• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.16 no.5
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• pp.109-120
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• 2017

It is important to estimate objectively in the driving test. Especially, the driving test is examined by totally driving ability, rule observation and situational judgement. For this, a grading automation system for driving test was presented by using GPS, sensor data and equipment operation informations. This system is composed of vehicle mounted module, automatic grading terminal, data controller, data storage and processing server. The vehicle mounted module gathters sensor data in the car. The terminal performs automatic grading using the received sensor data according the driving test criterion. To overcome the misposition of vehicle in the map due to GPS error, we proposed the automatic grading system by map matching method, path deviation and return algorithm. In the experimental results, it was possible to grade automatically, display the right position of the car, and return to the right path under 10 seconds when the vehicle was out of the shadow region of the GPS. This system can be also applied to the driving education.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.48 no.10
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• pp.1317-1326
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• 1999

As the integration ratio and operation speed increase, it has become an important problem to estimate the dissipated power during the design procedure as a method to reduce the TTM(time to market). This paper proposed a prediction model to estimate the maximum dissipated power of a CMOS logic gate. This model uses a calculational method. It was formed by including the characteristics of MOSFETs of which a CMOS gate consists, the operational characteristics of the gate, and the characteristics of the input signals. As the modeling process, a maximum power estimation model for CMOS inverter was formed first, and then a conversion model to convert a multiple input CMOS gate into a corresponding CMOS inverter was proposed. Finally, the power model for inverter was applied to the converted result so that the model could be applied to a general CMOS gate. For experiment, several CMOS gates were designed in layout level by $0.6{\mu}m$ layout design rule. The result by comparing the calculated results with those from HSPICE simulations for the gates showed that the gate conversion model has within 5% of the relative error rate to the SPICE and the maximum power estimation model has within 10% of the relative error rate. Thus, the proposed models have sufficient accuracies. Also in calculation time, the proposed models was more than 30 times faster than SPICE simulation. Consequently, it can be said that the proposed model could be used efficiently to estimate the maximum dissipated power of a CMOS logic gate during the design procedure.

• Journal of the Korean Society of Safety
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• v.33 no.1
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• pp.66-72
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• 2018

This study analyses the types, related operations, facilities, and causes of chemical accidents in Korea based on the RISCAD classification taxonomy. In addition, human error analysis was carried out employing different human error classification criteria. Explosion and fire were major accident types, and nearly half of the accidents occurred during maintenance operation. In terms of related facility, storage devices and separators were the two most frequently involved ones. Results of the human error-based analysis showed that latent human errors in management level are involved in many accidents as well as active errors in the field level. Action errors related to unsafe behavior leads to accidents more often compared with the checking behavior. In particular, actions missed and inappropriate actions were major problems among the unsafe behaviors, which implicates that the compliance with the work procedure should be emphasized through education/training for the workers and the establishment of safety culture. According to the analysis of the causes of the human error, the frequency of skill-based mistakes leading to accidents were significantly lower than that of rule-based and knowledge based mistakes. However, there was limitation in the analysis of the root causes due to limited information in the accident investigation report. To solve this, it is suggested to adopt advanced accident investigation system including the establishment of independent organization and improvement in regulation.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.14
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• pp.177-218
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• 2000

Global Electronic Trading means that trading partners trade each other via Global Electronic Trading Network, that is, global business to business electronic commerce. Recently, where the cargo arrives ahead of the B/L, the importer cannot take delivery of the cargo without the B/L. This situation is referred to as the B/L dilemma. But the BOLERO system will resolve this B/L dilemma. Bolero Project is developing a cross industry utility platform for the secure, electronic transfer of commercial trade information world wide. After the successful testing of an original pilot project, The Bolero Association was formed in 1995 by a group of interested cross industry companies. As a joint venture between SWIFT and TT Club, bolero.net is changing the way the world trades by providing a web-based, paperless mode of commerce that is designed to become a global standard. Bolero International Limited published the first edition of Bolero Rulebook in 1999. The Bolero Rulebook as amended from time to time, governing the relationship between Users and their rights and obligations arising from the Bolero system. The Bolero service will be governed by a multilateral contract called the Bolero Rule Book which specifies the rights and responsibilities of Bolero and its users. The Title Registry and Bolero Bill of Lading provide a fully functional equivalent to the paper bill of lading. The Bolero Bill of Lading can be created, transferred, amended, and surrendered by way of designating to order party, blank endorsement, refusal by the transferee etc. Thus, this study deals with the functions of Bolero Bill of Lading and the problems and solutions in the Bolero Bill of Lading in point of definitions and operation under the Bolero Rulebook.

• Composites Research
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• v.14 no.2
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• pp.8-12
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• 2001

Filament Winding Process is a comparatively simple operation in which continuous reinforcements in the form of roving are wound over a rotating mandrel. It is well established and versatile method for storage tanks and pipes for the chemical and other industries. In this study, tensile strength of a filament wound ring specimens were evaluated by a split disk test fixture and a dress disk test fixture. The results obtained from experiments were compared with the theoretical values from the rule of mixtures. The purpose of this paper is the suggestion of an appropriate test method for the evaluation of tensile properties of filament wound structures. The tensile strength of a ring specimen tested by the dress disk test showed better agreement with the theoretical values than those tested by the split disk test because of higher stress concentration in edges of a split disk test fixture. The results showed that the tensile strength of a ring specimen was influenced by the geometry of test fixture, the continuity of fibers, fiber-tension, fiber-end and stress concentration in specimen.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.2
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• pp.370-378
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• 2008

The CEDA(Certified E-Document Authority) is a reliable third party that deposit electronic document having legal effects securely, and verify contents of document or transmission. This paper focuses on a function of secure transmission among several important functions, and implements public key encryption system for secure transmission when server and user communicate for image transmission. This paper follows a standard fundamental rule of X.509 in ITU-T, and it uses symmetric encryption algorithm to raise speed of a large data operation. A key of symmetric encryption algorithm is encrypted by private key in public key system, it protects to be modified using digital signature for data integrity. Also it uses certificates for mutual authentication.

• Design & Manufacturing
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• v.10 no.1
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• pp.51-54
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• 2016

Metal sheet forming has been commonly used as the core technology in manufacturing parts of automobiles. It guarantees the highest production rate due to the process of mass production employing the press die. For precision of the product, the accuracy of the molds and its mechanic structures are considered as essential factors. One of these is fine blanking, which is utilized for the production of the metal sheet spring, with which clear sheer surfaces can be achieved in one operation from the materials. However, the current designs of press dies perform the forming analysis with the molds of rigid body, so they are focused on weight lightening by a rule of thumb. Therefore, this paper practice structural analysis about developing the semi fine-fine blanking technology. The semi fine-blanking can be run through the combination of the hydraulic cylinders and normal presses, so this paper analyze the amount of deformation according to the oil pressure. In addition, based on the plasticity of 50CrV4, the materials of the mold parts, the structural analysis and life analysis are proceeded, so they are expected to be useful as data for manufacturing the mold.

• Journal of the Korean Society of Food Culture
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• v.9 no.5
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• pp.467-478
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• 1995

The school food service system has been an important national policy in Korea. To find out the reference data of the school food service system, we surveyed four primary schools, one middle school, and one food service center in Nara, Japan. The results are as follows; 1. The school food service was carried out in 99.4% of primary school children and in 82.5% of middle school students. 2. The central commissary school food service system was utilized at 49.0% of primary schools and 68.5% of middle schools. 3. The expense of the system is supported partially by the student's parents and partially by the government, of which the support rate was noticed by the law of school food service. 4. The dietary content of school food service was laid down by 'The rule of the operation basis of school food service'. The menu was chosen by the 7 kinds of stepwise meetings. 5. The teachers emphasized on the food etiquette, the appreciation to the food and the personal relationship during meal, as well as on the nutritional balance. 6. We found other problems in Japanese food service system, such as the sanitary problems, the problems of the new tableware, and whether the central kitchen had less advantage than the individual school kitchen. We can conclude that the school food service system is becoming the essential part in school education, and hope to design not only economical but also educational system in Korea, with the consideration of Japanese system.

• Journal of Science and Technology Studies
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• v.5 no.2 s.10
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• pp.69-95
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• 2005

Eunsa Memorial Science Museum is a political space to justify ruling colony. Japanese imperialism made use of science museum in ruling colony under the cloak of propagating science thoughts. The science museums made it natural to rule the inferior Joseon(Korea) by bring the concept of 'Great Science Empire' into relief. The exhibition, lecture, experiment and science movies propagated those colonial ruling ideology. This transplantation of the colonial science museumraised the following problems. First, the science museum was used as means for the propagation of political power. All the aspects of the architecture, exhibition, and operation of the colonial science museum propagated and supported the direction of political authority, and furthermore planted a rosy phantasm of 'Development' and 'Progression' into the colony. Second, The science technology of science museum was treated as 'Result' and 'Instrument'. Japanese imperialism denied that the science is a historical and cultural staple product; it instilled only the 'Instrumental Rationality' in the colony. Third, the science technology dealt in the colonial science museum was below the level. What they educated and set forth as domestic science was to cultivate the laborers people for the political power by internalizing modernistic discipline.

• Journal of the Korea Society of Computer and Information
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• v.17 no.4
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• pp.11-18
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• 2012

Deep packet inspection which perform pattern matching to search for malicious patterns in the packet is most computationally intensive task. Hardware-based pattern matching is required for real-time packet inspection in high-speed network. In this paper, we have designed and implemented network intrusion detection hardware as a Microblaze-based SoC using Virtex-6 FPGA, which capture the network input packet, perform hardware-based pattern matching for patterns in the Snort rule, and provide the matching result to the software. We verify the operation of the implemented system using traffic generator and real network traffic. The implemented hardware can be used in network intrusion detection system operated in wire-speed.