High-temperature /1100 degrees F/ capacitors operate without supplement cooling

Multilayered capacitor with one-mil thick pyrolytic boron nitride and wrap around sputtered electrodes achieves parallel electrical interconnections in a stacked configuration of 3 to 9 wafers. These capacitors are compact, lightweight, and suitable for operation in high temperatures without supplemental cooling

Development of an 1100 deg F capacitor

The feasibility of developing a high temperature capacitor for 1100 F operation which is as small and light as conventional capacitors for normal operating temperatures is discussed. Pyrolyic boron nitride (PBN) was selected for the dielectric. The PBN capacitors were made by slicing and lapping material from thick blocks and then sputtering thin film electrodes. These capacitors had breakdown strengths of 7,000 volts per mil and a dissipation factor of less than 0.001 at 1100 F. Additional processing improvements were made after testing a multi-layer or stacked PBN capacitor for 1,000 hours at 1100 F. Sputter etching the wafers before depositing electrodes resulted in a reduction in dissipation factor. A sputtered boron nitride film applied to the outer electrode surfaces produced a more stable capacitor. A design for a 0.1 mu F capacitor and a summary of PBN wafer fabrication costs are given

Planktonic foraminifera and calcareous nannofossils at the Cretaceous-Tertiary contact in Zululand

Assemblages of planktonic foraminifera and calcareous nannofossils for the Maestrichtian and Danian of Zululand are listed and illustrated. The Globotruncana gansseri and G. mayorensis foraminiferal zones are present in the Maestrichtian. The Globigerina triloculinoides and Globorotalia compressa foraminiferal subzones are present in the Danian. The Maestrichtian in this area cannot be subdivided on the basis of calcareous nannofossils. Danian nannofossil zones present are those of Cruciplacolithus tenuis and Chiasmolithus danicus . The Cretaceous-Tertiary faunal extinctions are briefly discussed and it is concluded that lowered temperatures were a factor in this extinction.CSI

Positive Workplace Dynamics: A Qualitative Exploration of Exceptional Performance in Community College Units

In this companion dissertation findings are reported of applied case study research on four community college organizational units that consistently meet or exceed standard performance measures. Ample prior evidence confirmed that performance extended significantly beyond what might be explained by available tangible resources alone. The case study contexts are common in higher education in general: a) an external partnership, (b) an ad hoc team, (c) a traditional, cross-divisional service unit, and (d) a grant-funded student service unit. Emerging positive organizational theory and research shows promise for revealing performance-influencing phenomena and behaviors that are not adequately represented in standard measures. Therefore, this collaborative case study research was designed to explore positive influences on the success of the four community college units. The companion dissertation consists of three manuscripts. Chapter 2, a technical report, is a collaboratively-written synthesis of findings from the four individual case studies. Key findings across the units suggest the influence on performance of: (a) a people-first culture, (b) authentic, trusting, inclusive leadership, and (c) resource richness beyond constrained tangible resources. In Chapter 3, the author presents in journal article format one of the case studies that contributed to the findings reported in Chapter 2. The academic library chosen for this research serves an urban community college campus near the geographic center of its city. The research asks how the library consistently performs well despite severe budget and staffing constraints and a series of disruptive events. Key findings in Chapter 3 include the following influences on performance: (a) valuing people and building relationships; (b) a culture of service that shares duties, resources, and expertise; and (c) leadership that effectively translates formal goals into an enabling matrix of behaviors and phenomena. In Chapter 4, a scholarly narrative, the author reflects on transformative aspects of the doctoral experience on learning and life. Practical recommendations are offered. Additional research is needed to explore causal relationships, how to influence greater resource amplification, and how to increase awareness of positive organizational dynamics

Watershed Land Uses and Phosphorus Export Coefficient Relationships: A Planning Tool for Lake Resources Management

Relationships between nonpoint source pollutant loadings and water quality degradation in lakes have been established. However, practical methodologies necessary to identify and manage nonpoint sources in accordance with lake water quality indices have been lacking. Objectives of the current study were as follows: (1) to compare predicted model values for in-lake total phosphorus (TP) concentrations with actual values; and (2) to determine the applicability of areal phosphorus loading models for lake resources management. The research site was located 19 km west of the City of Little Rock in the Lake Maumelle basin. Areal total phosphorus (TP) loadings in g m^-2yr^-1 were calculated for existing and projected watershed land uses for the period of 1985 to 2005. Model predictions for in-lake TP concentrations yielded .0204 mg 1^-1 and .0223 mg 1^-1 for the years 1985 and 2005, respectively. An average summertime TP value of .0280 mg 1^-1 was measured in Lake Maumelle. The predicted TP value was not significantly different from the measured TP value. This model offers a practical planning approach for managing lake resources when phosphorus limited conditions are present

Income Security for Workers: A Stressed Support System in Need of Innovation

The current mix of public and private programs to support workers after they experience disability onset provides benefits to millions of workers and former workers. Yet, despite the large and growing costs of these programs, the inflation-adjusted household incomes of workers with disabilities have been falling for over two decades, both absolutely and, especially, relative to the incomes of those without disabilities. The aging of the baby boom generation is likely to make matters worse, and the government’s fiscal circumstance will make it increasingly difficult to sustain existing public programs. Current public policy initiatives might eventually improve the disability support system, but they are not likely to ward off the adverse consequences of the pending crisis. Policy changes that leverage existing private sector practices and capabilities might achieve greater success, but have received little attention and are far from proven

High temperature capacitor development

High temperature stability and electrical properties of pyrolytic boron nitride capacitor

The Impact of Shape on the Perception of Euler Diagrams

Euler diagrams are often used for visualizing data collected into sets. However, there is a significant lack of guidance regarding graphical choices for Euler diagram layout. To address this deficiency, this paper asks the question `does the shape of a closed curve affect a user's comprehension of an Euler diagram?' By empirical study, we establish that curve shape does indeed impact on understandability. Our analysis of performance data indicates that circles perform best, followed by squares, with ellipses and rectangles jointly performing worst. We conclude that, where possible, circles should be used to draw effective Euler diagrams. Further, the ability to discriminate curves from zones and the symmetry of the curve shapes is argued to be important. We utilize perceptual theory to explain these results. As a consequence of this research, improved diagram layout decisions can be made for Euler diagrams whether they are manually or automatically drawn

Poetry of the Cape of Good Hope

https://commons.und.edu/settler-literature/1208/thumbnail.jp

High-temperature capacitor feasibility

High purity dielectric materials tested in capacitors at high temperature