• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2001.09a
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• pp.15-18
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• 2001

Sixty natural springs and wells used as community facilities for drinking water are developed along mountain climbing way of suburban area and residential area in Daejeon City. In this study, the seasonal variation of their water quality and hydrochemical characteristics were investigated. Some natural springs are vulnerable to bacilli contamination because of their short residence time and shallow circulation in subsurface environment. The waters show hydrochemical types of Ca-HCO$_3$ and Na-HCO$_3$, and are characterized by low electrical conductance and weak acidic pH.

• International Commerce and Information Review
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• v.8 no.3
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• pp.369-381
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• 2006

This paper examined partnership and business performance of international joint venture. Based on the analysis of the sixty-three international joint venture cases, the following results were found. First, it was found that the partnership of commitment have a significant positive influences on the business performance of marketing and distribution sectors in international joint venture. Second, the partnership of complementarity have a significant positive influences on the business performance of marketing and distribution sectors in international joint venture. Third, the partnership of trust have a significant positive influences on the human resources efficiency of marketing sector in international joint venture.

• Proceedings of the Korean Geotechical Society Conference
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• 1993.10b
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• pp.51-76
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• 1993

More than sixty percentages of tunnels in the second phase of Seoul subway project have the ground coverages less than twenty meters. Majority of ground conditions encountered during turutel ling, therefore, are weathered rocks or weathered scils. Substantial lengths of tunnels are being constructed and designed running through the alluvial deposits as well. A comprehensive evaluation of current design and construction technology of Seoul subway tunnels is made with four categories such as site investigations, design concepts and methods, auxiliary measures and quality controls. Critical comments are given and some suggestions for the improvement of technology are presented.

• ALGAE
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• v.21 no.1
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• pp.61-73
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• 2006

Sixty taxa of Euglenaceae belonging to 19 species of Euglena, 1 species of Colacium, 8 species of Lepocinclis, 22 species of Phacus and 10 species of Trachelomonas were reported from different habitats of Orissa state in the east cost of India. All the taxa were recorded for the first time from this region.

• Biomolecules & Therapeutics
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• v.8 no.1
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• pp.1-12
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• 2000

Although the first pyridazine was obtained in 1886, this heterocycle was not thoroughly investigated such isomers as pyrimidine and pyrazine especially in the field of drug development because pyridazine derivatives do not occur as natural products. Recently medicinal chemists have an growing interest in the pyridazine derivatives, since many Pyridazine derivatives were found to possess various potential therapeutic activities. In this paper sixty-eight pyridazine derivatives, which are already introduced as medicines or are being developed as drugs were classified according to their pharmacological activities, reviewed since 1955 and the relationship of structure-activities was discussed.

• Archives of Pharmacal Research
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• v.2 no.2
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• pp.127-131
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• 1979

The extracts of sixty Korean plants were evaluated for their biological activities such as antitumor activities against Sarcoma 180, Leukemia SN-36 and Ehrlich ascites carcinoma, antimicrobial activities and behavioral observation in mice. The results are tabulate.

• Proceedings of the KACD Conference
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• 2001.11a
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• pp.575-575
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• 2001

The purpose of this study is to investigate the influence of flowable composite lining on microleakage at gingival dentin margin in Class II composite restoration. Sixty extracted human molars were prepared as box-only Class II form on the mesial and distal surfaces. The prepared cavities were randomly assigned to six groups.(omitted)

• Korean Journal of Pharmacognosy
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• v.16 no.3
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• pp.136-140
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• 1985

Sixty-eight kinds of aliphatic and aromatic substances peaks from ether extract of Codonopsis pilosulae Radix were shown by GC-Mass. Of them, 3 kinds of compounds were identified as ethyl benzene, acetophenone and 1-phenyl-2-butanone, which are compared with authentic specimen, and one compound was assumed as an aliphatic $C_8H_{16}O\;or\;C_9H_{20}$.

• Journal of Chest Surgery
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• v.16 no.2
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• pp.260-263
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• 1983

We studied and managed successfully a case of cervical dysphagia, 72 years old male patient. Cervical dysphagia is a relatively uncommon disease and encounters most commonly after the age of sixty in equal sex distribution. The final diagnosis can be made by esophagography and esophagomanometry. We performed cricopharyngeal myotomy of Belsey method with excellent result. After operation patient showed no more dysphagia, normal esophagogram and pressure drop in esophagomanometry.

• Archives of design research
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• v.20 no.2 s.70
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• pp.29-40
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• 2007

Human factors engineering has been taught in the design fields and considered as a necessary course for design students, We, ergonomists working with a design department, analyzed the current status of ergonomics curricula in the Korean design colleges. Sixty one percent of schools with design departments were offering ergonomics courses and most courses were electives. Comparatively more ergonomic courses were offered in industrial design and digital media departments. Ergonomic and human factors knowledge might not properly be acquired with this current status of the design curricula and systematic solutions should be considered and prepared for the future Korean designers.