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  • 2015-2019  (31)
  • 2015  (31)
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  • 2015-2019  (31)
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  • 2015  (31)
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  • 1
    Online Resource
    Online Resource
    Zheng-Hong, TAN ; 1Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China; ; 2Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; ; [et al.]
    Chinese Journal of Plant Ecology ; 2015
    In:  Chinese Journal of Plant Ecology Vol. 39, No. 6 ( 2015), p. 541-553
    In: Chinese Journal of Plant Ecology, Chinese Journal of Plant Ecology, Vol. 39, No. 6 ( 2015), p. 541-553
    Type of Medium: Online Resource
    ISSN: 1005-264X
    Language: English
    Publisher: Chinese Journal of Plant Ecology
    Publication Date: 2015
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    IGI Global ; 2015
    In:  International Journal of Knowledge and Systems Science Vol. 6, No. 4 ( 2015-10-1), p. 50-69
    In: International Journal of Knowledge and Systems Science, IGI Global, Vol. 6, No. 4 ( 2015-10-1), p. 50-69
    Type of Medium: Online Resource
    ISSN: 1947-8208 , 1947-8216
    URL: Issue
    URL: Issue
    Language: Ndonga
    Publisher: IGI Global
    Publication Date: 2015
    detail.hit.zdb_id: 2703502-5
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  • 3
    In: Journal of Scientific and Innovative Research, BioMed Research Publishers, Vol. 4, No. 5 ( 2015-10-25), p. 213-217
    Abstract: Soil organic carbon (SOC) is widely used as a proxy for soil health and soil fertility. Land use change(LUC) has been implicated as one of the factors leading to the loss of SOC and increased release of green house gases (GHGs) to the atmosphere hence contributing to global climate change (GCC). Rwanda is a mountainous country and has faced a challenge of land use inter-conversions between forests, perennial crops and annual crops over the years. The impact of LUC on SOC stocks is poorly documented. The aim of this study was to investigate the effect of LUC and slope positions on SOC stocks in Kitabi watershed. Lands at TM-5 images of 2008 and 1986 were used to make a land use change map using Maximum Likelihood Classification (MLC) algorithm in Erdas. Slope positions were derived from the DEM using Topographic Position Index (TPI) tool and the output raster was overlaid with the LUC map to identify sample strata. Soil samples were obtained using stratified top sequential random sampling from annual crops, community tea and factory tea. A total of 134 soil samples were taken from the three LU categories along each of the three slope positions: upslope, middle slope and down slope. Soil sampling was done at two depths 0-20 cm and 20-50 cm in each land use category using a soil auger. To make a composite soil mixture, five samples were taken from 10 m x 10 m plots in each land use category.SOC laboratory analysis was done using Loss on ignition (LOI). One-Way ANOVA and Games Howell tests were used to analyze the data. Results indicate that LU types significantly affect SOC stocks (p 〈 0.001) while slope position does not (p =.491). The interaction of LU and slope position has no significant effect on SOC stocks across the three land use types (p = .061). Good management practices in community tea and soil erosion control measures in annual crops are recommended.
    Type of Medium: Online Resource
    ISSN: 2320-4818
    Language: Unknown
    Publisher: BioMed Research Publishers
    Publication Date: 2015
    detail.hit.zdb_id: 2766484-3
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  • 4
    Online Resource
    Online Resource
    CSIRO Publishing ; 2015
    In:  International Journal of Wildland Fire Vol. 24, No. 2 ( 2015), p. 151-
    In: International Journal of Wildland Fire, CSIRO Publishing, Vol. 24, No. 2 ( 2015), p. 151-
    Abstract: Global social-economic and environmental changes are increasing the challenges of wildfire risk management. Addressing these challenges requires perspectives beyond knowledge of the bio-physical dynamics of fire. This Special Section provides some such perspectives, including safety, children's understanding of the risk, indigenous knowledge of fire, and ‘shared responsibility’. Each paper highlights important challenges and ideas for fire management.
    Type of Medium: Online Resource
    ISSN: 1049-8001
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2015
    SSG: 12
    SSG: 23
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  • 5
    Online Resource
    Online Resource
    Lujosh Ventures Limited ; 2015
    In:  Nigerian Journal of Entomology Vol. 31, No. 1 ( 2015-12-22)
    In: Nigerian Journal of Entomology, Lujosh Ventures Limited, Vol. 31, No. 1 ( 2015-12-22)
    Abstract: Globalization is defined as the integration of economic, political, and cultural systems around the world and it is recognized as a force for economic growth. It is powerfully driven by advances in science and technology, information and communication technology, anthropogenic activities of which the most dynamically expanding in frontiers are commerce, tourism, and humanitarian aids. As a consequence, trans-boundary insect pest species are increasing. We enumerate the consequences, economic, ecological and environmental impacts of insect pests on a global scale and posit that the competitiveness of the Nigerian Entomologist as a key player in the knowledge economy that drives national and international trade policies and regulations, national, regional, international pest management programmes is still at a very low ebb. To equip the Nigerian Entomologist for global impact requires designing educational programmes to enhance ability to shape, evaluate and implement policies designed to mitigate challenges of globalization; build both research and management capacity; strengthen and make more impactful contributions to national, regional, and international legal framework on phytosanitation; create and uphold public awareness; and promote international co-operation. We advocate commencement of an Entomology 1st degree programme premised on education for knowledge-driven development and entrepreneurship. Furthermore, the National Executive Council of the Entomological Society of Nigeria is urged to expedite action on the legal framework required to establish the Nigerian Institute of Entomology for the regulation and control of the profession.
    Type of Medium: Online Resource
    ISSN: 0331-0094
    URL: Issue
    URL: Issue
    Language: English
    Publisher: Lujosh Ventures Limited
    Publication Date: 2015
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  • 6
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2015
    In:  Canadian Journal of Forest Research Vol. 45, No. 10 ( 2015-10), p. 1358-1368
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 45, No. 10 ( 2015-10), p. 1358-1368
    Abstract: Mexican temperate forests, at the southernmost end of the distribution range of this ecosystem, are the world’s centre of diversity of pine and oak, with 55 and 161 species, respectively. Such forests are threatened by land-use change, unsustainable forest management practices, and climate change; these threats reduce their diversity, alter the distribution ranges of species, modify disturbance regimes, and reduce ecosystem adaptability. This paper briefly reviews (i) the ecology of the Mexican temperate forests, (ii) the ecological basis for the unique diversity of pine and oak species, (iii) the main disturbances as well as the main drivers of global changes affecting these forests, in particular climate change, and (iv) the social, economic, and cultural factors to be considered in proposing a new forest management approach. It proposes a new conceptual framework to manage Mexican temperate forests that are in line with (i) their natural dynamics, (ii) the rapidly changing and uncertain global environmental, social, and economic conditions, and (iii) the complex adaptive system approach. This new forest management combines functional zoning, multispecies plantations, and sylvicultural interventions to increase the adaptive capacity of forests as a way to balance the increasing need for timber products with the need for other ecosystem services facing rapidly changing and uncertain future environmental, social, and economic conditions.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    SAGE Publications ; 2015
    In:  Waste Management & Research: The Journal for a Sustainable Circular Economy Vol. 33, No. 5 ( 2015-05), p. 410-418
    In: Waste Management & Research: The Journal for a Sustainable Circular Economy, SAGE Publications, Vol. 33, No. 5 ( 2015-05), p. 410-418
    Abstract: Since medical insurance was introduced in the Republic of Korea, there have been several increases concerning medical waste. In order to solve these problems, we have applied life cycle assessment and life cycle cost. But these methods cannot be a perfect decision-making tool because they can only evaluate environmental and economic burdens. Thus, as one of many practical methods the shared smart and mutual – green growth considers economic growth, environmental protection, social justice, science technology and art, and mutual voluntarism when applied to medical waste management in the Republic of Korea. Four systems were considered: incineration, incineration with heat recovery, steam sterilisation, and microwave disinfection. This research study aimed to assess pollutant emissions from treatment, transport, and disposal. Global warming potential, photochemical oxidant creation potential, acidifications potential, and human toxicity are considered to be environmental impacts. Total investment cost, transport cost, operation, and maintenance cost for the medical waste are considered in the economy evaluations though life cycle cost. The social development, science technology and art, and mutual voluntarism are analysed through the Delphi-method conducted by expert groups related to medical waste. The result is that incineration with heat recovery is the best solution. However, when heat recovery is impossible, incineration without heat recovery becomes the next best choice. That is why 95% of medical waste is currently treated by both incineration and incineration with heat recovery within the Republic of Korea.
    Type of Medium: Online Resource
    ISSN: 0734-242X , 1096-3669
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2015
    detail.hit.zdb_id: 1480483-9
    detail.hit.zdb_id: 46937-3
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  • 8
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 2015
    In:  The Journal of Agricultural Science Vol. 153, No. 3 ( 2015-04), p. 411-421
    In: The Journal of Agricultural Science, Cambridge University Press (CUP), Vol. 153, No. 3 ( 2015-04), p. 411-421
    Abstract: Livestock production is increasingly facing consumer concern about the environmental impact of different production systems. In order to provide a detailed insight into the contribution of pork production, a life-cycle assessment (LCA) of average German pork production was performed. In this way, the global warming potential was estimated at 3·22 kg CO 2 -eq/kg pork, eutrophication at 23·3 g PO 4 -eq and acidification at 57·1 g SO 2 -eq. The functional unit was 1 kg pork as a slaughter weight. The analysis aimed at identifying those farm parameters which had most impact on the LCA results. For that purpose, a deterministic pig farm model was developed which reflected all the processes of a pig farm, while focusing on five distinct areas: general farm information, biological performance, basic feed data, manure management and resource use and emissions. In this way, it was possible to vary the level of performance parameters from farrowing (piglet losses and number of piglets born alive per litter) and finishing stage (lean-meat content, daily weight gain, animal losses and feed conversion ratio). The number of piglets born alive, the lean-meat content and the feed conversion ratio were identified as having the greatest influence on the results. In comparison with average pork production, the values of the impact categories increased and decreased by up to 4·7%. The results show that the fertility of sows and the feed management of finishers should be optimized to mitigate environmental impacts at pig farm level.
    Type of Medium: Online Resource
    ISSN: 0021-8596 , 1469-5146
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2015
    detail.hit.zdb_id: 1498349-7
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  • 9
    Online Resource
    Online Resource
    Sultan Qaboos University ; 2015
    In:  Journal of Agricultural and Marine Sciences [JAMS] Vol. 20 ( 2015-01-01), p. 16-
    In: Journal of Agricultural and Marine Sciences [JAMS], Sultan Qaboos University, Vol. 20 ( 2015-01-01), p. 16-
    Abstract: The last 50 years of fouling research and management taught us that indiscriminate use of toxic approaches damages ecosystem services of estuaries and oceans critical to man’s existence. Next generation environmentally benign management requires knowledge of the fouling process and an understanding of the consequences of different management options. An intermediate step may be additives that fit with existing business models and distribution systems, but that carry a much reduced environmental footprint. Subsequently, the evolution of a next generation hull fouling management system with limited toxicity easy clean surfaces should replace or augment the existing commercial easy-release coatings. These new technologies require new business models and infrastructure. The path for a new commercial hull coating, from a concept to the actual product takes 25 to 35 years to complete. Major challenges include fitting in with existing business models and systems and meeting regulations. Leveraging on our experience in the development of additives as a case example, we offer a perspective on what the new fouling management systems might involve and discuss issues to be addressed as limited toxicity easy-clean coatings gain market share. As existing business cannot easily adapt to a different business model, evolution of new management solutions will require resources, a necessary long term perspective, and close working relationships between business and science to enable products in the global market. 
    Type of Medium: Online Resource
    ISSN: 2410-1079 , 2410-1060
    Language: Unknown
    Publisher: Sultan Qaboos University
    Publication Date: 2015
    detail.hit.zdb_id: 2160952-4
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  • 10
    Online Resource
    Online Resource
    Hamad bin Khalifa University Press (HBKU Press) ; 2015
    In:  Journal of Local and Global Health Science Vol. 2015, No. 2 ( 2015-11-12)
    In: Journal of Local and Global Health Science, Hamad bin Khalifa University Press (HBKU Press), Vol. 2015, No. 2 ( 2015-11-12)
    Abstract: Today, the world has observed a remarkable growth in the use of transportation mobile communications for road safety. While a user in a vehicle moves to a new communication cell, a wireless terminal requests a handoff for new channel in the new cell. Due to that movement, some of the challenges issues are developed such as, the increase in traffic volumes and demand for high speed transportation mobile communications call for fast, seamless and high performance handoff in mobile communications network. When a wireless user in a vehicle moves from one base station cell to another, handoff protocols reroute the existing active connections in the new transportation cell. The future challenges in next generation high speed transportation mobile networks are to minimize the packet loss and to provide efficient use of the network resources while maintaining quality of service assurances. Therefore, the performance of efficient management and a successful handoff operation in transportation mobile networks become an important issue for road safety traffic. This work shows analytical handoff management for transportation users in a high speed mobile communications network. We demonstrate the performance of handoffs with mobility consideration using several metrics including the alteration of states prior to reaching a transportation mobility cell boundary, the speed of transportation mobile terminal, and the distance between a transportation mobile terminal and a transportation cell boundary. We illustrate the performance evaluation for the factor of transportation mobility with taking into account the high speed status of a mobile vehicle user. Numerical results of the transportation performance analysis and the probability of requiring a handoff are demonstrated using Maple. Figure 1 shows a shaped region of a cellular network and the cellular handoff model with mobility. In this abstract, we modeled the cellular handoff for multimedia users with taking the high speed mobility into account in wireless mobile networks. The performance results in terms of state probabilities and the probability that a mobile terminal reached a cell boundary were investigated. The mobilized analysis involved with number of issues such as the alternation of states before a mobile unit reached a cell boundary, the distance between the mobile terminal and a cell boundary and the speed of the vehicle. Based on the assumption of the alternation of states, there were four situations for a vehicle to reach a cell boundary. Performance results were accurately analyzed based on these four situations. It was clearly showing that for a vehicle that experienced the change of states, the outcome chance of reaching a cell boundary was proportional to the distance in between the mobile terminal and a cell boundary and inversely propositional to the speed of the vehicle. References [1] J. Naylon, D. Gilmurray, J. Porter and A. Hopper, “Low-latency handover in a wireless ATM LAN,” IEEE Journal on Selected Areas in Communication, Vol. 16, pp. 909-921, Aug. 1998. [2] A. Acharya, S. Biswas, L. French, J. LI and D. Raychaudhuri, “Handoff and location management in mobile ATM networks,” Proceeding3rd International Conference Mobile Multimedia Communication, September 1996. [3] A. Acharya, J. Li, B. Rajagopalan and D. Raychaudhuri, “Mobility management in wireless ATM networks,” IEEE Communications Magazine, pp. 100-109, 1997. [4] Y. Fei, V. W. Wong, V. C. Leung, “Efficient QoS provisioning for adaptive multimedia in mobile communication networks by reinforcement learning,” Mobile Networks and Applications, Vol. 11, pp. 101-110, 2006. [5] J. G. Guzman, j. M. Bauset, and V. Pla, “Performance bounds for mobile cellular networks with handover prediction,” Management of Multimedia Networks and Services, Springer Berlin / Heidelberg, pp. 35-46, 2005. [6] R. Zander and J. M. Kalsson, “Combining bandwidth borrowing and reservation in cellular networks,” International Journal of Wireless Information Networks, Vol. 12, No. 3, pp. 187-201, 2005. [7] G. H. Ma and A. Y. Zomaya, “an efficient channel allocation scheme for cellular network using maximum channel packing,” Wireless Communications and Mobile computing, vol. 4, pp. 683-692, 2004. [8] K. Q. Tian and D. C. Cox, “Mobility management in wireless networks: data replication strategies and applications,” Kluwer Academic Publishers, New York, 2004. [9] A. R. Momen and P. Azmi, Stochastic vehicle mobility with environmental condition adaption capability,” Wireless Communications and Mobile computing, Vol. 9, pp.1070-1080, 2008. [10] K. Ioannou, S. Kotsopoulos, and P. Stavroulakis, “Optimizing the QoS of high speed moving terminals in cellular networks,” International Journal of Communications systems, Vol. 16, pp. 851-863, 2003. [11] S. S. Rappaport, “The Multiple-call hand-off problem in high-capacity cellular communication System,” IEEE Transactions on Vehicular Technology, Vol. 40, No. 3, p.p. 546-557, 1991. [12] S. Nanda, “Teletraffic models for urban and suburban microcells: cell sizes and handoff rates,” IEEE Transactions on Vehicular Technology, Vol. 42, No. 4, p.p 673-682, 1993.
    Type of Medium: Online Resource
    ISSN: 2223-0440
    Language: English
    Publisher: Hamad bin Khalifa University Press (HBKU Press)
    Publication Date: 2015
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