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Vlad Sobal

dblp:318/3136 · DBLP profile ↗
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2ranked-venue papers
1as first author
2since 2021 · last 2025
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 2 · 1 first-author · 2 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
2 papers
Reinforcement learning · 40% Motion planning and robot control · 20% Robot navigation and mapping · 20%

Topics — the 4 heaviest of 5, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Representation and self-supervised learning
contrastive learning
0.912025
X-Sample Contrastive Loss: Improving Contrastive Learning with Sample Similarity Graphs · ICLR 2025
Machine learning › Reinforcement learning
model-based reinforcement learning
0.912025
Hierarchical World Models as Visual Whole-Body Humanoid Controllers · ICLR 2025
Robotics › Motion planning and robot control › whole-body control
whole-body humanoid control
0.912025
Hierarchical World Models as Visual Whole-Body Humanoid Controllers · ICLR 2025
Machine learning › Reinforcement learning › model-based reinforcement learning
world model
0.912025
Hierarchical World Models as Visual Whole-Body Humanoid Controllers · ICLR 2025

Methods — techniques the papers use, named apart from their topics

sample similarity graphs · 0.9hierarchical reinforcement learning · 0.9contrastive loss · 0.9
YearPublicationVenuePosition
2025 Hierarchical World Models as Visual Whole-Body Humanoid Controllers
abstract
Whole-body control for humanoids is challenging due to the high-dimensional nature of the problem, coupled with the inherent instability of a bipedal morphology. Learning from visual observations further exacerbates this difficulty. In this work, we explore highly data-driven approaches to visual whole-body humanoid control based on reinforcement learning, without any simplifying assumptions, reward design, or skill primitives. Specifically, we propose a hierarchical world model in which a high-level agent generates commands based on visual observations for a low-level agent to execute, both of which are trained with rewards. Our approach produces highly performant control policies in 8 tasks with a simulated 56-DoF humanoid, while synthesizing motions that are broadly preferred by humans. Code and videos: https://www.nicklashansen.com/rlpuppeteer
Nicklas Hansen 0001, Jyothir S. V, Vlad Sobal, Yann LeCun, Xiaolong Wang 0004, Hao Su 0001
ICLR3
2025 X-Sample Contrastive Loss: Improving Contrastive Learning with Sample Similarity Graphs
Vlad Sobal, Mark Ibrahim, Randall Balestriero, Vivien Cabannes, Diane Bouchacourt, Pietro Astolfi, Kyunghyun Cho, Yann LeCun
ICLR1