gebhart/patrepeval huggingface dataset:
A bandwidth enhancement method for microstrip antennas (1987)

Bandwidth enhancement methods for electromagnetically coupled microstrip dipoles are discussed. It is demonstrated that if parasitic metallic strips are incorporated in the structure either co-planar and parallel to the embedded microstrip transmission line open end, or between the transmission line and the microstrip dipole, then substantial bandwidth enhancement results. Experimental verification of this model is introduced for a bandwidth definition based on the frequency range which satisfies a voltage standing-wave ratio (VSWR) < 2 criterion. Also, experimental <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\bar{E}</tex> - and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\bar{H}</tex> -plane patterns verify the theoretical model which accounts for radiation from the microstrip dipole, the parasitics, and the transmission line.
POTENTIATION OF T-CELL-MEDIATED IMMUNITY BY SELECTIVE SUPPRESSION OF ANTIBODY FORMATION WITH CYCLOPHOSPHAMIDE (1974)

Delayed-type hypersensitivity (DTH) appears in mice immunized with less than an optimal immunogenic dose of sheep red blood cells (SRBC), but is blocked progressively as antibody production increases in response to larger doses of SRBC. Treatment with cyclophosphamide (CY) was shown to release T cells from this inhibitory influence of the humoral response, and cause enhancement of DTH. The magnitude of this enhancing effect on T-cell activity was markedly dependent on the time of treatment relative to the time of immunization, and on the time chosen for measuring DTH. The reasons for these pronounced effects of timing are threefold: (a) CY given before antigenic stimulation has a long-lasting effect on antibody formation, but no apparent effect on the precursors of activated T cells. (b) After antigenic stimulation, T cells also become susceptible to CY. (c) The production of a nonspecific participant (monocyte) in the DTH reaction is also suppressed by CY, though the supply of circulating monocytes is not immediately affected by the drug. The differential effect of CY on T and B lymphocytes depends on the differing physiological states of the majority of cells that make up these two populations. The former are resting cells that are insensitive to CY until exposed to specific antigen, while the latter are drawn from a rapidly replicating precursor pool and are susceptible to CY at all times.
Draft Genome Sequences of <i>Campylobacterales</i> ( <i>Epsilonproteobacteria</i> ) Obtained from Methanogenic Oil Sands Tailings Pond Metagenomes (2014)

Draft genome sequences of two Campylobacterales (Sulfurospirillum sp. strain SCADC and Sulfuricurvum sp. strain MLSB [Mildred Lake Settling Basin]) were obtained by taxonomic binning of metagenomes originating from an oil sands tailings pond. Both genomes contain soxABXYZ genes involved in sulfur oxidation, highlighting their potential roles in sulfur cycling in oil sands tailings ponds.
Gunn effect with two samples in parallel (1968)

The current waveform of two long Gunn oscillators in parallel in a transmission line is described and is extended to include the effect of putting a resistor in series.
Expansion of growth substrate range in Pseudomonas putida F1 by mutations in both cymR and todS, which recruit a ring-fission hydrolase CmtE and induce the tod catabolic operon, respectively (2003)

Pseudomonas putida F1 can assimilate benzene, toluene and ethylbenzene using the toluene degradation pathway, and can also utilize p-cymene via p-cumate using the p-cymene and p-cumate catabolic pathways. In the present study, P. putida F1 strains were isolated that were adapted to assimilate new substrates such as n-propylbenzene, n-butylbenzene, cumene and biphenyl, and the molecular mechanisms of genetic adaptation to an expanded range of aromatic hydrocarbons were determined. Nucleotide sequence analyses showed that the selected strains have mutations in the cymR gene but not in todF gene. The impairment of the repressor CymR by mutation led to the constitutive expression of CmtE, a meta-cleavage product hydrolase from the cmt operon. This study also showed that CmtE has a broad range of substrates and can hydrolyse meta-cleavage products formed from biphenyl and other new growth substrates via the toluene degradation pathway. However, the artificially constructed strain P. putida F1(cymR : : Tc(r)) and a recombinant P. putida F1, which expressed CmtE constitutively, could not grow on the new substrates. The adapted strains possess the tod operon, which is induced by new growth substrates that are poor inducers of wild-type P. putida F1. When the todS gene from the adapted strains was introduced in a trans manner to P. putida F1(cymR : : Tc(r)), the resulting recombinant strains were able to grow on biphenyl and other new substrates. This finding indicates that the TodS sensor was altered to recognize these substrates and this conclusion was confirmed by nucleotide sequence analyses. Amino acid substitutions were found in the regions corresponding to the receiver domain and the second PAS domain and their boundaries in the TodS protein. These results showed that P. putida F1 adapted strains capable of growth on n-propylbenzene, n-butylbenzene, cumene and biphenyl possess mutations to employ CmtE and to induce the tod catabolic operon by the new growth substrates.
Spontaneous Production of Monocyte Chemoattractant Protein-1 and Interleukin-8 by the Human Lumbar Intervertebral Disc (2002)

Human intervertebral disc tissue is capable of spontaneously producing the proinflammatory chemokines monocyte chemoattractant protein-1 and interleukin-8. These are chemotactic for macrophages and capillaries and may explain the ingrowth of granulation tissue seen in spontaneous disc herniation resorption.
Current state-of-the-art and future prospects for power semiconductor devices in power transmission and distribution applications (2003)

Abstract Since the first commercially viable thyristors appeared in the early 1960s, there has been a dramatic increase in the switched power ratings and versatility of high-voltage power semiconductor devices. By the mid 1970s, thyristors with switched power ratings of several MVA were being applied in high voltage dc transmission systems and static VAr compensators. The introduction, in the 1980s, of controlled turn-off devices, such as the gate turn-off thyristor (GTO) and insulated gate bipolar transistor (IGBT), broadened the application of high-voltage power devices to hard-switched converters and, by the start of the 21st century, controllable silicon power devices were available with voltage ratings of 12 kV and switched power capabilities of up to 40 MVA. A review of the current state-of-the-art in silicon high-voltage power semiconductor technology covers gate-commutated thyristors (GCT, IGCT) and IGBT devices, including the injection-enhanced IGBT or IEGT. Despite these considerable achievements, there is now mounting evidence that silicon-based power semiconductors are reaching their limit, both in terms of voltage rating and of switched power capability. The introduction of wide-band-gap semiconductor materials such as silicon carbide offers the potential to break through the voltage-switching frequency limitations of silicon, with power-switching frequency products more than two orders of magnitude higher. An analysis of the current status and future prospects for silicon carbide power electronic devices is presented, together with a case study comparing a variety of silicon and silicon carbide solutions in a 10 kV hard-switched converter application. It is shown that an all-silicon carbide switch offers the best electrical performance and lowest cost solution, in spite of higher per unit area device costs.
Curvelet-based seismic data processing: A multiscale and nonlinear approach (2007)

Abstract Mitigating missing data, multiples, and erroneous migration amplitudes are key factors that determine image quality. Curvelets, little “plane waves,” complete with oscillations in one direction and smoothness in the other directions, sparsify a property we leverage explicitly with sparsity promotion. With this principle, we recover seismic data with high fidelity from a small subset (20%) of randomly selected traces. Similarly, sparsity leads to a natural decorrelation and hence to a robust curvelet-domain primary-multiple separation for North Sea data. Finally, sparsity helps to recover migration amplitudes from noisy data. With these examples, we show that exploiting the curvelet's ability to sparsify wavefrontlike features is powerful, and our results are a clear indication of the broad applicability of this transform to exploration seismology.
Teaching with a Purpose in Mind: Cultivating a Vision. (2013)

Across the nation, educators continue to face challenges as they work to individualize instruction to meet the specific needs of their students. However, theory suggests that teachers who possess a clear vision for teaching creatively weave their personal convictions for teaching with instructional practices. Drawing upon a teacher’s (first author) account of her vision and the classroom literacy practices structured over the course of one year, a practical approach is taken to address teacher visioning as a way to sustain teachers’ creativity despite the pressures associated with teaching in today’s educational climate.
Synthesis, structure, spectroscopic properties, and hydrolytic chemistry of organophosphonoyl polyoxotungstates of formula [C6H5P(O)]2Xn+W11O39(8-n)- (Xn+ = P5+, Si4+) (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, spectroscopic properties, and hydrolytic chemistry of organophosphonoyl polyoxotungstates of formula [C6H5P(O)]2Xn+W11O39(8-n)- (Xn+ = P5+, Si4+)Gyu Shik Kim, Karl S. Hagen, and Craig L. HillCite this: Inorg. Chem. 1992, 31, 25, 5316–5324Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/doi/10.1021/ic00051a025https://doi.org/10.1021/ic00051a025research-articleACS PublicationsRequest reuse permissionsArticle Views798Altmetric-Citations72LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Three-Dimensional Acoustic Travel-Time Tomography of the Atmosphere (2008)

Acoustic travel-time tomography is a remote technique that can be used for reconstruction of temperature and wind velocity fields in the atmosphere. In the literature, results of two-dimensional tomography of the atmosphere have been reported so far. This paper presents an algorithm for reconstruction of temperature and wind velocity fields in three-dimensional tomography. In the algorithm, stratification of the atmosphere is taken into account explicitly. This allows high accurate reconstruction of stratified mean temperature and wind velocity fields. The fields of fluctuations are reconstructed with the use of three-dimensional time-dependent stochastic inversion. Estimation of the errors of reconstruction is also presented. A numerical experiment with large-eddy simulation is used to confirm the efficiency of the developed theory.
Mutational Analysis of the Catalytic Domain of O-Linked N-Acetylglucosaminyl Transferase (2005)

O-Linked N-acetylglucosaminyltransferase (OGT) catalyzes the transfer of O-linked GlcNAc to serine/threonine residues of a variety of target proteins, many of which have been implicated in such diseases as diabetes and neurodegeneration. The addition of O-GlcNAc to proteins occurs in response to fluctuations in cellular concentrations of UDP-GlcNAc, which result from nutrients entering the hexosamine biosynthetic pathway. However, the molecular mechanisms involved in sugar nucleotide recognition and transfer to protein are poorly understood. We employed site-directed mutagenesis to target potentially important amino acid residues within the two conserved catalytic domains of OGT (CD I and CD II), followed by an in vitro glycosylation assay to evaluate N-acetylglucosaminyltransferase activity after bacterial expression. Although many of the amino acid substitutions caused inactivation of the enzyme, we identified three amino acid residues (two in CD I and one in CD II) that produced viable enzymes when mutated. Structure-based homology modeling revealed that these permissive mutants may be either in or near the sugar nucleotide-binding site. Our findings suggest a model in which the two conserved regions of the catalytic domain, CD I and CD II, contribute to the formation of a UDP-GlcNAc-binding pocket that catalyzes the transfer of O-GlcNAc to substrate proteins. Identification of viable OGT mutants may facilitate examination of its role in nutrient sensing and signal transduction cascades.
Recent advances in the pathogenesis and clinical evaluation of pulmonary fibrosis (2012)

Interstitial lung diseases (ILDs) are a group of heterogeneous disorders, either idiopathic or associated with injurious or inflammatory causes, in which the major site of damage is the lung interstitium. For a long time, knowledge regarding pathogenesis was trivial and there were difficulties in diagnosing and subsequently treating these diseases. During the past decade, however, there has been an impressive development in the field of ILDs. Idiopathic pulmonary fibrosis, the most common and fatal form of ILD, was initially believed to be due to an inflammatory response to unknown lung injury, whereas nowadays it is believed to be the result of multiple injuries at different sites of the lung followed by aberrant repair. The integration of clinical, radiological and histological data, namely a multidisciplinary team (MDT) approach, has provided grounds for a more accurate diagnosis of ILDs, and helped the identification of different entities and development of different therapeutic approaches. However, because of the complexity of ILDs, even this approach may fail to establish a confident diagnosis. How should the clinician behave in this case and what are the pitfalls of the MDT approach? In addition, since diagnosis is the major predictor of prognosis, are there any other tools available to predict prognosis?
Effects of <i>Moringa</i> based Feed Additives on the Growth Performance and Carcass Quality of Broiler Chicken (2015)

The effects of selected herbal dietary supplements on the growth performance and carcass quality of broiler chicken were investigated. Three hundred and eight day-old, male broiler chicks of Indian River strain were randomly allotted to seven experimental diets namely negative control, 0.0125% flavomycin (positive control), 0.1% Moringa leaf powder (MLP), 0.05% Moringa leaf powder, 0.035% Zigbir (commercial herbal product), 0.1% Moringa fruit powder (MFP) and 0.05% Moringa fruit powder, in a complete randomized design. Each treatment contained 44 birds with four replicates of 11birds each. The body weights and feed consumption was recorded at weekly intervals. Body weight gains and feed conversion ratio (FCR) were calculated. On 42nd day birds were slaughtered and the weight after bleeding, weight after defeathering, total organ weight and dressed weight of individual birds were measured. The carcass quality parameters such as abdominal (fat around gizzard, vent and heart) and subcutaneous (neck, breast and leg) fat contents of five samples from each replicate were determined. The study revealed that all selected herbal dietary supplements significantly (P<0.05) improved the growth performance and carcass yield of broiler chicken compared to the negative control. Among the herbal feed additives, the commercial herbal product Zigbir was the most effective in improving the growth performance of broiler chicken. Moringa fruit powder of 0.1% increased the gizzard fat content while 0.1% Moringa leaf powder reduced the same. This study revealed that replacing antibiotic growth promoters with herbal supplements has beneficial effects on the growth performance and carcass yield of broiler chicken.Tropical Agricultural Research Vol. 24(1): 12-20(2012)DOI: http://dx.doi.org/10.4038/tar.v24i1.7985
Dynamic Scheduling of a Multiclass Fluid Network (1993)

A fluid network is a deterministic network model in which dynamic continuous flows are circulated and processed among a set of stations. A fluid network often describes the asymptotic behavior of a stochastic queueing network via functional strong law of large numbers. We study the dynamic scheduling of multiple classes of fluid traffic in such a network. An algorithm is developed that systematically solves the dynamic scheduling problem by solving a sequence of linear programs. It generates a policy, in the form of dynamic capacity allocation at each station (among all fluid classes), that consists of a finite set of linear “pieces” over the entire time horizon. In a single-station, or equivalently, single-server, network, this solution procedure recovers the priority index set that is optimal for the corresponding discrete queueing model, generally known as Klimov's problem.
Sensors to Support the Soldier (2005)

Abstract : The charge, which was proposed by JASON itself and approved by Dr. Steve Lubard (Technical Director, ST location, navigation, and maps; sensing through walls; countering snipers; and uses for UAVs. We will now summarize our principal findings and conclusions in each of these areas.
Method and apparatus for automatically terminating uncontrolled flow of well fluids from a subsurface formation. [storage wells] (1974)

A self-contained, automatic value assembly is designed to be anchored at a subsurface location within a well conduit which extends into a subterranean formation employed as a reservoir to store pressurized natural gas. The valve is preferably supported by a retrievable packer which anchors the valve within the conduit and forms a seal to force gas flowing in the conduit to flow through the valve. Operation of the valve is governed by a pressure charged dome control which acts through a bellows to move a valve stem to the closed position to terminate flow through the valve when the flowing well presure drops by a predetermined amount relative to the dome pressure. Compensating means included in the dome control permit the value of the flowing well pressure required to close the valve to be raised or lowered by controlling the pressure at the wellhead. During gas injection or gas removal, the valve functions as a safety device and closes automatically to terminate well flow any time the flowing well pressure drops below the dome control pressure by an established value. (16 claims)
Theory and Practice of Geophone Calibration In Situ Using a Modified Step Method (1977)

The transfer function of a moving coil electromagnetic geophone requires up to six constants: the suspended mass, the natural resonant frequency, the mechanical and the electrical damping factors, the inductive time constant of the coil-damping resistance circuit, and the coil transductance. If the mass is known, the remaining constants may be satisfactorily determined by displacing the mass with a known dc current, and observing the time varying output potential on removal of the steady current. The techniques outlined are suited to in situ calibration, and have a minimum equipment requirement of a CRO and a small battery. Improved accuracy is possible using a precision signal generator and a quality CRO, if the geophone natural and upper resonant frequencies are measured by the phase ellipse method. Calibration is possible for both under- and over-damped systems, using either the derived formulas or accompanying graphs. The accuracy attainable is dependent on the geophone damping and frequency range of operation, but is typically 2 percent in absolute amplitude and 2° in phase for 0.7 critical damping.
Workshop report on the extraction of foetal DNA from maternal plasma (2007)

This workshop initiated a standardization process for extraction of cff DNA in maternal plasma. The highest yield was obtained by the QIAamp DSP Virus Kit, a result that will be evaluated in more detail in future studies.
Defective TGF-β Signaling in Bone Marrow–Derived Cells Prevents Hedgehog-Induced Skin Tumors (2013)

Hedgehog signaling in cancer cells drives changes in the tumor microenvironment that are incompletely understood. Here, we report that hedgehog-driven tumors exhibit an increase in myeloid-derived suppressor cells (MDSC) and a decrease in T cells, indicative of an immunosuppressive tumor microenvironment. This change was associated with activated TGF-β signaling in several cell types in basal cell carcinomas. We determined that TGF-β signaling in bone marrow-derived cells, not keratinocytes, regulates MDSC and promotes tumor development. Tgfbr2 deficiency in the bone marrow-derived cells also reduced the size of previously developed tumors in mice. We identified CCL2 as the major chemokine attracting MDSCs to tumor, whose expression was Tgfbr2-dependent, whereas its receptor CCR2 was highly expressed in MDSC population. CCL2 alone was sufficient to induce migration of MDSCs. Moreover, the CCR2 inhibitors prevented MDSC migration toward skin cells in vitro, and reduced MDSC accumulation and hedgehog signaling-driven tumor development in mice. Our results reveal a signaling network critical for hedgehog signaling in cancer cells to establish an effective immunosuppressive microenvironment during tumor development.
Plant Regeneration and Callus Type in Barley: Effects of Genotype and Culture Medium (1992)

To facilitate practical application of in vitro genetic manipulation to barley ( Hordeum vulgare L.), methods for the in vitro culture of barley must be improved. Fifteen genotypes of barley, primarily cultivars or elite breeding lines adapted to North America, were examined for their ability to form regenerable callus from immature embryos on modified versions of MS, B5, and CC media. Regenerable calli were obtained from all genotypes. The frequency of embryogenic callus induction, the morphology and friability of embryogenic calli, the relative growth rate of embryogenic calli, and regenerability were influenced by genotype, culture medium, and genotype × culture medium interactions. Callus cultures that were embryogenic in appearance frequently were not regenerable, or regenerated only albino plantlets. The majority of green plants grown to maturity were fertile and normal in appearance. Genotype was the most important determinant of the in vitro response. Regenerability was transient for all genotypes, with few exceptions. The best in vitro performance, based on ability to form friable, regenerable callus, was observed for ‘Golden Promise’, ‘Hector’, ‘Piroline’, and ‘Klages’.