• Title/Summary/Keyword: Tailoring

Search Result 294, Processing Time 0.021 seconds

Early Tailoring Thoracoplasty in Patients Undergoing Pulmonary Resection (폐의 부분 절제시 조기 변형식 흉곽성형술의 임상적 의의)

  • Lee, Sam-Yun;Yang, Hyeon-Ung;Choe, Jong-Beom;Choe, Sun-Ho
    • Journal of Chest Surgery
    • /
    • v.30 no.4
    • /
    • pp.396-401
    • /
    • 1997
  • Tailoring thoracoplasty is employed prior to, following, or concomitant with pulmonary resection when it is anticipated that insufHclent lung tissue will remain to fill the pleural space following a pulmonary resection. This study reviewed a series of eight patients treated with tailoring thoracoplasty between 1990 and 1995. Indications were to close a persistent space In four patients and to tailor the thoracic cavity to accept diminished lung volume concomitant with a pulmonary resection in the other four patients. The primary underlying disease was lung cancer in three patients and pulmonary tuberculosis In five patients, two of whom had concomitant aspcrgilloma, two, pneumothora , and one, empyema with bronchopleural fistula. In four patients with a prior pulmonary resection, the tailoring thoracoplasty was performed within eight days after the resection surgery. There was no failure to accommodate the thoracic cavity to insufficient lung tissue, even though two patients needed a second thoracoplasty. We conclude that tailoring thoracoplasty may be performed to close anticipated persistent pleural space and to accommodate diminished lung volume with acceptable cosmetic results Early, after, or concomitant with pulmonary resection in selected patients.

  • PDF

Co-firing of Solid Oxide Fuel Cell Using Pore Former (기공전구체를 이용한 고체전해질 연료전지의 동시소성 연구)

  • 문지웅;이홍림;김구대;김재동;이해원
    • Journal of the Korean Ceramic Society
    • /
    • v.35 no.3
    • /
    • pp.273-279
    • /
    • 1998
  • Unite cell of soid oxide fuel cell (SOFC) that consists of a dense yttria-stabilized zirconia(YSZ) electrolyte a porous nickel-YSZ cermet anode and a porous strontium- doped lanthanum manganate(LSM) cathod was fabricated from using pore former through co-firing technique. Initial sintering shrinkage rates of each layer were identified for fabricating SOFC. Heterogenous sintering was very effective in tailoring shrinkage rate for three layers. The powder tailoring necessary for shrinkage rate matching are as follows ; electrolyte of 60% TZ8YS/ 40% TZ8Y mixture anode of 51wt% NiO/49 wt% (70wt% TZ8YS/30 wt% UT ZrO2) mixture and cathode of 80% LSM/20% UT ZrO2 mixture . The overall sintering shrinkage rate differences of three layers using these compositions were maintained in a few percent.

  • PDF

Error Analysis Study on the Veering of Marine Target and the Midcourse Guidance of Anti-ship Missile (해상표적의 변침과 대함유도탄의 중기유도 오차분석 연구)

  • Kim, In-Soo
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.23 no.6
    • /
    • pp.582-590
    • /
    • 2020
  • This paper presents the results of new error analysis on the veering of marine target with the concept of frequency of occurrence, and shows how to apply the midcourse guidance errors of anti-ship missile. The veering error would be a dominant factor in the midcourse guidance errors with flight time increase. This study suggests the reasonable application method of the veering error based on the characteristics of abnormal error, and describes the tailoring method including trade-off between the midcourse guidance range of veering target and the value of frequency of occurrence on veering error.

Tailoring the Static Characteristics of Implanted VCSELs with the Implant and Metal Aperture Radii (임플랜트 및 금속전극 반경에 따른 임플랜트 VCSEL 정특성의 변화)

  • Kim, Tae-Yong;Kim, Sang-Bae;Park, Bun-Jae;Son, Jeong-Hwan
    • Journal of the Institute of Electronics Engineers of Korea SD
    • /
    • v.41 no.7
    • /
    • pp.37-41
    • /
    • 2004
  • We have formulated an empirical analytic model for the static characteristics of implanted vertical-cavity surface-emitting lasers (VCSELs). Specifically, we have derived analytic formulas for the threshold current, slope efficiency, dynamic resistance, and the output power and forward voltage at the operation current of 12 ㎃ in terms of the implant and metal-aperture radii by fitting the measured results. The radii of the metal aperture and implant mask of the 850 nm VCSELs range from 4 to 12.5 ${\mu}{\textrm}{m}$ and 7 to 17.5 ${\mu}{\textrm}{m}$ respectively. The model shows the way of tailoring the VCSEL characteristics by changing the mask dimensions only.

A Study on Application of Systems Approach for Laser Micro Machining Design Process (시스템적 접근을 통한 레이저 미세가공 설계 프로세스 개발에 관한 연구)

  • Moon, Seong-Wook;Park, Young-Won;Nam, Gi-Jung
    • Laser Solutions
    • /
    • v.10 no.3
    • /
    • pp.15-24
    • /
    • 2007
  • In this paper laser micromachining system design process for commercialization is suggested. The constructed system design process is properly adjusted for laser micromachining area after tailoring engine process of system engineering process such as requirement analysis, functional analysis and allocation, system synthesis and system optimization process. In the current laser machining system design, system components and specifications are determined on the basis of experimental experience which a laser is being used in machining some materials as well as the current machining and research trend. In this paper, however, systematic process is suggested in addition to experimental experience, which the laser and system components and their specifications are decided in the process of definition of functional requirements and engine design variables of system to satisfy the customer's requirements.

  • PDF

Defining and Tailoring R&D Standard Process to Improve the Quality of R&D Outcomes (연구개발 결과물의 품질 향상을 위한 연구개발 표준 프로세스 정의 및 프로젝트 프로세스 조정)

  • Ryoo, Won-Ok;Jung, Hyo-Taeg
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.43 no.2
    • /
    • pp.112-119
    • /
    • 2017
  • Korea's national R&D projects are increasing year by year. However, it is necessary to improve the quality of R&D result. In this paper, we introduce the developing and adjusting the R&D standard process based on process approach in ETRI. It is expected that the definition of R&D standard process will contribute to improve customer satisfaction and quality of R&D result through standardization and continuous improvement activities.

Study of Vibration Test Condition for Machinery Component (기계류부품의 가진시험 조건에 관한 연구)

  • Kim Hyoung-Eui;Park Jong-Won;Jung Dong-Soo;Kang Bo-Sik
    • Journal of Applied Reliability
    • /
    • v.6 no.1
    • /
    • pp.27-36
    • /
    • 2006
  • It is increasingly important to ensure that a given vibration test specification of a particular machinery component is appropriately established by considering its real environmental conditions. Vibration test standards for electrical components are well documented, for example in an IEC 60068 series, while standards for machinery components are rarely found except a few military standards. Thus many vibration tests are performed based on the military standards. However, a test based on these military standards often results in over-testing, and under-testing in some cases due to the different environmental conditions. Also, these standards require an appropriate tailoring that may not be easily accomplished. In this paper, various international and military standards are compared and investigated to obtain test specifications relevant for machinery components. Also appropriate tailoring methods are demonstrated through a case study.

  • PDF