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61	Politisches Handeln. Zum Verhältnis von Zielorientierung und Collective Agency Möller, Kolja, Schink, Philipp 19 March 2024 (has links) Der Beitrag geht dem Verhältnis von Zielen und Collective Agency im politischen Handeln nach. Dabei wird die These entwickelt, dass das unmittelbare Erfahren und Gestalten von gemeinsamen Handlungsverhältnissen die Zielorientierung in der Politik nicht ersetzen kann, sondern als eine wichtige Bestandsbedingung des politischen Handelns zu verstehen ist. Ausgangspunkt sind dabei Positionen, wie sie in der politischen Theorie bisher am deutlichsten von Hannah Arendt vertreten wurden und in unserer Gegenwart insbesondere in neuen sozialen Bewegungen verbreitet sind: Diesen zufolge besteht der Kern politischen Handelns in der Erfahrung einer Collective Agency. Der Beitrag rekonstruiert diesen Zugriff anhand der Schriften Hannah Arendts und verortet ihn im Umfeld bestehender Theorieansätze sowie von Erkenntnissen der Aufstands- und Rebellionsforschung. Schließlich werden handlungstheoretische Überlegungen angestellt (u. a. im Hinblick auf die Unterscheidung zwischen Haupt- und Nebenprodukten und die Zweistufigkeit in Handlungsprozessen). Sie laufen darauf hinaus, die Collective Agency in eine komplexere Zielorientierung aufzunehmen. Dadurch ergibt sich eine Korrektur sowohl instrumenteller Politikverständnisse als auch von Theorien, die den Sinn von Politik im Vollzug der Handlungsprozesse selbst ansiedeln. / The article explores the relationship between goals and collective agency in political action. It is argued that the experience and shaping of collective agency cannot replace goal orientation in politics, but must be understood as a resilience condition for the existence of political action. First, the article critically discusses theories of political action that are centered on collective agency. The article then reconstructs this approach from Hannah Arendt’s writings and places it in the context of existing theoretical approaches as well as insights from research on insurgency and rebellion. Finally, reflections are made on how to improve the modeling of political action. Here, among other things, the distinction between main and by-products and the two-stage nature of political action are important. These reflections then allow for incorporating collective agency into a more complex goal orientation. This, in turn, leads to a correction of approaches centered on both instrumental and collective agency. info:eu-repo/classification/ddc/320 ddc:320
62	Cultural and attitudinal influences on destination choice / Einflüsse von Kultur und Einstellung auf die Wahl des Urlaubsziels Yan, Jiong 21 January 2008 (has links) No description available. 330 Wirtschaft Agricultural Sciences Wahl des Urlaubssziels Präferenzen Naturbilder Einstellung zu nachhaltigem Tourismus Südwest-China destination choice preference images of nature attitude toward sustainable tourism southwestern China Umweltökonomie)
63	Geld und Politik : die Finanzierung politischer Kampagnen im Spannungsfeld von Verfassung, Demokratie und politischem Willen / Caroni, Martina. January 2009 (has links) (PDF) Habil.-Schr. Univ. Bern, 2006. / Quellentext teilw. engl. Bibliogr.
64	Temporal delay discounting in acutely ill and weight-recovered patients with anorexia nervosa Ritschel, F., King, J. A., Geisler, D., Flohr, L., Neidel, F., Boehm, I., Seidel, M., Zwipp, J., Ripke, S., Smolka, M. N., Roessner, V., Ehrlich, S. 11 June 2020 (has links) Background. Patients with anorexia nervosa (AN) are characterized by a very low body weight but readily give up immediate rewards (food) for long-term goals (slim figure), which might indicate an unusual level of self-control. This everyday clinical observation may be quantifiable in the framework of the anticipation-discounting dilemma. Method. Using a cross-sectional design, this study compared the capacity to delay reward in 34 patients suffering from acute AN (acAN), 33 weight-recovered AN patients (recAN) and 54 healthy controls. We also used a longitudinal study to reassess 21 acAN patients after short-term weight restoration. A validated intertemporal choice task and a hyperbolic model were used to estimate temporal discounting rates. Results. Confirming the validity of the task used, decreased delay discounting was associated with age and low selfreported impulsivity. However, no group differences in key measures of temporal discounting of monetary rewards were found. Conclusions. Increased cognitive control, which has been suggested as a key characteristic of AN, does not seem to extend the capacity to wait for delayed monetary rewards. Differences between our study and the only previous study reporting decreased delay discounting in adult AN patients may be explained by the different age range and chronicity of acute patients, but the fact that weight recovery was not associated with changes in discount rates suggests that discounting behavior is not a trait marker in AN. Future studies using paradigms with disorder-specific stimuli may help to clarify the role of delay discounting in AN. info:eu-repo/classification/ddc/610 ddc:610
65	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>
66	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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