• (The)Study of the Eastern Classic
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• no.48
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• pp.225-252
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• 2012

In this paper, the writer examined the procedural changes of Zhuzi(朱子)'s theory of ZhongHe(中和), and also investigated the evaluations thereof made by the later generations. In the stage of ZhongHeJiuShuo(中和舊說), Zhuzi(朱子) ignored the theory of Lidong(李?), which was traditional theory argued by DaoNam School(道南學派). He met Zhangshi(張?) of HuXiang School(湖湘學派) and followed the school's philosophy, 'XianChaShiHouHanYang(先察識後涵養)', meaning what you should do first prior to making great efforts in self-cultivation is to examine the past, when desiring to know yourself. Even though Zhuzi(朱子) had learned the method of moral cultivation from Lidong(李?), he was fascinated by such method of moral cultivation as 'XianChaShiHouHanYang(先察識後涵養)' advocated by HuXiang School(湖湘學派) through discussion with Zhangshi(張?). This tells that he only recognized the fact that there were no achievements WeiFa(未發), but only the achievements YiFa(已發). In the stage of ZhongHeXinShuo(中和新說), he realized the mistakes committed in the time of ZhongHeJiuShuo(中和舊說), and put emphasis upon the achievements in the time WeiFa(未發). Zhuzi(朱子) had explained the relationships among mind, nature, and emotional bond as by his theory, 'XinTongXingQing(心統性情)', meaning that mind controls humans' original nature. Also he followed self-cultivation of Respect, no longer believing the Huhong(胡宏)'s XianChaShiHouHanYang(先察識後涵養). Such a method of self-cultivation means that his method of moral cultivation centered on the achievements YiFa(已發), which was originated from HuXiang School(湖湘學派), had been changed into the method of moral cultivation with a focus on the achievements WeiFa(未發), which was theory argued by DaoNam School(道南學派). However, Zhuzi(朱子)'s theory of ZhongHe(中和) that had seemed perfect began to be discussed and polished again during Joseon Period through the debates between Ligu(栗谷) and Niuxi(牛溪) in the 16th century, and through the debates between Youan(尤庵) and Yuxuan(寓軒) in the 17th century, also through the HuLuoLunZheng(湖洛論爭) represented by Nantang(南塘) and Weiyan(巍巖). Since Zhuzi(朱子)'s theory of ZhongHe(中和) had some flaws, it had to put through such debates as mentioned above. Those debates were generated because imperfections were found in the theory of ZhongHe(中和) by Zhuzi(朱子).

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.15 no.5
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• pp.97-107
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• 2001

Many power plants in the thermal and hydraulic utilities, the pulp and the paper industry are faced with high maintenance and down time due to the aged excitation system. For the life extension of the aged power plants, the static excitation system of triple module redundancy type had been developed by KEPRI(Korea Electric Power Research Institute). This paper will discuss the design conception and the application results of system which includes the power control devices(thyristors, GTO), power potential transformer(excitation transformer) and triple module redundancy controller(voltage regulator).

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.255-256
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• 2003

강수의 대표적인 산성 오염물질은 주로 화석연료의 연소 과정에서 발생하는 황산화물과 질소산화물이며 이들을 강한 산성물질로 전환시키는 과정에서 오존, 과산화수소, 과산화물, 탄화수소 등이 크게 기여하고 있다. 이외에도 유기산, MSA 등이 강수의 산성화에 기여하고 있으나 이들의 기여도는 대체적으로 황산화물과 질소산화물에 비해 비교적 낮다. 반면에 암모니아나 토양의 칼슘화합물 등의 염기성 물질들은 강우의 산성 물질을 중화시키는 역할을 하는 것으로 조사되고 있다. 특히 토양입자에 의한 중화과정은 최근 빈번해진 황사의 영향 때문에 조사의 필요성이 크게 부각되고 있다. (중략)

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.8 no.2
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• pp.342-342
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• 1998

The effect of pH on the dehydration reaction of TiCl₄solution. KOH and HCl were used as a accelerater and retarder in dehydration. Results are follow. Neutralization point is pH 7.4 in the system of $TiCl_4-KOH$ and the production which is produced at acidic side is Ti-gel of poly metatitanic acid. The production which is produced at alkalic side is aligomer and crystalline potasium titanate is not detected.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.285-286
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• 2012

실험의 주된 목적은 가설의 검증에 있다. 그 중에서도 화학 실험은 다른 실험보다 위험도가 높을뿐더러 소모성 약품이 많고 실험을 할 장소도 마련되어야 하며 실험할 기구 또한 준비가 제대로 되어 있어야 한다. 또 미세한 실수라든지 실험하는 과정이나 방법을 약간만 다르게 해도 결과가 얼마든지 다르게 나올 수 있는 실험이 바로 화학실험이다. 그렇기 때문에 화학 실험에 있어서 충분히 과정과 방법을 숙지해 실험에 임해야 한다. 본 논문에서는 화학 실험 중에서 중화 반응 실험의 과정과 방법을 미리 시뮬레이션을 통해 숙지할 수 있는 프로그램을 제안한다.

• Applied Biological Chemistry
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• v.9
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• pp.71-81
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• 1968

Defatted rice bran is mixed with diluted acid solution, the mixture is agitated some hrs. at constant temparature. After the mixture is filtered, thus filtrate is obtained. This filtrate is phytin extract solution. (Test-1) The alkali is added to this filtrate and filtered out, then the precipitation of phytin is obtained. (Test-2) At the test-1, the effect of kind of acid, conc. of acid, amount of extract sol'n., time of extraction, temp. of extraction, to the extract amount of phytin is tested. Consequently, the following facts are known. 1. Amount of phytin extract is greater HCI extraction than $H_{2}SO_4$ extraction. 2. At 0.3% HCI, the amount of phytin extract is greatest of all HCl extraction. 3. The sufficient amount of acid solution is 8-10 times of amount of defatted rice bran. 4. The time of extraction at room temperature is sufficient 8-12 hrs. 5. When extract temperature is $20-30^{\circ}C$, the amount of phytin extraction is greater of all temp. 6, When defatted rice bran 20 g is shanken with 160 ml of 0.3% HCl for 10 hr. at room temp., in this case the amount of phytin extract is 11.34% of defatted rice bran, it is 93% of theoretical yield. At the test-2 the effect of kind of precipitation agent, degree of nutralization to the amount of phytin prcipitation is tested. 1. Degree of nut. is best at pH 6.8-7.0. 2. When use of $Ca(OH)_2$ the amount of phytin precipitation is more than use of KOH, NaOH, or $NH_{4}OH$. 3. At pH 6.0-7.2, the solubility of phytin is followed. K-phytate > $NH_{4}-phytate$ > Na-phytate > Ca-phytate 4. When phytin extract solution is nutralized with $Ca(OH)_2$ to pH 7.0, the amount of phytin precipitation is 94.78% of theoretical yield.

• Korean Journal of Soil Science and Fertilizer
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• v.7 no.3
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• pp.185-191
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• 1974

Incubation and pot studies were conducted with upland soils for a study on determination of the lime requirement based on exchangeable alumium content. The results obtained are as follows; 1. Results of chemical analysis of upland soils show that pH varies from 5.0 to 5.4, and exchangeable Al moves with the range of 1.3-3.0m.e/100gr. Exchangeable Al decreases with years of cultivation. 2. Incubation studies shows that on acid mineral soils almost all exchangeable Al, on average 95% was neutralized with the lime to neutralized 100% exchangeable Al. On volcanic ash soil, however, only 65.5% was neutralized with the lime estimated to neutralize the equivalent of 200% exchangeable Al. The latter has required more lime. 3. The pH of mineral soils is on the average increased from an initial 5.2 to 6.3 when 95% of exchangeable Al is neutralized, whereas that on volcanic ash soil is increased from an initial 5.3 to 5.5 only when lime is applied at rate to neutralize the equivalent of 200% exchangeable Al. 4. A high correlation coefficient (r=0.99) was obtained between exchangeable Al and exchangeable acidity. This indicates that exchangeable acidity is primarly a result of exchangeable Al. 5. In pot experiments with soybean cultivated on one of the hill land soils (Songjoong soil) the application of fused phosphate and triple superphosphate based on a 5% saturation rate ($P_2O_5$ 32.1 kg/10a) showed that the liming factor for calculation of the optimum lime requirements based on exchangeable acidity was 0.594 for fuses phosphate or 1.132 for tripple superphosphate, and optimum pH is approximately 6.0 and optimum neutralization rate of exchangeable Al is 80-90%.

• Journal of The Korean Association For Science Education
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• v.31 no.6
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• pp.864-875
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• 2011

The purpose of this study was to investigate high school students' understanding of acid-base related concepts using three different titration technologies. The test population was composed of 209 students from three classes in the 10th grade. The different titration experiments using indicator, or pH-meter or MBL were performed in each class unit, respectively. The analyses of the effect on the understanding of different titration technologies were carried out by comparing the mean scores of the concept test taken before and after the titration for the three groups. The results of the acid-base related concept test indicated that statistically significant effects on the understanding of the concepts were shown by all groups. Comparing the effect on the comprehension of the three groups, the MBL group showed the most significant effect, while the pH-meter group showed the least significant. It was also attempted to analyze the effect on comprehension of the concepts by the cognitive and the motivational levels of students. This study revealed that the students in the formal operation stage showed higher understanding of the acidbase related concepts, while those in the concrete operation stage showed lower comprehension. It was also shown that the students at the active motivational level scored higher in comprehension than those who had a low score. The results of this study implied that each group showed differently enhanced comprehension of concepts by titration technologies. Therefore, teachers need to promote an appropriate experiment technology for the cognitive and motivational levels of students as well as try to help students express freely their own perspectives.

• 발명특허
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• v.4 no.2 s.36
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• pp.21-23
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• 1979

• 레미콘
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• no.4 s.47
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• pp.118-126
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• 1996