Outgrower Schemes have been implemented in different parts of the world to provide wood to forest and other companies and as income alternatives for farmers in rural areas. They have been considered by some researcher...Outgrower Schemes have been implemented in different parts of the world to provide wood to forest and other companies and as income alternatives for farmers in rural areas. They have been considered by some researchers and practitioners as important advances in the area of planted forest and promoted by governments and forest companies in partnership with rural farmers and communities. Considering the importance of subsistence crops and forest products to smallholders and consumers and the economic viability of agroforestry, attention is given in this paper to Outgrower Schemes that combine tree planting with agroforestry, to contribute to food security and environment preservation in developing countries. The issue of Outgrower Schemes through integrated crops-tree systems was raised in a previous study of Outgrower Schemes in Brazil, commissioned by the FAO1. This paper examines, based on the research done for that study, the views and perspectives of the companies＇ personnel, the tree growers that participate in the programs studied, and other stakeholders＇ related institutions involved in such schemes with regard to the promotion of Outgrower Schemes through integrated crops-tree systems, linking them with agroforestry, which is a way those Outgrower Schemes can contribute to food security and environment preservation goals.展开更多
Green buildings should be sustainable, efficient, economical, and to improve the quality of life of users and nearby residents. Unfortunately, some architecture features fostered by energy and environmental certificat...Green buildings should be sustainable, efficient, economical, and to improve the quality of life of users and nearby residents. Unfortunately, some architecture features fostered by energy and environmental certifications do not comply with fire prevention codes. Several factors can influence a building＇s energy efficiency and fire safety, such as bigger or smaller glass areas, building material thermal inertia, and the use of sustainable solutions such as green roofs. In this work, a methodology for integrating energy efficiency and fire prevention in green buildings is presented. A case study comparing a full glass skin and a building with 40% window size is considered. Also, the methodology permits modifications for obtaining a safe and energy efficient building.展开更多
Concerning the integration of large-scale wind power,an integrated model of generation and transmission expansion planning is proposed based on the assessment of the value of steady state and dynamic security.In the a...Concerning the integration of large-scale wind power,an integrated model of generation and transmission expansion planning is proposed based on the assessment of the value of steady state and dynamic security.In the assessment of security value,the unit commitment simulation based on the predicted hourly load and wind power output data in the planning horizon is used to evaluate the costs of preventive control,emergency control and social losses due to the uncertainty of load and wind power.The cost of preventive control consists of the fuel cost of power generation,the environmental cost and the load shedding cost.This not only provides a systematic method of security assessment of power system expansion planning schemes,but also broadens the perspective of power system planning from the technology and economic assessment to the measure of the whole social value.In the assessment process,the preventive control and emergency control of cascading failures are also presented,which provides a convincing tool for cascading failure analysis of planning schemes and makes the security assessment more comprehensive and reasonable.The proposed model and method have been demonstrated by the assessment of two power system planning schemes on the New England 10-genarator 39-bus System.The importance of considering the value of security and simulating hourly system operation for the planning horizon,in expansion planning of power system with integration of large-scale wind power,has been confirmed.展开更多
文摘Outgrower Schemes have been implemented in different parts of the world to provide wood to forest and other companies and as income alternatives for farmers in rural areas. They have been considered by some researchers and practitioners as important advances in the area of planted forest and promoted by governments and forest companies in partnership with rural farmers and communities. Considering the importance of subsistence crops and forest products to smallholders and consumers and the economic viability of agroforestry, attention is given in this paper to Outgrower Schemes that combine tree planting with agroforestry, to contribute to food security and environment preservation in developing countries. The issue of Outgrower Schemes through integrated crops-tree systems was raised in a previous study of Outgrower Schemes in Brazil, commissioned by the FAO1. This paper examines, based on the research done for that study, the views and perspectives of the companies＇ personnel, the tree growers that participate in the programs studied, and other stakeholders＇ related institutions involved in such schemes with regard to the promotion of Outgrower Schemes through integrated crops-tree systems, linking them with agroforestry, which is a way those Outgrower Schemes can contribute to food security and environment preservation goals.
文摘Green buildings should be sustainable, efficient, economical, and to improve the quality of life of users and nearby residents. Unfortunately, some architecture features fostered by energy and environmental certifications do not comply with fire prevention codes. Several factors can influence a building＇s energy efficiency and fire safety, such as bigger or smaller glass areas, building material thermal inertia, and the use of sustainable solutions such as green roofs. In this work, a methodology for integrating energy efficiency and fire prevention in green buildings is presented. A case study comparing a full glass skin and a building with 40% window size is considered. Also, the methodology permits modifications for obtaining a safe and energy efficient building.
文摘Concerning the integration of large-scale wind power,an integrated model of generation and transmission expansion planning is proposed based on the assessment of the value of steady state and dynamic security.In the assessment of security value,the unit commitment simulation based on the predicted hourly load and wind power output data in the planning horizon is used to evaluate the costs of preventive control,emergency control and social losses due to the uncertainty of load and wind power.The cost of preventive control consists of the fuel cost of power generation,the environmental cost and the load shedding cost.This not only provides a systematic method of security assessment of power system expansion planning schemes,but also broadens the perspective of power system planning from the technology and economic assessment to the measure of the whole social value.In the assessment process,the preventive control and emergency control of cascading failures are also presented,which provides a convincing tool for cascading failure analysis of planning schemes and makes the security assessment more comprehensive and reasonable.The proposed model and method have been demonstrated by the assessment of two power system planning schemes on the New England 10-genarator 39-bus System.The importance of considering the value of security and simulating hourly system operation for the planning horizon,in expansion planning of power system with integration of large-scale wind power,has been confirmed.
