gebhart/patrepeval huggingface dataset:
Robust Color Object Recognition for a Service Robotic Task in the System FRIEND II (2007)

One of the key requirements of service and rehabilitation robotic systems is the robust perception of the environment. This paper presents the machine vision framework within the rehabilitation robotic system FRIEND II and a method for improving the visual perceptual capability of this system. For the reliable, autonomous performing of the "beverage serving" task robust visual information about the objects to be manipulated in the presence of variable lighting conditions is necessary. A novel aspect of the proposed color object recognition method is its use of feedback control at the image segmentation level, which makes it able to cope with the object color uncertainty caused by different illumination conditions. The idea behind the closed-loop image segmentation is to provide the object recognition step with input data on which it can rely. The proposed object recognition method uses Hu moments which are invariant to rotation, translation and scaling of the object in the image. The benefit of the closed-loop color object recognition in service robotics is demonstrated through the example of the recognition of the green bottle. The presented experimental results on the performance evaluation show that the proposed method has robustness with respect to illumination as well as with respect to the different localization of the object to be manipulated.
Active Constituents Against HIV-1 Protease from<i>Garcinia mangostana</i> (1996)

The ethanol extract of Garcinia mangostana L. (Guttiferae) showed potent inhibitory activity against HIV-1 protease. The activity-guided purification of the extract resulted in the isolation of two active, known compounds. The chemical structures of the isolated compounds were established by spectroscopic analyses as mangostin (IC50 = 5.12 +/- 0.41 microM) and gamma-mangostin (IC50 = 4.81 +/- 0.32 microM). The type of inhibition by both compounds is noncompetitive.
Positional effect of single bulge nucleotide on PNA(peptide nucleic acid)/DNA hybrid stability (1999)

We report positional effect of bulge nucleotide on PNA/DNA hybrid stability. CD spectra showed that PNA/DNA hybrids required at least seven base pairings at a stem region to form a bulged structure. On the other hand, DNA/DNA could form bulged structure when there are only four base pairings adjacent to the bulge nucleotide. We discuss why PNA requests such a many base pairings to form bulged structure from a nearest neighbor standpoint.
Extraction and determination of chloroform in rat blood and tissues by gas chromatography-electron-capture detection: distribution of chloroform in the animal body. (1980)

Abstract We have developed a simple, sensitive, and accurate method for the determination of chloroform in rat blood, brain, kidney, liver, and fat. The detection limit is 2.5 ng of chloroform per gram of tissue. Studies of in vivo distribution of chloroform in rat blood and target tissues after intragastric intubation of chloroform/water show that the amount of chloroform accumulated in the different tissues increases with increasing doses. Fat tissue contains the greatest amount of chloroform. The accumulation of chloroform in rat blood and target tissues seems to be maximum 1.5 h after administration, and the apparent chloroform concentration is almost at baseline value 8 h later.
Autonomous radio sensor points to new applications (2001)

A Siemens research team has developed a sensor that remains passive unless an event such as a pressure change occurs, in which case it generates its own power and transmits a signal to a receiver. The next generation of the sensor is expected to measure only 2 × 5mm, and when manufactured in bulk should be a low cost device. Applications are envisaged to remotely controlled light switches and radiator thermometers, home, office and warehouse security, and many other areas. A current project, reported to be making good progress, is to mould the sensors into vehicle tyres to give continuous information on tyre pressure, axle load and other parameters. The sensor, which was developed at the Perlach R&D Centre of Siemens, near Munich, has been nominated for the prestigious German Zukunftspreis (Future Award).
EFFECT OF PHYSICO-CHEMICAL PROPERTIES OF HYDROXYPROPYLMETHYLCELLULOSE ON DISSOLUTION FROM HYDROPHILIC MATRIX TABLETS (1994)

The effect of cellulose ether substitution ,
particle size and viscosity of hydroxy-propylmethylcellulose(HPMC )on 
the dissolution from hy drophilic matrix tablets was studied 
withcaptopril(I),chlorpheniramine maleate(II)and indomethacin(III)as 
model drugs. It was foundthat the dissolution of drugs from matrix 
was connected with the physico-chemical properties of HPMCand drug 
solubility.The dissolution of I and II matrix tablets was slower with 
higher hydroxypropylcontent,but for III the result was the 
opposite,Hence ,hydroxypropyl content was the major factoraffecting 
the dissolution. The range of HPMC particle size from below 60 mesh 
to above l20 meshgave similar release rate for l and II ,but smaller 
particle size would give slower dissolution rate fromIII matrix. HPMC 
K100 gave the highest dissolution rate for all three drugs, which 
were released innearly 60 min. Variation in viscosity of HPMC 
K4M,K15M and K100M showed insignificant differ-ence in dissolution 
rate for I and II, and higher viscosity of HPMC gave slower release 
for III matrix tablets.
All-Digital Multi-Phase Delay Locked Loop for Internal Timing Generation in Embedded and/or High-speed DRAMs (1997)

We propose an all-digital, multi-phase delay locked loop (DLL) for internal timing generation in embedded DRAMs. The timing generation is achieved by combining the DLL with a command decoder and a resister controlled multi-phase clock counter. The DLL has four phase (d2 step) and six phase (n/3 step) output mode, and employs coarse and fine delay lines to minimize the delay line area while keeping the skew resolution down to a value obtainable by all-digital delay elements. Our DLL operates over a clock range of 125 to 400 MHz with skew adjustment error of*60 ps.
Comparison of in vitro disc diffusion and time kill‐kinetic assays for the evaluation of antimicrobial wound dressing efficacy (2005)

There is a plethora of new silver-containing dressings on the market today. Various manufacturers attempt to show that their dressings are the most efficacious and therefore should be preferentially employed by health care workers based on the results of their in vitro tests. However, there have been no studies that clearly identify which tests are appropriate for comparison purposes. The purpose of this study was to determine which in vitro test is most appropriate for evaluating the antimicrobial efficacy of silver-containing dressings. This was done by testing seven silver-containing dressings and two non-silver-containing topical agents against 17 clinically relevant microorganisms using zone of inhibition assays and time-kill kinetic assays in complex media. The results for the two assays were then correlated to determine whether the methods generated similar results. It was determined that the two methods do not correlate at all. This is most likely a result of the silver interacting with the media in the zone of inhibition test, thus invalidating the results of this test. We therefore conclude that zone of inhibition data generated for silver-containing dressings is of little value when assessing antimicrobial efficacy and that time-kill assays are of greater use.
Design of reliability critical system using axiomatic design with FMECA (2017)

In product design, the initial design stage is being increasingly emphasized because it significantly influences the successive product development and production stages. However, for larger and more complex products, it is very difficult to accurately predict product reliability in the initial design stage. Various design methodologies have been proposed to resolve this issue, but maintaining reliability while exploring design alternatives is yet to be achieved. Therefore, this paper proposes a methodology for conceptual design considering reliability issues that may arise in the successive detailed design stages. The methodology integrates the independency of axiomatic design and the hierarchical structure of failure mode, effects, and criticality analysis (FMECA), which is a technique widely used to analyze product reliability. We applied the proposed methodology to a liquefied natural gas fuel gas supply system to verify its effectiveness in the reliability improvement of the design process.
Effects of coal-derived trace species on the performance of molten carbonate fuel cells (1991)

The overall objective of the present study was to determine in detail the interaction effects of 10 simultaneously present, coal-gas contaminants, both on each other and on components of the Carbonate Fuel Cell. The primary goal was to assess underlying chemistries and reaction mechanisms which may cause decay in fuel cell performance or endurance as a result of both physics-chemical and/or mechanical interactions with the cell components and internal fuel cell parts. It was found, both from theory and cell test evidence, that trace contaminant interactions may occur with: Fuel-cell Electrodes (e.g., in this study with the Ni-anode), Lithium/Potassium Carbonate Electrolyte, Nickel and SS-Hardware, and by Mechanical Obstruction of Gas Flow in the Anode Plenum.
Characterization of the Physical Interaction of Gli Proteins with SUFU Proteins (2003)

The Hedgehog signaling pathway is involved in both development and cancer induction in a wide range of organisms. The end point of the Hedgehog signal-transduction cascade is the Gli/Ci, zinc-finger transcription factors. Proteins such as Fused, Suppressor of fused (SUFU), Costal-2, and protein kinase A are essential for regulation of Gli/Ci processing, activity, and localization. Coimmunoprecipitation and Far Western assays, coupled with truncation analysis and mutagenesis have been used to define the region of interaction between Gli proteins and SUFU. We identify a novel motif SYGH in Gli/Ci family proteins, which is required for the interaction with SUFU. Mutational studies revealed that Gly(122) and His(123) are crucial for binding to SUFU, suggesting the importance of hydrophobicity for the correct binding conformation. Functional analysis revealed that the activity of GLI transcription factors with mutations in this motif is no longer suppressed by co-expression of SUFU. Moreover, we have found that a C-terminal 19-amino acid deletion in SUFU (delta465) is sufficient to abrogate interaction with GLI1. Interestingly, this SUFU mutant localizes in the nucleus, most probably because it is not efficiently sequestered in the cytoplasm. Taken together, we identified a novel motif in the Gli/Ci family of proteins that is essential both for protein-protein interaction with SUFU and for functional repression of GLI1 by SUFU.
Asymmetric Anionic Polymerization of N-Substituted Maleimides with Et2Zn and Chiral Bisoxazolines (1998)

Abstract Anionic polymerizations of N-substituted maleimides (RMI:R=cyclohexyl (CHMI), R=phenyl (PhMI)) were achieved by chiral anionic initiator such as diethylzinc (Et2Zn)–chiral bisoxazoline (R′box) to afford optically active poly(RMI). The polymerizability was enhanced by the accelerated nucleophilicity of the ethyl groups in Et2Zn due to R′box ligands. The specific rotations of poly(PhMI) ([α]25435 −28.4 to + 94.6°) were much improved than those initiated by n- BuLi - R′box.
Low power DSP's for wireless communications (2000)

Wireless communications and more specifically, the fast growing penetration of cellular phones and cellular infrastructure are the major drivers for the development of new programmable Digital Signal Processors (DSP's). In this tutorial, an overview is given of recent developments in DSP processor architectures, that makes them well suited to execute computationally intensive algorithms typically found in communications systems. DSP processors have adapted instruction sets, memory architectures and data paths to execute compute intensive communications algorithms efficiently and in a low power fashion. Basic building blocks include convolutional decoders (mainly the Viterbi algorithm), turbo coding algorithms, FIR filters, speech coders, etc. This is illustrated with examples of different commercial and research processors.
Extended Kalman Filtering for Remaining-Useful-Life Estimation of Bearings (2014)

Condition-based maintenance, which includes both diagnosis and prognosis of faults, is a topic of growing interest for improving the reliability of electrical drives. Bearings constitute a large portion of failures in rotational machines. Although many techniques have been successfully applied for bearing fault diagnosis, prognosis of faults, particularly predicting the remaining useful life (RUL) of bearings, is a remaining challenge. The main reasons for this are a lack of accurate physical degradation models and limited labeled training data. In this paper, we introduce a data-driven methodology, which relies on both time and time-frequency domain features to track the evolution of bearing faults. Once features are extracted, an analytical function that best approximates the evolution of the fault is determined and used to learn the parameters of an extended Kalman filter (KF). The learned extended KF is applied to testing data to predict the RUL of bearing faults under different operating conditions. The performance of the proposed method is evaluated on PRONOSTIA experimental testbed data.
A Technology Platform for Providing Broadband Communications Services (1993)

Electrical and optical components are being created that can be flexibly interconnected to meet the needs of a wide range of emerging business customers. The electrical components are based on a versatile, high-speed electronic-bus architecture that can simultaneously transport voice, data, and video signals, synchronously or asynchronously, at multi-gigabit-per-second data rates. Port cards can reserve bus bandwidth for synchronous circuit connections, and can contend for asynchronous bandwidth to send packets. A high-speed optical network interconnects these electronic switches. As data-rate requirements increase to multi-gigabit-per-second transfer rates, optical switches can be used to form distributed broadband networks that span buildings, campuses, and corporations. Inherent data rate and protocol transparency makes optical switches ideal for networking a wide variety of information sources.
Identification of leishmanial antigens in the sera of patients with American visceral leishmaniasis (1988)

Circulating immune complexes are present in the sera of patients with visceral leishmaniasis caused by Leishmania donovani chagasi. In order to determine whether these complexes contain parasite antigens, sera were collected from Brazilian patients with visceral leishmaniasis and from hospitalized control subjects with other diagnoses. High-molecular-weight complexes were precipitated from pooled sera with 2.5% polyethylene glycol. Approximately 140-fold-more protein was precipitated from patient sera than from control sera; 12% of the total patient serum protein was precipitated. Patient serum precipitates contained immunoglobulins G (525 mg/dl), M (27 mg/dl), and A (8 mg/dl). Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the patient serum precipitates revealed multiple bands, including a prominent band at 70 kilodaltons, that were not seen in precipitates of control sera. The 70-kilodalton band was recognized by human and hamster sera with antileishmanial antibodies, but not by control sera. Finally, immunization of BALB/c mice with the high-molecular-weight precipitates from patients elicited antileishmanial antibodies against L. donovani chagasi antigens as detected by enzyme-linked immunosorbent assay and Western blot (immunoblot) assay. In summary, sera of patients with American visceral leishmaniasis were found to have high-molecular-weight complexes that contained one or more parasite antigens. These complexes may play a role in the immunology of the disease, and detection of circulating parasite antigens has potential diagnostic importance.
Treatment of Pneumocystis carinii pneumonia with 1,3-beta-glucan synthesis inhibitors. (1990)

Pneumocystis carinii pneumonia is a major cause of death in AIDS patients in the United States. The presently available treatments have limited use due to a high incidence of adverse reactions. Therefore, there is an urgent need for a safer method for treatment and prevention of this disease. Recent evidence has suggested that P. carinii is related to fungi and that the wall of the cyst form contains 1,3-beta-glucan as a major constituent. Based on this, several proposed 1,3-beta-glucan synthesis inhibitors were evaluated for their ability to control P. carinii pneumonia in vivo. Compounds from two classes of 1,3-beta-glucan synthesis inhibitors, the echinocandins and papulacandins, were found to be effective against P. carinii.
Effect of composition of titanium in silver-copper-titanium braze alloy on dissimilar laser brazing of binder-less cubic boron nitride and tungsten carbide (2014)

Laser brazing with Ti as an active element in silver-copper alloy braze metal has been carried out for binder-less cubic boron nitride and tungsten carbide, using silver-copper- titanium braze alloys with titanium content that varied between 0.28 mass% and 1.68 mass%. Observations of the interface using electron probe microanalysis and scanning acoustic microscopy show that efficient interface adhesion between binder-less cubic boron nitride and the silver-copper-titanium braze alloy was achieved for the braze with a titanium content of 0. 28 mass%.
Near-wellbore Alteration and Formation Stress Parameters using Borehole Sonic Data (2005)

Abstract Highly depleted reservoirs exhibit sharply lower pore pressures and horizontal stress magnitudes than in the overlying shaly formation. Drilling through such depleted reservoirs can cause severe fluid loss and drilling-induced wellbore instability.Accurate and reliable estimates of horizontal stresses can provide early warning of impending drilling problems that may be mitigated by appropriate drilling fluid design and drilling practices. We have developed a new multi-frequency inversion algorithm for the estimation of maximum and minimum horizontal stress magnitudes using cross-dipole dispersions. Borehole sonic data for the case study presented in this paper was acquired by a cross-dipole sonic tool in a deep-water well, offshore Louisiana in the Gulf of Mexico (GOM). The logged interval spans 1000 ft below the casing shoe. In addition, the Modular Dynamic Tester (MDT)1 mini-frac tests were performed at three depths in shale, yielding two minimum horizontal stress magnitudes. The borehole sonic data was suitable for inversion of cross-dipole dispersions at three depths in shale and also at a depth in a highly depleted sand reservoir. There was one depth in shale above the depleted sand where we could estimate the minimum horizontal stress magnitude using both the MDT mini-frac tests and inversion of borehole sonic data.The results of the two techniques are consistent, providing encouragement for further validation of the multi-frequency inversion of cross-dipole dispersions to estimate horizontal stresses. Even though the overburden stress is expected to increase with depth, both the maximum (SHmax) and minimum (Shmin) horizontal stresses obtained from the inversion of borehole sonic data are significantly smaller in the depleted sand than in the overburden shale. However, both the horizontal stress magnitudes increase again in the shale below the depleted sand. Such rapid variations in horizontal stress magnitudes cause large fluctuations in the safe mud weight window. This challenge in drilling through the depleted sand was successfully handled by using special drilling fluid to mitigate seepage losses and differential sticking in the depleted sand and overlying shale.We have also performed Dipole Radial Profiling (DRP) of formation shear slownesses using the measured cross-dipole dispersions at three depths in shale and one in the highly depleted sand. Analysis of radial profiles in the two orthogonal directions indicates plastic yielding or stiffening of rock in the near-wellbore region. While plastic yielding increases the shear slowness, stiffening would reduce the shear slowness.
The ion beam optics of a single wafer high current ion implanter (2002)

We present the optics of a serial processing high current ion implanter, the SHC-80. This design uses a 350 mm/spl times/40 mm ion beam, through which the wafer is scanned in a single direction. The ion beam is required to meet or surpass industry standards of stability and purity, and in addition to be uniform to 1% along its major dimension, requiring unique optics and controls. The ion source is a White source, modified to produce a highly divergent ion beam, uniform to /spl sim/5%. An analyzing magnet with a resolving power of well over 60 has an unusually large geometrical acceptance and incorporates adjustable aberration controls. A second larger magnet functions as a condenser lens, delivering a broad beam parallel to /spl Lt/1 degree to the endstation. Two multipole elements are used to correct the ion beam uniformity. Deflections of <0.5 degrees are more than sufficient to achieve uniformity across the implant plane, correcting aberrations and other sources of non-uniformity. Current densities at most locations in this system are only 1% of those in batch high current implanters. Trapping of neutral atoms is intrinsic. This approach enables high tilt implants at production throughput and provides process advantages in the areas of transient heating effects, charging, and particle transport.
Characteristics of stacked rectangular and triangular patch antennas for dual band applications (1993)

Multi-band antennas have applications in radars and communication systems. For their light-weight low-cost properties, stacked microstrip patch antennas have recently gained increasing support as dual frequency antennas. The paper presents a general technique for the theoretical determination of the input impedances and the radiation patterns of stacked microstrip patch antennas of arbitrary shapes. It then investigates various cases of stacked rectangular and triangular patch antennas. For these antennas, some approximations are introduced in the modelling technique in order to make it efficient on personal computer. The investigations on the stacked rectangular patch antenna focus on antennas with dissimilar substrates, non-aligned patches or unequal patch sizes. The effects of some radomes on the characteristics of the stacked rectangular patch antennas are also included. As far as the stacked triangular patch antenna is concerned, its analysis is presented and its performance is compared against that of the rectangular counterpart. Some experimental results are also reported.