gebhart/patrepeval huggingface dataset:
Computational identification of a phospholipidosis toxicophore using 13C and 15N NMR-distance based fingerprints (2014)

Modified 3D-SDAR fingerprints combining (13)C and (15)N NMR chemical shifts augmented with inter-atomic distances were used to model the potential of chemicals to induce phospholipidosis (PLD). A curated dataset of 328 compounds (some of which were cationic amphiphilic drugs) was used to generate 3D-QSDAR models based on tessellations of the 3D-SDAR space with grids of different density. Composite PLS models averaging the aggregated predictions from 100 fully randomized individual models were generated. On each of the 100 runs, the activities of an external blind test set comprised of 294 proprietary chemicals were predicted and averaged to provide composite estimates of their PLD-inducing potentials (PLD+ if PLD is observed, otherwise PLD-). The best performing 3D-QSDAR model utilized a grid with a density of 8ppm×8ppm in the C-C region, 8ppm×20ppm in the C-N region and 20ppm×20ppm in the N-N region. The classification predictive performance parameters of this model evaluated on the basis of the external test set were as follows: accuracy=0.70, sensitivity=0.73 and specificity=0.66. A projection of the most frequently occurring bins on the standard coordinate space suggested a toxicophore composed of an aromatic ring with a centroid 3.5-7.5Å distant from an amino-group. The presence of a second aromatic ring separated by a 4-5Å spacer from the first ring and at a distance of between 5.5Å and 7Å from the amino-group was also associated with a PLD+ effect. These models provide comparable predictive performance to previously reported models for PLD with the added benefit of being based entirely on non-confidential, publicly available training data and with good predictive performance when tested in a rigorous, external validation exercise.
Fabrication of photonic crystal lasers by MBE air-hole retained growth (2014)

We report the fabrication of photonic crystal surface-emitting lasers using an MBE air-hole retained growth method. We demonstrate the achievement of single-mode oscillation and observe a single-lobed, linearly polarized beam. We also use three-dimensional coupled wave analysis to calculate the effects of using different air-hole shapes, which determine the beam shape and polarization. A single-lobed, linearly polarized beam can be obtained by modifying the air holes from circular to a tilted-corn shape after growth.
Effect of nitric oxide annealing on the interface trap density near the conduction bandedge of 4H–SiC at the oxide/(1120) 4H–SiC interface (2004)

Nitric oxide postoxidation anneal results in a significant decrease of defect state density (Dit) near the conduction bandedge of n-4H–SiC at the oxide/(112̄0) 4H–SiC interface. Comparison with measurements on the conventional (0001) Si-terminated face shows a similar interface state density following passivation. Medium energy ion scattering provides a quantitative measure of nitrogen incorporation at the SiO2/SiC interface.
Reduction of memory footprint and computation time for embedded Support Vector Machine (SVM) by kernel expansion and consolidation (2014)

Support Vector Machines (SVM) are a family of algorithms widely used in classification and regression tasks. When faced with large and structurally complex data sets, the classification or prediction by SVM can become memory and time intensive, and especially so in non-sparse variants of the SVM such as the least-squares SVM (LS-SVM). This is of particular importance for implementing classifiers in embedded systems where memory and computation capabilities are limited. In this paper, decomposition methods for SVM classification functions are developed and discussed, using polynomial approximation methods. The SVM decision function is expanded into a polynomial form and consolidated into classification function with a significantly lower memory footprint and computational cost. The amount of reduction is analyzed for polynomial kernels, and in three demonstrated example systems, the classifier is made two orders of magnitude faster, with a memory requirement that is two orders of magnitude smaller. The methods are tested on standard classification data sets, and guidelines for use of the methods are provided.
Infrared Pump-Probe Imaging and Spectroscopy with 10nm Resolution (2014)

We introduce pump−probe sub-diffraction infrared imaging and spectroscopy with 100fs temporal and 10nm spatial resolution. On graphene single-layers, we demonstrate time-resolved access to local optical conductivity at technologically relevant mid-infrared frequencies.
Field-oriented control of induction motors with direct rotor current estimation (2004)

This paper demonstrates the implementation of field-oriented control and rotor current estimation of an induction machine. A mathematical model was developed in Matlab/Simulink. A control system was implemented on a three-phase wound field induction motor to confirm the proposed method and estimated rotor currents. A dSPCAE embedded real time controller is used to implement the control and experimental results have been obtained to confirm the proposed method
The Accuracy of Radio Direction Finding in the Extremely Low Frequency Range (2017)

Abstract In this work, we study the accuracy of direction finding in the extremely low frequency (ELF) range using a newly installed broadband receiver equipped with two active magnetic antennas. The main natural source of ELF radio waves is lightning. In this work, we analyzed 1000 atmospheric discharges at distances of up to 5000 km from the receiver. We identified the most important factors influencing the accuracy of the angle of arrival: the deviation of the radio waves propagating through the day‐night terminator zone and the signal‐to‐noise ratio resulting from local electromagnetic noise and Schumann resonance background. The obtained results clearly show that the accuracy of estimating the direction of arrival is very high (an average error of 0.1° with the standard deviation of 2.3°) when the signal‐to‐noise ratio is large (the amplitude of the magnetic field component above 100 pT), except for short periods in the local morning and evening, when the day‐night terminator is present on the propagation path of the direct wave. For the day‐night propagation paths, the refraction angle was larger than the incidence angle, and for the night‐day propagation paths, the refraction angle was smaller than the incidence angle, which is consistent with theory. Using our analytical ELF radio propagation model allowed us to explain the obtained results.
Infarcissement Musculaire Tumoriforme Chez Le Diabetique: Etude Anatomoclinique D’Un Cas et Revue (1984)

SummaryThe muscular infarction without any phenomenon of gangrene is an unfrequent complication of diabetes mellitus.Clinically, the disease is revealed by a pain and a jnuscular local swelling. The spontaneous evolutions favorable except a tendancy to homoor heterolateral recurrence.The autors report a case documented with recent techniques of investigation (echography, digitalized arteriography, CT scan) and compare it with five °ther cases previously described in the literature. A Particular stress is laid on iconographic recent Weans of diagnosis which allow to avoid invasive techniques of investigation or hazardous therapeutic approach.
Characterization of Archaeal Group II Chaperonin-ADP-Metal Fluoride Complexes (2005)

Group II chaperonins, found in Archaea and in the eukaryotic cytosol, act independently of a cofactor corresponding to GroES of group I chaperonins. Instead, the helical protrusion at the tip of the apical domain forms a built-in lid of the central cavity. Although many studies on the lid's conformation have been carried out, the conformation in each step of the ATPase cycle remains obscure. To clarify this issue, we examined the effects of ADP-aluminum fluoride (AlFx) and ADP-beryllium fluoride (BeFx) complexes on alpha-chaperonin from the hyperthermophilic archaeum, Thermococcus sp. strain KS-1. Biochemical assays, electron microscopic observations, and small angle x-ray scattering measurements demonstrate that alpha-chaperonin incubated with ADP and BeFx exists in an asymmetric conformation; one ring is open, and the other is closed. The result indicates that alpha-chaperonin also shares the inherent functional asymmetry of bacterial and eukaryotic cytosolic chaperonins. Most interestingly, addition of ADP and BeFx induced alpha-chaperonin to encapsulate unfolded proteins in the closed ring but did not trigger their folding. Moreover, alpha-chaperonin incubated with ATP and AlFx or BeFx adopted a symmetric closed conformation, and its functional turnover was inhibited. These forms are supposed to be intermediates during the reaction cycle of group II chaperonins.
Microfluidic Transport and Sensing of Functionalized Superparamagnetic Beads with Integrated Spin-Valves | NIST (2011)

This work describes a novel microfluidic platform to trap, release, transport, and detect superparamagnetic beads (SPBs) with magnetic spin-valves (SVs). This new technique for simultaneous SPB manipulation and detection was demonstrated on a linear array of bistable 1 µm × 8 µm bottom-pin SVs (~3% giant magnetoresistance (GMR) ratio) addressed locally with read and write lines. We successfully transported, trapped, and detected a single 2.8 µm diameter SPB. During detection, the SPB was magnetized with an in-plane +9 mT field perpendicular to the SV’s easy axis.
Laser spectroscopy of supersonic molecular beams: Application to the NO2 spectrum (1974)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation R. E. Smalley, B. L. Ramakrishna, D. H. Levy, L. Wharton; Laser spectroscopy of supersonic molecular beams: Application to the NO2 spectrum. J. Chem. Phys. 15 November 1974; 61 (10): 4363–4364. https://doi.org/10.1063/1.1681747 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioThe Journal of Chemical Physics Search Advanced Search |Citation Search
A bionic approach to cardiovascular regulation: bionic arterial baroreflex system (2005)

A bionic system is an artificial device, integrated into natural human physiology by communicating with the native regulatory system. This can functionally operate as if it were a part of the body. Bionic systems can be realized only with the knowledge of detailed characteristics of the native system. We made use of a "white-noise approach" and have succeeded in functionally identifying the native arterial baroreflex. Using thus identified characteristics, we developed a bionic baroreflex system. Animal experiments in rats revealed that the bionic baroreflex system can stabilize pressure against hypotensive stimuli such as head-up tilt even without the native baroreflex system.
Pre-mRNA splicing in the absence of an SR protein RS domain (2000)

SR proteins are essential pre-mRNA splicing factors that act at the earliest stages of splice-site recognition and spliceosome assembly, as well as later in the splicing pathway. SR proteins consist of one or two RNA-recognition motifs and a characteristic arginine/serine-rich C-terminal RS domain. The RS domain, which is extensively phosphorylated, mediates the subcellular localization of individual SR proteins and also functions as a splicing activation module, apparently by engaging in protein-protein interactions. The RS domain of SF2/ASF is dispensable for the concentration-dependent effects of this SR protein on alternative splice-site selection. However, this RS domain is highly conserved phylogenetically, and was shown to be required for constitutive splicing in vitro and for cell viability. Here, we demonstrate that the RS domain of SF2/ASF is, in fact, dispensable for splicing of several substrates, including constitutive and enhancer-dependent pre-mRNAs. The requirement for this RS domain is substrate specific, and correlates with the strength of the splicing signals. When the 3' splice site is weak, both the SF2/ASF RS domain and U2AF(35) are required for splicing. These results show the existence of an RS domain-independent function of SR proteins in constitutive and enhancer-dependent splicing, and suggest mechanisms for their role in enhancer function besides U2AF recruitment.
Suppl Fig 6 from Intrathecal Viral Vector Delivery of Trastuzumab Prevents or Inhibits Tumor Growth of Human HER2-Positive Xenografts in Mice (2023)

&lt;p&gt;IT AAV9.trastuzumab tumor prophylaxis in NOD scid gamma mice&lt;/p&gt;
Constitutive Cyclic Deformation Behavior in Single-crystal and Directionally Solidified SSME High-pressure Fuel Turbopump Airfoil Materials (1985)

The major goal of the project is to correlate mechanical properties with microstructural deformation behavior and to develop models for constitutive response under a variety of monotonic and cyclic loading cycles, temperatures, strain levels, strain rates, and environments. Two alloys are being studied as candidate SSME turbine blade materials. The first is PWA 1480, which is a single-crystal alloy whose nominal composition is reported. The second alloy being studied is D.S. Mar-M 246 + Hf. This is a directionally solidified material, and its nominal composition is also reported. The major areas of interest for the two materials will be slightly different. The single-crystal alloy lends itself well to fundamental deformation studies, since resolved shear stresses on slip planes are all known and only one grain is present. The D.S. material presents an excellent opportunity to study the effects of slightly misaligned grains on deformation behavior. The two materials will be studied by using approximately the same test matrix, so a good degree of direct comparison will also be possible.
Superparamagnetic iron oxide (SPIO) labeling efficiency and subsequent MRI tracking of native cell populations pertinent to pulmonary heart valve tissue engineering studies (2011)

The intimal and medial linings of the pulmonary artery consist largely of vascular endothelial cells (VECs) and vascular smooth muscle cells (VSMCs), respectively. The migration of these cell types to a potential tissue-engineered pulmonary valve (TEPV) implant process is therefore of interest in understanding the valve remodeling process. Visualization and cell tracking by MRI, which employs hypointense contrast achievable through the use of superparamagnetic iron oxide (SPIO) microparticles to label cells, provides a method in which this can be studied. We investigated the SPIO labeling efficiency of human VECs and VSMCs, and used two- and three-dimensional gradient echo sequences to track the migration of these cells in agar gel constructs. Protamine sulfate (4.5 µg/mL) was used to enhance SPIO uptake and was found to have no influence on cell viability or proliferation. MRI experiments were initially performed using a 9.4-T scanner. The results demonstrated that the spatial positions of hypointense spots were relatively unchanged over 12 days. Subsequent MR experiments performed at 7 T demonstrated that three-dimensional imaging provided the best spatial resolution to assess cell fate. R(2)* maps were bright in SPIO cell-encapsulated gels in comparison with unlabeled counterparts. Signal voids were ruled out as hypointense regions owing to the smooth exponential decay of T(2)* in these voxels. As a next step, we intend to use the SPIO cell labeling and MR protocols established in this study to assess whether hemodynamic stresses will alter the vascular cell migratory patterns. These studies will shed light on the mechanisms of vascular remodeling after TEPV implantation.
Low-cost fiber optic sensor array for simultaneous detection of hydrogen and temperature (2018)

Monitoring the dissolved gases and oil temperatures are the most responsive and dependable strategies of assessing the running state and health of power transformers. Novel fiber optic sensor approaches that minimize the footprint and cost of chemical sensors compatible with electrical asset insulation oil monitoring can ultimately allow the deployment on a broader range of power assets. Fiber optic sensor arrays based on nanocomposite thin films for simultaneous gas and temperature sensing at low temperatures have been fabricated. The performance of the sensor array was evaluated with two sensing elements comprised of Pd and Au nanoparticle incorporated SiO<sub>2</sub> thin films, which were deposited onto a coreless fiber by dip-coating in series and then fusion-spliced with two multimode fibers on either end. Such fiber optic sensor array showed monotonic responses over a wide range of H<sub>2</sub> at ambient conditions. A response of the localized surface plasmon resonance absorption peak of Au to changing temperatures from ambient to 110 &deg;C was observed. Optical responses of H2 and temperatures showed opposite directions in transmission signals, which were evaluated by using principal component analysis (PCA). The resulting PCA score plot clearly shows discrimination between the characteristic signal of H<sub>2</sub> gas and temperature. In order to realize potential field deployment, the optical testing system employed low-cost components such as LEDs as fixedwavelength light sources and silicon photodiodes as detectors. The potential applications of such sensor arrays are dual-purpose gas and temperature sensing for on-site deployment in power transformers and other grid asset health monitoring.
Phosphor-Free Apple-White LEDs with Embedded Indium-Rich Nanostructures Grown on Strain Relaxed Nano-epitaxy GaN (2010)

Phosphor-free apple-white light emitting diodes have been fabricated using a dual stacked InGaN/GaN multiple quantum wells comprising of a lower set of long wavelength emitting indium-rich nanostructures incorporated in multiple quantum wells with an upper set of cyan-green emitting multiple quantum wells. The light-emitting diodes were grown on nano-epitaxially lateral overgrown GaN template formed by regrowth of GaN over SiO(2) film patterned with an anodic aluminum oxide mask with holes of 125 nm diameter and a period of 250 nm. The growth of InGaN/GaN multiple quantum wells on these stress relaxed low defect density templates improves the internal quantum efficiency by 15% for the cyan-green multiple quantum wells. Higher emission intensity with redshift in the PL peak emission wavelength is obtained for the indium-rich nanostructures incorporated in multiple quantum wells. The quantum wells grown on the nano-epitaxially lateral overgrown GaN has a weaker piezoelectric field and hence shows a minimal peak shift with application of higher injection current. An enhancement of external quantum efficiency is achieved for the apple-white light emitting diodes grown on the nano-epitaxially lateral overgrown GaN template based on the light -output power measurement. The improvement in light extraction efficiency, η(extraction,) was found to be 34% for the cyan-green emission peak and 15% from the broad long wavelength emission with optimized lattice period.
Deterministic Broad-Band PMD Emulator (2004)

We present the architecture for a deterministic broad-band polarization-mode dispersion (DBPMD) emulator based on four stages. The first three stages of flexible frequency-dependent rotation provide the three degrees of freedom for emulating PMD at each frequency, while the fourth stage compensates for the isotropic dispersion created by the first three stages. We describe the algorithm to synthesize the required rotation angle of each stage using the PMD concatenation rules. Using numerical simulations, we demonstrate good fidelity of the DBPMD emulator in approximating randomly selected spectra of PMD vectors.
Experimental studies on the radiation-modifying effect of bleomycin in malignant and normal mouse tissue in vivo. (1981)

The interaction between bleomycin (BLM) and radiation was studied in a C3H mammary carcinoma and its surrounding normal skin. In the skin, single and fractionated doses of sequential treatment with BLM (25 mg/kg) 24 hours prior to radiation therapy did not influence the response to irradiation, whereas simultaneous treatment with BLM given 15 minutes before radiation therapy enhanced the reaction to irradiation by a factor of 1.2 or 1.4 following treatment with one fraction or five fractions, respectively. The tumor response to irradiation was not influenced by a single sequential treatment, but five daily fractions of radiation therapy following five daily dose fractions of BLM increased the radiation dose needed to control 50% of the tumors, probably because the tumors continued to grow during the BLM treatment. Simultaneous treatment enhanced the response to irradiation by a factor of 1.2 after both single-dose and fractionated therapy. Based on these data it was concluded that none of the combined treatment schedules were able to produce a better therapeutic effect than radiation therapy alone. Furthermore, mortality due to lung fibrosis in mice treated with BLM indicated the marked toxicity of the drug. This toxicity was most pronounced after fractionated treatment and when radiation therapy and BLM were given simultaneously.
Phase I study of humanised antibody A33 (Hua33) in patients with colorectal carcinoma - preliminary whole body clearance and tumour dosimetry (1999)

The study evaluated the safety of humanised antibody A33 (huA33) in patients with colorectal carcinoma, determined the pharmacokinetics, tissue distribution and imaging characteristics of intravenously administered huA33 in these patients and determined the patient's immune response to IV huA33. (non-author abstract)
Calculation of Land Subsidence Induced by Dewatering of Pit Based on Comprehensive Template Model (2012)

Based on the hierarchical summation method of elasticity theory, the comprehensive template model of land subsidence induced by dewatering of pit is put forward. According to the soils experience range of conversion relationship β (between deformation modulus E0 and compression modulus Es ), we can calculate upper and lower limits of Es. When the compression modulus Es is respectively taken upper and lower limit, the curve between falling groundwater values and sedimentation values can be taken in conditions of unit thickness different soils of different pore ratio. So the comprehensive template model is built. The example shows that the comprehensive template model can be effectively calculated land subsidence induced by dewatering of pit.
Droplet Spray Ionization from a Glass Microscope Slide: Real-Time Monitoring of Ethylene Polymerization (2015)

Ambient ionization mass spectrometry is achieved in a simple manner by loading a sample solution onto a corner of a microscope cover glass positioned in front of the inlet to a mass spectrometer and applying a high voltage to the sample. The resulting stream of charged droplets is stable, has no contamination from the substrate platform, and can be used repeatedly. The utility of droplet spray for in situ analysis and real-time monitoring of chemical reactions was demonstrated by the bis(cyclopentadienyl)zirconium dichloride (zirconocene dichloride)/methylaluminoxane, Cp2ZrCl2/MAO, homogeneously catalyzed polymerization of ethylene in various solutions. Reaction times ranged from seconds to minutes, and catalytically active species and polymeric products of ethylene were acquired and identified by tandem mass spectrometry.