섬유보강 다공성 옥상녹화 황토콘크리트의 물리·역학적 및 온도변화 특성 평가

오리온,김춘수,김황희,전지홍,권완식,박찬기,Oh, Ri On,Kim, Chun Soo,Kim, Hwang Hee,Jeon, Ji Hong,Kwon, Wan Sig,Park, Chan Gi 한국농공학회 2013 한국농공학회논문집 Vol.55 No.4

The physical, mechanical, water purification and temperature properties of fiber reinforced porous hwang-toh green roof concrete have been evaluated in this study. The effect of the depending on replacement ratio of blast furnace slag to cement was investigated such that the replacement ratio is varied to 0 % and 30 %. Also, the replacement ratios of hwang-toh were 0, 20 and 30 %. The polyvinyl alcohol fiber was used for the reinforcing fiber. A series of pH test, unit weight, void ratio, compressive strength, after purification and variation of temperature test have been performed to evaluate the performance, water purification effect and temperature properties of the fiber reinforced porous hwang-toh green roof concrete. The test results indicate that the physical and mechanical properties of fiber reinforced porous hwang-toh green roof concrete is affected by the replacement ratio of the blast furnace slag and hwang-toh contents. Results of purifying water showed that the water purification effect of porous hwang-toh green roof concrete is about 40 %. Also, the temperature properties test results indicate the green roof blocks using fiber reinforced porous hwang-toh green roof concrete have insulation and temperature reduction effect.

A Decision Model for Advertising Expense: From the Perspective of the Blockholder's Private Benefits

Hwang,Joon-Ho,Chun,Se-Hak 한국상품학회 2009 商品學硏究 Vol.27 No.2

This paper examines how the size of private benefits of large owners, measured using block premium, affects changes in advertising expense of the company. If large owners enjoy private benefits through engaging in pet projects, it will result in increased advertising expense. On a sample of 130 firms whose blocks of shares are traded in the U.S., we show that the magnitude of private benefits is not associated with changes in advertising expense.

비소성 무기결합재를 사용한 무시멘트 다공성 식생콘크리트의 물리·역학적 특성 및 동결융해저항성 평가

김황희,김춘수,전지홍,박찬기,Kim, Hwang Hee,Kim, Chun Soo,Jeon, Ji Hong,Park, Chan Gi 한국농공학회 2014 한국농공학회논문집 Vol.56 No.5

The physical, mechanical and freezing and thawing properties of non cement porous vegetation concrete using non-sintering inorganic binder have been evaluated in this study. Four types of porous vegetation concrete according to the binder type is evaluated. The pH value, void ratio, compressive strength, repeated freezing and thawing properties were tested. The test results indicate that the physical, mechanical and repeated freezing and thawing properties of porous vegetation concrete using the non-sintering inorganic binder is increased or equivalent compared to the porous vegetation concrete using the blast furnace slag + cement and hwang-toh + cement binders. Also, Vegetation monitoring test results indicate the porous vegetation concrete using the non-sintering inorganic binder have increasing effects of vegetation growth.

반응표면 분석법을 이용한 천연마섬유보강 순환굵은골재 콘크리트의 성능 평가

전지홍,김황희,김춘수,유성열,박찬기,Jeon, Ji Hong,Kim, Hwang Hee,Kim, Chun Soo,Yoo, Sung Yeol,Park, Chan Gi 한국농공학회 2014 한국농공학회논문집 Vol.56 No.4

In this study, evaluated ware the strength and durability of the vegetated water purification channel concrete to which recycled aggregates, hawang-toh and jute were applied. Box-Behnken method of response surface analysis in statistics was applied to the experimental design. Experimental variables are as follows, recycled coarse aggregates, hawang-toh, blast-furnace slag and jute fiber. In the experiment, conducted were the tests of compressive strength, chloride ion penetration, abrasion resistance and impact resistance the replacement rate effects of the recycled aggregates, blast-furnace slag and hwang-toh on the performance of vegetated water purification channel concrete were analyzed by using the response surface analysis method on the basis of the experimental results. In addition, an optimum mixing ratio of vegetated water purification channel concrete was determined by using the experimental results. The optimum mixing ratio was determined to be in 10.0% recycled coarse aggregates, 60.0% blast-furnace slag, 10.1% hwang-toh and 0.16% jute fiber. The compressive strength, chloride ion penetration, abrasion rate, and impact number of fracture test results of the optimum mixing ratio were 24.1 MPa, 999 coulombs, 10.30 g/mm3, and 20 number, respectively.

지방자치단체 캐릭터 디자인 활용에 대한 연구

황춘필,이규옥 한국기초조형학회 2003 기초조형학연구 Vol.4 No.1

1996년 지방자치제가 실시되면서 각 지방마다 ‘지방재정자립’이라는 이름 하에 지역문화의 재고와 지역문화를 상품화하려는 노력이 대두되고 있다. 이제 지역은 국가의 종속물이 아닌 자치단체 그 자체로서 위상을 확고히 하여 모든 자치단체들의 경쟁시대에서 다양한 개혁이 이루어 져야 하겠다. 특히 지역문화를 상징하는 캐릭터 개발은 자치단체 구성원의 단합과 주인의식을 고취함과 동시에 사업으로도 연계되어 해당지역의 경제활성화를 위한 중요한 역할을 수행하고 있다. 본 연구는 현재 지역활성화의 중요성에 비추어 볼 때 지역의 욕구에 잘 반영되어 지고 지역민의 결속 및 화합과 지역 아이덴티티(identity)를 확립하기 위하여 개발 되어진 각 지방자치단체 캐릭터들의 활용현황을 조사 분석함과 동시에 시각언어로써 가장 효과적인 수단이라 할 수 있는 지자체 캐릭터의 명확한 플랜 및 활용 방안들을 제시하고자 한다. 올바른 지역활성화 정책으로 유출된 캐릭터는 지역주민의 동질감 제고와 지역이 미지를 외부에 특성있게 알려 새로운 가치를 창출시키는 핵심요소 (核心尿素)가 될 것이다. Operation of 1996 local culture and efforts to commercialized local culture are appearing under the name of independence of local finance. Now, local is not any more the substance of nation but is a self-governing community so vary revolutions are essential in the competitive age among self-governing communities. The local character is performing important task for active economy with giving unification of members and host consciousness and relating it to business. This paper suggests the clear plan and method to use local character that is the most effective method as visual language through analysis on each local characters that is invented to show local desire, found connection and unification of local members and establish local identity. The character that is invented as a policy for local activation will be the core factor to make new value with discretion of homogeneity between local members adn delivery of local image to the outside world.

ENHANCED HUMUS FORMATION IN A SUBSTRATE- CONTROLLED COMPOSTING REACTOR

황은주,김준수,전관수 대구대학교 환경기술연구소 2004 미래환경기술 Vol.1 No.1

A substrate-amended fed-batch composting of food waste was investigated and its effect on humus formation and cellulose decomposition were studied. Various substrates were added to the reactor in fed-batch mode while no additional feed was introduced into the other reactor for comparison. Active composting was prolonged by the amendment of substrate. Cellulose composition changed from initial value of 33.4% to 32.6% in conventional batch composting. Cellulose decreased to 30.2% in the substrate-amended, fed-batch composting. It decreased further to 24.2% when the amount of substrate amendment increased in the fed-batch composting. Humus formation was enhanced in the substrate-amended composting. Humic substances were produced more in the fed-batch composting (7.47% and 8.76%) as compared to conventional batch composting (7.12%). About 5% to 23% increase in humic substance was achieved in the fed-batch composting. It was confirmed that the substrate-amended, fed-batch composting improved the degradation of cellulose and the formation of humus.

신경세포이주장애질환을 가진 간질환자에 대한 수술 체험

황승균,정천기,오창완,이상건,지제근,김현집,한대희,이상복 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.3

Neuronal migration disorders(NMD's) are a rare group of development structural lesions characterized by disorganization of cortical architecture with aberrant columnar and laminar neuronal arrangement, often causing intractable seizures. During September 1994 to February 1995, we operated on six patients with NMD to treat intractable seizures. Male to female ratio of these 6 patients was 2 : 4, and mean age at seizure onset was 14 years old(range 6-28 years), indicating early onset of epilepsy. Mean age at seizure surgery was 29 years old(range 23-41 years), and mean follow-up duration after operation was 4 months(range 3-6 months). In their past medical history, three patients had experienced febrile seizure at pediatric age, and one of them had a history of anoxic damage during delivery. Following preoperative localization, the lesion was removed completely in five patients. In the other one patient, part of the lesion was located in the speech and motor area, leading to partial removal. On histologic examination two of them showed cortical dysplasia and the other four revealed microdysgenesis. During follow-up for six months, five patients were free of seizure and in the other one patient, whose lesion was removed incompletely, the frequency of seizure decreased by 95%.

農村婦女子의 衛生意識 實態調査 硏究

黃春仙 대구교육대학교 1976 論文集 Vol.12 No.-

In the city life, we are threaten from various kind of pollutions such as a noise, contamination with exhausted gases, food cntamination from redioactive materials and river water contamination with becterium. I investigated the present life pattern and consciousness n sanitation of a farm womenfolk. Their consciousness of sanitation was under level through food, clothing and hosing. Therefore, I believe that persons who attend on the farm services, rural guidance leaders, students at the farm district and experts on health organization must enhance their ability for improvement of the farm life.

말레이시아 마하티르 총리의 정치갈등 극복의 리더십연구

전황수 서울대학교 국제지역원 2000 국제지역연구 Vol.9 No.4

말레이시아는 1957년 독립 후 종족갈등을 막기 위해 말레이계 국민이 주축이 된 말레이민족연합기구(UMNO: United Malays National Organization)와 중국계, 인도계 등 타종족간 집권연합의 국민전선(NF: National Front) 체제에 의해 정국안정을 달성해왔다. 1969년 중국계 주민들에 대한 말레이계 원주민의 대규모 폭동이 일어났으나 그후 말레이계 국민에 대한 경제 ·사회전반에 걸친 우대정책으로 별다른 문제없이 종족간 화합을 누려왔다. 1981년부터 집권한 마하티르 총리는 해외자본의 적극적인 유치와 수출진흥 정책으로 고도성장을 달성하면서 UMNO의 권위주의체제와 국민의 높은지지에 힘입어 장기집권과 정치안정을 이룩하였다. 그러나 정치적 후계를 둘러싼 당내갈등과 외환위기의 해결책을 놓고 마하티르와 안와르 부총리간 대립이 악화되자 결국 마하티르는 1998년 9월 안와르를 부총리에서 해임한 후 구속하였다. 마하티르는 안와르에 대한 강경한 대처와 명예를 훼손하는 방법으로 안와르 세력을 제거하였고, 1998년 후반부터 경제회복이 성과를 거둠에 따라 마하티르에 대한 비판정서는 약화되었다. 특히 1999년 4월에 실시된 사바주 선거의 승리와 1999년 11월에 실시된 조기총선의 선전은 그의 견고한 정치기반을 대내외에 보여주었다. 그러므로 마하티르는 총선승리와 국민지지로 당분간 별다른 도전 없이 자신의 정책을 추구해 나갈 수 있게 되었다. 마하티르의 서방에 대한 비난공세와 민족주의 열기로 인한 국민적 공감대 형성, 반정부시위가 종족폭동으로 비화되지 않을까 우려하는 중국계 국민들의 묵시적 지지, UMNO와 정부내의 기반강화, 고정환율제와 신용공급 확대에 의한 경제회복, 순종적인 국민성 등이 마하티르의 정치갈등을 극복하는 요인으로 작용하였다. Independent since 1957, Mahathir's coalition government of United Malays National Organization(UMNO) successfully put together a viable union of National Front through a strong network of party organization, funding and through generating an overwhelming support of the Malaysian populace by successfully implementing the policy of "Bumiputra". The first inauguration of the Prime Minister goes back to 1981, and he has since wield a high level of popular support due to his pragmatic leadership in various issues, such as his policy on racial reconciliation, economic development, and restoring self-dignity to the Malaysian people. The relationship between Mahathir and his Vice Prime Minister Anwar Ibrahim began to deteriorate rapidly especially after the coincidental events of foreign policy crisis and intra-party strife. Subsequently, Mahathir forced to the resignation of Anwar, which led to his eventual downfall and arrest. Restoring to various tactics of suppressing his opposition and defaming the personal integrity of his chief political rivals, Mahathir by and large succeeded in undermining the popular support of Anwar. In addition, an unforseen economic recovery which took place in the latter part of 1998 has played a significant role in acquiescing any political opposition. Furthermore, a triumphant win in the national election and the concurrent increase in the foreign investment were clear indicators of the efficacy of his regime. In conclusion, the consolidation of UMNO and the strengthening of the government organ, and the subsequent economic recovery have, in all likelihood, sealed a prolonged rule by the Prime Minister Mahathir, without him having to relinquish power.

유도전동기 벡터제어 시스템을 이용한 속응제어에 관한 연구

황락훈,나승권,이춘상 세명대학교 2000 世明論叢 Vol.8 No.-

In this paper, the flux vector should be precisely estimated. But, in the speed sensorless control, it is difficult to estimate the flux due to the influence of leakage reactance drops. Therefore, the proper flux estimation method is required. Also, considering with explanation an influence of speed estimation mechanism depend on error about the second resistance size established, it estimates the deviation of the second resistance establishment and exhibits a compensation method, what is more, it designs a reparation program using the fuzzy algorithm and testifies the result with the computer simulation. In consequence, it makes a good result for more powerful vector control system about the outside trouble. In this paper, Induction motor speed and torque are usually controlled by the following three ways : slip frequency control, vector control and torque constant control. But there have been little analyses on the transient characteristics in these methods. Furthermore, since the control system is complex and/or has much problems in its implementation and transient characteristics, it is relatively difficult to apply these methods to the rapid response control for the precision machinery in these days.