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이진애 인제대학교 낙동강환경연구소 1993 심포지움(인제대학교 부설 환경연구소 발표논문집) Vol.- No.2
해조의 중금속 축적 특성을 조사하기 위하여 연안에서 많이 자라고 있는 우점종들의 중금속 농도를 조사하였다. Fe는 83 ~ 505 ㎍·g^-1 dry weight, Cu는 1.4 ~ 5.3 ㎍·g^-1 dry weight, Zn은 10.4 ~ 73.9 ㎍·g^-1 dry weight의 범위였으며, Cd은 측정되지 않았다. 양식미역의 경우 계절에 따른 변이는 없었으나 엽상부가 줄기부나 중륵부보다 Fe과 Zn의 함량이 높았다. 중금속을 첨가한 용액에서 배양한 시료는 현저히 증가한 중금속 농도를 나타냈다. 중금속 흡수와 유출양상을 구멍갈파래 시료를 이용하여 정리하였다. Cu와 Zn의 상대함량은 처리시간과 첨가농도에 따라 비례하여 증가하면서 해조 체내에 축적되었다. Hg의 흡수는 배양기간 24시간 동안 여러 단계를 보여주었다.
Prediction enhancement of the J-lead interconnection reliability of land grid array sockets
이진애,박형욱 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.5
The solder joint is a key component in land grid array (LGA) sockets. A simplified solder joint has been widely used in finite elementmodel (FEM) computations because the J-lead interconnection solder joint is relatively complex. Therefore, there are discrepancies betweenthe physical phenomenon and FEM simulations. In this study, an alternative method to simulate the J-lead interconnection solderjoint through an interface program using surface evolver software is presented. Simulations of the J-lead interconnection solder joint wereimproved to reduce the mismatch between the actual physical shape and the simplified finite element models that are typically used topredict component reliability. To perform these simulations, an interface program capable of simulating solder interconnections fortwelve different pad–solder combinations was developed. Predictions of J-lead interconnection solder joints were carried out using theinterface program. Geometric comparisons between experimental data and predictions showed good agreement, with the exception ofwetting height. To evaluate the prediction accuracy of the simulated J-lead solder joints, FEM analysis was performed for the static loadand the thermal cycle.`
이진애,조경제,권오섭,정익교,문병용 ( Jin Ae Lee,Kyung Je Cho,O Seob Kwon,Ik Kyo Chung Byung Yong Moon ) 한국하천호수학회 1994 생태와 환경 Vol.27 No.1
Primary production of phrtoplankton was investigated in Naktong estuarine ecosystem monthly from October 1991 to September 1992 using carbon-14 uptake method. In spite of large spatial and temporal variation, there was a primary peak of net phytoplankton production in spring through early summer. The productivity was minimum of 543mg C·m^-2.day^-1 in September and maximum of 4112mg C·m^-2·day^-1 in April. The seasonal changes in factors regulating production in Naktong estuarine area were proposed based on the annual patterns of physical variables and nutrient concentrations. The late spring and early summer flowering of biomass and net production of phytoplankton was explained as the result of the balance between light and temperature. The high level of Production terminated in summer as the result of water clarity. Nutrient limitation may not be important, because of high nutrient level year around in this eutrophicated estuarine area.
Photoperiodic effects on gametogenesis in Laminaria saccharina L.(Lamour.) (Phaeophyta)
Lee, Jin-Ae 인제대학교 1991 仁濟論叢 Vol.7 No.1
갈조인 다시마종(Laminaria saccharina)의 배우자 형성 과정에 미치는 광주기의 영향을 하루에 식물이 받는 총광량을 일정하게 조절하면서 실험실에서 고찰하였다. 다시마의 지낭반에서 방출된 중성 포자로부터 계절적으로 배양 실험한 결과, 암배우체 원세포의 크기 증가, 사상체의 암배우체의 길이 생장 및 배우체의 생식 과정의 성공률 등은 광주기의 영향을 받았다. 발생과정 중 세포의 분열을 요하는 과정은 일장이 긴 조건에서 더 좋은 반응을 나타냈다. 발아율과 암배우체의 다산력은 광주기의 영향을 받지 않았으며, 주로 계절적 일장의 변화에 민감하게 반응하였다. Photoperiod effects on induction of gametogenesis in Laminaria saccharina L. (Lamour.) were investigated in laboratory experiments where daily quantum dose were held fixed. Genuine photoperiodic effects on the size of female primary cells, length of female gametophytic filaments and reproductive success of gametophytes were found with meiospores collected in autumn, winter and spring. The developmental stages, involving cell devision, responded to increased daylengths. There was no evidence for photoperiod-related effects in germination success or fecundity. Daylength responses of female gametophytes differed with respect to seasonal daylength changes.
Recent Review of Nonlinear Conditional Mean and Variance Modeling in Time Series
황선영,이진애 한국데이터정보과학회 2004 한국데이터정보과학회지 Vol.15 No.4
In this paper we review recent developments in nonlinear time series modeling on both conditional mean and conditional variance. Traditional linear model in conditional mean is referred to as ARMA(autoregressive moving average) process investigated by Box and Jenkins(1976). Nonlinear mean models such as threshold, exponential and random coefficient models are reviewed and their characteristics are explained. In terms of conditional variances, ARCH(autoregressive conditional heteroscedasticity) class is considered as typical linear models. As nonlinear variants of ARCH, diverse nonlinear models appearing in recent literature including threshold ARCH, beta-ARCH and Box-Cox ARCH models are remarked. Also, a class of unified nonlinear models are considered and parameter estimation for that class is briefly discussed.
Rhodopseudomonas sphaeroides의 질소 동화작용에 미치는 simazine의 영향
이혜주,이진애,박인호,선우양일 한국미생물학회 1989 미생물학회지 Vol.27 No.3
The effects of simazine [2-chloro-4, 6-bis(methylamino)-s-triazine] on in vivo nitrogenase, glutamine synthetase, glutamate synthase, and glutamate dehydrogenase which are important in nitrogen assimilation of Rhodopseudomonas sphaeroides were investigated. Simazine inhibited the synthesis of nitrogenase and glutamine synthetase. The activity of glutamine synthetase in crude extracts of Rhodopseudomonas sphaeroides is less inhibited by simazine than that of glutamate synthase and glutamate dehydrogenase. These results suggest the possibility that simazine inhibits photosynthetic activity and so inhibits the synthesis of nitrogenase and glutamine synthetase in Rhodopseudomonas sphaeroides. 광합성 세균인 Rhodopseudomonus sphaeroiders의 질소고정 효소 합성 및 암모니아 동화 경로에 중요한 glutamine synthetase(GS), glutamate synthase(GOGAT) 및 glutamatc dehydrogenase(GDH) 활성에 미치는 TriazinerP 제초제인 simazine의 영향을 조사하였다. 배양중에 simazine을 처리할 경우 성장 및 in vivo 질소고정효소의 합성 및 GS의 합성이 크게 저해되었다. 그리고 정상 배지에서 배양한 Rp. sphaeroides의 GOGAT 및 GDH의 활성이 GS의 활성보다 simazinc에 의해 더 큰 저해를 받았다. 이상의 결과는 simazine이 Rp. sphacroides의 광합성 과정을 억제하여, 질소고정효소의 합성을 저해하며 이로인해 GS의 합성이 저해될 가능성이 있음을 시사한다고 하겠다.