gebhart/patrepeval huggingface dataset:
Disk Drive Roadmap from the Thermal Perspective (2005)

The importance of pushing the performance envelope of disk drives continues to grow, not just in the server market but also in numerous consumer electronics products. One of the most fundamental factors impacting disk drive design is the heat dissipation and its effect on drive reliability, since high temperatures can cause off-track errors, or even head crashes. Until now, drive manufacturers have continued to meet the 40% annual growth target of the internal data rates (IDR) by increasing RPMs, and shrinking platter sizes, both of which have counter-acting effects on the heat dissipation within a drive. As this paper will show, we are getting to a point where it is becoming very difficult to stay on this roadmap. This paper presents an integrated disk drive model that captures the close relationships between capacity, performance and thermal characteristics over time. Using this model, we quantify the drop off in IDR growth rates over the next decade if we are to adhere to the thermal envelope of drive design.We present two mechanisms for buying back some of this IDR loss with Dynamic Thermal Management (DTM). The first DTM technique exploits any available thermal slack, between what the drive was intended to support and the currently lower operating temperature, to ramp up the RPM. The second DTM technique assumes that the drive is only designed for average case behavior, thus allowing higher RPMs than the thermal envelope, and employs dynamic throttling of disk drive activities to remain within this envelope.
Evaluation of the effect of respiratory and anatomical variables on a Fourier technique for markerless, self-sorted 4D-CBCT (2013)

A novel technique based on Fourier transform theory has been developed that directly extracts respiratory information from projections without the use of external surrogates. While the feasibility has been demonstrated with three patients, a more extensive validation is necessary. Therefore, the purpose of this work is to investigate the effects of a variety of respiratory and anatomical scenarios on the performance of the technique with the 4D digital extended cardiac torso phantom. FT-phase and FT-magnitude methods were each applied to identify peak-inspiration projections and quantitatively compared to the gold standard of visual identification. Both methods proved to be robust across the studied scenarios with average differences in respiratory phase <10% and percentage of projections assigned within 10% of the gold standard >90%, when incorporating minor modifications to region-of-interest (ROI) selection and/or low-frequency location for select cases of DA and lung percentage in the field of view of the projection. Nevertheless, in the instance where one method initially faltered, the other method prevailed and successfully identified peak-inspiration projections. This is promising because it suggests that the two methods provide complementary information to each other. To ensure appropriate clinical adaptation of markerless, self-sorted four-dimensional cone-beam CT (4D-CBCT), perhaps an optimal integration of the two methods can be developed.
Draft Genome Sequences of Three Amino Acid-Secreting Lactococcus lactis Strains (2020)

Three <i>Lactococcus lactis</i> strains with the ability to secrete various amino acids (leucine, isoleucine, methionine, valine, glutamic acid, and histidine) were sequenced in order to identify the mechanisms involved in the secretion. Amino acids contribute to flavor formation; therefore, bacterial strains with this ability are relevant for the food industry.
The study on force, surface integrity, tool life and chip on laser assisted machining of inconel 718 using Nd:YAG laser source (2017)

Inconel 718, a high-temperature alloy, is a promising material for high-performance aerospace gas turbine engines components. However, the machining of the alloy is difficult owing to immense shear strength, rapid work hardening rate during turning, and less thermal conductivity. Hence, like ceramics and composites, the machining of this alloy is considered as difficult-to-turn materials. Laser assisted turning method has become a promising solution in recent years to lessen cutting stress when materials that are considered difficult-to-turn, such as Inconel 718 is employed. This study investigated the influence of input variables of laser assisted machining on the machinability aspect of the Inconel 718. The comparison of machining characteristics has been carried out to analyze the process benefits with the variation of laser machining variables. The laser assisted machining variables are cutting speeds of 60-150 m/min, feed rates of 0.05-0.125 mm/rev with a laser power between 1200 W and 1300 W. The various output characteristics such as force, roughness, tool life and geometrical characteristic of chip are investigated and compared with conventional machining without application of laser power. From experimental results, at a laser power of 1200 W, laser assisted turning outperforms conventional machining by 2.10 times lessening in cutting force, 46% reduction in surface roughness as well as 66% improvement in tool life when compared that of conventional machining. Compared to conventional machining, with the application of laser, the cutting speed of carbide tool has increased to a cutting condition of 150 m/min, 0.125 mm/rev. Microstructural analysis shows that no damage of the subsurface of the workpiece.
Optimal direct torque control of three-phase symmetric induction motors (2004)

Direct torque control (DTC) is a state of the art control methodology for induction motor drives which features very favorable control performance and implementation properties. However, one of its main deficiencies is the lack of a systematic design procedure for the inverter switching table, which is the core of the control system. This is addressed in this paper, where we propose a novel modelling and control approach for the DTC problem which is based on a systematic design procedure. The DTC drive comprising of a three-level dc-link inverter driving a three-phase induction motor is modelled in the hybrid mixed logical dynamical (MLD) framework, and a constrained optimal control problem is set up and solved over a receding finite horizon using model predictive control (MPC). Simulation results are provided and compared to the current industrial state of the art, which demonstrate the potential for performance improvements.
Basic Transplantation Methods in Rodent Brain (2000)

The two fundamental criteria for successful cell transplantation in the adult mammalian brain are, first, the selection of an appropriate donor tissue at a stage of development when it can survive and grow after transplantation, and, second, the selection of an implantation method and site within the host brain where the graft can be nourished, vascularized, and rapidly incorporated into the host environment (Stenevi et al., 1976). The first of these topics is addressed in the first seven chapters of the present volume, in which the selection, collection, dissection, and handling of embryonic tissues, cell lines, engineered cells, and artificial devices for implantation are each considered in some detail. The second section, introduced by the present chapter, considers the alternative methods of implantation available for transfer of the graft tissues into the nervous system of the host animal.
Efficient Vortex Laser With Annular Pumping Formed by Circle Dammann Grating (2015)

We proposed and demonstrated an efficient vortex Nd:YVO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> laser under the utilization of a circle Dammann grating (CDG). As a simple binary-phase component, CDG was inserted into the pump unit of this laser-diode end-pumped solid-state laser and reshaped the pump radiation into annular profile with high efficiency. Moreover, such utilization of CDG avoided additional modification to laser cavity. As a result, the laser emitted vortex beam with a high slope efficiency of 51% and a maximum beam power of 554 mW at 1.75-W incident pump power.
Kan förstainstansrättens andra avdelning utlokaliseras till Öresundsregionen (2000)

Att denna lokalisering av den dömande och ekonomiska verksamheten i Europa varit bra för lilla Luxemburg är entydigt, men är en dylik rättskoncentration bra för Europa? Detta inlägg granskar de problem domstolen står inför, diskuterar de alternativ som erbjuds och om en utlokalisering av den högsta rättsskipningen i Europa kan vara ett alternativ till en fortsatt koncentration till Luxemburg. Avslutningsvis diskuteras om Öresundsregionen med sin fina bro kan vara ett alternativ?
A Study of Irradiation-Induced Active Sites on Magnesium Oxide Using Electron Paramagnetic Resonance (1964)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of Irradiation-Induced Active Sites on Magnesium Oxide Using Electron Paramagnetic ResonanceJack H. LunsfordCite this: J. Phys. Chem. 1964, 68, 8, 2312–2316Publication Date (Print):August 1, 1964Publication History Published online1 May 2002Published inissue 1 August 1964https://pubs.acs.org/doi/10.1021/j100790a048https://doi.org/10.1021/j100790a048research-articleACS PublicationsRequest reuse permissionsArticle Views65Altmetric-Citations33LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
Physicochemical and texture properties of nanocrystalline ZnCo2O4spinel and effect ofγ-irradiation on its sintering process (2009)

Hydrozincite and spherocobaltite phases were obtained by coprecipitation of a mixture of zinc and cobalt nitrates using NaHCO3 at 60°C and pH=8. The solid precursor obtained was calcined in air at 400–800°C. The precursor and ZnCo2O4 were also exposed to γ-ray doses of 0·4, 0·8 and 1·6 MGy. A nanostructuredd ZnCo2O4 spinel was obtained after calcination. X-ray diffraction analysis showed that the cubic ZnCo2O4 phase was thermally stable in the temperature range 400–800°C. The grain size of the ZnCo2O4 phase was found to increase with increasing calcination temperature and γ-ray dose. X-ray diffraction results and SEM confirmed that γ-irradiation has a marked effect on grain growth. Total surface area S BET of the solid precursor was found to increase with increasing γ-ray dose owing to the creation of new pores. A marked decrease in S BET was observed after calcining at 400–800°C or after exposure to γ-rays. The decrease in S BET can be explained in terms of increasing crystallite size.
Feasibility of Solid-State Postpolymerization on Fossil- and Bio-Based Poly(butylene succinate) Including Polymer Upcycling Routes (2016)

Fossil-based and true bio-based poly(butylene succinate) (PBS) prepolymers were synthesized and submitted to solid-state polymerization (SSP) in the proximity of the polyester melting point (Tm), for reaction times up to 29 h under flowing nitrogen. SSP acted as a postcrystallization process, imparting an increase of the PBS melting point up to 126 °C from a starting Tm of 112–114 °C. Adding a precrystallization step prior SSP even resulted in a 2.5 times increase of the initial MW and a Tm shift up to 128 °C. Furthermore, the effect of most critical process parameters on the SSP feasibility and effectiveness was assessed, so as to launch an appropriate operation profile. End-group imbalance turned out to be the most significant key parameter for PBS polymerizability, and various attempts were made toward correcting it. Finally, SSP was examined as a PBS recycling technique and efficiently “revived” hydrolyzed PBS structures.
Semantic Sentiment Analysis of Arabic Texts (2017)

Twitter considered as a rich resource to collect people's opinions in different domains and attracted researchers to develop an automatic Sentiment Analysis (SA) model for tweets. In this work, a semantic Arabic Twitter Sentiment Analysis (ATSA) model is developed based on supervised machine learning (ML) approaches and semantic analysis. Most of the existing Arabic SA approaches represent tweets based on the bag-of-words (BoW) model. The main limitation of this model is that it is semantically weak; where words considered as independent features and ignore the semantic associations between them. As a result, synonymous words that appear in two tweets are represented as different independent features. To overcome this limitation, this work proposes enriching the tweets representation with concepts utilizing Arabic WordNet (AWN) as an external knowledge base. In addition, different concepts representation approaches are developed and evaluated with naïve Bayes (NB) and support vector machine (SVM) ML classifiers on an Arabic Twitter dataset. The experimental results indicate that using concepts features improves the performance of the ATSA model compared with the basic BoW representation. The improvement reached 4.48% with the SVM classifier and 5.78% with the NB classifier.
Increasing the Isomerisation Kinetics of Azo Dyes by Chemical Bonding to Liquid‐Crystalline Polymers (2011)

It is well known that the proper substitution of the azobenzene core allows tuning the thermal cis-to-trans isomerisation kinetics of azo dyes. The thermal isomerisation process of nitro-substituted azobenzenes is accelerated up to 13 times with respect to that in the common isotropic solvents when they are doped in nematic low molar mass liquid crystals. This kinetic acceleration is even stronger when these azo dyes are covalently linked to a nematic siloxane polymer. In this environment, the isomerisation process is accelerated more than 10(3) times. This effect is presented herein for the first time. The possible application of the networks obtained as possible photo-actuators has been also considered.
The nitrogen absorption of stainless steel weld metal by gas tungsten arc welding. (1984)

Using an arc atmosphere controlling chamber, effects of the welding conditions and atmosphere on the nitrogen content of the stainless steel weld metal by gas tungsten arc welding were investigated in comparison with those on the iron weld metal. The results are as follows:(1) The temperatures of stainless steel and iron molten pools were measured as about 1530°C and 1630°C, respectively.(2) The nitrogen content of stainless steel weld metal decreased with increasing the welding current, as well as that of iron weld metal.(3) The nitrogen content of stainless steel weld metal hardly depended on the arc length, as well as that of iron weld metal.(4) The nitrogen content of stainless steel weld metal increased with increasing the travel speed, while that of iron weld metal hardly depended on the travel speed.(5) The nitrogen content of stainless steel weld metal increased with the nitrogen partial pressure at low nitrogen partial pressure region, and was constant at the nitrogen partial pressure region above 0.2 atm in N2-Ar gas mixture atmosphere, as well as that of iron weld metal.(6) The nitrogen absorption by stainless steel weld metal was discussed with equilibrium data.
HIV-1 intermittent viraemia in patients treated by non-nucleoside reverse transcriptase inhibitor-based regimen (2005)

These results suggest that blips may reflect ongoing viraemia of below 50 copies/ml and can impair the CD4 cell count recovery under an NNRTI regimen. The impairment of CD4 cell count recovery seems to be affected more by the occurrence of blips than by the level of viraemia (< 50 copies/ml) itself. Nevertheless, despite a tight genetic barrier for resistance with NNRTI drugs, no virologic failure occurred during the follow-up.
Impulse coupling measurements for an ORION demonstration (1999)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Claude Phipps, Daniel Seibert, Christopher Reyerson, Robert Royse, Michael Lander, Jonathan W. Campbell, James P. Reilly; Impulse coupling measurements for an ORION demonstration. AIP Conf. Proc. 22 January 1999; 458 (1): 1635–1640. https://doi.org/10.1063/1.57565 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Lithium niobate double channel Fabry-Perot interferometer for solar corona uses (1988)

The use of a tunable etalon in the measurement of spectral profiles of solar corona emission lines is investigated. The etalon is a y-cut plate of lithium niobate. A suitable tuning range for the line is +/-1 A corresponding to an applied voltage of +/-1000 V for a thickness of 0.1 mm. A passband of 0.2 Acan realistically be obtained with an appropriate free spectral range of 6 A. Thermal analysis shows that a temperature excursion of 0.05 degrees C corresponds to a spectral drift of <0.05 FWHM. An emission line profile is obtained by scanning an ordinary-ray passband through the emission line, while measuring the difference between this signal and that from an adjacent extraordinary-ray passband. Using polarization chopping, the scattered-light component due to the sky and instrument is efficiently removed. The extraordinary-ray (reference) passband is insensitive to the applied voltage; hence the reference signal is substantially unaffected by the spectral modulation in the scattered light due to the solar absorption spectrum.
αvβ3 Integrin antagonists as inhibitors of bone resorption (2000)

The alpha(v)beta(3) integrin is a non-covalent, heterodimeric, cell-surface protein that is expressed with varying density on numerous cell types, including osteoclasts, vascular smooth muscle cells, endothelial cells and a variety of tumour cells. Functionally, alpha(v)beta(3) mediates a diverse range of biological events including the adhesion of osteoclasts to bone matrix, smooth muscle cell migration and angiogenesis. Specifically, there has been significant attention focused on the preparation of inhibitors of alpha(v)beta(3) for use as inhibitors of bone resorption, in recognition of the medical need for improved prevention and treatment of osteoporosis. Herein, we summarise the pertinent chemistry and biological advances in the medicinal design and biological evaluation of peptide and small molecule alpha(v)beta(3) antagonists as inhibitors of bone resorption.
Amikacin intoxication induces apoptosis and cell proliferation in rat organ of Corti (1998)

Recently, an attempt at cochlear hair cell neodifferentiation has been reported in amikacin-treated rats. In the present study, we aimed to ascertain whether hair cell losses are mediated by apoptosis and whether cell proliferation occurs in damaged intoxicated cochleas. The results show that apoptosis is responsible for hair cell losses and that cell proliferation occurs in the region of the outer spiral sulcus but not in the region of Deiters cells and pre-existing hair cells. We suggest that cell proliferation maintains a certain homeostasis in the number of non-sensory cells and participates in epithelial scar formation. Neodifferentiated cells therefore probably arise from direct transdifferentiation, which could be triggered by phagocytosis of apoptotic bodies.
Impacts of packet collisions on link throughput in CSMA wireless networks (2018)

It is known that packet collisions in wireless networks will deteriorate system performance, hence substantial efforts have been made to avoid collision in multi-user access designs. Also, there have been many studies on throughput analysis of CSMA wireless networks. However, for a typical CSMA network in which not all nodes can sense each other, it is still not well investigated how link throughputs are affected by collisions. We note that in practical 802.11-like networks, the time is divided into mini-timeslots and packet collisions are in fact unavoidable. Thus, it is desirable to move forward to explore how collisions in such a network will affect system performance. Based on the collision-free ideal CSMA network (ICN) model, this paper attempts to analyze link throughputs when taking the backoff collisions into account and examine the effect of collisions on link throughputs. Specifically, we propose an Extended Ideal CSMA Network (EICN) model to characterize the collision effects as well as the interactions and dependency among links in the network. Based on EICN, we could directly compute link throughputs and collision probabilities. Simulations show that the EICN model is of high accuracy. Under various network topologies and protocol parameter settings, the computation error of link throughputs using EICN is kept to 4% or below. Interestingly, we find that unlike expected, the effect of collisions on link throughputs in a modest CSMA wireless network is not significant, which enriches our understanding on practical CSMA wireless networks such as Wi-Fi.
Information and Communication Technology: Affects on U.S. College Students (2009)

Objectives: To identify information and communication technology’s (ICT) intrusiveness on college students by determining usage patterns and exploring affects on perceived stress. Methods: Questions related to demographics, ICT behavior and stress were used to measure perceived stress, ICT-related stress, and relationships between these variables among undergraduate college students (N=300). Results: Students preferred non-personal communication, and relationships were identified between ICT, being late for class, losing sleep, and stress. Conclusion: This investigation found ICT as a major intrusion affecting sleep, time management, and perceived stress as well as implications in students’ communication
Biological degradation of potato pulp waste and microbial community structure in microbial fuel cells (2017)

The syntrophic interactions between polysaccharide-degrading bacteria and exoelectrogens drove simultaneous alternative energy production and degradation of potato pulp waste in microbial fuel cells.