Different Rules (different + rule)

Distribution by Scientific Domains


Selected Abstracts


Detention of the mentally ill in Europe , a review

ACTA PSYCHIATRICA SCANDINAVICA, Issue 1 2002
Martin Zinkler
Objective:,The frequency of compulsory admission varies widely across Europe. Although there has been some research on a nation-wide level, no work has been done to compare mental health legislation in different countries in relation to detention rates and to patients' perception of hospital detention. Method:,Databases and government statistics were searched for regional, national and European data. Legal frameworks were compared and reviewed in relation to patients' and professionals' views. Results:,Nearly 20-fold variations in detention rates were found in different parts of Europe. Criteria for detention of the mentally ill are broadly similar when it comes to patients at risk to themselves or others. However different rules apply for involuntary treatment in the interest of the patient's health. Conclusion:,Variations in detention rates across Europe appear to be influenced by professionals' ethics and attitudes, sociodemographic variables, the public's preoccupation about risk arising from mental illness and the respective legal framework. [source]


The maximum entropy formalism and the idiosyncratic theory of biodiversity

ECOLOGY LETTERS, Issue 11 2007
Salvador Pueyo
Abstract Why does the neutral theory, which is based on unrealistic assumptions, predict diversity patterns so accurately? Answering questions like this requires a radical change in the way we tackle them. The large number of degrees of freedom of ecosystems pose a fundamental obstacle to mechanistic modelling. However, there are tools of statistical physics, such as the maximum entropy formalism (MaxEnt), that allow transcending particular models to simultaneously work with immense families of models with different rules and parameters, sharing only well-established features. We applied MaxEnt allowing species to be ecologically idiosyncratic, instead of constraining them to be equivalent as the neutral theory does. The answer we found is that neutral models are just a subset of the majority of plausible models that lead to the same patterns. Small variations in these patterns naturally lead to the main classical species abundance distributions, which are thus unified in a single framework. [source]


2,5-Disubstituted Pyrrolidines as Chiral Auxiliaries in Radical Reactions: A Theoretical Approach

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 25 2010
Miglena K. Georgieva
Abstract The radical addition to amides derived from chiral 2,5-disubstituted pyrrolidines has been theoretically studied by the use of density functional methods and the results compared with known experimental data. The results agree quite well with those obtained experimentally and allow the full rationalization of the factors influencing the diastereoselectivity. Steric effects are the main factors determining the selectivity, but electronic interactions can also be very important when the attacking alkene is ,,,-conjugated, as in acrylic esters or acrylamides. Additions at the ,- and ,-positions of the amide chain in the auxiliary are subject to different rules, with the former usually yielding high diastereoselectivities both experimentally and theoretically, whereas the latter is theoretically predicted to occur with low selectivity. We fully rationalize these two opposite behaviours and suggest several ways to circumvent this limitation, thus strongly increasing the interest of this type of structure as chiral auxiliaries in radical reactions. [source]


Aspects of tax pertaining to insolvency law in South Africa,

INTERNATIONAL INSOLVENCY REVIEW, Issue 3 2005
Elzette Muller
This paper seeks to briefly analyse the somewhat convoluted provisions contained in South African tax legislation that apply to insolvent entities in South Africa. While South Africa has modern and effective taxation laws, the provisions, when applied to insolvent entities, are often exposed as cumbersome and ineffective. Tax legislation in South Africa does not take proper cognisance of the unique nature of insolvency, often placing a heavy burden on the trustee or liquidator who is required to administer the estate as speedily and effectively as possible. In addition, there are different rules that apply to consumer and corporate insolvency regarding the assessment of income tax pre- and post-liquidation. The recent introduction of a capital gains tax has placed an additional burden on insolvency practitioners, especially considering the lack of clarity as to how these provisions should be applied in practice. Although the Value-Added Tax Act was introduced more than a decade ago, its provisions continue to pose problems for insolvency practitioners during the administration process of insolvent estates. Despite these difficulties, the South African revenue authorities are to be lauded for the sensible manner in which problems are addressed in practice. Copyright © 2005 John Wiley & Sons, Ltd. [source]


Assessing monetary rules performance across EMU countries

INTERNATIONAL JOURNAL OF FINANCE & ECONOMICS, Issue 2 2003
Carlo Altavilla
Abstract The topic covered in this paper is the performance of different monetary policy rules used as guidelines in practical policy making. To this end, different rules are evaluated using alternative econometrics techniques. A comparative analysis is made of the ability of the rules to correspond to the historical central bank behaviour and of the volatility of output, inflation and interest rate changes that they imply. The study is conducted of the EMU countries. The results suggest that simple rules perform quite well and that the advantages obtained from adopting an optimal control-based rule are not so great. Moreover, the addition of a forward-looking dimension and of an interest rate smoothing term in the reaction function seems to improve the performance of the rules. Copyright © 2003 John Wiley & Sons, Ltd. [source]


A fuzzy logic approach to experience-based reasoning

INTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS, Issue 8 2007
Zhaohao Sun
Experience-based reasoning (EBR) is a reasoning paradigm that has been used in almost every human activity such as business, military missions, and teaching activities since early human history. However, EBR has not been seriously studied from either a logical or mathematical viewpoint, although case-based reasoning (CBR) researchers have paid attention to EBR to some extent. This article will attempt to fill this gap by providing a unified fuzzy logic-based treatment of EBR. More specifically, this article first reviews the logical approach to EBR, in which eight different rules of inference for EBR are discussed. Then the article proposes fuzzy logic-based models to these eight different rules of inference that constitute the fundamentals for all EBR paradigms from a fuzzy logic viewpoint, and therefore will form a theoretical foundation for EBR. The proposed approach will facilitate research and development of EBR, fuzzy systems, intelligent systems, knowledge management, and experience management. © 2007 Wiley Periodicals, Inc. Int J Int Syst 22: 867,889, 2007. [source]


Long-range and short-range mechanisms of hydrophobic attraction and hydrophilic repulsion in specific and aspecific interactions

JOURNAL OF MOLECULAR RECOGNITION, Issue 4 2003
Carel Jan van Oss
Abstract Among the three different non-covalent forces acting in aqueous media, i.e. Lifshitz,van der Waals (LW), Lewis acid,base (AB) and electrical double layer (EL) forces, the AB forces or electron,acceptor/electron,donor interactions are quantitatively by far the predominant ones. A subset of the AB forces acting in water causes the hydrophobic effect, which is the attraction caused by the hydrogen-bonding (AB) free energy of cohesion between the water molecules which surround all apolar as well as polar molecules and particles when they are immersed in water. As the polar energy of cohesion among water molecules is an innate property of water, the hydrophobic attraction (due to the hydrophobic effect) is unavoidably always present in aqueous media and has a value of ,Ghydrophobic,=,,102,mJ/m2, at 20,°C, being equal to the AB free energy of cohesion between the water molecules at that temperature. The strong underlying hydrophobic attraction due to this effect can, however, be surmounted by very hydrophilic molecules and particles that attract water molecules more strongly than the free energy of attraction of these molecules or particles for one another, plus the hydrogen-bonding free energy of cohesion between the water molecules, thus resulting in a net non-electrical double layer repulsion. Each of the three non-covalent forces, LW, AB or EL, any of which can be independently attractive or repulsive, decays, dependent on the circumstances, as a function of distance according to different rules. These rules, following an extended DLVO (XDLVO) approach, are given, as well as the measurement methods for the LW, AB and EL surface thermodynamic properties, determined at ,contact'. The implications of the resulting hydrophobic attractive and hydrophilic repulsive free energies, as a function of distance, are discussed with respect to specific and aspecific interactions in biological systems. The discussion furnishes a description of the manner by which shorter-range specific attractions can surmount the usually much stronger long-range aspecific repulsion, and ends with examples of in vitro and in vivo effects of hydrophilization of biopolymers, particles or surfaces by linkage with polyethylene oxide (PEO; also called polyethylene glycol, PEG). Copyright © 2003 John Wiley & Sons, Ltd. [source]