Micro-reactors, enabling continuous processes at small scales, have been of growing interest due to their advantage over batch. These advantages include better scaling, as well as improved mass and heat transfer, though many new challenges arise due to the small scales involved such as non-negligible entrance effects and significant pressure drops. The flow in coils, rectangular channel serpentine plates, mix-and-reside plates, and complex liquid-liquid mixing plates was investigated and characterized using residence time distribution (RTD) tests. A pulse test was used to determine the RTD curve shape of these reactors at flowrates ranging from 20 to 100 g/min. A semi-empirical, multi-parameter model was used to describe the asymmetrical curves, while the axial dispersion model was used to describe the symmetrical ones. The Peclet number is given in function of the Reynolds number for the liquid-liquid plates that were found to be near-plug flow (Pe > 100). In a continuous mixing plate, the Pe ranged from 190 to 475 with Pe increasing as Re increased. The effect of straight channel sections in micro-reactors is also evaluated. Longer straight segments between micromixers resulted in the development of unidirectional flow and the occurrence of tailing in the RTD. Finally, the suitability of a liquid-liquid plate for a reactive liquid-solid system is evaluated. The plugging is determined visually and by measuring pressure increase; pressure started to increase after 5 minutes and the experiment had to be halted after 10 minutes due to plugging. Parallels between the particle size distribution and the residence time distribution curves are drawn. The particle size distribution of silver chloride at low flow rates is much wider than at high flowrates. The average particle size at high flowrates was also much lower (≈69nm) than at low flowrates (≈112nm).

The comparison of the legal status of citizens, foreigners and asylum seekers in the Czech Republic - resume This thesis deals with the legislation status of citizens, foreigners and asylum seekers in the Czech Republic and its comparison. Gradually defines the various concept, discusses the legal rules, Czech and international also, mentions the most important source of law, fundamental judicial decisions, the prospect of new regulations and the legal status of holders of various statuses. The final and the most important chapter identify the similarities and differences in the legal status of the most important, respectively most discussed areas. The main objective is to streamline the often-fragmented provisions, define the individual terms and describe the most important similarities and differences in the legal status of citizens, foreigners and asylum seekers with an emphasis on Czech legislation.

M.Ed. / Please refer to full text to view abstract

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The potential for improved selectivity has made column flotation cells a popular choice for upgrading fine coal. Unfortunately, recent production data from full-scale column plants indicate that many industrial installations have failed to meet original expectations in terms of clean coal recovery. Theoretical studies performed using a simple dispersion model showed that this inherent shortcoming could be largely minimized by reconfiguring the columns to operate in series as a cell-to-cell circuit. Follow-up field data showed that this low-cost modification increased flotation recovery as predicted by the dispersion model. This study presents the key findings obtained from the field investigation and provides generic guidelines for designing multi-stage column circuits. / Master of Science

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Campus crisis responders are critical to ensuring the safety of students on a college campus. However, attrition in student affairs and specifically in the field of residence life (the department that most professionals that serve in an on-call rotation would fall under), continues to be a concern (Marshall et al., 2016). I assert that burnout of staff members in these roles is a large part of the problem and that managers can ameliorate some of that burnout by controlling specific job factors for those who serve as campus crisis responders. I conducted a quantitative study using an anonymous survey on the Qualtrics platform that was distributed to staff members who serve as campus crisis responders at institutions of higher education. I primarily utilized professional Facebook groups related to Housing and residence life or student affairs in addition to professional email listserves to elicit participants. The effective sample size was 233 and participants were all individuals who serve in an on-call rotation on a college campus. The survey instrument was comprised of demographic questions, as well as questions from the Live-In/Live-On Report (Horowitz 1997) and the Copenhagen Burnout Inventory (Kristensen et al., 2005). Findings suggest that while participants who identified as female had a significantly higher rate of burnout than those who identified as male, there were no job factors that significantly affected the burnout rate of these staff members. The overall burnout rate of campus crisis responders, however, is significantly higher than that of other populations measured by the Copenhagen Burnout Inventory. With that in mind, hiring managers for campus crisis responders should look at the overall issue of burnout in their staff to address issues of attrition. Future research should include looking at staff and supervisor support, and organizational culture. / Educational Leadership