Littérature scientifique sur le sujet « Hansel Spittel »
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Articles de revues sur le sujet "Hansel Spittel"
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Tize Mha, Pierre, Prashant Dhondapure, Mohammad Jahazi, Amèvi Tongne et Olivier Pantalé. « Interpolation and Extrapolation Performance Measurement of Analytical and ANN-Based Flow Laws for Hot Deformation Behavior of Medium Carbon Steel ». Metals 13, no 3 (22 mars 2023) : 633. http://dx.doi.org/10.3390/met13030633.
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In the present work, a critical analysis of the most-commonly used analytical models and recently introduced ANN-based models was performed to evaluate their predictive accuracy within and outside the experimental interval used to generate them. The high-temperature deformation behavior of a medium carbon steel was studied over a wide range of strains, strain rates, and temperatures using hot compression tests on a Gleeble-3800. The experimental flow curves were modeled using the Johnson–Cook, Modified-Zerilli–Armstrong, Hansel–Spittel, Arrhenius, and PTM models, as well as an ANN model. The mean absolute relative error and root-mean-squared error values were used to quantify the predictive accuracy of the models analyzed. The results indicated that the Johnson–Cook and Modified-Zerilli–Armstrong models had a significant error, while the Hansel–Spittel, PTM, and Arrhenius models were able to predict the behavior of this alloy. The ANN model showed excellent agreement between the predicted and experimental flow curves, with an error of less than 0.62%. To validate the performance, the ability to interpolate and extrapolate the experimental data was also tested. The Hansel–Spittel, PTM, and Arrhenius models showed good interpolation and extrapolation capabilities. However, the ANN model was the most-powerful of all the models.
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Liang, Qiang, Xin Liu, Ping Li, Ping Ding et Xianming Zhang. « Development and Application of High-Temperature Constitutive Model of HNi55-7-4-2 Alloy ». Metals 10, no 9 (17 septembre 2020) : 1250. http://dx.doi.org/10.3390/met10091250.
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The constitutive model is still not available for theoretical and engineering analysis of HNi55-7-4-2 alloy, which is a new type of wear-resistant brass alloy widely applied to car synchronizer rings and ship condenser tubes etc. In the current investigation, a friction-corrected stress-strain curve was obtained through a hot-compression test to develop the high-temperature constitutive model of HNi55-7-4-2 alloy based on the Hansel–Spittel model. By comparing predicted flow stress and a simulated force-stroke curve with experimental results, the proposed constitutive model was verified. The developed constitutive model was applied to numerically simulate the hot precision forging of a synchronizer ring. The simulation results based on two process plans on material flow and forging defects were validated by process experiment. The Hansel–Spittel high-temperature constitutive model proposed in this work enables the theoretical and engineering analysis of HNi55-7-4-2 alloy.
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Niu, Liqun, Qi Zhang, Bo Wang, Bin Han, Hao Li et Tangjie Mei. « A modified Hansel-Spittel constitutive equation of Ti-6Al-4V during cogging process ». Journal of Alloys and Compounds 894 (février 2022) : 162387. http://dx.doi.org/10.1016/j.jallcom.2021.162387.
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Gavrus, Adinel, Daniela Pintilie et Roxana Nedelcu. « Studies Concerning Numerical Prediction of Metal Fibering Obtained by Cold Bulk Forming Using Sensitivity Analysis of Tribological and Rheological Properties on a Cylindrical Crushing Process ». Applied Mechanics and Materials 841 (juin 2016) : 29–38. http://dx.doi.org/10.4028/www.scientific.net/amm.841.29.
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The present research paper concerns a numerical and experimental analysis of the tribologic and rheological constitutive behavior influence on prediction of metallic material forging fibering. Numerical analysis using finite element Forge® code and Abaqus software show the high importance of the friction law formulation and of the material rheological softening on the fibers morphology and on their position coordinates. Calibration and sensitivity of friction law together with the numerical sensitivity of the softening term corresponding to a Hansel-Spittel rheological equation have been studied for a cylindrical crushing test of a 16MnCr5 steel.
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Chen, Xuewen, Tingting Lian, Bo Zhang, Yuqing Du, Kexue Du, Bingqi Liu, Zhipeng Li, Xuanhe Tian et Dong-Won Jung. « The Parameters Identification of High-Temperature Constitutive Model Based on Inverse Optimization Method and 3D Processing Map of Cr8 Alloy Steel ». Materials 14, no 9 (26 avril 2021) : 2216. http://dx.doi.org/10.3390/ma14092216.
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As a novel kind of cold roller steel, Cr8 alloy steel has the characteristics of high hardness, high wear resistance and good toughness, which can effectively prolong the service life of the roller that is an important part of the steel rolling mill. How to accurately define the constitutive model parameters of metal materials is the major problem, because it seriously affects the accuracy of numerical simulation results of the roller hot forming process. In the study of Cr8 alloy steel’s thermal deformation behavior of the present paper, the high temperature compression test was done on a Gleebel-1500D thermal/force simulation testing machine. A novel method of parameter identification was proposed based on inverse optimization. The Hansel–Spittel constitutive model was established by using the inverse optimization method. To carry out the verification on the accuracy of the established constitutive model, the predicted flow-stress of constitutive model was made a contrast to the experimental flow-stress, and the standard statistical parameters were also applied to further evaluation. The results showed a relatively high prediction accuracy of the Hansel–Spittel constitutive model based on the inverse optimization algorithm. Meanwhile, to obtain optimal parameters of Cr8 alloy steel in the thermal processing, 3D thermal processing maps concerning strain-rate, strain and temperature were built based on the dynamic material model. According to the 3D processing map, the most adequate thermal processing parameters of Cr8 alloy steel were obtianed as follows: strain 0.2–0.4, strain-rate 0.05–0.005 s−1, temperature 1100–1150 °C.
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Chen, Xuewen, Nana Wang, Xiang Ma et Huijun Zhou. « Hot deformation behaviour and Hansel-Spittel constitutive model of Cr5 alloy for heavy backup roll ». International Journal of Computational Materials Science and Surface Engineering 7, no 3/4 (2018) : 205. http://dx.doi.org/10.1504/ijcmsse.2018.095321.
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Wang, Nana, Huijun Zhou, Xiang Ma et Xuewen Chen. « Hot deformation behaviour and Hansel-Spittel constitutive model of Cr5 alloy for heavy backup roll ». International Journal of Computational Materials Science and Surface Engineering 7, no 3/4 (2018) : 205. http://dx.doi.org/10.1504/ijcmsse.2018.10016524.
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Medvediev, Мikhailo, Yaroslav Frolov, Vitalii Andreiev, Oleksandr Bobukh et Аnastasiya Vovk. « EXPERIMENTAL ESTIMATION OF MAXIMAL DUCTILITY AND FLOW CURVES OF TITANIUM ALLOYS WITH HOT-TORSION TESTS ». Metallurgicheskaya i gornorudnaya promyshlennost, no 5-6 (27 décembre 2019) : 114–22. http://dx.doi.org/10.34185/0543-5749.2019-5-6-114-122.
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Purpose. The purpose of this work is to clarify the temperature-deformation modes of pressing pipes of titanium alloys (VT1-0, PT-7M, VT-14, VT-15, TS-5 and TS-6) and to determine the regression coefficients of the Hansel-Spittel equation by investigating plasticity and the deformation resistance during hot rotation of the specimens.Methodology. Studies on torsion were performed on a torsion test machine with a horizontal electronic force meter, with a maximum torque of 100 H × m, temperature. The maximum temperature of the test specimens was 1250 °C. Active capture of the test machine has a smooth rotation control from 5 to 200 rpm. Applying specimens with different aspect ratio to the length of the workpiece obtained a range of change of strain rates from 0.25 to 20 с-1.Findings. The main results of the study should be considered experimentally determined curves of the torque dependence on the angle of rotation of the sample to change the resistance of deformation of the metal, which allowed to clarify the temperature interval of maximum ductility during pressure treatment for alloys VT1-0, PT-7M, VT-14, VT-15, TS-5 and TS-6. Based on the data obtained on the deformation resistance, the coefficients of the Hansel-Spittel equation, which can be used to quantify the resulting stress in numerical simulation using the finite element method, have been statistically calculated.Originality. The data on experimentally determined regularities of influence of temperature-deformation modes of torsion on the change of the value of deformation resistance, which is characteristic of conditions of hot pressing of pipes, have been further developed. This allows to predict the power parameters of the deformation process, as well as to select the press equipment and improve the productivity of the press line.Practical implications. Studies on torsion have allowed to determine rational temperature-speed parameters of the process of pressing pipes from titanium alloys VT1-0, PT-7M, VT-14, VT-15, TS-5 and TS-6, for capacities of Ukrainian enterprises.
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Jia, Xiangdong, Zhenyu Fan, Zhan Luo, Gang Hu et Hongyao Zhang. « Impact of Heat Treatment Parameters on the Plastic Properties of 6061 Aluminum Alloy ». Materials 18, no 8 (9 avril 2025) : 1705. https://doi.org/10.3390/ma18081705.
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The 6061 aluminum alloy is extensively utilized in the production of aircraft components, valve parts, and maritime equipment, owing to its exceptional corrosion resistance, weldability, machinability, and anodic oxidation performance. This study investigates the effects of different heat treatment parameters on the mechanical properties of 6061 aluminum alloy. A series of orthogonal experiments were conducted, including quasi-static tensile tests using a QJBV212F-300KN universal testing machine following different solution and aging treatments. Scanning electron microscopy (SEM) was employed for microstructural characterization, revealing the mechanisms by which different heat treatment conditions impact the alloy’s mechanical properties. The test results indicate that the plasticity of 6061 aluminum alloy improves progressively within the temperature range of 510 °C to 540 °C. However, when the solution treatment temperature is elevated to 570 °C, significant grain coarsening occurs, leading to increased brittleness at the grain boundaries and reduced plasticity. Additionally, the elongation of 6061 aluminum alloy initially decreases and then increases as the aging time increases. Based on the experiments, a Hansel–Spittel constitutive model was developed, incorporating temperature, strain rate, and strain effects to accurately predict the flow stress of 6061 aluminum alloy under varying heat treatment conditions.
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Harris, Nathan, Davood Shahriari et Mohammad Jahazi. « Analysis of Void Closure during Open Die Forging Process of Large Size Steel Ingots ». Key Engineering Materials 716 (octobre 2016) : 579–85. http://dx.doi.org/10.4028/www.scientific.net/kem.716.579.
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Large size forged ingots, made of high strength steel, are widely used in aerospace, transport and energy applications. The presence of internal voids in the as-cast ingot may significantly affect the mechanical properties of final products. Thus, such internal defects must be eliminated during first steps of the open die forging process. In this paper, the effect of in-billet void positioning on void closure throughout the ingot breakdown process and specifically the upsetting step in a large ingot size steel is quantitatively investigated. The developed Hansel-Spittel material model for new high strength steel is used in this study. The ingot forging process (3D simulation) was simulated with Forge NxT 1.0® according to existing industrial data. A degree of closure of ten virtual existing voids was evaluated using a semi-analytical void closure model. It is found that the upsetting process is most effective for void closure in core regions and central upper billet including certain areas within the dead metal zone (DMZ). The volumetric strain rate is determined and two types of inertial effects are observed. The dependence of void closure on accumulated equivalent deformation is calculated and discussed in relation to void in-billet locations. The original combination of information from both relative void closure and the volumetric strain rate provides a way to optimize the forging process in terms of void elimination.
Thèses sur le sujet "Hansel Spittel"
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Hammami, Souhir. « Étude numérique et expérimentale du procédé de forgeage des produits en laiton CuZn40Pb2 (CW617N) ». Electronic Thesis or Diss., Valenciennes, Université Polytechnique Hauts-de-France, 2025. http://www.theses.fr/2025UPHF0019.
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Le laiton est un matériau très utilisé dans le secteur robinetterie. La mise en forme de ce matériau repose principalement sur la technique de forgeage. Afin d'avoir une meilleure compréhension du procédé de forgeage des pièces en laiton, des recherches ont été entreprises pour analyser et modéliser le comportement de ce matériau. Au début, une série d'expériences de compression à chaud a été réalisée à l'aide d'un simulateur thermomécanique. Ces essais ont permis de déterminer les valeurs des paramètres nécessaires pour un modèle numérique, loi de Hansel Spittel, qui décrit le comportement de l'alliage CuZn40Pb2 dans un intervalle de températures compris entre 550 à 750 °C, ainsi que des vitesses de déformation de 0,1, 1 et 10/s. Les paramètres du modèle ont par la suite été incorporés dans le logiciel Forge NxT d'analyse par éléments finis, pour simuler le comportement réel du processus de forgeage. Par la suite, une étude de l'endommagement a été menée à travers des essais de forgeage, dans le but de déterminer les défauts mécaniques susceptibles de survenir lors du forgeage et d'établir les limites de formabilité du matériau. Les résultats obtenus ont permis de déterminer les bonnes combinaisons de température et de vitesse de forgeage pour éviter la formation de fissures sur les pièces. Enfin, des essais de frottement UST ont été utilisés pour examiner le comportement tribologique. Ces essais ont révélé que chaque paramètre influençait le coefficient de frottement ainsi que l'état de surface des piècesBrass is a material widely used in the faucet industry. The shaping of this material primarily relies on the forging technique. To better understand the forging process of brass components, research has been undertaken to analyze and model the behavior of this material. Initially, a series of hot compression experiments was carried out using a thermo-mechanical simulator. These experiments allowed for the identification of parameters for a numerical model, the Hansel-Spittel law, which describes the behavior of the CuZn40Pb2 alloy within a temperature range of 550 to 750°C and strain rates of 0.1, 1, and 10/s. The model parameters were then integrated into finite element software, Forge 3D, to simulate the actual behavior of the forging process. Subsequently, a damage study was conducted through forging tests to determine the mechanical defects likely to occur during forging and to establish the material's formability limits. The results obtained enabled the determination of optimal combinations of temperature and forging speed to avoid crack formation on the components. Finally, tribological behavior was studied using UST friction tests. These tests revealed that each parameter influenced the friction coefficient as well as the surface condition of the components
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Toledo, Rafaela Cunha Matheus Rodrigues. « Qualidade de vida : adaptação cultural do Spitzer Quality of life Index ». [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/311473.
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Orientador: Neusa Maria Costa AlexandreDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
Made available in DSpace on 2018-08-10T11:31:10Z (GMT). No. of bitstreams: 1 Toledo_RafaelaCunhaMatheusRodrigues_M.pdf: 1107544 bytes, checksum: add6821e0b03db6a171a46906f66df52 (MD5) Previous issue date: 2007
Resumo: Atualmente a literatura tem apresentado inúmeras tentativas de prevenção e controle da dor lombar. A natureza multifatorial dos fatores de risco associados a esta afecção representa considerável desafio para a determinação de estratégias de intervenção que sejam realmente efetivas no seu controle. O caráter crônico e incapacitante da lombalgia faz com que esta condição clínica tenha repercussões importantes na vida do sujeito, comprometendo de forma significativa a qualidade de vida de seus portadores. A literatura internacional tem relatado o uso do Quality of Ufe Index - Spitzer (QLI) para avaliar a qualidade de vida de pacientes portadores de dor lombar. A adaptação cultural de escalas e questionários já validados em outra língua tem sido amplamente recomendada, uma vez que facilita a troca de informações entre a comunidade científica. Dessa forma, com a finalidade de disponibilizar para a comunidade científica brasileira um instrumento de avaliação genérica de qualidade de vida, este estudo teve como objetivo realizar a adaptação cultural do instrumento Spitzer Quality of Ufe Index para a língua portuguesa do Brasil, bem como avaliar sua confiabilidade junto a pacientes portadores de dor lombar crônica. Para assegurar a qualidade da adaptação, foram seguidos os passos metodológicos recomendados por publicações especializadas: tradução do instrumento para a língua portuguesa do Brasil, retro-tradução, avaliação por um comitê de juízes, préteste, avaliação da confiabilidade e validade. Inicialmente o questionário foi traduzido por dois tradutores bilíngües de forma independente, que possuíam como língua materna a língua portuguesa do Brasil. Posteriormente, dois outros tradutores cuja língua materna era o inglês, fizeram a retro-tradução. Um comitê composto por seis especialistas revisou e comparou as traduções obtidas, desenvolvendo a versão final para a aplicação do préteste. O pré-teste foi realizado em 40 pacientes portadores de dor lombar crônica. A confiabilidade foi avaliada por meio da consistência interna e da estabilidade (testereteste). A validade foi obtida por meio da análise de correlação entre os escores do instrumento Spitzer (QLI), com o SF-36 e com o Ro/and-Morris. As propriedades psicométricas da versão traduzi da foram avaliadas auto-aplicando o instrumento 'em 120 pacientes com lombalgia crônica. Os resultados demonstraram que o instrumento é confiável apresentando consistência interna satisfatória, indicada pelo coeficiente alfa de Cronbach=0,76 para o teste e 0,77 para o reteste. No teste-reteste os resultados apontaram uma elevada correlação intraclasse ICC=0.960 (p<0,001; IC950/0: 0,943; 0,972). O coeficiente de correlação de Spearman foi de r=0,937 (p<0,001), indicando também elevada concordância entre os valores do escore do Spitzer (QLI) no teste/reteste. As correlações entre o escore do Spitzer (QLI) e as diferentes dimensões do SF-36 mostraram-se significativas. Os coeficientes de correlação mais elevados foram: Dor (r= 0,699), Aspectos Físicos (r=0,687), Capacidade Funcional (r=0,682) e Aspectos Sociais (r=0,680). Também foi constatada correlação significativa entre os escores do Spitzer (QLI) e do questionário Roland-Morris (r=0,730). Conclui-se que o processo de adaptação cultural foi realizado com sucesso e que a versão adaptada apresenta medidas psicométricas confiáveis e válidas na cultura brasileira
Abstract: The current literature has presented innumerable attempts to prevent and controllow back pain. The multifactorial nature of risk factors associated with this affection represents a considerable challenge in the determination of interventional strategies that will be truly effective to control it. The chronic and incapacitating characteristics of low back pain result in important repercussions on the patient' s life significantly compromising the quality of life of those who have this condition. The intemational literature has reported the use of the Quality of Ufe Index - Spitzer (QU) for the evaluation of the quality of life of patients with low back pain. Thecultural adaptation of scales and questionnaires validated in another language has been widely recommended, since it facilitates the scientific information exchange. In this manner, with the purpose of making available to the Brazilian scientific community an instrument for comprehensive evaluation of quality of life, this study had as objective carrying out the cultural adaptation the Spitzer Quality of Ufe Index questionnaire into the Brazilian Portuguese language, and as to evaluate its reliability in patients suffering from low back pain. In order to ensure this adaptation quality, the methodological steps recommended by specialized publications were followed: translation of the instrument into the Brazilian Portuguese language, back-translation, evaluation by a committee of judges, pretest, and reliability and validity assessment. At first, the questionnaire was independently translated by two bilingual translators, who had Brazilian Portuguese as their rnother language. Subsequently, two other translators whose mother language was English did the back-translation. A committee composed of six specialists revised and compareci the translations obtained, developing the final version for pretest application. The pretest was carried out with 40 patients suffering from low back pain. The reliability was estimated through stability (test-retest) and homogeneity assessmenl The validity was tested comparing scores 01' the obtained by means of correlation analysis among thescores of the Spitzer (QU) 'with the SF-36 and the Roland-Morris. The psychometric properties of the translated version were evaluated by the self-application instrument on 120 patients with chronic low back pain. The Cronbach's Alpha was 0.76 for the test and 0.77 for the retest, showing satisfactory internal consistency results. Using the intraclass correlation coefficient for test-retest, the reliability was ICC = 0.960 (p<0.001; IC95%: 0.943; 0.972). The reliability determined by the Spearman's Correlation Coefficient was 0.937 (p<0.001). There was significant correlation between the Spitzer (QU) scores and the different dimensions of the SF-36 questionnaire. The highest correlation coefficients were for Bodily Pain (r = 0.699), Role Functioning (r = 0.687), Physical Functioning (r = 0.682) arid Social Functioning (r = 0.680). A significant correlation was found between the Spitzer (QU) and the Roland-Morris questionnaire scores (r = 0.730). The cultural adaptation .process was conducted successfully and the adapted version presents psychometric rneasures which are reliable and valid in the Brazilian culture
Mestrado
Enfermagem e Trabalho
Mestre em Enfermagem
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Wiesse, Rebagliati Jorge Raúl. « El Quijote de Coseriu ». Pontificia Universidad Católica del Perú, 2018. http://repositorio.pucp.edu.pe/index/handle/123456789/123792.
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En su amplia obra lingüística, Eugenio Coseriu (Mihaileni, 1921 - Tübingen, 2002), acude varias veces a la literatura para ejemplificar conceptos lingüísticos teóricos e incluso para modelarlos. Como ocurre con varios estudiosos del siglo XX (José Ortega y Gasset o Mijaíl Bajtín, por ejemplo), el Quijote es, para Coseriu, incitación para formular reflexiones que no se aplican exclusivamente a él, como sí lo hacen otras obras relevantes del cervantismo del siglo XX, señaladamente los trabajos de Stephen Gilman y Edward C. Riley. El presente artículo busca rastrear las referencias al Quijote y a Cervantes en la obra de Coseriu y, sobre todo, presentar y discutir la corrección hecha por Coseriu al importante trabajo de Leo Spitzer “Perspectivismo lingüístico en el Quijote”.In his extensive linguistic work, Eugenio Coseriu (Mihaileni, 1921 - Tübingen, 2002), uses literature several times to exemplify theoretical linguistic concepts and even to model them. As is the case with several 20th century scholars (José Ortega y Gasset or Mijaíl Bajtín), Don Quixote is, for Coseriu, a touchstone to formulate reflections that do not apply exclusively to it, as other relevant works of 20th century’s Cervantism, such as Stephen Gilman’s or and Edward C. Riley’s, do. This article seeks to trace the references of Don Quixote and Cervantes in Coseriu’s work and, above all, to present and discuss the correction made by Coseriu to Leo Spitzer’s “Perspectivismo lingüístico en el Quijote”.
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Chavarría, Garrido Luis Agustín. « Estudio Spitzer e Infrarrojo Cercano de Regiones de Formación de Estrellas Masivas : Cúmulos Embebidos ». Tesis, Universidad de Chile, 2009. http://www.repositorio.uchile.cl/handle/2250/101967.
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沈芳怡. « Design and fabrication study on silicon based of optical power spitters ». Thesis, 2002. http://ndltd.ncl.edu.tw/handle/31483025485406703837.
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碩士國立雲林科技大學
電子與資訊工程研究所碩士班
90
In this work, the single-mode and multi-mode optical power splitters of Y-branch waveguide type were designated to have low insertion losses and good uniformities. And the beam propagation method (BPM) was used to simulate the power splitters. Different structures of angled 、taper and S-bend types were incorporated into the Y-branch waveguides. The design considerations were based on the Bellcore GR-1209-core generic requirements for the fiber branching components. The optical fields at the output of the branches exhibit insertion losses lower than 4.0 dB for the 1×2 power splitters and lower than 7.5 dB for the 1×4 power splitters. The uniformities are less than 0.7 dB for the 1×2 power splitters and less than 1.4 dB for the 1×4 power splitters. The effects of TE and TM polarization will be examined. On the other hand, we will also discuss the influence of reflective index difference (Δn) and waveguide width (w) to loss. For the 1×2 and 1×4 single-mode power splitters, the lowest insertion losses were 3.098 dB and 6.726 dB. For the 1×2 multi-mode power splitters, the lowest insertion loss was 3.024 dB. And the best uniformity could be closed to 0 dB at the above power splitters.
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Wang, Hui-Hsuan, et 王惠萱. « The poetics of spittle : Metaphor studies in Bernard-Marie Koltes''s "The Night Just Before The Forests" ». Thesis, 2014. http://ndltd.ncl.edu.tw/handle/d7pdv7.
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碩士淡江大學
法國語文學系碩士班
102
This study deals with the play The Night just before the forests by the French author Bernard-Marie Koltes (1948-1989). It aims to rethink the functions of metaphor, then to exploit the metaphors in the title of the play, in the meeting scene, in those violent, vulgar, organic terms, and in the plight of the characters. We also focus on the Chinese translation of the play, since, like metaphor, translation is not a simple transfer, but the continuation of a process of meaning creation. Key word: Metaphor, Bernard-Marie Koltes, hermeneutics, translation
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Yan, Shing-wen, et 嚴幸文. « A study on the personality traits and job satisfactions of spital volunteers ». Thesis, 1993. http://ndltd.ncl.edu.tw/handle/37374921334876551804.
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魏家祥. « A Study and Review on Non-Life Insurance Brokering Market：Lessons Learned from Eliot Spitzer vs. Marsh & ; McLennan Case ». Thesis, 2007. http://ndltd.ncl.edu.tw/handle/56705147879163086700.
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碩士國立政治大學
經營管理碩士學程
95
In the insurance market, policies are sold through direct channels controlled by insurance companies or intermediaries, such as brokers and agents. Brokers play a vital role in the property & casualty insurance market and serving commercial clients with complex and large exposures. This report focusing on the commercial property & casualty insurance market, we look at the economic performance by brokers, the competitive structure of the marketplace, the compensation arrangements for brokers, and the placement with insurers. Furthermore, we also from regulators’ point of view to study and review a variety of issues, such as the ethics and conduct , conflict of interest, treating customers fairly, which are raised from insurance brokers industry. In contrast to captive agents, brokers act on behalf of the insured, for this circumstance, the role of the brokers is to increase price and coverage competitiveness, by providing the customers access to a wider range of possible insurers. Clearly the integrity of the bidding process is very important to protect the interest of customers and to the health of the insurance brokers market. Unfortunately, the integrity of the placement process by brokers has been questioned due to the allegations of bid rigging in which one or more global brokers and a few insurers appear to have conspired to submit non-competitive bids. This anti-competitive practice is not only detrimental to the customers but also cause public concerned that too much market power lead to abuses by brokers and that contingent commissions should be abolished. On October 14, 2004, New York Attorney General Eliot Spitzer filed suit against Marsh & McLennan alleging that the insurance brokers engaged in bid rigging and received widespread kickbacks from insurance companies. On January 31, 2005, Marsh agreed to pay $850 million in restitution to buyers as part of an agreement to settle the suit, but lawsuits still in progress. The above-mentioned case has revealed conflict of interest, anti-competitive and market manipulation for meg-brokers, in fact, these problems existed for a long time. Comparing with US and UK insurance brokers market, Taiwan is belong to emerging market, to gain knowledge of pioneer’s developing experience, we could shorten the time to get more progress. When we deal with the globalization challenge, local insurance broker market should be complied with international practices, improve relative rules and regulations is also necessary, once above situations are available, it could help domestic insurance market rapid and healthy growth.
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Stevens, Nancy. « From the Inside Out : Spirituality as the Heart of Aboriginal Helping in [spite of ?] Western Systems ». 2010. http://142.51.24.159/dspace/handle/10219/389.
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The degree of reclamation of culturally-based spiritual
practices varies by and within communities and families, but appears
to be gathering momentum. From the anecdotes provided by clients it
appears that healing takes its firmest roots when the spiritual aspects
of the individual’s life are attended to. More clients and helpers are
recognizing the need to look inward, to recognize the strength of their
spirit and the role spirituality plays in fostering resiliency. Working as
a helper, particularly within western systems, however, the challenges
can be daunting and frustrating with respect to incorporating
spirituality into the helping process. Although many helpers have
begun the dialogue, spirituality – and more particularly Aboriginal
spirituality – remains on the margins, raising questions and concerns
that have no simple solutions. This paper is a beginning in my
personal and professional consideration of how to more fully explore
and integrate spirituality with individuals, families and communities.
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Greuling, Andreas. « Ab-initio-Untersuchungen von Oberflächen- und Bulksystemen ». Doctoral thesis, 2010. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201012216754.
Texte intégralRésumé :
In dieser Arbeit setzen wir ab-initio-Methoden zur Untersuchung einiger Oberflächensysteme
und eines Bulksystems ein. Im Wesentlichen greifen wir hierbei auf die Dichtefunktionaltheorie
(DFT) und die GW-Approximation (GWA) im Rahmen der Vielteilchenstörungstheorie
zurück. Wir nutzen diese Methoden um die Adsorption von TMA auf der Rutil TiO2-Oberfläche zu untersuchen, optische Spektren von TiO2 zu berechnen und um die Adsorption von [7]-HCA auf der Calcit(10-14)-Oberfläche zu verstehen. Weiterhin beschäftigen wir uns intensiv mit PTCDA auf Ag(111), welches mit einer chemisch kontaktierten STM-Spitze manipuliert wird.
Livres sur le sujet "Hansel Spittel"
1
Mit Visionen an Die Spitze : Zukunftsorientiert Denken, Handeln und Führen. Westdeutscher Verlag GmbH, 2013.
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2
Clausing, Stefan. Die Spitze Im E-Commerce : Neues Wachstum Im Online-Handel Durch überlegene Differenzierung. Springer Fachmedien Wiesbaden GmbH, 2024.
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3
Majumdar, Sumit K. Productive Efficiency Analysis over Six Decades. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199641994.003.0006.
Texte intégralRésumé :
This chapter contains an efficiency analysis for Indian industry from 1950–51 to 2013–14. Overall, there had been consistent growth in manufacturing employment over six decades, though by the 2010s only 13 million persons, or 0.1% of the population, had industrial jobs. Capital widening and deepening in India was substantial. In the 1950s, productive efficiency was high. In the 1960s, average productive efficiency declined sharply. In the 1970s, productive efficiency declined and stagnated till the 1980s when it started rising again. In the 1990s, productive efficiency rose and efficiency patterns were stable till the late 2010s when decline set in. Productive efficiency began a downward trend in the 2010s. In spite of capital widening and deepening, Indian industry was inept at managing technology. Indian industry has not possessed the competence to handle the knowledge embodied in fixed capital inputs, which is a hallmark of modern economies.
Chapitres de livres sur le sujet "Hansel Spittel"
1
Chadha, K., D. Shahriari et M. Jahazi. « An Approach to Develop Hansel–Spittel Constitutive Equation during Ingot Breakdown Operation of Low Alloy Steels ». Dans Frontiers in Materials Processing, Applications, Research and Technology, 239–46. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4819-7_20.
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Zschaler, Frank. « Die Handels-Hochschule wird gegründet (1900–1906) ». Dans Vom Heilig-Geist-Spital zur Wirtschaftswissenschaftlichen Fakultät, 20–28. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59153-2_4.
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Zschaler, Frank. « Der lange Weg zur Handels-Hochschule (1791–1900) ». Dans Vom Heilig-Geist-Spital zur Wirtschaftswissenschaftlichen Fakultät, 10–19. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59153-2_3.
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Zschaler, Frank. « Konkurrenz oder Kooperation ? - Handels-Hochschule und Universität bis 1945 ». Dans Vom Heilig-Geist-Spital zur Wirtschaftswissenschaftlichen Fakultät, 49–58. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59153-2_7.
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Tamuly, Reeturaj, D. Ravi Kumar et S. Aravindan. « Optimization of Process Variables in Warm Extrusion of a Mg–Al–Zn Alloy by Numerical Simulation ». Dans Lecture Notes in Mechanical Engineering, 81–94. Cham : Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58006-2_7.
Texte intégralRésumé :
AbstractMagnesium alloys are extensively used in various fields such as automobile, defense, and aerospace due to their high specific strength and good damping properties. Extrusion is one of the important metal forming processes that is used to process the cast alloy into various useful shapes at high production rates. It is also known to improve the workability and strength of the material. Due to these advantages, interest on the extrusion of magnesium alloys has significantly increased in the recent past. But due to poor formability at room temperature, extrusion of Mg alloys in the warm forming temperature range is an important process in the fabrication of these alloys. Optimization of process variables is critical for the minimization of extrusion load and prevention of defects. In this work, numerical simulations of the extrusion process of a Mg–Al–Zn (AZ31) alloy are carried out to predict the optimum combination of process parameters, namely, extrusion ratio, extrusion speed, and extrusion temperature. Hansel Spittle model was used to define the flow stress curve in the simulation. The effect of the process parameters on extrusion load was studied, and the optimum die angle required to minimize the load required for extrusion was predicted.
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Mendelzon, Alberto O., et Alejandro A. Vaisman. « Time in Multidimensional Databases ». Dans Multidimensional Databases, 166–99. IGI Global, 2003. http://dx.doi.org/10.4018/978-1-59140-053-0.ch006.
Texte intégralRésumé :
In spite of the obvious importance of time in data warehousing and OLAP, current commercial systems do not support tracking the history of a data warehouse, either at the schema or instance level. In this chapter we address this issue, introducing the Temporal Multidimensional Model and a query language, denoted TOLAP, allowing expressing temporal OLAP queries at a high level of abstraction. Further, we show that previous work in temporal databases needs to be extended in order to handle evolution and versioning in OLAP. Finally, we present an implementation, along with preliminary experimental results.
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Prior, Robin. « 1940 – Crisis Year ». Dans Conquer We Must, 305–30. Yale University Press, 2022. http://dx.doi.org/10.12987/yale/9780300233407.003.0014.
Texte intégralRésumé :
This chapter looks into the period when Winston Churchill was establishing himself as Minister of Defence and Prime Minister after Neville Chamberlain's majority fell and he resigned. It elaborates on Churchill's War Cabinet and the work on keeping up with the war against the German army. Despite Churchill having little influence on military operations, he was a vital man in the crisis in 1940 as he ensured a policy of victory and military realism. Moreover, Churchill ensured that the war would be fought to an end in spite of whatever 1941 brought. The chapter also details the Blitz campaign, which was the last campaign in 1940 that Churchill had to handle.
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Rahman, Nayem. « A Simulation Model for Application Development in Enterprise Data Platforms ». Dans Encyclopedia of Data Science and Machine Learning, 2873–89. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9220-5.ch171.
Texte intégralRésumé :
Behind the scheduled delivery of poor-quality products overrunning the cost or budget are the major blames the software development industry has to handle even today, at its apparent peak period of excellence at present. In spite of continuous refinement over the last four-five decades, it is still not free from many genuine criticisms like these. To get rid of these criticisms gradually, proper evaluation of different software development controls and measures, and timely elimination of code defects in each stage of data platform application development are required to ensure better management of software development life cycle and improved performance of the launched software. This article presents a simulation model of a data platform using code inspection and code scorecard and comparing the removal rate of code defects. Results of the simulation model prepared by the authors show a significant reduction in code defects, improved software development processes, and flawless production execution, which is expected to enable the software developers to improve their current processes.
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Nieminen, Marko, Mika Siljander et Ilkka Hanski. « Structure and Dynamics of Melitaea cinxia Metapopulations ». Dans On the Wings of Checkerspots, 63–91. Oxford University PressNew York, NY, 2004. http://dx.doi.org/10.1093/oso/9780195158274.003.0004.
Texte intégralRésumé :
Abstract To place our research on the Glanville fritillary butterfly (Melitaea cinxia) in a historical perspective, consider the state of metapopulation ecology in 1990. The earlier history, reviewed by Hanski (19996), includes outstanding conceptual contributions by Wright (1940) in population genetics and evolution and by Nicholson (1933) and Andrewartha and Birch (1954) in population ecology. Several significant though somewhat isolated studies appeared in the 1950s and 1960s. Huffaker (1958) showed with a laboratory system of herbivorous mites and predatory mites that patchy habitat led to sufficient spatial asynchrony in population densities to allow the two species to coexist when they could not coexist in a more uniform habitat (the predator would cause the extinction of the prey). Den Boer (1968) argued on the basis of his studies on ground beetles that assemblages of local populations without strong density dependence but connected by some migration would persist by virtue of being influenced by different sequences of environmental perturbations-the spreading-of-risk idea. Gadgil (1971) showed for the first time how habitat patchiness would influence the evolution of a key life-history trait, migration rate. And then there was the illustrious work of Levins (1969), who proposed a simple mathematical model to demonstrate the possibility of metapopulation-level persistence of a set of extinction-prone local populations, essentially because he assumed that different populations have independent dynamics, and hence there was time for recolonizations to compensate for local extinctions before the entire metapopulation would go extinct. But in spite of these studies, the field was still wide open in 1990, as is shown by the few citations to the key word “metapopulation” before 1990 and the exponential growth of such citations afterwards (Hanski and Simberloff 1997).
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Fox, Michael H. « Now What ? » Dans Why We Need Nuclear Power. Oxford University Press, 2014. http://dx.doi.org/10.1093/oso/9780199344574.003.0019.
Texte intégralRésumé :
Time is running short! When the Intergovernmental Panel on Climate Change (IPCC) published its first scientific report in 1990 on the possibility of humancaused global warming, the atmospheric concentration of carbon dioxide (CO2 ) was 354 ppm. When I began writing this book about four years ago, the concentration of CO2 was 387 ppm. It is now 397 ppm and rising. In spite of Kyoto, in spite of Copenhagen and Cancun, atmospheric CO2 continues its inexorable upward path. And the earth continues to warm. The United States and the world are not yet serious about changing policies to stop this spiral. Too many politicians and others have their heads buried in the sand and refuse to acknowledge the continuing deluge of data showing that the world is indeed warming. 2010 was the warmest year—and the decade from 2000 to 2010 was the warmest decade—for at least the last 100,000 years. A serious debate is ongoing among geologists to decide if the earth has formally passed out of the Holocene epoch of the last 12,000 years into the Anthropocene epoch, in which 7 billion humans are the primary factor driving climate. Sea levels continue to rise, the oceans are acidifying, glaciers and ice sheets continue to melt, the Arctic will likely be ice-free during the summer sometime this century, and weather extremes have become commonplace around the earth. Plant and animal species are migrating to higher latitudes at 17 kilometers per decade on average, and alpine species are moving to higher altitudes at 11 meters every decade. Changes like this have occurred in the past, but over time spans of thousands to tens of thousands of years, giving species time to adapt. There are those who argue that species have always had to adapt to a changing climate or die and therefore they will handle the current changes. While there is some truth to that, it ignores the fact that many species are already under great pressure from the impact of humans on habitat.
Actes de conférences sur le sujet "Hansel Spittel"
1
Wongwanich, Yodyot, et Robert H. Sturges. « Analysis and Design for Two-Handed Heavy Part Assembly Methods ». Dans ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39415.
Texte intégralRésumé :
In spite of advances in industrial automation, manual assembly tasks continue to be an important feature of many industrial operations. In heavy part assembly, some pieces of raw material or equipment are too heavy to be safely handled by just one operator. Material handling devices such as Jib cranes or overhead cranes are employed to help operators work safer and, in some cases, faster. However, during full-load productions, access to these devices could become limited due to insufficient resources and hence, delay or extend the cycle times. The authors studied how people perform the assembly and subsequently applied Fitts’ Index of Difficulty to develop a model which indicates factors that increase the task difficulty. This model can also be used as an assembly time predictor. Since improving the efficiency of an overhead crane could significantly reduce the total cycle times and production costs, the authors modified the crane by adding a spring between the hook and the gripper to help support the weight. Two sets of experiments were conducted. The first set was to investigate the effect of spring stiffness on assembly time. The result indicated that using a spring that was too soft could create a parasitic oscillation, which increases the assembly time. The objective of the second set was to compare the assembly time of using the regular crane to that of the modified crane in situations where the part weights and the task difficulty vary. As a result of the modifications, assembly performance tended to increase by approximately 250% from using the modified crane.
2
Gerbert, Göran, et Francesco Sorge. « Full Sliding “Adhesive-Like” Contact of V-Belts ». Dans ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14413.
Texte intégralRésumé :
Abstract Analysis of power transmission in a belt drive consisting of e. g. two pulleys might be treated as a boundary value problem. Tight side tension FT, slack side tension FS and the wrap angle α are the three natural boundary conditions. In the literature, theories are developed where seating and unseating as well as the power transmitting part of the contact are considered. The solutions presented so far don’t fulfil the boundary conditions properly, since a certain tension ratio FT/FS is associated with a certain contact angle and not an a priori specified one. It appears that a new type of full sliding solution must be introduced to handle the boundary condition problem. During part of the contact there is almost no tension variation in spite of the full sliding conditions. The designation adhesive like solution is here introduced for that part. Conditions and character of the adhesive like solution are outlined in the paper.
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Calvanese, Diego, Giuseppe De Giacomo, Marco Montali et Fabio Patrizi. « Verification and Monitoring for First-Order LTL with Persistence-Preserving Quantification over Finite and Infinite Traces ». Dans Thirty-First International Joint Conference on Artificial Intelligence {IJCAI-22}. California : International Joint Conferences on Artificial Intelligence Organization, 2022. http://dx.doi.org/10.24963/ijcai.2022/354.
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We address the problem of model checking first-order dynamic systems where new objects can be injected in the active domain during execution. Notable examples are systems induced by a first-order action theory, e.g., expressed in the Situation Calculus. Recent results have shown that, under the state-boundedness assumption, such systems, in spite of having a first-order representation of the state, admit decidable model checking for full first-order mu-calculus. However, interestingly, model checking remains undecidable in the case of first-order LTL (LTL-FO). In this paper, we show that in LTL-FOp, which is the fragment of LTL-FO in which quantification is over objects that persist along traces, model checking state-bounded systems becomes decidable over finite and infinite traces. We then employ this result to show how to handle monitoring of LTL-FOp properties against a trace stemming from an unknown state-bounded dynamic system, simultaneously considering the finite trace up to the current point, and all its possibly infinite future continuations.
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Yang, Jing, Dung L. Tran et Luis San Andrés. « Computational Fluid Dynamics Analysis and Experimental Results for the Dynamic Performance of Two Long Smooth Surface Annular Seals Operating With a Liquid in Air Mixture ». Dans ASME Turbo Expo 2023 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-102302.
Texte intégralRésumé :
Abstract Compressors in subsea oil and gas production must handle wet gases to reliably operate for extended periods of time. Annular clearance seals contribute to compressor performance and do affect system rotordynamic stability. Prior experimental work with two smooth surface, uniform clearance seals supplied with a light oil in air mixture and undergoing similar operating conditions produced direct stiffnesses (K) with distinct trends as the liquid content increased to 8% in volume. Both seals differ in length and diameter albeit having similar radial clearance. Other force coefficients for both seals, namely cross-coupled stiffness (k) and direct damping (C) increase as the inlet liquid volume fraction (LVF) grows. Rationale for the peculiar differences in centering stiffness (K) is missing. Hence, a computational fluid dynamics (CFD) model and its predictions, the thrust of this paper, unveil flow field details (pressure, velocity fields, and liquid content evolution) for the oil in air mixture. Besides the CFD model, an enhanced bulk-flow model (BFM) also predicts the seals’ leakage and dynamic force coefficients. Both models predict through flows agreeing well with the measured ones, the maximum difference is less than 16%. The BFM direct stiffness (K) does reproduce closely the experimental K whereas the direct damping coefficient (C) is up to ∼ 41% lower than the test result. The CFD model captures the variation trend of K vs. inlet LVF for the first seal, albeit its magnitude is thrice the experimental stiffness. The CFD C agrees well with the test data for both seals, the largest difference is less than 10%. In spite of the complexity of the CFD model, significant differences with the experimental results persist, in particular for K. When considering the seal inlet corner as round, the CFD model produces a significant reduction in K to better approach the test result for a seal supplied with air. Attention to the seal geometry is paramount to produce accurate predictions.
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Yook, Sunmin, Gabseong Lee, Sang-Joon Yoon, Jae-Yong Park et Dong-Hoon Choi. « Reliability-Based Design Optimization Using Enhanced Dimension Reduction Method With Variable Sampling Points ». Dans ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87268.
Texte intégralRésumé :
Reliability-Based Design Optimization (RBDO) is an effective method to handle an optimization problem constrained by reliability performance. In spite of its great benefits, one of the most challenging issues for implementing RBDO is associated with very intensive computational demands of Reliability Analysis (RA). Moreover, an accurate and efficient RA method is indispensible to apply RBDO to practical engineering design problems. Among various RA methods, an enhanced Dimension Reduction (eDR) method is the most popular one due to the high computational efficiency. It is very desirable to obtain an accurate and efficient RA result by using the minimum number of sampling points. But, it is difficult to determine it. That is because it depends on the nonlinearity of a constraint from approximating a model and the degree of uncertainty from integrating a design factor. In this research, eDR method with variable sampling points has been studied and proposed to resolve the early mentioned difficulties. The main idea of the suggested method is to employ a different number of axial sampling points for each random design factor. It is according to the nonlinearity of a constraint and the degree of uncertainty of each random design factor. For each random variable, it begins to use three points first and decides to stop or increase the axial sampling points based upon the proposed criteria in this study. In case of increasing sampling points, it is incremented by one sampling point and ended up five sampling points at most. As it shown in the result, the efficiency of eDR method with variable sampling points for each random variable is superior to the one with fixed sampling points without sacrificing any accuracy. Through the three representative RA problems, it is verified that the proposed RA method generates the result 26.5% more efficiently on average than the conventional eDR method with fixed sampling points. Furthermore, the Performance Measure Approach (PMA) was used to evaluate the performance of RBDO using the new RA method. For the comparison, three mathematical and one engineering RBDO problems were solved by both eDR method with variable sampling points and conventional one with fixed sampling points. Finally, the comparison results clearly demonstrate that RBDO using the suggested RA method is superior to the conventional one in terms of accuracy and efficiency.