푸른길 공원의 대기 환경 특성에 관한 연구

민경우,이경석,박옥현,윤관주,김도술,박세일,정원삼,이대행,조영관,Min, Kyoung-Woo,Lee, Kyoung-Soek,Park, Ok-Hyun,Yoon, Kwan-Ju,Kim, Do-Sool,Park, Se-Il,Jeung, Won-Sam,Lee, Dae-Hang,Cho, Young-Gwan 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.3

Objectives: This study aimed to survey the characteristics of air quality and meteorological conditions in a greenway park. Methods: We measured meteorological and health related factors, including noise, particulate matter ($PM_{10}$) and selected gaseous air pollutants at three locations in a greenway park and on a general roadside as comparison. The measurements were repeated four times from April to October 2014. Results: The average air temperature in the greenway park was $20.7^{\circ}C$ which was $1-2^{\circ}C$ lower than on the general roadside. The average $PM_{10}$ concentration in the greenway park was $85.0{\mu}g/m^3$, a level 2-3 times lower than that at the roadside. The noise level at the greenway site was 4.4 dB(A)- 23.0 dB(A) lower than at the roadside. The average CO, $CO_2$, $SO_2$ and NOx concentrations in the greenway park were lower than at the roadside. The average phytoncide and anions concentrations in the greenway park were higher than at the roadside. Conclusions: The urban forest of the greenway park may have some impact on air quality and meteorological conditions.

Chalcogenization-Derived Band Gap Grading in Solution-Processed CuIn_<i>x</i>Ga_1–<i>x</i>(Se,S)₂ Thin-Film Solar Cells

Park, Se Jin,Jeon, Hyo Sang,Cho, Jin Woo,Hwang, Yun Jeong,Park, Kyung Su,Shim, Hyeong Seop,Song, Jae Kyu,Cho, Yunae,Kim, Dong-Wook,Kim, Jihyun,Min, Byoung Koun American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.49

<P>Significant enhancement of solution-processed CuInxGa1-x(Se,S)(2) (CIGSSe) thin-film solar cell performance was achieved by inducing a band gap gradient in the film thickness, which was triggered by the chalcogenization process. Specifically, after the preparation of an amorphous mixed oxide film of Cu, In, and Ga by a simple paste coating method chalcogenization under Se vapor, along with the flow of dilute H2S gas, resulted in the formation of CIGSSe films with graded composition distribution: S-rich top, In- and Se-rich middle, and Ga- and S-rich bottom. This uneven compositional distribution was confirmed to lead to a band gap gradient in the film, which may also be responsible for enhancement in the open circuit voltage and reduction in photocurrent loss, thus increasing the overall efficiency. The highest power conversion efficiency of 11.7% was achieved with J(sc) of 28.3 mA/cm(2), V-oc of 601 mV, and FF of 68.6%.</P>

첫 경련이 간질 중첩증으로 발현된 소아의 특성

박석우(Seok Woo Park),장지연(Ji Yeon Chang),권영세(Young Se Kwon),홍영진(Young Jin Hong),손병관(Byong Kwan Son) 대한소아신경학회 2003 대한소아신경학회지 Vol.11 No.2

목 적 : 간질 중첩증은 신속한 치료를 요하는 신경학적 응급 질환으로 때로는 심각한 신경학적 후유증이 발생할 수 있으므로 원인 질환과 예후에 영향을 미치는 인자들에 대해 정확한 이해가 필요하다. 이에 저자들은 첫 경련이 간질 중첩증으로 발현된 소아의 원인, 임상 양상, 치료, 예후 및 신경학적 후유증의 발생 빈도의 연관 관계를 알아보고자 이 연구를 시행하였다. 방 법 : 1996년 7월부터 2002년 6월까지 인하대학교병원 소아과 및 응급실에서 첫 발작이 간질 중첩증으로 진단받은 1개월에서 5세 사이의 환아 25명을 대상으로 나이에 따른 분포, 원인 질환, 경련 형태, 지속 시간, 사용 약물, 뇌파 및 MRI의 소견, 예후를 기록지를 통하여 후향적으로 분석하였다. 결 과 : 1) 대상 환아의 남녀의 비는 2.1:1이었고 대상 환자 25명 중 남아 17명(68%), 여아 8명(32%)이었으며 연령은 20±1.6개월로 대부분 3세 이상(80%)에서 발생하였다. 2) 경련 형태는 전신 강직-간대형이 60%, 전신 강직형 16%, 부분 간대형이 16%, 부분 발작형이 8%이었다. 3) 원인 질환과 예후는 증후성인 경우가 64%였으며 특발성인 경우가 36%였다. 증후성의 경우 발열이 40%, 중추 신경계 감염이 20%, 허혈성 손상이 4%이었으며 원인 질환이 있는 경우와 그렇지 않은 경우와의 통계학적 유의성은 없었다. 4) 경련의 지속시간은 30분-1시간이 17례(68%), 1-2시간이 4례(16%), 2시간 이상이 4례(16%) 이었다. 지속 시간이 짧을수록 예후가 좋은 경향을 보였다. 5) 사용 약물은 phenobarbital, phenytoin, midazolam, valium, valproic acid이었다. 약물 한 가지로 조절된 경우 13례(52%), 두 가지로 조절된 경우 11례(44%), 세 가지로 조절 된 경우 2례(4%)이었으며 세 군간의 예후를 비교해 보았을 때 한 가지로 조절된 군이 다른 군 보다 예후가 좋은 경향으로 나타났다. 6) 뇌파는 20례에서 시행하였는데 정상 7례(35%)이었고, 13례(65%)는 비정상이었다. 비정상은 전기적인 지속경련을 보인 경우 6례(30%), 배경파 이상을 보인 경우 6례(30%), 국소적인 간질파를 보인 경우 1례(5%)이었다. MRI는 19례에서 시행하였는데 정상 소견 10례(53%), 이상 소견 9례(47%)이었다. 7) 원인이 발열인 경우에서의 예후는 정상을 보인 경우가 6례, HHE를 보인 경우가 2례, 복합 부분 발작을 보인 경우가 1례, 정신 지체를 동반한 뇌성 마비가 1례였다. 결 론 : 첫 경련이 간질 중첩증으로 발현된 소아는 대부분 3세 이하였다. 경련 시간이 1시간 이내, 한 가지 항경련제로 경련이 조절되는 경우는 예후가 좋았고, 경련 시간이 1시간 이상이거나, 여러 가지 항경련제를 사용하거나, 원인 질환이 있는 경우는 예후가 나빴다. Purpose : Status epilepticus(SE) is a pediatric and neurologic emergency associated with significant morbidity and mortality. Prompt recognition and management are needed for successful outcomes. We evaluated, clinical manifestations, treatment and prognosis of the patients whose first seizure attacks were presented as SE. Methods : According to the department of pediatrics and the emergency room in Inha University Medical Center, there were a total of 25 children between 1 month and 5 years old who were diagnosed as status epilepticus from July 1996 to June 2002. Also, their medical records were reviewed and analyzed interms of age distribution, accompaning diseases, the types and duration of convulsion, medications, EEG and MRI findings and prognosis. Results : Twenty-five cases were studied. The mean age at the time of the diagnosis was 20±1.6 months and 80% of the patients were less than 3 years old. The most common type of the status epilepticus was generalized tonic clonic seizure comprising 15 cases(60%). 64% of the patients were symptomatic: fever(40%), CNS infection(20%), ischemic injury(4%) while 36% were idiopathic. Seizure attacks were terminated within an hour in seventeen patients(68%) and they controlled by one antiepileptic drug in thirteen patients(52%). Of the 20 EEGs, abnormal findings were shown in 13 cases(65%); namely, electrical seizure(30%), abnormal background(30%), and focal epileptiform discharge(5%). Of the 19 brain MRIs, abnormal findings were shown in 9 cases(47%). Conclusion : The children whose first seizure attack were presented as SE were less than 3 years old. The prognosis is good in that most of the seizure attacks were terminated within an hour and controlled by one epileptic drug. However those seizure attacks with longer duration, multiple antiepileptic druge and underlying causeare had poor prognosis.

A Comparative Study of Nanoparticle-Ink-Based CIGSSe Thin Film Solar Cells on Different Back Contact Substrates

Se Jin Park,Jin Woo Cho,Gi Soon Park,Jae Seung Jeong,김지현,고두현,황윤정,민병권 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.3

The effect of the back contact electrode in nanoparticle-ink-based CIGSSe solar cells was investigated using different glass substrates with either a fluorine-doped SnO2 (FTO) conducting layer or a molybdenum (Mo) conducting layer. The morphologies, crystal structures, and compositional distributions of the Cu(In x Ga1– x )(S y Se1– y )2(CIGSSe) films are very similar in spite of the different back contact materials. The observed performances of the solar cell device, however, are somewhat different. The device that was fabricated on the FTO back contact substrate revealed a lower open-circuit voltage ( V oc) and fill factor (FF) than the Mo back contact substrate, resulting in lower solar cell efficiencies (6.5% for FTO and 7.4% for Mo). The differences between the behaviors are attributed to the interfacial properties between the CIGSSe film and the back contact electrode.

Correction to: Simulation of Counter-Rotating Vortex Pairs on a Triangular-Flapped Wing with Flap-Tip Free Vortex Modeling

Woo-Ram Kang,Se Hwan Park,이덕주 한국항공우주학회 2018 International Journal of Aeronautical and Space Sc Vol.19 No.4

The article “Simulation of Counter-Rotating Vortex Pairs on a Triangular-Flapped Wing with Flap-Tip Free Vortex Modeling”, written by Woo-Ram Kang, Se Hwan Park and Duck-Joo Lee, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 08 September 2018 with open access. With the author(s)’ decision to step back from Open Choice, the copyright of the article changed on 24 October 2018 to © The Korean Society for Aeronautical & Space Sciences and Springer Nature Singapore Pte Ltd. 2018 and the article is forthwith distributed under the terms of copyright. The original article has been corrected.

Effects of dietary supplementation of Pediococcus pentosaceus strains from kimchi in weaned piglet challenged with Escherichia coli and Salmonella enterica

송동철,Ji Hwan Lee,Kangheung Kim,오한진,Jae Woo An,Se Yeon Chang,조현아,Sehyun Park,Kyeongho Jeon,Yohan Yoon,유윤정,Younghyun Cho,Jin Ho Cho 한국축산학회 2023 한국축산학회지 Vol.65 No.3

Escherichia coli (E. coli) and Salmonella enterica (SE) infections in pigs are major source associated with enteric disease such as post weaning diarrhea. The aim of this study was to investigate the effects of Pediococcus pentosaceus in weaned piglets challenged with pathogen bacteria. In Experiment.1 90 weaned piglets with initial body weights of 8.53 ± 0.34 kg were assigned to 15 treatments for 2 weeks. The experiments were conducted two trials in a 2 × 5 factorial arrangement of treatments consisting of two levels of challenge (challenge and non-challenge) with E. coli and SE, respectively and five levels of probiotics (Control, Lactobacillus plantarum [LA], Pediococcus pentosaceus SMFM2016-WK1 [38W], Pediococcus acidilactici K [PK], Lactobacillus reuteri PF30 [PF30]). In Experiment.2 a total of 30 weaned pigs (initial body weight of 9.84 ± 0.85 kg) were used in 4 weeks experiment. Pigs were allocated to 5 groups in a randomized complete way with 2 pens per group and 3 pigs per pen. Supplementation of LA and 38W improved (p < 0.05) growth performance, intestinal pathogen bacteria count, fecal noxious odor and diarrhea incidence. In conclusion, supplementation of 38W strains isolated from white kimchi can act as probiotics by inhibiting E. coli and SE.

IGCC용 고온건식 탈화제의 반응속도 모사에 관한 연구

박소진,이영우,민세홍,나재익,위영호 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

고온건식 탈황공정에서 탈황제의 황화, 재생 반응은 비촉매 기고 반응이다. 이러한 비촉매 기고 반응의 수학적 모사는 실험데이터의 설명, 공정의 설계 그리고 scale-up에 있어서 매우 중요한 정보가 된다. 탈황제의 황화, 재생 반응에는 spray dryer로 제조된 zinc titanate 탈황제를 사용하였고, 변형된 미반응핵 모델식에 적용하여 각 반응의 반응속도를 해석한 결과 탈황제의 황화반응에는 화학반응 저항과 고체 상태의 확산 저항이 회합하여 전체반응속도를 지배하며, 이때 반응속도상수는 367.67cm/min 이었고 고체상태의 확산계수는 29.66cm²/min이었다. 또한 재생반응시에 는 화학반응 저항만이 전체반응의 저항으로 관여하며, 이때의 반응속도상수는 3.45x10e cm/min이었다. In the dry-type high temprature gas desulfurization process, sulfidation and regeneration reactions of desulfrrization sorbents are noncatalytic gas-solid reactions. The mathematical modeling of noncatalytic gas-solid reactions is improtant in order to interpret laboratory data and in design and scale-up. Zinc titanate sorbent to manufacture by spray dryer is used in sulfidation and regeneration reactions of desulfuization sorbents. The result which analyzes reaction rate of sulfidation reaction by applying each reactions to modified unreacted core model is that the global reaction rate is controlled by associating with chemical reaction resistance and solid state diffusion resistance. In this case,reaction rate constant is367.67e cm/min and solid state diffusion coefficient is 29.66e cm²/min Also gloval reaction rate of regeneration reaction is controlled only by chemical reaction resistance. In this case, reaction rate constant is 3.45x10e cm/min.

미니홈페이지를 통한 글쓰기 교육이 작문에 미치는 영향

박세욱,한건우,이은경,이영준 한국교원대학교교육연구원 2006 敎員敎育 Vol.22 No.4

근관치료용 전기모터의 회전 안정성 평가

박세희,서현우,홍찬의 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.4

수종의 근관치료용 전기모터들의 반복사용과 시간에 따른 회전속도의 변화를 비교하여 근관치료용 전기모터의 회전 안정성을 평가하고자 하였다. 시간에 따라 변화하는 실제회전속도 및 전압과 전류를 측정하고, Student t-test를 통한 실제회전속도와, 반복측정분석을 통한 상관관계를 비교분석 하였다. 동일 종류의 전기모터들 사이의 모든 측정 결과들은 차이를 보이지 않았다. 모든 전기모터에서 반복사용과 시간의 흐름에 따른 회전속도의 변화는 차이를 보이지 않았다. 이상의 결과로, 본 실험에 사용된 모든 전기모터는 일정한 회전속도를 유지해야 하는 회전 안정성의 조건에 충족됨을 알 수 있으며, 반복사용과 시간에 따른 신뢰성 있는 회전속도와 안정적인 전압 및 전류의 유지가 가능하리라 생각된다. The purpose of this study was to evaluate a rotational stability of endodontic electronic motors by comparing the changes of rotational speed, depending on the number of usages and with/without static load. Twelve new endodontic electronic motors were used in this study. Non contact type digital tachometer was used for measuring the rotational speed of handpiece. True RMS Multimeter was used for measuring the voltages and the electric currents. All measurements were recorded every 10 seconds during 10 minutes and repeated 9 times. Five repetition was done per each electronic motor. To statistical analysis, student t-test, repeated measures and Scheffe's post-hoc tests were performed. In the same motor group, there was no significant difference in all measurements. In all groups, there was no significant difference in the amount of rotational speed changes depending on the number of usages and with/without static load. In the limitation of this study, the results showed that all kinds of endodontic electronic motors in this study had an established rotational stability. Therefore they could be safely used in root canal treatment with areliable maintenance of rotational speed, regardless of the number of usages and with/without load.

영상분석장치를 이용한 미세흔적의 형태비교 및 특성분석에 관한 연구(Ⅲ) : 총기 발사흔 중 강선흔의 형태 비교

박성우,이정필,김동환,임세혁,김영만 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-