The Pulsed Plasma Thruster (PPT) is a low cost reliable electric propulsive device that has typical performance within the ranges; specific impulse 300 – 1700 s, Impulse bit 0.06 – 2.6 mN.s and thrust efficiency less than 20%. Past studies have focused on specific aspects to increase performance and understanding, i.e. late time ablation or current sheet canting. Although enlightening, they hav...

A unique ion-optical system for the production of high-intensity, short-lived radioactive nuclear beams has been designed, constructed and put into operation at the Nuclear Structure Laboratory at the University of Notre Dame as a joint project between the University of Michigan and NSL-UND. The system consists of a matched in-line pair of large-bore (30 cm) 6T sc solenoid magnets which act as ...

Political Ecology (PE) has been retrospectively created from a history of wide ranging work of different disciplines, cultural settings and epistemological foundations. Its conceptualization was and remains expansive, eclectic and inclusive which has brought both innovative thinking and charges of incoherence. A review of these paradoxical views on the quality of knowledge and its effectiveness...

In emerging economies, political institutions (i.e., government and its agencies), act as a major force in defining and mobilizing resources. IT entrepreneurial firms endeavor to obtain resources from political institutions, named as political institutional resources (PIRs), to overcome insurmountable handicap of resource deficiency. However, how PIRs matter remains unclear. Acknowledging this ...

Mining Political Blogs With Network Based Topic Models by Jiawei Liang Department of Statistical Science and Department of Economics Duke University

Resident participation in the political action committee (PAC) is important for professional advocacy and for ensuring access to quality musculoskeletal care. The following questions were asked: Would faculty contribution-matching increase donation rates and amounts among orthopedic surgery residents at a single institution? What barriers do residents self-identify that prevent or delay PAC par...

I start with two rough models of political theory (or philosophy: the dis tinction is not important here) with respect to the relation of morality to political practice. One is an enactment model. The model is that political theory formulates principles, concepts, ideals, and values; and politics (so far as it does what the theory wants) seeks to express these in political action, through persu...

How does the demand for lobbying reflected by government policy activity influence the use of lobbying strategies and tactics? The authors examine this question by assessing how the complexity of the policy space affects the political action committee (PAC) system. They hypothesize that the complexity of the policy space indirectly affects the size and activity of the PAC system through its dir...

Solid substrate cultures of moulds behave in quite a difTerent way to conventional submerged cultures. Catabolic repression often observed in submerged fermentation can easily be overcome by using solid state fermentation. A. niger strains can be grown by SSF technique with the following advantages: enzyme titres and productivity are usually higher; there is a tendency to early enzyme excretion...

The effects of lactose, galactose, glucose, and glucose combined with galactose on the induction of β–galactosidase by IPTG in Escherichia coli strain VC10, growing in a glycerol media, were compared against a control of glycerol plus IPTG. After inducing β– galactosidase production with the IPTG, the cultures were altered with the addition of one of the above carbohydrates or combinations. Thi...