It was billed as a major disaster film about a serious subject. The movie The Day after Tomorrow describes the effects of global warming at a breathtaking pace. Global warming triggers the collapse of the Antarctic ice sheet beneath a team of polar scientists. In chain-reaction-like consequences, the collapse sends a 100-foot tsunami across Manhattan before the city is frozen in ice. Super-torn...

Abstract. Multisensor data fusion technology is a new frontier technology. According to the demand of greenhouse environment monitoring, the paper puts forward a new kind of data fusion method based on Dempster-Shafer (D-S) evidence theory and agricultural expert system. The experimental results show that the method can improve the veracity of decision of measuring and controlling greenhouse en...

In this case study we present the design of a functional prototype of an intelligent hydroponic greenhouse that allows to grow fruits, like tomato, at any time of the year, manipulating specific variables such as temperature and humidity of the microclimate inside the greenhouse. The objectives of the present case study are to analyze the parts that compose the prototype as it is the structure ...

Continuously Heated Greenhouses: A production or retail greenhouse with a constantly maintained temperature of 50 degrees F or more during winter months. Such greenhouse must also have a maintenance attendant on duty at all times or an adequate temperature alarm system to provide warning in the event of a heating system failure. In addition, the greenhouse roof material must have a thermal resi...

Greenhouse automation is one of the main advances in modern agriculture, this subject being included in many agricultural engineering and applied control curricula. This study presents the development of a web-based remote control laboratory using a greenhouse scale model for teaching greenhouse climate control techniques using different hardware and software platforms. 2005 Wiley Periodicals, ...

1) there is a natural greenhouse effect that keeps the world warmer than it otherwise would be; 2) greenhouse gases are increasing in the atmosphere because of human activities and they are trapping increasingly more heat; 3) there is a collective picture of a warming world and humans have likely contributed; and 4) continued increase in greenhouse gases is projected to lead to increases in sea...

Accounting for transportation is an important part of the life cycle analysis (LCA) of beef cattle production because it is associated with energy consumption and greenhouse gas emissions. This paper describes the development and application of a model that estimates energy consumption and greenhouse gas emissions of transport in beef cattle production. The animal transport model is based on th...

Shading the greenhouses is necessary in summer to reduce the solar radiation load. This however generates a considerable amount of thermal radiation heat load that needs to be removed via cooling systems. This study aimed to evaluate the effect of different shading configurations on the solar and thermal radiation in a greenhouse. Nets at four different locations were employed to shade the roof...

Greenhouse farmers are exposed to many risk factors during work. This paper characterized the risk factors and discussed their health impacts among greenhouse farmers. Risk factors under greenhouse conditions emerged from pesticide application and greenhouse gas emission from soil during day. Risk factors among farmers were determined by recording toxicity symptoms, acute and chronic obstructiv...

Conventional methods used for solving greenhouse environment multi-objective conflict control problems lay excessive emphasis on control performance and have inadequate consideration for both energy consumption and special requirements for plant growth. The resulting solution will cause higher energy cost. However, during the long period of work and practice, we find that it may be more reasona...