• 융합보안논문지
• /
• 제8권4호
• /
• pp.51-56
• /
• 2008

VPN(Virtual Private Network)과 DSL, 케이블과 같은 다이얼업 접속의 조합은 저렴한 비용으로 임대라인 기반의 사설망의 대안이 되고 있다. VPN 장비의 고가용성(High Availability, HA)에 대한 기업의 요구가 증대되고 있다. 본 논문에서 VPN 게이트웨이에서 링크 이중화를 통한 액티브-액티브 방식을 이용해 네트웍 접근성의 고가용성과 네트웍 부하 분산 기법을 제안한다. 네트웍 링크의 고가용성/부하분산은 외부 내트웍 접근을 독립적인 두 개의 라인으로 이중화하는 것으로 달성할 수 있다. 이것은 둘 중 하나의 링크에 문제가 발생하더라도 내부 사용자에게 지속적인 네트웍 접근을 제공할 수 있다. 뿐만 아니라, 네트웍 부하를 두 개의 라인으로 분산시킴으로써 두 배에 가까운 네트웍 대역폭을 제공할 수 있다. 네트웍 링크의 부하 분배를 위해 정적인 알고리즘과 동적인 알고리즘을 제안한다.

• Earthquakes and Structures
• /
• 제16권1호
• /
• pp.83-96
• /
• 2019

The seismic behavior of PRC coupling beam-hybrid coupled shear wall system is analyzed by using the finite element software ABAQUS. The stress distribution of steel plate, reinforcing bar in coupling beam, reinforcing bar in slab and concrete is investigated. Meanwhile, the plastic hinges developing law of this hybrid coupled shear wall system is also studied. Further, the effect of coupling ratio, section dimensions of coupling beam, aspect ratio of single shear wall, total height of structure and the role of slab on the seismic behavior of the new structural system. A fitting formula of plate characteristic values for PRC coupling beams based on different displacement requirements is proposed through the experimental date regression analysis of PRC coupling beams at home and abroad. The seismic behavior control method for PRC coupling beam-hybrid coupled shear wall system is proposed based on the continuous connection method and through controlling the coupling ratio, the roof displacement, story drift angle of hybrid coupled shear wall system, displacement ductility of coupling beam.

• 한국농촌건축학회논문집
• /
• 제22권4호
• /
• pp.51-62
• /
• 2020

Article 6 of the Landscape Act stipulates that "the Minister of Land, Infrastructure and Transport establishes a basic landscape policy plan every five years in order to create a beautiful and pleasant landscape, discover and support excellent landscapes." This is a comprehensive plan for landscape policy, a national plan that presents basic directions and strategies for the formation and continuous management of excellent national landscape. The basic landscape policy plan is a plan established every five years. It is an action plan that establishes a medium-term strategy for landscape policy and proposes specific implementation plans. Landscape-related policies are established in various fields, such as the central and local governments, and the private sector, and are based on mutual cooperation. Local cities voluntarily establish basic landscape plans, but in terms of integration, there are few cases in connection with urban regeneration. However, when the existing city establishes the basic landscape plan, the effect will be doubled if a new city is comprehensively constructed in relation to urban regeneration from the overall aspect of the city. Therefore, this study aims to provide data so that a master landscape plan can be established by analyzing and synthesizing the problems of the existing city centering on Jeonju, a representative local city.

• International Journal of Computer Science & Network Security
• /
• 제21권1호
• /
• pp.184-191
• /
• 2021

The amount of information and data in the digital era is increasing tremendously. Continuous online connectivity is generating a massive amount of data that needs to store in computers and be made available as and when required. Cloud computing technology plays a pivotal role in this league. Cloud computing is a term that refers to computer systems, resources and online services that aim to protect and manage data in an effective, more efficient and easy way. Cloud computing is an important standard for maintaining the integrity and security of sensitive data and information for organizations and individuals. Cloud security is one of the most important challenges that the security of the entire cloud system depends on. Thus, the present study reviews the security challenges that exist in cloud computing, including attacks that negatively affect cloud resources. The study also addresses the most serious threats that affect cloud security. We also reviewed several studies, specifically those from 2017-20, that cited effective mechanisms to protect authentication, availability and connection security in the cloud. The present analysis aims to provide solutions to the problems and causes of cloud computing security system violations, which can be used now and developed in the future.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권8호
• /
• pp.117-126
• /
• 2021

The increasing number of retrenchments because of the current global pandemic, Covid-19, has led many to shift to the digital economy, especially among the low-income group (B40) in Malaysia. Crowdsourcing is the collection of information, opinions, or work from a group of people, usually sourced via the Internet. Fueled by the development of Internet-based platforms that provided its technological foundation, and the need for an agile and uniquely skilled workforce, crowdsourcing has grown from the grassroots, with a burgeoning body of research investigating its many aspects. However, very few studies examined crowd workers' motivation for continuous participation on online crowdsourcing platforms. Thus, this paper aims to explore the technological factors that facilitate B40's group motivation in Malaysia to continue to participate in online crowdsourcing platforms. This paper employed a qualitative approach, using a semi-structured interview. The thematic analysis method was used to decode the data extracted from the interview transcript. The finding of this study identified four main themes and seven sub-themes: (1) Technology efficacy, (2) Platform Management: client-worker management, safety net, payment mechanism, (3) Platform Design: UI design, rating feature and (4) Infrastructure: Internet connection, technology infrastructure. This study can provide a guideline for managing crowdsourcing practices in Malaysia, especially for the crowdsourcing platform developer.

• Steel and Composite Structures
• /
• 제48권5호
• /
• pp.547-564
• /
• 2023

This study investigates the effect of bolt preloading on the rotational stiffness of stainless steel end-plate connections. An experimental programme incorporating 11 full-scale joint specimens are carried out comparing the behaviours of fully pre-tensioned (PT) and snug-tightened (ST) flush/extended end-plate connections, made of austenitic or lean duplex stainless steels. It is observed from the tests that the presence of bolt preloading leads to a significant increase in the rotational stiffness. A parallel finite element analysis (FEA) validated against the test results demonstrates that the geometric imperfection of end-plate has a strong influence on the moment-rotation response of preloaded end-plate connections, which is crucial to explain the observed "two-stage" behaviour of these connections. Based on the data obtained from the tests and FE parametric study, the performance of the Eurocode 3 predictive model is evaluated, which exhibits a significant deviation in predicting the rotational stiffness of stainless steel end-plate connections. A modified bi-linear model, which incorporates three key properties, is therefore proposed to enable a better prediction. Finally, the effect of bolt preloading is demonstrated at the system (structure) level considering the serviceability of semi-continuous stainless steel beams with end-plate connections.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2011년도 춘계학술발표대회
• /
• pp.1608-1609
• /
• 2011

국토해양부에서는 건설사업의 생산성을 향상시키고 건설사업의 효율성을 제고하기 위해 건설기술관리법 제15조의 2에 따라 건설공사지원통합정보체계의 구성.운영에 관한 법률을 마련하고 1998년부터 건설사업정보화(Continuous Acquisition Life-Cycle Support : CALS)를 추진중에 있다. 건설사업정보화의 일환으로 건설공사비의 상당부분을 차지하고 개인의 소유권과 관계되어 있어 민원 소지가 많은 보상자료를 관리하기 위해 용지보상시스템이 기 개발되어 운영중에 있으나 보상비 지출의 핵심과정인 지급단계가 국가재정정보시스템과 별도로 운영중에 있어 체계적인 보상자료 관리 및 보상비 지급의 이력관리가 제대로 이루어지 지고 있지 않다. 이는 곧 부적절한 보상비 집행으로 인한 국고예산 낭비의 소지가 있고 보상비 집행에 대한 대민 신뢰도 저하로 인해 다수의 소송으로 이어질수 있다. 이에 기존의 보상비 집행업무 프로세스 개선 및 건설CALS 용지보상시스템과 디지털예산회계시스템의 연계를 통해 보상비 집행의 투명성을 확보하고 민원인들에게 대민행정에 대한 신뢰도를 높일 수 있는 방안을 제시하고자 한다.

• International Journal of Advanced Culture Technology
• /
• 제11권2호
• /
• pp.170-177
• /
• 2023

In quantum mechanics, uncertainty refers to the uncertainty of a measurement physical quantity, because some mechanical quantity can only be in its eigenstate under certain conditions, and the values shown are discrete.The exact value can only be obtained by measuring it in the eigenstate of this mechanical quantity.Uncertainty is like a double-edged sword, which has both advantages and disadvantages in art itself and in the process of artistic creation. In this study, it is divided into three main parts. First, the existence of uncertainties in contemporary art is sorted out in two broad parts, the definition of the uncertainties in art and the specific expression in contemporary art, respectively, with examples from four aspects of psychological impact, accidental presentation effect, expression form and connection with the viewer. The purpose is to understand how uncertainties are expressed in the process of artistic creation. Second, the role of the uncertainties in artistic creation is analyzed through examples, and then it is proposed that artists should use uncertainties to serve art with a scientific and rational attitude. Thirdly, the application of uncertainties in my creative practice and their influences on my painting creation. In summary, every artistic creator should take art seriously and sincerely. The relationship among the creative subject, society and life is an eternal and continuous interaction, and art is a carrier of reflection. For the problems brought by uncertainties in artistic creation, from choosing new certainty by thinking to the emergence of uncertainties, such a cycle is the process of art sublimating from life and being closely related to life.

• 전기전자학회논문지
• /
• 제27권4호
• /
• pp.679-682
• /
• 2023

무선센서 네트워크에서 센서 노드간의 통신 연결 실패는 계속된 연결 시도를 유발하여 많은 전력 손실이 발생한다. 본 논문에서는 CH(Cluster Head) 노드와 통신되는 센서 노드 사이의 적정 거리를 제한하여, 2차원 평면상에 적정 크기의 클러스터 그룹이 형성되도록 하였다. 클러스터 크기의 균일화를 위해 최단 거리에 존재하는 센서 노드들이 서로 통신하여 멤버 노드를 구성하고 근접한 노드를 모아서 클러스터가 형성되도록 하였다. 제안한 클러스터 균일화 알고리즘을 기반으로 클러스터링을 위한 최단 거리 기반의 클러스터링 방식에 대한 클러스터 균일화 개선율을 시뮬레이션 결과로 나타내었다. 제안한 방식은 네트워크의 클러스터 균일성을 약 30% 향상시킬 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제18권1호
• /
• pp.15-29
• /
• 2024

A fetoscope is an optical endoscope, which is often applied in fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome. In an operation, the clinician needs to observe the abnormal placental vessels through the endoscope, so as to guide the operation. However, low-quality imaging and narrow field of view of the fetoscope increase the difficulty of the operation. Introducing an accurate placental vessel segmentation of fetoscopic images can assist the fetoscopic laser photocoagulation and help identify the abnormal vessels. This study proposes a method to solve the above problems. A novel encoder-decoder network with a dual-path structure is proposed to segment the placental vessels in fetoscopic images. In particular, we introduce a channel attention mechanism and a continuous convolution structure to obtain multi-scale features with their weights. Moreover, a switching connection is inserted between the corresponding blocks of the two paths to strengthen their relationship. According to the results of a set of blood vessel segmentation experiments conducted on a public fetoscopic image dataset, our method has achieved higher scores than the current mainstream segmentation methods, raising the dice similarity coefficient, intersection over union, and pixel accuracy by 5.80%, 8.39% and 0.62%, respectively.