Hallimond Tube를 이용한 토양내 P.A.Hs 제거연구

권혁,김홍웅,박규홍 중앙대학교 건설환경연구소 2001 環境科學硏究 Vol.12 No.1

Soil washing or dredged processing is a water-based volume reduction process for mechanically scrubbing a contaminated soil to remove contaminants. In this study, the froth flotation was applied to clean contaminated soil containing poly nuclear aromatic hydrocarbons (P.A.Hs) using a modified Hallimond tube devised by Mulleneers et al. (Colloids and Surfaces A: Physicochemical and Engineering Aspects 151, 293-301, 1999). The effects of air flowrate, particle sizes, and the concentration of frothers such as sodium dodecy1 sulfate on the flotation performance were investigated. Overall recovery was increased with air flowrate and hydraulic entrainment seemed occurred when air flowrate was greater than 1.5 1/min. The highest recovery of 60 to 70% was obtained when 16ml of sodium dodecy1 sulfate was used at 15% of solid concertration in feed. Concentration effect observed in three minutes after the beginning of the experiments was relatively significant at the range of 20 to 150 microns of soil particles. Removal efficiency of phenanthrene was greater than that of naphthalene in case of 180 microns of particles. The first order reaction rate constant of phenanthrene was estimated as 0.12 min-1 using less than 74 microns and 0.21 min-1 using 177 to 300 microns of soil particles. Concentration effect of a more contaminated soil through flotation process will also be helpful in reducing the volume to be treated and the residence time of reactors in the following biological treatment or bioleaching process.

이온 플레이팅법으로 제조한 TiN 박막의 미세구조

권순영,김민호,이해석,손창헌,김규호 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.1

Hard coating의 일종인 TiN 피막을 PVD 법으로 제조할 경우, 이온 충돌 양상을 조절할 수 있는 기판 Bias와 질소 분압 등이 미세 구조와 피막 특성에 많은 영향을 미치는 것으로 알려지고 있다. 본 실험에서는 Ion plating에 의한 TiN 피막 제조에서 기판 바이어스 전압과 질소 분압을 변화시키면서 TiN 피막을 제조하고, 미세 구조를 조사하였다. 공정 변수에 관계없이 얻어진 모든 피막은 δ-TiN 단일상이었다. 질소 분압이 높아짐에 따라 우선배향은 (111)면에서 (200)면으로 바뀌었으며, (111)회절상과 (222) 회절상의 반가폭의 비는 감소하였다. 그리고 결정의 크기는 감소하는 거동을 보였으며 피막의 격자 상수는 증가하는 경향을 보였다. 기판 바이어스 변화에 대해서는 전압이 증가함에 따라 (111) 회절상의 반가폭은 -100V 가지 증가하다 그 이상에서는 다시 감소하였으며, 그 때 결정이 크기는 증가하는 경향을 보였다. 피막의 격자 상수는 기판 바이어스가 증가함에 따라 150V까지 증가하다 그 이상에서는 다시 감소하였다. The action of ionized particles has to be controlled properly in ion plating method, because the action of ionized particles has an effect on the microstructure of the thin film. In this pointview, we investigated microstructure of TiN thin film that was deposited with variables of N₂partial pressure is increased, the prefered orientation was changed(1110 plane to (200) plane, the ratio of FWHM of (222) to FWHM of (111)was decreased, grain size was decrease and lattice parameter was increased. As bias voltage was increased, the FWHM of (111) peak was increased to-100V, and then decreased with the grain size was increased. Lattice parameter of film was increased to-150V, and then decreased

한국 성인 기억력 평가를 위한 전산화 도구의 개발과 표준화

권준수,류인균,홍경수,연병길,하규섭 大韓神經精神醫學會 2002 신경정신의학 Vol.41 No.2

연구목적 : 본 연구는 전산화 평가도구를 개발하고, 신뢰도와 타당도를 검증하며, 표준화 자료를 얻기 위하여 수행되었다. 방 법 : 숫자 따라하기검사, 시각 단기기억력검사, 한글언어청각학습검사, 시각도형학습검사를 전산화하였으며, 27명의 정상인을 대상으로 하여 검사-재검사 신뢰도를 검증하였다. 타당도를 검증하기 위하여 48명의 정상인을 대상으로 검사 성적을 기존의 인지기능 검사 성적과 비교하였으며, 또한 본 연구에서 개발된 검사들의 내적 일치도를 평가하였다. 20세부터 50세까지 고졸이상의 학력을 가진 한국 남녀 성인 150명을 대상으로 표준화 자료를 얻었다. 결 과 : 전산화 기억력 검사들의 검사-재검사 성적은 paired t-test 결과 차이가 없었으며, Pearson 상관계수 0.405∼0.873의 높은 상관관계를 보였다. 숫자 따라하기검사, 시각 단기기억력검사, 언어청각학습검사는 기존의 지필 혹은 전산화 검사 결과와 높은 상관관계를 보였다. 시각도형학습검사는 유용한 검사이나, 향후 방법론적 개선이 필요한 것으로 생각된다. 전산화 기억력 검사 성적은 학력이 높을수록 우수하였으며, 성별과 연령도 결과에 영향을 미쳤다. 전산화 기억력 검사의 표준화 자료와 해석기준을 제시하였다. 결 론 : 20세부터 50세까지 고졸 이상의 학력을 가진 한국 성인 남녀에서 신뢰성 있고 타당성 있게 사용할 수 있는 전산화 언어 및 시각 기억력 검사도구가 개발되었으며, 표준화 자료와 해석기준이 마련되었다. Objectives : This study was conducted to develop the computerized memory tests for Korea adults. It also aimed at evaluating the reliability and validity of these tests and providing their normative data. Methods : Computerized versions of digit span, visual span, auditory applications and correction. The test-retest reliabilities of each test was evaluated by the paired t-test and Pearson's correlation coefficient using the data from 27 normal persons. The validity of each test was evaluated by the Pearsons's correlation coefficient between the computerized test scores and the pre-existing cognitive function tests using the data from 48 normal persons. The normative data were obtained from the 150 Korean adults, age 20 to 50, whose educational levels were higher than high school graduate Results : There were no statistical difference between the means of the test and retest scores. High correlations were also observed between the tests and the retest scores(r ranged from 0.405 to 0.873). The computerized digit span, visual span, and auditory verval learning tests scores were highly correlated with the pre-existing memory measures. The computerized memory test scores were greatly influenced by the educational level. The visual learning test seems useful, however, it requires methodological refinement. The normative data and guidelines for interpretation were provided. Conclusions : Clinically applicable computerized memory assessment tools with high reliability and validity were developed. The normative data for the Korean adults aged 20 to 50 were obtained and the guidelines for the interpretation were provided.

Polyethylene Terephthalate Film의 열자극전류 특성

유권재,이종규,김영전 충남대학교 자연과학연구소 1988 忠南科學硏究誌 Vol.15 No.1

Investigation on the characteristics of the TSC in Polyethylene terephthalate film were carried out at temperature region from 273K to 500K. As a result of the investigation, four peaks were identified such as peak A(359K), peak B1, B2(391K, 410K), peak C(473K). Those may be concluded to be respectively due to the depolarization of dipoles, the thermal release of the traped electron and the effect of space charge. Furthermore trap energy depths such as 1.23 eV and 1.30 eV for B1, B2 were obtained on the specimen by mean of initial rise method.

보행용 전문 신발과 일반 운동화의 운동역학적 비교 분석

최규정,권희자 한국운동역학회 2003 한국운동역학회지 Vol.13 No.2

Choi, K-J and Kwon, H-J. Sport biomechanical comparative analyses between general sporting shoe and functional walking shoe. Korean Journal of Sport Biomechanics, Vol. 13, No. 2, pp. 161-173. This study was performed to investigate the kinematic and kinetic differences between functional walking shoe(FWS) and general sports shoe(GSS). The subjects for this study were 4 male adults who had the walking pattern of rearfoot strike with normal feet. The movement of one lower leg was measured using force platform and 3 video cameras while the subjects walked at the velocity of 2/1.5 m/s. The findings of this study were as follows : 1. The angle of lower leg-ground and angle of knee with FWS was greater than with GSS at the moment of strike the floor and the moment of second peak ground reaction force. The decreasing rate of angle of ankle was smaller in FWS from the strike phase to the second peak ground reaction force. These mean upright walking and round walking along the shoe surface. 2. The maximal increased angle of Achilles tendon and the minimal decreased angle of rearfoot were smaller in FWS very significantly(p<0.001). Thus FWS prevent the excessive pronation of ankle and have good of rear-foot control. 3. The vertical ground reaction force and the rate of it to the BW were smaller in FWS statistically(p<0.001). The loading rate was smaller in FWS, too, and thess represent the reduction of load on ankle joint and prevention of injuries on it.

大學敎育의 評價方法 改善方案에 關한 硏究

李揆成,權相善,金大倫,朴哉林,林鍾吉,朴英淑 新羅大學校 1982 論文集 Vol.12 No.-

The present study aims to develop of evaluation method for college education. This study consiste of two parts: to identify the corelation between the freshmen's scores of pre-test for entrance examination and their scores of freshmen's year, and to make suggestions for the improvement of evaluation method in college on the basis of the former study results. Seen from the above mentioned aspects of this study, this study has meanings in its seek for a rational curriculum improvement and in its research of the pilot curriculum which presupposes the alleged system of limited graduation quota. This research which is conducted by above mentioned purpose andmeanings can be summerized as follows; 1) The freshmen's mean score of the-pre-test of college entrance examination is 192. 38. Among the departments of natural scienc attained the most higher score(204.22). and department of arts and gymnastics 162. 02 which is below average score. 2) In the achivements of the freshmn'e year the departments of natural sciences obtained the best results, followed by the departments of arts and gymnastics, education, and cultural aciences in oder. 3) There is no corelation between the pre-test scores of college entrance examination and the college achivement results. 4) The mean scores of the major and teaching subjects geneally increas as they go up into the advanced school years. 5) Each department has their own method of evaluation. 6) Teaching syllabus is asked to be presented whit the direction of clas, contents, purpose, and specific items of evaluation. 7) Achivements of college work must be evaluated by the normal distribution curve with the facts about specific factors of the study and students group taken into consideration.

국제수도협회(IWA) Specialist Conference 참관기 "Nano and Micro Particles in Water and Wastewater Treatment"

이상협,권순범,박규홍,한무영 대한상하수도학회 2003 상하수도학회지 Vol.17 No.5

폐석고와 Fly Ash를 재활용한 차수재의 배합비 산정을 위한 연구

이종우,권혁,임남웅,박규홍 중앙대학교 건설환경연구소 2000 環境科學硏究 Vol.11 No.2

This study was conducted to estimate experimentally the optimal mixing ratio of landfill liner materials using waste plaster and fly ash. Feasibility of reuse of waste plaster and fly ash was investigated as well as the use of cement, soil, and natural bentonite as landfill liner materials. Soil property index tests and compaction tests were performed to see the property of the soil used in this study. After selected materials were mixed with varied mixing ratio, hydraulic conductivity tests and unconfined compressive strength tests were conducted to see whether new liners using waste materials could meet the criteria as landfill liner regulated by the government. The optimal mixing was suggested as 30% of fly ash, 60% of soil used in this study, 3% of cement, 7% of bentonite to obtain 9.8×10-8 ~1.1×10-6 cm/sec of hydraulic conductivity and 6.2~15.2kg/cm2 of compressive strength.

입원한 정신분열병 환자의 가족에 대한 가족교육 단기 프로그램의 효과

이부영,신민섭,하규섭,권준수,손정우 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.6

정신분열병 환자의 가족은 많은 심리적 스트레스와 부담감을 지니고 생활하게 된다. 또한 환자와 그 가족 사이에 마찰이 생겨 결국 환자의 예후에 좋지 않은 영향을 끼치기도 한다. 이런 것들을 해결하기 위한 여러 정신과적 중재방법들 중 정신교육적 가족치료의 일환으로서 가족 교육 단기 프로그램의 유용성이 점점 부각되고 있다. 이에 우선 가족 교육 연구진을 구성하고 교육자료를 준비한 뒤, 1995년 9월 2일부터 입원한 정신분열병 환자의 가족을 대상으로 가족교육을 시행하였으며 교육적·후에 설문지 평가를 하였다. 이때 평가한 것은 일상생활에서의 가족의 전반적인 불안, 환자와 연관된 걱정, 환자에 대한 가족의 거부감, 정신분열병에 대한 전반적 지식 등이다(N=20). 또 대조군은 1996년 1월부터 5월까지 서울대학병원 신경정신과 폐쇄병동에 입원한 정신분열병 환자 가족을 대상으로 하였으며, 같은 종류의 설문지로 사전·사후평가를 하였다(N=10). 결과는 다음과 같다. 1) 교육군과 대조군의 사전평가 점수를 각 설문지별로 비교하였는데, 불안 설문지, 지식 설문지의 점수에서는 두 군간의 차이가 발견되지 않았으나, 거부감 설문지의 점수는 교육군에서 대조군보다 통계적으로 유의하게 높았다(F=9.50, df=1.28, p<0.01). 2) 교육군과 대조군 각 군 내에서 사전·사후평가 점수를 비교하였을 때, 교육군에서는 지식 설문지에서 사후평가 점수가 사전평가 점수보다 유의하게 높았으며(t=5.43, df=19, p<0.01), 걱정 설문지와 거부감 설문지에서는 사후평가 점수가 사전평가 점수보다 유의하게 낮았다(걱정 설문지의 t=-3.03, df=19, p<0.01 ; 거부감 설문지의 t=-2.34 df=19, p<0.05). 그러나 교육군에서 불안 설문지의 점수에서는 별다른 차이가 나타나지 않았다. 한편 대조군에서도 지식 설문지에서 사후평가 점수가 사전평가 점수보다 유의하게 높았지만 (t=1.86, df=19, p<0.05), 교육군에 비해서 그 차이는 경미하였다. 3) 각 설문지의 사전·사후평가 점수의 차이의 상관관계를 측정한 결과 교육군에서는 우선 불안 점수의 차(r=-0.56, p<0.01)와 걱정 점수의 차(r=-0.57, p<0.01)가 지식 점수의 차와 유의한 부적 상관관계를 보였으며, 불안 점수의 차와 걱정 점수의 차 사이에는 유의한 정적 상관관계(r=0.55, p<0.01)가 보였다. 대조군에서는 걱정 점수의 차와 지식 점수의 차 사이에 유의한 부적 상관관계가 존재하였다(r=-0.60, p<0.05). 4) 각 설문지의 사전·사후평가 점수의 차와 사회인구학적 특성 사이의 상관관계를 조사한 결과 교육군에서는 불안 점수의 차와 환자의 유병기간(r=0.39, p<0.05), 불안 점수의 차와 참가 가족의 교육 수준(rs=0.43, p<0.05), 걱정 점수의 차와 환자의 유병기간(r=0.45, p<0.05), 걱정 점수의 차와 참가 가족의 교육 수준(rs=0.49, p<0.05) 사이에 통계적으로 유의한 정적 상관관계가 존재하였으며, 대조군에서는 걱정 점수의 차와 참가 가족의 나이 사이에 정적 상관관계(r=0.64, p<0.05)를, 그리고 걱정 점수의 차와 참가 가족의 교육 수준 사이에 부적 상관관계가 존재하였다(rs=-0.74, p<0.01). Objects : The purpose of this study was to investigate the effectiveness of the brief program of family education in helping families of inpatients with schizophrenia. Methods : The education group consisted of twenty people who were families of inpatients with schizophrenia and who attended the brief program of family education. Ten people who were families of inpatients with schizophrenia and who didn't attend the brief program of family education comprised the comparison group. Four self=report questionnaires assessing global anxiety(Anxiety Questionnaire), worry related to patient(Worry Questionnaire), rejection feeling to patient(Rejection Questionnaire), and knowledge about schizophrenia(Knowledge Questionnaire) were administered to the education group and to the comparison group, twice at the pre-test and post-test. Results : 1) In the education group, scores of Knowledge Questionnaire(t=5.43, df=19, p<0.01) at the post-test were significantly higher than those at the pre-test. Scores of Worry Questionnaire(t=-3.03, df=19, p<0.01) and Rejection Questionnaire t=-2.34 df=19, p<0.05) at the post-test were significantly lower than those at the pre-test. In comparison group, scores of Knowledge Questionnaire were significantly higher at the post-test compared to those at the pre-test(t=1.86, df=19, p<0.05). However, the change in comparison group was not as divergent as in the education group. 2) Differences between the pre-test scores and the post-test scores in each questionnaire were sought. In the education group, significant negative correlation existed between calculated differences of Knowledge Questionnaire and Anxiety Questionnaire(r=-0.56, p<0.01), between Knowledge Questionnaire and Worry Questionnaire(r=-0.57, p<0.01), and significant positive correlation existed between Anxiety Questionnaire and Worry Questionnaire(r=0.55, p<0.01). In the comparison group, significant negative correlation existed between Knowledge Questionnaire and Worry Questionnaire(r=-0.60, p<0.05). 3) The author also assessed the relationship between calculated differences of the pre-test scores from the post-test scores in each questionnaire and demographic characteristics. In the education group, significant positive correlation existed between calculated difference of Anxiety Questionnaire nd duration of illness(r=0.39, p<0.05), between Anxiety Questionnaire and educational level of family(rs=0.43, p<0.05), between Worry Questionnaire and duration of illness(r=0.49, p<0.05) and between Worry Questionnaire and educational level of family(rs=0.45, p<0.05). In control group, significant positive correlation existed between Worry Questionnaire and age of family(r=0.64, p<0.05) and significant negative correlation existed between Worry Questionnaire and educational level of family(rs=-0.74, p<0.01). Conclusion : The brief program of family education was effective in increasing knowledge about schizophrenia, decreasing of worry related to the patients and rejection feeling about the patients in families of inpatienis with schizophrenia.

PCR-RFLP 분석에 의한 무의 자가불화합성 유전자의 비교

최장선,김영호,강권규 안성산업대학교 2002 論文集 Vol.33 No.-

Self-incompatibility of Raphanus sativus is controlled by a single multi-allelic locus(S locus), which contains at least two highly polymophic genes expressed in the stigma: an S glycoprotein gene(SLG) and an S recetor kinase gene(SRK). The putative ligand-binding domain of SRK exhibits high homology to the secretory protein SLG, and it is believed that SLG and SRK form an active receptor kinase complex with a self-pollen ligand, which leads to the rejection of self-pollen. Among fifty-one inbred lines of R. sativus, fourteen S haplotypes were identified on the basis of DNA polymorphisms detected by PCR-RFLP analysis using SLG and SRK specific primer. PCR amplification was detected band in SLG 1.1~1.2Kb, SRK Ⅰ 0.8~0.9Kb, SRK Ⅱ 1.2~1.3Kb by analysis of the agaros gel electrophoresis. All different S genotypes showed different profiles in agarose electrophoresis, after digestion with restriction endonucleases. The nucleotide sequences of the fragments of these fourteen R. sativus SLG and SRK alleles were determined. Degree of similarity of the nucleotide sequences to a Brassica SLG and SRK ranged from 87% to 94%. Amino acid sequences deduced from these show about 50-55% homology to the putative amino acid sequences of SLG and SRK.