철도관광사업 활성화 방안

이경태(Lee Kyeong Tae),도하나(Do Ha Na) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

It is generally discussed rail tour trains in connection with rail tour business. But KORAIL is trying to promote various subsidiary business and tour business together with transport business. Various policies are adopted to make the trains as a object of tourism not just as a means of transportation. In this study we give preliminary plan for revitalizing KORAIL tour business.

자기효능감, 대인관계 기술과 정서표현 불능이 초기 타인지각에 미치는 영향

김혜지 ( Hae Ji Kim ),도하라 ( Ha Ra Do ),박정하 ( Jung Ha Park ),김현주 ( Hyun Ju Kim ),이윤형 ( Yoon Hyoung Lee ) 대구가톨릭대학교 사회과학연구소 2012 사회과학논총 Vol.11 No.-

본 연구의 목적은 대학생들의 자기효능감 대인관계 기술, 정서표현 불능증이 초기 타인인상 형성과 관련이 있는지를 살펴보는 것이다. 이를 위하여 대구가톨릭대학교에 재학 중인 대학생들을 대상으로 본인의 자기효능감, 대인관계 기술, 정서표현 불능 정도를 조사하였으며 실험을 통하여 낯선 사람의 첫인상 형성을 유도하고 이후 그 사람의 첫인상을 평가하도록 하였다. 그 결과 자기효능감이 클수록, 대인관계 기술이 좋을수록 타임을 긍정적으로 평가하는 것으로 나타났다. 반면 강정표현 불능의 정도는 타인 응 호의적으로 보는지와 관련이 있었지만 전반적으로 초기 타인 인상형성과 큰 관련이 없었다. 본 연구의 결과를 통해 초기 타인 지각 시 타인인상 형성에 본인의 비적 특성 이 영향을 미치며 특히 대인관계 기술이 좋고 자기효능감이 높은 사람들이 타인을 보 다 긍정적으로 인식한다는 것을 알 수 있었다. The Purpose of this study was to examine whether self efficacy, Interpersonal relations and Alexithymia of the university students have effect on the early person perception. To do so, self efficacy, interpersonal relations and Alexithymia of the undergraduate students at Catholic University of Daegu were surveyed, Students`` early person perception were examined through a survey after an experiment which induces early person perception. As results, those with higher self efficacy and better interpersonal relations perceived others more positively while Alexithymia does not seem to have a strong relation with person perception. This experiment suggested that not only information from outside but also the individual``s inner treats such as self efficacy and interpersonal relations have effect on the early person perception.

역 매표창구수 결정 모형에 관한 연구

김익희(Kim Ick Hee),이경태(Lee Kyung Tae),도하나(Do Ha Na) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

As the ticket issuing methods have been diversified for the convenience of the passengers such as ticketless service(SMS ticket, e-ticket, home ticket), automatic ticket issuing machine and consignment ticket sale, maintaining the current number of ticket booth has been becoming a issue. Too many booth can cause the inefficiency of the cost of labor. According to the Charter of Customer Service of Korail, on the other hand, 95% of passengers have to purchase a train ticket within 5 minutes. This study was designed to present a decision making model for the optimum number of ticket booth which can affect an efficient operation of train station and improvement of customer convenience. And, this paper shows the proper manpower of ticket booth and the change of customer waiting time by analyzing the arrival and ticket issuing time of passengers based on "Queueing Theory". However, it is insufficient to be generalized due to some limitations of analysis. This study will contribute to improve customer satisfaction by reducing the waiting time at the ticket booth. In addition, presenting the optimum number of booth is expected to have an effect on the increase of productivity and cost savings.

경정맥을 통한 간생검의 유용성과 안전성

김도하(Do Ha Kim),김홍자(Hong Ja Kim),박능화(Neung Hwa Park),이근찬(Geun Chan Lee),정영화(Young Wha Chung),이영상(Young Sang Lee),구동억(Dong Erk Goo),윤현기(Hyeon Ki Yoon),성규보(Kyu Bo Sung),유은실(Eun Sil Yu),서동진(Dong Jin Suh) 대한내과학회 1998 대한내과학회지 Vol.54 No.2

N/A Objectives : Liver biopsy is an essential tool to confirm suspected diagnosis and to guide specific therapy in patients with liver disease. But, the standard percutaneous needle biopsy is contraindicated in patients with coagulopathy and large amount of ascites. The transjugular approach has been developed for these problem cases, but its efficacy and safety has not been adequately tested in Korea. Methods : We retrospectively analysed 21 transjugular liver biopsy cases, and the success rate of procedure, the adequacy of obtained specimen for diagnosis and procedure related complications were reviewed. Results : The major reasons for trasjugular liver biopsy were coagulopathy(71%) and massive ascites(19%). Liver tissue was obtained successfully in 20 of 21 cases. The mean number of specimens was 3.4±1.1 per case and the mean size of specimen was 1.8±0.7mm Pathologists reviewed and judged as adequate for diagnosis in 13 cases(65%), helpful in 6 cases(30%), and inadequate in 1 case. Minor complications such as neck pain, hematoma at puncture site, or transient fever occurred in 5 cases (23.8%) but there was no major complication or procedure-related mortality. Conclusion: Transjugular liver biopsy is a safe and valuable technique that provides adequate diagnostic informations in about two thirds of patients for whom conventional percutaneous biopsy is contraindicated.

위내 담즙산의 농도와 위점막의 장상피화생과의 연관성

김도하(Do Ha Kim),박능화(Neung Wha Park),주광로(Kwang Ro Joo),이선호(Seon Ho Lee),김성률(Sung Ryul Kim),유철인(Cheol In Yoo),서재희(Jae Hee Suh),박재후(Jae Hoo Park) 대한소화기학회 2002 대한소화기학회지 Vol.39 No.4

Background/Aims: Enterogastric reflux of bile has been suspected as a risk factor of foregut cancer. Thus, we measured total intragastric bile acid to determine association between duodenogastric reflux and development of intestinal metaplasia known as premalignant gastric mucosal change. Methods: One hundred and three patients with a functional dyspepsia underwent endoscopy. Subsequently, samples of fasting gastric juice were taken from all patients for analysis of total bile acid. With the specimens from 5 sites of the antrum and body, the degree of intestinal metaplasia was evaluated by the update Sydney System and H. pylori infection was evaluated also by Warthin-Starry staining. Results: There was a significant correlation between the total bile acid level and the degree of intestinal metaplasia (r=0.278, p=0.005). Moreover, multiple linear regression test showed that the concentration of total bile acid was one of the independent risk factors for intestinal metaplasia regardless of age and H. pylori infection. Conclusions: These results suggest that intragastric bile acid may affect histologic premalignant changes of the gastric mucosa and thus, duodenogastric reflux may play a role in gastric carcinogenesis. (Korean J Gastroenterol 2002;39:248-253)

곡선형 태양광발전시스템의 설치 유형에 따른 발전량 및 음영 분석

이도하(Do-Ha Lee),이길송(Gil-Song Lee),신주영(Ju-Young Shin),이진섭(Jin-Sub Lee) 한국태양에너지학회 2022 한국태양에너지학회 학술대회논문집 Vol.2022 No.10

인공정화에 의한 참굴(Crassostrea gigas)의 유통기한 연장

이도하 ( Do-ha Lee ),강동민 ( Dong-min Kang ),박슬기 ( Seul-ki Park ),정민철 ( Min-chul Jeong ),강민균 ( Min-gyun Kang ),조두민 ( Du-min Jo ),이재화 ( Jae-hwa Lee ),이다은 ( Da-eun Lee ),심윤아 ( Yoon-ah Sim ),정금재 ( Geum-jae Je 한국수산과학회(구 한국수산학회) 2020 한국수산과학회지 Vol.53 No.6

The objective of this study was to evaluate the effect of the depuration process (artificial seawater sterilization using UV light) for extending the shelf life of raw oyster Crassostrea gigas and maintaining food quality. To confirm the effects of depuration, microbiological (viable cell count) and several physiochemical analyses (pH and glycogen levels in shucked oyster and pH, soluble protein, and turbidity in filling water) were carried out during the storage of raw oysters. The results showed that depuration could effectively extend the shelf life (2-3 days) of raw oysters with minimal change in food quality, including pH and glycogen content. Thus, the depuration process proposed in this study could successfully be applied to processing practices for other shellfish to extend their shelf life and contribute to the management of seafood safety issues.

급성 골수성 백혈병에서 고용량 Cytarabine 을 이용한 공고요법

김도하(Do Ha Kim),이규형(Kyoo Hyung Lee),조재근(Jae Kun Cho),김선희(Seon Hee Kim),이제환(Je Hwan Lee),김성배(Sung Bae Kim),김상위(Sang We Kim),서철원(Chul Won Suh),이정신(Jung Shin Lee),김우건(Woo Kun Kim),김상희(Sang Hee Kim) 대한내과학회 1996 대한내과학회지 Vol.51 No.4

N/A Objectives: This study was designed to evaluate the therapeutic efficacy of postremission therapy utilizing high-dose cytarabine in patients with newly diagnosed acute myelogenous leukemia and to assess the toxicities of the therapy. Acute promyelocytic leukemia (FAB M3) is excluded because it has very unique clinicopathologic characteristics. Methods: Those patients who achieved complete remission had first consolidation therapy with conventional dose cytarabine and daunorubicin but second and third consolidation was done with high-dose cytarabine (cytarabine 1gm/㎡ i.v. over 1 hour every 12 hours daily for 5 days) and daunorubicin. Overall survival and disease free survival were compared with previous conventional dose cytarabine and daunorubicin postremission therapy. Results: 1) Complete remission occurred in 62% (28 of 45 patients) and control group 48% (14 of 29 patients) (p=0.15). 2) The median survival of all 45 patients was not different significantly compared with control group (10 months vs 7 months, p=0.08). 3) The median disease free survival of 21 complete responders receiving at least one course of consolidation was 10 months and there was no significant difference compared with control group 7 months (p=0.47). 4) The toxicity including treatment-related motility, neutropenia duration was similar in both groups. Conclusion: Although our high-dose cytarabine consolidation therapy regimen appeared to have acceptable toxicity, its results did not show the superiority to previous conventional dose cytarabine consolidation regimen.

컬러 BIPV 모듈 제작을 위한 컬러 유리의 광학적 특성 분석

신주영(Ju-Young Shin),이도하(Do-Ha Lee),이진섭(Jin-Sub Lee),박지홍(Chi-Hong Park) 한국태양에너지학회 2022 한국태양에너지학회 학술대회논문집 Vol.2022 No.4

혈액투석 중 채취한 검체를 이용한 Equilibrated Kt/V 를 예측하는 방법

이종수(Jong Soo Lee),김도하(Do Ha Kim),최승원(Seung Won Choi),김영일(Young Il Kim),박재후(Jae Hoo Park),박수길(Su Kil Park),이상구(Sang Koo Lee),이선호(Seon Ho Lee),김성률(Sung Ryul Kim),박정식(Jung Sik Park) 대한신장학회 2002 Kidney Research and Clinical Practice Vol.21 No.1

목 적 : 단일 구획 요소 역동학 모형에서 투석 직후 혈중 요소질소 농도의 반등(postdialysis urea ebound, PDUR)은 실제 Kt/ V를 과대 평가하게 된다. 본 연구는 투석 후 평형상태의 혈중 요소질소 농도를 가장 잘 반영하는 투석 중의 혈액 검체 채취 시점을 확인하고, 이 검체를 이용하여 계산된 Kt/ V가 요소질소 농도 반등 완료 후의 Kt/V와 일치하는 정도를 알아보고자 하였다. 방 법 : 유지혈액 투석을 받고 있는 21명의 말기 신부전증 환자에서 투석 전, 투석시작 후 80분, 120분, 190분, 200분, 210분, 220분, 투석종료 시점, 투석종료 45분 후 혈액을 채취하여 각각 BUN을 측정하였다. 저자들은 투석종료 45분 후 요소질소 농도 반등이 완료된 시점의 검체를 이용한 Kt/V(eKt/V PDUR)를 참고치로 하여 Smye method, double- pool Daugirdas 공식, Tattersall 공식, 투석 중에 채취한 검체 중 하나를 이용하여 계산한 Kt/V를 각각 비교하였다. 결 과 : 투석 후 평균 요소질소 농도의 반등은 17.2±6%였고 single poool (sp)Kt/ V와 eKt/V는 각각 1.300±0.24, 1.120±0.20으로 spKt/ V는 eKt/ V PDUR를 13.5±4% 과대평가 하였다. 투석 중에 채취한 검체 중 투석종료 40분 전에 채취한 검체가(27.9±9 ㎎/dL) 요소농도 반등후의 평형상태의 혈중요소 질소 농도(28.0±9 ㎎/dL)를 가장 잘 반영하였다. Double- pool Daugirdas 공식의 Kt/V(eKt/V Dau =1.135±0.21, r =0.972, p<0.001), Tattersall 공식의 Kt/V(eKt/ V T at =1.134±0.22, r =0.972, p<0.001), Smye공식의 Kt/ V(eKt/ V Smye=1.156±0.24, r =0.900, p<0.001)는 PDUR eKt/V과 유의한 상관관계를 보였으며, 투석종료 40분 전에 채취한 검체를 이용하여 계산한 Kt/ V(eKt/V T-40 min =1.120±0.20, r =0.984, p<0.001)가 가장 유의한 상관관계를 나타내는 경향을 보였다. Bland- Altman분석에서 Kt/V T - 40 min는 eKt/ V PDUR과 가장 좋은 일치 정도를 보였다. 결 론 : 일반 투석기를 이용한 4시간 동안의 혈액투석에 있어서 spKt/V는 실제 전달된 Kt/V를 평가하는데 부적절하며, 투석종료 40분 전에 채취한 검체를 이용하여 계산한 Kt/V는 요소질소 농도 반등 후의 평형상태의 Kt/ V를 예측하는데 있어서 임상적으로 간단하게 이용할 수 있는 좋은 방법으로 생각된다. Purpose : Postdialysis urea rebound(PDUR) causes the overestimation of actual amount of delivered dialysis in Kt/V from single pool urea kinetic. To correct PDUR and predict equilibrated Kt/V (eKt/V) some methods have suggested by Daugirdas, et al. Smye, et al. and Tattersall, et al. The purposes of this study were to determine the optimum intradialytic urea sample time that fits best with PDUR and to compare calculated Kt/V by this sample with the different other methods. Methods : The subjects were 21 patients who were dialyzed at three times 4 hours weekly, using bicarbonate and cellulosynthetic membranes. Blood samples to measure BUN were obtained at initiation of dialysis session and then at 80, 120, 180, 200, 210, 220 minutes, and the end of dialysis session times and then at 45 minutes of postdialysis . We compared four different methods of eKt/V with the equilibrated 45-minute PDUR Kt/V (eKt/V PDUR) as the reference method. Results : The mean PDUR was 17.2± 6%. spKt/V and eKt/V PDUR was 1.300±0.24 and 1.120±0.20 respectively, leading to overestimation of actual delivered Kt/V by 13.5±5%. The best time for intradialytic sampling to fit with PDUR BUN w as 40 minute before the end of session. eKt/V by Daugirdas formulae(eKt/V Dau=1.315± 0.21, r=0.972, p<0.001), Tattersal formulae(eKt/V T at=1.134± 0.22, r =0.972, p<0.972, p<0.001) and Smye formulae(eKt/V Smye=1.156± 0.24, r=0.900, p<0.001) showed good correlation with eKt/V PDUR. eKt/V calculated by the sample of 40 minute before end of session (eKt/V T-40=1.120±0.20, r=0.984) had tendency of the best correlation with eKt/V PDUR. Among these different methods, eKt/V T -40 had the best degree of agreement with eKt/V PDUR by Bland-Altman analysis. Conclusion : Our results suggest that the use of spKt/V is not adequate to estimate the amount of delivered hemodialysis dose because of the existence of significant postdialysis urea rebound even conventional 4 hour dialysis. Intradialytic sampling method is a simple and accurate method to predict eKt/V for use in clinical practice.