The problem addressed by this study was to determine whether differences existed between principals and teachers, principals and students, and teachers and students in terms of their perceptions of the behavior of principals in selected junior high schools in Chattanooga, Tennessee. Comparisons were based on teachers', students', and principals' responses on the Likert Profile of a School Questionnaire. The responses were analyzed based on measured characteristics of schools, i.e., large schools versus small schools, suburban schools versus inner-city schools, predominantly Black schools versus predominantly white schools, and schools with substantial increases in enrollment versus schools with substantial decreases in enrollment. The subjects in this study were 86 percent of the principals (N = 18), 84 percent of the teachers (N = 244), and 76 percent of the student (N = 4,482) populations of the junior high schools in the school system. Glass and Stanley's (1970) model for the two-factor non-orthogonal analysis of variance was employed to determine differences at the .05 level. The following conclusions were formulated based upon critical analysis of the data: 1. The appraisals of principals' behavior as rated by teachers were consistently lower than principals' self-appraisals on each organizational variable considered. The appraisals of principals' behavior as rated by students were uniformly lower than that of principals and teachers. 2. Principals' ratings of their own behavior concerning teachers were consistently higher than their ratings concerning students on each variable considered. 3. The divergence in the perceptions of teachers versus students on principal support is related to the racial composition and location of schools. 4. The divergence in the perceptions of students versus teachers on principals' receptivity to subordinates' ideas is related to the racial composition of schools. 5. The divergence in the perceptions of principals versus teachers and principals versus students on principals' receptivity to subordinates' ideas are related to the size of schools. 6. A greater divergence exist in the perceptions of principals versus teachers and principals versus students on the amount of influence subordinates have in large schools when contrasted with the same reference groups in small schools. 7. The divergence in the perceptions of teachers versus students on the amount of influence subordinates have is related to the racial composition of schools. 8. A divergence in the perceptions of principals versus teachers and principals versus students existed in all schools investigated / Ed. D.

The problem of an interacting electron gas in a static lattice (an inhomogeneous electron gas) at zero temperature is treated by use of field theoretic perturbation theory. The unperturbed system is taken to be a non-interacting electron gas in a static lattice. The electron-electron interactions are then treated as a perturbation or;. this system. One-particle basis functions, Bloch functions, are introduced explicitly into the perturbation series for the Green functions, and diagrams associated with the various terms are defined. Certain formal results in integral equation form are noted. Using the method of DuBois, the plasmon excited state is studied. In particular, plasmon energies and lifetimes are calculated in the pair approximation for several insulators. / Ph. D.

Described in this report is stimulated echo pulsed field gradient (STE-PFG) 1H nuclear magnetic resonance (NMR) diffusion on neutral and negatively charged magnetically aligned bicelles incorporating the Pluronic tri-block copolymer F68. Bicelles are model lipid membrane systems composed of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC). Pluronic F68 incorporated into neutral bicellar mixtures (q= [DMPC]/[DHPC]= 4.5) exhibited resonance intensity decays that are non-exponential and diffusion-time dependent., i.e. non-Gaussian diffusion. In contrast, Pluronic F68 incorporated in negatively charged bicellar mixtures, containing 1 mol% 1,2-dimyristoyl-sn-glycero-3-phosphoglycerol (DMPG), showed the F68 intensity decays that are exponential and diffusion-time independent, viz., Gaussian diffusion. The implication may be that neutral bicellar mixtures incorporating Pluronic F68 consist of extended lamellae composed of meshed ribbon structures, while negatively charged bicellar mixtures incorporating Pluronic F68 consist of perforated lamellae. Pluronic F68 incorporated into the bicelles reports these morphological differences through its diffusion.

Described in this report is stimulated echo pulsed field gradient (STE-PFG) 1H nuclear magnetic resonance (NMR) diffusion on neutral and negatively charged magnetically aligned bicelles incorporating the Pluronic tri-block copolymer F68. Bicelles are model lipid membrane systems composed of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC). Pluronic F68 incorporated into neutral bicellar mixtures (q= [DMPC]/[DHPC]= 4.5) exhibited resonance intensity decays that are non-exponential and diffusion-time dependent., i.e. non-Gaussian diffusion. In contrast, Pluronic F68 incorporated in negatively charged bicellar mixtures, containing 1 mol% 1,2-dimyristoyl-sn-glycero-3-phosphoglycerol (DMPG), showed the F68 intensity decays that are exponential and diffusion-time independent, viz., Gaussian diffusion. The implication may be that neutral bicellar mixtures incorporating Pluronic F68 consist of extended lamellae composed of meshed ribbon structures, while negatively charged bicellar mixtures incorporating Pluronic F68 consist of perforated lamellae. Pluronic F68 incorporated into the bicelles reports these morphological differences through its diffusion.

[by] I. Grattan-Guinness, in collaboration with J. R. Ravetz. / Includes Fourier's original unpublished text of 1807 with title: Th鯲ie de la propagation de la chaleur dans les solides. The first separately published version appeared in 1822 under title: Th鯲ie analytique de la chaleur. / Bibliography: p. [491]-502.

The central purpose of this study was to determine if affective work-related skills expected of workers by their employers could be identified using the critical incident technique. Additionally~ this study sought to determine if there were affective skills common among several selected occupational areas. The following research questions gave direction to this study: 1. Can the Critical Incident Technique be used to identify work related affective skills needed by persons employed in the television service and repair, electronic assembler (manufacturing), and television sales (retail) occupational areas? 2. Can these skills be grouped into meaningful clusters? 3. Are different affective skills required by persons in each of the three occupational areas? The research procedure used in this study was the Critical Incident Technique developed by John Flanagan. Five steps are included: (1) determination of the general aim of the activity, (2) developing plans and specifications for collecting factual incidents, (3) collecting data, (4) analyzing the data, and (5) interpreting and reporting the data. The instrument used to collect critical incidents was adapted from the form developed by W. K. Kirchner and M. D. Dunnette. It was composed of two major sections: (1) the Effective Critical Incident Form and (2) the Ineffective Critical Incident Form. Respondents in this study were divided into three strata according to occupational areas: television retail sales supervisor, television service and repair supervisor, and electronic assembler supervisor. Thirty names of line management personnel were randomly selected from each strata for individual interviews. Critical incident interview reports were reviewed and work-related affective behavioral statements were abstracted from each incident. A panel of experts was used to review the list of behavior statements. The final instrument included 63 behavior statements. A random sample of line management personnel (394) were potential respondents in this study. Each participant provided biographical data and indicated degree of agreement (Very Unimportant to Very Important) with 63 work-related affective behavior statements. The analysis of data consisted of computing means for each of the behavior statements and comparing them to an established criterion (mean score greater than 2.50). Factor analysis was used to reduce the data and to group the behavior statements into meaningful clusters (factors). One way analysis of variance was used to determine whether there were significant differences between the factors and the occupational areas used in this study. / Ed. D.

<p>This thesis studies the development and implementation of a material requirements planning system designed to satisfy the production and inventory needs of a particular plant. It traces the development of the various management techniques from the intuitive ordering of parts, through the various stock replenishment systems, to the design of an MRP system. Special emphasis is placed on the review of forecasting, safety stock, and ordering policies because these techniques will be included in, or used in association with, the MRP system.</p> / Master of Science

The objectives of this study were to characterize the effects of the space environment on the compressive behavior of T300/934 graphite/epoxy composite material and on the tensile properties of the neat (unfilled) epoxy matrix material. Both materials were tested in the baseline state and after exposure to electron radiation (total dose of 10,000 Mrads of 1 MeVelectrons at a dose rate of 50 Mrads/hr). Irradiation was conducted under vacuum and simulates 30 year, "worst case", exposure in geosynchronous earth orbit. A compressive test method was developed to characterize thin (8-ply) unidirectional coupons. Compression tests were conducted at cryogenic (-250°F; -157°C), room, and elevated (250°F; 121°C) temperatures. Elastic and strength properties were obtained in the principal material directions (E₁, E₂, v₁₂, v₂₁, X_c, Y_c). Tensile specimens of the neat Fiberite 934 epoxy resin were fabricated and tests were conducted at room and elevated (250°F; 121°C) temperatures. Elastic and strength properties (E, ν, δ_ult) were obtained. Irradiation and temperature were found to have a significant effect on composite and neat resin properties. Properties tended to improve at cryogenic temperature and degrade at elevated temperature. Irradiation degraded properties at all temperatures, with the degradation being most severe at elevated temperature. / M.S.

Diante da extensa utilização de fármacos associados às soluções parenterais de grande volume (SPGV) e muitas vezes da impossibilidade da administração dos mesmos em diferentes veículos de infusão, sejam pela perda da estabilidade ou por insolubilidade destes, a utilização de copolímeros como carreadores de fármacos vêm a favorecer a associação destes às SPGV. Este trabalho visa avaliar a estabilidade dos fármacos ceftazidima e aminofilina nas SPGV carreados pelo copolímero Pluronic® F68 e o estudo da GFP como potencial biossensor da estabilidade de fármacos nas SPGV. A estabilidade dos fármacos ceftazidima (320ug/mL) e aminofilina (160ug/mL) em SPGV foi avaliada, na presença e na ausência de Pluronic® F68, através da utilização de HPLC logo após preparo e após período de 24hs, usando sistema Schimadzu LC10, LC-solution software, Schimadzu C18, fluxo 0,5mL/min, detecção em &#955;=255nm (ceftazidima) e &#955;=275nm (aminofilina), volume de injeção 20uL, 25ºC. A determinação da concentração mínima inibitória (CMI) foi realizada em amostras de ceftazidima (240ug/mL) na presença e na ausência de Pluronic® em SPGV de 5% glicose usando E. coli ATCC 25922 e P.eruginosa ATCC 9721 na concentração de 106UFC/mL . Pluronic® F68 foi utilizado nas amostras para avaliação da estabilidade dos fármacos ceftazidima e aminofilina na concentração 10% m/m. Resultados mostraram uma incompatibilidade entre a associação dos fármacos em SPGV de 5% glicose, com perda de concentração de 25% do fármaco ceftazidima na ausência de Pluronic®. Nos ensaios de CMI realizados com fármaco ceftazidima em SPGV de 5% glicose observou-se uma melhora dos valores de CMI quando o fármaco foi associado ao copolímero Pluronic® para ambos os microrganismos estudados. O estudo da GFP mostrou que fatores como (i) as propriedades físico-químicas dos fármacos, (ii) valores de pH das soluções e (iii) interações entre a proteína e as SPGV, podem favorecer mudanças de intensidade de fluorescência da GFP (determinada em espectrofluorímetro &#955;ex=394nm, &#955;em=509nm), favorecendo seu potencial emprego como biossensor da estabilidade de fármacos. / Drug association administered through parenteral solutions is a common hospital practice. Copolymers as carriers in parenteral solutions may allow originally unstable or insoluble drug combinations, or even improve their action. The aim of this work was to evaluate the stability of ceftazidime and aminophylline in parenteral solutions carried by Pluronic® F68, besides the application of the green fluorescent protein as a biossensor of drug stability. To evaluate the stability of ceftazidime (320 &#181;g/mL) and aminophylline (160 &#181;g/mL) carried by Pluronic® F68 (10%) in parenteral solutions, HPLC measurements were made immediately after the drug mixture preparation and after 24 hours, detected at &#955;=255nm (ceftazidime) and &#955;=275nm (aminophylline). In addition, minimal inhibitory concentration test (MIC) was used to determine the biological activity of ceftazidime (240 &#181;g/mL) in 5% glucose parenteral solution, with or without Pluronic® F68 (10%). The strains tested by MIC were E. coli ATCC 25922 and P.aeruginosa ATCC 9721 (106UFC/mL). The HPLC experiments showed incompatibility of ceftazidime and aminophylline associated in 5% glucose parenteral solution, with 25% loss for ceftazidime without Pluronic® F68. MIC analysis for ceftazidime, with or without aminophylline, showed that lower antibiotic concentration values were required to inhibit E. coli and P.aeruginosa growth, when the copolymer Pluronic® F68 was present in the samples. It was also showed that physical chemical drugs alterations, pH values and protein-parenteral solution interactions can change GFP fluorescence intensity (detected by espectrofluorimeter &#955;ex=394nm, &#955;em=509nm). These data endorse the potential of this protein as a biosensor of drug stability in parenteral solutions.

Diante da extensa utilização de fármacos associados às soluções parenterais de grande volume (SPGV) e muitas vezes da impossibilidade da administração dos mesmos em diferentes veículos de infusão, sejam pela perda da estabilidade ou por insolubilidade destes, a utilização de copolímeros como carreadores de fármacos vêm a favorecer a associação destes às SPGV. Este trabalho visa avaliar a estabilidade dos fármacos ceftazidima e aminofilina nas SPGV carreados pelo copolímero Pluronic® F68 e o estudo da GFP como potencial biossensor da estabilidade de fármacos nas SPGV. A estabilidade dos fármacos ceftazidima (320ug/mL) e aminofilina (160ug/mL) em SPGV foi avaliada, na presença e na ausência de Pluronic® F68, através da utilização de HPLC logo após preparo e após período de 24hs, usando sistema Schimadzu LC10, LC-solution software, Schimadzu C18, fluxo 0,5mL/min, detecção em &#955;=255nm (ceftazidima) e &#955;=275nm (aminofilina), volume de injeção 20uL, 25ºC. A determinação da concentração mínima inibitória (CMI) foi realizada em amostras de ceftazidima (240ug/mL) na presença e na ausência de Pluronic® em SPGV de 5% glicose usando E. coli ATCC 25922 e P.eruginosa ATCC 9721 na concentração de 106UFC/mL . Pluronic® F68 foi utilizado nas amostras para avaliação da estabilidade dos fármacos ceftazidima e aminofilina na concentração 10% m/m. Resultados mostraram uma incompatibilidade entre a associação dos fármacos em SPGV de 5% glicose, com perda de concentração de 25% do fármaco ceftazidima na ausência de Pluronic®. Nos ensaios de CMI realizados com fármaco ceftazidima em SPGV de 5% glicose observou-se uma melhora dos valores de CMI quando o fármaco foi associado ao copolímero Pluronic® para ambos os microrganismos estudados. O estudo da GFP mostrou que fatores como (i) as propriedades físico-químicas dos fármacos, (ii) valores de pH das soluções e (iii) interações entre a proteína e as SPGV, podem favorecer mudanças de intensidade de fluorescência da GFP (determinada em espectrofluorímetro &#955;ex=394nm, &#955;em=509nm), favorecendo seu potencial emprego como biossensor da estabilidade de fármacos. / Drug association administered through parenteral solutions is a common hospital practice. Copolymers as carriers in parenteral solutions may allow originally unstable or insoluble drug combinations, or even improve their action. The aim of this work was to evaluate the stability of ceftazidime and aminophylline in parenteral solutions carried by Pluronic® F68, besides the application of the green fluorescent protein as a biossensor of drug stability. To evaluate the stability of ceftazidime (320 &#181;g/mL) and aminophylline (160 &#181;g/mL) carried by Pluronic® F68 (10%) in parenteral solutions, HPLC measurements were made immediately after the drug mixture preparation and after 24 hours, detected at &#955;=255nm (ceftazidime) and &#955;=275nm (aminophylline). In addition, minimal inhibitory concentration test (MIC) was used to determine the biological activity of ceftazidime (240 &#181;g/mL) in 5% glucose parenteral solution, with or without Pluronic® F68 (10%). The strains tested by MIC were E. coli ATCC 25922 and P.aeruginosa ATCC 9721 (106UFC/mL). The HPLC experiments showed incompatibility of ceftazidime and aminophylline associated in 5% glucose parenteral solution, with 25% loss for ceftazidime without Pluronic® F68. MIC analysis for ceftazidime, with or without aminophylline, showed that lower antibiotic concentration values were required to inhibit E. coli and P.aeruginosa growth, when the copolymer Pluronic® F68 was present in the samples. It was also showed that physical chemical drugs alterations, pH values and protein-parenteral solution interactions can change GFP fluorescence intensity (detected by espectrofluorimeter &#955;ex=394nm, &#955;em=509nm). These data endorse the potential of this protein as a biosensor of drug stability in parenteral solutions.