gebhart/patrepeval huggingface dataset:
Piezoluminescence from ferroelectric Ca_3Ti_2O_7:Pr^3+ long-persistent phosphor (2017)

A variety of up-and-coming applications of piezoluminescence in artificial skins, structural health diagnosis, and mechano-driven lightings and displays recently have triggered an intense research effort to design and develop new piezoluminescent materials. In this work, we deduced and verified an efficient piezoluminescence in ferroelectric Ca<sub>3</sub>Ti<sub>2</sub>O<sub>7</sub>:Pr<sup>3+</sup> long-persistent phosphor, in view of three fundamental elements forming piezoluminescence - piezoelectricity, luminescent centers and carrier traps. Under the stimulation of mechanical actions including compression and friction, Ca<sub>3</sub>Ti<sub>2</sub>O<sub>7</sub>:Pr<sup>3+</sup> shows an intense red emission from <sup>1</sup>D<sub>2</sub>-<sup>3</sup>H<sub>4</sub> transition of Pr<sup>3+</sup>. On the basis of investigations on structural and optical characteristics especially photoluminescence, persistent luminescence and thermoluminescence, we finally proposed a possible piezoluminescent mechanism in Ca<sub>3</sub>Ti<sub>2</sub>O<sub>7</sub>:Pr<sup>3+</sup>. Our research is expected to expand the horizon of existing piezoluminescent materials, accelerating the development and application of new materials.
Optimization research on intersection structure for improving passing capacity by reducing passing quadrant (2009)

As a widely available technology in China, the way of multi-quadrant optimized control which dividing plane traffic by time can improve the order and security in urban intersections. However, this method delays traffic and reduces passing capacity in urban intersections. Based on the actual situation of the main urban streets which have at least 6 lanes and 80% of the vehicles are small ones in China, this paper presented a novel method though setting up auxiliary traffic lights and turning-around control zones, so that 4-quadrant passing can be changed into 2-quadrant passing. The new method can greatly reduce waiting time and energy consumption of vehicles and improve passing capacity in intersections.
Lead poisoning--a hazard of traffic and industries in Pakistan. (1995)

We measured blood lead level, hemoglobin, and urinary amino-levulinic acid (ALA) in industrial workers and in individuals exposed to vehicle smoke. Industrial workers and people exposed to traffic smoke had comparatively higher blood lead levels than the controls (p < 0.0001). Similarly, urinary ALA was 3.82 mg/dL in industrial subjects, 3.68 mg/dL in traffic-exposed people, and 0.8 mg/dL in control subjects (p < 0.001). The hemoglobin level was lower in the industrial group and in the traffic exposure group compared with the control group (p < 0.01). Traffic smoke-exposed persons, such as traffic police staff, had higher blood lead level than those handling lead material, Government Transport Service (GTS) workshop staff. The length of exposure showed no relationship with the lead levels. However, a positive correlation was observed between the duration of exposure and urinary ALA in both sample groups. The major signs and symptoms of the population studied included headache, generalized body pain, hypertension, and depression.
Analytical Modeling of Losses for High Frequency Planar LCT Components (2015)

Abstract-- Passive components occupy a major part of the volume of power electronic converters. Therefore to increase the converter power density, designers have to carefully reduce the size of these components. The integrated planar inductor-capacitor-transformer, already known as LCT component can achieve this goal. Volume optimization of this component requires an accurate analytical modeling of overall losses (including magnetic, copper and the dielectric parts). However, common methods could not be used for high frequency planar components. In the first part of this paper, we introduce the principle and applications of LCT components. In the second part, we present an analytical electromagnetic and electrostatic modeling for high frequency planar components- the lumped elements equivalent circuit method. This method has been developed for components having simple geometries. The efficient application of this method to the complex geometry of LCT is showed in the third part. Index Terms – Integrated passive components, HF passive components, LCT components, planar components, losses modeling, LEEC method.
High Frequency Surface Acoustic Wave Filter Using ZnO/Diamond/Si Structure (1994)

Diamond films grown by chemical vapor deposition (CVD) method is receiving much attention as surface acoustic wave (SAW) substrate material, due to its remarkable characteristics of large SAW velocity to offer much attraction in fabrication of high frequency SAW devices. The basic properties of SAW propagating in a ZnO/diamond/Si structure were studied utilizing thin film poly-crystalline diamond. Phase velocity, group velocity, electro-mechanical coupling coefficient ( K 2 ), and temperature coefficient of frequency ( TCF ) were examined by experiments and theoretical calculations. And it was confirmed that this structure provides high phase velocity up to 10000 m/s, high K 2 up to 4.8% and pratical TCF value of -28 ppm/° C. An 1.3 GHz SAW filter of a ZnO/diamond/Si structure was fabricated for the first time.
Optimization of Closed-Loop Adaptive-Optics Control Algorithms Using Measured Performance Data: Experimental Results (1996)

Experiments have shown the reward adaptive-optics provides in improving the resolution of ground-based astronomical telescopes [1,2,3]. A critical contributor to adaptive-optics system performance is the control algorithm that converts wavefront sensor (WFS) measurements into the deformable mirror (DM) actuator commands. For the adaptive-optics systems in use today this control algorithm consists of a wavefront reconstruction step to estimate the instantaneous phase distortion to be compensated [4], followed by a servo control law to temporally filter this instantaneous estimate before it is applied to the deformable mirror [5]. So-called modal adaptive-optics systems can apply different temporal filters to separate spatial components, or modes, of the overall phase distortion [6]. Extensive analysis has been performed to evaluate and optimize the performance of these adaptive-optics control systems [7,8,9,10,11], but the results obtained depend on atmospheric parameters which are seldom known exactly and are constantly fluctuating. The uncertainty and variability of atmospheric conditions implies that an optimal degree of turbulence compensation cannot be achieved or maintained for long time intervals with a fixed control algorithm. A need exists for methods to update adaptive-optics control algorithms based upon actual system performance. Encouraging results have already been obtained demonstrating the value of emperically optimizing the control bandwidths for a modal adaptive-optics system [12]. In comparison, the subject of real-time adjustments to reconstruction matrices on the basis of measured system performance has received little attention.
Ultrasound-guided sacroiliac joint injection in patients with established sacroiliitis: precise IA injection verified by MRI scanning does not predict clinical outcome (2009)

These results demonstrate that IA SIJ injections remain technically challenging despite ultrasound guidance. However, peri-articular deposition of triamcinolone appears sufficient for pain and symptom control in patients suffering from active sacroiliitis.
Mutational Pathway Determines Whether Drug Gradients Accelerate Evolution of Drug-Resistant Cells (2012)

Drug gradients are believed to play an important role in the evolution of bacteria resistant to antibiotics and tumors resistant to anticancer drugs. We use a statistical physics model to study the evolution of a population of malignant cells exposed to drug gradients, where drug resistance emerges via a mutational pathway involving multiple mutations. We show that a nonuniform drug distribution has the potential to accelerate the emergence of resistance when the mutational pathway involves a long sequence of mutants with increasing resistance, but if the pathway is short or crosses a fitness valley, the evolution of resistance may actually be slowed down by drug gradients. These predictions can be verified experimentally, and may help to improve strategies for combating the emergence of resistance.
Automated segmentation of changes in FLAIR-hyperintense white matter lesions in multiple sclerosis on serial magnetic resonance imaging (2019)

Longitudinal analysis of white matter lesion changes on serial MRI has become an important parameter to study diseases with white-matter lesions. Here, we build on earlier work on cross-sectional lesion segmentation; we present a fully automatic pipeline for serial analysis of FLAIR-hyperintense white matter lesions. Our algorithm requires three-dimensional gradient echo T1- and FLAIR- weighted images at 3 Tesla as well as available cross-sectional lesion segmentations of both time points. Preprocessing steps include lesion filling and intrasubject registration. For segmentation of lesion changes, initial lesion maps of different time points are fused; herein changes in intensity are analyzed at the voxel level. Significance of lesion change is estimated by comparison with the difference distribution of FLAIR intensities within normal appearing white matter. The method is validated on MRI data of two time points from 40 subjects with multiple sclerosis derived from two different scanners (20 subjects per scanner). Manual segmentation of lesion increases served as gold standard. Across all lesion increases, voxel-wise Dice coefficient (0.7) as well as lesion-wise detection rate (0.8) and false-discovery rate (0.2) indicate good overall performance. Analysis of scans from a repositioning experiment in a single patient with multiple sclerosis did not yield a single false positive lesion. We also introduce the lesion change plot as a descriptive tool for the lesion change of individual patients with regard to both number and volume. An open source implementation of the algorithm is available at http://www.statistical-modeling.de/lst.html.
Nasal specific technique as part of a chiropractic approach to chronic sinusitis and sinus headaches. (1995)

The nasal specific technique, when used in conjunction with other therapies, may be useful in treating chronic sinus inflammation and pain. Further investigation is needed to identify the usefulness of the nasal specific technique as an independent intervention, the use of the technique in other types of patients and presentations, and the mechanism of therapeutic benefit.
Efficient Synthesis of New 8-Aryl Tricyclic Pyridinones (2006)

New tricyclic pyridinones were synthesized from 6-bromo-2-chloromethyl-3-nitroimidazo[1,2-a]pyridine in four steps involving a Suzuki-Miyaura cross-coupling reaction and a direct olefination with diethyl ketomalonate as key steps. Subsequent one-pot reduction-cyclization provided new ethyl 8-aryl-2-oxo-1,2-dihydrodipyrido[1,2-a;3′,2′-d]imidazole-3-carboxylates.
Synthetic localized calcium transients directly probe signalling mechanisms in skeletal muscle (2012)

The contribution of Ca2+-induced Ca2+ release (CICR) to trigger muscle contraction is controversial. It was studied on isolated muscle fibres using synthetic localized increases in Ca2+ concentration, SLICs, generated by two-photon photorelease from nitrodibenzofuran (NDBF)-EGTA just outside the permeabilized plasma membrane. SLICs provided a way to increase cytosolic [Ca2+] rapidly and reversibly, up to 8 μM, levels similar to those reached during physiological activity. They improve over previous paradigms in rate of rise, locality and reproducibility. Use of NDBF-EGTA allowed for the separate modification of resting [Ca2+], trigger [Ca2+] and resting [Mg2+]. In frog muscle, SLICs elicited propagated responses that had the characteristics of CICR. The threshold [Ca2+] for triggering a response was 0.5 μM or less. As this value is much lower than concentrations prevailing near channels during normal activity, the result supports participation of CICR in the physiological control of contraction in amphibian muscle. As SLICs were applied outside cells, the primary stimulus was Ca2+, rather than the radiation or subproducts of photorelease. Therefore the responses qualify as ‘classic' CICR. By contrast, mouse muscle fibres did not respond unless channel-opening drugs were present at substantial concentrations, an observation contrary to the physiological involvement of CICR in mammalian excitation–contraction coupling. In mouse muscle, the propagating wave had a substantially lower release flux, which together with a much higher threshold justified the absence of response when drugs were not present. The differences in flux and threshold may be ascribed to the absence of ryanodine receptor 3 (RyR3) isoforms in adult mammalian muscle.
BACTERIA AND PARASITIC PATHOGENS IN CONDITIONS OF CHEMICAL POLLUTION OF WATER FROM SURFACE WATER BODIES (2019)

There were identified priority pollutants in water of the Moscow river below the city (petroleum products, lead, cadmium, zinc, copper; anionic surfactants), which can affect the natural microbiocenosis of surface water. The presence in surface waters heavy metals - cadmium in a concentration of 4 MPC for fishery purposes, of lead at a concentration of 5 MPC for fishery purposes, oil at a concentration of 49 MPC, zinc at a concentration of 10 MPC for fishery purposes, anionic surfactants at the concentrations below the MPC, and also at excess of MPC by 5 times for chlorides, nitrites and nitrates to a large extent was established to affect the viability of indicator bacteria - coliforms, E. coli, enterococci, while maintaining in the water of pathogenic bacteria - Salmonella and parasitic pathogens living Entamoebae spp. and cystic viable vegetative forms of pathogenic protozoa Flagellata spp. and viable helminth eggs Larvae spp.
Escherichia coli NusG links the lead ribosome with the transcription elongation complex (2019)

Abstract It has been known for more than 50 years that transcription and translation are physically coupled in bacteria, but whether or not this coupling may be mediated by the two-domain protein N-utilization substance (Nus) G in Escherichia coli is still heavily debated. Here, we combine integrative structural biology and functional analyses to provide conclusive evidence that NusG can physically link transcription with translation by contacting both RNA polymerase and the ribosome. We present a cryo-electron microscopy structure of a NusG:70S ribosome complex and nuclear magnetic resonance spectroscopy data revealing simultaneous binding of NusG to RNAP and the intact 70S ribosome, providing the first direct structural evidence for NusG-mediated coupling. Furthermore, in vivo reporter assays show that recruitment of NusG occurs late in transcription and strongly depends on translation. Thus, our data suggest that coupling occurs initially via direct RNAP:ribosome contacts and is then mediated by NusG.
Aryl/hetero-arylethyne bridged dyes: the effect of planar π-bridge on the performance of dye-sensitized solar cells (2010)

We have designed and synthesized three metal-free sensitizers consisting of dimethoxy-substituted triphenylamine as donor, cyanoacrylic acid as acceptor with planar π-bridge. The photon to current conversion efficiency of these dyes were measured as sensitizers for DSSCs analysis. The results obtained from these experiments show that the overall conversion efficiency of D3 gave the highest overall efficiency 4.98% with short circuit current density (Jsc) of 11.29 mA cm−2, an open-circuit voltage (Voc) of 0.637 V and a fill factor of 69.2% under standard global AM 1.5 solar conditions. In addition, the experimental results show that π-conjugated bridge can extend the absorption of dye molecular and strong planarity (close-packing) can suppress the charge recombination at TiO2/electrolyte interface. Hence, the donor-π bridge-acceptor architectures can generate a unidirectional current flow, to some extent, which can enhance the cell performance.
Adaptive Optics Scanning Laser Ophthalmoscopy and Multimodal Imaging of Peau D'Orange in Pseudoxanthoma Elasticum (2017)

A 41-year-old male with pseudoxanthoma elasticum who presented with progressive vision loss in his left periphery is discussed. Bilateral angioid streaks, optic disc drusen, choroidal neovascularization, and peau d'orange were present. Imaging of the area with peau d'orange with adaptive optics scanning laser ophthalmoscopy and en face optical coherence tomography at Bruch's membrane (BM) revealed a pattern identical to the patches of peau d'orange visible with conventional fundus imaging techniques. These results show that structural abnormalities at the level of BM, likely a result of calcification, correlate with the characteristic "orange peel" pattern known as peau d'orange. [Ophthalmic Surg Lasers Imaging Retina. 2017;48:436-440.].
High Efficiency and Linear Dual Chain Power Amplifier without/with Automatic Bias Current Control for CDMA Handset Applications (2004)

New architectures of the dual chain InGaP MMIC power amplifiers without/with automatic bias current control (ABC2) have been developed for improving efficiency in the low-power region while maintaining the high linearity for all Pout regions. For low standby current less than 25 mA, the amplifiers initially operate using small HBT arrays. For small chip size, high load impedance in low-power region, and efficient power combining in high-power region, phase-compensating L-C matching circuits using lowpass and high-pass networks are used. A new simple power detection and bias current control circuit is employed to the power amplifier, resulting in automatic gain control for Pout variation. The fabricated ABC2 power amplifier module shows good ACPR more -48 dBc over all Pouts, and high efficiency of 6 % PAE (conventional 3.5~4%) at Pout=9 dBm, and 37.5 % PAE at Pout=28 dBm.
Bovine Type I Collagen as an Endovascular Stent-Graft Material: Biocompatibility Study in Rabbits (2000)

Type I collagen as a intravascular stent-graft material is biocompatible for at least 3 months in rabbits. It is rapidly endothelialized and does not cause reactive stenosis. As a versatile and biocompatible polymer, collagen is potentially useful in the construction of endovascular stent-grafts for use in human arteries.
Measurement of Concentration Profiles during Electrodeposition of Li Metal from LiPF[sub 6]-PC Electrolyte Solution (2007)

During Li metal electrodeposition from a electrolyte solution onto a horizontal Li metal electrode, the refractive index profile corresponding to the concentration profile of ion near the cathode was measured in situ by holographic interferometry. The concentration gradient around the rapidly growing dendrite arms is steeper than at the cathode plane, clearly reflecting the local current density convergence at the dendrite tips and arms. As in a solution, an incubation period was observed between the start of current passage and the onset of the refractive index fringe shift. It increases with decreasing applied current density. The incubation period in is shorter than that in at current densities greater than ; however, at in electrolyte solution it is appreciably longer than in . This complicated behavior is apparently due to the solution chemistry of electrolyte, which produces HF and oxyfluoride impurities that are lacking in the system. Thus, the different current dependence of the incubation time in these two systems may yield clues for an elucidation of the dynamics of solid electrolyte interphase formation.
Simple Sequence Repeat Markers Linked to the Soybean Rps Genes for Phytophthora Resistance (2001)

Simple sequence repeat (SSR) markers with linkages to the Rps1 , Rps2 , Rps3 , Rps4 , Rps5 , and Rps6 loci that govern soybean [ Glycine max (L.) Merr.] resistance to Phytophthora root rot (caused by Phytophthora megasperma Drechs. f. sp. glycinea Kuan and Ervin) are desired. Near‐isogenic lines (NILs) of Clark or Williams, homozygous resistant ( RpsRps ) at just one of those Rps loci, were mated to a NIL of Harosoy homozygous susceptible ( rpsrps ) at all six loci. From the 100 to 120 F 2:3 progenies per mating, 20 F 3 seedlings were evaluated for resistance (R) or susceptibility (S) following inoculation with the race of P. megasperma affected by the segregating Rps allele. About 15 RpsRps and 15 rpsrps F 2 individuals were used to construct contrasting DNA bulks. Presumptive linkage (i.e., SSR marker polymorphism between two bulks) was confirmed or refuted by SSR assay of 15 to 40 F 2 individuals within each homozygous class. Recombination values were maximum likelihood estimates from the SSR allelic segregation data of both classes, although the rpsrps class was less prone to phenotypic classification error. SSRs on linkage groups (LGs) N, J, F, and G were identified with linkages to Rps1 , Rps2 , Rps3 , and Rps4 , respectively. A skewed R:S segregation in the Rps5 population precluded detection of linked SSRs. The Rps6 locus, whose map position was heretofore unknown, was linked with three SSRs in a region of LG‐G that contains Rps4 and Rps5 SSR– Rps linkages of P &lt; 0.05 could only be identified for the Rps1 alleles because of a paucity of SSR markers and/or parental monomorphism in the genomic regions surrounding other Rps loci.
Determination of optimal growth parameters for the bioincising fungusPhysisporinus vitreusby means of response surface methodology (2009)

Implementation of these results should contribute towards the optimization and efficiency of bioincising.
Grouping of orally ingested silica nanomaterials via use of an integrated approach to testing and assessment to streamline risk assessment (2022)

The information generated by the tested oral IATAs can be effectively used for similarity assessment to support a grouping decision upon the application of a hypothesis related to toxicity in the gastrointestinal tract. The IATAs facilitated a structured data analysis and, by means of the expert's interpretation, supported read-across with the available in vivo data. The IATAs also supported the users in decision making, for example, reducing the testing when the grouping was well supported by the evidence and/or moving forward to advanced testing (e.g., the use of more suitable cellular models or chronic exposure) to improve the confidence level of the data and obtain more focused information.
Low speed airfoil design and analysis (1979)

A low speed airfoil design and analysis program was developed which contains several unique features. In the design mode, the velocity distribution is not specified for one but many different angles of attack. Several iteration options are included which allow the trailing edge angle to be specified while other parameters are iterated. For airfoil analysis, a panel method is available which uses third-order panels having parabolic vorticity distributions. The flow condition is satisfied at the end points of the panels. Both sharp and blunt trailing edges can be analyzed. The integral boundary layer method with its laminar separation bubble analog, empirical transition criterion, and precise turbulent boundary layer equations compares very favorably with other methods, both integral and finite difference. Comparisons with experiment for several airfoils over a very wide Reynolds number range are discussed. Applications to high lift airfoil design are also demonstrated.
Einstein's Researches on the Nature of Light* (1979)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text EMIL WOLF, "Einstein's Researches on the Nature of Light*," Optics News 5(1), 24-39 (1979) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article