• Title/Summary/Keyword: 도로${\cdot}$

Search Result 1,085, Processing Time 0.029 seconds

"건설기술연구성과 발표회"세미나 (2)

  • 한국주택협회
    • 주택과사람들
    • /
    • no.56 s.73
    • /
    • pp.61-91
    • /
    • 1996
  • 이 자료는 한국건설기술연구원이 지난 4월 17, 18일 양일간 개최한 구조$\cdot$도로$\cdot$지반$\cdot$수자원$\cdot$환경$\cdot$건축$\cdot$기전$\cdot$건설관리$\cdot$정보센터 등 총 9개 분야에 대한 ''건설기술연구성과 발표회'' 세미나 자료중에서 주택건설관련 자료만 발췌, 총 4회에 걸쳐 게재합니다.

  • PDF

Analysis of Functional Requirements of Automated Intermodal Freight Transport System (인터모달 자동화물운송시스템 기능 요구사항 분석)

  • Ryu, Hyung-Geun;An, Young-Mo;Lee, Jae-Won
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2019.05a
    • /
    • pp.133-134
    • /
    • 2019
  • 우리나라는 협소한 국토구조 특성상 도로운송 위주의 화물운송체계가 정착되어 있어 내륙수송비 부담 증가, 교통 혼잡, 대기오염 및 소음, 도로파손, 대형교통사고 등 크고 작은 문제가 지속적으로 ${\cdot}{\cdot}{\cdot}{\cdot}$(중략)${\cdot}{\cdot}{\cdot}{\cdot}$ 따라서 본 연구에서는 물류비용 및 서비스를 좌우하는 수송비용과 물류인프라 초기투자비용을 최소화하면서 교통 혼잡, 온실가스배출 등 사회 환경 비용을 절감하기 위한 단절없는 인터모달 자동화물운송 시스템 개념을 정립하고 구성요소 및 요소기술을 ${\cdot}{\cdot}{\cdot}{\cdot}$(중략)${\cdot}{\cdot}{\cdot}{\cdot}$

  • PDF

Studies on the Physical and Thermal Properties of the Chitosan/Gelatin Blend (키토산/젤라틴 블랜드 폴리머의 물리적 및 열적 특성에 대한 연구)

  • Kim, Byung-Ho;Park, Jang-Woo
    • Korean Journal of Food Science and Technology
    • /
    • v.37 no.1
    • /
    • pp.30-37
    • /
    • 2005
  • To mass-produce useful biopolymer films, chitosan/gelatin blend films were prepared by solution casting method. Effects of mixing ratio, tensile strength (TS), elongation (E) at break, total color difference (${\Dalta}E$), opacity, water vapor permeability (WVP), oxygen permeability (OP), and thermal properties on chitosan/gelatin blend films properties were investigated. TS, E, ${\Dalta}E$, opacity, WVP, and OP values were 58.24-22.01 MPa, 13.11-24.67%, 1.86-17.45, 0.3104-1.2161 nmO.D./${\mu}m$, $1.6875-1.7225ng{\cdot}m/m^{2}{\cdot}s{\cdot}Pa$, and $2.2380{\times}10^{-7}-2.2975{\times}10^{-7}\;mL{\cdot}{\mu}m/m^{2}{\cdot}s{\cdot}Pa$, respectively. TS of blend films decreased, while E, ${\Dalta}E$, and opacity increased with increasing chitosan content. WVP of blend films did not show any significant relationship with mixing ratio and thickness of blend films. Miscibility of films was examined over entire composition range by thermogravimetric analyzer (TGA) and dynamic mechanical analyzer (DMA). TGA results showed gelatin is more thermally stable than chitosan and some interactions among functional groups of two biopolymers. Glass transition temperature $(T_{2})$ of films as determined by DMA decreased with increasing content of chitosan in the blend. Results of thermal analysis indicate high miscibility among polymer components in the blend.

A Study on The Frost Penetration Depth of Pavement with Field Temperature Data (도로포장 현장계측 온도데이터를 이용한 도로포장체의 동결깊이 연구)

  • Shin, Eun-Chul;Lee, Jae-Sik;Cho, Gyu-Tae
    • International Journal of Highway Engineering
    • /
    • v.13 no.1
    • /
    • pp.21-32
    • /
    • 2011
  • The frost penetration depth of pavement is usually estimated from the freezing index that made temperature data analysis of 30 years and decided the thickness of anti-frost layer. The field monitoring region in study was divided into five regions by freezing index 550~650$^{\circ}C{\cdot}$day, 450~550$^{\circ}C{\cdot}$day and 350~450$^{\circ}C{\cdot}$day. Each region has three-section of road pavement such as cutting area, boundary area of cutting and banking, and lower area of banking. The field monitoring system was established both in the section of anti-frost layer and in the section without anti-frost layer. The data analysis was conducted for determination of frost penetration depth within the paved road by the field monitoring system. The result showed that The temperature of subgrade without anti-frost layer shows below zero in centigrade for the region of freezing index 550~650$^{\circ}C{\cdot}$day, up and down around zero degree in subgrade for the region of freezing index 450~550$^{\circ}C{\cdot}$day, and there is no place existed below zero degree in subgrade for the region of freezing index below 450$^{\circ}C{\cdot}$day. With comparison of field frost penetration depth for the cross-sections of pavement, the cutting area shows the greatest frost penetration depth, and less influence of frost penetration depth for the boundary area of cutting and banking, and the least influenced for the lower area of banking.

근로자주택건설시행지침

  • 건설부
    • 주택과사람들
    • /
    • s.11
    • /
    • pp.27-42
    • /
    • 1991
  • 동 시행지침은 당부 주기 30417-11103(''90.5.10), 주기 30417-19652(''90.7.31) 및 주기 30417-34972(''92.12.29)로 각 시$\cdot$도에 시달한 근로자주택 건설시행계획 및 근로자주택건설시행지침과 근로자주택 입주대상자 확대 등에 대해 각 시$\cdot$도 및 관계기관, 근로자 등으로부터 여러 질의 건의가 있어 이를 변경 및 보완하고자 하는 의도로 마련된 것임. 각 시$\cdot$도 및 관계기관은 동시행지침을 숙지하여 근로자주택건설을 추진하는 데 착오없으시기 바람.

  • PDF

Studies on the Thermal Properties of Foods -I. Thermal Properties of Some Korean Foods- (식품(食品)의 열특성(熱特性)에 관(關)한 연구(硏究) -제(第) 1 보(報) : 한국고유식품(韓國固有食品)의 열특성(熱特性)-)

  • Chang, Kyu-Seob;Chun, Jae-Kun
    • Korean Journal of Food Science and Technology
    • /
    • v.14 no.2
    • /
    • pp.112-121
    • /
    • 1982
  • Thermal properties of 12 Korean foods were determined by using an apparatus constructed by authors. Specific heat of acorn mook showed the highest value $(0.856\;kcal/kg{\cdot}^{\circ}C)$ and that of Chungkookjang the lowest value $(0.606\;kcal/kg{\cdot}^{\circ}C)$ among 12 foods investigated. Thermal conductivity of the salted wild sesame leaf at the initial temperature of $20^{\circ}C$ was found to be the highest $(0.451\;kcal/m{\cdot}h{\cdot}^{\circ}C)$ among the foods investigated and that of mungbean mook the lowest$0.304\;kcal/m{\cdot}h{\cdot}^{\circ}C$. Thermal conductivity appeared to get higher as the initial temperature increased from $20^{\circ}C\;to\;60^{\circ}C$. Thermal diffusivity of Kochujang was the highest $(0.0877\;cm^2/min)$ and the mungbean mook the lowest($(0.0518\;cm^2/min)$ among the foods investigated. Thermal conductivity of foods also appeared to increase as the initial temperature increased. The difference between the calculated values and the measured values was very small (1.655 residual percent in the statistical analysis).

  • PDF

엄나무 대량번식법 개발 성공 - 농가소득원으로 자리잡을 전망

  • 한국생약협회
    • The Hankook-Saengyark Bo
    • /
    • no.238
    • /
    • pp.5-5
    • /
    • 2000
  • 인삼 뒷그루 작물 6종 선발(하수오$\cdot$더덕$\cdot$고추$\cdot$산약$\cdot$도라지$\cdot$만삼등) - '만삼' 재배 본격연구(경기도 농기원 북부시험장) - 구기자 시설 재배법 확립(60cm*20cm 간격 심으면 수량 향상) - 홍화 하우스재배법 확립(경북도 농업기술원)

  • PDF