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김창식,김우갑,김창환,Kim, Chang-Shik,Kim, Woo-Kap,Kim, Chang-Whan 한국현미경학회 1994 Applied microscopy Vol.24 No.4
The corneal formation of compound eye of Pieris rapae L., which was mostly made during pupal stage, was morphologically investigated with light microscope, scanning electron microscope and transmission electron microscope. The regeneration of the microvilli were found on the surface membranes of corneagen cells and retinular pigment cells of preommatidium after apolysis pupal cuticle. The microvilli were finally differentiated to corneal nipples of the ommatidium. The corneal cuticle was generated on the superficial layer of the preommatidium from corneagen cells and retinular pigment cells. The corneal process was also formed under the cuticular layer from the corneagen cells. The pore canal was appeared within the cuticular layer and connected with the retinular pigment cell as if the root of interommatidial hair was connected. The interommatidial hair was projected randomly among the ommatidial facets and cornal nipple was arrayed regular on the ommatidial facets. The cornea was convex lens and the refracting power by its convex shape was 4 diopter.
Topex/Poseidon 고도계 자료를 이용한 북동 아시아 해역의 조석 산정
김창식,이종찬,Kim, Chang-Shik,Matsumoto, Koji,Ooe, Masatsugu,Lee, Jong-Chan 한국해양학회 2001 바다 Vol.6 No.1
Topex/Poseidon(T/P)고도계 자료를 조석 수치 모델에 혼합하여 북동 아시아 해역의 $M_2,\;S_2,\; K_1$, 및 $O_1$ 분조를 $5'{\times}5'$ 분해능으로 계산하여, 북동 아시아의 조석을 산정하였다. Blending 방법에 사용되는 가중 인자 값에 대한 모델반응을 검토하기 위해 $M_2$ 분조만을 고려한 수치 실험이 수행되었으며, 수치 실험을 통해 T/P 자료를 정확히 재현하되 혼합함으로써 발생하는 잡음을 줄이기 위해 가중 인자 값은 수심의 평방근에 반비례하도록 설정하였다. T/P자료에서 구한 $M_2,\;S_2,\; K_1$, 및 $O_1$ 분조를 동시에 혼합한 수치 모델 결과는 연구 해역 내의 모든 T/P궤도 자료와 비교되었다. 진폭 오차와 지각 오차의 평균은 거의 0으로 나타났다. 진폭 오차의 표준 편차는 2 cm 내외였으며, 지각오차의 표준 편차는 $10^{\circ}$보다 작았다. T/P자료를 혼합한 모델 결과는 특히 얕은 수심(h<250m)의 T/P 궤도 자료와 거의 일치하는 것으로 나타났다. 그러나 T/P 자료만으로부터 계산된 진폭과 지각은 깊은 수심 해역에 대해서는 불합리한 공간 변화를 보이는 반면, 이들 자료를 동화시킨 모델 결과는 T/P 자료와는 차이를 보이나 합리적인 진폭과 지각의 공간 분포를 보였다. 한편 T/P자료를 혼합한 모델 결과는 자료 동화에 사용하지 않은 연안 관측 자료와도 비교적 잘 일치하였다. Tidal computations of $M_2,\;S_2,\; K_1$ and $O_1$ constituents in the northeast Asian sea are presented by blending the Topex/Poseidon (T/P) altimeter data into a hydrodynamic model with $5'{\times}5'$ resolution. A series of sensitivity experiments on a weighting factor, which is the control parameter in the blending method, are carried out using $M_2$ constituent. The weighting factor is set to be in inverse proportion to the square root of water depth to reduce noises which could occur in data-assimilative model by blending T/P data. Model results obtained by blending the T/P-derived $M_2,\;S_2,\; K_1$ and $O_1$ constituents simultaneously are compared with all T/P-track tidal data; Average values of amplitude and phase errors are close to zero. Standard deviations of amplitude and phase errors are approximately 2 cm and less than 10 degrees respectively. The data-assimilative model results show a quite good agreement with T/P-derived tidal data, particularly in shallow water region (h<250m). In deep water regions, T/P-derived tidal data show unreasonable spatial variations in amplitude and phase. The data-assimilative model results differ from T/P-derived data, but are improved to show reasonable spatial variations in amplitude and phase. In addition, the T/P-blended model results are in good agreement with coastal tide gauge data which are not blended into the model.
김창식,Kim, Chang-Shik 한국현미경학회 1995 Applied microscopy Vol.25 No.4
Ultrastructure of stemmata(larval eye) of 5th-instar larval in cabbage butterfly, Pieris rapae L, was morphologically investigated with light microscope, scanning electron microscope and transmission electron microscope Six stemmata are on each side of the head. Stemmata V and VI have a Y-shaped sulcus on the surface of their corneal lenses, the others have a columnar shaped process and smooth globular surface. The visual type of stemmata is resembled a single ommatidium of compound eye. The dioptric apparatus are a biconvex shaped cornea and crystalline cone. As a photoreceptor, each stemmata consists of 7 retinular cells arranged into 2 tiers. The first ceil tier of 3 distal retinular cells has formed a V-shaped cup rhabdome and the second cell tier of 4 basal retinular cells has formed a H-shaped fused rhabdome. Each retinular cell filled with pigment granules and contained multivesiclular bodies, coated vesicle and common organelles. The peripheral parts of retinular cells are enveloped by neuroglia cells and retinular cells are surrounded by 3 corneagenous cells. The distal portions of the 3 corneagenous cells contact each other, but the Y-shaped stemmata is separated from each other immediately under the cornea. The 7 axons from each stemma congregate into a bundle and each 7-axon group joins to form a stemmatal nerve, consisting of 42 retinular axons.