• 대한지구과학교육학회지
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• 제7권1호
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• pp.43-53
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• 2014

이 연구의 목적은 계절의 변화 원인을 설명하는 과정에서 초등학생들의 개념 시뮬레이션을 분석함으로써 학생들이 어떻게 계절의 변화 원인에 대한 설명을 어떻게 생성하고 있는지를 알아보고, 계절의 변화와 관련된 교육에 시사점을 주는 데 있다. 이를 위해 문헌 연구를 기반으로 개념 시뮬레이션 과정 및 전략 분석틀을 개발하였으며, 과학교육 전문가 4인의 내용타당도를 확인 받았다. 연구의 결과는 다음과 같다. 첫째, 계절의 변화 원인 설명 과정에서 초등학생들은 주로 과학수업에서 모형 실험을 통해 학습한 지각적 경험을 이용하여 설명을 만들고 있었으며, 친숙한 대상을 이용하여 사고실험 사례를 고안하거나, 친숙한 지각적 경험을 유추하여 설명을 확고히 하는 것을 돕고 있었다. 둘째, 개념 시뮬레이션 사례의 실수는 초기표상의 진술, 심상 시뮬레이션의 실행 과정에서 나타났으며, 참여자들의 초기표상 진술이 불완전하거나, 심상 시뮬레이션 실행에서 부적절한 상황을 떠올린 경우였다. 셋째, 초등학생들의 개념 시뮬레이션 과정에서 남중고도의 개념과 관련된 정신모델을 확고히 하기 위해 제거, 대체의 시뮬레이션 전략을 사용하는 것을 확인하였다.

• 한국재료학회지
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• 제30권6호
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• pp.301-307
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• 2020

In this study, factors considered to be causes of promotion of densification of sintered pellets identified during phase change are reviewed. As a result, conclusions shown below are obtained for each factor. In order for MA powder to soften, a temperature of 1,000 K or higher is required. In order to confirm the temporary increase in density throughout the sintered pellet, the temperature rise due to heat during phase change was found not to have a significant effect. While examining the thermal expansion using the compressed powder, which stopped densification at a temperature below the MA powder itself, and the phase change temperature, no shrinkage phenomenon contributing to the promotion of densification is observed. The two types of powder made of Ti-silicide through heat treatment are densified only in the high temperature region of 1,000 K or more; it can be estimated that this is the effect of fine grain superplasticity. In the densification of the amorphous powder, the dependence of sintering pressure and the rate of temperature increase are shown. It is thought that the specific densification behavior identified during the phase change of the Ti-37.5 mol.%Si composition MA powder reviewed in this study is the result of the acceleration of the powder deformation by the phase change from non-equilibrium phase to equilibrium phase.

• 혜화의학회지
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• 제13권2호
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• pp.337-345
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• 2004

Using aged Wistar rat living body change by aging CheongSimYeonJaTang was each orally administrated and achieved research about aging control. In Wistar rat 10, 30, 50 week and 40 week CheongSimYeonJaTang between 10 weeks form condition change of weight, change of intestine weight, hematology, blood chemistry, research result about serum content following conclusion get. 1. Observed gain in weight than control group form of CheongSimYeonJaTang to aged Wistar rat. 2. Is thought to promote activation of living body action gaining intestine weight along with gain in weight. 3. Displayed decrease of MDA's content of serum than control group form of CheongSimYeonJaTang to aged Wistar rat. 4. Change that is Wistar rat's hematological value by aging according to 10, 30, 50 week WBC, RBC, Hgb, monocytes, eosinophil etc. increase, and HCT, PLT etc. showed tendency that decrease according to old-week, and observed improvement that is hematological value than control group form of CheongSimYeonJaTang. 5. Change that is Wistar rat's biochemical value by aging was measured highest in 50 week because ALT, AST, BUN, CRN, T-bili., T-chol, TG, TP, ALB, A/G, P etc. increase according to 10, 30, 50 week, and observed improvement that is biochemical value than control group form of CheongSimYeonJaTang. Is considered by being effect that CheongSimYeonJaTang living body function decline by aging by this result.

• 기독교교육논총
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• 제62권
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• pp.285-311
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• 2020

최근 코로나 19 전염병의 확산을 비롯해 다양한 위기들로 인해 수많은 사람들이 경제적인 어려움을 겪는 가운데 기독교교육은 어떤 역할을 수행할 수 있을지를 고민하는 과정 속에서 본고는 구약의 희년사상에 초점을 맞춰 현대적 맥락에서 주빌리 정의가 어떻게 구현될 수 있을지를 모색한다. 희년법은 노예해방과 부채면제, 토지반환과 휴경의 네 가지 내용으로 구성되어 있으며, 궁극적으로 인간의 노예화를 막고 평등을 보존하려는 데 그 주된 목적이 있다. 그럼에도 불구하고, 희년사상은 그동안 신학적으로나 상황적으로 왜곡되어 기독교교육의 현장에서 간과됨으로써 사회정의를 위한 기독교적 실천에 있어서 한계가 존재했다. 하지만 희년사상은 기독교의 사사화 문제라든지, 신자유주의적 세계화로 인한 양극화의 심화 등 현대 사회의 다양한 문제들을 극복할 수 있게 하는 한 가지 대안이 될 수 있으며, 사회정의를 실천하는 데 긍정적인 기여를 할 수 있다. 즉, 희년사상은 제도적 차원에서 잘못된 법률과 제도를 개혁하며 가난한 사람들을 위한 제도를 확립하는 데 있어서, 또한 개인적 차원에서 공유경제의 실천 및 인식 변화의 측면에 있어서 성서적 모티브로 작용할 수 있다. 이처럼 가난으로 고통 받는 사람들을 위한 주빌리 정의를 지향하는 주빌리 교육은 다양한 간학문적인 지식들을 토대로 하여 인식적 차원으로는 기존의 잘못된 통념을 깨뜨림으로써 학습자들의 의미관점의 전환을 돕고, 실천적 차원에서는 사회구조의 변화를 위해 여론의 활성화 등 사회적 행동을 지원한다. 이로써 기독교교육의 학습자들이 불의한 사회를 변혁하기 위한 공적 역할을 책임 있게 수행할 수 있기를 기대한다.

• 대한한의학원전학회지
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• 제20권4호
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• pp.251-265
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• 2007

This study is a research on the etiology in Wu Youke's wenyi theory. In regard to the etiology of epidemic disease that had been spread on a very large scale at that time, Wu Youke denied the traditional theory which urged the irregular change of climate as the cause of epidemic disease, and proposed the concept of 'zaqi' which was considered by him to be something that could be the real cause of epidemic disease. And He treated the wenyi disease as something that has the same meaning with wenbing, so his concept on wenbing was basically the thing that treats 'zaqi' as the fundamental cause of wenbing and treats the concept of 'wen(溫)' as an environmental cause that could help activate the virulence of 'zaqi'. Such concept like this was the thing somewhat different from the traditional etiological theory that considers the change of climate as the principal cause of waigan(外感)-disease, and it must for the most part have been originated from the experience of Wu Youke himself. But this study, in contrast, based on the thing he denied the traditional theory on the irregular change of climate, has been done in the point of view that fundamental concept of his wenyi theory such as 'zaqi' was not only originated from his clinical experience but also from the influence of paradigm shift in the natural philosophy of that time. There had been so much change in cosmology and natural philosophy from the fundamental basis at that time, and the the most principal concept of it was that there always exists irregular faces in the change of nature. Such concept like this got into its stride from about 17th century, and it was expressed in the form of the severe criticism against the traditional natural philosophy. In regard to this, this study has outlined the academic thought of the leading scholars who made a significant progress in such a paradigm shift, and it includes the scholars like Wang Tingxiang, Wang Fuzhi, Hu Wei, Huang Zongxi, who played their role in the time of the latter period of Ming dynasty and the former period of Qing dynasty.

• 대한치과보철학회지
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• 제37권2호
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• pp.256-268
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• 1999

Submerged implants require secondary surgical uncovering of implants after healing period of 3-6 months. In surgical methods, there are surgical scalpel, tissue punch, electro-surgical, and laser-used uncovering, and so forth The objectives of this study are investigation and assessment of 1) thermal change in clinical application for uncovering of HA-coated implant and pure titanium implant irradiated by pulsed Nd-YAG, $CO_2$, and Er-YAG laser. 2) surface change of cover screws aaer irradiation using laser energy. The temperature of apex & side wall of implants were recorded at 10sec, 20sec, 30sec after 30sec irradiation to implant healing screw; 1) pulsed Nd-YAG laser; 2W, 20pps, contact mode 2) $CO_2$ laser; water-infused & non-water infused state, 2.5-3.5W, contibuous mode, noncontact mode 3) $CO_2$ laser ; non-water infused state, 3W, superpulse, noncontact. mode 4) Er-YAG laser; (1) non-water infused state, 10pps, 60mj, contact mode (2) water-infused state, 10pps, 60mj, 80mj, 101mj, contact mode. According to the results of this study, pulsed Nd-YAG laser is not indicated because of increased thermal change and pitting of metal surface of implant cover screw. By contrast, $CO_2$ laser & Er-YAG laser are presumed to indicate because of narrow range of thermal change & near abscence of thermal damage of metal surface. Dental laser is thought to be much helpful to surgical procedure when it is used as optimal power and time condition considering characteristics and indications of each laser. Further research is needed to verify that these techniques are safe and beneficial to implant success.

• 사상체질의학회지
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• 제17권2호
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• pp.74-84
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• 2005

1. Objectives The purpose of this study is to find out effects of Choeongsimyeonja-tang and Taeumjowi-tang on the against decline of physical function as aging. 2. Methods In Wistar rat 10, 30, 50 week and 40 week Choeongsimyeonja-tang & Taeumjowi-tang between 10 weeks form condition change of weight, change of intestine weight, hematology, blood chemistry, research result about serum content following conclusion get. 3. Results and Conclusions 1. Observed gain in weight than control group form of Cheongsimyeonja-tang & Taeumjowi-tang to aged Wistar rat. 2. Is thought to promote activation of living body action gaining intestine weight along with gain in weight. 3. Displayed decrease of MDA's content of serum than control group form of Cheongsimyeonja-tang & Taeumjowi-tang to aged Wistar rat. 4. Change that is Wistar rat's hematological value by aging according to 10, 30, 50 week WBC, RBC, Hgb, monocyces, eosinophil ere. increase, and HCT, PLT ere. showed tendency that decrease accorcling to old-week, and observed improvement that is hematological value than control group form of Cheongsimyeonja-tang & Taeumjowi-tang.5. Change that is Wistar rat's biochemical value by aging was measured highest in 50 week because ALT, AST, BUN, CRN, T-bili., T-chol., TG, TP, ALB, A/G. P ete. increase according to 10, 30, 50 week, and observed improvement that is biochemical value than control group form of Cheongsimyeonja-tang & Taeumjowi-tang. Is considered by being effect that Cheongsimyeonja-tang & Taeumjowi-tang living body function decline by aging by this result.

• 대한화학회지
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• 제52권2호
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• pp.186-196
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• 2008

연구에서는 고체와 기체의 용해에 대한 대학생들의 열역학적인 이해 정도를 조사하였다. 연구 대상은 서울 지역 대학교 3학년 학생 34명이며, 용해 개념 검사지를 사용하였다. 검사지는 고체 염화나트륨과 기체 이산화탄소가 물에 용해될 때 각각의 엔탈피 변화, 엔트로피 변화, 온도에 따른 용해도 변화를 물어보는 6개의 문항으로 구성하였다. 검사지 응답을 분석한 결과 용해시 엔탈피 변화에 대한 학생들의 이해 정도는 높지 않았으며 많은 학생들이 고체 용해에 대해 용질-용매간 인력이 용질-용질간 인력보다 커야 용해가 일어난다고 생각하여 발열 과정으로 응답하였고, 또 용해가 자발적으로 일어나기 위해서는 엔탈피가 감소해야 한다고 생각하여 변화의 자발성이 엔탈피 변화에만 의존하는 것으로 생각하고 있었다. 용해시 엔트로피 변화에 대해서는 엔탈피 변화보다는 이해 정도가 높았으며 대부분 무질서도의 개념으로 이를 설명하였다. 온도에 따른 용해도 변화에 대해서는 대부분 그 방향에 대해서는 옳은 응답을 하였으나 이를 엔탈피 변화와 관련지어 설명한 학생은 25%정도밖에 되지 않았는데, 용해시 엔탈피 변화의 부호를 잘못 인식한 학생들은 올바른 설명을 할 수 없었기 때문이다.

• 혜화의학회지
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• 제13권2호
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• pp.317-326
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• 2004

Administrating PalMoolGoonJaTang and SipIMiGwanJungTang to 40-weeks-(old Wistar rat for 10 weeks so, I researched into weight change, weight change of internal organ, and hemtological and serological changews. Then I got these conclusions. 1. Observed gain in weight than control group form of SipIMiGwanJungTang to aged Wistar rat. 2. Is thought to promote activation of living body action gaining intestine weight along with gain in weight. 3. Displayed decrease of MDA's content of serum than control group form of SipIMiGwan JungTang to aged Wistar rat. 4. Change that is Wistar rat's hematological value by aging according to 10, 30, 50 week WBC, RBC, Hgb, monocytes, eosinophil etc. increase, and HCT, PLT etc. showed tendency that decrease according to old-week, and observed improvement that is hematological value than control group form of SipIMiGwanJungTang 5. Change that is Wistar rat's biochemical value by aging was measured highest in 50 week because ALT, AST, BUN, CRN, T-bili., T-chol., TG, TP, ALB, A/G, P etc. increase according to 10, 30, 50 week, and observed improvement that is biochemical value than control group form of SipIMiGwanJungTang As those results, PalmoolGoonJaTang and SipIMiGwanJungTang are effective against dacline of physical function as aging. Moreover, considered to the serogical results, SipIMiGwanJungTang is much more effective than the other.

• 한국기후변화학회지
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• 제5권3호
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• pp.209-218
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• 2014

In this study, the researchers have developed the greenhouse gas emission coefficients targeted at sewage sludge incineration plants that treat sewage sludge by incineration. Among the gases emitted from the sewage sludge incineration plants, the greenhouse gases showed concentrations of 6.84% for $CO_2$, 4.51 ppm for $CH_4$, and 86.34 ppm for $N_2O$; calculated into greenhouse gas emission coefficients, these gave $276.06kg\;CO_2/ton$, $0.0066kg\;CH_4/ton$, and $0.35kg\;N_2O/ton$. As the result of calculating the greenhouse gas emission quantity in sewage sludge incineration plants using the greenhouse gas emission coefficients, the gross greenhouse gas emission was $84.63ton\;CO_2\;eq./day$, and the net emission was $23.90ton\;CO_2\;eq./day$; this was $37.52ton\;CO_2\;eq./day$ less than the net greenhouse gas emission that was calculated using the standard values of IPCC, which was $61.42ton\;CO_2\;eq./day$. This difference is probably because unlike the standard values of IPCC, the greenhouse gas emission coefficients of this study reflected the special properties of subject facilities. Thus, it is thought that emission coefficient research on the facilities that deviated from the standard values of IPCC should continue to achieve the development of national greenhouse gas coefficient that reflects the special properties of Korea.