SFBC OFDM 에서 다중 주파수 오프셋으로 발생한 간섭을 제거하는 기법

원준연(Won Jun Youn),전은성(Jun Eun Sung),김동구(Kim Dong Ku) 한국통신학회 2012 한국통신학회 학술대회논문집 Vol.2012 No.2

동절기 단열갱폼으로 인한 경제성 효과 및 투입 원가 분석 연구

원준연,이영도,남경용,Won, Joon-Yuen,Lee, Young-Do,Nam, Kyung-Yong 한국건축시공학회 2018 한국건축시공학회지 Vol.18 No.4

This paper verifies the superiority of warming work in winter by applying the insulation gang-form to the apartment housing site and analyzes the economic feasibility of the application. According to the experimental results, the actual cost of warming work was about 52 million won less than planned, and 160 million won less than the existing average.(Note - The cost of gang form material increased from 260 million won to 310 million won after the change) As a result, the construction cost could be reduced by about 110 million won. As the costs of warming work can change depending on the number of floors, the building number, and the area of each site, it is deemed necessary to conduct a thorough review in advance at the site where the cost of warming work is to be applied. 본 논문은 단열갱폼의 공동주택현장 적용을 통해 단열갱폼 동절기 보양우수성을 확인하고, 현장 적용에 따른 경제적 타당성을 분석하고 있다. 실험결과에 따르면 실제 보양투입 비용은 사전계획대비 약 5천 2백만 원을 절감하였으며, 기존 일반갱폼대비 약 1억 6천만 원을 절감하였다.(참고 - 변경전 갱폼 자재비는 2억 6천만 원에서 변경 후 3억 1천만 원으로 약 5천만 원 증가함) 결과적으로 단열갱폼으로 변경하여 약 1.1억 원 가량의 공사비를 절감할 수 있었다. 현장마다 층수, 동수, 면적이 달라짐에 따라 보양공사비가 변경될 수 있으니 단열갱폼 적용 예정인 현장에서는 사전에 충분한 검토가 이루어져야 할 것으로 판단된다.

기술수용모델을 이용한 외식 O2O 서비스 특성이 고객신념에 미치는 영향 연구

원준연(Junyeon Won),강형철(Hyungchul Kang),김병용(Byeongyong Kim) 한국조리학회 2017 한국조리학회지 Vol.23 No.7

정상 고막으로 보이는 전음성 난청에서의 시험적 고실 개방술

원준연,윤태현,정종우,이광선 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.2

공동주택 하자접수 유형변화 및 특징에 관한 연구

원준연 ( Won Joon-yuen ),남경용 ( Nam Kyung-yong ) 한국건축시공학회 2021 한국건축시공학회지 Vol.21 No.4

공동주택 입주자들의 생활 수준 향상 및 고품질 기대로 인해 공동주택 하자와 관련된 민원이 매년 증가하고 있다. 그리고 이와 동시에 하자발생 유형 또한 새롭게 변화하고 있다. 이러한 유형 변화를 확인하기 위해 전국 12개 단지 100개 동(9,748세대)을 대상으로 조사하였다. 세대 당 하자 접수 건은 하자 종류의 변화 없이 10년 전보다 대략 1.6배 증가하였다. 기계설비 하자 접수 건의 경우는 10년 전보다 1.4배 증가하였지만 하자 종류의 변화가 발견되었다. 그중 일반 부분(급수, 배수, 수압 등)이 차지하는 비율이 10년 전보다 25%가량 감소하였다. 이는 실내 환경과 관련된 아이템들이 대부분의 신규 공동주택에 필수적으로 적용되어 이와 관련된 하자 종류가 늘어난 까닭이다. 공동주택에 새롭게 적용되는 특화 아이템들이 점차 확대되는 추세로 향후 이와 관련된 하자는 점차 증가할 것으로 예상된다. Due to the improved living standards and the expectation on higher-quality housing of tenements, complaints on the defects in the buildings are increasing every year. Also, the types of flaws are changing. We surveyed one hundred buildings(9,748 households) in 12 complexes across the country to investigate the shifted types. The number of defects received increased by about 1.6 times compared to 10 years ago, while the categories did not change. The report on the malfunctioning mechanical equipment has increased 1.4 times than ten years ago, and the types of the problem changed. The proportion of general parts(water supplement, drainage, water pressure) has decreased about 25% compared to 10 years ago. This is because the items related to the indoor environment become standardized in apartment housing. Therefore the problems related to those have been increased. As the specialized items applied to the tenement building are showing gradual expansion, the defect reports concerning those will also grow.

녹색쌀 생산을 위한 벼 품종들의 특성 비교

원준연,조진웅 한국작물학회 2015 Korean journal of crop science Vol.60 No.4

This research analyzed the characteristics of varieties of rice such as a harvest time and yield, and to select a proper variety to product green rice according to a conventional planting culture and a late planting culture. The most proper harvest time of rice, in general, was 15 to 25 days after heading to product the green rice. Sinsunchal among glutinous rice varieties and Chilbo among nonglutinous rice varieties showed the most amount harvest at 25 days after heading, which was a limit harvest time for the whole green rice production in overall rice varieties. The amount of green rice according to transplanting times, the May 30 th transplanting was more than the June 20 th . The yield of green rice harvested at 15~25 days after heading was varied according to varieties. Proper glutinous varieties for green rice production were Dongjinchal, Sangdongchal, Boseokchal, and Sinsunchal, in order of listed, which were transplanted at the May 30 th . Meanwhile, Boseokchal, Backokchal, and Sinsunchal, in order of listed, were proper varieties for green rice production, which were transplanted at the June 20 th . In nonglutinous rice, Samkwang, Nunbora, and Chilbo, which were transplanted at the May 30 th , were proper varieties for green rice production. Hwanggeomnodeul, Hopum, and Chilbo, which were transplanted at the June 20 th , were proper varieties for green rice production.

Olfactory and Taste Dysfunction in Patients with Asymptomatic and Mildly Symptomatic COVID-19 in Korea

원준연,허윤,김태석,김충효,이우현 대한비과학회 2021 Journal of rhinology Vol.28 No.1

Background and Objectives: The association between chemosensory dysfunction (CSD) and coronavirus disease 2019 (COVID-19) remains unclear. The aim of the present study was to determine the incidence of olfactory and taste dysfunction in asymptomatic and mildly symptomatic patients with COVID-19 and to evaluate the symptoms associated with CSD in patients with COVID-19. Materials and Method: On March 9, 2020, 309 patients with asymptomatic or mildly symptomatic COVID-19 confirmed by real-time polymerase chain reaction (RT-PCR) were admitted to the No. 7 Community Treatment Center in Korea. An internetbased survey about symptomatology was administered to these patients, with responses obtained from 244 (79.0%). Subjects who completed the survey were enrolled in this study and were categorized into either a CSD group or a normal chemosensory group based on the presence or absence of CSD, respectively. Results: General symptoms, including fever, myalgia, and chills, were most common (29.1%), followed by upper respiratory tract infection (URI) symptoms (20.9%), CSD (20.5%), and nasal symptoms (13.5%). In patients with CSD (n=50), 10 (4.1%) reported no other symptoms. After adjustment for age, sex, past medical history, and other symptoms, general symptoms [odds ratio (OR), 3.63; confidence interval (CI), 1.70-7.76] and nasal symptoms (OR, 7.00; CI, 2.61-18.80) were significantly associated with CSD. Conclusion: The incidence of CSD was relatively high (20.5%) in asymptomatic and mildly symptomatic patients with COVID-19. General symptoms were independent risk factors of CSD, suggesting a sensorineural mechanism for the observed olfactory and taste dysfunction. Background and Objectives: The association between chemosensory dysfunction (CSD) and coronavirus disease 2019 (COVID-19) remains unclear. The aim of the present study was to determine the incidence of olfactory and taste dysfunction in asymptomatic and mildly symptomatic patients with COVID-19 and to evaluate the symptoms associated with CSD in patients with COVID-19.Materials and Method: On March 9, 2020, 309 patients with asymptomatic or mildly symptomatic COVID-19 confirmed by real-time polymerase chain reaction (RT-PCR) were admitted to the No. 7 Community Treatment Center in Korea. An internet-based survey about symptomatology was administered to these patients, with responses obtained from 244 (79.0%). Subjects who completed the survey were enrolled in this study and were categorized into either a CSD group or a normal chemosensory group based on the presence or absence of CSD, respectively.Results: General symptoms, including fever, myalgia, and chills, were most common (29.1%), followed by upper respiratory tract infection (URI) symptoms (20.9%), CSD (20.5%), and nasal symptoms (13.5%). In patients with CSD (n=50), 10 (4.1%) reported no other symptoms. After adjustment for age, sex, past medical history, and other symptoms, general symptoms [odds ratio (OR), 3.63; confidence interval (CI), 1.70-7.76] and nasal symptoms (OR, 7.00; CI, 2.61-18.80) were significantly associated with CSD.Conclusion: The incidence of CSD was relatively high (20.5%) in asymptomatic and mildly symptomatic patients with COVID-19. General symptoms were independent risk factors of CSD, suggesting a sensorineural mechanism for the observed olfactory and taste dysfunction.

Age Differences in Pet Sensitization by Pet Ownership

원준연,권재우,홍승노,이우현 대한이비인후과학회 2021 Clinical and Experimental Otorhinolaryngology Vol.14 No.2

Objectives. The association between pet sensitization and pet ownership remains unclear. Therefore, we aimed to elucidate the association between pet sensitization and pet ownership by age. Methods. We retrospectively reviewed 2,883 patients who visited our allergy clinic for nasal symptoms from January 2003 to December 2014, of whom 1,957 patients with data on skin-prick tests and questionnaire responses were included and divided into adults (age >19 years) and children (age ≤19 years). The association between pet sensitization and pet ownership was evaluated in both groups. Results. Among children, dog and cat sensitization showed no associations with dog and cat ownership, respectively. However, among adults, dog sensitization was significantly associated with dog ownership (odds ratio [OR], 3.283; P<0.001), and cat sensitization with cat ownership (OR, 13.732; P<0.001). After adjustment for age, sex, familial history of allergy, sinusitis, diabetes mellitus, other pet ownership, and non-pet sensitization, significant associations remained between dog sensitization and dog ownership (adjusted OR [aOR], 3.881; P<0.001), and between cat sensitization and cat ownership (aOR, 10.804; P<0.001) among adults. Dog ownership did not show any association with allergic rhinitis, asthma, or atopic dermatitis, whereas atopic dermatitis had a significant association with cat ownership in adults (aOR, 4.840; P<0.001). Conclusion. Pet ownership in adulthood increased the risk of pet sensitization. However, pet ownership was not associated with the prevalence of atopic disorders, regardless of age, except for atopic dermatitis and cat ownership in adults.

중소기업 정책자금의 지원방식 만족도에 관한 연구

원준연 한국무역학회 2015 한국무역학회 학술대회 Vol.2015 No.5

해가림자재에 따른 인삼의 엽록소 형광 반응 및 광합성 변화

원준연,이충열,오동주,김성만 한국약용작물학회 2008 한국약용작물학회지 Vol.16 No.6

This study was conducted to investigate the influence of shading material on the chlorophyll fluorescence, photosynthesis, transpiration, stomatal conductance and its any correlations in Panax ginseng C.A.Meyer. Fo was higher in polyethylene shade net than in silver-coated shading plate, but this treatment caused a lower Fm in comparison with silver-coated shading plate. Also, Fv/Fm and PhiPS2 showed higher in silver-coated shading plate than in polyethylene shade net. The relationship between net photosynthetic rate and transpiration, stomatal conductance were increased as the PAR (Photosynthetic active radiation) was increased and reached maximum at the 200-400 μmol/m2/s of PAR in all of leaves, and the higher in silver-coated shading plate than in polyethylene shade net. A linear equation was obtained between net photosynthetic rate and transpiration, net photosynthetic rate and stomatal conductance. SPAD was higher in silver-coated shading plate than in polyethylene shade net.