• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.11a
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• pp.1023-1027
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• 1996

In this paper, the new technology and R&D status is presented, which accelerates the projectile using the electrical energy to overcome the limit of the conventional gun. The ETC (electro_thermal_chemical) gun, one kind of electric guns, seems to be the highly probable candidate as the next generation gun. The high density power supply and the forming and control of the current pulse are required to develop the ETC gun. And, the interior ballistics considered the mechanism of ETC gun must to be studied.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.145-148
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• 2009

A study on ETC(Electrothermal chemical) Guns has been conducted. The existing code of the numerical analysis for the interior ballistics has been extended for ETC Guns. Using this code, the performance analysis of interior ballistics according to the injection patterns of the plasma energy has been fulfilled.

• Journal of Electrical Engineering and Technology
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• v.7 no.6
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• pp.971-976
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• 2012

A 150 kJ compact capacitive pulsed power system (CCPPS) capable of delivering electrical energy into an electrothermal chemical (ETC) gun on a vehicle has been studied. The CCPPS provides pulsed electrical energy into a capillary plasma injector which generates plasma of tens of thousands $^{\circ}K$ in temperature and has a nonlinear resistance depending on the current. The design requirements of the CCPPS are as follows: the maximum power of 250 MW, the pulse width of about 0.6 ms, the volume of no more than 0.5 cubic meter, the efficiency of energy transfer over 80 % and the repetition rate of 4~5 times per minute. The constructed CCPPS is composed of four 37.5 kJ capacitor bank modules in parallel to make a trapezoid pulse shape and to satisfy the design requirements. Each module is designed to achieve high reliability, safety, efficiency and energy density to endure severe operating conditions. The results of the performance test on the CCPPS using a 120 mm ETC gun are described.

• Journal of the Korean Institute of Rural Architecture
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• v.4 no.1
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• pp.9-18
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• 2002

Keumsan-gun is the area where there are many mobile populations as the place to be adjacent to Daejon. There is the tendency that the empty houses at Keumsan area are increasing as 1,115 houses every year as of 2001. So, this researcher examined and analyzed the actual state by grasping the present situation of empty houses centering around Keumsan-gun. And, this researcher could obtain the following conclusion as the result that this researcher progressed the study so as to present the application scheme of empty houses. As for Keumsan-gun, farming populations are more than other city and gun at Choongcheong Southern Proince Area as the area formed with mountain groups topographically. Thus, it is forecast that the appearance of empty houses will increase, as the population decrease and the residents to have migration plan will appear higher than other city and gun in the future also. Therefore, as for the superannuated empty houses that use is impossible, to service by removing will be helpful to the image uplifting of village. In addition, as for the empty houses that use is possible, the establishment of system to connect buyers by rebuilding them as garden houses and weekend houses etc. through purchase and sale and long-term lease etc. is necessary.

• Korean Institute of Interior Design Journal
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• v.23 no.3
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• pp.21-28
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• 2014

The purpose of this study is to analysis the change of rural house type in Gyeongbuk province. There are 13 Gun(a kind of administrative district) areas in Gyeongbuk province. According to definition of rural area, the scopes of the research of rural houses limited the 12 places rural area(Gun area, excluded Ulleung-Gun) of Gyeongbuk province. The method of study is to compare and analyze about housing situation, structure of house, housing type and housing area etc. through the statistical data of each Gun area and other various data etc. during these 5 years. As a results of the analysis : 1) The supply ratio of housing is steadily decreasing in rural areas. 2) The houses of rural areas are changing from a detached house to multi-household house and small apartment by development near the rural area. 3) The number and area of commercial buildings are gradually increasing because of urbanization of rural areas. 4) The most houses inside area scopes in the rural area was from $60m^2$ to $85m^2$ area. And the family types of rural house are changing from large family to nuclear family and single households. 5) The structure of rural houses is changing from the brick house type to lightweight steel construction house because of cost-cutting of construction and easy way to construct etc.

• The Journal of Information Technology
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• v.10 no.3
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• pp.121-129
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• 2007

This study aimed at analyze the Regional Information of Geumsan-gun, Chung-Nam, Korea. The study area, the Geumsan-gun, is located in $35^{\circ}57'{\sim}36^{\circ}17'N$, $127^{\circ}19'{\sim}127^{\circ}39'E$. The Landforms, and Drainage network were analyzed from topographical maps on 1:25,000 & 1:50,000 and field survey. The Climate, Population, Economy, Transportation and etc. were analyzed from regional statistics. The results are as follows: The Centripetal forces of unit areas are not powerful because Geumsan-gun located contiguity with Daejeon metropolitan city. The accessibility of Geumsangun is good and is available for a site of specialized agriculture area.

• Journal of Advanced Marine Engineering and Technology
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• v.18 no.2
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• pp.64-74
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• 1994

The gundrill is capable of machining for having large length to diameter ratio in single pass. The techniques of gundrill and gun boring began developing in the late 18th century with the need for more accurate bores in rifle, cannon, machinery part and marine part etc. The main feature of the gun drilling provides a stabilizing cutting force resultant necessary for self guidance of the drill head. A study of the accuracy and surface finish of holes produced would reveal quite useful information regarding the process. The thesis deals with the experimental results obtained during gun drilling on marine part materials for different machining conditions.

• Journal of Agricultural Extension & Community Development
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• v.20 no.3
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• pp.643-678
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• 2013

The purposes of study are to examine early appearance of rural village development that local administration firstly promoted through the 'Mobum Burak Development' promoted in environment change around the local government in 5 16 military government period and find implications of the current rural village development. During the military government period(1961~1963), rural administration showed lots of changes such as reorganization of administration system whose basic local government are si gun, introduction of national planning system and spread of si gun, reorganization of rural taxation system, diversification of extension caused by the establishment of rural facilities such as new Nong-hyup, RDA, etc. Thus, the main axis of development administration of counties was transferred from central government or American aid organization to local administration. According to the basic operation plan introduced after the 5 16 as a planning system, the Ministry of Home Affairs instructed to write and promote gun construction plan based on all conditions of gun as long-term general plan of rural development. Therefore, each do established general plans such as 'Nongdo Jeonbuk Geundaehwa Plan', 'Yakjin Gyeongbuk Plan', 'Jeonnam Miraesang', etc. and Mobum Burak Development was promoted by all kinds of titles such as 'Bogoganeun Maeul(Jeonbuk)', 'Bitnaneun Maeul(Chungnam)', 'Hyeokmyeong Chon(Gyeonggi)', 'Saemaeul geonseol(Gyeongnam)', etc. as a business of rural village development. But, business contents of gun's 'construction plan' couldn't be mutually connected although Mobum Burak Development and unit business contents were promoted by duplicated plan. It became useless general plan as times went by as business focusing on short-term outcomes rather than construction based on long-term region. Mobum Burak Development also borrowed contents community development business, but military government couldn't approach basic solution of village and regional agriculture by focusing on short-term outcome, without imitation of form and procedure. This study is judged to be utilized as basic data of following studies because rural village development companies focusing on national policies discovered unit rural companies and analyzed them by connecting to environment changes of rural administration.

• Proceedings of the Korean Aquaculture Society Conference
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• 2003.10a
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• pp.93-94
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• 2003

To investigate the food organisms of the Acentrogobius elongata during the juveniles stage, the stomach contents of fish, captured in the intertidal zone of Chungchongnam-do Sochon-gun Su-myon Dodun-ri between on early in June from the end of May 2000, were observed. Total length of the fingerings of A. elongata was 1.0~3.0cm size, and the participation rate of feeding was 68.6%. Main food organisms were such as copepods, shrimp larvae, polychaete larvae, and these occupied more than dry weight 4%. Copepods among them dominated the most quantitys by average 64.6%, and food organismsms appeared by order of polychaete larvae and shrimp larvae etc.. Therefore, most important food organisms of fingerlings stage of A. elongata were copepods, polychaete larvae, shrimp larvae etc.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.359-360
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• 2002

To investigate the food organisms of the Tridentiger trigonocephalus during the juveniles stage, the stomach contents of fish, captured in the intertidal zone of Chungchongnam-do Sochon-gun Su-myon Dodun-ri between on early June from end if may 1999, were observed. Total length of the juveniles of T. trigonocephalus was 5.5mm∼9.0mm size, and the participation rate of feeding was 68.5%. Main food organisms were such as copepods, amphipods, shrimp larvae, polychaete larvae, and these occupied more than dry weight 2%. Copepods among them dominated the most quantitys by average 67.5%, and next, food organismsms appeared much by order of polychaete larvae and shrimp larvae etc.. Therefore, most important food organisms of juvenile stage of T. trigonocephalus were copepods, polychaete larvae, shrimp larvae etc.