gebhart/patrepeval huggingface dataset:
Modulated surface textures for enhanced light trapping in thin-film silicon solar cells (2010)

Substrates with a modulated surface texture were prepared by combining different interface morphologies. The spatial frequency surface representation method is used to evaluate the surface modulation. When combining morphologies with appropriate geometrical features, substrates exhibit an increased scattering level in a broad wavelength region. We demonstrate that the improved scattering properties result from a superposition of different light scattering mechanisms caused by the different geometrical features integrated in a modulated surface texture.
North Carolina Academy of Science (1923)

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Speech Augmentation Using Wavenet in Speech Recognition (2019)

Data augmentation is crucial to improving the performance of deep neural networks by helping the model avoid overfitting and improve its generalization. In automatic speech recognition, previous work proposed several approaches to augment data by performing speed perturbation or spectral transformation. Since data augmented in this manner has similar acoustic representations as the original data, it has limited advantage in improving generalization of the acoustic model. In order to avoid generating data with limited diversity, we propose a voice conversion approach using a generative model (WaveNet), which generates a new utterance by transforming an utterance to a given target voice. Our method synthesizes speech with diverse pitch patterns by minimizing the use of acoustic features. With the Wall Street Journal dataset, we verify that our method led to better generalization compared to other data augmentation techniques such as speed perturbation and WORLD-based voice conversion. In addition, when combined with the speed perturbation technique, the two methods complement each other to further improve performance of the acoustic model.
Statistical aspects of aquaculture research: sample sizes for pond experiments (1998)

The present paper illustrates the need for greater pond replication in pond experiments. It demonstrates that increasing the number of fish sampled in each pond will not reduce the number of ponds needed when treatment effects are estimated. Sampling bias, skew distributions and heterogeneous fish populations are discussed in relation to fish sample sizes. When it is impossible to increase the number of replicate ponds, several methods of accounting for the pond variability are suggested.
Analysis and comparison of cache coherence protocols for a packet-switched multiprocessor (1989)

Analytical models are developed for seven existing cache protocols, namely, Write-Once, Write-Through, Synapse, Berkeley, Illinois, Firefly, and Dragon. The protocols are implemented on a multiprocessor with a packet-switched shared bus. The models are based on queuing networks that consist of both open and closed classes of customers. The models incorporate the requests for invalidation signals, write-through, and write-back operations, and the solution is based on the mean value analysis (MVA) algorithm. The performance of these protocols under various system parameters is compared on the basis of the models. It is found that Firefly and Dragon perform better than the others.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The rate monotonic scheduling algorithm: exact characterization and average case behavior (2003)

An exact characterization of the ability of the rate monotonic scheduling algorithm to meet the deadlines of a periodic task set is represented. In addition, a stochastic analysis which gives the probability distribution of the breakdown utilization of randomly generated task sets is presented. It is shown that as the task set size increases, the task computation times become of little importance, and the breakdown utilization converges to a constant determined by the task periods. For uniformly distributed tasks, a breakdown utilization of 88% is a reasonable characterization. A case is shown in which the average-case breakdown utilization reaches the worst-case lower bound of C.L. Liu and J.W. Layland (1973).< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Joining of Ceramics and Metals (1988)

Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Structure-based prediction of modifications in glutarylamidase to allow single-step enzymatic production of 7-aminocephalosporanic acid from cephalosporin C (2002)

Glutarylamidase is an important enzyme employed in the commercial production of 7-aminocephalosporanic acid, a starting compound in the synthesis of cephalosporin antibiotics.7-aminocephalosporanic acid is obtained from cephalosporin C, a natural antibiotic, either chemically or by a two-step enzymatic process utilizing the enzymes D-amino acid oxidase and glutarylamidase.We have investigated possibilities for redesigning glutarylamidase for the production of 7-aminocephalosporanic acid from cephalosporin C in a single enzymatic step.These studies are based on the structures of glutarylamidase, which we have solved with bound phosphate and ethylene glycol to 2.5 Å resolution and with bound glycerol to 2.4 Å.The phosphate binds near the catalytic serine in a way that mimics the hemiacetal that develops during catalysis, while the glycerol occupies the side-chain binding pocket.Our structures show that the enzyme is not only structurally similar to penicillin G acylase but also employs essentially the same mechanism in which the ␣-amino group of the catalytic serine acts as a base.A subtle difference is the presence of two catalytic dyads, His B23/Glu B455 and His B23/Ser B1, that are not seen in penicillin G acylase.In contrast to classical serine proteases, the central histidine of these dyads interacts indirectly with the O␥ through a hydrogen bond relay network involving the ␣-amino group of the serine and a bound water molecule.A plausible model of the enzyme-substrate complex is proposed that leads to the prediction of mutants of glutarylamidase that should enable the enzyme to deacylate cephalosporin C into 7-aminocephalosporanic acid.
Management of toenail onychomycosis (1999)

The treatment of toenail onychomycosis is reviewed. Onychomycosis contributes to 40% of all nail disorders and appears to be increasing in frequency. Mycotic nail infections are usually caused by dermatophytes, yeasts, and nondermatophyte molds. Most cases of toenail onychomycosis are caused by dermatophytes. Mycotic nail infections do not always resolve spontaneously and may have a substantial impact on the patient's quality of life. Current treatment modalities for onychomycosis include surgery, topical antifungals, and oral antifungals. Surgery is generally not recommended as first-line therapy. Broad-spectrum topical and oral antifungal agents are the most frequently used treatments. Topical treatment is well tolerated but is usually not effective because of poor patient compliance and inadequate penetration of the nail. Oral antifungals are more successful but carry greater risks. Griseofulvin and ketoconazole have been oral antifungals traditionally used for onychomycosis, but these agents are associated with relatively low cure rates. Itraconazole and terbinafine are both safe and effective first-line agents, with reported overall cure rates of 50-90% for dermatophyte-related onychomycosis. Intermittent oral antifungal therapy may reduce the risk of systemic adverse effects and the cost of therapy; more study of this approach is needed. Oral antifungal agents offer patients with toenail onychomycosis greater likelihood of a cure than topical antifungals, but oral therapy carries greater risks and requires closer monitoring.
Erasing gains for concatenated codes (1995)

The optimal strategy for erasing symbols in a concatenated coding system, in which the outer code is decoded once, is considered. In general, the strategy involves comparison of a posteriori symbol likelihoods to nonuniform thresholds. The performance of a greedy version of such a rule is evaluated for a number of specific short inner codes, over both memoryless and bursty channels, with hard and soft decisions. It is shown that the gains achievable via erasing can be substantial when hard decision inner decoders are used and when short inner codes are used, but are less so otherwise. It is shown that erasing gains can be very large when applied over channels with memory, with interleaving at the symbol level.
A phase II evaluation of bexarotene (Targretin) capsules in patients with metastatic melanoma. (2000)

A phase II study was undertaken to determine the efficacy of Bexarotene in melanoma. Between November 1997 and April 1998, 19 patients were given Bexarotene in single daily oral doses of 450 mg/m2 in capsule form continuously. Nineteen patients, four with choroidal metastatic melanoma, were treated. No responses were seen. Five patients had stable disease, two of the four with choroidal melanoma, had tumor progression. Myelosuppression was mild. Grade 3 myalgia, asthenia, diarrhea, cold hands/feet, and mood changes were seen in one patient each. Changes in serum triglyceride and thyroxine levels were common. Bexarotene, as used in this study, is not effective against melanoma.
Distance-Dependent Head-Related Transfer Functions Measured With High Spatial Resolution Using a Spark Gap (2009)

A measurement of head-related transfer functions (HRTFs) with high spatial resolution was carried out in this study. HRTF measurement is difficult in the proximal region because of the lack of an appropriate acoustic point source. In this paper, a modified spark gap was used as the acoustic sound source. Our evaluation experiments showed that the spark gap was more like an acoustic point source than others previously used from the viewpoints of frequency response, directivity, power attenuation, and stability. Using this spark gap, high spatial resolution HRTFs were measured at 6344 spatial points, with distances from 20 to 160 cm, elevations from -40deg to 90deg, and azimuths from 0deg to 360deg. Based on these measurements, an HRTF database was obtained and its reliability was confirmed by both objective and subjective evaluations.
Location management for mobile devices (2008)

Location-awareness, in the form of location information about clients and location-based services provided by servers, is becoming increasingly important for networked communications in general, and wireless and mobile devices in particular. The current fragmented landscape of location concepts and location-awareness, however, is not suitable for handling location information on a Web scale. Providing users with mechanisms which allow them to control how they want to expose their location information, and thus allow control over how to share location information with others and services, is a crucial step for better location management for mobile devices. This paper presents a concept for representing location vocabularies, matching and mapping them, how these vocabularies can be used to support better privacy for users of location-based services, and better location sharing between users and services. The concept is based on a language for describing place name vocabularies, which we call ldquoplace markup language (PlaceML)rdquo, and on various ways how these vocabularies can be used in a location-aware infrastructure of networked devices.
Burst coherent detection with robust frequency and timing estimation for portable radio communications (2003)

The authors describe two approaches that make burst coherent demodulation robust against frequency offset between transmitter and receiver: using a second-order PLL (phase lock loop) to track frequency error, and performing transforms between phase and rectangular vector components to eliminate errors caused by wraparound discontinuities. It is found that with a small increase in circuit complexity (mostly additional read-only memory), the second method can estimate symbol timing and frequency offset very accurately, even for a phase bias close to 45 degrees per symbol the residual frequency error can easily be corrected by a second-order PLL. By using this implementation, a low-overhead TDMA (time division multiple access) burst can be coherently demodulated in a portable radio environment without requiring very stable frequency references.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Strung Absentia (2000)

Journal Article Strung Absentia Get access Carl Phillips Carl Phillips Search for other works by this author on: Oxford Academic Google Scholar Literary Imagination, Volume 2, Issue 2, Spring 2000, Pages 182–184, https://doi.org/10.1093/litimag/2.2.182 Published: 01 March 2000
Chemotherapy of Experimental Chagas' Disease with Thirty Antibiotics (1953)

SummaryThe following antibiotics were tested against Trypanosoma cruzi both in vitro and in vivo, 23 for the first time: 1. acti-dione; 2. antibiotic S; 3. aureomycin hydrochloride; 4. bacillin culture filtrate; 5. bacitracin—topical; 6. borrelidin sodium; 7. Bristol A6786-52; 8. chloramphenicol (chloromycetin); 9. circulin (antibiotic Q-19); 10. dihydrostreptomycin sulfate; 11. endomycin; 12. fradicin; 13. fumagillin; 14. gliotoxin; 15. gramicidin; 16. neomycin sulfate; 17. penicillin G sodium; 18. penicillin O potassium (allymercaptomethyl); 19. 1,2-diphenyl-2-methylamine ethanol penicillin; 20. pleocidin; 21. polymyxin B sulfate; 22. rimocidin; 23. streptomycin sulfate; 24. subtilin; 25. terramycin hydrochloride; 26. thiolutin; 27. tyrocidine hydrochloride; 28. tyrothricin; 29. viomycin sulfate; 30. viridin.In vitro tests were performed by a newly developed method with the 30 antibiotics against two strains of Tr. cruzi (Pack-Brazil-46 and WBHT). Out of the 30 antibiotics, 18 showed immobilizing or trypanocidal effects at the end of 5, 10, 15, and 60 minutes or at the end of 24 hours. The trypanostatic or trypanocidal effects ranged from dilutions of 1:10 to as high as dilutions 1:400,000, depending upon the antibiotics and time of contact periods. The remaining 12 antibiotics (Nos. 4, 5, 6, 7, 10, 13, 15, 16, 18, 19, 23, 29), used in highest concentrations practical, were innocuous to Tr. cruzi in vitro at the end of 24 hours' exposure period.In vivo tests, in spite of the above findings, were all essentially negative. None of the above 30 antibiotics, when administered intraperitoneally in maximum tolerated doses into mice infected with the virulent WBHT strain of Tr. cruzi, produced an absolute cure. All of the experimental animals, with the exception of a few which developed chronic infections, died of acute trypanosomiasis within two weeks. A few instances of suppressive action were obtained with the following antibiotics: endomycin, gramicidin, rimocidin, antibiotic S, thiolutin, tyrocidine hydrochloride, tyrothricin, and viridin. Although there were definite reductions in the number of trypanosomes present in the blood of these mice as compared with the number in the untreated mice, many died earlier than did the controls because of the toxicity of the drugs. The most marked suppression was produced by antibiotic S. However, no curative effects were obtained.
CV Raman and the Raman Effect (2009)

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 Barry R. Masters, "C.V. Raman and the Raman Effect," Optics & Photonics News 20(3), 40-45 (2009) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Some Observations of Shell-type Galactic Radio Sources (1967)

Radio evidence for two new supernova remnants in the Southern Milky Way is presented. Some new observations of the known supernova remnant, source 1439-62, and of the Rosette nebula, a shell source but not a supernova remnant, are also presented. The problem of finding model shells to fit the radio observations is considered and it is shown that the radio emission from 1439-62 is unlikely to originate in a shell with spherical symmetry.
Hydrodynamics of a gas‐liquid‐solid three phase circulating fluidized bed (1995)

Abstract The hydrodynamics of a gas‐liquid‐solid circulating fluidized bed was investigated. A new regime, the three phase circulating fluidization regime, was discovered for the first time. The characteristics of this regime were compared with that of the conventional fluidization regime and the transport regime. The particle circulation rate and the gas and solids holdups in circulating fluidization regime were studied.
Nuclear-Cytoplasmic Shuttling of Chibby Controls β-Catenin Signaling (2009)

In the canonical Wnt pathway, beta-catenin acts as a key coactivator that stimulates target gene expression through interaction with Tcf/Lef transcription factors. Its nuclear accumulation is the hallmark of active Wnt signaling and is frequently associated with cancers. Chibby (Cby) is an evolutionarily conserved molecule that represses beta-catenin-dependent gene activation. Although Cby, in conjunction with 14-3-3 chaperones, controls beta-catenin distribution, its molecular nature remains largely unclear. Here, we provide compelling evidence that Cby harbors bona fide nuclear localization signal (NLS) and nuclear export signal (NES) motifs, and constitutively shuttles between the nucleus and cytoplasm. Efficient nuclear export of Cby requires a cooperative action of the intrinsic NES, 14-3-3, and the CRM1 nuclear export receptor. Notably, 14-3-3 docking provokes Cby binding to CRM1 while inhibiting its interaction with the nuclear import receptor importin-alpha, thereby promoting cytoplasmic compartmentalization of Cby at steady state. Importantly, the NLS- and NES-dependent shuttling of Cby modulates the dynamic intracellular localization of beta-catenin. In support of our model, short hairpin RNA-mediated knockdown of endogenous Cby results in nuclear accumulation of beta-catenin. Taken together, these findings unravel the molecular basis through which a combinatorial action of Cby and 14-3-3 proteins controls the dynamic nuclear-cytoplasmic trafficking of beta-catenin.
Ground Control System for UAS Safe Landing Area Determination (SLAD) in Urban Air Mobility Operations (2022)

The use of the Unmanned Aerial Vehicles (UAV) and Unmanned Aircraft System (UAS) for civil, scientific, and military operations, is constantly increasing, particularly in environments very dangerous or impossible for human actions. Many tasks are currently carried out in metropolitan areas, such as urban traffic monitoring, pollution and land monitoring, security surveillance, delivery of small packages, etc. Estimation of features around the flight path and surveillance of crowded areas, where there is a high number of vehicles and/or obstacles, are of extreme importance for typical UAS missions. Ensuring safety and efficiency during air traffic operations in a metropolitan area is one of the conditions for Urban Air Mobility (UAM) operations. This paper focuses on the development of a ground control system capable of monitoring crowded areas or impervious sites, identifying the UAV position and a safety area for vertical landing or take-off maneuvers (VTOL), ensuring a high level of accuracy and robustness, even without using GNSS-derived navigation information, and with on-board terrain hazard detection and avoidance (DAA) capabilities, in particular during operations conducted in BVLOS (Beyond Visual Line Of Sight). The system is composed by a mechanically rotating real-time LiDAR (Light Detection and Ranging) sensor, linked to a Raspberry Pi 3 as SBC (Session Board Controller), and interfaced to a GCS (Ground Control Station) by wireless connection for data management and 3-D information transfer.
Design of a new decoupled XYZ compliant parallel micropositioning stage with compact structure (2009)

The design procedure for a new decoupled flexure-based XYZ compliant parallel-kinematics micropositioning stage is presented in this paper. The designed XYZ stage owns a compact structure constructed by three monolithic limbs and has both input and output decoupling properties. The output decoupling is allowed by the employment of a proposed 2-D compound parallelogram flexure, and the input decoupling is implemented by the actuation isolation which is enabled by the double compound parallelogram flexure with large transverse stiffness. The modeling for the output compliance, input stiffness, and amplification ratio of the XYZ stage are conducted by resorting to the matrix method, which are validated by the finite element analysis performed with ANSYS. The presented results are helpful for the design of a new XYZ compliant parallel micromanipulator for micro/nano scale manipulation.
The effect of post-oxygen-implant annealing temperature on the channel mobilities of CMOS devices in oxygen-implanted silicon-on-insulator structures (1987)

The effects of post-oxygen-implant annealing temperature on the characteristics of MOSFET's in oxygen-implanted silicon-on-insulator (SOI) substrates are studied. The results show significant improvements in the electron and hole mobilities near the silicon/buried-oxide interface and in the electron mobility of the front-gate n-channel transistors in SOI substrates with higher post-oxygen-implant annealing temperature. The improvements in the transistor characteristics hence are attributed to the annihilation of oxygen precipitates and the reduction of defect density in the residual silicon film. By comparing the ring oscillators fabricated in SOI substrates annealed at 1150°C and 1250°C after oxygen implantation, a speed improvement of 15 percent is observed in substrates annealed at higher temperature.
[Methods of studying motor function of the small intestine at a surgical clinic]. (1989)

On the basis of 200 many-hours investigations of motor function of the duodenum and jejunum performed in experiments and clinic with the help of polydigestograph "Express-MT" five degrees of its activity were established: negative, relative rest, weak, medial and strong. High exactness of the registration of intestinal motility at the early period after operations on the abdominal organs was proved. It was found that no complete extinction of the motor function of the small intestine was observed even under conditions of diffuse peritonitis.
Transformations of the explanatory variables in the logistic regression model for binary data (1987)

Some results are presented on improving the fit of the logistic regression model for binary data by transforming the vector of explanatory variables. The methods are based on consideration of the distributions of these variables conditional on outcome group. The transformations required are the functions of the explanatory variables which appear in the log density ratio of the conditional distributions.