Reaction of 2-t-butyl-1,3-butadiene with π-allylic palladium complexes. A novel cyclization of allylilc ligands

The reaction of 2-t-butyl-1,3-butadiene with π-allylic palladium chlorides is described. The 2-chloroallyl complex gives a π-allylic complex with an open chain structure, in which the butenyl group in is the anti-position. Allyl-1-carbomethoxyallyl-, methallyl-, and 1-carbomethoxymethallyl-palladium chlorides give six-membered cyclic complexes. The product of the former two are π-allyllic and those of the latter are σ-bonded complexes.     

Nd-isotopic composition of Phanerozoic sediments in the Inner Zone of Southwest Japan Arc: implications on provenance characteristics and contribution to formation of mature island arc system

The Nd-isotopic data on sedimentary and metamorphic rocks of SW Japan Arc allow their discrimination into five different depleted mantle (Tdm) model age clusters, 2.6-2.45 Ga, 2.3-2.05 Ga, 1.9-1.55 Ga, 1.45-1.25 Ga, 1.2-0.85 Ga. The 2.6-2.45 Ga and 1.9-1.55 Ga model ages are also coincident with U-Pb inherited zircon ages of the above two epochs as well as the major magmatic activity in the Sino-Korean Craton (SKC). The 2.3-2.05 Ga model ages can be considered as the initial formation ages for the precursors of sedimentary rocks. The Nd-isotopic data suggest that the Hida Belt was most likely formed as a part of the SKC. The mantle underlying the Ryoke Belt had continental lithospheric signature during Triassic-Jurassic period. The 1.9-1.55 Ga model ages, especially 1.8 Ga~, can be associated with the formation of this belt. The source material for the sedimentary rocks occurring in the accretionary terrane of northeastern areas in the SW Japan Arc was probably in and around the SKC of the Ryoke Belt itself. The sedimentary rocks occurring in southwestern areas of the Arc were mainly composed of materials derived from a relatively younger source (1.45-0.85 Ga).     

企业质量管理体系的建立与认证

本文主要介绍企业如何建立和实施质量管理体系,并进行认证.     

日本电信业最新发展

自１９９９年中期以来,日本电信界以ＮＴＴ重组为契机,从市场和用户的需求出,在继续推动传统业务不断发展的同时,积极推出一批基于ＩＰ技术的新业务,特别是ＮＴＴＤｏＣｏＭｏ推出的ｉ－ｍｏｌｄｅ移动数据业务,在世界上更是处于领先地位,对将来实施３Ｇ进行了有益探讨。     

基于PKI/PMI的授权管理模型设计

随着计算机应用系统的日益庞大,用户身份认证、访问控制和权限管理成为应用系统安全关注的焦点。如何结合PKI、PMI技术为应用系统提供一种统一的身份认证、授权管理和访问控制是论文想要探讨的问题。文中介绍了一种基于PKI的PMI授权管理访问控制模型,并提出了基于属性证书实现访问控制的方法。     

一种面向行业应用的互联网充值终端

本文提出了一种适合行业应用的互联网充资终端方案。该方案中通过行业监管机构对地方使用的充资终端预初始化——将行业监管机构的管理证书预先下载到终端里,当地方上将自己的应用证书以及密钥下载入终端时,首先要通过行业监管机构服务器的认证,通过后才能进行下载。     

日本国民科学素养框架体系的构筑

在年轻人对于理科学习日益疏远的社会现实背景下,2005年,日本学术会议发起了《科学技术的智慧》计划。以北原和夫为首,来自七大领域的150名科学研究相关人员立足于日本的科学技术的现状与传统文化,勾勒出所有日本人应该共有的科学技术基础素养的框架结构并据此制成了报告书。该框架如今不仅用于设置中小学校理科教育的课程大纲之中,并且也成为社会中大众科学教育(科学馆、科学展等)的指导方针。     

日本移动通信运营商资费策略解读

深入介绍了日本移动通信运营商现行的五种主流资费策略。在此基础上,着重论述了日本移动通信运营商目前实施的年间优惠、家族优惠和数据业务单价折扣等资费方案。对于我国移动通信运营商制定资费策略的借鉴意义.     

日本新修订的高中化学课程概览

2018年3月日本文部科学省公布了新修订的、拟于2022年正式施行的《高中学习指导要领》。新修订的高中学习指导要领充实了高中化学课程的目标，形成了促进获得知识与技能，注重培养思考力、判断力、表现力，培养科学探究的态度等为核心的新目标体系，并调整了“化学基础”和“化学”2门课程的部分学习内容及学习要求。     

Development and present status of seismic evaluation and seismic retrofit of existing reinforced concrete buildings in Japan

This paper describes the development and present status of seismic evaluation and seismic retrofit of existing buildings mainly for low-rise and medium-rise reinforced concrete buildings in Japan. First, since the seismic evaluation of existing buildings has close relationships with the seismic design of new buildings, a brief history of the development of seismic design, seismic evaluation, and seismic retrofit is provided in terms of major earthquake disasters mostly in Japan and associated with some major events in the U.S. Then, the development of seismic evaluation and retrofit is reviewed, focusing on the items in which the author has been deeply involved. This provides insight into previous earthquake damage, methodologies for seismic evaluation, the basic concept of the Standard for Seismic Evaluation of Existing Reinforced Concrete Buildings, studies on the demand criteria for seismic safety, and the present status of seismic evaluation and retrofit. Finally, the typical methods of seismic retrofit and some examples of retrofitted buildings in Japan are explained.