• Journal of the Korean Wood Science and Technology
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• v.38 no.1
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• pp.49-55
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• 2010

morphologically different Larix Kaemferi Carr sawdust. The pellet characteristics included moisture contents satisfied the first grade (less than 10%) of quality standard of wood pellets announced by Korea Forest Research Institute. Densities were also adequate for the first grade (640kg/$m^3$) on the quality standard and there was no large difference in other characteristics of pellets, however, pellets manufactured with planer shavings had the highest density. Ash contents also passed the first grade (less than 0.7) of quality standard. But bark pellet exceeded the second grade (1.5%) in ash content. Lower absorption ratio of bark pellet showed the effect on hygroscpicity. The heating value of the manufactured wood pellets in this study exceeded the first grade of quality standard(more than 4,300 kcal/kg).

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.35 no.3
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• pp.182-186
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• 2009

There are several oral lesions related with AIDS, such as candidiasis, hairy leukoplakia, Kaposi's sarcoma, aphthous stomatitis, lichen planus, and other opportunistic infectious diseases. Among the others, Kaposi's sarcoma, the most common malignant tumor associated with AIDS, is closely linked to the number of CD4+ T cell. Kaposi's sarcoma often occurs in palate, the most prone site, and has characteristic clinical features in most cases. Sometimes, the tumor induces underlying bone destruction at late stage. We report a case of a 27 year-old man with AIDS-associated Kaposi's sarcoma at left lower retromolar triangle, parapharyngeal area and discuss the management of AIDS patients in dentistry.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.23 no.2
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• pp.63-68
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• 2012

Objectives : The purpose of this study was to examine the association of exposures to heavy metals with positive diagnosis for attention-deficit hyperactivity disorder (ADHD) and Tourette's syndrome (TS). Methods : Study participants included 27 children diagnosed with ADHD ($9.9{\pm}2.9$ years of age), 21 diagnosed with Tourette's disorder ($10.7{\pm}2.2$ years of age), and 45 normal control children ($9.6{\pm}0.5$ years of age). A Perkin-Elmer mass spectrometer was used to measure the concentrations of 5 heavy metals (Pb, Cd, U, Be, Hg) in hair samples obtained from each participant. Each heavy metal concentration was compared among the groups by use of a Kruskal-Wallis test. Results : The levels of lead (p=.006) and cadmium (p=.037) observed in the hair of children diagnosed with ADHD were significantly higher than those found in the control subjects. There were no significant differences observed for heavy metal levels when comparing TS and control subjects. Conclusion : We confirmed that lead exposure is a risk factor for ADHD. We also identified that cadmium may be a new candidate risk factor for manifestation of ADHD. We did not find an association between heavy metals and manifestation of TS.

• Tuberculosis and Respiratory Diseases
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• v.47 no.4
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• pp.549-556
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• 1999

Benign pulmonary tumors are rare entities, and among them bronchial lipomas are the most uncommon. Up to date, about 80 cases have been reported in the English literature. But, the bronchial lipoma with extrabronchial growth causing middle lobe syndrome and pneumonia is extremely rare. Bronchial lipomas, mainly arising from normal fatty tissue of the proximal portion of the lobar or segmental bronchi, are histologically benign. But if diagnosis and treatments are delayed, they can produce extensive pulmonary parenchymal damage and irreversible brochiectasis distally. So whenever possible, the treatment of choice is resection by means of bronchoscopy via early diagnosis. But if endoscopic removal is not possible because the distal end of the tumor could not be visualized by fiberoptic bronchoscopy or if the nature of the tumor is unclear, surgery is necessary, with lobectomy or pneumonectomy being required in most cases due to the extensively damaged pulmonary parenchyma. We present a case of bronchial lipoma with extrabronchial growth, with a review of the literature and report of an unusual case.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.21 no.1
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• pp.31-36
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• 2010

Objective ： We investigated the characteristics of cellular phone use and its association with psychological problems among adolescents. Methods ： A total of 332 adolescent students were recruited for this study. The participants' self-reported characteristics of cellular phone use and the psychological problems caused by this were tested by using the Excessive Cellular Phone Use Survey (ECPUS), the Children's Depression Inventory (CDI), Spielberger's State-Trait Anxiety Inventory for Children (STAIC) and the Korea-Youth Self Report (K-YSR). Results ： The excessive user group made more use of text messages and they spent more time and paid higher fees than the comparison group. They expressed severer depression and anxiety and they had more behavior problems and lower school performance than the comparison group. The ECPUS score was positively correlated with score of the CDI, STAIC and the behavior problem scales of the K-YSR, and the ECPUS score was negatively correlated with the school performance scale of the K-YSR. Conclusion ： Our findings suggest that excessive cellular phone use by adolescents may be related to psychological problems. Careful education about the use of cellular phones and intervention are recommended for adolescents who excessively use cellular phones.

• Journal of Embryo Transfer
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• v.30 no.3
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• pp.257-260
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• 2015

Reproductive disorders in cows cause economic loss in livestock farms. Reproductive diseases, such as follicular cyst, luteal cyst, endometritis, pyometra, and repeat breeding cause infertility. Among these diseases, endometritis and pyometra are uterine infections that are leading causes of infertility. This study was performed to investigate the causative agents of uterine diseases using bacterial culture. Bacteria were obtained from the reproductive organs (vagina, uterine cervix, and uterine horn) of dairy cow diagnosed with endometritis or pyometra, and cultured on blood agar. The colonies obtained from cultivation for 24 hours were passaged. To identify the bacteria, the colonies grown in passaged culture Gram stained and applied to an automatic biochemical microbial identification system. Escherichia coli were commonly detected in vagina, uterine cervix, and uterine horn of dairy cows diagnosed to pyometra. The cows having endometritis showed not only Escherichia coli but also Pantoea spp. and Klebsiella spp. strains. Dairy cows that were infected with Escherichia coli in uterus caused mastitis or digestive disease. These results suggest that sanitary feeding and management beforehand are needed to prevent bacterial infections.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.6
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• pp.885-891
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• 2017

The energy storage system(ESS) is a core component for exchanging the power system structure of the unidirectional power flow into a bidirectional structure. Its important role has been increasing because it has multiple functions such as output stabilization of new renewable energy, demand management, frequency regulation, etc. However, the performance evaluation technology of ESS in korea is lower than one of advanced countries and the recognition of standardization is also lack compared to advanced countries. Furthermore, in order to more accurately and reliably validate the performance of the ESS in advanced countries, it has been required to perform not only performance testing by H/W devices but also performance verification by S/W tool. Therefore, in order to verify the performance testing of ESS by S/W tool, this paper proposes the modeling method of performance testing devices for MW scaled ESS by using the PSCAD/EMTDC S/W, based on real testing devices in domestic institute. From the simulation results of proposed modeling method, it is confirmed that the proposed modeling method is a useful tool for performance validation of ESS.

• Journal of the Korean Society of Food Culture
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• v.24 no.2
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• pp.155-163
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• 2009

This study was conducted to examine the superior factors and the perception of Korean traditional foods by college students studying in food related industries. The subject group consisted of 65.0% of the students majoring in food service & culinary arts, 12.9% of the students majoring in food & nutrition, and 7.3% of the students majoring in baking & pastry. The nutritional value was evaluated as the top superior factor of Korean traditional foods by the study subjects. In addition, 92.4% of reported that they had eaten Korean traditional foods in the past, 76.8% of whom responded that the reason for having Korean traditional foods was its time-honored tradition. 'Cooking for oneself' was considered to be the most popular way (78.2%) of obtaining Korean traditional foods, while the traditional market (58.6%) was the most popular place to purchase the foods. 'Not having enough time' (47.2%) was the primary reason for not having Korean traditional foods, although 72.9% of the subjects reported that they wanted to learn about Korean foods. 'Standardization of taste, nutritional value, and recipes' was found to be the most important factor (41.3%) required to increase the consumption of Korean traditional foods. Additionally, 56.1% of the subjects responded that they feel there is a need for modernization of the cuisine to meet the taste of the general public. However, 61.4% of the subjects responded that the succession of traditional dietary culture was the primary reason for developing traditional cuisine, which indicates that there is a bright future for Korean traditional foods.

• Korean Journal of Optics and Photonics
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• v.24 no.4
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• pp.176-183
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• 2013

In this paper, we report the design, fabrication and characterization of the 3-Dimensional optical receiver for a Laser Detection And Ranging (LADAR) system. The optical receiver is composed of three parts; $16{\pm}16$ Geiger Mode InGaAs Avalanche Photodiode (APD) array device operated at 1560 nm wavelength, Read Out Integrated Circuit (ROIC) measuring the Time-Of-Flight (TOF) of the return signal reflected from target objects, a package and cooler maintaining the proper operational condition of the detector and control electronics. We can confirm that the LADAR system can detect the signal from a target up to 1.2 km away, and it showed low Dark Count Rate (DCR) of less than 140 kHz, and higher than 28%-Photon Detection Efficiency (PDE). This is considered to be the best performance of the $16{\pm}16$ FPA APD optical receiver for a LADAR system.

• International Journal of Heart Failure
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• v.6 no.2
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• pp.70-75
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• 2024

With advancements in both pharmacologic and non-pharmacologic treatments, significant changes have occurred in heart failure (HF) management. The previous Korean HF registries, namely the Korea Heart Failure Registry (KorHF-registry) and Korean Acute Heart Failure Registry (KorAHF-registry), no longer accurately reflect contemporary acute heart failure (AHF) patients. Our objective is to assess contemporary AHF patients through a nationwide registry encompassing various aspects, such as clinical characteristics, management approaches, hospital course, and long-term outcomes of individuals hospitalized for AHF in Korea. This prospective observational multicenter cohort study (KorHF III) is organized by the Korean Society of Heart Failure. We aim to prospectively enroll 7,000 or more patients hospitalized for AHF at 47 tertiary hospitals in Korea starting from March 2018. Eligible patients exhibit signs and symptoms of HF and demonstrate either lung congestion or objective evidence of structural or functional cardiac abnormalities in echocardiography, or isolated right-sided HF. Patients will be followed up for up to 5 years after enrollment in the registry to evaluate long-term clinical outcomes. KorHF III represents the nationwide AHF registry that will elucidate the clinical characteristics, management strategies, and outcomes of contemporary AHF patients in Korea.