz検査で33%であった。片側のみの聴覚過敏は9名 (37.5%), 両側の聴覚過敏は15名 (62.5%) であった。片側聴覚過敏の場合, 症状と陽性を示した検査側は必ずしも一致しなかった。
The dark side of employee email (1999)

article Free Access Share on The dark side of employee email Authors: Janice C. Sipior Villanova Univ., Villanova, PA Villanova Univ., Villanova, PAView Profile , Burke T. Ward Villanova Univ., Villanova, PA Villanova Univ., Villanova, PAView Profile Authors Info & Claims Communications of the ACMVolume 42Issue 7July 1999pp 88–95https://doi.org/10.1145/306549.306591Published:01 July 1999Publication History 16citation3,606DownloadsMetricsTotal Citations16Total Downloads3,606Last 12 Months93Last 6 weeks13 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteView all FormatsPDF
Identification of Volatile and Powerful Odorous Thiols in Bordeaux Red Wine Varieties (1998)

The use of a new technique combining low-temperature vacuum distillation with a specific chemical capture with an organomercuric compound enabled the extraction of volatile odorous thiols present at very low concentrations in the Bordeaux red wine varieties Merlot and Cabernet Sauvignon. The analysis of wine extracts by gas chromatography coupled with detection by olfactometry, flame photometry, and mass spectrometry led to the identification of three aromatic thiols: 3-mercapto-2-methylpropanol, identified for the first time in wine; 3-mercaptohexanol; and 3-mercaptohexyl acetate, already described in Sauvignon Blanc wines. Keywords: Vacuum distillation; p-hydroxymercuribenzoate; aroma; 3-mercapto-2-methylpropanol; 3-mercaptohexanol; 3-mercaptohexyl acetate; Bordeaux red wines; Cabernet Sauvignon; Merlot
PCR analysis of the Y chromosome long arm in azoospermic patients: evidence for a second locus required for spermatogenesis (1994)

We analyzed DNA from 63 Japanese men with either azoospermia or severe oligospermia whose Y chromosomes were cytogenetically normal. A total of 16 loci were examined: 15 loci on the long arm between DYS7E and DYZ1, and the YRRM1 locus, a candidate gene for the azoospermic factor, AZF. One patient with a pericentric inversion of the Y chromosome was also included. We detected micro-deletions in ten individuals. The YRRM1 gene was involved in only three of them. The remaining seven patients showed deletion between DYS7C and DYS239 in common, indicating the presence of at least one additional gene, deletion of which causes azoospermia.
Partial Regeneration of Ni-Based Catalysts for Hydrogen Production via Methane Cracking (2008)

Methane cracking has the potential to produce high purity, carbon monoxide-free hydrogen suitable for application in PEM fuel cells. The 2 products of the reaction are molecular hydrogen and solid carbon. The carbon appears in the form of carbon filaments whose growth is hindered by carbon encapsulation leading to total deactivation of the catalyst. Several attempts have been made to regenerate the catalyst, mainly by gasifying the carbon filament in air or steam. Our work on 5-wt% Ni/g-Al2O3 indicated that after complete gasification of the carbon the catalyst lost nearly all its activity toward methane cracking. However, if the gasification proceeds to only a certain extent, it is possible to recover significant activity of the catalyst. This technique, also known as partial regeneration, is a promising strategy to overcome the challenge of catalyst deactivation in catalytic decomposition of methane. Optimization of the partial regeneration method is presented here, in particular the extent to which the gasification should take place. Activity of the catalyst and the extent of gasification have been monitored through thermogravimetric analysis. Regeneration of catalyst is still a much-questioned field to maintain not only a continuous and also an economical process. That is why this experimental study focused on regeneration of nickel supported on alumina. As an overview of this study: The effects of percentage of nickel, application of reduction, reaction temperature, and the amount of gasified carbon on weight gain are stated as the rate of carbon formation per gram of nickel present in catalyst.
Nanometric Surface Metrology at the National Physical Laboratory (1991)

A theoretical framework for mapping the performance of measuring instruments has been developed that is used to interpret the results of measurements at the nanometric level, where it is particularly important to understand the geometrical and physical interactions between the measuring instrument and the object being measured. Nanometric topographic measuring instruments that have been developed at the NPL span measuring ranges of 0,01 nm to 3 nm in surface amplitude and 0,3 nm to 100 nm in surface wavelength.
THE CAUSATION OF ORGANIC REACTIONS BY ALUMINA, AND THEORIES OF CATALYSIS (1924)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE CAUSATION OF ORGANIC REACTIONS BY ALUMINA, AND THEORIES OF CATALYSISHomer Adkins and Brynjulv H. NissenCite this: J. Am. Chem. Soc. 1924, 46, 1, 130–145Publication Date (Print):January 1, 1924Publication History Published online1 May 2002Published inissue 1 January 1924https://pubs.acs.org/doi/10.1021/ja01666a018https://doi.org/10.1021/ja01666a018research-articleACS PublicationsRequest reuse permissionsArticle Views130Altmetric-Citations10LEARN 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
Pre-Steady-State Kinetic Studies of the Fidelity of Human DNA Polymerase μ (2004)

DNA polymerase mu (Polmu), an X-family DNA polymerase, is preferentially expressed in secondary lymphoid tissues with yet unknown physiological functions. In this study, Polmu was overexpressed in Escherichia coli and purified to homogeneity. The purified enzyme had a lifetime of <20 min at 37 degrees C, but was stable for over 3 h at 25 degrees C in an optimized reaction buffer. The fidelity of human Polmu was thus determined using pre-steady-state kinetic analysis of the incorporation of single nucleotides into undamaged DNA 21/41-mer substrates at 25 degrees C. Single-turnover saturation kinetics for all 16 possible deoxynucleotide (dNTP) incorporations and for four matched ribonucleotide (rNTP) incorporations were measured under conditions where Polmu was in molar excess over DNA. The polymerization rate (k(p)), binding affinity (K(d)), and substrate specificity (k(p)/K(d)) are 0.006-0.076 s(-1), 0.35-1.8 microM, and (8-64) x10(-3) microM(-1) s(-1), respectively, for matched incoming dNTPs, (2-30) x 10(-5) s(-1), 7.3-135 microM, and (4-61) x 10(-7) microM(-1) s(-1), respectively, for mismatched incoming dNTPs, and (2-73) x 10(-4) s(-1), 45-302 microM, and (7-1300) x 10(-7) microM(-1) s(-1), respectively, for matched incoming rNTPs. The overall fidelity of Polmu was estimated to be in the range of 10(-3)-10(-5) for both dNTP and rNTP incorporations and was sequence-independent. The sugar selectivity, defined as the substrate specificity ratio of a matched dNTP versus a matched rNTP, was measured to be in the range of 492-10959. In addition to a slow and distributive DNA polymerase activity, Polmu was identified to possess a weak strand-displacement activity. The potential biological roles of Polmu are discussed.
Using Zero Moment Point preview control formulation to generate nonlinear trajectories of walking patterns on humanoid robots (2015)

Generating nonlinear trajectories of walking patterns is one of the most important problems in stability a humanoid robot when it walks on different ground conditions. In order to solve this problem, a desired Zero Moment Point (ZMP) trajectory is firstly designed and then a Center of Mass (CoM) trajectory will be created based on this ZMP. Hence, the preview control formulation which follows the planned ZMP patterns while reducing the jerk (acceleration derivation) is considered to implement this trajectory. In this study, the walking pattern for bipedal robot is generated by using a cart-table model. The procedure of apply a preview controller to the cart-table model will be presented in this investigation. After that, the position of each leg joint of bipedal robot is also calculated by using the proposed CoM Jacobian. Finally, computer simulations are performed by utilizing RecurDyn and MATLAB softwares to validate the proposed preview control formulation for the nonlinear walking patterns generation of a Bioloid humanoid robot.