• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.317-322
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• 2002

농가보급형 마늘쪽 분리기 개발을 위하여 마늘의 품종별 기하학적 특성을 분석하고, 나선 부착 원추 드럼식 마늘쪽 분리기를 제작하여 성능시험 및 농가 현장시험한 결과를 요약하면 다음과 같다. 1)종구용 통마늘의 크기를 조사한 결과 직경은 의성, 무안, 자봉이 각각 44.3, 51.9, 60.2mm로 나타났다. 2)통마늘의 최대 압축력 및 마늘쪽의 생물체항복 강도를 시험한 결과 수평방향 최대 압축력은 의성, 무안, 자봉마늘이 각각 185.1, 145.8, 148.5N이고, 마늘쪽의 생물체 항복강도는 의성, 무안, 자봉마늘이 각각 272.4, 336.2, 413.2N/$cm^2$로 통마늘은 의성종이 단단 하나 마늘쪽은 무안이나 자봉마늘에 비해 단단하지 않은 것으로 나타났다. 3)나선부착 원추 드럼 및 경사원통식 마늘쪽 분리장치를 제작하여 성능시험한 결과 1쪽 분리율이 의성, 무안, 자봉마늘에서 각각 58.2, 64.7, 95.2%이고, 손상율은 각각 2.0, 2.4, 1.9%이었으며 작업능률은 시간당 210kg(약 60접)이었다. 4)시작기를 전남무안의 재배농가에서 현장 시험한 결과 1쪽분리율은 75.9%, 손상율은 0.8%, 파종 후 출현율이 94.3%로 농가적응성 및 실용성이 높은 것으로 판단되었다.

• Journal of the East Asian Society of Dietary Life
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• v.19 no.2
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• pp.187-194
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• 2009

The aim of this study was to investigate the physicochemical characteristics of native Korean Allium wakegi Araki samples, which were grown from seven local seed bulbs(Yesan, Muan, Anmyon-do, Deokjeok-do, Jeju-do, Yecheon, and China) to produce high quality native Korean Allium wakegi Araki. For the proximate composition of samples, moisture contents were in the range of 90.69~92.43%. The crude protein content of the Jeju-do sample was highest compared to the other samples. However, there were no significant differences in total sugar contents between samples. The seed bulb origin did not affect the hardness of the stem part, but was high for the leaves of the Yesan sample compared to the other samples. The results for anti-oxidative activity were as follows: Yesan(2.30 mg/mL) > China(2.51 mg/mL) > Muan (2.56 mg/mL) > Yecheon(2.74 mg/mL) > Jeju-do(2.85 mg/mL) > Anmyon-do(2.87 mg/mL) > Deokjeok-do(3.18 mg/mL). In terms of mineral and amino acid contents, the Yesan sample showed the highest levels, respectively, compared with the other samples. Food values such as contents of total phenolics and pyruvic acid were highest in the Jeju-do sample. These results show that the physicochemical characteristics of Allium wakegi Araki were significantly different according to different seed bulb origins.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.38 no.10
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• pp.859-864
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• 2014

This experimental study investigates the effects of a downstream cylinder in the wake change on upstream object's diameter. A V-shaped object is placed in the upstream of the test section and a circular cylinder containing a load-cell is placed in the downstream. The velocity distribution of the wake generated from the upstream object with a change in its diameter is investigated. Further, the fluctuation in the lift coefficient and Karman-vortex emission frequency with a change in the position of the downstream cylinder is examined. The study results reveal the following. i) The flow velocity in the wake is smaller than that in the main stream. ii) The lock-in phenomenon occurs when the diameter of the upstream object is larger than that of the downstream cylinder. iii) To generate maximum fluctuating lift force of the downstream cylinder in the wake, the position of the downstream cylinder must be moved with changing diameter of the upstream object together.

• Journal of Forest and Environmental Science
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• v.11 no.1
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• pp.61-71
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• 1995

From Salix maximowiczii of the Korean Salix, morphological and palynological characters were investigated by stereoscopic, light, and scanning electron microscopes. Also, this study was eonducted to investigate the effect of meteorological factors on the disjunct distribution in Salix maximowiczii forests grown within the restricted region. 1. Morphological characters of S. maximowiczii clarified with the descriptions and figures. 2. The palynological description was made to the S. maximowiczii and identified distinctly species. 3. S. maximowiczii is distributed only in Baekdam and Hangyeryong valley of Mt. Sorak in Kangwon-do, and valley of height region in Kyeongseong-gun (Hamgyongbuk-do), Sinhueng-gun, and Pungsan-gun (Hamgyongnam-do) in North Korea. 4. Water factors was better than temperature factors in the influence of meteorological factors for disjunct distribution. 5. These ecological and taxonomical informations could be used in practical application for silvicultural prescription, such as erosion control forest, timber production, and development of green area in river bank.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.45-52
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• 2020

We examined the dyeability and antimicrobial activity of silks dyed singly with Sophora japonica L., Curcuma longa L., combination-dyed with Polygonum tinctorium L. and Sophora japonica L., and with Polygonum tinctorium L. and Curcuma longa L.. The color of silk dyed singly with Sophora japonica L., Curcuma longa L. was Yellow with Hue of 5.0Y and 0.6Y, respectively. Two types of combination-dyed silk were Blue Green with 2.6BG and 1.5BG, respectively. In the case of dry Cleaning fastness and rub fastness, all four types of dyed silk was good, achieving grade 4~5. The antimicrobial activity of Staphylococcus aureus of silk dyed with Sophora japonica L. extract showed excellent antibacterial activity of 99.5% and the other three types of dyed silk of 99.9%. In addition, in antibacterial activity against Klebsiella pneumonia, silk dyed with Sophora japonica L. extract showed 99.6%, and the other three types of dyed silk exhibited excellent antibacterial properties of 99.9%.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.9
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• pp.2223-2228
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• 2014

Available shafts with gears at each end of the cylinder-shaped steel are widely used as power train components for automobiles. In order to automate the production of a geared shaft, there are problems to be solved. After one side of the cylinder is cut in gears, one of the problems is to determine the position of the cylinder which has been already cut. The shaft is then to be fed ahead with geared position to the chuck with jaws in geared shape. The other problem is to acquire information on an angular position of the shaft to fit to the jaws of the chuck. This paper deals with the magnetic detection sensor of gear position. Coils are installed in two places. Self-inductances of coils are detected by the changes of reluctance and are then compared. The magnetic analysis also has been carried out by the finite element analysis (FEM).

• Science of Emotion and Sensibility
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• v.20 no.3
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• pp.3-12
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• 2017

This research was carried out in order to suggest useful data for planning fabrics of summer eco-friendly fashion products. For this purpose, four cellulose fabrics were dyed with natural indigo under three different dyeing conditions, then, their colorimetric properties and color sensibilities were evaluated, and their influences on color preferences were analyzed. All cellulose fabrics naturally dyed with indigo showed the characteristics of PB color tones, middle and low value, and low chroma. Color characteristics were significantly different according to fiber type and dyeing condition. The color sensibilities of the fabrics dyed with indigo were classified into three factors: sporty, classic and natural. These sensibilities showed partially significant differences according to fiber type and dyeing condition. Also, there were partially significant relationships between color characteristics and the color sensibilities of the fabrics dyed with indigo. The color preferences of the dyed fabrics with indigo were found to be influenced by the sporty and classic of color sensibility and $L^*$ of color characteristics.

• Korean Journal of Medicinal Crop Science
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• v.9 no.1
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• pp.76-82
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• 2001

This study was conducted to find out the optimum ranges of soil physical properties for wasabi growth by the relationship of soil physical properties and plant growth. Soil bulk density and hardness were higher in decomposition of granite and river sand than hydroball. This root distribution of surface layer was higher in decomposition of granite and river sand than hydroball. Growth characteristics and yield were higher in hydroball than decomposition of granite and river sand. In inlet site, the marketable rhizome weight in decompasition of granite, river sand, hydroball were 298kg/10a, 401kg/10a, 766kg/10a, respectively. But outlet, the weight in three soils were 251kg/10a, 256kg/10a, 633kg/10a, respectively.

• Fire Science and Engineering
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• v.24 no.3
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• pp.93-98
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• 2010

Even though the sprinkler system is a essential fire suppression system, the design engineers do not fully understand the concept of design area which sprinklers operate. They frequently made a mistake to form design area and calculate it. The shape of design area is a square or a rectangle which branch side line is a little longer than the cross main side. NFPA demands to lengthen the branch side to 1.2 times than the cross main side and FM demands 1.4 times. The longer the branch side at the same design area is, the bigger the water quantity and pressure is. At the results of hydraulic calculation of design areas, when the branch side is longer 1.2 times, the water quantity became 4.6% bigger than exact square and the pressure came to 4.67% bigger. When it is longer 1.4 times, the water quantity and the pressure are bigger 7.52%, 14.51%. Therefore, the sprinkler design engineers should follow the general rule of design area, exact square or rectangle which length along the branch line is a little longer than length along the cross main, to design more stable system.

• KOREAN POULTRY JOURNAL
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• v.14 s.156
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• pp.43-46
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• 1982

병아리 주령별 체중 차이를 이용해 육용계의 능력향상을 유도하고 성장속도를 빠른쪽으로 개량해 종란의 무게도 무거운 쪽으로 바꿔가고 있다.