도시 집합주거 계획방법에 관한 연구 : 중층·고밀 중정형 집합주거를 중심으로 Focused on the high-density and medium-height, Courtyard Housings

鄭在容,張一文 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

This paper aims to study the applicability of the high-density and medium-height, courtyard housing in Korea, by examining the relationship of urban constraints and residential environmental needs in terms of architecture. This study examined two aspects in particular. They are the overall planning techniques and the theory to understands the residential environmental requirements of the high-density and medium-height, courtyard housing. Thereafter, this study attempts to deduce the characteristic of detail plan by analysing appropriate institutional and legal restriction and it's the plan for improvement to be applied in Korea.

Quantitative Evaluation of Patient-Specific Quality Assurance Using Online Dosimetry System

정재용,신영주,손승창,민정환,김연래,김동수,최보영,서태석 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.2

In this study, we investigated the clinical performance of an online dosimetry system (Mobius FX system, MFX) by 1) dosimetric plan verification using gamma passing rates and dose volume metrics and 2) error-detection capability evaluation by deliberately introduced machine error. Eighteen volumetric modulated arc therapy (VMAT) plans were studied. To evaluate the clinical performance of the MFX, we used gamma analysis and dose volume histogram (DVH) analysis. In addition, to evaluate the error-detection capability, we used gamma analysis and DVH analysis utilizing three types of deliberately introduced errors (Type 1: gantry angle-independent multi-leaf collimator (MLC) error, Type 2: gantry angle-dependent MLC error, and Type 3: gantry angle error). A dosimetric verification comparison of physical dosimetry system (Delt4PT) and online dosimetry system (MFX), gamma passing rates of the two dosimetry systems showed very good agreement with treatment planning system (TPS) calculation. For the average dose difference between the TPS calculation and the MFX measurement, most of the dose metrics showed good agreement within a tolerance of 3%. For the error-detection comparison of Delta4PT and MFX, the gamma passing rates of the two dosimetry systems did not meet the 90% acceptance criterion with the magnitude of error exceeding 2 mm and 1.5, respectively, for error plans of Types 1, 2, and 3. For delivery with all error types, the average dose difference of PTV due to error magnitude showed good agreement between calculated TPS and measured MFX within 1%. Overall, the results of the online dosimetry system showed very good agreement with those of the physical dosimetry system. Our results suggest that a log file-based online dosimetry system is a very suitable verification tool for accurate and efficient clinical routines for patient-specific quality assurance (QA).

Obtaining Maximal Stability with a Septal Extension Technique in East Asian Rhinoplasty

정재용 대한성형외과학회 2014 Archives of Plastic Surgery Vol.41 No.1

Recently, in Korea, the septal extension graft from the septum or rib has become a common method of correcting a small or short nose. The success rate of this method has led to the blind faith that it provides superior tip projection and definition, and to the failure to notice its weaknesses. Even if there is a sufficient amount of cartilage, improper separation or fixation might waste the cartilage, resulting in an inefficient operation. Appropriate resection and effective fixation are essential factors for economical rhinoplasty. The septal extension graft is a remarkable procedure since it can control the nasal tip bidirectionally and three dimensionally. Nevertheless, it has a serious drawback since resection is responsible for septal weakness. Safe resection and firm reconstruction of the framework should be carried out. Operating on the basis of the principle of “safe harvest” and rebuilding the structures is important. Further, it is important to learn several techniques to manage septal weakness, insufficient cartilage quantity, and failure of the rigid frame during the surgery.

[행복일기] 나는야 동화 아저씨

정재용 샘터사 2011 월간 샘터 Vol.492 No.-

Synthesis and electronic transport properties of Sn-filled/Tedoped CoSb3

정재용,박관호,김일호 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.5

Sn-filled/Te-doped CoSb3 skutterudites (SnzCo4Sb11.2Te0.8) were prepared by encapsulated induction melting, and their electronic transport properties were investigated. A single δ-phase was obtained successfully by a subsequent isothermal heat treatment at 773 K for 5 days. The Seebeck coefficient and Hall coefficient confirmed that all the samples exhibited n-type conductivity. Te atoms acted as electron donors by substituting for Sb atoms. The temperature dependence of the electrical resistivity suggested that SnzCo4Sb11.2Te0.8 is a highly degenerate semiconducting material. The lattice contribution was found to be dominant over the thermal conductivity of SnzCo4Sb11.2Te0.8.

코중격내림근의 해부학적 고찰 및 임상적 적용

정재용,오상하,이승렬,강낙헌,김동운 대한미용성형외과학회 2009 Archives of Aesthetic Plastic Surgery Vol.15 No.1

Hyper-activated depressor septi nasi is an important factor caused a nasal tip drooping and many studies have been carried out, however it still remains controversial. This study presents a surgical modality for its intervention, based on the anatomical study. Eleven fixed and six fresh cadavers were used for the study. We found that the depressor septi nasi was consisted of three fascicles. Medial fascicles were inserted into the dermocartilaginous ligament, and deep fibers of the medial fascicles were attached to the anterior nasal spine. After superficial fibers were interdigitated with the orbicularis oris, they were attached to the alveolar bone. Intermedial fascicles were inserted to the footplates of the medial cruses and the caudal septum. After they were interdigitated with the medial fascicle and the orbicularis oris, they were attached to the alveolar bone. From April to August 2008, five patients had surgical intervention for hyper-activated depressor septi nasi. Medial and intermedial fascicles were detached completely from the anterior nasal spine and the septum through intranasal approach. Tip droopings were improved in all cases. Specific complications were not found. We believe that surgical intervention through intranasal approach is a useful method for correction of tip drooping.

해상교통안전진단시 안전대책의 시행주체에 관한 고찰 2

정재용 해양환경안전학회 2016 해양환경안전학회 학술발표대회 논문집 Vol.2016 No.04

광섬유의 선형복굴절 보상에 따른 170 kV GIS용 전류 센서의 출력 특성

정재용,김병태,Jeong Jae-Yong,Kim Byung-Tai 대한전기학회 2005 전기학회논문지C Vol.54 No.2

The optical CT was developed to use twisted fibers for 170 kV GIS. The fiber sensor optimized on the optical CT was wound 3 turns and twisted 4 times per a turn at the pipe with a diameter of 130 mm. The measurement error for the linearity which was satisfied the criterion of 'IEC Class-1.0' was less than ± 0.44 % at the transmission type and ± 0.82 % at the reflection type to 2,000 A. At a low current to 200 A, the measurement error was ± 0.69% at the transmission type and ± 1.38 % at the reflection type.

미용코성형술에서 코뼈자름술의 적용

정재용,경현우,오상하,강낙헌,유용아 대한미용성형외과학회 2010 Archives of Aesthetic Plastic Surgery Vol.16 No.1

Nasal osteotomy for aesthetic results is required in patients who have broad nasal bone. Since the procedure is difficult, many operators hesitate the surgery. From January 2007 to July 2009, we performed 77 cases of nasal osteotomy, consisting of paramedian oblique medial osteotomy or median oblique-medial osteotomy and percutaneous lateral osteotomy. Most of the patients had satisfying results, however three patients had asymmetric shape and inappropriate inward movement of nasal bone which required revision with percutaneous lateral osteotomy. Osteotomy procedure varies,depending on surgeon’s preference and experience, however, each surgeon should be aware of good and weak points of those procedures and use the most suitable method. In order to achieve maximal satisfying results, preoperative analysis of patients and minimal invasive handling should be done. Based on these efforts, this method could broadly be used in the aesthetic field. (J Korean Soc Aesthetic Plast Surg 16: 15, 2010)

짧은코변형에서 코외피의 연장방법 : 가로코근걸이 해리와 코경첩 부위 근육융합체의 분리

정재용,유용아,강낙헌,오상하 대한미용성형외과학회 2010 Archives of Aesthetic Plastic Surgery Vol.16 No.2

Cartilage extension and nasal envelop expansion play a main role incorrecting short or contracted nose. Despite numerous studies for cartilage expansion, there has been no reports of nasal skin elongation methods. We hereby preport a new method for expansion of nasal envelop with a comprehensive understanding of anatomical structures. From April 2009 to September 2010, 6 patients underwent operations to correct short or contracted nose. Two separating procedures were included for nasal envelop elongation; division of muscle (Procerus, Transverse nasali, Levator labii superior alaque nasi: PTL muscles) confluence located at nasal hinge and release of transverse nasalis sling. To estimate the degree of nasal envelop extension, forced skin traction test was performed. Comprehensive research with fresh cadaver was held to study the relationship between nasal SMAS and surrounding structures. Average 3.8 mm elongation was documented by forced skin traction testafter the procedure. In the fresh cadaver study, transverse nasalis sling and PTL muscle confluence were firmly attached to the supportive framework. From our clinical experience and cadaver study, we discovered that release of transverse nasalis sling and division of PTL muscle confluence are the main factors for nasal envelop expansion in short or contracted nose.