Although there is a general consensus on which are the leading world cities, there is no agreedupon roster covering world cities below the highest level. This paper reports the construction of an inventory of world cities based upon their level of advanced producer services. Global service centres are identified and graded for accountancy, advertising, banking/finance and law. Aggregating these...

OBJECTIVE To share four Canadian cities' experiences with bed bug infestations and to explore public health roles in managing them. METHODS We summarize presentations from a workshop at the 2010 Canadian Public Health Association Conference which examined the re-emergence of bed bugs in Canada and compared management approaches of municipal and public health authorities in four large Canadian...

Abstract Housing modernization played one of the most important roles in processes interwar European cities. In this context, development housing Vilnius, which belonged to Poland 1919–1939, is researched. The research based on theory “housing-based urban planning” developed by Yael Allweil and Noa Zemer. This conceives structure as single problem rather than disconnected realms planning. Based...

City parks, important environments built for physical activity, play critical roles in preventing chronic diseases and promoting public health. We used five commonly used park indicators to investigate the spatiotemporal trend of city parks in mainland China between 1981 and 2014 at three scales: national, provincial and city class. City parks in China increased significantly with a turning poi...

Urban megaregions have emerged as a new urbanized form. However, previous studies mostly focused on urban expansion at the city scale, particularly for large cities. Understanding urban expansion at the regional scale including cities having different sizes is important for extending current knowledge of urban growth and its environmental and ecological impacts. Here, we addressed two questions...

in this paper, the concept of countably near ps-compactness inl-topological spaces is introduced, where l is a completely distributive latticewith an order-reversing involution. countably near ps-compactness is definedfor arbitrary l-subsets and some of its fundamental properties are studied.

The bone marrow niche is an intricate microenvironment with multiple cell types, gradient of cytokines and oxygen concentration. The niche has a substantial and intricate role in both health and disease, including the accommodation of cancer cells in the dormant phase. Since the cancer stem cells can survive as dormant cells in the bonemarrow, an understanding of the nichewould be important for...