20 3 運動方程式
b > 0 ならば g + b > g なので，両質点にとって実質的な重力加速度が大きくなったと感じる。これはエレ ベーターが上昇し始める瞬間の感覚と同じ。他方 b < 0 ならば g + b < g となり，重力加速度加速度が小さく なったと感じる。同じくエレベーターが下降し始める瞬間の感覚である。 b = −g すなわち滑車が自由落下す るとき， a = 0 となり滑車に対する加速度は 0 になる
IUCN/ Conservation International Biodiversity Assessment Unit, c/o Conservation International, 2011 Crystal Drive, Suite 500, Arlington, VA 22202, USA
Fresh water covers only about 0.8% of the surface area of the Earth. Consequently, freshwater ecosystems have often received less attention in science and conservation than the larger terrestrial and marine biomes. Nevertheless, more than 126,000 freshwater species live in or depend upon freshwater ecosystems for their life history. These species are vital for maintaining the proper function of the freshwater ecosystems where they live. Asia has relatively high levels of species richness, yet we lack adequate information about many of these species or the condition of the ecosystems in which they are found. To address this knowledge gap, IUCN has been conducting assessments of the distribution and conservation status of freshwater species through several parts of Asia. This information can be used to identify global priorities for conservation. The information from biodiversity surveys, such as those conducted by IUCN, can be also compared with data sets on other biological, physical, and socio-economic characteristics of wetlands around the world, to make even more comprehensive analyses of the state of these wetlands. This information can also identify where there are data gaps that can be filled by remotely sensed information, or further field monitoring and surveying. Organisations such as Ramsar, GEO BON, and several academic and non-governmental organizations are interested in developing a framework for bringing together these freshwater data sets and analyzing them. One proposed output is the development of a tool that will define the ecological health of watersheds in terms of how well they provide ecosystem services to human communities. This will assist landscape managers and policy-makers implement optimum strategic adaptive management of freshwater systems, based on the best available scientific information on conservation and sustainable use of biodiversity and ecosystem services.
Ci occupiamo della promozione e dello sviluppo degli studi d'italianistica nella regione di Kansai. A questo scopo, è dal luglio 2014 che si tiene ogni mese un incontro di studio: il tema può essere di varia natura. Chiunque fosse interessato a partecipare sarà benvenuto.