석면함유 슬레이트 지붕 물받이 퇴적물 중 석면 섬유 함유율

임지현,한솔민,김현석,신유민,박시은,허정윤,김민영,장봉기 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2

This study attempted to determine the degree of asbestos release from the aging slate roof by comparing the asbestos content in the slate roof rain gutter with a colored steel plate (tin plate) over the slate roof. Four slate roof houses located in Haengmok-ri, Asan-si, Chungcheongnam-do, and one house constructed with a colored steel plate on the slate roof were selected to collect the sediment of the roof rain gutter. The asbestos fiber content was calculated by a point counting method using a polarization microscope after pretreatment with conversion treatment and hydrochloric acid treatment. The average asbestos content of the four slate roof rain gutter were 1.89%. However, asbestos was not detected in the Slate covering roof rain gutter, which were constructed on the slate roof. Asbestos fiber content was the highest at 2.89% in the slate roof rain gutter installed in 1976, followed by 2.44% in 1953. From the above results, it is necessary to minimize secondary damage as asbestos fibers released from slate roof houses to the surrounding atmosphere or leaked from slate roofs as rainwater may cause soil pollution and seriously affect residents' health. Although covering with colored steel plates (tin plates) has been shown to prevent the leakage of asbestos fibers to some extent, it is believed that a policy alternative to remove the slate roof as soon as possible is needed to solve the fundamental problem.

Lead-free (K,Na)NbO3 Thick Films for Flexible Non-volatile Memory Applications

Kwak Yeong Min,Lee Tae Kwon,Kong Dae Sol,Ko Young Joon,Jeong Dong Geun,Jung Jong Hoon 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.9

We report the sol-gel fabrication and electrical characterization of flexible (K,Na)NbO3 (KNN) thick films. Muscovite mica allows the growth of high-quality polycrystalline KNN thick films with flexible functionality. Because of the trade-off between increase of grain-size and volatilization of alkaline ions, the electrical polarization is optimized at certain temperature of 720 °C. The remnant and saturation polarization of flexible KNN films were recorded to Pr=10.3 μC/cm2 and Ps = 23.3 μC/cm2, respectively, which are quite close to those of rigid films with the same chemical compositions. The KNN thick films are bendable even up to bending radius of R = 3.1 mm, and the Pr and Ps at bending states are almost the same as compared to those at unbending state. Even in the convex and concave bending, the KNN thick films show excellent non-volatile memory characteristics. The Pr is almost the same even after the 108 times of switching and the 104 sec of retention.

제 7차 초등학교 수학 교육과정 내용 체계 분석 : Focusing on the Continuity, Sequence, and Integration of Mathematical Content

서경혜,유솔아,정진영 한국초등교육학회 2003 초등교육연구 Vol.16 No.2

교육과정 개정 때마다 수학 내용의 적정화가 중점 사항으로 제시되어 왔음에도 수학 내용의 양과 수준의 문제는 여전히 쟁점으로 남아있다. 이는 수학 내용의 적정화 문제를 내용의 양을 축소하고 수준을 하향 조정하는 기존의 방식으로 해결할 수 없음을 보여준다. 본 연구는 수학 내용의 적정화 문제를 내용 조직의 관점에서 접근해야 한다는 가정 하에 제 7차 초등학교 수학 교육과정의 수학 내용 조직에 관한 분석을 목적으로 하였다. 내용 조직에 대한 분석은 연속성, 계열성, 통합성의 원리에 근거하였다. 분석 결과 현행 초등학교 수학 교육과정의 내용 조직은 일회성, 단절성, 배타성의 특징을 띠고 있는 것으로 나타났다. 주요 수학내용이 대체로 한번 가르쳐지고 마는 편이었으며 현재 다루어지고 있는 내용이 전에 가르쳤던 내용과 그리고 앞으로 소개될 내용과 어떻게 연결되는지 내용의 위계를 찾기 어려운 경우가 많았다. 또한 여러 내용 영역들이 통합적으로 조작되어 내용 체계를 이루기보다는 서로 배타적으로 병립하고 있는 경향을 보였다. 수학 내용의 적정화를 위해서 수학 내용을 엄선하는 것 뿐 아니라 선정된 내용을 연속성, 계열성, 통합성의 원리에 근거하여 체계적으로 조직하는 작업이 요구된다. The present study examined the Korean elementary school mathematics curriculum focusing on the organization of mathematical content. The result showed a lack of continuity, sequence, and integration of mathematical content. Mathematical concepts and skills are usually introduced once with little relation to previously taught concepts and skills. In addition, six content domains - numbers and operations, geometry, measurement, patterns and functions, probability and statistics, and symbols - tend to be mutually exclusive, showing students little connections among six domains. Therefore, the present study suggests that important mathematical concepts are extended and deepened throughout the elementary school years so that students are provided with ample time and opportunities to learn important mathematical concepts and skills. Further, mathematical content domains need to be closely related and so important mathematical concepts are taught in several content domains from various perspectives. In doing so, the curriculum can help students develop an in-depth understanding of important mathematical concepts.

고대산 북서사면(경기도 연천군) 지역의 식물상 및 산림군락 분류에 관한 연구

김남영,김흥식,김영설,김정유,박완근 江原大學校 森林科學硏究所 2004 Journal of Forest Science Vol.20 No.-

2003년 3월부터 10월까지 고대산을 대상으로 식물상과 산림군락을 조사하였다. 관속식물은 94과 299속 481종 1아종 66변종 4품종 1교잡종으로 총 553종류인 것으로 나타났으며, 한국특산식물은 8과 11속 13종 총 13종류, 희귀 및 멸종위기식물은 12과 15속 15속 15종 총 15종류, 귀화식물은 9과 15속 17종 총 17종류로 나타났다. 산림군락은 신갈나무-철쭉군목, 신갈나무-생강나무군단, 갈참나무-신갈나무군락, 굴참나무-신갈나무군락, 당단풍-신갈나무군락으로 전체 1군목, 1군단, 3군락이 분포하는 것으로 나타났다. The study was carried out to investigate the flora and community classification of forest vegetation in Mt. Godae from March to October, 2003. As a result of that, the vascular plants were 94 families, 299 genera, 481 species, 1 subspecies, 66 varieties, 4 formae, 1 hybrid, 553 taxa in all; korean endemic plants were 8 families, 11 genera, 13 species, 13 taxa in all; rare or endangered plants were 12 families, 15 genera, 15 species, 15 taxa in all; naturalized plants were 9 families, 15 genera, 17 species, 17 taxa in all. forest vegetation was classified into 1 order, 1 alliance, 3 communities; Rhododendro - Quercetalia mongolicae (Kim 1990) Lindero - Quercion mongolicae (Kim 1990) A. Fraxinus rhynchophylla - Quercus mongolica Community B. Quercus variabilis - Quercus mongolica Community C. Acer pseudo-sieboldianum - Quercus mongolica Community

경사진 트레드밀에서 후방보행운동을 통한 넙다리네갈래근 강화와 요통의 관계

박주완,김경,김형욱,김재우,배솔희,서정표,이정구,정하영 대구대학교 특수교육재활과학연구소 2010 再活科學硏究 Vol.28 No.1

목적: 본 연구에서는 경사진 트레드밀에서의 후방 보행 훈련을 통한 넙다리네갈래근의 강화가 요통 환자의 치료에 미치는 영향을 알아보고자 하였다. 대상: 만성 요통을 호소하는 16명의 환자를 대상으로 연구를 실시 하였다. 방법: 트레드밀을 10° 경사로 맞춰놓은 상태에서 대상자들은 하루 20분, 일주일에 3회의 빈도로 2주 동안 훈련을 하였다. 표면 근전도를 가지고 넓다리 곧은근, 안쪽 넓은근, 가쪽 넓은근, 척추 세움근의 %MVIC를 측정하였고, KODI와 VAS를 통해 대상자들의 통증정도를 측정하였다. 결과: 넓다리 곧은근은 훈련전에 비해 훈련을 하고 난 후 상대적으로 높은 근전도를 보였고, 통계적으로 유의하였다(p<.05). 안쪽 넓은근과 가쪽 넓은근 또한 높은 근전도율을 보였지만 통계적으로 유의하지는 않았다. 척추 세움근은 훈련전에 비해 훈련을 하고 난 후 높은 근전도율을 보여주었고, 통계적으로 유의하였다(p<.05). VAS와 KODI의 평균값은 명백하게 감소되었고, 통계적으로 유의하였다(p<.05). 결론: 이상의 결론을 종합하면, 후방보행을 통한 넙다리네갈래근의 강화는 요통의 감소에 효과적이라고 사료되며, 더불어 넙다리네갈래근으로 접근하여 요통을 경감하는 중재방법이 효과적인 치료 방법이 될 수 있다는 것을 의미한다. Purpose: This study was to investigate the influence of strengthening the Quadriceps femoris through backward walking treadmill training in the patients who have lower back pain. Subjects: Sixteen subjects with chronic lower back pain were included. Method: In the training, the treadmill was set to have a inclination of 10 degrees, and the subjects were trained for 20 minutes a day, 3 times a week, for 2 weeks. %MVIC(muscle power) of rectus femoris, vastus medialis oblique, vastus lateralis and erctor spinae were measured with surface EMG, and KODI and VAS were used to measure the subject's level of pain. Results: Quadriceps femoris showed relatively higher average electromyogram rates than that before training(p<.05). Vastus medialis oblique and vastus lateralis also showed higher average electromyogram rates, but no significant change in them was noted. Erector spinae showed higher average electromyogram rates than that before training(p<.05). The average points of VAS and KODI clearly decreased(p<.05). Conclusion: Strengthening Quadriceps femoris seems to be efficient for relieving lower back pain in this study.

Production of soybean transgenic plants to improve agronomic traits

Yoon Jeong Lee,Jin Ho Yang,Jin Sol Park,Hye Jeong Kim,Hyun Suk Cho,Jae Seong Kim,Hyun Hee Im,Ki Jung Lee,Jeong Il Kim,Soon Chun Jeong,Dong Hee Lee,Yung Soo Chung 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

Soybean is a crop of importance economically and nutritionally in many parts of the world. Thanks to many new genes brought from genomic research, It is possible to introduce various candidate genes through genetic transformation to see the performance of the genes in field. In our lab, soybean transformations have been tried for last 10 years to probe the possibility of traits improvement by transformation of new gene into soybean. For this purpose, three different genes were transformed into Korean soybean variety, Kwangan. First, the gene that controls early flowering of plant was transformed into Kwangan. Second, a candidate gene for soybean mosaic virus (SMV) resistance was transformed to produce transgenic plants. Third, another candidate gene for drought tolerance was transformed. All the transgenic plants from three genes transformation were produced for their gene insertion and their expression using PCR, qRT-PCR. Further analysis including harvesting seeds is currently undertaken.

전북지역 오리 써코바이러스 감염률 및 유전자 분석

정한솔 ( Han-sol Jeong ),백귀정 ( Kui-jeong Baek ),고원석 ( Won-seok Koh ),이정원 ( Jeong-won Lee ) 한국동물위생학회 2016 韓國家畜衛生學會誌 Vol.39 No.1

Duck circovirus (DuCV) has been recognized as a contagious immunosuppressive virus affecting many duck species worldwide. To determine the prevalence of DuCV infection in ducks, we investigated 104 samples collected from 50 duck farms in Jeonbuk province with the polymerase chain reaction (PCR). Among collected samples, 40 (38.5%) were positive for DuCV. The prevalence of DuCV PCR-positive samples increased with age. Genomic sequences of 15 DuCV strains were determined and compared with previously available DuCV sequences in public databases. Phylogenetic analysis revealed that all strains were clustered into DuCV-1 group.

전북지역 조류아데노바이러스 및 닭전염성빈혈 감염률 조사

정한솔 ( Han-sol Jeong ),백귀정 ( Kui-jeong Baek ),고원석 ( Won-seok Koh ),이정원 ( Jeong-won Lee ) 한국동물위생학회(구 한국가축위생학회) 2018 韓國家畜衛生學會誌 Vol.41 No.1

Fowl adenovirus (FAdV) and chicken anemia virus (CAV) have gained much importance as an immunosuppressive and economically important emerging pathogen of poultry. This study was carried out to investigate the prevalence of FAdV and CAV infection in chickens. The groups were divided into Korean native chickens, broiler, layer hens and broiler breeder and set up groups according to age. As results, 12.5% of the native chicken, 2.5% of broiler and 6.7% of layer chicken were positive, respectively by PCR for FAdV. Serological test showed that 84.8%, 79.0%, 97.7% and 96.1% of chickens were positive for antibody to FAdV in native chickens, broiler, layer hens and broiler breeder. The prevalence of CAV infection were 20.0%, 7.5%, 16.7% and 10.0%, based on CAV gene detection by PCR. In serological test of CAV, 40.6%, 35.9%, 84.8% and 73.9% of chickens were positive in that groups.

K-EDU MON CENTER CI 개발

정가람솔(Ga-Ram-Sol Jeong),박현진(Hyeon-Jin Park),정우람솔(Wooramsol Jeong),정희정(Hee-Jeong Jeong) 한국공공디자인학회 2023 공공디자인연구 Vol.9 No.-

세계적으로 불균형적 인구구조가 가속화되고 있는 시점에서 정부는 인력 부족을 해결하고 국가 성장 동력을 확보하기 위한 다양한 정책들을 실행하고 있다. 이러한 배경 하에 개발된 몽골의 비전문 취업근로자 한국 체류 자격을 위한 글로벌 로컬 교육 프로그램 ‘K-EDU MON CENTER’의 CI(Corporate Identity, 이하 CI)를 디자인, 개발하였다. CI이론, ‘K-EDU MON CENTER’의 현황, 유사 CI/BI 개발 사례 분석을 통해 디자인 개발의 프로세스를 구축하였으며 사용자에게 특정한 인상과 인식을 제공하고 조직의 목표와 가치를 반영한 CI 베이직시스템과 응용시스템을 개발하였다. 통합된 이미지 구축을 통해 개발된 CI를 사용자 커뮤니케이션과 다양한 마케팅에 활용할 수 있게 되었다. The world's disproportionate population structure is accelerating. As a result, the government is implementing various policies to ease the shortage of human resources and improve national growth engines. We designed the CI(Corporate Identity) of K-EDUMON CENTER, a global local education program for Mongolian non-professional workers to qualify for stay in Korea. We have established a design development process through CI theory analysis, current status of “K-EDUMONNTER”, and similar CI/BI development cases. We have developed CI basic systems and applications that provide users with specific impressions and perceptions and reflect organizational goals and values. Integrated image building enables the developed CI to be utilized for user communication and various marketing activities.

Urethral diverticulum in pregnancy: rare case report and brief literature review

( Jeong So-yeon ),( Oh Da-sol ),( Kim Jeong-sook ),( Lee Sang-hun ),( Ahn Jun-woo ),( Lee Soo-jeong ),( Roh Hyun-jin ) 대한산부인과학회 2022 대한산부인과학회 학술대회 Vol.108 No.-

Background> A female urethral diverticulum (UD) is an evagination of urethral mucosa, pushing into the connective tissue layers that surround urethra. Several symptoms such as dysuria and dyspareunia are reported, but asymptotic in a few cases. Prevalence of UD in women of reproductive age is 0.6-6% among which UD in pregnant women is regarded as the most rarest. No clear guideline of managing UD except for common conservative approach has yet been established. Case presentation> A 39-years old, (IVF-ET after myomectomy, Primigravida, 34+0 gestational weeks [GW]) pregnant woman who presented about 6-cm septate cystic mass in vaginal canal with no urinary and vaginal symptom was transferred from a local clinic. TV-USG revealed that multiple cystic mass was 5.5 cm x 4.9 cm in size, which was confirmed as UD by pelvic MRI. The patient was admitted due to preterm labor. Cesarean section was conducted at 36+5 GW, and a healthy male baby with 2,890 g in weight was born. APGAR score was 10-10. UD was still observed in the patient two months after the delivery. Periurethral diverticulectomy followed by pathological analysis concluded that the patient had UD with chronic inflammation and edema. Conclusions> The previous reports and our case suggest that UD can occur during pregnancy even though rarest. MRI is suitable for clear diagnosis of UD. Vaginal delivery is usually possible for pregnant women with small UD. A few cases suggested vaginal delivery after aspiration of UD, considering its size. However, a case reported that pus at the aspirated site occurred after the aspiration. Therefore, diverticulectomy after the delivery is recommended.