• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 추계학술대회 논문집
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• pp.378-381
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• 2008

The buckling behavior of cylindrical shape-memory alloy and aluminum tube is investigated at room temperature using a split Hopkinson pressure bar and an Instron hydraulic machine with a specially designed recording system. The shape-memory alloy at superelastic property regime buckles gradually in quasi-static loading, and fully recovers upon unloading. However, the buckling of aluminum tube is sudden and catastrophic, and shows permanent deformation. This gradual buckling of shape-memory alloy is associated with the forward and reverse transformation of stress-induced martensite and seems to have a profound effect on the unstable deformation of tube structures made from shape-memory alloy.

• 인지과학
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• 제7권3호
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• pp.61-80
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• 1996

본 논고에서는 기억 현상으로서의 정서와 기억에 미치는 정서 효과에 관한 연구들을 살펴보았다.기억과 정서사이의 다양한 연구들 중에서 정서를 수반하는 사건에 대한 기억, Bower(1982)의 의미망 모형과 제한점,암묵적 기억과 정서 사이의 관계, 그리고 정서가 자서전적 기억에 미치는 영향 등을 알아 보았다.이들을 종합해 보면,정서란 단지 하나의 하위 마디로서 의미망에 표상되는 것이 아니라,좀더 상위 수준의 내포적 의미 체계에 저장되어 여러기억 현상들에 영향을 미칠 수 있을 것이라는 점을 시사한다.

• Journal of Ginseng Research
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• 제20권1호
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• pp.7-14
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• 1996

This study was performed to examine the effect of red ginseng total saponin and extract on memory in mice using one trial step-down type passive avoidance method. Red ginseng total saponins (No. 1: PD/PT ratio=1.24, No. 2: PD/PT ratio=1.47) were prepared with the different mixing ratio by using the parts of red ginseng. In single administration of total saponin No. 1 (100 mg/ kg, bw) or No. 2 (50 mg/kg, bw) increased the latency time as compared with control group but was not statistically significant. Treatment of total saponin No. 1 (50 mg/kg, bw) for 10 days produced an increase of latency time but was not statistically significant. In scopolamine-induced memory deficient mice total saponin No. 1 (50 mg/kg, bw) and No. 2 (100 mg/kg, bw) significantly improved the latency time. These results show that red ginseng total saponin may improve the memory of sco-polamine-induced memory deficient mice and have nootropic activity.

• Macromolecular Research
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• 제16권7호
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• pp.644-650
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• 2008

This study examined the effect of nanoclays on the shape memory behavior of polyurethane (PU) in fibrous form. A cation was introduced into the PU molecules to disperse the organo-nanoclay (MMT) into poly($\varepsilon$-caprolactone) (PCL)-based PU (PCL-PU). The MMT/PCL-PU nanocomposites were then spun into fibers through melt-processing. The shape memory performance of the spun fibers was examined using a variety of thermo-mechanical tests including a new method to determine the transition temperature of shape memory polymers. The MMTs showed an improved the fixity strain rate of the MMT /PCL- PU fibers but a slight decrease in their recovery strain rate. This was explained by the limited movement of PU molecules due to the presence of nanoclays. The shape memory performance of the MMT/PCL-PU fibers was not enhanced significantly by the nanoclays. However, their recovery power was improved significantly up to a strain of approximately 50%.

• 한국생활과학회지
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• 제21권4호
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• pp.705-714
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• 2012

This study investigated the relationships among emotion knowledge, negative emotionality, and autobiographical memory in a sample of 131 three- to five-year-old children attending day care center in seoul. The collected data were analyzed using simple regression and hierarchical multiple regression. The main results of this study were as follows. First, children's emotion knowledge exerted negative effects on their negative emotionality. Second, children's negative emotionality had a positive influence on their autobiographical memory. Finally, the effect of children's emotion knowledge on their autobiographical memory was partially mediated by their negative emotionality. These findings provide a preliminary evidence that children's emotion knowledge and negative emotionality may predict their autobiographical memory.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.167-168
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• 2007

Design Rule이 작아짐에 따라 Transistor performance 향상을 위한 여러 방안중 SEG 공정이 적용되고 있으며 이에 따른 Transistor 특성 연구 결과이다. SEG공정 적용시 SEG Profile에 따라 Transistor의 Short Channel Effect 열화가 발생하였고 그 원인은 Sidewall Facet발생으로 추정되며 이를 개선시 Tr 특성이 개선됨을 확인하였다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.58-61
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• 2010

본 논문에서는 I/O Filter Driver 와 NAND FLASH Memory의 적용을 통한 HDD 저장장치의 느린 I/O 성능을 개선하기 위한 방법에 대해 연구했다. 반도체 부품으로서 빠른 I/O 성능을 보이는 NANDFLASH Memory의 적용과 이를 구동시키기 위한 Filter Driver (Device Driver)를 적용했으며, 이를 통해 HDD 저장장치의 향상된 I/O성능을 분석하고 개선하는 방법을 제안한다.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2004년도 학술대회지
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• pp.167-171
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• 2004

The Spar platform with deep draft is characterized as effective structure in extreme wave condition, which has larger natural period than that of waves in sea. In this paper, the time simulation of motion responses of Spar with catenary mooring line is presented in irregular waves. The memory effect is modeled by added mass at infinite frequency and convolution integrals in terms of wave damping coefficients. The added mass, wave damping coefficients and wave exciting forces are obtained from three-dimensional panel method in the frequency domain. The motion equations are consisted of forces for inetia, memory effect, hydrostatic restoring, wave exciting and mooring line. The forces of mooring line are modeled as quasi-static catenary cable.

• E2M - 전기 전자와 첨단 소재
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• 제10권9호
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• pp.876-880
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• 1997

In this paper we investigated the transcription of liquid crystal (LC) alignment method by using memory effect of nematic(N) LCon polymide(PI) surface with side chain as for non-rubbing alignment techniques. That the monodomain alignment of aligned NLC is observed by microscope textures in the cells on PI surface with side chain. We obtained that the pretilt angle of NLC are generated about 3.7$^{\circ}$on PI surface. We suggest that the LC alignment by using transcription alingnment method is attributed to memory effect of NLC on PI surface.

• 열처리공학회지
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• 제15권2호
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• pp.65-69
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• 2002

$Llo{\rightarrow}Ni_5Al_3$ reordering and related properties in Ni-Al alloys consisting of 64-65at%Ni are characterized by X-ray diffraction, shape memory effect and damping capacity. Formation of $Ni_5Al_3$ takes place by simple ordering of atoms with a continuous increase in c/a ratio. As a result, degradation of shape memory effect and damping capacity is observed after short time annealing at $200-300^{\circ}C$.