gebhart/patrepeval huggingface dataset:
Development of an economical digital control method for a continuously running conveyor belt (2017)

The main advantage of conveyor belts that we usually use is that we can avoid material spillage to a considerable extent. This is noticeable when powdered materials like sand, cement, cement concrete, coal, etc. are transferred with their help. Other applications in food processing units, bottling plants, and wood log processing companies also make the study on economization of conveyor belt transfer as an important one. This paper presents a study of the development of an economical digital control method to control the movement and the stop of a continuously running conveyor belt. Different types of conveyor belt systems implemented in the industries are also studied in this paper. Simple electronics devices are used in this study. A control strategy for sensing the arrival of the material conveyed on the conveyor belt is done in the study. This method saves times and energy by avoiding multiple run of the belt with same material. The study presented here is done on a rubber belt.
Optimized Design of a Highly Efficient Three-Stage Doherty PA Using Gate Adaptation (2010)

We demonstrate an optimized design of a highly efficient three-stage Doherty power amplifier (PA) for the 802.16e mobile world interoperability for microwave access (WiMAX) application at 2.655 GHz. The “three-stage” Doherty PA is the most efficient architecture among the various Doherty PAs for achieving a high peak to average power ratio (PAPR) signal. However, it has a problem in that the carrier PA has to maintain a saturated state with constant output power when the other peaking PAs are turned on. We solved the problem using a gate envelope tracking (ET) technique. For the proper load modulation, the gate biases of the peaking PAs were adaptively controlled, and the peak power and maximum efficiency characteristics along the backed-off output power region were successfully achieved. Using Agilent's Advanced Design System and Matlab simulations, the overall behavior of the three-stage Doherty PA with the ET technique employed was fully analyzed, and the optimum design procedure is suggested. For the WiMAX signal with a 7.8-dB PAPR, the measured drain efficiency of the proposed three-stage Doherty PA is 55.4% at an average output power of 42.54 dBm, which is an 8-dB backed-off output power. Digital predistortion was used to linearize the proposed PA. After linearization, a -33.15 dB relative constellation error performance was achieved, satisfying the system specifications. This is the best performance of any 2.655-GHz WiMAX application ever reported, and it clearly shows that the proposed three-stage Doherty PA is suitable as a highly efficient and linear transmitter.
Patellar fractures: pseudoarthroses and malunions (1996)

Log in or Register Get new issue alertsGet alerts Enter your Email address: Wolters Kluwer Health may email you for journal alerts and information, but is committed to maintaining your privacy and will not share your personal information without your express consent. For more information, please refer to our Privacy Policy. Subscribe to eTOC Secondary Logo Journal Logo All Articles Images Videos Podcasts Blogs Advanced Search Toggle navigation Register Login HomeCurrent IssuePrevious Issues Current Orthopaedic PracticeCurrent Opinion in Orthopaedics (1999-2007)Clinical Orthopaedics and Related Research (1976-2007) Published Ahead-of-PrintCOP eNewsMy CollectionsJournal Info About the JournalEditorial BoardInformation for AuthorsAdvertisingOpen AccessSubscription ServicesReprintsRights and Permissions All Articles Images Videos Podcasts Blogs Advanced Search
Automatic segmentation of uterine endometrial cancer on multi-sequence MRI using a convolutional neural network (2021)

Endometrial cancer (EC) is the most common gynecological tumor in developed countries, and preoperative risk stratification is essential for personalized medicine. There have been several radiomics studies for noninvasive risk stratification of EC using MRI. Although tumor segmentation is usually necessary for these studies, manual segmentation is not only labor-intensive but may also be subjective. Therefore, our study aimed to perform the automatic segmentation of EC on MRI with a convolutional neural network. The effect of the input image sequence and batch size on the segmentation performance was also investigated. Of 200 patients with EC, 180 patients were used for training the modified U-net model; 20 patients for testing the segmentation performance and the robustness of automatically extracted radiomics features. Using multi-sequence images and larger batch size was effective for improving segmentation accuracy. The mean Dice similarity coefficient, sensitivity, and positive predictive value of our model for the test set were 0.806, 0.816, and 0.834, respectively. The robustness of automatically extracted first-order and shape-based features was high (median ICC = 0.86 and 0.96, respectively). Other high-order features presented moderate-high robustness (median ICC = 0.57-0.93). Our model could automatically segment EC on MRI and extract radiomics features with high reliability.
Accuracy investigation of SFCW radar in human vital signs detection for subject's relative position (2017)

In this paper, the effects of different subject orientations, and multiple subjects in human vital sign detection using stepped frequency continuous wave (SFCW) radar are analyzed. The accuracy performance is validated with an electromagnetic scattering human ribcage model. Both of simulation and measurement results are demonstrated in this work.
Fluorescence Properties of a Hydrophilic Sensitizer in Pigmented Rats, Rabbits, and Monkeys (1999)

NPe6 fluorescence allows evaluation of drug availability within the retinal and choroidal circulation and visualization of pathological lesions before commencement of photodynamic therapy.
Analysis of a double step microstrip discontinuity in the substrate using the 3D-FDTD method (1996)

The finite-difference time-domain (FDTD) method has been applied to the analysis of a double step microstrip discontinuity having thickness changes in the longitudinal direction. The discontinuity occurs in patch antenna feeds or interconnections between microwave planar circuit modules. The simulation results are compared with those computed by HFSS to show a good agreement. An equivalent circuit for the double step discontinuity is developed from the scattering parameters computed by the FDTD method.
High-quality speech at low bit rates: Multi-pulse and stochastically excited linear predictive coders (2005)

We will present in this paper some recent developments in low bit rate speech coding research. Two new speech coding algorithms - multi-pulse LPC and stochastic coding (code-excited linear prediction) - have been proposed recently to achieve high quality speech at bit rates below 10 kbits/sec. Both of these algorithms use a linear filter to synthesize speech at the receiver but they differ in the methods used to generate the excitation for the linear filter. The multi-pulse model assumes that the excitation can be represented with sufficient accuracy as a sequence of pulses (typically 4 to 8 pulses every 5 msec). In stochastic coders, the excitation is selected from a random codebook of white Gaussian sequences. The optimum excitation in both these coders is chosen to minimize a subjective error criterion based on properties of human auditory perception. Although these coding algorithms are complex requiring over 10 million multiply-add operations per second, new fast digital signal processor chips offer the possibility of their real-time implementation.
Stochastic Event Capture Using Mobile Sensors Subject to a Quality Metric (2007)

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Mobile sensors cover more area over a fixed period of time than do the same number of stationary sensors. However, the quality of coverage (QoC) achieved by mobile sensors depends on the velocity, mobility pattern, number of mobile sensors deployed, and the dynamics of the phenomenon being sensed. The gains attained by mobile sensors over static sensors and the optimal motion strategies for mobile sensors are not well understood. In this paper, we consider the following event capture problem: the events of interest arrive at certain points in the sensor field and disappear according to known arrival and departure time distributions. An event is said to be captured if it is sensed by one of the mobile sensors before it fades away. We analyze how the QoC scales with velocity, path, and number of mobile sensors. We characterize cases where the deployment of mobile sensors has no advantage over static sensors, and find the optimal velocity pattern that a mobile sensor should adopt. We also present algorithms for two motion planning problems: 1) for a single sensor, what is the sensor trajectory and the <emphasis emphasistype="italic">minimum speed</emphasis> required to satisfy a bound on the event loss probability and 2) for sensors with fixed speed, what is the <emphasis emphasistype="italic">minimum number of sensors</emphasis> required to satisfy a bound on the event loss probability. When the robots are restricted to move along a line or a closed curve, our algorithms return the optimal velocity for the minimum velocity problem. For the minimum sensor problem, the number of sensors used is within a factor of 2 of the optimal solution. For the case where the events occur at arbitrary points on a plane, we present heuristic algorithms for the aforementioned motion planning problems and bound their performance with respect to the optimal. </para>
Oral Tolerance to Environmental Mycobacteria Interferes with Intradermal, but Not Pulmonary, Immunization against Tuberculosis (2016)

Bacille Calmette-Guérin (BCG) is currently the only approved vaccine against tuberculosis (TB) and is administered in over 150 countries worldwide. Despite its widespread use, the vaccine has a variable protective efficacy of 0-80%, with the lowest efficacy rates in tropical regions where TB is most prevalent. This variability is partially due to ubiquitous environmental mycobacteria (EM) found in soil and water sources, with high EM prevalence coinciding with areas of poor vaccine efficacy. In an effort to elucidate the mechanisms underlying EM interference with BCG vaccine efficacy, we exposed mice chronically to Mycobacterium avium (M. avium), a specific EM, by two different routes, the oral and intradermal route, to mimic human exposure. After intradermal BCG immunization in mice exposed to oral M. avium, we saw a significant decrease in the pro-inflammatory cytokine IFN-γ, and an increase in T regulatory cells and the immunosuppressive cytokine IL-10 compared to naïve BCG-vaccinated animals. To circumvent the immunosuppressive effect of oral M. avium exposure, we vaccinated mice by the pulmonary route with BCG. Inhaled BCG immunization rescued IFN-γ levels and increased CD4 and CD8 T cell recruitment into airways in M. avium-presensitized mice. In contrast, intradermal BCG vaccination was ineffective at T cell recruitment into the airway. Pulmonary BCG vaccination proved protective against Mtb infection regardless of previous oral M. avium exposure, compared to intradermal BCG immunization. In conclusion, our data indicate that vaccination against TB by the pulmonary route increases BCG vaccine efficacy by avoiding the immunosuppressive interference generated by chronic oral exposure to EM. This has implications in TB-burdened countries where drug resistance is on the rise and health care options are limited due to economic considerations. A successful vaccine against TB is necessary in these areas as it is both effective and economical.
Sequential CH Arylation and Olefination: Total Synthesis of the Proposed Structure of Pipercyclobutanamide A (2012)

Hip to be square: A strategy for assembling tetrasubstituted cyclobutanes is reported in the context of a short, protecting-group-free synthesis of the proposed structure of pipercyclobutanamide A. The route features sequential CH functionalizations on an unactivated cyclobutane wherein CC bonds to aryl and styryl groups are made one by one in a stereocontrolled fashion. DG=directing group. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Determination of the Rat in Vivo Pharmacokinetic Profile of a Bone-Targeting Dual-Action Pro-Drug for Treatment of Osteoporosis (2015)

The in vivo hydrolytic pathway of a dual-function bone-targeting EP4 receptor agonist-bisphosphonate pro-drug was deduced from radiolabeling experiments. A (14)C labeled pro-drug was used to monitor liberation of the bisphosphonate and results were compared to parallel studies where the EP4 receptor agonist was labeled with (3)H. The bone-adsorption of the (14)C pro-drug following an IV bolus was about 10% compared to 7.8% for the tritiated pro-drug. The difference in release half-life (5.2 and 19.7 days from (3)H and (14)C experiments, respectively) indicated that, after binding to bone, the initial hydrolysis occurred at the ester moiety of the linker releasing the EP4 agonist. The conjugate was found to concentrate in more porous, high-surface-area regions of the long bones. Both (3)H and (14)C experiments indicated a short circulating half-life (1-2 h) in blood.
Cognitive Ergonomics for Websites: From Concept to Realization (2000)

Our design process which integrates distinct techniques, knowledge, and experience from fields of cognition, human computer interaction, systems engineering, and usability engineering is used to formulate new Internet based ventures. New business ventures begin with an idea that is incubated using a specialized process for strategizing, conceptualizing, and gaining funding for actual development. Cognitive ergonomics is integral in focusing early conceptual work toward the end-user with a “concept car” presented to sell the idea in the early design stage. Methods are further detailed for later stages of design within a consulting environment. Organizational challenges are discussed in relation to implementing this design process.
Innovate Strategies for Future Weed Management (2015)

The world is working out alternatives to change the concept of weed management in future. Automation is being projected as a potential option; be it for a precise application of herbicides or to overcome non availability of labour for manual weeding. It is intended to arouse attention of all concerned to debate the international developments and plan an appropriate national strategy.
Impedance measurement of three phase systems in DQ-domain: Applying MIMO-identification techniques (2016)

Grid impedance and the output impedance of grid-connected inverter are important parameters for the operation of grid-connected systems, such as solar, wind, and other distributed-generation resource systems. The impedance mismatch between the grid and the interfacing circuit often generates harmonic resonances that lead to reduced power quality. Since the impedances usually vary over time with many parameters, online measurements are required for adaptive control of the inverters. Several methods have been proposed for quick, accurate measurements of impedances, but the use of multiple-input multiple-output (MIMO) identification techniques have not been considered. Applying the MIMO techniques, different components of the inverter output impedance or grid impedance can be simultaneously measured during a single measurement cycle. Therefore, the operating conditions of the system can be kept constant during the measurements, and the overall measurement time is significantly reduced. This paper shows the use of orthogonal binary sequences to simultaneously measure the d- and q-components of grid-connected inverter output impedance. Experimental results based on a three-phase grid-connected inverter are presented and used to demonstrate the effectiveness of the proposed methods.
Preparation and Characterization of Rare Earth Doped Fluoride Nanoparticles (2010)

This paper reviews the synthesis, structure and applications of metal fluoride nanoparticles, with particular focus on rare earth (RE) doped fluoride nanoparticles obtained by our research group. Nanoparticles were produced by precipitation methods using the ligand ammonium di-n-octadecyldithiophosphate (ADDP) that allows the growth of shells around a core particle while simultaneously avoiding particle aggregation. Nanoparticles were characterized on their structure, morphology, and luminescent properties. We discuss the synthesis, properties, and application of heavy metal fluorides; specifically LaF3:RE and PbF2, and group IIA fluorides. Particular attention is given to the synthesis of core/shell nanoparticles, including selectively RE-doped LaF3/LaF3, and CaF2/CaF2 core/(multi-)shell nanoparticles, and the CaF2-LaF3 system.
Flux de gaz en milieu poreux réactif déformable : relation entre texture, propriétés mécaniques et transferts : incidence sur la mise en oeuvre des réactifs et les performances de pompes à chaleur chimiques solide-gaz (1990)

La problematique generale des pompes a chaleur chimiques solide-gaz (pacc) est traitee dans une premiere partie. On y montre comment adapter le procede et selectionner les reactifs selon certains criteres technico-economiques en vue d'une application donnee. L'incidence sur deux criteres primordiaux: densite energetique et puissance, de la mise en uvre du milieu poreux reactif, melange de sel participant a la reaction et d'un liant inerte (graphite expanse) favorisant les transferts, est soulignee. En deuxieme partie sont etudies plus specifiquement les transferts de gaz a travers de tels milieux. Apres avoir fait le point des differentes lois phenomenologiques regissant ces ecoulements et des correlations connues entre les parametres de transfert et la texture et/ou les proprietes mecaniques, tous caracteristiques du milieu, il est montre en quoi la specificite de nos milieux poreux experimentes, a savoir leur tres grande deformabilite, explique les performances elevees obtenues en transfert de chaleur et de masse
Ultrastable g-C3N4 assemblies with high quantum yield and reversible photoluminescence (2018)

Ultrastable g-C<sub>3</sub>N<sub>4</sub> assemblies consisting of amorphous/crystalline nanosheets with high quantum yields up to 78% were prepared for the first time. A reversible photoluminescence was observed from green to blue when the pH was adjusted. Conversely, this phenomenon was not observed for amorphous or crystalline samples. These assemblies exhibit high stability in PL devices.
DESIGN CONSIDERATIONS FOR TRUWKED RADIO SYSTEHS (1986)

The desi of the Motorola Ttwnked Radio System in use in tR 800 MHz band in the United States is reviewed. The performance of the Message, Transmission, and Quasi-Transmission ttwnked channel assi ent strat ies is compared. Based on studies o 3? ttwnked sys 7! ems in operation in the US, Transmission and Quasi-Transmission trunking are shown to be more efficient than Message trmking. The sipaling channel of the Trunked System is used to receive service requests from mobile and portable units and transmit back chamel assignments. If all voice channels are busy, requests are queued. Capacity requirements for the %%!Based systems are shown to be higher than channel used in Transmission those for Message TNnked Systems.
Evolution of tribo-induced interfacial nanostructures governing superlubricity in a-C:H and a-C:H:Si films (2017)

Hydrogenated amorphous carbon (a-C:H) is capable of providing a near-frictionless lubrication state when rubbed in dry sliding contacts. Nevertheless, the mechanisms governing superlubricity in a-C:H are still not well comprehended, mainly due to the lack of spatially resolved structural information of the buried contact surface. Here, we present structural analysis of the carbonaceous sliding interfaces at the atomic scale in two superlubricious solid lubricants, a-C:H and Si-doped a-C:H (a-C:H:Si), by probing the contact area using state-of-the-art scanning electron transmission microscopy and electron energy-loss spectroscopy. The results emphasize the diversity of superlubricity mechanisms in a-C:Hs. They suggest that the occurrence of a superlubricious state is generally dependent on the formation of interfacial nanostructures, mainly a tribolayer, by different carbon rehybridization pathways. The evolution of such anti-friction nanostructures highly depends on the contact mechanics and the counterpart material. These findings enable a more effective manipulation of superlubricity and developments of new carbon lubricants with robust lubrication properties.
Darstellung und Kristallstruktur des ersten polymeren Phosphorselenids catena‐(P4Se4)x (1994)

Abstract Catena ‐(P 4 Se 4 ) x wurde aus den Elementen unter dem katalytischen Einfluß von Iod in kristalliner Form dargestellt. Die Charakterisierung erfolgte röntgenographisch sowie IR‐spektroskopisch. Nach einer Strukturbestimmung an einem Einkristall (Raumgruppe P2 1 /c, a = 1 119,2(3), b = 728,2(2), c = 1 142,5(3) pm, β = 115,91(2)°, V = 837,5(7) · 10 6 pm 3 ) liegen darin parallele Ketten Se‐verbrückter P 4 Se 3 ‐hetero‐Norbornan‐Einheiten vor. Als erstes nicht aus diskreten Molekülen aufgebautes Phosphorselenid kann catena ‐(P 4 Se 4 ) x sowohl als polymerisierte Form des α‐P 4 Se 4 wie auch als kristalline Modifikation eines Phosphoreselenidglases aufgefaßt werden.
Mass Spectrometric Evidence That Agents That Cause Loss of Ca2+ from Intracellular Compartments Induce Hydrolysis of Arachidonic Acid from Pancreatic Islet Membrane Phospholipids by a Mechanism That Does Not Require a Rise in Cytosolic Ca2+ Concentration (1998)

Stimulation of pancreatic islets with glucose induces phospholipid hydrolysis and accumulation of nonesterified arachidonic acid, which may amplify the glucose-induced Ca2+ entry into isletβ -cells that triggers insulin secretion. Ca2+ loss fromβ -cell intracellular compartments has been proposed to induce both Ca2+ entry and events dependent on arachidonate metabolism. We examine here effects of inducing Ca2+ loss from intracellular sequestration sites with ionophore A23187 and thapsigargin on arachidonate hydrolysis from islet phospholipids. A23187 induces a decline in islet arachidonate-containing phospholipids and release of nonesterified arachidonate. A23187-induced arachidonate release is of similar magnitude when islets are stimulated in Ca2+-replete or in Ca2+-free media or when islets loaded with the intracellular Ca2+ chelator BAPTA are stimulated in Ca2+-free medium, a condition in which A23187 induces no rise in β-cell cytosolic [Ca2+]. Thapsigargin also induces islet arachidonate release under these conditions. A23187- or thapsigargin-induced arachidonate release is prevented by a bromoenol lactone (BEL) inhibitor of a β-cell phospholipase A2 (iPLA2), which does not require Ca2+ for catalytic activity and which is negatively modulated by and physically interacts with calmodulin by Ca2+-dependent mechanisms. Agents that cause Ca2+ loss from islet intracellular compartments thus induce arachidonate hydrolysis from phospholipids by a BEL-sensitive mechanism that does not require a rise in cytosolic [Ca2+], and a BEL-sensitive enzyme-like iPLA2 or a related membranous activity may participate in sensing Ca2+ compartment content.