Small hydropower systems have emerged as an attractive solution for areas with low head and flow rates, offering versatility for implementation in diverse locations such as rivers and wastewater treatment plants. This research specifically focuses on exploring the potential of small hydropower generation within wastewater treatment plants. Through the utilization of computational fluid dynamics (CFD) analysis, the study successfully predicted the torque and power generation capacity of the installed turbine. The analysis underscored the effective control of fluid flow achieved through careful turbine design, including considerations of blade shape and quantity. For instance, in the case of the Tancheon wastewater treatment plant, the study revealed the ability to generate a torque of approximately 7000 Nm, translating to an estimated power production of around 48.3 kW per hour. Ultimately, this research significantly contributes to evaluating the feasibility and viability of small hydropower generation within wastewater treatment plants.

目前IT产业已逐渐成为中国的中心产业。通过近几年的急速增长，已经成为颇具规模的产业。产业技术的进步以及激烈的市场竞争导致IT产业的价格下降，因此实现了各部门以更低的成本来实现信息化，普通消费者也可以更低的价钱来购买IT产品。 但是在全球产业价值链中，中国的电子信息产业总体上处于中低端，而且中国生产的很多电子产品都是附加值较低的产品，因此经济效益没有出现其规模的扩大相匹配的增长。因此，电子信息产业的健全的发展和质的增长、以及提高经济效益成为中国电子信息产业面临的最迫切的问题。为此，中国政府也在“十一五规划”期间，努力做好电子信息产业的质的增长。 尽管如此，总体上来看中国的电子信息产业实现产业结构升级和提高竞争优势还需要一段时间。外资企业在中国电子信息产业中所占主导地位以及电子信息产业实现的大量就业人口，提高了中国电子产品在世界市场中所占的份额以及促进了出口产品的产业升级。另一方面，也使中国成为劳动密集型的加工基地，不利于中国国内企业培育长期的发展潜力。 中国人民大学的刘瑞教授曾经指出，中国今后为了实现年均7%以上的经济发展速度，就必须要解决落后的技术问题。并且强调，如果中国自身没有自己的技术积累，中国将永远不能逃脱生产技术部门的其他技术强国的控制。 但通过合并来引进国外先进技术、研发投资的急速增加、中国国内企业获得国内外专利申请的增加、培育理工专业的优秀人才等意味着中国的电子信息产业技术力量正在快速提高，因此，不能过低的评价中国电子信息产业。从这一点上，中国目前还不是我们的威胁，但也有可能会成为未来的威胁。

Tomatoes are considered as one of the main components of daily meals in most households. Thus, it is important to invest in studies enhancing their yield and nutritional value. The study evaluated the effect of wood vinegar (WV) on tomato under greenhouse conditions. Data on fruit number, fruit weight, and plant height were recorded. Total phenolic content (TPC) and antioxidant activity of tomato were determined using the Folin-Ciocalteu reagent and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, respectively. FRR-CF+500x-WV significantly increased the fruit number (86.11%) and fruit weight (81.78%) over the control. Results were comparable to HRR-CF+250x-WV, indicating that conventional fertilizer and WV may have synergistic effect on each other. TPC and scavenging effect on DPPH radical was improved by 250x-WV application. The increase in the phenolic compounds can be attributed to WV as a direct source or as a factor triggering the plants to produce more secondary metabolites with the purpose of increasing natural defenses. The significant effect obtained by applying the full recommended rate of conventional fertilizer on the carotenoid content was due to the availability of the major nutrients needed by the plant. Correlation analysis showed that carotenoids have negative correlation with TPC and DPPH. However, TPC and DPPH showed that these are positively correlated with each other. Tomatoes are excellent source of antioxidants associated with the reduction of some human diseases and improved health. The results provided evidence that WV alone and/or its combination with conventional fertilizers has favorable effects on the quality of tomato.

The research on potential energy was conducted to conserve the high-exergy energy like primary energy and utilize waste heat from sewage. From the point of view in using the waste heat, the energy potential of waste water from the model house was simulated. From the results,when the heated water was supplied to the model house side in order to put unused energy to practice use, heated water had higher energy potential than unheated water, which was due to the discharge of most of unused energy. The possessing heat capacity of sewage from heated water was increased to 40-70 percents in comparison with that from the unheated water. Therefore, it can be used as energy source for improving coefficient of performance of heat pumps. By adopting the multiple heat pump into a model house, It showed that the possessing heat capacity of sewage was reduced. It was also found that the heat was recovered as energy source for multiple heat pump in a model house.

우리나라 벼 재배품종들의 천립중을 증대시켜 단위면적당 수량능력의 향상을 위한 기초자료를 얻고자 수집된 몇가지 대립종들의 수량성 및 주요특성을 소개하고자 시험한 결과 1. 벼알의 무게와 벼알의 길이, 너비, 두께는 유의한 정(+)의 상관을 보였으며 벼 알의 길이와 모양은 정(+)의 상관(r=0.5707 ~ast~ast)을 보였다. 2. 우러나라 재배품종의 천립중보다 무거온 14대립종들의 천립중과 수당입수, 주당수수, 등숙비율, 총건물중, 정조중, 수확지수간에는 부(-)의 상관을 보였으나 유의성은 인정되지 않았다. 3. 이들 대립종의 천립중과 생육일수와는 부(-)의 상관을 보였으나 유의성은 인정되지 않았다. 4. 천립중이 상이한 20품종의 천립중과 심복백정도간에는 정(+)의 높은 유의 상관(r =0.8477~ast~ast)이 인정되었다.