gebhart/patrepeval huggingface dataset:
Uncovering regimes in out of sample forecast errors from predictive regressions (2020)

We introduce a set of test statistics for assessing the presence of regimes in out of sample forecast errors produced by recursively estimated linear predictive regressions that can accommodate multiple highly persistent predictors. Our tests statistics are designed to be robust to the chosen starting window size and are shown to be both consistent and locally powerful. Their limiting none distributionsare also free of nuisance parameters and hence robust to the degree of persistence of the predictors.Our methods are subsequently applied to the predictability of the value premium whose dynamics are shown to be characterised by state dependence.
Quantification of Coronary Atherosclerosis in the Assessment of Coronary Artery Disease (2018)

URL: https://www.clinicaltrials.gov. Unique identifier: NCT02803411.
Preservation of thalamic neuronal function may be a prerequisite for pain perception in diabetic neuropathy: A magnetic resonance spectroscopy study (2023)

In this largest cerebral MRS study in DPN, thalamic neuronal dysfunction was found in advanced painless-DPN with preservation of function in subclinical- and painful-DPN. Furthermore, there was a preservation of neuronal function within the S1 cortex in all subgroups of DPN. Therefore, there may be a proximo-distal gradient to central nervous system alterations in painless-DPN, with thalamic neuronal dysfunction occurring only in established DPN. Moreover, these results further highlight the manifestation of cerebral alterations between painful- and painless-DPN whereby preservation of thalamic function may be a prerequisite for neuropathic pain in DPN.
Enhancement of perovskite solar cells by plasmonic nanoparticles (2016)

Synthetic perovskites with photovoltaic properties open a new era in solar photovoltaics. Due to high optical absorption perovskite-based thin-film solar cells are usually considered as fully absorbing solar radiation on condition of ideal blooming. However, is it really so? The analysis of the literature data has shown that the absorbance of all photovoltaic pervoskites has the spectral hole at infrared frequencies where the solar radiation spectrum has a small local peak. This absorption dip results in the decrease of the optical efficiency of thin-film pervoskite solar cells by nearly 3% and close the ways of utilise them at this range for any other applications. In our work we show that to cure this shortage is possible complementing the basic structure by an inexpensive plasmonic array.
Identification of a Residue in Hepatitis C Virus E2 Glycoprotein That Determines Scavenger Receptor BI and CD81 Receptor Dependency and Sensitivity to Neutralizing Antibodies (2008)

Hepatitis C virus (HCV) infection is dependent on at least three coreceptors: CD81, scavenger receptor BI (SR-BI), and claudin-1. The mechanism of how these molecules coordinate HCV entry is unknown. In this study we demonstrate that a cell culture-adapted JFH-1 mutant, with an amino acid change in E2 at position 451 (G451R), has a reduced dependency on SR-BI. This altered receptor dependency is accompanied by an increased sensitivity to neutralization by soluble CD81 and enhanced binding of recombinant E2 to cell surface-expressed and soluble CD81. Fractionation of HCV by density gradient centrifugation allows the analysis of particle-lipoprotein associations. The cell culture-adapted mutation alters the relationship between particle density and infectivity, with the peak infectivity occurring at higher density than the parental virus. No association was observed between particle density and SR-BI or CD81 coreceptor dependence. JFH-1 G451R is highly sensitive to neutralization by gp-specific antibodies, suggesting increased epitope exposure at the virion surface. Finally, an association was observed between JFH-1 particle density and sensitivity to neutralizing antibodies (NAbs), suggesting that lipoprotein association reduces the sensitivity of particles to NAbs. In summary, mutation of E2 at position 451 alters the relationship between particle density and infectivity, disrupts coreceptor dependence, and increases virion sensitivity to receptor mimics and NAbs. Our data suggest that a balanced interplay between HCV particles, lipoprotein components, and viral receptors allows the evasion of host immune responses.
T-RECs: rapid and large-scale detection of recombination events among different evolutionary lineages of viral genomes (2017)

T-RECs is very effective, as demonstrated by an analysis of 555 Norovirus complete genomes and 2500 sequence fragments, where a recombination hotspot was identified at the ORF1-ORF2 junction.
Hierarchical Schema Representation for Text-to-SQL Parsing With Decomposing Decoding (2019)

Most of existing studies on parsing natural language (NL) for constructing structured query language (SQL) do not consider the complex structure of database schema and the gap between NL and SQL query. In this paper, we propose a schema-aware neural network with decomposing architecture, namely HSRNet, which aims to address the complex and cross-domain Text-to-SQL generation task. The HSRNet models the relationship of the database schema with a hierarchical schema graph and employs a graph network to encode the information into sentence representation. Instead of end-to-end generation, the HSRNet decomposes the generation process into three phases. Given an input question and schema, we first choose the column candidates and generate the sketch grammar of the SQL query. Then, a detail completion module fills the details based on the column candidates and the corresponding sketch. We demonstrate the effectiveness of our hierarchical schema representation by incorporating the information into different baselines. We further show that the decomposing architecture significantly improves the performance of our model. Evaluation of Spider benchmark shows that the hierarchical schema representation and decomposing architecture improves our parser result by 14.5% and 4.3% respectively.
Bandwidth and power allocation for two-way relaying in overlay cognitive radio systems (2014)

In this paper, the problem of both bandwidth and power allocation for two-way multiple relay systems in overlay cognitive radio (CR) setup is investigated. In the CR overlay mode, primary users (PUs) cooperate with cognitive users (CUs) for mutual benefits. In our framework, we propose that the CUs are allowed to allocate a part of the PUs spectrum to perform their cognitive transmission. In return, acting as an amplify-and-forward two-way relays, they are used to support PUs to achieve their target data rates over the remaining bandwidth. More specifically, CUs acts as relays for the PUs and gain some spectrum as long as they respect a specific power budget and primary quality-of-service constraints. In this context, we first derive closed-form expressions for optimal transmit power allocated to PUs and CUs in order to maximize the cognitive objective. Then, we employ a strong optimization tool based on particle swarm optimization algorithm to find the optimal relay amplification gains and optimal cognitive released bandwidths as well. Our numerical results illustrate the performance of our proposed algorithm for different utility metrics and analyze the impact of some system parameters on the achieved performance.
Tunable fiber-optic imaging bundle SERS substrates (2009)

Chemical imaging not only provides structural and spatial information about a sample but also chemical information about the sample. Raman spectroscopy can be a powerful transduction mechanism for chemical imaging due to the narrow vibrational bandwidths and unique spectral fingerprints. Unfortunately, Raman cross-sections are extremely weak (~10<sup>-30</sup> cm<sup>-2</sup>), often necessitating long exposure times, making dynamic chemical imaging impractical, particularly for high-resolution images. By utilizing a Raman enhancement technique such as surface enhanced Raman spectroscopy (SERS), the effective scattering cross-sections are increased making practical imaging times feasible. This paper will discuss the fabrication, characterization, and demonstration of a novel SERS substrate and instrumental system for non-scanning SERS chemical imaging with sub-diffraction limited spatial resolution. These substrates are fabricated by chemically etching a polished fiber optic imaging bundle consisting of 30,000, hexagonally packed, 4- micron diameter elements. The chemical etching process creates uniform array of cladding spikes onto which a SERS active metal is vacuum deposited, forming the SERS active surface. By varying the size of the silver islands deposited on the cladding peaks active surface plasmons can be tuned to various excitation frequencies. SERS signals measured both on and off the plasmon absorption band demonstrate that these SERS fiber bundles can be tuned for various excitation frequencies.
Bioanalytical Characterization of Apple Juice from 88 Grafted and Nongrafted Apple Varieties Grown in Upper Austria (2014)

The compositional characteristics of untreated pure juice prepared from 88 apple varieties grown in the region of Eferding/Upper Austria were determined. Many of the analyzed varieties are noncommercial, old varieties not present in the market. The aim of the study was to quantitate the mineral, phosphate, trace elements, and polyphenolic content in order to identify varieties that are of particular interest for a wider distribution. Great variations among the investigated varieties could be found. This holds especially true for the total polyphenolic content (TPC) ranging from 103.2 to 2,275.6 mg/L. A clear dependence of the antioxidant capacity on the TPC levels was detected. Bioinformatics was employed to find specific interrelationships, such as Mg²⁺/Mn²⁺ and PO₄³⁻/K⁺, between the analyzed bio- and phytochemical parameters. Furthermore, special attention was drawn on putative effects of grafting on the phytochemical composition of apple varieties. By grafting 27 different apple varieties on two trees grown close to each other, it could be shown that the apple fruits remain their characteristic phytochemical composition. Finally, apple juice prepared from selected varieties was further characterized by additional biochemical analysis including cytotoxicity, epidermal growth factor receptor (EGFR) inhibition, and α-amylase activity tests. Cytotoxicity and inhibition of EGFR activation were found to be dependent on the TPC, while α-amylase activity was reduced by the apple juices independent of the presence of polyphenolic substances. Taken together selected apple varieties investigated within this study might serve as preferable sources for the development of apple-based food with a strong focus on health beneficial effects.
Some results on the complex adjustment and start-up of the IHEP proton synchrotron (1970)

Ado, Yu M; Zhuravlev, A A; Logunov, A A; Myae, E A; Naumov, A A; Pisarevskij, V E; Rogozinskij, V G; Tushabramishvili, K Z; Shukejlo, I A; Bojko, S N; Komar, E G; Malyshev, I F; Mozin, I V; Monoszon, N A; Mozalevskij, I A; Spevakova, F M; Stolov, A M; Titov, V A; Vodopyanov, F A; Kuzmin, A A; Kuzmin, F V; Mints, F V; Rubchinskij, S M; Uvarov, V A; Gutner, B M; Zalmanzon, V B; Prokopev, A I; Temkin, A S
NBMP Standard Use Case: 3D Human Reconstruction Workflow (2021)

We present a demonstration of Network Based Media Processing (NBMP) standard-compliant cloud service for reconstructing and Augmented Reality (AR) display of fully textured 3D human model using 2-5 images captured with a smartphone.
Functional genes to assess nitrogen cycling and aromatic hydrocarbon degradation: primers and processing matter (2013)

Targeting sequencing to genes involved in key environmental processes, i.e., ecofunctional genes, provides an opportunity to sample nature's gene guilds to greater depth and help link community structure to process-level outcomes. Vastly different approaches have been implemented for sequence processing and, ultimately, for taxonomic placement of these gene reads. The overall quality of next generation sequence analysis of functional genes is dependent on multiple steps and assumptions of unknown diversity. To illustrate current issues surrounding amplicon read processing we provide examples for three ecofunctional gene groups. A combination of in silico, environmental and cultured strain sequences was used to test new primers targeting the dioxin and dibenzofuran degrading genes dxnA1, dbfA1, and carAa. The majority of obtained environmental sequences were classified into novel sequence clusters, illustrating the discovery value of the approach. For the nitrite reductase step in denitrification, the well-known nirK primers exhibited deficiencies in reference database coverage, illustrating the need to refine primer-binding sites and/or to design multiple primers, while nirS primers exhibited bias against five phyla. Amino acid-based OTU clustering of these two N-cycle genes from soil samples yielded only 114 unique nirK and 45 unique nirS genus-level groupings, likely a reflection of constricted primer coverage. Finally, supervised and non-supervised OTU analysis methods were compared using the nifH gene of nitrogen fixation, with generally similar outcomes, but the clustering (non-supervised) method yielded higher diversity estimates and stronger site-based differences. High throughput amplicon sequencing can provide inexpensive and rapid access to nature's related sequences by circumventing the culturing barrier, but each unique gene requires individual considerations in terms of primer design and sequence processing and classification.
Total Antioxidant Capacity and Reactive Oxygen Species in Amniotic Fluid (2003)

In Brief OBJECTIVE To identify the presence and/or absence of reactive oxygen species and total antioxidant capacity in amniotic fluid and to determine changes in the levels of reactive oxygen species and total antioxidant capacity with advancing gestational age of pregnancy and fetal or neonatal weights. METHODS Amniotic fluid was collected from a total of 26 nonsmoking patients. Nine specimens were collected in the third trimester of pregnancy, and 17 specimens were collected in the second trimester. Amniotic fluid reactive oxygen species and total antioxidant capacity levels were determined by chemiluminescence and spectrophotometric assays, respectively. Reactive oxygen species and total antioxidant capacity levels were established and then compared for advancing gestational ages and estimated fetal weights or neonatal weights. RESULTS Reactive oxygen species levels were present in some but not all specimens, and total antioxidant capacity was present in all specimens. Total antioxidant capacity but not reactive oxygen species levels increased from the second to the third trimester (347.0 mmol/L versus 776.0 mmol/L, P < .001). There was a positive Spearman correlation between total antioxidant capacity and gestational age (r = 0.72, 95% confidence interval 0.43, 1.0, P < 001) and between total antioxidant capacity and estimated fetal weights or neonatal birth weights (r = 0.70, 95% confidence interval 0.40, 1.0, P < .001). There was no correlation between reactive oxygen species and advancing gestational age or weight. CONCLUSION Total antioxidant capacity levels are present in amniotic fluid at least as early as the second trimester and increase with advancing gestational age and fetal or neonatal weights. Reactive oxygen species levels are not necessarily present in amniotic fluid, and they do not appear to be influenced by gestational age or estimated fetal or neonatal weights. Unlike levels of reactive oxygen species, total antioxidant capacity in amniotic fluid increases with fetal gestational age and fetal or neonatal weight.
Knowledge-aware Zero-Shot Learning: Survey and Perspective (2021)

Zero-shot learning (ZSL) which aims at predicting classes that have never appeared during the training using external knowledge (a.k.a. side information) has been widely investigated. In this paper we present a literature review towards ZSL in the perspective of external knowledge, where we categorize the external knowledge, review their methods and compare different external knowledge. With the literature review, we further discuss and outlook the role of symbolic knowledge in addressing ZSL and other machine learning sample shortage issues.
Protonated 3-fluoropiperidines: an unusual fluoro directing effect and a test for quantitative theories of solvation (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtonated 3-fluoropiperidines: an unusual fluoro directing effect and a test for quantitative theories of solvationDavid C. Lankin, Nizal S. Chandrakumar, Shashidhar N. Rao, Dale P. Spangler, and James P. SnyderCite this: J. Am. Chem. Soc. 1993, 115, 8, 3356–3357Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs.org/doi/10.1021/ja00061a055https://doi.org/10.1021/ja00061a055research-articleACS PublicationsRequest reuse permissionsArticle Views635Altmetric-Citations82LEARN 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 (2)»Supporting Information Supporting Information Get e-Alerts
Distributed Dynamic Channel Assignment in Military Ad Hoc Networks within the MAENA Project: New Algorithm and High Fidelity Simulation Results (2021)

In this paper, we present results coming from the Multi bAnd Efficient Networks for Ad hoc communications (MAENA) project. We present a distributed dynamic channel assignment (DDCA) algorithm for military clustered ad hoc networks that has been designed during the project. To design the proposed algorithm, we start from an existing algorithm called greedy based dynamic channel assignment (GBDCA). We first identify the main drawbacks of this algorithm, and then we propose modifications to alleviate these drawbacks yielding the proposed GBDCA++ solution. We also explain how to implement the GBDCA++ algorithm in a military waveform developed in the MAENA project. Finally, we show the superiority of GBDCA++ over GBDCA by providing high fidelity simulation results obtained using the simulator developed within the framework of the MAENA project.
ChemInform Abstract: Preparation of α‐Quinque‐ and α‐Septithiophenes and Their Positional Isomers. (1987)

Abstract α‐Bithiophene (Ia) and α‐terthiophene (Ib) are transformed into α‐quinque‐ and α‐septithiophene (IIIa) and (IIIb) respectively as shown in the reaction scheme.
Supplementary Figure S3 from Human Metastatic Cholangiocarcinoma Patient-Derived Xenografts and Tumoroids for Preclinical Drug Evaluation (2023)

&lt;p&gt;Genomic rearrangements resulting in FGFR2 fusions. (A) Genomic rearrangements resulting in FGFR2 fusion identified in CCA_PDX and the corresponding biopsy samples. Fusion partner genes, their accession number, breakpoints, and predicted chimeric protein products are indicated.&lt;/p&gt;
Liquid‐crystalline ordering in solutions of polyelectrolytes (1997)

Abstract The isotropic‐nematic phase transition in solutions of stiff‐chain polyelectrolytes is considered on the basis of the Onsager approach for the limiting cases of charged rods and persistent macrolecules. We plotted a full family of phase diagrams for orientational transitions in solutions of polyelectrolytes with any charge density as a function of the low‐molecular‐weight salt concentration. It is shown that charging of macromolecules can lead not only to the renormalization of the chain diameter (discussed by Onsager) or to the twisting effect (predicted by Odijk et al.), but in some cases also to a variety of other regimes, including transitions with very narrow phase separation regions, or with a second orientational transition to a highly oriented nematic phase upon the increase of polymer concentration.
Supplementary Figure 2 from The Novel miR-7515 Decreases the Proliferation and Migration of Human Lung Cancer Cells by Targeting c-Met (2023)

&lt;p&gt;PDF file - 69K, The expression of hc-smR-S2-5 in various cell types: The expression of hc-smR-S2-5 in various cell types was determined by poly A-tailed RT-PCR&lt;/p&gt;
A 50-Gbit/s 450-mW Full-Rate 4:1 Multiplexer With Multiphase Clock Architecture in 0.13-$\mu{\hbox {m}}$ InP HEMT Technology (2007)

A full-rate multiplexer (MUX) with a multiphase clock architecture for over 40 Gbit/s optical communication systems is presented. The 4:1 MUX is comprised of a re-timer based on a D-type flip-flop (DFF) and a clock tree system that uses EXOR-type delay buffers to match its skews well to those of the data. The supply voltage is reduced to -1.5 V by analyzing the voltage allocation. Fabricated in a 0.13-mum InP HEMT technology, a DFF test circuit achieved 75-Gbit/s operation and exhibited performance sufficient to re-time 50-Gbit/s serialized data. The 4:1 MUX measurement results demonstrate successful 50-Gbit/s operation at room temperature, and 40-Gbit/s operation, which has 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-11</sup> error free for 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">31</sup> - 1 pseudorandom bit stream (PRBS) data, up to an ambient temperature of 90 degrees or down to - 1.24 V of supply voltage. The circuit consumes 450 mW at a - 1.5-V supply and exhibits an output jitter of 283 fs rms at 50-Gbit/s operation. We also propose a multiphase clock generator for a MUX that has a serialization of more than four channels.