gebhart/patrepeval huggingface dataset:
Ring Enlargement of Dichloromethylcyclohexadienones via Polystyrene-Supported Organotin Hydride (1994)

The ring-enlargement of dichloromethylcyclohexadienonederivatives to tropone nuclei via organotin hydrides has been expanded and improved. It can be performed without contamination of the product with toxic tin by-products. The employed polymer-supported organotin hydride and its consecutive products can easily be separated from reaction mixtures by simple filtration. Examples of methyl- and benzotropones are given. The yield of the synthesis via polystyrene-supported organotin hydrides has been compared with those of the formation via tri-n-butyltin hydride (TBTH).
A spatiotemporal approach to tornado prediction (2006)

Automated tornado detection or prediction techniques in the literature have all been based on analyzing signatures of tornadoes that appear in Doppler radar velocity data. Attributes of these signatures are derived from radar data, as well as the near-storm environment, and associated with observed tornadoes. This associated database has been used to train neural networks and support vector machines to automatically classify radar signatures. In this paper, we formulate the tornado prediction problem differently. Instead of devising a machine intelligence approach to classify detections, we formulate the problem as a spatiotemporal one: of estimating the probability of a tornado event at a particular spatial location within a given time window. In this paper, we also describe our initial approach to addressing this differently formulated problem. We use a least-squares methodology to estimate shear, morphological image processing to estimate gradients, fuzzy logic to generate compact measures of tornado possibility and a classification neural network to generate the final spatio-temporal probability field.
A monolithic 8-bit A/D converter with 120 MHz conversion rate (1984)

A monolithic 8-bit flash A/D converter is described which digitizes a 40-MHz signal at a conversion rate of over 100 MHz. To obtain full resolution and high accuracy at ultrahigh speed operation, a three-stage comparator with small talk back and other new logic circuits were designed. The process used is a self-aligned bipolar technology. Signal-to-noise ratio of 45 dB was measured at the 30-MHz input frequency.
Intelligent predictive maintenance of dynamic systems using condition monitoring and signal processing techniques — A review (2016)

Machines without vibrations during operation are something non-existent which results in deterioration of machine tools. The condition based monitoring has become a crucial technique to ensure the machine availability by timely maintenance actions and reducing breakdown maintenance. Several condition monitoring techniques have been reported viz. vibration monitoring, acoustic emission monitoring, chemical monitoring, thermal monitoring and therefore new methods to improve the reliability, effectiveness, accuracy of the fault detection need to be evaluated. Vibration analysis is proven to be an important criterion for fault diagnosis in manufacturing processes and maintenance scheduling for various manufacturing equipment. This paper presents an overview of recent trends in condition monitoring and signal processing methods used for predictive maintenance of dynamic systems.
Optical properties of solvent-cast polymer films (1990)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical properties of solvent-cast polymer filmsJ. S. Machell, Jehuda Greener, and B. A. ContestableCite this: Macromolecules 1990, 23, 1, 186–194Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue 1 January 1990https://pubs.acs.org/doi/10.1021/ma00203a033https://doi.org/10.1021/ma00203a033research-articleACS PublicationsRequest reuse permissionsArticle Views773Altmetric-Citations42LEARN 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 and application of bidentate photoaffinity cross-linking reagents. Nucleotide photoaffinity probes with two photoactive groups (1993)

Two "targeted bidentate" photoaffinity cross-linking reagents, the monoanhydride of 8-N3ADP with N-(4-(benzoyl)phenylmethyl)phosphoramide ([gamma-32P]8-N3ATP gamma BP) and the monoanhydride of 8-N3GDP with N-(4-(benzoyl)phenylmethyl)-phosphoramide ([gamma-32P]8-N3GTP gamma BP), were developed for studying the inter- and intramolecular interactions of nucleotide-binding proteins. Experiments using these bidentate reagents with two photoactive groups led to specific cross-linking: [gamma-32P]8-N3GTP gamma BP and [gamma-32P]8-N3ATP gamma BP showed intersubunit cross-linking of glutamate dehydrogenase and [gamma-32P]8-N3GTP gamma BP appeared to cross-link the alpha- and beta-subunits of tubulin. The non-azido "monodentate" versions of these reagents, the monoanhydride of ADP with N-(4-(benzoyl)phenylmethyl)-phosphoramide ([gamma-32P]ATP gamma BP) and the monoanhydride of GDP with N-(4-(benzoyl)phenylmethyl)-phosphoramide ([gamma-32P]GTP gamma BP), were also synthesized and characterized. The ability of these monodentate reagents with one photoactive group to serve as photoaffinity probes was established by photolabeling specifically the exchangeable GTP-binding domain of tubulin with [gamma-32P]GTP gamma BP and the ATP-binding domain of purified adenylate kinase and several nucleotide-binding proteins in human brain homogenate with [gamma-32P]ATP gamma BP.
The preparation of 14-hydroxylated yohimbine and reserpine derivatives. (1984)

Hydroxylation at C-14 of yohimbine (6), pseudoyohimbine (7) and isoreserpine (8) was made through oxidation of the enamines (10, 15) with benzoyl or p-nitrobenzoyl peroxide followed by reduction with NaBH4 and removal of benzoyl or p-nitrobenzoyl group to give the 14-hydroxylated compounds (13, 14, 22).
A 10BIT 50Msample/sec pipelined CMOS A/D converter with S/H (1992)

We have developed a single 5V, lobit, SOMsps pipelined CMOS A/D Converter (ADC) with internal Sample-andHold (S/H) circuits. The ADC features a newly developed S/H circuit with an 80dB 300MHz operational amplifier (op. amp.), three-stage pipelined 4bit-flash-ADCs with digital error correction functions, and double analog signal conversion paths whose operations are interleaved. The new ADC was fabricated with 0.8 ,U m CMOS technology.
The thermodynamics of template-directed DNA synthesis: Base insertion and extension enthalpies (2003)

We used stopped-flow calorimetry to measure the overall enthalpy change associated with template-directed nucleotide insertion and DNA extension. Specifically, we used families of hairpin self-priming templates in conjunction with an exonuclease-free DNA polymerase to study primer extension by one or more dA or dT residues. Our results reveal exothermic heats between -9.8 and -16.0 kcal/bp for template-directed enzymatic polymerization. These extension enthalpies depend on the identity of the inserting base, the primer terminus, and/or the preceding base. Despite the complexity of the overall process, the sign, magnitude, and sequence dependence of these insertion and extension enthalpies are consistent with nearest-neighbor data derived from DNA melting studies. We recognize that the overall process studied here involves contributions from a multitude of events, including dNTP to dNMP hydrolysis, phosphodiester bond formation, and enzyme conformational changes. It is therefore noteworthy that the overall enthalpic driving force per base pair is of a magnitude similar to that expected for addition of one base pair or base stack per insertion event, rather than that associated with the rupture and/or formation of covalent bonds, as occurs during this catalytic process. Our data suggest a constant sequence-independent background of compensating enthalpic contributions to the overall process of DNA synthesis, with discrimination expressed by differences in noncovalent interactions at the template-primer level. Such enthalpic discrimination underscores a model in which complex biological events are regulated by relatively modest energy balances involving weak interactions, thereby allowing subtle mechanisms of regulation.
Thermal and source bumps utilizing carbon nanotubes for flip-chip high power amplifiers (2006)

Carbon nanotubes (CNTs) have been successfully developed as thermal and source bumps for flip-chip high power amplifiers (HPAs). The newly developed 15 mum long CNT bumps exhibit thermal conductivity of 1400 W/m-K. A flip-chip AlGaN/GaN HEMT HPA with a gate width of 2.4 mm utilizing CNT bumps, operating voltage of 40 V, exhibits an output power of 39 dBm at, a frequency of 2.1 GHz without any degradation due to heat-up. To our knowledge, this is the first report about, a practical application of CNTs using their high thermal conductivity
Enforcing Network Connectivity in Robot Team Missions (2010)

The growing interest in robot teams for surveillance or rescue missions entails new technological challenges. Robots have to move to complete their tasks while maintaining communication among themselves and with their human operators, in many cases without the aid of a communication infrastructure. Guaranteeing connectivity enables robots to explicitly exchange information needed in collaborative task execution, and allows operators to monitor or manually control any robot at all times. Network paths should be multi-hop, so as not to unnecessarily restrict the team’s range. In this work we contribute a complete system which integrates three research aspects, usually studied separately, to achieve these characteristics: a multi-robot cooperative motion control technique based on a virtual spring—damper model which prevents communication network splits, a task allocation algorithm that takes advantage of network link information in order to ensure autonomous mission completion, and a network layer which works over wireless 802.11 devices, capable of sustaining hard real-time traffic and changing topologies. Link quality among peers is the key metric used to cooperatively move the robots and maintain uninterrupted connectivity, and the basis for novel ideas presented in each subsystem. Simulations and experimental results with real robots are presented and discussed.
Indexing 3D Scenes Using the Interaction Bisector Surface (2014)

The spatial relationship between different objects plays an important role in defining the context of scenes. Most previous 3D classification and retrieval methods take into account either the individual geometry of the objects or simple relationships between them such as the contacts or adjacencies. In this article we propose a new method for the classification and retrieval of 3D objects based on the Interaction Bisector Surface (IBS), a subset of the Voronoi diagram defined between objects. The IBS is a sophisticated representation that describes topological relationships such as whether an object is wrapped in, linked to, or tangled with others, as well as geometric relationships such as the distance between objects. We propose a hierarchical framework to index scenes by examining both the topological structure and the geometric attributes of the IBS. The topology-based indexing can compare spatial relations without being severely affected by local geometric details of the object. Geometric attributes can also be applied in comparing the precise way in which the objects are interacting with one another. Experimental results show that our method is effective at relationship classification and content-based relationship retrieval.
Isoguanine Quartets Formed by d(T4isoG4T4): Tetraplex Identification and Stability (1996)

The self-aggregation of the oligonucleotide d(T4isoG4T4) (1) is investigated. Based on ion exchange HPLC experiments and CD spectroscopy, a tetrameric structure is identified. This structure was formed in the presence of sodium ions and shows almost the same chromatographic mobility on ion exchange HPLC as d(T4G4T4) (2). The ratio of aggregate versus monomer is temperature dependent and the tetraplex of [d(T4isoG4T4)]4 is more stable than that of [d(T4G4T4)]4. A mixture of d(T4isoG4T4) and d(T4G4T4) forms mixed tetraplexes containing strands of d(T4isoG4T4) and d(T4G4T4).
ViCA-a WWW based tool for visualizing project status (2005)

Easy-to-access and up-to-date project status feedback is an important aspect of effective project management. When project data is collected, a common problem is how to present the data in an understandable form to the right people at the right time. The Visualization Client Applet (ViCA) is a Java-based client program. It is designed for Internet-based visualizations and is currently piloted in several high-tech companies. ViCA can be used even in a geographically distributed multi-project environment. The user is presented with a personalized up-to-date view of the project in which he is involved. The view is a fully configurable panel, which provides fast feedback of the project status. It can contain any number of metrics; each visualized by one or more charts. The user can navigate to a new panel by clicking a part of the chart. This paper discusses the benefits of YiCA, as applied in several product development organizations.
A New Calculation Method of Dynamic Kill Fluid Density Variation during Deep Water Drilling (2017)

There are plenty of uncertainties and enormous challenges in deep water drilling due to complicated shallow flow and deep strata of high temperature and pressure. This paper investigates density of dynamic kill fluid and optimum density during the kill operation process in which dynamic kill process can be divided into two stages, that is, dynamic stable stage and static stable stage. The dynamic kill fluid consists of a single liquid phase and different solid phases. In addition, liquid phase is a mixture of water and oil. Therefore, a new method in calculating the temperature and pressure field of deep water wellbore is proposed. The paper calculates the changing trend of kill fluid density under different temperature and pressure by means of superposition method, nonlinear regression, and segment processing technique. By employing the improved model of kill fluid density, deep water kill operation in a well is investigated. By comparison, the calculated density results are in line with the field data. The model proposed in this paper proves to be satisfactory in optimizing dynamic kill operations to ensure the safety in deep water.
An OpenFlow-based testbed for information centric networking (2012)

Information-centric networking (ICN) is a novel networking paradigm which is attracting increasing attention by both academic and industrial researchers. In fact, it promises to provide technological solutions that best fit with the way in which Internet is actually utilized. Assessment of proposed solutions require appropriate experimental testbeds. In this context OpenFlow, which has been developed to enable the deployment of novel networking solutions in the actual network infrastructure, represents a valuable tool. Accordingly, we are currently implementing an ICN solution - called CONET - for OpenFlow networks. The solution will be deployed in two testbeds, part of larger experimental OpenFlow facility distributed across Europe realized by the EU funded OFELIA project. In particular one testbed will be based on the Open vSwitch platform while the other will be deployed on NetFPGA platforms. Our implementation has been designed to easily support other ICN solutions with simple modification of the code. Basic ICN functionality that are specifically addressed in our implementation are data naming, route-by-name, and in-network caching.
Melanoma-inhibiting activity inhibits cell proliferation by prolongation of the S-phase and arrest of cells in the G2 compartment. (1990)

Autocrine-secreted melanoma tumor growth-inhibiting activity (MIA, approximately Mr 8000) was isolated from supernatants of a malignant melanoma cell line HTZ-19 dM, established from a central nervous system-melanoma metastasis. Cell cycle kinetic analysis performed with bromodeoxyuridine/Hoechst flow cytometry revealed a MIA-sensitive period at the G0/G1 to S traverse; MIA mediated prolongation of the S-phase and increased arrest of cells in the G2 compartment. Growth inhibition by MIA is cell-density dependent; maximal effect is seen at low densities, and the effect may be partially antagonized by whole serum. MIA may cause growth stimulation at high cell densities and low MIA concentrations. The effect of MIA on different histological neuroectodermal cell types was compared by the same methodology: proliferation of a second malignant melanoma was inhibited, and no effect was observed with an ependymoma; 2 glioblastomas were slightly stimulated. Effects on human fibroblast-like cell strains were inconsistent. The mechanism of MIA is discussed in relation to other endogenous autocrine growth inhibitors.
A Process-Oriented Ontology for Representing Software Engineering Project Knowledge (2009)

Organizational project knowledge is not being captured, consolidated, and organized, making it difficult to learn from past projects, expose the knowledge of the most experienced people, or share experience across geographic project locations. The lack of an ontology for representing this comprehensive project store inhibits its creation and the development of tools to operate on it. Process-orientation links organizational resources or artifacts with process phases and workflow. A process-orientation in knowledge management can be used to add contextual metadata to knowledge artifacts. Context can be used to improve information retrieval precision. Therefore, the study proposed a process-oriented ontology to improve the transfer of software engineering project knowledge. Four questions guided the research: What knowledge about projects should be captured? Are all project artifacts necessary and are they all equally valuable? How can process-orientation be applied to a software engineering project knowledge ontology? Are current knowledge representation languages appropriate for the task? Can software development project knowledge, as represented by this ontology, be captured and retrieved effectively in a KMS? Literature research and an empirical laboratory study answered all of the questions: Four areas of project knowledge are particularly valuable in terms of their impact on project success; requirements, revisions, risks, and resolutions. These areas also cover a meaningful breadth of software engineering project knowledge. A process abstraction was created that breaks a project down into eleven phases. These phases were the basis for a class definition that was added as a peer class to the knowledge artifacts. Using Protégé, the Process-Oriented Ontology for Software Engineering (POSE) was successfully implemented in OWL-DL. Project knowledge from a software organization was used to construct two knowledgebases: one using Google Desktop and the other using Protégé and POSE. Results demonstrated that software engineering project knowledge, as represented by POSE, can be effectively captured and retrieved. POSE-enhanced search was superior to keyword search. Google was comparable in broad text search. But the benefits of metadata and semantics proved to have significant advantages for ontologies. Process-orientation was also validated as a contributor to improved classification and retrieval.
<title>Feasibility of an integrated optics surface plasmon modulator</title> (1994)

The design and fabrication of a surface plasmon resonance electro- optic polymer light modulator in a bulk format is discussed. Initial experimental results are presented which demonstrate up to 18.5% modulation for a surface plasmon modulator constructed on the base of a SF-59 window using a silver/polymer/silver configuration. A theoretical model for the miniaturization of this device into an integrated optical configuration is presented. The potential benefits and obstacles associated with fabricating this device in an integrated configuration are discussed.
ChemInform Abstract: Aqueous DMF—Potassium Carbonate as a Substitute for Thallium and Silver Additives in the Palladium‐Catalyzed Conversion of Aryl Bromides to Acetyl Arenes. (2001)

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.
Δ-Terpineol (1966)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTΔ-TerpineolBernard M. Mitzner and Seymour LembergCite this: J. Org. Chem. 1966, 31, 6, 2022–2023Publication Date (Print):June 1, 1966Publication History Published online1 May 2002Published inissue 1 June 1966https://pubs.acs.org/doi/10.1021/jo01344a537https://doi.org/10.1021/jo01344a537research-articleACS PublicationsRequest reuse permissionsArticle Views128Altmetric-Citations8LEARN 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
Nicotinic acetylcholine receptor from chick optic lobe. (1982)

An alpha-bungarotoxin-sensitive nicotinic cholinergic receptor from chick optic lobe has been completely purified. Its standard sedimentation coefficient is 9.1 S. The value near 12 S reported for the related component from other brain regions can be reproduced when the initial extraction is by Triton X-100 (rather than Lubrol PX), but other protein is then complexed with it. A single subunit of apparent molecular weight 54,000 is detected, and this subunit is specifically labeled by bromo-[3H]acetylcholine, but only after disulfide reduction. The same size subunit likewise is labeled in the protein (purified similarly) from the rest of the chick brain which can also bind alpha-bungarotoxin and nicotinic ligands. Immunological crossreactivity is demonstrated between both of these proteins with an antiserum to pure acetylcholine receptor from skeletal muscle. The acetylcholine receptor from chick optic lobe and the alpha-bungarotoxin-binding protein from the rest of the brain appear similar or identical by a series of criteria and are related to (but with differences from) peripheral acetylcholine receptors.