• Energy Research
• 13. Climate action close
• 15. Life on land close
• GB close
• University of North Texas close

The Evaluation of Oxygen Interactions with Materials 3 (EOIM-3) flight experiment was developed to obtain benchmark atomic oxygen/material reactivity data. The experiment was conducted during Space Shuttle mission 46 (STS-46), which flew July 31 to August 7, 1992. Quantitative interpretation of the materials reactivity measurements requires a complete and accurate definition of the space environment exposure, including the thermal history of the payload, the solar ultraviolet exposure, the atomic oxygen fluence, and any spacecraft outgassing contamination effects. The thermal history of the payload was measured using twelve thermocouple sensors placed behind selected samples and on the EOIM-3 payload structure. The solar ultraviolet exposure history of the EOIM-3 payload was determined by analysis of the as-flown orbit and vehicle attitude combined with daily average solar ultraviolet and vacuum ultraviolet (UV/VUV) fluxes. The atomic oxygen fluence was assessed in three different ways. First, the O-atom fluence was calculated using a program that incorporates the MSIS-86 atmospheric model, the as-flown Space Shuttle trajectory, and solar activity parameters. Second, the oxygen atom fluence was estimated directly from Kapton film erosion. Third, ambient oxygen atom measurements were made using the quadrupole mass spectrometer on the EOIM-3 payload. Our best estimate of the oxygen atom fluence as of this writing is 2.3 +/- 0.3 x 10(exp 20) atoms/sq cm. Finally, results of post-flight X-ray photoelectron spectroscopy (XPS) surface analyses of selected samples indicate low levels of contamination on the payload surface.

AbstractThe U.S. Department of Energy has launched the commercial building initiative (CBI) in pursuit of its research goal of achieving zero‐net‐energy commercial buildings (ZNEB), i.e., ones that produce as much energy as they use. Its objective is to make these buildings marketable by 2025 such that they minimize their energy use through cutting‐edge, energy‐efficiency technologies and meet their remaining energy needs through on‐site renewable energy generation. This paper examines how such buildings may be implemented within the context of a cost‐ or CO2‐minimizing microgrid that is able to adopt and operate various technologies: photovoltaic (PV) modules and other on‐site generation, heat exchangers, solar thermal collectors, absorption chillers, and passive/demand‐response technologies. A mixed‐integer linear program (MILP) that has a multi‐criteria objective function is used. The objective is minimization of a weighted average of the building's annual energy costs and CO2 emissions. The MILP's constraints ensure energy balance and capacity limits. In addition, constraining the building's energy consumed to equal its energy exports enables us to explore how energy sales and demand‐response measures may enable compliance with the ZNEB objective. Using a commercial test site in northern California with existing tariff rates and technology data, we find that a ZNEB requires ample PV capacity installed to ensure electricity sales during the day. This is complemented by investment in energy‐efficient combined heat and power (CHP) equipment, while occasional demand response saves energy consumption. A large amount of storage is also adopted, which may be impractical. Nevertheless, it shows the nature of the solutions and costs necessary to achieve a ZNEB. Additionally, the ZNEB approach does not necessary lead to zero‐carbon (ZC) buildings as is frequently argued. We also show a multi‐objective frontier for the CA example, which allows us to estimate the needed technologies and costs for achieving a ZC building or microgrid. Copyright © 2010 John Wiley & Sons, Ltd.

SummaryHigh biomass crops have recently attracted significant attention as an alternative platform for the renewable production of high energy storage lipids such as triacylglycerol (TAG). While TAG typically accumulates in seeds as storage compounds fuelling subsequent germination, levels in vegetative tissues are generally low. Here, we report the accumulation of more than 15% TAG (17.7% total lipids) by dry weight in Nicotiana tabacum (tobacco) leaves by the co‐expression of three genes involved in different aspects of TAG production without severely impacting plant development. These yields far exceed the levels found in wild‐type leaf tissue as well as previously reported engineered TAG yields in vegetative tissues of Arabidopsis thaliana and N. tabacum. When translated to a high biomass crop, the current levels would translate to an oil yield per hectare that exceeds those of most cultivated oilseed crops. Confocal fluorescence microscopy and mass spectrometry imaging confirmed the accumulation of TAG within leaf mesophyll cells. In addition, we explored the applicability of several existing oil‐processing methods using fresh leaf tissue. Our results demonstrate the technical feasibility of a vegetative plant oil production platform and provide for a step change in the bioenergy landscape, opening new prospects for sustainable food, high energy forage, biofuel and biomaterial applications.

Animals from embryos to adults experiencing stress from climate change have numerous mechanisms available for enhancing their long-term survival. In this review we consider these options, and how viable they are in a world increasingly experiencing extreme weather associated with climate change. A deeply understood mechanism involves natural selection, leading to evolution of new adaptations that help cope with extreme and stochastic weather events associated with climate change. While potentially effective at staving off environmental challenges, such adaptations typically occur very slowly and incrementally over evolutionary time. Consequently, adaptation through natural selection is in most instances regarded as too slow to aid survival in rapidly changing environments, especially when considering the stochastic nature of extreme weather events associated with climate change. Alternative mechanisms operating in a much shorter time frame than adaptation involve the rapid creation of alternate phenotypes within a life cycle or a few generations. Stochastic gene expression creates multiple phenotypes from the same genotype even in the absence of environmental cues. In contrast, other mechanisms for phenotype change that are externally driven by environmental clues include well-understood developmental phenotypic plasticity (variation, flexibility), which can enable rapid, within-generation changes. Increasingly appreciated are epigenetic influences during development leading to rapid phenotypic changes that can also immediately be very widespread throughout a population, rather than confined to a few individuals as in the case of favorable gene mutations. Such epigenetically-induced phenotypic plasticity can arise rapidly in response to stressors within a generation or across a few generations and just as rapidly be “sunsetted” when the stressor dissipates, providing some capability to withstand environmental stressors emerging from climate change. Importantly, survival mechanisms resulting from adaptations and developmental phenotypic plasticity are not necessarily mutually exclusive, allowing for classic “bet hedging”. Thus, the appearance of multiple phenotypes within a single population provides for a phenotype potentially optimal for some future environment. This enhances survival during stochastic extreme weather events associated with climate change. Finally, we end with recommendations for future physiological experiments, recommending in particular that experiments investigating phenotypic flexibility adopt more realistic protocols that reflect the stochastic nature of weather.

Over the past decade, long-term socio-ecological research (LTSER) has been established to better integrate social science research and societal concerns into the goals and objectives of the International Long-Term Ecological Research (ILTER) network, an established global network of long-term ecologicalmonitoring sites. TheHorizon 2020 eLTER project, currently underway, includes as one of its key objectives to evaluate the performance of LTSER platforms.This article reflects part of this evaluation: six LTSER platformswere assessed through site visits of the lead author, coupledwith reflections and insights of the platform managers, whoare also co-authors.We provide background for the mission and goals of LTSER, then assess the six international LTSERplatforms—Baltimore Ecosystem Study LTER, USA; Braila Island LTSER, Romania; Cairngorms LTSER, UK;Doñana LTSER, Spain;OmoraEthnobotanical Park CapeHorn LTER,Chile; and Sierra Nevada LTSER, Spain. While based on a strong theoretical foundation in socio-ecological research, there has been a steep learning curve for scientists applying the concept in practice at LTSERplatforms.We show positive impacts that have been achieved, including contributions to policy, land-use planning, and natural resourcemanagement.Weexplain key aspects of LTSERplatforms that have proven challenging, includingmanagement, interdisciplinary integration, and stakeholder collaboration.Wecharacterize the tensions between top-down desires for network harmonization, bottom-up demands such as local policy relevance, and platform-level constraints such as time and budget. Finally,we discuss challenges, such as local context dominating the character of LTSERplatforms, and the fact that scientists are often disincentivized from engaging in transdisciplinary science. Overall, we conclude that while the internationalnetwork offers important advantages to itsmembers, a more productive balance between local and global goals could be achieved, and membersmay need to temper their expectations of what the network can and cannot offer at the local level. Peer reviewed

The overall objective of this contract is to assist in the development of fuel-flexible combustion systems for gas turbines as well as Rankine and Stirling cycle engines. The primary emphasis of the program is on liquid hydrocarbons produced from non-petroleum resouces. Fuel-flexible combustion systems will provide for more rapid transition of these alternate fuels into important future energy utilization centers (especially utility power generation with the combined cycle gas turbine). The specific technical objectives of the program are to develop an improved understanding of relationships between alternate fuel properties and continuous combustion system effects, and to provide analytical modeling/correlation capabilities to be used as design aids for development of fuel-tolerant combustion systems. Efforts this past year have been to evaluate experimental procedures for studying alternate fuel combustion effects and to determine current analytical capabilities for prediction of these effects. Jet Stirred Combustor studies during this period have produced new insights into soot formation in strongly backmixed systems and have provided much information for comparison with analytical predictions. The analytical effort included new applications of quasi-global modeling techniques as well as comparison of prediction with the experimental results generated.

La dengue est liée au changement climatique dans les pays tropicaux et subtropicaux, notamment en République démocratique populaire lao (Laos) et en Thaïlande. La connaissance de ces problèmes et les mesures préventives peuvent affecter l'incidence et le risque d'épidémie de dengue. Par conséquent, la présente étude a été menée pour déterminer les connaissances, les attitudes et les pratiques (cap) parmi les communautés urbaines et rurales et les responsables gouvernementaux sur le changement climatique et la dengue au Laos et en Thaïlande. Une enquête transversale sur le changement climatique et la dengue a été menée auprès de 360 ménages au Laos (180 urbains et 180 ruraux), 359 ménages en Thaïlande (179 urbains et 180 ruraux) et 20 représentants du gouvernement (10 dans chaque pays) à l'aide de questionnaires structurés. L'analyse des données a été entreprise en utilisant des méthodes descriptives, l'analyse en composantes principales (ACP), le test du Chi carré ou le test exact de Fisher (le cas échéant) et la régression logistique. Des différences significatives entre les communautés sélectionnées dans les deux pays ont été trouvées en termes d'âge, de niveau d'éducation, de statut socio-économique, de niveau d'attitude face au changement climatique et de niveau de cap de la dengue (P < 0,05 ; IC à 95 %). Dans l'ensemble, le cap des participants sur le changement climatique et la dengue était faible, à l'exception du niveau d'attitude pour la dengue dans les deux pays. Le niveau de sensibilisation des responsables gouvernementaux à la relation climatique avec la dengue était également faible. Dans les ménages laotiens, les connaissances des participants sur le changement climatique et la dengue étaient significativement associées au niveau d'éducation et au statut socio-économique (SSE) (P < 0,01). Leurs attitudes à l'égard du changement climatique et de la dengue étaient associées au niveau d'éducation et à l'utilisation d'Internet (P < 0,05). Les pratiques liées au changement climatique des ménages étaient associées au SSE (P < 0,01) et les pratiques liées à la dengue étaient associées au niveau d'éducation, au SSE, à l'expérience antérieure de la dengue et à l'utilisation d'Internet (P < 0,01). En Thaïlande, les connaissances des participants sur le changement climatique étaient associées au niveau d'éducation et au SSE (P < 0,01). Leurs attitudes à l'égard du changement climatique étaient associées au statut de résidence (urbain/rural) et à l'utilisation d'Internet (P < 0,05) ; les pratiques liées au changement climatique étaient associées au niveau d'éducation et au SSE (P < 0,05). Les connaissances liées à la dengue des participants étaient associées au SSE et à l'expérience antérieure de la dengue (P < 0,05) ; les attitudes et les pratiques liées à la dengue des participants étaient associées au niveau d'éducation (P < 0,01). Les résultats appellent à des programmes de sensibilisation intégrés et urgents pour augmenter les niveaux de cap concernant l'adaptation au changement climatique, l'atténuation et la prévention de la dengue afin d'améliorer la santé et le bien-être des populations de ces deux pays et des pays similaires où la dengue est endémique. El dengue está relacionado con el cambio climático en países tropicales y subtropicales como la República Democrática Popular Lao (Laos) y Tailandia. El conocimiento sobre estos problemas y las medidas preventivas pueden afectar la incidencia y el riesgo de brote de dengue. Por lo tanto, el presente estudio se realizó para determinar el conocimiento, las actitudes y las prácticas (CAP) entre las comunidades urbanas y rurales y los funcionarios gubernamentales sobre el cambio climático y el dengue en Laos y Tailandia. Se realizó una encuesta Cap transversal sobre el cambio climático y el dengue en 360 hogares en Laos (180 urbanos y 180 rurales), 359 hogares en Tailandia (179 urbanos y 180 rurales) y 20 funcionarios gubernamentales (10 en cada país) utilizando cuestionarios estructurados. El análisis de datos se realizó utilizando métodos descriptivos, análisis de componentes principales (PCA), prueba de Chi-cuadrado o prueba exacta de Fisher (según corresponda) y regresión logística. Se encontraron diferencias significativas entre las comunidades seleccionadas en ambos países en términos de edad de los participantes del hogar, nivel de educación, nivel socioeconómico, nivel de actitud ante el cambio climático y nivel Cap de dengue (P < 0,05; IC del 95%). En general, la Cap de los participantes sobre el cambio climático y el dengue fue baja, excepto el nivel de actitud para el dengue en ambos países. El nivel de conciencia entre los funcionarios gubernamentales con respecto a la relación climática con el dengue también fue bajo. En los hogares de Laos, el conocimiento de los participantes sobre el cambio climático y el dengue se asoció significativamente con el nivel de educación y el nivel socioeconómico (ses) (P < 0,01). Sus actitudes hacia el cambio climático y el dengue se asociaron con el nivel educativo y el uso de internet (P < 0.05). Las prácticas relacionadas con el cambio climático de los hogares se asociaron con el ses (P < 0,01) y las prácticas relacionadas con el dengue se asociaron con el nivel educativo, el ses, la experiencia previa con el dengue y el uso de Internet (P < 0,01). En Tailandia, el conocimiento de los participantes sobre el cambio climático se asoció con el nivel de educación y el ses (P < 0,01). Sus actitudes hacia el cambio climático se asociaron con el estado de residencia (urbano/rural) y el uso de Internet (P < 0.05); las prácticas relacionadas con el cambio climático se asociaron con el nivel educativo y el ses (P < 0.05). El conocimiento relacionado con el dengue de los participantes se asoció con el ses y la experiencia previa del dengue (P < 0,05); las actitudes y prácticas relacionadas con el dengue de los participantes se asociaron con el nivel educativo (P < 0,01). Los hallazgos exigen programas de concientización integrados que se necesitan con urgencia para aumentar los niveles de Cap con respecto a la adaptación al cambio climático, la mitigación y la prevención del dengue para mejorar la salud y el bienestar de las personas en estos dos países y en países similares donde el dengue es endémico. Dengue is linked with climate change in tropical and sub-tropical countries including the Lao People's Democratic Republic (Laos) and Thailand. Knowledge about these issues and preventive measures can affect the incidence and outbreak risk of dengue. Therefore, the present study was conducted to determine the knowledge, attitudes, and practices (KAP) among urban and rural communities and government officials about climate change and dengue in Laos and Thailand. A cross-sectional KAP survey about climate change and dengue were conducted in 360 households in Laos (180 urban and 180 rural), 359 households in Thailand (179 urban and 180 rural), and 20 government officials (10 in each country) using structured questionnaires. Data analysis was undertaken using descriptive methods, principal component analysis (PCA), Chi-square test or Fisher's exact test (as appropriate), and logistic regression. Significant differences among the selected communities in both countries were found in terms of household participant's age, level of education, socioeconomic status, attitude level of climate change and KAP level of dengue (P < 0.05; 95% CI). Overall, participants' KAP about climate change and dengue were low except the attitude level for dengue in both countries. The level of awareness among government officials regarding the climatic relationship with dengue was also low. In Lao households, participants' knowledge about climate change and dengue was significantly associated with the level of education and socioeconomic status (SES) (P < 0.01). Their attitudes towards climate change and dengue were associated with educational level and internet use (P < 0.05). Householders' climate change related practices were associated with SES (P < 0.01) and dengue related practices were associated with educational level, SES, previous dengue experience and internet use (P < 0.01). In Thailand, participants' knowledge about climate change was associated with the level of education and SES (P < 0.01). Their attitudes towards climate change were associated with residence status (urban/rural) and internet use (P < 0.05); climate change related practices were associated with educational level and SES (P < 0.05). Dengue related knowledge of participants was associated with SES and previous dengue experience (P < 0.05); participants' dengue related attitudes and practices were associated with educational level (P < 0.01). The findings call for urgently needed integrated awareness programs to increase KAP levels regarding climate change adaptation, mitigation and dengue prevention to improve the health and welfare of people in these two countries, and similar dengue-endemic countries. ترتبط حمى الضنك بتغير المناخ في البلدان الاستوائية وشبه الاستوائية بما في ذلك جمهورية لاو الديمقراطية الشعبية (لاوس) وتايلاند. يمكن أن تؤثر المعرفة بهذه القضايا والتدابير الوقائية على حدوث وخطر تفشي حمى الضنك. لذلك، أجريت هذه الدراسة لتحديد المعرفة والمواقف والممارسات (KAP) بين المجتمعات الحضرية والريفية والمسؤولين الحكوميين حول تغير المناخ وحمى الضنك في لاوس وتايلاند. وأجريت دراسة استقصائية مستعرضة للمعارف والمواقف والممارسات بشأن تغير المناخ وحمى الضنك في 360 أسرة معيشية في لاوس (180 في المناطق الحضرية و 180 في المناطق الريفية)، و 359 أسرة معيشية في تايلند (179 في المناطق الحضرية و 180 في المناطق الريفية)، و 20 مسؤولا حكوميا (10 في كل بلد) باستخدام استبيانات منظمة. تم إجراء تحليل البيانات باستخدام الأساليب الوصفية، وتحليل المكونات الرئيسية (PCA)، واختبار مربع كاي أو اختبار فيشر الدقيق (حسب الاقتضاء)، والانحدار اللوجستي. تم العثور على اختلافات كبيرة بين المجتمعات المختارة في كلا البلدين من حيث عمر المشارك في الأسرة، ومستوى التعليم، والوضع الاجتماعي والاقتصادي، ومستوى الموقف من تغير المناخ ومستوى المعرفة والتعلم والتعلم والتعلم من حمى الضنك (P < 0.05 ؛ 95 ٪ CI). بشكل عام، كانت المعارف والمواقف والممارسات للمشاركين حول تغير المناخ وحمى الضنك منخفضة باستثناء مستوى الموقف تجاه حمى الضنك في كلا البلدين. كما كان مستوى الوعي بين المسؤولين الحكوميين فيما يتعلق بالعلاقة المناخية مع حمى الضنك منخفضًا. في أسر لاو، كانت معرفة المشاركين حول تغير المناخ وحمى الضنك مرتبطة بشكل كبير بمستوى التعليم والوضع الاجتماعي والاقتصادي (P < 0.01). ارتبطت مواقفهم تجاه تغير المناخ وحمى الضنك بالمستوى التعليمي واستخدام الإنترنت (P < 0.05). ارتبطت الممارسات المتعلقة بتغير المناخ لدى الأسر بالخدمات الاجتماعية والاقتصادية (P < 0.01) وارتبطت الممارسات المتعلقة بحمى الضنك بالمستوى التعليمي، والخدمات الاجتماعية والاقتصادية، وتجربة حمى الضنك السابقة واستخدام الإنترنت (P < 0.01). في تايلاند، ارتبطت معرفة المشاركين بتغير المناخ بمستوى التعليم و SES (P < 0.01). ارتبطت مواقفهم تجاه تغير المناخ بوضع الإقامة (حضري/ريفي) واستخدام الإنترنت (P < 0.05 )؛ ارتبطت الممارسات المتعلقة بتغير المناخ بالمستوى التعليمي و SES (P < 0.05). ارتبطت معرفة المشاركين المتعلقة بحمى الضنك بالخدمات البيئية والاجتماعية وتجربة حمى الضنك السابقة (P < 0.05 )؛ وارتبطت مواقف المشاركين وممارساتهم المتعلقة بحمى الضنك بالمستوى التعليمي (P < 0.01). تدعو النتائج إلى برامج توعية متكاملة مطلوبة بشكل عاجل لزيادة مستويات المعارف والمواقف والممارسات فيما يتعلق بالتكيف مع تغير المناخ والتخفيف من آثاره والوقاية من حمى الضنك لتحسين صحة ورفاهية الناس في هذين البلدين، والبلدان الموبوءة بحمى الضنك المماثلة.