하수처리에 있어서 소각용융슬래그의 여과특성

박상구 ( Sang-goo Park ),한양수 ( Yang-soo Han ),이민희 ( Min-hee Lee ) 한국환경기술학회 2014 한국환경기술학회지 Vol.15 No.5

본 연구에서는 폐기물 소각재를 활용한 용융슬래그를 사용하여 여과재로 활용하기 위한 여과실험을 수행하였으며, 표준여과사와 비교함으로서 용융슬래그의 여과재 적용 가능성을 검토하였다. 표준여과사와 소각용융슬래그를 이용하여 여과실험을 수행한 결과 SS와 COD 제거율은 표준여과사와 소각용융슬래그가 비슷한 처리율을 보였으며, T-P의 경우는 6.6%, T-N은 소각용융슬래그가 27.0%가 더 높은 제거율을 보였다. 용융슬래그와 표준여과사를 이용하여 시간변화에 따른 여과율실험을 수행한 결과 소각용융슬래그 No.40#(0.43 mm)의 경우 여과능이 표준여과사와 동등한 여과능을 보이는 것으로 나타남에 따라 여과재 입경을 고려할 경우 표준여과사 보다 동등하거나 그 이상의 여과성능을 예상할 수 있으며, 소각용융슬래그가 더 빠른 여과속도를 나타내어 소각용융슬래그가 표준여과사에 비하여 시간당 통과 유량을 증대시킬 수 있고 면적당 처리 유량이 크게 증대 가능하다. The objective of the study is to find a way to utilize the MSWI(municipal solid waste incinerator) slag as filter material and used the standard sand as actual filtering experiment to analyze filtering efficiency. As the result of filtering test, the removal efficiency of SS and COD showed about same level of filtering capability similar to standard filter sand. The MSWI slag has shown 27.0% higher with T-N, and 6.6% higher with T-P compared to the standard filter sand. Also, the removal efficiency comparison result with No. 40#(0.43mm) the MSWI slag showed equal or greater filtering capability and higher filtration velocity. Thus, the MSWI slag could help to advance treatment efficiency if used as filtering material instead of the filter sand.

Zn1-xCdxTe 단결정의 Cd 함량에 따른 결정 구조의 분석

박지종 ( Ji Jong Park ),강현식 ( Hyun Shik Kang ),한상욱 ( Sang Wook Han ) 전북대학교 과학교육연구소 2007 科學敎育論叢 Vol.32 No.-

직업 교육 활성화를 위한 전공 진로 지도 프로그램 개발

박성종,한명석,김갑일,Park Sung-Jong,Han Myoung-Seok,Kim Kab-Il 한국공학교육학회 2000 공학교육연구 Vol.3 No.2

경쟁 사회에서 생존을 위해 직업 교육기관은 학생들에게 능력 중심 직업 교육을 실시하여야 하며 직업 분야 진로 선택의 문제를 해결하기 위해서는 체계적인 진로 지도 프로그램이 개발되어야 한다. 대학 1학년 학생들에게 미래의 직업 분야에 적응할 수 있도록 원활한 전공 선택과 전공 교과 학습 상담을 위한 진로 지도가 필요하다. 직업 분야 관련 과목의 조기 학습은 학생들의 학습 동기 유발에 매우 중요하며 이를 통해 학생들은 장래 직업 선택과 다양한 직업 분야의 진로 정보를 제공받게 된다. 본 연구에서는 진로 지도 교과목 개발과 학습 계획을 위한 learning map을 통하여 교육 수요자 스스로 학습 계획을 세우고 대학 과정의 특정 직업 관련 지식의 획득과 장래 직업 준비를 위한 전공 진로 지도 프로그램을 개발하였다. 설문지를 통하여 그 타당성을 검증함으로서 장래 직업 분야에서 유용한 직업인이 될 수 있도록 직업 교육 활성화 방안을 제시하였다. To survive in the highly competitive environment, a vocational education institution must offer its students an attractive system of competency based vocational education. A first-term freshman at university and college should also be allowed to adjust the course selection Early exposure within one or more fields of study creates a high level of enthusiasm which helps students maintain their motivation. It also helps students decide if course selection is right for career choice and they should be provided a large number of diverse occupational opportunities later In this paper, we discuss how to activate the vocational education. Also we developed vocational guidance program for course selection through the subject for vocational guidance and the learning map for learning plan. This program was assessed through the survey on opinions of freshman.

얇은 강판을 이용한 냉간성형 각형 CFT 기둥-보 외다이아프램 접합부 설계식 제안

박제한(Park Jeh-Han),이성희(Lee Seong-Hui),고수진(Go Su-Jin),손상현(Son Sang-Hyun),최성모(Choi Sung-Mo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1

Unlike 4seam Plate square column and 2seam cold-formed square column used until now, the new column has been developed using reduction of steel amount and composition effects between concrete and square column. In design of column-beam connection external diaphragm relatively no effected about tension force has been selected because of thin walled cold-formed square column and there was necessity of new design equation because width-thickness ratio go over beyond range of design equation. Also we suggest the new external diaphragm design equation considering increment of internal force from Cone Failure by anchor of column section inner part and verification was conducted by structural experiment analysis.

Coat Color Patterns and Genotypes of Extension and Agouti in Hanwoo and Jeju Black Cattle

Sang-Hyun Han(한상현),In-Cheol Cho(조인철),Jae-Hwan Kim(김재환),Moon-Suck Ko(고문석),Young-Hoon Kim(김영훈),Eun-Young Kim(김은영),Se-Pill Park(박세필),Sung-Soo Lee(이성수) 한국생명과학회 2011 생명과학회지 Vol.21 No.4

소의 Extension(E), Agouti(A) 유전자형과 모색유전양상의 연관관계를 이해하기 위해, 한우와 제주흑우(JBC), 이들 사이에서 생산된 교배후손에서 melanocortin-1 receptor( MC1R)과 agouti signaling protein( ASIP)의 유전자형을 분석하였다. 흑모색의 JBC에서는 세 가지 MC1R대립인자들(E<SUP>D</SUP>, E?, e)이 모두 발견되었다. JBC 집단은 한우에서 우점적으로 나타나는 열성동형접합자(e/e)가 발견되지 않았다. 반면, MC1R E?/e한우는 흑모색이 아닌 갈색이나 적색의 모색을 나타내었다. ASIP유전자에서, 한우에서는 L1-BT 전위인자의 삽입/결실에 의해 세 가지 유전자형(A/A, A/A<SUP>Br</SUP>, A<SUP>Br</SUP>/A<SUP>Br</SUP>)이 모두 관찰되었다. JBC 집단에서는 ASIP A<SUP>Br</SUP> 대립인자가 드물게 관찰되고, ASIP A<SUP>Br</SUP>/A<SUP>Br</SUP> 동형접합인 개체들은 발견되지 않았다. ASIP A<SUP>Br</SUP> 대립인자를 보유하더라도 한우와 JBC, 이들의 교배후손에서도 agouti-유사 얼룩무늬 모색은 발견되지 않았다. 교배후손의 모색은 Agouti 유전자형과는 무관하고, Extension유전자형과 직접적으로 연관되어 황-갈색(e/e)과 암-갈/흑색(E?/e)으로만 구분되었다. ASIP유전자형은 아마도 한우 또는 교배 후손에서 모색의 발달에 영향이 없는 것으로 추정된다. 본 연구 결과는 한우, 제주흑우, 이들의 교배후손에서 MC1R유전자형이 모색 표현형을 결정하며, ASIP유전자형은 모색의 변이에는 핵심적인 역할을 수행하지 않는다는 것을 시사한다. To understand the relationship between coat color inheritance patterns and genotypes of Extension( E) and Agouti( A) loci in cattle, the genotypes for melanocortin-1 receptor( MC1R) and agouti signaling protein ( ASIP) were analyzed in Hanwoo, Jeju black cattle (JBC), and their crossbred progeny. Three MC1R alleles ( E<SUP>D</SUP>, E?, and e) were found in the black-colored JBC population. JBC had no recessive homoygotes (e/e), but this genotype was predominant in the Hanwoo breed. However, MC1R E?/eHanwoo did not produce a black coat color as they appeared either as brown or solid red. For ASIP, three genotypes ( A/A, A/A<SUP>Br</SUP>, and A<SUP>Br</SUP>/A<SUP>Br</SUP>) were determined by insertion/deletion of an L1-BT element in Hanwoo. The ASIP A<SUP>Br</SUP> allele was rarely observed, and no ASIP A<SUP>Br</SUP>/A<SUP>Br</SUP> homozygotes were detected in the JBC population. Cattle carrying ASIP ABr did not show any agouti-like brindle pigmentation patterns in either breed or their progeny. The coat colors of the crossbred progeny were discriminated by two colors, yellowish-brown versus dark-brown or black, and their coat colors were directly related to the genotypes of the Extensionlocus, yellowish-brown (e/e) and dark-brown or black (E?/e), but not to the Agouti locus. ASIP genotypes probably did not affect coat color development in the Hanwoo or crossbred progeny. Our results suggest that the ASIP genotypes do not play key roles in coat color variation, but the MC1R genotypes do direct the phenotypes of Hanwoo, JBC, and their progeny.

메탄보정계수(MCF)의 결정을 통한 C 위생매립장 메탄가스 발생량 산정

박상찬 ( Sang-chan Park ),강병욱 ( Byung-wook Kang ),이상우 ( Sang-woo Lee ),한양수 ( Yang-soo Han ),연익준 ( Ik-jun Yeon ) 한국환경기술학회 2012 한국환경기술학회지 Vol.13 No.4

최근 들어, 산업발달과 인구증가에 따른 지구온난화 영향에 인한 이상기후의 피해가 증가함에 따라 국제적으로 CO₂, CH₄, N₂O, HFCs, PFC, SF₆ 등의 온실가스를 줄이기 위한 노력을 해오고 있다. 이를 위하여, 먼저 정확한 온실가스 발생량의 산정을 수행하는 것이 중요하다. 본 연구에서는 C 위생매립장에서 발생되는 CH₄가스의 발생량을 산정하기 위하여 2006 IPCC가이드라인에서 제시된 Tier1와 Tier2 방법을 적용하여 보았다. 이 때 CH₄가스 발생량 산정을 위한 Tier1와 Tier2 방법 적용 시 변수(DOC_f, DOC, F, R, OX 등)는 2006 IPCC 가이드라인과 환경공단에서 발표된 우리나라 배출계수를 사용하였으며, 보다 정확한 CH₄가스 발생량 산정을 위한 MCF 결정을 위해 매립고의 영향을 고려하여 MCF를 변화시켰으며, 이를 검토하기 위해 C 위생매립장의 현장 CH₄가스 측정량과 비교하여 보았다. 연구 결과, 2006 IPCC 가이드라인에서 제시된 Tier1와 Tier2 방법을 적용 시 실제 CH₄가스 발생량과의 절대평균오차는 각각 47.6%와 54.7%이었으나, 매립고에 따른 MCF의 변화를 통한 실제 CH₄가스 발생량과 Tier1와 Tier2 방법에 의한 산정량의 오차는 각각 17.86%와 18.6%로 절대평균오차가 크게 감소함을 보였으며, 이로 인하여 보다 정확한 CH₄가스 발생량 예측이 가능한 것으로 나타났다. Recently, human beings are under threat from the problems caused by global warming. Therefore, all countries of the world try to reduce greenhouse gas(CO₂, CH₄, N₂O, HFCs, PFC). To set up a goal of reduction level, it was important to precisely calculate the production of greenhouse gas. In this study, Tier1 and Tier2 methods which was suggested by 2006 IPCC (Intergovernmental Panel on Climate Change) guideline, was used to calculate CH₄ production from C sanitary landfill. The all values of factors except MCF(Methane Conversion Factor) were defaults values that were provided by 2006 IPCC guideline and Korea emission factors for Tier1 and Tier2 method. The values of MCF was considered depending on the depth of dumping in landfill. The calculated results compared with actual survey data. The production of CH₄ without the correction of MCF showed 47.6%, 54.7% average errors in Tier1 and Tier2, respectively. However, correction of MCF depending on dumping reduced average errors to 17.9% and 18.6%. From the results, it was verified that corrected MCF considered by condition of landfill depth can be possible to predict proper CH₄ gas emission from C sanitary landfill.

2+2 연계 교육과정의 일반계 고등학교 직업과정에의 확대 방안 연구

박성종(Sung Jong Park),한명석(Myoung Seok Han),김갑일(Kab Il Kim) 대한공업교육학회 2000 대한공업교육학회지 Vol.25 No.2

The purpose of this study is to modify the 2+2 articulated educational system between academic high school, vocational high school and college for qualitative deepening and extension method through the survey of Tech Prep program, project method and curriculum articulation. This study was analyzed the questionnaire of the relevant teachers and students in high school and college. Through this study, it is confirmed that the basic principle is necessary in articulation between academic high school and college but the fundamental skill through project method is necessary between vocational high school and college.

연계 교육 활성화를 위한 예비대학 프로그램 개발에 관한 연구

박성종(Sung Jong Park),한명석(Myoung Seok Han),김정순(Jeong Soon Kim),박덕현(Deok Hyun Park),김갑일(Kab Il Kim) 대한공업교육학회 1998 대한공업교육학회지 Vol.23 No.1

The purpose of this study was to modify the bridge course especially for active 2+2 articulation educational program. The bridge course was assessed through the survey on opinions of technical high school teaches and bridge course graduates. Through this study (1) not only technical skills(technical contents) but also coping skills(to help students to learn how to cope with new challenges and prepare them for life long learning), (2) the basic set of skills it takes to transfer from one jobs or area of work to another, were suggested and prototypes of bridge course were developed.

생체 유래 골 이식재(OCS-B)의 안전성 및 유효성에 관한 연구

박호남,한상혁,김경화,이상철,박윤정,이상훈,김태일,설양조,구영,류인철,한수부,정종평,Park, Ho-Nam,Han, Sang-Hyuk,Kim, Kyoung-Hwa,Lee, Sang-Chul,Park, Yoon-Jeong,Lee, Sang-Hoon,Kim, Tae-Il,Seol, Yang-Jo,Ku, Young,Rhyu, In-Chul,Han, Soo-Boo 대한치주과학회 2005 Journal of Periodontal & Implant Science Vol.35 No.2

Inorganic bovine bone mineral has been widely researched as bone substitution materials in orthopedic and oral and maxillofacial application. OCS-B(NIBEC, Korea) is newly-developed inorganic bovine bone mineral. The aim of this study is to evaluate the safety and efficacy of bovine bone-derived bone graft material(OCS-B). Micro-structure of newly-developed inorganic bovine bone mineral(OCS-B) was analyzed by scanning electron microscope(SEM). Round cranial defects with eight mm diameter were made and filled with OCS-B in rabbits. OCS-B was inserted into femoral quadrant muscle in mouse. In scanning electron microscope, OCS-B was equal to natural hydroxyapatite. Rabbits were sacrificed at 2 weeks and 4 weeks after surgery and mice were sacrificed at 1 week and 2 weeks after surgery. Decalcified specimens were prepared and observed by microscope. In calvarial defects, osteoid and new bone were formed in the neighborhood of OCS-B at 2 weeks after surgery. And at 4 weeks after surgery osteoid and new bone bridge formed flourishingly. No inflammatory cells were seen on the surface of OCS-B at 1 week and 2 weeks in mouse experimental group. It is concluded that newly-developed inorganic bovine bone mineral(OCS-B) is a flourishing bone-forming material and biocompatible material.

저신장율 대향류확산화염에서 화염소화 및 화염진동에 관한 연구

박정(Jeong Park),박대근(Dae Geun Park),윤진환(Jin Han Yun),길상인(Sang In Keel) 한국연소학회 2009 KOSCOSYMPOSIUM논문집 Vol.- No.39

Experimental and numerical studies have been conducted on the characteristics of flame extinction and flame oscillation at low-strain-rate counterflow non-premixed flames diluted with nitrogen. The studies have been conducted varying burner diameter, velocity ratio, and global strain rate. The behaviors of flame extinction diluted with nitrogen indicates C-curves. With finite burner diameter, low-strain-rate flame extinctions are mainly attributed by radial conduction heat loss rather than radiative heat loss. The flame extinction mode in low and high strain rate flames is group into three in studied flame ranges; shrinking flame-disks with and without flame oscillation at low-strain-flames and flame hole (or flame stripe) at high-strain-rate flames. The flame extinction conditions for flame hole or flame stripe do not coincide with those at turning points. The extinction characteristics at low-strain-rate flames are extended to higher strain rates over turning points due to radial conduction heat loss for finite-burner-diameter flames.