Probabilistic Routing Protocol for Intermittently Connected Networks

This document is a product of the Delay Tolerant Networking Research Group and has been reviewed by that group. No objections to its publication as an RFC were raised. This document defines PRoPHET, a Probabilistic Routing Protocol using History of Encounters and Transitivity. PRoPHET is a variant of the epidemic routing protocol for intermittently connected networks that operates by pruning the epidemic distribution tree to minimize resource usage while still attempting to achieve the best-case routing capabilities of epidemic routing. It is intended for use in sparse mesh networks where there is no guarantee that a fully connected path between the source and destination exists at any time, rendering traditional routing protocols unable to deliver messages between hosts. These networks are examples of networks where there is a disparity between the latency requirements of applications and the capabilities of the underlying network (networks often referred to as delay and disruption tolerant). The document presents an architectural overview followed by the protocol specification

The Evolution of a DTN Routing Protocol - PRoPHETv2

Research within Delay- and Disruption Tolerant Networks (DTN) has evolved into a mature research area. PRoPHET is a routing protocol for DTNs that was developed when DTN research was in its infancy and which has been studied by many. In this paper we investigate how the protocol can evolve to meet new challenges that has been identified through research and practical experience. We propose some minor modifications to the routing metric cal- culations done in PRoPHET which has potential to alleviate some issues and improve the performance of the protocol. Using these modifications, we define an updated version of the protocol called PRoPHETv2. We run simulations to verify the operation of the protocol and compare its performance against the original version of the protocol as well as some other routing protocols. The evalua- tions are done using both traces from an existing DTN deployment and a synthetic mobility model. Since the basic mechanisms of the protocol remain the same, migrating existing implementations to the new version of PRoPHET is possible with limited effort

Pledging, Praising and Shaming: Experimental Labour Markets in Ghana

Firm surveys have shown that labour management in developing countries is often problematic. Earlier experimental research (Davies & Fafchamps, 2017) has shown that managers in Ghana are reluctant to use monetary incentives to motivate workers. This paper presents the results from a gift-exchange game experiment in Ghana in which the worker can make a promise to the employer before a contract is offered (ex ante communication) and in which the employer can send negative or positive feedback to the worker after the worker has chosen effort (ex post communication). The results indicate that feedback can help sustain cooperate behaviour (high effort provision), but only if the wage offered is high enough. Feedback reinforces reciprocity concerns on the behalf of the worker. In particular positive messages (praising) leads to higher effort provision, no significant relation between negative feedback and effort can be found. Promises are related to higher effort, but do not necessarily lead to higher wages

Identifying future models for delivering genetic services: a nominal group study in primary care

BACKGROUND: To enable primary care medical practitioners to generate a range of possible service delivery models for genetic counselling services and critically assess their suitability. METHODS: Modified nominal group technique using in primary care professional development workshops. RESULTS: 37 general practitioners in Wales, United Kingdom too part in the nominal group process. The practitioners who attended did not believe current systems were sufficient to meet anticipated demand for genetic services. A wide range of different service models was proposed, although no single option emerged as a clear preference. No argument was put forward for genetic assessment and counselling being central to family practice, neither was there a voice for the view that the family doctor should become skilled at advising patients about predictive genetic testing and be able to counsel patients about the wider implications of genetic testing for patients and their family members, even for areas such as common cancers. Nevertheless, all the preferred models put a high priority on providing the service in the community, and often co-located in primary care, by clinicians who had developed expertise. CONCLUSION: There is a need for a wider debate about how healthcare systems address individual concerns about genetic concerns and risk, especially given the increasing commercial marketing of genetic tests

Unmeasured improvement work: the lack of routinely collected, service-related data in NHS endoscopy units in England involved in "modernisation"

Contains fulltext : 70532.pdf (publisher's version ) (Open Access)BACKGROUND: The availability of routinely collected service-related endoscopy data from NHS endoscopy units has never been quantified. METHODS: This retrospective observational study asked 19 endoscopy units to submit copies of all in-house, service-related endoscopy data that had been routinely collected by the unit - Referral numbers, Activity, Number of patients waiting and Number of lost slots. Nine of the endoscopy units had previously participated in the Modernising Endoscopy Services (MES) project during 2003 to redesign their endoscopy services. These MES sites had access to additional funding and data collection software. The other ten (Control sites) had modernised independently. All data was requested in two phases and corresponded to eight specific time points between January 2003 and April 2006. RESULTS: Only eight of 19 endoscopy units submitted routinely collected, service-related data. Another site's data was collected specifically for the study. A further two units claimed to routinely collect service-related data but did not submit any to the study. The remaining eight did not collect any service-related endoscopy data routinely and liaised with their Trust for data. Of the eight sites submitting service-related data, only three were MES project sites. Of these three, the data variables collected were limited and none collected the complete set of endoscopy data variables requested. Of the other five sites, two collected all four endoscopy data types. Data for the three MES project sites went back as far as January 2003, whilst the five Control sites were only able to submit data from December 2003 onwards. CONCLUSION: There was a lack of service-related endoscopy data routinely collected by the study sites, especially those who had participated in the MES project. Without this data, NHS endoscopy services cannot have a true understanding of their services, cannot identify problems and cannot measure the impact of any changes. With the increasing pressures placed on NHS endoscopy services, the need to effectively inform redesign plans is paramount. We recommend the compulsory collection of service-related endoscopy data by all NHS endoscopy units using a standardised format with rigorous guidelines

Improving the delivery of care for patients with diabetes through understanding optimised team work and organisation in primary care

Peer reviewedPublisher PD

Using creative co-design to develop a decision support tool for people with malignant pleural effusion

Abstract: Background: Malignant pleural effusion (MPE) is a common, serious problem predominantly seen in metastatic lung and breast cancer and malignant pleural mesothelioma. Recurrence of malignant pleural effusion is common, and symptoms significantly impair people’s daily lives. Numerous treatment options exist, yet choosing the most suitable depends on many factors and making decisions can be challenging in pressured, time-sensitive clinical environments. Clinicians identified a need to develop a decision support tool. This paper reports the process of co-producing an initial prototype tool. Methods: Creative co-design methods were used. Three pleural teams from three disparate clinical sites in the UK were involved. To overcome the geographical distance between sites and the ill-health of service users, novel distributed methods of creative co-design were used. Local workshops were designed and structured, including video clips of activities. These were run on each site with clinicians, patients and carers. A joint national workshop was then conducted with representatives from all stakeholder groups to consider the findings and outputs from local meetings. The design team worked with participants to develop outputs, including patient timelines and personas. These were used as the basis to develop and test prototype ideas. Results: Key messages from the workshops informed prototype development. These messages were as follows. Understanding and managing the pleural effusion was the priority for patients, not their overall cancer journey. Preferred methods for receiving information were varied but visual and graphic approaches were favoured. The main influences on people’s decisions about their MPE treatment were personal aspects of their lives, for example, how active they are, what support they have at home. The findings informed the development of a first prototype/service visualisation (a video representing a web-based support tool) to help people identify personal priorities and to guide shared treatment decisions. Conclusion: The creative design methods and distributed model used in this project overcame many of the barriers to traditional co-production methods such as power, language and time. They allowed specialist pleural teams and service users to work together to create a patient-facing decision support tool owned by those who will use it and ready for implementation and evaluation

Talking about my experiences ... at times disturbing yet positive': Producing narratives with people living with dementia

Background: This research investigated narrative production and use with families living with dementia. We hypothesised that the process of narrative production would be beneficial to people with dementia and carers, and would elicit important learning for health and social care professionals. Method: Through third sector partners, we recruited community-dwelling people with dementia and carers who consented to develop written, audiotaped or videotaped narratives. Audio-taped narratives were transcribed verbatim and handwritten narratives word-processed. After checking by participants, completed narratives were analysed thematically using qualitative data analysis computer software. A summary of the analysis was circulated to participants, inviting feedback: the analysis was then reviewed. A feedback questionnaire was subsequently circulated to participants, and responses were analysed thematically. Results: Twenty-one carers and 20 people with dementia participated in the project. Four themes of support were identified: ‘relationships’, ‘services’, ‘prior experience of coping’ and having an ‘explanation for the dementia’. Three themes were identified as possible additional stresses: ‘emotions’, ‘physical health’ and ‘identity’. We suggest a model incorporating all these themes, which appeared to contribute to three further themes; ‘experience of dementia’, ‘approaches to coping’ and ‘looking to the future’. In participant feedback, the main themes identified were ‘emotions’, ‘putting things in perspective’, ‘sharing or not sharing the narrative’ and ‘actions resulting’. Conclusions: Producing a narrative is a valuable and engaging experience for people with dementia and carers, and is likely to contribute to the quality of dementia care.Further research is needed to establish how narrative production could be incorporated into routine practice

SLTs’ conceptions about their own and parents’ roles during intervention with preschool children

© 2019 Royal College of Speech and Language Therapists Background: Current research investigating collaboration between parents and speech and language therapists (SLTs) indicates that the SLT role is characterized by therapist-led practice. Co-working with parents of children with speech and language difficulties is less frequently described. In order to embrace co-working during intervention, the SLT role may need to be reframed, focusing on acquiring skills in the role of coach as well as the role of planning intervention and treating children. Aims: To report (1) SLTs’ conceptions about their own roles during intervention for pre-school children with speech and language difficulties; and (2) SLTs’ conceptions of parents’ roles during intervention. Methods & Procedures: A qualitative study used individual, semi-structured interviews with 12 SLTs working with pre-school children. Open-ended questions investigated SLTs’ expectation of parents, experience of working with families, and the SLTs’ conception of their roles during assessment, intervention and decision-making. Thematic network analysis was used to identify basic, organizational and global themes. Results & Outcomes: SLTs had three conceptions about their own role during intervention: treating, planning and coaching. The roles of treating and planning were clearly formulated, but the conception of their role as coach was more implicit in their discourse. SLTs’ conception of parents’ roles focused on parents as implementers of activities and only occasionally as change agents. Conclusions & Implications: Collaboration that reflects co-working may necessitate changes in the conception about the role for both SLTs and parents. SLTs and parents may need to negotiate roles, with parents assuming learner and adaptor roles and SLTs adopting a coaching role to activate greater involvement of parents. Applying conceptual change theory offers new possibilities for understanding and enabling changes in SLTs’ conception of roles, potentially initiating a deeper understanding of how to achieve co-working during speech and language intervention