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This dissertation presents an investigation on the long-term behavior and the structure-property relation in high performance polymeric fibers. These fibers have wide applications in structural cable and ropes and reinforced composites. Therefore, the understanding of their structure-property relation and their behavior under external mechanical stress is very important. The fatigue and creep behavior were studied. A general lifetime equation was derived to correlate the material lifetime with the applied stress level. The failure criterion of “critical strain” was identified. The failure mechanism was shown to be a deformation route. The fatigue lifetime was predicted from known material constants. Several material parameters were defined to characterize the fatigue and creep properties. The fatigue property is characterized by the fatigue strength and fatigue strength index; while the creep property is characterized by the creep strength and creep strength index. The fatigue strength index was used to show that fiber with a rigid chain structure, such as Kevlar®, Techanora ® and Vectran®, generally have better fatigue resistance than a flexible chain fiber, such as Spectra®. Twisting was found to influence yarn properties. A model based on composite theory was developed to predict the change in the yarn modulus with the degree of twist. The desire for nondestructive prediction of the residual lifetime of a used material initiated the efforts to find a signature of the stress and thermal history in Kevlar® fibers. To achieve this, a new testing methodology has been developed. An iso-strain force-temperature test (IFTT) was shown to yield quantitative information on the stress and thermal history as well as the information of relaxation and transitions in many materials. The IFTT behavior of a Kevlar® fiber maps well with its structure examined by X-ray diffraction. The IFTT was also used to screen the processing for property enhancement via post-treatment. Different post-treatment routes have been investigated for Kevlar ® fiber. Tension, heat, hydrostatic pressure, and different media of water, mercury and silicon oil have been utilized to alter the materials. The evolution of its property and structure have been carefully examined. It is shown that the modulus of PPTA is determined by two structure parameters: misorientation and a paracrystalline parameter.

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Master of Science / Department of Apparel, Textiles, and Interior Design / Diana Sindicich / With continuing advancements in the area of electronics, there are more ways in which they are utilized in order to improve the lives of humans. These advancements have to led to the incorporation of electronic components into fabric structures, creating electronic textiles (e-textiles). As it has become possible to place small electrical components within clothing without the performance of the electronics being hampered, research has been conducted in the use of e-textiles in measuring aspects of the human body, such as the heart rate and perspiration rate. In the area of skin temperature, research has been conducted in the past using e-textiles for skin temperature measurement, but past efforts have been unsuccessful in incorporating useable temperature sensors into a fabric substrate. This study compared three types of sensors incorporated into woven and knitted fabrics, using insulated thermocouples, un-insulated thermocouples, and resistance temperature directors (RTDs). Three incorporation methods (weaving, interlacing into knit, and stitching) were used in six fabric samples, with the three sensor types woven and stitched into three woven fabric samples, while the sensors were interlaced into knitted fabric and stitched into the three knitted samples. Fabric hand washing and temperature measurement tests were conducted, and the temperature readings were analyzed statistically for comparison. The analysis conducted showed that the thermocouples that were interlaced or stitched onto the knitted fabric samples were best for temperature measurement due to their accuracy and durability, while the RTDs were unusable as a temperature sensor, as the removal of the electrical connectors during washing eliminated the calibration that was established before washing. This research was supported in part by the Institute for Environmental Research at Kansas State University.

<p> This research explored Jung&rsquo;s development of the concept of soul and its manifestation in the material world. In particular, this phenomenological study investigated Hillman&rsquo;s anima mundi, the soul in and of the world, and how individual and community transformation occurred through the making of traditional Hawaiian quilts by hand. Using qualitative organic inquiry, ten participants including the researcher were asked to describe their emotional, psychological, and relational experiences of quiltmaking&mdash;thus integrating the handmade art into the very heart of this dissertation. The findings validated the social, healthful, and emotional benefits of quiltmaking by hand, having strong implications for clinical work and the process of individuation. Individuation achieved through the making and completion of one&rsquo;s quilt was not just the creative journey of an individual soul, but a shared community endeavor that created enduring social bonds serving to perpetuate the tradition of Hawaiian quiltmaking. One of the most significant findings addressed Jung&rsquo;s belief that soul lives among us in the material world. Further studies might examine individual and co-creative endeavors to compare creative, social, and transformational experiences. Also, further exploration into Jung&rsquo;s notion of the soul of the object may deepen our understanding of soul and its delivery into the tangible world through the work of our hands. </p><p> <i>Keywords:</i> depth psychology, Jungian soul of object, transformation, traditional Hawaiian quiltmaking, creativity, collective experience. </p>

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Thesis (Ph.D.)--University of Leeds, 1922. / Holograph. Caption title. Includes photocopies of the report of the Royal Commission to Investigate the Possibilities of Musk-ox Industries in the Arctic and Sub-arctic regions of Canada, and a letter from W.T. Hornaday, Curator, New York Zoological Society addressed to the Commission concerning the viability of domestic music ox herds. Contents: v.1. Thesis, Ovibos fibre -- v.2 Samples, Ovibos (musk ox) fibre.