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Mass Timber: The New Sustainable Choice for Tall Buildings
Cover, Jennifer Council on Tall Building and Urban Habitat Korea 2020 International journal of high-rise buildings Vol.9 No.1
Professionals who work in the realm of tall building design and construction are well aware that high-rises are the best solution for accommodating growing urban populations. Until recently, few would have thought to include tall wood buildings as part of that solution, but there is growing awareness that tall mass timber structures can help satisfy the need for density while addressing the need-equally urgent-for a more sustainable built environment. This paper examines the trend toward tall wood buildings in the United States, including their history and international influences, market drivers, structural performance, and economic viability, as well as building code changes that allow wood structures up to 18 stories. It highlights examples of mass timber projects, with an emphasis on benefits that impact return on investment.
노태근,Stephen Coverly,김은수,강동진,강성현,나태희,조성록,이정무,문초롱 한국해양과학기술원 2015 Ocean science journal Vol.50 No.4
In this study we describe measures taken in our laboratory to improve the long-term precision of nitrate and ammonia analysis in seawater using a microflow segmented-flow analyzer. To improve the nitrate reduction efficiency using a flow-through open tube cadmium reactor (OTCR), we compared alternative buffer formulations and regeneration procedures for an OTCR. We improved long-term stability for nitrate with a modified flow scheme and color reagent formulation and for ammonia by isolating samples from the ambient air and purifying the air used for bubble segmentation. We demonstrate the importance of taking into consideration the residual nutrient content of the artificial seawater used for the preparation of calibration standards. We describe how an operating procedure to eliminate errors from that source as well as from the refractive index of the matrix itself can be modified to include the minimization of dynamic refractive index effects resulting from differences between the matrix of the samples, the calibrants, and the wash solution. We compare the data for long-term measurements of certified reference material under two different conditions, using ultrapure water (UPW) and artificial seawater (ASW) for the sampler wash.
Asymmetric Effects of Money Supply Shocks on Prices : International Evidence
Lai, Pikki,Cover, James Peery 아태경제학회 1996 JOURNAL OF ECONOMIC RESEARCH Vol.1 No.2
The study examines if there are asymmetric responses of the price level to positive and negative unanticipated changes in the money supply using data from twenty industrialized countries. It is found that positive money-supply shocks cause the price level to increase in 8 of the 20 countries, while negative money-supply shocks cause the price level to decline in only two countries. The results are consistent with predictions from a model presented by Tsiddon (1991) which predicts that negative money-supply shocks cause prices to increase rather than decrease. It also is found that average money growth and its volatility do not affect whether prices respond asymmetrically to money-supply shocks.
Pappas, Christopher T.,Mayfield, Rachel M.,Henderson, Christine,Jamilpour, Nima,Cover, Cathleen,Hernandez, Zachary,Hutchinson, Kirk R.,Chu, Miensheng,Nam, Ki-Hwan,Valdez, Jose M.,Wong, Pak Kin,Granzie Proceedings of the National Academy of Sciences 2015 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.112 No.44