The Influence of Hygroscopic Materials on the Fluctuation of Relative Humidity in Museums Located in Historical Buildings

ABSTRACT

The preservation of artefacts in museum collections is profoundly affected by fluctuations in temperature and, especially, relative humidity (RH). Since the late nineteenth century, many studies have been carried out on the best way to control hygrothermal conditions. In old buildings located in maritime temperate climate zones (such as Portugal) with strong thermal inertia, and which have low ventilation rate (relative to the volume and number of visitors), daily and seasonal hygroscopic inertia may help to assure the maintenance of RH stabilization conditions. The use of expensive active systems may be minimized through the passive behaviour of internal finishing building materials. This work presents the results of an experimental laboratory study conducted in a flow chamber to demonstrate the enormous potential of hygroscopic materials in stabilizing interior relative humidity. Based in these results and in-situ monitoring in a museum housed in a building, located in Porto, with a typical construction of the 1950s (granite masonry and reinforced concrete slabs), a numerical analysis was done to quantify the influence of hygroscopic materials in stabilizing the interior relative humidity.     

Proclaiming Library Worth in a Program Prioritization Process at a Mid-Sized Public University

Abstract

In an economic climate when colleges can no longer presume that legislators see institutions of higher learning as tacit public goods, institutions around the country are facing budget cuts. This article presents a case study of the experience of a mid-sized public state university and its Library in a budget crisis undergoing a university-wide program prioritization process. The authors review the process of writing three reports on the Library’s value, along with the approach to engaging staff in the process including a retreat. This article raises questions about what every library should consider assessing and provide tools for libraries navigating similar terrain.     

Medieval and renaissance glass technology in Valdelsa (Florence). Part 1: raw materials, sands and non-vitreous finds

A significant number of archaeological finds of the 13th–16th century from the Tuscan sites of Germagnana and Gambassi in Valdelsa—FI, was studied by different physico-chemical investigations (SEM–EDS, ICP, Mössbauer spectroscopy, XRD, XRF, TG-DTA) in order to contribute to clarify the production methodology and the pre-industrial glass manufacture technology. The studied samples are mainly non-vitreous finds as production waste, refractory materials, crucibles and raw materials; also vitreous finds as frits, skims, glasses (glass masses, glass working waste and finished products) have been taken into consideration. The obtained petrographic and physico-chemical data strongly suggest that both Gambassi and Germagnana glass manufactures were strictly connected with the sources of vitrifiable materials, situated in Tuscan sand quarries. In particular a comparison between sands from the neighbouring quarries and appropriate finds of the two archaeological sites evidences that the employed vitrifiable materials possibly belong to La Casina La Cava resort. The archaeological classification, based on macroscopic observation and stratigraphic position, was compared and verified with the scientific classification of the examined finds of Germagnana and Gambassi sites based on their composition, morphology and physico-chemical properties.     

中国竞技体育人力资源相关问题探讨

对竞技体育人力资源的概念、特点等问题进行了探讨：研究表明，竞技体育人力资源是指竞技体育发展所需人员的现实及潜在禀赋的总和。处于不同层次、不同领域的众多人员组成了竞技体育人力资源系统：竞技人力资源具有稀缺性、目标性、整体性及调控性等特点.     

国内运动生物力学发展现状思考

运动生物力学是一门新兴的边缘性科学，其定义、研究范畴、研究方法都有待商榷。从这三个角度出发，主要对大量资料进行归纳总结，综合、概括了目前国内运动生物力学发展状况。力求对我国的运动生物力学发展的状况勾勒出一个清晰的脉络图，以便在这门学科今后的研究中减少盲目性，具有更强的实用性。     

奥运会的经济价值分析以及对北京举办奥运会的借鉴意义

2008年北京奥运会的举行将大大加快北京地区乃至我国的经济现代化建设的步伐。应用实证研究的方法，对历届奥运会的经济价值进行分析，指出举办奥运会对促进北京地区乃至全国的经济增长、改善劳动力就业，加快产业结构调整的积极作用。同时从资金筹措、场馆建设、产业可持续发展等方面对北京避免奥运会后可能出现的“经济低谷效应”，实现可持续发展提出了建议。     

网络型电子期刊编目原则探讨

网络型电子期刊的编目原则问题是进行该类型资源编目首先要解决的问题,本文针对网络型期刊的特点探讨了两种原则以及相应的著录要求,即:单记录原则(在印刷版/原始记录中给出访问路径);为网络版期刊单独建立记录的原则。笔者建议采用后者,并讨论了网络型电子期刊的著录信息源的选取。     

体育课教学质量评估研究

评价一堂体育课，总要有几条简明扼要的标准。传统的评价标准在一定阶段促进了我国学校体育的发展，但在实施素质教育的今天，已不能完全适应时代的要求，有时甚至阻碍了素质教育的发展。一堂好的体育课要作到全力引导全体学生参与，提高学生参加活动兴趣，使其有愉快的心理体验。同时保证教学的目标、教材、手段相配套，课堂教育的度、量、序安排科学，这样才能建立师生间民主合作的人际关系。１研究对象和方法１．１研究对象笔者对兰州大学２０００、２００１级文理科各１２００名男女学生进行问卷调查，年龄均在１８～２０岁之间。调查后…     

依托油脂行业 办好《中国油脂》

介绍《中国油脂》依托油脂行业，办好期刊的做法和体会。