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184 results on '"Hajji R"'

1. Exploring Spatial Interaction and Visualization Paradigms for 3D Cadastral Visualization

Author

Meliana, I, Hajji, R, Shojaei, D, Meliana, I, Hajji, R, and Shojaei, D

Abstract

Effective visualization of spatial data, especially in the realm of 3D cadastral visualization, relies on the utilization of optimal interaction techniques and user interfaces for navigating complex datasets and understanding property delineations. This paper synthesizes findings from diverse studies investigating the efficacy of interaction modalities and user interfaces in 3D visualization across various domains. Drawing parallels to the broader field of 3D visualization, particularly in interaction tasks and user interface paradigms, this paper examines the potential for advancing 3D cadastral visualization systems. The study identifies fundamental interaction tasks crucial for effective 3D cadastral visualization, including object manipulation, widget manipulation, and data selection and annotation. It evaluates a range of user interfaces, from traditional input methods to emerging technologies such as gesture-based interfaces and virtual reality (VR) headsets, highlighting their respective strengths and limitations.Embracing insights from comparative analyses of immersive and non-immersive scenarios, this paper reveals significant insights into the effectiveness of immersive environments, such as virtual reality and augmented reality, in enhancing user experience and task performance for 3D cadastral visualization. Additionally, it aims to address key challenges associated with visualizing 3D cadastral data in immersive environments by proposing a comprehensive framework for evaluating the effectiveness and utility of immersive visualization for 3D cadastral purposes.

Published
2024

6. 3D CHANGE DETECTION FOR SEMI-AUTOMATIC UPDATE OF BUILDINGS IN 3D CITY MODELS.

Author

Tamort, A., Kharroubi, A., Hajji, R., and Billen, R.

Subjects
URBAN renewal, BUILDING repair, LOST architecture, DIGITAL twins, URBAN planning, POINT cloud
Abstract

Automatic update of 3D city models has become a crucial operation in the context of urban digital twins. It commonly relies on a reconstruction from ALS point clouds. However, frequent reconstructions due to a dynamic urban environment are resource-intensive and lack change information about the scene. In this paper, we present a novel framework which aims to combine an instance change detection approach based on a distance-computing algorithm, geometric features and thresholding with a building reconstruction algorithm to ensure an efficient geometric, semantic and thematic (change labeling) update of an existing 3D city model. This approach comprises three stages spanning from data preparation to the integration of change results in the updated model. First, we prepare our input data. Next, we assess the changes between the two epochs. This process involves two stages. New and lost buildings are extracted in the first, and the changed and unchanged in the other. The results of the change detection are evaluated using standard evaluation metrics. The evaluation results are encouraging considering the various sources of errors. Finally, unchanged buildings are kept in the model, while the changed and new ones are reconstructed using Geoflow3D. The final model is semantically augmented using a change attribute. Since the 3D city model undergoes an update rather than complete reconstruction, the tracking of both geometric and semantic changes of some buildings can be made possible through a versioning system. The change information can be leveraged in multiple applications like 3D cadastre, urban inventory, urban planning… [ABSTRACT FROM AUTHOR]

Published
2024
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7. HBIM AND EXTENDED REALITY FOR CULTURAL MEDIATION OF HISTORICAL HERITAGE: A REVIEW.

Author

El Barhoumi, N. and Hajji, R.

Subjects
HISTORIC sites, HISTORIC buildings, BUILDING information modeling, CULTURAL property, TECHNOLOGICAL progress
Abstract

In the realm of Cultural Heritage, emergent technologies such as HBIM (Historical Building Information Modeling) and Extended Reality (XR) are becoming instrumental in creating immersive Virtual Heritage experiences. A review of relevant literature indicates that these technologies have been utilized to build 3D HBIM models and highlight them on immersive platforms for purposes of cultural dissemination and promotion. Technological progress now accommodates the assimilation of historical data via HBIM methodology, which opens avenues for novel communication forms and the distribution of information through extended reality techniques. This, in turn, ensures cultural mediation and heritage site promotion. This study aims to present a comprehensive survey of research surrounding the application of HBIM in heritage site preservation and management. Moreover, this paper intends to provide an overview of the concepts and the role of XR within HBIM, in supporting the cultural mediation and promotion of historical heritage. This research further delineates a pathway for future endeavours concerning the integration of XR technologies within the policies of architectural and built heritage conservation and assessment. [ABSTRACT FROM AUTHOR]

Published
2024
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8. INTEGRATION OF BIM AND MOBILE AUGMENTED REALITY IN THE AECO DOMAIN

Author

Hajji, R., Kharroubi, A., Ben Brahim, Y., Bahhane, Z., and Ghazouani, A.

Subjects
Technology, Applied optics. Photonics, TA1-2040, Engineering (General). Civil engineering (General), TA1501-1820
Abstract

BIM (Building Information Modeling) is increasingly present in a wide range of applications (architecture, engineering, construction, land use planning, utility management, etc.). BIM allows better management of projects through precise planning, communication and collaboration between several stakeholders as well as facilitating the monitoring of project operations. The emergence of Augmented Reality (AR) technology allows the superposition of (2D, 3D) information directly on the physical world, so generating immersive, interactive and enriching experiences for the user. To take advantages of BIM and AR potential in the interaction and the intuitive management in AECO (Architecture, Engineering, Construction and Operation) projects, we propose a BIM-based AR workflow through an application called "EasyBIM". This latter allows access and interaction with a BIM model through functionalities for measurement, data consultation, collaboration, visualization and integration of information from sensors. The application is developed for mobile platforms (tablet, smartphone), and has as input an IFC file (Industry Foundation Classes). Promising test results show that the developed solution can be easily integrated into a BIM context for several use cases: marketing, collaboration, site monitoring, facility management, etc.

Published
2022

15. INTEGRATION OF BIM AND MOBILE AUGMENTED REALITY IN THE AECO DOMAIN.

Author

Hajji, R., Kharroubi, A., Ben Brahim, Y., Bahhane, Z., and El Ghazouani, A.

Subjects
AUGMENTED reality, FACILITY management, BUILDING information modeling, LAND use planning, MOBILE operating systems, DATA visualization
Abstract

BIM (Building Information Modeling) is increasingly present in a wide range of applications (architecture, engineering, construction, land use planning, utility management, etc.). BIM allows better management of projects through precise planning, communication and collaboration between several stakeholders as well as facilitating the monitoring of project operations. The emergence of Augmented Reality (AR) technology allows the superposition of (2D, 3D) information directly on the physical world, so generating immersive, interactive and enriching experiences for the user. To take advantages of BIM and AR potential in the interaction and the intuitive management in AECO (Architecture, Engineering, Construction and Operation) projects, we propose a BIM-based AR workflow through an application called "EasyBIM". This latter allows access and interaction with a BIM model through functionalities for measurement, data consultation, collaboration, visualization and integration of information from sensors. The application is developed for mobile platforms (tablet, smartphone), and has as input an IFC file (Industry Foundation Classes). Promising test results show that the developed solution can be easily integrated into a BIM context for several use cases: marketing, collaboration, site monitoring, facility management, etc. [ABSTRACT FROM AUTHOR]

Published
2021
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28. Design of a Broadband Amplifier for High Speed Applications

Author

Camargo, E., Virk, R.S., Hajji, R., Parker, S., and Ohnishi, H.

Subjects
ING-INF/01 Elettronica
Abstract

This paper provides comprehensive insight into the design approach followed for an amplifier dedicated to high speed base band signals. To demonstrate the methodology, an amplifier consisting of nine PHEMT cascode cells within a distributed amplifier topology was designed. The resulting frequency response is 40 GHz at the 3-dB point, and the output voltage for a 43 Gbps eye diagram is 7.3 Vpp at the chip terminal.

Published
2002

35. Les péricardites au cours de la maladie de Behçet

Author

Bellakhal, S., primary, Hamzaoui, A., additional, Hajji, R., additional, Ben Salem, T., additional, Brahem Sfaxi, A., additional, Smiti Khanfir, M., additional, Lamloum, M., additional, Ben Ghorbel, I., additional, and Houman, M.H., additional

Published
2012
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