• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제21권3호
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• pp.37-45
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• 2015

Purpose: The main objective of this paper is, to evaluate the unit design for patient-centered care and to draw lessons-learned for further improvement. Methods: This study conducted a case study of the intensive care unit, designed to fulfill patient-centered care in the US. It evaluated the effectiveness of the unit by incorporating several study methods such as plan analyses, direct observations through nursing tracking and behavior mapping, and focus group interviews. Results: The major design decision made in this patient-centered unit was the use of patient rooms with designated family areas and distributed nursing stations. Both design features appeared to be a success on a variety of research metrics and outcomes. The study identified that the patient rooms ultimately help family members to spent more time with their loved ones, which leads to increased satisfaction of family members and nurses also report that they generally enjoy the distributed nurses' stations, which provide a comfortable environment to complete their regular lines of work such as charting, monitoring patients, and collaborating with their colleagues. Implications: Certain design features in intensive care units such as patient rooms with designated family areas and distributed nursing stations could appropriately support hospitals to fulfill patient-centered care.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2004년도 학술대회지
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• pp.283-288
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• 2004

The measurement of ultra low aspect ratio fluid film thickness is very crucial technique both for the verification of lubrication media characteristics and for the clearance design in many precision components such as MEMS, precision bearings and other slideways. Many technologies are applied to the measurement of ultra low aspect ratio fluid film thickness (i.e. elastohydrodynamic lubrication film thickness). In particular, in-situ optical interferometric method has many advantages in making the actual contact behaviors realized with the experimental apparatus. This measurement method also does the monitoring of the surface defects and fractures happening during the contact behavior, which are delicately influenced by the surface conditions such as load, velocity, lubricant media as well as surface roughness. Careful selection of incident lights greatly enhances the fringe resolutions up to $\~1.0$ nanometer scale with digital image processing technology. In this work, it is found that coaxial aligning trichromatic incident light filtering system developed by the author can provide much finer resolution of ultra low aspect ratio fluid film thickness than monochromatic or dichromatic incident lights, because it has much more spectrums of color components to be discriminated according the variations of film thickness. For the measured interferometric images of ultra low aspect ratio fluid film thickness it is shown how the film thickness is finely digitalized and measured in nanometer scale with digital image processing technology and space layer method. The developed measurement system can make it possible to visualize the contact deformations and possible fractures of contacting surface under the repeated loading condition.

• 한국발생생물학회지:발생과생식
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• 제15권2호
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• pp.167-172
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• 2011

멸종 위기에 처한 침팬지에서 연중번식주기와 무월경, 번식주기, 임신진단을 포함한 번식형태를 관찰하기 위하여 형광항체 분석법을 사용하여 에스트라디올, 프로게스테론, 테스토스테론 호르몬 대사산물과 인간융모성 성선자극호르몬을 측정하였다. 본 연구결과, 침팬지의 번식능력은 연령이 번식에 중요한 영향을 주는 인자가 아니며, 개체별 번식능력의 차이, 산과질환의 유무, 배우자와 합사한 조건에서 나타나는 성적행동의 차이 같은 여러 가지 요인이 복합적으로 작용한다는 것을 알 수가 있었다. 본 연구는 침팬지의 종보전과 인간과 연관된 폐경과 산과질환을 연구하는데도 유용하게 활용될 수 있을 것이다.

• Structural Engineering and Mechanics
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• 제27권5호
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• pp.625-638
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• 2007

The damage detection process may appear difficult to be implemented for truss structures because not all degrees of freedom in the numerical model can be experimentally measured. In this context, the damage locating vector (DLV) method, introduced by Bernal (2002), is a useful approach because it is effective when operating with an arbitrary number of sensors, a truncated modal basis and multiple damage scenarios, while keeping the calculation in a low level. In addition, the present paper also evaluates the noise influence on the accuracy of the DLV method. In order to verify the DLV behavior under different damages intensities and, mainly, in presence of measurement noise, a parametric study had been carried out. Different excitations as well as damage scenarios are numerically tested in a continuous Warren truss structure subjected to five noise levels with a set of limited measurement sensors. Besides this, it is proposed another way to determine the damage locating vectors in the DLV procedure. The idea is to contribute with an alternative option to solve the problem with a more widespread algebraic method. The original formulation via singular value decomposition (SVD) is replaced by a common solution of an eigenvector-eigenvalue problem. The final results show that the DLV method, enhanced with the alternative solution proposed in this paper, was able to correctly locate the damaged bars, using an output-only system identification procedure, even considering small intensities of damage and moderate noise levels.

• Structural Monitoring and Maintenance
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• 제7권3호
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• pp.215-231
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• 2020

In a reinforced concrete building different shapes of column are adopted depending on the structural orientation and the architectural aspect. When there is an increase in loading due to changes in usage or revision in the design codes these columns need to be strengthened for enhanced performance during their service life. Strengthening materials such as carbon fiber and glass fiber polymer has been successfully used however, due to high cost application other alternative materials need to be explore. Galvanized steel wire mesh (GSWM) is one of the suitable materials locally available. High tensile strength, low weight, corrosion resistance, easy installation, minimum change in dimensions of the sections and cost effectives are the advantages of GSWM. Therefore, in this paper, four different shapes of column such as circular, square, rectangular and L were wrapped with different layers GSWM and jacketed with mortar. All the specimens were tested under axial compression. The objective of the study is to investigate the effectiveness of GSWM as a confining material for strengthening of column having varying shape. Test results shows that the axial strength enhanced with wrapping of GSWM jacket and a circular column presented the highest load carrying capacity and ductility as compared to the others. From the study of 22 column specimens, it is found that axial load is increased upto 20% and 19% when circular and square column are strengthened with one wrap of GSWM respectively, while a rectangular and L column required a wraps of two and three layers respectively in order to achieved the same load capacity as that of a circular column. Based on the present study, it is concluded that GSWM can be effectively used for strengthening of different shapes of concrete columns economically.

• 방사성폐기물학회지
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• 제7권1호
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• pp.17-23
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• 2009

방사성 액체폐기물에 함유되어 있는 우라늄의 추출제 또는 아미드 (amide) 화합물 추출제를 사용한 용매추출계에서 제 3상 생성 방지제로 사용되는 dihexyloctanamide(DHOA)을 합성하고, 이를 $^{60}Co$ 감마 방사선으로 조사시킬 때 생성된 방사선 분해생성물 (radiolysis product)을 정량 분석하였다. 방사선 조사된 DHOA에 대한 FT-IR 스펙트럼과 방사선 분해생성물에 대한 GC/MS 스펙트럼 그리고 GC/MS-SIM 방법으로 측정한 결과를 근거로 octanoic acid와 dihexylamine 2종의 방사선 분해생성물의 존재를 확인하였으며, 이들 2종 화합물의 표준시약과 tridecane을 내부표준물질(ISTD)로 사용하여 GC/MS-SIM 방법으로 정량 분석하였다. 방사선 분해생성물에 대한 총 이온 크로마토그램에서 나타난 머무름 거동, 분리도 및 해 상도에서 정량 분석할 수 있는 결과를 얻었으며, 총 이온 크로마토그램에서 분리피크가 나타나는 시간은 octanoic acid는 8.65분, tridecane은 9.79분 그리고 dihexylamine은 10.27분이었다. 그리고 DHOA의 방사선 흡수선량이 증가할수록 octanoic acid의 농도는 감소하였으며, dihexylamine의 농도는 증가하였다.

• Structural Monitoring and Maintenance
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• 제5권2호
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• pp.205-229
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• 2018

Energy induced by minor earthquake and micro vibration cannot be dissipated by traditional buckling-restrained braces (BRBs). To solve this problem, a new type of hybrid passive control device, named as VE-BRB, which is configured by a BRB with high-damping viscoelastic (VE) layers, is developed and studied. Theoretical analysis, performance tests, numerical simulation and case analysis are conducted to study the seismic behavior of VE-BRBs. The results indicate that the combination of hysteretic and damping devices lead to a multi-phased nature and good performance. VE-BRB's working state can be divided into three phases: before yielding of the steel core, VE layers provide sufficient damping ratio to mitigate minor vibrations; after yielding of the steel core, the steel's hysteretic deformations provide supplemental dissipative capacity for structures; after rupture of the steel core, VE layers are still able to work normally and provide multiple security assurance for structures. The simulation results agreed well with the experimental results, validating the finite element analysis method, constitutive models and the identified parameters. The comparison of the time history analysis on a 6-story frame with VE-BRBs and BRBs verified the advantages of VE-BRB for seismic protection of structures compared with traditional BRB. In general, VE-BRB had the potential to provide better control effect on structural displacement and shear in all stages than BRB as expected.

• Asian Pacific Journal of Cancer Prevention
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• 제15권1호
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• pp.161-166
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• 2014

Lung cancer is the most common causes of cancer-related deaths worldwide, and a lack of effective methods for early diagnosis has greatly impacted the prognosis and survival rates of the affected patients. Tumor-initiating cells (TICs) are considered to be largely responsible for tumor genesis, resistance to tumor therapy, metastasis, and recurrence. In addition to representing a good potential treatment target, TICs can provide clues for the early diagnosis of cancer. MicroRNA (miRNA) alterations are known to be involved in the initiation and progression of human cancer, and the detection of related miRNAs in TICs is an important strategy for lung cancer early diagnosis. As Hsa-miR-155 (miR-155) can be used as a diagnostic marker for non-small cell lung cancer (NSCLC), a smart molecular beacon of miR-155 was designed to image the expression of miR-155 in NSCLC cases. TICs expressing CD133 and CD338 were obtained from A549 cells by applying an immune magnetic bead isolation system, and miR-155 was detected using laser-scanning confocal microscopy. We found that intracellular miR-155 could be successfully detected using smart miR-155 molecular beacons. Expression was higher in TICs than in A549 cells, indicating that miR-155 may play an important role in regulating bio-behavior of TICs. As a non-invasive approach, molecular beacons could be implemented with molecular imaging to diagnose lung cancer at early stages.

• Asian Pacific Journal of Cancer Prevention
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• 제17권11호
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• pp.4921-4927
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• 2016

Background: Cervical cancer is a major preventable cancers. The, current study aimed to assess relevant knowledge and attitude of female students and hospital staff in Iran. Method: This cross-sectional study was conducted in Medical and Nursing faculties and hospitals of East-Azerbaijan Province of Iran. Participants were medical and paramedical female students and female staff in hospitals selected by stratified random sampling techniques. Tools for data collection were questionnaires for which validity and reliability had been verified (${\alpha}=0.8$). Descriptive and inferential statistics were used to analyze data with SPSS.16. Result: Response rates were 71 % (426 from 600) and 63.5% (254 from 400) for students and staff, respectively. Some 29.1% admitted that they had no information about cervical cancer, only 70 (10.3%) thinking their knowledge as high, 360 (52.9%) as intermediate, and 237 (34.9%) as low. While 93% of participants considered cervical cancer as a severe health problem, the only statistically significant relationships with knowledge were for education (p<.001) and occupation (p<.001) variables. Conclusion: Given the importance of the roles of medical students and personnel as information sources and leaders in health and preventive behavior, increasing and improving their scientific understanding seems vital. Comprehensive and appropriate education of all people and especially students and personnel of medical sciences and improving attitudes towards cervical cancer and its monitoring are to be recommended.

• 한국정보과학회논문지:시스템및이론
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• 제37권4호
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• pp.246-255
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• 2010

CPU 자원이 다수의 가상머신에 의해 공유되는 Xen 가상화 환경에서는, CPU가 하나의 가상머신의 요청을 처리하는 동안 다른 가상머신은 CPU를 기다려야 하는 가상머신 스케줄링 지연이 존재한다. 가상화 환경에서 응용프로그램의 QoS 요구사항을 만족시키기 위하여 자원을 관리하는 대부분의 시스템은 가상머신의 자원 사용률과 가상머신에서 운영하는 응용프로그램의 성능을 모니터링하고 분석하여 자원을 재할당한다. 이 때 응용프로그램의 성능 분석을 위해 큐잉 모델 등과 같은 수학적인 모델링 기법이 사용되지만 비가상화 환경에서 사용되던 모델은 가상머신 스케줄링 지연을 고려하지 않으므로, 가상화 환경에서는 정확한 분석과 예측이 어렵고, 따라서 이를 기반으로 자원을 관리하는 시스템은 요구되는 응용프로그램의 성능을 제공하지 못할 수 있다. 따라서 본 논문에서는 Xen 가상화 환경에서 가상머신 스케줄링 지연을 반영하여 응용프로그램의 성능을 측정하고, 모든 가상머신이 일으킬 수 있는 스케줄링 지연을 최소화하는 방향으로 CPU 사용 우선순위를 설정하는 기법을 제안하고, 제안한 기법이 스케줄링을 고려하지 않은 방법에 비해 응용 프로그램의 성능을 향상시킴을 보인다.