• Geomechanics and Engineering
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• 제32권4호
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• pp.387-396
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• 2023

Ground subsidence, which is a current concern that affects piled raft foundations, has occurred at a high rate in Ho Chi Minh City, Viet Nam, due primarily to groundwater pumping for water supply. In this study, the groundwater level (GWL) change affect on a piled raft foundation was investigated based on the three-dimensional finite element method (3D-FEM) using the PLAXIS 3D software. The GWL change due to global groundwater pumping and dewatering were simulated in PLAXIS 3D based on the GWL reduction and consolidation. Settlement and the pile axial force of the piled raft foundation in Ho Chi Minh subsoil were investigated based on the actual design and the proposed optimal case. The actual design used the piled foundation concept, while the optimal case applied a pile spacing of 6D using a piled raft concept to reduce the number of piles, with little increased settlement. The results indicated that the settlement increased with the GWL reduction, caused by groundwater pumping and dewatering. The subsidence started to affect the piled raft foundation 2.5 years after construction for the actual design and after 3.4 years for the optimal case due to global groundwater pumping. The pile's axial force, which was affected by negative skin friction, increased during that time.

• 한국산학기술학회논문지
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• 제19권8호
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• pp.246-253
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• 2018

본 2018년 충청북도의 주력산업은 스마트 IT 부품, 바이오 헬스, 수송기계 소재부품 산업이다. 수송기계 소재부품 산업은 기계 분야에서 미래형 수송 수단 관련 친환경 및 지능형 핵심 원천기술에 해당한다. 이 산업을 육성하기 위하여 기업지원 사업이 진행되고 있다. 본 연구에서는 기업지원 중 기술지원 사업의 대상과 방향을 설정하기 위하여 충북지역의 해당 기업의 업체 수, 종업원 수, 출하액, 부가가치 액을 수송기계 소재부품 산업의 전방 산업과 후방 산업으로 구분하여 분석하였다. 특히 50인 미만의 중소기업체에 대하여 기업의 창설이후 업력에 따른 업체 당 부가가치 변화를 분석하여 지원 대상 기업군을 설정하였다. 후방 산업의 경우, 창업 3년 이내의 업체의 부가가치 액은 연도 별로 점점 낮아지고 있어 창업 초기에 기술지원이 필요하다. 5~9년 사이의 업체는 연도 별로 극심한 변화 추세를 보이고 있어 사업 다각화 또는 신규 아이템 발굴을 위한 지원이 필요한 것으로 판단된다.

• Geomechanics and Engineering
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• 제5권1호
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• pp.17-36
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• 2013

Settlement of the piled raft can be estimated even after years of completing the construction of any structure over the foundation. This study is devoted to carry out numerical analysis by the finite element method of the consolidation settlement of piled rafts over clayey soils and detecting the dissipation of excess pore water pressure and its effect on bearing capacity of piled raft foundations. The ABAQUS computer program is used as a finite element tool and the soil is represented by the modified Drucker-Prager/cap model. Five different configurations of pile groups are simulated in the finite element analysis. It was found that the settlement beneath the piled raft foundation resulted from the dissipation of excess pore water pressure considerably affects the final settlement of the foundation, and enough attention should be paid to settlement variation with time. The settlement behavior of unpiled raft shows bowl shaped settlement profile with maximum at the center. The degree of curvature of the raft under vertical load increases with the decrease of the raft thickness. For the same vertical load, the differential settlement of raft of ($10{\times}10m$) size decreases by more than 90% when the raft thickness increased from 0.75 m to 1.5 m. The average load carried by piles depends on the number of piles in the group. The groups of ($2{\times}1$, $3{\times}1$, $2{\times}2$, $3{\times}2$, and $3{\times}3$) piles were found to carry about 24%, 32%, 42%, 58%, and 79% of the total vertical load. The distribution of load between piles becomes more uniform with the increase of raft thickness.

• 한국농공학회지
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• 제42권4호
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• pp.106-114
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• 2000

An investigation was conducted to get the basic data for establishing maintenance strategy of pipe framed greenhouses. The contents of the investigation consisted of actual state of structures, maintenance status, meteorological disaster, and corrosion characteristics of pipe framework in greenhouses. the number of greenhouses investigated was 108 in total. Most multi-span greenhouses had narrower width and lower height than the standared 1-2W greenhouse, and most of single-span greenhouses were tunnel type. In multi-span greenhouses, the size and interval of frameworks such as rafter, purline, column , and cross beam were mostly suitable, but frameworks of single-span greenhouses were mostly insufficient. After about 7 years in grounds, 8 years in joints, 10 years in bending parts. and 13 years in columns. pipe surface was mostly rusted. Most weak parts in corrosion were pipes in contact with the ground, joints, roll-up shaft pipes, and pipes close to the gutter. Almost all of the greenhouse farmers didn't pay any attention to maintenance affair in a regular interval for pipe framed grenhouses. Many greenhouses have experienced the meteorologicla diaster such as uplift of foundation, partial or complete failure by the hyphoon and/or high winds.

• 한국수학사학회지
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• 제25권3호
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• pp.53-75
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• 2012

본 논문은 복소수 개념이 정당화되는 과정에서 실수와 허수 사이의 관계가 어떻게 변화했는지를 살펴보았다. 허수가 처음 등장한 16세기에 수학자들은 현재와 동일하게 허수를 계산할 수 있었지만 허수를 수학적 대상으로 인정하기까지는 200여년의 시간이 필요했다. 수학이 발달하면서 나타나는 새로운 문제 상황이 실수와 허수의 조화를 요구하였고, 그 결과 복소수의 개념이 점차 명확해졌다. 복소수 개념 발달의 역사는 실수와 허수의 대립이 해소되어 실수와 허수를 복소수로 포괄할 수 있는 관점을 찾아가는 과정이었다. 실수와 허수가 어떤 점에서 대립을 하였고, 수학자들은 이러한 대립에 어떻게 대처하였는가에 분석의 초점을 두고, 실수와 허수의 관계를 정립하는 과정에서 나타난 새로운 사고방식이나 관점을 확인하고 그 영향을 살펴본다. 그리고 이러한 분석결과가 보여주는 교육적 함의를 기술하였다.

• 한방안이비인후피부과학회지
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• 제30권3호
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• pp.76-87
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• 2017

Objectives : This study aimed to analyze the recent acupuncture clinical trial on atopic dermatitis and to suggest the plan about how to improve its quality. Methods : Data were collected through electronic database including MEDLINE. We set up the search terms for "atopic dermatitis AND acupuncture" and limited period of data within 6 years and type for RCT(Randomized Clinical Trial), SR(Systemic Review). Results : Total 5 studies were selected. Two were RCTs, and the rest were SRs. RCTs were insufficient about acupoint selection criteria and foundation. SRs both pointed out that systematic clinical trial is required. Conclusions : Based on these, we suggested the plan as follows. 1. Selection criteria - We should reevalute the participants by using diagnostic criteria and scales. 2. Selection acupoints - We should present the foundation that why we choose these acupoints. 3. Establishing acupuncture and control group - We should make control group clearly after calculating the number of participants statistically. 4. Blinding - We should propse the method, type, procedure and evaluation about randomization. 5. Evaluation scale - We should select the suitable scales for research objectives.

• Journal of Information Science Theory and Practice
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• 제5권4호
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• pp.49-67
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• 2017

This article assesses the recent development of libraries in Myanmar and efforts to build the sector's capacity leading up to and after the first democratic elections held in the country in nearly 50 years, at the end of 2015. Cyclone Nargis in 2008 is viewed as a 'framing event' (Birkland, 1998) that led to national legal and policy reforms, an increase in national and international projects to support development of Myanmar libraries, and the strengthening of local actors including the Myanmar Library Association to coordinate and lead development activities. Although in need of modernisation, networking, and professional skills, the existence of a widespread number of all library types across the country provides an important foundation for further development. The current status and readiness of libraries is explored in the broader context of the rapid leap from limited to more widely available access to information and technology. The article finds that there is great potential for libraries in Myanmar to support the continued transition to democracy as evidenced by the role of libraries and access to information in other countries that have transitioned. Remaining challenges include the potential of backsliding on national reforms, and the need for significant investments in infrastructure and skills. Libraries must be transformed to meet the changing needs of information users in a young democracy.

• 웰빙융합연구
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• 제5권2호
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• pp.15-19
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• 2022

Purpose: This pilot study aimed to clarify features of motor module during walking in exercise experts who experienced lately repeated training for sports skill. To identify motor modules, autoencoder machine learning algorithm was used, and modules were extracted from muscle activities of lower extremities. Research design, data and methodology: A total of 10 university students were participated. 5 students did not experience any sports training before, and 5 students did experience sports training more than 5 years. Eight muscle activities of dominant lower extremity were measured. After modules were extracted by autoencoder, the numbers of modules and spatial muscle weight values were compared between two groups. Results: There was no significant difference in the minimal number of motor modules that explain more than 90% of original data between groups. However, in similarity analysis, three motor modules were shown high similarity (r>0.8) while one module was shown low similarity (r<0.5). Conclusions: This study found not only common motor modules between exercise novice and expert during walking, but also found that a specific motor module, which would be associated with high motor control ability to distinguish the level of motor performance in the field of sports.

• 기본간호학회지
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• 제8권2호
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• pp.210-219
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• 2001

Purpose: To examine the effects of the GEAP on pain, fatigue, self-esteem, perceived health status and self-efficacy in patients with chronic arthritis. Methods: One group Pre- & post-test design was used. Outcome domains included pain, number of painful joints, fatigue, self-esteem, perceived health status and self-efficacy. Thirty-four patients were recruited over four times from a rheumatic clinic affiliated to a university medical center in Seoul, Korea The GEAP is an exercise program modified by the investigators from PACE program which developed by Arthritis Foundation. The program duration is about 60 minutes, three times a week for 6 weeks. Participants were predominantly women (68%) ; on average 57.3 years old; and diagnossed with RA (58.8), osteoarthritis (29.4) or other (11.8). Results: After completing the GEAP, subjects showed significant improvement in pain (p=.02), number of painful joints (P= .04), fatigue (p= .0001), and perceived health status (P=.006). There were no improvements in self-esteem and self-efficacy score for adults with chronic rheumatic diseases. Conclusion: This study showed that the GEAP is an effective exercise intervention for improving outcomes for patients with chronic arthritis. More sample and research are needed to 1) accurately evaluate on self-esteem and self-efficacy; 2) understand and improve adherence. And also a longer follow up period is recommended to evaluate long-term effects of the PACE program.

• 대한방사선기술학회지:방사선기술과학
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• 제5권1호
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• pp.77-95
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• 1982

The result of this study from surveying and analyzing the present situation of educational institutes of radiologic technology, educational situation of radiologic technology, and students' attitude and recognition about the education of radiologic technology, the faculty's thought of it throughout the country from October, 1981 to April, 1982 is as follows: 1. The total number of educational institutes for radiologic technology is 11, but all of them are private colleges classified by foundation and 1,414 freshmen were admitted to enter the colleges by admission quotas of students at present in March, 1982. 2. The number of male(1965-1982) is 3,046(78.0%), that of female is 856(22.0%), and total of them is 3,904 that graduated from the departments of radiologic technology in 9 junior colleges in Korea. 3. The number of the instructional staffs in radiologic technology in Korea is 32, but among them 1 professor, 1 associate professor, 16 assistant professors and 14 full-time instructors. 4. The credits for graduation are 80-96 credits and students need required liberal arts and required major studies to get the qualification for graduation. 5. In the national examination for radio-technologist license, total 7,150 persons took the examination, but only 2,796 persons passed it, therefore, the average passed rate is 39.1% from the year 1965 to 1982. 6. 61.3% of students expressed dissatisfaction about their campus lives, the reason of which is mainly poor educational facilities(26.7%), insufficient number of faculty(21.2%) and negative Recognition on junior college from society, etc. 7. About the education of their major studies of colleges, 70.9% of students answered that they were short of laboratory works and clinical trainings rather than theoretical lessons. 8. The chief problem in practice works is about facilities and equipemtns for practice (students 39.1%, faculty 68.8%), and about the fact that too many students usually work at a time(students 17.1%, faculty 21.9%), etc. 9. 87.4% of students and 93.8% of faculty answered that clinical training in school is necessary. 10. Students' viewpoints on the radiologic technologist and the attitudes on the profession as a radiologic technologist are approximately affirmative. 11. Fields of employment to advance after graduation are mainly the fields related to their major studies(hospital, clinic, health clinic, industrial companies related and military officers of medical technology, etc.), which fields arc predominant to 74.5% rather than non-related fields(enrols into 4 year colleges, etc.). 12. 85.2% of students, 87.5% of the faculty expressed their opinions that the present academic years of 2 should be lengthened more. 13. 90.7% of the faculty expressed their opinions that the present students quotas should be reduced in whole or in part.