gebhart/patrepeval huggingface dataset:
Ferrocenyl substituted octakis(dimethylsiloxy)octasilsesquioxanes: a new class of supramolecular organometallic compounds. Synthesis, characterization, and electrochemistry (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerrocenyl substituted octakis(dimethylsiloxy)octasilsesquioxanes: a new class of supramolecular organometallic compounds. Synthesis, characterization, and electrochemistryMoises Moran, Carmen M. Casado, Isabel Cuadrado, and Jose LosadaCite this: Organometallics 1993, 12, 11, 4327–4333Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/om00035a018https://doi.org/10.1021/om00035a018research-articleACS PublicationsRequest reuse permissionsArticle Views549Altmetric-Citations107LEARN 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
Synthesis of a 2,5-Diazabicyclo[2.2.1]heptane-Derived α,β-Diamino Acid (2015)

The synthesis of optically pure (1<i>S</i>,4<i>S</i>)-2,5-diazabicyclo[2.2.1]heptane-1-carboxylic acid starting from easily available ‘chiral pool’ <sc>l</sc>-4-hydroxyproline is reported. A tandem Strecker reaction–intramolecular nucleophilic cyclization (STRINC) sequence was used as the key synthetic step for the first time to prepare a diamino acid. Careful examination of the side products obtained in the STRINC step allowed the suggestion of a mechanistic explanation for the observed facts and optimization the yield of the aminonitrile precursor. The reported scalable synthesis opens the way to use the diamino acid as a branch point in peptides and as a building block in drug discovery.
<tt>On2Vec</tt>: Embedding-based Relation Prediction for Ontology Population (2018)

Populating ontology graphs represents a long-standing problem for the Semantic Web community. Recent advances in translation-based graph embedding methods for populating instance-level knowledge graphs lead to promising new approaching for the ontology population problem. However, unlike instance-level graphs, the majority of relation facts in ontology graphs come with comprehensive semantic relations, which often include the properties of transitivity and symmetry, as well as hierarchical relations. These comprehensive relations are often too complex for existing graph embedding methods, and direct application of such methods is not feasible. Hence, we propose On2Vec, a novel translation-based graph embedding method for ontology population. On2Vec integrates two model components that effectively characterize comprehensive relation facts in ontology graphs. The first is the Component-specific Model that encodes concepts and relations into low-dimensional embedding spaces without a loss of relational properties; the second is the Hierarchy Model that performs focused learning of hierarchical relation facts. Experiments on several well-known ontology graphs demonstrate the promising capabilities of On2Vec in predicting and verifying new relation facts. These promising results also make possible significant improvements in related methods.
An architecture for a wide area distributed system (1996)

Distributed systems provide sharing of resources and information over a computer network. A key design issue that makes these systems attractive is that all aspects related to distribution are transparent to users. Unfortunately, general-purpose wide area distributed systems that allow users to share and manage arbitrary resources in a transparent way hardly exist. In particular, they generally do not take into account the most important properties that characterize wide area systems: 1) A very large number of users and resources, 2) an inherent latency problem caused by the distance between nodes, 3) heterogeneity due to a variety of underlying operating systems and networks, and 4) involvement of multiple administrative organizations.The research described in this paper is part of the Globe Project (Globe stands for GLobal Object Based Environment). The goal of this project is the design and implementation of a wide area distributed system that provides a convenient programming abstraction and full transparency. The main contribution of this paper is the description of a new system for distributed shared objects. In contrast to other systems, the implementation of distribution, consistency, and replication of state is completely encapsulated in a distributed shared object. This allows for object-specific solutions, and provides the right mechanism for building efficient and truly scalable systems.
The use of a minicomputer for on-line control of a taxi fleet (1974)

As a direct data interface between dispatcher and driver, a 4K minicomputer with a very efficient program helps resolve many thorny problems in large fleet dispatching. Data bursts of 300 mS at the beginning of each radio transmission reliably convey the identification and address information with little interference to voice transmissions. The concept of city-wide as opposed to zone coverage is feasible due to the even loading of dispatchers made possible by random access to any channel. Performance objectives of more rapid dispatching, improved load factor on vehicles, and better management are being met, with the result that an early expansion and the addition of other facilities is predicted.
Parametric Airfoils and Wings (1999)

Explicit mathematical functions are used for 2D curve definition for airfoil design. Flowphe-nomena-oriented parameters control geometrical and aerodynamic properties. Airfoil shapes are blended with known analytical section formulae. Generic variable camber wing sections and multicomponent airfoils are generated. For 3D wing definition all parameters are made functions of a third spanwise coordinate. High lift systems are defined kinematically by modelled track gear geometries, translation and rotation in 3D space. Examples for parameter variation in numerical optimization, mechanical adaptation and for unsteady coupling of flow and configuration are presented.
The prevalence of low- and high-level mupirocin resistance in staphylococci from 19 European hospitals (1998)

The topical agent mupirocin plays a crucial role in strategies designed to control outbreaks of methicillin-resistant Staphylococcus aureus. The extent of high- or low-level mupirocin resistance amongst S. aureus from European hospitals is not known. Six hundred and ninety-nine S. aureus and 249 coagulase-negative staphylococci (CNS) derived from blood, hospital-acquired pneumonia or skin and soft tissue infections from 19 European hospitals were tested for susceptibility to mupirocin and oxacillin. Methicillin sensitivity was found in 72% and 32% of S. aureus and CNS, respectively. High-level mupirocin resistance was detected in 1.6% of S. aureus and 5.6% of CNS isolates, while low-level mupirocin resistance was detected in 2.3% of S. aureus and 7.2% of CNS isolates. Amongst S. aureus, methicillin-resistant isolates were twice as likely to have high- or low-level mupirocin resistance. This difference was less pronounced in CNS. No relationship was found between the site of infection and prevalence of mupirocin resistance. High- and low-level mupirocin resistance was detected amongst staphylococci from 10 and 16 of the hospitals studied, respectively. To maintain the relatively low prevalence of mupirocin resistance in Europe amongst both S. aureus and CNS, the prudent use of mupirocin restricted to defined infection control strategies should be emphasized.
AES and XPS Studies of Semi‐Insulating Polycrystalline Silicon (SIPOS) Layers (1979)

Quantitative Auger electron spectroscopy (AES) and x‐ray photoelectron spectroscopy (XPS) have been used to characterize semi‐insulating polycrystalline silicon (SIPOS) layers grown from a mixture of and by chemical vapor deposition. Various values of γ (volumetric ratio of to in the deposition gas stream) were used to produce layers with a wide range of oxygen content. Oxygen concentration values determined by AES and XPS as a function of γ were found to be in reasonable agreement with values determined by electron probe microanalysis. Analyses of the Si 2p binding energy spectra indicate the presence of elemental silicon as well as silicon oxides, predominantly and . Ion sputtering of the SIPOS layers was shown to modify the surface composition from that of the unsputtered surface.
Association between Hypertension and Periodontitis: Possible Mechanisms (2014)

This review is to examine the current literatures on the relationship between periodontitis and hypertension as well as to explore the possible biological pathways underlying the linkage between these health conditions. Hypertension is one of the major risk factors for cardiovascular diseases. Oxidative stress and endothelial dysfunction are among the critical components in the development of hypertension. Inflammation has received much attention recently and may contribute to a pivotal role in hypertension. Periodontitis, a chronic low-grade inflammation of gingival tissue, has been linked to endothelial dysfunction, with blood pressure elevation and increased mortality risk in hypertensive patients. Inflammatory biomarkers are increased in hypertensive patients with periodontitis. Over the years, various researches have been performed to evaluate the involvement of periodontitis in the initiation and progression of hypertension. Many cross-sectional studies documented an association between hypertension and periodontitis. However, more well-designed prospective population trials need to be carried out to ascertain the role of periodontitis in hypertension.
Interaction of medicinals and porous powder. I. Anomalous thermal behavior of porous glass mixtures. (1984)

The molecular properties of benzoic acid, ethyl p-aminobenzoate and benzophenone mixed with porous glass powder were investigated by differential scanning calorimetry (DSC), powder X-ray diffraction, and gas adsorption measurements. The mixtures had anomalous properties as compared with the mixtures with glass beads, that is, (1) a low concentration mixture (about 5%) did not show the melting heat and X-ray diffraction peaks associated with the medicinal crystals, (2) a high concentration mixture (about 20%) showed only a broad endothermic peak at a lower temperature than the melting point, and (3) a higher concentration mixture (more than 40%) showed an endothermic heat effect at the melting point together with the broad peak at a lower temperature. The peak area at the melting point increased with an increase of drug concentration while the broad peak area remained unchanged. Mixing with medicinals caused a decrease of surface area and a change of pore diameter distribution of the porous glass. From these results it was concluded that the medicinals took three phases in the mixture ; phase 1 (crystal structure), phase 2 (disordered structure) and phase 3 (probably adsorbed on the pore walls). The amounts of these phases were calculated from DSC curves.
Comparison of the Effects of Ivabradine and Atenolol on Heart Rate and Echocardiographic Variables of Left Heart Function in Healthy Cats (2011)

Ivabradine is not inferior to atenolol with regard to effects on HR, RPP, LV function, left atrial performance, and clinical tolerance. Clinical studies in cats with hypertrophic cardiomyopathy are needed to validate these findings.
Effects of NaHSO_(3) on nitrogen assimilation enzymes and proline accumulation of wheat seedlings exposed to salinity (2006)

Effects of NaHSO_(3) on nitrogen assimilation enzymes and proline accumulation under salinity were investigated using ordinary wheat cuhivar （Triticum aestivum L.） as materials. The results showed that leaf nitrate reductase （NR） activity was decreased by salinity and further decreased by addition of NaHSO_(3). Glutamine synthetase （GS） activity was enhanced by low salinity and depressed by high salinity. NaHSO_(3) significantly decreased GS activity in leaves of wheat plants exposed to salinity, resulting in the disappearing of GS activity induced by low salinity. The activities of dependence-NADH glutamate dehydrogenase （NADH-GDH） and dependence-NADP isocitrate dehydrogenase （NADP-ICDH） in leaves increased under salinity and further increased by NaHSO_(3), especially for NADH-GDH activity. Free proline content was obviously increased by high salinity. NaHSO_(3)-induced increase in proline content under salinity was found. This indicated that NaHSO_(3) might improve the reserve of carbon and nitrogen in wheat plants under salt stress.
Early allopolyploid evolution in the post-Neolithic <i>Brassica napus</i> oilseed genome (2014)

Oilseed rape (Brassica napus L.) was formed ~7500 years ago by hybridization between B. rapa and B. oleracea, followed by chromosome doubling, a process known as allopolyploidy. Together with more ancient polyploidizations, this conferred an aggregate 72× genome multiplication since the origin of angiosperms and high gene content. We examined the B. napus genome and the consequences of its recent duplication. The constituent An and Cn subgenomes are engaged in subtle structural, functional, and epigenetic cross-talk, with abundant homeologous exchanges. Incipient gene loss and expression divergence have begun. Selection in B. napus oilseed types has accelerated the loss of glucosinolate genes, while preserving expansion of oil biosynthesis genes. These processes provide insights into allopolyploid evolution and its relationship with crop domestication and improvement.
Use of LEU in the aqueous homogeneous medical isotope production reactor (1997)

The Medical Isotope Production Reactor (MIPR) is an aqueous solution of uranyl nitrate in water, contained in an aluminum cylinder immersed in a large pool of water which can provide both shielding and a medium for heat exchange. The control rods are inserted at the top through re-entrant thimbles. Provision is made to remove radiolytic gases and recombine emitted hydrogen and oxygen. Small quantities of the solution can be continuously extracted and replaced after passing through selective ion exchange columns, which are used to extract the desired products (fission products), e.g. molybdenum-99. This reactor type is known for its large negative temperature coefficient, the small amount of fuel required for criticality, and the ease of control. Calculation using TWODANT show that a 20% U-235 enriched system, water reflected can be critical with 73 liters of solution.
A multiresolution technique for video indexing and retrieval (2003)

This paper presents a novel approach to multiresolution analysis and scalability in video indexing and retrieval. A scalable algorithm for video parsing and key-frame extraction is introduced. The technique is based on real-time analysis of MPEG motion variables and scalable metrics simplification by discrete contour evolution. Furthermore, a hierarchical key-frame retrieval method using scalable colour histogram analysis is presented. It offers customisable levels of detail in the descriptor space, where the relevance order is determined by degradation of the image, and not by degradation of the image histogram. To assess the performance of the approach, several experiments have been conducted. Selected results are reported.
Cryopreservation of native Kazakhstan apricot (Prunus armeniaca l) seeds and embryonic axes. (2014)

We recommend storing apricot germplasm as unstratified seed dried to 7 % MC or as isolated embryonic axes.
Poly (<i>N</i>-isopropylacrylamide)-<i>co</i>-(acrylic acid) microgel/Ag nanoparticle hybrids for the colorimetric sensing of H<sub>2</sub>O<sub>2</sub> (2015)

Poly (N-isopropylacrylamide)-co-(acrylic acid) (pNIPAm-co-AAc) microgels composed of Ag nanoparticles (Ag NPs) have been synthesized and employed for the colorimetric sensing of H2O2. Each pNIPAm-co-AAc microgel, which exhibited a diameter of ∼800 nm, contained multiple Ag NPs (diameter of ∼5 nm), and solutions of these hybrid materials showed a UV-vis absorption band at ∼400 nm. This is due to the excitation of the Ag NP surface plasmon. We go on to show that the intensity of this absorption band is dependent on the concentration of H2O2 in solution. Specifically, in the presence of H2O2 the magnitude of the absorption peak dramatically decreases in a linear fashion over the concentration range of 0.30 to 3.00 μM H2O2 (r(2) = 0.9918). We go on to show that the response is selective for H2O2 and can still function in complex mixtures, e.g., we showed that the response is still robust in milk samples. While Ag NPs themselves can exhibit similar responses, this system has many benefits including sample processing and long term stability - i.e., Ag NPs are destabilized in solutions of a certain pH, and aggregate readily. Our microgel/Ag NP hybrids have been shown to be extremely stable and are easily purified prior to use by simple centrifugation/washing protocols. This system is simple and straightforward to use, is low cost, and can be used in complex media, which makes it practical for analyzing complex biological and environmental samples.
60-GHz Wideband Substrate-Integrated-Waveguide Slot Array Using Closely Spaced Elements for Planar Multisector Antenna (2010)

A new wideband waveguide slot array is proposed for covering a wide elevation-angle range with a planar sector antenna of a multigigabit wireless LAN in the 60-GHz band. The requirement of millimeter-wave sector antennas is to realize both wide bandwidth of 11.2% and wide elevation-angle coverage with a required gain of over 10 dBi. To satisfy both the required gain and bandwidth, the important structural features of the proposed antenna are that multiple slot elements are successively arranged at an interval of the length less than one quarter guide wavelengths and that the slot length increases from the shorted waveguide end to the feed end. The operational principle of the slot array is based on multisection quarter-wavelength reflection cancellation, so the slot array can achieve the required bandwidth. Furthermore, this antenna produces a unidirectional radiation pattern by using the radiators and the reflectors, resulting in the required gain over a wide elevation-angle range. In the design, the structural parameters of the slot array are selected to meet the requirements for 60-GHz-band sector antenna. The developed substrate-integrated-waveguide (SIW) slot array achieves both the 10 dB return-loss bandwidth of 15% and the specified gain in 88-96% of the one-sector coverage range of 59-66 GHz. The effectiveness of the proposed slot array for a sector antenna is verified by the good agreement between the simulated and measured results.
Software Reliability and Security (2005)

Software problems are the main causes of system failures today. There are many well-known cases of the tragic consequences of software failures. In critical systems, very high reliability is naturally expected.
Fiber-optic modal coupler using periodic microbending (1986)

An efficient LP01 to LP11 modal coupler using periodic microbends, spaced by a beat length between the modes, was built and tested. The optical-wavelength dependence of the device is investigated, as are the polarization characteristics and the LP mode approximation. Finally, the loss of the modal coupler was measured as a function of wavelength.
Sample Preparation for Analysis of Wood Sugars by Anion Chromatography (1993)

Abstract We investigated the degradation of sugars during acid hydrolysis and the effects of other aspects of sample preparation on measurement of wood sugars by anion exchange HPLC using pulsed amperometric detection. Loss of sugars in standards ranged from 6.4% for arabinose to 15.7% for mannose. Measurements of wood samples to which standard was added before hydrolysis were very close to the sum of wood samples and standards hydrolyzed and analyzed separately except in the case of galactose, which was in significantly lower amounts (4.7% lower) in the combined samples. There was greater variance among injections of individual replicates than among replicates. Other, minor procedural details were investigated.
Ziel der Versuche (1969)

Die in dieser Abhandlung geschilderten Versuche hatten zum Ziel, Kohlenoxid und Kohlenwasserstoffe aus Vergasermotorenabgasen mit und ohne Anwendung von Katalysatoren möglichst vollständig durch Oxydation zu Kohlendioxid und Wasser zu entfernen.
Ruthenation of Non‐stacked Guanines in DNA G‐Quadruplex Structures: Enhancement of <i>c‐MYC</i> Expression (2016)

Abstract Guanine quadruplexes (GQs) are compact four‐stranded DNA structures that play a key role in the control of a variety of biological processes, including gene transcription. Bulky ruthenium complexes featuring a bipyridine, a terpyridine, and one exchangeable ligand ([Ru(terpy)(bpy)X] n + ) are able to metalate exposed guanines present in the GQ of the c‐MYC promoter region that are not involved in quadruplex base pairing. qRT‐PCR and western‐blot experiments indicated that the complexes promote a remarkable increase in the expression of this oncogene. We also show that exchangeable thioether ligands (X=RSR′, Met) allow regulation of the metalating activity of the complex with visible light.
A combinatorial model for self-organizing networks (2007)

In previous works we have proposed to use of self-organization based on emergent design as a model for the programming of very large aggregates of heterogeneous computing resources. In our approach, a large scale computation is divided into small independent units of computation, each provided with its own uniform, autonomous behavior; only local information is used by each unit of computation to take all the decisions needed to carry out the computation. One of the challenges of this novel approach is to provide some theoretical foundation that can assist in the rational design of new systems. In this paper is to demonstrate the use of combinatorial techniques for obtaining quantitative analytical models of the organization pattern emerging from a specific type of self-organizing computation. Specifically, in a previous experiment we have demonstrated a computation in which mobile agents organize themselves around an overlay tree that constantly restructures itself in response to changing node availability and performance levels. In this paper we derive an analytical expression describing how nodes distribute themselves over the tree based on their performance, in a simplified version of the above problem. This result represents an instance of a theoretical tool that can be used to predict global patterns emerging as a result of a self-organizing design, and to establish a direct connection between global features and local behavior parameters.