• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 추계학술대회
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• pp.475-478
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• 2011

차량 운전자는 안전을 위해 항상 자신의 차량의 상태를 점검하고 파악하는 것이 필수이다. 하지만 운전자가 차량의 상태를 알고자 한다면 전문 업체에게 의뢰하기 때문에 운전자는 시간과 금전적인 비용이 지불되어야 한다. 오늘날 빠르게 변화하는 IT기술의 발달로 인해 스마트폰의 다양한 기능을 이용하여 차량의 상태 점검을 할 수 있게 되었다. 하지만, 기존 스마트폰 자동차 진단 시스템은 자동차의 전문적인 지식을 학습해야 차량 상태를 알 수 있기 때문에 사용자들에게 진단기의 필요성이 부각되지 않는다. 이러한 점을 반영하여 스마트폰을 이용해 사용자들이 손쉽게 자신의 차량 상태를 한 번에 파악할 수 있는 시스템이 요구된다. 본 논문에서는 OBD-II 프로토콜 변환 WiFi 커넥터를 통해 받아오는 OBD-II 정보를 차량 운전자에게 필요한 차량 소모품 교체 주기의 점검, 차량 문제점 진단 정보를 사용자에게 실시간으로 보여주며 손쉽게 사용할 수 있는 자동차 소모품 구현을 IOS 기반 스마트폰에서 구현 하였다.

• 대한후두음성언어의학회지
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• 제31권1호
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• pp.19-26
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• 2020

Background and Objective Endoscopic airway dilation is the primary treatment for pediatric subglottic stenosis (SGS) due to its feasibility and non-invasiveness. The aim of this study is to evaluate the risk factors for the failure of endoscopic airway dilation in pediatric patients with SGS. Materials and Methods This study reviewed medical records of 38 pediatric patients had endoscopic dilation from a single and tertiary referral center, retrospectively. The success of the endoscopic dilation procedure was defined as no dyspneic symptom without tracheostomy or laryngotracheal reconstruction. Demographic profiles, underlying disease, and Myer-Cotton SGS severity grade were recorded. Success rates and risk factors for the failure of treatment were analyzed. Results The SGS patients with severity grade I was most common. After mean 1.8 numbers of procedures, there were 23 patients (60.5%) in the success group and 15 patients (39.5%) in the failure group. Age, sex, underlying diseases, and SGS severity grade were not significantly different between two groups. In patients who had multiple endoscopic procedures, the failure group showed SGS deteriorated after procedures in 66.7%, compared to 11.1% of the success group. In multivariable analysis, a long-term intubation (≥1 month) was identified as an independent risk factor for failure of endoscopic dilation procedure. Conclusion Although endoscopic dilation procedure is safe and effective for the management, repetitive endoscopic dilation may not give clinical benefit in patient with long-term intubation. Other airway procedures must be considered in those group of patients.

• 한국산학기술학회논문지
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• 제12권11호
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• pp.5012-5018
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• 2011

1965년부터 1995까지 결핵의 전국적인 조사에 의하면, 한국에서 결핵의 발생과 약제 내성율은 감소하였지만 다재약제내성율의 유행은 여전히 심각한 문제이다. 본 연구의 목적은 2001 년부터 2008까지 대전에 약제 내성율과 성향을 조사하였다. 총 581건의 약제감수성 검사가 수행 되었으며 이중 하나이상의 항결핵제의 약물에 내성이 있는 경우가 104건(17.9%)이였고 적어도 INH에 내성이 있는 경우가 68건 (11.7 %), RFP내성이 41건(7.1 %)이였다. 단일 약제 내성율은 37건 (6.4 %) 분리되었으며 이들 중 INH에서 18건 (3.1 %) RFP에서 5건(0.9 %)이 분리 되었다. 적어도 isoniazid와 refampin에 내성인 다제내성결핵은 35건(6.0 %)에서 발견되었다. 그리고 MDR - TB와 관련된 나이요인에 40-60 세 포함되었다. 폐결핵의 약제내성율, 특히 MDR - TB의 약제내성율은 공공의료분야보다 민간 병원의 초치료 환자에서 높게 나왔다. 초기 약제내성은 일반적이며 약제감수성 검사는 이전 결핵 치료를 받지 않은 폐결핵 환자에 대해 유용성이 있다. 내성의 확산과 증가를 줄이기 위해 MDR - TB의 조기 진단과 함께 향상된 제어프로그램이 필요하다. 다제내성율은 여전히 한국에서 문제이다. 독립적으로 혹은 공공의료분야와 공동으로 다제내성율을 감소하기 위한 노력이 필요하다.

• 한국산학기술학회논문지
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• 제17권9호
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• pp.464-471
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• 2016

본 연구는 심근경색 환자에서 젊은 환자군과 60세 이상의 노인 환자군에서 심장 재활이 심폐운동 기능에 미치는 효과를 비교하고자 하였다. 2012년에서 2015년까지 심장 재활을 실시하였던 환자 중 외래 경과 관찰중인 환자의 기록을 후향적으로 분석하였다. 총 46명 (60세 이상의 노인 18명, 28명의 60세 미만의 젊은 환자군)이 연구에 포함되었다. 대상자들은 초기 운동부하 검사 결과를 바탕으로 심장재활 치료실에서 심전도 감시 하에 유산소 운동요법을 시행하였다. 심폐기능은 심장재활 실시 전, 후로 운동부하 검사에 의해 평가되었다. 심장재활을 실시하기 전 시행한 운동 부하 검사에서 최대 산소소모량, 최대 운동시의 신진대사 해당치, 무산소 역치 지표 등이 60세 이상의 노인에서 의미 있는 운동 기능 저하가 관찰되었다(p<0.05). 심장재활 전과 후의 운동 능력을 비교하였을 때, 두 군에서 최대 운동 가능시간, 최대하 심근부담률, 최대 심박수, 안정시 심박수, 최대 산소 소모량, 최대 산소소모량 측정시의 최대 환기량, 최대 운동시의 신진대사 해당치, 무산소 역치 지표에서 통계학적으로 유의한 변화가 관찰되어(p<0.05), 심장재활 후 두 군 모두에서 운동기능의 개선의 효과가 있었다. 60세 이상 군과 60세 미만 군 두 군 사이에서 심장재활 전과 후의 운동능력 지표 변화율의 상대적인 비교 시에 최대 운동 가능시간, 최대 산소 소모량, 최대 운동시 신진대사 해당치, 무산소 역치 지표 등의 모든 운동 부하 검사 결과는 유사한 호전을 보였다. 한국에서 노인 환자의 심장재활 참여율과 전과율은 낮은 상태이다. 60세 이상의 노인 환자에서의 심장재활의 참여를 확대하는 것이 필요할 것으로 생각된다.

• 유통과학연구
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• 제12권8호
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• pp.123-132
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• 2014

Purpose - Recently, Korean companies have been struggling to perform well in the larger smartphone market in China, which is regarded as a blue ocean area. First, it is very important to accurately understand the Chinese consumers, who have a different consumption culture and value system from the Korean culture and system. This would help to identify priorities for the Chinese market. Further, considering the smartphone industry, where technological change is rapid, Korean companies will need to take prompt measures about market trends in order to establish strong competitiveness. Consequently, this study focused on analyzing the relationship between the variables of consumption value, satisfaction, and loyalty in the Chinese smartphone market. The principal dimensions of consumption value, which smartphones have, was analyzed, and the influence on satisfaction was identified. Moreover, the relationship among the variables of satisfaction, attitudinal loyalty, and behavioral loyalty was empirically analyzed. Research design, data, and methodology - This study examined the relationships between various consumption values (functional value, emotional value, social value, epistemic value, and economic value), along with satisfaction and loyalty. The data were collected through a questionnaire survey that was circulated to 310 customers who were users of smartphones in Chingdao and Yeontae regions in China. The survey was conducted from June 23 to August 4, 2013. A total of 301 responses to the questionnaires were collected and used for the data analysis. Moreover, a path analysis based on Lisrel 8.54 was used for the hypothesis test. Results - The variables of functional value, emotional value, social value, and epistemic value were revealed to have positive effects on satisfaction related to smartphone usage. However, the variables of monetary cost and psychological cost were not found to have negative effects on satisfaction related to smartphone usage. Moreover, satisfaction positively influenced attitudinal loyalty related to smartphone usage, but did not have a significant influence on behavioral loyalty related to smartphone usage. Specifically, satisfaction is essential, but not a sufficient condition for building behavioral loyalty in relation to smartphone usage. In addition, attitudinal loyalty positively influenced behavioral loyalty in relation to smartphone usage. Conclusions - First, this study shows that functional value, emotional value, social value, and epistemic value in relation to smartphone usage are important for marketing in the Chinese smartphone market. Particularly, functional value and emotional value play pre-eminent roles as regards customer loyalty in the use of smartphones. Second, the results of this study reveal that the variables of monetary cost and psychological cost are not important to the Chinese consumers. Specifically, the smartphone price and cognitive effort are not perceived as value barriers. Third, satisfaction did not guarantee behavioral loyalty in relation to smartphone usage, and the strategic approach for improving the repurchase and referral action in relation to smartphones based on solid attitudinal loyalty would be desirable and should be the focus of the marketing activities of Korean smartphone companies.

• Journal of Korean Medical Science
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• 제33권47호
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• pp.292.1-292.10
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• 2018

Background: We investigated the incidence of active tuberculosis among patients with inflammatory bowel disease (IBD) treated with tumor necrosis factor (TNF) inhibitors, with or without latent tuberculosis infection (LTBI). Methods: The study was performed at a Korean tertiary referral center between January 2011 and June 2017. In total, 740 patients with IBD who underwent LTBI screening tests and were followed-up for ${\geq}1$ year after TNF inhibitor treatment initiation were enrolled. LTBI was detected on the basis of tuberculin skin test results, interferon-gamma release assay results, chest X-ray findings, and previous tuberculosis treatment history. The patients were classified into LTBI (n = 84) or non-LTBI (n = 656) group. The risk of developing tuberculosis in each group was assessed on the basis of standardized incidence ratio (SIR) and 95% confidence interval (CI) for active tuberculosis. Results: Mean patient age was 33.1 years, and patients with Crohn's disease were predominant (80.7%). Within 1 year after the initiation of TNF inhibitor treatment, 1 patient in the LTBI group (1/84; 1.2%) and 7 patients in the non-LTBI group (7/656; 1.1%) developed active tuberculosis. The overall 1-year incidence of tuberculosis among the patients was significantly higher than that among the general population (SIR, 14.0; 95% CI, 7.0-28.0), and SIR was not affected by LTBI status (LTBI group: 14.5, 95% CI, 2.0-102.6; non-LTBI group: 14.0, 95% CI, 6.7-29.4). Conclusion: Patients with IBD undergoing TNF inhibitor treatment showed a higher 1-year incidence of tuberculosis than the general population irrespective of LTBI status.

• Allergy, Asthma & Immunology Research
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• 제10권6호
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• pp.591-613
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• 2018

Chronic cough is common in the community and causes significant morbidity. Several factors may underlie this problem, but comorbid conditions located at sensory nerve endings that regulate the cough reflex, including rhinitis, rhinosinusitis, asthma, eosinophilic bronchitis, and gastroesophageal reflux disease, are considered important. However, chronic cough is frequently non-specific and accompanied by not easily identifiable causes during the initial evaluation. Therefore, there are unmet needs for developing empirical treatment and practical diagnostic approaches that can be applied in primary clinics. Meanwhile, in referral clinics, a considerable proportion of adult patients with chronic cough are unexplained or refractory to conventional treatment. The present clinical practice guidelines aim to address major clinical questions regarding empirical treatment, practical diagnostic tools for non-specific chronic cough, and available therapeutic options for chronic wet cough in children and unexplained chronic cough in adults in Korea.

• 중환자간호학회지
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• 제14권3호
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• pp.26-36
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• 2021

Purpose : This study aimed to present the incidence of pressure ulcers and identify different associated factors according to the time of occurrence of pressure ulcers in intensive care unit (ICU) patients. Methods : The participants were 313 patients who reported pressure ulcers among 2,908 patients in ICUs at a large tertiary hospital in Gyeonggi-do. Among them, 220 patients (70.3%) had a pressure ulcer before admission, and 93 patients (29.7%) reported newly developed pressure ulcers after admission to the ICU. Data were collected between August 2018 and April 2019. Along with the time of occurrence and characteristics of pressure ulcers, diverse associated factors were gathered through electronic medical records. Data were analyzed using descriptive statistics, independent t-tests, and 𝑥²-tests. Results : Different risk factors associated with pressure ulcers in ICU patients according to the time of occurrence were main diagnosis, score of acute physiology and chronic health evaluation, score of Richmond agitation sedation scale, level of consciousness, administered sedatives, use of a ventilator, insertion of a feeding tube, and the duration of fasting period. Conclusion : Based on the results of this study, healthcare providers, especially ICU nurses, should try to detect early signs and symptoms of pressure ulcers, taking into account the derived factors associated with pressure ulcers in ICU patients. Practical intervention programs and strategies considering the factors associated with pressure ulcers must be developed to prevent and alleviate such ulcers in ICU patients in the future.

• Journal of Clinical Nutrition
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• 제10권2호
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• pp.45-50
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• 2018

Purpose: Intense multidisciplinary team effort is required for the intestinal rehabilitation of patients afflicted with the short bowel syndrome (SBS). These include enteral and parenteral nutrition (PN) support, monitoring of complications related to treatment, and considering further medical or surgical options for intestinal adaptation. Methods: In the Intestinal Rehabilitation Team (IRT) at the Samsung Medical Center, we have experienced 20 cases of adult SBS requiring multidisciplinary intestinal rehabilitation. This study is a retrospective review of the collected medical records. Results: Of the 20 subjects treated, 12 patients were male and 8 patients were female. At the time of referral to the IRT, the mean age was 51.5 years, and the mean body weight was 50.1 kg, which was 90% of the usual body weight. The diseases or operative managements preceding massive bowel resection were malignancy in 11 cases, cardiac surgery in 2 cases, trauma in 2 cases and one case, each of tuberculosis, corrosive esophagitis, atrial fibrillation, simultaneous pancreas and kidney transplantation, and perforated appendicitis. Of these, there were 14 survivals and 6 mortalities. The fatalities were attributed to progression of disease, intestinal failure-associated liver disease, and sepsis (unrelated to intestinal failure) (2 cases each). Among the 14 surviving patients, 8 patients have been weaned off PN, whereas 6 are still dependent on PN (mean PN dependence 36%). Conclusion: This paper reports the results of multidisciplinary intestinal rehabilitation of adult short bowel patients treated at the Samsung Medical Center. Further studies are required to improve survival and enteral tolerance of these patients.

• Parasites, Hosts and Diseases
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• 제57권3호
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• pp.265-271
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• 2019

The prevalence of human taeniasis has decreased in Korea. The stool egg positive proportion decreased from 1.9% in 1971 to 0% in 2004 in nationwide surveys. The neurocysticercosis (NCC) is also presumed to decrease. However, detailed information regarding the recent status of NCC in Korea is lacking. We retrospectively reviewed NCC cases from 1990 to 2016 at Asan Medical Center, a 2700-bed tertiary referral hospital in Korea. We identified patients based on clinical symptoms, brain imaging, pathology and serological assay. The cases were classified as parenchymal, extraparenchymal, and mixed NCC. Eighty-one patients were included in the analysis. The mean age was 54.5 years, and 79.0% were male. The number of NCC cases was highest from 1995 to 1999, and continuously decreased thereafter. Forty (49.4%) patients had parenchymal NCC, while 25 (30.9%) patients had extraparenchymal NCC, and 16 (19.8%) patients had mixed NCC. The seizure and headache were most common symptom of parenchymal NCC and extraparenchymal NCC respectively. Hydrocephalus was more common in extraparenchymal NCC, and patients with extraparenchymal NCC were more likely to require a ventriculoperitoneal shunt. Cases of NCC are decreasing accordingly with human taeniasis and lesion location was the most important determinant of clinical presentation and outcome of NCC in Korea.