Search results for "Networks"
showing 10 items of 3260 documents
The trade-enhancing effect of immigration networks: New evidence on the role of geographic proximity
2012
Abstract We use migration-trade data from Italian, Portuguese and Spanish provinces to examine the importance of geographic proximity in the effectiveness of ethnic networks on bilateral trade. Empirical findings from the gravity model show that the migration-trade link is clearly in-province: exports from a province to a country do not receive any stimuli from immigrants from this country living outside of the province, once we control for country–province time-invariant fixed effects.
Networks in Finance
2010
Design and Implementation of Deep Learning Based Contactless Authentication System Using Hand Gestures
2021
Hand gestures based sign language digits have several contactless applications. Applications include communication for impaired people, such as elderly and disabled people, health-care applications, automotive user interfaces, and security and surveillance. This work presents the design and implementation of a complete end-to-end deep learning based edge computing system that can verify a user contactlessly using &lsquo
De las redes sociales a un conocimiento crítico compartido. La experiencia del Geoforo
2013
La construcción de un conocimiento crítico compartido educativo requiere que se cumplan algunas condiciones. En primer lugar que exista un grupo de personas y colectivos que estén dispuestos a colaborar en debates y argumentos en relación con su profesión docente. También es preciso que la teoría crítica esté definida en relación con las tradiciones e innovaciones didácticas. Pero sobre todo es preciso que se establezca un diálogo entre la teoría y la práctica, en especial en las acciones e intenciones que se desarrollan en el sistema escolar. Este es la finalidad que busca el Geoforo desde hace cinco años.
Efficient Graph Models for Retrieving Top-k News Feeds from Ego Networks
2012
A key challenge of web platforms like social networking sites and services for news feed aggregation is the efficient and targeted distribution of new content items to users. This can be formulated as the problem of retrieving the top-k news items out of the d-degree ego network of each given user, where the set of all users producing feeds is of size n, with n >> d >> k and typically k
Optimal Operating Point Calculation for Medium Voltage Distribution Systems
2007
The paper deals with the calculation of the optimal working point of a distribution system, equipped with several distributed generators, able to operate also autonomously, i.e. disconnected from the main grid. When connected to the main grid, it appears in general convenient to assign the slack bus role to the bus that represents such a connection. The problem becomes more complex when maximum power transfer constraints through the connection must be taken into account. The adequate slack bus treatment is even more important when the optimal operating condition must refer to the condition subsequent to an intentional or unintentional disconnection from the main grid. The paper presents an …
Practical procedure for verification of compliance of digital mobile radio base stations to limitations of exposure of the general public to electrom…
2002
In the last few years, society has witnessed the installation of an ever increasing number of radio base stations as a necessity for handling new capabilities and services to the large number of users. This rapid development of wireless networks, however, has induced a marked mistrustful attitude in people, who fear possible biological effects of electromagnetic emissions from mobile communications base stations. While there are guidelines on the limitation of human exposure to electromagnetic fields (emf ), there is no harmonised standard measurement procedure to evaluate compliance with the limits on exposure in the vicinity of a base station. The measurement procedure has to be practical…
Design and Study of a Wide-Band Printed Circuit Board Near-Field Probe
2021
Magnetic near-field probes (NFP) represent a suitable tool to measure the magnetic field level from a small electromagnetic interference (EMI) source. This kind of antenna is useful as a magnetic field probe for pre-compliance EMC measurements or debugging tasks since the user can scan a printed circuit board (PCB) looking for locations with strong magnetic fields. When a strong H-field point is found, the designer should check the PCB layout and components placement in that area to detect if this could result in an EMI source. This contribution focuses on analyzing the performance of an easy to build and low-cost H-field NFP designed and manufactured using a standard PCB stack-up. Thereby,…
“From Trust to Travel: the Role of Electronic Word of Mouth through Tourist Social Networks”
2013
Experiences from global e-collaboration: Contextual influences on technology adoption and use
2005
The article presents a cross-case comparison of experiences from organizational adoption and use of e-collaboration technologies in two large global companies. Challenges in the global implementation process were found to increase with the organizational and geographical scope of the implementation, level of autonomy in the adoption process, cultural diversity, technological heterogeneity, and level of work process support embedded in the system. Alignment with existing collaborative work practices resulted in faster adoption of the technological solution. Highly competitive conditions restricted the resources available for training and experience transfer between projects. Clients’ prefere…