Academic literature on the topic 'Kurucz models'
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Journal articles on the topic "Kurucz models"
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Castelli, Fiorella, and Robert L. Kurucz. "Models for Vega." International Astronomical Union Colloquium 138 (1993): 496–501. http://dx.doi.org/10.1017/s0252921100020959.
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AbstractBy using the ATLAS9 code which requires the new opacity data from Kurucz (1992), we derived a new atmospheric model for Vega with parameters Teff=9500 K, log g=3.95, [M/H]=−0.5, ξ=2 kms s−1. The model was fixed by comparing observed and computed energy distributions and Balmer profiles.
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Kurucz, Robert L. "Computation of Opacities for Diatomic Molecules." International Astronomical Union Colloquium 146 (1994): 282–95. http://dx.doi.org/10.1017/s0252921100021400.
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In this section I briefly describe my efforts to improve the atomic and molecular line data. This work is described in more detail in Kurucz (1992a). In subsequent sections I briefly describe three methods for computing opacity and the models and spectra that result from using them.My model calculations in the 1970s used the distribution-function line opacity computed by Kurucz (1979a,b) from the line data of Kurucz & Peytremann (1975). We had computedgfvalues for 1.7 million atomic lines for sequences up through nickel using scaled-Thomas-Fermi-Dirac wavefunctions and eigenvectors determined from least squares Slater parameter fits to the observed energy levels. We also collected all published data ong fvalues and included them in the line list whenever they appeared to be more reliable than the computed data (that work is ongoing, but I am running behind).
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Cugier, H. "Asteroseismology with the new opacity bump at log T ≈ 5.06." Proceedings of the International Astronomical Union 9, S301 (August 2013): 401–2. http://dx.doi.org/10.1017/s1743921313014750.
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AbstractAlthough the κ mechanism of pulsations is known for early-type stars, opacities and the equation of state are still uncertain. Stellar models calculated for the OP data implemented with the new Kurucz opacities at log T < 5.2 were investigated for different chemical compositions of elements. The additional metallic opacity bump at log T ≈ 5.06 that occurs in the Kurucz data changes markedly the oscillation spectra of unstable modes. Basic properties of the new opacity bump and examples of seismic models are shown. B-type stars observed in the Galaxy, LMC and SMC were considered. The problem was studied using Dziembowski's computing codes for linear, non-adiabatic and non-radial oscillations.
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Morel, P., C. Van’t Veer, G. Berthomieu, R. Cayrel, F. Castelli, M. J. Goupil, Y. Lebreton, and J. Provost. "Restoration of the Atmosphere in Solar Models." International Astronomical Union Colloquium 137 (1993): 57–59. http://dx.doi.org/10.1017/s0252921100017449.
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AbstractFrom models of the Sun atmosphere obtained with ATLAS 9 (Kurucz 1992) it appears that the diffusion limit of the transfer equation becomes valid only at depths larger than TR ~ 10. Even with physics as consistent as possible one restores the atmosphere with an accuracy not better than ~ 40%, but with small consequences on solar calibrated models. Despite the eigenmodes have turning points located in the atmosphere, the study of the oscillations reveals differences less than 2μHz when the atmosphere is restored with various assumptions.
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Kurucz, Robert L. "Synthetic Template Spectra." Highlights of Astronomy 10 (1995): 407–10. http://dx.doi.org/10.1017/s1539299600011552.
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I will compute representative spectra for all spectral types for which my model calculations (Kurucz 1992; 1993a; 1994a) are valid. High-resolution zero-rotation fluxes and intensities will be distributed on CD-ROMS together with programs (Kurucz 1993B) for broadening the spectra to arbitrary rotation velocities, macroturbulent velocities, and instrumental profiles, and for transmitting the spectrum through an atmosphere.Since the line data are still not well determined, I actually have to make two calculations, one with only the lines with good wavelengths to preserve wavelength detail, and one with all lines, including predicted, to preserve the energy distribution for photometric calibration. In the first case the spectrum is usable as a radial velocity, abundance, or classification template. Even though the line list is incomplete, its signal-to-noise can be higher than that of observed spectra for cross-correlating.The models are plane parallel, LTE, in hydrostatic equilibrium, and have no triatomic opacities. Therefore, M stars and supergiants cannot be computed realisticly. The abundances available now are scaled-solar and alpha-enhanced scaled-solar. Individual abundances can be changed for the spectrum calculation. My new model atmosphere program, ATLAS 12 (Kurucz 1993c), which does not yet work, will allow arbitrary abundances.I have made test calculations for Arcturus, the sun, Vega, Sirius, and a17000K B. star. Figure 1 shows the effect of resolution on the appearance of the spectrum. Figure 2 shows the effect of rotation. The spectrum for Arcturus is displayed in Kurucz (1994b) with the molecular bands labelled.
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Evans, Nancy Remage, Terry J. Teays, Lyla L. Taylor, John B. Lester, and Robert B. Hindsley. "The Temperature of the Supergiant α Per." International Astronomical Union Colloquium 155 (1995): 393–94. http://dx.doi.org/10.1017/s0252921100037660.
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AbstractWe compare observed fluxes from the ultraviolet (IUE) through J and K with recent Kurucz model atmospheres to determine a temperature for the F5 lb supergiant α Per. The two most important advances in this study as compared with previous work are the use of well calibrated ultraviolet fluxes and the use of models with an appropriate microturbulence.
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Gulati, R. K., and M. Chavez. "Synthesis of Lick Spectral Indices With Overshooting and No-Overshooting Model Atmospheres." Symposium - International Astronomical Union 192 (1999): 356–62. http://dx.doi.org/10.1017/s007418090020435x.
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Using Lester's version of the Kurucz codes, we have computed a set of models with and without “approximate overshooting”. Based on the new models, we have synthesized the spectra in the wavelength range 4800–5400 Å in order to investigate the role of overshooting and no-overshooting models on the Lick indices. Preliminary results show that the differences between the indices are significant in the case of Hβ and Mgb. We need to investigate further the importance of this convection parameter, by comparing model spectra with observed spectra.
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Peters, Geraldine J., and Ronald S. Polidan. "A New Analysis of the Abundance Standards ι Herculis and τ Scorpii." Symposium - International Astronomical Union 111 (1985): 417–21. http://dx.doi.org/10.1017/s0074180900079110.
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Recent continuum and line data in the far ultraviolet for ι Her (B3IV) and τ Sco (BOV) have been combined with published observations in the near uv and visible spectral regions and interpreted with the aid of the Kurucz (1979) line-blanketed model atmospheres. For ι Her and τ Sco, respectively, interpolated models of (Teff/log g) 17500±500K/3.75±0.15, and 31500±1500K/4.3±0.2 fit the observed continua from 900–6500Å and the profiles of Hγ and Hδ. Adopting these models, solar abundances are suggested for both stars.
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Meléndez, J., L. Casagrande, I. Ramírez, and M. Asplund. "Precise Li abundances in metal-poor stars: depletion in the Spite plateau." Proceedings of the International Astronomical Union 5, S265 (August 2009): 71–72. http://dx.doi.org/10.1017/s1743921310000220.
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AbstractWe present Li abundances for 73 stars in the metallicity range −3.5 < [Fe/H] < −1.0 using improved IRFM temperatures (Casagrande et al. 2009) with precise E(B-V) values obtained mostly from interstellar NaI D lines, and high-quality equivalent widths (σEW ~ 3%). At all metallicities we uncover a fine-structure in the Li abundances of Spite plateau stars, which we trace to Li depletion that depends on both metallicity and mass. Models including atomic diffusion and turbulent mixing seem to reproduce the observed Li depletion assuming a primordial Li abundance ALi = 2.64 dex (MARCS models) or 2.72 (Kurucz overshooting models), in good agreement with current predictions (ALi = 2.72) from standard BBN.
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Moya, A., R. Garrido, and M. A. Dupret. "Nonadiabatic observables in main sequence δ Scuti stars." International Astronomical Union Colloquium 193 (2004): 271–74. http://dx.doi.org/10.1017/s0252921100010770.
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AbstractUsing a theoretical nonadiabatic pulsation model, phase differences and amplitude ratios between the relative effective temperature variation and the relative radial displacement have been calculated. These quantities, when compared with photometric observations in different colours, provide an efficient instrument for mode identification, the first step to understand the internal structure of the stars. The theoretical results presented in this paper show a dependence for δ Scuti stars on the mixing length parameter α used to treat the convection using the standard Mixing Length Theory. The nonadiabatic pulsational code developed here includes the pulsation-atmosphere interaction as described by Dupret et al. (2002). The equilibrium models are provided by the CESAM evolutionary code, where a complete reconstruction of non-grey atmospheres (Kurucz models) is included.
Dissertations / Theses on the topic "Kurucz models"
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Ekanayake, Gemunu. "Determination of Stellar Parameters through the Use of All Available Flux Data and Model Spectral Energy Distributions." UKnowledge, 2017. http://uknowledge.uky.edu/physastron_etds/44.
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Basic stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity plays a vital role in the characterization of various stellar populations in the Milky Way. The Stellar parameters can be measured by adopting one or more observational techniques, such as spectroscopy, photometry, interferometry, etc. Finding new and innovative ways to combine these observational data to derive reliable stellar parameters and to use them to characterize some of the stellar populations in our galaxy is the main goal of this thesis.
Our initial work, based on the spectroscopic and photometric data available in literature, had the objective of calibrating the stellar parameters from a range of available flux observations from far-UV to far-IR. Much effort has been made to estimate probability distributions of the stellar parameters using Bayesian inference, rather than point estimates.
We applied these techniques to blue straggler stars (BSSs) in the galactic field, which are thought to be a product of mass transfer mechanism associated with binary stars. Using photometry available in SDSS and GALEX surveys we identified 85 stars with UV excess in their spectral energy distribution (SED) : indication of a hot white dwarf companion to BSS. To determine the parameter distributions (mass, temperature and age) of the WD companions, we developed algorithms that could fit binary model atmospheres to the observed SED. The WD mass distribution peaks at 0.4M , suggests the primary formation channel of field BSSs is Case-B mass transfer, i.e. when the donor star is in red giant phase of its evolution. Based on stellar evolutionary models, we estimate the lower limit of binary mass transfer efficiency β ~ 0.5.
Next, we have focused on the Canis Major overdensity (CMO), a substructure located at low galactic latitude in the Milky Way, where the interstellar reddening (E(B-V )) due to dust is significantly high. In this study we estimated the reddening, metallicity distribution and kinematics of the CMO using a sample of red clump (RC) stars. The averageE(B-V)(~0.19)is consistent with that measured from Schlegel maps (Schlegal et.al. 1998). The overall metallicity and kinematic distribution is in agreement with the previous estimates of the disk stars. But the measured mean alpha element abundance is relatively larger with respect to the expected value for disk stars.
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Vrubel, Tomáš. "Vybrané modely determinace měnového kurzu." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-75895.
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The aim of this Master Thesis is to summarize the modern theoretical models of fundamental determination of exchange rates. The Thesis contains of Introduction, four explanatory chapters and the conclusion. The first chapter provides the definition of traditional premises (PPP, IRP, expectations) and in the end of the chapter the 5-equation model is introduced. The second chapter focuses the attention on both equilibrium (Bilson-Frenkel) and non equilibrium (Dornbusch, Frankel) monetary models. In the end of the chapter there are also briefly mentioned Hooper-Morton's and Girton-Ropers models. The third chapter brings in the risk and it is focused on portfolio models. The last chapter describes the Lyons-Evans model of market microstructure based on order flow.
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Silber, Marek. "Vytvoření podpůrných výukových prostředků pro kurz Moderní počítačová grafika." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220541.
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This thesis is divided into two parts, where the first part is focused on an overview and work with 3D software at Czech universities, it includes a comparison of the different programs and description of history of Blender programme which was the one chosen as support for teaching the Modern computer graphics course. The second part of the thesis is more focused on practical matters and describes the basic workings of the programme from the first start up, orientation in the different sections and the settings of the work space for the work itself. The thesis details basic transformation commands of change of location, rotation and change of scale of objects and editing commands like copying, deleting, hiding and duplication of individual objects including their theoretical descriptions. Work with lightings continues after the transformation commands including practical examples of different types of lighting. Work with materials and textures is described in the last two chapters. The goal of this thesis is to describe how to work with the Blender programme and basic work with objects and assigning individual materials and textures for objects and the lighting in a scene for people unfamiliar with the programme.
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Weichetová, Lenka. "Does 'News' Approach Outperform Monetary Model in Exchange Rate Determination?" Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-199745.
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This thesis aims to contribute in the field of exchange rate determination. Firstly, it sums results of previous studies (theoretical as well as empirical ones). Consequently, it investigates two approaches to exchange rate determination, and compares their theoretical and empirical performance. Firstly, monetary model is introduced, and secondly 'news' model is presented. Since 'news' model incorporates rational expectations and considers interest rate endogenous, it is expected to give better results in comparison with monetary model. Six exchange rates were chosen for the empirical analysis. They are analyzed in period July 2000 -- June 2012. As expected, 'news' model outperforms monetary model. However, since the volatility of exchange rate is much bigger in reality than both of the models are able to explain, neither of the models can be considered as satisfactory. It is the same result which has been presented in older studies that investigated these models.
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Dror, Marika. "Forecasting of exchange rates." Doctoral thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-202335.
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The thesis investigates different exchange rate models and their forecasting performance. The work takes previous literature overview and summarize their findings. Despite the significant amount of papers which were done on the topic of exchange rate forecast, basically none of them cannot find an appropriate model which would outperform a forecast of a simple random walk in every horizon or for any currency pair. However, there are some positive findings in specific cases (e.g. for specific pair or for specific time horizon). The study provides up-to-date analysis of four exchange rates (USD/CZK, USD/ILS, USD/GBP and USD/EUR) for the period of time from January 2000 to August 2013 and analyse forecasting performance of seven exchange rate models (uncovered interest rate parity model, purchasing power parity model, monetary model, monetary model with error correction, Taylor rule model, hidden Markov model and ESTAR model). Although, the results are in advantage of Taylor rule model, especially for the exchange rate of USD/CZK, I cannot prove that the forecasting performance is significantly better than the random walk model. Except of the overall analysis, the work suppose instabilities in the time. Stock and Watson (2003) found that the forecast predictability is not stable over time. As a consequence, the econometric model can give us better forecast than random walk process at some period of time, however at other period, the forecasting ability can be worse than random walk. Based on Fluctuation test of Giacomini and Rossi (2010a) every model is analysed how the out-of-sample forecast ability changes over time.
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Sommer, Josef. "Analýza predikční schopnosti vybraných fundamentálních modelů měnového kurzu na základě statistických metod." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-264299.
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This diploma thesis evaluates out-of-sample predictive ability of exchange rate models. The first part of the thesis summarizes existing empirical findings about exchange rate predictability and describes exchange rate models chosen to be evaluated. The second part of the thesis evaluates predictive ability of purchasing power parity, uncovered interest parity, monetary model and Taylor rule model. The exchange rate models are evaluated on CZK/EUR and CZK/USD currency pairs. The analysis is made using quarterly data from 1999 to 2013, while 2009 to 2013 period is reserved for forecast evaluation. The predictive ability of exchange rate models is evaluated in one quarter, one year and three years horizons. The exchange rate models are specified in first differences and estimated by ordinary least squares method. The forecasts are made using rolling regression. The exchange rate models are evaluated using RMSE, Theil's U, CW test and direction of change criterion. The diploma thesis concludes with description of own empirical findings.
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Hartmeyer, Simon [Verfasser], Wolfgang Akademischer Betreuer] Kurz, and Ekkehard [Akademischer Betreuer] [Fehling. "Ein Modell zur Beschreibung des Querkrafttragverhaltens von Stahlverbunddecken aus Leicht- und Normalbeton / Simon Hartmeyer. Betreuer: Wolfgang Kurz ; Ekkehard Fehling." Kaiserslautern : Technische Universität Kaiserslautern, 2014. http://d-nb.info/1059391139/34.
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Brabcová, Kateřina. "Model e-learningu pro e-commerce." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2011. http://www.nusl.cz/ntk/nusl-223130.
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The thesis summarizes the possible ways of using the Internet to implement e commerce within the meaning of trade in education. The work deals with the forms of computer-assisted teaching methods, summarizes the applicable software tools, web portals and educational applications, focusing on the creation and dissemination of study materials, and complete learning management systems.
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Raschke, Kristin. "Grundlagenuntersuchungen zur Prozess- und Struktursimulation von Phenolharzformmassen mit Kurz- und Langglasfaserverstärkung." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-229327.
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Thermisch und mechanisch hoch beanspruchte Bauteile im Automobil erfordern den Einsatz hochbeständiger Werkstoffe, bei gleichzeitig niedrigen Materialkosten und effizienter Verarbeitung. Rieselfähige Phenolharzformmassen zeichnen dabei eine Werkstoffklasse aus, die aufgrund ihres Eigenschaftsprofils neue Anwendungsbereiche für einen polymeren Werkstoffeinsatz ermöglichen können. Im Rahmen der vorliegenden Arbeit werden im Hinblick auf eine Bauteilentwicklung mithilfe der integrativen Simulation die Grundlagen einer ganzheitlichen Simulationskette der Prozess- und Struktursimulation von rieselfähigen Phenolharzen mit Kurz- und Langglasfaserverstärkung erarbeitet. Das auf Basis umfangreicher Prozessuntersuchungen abgeleitete Strömungsverhalten kann mithilfe des Block-/Scherströmungsmodells beschrieben werden. Die Ergebnisse der Mikrostrukturanalyse zeigen jedoch eine Orientierungsdynamik der Fasern, welche zum gegenwärtigen Zeitpunkt mithilfe der empirischen Modelle der klassischen Spritzgießsolver nicht abgebildet werden kann. Die mikromechanische Materialmodellierung erfolgt entsprechend an der experimentell ermittelten Mikrostruktur, welche die Berücksichtigung von Faserbündelungen und -krümmungen in der mechanischen Strukturanalyse erlaubt. Das abgeleitete elastoplastische Materialmodell wird zur Vorhersage des Ermüdungsverhaltens unter harmonischer und nichtharmonischer Schwingbeanspruchung um ein zyklisches Versagensmodell erweitert, welches eine mittellast- und temperaturunabhängige Berechnung unter Berücksichtigung der Anisotropie ermöglicht. Die Validierung der statischen und schwingenden Beanspruchung erfolgt an einer einfachen Probestabgeometrie sowie einem Strukturbauteil, einem PKW-MotorträgerThermally and mechanically highly stressed automotive components require the use of highly resistant materials, with low material costs and efficient processing. Phenolic resin molding compounds represent a class of materials, which can open up new applications for a polymeric material use due to their property profile. In the present work, the fundamentals of a simulation chain of fluid mechanical and structural simulation of phenolic resins with short and long glass fiber reinforcement are developed, with a view to component development using integrative simulation. Based on extensive process investigations the derived flow behavior can be described using the block/ shear flow model. However, the results of microstructure analysis show a dynamic of fiber orientation, which can not be predicted at the present time using the empirical models of classical injection molding simulation. Accordingly, the micromechanical modeling is carried out at the experimentally determined microstructure. That allows the inclusion of fiber bundling and bending in the mechanical structure analysis. The derived elastoplastic material model is extended by a fatigue failure model to predict the fatigue behavior under harmonic and non-harmonic cyclic stress which allows a calculation taking into account the anisotropy, the stress ratio and the temperature. The validation of the static stress and fatigue is performed both on a simple test bar geometry and a structural component, an automotive engine bracket
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Drdlová, Světlana. "Model vzdělávání uživatelů v oblasti IT." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2014. http://www.nusl.cz/ntk/nusl-224621.
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This thesis deals with entry knowledge and overall IT education company situation analysis. Based on the analysis, I created an education plan or a model that has goal to enhance training effectiveness as well as to improve information technology know-how and use within the company in order to increase the company profit and at the same time help employees in their professional growth and thus enhance their loyalty and personal satisfaction.
Books on the topic "Kurucz models"
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Güler, A. Deniz. Eğitim iletişimi kurumu olarak çocuk televizyonu ve uygulamaları ile bir model önerisi. Eskişehir [Turkey]: Anadolu Üniversitesi, 1991.
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Baracchini, Leïla. Entre désert et toile. Création d’un art san contemporain au Kalahari. Éditions Alphil-Presses universitaires suisses, 2021. http://dx.doi.org/10.33055/alphil.03150.
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En 1990, à D’kar (Botswana), était créé le premier projet d’art à destination des populations san naro du Kalahari : le Kuru Art Project. De ce projet allait émerger un mouvement artistique de portée internationale, désormais connu sous le nom d’art san contemporain. À partir d’une ethnographie détaillée, Entre désert et toile raconte comment l’art est venu à D’kar et a transformé les pratiques et les modes de représentation, mais aussi le regard porté sur celles et ceux que la culture populaire avait jusqu’alors fait connaître en Occident en tant que chasseurs-cueilleurs nomades ou « Bushmen ». Combinant documents ethnographiques et historiques, il retrace les mouvements circulatoires inhérents à la création et à la diffusion de ces oeuvres sur les marchés de l’art internationaux. Médiations, traductions, rapports de pouvoir : ce livre questionne également les enjeux propres à l’ethnographie d’un processus créatif en contexte postcolonial. Comment maintenir une pratique ethnographique sans se retrouver soi-même engagé dans une dynamique qui impose aux images ses propres codes ? Et dès lors, quelle forme lui donner ? Ces questions amènent l’auteure à développer, dans la dernière partie de l’ouvrage, un portrait fragmentaire et sensible d’une artiste du Kuru Art Project, Coex’ae Bob. À partir d’une démarche collaborative, l’ethnologue et l’artiste y proposent une déambulation entre tableaux, plantes, textes et images, où se dessine une relation intime au Kalahari d’aujourd’hui. Préface de Nathalie Heinich
Book chapters on the topic "Kurucz models"
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Reber geb. Wiesenauer, Simone. "Schlussbetrachtung." In Internationale Zielmarktanalyse und Vertriebsentwicklung, 233–39. Wiesbaden: Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-32389-9_7.
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ZusammenfassungIn Kapitel 7 werden die Ergebnisse der Dissertation kurz und prägnant zusammengefasst und mit der anfangs aufgestellten Zielsetzung verglichen (Kapitel 7.1). Anschließend werden Empfehlungen für die Weiterentwicklung des ISA-Modells gegeben und Hypothesen für zukünftige Follow-up Studien zum ISA-Modell dargestellt (Kapitel 7.2). Zu guter Letzt wird auf Limitierungen der Dissertation eingegangen und einen Ausblick auf zukünftige Forschungsvorhaben unabhängig vom ISA-Modell gegeben (Kapitel 7.3).
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Mohan, C. O., and C. N. Ravishankar. "Textural Quality of Ready to Eat “Shrimp Kuruma” Processed in Retortable Pouches and Aluminium Cans." In Theoretical Models and Experimental Approaches in Physical Chemistry, 377–96. Apple Academic Press, 2018. http://dx.doi.org/10.1201/b22324-18.
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Collinge, John. "Prion disease." In New Oxford Textbook of Psychiatry, 351–61. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199696758.003.0044.
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The human prion diseases, also known as the subacute spongiform encephalopathies, have been traditionally classified into Creutzfeldt–Jakob disease (CJD), Gerstmann–Sträussler syndrome (GSS) (also known as Gerstmann–Sträussler–Scheinker disease), and kuru. Although rare, affecting about 1–2 per million worldwide per annum, remarkable attention has been recently focused on these diseases. This is because of the unique biology of the transmissible agent or prion, and also because bovine spongiform encephalopathy (BSE), an epidemic bovine prion disease, appears to have transmitted to humans as variant CJD (vCJD), opening the possibility of a significant threat to public health through dietary exposure to infected tissues. The transmissibility of the human diseases was demonstrated with the transmission, by intracerebral inoculation with brain homogenates into chimpanzees, of first kuru and then CJD in 1966 and 1968, respectively. Transmission of GSS followed in 1981. The prototypic prion disease is scrapie, a naturally occurring disease of sheep and goats, which has been recognized in Europe for over 200 years and which is present in the sheep flocks of many countries. Scrapie was demonstrated to be transmissible by inoculation in 1936 and the recognition that kuru, and then CJD, resembled scrapie in its histopathological appearances led to the suggestion that these diseases may also be transmissible. Kuru reached epidemic proportions amongst the Fore linguistic group in the Eastern Highlands of Papua New Guinea and was transmitted by ritual cannibalism. Since the cessation of cannibalism in the 1950s the disease has declined but a few cases still occur as a result of the long incubation periods in this condition, which may exceed 50 years. The term Creutzfeldt–Jakob disease was introduced by Spielmeyer in 1922 bringing together the case reports published by Creutzfeldt and Jakob. Several of these cases would not meet modern diagnostic criteria for CJD and indeed it was not until the demonstration of transmissibility allowed diagnostic criteria to be reassessed and refined that a clear diagnostic entity developed. All these diseases share common histopathological features; the classical triad of spongiform vacuolation (affecting any part of the cerebral grey matter), astrocytic proliferation, and neuronal loss, may be accompanied by the deposition of amyloid plaques.
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Boonthai, Chuleemas, Atcharaporn Somparn, and Barry Noller. "Using Zooplankton, Moina Micrura Kurz to Evaluate the Ecotoxicology of Pesticides Used in Paddy Fields of Thailand." In Pesticides in the Modern World - Risks and Benefits. InTech, 2011. http://dx.doi.org/10.5772/18275.
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Kar, Somnath. "Pollen fertility, viability and in vitro pollen germination studies in Mucuna Bracteata DC. Ex Kurz from Tripura." In Biological Sciences: Impacts on Modern Civilization, Current and Future Challenges. New Delhi Publishers, 2020. http://dx.doi.org/10.30954/ndp.bio.2020.33.
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"Communication skills and tips for Part 3 MRCOG Examination." In Tasks for Part 3 MRCOG Clinical Assessment, edited by Sambit Mukhopadhyay and Medha Sule. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198757122.003.0006.
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Good communication skills form a fundamental principle of the patient- centred clinical consultation. The new Part 3 of the MRCOG, assesses candidates based on their ability to apply the core clinical skills in the context of real- life scenarios. It assesses five core skills domains, with three relating to communication skills; i) Communicating with patients and their families, ii) Communicating with colleagues and iii) Information gathering. Communication skills in the Part 3 clinical assessment can be assessed in many forms: … ● Exploring patient symptoms or concerns (information gathering) ● Explaining a diagnosis, investigation or treatment (information giving) ● Involving the patient in a decision (shared decision making) ● Health promoting activities ● Obtaining informed consent for a procedure ● Breaking bad news ● Communicating with relatives ● Communicating with other members of the health care team … In order to provide patient- centred care, doctors must treat their patients as partners, involving them in the decision making regarding their care and instilling in them a sense of responsibility for their own health. When the patient feels that they are part of the team it increases their satisfaction with care, increases treatment adherence and improves clinical outcomes. It is these skills that are assessed in clinical assessment tasks involving communication. Clinical assessment candidates are often assessed in two communication domains; Process and Content. In order to do well in the information gathering stations, you must be aware of the differential diagnoses that may arise with various presentations and how to explore each one independently and as a collection. When it comes to information giving or shared decision marking, candidates need to be familiar with the most recent Royal College of Obstetrics and Gynaecology guidelines and know how to interpret their meaning to the patient and their families. The Calgary- Cambridge Model is one of the most recognized communication theories in medical education (Kurtz, 1996). This theory can be adapted to fit into most clinical scenarios. Using the Calgary- Cambridge Model, you should be able to obtain the majority of the points related to process.
Conference papers on the topic "Kurucz models"
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Barcza, S., J. M. Benkő, Joyce Ann Guzik, and Paul A. Bradley. "Physical Parameters of RR Lyrae Stars from Multicolor Photometry and Kurucz Atmospheric Models." In STELLAR PULSATION: CHALLENGES FOR THEORY AND OBSERVATION: Proceedings of the International Conference. AIP, 2009. http://dx.doi.org/10.1063/1.3246455.
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Yalçın, Mustafa. "Halkla İlişkiler Meslek Örgütlerinin Twitter Hesaplarının Halkla İlişkiler Modelleri Bağlamında Değerlendirilmesi." In COMMUNICATION AND TECHNOLOGY CONGRESS. ISTANBUL AYDIN UNIVERSITY, 2021. http://dx.doi.org/10.17932/ctc.2021/ctc21.046.
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Halkla ilişkiler, kurum ve hedef kitle arasındaki iletişimin sağlıklı bir şekilde yönetilmesini sağlamaktadır. Grunig ve Hunt, kurum ve hedef kitle arasındaki iletişimi, basın ajansı, kamuoyunu bilgilendirme, iki yönlü asimetrik ve iki yönlü simetrik iletişim modelleri üzerinden dört boyutta ele almıştır (Grunig ve Hunt, 1984: 13). Basın ajansı ve kamuoyunu bilgilendirme modelinde, kurumdan hedef kitleye tek yönlü iletişim yaklaşımı görülürken iki yönlü asimetrik ve iki yönlü simetrik modellerde ise kurumdan hedef kitleye, hedef kitleden kuruma doğru karşılıklı çift yönlü iletişim yaklaşımı görülmektedir. Geleneksel medya araçları, ilk iki model için yeterli olurken son iki model için özellikle iki yönlü simetrik iletişim modeli için yetersiz kalmıştır. Bilgi iletişim teknolojilerinde yaşanan hızlı gelişmeler ile birlikte ortaya çıkan sosyal medya platformları, iki yönlü asimetrik ve simetrik iletişim modellerinin uygulanmasına imkân tanımıştır. Sosyal medya, kurum ve hedef kitle arasında etkileşim imkânı vermesine rağmen bazı kurumlar, bu platformları geleneksel medya yaklaşımıyla yani tek yönlü bir şekilde yöneterek bu platformlardan gerçek anlamda faydalanamamaktadır. Diğer taraftan sosyal medyanın iki yönlü simetrik bir yaklaşımla yönetildiğinde daha başarılı olacağının farkında olan ve bu platformların doğasına uygun hareket eden kurumlar, hedef kitleleri ile iyi ilişkiler kurarak başarılı sonuçlar elde edebilmektedir. Bu çalışmanın amacı; halkla ilişkiler meslek örgütü olan Türkiye Halkla İlişkiler Derneği (TÜHİD), Kurumsal İletişimciler Derneği (KİD) ve İletişim Danışmanlığı Şirketleri Derneği’nin (İDA) Twitter hesaplarının halkla ilişkiler modelleri açısından nasıl kullanıldığını ortaya koymaktır. TÜHİD, İDA ve KİD’in 15 Eylül 2020-15 Mart 2021 tarihleri arasında Twitter paylaşımları ve takipçiler ile olan iletişim süreçleri incelenerek içerik analizine tabi tutulmuştur. Halkla ilişkiler modelleri temel alınarak yapılan analiz sonucunda üç meslek örgütünün de tek taraflı paylaşımlar yaptığı, takipçiler ile diyalog kurmadığı, dolayısıyla kamuoyunu bilgilendirme modeline uygun olarak Twitter hesabını yönettiği saptanmıştır.
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Thakrar, Ronak, Janani S. Murallidharan, and Simon P. Walker. "An Evaluation of the RPI Model for the Prediction of the Wall Heat Flux Partitioning in Subcooled Boiling Flows." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30125.
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Subcooled boiling flows are encountered in most nuclear reactor configurations. Wall heat flux partitioning models form an integral part of the subcooled boiling formulations in CFD codes. These models attempt to describe the flow of heat from the wall into the fluid by dividing it according to several mechanisms of heat transfer. This work presents a one-dimensional evaluation of the wall heat flux partitioning model of Kurul and Podowski, also referred to commonly as the RPI model, which is used in the state-of-the-art codes of today. This model was assessed against the measurements of Okawa et al. for a vertically upward subcooled boiling flow of water at near atmospheric pressure. Although the predictions showed good agreement with the measured wall temperatures, significant discrepancies were observed in the predictions of the constituent sub-models that comprised the overall model. Prospects for improvement are discussed.
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Saka, Murat, and Oktay Çetin. "Konteyner Taşımacılığı için Yeni Bir Model Önerisi: Köseköy Kuru Limanı." In III. Ulusal Liman Kongresi Uluslararası Katılımlı. Denizcilik Fakültesi: Dokuz Eylül Üniversitesi, 2017. http://dx.doi.org/10.18872/deu.df.ulk.2017.011.
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Pellacani, Filippo, Silvana Matturro Mestre, Sergio Chiva Vicent, and Rafael Macian Juan. "CFD Modeling of Subcooled Boiling in Vertical Bubbly Flow Condition Using ANSYS CFX 12." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-30206.
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Subcooled boiling in upward non-isothermal turbulent bubbly flow in tubes is numerically modeled using ANSYS-CFX 12 in this contribution. The approach is based on the RPI wall boiling model developed by Kurul and Podowski [1]. The interfacial non-drag forces are also investigated and included in the model. The Antal [5] model with different coefficients is used for the wall lubrication force. The lift force was calculated in two ways, with the Tomiyama model [4] and based on a constant value. The void fraction axial profiles for high pressure subcooled boiling in tubes are compared against the experimental data of Bartolomej [17] [18]. The pressure varies from 3 up to 6.89 MPa and the wall heat flux from 0.38 to 1.2 MW m−2. The mass flux range is between 900 and 1500 kg s−1m−2. The computational domain has up to 70000 nodes, and represents one eighth of a vertical pipe. In general, the models give predictions in close agreement with experimental results if the axial mean values are considered. The main difficulties for the simulation are observed for flow in transition to flow regimes with high void fraction, when the bubbly flow is not able to maintain the spherical condition of the bubbles, which is a requirement of the boiling models.
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Kruisbrink, A. Ch H., H. P. Morvan, and F. R. Pearce. "Progress in Smoothed Particle Hydrodynamics to Simulate Bearing Chambers." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26403.
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In this paper some novel Smoothed Particle Hydrodynamics (SPH) concepts are presented towards a feasibility study into the use of SPH for some aero-engine applications, e.g. for internal oil or fuel applications. A first challenge is to develop a capability to model complex wall geometries, associated with two-phase flows in gear boxes and bearing chambers for example. A demonstration is made of how such complex (for SPH) geometries can be built together with an outline of some of the wall boundary condition concepts used, including moving walls. This is an important feature for the application of SPH to engineering. Other boundary conditions are needed such as inlets, outlets and pressure boundaries, and a proper treatment of the free surface. These are outlined in the context of the proposed application. From an SPH flow simulation viewpoint, one of the challenges is to reduce the non-physical density variations arising from boundary conditions (at wall, free surface and interface), which are responsible for non-physical pressure variations and particle dynamics. The flow regimes found in the engineering systems outlined above involve droplets, filaments and films. It is therefore important to be able to handle the merging of fluids, as it is to model their interaction with another phase, which calls for appropriate multi-fluid and surface tension models. This paper introduces SPH, outlines a number of concepts listed above and presents some preliminary results towards the modeling of the KIT bearing chamber, as described by Kurz et al. [1]. This work builds on a number of numerical modeling communications made by the Nottingham team to SPHERIC, the ERCOFTAC Special Interest Group (SIG) for SPH.
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Lundberg, Hannah J., and Markus A. Wimmer. "Computational Framework for Determining Patient-Specific Total Knee Arthroplasty Loading." In ASME 2013 Conference on Frontiers in Medical Devices: Applications of Computer Modeling and Simulation. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fmd2013-16062.
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The demand for total knee arthroplasty (TKA) is increasing steadily. In 2007, Kurtz et al. [1] predicted that TKA procedures would increase from 402,100 in 2003 to 3.48 million by 2030. Recent US national inpatient survey data have borne out these trends [2, 3]. Furthermore, demand is growing fastest in people younger than 65 [4] — patients who will need their implants to last the longest. The major factors limiting prosthesis longevity involve wear of the polyethylene bearing surfaces. Wear continues to be a problem at the knee; for example, advances that reduce hip implant wear such as crosslinking of polyethylene are not widely used in TKA due to fears of early material breakdown under knee loading conditions [5]. Preclinical TKA testing is performed with knee wear simulators under generic walking conditions. Efforts are ongoing by us [6] and others [7] to improve the physiological relevance of current testing standards. Nevertheless, a simulator would need to run ∼eight months continuously to simulate 20 years of walking, assuming one-million steps per year and speed of one cycle per second. As a complementary tool, computational models can test multiple conditions efficiently and ensure a faster turnaround time in the design process to eliminate inferior designs earlier. The purpose of this work is to describe a computational framework for predicting TKA loading, and ultimately implant longevity, on a patient-specific basis. The rationale is that, after developing a patient-specific computational framework, TKA designs of any material and under any patient behavior can be modulated to promote contact conditions best for implant longevity.
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BULU, Hatice. "Halkla İlişkiler Amaçları Perspektifinde Sağlık Bakanlığı’nın Pandemi Sürecinde Sosyal Medya Paylaşımları: T.C. Sağlık Bakanlığı Instagram Hesabı İçerik Analizi." In COMMUNICATION AND TECHNOLOGY CONGRESS. ISTANBUL AYDIN UNIVERSITY, 2021. http://dx.doi.org/10.17932/ctc.2021/ctc21.050.
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Günümüz yaşanan teknolojik gelişmeler bireyleri geleneksel anlamda kullanılan kitle iletişim araçların- dan uzaklaştırarak, modern dijital yöntem ve tekniklere yöneltmiştir. İnternetin kişilerin yaşantısında yer etmesiyle birlikte enformasyon toplumuna ve dijital çağa adım atılmıştır. Bireyler eski yaşantılarına nazaran bilgiye ulaşmak ve bunu diledikleri gibi yayma açısından sınıf atlamışlardır. Gerek kişiler gerekse de kurumlar meydana gelen bir durum ya da gelişmeyi anlık olarak kitlelere ulaştırabilmekte, seslerini duyurabilmektedirler. İleti ve içeriklerin hızlı bir şekilde yayıldığı platformlardan biri de sosyal medya mecralarıdır. Halkla ilişkilerin kurum ve kamuoyu arasında karşılıklı anlayış, iletişim ve uyumu sağladığını göz önünde bulundurulduğunda, sosyal medyanın halkla ilişkiler açısından önemli bir araç olduğunu söylemek mümkün. Küresel anlamda hızla yayılan Covid-19 salgını nedeniyle Dünya Sağlık Örgütü Pandemi ilan etmiştir, Türkiye’de ilk vakanın 11 Mart 2019 tarihinde görülmesiyle birlikte insanlar yoğun bir şekilde gündemi takip etmeye ve güncel olaydan haberdar olmaya çalışmışlardır. Bu bağlamda halkı olup bitenlerden haberdar etmek, bilgilendirmek adına yetkili kurumların geleneksel kitle ileti- şim araçlarının yanı sıra sosyal medya hesaplarına da yöneldikleri görülmektedir. Bu çalışma kapsamında Sağlık Bakanlığı’nın ‘’saglikbakanligi’’ adlı instagram hesabı üzerinden yapılan paylaşımların Grunig ve Hunt’ın Dört Halkla İlişkiler Modeli kapsamında halkla ilişkiler amaçları çerçevesinde ele alınıp incelenecektir. Çalışma kap- samında ‘’saglikbakanligi’’ instagram hesabı üzerinden 1 Aralık 2020 ve 1 Mart 2021 tarihleri arasında paylaşılan iletiler üzerinden içerik analizi yapılacaktır. Yöntem olarak paylaşımlar farklı başlıklar altında sınıflandırılacak. Sağlık Bakanlığı instagram hesabının 1 Aralık 2020 ve 1 Mart 2021 tarihleri arasındaki paylaşımların verileri, pay- laşımların türüne ilişkin veriler, paylaşılan postların altında kullanılan metnin dil özellikleri ve Grunig ve Hunt’ın dört halkla ilişkiler modeli kapsamında halkla ilişkiler amaçlarına yönelik içerikler değerlendirilecek. Araştırma neticesinde ise elde edilen bulgulara bakıldığında Sağlık Bakanlığının instagram hesabı üzerinden halka yönelik açık, şeffaf ve katılımcı bir yaklaşım sergilediği saptanmış, kamuoyundan bu pandemi sürecinde aktif katılım ve desteğin beklendiği görülmüştür.
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Shahhosseini, A. Mehran, and Malur N. Srinivasan. "Micro-Macro Modeling of Continuous Cast Steel to Simulate the Effect of Casting Velocity and Pouring Temperature on Copper Segregation." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85463.
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One of the most serious problems in using recycled scrap for steel production is the occurrence of surface hot shortness during hot deformation due to the presence of copper in scrap. Copper causes surface hot shortness by liquid embrittlement. Therefore, the amount of the liquid copper-enriched phase penetrating into the grain boundaries should be identified in order to keep its effects within acceptable limits. In this regard, understanding the mechanism of segregation during solidification of steel is essential. This paper attempts to demonstrate micro-macro modeling of continuous cast steel to simulate the effect of casting velocity and pouring temperature on copper segregation. First, the temperature profiles at different times were determined using a finite element (macro) model and a segregation (micro) model based on Giovanola-Kurz approach is coupled with the macro model. It is necessary to couple the heat flow calculations from the macro model and the segregation calculations from the micro model because the rate of latent heat liberation is affected by the solute redistribution process, while the solute redistribution process depends on the cooling rates. As the casting velocity and pouring temperature strongly affect the solidification of continuous cast steel, they were chosen as the variables in this study. It is hoped that this study will enable the optimization of these variable to minimize the segregation of copper. This paper also demonstrates that by decreasing casting velocity and pouring temperature of a steel billet during continuous casting, solid-liquid interface moves faster to the center of the billet and there is less chance for diffusion of the residual elements in steel. Therefore, the chance of hot shortness of copper in the steel increases.