http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Management of Emergent Networks during Disasters: A Meta-synthesis
부형욱,Larkin S. Dudley 서울대학교행정대학원 2012 Journal of Policy Studies Vol.27 No.2
Meta-synthesis is an approach to reviewing qualitative research results. Many research results dealing with improvements to emergency management can be integrated into strategies for network management in emergencies. This meta-synthesis used a keyword search and survey of experts to identify representative studies of emergency response. It then used the reciprocal translation approach to synthesizing the studies. The synthesis is captured in a two-by-two matrix, one axis distinguishing between activity- and network-level interventions and the other between planning and improvisation strategies.
Influence of uplift on liquid storage tanks during earthquakes
Ormeno, Miguel,Larkin, Tam,Chouw, Nawawi Techno-Press 2012 Coupled systems mechanics Vol.1 No.4
Previous investigations have demonstrated that strong earthquakes can cause severe damage or collapse to storage tanks. Theoretical studies by other researchers have shown that allowing the tank to uplift generally reduces the base shear and the base moment. This paper provides the necessary experimental confirmation of some of the numerical finding by other researchers. This paper reports on a series of experiments of a model tank containing water using a shake table. A comparison of the seismic behaviour of a fixed base system (tank with anchorage) and a system free to uplift (tank without anchorage) is considered. The six ground motions are scaled to the design spectrum provided by New Zealand Standard 1170.5 (2004) and a range of aspect ratios (height/radius) is considered. Measurements were made of the impulsive acceleration, the horizontal displacement of the top of the tank and uplift of the base plate. A preliminary comparison between the experimental results and the recommendations provided by the liquid storage tank design recommendations of the New Zealand Society for Earthquake Engineering is included. The measurement of anchorage forces required to avoid uplift under varying conditions will be discussed.
Diego Hernandez-Hernandez,Tam Larkin,Nawawi Chouw 국제구조공학회 2024 Structural Engineering and Mechanics, An Int'l Jou Vol.89 No.4
This research addresses experimentally the relationship between the excitation frequency and both hoop and axial wall stresses in a water storage tank. A low-density polyethylene tank with six different aspect ratios (water level to tank radius) was tested using a shake table. A laminar box with sand represents a soil site to simulate Soil-Structure Interaction (SSI). Sine excitations with eight frequencies that cover the first free vibration frequency of the tank-water system were applied. Additionally, Ricker wavelet excitations of two different dominant frequencies were considered. The maximum stresses are compared with those using a nonlinear elastic spring-mass model. The results reveal that the coincidence between the excitation frequency and the free-vibration frequency of the soil-tank-water system increases the sloshing intensity and the rigid-like body motion of the system, amplifying the stress development considerably. The relationship between the excitation frequency and wall stresses is nonlinear and depends simultaneously on both sloshing and uplift. In most cases, the maximum stresses using the nonlinear elastic spring-mass model agree with those from the experiments.
The Use of Computer Technology in Rural Nonprofit Organizations
Michelle Humphrey,김동원,Larkin Dudley 한국행정학회 2004 International Review of Public Administration Vol.9 No.2
Although nonprofit organizations may suffer from an organizational digital divide, there is little research on the extent to which nonprofits use computer technology. This paper seeks to clarify how nonprofits use computer technology, the role of volunteers in this relationship, the challenges facing nonprofits and new technology, and the attitudes of nonprofit staff regarding computer technology. Results of an exploratory survey are reported. Among the findings are that 1) size of an organization (whether measured in staff or budget) does not necessarily influence its technological capacity, 2) receiving funds designated for information technology increases an organizations technological capacity and appreciation, 3) volunteers frequently provide technical support but rarely use nonprofits computer technology, 4) a lack of funding is seen as the biggest challenge to acquiring and maintaining computer systems, and 5) human services nonprofits seem to have fewer computer resources than other kinds of nonprofits. These findings are compared to a survey with other types of nonprofits in an urban area.