نتایج جستجو برای: in geographical

تعداد نتایج: 16981196  

2010
Christian Helmers

This paper investigates the effect of market entry of new firms on incumbent firms’ innovative activity measured as patent applications. The basic assumption is that the effect of entry varies by geographical distance between entrants and incumbents due to the presence of localized unobserved spillovers. In order to avoid endogeneity problems commonly associated with the timing of entry and ent...

1999
M. C. J. Caniëls B. Verspagen

This paper analyses the effect of locally bounded knowledge spillovers on regional differences in growth. A model will be developed that allows spillovers to take place across regions. Certain conditions determine the amount of spillovers a region receives. By use of simulations (with randomised parameter constellations), it is possible to examine the general behaviour of the model. It is found...

Journal: :J. Computer-Mediated Communication 2008
Amy Janan Johnson Michel M. Haigh Jennifer A. H. Becker Elizabeth A. Craig Shelley Wigley

This study examines how email is utilized to enact maintenance behaviors in interpersonal relationships and explores whether geographic distance between individuals affects this process. Two hundred twenty-six college students accumulated personal email messages over a one-week period. These emails were coded using Canary and Stafford’s (1994) maintenance strategy topology. Results indicate tha...

2004
M. J. Genner M. I. Taylor D. F. R. Cleary S. J. Hawkins M. E. Knight G. F. Turner

The rock-restricted cichlid fish assemblages of Lake Malawi exhibit high spatial diversity in their species composition and relative abundance. However the extent to which this is due to the effects of local environmental differences, dispersal limitation of constituent taxa, and the assignment of allopatric populations to species is uncertain. We examined the factors associated with diversity ...

Journal: :CoRR 2017
Stanislav Sobolevsky

Our recent paper [Grauwin et al. Sci. Rep. 7 (2017)] demonstrates that community and hierarchical structure of the networks of human interactions largely determines the least and should be taken into account while modeling them. In the present proof-of-concept pre-print the opposite question is considered: could the hierarchical structure itself be inferred to be best aligned with the network m...

Journal: :J. Informetrics 2012
Bing He Ying Ding Erjia Yan

The author order of multi-authored papers can reveal subtle patterns of scientific collaboration and provide insights on the nature of credit assignment among coauthors. This article proposes a sequencebased perspective on scientific collaboration. Using frequently occurring sequences as the unit of analysis, this study explores (1) what types of sequence patterns are most common in the scienti...

Journal: :Int. Arab J. Inf. Technol. 2017
Areej Al-Zaidi Rizwan Qureshi

Global Software Development (GSD) is a major direction in software engineering. There is interest in applying scrum practices in distributed projects. Project stakeholder distribution in GSD is represented by geographical distance, which generates challenges for communication. This paper is written to evaluate the effect of scrum practices in mitigating geographical distance-based communication...

Journal: :LLC 2013
Martijn Wieling Robert G. Shackleton John Nerbonne

This study explores the linguistic application of bipartite spectral graph partitioning, a graphtheoretic technique that simultaneously identifies clusters of similar localities as well as clusters of features characteristic of those localities. We compare the results using this approach to previously published results on the same dataset using cluster and principal component analysis (Shacklet...

Journal: :IEICE Transactions 2013
Ping Wang Lin Zhang Victor O. K. Li

In classical routing protocols, geographical distances/locations are typically used as the metric to select the best route, under the assumption that shorter distances exhibit lower energy consumption and nodes within the communication range of the sender can receive packets with a certain success probability. However, in underwater acoustic sensor networks (UASNs), sound propagation in the oce...

2008
Markus Wolf Stephanie Bauer

Psychotherapy and psychosocial interventions rely mainly on verbal communication and language. With the expanding use of computers as well as the capacity of the Internet to bridge geographic distances and to increase access, computer mediated communication (CMC) plays an increasing role for the delivery of psychosocial interventions. This chapter focuses on the advantages and limitations of CM...

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