gebhart/patrepeval huggingface dataset:
Folded pendulum tiltmeter (2002)

The application of the folded pendulum (FP) as a tiltmeter is proposed and some features of it have been studied both theoretically and experimentally. First, FP could have a quite low resonance frequency due to its mechanical structure. The period of our prototype FP is 6.2 s and the amplification factor is about 100. Second, FP is not sensitive to the environmental temperature variation but seriously affected by the temperature gradient. The experiment with a temperature gradient modulation shows that the static equilibrium position of the FP will change by 2.5 μrad if the temperature difference between the horizontal platform and the base of the FP is 0.1 °C. With a prototype FP, we have observed obvious tilt tides, and the calibration result shows that the resolution of the FP is about 1.2 nrad.
Novel AlN/GaN insulated gate heterostructure field effect transistor with modulation doping and one-dimensional simulation of charge control (1997)

We propose a novel AlN/GaN insulated gate heterostructure field effect transistor (FET) with modulation doping. The vertical structure of the FET was AlN(1)/AlGaN(2)/InGaN(3)/AlGaN(4)/AlGaN(5)/GaN(substrate)(6). The typical widths of gate insulator (1) and channel (3) are 4 and 5 nm, respectively. Charge control in the FET was simulated in one dimension by solving Poisson and Schrödinger equations self-consistently. The dependence of transconductance (Gm) and the cutoff frequency (fT) on the gate voltage (Vgs) was obtained, then the optimum structure was determined. We found: (i) In the above structure, without the electron supplying layer AlGaN(2) in the gate side, the FET has high Gm (max=2.9 S/mm) and fT (max=120 GHz; Lg (gate length)=2.5 μm) values in the broad Vgs region (about 3 V) in Gm−Vgs and fT−Vgs characteristics. (ii) Both Gm−Vgs and fT−Vgs characteristics show high values in the Vgs region, which becomes broader as the conduction band discontinuity between the channel (3) and electron supplying layers, (2) and (4), increases. (iii) The optimum channel width (w) is 2 nm⩽w⩽10 nm for the structure with only an electron supplying layer (4). This condition prevents lowering of Gm in the low Vgs region, and keeps the parasitic resistance between gate and source/drain low. (iv) There is an optimum doping concentration and an optimum width of the electron supplying layer, which depend on the conduction band discontinuity between the channel and the electron supplying layer. (v) Channel doping reduces intrinsic Gm and fT in the low Vgs region in Gm−Vgs and fT−Vgs characteristics and does not necessarily increase significantly the equilibrium two-dimensional electron gas concentration.
Comparison of headspace of volatiles from winged beans and soybeans (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of headspace of volatiles from winged beans and soybeansRicardo Del Rosario, Benito O. De Lumen, Tsutomu Habu, Robert A. Flath, T. Richard Mon, and Roy TeranishiCite this: J. Agric. Food Chem. 1984, 32, 5, 1011–1015Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984https://pubs.acs.org/doi/10.1021/jf00125a015https://doi.org/10.1021/jf00125a015research-articleACS PublicationsRequest reuse permissionsArticle Views315Altmetric-Citations52LEARN 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
Enhancement of the isopropanol gas sensing performance of SnO<sub>2</sub>/ZnO core/shell nanocomposites (2017)

Pure SnO<sub>2</sub>, ZnO nanoparticles, and a SnO<sub>2</sub>/ZnO core/shell nanocomposite (NC) were prepared <italic>via</italic> a sol–gel technique.
Regulation of expression of mouse mammary tumor virus through sequences located in the hormone response element: involvement of cell-cell contact and a negative regulatory factor (1993)

Mouse mammary tumor virus (MMTV) is a latently oncogenic retrovirus responsible for the neoplastic transformation of mammary epithelial cells. Its expression is regulated by steroids, polypeptide growth factors, and cell-type-specific factors. Using GR mouse mammary cells and NIH 3T3 fibroblasts stably transfected with chimeric constructs of the long terminal repeat region of MMTV, we have demonstrated a novel mechanism of cell-type-specific expression of this virus. In confluent monolayer cultures that permit cell-cell interaction, MMTV long terminal repeat expression is positively regulated by sequences within the hormone response element (HRE) that bind the transcription factors CTF/NFI and OTFI. Although these factors are present in NIH 3T3 cells, MMTV expression in these cells is not regulated by cell density. This is partially due to a negative regulatory factor that binds sequences between -164 and -151 in the HRE. Mutations that destroy the binding site for this factor restored in part the cell density-regulated expression of MMTV to NIH 3T3 fibroblasts. The HRE is thus a central coordinator of regulatory pathways that positively or negatively influence the expression of MMTV.
Total synthesis of (+)-validamycin B (1987)

The first complete synthesis of the antibiotic validamycin B as its dodeca-O-acetate is reported; coupling of the epoxide (6) and the partially protected valienamine derivative (14), followed by deprotection, gives the product (1b) which was identified by 1H n.m.r. spectroscopy.
Flexible synchronous broad-band subscriber loop system: optical shuttle bus (1989)

A flexible, synchronous, broadband subscriber loop system called the optical shuttle bus is discussed. The emphasis is on the proposed design architecture and performance of a 1.8-Gb/s prototype system. The optical shuttle bus is constructed of multigigabit/second intelligent optical shuttle nodes (OSNs). The software-defined OSNs allow the bus to be configured as a synchronous transmission network with any topology and provides flexible channel allocation by means of a drop/insert/cross-connect function. The OSN can be configured as a highly reliable network by virtue of its self-healing functions such as line switch, bypass, and loop back. The proposed bus architecture has been successfully applied in a 1.8-Gb/s prototype in which three OSNs are connected by one 10-km and two 5-dm single-mode fibers in a ring configuration. Very compact and inexpensive equipment is realized by using high-speed ICs. Experimental results show the proposed architecture to be a powerful one for the realization of synchronous broadband subscriber loop systems.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Methacrylate‐based block ionomers I: Synthesis of block ionomers derived from <i>t</i>‐butyl methacrylate and alkyl methacrylates (1994)

Abstract Diblock and triblock copolymers of t ‐butyl methacrylate ( t BMA) with 2‐ethylhexyl methacrylate (EHMA) and n ‐hexyl methacrylate were prepared via alkyl lithium initiation and sequential addition techniques in THF at −78°C. The t BMA blocks were quantiatively and selectively hydrolyzed to afford poly(methacrylic acid) (PMAA) blocks which were then neutralized with alkali metal bases to form block ionomers. The unhydrolyzed copolymers had a phase mixed morphology as evidenced by thermal analysis while the hydrolyzed and neutralized polymers were multiphase materials. The carboxylic acid and ioncontaning triblock copolymers formed gels in nonpolar solvents which could be disrupted by the addition of polar additives. Certain carboxylic acid and ioncontaining EHMA/ t BMA diblock copolymers also showed this behavior. The triblock ionomers did not show thermoplastic flow prior to degradation, except at the lowest ionic content studied (2%).
A quasi-infinite horizon nonlinear model predictive control scheme with guaranteed stability (1997)

We present in this paper a novel nonlinear model predictive control scheme that guarantees closed-loop stability. The scheme can be applied to both stable and unstable systems with input constraints. The objective functional to be minimized consists of an integral square error (ISE) part over a finite time horizon plus a quadratic terminal cost. The terminal state penalty matrix of the terminal cost term has to be chosen as the solution of an appropriate Lyapunov equation. Furthermore, the setup includes a terminal inequality constraint that forces the states at the end of the finite horizon to lie within a prescribed terminal region. If the Jacobian linearization of the nonlinear system to be controlled is stabilizable, we prove that feasibility of the open-loop optimal control problem at time t = 0 implies asymptotic stability of the closed-loop system. The size of the region of attraction is only restricted by the requirement for feasibility of the optimization problem due to the input and terminal inequality constraints and is thus maximal in some sense.
Radiometer for Remote Sounding of the Upper Atmosphere (1972)

The pressure-modulated CO(2) radiometer is a new kind of instrument capable of making temperature soundings in the 40-80-km region of the earth's atmosphere. It is intended to be mounted on a polar-orbiting satellite, where it will give global coverage of the upper atmosphere in a region that is not well understood at present but that is, as rocket soundings show, clearly the seat of many interesting and vigorous phenomena. The new technique employs a cell containing carbon dioxide as a filter. The pressure and hence transmission of this cell is periodically modulated, resulting in the selection of thermal radiation from the strong lines in the spectrum of atmospheric CO(2). This radiation originates at levels in the atmosphere where the pressure is low. The energy grasp of the device is large enough to give high sensitivity. Tests with a laboratory prototype and a balloon-borne instrument show that the device, if mounted outside the atmosphere, could detect changes of around 1 K in the temperature at 65-km altitude.
Generation of Novel Single-Chain Antibodies by Phage-Display Technology to Direct Imaging Agents Highly Selective to Pancreatic β- or α-Cells In Vivo (2009)

Our data provide strong evidence that the presented SCAs are highly specific for pancreatic beta-cells and enable imaging and quantification in vivo.
Improving the breakdown voltage, ON-resistance and gate-charge of InGaAs LDMOS power transistors (2012)

Recently, a lateral double-diffused metal-oxide-semiconductor (LDMOS) using In0.53Ga0.47As having an extended-p+ (ep+) body has been shown to be better than a conventional silicon-based LDMOS. In this paper, we show that using a stepped gate (SG) for the InGaAs LDMOS, a significantly improved performance can be achieved over using an ep+ body for the InGaAs LDMOS. The proposed device has three steps with the gate oxide thickness increasing from the source to the drain. The SG oxide has the following advantages: a good gate control is achieved because of the smaller oxide thickness near the source, lesser gate-to-drain capacitance is possible due to the greater oxide thickness near the drain and the ON-resistance decreases as a consequence of increased drift region doping which is possible due to the increased thickness of the gate oxide over the drift region. The large mobility of electrons in InGaAs also enhances the current flow and reduces the ON-resistance. Based on 2D device simulation results, we show that the SG LDMOS using InGaAs exhibits 49.7% improvement in the breakdown voltage, 43.8% improvement in the ON-resistance, 105.0% improvement in the range of transconductance, 33.6% improvement in the gate charge and 60.1% improvement in the switching speed as compared to an LDMOS using InGaAs with buried–p+ body.
POF strain sensor using phase measurement techniques (2008)

Polymer optical fiber (POF) elongation sensors have been proposed e.g. by Doering as a low-cost alternative to FBG (single mode Fiber Bragg Gratings) sensors targeting the lower sensitivity range. A recently recovered detection system known from laser distance meters turned out to be very sensitive while staying simple and thus offering low cost potential. The approach is based on measuring the phase shift of a (e.g. sinusoidally) modulated light signal guided in a POF under different tensions resulting in different transit times and thus different phase shifts.
Quantitative control of mitochondria transfer between live single cells using a microfluidic device (2017)

Quantitative control of mitochondria transfer between live cells is a promising approach for genetic manipulation of mitochondrial DNA (mtDNA) because single mitochondrion transfer to a mtDNA-less (ρ<sup>0</sup>) cell potentially leads to homoplasmy of mtDNA. In this paper, we describe a method for quantitative control of mitochondria transfer between live single cells. For this purpose, we fabricated novel microfluidic devices having cell paring structures with a 4.1, 5.6 or 10.0 μm-length microtunnel. When cells were fused through a microtunnel using the Sendai virus envelope-based method, a strictured cytoplasmic connection was achieved with a length corresponding to that of the microtunnel. Elongation of the cytoplasmic connection led to a decrease in mitochondria transfer to the fusion partner. Moreover, some cell pairs that fused through a 10.0 μm-length microtunnel showed single mitochondrion transfer. Fused cells were spontaneously disconnected from each other when they were recovered in a normal culture medium. These results suggest that our cell fusion method can perform quantitative control of mitochondria transfer that includes a single mitochondrion transfer.
Programmable switched capacitor 4-tap FIR filter (2004)

A programmable fully differential switched capacitor 4-tap FIR filter is presented. The filter has fixed tap weights of 1,2,2,1 and programmable sample timing with maximum impulse response length of 6.75 t/sub clk/. One possible use is as a part of WCDMA receiver channel filter relaxing the strict LP filter requirements imposed by the WCDMA specifications regarding adjacent channel attenuation. The filter achieved a SNR of 73 dB, IM2 below-74 dBc and IM3 below -78 dBc for a 2Vpp full-scale differential sine input. The circuit was fabricated on a 0.35 /spl mu/m n-well CMOS process and operates at 2.8V with total current consumption of 3.5mA.
Photoresist gratings on reflecting surfaces (1982)

The fabrication of photoresist gratings on reflecting surfaces is considered both theoretically and experimentally. We show that it is important to take into account the actual phase shift of the waves reflected from the surface. It is found that the intensity at the photoresist-surface boundary may be significantly larger than that at the standing-wave minimum. The theory is confirmed by the examination of the profiles of photoresist gratings made on PbSnTe, in comparison to GaAs. This phenomenon may have wider applications when the photolithographic fabrication of fine features on reflecting surfaces is considered.
Power System Analysis (1994)

1 Basic Concepts 2 Transformers 3 The Synchronous Machine 4 Series Impedance of Transmission Lines 5 Capacitance of Transmission Lines 6 Current and Voltage Relations on a Transmission Line 7 The Admittance Model and Network Calculations 8 The Impedance Model and Network Calculations 9 Power Flow Solutions 10 Symmetrical Faults 11 Symmetrical Components and Sequence Networks 12 Unsymmetrical Faults 13 Economic Operation of Power Systems 14 Zbus Methods in Contingency Analysis 15 State Estimation of Power Systems 16 Power System Stability
Machine Learning based Static Code Analysis for Software Quality Assurance (2018)

Machine Learning is often associated with predictive analytics, for example with the prediction of buying and termination behavior, with maintenance times or the lifespan of parts, tools or products. However, Machine Learning can also serve other purposes such as identifying potential errors in a mission-critical large-scale IT process of the public sector. A delay of troubleshooting can be expensive depending on the error's severity- a hotfix may become essential. This paper examines an approach, which is particularly suitable for Static Code Analysis in such a critical environment. For this, we utilize a specially developed Machine Learning based approach including a prototype that finds hidden potential for failure that classical Static Code Analysis does not detect.
A New Synthetic Method for α-Oxo-β,γ-unsaturated Esters (1992)

Abstract α-Oxo-β,γ-unsaturated esters have been prepared in moderate to good yields via a two-step procedure consisting of the boron trifluoride-promoted reaction of 2-(trimethylsiloxy)acrylic esters with acetals, followed by treatment with silica gel in benzene under reflux.
Effects of hemolysis, hematocrit, RBC swelling, and flow rate on light scattering by blood in a 0.26 cm ID transparent tube (1983)

The intensity of light scattering by blood in a tube of diameter 0.26 cm was measured with an apparatus devised by us at different angles on an incident cross-sectional plane. Changes in angular distribution of light intensity associated with hemolysis, and changes in hematocrit (Ht), red blood cell (RBC) swelling, and flow rate were plotted on polar coordinates. The dyssymmetry index, defined as the ratio of the intensity of light at 45 degrees to that at 135 degrees, was used to characterize the shape of the diagrams of light scattering. The index decreased with Ht, flow rate, but increased with RBC swelling. It is concluded that light scattering by blood requires intactness of the RBC membrane. Even when the cell membrane is intact, light scattering is subject to changes with the flow rate of blood, presumably due to RBC aggregation.
AIDS Information from the National Library of Medicine (1990)

As part of a U.S government effort to combat AIDS, the National Library of Medicine (NLM) is expanding its information services in this area. In response to the Health Omnibus Program Extension Act of 1988, NLM has expanded its AIDS Bibliography, enhanced its DIRLINE file with AIDS-related organizations, and developed three new online MEDLARS (Medical Literature Retrieval and Analysis System) databases: AIDSLINE, AIDSTRIALS, and AIDSDRUGS. NLM's AIDS-related programs and services are discussed.
외국인 주식투자의 대한국 투자결정요인 분석 - 유럽 및 미국의 투자행태를 중심으로 - (2001)

Foreign investment in Korean stock market reflects a evaluation of the Korean capital market and economic situation. In particular, foreign investment has critically affected Korean capital market and economy after the recent financial crisis in Korea. This paper studies the changes of foreign investment Korean stock market after asia financial crises and attempts to analyze empirically the determinants of foreign investment in Korean stockmarket. In the construction of the model domestic and overseas variables are considered. Domestic variables are including the leading composite index, yields on corporate bonds, Korean stock composite index, commodity balance, and won-dollar exchange rate. The overseas variables are including yen-dollar exchange rate, LIBOR and NASDAQ index. The empirical results of regression analysis show that the devaluation of won and the rise in Korean stock composite index encourage the foreign investors to buy the Korean stock. And, the appreciation of yen and the falling of LIBOR positively affect the foreign investment. In particular, they show that the foreign inventors increase net buying when the NASDAQ index is up. We can also find that the overseas variables, in comparison with the domestic variables, affect the foreign investment in Korean stock much more after the Asia crises than before. This paper implies that the authority should stabilize the domestic financial market and avoid the excess appreciation of the won in order to encourage the foreign investment in Korean stock market. And the movements of the international financial markets, such as yen-dollar exchange rate, LIBOR and NASDAQ, should be cautiously monitered.
Improving the standard coding system for deep space missions (2002)

The European Space Agency (ESA) and the US National Aeronautics and Space Administration (NASA) are currently using a concatenated coding system consisting of an outer (255,223) Reed-Solomon code in the Galois field GF(2/sup 8/) and an inner rate R = 1/2 convolutional code with memory M = 6 for the transmission of images in deep space missions. Improvements of the standard coding system which can be separated in two groups are presented. The first group is composed of modifications concerning only the receiver, which can be used in current missions, such as the Galileo Mission, where every tenth of a decibel is needed. The second group comprises additional modifications on code parameters at the transmitter side and should be viewed as recommendations for future deep space missions. In the first group, additional coding gains of about 0.3 dB to 0.4 dB, and, in the second group, of about 0.6 dB to 0.9 dB can be achieved compared to the standard coding system. The increase of complexity is only in the receiver, not in the spacecraft.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Power system analysis using space-vector transformation (2002)

In this paper, the space-vector transformation used in machine vector control is applied to power system analysis. The proposed method is used to model electric machines, power electronic converters, transformers, and transmission lines and to analyze power sources and loads with different connections (delta and wye). This method can also be applied to analyze steady-state (or transient phenomena) and unbalanced sources, including harmonics. Models obtained with this method are as simple as those of the per-phase approach. With the space-vector transformation, instantaneous active and reactive power concepts can be generalized, and new power system control strategies can be developed when power electronic converters are used. Steady-state, transient behavior, and harmonic analyses examples and applications are presented to illustrate the performance and advantages of the proposed method. This method can be extended to unbalanced systems (e.g., unsymmetric faults) using instantaneous symmetrical components in polyphase balanced circuits.
A Distributed Clustering Technique for Intrinsic Cluster Detection (2006)

This paper presents an efficient distributed clustering technique capable of identifying embedded clusters over very large spatial datasets. The technique is based upon a client server approach, where the huge dataset stored in the server are partitioned into almost k equal partitions which are used by k clients to identify the embedded clusters in parallel for each partition sent by the server. Finally, the embedded clusters obtained from the k clients are merged at the Server for the ultimate results. Experimental results establish the superiority of the technique in terms of scale-up, speedup as well as cluster quality, in comparison to its other counterparts ([3], [6]).