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A Survey on Socially Aware Robot Navigation: Taxonomy and Future Challenges

arXiv.org Artificial Intelligence

Socially aware robot navigation is gaining popularity with the increase in delivery and assistive robots. The research is further fueled by a need for socially aware navigation skills in autonomous vehicles to move safely and appropriately in spaces shared with humans. Although most of these are ground robots, drones are also entering the field. In this paper, we present a literature survey of the works on socially aware robot navigation in the past 10 years. We propose four different faceted taxonomies to navigate the literature and examine the field from four different perspectives. Through the taxonomic review, we discuss the current research directions and the extending scope of applications in various domains. Further, we put forward a list of current research opportunities and present a discussion on possible future challenges that are likely to emerge in the field.


Dirty secret of Israel's weapons exports: They're tested on Palestinians

Al Jazeera

Amman, Jordan – The Israeli army released footage on October 22 of its Maglan commando unit deploying a new precision-guided 120mm mortar bomb called the Iron Sting, against Hamas in Gaza. The bomb's Haifa-based manufacturer, Elbit Systems, has been advertising its qualities on the public relations page of its website since March 2021, when it was integrated into the Israeli military. Benny Gantz, then Israel's defence minister and now a part of Prime Minister Benjamin Netanyahu's war cabinet, described the Iron Sting as "designed to engage targets precisely, in both open terrains and urban environments, while reducing the possibility of collateral damage and preventing injury to non-combatants". It's a claim echoed by Mark Regev, Netanyahu's former spokesperson, for the country's overall approach to its war on Gaza, in which, he has said, Israel is "trying to be as surgical as humanly possible". Yet, more than one month after Israel launched the aerial bombardment of Gaza following a surprise Hamas attack, it has killed at least 11,400 Palestinian civilians, and injured 30,000 in the besieged strip and the occupied West Bank.


Ukraine claims gains against Russian positions on Dnipro east bank

Al Jazeera

Ukraine's armed forces claim to have made significant headway via a series of attacks on the Russian-occupied east bank of the Dnipro river. The country's Marine Corps said in a statement published on social media on Friday that it had gained "a foothold on several bridgeheads" of Dnipro, near the key southern city of Kherson. The waterway is the de facto front line in the south of Ukraine. However, Russia conceded for the first time this week that Ukrainian forces had claimed back some territory on the opposing bank. "The Defence Forces of Ukraine conducted a series of successful operations on the left bank of the Dnipro River, along the Kherson front," the marines said, and "managed to gain a foothold on several bridgeheads."


Path Planning in 3D with Motion Primitives for Wind Energy-Harvesting Fixed-Wing Aircraft

arXiv.org Artificial Intelligence

In this work, a set of motion primitives is defined for use in an energy-aware motion planning problem. The motion primitives are defined as sequences of control inputs to a simplified four-DOF dynamics model and are used to replace the traditional continuous control space used in many sampling-based motion planners. The primitives are implemented in a Stable Sparse Rapidly Exploring Random Tree (SST) motion planner and compared to an identical planner using a continuous control space. The planner using primitives was found to run 11.0\% faster but yielded solution paths that were on average worse with higher variance. Also, the solution path travel time is improved by about 50\%. Using motion primitives for sampling spaces in SST can effectively reduce the run time of the algorithm, although at the cost of solution quality.


There's a Wave of Violence in the West Bank. New York Charities Are Helping Fund It.

Slate

This story originally appeared in New York Focus, a nonprofit news publication investigating power in New York. Vigilante violence is at an all-time high in the occupied West Bank. Emboldened by the war in the Gaza Strip and backed by the military, Israeli settlers aiming to annex more and more of the Palestinian territory have launched hundreds of attacks, displacing people from at least 17 communities over the past month while soldiers and settlers have killed nearly 200. And at least three New York nonprofit organizations are calling on donors to help outfit those settlers with combat gear, in a fundraising blitz funneling millions of tax-deductible dollars to the West Bank aggression. By chipping into a "thermal drone matching campaign," donors can help the Long Island–based One Israel Fund buy remote-controlled aerial vehicles for settler militias.


Visual Environment Assessment for Safe Autonomous Quadrotor Landing

arXiv.org Artificial Intelligence

Autonomous identification and evaluation of safe landing zones are of paramount importance for ensuring the safety and effectiveness of aerial robots in the event of system failures, low battery, or the successful completion of specific tasks. In this paper, we present a novel approach for detection and assessment of potential landing sites for safe quadrotor landing. Our solution efficiently integrates 2D and 3D environmental information, eliminating the need for external aids such as GPS and computationally intensive elevation maps. The proposed pipeline combines semantic data derived from a Neural Network (NN), to extract environmental features, with geometric data obtained from a disparity map, to extract critical geometric attributes such as slope, flatness, and roughness. We define several cost metrics based on these attributes to evaluate safety, stability, and suitability of regions in the environments and identify the most suitable landing area. Our approach runs in real-time on quadrotors equipped with limited computational capabilities. Experimental results conducted in diverse environments demonstrate that the proposed method can effectively assess and identify suitable landing areas, enabling the safe and autonomous landing of a quadrotor.


US Navy destroyer shoots down drone from Yemen in the Red Sea

FOX News

The U.S. Department of Defense released video footage of a U.S. air strike on a training and weapons facility in Abul Kamal, Syria. The USS Thomas Hudner, an Arleigh Burke-class destroyer, shot down a drone from Yemen in the Red Sea on Wednesday, two U.S. defense officials confirmed to Fox News. A defense official said the drone was shot down in self-defense. "The drone was heading towards the Hudner," the official said. The drone attack is the latest in a series of attacks on American troops stationed in the Middle East amid the ongoing Israel-Hamas war.


Safety, Trust, and Ethics Considerations for Human-AI Teaming in Aerospace Control

arXiv.org Artificial Intelligence

Designing a safe, trusted, and ethical AI may be practically impossible; however, designing AI with safe, trusted, and ethical use in mind is possible and necessary in safety and mission-critical domains like aerospace. Safe, trusted, and ethical use of AI are often used interchangeably; however, a system can be safely used but not trusted or ethical, have a trusted use that is not safe or ethical, and have an ethical use that is not safe or trusted. This manuscript serves as a primer to illuminate the nuanced differences between these concepts, with a specific focus on applications of Human-AI teaming in aerospace system control, where humans may be in, on, or out-of-the-loop of decision-making.


MITFAS: Mutual Information based Temporal Feature Alignment and Sampling for Aerial Video Action Recognition

arXiv.org Artificial Intelligence

We present a novel approach for action recognition in UAV videos. Our formulation is designed to handle occlusion and viewpoint changes caused by the movement of a UAV. We use the concept of mutual information to compute and align the regions corresponding to human action or motion in the temporal domain. This enables our recognition model to learn from the key features associated with the motion. We also propose a novel frame sampling method that uses joint mutual information to acquire the most informative frame sequence in UAV videos. We have integrated our approach with X3D and evaluated the performance on multiple datasets. In practice, we achieve 18.9% improvement in Top-1 accuracy over current state-of-the-art methods on UAV-Human(Li et al., 2021), 7.3% improvement on Drone-Action(Perera et al., 2019), and 7.16% improvement on NEC Drones(Choi et al., 2020).


URANUS: Radio Frequency Tracking, Classification and Identification of Unmanned Aircraft Vehicles

arXiv.org Artificial Intelligence

Safety and security issues for Critical Infrastructures are growing as attackers adopt drones as an attack vector flying in sensitive airspaces, such as airports, military bases, city centers, and crowded places. Despite the use of UAVs for logistics, shipping recreation activities, and commercial applications, their usage poses severe concerns to operators due to the violations and the invasions of the restricted airspaces. A cost-effective and real-time framework is needed to detect the presence of drones in such cases. In this contribution, we propose an efficient radio frequency-based detection framework called URANUS. We leverage real-time data provided by the Radio Frequency/Direction Finding system, and radars in order to detect, classify and identify drones (multi-copter and fixed-wings) invading no-drone zones. We adopt a Multilayer Perceptron neural network to identify and classify UAVs in real-time, with $90$% accuracy. For the tracking task, we use a Random Forest model to predict the position of a drone with an MSE $\approx0.29$, MAE $\approx0.04$, and $R^2\approx 0.93$. Furthermore, coordinate regression is performed using Universal Transverse Mercator coordinates to ensure high accuracy. Our analysis shows that URANUS is an ideal framework for identifying, classifying, and tracking UAVs that most Critical Infrastructure operators can adopt.