• KOREAN POULTRY JOURNAL
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• s.7
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• pp.43-46
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• 1970

• KOREAN POULTRY JOURNAL
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• s.6
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• pp.72-74
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• 1970

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.8
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• pp.974-985
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• 2016

Riverbed Modeler, which is a commercial packet-level discrete event simulator is used to model, design, and simulate complicated communication protocols and large-scale network. Riverbed Modeler got credit for its reliability in field of network simulation. In the MANET simulation environment using Riverbed Modeler, it is very complicated to add a new routing protocol into existing architecture of routing protocols because it is required lots of modifications of protocol recognition. In this paper, we propose Routing Adding Framework which can reduce errors or mistakes during modifying the existing routing support architecture. Routing Adding Framework is provided as a adapter API for protocol recognition. and it is only minimum modifications for protocol identifiers when a new routing protocol is added to the child process of manet_mgr process which manages routing protocols for IP layer. With Routing Adding Framework, we can reduce less than half modification. Then, we shows an example of implementation of a hybrid routing protocol AntHocNet using Routing Adding Framework, and we verify its design and application of the Routing Adding Framework by obtaining simulation result with similar result given by AntHocNet.

• Food Science and Preservation
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• v.11 no.3
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• pp.331-335
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• 2004

This study was carried out to improve quality of minimally processed lettuce with various treatments. The treatments for preventing enzymatic browning were using different chemical immersion solutions and controlling microbial growth were using chlorine, electrolyzed water, and organic acid. The solution with ascorbic acid 1$\%$ and citric acid 1 $\%$ showed a positive effect on antibrowning of minimally processed lettuce. In the inhibition of microorganisms growth, 200 ppm NaCIO solution was more effective than fermented pollen solution and Na-dichloroisocyanurate solution. In electrolyzed water system, no-diaphragm system showed inhibitory effect of microorganisms growth. Also, total microorganisms count of minimally processed lettuce with ascorbic acid and citric acid solution was lower by about 4 log cycle after 4 days storage at l0$^{\circ}C$.

• Journal of Sericultural and Entomological Science
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• v.18 no.1
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• pp.1-5
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• 1976

This work was carried out to investigate how the effects on the growth af branches and the yield of mulberry leaves are shown, when two of each dwarf and normal branches are thinned out in sumner or early autumn. The results obtained are summarized as follows. 1) In mulberry trees after spring pruning: in case of thin out branches in summer and harvest in autumn (42 days after treatment), (1) The average length of branches in thin out trees showed 19% increase by autumn, which turned out to be 11% higher than that of non-thin out did (8%) (2) The thin out treated mulberry trees presented 9% increase in total yields of summer and autumn, when compared with those of the non-thin out trees. 2) In mulberry trees after sumner pruning: in case of thin out branches in early autumn and harvest either in autumn (15 days after treatment) or in late autumn (28 days after treatment), (1) The average length of branches showed about 6∼7% and 8%, intercase by autumn and late autumn, respectively. Thus no effects of thin out treatment could be recognized in growing of branches. (2) The thin out treated mulberry trees presented about 6% increase in total yields of early autumn, showing no significance through, when compared with those of ron-thin out treatment. Whereas the total yields of early autumn and late autumn showed 12% increase with significance at the level of 5% by thin out treatment. (3) As above mentioned, the thin out of mulberry branches brought about a good effect on yields of mulberry leaves, though less on average length of branches. It may be considered that the thin out treatment makes improve the living condition in mulberry trees and in turn induces photosynthesis actively, which results in increase the weight of leaves.

• Tuberculosis and Respiratory Diseases
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• v.66 no.3
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• pp.198-204
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• 2009

Background: First-line drugs, if sensitive, are the most potent drugs in the treatment of multidrug-resistant tuberculosis (MDR-TB). This study examined the frequency and risk factors associated with acquired drug resistance to first-line drugs during a standardized treatment using first-line drugs in patients with MDR-TB. Methods: This study included patients who were diagnosed with MDR-TB at the National Masan Tuberculosis Hospital between January 2004 and May 2008, treated with standardized first-line drugs, and for whom the preand post-treatment results of the drug susceptibility test were available. Their medical records were reviewed retrospectively. Results: Of 41 MDR-TB patients, 14 (34.1%) acquired additional resistance to ethambutol (EMB) or pyrazinamide (PZA). Of 11 patients initially resistant to isoniazid (INH) and rifampicin (RFP), 3 (27.3%) acquired additional resistance to both EMB and PZA, and 3 (27.3%) to PZA. Of 18 patients initially resistant to INH, RFP and EMB, 6 (33.3%) acquired additional resistance to PZA. Of 6 patients initially resistant to INH, RFP and PZA, 2 (33.3%) acquired additional resistance to EMB. Ten of the 41 MDR-TB patients (24.4%) changed from resistant to susceptible. No statistically significant risk factors associated with acquired resistance could be found. Conclusion: First-line drugs should be used cautiously in the treatment of MDR-TB in Korea considering the potential acquisition of drug resistance.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.9 no.2
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• pp.143-150
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• 1976

A trial has been made to find out a new method of calculating the survival rate of a fish Population utilizing the length composition data and the characteristics of the frequency curve of the length which usually is normal distribution curve. In this paper, a stochastic method is introduced and applied to calculate the survival rate of yellow croaker caught by Korean trawlers in the Yellow Sea and the East China Sea in 1971. The results are as follows : Mean of survival rate 0.46089 Variance 0.03073 Standard deviation 0.17529 95 percent confidence interval 0.36040-0.56138.

• Reproductive and Developmental Biology
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• v.30 no.1
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• pp.1-5
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• 2006

Artificial activation of oocytes is a prerequisite for the successful cloning by nuclear transfer. This study investigated the effect of the different combination of activation agents such as electric pulse (E), thimerosal (Thi) + dithiothreitol (DTT), 6-dimethylaminopurine (6-DMAP) or cycloheximide (CH) on the developmental ability of porcine embryos derived from parthenogenetic activation (PA). PA embryos activated with chemicals showed significantly higher developmental rate to the blastocyst stage compared to the embryos activated with E alone ($21.5{\sim}28.1%$ vs. 18.0%, respectively). Of chemicals, Thi + DTT supported higher development to the blastoryst stage (28.1%). There was no significant difference in 1 pronucleus (PN) formation rate $(59.9{\sim}64.7%)$, but 2PN formation rate was significantly higher in PA embryos with additional activation using chemicals $(7.2{\sim}9.7%)$. In conclusion, this study shows that chemical activation after electric pulse can increase the development of porcine PA embryos.

• Management & Information Systems Review
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• v.33 no.1
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• pp.219-235
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• 2014

This study investigate the smart phone that is not included in the studies that test the effect of added functionalities to convergence products. There are several questions that PDA, MP3 players that are added a certain function can be good convergence product that consumers love and these are the products that has problem of decrease of sales volume because of the development of smart phone. It is a little bit strange to test these product for this study, so this study suggest a little different research tool compared to the past studies. The research implications are follows like theses. Brand awareness is important factor that decrease the uncertainties and risks specially when a innovative tech is added to smart phone. A situation that a innovative tech is added to smart phone is best to get the consumer's perceived innovativeness, value, and buying intention. And a situation that a innovative tech is added to smart phone in the context of low brand awareness is better than a situation that various normal teches are added to it.

• Horticultural Science & Technology
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• v.28 no.3
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• pp.394-402
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• 2010

The objective of this study was to identify the effects of ozone on the two species in controlled environment. $Sedum$ $kamtschaticum$ and $Hosta$ $longipes$ were exposed in both control and ozone chamber to investigate photosynthesis, antioxidant enzyme activity, visible damage, the number and the size of stomata and the plastogloubuli. Ozone was fumigated in the concentration of $200{\mu}g{\cdot}kg^{-1}$ for 8 hours in a day (from 08:00 AM to 04:00 PM). Firstly, net photosynthesis of two species was decreased after ozone fumigation. Secondly, glutathione reductase activities showed significant difference between control and ozone treatment. Thirdly, visible symptoms of leaves were expressed such as chlorosis, necrosis and decoloration. Also, the size of stoma was significantly decreased in ozone-exposed plants. Furthermore, the intercellular space of $Hosta$ $longipes$ showed increased phenomenon because the mesophyll was collapsed. The number and the size of the plastogloubuli were significantly larger in ozone stress.