지리적 표시제에 대한 관심이 농산물 가격변화 예측에 미치는 영향 연구

최효신(Hyo Shin Choi),손소영(So Young Sohn) 대한산업공학회 2015 대한산업공학회지 Vol.41 No.4

Geographical Indication (GI) has been used with the expectation to influence customer buying behavior. In this research, we empirically investigate if such relationship exists using apple price changes in Korea along with web search traffic reflecting customers’ interest in GI. The experimental results indicate that the apple price of the past, apple supply and web search traffic including GI name were significant on the prediction of price change of Chungju while web search traffic of regional name and that of product were significant for Cheongsong apples with GI. In Yeongcheon with no GI, the apple price of the past turns out to be significant only. The results indicated that interests in GI can help the price prediction but the regional name itself can play the same role, if the GI product is well known in association with the region.

댐수몰이주민 지원방안 연구 : 이주대책을 기준으로

최효일 한국토지보상법연구회 2008 土地補償法硏究 Vol.8 No.-

한국형 전술데이터링크 시스템 구현을 위한 무선모뎀 시스템 설계

최효기,장호준,송영환,장동운,주재우,서난솔,Choi, Hyo-Ki,Jang, Ho-Joon,Song, Young-Hwan,Jang, Dhong-Woon,Joo, Jae-Woo,Seo, Nan-Sol 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.6

Next Generation Weapon system from the center of the platform to share information in real-time Network Centric Warfare(NCW: Network Centric Warfare) has been changed. Data link system is defined as a network. That is, all in real-time battlefield information is to enable sharing. Data link system is classified as a precision strike, Monitoring/control, control of a Patriot missile battery systems. These systems are most effective in a Joint warfare and precision strike. Data Link Systems(Data Communications) implementation is accomplished by using the KDLM(Korean Data Link Modem) and Radio Transceiver. KDLM is operated in conjunction with the legacy Radios(re-using fielded HF/VHF/UHF radio systems). In this paper, we describe in terms of KDLM system design. In this paper, the proposed design structure is how to effectively interact with legacy various radio. First, The results provide an analysis of that Dynamic TDMA system and apply modem structure. Radio characteristics data are necessary for an effective TDMA system design. This article analyzes the test results and describes the structure to improve the receive performance.

자작자동차 너클의 구조해석

최효서(Hyo-Seo Choi),권양선(Yang-Seon Kwon),이태섭(Tae-Seob Lee),이환희(Hwan-Hee Lee),이종선(Chong-Sun Lee) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.4

이상적인 혈중 콜레스테롤 조절 지침: 2013년 ACC/AHA 권고안 분석

최효인,한기훈 대한의사협회 2014 대한의사협회지 Vol.57 No.10

Atherosclerotic cardiovascular disease (ASCVD) is the most important public health problem worldwide in terms ofthe size of expenditures in most healthcare budgets. In November 2013, the American College of Cardiology andAmerican Heart Association (ACC/AHA) released a clinical practice guideline on the treatment of blood cholesterolto reduce ASCVD risk in adults. Based on the design and results of the randomized clinical trials and meta-analysespublished through July 2013, four groups of individuals were identified for whom an extensive body of randomizedclinical tria evidence demonstrated a clear reduction in ASCVD events from statin therapy with a good margin of safety. Together with ASCVD, in severe hypercholesterolemic (low-density lipoprotein cholesterol ≥190 mg/dL) or diabeticsubjects, the guideline recommends the use of statins if the newly-developed Pooled Cohort Equations estimate a10-year ASCVD risk of equal to or higher than 7.5%. The guideline recommendations represent a new paradigm fortreating cholesterol focused on using the appropriate intensity of statin therapy for those most likely to benefit, whilethe guideline has eliminated low-density lipoprotein cholesterol and non–high–density lipoprotein cholesterol targets. Non-statin therapies were discouraged due to the lack of evidence for their production of acceptable ASCVD riskreduction benefits. This radical shift away from the set of previous guidelines has created controversy and confusion. This article reviews the 2013 ACC/AHA guideline for the treatment of blood cholesterol to reduce ASCVD risk in adultsand the optimal strategies for using this guideline in clinical practice.

가을 황사발생 시 고비사막에서 수송된 극미세입자가 입자상물질 농도 (PM10, PM2.5, PM1)에 미친 영향 -2003년 10월 27일 사례-

최효 건국대학교 기후연구소 2010 기후연구 Vol.5 No.3

황사발생 전과 후인 2003년 10월 26일 00시부터 29일 18시까지 한국의 동쪽 연안에 있는 강릉시에서 PM10, PM2.5와 PM1 매 시각별 분포를 조사하였다. 황사가 고비사막으로부터 유입되기 전까지는 매 시각 PM10 농도가 20μg/m3 내외, PM2.5가 10μg/m3 내외, PM1가 5μg/m3 내외로 매우 낮은 농도를 나타내지만 황사가 유입된 10월 27일 09시부터 28일 05시까지는 PM10의 농도의 범위가 48.20~154.57μg/m3이며, 평상시 비해PM10의 농도가 3.8배로 높았다. 유사하게 PM2.5의 농도는 26.92~93.19μg/m3의 변화폭을 나타내며, 최대 3.4배로 높게 나타났고, PM1의 농도는 19.63~76.05μg/m3의 변화폭을 갖고, 최대 14.1배가 되었다. 황사가 나타나는 동안에는 수송된 황사먼지의 집중적인 유입과 동시에 도로 위의 차량의 밀집과 일몰 후 주거지역에서의 보일러 가동으로 출근시각인 09시와 퇴근시각인 17시에 PM의 고농도가 나타났다. 황사가 관측되기 전에는 미세입자와 극미세입자의 비율을 나타내는 (PM10-PM2.5)/PM2.5는 0.75~7.12, 극미세입자와 초극미세입자의 비율을 나타내는 (PM2.5-PM1)/PM1는 0.23~1.90로 나타났으며, 황사가 관측되는 기간에는 0.60~1.25와 0.21~0.37을 각각 나타내었다. 강릉시에 황사가 나타나기 전에는 2.5μm 큰 입자들이 2.5μm 이하의 극미세입자보다 PM10의 농도에 큰 영향을 주었으나, 황사가 관측되는 기간에는 2.5μm 이하의 극미세입자들이 PM10의 고농도 출현에 크게 기여하였다. 황사가 관측되는 기간에는 지역의 PM고농도에 2.5μm 이상의 큰 입자가 기여하는 일반적인 양상과 반대였다.

개별소비세 일몰제가 회원제골프장의 내장객변화에 미치는 영향

최효기(Choi Hyo-Ki),유선종(Yoo Seon-Jong) 한국주거환경학회 2011 주거환경(한국주거환경학회논문집) Vol.9 No.2

This study attempted to analyze the monthly trends of golf course visitors per hole between two groups of the members-only golf courses in the metropolitan area of Incheon and Kyonggi province and of the non-metropolitan area of Kangwon and Chungcheong provinces before the application of reduction and exemption of the individual income taxes(21 months between Jan, 2007 and Sept, 2008) and during its period(27 months between Oct, 2008 and Dec, 2010) due to changes in the tax policy of government in the operation of the members-only golf course. For this purpose, this study employed the analysis instrument such as PASW Statistics(Version 18). As a result, the following findings were obtained: An attempt was made to analyze the hypothesis that the "reduction and exemption of the individual consumption taxes would reduce visitors to the golf courses in the metropolitan area and increase those in the non-metropolitan area such as Kangwon and Chungcheong areas." Statistical analysis showed that the hypothesis was significant. That is, it was found that there was no difference in the result of T-test of the matched sample using data on the number of visitors to the members-only golf courses in the central area(Kyonggi, Incheon, Kangwon and Chungcheong areas) before the enforcement of reduction and exemption of the individual consumption tax and during its period. The average number of the golf course visitors was reduced. And it was found that there was a difference in the mean between two groups of the members-only golf courses in the non-metropolitan central area(Kangwon and Chungcheong areas). The average number of the visitors increased. But an attempt was made to compare the trend of increase and decrease of the number of visitors per hole and that of increase of the number of simple golf course visitors. As a result, it was found that the number of visitors per hole reduced though the mean of the number of visitors was greatly increased. It is thought that it is more significant to use data on the number of simple golf course visitors in order to judge the effectiveness of the sunset law of the individual consumption tax. To investigate changes in the number of visitors per hole, it is thought that it is necessary to assume the rate of increase in holes for analysis.

황사영향 하의 PM1, PM2.5, PM10농도 특징

최효 대한환경공학회 2008 대한환경공학회 학술발표논문집 Vol.2008 No.12

A Case of Carbon Monoxide Poisoning with Thrombus in Right Atrium

최효인,김대희,선병주,김준석,양지은,김선묵,박소영,송종민,강덕현,송재관 한국심초음파학회 2012 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.20 No.4

Carbon monoxide is a nonirritant, odorless, colorless gas. Its effects are prominent in organs most sensitive to oxygen deprivation,such as the heart, brain, and kidney. Although less frequently, an association between thromboembolic events and carbon monoxide poisoning has been shown in the literatures. In this case, we report a case of atrial thrombus associated with carbon monoxide poisoning.

고비사막에서 황사의 유입 전, 후의 강릉시에서 매 시각별 PM10, PM2.5, PM1농도에 영향을 미치는 대기경계층과 상관관계 예측

최효,이미숙 건국대학교 기후연구소 2012 기후연구 Vol.7 No.1

2003년 10월 26~29일까지 고비사막으로부터 강릉시로 황사의 유입 전, 후의 매 시각별 PM10, PM2.5와 PM1농도의 영향을 미치는 대기경계층과 PM농도 간의 상관관계 및 회귀식을 조사되었다. 고비사막에서 유입된 황사와 차량에서 방출되는 대기오염물질 및 도로의 비산먼지가 결합되고, 열적내부경계층이 수축되어 강릉시내 PM농도가 09시 매우 높았다. 수축된 야간접지역전층 내에서 황사, 차량의 배기가스와 주거지역의 난방보일러에서 방출된 대기오염물질이 추척되어 퇴근시간인 17시에 최대농도가 나타났다. 황사의 유입 전에 PM10과 PM2.5(PM2.5와 PM1, PM10과 PM1) 간의 상관계수는 0.90(0.99, 0.84)이었고, 황사 유입 기간에는 0.98(1.00, 0.97), 황사의 유입이 종료된 후에는 0.23(0.81, -0.36)로 매우 낮았다.