• 반도체디스플레이기술학회지
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• 제19권1호
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• pp.29-35
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• 2020

The cure characteristics of three kinds of naphthalene type epoxy resins(NET-OH, NET-MA, NET-Epoxy) with a 2-methyl imidazole(2MI) catalyst were investigated for preparing sheet epoxy molding compound(SEMC) for wafer level package(WLP) applications, comparing with diglycidyl ether of bisphenol-A(DGEBA) and 1,6-naphthalenediol diglycidyl ether(NE-16) epoxy resin. The cure kinetics of these systems were analyzed by differential scanning calorimetry with an isothermal approach, and the kinetic parameters of all systems were reported in generalized kinetic equations with diffusion effects. The NET-OH epoxy resin represented an n-th order cure mechanism as like NE-16 and DGEBA epoxy resins, however, the NET-MA and NET-Epoxy resins showed an autocatalytic cure mechanism. The NET-OH and NET-Epoxy resins showed higher cure conversion rates than DGEBA and NE-16 epoxy resins, however, the lowest cure conversion rates can be seen in the NET-MA epoxy resin. Although the NETEpoxy and NET-MA epoxy resins represented higher cure reaction conversions comparing with DGEBA and NE-16 resins, the NET-OH showed the lowest cure reaction conversions. It can be figured out by kinetic parameter analysis that the lowest cure conversion rates of the NET-MA epoxy resin are caused by lower collision frequency factor, and the lowest cure reaction conversions of the NET-OH are due to the earlier network structures formation according to lowest critical cure conversion.

• 한국정보처리학회논문지
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• 제6권5호
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• pp.1385-1392
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• 1999

본 논문에서는 웨이퍼를 세정하는데 사용되는 Wet Station 장비의 상태를 감지하고, 이를 간접적으로 제어하기 위한 모니터링 시스템의 설계에 관하여 기술한다. 대부분의 기존 모니터링 시스템은 하드웨어 및 소프트웨어에 의존되어 있다. 제시한 모니터링 시스템의 기본 설계 목표는 사용자의 편의성과 시스템의 이식성을 제공하는 것이다. 이러한 요구조건을 만족시키기 위하여, 본 논문에서는 IBM PC 호환 기종의 윈도우즈 NT 환경에서 GUL 기능과, TCP/IP 통신 프로토콜을 기본으로 한 EtherNet 보드를 이용하여 시스템을 설계하였다.

• 한국정보통신학회논문지
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• 제14권11호
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• pp.2419-2422
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• 2010

현재 선박용 통신 네트워크의 구성은 RS-422, RS-485, CAN, EtherNet 기반의 물리계층으로 NMEA0183, NMEA2000, MiTS(Maritime information Technology Standards) 프로토콜을 지원하도록 설계하고 있다. 특히, 기존의 선박통신은 별도의 전용선을 설치해야하는 단점이 있다. 그러나, 기존의 통신방식과 달리 전력선 통신은 선박내부에서 사용하고 있는 AC220V /DC24V을 그대로 사용하는 장점이 있다. 그러므로, 본 논문에서는 이러한 물리계층을 지원하도록 선박내부의 전력선 통신망을 설계하여 NMEA0183 프로토콜을 지원하는 DC-전력선 통신(DC-PLC : DC-Power Line Communication) 기반의 브릿지를 설계하고자 한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.577-578
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• 2010

현재 선박용 통신 네트워크의 구성은 RS-422, RS-485, CAN, EtherNet 기반의 물리계층으로 NMEA0183, NMEA2000, MiTS(Maritime information Technology Standards) 프로토콜을 지원하도록 설계하고 있다. 본 논문에서는 이러한 물리계층을 지원하도록 선박내부의 전력선 통신망을 설계하여 NMEA0183 프로토콜을 지원하는 DC-전력선통신(DC-PLC : DC-Power Line Communication) 기반의 브릿지를 설계하고자 한다.

• Asian-Australasian Journal of Animal Sciences
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• 제1권1호
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• pp.7-12
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• 1988

Twenty cows, by order of calving, were used in a completely randomized $2{\times}2$ factorial experiment. Variables were tow protein levels (14 and 18% crude protein) and concentration of fat (2 and 6% ether extract) in diets. Fat addition, via unprocessed whole sunflower seed, insured forage utilization in diets to meet energy requirement of cows. A total of 36 wks of lactation was subdivided into three 12-wk stages of lactation. Net energy lactation was set at 1.72, 1.57 and 1.42 Mcal/kg for each stage. Higher protein diets improved the efficiency of energy (FCM/net energy intake) which was particularly noted for diets containing high fat (85.7%). However, diets with low protein-high fat resulted in the lowest efficiency (67.7%). No difference in milk yield and butterfat was due to different levels and combinations of protein and lipid in diets. High protein diets depressed blood cholesterol and glucose compared to low-protein counterparts. Relative decline in milk production was slower for lower fat diets than for higher fat groups, especially mid to later stage of lactation. Results of this experiment tend to support our thesis on the synergistic effect of dietary protein and energy (lipid) upon efficiency of lactation.

• 한국식품조리과학회지
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• 제23권5호
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• pp.644-649
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• 2007

In this study a purified protein was prepared from pork meat. The product consisted of 0.5% moisture, 3.0% ash, 5.5% ether extract and 88.7% crude protein. Also, a meat oligopeptide mixture was prepared from a pepsin digest of the protein preparation. The two preparations were colorless and odorless powders with low fat contents. The nutritive values of the pork meat protein and oligopeptide mixture were estimated by two methods, one using biological value(BV) and the other employing net protein utilization(NPU) by the nitrogen balance method. The meat oligopeptide mixture showed an excellent nutritive value by both methods. The true digestibilites of both the pork meat protein and the oligopeptide mixture were more than 98%. The above results indicate that the oligopeptide mixture is an excellent material as a dietary nitrogen source for many purposes.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.473-475
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• 2006

FieldBus communication systems in industrial wired and wireless network may cause the degradation of the TCP performance due to the racket loss. TCP is particularly targeted at the wired networks, a packet loss is assumed to be caused by the network congestion. As a result, the performance of TCP decreases significantly when used over networks that exhibit a high bit error rate. In order to solve this problem, this paper designs and implements the WFSnoop mechanism which offers a fast local retransmission. The proposed mechanism does not require any changes in customer premises. Base on the simulation in the wired and wireless network environment, we analyzed the performance of the WFSnoop mechanism.

• Asian-Australasian Journal of Animal Sciences
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• 제14권10호
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• pp.1400-1404
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• 2001

$Holstein\;{\times}\;indigenous$ multiparous dairy cows were offered diets with increasing roughage neutral detergent fiber (NDF) contents to determine the effects on intake, milk yield and compositions. Roughage NDF contents were 15, 18, 21 and 24% dry matter (DM), and concentrate NDF content was 10% DM. Experimental treatments were isonitrogenous and isocaloric diets. Maximum and minimum temperature humidity index during the experimental period were 85.9 and 76, respectively. Intakes of DM, crude protein and net energy, 4% fat corrected milk, milk protein and average daily gain decreased with increasing roughage NDF contents (p<0.05). Intakes of ether extract (p<0.01) and dietary NDF (p>0.05) and milk fat (p<0.01) increased with increasing roughage NDF contents. The results support the conclusion that higher DM intake, optimal milk yield and compositions can be maintained with lower roughage NDF diets for dairy cows under tropical conditions.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 춘계학술발표대회
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• pp.1525-1528
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• 2005

본 논문에서는 초고속인터넷 망에서 VoIP 서비스 제공시 적용할수 있는 망별 QoS 제공기술을 소개하고 이러한 QoS 기술들을 이용하여 통화품질을 개선할수 있는 방안을 제시하였다 . 초고속인터넷망의 QoS 기술은 적용방법에 따라 다양한데 본 논문에서는 IEEE 802.1P, IP TOS 기술, DIFFFSERV 기술, Traffic classification & Queuing, ATM QoS 기술 등을 소개하고 이러한 기술을 사용하여 초고속인터넷망중 Metro EtherNet 망, ADSL 망을 중심으로 VoIP 서비스시 성능을 향상 할 수 있는 방안을 제시하였다

• 설비공학논문집
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• 제13권8호
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• pp.787-795
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• 2001

An experimentation on the on-line fault detection and diagnosis(FDD) system has been performed with HVAC system in he experimental building constructed inside the large scale environmental chamber. Personal computer with a home-made FDD program by pattern recognition method utilizing artificial neural network was connected on-line via Ether-net TCP/IP to the supervisory control server for HVAC system. The FDD program monitored the HVAC system by 1 minuted interval. The results showed that he FDD program detected the sudden or abrupt faults such s those in fans, sensors and heater, etc.