Seismic Demand on Shear Panel Dampers Installed in Steel-Framed Bridge Pier Structures

This study is aimed at investigating the demand on shear panel dampers (SPDs) installed in steel structures under strong earthquake motions to serve as guidance for the recommended capacity of SPDs in seismic design. For this purpose, an extensive dynamic analysis is carried out on steel bridge pier structures with SPD devices. To describe the restoring force characteristics of SPDs, the analysis uses a newly developed combined hardening model based on experimental data. The seismic demands made on SPD devices are examined and then summarized to give recommended values for determining the necessary deformation capacity of SPDs.     

Why Didn’t Agriculture Develop in Japan? A Consideration of Jomon Ecological Style,Niche Construction,and the Origins of Domestication.

Over the course of some 12,000 years, Jomon cultures developed a highly refined adjustment to the Japanese landscape. Japanese archaeologists have exposed Jomon culture in great detail, but because it rested on wild resources, the Jomon era attracts little worldwide archaeological interest. This paper discusses Jomon ecological style in light of niche construction theory to consider the conditions that gave rise to agriculture and domestication. Jomon communities clearly managed much of their landscape and many plant and animal populations. Drawing on ideas from niche construction theory, we argue that qualities of potential domesticates are a central factor in the development of agriculture.     

Sustainable architectural conservation according to traditions of Islamic waqf: the World Heritage–listed Stone Town of Zanzibar

Sustainability in the conservation of architectural heritage is now more extensively considered than it was decades ago. The introduction of the concept of sustainability to the field marked hopes to overcome problems threatening heritage sites. There are general concepts guiding sustainable conservation. However, heritage specifics play important roles in achieving sustainability, and may direct the formulation of sustainable concepts to be applied. This paper is an attempt to add to the discourse of heritage sustainability by discussing buildings managed through a tradition of Islamic waqf in the World Heritage Stone Town of Zanzibar. It examines sustainability in terms of its financial, social, managerial, and environmental aspects. The relatively good survival rate of waqf buildings in the old town over several centuries suggests sustainable and transmissible ‘genes’ within the tradition. Waqf was found to elaborate ways to strike a balance between heritage consumption and use, avoiding gentrification, and enabling collective urban conservation. It further suggests that sustainable conservation cannot avoid monetary sacrifices, and if it is to be sustainable in the long term it should be inherent in the heritage itself.