The challenges of building theory by combining lenses

The article presents a discussion of foundational issues in the field of management science, focusing on advances in management theory and research. The metaphor of explanatory lenses is used as a rubric to illustrate the theoretical challenges involved in elucidating the interrelationships of various factors in organizational behavior. The importance of clarifying such interrelationships is emphasized, from the standpoint of editing scholarly papers on such topics for publication. Topics discussed include communication and psychology in management, economics, and behavioral finance.

Azimuthal Anisotropy of pi(0) Production in Au plus Au Collisions at root s(NN)=200 GeV: Path-Length Dependence of Jet Quenching and the Role of Initial Geometry

We have measured the azimuthal anisotropy of pi(0) production for 1 < p(T) < 18 GeV/c for Au + Au collisions at root s(NN) = 200 GeV. The observed anisotropy shows a gradual decrease for 3 less than or similar to p(T) less than or similar to 7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least similar to 10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and fluctuations is insufficient to account for this discrepancy. Calculations that implement a path-length dependence steeper than what is implied by current PQCD energy-loss models show reasonable agreement with the data.

Recent advances in the preparation and utilization of carbon nanotubes for hydrogen storage

Recent progress in the production, purification, and experimental and theoretical investigations of carbon nanotubes for hydrogen storage are reviewed. From the industrial point of view, the chemical vapor deposition process has shown advantages over laser ablation and electric-arc-discharge methods. The ultimate goal in nanotube synthesis should be to gain control over geometrical aspects of nanotubes, such as location and orientation, and the atomic structure of nanotubes, including helicity and diameter. There is currently no effective and simple purification procedure that fulfills all requirements for processing carbon nanotubes. Purification is still the bottleneck for technical applications, especially where large amounts of material are required. Although the alkali-metal-doped carbon nanotubes showed high H-2 Weight uptake, further investigations indicated that some of this uptake was due to water rather than hydrogen. This discovery indicates a potential source of error in evaluation of the storage capacity of doped carbon nanotubes. Nevertheless, currently available single-wall nanotubes yield a hydrogen uptake value near 4 wt% under moderate pressure and room temperature. A further 50% increase is needed to meet U.S. Department of Energy targets for commercial exploitation. Meeting this target will require combining experimental and theoretical efforts to achieve a full understanding of the adsorption process, so that the uptake can be rationally optimized to commercially attractive levels. Large-scale production and purification of carbon nanotubes and remarkable improvement of H-2 storage capacity in carbon nanotubes represent significant technological and theoretical challenges in the years to come.

The Limits of Rational Choice: New Institutionalism in the Test Bed of Central Banking Politics in Australia

This paper tests the explanatory capacities of different versions of new institutionalism by examining the Australian case of a general transition in central banking practice and monetary politics: namely, the increased emphasis on low inflation and central bank independence. Standard versions of rational choice institutionalism largely dominate the literature on the politics of central banking, but this approach (here termed RC1) fails to account for Australian empirics. RC1 has a tendency to establish actor preferences exogenously to the analysis; actors' motives are also assumed a priori; actor's preferences are depicted in relatively static, ahistorical terms. And there is the tendency, even a methodological requirement, to assume relatively simple motives and preference sets among actors, in part because of the game theoretic nature of RC1 reasoning. It is possible to build a more accurate rational choice model by re-specifying and essentially updating the context, incentives and choice sets that have driven rational choice in this case. Enter RC2. However, this move subtly introduces methodological shifts and new theoretical challenges. By contrast, historical institutionalism uses an inductive methodology. Compared with deduction, it is arguably better able to deal with complexity and nuance. It also utilises a dynamic, historical approach, and specifies (dynamically) endogenous preference formation by interpretive actors. Historical institutionalism is also able to more easily incorporate a wider set of key explanatory variables and incorporate wider social aggregates. Hence, it is argued that historical institutionalism is the preferred explanatory theory and methodology in this case.

Suomalainen tanssintutkimus esittäytyy englanniksi

Kirjallisuusarvostelu

Laserpohjaisen ainetta lisäävän menetelmän kykenevyys kapeiden muotojen sekä terävien kulmien valmistuksessa

Tässä työssä tarkastellaan laserpohjaisen ainetta lisäävän työstön kykenevyyttä kapeiden muotojen sekä terävien kulmien valmistuksessa. Tarkkuuteen sekä kykenevyyteen vaikuttavia tekijöitä selvitetään aimmissa tutkimuksissa havaittujen seikkojen pohjalta, sekä menetelmän ominaisuuksien perusteella. Selvityksen pohjalta valmistetaan koekappaleet, jotka koettelevat valmistuslaitteiston kykenevyyttä. Lopuksi suoritetaan vertailu teoreettisten sekä käytännön haasteiden välillä.

Exploratory study : exploring the effectiveness of a literacy-based intervention with children with language impairments

Research points clearly to the need for all concerned stakeholders to adopt a preventative approach while intervening with children who are at-risk for future reading disabilities. Research has indicated also that a particular sub-group of children at-risk for reading impairments include preschool children with language impairments (Catts, 1993). Preschool children with language impairments may have difficulties with emergent literacy skills - important prerequisite skills necessary for successful formal reading. Only in the past decade have researchers begun to study the effects of emergent literacy intervention on preschool children with language impairments. As such, the current study continues this investigation of how to effectively implement an emergent literacy therapy aimed at supporting preschool children with language impairments. In addition to this, the current study explores emergent literacy intervention within an applied clinical setting. The setting, presents a host of methodological and theoretical challenges - challenges that will advance the field of understanding children within naturalistic settings. This exploratory study included thirty-eight participants who were recruited from Speech Services Niagara, a local preschool speech and language program. Using a between-group pre- and posttest design, this study compared two intervention approaches - an experimental emergent literacy intervention and a traditional language intervention. The experimental intervention was adopted from Read It Again! (Justice, McGinty, Beckman, & Kilday, 2006) and the traditional language intervention was based on the traditional models of language therapy typically used in preschool speech and language models across Ontario. 5 Results indicated that the emergent literacy intervention was superior to the ,t..3>~, ~\., ;./h traditional language therapy in improving the children's alphabet knowledge, print and word awareness and phonological awareness. Moreover, results revealed that children with more severe language impairments require greater support and more explicit instruction than children with moderate language impairments. Another important finding indicated that the effects of the preschool emergent literacy intervention used in this study may not be sustainable as children enter grade one. The implications of this study point to the need to support preschool children with language impairments with intensive emergent literacy intervention that extends beyond preschool into formal educational settings.

La adolescencia: retos para la investigación y para la sociedad europea de cara al sigol XXI

A lo largo de la última década, la adolescencia ha sido un tema de discusión política en distintos espacios europeos al más alto nivel. En una sociedad aceleradamente cambiante se percibe que la adecuada socialización de las generaciones más jóvenes constituye un reto socio-histórico que nos afecta a todos. Los cambios en que estamos sumergidos son tan plurales (demográficos, sociales, tecnológicos, económicos, políticos, etc.) que generan un amplísimo frente de nuevos dilemas éticos. La opinión de los ciudadanos de la Unión Europea se muestra preocupada por nuevos valores y destaca la preferencia por la responsabilidad en coherencia con dicha situación cambiante. Todo este macrocontexto psicosocial viene planteando nuevos retos teóricos y de investigación a la comunidad científica. De hecho las ciencias humanas y sociales han empezado a desarrollar nuevas líneas de investigación para comprender mejor las nuevas relaciones entre adultos y adolescentes y las nuevas culturas que emergen entre estos últimos, impulsadas por nuevas aspiraciones sociales compartidas por grupos más o menos amplios de la población joven. El desarrollo de técnicas e instrumentos que nos permitan comprender mejor la perspectiva del adolescente se hace más evidente si analizamos su relación con las nuevas tecnologías de la información y la comunicación. Dichas tecnologías comportan nuevos riesgos, pero también nuevas oportunidades, entre las que destaca la posibilidad de establecer nuevas formas de relación. La motivación que muestran los más jóvenes por las nuevas tecnologías constituye un gran reto a los investigadores aplicados para sugerir formas de maximizar las potencialidades latentes

Gênero, sexualidade e educação formal no Brasil: uma análise preliminar da produção acadêmica entre 1990 e 2006

Cet article présente les résultats de la recherche Démocratisation de la connaissance: recherche de pointe sur le genre et l'éducation formelle comme soutien pour formuler des agendas et des actions de politiques gouvernementales et non gouvernementales. Développée entre 2006 et 2007, elle visait à met re à jour, systématiser et diffuser la connaissance accumulée dans la production universitaire brésilienne sur les liens entre l'éducation formelle et les thématiques du genre, des femmes et/ou de la sexualité. Une banque de données contenant le titre et le résumé de 1 213 dissertations, thèses et articles a été constituée. Nous soulignons autant les défis théoriques, concernant une meilleure compréhension des concepts étudiés par cete enquête, que les défis méthodologique, comme la définition des descripteurs et des sources devant être examinées. Sa conclusion présente des tableaux et graphiques qui tracent un portrait initial des documents disponibles dans la base de données et indiquent que ces thématiques ont été l'objet d'un intérêt croissant sur la période étudiée.

The changing roles of accountants in industry.

Both accountants and their professional associations have come under pressure in recent years to move with a changing environment. A research project was established therefore in order to study the present roles of accountants in industry, to consider how such roles have evolved, and to consider ways in which these roles might change in the future. Apart from these specific objectives, the thesis also attempts to come to terms with some of the major philosophical and theoretical challenges that face sociology. Given these broad aims, and given a limited amount of previous research, the approach was to derive tentative classifications and propositions from empirical investigation, rather than to test preconceived hypotheses. Data was obtained primarily from ninety-nine structured interviews with both accountants and other managers from twelve industrial enterprises. Aside from studying specifically the changing roles of accountants in industry, the following areas were investigated: the historical development of industrial organisations, accounting systems, and the professional accounting bodies; the process of occupational entry, socialisation, and career paths of accountants; and the current education, training, and career development of, and labour market for, accountants in industry. Despite variations according to accountants' positions, the sample's work characteristics and orientations were found to be similar to those of managers from other areas. In fact most accountants were more concerned with 'getting on' than committed to a career in accounting or to any particular professional association or employing organisation. While there was a move towards a more general business involvement for the majority of the sample, there was also in some cases an increasing demand for specialist accounting skills. In conclusion, although an eventual technological substitution for the work of accountants in industry is thought to be unlikely, their work is becoming more liable to evaluation and intervention form those outside their occupational group.

Monetáris politikai tendenciák I. Eszköztárak (Tendencies in monetary policy I. - Asset prices)

A közgazdaságtan, szűkebben a monetáris politika előtt két elméleti és gyakorlati kihívást látok: a globális egyensúlytalanságoknak nevezett jelenséget és az eszközár problematikát. Előbbi a világgazdaságban koncentráltan fölhalmozódó adósságokat és követelésállományokat jelenti, utóbbi a banki és nem banki pénzügyi piacok folyamatainak lehetséges pénzügypolitikai vonatkozásaira utal. Mondandómat két cikkben fogalmazom meg. Ez az írás először a monetáris stabilitás és instabilitás kérdéskörét mutatja be történeti keretben, ami tekinthető mindkét aktuális témakör földolgozásához szükséges elméleti fölvezetőnek is. Ezt követi a monetáris politika és az eszközárak kapcsolatának vizsgálata. A következő cikk foglalkozik a globális egyensúlytalanságokkal. Azért választottam e sorrendet, mert a két téma szorosan összefügg, az itt leírt magyarázatok segíthetik a későbbiek megértését. Az írásban többször megfogalmazok saját véleményt, a hangsúly mégis a szakirodalom bemutatásán van. / === / Global imbalances and asset price booms and busts are the two main practical and theoretical challenges in economics, especially in monetary policy. The first of them concerns the accumulative tendencies of debts and claims in the world economy, the second challenge deals with the processes of bank and non bank money markets. These topics are dealt with in two articles. The first one presents the issue of monetary stability and instability from a historical perspective. With that the connections between monetary policy and asset prices will be studied. The next article will deal with global imbalances. The topics are closely related and this order helps better understanding. The articles are mainly based on the current literature although I insert my own views as well.

Path-integral and Coarse-graining Strategies for Complex Molecular Phenomena

Molecular simulation provides a powerful tool for connecting molecular-level processes to physical observables. However, the facility to make those connections relies upon the application and development of theoretical methods that permit appropriate descriptions of the systems or processes to be studied. In this thesis, we utilize molecular simulation to study and predict two phenomena with very different theoretical challenges, beginning with (1) lithium-ion transport behavior in polymers and following with (2) equilibrium isotope effects with relevance to position-specific and clumped isotope studies. In the case of ion transport in polymers, there is motivation to use molecular simulation to provide guidance in polymer electrolyte design, but the length and timescales relevant for ion diffusion in polymers preclude the use of direct molecular dynamics simulation to compute ion diffusivities in more than a handful of candidate systems. In the case of equilibrium isotope effects, the thermodynamic driving forces for isotopic fractionation are often fundamentally quantum mechanical in nature, and the high precision of experimental instruments demands correspondingly accurate theoretical approaches. Herein, we describe respectively coarse-graining and path-integral strategies to address outstanding questions in these two subject areas.