gebhart/patrepeval huggingface dataset:
Transmission Network Equivalents for Electromagnetic Transients Studies (1983)

In electromagnetic transients studies, only a limited part of a transmission system can be modelled in detail. The remaining parts of the system have to be reduced to equivalents. Simple equivalents which reproduce the network's response at few frequency points can introduce significant errors into the calculated transients. A method to generate network equivalents from the frequency response of its admittance has been developed. The equivalents are in the form of lumped parameter circuits, have a simple structure and reproduce the network's behaviour over a wide frequency range. The developed method was used to generate an equivalent for a sample system. Voltage transients due to an energization of a transmission line from that sample system were calculated. The results of calculations with the full system representation and the developed equivalent showed a good agreement.
Co2(CO)8-mediated Endo Mode Cyclization of Epoxy-alcohol: Synthesis of 2-Ethynyl-3-hydroxy-2-methyltetrahydropyran and 2-Ethynyl-3-hydroxy-3-methyltetrahydropyran Derivatives. (2001)

Successive treatment of 4,5-epoxy-5-methyl-7-trimethylsilyl-6-heptyne-1-ol with Co2(CO)8 at 0 degrees C and a catalytic amount of BF3 x OEt2 at -78 degrees C gave the tetrahydropyran derivatives with the cobalt-complexed moiety. Similarly 4,5-epoxy-4-methyl-7-trimethylsilyl-6-heptyne-1-ol underwent ring closure under the above conditions to provide the corresponding tetrahydropyran derivatives. The preferential endo mode cyclization over the exo one was observed in these experiments.
ADRENOCORTICOSTEROID PRODUCTION OF FOETAL SHEEP NEAR TERM (1964)

Pregnant Merino sheep, about 1–3 weeks from term, were used. The sheep, aged about 3–4 yr., were obtained from Glenthorne Experimental Station near Adelaide, where they had been feeding on an improved mixed pasture. Sodium pentobarbitone (Abbott) was used for anaesthesia. Glucose-saline (5% glucose in 0·9% NaCl solution) was given i.v. as required. Lambs were removed by caesarian section, placed on a warm tray and covered with warm cloths. The umbilical cord was very carefully handled to avoid interference with the circulation and kept warm and moist with saline. Heparin was administered i.v. through a jugular vein. After cannulation, following the method of Bush & Ferguson (1953), left adrenal venous blood was collected in a measuring cylinder which was kept in packed ice. Timed samples of blood were centrifuged and the plasma stored deep-frozen for analysis. At the end of the collection period, 1–2 hr., a blood sample was taken
Assessing the electrical and mechanical integrity of composite insulators prior to live working (2002)

Many electric power utilities routinely employ composite or nonceramic insulators (NCI) on overhead transmission lines. NCI offer numerous advantages, including low weight and ease of handling, features that are important for live working and replacement of NCI using live working procedures. An essential requirement for ensuring worker safety when performing live work with NCI is to confirm the short-term (i.e., for the duration of the work) electrical and mechanical integrity of both the installed and the replacement NCI. Unfortunately, there are no simple methods of testing the integrity of either installed or replacement NCI prior to executing live work. This has caused many utilities to curtail live work with NCI, and in some cases utilities have even decided not to employ NCI because their integrity in service could not be verified. This paper reports on a project conducted by EPRI. To assess defects in NCI that could create unsafe conditions for live working, i.e., defects that can cause electrical and mechanical failure during live work. NCI defects were categorized and analyzed in terms of their likelihood to cause catastrophic failure during live work. The ability of current NCI evaluation techniques to detect defects is assessed and detection techniques are discussed.
Training of the exchange-bias effect: A simple analytic approach (2004)

Training of the exchange bias effect in antiferro-/ferromagnetic heterostructures is considered in the theoretical framework of spin configurational relaxation, which is activated through consecutively cycled hysteresis loops. The corresponding exchange bias fields, ${\ensuremath{\mu}}_{0}{H}_{\text{EB}}(n)$, reveal relaxation from the initial state, $n=1$, of high antiferromagnetic interface magnetization to the equilibrium state of reduced magnetization in the limit of large $n$. The evolution of ${\ensuremath{\mu}}_{0}{H}_{\text{EB}}$ vs $n$ is calculated with the help of a discretized Landau-Khalatnikov equation, where the continuous time parameter is replaced by the loop index $n$. The result reveals the origin of the well established but hitherto unexplained power-law decay of ${\ensuremath{\mu}}_{0}{H}_{\text{EB}}(n)$ for $n>1$. Moreover, in contrast with the breakdown of the power-law behavior at $n=1$, the relaxation approach describes the training effect for $n\ensuremath{\geqslant}1$. The full capability of the theory is explored in comparison with experimental results obtained recently on a $\mathrm{NiO}(001)∕\mathrm{Fe}(110)$ heterostructure.
19F-MRT der Lunge: erste Erfahrungen mit Hexafluoroethan (C2F6) (2005)

Ziele: Trotz substanzieller Fortschritte der letzten Jahre ist die Bildqualität der 19F-MRT der Lunge noch insuffizient im Hinblick auf die Anwendung in der klinischen Forschung. Eine wesentliche Strategie zur Optimierung des Signal-zu-Rausch-Verhältnisses (SNR) pro Messzeit bestand bislang im Einsatz eines Fluorgases geringer Relaxationszeiten (T1,T2), wie z.B. SF6, wodurch kurze Repetitionszeiten (realisiert u.a. durch hohe Empfängerbandbreiten) und hohe Akquisitionszahlen ermöglicht wurden. Das Ziel der vorliegenden Studie war die Optimierung des SNR durch den Einsatz einer niedrigen Bandbreite und C2F6, eines Fluorgases mit hohem T1. Methode: Dynamische und statische Aufnahmen wurden an zwei narkotisierten Schweinen mittels 2D-FLASH-Sequenz (TR/TE/NEX/a=4,05 ms/1,85 ms/1;3;10;100/40°) bei 1,5 T, einer Rohdatenmatrix von 64×128 und einer Bandbreite von 488Hz/Pixel während, bzw. nach Einwaschen von 30%O2–70%-Fluorgasgemischen (C2F6 und SF6) aufgenommen. Dynamische Messungen erfolgten mit 2s Messzeit, statische bei 260 ms, 780 ms und 23s. Ergebnis: Für die dynamischen Messungen mit C2F6 ergab sich ein etwa 3-faches SNR pro Messzeit im Vergleich zu SF6. Erstmals waren Aufnahmen von 260 ms Messzeit mit akzeptablem SNR mit C2F6 möglich. Bei gleicher Messzeit wurde bei SF6 kein Signal aus der Lunge beobachtet. Schlussfolgerung: Der Einsatz von C2F6 führt zu substanzieller Bildverbesserung. Das um ca. den Faktor 5 größere T1 von C2F6 bewirkt bei niedriger Bandbreite eine signifikante Verbesserung des SNR im Vergleich zu SF6.
Inverse Scattering in the Multiple Scattering Regime Using Different Gradient Approximations (2017)

We describe a linearized inverse method, based on the iterative minimization of a cost functional, for reconstructing the permittivity of a target from scattered far-field in the multiple scattering regime. We show that accounting for multiple scattering in the calculation of the gradients of the cost functional ameliorates significantly the outcome of the reconstruction.
Model identification of the primary circuit at the Paks nuclear power plant (2007)

Based on a simple process model of the primary circuit in physical coordinates, model parameter estimation has been performed on a unit of the Paks Nuclear Power Plant using measured transient data. The dynamic model is hybrid and nonlinear in its parameters and variables, therefore an estimation strategy based on the decomposition of the system has been applied. The estimated parameters fit well to their expected physical range, and the overall system response has also been reproduced in a satisfactory manner.
KiSS-1, a Novel Human Malignant Melanoma Metastasis-Suppressor Gene (1996)

KiSS-1 may be a useful marker for distinguishing metastatic melanomas from nonmetastatic melanomas.
ChemInform Abstract: STEREOCHEMISTRY OF CYCLIC COMPOUNDS. I. SYNTHESIS AND CONFIGURATIONAL ASSIGNMENT OF DIASTEREOMERIC 2,4‐DIOXASPIRO(5.5)UNDEC‐8‐ENES (1980)

Abstract Diels‐Alder‐Reaktion der Butadiene (I) mit Acrolein (II) liefert die Cycloaddukte (III), aus denen durch alkalische Aldolkondensation mit Formaldehyd und anschließende cross‐Cannizzaro‐ Reaktion die 1,1‐Bis‐hydroxymethyl‐Derivate (IV) erhalten werden.
Highly Efficient And Noncontact Vibrothermography Via Local Defect Resonance (2015)

A frequency match between the driving ultrasonic wave and characteristic frequency of a defect provides an efficient energy pumping from the wave directly into the defect (Local Defect Resonance (LDR)). Due to a strong resonance amplification of the local vibrations, the LDR-driven defects exhibit a high-Q thermal response and enable to implement frequency-selective thermosonic imaging with an opportunity to distinguish between different defects by changing the driving frequency. The LDR-thermosonics requires much lower acoustic power to activate defects that makes it possible to avoid high-power ultrasonic instrumentation and even proceed to a remote ultrasonic thermography by using air-coupled ultrasonic excitation.
Synthesis and preliminary evaluation of the fredericamycin A ABCDE ring system (1991)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and preliminary evaluation of the fredericamycin A ABCDE ring systemDale L. Boger and Irina C. JacobsonCite this: J. Org. Chem. 1991, 56, 6, 2115–2122Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991https://pubs.acs.org/doi/10.1021/jo00006a029https://doi.org/10.1021/jo00006a029research-articleACS PublicationsRequest reuse permissionsArticle Views611Altmetric-Citations38LEARN 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
Channel Agnostic End-to-End Learning Based Communication Systems with Conditional GAN (2018)

In this article, we use deep neural networks (DNNs) to develop an end-to-end wireless communication system, in which DNNs are employed for all signal-related functionalities, including encoding, decoding, modulation, and equalization. However, accurate instantaneous channel transfer function, i.e., the channel state information (CSI), is necessary to compute the gradient of the DNN representing. In many communication systems, the channel transfer function is hard to obtain in advance and varies with time and location. In this article, this constraint is released by developing a channel agnostic end-to-end system that does not rely on any prior information about the channel. We use a conditional generative adversarial net (GAN) to represent the channel effects, where the encoded signal of the transmitter will serve as the conditioning information. In addition, in order to obtain accurate channel state information for signal detection at the receiver, the received signal corresponding to the pilot data is added as a part of the conditioning information. From the simulation results, the proposed method is effective on additive white Gaussian noise (AWGN) and Rayleigh fading channels, which opens a new door for building data-driven communication systems.
Anti-tyrosinase, antioxidant and UV-protective agents obtained from natural sources: A high-throughput bioguided approach (2014)

Tyrosinase is regarded as a target enzyme in skin-whitening and in therapeutic interventions for dermatological disorders associated with melanin hyperpigmentation. Abnormal melanin pigments are an aesthetic problem prevalent in middle-aged and elderly individuals [1], but may also occur upon UV radiation [2]. Skin ageing on the other hand, is associated with free radical formation and UV light exposure through activation of the reactive oxygen species (ROS) system [3]. Since many known agents have been proven toxic [4], tyrosinase inhibitors and antioxidant compounds from natural sources are in the center of research interest for the development of cosmeceutical products.This project with the acronym AGROCOS (FP7) aimed to carry to the stage of development candidates, plant derived small molecules with skin-whitening, antioxidant and UV-protective properties. 460 natural compounds with structurally diverse scaffolds and decoration patterns were evaluated for the above mentioned properties. The screens addressed radical scavenging properties, protection against reactive oxygen species (ROS) and UV-induced cell death in cell-based assays, and anti-tyrosinase properties. Based on this screening, a collection of 3600 extracts from biodiversity hotspots plants was emerged and screened on the same targets. 31 most antioxidant extracts, including many representatives from Myrtaceae and Fabaceae families, and 13 extracts with anti-tyrosinase properties, such as Glycyrrhiza glabra and Caesalpinia schlechteri were prioritized for an HPLC-based bioguided microfractionation. Active fractions were submitted to a final purification of bioactive compounds.This unique extract library combined with a high-throughput approach proved to be an efficient tool for the discovery of natural agents with antioxidant, UV-protective and anti-tyrosinase properties.
Synthesis of a Crushed Fullerene C60H24 through Sixfold Palladium‐Catalyzed Arylation (2016)

The synthesis of a new <i>C</i><sub>3<i>v</i></sub> -symmetric crushed fullerene C<sub>60</sub>H<sub>24</sub> (<b>5</b>) has been accomplished in three steps from truxene through sixfold palladium-catalyzed intramolecular arylation of a <i>syn</i>-trialkylated truxene precursor. Laser irradiation of <b>5</b> induces cyclodehydrogenation processes that result in the formation of C<sub>60</sub>, as detected by LDI-MS.
NEUROMUSCULAR DISEASES: CHILDREN, EPIDEMIOLOGIC, ARGENTINIEN (2006)

Objectives: To present a preliminary Register of PNMD, to identify and follow up the PNMD (Pediatrics neuromuscular disorders) with multicenter participation. To study their origins and relationship with the migratory currents.
Evaluation of <I>Cuphea</I> as a Rotation Crop for Control of Western Corn Rootworm (Coleoptera: Chrysomelidae) (2005)

The ability to prevent significant root feeding damage to corn, Zea mays L., by the western corn rootworm, Diabrotica virgifera virgifera LeConte, by crop rotation with soybean, Glycine max (L.) Merr., has been lost in portions of the Corn Belt because this pest has adapted to laying eggs in soybean fields. Cuphea spp. has been proposed as a new broadleaf crop that may provide an undesirable habitat for rootworm adults because of its sticky surface and therefore may reduce or prevent oviposition in these fields. A 4-yr study (1 yr to establish seven rotation programs followed by 3 yr of evaluation) was conducted to determine whether crop rotation with Cuphea would provide cultural control of corn rootworm. In support of Cuphea as a rotation crop, fewer beetles were captured by sticky traps in plots of Cuphea over the 4 yr of this study compared with traps in corn and soybean, suggesting that fewer eggs may be laid in plots planted to Cuphea. Also, corn grown after Cuphea was significantly taller during vegetative growth, had significantly lower root damage ratings for 2 of 3 yr, and had significantly higher yields for 2 of 3 yr compared with continuous corn plots. In contrast to these benefits, growing Cuphea did not prevent economic damage to subsequent corn crops as indicated by root damage ratings > 3.0 recorded for corn plants in plots rotated from Cuphea, and sticky trap catches that exceeded the threshold of five beetles trap(-1) day(-1). Beetle emergence from corn plots rotated from Cuphea was significantly lower, not different and significantly higher compared with beetle emergence from continuous corn plots for 2002, 2003 and 2004 growing seasons, respectively. A high number of beetles were captured by emergence cages in plots planted to Cuphea, indicating that rootworm larvae may be capable of completing larval development by feeding on roots of Cuphea, although peak emergence lagged approximately 4 wk behind peak emergence from corn. Based on these data, it is unlikely that crop rotation with Cuphea will provide consistent, economical, cultural control of corn rootworm.
Characterization of Unbleached Kraft Pulps by Enzymatic Treatment, Potentiometric Titration and Polyelectrolyte Adsorption (1996)

Article Characterization of Unbleached Kraft Pulps by Enzymatic Treatment, Potentiometric Titration and Polyelectrolyte Adsorption was published on January 1, 1996 in the journal Holzforschung (volume 50, issue 3).
Iridium Half-Sandwich Complexes with Di- and Tridentate Bis(pyridylimino)isoindolato Ligands: Stoichiometric and Catalytic Reactivity (2015)

A series of κ2-(N,N)-coordinated bis(2-pyridylimino)isoindolato (BPI) complexes [Cp*Ir(BPI)Cl], which possess “three-legged piano-stool” structures, with the iridium atom being coordinated by the Cp* ligand 2 × N and Cl, were prepared via deprotonation of the BPIH ligands with either potassium hydride or LDA and subsequent reaction with [Cp*IrCl2]2 in THF. Cationic complexes [Cp*Ir(BPI)]+ containing κ3-(N,N,N)-coordinated BPI ligands were prepared as well as complexes with bidentate-coordinated BPI ligands, where the chloride ligand was substituted by either neutral or anionic ligands. Substitution in the ortho-position of the PBI ligands led to the formation of cycloiridated κ3-(N,N,C) species. Upon substitution of the anionic ligand by triphenylphosphine, a product was obtained with a hitherto unobserved κ2-(N,N) coordination of oMe-BPI to the metal center via the deprotonated nitrogen atom of the isoindole unit and one of the imine nitrogen atoms of the BPI ligand. A series of (para-cymene) osmium half-sandwich complexes with analogous structures and reactivities to their isoelectronic Cp*Ir(BPI) congeners were also prepared. Finally, it has been demonstrated that both Ir and Os complexes are catalytically active in the transfer hydrogenation of various ketones and imines.
Isolated renal Hydatid cyst:Diagnosed as an Incidentaloma during Pregnancy (2011)

A twenty five year old second gravid woman was referred with a cystic mass in the right lumbar region. The cystic mass was diagnosed by routine ultrasound done for fetal growth. Antenatal period was otherwise uneventful. The patient had vaginal delivery at 38 weeks. She was evaluated in the postpartum period and was diagnosed to have renal hydatid cyst intraoperatively. Postoperative period was uneventful.
Microstructural Modification for Injection Molded Ti-6Al-4V Alloys by Addition of Mo Powder (2006)

The metal injection molding process was applied to produce the microstructual modified Ti-6Al-4V alloy compacts using Ti, 60Al-40V alloy and fine Mo powders. To improve the tensile properties of the compacts with modification of microstructure, the effect of Mo content and sintering conditions on the microstructures and mechanical properties of the sintered compacts were investigated, and the characteristic X-ray images were also measured by means of electron probe micro analyzer to estimate the distribution of added Mo.The microstructures of sintered compacts were consisted of acicular α and intergranular β phases and the acicular α phase became fine with increasing Mo contents. The tensile strength of sintered compacts increased with increasing Mo contents. Although the elongation of sintered compacts slightly reduced with increasing Mo contents, these sintered compacts showed excellent ductility above 10% of elongation up to 4mass% of Mo contents. Eventually, the mechanical properties of the sintered compacts added 4mass% of Mo were improved to be 970MPa with 13.8% of elongation due to the fine microstructure.
Expression of <i>Saccharomyces cerevisiae</i> inorganic pyrophosphatase in <i>Escherichia coli</i> (1993)

A segment of DNA encoding Saccharomyces cerevisiae inorganic pyrophosphatase (ppa gene) was amplified by the polymerase chain reaction. The pSCH1 and pSCB6 plasmids containing the ppa gene were obtained. Transformation of the E. coli BL21 strain with the resulting recombinant plasmids and selection of clones having extremely high expression of inorganic pyrophosphatase (PPase) were carried out. Superproduction of recombinant S. cerevisiae PPase up to 50% of the total bacterial protein was achieved. The enzyme was readily obtained and purified to homogeneity with the use of a simple purification technique. This work is the first description of S. cerevisiae PPase superproducer creation.
The frequency of double‐positive thymocytes expressing an αβ TCR clonotype regulates peripheral CD4 T cell compartment homeostasis (2005)

The present study aimed to determine whether the frequency of double positive (DP) thymocytes expressing alphabeta T-cell receptor (TCR) clonotypes at the time of selection regulates peripheral CD4 T-cell compartment size. Scid recipients were inoculated with various ratios of TCR Calpha(0/0) and wild-type bone marrow (BM) stem cells. Increasing the frequency of TCR Calpha(0/0) thymocytes at steady-state introduced a graded decrease in the maturation probability of the total DP thymocyte pool. At 12-14 weeks following BM inoculation, the frequency of TCR Calpha(0/0) DP thymocytes was inversely correlated with that of CD4 single positive (SP) thymocytes. Notwithstanding, a decreased frequency of wild-type DP thymocytes led to a marked increase in their transit efficiency from the DP to SP compartments. The frequency-dependent increase in thymocyte transit efficiency was associated with a CD4 SP cell surface phenotype indicative of increased antigenic experience. Importantly, the frequency of DP thymocytes capable of expressing TCR clonotypes dictated the steady-state size of the peripheral CD4 T cell compartment and its potential for homeostatic proliferation. Collectively, these results indicate that the efficiency of DP to CD4 SP transit is a frequency dependent process, which determines (1) the steady-state size of the peripheral T cell compartment and (2) the threshold for homeostatic expansion of peripheral CD4 T cells.