Direct Implications (direct + implication)

Distribution by Scientific Domains


Selected Abstracts


Prediction of spatially distributed seismic demands in specific structures: Ground motion and structural response

EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, Issue 5 2010
Brendon A. Bradley
Abstract The efficacy of various ground motion intensity measures (IMs) in the prediction of spatially distributed seismic demands (engineering demand parameters, (EDPs)) within a structure is investigated. This has direct implications to building-specific seismic loss estimation, where the seismic demand on different components is dependent on the location of the component in the structure. Several common IMs are investigated in terms of their ability to predict the spatially distributed demands in a 10-storey office building, which is measured in terms of maximum interstorey drift ratios and maximum floor accelerations. It is found that the ability of an IM to efficiently predict a specific EDP depends on the similarity between the frequency range of the ground motion that controls the IM and that of the EDP. An IMs predictability has a direct effect on the median response demands for ground motions scaled to a specified probability of exceedance from a ground motion hazard curve. All of the IMs investigated were found to be insufficient with respect to at least one of magnitude, source-to-site distance, or epsilon when predicting all peak interstorey drifts and peak floor accelerations in a 10-storey reinforced concrete frame structure. Careful ground motion selection and/or seismic demand modification is therefore required to predict such a spatially distributed demands without significant bias. Copyright © 2009 John Wiley & Sons, Ltd. [source]


On the Use of the Moving Average Trading Rule to Test for Weak Form Efficiency in Capital Markets

ECONOMIC NOTES, Issue 2 2008
Alexandros E. Milionis
The examination for the possible existence of predictive power in the moving average trading rule has been used extensively to test the hypothesis of weak form market efficiency in capital markets. This work focuses mainly on the study of the variation of the moving average (MA) trading rule performance as a function of the length of the longer MA. Empirical analysis of daily data from NYSE and the Athens Stock Exchange reveal high variability of the performance of the MA trading rule as a function of the MA length and on some occasions the series of successive trading rule total returns is non-stationary. These findings have direct implications in weak form market efficiency testing. Indeed, given this high variability of the performance of the MA trading rule, by just finding out that trading rules with some specific combinations of MA lengths can or cannot beat the market, as is the case in most of the published work thus far, is not enough evidence for or against the existence of weak form market efficiency. Results also show that on average in about three out of four cases trading rule signals are false, a fact that leaves a lot of space for improved trading rule performance if trading rule signals are combined with other information (e.g. filters, or volume of trade). Finally, some evidence of enhanced trading rule performance for the shorter MA lengths was found. This enhanced performance is partly attributed to the higher probability that a trading rule signal is not a whipsaw, as well as to the larger number of days out-of-the-market which are associated with shorter MA lengths. [source]


Spatial characterization of arbuscular mycorrhizal fungal molecular diversity at the submetre scale in a temperate grassland

FEMS MICROBIOLOGY ECOLOGY, Issue 2 2008
Daniel L. Mummey
Abstract Although arbuscular mycorrhizal fungi (AMF) form spatially complex communities in terrestrial ecosystems, the scales at which this diversity manifests itself is poorly understood. This information is critical to the understanding of the role of AMF in plant community composition. We examined small-scale (submetre) variability of AMF community composition (terminal restriction fragment length polymorphism fingerprinting) and abundance (extraradical hyphal lengths) in two 1 m2 plots situated in a native grassland ecosystem of western Montana. Extraradical AMF hyphal lengths varied greatly between samples (14,89 m g soil,1) and exhibited spatial structure at scales <30 cm. The composition of AMF communities was also found to exhibit significant spatial autocorrelation, with correlogram analyses suggesting patchiness at scales <50 cm. Supportive of overall AMF community composition analyses, individual AMF ribotypes corresponding to specific phylogenetic groups exhibited distinct spatial autocorrelation. Our results demonstrate that AMF diversity and abundance can be spatially structured at scales of <1 m. Such small-scale heterogeneity in the soil suggests that establishing seedlings may be exposed to very different, location dependent AMF communities. Our results also have direct implications for representative sampling of AMF communities in the field. [source]


The 3D shear experiment over the Natih field in Oman: the effect of fracture-filling fluids on shear propagation

GEOPHYSICAL PROSPECTING, Issue 2 2001
C.M. Van Der Kolk
This is the final paper in a series on the 3D multicomponent seismic experiment in Oman. In this experiment a 3D data set was acquired using three-component geophones and with three source orientations. The data set will subsequently be referred to as the Natih 9C3D data set. We present, for the first time, evidence demonstrating that shear waves are sensitive to fluid type in fractured media. Two observations are examined from the Natih 9C3D data where regions of gas are characterized by slow shear-wave velocities. One is that the shear-wave splitting map of the Natih reservoir exhibits much larger splitting values over the gas cap on the reservoir. This increase in splitting results from a decrease in the slow shear-wave velocity which senses both the fractures and the fracture-filling fluid. Using a new effective-medium model, it was possible to generate a splitting map for the reservoir that is corrected for this fluid effect. Secondly, an anomaly was encountered on the shear-wave data directly above the reservoir. The thick Fiqa shale overburden exhibits a low shear-wave velocity anomaly that is accompanied by higher shear reflectivity and lower frequency content. No such effects are evident in the conventional P-wave data. This feature is interpreted as a gas chimney above the reservoir, a conclusion supported by both effective-medium modelling and the geology. With this new effective-medium model, we show that introduction of gas into vertically fractured rock appears to decrease the velocity of shear waves (S2), polarized perpendicular to the fracture orientation, whilst leaving the vertical compressional-wave velocity largely unaffected. This conclusion has direct implications for seismic methods in exploration, appraisal and development of fractured reservoirs and suggests that here we should be utilizing S-wave data, as well as the conventional P-wave data, as a direct hydrocarbon indicator. [source]


Critical appraisal of rigour in interpretive phenomenological nursing research

JOURNAL OF ADVANCED NURSING, Issue 2 2006
Lorna De Witt BScN RN
Aim., This paper reports a critical review of published nursing research for expressions of rigour in interpretive phenomenology, and a new framework of rigour specific to this methodology is proposed. Background., The rigour of interpretive phenomenology is an important nursing research methods issue that has direct implications for the legitimacy of nursing science. The use of a generic set of qualitative criteria of rigour for interpretive phenomenological studies is problematic because it is philosophically inconsistent with the methodology and creates obstacles to full expression of rigour in such studies. Methods., A critical review was conducted of the published theoretical interpretive phenomenological nursing literature from 1994 to 2004 and the expressions of rigour in this literature identified. We used three sources to inform the derivation of a proposed framework of expressions of rigour for interpretive phenomenology: the phenomenological scholar van Manen, the theoretical interpretive phenomenological nursing literature, and Madison's criteria of rigour for hermeneutic phenomenology. Findings., The nursing literature reveals a broad range of criteria for judging the rigour of interpretive phenomenological research. The proposed framework for evaluating rigour in this kind of research contains the following five expressions: balanced integration, openness, concreteness, resonance, and actualization. Balanced integration refers to the intertwining of philosophical concepts in the study methods and findings and a balance between the voices of study participants and the philosophical explanation. Openness is related to a systematic, explicit process of accounting for the multiple decisions made throughout the study process. Concreteness relates to usefulness for practice of study findings. Resonance encompasses the experiential or felt effect of reading study findings upon the reader. Finally, actualization refers to the future realization of the resonance of study findings. Conclusion., Adoption of this or similar frameworks of expressions of rigour could help to preserve the integrity and legitimacy of interpretive phenomenological nursing research. [source]


Social perceptions of cancer and their impacts: implications for nursing practice arising from the literature

JOURNAL OF ADVANCED NURSING, Issue 3 2000
Jean Flanagan MSc BSc RGN RNT
Social perceptions of cancer and their impacts: implications for nursing practice arising from the literature At the millennium cancer still holds a special mystique and is imbued with socio-cultural meanings, which extend far beyond the rational, scientific and biological facts of the disease. Excessive fear and dread may cause family and friends to display avoidance or overprotective behaviours to the ill person, who may subsequently perceive dissatisfaction with social support. Drawing on a literature review this paper explores the impact of cancer on social relationships. Interpersonal strain in relationship is often explained in the stigmatization of the illness and this concept is explored through contemporary social theorizing. These findings have direct implications for nursing practice where the goal of care is to enhance the support relationship. [source]


Advances in the larval rearing of Siberian sturgeon

JOURNAL OF FISH BIOLOGY, Issue 5 2002
E. Gisbert
Since first large-scale attempts to culture sturgeon from the larval stage were carried out in the former U.S.S.R. at the end of the nineteenth century, rearing technology has advanced considerably during the last 20 years and noticeable improvements in incubation and larval rearing techniques have been implemented in normal hatchery procedures. Siberian sturgeon eggs are incubated in MacDonald jars at 13,14° C to prevent fungal infections. Mass hatching takes place 7 days after fertilization and hatching rate can be predicted as a function of the percentage of eggs fertilized. Survival at the end of the endogenous feeding stage is correlated with hatching rate. Egg size has no direct implications for larval growth and survival of Siberian sturgeon. Experimental studies have demonstrated that behavioural observations are useful criteria to assess the quality of larvae and to synchronize the physiological state of fish with the appropriate rearing procedures. Special attention should be given to the transition to exogenous feeding, where cannibalism, difficulties in adaptation to a new diet, overfeeding and resulting bacterial infections dramatically reduces survival to the fingerling stage. Although a commercial artificial diet specifically formulated for larvae of Siberian sturgeon and other acipenserids is still lacking, commercial non-purified rainbow trout diets and starter marine fish diets are currently used and their results are reasonably acceptable in terms of larval growth and survival. Further research must be focused on the determination of egg quality indicators in order to provide the producer with the tools to estimate the viability and performance of theprogeny. [source]


Barriers to Innovation among Spanish Manufacturing SMEs

JOURNAL OF SMALL BUSINESS MANAGEMENT, Issue 4 2009
Antonia Madrid-Guijarro
Innovation is widely recognized as a key factor in the competitiveness of nations and firms. Small firms that do not embrace innovation within their core business strategy run the risk of becoming uncompetitive because of obsolete products and processes. Innovative firms are a perquisite for a dynamic and competitive economy. This paper reports on the results of a study that examined barriers to firm innovation among a sample of 294 managers of small and medium-sized enterprises (SMEs) in Spain. The study examined the relation between (1) product, process, and management innovation and (2) 15 obstacles to innovation, which can limit a firm's ability to remain competitive and profitable. Findings of the study show that barriers have a differential impact on the various types of innovation; product, process, and management innovation are affected differently by the different barriers. The most significant barriers are associated with costs, whereas the least significant are associated with manager/employee resistance. Additionally, the results demonstrate that the costs associated with innovation have proportionately greater impact on small than on larger firms. The findings can be used in the development of public policy aimed at supporting and encouraging the innovation among SMEs in Spain. Government policies that encourage and support innovation among all firms, especially small firms, can help countries remain competitive in a global market. Public policy that encourages innovation can enable firms to remain competitive and survive, both of which have direct implications for employment and a country's economic viability. The results may also be insightful for managers who are attempting to encourage innovation. Understanding barriers can assist managers in fostering an innovative culture by supporting new ideas or by avoiding an attitude that creates resistance to new ideas. [source]


Cost efficiency and value driver analysis of insurers in an emerging economy

MANAGERIAL AND DECISION ECONOMICS, Issue 4 2009
Attiea Marie
This study investigated cost inefficiencies and its relationship with value drivers of insurers in United Arab Emirates (UAE). The study revealed that there were 21,33% cost inefficiencies in these insurers under different model specifications of stochastic frontier and DEA; value drivers such as lower leverage risk, lower capital risk significantly improved cost efficiencies consistent with Basel II norms; ROE positively influenced cost efficiencies with further trade off between increased profit margin, decreased asset utilization and/or reduced equity multiplier by the insurer managements to achieve a target-ROE; and the trend of cost efficiency was improving during 2000,2004. The study suggests that stock insurers could overcome their cost inefficiencies through adoption of efficient measures such as risk mapping of clients, risk prioritization besides ALM techniques. The study has direct implications for individual and institutional investors in making their portfolio investment decisions in insurance sector, policymakers, and regulators to closely monitor inefficient insurers consistent with Basel II norms. Copyright © 2008 John Wiley & Sons, Ltd. [source]


A micro-simulation model of firms: Applications of concepts of the demography of the firm

PAPERS IN REGIONAL SCIENCE, Issue 2 2000
Leo van Wissen
Demography of the firm; regional economic growth; micro-simulation; firm formation; firm dissolution Abstract. Recently, there is an increasing demand in spatial planning for models based on the demographic concepts of birth and death of firms. This article describes the structure of a spatial demographic simulation model of firms, and its application within The Netherlands. The model structure is essentially of the familiar demographic cohort component type, where an initial cohort of firms ages in a number of discrete steps, and where in each step additions and subtractions to and from the population are modelled using birth, death and migration components. Apart from the central processes of birth, death and migration, the type of economic activity and firm size are highly important for understanding firm behaviour over time. The article describes the transition functions for each of the demographic components and for firm growth. In addition, some empirical results are presented of a number of model simulations in The Netherlands. The results were partly validated using observed economic demographic data. It is concluded that a substantial amount of work remains to be done in this new field. The model presented here has direct implications for the research agenda of the study of the demography of the firm. [source]


Analytic impasse and the third: Clinical implications of intersubjectivity theory

THE INTERNATIONAL JOURNAL OF PSYCHOANALYSIS, Issue 2 2006
LEWIS ARON
The author examines the notion of the third within contemporary intersubjectivity theory. He utilizes a variety of metaphors (the triangle, the seesaw, strange attractors, and the compass) in an effort to explain this often misunderstood concept in a clear and readily usable manner. An argument is made to the effect that intersubjectivity theory has direct implications for clinical practice, and that the notion of the third is particularly useful in understanding what happens in and in resolving clinical impasses and stalemates. Specifi cally, the author suggests that certain forms of self-disclosure are best understood as attempts to create a third point of reference, thus opening up psychic space for self-refl ection and mentalization. He provides a clinical case as well as a number of briefer vignettes to illustrate the theoretical concepts and to suggest specifi c modifi cations of the psychoanalyst's stance that give the patient greater access to the inner workings of the analyst's mind. This introduces a third that facilitates the gradual transformation from relations of complementarity to relations of mutuality. [source]


The Relative Importance of Interfirm Relationships and Knowledge Transfer for New Product Development Success,

THE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 2 2007
Mette Praest Knudsen
The relationship and network literature has primarily focused on particular partner types, for example, buyer,supplier relationships or competitor interaction. This article explores the nature and relative importance of different types of interfirm relationships for new product development (NPD) success. The underlying premise of the study is that not only the type of interfirm relationships but also the combination of relationships are important for NPD performance. The interaction with a specific type of partner is expected to influence innovative performance by means of appropriate knowledge transfer. Varying needs for external knowledge, and thus types of relationships, are observed depending on the particular stages in the NPD process, the character of the knowledge base of the firm, and the industrial conditions. The absorption of external knowledge is discussed using the degree of redundancy in knowledge, which is defined as the degree of overlap in the knowledge base of the sender and the recipient of knowledge. Hence, the degree of redundancy has direct implications for the ease and, hence, use of knowledge shared with an external partner. The article is based on data from the Know for Innovation survey on innovative activities among European firms, which was carried out in 2000 in seven European countries covering five industries. The article explores the extent of use of external relationships in collaborative product development and finds that customers are involved more frequently in joint development efforts. Second, the industry association of the most important relationship is studied, and the results show that firms tend to partner with firms from their own industry. The danger in this approach is that firms from their own industry tend to contribute similar knowledge, which ultimately may endanger the creation of new knowledge and therefore more radical product developments. The analyses combine the finding that relationships with customers are used most frequently at both early and late stages of the product development process, with a second and more contradictory finding that at the same time customer relationships have a negative impact on innovative success. Moreover, the combination of customers, with both universities and competitors, has a significant negative effect on innovative performance. The potential causes of this apparent paradox can be narrowed down to two: (1) the average customer may be unable to articulate needs for advanced technology-based products; and (2) the average customer may be unable to conceptualize ideas beyond the realm of his or her own experience. Based on this evidence the article cautions product development managers to think explicitly about what certain customers can contribute with and, more importantly, to match this contribution directly with their own sense of what direction product development should go in the future. Finally, the role of complementary as well as supplementary knowledge is investigated for innovative success finding that sharing of supplementary knowledge with external partners in NPD leads to a positive effect on innovative performance. The article is concluded by a discussion of the implication of this finding for building knowledge within the firm and for selecting external partners for NPD. [source]


Healthy Country, Healthy People: Policy Implications of Links between Indigenous Human Health and Environmental Condition in Tropical Australia

AUSTRALIAN JOURNAL OF PUBLIC ADMINISTRATION, Issue 1 2009
Stephen T. Garnett
Investment in programs that help Indigenous people undertake work maintaining the environmental health of their country has benefits for the environment as well as the physical, mental and cultural health of the Indigenous people involved. For health these findings have direct implications for some national health policies, service provision to homelands, health promotion and Indigenous health research. There are also direct implications for environmental investment in northern Australia and the design and regulation of markets in resource entitlements. Indirectly the findings should be important for economic, employment and education policies as well as those promoting social harmony. Given the range of benefits there is a strong argument for cross-agency investment in working on country by Indigenous people. [source]


Influence of point-source sediment-supply on modern shelf-slope morphology: implications for interpretation of ancient shelf margins

BASIN RESEARCH, Issue 5 2009
Cornel Olariu
ABSTRACT Present sea-floor bathymetry indicates that the continental-shelf and shelf-break morphology have some unique and predictable characteristics in areas with and without high sediment supply. Using a global bathymetry dataset in open shelf areas in front of rivers that discharge over 25 × 106 tons of sediment per year, five distinct accretionary types of shelf-break are distinguished based on along-shelf gradient variability and inferred shelf-break trajectory. Morphological characteristics of river-mouth shelves (compared with adjacent areas lateral to the immediate fairway of the river) are: (1) an overall lower gradient and greater width, and (2) a relatively high slope gradient/shelf gradient ratio. The exceptions are shelves with active shelf-edge deltas; these are narrower, steeper and have an attenuated shelf break in front of rivers. These observations are at seismic scale and have direct implications for the recognition and positioning of principal cross-shelf, supply fairways on ancient shelves or shelf margins, and therefore the potential by-pass routes for deepwater sands. Higher slope/shelf gradient ratios in areas of actively accreting margins, where the shelf-break is more prominent and easier to recognize on seismic data compared with adjacent areas, predict areas with high sediment supply. Along-strike morphological changes on supply-dominated shelves suggest that identification of the sediment-feed route and depocenter relative to the shelf break during a relative sea level cycle are critical for understanding/predicting the 3-D architecture of the shelf-slope-basin floor clinoform. [source]


Ethnicity and gestational diabetes in New York City, 1995,2003

BJOG : AN INTERNATIONAL JOURNAL OF OBSTETRICS & GYNAECOLOGY, Issue 8 2008
DA Savitz
Objective, To characterise the patterns of occurrence of gestational diabetes among a wide range of ethnic groups that reside in New York City. Design, Birth records and hospital discharge data were linked to more accurately assess the risk of gestational diabetes by ethnicity, compare risk in US-born to foreign-born women, and assess time trends. Setting, New York City. Population, All singleton live births occurring between 1995 and 2003. Methods, Multivariable binomial regression analysis of ethnicity and gestational diabetes, yielding adjusted risk ratios with non-Hispanic white women as the referent. Main outcome measure, Diagnosis of gestational diabetes on birth certificate or in hospital discharge. Results, Adjusted relative risks (aRRs) were modestly elevated for African-Americans and sub-Saharan Africans and somewhat higher (<2.0) for non-Hispanic Caribbeans, Hispanic Caribbeans, Central Americans, and South Americans. The aRR was 4.7 (95% CI = 4.6,4.9) for South Central Asians (with an absolute gestational diabetes risk of 14.3%), 2.8 (95% CI = 2.7,3.0) among South-East Asian and Pacific Islanders, and 2.3 (95% CI = 2.2,2.4) among East Asians. Among South Central Asians, the greatest risks were found for women from Bangladesh (aRR = 7.1, 95% CI = 6.8,7.3). Foreign-born women consistently had higher risk than US-born women. Risk for gestational diabetes increased over time among South Central Asians, some Hispanic groups, and African-Americans. Conclusions, Risk of gestational diabetes appears to vary markedly among ethnic groups, subject to potential artefacts associated with screening and diagnosis. These differences would have direct implications for health care and may suggest aetiologic hypotheses. [source]


Interferon-,2a is sufficient for promoting dendritic cell immunogenicity

CLINICAL & EXPERIMENTAL IMMUNOLOGY, Issue 3 2005
A. Tamir
Summary Type I interferons (IFNs) are widely used therapeutically. IFN-,2a in particular is used as an antiviral agent, but its immunomodulatory properties are poorly understood. Dendritic cells (DCs) are the only antigen-presenting cells able to prime naive T cells and therefore play a crucial role in initiating the adaptive phase of the immune response. We studied the effects of IFN-,2a on DC maturation and its role in determining Th1/Th2 equilibrium. We found that IFN-,2a induced phenotypic maturation of DCs and increased their allostimulatory capacity. When dendritic cells were stimulated simultaneously by CD40 ligation and IFN-,2a, the production of interleukin (IL)-10 and IL-12 was increased. In contrast, lipopolysaccharide (LPS) stimulation in the presence of IFN-,2a mainly induced IL-10 release. The production of IFN-, and IL-5 by the responder naive T cells was also amplified in response to IFN-,2a-treated DCs. Furthermore, IL-12 production by IFN-,2a-treated DCs was enhanced further in the presence of anti-IL-10 antibody. Different results were obtained when DCs were treated simultaneously with IFN-,2a and other maturation factors, in particular LPS, and then stimulated by CD40 ligation 36 h later. Under these circumstances, IFN-,2a did not modify the DC phenotype, and the production of IL-10/IL-12 and IFN-,/IL-5 by DCs and by DC-stimulated naive T cells, respectively, was inhibited compared to the effects on DCs treated with maturation factors alone. Altogether, this work suggests that IFN-,2a in isolation is sufficient to promote DC activation, however, other concomitant events, such as exposure to LPS during a bacterial infection, can inhibit its effects. These results clarify some of the in vivo findings obtained with IFN-,2a and have direct implications for the design of IFN-,-based vaccines for immunotherapy. [source]