Global ETD Search

31	The Bridging Education and Licensure of International Medical Doctors in Ontario: A Call for Commitment, Consistency, and Transparency Peters, Colette 11 January 2012 (has links) The widely acknowledged doctor shortage in Canada has recently motivated a more critical look at the licensure rates of International Medical Doctors (IMDs), also known as International Medical Graduates (IMGs). However, very little research has been conducted on the experiences of IMDs before they enter the Canadian medical system. This qualitative study collected interview data from 15 diverse IMDs seeking licensure in Ontario, Canada. The participants varied with respect to age, country of origin, English language proficiency on arrival, and time in Canada. In addition, two bridging support programs were observed, and interviews were conducted with three educators from the programs. The interviews were analysed using thematic content analysis (Boyatzis, 1998; Miles & Huberman, 1994). An analysis of metaphors used by the IMDs to describe their experiences during the licensing process supported the use of poetic representation for key findings, resulting in three poems that are interspersed in the body of the thesis (Ellingson, 2011; Glesne, 1997; Richardson, 2002; Richardson & Adams St. Pierre, 2005). The theoretical framework of the research was informed by Vygotskian Sociocultural Theory, which views learning as inseparable from social interaction and context (Vygotsky, 1987). Third-generation Activity Theory (AT), which has descended from Vygotsky’s work, was applied to highlight the higher-level systemic issues related to medical licensing. Results of this study indicate that IMDs with lower English proficiency face substantial difficulties on arrival, with limited access to the type of medically-relevant language instruction needed to support them. In fact, all pre-licensure IMDs struggle to access the interactional learning opportunities (i.e., Vygotskian “mediational means”) to support their entry into the system. Licensing challenges include limited exam preparation resources that support acquisition of Canadian cultural content; unequal access to clinical observerships; and a selection process which lacks transparency and emphasizes a screening tool unfamiliar to IMDs, the residency interview. Implications of this study include the revisiting of immigration policy; increasing the transparency and effectiveness of the selection process/residency interview; reviewing the role of clinical observerships in the selection process and exploring the potential of observerships to function as a licensure portfolio assessment. international medical doctors international medical graduates IMGs immigrant bridging education personnel selection: methods interviews as topic certification education Canada licensure internationally educated professionals poetry poetic representation communication residency interview foreign medical graduates qualitative research physicians english language proficiency Vygotskian sociocultural theory L. Vygotsky activity theory 0282 0516 0339
32	The Bridging Education and Licensure of International Medical Doctors in Ontario: A Call for Commitment, Consistency, and Transparency Peters, Colette 11 January 2012 (has links) The widely acknowledged doctor shortage in Canada has recently motivated a more critical look at the licensure rates of International Medical Doctors (IMDs), also known as International Medical Graduates (IMGs). However, very little research has been conducted on the experiences of IMDs before they enter the Canadian medical system. This qualitative study collected interview data from 15 diverse IMDs seeking licensure in Ontario, Canada. The participants varied with respect to age, country of origin, English language proficiency on arrival, and time in Canada. In addition, two bridging support programs were observed, and interviews were conducted with three educators from the programs. The interviews were analysed using thematic content analysis (Boyatzis, 1998; Miles & Huberman, 1994). An analysis of metaphors used by the IMDs to describe their experiences during the licensing process supported the use of poetic representation for key findings, resulting in three poems that are interspersed in the body of the thesis (Ellingson, 2011; Glesne, 1997; Richardson, 2002; Richardson & Adams St. Pierre, 2005). The theoretical framework of the research was informed by Vygotskian Sociocultural Theory, which views learning as inseparable from social interaction and context (Vygotsky, 1987). Third-generation Activity Theory (AT), which has descended from Vygotsky’s work, was applied to highlight the higher-level systemic issues related to medical licensing. Results of this study indicate that IMDs with lower English proficiency face substantial difficulties on arrival, with limited access to the type of medically-relevant language instruction needed to support them. In fact, all pre-licensure IMDs struggle to access the interactional learning opportunities (i.e., Vygotskian “mediational means”) to support their entry into the system. Licensing challenges include limited exam preparation resources that support acquisition of Canadian cultural content; unequal access to clinical observerships; and a selection process which lacks transparency and emphasizes a screening tool unfamiliar to IMDs, the residency interview. Implications of this study include the revisiting of immigration policy; increasing the transparency and effectiveness of the selection process/residency interview; reviewing the role of clinical observerships in the selection process and exploring the potential of observerships to function as a licensure portfolio assessment. international medical doctors international medical graduates IMGs immigrant bridging education personnel selection: methods interviews as topic certification education Canada licensure internationally educated professionals poetry poetic representation communication residency interview foreign medical graduates qualitative research physicians english language proficiency Vygotskian sociocultural theory L. Vygotsky activity theory 0282 0516 0339
33	Studies on two specific inverse problems from imaging and finance Rückert, Nadja 20 July 2012 (has links) (PDF) This thesis deals with regularization parameter selection methods in the context of Tikhonov-type regularization with Poisson distributed data, in particular the reconstruction of images, as well as with the identiﬁcation of the volatility surface from observed option prices. In Part I we examine the choice of the regularization parameter when reconstructing an image, which is disturbed by Poisson noise, with Tikhonov-type regularization. This type of regularization is a generalization of the classical Tikhonov regularization in the Banach space setting and often called variational regularization. After a general consideration of Tikhonov-type regularization for data corrupted by Poisson noise, we examine the methods for choosing the regularization parameter numerically on the basis of two test images and real PET data. In Part II we consider the estimation of the volatility function from observed call option prices with the explicit formula which has been derived by Dupire using the Black-Scholes partial diﬀerential equation. The option prices are only available as discrete noisy observations so that the main diﬃculty is the ill-posedness of the numerical diﬀerentiation. Finite diﬀerence schemes, as regularization by discretization of the inverse and ill-posed problem, do not overcome these diﬃculties when they are used to evaluate the partial derivatives. Therefore we construct an alternative algorithm based on the weak formulation of the dual Black-Scholes partial diﬀerential equation and evaluate the performance of the ﬁnite diﬀerence schemes and the new algorithm for synthetic and real option prices. Tikhonov-Regularisierung Kullback-Leibler Totale Variation Poissonverteilte Daten Bildverarbeitung Wahl des Regularisierungsparameters Diskrepanzprinzip L-Kurve Quasi-Optimalitätskriterium PET Black-Scholes-Modell Volatilität Dupire Call-Option Regularisierung durch Diskretisierung Parameter Identifikationsalgorithmus Tikhonov-Regularization Kullback-Leibler Total Variation Poisson distributed data discrepancy principle L-curve method quasi-optimality criterion PET Black-Scholes model volatility Dupire call option regularization by discretization imaging finance ddc:515 ddc:519 Tichonov-Regularisierung Black-Scholes-Modell Volatilität Regularisierungsverfahren Poisson-Verteilung Bildverarbeitung Call-Option Parameter <Mathematik>
34	Studies on two specific inverse problems from imaging and finance Rückert, Nadja 16 July 2012 (has links) This thesis deals with regularization parameter selection methods in the context of Tikhonov-type regularization with Poisson distributed data, in particular the reconstruction of images, as well as with the identiﬁcation of the volatility surface from observed option prices. In Part I we examine the choice of the regularization parameter when reconstructing an image, which is disturbed by Poisson noise, with Tikhonov-type regularization. This type of regularization is a generalization of the classical Tikhonov regularization in the Banach space setting and often called variational regularization. After a general consideration of Tikhonov-type regularization for data corrupted by Poisson noise, we examine the methods for choosing the regularization parameter numerically on the basis of two test images and real PET data. In Part II we consider the estimation of the volatility function from observed call option prices with the explicit formula which has been derived by Dupire using the Black-Scholes partial diﬀerential equation. The option prices are only available as discrete noisy observations so that the main diﬃculty is the ill-posedness of the numerical diﬀerentiation. Finite diﬀerence schemes, as regularization by discretization of the inverse and ill-posed problem, do not overcome these diﬃculties when they are used to evaluate the partial derivatives. Therefore we construct an alternative algorithm based on the weak formulation of the dual Black-Scholes partial diﬀerential equation and evaluate the performance of the ﬁnite diﬀerence schemes and the new algorithm for synthetic and real option prices. info:eu-repo/classification/ddc/515 ddc:515 info:eu-repo/classification/ddc/519 ddc:519

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