Connecting the Edges: A Universal, Mobile-Centric, and Opportunistic Communications Architecture

The Internet has crossed new frontiers with access to it getting faster and cheaper. Considering that the architectural foundations of today's Internet were laid more than three decades ago, the Internet has done remarkably well until today coping with the growing demand. However, the future Internet architecture is expected to support not only the ever growing number of users and devices, but also a diverse set of new applications and services. Departing from the traditional host-centric access paradigm, where access to a desired content is mapped to its location, an information-centric model enables the association of access to a desired content with the content itself, irrespective of the location where it is being held. UMOBILE tailors the information-centric communication model to meet the requirements of opportunistic communications, integrating those connectivity approaches into a single architecture. By pushing services near the edge of the network, such an architecture can pervasively operate in any networking environment and allows for the development of innovative applications, providing access to data independent of the level of end-to-end connectivity availability

Channeling of protons in various types of radially compressed carbon nanotubes

Channeling of 10 MeV protons in various types of radially compressed chiral carbon nanotubes is considered. Monte Carlo simulation program is used for the calculation of the trajectories, energy losses and angular distributions of protons in nanotubes of various lengths, where the potential in Doyle-Turner approximation is used to describe the interaction between a proton and a nanotube. Carbon nanotubes, which are considered, are radially compressed at the centre or at both ends. The results show that in some cases a decreased angular distribution of the beam is observed, compared with propagation through a straight nanotube. Furthermore, the energy distribution of channeled protons in nanotubes present a series of small peaks besides a main one, the number of which depends on the nanotube length and the angle of incidence, which in some cases are significantly high. © 2015 Elsevier B.V. All rights reserved

Channeling of protons in radially compressed chiral carbon nanotubes

Channeling of 10 MeV protons in various types of point and area radially compressed chiral carbon nanotubes (CNTs) is considered. Monte Carlo simulation program is used for the calculation of the trajectories, energy losses and angular distributions of protons in (6,4) and (11,9) CNTs of 2000 nm length, where the potential in Doyle-Turner approximation is used to describe the interaction between a proton and a nanotube. Carbon nanotubes, which are considered, are radially compressed at two points (500 nm and 1500 nm each), at a middle area of various lengths, at three points (both ends and at the centre) and at both ends with a middle area remaining uncompressed. The results show that in a specific case of compressed nanotube a decreased angular distribution of the beam is observed, compared even with propagation in a straight uncompressed nanotube. Furthermore, the energy distribution of channeled protons depends on the type of compression. © 2017 Elsevier B.V

Role Stress and Satisfication of Academic Department Heads

The role of the academic department head in Australian universities has been little explored. This study explores the role more comprehensively by comparing key demographic data with a similar American-based study, and examining the role in terms of job satisfaction, role conflict, and role ambiguity. Findings indicate a job where role stress is significantly associated with chair stress, and negatively associated with job satisfaction and demographic variables. A structural equations model with cross-validation on a split sample indicates the direct effects of role conflict and role ambiguity on chair stress and job satisfaction. Discussions of the findings in terms of the extant research indicate areas in need of further examination

A Neo-marxist Study of Organizational Leadership

This study examines the extent to which a leader's behavior (i.e., transactional and transformational styles) and aspects of an organisation's structure (i.e., centralization, formalization dimensions) directly and/or indirectly relate to neo-Marxist elements of work alienation (i.e., powerlessness, meaninglessness, self estrangement). The study utilized confirmatory structural modeling techniques to estimate the goodness of fit of transformational/transactional leadership-structure-alienation models based on the responses of personnel in a major US eastern seaboard fire department (a bureaucratic, quasi-military type organisation) (n = 326). Goodness of fit statistics for the transformational leadership structural model indicated good fit to the observed data, whereas transactional leadership showed poor fit. For both models, centralization (i.e., hierarchy of authority) and formalization (i.e., job codification, job specificity) sub-constructs predicted increased and decreased feelings of worker alienation (i.e., powerlessness) respectively. Additionally, transformational (attributed charisma) and transactional (contingent reward) leadership sub-constructs exerted significant direct and indirect negative effects on work alienation. The study argues that managers as well as leaders need to question bureaucratic orientations to work and manager-employee relations by rethinking their value orientations and adapting new models that encourage individual fulfilment, learning, and personal development

Work alienation and organizational leadership

This study examines the extent to which a leader's behaviour (i.e. transactional and transformational styles) and aspects of an organization's structure (i.e. centralization, formalization dimensions) directly and/or indirectly relate to elements of wor