한지형 마늘의 엽초유인 방법에 따른 마늘 엽 생육과 수량 에 미치는 영향을 구명하고자 관행유인, 비닐절개유인, 일시제 거유인 등 3처리를 두어 실험을 실시한 결과, 초장은 생육 초 기 일시제거유인에서 좋았으나, 생육 후기로 갈수록 차이가 없 었으며, 엽초경은 4월 상순까지는 비슷한 생육을 보였으나, 생 육후기로 갈수록 일시제거유인에서 저조하였다. 엽록소 함량 은 비닐 일시제거 유인에서 SPAD값이 46.0~62.5로 변화폭이 컸던 반면, 관행유인은 3.0(SPAD값)으로 변화폭이 적었다. 엽 초유인 방법별 토양온도는 관행 및 비닐절개 유인에서 최고· 최저 온도차가 비닐 일시제거유인에서는 14oC로 온도의 변화 폭이 컸다. 구중은 관행 및 비닐 절개 유인에서 무거웠으며, 1,000당 투하노동력은 비닐절개구와 비닐 일시제거구에서 관 행 66.5시간/2인 대비 각각 17.3%와 18.3%의 점감효과가 있 었고, 1,000당 수량은 비닐절개 유인이 751 kg로 관행유인 686 kg에 비해 9% 증수되었다.

This paper examines whether and how L2 learners’ reading strategies vary depending on the task type or on the measure of eliciting strategy use. Participants were 28 college students in a Korean university. Two reading tasks (i.e., reading for comprehension vs. reading for summarizing) and three measures of strategy use (i.e., pre-reading strategy survey, while-reading think aloud, and post-reading strategy check list) were employed to answer the posed research questions. The researcher’s observation of the participants’ thinking-aloud and a post-task interview were also implemented for data triangulation. All the participants completed two tasks based on two texts (one for each) selected from the same chapter in a book that were considered equivalent in length, readability, and topic. The results revealed that the number of reading strategies reported decreased dramatically in the order of strategy survey, strategy check list, and think aloud. Significantly more frequent use of reading strategy was found in reading for comprehension than in reading for summarizing, large portion of which was devoted to bottom-up style decoding, while in reading for summarizing the students approached the text with more focused attention caring about propositional connections at discourse level. Some other findings are presented along with implications for reading research and for L2 reading instruction.

Amino acid transporters play an important role in supplying organic nutrient to cells. The expression profile of L-type amino acid transporter 1 (LAT1) and its subunit 4F2 heavy chain (4F2hc) on different differentiation stages in 4-NQO induced rat tongue carcinogenesis was examined using immunohistochemical analysis. The gradually increasing LAT1 and 4F2hc expression detected during the multistep progressive change shows that the protein may have an important role i n the multistep tongue c arcinogenesis. Conclusively, LAT1 and 4F2 hc c an b e a useful b iomarker f or a better understanding of multistep tongue carcinogenesis, while the specific inhibition o f LAT1 and 4F2 hc would be a new rationale for suppressing tumor cell growth in tongue cancer.

버즈풋 트레포일의 줄기에서 뿌리를 유도함에 있어, 최적의 유도조건을 확립하고자 배양토 종류별, 복합희토 처리 농도별, IBA 처리 농도별로 뿌리 유도율을 조사하였다. 원예농상토, 마사토, 강모래 등 3종류의 배양토에서 뿌리 유도율을 조사한 결과, 마사토(77.8%), 강모래(70.0%), 원예용 상토(41.1%) 순으로 높게 나타났다. 마사토와 강모래에서 복합희토 용액을 농도별로 처리하여 뿌리 유도율을 조사한 결과, 마사토에서는 복합희토 용액 60 pp

Amino acid transporters play an important role in supplying organic nutrient to cells. The expression of L-type arnino acid transporter 1 (LATl) and its subunit 4F2 heavy chain (4F2hc) was evaluated to deterrnine the alterations to these transporters in oral norrnal mucosa (ONM) , oral precancerous lesion (OPL) and oral squamous cell carcinoma (OSCC). Sections from formalin-ftxed, paraffm-embedded S따nples of ONM, OPL or OSCC were exarnined using immunohistochernical staining to detect LATl and 4F2hc proteins. 까le LATl and 4F강lC expression increased progressively from ONM to hypeφ，Iastic and to dysplastic lesions and OSCC. In partiαlar， LATl rnay be a more S야dftc indicator of tumor prog~않sion than 4F2hc. 까le gradually increasing LA Tl and 4F2hc expression detected during the multistep progressive change shows that the protein rnay have an important role in the early stages of multistep oral carcinogenesis. In addition, the specific inhibition of LA Tl and 4F2hc rnight be a new rationale to suppress oral cancer progression.

The reinforced concrete wall type apartments built before 1988 in Korea, which are rarely seen in other countries, were constructed using tunnel form method for convenience of construction. Tunnel form method, however, do not arrange bearing walls in the direction of long side of the apartment, and this results in little resistance capability against lateral loads in that direction. Consequently, there exists significant collapse possibility due to the formation of plastic hinge at the joints of wall and slab during earthquake. This study experimentally investigates the reinforcement methods using carbon sheet and L-shaped steel which were not seismically designed. The reinforcement method using carbon sheet and L-shaped angle, has following advantages; construction workability, usage of light-weight material, and little requirement for the installation room. The specimen with steel bar fill up using modified epoxy mortar in the mid-span of the slab shows the same stiffness as the standard specimen without reinforcement and the stiffness of the specimen reinforced by carbon sheets without L-shaped steel was increased by only about 13%, implying that those existing methods cannot provide significant reinforcement effects. For the specimens of which wall-slab joints were reinforced using both carbon sheet and L-shaped steel, the increase of stiffness ranges from 43% to 496% and the increase of energy dissipation amount ranges from 120% to 233%. Also it was identified that the linkage method using penetration bolts was more efficient than the one using expansion anchors in increasing stiffness, strength and energy dissipation capacity.

본 연구에서는 현재 일반가정이나 영업소에서 사용중인 액화석유가스 용기용밸브의 문제점을 제시하고, L.P 가스사고를 예방할 수 있는 LPG용 과류밸브의 과류차단장치를 개발제작함에 있어 고압가스 안전관리기준 통합고시 제12장 4절 과류차단형 액화석유가스 용기용밸브에서 규정한 과류차단 성능시험을 실시하는데 필요한 여러 가지 변수를 선정하여 차단장치의 형상에 따른 최적의 차단 유량 범위를 찾고자 실험을 실시하였으며, 보다 궁극적으로는 일반 용기용밸브가 가진 문제점을 조속히 해결하고 진정한 의미의 안전밸브를 개발하는데 목적이 있다.

Carbohydrate and soluble protein reserves and regrowth characteristics in response to cutting height were investigated over four regrowth cycles of turf-type perennial ryegrass(Lolium perenne L. cv. preludeII). When the plants were at the full-vegetative

활주선 선형을 갖는 고속어선의 저항특성을 체계적으로 연구하기 위한 제 1단계로서 단면형상 및 장-폭비와 저항특성과의 관계에 대한 실험적 연구를 수행하였다. 본 연구는 새로운 고속 활주형 어선을 개발하기 위한 초기연구로서 다음의 내용을 포함하고 있다. - 4가지 단면형상에 대한 저항 특성 - 4가지 장-폭비에 대한 저항 특성

(Fe0.98Mn0.02)xSi2(x≤1) 조성으로, 용융법으로 제조한 α-Fe2Si5상의 잉곳을 730~850˚C에서 4~20시간 열처리하거나, 기계적 합금화로 제조한 ε-FeSi과 Si상으로 구성된 분말을 760~850˚C에서 10분간 가압통전소결하므로써 β-FeSi2기지상에 Si이 분산된 미세조직을 얻을 수 있었다. 조성, 열처리 온도와 소결 온도에 따라 Si 분상의 크기와 간격이 각기 0.05~0.27μm와 0.2~0.6μm 범위에서 변화하였다. 이와 같은 Si 분산상에 의해 β-FeSi2의 격자 열전도도가 감소되어 성능지수가 향상될 수 있을 것으로 기대된다.

여름철 고온기 참외재배시 환기방법에 따른 시설내 온도차이가 참외의 생육 및 품질에 미치는 영향을 구명하고자 측면환기공 환기구(Type 1), 측면환기공 환가+천정 환기공 환기구(Type 2) 및 권취식 환기구(Type 3)로 구분하여 시험을 실시한 결과를 요약하면 다음과 같다. 1. 환기방법별 온도의 하강효과는 Type 3이 가장 좋았고 Type 2, Type 1의 순으로 나타났다. 2. 환기방법에 따른 온도분포는 측면환기공만 있는 Type 1과 천정환기통 및 측면환기공이 있는 Type 2의 경우 환기공 및 환기통의 면적이 적어 중력환기 및 풍력환기가 미세하여 온도가 상승하였다. Type 3은 측면환기 면적이 넓어 풍력환기에 의한 공기의 유입, 유출이 쉬워 온도분포가 비교적 균일하였다. 3. 실측치를 이용하여 내외기온차이에 의한 환기량을 추정한 결과, Type 3이 Type 1 및 Type 2보다도 많음을 알 수 있었다. 4. 생육 및 상품성을 조사한 결과, Type 3이 Type 2, Type 1보다도 엽수 및 엽면적이 증가하여 생육이 양호하였고 과중, 과육두께, 기형과율, 상품과율 등 상품성도 우수하였다. 5. 수확시기별 상품수량은 각처리 공히 수확초기 보다는 후기로 갈수록 증가하였다. 특히 Type 3에서 뚜렷한 경향을 보였다.

Recently, in Seoul there is a growing interest in the L type gutter between the street and the sidewalk because the broken gutter spoils the appearance of the city. The gutter has been viewed as an unimportant attached facility of the road despite an important drainage facility. Also, the gutter lost function by various deterioration actions is becoming hideous objects of streets. Accordingly, many engineers recognized problems about the gutter and tried to seek for solution. In this study, we desired to confirm that the inside of the gutter concrete was not deteriorated even if the surface of the gutter concrete was deteriorated by the de-icing salts. We could obtain thirty core specimens deteriorated by de-icing salts in Seongbuk-gu which is old downtown, has many hills such as Arirang-Hill, Miari-Hill, etc. in Seoul and test compressive strength. It was confirmed that the compressive strength of the gutter concrete follows normal distribution and it is statistically significant 1% level that the population mean of the compressive strength of the gutter concrete is more than 18MPa.

This study carried out field test construction by slip-form method with on site concrete batch, The results show that slip form method is good at the Quality assurance and constructability of L tyoe curbs and gutters but it is difficult for Quality control.

‘Muhan’ (Hordeum vulgare L.), a new ruminant-palatability forage barley cultivar, was developed by the breeding team at the Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA in 2013. It was derived from the cross between SB921011-3B-16-2/IT0188556 and ‘Suwon 365’. Among the cross made in 2002, a promising line, SB02T2097-B-B-B-18, showed good characteristics in potential forage yield in the yield trial tested at Iksan in 2009 to 2010 designated as Iksan 465. The line in the Regional Yield Trials(RYT) tested in eight locations around Korea for three years from 2011 to 2013, and was released as the name of ‘Muhan’. It has the growth habit of group Ⅳ, erect plant type, green leaf and awnless spike. Its average heading and maturing dates were on May 4, and June 4, respectively, with similar to check cultivar ‘Youngyang’. The cultivar had 102cm of culm length, 711 spikes per m2 and it showed better rate of leaf, winter hardiness, and resistance to BaYMV than those of the check cultivar. The average forage yield of ‘Muhan’ was about 12.4 ton ha-1 in dry matter in paddy field. ‘Muhan’ also showed 6.6% of crude protein content, 28.6% of ADF (Acid Detergent Fiber), 50.1% of NDF (Neutral Detergent Fiber), and 66.3% of TDN (Total Digestible Nutrients), including higher grade of silage quality for whole crop barley

‘Jungmo2506’ (Hordeum vulgare L.), a new ruminant-palatability forage barley cultivar, was developed by the breeding team at the Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA in 2013. It was derived from the cross between ‘Sunwoo’ and ‘Milyang 34’. Among the cross made in 2002, a promising line, SB02T2020-B-BB- 64, showed good characteristics in potential forage yield in the yield trial tested at Iksan in 2009 to 2010 designated as Iksan 463. The line in the Regional Yield Trials(RYT) tested in eight locations around Korea for three years from 2011 to 2013, and was released as the name of ‘Jungmo2506’. It has the growth habit of group Ⅳ, erect plant type, green leaf and short awn spike. Its average heading and maturing dates were on May 3, and June 2, respectively, with similar to check cultivar ‘Youngyang’. The cultivar had 99cm of culm length, 692 spikes per m2 and it showed better rate of leaf, winter hardiness, and resistance to BaYMV than those of the check cultivar. The average forage yield of ‘Jungmo2506’ was about 11.8 ton ha-1 in dry matter in paddy field. ‘Jungmo2506’ also showed 6.6% of crude protein content, 27.4% of ADF (Acid Detergent Fiber), 49.2% of NDF (Neutral Detergent Fiber), and 67.2% of TDN (Total Digestible Nutrients), including higher grade of silage quality for whole crop barley.