• KOREAN JOURNAL OF CROP SCIENCE
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• v.27 no.3
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• pp.238-242
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• 1982

The growth of spike, internode and leaf sheath in winter wheat(Tritican vulgale Vill.) was investigated by measuring them 10 times from April 15 to May 30, with 5 days intervals, in 1980. The variety used was Glumil(Suweon #215) which was newly developed at Wheat and Barley Research Institute in Suweon, Korea. During the periods investigated, the spike elongated from 0.6cm to 8.3cm. The spike began to elongate rapidly from 20 days before heading (April 25) and finished nearly off the elongation at 5 days before heading (May 10). The length of the spike showed highly significant correlation with that of 3rd internode ($r=0.974^{***}$), and. with that of first leaf sheath($r=0.954^{***}$) from the top of wheat plant. Correlation between the length of the 3rd internode and that of the first leaf sheath was also very high($r=0.995^{***}$). A major elongation of the spike occurred concurrently with the elongation of the third internode and with that of the first leaf sheath.

• Korean Journal of Environmental Agriculture
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• v.4 no.2
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• pp.95-101
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• 1985

Water samples collected monthly between November 1982 and October 1983 from seven reserviors and a river in the periphery of Suwon, Korea were subjected to gas chromatographic analysis for PCBs and organochlorine insecticide residues. PCBs were positively detected in the most samples. The average residue levels of PCBs were found in the range of 0.009${\sim}$0.5 ppb while those of organochlorine insecticides were in the range of "not detected"${\sim}$0.008 ppb. The ratio of average residue levels of PCBs to those of total DDT was found to vary with sampling sites. The highest ratio of 500 was found in the water samples of Han River and the lowest in water of Won-chun Reservior. Both industrial and urban waste appear to be responsible for PCBs in the irrigation waters.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.20 no.3
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• pp.230-236
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• 1987

The correlation between tintinnid and dinoflagellate by means of seasonal variation of standing crops was investigated at two selected stations in Masan Bay, well-known as a red tide zone in southern coastal waters of Korea, during the period from January 1981 to December 1982. The most dominant dinoflagellates mainly belonged to $20-60\;{\mu}m$ of size class, and Gymnodinium and Prorocentrum were predominant from spring to summer season. Of tintinnid, Favella spp. were most dominant and associated with dinoflagellate blooms at the same season. Especially, Favella spp. were most positively correlated with $40-60\;{\mu}m$ size class of dinoflagellate, and also represented higher multiple corrleation with outer station (St.2), comprising relatively large species of Gymonodinium and Protogonyaulax, than with inner station (St. 1), dominated by Prorocentrum blooms. Thus, the interspecific food selection by size and morphology between tintinnid including Favella and dinoflagellate is recognized and it is considered to be an important factor influenecing on the prey-predator relationship in lower trophic level in the surveyed area.

• The Korean Journal of Mycology
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• v.13 no.1
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• pp.27-40
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• 1985

Two-hundred fifty specimens of Discomycetes were collected, for the most part, at Gwangneung, Mt. Deokyu, Mt. Seulak, Mt. Sungsu, Mt. Paldal, from March, 1982 to July, 1984. These Discomycetes were identified and classified into 2 orders, 9 families, 18 genera and 23 species. Among them, Helvella pezizoides Afz. ex Fr., Peziza celtica (Boud.) Moser, Humaria hemisphaerica (Wiggers ex Fr.) Fuckel, Trichophaea gregaria (Rehm) Boud., Trichoglossum walteri(Berk.) Durand, Spathularia flavida Pers. ex Fr., Arachnopeziza aurelia (Pers. ex Fr.) Fuckel, Rutstroemia americana (Durand) White, Rutstroemia macrospora (Peck) Kanouse apud Wehmeyer forma gigaspora Korf, Ascocoryne cylichnium (Tul.) Korf, Bisporella citrina (Batsch. ex Fr.) Korf et Carpenter, Chlorosplenium chlora (Schw. ex Fr.) Curtis, Chlorociboria aeruginascens (Nyl.) Kanouse ex Ramamurthi, Korf et Batra subsp. aeruginascens, Hymenoscyphus scutula (Pers. ex Fr.) Phillips, Cyathicula cyathoidea (Bull. ex Fr.) de Thumen were new records in Korea. These species are described and their Korean names are designated.

• The Korean Journal of Financial Management
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• v.15 no.1
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• pp.1-30
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• 1998

본(本) 연구(硏究)는 한국증권시장에서 대표적 대용시장(代用市場)포트폴리오인 한국종합주가지수(韓國綜合株價指數)와 동일가중지수(同一加重指數)의 효율성에 대한 검증을 Hansen(1982)의 다변량의 GMM에 의하여 실시하고자 하였다. 이를 위하여 먼저, 주식수익률자료(株式收益率資料)에 근거한 산업별(産業別)포트폴리오수익률과 초과시장수익률모형(超過市場收益率模型)의 오차항(誤差項)이 정규분포(正規分布)를 벗어남을 증명함으로써 GMM검증방법(檢證方法)의 정당성을 찾고자 하였다. 정규분포에 대한 검증방법(檢證方法)으로서 왜도와 첨도의 검증과 이를 결합한 Jarque-Bera(1980)검증(檢證)을 실시하였다. 둘째로, Hansen(1982)의 GMM을 대용시장(代用市場)포트폴리오의 효율성(效率性) 검증(檢證)에 적용하는 방법에 대한 연구들인 Mackinlay-Richardson(1991), Harvey-Zhou(1993)와 Campbell-Lo-Mackilay(1997) 등을 기초로하여 이들의 방법론을 개선한 3가지의 효율성(效率性) 검증방법(檢證方法)을 제시하였다. 셋째로, 이상의 검증방법(檢證方法)들을 토대로 1980년 1월부터 1997년 6월까지 월별주식수익률(月別株式收益率)의 자료(資料)를 11업종으로 분류하여 산업별(産業別)포트폴리오수익률(收益率)과 초과시장수익률모형(超過市場收益率模型)에 의한 오차항(誤差項)이 정규분포(正規分布)를 따르는지와 아울러 대용시장(代用市場)포트폴리오의 효율성을 검증하였다. 검증결과(檢證結果), 산업별(産業別)포트폴리오수익률과 오차항(誤差項)은 대부분 정규성이 기각(棄却)되어 GMM검증방법(檢證方法)의 정당성이 입증되었다. 따라서 GMM에 의한 효율성(效率性)을 검증한 결과, 한국종합주가지수(韓國綜合株價指數)의 경우에는 평균-분산(平均-分散)프론티어(mean-variance frontier)상(上)에서의 대용시장(代用市場)포트폴리오의 효율성(效率性)은 기각(棄却) 할 수 없는 것으로 나타났으나 평균수익률(平均收益率)이 GMVP의 수익률보다 낮았기 때문에 효율적(效率的) 프론티어(efficient frontier)상(上)의 대용시장(代用市場)포트폴리오의 효율성(效率性)은 기각(棄却)되어 대용시장지수로서의 문제점이 있는 것으로 나타났다. 그러나 동일가중지수(同一加重指數)는 평균수익률이 GMVP의 수익률보다 높을 뿐만아니라 효율적(效率的) 프론티어상(上)의 대용시장(代用市場)포트폴리오의 효율성(效率性)도 채택되어 한국종합주가지수(韓國綜合株價指數)보다 우월한 지수(指數)인 것으로 나타났다.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1982.05a
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• pp.14.1-14
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• 1982

The Clinicostatical and Bacteriological studies on the otofuruncles were carried out on 297 pts who had visited OPD of ENT depart of St. Benedict Hospital during the 2 years from Jan. 1980, Until Dee, 1981. The results obtained were as follows; 1) The otofuruncle ratio to the whole ENT visiting cases was 27,149:991. (3.6%) 2) The age distribution showed the highest incidence in 0-10 years. (63%) 3) The ratio, male vs female was 180:133 (1.3:1). 4) The seasonal incidence showed the highest incidence in July and August. 5) The side of otofuruncle was left side (56.7%). 6) The site of otofuruncle was posterior (21%), anterior (19%), multiple (13%). 7) Average duration of illness on first visiting was 4.7 days. 8) The numbers of cases who performed I&D was 103 pts. (35%). 9) The most common causative organism was Staph. aureus (88%). 10) Average duration of treatment was 5.3 days.

• Korean Journal of Weed Science
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• v.3 no.2
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• pp.129-136
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• 1983

To study ecological characteristics of Sagitiaria pygmaea and Sagittaria trifolia occurring in Korea their propagules were collected from 3 locations (Sagittaria pygmaea: Chuncheon, Suweon, Milyang; Sagittaria trifolia: Suweon, Iri, Jeonju) in 1981, cultured and replanted 4 times (May 20, June 5, June 20, July 5) in 1982. Sagitraria pygmaea from Suweon flowered earlier than those from Chuncheon and Milyang in the plants planted on May 20, but this was reversed in another planting dates. Three storied inflorescence was observed newly in Sagittaria pygmaea. Sagittaria pygmaea from Iri and Jeonju had more number of tillers, but less number of tubers per tiller than those from Suweon. Sagittaria rrifolia from Chuncheon flowered earlier than those from Suweon and Milyang. Sagirtaria trifolia from Milyang was narrower in the upper leaf width and less in the number of tubers per plant than those from Chuncheon and Suweon. Each of local collections may be regarded as different ecotype based on the above differences.

• Korean Journal of Weed Science
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• v.3 no.1
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• pp.23-28
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• 1983

To study ecological characteristics of Eleocharis kuroguwai occuring in Korea its propagules were collected from 6 locations from the northern part to the southern part of Korea (Chuncheon, Suweon, Iri, Jeonju, Gwangiu and Milyang) in 1981, cultured and replanted 3 times (May 20, June 5, June 20) in 1982. They flowered from August 5 to August 27 when they were planted on May 20, and from August 20 to August 27 when they were planted on Tune 20. Plant height, number of tillers and top fresh weight/$m^2$ were 50-90cm, 500-875, and 175-750g, respectively when they were planted on May 20, and 40-70cm, 250-625, 325-625g, respectively when they were planted on June 20. Number of tubers per plant were 0.98-1.98 when they were planted on May 20, and 1.81-2.87 when they were planted on June 20. Eleocharis kuroguwai from Chuncheon or Suweon was more open in plant type, shorter in plant height, narrower in diameter of pedicel and shorter in inflorescence than those from Iri, Jeonju or Gwangju. Each of the local collections may be regarded as different ecotype, based on the above differences in morphology and responses in growth and flowering to the planting dates. The results appear to imply that Eleocharis kuroguwai weeds occurring in various locations of Korea are different one another in competitive avility with rice crop.

• Journal of Preventive Medicine and Public Health
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• v.17 no.1
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• pp.57-63
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• 1984

To assess the hearing conservation by the hearing protection devices in the field, 1,237 healthy female weavers of 16 to 24 year old were surveyed from April 1982 to January 1983. By reviewing the charts, their working durations, hearing threshold shift levels and whether wearing the ear plugs or not were checked. The hearing threshold levels were measured at 4,000Hz by audiometry AA-30A, RION Japan. They were divided into two groups: an experimental group with ear plug and the control group without it. The threshold shift level above 40dB in controls was 44.6% in left and 40.9% in right ear and that in experimental group 8.0% in left and 6.6% in right ear. The distribution of threshold shift levels between control and experimental group was significantly different in both ears, but that between left and right ear not significantly different in both groups. The longer the working durations were, the more the proportion of high threshold shift levels was and the larger the differences in the proportion of above 40dB between both groups were.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1982.05a
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• pp.12-12
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• 1982

We have recently experienced a case of decannulation difficulty resulted from head and thoracic injury. The patient was 21-year-old male who undergone craniectomy and tracheotomy at other hospital about 7 months ago prior to admission On admission, there was swelling in glottic and subglottic region in indirect laryngoscopy and bronchoscopy with fixation of vocal cords in paramedian position. We tried to reestablish an adequate air way with bougination using Jackson esophageal bougie but there was no effect with it. So we performed vertical incision through cricoid cartilage and tracheal rings and insertion of Teflon tube in stenotic lesion for 9 months and removed it. At present time, the patient has been satisfactory corking training course.