본 연구는 적심이 감초의 생육 및 수량에 미치는 영향을 구명코자 2008년부터 2009년까지 2년간 충북농업기술원에서 수행하였다. 적심 처리시기에 따라 6월 30일(JUN), 7월 30일(JUL), 8월 30일(AUG), 무적심(대조구) 등 4처리를 하였으며, 적심량은 줄기 길이의 20%를 제거하였다. 본 연구의 결과는 다음과 같이 요약할 수 있다. (1) 초장과 분지수는 적심처리구보다 대조구에서 우수하였으며, 경엽중은 적심시기가 빠를수록 무거웠다. (2) 초장과 줄기 직경은 적심 시기에 따른 영향을 받지 않았다. (3) 지표면의 포복경 생장에는 일정한 경향이 없었다. (4) 본 실험에서 적심이 뿌리 생장을 유도하고, 조기 적심이 뿌리 생육을 촉진하였다. (5) 근중은 대조구 2년생 238 kg/10a에 비해 JUN 처리구와 JUL 처리구에서 각각 11~30% 증가하였으며, 3년생은 대조구 432 kg/10a에 비해 6~11% 증가하였다.

This study was carried out to elucidate the effects of mulching materials on the growth of potato and weed control at the experimental farm of Chungbuk National University from August 9 in 2008 to June 28 in 2009. Tested potato, cv. ‘Superior’, was grown under the different mulching materials such as pine tree leaf, oak tree leaf, rice straw, rice hull and sawdust, and control(non-mulching). We tested two times with autumn and spring culture season. The obtained results from this study were summarized as follows; There was significantly difference in plant height, stem length, leaf length, leaf weight and tuber weight in pine tree leaf mulching treatment in autumn season among the treatments. The dominant weeds were Echinochioa crus-galli var. fadmerntacca and Cyperus amvuricus in autumn culture season, while were Echinochioa crus-galli var. fadmerntacca and Digitaria sanguinalis in spring culture season. The appearance of weeds in all of mulching treatment was significant reduced compared to control. The soil moisture content was the highest in rice hull mulching treatment, and that of mulching treatments was significantly higher than control. The soil temperature of mulching treatments was lower than that of control by from 1.0℃ to 2.8℃ in autumn season and from 0.7℃ to 2.3℃ in spring season. The soil temperature was low in the order of pine tree leaf, rice straw, oak tree leaf, rice hull, sawdust, and control.

This study was carried out to evaluate the effects of applying levels of organic liquid fertilizer (OLF) on growth and fruit quality of hot pepper. The OLF was made with compositions of chicken dung : rice bran : soybean meal (2:1:1). Hot pepper was applied with 5 treatments; control (chemical fertilize), OLF-1.0X (standard applying levels), OLF-0.7X (70% of standard applying level), and OLF-1.3X (130% of standard applying level). The plant height was reduced at 23cm in the OLF-1.0X treatment compared to control of 293㎝. The number of hot pepper fruits was significantly increased. The content of capsaicin in the ripened pepper decreased by 23.6% in the OLF-1.0X treatment with 253㎎ㆍ㎏⁻¹ compared with control of 331 ㎎ㆍ㎏⁻¹, but the content of free sugar increased by 19.5%. The content of capsaicin and soluble solid content in OLF-1.3X treatment were significant different with other treatments. The yield of red pepper in OLF-1.0X treatments increased by 15% with 4,190㎏ㆍ10a⁻¹ compared to control of 3,643㎏ㆍ10a⁻¹, and OLF-1.3X and OLF-0.7X treatments showed increase by 10% and 6%, respectively.

Eleuthero(Eleutherococcus senticosus Maxim.) cortex is well known as a herb medicine for tonic. This study was performed to improve the quality of dried E. senticosus cortex. Investigation of quality factor and contents of efficient compounds under different steaming times and drying methods were performed to determine the proper processing and drying conditions of Eleuthero cortex harvested on March in annual stems. The proper steaming time for peeling bark to make high quality Eleuthero cortex took less than 20 mins. Eleutheroside B and E contents among drying methods were significantly different at 5% level DMRT. The 50℃ heat drying was the most advisable condition for drying, when drying and keeping contents of effective compounds.

The present study was carried out to evaluate the effects of organic liquid fertilizer (OLFs) fertigation on the growth and fruit quality of hot pepper (Capsicum annuum L.) cv. ‘Nokkwang (Seminis Korea)’. Treatments were given with control (chemical feritilzer), OLF Ⅰ(fowl dropping : fish meal : soybean meal, 2:1:1), OLF Ⅱ(fowl dropping : bone meal : soybean meal, 2:1:1), OLF Ⅲ(fowl dropping : bone meal, 1:1), and OLF Ⅳ(fowl dropping : rice bran : soybean meal, 2:1:1). The composition ratio of OLF based on weight to weight. The pH and EC of OLFs according to different material and compositions ranged from 6.5 to 6.8, and from 2.91 to 3.69dS · m-1, respectively. The C/N ratio was the highest as 5.75 in OLF Ⅳ, and there was no difference among the treatments in C/N ratio of the exception of OLF Ⅳ. In OLF Ⅳ total fruit weight was the highest as 1,558g per plant and total fruit number increased as 23.7% compared to control. The content of capsaicin in the ripened pepper increased with OLF Ⅰ and Ⅱ treatments, and decreased with OLF Ⅲ and Ⅳ treatments compared to control of 662mg ․ kg-1, but the soluble solid content was the highest with OLF Ⅳ treatment as 10.0°Brix.

치커리의 종근으로 치콘을 재배하여 엽색이 노란색과 붉은색인 다섯 가지 종류의 치콘 추출물에 대한 항산화효과 및 혈당강하효과와 단백분해능을 측정하였다. DPPH free radical 소거능으로 항산화활성을 측정한 결과, 실험에 사용한 모든 시료가 우수한 항산화 활성을 가지고 있었으며 특히, 엽색이 노란색인 네 종류 (Kibora, Metafora, Vintor, Halifax)의 치콘보다 엽색이 붉은색인 Redoria종이 1 mg/mL의 농도에서

The mushroom Agrocybe chaxingu was analyzed to evaluate the nutritional value of this potential food. The moisture content was 88.9% in the fruiting body of A. chaxingu, and the proportions of ash, crude fiber, carbohydrate, crude protein, and crude fat were 0.9%, 1.4%, 7.2%, 2.5% and 0.4% by weight, respectively. A. chaxingu contained 1.29 mg/100 g edible weight of vitamin , and the contents of vitamin , vitamin , and vitamin C were 0.15 mg, 0.32 mg, and 18.4 mg per 100 g of wet mushroom. Potassium (3,318 mg/100 g, dry basis) was found at the highest concentration in A. chaxingu. In addition, the mushroom contained many other minerals (all figures are mg per 100 g of dried mushroom) such as phosphorus (909.7), magnesium (141.3), sodium (12.7), zinc (7.4), iron (6.5), copper (2.8), manganese (0.8), and nickel (0.1). The results indicate that A. chaxingu is a valuable nutrient source.

온라인게임 마케팅의 가격정책은 정액선불제와 PC방의 종량제가 대표적이다. 이 두 모델은 대부분의 온라인게임기업 및 MMORPG의 기본 과금방식으로 인식되어 왔으나 점차 선두기업만의 수익구조로 정착되고 있다. 선두기업들의 시장 점유율이 80%를 넘어선 상황에서 후발기업들이 동일한 과금방식을 적용할 경우 경쟁은 불가능해진다. 시험평가에서 호평을 받은 후발 MMORPG 들이 상용화의 벽을 넘지 못하고 도산하고 있는 예가 이를 증명해준다. 후발업체들은 생존과 고객확보차원에서 먼저 무료게임을 선언하고, 이후 아이템의 판매와 경험치, 게임 머니의 배수 서비스로 유도하기도 한다. 그러나 유무료 고객 간의 분쟁을 낳고, 정액제를 기반으로 제작한 게임 콘텐츠의 밸런스가 붕괴되어 게임의 생명을 단축하는 결과로 이어지고 있다. 후발업체의 안정된 수익과 시장진입을 위해서는 기획 단계부터 콘텐츠에 맞는 과금 방식을 설계해야 하며 또 선두업체들과는 차별화된 과금방식을 확보해야한다. 본 연구에서는 단순 아이템 판매와 배수 서비스가 아닌 게임 콘텐츠를 기반으로 하는 다양한 콘텐츠 서비스를 분류하였다. 그리고 이들 콘텐츠를 저가로 책정함으로써 이용고객들의 소액결재를 유도하는 콘텐츠 프리미엄 서비스를 제안하였다. 이는 현재 게임 시장에서 후발 MMORPG 게임 업체의 새로운 과금방식으로 적용될 수 있을 것으로 기대된다.

인터넷의 확장과 고속망에도 불구하고 MMORPG와 같이 대용량 멀티미디어 서비스의 요구수준은 통신 기반구조 이상을 요구하기도 한다. 본 논문에서는 MMORPG 트래픽에 대응하여 멀티캐스트 프로토콜인 CBT를 분석하고, 코어라우터의 병목현상 발생시 Anycast로의 전환을 제안하였다. 시뮬레이션 모델에서는 멀티캐스트 그룹 수와 멤버 수를 설정하고 Anycast 라우팅의 종단간 게임팻킷 지연시간을 측정하였으며 CBT 및 PIM-DM 비교하였다. 결과적으로, 128바이트, 512바이트, 1K 바이트의 게임 패킷에 대하여 Anycast 라우팅은 각각 PIM-DM 대비 8.7%, 25.5%, 34.0%와 CBT 대비 38.6%, 51.8%, 56.6%의 평균지연시간 개선을 보였다. CBT/Anycast 전략은 MMORPG트래픽의 지연특성 개선으로 안정적인 서비스가 가능하다.

The deployment of multicast communication services in the Internet is expected to lead a stable packet transfer even in heavy traffic as in On-Line Game environment. The Core Based Tree scheme among many multicast protocols is the most popular and suggested recently. However, CBT exhibit two major deficiencies such as traffic concentration or poor core placement problem. So, measuring the bottleneck link bandwidth along a path is important for understanding the performance of multicast. We propose not only a definition of CBT's core link state that Steady-State(SS), Normal-State(NS) and Bottleneck State(BS) according to the estimation link speed rate, but also the changeover of multicast routing scheme for traffic overload. In addition, we introduce anycast routing tree, a efficient architecture for construct shard multicast trees.

Multicast protocols are efficient methods of group communication such as video conference, Internet broadcasting and On-Line Game, but they do not support the various transmission protocol services like a reliability guarantee, FTP, or Telnet that TCPs do. The Purpose or this Paper is to find a method to utilize multicast routers can simultaneously transport multicast packets and TCP packets. For multicast network scalability and error recovery the existing SRM(Scalable Reliable Multicast)method has been used. Three packets per TCP transmission control window site are used for transport and an ACK is used for flow control. A CBR(Constant Bit Rate) and a SRM is used for UDP traffic control. Divided on whether a UDP multicast packet and TCP unicast packet is used simultaneously or only a UDP multicast packet transport is used, the multicast receiver with the longest delay is measured on the number of packets and its data receiving rate. It can be seen that the UDP packet and the TCP's IP packet can be simultaneously used in a server router.