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전기차산업의 기업 외부요인과 내부전략 관련 사건이 관련 기업의 주가에 미치는 영향에 대한 연구
강태경(Tae Kyeong Kang),황해수(Haesu Hwang),이희상(Heesang Lee) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.10
본 연구는 전기차 산업에서의 외부환경요인과 내부경영전략들이 주가에 미치는 영향을 사건분석방법론을 사용하여 연구했다. 한국언론진흥재단의 기사검색시스템에서 29개의 전기차 관련 국내 상장기업을 기준으로 2019년의 이들 요인에 관련한 248건의 사건을 발췌하였다. 먼저 내부전략 관련 5개 사건 유형과 외부요인 5개 사건 유형을 4개의 우호적인 사건 유형과 6개의 적대적인 사건 유형으로 구분하였다. 구분된 우호적 사건 143건과 적대적 사건 105건에 대해 각각 긍정적, 부정적 주가 영향이 있는 것을 확인하고 사전 정보의 누출은 없고 사건 유형에 따라 사건후 효과의 지속성은 다르게 나타남을 밝혔다. 다음으로 우호/적대 사건 유형을 외부환경요인과 내부전략 관련 사건 유형으로 구분하여 각각 주가에 대한 긍정적 효과와 부정적 효과를 확인하고, 주가의 영향이 얼마나 지속되는지를 분석하였다. 또한 29개 기업들을 공급망 사슬 위치에 따라 3개 그룹으로 구분하여 일원분산분석한 결과, 부품/소재 기업들인 C그룹에서 주가에 미치는 영향이 가장 큼을 밝혔다. 본 연구를 통해 투자자들이 외부환경과 내부전략 사건에 대해 경쟁재와 시장 환경 또는 공급망 사슬상 위치에 따라 다른 평가를 한다는 점은 전기차 관련 기업의 내부전략 전개에 의미 있는 시사점을 주었다. 또한 정부정책이 전기차뿐만 아니라 경쟁재인 내연기관차에 대해서도 전개되므로 산업 육성/규제 정책은 이를 균형 있게 반영해야 된다는 시사점을 얻을 수 있었다. This study used event analysis to examine the impact of external factors and internal management strategies on stock prices in the electric vehicle industry. We extracted 248 events in 2019 related to these factors from articles regarding 29 Korean-listed companies linked to electric vehicles from the Korea Press Foundations article search system. First, the five event types related to management strategies and five event types related to external factors were categorized into four friendly and six hostile event types. We checked whether there was a positive or negative stock price impact for 143 friendly and 105 hostile events, respectively. Next, we divided the 248 events into external environmental factors and internal strategy-related events and examined the positive or negative effects on stock prices. We also divided the 29 companies into three groups according to their positions in the supply chain. Group C, comprising parts/materials companies, had the largest impact on stock prices. This study showed that investors evaluate external environment and internal strategy events differently depending on the competition, market environment, or position in the supply chain. In addition, since government policies are developed not only for electric vehicles but also for internal combustion vehicles, which compete with electric vehicles, the resultant industrial policies should reflect this position in a balanced manner.
손경애(Kyeong-Ae Son),강태경(Tae Kyeong Kang),박병준(Byeong Jun Park),진용덕(Yong-Duk Jin),길근환(Geun-Hwan Gil),김찬섭(Chan Sub Kim),김진배(Jin Bae Kim),임건재(Geon-Jae Im),이기운(Key-woon Lee) 한국농약과학회 2012 농약과학회지 Vol.16 No.4
This study was carried out to clarify the effects of the application of pesticide by different spray nozzle types on pesticide residues. The average droplet size and discharge rate were investigated when the manual compressed sprayer with two head disk type nozzle and the knapsack engine powered sprayer with two head fan shape nozzles were used. The fan type nozzles were classified into three types by the number of orifice in the nozzle. Three type nozzles tested were fan with one orifice, fan with two orifices and fan with three orifices. Fan (trade name : D-3) with 2.4 L/min. of the discharge rate and 76 μm of the average droplet size while maintaining constant pressure 1.1 ± 0.2 MPa, and fan D-35 with 2.6 L/min. and 90 μm while maintaining constant pressure 1.0±0.2 MPa were appropriate. The orifice size of D-3 was 0.65 mm length × 0.45 mm width and the orifice size of D-35 was 0.62 mm length × 0.46 mm width. The residue levels of imidacloprid on perilla leaves among four applications by four different nozzles show significantly difference with 5% significance level. The residue levels 3.76~3.92 mg kg<sup>?1</sup> by fan or disk type is smaller than 4.52~4.92 mg kg<sup>?1</sup> by fan II or fan III. The residue levels of imidacloprid on perilla leaf were different depend on the spray nozzles type.
손경애(Kyeong-Ae Son),강태경(Tae Kyeong Kang),박병준(Byeong Jun Park),김택겸(Taek-Kyum Kim),길근환(Geun-Hwan Gil),김찬섭(Chan Sub Kim),김진배(Jin Bae Kim),임건재(Geon-Jae Im),이기운(Key-woon Lee) 한국농약과학회 2012 농약과학회지 Vol.16 No.3
This study was carried out to clarify effects of field location and sprayer on the level of pesticide residue in chilli peppers. As confirmed by statistical analysis, the residue levels in green pepper among three greenhouses did not show significant difference at the first day after spraying with the same engine sprayer and nozzle. But the residue levels in green peppers collected from the exposed outside of crop were 2 times higher than those from the hidden inside. The sampling site was one of variation elements of pesticide residue. The residue levels after application by knapsack engine powered sprayer were 1.7 times higher than those by manual compressed sprayer. As the spraying pressure of the engine power sprayer is 2 times higher than the commonly used pressure of the manual compressed sprayer, the pressure of the sprayer and nozzles were considered to affect on the residue levels in peppers.
명승운(Seung Woon Myung),김동현(Dong Hyun Kim),김명수(Myung Soo Kim),강태경(Tae Kyeong Kang),민혜기(Hye Ki Min),장윤정(Yoon Jung Jang),손동렬(Dong Ryul Sohn),홍영훈(Young Hun Hong),신창식(Chang Shik Shin) 한국응용약물학회 2000 Biomolecules & Therapeutics(구 응용약물학회지) Vol.8 No.3
The bioequivalence of two tiropramide products was evaluated in 18 health male volunteers following oral administration. Test product was Tiram^R tablet (Shin Poong SP-102) (Shin Poong Pharm. Co., Ltd.) and reference product was Tiropa^R tablet (Dae Woong Pharm. Co., Ltd.) One capsule of the test and reference product containing 100 mg of tropramide · hydrochloride was administered to the volunteers by randomized two period cross-over study (2 X 2 Latin square method). The drug concentration in plasma was determined by GC/MS for over a period of 12hours after administration. Analysis of variance reveal that there are no differences in AUC (area under the plasma concentration-time curve from time zero to infinity), Cmax (maximum plasma concentration) and Tmax (time to reach Cmax). The differences of mean AUC, Cmax and Tmax between two products were 3.85, 1.47 and -3.6%, respectively. Minimum detectable differences (%) at α=0.1 were all less than 20% given as a guideline (18.07, 17.00 and 20.69% for AUC, Cmax and Tmax, respectively) . From these results, the two products are bioequivalent.