[논문]보육실습에서 프로젝트접근법에 대한 예비보육교사의 관심수준 변화 연구

유병민,박수홍,강문숙,박철수,정경훈 교육혁신학술위원회 2011 교육혁신연구 Vol.21 No.1

본 연구는 예비보육교사가 보육실습이라는 과정에서 프로젝트 접근법에 대한 관심은 어떠하며, 관심변화 여부를 사례중심으로 살펴보는 것을 목적으로 하였다. 이를 위하여 예비보육교사를 대상으로 보육실습 사전과 사후검사를 실시하였으며, 자세하고 구체적인 사실과 연구의 질적인 부분을 찾아보고자 인터뷰하였다. 그 결과, 첫째, 프로젝트에 대한 예비보육교사들의 관심은 전반적으로 무관심으로 나타났다. 둘째, 사전․사후검사 결과, 프로젝트 접근법에 대한 관심수준의 변화가 있었던 사례에서는 관심변화의 패턴도 다양하게 나타났으며, 관심변화가 크게 없었던 사례에서는 개인, 정보관심이 높게 나타났다. 이러한 결과는 프로젝트에 대한 예비보육교사의 관심수준은 보육환경, 보육과정, 실습지도 교사, 예비보육교사의 지각력, 프로젝트에 대한 사전지식이나 교육정도에 따라 다양하게 변할 수 있음을 알게 되었다. The purpose of this study is to analyze the case in which we can identify how the SoC of prospective child care teachers about the project approach changes and why these change appears during the child care practice when we assumpt that for prospective child care teachers to implement the project approach is that they participate in change during child care practice. In Case K, the SoC of the prospective child care teacher moves from Stage 0 awareness to Stage 2, Stage 3, Stage 4, and In Case M, the SoC moves from Stage 0 to Stage 1. In Case P, the SoC moves from Stage 1 to Stage 2, Stage 3, and in Case S, the SoC isn't changed. Above this, we identify the SoC of prospective child care teachers. Case K, M, and P changes SoC after child care practice, but Case S doesn't change. the reason why there is a difference is the mindset of prospective child care teachers. Anyone who wants to accomplish specific purposes can deal with diverse changes with flexibility, but others can easily have an effect on the changes. We suggest that instructor in organization for prospective child care teachers’ education need to have a class for prospective child care teachers to put theory into practice, give direct facilitation and intervention in the field to prospective child care teachers, make a learning environment for prospective child care teachers to make good use of teaching materials and instrument, develop guidebook for project approach and give support to prospective child care teachers.

Low-viscosity Resin System이 복합레진 수복물의 변연누출에 미치는 영향

백병주,김재곤,허선,김문현,양정숙 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.2

The purpose of this study was to evaluate and compare the effectiveness of various low-viscosty resin systems used as rebonding agents to prevent microleakage at the margins of class I composite resin restorations. Seventy sound human premolars were selected for experiment. Class I cavities were prepared and each cavity was conditioned with a 37% phosphoric acid for 15 sec, rinsed with water for 15 sec, and dried with compressed air. Bonding agent(Scotchbond Multipurpose, 3M Co.) was applied and a hybrid composite resin(Z-100, 3M Co.) was placed using an incremental technic. The excess cured composite resin was carefully removed with Sof-Lex discs(3M Co.) to expose the original margins of the cavity. The following seven groups were established: group 1 was not rebonded and used ascontrol group; group 2 was rebonded with a Scotchbond Multipurpose(3M Co.) and finished ; group 3 was rebonded with a Fortify(BISCO) AND finished ; group 4 was rebonded with a Concise white sealant(3M Co.) and finished ; group 5 was rebonded with a Concise white sealant(3M Co.) and not finished ; group 6 was rebonded with a P&F sealant(BISCO) AND finished ; group 7 was rebonded with a P&F sealant(BISCO) and not finished. The specimens were then subjected to 500 thermocycles between 5 & 65 with a 10sec dwell time and immersed in 2% methylene blue dye solution for 24 hours and sectioned with low-speed diamond cutter into two part under water condition. The extent of microleakage at rebonded margins was evaluated microscopically and scored for dye penetration according to the following scale : 0=no dye penetration ; 1=dye penetration to half-way along axial wall between enamel surface and DEJ ; 2=dye penetration beyond halfway along axial wal between enamel surface and DEJ ; 3=dye penetration to the full depth of DEJ or beyond DEJ. Selected samples were prepared for SEM observation to determine the depth of penetration of the rebonding agent into the marginal interface. The obtained results were as follow : 1. In the group 2 and 3, which is rebonded with a Scotchbond Multipurpose and Fortify, dye penetration score were decreased significantly than that of group 1(P<0.05), but group 4 and 6 were not statistically different from group 1(P>0.05). 2. There were significant differences between group 4, 6 and group 5, 7 when compared by dye penetration score(P<0.05). 3. In the SEM observation, Scotchbond Multipurpose and Fortify were penetrated within 30-40㎛ depth of the outermost surface. However, both sealants were failed to penetrate into the debonded interface.

진공예냉처리에 의한 양상치의 선도 연장

김병삼(Byeong Sam Kim),김동철(Dong Chul Kim),이세은(Se Eun Lee),남궁배(Bae Nahmgoong),최문정(Mun Jeong Choi),정문철(Mun Cheol Jeong) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.3

The improvement of distribution system and freshness prolongation of crisphead lettuce were carried out through vacuum cooling and distribution under the low temperature. Lettuce that vacuum-cooled and transported by cold storage car was shown better freshness than that distributed by conventional method when they arrived at cunsuming area And it took 10∼17 hours until their temperatures arrived at same temperatures when they were stored at 0∼15℃ cold storage room. It was cooled to 1℃ after 27 minutes with vacuum cooling apparatus. The weight loss of lettuce that vacuum cooled and transported by cold storage car was below 5% after 30 days cold storage. And ascorbic acid and chlorophyll retentions were 86% and 52%, respectively. The shelf-life of crisphead lettuce, distributed by vacuum cooling and cold storage car transportation, was 5 days at 15℃ and over 40 days at 0℃, respectively. However, when it was distributed by conventional method, it was only 3 days at 15℃ and 20 days at 0℃, respectively.

자궁근종과 기타 양성 부인과 질환에 있어서 Levonorgestrel 함유 자궁내 장치(미레나(R))의 임상적 효능성에 대한 연구

강병문 ( Kang Byeong Mun ),정의 ( Jeong Ui ),주원덕 ( Ju Won Deog ),권혜은 ( Kwon Hye Eun ),김성훈 ( Kim Seong Hun ),채희동 ( Chae Hui Dong ),김정훈 ( Kim Jeong Hun ) 대한폐경학회 2003 대한폐경학회지 Vol.9 No.2

목적 : 본 연구는 Mirena^(??)의 자궁근종 크기 및 기타 양성 부인과 질환에 미치는 치료 효과를 보기 위하여 시행되었다. 연구 방법 : 1999년 5월부터 2001년 2월까지 Mirena^(??)를 삽입한 자궁근종 환자 31명과 단순 관찰 환자 62명의 자궁근종 크기를 전향적으로 비교하였다. 또한, Mirena^(??)가 기타 양성 부인과 질환의 임상 양상에 미치는 영향을 알아보기 위하여 1999년 9월부터 2001년 12월까지 Mirena^(??)를 삽입한 99명의 환자를 대상으로 의무기록을 검토하였다. 연구 결과 : Mirena^(??)를 삽입한 군과 삽입하지 않은 군 사이에 12개월후, 자궁 전체 및 제 1, 2 자궁근종의 용적 변화는 유의한 차기아 없었다. 기타 양성 부인과 질환에서는 총 99명의 환자에서 첫 3개월부터 53.5% 여성이 월경출혈량 감소를 보였고, 무월경은 3명을 제외하고는 모두 6개월 이후에 나타났다. 삽입 12개월 후에는 월경출혈량 감소(57.1%), 또는 무월경(28.6%)을 보였다. 간헐적인 질 출혈은 첫 3개월간 약 67%의 여성에서 보고되었지만 그 빈도는 감소하여 12개월 후에는 28.6%에서 지속되었다. 결론 : Mirena^(??) 사용이 자궁이나 자궁근종의 크기에 영향을 주지 않았지만 이미 알려지 대로 월경출혈량과 월경곤란증을 감소시키는 효과가 컸다. 주 제거 이유인 질 출혈은 대부분 삽입 후 첫 6개월 내에 발생하므로 충분한 상담을 거친다면 양성 부인과 질환의 비수술적 치료로서 효과적이리라 생각된다. Objectives : This study was performed to investigate the effect of Mirena^(??) on the size of uterine myoma and clinical effect on benign gynecologic disease. Design : First, we prospectively examined 31 women with myoma who was inserted Mirena^(??) due to menorrhagia and dysfunctional uterine bleeding(DUB) from May 1999 to February 2001. The control group was 62 women with myoma without treatment. Twelve months later, we analyzed the change of volume of uterus and myoma in both groups. Second, we performed chart review of 99 women with Mirena^(??) insertion from September 1999 to December 2001. They were examined about bleeding patterns and complications and other clinical effects at 3,6,12 months after Mirena^(??) insertion. Results : There was no significant difference in the change of the volume of uterus and myoma between the study and control group. More than half of women(53.5%) experienced decrease of menstrual bleeding during first 3 months, and 12 months later, 57.1% of women experienced decrease of menstrual bleeding and 28.6% of women became amenorrhea. Intermittent vaginal bleeding or spotting was reported by most women(67%) during the first 3 months but this usually stopped within 6-12 months(28.6%). Women requiring removal of the device due to vaginal bleeding or spotting were concentrated in the first 6 months. Conclusion : There is no reducing effect of Mirena^(??) on the size of uterus and myoma but Mirena^(??) could be an effective treatment of menorrhagia, DUB, dysmenorrheal.

Application of Direct Laser Melting to Restore Damaged Steel Dies

Jeong Hwan Jang,Byeong Don Joo,Sung Min Mun,Min Young Sung,문영훈 대한금속·재료학회 2011 METALS AND MATERIALS International Vol.17 No.1

Direct laser melting (DLM) technology can be applied to restore damaged steel dies. To understand the effects of DLM process parameters such as the laser power and scan rate, a series of experiments was conducted to determine the optimal operating parameters. To investigate the laser melting characteristics, the depth/height ratio, depth/width ratio and micro-hardness as a function of the laser energy density were analyzed. Fe-Cr and Fe-Ni layers were deposited on a steel die with 11.38 J/㎟ of energy input. The wear-resistance and the friction coefficient of the deposited layer were investigated by a pin-on-disk test. The penetration depth decreased as the scan rate increased as a consequence of the shorter interaction time. The depth/height ratio of the deposited layer decreased with an increase in the scan rate. The depth/width ratio increased as laser power increased and the scan rate decreased. The deposition shape of the Fe-Ni powder was relatively shallow and wide compared with that of the Fe-Cr powder. The scan rate had a substantial effect upon the deposition height, with the Fe-Cr powder melting more than the Fe-Ni powder. The micro-hardness of the layer melted from the powders is higher than that of the substrate, and the hardness of the laser-surface-melted layer without any metal powder is higher compared to that of the metal-powder-melted layer. The direct laser melting process with Fe-Ni powder represents a superior method when restoring a steel die when the bead shape and hardness of the restored surface are important outcome considerations.

Compensation method for respiratory motion in proton treatment planning for mobile liver cancer

Jeong, Hojin,Lee, Se Byeong,Yoo, Seung Hoon,Lim, Young Kyung,Kim, Tae Hyun,Park, Seyjoon,Chai, Gyu Young,Kang, Ki Mun,Shin, Dongho John Wiley and Sons Inc. 2013 Journal of applied clinical medical physics Vol.14 No.2

<P>We evaluated the dosimetric effect of a respiration motion, and sought an effective planning strategy to compensate the motion using four‐dimensional computed tomography (4D CT) dataset of seven selected liver patients. For each patient, we constructed four different proton plans based on: (1) average (AVG) CT, (2) maximum‐intensity projection (MIP) CT, (3) AVG CT with density override of tumor volume (OVR), and (4) AVG CT with field‐specific proton margin which was determined by the range difference between AVG and MIP plans (mAVG). The overall effectiveness of each planning strategy was evaluated by calculating the cumulative dose distribution over an entire breathing cycle. We observed clear differences between AV G and MIP CT‐based plans, with significant underdosages at expiratory and inspiratory phases, respectively. Only the mAVG planning strategy was fully successful as the field‐specific proton margin applied in the planning strategy complemented both the limitations of AVG and MIP CT‐based strategies. These results demonstrated that respiration motion induced significant changes in dose distribution of 3D proton plans for mobile liver cancer and the changes can be effectively compensated by applying field‐specific proton margin to each proton field.</P><P>PACS numbers: 87.55.D; 87.53.Bn; 87.53.Jw; 87.55.dk</P>

Micropatterning of a Bipolar Plate Using Direct Laser Melting Process

Jeong-hwan Jang,Byeong-don Joo,Sung-min Mun,Young-hoon Moon 한국소성가공학회 2010 기타자료 Vol.2010 No.6

Direct laser melting (DLM) technology has been used to fabricate the micro-pattern of the bipolar plate in a direct methanol fuel cell (DMFC). A suitable approach to enhance the performance of the bipolar plate has been performed to optimize the DLM process. To fabricate the micro pattern, a DLM process with 316L stainless steel powder has been used. For the melted height of 1 mm, the DLM process conditions were optimized such as; laser power of 200W, scan rate of 36.62 mm/s and the 8-layer structures. To characterize the effect of material type, the bipolar plates of various types were analyzed. In case of the 316L stainless steel DLM patterning, a current density of 297 mA/㎠ was achieved but the case of the 316L stainless steel plate, 248 mA/㎠ current density that is lower than that of other materials was achieved. The overall cell performance of 316L stainless steel DLM patterning bipolar plate was better than that of the 316L stainless steel plate. This has significant advantages for the micropatterning using DLM process. The use of 316L stainless steel powder material as micro pattern material will reduce the machining cost as well as volume of the fuel cell stack.

Homogeneously aligned liquid crystal molecules on unidirectional buckle pattern of polyurethane films

Jeong, Hae-Chang,Won, Jonghoon,Lee, Ju Hwan,Mun, Hyo-Young,Kim, Dong Hyun,Lee, Dong Wook,Oh, Byeong-Yun,Han, Jeong-Min,Seo, Dae-Shik Informa UK (TaylorFrancis) 2018 Liquid crystals Vol.45 No.1

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Thermal and electro-optical properties of cerium-oxide-doped liquid-crystal devices

Mun, Hyo-Young,Park, Hong-Gyu,Jeong, Hae-Chang,Lee, Ju Hwan,Oh, Byeong-Yun,Seo, Dae-Shik Taylor & Francis 2017 Liquid crystals Vol.44 No.3

지방재정조정제도가 지방재정에 미친 효과분석 : 지방정부 재정지출효과를 중심으로

최병호,문병근,정종필 한국국민경제학회 1999 경제연구 Vol.8 No.1