• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.856-857
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• 2007

For the sake of a stable power supply, an electric power company must have power generation facilities that can generate more electricity than the maximum demand of the year. Due to the fact that the maximum electricity demand will also continue to increase, enormous investments are needed annually to build power plants. For that reason, electric power companies are propelling 'Demand Side Management' which improve the form of electrical usage for the customer in a positive way. This paper presents the concept of 'Cool Storage System' which is the most representative program, which lowers the peak demand during the on-peak time periods in a day and creates a base load simultaneously during the night time hours among the DSM programs.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1163-1164
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• 2007

At present, one of the big characteristics in electric power market in korea is unique seller but in the near future competitions are expected in the market. so additional service for the electric power are expected. Also with development of IT technology, remote inspection for power usage are possible so as consumption pattern analysis. KORAIL is one of the biggest consumer in electric power market so it is necessary to investigate power consumption pattern. This paper presents electric power rate definition program based on billing system database and also basic power rate optimization method. Base on the substation annual power usage DB data, the characteristic of the substation power consumption are investigated and effective electrical billing system are compared each other. Through this program it is verified that we can save more then several hundred million won for a year.

• Journal of Chest Surgery
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• v.28 no.7
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• pp.713-716
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• 1995

A 75-year-old man was admitted to the hospital because of a pericardial effusion.After 3 L of blood-stained pericardial fluid was drained, clinical examination together with echocardiography and chest computed tomography showed a tumor in the right atrium. At operation a pedunculated vascular tumor was found with a broad base which was embedded in the atrial wall and extended into the pericardium.A wide resection was performed resulting in a large defect of the right atrial wall. The defect was reconstructed with a pericardial patch. The patient did well postoperatively, but bloody pleural effusion developed later, presumably because of pulmonary metastasis. The patient died 2 months after surgery as a result of respiratory failure.

• Journal of Chest Surgery
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• v.37 no.5
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• pp.452-455
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• 2004

We report a case of a 40-year-old woman whose right ventricular out-flow tract was moderately obstructed by a heavily calcified pericardial ring. It was passing over the base of pulmonary artery and mid-portion of left ventricle but the other parts of the pericardium was mildly fibrotic. The pericardium and calcified ring were completely removed under cardiopulmonary bypass. The patient was recovered uneventfully and we could not find the specific cause of calcified pericardial ring.

• Journal of Korean Neurosurgical Society
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• v.39 no.6
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• pp.459-463
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• 2006

This report describes a case of diffuse neurofibroma[DNF] that presented with spontaneous intratumoral hemorrhage. A 31-year-old man with cutaneous manifestations typical of neurofibromatosis type 1[NF1] was referred to hospital with a progressively expanding scalp swelling. Magnetic resonance imaging[MRI] showed an acute hematoma surrounded by a dense mass on the parietooccipital scalp. Plain skull radiographs and a computed tomography[CT] scan revealed bony defects in the occipital bone around the lambdoid suture and the skull base, including the sphenoid and petrous bones. The tumor extended to the upper cervical region and infiltrated through the fascia of the musculature. The tumor and adjacent soft tissue were highly vascular, which made surgical resection difficult. We describe the clinical, radiological and pathological features of this patient md discuss the surgical methods used to avoid a life-threatening hemorrhage during surgery.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2006.06b
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• pp.505-508
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• 2006

Talc has been used as coating pigments for gravure printing paper and light weight coated paper (LWC) in Europe for 30 years and the use of talc has been significantly increased every year. Currently, talc is used for about 15% of pigments for paper coating. Especially more than 50% of the coating pigments for gravure printing paper and web printing paper (web off-set) is applying talc. The use of talc improves printability, smoothness, and the coverage of base paper, and showed a significant effect on reducing the coated paper basis weight. In addition, it improves compressibility of the coating layer, influencing the gravure printability.

• Korean Journal of Plant Taxonomy
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• v.39 no.2
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• pp.74-79
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• 2009

The morphological characteristics of leaves, trichomes, and acorns in 8- to 11-year-old reciprocal hybrids of Quercus dentata and Q. serrata were investigated. The reciprocal hybrids had obovate to obovateelliptic leaves that were smaller than those of Q. dentata but similar to Q. serrata in their leaf size, obtuse leaf apex, narrow-tipped leaf base, and shape of small to intermediate-sized serrations. The ray length of stellate hairs was intermediate between those of the parents, and the hairs showed dense growth. Long single hairs are present among the stellate hairs on the abaxial side of the leaves. Therefore, the hybrids of Q. dentata and Q. serrata could be identified by the size and shape of leaves, shape of serrations, and type of leaf trichomes.

• Journal of Veterinary Clinics
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• v.35 no.6
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• pp.286-289
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• 2018

A 4-year-old castrated male Maltese was referred to our hospital with heart murmur. The client did not recognize any symptoms. Auscultation revealed systolic murmur located at the left heart base. Radiographs showed right-sided cardiomegaly with the main pulmonary artery bulging and enlargement of pulmonary vessels. Echocardiogram revealed a small ventricular septal defect and a large atrial septal defect. There was also a common atrioventricular valve. Based on diagnostic imaging studies, the dog was diagnosed with transitional atrioventricular septal defect.

• International Journal of Industrial Entomology and Biomaterials
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• v.43 no.2
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• pp.99-103
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• 2021

In the present study, twelve bivoltine silkworm races were evaluated for its performance based on quantitative and qualitative traits. Seven oval and five peanut cocoon shaped races were reared in different seasons of the year. By using evaluation index method, the results showed that six races were identified as potential parental races. Among oval races, 75xin, KoC, KoZ and among peanut races An 902, 7532 and QD7 were selected as base material. The identified high yielding races will be used in various breeding programs as initial parents for the production of superior bivoltine breeds/hybrids in Vietnam

• Journal of Korean Port Research
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• v.5 no.2
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• pp.3-10
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• 1991

Although Korea has had a proud maritime history of thousands of years marked by outstanding leaders such as Chang Bogo and Yi Soon-shin there has not been a unified 'Ocean Day' like the one in Japan. Extensive historical survey revealed eight candidate days for ocean day designation. Historical significance, seasonal consideration and other factors were examined with respect to each candidate date. Of the eight events the establishment of Chunghaejin maritime base on the island of Wando on the southern coast of Korea by Admiral Changbogo in the lunar month of April in the year of 828 is judged to have the greatest desirability Institution of 'Ocean Day' is recommended with the date to celebrate as May 20(a convenient date of May as translated into solar month). A weeklong celebration throughout the country is also recommended with colorful events to be had over the Ocean Week following the Ocean Day.