Labeling of malt beverages is impacted by multiple entities, both regulatory and industry. The entity with the most overt impact is the Alcohol and Tobacco Tax and Trade Bureau (TTB), which defines and regulates the following items: 1) required label components for beverages that meet the TTB’s institutional definition of “malt beverage”, and 2) the formula approval process for malt beverages required to undergo the pre-Certificate of Labeling Approval (COLA) evaluation. In order for producers of malt beverages to sell their products in interstate commerce, they must first satisfactorily complete the Certificate of Labeling Approval (COLA) process. For products that are created using “nontraditional” processes or ingredients, producers must also complete a formula submission prior to completing the COLA process. The substantial growth of the craft brewing industry has resulted in a corresponding increase in the submission volume of COLAs and formula approvals. The increased workload of TTB officials responsible for processing approvals, coupled with intense industry focus on innovation, has resulted in a complicated interchange between industry and government. Using three studies, this research evaluates the craft brewer experience with the TTB’s COLA and formula approval processes.The first study was a qualitative research study conducted to explore craft brewers’ perceptions of regulations related to the COLA and formula approval processes. Using convenience sampling, 13 interviews were conducted with craft brewers from August 2018 to December 2018. All interviews were conducted using a semi-structured interview guide and analyzed using a thematic approach. The findings indicate that formula and labeling approval presents unique challenges to craft brewers. Participants associated with small and large craft breweries identified opportunities for improved communication between the craft brewing industry and the TTB. The data collected also indicate that that there exist opportunities to improve existing resources for brewers as they pertain to labeling and formula approval.The second study evaluated the role of brewery characteristics in brewer preparation of COLA and formula submissions. Using survey data, the relationship between brewery characteristics and regulatory submission outcomes was evaluated. The brewery characteristics of interest were number of full-time personnel, permit age, production volume, and COLA and formula submission volume. The submission outcomes evaluated were information burden, expense burden, and resubmission frequency of COLA and formula approvals. The results indicated that production volume significantly predicts one measure of information burden (regulatory navigation) related to COLA preparation: the data suggests that as production volume increases, information burden decreases. In addition, submission volume of formulas was significantly related to one measure of information burden (regulatory navigation), with decreased information burden occurring alongside increased submission volume. Expense burden and resubmission frequency were not significantly predicted using any of the studied brewery characteristics.The third study examined the role of resource utilization in regulatory submission outcomes (expense burden, information burden, resubmission frequency). Using survey data, the relationship between the volume and type(s) of resources used during submission preparation and submission outcomes was evaluated. The resources of interest were: the TTB website, the Brewers Association website, advice from a fellow brewer, advice from a coworker or boss, correspondence with TTB officials, and (in formula submissions) the TTB Exemption List (Attachment 1 of TTB Ruling 2015-1) .The results indicate that advice from a boss or coworker reduced expense burden of COLA submissions, while advice from a fellow brewer was associated with decreased expense burden of formula submissions. In addition, advice from a fellow brewer, correspondence with TTB officials, and use of the Brewers Association website were all associated with decreased information burden of COLA submissions. Information burden associated with formula submissions was significantly predicted using advice from a fellow brewer and advice from a boss and/or coworker. Resubmission frequency of formula submissions was significantly predicted using correspondence TTB officials.

Transition metal fluorides represent an important family of complex solids displaying a variety of different properties and interesting phenomena. Despite their remarkable behaviour, these classes of materials have not received much attention and the rationalization of their behaviour is still lacking a systematic approach. This thesis aims to contribute to the field by examining previously unknown or understudied complex fluorides. The compounds were selected for their intriguing physical properties that range from superconductivity to multiferroism. The discovery of superconductivity in the iron pnictides sparked new interest in materials with layered ZrCuSiAs-type structure. Herein the properties of one of these systems, namely SrFeAsF, will be discussed. We have found that it behaves as a poor metal and undergoes a tetragonal (P4/nmm) to orthorhombic (Cmma) structural transition at T = 180 K, accompanied by a spin density wave in magnetic susceptibility and electrical resistivity. Below T < 150 K, the Fe moments order in antiferromagnetic spin-stripes. Electron doping with La3+ is a successful route to obtain superconducting phases, with maximum Tc = 27 K (x = 0.2). The isostructural AeMnPnF series (Ae = Sr, Ba; Pn = P, As, Sb) was also investigated to elucidate the influence of transition metal d-electrons and size effects of Ae and Pn on the physical properties. The isoelectronic replacement of Ae and Pn leads to a significant distortion in the tetragonal building blocks. All d5 Mn fluorides investigated here are insulating antiferromagnets with TN ~ 350 K. Due to the coexistence of electronic and magnetic ordering, the tetragonal tungsten bronze (TTB) materials KxM2+ xM3+ 1-xF3 (x = 0.4 – 0.6; M = transition metal) are potential multiferroics. The type of structural distortion adopted by these systems is strongly dependant on the M2+/M3+ ratio. For instance, our high-resolution diffraction study on K0.5Mn0.5Cr0.5F3 has revealed a small orthorhombic distortion, which indicates full chemical order of Mn2+ and Cr3+ on all crystallographic sites. K0.5Mn0.5Cr0.5F3 remains orthorhombic Ccc2 on cooling through the ferromagnetic transition at TN = 23 K. On heating, the structure is acentric up to T = 373 K, where a change to tetragonal P42/mbc symmetry marks the transition from ferroelectric (polar) to paraelectric (apolar) states. High-pressure diffraction experiments have shown that the Ccc2 structure is robust upon pressurization with anisotropic axial compressibility up to the maximum pressure applied p = 18 GPa. The crystal structure of related mixed-valence TTB fluoride K0.6Cr2+ 0.6Cr3+ 0.4F3 is influenced by the presence of Jahn-Teller active Cr2+. The structural analysis described here revealed the presence of a small polar monoclinic distortion (P112) providing a clear signature of full charge order (CO). On heating, the gradual loss of CO leads to two consecutive structural phase transitions to orthorhombic (Pba2, T = 423 K) and then tetragonal (P42/mbc, T = 823 K) lattices, the latter is the signature of the ferro- to paraelectric transition. Below T = 150 K, increased X-ray exposure time leads to CO-melting and the stabilization of a new, charge-disordered orthorhombic phase (Cmm2), with a phenomenology similar to the CO manganites. In highpressure diffraction experiments, a further transition to tetragonal P4bm symmetry is found at p = 6 GPa. The magnetic susceptibility points towards a complex spin arrangement, with two transitions at TN = 33 K and 6 K. The results presented herein show the richness of the structural, electronic and magnetic phase diagrams of transition metal fluorides and clearly demonstrate that systematic studies on these systems will greatly enhance our current understanding of the underlying mechanisms of important phenomena such as superconductivity and ferroelectricity.

Des recherches très importantes ont été dédiées à l'étude des composés ferroélectriques de type bronze de tungstène quadratique (TTB). Cette thèse concerne la synthèse et la caractérisation de 7 matériaux TTB de formule générale A6M2M'8O30 (A = Sr2+, Ba2+ ou Pb2+, M = Ti4+, Zr4+ ou HF4+; M' = Nb5+ ou Ta5+). Ces composés cristallins de grande taille ∼100 nm ont été synthétisés sous forme de poudre. Les moyennes expérimentales : diffractions des rayons X, spectroscopie Raman, la microscopie électronique MEB et MET, l'optique non linéaire ONL, ont permis d'établir des relations étroites entre structure et propriétés physiques. Les susceptibilités optiques non linéaires de 2eme et 3eme ordres, χ(2), χ(3) de chaque composés ont été déterminées et les valeurs résultantes du χ(3) ne montrent pas les mêmes caractéristiques que χ(2), car le signal de THG est moins dépendant de structure que SHG qui requiert un milieu non-centrosymétrique. Le décalage fréquentiel (Δσ) des modes de vibrations entre les structures à base de strontium(Sr) et celles à base de Barium(Ba) a été constaté afin d'identifier les signatures propres de ces composés. L'interprétation de ces poudres n'était pas facile car les pics sont très délicats. Nos mesures expérimentales montrent clairement que les positions des pics peuvent être modifiées par le changement cationique au sein des matériaux, plus la maille cristalline est rigide, plus on a des pics plus discernables. La différence est nettement visible là ou l'émission est autour de 808 cm-1 pour la structure (Sr), alors que pour le (Br) elle est autour de 780cm-1. Nous attribuons ce Δσ (28cm-1) à la transition de groupe de symétrie spatiale de Pba2 vers P4bm. L'ensemble des résultats décrits dans ce travail ont montrés la grande variété des paramètres sur lesquels il est possible d'agir afin d'optimiser les compositions en vue d'une application spécifique. / Recently, very significant research has been devoted to the study of ferroelectric compounds of tetragonal tungsten bronze (TTB). This thesis deals with the synthesis and characterization of 7 TTB's material with general formula A6M2M'8O30 (A = Sr2+, Ba2+ or Pb2+, M = Ti4+, Zr4+ or HF4+, M '= Nb5+ or Ta5+). These crystalline compounds of large size ~ 100 nm were synthesized in powder form. The experimental Technics: X-ray diffraction, Raman spectroscopy, scanning electron microscopy SEM and TEM and nonlinear optics NLO, allowed us to establish close relationships between structure and physical properties. The nonlinear 2nd and 3rd order optical susceptibility χ(2), χ(3) of all compounds were determined and the resulting values of χ(3) did not show the same characteristics as measures of χ(2) because the THG signal is less dependent on the structure where SHG signal requires a non-centro-symmetric medium. The frequency shift between the vibration modes of structures containing strontium (Sr) and those based on Barium (Ba) has been detailed to identify signatures of these specific compounds. The interpretation of these powders wasn't that easy as these peaks are very delicate but our experimental results clearly show that the positions of the peaks can be modified by the change in cation materials, as long as the crystal lattice is more rigid, more we get discernible Raman modes. This difference is clearly visible where the emission is around 808 cm-1 for the structure Sr, whereas the Br it is centered around 780cm-1. We attribute these Δσ (28cm-1) to the transition of spatial symmetry group from Pba2 to P4bm. Results showed the wide variety of settings in which it is possible to act in order to optimize the compositions for a specific application.

A research report submitted to the Wits School of Education, Faculty of Humanities, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Education by combination of coursework and research. Johannesburg 2013 / This study investigates and addresses the issue of bullying of teachers by learners, which is also referred to as teacher-targeted bullying (TTB). The purpose of this study is to obtain data relating to the nature and extent of teacher-targeted bullying in a High School in Gauteng West. The setting is a former Model C, co-educational school, consisting of 1 354 learners (Grade 8 to Grade 12). The ethnicity of the School is predominantly Black, with 60% Black learners to 40% Caucasian, and the gender ratio of learners in the school is 706 girls to 648 boys. The current teacher population consists of a staff quotient of seventy-five teachers (75), twenty (20) male and fifty-five (55) female teachers, who are employed at the school, which will also be known as “the workplace” for the purposes of this research. The procedure for this research entailed using a teacher group of seventy (70) teachers, of whom fifty four (54) volunteered to complete the questionnaire, allowing an in-depth response by establishing factors contributing to the difficulties of learner bullying experienced by teachers; the effect on teacher performance, morale and student learning; and the support needed from education management for teachers experiencing bullying by their learners. From these questionnaires, the process was extended to a semi-structured interview, in order to follow up on the questionnaire. This allowed an understanding of the teacher’s life experiences or situations as experienced in their own words, for the twelve (12) volunteer teachers who had experienced bullying by learners. In this mixed method design, quantitative results enhanced generalizability, and qualitative results helped to explain how teachers experienced teacher-targeted bullying by learners in this Gauteng West High School. The research findings indicated that, prominent in this study, is the stress reported by teachers relating to the disciplining of learners. The level of reported learner-on-teacher-bullying was more evident in the classroom. It was also reported that all Grades were problematic for teachers, but the level of reported stress was more evident with Grade 9 male learners in same-gender classes. Furthermore, difficulties within this school environment, as well as the effect on teachers’ performance, morale and support from school management were established. In an effort to respond to the epidemic of learners who target and bully teachers, a reconceptualisation of the learner-on-teacher-bullying construct in the School under review, as well as other schools in South Africa, is needed. Thus bullying of teachers by learners must be tackled as a whole-school issue, with the focus on positive learner behaviour, good support structures, and active leadership, ensuring that staff are not only supported, but are also seen to be supported, by the various role players.

Transparent glasses embedded with TTB structured ferroelectric nano/micro crystals (K3Li2Nb5O15, Ba5Li2Ti2Nb8O30) were fabricated in various tellurite and borate based glass matrices and characterized for their physical properties. Nanocrystals of K3Li2Nb5O15 were successfully grown inside tellurite glass matrix via conventional heat-treatment route. Eventhough, tellurite glasses preferentially crystallize only on the surface, bulk uniform crystallization was achieved in the (100-x) TeO2 - x(1.5K2O-Li2O-2.5Nb2O5) system. Heat capacity studies revealed them to be thermodynamically less fragile than any other tellurite glasses ever reported in the literature. Pyroelectric and ferroelectric effects as well as second harmonic generation were demonstrated for the heat treated (glass nanocrystal composites) samples in this system. The conventional method of melt-quenching of constituent oxides could not yield Ba5Li2Ti2Nb8O30 crystallites. So, Ba5Li2Ti2Nb8O30 microcrystals were successfully formed in tellurite glass matrix by mixing pre-reacted Ba5Li2Ti2Nb8O30 ceramic powders with TeO2. The glass transition temperature was found to be the highest ever reported and this system was kinetically strong based on the fragility parameter. Dielectric studies revealed a frequency and temperature independent nature of the dielectric constant and very low dielectric loss. The SHG measurement which was carried out as a function of temperature demonstrated the incidence of blue second harmonic generation in the microcrystals present in the glass matrix. Ba5Li2Ti2Nb8O30 nanocrystals were successfully crystallized in the transparent glass system (100-x)Li2B4O7 – x(Ba5Li2Ti2Nb8O30). Dielectric constant increased while the dielectric loss decreased with the increase in Ba5Li2Ti2Nb8O30 content. Nuclear magnetic resonance spectroscopic studies were carried out to have an insight into the structure of this system. Transmission studies and refractive index measurements were performed and various optical parameters were calculated. Dielectric and transport properties were studied for the glasses and glass nano/microcrystal composites of all the systems reported in this thesis. Li+ ion was found to be responsible for conduction in all these systems. Evolution of self-organized nanopatterns of K3Li2Nb5O15 crystals has been demonstrated in the glass system (100-x) TeO2 - x(1.5K2O-Li2O-2.5Nb2O5) by excimer laser irradiation. The second harmonic signal observed by the Maker fringe technique has been attributed to the presence of well-aligned nano-sized grating structures in the glass system. Glasses belonging to the systems TeO2-K3Li2Nb5O15, TeO2-Ba5Li2Ti2Nb8O30 and V2Te2O9 undergo spinodal decomposition on exposing to KrF pulsed excimer laser. The spinodally phase separated structures were observed on all the surfaces of the samples. Ring shaped patterns were observed on several locations of the samples at higher frequency of laser pulses probably owing to the shock waves produced by the high intense laser beam. Line shaped patterns were found to originate on the sample surfaces when irradiated for longer periods.