경춘선 숲길 이용 만족도에 영향을 미치는 요인 분석 연구 - 공원의 안전성, 접근성, 쾌적성 중심으로 -

박세연(Park, Se-Yeon),황성은(Hwang, Sung Eun),최병윤(Choi, Byeong-Yun),강부성(Kang, Boo-Seong) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.2

The purpose of this study was to analyze the factors affecting satisfaction of the park by selecting Gyeongchun Line Forest Park as the target site to relieve the inconvenience of people using a park. As the number of park users increased after COVID-19, complaints about using the park also increased. Through the survery the factors affecting satisfaction were identified by dividing them into categories of saftey, accessibility, and comfort and do an on-site investigation. In order to increase the safisfaction of the park, lighting and visual connection were important in terms of saftey, accessibility and guidance width and movement speed were importatnt in comfort.

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>

포항산 천연 제올라이트와 합성 제올라이트에 의한 금속 이온의 제거

박상윤,장세복,김덕수,김양 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

국내 경상북도 포항시 남구에서 채취한 4종의 천연 제올라이트를 화학성분 분석, X-선 회절, 열시차분석 실험, 열중량분석 실험으로 분석하였다. 이들 제올라이트의 주성분은 석영, mordenite, heulandite가 함유된 clinoptilolite이었다. NaOH, Ca(OH)₂, HCI 용액으로 처리한 천연 제올라이트의 성질은 X-선 회절법과 열시차분석 실험법으로 연구하였다. 천연 제올라이트와 화학적으로 처리한 제올라이트, 합성 제올라이트를 이용하여 Cu²+, Cd²+, Hg²+, Pb²+, Cr6+등의 중금속 이온과 알칼리 금속 K- 이온의 제거능력을 비교하였고, 중금속 이온 용액의 pH값과 초기농도, 중금속 이온을 제거하는데 소요되는 반응 시간의 효과 등을 비교하였다. 천연 제올라이트에 Ca²+, Pb²+, and Cu²+ 이온용액을 각각 5ppm첨가한 결과 제거율이 94%, 95%, 97%까지 증가되었다. 또한 0.5N NaOH와 0.5 N HCI 용액으로 처리한 매석산 천연 제올라이트를 이용하여 Hg²+ 이온용액을 5ppm 첨가한 결과 제거율이 약 80% 정도였다. 매석산 천연 제올라이트와 합성 제올라이트 A,X 및 Y가 Hg²+ 이온의 최대 제거율을 나타내었다. The four natural zeolites collected in Pohang, Kyungsang buk-do, Korea, were analyzed by means of wet chemical methods, X-ray diffraction, DTA, and TGA. The results indicate that the primary species of those zeolites are clinoptilolite mixed with quartz, mordenite, and heulandite. These zeolites were treated with NaOH, Ca(OH)₂, and HCI solution and their differences were also studied by X-ray diffraction method and differential thermal analysis method. The capabilities of removing heavy metal ions, such as Cu²+, Cd²+, Hg²+, Pb²+ and Cr6+, and alkaline ion, K+ ions with original zeolites, chemically treated zeolites, and synthetic zeolites were compared. The effect of pH value of solution and initial concentration of heavy metal ions, and the effect of reaction time in removing heavy metal ions were ions were studied. The experimental results showed that up to 94%, 95%, and 97% of Ca²+, Pb²+, and Cu²+ ions could be removed, respectively, out of 5 ppm of untreated natural zeolites. About 80% of the Hg²+ ions could be also removed out of 5 ppm Hg²+ ions solution with Maesuk mt. natural zeolite which was treated with 0.5N NaOH and 0.5 N HCI solution. It was found that Maesuk mt. natrual zeolite was most efficient in removing Hg²+ ions compared with the other natural zeolites studied in this work and synthetic zeolite A, X and Y.

정맥주입 전문간호사가 삽입한 말초삽입형 중심정맥관(PICC) 사용 결과에 대한 후향적 분석

박정윤,박광옥,백미경,김세라,권혜리,양수진 대한기초간호자연과학회 2004 Journal of korean biological nursing science Vol.6 No.1

Background : Intravenous(Ⅳ) access is becoming an increasingly important part of health care today. The current drive for clinical effectiveness and cost-effective health care serves to increase the need for reliable vascular access. Venous access devices were developed to overcome problems associated with limited peripheral access and frequent venipuncture in patients with long-term therapy. Although the peripherally inserted central catheter(PICC) have become popular during recent years in USA, its procedure is rare in Korea. Purpose : The goal of this study was to analyze the PICC inserted patient data by Ⅳ CNS intervention. Method : A Total of 62 PICCs were inserted into 51 patients by the Ⅳ CNS during a 10-month period form November, 14, 2002, to October 2, 2W2. Data was obtained retrospectively through chart review. Result : The patient population included 34(54.8%) men and 28(45.2%) women, with a mean age 50.6 years. The main indication for PICC placement was to access vein in poor peripheral venous status(40.3%). The mean served interval for PICC insertions was 16.7 days(range, 2~61 days). The reasons for removal were completed therapy in 18 cases(29.0%), patient death in 13 cases(21.0%), and mechanical or functional PICC problem in 10cases(16.1%). The three PICCs removed for presumed infection, and one had only positive tip cultures(0.2%). Conclusion : PICCs are rapidly growing popularity and required an extended course of Ⅳ therapy.

경부에 발생한 2새열낭종 2례

박홍주,박세찬,손영휘,윤천주,유선열 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.4

Developmental anomalies arising from the branchial apparatus include cysts, external sinuses, internal sinuses, and complete fistulas. Second branchial cleft cysts are by far the most common among these anomalies. It may occur at any age, being most common in the third decade, and more frequent in the male than in the female. It usually presents a smooth, round, nontender fluctuant mass located between the level of the tragus and the clavicle along the anteromedial border of the sternocleidomastoid muscle. It is lined by respiratory or squamous epithelium unless inflammation is present. The considerable amount of lymphoid tissue may be found beneath the epithelium. The treatment of choice of branchial cleft cyst is surgical excision. If the lesion is acutely infected, however, it is essential to relieve the infection prior to the surgery This report deals with two cases of second branchial cleft cyst. In case 1, the cyst had rapidly increased in size over pregnant period. In case 2, the patient presented the swelling in the left neck, and had the history of incision and drainage because of misdiagnosis as submandibular space abscess. The infection was treated by antibiotic therapy in the first place, and then complete surgical excision was made. There was no evidence of any recurrence or complications for these 3∼4 years.

現行高校化學敎育의 問題点과 改善方案에 關한 硏究

朴成祿,韓麟傳,尹世重 공주대학교 사범대학 과학교육연구소 1973 과학교육연구 Vol.5 No.1

This paper was dealed with current status of chemistry education presented by fiftythree high school teachers with questions(1971). The questions are analyzed, summerized, and some comments are postscripted. There were many difficulties in teaching chemistry; heavy teaching load, extra official load, poor budgget, shortage of facilitsies and equipments, unreasonable use of appointed budgget in management, and too heavy burden for entrance examination which is apt to demand memory rather than understanding the natural principle and law. As a plan of improvement of current science education, the matters of policy and the matters of reunderstanding of science education on the bases of philosophy are proposed.

ATD automatic bridge remover를 이용한 새로운 포스트 제거 방법

박윤우,박세희,신혜진,조경모,김진우 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.3

포스트가 축조된 치아를 재근관 치료하는 경우 성공적인 비외과적 재근관치료를 시행하기 위해서는 포스트 제거가 선행되어야 한다. 기존의 포스트를 제거하는 방법으로는 초음파기구, Ruddle post removal system, Eaggler post remover, Masserann kit을 이용하는 방법 등 여러 가지가 소개 되고 있으나 기존의 방법들은 각 기구에 맞게 코어를 삭제해야 하는 시간과 많은 노력이 요구되며 포스트 제거시 치아나 포스트의 파절이 유발되기도 한다 그러나 최근에는 기존의 방법과는 다른 ATD automatic bridge remover를 이용해 포스트를 제거하는 새로운 방법이 소개되고 있으며 코어에 구멍을 형성하는 시간만 소요되어 비교적 빨리 제거 할 수 있다는 장점을 가지고 있다. 따라서 본 증례에서는 ATD automatic bridge remover를 이용해 주조포스트를 제거하고 성공적으로 재근관치료를 시행한 증례에 대해서 보고하고자 한다. It is common for clinicians to encounter endodontically tl·treated teeth that contain posts within their roots. If endodontic treatment is failed, these posts must be removed to facilitate successful nonsurgical retreatment. There have been many techniques such as ultrasonic instrument, Ruddle post removal system, Eggler post remover and Masserann kit developed to facilitate removal of posts from the root canal space. But these methods may be disadvantageous because long length of time required for post removal and fracture of post or teeth. In now days new post removal technique using ATD automatic bridge remover was introduced. Advantages of this method are simple and short time consuming compare to others. This article served as a successful case report of post removal using ATD automatic bridge remover.

특수 언어발달 장애 환아의 임상 및음향음성학적 특성연구

김연희,박세훈,신용일,김찬양,김현기,김정수 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.1

나지(裸地)에서 벌개미취 생장에 미치는 재식거리의 영향

신세균,박재호,전종옥,윤태,윤종선 韓國植物ㆍ人間ㆍ環境學會 2001 인간식물환경학회지 Vol.4 No.3

The Primary goal of this research is to verify the usefulness of Aster Koraiensis as a garden plant and to figure out the appropriate planting space which would bring the most effective results in terms of scenery and cost. For these purpose, we gathered the saplings of the wild grown Aster koraiensis in August and maintained them for winter. The following spring, we planted them in flat bare land with 3 different panting spaces of 50 x 50Cm, 40x30Cm, 30x30Cm. 2nd years after planting, we observed and compared the 3 different columns on the status of growth, number and size of leaves and conditions of flowering. The results are as follows : The number of leaves, stalks and roots of individual plants were increased by the wider planting density. But the ratio of leaf area per unit area appeared to be the highest in the 40X30cm sector which showed 366.9%, while the 50x50cm column showed 294.1% and 360.4% in the 30X30cm column. As for the conditions of flowering, such as the size of flowers, the number of petals per blossom and the length of flowerstalks, the best results were observed in the 50x50cm column. On the other hand, the 40x30cm column yielded the largest number of blossoms per unit area. On the basis of these results, we could induce that the 30x30cm column had already passed the peak point for the best scenery within 2 years after planting, while the 50x50cm column had not yet reached the peak point. Naturally, this leads to the conclusion that the 40x40cm planting space could be most effective when we assume the peak period for scenery to be 2nd years after planting. According to our investigation, the blooming period of Aster Koraiensis in the central region of the Korean peninsular lasts about 70 days from 15th June to 25th August. And the peak blooming time is 30 days from 5th July to 5th August. On the basis of these findings, we can reach the final conclusion that Aster Koraiensis has many merits and is useful as ornamental flavor of garden.

Effect of Molybdenum Thin Films with Different Density in Cu(InGa)Se<SUB>2</SUB> Solar Cells

Yunae Cho,Jae Ho Yun,Young-Joo Eo,Kihwan Kim,Soomin Song,Eunseok Cha,Ara Cho,Joo Hyung Park,Se Jin Ahn,Jin Su Yoo,Seung Kyu Ahn,Jun Sik Cho,Jihye Gwak 한국신재생에너지학회 2017 한국신재생에너지학회 학술대회논문집 Vol.2017 No.9