• 한국정보디스플레이학회:학술대회논문집
• /
• 2003.07a
• /
• pp.1034-1037
• /
• 2003

In this work, Integral photography with variable focusing lens arrays is proposed. We fabricate two-dimensional liquid crystal lens arrays using cohesion of UV curable polymer and lithography. Applied voltage to the cell alters the effective refractive index of the liquid crystal layer and results in a change of the focal length. By adjusting the focal length, synchronized elemental image array for real or virtual mode is integrated in front of or behind the lens array.

• Journal of the Earthquake Engineering Society of Korea
• /
• v.18 no.5
• /
• pp.213-219
• /
• 2014

The source parameters of four earthquakes with magnitude larger than 4.0 nearby the offshore Sinan are analyzed. The waveform inversion method is used for analyzing the source parameters of two events (20 August 2012 and 21 April 2013) with C&B and AK135-c crustal velocity structure models. The source parameters of the other two events (26 July 1994 and 23 March 2003) are obtained from references. Focal mechanisms of the events are strike slip faulting or strike slip faulting with a thrust component. The directions of P-axes of the events are ENE-WSW or NE-SW which are similar to previous studies on P-axes in and around the Korean peninsula. With regard to the events nearby the offshore Sinan, the regional stress, rather than being local stress, is seen to be the result of the combination of tectonic forces from the compression of plates colliding to the Eurasian Plate.

• Journal of The Korean Astronomical Society
• /
• v.29 no.spc1
• /
• pp.397-398
• /
• 1996

Large field spectrographs are severely influenced by atmospheric refraction. LAMOST is a large field multi-object spectroscopy telescope with $5^{\circ}$ field of view, f/5 focus ratio and 20m focal length. There will be 4000 fibers simultaneous on it's $\phi$1.75m focal plane. Here we discuss the atmospheric refraction effects on LAMOST in two hands. One is the effect of differential refraction across the field, another is the effect of atmospheric dispersion. According to the calculation, we find that: 1. The largest deviation from center within the field is 4.;32" during a 1.5-hour integration at $80^{\circ}$ declination. 2. The directions of deviation are complex, so the deviations can't be decreased by rotating the field. We also give out the atmospheric dispersions.

• Language and Information
• /
• v.14 no.2
• /
• pp.47-70
• /
• 2010

This study investigates the semantic and prosodic properties of the so-called contrastive topic. We posit two informational primitives, namely, topical feature [+-T] and focal feature [+-F], from which four different informational categories, i.e., [+T, +F], [+T, -F], [-T, +F], and [-T, -F], are yielded. It is proposed that the informational category of contrastive topic has focal property [+F] as well as topical property [+T]. Based on the semantic approach that regards the function of [+F] as identificational predication and that of [+T] as forming a semantic conditional clause, it is shown that the semantic function of contrastive topic, which is specified as [+T, +F], is the combination of these two functions, i.e., identificational predication in a semantic conditional clause. This is supported by a scrutinized exploration of the prosodic pattern of English contrastive topic.

• Journal of Sensor Science and Technology
• /
• v.19 no.2
• /
• pp.130-136
• /
• 2010

The microbolometer array sensor with fine pitch pixel array has been implemented to the released amorphous silicon layer supported by two contact pads. For the design of focal plane mirror with geometrical flatness, the simple beam test structures were fabricated and characterized. As the beam length decreased, the effect of beam width on the bending was minimized, Mirror deformation of focal plane in a real pixel showed downward curvature by residual stress of a-Si and Ti layer. The mirror tilting was caused by the mis-align effect of contact pad and confirmed by FEA simulation results. The properties of bolometer have been measured as such that the NETD 145 mK, the TCR -2 %/K, and thermal time constant 1.99 ms.

• Proceedings of the Korean Society of Applied Pharmacology
• /
• 2000.04a
• /
• pp.15-16
• /
• 2000

Transient forebrain ischemia results in delayed neuronal death in the CA1 region of the hippocampus after injury, which is, at least in part, a consequence of excessive generation of reactive oxygen species. Previous in vitro studies using cell cultures or brain slices have demonstrated that phospholipase D (PLD) in the nervous system is involved in the signaling mechanism in response to a variety of agonists. Several recent studies have shown that reactive oxygen species stimulate phospholipase D (PLD) activity in several kinds of cells. Therefore, this raises the possibility that PLD activity is enhanced in the ischemic brain. Meanwhile, osteopontin (OPN) was initially identified as a sialoglycoprotein in bone, but has since been found in various tissues. Although not much is known about its function, OPN seems to play an important role in inflammation and tissue repair. Recently, it was reported that OPN was upregulated in the activated microglia after focal brain ischemia, suggesting that OPN might play a role in wound healing after a focal stroke.

• Journal of Chest Surgery
• /
• v.25 no.11
• /
• pp.1358-1361
• /
• 1992

During the past 4 years, 18 cases of deep vein thrombosis were treated. Diagnosis was based on clinical symptoms, phlebography and vascular Doppler examination. Etiologic factors were mainly trauma, operation and immobilization of the lower extremities. Seven patients were treated surgically and eleven patients medically. The indications for surgical thrombectomy included phlegmasia cerulea dolens [N=6], and phlemasia cerulea dolens with focal venous gangrene[N=1]. The comparative analysis of each treatment methods was done after a mean observation period of 6 months. Good clincal results were observation in 4 patents in surgically treated [57.1%], and 4 in conservative management group[36.3%]. There were no mortality in the both surgical and medically treated group but one patient with phlegmasia cerulea dolens and focal venous gangrene was dischared in moribund state at the third postoperation day due to sepsis and multiorgan failure. We believe that aggressive early surgical thrombectomy should be stronly considered for patients of phlegmasia cerulea dolena.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.31 no.3 s.258
• /
• pp.380-387
• /
• 2007

We carried out an image analysis of living cells forming their contacts at the bottom of the cell culturing substrate. In order to visualize the contact area selectively, we adopted total-internal-reflection-fluorescence (TIRF) method, which can illuminate the specimen volume within only several hundred nano-meters above the substrate. From the fluorescent intensity of the TRF image, we could calculate the distance of the cell surface from the substrate. As a result, we visualized the origin of cell contacts, their movements, and the change of cell-contact type from the close-contact into focal-contact with information of its vertical displacement representing the temporal evolution process of the three-dimensional cell-surface-profile near the contact area during this metamorphosis.

• The Korean Journal of Nuclear Medicine
• /
• v.19 no.2
• /
• pp.91-92
• /
• 1985

Hepatic Focal Nodular Hyperplasia(FNH)는 아주 드문 간 양성 질환으로 우연히 발견되는 수가 않다. FNH의 신티그램 소견은 다양하다. 즉 56%에서는 신티그램상 이상소견이 발견되지 않으며 17%에서는 냉소로 나타나고 나머지 7%에서는 열소로 나타난다. 저자들은 상복부 동통을 호소하는 25세된 여자 환자에서 간 신티그램상 이상소견을 발견할 수 없었던 FNH 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

• Asian-Australasian Journal of Animal Sciences
• /
• v.10 no.1
• /
• pp.114-117
• /
• 1997

A total of 77 Black Bengal goats (67 females and 10 males) of 3.5 to 5.0 years old between 18 and 20 kg liveweights were used in this study. The whole liver with gall-bladder from respective carcass was collected at slaughter following fecal and postmortem examinations. Tissue sections of all lobes of each liver were prepared and stained with hematoxylin and eosin following a standard procedure. Results confirmed the presence of flukes surrounded by fibrous capsule in the liver. All the animals were suffering from chronic Fasciola gigantica infections. The blood vessels in most of the liver tissue were thickened due to proliferation of fibrous tissue around them. Focal infiltration of lymphocytes in the lobules, patches of focal accumulation of neutrophils and eosinophils were found in all the liver tissue. Proliferations of new bile ductules in the hepatic trinity around the bile ducts that were clogged by the flukes were also observed in most tissue sections.