gebhart/patrepeval huggingface dataset:
Non-intrusive measurement of hot gas temperature in a gas turbine engine (2023)

A method and apparatus for operating a gas turbine engine including determining a temperature of a working gas at a predetermined axial location within the engine. An acoustic signal is encoded with a distinct signature defined by a set of predetermined frequencies transmitted as a non-broadband signal. Acoustic signals are transmitted from an acoustic transmitter located at a predetermined axial location along the flow path of the gas turbine engine. A received signal is compared to one or more transmitted signals to identify a similarity of the received signal to a transmitted signal to identify a transmission time for the received signal. A time-of-flight is determined for the signal and the time-of-flight for the signal is processed to determine a temperature in a region of the predetermined axial location.
Terminal stages of erythroid differentiation: persistent production of globin messenger RNA is necessary to sustain globin synthesis (1978)

The kinetic relationship between the globin mRNA accumulation and the rate of synthesis of globin chains was studied during the terminal stages of differentiation in erythroid cells derived from the yolk sac of mouse fetuses. RNA derived from the whole cells and from different cell compartments were hybridized to DNA complementary to embryonic globin mRNA. The relative proportion of embryonic globin RNA molecules and their absolute number per cell were estimated on the 11th, 12th, and 13th days of mouse fetal development. During erythroid terminal differentiation globin mRNA became progressively predominant on polyribosomes along with the progressive specialization of cell functions. The number of embryonic globin RNA molecules per cell remained constant while yolk sac erythroid cells underwent two rounds of cell division. These data indicate that the transcription of globin genes is operative throughout the last stages of terminal differentiation and that there is no detectable storage of globin RNA sequences in these cells. The rates of accumulation of mRNA molecules and of globin synthesis both seem correlated to the length of the cell cycle.
Modeling an alkaline supercapacitor electrode from activated carbon particles (2007)

This doctoral thesis gives background to the field of electrochemical energy storage in supercapacitors. It attempts to place the supercapacitor device in context of available and future technologies for alternative energy systems for transportation. Limitations of cells and electrodes and key challenges in the supercapacitor development are introduced. One objective of the thesis is to investigate and describe ionic transport in active carbon and possible restrictions in nanostructured porous systems with focus on small (micro and meso) pores. Another is to develop a model suitable for investigations of concentration and potential profiles from a single particle perspective. The results from the studies are presented in this thesis together with the scientific papers this thesis is based on. Studying electrochemical gradients (concentration and potential) of large electrodes and single particles may give important information of the limitations of the material. In larger three-electrode experimental set-ups, these gradients can be studied for electrodes but single particles are not available for experimental studies to the same extent since the matrix of an electrode consist of many particles, all adding to the total gradient of the electrode. The experimental part of this thesis is based on different experimental techniques: Three-electrode experiments for larger electrodes, microelectrode experiments for single particles, numerical simulations using Multiphysics (software) of large electrodes consisting of single particles. Four Papers are appended to the thesis. They present results and discussions regarding ionic transport, surface functionalities and modeling of a particle based supercapacitor electrode. Estimated effective diffusivities for an active carbon containing micro, meso and macropores are presented. Surface functionalities in the form of oxygen-containing groups were present in a carbon studied using two experimental set-ups. Faradaic peaks, previously not reported in activated carbon were seen. The occurrence of Faradaic phenomena in one experimental set-up but not the other is further analyzed and the origin of these peaks discussed. The particle based mathematical model, where galvanostatic and cyclic voltammetry is simulated, is presented. Concentration profiles both in the particles and electrodes are discussed and some of the numerical results are compared with experimental data.
Cooperative adaptive cruise control over unreliable networks: An observer-based approach to increase robustness to packet loss: (2018)

Cooperative Adaptive Cruise Control (CACC) is nowadays a promising technique to increase highway through-put, safety and comfort for vehicles. Enabled by wireless communication, CACC allows a platoon of vehicles to achieve better performance than Adaptive Cruise Control; however, since wireless is employed, problems related to unreliability arise. In this paper, we design a digital controller to achieve platoon stability, enhanced by an observer to increase robustness against packet losses. A preliminary set of simulation results is presented, which confirms the interest of using an observer in combination with a local and cooperative digital controller. ÃÂ© 2018 European Control Association (EUCA).
Compression de donnees sismiques : bancs de filtres et transformees etendues, synthese et adaptation (2000)

Les algorithmes les plus souvent employes pour la compression de donnees sismiques utilisent des transformees en ondelettes ou en paquets d'ondelettes. Les coefficients issus de la transformation sont generalement quantifies puis codes par les techniques classiques de codage entropique. Nous proposons ici un premier algorithme de compression base sur la transformee en ondelettes. Cette transformation est assortie d'une technique de codage de type zerotree coding, d'emploi original en sismique. Cependant, l'emploi des transformees en ondelettes classiques reste une approche relativement rigide. Or, il est souvent souhaitable de pouvoir adapter les transformees aux proprietes de chaque type de signaux. Nous proposons donc un deuxieme algorithme employant, a la place des ondelettes, un ensemble de transformees dites transformees etendues. Ces transformees, issues de la theorie des bancs de filtres, sont parametrees. Les lot (lapped orthogonal transforms) de h. Malvar ou les genlot (generalized lapped orthogonal transforms) de de queiroz et al. En sont des exemples connus. Nous proposons plusieurs criteres d'optimisation de ces parametres, permettant de construire des transformees etendues adaptees aux proprietes des signaux sismiques. Nous montrons que ces transformees peuvent etre utilisees avec codage des coefficients analogue a un codage arborescent employe pour les ondelettes. Les deux algorithmes de compression proposes possedent pour avantages la possibilite de choisir precisement le taux de compression des donnees, de comprimer les donnees par blocs (dans le cas des transformees etendues) et de pouvoir decomprimer partiellement les donnees, pour le controle-qualite ou la visualisation. Les performances des deux algorithmes proposees sont testees sur un ensemble de donnees sismiques reelles. Ces performances sont evaluees pour differentes mesures de qualite. Nous comparons egalement leurs performances a d'autres algorithmes de compression.
Advances in photonics design and modeling for nano- and bio-photonics applications (2010)

In this invited paper we focus on the discussion of two recent unique applications of the Finite-Difference Time-Domain (FDTD) simulation method to the design and modeling of advanced nano- and bio-photonic problems. We will first discuss the application of a traditional formulation of the FDTD approach to the modeling of sub-wavelength photonics structures. Next, a modified total/scattered field FDTD approach will be applied to the modeling of biophotonics applications including Optical Phase Contrast Microscope (OPCM) imaging of cells containing gold nanoparticles (NPs) as well as its potential application as a modality for in vivo flow cytometry configurations. The discussion of the results shows that the specifics of optical wave phenomena at the nano-scale opens the opportunity for the FDTD approach to address new application areas with a significant research potential.
THE STRUCTURE OF gauche-BUTADIENE: INSIGHTS FROM THE CENTIMETER, MILLIMETER, AND FIR-INFRARED HIGH RESOLUTION SPECTRA (2018)

\\noindent\n\n\\begin{minipage}{0.67\\textwidth}\n\nRecent investigation of the centimeter spectrum of \\textit{gauche}-butadiene has unambiguously established a non-planar conformation for this fundamental, archetypal diene for the Diels-Alder reaction [1]. We will present subsequent theoretical and experimental investigations aimed at determining a highly accurate molecular structure and the barrier height for interconversion between the two equivalent tunneling \\textit{gauche} forms.\n\n\n\n\n\n\\medskip \\noindent\n\n[1] J. H. Baraban, M.-A. Martin-Drumel, \\textit{et al.}, \\textit{Angewandte Chemie}, \\textbf{57}, 1821 (2018)\n\n\\end{minipage}\n\n\\begin{minipage}{0.3\\textwidth}\n\n\\includegraphics[width=\\textwidth]{butadiene_pict.eps}\n\n\\end{minipage}
A Phosphatidylinositol Lipids System, Lamellipodin, and Ena/VASP Regulate Dynamic Morphology of Multipolar Migrating Cells in the Developing Cerebral Cortex (2012)

In the developing mammalian cerebral cortex, excitatory neurons are generated in the ventricular zone (VZ) and subventricular zone; these neurons migrate toward the pial surface. The neurons generated in the VZ assume a multipolar morphology and remain in a narrow region called the multipolar cell accumulation zone (MAZ) for ∼24 h, in which they extend and retract multiple processes dynamically. They eventually extend an axon tangentially and begin radial migration using a migratory mode called locomotion. Despite the potential biological importance of the process movement of multipolar cells, the molecular mechanisms remain to be elucidated. Here, we observed that the processes of mouse multipolar cells were actin rich and morphologically resembled the filopodia and lamellipodia in growth cones; thus, we focused on the actin-remodeling proteins Lamellipodin (Lpd) and Ena/vasodilator-stimulated phosphoprotein (VASP). Lpd binds to phosphatidylinositol (3,4)-bisphosphate [PI(3,4)P₂] and recruits Ena/VASP, which promotes the assembly of actin filaments, to the plasma membranes. In situ hybridization and immunohistochemistry revealed that Lpd is expressed in multipolar cells in the MAZ. The functional silencing of either Lpd or Ena/VASP decreased the number of primary processes. Immunostaining and a Förster resonance energy transfer analysis revealed the subcellular localization of PI(3,4)P₂ at the tips of the processes. A knockdown experiment and treatment with an inhibitor for Src homology 2-containing inositol phosphatase-2, a 5-phosphatase that produces PI(3,4)P₂ from phosphatidylinositol (3,4,5)-triphosphate, decreased the number of primary processes. Our observations suggest that PI(3,4)P₂, Lpd, and Ena/VASP are involved in the process movement of multipolar migrating cells.
Auxiliary Power Supply System for Electric Power Steering (EPS) and High-Heat-Resistant Lithium-Ion Capacitor (2019)

Advanced Driver Assistance System (ADAS) and Automated Driving (AD) are the two major topics for the current and next generations of vehicles. To realize them in full-size vehicles equipped with a 12 V power supply, the need for electric power steering (EPS) is increasing. Currently, the steering system of full-size vehicles is equipped with hydraulic power steering due to electric power shortage. An auxiliary power supply system using a lithium-ion capacitor was developed in order to solve the concern. In addition, to mount the system in the vehicle with no cooling–heating equipment, development of expanding the operating temperature range of the lithium-ion capacitor was conducted. Several improvements have made the capacitor operate stably in high-temperature environments above 100 °C.
Effects of Ethanol on Rat Hypothalamic Luteinizing Hormone Releasing Hormone. A Study Utilizing Radioimmunoassay1 (1983)

To further understand the mechanism of action by which ethanol (ETOH) decreases plasma luteinizing hormone (LH) levels, the effects of multiple i.p. injections of EOH (1.0--1.5 g/kg) or saline on hypothalamic luteinizing hormone releasing hormone (LHRH) and plasma LH concentrations were evaluated in intact and castrate male rats. After injections, animals were decapitated, brains rapidly removed, and blocks containing the hypothalamus [with median eminence (ME)] were isolated. Hypothalami were subjected to acetic acid extraction and LHRH content quantitated via radioimmunoassay (RIA). Hypothalamic LHRH was found to be inversely correlated with plasma LH. In response to castration, both saline and ETOH-treated rats showed a decrease in hypothalamic LHRH content with a concomitant increase in plasma LH; however, the ETOH-treated animals retained significantly greater concentrations of LHRH and showed significantly lower plasma LH levels when compared to saline-treated controls. Likewise, ETOH-treated intact animals showed significant increases in LHRH content, with LH levels remaining significantly lower than the saline-treated intact controls. Thus, these data from both intact and castrate rats provide evidence to support the hypothesis that alcohol-induced decreases in LH levels are due to a diminished release rate of hypothalamic LHRH.
A framework for modeling and simulating energy harvesting WSN nodes with efficient power management policies (2012)

Wireless sensor networks (WSNs) require an extremely energy-efficient design. As sensor nodes have limited power sources, the problem of autonomy is crucial. Energy harvesting provides a potential solution to this problem. However, as current energy harvesters produce only a small amount of energy and their storage capacity is limited, efficient power management techniques must also be considered. In this article we address the problem of modeling and simulating energy harvesting WSN nodes with efficient power management policies. We propose furthermore a framework that permits to describe and simulate an energy harvesting sensor node by using a high level modeling approach based on power consumption and energy harvesting. The node architectural parameters as well as the on-line power management techniques will also be specified. Two new power management architectures will be introduced, taking into account energy-neutral and negative-energy conditions. Simulations results show that the throughput of a sensor node can be improved up to 50% when compared to a state of the art power management algorithm for solar harvesting WSN. The simulation framework is then used to find an efficient system sizing for a solar energy harvesting WSN node.
Surrogate Modelling of the Steady Aeroelastic Performance of the Fish Bone Active Camber Concept (2019)

Previous work on the Fish Bone Active Camber morphing airfoil concept has shown promising performance in terms of a large lift control authority and low drag penalty. This work extends significantly the range of operating parameters considered for this concept and creates a surrogate model of the aerodynamic performance of the FishBAC, as predicted by a loosely coupled, partitioned Fluid Structure Interaction analysis. This surrogate model provides a computationally lightweight method of including the steady aeroelastic behavior and resulting aerodynamic performance of the FishBAC within analysis of fixed or rotating wing applications, and it is made freely available for download. The underlying low-fidelity Fluid Structure Interaction analysis, which builds upon previous work, is first introduced and an improved non-linear formulation of the morphing deflection is presented. The design case studied is then introduced, along with discussion of relevant operating conditions. Design studies around key parameters are shown, motivating the final configuration selected. The steady aeroelastic response of this design configuration is then predicted over a wide range of Mach numbers, angles of attack and camber deflections. A MATLAB-based, interpolating surrogate model is then generated around this data set. This analysis shows that the FishBAC provides large lift and pitching moment authority combined with high lift-to-drag ratios over a very wide range of operating conditions, and provides a low computational cost means of including the concept into blade/wing or aircraft level analysis.
Evidence That a Metabolite of Equine Estrogens, 4-Hydroxyequilenin, Induces Cellular Transformation in Vitro (2000)

Estrogen replacement therapy has been correlated with an increased risk of developing hormone-dependent cancers. 4-Hydroxyequilenin (4-OHEN) is a catechol metabolite of equilenin and equilin which are components of the estrogen replacement formulation marketed under the name of Premarin (Wyeth-Ayerst). Previously, we showed that 4-OHEN autoxidizes to potent cytotoxic quinoids which can consume reducing equivalents and molecular oxygen, and cause a variety of DNA lesions, including formation of bulky stable adducts, apurinic sites, and oxidation of the phosphate-sugar backbone and purine/pyrimidine bases [Bolton, J. L., Pisha, E., Zhang, F., and Qiu, S. (1998) Chem. Res. Toxicol. 11, 1113-1127]. All of these deleterious effects could contribute to the cytotoxic/genotoxic effects of equine estrogens in vivo. In the study presented here, we studied the oxidative and carcinogenic potential of 4-OHEN and the catechol metabolite of the endogenous estrogen, 4-hydroxyestrone (4-OHE), in the JB6 clone 41 5a and C3H 10T(1/2) murine fibroblast cells. The relative ability of 4-OHEN and 4-OHE to induce oxidative stress was measured in these cells by oxidative cleavage of 2',7'-dichlorodiacylfluorosceindiacetate to dichlorofluoroscein. 4-OHEN (1 microM) displayed an increase in the level of reactive oxygen species comparable to that observed with 100 microM H(2)O(2). In contrast, 4-OHE demonstrated antioxidant capabilities in the 5-50 microM range. With both cell lines, we assessed single-strand DNA cleavage using the comet assay and the formation of oxidized DNA bases, such as 8-oxodeoxyguanosine, utilizing the Trevigen Fpg comet assay. 4-OHEN caused single-strand breaks and oxidized bases in a dose-dependent manner in both cell lines, whereas 4-OHE did not induce DNA damage. Since oxidative stress has been implicated in cellular transformation, we used the JB6 clone 41 5a anchorage independence assay to ascertain the relative ability of 4-OHEN and 4-OHE to act as tumor promoters. 4-OHEN caused a slight but significant increase in the extent of cellular transformation at the 100 nM dose; however, in the presence of NADH, which catalyzes redox cycling of 4-OHEN, the transformation ability of 4-OHEN was dramatically increased. 4-OHE did not induce transformation of the JB6 clone 41 5a in the 0.1-10 microM range. The initiation, promotion, and complete carcinogenic transformation potentials of both metabolites were measured in the C3H 10T(1/2) cells. 4-OHEN demonstrated activity in all stages of transformation at doses of 10 nM to 1 microM, whereas 4-OHE only demonstrated promotional capabilities at the 10 microM dose. These data suggest that oxidative stress could be partially responsible for the carcinogenic effects caused by 4-OHEN and that 4-OHEN is a more potent transforming agent than 4-OHE in vitro.
Natural Language Dialogue For Managing An On-Line Calendar (1978)

This paper describes a project for studying the feasibility of developing systems which accomplish typical office tasks by means of human-like communication with the user. An actual dialogue with the initial version of a system that is being built for scheduling activities such as meetings is presented and then is used as a source of examples in explaining the operation of the system. The knowledge network is described, and the use of Augmented Phrase Structure Grammars for both the analysis and generation of English utterances in this system is discussed.
Analog Front-End ASIC Requirements for a FDM Broadband Powerline System Enabling Co-Existence (2007)

This paper presents a feasible set of analog ASIC requirements optimized to achieve co-existence in a broadband power line communications (PLC) system based on frequency division multiplexing (FDM). FDM is the most straightforward way to achieve co-existence between different systems, however, this involves many design challenges at the circuit level. First, a short description will be given of the PLC system, which is under development in the EU funded IST POWERNET project. It will be shown that conventional receiver architectures, typically designed for time division multiple access (TDMA) schemes, are not well suited for FDM systems e.g. due to challenges arising from near/far situations. Solutions to improve the performance will be discussed and simulation results will be presented of the proposed architecture, based on parameters extracted from circuit designs, to show the feasibility of high bit rates in FDM transceivers.
Evolution of porosity in carbide-derived carbon aerogels (2014)

Strongly hierarchical carbide-derived carbon aerogels with high total porosity, rapid adsorption kinetics, and precisely controllable microstructure are reported.
Source Resistance Reduction of AlGaN–GaN HFETs with Novel Superlattice Cap Layer (2005)

We have developed a novel AlGaN-GaN heterojunction field effect transistor (HFET) with an ultralow source resistance by employing the novel superlattice (SL) cap structure. The particular advantage of the SL cap, i.e., the existence of multiple layers of the polarization-induced two-dimensional electron gas (2DEG) with high mobility and high concentration at each AlGaN-GaN interface, is fully exploited for lowering the lateral resistance and the potential barrier at the interface of the SL cap and the HFET barrier layer. By designing the AlGaN-GaN thickness ratio, we have established a method to obtain the optimized SL structure and have achieved an extremely low source resistance of 0.4 /spl Omega//spl middot/mm which is lower not only than HFETs with the conventional structure but also than those with the n-GaN cap structure. The SL cap HFET fabricated on a sapphire substrate exhibited excellent dc and RF performance, i.e., maximum transconductance of over 400 mS/mm, maximum drain current of 1.2 A/mm, a cutoff frequency of 60 GHz, a maximum frequency of oscillation of 140 GHz, and a very low noise figure minimum of 0.7 dB at 12 GHz.