• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.43-43
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• 2011

BN(Boron Nitride)은 온도와 압력 조건에 따라 안정한 상이 sp3 결합인 cubic 구조의 BN(cBN)과 sp2 결합인 hexagonal 구조의 BN(hBN or tBN)으로 나뉘는데, 이 중 cBN은 우수한 기계적, 물리적, 화학적 특성으로 인해 박막 분야에서 매우 높은 응용가능성을 지니고 있다. 하지만 cBN 박막의 합성과정에서의 필수적인 요소인 높은 압축잔류응력은 cBN을 응용분야에 적용하는데 있어 한계점으로 계속 남아 있었다. 그동안 이러한 잔류응력을 감소시키기 위해 열처리, 이온 주입, 제 3의 물질 첨가 등 다양한 관점에서 접근한 연구들이 진행되어 왔다. 본 연구에서는 cBN 합성과정에서 잔류응력을 감소시키기 위한 방법으로 수소를 첨가하였고, 그에 따른 잔류응력의 변화를 분석하고, 그 과정에서 잔류응력의 형성에 수소가 어떤 역할을 하는지 규명하고자 하였다. cBN 박막은 hBN을 target으로한 unbalanced magnetron sputtering를 사용하여, 실리콘 wafer 위에 합성하였다. 증착압력은 1.3mTorr로, 수소의 첨가량을 증가시키며 잔류응력과 cBN fraction을 관찰하였다. cBN fraction은 FTIR로 분석하였고, 잔류응력은 실리콘 strip의 in-situ 곡률측정법으로 계산하였다. cBN 박막의 조성과 구조 분석, 수소의 역할 규명을 위해 RBS 및 HRTEM을 이용하였다.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.396-396
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• 2011

유연기판(Flexible) CIGS 박막태양전지는 금속 및 폴리머 기판을 이용하고 roll-to-roll 공정에 적합하기 때문에 유리기판을 이용한 태양전지에 비해 가볍고 공정단가를 절감할 수 있다. 그러나 기존의 soda-lime 유리 기판에 비해 금속 및 폴리머 기판을 사용시 Na 공급의 부재로 CIGS 박막 태양전지는 Voc, FF의 감소로 효율이 감소한다. 본 연구에서는 기존 유리기판과 유사한 Na의 공급을 위해 soda lime 유리 박막(SLGTF)을 Mo 후면전극 증착 전에 도입하였으며, CIGS 박막 및 태양전지를 제조함으로써 SLGTF의 영향을 분석하였다. SLGTF는 rf magnetron 스퍼터링법으로 두께를 조절하여 철강기판과 Mo 사이에 증착하였다. 본 연구에서는 SLGTF의 두께에 따른 CIGS 박막의 미세구조 및 Na 함량의 변화를 기존의 유리기판 및 SLGTF이 없는 철강기판과 비교하여 분석하고자 하였다. CIGS 박막은 3-stage 진공증발법으로 증착하였으며, CIGS 박막의 우선배향성(texture) 변화를 관찰하기 위해 XRD (X-ray Diffraction)를 이용하였고 Na 양을 확인하기 위해 SIMS(Secondary Ion Mass Spectroscopy)를 사용하였다. SLGTF의 도입 및 두께의 변화에 따라 CIGS 박막의 우선배향성(texture) 및 Na의 양에 큰 변화가 있었으며, 이러한 변화가 CIGS 태양전지 셀 효율에 미치는 영향을 분석하였다.

• Food Science of Animal Resources
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• v.37 no.1
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• pp.38-43
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• 2017

This study was conducted to investigate the physical and sensory properties of ice cream containing fermented pepper powder. Three ice cream formulas were manufactured: 1, control; 2, supplemented with 0.1% fermented pepper powder; and 3, supplemented with 0.2% fermented pepper powder. Formulas 2 and 3 had significantly higher viscosity and lower overrun than formula 1 (p<0.05). Additionally, ice creams supplemented with fermented pepper powder were harder and maintained their forms longer than the controls. 0.2% fermented pepper powder added ice cream had no pungency as much as that of control and overall sensory attribute was not significantly different from control. Therefore, ice cream containing fermented pepper powder maintained physical and sensory properties similar to the controls, and maintenance was better. It means fermented pepper powder ice cream can be utilized as the material of functional food (dessert).

• Korean Journal of Plant Taxonomy
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• v.41 no.2
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• pp.164-170
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• 2011

Two naturalized plants (Euphorbiaceae) were recorded from Busan Metropolitan City and from the Jeju Special Self-Governing Province. Euphorbia heterophylla L. (A-me-ri-ka-dae-geuk) was found in a park near Suyeong-gang, Allak-dong, Dongnae-gu, in Busan Metropolitan City. This species is distinguished from E. dentata by its alternating leaves of main stem and glands of involucres with a circular opening. Euphorbia hirta L. (Teol-ttang-bin-dae) was found in Yerae village, Yerae-dong, Seogwipo-si, in Jeju Special Self-Governing Province. It is distinguished from E. hypericifolia as it has capsules with hairs.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.3
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• pp.201-207
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• 2009

As the existing backdoor worked at user mode, which is application mode, it was possible to check the existence of backdoor by the integrity check of system file. However, for the backdoor using kernel module, it is impossible to check its existence by the integrity check of system file. Even various programs were presented to protect this LKM Kernel backdoor, there is limitation in protection as they examine the changes on the system Call Table. This study, recognizing the danger of invasion through such LKM Kernel backdoor, will provide alternative for the limitation which the existing integrity check couldn't prevent intrusion through Kernel backdoor.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.461-465
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• 2002

When general software system wants to need continuous Dept of Software Engineering by discovery of specification imperative sentence in some program, programmer analyzes program through practice orbit chase of program about value of input data. This paper that see therefore applies object intention program Slicing to existent program Slicing method, and express practice orbit of program in object intention subordination graph and show process that become Slicing. Proposed algorithm defenses crab extension is possible and can be used advantageously in case program is developed gradually as well as.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.4
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• pp.1015-1022
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• 2010

USN(Ubiquitous Sensor Network) environment that provides the service measured from sensors in real-time the information is delivered to application service. However, domestic service, application service provider environment between providers and users, most of the research are on the service platform architecture, and process the information detected by sensors between the providers of standard services platform architecture, which is a very weak level. In this paper, we proposed new service architecture though analysis of the OGC SWE(Sensor Web Enablement) with standards and research analysis of domestic standards. And we designed and implemented to each component of provider side.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.1
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• pp.63-70
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• 2011

This paper presents the design and operating characteristics of the novel cylindrical linear motor which is designed for the long stroke XY stage. In the long stroke structure, the air gap is changed by the distortion and bending effects, and it makes additional position error in the XY stage. In order to consider the distortion and bending effects of the long stroke, the field part of the cylindrical linear motor is designed as an open structure, and the stroke is supported by the bridge guide which is positioned in the open field part. The mechanical bridge guide can reduce the bending effects of the stroke and can keep a constant air gap. The detailed design process of the proposed cylindrical linear motor is presented in this paper. The proposed motor is analyzed by the 3D FEM technology. The practical XY stage which uses the proposed motor is tested to verify the propose novel cylindrical linear motor. The FEM and experimental results show the effectiveness of the proposed motor.

• The KIPS Transactions:PartD
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• v.8D no.3
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• pp.193-202
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• 2001

Currently, the components of the GIS have been physically run on a stand-alone system. With rapid advances in internet technology, GIS users require that they are able to not only access they heterogeneous and remote GIS database as well as their own information, but also share them. However, these GIS have the defects that can not handle formats different from own data format. Therefore, in this paper, we propose to integrate the components of the heterogeneous and remote GIS using CORBA in order to solve these problems, which is a distributed object technology, the mediator and wrapper technology in client and server layers.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1164-1170
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• 2010

IPTV hasn't fulfilled the expectations that it will substitute existing digital broadcasting service and serve new type of services such as interactive and multi-channels. Today's IPTV service just seems to change existing service platform to new one. In this situation, Open IPTV service has been on the rise, which make it possible for consumers to choice contents regardless of contents providers. However, the integration of variety service platforms such as rights protection solution is essential to provide Open IPTV service. In this paper, authoring and consuming system for package contents based on MPEG-21 Multimedia Framework which is developed for distributing media resources.