• 한국버섯학회지
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• 제4권4호
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• pp.129-134
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• 2006

큰느타리버섯의 객관적인 품질기준을 마련하기 위하여 유통형태별로 자실체를 수집하여 통계적으로 본 연구실의 기준과 비교분석하고, 등급별 품질기준을 제시하였다. 즉, 키의 경우 특품(특대)120~130, 상품(대)110~120미만, 중품(중)80~110미만, 하품(소)80mm 미만으로 두었고, 대두께는 품질별로 특품(특대)40~45, 상품(대)30~40미만, 중품(중)25~30미만, 하품(소) 25mm미만으로 정하였다. 갓직경은 절대적인 수치보다 대두께와의 비례에 의해 품질이 정해지므로 구체적인 수치를 없애는 대신 비율을 적시하였다. 특품(특대)은 갓직경/대두께의 비율이 1.6이하, 상품(대)은 1.7이하로 두었다. 무게는 특품(특대)이 95~120, 상품(대)70~95미만, 중품(중)50~70미만, 하품(소)50g미만으로 설정하였다.

• 지질공학
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• 제24권3호
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• pp.333-341
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• 2014

The construction of roads, tunnels, and bridges results in changes to the local terrain that may influence the ground safety factor, which represents the stability of geotechnical structures. In this study, we assessed construction sites that had collapsed as a result of terrain change, and then simulated variation in the ground safety factor with respect to terrain change caused by road construction. We assumed steep slopes to simulate changes in terrain in a mountainous area and assumed that earthworks took place for road construction by cutting a platform into the slope and altering the slope angle of the terrain both above and below the road. We calculated values of the ground safety factor through a stability analysis of the slope both above and below the road, and examined the variation in the safety factor of the above- and below-road slopes with respect to changes in road width. We found that if the slope angle was the same above and below the road, then the change in the ground safety factor during/after road construction occurred in the slope below the road, and if the slope angle above the road differed from that below, then the change occurred in both the above- and below-road slopes. Furthermore, the ground safety factor was essentially constant for road widths exceeding 2-6 m, depending on both above- and below-road slope angle. The findings of this study can be used to guide the management of construction sites and to assess changes in ground stability during road construction work, particularly in the early stages of earthworks, when the road width is narrow.

• The Journal of Korean Physical Therapy
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• 제15권3호
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• pp.166-172
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• 2003

The aim of this study is to present the basic reference data of age and specific gait parameters for comparisons of the gait characteristics depended on amputation length of the Unilateral Trans-Tibial Prostheses. The basic gait parameters were extracted from 10 Adult, and 20 below knee(B/K) patients, 50 to 60 years of age using VICON 512 Motion Analyzer. The results were as follows; 1. The mean Cadence of the above knee(A/K) patients and below knee(B/K) patients were $87.77{\pm}8.64$ steps/min, to $99.84{\pm}11.14$ steps/min.(p<0.05) 2. The mean Walking Speed of the above knee(A/K) patients and below knee(B/K) patients were $0.84{\pm}0.15$ m/s, to $0.96{\pm}0.25$ m/s.(p>0.05) 3. The mean Stride Length of the above knee(A/K) patients and below knee(B/K) patients were $1.14{\pm}0.14\;m$, to $1.14{\pm}0.22m$.(p>0.05) 4. The mean maximal angles of joint on the hip flexion motion for different above knee(A/K) patients and below knee(B/K) patients were $34.75{\pm}10.18_{\circ}$, to $32.32{\pm}6.34_{\circ}$.(p>0.05) 5. The mean maximal angles of joint on the knee flexion motion for different above knee(A/K) patients and below knee(B/K) patients were $66.97{\pm}15.08_{\circ}$, to $52.65{\pm}9.21_{\circ}$. (p<0.05) 6. The mean maximal angles of joint on the ankle dorsi-flexion motion for different above knee(A/K) patients and below knee(B/K) patients were $14.41{\pm}4.82_{\circ}$, to $10.04{\pm}3.49_{\circ}$.(p>0.05) 7. The mean maximal angles of joint on the ankle plantar-flexion motion for different above knee(A/K) patients and below knee(B/K) patients were $5.77{\pm}3.17_{\circ}$, to $2.75{\pm}4.49_{\circ}$.(p>0.05)

• The Journal of Korean Physical Therapy
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• 제16권2호
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• pp.108-115
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• 2004

The aim of this study is to present the basic reference data of age and specipic gait parameters for comparisons of the gait characteristics depended on Unilateral Trans-Femoral or Trans-Tibial Prostheses. The basic gait parameters were extracted from 10 Adult, 10 above knee(A/K) patients and 10 below knee(B/K) patients, 50 to 60 years of age using VICON 512 Motion Analyzer. The results were as follows; 1) The mean Cadence of the above knee(A/K) patients and below knee(B/K) patients were $87.77{\pm}8.64$ steps/min, to $99.84{\pm}11.14$ steps/min.(p<0.05) 2) The mean Walking Speed of the above knee(A/K) patients and below knee(B/K) patients were $0.84{\pm}0.15$ m/s, to $0.96{\pm}0.25$ m/s.(p>0.05) 3) The mean Stride Length of the above knee(A/K) patients and below knee(B/K) patients were $1.14{\pm}0.14$ m, to $1.14{\pm}0.22$m.(p>0.05) 4) The mean maximal angles of joint on the hip flexion motion for different above knee(A/K) patients and below knee(B/K) patients were $34.75{\pm}10.18_{\circ}$, to $32.32{\pm}6.34_{\circ}$ .(p>0.05) 5) The mean maximal angles of joint on the knee flexion motion for different above knee(A/K) patients and below knee(B/K) patients were $66.97{\pm}15.08_{\circ}$, to $52.65{\pm}9.21_{\circ}$ .(p<0.05) 6) The mean maximal angles of joint on the ankle dorsiflexion motion for different above knee(A/K) patients and below knee(B/K) patients were $14.41{\pm}4.82_{\circ}$, to $10.04{\pm}3.49_{\circ}$ .(p>0.05) 7) The mean maximal angles of joint on the ankle plantarflexion motion for different above knee(A/K) patients and below knee(B/K) patients were $5.77{\pm}3.17_{\circ}$, to $2.75{\pm}4.49_{\circ}$ .(p>0.05)

• 한국사회정책
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• 제24권4호
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• pp.31-62
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• 2017

본 연구는 2014년 주거실태조사를 활용하여 최저주거기준의 각 하위기준미달, 주거비과부담, 중복주거빈곤의 주거빈곤유형에 따라 인구사회경제적 특성과 주거욕구에 있어 차이가 있는지를 살펴본 후, 주거빈곤과 관련 있다고 알려진 개별 특성이 다른 특성을 통제한 상태에서도 유형별 주거빈곤에 유의미한 영향을 미치는지를 다항 로짓 분석으로 확인하였다. 분석결과 중복주거빈곤가구, 시설기준미달가구, 소득이 낮은 주거비과부담가구, 구조성능환경기준미달가구, 면적기준미달가구, 방수기준미달가구의 순으로 정책적 우선순위를 설정하여야 할 것으로 나타났다. 또 유형별 주거빈곤가구와 관련된 요인이 다소 상이함을 확인하였다. 이를 바탕으로 중복주거빈곤가구에 대한 우선 지원, 임대시장에 대한 규제, 주거비과부담가구의 경우 소득수준에 따라 다른 정책, 장애가구를 위한 지원 등의 주거복지 정책적 함의를 제시하였다.

• The Korean Journal of Ecology
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• 제13권1호
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• pp.9-18
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• 1990

For reaserching the factors of plants micro-distribution, accumulation of 5 minerals-total-nitrogen, phosphorus, potassium, sodium and calcium-for 19 plant species was investigated in reclaimed land, in western coast of Korea, In the five minerals, sodium contents were quite different among the species. Plant species were divided into 4 groups based on the sodium accumulation and accumulation site in plant tissue: Na accumultion type above-ground part>below-ground part : Triglochin maritimum, Chenopodium virgatum, Atriplex subcordata, Salicornia herbacea, Suaeda japonica, suaeda asparagoides, Limonium tetragonum, Aster tripolium, Artemisia scoparia, Sonchus brachyotus above-ground partbelow-ground part : Zoysia sinica, amagrostis epigeiosa bove-ground part

• 한국재료학회지
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• 제20권5호
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• pp.271-277
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• 2010

In this paper two aspects of the percolation and conductivity of carbon black-filled polyethylene matrix composites will be discussed. Firstly, the percolation behavior, the critical exponent of conductivity of these composites, are discussed based on studying the whole change of resistivity, the relationship between frequency and relative permittivity or ac conductivity. There are two transitions of resistivity for carbon black filling. Below the first transition, resistivity shows an ohmic behavior and its value is almost the same as that of the matrix. Between the first and second transition, the change in resistivity is very sharp, and a non-ohmic electric field dependence of current has been observed. Secondly, the electrical conduction property of the carbon black-filled polyethylene matrix composites below the percolation threshold is discussed with the hopping conduction model. This study investigates the electrical conduction property of the composites below the percolation threshold based on the frequency dependence of conductivity in the range of 20 Hz to 1 MHz. There are two components for the observed ac loss current. One is independent of frequency that becomes prevalent in low frequencies just below the percolation threshold and under a high electrical field. The other is proportional to the frequency of the applied ac voltage in high frequencies and its origin is not clear. These results support the conclusion that the electrical conduction mechanism below the percolation threshold is tunneling.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제26권1호
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• pp.29-50
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• 2012

이 연구의 목적은 우수학력 학생들과 기초학력 미달 학생들의 수학과 학업성취도를 비교하는 데 있다. 이러한 연구 목적을 수행하기 위해 이 연구에서는 학교급별로 우수학력과 기초학력 미달 학생들의 비율, 우수학력과 기초학력 미달 학생들의 전체, 내용 영역별, 행동 영역별 수학 학업성취도를 비교하였다. 이를 통해 우수학력과 기초학력 미달 학생들의 변화 추이를 파악할 수 있을 뿐만 아니라 내용 영역별, 행동 영역별, 문항 유형별(서답형 문항)로 우수학력과 기초학력 미달 학생들의 특성을 파악할 수 있었다.

• Imaging Science in Dentistry
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• 제36권3호
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• pp.137-143
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• 2006

Purpose : To evaluate location, distribution, diameter, and length of the nutrient canals on mandibular anterior region using a cone beam computed tomography (CBCT). Materials and Methods : Mandibular CBCT was performed on 33 adults (18 males and 15 females) with no history of systemic disease, and any other dental surgery history Location, distribution, diameter, and length of the nutrient canals on mandibular anterior region were radiographically evaluated. A statistical comparison was done by SPSS. Results : In the location and distribution of nutrient canals, they were found in 6.8% at labial portion above root apex, in 93.28% at lingual portion above root apex in 46.2% at labial portion below root apex, and in 53.6% at lingual portion below root apex. Nutrient canals at lingual portion above root apex were most frequently observed between central and lateral incisors, and those at labial and lingual portion below root apex were most frequently observed between central incisors. The mean diameters of nutrient canals were 0.54 mm at labial portion above root apex, 0.61 mm at lingual portion above root apex, 0.66 mm at labial portion below root apex, and 0.76 mm at lingual portion below root apex. The mean lengths of nutrient canals were 2.63 mm at labial portion above root apex, 3.74 mm at lingual portion above root apex, 4.51 mm at labial portion below root apex, and 6.77 mm at lingual portion below root apex. Conclusion : CBCT is useful device to evaluate the anatomical structure of nutrient canals on mandibular anterior region.

• 한국전자통신학회논문지
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• 제7권1호
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• pp.125-134
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• 2012

본 연구는 대기중에 포함된 미세먼지(PM10: 지름 $10{\mu}m$ 이하크기의 미세먼지)가 위성신호전송주파수대역에 미치는 영향을 해석하기 위한 것으로, 미세먼지 농도별 위성신호감쇠 정도를 해석을 위하여 $50{\mu}g/m^3$이하, $100{\mu}g/m^3$이하, $200{\mu}g/m^3$, $400{\mu}g/m^3$이하, $800{\mu}g/m^3$이하, $1,600{\mu}g/m^3$이하, $3,200{\mu}g/m^3$이하로 총 7단계로 분류하여 해당 농도가 위성신호에 미치는 영향을 정량화 하는 연구이다.