• 한국심리학회지 : 문화 및 사회문제
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• 제28권2호
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• pp.241-272
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• 2022

본 연구의 목적은 질적 메타요약 방법론을 활용하여 국내 게이, 레즈비언, 바이섹슈얼 성소수자의 성정체성 형성 과정에 영향을 미치는 요인들을 살펴본 질적 연구들을 체계적으로 종합함으로써 이질적인 질적 연구 결과를 통합적으로 이해하는 것이다. 국내 질적 연구들을 통해 보고된 성소수자의 성정체성 형성에 영향을 미치는 요인들을 종합하여 이러한 요인들의 보편성과 특수성을 파악하는 것은 그들의 내적 경험을 이해하고, 심리적 적응을 돕는데 중요하다. 본 연구는 질적 메타요약을 통해 국내 질적 연구들이 제시한 게이, 레즈비언, 바이섹슈얼 성소수자들의 성정체성 수용과 통합, 더 나아가 긍정적 정체성 형성에 관여하는 심리적 요인과 사회적 요인을 확인하고 체계적으로 요약하고자 하였다. 먼저 학술DB 검색을 통하여 국내에서 2021년까지 발표된 총 9편의 관련 연구물을 확보하였다. 9편의 연구물의 질은 Critical Appraisal Screening Programme을 통해 평가되었다. 분석 결과, 총 179개의 진술문이 추출되었고 관련 진술문들을 축약시킨 결과 34개의 축약진술문이 산출되었다. 34개의 축약 진술문은 성정체성 발달을 저해하는 요인과 촉진하는 요인, 심리적 요인과 사회적 요인의 두 가지 축을 기준으로 크게 성정체성 발달을 촉진하는 심리적 요인과 사회적 요인, 성정체성 발달을 저해하는 심리적 요인과 사회적 요인의 네 영역으로 나눌 수 있었다 논의에서는 영역별 주요 요인을 설명하였으며, 본 연구 결과의 함의와 제한점을 제시하였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2989-2994
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• 2007

Gas hydrates are ice-like crystalline compounds that form under low temperature and elevated pressure conditions. Although hydrate formation can pose serious flow-assurance problems in the gas pipelines or facilities, gas hydrates present a novel means for natural gas storage and transportation with potential applications in a wide variety of areas. An important property of hydrates that makes them attractive for use in gas storage and transportation is their very high gas-to-solid ratio. In addition to the high gas content, gas hydrates are remarkably stable. The main barrier to development of gas hydrate technology is the lack of an effective method to mass produce gas hydrate in solid form. The first objective of this study is investigating the characteristics of gas hydrate formation related to several factors such as pressure, temperature, water-to-storage volume ratio, concentration of SDS, heat transfer and whether stirred or not respectively. And the second objective is clarifying the relation between the formation efficiency and each factor in order to find the proper way or direction to improve the formation performance.

• 한국약용작물학회지
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• 제8권2호
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• pp.123-128
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• 2000

지황 기내 식물체의 줄기 조직을 재료로 생물반응기에서 부정아 발생 과정을 통하여 기내 종묘를 생산하기 위해 본 실험을 수행하였다. 공기부양형 생물반응기가 교반형에 생물반응기의비해 신초 형성에 유리하였다. 2.5L 규모의 생물반응기에서 적절한 배양 밀도는 배지 1.5L에 시료 50g(줄기절편 90개)이었고, 이 때 공기의 주입량은 0.5 v.v.m으로 조절하는 것이 효과적이었다. 신초의 생산 효율을 높이기 위해 배지에 pH 완충제인 MES를 첨가한 결과, 생성된 신초의 수가 증가하였다. 유리화 억제제를 5g/1의 농도로 배지에 첨가하였을 경우 신초의 유리화 현상이 뚜렷하게 억제됨과 동시에 신초의 형성도 증가되었다.

• 펄프종이기술
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• 제42권3호
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• pp.7-13
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• 2010

KOptimization and control of wet-end process provide a key solution to improve paper quality and production efficiency at the same time. Wet-end of paper machine is to determine three important influencing factors of papermaking i.e., retention, drainage and formation. Good formation of paper could be made at the cost of deteriorated retention or drainage. In the same manner increase of retention aid could cause the bad formation of paper. It is very important to find a proper retention chemical which may satisfy one of three factors without the sacrifice of other two. Laboratory scale analyzing or screening chemical additives of wet-end was reported in this study based on RDA sheet molding. Different from the conventional test method, simultaneous consideration of three important wet-end properties could be made by RDA and consequently more reliable prediction of actual paper machine wet-end could be expected.

• 한국미생물·생명공학회지
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• 제13권4호
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• pp.377-382
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• 1985

이속 효모간 원형질체 융합에 의해 새로운 알콜발효 균주를 개발하기 위한 전단계로서, Arthro-bacter luteus에서 얻은 zymolyase 5,000을 세포벽 분해효소로 사용하여 전분분해 효모인 C. tropicalis, E. fibuligera 및 알콜발효 효모인 S. cerevisiae 등의 원형질체 형성조건에 대하여 검토하였다. 원형질체 형성의 최적 pH와 온도는 각각 pH 7.5와 35$^{\circ}C$였다. 또한 원형질체 형성에 대한 2-mercapto-ethanol의 효과는 50mM농도에서 가장 좋았으며 삼투압 안정제로는 0.6M KCl이 적당하였다.

• Nuclear Engineering and Technology
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• 제47권3호
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• pp.351-361
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• 2015

External reactor vessel cooling (ERVC) for in-vessel retention (IVR) has been considered one of the most useful strategies to mitigate severe accidents. However, reliability of this common idea is weakened because many studies were focused on critical heat flux whereas there were diverse uncertainties in structural behaviors as well as thermal-hydraulic phenomena. In the present study, several key factors related to molten corium behaviors and thermal characteristics were examined under multi-layered corium formation conditions. Thereafter, systematic finite element analyses and subsequent damage evaluation with varying parameters were performed on a representative reactor pressure vessel (RPV) to figure out the possibility of high temperature induced failures. From the sensitivity analyses, it was proven that the reactor cavity should be flooded up to the top of the metal layer at least for successful accomplishment of the IVR-ERVC strategy. The thermal flux due to corium formation and the relocation time were also identified as crucial parameters. Moreover, three-layered corium formation conditions led to higher maximum von Mises stress values and consequently shorter creep rupture times as well as higher damage factors of the RPV than those obtained from two-layered conditions.

• 상하수도학회지
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• 제33권3호
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• pp.225-234
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• 2019

This study is focused on effects of factors that affect the formation of THMs during chlorination in drinking water treatment. During the chlorination, chlorine consumption is increased by increasing the initial chlorine dose, the pH and the total dissolved solid (TDS) concentration. Also THMs formation is increased up to $58.82{\mu}g/L$ and $55.54{\mu}g/L$ by increasing initial chlorine concentration and increasing pH. However, concentration of chloroform is decreased by increasing TDS concentration. This is caused the cation($Na^+$) of the total dissolved solids preferentially reacts with the functional groups of the organic material which influence the trihalomethane formation. But total trihalomethane formation is increased up to $127.46{\mu}g/L$ by $Br^-$ contained in the total dissolved solids. DOC reduction was not influenced by any of the factors.

• 한국실내디자인학회논문집
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• 제27권3호
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• pp.33-40
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• 2018

As the standard for the value of modern people's life increases, hotels make efforts for the users' qualitative and mental satisfaction. As an approach to hotel space design differentiated for new experiences for travelers, a design that reflects the placeness is needed so that people can experience the local culture and historical meaning of the place. Thus, this study divides the components of placeness into physical factors, socio-cultural factors, and semantic factors. As for methods for the design expression of placeness formation, physical factors are classified as the connection to surrounding environments, center, passage, and area. Socio-cultural factors are classified as cultural experiences in the place. Semantic factors are classified as symbolism and historicity. For a case analysis in this study, overseas four-star hotels or higher, where placeness stood out are analyzed, based on the above-extracted components of placeness. As a result of the analysis, the hotels in the cases showed an aspect of expression that emphasized semantic factors despite there were differences in the detailed expression method, depending on the designers. The expression of the place that reflected locality and temporality showed the connection of time, connecting the past with the present. In the future, only the design expression based on the historical and symbolic meanings of the place will be the experience that remains in the users' memories, very precisely.

• The Journal of Advanced Prosthodontics
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• 제2권1호
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• pp.7-13
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• 2010

Although most researchers agree that platelet-rich plasma (PRP) is a good source of autogenous growth factors, its effect on bone regeneration is still controversial. The purpose of this study was to evaluate whether increasing angiogenic factors in the human PRP to enhance new bone formation through rapid angiogenesis. MATERIAL AND METHODS. In vitro, the human platelets were activated with application of shear stress, $20\;{\mu}g/ml$ collagen, 2 mM $CaCl_2$ and 10U thrombin/$1\;{\times}\;10^9$ platelets. Level of vascular endothelial growth factor (VEGF) and platelet microparticle (PMP) in the activated platelets were checked. In the animal study, human angiogenic factors-enriched PRP was tested in 28 athymic rat's cranial critical bone defects with $\beta$-TCP. Angiogenesis and osteogenesis were evaluated by laser Doppler perfusion imaging, histology, dual energy X-ray densinometry, and micro-computed tomography. RESULTS. In vitro, this human angiogenic factors-enriched PRP resulted in better cellular proliferation and osteogenic differentiation. In vivo, increasing angiogenic potential of the PRP showed significantly higher blood perfusion around the defect and enhanced new bone formation around acellular bone graft material. CONCLUSION. Angiogenic factor-enriched PRP leads to faster and more extensive new bone formation in the critical size bone defect. The results implicate that rapid angiogenesis in the initial healing period by PRP could be supposed as a way to overcome short term effect of the rapid angiogenesis.

• 지역연구
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• 제31권3호
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• pp.55-77
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• 2015

이 연구의 목적은 수도권 시군구별 입지요인이 제조업 기업들의 생애주기에 미치는 영향을 실증분석 하는 것이다. 한 기업도 가구와 마찬가지로 일련의 생애주기를 갖는다. 기업의 생애주기를 선행연구에서는 기업통계(firmography)로 정의하고 있으며, 이를 생성, 성장, 쇠퇴, 소멸의 단계로 구분하였다. 이 연구에서도 기업의 생애주기 단계를 동일하게 적용하였으며, 제조업 기업들을 대상으로 경공업과 중공업, 첨단제조업으로 구분하여 분석하였다. 수도권 시군구별 입지요인은 도시규모와 교통접근성, 사회 경제특성, 수도권 권역구분으로 구분하여 총 12개의 입지요인을 독립변수로 적용하였다. 분석결과, 경공업과 중공업, 첨단제조업 기업별로 기업의 생애주기에 미치는 유의미한 입지요인이 차이가 있었으며, 입지계수 또한 각각 다르게 나타났다. 이 연구결과는 기업유치를 통해 일자리를 늘리려는 지자체에서 신규기업의 생성뿐만 아니라 기존 기업의 성장을 도모하는 정책을 수립하는데 있어서 중요한 기초자료가 될 수 있을 것으로 기대된다.