Evaluations of diaries and GPS-enabled trackers to plot young peoples’ geographies – asking the participants what they think

Insights into the personal geographies of young people can be gained in many ways, but there is not always a focus on the effectiveness of the methodologies used, through a comparison of the different approaches, nor is there often an examination of how the participants in the study perceive the effectiveness of the research methods. Two methodologies are explored in this study: self-completion mobility diaries and the wearing of global positioning system-enabled tracking devices. The study focuses on the perceptions of the teenage school student respondents in the study (n?=?15) with relation to the user friendliness, the perceived accuracy, and the ease with which travel patterns can be recreated from the data. The participants were able to evaluate the two methodologies and to make judgements on the criteria provided. We argue that participants can contribute significantly to post-research methodological reflection.     

Deletion/Substitution/Addition (DSA) model selection algorithm applied to the study of archaeological settlement patterning

This paper introduces GIS-based statistical methods for the study of settlement patterning in an archaeological context. The main aspect is an improvement over suboptimal stepwise statistical model selection procedures, with the introduction of a Deletion/Substitution/Addition (DSA) algorithm, a systematic model selection algorithm that provides an optimal model choice. The paper also introduces the combined use of Receiving Operator Characteristic (ROC) curves, and variable ranking as key tools aimed at an understanding of settlement patterning causation. An illustrative case study is provided whereby both a purely environmental and a mixed environmental/historical model (based on settlement hierarchy considerations) are investigated.     

SEISMIC RESPONSE CONTROL OF CABLE-STAYED BRIDGE USING DIFFERENT CONTROL STRATEGIES

The goal of this research is to study the effect of cable vibration through a number of control cases of a cable-stayed bridge. In order to consider the complicated dynamic behaviour of the full-scale bridge, a three-dimensional numerical model of the MATLAB-based analysis tool has been developed by the complete simulation of the Gi-Lu bridge. The dynamic characteristics of cables in the cable-stayed bridge are verified between the field experiment and the result from numerical simulation using geometrically nonlinear beam elements in MATLAB program. Three types of control devices are selected to reduce the response of the bridge deck which includes: actuators, viscous-elastic dampers with large capacity, and base isolations. Moreover, two types of control devices, MR dampers and viscous dampers, are installed either between the deck and cables and/or between two neighbouring cables for controlling the cable vibration. A modified bi-viscous model combined with convergent rules is used to describe the behaviour of MR dampers. Finally, through evaluation criteria the control effectiveness on the cable-stayed bridge using different control strategies is examined.     

基于SEA的AGA-SVR节假日客流量预测方法研究

节假日旅游客流量由于游客在短期内大量集中于同一地点、不同节假日休假时间长短、所处季节等不同,呈现复杂非线性特征和明显季节性特点.本文提出一种基于季节指数调整(Seasonal Exponential Adjustment,SEA)的自适应遗传算法(Adaptive Genetic Algorithm,AGA)-支持向量回归 (Support Vector Regression,SVR)预测模型,即基于SEA的AGA-SVR模型,并用国内著名5A级风景区黄山2008~2012年节假日客流量数据对模型进行验证.研究结果表明,基于SEA的AGA-SVR预测模型能够准确处理节假日旅游客流量预测中的非线性和季节性问题,较AGA-SVR和GA-SVR等方法具有更高的预测精度,在旅游预测领域应用前景广阔.     

An Enhanced Finite Element Macro-Model for the Realistic Simulation of Localized Cracks in Masonry Structures: A Large-Scale Application

ABSTRACT

Finite element macro-modeling approaches are widely used for the analysis of large-scale masonry structures. Despite their efficiency, they still face two important challenges: the realistic representation of damage and a reasonable independency of the numerical results to the used discretization. In this work, the classical smeared crack approach is enhanced with a crack-tracking algorithm, originating from the analysis of localized cracking in quasi-brittle materials. The proposed algorithm is for the first time applied to a large-scale wall exhibiting multiple shear and flexural cracking. Discussion covers structural aspects, as the response of the structure under different assumptions regarding the floor rigidity, but also numerical issues, commonly overlooked in the simulation of large structures, such the mesh-dependency of the numerical results.     

面向城市基调管控的建筑群色彩感知和意义理解分析——以北京故宫建筑群为例

北京新一轮总体规划提出保护城市色彩基调。本研究认为该任务的目的是保护色彩基调对于人的文化意义，因此从新文化地理学的角度提出问题，人们对城市色彩的感知和意义理解之间是否有联系?研究以北京故宫建筑群为研究区域，运用眼动实验调查人们对色彩的感知，以结构性访谈法了解人们的色彩意义理解，目的是探究文化在感知和认知中的作用，以及眼动实验方法在反映色彩意义理解结果的可行性。结果显示色彩感知与意义理解间两者无统计上的相关性，眼动指标无法解释被试对色彩意义的理解。研究结论是被试对色彩的理解具有“整体依赖”的特点，实践性建议是具有文化认同的城市色彩可以保留，同时允许主体对城市色彩有多角度的感知和积极理解。     

Identifying Functional Regions in Australia Using Hierarchical Aggregation Techniques

This paper continues our work focused on developing a new socio-economic geography for Australia such that the chosen spatial aggregation of data is based on an analysis of economic behaviour. The underlying hypothesis is that the development of a geographical classification based on underlying economic behaviour will provide new insights into critical issues of regional performance, including unemployment differentials, the impact of industry, infrastructure and changes in local public expenditure on local labour markets. As a precursor to detailed work on the 2006 Census of Population and Housing data, we establish the proof of concept in this paper of the Intramax methodology using 2001 Journey-to-Work data from the Australian Bureau of Statistics (ABS) for the state of New South Wales. The functional regionalisation generated by the Intramax method is then tested using ABS labour force data. We compare 2001 ABS Census of Population and Housing data aggregated by the ABS labour force regions to the same data aggregated using our functional regions. The results demonstrate the potential value of this technique for the development of a new geography.     

Quantifying tomb geometries in resistivity images using watershed algorithms

Quantifying the geometries (defined here as width, height and depth of burial) of archeological structures within resistivity models produced as a result of the regularization constraints used in most inversion algorithms is difficult, especially when structures are closely spaced. Here we apply the watershed by simulated immersion method of boundary detection to smooth 2D resistivity images generated for synthetic and field data over 3D targets. The synthetic studies include a single cavity model, a model for two widely spaced cavities (spacing ? unit electrode spacing) and a model for two closely spaced cavities (spacing < unit electrode spacing). We also examine a single-cavity model where a relatively resistive overburden, common at archaeological sites in Egypt, is included. In the case of the single cavity models, the maximum error for any geometries are 18% for the model without the resistive overburden and 10% for the model where the overburden is included, whereas it increases to 24% for the widely spaced model and 40% for the closely spaced model. Despite, the higher errors in the closely spaced cavity model, application of the algorithm confirms the presence of two features, which is not ascertainable from the smooth resistivity images. Boundaries detected with the watershed algorithm are subsequently used to define a disconnect in the regularization, resulting in a markedly improved estimate of the resistivity structure (particularly for the closely spaced cavity model) in a second inversion step using the model obtained from the smoothness constraint inversion as the starting model. This revised resistivity model also results in a lower root-mean-square (rms) misfit between measured and theoretical data, and between synthetic and inverted models. We demonstrate how the method can be applied on images from the archaeological site at Qurnet Murai, Luxor City Egypt.     

The use of tracking technologies in tourism research: the first decade

The past decade has witnessed dramatic growth in the implementation of various tracking technologies in tourism studies. A thorough review of literature reveals that 45 papers were published in peer-reviewed scientific journals, comprising 40 percent of the papers published in the three leading journals on tourism scholarship. The rate of papers published annually has grown in recent years and it is clear that this novel field is further expanding. The majority of studies analyzed employed GPS, mobile positioning, Bluetooth tracking, geocoded social media, and photo databases. The studies ranged in geographical scope from individual attractions to global capacity. Based on our review, tourism research that uses tracking data can be divided into three categories: the first generation of studies focused on methodological dimensions and the potential of tracking data. The second generation made use of spatially and temporally rich data and uncovered new aspects of tourism. The third generation made use of the new data sources to challenge fundamental questions on tourism and consumer behavior. Digital tracking data have clear advantages – data are spatially and temporally precise, geographic and temporal coverage of datasets is broad, and tracking data can be supplemented using questionnaires, sensors, and other sources.     

Turquoise Mine and Artefact Correlation for Some Bronze Age Archaeological Sites in Hubei Province,China

In China, there are places that are rich in gem‐quality turquoise resources, including north‐west Hubei Province and the nearby Baihe County in Shaanxi Province, and many ancient mining sites, although the mining history remains a mystery. Based on the compositional data from reference samples of known deposits, a comparison of the major and trace element contents of archaeological turquoise may help with determination of artefact provenance. This paper discusses new evidence of provenance‐tracking of turquoise in this area, obtained from geochemical analyses using REE and other trace elements of 22 turquoises and their surrounding rock samples from six ancient mines and three archaeological sites. The results indicate that the three archaeological turquoises from the tomb of the Middle Spring and Autumn Period (580–560 bc ) and the Warring States Period (476–221 bc ) in Hubei Province were made of raw material from north‐west Hubei Province and the nearby Baihe County in Shaanxi Province. [Correction added on 29 October 2014, after first online publication: In the preceding sentence, the correct dates for the Middle Spring and Autumn Period, and the Warring States Period have been added]