Hypercube orientations with only two in-degrees

We consider the problem of orienting the edges of the $n$-dimensional hypercube so only two different in-degrees $a$ and $b$ occur. We show that this can be done, for two specified in-degrees, if and only if an obvious necessary condition holds. Namely, there exist non-negative integers $s$ and $t$ so that $s+t=2^n$ and $as+bt=n2^{n-1}$. This is connected to a question arising from constructing a strategy for a "hat puzzle."Comment: 9 pages, 4 figure

Some guidance concerns in vocational agriculture

The first of the three objectives was achieved by compiling data concerning vocational agriculture graduates from 101 high schools in Tennessee. The data reveal the actual percentage of boys who, Upon completing four years of vocational agriculture, entered upon the work of a farm or that of the home farm, entered agricultural-related occupations, and entered nonagricultural-related occupations. The data presented are compiled from questionnaires answered by thirty-four vocational agriculture teachers in East Tennessee, thirty-eight teachers in Middle Tennessee and twenty-nine teachers in West Tennessee. The presentation of this material is to inform the reader of things which are actually happening to high-school vocational agriculture students who have completed four years of vocational agriculture upon graduation. A copy of the questionnaire used to obtain the desired information for this phase of the study may be found in Appendix A, and the data collected are presented in Chapter III. The second objective was concerned with the qualifications, training, and education desired by employers in agricultural-related occupations. These data were compiled from interviews with twenty-one employers in agricultural-related occupations in Knox, Blount and Sevier Counties. Before beginning an interview, the writer explained the nature and purpose of the study and assured the interviewee that the information given would be kept strictly confidential. A copy of the survey form was given to the interviewee to serve as a guide during the interview. As the questions were discussed, the answers given by the interviewee were recorded on another copy of the survey form by the interviewer. All data collected were recorded in the presence of the interviewee. Each interview required approximately thirty minutes to complete. A copy of the survey form may be found in Appendix C, and the data collected are presented in Chapter lV. The third objective was to determine the procedures which have been and are being followed by vocational agriculture teachers in accepting prospective enrollees into all-day classes when the prospective enrollees indicated their objectives were other than full-time farming. These data were likewise compiled from a questionnaire answered by the same vocational agriculture teachers as those who answered the questionnaire for the first objective. A copy of the questionnaire may be found in Appendix A, and the data collected are presented in Chapter V

Lactose fermenting bacteria in the water supplies of the Rolla Quadrangle

I. Preliminary investigations. This includes the securing of 139 water samples from water sources in the Rolla Quadrangle, and inoculating 1cc samples from these into Dunham\u27s Lactose tubes and thereby getting lactose gas production checks on the field samples. II. Confirmatory tests. This consisted in the isolation of lactose fermenters on Eosin-Methylene Blue Agar and checking of the cultures back through the lactose and then through dulcitel and saccharose so as to complete Jackson\u27s Classification. 106 cultures were classified in this manner. III. Running through a complete set of tests of pure cultures, so as to completely (as possible) identify them. 27 pure cultures were runthrough a complete set of tests. The function of this study and of the tests is to gain a definite knowledge of the potability of water supplies by bacteriological examination methods --Introduction: Scope of This Study, page 3

Teacher Attitude, Classroom Climate, And' the Level of Implementation of Recommended Middle School Practices in Oklahoma

The purpose of this investigation was to determine the current status of middle school education in Oklahoma. This study also examined factors regarding teacher attitudes and classroom climate in Oklahoma middle schools.Educational Administratio

The Torus Does Not Have a Hyperbolic Structure

Several basic topics from Algebraic Topology, including fundamental group and universal covering space are shown. The hyperbolic plane is defined, including its metric and show what the "straight" lines are in the plane and what the isometries are on the plane. A hyperbolic surface is defined, and shows that the two hole torus is a hyperbolic surface, the hyperbolic plane is a universal cover for any hyperbolic surface, and the quotient space of the universal cover of a surface to the group of automorphisms on the covering space is equivalent to the original surface

Missouri School of Mines, Civil Engineering Department survey data. Including the adjustment of the triangulation net on the M.S.M. Campus

In taking up the adjustment of survey data on the M.S.M. Campus the first thing to determine [is] the use for said data. The data is used by the Department to determine whether or not the student in his Field Work has pursued correct methods. No attempt is made to require great precision as the student is just learning to use the instruments and time is not allowed in the courses for him to learn other than the rudiments of Surveying --Part 2, Adjustment Data, Narration of Adjustment Methods, page 24

A scoping investigation of eye-tracking in Electronic Gambling Machine (EGM) play

The nature of the association between Electronic Gambling Machines (EGMs) and gambling problems remains uncertain. Eye-tracking offers a potentially powerful method to understand how individuals attend to the visual displays and features of machine games as a function of machine experience, use of other commercial gambling products, the degree to which some game features capture players attention and, critically, vulnerability to problematic patterns of machine play. Characterizing machine players' attention to machine games may aid the design of harm-minimization measures such as, but not limited to, pop-up messages and visible clocks; and provide an important ancillary measure for testing their efficacy. Here, we conducted the first study to use eye-tracking to improve our understanding of how machine players attend to EGM displays in local bookmaker offices (LBOs) situated across North West England, as well as North East and North Wales. Through liaison with 4 bookmaker operators, we recruited a sample of 118 LBO customers who, first, completed a small number of questionnaires about their gambling history and other gambling activities and, then, completed a typical machine gambling session with their own money while wearing eye-tracking glasses to capture eye-movement pattern. The protocol captured regions of gaze fixation while playing (B2) roulette or (B3) slots on B category machines (Gambling Commission, 2012). The final dataset consisted of 91 eye-tracking recordings: 59 games of roulette and 57 slots games. Our principle dependent measure was the percentage of fixations of visual features and machine display locations (as areas of interest; AOIs) as an objective indicator of overt visual attention and their importance to machine players. Our data analysis included statistical correction for differences in the relative size (display area) and display duration across AOIs. To summarise, our main findings are as follows: In roulette, 56.3% of LBO machine players fixations were distributed over the chip-placement area while placing bets (in the stationary states of the game), rising to 75.1% while the roulette wheel Eye-tracking & machines Rogers & Leek; main text v2; 24th March 2017 3 spun in the moving states of the games). Machine players looked at their credit balance 7.2% of the time while placing bets, only slightly more frequently than the previous winning number at 6.8%. In slots games, the slot-reels dominated machine players' visual attention: accounting for 53.6% of fixations while placing bets, rising to 91.7% while spinning. Players' fixations of their credit-balances amounted to 14% of the total while placing bets but only 5.1% while the slot-reels spun. Fixations away from the machine were more frequent while placing bets in both roulette and slots games: 13.5% and 13.4% respectively, dropping to 2.4% and 1.1% while the wheel/slot-reels spun. Players' age and years of education were only weakly related to fixation patterns while playing roulette or slots games. Unemployed players allocated fewer fixations over the chip-placement area (both while the roulette wheel was stationary and while it spun) and over the slot-reels while placing bets; they also tended to look away from the machine more while placing bets in roulette. Frequent machine players tended to look at the roulette wheel less frequently than infrequent users while playing roulette games; involvement in other forms of gambling tended to increase attention towards credit balance but was not otherwise linked to particular patterns of fixations. Finally, problems gamblers allocated fewer fixations to the roulette wheel while placing bets and while it spun compared to non-problem gamblers; and tended to look away from the machine more frequently; in slots games, problem gamblers looked more frequently at amount-won messages. These data describe, for the first time, the distributions of machine players overt attention while navigating roulette and slots games in a commercial settings. In general, fixation counts showed the least variability for moving visual features and events that are likely to capture attention automatically, such as spinning Eye-tracking & machines Rogers & Leek; main text v2; 24th March 2017 4 roulette wheels or spinning slot-reels. However, fixations were also concentrated upon visual features and elements with relatively less attentional capture such as the chip-placement-area while placing bets in roulette and looking at credit balances in both games. Associations between patterns of fixation and both frequency of past-month expenditure on B category machines and broader gambling involvement were modest, suggesting that most of the variability in eye-movements and fixations reflects players navigation through the sequenced behaviours of placing bets and monitoring spinning roulette wheels or slot-reels in anticipation of game outcomes. Players with extensive machine experience tended to discount slightly the roulette wheel as a visual feature; while players with broader patterns of gambling activity looked at credit balances frequently, suggesting that such individuals are mindful of available credits. Players with gambling problems allocated fewer fixations over the chip-placement-area while placing bets and while watching the wheel spun compared to non-problem gamblers, suggesting that placing of bets can be accomplished with less attentional focus. These individuals were also more likely to look away from the machine altogether, suggesting that, in roulette play, gambling problems might be associated with a loosened attentional focus to events elsewhere in the shop. However, in slots games, problems gamblers' attended to the reward signals of previous games (amount-won) when placing the next bets. So far as we are aware, these data are the first to show that eye-tracking methodology has some potential to offer insights into machine-player interactions, and to provide a bias-free measure of individual differences in attention to games visual features and events as a function of their experience with gambling machines, gambling background and vulnerability to gambling-related harms. This study offers a methodology for studying and optimizing the timing, placement and content of harm-minimization messaging