We study the conformational properties of dendrimers with flexible spacers in solutions over a wide range of concentrations from dilute solutions to melts. By combining large scale computer simulations using the bond fluctuation model with scaling arguments we identify the semi-dilute regime of dendrimers which is controlled by the concentration behavior of the linear spacers. Associated with this observation we find that the decrease in the size of flexible dendrimers is accompanied by increasing interpenetration between the molecules with increasing concentration of the solution. In the melt state we show that the size of individual dendrimers follows the scaling prediction for isolated dendrimers at the θ-point rather than that of collapsed dendrimers. The pair correlation functions between the centers of dendrimers indicate that for short spacers dendrimer solutions retain the morphological characteristics of simple liquids. For long spacers the functions reveal high penetration of neighboring dendrimers in the melt state. Our studies show that flexible dendrimers in solution can be understood with arguments similar to those of linear polymers. The role of generation is to influence the particular form of the crossover-function.

<p>This thesis focuses on measurement errors that could be ascribed to the interviewers. To study interviewer variability a measurement error model is formulated which makes a clear distinction between three sources of randomness: the sample selection, interviewer assignment, and interviewing. </p><p>In the first paper the variance of the observed sample mean is derived, and it is seen how this variance depends on parameters of the measurement error model and on the number of interviewers. An estimator of the interviewer variance, which is seen to be unbiased, and a biased intra-interviewer correlation estimator are suggested. In a simulation study it is seen that the simulation variance of the interviewer variance estimator increases for both high and low interviewer assignments and seems to have a minimum somewhere in between. </p><p>The second paper presents an expression of the variance of the observed sample mean under stratified random sampling. Two possible estimators of the variance of the mean are considered, one of which has a slight positive bias, the other a negative bias, which can be large. Two different estimators of the interviewer variance are studied. Only one of them makes it possible to find a reasonable estimate of the intra-interviewer correlation. </p><p>In the third paper an expression for the variance of the interviewer variance estimator is derived. This result may prove useful in designing future studies of interviewer variance. For a large population it will be possible to use an approximate variance, irrespective of the underlying distribution of the unknown true values.</p><p>The fourth paper deals with some issues in planning and analyzing an interviewer variance study. Three problems are considered: (i) Determining the number of interviewers and the appropriate size of the interviewer assignments; (ii) Finding the probability of negative estimates of the interviewer variance; (iii) Testing for interviewer variance.</p>

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This thesis focuses on measurement errors that could be ascribed to the interviewers. To study interviewer variability a measurement error model is formulated which makes a clear distinction between three sources of randomness: the sample selection, interviewer assignment, and interviewing. In the first paper the variance of the observed sample mean is derived, and it is seen how this variance depends on parameters of the measurement error model and on the number of interviewers. An estimator of the interviewer variance, which is seen to be unbiased, and a biased intra-interviewer correlation estimator are suggested. In a simulation study it is seen that the simulation variance of the interviewer variance estimator increases for both high and low interviewer assignments and seems to have a minimum somewhere in between. The second paper presents an expression of the variance of the observed sample mean under stratified random sampling. Two possible estimators of the variance of the mean are considered, one of which has a slight positive bias, the other a negative bias, which can be large. Two different estimators of the interviewer variance are studied. Only one of them makes it possible to find a reasonable estimate of the intra-interviewer correlation. In the third paper an expression for the variance of the interviewer variance estimator is derived. This result may prove useful in designing future studies of interviewer variance. For a large population it will be possible to use an approximate variance, irrespective of the underlying distribution of the unknown true values. The fourth paper deals with some issues in planning and analyzing an interviewer variance study. Three problems are considered: (i) Determining the number of interviewers and the appropriate size of the interviewer assignments; (ii) Finding the probability of negative estimates of the interviewer variance; (iii) Testing for interviewer variance.

Publics are facing a great challenge of infections from pathogens. Polyethylene terephthalate (PET) is widely used in health-care settings. It is vital to develop effective and regenerable antimicrobial PET. In this study, effective antibacterial modification of PET was achieved by immobilizing N-halamine biocide poly (N-chloroacrylamide) (PCA) onto PET through the formation of a surface interpenetrating network. The successful and uniform immobilization was confirmed by FTIR and XPS. The immobilization is durable to a 72 hours soxhlet extraction. Surface morphology of the fabrics did not significantly change after modification with IP less than 20%. The modified fabric can bring 100% reduction of 10e6 CFU/ml of several clinical important bacteria in 15 min contact. The regenerability of N-halamine on PAM modified PET was studied by FTIR, titration and N analysis. After 30 regeneration cycles, the PAM-DVB network modified PET was still able to provide 100% reduction of HA-MRSA in 20 min contact.

Publics are facing a great challenge of infections from pathogens. Polyethylene terephthalate (PET) is widely used in health-care settings. It is vital to develop effective and regenerable antimicrobial PET. In this study, effective antibacterial modification of PET was achieved by immobilizing N-halamine biocide poly (N-chloroacrylamide) (PCA) onto PET through the formation of a surface interpenetrating network. The successful and uniform immobilization was confirmed by FTIR and XPS. The immobilization is durable to a 72 hours soxhlet extraction. Surface morphology of the fabrics did not significantly change after modification with IP less than 20%. The modified fabric can bring 100% reduction of 10e6 CFU/ml of several clinical important bacteria in 15 min contact. The regenerability of N-halamine on PAM modified PET was studied by FTIR, titration and N analysis. After 30 regeneration cycles, the PAM-DVB network modified PET was still able to provide 100% reduction of HA-MRSA in 20 min contact.

Diploma thesis is focused on influences on the creation and size of interpenetration layers during lacquering of polycarbonate mouldings. In the diploma thesis there is a complete description of the production of the external lens for the automobile headlight. The experimental part consists of five experiments. The subject of the experiment is to find the most optimal process settings or other solutions that would lead to positive results of chemical tests. During the tests the individual phases of the production process are examined. After each experiment follows execution and evaluation of chemical tests in the reliability laboratory.

Text in English / Accompanied DVD with printed record / In this dissertation, I explore music styles from Tshianzwane village in HaMakuya, in the Limpopo Province of South Africa, particularly malende, tshigombela, and children‘s songs. I consider the music styles as embedded in their extra-musical physical structure and abstractions; social rituals; frame of reference; forms of habitus; social order; cultural capital; social meanings, behaviour, power hierarchy, status, space, agency, institutions; formal-informal education and means; symbols; musical instruments; dance; religion; ancestor worship; traditional health practice; norms and values; mentorship and rites of passage. I further explore how and why music performers and other cultural patterns at Tshianzwane interpenetrate with each other and their living space through social roles; demonstration-imitation learning method; enculturation; dialectics of normative-interpretive, embodiment-hexis or cues, internalizationexternalization, surface-deep structure, conscious-unconscious level, qualitativequantitative understanding of music styles and genres and local-foreign context; means of communication; reinterpretation and redefinition of concepts. In conclusion, I consider how people and cultural patterns at Tshianzwane, through interpenetration, form progressing and changing social web; social connections; attachments; trance; state of flux in cultural patterns; synthesis of cultural patterns; embedded contexts; shared culture and resultant cultural patterns. Since cultural patterns, as a result of interpenetration, reflect each other, I point out the challenges in socio-spatial mapping of forms of habitus and cultural patterns. In my dissertation, I use John Blacking‘s work as my primary theoretical framework. Furthermore, I use Pierre Bourdieu‘s theoretical framework, and Hugh Tracey‘s and David Dargie‘s audio CDs on African tribal music to enrich my theoretical ground. I collected my field data at Tshianzwane in collaboration with Joseph Morake and Ignatia Madalane (students), Dr Susan Harrop-Allin (supervisor), Samson Netshifhefhe, Obert Ramashia, Paul Munyai and Musiwalo (informants). / M. Mus. / Art History, Visual Arts & Musicology

Accompanied DVD with printed record / In this dissertation, I explore music styles from Tshianzwane village in HaMakuya, in the Limpopo Province of South Africa, particularly malende, tshigombela, and children‘s songs. I consider the music styles as embedded in their extra-musical physical structure and abstractions; social rituals; frame of reference; forms of habitus; social order; cultural capital; social meanings, behaviour, power hierarchy, status, space, agency, institutions; formal-informal education and means; symbols; musical instruments; dance; religion; ancestor worship; traditional health practice; norms and values; mentorship and rites of passage. I further explore how and why music performers and other cultural patterns at Tshianzwane interpenetrate with each other and their living space through social roles; demonstration-imitation learning method; enculturation; dialectics of normative-interpretive, embodiment-hexis or cues, internalizationexternalization, surface-deep structure, conscious-unconscious level, qualitativequantitative understanding of music styles and genres and local-foreign context; means of communication; reinterpretation and redefinition of concepts. In conclusion, I consider how people and cultural patterns at Tshianzwane, through interpenetration, form progressing and changing social web; social connections; attachments; trance; state of flux in cultural patterns; synthesis of cultural patterns; embedded contexts; shared culture and resultant cultural patterns. Since cultural patterns, as a result of interpenetration, reflect each other, I point out the challenges in socio-spatial mapping of forms of habitus and cultural patterns. In my dissertation, I use John Blacking‘s work as my primary theoretical framework. Furthermore, I use Pierre Bourdieu‘s theoretical framework, and Hugh Tracey‘s and David Dargie‘s audio CDs on African tribal music to enrich my theoretical ground. I collected my field data at Tshianzwane in collaboration with Joseph Morake and Ignatia Madalane (students), Dr Susan Harrop-Allin (supervisor), Samson Netshifhefhe, Obert Ramashia, Paul Munyai and Musiwalo (informants). / M. Mus. / Art History, Visual Arts and Musicology