• 농업과학연구
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• 제50권3호
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• pp.349-356
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• 2023

Garlic powder (GP) was supplemented in the diet to assess the growth efficiency, nutritional retention, and fecal score of growing pigs. In total, 80 growing pigs ([Yorkshire × Landrace] × Duroc) were arbitrarily allotted (22.04 ± 0.56 kg primary average body weight) to two different trial groups with eight repetitions (three males and two females) in each pen for the 42-day trial. The dietary treatment consisted of control (CON, basal diet), which included 0.2% GP (TRT1). Growing pigs fed the GP diet exhibited an increase (p < 0.05) in body weight on day 42 and a lower (p < 0.05) overall feed conversion ratio compared to the CON pigs; however, the average daily gain and feed intake showed no difference (p > 0.05). Additionally, nutrient utilization of dry matter was greater (p < 0.05) in the GP-supplemented diet group than in the CON group. The feeding methods did not adversely affect the nitrogen and energy utilization and the fecal score significantly (p > 0.05). In summary, growing pigs fed the GP diet showed increased growth and nutritional utilization, and no adverse impact on the fecal score; thus, it could be utilized as a stimulant for improved growth performance.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권2호
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• pp.522-541
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• 2016

Network virtualization provides an effective way to overcome the Internet ossification problem. As one of the main challenges in network virtualization, virtual network embedding refers to mapping multiple virtual networks onto a shared substrate network. However, existing heuristic embedding algorithms evaluate the embedding potential of the nodes simply by the product of different resource attributes, which would result in an unbalanced embedding. Furthermore, ignoring the hops of substrate paths that the virtual links would be mapped onto may restrict the ability of the substrate network to accept additional virtual network requests, and lead to low utilization rate of resource. In this paper, we introduce and extend five node attributes that quantify the embedding potential of the nodes from both the local and global views, and adopt the technique for order preference by similarity ideal solution (TOPSIS) to rank the nodes, aiming at balancing different node attributes to increase the utilization rate of resource. Moreover, we propose a novel two-stage virtual network embedding algorithm, which maps the virtual nodes onto the substrate nodes according to the node ranks, and adopts a shortest path-based algorithm to map the virtual links. Simulation results show that the new algorithm significantly increases the long-term average revenue, the long-term revenue to cost ratio and the acceptance ratio.

• 농업과학연구
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• 제51권1호
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• pp.53-61
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• 2024

A total of 180 21-day-old weaning pigs ([Yorkshire × Landrace] × Duroc) with an initial body weight of 6.44 ± 0.01 kg were randomly assigned to 9 treatments for evaluating the effects of replacing dietary inorganic copper (Cu) and zinc (Zn) with glycine (Gly) or methionine (Met)-chelated Cu and Zn on growth performance and nutrient digestibility. The experimental period was 35 days. There were four replicated pens per treatment, with five pigs (three males and two females) per pen. Dietary treatments consisted of a basal diet (CON), in which the sources of Cu and Zn were in inorganic form. The inorganic Cu and Zn in the basal diet were replaced by glycine-chelated (GC) and methionine-chelated (MC) Cu and Zn by 30, 50, 70, or 100% to form the GC1, GC2, GC3, GC4, or MC1, MC2, MC3, MC4 groups. The 100% replacement of dietary inorganic Cu and Zn with GC or MC increased (p < 0.05) average daily gain, average daily feed intake, and gain-to-feed ratio. The complete replacement of dietary inorganic Cu and Zn with GC or MC led to enhanced (p < 0.05) digestibility of dry matter, nitrogen, Cu and Zn. Thus, the replacement of inorganic Cu and Zn with GC or MC can improve the growth efficiency and nutrient utilization of weaning pigs.

• 가족자원경영과 정책
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• 제17권1호
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• pp.159-178
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• 2013

This study aims to evaluate the retirement income readiness of Korea, a country that-considering its high property asset ratio-is seeing an unprecedented rapid progression of graying. The result of analyzing 6,589 non-retired households in Statistics Korea's Survey of Household Finances (2011) is as follows. First, the Retirement Readiness Index, considering annual income and asset utilization income before including longevity risk, was 70.6. The index increased to 89.5 when utilizing real assets excluding houses and exceeded 100 when utilizing houses. Second, when designating 100 to be the life expectancy and taking into consideration longevity risk, there results were 52.5, 63.7, and 81.1, respectively. Third, since it is less likely for one to use all current financial assets as post-retirement income, the study reviewed the changes in the Retirement Readiness Index by applying three different levels of asset utilization ratios (50%, 75%, and 100%), which refer to the conversion ratios of current assets to retirement assets. This study is significant in that it considers longevity risk and applies asset utilization ratios in various ways, outside of the assumption that all current financial assets will be used as post-retirement income, to take a more realistic approach to retirement readiness.

• 정보처리학회논문지C
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• 제12C권6호
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• pp.891-900
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• 2005

본 논문에서는 대용량 WDM 광통신망에서 장애가 발생하였을 경우 이를 효율적으로 복구할 수 있는 기법에 대해 연구하며, 특히 보다 적은 통신망 자원을 이용해 높은 복구율을 얻을 수 있도록 복구 기술의 효율성을 극대화하는 것을 연구의 중점 목표로 한다. 복구 방법의 효율성은 목표로 하는 복구율을 얻기위해 필요한 예비 자원의 양에 의해 결정되며, 효율성을 높이기 위한 기본적인 방법은 예비 자원의 공유이다. 이를 위해서 복구용 대역폭의 공유뿐만 아니라 복구 경로의 공유를 통해 자원 이응의 효율성을 증가시킬 수 있는 기법을 제안한다. 제안된 기법은 논리적인 다중 링 구조에 의한 통신망 복구 기법으로 링 토폴로지의 특성을 이용해 빠르고 간단한 복구 동작을 제공하며, 동시에 다중 링 구성을 통하여 대체 경로의 분산과 공유 정도를 높이고 단위 링크당 예약되어야 하는 예비 광파장의 수를 줄임으로써 전체 통신망 자원 이용의 효율성을 높일 수 있다. 성능 분석 결과 제안된 기법은 목표로 하는 복구율을 보장하는 동시에 통신망 자원 이용의 효율성을 크게 증가시킴을 확인할 수 있었다.

• 한국통신학회논문지
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• 제29권9A호
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• pp.1067-1074
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• 2004

무선 이동 통신에서 정점 증가하는 멀티미디어 응용에 대한 QoS(Quality of-Service) 제공운 무엇보다 중요하다. 비록 유선망에서의 QoS 는 서비스 허가 제어 (admission control)나 자원 할당 기법으로 어느 정도 쉽게 제공될 수 있었지만, 무선망에서의 QoS 제공은 단말의 이동성과 자원의 한정성으로 인하여 유선망과 비교하여 더욱 복장 하다 즉 , 한정적인 자원을 효율적으로 관리하여 멀티미디어 응용에 대한 QoS 를 제공하는 것이 중요하다 복 논 문에서는 무선망에서의 멀티미디어 트래역을 위한 QoS 보장 알고리즘을 제안하였다 제안된 알고리즘은 이동단말 이 위치한 주위 생의 자원들을 미리 예약하는 방식과 자원 재할당 기엽을 혼합하여 시용하며, 새로운 호의 차단률 (blocking rate), 핸드오프 호의 드랍률 (blocking rate), 대역폭의 활용성 (bandwldth utilization) 을 향상시켜 멀티 미디어 트래픽에 QoS 를 제공하고 있다.

• 정보처리학회논문지C
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• 제9C권2호
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• pp.283-292
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• 2002

본 논문에서는 무선/이동 인터넷 환경에서 실시간 트래픽의 QoS 보장을 위한 자원 관리 기법에 대해서 연구한다. 이동단말은 이동성때문에 실시간 응용 서비스에서 요구하는 QoS에 중요한 영향을 갖는다. 현재 제안된 MRSVP는 자원 예약 지역 경계의 불명확성과 또한 세션들을 유지하기 위한 신호 과부하를 발생시킬 수 있다. 이러한 문제를 해결하기 위해, MRSVP[1-5]와 이동 클러스터 개념을 조합한 신규자원 예약 프로토콜-이동클러스 기반의 H-MRSVP(Hierarchical MRSVP)-을 제안한다. 본 논문에서는 실시간 이동 호에 대한 이동 클러스터 기반의 H-MRSVP의 분석적인 모델을 설계하고, 시뮬레이션을 이용하여 보호채널 할당 방식, 분산 호 수락제어 기법과 비교 분석한다. 성능 목표값으로는 신규호 차단율, 핸드오프 호 손실율, 무선 시스템에서이 채널 이용율과 호의 서비스 완료율을 보았다. 결과적으로 제안된 기법이 DCA보다는 채널 이용율 측면에서 좀더 유연하고, 보호채널기법보다는 이동호에 대한 좋은 채널 할당을 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권11호
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• pp.5234-5251
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• 2018

It is well-known that virtualization technology can bring many benefits not only to users but also to service providers. From the view of system security and resource utility, higher resource sharing degree and higher system reliability can be obtained by the introduction of virtualization technology in distributed cloud. The small size time-sharing multiplexing technology which is based on virtual machine in distributed cloud platform can enhance the resource utilization effectively by server consolidation. In this paper, the concept of memory block and user satisfaction is redefined combined with user requirements. According to the unbalanced memory resource states and user preference requirements in multi-virtual machine environments, a model of proper memory resource allocation is proposed combined with memory block and user satisfaction, and at the same time a memory optimization allocation algorithm is proposed which is based on virtual memory block, makespan and user satisfaction under the premise of an orderly physical nodes states also. In the algorithm, a memory optimal problem can be transformed into a resource workload balance problem. All the virtual machine tasks are simulated in Cloudsim platform. And the experimental results show that the problem of virtual machine memory resource allocation can be solved flexibly and efficiently.

• 자원리싸이클링
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• 제29권6호
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• pp.15-26
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• 2020

최근 미세플라스틱의 발생 측면에서 폐플라스틱의 친환경적 처리에 대한 관심이 증대하고 있다. 이에, 폐플라스틱의 재활용이 폐기물 간소화, 이산화탄소 배출 감소 및 부가가치 제품 재생산의 이점을 제공하기 때문에 매우 중요하다고 할 수 있다. 특히, 친환경적인 폐플라스틱의 재활용을 위해서는 물리적 선별방법을 통해야 하며, 그 중에서도 폐플라스틱내의 재질별 분리가 가능한 부유선별이 물질재활용 측면에서 매우 효과적인 분리방법으로 잘 알려져 있다. 따라서, 본 총설에서는 혼합 폐플라스틱의 효과적인 재질 분리를 하기 위한 부유 선별의 연구 동향을 조사하였다. 추가적으로 보고된 연구결과들을 통하여 플라스틱의 원재료인 폴리머로부터 기능성 신소재로서의 활용에 대한 접근방법을 요약 정리하였다.

• 유통과학연구
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• 제14권11호
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• pp.75-82
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• 2016

Purpose - In order for actively pursuing medium and long term policies of Gangwon region to be effectively and efficiently driven, efficacious and practical development strategies are needed. In terms of regional revitalization in most regions that are dependent on the primary industry like Gangwon-do Province, the maintaining of local community becomes difficult and there are limitations on the support from the central government and local governments. Therefore, local communities need to implement measures not only to be financially independent but also maintain and activate themselves. And community business can be adopted to be a proper strategy to cope with this change. This study drew importance of a community business model appropriate for Gangwon-do region to figure out success factors. Research design, data, and methodology - This study aimed to come up with importance of community business model for Gangwon-do region by using AHP Method. AHP Method, which was developed by Professor Saaty in 1970', is a methodology to simplify complex problems for a rational decision making. A survey targeting related public officials and expert group was carried out and a total of 30 questionnaires were collected for the analysis. Results - Analysis model used in this study was to prioritize community business models of Gangwon-do region. The second hierarchy was divided according to local restoration type, local resource utilization type, environment improvement type, and life support type. The third hierarchy consisted of 5 items such as network, the middle structure, program, government support, and human resources to measure each importance. As a result, in the second hierarchy, local resource utilization type had the highest importance. In the third hierarchy, the middle structure had the highest importance, followed by government support, program, network, and human resources. Collectively, the results suggested that important critical factors of community business model of Gangwon-do region was the importance of local resource utilization model and the middle structure. Conclusions - Not only should projects that are already operating in the region but next community business projects that are planning in the Gangwon-do region should be practically operated in view of the importance and the models derived from this study.