细化搜索
结果 1-10 的 1,597
Fluorescent Nano pH Indicators Based on Supramolecular Interactions
2014
Langhals, Heinz | Pust, Tim
Lipophilic pH-sensitive perylene derivatives were combined with detergents in a supramolecular arrangement to obtain nanomicelles that can be applied as fluorescent pH indicators for the aqueous phase.
显示更多 [+] 显示较少 [-]Exploring bioenergy potentials of built-up areas based on NEG-EROEI indicators
2014
Arodudu, Oludunsin | Ibrahim, Esther | Voinov, Alexey | van Duren, Iris
The production of bioenergy is dependent on the supply of biomass. Biomass production for bioenergy may cause large land use conversions, impact agricultural production, food prices, forest conservation, etc. The best solution is to use biomass that does not have agricultural or ecological value. Some of such unconventional sources of biomass are found within urban spaces. We employed Geographic Information System (GIS) and quantitative Life Cycle Assessment (LCA) methodologies to identify and estimate bioenergy potential of green roofs and other bioenergy options within urban areas. Net Energy Gain (NEG) and Energy Return on Energy Invested (EROEI) were used as indicators to assess the bioenergy potential of urban spaces within the Overijssel province of the Netherlands as a case study. Data regarding suitable areas were geometrically extracted from available GIS datasets, and used to estimate the biomass/bioenergy potential of different species with different yields per hectare, growing under different environmental conditions. We found that potential net-energy gain from built-up areas can meet 0.6–7.7% of the 2030 renewable energy targets of the province without conflicting with socio-ecological concerns, while also improving human habitat.
显示更多 [+] 显示较少 [-]A Study on the Development of Organizational Diagnosis Indicators for Meister school based on BSC
2014
Choi, S.J., Korea Research Institute for Vocational Education and Training, Seoul, Republic of Korea | Kim, J.W., Korea Research Institute for Vocational Education and Training, Seoul, Republic of Korea | Jeong, H.Y., Korea Research Institute for Vocational Education and Training, Seoul, Republic of Korea | Kim, K.I., Korea Research Institute for Vocational Education and Training, Seoul, Republic of Korea | Kim, Y.K., Ministry of Education, Seoul, Republic of Korea
The purpose of this study was to develope the organizational diagnosis indicators for Meister school based on BSC. The study was conducted in the following process. A first draft of organizational diagnosis indicators was developed based on the result of previous research review and expert consultation. Next, delphi survey was carried out with 10 expert panels consisting of professors, teachers and field experts to examine the validity of this indicators. The data analysis in this study was based on statistical approach including central tendency, variability, the feature of opinion agreement and acceptance, CVR(Content validity ratio). The study shows that final Organizational Diagnosis indicators consists of 4 dimensions, 16 categories, 34 variables, 73 details. Developed organizational diagnosis indicators for analyzing current status of school can be utilized to performance management. Furthermore, it can be used to reflect opinion of the persons concerned and to find improvement point according to the result of a diagnosis.
显示更多 [+] 显示较少 [-]Trophic level-based indicators to track fishing impacts across marine ecosystems
2014
Shannon, Lynne | Coll, Marta | Bundy, Alida | Gascuel, Didier, D. | Heymans, Johanna J. | Kleisner, Kristin | Lynam, Christopher P. | Piroddi, Chiara | Tam, Jorge | Travers-Trolet, Morgane | Shin, Yunne | Marine Research Institute and Department of Biological Sciences ; University of Cape Town | Ecosystèmes Marins Exploités (UMR EME) ; Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM) | Ecopath International Initiative Research Association | Population Ecology Division ; Institut océanographique Bedford - Bedford Oceanographic Institute [Dartmouth, Canada] (IOB) | Écologie et santé des écosystèmes (ESE) ; Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST | Scottish Association for Marine Science (SAMS) | Lowestoft Laboratory ; Centre for Environment, Fisheries and Aquaculture Science (CEFAS) | Water Resources Unit [Ispra] ; JRC Institute for Environment and Sustainability (IES) ; European Commission - Joint Research Centre [Ispra] (JRC)-European Commission - Joint Research Centre [Ispra] (JRC) | Instituto del Mar del Peru (IMARPE) | Unité Écologie et Modèles pour l'Halieutique (EMH) ; Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) | South African Research Chair Initiative - South African Department of Science and Technology (DST) | European Commission through the Marie Curie CIG grant | Defra [M1228] | Spanish Research Program Ramon y Cajal | French project EMIBIOS (FRB) [APP-SCEN-2010-II] | European collaborative project MEECE - Marine Ecosystem Evolution in a Changing Environment - (FP7) [212085] | Fisheries and Oceans Canada SPERA project 'Ecosystem indicators for ecosystem monitoring at different scales' | Conservation International | University of British Columbia | Pew Charitable Trusts | EU FP7 project DEVOTES [308392]
International audience | Trophic level (TL)-based indicators have been widely used to examine fishing impacts in aquatic ecosystems and the induced biodiversity changes. However, much debate has ensued regarding discrepancies and challenges arising from the use of landings data from commercial fisheries to calculate TL indicators. Subsequent studies have started to examine survey-based and model-based indicators. In this paper, we undertake an extensive evaluation of a variety of TL indicators across 9 well-studied marine ecosystems by making use of model-as well as surveyand catch-based TL indicators. Using detailed regional information and data on fishing history, fishing intensity, and environmental conditions, we evaluate how well TL indicators are capturing fishing effects at the community level of marine ecosystems. Our results highlight that the differences observed between TL indicator values and trends is dependent on the data source and the TL cut-off point used in the calculations and is not attributable to an intrinsic problem with TL-based indicators. All 3 data sources provide useful information about the structural changes in the ecosystem as a result of fishing, but our results indicate that only model-based indicators represent fishing impacts at the whole ecosystem level.
显示更多 [+] 显示较少 [-]Ecological accounting for an integrated “pig–biogas–fish” system based on emergetic indicators
2014
Wu, X.F. | Wu, X.D. | Li, J.S. | Xia, X.H. | Mi, T. | Yang, Q. | Chen, G.Q. | Chen, B. | Hayat, T. | Alsaedi, A.
With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated “pig–biogas–fish” system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the “pig–biogas–fish” system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and transformity of the “pig–biogas–fish” system is calculated as 1.26E+05seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the “pig–biogas–fish” system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the “pig–biogas–fish” system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system.
显示更多 [+] 显示较少 [-]Enhanced ratiometric fluorescent indicators for magnesium based on azoles of the heavier chalcogens
2014
Afzal, Mohammad S. | Pitteloud, Jean-Philippe | Buccella, Daniela
Red-shifted fluorescent indicators for magnesium were developed by incorporation of sulfur or selenium in the azole moiety of ‘fura’ fluorophores. Single atom replacement in the acceptor of these ITC probes affords longer excitation and emission wavelengths as well as greater separation between excitation bands, valuable for ratiometric intracellular Mg²⁺ imaging.
显示更多 [+] 显示较少 [-]Trophic level-based indicators to track fishing impacts across marine ecosystems
2014
Shannon, Lynne | Coll, Marta | Bundy, Alida | Gascuel, Didier | Heymans, Johanna J; | Kleisner, Kristin | Lynam, Christopher | Piroddi, Chiara | Tam, Jorge | Travers-trolet, Morgane | Shin, Yunne
Trophic level (TL)-based indicators have been widely used to examine fishing impacts in aquatic ecosystems and the induced biodiversity changes. However, much debate has ensued regarding discrepancies and challenges arising from the use of landings data from commercial fisheries to calculate TL indicators. Subsequent studies have started to examine survey-based and model-based indicators. In this paper, we undertake an extensive evaluation of a variety of TL indicators across 9 well-studied marine ecosystems by making use of model- as well as surveyand catch-based TL indicators. Using detailed regional information and data on fishing history, fishing intensity, and environmental conditions, we evaluate how well TL indicators are capturing fishing effects at the community level of marine ecosystems. Our results highlight that the differences observed between TL indicator values and trends is dependent on the data source and the TL cut-off point used in the calculations and is not attributable to an intrinsic problem with TLbased indicators. All 3 data sources provide useful information about the structural changes in the ecosystem as a result of fishing, but our results indicate that only model-based indicators represent fishing impacts at the whole ecosystem level.
显示更多 [+] 显示较少 [-]A Conceptual List of Indicators for Urban Planning and Management Based on Earth Observation
2014
Chrysoulakis, Nektarios | Feigenwinter, Christian | Triantakonstantis, Dimitrios | Penyevskiy, Igor | Tal, Abraham | Parlow, Eberhard | Fleishman, Guy | Düzgün, Sebnem | Esch, Thomas | Marconcini, Mattia
Sustainable development is a key component in urban studies. Earth Observation (EO) can play a valuable role in sustainable urban development and planning, since it represents a powerful data source with the potential to provide a number of relevant urban sustainability indicators. To this end, in this paper we propose a conceptual list of EO-based indicators capable of supporting urban planning and management. Three cities with different typologies, namely Basel, Switzerland; Tel Aviv, Israel; and Tyumen, Russia were selected as case studies. The EO-based indicators are defined to effectively record the physical properties of the urban environment in a diverse range of environmental sectors such as energy efficiency, air pollution and public health, water, transportation and vulnerability to hazards. The results assess the potential of EO to support the development of a set of urban environmental indicators towards sustainable urban planning and management.
显示更多 [+] 显示较少 [-]Interaction network based early-warning indicators of vegetation transitions
2014
Tirabassi, G. | Viebahn, J. | Dakos, Vasilis | Dijkstra, Henk A. | Masoller, C. | Rietker, M. | Dekker, S.C.
Changes in vegetation patterns in semi-arid regions can precede the abrupt transition to bare soil. Here, complex network techniques are used to develop novel early-warning indicators for these desertification transitions. These indicators are applied to results from a local positive feedback vegetation model and are compared to classical indicators, such as the autocorrelation and variance of biomass time series. A quantitative measure is also introduced to evaluate the quality of the early-warning indicators. Based on this measure, the network-based indicators are superior to the classical ones, being more sensitive to the presence of the transition point. | Peer Reviewed
显示更多 [+] 显示较少 [-]Food and nutrition in numbers 2014
2014
Overcoming malnutrition in all of its forms – caloric undernourishment, micronutrient deficiencies and obesity – requires a combination of interventions in different areas that guarantee the availability of and access to healthy diets. Among the key areas, interventions are required in food systems, public health systems and the provision of safe water and sanitation. This pocketbook not only focuses on indicators of food security and nutritional outcomes but also on the determinants that contribute to healthy lives. The pocketbook is structured in two sections: Thematic spreads related to food security and nutrition, including detailed food consumption data collected from national household budget surveys; Comprehensive country and regional profiles with indicators categorized by anthropometry, nutritional deficiencies, supplementation, dietary energy supplies, preceded by their "setting". The setting provides demographic indicators as well as health status indicators based on mortality patterns and the provision of safe water and sanitation. Anthropometry indicators provide information not only on the prevalence of acute and chronic forms of under-nutrition but also on the prevalence of obesity. Their co-existence is often referred to as the double burden of malnutrition. Nutritional deficiency indicators reveal food security issues at the national level based on the adequacy of energy supplies; they also reveal the prevalence of micronutrient deficiencies, often referred to as “hidden hunger”. Combined with anthropometric measurements, they allow for the identification of the triple burden of malnutrition (under-nutrition, obesity and hidden hunger). Regarding hidden hunger, indicators concerning iodine and vitamin A have been selected. Dietary indicators are based on national food supplies and inform on the overall quality of diets. Focus is also on the importance of diets during the first 1 000 days of an infant’s life, with indicators selected on the quality of breastfeeding, dietary diversity and meal frequency.
显示更多 [+] 显示较少 [-]