International Journal of Geology

   
ISSN: 1998-4499
Volume 13, 2019

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 13, 2019


Title of the Paper: Urban Residential Land Price Appraisal via Quantifying Impact Factors based on Deep Belief Networks

 

Authors: Hua Ai, Qiang Liu, Yuxin Jiang, Ran Yang

Pages: 17-20

Abstract: The relationship between urban residential land prices and the explanatory variables is highly complex. This causes that it is difficult to quantify the impact factors for appraising urban residential land prices. This paper explores the use of Deep Belief Networks for quantifying impact factors of urban residential land prices. The proposed approach applies grid cells to express the samples finely 458 features are extracted as input from collected raw data of 37 important impact factors, residential land prices are divided into 9 levels as output, and both BBRBM and GBRBM are utilized to form the network. A deep belief network model is finally employed to appraise urban residential land prices via their impact factors, and the average accuracy can achieve about 90%.


Title of the Paper: Computational Mechanics Analysis of Enneper Surface in Tensioned Fabric Structures

 

Authors: Hooi Min Yee, Mohd Nasir Abdul Hadi

Pages: 13-16

Abstract: Nonlinear analysis method is one of the earliest methods proposed for form-finding analysis of tensioned fabric structures. However due to some inherent weaknesses, the method has not been fully developed. Computational strategies for form-finding analysis of tensioned fabric structure using the nonlinear analysis method has been proposed in 2011. The computational procedures based on nonlinear analysis method in combination with properly formulated computational strategies can be presented as a general tool capable of form-finding of TFS. It has the added advantage that the program used to solve the initial equilibrium problem can also be used for further stress analysis. Numerical and experimental form-finding of tensioned fabric structure in the form of Enneper minimal surface with variables u=v=0.4 and u=v=1.0 have been investigated. In this study, form-finding using nonlinear analysis method and soap film is used to determine the surface form corresponding to a boundary shape defined by the mathematical equation for Enneper minimal surface with variables u=v=0.4 and u=v=1.0. It provides an alternative choice for civil engineer to consider the Enneper minimal surface, u=v=0.4 and u=v=1.0 to be applied in tensioned fabric structure. Such in-sight will lead to improvement of rural basic infrastructure, economic gains, sustainability of built environment and green technology initiative.


Title of the Paper: Complexity of Natural Vibrations: the Case Study of a Church Bell Tower

 

Authors: Ioannis Koutalonis, Filippos Vallianatos, Margarita Moisidi, Kaliopi Chochlaki

Pages: 8-12

Abstract: The study of ambient seismic noise is one of the important scientific and practical research challenges, due to its use in a number of geophysical applications. In this work we studied the ambient vibrations of a church bell tower in varying heights above the ground. More precisely we studied the incremental fluctuations of the ambient vibrations in terms of Tsallis Entropy, in order to study the non–extensive parameter– q, it’s changes with the height along with the HVSR method which allows to estimate how the resonance frequency varies with height. We found that the q–parameter decreases with height, indicating that the complexity of oscillations and the independent variables that describe the system decreases in agreement with that obtained using the HVSR technique.


Title of the Paper: Remote Sensing and 210PB Geochronology in Sediment Profiles of the Mae D’agua Dam for Evaluation of Areas Impacted by Urbanization

 

Authors: Felippe Fernandes, Markus Fiebig, J. M.l G. Pereira Isidoro, Cristiano Poleto

Pages: 1-7

Abstract: A primary outcome of water basin urbanization is the set of changes of the natural environment into an anthropic environment, favoring the formation of residential and industrial conglomerates. Such changes lead to increases in water demand, causing higher production and release of effluents from anthropic actions, in addition to originating diffuse sources of pollution. These changes can drastically deteriorate the physicochemical characteristics of the local water resources. Due to the absence of urban planning during the last forty years, the water basin of the Mãe d’Água dam has brought to the top some environmental liabilities, such as organic and/or inorganic contaminants. In this context, the present study sought to evaluate the isotopic composition using lead 210 (210Pb) in the different sedimentary layers produced in the water basin that composes the Mãe d’Água dam. With this, it is possible to characterize and identify the urbanization process on the water basin, applying the geochronology technique. Samples were collected in June 2014, where two sediment samplings were taken both at the entrance and near the lake margin of the dam (T1 coordinates: 488716.3334; 6672912.682, and T4 coordinates: 488729.6452; 6672984.7221). A "Piston core" sediment sampler was used to extract the samples. The geochronology studies (210Pb), that date the years in which sediment deposition occurred, allowed to make an outlook of the evolutionary process of environmental degradation that the basin has been suffering from over the last four decades. This was achieved by means of multiple remote sensing devices that allowed confronting and displaying the evolution of urbanization in the studied water basin. Thus, identification of the layer’s deposition period, by combining techniques such as 210Pb geochronology and remote sensing, enables to find possible causes of sediment contribution to the reservoir , such as urban expansion, industrialization, erosion, agricultural practices. Therefore, the present study describes the impacts caused by urbanization on the Mãe d’Água water basin.