gebhart/patrepeval huggingface dataset:
MR fingerprinting using fast imaging with steady state precession (FISP) with spiral readout (2014)

MRF-FISP enables a fast and accurate quantification of the relaxation parameters. It is immune to the banding artifact of bSSFP due to B0 inhomogeneities, which could improve the ability to use MRF for applications beyond brain imaging.
Soft-switching single-stage power factor correction converter (2002)

A single-stage, ZVT-PWM, power factor correction converter is proposed in this paper. Zero-voltage switching for the main switch and zero-current switching for the auxiliary switch are realized by utilizing the leakage inductance of the output transformer and the capacitance of the switches. As a result, no additional resonant components need to be added. ZVS operation is realized for a wide range of load and line. High frequency operation of the proposed converter makes the AC-DC power supply possible to be minimized in size and weight and the soft switching scheme reduces the electromagnetic interference (EMI). The proposed converter uses a grounded auxiliary switch so that the isolated driving circuit is not required. The simplified driving circuitry again improves the overall efficiency and power density. Practically, the direct driving schemes of both the main and the auxiliary switches allows the proposed converter to operate in even high switching frequency and have good regulation capability. A 50-W 500-kHz prototype has been built in the laboratory to experimentally verify the analysis and simulation results.
Thiophene Polymer Semiconductors for Organic Thin‐Film Transistors (2008)

Printed organic thin-film transistors (OTFTs) have received great interests as potentially low-cost alternative to silicon technology for application in large-area, flexible, and ultra-low-cost electronics. One of the critical materials for TFTs is semiconductor, which has a dominant impact on the transistor properties. We review here the structural studies and design of thiophene-based polymer semiconductors with respect to solution processability, ambient stability, molecular self-organization, and field-effect transistor properties for OTFT applications. We show that through judicial monomer design, delicately controlled pi-conjugation, and strategically positioned pendant side-chain distribution, novel solution-processable thiophene polymer semiconductors with excellent self-organization ability to form extended lamellar pi-stacking orders can be developed. OTFTs using semiconductors of this nature processed in ambient conditions have provided excellent field-effect transistor properties.
Urine TIMP2 × IGFBP7 increases 24 hours before severe AKI (2014)

We recently reported a 728-patient multicenter study (Sapphire) where a biomarker combination of tissue inhibitor of metalloproteinases-2 (TIMP-2) and insulin-like growth factor binding protein 7 (IGFBP7) were validated for risk stratification for moderate or severe acute kidney injury (AKI) KDIGO stage 2 and 3 [1].
Corneodesmosin gene: no evidence for PSORS 1 gene in North‐eastern Thai psoriasis patients (2003)

Psoriasis vulgaris, a common inflammatory skin disorder, is known to be associated with the HLA-Cw*06 allele. It has been recently suggested by microsatellite mapping that a real susceptible gene for psoriasis resides in the approximately 100-kb genomic region telomeric of the HLA-C gene. In this respect, the corneodesmosin (CDSN) gene 160-kb telomeric of HLA-C is a strong candidate because of its location and its functional role in corneocyte cohesion and desquamation. In fact, a significant association between CDSN polymorphism and psoriasis was recently recognized in Caucasian populations. However, this association has not been replicated in other studies, being still controversial. In this study, we investigated the genetic polymorphism of the CDSN gene in 139 psoriasis patients and 144 healthy controls in the North-eastern Thai population. By direct sequencing technique, a total of 28 polymorphic sites were found, consisting of 26 single nucleotide polymorphisms (SNPs) and two indels (insertion/deletion). Among them, six SNPs have not been previously reported. Through this analysis, as many as 28 different SNP/indel haplotypes within the CDSN gene were identified. Seven SNPs and one indel, namely 9C, 614 A, 722T, 971T, 1215G, 1243C, 1331G and 1606AAG (deletion), revealed significant deviation in the allelic frequencies of the patients from those of the healthy controls. However, none of them are likely to be responsible for controlling the susceptibility of psoriasis, but these associations can be explained by a linkage disequilibrium to a real pathogenic allele of a nearby gene. Further, the large variations between the CDSN SNP/indel haplotypes and the psoriatic major histocompatibility complex (MHC) haplotypes also make it unlikely that CDSN is a major psoriasis-susceptible gene.
Conditions for Long-Term Culture of Cattle Undifferentiated Spermatogonia (2016)

Continual and robust spermatogenesis relies on the actions of an undifferentiated spermatogonial population that contains stem cells. A remarkable feature of spermatogonial stem cells (SSCs) is the capacity to regenerate spermatogenesis following isolation from a donor testis and transplantation into a permissive recipient testis. This capacity has enormous potential as a tool for enhancing the reproductive capacity of livestock, which can improve production efficiency. Because SSCs are a rare subset of the undifferentiated spermatogonial population, a period of in vitro amplification in number following isolation from donor testicular tissue is essential. Here, we describe methodology for isolation of a cell fraction from prepubertal bull testes that is enriched for undifferentiated spermatogonia and long-term maintenance of the cells in both the feeder cell coculture and the feeder-free format. To achieve this method, we derived bovine fetal fibroblasts (BFF) to serve as feeders for optimizing medium conditions that promote maintenance of bovine undifferentiated spermatogonia for at least 2 mo. In addition, we devised a feeder-free system with BFF-conditioned medium that sustained bovine undifferentiated spermatogonia for at least 1 mo in vitro. The methodologies described could be optimized to provide platforms for exponential expansion of bovine SSCs that will provide the numbers needed for transplantation into recipient testes.
Highly sensitive and selective hydrogen single-nanowire nanosensor (2012)

Metal oxides such as ZnO have been used as hydrogen sensors for a number of years. Through doping, the gas response of zinc oxide to hydrogen has been improved. Cadmium-doped ZnO nanowires (NWs) with high aspect ratio have been grown by electrodeposition. Single doped ZnO NWs have been isolated and contacted to form a nanodevice. Such nanosystem demonstrates an enhanced gas response and selectivity for the detection of hydrogen at room temperature compared to previously reported H2 nanosensors based on pure single-ZnO NWs or multiple NWs. A dependence of the gas response of a single Cd–ZnO nanowire on the NW diameter and Cd content was observed. It is shown that cadmium-doping in single-crystal zinc oxide NWs can be used to optimize their response to gases without the requirement of external heaters. The sensing mechanisms responsible for such improved response to hydrogen are discussed.
Solvent controlled synthesis of new hematite superstructures with large coercive values (2012)

Various morphologies of hematite (α-Fe2O3) superstructures such as grape, cube, dumbbell, and microsphere shapes have been reproducibly obtained by a caffeine-assisted environmentally benign one-step hydrothermal synthesis route in the presence of different solvents. The hematite superstructures are formed by self-assembled aggregation of smaller particles of a few nanometres. It is demonstrated that systematic control over the studied experimental conditions (caffeine, solvents, concentration, reaction time, etc.) efficiently alters the structural and magnetic properties of the iron oxide nanostructures. In particular, the solvent plays a key role for overall architecture of the oxide particles under different polar conditions. Magnetic hysteresis measurements reveal that the shape of nanostructures has a remarkable effect on the magnetic properties at room temperature. Interestingly, the coercive values are much higher at room temperature than those at lower temperature for the α-Fe2O3 superstructures prepared in this work.
Wave-coupled LiNbO/sub 3/ electrooptic modulator for microwave and millimeter-wave modulation (1991)

A new technique of phase velocity matching in electrooptic modulators was demonstrated. The results show that the phase velocity mismatch due to material dispersion in traveling-wave LiNbO/sub 3/ optical waveguide modulators can be greatly reduced by breaking the modulation transmission line into short segments and connecting each segment to its own surface dipole antenna. The array of antennas is then illuminated by the modulation signal from below at the proper angle to produce a delay from antenna to antenna that matches the optical waveguide's delay. A phase modulator 25 mm in length with five antennas and five transmission line segments was operated from 4.6 to 13 GHz with a maximum phase modulation sensitivity of over 100 degrees /W/sup 1/2/.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Novel synthesis of sulfonimidoyl halides and sulfonimidates from N-silylated sulfonamides and dihalophosphoranes (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel synthesis of sulfonimidoyl halides and sulfonimidates from N-silylated sulfonamides and dihalophosphoranesAroop K. RoyCite this: J. Am. Chem. Soc. 1993, 115, 7, 2598–2603Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs.org/doi/10.1021/ja00060a008https://doi.org/10.1021/ja00060a008research-articleACS PublicationsRequest reuse permissionsArticle Views1256Altmetric-Citations27LEARN 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
The Labelling of Galactose Residues in Hepatitis B Surface Antigen Glycoprotein (1978)

The 20 to 25 nm particles of hepatitis B surface antigen were purified from the serum of a carrier chimpanzee. Five major polypeptide species were revealed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. Treatment of the particles with neuraminidase (EC 3.2.1.18) and galactose oxidase (EC 1.1.3.9) followed by reduction with tritiated sodium borohydride labelled galactose residues in a single glycoprotein with an apparent mol. wt. of 28 000. The glycoprotein was not labelled when neuraminidase treatment was omitted, indicating that the galactose residues are in subterminal positions in the oligosaccharide chains. There was no significant incorporation of radiolabel into lipid. The serological activity of the antigen, as measured by a competitive double-antibody radioimmunoprecipitation assay, was not altered by the labelling procedure nor by exposure to neuraminidase alone.
A new feature front based stereo correspondence technique (2009)

There is a continual need for faster and accurate stereo vision algorithms. While scan-line based algorithms are fast they are less accurate and algorithms based on probabilistic models are accurate but more time consuming. In this work, a new scan-line based algorithm that defines feature fronts according to the level set method is introduced. The feature fronts are matched using a new matching criterion that also compares the feature strengths in addition to an end-point SAD score. Feature fronts are sorted based on their strengths and strongest fronts are matched first. The algorithm seeks to identify visible fronts where a front is defined to be visible if it turns out to be its match's match. Continuity of feature fronts is imposed by requiring neighboring feature fronts in one image match to neighboring feature fronts in the other image or to no front.
Moving target indication with non-linear radar (2015)

A new approach for detecting a particular class of moving targets is presented. This method exploits characteristics of specific non-linear targets to both eliminate moving objects that are not of interest and suppress stationary clutter. Details of the underlying physical phenomena are discussed, and the signal processing procedures leveraged by the non-linear radar system are outlined in detail.
Error Resilient Video Coding Techniques Using Spare Pictures (2003)

Huntington disease (HD) is an autosomal dominant degenerative disorder caused by an expanded and unstable trinucleotide repeat (CAG)n in a gene (IT-15) on chromosome 4. HD exhibits genetic anticipation--earlier onset in successive generations within a pedigree. From a population-based clinical sample, we ascertained parent-offspring pairs with expanded alleles, to examine the intergenerational behavior of the trinucleotide repeat and its relationship to anticipation. We find that the change in repeat length with paternal transmission is significantly correlated with the change in age at onset between the father and offspring. When expanded triplet repeats of affected parents are separated by median repeat length, we find that the longer paternal and maternal repeats are both more unstable on transmission. However, unlike in paternal transmission, in which longer expanded repeats display greater net expansion than do shorter expanded repeats, in maternal transmission there is no mean change in repeat length for either longer or shorter expanded repeats. We also confirmed the inverse relationship between repeat length and age at onset, the higher frequency of juvenile-onset cases arising from paternal transmission, anticipation as a phenomenon of paternal transmission, and greater expansion of the trinucleotide repeat with paternal transmission. Stepwise multiple regression indicates that, in addition to repeat length of offspring, age at onset of affected parent and sex of affected parent contribute significantly to the variance in age at onset of the offspring. Thus, in addition to triplet repeat length, other factors, which could act as environmental factors, genetic factors, or both, contribute to age at onset. Our data establish that further expansion of paternal repeats within the affected range provides a biological basis of anticipation in HD.
Carbon−Proton Chemical Shift Correlation in Solid-State NMR by Through-Bond Multiple-Quantum Spectroscopy (1998)

A new two-dimensional NMR carbon-proton chemical shift correlation experiment, the MAS-J-HMQC experiment, is proposed for natural abundance rotating solids. The magnetization transfer used to obtain the correlations is based on scaler heteronuclear J couplings. The 2D map provides through-bend chemical shift correlations between directly bonded proton-carbon pairs in a way similar to that in corresponding high-resolution liquid-state experiments. The transfer through J coupling is shown to be efficient and more selective than those based on heteronuclear dipolar couplings. The experiment, which works at high MAS spinning frequencies, yields the unambiguous assignment of the proton resonances. The experiment is demonstrated on several organic compounds.
An Imprecise Stopping Criterion Based on In-Between Layers Partial Syndromes (2017)

In this letter, we address the issue of early stopping criterion for layered LDPC decoders, aiming at more safeness with low hardware cost and minimum latency. We introduce a new on-the-fly measure in the decoder, called in-between layers partial syndrome, and define a family of stopping criteria, with different tradeoffs among complexity, latency, and performance. Numerical results show that our stopping criteria surpass existing solutions, and can be as safe as the full-syndrome detection, down to frame error rates (FERs) as low as FER = 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-8</sup> .
Hydrogen Permeation of Eutectic Nb-Zr-Ni Alloy Membranes Containing Primary Phases (2004)

Hydrogen permeability (φ) of eutectic Nb-Zr-Ni alloy membranes containing the primary phases ZrNi or bcc-(Nb, Zr) was measured using a gas flow meter. φ of the Nb10Zr45Ni45 alloy containing the primary ZrNi phase (16 vol%) was 2.35 × 10−8 [mol H2 m−1 s−1 Pa−0.5] at 673 K, while φ of the Nb20Zr40Ni40 alloy containing the primary bcc-(Nb, Zr) phase (18 vol%) was 2.73 × 10−8 [mol H2 m−1 s−1 Pa−0.5] at 673 K. These values were higher than that of pure Pd and of the Nb39Ti31Ni30 alloy that shows the highest φ value in the Nb-Ti-Ni system. The present work strongly supported our previous proposal that multiphase alloys containing eutectic structures, which suppress a hydrogen embrittlement, are promising as novel hydrogen permeation membranes.
R&D on Composition and Processing of Titanium Aluminide Alloys for Turbine Engines (1984)

Abstract : In this current program, one alpha-two and several gamma compositions were selected, produced as large ingots and isothermally forged. Extensive mechanical property testing was conducted on these forgings. In addition, various material processing methods such as casting, rolling, extrusion and machining were evaluated. The alpha-two alloy Ti-25Al-10Nb-3V-1Mo exhibited the best balance of tensile and stress-rupture properties found to date and had a higher elastic modulus. Beta grain size was shown to have major effects on creep, low cycle fatigue and fracture toughness. Alloy stability, as measured by post-exposure tensile ductility, was poor and was tentatively traced to precipitation of an unidentified phase in the beta. Heat treatment modifications were suggested to alleviate this problem. Processing studies showed that many of the methods developed for forging, joining and rolling of conventional titanium alloys can be applied to the alpha-two alloys. Screening tests conducted on four gamma alloys did not identify an alloy with a better property balance than Ti- 48Al-1V-.1C which had been evaluated previously. Properties were more consistent with previous small scale ingots, although ductility and impact strength were somewhat lower, and quite good toughness levels were measured. Alloy stability was excellent after exposure and processing studies established machining procedures and demonstrated and demonstrated that the alloy has fair castability.
MIMO multiuser cognitive relay network in spectrum sharing environment with antenna correlation over Rayleigh fading channels (2015)

In this paper, we examine the impact of antenna correlation on transmit antenna selection with maximal ratio combining (TAS/MRC)in multiple-input-multiple-output multiuser cognitive relay networks (MIMO-MCRNs). A single secondary user (SU) source communicates with M SU destinations via SU decode-and-forward (DF) relay over Rayleigh fading channels and in the presence of L PU destinations. Each node in the considered SU network is equipped with multiple correlated antennas as well as the L PU destinations. The SU network employs underlay spectrum sharing paradigm in which the SU transmission power is limited by peak interference temperature limit on the PU network and the maximum allowable transmission power at each node of the SU network. As a measure of performance, we derived an exact expression for the outage probability of the proposed SU network. To gain further insights, a simple asymptotic expression for the outage probability is provided to obtain the achievable diversity order and coding gain.
Adhesive hydrogel nanocomposites with independently tunable rheology and mechanics for wet arthroscopic application (2016)

Frontiers Events is a rapidly growing calendar management system dedicated to the scheduling of academic events. This includes announcements and invitations, participant listings and search functionality, abstract handling and publication, related events and post-event exchanges. Whether an organizer or participant, make your event a Frontiers Event!
Preparation of 1,3,5-triamino-2,4,6-trinitrobenzene from 3,5-dichloroanisole (1987)

Abstract Nitration of 3,5-dichloroanisole under relatively mild conditions gave 3,5-dichloro-2,4,6-trinitroanisole (DCTNA) in high yield and purity. Ammonolysis of the DCTNA afforded 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). Treatment of DCTNA with thionyl chloride and dimethylformamide gave 1,3,5-trichloro-2,4,6-trinitrobenzene (TCTNB). Ammonolysis of TCTNB also produced TATB. Comparisons of these routes with that starting from nitration of 1,3,5-trichlorobenzene have been made.
Differential Expression of the Tick Protective Antigen Subolesin in <i>Anaplasma marginale</i>‐ and <i>A. phagocytophilum</i>‐infected Host Cells (2008)

Subolesin was recently shown in vaccine and RNA interference (RNAi) studies to protect against tick infestations and to affect tick feeding, reproduction, and development as well as infection of host cells by Anaplasma marginale and A. phagocytophilum. Recent experiments provided evidence that infection of both tick and vertebrate host cells with these two pathogens modified gene expression. We therefore hypothesized that infection of host cells with A. marginale and A. phagocytophilum affects expression of subolesin. Subolesin mRNA levels were determined by real-time reverse transcriptase (RT)-PCR in uninfected and A. marginale-infected Dermacentor variabilis guts and salivary glands and IDE8-cultured tick cells and in uninfected and A. phagocytophilum-infected Ixodes scapularis nymphs, ISE6-cultured tick cells, and the human cell line HL-60. In addition, the effect of subolesin on Anaplasma spp. infection/multiplication was characterized by RNAi in tick tissues and/or cultured tick and human cells. These experiments presented evidence of differential expression of subolesin in A. marginale- and A. phagocytophilum-infected cells. Subolesin was differentially expressed in A. marginale-infected ticks in a tissue-specific manner in which mRNA levels increased in response to A. marginale infection in tick salivary gland cells but not in the gut cells. Subolesin knockdown by RNAi reduced Anaplasma infection/multiplication only in cells in which infection increased subolesin expression, i.e., in A. marginale-infected D. variabilis salivary glands and IDE8 cells. The results reported herein further support the role of subolesin in Anaplasma-host interactions and suggest a putative role of subolesin in vaccines for the control of pathogen infection/multiplication in ticks.