gebhart/patrepeval huggingface dataset:
Syntheses, crystalline structure, and ion-exchange properties of insoluble acid salts of tetravalent metals and their salt forms (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, crystalline structure, and ion-exchange properties of insoluble acid salts of tetravalent metals and their salt formsGiulio AlbertiCite this: Acc. Chem. Res. 1978, 11, 4, 163–170Publication Date (Print):April 1, 1978Publication History Published online1 May 2002Published inissue 1 April 1978https://pubs.acs.org/doi/10.1021/ar50124a007https://doi.org/10.1021/ar50124a007research-articleACS PublicationsRequest reuse permissionsArticle Views840Altmetric-Citations258LEARN 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
Predicting Pavement Condition Index Using International Roughness Index in a Dense Urban Area (2015)

A number of pavement condition indices are obtained and used to conduct pavement management assessments, two of which are the International Roughness Index (IRI) and Pavement Condition Index (PCI). The IRI is typically obtained using specialized equipment which indicates the smoothness of the roadway segment based on established computer algorithms, while the PCI is based on subjective rating of the number of pavement distresses. The literature suggests that most of these pavement indices are related as a result of which several jurisdictions have developed models to predict one index from the other. This study used 2 years of IRI-PCI data sets to develop models that predict PCI from IRI by functional classification and by pavement type in the District of Columbia. The results of the descriptive statistics, based on the mean IRI and PCI values, suggest that highways have a smoother ride than arterials, followed by collectors and local roads. Similarly, when the data was analyzed by pavement type, the results show that Composite Pavements were smoother than Asphalt Pavements followed by Concrete Pavement. The regression models between the IRI and PCI by functional classification and pavement type were determined to be statistically significant within the margin of error (5% level of significance), with R 2 values between 0.56 and 0.82. The results of the ANOVA tests also showed statistically significant F - statistics (p < 0.05) in addition to statistically significant regression coefficients (from the t-tests, with p < 0.05). The residual plots for all the models also showed randomness about the zero line indicating their viability, in addition to the normal probability plots showing points near a straight line.
High Performance FM-IF IC for Systems with Search Tuning Stop and Multipath Interference Detection (1986)

Mobile antennas, located close to the ground, e.g. receivers in vehicles, are subject to continuously changing field strength levels. Through the effects of scattering and reflection, partial waves are superimposed on the direct signal depending on time and location and lead to interferences due to multipath (MP) reception.
Expression, deleton and mutation of<i>p16</i>gene in human gastric cancer (2001)

The expression loss of p16 protein related to the gastric carcinogenesis, gastric carcinoma histopathological subtypes and lymph metastasis. The mutation of p16 gene in exon 2 may not be involved in gastric carcinogenesis. But the deletion of p16 gene in exon 2 may be involved in gastric carcinogenesis.
Laser diagnostics for research in coal combustion (1989)

Recent results are presented for the application of laser spark emission spectroscopy in the determination of elemental composition of particles in the combustion zone of a pulverized coal flame. The technique is particularly sensitive to metallic elements, and may be very useful in the study of mineral matter transformations during combustion. High energy laser pulses were used to form plasmas on single coal particles, and time-resolved spectra of the optical emission was collected using a linear diode array detector. The various transitions were assigned, and qualitative trends in elemental composition for well-characterized coals were observed to be in agreement with other analytical results. Semi-quantitative elemental concentrations were calculated and are presented.
A robust estimation method for topology error identification (1999)

A pre-processing method that identifies both multiple topology errors and bad measurements is described. The method determines the branch statuses by testing the real and reactive power flow estimates of all the branches of the network, irrespective of their assumed statuses. The power flows are the state variables of two decoupled real and reactive power models that stem from both a detailed substation representation and a super-node modeling. They are estimated by means of the iteratively reweighted least-squares algorithm that implements the Huber M-estimator. The procedure is not prone to divergence problems, which is of great value in a real-time environment. The performance of the method is demonstrated on the IEEE-118 bus system.
Some baby-step giant-step algorithms for the low hamming weight discrete logarithm problem (2001)

In this paper, we present several baby-step giant-step algorithms for the low hamming weight discrete logarithm problem. In this version of the discrete log problem, we are required to find a discrete logarithm in a finite group of order approximately $2^m$, given that the unknown logarithm has a specified number of 1âs, say $t$, in its binary representation. Heiman and Odlyzko presented the first algorithms for this problem. Unpublished improvements by Coppersmith include a deterministic algorithm with complexity $O \left ( m \left (\begin {smallmatrix}m / 2 t / 2\end {smallmatrix}\right ) \right )$, and a Las Vegas algorithm with complexity $O \left ( \sqrt {t} \left (\begin {smallmatrix}m / 2 t / 2\end {smallmatrix} \right )\right )$. We perform an average-case analysis of Coppersmithâs deterministic algorithm. The average-case complexity achieves only a constant factor speed-up over the worst-case. Therefore, we present a generalized version of Coppersmithâs algorithm, utilizing a combinatorial set system that we call a
Probing the onset and regulation of erythroid cell-specific gene expression. (2005)

Cell-restricted transcriptional modulators play a crucial role in the process of selective gene regulation during hematopoiesis. Erythroid Kruppel-like factor (EKLF; KLF1) is a transcription factor, originally identified in this laboratory, which plays a crucial role as a transcriptional activator at the adult beta-globin locus. This review will describe a subset of experiments and approaches related to deciphering its mechanism of action and the means by which it itself is induced.
Multiple contexts in a multi-ported VLIW register file implementation (2015)

The register file is an expensive component in the design of any processor, especially, when considering the additional ports that are needed to support multiple datapaths within a wide-issue VLIW processor. In a recent work, these additional resources were used to dynamically reconfigure the register file to support a dynamically reconfigurable VLIW core. The design can be perceived as a single 8-issue, two 4-issue, or four 2-issue VLIW cores. Consequently, the multi-ported design can operate in different modes, namely as one, two, or four register files, respectively, corresponding to the active number of cores. The implementation of the register file design on FPGAs using Block RAMs still results in unused resources due to the coarseness of the Block RAMs. In this paper, we propose to re-purpose these unused BRAM resources to additionally support multiple contexts next to earliermentioned modes. In this manner, the 8-issue, 4-issue, and 2- issue cores have access to 4, 2, and 1 contexts, respectively. Consequently, we can avoid saving and restoring of the task states in a multi-task environment, turning context switching from a traditionally time-consuming event to an almost instantaneous event. The advantage of this is the reduction of interrupt latency and task switching latency, which are important in real-time and embedded systems. Our results show that our technique can improve interrupt latency by a factor of 17.4x compared to using a software register spill routine, depending on the behavior of the memory system. Likewise, the task switching time can be improved by 6.7x.
Phase-regenerative multicasting of BPSK signals by hybrid optical phase squeezer (2014)

We demonstrate 1-to-2 wavelength phase-regenerative multicasting of 10.75-Gb/s BPSK signals using hybrid optical phase squeezer. Employing a standard highly nonlinear fiber, efficient quadrature squeezing with 30dB extinction ratio was performed with only 160mW pump power.
Case 4-1965 (1965)

Presentation of CaseA fifty-nine-year-old retired gardener was admitted to the hospital because of weakness of the legs.Seven years previously ocular pemphigus developed, resulting in severe corneal scarring. Six months before admission there was the onset of a cough productive of sputum, wheezing, exertional dyspnea, anorexia, night sweats and occasional shaking chills. An x-ray film of the chest was interpreted as showing bronchitis, and he was given various medications, including erythromycin, tetracycline, aminophylline, triamcinolone and potassium iodide. The respiratory symptoms subsided within a few months. Two months before admission progressive weakness of the legs began. Soon thereafter a burning . . .
Analysis of genes encoding two unique type IIa immunoglobulin G-binding proteins expressed by a single group A streptococcal isolate (1994)

An emm-like gene (emmL) and a fcrA gene from group A streptococcal strain 64/14 (emmL64/14 and fcrA64/14) were amplified by PCR and force cloned into the heat-inducible expression vector pJLA 602. The emmL gene encoded a recombinant protein that bound human IgG1, IgG2, and IgG4 in a nonimmune fashion. This is the reactivity profile of a type IIa IgG-binding protein. The emmL64/14 gene product was antigenically similar to the previously identified high-molecular-weight type IIa IgG-binding protein of strain 64/14 and had an N-terminal sequence identical to that of the wild-type protein. The fcrA gene also encoded a recombinant protein with type IIa functional activity. This protein was similar to the lower-molecular-weight type IIa IgG-binding protein previously isolated from strain 64/14 and was antigenically distinct from the higher-molecular-weight type IIa protein encoded by the emmL64/14 gene. The sequences for both genes including the intervening regions are presented. The emmL gene demonstrates significant homology to other class I emm and emmL genes expressed by opacity factor-negative group A streptococcal isolates. The fcrA gene was found to be homologous to other fcrA genes normally present in opacity factor-positive group A isolates. The sequence upstream of the fcrA gene and the intervening sequence between the end of the fcrA gene and the start of the emmL gene were similar to those reported for other fcrA genes.
The Case for International Antitrust (2004)

Competition policy is made at the national level but a great deal of the business activity that it seeks to regulate takes place at the international level. Though it is universally accepted that some level of international cooperation is necessary to make regulation effective under these conditions, there is a considerable diversity of views on the question of how much cooperation is appropriate. The presence of international activity distorts competition policy in at least two ways. First, it causes the preferred domestic policies of states to diverge from what they would be in the absence of such activity. States that are net exporters of goods sold in imperfectly competitive markets have an incentive to weaken their antitrust rules and states that are net importers of such goods have reason to tighten theirs. Second, the choice of law rules adopted to establish the jurisdictional reach of domestic law create an additional divergence between the substantive laws actually chosen and those that would be chosen by a closed economy. States that choose to limit their laws to activities that take place within their territory are better off if they also weaken their substantive laws. States that extend the reach of their laws generate overlapping jurisdiction and force firms to run a gauntlet of legal rules that includes the strictest elements of each state’s laws, leading to a de facto regulatory standard that is stricter than that of any single state. This chapter explains why these problems cannot be resolved through the sort of low levels of cooperation that dominate current international antitrust efforts. Information sharing in particular cannot address the distortions to competition policy generated by cross-border business. Choice of law strategies can improve the regulatory framework, but can only partially address the problem and even this would require a dramatic change to existing policies. What is required, then, is a deeper form of cooperation on the subject of substantive laws or international standards. Though cooperation of this sort is difficult to achieve, there is no other way to address the policy distortions created when national authorities try to regulate international competition.
Synthesis of 5,5,6,6‐D4‐<scp>L</scp>‐lysine‐aflatoxin B<sub>l</sub> for use as a mass spectrometric internal standard (2004)

Abstract Human exposure to the hepatocarcinogenic mycotoxin aflatoxin B l results in modification of serum albumin lysine ε ‐amino residues to form lysine‐aflatoxin adducts. A perdeuterated reference standard is now required to quantitatively measure this adduct in epidemiologic studies of liver cancer using isotopic dilution mass spectrometry. A convenient method for the preparation of D4‐ L ‐lysine‐AFB l using commercially available 5,5,6,6‐D4‐ l ‐lysine is demonstrated for the first time. The application of two standard α ‐amino protection methods is also reported that simplifies the production of natural isotopic abundance lysine‐AFB l over the currently used method employing N α ‐acetyl‐ l ‐lysine. t ‐Boc‐N α ‐lysine was used to prepare lysine‐AFB l ; however, a preferred method for directing reaction of AFB l ‐dialdehyde to the ε ‐amino group of 5,5,6,6‐D4‐ l ‐lysine utilized cupric ions that were spontaneously removed during the reverse phase HPLC purification of D4‐lysine‐AFB l using 1% HOAc. This strategy eliminates the need to otherwise synthesize and purify t ‐Boc‐N α ‐ or N α ‐acetyl‐5,5,6,6‐D4‐lysine and then TFA or enzymatically deprotect overnight to obtain the target compound. Copyright © 2004 John Wiley & Sons, Ltd.
Broadband MIMO powerline channel emulator (2014)

Testing Broadband powerline modems was challenging in the past but will become much more challenging in the near future. Todays PLC modems mostly use SISO technology which means that they transmit and receive their data only between live an neutral wires. New PLC standards like HomePlug AV2.0 [1] or ITU-T G.hn G9963 [2] allow MIMO transmission by using the protective earth wire as additional transmission path. This paper presents a flexible FGPA based broadband PLC channel emulator which allows very reliable and reproducible testing of MIMO PLC modems.
Quantitative Evaluation of the Single-Flux- Quantum Cross/Bar Switch (2005)

We demonstrated the 4 /spl times/ 4-cross/bar-40 Gbps/ch switch which is functionally compatible with a commercial semiconductor one in order to evaluate the current SFQ circuit technology quantitatively in both a operating speed and power consumption. According to our numerical simulations, the SFQ switch has one or two orders of magnitude higher throughput per a single channel than that of the semiconductor, and has much smaller exchanging times between routing paths. In an actual test based on the NEC Nb-2.5 kA/cm/sup 2/ junction technology, correct operation using an on-chip test system made up of 4700 Josephson junctions was confirmed up to 37 Gbps/ch which is about 14 times faster than the semiconductor of 2.7 Gbps/ch speed. We also confirmed that SFQ circuits consumed 1/800 power compared with those of semiconductor. The reason why data rates obtained experimentally did not reach the designed speed of 40 Gbps/ch is due to both the timing error and the influence of magnetic fields caused by large bias currents exceeding 500 mA. These results of quantitative evaluation show that the SFQ technology has much greater potentials than the semiconductor one in both the operating speed and the power consumption, which means it is very effective to apply the SFQ technology to digital applications.
Long-term and short-term analysis of compatibility between satellite earth station and terrestrial fixed system in X-band (2014)

Interference scenario and methodology between an earth station (ES) of fixed-satellite service (FSS) and a fixed wireless system (FWS) in the terrestrial fixed service (FS) in a co-channel environment in X-band are established. Taking into account path loss between two systems and long-term and short-term protection criteria for FWS, we performed computational simulation to obtain required separation distance for adequate protection of FWS. The methodology and results would be useful when considering new frequency allocations to FSS in X-band to which FS has been allocated and planning ES deployment for FSS without unacceptable interference impact on FWS.
Bayesian networks as ensemble of classifiers (2003)

Classification of real-world data poses a number of challenging problems. Mismatch between classifier models and true data distributions on the one hand and the use of approximate inference methods on the other hand all contribute to inaccurate classification. Recent work on boosting by Schapire et al. and additive probabilistic models by Hastie et al. have shown that improved classification can be achieved by linearly combining a number of simple classifiers. Building upon this spirit, we present a Bayesian network-based framework for mixing multiple classifiers. We also analyze the bound on the generalization error for this combined classifier. We give results on some standard datasets and demonstrate their usefulness in a real-world task of multimodal speaker detection where we improve upon performance of a more complex Bayesian network model. Improved results indicate the significant potential of the Bayesian network of classifiers approach.
DVB-S2: The Second Generation Standard for Satellite Broad-Band Services (2006)

DVB-S2 is the second-generation specification for satellite broad-band applications, developed by the Digital Video Broadcasting (DVB) Project in 2003. The system is structured as a toolkit to allow the implementation of the following satellite applications: TV and sound broadcasting, interactivity (i.e., Internet access), and professional services, such as TV contribution links and digital satellite news gathering. It has been specified around three concepts: best transmission performance approaching the Shannon limit, total flexibility, and reasonable receiver complexity. Channel coding and modulation are based on more recent developments by the scientific community: low density parity check codes are adopted, combined with QPSK, 8PSK, 16APSK, and 32APSK modulations for the system to work properly on the nonlinear satellite channel. The framing structure allows for maximum flexibility in a versatile system and also synchronization in worst case configurations (low signal-to-noise ratios). Adaptive coding and modulation, when used in one-to-one links, then allows optimization of the transmission parameters for each individual user,dependant on path conditions. Backward-compatible modes are also available,allowing existing DVB-S integrated receivers-decoders to continue working during the transitional period. The paper provides a tutorial overview of the DVB-S2 system, describing its main features and performance in various scenarios and applications.
Health Monitoring of a Helicopter Rotor in Forward Flight Using Fuzzy Logic (2002)

A fuzzy logic system is developed for helicopter rotor system fault isolation. Inputs to the fuzzy logic system are measurement deviations of blade bending and torsion response and vibration from a good undamaged helicopter rotor. The rotor system measurements used are flap and lag bending tip deflections, elastic twist deflection at the tip, and three forces and three moments at the rotor hub. The fuzzy logic system uses rules developed from an aeroelastic model of the helicopter rotor with implanted faults to isolate the fault while accounting for uncertainty in the measurements. The faults modeled include moisture absorption, loss of trim mass, damaged lag damper, damaged pitch control system, misadjusted pitch link, and damaged flap. Tests with simulated data show that the fuzzy system isolates rotor system faults with an accuracy of about 90-100%. Furthermore, the fuzzy system is robust and gives excellent results, even when some measurements are not available. A rule-based expert system based on similar rules from the aeroelastic model performs much more poorly than the fuzzy system in the presence of high levels of uncertainty.
A protease inhibitor blocks SOS functions in Escherichia coli: antipain prevents lambda repressor inactivation, ultraviolet mutagenesis, and filamentous growth. (1977)

Inhibition of DNA synthesis in E. coli by treatment with carcinogenic and mutagenic agents results in the coordinate expression of a group of diverse functions (SOS functions) including lambda prophage induction, filamentous growth, and an error-prone DNA repair activity (SOS repair) believed to be responsible for ultraviolet mutagenesis. It has been proposed that this SOS induction proceeds via irreversible proteolytic inactivation of repressor(s) for SOS functions. To test this hypothesis, we investigated the effect of a protease inhibitor, antipain [(1-carboxy-2-phenylethyl)carbamoyl-L-arginyl-L-valylargininal], on SOS induction. We found that 0.5 mM antipain (which has no effect on cell growth, overall RNA and protein synthesis, or induction of beta-galactosidase) drastically decreases mutagenesis. Antipain also blocks expression of thermally induced mutator activity (another manifestation of SOS repair) and filamentous growth in a tif-1 mutant that expresses SOS functions at 42 degrees without inhibition of DNA synthesis or detectable DNA damage. Furthermore, antipain inhibits thermal induction of lambda prophage in the tif-1 mutant without affecting the kinetics of thermal induction of lambdacI857 prophage. This lambda mutant codes a temperature-sensitive repressor that is directly destroyed by heat and does not require the SOS induction pathway for inactivation at 42 degrees. From our results we conclude that antipain inhibits lambda prophage induction by blocking proteolytic inactivation of lambda repressor and that it inhibits the induction or expression of SOS repair and filamentous growth. Our results suggest a role for proteolytic cleavage in the regulation of SOS functions.
Stabilization of percutaneous catheters (1982)

Stabilization of percutaneous cathetersRB Shoenfeld, D Lecky, EJ Ring, GK McLean and DB FreimanAudio Available | Share