• International Area Studies Review
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• v.18 no.3
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• pp.89-110
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• 2014

This study build an integrated model of a relationship between the supply chain orientation(SCO), the performance of a supply chain management(SCM) and an export performance in a domestic manufacturing SMEs. Twelves hypotheses including the mediating effect of the structural SCO and the customer-focused performance of SCM were analyzed on the 212 SMEs. In the result of the analysis, the strategic SCO has a positive effect on the both of the SCO and the operational performance of the SCM. The structural SCO has a positive effect on the performance of the SCM. Also, the operational performance of the SCM has a positive effect on the export performance of SMEs. In the mediating effect, the structural SCO has a fully mediating effect between the strategic SCO and the customer-focused performance of SCM. In addition, it has a partial mediating effect on the relationship of the strategic SCO and the operational performance of the SCM. The operational performance of the SCM has a fully mediating effect between the structural SCO and the customer-focused performance of SCM.

• Bulletin of the Korean Space Science Society
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• 2007.10a
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• pp.93.1-93.1
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• 2007

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2589-2591
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• 2004

SCORM은 교육용 컨텐츠를 플랫폼에 상관없이 SCO라는 객체 단위로 공유하고 재사용 하기 위한 국제적인 표준안이다. 본 논문에서는 이 SCORM 표준안을 따르는 LMS에서 SCO의 이용도를 모니터링 하는 시스템을 설계해 보았다. 이 SCO의 이용도 모니터링 결과를 통해 컨텐츠 제공자에게는 향후 SCO를 재 설계 하는데 유용한 자료로 이용될 수 있고 학습자에게는 자신이 자주 사용한 컨텐츠 객체를 알고 향후에 접근이 용이하도록 설정 할 수 있게 하는 등으로 응용될 수 있을 것이다.

• Journal of Marine Bioscience and Biotechnology
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• v.2 no.1
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• pp.55-59
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• 2007

The oil and concentrated protein powder from squid viscera was extracted and recovered by a semi-batch supercritical carbon dioxide ($SCO_2$) extraction system and the degree of oxidation in the extracted oil was measured in order to compare with extracted oils using organic solvents. The degree of storage in treated squid viscera by $SCO_2$ extraction was measured in order to compare with untreated squid viscera. As results obtained, it was found that the auto-oxidation of the oils using $SCO_2$ extraction occurred very slowly compared to the oils by organic solvent extraction. And the treated squid viscera by $SCO_2$ extraction was reached the point of initial rottenness slowly than untreated squid viscera.

• Journal of Institute of Control, Robotics and Systems
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• v.18 no.8
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• pp.731-737
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• 2012

In this paper the usage of Bluetooth in networked control systems is described. ACL links and commonly used serial port profile built on top of ACL links are analyzed and their problems such as unpredictable latency are discovered. SCO link packet scheduling, latency estimation and setup procedure are examined. SCO link is suggested as proper link for NCS, due to its low latency and low variance. Smith predictor use for latency compensation is described and its impact on control performance is estimated. A number of experiments on DC motor position control are performed and control performance of system utilizing SCO link with and without Smith predictor is proved to be higher than control performance of system utilizing ACL link.

• Journal of Microbiology and Biotechnology
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• v.26 no.9
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• pp.1650-1656
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• 2016

The SCO0284 gene of Streptomyces coelicolor A3(2) is predicted to encode an α-galactosidase (680 amino acids) belonging to glycoside hydrolase family 27. In this study, the SCO0284 coding region was cloned and overexpressed in Streptomyces lividans TK24. The mature form of SCO0284 (641 amino acids, 68 kDa) was purified from culture broth by gel filtration chromatography, with 83.3-fold purification and a yield of 11.2%. Purified SCO0284 showed strong activity against p-nitrophenyl-α-D-galactopyranoside, melibiose, raffinose, and stachyose, and no activity toward lactose, agar (galactan), and neoagarooligosaccharides, indicating that it is an α-galactosidase. Optimal enzyme activity was observed at 40℃ and pH 7.0. The addition of metal ions or EDTA did not affect the enzyme activity, indicating that no metal cofactor is required. The kinetic parameters V_max and K_m for p-nitrophenyl-α-D-galactopyranoside were 1.6 mg/ml (0.0053 M) and 71.4 U/mg, respectively. Thin-layer chromatography and mass spectrometry analysis of the hydrolyzed products of melibiose, raffinose, and stachyose showed perfect matches with the masses of the sodium adducts of the hydrolyzed products, galactose (M+Na, 203), melibiose (M+Na, 365), and raffinose (M+Na, 527), respectively, indicating that it specifically cleaves the α-1,6-glycosidic bond of the substrate, releasing the terminal D-galactose.

• Journal of Advanced Navigation Technology
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• v.6 no.1
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• pp.77-83
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• 2002

The emergence of Bluetooth as a radio interface scheme has allowed electronic devices to be instantly interconnected as ad-hoc networks. These short range ad-hoc wireless networks are called piconets, operated in the unlicensed 2.45 GHz ISM(Industrial, Scientific, Medical) band where up to eight devices may be used to configure single or overlapping piconets. In this paper, we have simulated the PER(Packet Error Rate), the ratio of received packet and payload BER(Bit Error Rate) of piconet with packet types of Bluetooth ACL/SCO(Asynchronous Connection Less/Synchronous Connection Oriented) link over wireless ad-hoc environment. The Rayleigh fading effects are considered as channel model, and the simulation results are based on the baseband model of Bluetooth specification. From the simulation results, the PER and the throughput of Bluetooth piconet are sensibly affected by the packet type of ACL/SCO link.

• KSBB Journal
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• v.22 no.3
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• pp.174-178
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• 2007

The aim of this study was to identifyisothiocyanates (ITCs) from wasabi (Wasabi japonica Matsum) using supercritical carbon dioxide ($SCO_2$) and to compare the composition in the extracts between $SCO_2$ and organic solvents extraction. A semi-continuous high pressure apparatus was used to extract wasabi (roots, stems and leaves) at following conditions pressure 80$\sim$120 bar, temperature $40\sim50^{\circ}C$. Ether, ethanol, chloroform and dichloromethane were used as organic solvents. The ITCs extracted by means of both separation technologies were analyzed by a gas chromatography system. As the results of study, AITC and ITCs were highly extracted at 40$^{\circ}C$ and 80 bar. To extract AITC from wasabi, $SCO_2$ extraction is more effective than organic solvents extraction, resulted in thermal degeneration and remaining of organic solvents.

• Journal of Oriental Neuropsychiatry
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• v.28 no.2
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• pp.123-136
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• 2017

Objectives: The objective of this study is to investigate the anti-amnesic effects of AR, Aucklandiae Radix, ground powder on scopolamine (Sco)-induced memory impairment in mice (C57BL/6) through its favorable acetylcholine (ACh) and acetylcholinesterase (AChE) activity, Choline acetyltransferase (ChAT) mRNA expression, and antioxidant effect. Methods: Six groups, a total of 20 intact or 100 Sco treated mice, were selected based on their body weights and were used in this study. Half of the mice in each group were used for the passive avoidance task test and the measurements of hippocampus ACh content, AChE activity and ChAT mRNA expression. The remaining half of the mice in each group were used for the Morris water maze test and cerebral antioxidant defense system measurement. Results: Marked decreases in step-through latency times in the passive avoidance task test and increases in escape latency times in the Morris water maze test were observed with decreases in the hippocampus ACh content and ChAT mRNA expression, and increases in the hippocampal AChE activities, as a result of Sco intraperitoneal treatment, in the present study. In addition, destruction of the cerebral cortex antioxidant defense systems was observed in Sco control mice as compared with intact vehicle control mice. However, 28 days of continuous oral pre-treatment with AR ground powder at doses of 400, 200 and 100 mg/kg markedly and dose-dependently inhibited the Sco treatment-related amnesia. Conclusions: The results prove that oral administration of AR ground powder reduces Sco-induced memory impairment. This is because it can preserve ACh, related to ChAT mRNA expression, cause AChE inhibition, and activate the cerebral antioxidant defense system.

• Journal of Oriental Neuropsychiatry
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• v.30 no.3
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• pp.221-235
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• 2019

Objectives: The purpose of this study was to confirm the anti-amnesic effects of Bunsimgieum (BSGE) through its favorable acetylcholine (ACh) and, acetylcholinesterase (AChE) activity, choline acetyltransferase (ChAT) mRNA expressions, and antioxidant effect on scopolamine (Sco)-induced memory impairment in C57BL/6 mice. Methods: Six groups, a total of 20 intact or 100 Sco-induced mice were used in this study, based on their body weight. Half of each group underwent passive avoidance tests and the measurement of hippocampus AChE activity, ACh content, and ChAT mRNA expression, The remaining half of each group underwent a Morris water-maze test and antioxidant defense system measurement as well. Results: Significant reductions in the step-through latency times from the passive avoidance test and reductions in the escape latency times from the Morris water-maze test were observed with increases of hippocampal AChE activities and, reductions in ACh contents and ChAT mRNA expression in hippocampus, as a result of Sco intraperitoneal treatment, in this study. Additionally, the increases in cerebral cortical MDA levels and, reductions in GSH contents, SOD activities, and CAT activities were demonstrated in the Sco control mice compared with the intact vehicle control mice, respectively. However, 28 days of consecutive oral pre-treatment of BSGE hot water extracts of 400, 200, and 100 mg/kg, respectively, markedly and dose-dependently inhibited Sco treatment-related amnesia. Conclusions: The results demonstrate that the oral administration of BSGE hot water extracts reduces Sco-induced memory impairment, through preserving ACh, related to ChAT mRNA expressions, causes AChE inhibition, and enhances the cerebral antioxidant defense system.