• 유체기계공업학회:학술대회논문집
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• 2004.12a
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• pp.715-725
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• 2004

• CDE review
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• v.18 no.1
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• pp.21-27
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• 2012

• The Magazine for Energy Service Companies
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• s.3
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• pp.36-37
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• 2000

• 월간산업보건
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• s.291
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• pp.2-5
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• 2012

• International Journal of Highway Engineering
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• v.9 no.1 s.31
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• pp.47-56
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• 2007

Resilient characteristics on unbound pavement materials have been adopted for design and nonlinear analysis of pavement structure under traffic loadings. However, relatively few studies have been done on the nonlinear resilient behavior of unbound materials in Korea. In addition to that, only the limited information is available for estimating the resilient modulus values on subgrade soils. In this study, a laboratory resilient-deformation test under repeated loadings is performed in order to establish the nonlinear characteristics of unbound subgrade soils in test roads. Then, a constitutive model that correlates the resilient modulus with moisture and stress state from field condition is proposed respectively. The results from all procedures are presented in this paper. Finally, a comparative analysis is conducted to identify the proper models in the stress dependent modulus and seasonal moisture condition of subgrade soils in test roads respectively.

• Journal of Acupuncture Research
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• v.22 no.6
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• pp.165-171
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• 2005

목적 : 견관절 질환의 대부분의 원인을 차지하는 극상근건과 견봉하 점액낭 질환 침치료에 있어서 근위취혈의 관점으로 접근했을 때 손상된 조직인 극상근건과 견봉하 점액낭에 자입하는 것이 중요하다. 어떻게 이 조직에 접근할 것인가에 대해 X선 촬영을 통해 확인해 보고자 한다. 방법 : 4명의 지원자를 받아서 견우혈(LI 15), 거골혈(巨骨穴)(LI 16), 노상혈(UE 57)의 혈자리에 투시촬영을 이용해 자침을 하였다. 투시촬영으로 원하는 조직에 침이 자입되었음을 확인한 후 X선 촬영을 하여 확인하는 방법으로 진행하였다. 결과 : 견우혈(LI 15) 자침시(刺針時) 5cm의 깊이로 직자(直刺)할 때 원하는 조직인 근상근건과 견봉하 점액낭에 도달하는 것을 확인할 수 있었다. 거골혈(巨骨穴)(LI 16) 자침시(刺針時) 5cm의 깊이로 노상혈 부위로 하사자(下斜刺) 했을 때, 노상혈(UE 57) 자침시(刺針時) 5cm의 깊이로 거골혈(巨骨穴) 부위로 상사자(上斜刺) 했을 때 극상근건과 견봉하 점액낭에 도달함을 확인할 수 있었다. 결론 : 극상근건과 견봉하 점액낭 질환을 근위취혈의 관점으로 치료하고자 할 때 견우혈, 거골혈(巨骨穴), 노상혈에 정확한 깊이와 방향으로 자입을 해야 원하는 조직인 극상근건과 견봉하 점액낭에 자입할 수 있음을 확인할 수 있었다.

• Journal of Life Science
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• v.20 no.3
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• pp.374-380
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• 2010

The objective of this research was to evaluate the inhibitory activities of phenolic compounds isolated from Cheomoknosang callus on Helicobacter pylori. Total phenolic compounds of 80% ethanol extracts from callus were 15.3 mg/g. The activity of H. pylori inhibition at 80% ethanol extracts from Cheongmoknosang callus was determined as 14 mm clear zone. Isolation of inhibitory compounds was carried out on Sephadex LH-20 and MCI-gel CHP-20 column chromatography using a gradient elution procedure of increasing MeOH in $H_2O$. The chemical structure of the inhibitory compound against Helicobacter pylori was confirmed as protocatechuic acid, chlorogenic acid, caffeic acid and rosemarinic acid by spectroscopic analysis of FAB-MS, NMR and IR spectrum.

• Journal of the Korean Geographical Society
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• v.44 no.6
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• pp.761-778
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• 2009

This study investigates and proves the historical facts about the confidential land survey on Korean peninsula made by Japanese intelligence officers at the end of Chosun Dynasty. Under the command of general staff office of Japanese army, the military officers produced several maps through road map measurements and visual measurements. Although previous literature indicated road map measurements on Korea were originally implemented from 1885, this study confirms that road map measurements were initiated in 1882 by a lieutenant Isobayashi. Reflecting secret map making procedures, the individual military intelligence officers had specialized roles for swift information collection and map production.

• Korean Journal of Environment and Ecology
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• v.20 no.4
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• pp.400-406
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• 2006

To investigate the incidence of the road-kill of amphibians and reptiles in Songgye valley, Woraksan National Park, a survey of Songgye valley was conducted from January, 2003 to December, 2005. Before the investigation, the survey area was divided into 50 sites at 300m intervals. As a result, road-kill by vehicles were confirmed to affect 40% of the amphibians and 68.3% of the reptiles among the total species in the Woraksan National Park. The most affected species was Rana dybowskii, with a frequency of 94.9% among the total number of road-killed Individuals. The highest road-kill rate occurred between April to May, every year. Therefore, it is necessary to construct an eco-bridge and to perform the continuous ecological monitoring for the conservation of R. dybowskii including other species.

• International Journal of Highway Engineering
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• v.9 no.4
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• pp.55-63
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• 2007

Deformational characteristics of subgrade soils are important properties in the mechanistic analysis and design of pavement system. In this study, to evaluate the effect of specimen construction methods on deformational characteristics of subgrade soils in Korea, resonant column tests were performed for specimens constructed by various methods. Specimen construction method affected to the modulus value but the variation in the normalized modulus reduction curve was almost identical. The effects of specimen construction method on modulus are decreased with increasing confining pressure. The average maximum variation in the modulus value with different specimen construction methods was estimated as 16.8%. The differences in the modulus value of the specimens with same water content and dry density conditions that made by gyratory compaction and impact compaction were very small within 5.2%. The impact compaction method was proposed as a specimen construction method for determining the design input parameter testing considering that impact compaction method is much simpler and require less expensive specimen construction equipment and setup than gyratory compaction method.