• 한국어류학회지
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• 제32권4호
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• pp.232-238
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• 2020

본 연구는 실내외 양식방법에 따른 미꾸라지 양식장 모니터링과 성장특성을 조사하여 국내 미꾸라지 양식산업에 대한 기초자료를 확보하고자 수행하였다. 조사는 2017년 8월부터 2019년 10월까지 실내 양식장 1개소 (D-site), 실외양식장 2개소 (P1-site, P2-site)를 선정하여 수행하였다. 성장도 측정결과를 토대로 WG (weight gain), DWG (daily weight gain), and SWG (specific weight gain) 분석한 결과 D-site에서는 175.27±36.2%, 7.98±3.3%, 0.94±0.2%, P1-site에서 320±34%, 4.07±0.6%, 0.55±0.1%, P2-site에서 295.9±53%, 4.15±0.5%, 0.62±0.1%로 나타났다. WG는 실외노지 양식장(P1-Site과 P2-site)에서 높았지만 DWG와 SWG는 실내양식장(D-site)에서 높게 나타났다. 본 조사 결과의 차이는 실내외 양식방법에 따른 성장도, 수질환경, 출하시기 및 횟수 차이로 인한 것으로 판단된다. 특히 실외 양식은 출하시기까지 1년 이상 소요되었으나 실내 양식은 1년에 3회의 출하가 가능한 것으로 나타났다.

• 디지털융복합연구
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• 제11권4호
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• pp.147-152
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• 2013

이제 성형외과는 미용 산업이 되고 있다. 성형 산업을 이해하기 위하여 성형외과 웹 사이트의 특성을 연구하였다. 2010년에 많은 사람이 방문한 33개의 성형외과 웹 사이트를 60개의 비교 대상 성형외과 웹 사이트와 비교하였다. 34개의 객관적인 웹 사이트 속성을 선정하여 93개 성형외과 웹 사이트를 조사하여 데이터를 수집하였다. 분석방법은 다중 판별분석을 사용하여 다(多) 방문 웹 사이트들과 비교 대상 웹 사이트들을 구분하는 웹 속성이 무엇인지 찾았다. 연구 결과, 두 집단을 구분하는 웹 속성은 유지보수 관련 속성과 커뮤니티 관련 속성이었다. 성형외과의 다(多) 방문 웹 사이트는 커뮤니티 중심이며, 지속적으로 유지 관리하는 사이트 임을 확인하였다. 이러한 결과는 성형외과 웹사이트의 효과적인 구축 및 운영에 도움이 될 것으로 기대된다.

• 한국직업건강간호학회지
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• 제15권2호
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• pp.94-103
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• 2006

Purpose: This study was to understand foreign workers' experiences exposed hazard chemical materials in korean industry. Method: The research subjects were 92 foreign workers worked in seoul, namyangju, ansan, suwon, pocheon, incheon, jincheon, and daejeon. It was that grounded theory method as qualitative approach was applied with in-depth interview, recording and dictation, and collected data was analysed line-by-line by research teams. The analysis process of in depth interview data was three phase. Results: The first phase was that find out meaningful data and confronted data for meaningful data was 53 meaningful items. The second phase was coding process of meaningful data, total coding items were 9, difficulty of new environment, existence of health hazard factors originated in work, performance of basic health management, management of hazard materials in work-site, self care of hazard materials in work-site, discrimination of disaster-compensation originated in work, perception of work stress, motivation of leaving position, satisfaction for present life. The third phase was 5 adaptation process, copying phase for new environment, management phase for health hazard factors, health change phase, life change phase, illegal stay phase. Conclusion: In summary, as a results it was concluded that foreign workers was experienced new environment and then has various problems in working site. But these evidences were not different from korean workers basically, undoubtedly reality of a korean small and medium enterprise. And foreign workers with long time stay have had many health problems probably, but they have want to long stay and so reach an unexpected result, illegal long stay. Therefore, we should make efforts for adequate foreign workers' health management at work-site and overall life in governmental and industrial nursing level.

• 한국BIM학회 논문집
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• 제10권4호
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• pp.32-39
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• 2020

In recent years, the construction industry is getting bigger and more complex, so it is becoming difficult to acquire point cloud data for construction equipments and workers. Point cloud data is measured using a drone and MMS(Mobile Mapping System), and the collected point cloud data is used to create a 3D digital map. In particular, the construction site is located at outdoors and there are many irregular terrains, making it difficult to collect point cloud data. For these reasons, adopting a noise reduction algorithm suitable for the characteristics of the construction industry can affect the improvement of the analysis accuracy of digital maps. This is related to various environments and variables of the construction site. Therefore, this study reviewed and analyzed the existing research and techniques on the noise reduction algorithm. And based on the results of literature review, performance evaluation of major noise reduction algorithms was conducted for digital maps of construction sites. As a result of the performance evaluation in this study, the voxel grid algorithm showed relatively less execution time than the statistical outlier removal algorithm. In addition, analysis results in slope, space, and earth walls of the construction site digital map showed that the voxel grid algorithm was relatively superior to the statistical outlier removal algorithm and that the noise removal performance of voxel grid algorithm was superior and the object preservation ability was also superior. In the future, based on the results reviewed through the performance evaluation of the noise reduction algorithm of this study, we will develop a noise reduction algorithm for 3D point cloud data that reflects the characteristics of the construction site.

• Journal of Microbiology and Biotechnology
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• 제34권8호
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• pp.1660-1670
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• 2024

The aim of this study was to modify phytase YiAPPA via protein surficial residue mutation to obtain phytase mutants with improved thermostability and activity, enhancing its application potential in the food industry. First, homology modeling of YiAPPA was performed. By adopting the strategy of protein surficial residue mutation, the lysine (Lys) and glycine (Gly) residues on the protein surface were selected for site-directed mutagenesis to construct single-site mutants. Thermostability screening was performed to obtain mutants (K189R and K216R) with significantly elevated thermostability. The combined mutant K189R/K216R was constructed via beneficial mutation site stacking and characterized. Compared with those of YiAPPA, the half-life of K189R/K216R at 80℃ was extended from 14.81 min to 23.35 min, half-inactivation temperature (T₅₀³⁰) was increased from 55.12℃ to 62.44℃, and T_m value was increased from 48.36℃ to 53.18℃. Meanwhile, the specific activity of K189R/K216R at 37℃ and pH 4.5 increased from 3960.81 to 4469.13 U/mg. Molecular structure modeling analysis and molecular dynamics simulation showed that new hydrogen bonds were introduced into K189R/K216R, improving the stability of certain structural units of the phytase and its thermostability. The enhanced activity was primarily attributed to reduced enzyme-substrate binding energy and shorter nucleophilic attack distance between the catalytic residue His28 and the phytate substrate. Additionally, the K189R/K216R mutant increased the hydrolysis efficiency of phytate in food ingredients by 1.73-2.36 times. This study established an effective method for the molecular modification of phytase thermostability and activity, providing the food industry with an efficient phytase for hydrolyzing phytate in food ingredients.

• 한국건설관리학회논문집
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• 제10권5호
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• pp.67-75
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• 2009

최근 건설 산업은 정보기술을 접목하여 효율성과 경쟁력을 높이는데 많은 관심을 가지고 있다. 그 중에서도 RFID는 다양한 분야에 적용되고 있으나 건설 산업의 기본 요소 인 건설자재에는 다양한 물리적, 화학적 특성 및 사용 환경 요인 등으로 인하여 적용이 용이하지 않아 현장에 적용 사례가 많지 않은 것으로 파악되고 있다. RFID를 건설 산업에 효율적으로 적용하기 위해서는 먼저 RFID 코드발급과 이를 체계적으로 관리할 수 있는 체계가 마련되어야 하고 두 번째로 건설자재 적용을 위한 주파수, 사양, 프로토콜, 패키지방법, 인식 방법 등의 표준화연구가 필수적이다. 본 연구에서는 RFID코드발급과 관리방안을 마련하고 건설자재에 적합한 RFID Tag을 선정하기 위하여 건설자재의 물성/환경적 특성 분석, 건설자재의 현장 도입 및 관리 단위, 관리형태 등을 분석하여 건설자재별 적합한 RFID 태그를 선정하고자 진행되었다. 현장 실험은 건설현장 반입 및 관리 단계로 구분하여 실험을 실시하였다. 다양한 실험 결과는 향후 건설현장에서 RFID를 활용할 경우 시행착오를 줄일수 있는 좋은 사례가 될 수 있을 것이다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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• pp.207-210
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• 2005

Information Technology (IT) makes a great contribution towards improvement of productivity in construction industry. Because most of researches of construction industry's IT are focused on the whole field of the industry or development of information system, however, these have no regard for conditions in fields. Thus, this study proposes the requirements in order to improve the productivity and efficiency of field execution of construction industry. To achieve this aim, the surveys are conducted of the problems and conditions of IT application on site workers and managers. As a result, the followings are suggested: (1) user training should be exercised continuously, (2) infrastructure of IT constructed, (3) total management system of field execution developed, and (4) the development of IT system focused on fields. Therefore, this study provides meaningful proposal that can be set up basic direction toward IT investment and IT system development.

• World Technopolis Review
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• 제1권3호
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• pp.206-225
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• 2012

The development of the Surrey Research Park by the University of Surrey is an addition to a number of existing strategies to collaborate with industry that it has developed over its 120 year history. The potential to undertake this development was based on owning a substantial land holding that the University acquired when the Borough Council for the town of Guildford invited the University to relocate from Battersea in London to its new location in 1966. Initial plans for the Park in 1979 were accelerated in 1981 in response to plans by the then government to reduce funding for Higher Education in the UK. Beyond a broad master plan for the site that was based on topography and access to the site the plans that were developed were based on a survey of 100 companies that were deemed to be in the target market for the site and a review of the other 7 science parks that were being developed in the UK in 1981. The findings from this proved to be important in developing the master plan for the site. Another important influence on the project was the objectives that were defined for the 3 stakeholders in the project of the University, the tenant companies and the planning authority relate to economic development, a competitive advantage of tenant companies, knowledge transfer, the profile for the University and the capacity to generate income proved to be a valuable framework on which to develop a master plan. These details were underpinned by five objectives which served the three stakeholders in the site. Those for the University included commercial potential, knowledge transfer and image and reputation; those for the town primarily related to economic development and the plan was to help tenants gain a competitive advantage by locating on the site. In addition a number of success indicators were defined for the project against which to measure performance and have remained as a useful set of parameters on which to base the assessment of the performance of the site. In combination with these indicators a further analysis deals with the success factors that are considered as important in influencing performance. The paper sets details the history of the park and covers the success indicators and factors and reviews these in the context of the original objectives for the site.

• 한국건설관리학회논문집
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• 제22권2호
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• pp.21-30
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• 2021

기존 건설업은 타 산업 분야에 비해 생산성이 낮은 산업에 분류된다. 건설업의 생산성 저하를 해결하고자 전 세계적으로 기존 건설 방식보다 약 40% 생산성이 높은 오프사이트 건설(Off-Site Construction; OSC)에 집중하고 있다. 이러한 높은 생산성이 가능한 이유는 공장에서의 부재를 생산, 현장으로의 운반, 현장 조립 3단계를 연속적인 흐름으로 일관되게 유지하기 때문에 가능하다. 본 연구는 문헌고찰, 1차 사전 현장답사, 2차 온라인 설문, 3차 전문가 심층인터뷰를 통해서 기능조사를 수행하였다. 조사된 기능의 항목들을 편의성, 유연성, 관리 용이성, 의사소통, 안전성 5가지로 분류하였으며, 해당 기능특성에서는 유연성, 관리 용이성, 의사소통이 높은 점수를 나타내었다. 이는 건설현장의 공사 진행에 따른 변화, 공장의 생산일정, 운반 소요시간과 같은 다양성으로 인해 유연성, 관리 용이성, 의사소통이 중요한 기능특성으로 반환된 것으로 판단된다. 마지막으로 설문 조사된 기능 점수 결과에서 평균 점수 4점 이상에 해당된 기능 15개를 바탕으로 Functional Block Diagram을 구성하였다. 본 연구를 통해 OSC 운반 시스템이 구축된다면 성공적인 건설 OSC 프로젝트에 기여하고, 생산성을 높일 수 있을 것으로 판단된다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2006년도 에너지.가스.기후변화학회 연합춘계학술대회 및 특별심포지움
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• pp.208-214
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• 2006