• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.649-652
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• 2015

Previous marking policy for the AF service of TCP traffic in the Diffserv network have no sufficient consideration on the effect of RTT and target rate. In this paper, in order to improve fairness Index by the effect RTT difference of TCP traffic, we propose the modified TSW3CDM(Time Sliding Window Three Color Dynamic Marker) based on average transfer rate estimation and the flow state. The proposed algorithm is dynamic marking policy that do allocate band width in proportion to transmission rate. To evaluate the performance of the proposed algorithm, We accomplished a computer simulation using NS-2. From simulation results, the proposed TSW3CDM algorithm improves fairness index by comparison with TSW3CM.

• The Korea Journal of Herbology
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• v.23 no.3
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• pp.19-25
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• 2008

Objectives : This study was performed to evaluate the neuroprotective effect of water extracts from Thujae Semen(TSW) in PC12 cells. Methods : We performed 2,2-diphenyl-2-picrylhydrazyl(DPPH) radical scavenging assay, 2,2-azinobis- (3-ethyl-benzothiazoline-6-sulfonic acid(ABTS) cation scavenging assay, and determination of total polyphenolic content to examine the antioxidant effects of TSW. We also carried out 3-(4,5- dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay(MTT), reactve oxygen species(ROS) assay, and nitric oxide(NO) assay to examine neuroprotective effects against 6-hydroxydopamine(6-OHDA) in PC12 cells. Results : TSW showed $IC_{50}$ values of 404.3 and 219.9 ${\mu}g/mL$ in DPPH and in ABTS assays, respectively. TSW showed 9.74 ${\mu}g/mL$ of total polyphenol contents. TSW incresed cell viability in a dose dependent manner and it showed protective effect against 6-OHDA neurotoxicity at the concentration of 25-200 ${\mu}g/mL$. Moreover, it recovered 6-OHDA induced cell death at the same concentrations. The extract showed a dose dependent reduction of ROS and NO generation by 6-OHDA. Conclusions : We concluded that TSW has neuroprotective effect against 6-OHDA-induced toxicity in PC12 cells through ROS and NO inhibition.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.147-151
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• 2002

One of the main issues in Diffserv AS architecture is guaranteeing fairness among the flows which have their own QoS requirements. Because the methodology of resource allocation and traffic conditioning would affect the end-to-end QoS and backbone link utilization. In this paper, we propose a variant of TSW algorithm for enhancing fair bandwidth allocation and link utilization and presents performance evaluation between TSW & TS2W3C through NS-2 Simulations.

• The KIPS Transactions:PartC
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• v.9C no.5
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• pp.743-748
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• 2002

In recent research for the Internet, many studies have investigated the Diffserv AS architecture that can provide Quality of Service. However, this architecture still lacks the qualification to provide full use of the bandwidth to the customer In this paper, we propose the TS2W3C (Time Sliding Two Window Three Color) marking algorithm to improve the fair share of bandwidth by enhancing the TSW (Time Sliding Window) marking algorithm. Our proposed mechanism provides the bandwidth relatively more fairly than the TSW mechanism.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10c
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• pp.670-672
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• 2003

인터넷의 발전으로 인하여 여러 가지 서비스가 가능하게 되었고, 이러한 서비스들은 서로 다른 서비스 품질(QoS)이 요구된다. 따라서 이러한 QoS를 제공하기 위해 차별화 서비스(Differentiated Service)의 연구가 진행되고 있다. 이 논문에서는 차별화 서비스중 보장형 서비스에서 공평성에 관한 문제로 지적되고 있는 bandwidth skew problem의 문제를 최소화하기 위한 기법을 제시한다. 이 논문에서는 bandwidth skew problem의 현상을 확인하고 제안한 기법이 기존의 기법보다 공평성 측면에서 개선된 성능을 제공함을 보였다.

• The Plant Pathology Journal
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• v.34 no.1
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• pp.71-77
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• 2018

Resistance to Tomato spotted wilt virus isolated from paprika (TSWV-Pap) was overcome at high temperatures ($30{\pm}2^{\circ}C$) in both accessions of Capsicum annuum S3669 (Hana Seed Company) and C. chinense PI15225 (AVRDC Vegetable Genetic Resources). S3669 and PI15225, which carrying the Tsw gene, were mechanically inoculated with TSWV-Pap, and then maintained in growth chambers at temperatures ranging from $15{\pm}2^{\circ}C$ to $30{\pm}2^{\circ}C$ (in $5^{\circ}C$ increments). Seven days post inoculation (dpi), a hypersensitivity reaction (HR) was induced in inoculated leaves of PI152225 and S3669 plants maintained at $25{\pm}2^{\circ}C$. Meanwhile, necrotic spots were formed in upper leaves of 33% of PI15225 plants maintained at $30{\pm}2^{\circ}C$, while systemic mottle symptoms developed in 50% of S3669 plants inoculated. By 15 dpi, 25% of S3669 plants had recovered from systemic mottling induced at $30{\pm}2^{\circ}C$. These results demonstrated that resistance to TSWV-Pap can be overcome at higher temperatures in both C. chinense and C. annuum. This is the first study reporting the determination of temperatures at which TSWV resistance is overcome in a C. annuum genetic resource expressing the Tsw gene. Our results indicated that TSWV resistance shown from pepper plants possess the Tsw gene could be overcome at high temperature. Thus, breeders should conduct evaluation of TSWV resistance in pepper cultivars at higher temperature than $30^{\circ}C$ (constant temperature).

• Journal of KIISE:Information Networking
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• v.29 no.4
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• pp.358-367
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• 2002

The IETF Differentiated Services (Diffserv) WG focused on Providing service differentiation on the Internet. One problem of the Diffserv Assured Services (AS) architecture is that it cannot guarantee fairness and throughput assurance. In this paper, we propose two schemes for guaranteeing fairness among the various target rates in the AS architecture. One is a variant of RED with IN and OUT (RIO), called the improved RIO (IRIO). The other is a variant of Time Sliding Window (TSW), called the improved TSW (ITSW). To validate the Proposed schemes, their behaviors are then examined under various simulation environments. The simulation results showed that IRIO and ITSW improved fairness and the throughput assurance in the AS architecture.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.4
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• pp.552-558
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• 2002

Differentiated services (DiffServ) architecture defines a new framework for the support of quality of service (QoS) in IP-based networks. RIO has received the most attention among all the active queue management mechanisms proposed for assured service in DiffServ environment. The paper proposed the enhanced RIO which could alleviate the impact of flow's packet sire on the realized throughput. The simulation results indicate that this mechanism, when combined with TSW as traffic conditioner, provide better throughput assurance and fair distribution of excess bandwidth independent of packet size of flows in case of well-provisioned network environment.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.508-510
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• 2001

동영상을 효율적으로 압축하기 위한 움직임백터 예측에 관한 많은 연구가 진행되어 왔다. 가장 일반적인 FBMA(Full search-based Block Matching Algorithm)는 화질은 좋지만 계량이 많기 때문에 실시간 인코딩을 요구하는 시스템에서 사용하는데 문제가 있다. 좋은 화질을 유지하면서 인코딩 속도를 해결하기 위한 많은 알고리즘들이 제안되어 왔지만 ASIC이나 소형 시스템에서 사용할 수 있는 방법이 계속 요구되고 있다. 본 논문에서는 계산량을 더욱 줄여 속도향상을 위한 방법인 TSWS(Two-Step search With Subsampling method) 제안하였다. TSWS는 블록정합알고리즘에 기반을 두고 있으며, 서브샘플링한 값으로 움직임 벡터를 찾는다. TSWS를 사용하였을 때 기존 방법들이 제공하는 주관적 화질이나 PSNR을 어느 정도 유지하면서도 속도를 20-30% 정도 개선시킬 수 있다.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.49 no.1
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• pp.61-73
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• 2016

Water mass distribution and currents were investigated off the east coast of Korea near the Hupo Bank using the CTD and ADCP data from June to August 2010. The typical water masses were: (1) Tsushima Surface Water (TSW) from the East Korean Warm Current (EKWC) in the surface layer, (2) a shallow thermocline at 20-30 m depth, (3) Tsushima Middle Water (TMW) of high salinity (>34.2) below the pycnocline, (4) North Korean Cold Water (NKCW) of low salinity (<34.05) and low temperature (<4°C) in the lower layer. In June, a double eddy was observed in which a cold filament intruded cyclonically from the south around a pre-existing cold-core eddy. A burst of strong southward current was recorded in mid-August due to a warm filament from the meandering EKWC. Current in the N-S direction was predominant due to topographic effects, and the direction of the northward EKWC was frequently reversed in its direction due to the eddy-filament activity, whereas the influence of the wind was not noticeable. The vertical structure of the current was of a two-layer system, with the northward EKWC in the upper layer and weak southward flows corresponding to the North Korean Cold Current (NKCC) in the deeper layer.