• Journal of the Korean earth science society
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• v.21 no.3
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• pp.208-218
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• 2000

The popularization and the common use of internet are realizing these days thanks to the development of web. Using the web as a teaching instrument is the Web Based Instruction(WBI). WBI, along with constructivism, has a great influence on the present educational society. However, many problems were found in learners' using the numerous WBI programs in cyber space. Above all, the interaction between teachers and learners is not enough, and searching for the materials on web is not easy. It's very difficult for a teacher to design and construct a WBI program in school teaching. But It is not so difficult to design and construct a WBI program based on interaction. Therefore, if a teacher familiar to students in school makes a web page and provides a cyberspace, the students will interact very easily them in the cyberspace. They can use the e-mail, bulletin board or discuss and chat. The cyberspace will make up for the insufficient interaction in school life. But because this program needs all students have proper material condition, there will be another kind of estranged learners. Thus, this problem can be solved by the cheap-popular PC offering movement backed by the government, and other types of projects systematically.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.699-707
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• 2016

This paper proposes a low-complexity central processing unit (CPU) that is suitable for deeply embedded systems, including Internet of things (IoT) applications. The core features a 16-bit instruction set architecture (ISA) that leads to high code density, as well as a multicycle architecture with a counter-based control unit and adder sharing that lead to a small hardware area. A co-processor, instruction cache, AMBA bus, internal SRAM, external memory, on-chip debugger (OCD), and peripheral I/Os are placed around the core to make a system-on-a-chip (SoC) platform. This platform is based on a modified Harvard architecture to facilitate memory access by reducing the number of access clock cycles. The SoC platform and CPU were simulated and verified at the C and the assembly levels, and FPGA prototyping with integrated logic analysis was carried out. The CPU was synthesized at the ASIC front-end gate netlist level using a $0.18{\mu}m$ digital CMOS technology with 1.8V supply, resulting in a gate count of merely 7700 at a 50MHz clock speed. The SoC platform was embedded in an FPGA on a miniature board and applied to deeply embedded IoT applications.

• Cartoon and Animation Studies
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• s.34
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• pp.263-292
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• 2014

This research explores websites of comics museum provided by the Korean Manhwa Museum and the Kyoto International Manga Museum and is supposed to analyze the type of content and finding out features. Since both museums specialize in comics and provide diverse information related to comics and their museums, this research analyze them on the basis of three types of categories, which are public relations content, professional content, and exhibition/education content The result shows that both museums generally provide similar type of information and content even though there are small differences. Especially, they have common points in the way that both offer detailed information of museum facilities and about exhibition schedules and education programs. However, the goal they are aiming at shows a difference. Korea Manhwa Museum tries to have interactive communication with its site visitors using the bulletin board system and to update newly published comics and events frequently managing separate websites. Kyoto International Manga Museum seems to focus on promoting itself in order to have more museum visitors. It provides detailed information such as history of the museum building, the object of setting up the museum and so on. Also, it provides four different foreign language websites.

• Korean Security Journal
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• no.44
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• pp.199-223
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• 2015

The purpose of this study is to find the development of the personal protection business plan based on the problem that guards are now aware of personal protection service. In order to achieve the objectives of this study, we analyzed the data after expert survey and interview conducted by seven experts engaged in personal protection services more than 15 years. The guard who perform personal protection service proposed a development plan of personal protection services as follows. First, the current education system for new employees' training is required to improve the educational program of 40 hours in subjects related to personal protection duties by reorganization Second, the personal protection service training for guards also appropriate to switch to 8-hour training program for three months through an educational organization controlled by country. Third, the personal protection guards should be proceeding the practical programs required in the field and quality education in the different section by competent and professional instructors. Fourth, it should be revised Regulating that on the site of collective civil petition including in Events related to events across the board in the security services law. Fifth, there needs to be a change of recognition between police and private security firms, and to be set up the organization for supervision of management by police and private security firms jointly. Sixth, there needs to be organized a subcommittee which is consisting of experts in each task on Korea Security Association, and founded Korea Personal Protection Association for development associated with the personal protection service and to protect the rights of personal protection guards.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.535-545
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• 2019

The PBA of ship weapon system should be installed and operated under harsh environmental conditions and so it should be highly reliable to endure the mission profiles during its entire lifetime. In the case of PBA failure during operation, rapid maintenance is highly likely to be difficult due to problems such as supply of parts, which can have a devastating effect on the mission. In order to validate the reliability of PBA, a series of tests are performed with PBA samples, but they require time, testing facilities, samples, expenses and failure analysis if failed. The reliability of PBA is predicted on the basis of specifications such as MIL-HDBK-217F, but this specification does not take into account failure mechanisms for specific design details, environment and usage, interconnects and its characteristics that drive many failures of PBA in the field. Therefore, this study predicts the reliability of PBA using an RPA tool and proposes the RPA methodology as a validation process at the design stage. With RPA, it is now possible to achieve design validation including inherent failure mechanism, identification of weakest link, alternative design options, and test plan development.

• The Journal of Sustainable Design and Educational Environment Research
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• v.14 no.2
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• pp.12-25
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• 2015

This study is currently presenting a creative education policy through the new 2015 revised curriculum and the Free semester system of Middle School as part of the education policy reform in the government-led, high freedom grade in each regional school board first, emotional schools, friendly school, campus type schools, etc. with creative thinking and improve students' autonomous judgment with the psychological and political reasons meant to provide amusement and certainty of their career choice. This creates space for creative education through the theoretical understanding of the educational philosophical thinking on creativity was to identify the appropriate means of educational space. The purpose of this study was to extract the linkage to produce creative educational environment that is generated through the philosophical thinking of the historical and psychological analysis of creativity with a human being. Future school construction has a future-oriented task should create a creative learning space in the center of the member schools. This creates space for creative education through the theoretical understanding of the educational philosophical thinking on creativity was to identify the appropriate means of educational space. Therefore Philosophical Thinking Creative School of members through the grounds centric collaboration focused on convergence enemy curriculum and school creative autonomy of operation which is central educational environment, that is diversified assistance as an attribute of the environment, space, space, flexible outdoor space, linking enemy center space, different types and sizes of the space case situation, the open space and spatial fusion can be seen the configuration doeeojim with different training space element.

• Journal of Korean Society of Transportation
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• v.21 no.4
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• pp.17-27
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• 2003

In general, an airport access system has influenced on airport terminal operation. The congestion and delay in service facilities at an airport are definitely depended on the patterns of passenger arrival behavior and time spent in a terminal. Therefore, it is necessary to analyze the passenger arrival behavior at an airport to improve the operations at passenger terminal. Passenger arrival patterns to an airport are mainly depended on factors such as the length of access time. reliability of access time. and provision of transport modes, etc. The focus of this paper is to estimate the relationship between the length of access time and passenger's total time spent to board aeroplane. For this, passenger surveys were conducted at the Gimpo International Airport for a large airport and Sacheon Airport for a small size airport. The mathematical relationship between arrival time at an airport prior to the scheduled time of departure(STD) and access time spent was then estimated. It is considered that the results of this study can be used to reduce congestion and delays, thereby to improve the efficiency of the passenger services at the airports.

• Journal of the HCI Society of Korea
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• v.14 no.2
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• pp.41-47
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• 2019

In this study, a smart assistive device is designed to recognize pedestrian signal and to provide audio instructions for visually impaired people in crossing streets safely. Walking alone is one of the biggest challenges to the visually impaired and it deteriorates their life quality. The proposed device has a camera attached on a pair of glasses which can detect traffic lights, recognize pedestrian signals in real-time using a machine learning algorithm on GPU board and provide audio instructions to the user. For the portability, the dimension of the device is designed to be compact and light but with sufficient battery life. The embedded processor of device is wired to the small camera which is attached on a pair of glasses. Also, on inner part of the leg of the glasses, a bone-conduction speaker is installed which can give audio instructions without blocking external sounds for safety reason. The performance of the proposed device was validated with experiments and it showed 87.0% recall and 100% precision for detecting pedestrian green light, and 94.4% recall and 97.1% precision for detecting pedestrian red light.

• Journal of Korea Foundry Society
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• v.41 no.6
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• pp.550-557
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• 2021

With the advent of the fourth industrial revolution, the interest in the internet of things (IoT) in manufacturing is growing, even at foundries. There are several types of process data that can be automatically collected at a foundry, but considerable amounts of process data are still managed based on handwriting for reasons such as the limited functions of outdated production facilities and process design based on operator know-how. In particular, despite recognizing the importance of converting process data into big data, many companies have difficulty adopting these steps willingly due to the burden of system construction costs. In this study, the field applicability of IoT-based devices was examined by manufacturing devices and applying them directly to the site of a centrifugal foundry. For the centrifugal casting process, the temperature and humidity of the working site, the molten metal temperature, and mold rotation speed were selected as process parameters to be collected. The sensors were selected in consideration of the detailed product specifications and cost required for each process parameter, and the circuit was configured using a NodeMCU board capable of wireless communication for IoT-based devices. After designing the circuit, PCB boards were prepared for each parameter, and each device was installed on site considering the working environment. After the on-site installation process, it was confirmed that the level of satisfaction with the safety of the workers and the efficiency of process management increased. Also, it is expected that it will be possible to link process data and quality data in the future, if process parameters are continuously collected. The IoT-based device designed in this study has adequate reliability at a low cast, meaning that the application of this technique can be considered as a cornerstone of data collecting at foundries.

• Progress in Medical Physics
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• v.18 no.2
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• pp.81-86
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• 2007

The cone-beam CT (CBCT) which is acquired using on-board imager (OBI) attached to a linear accelerator is widely used for the image guided radiation therapy. In this study, the effect of respiratory motion on the quality of CBCT image was evaluated. A phantom system was constructed in order to simulate respiratory motion. One part of the system is composed of a moving plate and a motor driving component which can control the motional cycle and motional range. The other part is solid water phantom containing a small cubic phantom ($2{\times}2{\times}2cm^3$) surrounded by air which simulate a small tumor volume in the lung air cavity CBCT images of the phantom were acquired in 20 different cases and compared with the image in the static status. The 20 different cases are constituted with 4 different motional ranges (0.7 cm, 1.6 cm, 2.4 cm, 3.1 cm) and 5 different motional cycles (2, 3, 4, 5, 6 sec). The difference of CT number in the coronal image was evaluated as a deformation degree of image quality. The relative average pixel intensity values as a compared CT number of static CBCT image were 71.07% at 0.7 cm motional range, 48.88% at 1.6 cm motional range, 30.60% at 2.4 cm motional range, 17.38% at 3.1 cm motional range The tumor phantom sizes which were defined as the length with different CT number compared with air were increased as the increase of motional range (2.1 cm: no motion, 2.66 cm: 0.7 cm motion, 3.06 cm: 1.6 cm motion, 3.62 cm: 2.4 cm motion, 4.04 cm: 3.1 cm motion). This study shows that respiratory motion in the region of inhomogeneous structures can degrade the image quality of CBCT and it must be considered in the process of setup error correction using CBCT images.