ANNUAL REPORT OF THE SOUTHWESTERN MINNESOTA FARM MANAGEMENT SERVICE 1950

Farm Management,

Split Labor Markets in International Schools: Perceptions of Fairness Among Local-Hire Teachers

This quantitative study investigated perceptions of compensation fairness among local-hire teachers at international schools who worked in a split labor market. Under this model, localhire teachers perform the same basic job duties as their foreign-hire colleagues, yet receive far less compensation. The study employed survey research to examine potential relationships between such variables as: perceived compensation differentials, perception of foreign-hire contributions, teachers’ dependents attending the school on scholarship, perception of systems of communication and promotion, perception of compensation fairness, and willingness to support and collaborate with foreign hire teachers. 86 local-hire teachers from 7 international schools responded to online questions at a response rate of 61.4%. The data-collection instrument was modified from a similar study conducted by Bonache, Sanchez, and Zárraga-Oberty (2009) in a multi-national business setting. Analysis revealed local-hire teachers’ perceptions of compensation fairness to be significantly correlated (p \u3c 0.05) to two variables: (a) the perceived professional contributions of foreign-hire teachers at the same school (r = .358), and (b) localhire teachers’ perceived difference between personal compensation and compensation of localhire teachers at other international schools (r = -.363). These same two variables also significantly contributed to the multiple regression model created by this study to predict localhire teachers’ perceptions of compensation fairness (R = .620, R2 = .385). All results were analyzed in the context of Social Equity and Referent Selection Theory, meaning perceptions of compensation fairness may change based upon the local-hire teachers’ choice of a social referent. Four additional independent variables were rejected as insignificant to the model. Unlike similar studies conducted in the business sector, no evidence was found to support the hypothesis that there was a positive correlation between local-hire teachers’ perceived compensation fairness and their willingness to assist and collaborate with foreign-hire teachers. These findings shed light on a minimally studied issue related to social justice in international schools. The author recommends international school administrators be aware of the local job market for local-hire teachers, monitor the contributions of foreign-hire teachers, and increase efforts at communication with local-hire teachers

Modelling of long waves generated by bottom-tilting wave maker

In order to generate very long waves in laboratory, a bottom-tilting wave maker is designed and used at the University of Dundee. This new type of wave maker canproduce waves longer than solitary wavesin terms of the effective wavelength, which provides better long wave model. Nonlinear and dispersive numerical models are builtfor modelling the wave tank. A shock-capturing finite volume scheme with high-order reconstruction method is used to solve the governing equations. By comparing to theexperimental measurements, the numerical models are verified and able to approximate the resulting waves in the wave tank

Peaked sloshing in a wedge container

Finite-amplitude free-surface flow in a wedge container is investigated analytically. We study a motionless standing wave of pure potential-flow acceleration with maximal amplitude where its right-angle surface peak falls from rest. The nonlinear free-surface conditions are satisfied by a family of flows where the chosen initial acceleration field is governed by one single dipole plus its three image dipoles. Streamlines and isobars are plotted, with the free surface as the zero-pressure isobar. The key geometric parameters are tabulated for each case, supplied with force calculations for an upright wedge container. The present approach is assessed against established eigenfunctions for linearized standing waves in a wedge container. The present dipole flows constitute a much richer family of peaked free sloshing shapes than the classical Fourier modes of free oscillation.acceptedVersio

Prøveboring i norsk petroleumsjournalistikk : en analyse av norske mediers petroleumsdekning og petrolseumsselskapenes medierelasjoner

Denne oppgaven er en analyse av norske mediers petroleumsdekning og petroleumsselskapenes medierelasjoner. Seks aviser og to fjernsynskanalers petroleumsdekning analyseres kvantitativt med fokus på omfang og hvilke problemstillinger som vektlegges og prioriteres. Relasjonene mellom petroleumsselskapene og journalister analyseres med utgangspunkt i begrepet symmetri slik det fremstår i James Grunigs modeller for informasjon og samfunnskontakt og fire former for journalist-/kilderelasjoner, kalt forhandlingsrelasjoner, uegennyttige relasjoner, rettighetsrelasjoner og kommersielle markedsrelasjoner. Statoil, Hydro, Shell og Oljeindustriens Landsforening representerer i denne sammenheng petroleumsnæringen. Analysen avdekker store variasjoner i petroleumsdekningen fra medium til medium, hva angår både omfang og prioriteringer. Relasjonsanalysen konkluderer med at forhandlingsrelasjoner er den dominerende relasjonsformen mellom petroleumsselskapene og mediene, og at aktørene i stor grad handler strategisk for å fremme sine interesser. Kommunikasjonen er fra selskapenes side i utgangspunktet symmetrisk, men selskapene kommuniserer tidvis også asymmetrisk. Nære og gode relasjoner til journalister og medier er dermed både et mål og et middel

On the interaction of vortices with mixing layers

We describe the perturbations introduced by two counter-rotating vortices - in a two-dimensional configuration - or by a vortex ring - in an axisymmetric configuration - to the mixing layer between two counterflowing gaseous fuel and air streams of the same density. The analysis is confined to the near stagnation point region, where the strain rate of the unperturbed velocity field, A0, is uniform. We restrict our attention to cases where the typical distance 2r0 between the vortices - or the characteristic vortex ring radius r0 - is large compared to both the thickness, δv, of the vorticity core and the thickness, δm∼(ν/A0)1/2, of the mixing layer. In addition, we consider that the ratio, Γ/ν, of the vortex circulation, Γ, to the kinematic viscosity, ν, is large compared to unity. Then, during the interaction time, A0,-1, the viscous and diffusion effects are confined to the thin vorticity core and the thin mixing layer, which, when seen with the scale r0, appears as a passive interface between the two counterflowing streams when they have the same density. In this case, the analysis provides a simple procedure to describe the displacement and distortion of the interface, as well as the time evolution of the strain rate imposed on the mixing layer, which are needed to calculate the inner structure of the reacting mixing layer as well as the conditions for diffusion flame extinction and edge-flame propagation along the mixing layer. Although in the reacting case variable density effects due to heat release play an important role inside the mixing layer, in this paper the analysis of the inner structure is carried out using the constant density model, which provides good qualitative understanding of the mixing layer response