Recovery fairness and congestion control mechanisms in RPR networks

The paper describes fundamental features of RPR (Resilient Packet Ring - IEEE 802.17 standard). It focuses on proposals how to improve fairness mechanism and to increase network efficiency in state of congestion. Recovery mechanisms are also discussed, with presented analytical and simulation results. The goals of paper are threefold. At first, we show RPR main features and describe its current status. Secondly, we present main recovery and resilience features of RPR and propose solutions for improving both fairness and congestion control. Finally, a new concept, the enhanced hold-off timer (EHOT) is introduced improving recovery actions in multilayer networks. Some simulation results are presented in order to illustrate advantages of proposed solution.Postprint (published version

p-Cycle configuration possibilities over DRDA networks

A resilience analysis of protection cycles (p-cycle) configurations for Double Rings with Dual Attachment (DRDAs) architectures is presented in this work. DRDAs are composed of two rings with corresponding nodes connected by two separated links. There are several possible configurations of p-cycles, which may be used in DRDAs for improving link or node protection upon link failure. The values of the parameters Mean Time To Failure and Mean Time To Disconnection are analysed in the paper to show the best choice of p-cycles in DRDAs architectures.This work was performed under contract 11.11.230.018

Youth and the Sociability of "Vaping"

This article examines the contemporary and evolving social ritual of vaping (also known as the use and consumption of e-cigarettes). This novel research finds a typology of users in a heterogeneous youth market and shows how the introduction of this new practice challenges existing ritual boundaries. Previous research has focused on the de-marketing of tobacco and smoking cessation. Here, Virtuous, Dynamic, Vulnerable and Invisible Vapers are identified with each demonstrating differing levels of emotional engagement and characteristics of vaping behaviors. Utilizing Collins’ theory of interaction rituals as a lens, this qualitative study explores the sociability of vaping practices to gain a deeper understanding of the enduring appeal of vaping and the subsequent consequences for youth ‘smoking’ behaviors. While some vapers advocate the health benefits of this relatively new practice, the use of e-cigarettes is also used as a form of resistance as well as mechanism for misbehavior

Evaluating the Effectiveness of an Autism-Specific Workplace Tool for Employers: A Randomised Controlled Trial

A randomised controlled trial evaluated the effectiveness of the Integrated Employment Success Tool (IEST™) in improving employers’ self-efficacy in modifying the workplace for individuals on the autism spectrum. Employers (N = 84) were randomised to the IEST™ or support as usual groups. Measurements of self-efficacy, knowledge and attitudes towards disability in the workplace were obtained at baseline and post-test. Results revealed a significant improvement in self-efficacy within the IEST™ group between baseline and post-test (p = 0.016). At post-test, there were no significant differences between groups in relation to self-efficacy in implementing autism-specific workplace modifications and employer attitudes towards disability in the workplace. Given the lack of significant outcomes, further research is needed to determine the effectiveness of the IEST™ for employers

Wpływ zakwaszenia gleby użytkowanej sadowniczo na jej aktywność biochemiczną

The research was carried out in the years 1994 - 1995 in the apple orchard, growing on brown earth, of a grey-brown type (Orthic Luvisol), derived from silt formations, non-uniform on chalk marl. The orchard has been the object of fertilizing experiments of the Fruit-Growing Department of the Academy of Agriculture in Lublin. The following objects were selected for the analysis: AH - fertilization with the dose of 525 kg of NPK ha⁻¹, herbicide fallow strip; AM - fertilization with the dose of 525 kg of NPK ha⁻¹; KH - control, without mineral fertilization, herbicide fallow strip; KM - control, without mineral fertilization, grass strip. High mineral fertilization increased the acidification of soil in comparison to non-fertilized plots. The highest decrease in pH was noted at the fertilization onto herbicide fallow strips. The highest decrease in soil pH resulted in the strong depression of the biochemical activity i. e. dyhydrogenases. phosphatases and urease activities of the soil in that combination