467 research outputs found
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Making the business case? Intercultural differences in framing economic rationality related to environmental issues
Purpose: The purpose of this paper is to challenge the assumptions prominent in the Anglo-American context that the objective of a business is to increase its profits or/and that managers have to make 'the business case' in order to implement environmentally sounder solutions or other sustainability considerations into their business decisions. The paper argues that these assumptions are not presented as a human construction or agreement, instead they are treated as though they are a given, a prerequisite to a business system. By comparing qualitative statements in a cross-cultural study the paper highlights different ways in which economic rationality could be conceptualised
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A new framework for embedding sustainability into the business school curriculum
Tests on a model of the D.F.W. airplane T-29 of the "Deutsche Flugzeug derke" (German airplane works)
Experiments similar to those carried out with the A.E.G (Allgemeine Elektrizitats-Gesellschaft) were made in the small wind tunnel of the Gottingen laboratory on a model of the D.F.W. airplane T-29. Three series of tests were carried out on the model with a velocity head (or dynamic pressure) of 5 kg/sq m (1.02 lb/sq ft), during which one of the movable surfaces was deflected at various angles, while both the others were retained in their central positions. Of special interest among the results of the tests is the different run of the elevating moments. The curves for the A.E.G. model, rising to the right, denote stability with the elevator locked, while the slight inclination to the left with the D.F.W model denotes a slight instability. For the maximum C(sub L) values, the stability of A.E.G. model continues to increase and the instability of the D.F.W. model is converted into stability. The rolling moments shown when the angular deflection of the ailerons is 0 degrees are due, in both series of tests, to the unequal distribution of the air velocity over the cross section of the wind tunnel, rather than to a lack of symmetry in the model
Tests on an airplane model, AEG D I of the Allgemeine Elektricitats Gesellschft, A-G, airplane construction section conducted at the Gottingen Model Testing Laboratory for Aerodynamics
Tests were carried out in the small wind tunnel of the Gottingen establishment on a complete model of the AEG D I airplane. The agreement between the model and the complete airplane applies particularly to the wings, which have ribs cut out of sheet metal and built up in exactly the same manner as in the actual airplane. Various series of tests were carried out with this model in which one or the other of the control surfaces were adjusted to various angles, while the others remained in their neutral positions. During the first three series of tests, the stabilizer was set at a positive angle of 3 degrees, 45' relative to the axis of the engine crankshaft, after which further tests at a 6 degree 30' we made. Finally, the model was tested with the tail group removed. With the elevators set in the prescribed positions, the lift, the drag, and the moments about an axis passing through the center of gravity and perpendicular to the plane of symmetry were measured. All three sets of readings are given as absolute coefficients. Where one of the other control surfaces was deflected from its normal position, the moment produced by that adjustment of the surface was also measured
Identification of the Kna/Knb polymorphism and a method for Knops genotyping
BACKGROUND: DNA mutations resulting in the McCoy and Swain-Langley polymorphisms have been identified on complement receptor 1 (CR1)—a ligand for rosetting of Plasmodium falciparum-infected RBCs. The molecular identification of the Kn(a)/Kn(b) polymorphism was sought to develop a genotyping method for use in the study of the Knops blood group and malaria. STUDY DESIGN AND METHODS: CR1 deletion constructs were used in inhibition studies of anti-Kn(a). PCR amplification of Exon 29 was followed by DNA sequencing. A PCR-RFLP was developed with NdeI, BsmI, and MfeI for the detection of Kn(a)/Kn(b), McC(a)/McC(b), and Sl1/Sl2, respectively. Knops phenotypes were determined with standard serologic techniques. RESULTS: A total of 310 Malian persons were phenotyped for Kn(a) with 200 (64%) Kn(a+) and 110 (36%) Kn(a−). Many of the Kn(a−) exhibited the Knops-null phenotype, that is, Helgeson. The Kn(a/b) DNA polymorphism was identified as a V1561M mutation with allele frequencies of Kn(a) (V1561) 0.9 and Kn(b) (M1561) 0.1. CONCLUSION: The high frequency (18%) of Kn(b) in West African persons suggests that it is not solely a Caucasian trait. Furthermore, because of the high incidence of heterozygosity as well as amorphs, accurate Knops typing of donors of African descent is best accomplished by a combination of molecular and serologic techniques
Comparing Aircraft Observations of Snowfall to Forecasts Using Single or Two Moment Bulk Water Microphysics Schemes
High resolution weather forecast models with explicit prediction of hydrometeor type, size distribution, and fall speed may be useful in the development of precipitation retrievals, by providing representative characteristics of frozen hydrometeors. Several single or double-moment microphysics schemes are currently available within the Weather Research and Forecasting (WRF) model, allowing for the prediction of up to three ice species. Each scheme incorporates different assumptions regarding the characteristics of their ice classes, particularly in terms of size distribution, density, and fall speed. In addition to the prediction of hydrometeor content, these schemes must accurately represent the vertical profile of water vapor to account for possible attenuation, along with the size distribution, density, and shape characteristics of ice crystals that are relevant to microwave scattering. An evaluation of a particular scheme requires the availability of field campaign measurements. The Canadian CloudSat/CALIPSO Validation Project (C3VP) obtained measurements of ice crystal shapes, size distributions, fall speeds, and precipitation during several intensive observation periods. In this study, C3VP observations obtained during the 22 January 2007 synoptic-scale snowfall event are compared against WRF model output, based upon forecasts using four single-moment and two double-moment schemes available as of version 3.1. Schemes are compared against aircraft observations by examining differences in size distribution, density, and content. In addition to direct measurements from aircraft probes, simulated precipitation can also be converted to equivalent, remotely sensed characteristics through the use of the NASA Goddard Satellite Data Simulator Unit. Outputs from high resolution forecasts are compared against radar and satellite observations emphasizing differences in assumed crystal shape and size distribution characteristics
Evaluating the Performance of Single and Double Moment Microphysics Schemes During a Synoptic-Scale Snowfall Event
Increases in computing resources have allowed for the utilization of high-resolution weather forecast models capable of resolving cloud microphysical and precipitation processes among varying numbers of hydrometeor categories. Several microphysics schemes are currently available within the Weather Research and Forecasting (WRF) model, ranging from single-moment predictions of precipitation content to double-moment predictions that include a prediction of particle number concentrations. Each scheme incorporates several assumptions related to the size distribution, shape, and fall speed relationships of ice crystals in order to simulate cold-cloud processes and resulting precipitation. Field campaign data offer a means of evaluating the assumptions present within each scheme. The Canadian CloudSat/CALIPSO Validation Project (C3VP) represented collaboration among the CloudSat, CALIPSO, and NASA Global Precipitation Measurement mission communities, to observe cold season precipitation processes relevant to forecast model evaluation and the eventual development of satellite retrievals of cloud properties and precipitation rates. During the C3VP campaign, widespread snowfall occurred on 22 January 2007, sampled by aircraft and surface instrumentation that provided particle size distributions, ice water content, and fall speed estimations along with traditional surface measurements of temperature and precipitation. In this study, four single-moment and two double-moment microphysics schemes were utilized to generate hypothetical WRF forecasts of the event, with C3VP data used in evaluation of their varying assumptions. Schemes that incorporate flexibility in size distribution parameters and density assumptions are shown to be preferable to fixed constants, and that a double-moment representation of the snow category may be beneficial when representing the effects of aggregation. These results may guide forecast centers in optimal configurations of their forecast models for winter weather and identify best practices present within these various schemes
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Managerial orientations towards environmental issues: a comparative study of British and German managers
In spite of growing interest in environmental and especially sustainability oriented business literature, little attention has been given to one major actor in this context: the manager. How do managers make sense of environmental issues and deal with them? Even less research has been undertaken to explore cultural variations in managerial orientation to environmental issues. These research questions are addressed through a comparative cross-cultural study with British and German managers in the Food Retail and Energy Sector using a social constructionist approach with a focus on how “environmental knowledge, risks and problems are socially assembled” (Hannigan 1995:31). In this study the differences between the two countries in how managers present the ‘ecological element’ of their identities and how they talk about environmental issues in business are pronounced. While the German managers claim that a sound knowledge in environmental issues is part of being a good manager, British managers stress that they only attend to environmental issues if it is in the interest of their company and its financial objectives. In line with their attachment to a notion of moral neutrality, British managers argue that the business system require them to make the ‘business case’ in assessing whether to include environmental improvements or not. They refer to the existing business system as an ‘objective reality’. This perception of a social system as objective was questioned by Habermas (1984). Applying Habermas’ distinction of ‘instrumental and communicative reason’, it is apparent that German managers employ a different ‘instrumental reason’ to that applied by British managers. In addition to the cost-saving potential of environmental efficiency the German managers favour investing in environmental improvements as long as the survival of the company is not at risk. Furthermore, they constantly intertwine ‘instrumental and communicative reason’ by dwelling on environmental considerations as reasons for their business decisions. It is also presented as socially acceptable by German managers to discuss private views and philosophical insights in business and to raise business related issues in private meetings. The British managers present themselves as distinguishing between and separating the private world from the business world. Differing concepts of ‘economic rationality’ are also applied by the two groups in how they identify and evaluate the relative importance of stakeholders. British managers give priority to shareholders and argue that they do not want to impose their values on customers. In contrast, German managers seldom mention shareholders. Instead they talk for example about the challenges posed by customers who leave packaging at the till. The pronounced differences in the two countries are further highlighted in how managers refer to cultural institutions and influences they perceive to be responsible for their environmental awareness and sensemaking. The study argues that an environmental education in school and exposure to a broad range of subjects beyond the age of sixteen has an impact on how managers draw later in life on different subjects in dealing with business decisions. The insights offered by this study make it possible to propose suggestions on how the teaching of sustainability could be improved
The NASA Short-Term Prediction Research and Transition (SPoRT) Center: Opportunities for Collaboration in the Great Lakes Region
The presentation slides include: The SPoRT Center, History and Future of SPoRT, Great Lakes Applications, Great Lakes Forecasting Issues, Applications to the WRF-EMS, Precipitation Science, Lake Effect Precipitation, Sensitivity to Microphysics, Exploring New Schemes, Opportunities for Collaboration, and SPoRT Research and Development
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