• Title/Summary/Keyword: T1 slope

검색결과 344건 처리시간 0.026초

교통약자를 고려한 보도의 경사도와 높이 결정을 위한 실험연구 (Experimental Study on the Determination of Slope and Height of Curbs Considering the VRUs)

  • 김현진;임준범;최병호;오철;강인형
    • 한국도로학회논문집
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    • 제20권1호
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    • pp.107-115
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    • 2018
  • PURPOSES : As the population of the mobility handicapped, who are classified as the disabled, the elderly, pregnant women, children, etc., has increased, the voices for guaranteeing their rights have been increasing as well. Thus, the design manuals for roads and sidewalks for the mobility handicapped were developed by the local government, such as the Ministry of Land, Transport, and Tourism, in Seoul City. However, according to the 2013 survey results of the Seoul Metropolitan City, the mobility handicapped still feel uncomfortable with the sidewalks, and particularly request for the improvement of the step and slope of the sidewalk curb. Therefore, in this study, we conducted an empirical experimental study to determine the slope of the sidewalk curb and height of the steps considering the mobility handicapped and analyzed whether there is a statistically significant difference. METHODS : The methodology of this study is an empirical experimental one. In the study, five non-disabled people, 10 wheelchair users, and 10 eye patch and stick users walked about 2-3 min on the sidewalk plates of the sloped type (0%, 5%, 6.3%, 8.3%) and stepped type (0 cm, 1 cm, 3 cm, 6 cm), and their human physiological responses, such as the skin temperature, volume of perspiration on forehead and chest, and heart rate, were measured and recorded. After combining the data, we conducted a nonparametric test, ANOVA, or t-test to determine whether there was a statistically significant difference according to each slope and step type. RESULTS : It was found that for the non-disabled, there was no significant difference in human physiological responses according to the slope and steps of the sidewalk. It can be said that the non-disabled do not feel much physiological discomfort while walking. In the case of the sloped sidewalk plate, the heart rate of the wheel chair users increased when the slope was 6.3%. In the case of the eye patch and stick users, the volume of perspiration on the chest increased at a slope of 5.0%. In general, it is judged that a sidewalk with a slope that is less than 5% does not cause a change in the physiological response. In the case of a stepped sidewalk plate, when 0 cm, 1 cm, and 3 cm were compared for wheelchair users, the amount of forehead perspiration increased from 1 cm. Meanwhile, in the case of the eye patch and stick users, when 0 cm and 6 cm were compared, the amount of perspiration on the forehead and chest as well as the heart rate all increased at 6 cm. Taken together, in the case of wheelchair users, a difference was shown when the height of the step of the sidewalk plate was 1 cm, suggesting that installing it at 0 cm does not cause any physiological discomfort. Moreover, in the case of the eye patch and stick users, when comparing only 0 cm and 6 cm, 0 cm was considered to be suitable, as there was a difference in physiological response at 6 cm. CONCLUSIONS : In this study, we set the human physiological responses such as chest skin temperature, amount of perspiration, and heart rate as evaluation items, and our study was considered to be a meaningful experiment that targeted wheelchair users as well as eye patch and stick users. The validity of the evaluation items was confirmed, as the results of human physiological responses were significant. As for the sidewalk design, according to the experiment result, it is considered that differential application should be implemented according to the type of mobility handicap, rather than uniformly applying a sidewalk step of 2 cm and sidewalk slope of 1/25, which are the current legal standards.

0.3 um급 Inverse-T Gate 모스와 LDD 모스의 전류구동력 및 신뢰성 특성비교 (Characterization of Current Drivability and Reliability of 0.3 um Inverse T-Gate MOS Compared with Those of Conventional LDD MOS)

  • 윤창주;김천수;이진호;김대용;이진효
    • 전자공학회논문지A
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    • 제30A권8호
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    • pp.72-80
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    • 1993
  • We fabricated 0.3um gate length inverse-T gate MOS(ITMOS) and conventional lightly doped drain oxide spacer MOS(LDDMOS), and studied electrical characteristics for comparison. Threshold voltage of 0.3um gate length device was 0.58 V for ITMOS and 0.6V for LDDMOS. Measured subthreshold characteristics showed a slope of 85mV/decades for both ITLDD and LDDMOS. Maximum transconductance at V S1ds T=V S1gs T=3.3V was 180mS/mm for ITMOS and 163mS/mm for LDDMOS respectively. GIDL current was observed to be 0.1pA/um for ITOMS and 0.8pA/um for LDDMOS. Substrate current of ITMOS as a function of drain current was found to be reduced by a foactor of 2.5 compared with that of LDDMOS.

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폴리스티렌/혼합용매 계에서 사슬의 팽창에 대한 새로운 스케일링 파라미터의 적용 (Application of a New Scaling Parameter to Chain Expansion in the Systems of Polystyrene/Mixed Solvents)

  • 박일현;이동일;황미옥;유영철;박기상
    • 폴리머
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    • 제31권2호
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    • pp.98-104
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    • 2007
  • 다양한 분자량의 폴리스티렌을 벤젠/n-헵탄, 1,4-다이옥산/이소프로판올, 1,4-다이옥산/n-헵탄과 같은 3종류의 혼합용매 계에 녹인 뒤 온도 상승에 따른 사슬의 팽창거동을 Flory $\Theta$온도 이상에서 점성도법으로 측정하였다. 온도 상승에 따라 두 종류의 영역, 즉 고분자 사슬이 팽창하는 영역과 수축하는 영역으로 구별되며, 분자량이 클수록 최대팽창온도가 높게 나타났다. 하나의 혼합용매 계 내에서는 $\tau/\tau_c$ 파라미터로 서로 다른 분자량의 사슬 팽창에 대하여 만능성이 나타나지만 서로 다른 혼합용매 계 사이에서는 각각의 기울기를 보임으로써 만능성이 관찰되지 않았다. 그러나 새로운 실험적 $b^{2/3}\tau/\tau_c$ 파라미터를 도입할 경우 모든 혼합용매 계의 사슬 팽창의 데이터들은 하나의 직선 위에 놓임으로써 만능성은 다시 회복되었다. 여기서 $\tau$$(T-\Theta)/\Theta$$\tau_c$$(\Theta-T_c)/T_c$로 각각 정의되며, $T_c$는 임계용액온도를 의미하며, b는 Schultz-Flory 식에서 $1/T_c$$1/M_w^{1/2}$에 대한 유효 기울기이다.

Approach for Microwave Frequency Measurement Based on a Single Photonic Chip Combined with a Phase Modulator and Microring Resonator

  • Zhang, Jiahong;Zhu, Chuyi;Yang, Xiumei;Li, Yingna;Zhao, Zhengang;Li, Chuan
    • Current Optics and Photonics
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    • 제2권6호
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    • pp.576-581
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    • 2018
  • A new approach for identification of a microwave frequency using an integrated optical waveguide chip, combined with a phase modulator (PM) and two microring resonators (MRRs), is proposed, theoretically deduced, and verified. By wavelength tuning to set the PM under the condition of a double side band (DSB), the measurement range can be started from the dc component, and the measurement range and response slope can be adjusted by designing the radius and transmission coefficient of the MRR. Simulations reveal that the amplitude comparison function (ACF) has a monotonic relationship from dc to 32.5 GHz, with a response slope of 5.15 dB under conditions of DSB modulation, when the radius values, transmission coefficients, and the loss factors are designed respectively as $R_1=400{\mu}m$, $R_2=600{\mu}m$, $t_1=t_2=0.63$, and ${\gamma}_1={\gamma}_2=0.66$. Theoretical calculations and simulation results both indicate that this new approach has the potential to be used for measuring microwave frequencies, with the advantages of compact structure and superior reconfigurability.

덕유산지역 계곡부의 해발고와 사면부위에 따른 삼림구조 (Forest Structure in Relation to Altitude and Part of Slope in a Valley Forest at T$\v{o}$kyusan Area)

  • 박인협;문광선;최영철
    • 한국환경생태학회지
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    • 제7권2호
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    • pp.181-186
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    • 1994
  • 덕유산지역 신대휴게소-지봉 계곡부(해발 750~1,247m)의 해발고와 사면부위에 따른 삼림구조를 조사하기 위하여 해발고와 사면부위에 따라 48개 조사구를 설치ㆍ조사하였다. 해발고가 높아질수록 교목층 밀도는 감소하는 반면 평균흉고직경은 증가하는 경향을 보였다. 해발고가 높아짐에 따라 중요치가 증가하는 경향을 보이는 수종은 신갈나무, 고로쇠나무, 들메나무 등이었으며 감소하는 수종은 졸참나무, 박달나무 등이었고, 사면하부에서 상부로 갈수록 중요치가 증가하는 수종은 신갈나무, 노린재나무 등이었으며 감소하는 수종은 층층나무, 들메나무 등이었다. 해발고가 높아질수록 종수, 종다양도, 균재도는 모두 감소하는 경향을 보였다. 정부를 제외한 해발고대간 유사도지수는 55.3~67.1%, 사면부위별 유사도지수는 36.8~71.7%로써 해발고보다 사면부위에 따른 종구성 상태의 차이가 심한 것으로 나타났다. 수종별 중요치에 의하여 cluster 분석한 결과 계곡하부 사면하부의 졸참나무군집, 계곡하부 사면중ㆍ상부의 신갈나무-졸참나무군집. 계곡중ㆍ상부의 신갈나무-활엽수군집, 계곡정부의 신갈나무-철쭉꽃군집으로 구분되었다.

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저장상대습도(貯藏相對濕度)에 따른 당(糖)과 소금 이상혼합물(二相混合物)의 흡습특성(吸濕特性) (Sorption Characteristics of Binary Mixture of Sugar and Sodium Chloride)

  • 오훈일;김우정;박내정
    • 한국식품과학회지
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    • 제15권1호
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    • pp.19-26
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    • 1983
  • Sucrose 또는 glucose와 NaCl을 혼합비율(混合比率)을 달리하여 RH 46%에서 92%까지 6단계의 상대습도별(相對濕度別)로 $20^{\circ}C$에서 저장(貯藏)하면서, 각(各) 혼합물(混合物)의 흡습특성(吸濕特性)을 조사(調査)한 결과를 요약(要約)하면 다음과 같다. 1. 저장시간(貯藏時間)에 따른 당(糖)과 소금 혼합물(混合物)의 흡습곡선(吸濕曲線)은 초기(初期)의 흡습속도(吸濕速度)가 매우 완만하였으며 RH 65%에서는 흡습량(吸濕量)이 매우 적어 평형(平衡)에 빨리 도달하였으나, RH 73%이상에서는 흡습속도(吸濕速度)가 증가하였을 뿐만 아니라 저장기간이 증가(增加)함에 따라 흡습량(吸濕量)이 계속적으로 증가하였다. 2. 저장시간(貯藏時間)과 흡습속도(吸濕速度)간에는 $log({\frac{ds}{dt}})$ = a log(t)+log(b)의 직선관계식이 성립되었으며, Sucrose와 NaCl혼합물의 경우에는 소금 혼입량(混入量)이 증가(增加)함에 따라 일반적(一般的)으로 slope가 커지는 경향을 보였으나, glucose와 NaCl혼합물(混合物)에서는 일정한 경향을 나타내지 않았다. 3. 당(糖)과 소금혼합물(混合物)의 혼합비율(混合比率) 및 저장기간(貯藏期間)에 따른 흡습수분량(吸濕水分量)은 plateau의 모양을 보였으며, 이 plateau의 양상(樣相)은 혼합물(混合物)의 종류(種類) 및 혼합비율(混合比率) 또는 상대습도(相對濕度)에 따라 각각 상이(相異)하였다. 4. log(1-Aw)와 흡습수분량(吸濕水分量)은 $Aw\;0.73{\sim}0.92$사이에 직선적인 관계가 성립(成立)되었으며, 이때 slope는 혼합물(混合物)의 종류(種類) 및 혼합비율(混合比率)에 따라 상이(相異)하였으나 당(糖)과 NaCl의 혼합비율(混合比率)이 40 : 60일 때 최대(最大)의 slope를 보여 가장 큰 혼합성질(混合性質)을 나타냈다.

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물/극성유기용매 혼합욕에서 폴리에스테르의 염색 (Dyeing Property of Polyester in Byebath Containing Water and Water Miscible Organic Solvents)

  • 김은아;유효선
    • 한국의류학회지
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    • 제22권1호
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    • pp.100-107
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    • 1998
  • Polyester filaments were dyed with disperse dye in dyebath containing water and water miscible organic solvents . acetone, 1,4-dioxane, DMF. In case of Acetone and 1,4-dioxane, the equilibrium dyeuptake was maximun at the volume fraction 0.05. The equilibrium dye uptakes were decreased as volun~e fraction of organic solvents were increased. When the volume fractions of water miscible organic solvents were varied, dye uptake was increased constantly with dyeing time. In dyebath containing water and water miscible organicsolvent, the dyeuptake was increased quickly during initial 40∼ 60 min. and slowly increased there after. The slope of Ct/Coo to t was greater in dyebath containing water and water miscible organic solvents than dyebath containing water. The differences of the slope with volulne fractions of water miscible organic solvent were not shown big.

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측면경사면에서의 목표 타격시 체중이동에 관한 연구 : 오르막경사를 중심으로 (A Study on Weight Transfer Sidehill Slopes during Goal Impact : Especially sidehill Slopes with ball above the feet)

  • 이의린;최지영
    • 한국운동역학회지
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    • 제16권1호
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    • pp.43-53
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    • 2006
  • Among several movements that occurred upon a slope, golf swing is the most typical one because environmental conditions dynamically vary with many kinds of slopes. Some studies on the golf swing were performed about a weight transfer on flatland, however, there couldn't be seen any study about the weight transfer on slope elsewhere. Therefore, the purpose of this study was to provide quantified data to objectively test the coaching words and keys about the weight transfer at sidehill slope during goal impact EspeciaIly sidehill Slopes with ball above the feet. Four highschool golfer, who have average handy 5, were recruited for this study. Plantar pressure distribution and cinematographic data were collected during golf swing in the conditions of flatland, $5^{\circ}$, $10^{\circ}$ and $15^{\circ}$sidehill slope simultaneously. The two data were used to synchronize the two data later. The plantar regions under the foot were divided into 8 regions according to the directly applied pressure pattern of the subject to insole sensor. The 8 foot regions were hullux, medial forefoot, central forefoot, lateral forefoot, medial midfoot, lateral midfoot, medial heel, and lateral heel. And the plantar pressure data was also divided into four movement address, phases-backswing. downswing, and follow-through phases according to the percentage shown to the visual information of film data. Based on the investigations on public golf books and experiences of golfers, it was hypothesized by the authors in the early of this study that the steeper slopes are, the more weight loads on left foot that positions at the higher place. When observing the results of plantar pressure and vertical force curves according to the sidehill slope conditions, the hypothesis could be accepted.

현장 열응답시험과 현장 대수성시험결과를 동시 분석 가능한 통합전산 Program에 관한 연구 (A Study on the Integrated Computer Program for the Multi Analysis of In-Situ Aquifer and Geothermal Response Test)

  • 한정상;한혁상;윤운상
    • 한국지열·수열에너지학회논문집
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    • 제4권1호
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    • pp.11-19
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    • 2008
  • Groundwater flow in confined aquifer and heat transport in underground geologic media are using same governing equation(line source) like well fuction. Therefore the conventional slope method using only later data obtained from in-situ thermal response test to determine the thermal conductivity of vertical geothermal heat exchanger(GHEX) is basically identical with one of Theis straight line method of aquifer test under artesian condition. In case that the pumping rate(Q, $m^3$/d) and drawdown(s,m) which are used for input data of existing hydrogeologic computer programs for aquifer test are replaced and converted to supplying heat energy per unit length of bore hole(Q/L,w/m or Kcal/h.m) and temperatures (T,$^{\circ}C$)measured at in and out-let of GHEX as in put data respectively, thermal conductivity around geothermal heat exchanger can be easily estimated without any special modification of the existing hydrogeologic computer program. Two numbers of time series temperature variation data obtained from in situ geothermal response test are analized using Theismethods(standard curve and straight line method) by using existing aquifer test program and conventional Slope method proposed by ASHRAE. The results show that thermal conductivity values estimated by two straight methods are identical and the difference of estimated values between standard curve methods and Slope method are also within acceptable ranges. In general,the thermal conductivity estimated from Theis straight linemethod gives more accurate value than the one of Slope method due to that Slope method uses only visual matching otherwise Theis method uses automatic curve matching estimation with reducing RSS.

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힘판을 이용한 들기 작업시의 경사면 분석 (Analysis of Sloping Ground When Lifting with Force Platform)

  • 서승록;김종석
    • 한국산업정보학회논문지
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    • 제5권1호
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    • pp.77-86
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    • 2000
  • 최근 들어 산업현장에서는 생산성의 향상, 노무비의 증가 및 노동력의 부족, 안전성 등을 이유로 자동생산시스템과 운반용 동력기계와 같은 기구를 도입하여 작업자 스스로가 자신의 근력을 이용한 인력운반(Manual Materials Handling : MMH) 작업이 줄어들고 있는 추세라고 하지만, 실제로 비탈진 경사면에 위치한 농장이나 과수원, 항만부두의 하역작업, 경사진 벌목장 작업, 광산의 막장에서의 작업등과 같이 주변환경이 복잡한 현장에서의 작업은 기계로 완전히 대체하기가 어려운 실정이다. 그러므로, 이러한 작업현장에서는 인간이 직접 손 운반작업(들기 작업)을 할 수밖에 없으며, 이와 같은 경사면에서의 손 운반작업(들기 작업)은 작업자에게 많은 재해의 위험성을 만들어 주며, 추락으로 인한 산업재해는 물론이고 미끄러짐 방지 같은 신체균형잡기 노력은 근골격 계통에 과도한 무리를 주게 되어 LBP의 원인이 되기도 한다. 하지만, 이러한 경사면에서의 손 운반작업(들기 작업)에 대한 연구에 대해서는 거의 없는 실정이다. 따라서, 본 연구에서는 force platform을 이용하여 경사면에서의 손 운반작업(들기 작업)을 통한 COP변화를 측정 ·분석하여 작업자들의 산업재해를 예방하고자 하며, 향후 이러한 기초 자료를 통하여 손 운반작업(들기 작업)뿐만 아니라 그 밖의 응용분야에 기여하고자 한다.

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