• The Korean Journal of Applied Statistics
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• v.1 no.1
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• pp.21-28
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• 1987

In agricultural research field experiments are usually conducted with the sam etreatments in the same experimental design over several locations for several years in order to draw widely adaptable results. For generalization of the results from the individual locations and the properties of the treatment responses may be evaluated by carrying out the combined analysis over agricultural climate zones or country level. A method of combined analysis of variance was presented and examined by applying to a set of data obtained from a series of rice variety adaptability trials conducted by Kyung Buk Provincial Office of Rural Developmention 1986.

• Solar Energy
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• v.19 no.3
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• pp.115-123
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• 1999

An experimental study was carried out to investigate the flow characteristics of a stationary blade for six kinds of measuring angles of attack, $0^{\circ},\;10^{\circ},\;20^{\circ}\;and\;30^{\circ}$ at Reynolds number of $5.8{\times}10^4$. Instant simultaneous velocity vectors around blade were measured by 2-D PIV system where laser-based illumination and two-frame grey-level cross correlation algorithm were adopted. Velocity profiles show uniform approaching flow from the straightening equipment, and experimental results reveal that separation phenomena occur and the separation point moves upstream with increasing angle of attack.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.05a
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• pp.213-214
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• 2015

The first successful case of a CM application in Shanghai, China in 1993 presented its possibility. According to the State Council's 'Investment system reformation', in 2004, more than 40 sub-provincial divisions in China were increased the productivity of construction by the CM application. It is predicted that CM will be utilized as a technical management method at government's plan, which raises the urbanization level more than 60% through the construction industry by 2020. However, compared with increasing CM demands, there are no complete evaluation criteria of CM in china. For instance, 26 areas in china arrange criteria individually, so. Therefore, it is necessary to establish integrated evaluation criteria on the basis of regional ones. This research will draw the evaluation criteria of selecting for the China CM Corporation in order to vitalize CM system.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1978-1979
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• 2007

In this paper, the authors introduce a high-speed microprocessor based on automatic vacuum capacitor switch with a modified digital filter design using distributed arithmetic. The automation trends particularly the automatic vacuum capacitor switch has helped ameliorate the power factor essentials and automatically triggered to close when the line current exceeds rated value. Microprocessor relays use digital filters to extract only the fundamental and attenuate harmonics. To provide optimum speed characteristics a distributed arithmetic based filter design in the microprocessor controller which not only enhances filtering speed but additionally enables lower power consumption at the cost of area has been introduced. The result is a unified description that describes a digital filter structure down to bit level.

• Korean journal of food and cookery science
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• v.13 no.3
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• pp.319-329
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• 1997

Food procurement practices in elementary schools were evaluated to provide basic information for the efficient foodservice management. Total 85 self-completed questionnaires were collected out of 134 dieticians working for elementary schools in Kyungkido, and analyzed for demographic background, purchasing activities and processing-food utilization status. The results were as follows: 1. The elementary schools were located in urban (22.0%), provincial (58.5%), and isolated areas (19.5%). 2. 62.4% of them were conventional schools and rest of them were commissary schools (37.6%). 3. As the total meals produced in schools increased, the number of meals served per foodservice staff and the workload increased, and more foods were purchased through wholesalers and competitive bids. 4. There were no significant differences (p > 0.05) in food procurement practices by the location, type of foodservice systems and the size of schools. 5. As the number of total meals in schools increased, the level of FPI (Food Processing Index) points for meat products, fish products, kimchi and sauce decreased.

• Korean Journal of Weed Science
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• v.10 no.2
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• pp.83-92
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• 1990

Experiment was conducted to establish the weed control system on the paddy fields by investigating species, period and amount of weeds in Gangwon province. Four locations were selected for these experiments : West plain area, Chunchon(74m above the sea level), mid-mountainous area, Hongchon(300 m), high alpine area, Hoengsong(450m), and east sea area, Myungju(14m). Weed emergence was investigated 6 times from 10 days after transplanting to 60 days with 10 days interval. From the experiments stated above, the results were summarized as follows ; The identity of weed species was small in grass family, but broad-leaf family was numerous. Also the dominant weed species was generally the perenial weeds. The weed emergence was initiated from 10 days after translanting. The amounts of weed counted the most in Chunchon. A large number of weeds were emerged between 30-60 days after transplanting in Chunchon and between 40-60 days after transplanting in Hongchon and Hoengsong. Among agronomic characteristics affected by weed emergence during rice development, plant height was decreased by 2~4cm, panicle number by 1.3~2.9, spikelet by 3.7~7.5, ripening rates 3.3~6.5%, and milled yield by 12~17%, respectively.

• Journal of Environmental Impact Assessment
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• v.12 no.3
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• pp.137-150
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• 2003

This study aims to survey whether local governments have legislated laws and regulations on environment impact assessment system, to compare and analyze specific projects and their scale, assessment items, and procedures & discussion process, to identify issues and generate improvement plans, and to suggest a direction for future legislation to local governments that plan to legislate laws and regulations in the future. Major outcome of the study are as follows. First, terminologies used for environment impact assessment by local governments need to be unified. Also, laws and regulations need to be legislated soon. Second, in "urban development project" areas, a total of nine project areas including "quarrying of soil and stone, sand, gravel, and minerals" was essential common projects. A total of six project types were added or newly established compared to national systems. Among them, four project types were added within national-level project areas and two project types were not available under the national-level project areas and newly added due to the nature of local governments. Third, in terms of project scale, scale enhancement of "urban development project" was most common. Analysis showed that in case of clean natural environment such as Cheju Island, it is necessary to consider reinforcing project areas where development activities take place directly in forests or rivers such as "industrial base and complex development", "water resource development", and "development of tourism complex." Fourth, the discussion and review procedures of assessment reports were similar to those at government level. However, in case of Seoul city, it is required to write a "preparation plan" before drafting an assessment report. The city features partial introduction of scoping and screening, which allows to exempt discussion procedures if impact on environment is found to be minimal after drafting the assessment report. In case of national-level, it has a dual system that is split between Ministry of Construction and Transportation and Ministry of Environment. However, in case of environment impact assessment of local governments, it is a single system where city mayors and provincial governors are in charge of both project execution and environmental assessment. Therefore, the most important task is how to satisfy objectiveness and accountability.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.49 no.4
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• pp.385-394
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• 2013

This study has conducted a comparative analysis on the fishing efficiency of LED fishing lamps by squid jigging vessels, the Yeongrak-ho (16 tons) and Somang-ho (9.77 tons), which operated during September and October 2010 and during October 2011, comparing with MH (Metal Halide) fishing lamp-equipped fishing vessels. This study has also examined vessel's fuel consumption level. The light powers of LED fishing lamps of the Yeongrak-ho and Somang-ho were 25.8kW and 32kW, respectively. Those of the MH fishing vessels, that is, the MH fishing lamp-equipped fishing vessels, were 105kW and 81kW, respectively. The average squid catch in number of an LED vessel, Yeongrak-ho, was 39.2% of the MH fishing lamp-equipped fishing vessels; however, that of the Somang-ho improved to 78.7% of the MH fishing lamp-equipped vessels. Average catch in number by Yeongrak-ho crew was 2.6 times more than catch in number by automatic jigging machines. Average catch in number by MH fishing vessel crew was 1.8 times more than that by automatic jigging machines. An LED vessel, Yeongrak-ho's fishing rate was 17.5%~152.2% of the MH fishing vessels, that is, 61.1% on average, in comparison of combined catch in number per automatic jigging machine and per crewmember. Somang-ho's fishing rate was 6.7%~127.6% of the MH fishing vessels, that is, 73.1% on average. The average fuel consumption level of the Somang-ho, throughout its departure from to arrival at the port, was 475.7l, and that during fishing hours was 109.6l, or 23.0% of the total fuel consumption level. Somang-ho's fuel consumption level per fishing hour was 9.7l on average.

• Journal of Labour Economics
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• v.32 no.1
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• pp.31-56
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• 2009

This paper analyzes the determinants of the employment status of the NURI-project-teams' college and university graduates in Busan area. The major results are as follows: First, education level, household income, grade point average and certificate turn out to be significant variables to decide employment or spell of unemployment. Second, parents' education level, household income, the size of project team, the firm size are shown to affect employment in Busan. In particular, the bigger the firm is, the probability of getting job in Busan is getting smaller. And there are two sides of provincial university graduates' moving into the Metropolitan area; the voluntary move and the involuntary move. Third, sex., education level, major, grade point average, the size of project team etc, are found to be significant determinants of wage level.

• Journal of Soil and Groundwater Environment
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• v.10 no.2
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• pp.12-19
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• 2005

Jeju island is one of the highest rainfall areas in the Korean peninsular. However, variation in rainfall amount is much great with years, which resulted in substantial variation in annual groundwater recharge and sustainable yield. Therefore, to cope with groundwater hazard including sea water intrusion and water level decline in accordance with successive extreme drought, Jeju province established a stepwise action system, in which management of representative monitoring wells and corresponding actions to water level conditions was enforced. In this study, rainfall and groundwater monitoring data were analyzed to determine management groundwater level on Jeju island. First, rainfall data for last 30 years were analyzed, which yielded a lower limit of rainfall at a confidence level of 99% as a basis rainfall. Only when the rainfall less than the basis rainfall was sustained over 3 months, the water levels were targeted for the analysis. For the water level data selected using the above criteria, the lower limit of 99% confidence interval was determined as a reference groundwater level. Finally, some ratios of reference groundwater level was determined as stepwise management groundwater level on Jeju island.