• JSTS:Journal of Semiconductor Technology and Science
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• v.4 no.1
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• pp.45-51
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• 2004

We have proposed a new shallow trench isolation (STI) process using flowable oxide (F-oxide) chemical vapor deposition (CVD) for DRAM application and it was successfully developed. The combination of F-oxide CVD and HDP CVD is thought to be the superior STI gap-filling process for next generation DRAM fabrication because F-oxide not only improves STI gap-filling capability, but also the reduced local stress by F-oxide in narrow trenches leads to decrease in junction leakage and gate induced drain leakage (GIDL) current. Finally, this process increased data retention time of DRAM compared to HDP STI. However, a serious failure occurred by symphonizing its structural dependency of deposited thickness with poor resistance against HF chemicals. It could be suppressed by reducing the flow time during F-oxide deposition. It was investigated collectively in terms of device yield. In conclusion, the combination of F-oxide and HDP oxide is the very promising technology for STI gap filling process of sub-100nm DRAM technology.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.8
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• pp.1940-1946
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• 2013

The Object of smart healthcare service is focused on preventive healthcare and wellness; It also aims for the user oriented active service. Recently, Smart healthcare using smart-phone can support various services like basal physical fitness, caloric intake, checking heartbeat and so on. However, it has not yet commercially viable service model because of incomplete personal health devices standardization. We designed and implemented Android smart healthcare Manager to support ISO/IEEE 11073 by Bluetooth HDP using oximetry System.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.313-314
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• 2015

홈 헬스케어 서비스를 위해서는 다양한 개인건강기기를 기반으로 사용자의 신체 상태를 측정하고 측정된 값을 적절하게 전송하는 시스템간의 통신과 인터페이스가 매우 중요한 요소이다. 그리고 개인 건강기기의 데이터를 이용한 상호운용성 확보를 위해서는 홈 헬스케어 의료기기와 홈 헬스케어 서버/게이트웨이 간의 ISO/IEEE 11073 표준을 만족해야 한다. 따라서, 본 논문에서는 스마트 TV환경 기반의 헬스케어 서비스를 제공하기 위해, 홈 헬스케어 시스템에서 Bluetooth HDP를 통해 개인 건강기기와의 IEEE 11073 표준 연결성에 대해 연구하였다.

• Archives of design research
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• v.20 no.2 s.70
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• pp.65-76
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• 2007

The primary purpose of this study was to evolve integrated design process for Experiential Design which is based on the former study, 'The Influence of Cognitive Factors on the Creative Abilities in Design'. Experience is a transformation factor to all of the design processes, which has three phase of problem solving; Input, Process, and Output. We regard Experiential Design is a transforming process from concept to experience, and set up a mode) of Holistic Design Process (HDP), which consists of four domains: Four Causes, Thinking Modes, Sensory Modalities, and Creative Abilities. Revolving Sensory Modalities (SM), Creative Abilities (CA), and Thinking Modes (TM) around Product Design Specification (PDS) through a design process, Design Concepts ripen and mature into Externalization. Each component of Experiential Design (TM, SM, and CA) turns around the PDS. Here, experience is first perceived by the five senses. Then, the knowledge is formed, and the CA works for a problem solving. And TM controls all of these procedures. We regard these are a phenomenon of Experiential Design. The HDP can be helpful to develop valuable solutions and create a good experience.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.331-333
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• 2003

본 논문에서는 802.11을 기반으로 한 무선 링크에서 인터넷 상의 대표적인 전송계층 프로토콜인 TCP(Transmission Control Protocol)와 HDP(User Datagram Protocol)의 성능을 비교한다. 또한 이들 프로토콜이 무선 환경에서 보이는 문제점을 지적하고 원인을 분석한다. 무선 네트워크의 용량은 유선 네트워크와 다르며, 따라서 유선 네트워크 용량을 기반으로 설계된 TCP는 불안정하게 작동한다. 본 논문에서는 주목할만한 전송 프로토콜의 병목현상을 나타내는 원인으로 MAC(Medium Access Control)에 의해 채널을 잡기 위한 경쟁이 심각함과 전송 계층 프로토콜의 네트워크 용량 예측이 올바르지 않음을 지적하고, TCP와 HDP를 비교하여 무선 망에서도 네트워크 상황에 적응하는 기법이 중요함을 확인한다.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2007.04a
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• pp.151-152
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• 2007

최근들어 Device 크기가 100nm 이하로 줄어듦에 따라 High Density Plasma Chemical Vapor Deposition(HDP-CVD) 기술로는 100nm 이하의 gap에 Aspect ratio가 6:1 이상 되는 STI(Shallow Trench Isolation) 구조를 Void 없이 채우는 것이 불가능해 지고 있다. 이를 극복하기 위하여 여러 방면으로 연구가 수행되어지고 있다. 그 방법 중의 하나인 Dep/Etch/Dep Cycle이 이번 연구에서 사용되었으며, 일반적인 HDP CVD보다 더 낮은 압력에서 증착과 식각이 수행되었다. 그 결과 다른 여러 방법들보다 좋은 막질을 얻을 수 있었으며, Gap fill 성능을 향상 시킬 수 있었다.

• Proceedings of the Korean Vacuum Society Conference
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• 2002.02a
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• pp.128-128
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• 2002

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.11
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• pp.2615-2620
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• 2013

Recently consumers pursue optimized health condition and high leveled quality of life through active promotion and prevention activity of health as the importance of health during daily life is emerged to meet the demand of aging society. Thus healthcare service is evolved into smart healthcare stage using various type of smart devices depending upon the needs of consumers. However the connectivity and interoperability among individual medical devices and smart devices are insufficient, thus data accumulation through individual medical devices is also insufficient. This thesis suggest the methodology to establish the connection among Bluetooth HDP and individual medical devices based on smart TV in addition to the monitoring of biometrics.

• Natural Product Sciences
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• v.19 no.1
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• pp.54-60
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• 2013

Rhus verniciflua Stokes (Anacadiaceae) is a plant that is native to East Asian countries, such as Korea, China, and Japan, and it has been found to exert various biological activities including antioxidative, anti-aggregatory, anti-inflammatory, anti-mutagenic, and apoptotic effects. Sulfuretin is one of the major flavonoid component isolated from the heartwood of R. verniciflua. Reactive oxygen species (ROS), produced via dental adhesive bleaching agents and pulpal disease, can cause oxidative stress. In the present study, we isolated sulfuretin from R. verniciflua and demonstrated that sulfuretin possesses cytoprotective effects against hydrogen peroxide ($H_2O_2$)-induced dental cell death. $H_2O_2$ is a representative ROS and causes cell death through necrosis in human dental pulp (HDP) cells. $H_2O_2$-induced cytotoxicity and production of ROS were blocked in the presence of sulfuretin, and these effects were dose dependent. Sulfuretin also increased heme oxygenase-1 (HO-1) protein expression. In addition, to determine whether sulfuretin-induced HO-1 expression mediated this cytoprotective effect, HDP cells were cotreated with sulfuretin in the absence or presence of SnPP, an inhibitor of HO activity. Sulfuretin-dependent HO-1 expression was required for suppression of $H_2O_2$-induced HDP cell death and ROS generation. These results indicate that sulfuretin-dependent HO-1 expression was required for the inhibition of $H_2O_2$-induced cell death and ROS generation. In addition, sulfuretin may be used to prevent functional dental cell death and thus may be useful as a pulpal disease agent.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.9
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• pp.1970-1976
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• 2012

Home healthcare system has lot of things to do for the integration with medical instruments in the sense of standardization. We will design and implement mobile healthcare system based on smart gateway thru adaptation of ISO/IEEE 11073, and HL7 standard. And also we are willing to research heart rate monitor, pulse-oxygen meter and ECG monitor in order to develop mobile healthcare system for medical appliance. We studied the connection of standard medical devices, i.e, continua health alliance under the Android 4.x Bluetooth HDP(Health Device Profile) environments. We also tried to implement healthcare system which can support diagnosis for healthcare provider and user based on HL7 standard.