The days when Wangdu was a serf are long gone, since democratic reform in Tibet in 1959 declared the endof serfdom there. However, he won fame and was remembered as Serf Champa.
Introduction.The study of catastrophic events that affected past marine ecosystems provides us the unique opportunity to establish models which can be applied to ongoing environmental changes and to understand future ...Introduction.The study of catastrophic events that affected past marine ecosystems provides us the unique opportunity to establish models which can be applied to ongoing environmental changes and to understand future evolution of the biotas.The growing interest of the society for the ongoing and potential future environmental changes attests for the value represented by the analysis of past climatic changes.In the case of the Toarcian Oceanic Anoxic Event(T-OAE,Early Jurassic;~182 Ma),a dramatic change of marine ecosystems related to massive extinction has been documented in several areas around the world.The Pliensbachian–Toarcian transition and the T-OAE are two global episodes recording worldwide palaeoenvironmental perturbations(Jenkyns,1988;Jenkyns and Clayton,1997;Hesselbo et al.,2007).The end of the Pliensbachian regression is followed by a transgression occurring in the Early Toarcian(Haq et al.,1987;de Graciansky et al.,1999).This transgression was also coeval with a widespread deposition of black shales(Jenkyns,1988),a global warming(Garcia Joral et al.,2011;Korte and Hesselbo,2011;Suan et al.,2011),and perturbations of the carbon cycle indicated by a negative carbon isotopic excursion(CIE)documented in both marine and terrestrial material(Jenkyns and Clayton,1986;Schouten et al.,2000;Hesselbo et al.,2007;Al-Suwaidi et al.,2010;Caruthers et al.,2011;Izumi et al.,2012;Reolid,2014).展开更多
China’s Compulsory Education Law,determining the development of compulsory education,was first promulgated in 1986 and then amended in 2006.It has been a symbolic milestone in the history of Chinese education.During ...China’s Compulsory Education Law,determining the development of compulsory education,was first promulgated in 1986 and then amended in 2006.It has been a symbolic milestone in the history of Chinese education.During two decades,there have been totally 8 influential reforms in compulsory education funding policy.From the viewpoint of practical analysis and value analysis about policy changes,China’s compulsory education funding policy is still in a state of dramatic changes and mixed changes,which shows some disadvantages.展开更多
文摘The days when Wangdu was a serf are long gone, since democratic reform in Tibet in 1959 declared the endof serfdom there. However, he won fame and was remembered as Serf Champa.
基金This is a contribution of the IGCP-655 project of the IUGS and UNESCO.
文摘Introduction.The study of catastrophic events that affected past marine ecosystems provides us the unique opportunity to establish models which can be applied to ongoing environmental changes and to understand future evolution of the biotas.The growing interest of the society for the ongoing and potential future environmental changes attests for the value represented by the analysis of past climatic changes.In the case of the Toarcian Oceanic Anoxic Event(T-OAE,Early Jurassic;~182 Ma),a dramatic change of marine ecosystems related to massive extinction has been documented in several areas around the world.The Pliensbachian–Toarcian transition and the T-OAE are two global episodes recording worldwide palaeoenvironmental perturbations(Jenkyns,1988;Jenkyns and Clayton,1997;Hesselbo et al.,2007).The end of the Pliensbachian regression is followed by a transgression occurring in the Early Toarcian(Haq et al.,1987;de Graciansky et al.,1999).This transgression was also coeval with a widespread deposition of black shales(Jenkyns,1988),a global warming(Garcia Joral et al.,2011;Korte and Hesselbo,2011;Suan et al.,2011),and perturbations of the carbon cycle indicated by a negative carbon isotopic excursion(CIE)documented in both marine and terrestrial material(Jenkyns and Clayton,1986;Schouten et al.,2000;Hesselbo et al.,2007;Al-Suwaidi et al.,2010;Caruthers et al.,2011;Izumi et al.,2012;Reolid,2014).
文摘China’s Compulsory Education Law,determining the development of compulsory education,was first promulgated in 1986 and then amended in 2006.It has been a symbolic milestone in the history of Chinese education.During two decades,there have been totally 8 influential reforms in compulsory education funding policy.From the viewpoint of practical analysis and value analysis about policy changes,China’s compulsory education funding policy is still in a state of dramatic changes and mixed changes,which shows some disadvantages.
