67 research outputs found
CSR and leadership approaches and practices: a comparative inquiry of owners and professional executives
Get PDFThis study generates comparative insights into CSR approaches of owners and non-kin professional executives in an emerging country context, Turkey. Drawing on 61 interviews, we found that ownership status of the executive is crucial in shaping their CSR perceptions and practices. Owner-executives are empowered in pursuing CSR approaches based on their personal preferences and values; they have mostly societal aims. Professionals display tendency for company-related CSR practice; they exhibit greater knowledge of CSR, and their CSR initiatives are the results of strategic choices to enhance their power within the corporation. Our paper contributes to the debate on the drivers for CSR by accounting for both societal and individual influences on the CSR agency of these two key groups of executives. First, we develop a typology of CSR approaches of owners and professionals. Second, we provide insights from an emerging country context. Third, we present empirically grounded practice implications for CSR. <br/
Understanding the Agency of Diversity Managers: A Relational and Multilevel Investigation.
No full textPhDThis thesis aims to provide a critical realist account of diversity managers' agency,
incorporating a critique of the existing diversity management research. A multilevel and
relational analytical framework is offered in order to understand diversity managers'
agency. The framework interpreted and operationalised Bourdieu's key concepts,
`field', `habitus', `capitals' and `strategies' in the organisational context, for exploring
and explaining macro, meso and micro level influences on the agency of diversity
managers.
The macro-social field of diversity management is mapped out by analysing data from
an online national survey completed by diversity managers in the UK, and in-depth
interviews with diversity managers of large public and private sector organisations.
Then, findings of an extensive case study of Ford Motor Company, which includes
company documentation and interviews with the company's diversity managers, are
introduced to examine meso-organisational and micro-individual dynamics of diversity
managers' agency.
The analysis of the findings revealed that the agency of diversity managers is
multilayered and complex. Whilst the boundaries of this agency are drawn by the deeply
seated structures and mechanisms which are embedded in the fabric of social and
organisational lives, diversity managers own varying degrees of social, cultural and
symbolic capitals which are potential sources of power and influence, and they utilise
strategies in order to activate this potential and widen the scope of their agency.
The thesis addresses the limitations in diversity management literature, which are
associated with dualisms of agency and structure, and qualitative and quantitative
methods. It makes theoretical and methodological contribution by offering original
empirical evidence generated through a multi-method strategy and analysing diversity
managers' agency at the interplay of agentic and structural dynamics. It also offers
policy makers at organisational and national levels a realistic understanding of diversity
management processes that may inform design of more effective and progressive
policies and initiatives.School of Business and Management Queen Mary University
First phase passive heat removal facility (PHRF) experiments for westinghouse LFR
No full textThe Westinghouse Lead Fast Reactor (LFR) is a 450 MWe class, lead-cooled, fast neutron spectrum, pool-type reactor with passive safety systems. Its mission is to best complement Light Water Reactors (LWR) in the mid- to long-term by providing enhanced application versatility for global markets while targeting cost-effective deployment. The passive heat removal system (PHRS) is the emergency decay heat removal system of this advanced plant. A distinctive feature of the PHRS that it is always on, and does not require any operator intervention, signals of intelligence or moving is parts for the actuation and operation, consistent with the IAEA passive safety category B. The system initially removes heat through water boiling and subsequently transitions to (indefinite) air cooling. To assess the performance of the PHRS and provide experimental data for the verification and validation of modeling and simulation tools, the passive heat removal facility (PHRF) has been built at the Ansaldo Nuclear’s site in Wolverhampton, UK, with the support from the United Kingdom Government and international partners. The PHRF is a full-height separate effects test facility that follows the power-to-volume scaling rule to maximize its prototypicality. The test matrix of the first phase of testing included both air cooling tests and transition tests from water cooling to air cooling. A significant amount of experimental data has been generated in the first phase of testing, confirming the performance of the PHRS both in air cooling mode and during the transition from water cooling to air cooling
The passive heat removal facility (PHRF) and its first phase experiments
No full textThe Westinghouse Lead Fast Reactor (LFR) is a 450 MWe class, lead-cooled, fast neutron spectrum, pool-type reactor with passive safety systems. The passive heat removal system (PHRS) is the emergency decay heat removal system of this LFR. A distinctive feature of the PHRS is that it is always on, and does not require any operator intervention, signals of intelligence or moving parts for the actuation and operation, consistent with the IAEA passive safety category B. The system initially removes heat through water boiling and subsequently transitions to (indefinite) air cooling. To assess the performance of the PHRS and provide experimental data for the verification and validation of modeling and simulation tools, the passive heat removal facility (PHRF) has been built at the Ansaldo Nuclear's site in Wolverhampton, UK, with the support from the United Kingdom Government and international partners. The PHRF is a full-height separate effects test facility that follows the power-to-volume scaling rule to maximize its prototypicality. The test matrix of the first phase of testing included both air cooling tests and transition tests from water cooling to air cooling. A significant amount of experimental data were generated in the first phase of testing, confirming the performance of the PHRS both in air cooling mode and during the transition from water cooling to air cooling
One-dimensional transient numerical modeling of a micro-power generation system
Get PDFTwo core modules of a more comprehensive model for analyzing the flow of fluids in a hybrid system including a fuel cell are developed. First part consists of a new procedure for scaling turbomachinery maps. In the last few decades, the sizes of turbomachinery have been getting smaller and smaller for various purposes. New designs have pushed the limits of power generation to be in more compact sizes, which lead to smaller compressors and turbines. For new designs, it is important to know how the turbomachinery in the system will behave at certain conditions. But it is not practical to build a turbomachinery during the design process since there might be changes in the configuration of the system afterwards and it is a very costly procedure. It is also a very time consuming process to obtain experimental data for off design conditions. What is usually done is to use similar sized turbomachinery maps to predict the behavior of the system with reasonable approximations. This method provides better estimates with much less cost.;Second part introduces a transient one-dimensional numerical model of the flow in pipes. The program uses the projection method to solve for the variables in a transient 1-D compressible flow system in a variable cross-sectional duct with friction and heat transfer. This model is verified through comparison with the analytical solutions of various flows. It gives very accurate results for any type of flow including unsteady flows with friction and heat transfer. A case study of flow through a combustion chamber is also presented
Pretreatment of peanut shells for co-production of glucose and concrete admixture
No full textThis thesis work aims the ionic liquid pretreatment of peanut shells for co-production of glucose as fermentable sugar and lignin, considering a multi product perspective. The effects of ionic liquid type and pretreatment time period on the sugar and lignin yields were investigated, as the particle size and temperature parameters were determined in the preliminary studies. Peanut shells were pretreated at constant temperature, 150 oC, for 5, 15 and 30 minutes with 1-ethyl-3-methylimidazolium acetate and for 15, 30 and 60 minutes with 1-ethyl-3-methylimidazolium chloride. The pretreated peanut shells were then subjected to enzymatic hydrolysis in order to produce fermentable sugars, mostly, glucose. The solid residue obtained upon enzymatic hydrolysis was analyzed in terms of lignin quantity. 1-ethyl-3-methylimidazolium acetate pretreatment for 15 minutes resulted in the maximum reducing sugar and lignin yields; 28 g of reducing sugar and 20 g of solid residue with 70% lignin were obtained per 100 g of peanut shells. Higher pretreatment time resulted in lower yields. Moreover, no optimal time period for 1-ethyl-3- methylimidazolium chloride pretreatment was obtained, since reducing sugar and lignin yields increased as the time period increased. Also all reducing sugar and lignin yields were lower than that obtained with 1-ethyl-3-methylimidazolium acetate. Lignin obtained upon enzymatic hydrolysis of 1-ethyl-3-methylimidazolium acetate pretreated peanut shells were characterized by SEM, FTIR, TGA and XRD analyses, which also showed the morphological and structural effects of pretreatment and enzymatic hydrolysis on peanut shells; and used as concrete admixture, which increased the flow of the concrete by 6%
A study to develop clinical decision rules for the use of radiography in wrist trauma: Karadeniz wrist rules
No full textBAYDIN, AHMET/0000-0003-4987-0878; Tatli, Ozgur/0000-0003-0263-7630; Turedi, Suleyman/0000-0002-6500-3961Introduction: The aim of this study was to evaluate patients presenting to the emergency department (ED) with wrist trauma using physical examination findings and functional tests and to identify findings with high sensitivity and specificity among the parameters assessed in patients with fracture in the wrist. The ultimate objective was thus to establish a reliable and widely usable clinical decision rule for determining the necessity of radiography in wrist trauma. Methods: This prospective, multicenter study was performed in 8 hospitals. The relation between radiologically determined fracture and clinical findings consisting of physical examination findings and functional tests was assessed in terms of whether or not these were markers of radiography requirement, with the aim of identifying predictive values for fracture. Results: A total of 603 eligible trauma patients presented to the participating EDs during the study period. Fracture was identified in 24.5% of patients (n= 148). The 4-way combination with the highest sensitivity was identified as axial compression and the positive distal radioulnar drawer test, and pain with radial deviation and dorsal flexion. Sensitivity at distal ulna palpation was added as a fifth parameter, and sensitivity and negative predictive value thus increased to 100%. Conclusion: With their 100% sensitivity and 100% negative predictive values, the Karadeniz wrist rules may represent a clinical decision rule that can be used in practice in EDs. If all 5 findings are negative, there is no indication for wrist radiography. (C) 2016 Elsevier Inc. All rights reserved
Gömülü üçüncü molar diş operasyonunda piezoelektrik kemik cerrahisi ve geleneksel döner enstrümanların karşılaştırılması
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