Maximising revenue for non-firm distributed wind generation with energy storage in an active management scheme

The connection of high penetrations of renewable generation such as wind to distribution networks requires new active management techniques. Curtailing distributed generation during periods of network congestion allows for a higher penetration of distributed wind to connect, however, it reduces the potential revenue from these wind turbines. Energy storage can be used to alleviate this and the store can also be used to carry out other tasks such as trading on an electricity spot market, a mode of operation known as arbitrage. The combination of available revenue streams is crucial in the financial viability of energy storage. This study presents a heuristic algorithm for the optimisation of revenue generated by an energy storage unit working with two revenue streams: generation-curtailment reduction and arbitrage. The algorithm is used to demonstrate the ability of storage to generate revenue and to reduce generation curtailment for two case study networks. Studies carried out include a single wind farm and multiple wind farms connected under a 'last-in-first-out' principle of access. The results clearly show that storage using both operating modes increases revenue over either mode individually. Moreover, energy storage is shown to be effective at reducing curtailment while increasing the utilisation of circuits linking the distribution and transmission networks. Finally, renewable subsidies are considered as a potential third revenue stream. It is interesting to note that under current market agreements such subsidies have the potential to perversely encourage the installation of inefficient storage technologies, because of increased losses facilitating greater "utilisation" of renewable generation

Housing Needs of Ageing Veterans Who Have Experienced Limb Loss

Military veterans can experience limb loss as a direct result of conflict, an accident, illness or injury. Whatever the cause, there is a need to recognise the long-term consequences and challenges of limb loss on maintaining independence in one’s home. This study aimed to examine the housing needs of veterans experiencing limb loss, and the impact of limb loss on housing needs and home adaptations of ageing military veterans. Thirty-two military veterans (aged 43–95) participated in this study and up to three life-story interviews were carried out with each participant. Two themes were generated: availability of support and changing housing needs. It is evident from the findings that military veterans are unique in various ways, specifically due to military culture, geographical relocation and the additional support that is available to the Armed Forces Community. This must be considered in long-term support to maintain independence in the home

Moderate exercise increases affinity of large very low density lipoproteins for hydrolysis by lipoprotein lipase

Context: Postprandial triglyceride (TG) concentration is independently associated with cardiovascular disease risk. Exercise reduces postprandial TG concentrations but the mechanisms responsible are unclear. Objective: To determine the effects of exercise on affinity of chylomicrons, large very low density lipoproteins (VLDL1) and smaller VLDL (VLDL2) for lipoprotein lipase (LPL) mediated TG hydrolysis. Design: Within-participant cross-over study. Setting: A University metabolic investigation unit. Participants: Ten overweight/obese men. Interventions: Participants undertook two oral fat tolerance tests, separated by 7–14 days, in which they had blood taken fasting and for 4 hours after a high-fat mixed meal. On the afternoon before one test, they performed a 90-minute treadmill walk at 50% maximal oxygen uptake (EX); no exercise was performed before the control test (CON). Main outcome measures: Circulating TG-rich lipoprotein concentrations; affinity of chylomicrons, VLDL1, VLDL2 for LPL-mediated TG hydrolysis. Results: Exercise significantly reduced fasting VLDL1-TG concentration (CON: 0.49(0.33–0.72) mmol.l−1, EX: 0.36(0.22–0.59) mmol.l−1, [geometric means (95% confidence interval)]; p=0.04). Time-averaged postprandial chylomicron-TG (CON: 0.55±0.10 mmol.l−1, EX: 0.39±0.08 mmol.l−1, [mean±SEM], p=0.03) and VLDL1-TG (CON: 0.85±0.13 mmol.l−1, EX: 0.66±0.10 mmol.l−1, p=0.01) concentrations were both lower in EX than CON. Affinity of VLDL1 for LPL-mediated TG hydrolysis increased by 2.2(1.3–3.7) fold (geometric mean (95% confidence interval)) (p=0.02) in the fasted state and 2.6(1.8–2.6) fold (p=0.001) postprandially. Affinity of chylomicrons and VLDL2 was not significantly different between trials. Conclusions: Exercise increases affinity of VLDL1 for LPL-mediated TG hydrolysis both fasting and postprandially. This mechanism is likely to contribute to exercise's TG-lowering effect

Postcard: I\u27m on the Hike to the Barbecue at Carlton, Kansas

This black and white printed postcard features an illustration of a man walking along railroad tracks towards a town. Text is printed on the top right of the card. Handwriting is on the bottom and back of the card.https://scholars.fhsu.edu/tj_postcards/1543/thumbnail.jp

A Summary of the Development of a Nominal Land Landing Airbag Impact Attenuation System for the Orion Crew Module

Airborne Systems North America (formally Irvin Aerospace Inc) has developed an Airbag Landing System for the Orion Crew Module of the Crew Exploration Vehicle. This work is in support of the NASA Langley Research Center Landing System Advanced Development Project. Orion is part of the Constellation Program to send human explorers back to the moon, and then onwards to Mars and other destinations in the Solar System. A component of the Vision for Space Exploration, Orion is being developed to also enable access to space following the retirement of the Space Shuttle in the next decade. This paper documents the development of a conceptual design, fabrication of prototype assemblies, component level testing and two generations of airbag landing system testing. The airbag system has been designed and analyzed using the transient dynamic finite element code LS-DYNA(RegisteredTradeMark). The landing system consists of six airbag assemblies; each assembly comprising a primary impact venting airbag and a non-venting anti-bottoming airbag. The anti-bottoming airbag provides ground clearance following the initial impact attenuation sequence. Incorporated into each primary impact airbag is an active vent that allows the entrapped gas to exit the control volume. The size of the vent is tailored to control the flow-rate of the exiting gas. An internal shaping structure is utilized to control the shape of the primary or main airbags prior to ground impact; this significantly improves stroke efficiency and performance

Understanding Unique Factors of Social Isolation and Loneliness of Military Veterans: A Delphi Study

Social isolation and loneliness are recognised societal issues, and it is estimated that between 5% and 18% of adults in the United Kingdom feel that they are ‘often’ or ‘always’ lonely (Co-Op Foundation and The Red Cross, 2016; Office for National Statistics, 2018). Furthermore, social isolation and loneliness are highlighted as being central to the narratives of military veterans, and the Armed Forces Community (Kiernan et al., 2018; Stapleton, 2018; Wilson, Hill, & Kiernan, 2018). This study aimed to gather expert consensus relating to the cause, impact and ways to tackle social isolation and loneliness of military veterans. It builds on previous research conducted by the Northern Hub for Veterans and Military Families Research, Northumbria University which highlighted that military veterans can experience social isolation and loneliness in a ‘unique’ way (Kiernan et al., 2018; Wilson, Hill & Kiernan, 2018). This ‘uniqueness’ is due to military-related intrinsic and extrinsic factors including number of transitions, military-related trauma such as limb loss, physical health and mobility, and losing touch with comrades (Kiernan et al., 2018; SSAFA, 2017; Stapleton, 2018; Wilson et al., 2018). Using the Delphi method (Helmer-Hirschberg, 1967) to gather expert consensus of military veterans’ social isolation and loneliness, this study aimed to: • Further explore the concept that veterans are considered as being ‘unique’ to adults to the general population, and other members of the armed forces community in their experiences of social isolation and loneliness. • Consider whether older veterans are ‘unique’ to younger veterans in their experiences of social isolation and loneliness. • Examine perceived factors leading to social isolation and loneliness of veterans. • Identify perceptions of how to tackle veterans’ social isolation and loneliness

Setting priorities for development of emerging interventions against childhood diarrhoea

An expert panel exercise was conducted to assess feasibility and potential effectiveness of 10 emerging health interventions against childhood diarrhoea. Twelve international experts were invited to take part in a CHNRI priority setting process. This group used 12 different criteria relevant to successful development and implementation of the emerging interventions, nine of which were retained in the final analysis. They showed most collective optimism towards developing household or community-level water treatment, followed by sustainable, affordable latrine options; those two emerging interventions were followed by antibiotic therapy of Cryptosporidium diarrhoea, and oral or transcutaneous enteric vaccine development

Effects of breaking up sedentary time with "chair squats" on postprandial metabolism

Prolonged sitting induces adverse metabolic changes. We aimed to determine whether breaking up prolonged sedentary time with short periods of repeated sit-to-stand transitions (“chair squats”) every 20 minutes influences postprandial metabolic responses. Fourteen participants (11 men, 3 women), age 37 ± 16 years, BMI 30.5 ± 3.8 kg.m−2 (mean ± SD) each participated in two experimental trials in random order, in which they arrived fasted, then consumed a test breakfast (8 kcal.kg−1 body weight, 37% energy from fat, 49% carbohydrates, 14% protein) and, 3.5 hours later, an identical test lunch. Expired air and blood samples were taken fasted and for 6.5 hours postprandially. In one trial (SIT) participants sat continuously throughout the observation period; in the “Chair squat” trial (SIT/STAND), participants performed “chair squats” (10 × standing and sitting over 30 seconds, every 20 minutes). Compared to SIT, energy expenditure was 409.7 ± 41.6 kJ (16.6 ± 1.7%) higher in SIT/STAND (p < 0.0001). Postprandial insulin concentrations over the post-breakfast period were 10.9 ± 8.4% lower in SIT/STAND than SIT (p = 0.047), but did not differ between trials in the post-lunch period. Glucose and triglyceride concentrations did not differ significantly between trials. These data demonstrate that a simple, unobtrusive intervention to break up sedentary time can induce some favourable metabolic changes