gebhart/patrepeval huggingface dataset:
On-chip tunable long-period grating devices based on liquid crystal photonic bandgap fibers (2009)

We design and fabricate an on-chip tunable long-period grating device by integrating a liquid crystal photonic bandgap fiber on silicon structures. The transmission axis of the device can be electrically rotated in steps of 45 degrees as well as switched on and off with the response time in the millisecond range. The strength of the loss peak is controlled electrically, and the spectral position of the loss peak is thermally tunable. This compact design results in a stable grating and permits this device to be more easily applied in practical systems.
Glycoside hydrolase DisH from Desulfovibrio vulgaris degrades the N‐ acetylgalactosamine component of diverse biofilms (2018)

Biofilms of sulfate-reducing bacteria (SRB) produce H<sub>2</sub> S, which contributes to corrosion. Although bacterial cells in biofilms are cemented together, they often dissolve their own biofilm to allow the cells to disperse. Using Desulfovibrio vulgaris as a model SRB, we sought polysaccharide-degrading enzymes that disperse its biofilm. Using a whole-genome approach, we identified eight enzymes as putative extracellular glycoside hydrolases including DisH (DVU2239, dispersal hexosaminidase), an enzyme that we demonstrated here, by utilizing various p-nitrooligosaccharide substrates, to be an N-acetyl-β-D-hexosaminidase. For N-acetyl-β-D-galactosamine (GalNAc), V<sub>max</sub> was 3.6 µmol of p-nitrophenyl/min (mg protein)<sup>-1</sup> and K<sub>m</sub> was 0.8 mM; the specific activity for N-acetyl β-D-glucosamine (GlcNAc) was 7.8 µmol of p-nitrophenyl/min (mg protein)<sup>-1</sup> . Since GalNAc is one of the three exopolysaccharide matrix components of D. vulgaris, purified DisH was found to disperse 63 ± 2% biofilm as well as inhibit biofilm formation up to 47 ± 4%. The temperature and pH optima are 60°C and pH 6, respectively; DisH is also inhibited by copper and is secreted. In addition, since polymers of GalNAc and GlcNAc are found in the matrix of diverse bacteria, DisH dispersed biofilms of Pseudomonas aeruginosa, Escherichia coli and Bacillus subtilis. Therefore, DisH has the potential to inhibit and disperse a wide-range of biofilms.
Robust weighted-sum-rate based multi-stream transmission for the MIMO interference channel (2015)

We study the problem of multi-stream joint maximum sum-rate precoder and minimum mean-squared error equalizer design for interference alignment in the multi-input multi-output interference channel. Joint precoder and equalizer optimization requires alternation between the forward and reverse links and assumes perfect synchronization at each network node between the transmitters and receivers, resulting in extensive overhead and spectral efficiency loss. To overcome this serious drawback, we propose a new design approach based on weighted-sum-rate maximization assuming a virtual equalizer type at the transmitter to limit the optimization process to the transmitter side. Furthermore, we examine the achievable weighted-sum-rate when the virtual equalizer type is either matched or mismatched to the actual equalizer type used at the receivers. In addition, we quantify the performance loss due to mismatched equalizer types and demonstrate the robustness of our proposed sum-rate weighting strategy to such mismatches. Finally, we derive asymptotic performance expressions and verify their accuracy numerically, even for a moderate number of users.
Estimating separate steam thickness and temperature maps from 4D seismic data: An example from San Joaquin Valley, California (1999)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1999Estimating separate steam thickness and temperature maps from 4D seismic data: An example from San Joaquin Valley, CaliforniaAuthors: Christine EckerDavid LumleyAli TuraWilliam KempnerLouis KlonskyChristine EckerChevron Petroleum Technology Co., David LumleyChevron Petroleum Technology Co., Ali TuraChevron Petroleum Technology Co., William KempnerChevron North America Exploration and Production, and Louis KlonskyChevron North America Exploration and Productionhttps://doi.org/10.1190/1.1820969 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InReddit Permalink: https://doi.org/10.1190/1.1820969FiguresReferencesRelatedDetailsCited byTime-Lapse Monitoring of CO2 Response at Ankleshwar Oil Field: A Seismic Modeling Approach for Feasible CO2-EOR and Storage2 April 2017Steam effect on a merged 3D seismic datasetSailendra N. Mahapatra and Matthias G. Imhof15 December 2008Time‐lapse seismic reservoir monitoringDavid E. Lumley7 February 2012 | GEOPHYSICS, Vol. 66, No. 111. Reservoir Geophysics21 March 2012 SEG Technical Program Expanded Abstracts 1999ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1999 Pages: 2061 publication data© 1999 Copyright © 1999 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 04 Jan 2005 CITATION INFORMATION Christine Ecker, David Lumley, Ali Tura, William Kempner, and Louis Klonsky, (1999), "Estimating separate steam thickness and temperature maps from 4D seismic data: An example from San Joaquin Valley, California," SEG Technical Program Expanded Abstracts : 2032-2034. https://doi.org/10.1190/1.1820969 Plain-Language Summary PDF DownloadLoading ...
A glyco-immune checkpoint: Modulation of the immune micro-environment and induction of stem cell-like properties in breast cancer cells. (2018)

e15104 Background: Many tumors, including breast cancers, contain infiltrating immune cells that are unable to eliminate the tumor and in many cases, promote tumor progression by adding to the permissive local environment. Tumors have developed a plethora of mechanisms to evade the immune response, including inducing the expression of checkpoint ligands. Siglecs constitute a family of sialic acid binding lectins expressed on immune cells where they are involved in negatively regulating the immune response and like PD-1 contain an ITIM motif in their cytoplasmic tail. Cancers increase their surface sialylation and engage these inhibitory siglecs, mimicking some pathogens, to elicit immune evasion. As a result, siglecs and their interacting glycoproteins on tumor cells have recently been described as important glyco-immune checkpoints. Methods: Primary monocytes from healthy volunteers and macrophages differentiated from these cells were treated with recombinant MUC1 carrying the tumor-associated, sialylated glycan ST. Cells were phenotyped by flow cytometry and the conditioned medium collected and assayed, and placed onto the cancer cells. Results: When MUC1-ST bound to Siglec-9 on monocytes or macrophages a number of factors are secreted that are involved in tumor progression and immune recruitment. Moreover when MUC1-ST bound to Siglec-9 expressed by macrophages or dendritic cells, these ‘educated’ cells displayed reduced CD8 stimulatory capacity. When macrophages were treated with MUC1-ST they developed a tumor-associated macrophage-like phenotype with increased expression of PD-L1, IDO, CD206 and CD163. In addition preliminary data suggests that the factors released by monocytes induce a stem cell-like phenotype in the cancer cells, inducing the formation of mammospheres. Conclusions: This specific glyco-immune checkpoint not only induces immune suppression but also potentially induces tumor growth by the induction of a cancer stem cell like phenotype. Thus Siglec-9 glyco-immune checkpoint is a prime target for the development of novel immunotherapies.
Single-photon frequency shifting using coupled microring resonators on thin-film lithium niobate (2022)

We frequency shift single photons by 18.2 GHz using coupled thin-film lithium niobate microring resonators controlled by a single-tone microwave signal, and characterize the indistinguishability of the shifted and unshifted photons using Hong-Ou-Mandel interference. A visibility of 74 ± 0 . 9% is achieved.
Proliferation, migration, neuronal differentiation, and long-term survival of new cells in the adult zebrafish brain (2005)

In contrast to mammals, fish exhibit an enormous potential to produce new cells in the adult brain. By labeling mitotically dividing cells with 5-bromo-2'-deoxyuridine (BrdU), we have characterized the development of these cells in the zebrafish (Danio rerio). Proliferation zones were located in specific regions of the olfactory bulb, dorsal telencephalon (including a region presumably homologous to the mammalian hippocampus), preoptic area, dorsal zone of the periventricular hypothalamus, optic tectum, torus longitudinalis, vagal lobe, parenchyma near the rhombencephalic ventricle, and in a region of the medulla oblongata lateral to the vagal motor nucleus, as well as in all three subdivisions of the cerebellum, the valvula cerebelli, the corpus cerebelli, and the lobus caudalis cerebelli. In the valvula cerebelli and the corpus cerebelli, the young cells migrated from their site of origin in the molecular layers to the corresponding granule cell layers. By contrast, in the lobus caudalis cerebelli and optic tectum, no indication of a migration of the newly generated cells over wider distances could be obtained. BrdU-labeled cells remained present in the brain over at least 292 days post-BrdU administration, indicating a long-term survival of a significant portion of the newly generated cells. The combination of BrdU immunohistochemistry with immunolabeling against the neural marker protein Hu, or with retrograde tracing, suggested a neuronal differentiation in a large portion of the young cells.
Simulation of a down-scaled HEMP-Thruster (2014)

Upcoming formation flying space missions like NGO or next Next Generation&#13;\nGravity Missions require highly precise attitude control. This leads to never&#13;\nbefore seen demands in low thrust (0.1µN...150µN) and noise (� 0.1µN/&#13;\np&#13;\nHz) of the&#13;\nthruster actors in the control loop. One effort to reach those requirements is downscaling&#13;\nthe High Efficiency Multistage Plasma Thruster (HEMPT) design. The aim&#13;\nof the computer modeling part is to get an improved understanding of the thrusters&#13;\nbehavior especially in its downscaled configuration. This will help reaching the design&#13;\ngoals. First results of a computer model of a downscaled HEMPT will be presented&#13;\nhere.
From the Direct Observation of a PAA‐Based Binder Using STEM‐VEELS to the Ageing Mechanism of Silicon/Graphite Anode with High Areal Capacity Cycled in an FEC‐Rich and EC‐Free Electrolyte (Adv. Energy Mater. 12/2022) (2022)

Polyacrylic Binders In article number 2103348, Bernard Lestriez and co-workers use the combination of STEM-VEELS with the use of a specific electrolyte solvent composition to visualize, for the first time, the binder (polyacrilic acid, in blue) in silicon-based electrodes, even after up to 100 cycles. Such an observation is possible thanks to the fact that the only solid degradation product of this electrolyte is LiF (in green), as confirmed by NMR.
Nutrition of Microorganisms (1955)

Human coronavirus (HCoV) infection causes respiratory diseases with mild to severe outcomes. In the last 15 years, we have witnessed the emergence of two zoonotic, highly pathogenic HCoVs: severe acute respiratory syndrome coronavirus (SARS-CoV) and ...Read More
Soft switching boost converter for DC input LED drivers (2016)

LED lighting has attained maximum acceptance in the recent past for indoor, outdoor and special purpose applications. In most of the battery driven / PV based applications, efficient constant current driving of LED arrays is essential. Therefore, adopting soft switching for the power switch is important to achieve greater efficiency at higher frequencies, simultaneously realizing better power densities. In this paper, a technique is proposed which results in the complete soft switching of the power switch without any auxiliary switch and /or elaborate control mechanisms. Only an additional transformer is introduced to recycle the switching power to the output load. The concept is validated by building a 100W LED driver with 24 VDC input and 135 VDC output operating at 110 KHz. About 6 percent improvement in the efficiency was achieved with this technique.
YBa/sub 2/Cu/sub 3/O/sub 7/ thin film Josephson junctions (1993)

YBa/sub 2/Cu/sub 3/O/sub 7/ thin film step edge junctions have been studied using a magnetic field applied perpendicular to the substrate. The authors outline a theory to describe the magnetic field dependence of the critical current in the step edge junction geometry, and show that it is in broad agreement with the results of experiments.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Active Broad X-Band Circular Patch Antenna (2006)

This letter presents the results of experimental study of omnidirectional circular patch antenna operating in the TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">010</sub> mode. Antenna geometrical parameters have been selected on the basis of theoretical calculations. It has been shown that the antenna of this kind with VSWR les 2 and bandwidth of 18% has a conical radiation pattern with maximum oriented 36deg to the zenith. The antenna has a side radiation level of -15 dB and a cross-component level of less than -25 dB. The experimental results are in good agreement with the theoretical calculations. Employment of the one-stage HEMT amplifier makes it possible to obtain the total gain of an active antenna of no less than 10 dB. This antenna can be successfully used for mobile systems, wireless indoor communications, as well as for array applications
Beam Combining for Three High-Power Laser-Diode Stacks with a Stripe Mirror Technique (2004)

We describe a beam-combining technique for three high-power laser-diode stacks to effectively increase the power density. Employing this beam-combining technique using two slit-stripe mirrors, the power density increased to 722 W/cm 2 from a raw power density of 291 W/cm 2 by combining the beams of three high-power laser-diode stacks. We also achieved a focused power density of 250 kW/cm 2 by focusing the combined beam of the three high-power laser-diode stacks with a lens of 40-mm focal length.
Volatility Characterization for RRAM Devices (2016)

Emerging technologies, such as resistive random access memory (RRAM), are being actively researched for its potential applications in developing new technologies inspired by brainlike neuromorphic computing. However, developing automated characterization algorithms for the metastable resistive state (RS) transitions, i.e., volatility in the myriad RRAM configurations fabricated for achieving desired performance remains a major bottleneck. Here, we propose a novel algorithm for extracting the volatility parameters for the utilized metal-oxide TiOx-based devices. The module applies an appropriate stimulus and then estimates the RS changes of the device under test (DUT) using the standard two mean t-test method over a fixed interval of time. The module halts when an equilibrium state has been detected and is followed by a retention condition that checks the DUT for the achieved equilibrium state. The output of the proposed module determines the time the t-test lasted for and the voltage range under which the DUT can be safely operated in purely volatile region. In conclusion, the proposed characterization protocol ensures a methodical process development for automated characterization of RRAM arrays for operating them in the volatile region.
Effects of Ga substitution in Ce:Tb3GaxAl5−xO12single crystals for scintillator applications (2017)

Bulk single crystals of Ce-doped Tb3GaxAl5−xO12 (x = 0–4) were successfully synthesized by the floating zone method. The samples exhibit photoluminescence and scintillation with an intense broad emission due to the 5d–4f transitions of Ce3+ peaking around 550 nm as well as a few sharp peaks due to the 4f–4f transitions of Tb3+. Pulse height spectrum measurements under 137Cs γ-ray irradiation demonstrated a clear photoabsorption peak, in which the scintillation light yields were estimated to be 57,000 (x = 0), 28,000 (x = 1), 19,000 (x = 2), and 10,000 (x = 3) photons/MeV. Afterglow level can be suppressed with an appropriate addition of Ga, in which the optimum concertation is x = 2 leading an afterglow level of 23 ppm.
Aging Phenomena in the Removal of Nano-Particles from Si Wafers (2007)

This DOI is not currently attached to any metadata records. DOIs can’t actually ever be deleted (they’re persistent), but sometimes our members create DOIs in error. We do have a process to approximate deletion which we follow only in rare cases where the DOI has been genuinely created in error, and most crucially, if the DOI has never been published anywhere online or in print and never otherwise distributed to or communicated with anyone (authors, readers, reviewers, etc.
Flux creep and pinning potential distribution in zone-melted YBa2Cu3Ox (1991)

Magnetic relaxation data have been taken on zone-melted and sintered YBa2Cu3Ox samples over wide temperature and magnetic field ranges. We have found that magnetic relaxation varies greatly in the samples with different microstructures and crystallographic orientations. Flux-creep rates have been found to be reduced in the zone-melted samples owing to large amounts of intragranular crystal defects such as edge dislocations and stacking faults. An important flux-pinning behavior related to the pinning potential distributions has been observed in the samples. The relationship between microstructural orientation and pinning potential distributions in YBa2Cu3Ox is discussed.
Nano- and Micro- Carnauba Wax Emulsions versus Shellac Protective Coatings on Postharvest Citrus Quality (2020)

Coatings are generally applied to fruit as microemulsions, but nanoemulsions are still experimental. ‘Nova’ mandarins ( Citrus reticulata ) were coated with shellac or carnauba ( Copernica cerifera ) microemulsions or an experimental carnauba nanoemulsion; these were compared with an uncoated control during storage for 7 days at 20 °C. Coatings were also tested on ‘Unique’ tangors ( C. reticulata × C. sinensis ) stored for 14 days at 10 °C followed by a simulated marketing period of 7 days at 20 °C. Fruit quality evaluations included weight loss, gloss, soluble solids (SS), titratable acidity (TA), pH, SS/TA ratio, internal CO 2, O 2 , fruit juice ethanol, and other aroma volatile content. Sensory visual shine and tangerine ( C. reticulata ) flavor rank tests after storage were conducted, followed by an off-flavor rating. The carnauba waxes resulted in less weight loss compared with the uncoated control and shellac coating during both experiments. There were no differences in gloss measurements of ‘Nova’ mandarins; however, shellac-coated fruit ranked highest for shine in a sensory test. For ‘Unique’ tangors, initially, shellac showed the highest gloss (shine) measurement; however, at the end of storage, the nanoemulsion exhibited the highest gloss, although it was not different from that of the microemulsion. Similarly, after storage, the nanoemulsion ranked highest for visual shine, although it was not different from that of the microemulsion. There were only minor differences in SS, TA, pH, and SS/TA among treatments. The internal CO 2 gas concentration and juice ethanol content generally increased and internal O 2 decreased during storage. The highest levels of CO 2 and ethanol were found for the shellac treatment, as was the lowest O 2, indicating anaerobic respiration. There were only minor differences among the other coating treatments; however, they were only sometimes different from those of the control, which generally had the highest O 2 , lowest CO 2 , and lowest ethanol. Shellac and the carnauba microemulsion also altered the volatile profile more than the control and the nanoemulsion did, especially for ‘Unique’ tangors. For ‘Unique’ tangors, the control and nanoemulsion ranked highest for tangerine flavor and had the least off-flavor at the end of storage. Among the coatings tested, the carnauba emulsions demonstrated less water loss, imparted more sustainable gloss, and caused less ethanol production than shellac, with the nanoemulsion exhibiting higher gloss measurements, less modifications of the atmosphere and volatile profile, and, consequently, better flavor compared with the microemulsion.
Fast Calibration of a Robust Model Predictive Controller for Diesel Engine Airpath (2018)

A significant challenge in the development of control systems for diesel airpath applications is to tune the controller parameters to achieve satisfactory output performance, especially whilst adhering to input and safety constraints in the presence of unknown system disturbances. Model-based control techniques, such as model predictive control (MPC), have been successfully applied to multivariable and highly nonlinear systems, such as diesel engines, while considering operational constraints. However, efficient calibration of typical implementations of MPC is hindered by the high number of tuning parameters and their non-intuitive correlation with the output response. In this paper, the number of effective tuning parameters is reduced through suitable structural modifications to the controller formulation and an appropriate redesign of the MPC cost function to aid rapid calibration. Furthermore, a constraint tightening-like approach is augmented to the control architecture to provide robustness guarantees in the face of uncertainties. A switched linear time-varying MPC strategy with recursive feasibility guarantees during controller switching is proposed to handle transient operation of the engine. The robust controller is first implemented on a high fidelity simulation environment, with a comprehensive investigation of its calibration to achieve desired transient response under step changes in the fuelling rate. An experimental study then validates and highlights the performance of the proposed controller architecture for selected tunings of the calibration parameters for fuelling steps and over drive cycles.
Measuring The Similarity Of Rhythmic Patterns. (2002)

[TODO] Add abstract here.
Orange Phosphorescent Organic Light-emitting Diodes Using a Spirobenzofluorene-type Phospine Oxides as Host Materials (2010)

Spiro-type orange phosphorescent host materials, 9-diphenylphosphine oxide-spiro[fluorene-7,9'-benzofluorene] (OPH-1P) and 5-diphenylphosphine oxide-spiro[fluorene-7,9'-benzofluorene] (OPH-2P) were successfully prepared by a lithiation reaction followed by a phosphination reaction with diphenylphosphinic chloride. The EL characteristics of OPH-1P and OPH-2P as orange host materials doped with iridium(III) bis(2-phenylquinoline)acetylacetonate (<TEX>$Ir(pq)_2acac$</TEX>) were evaluated. The electroluminescence spectra of the ITO (150 nm)/DNTPD (60 nm)/NPB (30 nm)/OPH-1P or OPH-2P: <TEX>$Ir(pq)_2acac$</TEX> (30 nm)/BCP (5 nm)/<TEX>$Alq_3$</TEX> (20 nm)/LiF (1 nm)/Al (200 nm) devices show a narrow emission band with a full width at half maximum of 75 nm and <TEX>$\lambda_{max}$</TEX> = 596 nm. The device obtained from OPH-1P doped with 3% <TEX>$Ir(pq)_2acac$</TEX> showed an orange color purity of (0.580, 0.385) and an efficiency of (14 cd/A at 7.0 V). The ability of the OPH-P series to combine a high triple energy with a low operating voltage is attributed to the inductive effect of the P=O moieties and subsequent energy lowering of the LUMO, resulting in the enhancement of both the electron injection and transport in the device. The overall result is a device with an EQE > 8% at high brightness, but operating voltage of less than 6.4 V, as compared to the literature voltages of ~10 V.