• Journal of Korea Multimedia Society
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• v.19 no.7
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• pp.1154-1158
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• 2016

This paper presents a System-On-a-chip for embedded image processing applications that need Gaussian Pyramid structure. The system is fully implemented into Field-Programmable Gate Array (FPGA) based on the prototyping platform. The SoC consists of embedded processor core and a hardware accelerator for Gaussian Pyramid construction. The performance of the implementation is benchmarked against software implementations on different platforms.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.2
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• pp.207-215
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• 2004

The PLC programming by IEC1131-3 is hard to handle to ordinary users as well as professionals. Also it has not a generality, so that it couldn't be debugging some logic errors easily. In order to be adapted for such environment, In this paper, I have developed the ISPLC(Intelligent Agent System based Software Programmable Logic Controller). In ISPLC system, LD programmed by a user is converted to the C code which can be used in a commercial editor such as Visual C++. The detection of logical errors in C code is more effective than PLC programming itself. ISPLC provides the GUI-based interface in web environment and an easy programming platform to such beginners as well as professionals. The study of code conversion of LD to IL as well as IL to C is firstly tried in the world as well as KOREA. To show the effectiveness of the developed system, I applied it to a practical case, a real time traffic control system. ISPLC is minimized the error debugging and programming time owing to be supported by windows application programs.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.11
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• pp.109-118
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• 2007

As the integration density and the operating speed of System on Chips (SoCs) become increasingly high, it is crucial to test delay defects on the SoCs. This paper introduces an enhanced IEEE 1500 wrapper cell architecture and IEEE 1149.1 TAP controller for the wrapper interface logic, and proposes a transition delay fault test method. The method proposed can detect slow-to-rise and slow-to-fall faults sequentially with low area overhead and short test time. and simultaneously test IEEE 1500 wrapped cores operating at different core clocks.

• Korean Journal of Microbiology
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• v.46 no.3
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• pp.291-295
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• 2010

A novel bacteriocin produced by Streptococcus parauberis Z49 strain was characterized and efficiently extracted from fermented cultures by use of aqueous two-phase systems. The nisin-like bacteriocin, which was active even after a heat treatment at $121^{\circ}C$ for 15 min and in the broad pH range from 2 to 12, showed inhibition of bacterial growth of Micrococcus luteus, Lactobacillus spp., Lactobacillus fermentum, Enterococcus faecium, Listereia monocytogenes, and Pseudomonas fluorescens. Optimal conditions of PEG 600/$Na_2SO_4$ aqueous two-phase systems for the simple and rapid extraction of a novel bacteriocin were determined to be PEG 600 15%, $Na_2SO_4$ 30%, and NaCl 8%, where the bacteriocin was concentrated in PEG layer.

• Journal of Multimedia Information System
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• v.3 no.3
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• pp.85-90
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• 2016

We firstly tried to understand consumers' purchasing tendencies and mainly focused on designing a platform model that offers integrated support. C2B (Customer to Business) orders integrate with a consumption platform of a B2C (Business to Customer) model, and integrated support aims at design, supply, processing, and distribution of a fashion business. All the information such as orders, sales, production, supply, and settlement of accounts is synchronized under the C2B, B2C, and O2O (Online to Offline) environment so that accurate information can be shared in real time. Our platform automatically handles with a net income of a product designer, manufacturer, and shipping company once shipping is confirmed.

• Journal of the Korean Society of Safety
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• v.15 no.1
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• pp.86-92
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• 2000

Recently, more advanced electronic elements become, they consume powerful and radiate more heat in devices. So the most suitable packaging technique is keenly needed. The most important purpose of packaging is to protect devices within a system for a long time and to prevent life of devices from external environments; floating ions such as humidity or sodium, and exposure from ultraviolet rays. In order to study the electrical properties of silicone gels often used as packing material due to the curing condition, volume resistivity and AC breakdown experiment are performed. Specimens are made up at several cured times and temperatures condition ; 0.5[H], 1[H] and 2[H] at 100[$^{\circ}C$], 125[$^{\circ}C$], 150[$^{\circ}C$], 160[$^{\circ}C$], 170[$^{\circ}C$] and 180[$^{\circ}C$]. It is confirmed that from volume resistivity experiment liquid silicone become get state at 90~100 [$^{\circ}C$] and cured specimen for 1~2[H] at 170[$^{\circ}C$] are superior in electrical properties.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.5
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• pp.83-93
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• 2013

Recently, the SURF algorithm, which is conjugated for object tracking system as part of many computer vision applications, is a well-known scale- and rotation-invariant feature detection algorithm. The SURF, due to its high computational complexity, there is essential to develop a hardware accelerator in order to be used on an IP in embedded environment. However, the SURF requires a huge local memory, causing many problems that increase the chip size and decrease the value of IP in ASIC and SoC system design. In this paper, we proposed a way to design a SURF algorithm in hardware with greatly reduced local memory by partitioning the algorithms into several Sub-IPs using external memory and a DMA. To justify validity of the proposed method, we developed an example of simplified object tracking algorithm. The execution speed of the hardware IP was about 31 frame/sec, the logic size was about 74Kgate in the 30nm technology with 81Kbytes local memory in the embedded system platform consisting of ARM Cortex-M0 processor, AMBA bus(AHB-lite and APB), DMA and a SDRAM controller. Hence, it can be used to the hardware IP of SoC Chip. If the image processing algorithm akin to SURF is applied to the method proposed in this paper, it is expected that it can implement an efficient hardware design for target application.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.3
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• pp.619-626
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• 2019

The advances of semiconductor and circuitry technology dovetailed with nano processing techniques have further enhanced micro-miniaturization, sensitivity, longevity and reliability in MID(Medical Implant Device). Nevertheless, one of the remaining challenges is whether power can sufficiently and continuously be supplied for the operation of the MID. Self-powered MID that harvest biomechanical energy from human motion, respiratory and muscle movement are part of a paradigm shift. In this paper, we developed a rechargeable pacemaker through self-power generation with the triboelectric nanogenerator. We demonstrate a fully implanted pacemaker based on an implantable triboelectric nanogenerator, which act as a storage as well as active movement on a large-animal(dog) scale. The self-power pacemaker harvested from animal motion is 2.47V, which is higher than the required pacemaker device sensing voltage(1.35V).

• Journal of Korean Medical classics
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• v.19 no.2 s.33
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• pp.1-10
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• 2006

The main purpose of this essay is to shed light on the foundation of the core notion used in oriental medicine. Under the premise that the important notion of oriental medicine has its origin in the culture of the ancient china before B.C.$2^{\sim}1$, we will get to the source notion of oriental medicine by retrospecting the analogical thinking used in the course of forming the main notion of oriental medicine. For the source notion being in various domains, we must search so many domains for example the political system including the offical system, the economic system and so on. But in this essay, we will limit the domain concerned with combat.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.7 no.5
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• pp.134-139
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• 1998

There have been so manu study in the ultra-precision mirror finishing. Already Using system of experiments extract factors effecting surface roughness and find optimal machining conditions in 40${\mu}{\textrm}{m}$, 30${\mu}{\textrm}{m}$, 15${\mu}{\textrm}{m}$ abrasive film. So in this study, Using Abrasive film of 12~3${\mu}{\textrm}{m}$ extract factors effecting surface roughness and results are follows; Factor A(film feed) in 12${\mu}{\textrm}{m}$ and 5${\mu}{\textrm}{m}$ abrasive film, Factor A(film feed) and B(applied force) in 9${\mu}{\textrm}{m}$ abrasive film, Factor C(grinding speed) in 3${\mu}{\textrm}{m}$ abrasive film are main factor effecting surface roughness.