Surface Acoustic Wave delay lines have been used as probes for chemical analysis. The interaction between matter adjacent to the SAW device surface and the propagating Raleigh wave caused measurable changes in the amplitude, phase and resonant frequency of the wave. The effectiveness of various electronic detection schemes was evaluated along with the response of the device to changes in pressure and temperature. A lithium niobate SAW device was used as a detector for gas chromatography. Frequency shifts of a SAW oscillator provided the highest sensitivity to compounds eluting from the G.C. column. Sensitivity and specificity of the detector to polar and non-polar organic compounds was greatly enhanced by thin chemical coatings applied to the detector surface. Submicrogram quantities of material were easily detected. Linearity and dynamic range of the detection system was poor. Numerous refinements remain to be made which could significantly improve performance. Thermomechanical analysis of thin polymer films were accomplished using a 32 MHz quartz delay line. Very large wave amplitude shifts were observed as the polymer reached its glass transition temperature. Tg measurements were performed on samples clamped to the surface and cast on the surface. Agreement with low frequency dynamic mechanical measurements was good for the clamped specimens, indicating the absence of wave coupling. Specimens cast on the surface experienced large Tg shifts and therefore were coupled to the surface wave. More subtle transitions were also detected. A crystalline transition around room temperature in a TEFLON film clamped to the SAW device provided an easily observed shift in SAW amplitude. Explanations of this behavior have been proposed. The SAW device also provided an ideal vehicle for examining the behavior of thin photoresist films on the surface. Information on solvent evaporation processes and photo-induced crosslinking rate was obtained. The attractive features of the device for polymer thermomechanical analysis include low cost, ruggedness, high sensitivity and ease of use. / Ph. D.

The purposes of this study were to investigate consumer satisfaction, preferences, and care procedures of selected nightgown fabrics. Additionally, demographic information was obtained to characterize the sample. The data were provided by 54 females in Delaware, Massachusetts, Pennsylvania, New York, Rhode Island, Vermont, and Virginia. Eight subjects, each wearing two different gown fabrics participated from five states; however, one participant each from Massachusetts and Vermont was disqualified. The four fabrics used in this study, representative of those available in the marketplace for the manufacture of ladies sleepwear, were made from: (1) 100% polyester, pink, brushed knit, (2) 100% nylon, lavender tricot, (3) 80/20% acetate-polyester, blue-green, brushed knit, and (4) 80/20% acetate-nylong, yellow-green, brushed knit. Preliminary and terminal interview questionnaires were used to collect the data as well as satisfaction ratings cards. Frequency distributions and percentages were used to characterize the findings from this study. Participants tended to be fairly young, well educated and dwellers of single family houses. The majority earned incomes in excess of $10,000. Automatic washers and dryers were used predominately. A variety of textile goods were laundered in the same loads as the sleepwear. Wearers indicated preferences for one or the other of the two gowns on each of the following factors: ease of soil removal, colorfastness, shape retention, appearance, hand, and durability. The 100% polyester, brushed knit fabric was preferred overall, but other fabrics received higher ratings on individual factors. On satisfaction factors, hand and ease of care were the most pleasing characteristics. Static electricity continues to be a problem. Satisfaction scores were somewhat parallel to preferences. / Master of Science

This thesis provides a survey of the procedures used throughout the 50 United States for assessing forest properties for general property tax purposes. A similar survey was completed in 1966. However, state guides for assessing forest properties have changed considerably since then and these developments have been analyzed. As a result of this analysis three points stand out: (l) States are assuming a greater role in guiding the assessment of forest lands. (2) The more recent guides that provide detailed instructions are designed to determine forest property values based on productivity. (3) The newer guides are designed for greater ease of administration and uniformity. / Master of Science

William Styron is one of the most respected and frequently studied authors of his generation. Critical recognition of his role as a shaping force in post-modernist fiction has resulted in the production of a large body of published work: a full-scale descriptive primary bibliography and an extensive annotated secondary one; a collection of recent Styron criticism; and two published casebooks that explore Styron's most recent novel, The Confessions of Nat Turner. Traditional scholarly study of Styron's work is, however, sorely lacking. This study addresses this need by examining several extant Styron manuscripts: Chapter I deals with the holograph manuscript, the “working" typescript, and the "editorial" typescript of Styron's first novel, Lie Down in Darkness (1951). Chapter II treats the unpublished discarded opening to the author's second novel, Set This House on Fire (1960). The final chapter focuses on Styron's annotations on the endpapers of his copy of William S. Drewry's The Southampton Insurrection, an important source for The Confessions of Nat Turner (1967). These documents supply clues to Styron's compositional method and therefore add to our understanding of the author, his fictions, and his reading public. / Master of Arts

Modal analysis on slabs, thin section petrography, microprobe analyses, and geological mapping have been performed on the Mount Airy granite and enclosing country rock. The pluton.is unzoned, simply intruded, and composed of a medium-grained, white granite, containing 33-41% plagioclase (An₁₀₋₂₀), 27-35% quartz, 20-28% alkali feldspar (Or₉₀), and 3-13% color index minerals, primarily biotite, muscovite, and epidote. A more granodiorite aplite phase intrudes the granite and is composed of An₉₋₃ plagioclase, Or₉₅ alkali feldspar, quartz, apatite, muscovite, biotite, and traces of epidote and zircon, and garnet. Aplite is a late segregation of granite and is associated with pegmatite. The enclosing country rock is amphibolite, pelitic schist, and pin-striped gneiss of the Alligator Back Formation. The pelites in contact with the granite on the southeast side have the assemblage garnet + biotite + staurolite consistent with the albite-epidote amphibolite facies metamorphism of the region. The granite has deformed the prior Ordovician foliation of the country rock and is itself cut by shears and folds close to the Brevard Zone. These are the result of Devonian-Mississippian movement on the Brevard. Some of the muscovite is primary in the granite, and epidote is not. Most of the muscovite, sphene, and low-An plagioclase are subsolidus. Alteration of biotite and plagioclase show an early, water-rich fluid evolving into a more CO₂-rich fluid as the rocks cooled. An injection temperature of 700-750°C and pressure of at least 5.5-7 Kbar is consistent with the mineral assemblages seen in the granite, xenoliths, and contact country rocks. The notable lack of hydrothermal activity at the granite margins is attributed to low H₂O content of the original magma and hydration reactions within the granite below the solidus. / Master of Science

The computer simulation language written in Fortran was used to model the Navy's PHALANX Mount and Antenna Compensation Network. This network is a feedback control system that filters out the effects of surface ship motion on a weapon's response to commands from the ship's fire control center. The network includes a number of non-standard elements that prevent mathematical prediction of its closed-loop response; therefore, a computer model was required to predict the network's output. The computer models were developed, validated and tested with a number of different inputs. The resultant outputs were compared with actual test data taken from a functional PHALANX mount compensation network. / Master of Science

The esterification of amino acids to the tRNA-like structures of viral genomic RNA was studied as catalyzed by amino acyl tRNA synthetases from E. coli, yeast, bean and rat. Peanut stunt virus RNA was esterified with tyrosine in the presence of bean tyrosyl-tRNA synthetase to a maximum of 22 mole percent (average MW = 1 x 10⁶ ). The rate of TYMV-RNA aminoacylation was extensively studied. In the presence of enzymes from E. coli, yeast and bean, the rate of aminoacylation was inhibited 4 fold by 47.5 mM KCl. In the presence of rat enzyme a 1.5 fold increase in rate was observed. In identical studies using tRNA, added KCl generally favored aminoacylation of tRNA by the homologous enzyme but disfavored heterologous reactions. The kinetic parameters (K_m and V_max of TYMV-RNA aminoacylation in the presence of valyl-tRNA synthetases from the four sources were determined and compared to results obtained for yeast and E. coli tRNA controls. TYMV-RNA was found to be a uniquely competent and versatile substrate as compared to tRNA. The K_m of yeast valyl-tRNA synthetase for TYMV-RNA (7 nM) is the second lowest K_m reported for any aminoacyl tRNA synthetase. Kinetic studies using TYMV-RNA with or without the 3' terminal AMP indicate that this AMP is involved in the binding of TYMV-RNA to yeast valyl-tRNA synthetase. / Master of Science

An evaluation was made of the performance of 48 11 x 63 11 , reversible, doubleface, wing-type, two-way entry, nailed red-oak, stevedore pallets of two designs assembled with four different nails. Special consideration was given to Brazilian situations in the light of the interest of the author in the industrial potential of Brazil. The pallets of improved design had their top and bottom leading-edge deckboards backed up by follow-up deckboards. Furthermore, four nails, instead of three, were used for fastening the leading-edge deckboards and three nai Is, instead of two, were used for fastening the inner deckboards to each stringer. The sequence of tests on each pallet started with the initial stiffness test, followed by the rigidity test, the impact-incline deckboard-stringer separation test, and the follow-up static stiff,!'1ess and load-carrying capacity tests. The pallets of improved design were better than those of conventional design during all tests performed. The influence of the nails on pallet performance was significantly different only during the performance of the rigidity and impact-incline tests. During the latter test, the pallets of improved design assembled with 311 helically threaded hardened-steel nails were, on the average, 66 times better than the conventional pallets assembled with the Brazilian 2 ½” helically fluted nails. Recommendations were advanced, suggesting that the study be continued and that special consideration be given to the wood species available in Brazil for pallet assembly, to the use of improved nails, and to the environmental conditions under which stevedore pallets are exposed. / Master of Science

An experimental study of the ignition of liquid fuels injected transverse to a hot supersonic (M=1.65) air stream was conducted. The liquids considered were kerosene, CS₂ and water as an inert control. The major variables were: air stagnation temperature in the range 1500 to 2300ºF, injectant flow rate and injection angles from 90º to 45º upstream. The experimental observations were: temperature measurements on the wall near the injector and in the flow downstream of injection self-luminosity photographs and infrared photographs taken with a Thermographic camera. Special attention was directed at the behavior of the liquid layer that had previously been found to form near the injector. No unequivocal evidence of ignition of either fuel was found for normal injection at these conditions. However, clear evidence of ignition of CS₂ was found for the upstream injection angle for T_o ≥ 2030°F and 80 ≤ P_j ≤ 135 psi. Higher injection pressures and thus high flow rates failed to produce ignition at any temperature tested. Evidence of CS₂ ignition was found in the infrared photographs and wall and in-stream temperature measurements simultaneously. The infrared photograph indicated possible ignition of the kerosene for upstream injection, but this could not be corroborated with the temperature measurements. / Master of Science

This study includes an examination of the attitudes which have shaped American domestic architecture, and an explanation of how the symbolic language of American suburban areas is important to the design of suburban residential development. A design case study is included, which illustrates how a concern for the preservation of the symbolic content of suburban form can be integrated with a desire to reduce the wasteful land coverage of the typical suburban settlement, in order to produce a new suburban pattern. Selected drawings and tables are used to illustrate the text, and to help explain the rationale behind the design case study. / Master of Architecture