Study and evaluation of electronography Final report

Photographic and electron photographic emulsion efficiencies calculated as function of densit

A spectroscopic study of LMC X-4

The orbital radial velocity semi-amplitude of the binary star system LMC X-4 primary was determined to be 37.9 + or - 2.4 km/s from measurements of the hydrogen absorption lines. The semi-amplitude of the He I and He II absorption lines are consistent with this, namely 44.9 + or - 5.0 and 37.3 + or - 5.3 km/s. The phase and shape of the radial velocity curves of the three ions are consistent with a circular orbit and an ephemeris based upon X-ray measurements of the neutron star, with the exception that the He II absorption line radial velocity curve has detectable shape distortion. Measurements of the He II LAMBOA 4686 emission line velocity are consistent with a phase shifted sine wave of semi-amplitude 535 km/s, a square wave of semi-amplitude 407 km/s, or high order harmonic fits. The spectral type was found to be 08.5 IV-V during X-ray eclipse. Variations to types as early as 07 occur, but not as a function or orbital phase. Absorption line peculiarities were noted on 6 of 58 spectra

Cowboys and the Imperial Ecology of Beef

Beef creates an emotional resonance that far outstrips its place within the market. In the 2000s, chicken may have dethroned beef as the most common meat on American plates, ending its reign since the 1940s, but most people do not seem to associate chicken breasts or poultry farmers with national identity the way Americans see ribeyes and cowboys as symbols of the nation's muscular, frontier past

A Liquid Crystal Model of Viral DNA Encapsidation

A liquid crystal continuum modeling framework for icosahedra bacteriophage viruses is developed and tested. The main assumptions of the model are the chromonic columnar hexagonal structure of confined DNA, the high resistance to bending and the phase transition from solid to fluid-like states as the concentration of DNA in the capsid decreases during infection. The model predicts osmotic pressure inside the capsid and the ejection force of the DNA as well as the size of the isotropic volume at the center of the capsid. Extensions of the model are discussed

Leadership Styles and Satisfaction: An Application of Adlerian Theory to the Workplace

While Adlerian theory has been applied to both the workplace and parenting, the linkage between the two has not been investigated. Therefore, the first goal of this study was to find if the way someone was raised has an influence on the values they have as an adult. Then, the second goal was to determine whether the individuals’ values influence the style they prefer in a leader. The last goal was to see if congruence between individuals’ preferred leadership style and the perceived leadership style of their current supervisor results in higher job satisfaction. This study found that the participants’ personal values were predicted by their parents’ values while they were growing up. Their preferred leadership style was predicted by their personal values, but not their parents’ values. Lastly, the participants indicated having higher supervisor and overall satisfaction the more similar their current supervisor’s leadership style was to their preferred leadership style

Comparison of Walleye: Stizostedion Vitreum Vitreum (Mitchell), Ecology and Biology From Three Discrete Areas of Lake Sakakawea, North Dakota

Various aspects of the ecology and biology of the walleye were examined from three discrete areas of Lake Sakakawea during the summer of 1982. Spatial distribution, predator-prey relationships and species association data were procured by simultaneously placing experimental and 0.5 in mesh gill nets at three depth ranges: 0-10 ft, 11-20 ft and 21-40 ft. Temporal distribution data were collected by lifting and resetting the gill nets approximately every six hours. Four time periods were used: 0600-1200 h, 1200-1800 h, 1800-2400 h and 2400-0600 h. Walleye age, growth and food habit data were also collected from the fish caught. The Van Hook Area produced the largest numbers of walleye and rainbow smelt, 03merus mordax (Mitchill). The 0-10 ft range produced the largest catches of walleyes for all areas. The total rainbow smelt catch was the largest in the 21-40 ft range. The Williston Area had the largest rainbow smelt catch in the 0-10 ft range. The total catch of walleye and rainbow smelt was significantly correlated for the 12 sampling periods. Walleyes and rainbow smelt numbers were also significantly correlated in the 11-20 ft range. More saugers, otizostedion canadense (Smith), were caught in the Wiiliston Area than walleyes. The differences in the total walleye and rainbow smelt catch among time periods were s/nall. The 2400-0600 h period produced the largest number of walleyes of the four time periods, while the 1800-2400 h period was the most productive for rainbow smelt. The largest catches of walleye and rainbow smelt came during the 1200-1800 h period in the Williston Area. There was a positive relationship between walleye and rainbow smelt during the 1800-2*100 h and 0600-1200 h periods. Ten age classes were found for the total walleye catch. Age classes III and VII were the largest for the total walleye catch. There were few age I and II walleye caught. The weight-length relationship for all of the walleye was explained by the equation: log W = - 5.793 +■ 3.299 log L. The mean coefficient of condition for the total walleye catch was 1.0*4. The walleyes caught in the Van Hook Area had significantly higher condition factors than did the other two areas. Rainbow smelt was the only forage species that was identified in the walleye stomachs. The stomachs of walleyes caught in the 11-20 ft range contained the greatest number and volume of rainbow smelt per stomach. Area morphometry, water temperature, light penetration and prey density are factors which may explain the larger numbers and faster growth rates of walleye caught in the Van Hook Area. The large catch of walleyes in the 0-10 ft range appear to be related to water temperature. Year class strength of walleyes is apparently closely related to water levels during spawning. Walleyes probably feed heavily on rainbow smelt because they are abundant, soft-rayed and easily caught

On the physical association of the peculiar emission: Line stars HD 122669 and HD 122691

Spectroscopic and photometric observations indicate a physical association between the peculiar early-type emission-line stars HD 122669 and HD 122691. The latter has undergone a drastic change in the strength of its emission lines during the past twenty years. There is some indication that both stars vary with shorter time scales

Comparison of Walleye: Stizostedion Vitreum Vitreum (Mitchell), Ecology and Biology From Three Discrete Areas of Lake Sakakawea, North Dakota

Various aspects of the ecology and biology of the walleye were examined from three discrete areas of Lake Sakakawea during the summer of 1982. Spatial distribution, predator-prey relationships and species association data were procured by simultaneously placing experimental and 0.5 in mesh gill nets at three depth ranges: 0-10 ft, 11-20 ft and 21-40 ft. Temporal distribution data were collected by lifting and resetting the gill nets approximately every six hours. Four time periods were used: 0600-1200 h, 1200-1800 h, 1800-2400 h and 2400-0600 h. Walleye age, growth and food habit data were also collected from the fish caught. The Van Hook Area produced the largest numbers of walleye and rainbow smelt, 03merus mordax (Mitchill). The 0-10 ft range produced the largest catches of walleyes for all areas. The total rainbow smelt catch was the largest in the 21-40 ft range. The Williston Area had the largest rainbow smelt catch in the 0-10 ft range. The total catch of walleye and rainbow smelt was significantly correlated for the 12 sampling periods. Walleyes and rainbow smelt numbers were also significantly correlated in the 11-20 ft range. More saugers, otizostedion canadense (Smith), were caught in the Wiiliston Area than walleyes. The differences in the total walleye and rainbow smelt catch among time periods were s/nall. The 2400-0600 h period produced the largest number of walleyes of the four time periods, while the 1800-2400 h period was the most productive for rainbow smelt. The largest catches of walleye and rainbow smelt came during the 1200-1800 h period in the Williston Area. There was a positive relationship between walleye and rainbow smelt during the 1800-2*100 h and 0600-1200 h periods. Ten age classes were found for the total walleye catch. Age classes III and VII were the largest for the total walleye catch. There were few age I and II walleye caught. The weight-length relationship for all of the walleye was explained by the equation: log W = - 5.793 +■ 3.299 log L. The mean coefficient of condition for the total walleye catch was 1.0*4. The walleyes caught in the Van Hook Area had significantly higher condition factors than did the other two areas. Rainbow smelt was the only forage species that was identified in the walleye stomachs. The stomachs of walleyes caught in the 11-20 ft range contained the greatest number and volume of rainbow smelt per stomach. Area morphometry, water temperature, light penetration and prey density are factors which may explain the larger numbers and faster growth rates of walleye caught in the Van Hook Area. The large catch of walleyes in the 0-10 ft range appear to be related to water temperature. Year class strength of walleyes is apparently closely related to water levels during spawning. Walleyes probably feed heavily on rainbow smelt because they are abundant, soft-rayed and easily caught