Iowa Agriculturist 68.03

Life Insurance and You 4 Skiing ... a day\u27s adventure 7 ISU Grads Tell What It IS Like in the Agri-business World 8 Agriculture in Greece 12 Plant Hunting - Behind the Iron Curtain 14 Creativity is the Word 15 Air Pollution 16 Campus Showcase 18 Winter Cotillion 21 Coeds Challenge Tradition 24 ISU Beef Herd Sets Pace 25 Campus March of Agriculture 26 Classroom and Campus 28 Strictly Bull 29 Dates for Penny Pinchers 30https://lib.dr.iastate.edu/iowaagriculturist/1047/thumbnail.jp

Iowa Agriculturist 69.01

The Governor Speaks Out On Iowa\u27s Brain Drain 2 Veishea 6 Students\u27 Prof of the Year 7 The Club Wants Recognition 8 Meatless Meats - Diet of the Future? 10 The Graduated or I feel the Draft 12 All-Ag Banquet 14 Water Conservation - Vital to All 16 The Story of Barbed Wire 18 All-out Chemical Warfare 21 A Day at the Ledges 22 Animal Farm 24 What Should He Be Like? 26 Campus March of Agriculture 28 Classroom and Campus 30 Strictly Bull 31https://lib.dr.iastate.edu/iowaagriculturist/1045/thumbnail.jp

The Formation of a "Primary Film" on Materials Submerged in the Sea at Port Hueneme, California

The initial stages of fouling, the accumulation of microscopic organisms, and formation of a primary film or slime layer, have received but sparse attention in the literature. To cite an example, the U.S. Naval Institute publication Marine Fording and Its Prevention contains hundreds of references to fouling but only eight pertain to the primary film

The Repression-Sensitization Dimension and Leisure Preferences

The Purpose of this study was to investigate the relationship of the repression-sensitization dimension and leisure preferences, specifically threatening versus nonthreatening physical activity and television program preferences. The hypotheses were that sensitizers would prefer threatening (violent) television programs and threatening (competitive) physical activities to a significantly greater degree than repressors. Sixty college undergraduates were designated repressors, sensitizers, or middle group by their scores on Byrne's Repression-Sensitization Scale. Preference sheets determined subjects' preferences for threatening and nonthreatening television programs and physical activities. Simple analyses of variance revealed no significant differences in repressors', sensitizers', or middle group's preferences for threatening television programs or physical activities, and thus the hypotheses were rejected. Non-significant tendencies in the data, in hypothesized directions, suggest further research

More Is (Not Always) Better: A Multi-Year Analysis of Advertising Effects on Ad Recall

Using data from 46 businesses and over 21,000 ads, this study provides an analysis of the relationship between advertising spend, engagement and ad recall on Facebook. An initial analysis reveals that advertising spend, and post comments are positively associated with ad recall, while frequency is negatively associated. A second analysis, segmented the data by the advertiser objective of brand awareness, video views or post engagement and reveals additional insight into the relationships between the variables. It is concluded that Facebook offers an effective channel to drive recall, but that advertisers should be careful to avoid ad fatigue. In total, the results provide evidence that Facebook advertising can easily become intrusive, and that brand awareness driven advertising exhibit the most promising relationship with ad recall

Identifying Barriers to Forage Innovation: Native Grasses and Producer Knowledge

Adoption of native warm-season grasses (NWSGs) in the tall fescue belt is limited despite studies documenting the potential contribution of these forages to profitable beef production. On the basis of two surveys conducted in Tennessee, a survey of beef producers and a survey of agricultural professionals, we evaluated perceptions of NWSG forages and how those perceptions could influence their adoption. Although agricultural professionals were more familiar with NWSGs than producers, both populations had limited knowledge regarding these forages, indicating that additional Extension education is needed. Our results provide useful guidance for developing NWSG forage educational programs for producers and agricultural professionals

Electrodeposition of zinc-manganese alloy coatings from ionic liquid electrolytes

Electrodeposited zinc-manganese alloys have been found to have potentially attractive corrosion resisting characteristics for ferrous substrates. However, researchers have found their formation problematic from aqueous electrolytes, due particularly to the reactive nature of manganese and its low reduction potentials. The present investigations examine the possibility of electrodepositing this alloy utilising an ionic liquid electrolyte. In this manner electrolytes based upon manganese and zinc chlorides and boric acid were made by dissolution in a 2:1 molar ratio urea: choline chloride solvent. Physical measurements of electrolyte characteristics as well as pertinent electrochemical information on alloy electrodeposition were obtained to examine the efficacy of this metal/electrolyte combination

The environment power system analysis tool development program

The Environment Power System Analysis Tool (EPSAT) is being developed to provide space power system design engineers with an analysis tool for determining system performance of power systems in both naturally occurring and self-induced environments. The program is producing an easy to use computer aided engineering (CAE) tool general enough to provide a vehicle for technology transfer from space scientists and engineers to power system design engineers. The results of the project after two years of a three year development program are given. The EPSAT approach separates the CAE tool into three distinct functional units: a modern user interface to present information, a data dictionary interpreter to coordinate analysis; and a data base for storing system designs and results of analysis

ARES I Aerodynamic Testing at the NASA Langley Unitary Plan Wind Tunnel

Small-scale force and moment and pressure models based on the outer mold lines of the Ares I design analysis cycle crew launch vehicle were tested in the NASA Langley Research Center Unitary Plan Wind Tunnel from May 2006 to September 2009. The test objectives were to establish supersonic ascent aerodynamic databases and to obtain force and moment, surface pressure, and longitudinal line-load distributions for comparison to computational predictions. Test data were obtained at low through high supersonic Mach numbers for ranges of the Reynolds number, angle of attack, and roll angle. This paper focuses on (1) the sensitivity of the supersonic aerodynamic characteristics to selected protuberances, outer mold line changes, and wind tunnel boundary layer transition techniques, (2) comparisons of experimental data to computational predictions, and (3) data reproducibility. The experimental data obtained in the Unitary Plan Wind Tunnel captured the effects of evolutionary changes to the Ares I crew launch vehicle, exhibited good agreement with predictions, and displayed satisfactory within-test and tunnel-to-tunnel data reproducibility

Effect of heat treatment on zinc whisker growth from electrodeposited coatings

The effects of simple heat treatments on electrodeposited zinc coatings formed on mild steel substrates were examined. It was found that over a temperature range of 50-200°C for 1 and 24 h periods zinc whisker growth was evident. The additional effects of electrodeposited coating thickness and subsequent chromium-based passivation processes were also examined in terms of their effect on whisker growth. Individual whisker morphologies were investigated utilising a field emission gun scanning electron microscopy (FEGSEM) and focused ion beam field emission gun scanning electron microscopy (FIB-FEGSEM)