• IE interfaces
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• v.23 no.2
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• pp.176-181
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• 2010

Warranty claim data analysis is a useful tool for the manufacturer because it contains many useful informations regarding reliability of the product in the real-world environments. Because of the nature of uncertainty and the incompleteness of data, some bias patterns are observed on warranty claim rate known as 'spikes'. Two types of spikes are considered. One is due to manufacturing-related failures. The other is caused by customer's behavior. This paper proposes a model by considering two types of spikes. Warranty claim data is analyzed with the proposed model. To represent spikes observed on the early warranty period, we classify failures into manufacturing-related failures and usage-related failures. Uniform distribution is assumed for the time delayed to diagnose and report by customers. By reducing maximum value of the delayed time by customers, the proposed model characterizes customer's rush in the vicinity of the warranty expiration limit. Experimental results by using the real warranty claim data show that the proposed model is better than the existing one in respect to MSE(Mean Squared Error). Moreover it is expected to estimate the failure rate more realistically with proposed model because it considers the delayed time to diagnose and report by customers.

• Journal of Ocean Engineering and Technology
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• v.18 no.4 s.59
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• pp.71-76
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• 2004

A Study of the traditional Korean fishing boat is based on a report on an investigation of the Korean fishing boats, conducted in 1921. The report was completed in 1927 with the conclusion of the Southern Sea region and West Sea region studies, which included the investigation oj the entire region. It was a very thorough and scientific investigation of Korean fishing boats, which has been published in three volumes. Based on this report, this paper surveys the characteristics and the hull form of the traditional Korean fishing boats. As a result, we find ${\cdot}out$ that the hull form of the traditional Korean fishing boat is very similar to that of modern sailing boat. Thus, it is a good candidate for the development of the modern sailing boats for the Korean Sea.

• The Journal of Korean Obstetrics and Gynecology
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• v.34 no.1
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• pp.82-92
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• 2021

Objectives: The purpose of this study is to report the clinical effectiveness of Korean medicine treatment on interstitial cystitis. Methods: The patient diagnosed with Interstitial cystitis/Bladder pain syndrome (IC/BPS) was treated with Korean medicine treatment during 22 days of hospitalization. The patient received Korean medicine treatment including herbal medicine, acupuncture, pharmacopuncture, moxibustion, cupping and extracorporeal magnetic stimulation therapy. The effect of treatment on IC/BPS was evaluated through the Numeric Rating Scale (NRS), voiding diary, and Interstitial Cystitis Symptom Index/Problem Index (ICSI/ICPI). Results: After the treatment, the clinical symptoms of IC/BPS such as pelvic pain, pelvic pressure, frequent urination and urinary urgency were improved. Also, the patient had better scores in ICSI/ICPI. Conclusions: This case report proved that the Korean medicine treatment may be effective for improving clinical symptoms of IC/BPS. However, a large-scale clinical study is needed in the future to prove the effectiveness of Korean medicine treatment for IC/BPS.

• The Journal of Korean Obstetrics and Gynecology
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• v.36 no.1
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• pp.90-102
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• 2023

Objectives: The purpose of this study is to report the clinical effectiveness of Korean medicine treatment on postmenopausal syndrome. Methods: The patient with postmenopausal syndrome with palpitation was treated with Korean medicine treatment during 14 days of hospitalization. The patient received Korean medicine treatment including herbal medicine, acupuncture and moxibustion. The effect of treatment on postmenopausal syndrome was evaluated through the Numeric Rating Scale (NRS) and questionnaire. Palpitation and arrhythmia was evaluated by Electrocardiogram (ECG) and manual pulse diagnosis three times a day. Result: After the treatment, the clinical postmenopausal symptoms of palpitation and hot flush were improved. Also, ECG's result was improved ventricular premature contraction to normal ECG. Conclusions: This case report proved that the Korean medicine treatment may be effective for improving postmenopausal syndrome with palpitation and hot flush. However, further clinical study is needed in the future to prove the effectiveness of Korean medicine treatment for postmenopausal syndrome with palpitation and hot flush.

• Korean Journal of Soil Science and Fertilizer
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• v.46 no.5
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• pp.303-307
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• 2013

Research reports on soil during the years from 1906 to 2012 have been analyzed to understand the role and pattern of soil research in agriculture. The number of research reports in relation with the key word of soils were 2,211 cases and classified in accordance with the criteria of research area, research subject, and research place of report papers. During the 40 years from 1906 to 1946, research work on soil chemistry was reached 62%, highest in the research area. In the case of research subject, research reports on soil fertility and soil nutrients was highest as 42.2%, and the next subject on soil salt and desalinization was about 19.5%. Research places were in the order of paddy as 34.1%, upland as 23.7%, and reclaimed soil as 22.5%. From 1953 to 2012 during 60 years, in the research area report papers were mainly concentrated on chemistry area as 32% and the next was physics as 26%, and environment as 12%. In the case of research subject during the same period, nutrient management report was reached 21.1%, and soil improvement on chemical and physical properties for optimum crop growth was 11.9%. Soil survey and data base establishment report was 8.6%. Research place were in the order of upland as 34.9%, paddy as 25.7%, and vinyl house as 12.5%, which showed reversed pattern compared to that of before 40 years.

• Journal of Chest Surgery
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• v.52 no.4
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• pp.243-246
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• 2019

Extraskeletal osteosarcoma (ESOS) is a malignant soft tissue neoplasm producing osteoid, without any continuity with the bone or periosteum. Primary ESOS presenting in the mediastinum is an extremely rare, yet aggressive malignant tumor associated with a poor prognosis. We report a case of primary ESOS arising from the thymus in a 63-year-old male patient.

• Korea Journal of Hospital Management
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• v.6 no.2
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• pp.3-21
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• 2001

Although the accounting system is a very useful information system for manager, that of the National University Hospitals is not settled until now. Specially, when it will adapt the responsibility management system itself, it will more important tools for them. The purpose of this research is to make the standard accounting system for National University Hospital. It was surveyed the 7 National University Hospital's accounting system, and compared to that of Private University Hospital. The results are fellows; First, it must be match financial report with budgeting system. By comparing to each other, it can make to evaluate the performance of hospital. Second, it must make same format and contents in financial report among 7 hospitals. Specially, the cost information is needed to be made more details. This research suggest the new direction to make the basic information form. It was confirmed with financial manager in private university hospital. We hope it will contribute to make the new accounting system for National University Hospital.

• Journal of Species Research
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• v.10 no.3
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• pp.191-200
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• 2021

To study the biodiversity of bacterial species, here we report indigenous prokaryotic species of Korea. A total of 23 bacterial strains affiliated to the class Alphaproteobacteria were isolated from various environmental sources including seaweeds, seawater, fresh water, wetland/marsh, tidal sediment, plant roots, sewage and soil. Considering higher than 98.8% 16S rRNA gene sequence similarities and formation of a well-defined phylogenetic clade with named species, it was confirmed that each strain belonged to the predefined bacterial species of the class Alphaproteobacteria. There is no official report of these 23 species in Korea; 20 species of 16 genera (Mameliella, Yangia, Paracoccus, Ruegeria, Loktanella, Phaeobacter, Dinoroseobacter, Tropicimonas, Lutimaribacter, Litoreibacter, Sulfitobacter, Roseivivax, Labrenzia, Hyphomonas, Maricaulis, Thalassospira) in the order Rhodobacterales and 3 species of a single genus (Brevundimonas) in the order Caulobacterales. Gram-staining, cell morphology, basic biochemical characteristics, isolation sources, optimum temperature, growth media, and strain IDs are detailed in the species description as well as Table 1.

• Journal of Chest Surgery
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• v.57 no.1
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• pp.92-95
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• 2024

Complete resection of an apicoposterior mediastinal mass is essential due to the mass effect, which exerts pressure on adjacent organs. Recently, the use of minimally invasive surgery has had many advantages. In this report, we describe a case in which a large apicoposterior mediastinal hypervascular mass was managed using a purse-string suture technique during robotic-assisted thoracoscopic surgery (RATS). The patient, a 77-year-old woman, was diagnosed with a 6.2-cm apicoposterior mediastinal hypervascular solid mass originating from the branches of the right subclavian artery. The patient underwent RATS for treatment. To obtain an adequate view of the apex of the thoracic cavity, a needle aspiration was performed, followed by the application of a purse-string suture technique. This was done to reduce the size of the tumor and to prevent catastrophic events such as seeding or spillage of the cystic mass. The mass was histopathologically diagnosed as a schwannoma. The patient was discharged on the first postoperative day without experiencing any complications.

• Journal of Chest Surgery
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• v.44 no.3
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• pp.269-271
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• 2011

Pilomatrix carcinoma originates in the matrix cell and is marked by exophytic growing and common local recurrence. There is no established treatment for wide local invasion and metastasis of the pilomatrix besides wide surgical resection. We report a case of rapidly progressive pilomatrix carcinoma, which arose around an Eloesser open window with direct invasion to the adjacent tissue.