Journal articles on the topic '3D digital strategy'
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Shojaei, D., H. Olfat, M. Briffa, and A. Rajabifard. "3D DIGITAL CADASTRE JOURNEY IN VICTORIA, AUSTRALIA." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-4/W5 (October 23, 2017): 117–23. http://dx.doi.org/10.5194/isprs-annals-iv-4-w5-117-2017.
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Land development processes today have an increasing demand to access three-dimensional (3D) spatial information. Complex land development may need to have a 3D model and require some functions which are only possible using 3D data. Accordingly, the Intergovernmental Committee on Surveying and Mapping (ICSM), as a national body in Australia provides leadership, coordination and standards for surveying, mapping and national datasets has developed the Cadastre 2034 strategy in 2014. This strategy has a vision to develop a cadastral system that enables people to readily and confidently identify the location and extent of all rights, restrictions and responsibilities related to land and real property. <br><br> In 2014, the land authority in the state of Victoria, Australia, namely Land Use Victoria (LUV), has entered the challenging area of designing and implementing a 3D digital cadastre focused on providing more efficient and effective services to the land and property industry. LUV has been following the ICSM 2034 strategy which requires developing various policies, standards, infrastructures, and tools. Over the past three years, LUV has mainly focused on investigating the technical aspect of a 3D digital cadastre. This paper provides an overview of the 3D digital cadastre investigation progress in Victoria and discusses the challenges that the team faced during this journey. It also addresses the future path to develop an integrated 3D digital cadastre in Victoria.
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Karimpouli, Sadegh, and Pejman Tahmasebi. "Conditional reconstruction: An alternative strategy in digital rock physics." GEOPHYSICS 81, no. 4 (July 2016): D465—D477. http://dx.doi.org/10.1190/geo2015-0260.1.
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Digital rock physics (DRP) is a newly developed method based on imaging and digitizing of 3D pore and mineral structure of actual rock and numerically computing rock physical properties, such as permeability, elastic moduli, and formation factor. Modern high-resolution microcomputed tomography scanners are used for imaging, but these devices are not widely available, and 3D imaging is also costly and it is a time-consuming procedure. However, recent improvements of 3D reconstruction algorithms such as crosscorrelation-based simulation and, on the other side, the concept of rock physical trends have provided some new avenues in DRP. We have developed a modified work flow using higher order statistical methods. First, a high-resolution 2D image is divided into smaller subimages. Then, different stochastic subsamples are generated based on the provided 2D subimages. Eventually, various rock physical parameters are calculated. Using several subsamples allows extracting rock physical trends and better capturing the heterogeneity and variability. We implemented our work flow on two DRP benchmark data (Berea sandstone and Grosmont carbonate) and a thin-section image from the Grosmont carbonate formation. Results of realization models, pore network modeling, and autocorrelation functions for the real and reconstructed subsamples reveal the validity of the reconstructed models. Furthermore, the agreement between static and dynamic methods indicates that subsamples are representative volume elements. Average values of the subsamples’ properties follow the reference trends of the rock sample. Permeability trends pass the actual results of the benchmark samples; however, elastic moduli trends find higher values. The latter can be due to image resolution and voxel size, which are generated by imaging tools and reconstruction algorithms. According to the obtained results, this strategy can be introduced as a valid and accurate method where an alternative method for standard DRP is needed.
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Pan, Bing, Bo Wang, Dafang Wu, and Gilles Lubineau. "An efficient and accurate 3D displacements tracking strategy for digital volume correlation." Optics and Lasers in Engineering 58 (July 2014): 126–35. http://dx.doi.org/10.1016/j.optlaseng.2014.02.003.
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Masri, T., and D. R. Paudyal. "DEVELOPMENT OF 3D CADASTRE IN NEW SOUTH WALES THROUGH E-PLAN LODGEMENT." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-4-2021 (June 17, 2021): 139–46. http://dx.doi.org/10.5194/isprs-annals-v-4-2021-139-2021.
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Abstract. With rapid growth of urban environments worldwide, there is an increasing need to develop more innovative and efficient land administration systems. In Australia, various jurisdictions are currently in the process of implementing 3D cadastre to support better land administration services to the wider community. The ‘Cadastre 2034 Strategy’ published by the Intergovernmental Committee on Surveying and Mapping (ICSM) for Australia in 2014 indicates that a digital cadastre will be implemented as part of that strategy. As part of development of 3D cadastre, State of New South Wales has used the ePlan model based on LandXML for digital lodgement and validation of cadastral plans. This initiative aims to replace PDF cadastral plans with the digital format of LandXML. However, with the introduction of LandXML as the chosen formats for digital cadastral plans in NSW, there has been a significantly low level of Strata Plan digital capture and submission in LandXML format by the surveying industry. The research aims to identify the main challenges and explore a suitable method to improve the adoption of the digital format for Strata Plan submission and development of 3D cadastre in NSW. In this research paper, a mixed method research approach has been used by integrating both qualitative and quantitative data. The primary data was collected using online questionnaires and surveys of different stakeholders from government and the private surveying industry. The data allowed for the assessment of the effectiveness and implications of the digital system currently maintained by the NSW LRS (Land Registry Services). A case study was used for the creation, validation and lodgement of an existing strata plan using LandXML format. This paper demonstrates that implementation of 3D digital cadastral plans needs to be more structured in order to satisfy all stakeholders involved. More investment into the representation of complex 3D geometric models and classification for validation will improve the uptake by surveyors. The paper concludes with a discussion on the implications of the proposed strata plan implementation strategy and proposes future research within the topic of strata plan validation in NSW, Australia.
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Mönchinger, Stephan, Elisabeth Brandenburg, and Rainer Stark. "Digital vernetztes, automatisiertes 3D-Scanning mit CAD-Rückführung." ZWF Zeitschrift für wirtschaftlichen Fabrikbetrieb 115, no. 3 (March 27, 2020): 144–47. http://dx.doi.org/10.3139/104.112252.
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Pan, Jiao, Liang Li, Hiroshi Yamaguchi, Kyoko Hasegawa, Fadjar I. Thufail, Brahmantara, and Satoshi Tanaka. "Integrated High-Definition Visualization of Digital Archives for Borobudur Temple." Remote Sensing 13, no. 24 (December 10, 2021): 5024. http://dx.doi.org/10.3390/rs13245024.
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The preservation and analysis of tangible cultural heritage sites have attracted enormous interest worldwide. Recently, establishing three-dimensional (3D) digital archives has emerged as a critical strategy for the permanent preservation and digital analysis of cultural sites. For extant parts of cultural sites, 3D scanning is widely used for efficient and accurate digitization. However, in many historical sites, many parts that have been damaged or lost by natural or artificial disasters are unavailable for 3D scanning. The remaining available data sources for these destroyed parts are photos, computer-aided design (CAD) drawings, written descriptions, etc. In this paper, we achieve an integrated digital archive of a UNESCO World Heritage site, namely, the Borobudur temple, in which buried reliefs and internal foundations are not available for 3D scanning. We introduce a digitizing framework to integrate three different kinds of data sources and to create a unified point-cloud-type digital archive. This point-based integration enables us to digitally record the entire 3D structure of the target cultural heritage site. Then, the whole site is visualized by stochastic point-based rendering (SPBR) precisely and comprehensibly. The proposed framework is widely applicable to other large-scale cultural sites.
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Arribas, Veronica, and José A. Alfaro. "3D technology in fashion: from concept to consumer." Journal of Fashion Marketing and Management: An International Journal 22, no. 2 (May 14, 2018): 240–51. http://dx.doi.org/10.1108/jfmm-10-2017-0114.
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Purpose The purpose of this paper is to show how 3D digital technology can bring value to the fashion industry by analysing the specific benefits it offers along the value chain. Additionally, the authors show some of the challenges ahead identified for both software and fashion firms. Design/methodology/approach The authors present by means of a case study the experience of an haute couture designer who used 3D digital technology – in collaboration with a recognised 3D software company – for developing his first luxury footwear collection. Findings The enhancement of creativity and a better communication with suppliers are just some of the benefits identified in the case study from the use of 3D digital technology. In addition, challenges such as the development of a digital culture or the need for technology simplification are drawn from the case. Practical implications Apart from the benefits and challenges drawn from the case study, which can be useful to practitioners in this industry, the authors also identify the collaboration through which the experience took place as an interesting practice to implement as a previous step of a digital transformation strategy. Originality/value Despite the growing interest the fashion industry is showing in the use of new digital technologies, academic research on this topic is still scarce. Therefore, the case study presented in this paper adds value to the literature showing how 3D technology can help fashion from concept to consumer.
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Cho, Wan Hee. "A study on the Utilization of 3D Printing Techniques in Contemporary Jewelry." Korea Institute of Design Research Society 7, no. 4 (December 31, 2022): 430–41. http://dx.doi.org/10.46248/kidrs.2022.4.430.
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The rapid development of technology in modern society and the development of science and technology such as digital technology affect the fields of culture, industry, and art, creating new changes in various fields of life. These advances in advanced digital technology technologies have developed into a phenomenon of blurring and converging the boundaries of each genre of modern formative art within a diversified social change. In particular, 3D printing technology, which is drawing attention among digital technologies, deviates from the traditional format and influences the creation of expanded formative expressions and sophisticated and unique visual effects. This study analyzes the current status of 3D printing technology and commercialization, and studies the impact and applicability of digital technology on the contemporary jewelry area. In addition, 3D printing technologies are compared and analyzed to consider the use cases of contemporary jewelry design and working process divided into cases used in the design process, cases used directly in the production of works, and cases used for visualization of digital data. Through this, it is intended to overcome the technical limitations of contemporary Jewelry and present the possibility of expanded expression.
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Mohammed, Mazher Iqbal, Joseph Tatineni, Brenton Cadd, Greg Peart, and Ian Gibson. "Advanced auricular prosthesis development by 3D modelling and multi-material printing." KnE Engineering 2, no. 2 (February 9, 2017): 37. http://dx.doi.org/10.18502/keg.v2i2.593.
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We investigate the use of medical imaging, digital design and 3D printing technologies as a viable means of reproducing a person’s anatomy, with the intension of producing a working, patient specific prosthesis. This approach offers several advantages over traditional techniques, as data capture is non-intrusive, models can be made using quantitative methodologies, design iterations can be digitally stored for future reproduction, and additive manufacturing ensures no loss of quality when converting the digital model into a physical part. We also present a combined model segmentation with multi-material printing approach to increase the colour complexity of the final model. When combined with multi-material printing using elastic materials, our approach provides a comprehensive strategy to accurately realising mimic of both skin pigmentation and the tactile feel of human tissues. Ultimately, we believe our approach provides an innovative strategy for prosthesis production which could have considerable potential for implementation in a clinical setting.
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Universität Tübingen, Matthias Lang, Ramadan Hussein, Benjamin Glissmann, and Philippe Kluge. "Digital Documentation of the Saite Tombs in Saqqara." Studies in Digital Heritage 4, no. 1 (June 30, 2020): 16–31. http://dx.doi.org/10.14434/sdh.v4i1.27449.
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This paper focuses on the digital documentation techniques employed in the recording of a number of Saite-Persian sarcophagus-tombs in the necropolis of Saqqara (Egypt). In this paper, we discus pros and cons of different three-dimensional technologies for the documentation of a vast site as well as the process of ongoing excavation. We then delve into a discussion of the results and benefits of the employed techniques, particularly understanding the complex spatial relationships of archaeological features both aboveground and underground. Furthermore, we explain how we derive precise scaled and ortho-rectified images of all inscribed walls and objects from the recorded 3D-information in order to produce digital facsimiles. The 3D approach gives us the opportunity to create an exact digital copy of the site, and to record all stages of the excavation. The produced 3D models can be used in various virtual environments in order to give researchers and the general public the possibility to visit and to examine the site from a distance. Also, it is important to note that this paper presents a sustainable long-term data-archiving strategy, since saving the digitally-born data for future generations is an integral part of our Saqqara Saite Tombs Project.
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Yu, Hong Mei, and Zi Qi Wang. "Technology of Mobile Phone 3D Model Reconstruction Based on the Geomagic Studio." Advanced Materials Research 971-973 (June 2014): 1357–60. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.1357.
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Studied the modeling strategy and application features of rapid surfacing reconstruction system. The 3D digital model reconstruction of real mobile phone as an example, using non-contact optical 3D scanning point cloud data access to mobile phone, get the mobile phone CAD model through data processing by point stage, polygon stage and shape stage, and the various stages of the process and the target are discussed in this paper.
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Damova, Mariana. "Linked Open Data Prototype of the Historical Archive of the European Commission." Archiving Conference 2020, no. 1 (April 7, 2020): 92–97. http://dx.doi.org/10.2352/issn.2168-3204.2020.1.0.92.
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The European Cultural Heritage Strategy for the 21st century has led to an increased demand for fast, efficient and faithful 3D digitization technologies for cultural heritage artefacts. Yet, unlike the digital acquisition of cultural goods in 2D which is widely used and automated today, 3D digitization often still requires significant manual intervention, time and money. To overcome this, the authors have developed CultLab3D, the world's first fully automatic 3D mass digitization technology for collections of three-dimensional objects. 3D scanning robots such as the CultArm3D-P are specifically designed to automate the entire 3D digitization process thus allowing to capture and archive objects on a large-scale and produce highly accurate photo-realistic representations.
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Tang, Ming, Hao He, and Longkun Yu. "Real-time 3D imaging of ocean algae with crosstalk suppressed single-shot digital holographic microscopy." Biomedical Optics Express 13, no. 8 (August 1, 2022): 4455. http://dx.doi.org/10.1364/boe.463678.
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Digital holographic microscopy (DHM) has the potential to reconstruct the 3D shape of volumetric samples from a single-shot hologram in a label-free and noninvasive manner. However, the holographic reconstruction is significantly compromised by the out-of-focus image resulting from the crosstalk between refocused planes, leading to the low fidelity of the results. In this paper, we propose a crosstalk suppression algorithm-assisted 3D imaging method combined with a home built DHM system to achieve accurate 3D imaging of ocean algae using only a single hologram. As a key step in the algorithm, a hybrid edge detection strategy using gradient-based and deep learning-based methods is proposed to offer accurate boundary information for the downstream processing. With this information, the crosstalk of each refocused plane can be estimated with adjacent refocused planes. Empowered by this method, we demonstrated successful 3D imaging of six kinds of ocean algae that agree well with the ground truth; we further demonstrated that this method could achieve real-time 3D imaging of the quick swimming ocean algae in the water environment. To our knowledge, this is the first time single-shot DHM is reported in 3D imaging of ocean algae, paving the way for on-site monitoring of the ocean algae.
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Fowlkes, Jason D., Robert Winkler, Eva Mutunga, Philip D. Rack, and Harald Plank. "Simulation Informed CAD for 3D Nanoprinting." Micromachines 11, no. 1 (December 18, 2019): 8. http://dx.doi.org/10.3390/mi11010008.
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A promising 3D nanoprinting method, used to deposit nanoscale mesh style objects, is prone to non-linear distortions which limits the complexity and variety of deposit geometries. The method, focused electron beam-induced deposition (FEBID), uses a nanoscale electron probe for continuous dissociation of surface adsorbed precursor molecules which drives highly localized deposition. Three dimensional objects are deposited using a 2D digital scanning pattern—the digital beam speed controls deposition into the third, or out-of-plane dimension. Multiple computer-aided design (CAD) programs exist for FEBID mesh object definition but rely on the definition of nodes and interconnecting linear nanowires. Thus, a method is needed to prevent non-linear/bending nanowires for accurate geometric synthesis. An analytical model is derived based on simulation results, calibrated using real experiments, to ensure linear nanowire deposition to compensate for implicit beam heating that takes place during FEBID. The model subsequently compensates and informs the exposure file containing the pixel-by-pixel scanning instructions, ensuring nanowire linearity by appropriately adjusting the patterning beam speeds. The derivation of the model is presented, based on a critical mass balance revealed by simulations and the strategy used to integrate the physics-based analytical model into an existing 3D nanoprinting CAD program is overviewed.
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Phuong, Ngo Mai. "Opportunities and Challenges of Digital Transformation in Vietnam's Tourism Industry." International Journal of Economics, Business and Management Research 06, no. 12 (2022): 17–29. http://dx.doi.org/10.51505/ijebmr.2022.61202.
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Digital transformation is an opportunity and a challenge across all industries in the world as well as in Vietnam. Digital transformation in tourism is focusing on platforms and solutions for smart management of tourism activities. Smart products and services associated with digital transformation of augmented reality, virtual reality, 3D mapping. Tourism businesses in Vietnam are strongly implementing digital transformation to overcome the consequences after the Covid19 pandemic. In Vietnam, the tourism industry's opportunities in digital transformation include the implications of digital transformation strategy; effectively promote the integrated development of the industry; strongly promote the transformation and upgrading of the tourism industry. In addition, there are challenges such as the limitation of the digital transformation limit of the tourism industry; digital workforce shortage; The problem of digital infrastructure is still very difficult.
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Romero Pellitero, Pablo, Lara Delgado Anés, and José María Martín Civantos. "Digital Public Mortuary Archaeology via 3D Modelling: The Pago del Jarafi Cemetery (Granada, Spain)." AP: Online Journal in Public Archaeology 8, no. 2 (October 12, 2018): 195. http://dx.doi.org/10.23914/ap.v8i2.151.
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One of the main goals of the MEMOLA research project's open-area excavation at Pago del Jarafí (Lanteira, Granada, Spain) was to promote knowledge socialisation by means of imparting information and public participation. The site, a multi-phased rural settlement with cemeteries of different chronologies and cultural affinities, was subject to a complete 3D photogrammetric survey, a tool serving to develop virtual models both to interpret the excavation and subsequently transmit the results to the public – so as to raise their level of engagement - via social networks and websites. Burials, in particular, are features that attract the local population to the site and arouse both a demand for information and site preservation. 3D modelling of the burials is thus a digital resource bearing a high scientific and social potential when integrated in a strategy reaching beyond the technical aspects. This paper therefore considers the 3D modelling of burials as an innovative form of digital public mortuary archaeology.
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Marwanto, Aries Budi, Damar Tri Afrianto, and Nur Rahmat Ardi Chandra Dwi Atmaja. "'MONUMEN KREWENG' 3D ANIMATION VIDEO AS A VISUAL BRANDING STRATEGY FOR JURON TOURIST VILLAGE." Capture : Jurnal Seni Media Rekam 12, no. 2 (July 3, 2021): 196–206. http://dx.doi.org/10.33153/capture.v12i2.3572.
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The development of tourist destinations in this digital era focuses on using technology to develop successful tourism recovery during the pandemic era. We use this principle to develop a tourism strategy using 3D animated videos to introduce Juron Village as a tourist village. Specifically, this study analyzes the visual strategy of a 3D animation video entitled "Monumen Kreweng" using Marty Neumeier's visual branding analysis. The findings provide insight into the animated video's visual branding strategies, including differentiation, collaboration, innovation, validation, and cultivation. The differentiation is found in the work of the Kreweng monument as the focal point of attention and local wisdom, followed by validation through the use of social media platforms to solicit consumer feedback on visual branding. Finally, the cultivation concept encourages various stakeholders to participate in realizing Juron Village's tourism branding.
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Jia, Xin, Qing Zhu, Xuming Ge, Ruifeng Ma, Daiwei Zhang, and Tao Liu. "Robust Guardrail Instantiation and Trajectory Optimization of Complex Highways Based on Mobile Laser Scanning Point Clouds." Photogrammetric Engineering & Remote Sensing 89, no. 3 (March 1, 2023): 151–61. http://dx.doi.org/10.14358/pers.22-00100r2.
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As a basic asset of highways, guardrails are essential objects in the digital modeling of highways. Therefore, generating the vectorial 3D trajectory of a guardrail from mobile laser scanning (MLS) point clouds is required for real digital modeling. However, most methods limit straight-line guardrails without considering the continuity and accuracy of the guardrails in turnoff and bend areas; thus, a completed 3D trajectory of a guardrail is not available. We use RANDLA-Net for extracting guardrails as preprocessing of MLS point clouds. We perform a region growth strategy based on linear constraints to obtain correct instantiations and a forward direction. The improved Douglas– Puke algorithm is used to simplify the center points of guardrail, and the 3D trajectory of every guardrail can be vectorized using cubic spline curve fitting. The proposed approach is validated on two 3-km case data sets that can completely instantiate MLS point clouds with remarkable effects. Quantitative evaluations demonstrate that the proposed guardrail instantiation algorithm achieves an overall precision and recall of 98.80% and 97.5%, respectively. The generated 3D trajectory can provide a high-precision design standard for the 3D modeling of the guardrail and has been applied to a long highway scene.
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Hamada, Yoshitaka, Hiroyuki Gotani, Kousuke Sasaki, Yoshitaka Tanaka, Hiroshi Egawa, and Thepparat Kanchanathepsak. "Corrective Osteotomy of Malunited Diaphyseal Fractures of the Forearm Simplified Using 3-Dimensional CT Data: Proposal of Our Simple Strategy Through Case Presentation." HAND 12, no. 5 (March 8, 2017): NP95—NP98. http://dx.doi.org/10.1177/1558944717692087.
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Background: Reconstruction of malunited diaphyseal fractures of the forearm is one of the most difficult treatments due to its complicated structure. Widespread usage of Digital Imaging and Communications in Medicine (DICOM) data of 3-dimensional (3D) computed tomography (CT) and 3D printing can make estimating the true plane of the deformity easy. Methods: A 21-year-old man with limited supination due to left forearm nonunion deformity initially treated by locking plate fixation was referred to our hospital. We evaluated the deformity by superimposing the mirror image bone model of the contralateral normal bone onto a model of the affected bone and 3D real full-scale bone model. Results: The patient underwent a manual corrective osteotomy according to our planning. He had satisfactory improvement of his symptoms with no complications. Conclusions: We postulated that our simple preoperative simulation and manual osteotomy with the aid of 3D CT reconstruction and 3D real full-scale bone model fit in the clinical practice as a recent trend.
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El Saer, A., C. Stentoumis, I. Kalisperakis, and P. Nomikou. "DEVELOPING A STRATEGY FOR PRECISE 3D MODELLING OF LARGE-SCALE SCENES FOR VR." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B4-2020 (August 25, 2020): 567–74. http://dx.doi.org/10.5194/isprs-archives-xliii-b4-2020-567-2020.
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Abstract. In this work, we present a methodology for precise 3D modelling and multi-source geospatial data blending for the purposes of Virtual Reality immersive and interactive experiences. We evaluate it on the volcanic island of Santorini due to its formidable geological terrain and the interest it poses for scientific and touristic purposes. The methodology developed here consists of three main steps. Initially, bathymetric and SRTM data are scaled down to match the smallest resolution of our dataset (LIDAR). Afterwards, the resulted elevations are combined based on the slope of the relief, while considering a buffer area to enforce a smoother terrain. As a final step, the orthophotos are combined with the estimated Digital Terrain Model, via applying a nearest neighbour matching schema leading to the final terrain background. In addition to this, both onshore and offshore points-of-interest were modelled via image-based 3D reconstruction and added to the virtual scene. The overall geospatial data that need to be visualized in applications demanding photo-textured hyper-realistic models pose a significant challenge. The 3D models are treated via a mesh optimization workflow, suitable for efficient and fast visualization in virtual reality engines, through mesh simplification, physically based rendering texture maps baking, and level-of-details.
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Tao, Guangming, Joshua J. Kaufman, Soroush Shabahang, Roxana Rezvani Naraghi, Sergey V. Sukhov, John D. Joannopoulos, Yoel Fink, Aristide Dogariu, and Ayman F. Abouraddy. "Digital design of multimaterial photonic particles." Proceedings of the National Academy of Sciences 113, no. 25 (June 6, 2016): 6839–44. http://dx.doi.org/10.1073/pnas.1601777113.
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Scattering of light from dielectric particles whose size is on the order of an optical wavelength underlies a plethora of visual phenomena in nature and is a foundation for optical coatings and paints. Tailoring the internal nanoscale geometry of such “photonic particles” allows tuning their optical scattering characteristics beyond those afforded by their constitutive materials—however, flexible yet scalable processing approaches to produce such particles are lacking. Here, we show that a thermally induced in-fiber fluid instability permits the “digital design” of multimaterial photonic particles: the precise allocation of high refractive-index contrast materials at independently addressable radial and azimuthal coordinates within its 3D architecture. Exploiting this unique capability in all-dielectric systems, we tune the scattering cross-section of equisized particles via radial structuring and induce polarization-sensitive scattering from spherical particles with broken internal rotational symmetry. The scalability of this fabrication strategy promises a generation of optical coatings in which sophisticated functionality is realized at the level of the individual particles.
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Bouarara, Hadj Ahmed, Reda Mohamed Hamou, and Abdelmalek Amine. "Clustering of Human Gestures Images Using 3D Cellular Automata and N-Gram Pixels with a Visualisation aspect." International Journal of Organizational and Collective Intelligence 5, no. 4 (October 2015): 35–60. http://dx.doi.org/10.4018/ijoci.2015100104.
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With the coming of cyberspace and the development of communication tools such as social networks. Now, the digital society is enriched continually by new content, especially the human images, which represent more than 50% of the information existed in the web. Hence, the necessity of an effective instrument for the automatic classification of this gigantic imagery base has become primordial. The content of our work, is a novel approach called clustering of Human Gesture Images using 3D cellular automaton, consists of 4 steps: Image vectoring using new image representation technique called n-gram pixels, and a normalised term frequency as weighting to calculate the importance of each term in the image. Our clustering strategy are based on the principle of 3D-CA, using a set of properties (transition function, and the 3D Moore neighbourhood). The experimentation using the dataset MuHAVi and a variety of validation measures. The performance of our approach were compared to the conventional methods in term of, representation (naive representation), and clustering strategy (kmeans).
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De Marco, R., and S. Parrinello. "MANAGEMENT OF MESH FEATURES IN 3D REALITY-BASED POLYGONAL MODELS TO SUPPORT NON-INVASIVE STRUCTURAL DIAGNOSIS AND EMERGENCY ANALYSIS IN THE CONTEXT OF EARTHQUAKE HERITAGE IN ITALY." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVI-M-1-2021 (August 28, 2021): 173–80. http://dx.doi.org/10.5194/isprs-archives-xlvi-m-1-2021-173-2021.
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Abstract. In the context of non-invasive documentation for the prevention of built heritage, digital surveying and the development of 3D models are widely applied. They have highlighted, with increasing reliability, the opportunities for knowledge and mapping on emerging damages related to safety and structural integrity. However, these processes can reach high-quality results on morphological structural detail, useful as source data for static analysis on the built structures. In this way, 3D models serve as source data for preliminary diagnostics on the causes of drift and deformation mechanisms.The research aims to validate the proposed strategy on the case study of a masonry historical building damaged by the 2016 earthquake in Central Italy, to configure the mesh modeling strategy as a scientific example capable of orienting 3D modeling practices for structural non-invasive diagnosis, also in emergency requirements of intervention. The analysis of the damage mechanisms was performed by exploiting the morphological detail of the virtual surfaces to operate a direct segmentation, automated through the recognition of Feature Regions entities. It was based on the collaboration among professionals and technicians of the Emergency Support Department of EUCENTRE and DAda-LAB researchers of University of Pavia, to evaluate appropriate procedures of digital documentation for on-site survey in sites affected by emergency conditions of post-earthquake damage.
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Abonyi, George, and David Abonyi. "Appropriate Innovation for Asian Emerging Markets in a Digital World: A Strategic Framework." Theory, Methodology, Practice 18, no. 1 (2022): 3–21. http://dx.doi.org/10.18096/tmp.2022.01.01.
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Growth in spending in Asian emerging economies will be driven to a large extent by lower-middle income and lower-income households. They constitute a vast “2nd tier” underserved market, much of it located in smaller cities, towns, and rural areas. This study develops a framework for appropriate innovation strategy aimed at this substantial market. We identify key relevant characteristics of the leading Asian emerging economies of ASEAN, China and India; that often do not get sufficient attention. The proposed strategic framework then builds on selected examples of appropriate innovation; incorporates the potentially important role of unconventional partnership between business and social enterprise for this market; and develops the supporting role of digital technology, in particular, additive manufacturing (3D printing). We conclude by presenting policy implications of an appropriate innovation strategy, involving government-business collaboration.
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Sun, Cong, Haibo Liu, Yang Shang, Shengyi Chen, and Qifeng Yu. "Scheimpflug Camera-Based Stereo-Digital Image Correlation for Full-Field 3D Deformation Measurement." Journal of Sensors 2019 (December 17, 2019): 1–11. http://dx.doi.org/10.1155/2019/5391827.
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To further extend the scope of stereo-digital image correlation (stereo-DIC) to more challenging environments, a novel Scheimpflug camera-based stereo-DIC is developed for full-field 3D deformation measurement, wherein the Scheimpflug condition, consisting of tilting the sensor plane with respect to the lens plane for the sake of larger depth of field (DOF) of the camera, is employed. The geometric imaging model of the Scheimpflug camera is described, on the basis of which a robust and effective stepwise calibration strategy is performed to calculate the intrinsic and extrinsic parameters of the stereo Scheimpflug rig. With the aid of a specially tailored stereo triangulation method and well-developed subset-based DIC algorithms, the three-dimensional shape and displacement of the specimen can be retrieved. Finally, practical experiments, including rigid motion tests and three-point bending tests, demonstrate the effectiveness and accuracy of the proposed approach.
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Briñez-De-Leon, Juan-Carlos, Mateo Rico-Garcia, and Alejandro Restrepo-Martínez. "Isochromatic-Art: A Computational Dataset for Digital Photoelasticity Studies." Data 7, no. 11 (November 1, 2022): 151. http://dx.doi.org/10.3390/data7110151.
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The importance of evaluating the stress field of loaded structures lies in the need for identifying the forces which make them fail, redesigning their geometry to increase the mechanical resistance, or characterizing unstressed regions to remove material. In such work line, digital photoelasticity highlights with the possibility of revealing the stress information through isochromatic color fringes, and quantifying it through inverse problem strategies. However, the absence of public data with a high variety of spatial fringe distribution has limited developing new proposals which generalize the stress evaluation in a wider variety of industrial applications. This dataset shares a variated collection of stress maps and their respective representation in color fringe patterns. In this case, the data were generated following a computational strategy that emulates the circular polariscope in dark field, but assuming stress surfaces and patches derived from analytical stress models, 3D reconstructions, saliency maps, and superpositions of Gaussian surfaces. In total, two sets of ‘101430’ raw images were separately generated for stress maps and isochromatic color fringes, respectively. This dataset can be valuable for researchers interested in characterizing the mechanical response in loaded models, engineers in computer science interested in modeling inverse problems, and scientists who work in physical phenomena such as 3D reconstruction in visible light, bubble analysis, oil surfaces, and film thickness.
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Patrucco, G., S. Perri, G. Sammartano, E. Fillia, I. Matteini, E. Lenticchia, R. Ceravolo, and A. Spanò. "3D MODELS AND NON-DESTRUCTIVE INVESTIGATIONS: TOWARDS A MEETING IN DIGITAL TWINS." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2022 (May 30, 2022): 845–52. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2022-845-2022.
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Abstract. The digitisation projects of architectural heritage are a field of research continuously evolving and updating in parallel to technological innovations that allow to progressively boost the challenges and requirements of geometric and semantic richness of the related digital configuration of results. Among the arduous tasks under observation, there is the increasing need to harmonize and make the spatial and heterogenous information aspects cooperating. This paper focuses on the procedures for structuring an information system based on the as-built modelling strategy applied on a particularly relevant example of reinforced concrete architecture, which presents the bearing structure of the structural elements featured by complex geometries and roofing conceived as ferrocement wavy elements and therefore equally unusual as a construction system. The entire project refers to a conservation plan that involves structural non-destructive investigations that inquiry the state of health of the structures and their seismic performance. The purpose is to structure a parametric system, based on HBIM technology, which enables the archiving of investigations and results in order to strengthen direct spatial reference between geometric elements and structural analysis results, based also on image and range-based surface analyses, in the direction of a digital twin of the architectural complex.
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Jalali, Ali, Visish M. Srinivasan, Ponraj Chinnadurai, Peter Kan, Adam Arthur, and Edward A. M. Duckworth. "Two-color 3D–3D fusion of selective rotational cerebral angiograms: a novel approach to imaging in cerebrovascular neurosurgery." Journal of NeuroInterventional Surgery 8, no. 10 (November 16, 2015): 1056–60. http://dx.doi.org/10.1136/neurintsurg-2015-011963.
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BackgroundSince its introduction, digital subtraction angiography has been considered the gold standard in diagnostic imaging for neurovascular disease. Modern post-processing techniques have made angiography even more informative to the cerebrovascular neurosurgeon or neurointerventionalist. Open neurosurgical procedures such as aneurysm clipping, extirpation of arteriovenous malformations, and extracranial–intracranial bypass remain important techniques in the armamentarium of a comprehensive cerebrovascular neurosurgeon. In-depth study of the anatomy of vascular pathology prior to and after surgery, often via selective cerebral angiography, is a critical component of surgical planning. However, when a vascular lesion or relevant anatomical region is perfused by two or more vascular territories, each selective angiographic imaging volume may provide an incomplete anatomical picture.MethodsAn institutional database was searched for cases in which the syngo Inspace 3D–3D fusion software was used and assisted in diagnosis and surgical management.ResultsIn the six cases reviewed, the 3D–3D fusion imaging was crucial in understanding the anatomy of the vascular lesion and aided in surgical decision-making. The cases included two unique anterior communicating artery aneurysms, an arteriovenous malformation, an extracranial–intracranial bypass, and an angiographically negative subarachnoid hemorrhage.ConclusionsThis is a novel strategy of combining two independently acquired selective cerebral angiography volumes to create a more accurate representation of the vascular anatomy. Given the increasing availability of the relevant image acquisition and processing technologies, we propose this strategy as a valuable adjunct in cerebrovascular procedures.
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Zhang, Xiayu, Fukang Liu, Beibei Du, Rongjuan Huang, Simin Zhang, Yunfei He, Hailan Wang, et al. "Construction of Photoresponsive 3D Structures Based on Triphenylethylene Photochromic Building Blocks." Research 2022 (September 5, 2022): 1–10. http://dx.doi.org/10.34133/2022/9834140.
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Photoresponsive materials have been widely used in sensing, bioimaging, molecular switches, information storage, and encryption nowadays. Although a large amount of photoresponsive materials have been reported, the construction of these smart materials into precisely prescribed complex 3D geometries is rarely studied. Here we designed a novel photoresponsive material methyl methacrylate containing triphenylethylene (TrPEF2-MA) that can be directly used for digital light processing (DLP) 3D printing. Based on TrPEF2-MA, a series of photoresponsive 3D structures with reversible color switching under ultraviolet/visible light irradiations were fabricated. These complex photoresponsive 3D structures show high resolutions (50 μm), excellent repeatability (25 cycles without fatigue), and tunable saturate color degrees. Multicomponent DLP 3D printing processes were also carried out to demonstrate their great properties in information hiding and information-carrying properties. This design strategy for constructing photoresponsive 3D structures is attractive in the area of adaptive camouflage, information hiding, information storage, and flexible electronics.
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Zhao, Di, Haijun Su, Kehui Hu, Zhigang Lu, Xiang Li, Dong Dong, Yuan Liu, et al. "Formation mechanism and controlling strategy of lamellar structure in 3D printed alumina ceramics by digital light processing." Additive Manufacturing 52 (April 2022): 102650. http://dx.doi.org/10.1016/j.addma.2022.102650.
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Scianna, A., G. F. Gaglio, and M. La Guardia. "DIGITAL PHOTOGRAMMETRY, TLS SURVEY AND 3D MODELLING FOR VR AND AR APPLICATIONS IN CH." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2020 (August 12, 2020): 901–9. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2020-901-2020.
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Abstract. The world of valorization of Cultural Heritage is even more focused on the virtual representation and reconstructions of digital 3D models of monuments and archaeological sites. In this scenario the quality and the performances offered by the virtual reality (VR) and augmented reality (AR) navigation take primary importance, improving the accessibility of cultural sites where the real access is not allowed for natural conditions or human possibilities. The creation of a virtual environment useful for these purposes requires a specific workflow to follow, combining different strategies in the fields of survey, 3D modelling and virtual navigation. In this work a specific case of study has been analyzed as a practical example, the church of ‘San Giorgio dei Genovesi’, settled in the Historic Centre of Palermo (Italy). The acquisition of geometric information has been obtained with the integration of Terrestrial Laser Scanner (TLS) technologies and the photogrammetric reconstruction from mini Unmanned Aerial Vehicle (UAV) equipment. The obtained point cloud has been georeferred considering a network of Ground Control Points (GCP) acquired by a Global Navigation Satellite System (GNSS) receiver. The final point cloud has been processed and properly simplified through 3D modelling procedures, to obtain a realistic and light 3D model reconstruction. The model has hence employed into a VR WEB navigation system and will be used for AR outdoor application in the future, allowing to obtain different solutions for empowering the accessibility of the cultural good. The strategy of 3D CH model reconstruction, followed in this work, could be considered a reference methodology for the development of VR gaming applications finalized to CH valorization and AR applications, applied to museums or touristic paths in historical centres.
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Ishibashi, Toshihiro, Fumiaki Maruyama, Issei Kan, Tohru sano, and Yuichi Murayama. "Four-dimensional digital subtraction angiography for exploration of intraosseous arteriovenous fistula in the sphenoid bone." Surgical Neurology International 12 (March 2, 2021): 85. http://dx.doi.org/10.25259/sni_858_2020.
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Background: Intraosseous arteriovenous fistula (AVF) is a rare clinical entity that typically presents with symptoms from their effect on surrounding structures. Here, we report a case of intraosseous AVF in the sphenoid bone that presented with bilateral abducens palsy. Case Description: A previously healthy man presented with tinnitus for 1 month, and initial imaging suspected dural AVF of the cavernous sinus. Four-dimensional digital subtraction angiography (4D-DSA) imaging and a three-dimensional (3D) fused image from the bilateral external carotid arteries revealed that the shunt was in a large venous pouch within the sphenoid bone that was treated through transvenous coil embolization. His symptoms improved the day after surgery. Conclusion: This is a case presentation of intraosseous AVF in the sphenoid bone and highlights the importance of 4D-DSA and 3D fused images for planning the treatment strategy.
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Sandersen, Peter B. E., Thomas Vangkilde-Pedersen, Flemming Jørgensen, Richard Thomsen, Jørgen Tulstrup, and Johnny Fredericia. "Towards a national 3D geological model of Denmark." Geological Survey of Denmark and Greenland (GEUS) Bulletin 35 (July 15, 2016): 27–30. http://dx.doi.org/10.34194/geusb.v35.4900.
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As part of its strategy, the Geological Survey of Denmark and Greenland (GEUS) is to develop a national, digital 3D geological model of Denmark that can act as a publicly accessible database representing the current, overall interpretation of the subsurface geology. A national model should be under constant development, focusing on meeting the current demands from society. The constant improvements in computer capacity and software capabilities have led to a growing demand for advanced geological models and 3D maps that meet the current technical standards (Berg et al. 2011). As a consequence, the users expect solutions to still more complicated and sophisticated problems related to the subsurface. GEUS has a long tradition of making 2D maps of subsurface layer boundaries and near-surface geology (Fredericia & Gravesen 2014), but in the change from 2D to 3D and when combining data in new ways, new geological knowledge is gained and new challenges of both technical and organisational character will arise. The purpose of this paper is to present the strategy for the national 3D geological model of Denmark and the planned activities for the years ahead. The paper will also reflect on some of the challenges related to making and maintaining a nationwide 3D model. Initially, the model will only include the Danish onshore areas, with the Danish offshore areas and Greenland to be added later using a similar general setup.
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Hansen, Alexandria K., Taylor R. Langdon, Lukyon W. Mendrin, Kaylin Peters, Jose Ramos, and David D. Lent. "Exploring the Potential of 3D-printing in Biological Education: A Review of the Literature." Integrative and Comparative Biology 60, no. 4 (July 10, 2020): 896–905. http://dx.doi.org/10.1093/icb/icaa100.
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Synopsis Science education is most effective when it provides authentic experiences that reflect professional practices and approaches that address issues relevant to students’ lives and communities. Such educational experiences are becoming increasingly interdisciplinary and can be enhanced using digital fabrication. Digital fabrication is the process of designing objects for the purpose of fabricating with machinery such as 3D-printers, laser cutters, and Computer Numerical Control (CNC) machines. Historically, these types of tools have been exceptionally costly and difficult to access; however, recent advancements in technological design have been accompanied by decreasing prices. In this review, we first establish the historical and theoretical foundations that support the use of digital fabrication as a pedagogical strategy to enhance learning. We specifically chose to focus attention on 3D-printing because this type of technology is becoming increasingly advanced, affordable, and widely available. We systematically reviewed the last 20 years of literature that characterized the use of 3D-printing in biological education, only finding a total of 13 articles that attempted to investigate the benefits for student learning. While the pedagogical value of student-driven creation is strongly supported by educational literature, it was challenging to make broad claims about student learning in relation to using or creating 3D-printed models in the context of biological education. Additional studies are needed to systematically investigate the impact of student-driven creation at the intersection of biology and engineering or computer science education.
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Matsubara, Noriaki, Shigeru Miyachi, Takashi Izumi, Tomotaka Ohshima, Arihito Tsurumi, Osamu Hososhima, Takeshi Kinkori, and Jun Yoshida. "Usefulness of three-dimensional digital subtraction angiography in endovascular treatment of a spinal dural arteriovenous fistula." Journal of Neurosurgery: Spine 8, no. 5 (May 2008): 462–67. http://dx.doi.org/10.3171/spi/2008/8/5/462.
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✓The use of 3D digital subtraction (DS) angiography provides a better understanding of spinal vascular lesion architecture. The authors report on 2 cases involving a spinal dural arteriovenous fistula (DAVF) and demonstrate the usefulness of 3D DS angiography for endovascular treatment of these spinal DAVFs. In both cases, middle-aged male patients suffered from bilateral leg hypesthesia, gait disturbance, and urinary dysfunction several months before treatment. Spinal angiography revealed DAVFs that were fed by a radicular artery branching from the intercostal artery and draining veins proceeding superiorly along the perimedullary veins. Endovascular embolization was performed in both cases. Selective 3D DS angiography of the intercostal artery clearly demonstrated the tortuous course of the feeder and the relationship among the feeding artery, fistula point, and draining veins in each case. This information was very useful in selecting a working angle for manipulating the microcatheter and for glue injection. In addition, the maximum intensity projection image from rotational DS angiography data clearly showed the fistula point at the dural sleeve and feeder entering the spinal canal via the intervertebral foramen and the relationship with the bone structure. Successful obliteration of the fistulae was achieved in both cases. Selective spinal 3D DS angiography was very useful in understanding the complex spinal vascular architecture and in choosing the best working angle and therapeutic strategy for endovascular treatment of spinal DAVFs.
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Kuznetsova, G. V. "CHINA'S ROAD TO DIGITAL LEADERSHIP." International Trade and Trade Policy 7, no. 2 (June 28, 2021): 17–29. http://dx.doi.org/10.21686/2410-7395-2021-2-17-29.
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The article discusses the characteristics of China's advance to the position of the world digital leadership. The objectives of the study are the identifying of the most dynamically developing areas of digital transformation based on the integration of modern technologies, big data, artificial intelligence (AI), robotics, 3D printing, cloud technologies into supply chains for implementation in production processes. The impact of digitalization processes on the formation of a new society based on both traditional cultural values and high susceptibility to Western innovations is analyzed. There is a reversal of China's global strategy from a development model based on external factors to a wider use of internal regional reserves, which, in particular, is facilitated by the confrontation with the United States and the effect of the COVID-19 pandemic. It is concluded that achieving digital leadership in the competition with the United States for China is hardly possible in the foreseeable future. There are still insurmountable barriers on the way: the lack of economic freedoms, including in the field of using the Internet, environmental challenges that require structural restructuring of the economy, the presence of regional and social imbalances, a decline in economic growth, uncertainty in relations with the United States.
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Tournier, Hugues, Kaisheng Hu, and Shuhui Deng. "Mix of analog and digital circuitry analysis in a noisy environment." International Symposium on Microelectronics 2011, no. 1 (January 1, 2011): 000669–72. http://dx.doi.org/10.4071/isom-2011-wp1-paper3.
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High transient current from a digital circuitry, fast di/dt, within an analog circuitry co-existence is very demanding. Analysis of the diverse potential noise coupling path, and suggested solutions, is required to guarantee proper functionality and performances of both circuitries. Our noise analysis includes the die, package and PCB power supply and decoupling strategy. This analysis takes into consideration the efficiency of the power delivery Network, PDN, at a Macro and Micro environment. The analysis is using 3D Simulations techniques based on causal model. With this novel technique, we investigate the potential noise induction through the ground path and isolation. For the conclusion, we suggest a method that improve the PI analysis over a mix signal IC..
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Manfreda, Salvatore, Petr Dvorak, Jana Mullerova, Sorin Herban, Pietro Vuono, José Arranz Justel, and Matthew Perks. "Assessing the Accuracy of Digital Surface Models Derived from Optical Imagery Acquired with Unmanned Aerial Systems." Drones 3, no. 1 (January 30, 2019): 15. http://dx.doi.org/10.3390/drones3010015.
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Small unmanned aerial systems (UASs) equipped with an optical camera are a cost-effective strategy for topographic surveys. These low-cost UASs can provide useful information for three-dimensional (3D) reconstruction even if they are equipped with a low-quality navigation system. To ensure the production of high-quality topographic models, careful consideration of the flight mode and proper distribution of ground control points are required. To this end, a commercial UAS was adopted to monitor a small earthen dam using different combinations of flight configurations and by adopting a variable number of ground control points (GCPs). The results highlight that optimization of both the choice and combination of flight plans can reduce the relative error of the 3D model to within two meters without the need to include GCPs. However, the use of GCPs greatly improved the quality of the topographic survey, reducing error to the order of a few centimeters. The combined use of images extracted from two flights, one with a camera mounted at nadir and the second with a 20° angle, was found to be beneficial for increasing the overall accuracy of the 3D model and especially the vertical precision.
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Wang, Mingke, and Newman Lau. "NFT Digital Twins: A Digitalization Strategy to Preserve and Sustain Miao Silver Craftsmanship in the Metaverse Era." Heritage 6, no. 2 (February 14, 2023): 1921–41. http://dx.doi.org/10.3390/heritage6020103.
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Miao silver, generally referred to as the unique silver ornaments manufactured by the Miao ethnicity with over 400 years of history, was listed as a Chinese national intangible cultural heritage in 2006. Through primary research methods, including local investigation, interviews, and workshops at Maliao Village in Guizhou, this study found that sizeable industrial production shrank the market needs for traditional Miao silver handicrafts. A growing number of young Miao people pursue higher incomes and leave their hometowns to make a living in cities instead of engaging in Miao silver handcrafting in villages. Based on the difficulties encountered in the inheritance of Miao silver craftsmanship, this project creatively proposed a digital strategy based on the NFT digital twin application to preserve and maintain Miao silver technology in the context of the metaverse era. By conducting design experiments combining digital technology and the traditional Miao silver manufacturing techniques, a collection of NFT digital twins, digital duplications of Miao silver handicrafts that Miao silversmith jointly worked with 3D technologist, was created as a vital research outcome. The results show that this attempt is beneficial to help expand the use scenarios, extend the lifespan, and increase the commercial value of Miao silver. To sum up, taking Miao silverware handicrafts as a research case, this paper dialectically discusses the relationship between industrial manufacturing and traditional handicraft industries, making contributions to the inheritance and development of Miao silver and also putting forward innovative solutions to promote the prosperity of intangible cultural heritage worldwide.
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Klubsuwan, Katanyoo, and Surasak Mungsing. "Digital data security and hiding on virtual reality video 3D GIS." International Journal of Management Science and Engineering Management 4, no. 3 (August 2009): 163–76. http://dx.doi.org/10.1080/17509653.2009.10684575.
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Aires, Alysson Soares, Ademir Marques Junior, Daniel Capella Zanotta, André Luiz Durante Spigolon, Mauricio Roberto Veronez, and Luiz Gonzaga. "Digital Outcrop Model Generation from Hybrid UAV and Panoramic Imaging Systems." Remote Sensing 14, no. 16 (August 17, 2022): 3994. http://dx.doi.org/10.3390/rs14163994.
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The study of outcrops in geosciences is being significantly improved by the enhancement of technologies that aims to build digital outcrop models (DOMs). Usually, the virtual environment is built by a collection of partially overlapped photographs taken from diverse perspectives, frequently using unmanned aerial vehicles (UAV). However, in situations including very steep features or even sub-vertical patterns, incomplete coverage of objects is expected. This work proposes an integration framework that uses terrestrial spherical panoramic images (SPI), acquired by omnidirectional fusion camera, and a UAV survey to overcome gaps left by traditional mapping in complex natural structures, such as outcrops. The omnidirectional fusion camera produces wider field of view images from different perspectives, which are able to considerably improve the representation of the DOM, mainly where the UAV has geometric view restrictions. We designed controlled experiments to guarantee the equivalent performance of SPI compared with UAV. The adaptive integration is accomplished through an optimized selective strategy based on an octree framework. The quality of the 3D model generated using this approach was assessed by quantitative and qualitative indicators. The results show the potential of generating a more reliable 3D model using SPI allied with UAV image data while reducing field survey time and complexity.
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Yang, Xiao, Juntong Xi, Jingyu Liu, and Xiaobo Chen. "Infrared Laser Speckle Projection-Based Multi-Sensor Collaborative Human Body Automatic Scanning System." Machines 9, no. 11 (November 22, 2021): 299. http://dx.doi.org/10.3390/machines9110299.
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Human body scanning is an important means to build a digital 3D model of the human body, which is the basis for intelligent clothing production, human obesity analysis, and medical plastic surgery applications, etc. Comparing to commonly used optical scanning technologies such as laser scanning and fringe structured light, infrared laser speckle projection-based 3D scanning technology has the advantages of single-shot, simple control, and avoiding light stimulation to human eyes. In this paper, a multi-sensor collaborative digital human body scanning system based on near-infrared laser speckle projection is proposed, which occupies less than 2 m2 and has a scanning period of about 60 s. Additionally, the system calibration method and control scheme are proposed for the scanning system, and the serial-parallel computing strategy is developed based on the unified computing equipment architecture (CUDA), so as to realize the rapid calculation and automatic registration of local point cloud data. Finally, the effectiveness and time efficiency of the system are evaluated through anthropometric experiments.
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Roberts, James, and Duncan Slater. "Miniature UAVs and Photogrammetry—A Novel Approach to Collecting Aerial Inspection Data from Mature Broadleaf Trees." Arboriculture & Urban Forestry 49, no. 2 (March 1, 2023): 75–89. http://dx.doi.org/10.48044/jauf.2023.007.
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Background: Production of high-quality 3D models of trees has a practical application in arboriculture, allowing the assessment, measurement, and recording of aboveground structural features of individual trees. Commercially available hobby UAVs (uncrewed aerial vehicles) with integrated cameras in combination with a low-cost photogrammetry software package can produce high-definition 3D models of tree structures with low financial investment. Methods: Our study compared an established orbital flight strategy and 2 novel close-range flight strategies for collecting digital imagery to produce 3D models of features of interest (FOIs) in trees. We used 3 separate tests to establish if these different flight strategies resulted in reliable, measurable, and complete models for FOIs in mature broadleaf trees. Results: Our study substantiated the findings of previous studies, in that a well-planned, automated orbital strategy of flight can render full models of trees from which accurate measurement of dimensions can be obtained. A flight strategy involving collecting clusters of images from different angles whilst the UAV stayed in one location was trialled, and the resulting models were typically incomplete and of low quality. However, the second close-range strategy of hand-flown missions running parallel with the FOI yielded highly detailed, complete models from which observations of the FOI’s surface and accurate measurements of its dimensions could be obtained. Conclusions: We conclude that there are substantial opportunities for the use of low-cost UAVs to undertake visual tree assessments of the aerial parts of trees, subject to ease of access to the feature and the right choice of flight strategy.
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Beltagui, Ahmad, Ainurul Rosli, and Marina Candi. "Exaptation in a digital innovation ecosystem: The disruptive impacts of 3D printing." Research Policy 49, no. 1 (February 2020): 103833. http://dx.doi.org/10.1016/j.respol.2019.103833.
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Vorontsova, Yu V., and V. N. Baranov. "Transversal applying of the digitalization strategy." E-Management 2, no. 4 (February 5, 2020): 85–91. http://dx.doi.org/10.26425/2658-3445-2019-4-85-91.
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A brief overview of the possibility and readiness for digitalization of automotive industry companies has been presented. Since production processes and systems can be more intelligent, they allow to reach the high-quality standards required in service, what is the only way to maximize the improvement of its components from the very beginning of the process.Digitalization is one of the main levers to enhance business and increase competitiveness in the industry, that provides huge opportunities in the future. One of the important conditions is increase flexibility, that allows quickly to adapt production facilities and processes to changes in production and product lines of customer. The digitalization strategy should be applied transversely to all processes, starting from production, logistics, and quality till design, procurement, human resources, or finance. Transversal applying of digitalization strategy is possible in the creation of technology centers graphic engineering worldwide, the use of computerized simulation, CAD systems and virtual 3D environments for research, analysis, evaluation, validation and improvement of production processes. The important aspect to form the future is the development of innovative solutions that contribute turning new concepts into an industrial reality.The revolution in logistics digitalization gives automakers and service providers the opportunity to stay flexible and to be ahead of time. The main transformers are data and digital rethinking of the supply chain, that contribute a significant growth in trade. Advanced automakers create a digital workforce and program robots to solve repetitive tasks. All this provides full flexibility in software development with integrated in it robot’s hardware, fast iterations and adjustments, when it is necessary, which might not have been easily achieved using traditional methods. These projects can be extended to ones with greater investment. Mainly, more flexible and service-oriented solutions can be implemented as a response to speed and automation in logistics. Thereby, it is possible to satisfy the changing and demanding needs of customers now and in the future.
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Sofic, Aleksandar, Slavko Rakic, Giuditta Pezzotta, Branko Markoski, Veronica Arioli, and Ugljesa Marjanovic. "Smart and Resilient Transformation of Manufacturing Firms." Processes 10, no. 12 (December 12, 2022): 2674. http://dx.doi.org/10.3390/pr10122674.
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The smart and resilient transformation of manufacturing firms has flourished in the last decade. This paper investigates the smart and resilient transformation of manufacturing firms with the application of digital services. It uses a Serbian data set of 136 manufacturing firms from the Digital Servitization Survey from 2022 coordinated by IFIP WG5.7. The authors applied a different method approach through social network analysis, correlation analysis, and interviews with representatives from the manufacturing firms. The main results show that manufacturing firms that apply an adequate combination of services and digital technologies have the highest impact on the network of manufacturing firms. Moreover, the results show that applying digital technologies, such as additive manufacturing/3D printing, big data analytics, and digital twin, increases the gross annual turnover of manufacturing firms in the COVID-19 era. Finally, the results show that for a successful smart and resilient transformation, manufacturing firms need to develop a strategy and motivation oriented to profit to be resilient enough to withstand market change.
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Li, Yiyan, Hemanth Cherukury, Louai Labanieh, Weian Zhao, and Dong-Ku Kang. "Rapid Detection of β-Lactamase-Producing Bacteria Using the Integrated Comprehensive Droplet Digital Detection (IC 3D) System." Sensors 20, no. 17 (August 19, 2020): 4667. http://dx.doi.org/10.3390/s20174667.
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Antibiotic-resistant bacteria have emerged as an imminent global threat. The lack of rapid and sensitive diagnostic techniques leaves health care providers with inadequate resources for guiding therapy and risks the lives of patients. The traditional plate culturing methods for identifying antibiotic-resistant bacteria is laborious and time-consuming. Bulk PCR (Polymerase Chain Reaction) and qPCR are limited by poor detection sensitivity, which is critical for the early-stage detection of bloodstream infections. In this study, we introduce a technique for detecting β-lactamase-producing bacteria at single-cell sensitivity based on a commercial β-lactamase sensor (Fluorocillin), droplet microfluidics, and a custom 3D particle counter. Bacteria-containing samples were encapsulated within picoliter-sized droplets at the single-cell level and cultured within water-in-oil droplets containing antibiotics and the Fluorocillin sensor. Then, fluorescent droplets were digitally quantified with the 3D particle counter, which is capable of analyzing milliliter-scale volumes of collected droplets within 10 min. The fluorescence signal from single-colony droplets was detectable in less than 5 h, and the 3D scanning was performed in less than 10 min, which was significantly faster than conventional culture-based methods. In this approach, the limit of detection achieved was about 10 bacterial cells per mL of sample, and the turnaround time from sample to result was less than 6 h. This study demonstrates a promising strategy for the detection of β-lactamase-producing bacteria using the recently developed IC 3D system.
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Jin, Jiongchao, Huanqiang Xu, and Biao Leng. "Adaptive Points Sampling for Implicit Field Reconstruction of Industrial Digital Twin." Sensors 22, no. 17 (September 2, 2022): 6630. http://dx.doi.org/10.3390/s22176630.
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Nowadays, the digital twin (DT) plays an important role in Industry 4.0. It aims to model reality in the digital space for further industrial maintenance, management, and optimization. Previously, many AI technologies have been applied in this field and provide strong tools to connect physical and virtual spaces. However, we found that single-view 3D reconstruction (SVR) for DT has not been thoroughly studied. SVR can generate 3D digital models of real industrial products from just a single image. The application of SVR technology would bring convenience, cheapness, and robustness to modeling physical objects in digital space. However, the existing SVR methods cannot perform well in the reconstruction of details, which is indispensable and challenging in industrial products. In this paper, we propose a new detail-aware feature extraction network based on a feature pyramid network (FPN) for better detail reconstruction. Then, an extra network is designed to combine convolutional feature maps from different levels. Moreover, we also propose a novel adaptive points-sampling strategy to adaptively change the learning difficulty according to the training status. This can accelerate the training process and improve the fine-tuned network performance as well. Finally, we conduct comprehensive experiments on both the general objects dataset ShapeNet and a collected industrial dataset to prove the effectiveness of our methods and the practicability of the SVR technology for DT.
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Hidajat, Stobbe, Griesshaber, Schroder, and Felix. "Portal vein thrombosis: etiology, diagnostic strategy, therapy and management." Vasa 34, no. 2 (May 1, 2005): 81–92. http://dx.doi.org/10.1024/0301-1526.34.2.81.
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Myeloproliferative disorder, liver cirrhosis with portal hypertension, deficiency of natural anticoagulant proteins, gene mutation and hepatocellular carcinoma are the most frequent causes of portal vein thrombosis (PVT). Higher accuracy of the diagnostic methods is the reason why today the cause of PVT can be found more frequently. With imaging methods, PVT with or without cavernous transformation can be diagnosed. Fresh thrombus can be undetected in sonography due to the low echogenity but can be recognized in color Doppler sonography, especially with contrast-enhancing agent. Contrast-enhanced 3D MR angiography allows a comparable accuracy in the detection of PVT as digital subtraction angiography. Therapeutical options of PVT consist of mechanical recanalization of the portal vein, local fibrinolysis with or without placement of transjugular intrahepatic portosystemic stent shunt (TIPS), combination of mechanical recanalization and local fibrinolysis, systemic thrombolytic therapy, anticoagulation alone and surgical thrombectomy. Once PVT is found in sonography, Doppler sonography may be performed in order to distinguish benign from malignant thrombus. If further information is needed, MR angiography or contrast enhanced CT is the next step. If these tests are unsatisfactory, digital subtraction angiography should be performed. Until the early nineties, shunt surgery was recommended in patients with PVT who bled despite endoscopic treatment. Today, in symptomatic noncavernomatous PVT, recanalization with local methods is recommended. Additional implantation of TIPS should be performed when the patient is cirrhotic. In recent PVT in non-cirrhotic patients anticoagulation alone is recommended. It is expected that in old PVT anticoagulation can prevent further extension of the thrombus.
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Vien, Benjamin Steven, Leslie Wong, Thomas Kuen, Frank Courtney, Jayantha Kodikara, and Wing Kong Chiu. "Strain Monitoring Strategy of Deformed Membrane Cover Using Unmanned Aerial Vehicle-Assisted 3D Photogrammetry." Remote Sensing 12, no. 17 (August 24, 2020): 2738. http://dx.doi.org/10.3390/rs12172738.
Full textAbstract:
Large structures and high-value assets require inspection and integrity assessment methodologies that ensure maximum availability and operational capabilities. Large membranes are used as floating covers at the anaerobic wastewater lagoons of Melbourne Water’s Western Treatment Plant (WTP). A critical function of this high-value asset pertains to the harnessing of the biogas gas generated at these lagoons as well as protecting the environment from the release of odours and greenhouse gases. Therefore, a proactive inspection and efficient management strategy are required to ensure these expensive covers’ integrity and continued operation. Not only is identifying the state of stress on the floating cover crucial for its structural integrity assessment, but the development of rapid and non-contact inspections will significantly assist in determining the “real-life” performance of the cover for superior maintenance management. This study investigates a strain determination method for WTP floating cover which integrates unmanned aerial vehicle (UAV)-assisted photogrammetry with finite element analyses to determine the structural integrity of these covers. Collective aerial images were compiled to form 3D digital models of the deformed cover specimens, which were then employed in computational and statistical analyses to assess and predict the strain of the cover. The findings complement the future implementation of UAV-assisted aerial photogrammetry for structural health assessment of the large floating covers.