• 대한의용생체공학회:의공학회지
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• 제38권6호
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• pp.277-284
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• 2017

This paper presents an implantable pH measurement electrode for wireless gastroesophageal reflux measurement. Usually, gastroesophageal reflux is diagnosed by a catheter-type wire connection between the esophagus and the diagnostic device which brings many side effects such as restriction of daily living, pain, and discomfort in the nasal cavity and pharynx of patients. In order to solve these issues, researchers have been studied a wireless measurement method and a micro-sized pH electrode for human body insertion is necessary. Commercial glass packaged pH meter is formed by a sensing and a reference electrodes in a KCl solution. However, if the glass meter is inserted into the human body, there are risks of leakage of the solution, breakage of the glass package, injury of the body elements. Therefore, the solution should be solidified on the micro-sized noble metal wire which has a characteristic of biocompatible. After solidified wire fabrication, the designed meter was tested for feasibility of measurement and the result was well agreed with pH values of commercial pH meter. Potentials in pH 1 to 12 solution was measured to obtain the sensitivity of the sensor with linearity. And we have designed a simulation of gastroesophageal reflux with symptom frequency, interval, and duration time in pH 2 solution. The proposed sensor has capable to get the same potential for 24 measurements in 3 days, and it has sensed same pH values of 2 for one hour with every 10 minutes. Furthermore, the sensor was survived for 48 hours with reasonable potentials in the acid solution.

• 대한환경공학회지
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• 제27권6호
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• pp.642-650
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• 2005

이 연구는 초음파에 의한 1,4-dioxane(1,4-D)의 제거효율의 증가를 위해 $Fe^0$, $Fe^{2+}$, 그리고 ${S_2O_8}^{2-}$와 같은 산화제의 효과를 조사하였다. 실험의 결과 초음파 반응은 속도론적으로 도입단계와 가속단계의 두 부분으로 구분될 수 있었고, 도입단계는 0차 속도 반응 모델, 가속단계는 유사일차 반응 속도 모델에 부합하였다. OH 라디칼의 scavenger인 ${HCO_3}^-$의 존재 하에 1,4-D와 TOC의 분해속도는 감소하였으며, 이는 OH 라디칼이 초음파 반응에서 중요한 요소이라는 것을 의미한다. 초음파 반응에서 반응시간 200분 동안 79.0%의 1,4-D의 감소된 반면에 $Fe^0$, $Fe^{2+}$, 그리고 ${S_2O_8}^{2-}$가 첨가제로 첨가된 경우는 같은 반응시간 동안 각각 18.6%, 19.1%, 그리고 16.5%의 1,4-D의 제거효율의 증가를 보였다. 또한 첨가제들의 투입으로 도입단계의 반응을 0차 반응에서 유사 일차 반응으로 변화시켰으며, 가속 단계에서의 반응 속도를 증가를 가져 왔다. 또한 초음파 반응에 산화제의 첨가에 의해 1,4-D의 무기화의 정도도 증가되었다. 그러나 첨가되는 산화제의 종류에 관계없이 반응속도의 증가는 별 차이를 보이지 않았다.

• The Journal of Korean Physical Therapy
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• 제18권1호
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• pp.1-10
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• 2006

Purpose: This study was to investigate how induced microcurrent shoes affect relief of feet pain, which often occurs to persons who are more than fifty years old and how they prevent fatigue of feet generated during everyday life. The subjects of this study were comprised af five males and five females, who agreed with this research and ate more than fifty years old. And they all have plantar faciitis and pain in their feet. Methods: Subjects ware the induced microcurrent shoes far more than 4 hours everyday during the test. When they wore those shoes, they also wore the specially produced shacks made of silver-mixed thread and they were asked to avoid serious exercise. Prior to starting test and after the test, assessments were carried out two times. In the examination before the test, general shoes were used and in examination after the test, induced microcurrent shoes used. Muscle fatigue was measured by electromyography(MP150, Biopac, USA). When the walking rate of subjects on a treadmill was increased from 2.Km/h to 3Km/h for 10 minutes, muscle activities of a lower leg were measured during the whale walking process by MP150 remote monitoring system(TEL 100C). And pain was measured by VAS. Results: The results are as follows. 1. Comparisons of VAS before and after experimentation showed that degree of pain was significantly decreased(p < .05). 2. Degree of fatigue of Tibialis anterior was significantly decreased after 6 weeks of treatment(p < .05). 3. Degree of fatigue of Soleus was slightly decreased after 6 weeks of treatment, but did not show significant difference (p > .05). Conclusion: The above results suggest that induced microcurrent shoes is helpful decreasing fatigue of feet and relief of feet pain.

• Child Health Nursing Research
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• 제7권4호
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• pp.421-433
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• 2001

The purpose of this phenomenological study was to understand the lived experience of mothers of children with muscular dystrophy. The participants were 11 mothers recruited by snowball sampling, who agreed with the objectives of the research and could verbally communicate with the researcher and who lived with their sons who had muscular dystrophy. Data collection was done through in-depth interviews with participants in their own homes. Each interview took 50 to 120 minutes. All of the interviews were audiotaped and then transcribed. Data were analyzed using Colaizzi's (1978) method of phenomenology. From the transcripts 109 significant sentences and phrases were selected and 13 clusters of themes were categorized from 67 significant statements. These results were integrated into the essential structure of the lived experience of mothers of children with muscular dystrophy. 1. Anxious and relying on chance due to indefinite diagnosis. 2. Only able to cry with shock because of son's fatal disease. 3. Seeing the future as dismal and feeling resentment that this disease in transmitted through the mother. 4. Feeling caught between a husband who is distancing himself from his family and the family which is disintegrating. 5. Feeling like a sinner for transmission of genetic disease(Feeling guilt for conceiving a son with a genetically transmitted fatal disease). 6. Empathizing with other suffers of muscular dystropy and their parents in their grief and helping to dissipate their heavy feelings. 7. Deciding to sacrifice self as a way of taking responsibility for giving birth to a handi-capped son. 8. Losing hope (feeling despair) as son's condition deteriorates in spite of all attempts to help him. 9. Wishing to die with son who becomes progressively immobile. 10. Accumulating Han*(한, 恨), because of rising Hwa(화, anger), and becoming sick both mentally and physically. 11. Seeing events as destiny and finding self-control through faith. 12. Finally, giving up sacrificing self for son and becoming concerned(involved) with other children in the family. 13. Feeling fear at son's impending death. This is the first research on the experience of Korean mothers of children with muscular dystrophy. In applying the phenomenology research method, this study not only helps health professionals understand the experience of these mothers in the Korean patriarchal social system, but the researcher, as a nurse, can share their agony and grief through identification of their inner world through in-depth personal interviews. The results obtained in this study will not only help in the development of family nursing practice for families with genetically transmitted diseases but also prepare basic data for family nursing practice in the Korean sociocultural context.

• 대한통합의학회지
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• 제3권4호
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• pp.11-21
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• 2015

Purpose : The purpose of this study was to provide the material about the treatment effect of hand function training and writing training being performed as a part of treatment to improve the function of the non-dominant hand of the patients whose dominant hand is damaged and thus need to improve their non-dominant hand's function. Method : During one month of November, 2013, this study randomly chose five study subjects for hand function training, five for writing training, and ten of control group from 20 normal male and female adults going to K Univ. in Busan. All study subjects fully understood all of the training course, agreed to take the test in this study, and volunteered to participate in the test. Each training was performed five times for two weeks, 30 minutes each time. For measurement, Purdue pegboard was used to look into the change of hand dexterity. To investigate an improvement in hand function through hand function training and writing training, this study conducted early evaluation before training, interim evaluation, and final evaluation. Result : First, according to the comparison of dominant hand dexterity by group and by method during a training period, the groups of hand function training and of writing training improved dominant hand dexterity more than the control group. Secondly, according to the comparison of non-dominant hand dexterity by group during a training period, the groups of hand function training and of writing training improved dexterity more than the control group. According to the comparison of non-dominant hand dexterity by method during a training period, there was no big difference in dexterity between the groups of hand function training and of writing training and the control group. But, the group of hand function training showed a further improvement. Thirdly, according to the comparison of both-hand dexterity by group and by method during a training period, the groups of hand function training and of writing training improved both-hand dexterity more than the control group. Fourthly, according to the comparison of both-hand handling ability by group and by method during a training period, the groups of hand function training and of writing training improved both-hand handling ability more than the control group. Conclusion : Given the study result, it is considered that hand function training and writing training help brain damaged patients improve their hand function for their daily activity. And it will be meaningful to research brain damaged patients' motor skills after their brain damage, and the patients who have low abilities of visual perception and cognition. In the future, it will be necessary to secure more study subjects and perform systematic training during a sufficient test period.

• 대한통합의학회지
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• 제3권4호
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• pp.1-9
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• 2015

Purpose : We described how the training of non-dominant hand that applicates the activity effects on dominant hand. Method : From November 6th to December 2nd 2013, We randomly selected 18 people that don't have a damage of hand function and are in college of K in Busan. (cross stitch training group 9 people, control group 9 people) All participants agreed on the research after fully being aware of training procedures and spontaneously conducted. Each training was practiced for 40 minutes in once every second day. One researcher deals with three participants at silent environment. We used the study measurement, Purdue pegboard, to investigate the sharpness of hand. To investigate the advancement of hand function caused by cross stitch training, we practiced three times estimations of primary one before training, middle one after 2 weeks training, last one after four weeks training and obtained the following results. Result : First of all, We found that the group of hand training appeared to be advanced of dominant hand's sharpness depending on the training period more than the control group. Second, We found that the group of hand training appeared to be advanced of non-dominant hand's sharpness depending on the training period more than the control group. Third, We found that the group of hand training appeared to be advanced of both hand's sharpness depending on the training period more than the control group. Fourth, We found that the group of hand training appeared to be advanced of the assembling function sharpness depending on the training period more than the control group. Conclusion : Put the results of this research together, we found that non-dominant hand training that used the activity was of help to advance the function of dominant hand. So, we thinks that hand training might help the recovery of affected hand function to the person that have a problem of hand function like hemiplegia patient. It will be required to practice the further study targeting the person that have a problem of hand function like hemiplegia patient. We hope that this research will be apply to clinical occupational therapy.

• 한국과학교육학회지
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• 제33권7호
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• pp.1403-1417
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• 2013

본 연구에서는 과학자들의 상상력에 대한 인식과 과학 연구 과정에서 나타나는 과학적 상상력의 특성을 탐색하였다. 문헌 연구를 바탕으로 상상력의 개념과 특성을 도출한 뒤, 실제 과학자를 대상으로 상상력에 대한 인식과 연구 과정에서 강조되는 상상력의 특성을 알아보았다. 연구 참여자로는 스노우볼 표집을 통해 국내 과학자 8인을 선정하였으며, 개별 심층 면담을 통해 자료 수집이 이루어졌다. 면담은 주로 60-90분 동안 진행되었으며, 면담 내용은 모두 전사하여 분석 자료로 사용하였다. 면담 질문은 상상력에 대한 인식과 연구 과정에서 상상력이 발휘되었던 경험과, 상상력의 역할 등을 물어보는 반 구조화된 형식으로 구성하였다. 연구 결과, 과학자들은 상상력이 과학 연구 활동에서 중요한 역할을 한다고 인식하고 있었으며, 상상력에 대하여 긍정적인 관점을 지니고 있었다. 특히 과학자들은 상상력이 인간이 지니고 있는 특성으로 바라보았으며, 상상력의 개념을 폭넓게 이해하는 현대적 관점을 지니고 있었다. 연구 과정에서 강조되는 상상력의 특성은 문헌 연구에서 나타나는 상상력의 특성과 일치하였으며, 크게 세 가지로 분류하였다. 첫째, 과학자들의 상상력은 경험을 통한 지적 호기심과 궁금증이 원동력으로 작용한다는 것이다. 둘째, 과학적 상상력이 발휘되는 과정에서 창의적 특성이 나타난다. 셋째, 과학적 상상력은 과학 지식을 기반으로 현실 가능성을 고려하며, 새로운 것을 산출하는 특성을 지닌다. 연구 결과를 바탕으로 결론에서는 과학적 상상력의 특성을 도출하고, 그 의미와 함께 과학 학습에서의 상상력 활용 방안에 대하여 논의하였다.

• 디지털융복합연구
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• 제11권3호
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• pp.337-344
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• 2013

본 연구의 목적은 유산소성 운동프로그램 참여가 시각장애인의 호흡순환기능 및 동맥파속도에 어떠한 영향을 미치는가를 규명하기 위한 목적으로 수행되었다. 본 연구의 목적을 인지하고 참여의사를 밝힌 1급 시각장애인 20명이었으며, 보호자를 통하여 피험자 참여의 동의서를 받았다. 이들은 유산소성운동집단 10명과 통제집단 10명으로 무선배정으로 분류하였다. 유산소성운동집단은 12주동안 50-70%HRmax 강도로 주 5회 1일 준비운동, 본운동, 정리운동 총 60분으로 실시하였다. 본 연구의 자료처리는 독립변인으로 한 반복측정에 의한 이원변량분석(two-way repeated ANOVA)을 실시하였으며, 상호작용 효과를 검증하기 위해 paired t-test를 실시하였으며, 통계적 유의수준은 p<.05로 설정하여 다음과 같은 결론을 얻었다. 첫째, 실험집단에서 체중과 체지방률은 사전과 비교하여 사후 유의한 감소를 나타냈다(p<.05). 둘째, 실험집단에서 최대산소섭취량, 최대심박수, 최대환기량은 사전과 비교하여 사후 유의한 증가를 나타냈다(p<.05). 셋째, 실험집단에서 동맥파속도는 사전과 비교하여 유의한 증가를 나타냈다(p<.05), 넷째, 실험집단에서 수축기혈압은 사전과 비교하여 사후 유의한 감소를 나타내지 않았다(p>.05). 이상의 결과를 종합해 볼 때 유산소성 운동프로그램 참여는 호흡순환기능 및 혈류순환과 혈관기능 개선에 효과적으로 나타났다.

• 한국과학교육학회지
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• 제33권5호
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• pp.1007-1020
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• 2013

본 연구는 과학-예술통합 수업을 진행하고 있는 초등 교사들의 과학-예술통합 활동에 대한 인식과 수업의 접근법, 어려움 및 개선방안을 탐색하는 것을 목적으로 한다. 이를 위하여 초등학교 3학년에서 6학년을 담당하는 교사 12명을 연구 참여자로 선정하였다. 자료 수집은 연구 참여자와의 심층 면담을 통해 이루어졌으며, 면담 시간은 60분에서 90분으로 이루어졌다. 면담은 연구 참여자의 과학-예술통합 수업에 대한 인식과 수업에서의 목표 및 강조점, 어려움 및 개선방안 등을 물어보는 형식으로 이루어졌다. 연구 결과, 초등 교사들은 과학-예술통합 수업이 과학 개념의 재정리, 긍정적인 태도 향상, 적극적인 수업 참여 유도, 자유로운 의사표현의 긍정적인 교육적 효과를 지니고 있다고 인식하고 있었다. 또한 수업 접근법에서는 교사들은 과학 개념의 재정리, 추상적 과학 개념의 시각화, 예술 과목과의 연계의 세 가지 측면에서 과학-예술통합 활동을 수업에 적용하고 있었다. 한편 초등 교사들은 수업 자료의 부족과 외부 환경의 제약, 학생간의 편차로 인해 과학-예술통합 활동을 활용하는 데에 어려움을 겪고 있었다. 이러한 교사들의 인식은 다양한 수업 자료의 보충 및 교사의 역량 강화 필요성에 대한 요구로 이어졌다. 결론 및 제언에서는 이상의 연구 결과를 바탕으로 초등 교육에서 과학-예술통합 수업에 대하여 시사점을 논의하였다.

• 대한지구과학교육학회지
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• 제11권3호
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• pp.203-211
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• 2018

본 연구의 목적은 프로젝트 기반 수업을 활용한 과학수업이 과학개념 습득 및 과학학습동기에 미치는 효과를 알아보는 것이다. 본 연구는 S초등학교에서 4학년 학생을 대상으로 하였으며 연구반 선정을 위해 담임교사에게 동의를 구하였다. 그리고 학생들에게는 본 연구의 목적과 취지를 설명하고 연구에 대한 동의를 받았다. 연구자가 직접 내방하여 연구반 1개반을 선정하였다. 연구반에 대해서는 담임교사를 실험처치자로 선정하여 프로젝트 기반 수업을 활용한 과학수업을 진행하였다. 연구기간을 설정하여 40분 단위 수업을 12주 동안 실시하였다. 실험처치 수업 후에는 사후 과학개념 검사, 과학학습동기 검사를 실시하고 자료를 수집 분석하여 정리하는 단계로 진행하였다. 이에 대한 연구결과는 다음과 같다. 첫째, 프로젝트 기반 수업을 활용한 과학수업이 과학개념 습득 향상에 긍정적인 효과가 있었다. 둘째, 프로젝트 기반 수업를 활용한 과학수업이 과학학습동기 함양에 긍정적인 효과가 있었다. 셋째, 프로젝트 기반 수업 후 연구집단의 학습자들 인식 반응에서도 긍정적인 효과가 있었다.