THE NUMBER OF POINTS ON ELLIPTIC CURVES [수식] : y2 = x3 + a3 OVER Fp MOD 24

유순호,박화신,HYUN KIM 호남수학회 2009 호남수학학술지 Vol.31 No.3

In this paper, we calculate the number of points on elliptic curves [수식] : y2 = x3+a3 over Fp mod 24 and Eb 0 : y2 = x3+b over Fp mod 6, where b is cubic non-residue in F*p. For example, if [수식] (mod 12) is a prime, and a and a(2t - 3) are quadratic residues modulo p with [수식] (mod p), then the number of points in [수식] : y2 = x3 + a3 is congruent to 0 modulo 24.

[특집 : 제주도의 육상 및 해양자원] 제주도의 토양과 농업자원 : 제주도 토양의 분류와 특성 및 관리 문제

유순호,송관철 제주학회 1991 濟州島硏究 Vol.8 No.-

악하강에 발생한 다발성 설하신경 신경초종 1예

유순호,이은정,양윤수,홍기환 대한이비인후과학회 2009 대한이비인후과학회지 두경부외과학 Vol.52 No.8

Neurilemmoma is a benign tumor which is known to originate from the myelin-producing Schwann cells of the spinal nerve root, peripheral nerve and all kinds of cranial nerves except the optic nerve and olfactory nerve. Approximately, 25% to 40% of all neurilemmomas are found in the neural structures of the head and neck. Neurilemmoma of the 12th cranial nerve is rare; multiple neurilemmoma is even more rare. Recently, the authors experienced a case of multiple (×3) hypoglossal neurilemmoma in the submandibular space. The tumor was removed completely and verified histopathologically as neurilemmoma.

모바일 여행상품 앱 특성이 용이성, 유용성 및 행동의도에 미치는 영향

유순호 관광경영학회 2019 관광경영연구 Vol.91 No.-

The purpose of this study is to investigate the effect of mobile usage on the ease of use, usability and behavioral intention of travel product apps. Data collection was conducted from June 10, 2019 to June 20, A total of 500 copies of the questionnaires were distributed and 352 copies were collected. The factor analysis and the reliability test were conducted using SPSS 23.0 and AMOS 23.0 for 321 statistical analyzes and covariance structure analysis was conducted to verify the proposed research hypothesis. First, information and situationality showed significant effects on ease of use, but ubiquitous, economical, and experiential did not significantly affect ease of use. Second, ubiquity and situationality have a significant effect on usefulness, but informational, economical, and experiential have no significant effect on usefulness. Third, ease of use has a significant effect on usability. Fourth, experientiality has a significant effect on the degree of behavioral intention. However, ubiquitous, informational, economic, and situational factors did not significantly affect behavioral intentions. Finally, ease of use and usefulness have a significant effect on behavioral intention.

제주도 대표 토양에서 Alachlor 와 Chlorothalonil 의 흡착과 이동 연구

유순호,현해남,오상실 한국환경농학회 1995 한국환경농학회지 Vol.14 No.2

본 연구는 제주도 경작지에 분포되어 있는 3개 토양군의 대표토양인 혹색 화산회토 남원통, 농암갈색 화산회토 제주통 및 암갈색 비화산회토 무릉통의 alachlor와 chlorothalonil의 흡착과 이동 특성을 밝히기 위하여 수행되었다. 남원통은 유기물 함량 및 양이온치환용량이 매우 높은 토양이며, 무릉통은 매우 낮은 토양이었다. 흡착특성은 Linear 및 Freundlich 등온흡착식과 잘 일치하였다. 남원통에서 alachlor의 K 값은 21.38로서 제주통 및 무룽통에 비하여 5.4배 및 97.2배 높았으며, chlorothalonil의 K 값도 alachlor와 비슷한 경향이었으나 alachlor에 비하여 현저히 컸다. 각각 10.25 ㎎/ℓ의 alachlor와 1.50 ㎎/ℓ의 chlorothalonil 용액을 토주에 흘려보냈을 때, 무릉통, 제주통 및 남원통의 토주에서 alachlor는 0.265 PV, 0.47 PV 및 1.86 PV이 유출되었을 때 처음 검출되었으며, chlorothalonil은 3.71 PV, 4.7 PV 및 17.5 PV에서 처음 검출되었다. 무릉통, 제주통 및 남원통의 토주를 통과한 alachlor의 상대농도 C/C_o=1로 유출되는 양은 각각 1.1 PV, 3.7 PV 및 6.6 PV이었으며, chlorothalonil의 상대농도 C/C_o=0.2로 유출되는 양은 7.5 PV, 8.5 PV 및 27.5 PV로서 토양별 이동속도는 무릉통>제주통≫남원통이었다. 유출액중에 alachlor 및 chlorothalonil의 상대농도 C/C_o=0.5 및 C/C_o=0.05가 검출되는데 소요된 유출액의 양과 분배계수값 사이에는 매우 높은 유의성을 갖고 있었다. This study was conducted to investigate the adsorption characteristics, distribution coefficients, and movement of alachlor(2-chloro-2', 6'-dimethyl-N-(methoxymethyl) acetanilide) and chlorothalonil(tetrachloroisophthalonitrile) for the 3 soils sampled from major soil groups in Cheju Island. Namwon, Jeju, and Mureng soils used in this study were classified as black volcanic ash soil, dark brown volcanic ash soil and dark brown nonvolcanic soil, respectively. Organic carbon content and CEC of Namwon soil were very high and those of Mureung soil were very low. Linear and Freundlich adsorption isotherms were the best to fit the adsorption of alachlor and chlorothalonil in the soils. K value, Freundlich coefficient, of alachlor for Namwon soil was 21.38, being 5.4 and 97.2 times higher than that for Jeju and Mureung soils respectively. The values of chlorothalonil for the soils were similar to those of alachlor but were much higher than them. When Mureung, Jeju and Namwon soil columns were leached with a solution containing 10.25 ㎎/ℓ of alachlor and 1.50 ㎎/ℓ of chlorothalonil, alachlor was first detected at 0.265, 0,47, and 1.86 pore volume (PV) and chlorothalonil was 3.71, 4.7 and 17.5 PV, respectively. The pore volumes at C/C_o=1 of alachlor in the leachates from Mureung, Jeju and Namwon soil columns were 1.1, 3.7 and 6.6 PV and those at C/C_o=0.2 of chlorothalonil were 7.5, 8.5 and 27.5, respectively. This means that the deceasing order of the mobility of the chemicals in soils was Mureung soil>Jeju soil》Namwon soil. The pore volumes detecting C/C_o=0.5 of alachlor and C/C_o=0.05 of chlorothalonil in leachate were positively correlated with the distribution coefficients for the soils.

아연광산 주변 토양중 카드뮴 , 아연 , 구리 및 연의 화학적 형태별 함량

유순호,현해남,김계훈 한국환경농학회 1985 한국환경농학회지 Vol.4 No.2

亞鉛黃山 周邊에서 畓土壤과 玄米 36점을 採取하여 逐次分別分析에 의해 土壤 中 Cd, Zn, Cu 및 Pb의 各形態別 含量比를 구하고, 重金屬의 形態에 미치는 土壤 特性과 水稻의 吸收와 관계가 깊은 化學的 形態를 밝히기 위해 實驗하였다. 土壤 中 Cd의 形態別 含量은 置煥態, 有機態 및 carbonate 態가 거의 같았으며 全 Cd의 73.9%를 차지하였다. 토양 中 Zn,은 殘留性 Zn이 63.8%로 가장 높았다. Cu와 Pb의 形態別 含量比의 順位는 비슷하였다. 土壤의 pH가 높을수록 置換態 Cd, Zn, 및, Pb는 減少하였으며, 有機態와 carbonate 態, Cd, sulfide 態 Cd, Zn, 및 Pb는 增加했다. 土壤 中 有機物含量은 有機態 Cd, Zn, 및, Pb는 carbonate 態 Cu와 正의 相關을 보였다. 陽이온置換容量이 增加하면 置換態 Cd, Zn, Cu 및, Pb, 有機態 Cu는 減少하였으나 carbonate 態 Cd, sulfide 態 Cd, Zn, Cu 및, Pb, 殘留性 Cu는 增加하였다. 玄米 中 Cd 含量은 土壤 中 全 Cd, 有機態 Cd, carbonate 態, sulfide 態 Cd 및 殘留性 Cd와 높은 正의 相關을 보였다. 그러나 土壤 中 Pb는 어떠한 形態도 玄米 中 Pb 含量과 相關이 없었다. 土壤 中 水溶態와 置換態 Zn 含量은 玄米 中 Zn 含量과 높은 正의 相關을 보였다. Soil samples collected from paddy field adjacent to zinc-mining sites were sequentially extracted to assess chemical fractions of Cd, Zn, Cu and Pb. The purpose of this study was two fold; (i) to examine the chemical forms of heavy metal in soils by sequential extraction. and (ii) to determine relationships between the chemical distribution of heavy metal in the soil and the heavy metal content of the brown rice. The results are summarized as follows. The content of exchangeable, organically bound and carbonate Cd and residual Zn was 73.9% and 63.8% of total Cd and Zn in the soil, respectively. The content of exchangeable Cd, Zn and Pb in soil showed highly negative correlations with pH, organically bound Cd, carbonate Cd, sulfide Cd, Zn and Pb in soil showed highly positive correlations with pH. The content of organically bound Cd, Zn, Pb and carbonate Cu in soil showed highly positive correlations with organic matter content, while the content of sulfide Cu and residual Cd in soil showed highly negative correlation with organic matter content. The content of carbonate Cd, Zn, Pb and residual Cu in soil showed highly positive correlations with CEC, but the content of exchangeable Cd, Zn, Cu, Pb and organically bound Cu in soil showed highly negative correlations with CEC. The content of total, organically bound, carbonate, sulfide and residual Cd in soil were highly correlated with that of Cd in brown rice. The content of any Pb fractions in soil were not correlated with that of Pb in brown rice. The content of water soluble and exchangeable Zn in soil were highly correlated with that of Zn in brown rice.

The effect of selection attribute factors on visitors' satisfaction and intention to revisit traditional markets orient

유순호,김우혁,김경숙 대한관광경영학회 2019 觀光硏究 Vol.34 No.6

To orient strategies for activating cultural tourism in traditional markets in South Korea, we investigated how certain attributes of such markets affect visitors’ satisfaction with and intention to revisit them. In December 2018, 220 questionnaires were distributed to visitors at Bukpyeong Folk Market in Donghae, South Korea, and 202 completed questionnaires were subjected to multiple regression analysis. According to the results, we found four dimensions in terms of an attribute of traditional markets: convenience, merchant service, a major benefit, and related information. Moreover, the study found that there is a positive relationship between the attribute of traditional markets and visitors' revisit intention. This study provides discussions and implications for research and industry practices.

카지노호텔 종사원의 감정노동이 직무 스트레스 및 서비스 제공수준에 미치는 영향 - 강원랜드 호텔을 중심으로 -

유순호,안대희 관광경영학회 2021 관광경영연구 Vol.102 No.-

To investigate the effect of emotional labor of casino hotel employees on job stress and service delivery level. Data collection was conducted from October 1, to November 30, 2019 A total of 310 questionnaires were distributed, and 288 copies were finally used for analysis, excluding 22 questionnaires judged to be inaccurate in the questionnaire response. Statistical analysis was conducted through SPSS23.0 and AMOS statistical programs to achieve the research goal. As for the analysis results, frequency analysis and descriptive analysis were performed to understand demographic characteristics, and exploratory factor analysis, confirmatory factor analysis, and reliability analysis were performed to determine the reliability and validity of respondents. After verification, the hypothesis was verified by performing a covariance analysis. First, it is intended to examine the effect of employee emotional labor on job stress. Second, it is intended to examine how the emotional labor of employees affects the level of service delivery. Third, it is intended to investigate the relationship between job stress and service level of delivery. Based on the results of the empirical analysis, it is believed that it will be a basic data for the stable development of the hotel industry by suggesting an efficient human management plan for casino hotel employees.

토양내 카드뮴 , 아연 및 구리의 행동에 관한 연구 : 제1보 . 토양내 카드뮴 , 아연 및 구리의 흡착에 미치는 유기물처리의 영향 Ⅰ. Effect of Organic Matter Treatment on Adsorption of Cadmium , Zinc , and Copper in soils

유순호,현해남 한국농화학회 1985 Applied Biological Chemistry (Appl Biol Chem) Vol.28 No.2

Laboratory experiments were conducted to investigate the effect of compost and humic acid treatment on adsorption of Cd, Zn, and Cu in soils. Three soils differing in physical and chemical properties used in this experiments were Bonyrang (Typic Udifluvents) SL, Gangseo (Aquatic Eutrochrepts) L, and Gyorae (Typic Distrandepts) SiL. Adsorption of Cd, Zn, and Cu on the soils followed Langmuir isotherm up to 75 ppm of initial concentration. The adsorption maxima of Cd, Zn, and Cu for the Bonryang soil, the lowest in pH, organic matter content, and CEC, were the lowest of the three soils. Although the Gyorae soil derived from volcanic ash was the highest in organic matter content and CEC, the adsorption maxima of heavy metals for the Gyorae soil were lower than those for the Gangseo soil of which organic content and CEC were intermidiate. The adsorption maxima/CEC ratios for the Bonryang, the Gangseo, the Gyorae soils were found to be in the range of 23∼27%, 28∼57%, and 11∼14% respectively. The bonding energy constants of Cd, Zn, and Cu for the soils were in the order of Gangseo$gt;Bonryang$gt;Gyorae soil. The adsorption maxima of Cd, Zn, and Cu for the Bonryang soil increased with compost treatment by 100∼210%, 90∼230%, and 130∼290% respectively, while little difference was observed when the soil was treated with humic acid Bonding energy constants of Cd, Zn, and Cu for the Bonryang soil increased significantly with compost treatment, and showed insignificant correlation with humic acid treatment.

수도(水稻)에 대(對)한 Cytozyme 처리효과(處理效果)

유순호,박무언,Yoo, Sun-Ho,Park, Moo-Eon 한국응용생명화학회 1980 Applied Biological Chemistry (Appl Biol Chem) Vol.23 No.4

Biological support products로서 알려진 효소복합제(酵素複合劑)인 Cytozyme이 한국(韓國)의 재배환경조건(栽培環境條件)에서 수도수량(水稻收量)에 미치는 효과를 검토(檢討)하였다. 진흥품종(振興品種)을 사용(使用)하여 강서사양토(江西砂壤土)(Fluvaquentic Eutrochrepts)의 서울대학교(大學校) 농과대학(農科大學) 답작포장(畓作圃場)에서 Seed Plus Cytozyme 종자침지(種子浸漬), Crop Plus Cytozyme 묘근침지(苗根浸漬), 생육기별(生育期別), 농도별(濃度別), Crop Plus 엽면살포(葉面撒布) 등의 효과를 분석(分析)하였다. 1980년(年)의 불리(不利)한 기상조건(氣象條件) 및 병발생(病發生)으로 반복간(反覆間) 변이(變異)가 심(甚)하여 처리간(處理間)에서 통계적(統計的)인 유의성(有意性)은 없었으나 엽면살포(葉面撒布)는 유수형성기(幼穗形成期), 출수기(出穗期)보다는 분벽기(分蘗期)에, 처리수준(處理水準)에서는 450ml/ha보다는 900ml/ha 처리(處理)하는 것이 증수(增收)되는 영향이었다. 종자침적(種子浸漬) 및 엽면살포(葉面撒布)의 이중처리(二重處理)한 효과가 가장 높았으며 무처리구(無處理區)에 비(比)하여 16%의 증수(增收)를 나타내었다. The effects of two Cytozyme complexes, Crop Plus and Seed Plus, applied to rice (variety: Jinheung) were evaluated during the 1980 rice growing season. Primary objectives were directed to determine the effects of rates, timing and method of application of the products on the yield of rice. For the Seed Plus test, seed was soaked in the diluted Seed Plus solution(1 : 100) for 24 hours just prior to sowing. The Crop Plus was diluted to 1 : 12 for seedling treatment. Seedling roots were immersed in the diluted solution for 3 hours before transplanting. Crop Plus spray applied at the rates of 450ml/ha or 900ml/ha when rice plants were in the panicle initiation, heading or tillering stage respectively to compare the effects of rates and timing of application. The weather was not favorable for rice growth during the growing season except the tillering stage. The foliar spray at the tillering stage was more effective than the spray at the panicle initiation, and the rates of 900ml/ha showed better results than 450ml/ha. Combination of seed treatment and foliar spray increased grain yield by 16% over untreated control plots.