3d laser scanning and modelling of the Dhow heritage for the Qatar National Museum

This is the final version of the article. Available from SPIE via the DOI in this record.Curating boats can be difficult. They are complex structures, often demanding to conserve whether in or out of the water; they are usually large, difficult to move on land, and demanding of gallery space. Communicating life on board to a visiting public in the terra firma context of a museum can be difficult. Boats in their native environment are inherently dynamic artifacts. In a museum they can be static and divorced from the maritime context that might inspire engagement. New technologies offer new approaches to these problems. 3D laser scanning and digital modeling offers museums a multifaceted means of recording, monitoring, studying and communicating watercraft in their care. In this paper we describe the application of 3D laser scanning and subsequent digital modeling. Laser scans were further developed using computer-generated imagery (CGI) modeling techniques to produce photorealistic 3D digital models for development into interactive, media-based museum displays. The scans were also used to generate 2D naval lines and orthographic drawings as a lasting curatorial record of the dhows held by the Nationa

Approcci High Tech E Low Tech Nella Documentazione di Imbarcazionitradizionali del Mar Rosso e del Golfo

This is the final version of the article. Available from CISA

Correlation between geology and concentration-volume fractal models: significance for Cu and Mo mineralized zones separation in the Kahang porphyry deposit (Central Iran)

ArticleThis study identifies the major mineralized zones including supergene enrichment and hypogene enrichment in the Kahang Cu-Mo porphyry deposit which is located in Central Iran based on subsurface data and utilization of the concentration-volume (C-V) fractal model. Additionally, a correlation between results achieved from a C-V fractal model and geological models consisting of zonation, mineralography and alteration have been conducted in order to have an accurate recognition and modification of the main mineralized zones. Log-log plots indicate five geochemical populations for Cu and Mo in the deposit which means that mineralization commences with 0.075 % and 13 ppm for Cu and Mo (as the first thresholds) respectively. The main mineralization began for Cu≥0.42 % and Mo≥100 ppm and also enriched mineralization containing Cu≥1.8 % and Mo≥645 ppm which is located in the central part of the deposit. According to the C-V model, the main Cu-Mo mineralized zones occur in the hypogene zone, especially in the central, NW and NE parts of the Kahang deposit. The supergene enrichment zone derived via the C-V model is smaller than that in the geological model and is located in the central and eastern parts of the deposit. Results analysed by the C-V fractal model certify that the interpreted zones based on the fractal model are accurate. To certify this, a logratio matrix has been employed to validate the C-V fractal model for the Cu and Mo main mineralized zones.The authors are grateful to the National Iranian Copper Industries Co. (NICICO) for their permission to have access to the Kahang deposit dataset. Additionally, the authors would like to thank Dr. A. Saad Mohammadi the former CEO of NICICO for his support. The authors would like to thank the reviewers of this paper for their comments and valuable remarks

A legacy slope failure in Penlee Quarry - a warning to others

PublishedArticlePenlee Quarry is a large quarry in West Cornwall that has been in operation since the late 1880s. It was a major producer of aggregate, but since 2003 under new ownership, quarry operations have concentrated on maintenance and preparatory works for the recovery of armourstone and the eventual construction of a marina. The western face of this quarry was excavated between the 1950s and 1970s and is akin to other legacy slopes found at several older British quarries. The slope is up to 90m in height, has little benching and has shown increasing signs of instability since 2005. Initially instability was evidenced by rockfall and more recently by serious collapses that have indicated the need for appropriate geotechnical design of a new replacement slope. This paper sets out background and historical data and then considers investigations into the underlying mechanisms and rock structures that have contributed to instability and are relevant to the design of measures to overcome the potential for future significant ground movements. Methods to remotely assess the controlling joint sets are discussed and the rationale behind the excavated solution to facilitate future workings is outlined. High, over-steep rock faces with limited, ineffective benching and excessive bench heights that may be found in some older quarries, as at Penlee, are likely to become a matter of increasing concern. In addition the potential for major air blast or flow slide phenomena needs further investigation in these legacy slopes some of which are present in Southwest England

An evaluation of the quality of metallurgical coking coal seams within the north block of Eastern Parvadeh coal deposit, Tabas, Central Iran

The aim of this study is to evaluate the quality of the metallurgical coking coal seams in the north block of Eastern Parvadeh coal deposit located in Tabas, Central Iran. Quality particulars of the main coking coal seams named as C1 and B2 , are; thickness, sulfur content and ash content, and have been evaluated by using statistical analysis and 3D modeling based on subsurface hole data including collar, orientation, lithology, stratigraphy and assay taken and analyzed from 87 drill holes. Seams were separated based on USGS (Bulletin 1450-B) and Russian (10583-72 and 7059-75) quality standards. Statistical studies reveal that the amounts of ash content and sulfur content are high considering the USGS standard. This study concludes that the C1 seam has the highest quality amongst the analyzed seams based on metallurgical quality particulars

Application of RQD-Number and RQD-Volume multifractal modelling to delineate rock mass characterisation in Kahang Cu-Mo porphyry deposit, central Iran.

Identification of rock mass properties in terms of Rock Quality Designation (RQD) plays a significant role in mine planning and design. This study aims to separate the rock mass characterisation based on RQD data analysed from 48 boreholes in Kahang Cu-Mo porphyry deposit situated in the central Iran utilising RQD-Volume (RQD-V) and RQD-Number (RQD-N) fractal models. The log-log plots for RQD-V and RQD-N models show four rock mass populations defined by RQD thresholds of 3.55, 25.12 and 89.12% and 10.47, 41.68 and 83.17% respectively which represent very poor, poor, good and excellent rocks based on Deere and Miller rock classification. The RQD-V and RQD-N models indicate that the excellent rocks are situated in the NW and central parts of this deposit however, the good rocks are located in the most parts of the deposit. The results of validation of the fractal models with the RQD block model show that the RQD-N fractal model of excellent rock quality is better than the RQD-V fractal model of the same rock quality. Correlation between results of the fractal and the geological models illustrates that the excellent rocks are associated with porphyric quartz diorite (PQD) units. The results reveal that there is a multifractal nature in rock characterisation with respect to RQD for the Kahang deposit. The proposed fractal model can be intended for the better understanding of the rock quality for purpose of determination of the final pit slope.The authors are grateful to the National Iranian Copper Industries Co. (NICICO) for their permission to have access to the Kahang deposit dataset. Additionally, the authors would like to thank Mr. Reza Esfahanipour the head of Exploration and Development Department of the NICICO for his support. The authors also are hugely thankful to the Institute of Materials, Minerals and Mining (IOM3) for its financial support in order to conduct this research

Application of fractal modeling for integration of data layers in GIS, case study: Sharafabad-Hizehjan area (NW Iran)

The aim of this study is to indicate an Au prospect utilizing fractal modelling in the Hizehjan-SharafAbad area, NW Iran, which is located in the Alborz-Azerbayjan structural zone and the Arasbaran metallogenic belt. In this study, Au geochemical anomalies, lithological layers, alteration zones, faults, vein densities and geophysical data were generated and integrated into a GIS package. Different populations of the geochemical anomalies, faults and vein densities were determined based on Concentration-Number (C-N) and Concentration-Area (C-A) fractal models [1, 2]. In addition, these layers were converted to a raster format and subsequently weighted using an Index Overlay method and fractal modelling for the subsequent identification of Au prospects. Finally, results obtained by the Index Overlay method were classified by the C-A fractal modelling. The results revealed that significant Au prospects were situated in the NW and central parts of the study area

Evaluation of automated underground mapping solutions for mining and civil engineering applications

This is the author accepted manuscript. The final version is available from SPIE via the DOI in this record.The extractive and construction industries rely heavily on accurate geospatial data to control position, location, alignment, and orientation of planned excavations. Recent advancements in the survey industry, through the use of terrestrial laser scanning, can now provide engineering teams with three-dimensional (3-D) data in unprecedented detail via georeferenced point clouds. Furthermore, equipment is now available that provides fully mobile automated mapping solutions, independent of satellite positioning, utilizing simultaneous localization and mapping. This paper evaluates the surveying capability of three fully mobile automated mapping solutions against a benchmark laser scanning survey undertaken at the underground Camborne School of Mines Test Mine facility. The study highlights that handheld automated mapping solutions, in which closed-loops can be formed, have the potential to provide quicker data collection and processing time, as well as the required accuracy for underground surveying applications. However, the automated solution was unable to produce the necessary point cloud density to identify low-angled discontinuities that may have a major safety implication, leading to potential rockfall

Approcci High Tech e Low Tech nella documentazione di imbarcazioni tradizionali del Mar Rosso e del Golfo

Il Museo Nazionale del Qatar ospita una collezione ricca e diversificata di imbarcazioni tradizionali provenienti dal Qatar, da altre regioni del Golfo e di quelle del mare Arabico in senso ampio. Si tratta della più importante collezione attualmente esistente nella regione ed è costantemente in crescita grazie alle continue nuove acquisizioni. La collezione ha lo scopo di conservare un importantissimo patrimonio culturale, oggi in via di sparizione a causa dei normali processi modernizzazione e della marginalizzazione dei saperi tradizionali in favore delle nuove tecnologie. Nel campo della costruzione navale questo passaggio si traduce nell’abbandono dell’uso del legno e delle tecniche costruttive tradizionali, in favore dell’uso della vetroresina, e con il passaggio dalle grandi imbarcazioni da trasporto costruite in legno, che fino al secolo scorso attraversavano finanche l’Oceano Indiano, alle grandi navi container. L’importanza della collezione risiede proprio nel fatto che queste imbarcazioni tradizionali riflettono i molteplici aspetti caratteristici della vita marittima della regione fino al secolo scorso: dalla pesca al traghettamento di passeggeri e merci, alla raccolta delle perle e al commercio su media e lunga distanza

Approcci High Tech e Low Tech nella documentazione di imbarcazioni tradizionali del Mar Rosso e del Golfo

Il Museo Nazionale del Qatar ospita una collezione ricca e diversificata di imbarcazioni tradizionali provenienti dal Qatar, da altre regioni del Golfo e di quelle del mare Arabico in senso ampio. Si tratta della più importante collezione attualmente esistente nella regione ed è costantemente in crescita grazie alle continue nuove acquisizioni. La collezione ha lo scopo di conservare un importantissimo patrimonio culturale, oggi in via di sparizione a causa dei normali processi modernizzazione e della marginalizzazione dei saperi tradizionali in favore delle nuove tecnologie. Nel campo della costruzione navale questo passaggio si traduce nell’abbandono dell’uso del legno e delle tecniche costruttive tradizionali, in favore dell’uso della vetroresina, e con il passaggio dalle grandi imbarcazioni da trasporto costruite in legno, che fino al secolo scorso attraversavano finanche l’Oceano Indiano, alle grandi navi container. L’importanza della collezione risiede proprio nel fatto che queste imbarcazioni tradizionali riflettono i molteplici aspetti caratteristici della vita marittima della regione fino al secolo scorso: dalla pesca al traghettamento di passeggeri e merci, alla raccolta delle perle e al commercio su media e lunga distanza