• 한국환경복원기술학회지
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• 제21권4호
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• pp.43-63
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• 2018

The purpose of this study is to investigate and analyze the vascular plants in the Baekdudaegan Mountains and to provide the basic data necessary for future ecosystem conservation measures. The numbers of vascular plants were summarized as 699 taxa including 98 families, 338 genera, 598 species, 4 subspecies, 80 varieties, and 17 forms. There were 427 taxa in A-section, 451 taxa in B-section, 361 taxa in C-section, and 455 taxa in D-section. The rare plants were 37 taxa including 2 taxa of the CR, EN, and DD each, 12 taxa of the VU, and 19 taxa of the LC. The Korean endemic plants were 30 taxa including Salix koriyanagi Kimura, Hanabusaya asiatica (Nakai) Nakai, Carex okamotoi Ohwi, and so forth. The northern plants were 41 taxa including Equisetum hyemale L., Anemone reflexa Steph. et Willd., Symplocarpus renifolius Schott ex Miq., and so forth. The naturalized plants were 33 taxa including Fallopia dumetorum (L.) Holub, Coreopsis lanceolata L., Poa pratensis L., and so forth. The invasive alien plants were 3 taxa including Rumex acetocella L., Ambrosia artemisiifolia L., and Aster pilosus Willd.

• 대한가정학회지
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• 제20권4호
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• pp.1-12
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• 1982

This study was to investigate the changes of shape of the lower limb surface, the rate of the measurement of expansion and contraction and correlation coefficient between variables caused by hip joint and knee joint movements. The results of the investigation are as follows; 1. According to the development figure of shell when the leg was raised $45^{\circ}$forward($M_{2}$), total length of F.L shortened while B.L lengthened. This result is contarary to $M_{3}$raising the leg $15^{\circ}$ backward. In both $M_{2}$, $M_{3}$movements, the rate of expansion and contraction to the course direction was insignificant. When hip joint was bent $15^{\circ}$ with knee joint $120^{\circ}$bent ($M_{4}$) and hip joint was bent $30^{\circ}$ with knee joint $90^{\circ}$ bent($M_{5}$), upper section of back hip expanded while the front hip section contracted slightly. In the Movement of sitting on the chair($M_{6}$), abdomen, front hip section and upper thight section contracted to the wale direction remarkably while the back hip section expanded conspicuously. 2. According to the rate of expansion and contraction of skin (surface) by the somatometry. In $M_{2}$, C.F.L. upper and middle thight girth contracted and B.L, C.L, L.L expanded. This fact is contarary to M3. In M4, M5, C.F.L showed remarkable contraction and C.B.L expanded remarkably. In $M_{6}$, C.B.L contracted most of all the items measured and knee girth, F.L, L.L, C.B.L, hip girth expanded conspicuously. 3. According to the correlation coefficient between variables. In various movements, the correlation among girth items commonly showed a high or middle grade, the correlation among length items also commonly showed a low grade and that girth and length items showed a very low grade commonly. Waist girth, hip grith, F.L, B.L, L.L items showed that there were significant correlation.

• 대한수학회보
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• 제21권2호
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• pp.127-135
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• 1984

In this paper, we find the Fourier series of X(t, .omega.).mem. $L^{2}$$_{s.a.p.}$ and the Parseval relation of X(t, .omega.).mem. $L^{2}$$_{s.a.p.}$. In section 2, we investigate some basic properties of X(t, .omega.).mem. $L^{2}$$_{s.a.p.}$ In section 3, we show that the mean of X(t, .omega.).mem. $L^{2}$$_{s.a.p.}$ exists and in section 4, after showing the existence of Fourier exponents and Fourier coefficients of X(t, .omega.).mem. $L^{2}$$_{s.a.p.}$. we give the Parseval relation of X(t, .omega.).mem. $L^{2}$$_{s.a.p.}$. For convenience we will denote X(t, .omega.) as X(t) in what follows.hat follows.

• 한국ITS학회 논문지
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• 제9권5호
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• pp.67-71
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• 2010

본 논문에서는 L-형 회로구조에 기반한 새로운 이중대역 임피던스 변환기를 제안한다. 제안된 회로는 전원 또는 부하단에 하나의 스터브 선로가 부착된 전송선로를 사용하여 구성된다. 각 회로 구조와 부하조건에 대해 이중대역 동작조건을 자세히 분석하였으며 이로부터 선로의 길이와 임피던스 등의 이중대역 설계 공식을 간단한 형태로 유도하였다. 제안된 방법을 이용하여 이중대역 임피던스 정합회로를 설계하고 마이크로스트립 회로로 제작, 측정하여 이중대역 동작을 확인하였다.

• 한국압력기기공학회 논문집
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• 제17권2호
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• pp.126-136
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• 2021

During operation of nuclear power plants, the fatigue assessment should be conducted repeatedly, considering changes of operating environments. For the case that cumulative usage factors (CUFs) may exceed the acceptance limit, flaw tolerance evaluation can be an alternative method to meet the regulatory requirements. In this respect, this paper analyzes the effects of the input variables for flaw tolerance evaluation based on ASME BPVC Section XI Appendix L. The reference analysis is performed for the example problem in NUREG/CR-6934. Then effects of the crack orientation, stress intensity factor solutions, thermal stress profiles, fatigue stress decomposition and fatigue crack growth curves are considered for the sensitivity analysis. The results show that the stress analysis considering the actual environment plays a crucial role in flaw tolerance evaluation.

• 한방재활의학과학회지
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• 제21권4호
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• pp.111-118
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• 2011

Objectives: This study was designed to correlation between the axial section area in psoas major muscles and uncleus discharge pat of HIVD(herniated intervertebral disc) of lumbar(L)-spine. Methods: We measured the axial section area in psoas muscles. Then through the medical charts, we investigated nucleus discharge pat of HIVD of L-spine. We analyzed the relationship between them. Results: There was no significant correlation nucleus discharge part and psoas major muscle's axial section area. There was significant correlation aging and psoas major muscle's axial section area with control the sex. Conclusions: According to above results, there was no significant the area of axial section in psoas major muscles and nucleus discharge part of HIVD of L-spine.

• 식물분류학회지
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• 제37권1호
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• pp.1-15
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• 2007

제비꽃속 42집단에 대한 계통 유연관계를 알아보기 위하여 엽록체 DNA의 matK 유전자와 atpB-rbcL intergenic spacer 지역에 대한 염기서열을 분석하였다. MatK 분석에서는 노랑제비꽃절과 장백제비꽃절이 독립된 clade를 형성하였으며, 진정제비꽃절의 5개 아절은 paraphyletic하게 분리되었다. AtpB-rbcL 분석에서는 노랑제비꽃절이 단계통을 형성하였지만, 장백제비꽃절은 잔털제비꽃을 제외한 제비꽃아절 분류군들이 포함되어 있는 clade의자매군을 형성하였고, 진정제비꽃절은 paraphyletic한 분계조로 분리되어, matK 유전자와는 장백제비꽃절과 잔털제비꽃의 위치에 차이를 보였다. 두 가지 유전자의 염기서열 자료를 유합하여 분석한 결과는 제비꽃속 분류군들이 크게 3개의 분계조로 유집되는 것으로 나타났다. 즉, 기본염색체 수가 x=6인 노랑제비꽃절과 장백제비꽃절은 아욱제비꽃아절과 낚시제비꽃아절(x=10)에 속하는 분류군들이 포함된 clade의 자매군을 형성하면서 분리되었고, 잔털제비꽃은 진정제비꽃절의 콩제비꽃아절과 고깔제비꽃아절(x=10 또는 12)의 분류군들과 함께 분계조를 이루었으며, 잔털제비꽃을 제외한 제비꽃아절 (x=12)의 19개 집단도 하나의 clade를 형성하였다. 그러나 outgroup으로 부터 clade 각각의 기원에 대해서는 선행된 ITS와 trnL-F 지역에 의한 결과와는 일치하지 않는 것으로 나타났다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2003년도 The 8th Asian Symposium on Precision Forging ASPF
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• pp.36-39
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• 2003

Due to the strength and biocompatibility requirement, the stainless steel SUS 316L is widely used for trauma internal fixation device. SUS 316L can be hardened and strengthened only by cold work. In this work, the material compression test is performed both in laboratory and computer simulation by a FEM analysis software DEFORM to correlate the hardness to strain. This data is then used for preform design and predict the hardness of the finish bone plate forging. Finally, we compared the hardness between the actual forging and computer analysis results. Although the predicted hardness from computer simulation. is 55HV higher than the final forging sample, we can get good compatibility on the hardening tendency of cold forging.

• 한국강구조학회 논문집
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• 제25권2호
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• pp.209-222
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• 2013

800MPa급 강재와 100MPa급 콘크리트를 적용한 매입형 합성기둥에 대하여 편심압축실험을 수행하였다. 강재단면의 모멘트팔길이와 변형(응력)을 증가시켜 고강도강재의 성능활용을 극대화할 수 있도록, ㄱ형 강재단면을 네 모서리에 집중 배치한 후, 래티스철근, 링크철근, 띠판을 이용하여 일체화하였다. 이 경우 강재단면의 강력한 횡구속효과로 인해 심부콘크리트의 성능도 개선된다. 실험결과 ㄱ형 강재 매입형 기둥은 H형 강재 매입형 기둥에 비하여 최대강도와 유효휨강성이 1.4배 이상 증가하였다.

• Journal of Plant Biotechnology
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• 제3권2호
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• pp.95-100
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• 2001

To select the section with shoot formation ability, the calli and shoot formation from three sections (first leaf including cotyledonary node, hypocotyl and cotyledon explants) of 5-days-seedlings of soybean were induced on MS medium supplemented with 1.0 mg/L BAP, 3% sucrose, and 0.3% gelrite for one month. The first leaf section exhibited the highest shoot formation rate (51%), followed the hypocotyl section (10%) and the cotyledon section (0%). The shoot formation rates and shoot number of the four excised sections (whole first leaf, a half of the first leaf, a third of the first leaf and only node) of the first leaf were also investigated on the same medium. A half of the first leaf explant and the third of the first leaf explant had higher shoot formation rates (76-80%) and numbers (3-4 / explants) than those in other two explants. Effects of six cytokinins (kinetin, zeatin, BAP, 2iP, PBA, and TDZ) on shoot formation were determined, using the half of the first leaf explants. Zeatin (1.0 mg/L) exhibited the highest in shoot formation rate (94%) and numbers (8 / explant). In addition, the combined effects of three cytokinins (zeatin, BAP, and TDZ; 0.5, 1.0, 2.0 mg/L, respectively) and an auxin (IAA; 0.0, 0.5, 1.0, 2.0 mg/L) were determined. The combination (1:1, v/v) of zeatin (1.0 mg/L) and IAA (1.0 mg/L) exhibited the highest in shoot formation rate (96%) and numbers (16 / explant), twice more than zeatin (1.0 mg/L) alone. The shoot cuttings were transferred and cultivated on the rooting media supplemented with only auxin, IBA at various concentrations. The highest root formation (8 / shoot) was achieved on the medium supplemented with 1.5 mg/L. After 4 weeks of cultivation, the plantlets with an extensive root system were transplanted in pots with a soil mixture of vermiculite and fine sand. Transferred to field, about 75% of the plantlets survived.