gebhart/patrepeval huggingface dataset:
Transient potential distribution on stress grading system of rotating machines under repetitive impulse voltages (2014)

For advanced designing of end-winding insulation system of rotating machines, the experimental information on the potential distribution on such stress grading system under the application of PWM voltage is essential. In this paper, the potential distributions on the stress grading system of a model coil under various shape of voltages such as 50Hz sinusoidal ac voltage, bipolar and unipolar 1kHz-square pulse voltages, repetitive impulses of 250ns in their rise-time, were measured by a Pockels sensor which can respond up to several GHz. The surface temperature on the model coil was also observed by an infrared camera. When the repetitive impulses were applied to the model coil, the potential gradient became high on the corona armor tape (CAT) closer to the stator core during the wave-front of the impulse, and on the stress grading tape (SGT) during the wave-tail of the impulse. This phenomenon can be explained by a simplified RC-ladder equivalent circuit, which has low pass filtering characteristics of around 1 MHz in cut off frequency. In addition, the measured temperature distribution on model coil was compared with the computed distribution of the power dissipation. The influence of dc component in applied voltage on the potential and temperature distributions was experimentally confirmed to be little.
Inductance of planar rectangular-spiral strip conductors for low-profile inductors (2003)

Two methods are presented for calculating the inductance of planar rectangular spirals. The first method assumes current flows only in the exact center of the conductor. The second method is based on uniform current distribution across the conductor width, and results in significant improvements in the calculated value of the inductance. The effect of introducing a magnetic core is also studied. The calculated values of inductance from both methods are compared with laboratory measurements, and the accuracy of the methods is demonstrated.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
ChemInform Abstract: Intramolecular Transaminations of Enaminones: A Synthesis of Fused, Polycyclic, N‐Aryl Pyridones. (1993)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Hip Biomechanics / Farid Amirouche, Mark Gonzalez, Luke Aram (2008)

In the late 1980s, a group of engineers and surgeons at Case Western led by Davy implanted a total hip with a load cell, battery, and transmitter built into the neck of an artiﬁcial hip.[4] One month after surgery, they recorded joint forces different than those previously calculated. During single leg stance, the hip force was 1.0 times body weight, more than three times that calculated by Maquet. During single leg stance, 2.1 times the body weight was recorded, 30% less than Maquet (Table 1).
Self-Heating Temperature and AC Hysteresis of Magnetic Iron Oxide Nanoparticles and Their Dependence on Secondary Particle Size (2012)

Magnetic nanoparticles are expected to be used as hyperthermia agents. The mechanism of self-heating of the magnetic nanoparticles under an ac magnetic field is different according to their size. In this study, the temperature rise for the ac/dc hysteresis loops of magnetic nanoparticles were evaluated to clarify the contribution of the Néel and Brownian relaxations to heat dissipation. The samples were dextran-coated magnetic iron oxide nanoparticles of different hydrodynamic diameters (40, 54, and 86 nm), but the same primary diameter of 10 nm. From these diameters, the peak frequencies for the Brownian and Néel relaxations were calculated. The Néel relaxation time, determined by the primary particle size, is much shorter than the Brownian relaxation time for these samples. Although the Néel relaxation is dominant, the self-heating temperature rise of the 86 nm sample was higher than that of the 40 and 54 nm samples. These results suggest that the effect of the magnetic interaction between the nanoparticles depends on the hydrodynamic diameter.
Mixed carbonyl-isocyanide and carbonyl-nitrile complexes derived from the reactions of the multiply bonded dirhenium(II) complexes Re2X4(dppm)2(CO) (X = chloro or bromo-; dppm = Ph2PCH2PPh2). The structural characterization of Cl2Re(.mu.-Cl)(.mu.-dppm)2ReCl(CO) and Cl2Re(.mu.-Cl)(.mu.-CO)(.mu.-dppm)2ReCl(CNxylyl) (1986)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixed carbonyl-isocyanide and carbonyl-nitrile complexes derived from the reactions of the multiply bonded dirhenium(II) complexes Re2X4(dppm)2(CO) (X = chloro or bromo-; dppm = Ph2PCH2PPh2). The structural characterization of Cl2Re(.mu.-Cl)(.mu.-dppm)2ReCl(CO) and Cl2Re(.mu.-Cl)(.mu.-CO)(.mu.-dppm)2ReCl(CNxylyl)F. Albert. Cotton, Kim R. Dunbar, Andrew C. Price, Willi. Schwotzer, and Richard A. WaltonCite this: J. Am. Chem. Soc. 1986, 108, 16, 4843–4850Publication Date (Print):August 1, 1986Publication History Published online1 May 2002Published inissue 1 August 1986https://pubs.acs.org/doi/10.1021/ja00276a023https://doi.org/10.1021/ja00276a023research-articleACS PublicationsRequest reuse permissionsArticle Views91Altmetric-Citations28LEARN 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
Generación de primos: una perspectiva computacional (2010)

Parcialmente financiado por el Ministerio
de Ciencia e Innovacion mediante el proyecto TEC2009-13964-C04-02, y el Ministerio de Industria, Turismo y Comercio, en colaboracion con CDTI y Telefonica I+D mediante el proyecto Segur@ CENIT-2007 2004.
Email alias detection using social network analysis (2005)

This research addresses the problem of correctly relating aliases that belong to the same entity. Previous approaches focused on natural language processing and structured data, whereas in this research we analyze the local association, or "social" network in which aliases reside. The network is constructed from email data mined from the Internet. Links in the network represent web pages on which two email addresses are collocated. The problem is defined as given social network S, constructed from email address collocations, and an email address E, identify any aliases for E that also appear in S. The alias detection methods are evaluated on a data set of over 14,000 University X email addresses for which ground truth relations are known. The results are reported as partial lists of k choices for possible aliases, ranked by predicted relational strength within the network. Given a source email address, a portion of all email addresses, 2%, are correctly linked to another alias that corresponds to the same entity by best rank, which is significantly better than random (0.007%) and a geodesic distance (1%) baseline prediction. Correct linkages increase to 15% and 30% within top-10 (0.07% of all emails) and top-100 rank lists (0.7% of all emails), respectively.
Radionuclide venography. Significance of delayed washout: visualization of the saphenous system. [/sup 99m/Tc tracer technique] (1976)

Venograms were obtained on dogs in which venous thrombosis had been surgically induced. Radionuclide venograms, obtained after injection of /sup 99m/Tc-labeled microspheres of macroaggregated albumin, showed decreased radioactivity over the areas of venous thrombosis and increased radioactivity over areas of venous stasis. Scintigrams of veins excised after an injection of labeled particles did not delineate thrombi, areas of crush-injured vein, or the venous valves. Delay in the washout of radioactivity on a venogram indicates stasis due to impeded venous flow in the area of thrombosis. A modified technique was developed to obtain simultaneous images of the superficial and deep veins of the leg. Visualization of the superficial veins not only permits detection of superficial abnormalities, but also assists interpretation of the venographic observations of the deep veins.
Smart Signs: Showing the way in Smart Surroundings (2006)

Abstract. This paper presents a context-aware guidance and messaging system for large buildings and surrounding venues. Smart Signs are a new type of electronic door- and way-sign based on wireless sensor networks. Smart Signs present in-situ personalized guidance and messages, are ubiquitous, and easy to understand. They combine the easiness of use of traditional static signs with the flexibility and reactiveness of navigation systems. The Smart Signs system uses context information such as user’s mobility limitations, the weather, and possible emergency situations to improve guidance and messaging. Minimal infrastructure requirements and a simple deployment tool make it feasible to easily deploy a Smart Signs system on demand. An important design issue of the Smart Signs system is privacy: the system secures communication links, does not track users, allow almost complete anonymous use, and prevent the system to be used as a tool for spying on users. 1
Analog Sensor Based Testing of Phase-Locked Loop Dynamic Performance Parameters (2013)

Phase-locked loops are used to synthesize frequency sources for RF conversion and IO clocks for data synchronization, and serve as core building blocks for communication systems. Consequently, testing of PLL loop performance is critical for guaranteeing the reliability of the underlying communication systems. In this paper, a testing method based on loop triggering and use of low-cost built-in analog sensors (small number of transistors) to accurately predict phase-locked loop dynamic parameters is proposed. The sensors are designed in such a way that the sensor responses show strong statistical correlation with the PLL parameters being tested. Accordingly, supervised learners are "trained" to predict the required PLL parameters from the observed sensor response. A PLL is designed and simulated in closed loop over PVT corners in order to validate the testing mechanism. Parameters including charge pump current, VCO gain, bandwidth, phase margin, and locking time are predicted accurately and concurrently over these PVT corners to prove the viability of the proposed test method.
Substitution Reactions Which Proceed <i>via</i> Radical Anion Intermediates (1975)

Abstract A new type of substition process at a saturated carbon atom is described. These reactions, which proceed via a chain sequence in which radical anions and free radicals are intermediates, are noteworthy for providing novel and powerful means of synthesis: they occur readily under mild conditions, they give excellent yields of pure products, and, in contrast to S N 2 displacements, they are rather insensitive to steric hindrance. As a consequence, radical anion processes are especially valuable for the preparation of highly branched structures. Many inorganic and organic anions readily enter into these displacements and, indeed, amines are also effective. Systems which undergo substitutions via this electron transfer mechanism include benzylic, cumylic, strictly aliphatic, and heterocyclic molecules. It is of interest that a number of groups which do not behave as leaving groups in S N 2 displacements are readily displaced at room temperature from a satureted carbon atom via the radical anion‐free radical pathway, e.g. , nitro, azide, sulfone, and ether groups.
[Improvement of dose distributions at NIRS's 70 MeV proton eye treatment beam course] (2000)

In order to improve dose distributions at NIRS's 70 MeV proton eye treatment beam course, we introduced finer bar ridge filters, and examined the effects of range compensators. The pitch of new bar ridge filters was 5mm in contrast to 15mm pitch of old ones. A NC-machine recently available enabled this refinement. The spread out Bragg peak (SOBP) widths were 10, 15, 20 and 30 mm. The new ridge filters improved the field uniformity considerably. In the ridge filter design we assumed parallel beam condition in which the mono-energetic proton should proceed in parallel with the central axis, and bar ridges only changes the proton ranges. We searched empirically for the optimum wobbler radius in view of field flatness and depth dose distribution. Range shifter and compensator did not affect the field flatness and depth dose distribution at the optimum condition thus searched. We measured dose distribution in a phantom using a compensator of stairs-shape, which fairly modulated the beam. A 50% isodose line almost coincided with the compensator shape, and these results suggested that improvements of dose distributions should be possible using compensators. However width between 50% and 80% isodose lines depended on the thickness of phantom. This might be due to scattering in the compensator and suggests that it is necessary to calculate dose distribution taking account of such effects.
Protein synthesis and transcriptional inhibitors control N-methyl-N'-nitro-N-nitrosoguanidine-induced levels of APC mRNA in a p53-dependent manner. (1998)

In the present study, we show that treatment of wild-type (p53+/+) mouse embryonic fibroblast (MEF) cells with a DNA-alkylating agent, N-methyl-N'-nitro-N-nitro-soguanidine (MNNG), resulted in increased levels of adenomatous polyposis coli (APC) mRNA compared to p53 gene-knocked out (p53-/-) MEF cells, indicating that p53 is required for APC expression after alkylation damage. By using HCT-116 colon cancer cells (containing wild-type p53 gene) or p53-/- MEF cells transfected with a pCMV-p53 overexpression plasmid [p53-/-(CMV-p53)], we show that p53 is a labile factor for APC gene expression, and that pretreating HCT-116 cells with a protein synthesis inhibitor, cycloheximide (CHX), inhibited MNNG-induced APC mRNA levels by inhibiting p53 protein synthesis. The effect of CHX on p53 protein synthesis was reversible, as the withdrawal of CHX permitted p53 protein synthesis to resume with a concomitant increase in APC mRNA levels after MNNG treatment. To examine whether p53 regulates APC gene expression at the transcriptional level, we treated HCT-116 or p53-/-(CMV-p53) MEF cells with 5,6-dichloro-1-beta-D-ribofuranosylbenzamidazole (DRB; a transcriptional inhibitor), before the MNNG treatment. Although treatment of cells with DRB resulted in increased p53 protein levels, that the APC mRNA levels were decreased suggests that p53 may enhance APC gene expression upstream of the transcriptional machinery where DRB interacts. That the withdrawal of DRB, and subsequent MNNG treatment, increased the level of APC mRNA indicated that the binding of DRB to the transcriptional machinery was reversible.
Model Predictive Speed Control of Electrical Machines (2014)

Model predictive control is a conceptually different control technique which offers a high flexibility to control different power electronics topologies and to manage several control objectives, without adding significant complexity to the system. MPC has demonstrated to be easier to implement and understand than classical speed control techniques such as FOC and DTC providing a high performance control of AC machines. The advances in modern control theory and microprocessors technology, during the last decades, have made it possible to apply MPC to power electronics and drives. The application of model predictive control to power electronics devices is straightforward, due to the availability of precise models and a finite number of control inputs given by the converter switching states. MPC can dramatically change the way electrical energy is controlled using power semiconductors, and it offers challenging opportunities for research in power electronics and electrical drives.
Identification and Properties of the Messenger RNA Activity in <i>Chlamydomonas reinhardi</i> Coding for the Large Subunit of d-ribulose-1,5-bisphosphate Carboxylase (1977)

Properties of the mRNA coding for the large subunit of ribulose-1,5-bisphosphate carboxylase from Chlamydomonas reinhardi were determined. Large subunit synthesis, directed by RNA from partially purified whole cell extracts, was detected by specific immunoprecipitation of polypeptide products synthesized in a heterologous translation system derived from Escherichia coli. Large subunit synthesis showed sharp RNA concentration dependence in an E. coli translation system, and at optimal RNA concentrations, immunoprecipitable large subunit synthesis accounted for 2% of the total incorporation. Large subunit messenger activity sedimented at 12 to 14S on nondenaturing sucrose gradients and did not bind to oligo(dT)-cellulose suggesting the mRNA is not polyadenylated. The immunoprecipitable products translated in vitro are not complete polypeptide chains, but are smaller peptides identifiable as large subunit fragments by tryptic fingerprint analysis. No immunoprecipitable product was obtained when similar RNA fractions were tested in a wheat germ translation system.
A New Numerical Model to Analyze Stress Distribution of TMJ Disc from 2-D MRI Scans (2012)

From the anatomical and biomechanical points of view, temporomandibular joint (TMJ) is sophisticated bicondylar articulatory complex with great demand on neuromuscular control with a frequency of motion indicated up to 2000 periods per day. This makes the TMJ one of the most frequently exerted joints of the human body and in conjunction with individual uniqueness of this joint places high demand on its design and reliability. Experimental studies concerning the distribution of the loads in the TMJ have been performed on animal models. Numerical modeling provides more understanding of joint physiology and pathogenesis of the joint diseases. Magnetic resonance imaging (MRI) has replaced computed tomography (CT) and arthrography as the primary modality in the evaluation of the TMJ. At this study a new numerical method are used to build 3-D model of TMJ from 2-D MRI scans and applied some stress-strain analysis to validate this model for different normal and abnormal patients. These models are based on multi-object reconstruction technique and tetrahedral elements building
.BETA.-Citryl-L-glutamate Is an Endogenous Iron Chelator That Occurs Naturally in the Developing Brain (2010)

The compound beta-citryl-L-glutamate (beta-CG) was initially isolated from developing brains, while it has also been found in high concentrations in testes and eyes. However, its functional roles are unclear. To evaluate its coordination with metal ions, we performed pH titration experiments. The stability constant, logbeta(pqr) for M(p)(beta-CG)(q)H(r) was calculated from pH titration data, which showed that beta-CG forms relatively strong complexes with Fe(III), Cu(II), Fe(II) and Zn(II). beta-CG was also found able to solubilize Fe more effectively from Fe(OH)(2) than from Fe(OH)(3). Therefore, we examined the effects of beta-CG on Fe-dependent reactive oxygen species (ROS)-generating systems, as well as the potential ROS-scavenging activities of beta-CG and metal ion-(beta-CG) complexes. beta-CG inhibited the Fe-dependent degradation of deoxyribose and Fe-dependent damage to DNA or plasmid DNA in a dose-dependent manner, whereas it had no effect on Cu-mediated DNA damage. In addition, thermodynamic data showed that beta-CG in a physiological pH solution is an Fe(II) chelator rather than an Fe(III) chelator. Taken together, these findings suggest that beta-CG is an endogenous low molecular weight Fe chelator.
Cellular sensitization to cis-diamminedichloroplatinum(II) by novel analogues of the protein kinase C activator lyngbyatoxin A. (1991)

Protein kinase C (PKC) has been implicated in enhancing cellular sensitivity to cis-diamminedichloroplatinum(II) (CP). We have synthesized a series of novel analogues of lyngbyatoxin A (7-linalylindolactam V), a natural tumor promoter and a potent activator of PKC, and investigated the effects of these synthetic compounds on PKC activity and the antiproliferative activity of CP. Lyngbyatoxin A was as effective as phorbol esters, such as 12-O-tetradecanoylphorbol-13-acetate, in enhancing the sensitivity of HeLa cells to CP. A 24-h pretreatment of HeLa cells with 1 to 100 nM lyngbyatoxin A caused an approximately 9-fold sensitization to CP. All analogues of lyngbyatoxin A that retained the lactam ring portion of the molecule but contained different hydrophobic substituents at C-7 including indolactam V (ILV), tert-butyl-ILV, or n-hexyl-ILV increased cellular sensitivity to CP in a concentration-dependent manner. Maximum cellular sensitization to CP (9-fold) was seen with 10 nM n-hexyl or tert-butyl compounds, and ILV devoid of any C-7 substitution required higher concentrations (1 microM) for equivalent sensitization. The ability of lyngbyatoxin A analogues to sensitize cells to CP correlated directly with their ability to activate PKC in vitro. Synthetic analogues that lacked the lactam ring structure neither activated PKC nor sensitized cells to CP. The C-9 epi analogue of n-hexyl-ILV was less effective than the corresponding natural stereoisomer in activating PKC as well as sensitizing cells to CP. Exposure of HeLa cells to 100 nM lyngbyatoxin A for 24 h caused a substantial decrease in cellular PKC activity to 20% of the untreated control value, but a similar treatment of cells with n-hexyl- or tert-butyl-ILV led to only a 25% reduction in PKC activity. Concentrations of ILV (e.g. 1 microM) that sensitized HeLa cells to CP caused no down-regulation of PKC. Thus, on the basis of results with these novel lyngbyatoxin A analogues, we conclude that activation but not down-regulation of PKC is necessary for sensitization of HeLa cells to CP.