Search results for "quest"

Work Ability after Breast Cancer: Study of Healthcare Personnel Operating in a Hospital of South Italy

2022

Breast cancer (BrC) treatment can produce disabilities that often impact the quality of daily life and impact the social and working relationships of the patient. This paper looked into the remaining work ability in a group of female healthcare personnel (HCPs) with BrC in Southern Italy. Each HCP was subjected to a medical check, routine blood tests, and a questionnaire on the work ability index (WAI). Of 980 (100%) HCWs undergoing health control, 6% (n = 54) had experienced BRC, and only 66.6% (n = 36) agreed to take part in the study. A total of 28 (78%) were on night shifts. The WAI score was quite low in 5 (13.8%) cases, moderate in 10 (27.7%) cases, good in 14 (38.8%) cases, and excel…

Non invasive diagnosis in a case of bronchopulmobary sequestration and proposal of diagnostic algorithm

2008

Optimization of the Relay Selection Scheme in Cooperative Retransmission Networks

2011

Cooperative MAC protocol design has attracted much attention recently thanks to the development of relaying techniques. In single-relay C-ARQ, the relay selection scheme cannot work efficiently in a dense network, due to high collision probability among different contending relays. In this paper, the throughput performance impairment from the collision is analysed in a typical network scenario. Thereby, we propose an optimized relay selection scheme aiming at maximizing system throughput by reducing collision probability. The throughput performance enhancement by the proposed optimal relay selection scheme is verified by simulations.

On the performance of hybrid-ARQ with code combining over double rayleigh fading channels

2011

In this paper, we study the performance of hybrid automatic repeat request (HARQ) with code combining (CC) over double Rayleigh channels. This channel can be utilized to model the fading envelope of vehicle-to-vehicle (V2V) channels. We derive analytical solutions for the characteristic quantities of double Rayleigh channels, such as the outage probability, the ergodic capacity, and the bit error probability (BEP). Moreover, we study the performance of HARQ with CC. Our analysis focuses on information theoretic aspects of HARQ with CC. closed-form analytical approximations are derived for the e-outage capacity, the average number of transmissions, and the average transmission rate of HARQ w…

An optimal energy efficient cooperative retransmission MAC scheme in wireless networks

2011

While the benefits of cooperative diversity have been well studied in the literature, cooperative MAC protocol design has also attracted much attention recently. In the single-relay Cooperative Automatic Repeat reQuest (C-ARQ) protocol, the best relay node is selected in a distributed manner by relays using different backoff time before packet retransmission. However, this relay selection scheme does not work efficiently in a dense network scenario, due to possible high collision probability among different contending relays. In this paper, we propose an optimized relay selection scheme to maximize system energy efficiency by reducing collision probability. The energy efficiency performance…

Integral functions of marine vertebrates in the ocean carbon cycle and climate change mitigation

2021

Summary In the last decade, the ocean has absorbed a quarter of the Earth’s greenhouse gas emissions through the carbon (C) cycle, a naturally occurring process. Aspects of the ocean C cycle are now being incorporated into climate change mitigation and adaptation plans. Currently, too little is known about marine vertebrate C functions for their inclusion in policies. Fortunately, marine vertebrate biology, behavior, and ecology through the lens of C and nutrient cycling and flux is an emerging area of research that is rich in existing data. This review uses literature and trusted data sources to describe marine vertebrate C interactions, provides quantification where possible, and highligh…

The Silent Board: How Language Diversity May Influence the Work Processes of Corporate Boards

2014

Manuscript Type Empirical. Research Question/Issue Corporate boards often change their working language when they acquire foreign members. Consequently, boards �talk� in one language but �think� in another. The present study explores and explains how language diversity influences work processes of corporate boards. Research Findings/Insights On the basis of a multiple case study of nine multinational corporations (MNCs) from four Nordic countries, we discovered evidence of impoverished and silenced discussions in board meetings in those case companies that were unprepared to switch to English as the new working language of the board. Some board members found it difficult to contribute to bo…

Tensions in Online Communities: The Case of a Mass Size eParticipation Initiative

2017

Part 4: Critical Reflections; International audience; While Online Communities (OCs) are increasingly used to involve people in organizations and societies, few studies focus on how OC influence political decision making within eParticipation initiatives. This issue is explored through an interpretive case-study of the Italian Five Star Movement (M5S), a mass-size eParticipation political initiative recently founded by private citizens. The use of OCs is a common strategy to involve groups of people to easily connect on-line, cooperating on common and shared interests. We here focus on understanding the internal and external forces influencing on the OCs, to better understand how to manage …

A Multi-Relay Cooperative Automatic Repeat Request Protocol in Wireless Networks

2010

This paper proposes a Multi-relay Cooperative Automatic Repeat ReQuest protocol (MC-ARQ) for IEEE 802.11 based wireless networks. The proposed distributed relay selection scheme not only selects the best relays but also solves the collision problem among multiple contending relays, by sorting the relays in the network according to their instantaneous channel quality with the destination node. No prior information or explicit signaling among relay nodes is required. Both analytical and simulation results show that significant benefits can be achieved with the MC-ARQ protocol, compared with both the recently proposed PRCSMA scheme and the original non-cooperative DCF scheme.

Associations between changes in physical fitness and psychological difficulties status among Norwegian adolescents

2021

Abstract Objectives To investigate the associations for one-year changes in cardiorespiratory fitness, muscular strength and body mass index, with psychological difficulties status in adolescents. Methods Norwegian 14-15-year-olds (n = 925) participated in data collection at two time points separated by one year. Psychological difficulties were assessed via the Strengths and Difficulties questionnaire and data from follow-up serve as the dependent variable. Cardiorespiratory fitness (the Andersen-test), muscular strength (Eurofit) and body mass index were measured. Change scores were calculated from the physical fitness variables and serve as independent variables in linear mixed effects mo…