슬로시티 관광자원화 사업에 대한 지역주민의 태도 - 슬로시티 청산도를 중심으로 -

정성문,양창환,강신겸 한국관광학회 2016 관광학연구 Vol.40 No.7

This study aims to examine the attitudes of the Chungsando Island’s residents toward the business of tourism resources. The ‘Economic impact’, the ‘environmental impact’ factor and the ‘Slow City movement practice’ factor show statistical significance with the result that the factors analyzed affected the level of satisfaction throughout the tourism resource industry. Residents expect the economic impact to show the dissatisfaction with ongoing tourism resource business. Therefore, a variety of policies are required to give direct benefits to the real income of residents. The reason why the environmental factors are analyzed significantly is that positive effects are expected from the tourism resource industry despite environmental problems. Furthermore, residents who do not implement the Slow City movement are not satisfied with the tourism resource industry. It is interpreted that the residents show passive attitudes toward the movement practice. They have complaints concerning the direct benefits from this movement even though they are sympathetic to the ideology. In order to overcome this problem, damage to the landscape should be avoided and we should focus on the development of added tourism revenue. In addition, we have to create a policy focusing on a Resource business that preserves the original Slow City purposes. Then, we must re-ignite a movement ‘of residents, for the residents, by the residents’. 본 연구는 아시아 최초 슬로시티이자 섬 관광지로 각광을 받고 있는 전라남도 청산도의 관광자원화 사업에 대한 주민들의 태도를 분석하는 것을 목적으로 하고 있다. 연구대상지인 청산도의 주민들을 대상으로 관광자원화 사업에 대한 만족도에 영향을 미치는 요인들을 분석한 결과 ‘경제적 영향’, ‘환경적 영향’ 요인과 ‘슬로시티 운동 실천’ 항목이 유의한 것으로 나타났다. 경제적 영향을 기대하는 주민들은 현재 진행되고 있는 관광자원화 사업에 불만족을 나타내고 있어 주민들의 실질소득에 직접적인 혜택이 미칠 수 있는 정책마련이 요구된다. 또 환경적 영향 요인이 유의하게 분석된 것은 환경 문제가 발생해도 관광자원화 사업을 통해 예상되는 긍정적 효과가 크기 때문에 이를 참고 견딜 수 있다는 것으로 해석된다. 이와 함께 슬로시티 운동을 실천 하지 않고 있다고 평가하는 주민들이 관광자원화 사업에 불만족을 나타내고 있다. 이는 슬로시티 운동의 동력이자 주체여야 할 주민들이 이념은 공감하지만 앞서 언급한 것처럼 직접적인 혜택에 대한 불만이 형성되면서 실천에는 소극적인 태도를 보이고 있는 것으로 해석된다. 이를 극복하기 위해서는 경관 훼손과 관광 부가가치에 치중하는 개발을 지양하고 슬로시티 본연의 목적을 살리는 방향으로 정책을 계획해 ‘주민의, 주민에 의한, 주민을 위한’ 운동을 재 점화시켜야 한다.

Postreperfusion syndrome during liver transplantation

정성문 대한마취통증의학회 2015 Korean Journal of Anesthesiology Vol.68 No.6

As surgical and graft preservation techniques have improved and immunosuppressive drugs have advanced, liver transplantation (LT) is now considered the gold standard for treating patients with end-stage liver disease worldwide. However, despite the improved survival following LT, severe hemodynamic disturbances during LT remain a serious issue for the anesthesiologist. The greatest hemodynamic disturbance is postreperfusion syndrome (PRS), which occurs at reperfusion of the donated liver after unclamping of the portal vein. PRS is characterized by marked decreases in mean arterial pressure and systemic vascular resistance, and moderate increases in pulmonary arterial pressure and central venous pressure. The underlying pathophysiological mechanisms of PRS are complex. Moreover, risk factors associated with PRS are not fully understood. Rapid and appropriate treatment with vasopressors, volume replacement, or venesection must be provided depending on the cause of the hemodynamic disturbance when hemodynamic instability becomes profound after reperfusion. The negative effects of PRS on postoperative early morbidity and mortality are clear, but the effect of PRS on postoperative long-term mortality remains a matter of debate.

허혈 및 저산소 전조건화가 신생 백서의 저산소-허혈 뇌손상에 미치는 보호 효과: 수소 자기 공명 분광법을 이용한 연구

정성문,정화성,최재문,방지연,임근호,박평환 대한마취통증의학회 2006 Korean Journal of Anesthesiology Vol.50 No.2

Background: A brief episode of cerebral ischemia confers transient ischemic tolerance to a subsequent ischemic challenge. We examined the effect of ischemic and hypoxic preconditioning in the neonatal rat. Methods: Seven-day old Sprague-Dawley rat pups were divided into three groups:control (n = 53), ischemic preconditioning (n = 51), and hypoxic preconditioning (n = 48). For ischemic preconditioning, the right common carotid artery was occluded for 10 min. Rats in the hypoxic preconditioning group were kept under hypoxic (8% oxygen/92% nitrogen) conditions for 4h. Twenty-four hours after the preconditioning, rats from all groups were exposed to the right common carotid artery ligature, followed by 2.5 h of hypoxia. Lipid/N-acetyl aspartate (Lip/NAA) and lipid/creatine (Lip/Cr) ratios from 1H MR spectroscopy and terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end-labeling (TUNEL) were evaluated as measures of apoptosis 1 and 7 days after hypoxic-ischemic injury. Results: In the ischemic and hypoxic preconditioning groups, the Lip/NAA and Lip/Cr ratios and the numbers of TUNEL- positive cells were significantly lower than those in the control group (P < 0.05), but there were no significant differences between the two preconditioning groups. Conclusions: These results suggest that ischemic and hypoxic preconditioning in the neonatal rat attenuate the apoptosis that is caused by hypoxic-ischemic brain injury. (Korean J Anesthesiol 2006; 50: 188~97)

Effect of Total Collimation Width on Relative Electron Density, Effective Atomic Number, and Stopping Power Ratio Acquired by Dual-Layer Dual-Energy Computed Tomography

정성문,김빛별,윤은택,김정인,박종민,최창헌 한국의학물리학회 2021 의학물리 Vol.32 No.4

Purpose: This study aimed to evaluate the effect of collimator width on effective atomic number (EAN), relative electron density (RED), and stopping power ratio (SPR) measured by dual-layer dual-energy computed tomography (DL-DECT). Methods: CIRS electron density calibration phantoms with two different arrangements of material plugs were scanned by DL-DECT with two different collimator widths. The first phantom included two dense bone plugs, while the second excluded dense bone plugs. The collimator widths selected were 64 mm×0.625 mm for wider collimators and 16 mm×0.625 mm for narrow collimators. The scanning parameters were 120 kVp, 0.33 second gantry rotation, 3 mm slice thickness, B reconstruction filter, and spectral level 4. An image analysis portal system provided by a computed tomography (CT) manufacturer was used to derive the EAN and RED of the phantoms from the combination of low energy and high energy CT images. The EAN and RED were compared between the images scanned using the two different collimation widths. Results: The CT images with the wider collimation width generated more severe artifacts, particularly with high-density material (i.e., dense bone). RED and EAN for tissues (excluding lung and bones) with the wider collimation width showed significant relative differences compared to the theoretical value (4.5% for RED and 20.6% for EAN), while those with the narrow collimation width were closer to the theoretical value of each material (2.2% for EAN and 2.3% for RED). Scanning with narrow collimation width increased the accuracy of SPR estimation even with high- density bone plugs in the phantom. Conclusions: The effect of CT collimation width on EAN, RED, and SPR measured by DL-DECT was evaluated. In order to improve the accuracy of the measured EAN, RED, and SPR by DL-DECT, CT scanning should be performed using narrow collimation widths.

Dosimetric Characteristics of Flexible Radiochromic Film Based on LiPCDA

정성문,조진동,김정인,박종민,최창헌 한국의학물리학회 2021 의학물리 Vol.32 No.4

This study aimed to determine the optimal thickness of the active layer and scan mode for a flexible radiochromic film (F-RCF) based on the active lithium salt of pentacosa-10,12-diynoic acid (LiPCDA). F-RCFs of 90, 120, 140, and 170-µm thickness were fabricated using LiPCDA. Several pieces of the F-RCFs were exposed to doses ranging from 0 to 3 Gy. Transmission and reflection modes were used to scan the irradiated F-RCFs. Their dose-response curves were obtained using a second-order polynomial equation. Their sensitivity was evaluated for both scanning modes, and the uniformity of the batch was also examined. For both the transmission and reflection modes, the sensitivity increased as the film thickness increased. For the reflection mode, the dose response increased dramatically under 1 Gy. The value of the net optical density varied rapidly as the thickness of the film increased. However, the dose-response curves showed a supralinear-curve relationship at doses greater than 2 Gy. The sensitivity of the reflection scan at doses greater than 2 Gy was higher than that of the reflection scan within 0–2 Gy. The sensitivity steadily decreased with increasing doses, and the sensitivity of the two modes was within 0.1 to 0.2 at 2 Gy and was saturated beyond that. For the transmission scan, the sensitivity was approximately 0.2 at 3 Gy. For the intra-batch test result, the maximum net optical density difference of the intra-batch was 5.5% at 2 Gy and 7.4% at 0.2 Gy in the transmission and reflection scans, respectively. In the low-dose range, film thickness of more than 120-µm was proper in the transmission mode. In contrast, the transmission mode showed a better result compared to the reflection mode. Therefore, the proper scan mode should be selected according to the dose range.

고층사무소 건축계획을 위한 건물평가에 관한 연구 : 한국종합무역회관과 글라스타워를 중심으로 With Focused on the Korea World Trade Center and Glass Tower

정성문,이강주 대한건축학회 2003 대한건축학회논문집 Vol.19 No.8

This study focuses on the building evaluation for the architectural planning of highrise office building through the analysis of workers satisfaction. In order to do this, we have made an investigation into the following elements. First, the selected buildings are investigated into the actual extraction of design considerations. Second, a prototype of workers satisfaction model is established to measure and determine the workers' satisfaction level of the selected buildings. And third, design improvement factors based on the analysis of workers satisfaction are established. The design considerations are extracted from the workers' satisfaction level with employing statistical analysis as well as developing systematic methods of the investigation.

Comparison between Old and New Versions of Electron Monte Carlo (eMC) Dose Calculation

정성문,손재만,진형민,강성희,박종민,김정인,최창헌 한국의학물리학회 2023 의학물리 Vol.34 No.2

This study compared the dose calculated using the electron Monte Carlo (eMC) dose calculation algorithm employing the old version (eMC V13.7) of the Varian Eclipse treatment-planning system (TPS) and its newer version (eMC V16.1). The eMC V16.1 was configured using the same beam data as the eMC V13.7. Beam data measured using the VitalBeam linear accelerator were implemented. A box-shaped water phantom (30×30×30 cm3) was generated in the TPS. Consequently, the TPS with eMC V13.7 and eMC V16.1 calculated the dose to the water phantom delivered by electron beams of various energies with a field size of 10×10 cm2 . The calculations were repeated while changing the dose-smoothing levels and normalization method. Subsequently, the percentage depth dose and lateral profile of the dose distributions acquired by eMC V13.7 and eMC V16.1 were analyzed. In addition, the dose-volume histogram (DVH) differences between the two versions for the heterogeneous phantom with bone and lung inserted were compared. The doses calculated using eMC V16.1 were similar to those calculated using eMC V13.7 for the homogenous phantoms. However, a DVH difference was observed in the heterogeneous phantom, particularly in the bone material. The dose distribution calculated using eMC V16.1 was comparable to that of eMC V13.7 in the case of homogenous phantoms. The version changes resulted in a different DVH for the heterogeneous phantoms. However, further investigations to assess the DVH differences in patients and experimental validations for eMC V16.1, particularly for heterogeneous geometry, are required.

미세침습 로봇 보조 심장수술에서 상대정맥 캐뉼라와 폐동맥 카테터 거치중 발생한 폐동맥 카테터 유도자의 꺾임

정성문,이환희,정용보,최인철 대한마취통증의학회 2005 Korean Journal of Anesthesiology Vol.48 No.2

A 45 year-old-women with tracheal stenosis due to an endotracheal tumor was scheduled for tracheal reconstruction surgery. The stenotic lesion was located 1 cm above the carina, and was length of 4 cm and had a narrowest internal diameter of 0.4 cm. The length of such a stenotic segment and its narrowest internal diameter may pose lung ventilation problems before or during tumor resection, which may preclude a successful outcome. Thus, during tracheal reconstruction surgery a femoro-femoral partial cardiopulmonary bypass, self respiration, and pulmonary artery ligation were used. These measures improved oxygenation and cardiovascular stability, and tracheal reconstruction was successfully performed without complication. A 45 year-old-women with tracheal stenosis due to an endotracheal tumor was scheduled for tracheal reconstruction surgery. The stenotic lesion was located 1 cm above the carina, and was length of 4 cm and had a narrowest internal diameter of 0.4 cm. The length of such a stenotic segment and its narrowest internal diameter may pose lung ventilation problems before or during tumor resection, which may preclude a successful outcome. Thus, during tracheal reconstruction surgery a femoro-femoral partial cardiopulmonary bypass, self respiration, and pulmonary artery ligation were used. These measures improved oxygenation and cardiovascular stability, and tracheal reconstruction was successfully performed without complication.

공급망의 생산능력을 최적화하는 공급계약 : 교섭력을 기준으로

정성문,고시근,구평회 대한산업공학회 2021 대한산업공학회 추계학술대회논문집 Vol.2021 No.11

공정혁신과 제품혁신이 고용구조와 경제성장에 미치는 영향

정성문,곽기현,여영준 한국혁신학회 2017 한국혁신학회지 Vol.12 No.2

Recently, the emergence of artificial intelligence and robot have reignited the debate on the relationship between innovation and employment. However, the issue between innovation and employment, which has recently been raised, is focused only on process innovation. While the labor-saving innovation such as process innovation is one aspect of the innovation, but labor-friendly innovation such as product innovation is another aspect of the innovation. Therefore, the impact of innovation on employment and growth should be viewed as direct effects as well as indirect effects. In this paper, we tried to examine how the two aspects of innovation - process innovation and product innovation - affect the employment structure and economic growth by using the knowledge-based CGE (Computable General Equilibrium) model. The results of the study are summarized as follows. First, considering the characteristics of process innovation only, additional input of knowledge capital occurs that skill-biased technological and capital-biased technology change. However, if both the characteristics of process innovation and product innovation are reflected, the input of additional knowledge capital has a positive effect on employment growth and economic growth. However, economic growth through innovation still results in skill-biased technological change and capital-biased technological change, resulting in increased polarization. Therefore, it is necessary to overcome these problems for sustainable growth. 최근 들어 인공지능과 로봇의 등장으로 인해 혁신과 고용 사이의 상관관계에 대한 논쟁이 다시 치열해지고 있다. 하지만 최근에 제기되고 있는 혁신과 고용간의 문제는 공정혁신 측면에만 치중되어 있다. 혁신은 공정혁신과 같은 노동 절약적 혁신도 있지만, 제품혁신과 같은 노동 친화적 혁신도 존재한다. 따라서 혁신이 고용과 성장에 미치는 영향은 직접적인 효과와 더불어 간접적인 효과도 같이 살펴보아야 한다. 따라서 본 연구에서는 지식기반 연산일반균형모형을 이용하여 혁신의 두 가지 측면인 공정혁신과 제품혁신이 고용구조와 경제성장에 어떠한 영향을 미치는지 살펴보고자 하였다. 연구의 결과를 정리해보면 다음과 같다. 우선 공정혁신의 특성만을 고려할 경우 추가적인 지식자본의 투입은 숙련편향적 기술변화와 자본편향적 기술변화를 발생시키는 것으로 나타났다. 그러나 공정혁신의 특성과 제품혁신의 특성을 모두 반영해준 경우 추가적인 지식자본의 투입은 고용이 증가하고 경제성장에 긍정적인 영향을 주는 것으로 나타났다. 하지만 혁신을 통한 경제성장은 여전히 숙련편향적 기술변화와 자본편향적 기술변화을 일으키고, 이로 인해 양극화가 심화되는 것으로 나타났다. 따라서 지속가능한 성장을 위해서는 이러한 문제점들을 보완할 필요가 있다.