Yes / Adolescent sexual and reproductive health (SRH) remains a challenge globally. High school youths without comprehensive sexuality education (CSE) are more likely to engage in high risk sexual behaviors than their peers in schools with CSE. Fiji continues to have very poor adolescents SRH indicators. This study aimed to gauge the perceptions of students towards the delivery of SRH education in schools in Fiji. A qualitative study design was used to collect data from students in year 11-13 in public secondary schools in Suva, Fiji in 2018. Schools with equal ethnic mix were selected. A semi-structured open-ended questionnaire was used to guide Focus Group Discussions (FGDs). A male research facilitator conducted FGD with males while a female research facilitator facilitated that amongst the females. Data collected was analyzed thematically. Seven FGDs were conducted. A total of 46 students (29 males) participated with the age range from 17-19 years old. Eight themes emerged: current SRH education; students' knowledge on adverse consequences of SRH; sources of SRH information; need for sex education; provision of SRH education in schools; characteristics of teachers of SRH education; age-appropriate incremental sex education; and ideal version of SRH. The study shows that Fijian students desired a lot more from sex education than what is currently offered for sexual decision-making. There is a need for mandatory and comprehensive sex education for young people.

Several hydrides of Group 2 and 12 elements were generated in the gas phase using an emission source that combines an electrical discharge with a high temperature furnace, and their high-resolution infrared emission spectra were recorded with a Fourier transform spectrometer. Two classes of molecules were studied: <em>a)</em> diatomic metal hydrides BeH, MgH, CaH, SrH, ZnH and CdH; <em>b)</em> linear triatomic metal hydrides BeH₂, MgH₂, ZnH₂ and HgH₂. <br /><br /> Infrared emission spectra of BeH, MgH, CaH, SrH, ZnH and CdH free radicals contained several vibration-rotation bands in their ²SIGMA⁺ ground electronic state. The new data were combined with all the previous ground state data from diode laser infrared spectra and pure rotation spectra available in the literature. Spectroscopic constants, i. e. , vibrational band origins, rotational, centrifugal distortion, and spin-rotation interaction constants, were determined for each observed vibrational level by least-squares fitting of all the data. In addition, the data from all isotopologues were fitted simultaneously using the empirical Dunham-type energy level expression for ²SIGMA⁺ states, and correction parameters due to the breakdown of the Born-Oppenheimer approximation were determined. The equilibrium internuclear distances (<em>r</em>_e) of ⁹BeH, ²⁴MgH, ⁴⁰CaH, ⁸⁸SrH, ⁶⁴ZnH and ¹¹⁴CdH were determined to be 1. 342424(2), 1. 729721(1), 2. 002360(1), 2. 146057(1), 1. 593478(2) and 1. 760098(3) angstroms, respectively, and the corresponding <em>r</em>^e distances for ⁹BeD, ²⁴MgD, ⁴⁰CaD, ⁸⁸SrD, ⁶⁴ZnD and ¹¹⁴CdD are 1. 341731(2), 1. 729157(1), 2. 001462(1), 2. 145073(1), 1. 593001(2) and 1. 759695(2) angstroms, respectively. <br /><br /> Gaseous BeH², MgH², ZnH² and HgH² molecules were discovered and unambiguously identified by their high-resolution infrared emission spectra. The &nu;₃ antisymmetric stretching fundamental band and several hot bands in the &nu;₃ region were rotationally analyzed, and spectroscopic constants were obtained for almost all naturally-occurring isotopologues. The rotational constants of the 000 ground states were used to determine the <em>r</em>₀ internuclear distances. For BeH₂, ZnH₂, ZnD₂, HgH₂ and HgD₂ molecules, the rotational constants of the 000, 100, 01¹0 and 001 levels were used to determine the equilibrium rotational constants (<em>B</em>_e) and the associated equilibrium internuclear distances <em>r</em>_e. The <em>r</em>_e distances of ZnH₂ and ZnD₂ differed by about 0. 01%, and those of HgH₂ and HgD₂ differed by about 0. 005%. These discrepancies were larger than the statistical uncertainties by one order of magnitude, and were attributed to the breakdown of the Born-Oppenheimer approximation.

Several hydrides of Group 2 and 12 elements were generated in the gas phase using an emission source that combines an electrical discharge with a high temperature furnace, and their high-resolution infrared emission spectra were recorded with a Fourier transform spectrometer. Two classes of molecules were studied: <em>a)</em> diatomic metal hydrides BeH, MgH, CaH, SrH, ZnH and CdH; <em>b)</em> linear triatomic metal hydrides BeH₂, MgH₂, ZnH₂ and HgH₂. <br /><br /> Infrared emission spectra of BeH, MgH, CaH, SrH, ZnH and CdH free radicals contained several vibration-rotation bands in their ²SIGMA⁺ ground electronic state. The new data were combined with all the previous ground state data from diode laser infrared spectra and pure rotation spectra available in the literature. Spectroscopic constants, i. e. , vibrational band origins, rotational, centrifugal distortion, and spin-rotation interaction constants, were determined for each observed vibrational level by least-squares fitting of all the data. In addition, the data from all isotopologues were fitted simultaneously using the empirical Dunham-type energy level expression for ²SIGMA⁺ states, and correction parameters due to the breakdown of the Born-Oppenheimer approximation were determined. The equilibrium internuclear distances (<em>r</em>_e) of ⁹BeH, ²⁴MgH, ⁴⁰CaH, ⁸⁸SrH, ⁶⁴ZnH and ¹¹⁴CdH were determined to be 1. 342424(2), 1. 729721(1), 2. 002360(1), 2. 146057(1), 1. 593478(2) and 1. 760098(3) angstroms, respectively, and the corresponding <em>r</em>^e distances for ⁹BeD, ²⁴MgD, ⁴⁰CaD, ⁸⁸SrD, ⁶⁴ZnD and ¹¹⁴CdD are 1. 341731(2), 1. 729157(1), 2. 001462(1), 2. 145073(1), 1. 593001(2) and 1. 759695(2) angstroms, respectively. <br /><br /> Gaseous BeH², MgH², ZnH² and HgH² molecules were discovered and unambiguously identified by their high-resolution infrared emission spectra. The &nu;₃ antisymmetric stretching fundamental band and several hot bands in the &nu;₃ region were rotationally analyzed, and spectroscopic constants were obtained for almost all naturally-occurring isotopologues. The rotational constants of the 000 ground states were used to determine the <em>r</em>₀ internuclear distances. For BeH₂, ZnH₂, ZnD₂, HgH₂ and HgD₂ molecules, the rotational constants of the 000, 100, 01¹0 and 001 levels were used to determine the equilibrium rotational constants (<em>B</em>_e) and the associated equilibrium internuclear distances <em>r</em>_e. The <em>r</em>_e distances of ZnH₂ and ZnD₂ differed by about 0. 01%, and those of HgH₂ and HgD₂ differed by about 0. 005%. These discrepancies were larger than the statistical uncertainties by one order of magnitude, and were attributed to the breakdown of the Born-Oppenheimer approximation.

This work presents a summary of experimental data and theoretical models that characterize the temperature-dependent behavior of key carrier-transport parameters in silicon down to cryogenic temperatures. In extreme environment applications such as space-based electronics, accurate models of carrier recombination, carrier mobility, and incomplete ionization of dopants form a necessary foundation for the development of reliable high-performance devices and circuits. Not only do these models have a wide impact on the simulated DC and AC performance of devices, but they also play a critical role in predicting the behavior of important phenomena such as single event upset in digital logic circuits. With this motivation, an overview is given of SRH recombination theory, addressing in particular the dependence of recombination lifetime on temperature and injection level. Carrier lifetime measurement methods are reviewed, and experiments to study carrier lifetimes in the substrate of a commercial SiGe BiCMOS process are presented. The experimental data is analyzed and leveraged in order to develop calibrated TCAD-relevant models. Similarly, an overview of low-temperature resistivity in silicon is presented. Modeling of resistivity over temperature is discussed, addressing the prevailing theoretical models for both carrier mobility and incomplete ionization of dopants. Experimental measurements of the temperature dependence of resistivity in both p-type and n-type silicon are presented, and calibrated TCAD-relevant models for carrier mobility and incomplete ionization are developed. Finally, the ability to integrate these calibrated models within commercial TCAD software is demonstrated. In addition, applications for these accurate temperature-dependent models are discussed, and future directions are outlined for research into cryogenic modeling of fundamental physical parameters.

p. 1 - 127 / Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-01-31T18:40:09Z No. of bitstreams: 1 444.pdf: 4212397 bytes, checksum: 6a50dcb119faa11bc449dea3cee42adb (MD5) / Approved for entry into archive by Fatima Cleômenis Botelho Maria (botelho@ufba.br) on 2013-02-04T14:31:25Z (GMT) No. of bitstreams: 1 444.pdf: 4212397 bytes, checksum: 6a50dcb119faa11bc449dea3cee42adb (MD5) / Made available in DSpace on 2013-02-04T14:31:25Z (GMT). No. of bitstreams: 1 444.pdf: 4212397 bytes, checksum: 6a50dcb119faa11bc449dea3cee42adb (MD5) Previous issue date: 2007 / Quais os modelos de comunicação que necessitamos em nossas atividades sócio-ambientais? Como tratar a questão da comunicação social, no âmbito de uma organização pública, no contexto político baiano? A presente dissertação, desenvolvida no Mestrado Profissional de Administração da Universidade Federal da Bahia, intitulada Comunicação Social como instrumento para a gestão dos Recursos Hídricos: uma análise da experiência de uma organização pública – o caso SRH-Bahia enfoca a as práticas de comunicação na Superintendência de Recursos Hídricos da Bahia (SRH-Ba). O trabalho buscou provocar o diálogo entre a realidade da SRH-Ba e a teoria relacionada ao campo do meio ambiente, da Comunicação Social, da informação e da participação social. Após a construção, houve a “desconstrução” da noção de que a teoria fosse capaz de dar luz segura a um futuro incerto. O que se descortinou foi uma realidade nua e dura de um modelo tradicional de gestão, que corre para se contemporaneizar, pautando-se no planejamento do balanced score card e na participação social num contexto democrático. Trata-se de uma busca frenética pela compreensão e implantação do que se entenda por sustentabilidade e meio ambiente, recursos hídricos e participação social procurando assim coabitar entre as diversas áreas interdisciplinares necessárias para essa gestão: técnica, cognitiva, econômica, social e política. / Salvador

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This diploma thesis deals with the possibilities of using the left inundation area of Svitava river for purposes of transformation of the 100-years flood wave in Svitava. The area of interest is located on the territory of the Holásky and Chrlice city districts. SMS software with a hydraulic two-dimensional simulation model SRH was used to simulate the flow in the current state and variant solutions of the proposed state. Based on the results of the flow in the current state, two variant solutions of the proposed state were designed and simulated. The result of this work is the quantification of the change in the transformation capabilities of the area of interest in both proposed variants and followed by a recommendation.

The turbine inlet guide vanes of a gas-turbine are subjected to extreme hot gas temperatures which increases the risk of mechanical failure and overall reduces the component lifespan. Hence, it is of great interest for gas-turbine manufacturers to establish methods for accurately estimating the temperature distribution along the vane surface. Due to the three-dimensional nature of turbine flow, it is of interest to establish Computational Fluid Dynamics (CFD) methodology which capture these three-dimensional effects. This thesis is one in a collection of theses conducted at Siemens Energy AB on the subject. Previous studies have investigated and validated the implementation of RANS simulations on non-cooled turbine vanes and endwalls. In this study, the focus is on studying a film cooled vane and establishing one RANS as well as one hybrid modelling strategy for heat transfer coefficient (HTC) predictions. The HTC prediction capabilities are compared and validated against experimental data presented in the doctoral thesis by Fabrizio Fontaneto on the LS94 vane at Von Karman Institute. The chosen RANS modelling method was the Shear Stress Transport (SST) k-ω turbulence model, with γ-Reθ transition modelling, based on the findings by Enico (2021) and Daugulis (2022). The model proved capable in estimating the HTC well on mainly the suction side of the vane. The pressure side HTC was largely under-predicted, a common issue with the SST model also seen in the previous theses as well as the hybrid simulations. The strength of the SST k-ω turbulence model, with γ-Reθ transition modelling, is in accurately capturing the HTC magnitude, most likely due to the well-predicted turbulence intensity decay at the inlet. However, it largely under-predicts the HTC along the suction side film-coolant layer, implying that it may be over-estimating the film-cooling capabilities. The hybrid model chosen was the Scale Resolving Hybrid (SRH) model, with underlying RANS SST k-ω. Compared to RANS, hybrid results were under-estimated, seemingly offset from the experimental data by a constant 200 units along the entire vane midspan. This is likely due to the inaccurate turbulence intensity presented in the SRH simulations, which decays quickly along the inlet compared to RANS and experimental data. Yet still, the hybrid model showed potential in capturing certain results not seen with RANS, such as the secondary flow effects by the vane endwalls, as well as arguably capturing the general HTC trend at midspan seen in the experimental data. Additionally, the section of severely under-predicted HTC by the suction side film-coolant seen with RANS is not present in the hybrid results. Although the hybrid model has proven promising in many aspects, in its current state it is not a viable method for HTC predictions due to its general under-prediction of HTC. Largely, the authors suspect this is due to the undesirably coarse mesh around the cooling holes, which leads to RANS computation in regions where SRH is desired. Thus, improvements would need to be made to the model, where, for example, implementing a zonal hybrid RANS-LES model would be an option. Considering the hybrid model in its current state, RANS is the preferred method, especially when considering the greater computational cost and the labor associated with hybrid simulations which were experienced during this study. In conclusion, it is evident that the correct capture of inlet turbulence intensity decay as well as suitable mesh refinement by the cooling holes are crucial for obtaining the correct magnitudes of HTC, and thus, the capture of it should be of utmost priority in future work within the field.

There is concern about the indoor environment in aircraft but few stud-ies exist on self-rated health (SRH) and respiratory symptoms among pilots. Occupational and non-occupational risk factors for SRH, respira-tory symptoms and other symptoms among commercial pilots were investigated in this thesis. One cohort study and one prevalence study were performed among pilots in one Scandinavian airline company. Fungal DNA, furry pet allergens and volatile organic compounds of microbial origin (MVOC) were measured on board. Cat (fel d1), dog (Can f1) and horse (Ecu cx) allergens were found in all dust samples and allergen levels were 27-75 times higher in aircraft with textile seats as compared to leather surfaces. The sum of MVOCs in the cabin air was 3.7 times higher than in homes in Uppsala and 2-methyl-1-butanol and 3-methyl-1-butanol concentrations were 15-17 times higher. Asper-gillus/Penicillium DNA and Aspergillus versicolor DNA were more common in aircraft with textile seats. One fifth reported SRH as poor or fair, 62% had fatigue, 46% overweight/obesity and 71% insomnia. Poor or fair SRH was associated with overweight/obesity, lack of exercise, insomnia, low sense of coherence (SOC) and high work demand. Re-covery from work was worse among those with insomnia and low social support at work. Fatigue was more common among young or female pilots and related to insomnia and high work demand. Pilots flying MD80 or Saab 2000 aircraft had less fatigue. Pilots exposed to environmental tobacco (ETS) on board had more eye symptoms and fatigue which were reduced after the ban of smoking (in 1997). Pilots with increased work demand developed more rhinitis, dermal symptoms and fartigue and those with decreased work control developed more eye symptoms. The incidence of doctors’ diagnosed asthma and atopy were 2.4 and 16.6 per 1000 person years, respectively. Pilots changing type of flight got more airway infections. Those reporting decreased work control had a higher incidence of atopy. Risk factors in the home environment included ETS, dampness or mould, window pane condensation in winter and living in houses built after 1975. In conclusion, SRH and respiratory health among pilots are associated with specific occupational and non-occupational risk factors.