과학 교과서의 과학사 자료 분석을 위한 삼원 분석틀 개발 및 적용: 지구과학사를 중심으로

박세기,이기영,이면우 한국지구과학회 2011 한국지구과학회지 Vol.32 No.1

과학사는 과학 수업에서 여러 가지 목표를 달성하기 위한 유용한 수단으로 간주되어 왔다. 이 연구의 목적은 과학 교과서에 사용된 과학사 자료를 효과적으로 분석하기 위한 삼원 분석틀을 개발하고, 이 분석틀을 적용하여 제7차교육과정의 지구과학사 자료를 분석하는 것이다. 개발된 분석틀은 수업맥락, 역할, 제시유형의 3개 차원으로 구성되며,각각의 차원은 다시 몇 개의 하부 영역으로 세분된다. 개발된 분석틀을 이용하여 과학 교과서의 지구과학사 자료들을분석한 결과, 분석틀의 세 가지 차원과 각각의 영역에 부합되는 과학사 자료가 과학 교과서에 다양하게 포함되지 못한것으로 나타났다. 이러한 연구 결과를 바탕으로 삼원 분석틀의 활용을 통한 다양한 수업맥락과 목적의 조합으로 과학사교수-학습 자료의 개발을 제안하였다. History of science (HOS, hereafter) has been considered as a useful tool for achieving a variety of objectives in science lesson. The purpose of this study was to develop three dimensional framework for effectively analyzing HOS content in science textbook. In addition, using this framework, we analyzed HOS content in science textbooks of the 7th curriculum by focusing on the history of Earth science. Developed framework consists of three dimensions; instruction context, role, and type. Each dimension has several sub-domains. The results of textbook analysis revealed that science textbook didn’t include diverse HOS materials that are appropriate to three dimensions and its sub-domains of the framework. Based on the results, we proposed that three dimensional framework is an effective tool to develop materials for teaching and learning materials of HOS with multiple coordinations of various contexts and purposes.

Recursive 구조를 이용한 MPEG-2 AAC 복호화기의 필터뱅크 구현

박세기,강명수,오신범,이채욱 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.6C

MPEG-2 Advanced Audio Coding(AAC) is widely used in the multi-channel audio compression standards. And it combines hi인-resolution filter bank prediction techniques, and Huffman coding algorithm to achieve the broadcast-quality audio level at very low data rates. The forward and inverse modified discrete transforms which are operated in the encoder and the decoder of the filter bank need many computations. In this paper, we propose suitable recursive structure at IMDCT processing for MPEG-2 AAC real-time decoder. We confirm the memory, the computation speed and complexity of the proposed structure.

2단 IMDCT Recursive 구조를 이용한 MPEG-2 AAC 복호화기의 필터뱅크 구현

박세기,강명수,오신범,이채욱 대구대학교 정보통신연구소 2003 情報通信硏究 Vol.2 No.1

MPEG-2 AAC(Advanced Audio Coding)는 높은 압축율과 고음질의 특성을 갖는 멀티채널 오디오 압축 표준으로 알려져 있고, 대우 낮은 비트율에서 방송 음질 수준의 오디오를 제공하기 위해서 고해상도 필터뱅크(high-resolution filter bank), 예측기법(prediction), 허프만 부호화(Huffman coding) 등을 결합하여 사용한다. MPEG-2 AAC 필터뱅크에서 부화화기와 복호화기에서 각각 수행하는 MDCT(Modified Discrete Cosine Transform)/ IMDCT(Inverse MDCT) 연산은 특히 많은 연산을 필요로 한다. 본 논문에서는 MPEG-2 AAC 실시간 복호화 시스템을 하드웨어로 구현시 IMDCT의 연산에 적합한 2단 IMDCT의 Recursive 구조를 제안한다. 그리고 메모리와 연산속도, 하드웨어의 복잡도를 기존에 제안된 알고리듬과 비교하였다. MPEG-2 Advanced Audio Coding(AAC) is the uideb used audio standard and offers the high-quality multi-channel surround audio AAC algonthm combines the coding efficiency of a high-resolution filter bank, prediction techniques, and Huffman coding to achieie the broadcast-qualitv audio at very low data rates The foruard and inperse modified discrete transform(MDCT) are two of the most computational) 1 intensive operation in the MPEG-2 AAC In this paper, we propose the suitable recursive structure at IMDCT process for MPEG-2 AAC real-time decoder, and compared the memory, the computation speed and complexity of hardware with the proposed algonsms

청심보혈탕(淸心補血湯)의 항암(抗癌) 및 면역증강효과(免疫增强效果)에 관(關)한 실험적(實驗的) 연구(硏究)

박세기,류봉하,박동원,류기원,Park, Se-Ki,Ryu, Bong-Ha,Park, Dong-Won,Ryu, Ki-Won 대한한방내과학회 1998 大韓韓方內科學會誌 Vol.19 No.1

The aim of this experimental study was to evaluate the anti-tumor effects of Chungsimbohyeltang through investigation about viability of tumor cell by MTT assay, survival period of mice transplanted with L-1210 cells, growth inhibition on the tumor cell, body weight variation in mice transplanted with sarcoma-180 cells and its immunomodulatory effects through the investigation on delayed type hyper-sensitivity, the hemagglutinin and hemolysin titers for humoral immune response, the appearance of rosette forming cells for cell-mediated immune response, the natural killer cell activity, the transformation of lymphocyte, the productivity of Interleukin-2 and phagocytic index K was performed in immune-depressed ICR mice induced by methotrexate treatments. The results were as follows ; 1. $IC_{50}$ of Chungsimbohyeltang treated group was 5.85mg/ml in SNU-C4 cell, 1.38mg/ml in SNU-396 cell, 0.21mg/ml in SNU-1 cell, so it had low anti-tumor activity. 2. The both groups of Chungsimbohyeltang extract 10mg/kg and Chungsimbohyeltang extract 20mg/kg had no toxicity and the group of Chungsimbohyeltang 20mg/kg which was shown 120% in ILS had the effect of life prolongation in mice transplanted with L-1210 cells. 3. In the growth inhibition on the tumor cells, only the group of Chungsimbohyeltang extract 20mg/kg was noted and in the weight variation in mice transplanted with sarcoma-180 cells, both groups of Chungsimbohyeltang extract had a significant effect. 4. In the delayed type hypersensitivity and appearance of rosette forming cells, both groups of Chungsimbohyeltang extract didn't have any significant effect. 5. The hemagglutinin titers was slightly increased with no significance, and the hemolysin titers was significantly increased in the only group of Chungsimbohyeltang extract 20mg/kg. 6. The natural killer cell activity of the Chungsimbohyeltang extract groups was significantly increased in the ratio of 100:1 of effector and target cells, but it was not significantly increased in the ratio of 50:1, 10:1. 7. The transformation of lymphocyte and the productivity of Interleukin-2 were increased significantly and in dose-dependent manner in both group of Chungsimbohyeltang extract. 8. The phagocytic effect of macropage was significantly increased in both groups of Chungsimbohyeltang extract. Considering the results above, we could conclude that Chungsimbohyeltang have an indirect anti-tumor effect through the modulation of immunme response, although it had not toxicity on the tumor cell it self.

Characteristics of Laser Dry Etching for Al0.3 Ga0.7 As / GaAs Multilayer

박세기,이천,김무성,민병돈,김성일,민석기 대한전자공학회 1996 대한전자공학회 학술대회 Vol.1996 No.1

Recursive 구조를 이용한 MPEG-2 AAC 복호화기의 필터뱅크 구현

박세기,강명수,오신범,이채욱 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.6

CFC 대체물질을 이용한 GaAs의 레이저 유도 에칭

박세기,이천,김무성,Park, Se-Ki,Lee, Cheon,Kim, Moo-Sung 한국전기전자재료학회 1996 電氣電子材料學會誌 Vol.9 No.3

Non-ozone layer destructive Chlorofluorocarbon(CFC) altematives(CHCIF$_{2}$ and $C_{2}$H$_{2}$F$_{4}$) have been initially used for laser-induced thenrmochemical etching of GaAs. High etching rate up to 188.mu.m/sec and an aspect ratio of 2.7 have been achieved by a single scan of laser beam, respectively. The etching rate at constant ambient gas pressure was found to saturate for beam power. The chemical compositions of the reaction products deposited on the etched groove were measured by Auger electron microscopy(AES). Etched profile, depth and width were observed by scanning electron microscope(SEM).

서점의 불황 타개책

박세기 한국출판연구소 2009 출판 연구 Vol.17 No.-

수소화 처리에 의한 GaAs / AlGaAs 다중양자우물의 PL 연구

박세기,이천,정민 ( Se Ki Park,Cheon Lee,Min Jung ) 한국전기전자재료학회 1997 한국전기전자재료학회 추계학술대회논문집 Vol.1997 No.1

청소년궤양성 대장염 환자의 사상체질요법에 대한 증례보고

박세기,김근엽,신선미,고흥,Park, Se-gi,Kim, Geun-yeob,Shin, Seon-mi,Ko, Heung 대한한방내과학회 2017 大韓韓方內科學會誌 Vol.38 No.4

Objectives: This study discusses the effects of constitution therapy on adolescent ulcerative colitis. Methods: A 12-year-old male patient was treated with western medication for six months and herbal medicine for one year and six years; however, his abdominal pain, mucousy stool, bloody stool, and diarrhea persisted. He was diagnosed as having Taeumin according to Sasang constitution classification and treated with Sasang constitutional medicine (i.e., Yeuldahanso-tang and food restrictions based on constitutional medicine theory). Before the first treatment, his Pediatric Ulcerative Colitis Activity Index (PUCAI) score was 35, but this score decreased to 15 within six months and was maintained at 10 by 18 months of treatment. He took the herbal medication for 38 months, and his PUCAI score was 0 at the end of treatment. His liver functioned normally despite long-term drug use, and a follow-up colonoscopy showed no ulcerative colitis except melanosis, which was presumed to be caused by the herbal medicine. Ulcerative colitis in pediatric adolescents requires treatment with pharmacotherapy and dietary control based on constitutional medicine to maintain disease remission. Conclusions: Constitutional therapy is effective for treating adolescent ulcerative colitis. More clinical data are needed for patients with ulcerative colitis.