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The ruling Sacred Union coalition controls parliament but comprises a patchwork of small parties
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DOI: 10.1108/OXAN-GA284892
ISSN: 2633-304X
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Geographic
Topical
Bushi Chen, Xunyu Zhong, Han Xie, Pengfei Peng, Huosheng Hu, Xungao Zhong and Qiang Liu
Autonomous mobile robots (AMRs) play a crucial role in industrial and service fields. The paper aims to build a LiDAR-based simultaneous localization and mapping (SLAM) system…
Abstract
Purpose
Autonomous mobile robots (AMRs) play a crucial role in industrial and service fields. The paper aims to build a LiDAR-based simultaneous localization and mapping (SLAM) system used by AMRs to overcome challenges in dynamic and changing environments.
Design/methodology/approach
This research introduces SLAM-RAMU, a lifelong SLAM system that addresses these challenges by providing precise and consistent relocalization and autonomous map updating (RAMU). During the mapping process, local odometry is obtained using iterative error state Kalman filtering, while back-end loop detection and global pose graph optimization are used for accurate trajectory correction. In addition, a fast point cloud segmentation module is incorporated to robustly distinguish between floor, walls and roof in the environment. The segmented point clouds are then used to generate a 2.5D grid map, with particular emphasis on floor detection to filter the prior map and eliminate dynamic artifacts. In the positioning process, an initial pose alignment method is designed, which combines 2D branch-and-bound search with 3D iterative closest point registration. This method ensures high accuracy even in scenes with similar characteristics. Subsequently, scan-to-map registration is performed using the segmented point cloud on the prior map. The system also includes a map updating module that takes into account historical point cloud segmentation results. It selectively incorporates or excludes new point cloud data to ensure consistent reflection of the real environment in the map.
Findings
The performance of the SLAM-RAMU system was evaluated in real-world environments and compared against state-of-the-art (SOTA) methods. The results demonstrate that SLAM-RAMU achieves higher mapping quality and relocalization accuracy and exhibits robustness against dynamic obstacles and environmental changes.
Originality/value
Compared to other SOTA methods in simulation and real environments, SLAM-RAMU showed higher mapping quality, faster initial aligning speed and higher repeated localization accuracy.
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EU: EU AI Act affirms the bloc's policy orientation
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DOI: 10.1108/OXAN-ES285853
ISSN: 2633-304X
Keywords
Geographic
Topical
INT: Anti-deepfake rules are contested despite harms
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DOI: 10.1108/OXAN-ES285421
ISSN: 2633-304X
Keywords
Geographic
Topical
What kinds of support do interstate rivals provide to domestic actors in ongoing civil wars? And how do domestic actors utilize the support they receive? This chapter answers…
Abstract
What kinds of support do interstate rivals provide to domestic actors in ongoing civil wars? And how do domestic actors utilize the support they receive? This chapter answers these questions by comparing Iranian and Saudi military and non-military (mediation, foreign aid and religious soft-power promotion) support to the Houthis and to the Government of Yemen (GoY) during the Saada wars (2004–2010) and the internationalized civil war (2015–2018). It also focuses on the processes through which the GoY and the Houthis have utilized this support for their own strategic purposes. This chapter applies a structured, focused comparison methodology and relies on data from a review of both primary and secondary sources complemented by 14 interviews. This chapter finds that there were less external interventions in the conflict in Saada than in the internationalized civil war. During the latter, a broader set of intervention strategies enabled further instrumentalization by domestic actors, which in turn contributed to the protracted nature of the conflict. This chapter contributes to the literature on interstate rivalry and third-party intervention. The framework of analysis is applicable to civil wars that experience intervention by rivals, such as Syria or Libya.
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Presidential elections were indefinitely postponed in September 2023. Prime Minister Choguel Maiga has stated that persistent insecurity means that elections are unrealistic…
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DOI: 10.1108/OXAN-DB286350
ISSN: 2633-304X
Keywords
Geographic
Topical
Tokayev has also criticised regional officials for relying excessively on budgetary funding and not doing enough to attract private capital. However, structural economic and…
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DOI: 10.1108/OXAN-DB285674
ISSN: 2633-304X
Keywords
Geographic
Topical
Reducing water supplies are an established problem in the area, and recent events highlight long-term mismanagement of the water-supply infrastructure that has allowed the…
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DOI: 10.1108/OXAN-DB285323
ISSN: 2633-304X
Keywords
Geographic
Topical
The NDP has long pushed for a national pharmacare programme, and a lack of action would provide an excuse for Singh to end the 2022 pact with the Liberals that has helped keep the…