• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.06a
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• pp.107-113
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• 2002

We have developed the MIBs for Access Gateway which is for diverse subscribers to access the core network at the NGN. We organized the subscriber and network interface Information such as xDSL, ATN, PSTN, MIBs, and so on. The MIBs are managed by EMS.

• Proceedings of the Korea Society of Design Studies Conference
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• 2005.05a
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• pp.124-125
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• 2005

• Annals of Clinical Neurophysiology
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• v.15 no.2
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• pp.59-62
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• 2013

Man-in-the-barrel syndrome (MIBS) is a clinical syndrome of bilateral upper limb weakness with normal lower extremity function. It can be caused by various neurological conditions such as bilateral cerebral hypoperfusion, syringomyelia, motor neuron disease, or cervical myelopathies. We report a patient with MIBS after cervical spinal cord ischemia. It is postulated to be caused by ischemic insults of anterior spinal artery from repeated and prolonged neck extension.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.13 no.1
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• pp.435-451
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• 2019

Impossible differential cryptanalysis is an essential cryptanalytic technique and its key point is whether there is an impossible differential path. The main factor of influencing impossible differential cryptanalysis is the length of the rounds of the impossible differential trail because the attack will be more close to the real encryption algorithm with the number becoming longer. We provide the upper bound of the longest impossible differential trails of several important block ciphers. We first analyse the national standard of the Russian Federation in 2015, Kuznyechik, which utilizes the 16-byte LFSR to achieve the linear transformation. We conclude that there is no any 3-round impossible differential trail of the Kuznyechik without the consideration of the specific S-boxes. Then we ascertain the longest impossible differential paths of several other important block ciphers by using the matrix method which can be extended to many other block ciphers. As a result, we show that, unless considering the details of the S-boxes, there is no any more than or equal to 5-round, 7-round and 9-round impossible differential paths for KLEIN, Midori64 and MIBS respectively.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.3
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• pp.580-592
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• 1997

Since an ATM network consists of a number of VPC/VCC requiring various QoS requirements, the end-to-end QoS for each VPC/VCC should be guaranteed. Although many research works on the traffic control are under study to guarantee the QoS, there have been research efforts to reflect the results of network management functions into the traffic control mechanism. To effectively make use of the performance management functions into the VPC/VCC management, threre is a need for the network manager to rapidly retrieve the relevant information. In this research, the mechanism to effectively retrieve the management information using SNMP is suggested. First of all, we construct the MIBs in the agent for the corresponding VPC/VCC. Also, we suggest the way to retrieve MIB with minimum cost. Mathematical analysis shows that the proposed technique has better performance than that using the existing SNMP.

• Journal of Digital Contents Society
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• v.1 no.1
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• pp.13-22
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• 2000

In this paper, it is designed and implemented the management system to monitor and control PCs running on MS Windows or NT and define some MIBs using SNMP. The proposed system has controlling functions to control the status of PC and monitoring functions to have real-time monitoring and control processes. The controlling system supports update and setting of the configuration information of managed systems and backup/restore the information when it happens to be some faults. The monitoring system has some functions such as monitoring the processes of the PC, controlling the process on PC, and invoking a new job. This paper proposes a way of enhancing the performance of monitoring capabilities by screen partitioning and analysis techniques.

• Journal of Ocean Engineering and Technology
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• v.34 no.1
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• pp.1-12
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• 2020

Although there are many kinds of advanced ballast water management systems, pioneering studies for ballast-water free ship and minimal ballast water ship concepts are in progress. In this study, the existing alternatives of ballast water are reviewed and a new design concept is studied on the basis of the existing bulk carrier hull form. To develop a new design alternative which has minimal ballast for ballast water discharge free operation, the new concept should have technical feasibilities that are related to the role of the ballast water, berth access, loading constraints, etc. For this purpose, a simplified systems engineering basis design approach is adopted using a business model as the system analysis and control tool. To check the performance feasibility of the new concept, ship resistance performance is reviewed based on a model scale ship resistance performance analysis.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.1 no.1
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• pp.17-21
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• 2002

There are many problems of interoperability between ITS system equipments since the protocol standard for a network center and a node has not defined. In this paper, we consider the use of the SNMP to solve the interoperability problem, and apply the SNMP in the case of a CCTV as an example. Also, we defined its corresponding MIBs and accomplished the interoperability test, where the method of controlling the CCTV is explained and the data transmitted on the network are shown in a hexadecimal format. Our results are expected to be helpful for a guideline or feasibility test as nationwide data to support the interoperability of ITS systems between a network center and nodes.

• The Transactions of the Korea Information Processing Society
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• v.7 no.8
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• pp.2505-2513
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• 2000

This paper describes the design and implementation of a CORBA/SNMP gateway. The gateway is used to integrate traditional network management systems using CORBA. The integrated network management system uses World Wide Web (WWW) and CORBA. WWW provides a platform-independent and easy-to-use interface to distributed applications and CORBA is used to integrate different network management models seamlessly. To support the traditional managed objects without modification, we use a translation gateway between two different management models. The integrated network management server consists of a WWW server with enhancement for network management and translation gateways for converting management operations between different management models. This paper describes the design and implementation of a CORBA/SNMP gateway. The CORBA/SNMP gateway provides a syntactic and dynamic translation between CORBA and SNMP management models. The gateway provides a CORBA view to SNMP MIBs and allows the CORBA managers to access SNMP agents via CORBA operations. The CORBA/SNMP gateway also delivers the traps occurred in the SNMP agents to the CORBA managers that want to receive the trap information.

• KEPCO Journal on Electric Power and Energy
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• v.2 no.2
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• pp.259-268
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• 2016

KEPCO installed AMI (Advanced Metering Infrastructure) metering system for low-voltage customers from 2008. AMI metering system of KEPCO has operated 2.55 million customers and will plan to operate 22 million customers until 2020. KEPCO developed AMI NMS (Network Management System) to operate the meter reading network efficiently. NMS monitors the network status of DCUs (Data Concentration Unit) and modems. NMS provides functionalities of data collection and analysis. It collects property data of network device, network topology information, communication performance information, fault information, and etc. It analyzes collected data and controls network devices by remote access. AMI NMS collects about 370 MIBs (Mangement Information Bases) using SNMP (Simple Network Management Protocol). This paper introduces main functionalities, designed context, and implemented service screen.