• 펄프종이기술
• /
• 제44권6호
• /
• pp.70-78
• /
• 2012

The Annals of Joseon Dynasty, which recorded governmental affairs for 472 years (AD 1392-1863) during the Joseon dynasty is an representative paper cultural heritage in Korea. Being recognised their authenticity and values they were designated as the No 151 national treasure of Korea in 1973 and registered as 'The Memories of the World' by UNESCO in 1997. Unusually, some volumes of the Annals were treated by beeswax for the permanent preservation. However, the examinations on the deterioration of the beeswax-treated volumes had been exposed the serious damage than the untreated volumes. In particular, the larger amount of beeswax were worst in deterioration condition. In order to solve these problems, NRICH(National Research Institute of Cultural Heritage) of Korea launched the investigation study for the conservation of beeswax-treated volumes of the Annals. Now then, the five study areas have been set up; 1) to understand the damaged condition of the Annals; 2) to analyse the raw materials and production techniques; 3) to test the degradation degree using the duplication samples for understanding the aging factors and mechanism; 4) to develop the conservation techniques through dewaxing and thereafter strengthening the base paper of Hanji; 5) to develop the long-term storage technique using inert gases. On the basis of outcomes from this study, NRICH will plan to establish the systematic conservation and management plan for the beeswax-treated volumes of the Annals in future.

• 한국ITS학회 논문지
• /
• 제15권3호
• /
• pp.12-22
• /
• 2016

보행은 일상생활에서 행해지는 가장 기본적인 이동수단으로 보행에 대한 관심과 이를 활성화시키고자 하는 노력이 지속적으로 증가하고 있다. 이에 본 연구에서는 구조방정식을 이용하여 보행량에 영향을 미치는 여러 요인들 간의 관계를 규명하고자 하였다. 본 연구에서는 하루 전체시간, 비첨두시간, 첨두시간으로 분류하여 시간대 별로 요인들이 보행량에 미치는 영향의 변화를 비교 분석하였다. 분석결과 상업 업무요인, 접근성요인, 보행환경요인이 보행량을 증가시키는 요인으로 작용하는 것으로 나타난 반면, 주거요인은 보행량을 증가시키는데 기여하지 못한다는 결과를 도출하였다. 또한 비첨두시간에는 하루 전체시간보다 상업 업무요인의 가중치가 증가한 반면 주거요인, 접근성요인, 보행환경요인의 가중치는 상대적으로 감소하였다. 첨두시간의 경우 비첨두시간과는 달리 하루 전체시간보다 상업 업무요인의 가중치가 감소하였으며 나머지 세 요인의 가중치는 증가한 것으로 나타났다.

• 한국도서관정보학회지
• /
• 제43권4호
• /
• pp.271-295
• /
• 2012

이 연구는 보성선원의 대웅전에 봉안되어 있는 석가불 문수상 보현상 등 삼존불에서 수습된 복장전적에 대해 서지학적 측면에서 분석한 글이다. 보성선원의 대웅전에 봉안되어 있는 삼존불은 1647년 이전에 경상도 거창의 견암사(見巖寺)에서 조성되어 현재의 보성선원으로 이관된 불상이다. 삼존불 중 석가불에서 37책이, 문수상과 보현상에서는 각각 18책이 수습되어 전체 13종 73책에 달하는 복장전적이 수습되었던 것으로 조사되었다. 이 중에는 새로운 3종(화엄경, 금강경, 천태사교의집해)의 불교전적은 처음으로 나타난 것으로 파악되었다. 그리고 보성선원의 복장본의 특성을 분석한 결과, 전체 13종 73책 중 경전류가 6종 65책으로 대부분을 차지하고 있다는 사실이 밝혀졌다. 특히 이 중에는 조선시대에 우리나라에서 독자적으로 간행된 5계통의 법화경 46책이 포함되어 있다. 이들 판본은 불상이 조성된 이전에 주로 경상도와 전라도 지역에서 개판된 사실을 분석하였다.

• Journal of Chest Surgery
• /
• 제49권sup1호
• /
• pp.60-67
• /
• 2016

Background: Coronary angioplasty has been replacing coronary artery bypass grafting (CABG) because of the relative advantage in terms of recovery time and noninvasiveness of the procedure. Compared to other Organization for Economic Cooperation and Development (OECD) countries, Korea has experienced a rapid increase in coronary angioplasty volumes. Methods: We analyzed changes in procedure volumes of CABG and of percutaneous coronary intervention (PCI) from three sources: the OECD Health Data, the National Health Insurance Service (NHIS) surgery statistics, and the National Health Insurance claims data. Results: We found the ratio of procedure volume of PCI to that of CABG per 100,000 population was 19.12 in 2014, which was more than triple the OECD average of 5.92 for the same year. According to data from NHIS statistics, this ratio was an increase from 11.4 to 19.3 between 2006 and 2013. Conclusion: We found that Korea has a higher ratio of total procedure volumes of PCI with respect to CABG and also a more rapid increase of volumes of PCI than other countries. Prospective studies are required to determine whether this increase in absolute volumes of PCI is a natural response to a real medical need or representative of medical overuse.

• The Korean Journal of Pain
• /
• 제14권1호
• /
• pp.26-31
• /
• 2001

Background: Sympathetic blocks with local anesthetics are used to differentiate sympathetically- maintained pain (SMP) from sympathetically-independent pain (SIP). However, systemic lidocaine is also used in the management of neuropathic pain. Therefore, there may be possibility of a false positive response in relieving their pain by systemic absorption of lidocaine following a diagnostic sympathetic block in patients with SIP. In this study, we measured the plasma lidocaine concentrations after a stellate ganglion block (SGB) using three volumes of 1% lidocaine. Methods: This prospective, crossover study was performed in 3 patients who experience sudden hearing loss and in 4 volunteers. Each person received SGB three times using three different volumes (6 ml, 12 ml and 16 ml) of 1% lidocaine at one week intervals. SGB was performed using a 23 G butterfly needle via a paratracheal approach by two persons. Two ml of venous blood was obtained from a prepared contra-lateral sided venous route at 1, 3, 5, 7, 10, 20 and 60 min after SGB. Plasma lidocaine level was analyzed by immunoassay. Results: Mean plasma lidocaine concentrations correlated well with the volumes of 1% lidocaine used in SGB; larger volumes showed higher concentrations (P < 0.01). Mean peak plasma concentrations were $1.08{\pm}0.18$ in 6 ml, $1.90{\pm}0.47$ in the 12 ml and $2.74{\pm}0.67{\mu}g/ml$ in the 16 ml groups (P < 0.01). The mean time to reach peak plasma concentration was not significantly different between the three groups. Conclusions: The peak plasma lidocaine concentrations in SGB using large volume were found to be similar to that of IV lidocaine infusion in the management of neuropathic pain. These data suggest that diagnostic sympathetic block may result in many false positive responses for SMP. Part of its effect may be related to systemic local anesthetic absorption and not to a sympathetic block. Therefore, physicians may be required to use optimal volumes and minimal concentration of local anesthetic in diagnostic sympathetic block procedures and also make a careful assessment of the performance of a permanent sympathetic block.

• 한국ITS학회 논문지
• /
• 제14권2호
• /
• pp.39-53
• /
• 2015

본 연구는 서울시 유동인구조사자료를 활용하여 토지이용유형별로 보행량에 영향을 미치는 요인을 비교분석하였다. 우선, 조사지점 주변의 주거, 상업, 공업, 녹지 등의 토지이용을 바탕으로 K-평균 군집분석을 통해 5개의 군집으로 분류하고, 군집별 1일 및 시간대별 평균보행량의 차이를 비교하였다. 이어서, 군집별로 보행량에 영향을 미치는 요인을 3가지 공간적 위계의 설명변수로 구분하여 다중선형회귀분석을 통해 영향 요인을 규명하고 군집별로 차이점을 비교하였다. 분석결과, 보도 너비는 모든 군집에서 보행량의 증가요인으로 분석되었으나, 다른 변수들의 경우 군집별로 설명변수가 상이하고, 공간위계별로 영향력도 다른 것으로 나타났다. 본 연구의 결과는 향후 토지이용유형별 가로관련 정책을 수립하는 기초자료로 활용할 수 있을 것으로 판단된다.

• 한국도로학회논문집
• /
• 제17권1호
• /
• pp.35-41
• /
• 2015

PURPOSES : The purpose of this study is to analyze the service life of expressway pavement based on both traffic volumes and use of deicing chemicals. METHODS : A database was built using expressway rehabilitation history information from over the last decade. In order to estimate the service life of expressway pavement, various analysis methods were considered, and a decision was made to perform analysis using a method based on an accumulated rehabilitation ratio. The service life of expressway pavement was then analyzed by classifying the scale of traffic volume and extent of de-icing chemicals used. RESULTS : The service life of PMA and SMA ranged from 7.8 to 10.6 years and from 9.9 to 12.0 years, respectively. The service life of JCP ranged from 16.0 to 22.2 years, and the service life of CRCP was 33.5 years on average. Results of assessing service life according to traffic volumes and de-icing chemicals showed that the lower the traffic volumes were, the greater the service life of PMA and JCP, and the less that de-icing chemicals were applied, the greater the service life of JCP. CONCLUSIONS : The dependence of expressway pavement service life on traffic volumes and de-icing chemicals makes it possible to apply LCCA for regional maintenance plans and cost-effective selection of expressway pavement type.

• Journal of Oral Medicine and Pain
• /
• 제24권1호
• /
• pp.69-80
• /
• 1999

OBJECTIVES: This study was designed to measure the minimal cross-sectional areas and volumes of the pharynx in snoring patients and normal subjects and to see if there is an increase in the minimal cross-sectional areas and volumes of the pharynx with advancement of the mandible. METHODS: The pharyngeal computed tomography and 3-dimensional reconstruction were used to measure the cross-sectional areas and volumes of the nasopharynx, oropharynx, and hypopharynx with the jaw in normal position and in protrusive position in 7 patients with snoring and 7 control subjects while they were awake. RESULTS: The oropharynx was revealed to have the most narrow site in the pharynx and there was a tendency for the snorers to have a smaller nasopharyngeal and oropharyngeal cross-sectional area than normal subjects but not statistically significant. There were no significant differences in the volumes of the nasopharynx and oropharynx between the two groups. With advancement of the jaw the minimal cross-sectional area of oropharynx was significantly increased, and the volume was also increased but not significantly. The minimal cross-sectional areas and volumes of nasopharynx as well as hypopharynx were not significantly influenced by the advancement of the mandible. CONCLUSIONS: There was a tendency for snorers to have a smaller oropharynx than normal subjects and the oropharyngeal lumen was increased with the advancement of the mandible in both snorers and normal subjects.

• 스마트미디어저널
• /
• 제9권2호
• /
• pp.22-32
• /
• 2020

The hippocampal volume atrophy is known to be linked with neuro-degenerative disorders and it is also one of the most important early biomarkers for Alzheimer's disease detection. The measurements of hippocampal pure volumes from Magnetic Resonance Imaging (MRI) is a crucial task and state-of-the-art methods require a large amount of time. In addition, the structural brain development is investigated using MRI data, where brain morphometry (e.g. cortical thickness, volume, surface area etc.) study is one of the significant parts of the analysis. In this study, we have proposed a patch-based ensemble model of 3-D convolutional neural network (CNN) to measure the hippocampal pure volume from MRI data. The 3-D patches were extracted from the volumetric MRI scans to train the proposed 3-D CNN models. The trained models are used to construct the ensemble 3-D CNN model and the aggregated model predicts the pure volume in one-step in the test phase. Our approach takes only 5 seconds to estimate the volumes from an MRI scan. The average errors for the proposed ensemble 3-D CNN model are 11.7±8.8 (error%±STD) and 12.5±12.8 (error%±STD) for the left and right hippocampi of 65 test MRI scans, respectively. The quantitative study on the predicted volumes over the ground truth volumes shows that the proposed approach can be used as a proxy.

• 한국도로학회논문집
• /
• 제15권5호
• /
• pp.123-133
• /
• 2013

PURPOSES : The present paper is to compare vehicles' $CO_2$ emissions in roundabouts and signalized intersections. METHODS : The present paper uses the SIDRA software with variables of traffic and road conditions. RESULTS : The results of the study are as follows : First, when entering traffic volumes are more than 1600pcph, vehicle's $CO_2$ emissions in roundabouts are lower than those of signalized intersections regardless of the left turn ratio. Second, When entering traffic volumes are more than 2800pcph, vehicles's $CO_2$ emissions in 2-lane approaches are lower than those of 1-lane approaches in signalized intersection. Third, when entering traffic volumes are more than 1600pcph, vehicle's $CO_2$ emissions of CASE B are lowest. (CASE B is the condition with one exclusive left-turn lane and one exclusive straight lane and one shared straight lane with right-turn.) Also, CASE A is the condition that vehicle's $CO_2$ emissions in roundabouts are lower than those of signalized intersections between 1600pcph and 3600pcph. (CASE A is the condition with one exclusive left-turn lane and one shared straight lane with right-turn.) But, when entering traffic volumes are more than 4000pcph, vehicle's $CO_2$ emissions in signalized intersections is lower than those of roundabouts. CONCLUSIONS : It may be concluded that vehicle's $CO_2$ emissions on roundabouts are much lower than those of signalized intersections, especially, when entering traffics volumes are between 1600pcph and 3600pcph in 1-lane or 2-lane approaches.