gebhart/patrepeval huggingface dataset:
Water front monitoring by ground penetrating radar technology (2010)

Ground penetrating radar technology has been proposed to monitor the water front arrival in oilfield applications; however its effectiveness for real applications remains unproven. The objective of this study is to evaluate the potential of radar technology for realistic thin oil rim scenarios. This was investigated by combining multi‐phase flow simulations with electromagnetic simulations. The output of the reservoir simulations consists of the water saturation distribution over time. We convert the water saturation distribution in electromagnetic properties through well‐established mixing models and use the electromagnetic property distribution as input for the electromagnetic simulations. The interpretation of the results reveals that radar technology is capable of monitoring fluid saturation changes and a qualitative analysis is suggested to evaluate the advance of a non‐uniform water front.
Bioactive Constituents of <i>Thuja </i><i>o</i><i>ccidentalis</i> (2000)

An ethyl acetate-soluble extract of the combined leaves and twigs of Thuja occidentalis was found to inhibit 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase (ODC) in cultured mouse epidermal ME 308 cells. Bioassay-guided fractionation of this extract led to the isolation of six active constituents (1-6), namely, (+)-7-oxo-13-epi-pimara-14,15-dien-18-oic acid (1), (+)-7-oxo-13-epi-pimara-8,15-dien-18-oic acid (2), (+)-isopimaric acid (3), (1S,2S,3R)-(+)-isopicrodeoxypodophyllotoxin (4), (-)-deoxypodophyllotoxin (5), and (-)-deoxypodorhizone (6). Compounds 1 and 4 are new natural products, and their structures and stereochemistry were determined using spectroscopic methods. Compounds 1-6 were evaluated for inhibition of the transformation of murine epidermal JB6 cells, inhibition of ornithine decarboxylase induction with murine epidermal ME 308 cells, and cytotoxic activity against KB cells.
Determination of fish freshness with an enzyme sensor system (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of fish freshness with an enzyme sensor systemIsao Karube, Hideaki Matsuoka, Shuichi Suzuki, Etsuo Watanabe, and Kenzo ToyamaCite this: J. Agric. Food Chem. 1984, 32, 2, 314–319Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https://doi.org/10.1021/jf00122a034RIGHTS & PERMISSIONSArticle Views704Altmetric-Citations179LEARN 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 InReddit PDF (520 KB) Get e-Alertsclose Get e-Alerts
An endopeptidase inhibitor, similar to mammalian alpha 2-macroglobulin, detected in the hemolymph of an invertebrate, Limulus polyphemus. (1983)

A protease inhibitory activity has been detected in the hemolymph of the horseshoe crab, Limulus polyphemus. The inhibitor possesses many of the characteristics of vertebrate alpha 2-macroglobulin. The inhibitor, found in the high speed supernatant of Limulus plasma, is sensitive to mild acidification, inhibits a variety of prokaryotic and eukaryotic endopeptidases, and is sensitive to methylamine treatment. Although the inhibitor completely prevents the trypsin-mediated hydrolysis of protein substrates, the hydrolysis of a low molecular substrate by trypsin is unaffected by the inhibitor, a property characteristic of alpha 2-macroglobulin. The striking similarity of the inhibitor to vertebrate alpha 2-macroglobulin, coupled with the fossil record of Limulus, suggests that such protease inhibitors are ancient molecules.
Activation of Cdk2 is a requirement for antigen-mediated thymic negative selection (2000)

Apoptosis plays a critical role in T cell development and thymic selection. Thymocytes which undergo antigen-induced negative selection have been demonstrated to die by apoptosis. Despite this, relatively little is known about the specific apoptotic pathway involved in negative selection. We have examined the role of cyclin-dependent kinase 2 (Cdk2), a key regulator of thymocyte apoptosis, in this process. Stimulation of thymocytes with cognate antigen leads to a large increase in Cdk2 kinase activity. We also show that pharmacological inhibitors of Cdk2 block thymocyte apoptosis in response to antigen. Our data show that Cdk2 activity is essential for the apoptotic pathway used in negative selection.
Über die „Isomerie” der Dioxalatoplatinate 2. Die freien Säuren (1966)

Abstract Der violetten Dioxalatoplatinsäure kommt die Formel H 1.6 [Pt(C 2 O 4 ) 2 ] zu. Das Platin besitzt darin die Oxydationszahl +2.4. — Für die blauen, konzentrierten Lösungen dieser Säure kann eine Polymerisation der Anionen nachgewiesen und deren Grad abgeschätzt werden. Man darf Metall‐Metall‐Bindungen in festem Zustand und in konzentrierten Lösungen annehmen. Elektronenspektren der Lösungen werden angegeben. Die bisher nicht bekannte freie Säure der gelben, nicht partiell oxydierten Dioxalatoplatinate(II) konnte dargestellt werden. Sie wird in festem Zustand und in konzentrierter Lösung vom Luftsauerstoff rasch oxydiert. Ein partiell oxydierter Monooxalato‐Komplex wird beschrieben.
Failure Analysis of High-Power Piezoelectric Transducers (2005)

Abstract : Low-frequency projectors for underwater sound are often driven near stress limits because of the conflicting requirements of high power and small size. One common failure mode is ceramic cracking and the associated arcing between high-voltage electrodes. While there are a number of manufacturing defects that can cause premature electric breakdown or premature cracking, a fundamental problem results from the coupling between the electric field and stress in a piezoelectric material. For a transducer operated near resonance, there will be hot spots or regions of locally intense stress and electric field that precipitate premature failure. The long-term goals of this project are: (1) to develop a capability to describe such failure modes, (2) to understand the factors that precede failure, and (3) to develop guidelines for failure mitigation.
Parallel configuration in energy management control for the fuel cell-battery-ultracapacitor hybrid vehicles (2011)

This paper proposes a parallel energy-sharing configuration of energy management control for fuel cell hybrid vehicles (FCHVs) application. The hybrid energy source consists of fuel cells (FCs) and energy storage units (ESUs) made up of battery pack and ultracapacitor (UC) module. The aim of the control is to regulate the DC link voltage, which is connected to the traction DC motor via the h-bridge converter. Each source is connected to the DC bus/load using parallel active topology. A total of six control loops are constructed in a supervisory system in order to regulate the DC bus voltage, control of current flow and at the same time, to monitor the state of charge (SOC) of the energy storage devices. The effectiveness of the proposed parallel energy-sharing control system is discussed and analyzed and then verified by experiments.
Micro- and Nanoscale Modification of Poly(2-hydroxyethyl methacrylate) Hydrogels by AFM Lithography and Nanoparticle Incorporation (2005)

Poly(2-hydroxyethyl methacrylate) (PHEMA) hydrogels are widely used as biomaterials. Due to their unique combination of biocompatibility and good mechanical properties, they have potential as scaffolds for tissue engineering applications. To this purpose, topographic and chemical patterning at the nano- to the mesoscale is crucial in order to favor and to characterize cell adhesion and proliferation. Here we report the characterization of as-prepared and patterned PHEMA hydrogels, produced by conventional radical polymerization in water and dimethylformamide. We have obtained chemical and morphological micro- and nanoscale patterning by atomic force microscopy based lithography. We also demonstrate that it is possible to incorporate carbon nanoparticles in the hydrogel matrix by supersonic cluster beam deposition.
10 Gbps/ch Full-Duplex Optical Link Using a Single-Fiber Channel for Signal Transmission (2014)

A 10 Gbps/ch full-duplex (simultaneous bidirectional) optical link utilizing two optical subassembly (OSA) transceiver (TRx) modules and two wavelengths, 850 and 1060 nm, for sending and receiving optical signals through a single fiber channel in a fiber array is demonstrated. Each of the OSA TRx modules consists of transmitter/receiver chips, optical fibers embedded in a V-grooved silicon substrate, two 45 ° mirrors formed in fibers, and three silicon optical benches for mounting vertical-cavity surface-emitting lasers, photodiodes (PDs), and monitoring PDs. Mirror-1 in the fiber is coated with a wavelength-filtering layer to reflect transmitted light and pass through received light. Mirror-2 deflects received light to the PD. Two OSA TRx modules were applied in an end-to-end quad small form-factor pluggable optical link for 40-Gbps operation. This optical link showed good performance with clear eye-diagrams and a BER of at <;10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-12</sup> Gbps/ch with -8-dBm input power.
Reorganizing Data from Transverse Section Scans of the Brain Using Digital Processing (1968)

In section scanning, counts from a radioactive object are collected from many different views and then represented as a rearrangement that causes correspondence of images on a depth-specific plane (1–5). In 1963 we introduced transverse section scanning as a means of portraying the radioactivity in body organs as a crosssection picture (Fig. 1). Two radiation detectors make a sequence of tangential scans at regular angular intervals around the patient so as to view any radioactive structure in the selected cross-section from many different directions. In earlier reports (1–4) we used film exposure summation to reorganize these scan data into a section picture. Originally we made the section picture during the scanning procedure by exposing film with a thin line of light that was moved on the screen of a cathode ray tube (CRT) with speed and orientation matched to the detectors' line of view (Fig. 2). The detectors made tangential scans at 24 different angles (every 7.5°) and 24 separate exposures of the film produced a section picture. With this method, however, we were not always able to prejudge line brightness correctly so that the final picture would have proper contrast. We abandoned making the picture during the scan and instead recorded the data on perforated tape during the study, then used the tape to control the beam of a CRT for picture generation later. We were successful in applying this combined technic of tape recording and film exposure summation to clinical section scanning. For example, we used it to learn that transverse section brain scanning gives additional information about brain tumor distribution and improves detection accuracy for lesions situated at the base of the cranial vault where ordinarily their images can be obscured (4). We suspected, however, that film exposure summation, with its inherent problems of nonlinear addition, might not be the best possible way to make section pictures (5). This paper is a report of our subsequent experience with an alternative method of making transverse section pictures—digital summation. Methods Recording the Scan Data Two opposed scintillation detectors (A and B) scan over paths tangential to the head, rotate 7.5°, rescan along a second pair of tangent paths, rotate another 7.5°, and so on to complete a full revolution and collect data from a total of 24 pairs of scan paths (Fig. 2). Counts detected during each 0.25-cm increment of detector displacement are recorded in 6-bit binary code on standard 8-column perforated paper tape, along with codes specifying the beginning of the scan sequence (RS), the start of each tangent scan (LS), and the end of the scan sequence (RE). An additional code distinguishes data characters of detector A from those of detector B. The counts from each detector (A or B) may be recorded separately on the tape. Alternatively, the counts from the two detectors may be added together during scanning, and the sum (A + B) may be recorded.
Cuprous tert-butoxide. New and useful metalation reagent (1972)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCuprous tert-butoxide. New and useful metalation reagentTetsuo Tsuda, Toshiaki Hashimoto, and Takeo SaegusaCite this: J. Am. Chem. Soc. 1972, 94, 2, 658–659Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissue 1 January 1972https://pubs.acs.org/doi/10.1021/ja00757a069https://doi.org/10.1021/ja00757a069research-articleACS PublicationsRequest reuse permissionsArticle Views4573Altmetric-Citations150LEARN 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
The design and implementation of a software infrastructure for IQ assessment (2012)

Information quality assessment of technical documentation is an integral part of quality management of products and services. Technical documentation is usually assessed using questionnaires, checklists, and reviews. This is cumbersome, costly and prone to errors. Acknowledging the fact that only people can assess certain quality aspects, we suggest complementing these with software-supported automatic quality assessment. The many different encodings and representations of documentation, e.g., various XML dialects and XML Schemas/DTDs, is one problem. We present a system, a software infrastructure, where abstraction and meta modelling are used to define reusable analyses and visualisations that are independent of specific encodings and representations. We show how this system is implemented and how it 1 reads information from documentations 2 performs analyses on this information 3 visualises the results to help stakeholders understand quality issues. We introduce the system, the architecture and implementation, its adaptation to different formats of documentations and types of analyses, along with a number of real world cases exemplifying the feasibility and benefits of our approach. Altogether, our approach contributes to more efficient information quality assessments.
Android: Changing the Mobile Landscape (2010)

The mobile phone landscape changed last year with the introduction of smart phones running Android, a platform marketed by Google. Android phones are the first credible threat to the iPhone market. Not only did Google target the same consumers as iPhone, it also aimed to win the hearts and minds of mobile application developers. On the basis of market share and the number of available apps, Android is a success.
Bone scintigraphy: Part 2. Orthopedic bone scanning. (1993)

Bone scanning provides a functional assessment of skeletal pathology not available with conventional radiography or special radiographic techniques such as CT and MRI. Bone scanning detects osteoblastic activity associated with many forms of orthopedic skeletal disease. Several of the more common orthopedic applications of bone scanning have been described above, while equally important topics such as prothesis loosening, avascular necrosis, and the reflex sympathetic dystrophy syndrome were not considered. Thus, for a great range of benign skeletal pathology, bone scanning can provide the orthopedic surgeon with practical information concerning the cause of the patient's pain, the true significance of otherwise questionable radiographic findings, the extent of disease and the results of orthopedic surgical treatment.
Power distribution network design optimization with on-die voltage-dependent leakage path (2013)

Leakage current has become a significant source of power consumptions of CMOS circuit, as the technology node continues to shrink. Our study shows that the equivalent on-die leakage resistance monotonically decreases as the supply voltage increases and exceeds MOSFET threshold voltage. We propose a system-level power distribution network (PDN) design optimization with voltage-dependent leakage resistance considered in a standard RLC tank model. Our results show that the voltage-dependent leakage resistance can impact on the PDN noise and affect the optimal value of the circuit parameters to minimize the noise. An equivalent constant leakage resistor is proposed to replace the voltage-dependent model for quick noise prediction.
Microstructure and Mechanical Properties of 7A04 Aluminum Alloy in Higher Temperature Solid Solution (2005)

The microstructure and mechanical properties of 7A04 aluminum alloy in higher temperature solid solution were investigated by means of loading specimen in higher temperature,solution in short-time and higher temperature,mechanical properties test and metallographic observation.The results show the strength of 7A04 aluminum alloy is increase with the increase of solution temperature and the increase of the strength of 7A04 aluminum alloy is attributed to the increase of vacancy; The R_m,R_(p0.2)and A of 7A04 aluminum alloy are 652.3 N/mm~2,553.7 N/mm~2and 2.6%, respectively when 7A04 aluminum alloy were loading specimen at 500℃,solution in 510℃ 20 min and aging in 140℃ 6 h+150℃ 1 h.
Linear optics quantum computing - construction of small networks and asymptotic scaling (2008)

In the paradigm of linear optics, quantum states of optical field modes are manipulated by means of photon sources, beam splitters, and photodetectors. This restriction of the allowed interactions introduces non-unit success probabilities into every non-trivial computation irrevocably. The resulting probabilistic nature of this architecture opens up questions about scalability of this approach as well as about basic limitations like optimal resource consumption and the construction of optical networks for given tasks. The scalability question is addressed within the framework of cluster state computing which allows to shift the problem towards the problem of scalable state production. Several schemes with different constraints, resulting in different experimental feasibility, are shown to exhibit optimal scaling behaviour. These schemes include restrictions to certain easy-to-implement gate sets, and the banning of re-routing, which is a major obstacle in optical quantum computing. In the small-scale regime various methods for constructing and analysing linear optics networks are presented. Rather than constructing the gates in the general quantum gate model, a direct construction from linear optics’ basic elements – beam splitters and phase shifters – will be considered. This can result in higher success probabilities and smaller resource consumption. Due to the complexity of the problems, these techniques are applicable only to quantum gates which involve a small number of optical modes and photons. A couple of examples ranging from state preparation over quantum gates to state discrimination are used to illustrate these tools. LOQC – construction of small networks and asymptotic scaling 2
BIOSORPTION FOR METAL IONS REMOVAL FROM AQUEOUS SOLUTIONS: A REVIEW OF RECENT STUDIES (2014)

The presence of metal ions in aqueous solutions represents a major environmental problem. These inorganic species are persistent and non-biodegradable pollutants that should be eliminated from water. In the recent years biosorption have emerged as an economical and environmental friendly method for the decontamination of polluted water. The present work represents a review of the recently published literature discussing the use of non-modified biosorbents for the removal of metal ions from aqueous solution. In this review the main classes of biomass materials used as biosorbents are discussed along with the principle factors affecting the biosorption process such as: solution pH, biomass dose, metal ion concentration and contact time. The potential health and environmental hazards of metal ions in addition to the kinetic and isothermal models usually assessed to fit the biosorption experimental data were also reviewed.
The Effect of Bimodal Pore Size Distribution on Electrical Properties of Some Middle Eastern Limestones (1990)

ABSTRACT Laboratory investigations into the causes of anomalously low electrical resistivity of drill core Samples from two Middle Eastern carbonate reservoirs revealed bimodal pore size distributions. The rocks contain abundant interparticle porosity, but saturation exponents (Archie relation) are low (median=1.45). Scanning electron microscopy and high-pressure mercury porosimetry indicate that a network of interconnected micropores is the most likely explanation of the low resistivity behavior.
PROCESS MEASUREMENTS BY SOUND VELOCIMETRY (1971)

Sound velocity is discussed as a parameter for measuring solution concentration, solids content, specific gravity, and bulk modulus. Graphs are given for six products showing the correlation between sound velocity and concentration. Temperature dependency is discussed and an equation is given with supporting examples for determining concentration measurement error.
Novel magnetic dispersions using silica stabilized particles (1986)

This paper describes the preparation and characterization of a novel dispersion of silica coated magnetic particles. It is shown that by controlling the separation distance between the particles in the dispersion a considerable improvement in dispersion quality and recording performance of rigid disks is realized. Magnetic dispersions were prepared by coating γFe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> and Co-epitaxial γFe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> particles, in a slightly acidic aqueous environment, with colloidal silica particles (4 & 7 nm in size). In order to enhance the particle compatibility with non-polar solvents and binders the silic surface was chemically modified by replacing hydroxyl groups residing on the silica surface with methyl groups. Recording performance of rigid disks prepared with the silica coated magnetic particles was evaluated. Considerable improvement in particle orientability, S/N, defect density and resolution were realized.