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홍원표(Won-Pyo Hong),이기홍(Gi-Hong Lee) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.11
This paper proposes the green energy planning of apartment building complex. Microgrid concept has been proposed as a systematic approach to integrated community energy supply system and hybrid energy system with renewable sources and a small scale CCHP(combined cooling, heating & power) system. It aim to provide a conceptual energy planning solution for apartment building complex.
홍원규 ( Won Kyu Hong ),송희진 ( Hee Jin Song ),이현숙 ( Hyeon Sook Lee ),이종록 ( Jong Rock Lee ),신정현 ( Jeong Hyun Shin ),최광성 ( Gwang Seong Choi ) 대한피부과학회 2007 대한피부과학회지 Vol.45 No.8
Cowden syndrome is a rare autosomal dominant disorder characterized by mucocutaneous alterations including multiple facial trichilemmomas, oral mucosal papillomatosis, and acral keratoses. Extracutaneous lesions include polyposis of the gastrointestinal tract, and other multiple hamartoma of the internal organs. A 39 year-old man presented with multiple verruca-like papules and lichenified patches on the face, one year ago. He had been treated for atopic dermatitis for more than 10 years. Although he had been treated in accordance with atopic dermatitis for 1 year, his skin lesions had not improved, so a skin biopsy was performed. The skin biopsy specimen revealed the typical finding of trichilemmoma. Colonoscopy diagnosed diffuse colorectal polyposis. The clinical and hisopathologic findings were consistent with Cowden syndrome. We, herein, report a case of Cowden syndrome with atopic dermatitis. (Korean J Dermatol 2007;45(8):829∼831)
홍원표(Hong Won Pyo),이광우(Lee Kwang Wu),조삼덕(Cho Sam Deok),이재호(Lee Jae Ho) 대한토목학회 2007 대한토목학회논문집 C Vol.27 No.5
국내현장에서 수집된 43개 교대의 측방이동 실측자료에 대한 분석을 통해 말뚝기초교대의 측방이동을 간편하게 평가할 수 있는 방안을 제안한다. 실측된 교대측방변위를 고려하여 연약지반의 비배수전단강도와 교대배면에 작용하는 상재압의 관계를 분석한 결과, 교대 배변의 뒤채움으로 인한 상재압이 연약지반 비배수전단강도의 3배보다 작은 경우에는 실측된 교대변위가 국내 교대의 측방이동 허용치인 15㎜ 이내인 것으로 나타나, 교대 유지관리에 문제가 발생하지 않았다. 그러나 상재압이 연약지반 비배수전단강도의 3배~8.3배인 경우는, 교대변위가 15㎜~50㎜ 발생하는 것으로 나타났다. 따라서 이 경우 교대의 측방이동을 고려한 설계를 수행함으로써, 교대 측방변위를 허용치인 15㎜ 이하로 감소시켜야 한다. 특히 상재압이 비배수전단강도의 8.3배 이상이면, 50㎜ 이상의 심각한 교대변위가 발생할 수 있기 때문에, 적절한 교대 측방이동 대책공법이 강구되어야 하는 것으로 나타났다. 이러한 결과는 상재압과 비배수전단강도의 상관관계를 나타내는 사면지반의 안정수를 이용하면 측방유동지반상 말뚝기초교대의 측방이동 가능성을 간편하게 평가할 수 있음을 의미한다. 반면에 측방유동지수와 측방이동판정지수는 교대 실측변위 및 사면안전율과 상관성이 높지 않았다. 이는 경험지수만으로 교대의 측방이동 여부를 판정하는 것은 합리적이지 않음을 의미한다. 따라서 교대를 포함한 사면의 안정수가 3보다 크면, 교대기초말뚝의 사면안정 기여효과와 교대의 허용측방변위를 반영한 사면안정해석을 통해 교대 측방이동 여부를 면밀히 검토해야 한다. Field monitoring data for forty three piled bridge-abutments were investigated to suggest an evaluation method on lateral movement of the abutments. As the results of the investigation, if the surcharge pressure by backfills behind the piled-bridge abutment is less than 3 times the undrained shear strength of the soft grounds, the lateral displacement of the abutments was within 15 ㎜. Therefore, the abutment can be maintained without any problems because the abutment will move laterally within an allowable movement range. However, if the surcharge pressure is between 3 times and 8.3 times the undrained shear strength of the soft grounds, the abutments moved laterally between 15 ㎜ and 50 ㎜. In this case, the lateral displacement of the abutment should be considered on the design because the displacement may be considerable. Moreover, if the surcharge pressure behind the abutments is greater than 8.3 times the undrained shear strength of the soft grounds, the lateral displacement of the abutments could be more than 50 ㎜. In this case, a reasonable countermeasure should be applied to prevent excessive lateral displacement of the abutment, or the design of the abutment should be changed because the lateral movement is severe enough to severely damage the abutment. In tum, the stability number, which is the ratio of the surcharge pressure to the undrained shear strength can be used as the simplified empirical index to evaluate the possibility of lateral movement of abutments. However, both the lateral flow index and the lateral movement judgement index do not always show good relationship with not only the lateral displacement of the abutments but also the safety factor of slopes. Therefore, It is not always suitable to predict the lateral movement of abutments by using only conventional empirical indexes. These empirical indexes should be used together with the safety factor of slope with consideration of the allowable limit of the lateral displacement of the abutment.
홍원표(Won Pyo Hong),이재호(Jae Ho Lee),조삼덕(Sam-Deok Cho),이광우(Kwang Wu Lee) 한국토목섬유학회 2006 한국토목섬유학회 학술발표회 Vol.2006 No.4
Geosynthetic-reinforced and pile-supported (GRPS) systems have been used for several application fields in foreign countries. A series of researches have been performed to evaluate the effects of GRPS system in the internal field which is supposed damage due to lateral soil movement in soft ground. This paper describes a design case of GRPS system which is used as countermeasure against lateral movement of piled bridge abutment on soft ground. Useful design method for GRPS system is proposed through a design case
동적 콘 관입기를 이용한 철도궤도 하부구조물 평가 연구
홍원택(Won-Taek Hong),김상엽(Sang Yeob Kim),강성훈(Seong Hun Kang),이성진(Sung Jin Lee),장승엽(Seung Yup Jang),이종섭(Jong-Sub Lee) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10
철도궤도 하부구조물의 상태변화는 궤도 자체의 뒤틀림 및 침하를 야기한다. 본 연구에서는 현재 운영중에 있는 자갈도상 고속철도에 대하여 동적 콘 관입기를 적용하여 하부구조물의 상태를 평가하고자 하였다. 관입 시 자갈층에 의한 뒤틀림을 최소화하기 위하여 롯드 및 원추가 확장된 동적 콘 관입기가 제작되었으며, 실험 전반에 걸쳐 DCPI가 측정되었다. 실험결과, 각 구간에서의 평균 DCPI는 심도 0~28cm의 경우 12~31mm/blow, 28~85cm의 경우 2.5~3.5mm/blow, 85cm이상의 경우 1~1.75mm/blow로 측정되어 심도가 깊어짐에 따라 값이 작아지는 경향을 보였다. 동적 콘 관입기는 경량화된 장비이므로 신속한 실험수행이 가능하여, 기 운영중인 철도궤도 하부구조물 평가에 유용한 방법이 될 것이다. The changes of the track substructure cause distortion of tracks and settlement of track sub structure. In this study, dynamic cone penetrometer is applied to evaluate the condition of operating highspeed railway track substructure. To minimize the distortion of the rod, a cone penetrometer is made which has expanded diameter. In the field test, dynamic cone penetration index(DCPI) is measured. Experimental result shows that the DCPI varies from 12 to 31mm/blow for penetration depths of 0 to 28cm, 2.5 to 3.5mm/blow for penetration depths 28 to 85cm, and 1 to 1.75mm/blow for penetration depths more than 85cm. Dynamic cone penetrometer can perform rapid tests and also may be a useful method to evaluate the operating high-speed railway track substructure owing to lightweight and efficient testing procedure.