北京延庆岔道城明代城墙灰浆失效因素研究

古代砖砌墙体多用灰浆作为黏结材料,其老化失效是墙体损毁的重要原因之一.本文应用红外热成像仪、X-射线荧光分析仪、X-射线衍射仪和离子色谱仪等,分析了北京市延庆地区明代岔道城遗址灰浆及其保存环境状况,通过模拟老化试验探讨了影响其长期保存的主要因素,为此类砖砌墙体保护与维修提供依据.     

Wirtschaftswunder in Pretzfeld,upper Franconia: Interactions between science,technology, and corporate strategies in Siemens semiconductor rectifier research & development, 1945–1956

Abstract

Immediately after World War II, when emergency production of non‐electrotechnical products such as stoves, pots, etc. at Siemens amounted to more than 50% and the return to normal production and old standards was the primary company goal, one man, Eberhard Spenke, thought far ahead. Power semiconductor rectifiers were to be designed and manufactured on a scientific basis rather than as a result of trial and error methods. The theory of rectification in semiconductor‐metal contacts that had been found by the Siemens theoretical physicist Walter H. Schottky was to serve as a starting point. First, apartments for researchers had to be built in a former stable at Pretzfeld Castle, Upper Franconia; lab equipment was then procured. On September 1, 1947, research work began, and the first selenium rectifiers were made on three old kitchen tables. In 1956, Spenke proudly presented the world's first reproducible silicon power rectifier elements (for a reverse voltage of 1000 V and a maximum forward current of 300 A when forced‐air‐cooled) at the international semiconductor conference in Garmisch‐Partenkirchen, Bavaria. Siemens had thus become a world leader in power electronics.

The example of Eberhard Spenke and his team can give valuable guidelines for organizing Research & Development efficiently within a big corporation. It shows that the amount of money spent on R&D is not necessarily the determining factor of success. At least equally important are such elements as personal leadership in small research groups rather than bureaucratic administration of research, the ability to foresee technological and market developments, direct contacts between the leading researchers and the top management, open‐mindedness of the top management to new ideas and approaches, and the motivation of employees.     

The atomic meal: The cold war and irradiated foods, 1945–1963

Following World War II, food technologists in the US participated in an Army‐led program to develop food irradiation technology. The program involved over 120 military, government, industrial, and academic institutions. Focusing on the MIT Department of Food Technology, I trace the networks that formed between these groups and their motivations for developing the technology. I argue that food irradiation was Cold War science directed towards the development of a consumer product, and that it highlighted the links between large‐scale military‐funded research and consumers' everyday lives. I suggest that researchers advocated for irradiation not because the technology produced better processed food, but because the development of the technology produced a number of valuable benefits for the researchers. These included increases in funding, materials, and prestige.     

Jean Renoir,The Rules of the Game,Reputation, and Revisionism

Jean Renoir's film La Règle du jeu (The Rules of the Game) was first shown in Paris, in 1939, and is now generally regarded as one of his masterpieces. But there is a strange side to the film. What most critics and reference books say concerning it—and they tend to say much the same thing—does not, to put it bluntly, square with the facts. What they say is that La Règle du jeu is about an aristocratic house-party that is a microcosm of the corruptness and exhaustion of French society on the eve of World War II. Far from perceiving in La Règle du jeu evidence of the “corruption” and “exhaustion” in French society that led to the country's defeat and occupation by the Germans during World War II, however, the author of this essay attempts to see the film for what it is—not for what historicist critics want it to be.     

The Search for a Sixth Sense: The Cases for Vestibular,Muscle, and Temperature Senses

The five senses of sight, hearing, smell, taste, and touch, enumerated by Aristotle, were incremented in the early-nineteenth century by the muscle sense, multiple dimensions of touch, and a movement sense. Aristotle explicitly excluded a sixth sense, and five remains the number of senses in popular imagination. The division of touch into several sensations was entertained and rejected by Aristotle, but it was given anatomical, physiological and psychophysical support in the late-nineteenth century. A separate muscle sense was proposed in the late-eighteenth century, with experimental evidence to support it. However, before these developments, behavioral evidence of the vestibular (movement) sense was available from studies of vertigo, although it was not integrated with the anatomy and physiology of the labyrinth until the nineteenth century. The history of the search for a sixth sense is outlined, and the evidence adduced to support the divisions is assessed. Behavioral evidence generally has been accorded less weight than that from anatomy and physiology.     

“Back in the heartland”: Seamus Heaney's “Route 110” sequence in Human Chain

This essay foregrounds the increasingly significant role translation has played in Seamus Heaney's compositional and creative practices since the 1970s, and how it functions as a means of displacement and route into imagined homecomings. It offers a detailed analysis of the sequence which occupies a central position within Human Chain, in which Heaney HeaneySeamusStations. Belfast: Ulsterman Publications, 1975. [Google Scholar] attends to and seeks to reconcile once more the different “voices of my education”, that of originary familial/parish culture of Mossbawn and Bellaghy, and that acquired at St Columb's College and Queen's University that furnished him with rich linguistic and cultural assets, but sentenced him also to a “migrant solitude” (“The Wanderer”, Stations). “Route 110” illustrates the enduring effects of both bequests, as Heaney takes scenes and motifs from Virgil's Aeneid, Book VI, which details Aeneas' experiences on his descent into the seventieth year, Heaney takes readers with him on a road back to pre-Troubles Northern Ireland in the mid-twentieth century, stopping off initially at Smithfield Market, Belfast, in order to pick up a “used copy” of the Virgil that will become his guide. What he subsequently assembles is an album of snapshots of his youth, part of his legacy to his newly-born granddaughter.     

Reflections of a London-Irish musician: an interview with Cáit O'Riordan

The second-generation Irish have played a major role in the history of popular music in Britain. The significance of Irish ethnicity in the lives and work of these musicians has recently been addressed. However, scant attention has been paid to issues of gender amongst this generation of musicians, and the role of female musicians has been largely overlooked. This essay seeks to address this issue, via an interview with Cáit O'Riordan, the former bass guitarist (and occasional vocalist) in The Pogues. The article suggests that the voice of O'Riordan might serve as a useful starting point in addressing the role of female musicians amongst the Irish diaspora in Britain.     

清代北京旗民分城而居政策的实施及其影响

本文深入分析清代北京城旗民分城而居的过程及影响。以往对北京旗民分居的讨论研究多从顺治三年始,本文在以往研究和传统史料的基础上,利用清代内阁大库档案部分奏折和《清初内国史院满文档案》等资料,论证北京旗民分城而居政策开始于清顺治元年五月入北京城时,并深入探讨其具体过程。在重新梳理清初旗民分城而居过程的同时,文章进一步分析旗民分城而居政策对城市建设及发展的影响,从北京城清代功能分区、人口流动、地理地价区位等方面探讨其影响的表现。     

桃源不在世外:论三至十三世纪武陵地区“桃花源”实体景观的建构过程

虽然陶渊明撰成《桃花源记》后,文人羽士对"桃花源"进行过不同的描述和阐释,且将其附会到武陵地区,但是迄至唐中叶,桃花源仍仅是传说中的意象,并无确指之地。唐宋之际,在道士、当地官员的推动下,桃花源在武陵县渐被塑造成了一个具体的洞天,人们开始有意识的从事桃花源的实体景观构建,此种努力至桃源建县时达到一个高峰。不同时代形塑"桃花源"的主体与背景的差异留下了不同的景观,作为实体的非连续性和作为文化资源的接续性统一于其塑造过程。     

西汉秦中祠疏说

西汉秦中祠祠主是秦二世胡亥,但何以名作"秦中",历来没有疏解。汉人以"秦中"称二世皇帝,另有因缘。笔者以为"秦中"又称"秦仲",乃是因为"仲"是表示次位的序数。所谓"秦中祠",也就是秦二世祠。