Highly alkylated cyclohexanes. X-Ray crystal structures, force-field calculations, and conformations of cis/trans-1,4-disubstituted cyclohexane isomers

The structures of mesylated cis- and trans-tetramethylshisool cis- 2 and trans-2 have been elucidated by single-crystal X-ray techniques. In cis-2 the isopropenyl group adopts an axial position in the crystal, and the structural data obtained are in good agreement with those from force-field calculations. In trans-2 the two rotamers arising from rotation of the isopropenyl group were assigned by NOE measurements. Comparison of the spectroscopic data with those of other tetramethyllimonene derivatives showed that these can be classified into compounds with preferred equatorial and preferred axial position of the isopropenyl group

Analysis of the performance of the drive system and diffuser of the Langley unitary plan wind tunnel

A broad program was initiated at the Langley Research Center in 1973 to reduce the energy consumption of the laboratory. As a part of this program, the performance characteristics of the Unitary Plan Wind Tunnel were reexamined to determine if potential methods for incresing the operating efficiencies of the tunnel could be formulated. The results of that study are summarized. The performance characteristics of the drive system components and the variable-geometry diffuser system of the tunnel are documented and analyzed. Several potential methods for reducing the energy requirements of the facility are discussed

Scripture in the Theologies of W. Pannenberg and D. G. Bloesch: an Investigation and Assessment of its Origin, Nature, and Use

Scripture has played an authoritative role in Christian theology for centuries and has been at the heart of Protestant theology from its beginning. The rise of modern historical criticism, however, has led to a crisis at this very foundation of Protestant theology. In this context this dissertation seeks to set forth, analyze, compare, and evaluate theconcept of Scripture in the theologies of two contemporary Protestant systematic theologians who represent significantly different concepts of Scripture: Wolfhart Pannenberg and Donald G. Bloesch. Chapter 1 provides a brief introduction, delineates the objectives, research methodology, and delimitations of the study. This is followed in chapter 2, by an issue-oriented overview of the concepts of Scripture in theology, that have surfaced from the time of the Protestant Reformation onward. This oveview describes the positions of important theological representatives who significantly influenced the concept of Scripture in church history up to the present time. Chapter 3 focuses on Wolfgang Pannenberg\u27s concept of Scripture by first describing his understanding of Scripture\u27s origin, nature, and use; then the second part of this chapter analyzes the theological and anthropological presuppositions which have influenced Pannenberg\u27s concept of Scripture. Chapter 4 treats Donald G. Bloesch\u27s view of Scripture, following the same pattern as in chapter 3. Chapter 5 compares the positions of Pannenberg and Bloesch, evaluating them on the basis of internal consistency. The assumptions and presuppositions upon which the respective positions seem to rest are also taken into consideration. It appears that despite the fundamentally different starting points and other significant differences, Pannenberg and Bloesch nevertheless reveal a number of surprising similarities in their views of Scripture. This would seem to suggest that for both theologians the concept of Scripture is determined ultimately by presuppositions that are derived and shaped extra scripturam