Waterfowl Harvest and Hunter Use at Carlyle Lake During the 1973 Season

Division of Wildlife Resources Migratory Bird Section, Periodic Report No. 7Report issued on: April 15, 197

Global Coverage By Banked Aeroglide Atmospheric Entry

Global Coverage is defined as the capability of an atmospheric entry vehicle to return to any point on the globe following descent from any orbit. Global Coverage is not possible with current aerospace vehicle systems, but advanced lifting systems offer this promise. Spherical earth analytical results are presented showing a possible bank-speed schedule (the minor circle turn) and the necessary lift-drag ratio for Global Coverage as a function of initial atmospheric entry speed and other relevant parameters. Global Coverage is available for entry at circular speed for L/D \u3e 3.56; for -entry at parabolic entry speed for L/D \u3e 2.34. Comparision with optimized bank programs give indication that this minor circle maneuver is close to optimum and will provide a practical guidance scheme for controlled atmospheric entry from space

The Use of Technology in Revolutionizing Academia

The American University system is undergoing a thorough revolution, as can be seen from the most casual, perusal of the newspapers or from serious discussions. 1 A dozen irritated Canadians recently presented a series of essays which entertained the horrifying possibility that the present University is now so bad as to be irrelevant to education! 2 For example, they ask if the University has degenerated to just a training school of necessary personnel for corporate industry requirements, The Multiversity is a place in which the claim of institutional continuity and efficiency come to head-on collision with its educational aims; the latter are normally wiped off the map. (Reference 2, p. 74). Such criticisms are also found in the caveats of the serious drop-out and hippie critic of our establishment. Paul Krassner, The Mr. Yippie, recently suggested that the Yippies were the prototype of the totally-leisure class which could soon be the result of our technological advances. Perhaps a continuous commitment to life-long education would provide the leisure civilization with viable activities

Future Trends in Graduate TV Instruction

The University of Florida has run a major graduate program in Engineering using microwave television for several years now (ref. 1). Initially called GENESYS, our system has presented 350 courses over seven semesters and two quarters. Student enrollment is in the order of 600, all taking graduate courses in engineering. Recently this TV system was given a broader scope and renamed SUNSTAR (State UNiversity .System for Television And R.adio) . Professional offerings other than engineering are envisioned and participation by other state universities will be possible. This expansion is to be welcomed and even further expansion to regional or national university systems may be possible in the more distant future. Our GENESYS network has already demonstrated an experimental lecture tie with Huntsville, Alabama. The promise and problems of advanced media instruction are many. To scale the magnitude of the educational requirements in the coming days, I refer to some of the projections. Engineering Ph.D. production in the United States is increasing at a rate of 12% per annum (ref. 2). The Master Degree output also increases at a rate of 11%, projecting to the conclusion that by 1990 every engineer will hold a Master f s Degree (ref.3). Other new degrees are being more widely used, such as the Engineer degree and the Doctor of Engineering, which may, in time, be more utilized than some present degrees. The problem of employed students obtaining graduate instruction, including the all important graduate degree, will become more severe as the possession of this gra£aate degree becomes more usual

Generalized Dissociating Gas Flow

A generalized approach to the one-dimensional flow of a dissociated gas is presented. The flow is characterized by the flow parameters F, G, H, and I, and the degree of dissociation, which are defined. The equation of state and the equations for the dynamic and thermodynamic properties of the gas are presented for the dissociating gas. Equations are presented which give the aerothermodynamic flow properties as a function of the degree of dissociation, the frozen flow Mach number MF, and the initial values of G, H, and I for any arbitrary given flight condition. These equations are solved for the limiting subsonic and hypersonic solutions for the flow variables as the frozen flow Mach number MF tends towards zero and infinity, respectively. Several aspects of the physical significance of these results are discussed from the point of view of atmospheric planetary entry of an aerospace vehicle. The generalized nondimensional flow function F is defined in terms of the flow parameters G, H, and I , and is also given as a function of MF, H, and a, in general. This functional relationship is displayed in graphical form which is useful for determining various aspects of the resulting flow, and providing further insight into the flow process under consideration. Specifically, several flow regimes are delineated

Synthesis and evaluation of halogenated nitrophenoxazinones as nitroreductase substrates for the detection of pathogenic bacteria

The synthesis and microbiological evaluation of 7-, 8- and 9-nitro-1,2,4-trihalogenophenoxazin-3-one substrates with potential in the detection of nitroreductase-expressing pathogenic microorganisms are described. The 7- and 9-nitrotrihalogenophenoxazinone substrates were reduced by most Gram negative microorganisms and were inhibitory to the growth of certain Gram positive bacteria; however, the majority of Gram positive strains that were not inhibited by these agents, along with the two yeast strains evaluated, did not reduce the substrates. These observations suggest there are differences in the active site structures and substrate requirements of the nitroreductase enzymes from different strains; such differences may be exploited in the future for differentiation between pathogenic microorganisms. The absence of reduction of the 8-nitrotrihalogenophenoxazinone substrates is rationalized according to their electronic properties and correlates well with previous findings

A Techniques Manual And Video For The Management Of Problem Urban Canada Geese

Social and management problems associated with urban Canada geese (Branta canadensis) are increasing in area, scope and magnitude. Although there are many articles on the management of urban Canada geese, none provide enough information for a reader to understand the impact geese have on different people, the ecology of the urban goose, evaluate the effectiveness of potential control options, choose appropriate management techniques, and then implement the chosen techniques. The authors present a manual and video, which in combination, they believe are not deficient in any of these areas. The video is intended to increase the awareness and knowledge of human/goose conflicts in urban and suburban environments. The manual covers the biology of Canada geese relevant to problem management in an urban setting and a comprehensive list of management techniques. Detailed instructions for implementation, permit requirements, sources of equipment and supplies, and a discussion of advantages, disadvantages, and characteristics, are included for each technique. To assist in choosing and locating appropriate techniques, quick reference summary tables are included

Effects of sex chromosome dosage on corpus callosum morphology in supernumerary sex chromosome aneuploidies.

BackgroundSupernumerary sex chromosome aneuploidies (sSCA) are characterized by the presence of one or more additional sex chromosomes in an individual's karyotype; they affect around 1 in 400 individuals. Although there is high variability, each sSCA subtype has a characteristic set of cognitive and physical phenotypes. Here, we investigated the differences in the morphometry of the human corpus callosum (CC) between sex-matched controls 46,XY (N =99), 46,XX (N =93), and six unique sSCA karyotypes: 47,XYY (N =29), 47,XXY (N =58), 48,XXYY (N =20), 47,XXX (N =30), 48,XXXY (N =5), and 49,XXXXY (N =6).MethodsWe investigated CC morphometry using local and global area, local curvature of the CC boundary, and between-landmark distance analysis (BLDA). We hypothesized that CC morphometry would vary differentially along a proposed spectrum of Y:X chromosome ratio with supernumerary Y karyotypes having the largest CC areas and supernumerary X karyotypes having significantly smaller CC areas. To investigate this, we defined an sSCA spectrum based on a descending Y:X karyotype ratio: 47,XYY, 46,XY, 48,XXYY, 47,XXY, 48,XXXY, 49,XXXXY, 46,XX, 47,XXX. We similarly explored the effects of both X and Y chromosome numbers within sex. Results of shape-based metrics were analyzed using permutation tests consisting of 5,000 iterations.ResultsSeveral subregional areas, local curvature, and BLDs differed between groups. Moderate associations were found between area and curvature in relation to the spectrum and X and Y chromosome counts. BLD was strongly associated with X chromosome count in both male and female groups.ConclusionsOur results suggest that X- and Y-linked genes have differential effects on CC morphometry. To our knowledge, this is the first study to compare CC morphometry across these extremely rare groups

A tandem duplication within the fibrillin 1 gene is associated with the mouse tight skin mutation.

Mice carrying the Tight skin (Tsk) mutation have thickened skin and visceral fibrosis resulting from an accumulation of extracellular matrix molecules. These and other connective tissue abnormalities have made Tskl + mice models for scleroderma, hereditary emphysema, and myocardial hypertrophy. Previously we localized Tsk to mouse chromosome 2 in a region syntenic with human chromosome 15. The microfibrillar glycoprotein gene, fibrillin 1 (FBN1), on human chromosome 15q, provided a candidate for the Tsk mutation. We now demonstrate that the Tsk chromosome harbors a 30- to 40-kb genomic duplication within the Fbn1 gene that results in a larger than normal in-frame Fbn1 transcript. These findings provide hypotheses to explain some of the phenotypic characteristics of Tskl + mice and the lethality of Tsk/Tsk embryos