Late Precambrian algal megafossils Chuaria and Tawuia in some areas of eastern China

Chuaria is widespread in Late Precambrian deposits throughout the world. In China it has been found in the Jingeryu Formation of Jixian County, Tianjin, and in its equivalents in eastern China including the Nanfen Formation of Liaoning and Jilin Provinces, and the Liulaobei Formation of Anhui Province. In the latter, Chuaria is associated with the genus Tawuia which Hofmann (in Hofmann & Aitken, 1979) described as algae of undertermined affinity and which is based on material from Canada. The glauconitic sandstone directly resting upon Chuaria-bearing greyish-green shale of the Jingeryu Formation in Jixian County has a K-Ar age of 0.899 Ga. This paper describes C. circularis Walcott, T. dalensis Hofmann and T. sinensis n. sp., and discusses the morphology, biological and taxonomic affinities, and age and geographic distribution of Chuaria. Because of the association of Chuaria and Tawuia in the Mackenzie Mountains, Canada, and also in the area of Shouxian County, Anhui Province, China, it is considered that Chuaria and Tawuia probably have close affinities. According to their general morphology and occurrence, both may be marine planktonic multicellular algae.     

Voluntary Environmental Governance Arrangements in the Australian Building Sector

Voluntary environmental governance arrangements (VEGAs) are designed to minimise negative outcomes through the use of collectively agreed arrangements. They have attracted a large literature, but issues remain unresolved, especially regarding their effectiveness. This article takes up a small part of this challenge of mapping the role of VEGAs in larger systems of environmental governance by examining the development and implementation of a range of VEGAs in the Australian building sector, here defined as the construction and use of buildings.

人们设计了自愿环境治理计划,意在通过集体认同的安排尽量减少消极结果。它吸引了大量文献的关注,但问题依旧是问题,特别在效率方面。本文试图回答其中一小部分问题,通过考察其在澳大利亚建筑部门（这里定义为建筑和建筑物的使用）,看看自愿环境治理计划在更大的环境治理中究竟扮演什么样的角色。     

A colpi di cuore. Storie del sessantotto

This article attempts to tackle the problem of how a colonial culture that was elaborated through the written word may have impacted on an Italian society that was significantly more ‘backward’ than its western European counterparts. The Prima Guerra d'Africa (1885-96) has often been seen as a military campaign desired exclusively by an isolated Italian government in a society that was incapable of using the occasion to develop cultural themes that impacted on the desires and aspirations of the ‘real’ Italy. This supposed societal dysfunction meant that Italy failed to create a ‘culture of imperialism’ in the years of the Scramble for Africa in a way that has now come to be considered of such central importance for the histories of France, Britain or even Germany.

Through an analysis of the role played by primary schools in Italian culture in these years, this article attempts to reverse this view, arguing that even taking into consideration Italy's ‘backwardness’ there was not only a great awareness of what Italy was supposedly doing in Africa but also a serious attempt to load the events that occured there with a meaning that had a much more intimate relationship with Italy's population. Although defeat in Africa meant a major setback in this process, imperialism as a cultural phenomenon continued to be of fundamental importance to the progress of nation building and the development of nationalism in Italy and, Finaldi argues, it should therefore be assigned a place in Italian culture that is much more on a par to that which culture and imperialism are deemed to have held for other European nation-states.     

NOTE ON THE INCLUSION OF SITE CLASSIFICATION INFORMATION IN EQUATIONS TO ESTIMATE STRONG GROUND MOTIONS

Two main regression methods have been proposed for using site category information within ground motion prediction equations, these are: (a) joint estimation of the site category coefficients and the magnitude and distance coefficients; or (b) estimation of site category coefficients by using the residuals from the equation derived without considering soil conditions. Method (a) requires each record be assigned a site category whereas for method (b), because it relies on residuals, site information can be missing for some records. This short note finds that if the mean of the transformed distances within each site category is the same then the two methods give the same site coefficients. If, however, these means are significantly different then method (b) can yield incorrect site coefficients.     

明代南京城墙建造年代考略

关于南京明城墙的建造年代,相关史料的记载或有疏漏、或相矛盾、或语义不详,造成了后世对明南京城墙建造年代的多种说法。本文根据史料并结合实地勘察,提出南京城墙建造的起至时间为元至正二十年(1360年)至洪武三十一年(1398年),前后共计39年。     

Learning to sail the Duyfken replica

The rig of the Duyfken 'replica', a reconstruction Dutch jacht of c . 1600 is described. Sail-handling techniques and sailing performance including steering with a whipstaff are also described. Experiments to improve sailing efficiency, some prompted by analysis of contemporary iconography, are discussed.     

Iron knees in wooden vessels—an attempt at a typology

Knees were brackets in the structure of a wooden ship. They were introduced in the second half of the 18th century and were in common use for naval and merchant ships in the 19th century. They were fashioned in various designs. A typology of these is proposed based on archaeological and documentary evidence. Iron knees could used to assist the dating of unidentified shipwrecks.     

论旅游企业的企业文化建设

企业化建设是现代旅游企业实现可持续发展的最根本保证。本介绍了企业化的主要内涵,分析了旅游企业化的特性。提出了旅游企业化建设的手段。     

佛光寺东大殿实测数据解读

结合山西省古建筑保护研究所2004年、清华大学2005—2006年对五台山佛光寺东大殿的手工测绘和三维激光扫描测量,本文借鉴前辈学者对于佛光寺东大殿原始设计尺寸权衡的论述,在今天毫米级精度的测量数据的基础上,得出以下结论:东大殿所用营造尺长298毫米,中五间开间1丈7尺,标准柱高同之;斗拱材宽7寸;斗拱下昂斜度等于总举斜度,基本斜度可描述成“平出47分~(?),抬高21分~(?)”,总举为此基本斜度的11倍,稍间、进深各间尺寸因此定为1丈4尺8寸;中平槫到柱头的高度等于总举高。通过上述的分析与结论,本文强调提高古建筑测绘数据全面性和精度的重要意义及深远的科研前景。