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This study was conducted to develop a heat pump system to utilize waste heat within the greenhouse during the daytime in winter season. The system runs at 8 am to 6 pm for the heat storage operation, and from 6 pm to 8 am of the next day for the heat radiant work. In the case of the heat storage operation, the average solar radiation was with outside temperature. The of the system shows 4.59 in this operation mode. When the temperature goes up to , the system reached at 5.10. On the other hand, the of the system in heat radiation mode shows 2.63. In this case, the inside of the greenhouse temperature was reaches at when the outside temperature was .

The goal of this paper is to report on the preliminary findings about the effects of Computer-Supported Collaborative Learning (CSCL) in STEM education. A statistical meta-analysis was conducted to synthesize research findings published from 2005 and 2014. A preliminary findings based on 198 outcomes from 80 studies indicated an overall effect size of .53, a moderate but nonetheless impressive effect size in educational research. Although not all significant, effects of CSCL varied across a number of moderator variables such as types of technology, learner levels, and study settings. The analyses are ongoing, but the findings clearly demonstrate the benefit of CSCL in STEM education. Further examinations are underway in order to understand the conditions under which CSCL is most effective.