Goto

Collaborating Authors

 Volga Federal District


Russia-Ukraine war: List of key events, day 1,389

Al Jazeera

What is in the 28-point US plan for Ukraine? 'Ukraine is running out of men, money and time' Can the US get all sides to end the war? Why is Europe opposing Trump's peace plan? Two people were killed in a Ukrainian drone strike on the Russian city of Saratov, regional Governor Roman Busargin said in a statement on Telegram. An unspecified number of people were also injured in the attack.


Russian attacks cut power for thousands in Ukraine as peace talks press on

Al Jazeera

Russian attacks have left thousands without power in Ukraine, while a drone attack killed two people in Russia, as United States-led peace talks on ending the war, deep in its fourth year, press on. Ukrainian President Volodymyr Zelenskyy said Saturday that Russian night-time attacks damaged more than a dozen civilian facilities, disrupting power in seven regions. "They still aim to destroy our state and inflict maximum pain on our people." Kyiv and its Western allies have repeatedly said Russia is trying to cripple the Ukrainian power grid and deny civilians access to heat, light and running water for a fourth consecutive winter, in what Ukrainian officials call "weaponising" the cold. Russian attacks left parts of the Kherson region, including the regional capital, Kherson, without power, according to regional head Oleksandr Prokudin.


Russia-Ukraine war: List of key events, day 1,374

Al Jazeera

What is in the 28-point US plan for Ukraine? Why is Europe opposing Trump's peace plan? Is the fall of Pokrovsk inevitable? 'A corruption scandal may well end the Ukraine war' Here's where things stand on Saturday, November 29. Russian drones struck six locations in Kyiv's city centre and eastern suburbs early on Saturday, injuring four people, as apartment buildings and other dwellings were hit, said the head of Kyiv's military administration, Tymur Tkachenko.


Russia says talks to end Ukraine war 'serious' but rules out concessions

Al Jazeera

What is in the 28-point US plan for Ukraine? Why is Europe opposing Trump's peace plan? Is the fall of Pokrovsk inevitable? 'A corruption scandal may well end the Ukraine war' Russia says talks to end Ukraine war'serious' but rules out concessions Russia says the United States-brokered talks to end the war with Ukraine are "serious", but its officials caution that an agreement is a long way off and Moscow would offer no major concessions to Kyiv. Kremlin spokesman Dmitry Peskov said in televised comments on Wednesday that the negotiations were ongoing and "the process is serious."


StableTrack: Stabilizing Multi-Object Tracking on Low-Frequency Detections

Shelukhan, Matvei, Mamedov, Timur, Kvanchiani, Karina

arXiv.org Artificial Intelligence

Multi-object tracking (MOT) is one of the most challenging tasks in computer vision, where it is important to correctly detect objects and associate these detections across frames. Current approaches mainly focus on tracking objects in each frame of a video stream, making it almost impossible to run the model under conditions of limited computing resources. T o address this issue, we propose Stable-Track, a novel approach that stabilizes the quality of tracking on low-frequency detections. Our method introduces a new two-stage matching strategy to improve the cross-frame association between low-frequency detections. W e propose a novel Bbox-Based Distance instead of the conventional Mahalanobis distance, which allows us to effectively match objects using the Re-ID model. Furthermore, we integrate visual tracking into the Kalman Filter and the overall tracking pipeline. Our method outperforms current state-of-the-art trackers in the case of low-frequency detections, achieving 11.6% HOTA improvement at 1 Hz on MOT17-val, while keeping up with the best approaches on the standard MOT17, MOT20, and DanceTrack benchmarks with full-frequency detections.


MSA - Technique for Stiffness Modeling of Manipulators with Complex and Hybrid Structures

Klimchik, Alexandr, Pashkevich, Anatol, Chablat, Damien

arXiv.org Artificial Intelligence

The paper presents a systematic approach for stiffness modeling of manipulators with complex and hybrid structures using matrix structural analysis. In contrast to previous results, it is suitable for mixed architectures containing closed-loops, flexible links, rigid connections, passive and elastic joints with external loadings and preloadings. The proposed approach produces the Cartesian stiffness matrices in a semi-analytical manner. It presents the manipulator stiffness model as a set of conventional equations describing the link elasticities that are supplemented by a set of constraints describing connections between links. Its allows user straightforward aggregation of stiffness model equations avoiding traditional column/row merging procedures in the extended stiffness matrix. Advantages of this approach are illustrated by stiffness analysis of NaVaRo manipulator.

  Country:
  Genre: Research Report (0.40)

Airfoil optimization using Design-by-Morphing with minimized design-space dimensionality

Lee, Sangjoon, Sheikh, Haris Moazam

arXiv.org Artificial Intelligence

Effective airfoil geometry optimization requires exploring a diverse range of designs using as few design variables as possible. This study introduces AirDbM, a Design-by-Morphing (DbM) approach specialized for airfoil optimization that systematically reduces design-space dimensionality. AirDbM selects an optimal set of 12 baseline airfoils from the UIUC airfoil database, which contains over 1,600 shapes, by sequentially adding the baseline that most increases the design capacity. With these baselines, AirDbM reconstructs 99 % of the database with a mean absolute error below 0.005, which matches the performance of a previous DbM approach that used more baselines. In multi-objective aerodynamic optimization, AirDbM demonstrates rapid convergence and achieves a Pareto front with a greater hypervolume than that of the previous larger-baseline study, where new Pareto-optimal solutions are discovered with enhanced lift-to-drag ratios at moderate stall tolerances. Furthermore, AirDbM demonstrates outstanding adaptability for reinforcement learning (RL) agents in generating airfoil geometry when compared to conventional airfoil parameterization methods, implying the broader potential of DbM in machine learning-driven design.


Ukraine faces 'exhausting battles' against Russia in Zaporizhia, Donetsk

Al Jazeera

Is the fall of Pokrovsk inevitable? Is Trump losing patience with Putin? Will sanctions against Russian oil giants hurt Putin? Ukraine faces'exhausting battles' against Russia in Zaporizhia, Donetsk Russian forces pressed into Ukraine's eastern towns of Pokrovsk and Myrnohrad during the past week as Kyiv's military mounted a stout defence. On Tuesday, Ukraine's commander-in-chief Oleksandr Syrskii said almost half of the battles on a 1,200km (745-mile) front were happening in the two towns, claiming Russia has committed 150,000 troops - almost a quarter of its strength in Ukraine - to capturing them.


Russia-Ukraine war: List of key events, day 1,357

Al Jazeera

Is the fall of Pokrovsk inevitable? Is Trump losing patience with Putin? Will sanctions against Russian oil giants hurt Putin? Ukraine's top military commander, Oleksandr Syrskii, said the army's situation has "significantly worsened" in parts of the southeastern Zaporizhia region amid fierce fighting with Russian forces. Ukrainian President Volodymyr Zelenskyy said in a post on X that he had received an update from Syrskii, which conveyed that the situation" remains difficult" in the Zaporizhia region, as well as in the direction of the embattled city of Pokrovsk .


Russia infiltrates Pokrovsk with new tactics that test Ukraine's drones

Al Jazeera

Is Trump losing patience with Putin? Will sanctions against Russian oil giants hurt Putin? Russian forces have spread rapidly through Pokrovsk, the city in Ukraine's east where the warring sides have concentrated their manpower and tactical ingenuity during the past week, in what may be a final culmination of a 21-month battle. Geolocated footage placed Russian troops in central, northern and northeastern Pokrovsk, said the Institute for the Study of War (ISW), a Washington-based think tank. It set its sights on the city almost two years ago, after capturing Avdiivka, 39km (24 miles) to the east.