Relevant bibliographies by topics / VGF method

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'VGF method'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "VGF method"

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Sun, T., K. Tang, H. Cui, and H. Fan. "THERMOLUMINESCENCE OF NEWLY DEVELOPED HIGHLY SENSITIVE α-Al2O3:C BY THE VERTICAL GRADIENT FREEZING METHOD." Radiation Protection Dosimetry 184, no. 2 (November 17, 2018): 174–78. http://dx.doi.org/10.1093/rpd/ncy196.

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Abstract A highly sensitive α-Al2O3:C crystal was directly grown by the vertical gradient freezing (VGF) method using Al2O3 and graphite powder as the raw materials. The main thermoluminescence (TL) characteristics of α-Al2O3:C detectors grown by the VGF method and TLD-500K detectors were compared. The α-Al2O3:C grown by the VGF method shows good dosimetric properties, such as high TL sensitivity (152 times higher than that of the TLD-100 at heating rate of 1°C/s), an extremely low residual signal of 0.03%, a minimum measurable dose of 0.12 μGy and an excellent linear response within the dose range studied from 1 μGy to 10 Gy. The α-Al2O3:C detectors grown by the VGF method have a higher sensitivity and a better linear response compared to the TLD-500K detectors. Both kinds of α-Al2O3:C can be used in an unannealed form and to measure the very low dose in environmental monitoring and personnel dosimetry.
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Stenzenberger, J., T. Bünger, F. Börner, S. Eichler, T. Flade, R. Hammer, M. Jurisch, U. Kretzer, S. Teichert, and B. Weinert. "Growth and characterization of 200mm SI GaAs crystals grown by the VGF method." Journal of Crystal Growth 250, no. 1-2 (March 2003): 57–61. http://dx.doi.org/10.1016/s0022-0248(02)02214-5.

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Badhan, SA, S. Haque, M. Akteruzzaman, N. Zaman, K. Nahar, and F. Yeasmin. "Role of social safety net programmes for ensuring food security and reducing poverty in char area of Jamalpur district in Bangladesh." Progressive Agriculture 30, no. 1 (July 17, 2019): 75–85. http://dx.doi.org/10.3329/pa.v30i1.42211.

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The study has been conducted to assess the social safety net programmes for ensuring food security and poverty reduction in char area of Jamalpur district, Bangladesh during the period of July-August in 2016. Survey method was used to collect primary data from Madargonj upazila of Jamalpur district. A total of 60 sample households were selected purposively for collecting data where 25 were under old age allowance, 15 were widow allowance and 20 were VGF/VGD card holders. Descriptive and tabular analysis was used to achieve the major objectives of the study. There are many Safety Net Programmes launched in the study area, like old age allowance, widow allowance, VGD/VGF, test relief, food for works and so on. The findings showed that after getting the allowance, the food consumption pattern, health, etc. are improving. Before joining SSNPs, about 77% people were food insecure but now the value is 68% and their calorie intake is 1834 kcal. The food security index became 0.79 and the food insecure household fall short of required calorie intake by 18 percent. It has been found that about 55% respondents are living below the poverty line but the joining to the SSNP, their situation is improving. Finally, it can be said that the SSNPs are much effective and could be a successful poverty alleviation strategy for the Government of Bangladesh. Progressive Agriculture 30 (1): 75-85, 2019
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Sun, T., K. Tang, H. Cui, H. Zhu, and H. Fan. "Optically stimulated luminescence of α-Al2O3:C by the vertical gradient freezing (VGF) method." Journal of Luminescence 205 (January 2019): 568–71. http://dx.doi.org/10.1016/j.jlumin.2018.10.014.

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Jin, Min, Jia Yue Xu, Qing Bo He, Yong Zheng Fang, Hui Shen, Zhan Yong Wang, and Guo Jian Jiang. "Growth of Undoped GaAs Single Crystal by Pulling-Down Method." Materials Science Forum 663-665 (November 2010): 1213–16. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.1213.

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Undoped GaAs single crystal has been grown in PBN crucibles by the pulling-down method. The temperature profile of the furnace was optimized with a narrow melting zone and a small temperature gradient at the solid-liquid interface. Quartz ampoules were used to protect the evaporation of As during the growth and the deformation of the ampoule was discussed as a function of temperature, time and pressure differential. A Ø56 mm×70 mm GaAs crystal with nearly 100 % single crystalline yield was obtained. X-ray rocking curve analysis revealed the excellent crystalline quality. The average EPD and electrical properties of the crystal were tested comparable to those of the crystal produced by the VGF method. Therefore, the pulling down method was a feasible approach for GaAs crystal production.
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Dropka, Natasha, Stefan Ecklebe, and Martin Holena. "Real Time Predictions of VGF-GaAs Growth Dynamics by LSTM Neural Networks." Crystals 11, no. 2 (January 29, 2021): 138. http://dx.doi.org/10.3390/cryst11020138.

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The aim of this study was to assess the aptitude of the recurrent Long Short-Term Memory (LSTM) neural networks for fast and accurate predictions of process dynamics in vertical-gradient-freeze growth of gallium arsenide crystals (VGF-GaAs) using datasets generated by numerical transient simulations. Real time predictions of the temperatures and solid–liquid interface position in GaAs are crucial for control applications and for process visualization, i.e., for generation of digital twins. In the reported study, an LSTM network was trained on 1950 datasets with 2 external inputs and 6 outputs. Based on network performance criteria and training results, LSTMs showed the very accurate predictions of the VGF-GaAs growth process with median root-mean-square-error (RMSE) values of 2 × 10−3. This deep learning method achieved a superior predictive accuracy and timeliness compared with more traditional Nonlinear AutoRegressive eXogenous (NARX) recurrent networks.
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Birkmann, B., M. Rasp, J. Stenzenberger, and G. Müller. "Growth of 3″ and 4″ gallium arsenide crystals by the vertical gradient freeze (VGF) method." Journal of Crystal Growth 211, no. 1-4 (April 2000): 157–62. http://dx.doi.org/10.1016/s0022-0248(99)00832-5.

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Ahmadi, Hamed, Afsaneh Barzi, Primo Lara, David I. Quinn, Eric A. Klein, Inderbir Gill, and Sarmad Sadeghi. "Impact of overall survival (OS) as a function of facility caseload on feasibility of referral of radical prostatectomy (RP) to higher volume facilities." Journal of Clinical Oncology 38, no. 6_suppl (February 20, 2020): 363. http://dx.doi.org/10.1200/jco.2020.38.6_suppl.363.

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363 Background: We recently reported a significant all-cause mortality (ACM) risk reduction associated with higher annual caseload for RP (PMID 31398279). Four volume groups (VG) were defined as VG1: <50th, VG2: 50th-74th, VG3: 75th-89th and VG4: top 10 percentile of caseload. The adjusted OS difference between VG1 and VG4 at 90th percentile survivorship reached 13.2 months, HR 1.30 (p<0.0001). Here we explore this economics of referral to VG4. Methods: Using a Markov model, we designed 4 scenarios (Sc) where 100,000 RPs were performed. In Sc 1 all RPs were performed at VG1; in Sc 2, 3 & 4, all RPs were performed at VG2, 3 &4 respectively. Subjects were followed for up to 20 years after RP. Survival and costs of care for each Sc were recorded. Probabilities of PSA recurrence (PSAR), development of metastatic disease (Met), cancer specific mortality (CSM) and ACM were adjusted for each VG according to the published HRs. Savings resulting from fewer recurrences, avoidance of salvage radiation therapy (SRT) and management of fewer Met were calculated. Standard discounting at 3% were applied to costs and benefits. Survival benefit and costs savings associated with making referrals from VG1, VG2, or VG3 centers to VG4 center were calculated. Using a willingness to pay (WTP) of $50K per life years gained (LYG), the maximum referral costs (MRC) were calculated. Results: Referral from a VG1 to a VG4 center was associated with highest OS benefit of 720 LYG at 20 years of follow up per 1000 referrals (PKR). Within a WTP of $50K, MRC of up to $37K was cost effective- Table. Conclusions: Given the survival benefit associated with performing RP at facility with high annual caseload, significant resources could be allocated to making a referral possible while still remaining within cost effectiveness boundaries.[Table: see text]
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Leenders, A., M. Ullrich, L. O. Kautschor, and H. C. Freyhardt. "High temperature deformation of vertical gradient freeze method melt-textured Y1Ba2Cu3O7−x." Journal of Materials Research 14, no. 2 (February 1999): 354–58. http://dx.doi.org/10.1557/jmr.1999.0052.

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The deformation behavior of melt-textured Y1Ba2Cu3O7-x (YBCO) prepared by the vertical gradient freeze (VGF) method was investigated by high temperature deformation experiments at temperatures ranging from 850 to 950 °C. The experiments were performed in an atmosphere of pure oxygen under uniaxial pressure with constant strain rates in the range from 1 × 10−5 to 5 − 10−4 s−1. An analysis of the dependence of the steady state flow stress on the strain rate and the deformation temperature reveals that the predominant deformation mechanism is dislocation glide and climb controlled by climb at Y-211 particles and that no significant grain boundary sliding occurs. Furthermore, transmission electron microscopy observations of deformed and undeformed samples support a deformation mechanism based on dislocation movement. The total fracture strain, however, does not depend on the temperature or strain rate. Scanning electron microscopy investigations of the fracture faces of samples deformed until fracture reveal that fracture does not occur within the Y-123 matrix but along platelet boundaries. An improvement of the fracture behavior is expected by introducing large Y-211 particles interconnecting neighboring platelets.
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Zade, Shanti Kiran, Suresh Babu V., and Sai Srinadh K.V. "Effect of nanoclay, glass fiber volume and orientation on tensile strength of epoxy-glass composite and optimization using Taguchi method." World Journal of Engineering 15, no. 2 (April 9, 2018): 312–20. http://dx.doi.org/10.1108/wje-08-2017-0286.

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Purpose The purpose of this study is to manufacture test boards for re-enacting plant or field situations where vacuum chamber for expelling gas bubbles and autoclave equipment would not be accessible. This research focuses on the examination and enhancement of tensile strength for the nanocomposites consisting of uniaxial glass fiber mats, nanoclay (NC) and epoxy. Design/methodology/approach The parameters considered are the weight content of Cloisite 15A NC, the volume of glass fiber (Vgf) and the direction of glass fibers (θ). The composites are made by hand lay-up technique and tested according to ASTM D 638 standard. Taguchi L9 orthogonal array is used to design the experiments. Findings The results imply that the orientation of fibers exhibited high significance with a p-value of 0.001 for the upgrade of strength. NC percentage and the volume of fiber have a low effect as the p-values obtained were 0.375 and 0.294. Confirmation tests were performed at the optimal levels of parameters and the outcomes were in the permissible range of the anticipated values of S/N ratio and mean tensile strength. The negligible effect of nanoclay is due to the lack of infusion of resin into the d-spacing of clay layers due to the low configuration settings of mixing conditions which was confirmed by XRD studies. The negligible effect of glass fiber volume is due to the void content and lack of stress transfer between fibers uniformly due to the void content and improper mixing of nanoclay. Research limitations/implications The limitation of this study is that a low-speed mechanical stirrer was used to mix NC in the epoxy and the mixture was not subjected to vacuum and ultrasonication for degassing and deagglomeration. Practical implications These composites can be used as substitute materials in place of metallic parts in the aerospace and automobile sector. These composites can be used in civil structures instead of steel and concrete, which have low strength-to-weight ratio and where the requirement of strength is in the range of 60 to 390 MPa. Social implications The composites can be used in a variety of applications, for example, structural works, automotive panels and low-cost housing. Originality/value This research gives an idea about the combined contribution of NC, Vgf and “θ” to the improvement of tensile strength of the glass-epoxy composite.
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Dissertations / Theses on the topic "VGF method"

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Ziegenbalg, Stefan. "Kontrolle freier Ränder bei der Erstarrung von Kristallschmelzen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1212521184972-55836.

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Bei der Kristallzüchtung insbesondere von Halbleitern hat die Form des freien Randes (dem Interface zwischen fester und flüssiger Phase) einen starken Einfluss auf die Qualität des Kristalls. Die Dissertation befasst sich mit der Optimalsteuerung der Form und des Verlaufs des freien Randes. Als Vorlage für die in der Arbeit betrachteten Modellkonfigurationen dient das VGF-Verfahren (Vertical Gradient Freeze). Der Erstarrungsprozess wird durch ein Zweiphasen-Stefan-Problem mit durch Konvektion und Lorentzkräfte getriebener Strömung beschrieben. Der freie Rand wird als Graph formuliert. Das Kontrollziel besteht in der Ansteuerung eines gewünschten Verlaufs des freien Randes. Als Kontrollgrößen dient die Temperatur auf der Wand des Schmelztiegels und/oder wandnahe oder verteilte Lorentzkräfte. Das Kontrollziel wird durch Minimierung eines geeigneten Kosten-Funktionals erreicht. Das daraus resultierende Minimierungsproblem wird mit einem Adjungierten-Ansatz gelöst. Anhand numerischer Experimente mit Aluminium und Gallium-Arsenid Schmelzen wird gezeigt, das das vorgestellte Verfahren gut funktioniert.
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Ziegenbalg, Stefan. "Kontrolle freier Ränder bei der Erstarrung von Kristallschmelzen." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A23697.

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Bei der Kristallzüchtung insbesondere von Halbleitern hat die Form des freien Randes (dem Interface zwischen fester und flüssiger Phase) einen starken Einfluss auf die Qualität des Kristalls. Die Dissertation befasst sich mit der Optimalsteuerung der Form und des Verlaufs des freien Randes. Als Vorlage für die in der Arbeit betrachteten Modellkonfigurationen dient das VGF-Verfahren (Vertical Gradient Freeze). Der Erstarrungsprozess wird durch ein Zweiphasen-Stefan-Problem mit durch Konvektion und Lorentzkräfte getriebener Strömung beschrieben. Der freie Rand wird als Graph formuliert. Das Kontrollziel besteht in der Ansteuerung eines gewünschten Verlaufs des freien Randes. Als Kontrollgrößen dient die Temperatur auf der Wand des Schmelztiegels und/oder wandnahe oder verteilte Lorentzkräfte. Das Kontrollziel wird durch Minimierung eines geeigneten Kosten-Funktionals erreicht. Das daraus resultierende Minimierungsproblem wird mit einem Adjungierten-Ansatz gelöst. Anhand numerischer Experimente mit Aluminium und Gallium-Arsenid Schmelzen wird gezeigt, das das vorgestellte Verfahren gut funktioniert.
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Wiesner, Jiří. "Návrh vf měřiče impedance." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221235.

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The first part deals with the basic methods for measuring an unknown impedance. After determining the parameters of the desired impedance analyzer method was chosen AC unbalanced Wheatstone bridge. As a source of harmonic signal has been selected direct digital synthesis circuit and measure provides the analog vector voltmeter. Subsequently, it is discussed the issue of determining the sign of the unknown phase impedance. The thesis describes the wiring of circuit AD8302 and circuit AD9958 direct digital synthesis for which it is also an example of the code. It discusses the design and simulation of a reconstruction filter. Finally there are the measured output voltage and spectrum synthesizer.
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Johnson, Kyle Matthew. "A numerical model for VHF meteor radars." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1453526.

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Cervera, Manuel A. "Meteor observations with a narrow beam VHF radar /." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phc419.pdf.

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Thesis (Ph. D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 1996.
Copies of author's previously published articles are inserted between p. 272-283 and are not numbered as part of main text. Includes bibliographical references (p. 283-293).
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Malan, Leon. "Direct numerical simulation of free-surface and interfacial flow using the VOF method : cavitating bubble clouds and phase change." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066555/document.

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La présente étude se fonde sur la méthode du volume de fluide (en anglais VOF pour Volume-of-Fluid), proposée à l'origine par Hirt et Nicols. L'objectif de la première partie de ce travail est l'étude hydrodynamique de la cavitation isotherme dans les grands nuages de bulles. Cette étude s'inscrit plus généralement dans un large effort de recherche en micro--écaillage mené par le CEA. Une méthode capable de traiter la présence de cavités de vapeur de volume variable ou encore de pores a été formulée et implémentée dans un code existant, PARIS. L'écoulement est idéalisé en supposant un liquide parfait, des effets thermiques négligeables et une pression de vapeur nulle. Une étude innovante est présentée, traitant de l'interaction du nuage de bulles dans un liquide en expansion par simulation numérique directe. Les résultats des simulations révèlent l'existence d'un concours de cavités dans un certain régime caractérisé par le nombre de Weber.Dans la deuxième partie de l'étude, le système d'équations à résoudre est modifié et généralisé afin de décrire l'écoulement incompressible d'un fluide diphasique tout en incluant la possibilité d'un changement de phase à l'interface. Une nouvelle méthode VOF est proposée, dans laquelle une nouvelle technique d'advection de la fonction VOF permet de traiter à la fois la conservation de la masse et de l'énergie sous une forme conservative. Les expériences numériques démontrent la précision, la robustesse et la généralité de la méthode proposée, et témoignent d'un développement fondamental important pour l'application des méthodes VOF à la modélisation des changements de phase
Direct numerical simulation of two-phase ow is used extensively for engineering research and fundamental fluid physics studies [54, 81]. This study is based on the Volume-Of-Fluid (VOF) method, originally created by Hirt and Nicols [30]. This method has gained increased popularity, especially when geometric advection techniques are used coupled with a planar reconstruction of the interface [14, 89]. The focus of the first part of this work is to investigate the hydrodynamics of isothermal cavitation in large bubble clouds, which originated from a larger study of micro-spalling [61], conducted by the French CEA. A method to deal with volume-changing vapour cavities, or pores, was formulated and implemented in an existing code, PARIS . The ow is idealized by assuming an inviscid liquid, negligible thermal effects and vanishing vapour pressure. A novel investigation of bubble cloud interaction in an expanding liquid using direct or detailed numerical simulation is presented. The simulation results reveal a pore competition, which is characterised by the Weber number in the ow. In the second part of the study the governing equations are extended to describe incompressible ow with phase change [79]. The description of the work commences with the derivation of the governing equations. Following this, a novel, geometric based, VOF solution method is proposed. In this method a novel way of advecting the VOF function is invented, which treats both mass and energy conservation in conservative form. New techniques include the advection of the interface in a discontinuous velocity field. The proposed algorithms are consistent and elegant, requiring minimal modifications to the existing code. Numerical experiments demonstrate accuracy, robustness and generality. This is viewed as a significant fundamental development in the use of VOF methods to model phase change
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Maini, Deepak. "VOF Based Multiphase Lattice Boltzmann Method Using Explicit Kinematic Boundary Conditons at the Interface." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16240.

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A VOF based multiphase Lattice Boltzmann method that explicitly prescribes kinematic boundary conditions at the interface is developed. The advantage of the method is the direct control over the surface tension value. The details of the numerical method are presented. The Saffman instability, Taylor instability, and flow of deformable suspensions in a channel are used as example-problems to demonstrate the accuracy of the method. The method allows for relatively large viscosity and density ratios.
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Arun, V. "The solution of variable-geometry truss problems using new homotopy continuation methods." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-09162005-115035/.

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Beldon, Charlotte. "VHF radar studies of mesosphere and thermosphere." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512294.

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Dagson, Josef, and Källström Samuel Nissilä. "Air Leakage Diagnosis in Heavy Duty Truck Engines with EGR and VGT." Thesis, Linköpings universitet, Fordonssystem, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-88183.

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Scania CV AB is a leading company within development and production of buses, trucks as well as industrial and marine engines. New environmental and safety legislations continuously demand higher quality from the products. An upcoming European legislation, Euro 6, implies that gas leakages from truck engines should be detected while driving. If the source of the leakage is not only detected, but also isolated, that is separated from other faults, the adjustments in the workshop goes faster since there is no need for leakage localisation. A faster reparation increases the up-time, i.e. the amount of time that the truck can be used. This master thesis work uses current methods developed at Scania for residual generation to perform model-based leakage diagnosis. In this work, measurements are gathered for dierent sensor faults and two leakages. The measurements are used to evaluate the actual performance of the resulting diagnosis system. The result, based on the residuals generated by the method, shows that leakages on the boost-side and the exhaust-side can be detected, and isolated from faults in the pressure sensors on the boost-side and the exhaust-side. The isolation of these four faults is considered the hardest to achieve among sensor faults and leakages why the full isolation performance is promising. Further measurements are needed to determine the full isolation performance of the diagnosis system. The resulting system is reasoned to be suitable for execution in real time on-board the truck.
Scania CV AB är en ledande koncern inom utveckling och produktion av bussar, lastbilar samt industri- och marinmotorer. Nya lagkrav för miljö och säkerhet ställer ständigt högre krav på de tillverkade produkterna. Ett nära förestående lagkrav för lastbilar, Euro 6, innebär att gasläckage från motorn ska detekteras under körning. Om läckaget förutom att detekteras också kan isoleras, det vill säga särskiljas från andra fel, går reparationen i verkstaden snabbare då man slipper lokalisera läckaget. En snabbare reparation ökar up-time, det vill säga tiden som lastbilen kan användas på åkeriet. I detta exjobb används befintliga metoder för residualgenerering framtagna på Scania för att åstadkomma modelbaserad läckagediagnos. Arbetet tar även fram mätdata för olika givarfel samt för två läckage i motorn. Denna mätdata används för att utvärdera det erhållna diagnossystemets faktiska prestanda. Resultatet, som bygger på residualerna som metoden genererat, visar att läckage går att detektera, och att läckagen går att isolera från fel på tryckgivarsensorer på laddluftssidan och avgassidan. Denna isolering anses vara den svåraste att uppnå av alla sensorfel samt läckage varvid övrig isoleringsprestande verkar lovande. Däremot behövs mer mätdata för att säkert kunna fastställa övrig isoleringsprestanda. Diagnosmetoden lämpar sig troligen för exekvering i realtid ombord på lastbilen.
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Books on the topic "VGF method"

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Feil, Naomi. VF validation: The Feil method : how to help disorientedold-old. 2nd ed. Cleveland, Ohio: Edward Feil Productions, 1988.

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Feil, Naomi. VF validation: The Feil method : how to help disoriented old-old. Cleveland, Ohio: Edward Feil Productions, 1989.

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Atomization simulations using an Eulerian-VOF-Lagrangian method. [Washington, DC: National Aeronautics and Space Administration, 1994.

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Atomization simulations using an Eulerian-VOF-Lagrangian method. [Washington, DC: National Aeronautics and Space Administration, 1994.

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Yen-Sen, Chen, and United States. National Aeronautics and Space Administration., eds. Numerical modeling of spray combustion with an advanced VOF method. [Washington, D.C: National Aeronautics and Space Administration, 1997.

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Center, Langley Research, ed. The NASA Digital VGH Program, exploration of methods and final results. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1989.

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Mills, M. G. L., and M. E. J. Mills. Introduction. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198712145.003.0001.

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Most cheetah studies have been confined to mesic savannahs, yet much of its distribution range covers arid systems. The prime objective in this study was to examine the species’ adaptations to an arid region, to compare the results with those from other cheetah studies, especially from the Serengeti, and to analyse the data within the framework of carnivore population and behavioural ecology. The study was conducted in the Kgalagadi Transfrontier Park South Africa/Botswana, an area receiving 180–250 mm rainfall per year. Tracking spoor with the help of Bushmen trackers and continuous follows of 21 VHF radio-collared cheetahs were the main study methods used. These were supported by photographic records for individual identification, DNA studies for genetic aspects including paternity, and the use of doubly labelled water and the fitting of miniature data loggers for energetic studies. The statistical tests used to analyse the data are described.
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30 лет программе «Байкал-бурение». Академическое изд-во «Гео», 2020. http://dx.doi.org/10.21782/b978-5-6043022-3-1.

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The book is devoted to the International Baikal Drilling Project, a part of the program «Global changes of the environment and climate», accomplished by the Russian, American and Japanese scientists. Much attention is given to the fact that the Baikal Drilling team acted as a single, solid team. The major results obtained from those studies were described in numerous publications published in various Russian and International journals. We hope that the book will be interesting for young scientists, so that they can feel an interest in studying the secrets of nature. The project was accomplished owing to the efforts of M.I. Kuzmin, V.S. Antipin, A.V. Goreglyad, V.F. Geletyi, G.V. Kalmychkov (Institute of Geochemistry, SB RAS), M.A Grachev, O.M. Khlystov (Limnological Institute, SB RAS). Many problems that arouse in the project management were solved with the assistance of V.A. Fialkov, Director of the Baikal Museum, SB RAS, A.A. Bukharov, Vive-Director of the Baikal Museum, and the translators T. V. Bunaeva and M. Yu. Khomutova. The book not only describes a difficult work in the ice of Lake Baikal, but also presents the valuable data on the mineral composition of the bottom sediments, the discovery of Baikal gas hydrates, and the evolution of the landscapes and climate of the Baikal region in the Late Cenozoic. Modern methods of electron-probe x-ray spectral microanalysis and isotope geochemistry are described in detail. All this, as well as the methods of modeling real mineral associations, make this book valuable for researchers in different fields of science.
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Lutsenko, V. I., I. V. Lutsenko, D. O. Popov, and I. V. Popov. Remote sensing of the environment using the radiation of existing ground and space radio systems. PH “Akademperiodyka”, 2020. http://dx.doi.org/10.15407/akademperiodyka.429.345.

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Possibilities of using existing ground (TV centers, broadcasting stations) and space (global navigation satellite systems) radio systems for solving the problem of remote sensing and monitoring of the environment and objects in it are considered. The methods of diagnostics of the troposphere, description of the refractive index with the use of semi-Markov processes and atomic functions of Kravchenko-Rvacheva are proposed. The seasonal and altitudinal dependencies of radio-meteorological parameters and radio-climatic features of Ukraine were studied. Technologies for determining the effective gradient of the refractive index by damping factor of the VHF signals of television centers on the OTH routes in the zone of the near geometric shadow, on the angles of radioa "rise" and "sets" of the AES, detection of precipitation zones by the fluctuations of the pseudoranges and changes of the coordinates estimates, parameters of the surface of the earth by the fluctuations of the GNSS signals. Reviewers: Head of the Department of Radio waves propagation in the natural environments of the O. Ya. Usikov Institute for Radiophysics and Electronics NASU, Doctor of Physical and Mathematical Sciences, Professor Kivva F.V., Professor of the Department of Designing Radioelectronic Devices of Aircraft of the National Aerospace University. M.E. Zhukovsky (KhAI), Doctor of Technical Sciences, Professor Volosyuk V.K.
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Book chapters on the topic "VGF method"

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Vinogradov, Dmitry V. "VKF-Method of Hypotheses Generation." In Communications in Computer and Information Science, 237–48. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-12580-0_25.

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Belz, Malte. "Methode." In Die Phonetik von äh und ähm, 73–112. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-62812-6_4.

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ZusammenfassungFür diese Arbeit kombiniere ich phonetische und korpuslinguistische Methoden, indem akustische Messwerte an den von meinen Annotationen ausgezeichneten Stellen aus dem Audiosignal extrahiert und weiter analysiert werden. Zusätzlich definiere ich Annotationswerte, die das akustische Signal beschreiben und in die Analyse einfließen. Dies geht über die ‚klassische‘ Korpusauswertung „gesprochener Korpora“ (Wichmann 2008) hinaus, die sich zwar auf Transkripte von Sprachaufnahmen bezieht (vgl. Kübler & Zinsmeister 2015: 4), aber die in ihnen enthalten „sound patterns“ außen vor lässt (Wichmann 2008: 189).
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Shi, Zhan, Ying Zeng, and Zanhong Wu. "VNF Deployment Method Based on Multipath Transmission." In Proceedings of the 9th International Conference on Computer Engineering and Networks, 867–74. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3753-0_84.

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Câmara, Jean Henrique de Sousa, Jugurta Lisboa-Filho, Wagner Dias de Souza, and Rafael Oliveira Pereira. "Quality Attributes and Methods for VGI." In Computational Science and Its Applications -- ICCSA 2016, 306–21. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42111-7_24.

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Andrew, Amy, and Klaus Strebel. "HIV-1 Accessory Proteins: Vpu and Vif." In Methods in Molecular Biology, 135–58. Totowa, NJ: Humana Press, 2014. http://dx.doi.org/10.1007/978-1-62703-670-2_12.

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Evans, Ian. "An Overview of VEGF-Mediated Signal Transduction." In Methods in Molecular Biology, 91–120. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2917-7_7.

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Guyot, Mélanie, and Gilles Pagès. "VEGF Splicing and the Role of VEGF Splice Variants: From Physiological-Pathological Conditions to Specific Pre-mRNA Splicing." In Methods in Molecular Biology, 3–23. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2917-7_1.

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Weis, Sara M. "Evaluation of VEGF-Induced Vascular Permeability in Mice." In Methods in Molecular Biology, 403–15. Totowa, NJ: Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-191-8_27.

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Pellet-Many, Caroline. "Chemotactic Migration of Endothelial Cells Towards VEGF-A165." In Methods in Molecular Biology, 151–57. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2917-7_11.

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Vernes, Jean-Michel, and Y. Gloria Meng. "Detection and Quantification of VEGF Isoforms by ELISA." In Methods in Molecular Biology, 25–37. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2917-7_2.

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Conference papers on the topic "VGF method"

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Schwesig, P., U. Sahr, J. Friedrich, G. Muller, A. Kohler, U. Kretzer, S. Eichler, and A. Muhe. "Growth and characterization of 2" and 4" low EPD InP substrate crystals by the vertical gradient freeze (VGF)-method." In 2005 International Conference on Indium Phosphate And Related Materials. IEEE, 2005. http://dx.doi.org/10.1109/iciprm.2005.1517510.

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Kim, Sang Il, and Hwa Sung Kim. "A VNF Placement Method based on VNF Characteristics." In 2021 International Conference on Information Networking (ICOIN). IEEE, 2021. http://dx.doi.org/10.1109/icoin50884.2021.9334022.

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Amini, N. "Pipes Detection Using VLF Method." In Near Surface 2005 - 11th European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.13.p026.

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Park, Chan-Ho, and Dong-Ryeol Shin. "VNF management method using VNF Group Table in Network Function Virtualization." In 2017 19th International Conference on Advanced Communication Technology (ICACT). IEEE, 2017. http://dx.doi.org/10.23919/icact.2017.7890085.

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Smaliukienė, Rasa, and Dominykas Kregždė. "FACTORS INFLUENCING POSITIVE CUSTOMER EXPERIENCES ONLINE." In 23rd Conference for Young Researchers "Economics and Management". Vilnius Gediminas Technical University, 2020. http://dx.doi.org/10.3846/vvf.2020.011.

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The main purpose of this article is to identify factors and measure their influence on creation of positive customer experiences online. Methods that are used in this article are literature analysis for factor identification and Analytic Hierarchy Process, Kendall coefficient of expert competence and TOPSIS method to assess the influence that identified factors have on creation of positive customer experience online. For the conducted research, two groups of respondents were used. One group consisted of experts from fields related to the topic of this article and another was a group of target audience who responded to given questions. Research revealed how each factor influences creation of positive customer experiences online. In addition to this, companies from a similar business field were ranked using TOPSIS method based on how each factor affects each company.
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Li, Guangming, Xiaolei Sun, and Guangyou Cai. "Research of VLF communication frequency optimizing method." In 2012 10th International Symposium on Antennas, Propagation & EM Theory (ISAPE - 2012). IEEE, 2012. http://dx.doi.org/10.1109/isape.2012.6408804.

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Wu, L. L., M. Huang, B. Chen, Jiachun Li, and Song Fu. "An Adaptive VOF Method on Unstructured Grid." In RECENT PROGRESSES IN FLUID DYNAMICS RESEARCH: Proceeding of the Sixth International Conference on Fluid Mechanics. AIP, 2011. http://dx.doi.org/10.1063/1.3652001.

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Dong, Zulong, Badih Jawad, Liping Liu, and Hossam Metwally. "Controlling Drag and Down Forces on a Vehicle Side-View Mirror by Applying Vortex Generator Designs on the Bottom Surface." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23320.

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Abstract Side-view mirrors impact the aerodynamic performance of a vehicle due to the creation of extra drag force, noise, and vibration. This paper presents an alternative practical solution for improving aerodynamic performance of vehicle side-view mirrors. A CFD analysis is conducted for studying the airflow around a side-view mirror with different types of passive vortex generators (VGs) mounted on the bottom surface. VGs are small wingtips that are used to produce swirling motion in the flow stream. In recent years, VGs have been used in vehicle underbody diffusers to delay flow separation and to increase the flow control surface. This study aims to understand the effect of underbody VGs on the flow mechanisms downstream of the side-view mirror, and its impact on both drag and down forces. The turbulent flow behind the side-view mirror is investigated to determine the effects of different VG types and attack angles. Four types of VGs are considered in this work. Changes are made to the baseline model by either adding the VGs close to the frontal edge of the bottom surface of the mirror which aims to control the flow separation, or adding the VGs close to the back edge which aims to reduce the shedding area. Computational Fluid Dynamics (CFD) analysis using ANSYS Fluent is conducted to simulate the flow behavior by using three dimensional Reynolds-averaged Navier-Stokes method with standard K-epsilon (K-ε) turbulence model. In order to incorporate the effect of vehicle body, each model is assembled on a quad-vehicle bluff body for analysis. The drag and down forces are numerically solved and compared with the results of the baseline model at the speeds of 15, 40, 60 and 80 miles per hour. It is concluded from the CFD analysis that: (1) Mounting VGs at the bottom surface of a side-view mirror reduces down force in most cases. (2) Setting underbody VGs at either the front or back edge of the mirror bottom surface has a slight effect on reducing drag force. (3) Multiple types of VGs show improved results with a 30 degree attack angle, which encourages future studies of VG applications with large attack angles.
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Couderc, Frederic, and Jean-Luc Estivalezes. "Sharp Interface Capturing Methods Based on Level-Set Method for Incompressible Flow With Surface Tension." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45151.

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In this paper, we present the development of a code for two-phase incompressible flow simulation with interface. Interface between non miscible fluid is captured by a level-set method. However, unlike classical approachs, jump conditions throught the interface are explicitely taken into account without any smoothing. Different tests cases are then simulated and show drastic improvement compared to existing methods like VOF or others.
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Xu Ling-jun, Chen Gang, Shao Jian-bin, and Xue Yang. "Numerical simulation Of bubble behavior using VOF method." In 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5774305.

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Reports on the topic "VGF method"

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Yao, J. A Localized Accurate VOF Interface Reconstruction Method with Curvature and Corner Definition in Two Dimensions. Office of Scientific and Technical Information (OSTI), January 2020. http://dx.doi.org/10.2172/1592985.

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Lamontagne, Robert A. Cleaning Method for VLF Cooling Water System Development and History of Application With Step-by-Step Procedure. Fort Belvoir, VA: Defense Technical Information Center, June 2000. http://dx.doi.org/10.21236/ada379246.

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JODEIRI, Behshad, Ali MORADZADEH, Faramarz DOULATI ARDEJANI, and Hamid Reza RAMAZI. Investigation of Pollutions Resulted from Acid Mine Drainage Using VLF and Geo-Electrical Methods - A Case Study. Cogeo@oeaw-giscience, September 2011. http://dx.doi.org/10.5242/iamg.2011.0291.

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