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        • KCI등재

          국내 대기업의 개방형 혁신 저해요인에 대한 WFGM 관점 분석 사례

          조요한(Yo Han Cho), 류정호(Christopher J. Ryu), 임규건(Gyoo Gun Lim), 이대철(Dae Chul Lee) 한국데이타베이스학회 2012 Journal of information technology applications & m Vol.19 No.2

          Recently the open innovation is considered as one of the important issues for the survival strategy of a company in the industry. There have been several researches and practices on this topic. However, previous researches are mainly focused on the study of successful cases and some statistical analyses on the relationship between the open innovation and its performance. There are rare researches on the hindrance factors in the practical level. This paper tries to find some hinderance factors for the open innovation in Korean large-scale companies based on the WFGM(Want-Find-Get-Manage) model proposed by Gene Slowinski(2006). Especially this research focused on each processes of open innovation by in-depth interviews for two representative large companies in Korea. From the result of this research we come to know that the critical hindrance factor in the WANT step is the uncertain definition of the necessary technologies for the company. Issues on establishing and maintaining the innovation network are in the FIND step. Technology evaluation, technology introduction channel and technology copying issues are in the GET step. Communication issues, technology feasibility and lack of competition are in the MANAGE step. This paper finds some hindrance factors in each process step of open innovation, which gives some implications for the companies that want to adopt open innovation.

        • KCI등재

          선도기업과 후발기업에 따른 개방형 혁신활동이 기업성과에 미치는 영향에 관한 연구

          조요한(Yo Han Cho), 이대철(Dae Chul Lee), 임규건(Gyoo Gun Lim) 한국데이타베이스학회 2013 Journal of information technology applications & m Vol.20 No.2

          There have been many studies that open innovation activities have positive on firm performance. However, the previous studies have shown conflicting results, depending on the characteristics of companies or the timing of the product launch. This study empirically compares open innovation performance of first-mover companies and follower companies. The analyses are performed on the samples of the Korean Innovation Survey 2010 companies that explored external information and performed R&D cooperation. The results indicate that open innovation activities can have different effects depending on a company's status in the market. For the first-mover companies, the intensity of utilizing external information has greater impact on the firm's performance than the diversity of it. By contrast, for the follower companies, the diversity of utilizing external information has greater impact on the firm's performance than the intensity of it.. In terms of R&D cooperation, the external cooperation is found not to have significant effects on a first-mover company's performance. However, external R&D cooperation of a follower company is showing positive impact on the firm's performance. The implication of the study is to analyze the firm's Open-Innovation performance by comparing first-mover companies with follower companies. Therefore, companies need to execute the Open-Innovation strategy by considering firm characteristics or the timing of the product launch.

        • 웨이블릿 변환을 이용한 FBG 온도센서 신호의 정밀도 향상

          조요한(Yo-Han Cho), 박형준(Hyoung-Jun Park), 송민호(Minho Song) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7

          본 논문에서는 고속 파장훑음 레이저와 FBG (fiber Bragg grating)를 이용하여 전력설비 보호계전용 온도센서를 구현하였다. 고속 파장훑음 레이저의 불안정한 광세기 변화에 따른 FBG 반사파장 노이즈를 최소화하기 위하여 웨이블릿 변환(Wavelet transform)을 적용하였다. 최적의 임계값을 설정한 웨이블릿 변환의 노이즈 제거기법(denoising)을 통하여 FBG 센서의 파장변화에 따른 온도변화 정밀도를 향상 시켰으며 가우시안 라인피팅(Gaussian line fitting)을 적용하여 그 효율성을 입증하였다.

        • KCI등재

          호흡근 훈련이 뇌졸중환자의 폐기능과 수면의 질에 미치는 영향

          조요한 ( Yo Han Cho ), 이상빈 ( Sang Bin Lee ) 대한물리의학회 2015 대한물리의학회지 Vol.10 No.4

          PURPOSE: This study attempts to examine the impact of respiratory muscle exercises on the respiratory function and quality of sleep among stroke patients. METHODS: A total of 20 stroke patients were randomly divided into a breathing-exercise training group(n=10) and a breathing-device-training group(n=10). Changes in pulmonary function, as well as the quality, were measured before and after the intervention. The breathing exercise was performed three times a week for a total of eight weeks. Breathing-device exercises made use of a lung-capacity-strengthening device and were performed for three times a week for eight weeks. One Flow FVC was used as a measurement tool for the pulmonary function test. The Pittsburgh Sleep Quality Index(PSQI) and a sleep measurement tool were used for sleep evaluation. RESULTS: In a comparison of changes in pulmonary function before and after the training, the breathing-exercise group and the breathing-device-training group showed a significant difference. In changes of sleeping measure and PSQI, the breathing-exercise group and the breathing-devicetraining group also showed significant differences. CONCLUSION: Diverse index analyses confirmed that breathing exercises and exercises using a lung-capacitystrengthening device, were effective in improving respiratory function and quality of sleep among stroke patients experiencing respiratory function disorders and sleep disorders.

        • KCI등재

          다양한 빈혈에서의 혈중 적혈구생성인자 분비의 특성

          조요한 ( Yo Han Cho ), 안수영 ( Soo Young Ahn ), 김영백 ( Young Baek Kim ), 윤소영 ( So Young Yoon ), 이홍기 ( Hong Ghi Lee ) 대한내과학회 2008 대한내과학회지 Vol.74 No.5

          목적: 만성질환빈혈은 입원환자에서 가장 흔히 발생하지만 기저 질환의 범위나 병태생리가 명확히 정의되어 있지 않다. 저자는 이러한 빈혈을 포함한 다양한 빈혈에서 적혈구생성인자(EPO)의 분비의 특성을 알아보고 기저 질환별차이점과 분비에 영향을 주는 임상적 인자를 알아보고자 하였다. 방법: 2006년 3월 1일부터 2007년 4월 30일까지 건국대학교병원 종양혈액내과에서 빈혈(남: 혈색소<13 g/dL, 여: 혈색소<12 g/dL)로 진단된 환자를 대상으로 일반적 검사와 함께 혈중 적혈구생성인자(EPO) 값을 구하였다. 그리고 이들 환자에서 혈색소에 따른 EPO 분비의 적절성을 평가하여 질환별로 비교하였다. 결과: 총 161명의 환자가 연구에 포함되었다. 철결핍빈혈군(42명)에 비해 만성질환빈혈군(119명)에서 EPO의 분비가 유의하게 감소되어 있었다(p=0.000). 악성 종양군(20명)을 제외한 감염군(46명), 신부전군(27명) 외에도 심부전군(12명), 기타 질환군(14명) 모두에서 유의하게 EPO 감소가 관찰되었다. 연령별로는 65세 이상의 환자군이 65세 미만 환자군에 비해 유의하게 EPO의 분비가 저하되어 있었고(p=0.01), 신부전이 동반된 경우를 제외한 당뇨 환자군에서도 비당뇨 환자군에 비해 EPO의 분비가 저하되는 경향을 보였다(p=0.055). 결론: 만성질환 동반 빈혈을 포함한 여러 가지 빈혈은 EPO 분비가 감소되어 있었고, 또한 고령이나 당뇨 등이 EPO 분비를 감소시키는 경향을 보였다. 이러한 빈혈 환자에서의 진단적 EPO 측정 및 치료목적 투여에 대한 추가적인 연구가 앞으로 필요한 것으로 생각된다. Background/Aims: The characteristics of erythropoietin response in patients suffering with anemia of chronic disease and in the patients with various other anemias are poorly defined. Thus, we evaluated the clinical factors that influence the erythropoietin response. Methods: We enrolled the anemic patients (hemoglobin <13 g/dL for males and <12 g/dL for females) who visited the Hematology-Oncology department of Konkuk University Hospital from Mar 2006 to April 2007. The laboratory tests, including the complete blood count, serum ferritin, serum vitamin B12/folate, the peripheral blood morphology and serum erythropoietin, were done. The erythropoietin response to anemia was assessed by the ratio of the log of the measured erythropoietin to the log of the expected erythropoietin. Results: A total of 161 patients, including 42 iron-deficiency anemia (IDA) patients, were analyzed. 119 non-IDA patients were diagnosed with infection (n=46), chronic renal failure (n=27), cancer (n=20), heart failure (n=12), or with other diseases (n=14). Except for the cancer patients, all the patients with other diseases showed a blunted erythropoietin response in comparison with the IDA patients (p=0.000). Among the non-IDA patients, those patients older than 65 years showed more blunted erythropoietin response than did the younger patients (p=0.01), and the diabetics without renal dysfunction also tended to respond better to erythropoietin than did the non-diabetics (p=0.055). Conclusion: A blunted erythropoietin response was observed in most of the anemic patients in our study. Old age and diabetes may further blunt the erythropoietin response. The feasibility of erythropoietin testing and supplementation treatment in these patients merits further evaluation.(Korean J Med 74:531-536, 2008)

        • 청소년 웹툰중독에 대한 개관 및 웹툰 이용 현황 조사

          조요한(Yo-Han Cho), 고은정(Eun-Jeong Ko), 오준성(Jun-Sung Oh), 신성만(Sung-Man Shin) 한국심리학회 2018 한국심리학회지: 중독 Vol.3 No.1

          본 연구는 청소년들의 과도한 웹툰 이용 현상에 주목하여 청소년 웹툰중독의 가능성을 논하는 것을 목적으로 한다. 이를 위하여 기존 연구들의 개관과 함께 웹툰 이용 현황 조사 결과를 제시하여 근거를 더하였다. 웹툰 사용자의 49%를 차지하는 청소년들은 심리적 스트레스, 낮은 자기통제력, 충동성 등의 심리적 취약성을 가진다. 이는 청소년들이 다른 미디어처럼 웹툰에 중독될 수 있게 만드는 요인이 된다. 정보 및 사회적 상호작용 동기, 즐거움/편리성 동기, 현실도피/긴장해소 동기 등의 웹툰 이용 동기 또한 마찬가지로 청소년들이 웹툰에 중독될 수 있는 근거가 된다. 이를 설명하기 위해서 청소년의 기본심리욕구의 불만족과 동기간의 불균형을 이론적 배경으로 삼았다. 웹툰중독이 행동중독의 하위요인으로 개념화될 것을 고려하여 기존 행동중독의 개념화 과정을 살펴봄으로써 웹툰중독 연구의 앞으로의 방향을 제시하였다. 또한, 웹툰 이용 현황 조사를 통하여 웹툰중독 위험군 청소년과 일반 이용자군 청소년 사이의 차이를 교차분석을 이용해 밝혔다. 그 결과, 성별, 웹툰 이용 기간, 일평균 웹툰 이용시간, 웹툰 결제 여부, 웹툰 이용 만족도, 주위사람으로부터 중독이라는 충고를 들은 경험, 웹툰 이용으로 관계에서의 갈등 경험에서 유의미한 차이가 나타났다. 마지막으로 본 연구결과를 바탕으로 연구의 의의와 추후연구의 방향에 대하여 논의하였다. This study aims to discuss the possibility of adolescent webtoon addiction by paying attention to the phenomenon of excessive use of webtoon by young people. To this end, we have added the basis by presenting the results of the survey on the use of webtoon along with the overview of existing studies. Young people, who account for 49% of webtoon users, have psychological vulnerability such as psychological stress, low self-control, and impulsiveness. This is a factor that makes young people addict to webtoons like other media. The motivations for using webtoons such as information and social interaction motivation, pleasure/convenience motivation, and motivation to escape/relieve tension are also the basis for adolescents to be addicted to webtoons. To explain this, the dissatisfaction of the basic psychological needs and motivational imbalance of the youth was made as a theoretical background. Considering that webtoon addiction will be conceptualized as a subfactor of behavioral addiction, we have presented the future direction of webtoon addiction research by examining the conceptualization process of existing behavioral addiction. In addition, through the survey on the use of webtoons, the difference between the youth of the risk group of the webtoon addiction and the youth of the general user group was analyzed using cross analysis. As a result, there were significant differences in gender, duration of webtoon use, daily average webtoon usage time, whether to pay for webtoons, satisfaction with using webtoons, experience of advice about addiction from people around them, and conflict experience in relationships through using webtoons. Finally, based on the results of this study, we discussed the significance of the study and the direction of future research.

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