古建筑木构件的防火处理与性能研究

古建筑具有重要的文化价值和经济价值,是重要的不可再生文化遗产。中国的古建筑以木为主要结构,而木结构的耐火等级低,这就造成了中国古建筑面临了一个极大的隐患——火灾,因此对古建筑木构件的防火处理与性能的研究迫在眉睫。为此,试验选取3种不同的木材和5种不同的阻燃剂作为研究对象,首先对涂覆不同阻燃剂的木材进行表观特征测量,然后分别采用热重分析法和扫描电子显微镜测试技术进行表征测试,最后分析阻燃木材的各种力学性能测试。研究结果表明:喷涂阻燃剂的木材其性能效果均优于未喷涂的木材。特别针对未涂油漆的原木构件,可以采用有机磷杂环阻燃剂或磷—氮类阻燃剂;普通油漆的木构件则适用于磷—氮类阻燃剂,而处理桐油木构件应用磷—氮类阻燃剂或阻燃油。     

旅游规划公众参与的核心内容初步研究

本文从旅游规划的公众参与角度入手,系统地梳理了国内外旅游规划公众参与研究进展;围绕谁参与、为什么参与、参与方式、参与行为及参与时间等问题,初步探讨了旅游规划公众参与核心内容,即包括识别利益主体、分析参与决策行为、明确公众参与模式、确定主体参与阶段、选择合意参与方式等。通过这些问题的研究,以加强和推动公众参与旅游规划的深入研究。     

甘肃出土糟朽木器的形态与结构分析

甘肃出土木器依据形态与结构划分,属于典型的糟朽木器类型,材质外观特征与特性明显。制作材质鉴定表明,基本类型有①松科云杉;②松科冷杉;③柏科圆柏。通过对糟朽木器形态类型、结构属性、影响因素及发生改变原因剖析,指出了糟朽木器材质在经历了第一阶段的转折性根本改变后（含水率远低于纤维饱和点）,即将面临第二阶段的转折性根本变化（含水率略高或接近于平衡含水率）,而这一阶段的改变结果对器物将是毁灭性的;为了避免出土器物在短期内形态发生剧变,运用生物切片、扫描电镜分析技术对木质纤维显微结构进行了观察和研究,研究结果与结构病害腐变结果相吻合。选取与糟朽器物同期考古出土的糟朽棺板木作为分析对象,分别对其化学成分、容积重、含水率以及力学性能进行了实验测试,测得糟朽木器降解损失超过50%,含水率约为10.5%,力学强度指标与正常材质相比,均有明显的下降,且相对差异较大,最大约为正常木材强度的60%。对比分析结果,得出了结论：①糟朽木器的形态与结构状况与实验生物切片分析、电镜显微结构观察和研究结果相吻合,同时材质成分、容积重与力学性能测定结果为上述分析结果提供了有力的数据支撑;②致使糟朽木器形态和结构发生改变的主要因素是胎木含水率,其值是非恒定的并随外部环境而改变,因此含水率可用于反映糟朽木器的材质特性;③纤维饱和点与平衡含水率是影响、衡量和评估糟朽木器形态与结构的两个重要的物理参数;④鉴于糟朽木器的材质特性,后期保存应尽量避免与水分的直接接触,需要严格控制其胎木的含水率,且维持恒定、稳定的保存环境,这点对后期糟朽木器的保存是非常重要的     

Experimental examination of animal trampling effects on artifact movement in dry and water saturated substrates: a test case from South India

This paper presents the motivation, procedures, and results of an experiment that examines short episodes of animal trampling in dry and water saturated substrates in South India. While horizontal artifact displacement was similar to that modeled by other trampling experiments, vertical artifact displacement in water saturated substrates was greater than any reported experiment to date. The toolstone used in this experiment, a silicious limestone, exhibited minimal damage after trampling. Artifact inclination patterning appeared to be a potentially diagnostic middle-range marker of trampling in water saturated substrates. Given the abundant number of Paleolithic sites that are located on flat, open surfaces near water-bodies, or experience monsoonal climatic regimes, we propose that future excavations should measure artifact inclination on a regular basis.     

New parameters for the characterization of diagenetic alterations and heat-induced changes of fossil bone mineral using Fourier transform infrared spectrometry

Diagenetic alteration may limit the potential use of the biogenic composition of fossil bone as a reliable source of information for dietary, environmental and climatic reconstructions. One of the key parameters used to determine the state of preservation of fossil remains is their crystallinity. This can be evaluated by means of infrared spectroscopy, measuring the “splitting factor” (IRSF). However, the crystallinity may fail to describe the extent of chemical and mineralogical changes occurring during fossilization, and cannot be used alone as a reliable indicator of biogenic signal preservation.     

“四个发展”的内涵与特征

跨跃发展、绿色发展、和谐发展和统筹发展是中共青海省委十一届六次全会上提出的,具有青海特点的科学发展模式。本文在科学表述“四个发展”之内涵与特征的基础上指出,“四个发展”的提出,对于探索欠发达地区实践发展观的成功之路,建设富裕文明和谐新青海均具有重要意义。     

Spatial and temporal dynamics of linkage strategies in Arab-Israeli water negotiations

Water issues are inherently multi-faceted and therefore water policy often involves linkages to other issues. By providing opportunities for bargaining, use of policy linkages in transboundary water negotiations can increase the possibilities of reaching agreements; however, they also involve potential political costs. While there is ample theoretical literature on the potential benefits and risks of linkages in transboundary water negotiations, there is little empirical work exploring if, how, and why linkages are implemented in practice, especially in areas of conflict, in which they have perhaps the largest potential impact. This study evaluates the rationales behind decisions to adopt or refrain from linkage strategies by examining their actual use in Arab-Israeli water negotiations. The study finds that the likelihood, scale, and scope of linkages change over time, and they depend on factors such as the political climate, the level of trust between the parties, the degree of power asymmetry between parties, and political affiliation. Other variables such as size of negotiating parties were weakly correlated with likelihood of linkages. Knowing the opportunities and limits afforded by such linkages is crucial for negotiators and policymakers who are often drawn to linkage strategies without considering their inherent risks.     

Marxist Critiques of the Developmental State and the Fetishism of National Development

The developmental state has been heavily discussed in various disciplines and across diverse political spectrums. However, the statist notion formulated by institutionalists that the developmental state is autonomous from society and therefore effective in achieving “national development” has more often been taken for granted than problematised. The statist notion of the developmental state has also been accepted and reproduced or challenged merely inadequately by Marxist critics. By analysing how and why currently available Marxist assessments of the developmental state fail to challenge statism, this article offers an alternative theory of the developmental state by drawing on both social form critique and world system analysis. It then locates the origins of statism itself in the dynamics of global capitalism, in which the totality of capitalist social relations (understood as global from its inception) are hierarchically and unevenly constituted. From this it extends Marx's critique of commodity fetishism to the question of the international (the relationship between the nation state and world market) and criticises the statist notion of the developmental state from the perspective of a critique of the fetishism of national development.