In this study of the genitalia and spermathecae of the Rhynohophora, eighty-two species, representing sixty genera, were examined as listed in Leng's Catalogue of Coleoptera of North America North of Mexico, together with seven species from the Phillippine Islands and one from China. By using the external female genitalia and spermathecae the Rhynochophora studied may be divided into eight and possibly nine well-defined groups. They are separated into these groups on the basis of the development of the nodulus and ramus and upon the degree of crenulation that occurs in the spermatheca. The spermatheca of all species studied has been figured, but it was beyond the scope of this study to make drawings of all the external female genital structures. I have therefore figured the genitalia of only a few of the species dealt with in this study. The Rhynochophora examined have sustantiated, with few exceptions, the arrangement followed in Leng's Catalogue of Coleoptera and Boving's study based on the larval forms. No final conclusions have been reached regarding the taxonomy and phylogeny of the Rhynochophora but only the results from a study of the female genitalia and spermathecae. The evolution of the genitalia has been from the complex to the simple structures, the Brentidae and Platystomidae are the most primitive and the Scolytidae are the most recent. The spermathaca appears to have evolved from the simple to the complex and then back to the simple form. The specific characters of these structures are very useful guides and should be utilized in future taxonomic work. They are of value in generic as well as specific separation. Where closely related species of the same genus were investigated, notable differences were found in the genitalia and spermatheca. In this paper one hundred and seventeen drawings have been included to show the value of the genitalia nd spermatheca as a medium for identification of the different species.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN. / Accompanied by 3 folded plates in envelope inserted in back cover. / Bibliography: leaves 165-170. / by Gary James Axen. / M.S.

This sociological study investigates the effects of work stress on family dynamics. Job demands, like heavy workload and working overtime, could have an effect on family members to fulfill role obligations and vital family functions according to Parsons’s, Murdock’s and Merton’s functionalist theories. By employing qualitative research techniques, fifty in-depth interviews guided by an interview schedule are conducted. The three research questions or tentative hypotheses, based on the functionalist theory, are answered by the findings from the data gathered. An inductive strategy is used to gather and interpret data to eventually build new theory. Theory is grounded in the data, hence grounded theory. The findings are categorized in terms of the research questions and describe and explain how the family is affected when work stress is experienced by the employee and family member. Possible explanations are offered as to why this occurs. Recommendations for further research are also made. / Sociology / M.A. (Sociology)

This sociological study investigates the effects of work stress on family dynamics. Job demands, like heavy workload and working overtime, could have an effect on family members to fulfill role obligations and vital family functions according to Parsons’s, Murdock’s and Merton’s functionalist theories. By employing qualitative research techniques, fifty in-depth interviews guided by an interview schedule are conducted. The three research questions or tentative hypotheses, based on the functionalist theory, are answered by the findings from the data gathered. An inductive strategy is used to gather and interpret data to eventually build new theory. Theory is grounded in the data, hence grounded theory. The findings are categorized in terms of the research questions and describe and explain how the family is affected when work stress is experienced by the employee and family member. Possible explanations are offered as to why this occurs. Recommendations for further research are also made. / Sociology / M.A. (Sociology)

No description available.

Uneconomic epithermal precious metal mineralization and associated alteration occur in the Tonopah Property, and are similar in style, although much less intense, to the deposits of the Tonopah camp two miles south. Mineralization is localized within a set of northwest-trending faults within the Tonopah, Mizpah, and King Tonopah Member of the Fraction-Tuff formations, and is associated with widespread propylitic and sparse fracture-localized potassic and argillic alteration. A younger set of Mn-calcite veins, anomalous in manganese, mercury, arsenic, and antimony, occurs in northeast-trending faults cutting older formations as well as the younger Tonopah Summit Member of the Fraction Tuff. This mineralization is possibly associated with silicification, zeolitization, and clay-alteration of the Fraction Tuff. The Tonopah Summit Member of the Fraction Tuff is reinterpreted as younger than the King Tonopah Member. Mega-breccia and basin morphology in the northeast may indicate an eruptive vent in this area.

This collection of work contains poems that are attempting to reach a sense of understanding about the past in regard to place, landscape, architecture, and memory in relation to the self--the speaker, the self-imposed I. The perception of memory, and in particular the prevalence of false memories surrounding place and person are of major concern in this collection, along with the historical and personal narratives moving out of a voice rooted in the Mojave Desert, and in particular, Las Vegas, Nevada. These poems are working through the speaker’s complicated relationship with the desert, and the erosion of place, of home. These poems are an effort to recognize what it means to learn from the desert, to learn from Las Vegas.

Graduation date: 1996

Yucca Mountain was designated as the proposed high-level radioactive waste repository by the U.S. Government in 1987. The proposed repository design requires high safety for a long maintenance period of 10,000 years. To satisfy this requirement, evaluation of the influence of earthquakes on the repository is necessary. Prediction of earthquake-induced ground motions around the repository requires knowledge of the dynamic properties of the geologic materials around the repository. The main geologic materials in the vicinity of Yucca Mountain are tuffs (ignimbrites) which are formed by the deposition of volcanic ash mixed with erupted volcanic gas, water vapor and pyroclastic material. Two types of dynamic tests, (1) the free-free, unconfined, resonant column and direct arrival test (freefree URC test) and (2) the fixed-free resonant column and torsional shear test (fixed-free RCTS test), were used to measure the dynamic properties of tuffs. The emphasis in this dynamic testing was evaluation of shear modulus (G) and material damping ratio (D) of the tuffs in the small-strain (linear) and mildly nonlinear (to strains of about 0.02 %) ranges. To evaluate the influence of various parameters on G and D of tuffs, correlations with other features such as total unit weight, porosity and stratigraphic unit were performed and general relationships between them are proposed. In addition, an unconfined, slow-cyclic torsional shear (CTS) device was developed and used to measure the cyclic shear properties of the tuffs from Yucca Mountain at larger strain amplitudes than possible in the fixed-free RCTS tests. Additionally, the CTS device was also used to determine the shear failure strength of the tuffs. By combining the cyclic shear properties of the tuffs from the CTS tests and the dynamic properties of the tuffs from the fixed-free RCTS tests, complete dynamic property curves from small-strain to failure strain were evaluated. / text

No description available.