gebhart/patrepeval huggingface dataset:
Sleep-wake differences in scaling behavior of the human heartbeat: Analysis of terrestrial and long-term space flight data (1999)

We compare scaling properties of the cardiac dynamics during sleep and wake periods for healthy individuals, cosmonauts during orbital flight, and subjects with severe heart disease. For all three groups, we find a greater degree of anticorrelation in the heartbeat fluctuations during sleep compared to wake periods. The sleep-wake difference in the scaling exponents for the three groups is comparable to the difference between healthy and diseased individuals. The observed scaling differences are not accounted for simply by different levels of activity, but appear related to intrinsic changes in the neuroautonomic control of the heartbeat.
Ceramic Composites Emerging as Advanced Structural Materials (1988)

RETURN TO ISSUEPREVNewsNEXTCeramic Composites Emerging as Advanced Structural MaterialsResearchers are incorporating ceramic fibers, whiskers, and particulates into ceramics to produce advanced composites with improved properties such as fracture resistance, strength, high-temperature stabilityRON DAGANIView Author Information C&EN WashingtonCite this: Chem. Eng. News 1988, 66, 5, 7–12Publication Date (Print):February 1, 1988Publication History Published online8 November 2010Published inissue 1 February 1988https://pubs.acs.org/doi/10.1021/cen-v066n005.p007https://doi.org/10.1021/cen-v066n005.p007newsACS PublicationsCopyright © 1988 American Chemical SocietyArticle Views9Altmetric-Citations-LEARN 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 SUBJECTS:Ceramics Get e-Alerts
Infrared thermometry study of nanofluid pool boiling phenomena (2011)

Infrared thermometry was used to obtain first-of-a-kind, time- and space-resolved data for pool boiling phenomena in water-based nanofluids with diamond and silica nanoparticles at low concentration (<0.1 vol.%). In addition to macroscopic parameters like the average heat transfer coefficient and critical heat flux [CHF] value, more fundamental parameters such as the bubble departure diameter and frequency, growth and wait times, and nucleation site density [NSD] were directly measured for a thin, resistively heated, indium-tin-oxide surface deposited onto a sapphire substrate. Consistent with other nanofluid studies, the nanoparticles caused deterioration in the nucleate boiling heat transfer (by as much as 50%) and an increase in the CHF (by as much as 100%). The bubble departure frequency and NSD were found to be lower in nanofluids compared with water for the same wall superheat. Furthermore, it was found that a porous layer of nanoparticles built up on the heater surface during nucleate boiling, which improved surface wettability compared with the water-boiled surfaces. Using the prevalent nucleate boiling models, it was possible to correlate this improved surface wettability to the experimentally observed reductions in the bubble departure frequency, NSD, and ultimately to the deterioration in the nucleate boiling heat transfer and the CHF enhancement.
The Trials and Tribulations of Assembling Large Medical Imaging Datasets for Machine Learning Applications (2021)

With vast interest in machine learning applications, more investigators are proposing to assemble large datasets for machine learning applications. We aim to delineate multiple possible roadblocks to exam retrieval that may present themselves and lead to significant time delays. This HIPAA-compliant, institutional review board-approved, retrospective clinical study required identification and retrieval of all outpatient and emergency patients undergoing abdominal and pelvic computed tomography (CT) at three affiliated hospitals in the year 2012. If a patient had multiple abdominal CT exams, the first exam was selected for retrieval (n=23,186). Our experience in attempting to retrieve 23,186 abdominal CT exams yielded 22,852 valid CT abdomen/pelvis exams and identified four major categories of challenges when retrieving large datasets: cohort selection and processing, retrieving DICOM exam files from PACS, data storage, and non-recoverable failures. The retrieval took 3 months of project time and at minimum 300 person-hours of time between the primary investigator (a radiologist), a data scientist, and a software engineer. Exam selection and retrieval may take significantly longer than planned. We share our experience so that other investigators can anticipate and plan for these challenges. We also hope to help institutions better understand the demands that may be placed on their infrastructure by large-scale medical imaging machine learning projects.
Expression of collagen and matrix metalloproteinases in ruptured human anterior cruciate ligament: An in situ hybridization study (1996)

The biological basis for failure of the human anterior cruciate ligament to heal after rupture is unknown. Since this failure could be influenced by abnormalities in matrix protein production or degradation, or both, several diverse matrix protein markers were utilized to survey the state of these extracellular proteins in intrinsic anterior cruciate ligament fibroblasts. Matrix gene expression was visualized by in situ hybridization 9 to 365 days after rupture using probes for type-I collagen, collagenase, 72kDa-gelatinase, and tissue inhibitor of metalloproteinase. Remnants of anterior cruciate ligament were biopsied arthroscopically from 20 patients at reconstruction, fixed in 4% paraformaldehyde, and processed with cDNA probes for the aforementioned mRNAs. mRNA expression of type-I collagen was detected in all specimens, was equally distributed throughout the remnants, and remained evident even at 1 year after injury. Neither of the matrix-degrading enzymes nor their inhibitor (tissue inhibitor of metalloproteinase) was expressed at substantial levels at any time point. Collagen expression within the anterior cruciate ligament confirmed the viability of the ligament remnants for as long as 1 year after rupture. The lack of significant expression of the two matrix-degrading metalloproteinases by the fibroblasts is not consistent with an autodegradation of the remaining ruptured ligament tissue, and whether the lack of matrix remodelling may account, at least in part, for the poor healing response of the anterior cruciate ligament remains to be determined. This initial investigation by in situ hybridization techniques provides a descriptive profile of matrix gene expression in the damaged human anterior cruciate ligament.
Orale Immuntherapie zur Behandlung der Erdnussallergie: eine experimentelle Therapie, noch nicht in die Praxis übertragbar (2010)

Effects of a Protein Optimized Diet Combined with Moderate Resistance Training on the Postoperative Course in Older Patients with Hip Fracture
HCl Etching Behavior on Low-Tilt-Angle and Step-Free 4H-SiC Surfaces (2009)

We report on new observations made, when 4H-SiC, Si-face substrate mesas, having either low tilt-angle (&lt; 1°) with steps or step-free top surfaces, were exposed to three separate HCl etching conditions for five minutes at temperatures of 1130°C, 1240°C and 1390°C. We observed that HCl was ineffective at 1130°C, as etching was incomplete with abundant surface contamination. At 1240°C, screw dislocations were aggressively etched by HCl, while multiple shallow flat-bottomed etch pits were formed on step-free mesa surfaces. At 1390°C, step-flow etching dominated as large etch pits were formed at screw dislocations and previously step-free surfaces etched inward from mesa edges to form parallel rows of organized steps.
Cyber security in internet of things (2019)

Internet has become a vital part of our lives.The number of internet connected devices are increasing every day and approximate there will be 34 billion IoT devices by 2020.It is observed that security is very weak in these devices and they can be easily compromised by hacker as some manufactures failed to implement basic security.Current devices use standards that are easy to implement and works for most forms of communications and storage.There is no such standard solution that will work on every device within the Internet of Things, because of the varied constraints between different devices, resulting in classifications within the Internet of Things.This research addresses security challenges in the Internet of Things (IoT).To this end, it's the discussions of the IoT evolution, architecture and its applications in industries.Secondly, it classifies and examines privacy threats by survey, pointing out the challenges that need to be overcome to ensure that the Internet of Things becomes a reality.
ChemInform Abstract: METAL CLUSTER CATALYSIS. PART 5. PHOTOINITIATED HYDROSILYLATION IN THE PRESENCE OF TETRAHEDRAL HETEROMETAL CLUSTERS: CATALYSIS BY INTACT CLUSTERS (1983)

Abstract Die photoinitiierte Hydrosilylierung von Acetophenon (IV) in Gegenwart der Metall‐Cluster (I), (II) oder (III) führt zu den Verbindungen (VI) und (VII), deren Verhältnis bestimmt wird.
A Comprehensive Review of Defects Genealogy in Olivines: From the Mineral World to Modern Electrode Materials (2023)

The “Learning from nature” strategy is currently going through a renaissance period in modern materials science. Valuable experience gained by observing existing natural materials—minerals—paves the way towards design and modification of prospective functional materials for energy storage, which typically inherit the peculiarities of the parental minerals. The faults and flaws of the crystal structure—its defects—play a crucial role in determining both mechanical and electrochemical properties of the electrode materials. In this review, we endeavored to rethink the defect chemistry in triphylite-type positive electrode materials for metal-ion batteries and reflected on it from the perspective of their mineral olivine counterparts, thus establishing important correlations between point defects in olivine minerals and related electrode materials, their origin and formation processes. This work is meant to review geoscience and materials science perceptions of defects in triphylite-type electrode materials for Li- and Na-ion batteries.
Interview with Harold Lloyd (1962)

Research Article| July 01 1962 Interview with Harold Lloyd Arthur B. Friedman; Arthur B. Friedman Search for other works by this author on: This Site PubMed Google Scholar Harold Lloyd Harold Lloyd Search for other works by this author on: This Site PubMed Google Scholar Film Quarterly (1962) 15 (4): 7–13. https://doi.org/10.2307/1211184 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Arthur B. Friedman, Harold Lloyd; Interview with Harold Lloyd. Film Quarterly 1 July 1962; 15 (4): 7–13. doi: https://doi.org/10.2307/1211184 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentFilm Quarterly Search This content is only available via PDF. Copyright 1962 The Regents of the University of California Article PDF first page preview Close Modal You do not currently have access to this content.
Partial Characterization of Cell Surface Idiotypes on Alloantigen‐Activated T Lymphoblasts (1978)

T lymphoblasts of specificity Lewis anti-DA, Lewis anti-BN, BN anti-DA and L.BN anti-DA were purified on Ficoll-Paque from mixed leucocyte cultures on day 5. Blasts were radiolabelled with iodine-125 by the lactoperoxidase method and lysed by the aid of Nonidet P40. Idiotypic molecules were puried from the lysates by the use of anti-idiotypic antiserum of specificity anti-(Lewis anti-DA) and Staphylococcus aureus bearing protein-A. In this way, molecules with a molecular weight of 150,000 and 75,000 daltons could be isolated from Lewis anti-DA and L.BN anti-DA T lymphoblasts but no significant radioactivity was brought down by the same procedure from Lewis Lewis anti-BN or BN anti-DA T lymphoblasts. No additional molecules were detected on the lower molecular weight regions where light chains of Ig type as well as conventional products of the MHC genes would appear. The 150,000 dalton molecules are composed of two single polypeptide chains with a molecular weight of around 75,000 daltons. These data are in complete agreement with earlier results on antigen-binding, idiotypic receptors obtained from normal rat T lymphocytes.
Anomalous Hall effect in the high-temperature ferrimagnetic semiconductorsBaFe2±xRu4∓xO11 (2010)

Field and temperature dependences of the magnetic and transport properties of single crystals of ${\text{BaFe}}_{2+x}{\text{Ru}}_{4\ensuremath{-}x}{\text{O}}_{11}$ $(x=0.5,0.9,1.4)$ R-type ferrites are reported. A wide homogeneity range of Ru/Fe compositions allows to tune the strength of the anomalous Hall effect (AHE), the width of the semiconducting gap $(\ensuremath{\Delta})$, and the temperature of magnetic ordering $({T}_{C})$ within one structural family. These parameters are enhanced for higher Fe content. A large Hall resistivity ${\ensuremath{\rho}}_{xy}=77\text{ }\ensuremath{\mu}\ensuremath{\Omega}\text{ }\text{cm}$ observed in single-crystal ${\text{BaFe}}_{3.4}{\text{Ru}}_{2.6}{\text{O}}_{11}$ at 300 K is several orders of magnitude large than that observed for bulk magnetic materials, and comparable to the Hall resistivity of thin films of magnetite. The anomalous Hall coefficient ${R}_{s}$ changes sign at a characteristic temperature ${T}^{\ensuremath{\ast}}$ that depends on the Fe/Ru ratio, which we attribute to variations in the electronic band structure. The ${R}_{s}$ vs longitudinal resistivity $({\ensuremath{\rho}}_{xx})$ dependence of ${\text{BaFe}}_{3.4}{\text{Ru}}_{2.6}{\text{O}}_{11}$ can be described in terms of negative skew and positive side-jump scattering contributions that differ above and below ${T}^{\ensuremath{\ast}}$. The very small side jump $\ensuremath{\Delta}y$ estimated from the contribution to the AHE that is quadratic in ${\ensuremath{\rho}}_{xx}$ suggests that the AHE is caused by a Karplus-Luttinger (Berry phase) mechanism.
High Data Rate Transmission over High-Speed Trains in France (TGV) (2008)

Reducing the impact of transport on the human and economic environment is a great challenge. Today, an average of two hours is spent daily in the public transportation system. The IPSAT project, a French nationally funded collaborative project with INRETS, SNCF, GET, Cisco, and France Telecom, was undertaken to provide means of high-speed communication in the fast trains, called TGV. The challenges of this project were twofold. First, technically, it is known that the Doppler effect has a great impact on radio transmission, especially new coding/modulation techniques involving OFDM. Power, environment, and range limitations introduce additional challenges. Second, the economic model behind such a service is not well mastered as the problem still constitutes a niche market, and this Internet provisioning chain always involves more than a single partner; rather several, including the train operator. On the technical side, the project came out with several results ranging from a novel robust OFDM transmission system (similar to solutions found in the new mobile 802.11P system) to fast handover techniques switching from one technology to another when physical situations change (e.g., tunnels, urban zones). The project based its solution on rapid handover techniques with a fallover communication system based on a specific adaptive satellite antenna (ACCORDE). The solution is based on protocols such as Mobile IP and IEEE 802.21 for media-independent handover. Studies showed that satellite communications and WiMAX were good technical choices as the number of handovers is reduced and the throughput is sufficient. Wifi and 3G solutions showed their limitations in either range or throughput. They can, however, be used in some situations where the operator has no roaming agreements with other technologies. The presence of several operators on the different links (satellite, Internet, and local) showed the difficulty it could bring and raised the advantage of using Mobile IP. On the economic side, collaborations with American Railways systems in California permitted tuning up a business model that fits the European market and can be exported to different countries. The presence of a railroad operator and a telecommunications operator helped find the best economical solutions to design the financial package. It was shown that a satellite link rented on a yearly basis was a good economic compromise between bandwidth and deployment costs. The IPSAT project provided a very good understanding of global communications and global handover techniques. Some of its results can be exploited in other domains such as airway Internet provisioning.
High‐sensitivity detection of oxytetracycline using light scattering agglutination assay with aptasensor (2010)

We present an aptamer-based biosensor (aptasensor) for rapid and high-sensitive detection of oxytetracycline (OTC) antibiotic in PBS inside a Y-channel PDMS microfluidic device. The detection was made by real-time monitoring of the agglutination assay of ssDNA aptamer-conjugated polystyrene latex microspheres with proximity optical fibers. The agglutination assay was performed with serially diluted OTC antibiotic solutions using highly carboxylated polystyrene particles of 920 nm diameter conjugated with OTC-binding ssDNA aptamer. Proximity optical fibers were used to measure the increase in 45° forward light scattering of the aggregated particles by fixing them around the viewing cell of the device with stable angle and distance to the detector. The detection limit was around 100 ppb for the current aptasensor system with the detection time less than 3 min.
Myocardial Late Gadolinium Enhancement: Accuracy of T1 Mapping–based Synthetic Inversion-Recovery Imaging (2015)

The accuracy of the T1 map-based synthetic IR approach in the detection and quantification of myocardial LGE in patients with previous myocardial infarction was similar to that of conventional IR techniques. The use of T1 mapping to derive synthetic LGE images may reduce imaging times and operator dependence in future T1 mapping protocols with full left ventricular coverage.
B-spline snakes and a JAVA interface: an intuitive tool for general contour outlining (2002)

We present a novel formulation for B-spline snakes that can be used as a tool for fast and intuitive contour outlining. The theory is implemented in a platform independent JAVA interface, which allows real time computation of the snake curve. In this paper, our main focus is on two points. First, we propose a novel B-spline snake formulation, where the intrinsic scale of the spline model is adjusted a priori. It leads to a reduction of the number of parameters to be optimized and eliminates the need for internal energies. The approach solves the two main drawbacks of traditional snakes (slow convergence speed and difficult to adjust weighting factors for internal energy terms). Second, we comment on our experience using JAVA for the implementation of the snake and for the design of the graphical user interface. Our technique provides a very intuitive, user-friendly, and platform independent tool for contour outlining, generally applicable to a vast range of images. Several biomedical examples of applications are included to illustrate the versatility of the method.
Designing chemically selective microsensor arrays using ionic liquid doped ionomers (2013)

Development of techniques for designing microsensor arrays with high sensitivity and selectivity has been a continuing challenge in the field of chemical sensing. Typically, sensitivity defines the detection limit, the identification and differentiation of the various components in the gas mixtures is accomplished by the pattern of response, i.e. selectivity of the sensor array. In this study, the performance of four distinctly functionalized resonator-pixels is explored to show the capability of room temperature ionic liquids (RTILs) as selective sorbent materials in designing microsensor arrays for the application of chemical detection and gas discrimination. The response of multi-pixel resonator array functionalized with a single solid ionomer matrix, DPA-PS:BP, but doped with various RTILs is used to obtain frequency and Q-factor responses upon exposure to multianalyte volatile organic compounds and its mixtures. The responses generated from the carefully selected RTIL-doped ionomer is then used to explore the uniqueness of the responses which can be used in the determination of components in organic vapor mixtures. For better discrimination of gas mixtures, the uniqueness of sensor response to analytes is utmost important factor to be considered. This paper presents the results on the integration of RTIL-doped ionomer system for discrimination of gases and vapors.
Effect of High-Frequency Stimulation of the Subthalamic Nucleus on Subthalamic Neurons: An Intracellular Study (2003)

These results suggest that the mechanism of action of deep brain stimulation involves initial excitation followed by later inhibition of STN neurons at a cellular level rather than primary inhibition, as previously hypothesized.
Fuzzy systems modeling of in situ bioremediation of chlorinated solve n ts (2001)

A large-scale vadose zone-groundwater bioremediation demonstration was conducted at the Savannah River Site (SRS) by injecting several types of gases (ambient air, methane, and nitrous oxide and triethyl phosphate mixtures) through a horizontal well in the groundwater at a 175 ft depth. Simultaneously, soil gas was extracted through a parallel horizontal well in the vadose zone at a 80 ft depth Monitoring revealed a wide range of spatial and temporal variations of concentrations of VOCs, enzymes, and biomass in groundwater and vadose zone monitoring boreholes over the field site. One of the powerful modern approaches to analyze uncertain and imprecise data chemical data is based on the use of methods of fuzzy systems modeling. Using fuzzy modeling we analyzed the spatio-temporal TCE and PCE concentrations and methanotroph densities in groundwater to assess the effectiveness of different campaigns of air stripping and bioremediation, and to determine the fuzzy relationship between these compounds. Our analysis revealed some details about the processes involved in remediation, which were not identified in the previous studies of the SRS demonstration. We also identified some future directions for using fuzzy systems modeling, such as the evaluation of the mass balance of the vadose zone - groundwater system, and the development of fuzzy-ruled methods for optimization of managing remediation activities, predictions, and risk assessment.