Kennedy\u27s The first American Evangelical: A short life of Cotton Mather (Book Review)

A review of Kennedy, R. (2015). The first American Evangelical: A short life of Cotton Mather. Grand Rapids, MI: Eerdmans. 162 pp. $17.00. ISBN 978080287211

Micarta Propellers III : General Description of the Design

The design of propellers made of Micarta is discussed. The advantages of the material are noted, especially as compared with wood. The design changes necessitated by the use of Micarta are discussed with reference to the hub boss, the narrowing of the blade tips, the thinning of the blades, the angles of the leading and trailing edges, and the adjustment of the pitch. Results of flight tests show that the Micarta propeller gave a top speed of 2 miles per hour more than the wooden propeller while turning about 120 r.p.m slower, with about the same rate of climb. At top speed, the Micarta propeller shows an improvement of about 7 percent in fuel economy, although the plane is flying 2 miles per hour faster

Micarta propellers IV : technical methods of design

A description is given of the methods used in design of Micarta propellers. The most direct method for working out the design of a Micarta propeller is to start with the diameter and blade angles of a wooden propeller suited for a particular installation and then to apply one of the plan forms suitable for Micarta propellers. This allows one to obtain the corresponding blade widths and to then use these angles and blade widths for an aerodynamic analysis

Micarta propellers I : materials

Here, values for tension, compression edgewise of laminations, and transverse flatwise of laminations are given for Micarta made with various kinds of sheet material. The corresponding values for white oak are given for comparison. It was found by destructive and service tests that Micarta made with a good grade of cotton duck will give satisfactory service with most designs. In propellers having detachable blades, it is desirable that the root of the blade be of a small cross section to decrease the weight of the metal hub. Here the use of the special fabric or wood veneer offers advantages due to greater tensile strength. These materials, especially the wood veneer, produce stiffer blades than duck. This is also a value in controllable and reversible pitch designs where it is desirable that the plan form of the blades be symmetrical

Role of arginase 2 in systemic metabolic activity and adipose tissue fatty acid metabolism in diet-induced obese mice

Visceral adipose tissue (VAT) inflammation and metabolic dysregulation are key components of obesity-induced metabolic disease. Upregulated arginase, a ureahydrolase enzyme with two isoforms (A1-cytosolic and A2-mitochondrial), is implicated in pathologies associated with obesity and diabetes. This study examined A2 involvement in obesity-associated metabolic and vascular disorders. WT and globally deleted A2(−/−) or A1(+/−) mice were fed either a high fat/high sucrose (HFHS) diet or normal diet (ND) for 16 weeks. Increases in body and VAT weight of HFHS-fed WT mice were abrogated in A2−/−, but not A1+/−, mice. Additionally, A2−/− HFHS-fed mice exhibited higher energy expenditure, lower blood glucose, and insulin levels compared to WT HFHS mice. VAT and adipocytes from WT HFHS fed mice showed greater A2 expression and adipocyte size and reduced expression of PGC-1α, PPAR-γ, and adiponectin. A2 deletion blunted these effects, increased levels of active AMPK-α, and upregulated genes involved in fatty acid metabolism. A2 deletion prevented HFHS-induced VAT collagen deposition and inflammation, which are involved in adipocyte metabolic dysfunction. Endothelium-dependent vasorelaxation, impaired by HFHS diet, was significantly preserved in A2−/− mice, but more prominently maintained in A1+/− mice. In summary, A2 is critically involved in HFHS-induced VAT inflammation and metabolic dysfunction

Review of \u3ci\u3ePlains Indian Studies: A Collection of Essays in Honor of John C. Ewers and Waldo R. Wedel\u3c/i\u3e Edited by Douglas H. ubelaker and Herman J. Viola

A dual Festschrift is unusual, but here we have one celebrating a collective century of achievement by John Ewers and Waldo Wedel, two scholars of the first rank. Ewers and Wedel, long-time colleagues at the Smithsonian Institution, are well known to historians and anthropologists with special interests in the plains of North America. Indeed, each has contributed to the basic structure of their respective disciplines: Ewers essentially to ethnology and Wedel to archeology. Neither scholar worked within a strictly academic setting and thus, neither had students in the usual sense, yet Ewers and Wedel have been remarkably influential and are revered by scholars for their consistent excellence and originality. The papers presented here resulted from a celebratory symposium held at the Smithsonian Institution on 25 April 1980. The collection is introduced by informative (and evocative) biographies of Ewers and Wedel, the former by William N. Fenton, a long-time associate, and the latter by James H. Gunnerson, who shares continuing concerns in the archeology of the southwestern plains. Other contributions range from Reminiscences by T. Dale Stewart, now retired from a distinguished career at the Smithsonian, through Arikara and Pawnee folklore, to such recondite considerations as Bias in the Zooarcheological Record, with waystops at intercultural clothing exchange and the identification of Blood bands. The editors note that each paper focuses on some aspect of Plains Indian anthropology, but the approaches, topics, and problem-levels vary considerably .... The essays are not designed to follow a particular theme or to cover any assigned area .... the authors were asked to provide new original data in a manner that would admirably complement the career interests and accomplishments of the two great scholars (p. 3). Yet as frequently happens in symposium volumes, scholarly levels vary, although none of the papers descend to the totally trivial. In total they are informative and quite satisfying to the reader and, I suspect, to the honorees. The volume was worth the effort