• 대한예방의학회:학술대회논문집
• /
• 대한예방의학회 1994년도 교수 연수회(역학)
• /
• pp.265-269
• /
• 1994

A brief review is presented of the strengths and weaknesses of historical controls, data banks, and randomized trials in the evaluation of clinical treatment. Use of pre randomized versus postrandomized informed consent is discussed. Recommendations are made for the development of an appropriate clinical research strategy.

• 한국막학회:학술대회논문집
• /
• 한국막학회 2000년도 춘계 총회 및 학술발표회
• /
• pp.51-54
• /
• 2000

• 한국막학회:학술대회논문집
• /
• 한국막학회 2000년도 춘계 총회 및 학술발표회
• /
• pp.63-66
• /
• 2000

• 대한지구과학교육학회지
• /
• 제13권2호
• /
• pp.186-195
• /
• 2020

본 연구의 목적은 초등학생들의 '계절의 변화'에 대한 Jigsaw 협동학습이 과제집착력 및 창의적 인성에 미치는 효과를 알아보는 데 있다. 연구 대상은 B시의 G초등학교 6학년 2개 반 48명을 대상으로 연구집단 24명, 비교집단 24명으로 구성하였다. 초등과학 6학년 '계절의 변화' 단원을 중심으로 12주간 실험처치를 하였다. 그리고 연구집단과 비교집단에서 사전-사후검사로 과제집착력 검사, 창의적 인성 검사를 하였다. Jigsaw 협동학습을 통해 자연스럽게 과제집착력 향상과 창의적 인성 함양이 될 수 있도록 연구절차를 설정하여 연구를 진행하였다. 이에 대한 연구 결과는 다음과 같다. 첫째, 초등학생들의 Jigsaw 협동학습은 과제집착력 향상에 효과가 있었다. 둘째, 초등학생들의 Jigsaw 협동학습은 창의적 인성 함양에 효과가 있었다. 셋째, 초등학생들의 Jigsaw 협동학습에 대한 인식은 긍정적으로 나타났다. 이러한 연구 결과를 통하여 Jigsaw 협동 학습이 과제집착력과 창의적 인성에 효과가 있으며 긍정적인 영향을 미친다는 것을 확인할 수 있다.

• 한국과학교육학회지
• /
• 제17권3호
• /
• pp.313-321
• /
• 1997

The purpose of this study was to investigate the instructional effect of a four-stage problem solving approach visually emphasizing the molecular level of matter upon students' conceptions and problem solving ability. On the basis of the research results regarding molecular representation in learning chemistry, problem-solving instruction, and the effect of visual materials, the instructional strategy was developed while considering Korean educational situations. The treatment and control groups (2 classes) were selected from a girls' high school in Seoul and taught about stoichiometry, gas, liquid, solid, and solution for 13 weeks. For the treatment group, 52 charts were supplied in order to emphasize the molecular level of matter and/or 4 stage problem solving strategy-understanding, planning, solving, and reviewing. For the control group, traditional instruction was used. Before the instructions, the Group Assessment of Logical Thinking and the Spatial Ability Test were administered, and their scores were used as covariate and blocking variable, respectively. After the instructions, students' conceptions and problem solving ability were measured by the Chemistry Conceptions Test (CCT) and the Chemistry Problem Solving Ability Test (CPSAT), respectively. The results indicated that the CCT scores of the treatment group were significantly higher than those of the control group. The students in the treatment group also exhibited less misconceptions than those in the control group. However, there was not significant difference for the CPSAT scores. No interaction with students' spatial ability was found for both students' conceptions and problem solving ability. Educational implications are discussed.

• 한국환경과학회지
• /
• 제15권7호
• /
• pp.677-688
• /
• 2006

Currently, the application of $TiO_2$ photocatalyst has been focused on purification and treatment of wastewater. However, the use of conventional $TiO_2$ slurry photocatalyst results in disadvantage of stirring during the reaction and of separation after the reaction. And the usage of artificial UV lamp has made the cost of photocatalyst treatment system high. Consequently, we studied that solar light/$TiO_2$ film system was designed and developed in order to examine disinfection characteristics of sewage wastewater treatment. The optimum conditions for disinfection such as solar light intensity, characteristic of sewage wastewater, amounts of $TiO_2$ and comparison of solar ligth/$TiO_2$ systems with UV light/$TiO_2$ system was examined. The results are as follows: (1) photocatalytic disinfection process with solar light in the presence of $TiO_2$ film more effectively killed total coliform (TC) than solar light or $TiO_2$ film absorption only. (2) The survival ratio of TC and residual ratio of organic material (BOD, CODcr) decreased with remain resistant material. (3) The survival ratio of TC and residual ratio of organic material (BOD, CODcr) decreased with the increase of amounts of $TiO_2$. (4) TC survival ratio decreased linearly with increasing UV light intensity. (5) The disinfection effect of solar light/$TiO_2$ slurry system decreased more than UV light/$TiO_2$ film systems. (6) The disinfection reaction followed first-order kinetics. We suggest that solar light instead of using artificial UV light was conducted to investigate the applicability of alternative energy source in the disinfection of TC and the degradation of organic material.

• The Plant Pathology Journal
• /
• 제29권3호
• /
• pp.294-304
• /
• 2013

To improve the integrated pest management (IPM) of hot pepper, field study was conducted in Hwasung from 2010 to 2012 and an IPM system was developed to help growers decide when to apply pesticides to control anthracnose, tobacco budworm, Phytophthora blight, bacterial wilt, and bacterial leaf spot. The three field treatments consisted of IPM sprays following the forecast model advisory, a periodic spray at 7-to-10-day intervals, and no spray (control). The number of annual pesticide applications for the IPM treatment ranged from six to eight, whereas the plots subjected to the periodic treatment received pesticide 11 or 12 times annually for three years. Compared to the former strategy, our improved IPM strategy features more intense pest management, with frequent spraying for anthracnose and mixed spraying for tobacco budworm or Phytophthora blight. The incidences for no pesticide control in 2010, 2011, and 2012 were 91, 97.6, and 41.4%, respectively. Conversely, the incidences for the IPM treatment for those years were 7.6, 62.6, and 2%, and the yields from IPM-treated plots were 48.6 kg, 12.1 kg, and 48.8 kg. The incidence and yield in the IPM-treated plots were almost the same as those of the periodic treatment except in 2011, in which no unnecessary sprays were given, meaning that the IPM control was quite successful. From reviewing eight years of field work, sophisticated forecasts that optimize pesticide spray timing reveal that reliance on pesticides can be reduced without compromising yield. Eco-friendly strategies can be implemented in the pest management of hot pepper.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제47권2호
• /
• pp.112-119
• /
• 2021

Objectives: Myxomatous odontogenic tumors (MOTs) are the third most common odontogenic tumors in the oral and maxillofacial region. Due to its slow-growing, but locally invasive nature, the tumor is usually detected by accident or only when it becomes a large mass, which causes facial deformity. Materials and Methods: Current study reports three unusual cases of MOT including huge myxoma involve the mandible in middle-aged man, MOT with ossifying fibroma pattern in mandible, and MOT in maxilla of young female patient. The diagnosis and treatment strategy of MOTs was also summarized and updated. Results: In reported three cases of patients with large MOTs, surgical treatment was indicated with fibular free flap reconstruction in the mandible and plate reconstruction in the maxilla. The tumors were successfully treated with radical resection and did not show signs of recurrence during the follow-up period. Conclusion: Surgical treatment indication depends on size, the position of the lesion, patient systemic condition and surgeon individual experience. In the case of a large tumor, radical resection and reconstruction is the standard surgical strategy. The conservative surgical treatment including enucleation with wide curettage is still under controversy. The recurrence rate for MOTs is significantly high, up to 30%, therefore long-term follow-up is essential.

• 한국과학교육학회지
• /
• 제28권6호
• /
• pp.675-684
• /
• 2008

이 연구에서는 다중 표상을 활용한 화학 개념 학습에서 연계 오류 감소를 위한 처방적인 교수 전략의 효과를 학생들의 장독립성-장의존성에 따라 조사했다. 남녀공학 중학교 1학년 126명을 통제 집단과 처치 집단으로 배치한 후, '보일의 법칙'과 '샤를의 법칙'에 대해 2차시 동안 수업을 진행했다. 연구 결과, 개념 이해도 검사에서 처치 집단의 점수가 통제 집단의 점수보다 통계적으로 유의미한 차이로 높았다. 학습 동기 검사에서는 학습 동기 전체와 하위 영역 중 '주의집중' 영역에서, 처치 집단 학생들의 점수가 통제 집단 학생들의 점수보다 통계적으로 유의미한 차이로 높았다. 그러나 두 검사에서 모두 수업 처치와 장독립성-장의존성 사이의 상호작용 효과는 없었다. 처치 집단 학생들의 대부분이 새로운 교수 전략에 대해 인지적, 동기적 측면에서 긍정적으로 인식하는 것으로 나타났다.

• 대한간호학회지
• /
• 제28권2호
• /
• pp.479-489
• /
• 1998

This work was done for 9 patients having experience of a herb medical treatment after being diagnosed as CVA during a year from January, 1996 to December, 1996 by using an ethnographic research method. The summarized results of this research are following. Ⅰ. THE EXPERIENCE OF THE ILLNESS First, the falling-ill phase is the time that they have the first stroke of paralysis and the decision pattern of medical institution' comes out. The emotional experience in the period is something like 'flustration', 'anxiety', 'despair', and 'expectation'. Second, the active-treatment phase is the time that the patients as well as their family or care giver not only show the positive attitude and actively participate in the illness treatment but also show a lot of interest in medical institutions and activities of health recovery. There is a primary factor of the continuation of treatment as an experience of treatment and being crushed and sensitivity as an experience of the illness. Third, the rehabilitation phase is the time that the patients or their family become tired and insensitive to the treatment and recuperation, and then reduce the treatment activity. There is a primary influence factor of the discontinuance of treatment as an experience of treatment and physical experience and emotional experience as an experience of the illness. The physical experience is divided into 'personal-hygiene care', and 'the sphere of activity' The emotional experiences are 'blaming someone', 'contempt' and 'despair' as a negative experience and 'hope' as a positive experience. Ⅱ. COPING STRATEGY There are a physical coping, an emotional and mental coping, a social coping, and a spiritual coping as a coping strategy used for the patients to overcome their illness and adjust themselves to their altered life. First, the physical coping comes out as 8 categories, 'using an auxiliary tool', 'doing exercise', 'protecting', 'improving their diet', 'taking care of something', 'using subsidiary medicines', 'trying a folk remedy', and 'having interest in their health'. Second, for the emotional and mental coping, there are 'accepting' and 'trying' as a positive coping and a failure of control as a negative coping. Third, the social coping is appeared as 'being supported'. Fourth, the spiritual coping is recognized as' recourse to God' and 'preparation of death'. After all, the elderly CVA patients in an agricultural area choose the act of treatment based on the traditional belief and the relationship with a caretaker. A personal health can be maintained by taking care of themselves and controling their mind, and the overcome of the illness is decided on the basis of traditional concepts and cultural principles in which the patients as well as the family, neigbors and take carers should work out together and cooperate with each other in order to achieve that.