가축분뇨의 처리형태와 시용수준이 영년초지의 생산성, 지력중진 및 환경에 미치는 영향

육완방(W.B. Yook) 한국초지조사료학회 2003 한국초지조사료학회지 Vol.23 No.3

GER 유체를 이용한 ER Brake System의 설계 및 속도 제어

육지용(Yook, J.Y.),최승복(Choi, S.B.),육운수(Yook, W.S.) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.4

This paper presents robust control performance of a direct current(DC) motor with brake system adopting a giant electrorheological(GER) fluid, whose distinguished feature is an extremely high value of yield stress. As a first step, Bingham characteristics of the GER fluid is experimentally investigated using the Couette type electroviscometer. A cylindrical type of ER brake is then devised based on the Bingham model, and its braking torque is evaluated. Structural analysis of ER break is performed using ANSYS. After formulating the governing equation of motion for the DC motor with ER brake system, a sliding mode control algorithm, which is very robust to external disturbances and parameter uncertainties, is synthesized and experimentally realized in order to achieve desired rotational speed trajectories. The tracking responses of the control system are then evaluated and verified by presenting speed control performance.

길항세균과 토양전염성 사상균이 목초의 유식물 생육에 미치는 영향

최기춘(K . C . Choi),윤창(C . Youn),안승현(S . H . An),육완방(W . B . Yook) 한국낙농학회 1999 韓國酪農學會誌 Vol.21 No.1

N/A N/A

제주도 자생 두과식물의 분포 , 현존량 및 사료가치 평가

조남기,강영길,육완방,김보현 한국축산학회 1998 한국축산학회지 Vol.40 No.6

The distribution, standing crop, and quality of legumes growing naturally throughout Cheju Island in July 1997 to June 1998 were investigated to select potential forage legumes adapted to this region. Among the 84 leguminous species in the island, 52 species were native and 32 naturalized or cultivated. Sixty-four species were herbaceous while 20 woody. Fifty-three species were perennials. 20 annuals and 11 biennials. Of the 84 species, 20 species were herbaceous vines and 2 woody vines. twelve. 61. 49, 24, 10, 4, and 1 species were distributed at below 50, 50 to 350, 350 to 750, 750 to 1100, 1100 to 1400, 1400 to 1800, and 1800 to 1950 m altitude, respectively. Cassia mimosoides var. nomame. Lespedeza cuneata, Lespedeza maximowiczii, Pueraria thunbergiana, and Trifolium repens were distributed from ea shore to 1.800 m altitude. Twelve, 20, 18, 17, l4, 2 and 1 species bloomed in April, May. June, July, August, September and October. respectively. High frequency species were Cassia mimosoides var. nomame, Dunbaria villosa, Glycine max, Kummerowia striala, Lotus comiculatus var. japonicus, Lespedeza cuneata, Lespedeza maximowiczii, and Pueraria thunbergiana while low were Canavalia lineata, Trifolium lupinaster var. alpinum, , Astragalus adsurgens, and Astragalus adsurgens var. alpinus. The species with production rate of 3.250 to 3,585㎏/10a of standing crop were Astragalus adsurgens, Astragalus membranaceus var. alpinus. Canavalia lineata, Lespedeza cuneata, Lespedeza maximowiczii. Pueraria thunbergiana, Vicia pseudo-orobus. Species with over 17% crude protein content were Desmodium oldhami, Kummerowia striates, Vicia amoena. Vieia angustifolia var. minor, Vicia nipponica, Vicia pseudo-orobus, Vicia angustifolia var. segetillis, and Vicia tetrasperma The species producing higher standing crop with over 15% crude protein content included Astragalus adsurgens, Astragalus adsurgens var. alpinus. Astragalus membranaceus var. alpinus, Canavalia lineata, Cassia mimosoides var. nomame and Vicia pseudo-orobus.

Effects of Antagonistic Bacteria and Soil-Borne Pathogenic Fungi on Growth of Pasture Plants Seedlings

Choi, K. C 韓國酪農學會 1999 韓國酪農學會誌 Vol.21 No.1

Quantifying herbicide dose-response and resistance in <i>Echinochloa</i> spp. by measuring root length in growth pouches

Zhang, C. J.,Lim, S. H.,Kim, J. W.,Song, J. S.,Yook, M. J.,Nah, G.,Valverde, B. E.,Kim, D. S. Canadian Science Publishing 2015 Canadian journal of plant science. Revue canadienn Vol.95 No.6

<P> Zhang, C. J., Lim, S. H., Kim, J. W., Song, J. S., Yook, M. J., Nah, G., Valverde, N. E. and Kim, D. S. 2015. Quantifying herbicide dose-response and resistance in Echinochloa spp. by measuring root length in growth pouches. Can. J. Plant Sci. 95: 1181-1192. The aim of the presented study was to develop a bioassay for rapid diagnosis of herbicide dose-response and resistance in Echinochloa. Pre-germinated seeds of Echinochloa spp. were incubated in growth pouches (18 cm×16.5 cm) containing herbicide solutions in a range of concentrations. Shoot and root lengths were measured after 6 d of incubation. Dose-responses estimated by measuring root lengths in the growth pouches were well-described by the log-logistic dose-response model and similar to those estimated by a whole-plant assay. Accurate dose-response curves were successfully generated for several herbicides with different modes of action, suggesting that the growth pouch method can be used for herbicide bioassays. The suitability of the growth pouch method for rapid diagnosis of acetyl coenzyme-A carboxylase (ACCase) and acetolactate synthase (ALS) inhibitor resistance in Echinochloa spp. was also tested. For cyhalofop-butyl, resistant and susceptible biotypes were discriminated at 180-300 mg a.i. L<SUP>−1</SUP> and 80-120 mg a.i. L<SUP>−1</SUP> for barnyardgrass (E. crus-galli) and late watergrass (E. oryzicola), respectively. For penoxsulam, the discriminatory dosage was 350-500 mg a.i. L<SUP>−1</SUP> for barnyardgrass and 650-1000 mg a.i. L<SUP>−1</SUP> for late watergrass. The method was further used to identify late watergrass biotypes resistant and susceptible to two other ALS inhibitors, azimsulfuron and bispyribac-sodium. Our results show that the growth pouch method can be reliably used in herbicide dose-response studies and to diagnose herbicide resistance in Echinochloa spp., with significant time and cost savings compared with conventional whole-plant assays. </P>

Dynamic Mechanical Properties of a Dual-Phase Zr28Y28Al22Co22 Metallic Glass

H. T. Jeong,W. Yook,B. J. Kim,김원태,김도향 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.4

In order to investigate the mechanical relaxation behaviors of a Zr28Y28Al22Co22 phase separating metallic glass, dynamic mechanical measurements of the tensile storage and loss moduli were performed for broad temperature and frequency ranges. The glass transition of each separated phase in the as-spun ribbon was manifested by the double decreasing of the storage modulus and two loss modulus peaks. The master curves for tanδ of the as-spun and heat-treated specimens were constructed according to the time-temperature superposition principle. From the temperature dependence of the shift factor, the activation energies for the primary and secondary relaxation of both specimens were calculated and the effects of the interconnected structure of the dual-phase as-spun ribbon and partially crystallized ribbon on the mechanical relaxation behaviors were studied.

CT gastrography for volumetric measurement of remnant stomach after distal gastrectomy: a feasibility study

Huh, J.,Lee, I. S.,Kim, K. W.,Park, J.,Kim, A. Y.,Lee, J. S.,Yook, J. H.,Kim, B. S. Springer Science + Business Media 2016 Abdominal radiology Vol.41 No.10

<P>To evaluate the feasibility of post-operative CT gastrography for volumetry of the remnant stomach in gastric cancer patients treated with distal gastrectomy. CT gastrography was performed with oral administration of effervescent granules in 35 gastric cancer patients who underwent distal gastrectomy. Two readers independently rated the degree of gastric distension on a four-point scale, one (near-total collapse) to four (well distended) and measured the volume of remnant stomach using either 3D or 2D volumetry. The inter-volumetry agreements between the 2D and 3D methods and the interobserver agreements between readers 1 and 2 were assessed by intraclass correlation coefficients (ICCs) and Bland-Altman plots. The mean score of gastric distension was 3.4 +/- 0.6 points and 3.4 +/- 0.7 points from readers 1 and 2, respectively. We regarded CT images scored with 3-4 points as a technical success for reliable CT volumetry, which achieved a rate of 91.4% (32/35). For the inter-volumetry agreements between 3D and 2D volumetry, the ICCs were 0.9778 and 0.9814 from readers 1 and 2, respectively. The interobserver agreement between readers 1 and 2 was also excellent, with ICCs of 0.9961 and 0.9876 for 2D and 3D volumetry, respectively. On Bland-Altman plots, the means of differences between any pairs of volumetry measurements ranged from -31.1 to 3.2 cm(3), which may be an acceptable range of measurement variability. Post-operative CT gastrography is feasible in patients treated with distal gastrectomy. Both 2D and 3D volumetry methods are comparable in measuring the remnant stomach volume.</P>

Associations between CYP2A6 polymorphisms and outcomes of adjuvant S-1 chemotherapy in patients with curatively resected gastric cancer

Jeong, J. H.,Park, S. R.,Ahn, Y.,Ryu, M. H.,Ryoo, B. Y.,Kong, S. Y.,Yook, J. H.,Yoo, M. W.,Kim, B. S.,Kim, B. S. Springer Science + Business Media 2017 GASTRIC CANCER Vol.20 No.1

<P>CYP2A6 polymorphisms are not associated with toxicity of S-1 chemotherapy, but correlate with the efficacy of S-1 in the adjuvant setting for gastric cancer.</P>

돈분액비 시용수준이 수수$\times$수단그라스 교잡종의 생육특성, 수량 및 용탈수 중 $NO_3-N$ 함량에 미치는 영향

임영철,윤세형,김종근,김원호,최기준,서성,육완방,Lim Young-Chul,Yoon S.H.,Kim J.G.,Kim W.H.,Choi G.J.,Seo S.,Yook W.B. 한국축산환경학회 2006 축산시설환경학회지 Vol.12 No.1

본 시험은 2000년부터 2002년까지 3년간 수행한 결과로 돈분액비 연용시 수수$\times$수단 그라스의 생육, 수량 및 사료가치와 토양환경에 미치는 영향을 구명하기 위하여 축산연구소 조사료자원과 포장에서 무비구, 화학비료(대조구), 돈분액비 100%, 150%, 200%, 돈분액비 100%+화학비료 50%로 처리하여 난괴법 3반복으로 실시하였다. 돈분액비는 전량 기비로 시용하였으며 시험 결과를 요약하면 다음과 같다. 생육특성은 화학비료구와 액비시용구간에 거의 차이가 없었으나, 초기생육은 돈분액비 시용구에서 다소 좋았고, 특히 재생력에서는 추비를 시용한 화학비료구(대조구)와 돈분액비 100%+화학비료 50% 추비구가 우수하였다. 당도는 액비를 시용하므로 다소 높아지는 경향이었다. 건물수량은 화학비료구에 비하여 돈분액비 100, 150% 시용구에서 각각 15, 6% 감소한 반면 돈분액비 200% 시용구에서는 대등하여 다비 조건에서 증수되는 경향이었다. 또한 조단백질 및 ADF, NDF, 건물소화율은 큰 차이가 없어 돈분액비를 시용하여도 사료 가치의 질적인 저하는 없었다. 돈분액비를 시용하고 침투수중 $NO_3-N$ 함량의 변화를 조사한 결과 화학비료에 비하여 돈분액비 150% 수준까지는 대등하였으나 그 이상 시용에서는 용탈수에 $NO_3-N$ 함량이 높게 나타났으며 조사 시기 간에는 일정한 경향이 없었다. This experiment was conducted to investigate the effect of application level of swine slurry on the growth characteristics and yield of sorghum$\times$sudangrass hybrid and $NO_3-N$ content in infiltration at experimental field of Grassland and Forage Crops Division, National Livestock Research Institute, RDA from 2000 to 2002. Treatments were consisted of non fertilizer(NF), chemical fertilizer(CF), 100% swine slurry(SS 100), 150% swine slurry(SS 150), 200% swine slurry(SS 200) and 100% swine slurry + CF 50%(SS100 + CF 50) with randomized complete block design and three replications. Growth of sorghum$\times$sudangrass hybrid was not nearly different among the treatments, but early growth of swine slurry treatments was better than that of CF, and regrowth after 1st cutting was shown better in CF and SS 100+CF 50 with adding application of chemical fertilizer. The sugar content(brix %) was tends to be increased with swine slurry application. Dry matter(DM) yields of SS 100 and SS 150 were lower 15 and 6% than that of CF, respectively, and SS 200 was similer to CF, but there was not found significant difference among all treatments. The content of crude protein(CP), acid detergent fiber(ADF), and neutral detergent fiber(NDF) did not show the difference. The content of $NO_3-N$ in infiltration water was not more than CF by the 55 150 application, but more than by SS 200 and 55 100+CF 50 treatment.