• Korean Journal of Ecology and Environment
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• v.36 no.1 s.102
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• pp.1-8
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• 2003

Growth, colony formation and microcystin production of 'low-toxic' Microcysits aeruginosa $K{\"{u}}tzing$ were examined in relation to the 'info-chemicals' released by zooplankton. Algae were cultured in a medium with or without filtered water taken from cultures of Daphnia magna Straus (300 ind./L) or Moina macrocopa Straus (500 ind./L), The growth of M. aeruginosa, based on cell number, was also significantly different from populations cultured in the media with and without filtered zooplankton water from the exponential growth phase. In the 6-day experiment, the growth pattern of M. aeruginosa cultured with ZCMF was clearly different to control with-out ZCMF. Mean number of cells/particle and particle bio-volume of M. aeruginosa increased significantly from the day 2 for the Daphnia-CMF or Moina-CMF treat-ments. Microcystin production was promoted showing from 18.7 to 55 ${\mu}g/g$-dry cell in the zooplankton treatments relative to the controls. At peaked level on day 4, the highest level of up to $70.5{\pm}16.8\;{\mu}g/g$-dry cell was observed in the D. magna treatment. This study suggested that 'info-chemicals' from zooplankton might induce the increase of algal growth rates, colony formation and microcystin production, these seem to be advantageous to the alga and thus as a grazing defense mechanism.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.4
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• pp.62-72
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• 2015

Nowadays the issue of aging society has received considerable critical attention, especially in transportation planning and demand forecasting. This study identified the factors related to travel time budget for elderly by purpose using seemingly unrelated regression model (SUR model). The SUR model is suitable when error terms of each equation are assumed to be correlated across the equations in terms of travel time budget which is constant in 2 hours per day commonly. The results showed that elderly's travel time budget was affected by individual, household, urban facility and transportation service. The leisure travel comprised a large proportion of total travel time and had a positive relationship with elderly, sports, religious facilities. Moreover, the elderly who had low income or unemployed person had low frequency of social activity such as leisure, shopping and business. This study can provide a comprehensive implications of forecasting the future travel demand and analyzing the travel behavior.

• Journal of agricultural medicine and community health
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• v.30 no.3
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• pp.255-262
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• 2005

Purpose: In Ulleung island, emergency medical transport by helicopter is very important. So, we analysized our experience with emergency medical transport by helicopter for 4 years and we were compared our data with other data for 1997-2001. Therefore we need to research public health development direction. Method: We analysized patient's medical record for 4 years. Result: During 4 years, 104 transports were done and 130 patients were trasported to tertiary hospital center, there was more increased than that from 1997 to 2001. Helicopters from Pohang coast guard, Donghae coast guard, Navy, and 119 rescue etc. were used, but 119 rescue transport was decreased more and more. The 60's patients was most, 22.3% and teenager's and 80's patients was lowest. The male was 65% but the female was increased more and more annually. In addition, the older patients was the more portion of female patient. The transport was concentrated in daytime. The traumatic patient was much in winter period. The cerebrovascular accident was 1st cause of patient and fracture was many also. Conclusioon: Except Fire service's helicopter, the other helicopter was not apt to emergency medical tansport. But Fire service's helicopter was not used commonly because Fire service's helicopter was in Daegu, so distant and time consumed. As a result, emergency medical transport helicopter is needed in east coast like Fire service's helicopter. In addition, trauma prevention education and public health education for hypertension and diabetes will be essential and public health system in Ulleung island will be prepared for aging society.

• Korean Journal of Plant Resources
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• v.27 no.5
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• pp.429-438
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• 2014

This study was designed to investigate the effects on anti-oxidative activities and increasing extraction yield of Aralia elata Cortex by gamma irradiation. Electron spin resonance (ESR) analysis as physical techniques for irradiation identification of Aralia elata showed that a pair of peak appeared on a space of 6.0 mT at the left and right of symmetric unspecific central ESR spectrums, confirming that the plant was gamma-irradiated. The optimum extracting conditions for preparing gamma irradiated samples from Aralia elata Cortex were to extract with 50% ethanol for 15 hrs after 10 kGy irradiation. DPPH scavenging activity and ABTS radical cation inhibitory activity of the water and 50% ethanol extracts from non irradiated and irradiated Aralia elata Cortex was very high as over 80% and 98%, respectively, at tested low concentration of $50{\mu}g/mL$. Antioxidant protection factor (PF) as anti-oxidation indicator of lipophilic compounds showed a very high level of activity as 2.18~2.78 PF. As for TBARs, water and ethanol extracts showed high level. Increase of TBARs inhibitory activity of water extracts was not shown by gamma-ray irradiation but ethanol extracts showed slight increasement of TBARs inhibitory activity with 10 kGy gamma-ray irradiation. These results shown confirmed increasement of extraction yield for phenolic compounds and anti-oxidative activity from Aralia elata. Thus, the treatment of gamma-irradiation can be used a way to amplify a solubility for biological active compounds and anti-oxidative activity in plants.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.80-97
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• 2010

With the hubbing strategy, construction of "Incheon Airport Railroad(AREX)" was proceeded to expand the accessibility at the level of airports in rivalry like Kansai and Chek Lap Kok. At the present 1st phase which routes from Incheon Airport to Kimpo Airport is opened March 2007. 2nd phase which is planned from Kimpo Airport to Seoul station will be opened at the end of October 2010. But the accessibilty to AREX is delinquent because it is connected only in Seoul station and the maximum operation speed is 110km/h which downgrade the time competitiveness with airport limousine. In addition, transfering of user is necessary to access to AREX from Kyungbu KTX. With these reasons, travel demand in 1st phase section is low(7%). According to reestimation of travel demand, demand analysis result compared with convention condition is insufficient, so required annual average government grant-in-aid amounts to 200 billions won, and it is right time to develop the method for revitalization of Incheon airport railroad. In this paper, facilities plan and operating plan to make new travel demand by speed-up which is able through substitution train now running with high speed train(EMU, 180km/h) and direct connection of KTX, will be suggested. This will contribute to offering high speed railroad service to customers and the reduction of government grant-in-aid by way of demand expansion.

• The Journal of Internal Korean Medicine
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• v.19 no.1
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• pp.202-218
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• 1998

In order to evaluate the effects of SIMNETONG, GANGJIYOUNSOODAN and CHUNGSIMJOKITANG(Xinnao-Tong, Jiangzhiyanshou-Dan and Qingxintiaoqi-Tang) on hyperlipidemia, the experimental study was performed in rats without or with hyperlipidemia induced by 2% cholesterol fed-diet or Triton WR-1339. And the levels of serum total cholesterol, triglyceride, HDL-cholesterol, LDL-cholesterol and phospholipid were measured. The results are summarized as follows : In the model of hyperlipidemia induced by 2% cholesterol Fed-diet 1. Both low & highly concentrated GANGJIYOUNSOODAN showed significantly decreasing effects on the level of serum total cholesterol while SIMNETONG & CHUNGSIMJOKlTANG didn't. 2. GANGJIYOUNSOODAN, SIMINETONG and CHUNGSIMJOKITANG showed decreasing effects on the level of serum triglyceride with no statistical significance. 3. Only highly concentrated GANGJIYOUNSOODAN showed increasing effects on the level of serum HDL-cholesterol while the others had no effects. 4. Only highly concentrated GANGJIYOUNSOODAN had decreasing effects on the level of serum LDL-cholesterol while the others had no effects. 5. Highly concentrated GANGJIYOUNSOODAN and CHUNGSIMJOKITANG showed significantly decreasing effects on the level of serum phospholipid while the other had no effects. In the model of hyperlipidemia induced by Triton WR-1339 6. SIMNETONG, GANGJIYOUNSOODAN and CHUNGSIMJOKITANG showed slightly decreasing effects on the levels of serum total cholesterol and triglyceride with no statistical significance. 7. None of SIMNETONG, GANGJIYOUNSOODAN and CHUNGSIMJOKITANG showed any effects on the level of serum HDL-cholesterol. 8. Highly concentrated GANGJIYOUNSOODAN and CHUNGSIMJOKITANG showed decreasing effects on the level of serum LDL-cholesterol but the other had no effects. 9. All of highly concentrated SIMNETONG, GANGJIYOUNSOODAN and CHUNGSIMJOKITANG showed decreasing effects on the level of serum phospholipid with statistical significance. These results show that GANGJIYOUNSOODAN and CHUNGSIMJOKITANG, in orders, have antihyperlipidemic effects. Further study on the mechanism and on the herb screening of these prescription should be followed.

• Journal of the Korean Society of Radiology
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• v.14 no.5
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• pp.577-584
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• 2020

In this study, the number of non-English speaking visitors is increasing day by day, and accordingly, there was a limitation in language communication and communication during radiographic examination. To this end, after distributing the handbook produced for inspection, the improvement effect of before and after explanation was examined. The score scale was not statistically significant as to whether it was the test site or not, and the degree of discomfort of the test, the degree of understanding of the breathing guidelines, and the satisfaction of the test description were improved and the score scale was improved before and after the description of the guide. Non-English-speaking foreign visitors were more satisfied with explanations in their own text than in English or Korean, and the method was also able to conduct effective inspections by informing the foreign guests when to control their breathing by using the lighting signals in the laboratory. In the future, the quality of medical services and imaging medical examinations can be improved only when communication methods are implemented from various perspectives, such as developing various language interpretation programs, developing guides for various test sites, and developing tools and improving foreign language skills of radiologists and medical staff. There will be. In the future, it may be used as a basic resource to prepare a manual that can be used to examine non-English speaking foreigners who do not understand English or Korean in other radiology labs.

• Journal of Food Hygiene and Safety
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• v.15 no.2
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• pp.108-113
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• 2000

This study was carried out to propose a simple method for the extraction of seven tar dyes such as tartrazine, sunset yellow FCF, amaranth, erythrosine, allura red, brilliant blue FCF and indigo carmine using aminopropyl amine cartridge and to determine the content of the dyes in candies, soft drinks, ice bars and okchuns produced in Korea. The tar dyes were simultaneously analyzed by reverse phase high performance liquid chromatography(HPLC). The recovery rates of the dyes ranged from 65.8% to 99.6%. The contents of the dyes in candies, soft drinks, ice bars and octhuns were N.D.∼50.1 mg/kg, N.D.∼49.9 mg/kg, N.D.∼56.0 mg/kg and N.D.∼867.3 mg/kg, respectively. The types of the dyes used most frequently for candies, soft drinks and ice bars were tartrazine, brilliant blue and amaranth, respectively. Of the samples, tartrazine was used frequently, and indigo carmine was not used at all.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.5
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• pp.49-58
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• 2010

The traffic signal controllers being used in the domestic currently are being manufactured based on the korean national police standard which was developed for controlling the quad-light traffic signal having the red, yellow, left-turn arrow, and green lights. But according to the national policy for the traffic operation, they have to be changed to be able to switch the tri-light signal having red, yellow and green lights. In this study, a new tri-light traffic signal controller was designed and developed by the way improving the Signal Control Unit of the existing quad-light standard traffic controller. The Load Signal Unit(LSU) was improved to output 6 signals which are the two assemblies of three signal indications having the red, yellow, and green lights. To enough traffic signals output to control each directional movements and the various transport modes which are car, bus, bike, and pedestrian etc., the connector bus system was designed to be able to accommodate maximum 96 signals outputs being constructed by 16 LSUs. Flasher device was developed to be able to support maximum 32 red signals. In the software, the communication protocol between traffic control center and the traffic signal controller was improved and new signal map code values were defined for the developed LSU controlling the quad-light traffic signal. A model of the quad-light traffic signal controller developed and was tested three operations, protocol-operation, remote-command and control-mode. The test result operated all of them successfully.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.5
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• pp.1-13
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• 2010

In this paper, we describe the result of the test-bed on Nation-wide Interoperable Transportation System connected with Interoperable Traffic Information Collection System, which was developed by Korea Financial Telecommunications & Clearings, KOREAIL NETWORKS, HiPlusCard and Samsung SDS. we constructed Nation-wide Interoperable Transportation System on 4 downtown bus routes, 20 stations on line 1 subway, 2 stations of a train and 2 sections of the Honam highway in Gwangju and Interoperable Traffic Information Collection System in Seoul University IC Card Center. So we operated that by 480 Several staff were given a test card and asked to try it for about 6 months. This test-bed is for demonstrates the accuracy, safety and credibility of the Nation-wide Interoperability standard technology and it can be applied to all of transportation practically. When the staffs contact the card to Purchase terminal, the card performs transaction with Purchase SAM in the terminal, then transactions ara used to calculate in Settlement system and Interoperable Traffic Information Collection System. Through the test-bed, we examined this process and found unexpected problems happening during the test operation and have successfully solved them. In addition, the results of the test-bed let us know what additional improvement might be required for System. The successful run of the test-bed was verified by an evaluation of the test-bed staff and a public survey.