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Particular State (particular + state)

Distribution by Scientific Domains

Business, Economics, Finance and Accounting	60%

Selected Abstracts

Relation of apical dendritic spikes to output decision in CA1 pyramidal cells during synchronous activation: a computational study

EUROPEAN JOURNAL OF NEUROSCIENCE, Issue 5 2006
José M. Ibarz
Abstract Recent studies on the initiation and propagation of dendritic spikes have modified the classical view of postsynaptic integration. Earlier we reported that subthreshold currents and spikes recruited by synaptic currents play a critical role in defining outputs following synchronous activation. Experimental factors strongly condition these currents due to their nonlinear behaviour. Hence, we have performed a detailed parametric study in a CA1 pyramidal cell model to explore how different variables interact and initiate dendritic spiking, and how they influence cell output. The input pattern, the relative excitability of axon and dendrites, the presence/modulation of voltage-dependent channels, and inhibition were cross analysed. Subthreshold currents and spikes on synaptically excited branches fired spikes in other branches to jointly produce different modalities of apical shaft spiking with a variable impact on cell output. Synchronous activation initiated a varying number and temporal scatter of firing branches that produced in the apical shaft-soma axis nonpropagating spikes, pseudosaltatory or continuous forward conduction, or backpropagation. As few as 6,10 local spikes within a time window of 2 ms ensure cell output. However, the activation mode varied extremely when two or more variables were cross-analysed, becoming rather unpredictable when all the variables were considered. Spatially clustered inputs and upper modulation of dendritic Na+ or Ca2+ electrogenesis favour apical decision. In contrast, inhibition biased the output decision toward the axon and switched between dendritic firing modes. We propose that dendrites can discriminate input patterns and decide immediate cell output depending on the particular state of a variety of endogenous parameters. [source]

A Framework for Valuing Derivative Securities

FINANCIAL MARKETS, INSTITUTIONS & INSTRUMENTS, Issue 5 2001
Philip Gray
This paper develops a general framework for valuing a wide range of derivative securities. Rather than focusing on the stochastic process of the underlying security and developing an instantaneously-riskless hedge portfolio, we focus on the terminal distribution of the underlying security. This enables the derivative security to be valued as the weighted sum of a number of component pieces. The component pieces are simply the different payoffs that the security generates in different states of the world, and they are weighted by the probability of the particular state of the world occurring. A full set of derivations is provided. To illustrate its use, the valuation framework is applied to plain-vanilla call and put options, as well as a range of derivatives including caps, floors, collars, supershares, and digital options. [source]

Critically challenging some assumptions in HRD

INTERNATIONAL JOURNAL OF TRAINING AND DEVELOPMENT, Issue 1 2006
David O'Donnell
This paper sets out to critically challenge five interrelated assumptions prominent in the (human resource development) HRD literature. These relate to: the exploitation of labour in enhancing shareholder value; the view that employees are co-contributors to and co-recipients of HRD benefits; the distinction between HRD and human resource management; the relationship between HRD and unitarism; and the relationship between HRD and organizational and learning cultures. From a critical modernist perspective, it is argued that these can only be adequately addressed by taking a point of departure from the particular state of the capital,labour relation in time, place and space. HRD, of its nature, exists in a continuous state of dialectical tension between capital and labour , and there is much that critical scholarship has yet to do in informing practitioners about how they might manage and cope with such tension. [source]

THE UNDERPINNINGS OF COUNTRY RISK ASSESSMENT

JOURNAL OF ECONOMIC SURVEYS, Issue 3 2008
Susan K. Schroeder
Abstract This paper surveys the history and current status of country risk assessment. The motivation is to understand why it is that country risk assessors have such a poor track record in anticipating the onset of financial crises. The development of the field reflects changes in the composition of international capital flows. These changes have confounded a definition of country risk, especially if a definition is centered on a particular event. It is then argued that the field has reached an impasse, and this impasse is related to the methods of abstraction and the current crisis of vision within the science of economics. This crisis of vision, as it pertains to theories of financial crises, has led to increased reliance on quantitative methods in the field of country risk. The paper concludes by proposing a new direction for the field, the first step towards which is to recognize that the object of country risk assessment is not to monitor for a particular event or symptom of financial crisis, but, rather, to monitor for a particular state of the economy. [source]

Language, history and the nation: an historical approach to evaluating language and cultural claims

NATIONS AND NATIONALISM, Issue 2 2008
VICKI SPENCER
ABSTRACT. In contrast to the abstract commitment to individual rights found in liberal critics of Bill 101 and the equally ahistorical approach of multicultural theorists like Bhikhu Parekh, this paper proposes that the particular historical circumstances surrounding the current minority status of different groups is crucial in evaluating the legitimacy of one cultural group to promote its cultural needs over another group within existing states. When the culture of a group residing within a particular state is secure in a neighbouring jurisdiction, the issue at stake is not necessarily the survival of a unique culture but the cultural needs of particular individuals. It does not follow that they have no legitimate claims against the state. However, in examining the language policies in Quebec and the newly independent Baltic states, it is argued that they are different in kind to the rights due to long-standing communities struggling for linguistic survival. [source]