• Korean journal of food and cookery science
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• v.31 no.1
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• pp.41-52
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• 2015

The substitute tea was manufactured from the leaves of Salvia plebeia R. Br. (SPR) that have anti-inflammatory and antioxidative activities. Total polyphenols and flavonoids in SPR were $71.8{\pm}4.74GAE\;mg/g$ and $38.7{\pm}2.95QUE\;mg/g$, respectively. DPPH radical scavenging activity of SPR water extract had an $RC_{50}$ of $16.9{\mu}g/mL$. SPR inhibited lipopolysaccharide (LPS)-induced nitric oxide (NO) production with an $IC_{50}$ of > $100{\mu}g/mL$. Medium and large leaves were used in the SPR substitute tea (SPRT). The water content was dissipated on roasting within approximately 10 minutes, and the tea obtained from fan-firing for a total 120 minutes was evaluated as most superior. Flavor was positively correlated with the taste and general preference. SPRT maintained its anti-oxidative activity without significant changes on roasting or fan-firing even after the heat treatment. The appropriate weight of a tea bag for one serving was 1.0 g. The study results indicated that SPR is a potential resource for the development of food or ingredients with anti-inflammatory properties.

• Korean Journal of Poultry Science
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• v.42 no.4
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• pp.299-305
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• 2015

The production performance and egg quality traits among five strains of Korean native chickens (KNC) were evaluated in conventional cages. A total of 240 KNC were housed in a controlled environment. Each strain had 12 replicates with 4 chickens per cage. Feed intake, body weights, egg production and egg quality were measured at 24, 28 and 32 of weeks. Egg quality parameters were analyzed using 150 eggs. Results indicated significant (P<0.05) difference in average body weights, egg production and egg weight among five strains of KNC. In contrast, KNC strains effect was non-significant (P>0.05) for feed efficiency. The difference among those KNC strains on egg shell color, egg shell strength and egg shell density were not different (P>0.05) at the age of week 24 while it was significant (P<0.05) at the age of week 28 and 32. There was no effect (P>0.05) on egg length and egg shape index from five strains of KNC. The significant difference (P<0.05) was observed in egg width with KNC strains during early ages (week 24 and 28) and it was not significant (P>0.05) at the age of 32 weeks. Regarding internal quality parameters, albumen height and Haugh unit were significantly (P<0.05) affected with KNC strains while the effect on yolk color was not significant (P>0.05). Based on the egg weight and the production performance, GS-10 KNC strain was superior when compared with the other strains.

• Fisheries and Aquatic Sciences
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• v.15 no.3
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• pp.197-202
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• 2012

This study examined and compared the exopeptidase and endoprotease activities of the hepatopancreas (HP) of cuttlefish, squid, and octopus species. The protein concentration in crude extract (CE) from octopus HP was 3,940 mg/100 g, lower than those in CEs from squid HP (4,157 mg/100 g) and cuttlefish HP (5,940 mg/100 g). With azocasein of pH 6 as a substrate, the total activity in HP CE of octopus was 31,000 U, lower than the values for cuttlefish (57,000 U) and squid (69,000 U). Regardless of sample type, the total activities of the CEs with azocasein as the substrate were higher at pH 6 (31,000-69,000 U) than at pH 9 (19,000-34,000 U). With L-leucine-p-nitroanilide (LeuPNA) of pH 6 as the substrate, the total activity of the HP CE from octopus was 138,000 U, higher than values from both cuttlefish HP (72,000 U) and squid HP (63,000 U). Regardless of sample type, the total activities of the CEs with LeuPNA as the substrate were higher at pH 6 (63,000-138,000 U) than at pH 9 (41,000-122,000 U). With LeuPNA as the substrate, the total activities of the CEs from octopus HP and cuttlefish HP were higher at pH 6 than at pH 9. However, there was no difference in total activity between pH 6 and 9 for squid HP CE with LeuPNA as the substrate. These results suggest that the octopus HP is superior to the cuttlefish HP and squid HP as a potential resource for extracting exopeptidases. Exopeptidases from octopus HP have potential industrial applications and their use might aid in reducing pollution related to the octopus industry.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.8
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• pp.1022-1030
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• 2007

For the improvement on the quality and functionality of red tanner crab cooking drip, the preparation of hydrolysates from red crab cooking drip using commercial enzymes (Alcalase, Flavourzyme, Neutrase and Protamex) was attempted and its taste, nutritional and functional characteristics were also investigated. According to the results of heavy metal contents and proximate composition, red tanner crab cooking drip (RTCCD) could be used as a food resource. From the results of the trichloroacetic acid soluble index (TSI), angiotensin I converting enzyme (ACE) inhibiting activity and antioxidative activity, RTCCD hydrolysates incubated with Alcalase for 2 hrs was superior to the other one-step hydrolysates. There were no differences in the ACE inhibiting activity and antioxidative activity between one-step hydrolysates, which was incubated with Alcalase for 2 hrs, and two-step hydrolysates sequentially incubated with Alcalase and other enzymes. Alcalase-treated hydrolysates was similar in proximate composition and Hunter color value, while high in free amino acid content compared with crab cooking drip. Total amino acid content of Alcalase-treated hydrolysates was 11.9 g/100 mL and the major amino acids were glutamic acid (10.2%), proline (10.1%) and glycine (10.7%).

• Journal of KIISE:Computer Systems and Theory
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• v.30 no.10
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• pp.523-532
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• 2003

Video on Demand(VOD) services cause high resource consumption in a video seuer, because multimedia are characterized by continuous playback, a high bandwidth requirement, and long playback duration. Patching has been proposed to save the network I/O bandwidth of a video server. To achieve true VOD, patching uses multicasting to share video streams, thereby providing immediate VOD services to users without any service latency. A communication channel is used to either multicast the entire video as a regular channel or multicast only the leading portion of a video as a Patching channel. This paper Proposes a buffering patching technique that divides regular channels, as used in patching, into sub-regular channels and regular channels to shorten the holding time of the channels. In the proposed technique, the last portion of video data, corresponding to the size of the buffering window, is not transferred by sub-regular channels, but rather downloaded and buffered in the user buffer from the latest regular channel. When simulations were performed to compare the performance of the proposed technique with that of conventional patching, the results indicated that the proposed technique was superior in terms of the defection rate, average service latency, and fairness, although the amount of video data buffered at each user station was higher than that with patching.

• The KIPS Transactions:PartA
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• v.8A no.4
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• pp.319-330
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• 2001

In virtual memory system, when a process attempts to access a page that is not resident in memory, the system generates and handles a page fault that causes unpredictable delay. So virtual memory system is not appropriate for the real-time system, because it can increase the deadline miss ratio of real-time task. In multimedia system, virtual memory system may degrade the QoS(quality of service) of multimedia application. Furthermore, in general-purpose operating system, whenever a new task is dynamically loaded, virtual memory system suffers from extensive page fault that cause transient overloading state. In this paper, we present efficient overloading control mechanism called RBPFH (Rate-Based Page Fault Handling). A significant feature of the RBPFH algorithm is page fault dispersion that keeps page fault ratio from exceeding available bound by monitoring current system resources. Furthermore, whenever the amount of available system resource is changed, the RBPFH algorithm dynamically adjusts the page fault handling rate. The RBPFH algorithm is implemented in the Linux operating system and its performance measured. The results demonstrate RBPFH\`s superior performance in supporting multimedia applications. Experiment result shows that RBPFH could achieve 10%∼20% reduction in deadline miss ratio and 50%∼60% reduction in average delay.

• Korean Journal of Remote Sensing
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• v.25 no.4
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• pp.311-320
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• 2009

This study was carried out to estimate forest biomass and to produce forest biomass thematic map for Muju county by combining field data from the 5$^{th}$ National Forest Inventory (2006-2007) and satellite data. For estimating forest biomass, two methods were examined using a Landsat TM-5(taken on April 28th, 2005) and field data: multi-variant regression modeling and t-Nearest Neighbor (k-NN) technique. Estimates of forest biomass by the two methods were compared by a cross-validation technique. The results showed that the two methods provide comparatively accurate estimation with similar RMSE (63.75$\sim$67.26ton/ha) and mean bias ($\pm$1ton/ha). However, it is concluded that the k-NN method for estimating forest biomass is superior in terms of estimation efficiency to the regression model. The total forest biomass of the study site is estimated 8.4 million ton, or 149 ton/ha by the k-NN technique.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.11 no.6
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• pp.638-644
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• 2018

Relay systems have recently gained attentions because of its capability of cell coverage extension and the power gain as the one of key technologies for 5G. Relays can be exploited for small-cell base stations and the autonomous network, where communication devices communicate with each other cooperatively. Therefore, the relay technology is expected to enable the low power and large capacity communication. In order to maximize the benefits of using a limited number of relays, the efficient relay selection method is required. Especially, when two nodes exchange their data with each other via relay, the relay selection can maximize the average data rate by the spatial location of the relay. For this purpose, the average data rate is analyzed first according to the relay selection. In this paper, we analyzed the average data rate when two nodes exchange their data via dual-hop decode and forward relaying considering the interference by the concurrent transmission under Nakagami-m fading channel. The correctness of the analysis is verified by the Monte Carlo simulation. The results show that the concurrent transmission is superior to the non-concurrent transmission in the high required data rate region rather than in the low required data rate region.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.8
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• pp.102-110
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• 2019

Today's professional sports teams are in a highly competitive environment with no prospects in sight. A that was considered the favorite to win a championship can suffer from a severe slump, a team that was expected to be at the bottom can achieve victory. This unexpected situation is continuing to repeat. It is also a sign of the need to look at the use of human resources and strategies in the sports industry. Accordingly, this study looks at Daegu FC soccer team, Korea's first team for citizens. A case study on human resources innovation was done. This study introduces an argument for ordinary resources (AOR) from Frey et al. (2015) for a theoretical review and a case analysis of domestic professional football. This study determines the direction of how Daegu FC should proceed. The results of the research are as follows: first, the success of harmonizing strategic and mundane resources, and second, belief in coaches. The main contribution of this research is that it presents the importance of human resources, which is one of basic tactics that sports teams should utilize. In the sports industry, where the temporality is underlined for its clear beginning and ending, teams are more likely to use diverse sports tactics to obtain superior grades, which enriches the basis of their tactics.

• ANNALS OF ANIMAL RESOURCE SCIENCES
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• v.30 no.4
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• pp.165-171
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• 2019

The objective of this study was to investigate the effects of gender on meat quality traits and sensory characteristics of pork loin. A total of 90 pork carcasses (180 days old, 45 barrows and 45 gilts, each gender group was consisted of fifteen 1+, 1 and 2 carcass grades) were selected and loin cuts were excised to investigate meat quality, electronic tongue measures and sensory panel test. There were significant differences in drip loss (1.66% vs 1.21%), released water (12.19% vs 10.68%) and cooking loss (23.67% vs 21.04%) between loins from barrow and gilt (p<0.05). However, no significant differences in meat color (CIE L^* a^* b^*) and shear force were observed between gender groups (p>0.05). Umami and richness values of barrow were significantly higher than those of gilt, while barrow had significantly lower sourness value compared to gilt(p<0.05). On the sensory evaluation, barrow scored higher in flavor, juiciness and tenderness both, and as a result, barrow (5.51 points) also scored significantly higher than gilt (4.86 points). These results suggest that the umami intensity and sensory taste of barrow loin are superior to gilt loin due to its high water-holding capacity.