现代地球动力过程的动力工程

对地壳下面现代地球动力过程的动力问题进行了讨论。对现在地壳中地震震源区的地球物理非均匀性和自然组织形成过程中空间因子的值进行了估算。     

青藏高原北部与东缘地震波特征对比及其地球物理意义

藏北与滇南均是地震多发区，甘肃台网记录的该两区地震波有明显差异。滇南地震波途经青藏高原东缘到兰州，其体波波列以短周期成分为主。短周期面波Ｌ（ｇ１）和Ｌ（ｇ２）非常显著，起始尖锐。藏北地震波途经青藏高原东北部到兰州，传播介质对地震体波的短周期部分吸收相当强，体波和面波均有一定的衰减，Ｌ（ｇ１）不明显或缺失，Ｌ（ｇ２）起始缓慢，周期长。对两区地震波的对比研究表明，由于两传播路径中的上地幔与地壳上部构造差异显著，介质密度和分层不同，对地震波的吸收也就不同，从而造成两地区地震记录上的差别。     

Not all fisheries will be collapsed in 2048

In a recently published paper, Worm et al. [Impacts of biodiversity loss on ocean ecosystem services. Science 2006;314:787–90.] project “the global collapse of all taxa currently fished” by 2048. Using their criteria and data, this paper shows that the number of not-collapsed fisheries actually increased over time to a plateau of about 5600 in 1985–2003. Furthermore, if trends are projected into the future, more than half of the world's fisheries would always be in a recovered state.     

Defining the subject of speech - Constructions of authorship in post-unification German media discourse

This paper analyses how the authority of west German media workers to produce ‘truthful’ representations about unification and eastern Germany after 1989 was discursively constructed. Rather than simply assuming the superiority of western knowledge, I show that the right of western media producers to speak for and about east Germany had to be constructed and defended discursively on a number of registers. Western journalists, in particular, had to demonstrate their credibility towards west and east German audiences, evidence their ability to report objectively and authoritatively, and prove themselves superior in the production of knowledge. Their truth claims had to be negotiated in the midst of a range of competing discourses. The complicated constitution of audiences meant that western journalists had to cast themselves in various different roles to justify their position as ‘knowing subjects’: as explorers, surveyors, observers, commentators, mediators and/or educators. The paper explores, how the divergence between these different positions was reconciled through a number of discursive strategies. I highlight the ambivalences and internal contradictions produced within journalistic discourses as well as through the existence of differentiated audiences.     

Evidence for the standard model through QSO absorption lines

I summarize the properties of the QSO absorption lines which provide evidence for the standard model of the Universe.     

Capturing the stories of corporations: A comparison of media debates on carbon capture and storage in Norway and Sweden

The development and deployment of carbon capture and storage (CCS) are sensitive to public debates that socially frame the technology. This study examines the evolving CCS debates, focusing on the media's framing of firms. Corporations are central CCS actors, and we analyze them in light of the nation-state, which has been emphasized in previous research as the primary context of CCS politics. Empirically, we compare framings of Statoil and Vattenfall in the Norwegian and Swedish media, drawing on a qualitative dataset of news media articles published between 2005 and 2009. We conclude that firms make regular media statements either to foster legitimacy or to respond to criticism of CCS. We also conclude that framing is not necessarily linked to technological success or failure and that interpretations of the technology have different forms depending on whether the related activity occurs in domestic or foreign markets. Finally, we explain the media framings based on the domestic energy situation and politics.     

Transient dynamic response of fluid-saturated soil under a moving cyclic loading

Based on the Theory of Porous Media (TPM), a mathematical model of a two-dimensional incompressible fluid-saturated elastic soil is established, and the periodic boundary conditions are presented to analyze the transient dynamic response of this soil under a moving cyclic loading. The differential quadrature method (DQM) and the second-order backward difference scheme are applied to discretize the governing equations on the spatial and temporal domains, respectively. As application, a typical two-dimensional wave-induced transient problem with a seabed of finite thickness is analyzed, and the numerical results are compared with the analytical results presented in the present work. In addition, a transient dynamic response of fluid-saturated soil under limit moving vehicle loadings is studied. The effects of the velocity of vehicle and the volume fraction on the settlement and the pore water pressure are studied.     

Observational limits on intergalactic matter

Intergalactic gas and dust are very difficult to detect. Several methods to detect intergalactic gas have been developed. The results of these methods have provided qualitative arguments and quantitative limits on the amount of intergalactic matter in the intergalactic environment. We present here arguments as to why the density of intergalactic matter is higher than previously thought possible.     

多孔介质非均质性空间变异结构分析

非均质多孔介质的空间分布具有随机性与结构性的双重性质.地统计学方法在研究具有结构性和随机性双重性变量的空间变异性方面具有极强的科学性.本文在地理信息系统平台ArcGIS上,采用Geostatistical Analyst地统计学分析模块中的kriging插值方法研究非均质性多孔介质的空间变异性.以河北省廊坊市地下水污染物的现场数据为研究对象,利用普通克立格法对氟化物、硫酸盐、氯化物和汞浓度的空间变异性进行分析.