기능성 쌀 수요분석

조재환 한국농업정책학회 2005 농업경영정책연구 Vol.32 No.4

The objective of this paper is to find out the factors which influence to purchase the functional rice. The data used in demand modeling are characterized by the fact that the functional rice consumption is zero in the case of a lot of household during the survey period. Therefore, limited dependent variable models are used to determine factors influencing on functional rice demand. Of limited dependent variable models, tobit model is proved to provide a better representation of analysing functional rice purchase behavior. Results indicate the level of the perception and confidence on the functional rice, and the careful concern of the new rice products are significant determinants of consumption level with the household income variable. The results of this paper could be an important information for establishing the functional rice marketing strategy effectively.

Neuropathic Pain after Spinal Surgery

조재환,이재협,송광섭,홍재영 대한척추외과학회 2017 Asian Spine Journal Vol.11 No.4

Neuropathic pain after spinal surgery, the so-called failed back surgery syndrome (FBSS), is a frequently observed troublesome disease entity. Although medications may be effective to some degree, many patients continue experiencing intolerable pain and functional disability. Only gabapentin has been proven effective in patients with FBSS. No relevant studies regarding manipulation or physiotherapy for FBSS have been published. Spinal cord stimulation (SCS) has been widely investigated as a treatment option for chronic neuropathic pain, including FBSS. SCS was generally accepted to improve chronic back and leg pain, physical function, and sleep quality. Although the cost effectiveness of SCS has been proved in many studies, its routine application is limited considering that it is invasive and is associated with safety issues. Percutaneous epidural adhesiolysis has also shown good clinical outcomes; however, its effects persisted for only a short period. Because none of the current methods provide absolute superiority in terms of clinical outcomes, a multidisciplinary approach is required to manage this complex disease. Further studies concerning the etiology, diagnosis, treatment, and cost effectiveness of FBSS are warranted to deepen our understanding of this condition.

Synthesis and Application of Conducting Polyaniline-Fe<SUB>3</SUB>O<SUB>4</SUB> Nanohybrid by Click Chemistry Reaction

조재환,Yadav, Santosh Kumar,Mahapatra, Sibdas Singha,Cho, Jae Whan 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.6

A conducting polyaniline-$Fe_3O_4$ nanohybrid was synthesized via click coupling of iron oxide nanoparticles and 2-ethynylaniline. Covalent functionalization of the azide-functionalized iron oxide nanoparticles and the 2-ethynylaniline was confirmed with Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy, and the coating of polyaniline on iron oxide nanoparticles was confirmed with field-emission scanning electron microscopy. The nanohybrid incorporated into a poly(vinyl alcohol) (PVA) matrix by solution casting showed excellent compatibility with the PVA. Consequently, the mechanical properties and electrical conductivities of the resultant composite films were improved remarkably. This click coupling protocol offers the possibility of completely combining the extraordinary performance of nanohybrids with PVA properties.

오렌지 수입이 국내산 과일 및 과채 가격에 미친 영향

조재환 한국유기농업학회 2015 韓國有機農業學會誌 Vol.23 No.4

A Linear Approximated Inverse Almost Ideal Demand System, suggested by Eales and Unnevehr, is estimated with monthly data set of Korean fruits consumption. LA/IAIDS consists of 6 demand equations which correspond to domestically produced Hanrabong, overwintering mandarin, strawberry, melon and tomato with imported orange. The results indicate that price and scale flexibilities are negative, as expected. And the significance is that a 10% increase in imported orange quantity is associated with 5.5% declines in the price of Korean Hanrabong while the price of other fruits is minimally affected. In addition, the estimate of scale flexibility of Hanrabong (-2.96) is much smaller than any other fruit. Hanrabong farmer might be in the face of deficit operation as a consequence of the substitution effect if orange would be imported in accordance with the Korea-U.S. free trade agreement.

산업안전교육이 건설현장에 미치는 영향에 관한 실증적 연구

조재환,Jo, Jae-Hwan 한국건설안전협회 2010 建設 安全技術 Vol.51 No.-

In terms of deregulation requests from business, incidents at construction sites are rapidly increasing after reducing the regular safety training hours. Especially, to prevent incidents through safety trainings for construction site workers, who have lots of hazardous tasks than general manufacturing, is not only to protect property of both the companies and the country but also to increase their profits. That is why there are loud voices regarding that the safety training is a core mandatory to prevent industrial incidents. But, most companies, as soon as the deregulation for safety training is implemented, mitigated conducting safety trainings to prevent incidents. With this, theincidents are currently to be increased and caught in a vicious circle of many incidents at the smaller companies because of their absentmindedness regarding safety training due to their poorness as subcontractors of major companies, comparing to major companies. This study explains that incident factors are roughly divided into technical factor, managerial factor, and educational factor. And, we confirmed that the educational factor led by deficiency safety awareness and knowledge was the major factor.

산업재해(건설업)에 따른 안전교육 실태분석에 관한 연구 - G 건설사 사례를 중심으로 -

조재환 대한안전경영과학회 2010 대한안전경영과학회 학술대회논문집 Vol.2010 No.11

과수농가의 경영위험 관리 실태

조재환,박준형,김태균 한국농업정책학회 2005 농업경영정책연구 Vol.32 No.1

The risk environment of farmers is changing due to increasing market liberalization and industrialization of agriculture. These changes lead to new risks, and new risk management strategies are needed. This paper analyzes the nature of risk and the variety of Risk Management Strategies available for the fruit farmers using a survey data. The results of this paper could be an important information for the improvement of risk management in Korea.

A Study on Quantitative Analyses Before and After Injection of Contrast Medium in Spine Examinations Performed by Using Diffusion Weighted Image

조재환,이해각,김용균,동경래,정운관,주규지 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.4

This study examined the changes in the signal-to-noise ratio (SNR), the contrast-to-noise ratio (CNR) and the apparent diffusion coefficient (ADC) of metastatic cancer in the lumbar region by using diffusion weighted image taken with a 1.5 T (Tesla) magnetic resonance (MR) scanner before and after injecting a contrast medium. The study enrolled 30 healthy people and 30 patients with metastatic spine cancer from patients who underwent a lumbar MRI scan from January 2011 to October 2012. A 1.5 T MR scanner was used to obtain the diffusion weighted images (DWIs) before and after injecting the contrast medium. In the group with metastatic spine cancer, the SNR and the CNR were measured in three parts among the L1 – L5 lumbar vertebrae, which included the part with metastatic spine cancer, the area of the spine with spine cancer, and the area of spine under the region with cancer. In the acquired ADC map image, the SNRs and the ADCs of the three parts were measured in ADC map images. Among the healthy subjects, the measurements were conducted for the lumbar regions of L3 – L5. According to the results, in the group with metastatic spine cancer, the SNR in the DWI before the contrast medium had been injected was lowest in the part with spine cancer. In the DWI after the contrast medium had been injected, the SNR and the CNR were increased in all three parts. In the ADC map image after the contrast medium had been injected, the SNR decreased in all three parts compared to the SNR before the contrast had been injected. The ADC after had been injected the contrast medium was decreased in all three parts compared to that before the contrast medium had been injected. In the healthy group, the SNR was increased in the L3 – L5 lumbar regions in the DWI. In the ADC map image, the SNR in all the three parts was decreased in the DWI after injecting the contrast medium had been injected. The ADC in the ADC map image was also decreased in all three parts.

Europolymer Congress 2003 참관기

조재환 건국대학교 산업기술연구원 2004 건국기술연구논문지 Vol.29 No.-

양측 폐농양을 동반한 Boerhaave Syndrome 1예

조재환,박태욱,조세현,나종순,박두호,차상복,송소향,최규용,박성규,임국희 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.6

Spontaneous esophageal perforation (Boerhaave Syndrome) is an unusual condition that frequently leads to fatal complications. It typically occurs with rigorous emesis after an unduly large meal or heavy drinking. Its diagnosis is often delayed in almost all cases due to nonspecific symptoms and signs, resulting in increased morbidity and mortality. Therefore early diagnosis and appropriate treatment are very important. Recently we experienced a case of esophagogastric junctional perforation accompanied by bilateral empyema and mediastinitis after heavy alcohol drinking in a 56-year-old male patient. He was presented with hematemesis and abdominal pain. We diagnosed him using esophagography and chest CT. Thus, we report a case with a brief review of related literatures.