• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.4
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• pp.22-31
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• 2010

In this paper, a new split ring resonator using left-handed meta-material adapted in a bandpass filter with 2-stages is suggested. In this proposed bandpass filter, the size of the novel resonator can be easily controlled. Also, the bandwidth can be adjusted with the position of the tapped-line. The proposed resonator and filter has the center frequency of 10 GHz for I-band in military-satellite communication system with the Qe value of 184. The experimental results of the filter show that the insertion and return losses are 1.43 dB and 16.8 dB with bandwidth of 10 %, respectively.

• Journal of Chest Surgery
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• v.25 no.11
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• pp.1369-1375
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• 1992

During a 17-month period 32 consecutive patients underwent coronary artery bypass graft. The mean age of these patients was 45.3 years [range 39 to 71 years]. There were 18 men and 14 women. Preoperatively 11 patients had stable angina pectoris and 12 patients of unstable angina pectoris. 28% [9 patients] had of myocardial infarction history. The patterns of disease were single vessel involvement [4 casis], double vessel involvement [11 cases], triple vessel involvement [12 caese] and 5 cases of left main coronary artery disease. Thirty-seven percent [12/32] were in New York Heart Association class IV. Myocardial revascularization was performed under emergency conditions in 3 patients. We performed 13 case of double anastomosis, 12 case of triple anastomosis and 4 case of 4 anstomosis [mean 2.59 anastomosis per patient]. The left internal mammary artery was used in 68.7%. 90% of the patients receieved two or more grafts. Complications occurred in 8 patients [25%]. All patients were followed up for a mean of 8.6 months [2 to 17 months]. There was no hospital and late death. Postoperatively 87% were in New York Heart Association class I or II and 96% of the patient were free from angina.

• Journal of Species Research
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• v.9 no.4
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• pp.455-461
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• 2020

Marine benthic ciliates were collected from four rocky intertidal pools along the eastern and southern coasts of Korea from 2012-2013. Ciliate specimens were examined by observing living and stained cells. Four ciliate species were new to Korea based on morphological characteristics as follows. (1) Aspidisca polypoda (Dujardin, 1841): small bean-shaped (ca. 30 ㎛), eight conspicuous dorsal ridge, polystyla-arrangement of frontoventral cirri; (2) Epiclintes auricularis auricularis (Claparède & Lachmann, 1858): tripartite and auriform body (ca. 300 ㎛), 46 adoral membranelles, one or two frontal and 23 transverse cirri, 12 oblique fronto-midventral rows; 59 left and 71 right marginal cirri; (3) Pseudochilodonopsis marina Song, 1991: reniform body (ca. 50 ㎛), two obliquely positioned contractile vacuoles, seven left and five right kineties, five fragmented preoral kineties; (4) Dysteria semilunaris (Gourret and Roeser, 1888): oval-shaped (ca. 30 ㎛), two longitudinally positioned contractile vacuoles, conspicuous longitudinal grooves on both plates, four or five right kineties, one short row below frontoventral kineties.

• Journal of Korean Neurosurgical Society
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• v.41 no.3
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• pp.200-203
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• 2007

We describe a case that showed augmention of the superficial temporal artery [STA] pedicle's patency 15 months after extracranial to intracranial [EC-IC] bypass surgery for a carotid artery occlusion with contralateral intracranial internal carotid artery stenosis. It is rare that meager patency of the STA pedicle in the early postoperative angiogram can be become well augmented with time where most branches of the middle cerebral artery [MCA] are robustly filled with blood from the STA. A 28-year-old woman with a history of a previous left hemispheric stroke presented with slurred speech after several bouts of seizure. Magnetic resonance imaging showed a new infarct on the right hemisphere in addition to an old infarct on the left hemisphere. Carotid angiography revealed stenosis of the right carotid siphon and occlusion of the left carotid artery. The patient underwent EC-IC bypass on the right side. Even though the early postoperative angiogram showed meager filling of MCA with no significant stenotic lesion change, a subsequent angiogram taken 15 months later, demonstrated a widely patent STA pedicle with occlusion of the previous intracranial stenotic lesion. Selected cases with an inaccessible intracranial stenotic lesion can benefit from EC-IC bypass surgery; however, its clear indication should first be established.

• Journal of Korean Neurosurgical Society
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• v.51 no.3
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• pp.141-143
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• 2012

The authors describe a case of choriocarcinoma that metastasized to the cerebral cortex, vertebral body, and intramedullary spinal cord. A 21-year-old woman presented with sudden headache, vomiting and a visual field defect. Brain computed tomography and magnetic resonance examinations revealed an intracranial hemorrhage in the left temporo-parietal lobe and two enhancing nodules in the left temporal and right frontal lobe. After several days, the size of the hemorrhage increased, and a new hemorrhage was identified in the right frontal lobe. The hematoma and enhancing mass in the left temporo-parietal lobe were surgically removed. Choriocarcinoma was diagnosed after histological examination. At 6 days after the operation, her consciousness had worsened and she was in a state of stupor. The size of the hematoma in the right frontal lobe was enlarged. We performed an emergency operation to remove the hematoma and enhancing mass. Her mental status recovered slowly. Two months thereafter, she complained of paraplegia with sensory loss below the nipples. Whole spine magnetic resonance imaging revealed a well-enhancing mass in the thoracic intramedullary spinal cord and L2 vertebral body. Despite chemotherapy and radiotherapy, the patient died 13 months after the diagnosis.

• Journal of radiological science and technology
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• v.1 no.1
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• pp.69-73
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• 1978

This study was conducted in order to determine width, length of lung by radiographic method. The measurements carried out on normal chest X-ray film of 1,036 persons who took the radiograph from the April of 1977 to the June of 1978. As a result of this study, the following conclusions were obtained: 1. In the case of male, the average width, and length of both side lung size from new birth to nineteen of age was larger than female with the exception of partly age group. 2. Lung size in average width at adult was from 27.60cm to 29.20cm and female was 25.10cm to 26.22cm. 3. The mean length of left lung at adult was from 26.32cm to 25.27cm in female. 4. The average length of right lung at adult was from 25.8cm to 28.35cm in male and female was from 24.86cm to 25.17cm. 5. It was found that lung sige in width and length was slightly increased until 39 years of age, but was trend to decrease it of lung in the age of 40 years old. 6. In the case of adult, the difference of the average length between right and left lung, the length of right lung was slightly shorter than left that.

• ETRI Journal
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• v.34 no.1
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• pp.17-23
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• 2012

This paper analyzes the feasibility of a new 3DTV broadcasting service scenario via Advanced Television Systems Committee Mobile/Handheld (ATSC-M/H). We suggest a dual-channel system in which a left-view image is encoded by MPEG-2 with HD quality and a small-sized right-view image is encoded by AVC. Also, the left view is transmitted through ATSC main channel and the right view is transmitted through ATSC-M/H channel. Although the transport stream formats of two channels are different from each other, we demonstrate that it is possible for the ATSC 2.0 decoder to synchronize the display of the left and right views when both encoders use a common wall clock and time stamp. We also propose a program specific information descriptor which guarantees full compatibility with the conventional 2D HDTV and emerging mobile TV services. Finally, we provide the results of subjective visual quality assessment of the proposed system in support of its 3DTV service quality.

• Journal of Broadcast Engineering
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• v.13 no.5
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• pp.596-601
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• 2008

In this paper, we propose a new scheme to generate region-of-interest (ROI) enhanced depth maps in the hybrid camera system, which is composed of a low-resolution depth camera and a high-resolution stereoscopic camera. The proposed method creates an ROI depth map for the left image by carrying out a three-dimensional (3-D) warping operation onto the depth information obtained from the depth camera. Then, we generate a background depth map for the left image by applying a stereo matching algorithm onto the left and right images captured by the stereoscopic camera. Finally, we merge the ROI map with the background one to create the final depth map. The proposed method provides higher quality depth information on ROI than the previous methods.

• Journal of Biomedical Engineering Research
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• v.17 no.1
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• pp.109-120
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• 1996

Cardiac function is evaluated quantitatively using angiographic images via the analysis of the shape change or the heart wall boundaries. To kin with, boundary defection or ESLV(End Systolic Lert Ventricular) and EDLV(End Diastolic Left Ventricular) is essential for the quantitative analysis of cardiac function. The boundary detection methods proposed in the past were almost semi-automatic. Intervention by a knowledgeable human operator was still required Of con, manual tracing of the boundaries is currently used for subsequent analysis and diagnosis. This method would not cut excessive time, labor, and subjectivity associated with manual intervention by a human operator. EDLV images have noncontiguous and ambiguous edge signal on some boundary regions. In this paper, we propose a new method for automated detection of boundaries in noncontiguous and ambiguous EDLV images. The boundary detection scheme which based on a priori knowledge information is divided into two steps. The first step is to detect the candidate edge points of EDLV using ESLV boundaries. The second step is to correct detected boundaries of EDLV using the LV shape. We developed the algorithm of modifying EDLV boundaries defined adaptive modifier. We experimented the method proposed in this paper and compared our proposed method with the manual method in detecting boundaries of EDLV. In the areas within estimated boundaries of EDLV, the percentage of error was about 1.4%. We verified the useflilness and obtained the satisfying results througll the experiments of the proposed method.

• Archives of Craniofacial Surgery
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• v.15 no.2
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• pp.94-97
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• 2014

Unilateral nostril hypoplasia is an extremely rare congenital malformation of unknown etiology, and only a few cases have been reported in literature. Owing to variability and complexity of the deformity, surgical correction of unilateral nostril hypoplasia represents one of the most significant reconstructive challenges to reconstructive plastic surgeons. We report a 7-year-old Vietnamese child with nasal and periocular deformity resembling a craniofacial cleft. Grossly, the right nostril was patent but with alar rim deformity, and the left nostril was not readily identifiable. A dystopic medial canthus was present on the left side as well. Closer inspection and palpation of the left side of nose revealed a patency through the soft tissue and underlying bony structure, Thus, a new alar rim were reconstructed with an irregularly shaped Z-plasty to create patency on the involved side. Simulatneously, a second Z-plasty was performed to address the medial canthal deformity. Postoperative appearance and function was sastisfactory at one-year follow up visit. In the treatment of patients with nostril hypoplasia, a careful preoperative physical examination is a prerequisite, and Z-plasty can be a valuable option for surgical correction.