Beyond the Limits to Growth

Sustainable Development; Energy Policy, Economics and Management; Energy Efficiency (incl. Buildings); Climate Change Management and Policy; Renewable and Green Energy; Environmental Engineering/Biotechnolog

New Vision 2050: A Platinum Society

This book presents the "New Vision 2050," which adds the concept of the “platinum society” to the “Vision 2050”. The 20th century was a century in which energy led the development of material civilization, resulting in deletion of resources, global warming and climate change. What form should sustainable material and energy take to protect the Earth? The "Vision 2050" was established 20 years ago as a model that we should pursue for the next half century. Fortunately, the world is on course for the Vision 2050. The 21st century will be a century in which we seek qualitative richness, with the Vision 2050 as the material basis. That is, a “platinum society” that has resource self-sufficiency and resource symbiosis, and where people remain active throughout their lives and have a wide range of choices and opportunities for free participation. Since the author presented the concept of "Vision 2050" in 1999, the idea has been introduced in two books entitled Vision 2050: Roadmap for a Sustainable Earth (2008) and Beyond the Limits to Growth: New Ideas for Sustainability from Japan (2014). The latter includes a chapter that sheds light on the concept of a “platinum society”. In this publication, the author presents the "New Vision 2050" in more detail

New Vision 2050: A Platinum Society

Sustainability; Climate change; Saturation; Leading country in resolving societal problems; Resource self-sufficiency; Urban mines; Renewable energy; Human-nature symbiosis; Aging society; Longevity; Lifelong learning; Sustainable cities; Low carbon society; Zero emission; Quality of lif

触媒反応に対する物質移動過程の影響

University of Tokyo (東京大学

Are Two z~6 Quasars Gravitationally Lensed ?

Several high-z (z > 5.7) quasars have been found in the course of Sloan Digital Sky Survey. The presence of such very high-z quasars is expected to give constraints on early structure formation. On one hand, it is suggested that these most luminous objects at high redshift are biased toward the highly magnified objects by gravitational lensing. To clarify the effect of gravitational lensing on the high-z quasars, we began the imaging survey of intervening lensing galaxies. Indeed our previous optical image showed that SDSSp J104433.04+012502.2 at z=5.74 is gravitationally magnified by a factor 2. In this paper, we report our new optical imaging of other two high-z quasars, SDSSp J103027.10+052455.0 at z=6.28 and SDSSp J130608.26+035626.3 at z=5.99. Since we find neither intervening galaxy nor counter image with i^{\prime} < 25.4-25.8 around each quasar, we conclude that they are not strongly magnified regardless that a lens galaxy is dusty.Comment: 10 pages, 8 figures, Accepted for PAS

Clinical Management of Implant Prostheses in Patients with Bruxism

There is general agreement that excessive stress to the bone-implant interface may result in implant overload and failure. Early failure of the implant due to excessive loading occurs shortly after uncovering the implant. Excess load on a final restoration after successful implant integration can result in physical failure of the implant structure. Many clinicians believe that overload of dental implants is a risk factor for vertical peri-implant bone loss and/or may be detrimental for the suprastructure in implant prostheses. It has been documented that occlusal parafunction, such as, bruxism (tooth grinding and clenching) affects the outcome of implant prostheses, but there is no evidence for a causal relation between the failures and overload of dental implants. In spite of this lack of evidence, often metal restorations are preferred instead of porcelain for patients in whom bruxism is presumed on the basis of tooth wear. The purpose of this paper is to discuss the importance of the occlusal scheme used in implant restorations for implant longevity and to suggest a clinical approach and occlusal materials for implant prostheses in order to prevent complications related to bruxism