168 research outputs found
Elements of Infrastructure: Factors Driving International Entrepreneurship
This article focuses on born globals (Knight and Cavusgil 1996) and interfirm resources to explain international entrepreneurship. The theory posed here challenges the traditional image of international business as a long, gradual process not occurring until later in the life cycle, and applying only to large multinational corporations (MNCs).
Increasingly, new ventures must expand their operations internationally early in their history in order to be competitive (Oviatt and McDougall 1994), and require infrastructure (Van de Ven 1993), or interfirm resources, for success. Specifically, firms may rely on three factors to expand internationally: cost factors, unique global resources, and networks
SNPMClust: Bivariate Gaussian Genotype Clustering and Calling for Illumina Microarrays
SNPMClust is an R package for genotype clustering and calling with Illumina microarrays. It was originally developed for studies using the GoldenGate custom genotyping platform but can be used with other Illumina platforms, including Infinium BeadChip. The algorithm first rescales the fluorescent signal intensity data, adds empirically derived pseudo-data to minor allele genotype clusters, then uses the package mclust for bivariate Gaussian model fitting. We compared the accuracy and sensitivity of SNPMClust to that of GenCall, Illumina's proprietary algorithm, on a data set of 94 whole-genome amplified buccal (cheek swab) DNA samples. These samples were genotyped on a custom panel which included 1064 SNPs for which the true genotype was known with high confidence. SNPMClust produced uniformly lower false call rates over a wide range of overall call rates
Doing Well and Happy About It? Explaining Variance in Entrepreneurs’ Stated Satisfaction with Performance
The importance of performance measurement is largely undisputed. There is debate, however, regarding the equivalency of objective and subjective performance measures. This debate has not considered a frequently used subjective measure, satisfaction with performance, to be an important measure independent of its equivalency with objective measures. Using a sample of 368 manufacturing firms, this study found that objective measures explained only a modest amount of variance in satisfaction with performance and that other variables added significantly to the explained variance.These factors included perceived environmental hostility, vulnerability, perceived competitive advantage, and commitment
Strategic Flexibility and SMEs: The Role of Information Technology for Managing Internal and External Relations
The purpose of the current study was to assess the impact of information technology on strategic flexibility for small- and medium-sized enterprises (SMEs). Results of the study show that under conditions of low environmental dynamism, IT capabilities are associated with greater reactive strategic flexibility. Specifically, IT capabilities enabling the management of internal activities was significant. Under conditions of high environmental dynamism, IT capabilities are associated with greater proactive strategic flexibility. Specifically, IT capabilities enabling the management of competitor information was significant. Managerial as well as future research implications are discussed
Small Business Internet Use and Strategic Flexibility
Research on SME Internet use has focused almost exclusively on factors leading to the adoption of Internet technologies. In this study, we focus on the potentially valuable connection between Internet use and strategic flexibility. Specifically, we propose that Internet use for communications will promote greater strategic flexibility for the small firm, but only in a dynamic environment. The results, based on a sample of 160 small Midwest companies, largely support this hypothesis. Environmental dynamism was found to moderate the relationship between Internet use for communications and strategic flexibility. Use of the Internet for communications was found to be positively and significantly related to strategic flexibility in a dynamic environment. As expected, dynamism did not moderate the relationship between Internet use for transactions and strategic flexibility. These findings hold implications for future research and for managers of small firms attempting to effectively leverage the Internet for competitive advantage
An Evaluation of Findings from a SBIRT Training Program in Counselor Education
The effective implementation of empirically supported interventions is critical for the mitigation of problematic substance use. Screening, Brief Intervention, and Referral to Treatment (SBIRT) has been identified as an efficacious approach for initial response to individuals who have, or are at risk of developing, a substance use disorder. For SBIRT to be delivered appropriately, helping professionals must be adequately trained in its implementation. As a part of a three-year grant project, counselor educators at a large Midwestern university provided intensive training on SBIRT to students in a counselor education program. The outcomes of this training, specifically related to satisfaction, opinion, knowledge, and perceived competence, are presented in this article
Screening, Brief Intervention and Referral to Treatment (SBIRT) Training with Counselor Education Students
Counselors should be proficient in screening for problematic substance use and also demonstrate the ability to provide a brief intervention, when appropriate. As part of a three-year grant project, counselor educators at one institution provided intensive training on Screening, Brief Intervention, and Referral to Treatment (SBIRT) to clinical mental health counseling students. This SBIRT protocol is designed to promote early detection and effective intervention for clients at risk of developing a substance use disorder. The purpose of this article is to present an in-depth narrative related to the process, content, and pedagogical methods of the training. The authors also address the lessons learned throughout the experience and provide recommendations to core faculty that may plan on incorporating SBIRT into curriculum
Laminar Cortical Dynamics of 3D Surface Perception: Stratification, transparency, and Neon Color Spreading
How does the laminar organization of cortical circuitry in areas VI and V2 give rise to 3D percepts of stratification, transparency, and neon color spreading in response to 2D pictures and 3D scenes? Psychophysical experiments have shown that such 3D percepts are sensitive to whether contiguous image regions have the same relative contrast polarity (dark-light or lightdark), yet long-range perceptual grouping is known to pool over opposite contrast polarities. The ocularity of contiguous regions is also critical for neon color spreading: Having different ocularity despite the contrast relationship that favors neon spreading blocks the spread. In addition, half visible points in a stereogram can induce near-depth transparency if the contrast relationship favors transparency in the half visible areas. It thus seems critical to have the whole contrast relationship in a monocular configuration, since splitting it between two stereogram images cancels the effect. What adaptive functions of perceptual grouping enable it to both preserve sensitivity to monocular contrast and also to pool over opposite contrasts? Aspects of cortical development, grouping, attention, perceptual learning, stereopsis and 3D planar surface perception have previously been analyzed using a 3D LAMINART model of cortical areas VI, V2, and V4. The present work consistently extends this model to show how like-polarity competition between VI simple cells in layer 4 may be combined with other LAMINART grouping mechanisms, such as cooperative pooling of opposite polarities at layer 2/3 complex cells. The model also explains how the Metelli Rules can lead to transparent percepts, how bistable transparency percepts can arise in which either surface can be perceived as transparent, and how such a transparency reversal can be facilitated by an attention shift. The like-polarity inhibition prediction is consistent with lateral masking experiments in which two f1anking Gabor patches with the same contrast polarity as the target increase the target detection threshold when they approach the target. It is also consistent with LAMINART simulations of cortical development. Other model explanations and testable predictions will also be presented.Air Force Office of Naval Research (F49620-01-1-0397); Office of Naval Research (N00014-01-1-0624
Evaluating Tidal Marsh Sustainability in the Face of Sea-Level Rise: A Hybrid Modeling Approach Applied to San Francisco Bay
Tidal marshes will be threatened by increasing rates of sea-level rise (SLR) over the next century. Managers seek guidance on whether existing and restored marshes will be resilient under a range of potential future conditions, and on prioritizing marsh restoration and conservation activities.Building upon established models, we developed a hybrid approach that involves a mechanistic treatment of marsh accretion dynamics and incorporates spatial variation at a scale relevant for conservation and restoration decision-making. We applied this model to San Francisco Bay, using best-available elevation data and estimates of sediment supply and organic matter accumulation developed for 15 Bay subregions. Accretion models were run over 100 years for 70 combinations of starting elevation, mineral sediment, organic matter, and SLR assumptions. Results were applied spatially to evaluate eight Bay-wide climate change scenarios.Model results indicated that under a high rate of SLR (1.65 m/century), short-term restoration of diked subtidal baylands to mid marsh elevations (-0.2 m MHHW) could be achieved over the next century with sediment concentrations greater than 200 mg/L. However, suspended sediment concentrations greater than 300 mg/L would be required for 100-year mid marsh sustainability (i.e., no elevation loss). Organic matter accumulation had minimal impacts on this threshold. Bay-wide projections of marsh habitat area varied substantially, depending primarily on SLR and sediment assumptions. Across all scenarios, however, the model projected a shift in the mix of intertidal habitats, with a loss of high marsh and gains in low marsh and mudflats.Results suggest a bleak prognosis for long-term natural tidal marsh sustainability under a high-SLR scenario. To minimize marsh loss, we recommend conserving adjacent uplands for marsh migration, redistributing dredged sediment to raise elevations, and concentrating restoration efforts in sediment-rich areas. To assist land managers, we developed a web-based decision support tool (www.prbo.org/sfbayslr)
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