Creation of Representative Gas Distribution Networks for Multi-vector Energy System Studies

The recent evolution of the electrical systems has seen the introduction of large shares of renewable energy sources connected to the electrical distribution networks, and the coupling of the electricity and gas distribution systems. The exploitation of power-to-gas technologies enables stronger coupling between the electricity and gas networks. However, a limiting factor is that the gas quality should be maintained. This paper introduces a procedure to create a representative natural gas network based on a predefined electrical system topology. Furthermore, by using a detailed gas system model, the paper addresses the suitability of the coupling between gas and electrical systems through the power-to-gas technology, in terms of gas quality targets

Decision-Making for Maritime Networks: Evaluating Corporate and Social Profitability of an Integrated Short Sea Shipping Network in the Upper Tyrrhenian Sea

This study applies cost benefit analysis (CBA) approaches to evaluate corporate and social profitability of a coordinated management proposal for a Short Sea Shipping (SSS) network in the upper Tyrrhenian area. The profitability of the maritime network is assessed first for the shipping companies operating therein and then for society as a whole. Corporate profitability analysis reveals a supply system currently over-sized compared to actual demand. The reasons for this must be found in the corporate competition strategies that traditionally characterize the free maritime transport market in the area. Social profitability analysis proves the potential positive impact of services rescheduling and coordination in terms of time savings and emission reduction in port areas and demonstrates the benefits new integrated management policies could yield for achieving higher efficiency and sustainability in SSS Tyrrhenian networks

Driving pro-environmental change in tourist destinations: encouraging sustainable travel in National Parks via partnership project creation and implementation

© 2016 Taylor & Francis. This paper explores a key challenge in introducing more sustainable transport practices at destinations: achieving modal shift in visitor travel from cars to physically active or public transport to reduce tourism's environmental impacts. It centres on using partnership led projects bringing together the many public and private sector organisations involved, to drive destination change and development. To date, research has centred on pro-environmental change for individuals and individual organisations: little is known about the mechanisms of pro-environmental change via complex multi-partner organisations. The paper reports research into the processes involved in successful projects to provide alternatives to car travel in three UK National Parks by using partnerships to obtain funding and implement change. Based on case studies informed by in-depth interviews with key stakeholders involved in pro-environmental change implementation, narratives are analysed to explain the change process, and mapped against existing literature and theories of change. Conclusions show the role of inspired individuals, supportive senior management, strong governance, better visitor experiences and, most significantly, communication and communication of the benefits of change to stakeholders. The research suggests why and how change occurs in partnerships, contributes to better theories of change and offers guidance on understanding and implementing change processes worldwide

Using system dynamics for collaborative design: a case study

<p>Abstract</p> <p>Background</p> <p>In order to facilitate the collaborative design, system dynamics (SD) with a group modelling approach was used in the early stages of planning a new stroke unit. During six workshops a SD model was created in a multiprofessional group.</p> <p>Aim</p> <p>To explore to which extent and how the use of system dynamics contributed to the collaborative design process.</p> <p>Method</p> <p>A case study was conducted using several data sources.</p> <p>Results</p> <p>SD supported a collaborative design, by facilitating an explicit description of stroke care process, a dialogue and a joint understanding. The construction of the model obliged the group to conceptualise the stroke care and experimentation with the model gave the opportunity to reflect on care.</p> <p>Conclusion</p> <p>SD facilitated the collaborative design process and should be integrated in the early stages of the design process as a quality improvement tool.</p

Investigating the Willingness to Pay for a Contributory National Health Insurance Scheme in Saudi Arabia:A Cross-sectional Stated Preference Approach

Background: The Saudi Healthcare System is universal, financed entirely from government revenue principally derived from oil, and is ‘free at the point of delivery’ (non-contributory). However, this system is unlikely to be sustainable in the medium to long term. This study investigates the feasibility and acceptability of healthcare financing reform by examining households’ willingness to pay (WTP) for a contributory national health insurance scheme. Methods: Using the contingent valuation method, a pre-tested interviewer-administered questionnaire was used to collect data from 1187 heads of household in Jeddah province over a 5-month period. Multi-stage sampling was employed to select the study sample. Using a double-bounded dichotomous choice with the follow-up elicitation method, respondents were asked to state their WTP for a hypothetical contributory national health insurance scheme. Tobit regression analysis was used to examine the factors associated with WTP and assess the construct validity of elicited WTP. Results: Over two-thirds (69.6%) indicated that they were willing to participate in and pay for a contributory national health insurance scheme. The mean WTP was 50 Saudi Riyal (US$13.33) per household member per month. Tobit regression analysis showed that household size, satisfaction with the quality of public healthcare services, perceptions about financing healthcare, education and income were the main determinants of WTP. Conclusions: This study demonstrates a theoretically valid WTP for a contributory national health insurance scheme by Saudi people. The research shows that willingness to participate in and pay for a contributory national health insurance scheme depends on participant characteristics. Identifying and understanding the main influencing factors associated with WTP are important to help facilitate establishing and implementing the national health insurance scheme. The results could assist policy-makers to develop and set insurance premiums, thus providing an additional source of healthcare financing