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김진호(Kim Jin-Ho),한석윤(Han Suk-Yoon),정장용(Jung Jang-Yong),문제우(Mun Je-Woo) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The construction of concrete slab track system is increased recently but the noise level on slab track is 3dB(A) higher than the one on ballast track since most of noise is reflected on slab track. Currently, concrete slab track systems has been designed for Gyungbu high speedline stage 2 and Honam high speed line. For those tracks, noise absorbing blocks are considered. In this paper, noise absorbing blocks were installed at Hwang Hak tunnel for evaluation of noise absorbing blocks and the indoor noise of KTX was measured. The results have done comparative analysis.
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육계 사료 내 매실 및 오미자 첨가가 성장, 혈액 생화학 성분 및 항산화 작용에 미치는 영향
고영현(Young-Hyun Ko),문양수(Yang-Soo Moon),손시환(Sea-Hwan Sohn),정장용(Chang-yong Jung),장인석(Insurk Jang) 韓國家禽學會 2012 韓國家禽學會誌 Vol.39 No.2
To investigate the effect of dietary supplementation of freeze-dried plum (Prunus mume Siebold and Zucc., PMS) or omija meal (Schizandra chinensis Baill.; SCB) on growth performance, organ weights, blood biochemical profiles and antioxidant defense system, a total of 96, 3-day-old male broiler chickens were assigned to three dietary groups: (1) control diet, (2) control diet supplemented with PMS at 0.2%, (3) control diet supplemented with SCB at 0.2%. In vitro antioxidant activity, plum and omija extracts showed a significantly higher radical scavenging activity (RSA). In particular, omija extract showed much higher RSA than plum extract. Dietary addition of plum or omija did not affect body weight, feed intake, feed conversion and the relative weight of digestive organ in birds. Plasma triglyceride significantly (P<0.05) increased in birds fed the diet supplemented with omija compared with those fed control diet without affecting the other blood biochemical components. Furthermore, reduced form of glutathione (GSH) in the liver or muscle significantly (P<0.05) increased in birds fed the diet fortified with plum and omija. However, the specific activities of superoxide dismutase (SOD), glutathione peroxidase (GPX) and glutathione-S-transferase (GST) and MDA (malondealdehyde) in the intestine, liver and muscle were not altered by dietary antioxidant sources. In conclusion, dietary plum and omija resulted in a positive effect on some antioxidant indicators such as increased in vitro RAS in extracts and in vivo GSH level in the liver and muscle without affecting growth performance. Therefore, dietary addition of 0.2% of plum or omija could be applicable as potential antioxidant sources in broiler chick production.
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문제우(Moon Jae-Woo),김태욱(Kim Tae-Wook),이명석(Lee Myung-Suk),정장용(Jung Jang-Yong),김종태(Kim Jong-Tae) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
In this paper, comments on the needs of establishment of railway test line - capable of mid and long term performance evaluation of vehicle/infra/electricity/signal component/system - are described. Based on the previous studies, national/social/economic needs, the states of similar lines of foreign countries, concept of test line, and basic application plan are summarized. Especially, core things needed to the establishment of test line are commented.
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이일화(Lee Il-Wha),이성진(Lee Sung-Jin),이수형(Lee Su-Hyung),방의석(Bang Eui-Seok),정장용(Jung Jang-Yong) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The problems associated with constructing high-speed concrete track embankments over soft compressible soil has lead to the development and/or extensive use of many of the ground improvement techniques used today. Drains, surcharge loading, and geosynthetic reinforcement, have all been used to solve the settlement and embankment stability issues associated with construction on soft soils. However, when time constraints are critical to the success of the project, owners have resorted to another innovative approach. Especially, the design criteria of residual settlement is limited as 30mm for concrete track embankment, it is very difficult to satisfy this standard using the former construction method. Pile net method consist of vertical columns that are designed to transfer the load of the embankment through the soft compressible soil layer to a firm foundation and one or more layers of geosynthetic reinforcement placed between the top of the columns and the bottom of the embankment. This paper will present the guidelines for the design of pile net method to supported embankments. These guidelines were developed based on a review of current design methodologies and a parametric study of design variables using numerical modeling.
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朴成振,鄭場龍 진주산업대학교 1980 論文集 Vol.18 No.-
本 試驗은 卵型과 産卵時刻이 孵化率에 미치는 影響을 규명하기 위하여 White Leghorns 種卵 600여개를 供試하여 1980年 4月 17日∼同年 5月 10日(24日間)에 걸쳐 晋州農林專門大學 附屬牧場에서 실시하여 그 結果를 報告한다. 1. 牛後에 産卵한 種卵의 孵化率(86%)이 牛前에 産卵한 種卵의 孵化率(84%)보다 多少 좋았으나 有異性은 없었다. 2. 産業時刻에 關係없이 정상란이 비정산란에 비해 부화율이 좋았으며 유의성이 인정되었다.(P<0.05). 3. 産卵時刻 관계없이 정산란이 비정상란에 비해 發有中止卵이 적었다. 4. 産卵時間別 發有中止卵은 一次檢卵時에는 午前産卵이 二次檢卵時에는 午後産卵이 多少 적은 傾向이었다. This experiment was carried out to determine the effect of egg shape and laying egg time on the hatchability using 600 eggs laied from one year old WhiteLeghon, and from April 17. 1980 to May 10. 1980(24days)at Jinju Agricultural and Forestry Junier Technical Collage. The results were summarized as follows; 1. The egg of laying egg time of P.M(86%)had a slight good hahtcability than the egg of laying egg time of A.M(84%). However, there was found no significant difference(P<0.05). 2. There was a good hatchability on normal egg than abnormal egg at all of the laying egg time and was found significant difference(P<0.05). 3. There was a small dead embryo on normal egg than abnormal egg at all of the laying egg time. 4. The dead embryo per laying egg time was a slight small dead embryo that first egg inspection was at laying egg time of A.M. and second egg inspection was at laying egg time of P.M
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