TY - THES A1 - Lohmann, Michael T1 - Medienorientierung und innerparteiliche Machtkämpfe : Gründe und Verläufe innerparteilicher Machtkämpfe am Beispiel der unerwarteten Kampfkandidatur um den Parteivorsitz auf dem Mannheimer SPD-Parteitag 1995 T1 - Media focus and inner-party power struggles : reasons and courses of inner-party power struggles ; the example of the unexpected combat candidacy for the chairmanship at the SPD party convention in Mannheim 1995 N2 - Üblicherweise vermeiden deutsche Parteien Kampfkandidaturen um den Vorsitz. Dennoch kam es auf dem Mannheimer SPD-Parteitag 1995 zu einer unerwarteten offenen Konkurrenz um das Spitzenamt. Das unbeabsichtigte Scheitern der Inszenierung der „Geschlossenheit“ der Partei führte zum Ausbruch der bis dahin unterdrückten Kämpfe um den Parteivorsitz. Der Mannheimer Parteitag steht exemplarisch für den Zusammenhang zwischen Inszenierung, Disziplin und den informellen Regeln innerparteilicher Machtkonstruktion. Am Beispiel dieses Parteitages zeigt die vorliegende Arbeit, wie umstrittenen Parteivorsitzenden sich gegen Widerstände im Amt behaupten können bzw. woran diese Strategie scheitern kann. Aus figurationstheoretischer Perspektive wird die Inszenierung als Notwendigkeit medienvermittelter Parteienkonkurrenz um Wählerstimmen gefasst. Inszenierung erfordert Selbstdisziplin und das koordinierte Handeln der Parteimitglieder. Innerparteilich wird so wechselseitige Abhängigkeit erzeugt. Diese wird gesteigert durch die Medien-Konzentration auf wenige Spitzenpolitiker. Die Mehrheit der Mandatsträger und Funktionäre ist angewiesen auf das medienwirksame Auftreten der Führung. Für den Medienerfolg braucht die Führung ihrerseits die Unterstützung der Mitglieder. Diese wechselseitige Abhängigkeit erzeugt sowohl typische Relevanzen als auch Möglichkeiten, die jeweils andere Interessengruppe unter Zugzwang zu setzen. Imageprobleme des Vorsitzenden sind als verletzte Erwartungen Anlass für innerparteiliche Machtkämpfe, in denen die Parteiführung insbesondere die Inszenierung der „Geschlossenheit“ nutzen kann, um offene Personaldiskussionen zu verhindern. Da Handlungsoptionen und -grenzen durch das Handeln der Akteure immer wieder neu geschaffen werden, besteht stets das Risiko des Scheiterns innerparteilicher Disziplinierung. Mit dem Nachvollzug von Disziplinierung und den Gründen ihrer Kontingenz versteht sich die vorliegende Arbeit als Beitrag zu einer Theorie informeller Machtregeln in Organisationen mit schwach ausgeprägten Herrschaftsstrukturen. Im ersten Teil der Arbeit wird der Zusammenhang zwischen Inszenierung und Macht durch die Konzepte Theatralität und Figuration entwickelt. Im zweiten Teil werden typische Konstellationen der gegenwärtigen parlamentarischen Demokratie auf typische beziehungsvermittelte Situationsdeutungen, Handlungsmöglichkeiten und -grenzen untersucht. Im dritten Teil wird der kontingente Prozess des innerparteilichen Machtkampfes am Beispiel des Mannheimer Parteitages 1995 nachvollzogen. N2 - Usually german parties avoid crucial votes for chairmanship. Nevertheless 1995 on the Mannheim SPD party convention an unexpected open competition for leading position has happened. Because of unintended failure of the staging “cohesion” and “harmony” of the party repressed fights for the party leadership broke out suddenly. The Mannheim party convention is an example for the connection of staging, discipline and unexpressed rules of construction of power within the party. On the example of this party convention this doctoral thesis shows how contested party leaders maintain their position against the resistance of critics. This thesis also shows why this strategy could fail. In the perspective of figurational sociology staging is necessary for political parties because parties compete with others for electors votes and their campaigns depend from the media. Staging needs self-discipline and a coordinated acting of party members. This causes a mutual dependence of party members which increases through the concentration of media on a few top-ranking politicians. So the majority of members of parliament and officials depends on the public acting of these small group of leaders and their reception in the media. On the other hands side for a successful medial self staging leaders need support of their members. This mutual dependence generates typical relevance as well as posibilities to force the respective opponents hand. Problems of public image of the chairman cause internal power struggles, in this struggles the party leadership uses the staging of “cohesion” and “harmony” to avoid open personnel discussions.This strategy of keeping discipline of members acting can fail because in relations of mutual dependence protagonists create options and restrictions of acting for each other. By comprehending the disciplinary action and the reasons of their contingency this doctoral thesis is a contribution to a theory of informal rules of power in organisations with weak distinct structures of authority.The first part of this work developes the connection of staging and power through concepts of theatricality and figuration.The second part analyzes the typical constellations of present parliamentary democracy and the way these relations cause specific perceptions of situation, options and restriction of acting. The third part comprehends the kontingental prozess of the party infighting using the example of the 1995 Mannheim party convention. KW - Partei KW - politische Soziologie KW - Machtkampf KW - Inszenierung KW - Organisationstheorie KW - political parties KW - political sociology KW - power struggles KW - inscenation KW - organizational theory Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-71245 ER - TY - GEN A1 - Dettmann, Sophie A1 - Huittinen, Nina Maria A1 - Jahn, Nicolas A1 - Kretzschmar, Jerome A1 - Kumke, Michael A1 - Kutyma, Tamara A1 - Lohmann, Janik A1 - Reich, Tobias A1 - Schmeide, Katja A1 - Azzam, Salim Shams Aldin A1 - Spittler, Leon A1 - Stietz, Janina T1 - Influence of gluconate on the retention of Eu(III), Am(III), Th(IV), Pu(IV), and U(VI) by C-S-H (C/S = 0.8) T2 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - The retention of actinides in different oxidation states (An(X), X = III, IV, VI) by a calcium-silicate-hydrate (C-S-H) phase with a Ca/Si (C/S) ratio of 0.8 was investigated in the presence of gluconate (GLU). The actinides considered were Am(III), Th(IV), Pu(IV), and U(VI). Eu(III) was investigated as chemical analogue for Am(III) and Cm(III). In addition to the ternary systems An(X)/GLU/C-S-H, also binary systems An(X)/C-S-H, GLU/C-S-H, and An(X)/GLU were studied. Complementary analytical techniques were applied to address the different specific aspects of the binary and ternary systems. Time-resolved laser-induced luminescence spectroscopy (TRLFS) was applied in combination with parallel factor analysis (PARAFAC) to identify retained species and to monitor species-selective sorption kinetics. ¹³C and ²⁹Si magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were applied to determine the bulk structure and the composition of the C-S-H surface, respectively, in the absence and presence of GLU. The interaction of Th(IV) with GLU in different electrolytes was studied by capillary electrophoresis-inductively coupled plasma mass spectrometry (CE-ICP-MS). The influence of GLU on An(X) retention was investigated for a large concentration range up to 10⁻² M. The results showed that GLU had little to no effect on the overall An(X) retention by C-S-H with C/S of 0.8, regardless of the oxidation state of the actinides. For Eu(III), the TRLFS investigations additionally implied the formation of a Eu(III)-bearing precipitate with dissolved constituents of the C-S-H phase, which becomes structurally altered by the presence of GLU. For U(VI) sorption on the C-S-H phase, only a small influence of GLU could be established in the luminescence spectroscopic investigations, and no precipitation of U(VI)-containing secondary phases could be identified. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1318 KW - actinide, organic ligand, sorption, cementitious material, concrete, luminescence KW - organic ligand KW - sorption KW - cementitious material KW - concrete KW - luminescence Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-588455 SN - 1866-8372 IS - 1318 ER - TY - JOUR A1 - Dettmann, Sophie A1 - Huittinen, Nina Maria A1 - Nicolas, Jahn A1 - Kretzschmar, Jerome A1 - Kumke, Michael A1 - Kutyma, Tamara A1 - Lohmann, Janik A1 - Reich, Tobias A1 - Schmeide, Katja A1 - Azzam, Salim Shams Aldin A1 - Spittler, Leon A1 - Stietz, Janina T1 - Influence of gluconate on the retention of Eu(III), Am(III), Th(IV), Pu(IV), and U(VI) by C-S-H (C/S = 0.8) JF - Frontiers in Nuclear Engineering N2 - The retention of actinides in different oxidation states (An(X), X = III, IV, VI) by a calcium-silicate-hydrate (C-S-H) phase with a Ca/Si (C/S) ratio of 0.8 was investigated in the presence of gluconate (GLU). The actinides considered were Am(III), Th(IV), Pu(IV), and U(VI). Eu(III) was investigated as chemical analogue for Am(III) and Cm(III). In addition to the ternary systems An(X)/GLU/C-S-H, also binary systems An(X)/C-S-H, GLU/C-S-H, and An(X)/GLU were studied. Complementary analytical techniques were applied to address the different specific aspects of the binary and ternary systems. Time-resolved laser-induced luminescence spectroscopy (TRLFS) was applied in combination with parallel factor analysis (PARAFAC) to identify retained species and to monitor species-selective sorption kinetics. ¹³C and ²⁹Si magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were applied to determine the bulk structure and the composition of the C-S-H surface, respectively, in the absence and presence of GLU. The interaction of Th(IV) with GLU in different electrolytes was studied by capillary electrophoresis-inductively coupled plasma mass spectrometry (CE-ICP-MS). The influence of GLU on An(X) retention was investigated for a large concentration range up to 10⁻² M. The results showed that GLU had little to no effect on the overall An(X) retention by C-S-H with C/S of 0.8, regardless of the oxidation state of the actinides. For Eu(III), the TRLFS investigations additionally implied the formation of a Eu(III)-bearing precipitate with dissolved constituents of the C-S-H phase, which becomes structurally altered by the presence of GLU. For U(VI) sorption on the C-S-H phase, only a small influence of GLU could be established in the luminescence spectroscopic investigations, and no precipitation of U(VI)-containing secondary phases could be identified. KW - actinide KW - organic ligand KW - sorption KW - cementitious material KW - concrete KW - luminescence Y1 - 2023 U6 - https://doi.org/10.3389/fnuen.2023.1124856 SN - 2813-3412 VL - 2 PB - Frontiers Media CY - Lausanne ER - TY - JOUR A1 - Falk, Thomas A1 - Kirk, Michael A1 - Lohmann, Dirk A1 - Kruger, Bertus A1 - Hüttich, Christian A1 - Kamukuenjandje, Richard T1 - The profits of excludability and transferability in redistributive land reform in central Namibia JF - Development Southern Africa N2 - Policies which redistribute property rights to land can improve the well-being of rural households and can have overall growth effects. In many cases, however, land reforms are driven mainly by politically justified objectives. Under such circumstances, little emphasis is placed on whether and, if so, how property rights can increase productivity. Following 18 years of land reform implementation in Namibia, we evaluated 65 beneficiaries in Namibia. We assess to which degree land rights affects their farm income. The study focuses on Namibia’s two main commercial land reform instruments, namely the Farm Unit Resettlement Scheme and the Affirmative Action Loan Scheme. We find evidence that the majority of land reform projects are not profitable. Further, our study confirms the importance of the right to restrict land access compared with the right to transfer. The long-term leasehold contract seemingly provides sufficient incentives to make productive use of the land. KW - Redistributive land reform KW - property rights KW - farm productivity KW - pastoralism KW - Namibia Y1 - 2017 U6 - https://doi.org/10.1080/0376835X.2016.1269633 SN - 0376-835X SN - 1470-3637 VL - 34 SP - 314 EP - 329 PB - Routledge, Taylor & Francis Group CY - Abingdon ER - TY - JOUR A1 - Lohmann, Daniel A1 - Stacey, Nicola A1 - Breuninger, Holger A1 - Jikumaru, Yusuke A1 - Müller, Dörte A1 - Sicard, Adrien A1 - Leyser, Ottoline A1 - Yamaguchi, Shinjiro A1 - Lenhard, Michael T1 - SLOW MOTION is required for within-plant auxin homeostasis and normal timing of lateral organ initiation at the shoot meristem in Arabidopsis Y1 - 2010 SN - 1040-4651 ER -