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Model Needs (model + need)
Selected AbstractsUpdate on desiccant wheel modelINTERNATIONAL JOURNAL OF ENERGY RESEARCH, Issue 12 2004M. Beccali Abstract This short communication presents the update on the desiccant wheel models, developed earlier by the present authors. It is to be mentioned here that the psycrometric model presented earlier (Int. J. Energy Res., 2003; 27:17) is valid only for the desiccant wheel running with identical volume air-flows in supply and regeneration sides. However, when system runs with volume air flow ratio between supply and regeneration side (,), different from 1 (one), the model need further modifications. In the present work, correction factors were developed and incorporated in order to update the earlier model for predicting correctly the temperature and humidity of processed air at the outlet of desiccant wheel. The modified model were verified against the experimental results corresponding to different values of ,, obtained from the industry for three different kinds of desiccant wheels. Copyright © 2004 John Wiley & Sons, Ltd. [source] The introduction of environmental requirements for trucks and construction vehicles used in road maintenance contracts in SwedenCORPORATE SOCIAL RESPONSIBILITY AND ENVIRONMENTAL MANAGEMENT, Issue 2 2005Charlotta Faith-Ell Abstract This paper examines the development and implementation of environmental requirements for trucks and construction vehicles in Swedish road maintenance contracts. The process in which the road administration involved relevant organizations in the development of a model for emission-based payment for the vehicles was analysed in a participatory study. Intentions behind the requirements were investigated using interviews and questionnaires. The results point to the importance of actively involving, informing and training all relevant parties. Transparency towards sub-contractors and the public is needed to justify the requirements. The payment model, based on environmental performance, is also suggested for use in other types of requirement in road maintenance contracts. To make green procurement an effective policy instrument, the model needs further development, e.g. systematic information, training of clients and contractors, and follow-up of the requirements. Copyright © 2005 John Wiley & Sons, Ltd and ERP Environment. [source] SIMPEROTA 1/3 , a decision support system for blue mould disease of tobacco,EPPO BULLETIN, Issue 2 2007P. Racca Blue mould (Peronospora tabacina) is the most serious threat to German tobacco crops. In order to efficiently control the disease whilst minimizing the risk of nontolerable fungicide residue levels on tobacco leaves, a decision support system has been developed which optimizes the timing of fungicide treatments. The DSS consists of two models, SIMPEROTA 1, which forecasts the dates of blue mould first appearance and SIMPEROTA 3 which forecasts the dates of fungicide applications. Crucial biological processes are included in the models (infection, mycelium growth, sporulation and spore release). Input parameters are temperature, relative humidity and leaf wetness recorded on an hourly basis. Validation with data from 2003 and 2006 showed that SIMPEROTA 1 gave satisfying results. The model is suitable for practical use and can be employed for steering monitoring efforts of extension services and for the timing of the first fungicide treatment. SIMPEROTA 3 gives advice on follow-up treatments and the length of spraying intervals, but this model needs to be validated before being introduced into practice. [source] A simplified v2,f model for near-wall turbulenceINTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Issue 12 2007M. M. Rahman Abstract A simplified version of the v2,f model is proposed that accounts for the distinct effects of low-Reynolds number and near-wall turbulence. It incorporates modified C,(1,2) coefficients to amplify the level of dissipation in non-equilibrium flow regions, thus reducing the kinetic energy and length scale magnitudes to improve prediction of adverse pressure gradient flows, involving flow separation and reattachment. Unlike the conventional v2,f, it requires one additional equation (i.e. the elliptic equation for the elliptic relaxation parameter fµ) to be solved in conjunction with the k,, model. The scaling is evaluated from k in collaboration with an anisotropic coefficient Cv and fµ. Consequently, the model needs no boundary condition on and avoids free stream sensitivity. The model is validated against a few flow cases, yielding predictions in good agreement with the direct numerical simulation (DNS) and experimental data. Copyright © 2007 John Wiley & Sons, Ltd. [source] The Leonardo effect: why entrepreneurs become their own fathersINTERNATIONAL JOURNAL OF APPLIED PSYCHOANALYTIC STUDIES, Issue 2 2005Carlo Strenger Abstract In depth investigation of male entrepreneurs shows a consistent finding: a large proportion of male entrepreneurs tend to experience their fathers as weak, inefficient, abusive, or absent. "Fatherlessness," as we call this constellation, is, of course, not of itself either a necessary or sufficient condition for entrepreneurship, and even less for successful entrepreneurship. The present paper tries to identify the psychodynamic constellation that allows some entrepreneurs to psychologically deal with the experience of fatherlessness and to transform it into an asset. We do so using Freud's hypothesis that Leonardo da Vinci's extreme independence of mind was one of the predisposing factors to his extreme inquisitiveness and creativity. This model needs to be combined with the insight that fatherlessness isper seharmful. Through detailed case studies it is shown how only those who truly come to terms with fatherlessness can become successful entrepreneurs, whereas those who remain fixated to the rage and disappointment generated by fatherlessness are bound to become what we call self- destroyers out of unconscious guilt or grandiose dreamers. The paper concludes with some practical advice on how to identify the various types. Copyright © 2005 Whurr Publishers Ltd. [source] A critical essay on professional development in dietetics through a process of reflection and clinical supervisionJOURNAL OF HUMAN NUTRITION & DIETETICS, Issue 5 2000S. Burton Background The concept of clinical supervision is well known within the nursing profession though numerous definitions and theoretical models proposed for implementation have led to a degree of confusion. The debate within dietetics is just beginning, with the recent formation of a BDA working group seeking to clarify clinical supervision for the profession. Aims This essay provides an overview of clinical supervision together with reflection which is considered to be integral to the process and proposes that clinical supervision can provide a vehicle for supporting continuous professional development for all dietitans. It is perhaps unfortunate that the descriptive ,clinical' is used throughout the literature as this often leads to an incorrect assumption that the scope of the process is limited to acute services. However, as patient care takes many forms within a range of environments, the broader meaning of ,clinical' as pertaining to ,patient care' needs to be acknowledged. Caution in choosing a model for the profession is advised, as any model needs to fit the practice and not vice versa. [source] | ||||||||||