LP-Gas for Tractors

There\u27s been a lot of discussion on the use of LP-Gas (bottled gas) for farm tractors. A few farmers are using it. This article reports the results of some research on its use made of Iowa State College

Attrition in the Mandated Treatment of Men Who Batter: A Look at Demographic Influence

Descriptive variables associated with men completing domestic abuse treatment programs were found to be influencing factors in earlier attrition research. One hundred clients who attended a Minneapolis-based domestic abuse treatment program were selected for inclusion in this study. Six demographic variables were thought to be predictive of treatment completion or drop out. The literature review suggested that factors positively related to attrition included being under less strain. With this in mind, the revised Strain Theory (Agnew, 1992) was used as the theoretical framework for this study. Strain Theory focuses on negative relationships with others, negative affective states and pressure toward delinquency when the negative relationship engenders the negative affect. Marital status was the only variable that provided statistical significance. Age, previous attendance in a domestic abuse treatment program, race, employment status and target of violence were not determined to be statistically significant. The purpose of this study was to suggest possible risk markers for domestic abuse treatment programs for men as they first enter treatment, to better address the attrition problem

How Much for Custom Work in 1953?

Successful use of farm equipment on more than one farm depends upon custom rates fair to both parties. The following information may help you in figuring custom work costs during 1953

Vertical Acoustic Propagation in the Non-Homogeneous Layered Atmosphere for a Time-Harmonic, Compact Source

In this work we study vertical, acoustic propagation in a non-homogeneous media for a spatially-compact, time-harmonic source. An analytical, 2-layer model is developed representing the acoustic pressure disturbance propagating in the atmosphere. The validity of the model spans the distance from the Earth\u27s surface to 30,000 meters. This includes the troposphere (adiabatic), ozone layer (isothermal), and part of the stratosphere (isothermal). The results of the model derivation in the adiabatic region yield pressure solutions as Bessel functions of the First (J) and Second (Y) Kind of order $-\frac{7}{2}$ with an argument of $2 \Omega \tau$ (where $\Omega$ represents a dimensionless frequency and $\tau$ is a dimensionless vertical height in z (vertical coordinate)). For an added second layer (isothermal region), the pressure solution is a decaying sinusoidal, exponential function above the first layer. In particular, the vertical, acoustic propagation is examined for various configurations. These are divided into 2 basic classes. The first class consists of examining the pressure response function when the source is located on boundary interfaces, while the second class consists of situations where the source is arbitrarily located within a finite layer. In all instances, a time-harmonic, compact source is implicitly understood. However, each class requires a different method of solution. The first class conforms to a general boundary value problem, while the second requires the use of Green\u27s functions method. In investigating problems of the first class, 3 different scenarios are examined. In the first case, we apply our model to a semi-infinite medium with a time-harmonic source ($e^{-i \omega t}$) located on the ground. In the next 2 cases, a semi-infinite medium is overlain on the previous medium at a height of z=13,000 meters. Thus, there exist two boundaries: the ground and the layer interface between the 2 media. Sources placed at these interfaces represent the 2nd and 3rd scenarios, respectively. The solutions to all 3 cases are of the form $A \frac{J_{-\frac{7}{2}}(2 \Omega \tau)}{{\tau}^{-\frac{7}{2}}} + B \frac{Y_{-\frac{7}{2}}(2 \Omega \tau)}{{\tau}^{-\frac{7}{2}}}$, where \textit{A} and \textit{B} are constants determined by the boundary conditions. For the 2nd class, we examine the application to a time-harmonic, compact source placed arbitrarily within the 1st layer. The method of Green\u27s functions is used to obtain a particular solution for the model equations. This result is compared with a Fast Field Program (FFP) which was developed to test these solutions. The results show that the response given by the Green\u27s function compares favorably with that of the FFP. Keywords: Linear Acoustics, Inhomogeneous Medium, Layered Atmosphere, Boundary Value Problem, Green\u27s Function Metho

Telerobotics in the deep ocean

This paper presents experimental results of the control system for the JASON ROV that has been designed for precision survey and other automated applications. The JASON control system emphasizes a form of supervisory control where the human pilot and the automatic system share the control tasks. Results presented include hovering, automatic track following, and several interactive modes

Participate or Else!: The Effect of Participation in Decision-Making in Meetings on Employee Engagement

In the scope of organizational life, few events are as universal or as influential as workplace meetings. In this study, we focused our attention on better understanding the relationship between meetings processes and post-meeting outcomes. More specifically, we investigated the relationship between participation in decision-making in meetings (PDM) and employee engagement, after controlling for the impact of meeting size and other demographic variables. We examined this from a theoretical perspective, providing particular consideration to the underlying basis of social exchange theory and norms of reciprocity at work in this relationship. Using a sample of working adults in the United States who were employees of organizations and attend meetings regularly, we found that PDM in meetings is related to employee engagement, even after controlling for job level, meeting size, tenure, and age. Additionally, perceived supervisor support moderates the relationship between PDM in meetings and employee engagement, such that the positive relationship is stronger when perceived supervisor support is high. Furthermore, meeting load also moderates the relationship between PDM in meetings and employee engagement, such that the positive relationship is stronger when meeting load is high. This study is unique in its examination of how characteristics of the meeting setting may influence post-meeting outcomes such as employee engagement. Taken together, the findings suggest that PDM is associated with employee engagement, under certain conditions that are discussed

The Impact of Premeeting Talk on Group Performance

Interactions that occur prior to a meeting constitute premeeting talk (PMT). Of the different PMT types, research suggests that small talk PMT is especially meaningful. In this study, meeting participants’ interactions both prior to and during the meeting were video recorded, coded into sense units, and classified by coding schemes. This study investigated the influence of small talk PMT on both perceived and objective group performances, as well as the potential for positive socioemotional and problem-focused statements to serve as mediators. The results supported the mediating influence of both types of statements for only perceived performance. Our results suggest that a group-level babble effect can take place in meetings, such that groups who engage in more extensive discussion tend to believe that they achieved high performance, but objective ratings do not support this belief. Theoretical and practical implications, limitations of the study, and future research opportunities are discussed

A novel trigger-based method for hydrothermal vents prospecting using an autonomous underwater robot

Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Autonomous Robots 29 (2010): 67-83, doi:10.1007/s10514-010-9187-y.In this paper we address the problem of localizing active hydrothermal vents on the seafloor using an Autonomous Underwater Vehicle (AUV). The plumes emitted by hydrothermal vents are the result of thermal and chemical inputs from submarine hot spring systems into the overlying ocean. The Woods Hole Oceanographic Institution's Autonomous Benthic Explorer (ABE) AUV has successfully localized previously undiscovered hydrothermal vent fields in several recent vent prospecting expeditions. These expeditions utilized the AUV for a three-stage, nested survey strategy approach (German et al., 2008). Each stage consists of a survey flown at successively deeper depths through easier to detect but spatially more constrained vent fluids. Ideally this sequence of surveys culminates in photographic evidence of the vent fields themselves. In this work we introduce a new adaptive strategy for an AUV's movement during the first, highest-altitude survey: the AUV initially moves along pre-designed tracklines but certain conditions can trigger an adaptive movement that is likely to acquire additional high value data for vent localization. The trigger threshold is changed during the mission, adapting the method to the different survey profiles the robot may find. The proposed algorithm is vetted on data from previous ABE missions and measures of efficiency presented

Leadership in Workplace Meetings: The Intersection of Leadership Styles and Follower Gender

Meetings are ubiquitous across organizations, yet researchers have paid scant attention to the role of meeting leaders in affecting meeting outcomes. Because meetings are important discursive sites, the style of a meeting leader may influence subordinate views of the meeting and leader. Using a sample of working adults, we first demonstrated that meeting attendees who perceived their leader as participative viewed the leader as more warm and competent than meeting attendees who had a directive leader. We explain this finding through the framework of social exchange theory. In Study 2, we conducted an experiment to further probe the relation between meeting leader style and subordinate perceptions of the leader. Again, participants viewed participative leaders as more warm and competent than directive leaders. Interestingly, working adults preferred participative leaders over directive leaders across every type of work meeting. We further found that participant gender interacted with leader style, such that men rated directive leaders are warmer than did women, but men and women did not differ in their assessments of participative leaders