Guidelines for On-Site Assessment of Historic Timber Structures

In the scope of European Cooperation in Science and Technology–Wood Science for Conservation of Cultural Heritage (COST IE0601–WoodCultHer) (available at http://www.woodculther.org) it was agreed to produce Guidelines for the Assessment of Historic Timber Structures, covering the principles and possible approaches for the safety assessment of old timber structures of historical relevance that could be used as the basis for possible European Standards, as discussed with CEN/TC346 (Conservation of Cultural Heritage).

This approach was targeted at all those concerned with the conservation of heritage buildings. These guidelines should also help decision-making regarding the need for immediate safety measures. The aim is to guarantee that inspection and assessment measures provide the necessary data for historical analysis, structural safety assessment, and planning of intervention works, while having minimal impact on the building fabric (the original materials, structural systems, and techniques).This article provides information on the criteria to be used in the assessment of load-bearing timber structures in heritage buildings. It covers the preliminary assessment (desk survey, preliminary visual survey, measured survey, structural analysis, and preliminary report), as well as the detailed survey of timbers (with a special emphasis on visual strength grading on site) and carpentry joints. The subsequent diagnostic report and the detailed design of repairs are outside its scope.     

清代博爱李自奇卖地契李仲买地契的史料价值

李自奇是李牟的父亲。李仲号大亮,是李岩的二哥。康熙元年李自奇卖地契,十二年李仲买地契,与康熙五十五年《李氏家谱》中有关记述可相互佐证,既为研究清初豫北土地买卖提供了具体资料,也为研究明末李自成军中的李牟、李大亮提供了佐证资料。     

青海历史文化的产生及演变

准确的文化定位,对于一个地区文化历史渊源的追溯、文化内涵的发掘具有重要的意义。作者通过对西羌文化在青海大地上的发展历程的论述,认为西羌文化更能反映青海文化的产生以及在相当长历史时期内发展演变的情况。     

Archaeology of Northeast Thailand in Relation to the Pre-Khmer and Khmer Historical Records

An earlier study of how the archaeological data from the Khmer period in northeast Thailand confirm and augment the information from historical texts is expanded into an examination of the early historic pre-Khmer and the post-Khmer periods. For these, both the historical and the archaeological data are more limited and problematic. The archaeological record confirms generally the changes associated with the transition from prehistory to history but raises questions about the sources of external influence and the types of political and economic organization which characterized northeast Thailand societies. More robust archaeological data and more precise chronological control will be necessary to test historical models of pre-Angkorian and post-Angkorian political development.     

论西安历史文化名城的可持续性保护

保护历史文化名城已为人们所普遍关注,可持续发展理念是处理发展与保护过程中矛盾的基本手段,为克服城市诸多矛盾与问题提供了基本的思路。文章分析了西安历史文化名城保护中的主要问题,指出西安应从城市的发展战略、规划布局、城市设计等方面统筹历史文化名城的保护,综合协调城市社会经济发展和历史文化遗产保护的关系,现代城市建设有机承继城市的历史文化精神。     

历史时期内蒙古LUCC时空过程及其驱动机制

本文的研究中,在内蒙古地区地质学、古地理学和环境演变方面已有研究成果以及考古与历史文献资料的基础上,修复和描述了内蒙古陆地形成以来的地质历史时期和人类历史时期内蒙古土地利用/覆盖时空演变过程,并探索其驱动机制与因素,从而为正确把握内蒙古地区近现代土地利用/覆盖变化时空轨迹提供科学依据。古代相当长的历史时期,内蒙古地区基本上被游牧民族所占据,达到了一种古代的可持续发展。清代中期以后,特别是进入20世纪以来,随着几次大规模的移民拓荒高潮,耕地面积急速扩展而草场面积日益退缩,内蒙古草原生态环境遭遇空前的破坏,沙漠化和草原退化急速加快,土地利用变化和土地利用方式成为了土地覆盖变化的最主要驱动因子。土地利用变化(开垦草原、毁林开荒)的驱动因子主要有人口因素、经济利益和政府决策等三个方面,而且每一次大规模开荒时期三者往往相辅相成,促成新一轮的开荒高潮。     

Reconstructing Nineteenth-Century Midwest Foodways: Ceramic and Zooarchaeological Information from the Moore-Youse House and Huddleston Farmstead

Settled by families from the South and the Northeast, during the 1800s Indiana was a cultural crossroads. Ceramic and faunal data recovered from excavations conducted at the Moore-Youse house and Huddleston farmstead in east central Indiana provide a relevant archaeological example of midwestern foodways during the nineteenth century. Vertebrate faunal material from the two sites reveals early use of wild resources followed by greater reliance on beef and pork after the 1850s. Stratigraphic analysis results of zooarchaeological information are also presented to illustrate diachronic trends in faunal use at the two residences.     

马克思自然概念的多维度解读

马克思以前的自然概念以非实践的方式来看待自然,割裂了自然与人、自然与历史、自然科学与人的科学的联系。马克思“感性的自然”突出了自然界与人的相关性;“人化的自然”强调了自然概念的社会历史性;“历史的自然”体现了自然与历史的辩证法;“人本学的自然”是对自然科学与人的科学分离的克服;“价值的自然”是对人与自然和谐的守望。     

The Influence of Indoor Climate Control on Risk for Damages in Naturally Ventilated Historic Churches in Cold Climate

This article analyzes the indoor climate that creates risk of damages in naturally ventilated churches in the cold climate of Estonia. Indoor temperature and humidity were measured over a one-year period and the results were analyzed on the basis of damage functions: mold growth, risk of cracking and fracturing of wooden objects, and delamination of the gesso layer of panel paintings.

In unheated churches, one of the most dominant problems was very high relative humidity throughout the year, creating a high risk for mold and algae growth. Churches may need background heating to avoid freezing during a long cold winter that causes low surface temperatures of massive walls during the spring–summer period. It was found that mold risk was significantly lower in heated churches than in unheated or intermittently heated churches. The risk of mold growth was not decreased by the use of intermittent heating.

In heated churches, overheating (room temperature >+10ºC) causes a RH below 50% during cold periods, and the favorable period for irreversible response of panel paintings was significantly longer, so there is a higher risk that the gesso may crack or delaminate. From the point of view of the cracking and fracturing of wood, indoor climate conditions are in the safe range for most of the year.     

Estimating Antebellum Passenger Costs: A Hub-and-Spoke Approach

Abstract

Over 30,000 miles of railroad and 4,000 miles of canals were constructed in the United States between 1815 and 1861. However, the lack of data has prevented the study of this “transportation revolution” for most cities. This article thus enables a closer study of antebellum travel improvements by constructing a hub-and-spoke network that is capable of estimating the cost of passenger travel from New York City and Philadelphia to any U.S. city in 1836, 1850, 1856, 1859, and 1867. The semi-parametric approach provides an accurate cost estimate by using available historical information to determine the travel cost to all other cities.