gebhart/patrepeval huggingface dataset:
Investigation of electrical properties of Mn doped tin oxide nanoparticles using impedance spectroscopy (2010)

Manganese doped tin oxide nanoparticles with manganese content varying from 0 to 15 mol % were synthesized using sol-gel method. The structural and compositional analysis was carried out using x-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive x-ray analysis (EDAX). Dielectric and impedance spectroscopy was carried out at room temperature to explore the electrical properties of Mn doped SnO2. XRD analysis indicated the formation of single phase rutile type tetragonal structure of all the samples. The crystallite size was observed to vary from 16.2 to 7.1 nm as the Mn content was increased. The XRD, SEM, and EDAX results corroborated the successful doping of Mn in the SnO2 matrix. Complex impedance analysis was used to distinguish the grain and grain boundary contributions to the system, suggesting the dominance of grain boundary resistance in the doped samples. The dielectric constant ε′, dielectric loss tan δ and ac conductivity σac were studied as a function of frequency and composition and the behavior has been explained on the basis of Maxwell–Wagner interfacial model. All the dielectric parameters were found to decrease with the increase in doping concentration. Moreover, it has been observed that the dielectric loss approaches to zero in case of high dopant concentration (9%, 15%) at high frequencies.
Asymmetry in Photoelectron Emission from Chiral Molecules Induced by Circularly Polarized Light (2001)

In photoionization of free, unoriented chiral molecules with circularly polarized radiation, a significant circular dichroism, i.e., an asymmetry in the forward-backward electron emission, has been observed in the photoelectron angular distribution. This leads also to an asymmetry in the momentum transfer to the photoions. The spectra for the left- and right-handed enantiomers of bromocamphor exhibit asymmetries up to several percent which vary as a function of orbital binding energy. This enantioselective effect can similarly occur for biomolecules with handedness, like amino acids, and may thus be a contributing factor related to the origin of the terrestrial biomolecular homochirality.
A novel image retrieval scheme in JPEG2000 compressed domain based on tree distance (2004)

As the new generation standard for static image compression, JPEG2000 employs the wavelet transform instead of DCT in JPEG. JPEG2000 is thus advantageous over JPEG in terms of compression ratio, freedom of compression mode selection and adaptation to different kinds of images. Obviously, there is a tendency for JPEG2000 to take the place of JPEG, and large amount of images are saved in JPEG2000 format in image databases and on the Internet in the near future. So, research on image retrieval realized in JPEG2000 compressed domain has important real significance. In this paper, the data structure in JPEG2000 compressed domain is firstly analyzed. The concept of information tree and a novel tree-distance measurement are then proposed. Finally, we propose a new image retrieval method in JPEG2000 compressed domain. Experimental results show its potential in compressed domain image retrieval techniques.
Evaluation of cable polymer aging through Indenter testing of in-plant and laboratory-aged specimens. Final report (1996)

This report documents the in-plant testing and evaluation of cables through use of the Ogden/EPRI Polymer Aging Monitor (Indenter), a device that allows nondestructive, in-situ evaluation of the aging of electrical cable insulation and jacketing. Descriptions of the Indenter system and theory of operation, an evaluation of the effectiveness of the system during in-plant trials, and a discussion of artificial aging and cable life projection methodology for various types of common nuclear plant cable are provided. Indenter modulus measurements performed on in-service cables at three Commonwealth Edison nuclear stations (Dresden, Zion, and LaSalle) are compared to the artificial aging results, and the service lives of the cable are predicted.
Over-Expression of Bcl-2 Provides Protection in Septic Mice by a <i>trans</i> Effect (2003)

Transgenic mice that over-express B cell leukemia/lymphomas (Bcl)-2 in myeloid cells under control of the human MRP8 promoter (hMRP8-Bcl-2) or in T lymphocytes under the E micro promoter (E micro -Bcl-2) were compared with C57BL/6 control mice following cecal ligation and puncture (CLP). There was a significant difference in outcome between the hMRP8-Bcl-2 and control mice with 100% survival in the hMRP8-Bcl-2 mice vs 25% survival in the control mice. In separate experiments there was a significant difference between E micro -Bcl-2 and control mice with 87.5 and 22.2% survival, respectively. Adoptive transfer of CD11b-positive bone marrow cells from hMRP8-Bcl-2 or C57BL/6 mice to C57BL/6 mice subjected to CLP resulted in 100 and 0% survival, respectively. Adoptive transfer of CD11b-positive cells from either hMRP8-Bcl-2 or C57BL/6 mice to Rag-1(-/-) mice (no mature T or B cells) subjected to CLP resulted in survival of 87.5 and 12.5%, respectively. The hMRP8-Bcl-2 mice had significantly more neutrophils and fewer bacteria in the peritoneum compared with C57BL/6 mice 24 h after CLP. These experiments show that Bcl-2 over-expression is protective in CLP and that protection is independent of lymphocytes. We propose that over-expression of Bcl-2 in T cells or myeloid cells induce release of a molecule(s) that protects against death following CLP.
An endogenous substrate for the insulin receptor-associated tyrosine kinase. (1985)

Insulin binding to its receptor stimulates a tyrosine-specific protein kinase. This enzyme phosphorylates the insulin receptor, as well as a variety of exogenous substrates in vitro. In the present studies, we have identified an endogenous substrate for the insulin receptor-associated kinase. We studied insulin-stimulated protein phosphorylation in partially purified insulin receptor preparations from the livers of dexamethasone-treated rats. In this cell-free system, insulin stimulated the phosphorylation of its own receptor as well as of a phosphoprotein of apparent Mr = 120,000 (termed pp120). pp120 was not immunoprecipitated by three anti-receptor antisera, nor was the receptor immunoprecipitated by antisera raised against pp120, suggesting that pp120 is not antigenically related or tightly bound to the insulin receptor. Dose-response curves for receptor and pp120 phosphorylation stimulated by pork insulin were essentially identical, and showed the appropriate specificity (insulin much greater than proinsulin) for a receptor-mediated event. Phosphoamino acid analysis revealed that insulin stimulated the incorporation of 32P predominantly into tyrosine residues of pp120. Casein, an artificial substrate for the insulin receptor kinase, competed with pp120 for insulin-stimulated phosphorylation. Phosphorylation of pp120 was rapid (half-maximal effect within 2 min at 24 degrees C) and, like receptor phosphorylation, was supported with Mn2+ or Mg2+ as divalent cation and ATP as the phosphate donor. While receptor autophosphorylation and artificial substrate phosphorylation were not altered by prior treatment of the rats with dexamethasone, insulin-stimulated pp120 phosphorylation was enhanced in preparations derived from dexamethasone-treated rats, suggesting an alteration of pp120, not the receptor, as a result of dexamethasone-treatment. Further studies of this newly identified endogenous substrate may help clarify the physiologic role of the insulin receptor-associated kinase.
A Simple Analog Controller for Single-Phase Half-Bridge Rectifier (2007)

A simple analog controller is proposed for the single-phase half-bridge pulsewidth modulation rectifier to maintain near unity power factor at the input and balance the voltages across each half of the dc bus. The controller works in the principle of constant-frequency current programmed control. The required gating pulses are generated by comparing the input current with a linear and bipolar carrier without sensing the input voltage. Two voltage controllers and a single reset-integrator are used to generate the carrier. All the necessary control operations are performed without using any phase locked loop, multiplier, and/or divider circuits. Resistor based sensors are used to measure the voltages across two halves of the dc bus and the input current. The controller can be fabricated as a single integrated circuit. The averaged small signal models and all the necessary design equations are provided. The condition of stability against subharmonic oscillation is analyzed. Calculation of switching and conduction losses is presented. The control concept is validated through simulation and also experimentally on an 800-W half-bridge rectifier. Experimental results are presented for ac-dc application, and also for ac-dc-ac application with both linear and nonlinear loads at two different output fundamental frequencies (50 and 60Hz)
Comparison of Extraintestinal Pathogenic <i>Escherichia coli</i> Strains from Human and Avian Sources Reveals a Mixed Subset Representing Potential Zoonotic Pathogens (2008)

Since extraintestinal pathogenic Escherichia coli (ExPEC) strains from human and avian hosts encounter similar challenges in establishing infection in extraintestinal locations, they may share similar contents of virulence genes and capacities to cause disease. In the present study, 1,074 ExPEC isolates were classified by phylogenetic group and possession of 67 other traits, including virulence-associated genes and plasmid replicon types. These ExPEC isolates included 452 avian pathogenic E. coli strains from avian colibacillosis, 91 neonatal meningitis E. coli (NMEC) strains causing human neonatal meningitis, and 531 uropathogenic E. coli strains from human urinary tract infections. Cluster analysis of the data revealed that most members of each subpathotype represent a genetically distinct group and have distinguishing characteristics. However, a genotyping cluster containing 108 ExPEC isolates was identified, heavily mixed with regard to subpathotype, in which there was substantial trait overlap. Many of the isolates within this cluster belonged to the O1, O2, or O18 serogroup. Also, 58% belonged to the ST95 multilocus sequence typing group, and over 90% of them were assigned to the B2 phylogenetic group typical of human ExPEC strains. This cluster contained strains with a high number of both chromosome- and plasmid-associated ExPEC genes. Further characterization of this ExPEC subset with zoonotic potential urges future studies exploring the potential for the transmission of certain ExPEC strains between humans and animals. Also, the widespread occurrence of plasmids among NMEC strains and members of the mixed cluster suggests that plasmid-mediated virulence in these pathotypes warrants further attention.
Surface Imprinting. Characterization of a Latex Resin and the Origin of the Imprinting Effect (1995)

Abstract In accordance with the concept of Surface Imprinting, as proposed by the present authors, a Cu(II)-imprinted microsphere was studied in detail in order to obtain information about the origin of the imprinting effect. Unimprinted and Cu(II)-imprinted microspheres were prepared under several pH (4.0, 5.0, 5.6, or 6.0) conditions in second-step polymerization. The obtained microspheres were characterized regarding particle form, size-distribution pattern, average diameter, Cu(II) adsorption behavior, and so on. During preparation at pH 4.0—5.6 in the second-step polymerization, imprinted microspheres adsorbed Cu(II) more effectively than did unimprinted microspheres in this pH range, indicating a clear metal-imprinting effect. On the other hand, the imprinting effect was not observed during preparation at pH 6.0, because of the formation of copper(II) hydroxide precipitates. The maximum imprinting effect was provided by microspheres obtained at pH 5.6. Spectroscopic studies were made on Cu(II)-loaded microspheres. The FT-IR spectra suggested that carboxyl groups on the microsphere surface participated in the Cu(II) binding in their ionized carboxylate forms. An FE-SEM (ångstrom SEM) observation of the microsphere indicated a smooth surface structure at the 10 nm level. The collected data indicate that the origin of the imprinting effect on a Cu(II)-imprinted microsphere is the interaction between Cu(II) and the carboxylate group at the aqueous-organic interface, supporting the concept of Surface Imprinting.
Dimensions of object-based language design (1987)

The design space of object-based languages is characterized in terms of objects, classes, inheritance, data abstraction, strong typing, concurrency, and persistence. Language classes (paradigms) associated with interesting subsets of these features are identified and language design issues for selected paradigms are examined. Orthogonal dimensions that span the object-oriented design space are related to non-orthogonal features of real languages. The self-referential application of object-oriented methodology to the development of object-based language paradigms is demonstrated.
Visible light propagation inside free-standing InGaN/GaN quantum-well rib waveguides (2015)

This paper describes a double-side process to fabricate free-standing InGaN/GaN multiple quantum wells (MQWs) rib waveguides on a GaN-on-silicon platform. The large index contrast between GaN and air imposes a strong optical confinement of the rib waveguide structures. When the light is generated from InGaN/GaN MQWs, part of the excited light is guided and propagates within the rib waveguide. Experimental and simulation results show that multiple light losses will reduce the light propagation distance, and back wafer etching of free-standing membrane is an effective way to decrease the light loss and to increase the light propagation distance. The performance of the light propagating inside the orthogonal waveguides illustrates that the rib waveguide structures can be utilized to control the light propagation direction inside the waveguide, which is promising for the development of diverse beam splitters for further integrated photonic circuit in the visible wavelength range.
A Software Development Process for Small Projects (2000)

The authors' development process integrates portions of an iterative, incremental process model with a quality assurance process that assesses each process phase's quality and a measurement process that collects data to guide process improvement. The process's goal is to produce the high quality and timely results required for today's market without imposing a large overhead on a small project.
Ambipolar organic field-effect transistors based on diketopyrrolopyrrole derivatives containing different π-conjugating spacers (2016)

We report the synthesis and characterization of two ambipolar diketopyrrolopyrrole derivatives containing different π-conjugating spacers.
Observation of Electrically-Inactive Interstitials in Nb-Doped SrTiO<sub>3</sub> (2013)

Despite rapid recent progress, controlled dopant incorporation and attainment of high mobility in thin films of the prototypical complex oxide semiconductor SrTiO3 remain problematic. Here, analytical scanning transmission electron microscopy is used to study the local atomic and electronic structure of Nb-doped SrTiO3 both in ideally substitutionally doped bulk single crystals and epitaxial thin films. The films are deposited under conditions that would yield highly stoichiometric undoped SrTiO3, but are nevertheless insulating. The Nb incorporation in such films was found to be highly inhomogeneous on nanoscopic length-scales, with large quantities of what we deduce to be interstitial Nb. Electron energy loss spectroscopy reveals changes in the electronic density of states in Nb-doped SrTiO3 films compared to undoped SrTiO3, but without the clear shift in the Fermi edge seen in bulk single crystal Nb-doped SrTiO3. Analysis of atomic-resolution annular dark-field images allows us to conclude that the interstitial Nb is in the Nb(0) state, confirming that it is electrically inactive. We argue that this approach should enable future work establishing the vitally needed relationships between synthesis/processing conditions and electronic properties of Nb-doped SrTiO3 thin films.
Analytical Formulation of SiO<inf>2</inf>-IL scavenging in HfO<inf>2</inf>/SiO<inf>2</inf>/Si gate stacks - A key is the SiO<inf>2</inf>/Si interface reaction (2014)

The scavenging kinetics of ultra-thin-SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> interface layer (IL) in HfO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /Si stacks is investigated by focusing on SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /Si interface reaction in addition to both O and Si atom kinetics. SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /Si interface serves as a stage that the oxygen vacancy (VO) is converted to Si release from SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> with the help of Si substrate. Based on both diffusion kinetics and possible reaction, an analytical model for two-stage SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -IL scavenging in high-k gate stack is proposed.
Thermal Performance Challenges from Silicon to Systems (2000)

The demand f r high-perf rmance microprocessors has resulted in an escalationof power dissipation as well as heatf lux at the silicon level. At the same time, the desire f or smallerf orm-f actor chassis and lower silicon operating temperatures is compounding the thermal challenge. Thermal designf1 a microprocessor can no longer be treated in isolation. Power andperf--N ance tradeof f s and smart circuit-design techniques are required to conserve power consumption. Materials and process improvements in packaging and heat-sink technology are required to minimize thermal resistance. The concurrent development and packagingof all these elements is critical to ensure that ftj a cost and availability perspective a viable thermal design solution space exists. This paper attempts to address this multidimensional problem, highlighting design and technology challenges encountered in mobile computers, desktops, and servers.
Phenyl 1,2,3-Triazole-Thymidine Ligands Stabilize G-Quadruplex DNA, Inhibit DNA Synthesis and Potentially Reduce Tumor Cell Proliferation over 3′-Azido Deoxythymidine (2013)

Triazoles are known for their non-toxicity, higher stability and therapeutic activity. Few nucleoside (L1, L2 and L3) and non-nucleoside 1,2,3-triazoles (L4-L14) were synthesised using click chemistry and they were screened for tumor cell cytotoxicity and proliferation. Among these triazole ligands studied, nucleoside ligands exhibited higher potential than non-nucleoside ligands. The nucleoside triazole analogues, 3'-Phenyl-1,2,3- triazole-thymidine (L2) and 3'-4-Chlorophenyl-1,2,3-triazole-thymidine (L3), demonstrated higher cytotoxicity in tumor cells than in normal cells. The IC₅₀ value for L3 was lowest (50 µM) among the ligands studied. L3 terminated cell cycle at S, G2/M phases and enhanced sub-G1 populations, manifesting induction of apoptosis in tumor cells. Confocal studies indicated that nucleoside triazole ligands (L2/L3) cause higher DNA fragmentation than other ligands. Preclinical experiments with tumor-induced mice showed greater reduction in tumor size with L3. In vitro DNA synthesis reaction with L3 exhibited higher DNA synthesis inhibition with quadruplex forming DNA (QF DNA) than non quadruplex forming DNA (NQF DNA). T(m) of quadruplex DNA increased in the presence of L3, indicating its ability to enhance stability of quadruplex DNA at elevated temperature and the results indicate that it had higher affinity towards quadruplex DNA than the other forms of DNA (like dsDNA and ssDNA). From western blot experiment, it was noticed that telomerase expression levels in the tissues of tumor-induced mice were found to be reduced on L3 treatment. Microcalorimetry results emphasise that two nucleoside triazole ligands (L2/L3) interact with quadruplex DNA with significantly higher affinity (K(d)≈10⁻⁷ M). Interestingly the addition of an electronegative moiety to the phenyl group of L2 enhanced its anti-proliferative activity. Though IC₅₀ values are not significantly low with L3, the studies on series of synthetic 1,2,3-triazole ligands are useful for improving and building potential pro-apoptotic ligands.
Synchronously pumped dye laser passively mode-locked with ah antiresonant ring (1984)

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 Herman Vanherzeele, Russel Torti, and Jean-Claude Dials, "Synchronously pumped dye laser passively mode-locked with ah antiresonant ring," Appl. Opt. 23, 4182-4184 (1984) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Electronic wavelength tuning with semiconductor integrated etalon interference lasers (1983)

A novel method for broadband quasicontinuous wavelength tuning in GaAs-GaAlAs semiconductor lasers is reported. The wavelenth tuning experiment is performed with an interferometric laser consisting of a resonator with curved and straight segments. By separately pumping different segments of the laser the output wavelength can be tuned over a wide range. The outstanding features of the device are (1) very stable single longitudinal mode and stable transverse mode operation, and (2) a wavelength tuning range of as much as 90 Å.
Low Emission Variable Area Combustor for Vehicular Gas Turbines (1973)

In recent years automotive engine emissions have become subject to stringent Federal legislation. The most severe of these regulations pertains to the 1976 Emission Standards as defined by the Advanced Automotive Power Systems (AAPS) Division of the Environmental Protection Agency (EPA). A unique combustor concept has been developed by Solar which has demonstrated the feasibility of meeting these emission requirements. The integrated emissions of a typical regenerative gas turbine engine employing this combustor type were each below one half of the levels specified by the Federal 1976 Standards, when tested over a simulated federal driving cycle. The success of the feasibility tests for this combustor concept has lead to more fundamental studies and the planned development of a prototype combustor for demonstration on the EPA-AAPS baseline gas turbine engine. The prototype combustor for the baseline engine is described together with its variable area port mechanisms, which has been demonstrated as necessary for emission control.
Pharmacodynamics of antibiotics with respect to bacterial killing of and release of lipoteichoic acid by Streptococcus pneumoniae (2005)

In the evaluation of antibacterial drugs, the present model provides useful information on the whole process of bacterial killing and release of immunoreactive components from the bacterial cell wall.