Search results for " Complexity"
showing 10 items of 623 documents
“Te das cuenta de que el mundo puede ser tan distinto y similar al mismo tiempo”: Telecolaboración y desarrollo de la competencia intercultural en la…
2016
Este artículo versa sobre la integración de la telecolaboración, o intercambio intercultural en línea, en contextos de educación superior, para el desarrollo de la competencia intercultural en el aula inglés como lengua extranjera. Se analiza, desde la perspectiva de los estudiantes, un intercambio de telecolaboración en que participantes de España y de Estados Unidos colaboraron en grupos interculturales y plurinacionales para llevar a cabo una serie de tareas cuya complejidad cognitiva iba progresivamente en aumento: creación de un perfil digital, grabación de un vídeo de presentación, interacción multimodal (texto, audio, videoconferencia) para discutir y debatir los diferentes temas pro…
Interactions of pharmaceutical companies with world countries, cancers and rare diseases from Wikipedia network analysis
2019
AbstractUsing the English Wikipedia network of more than 5 million articles we analyze interactions and interlinks between the 34 largest pharmaceutical companies, 195 world countries, 47 rare renal diseases and 37 types of cancer. The recently developed algorithm using a reduced Google matrix (REGOMAX) allows us to take account both of direct Markov transitions between these articles and also of indirect transitions generated by the pathways between them via the global Wikipedia network. This approach therefore provides a compact description of interactions between these articles that allows us to determine the friendship networks between them, as well as the PageRank sensitivity of countr…
Cooperative Inventory control
2005
In multi-retailer inventory control the possibility of sharing setup costs motivates communication and coordination among the retailers. We solve the problem of finding suboptimal distributed reordering policies that minimize setup, ordering, storage, and shortage costs incurred by the retailers over a finite horizon. Neuro-dynamic programming (NDP) reduces the computational complexity of the solution algorithm from exponential to polynomial on the number of retailers.
Solving NP-Complete Problems with Networks of Evolutionary Processors
2001
We propose a computational device based on evolutionary rules and communication within a network, similar to that introduced in [4], called network of evolutionary processors. An NP-complete problem is solved by networks of evolutionary processors of linear size in linear time. Some furher directions of research are finally discussed.
Using methods and IT tools innovatively for the management of International IS development projects
2008
Increasingly, information systems (IS) development is done internationally. International IS development is very complex. Some of the factors that lead to this high complexity include geographically dispersed teams, time-zone differences, cultural differences, language problem, and communication challenges. All these affect coordination and collaboration significantly. Therefore, the project management activities have to be executed via different methods and information technology (IT) tools. There is a significant lack of studies dealing with the management of international IS development using methods and IT tools innovatively. Therefore, this study has been undertaken to fill in this res…
Introduction to the JOTSC Special Issue on Leveraging Organizational Change and Knowledge Management to Address Environmental Complexity
2016
Claims that organizations are living through a period of unprecedented complexity are not new. Accordingly, scholars and practitioners are recognizing the challenges that originate from operating in increasingly complex and interconnected environments. Despite the relevant theoretical advances occurred in organizational and management studies as a consequence of such recognition, a full appreciation of how organizations deal with complex situations is still missing (Amagoh, 2008; Axeldrod & Cohen, 2000). Accordingly, this special issue aims to contribute to elucidate how organizations respond to environmental complexity through the activation of specific processes of organizational change a…
Teams and project performance: an ability, motivation, and opportunity approach
2020
This article analyzes the relationships between project performance and the team’s ability, motivation, and opportunity (AMO). We contribute to the project management literature by exploring which combinations of AMO factors are best for project performance at different levels of complexity. We test our hypotheses on a sample of 285 projects. Our study shows that in simple projects, ability is the key factor both as a main effect and as a constraining factor that acts as a bottleneck for project performance. In the case of complex projects, the multiplicative model is superior given the significant interaction effects of motivation.
Comparison of genomic sequences clustering using Normalized Compression Distance and Evolutionary Distance
2008
Genomic sequences are usually compared using evolutionary distance, a procedure that implies the alignment of the sequences. Alignment of long sequences is a long procedure and the obtained dissimilarity results is not a metric. Recently the normalized compression distance was introduced as a method to calculate the distance between two generic digital objects, and it seems a suitable way to compare genomic strings. In this paper the clustering and the mapping, obtained using a SOM, with the traditional evolutionary distance and the compression distance are compared in order to understand if the two distances sets are similar. The first results indicate that the two distances catch differen…
Introduction: The Late Chalcolithic of Northern Mesopotamia in Context. Building on a Long and Eventful Debate
2022
Many of the debates that have until recently driven research into Mesopotamia’s proto-urban phase (5th– 4th millennia BCE) have now been reassessed thanks to new fieldwork in Iraqi Kurdistan and new data into the relationships between the north and south of the Alluvium from hitherto poorly-documented regions. These debates were re-examined in the light of this new material during a workshop held at the ICAANE in 2018 in Munich, leading to unprecedented perspectives on the patterns of early urbanization, social mobility, and the organization of Late Chalcolithic communities. Drawing on research first presented at ICAANE, and building on the most recent data from surveys and excavations, thi…
Image boundaries detection: from thresholding to implicit curve evolution
2014
The development of high dimensional large-scale imaging devices increases the need of fast, robust and accurate image segmentation methods. Due to its intrinsic advantages such as the ability to extract complex boundaries, while handling topological changes automatically, the level set method (LSM) has been widely used in boundaries detection. Nevertheless, their computational complexity limits their use for real time systems. Furthermore, most of the LSMs share the limit of leading very often to a local minimum, while the effectiveness of many computer vision applications depends on the whole image boundaries. In this paper, using the image thresholding and the implicit curve evolution fra…