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조영혁 ( Cho Young Hyeok ),조석진 ( Cho Seok Jin ),권혁수 ( Kwon Hyug Soo ),유동희 ( Yoo Dong Hee ) 한국정보시스템학회 2019 情報시스템硏究 Vol.28 No.1
Purpose The purpose of this study is to explain the agrophotovolatic system built by the Korea South-East Power Company and to propose methods to activate the agrophotovolatic system for the development of the renewable energy industry. Design/methodology/approach We conducted a three-step simulation in order to design a photovoltaic module, and we built the agrophotovolatic system based on the results of the simulation. Then, we analyzed the monthly generation of power and the rice harvests produced on farmland using the photovoltaic module. Based on the results of the analysis, we proposed institutional improvements to increase the use of the agrophotovolatic system, and we proposed new business models to increase the participation of farmers and business persons. Findings When we compared the agrophotovolastic system with the general photovoltaic system, we found that the agrophotovoltaic system had higher utilization rates and power generation. An analysis of rice produced on farmland using the photovoltaic module showed that more than 80% of the rice produced on general farmland was harvested. We suggested activation plans that involved the revision of the farmland law and the introduction of renewable energy certificate (REC). We also proposed a land lease model and a farmer participation model as two new business models, and we conducted economic evaluations and sensitivity analyses for both models.
복부 둔상 환자에게 간 손상 예측을 위한 Liver Transaminase의 유용성
이종석 ( Jong Seok Lee ),오성찬 ( Sung Chan Oh ),김혜진 ( Hye Jin Kim ),조석진 ( Suk Jin Cho ),이상래 ( Sang Lae Lee ),류석용 ( Seok Yong Ryu ) 대한외상학회 2010 大韓外傷學會誌 Vol.23 No.2
Purpose: The liver is the second most common organ injured by blunt abdominal trauma. The purpose of this study was to determine the utility of liver transaminase in screening blunt abdominal trauma patients for traumatic liver injury. Methods: We retrospectively reviewed the medical records of 231 patients who sustained blunt trauma and were at risk for traumatic liver injury between June 2009 and August 2010. All of them underwent a focused assessment with sonography for trauma (FAST) and abdominal computed tomography (CT). Based on the diagnosis of abdominal CT, patients were divided into two groups: group I with liver injury and group II without liver injury. We compared the two groups and calculated the sensitivity, the specificity and the predictive values of serum aspartate aminotransferase (AST) and serum alanine aminotransferase (ALT) by using multiple cutoff values. Results: Of 231 patients with no abdominal free fluid in the FAST, 33 had traumatic liver injury on abdominal CT. The mean AST and ALT levels in group I (311.6 IU/L and 228.1 IU/L, respectively) were significantly higher than the values in group II (48.4 IU/L and 35.6 IU/L, respectively). The cutoff to distinguish liver injury is 60 IU/L for AST and 58 IU/L for ALT, with 93.8% sensitivity and 79.8% specificity for AST, and 90.6% sensitivity and 87.4% specificity for ALT. Conclusion: We recommend that all patient with suspected blunt abdominal trauma be evaluated using serum liver transaminase as a screening test for liver injury even though no abdominal free fluid is shown on the FAST. If AST > 60 IU/L and/or ALT > 58 IU/L, abdominal CT was useful to confirm liver injury in this study (J Korean Soc Traumatol 2010;23:151-156).
고영길,안지영,류석용,이상래,조석진,김미란,Ko, Young-Gil,Ahn, Ji-Young,Ryu, Seok-Yong,Lee, Sang-Lae,Cho, Suk-Jin,Kim, Mi-Ran 대한임상독성학회 2006 대한임상독성학회지 Vol.4 No.2
Neurotoxic shellfish poisoning (NSP) can result from eating filter-feeding shellfish carrying brevetoxins produced by the marine dinoflagellate Krenia brevis (formally Gymnodinium breve). Brevetoxins enhance sodium entry into cells via voltage-sensitive sodium channels and have an excitatory effect. The incubation period is three hours (range 15 minutes-18 hours). NSP is characterized by gastroenteritis combined with neurologic symptoms. Gastrointestinal (GI) symptoms include abdominal pain, nausea, diarrhea and burning pain in the rectum. Neurologic symptoms are paresthesia, reversal of hot and cold temperature sensation, myalgia, headache, vertigo, and ataxia. Other symptoms may include malaise, tremor, dysphagia, bradycardia, decreased reflexes, dilated pupils, seizure, and coma. The health problem caused by K. breviscan be associated with a red tide bloom. We encountered 3 cases of neurotoxic shellfish poisoning. They all presented with GI and neurologic symptoms andrecovered after conservative treatment.
이승원 ( Seung Won Lee ),조석진 ( Suk Jin Cho ),류석용 ( Seok Yong Ryu ),이상래 ( Sang Lae Lee ),김성은 ( Sung Eun Kim ),김성준 ( Sung Jun Kim ),안지영 ( Ji Young Ahn ) 대한외상학회 2006 大韓外傷學會誌 Vol.19 No.2
Purpose: There are two theories about the relationships between facial fractures and cranial injuries. One is that facial bones act as a protective cushion for the brain, and the other is that facial fractures are the marker for increased risk of cranial injury. They have been debated on for many years. The purpose of this study is to identify the relationship between facial fractures and cranial injuries. Methods: A retrospective study was performed on 242 patients with facial fractures. The data were analyzed based on the medical records of the patients: age, gender, cause of injury, Injury Severity Score (ISS), alcohol intake, type of facial fractures, and type of cranial injury. The patients were divided into two groups: facial fractures with cranial injury and facial fractures without cranial injury. We compared the general characteristics between the two groups and evaluated the relationship between each type of facial fracture and each type of cranial injury. Results: Among the 242 patients with facial bone fractures, 96 (39.7%) patients had a combination of facial fractures and cranial injuries. Gender predilection was demonstrated to favor males: the ratio was 3:1. The mean age was 36.51±19.63. As to the injury mechanism, traffic accidents (in car, out of car, motorcycle) were statistically significant in the group of facial fractures with cranial injury (p=0.038, p=0.000, p=0.003). The ISS was significant, but alcohol intake was not significant. No significant relationship between facial fractures and skull fractures was found. Only maxilla fractures, zygoma fractures, and cerebral concussion had a significant difference in cranial injury (p=0.039, p=0.025). Conclusion: There is a no correlation between facial fractures and skull fractures, which suggests that the cushion effect is the predominent relationship between facial fractures and cranial injuries. (J Korean Soc Traumatol 2006;19:150-158)
충수돌기염 진단에 사용되는 영상의학검사의 선택에 영향을 미치는 요인
이용찬(Yong Chan Lee),류석용(Seok Yong Ryu),조석진(Suk Jin Cho),이상래(Sang Lea Lee),오성찬(Sung Chan Oh),김홍용(Hong Yong Kim) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.5
Purpose: The aim of this study is to evaluate the advanced radiographic imaging that’s used for making the diagnosis of an acute appendicitis, and also the factors that influence selecting the imaging modality. Methods: We retrospectively reviewed the data of 420 patients who underwent an appendectomy as an emergency procedure in our hospital from January 1, 2005, to December 31, 2006. All the cases were categorized into three groups by the radiologic imaging tests. One was the ultrasonography (US) only group, another was the computed tomography (CT) only group and the third was both the US and CT scan group. Age, gender, height, weight, the Alvarado score (AS) and the body mass index (BMI) were compared between the 3 groups. I assessed the reason for choosing computed tomography (CT) to assist in making the diagnosis. Results: Four hundred twenty patients underwent operative exploration under the presumed diagnosis of appendicitis. Of those, 348 patients underwent US, 48 underwent CT scanning and 24 underwent both US and CT scanning. The mean age and BMI were significantly higher in the CT only group (P<0.001 and P=0.008, respectively). The most common reason for choosing CT scanning was that the physician suspected other diseases other than appendicitis due to an atypical presentation on the physical examination. Conclusion: US was the most commonly used radiologic imaging study for making the diagnosis of appendicitis. CT was more frequently used for the old or obese patients for making the differential diagnosis.