• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
• /
• 2003.04a
• /
• pp.383-386
• /
• 2003

이 연구는 주변국의 국가지도제작기관을 분석하고, 측량 및 지도제작을 위한 수치제작 체계 즉, 수치자료기반을 제작하기 위한 체계를 분석하고자 하는 것

• TTA Journal
• /
• s.102
• /
• pp.161-166
• /
• 2005

TTA(한국정보통신기술협회)는 2005년 4월 21일자 산업자원부 고시(제2005-45호)에 따라 대기전력저감프로그램 지정시험기관으로 인정받아 공인인증 시험서비스를 제공하고 있다. 최근 산업자원부는 'Standby Korea 2010'을 발표하면서 전기에너지 저감을 위한 정책 기조를 제시하였다. 이에 발맞춰 TTA는 2005년 11월 KOLAS 시험분야 추가 인증을 시작으로 관련 시험분야의 확대를 추진할 예정이기에 이를 소개하고자 한다.

• Journal of Advanced Marine Engineering and Technology
• /
• v.26 no.2
• /
• pp.200-208
• /
• 2002

The flash temperature of the cam-roller contacting surface for a marine diesel engine was analysed numerically. The elastohydrodynamic lubrication pressure and film thickness were adopted to get more accurate frictional coefficient, heat flux and temperature distribution. The maximum flash temperature was increased with both the increasing slip ratio of the contacting surfaces and increasing external load. This study tells that the temperature analysis is an indispensable procedure in designing elastohydrodynamic lubrication contacts on which the slip occurs.

• Proceedings of the Korean Society of Marine Engineers Conference
• /
• 2000.05a
• /
• pp.22-27
• /
• 2000

This Paper decribes a monitoring system using Modbus protocol and RS485 interface applied in many industrial field. We developed hardware to receive alanlog sensor output and monitoring program to communicate with hardware and carried out experiment with potentiometer for plan sensor, . Through online communication between Master and Slaves we convinced the usage of this systems. Also plant data file that saved in Excel format is convenient in writing various typs of documents.

• Korean Journal of Bronchoesophagology
• /
• v.16 no.1
• /
• pp.55-58
• /
• 2010

Epidermal cyst in the floor of mouth is relatively rare disease. Patients usually present soft and non-tender mass at the midline of mouth floor. Careful history taking and imaging study are needed for the diagnosis and surgical excision is the choice of treatment. We report a case of huge epidermal cyst located in the floor of mouth mimicking plunging ranula, which was successfully removed by transoral surgical excision without any complication. It was diagnosed as an epidermal cyst by pathologic examination.

• Proceedings of the KOR-BRONCHOESO Conference
• /
• 1979.05a
• /
• pp.10.1-10
• /
• 1979

Foreign bodies in the air and food passages are perhaps considered as one of the most frequently observed accidental case in the fields of otolaryngology, and interestingly enough, its mechanism of occurence is well reflected upon our environment and way of daily living. Recently, we experienced a case of foreign body in the right main bronchus of 3 year-old boy, which was successfully removed bronchoscopically.

• Proceedings of the KOR-BRONCHOESO Conference
• /
• 1981.05a
• /
• pp.3.1-3
• /
• 1981

Foreign bodies in the airway are very important and not uncommon conditions in the field of E.N.T., and practically there are many reports of them. Occasionally, it can be followed by serious complications and technical difficulty to remove. Therefore, foreign body in the airway is serious and fatal in some cases. Recently, the authors experienced 8 interesting cases of foreign bodies in the airway and a brief review of literature was made.

• Korean Journal of Bronchoesophagology
• /
• v.3 no.2
• /
• pp.323-326
• /
• 1997

Kimura's disease is a chronic inflammatory disease which often presents as a tumor like swelling in the head and neck region. This lesion is benign but it may easily be mistaken for a malignant tumor. Kimura's disease has been confused with angiolymphoid hyperplasia with eosinophilia(ALHE). The cause is unknown, but theories include autoimmune, allergic, neoplastic, and infectious cause by insect bites and parasites. The treatment of choice is surgical removal. Recently we experienced a case of Kimura's disease occuring in the both side of posterior neck triangle area of a 37 year old male patient who was treated with surgical excision and systemic corticosteroid administration.

• Journal of Advanced Marine Engineering and Technology
• /
• v.24 no.3
• /
• pp.70-78
• /
• 2000

The effects of recirculated exhaust gas on the characteristics of ;$NO_x$ and soot emissions under a wide range of engine load have been experimentally investigated by a water-cooled, four-cylinder, indirect injection, four cycle and marine diesel engine operating at two kinds of engine speeds. The purpose of the present study is to develop the EGR control system for reducing $NO_x$ and soot emissions simultaneously in diesel engines. The EGR system is used to reduce NOx emissions, and a novel diesel soot removal apparatus with a cylinder-type scrubber for the experiment system which has 6 water injectors(A water injector is made up 144 nozzles with 1.0mm in diameter) is specially designed and manufactured to reduce the soot contents in the recirculated exhaust gas to intake system of the engines. The intake oxygen concentration obtained by the intake air flow and the oxygen concentration in the recirculated exhaust gas, and the exhaust oxygen concentration measured in exhaust manifold are used to analyse and discuss the influences of EGR on NOx and soot emissions. The experiments are performed at the fixed fuel injection timing of $15.3^{\circ}$ BTDC regardless of experimental conditions. It is found that $NO_x$ emissions decrease and soot emissions increase owing to the drop of intake oxygen concentration and exhaust oxygen concentration as EGR rate rises. Also, one can conclude that it is sufficient for the scrubber EGR system with a novel diesel soot removal apparatus to reduce $NO_x$ emissions, but not to reduce soot emissions.

• Journal of Advanced Marine Engineering and Technology
• /
• v.39 no.6
• /
• pp.599-603
• /
• 2015

To strengthen the existing regulations with respect to carbon emissions in the marine industry, there has been an increase in the number of studies focusing on realizing improvements in the utilization of vessels. While the development of new techniques related to these improvements can be costly, in this paper, we discuss a cost-effective method that may be applied directly to existing ships. The experimental data obtained suggests that the greatest reduction in energy loses can be realized by installing a double-partition wall on the storage tank of the ship, among other methods.