Tootfinder

When you are asked to put a poster on, but the frame is the other way around.
#rail #train

It's frustrating to see such high turnover in the city planning office. I encourage the city to take the complaints of its exiting planners more seriously and put greater effort into their retention. It shouldn't be taking this long to get form-based zoning in place. We could have hundreds more units in place by now if our planners were allowed to simply do their jobs.
#NHPolitics #NHHousing

“Personality vs. Personalization” in AI Systems: Specific Uses and Concrete Risks (Part 2)
https://fpf.org/blog/personality-vs-personalization-in-ai-systems-specific-uses-and-concrete-risks-part-2/
@…

Failing at keeping apart Niklas Luhmann, Marshall McLuhan, and Baz Luhrmann.

A fire at South Korea's National Information Resources Service's data center shut down 647 government IT systems, disrupting services such as postal banking (Lee Jung-joo/The Korea Herald)
https://www.koreaherald.com/article/10584785

Fire at government data center halts 647 systems, disrupts services - The Korea Herald
A fire at the National Information Resources Service’s data center in Daejeon late Friday temporarily shut down 647 government IT systems, according to the Mini

1. Have a simple job to do. Figure out #Makefile will do the job.
2. Think a bit about portability. Makefile becomes slightly more complex.
3. You're finally done. It turns out that some stupid implicit rule in GNU Make fires and adds a `rm` at the end that removes part of the output.
4. Use #Meson.
Just an average #Gentoo day.
[UPDATE: Now I regret using Meson. If you do anything that's not 100% boilerplate, it just keeps throwing obstacles in your way.]

Model Context Protocols in Adaptive Transport Systems: A Survey
Gaurab Chhetri, Shriyank Somvanshi, Md Monzurul Islam, Shamyo Brotee, Mahmuda Sultana Mimi, Dipti Koirala, Biplov Pandey, Subasish Das
https://arxiv.org/abs/2508.19239

Model Context Protocols in Adaptive Transport Systems: A Survey
The rapid expansion of interconnected devices, autonomous systems, and AI applications has created severe fragmentation in adaptive transport systems, where diverse protocols and context sources remain isolated. This survey provides the first systematic investigation of the Model Context Protocol (MCP) as a unifying paradigm, highlighting its ability to bridge protocol-level adaptation with context-aware decision making. Analyzing established literature, we show that existing efforts have impli…

My latest for The Register, on the multi-decade challenge of improving security in the core of the Internet https://www.theregister.com/2025/08/27/systems_approach_securing_internet_infrastructure/?td=rt-3a

BGP’s security problems are notorious. Attempts to fix that are a work in progress
Systems Approach: Securing internet infrastructure remains a challenging endeavour

Characterization of Translation Bounded Measure Dynamical Systems and Positive Measure Dynamical Systems within the Spatial Processes
Franziska Sieron
https://arxiv.org/abs/2508.17425

Characterization of Translation Bounded Measure Dynamical Systems and Positive Measure Dynamical Systems within the Spatial Processes
In this paper we consider spatial processes and measure dynamical systems over locally compact Abelian groups. We characterize when a spatial processes is equivalent to a translation bounded measure dynamical systems and we characterize when a spatial processes is equivalent to a positive measure dynamical systems. The basic idea of our approach is the identification of the elements of a spatial process with translation bounded measures respectively positive measures by applying the Gelfand the…

Interfaces of discrete systems - spectral and index properties
Chris Bourne
https://arxiv.org/abs/2508.17813 https://arxiv.org/pdf/2508.17813

Interfaces of discrete systems - spectral and index properties
We develop a general mathematical framework to study mixtures of different physical systems brought together on a discrete interface. Adapting work by Măntoiu et al., we use an operator algebraic framework such that the bulk systems at infinity of the mixture are recovered via the spatial asymptotics of the operators on the interface. Fixing an asymptotics and interface algebra, we show how the essential spectrum and topological properties can be inferred from the bulk systems at infinity. By …

Quantum Mpemba effect in parity-time symmetric systems
Wanchen Ma, Junjie Liu
https://arxiv.org/abs/2508.17575 https://arxiv.org/pdf/2508.17575

Quantum Mpemba effect in parity-time symmetric systems
The quantum Mpemba effect (QMPE), an anomalous relaxation phenomenon, has been demonstrated in both closed and open Hermitian quantum systems. While prior studies have linked the QMPE to Liouvillian exceptional points--non-Hermitian features emerged at the Liouvillian level, it remains largely elusive whether the QMPE can occur in intrinsic non-Hermitian systems, where non-Hermiticity is inherent at the Hamiltonian level. Here, we unequivocally demonstrate the occurrence of QMPE in experimental…

AS2FM: Enabling Statistical Model Checking of ROS 2 Systems for Robust Autonomy
Christian Henkel, Marco Lampacrescia, Michaela Klauck, Matteo Morelli
https://arxiv.org/abs/2508.18820

AS2FM: Enabling Statistical Model Checking of ROS 2 Systems for Robust Autonomy
Designing robotic systems to act autonomously in unforeseen environments is a challenging task. This work presents a novel approach to use formal verification, specifically Statistical Model Checking (SMC), to verify system properties of autonomous robots at design-time. We introduce an extension of the SCXML format, designed to model system components including both Robot Operating System 2 (ROS 2) and Behavior Tree (BT) features. Further, we contribute Autonomous Systems to Formal Models (AS2…

Benchmarking the Robustness of Agentic Systems to Adversarially-Induced Harms
Jonathan N\"other, Adish Singla, Goran Radanovic
https://arxiv.org/abs/2508.16481 https://

Benchmarking the Robustness of Agentic Systems to Adversarially-Induced Harms
Ensuring the safe use of agentic systems requires a thorough understanding of the range of malicious behaviors these systems may exhibit when under attack. In this paper, we evaluate the robustness of LLM-based agentic systems against attacks that aim to elicit harmful actions from agents. To this end, we propose a novel taxonomy of harms for agentic systems and a novel benchmark, BAD-ACTS, for studying the security of agentic systems with respect to a wide range of harmful actions. BAD-ACTS co…

A Survey of Threats Against Voice Authentication and Anti-Spoofing Systems
Kamel Kamel, Keshav Sood, Hridoy Sankar Dutta, Sunil Aryal
https://arxiv.org/abs/2508.16843 https://…

A Survey of Threats Against Voice Authentication and Anti-Spoofing Systems
Voice authentication has undergone significant changes from traditional systems that relied on handcrafted acoustic features to deep learning models that can extract robust speaker embeddings. This advancement has expanded its applications across finance, smart devices, law enforcement, and beyond. However, as adoption has grown, so have the threats. This survey presents a comprehensive review of the modern threat landscape targeting Voice Authentication Systems (VAS) and Anti-Spoofing Counterm…

1. "It's just two pipelines with awk, and a comm, I'll write it in POSIX #shell."
2. "Hmm, need some error handling too."
3. "Oh wait, there is no PIPESTATUS in POSIX shell? How are you supposed to check the pipeline for errors?!"
4. "Eff it, I'll just use #Python."
Just a regular day in #Gentoo.

Metacurity is pleased to offer our free and premium subscribers a weekly digest of the best long-form (and longish) infosec-related pieces we couldn't properly fit into our daily news crush.
This week's selection covers
--How an NYT reporter almost fell for a scam,
--Hackers increasingly take aim at small-town water systems,
--Citizens must shift their threat models under Trump's regime,
--Even the most innocent AI model can spew out dark material,

Best infosec-related long reads for the week of 9/20/25
How an NYT reporter almost fell for a scam, Hackers increasingly take aim at small-town water systems, Citizens must shift their threat models under Trump's regime, Even the most innocent AI model can spew out dark material, Building a pipeline for scraping CTI content from Telegram

The role of synthetic data in Multilingual, Multi-cultural AI systems: Lessons from Indic Languages
Pranjal A. Chitale, Varun Gumma, Sanchit Ahuja, Prashant Kodali, Manan Uppadhyay, Deepthi Sudharsan, Sunayana Sitaram
https://arxiv.org/abs/2509.21294

The role of synthetic data in Multilingual, Multi-cultural AI systems: Lessons from Indic Languages
Developing AI systems that operate effectively across languages while remaining culturally grounded is a long-standing challenge, particularly in low-resource settings. Synthetic data provides a promising avenue, yet its effectiveness in multilingual and multicultural contexts remains underexplored. We investigate the creation and impact of synthetic, culturally contextualized datasets for Indian languages through a bottom-up generation strategy that prompts large open-source LLMs (>= 235B para…

Membership Inference Attacks on LLM-based Recommender Systems
Jiajie He, Yuechun Gu, Min-Chun Chen, Keke Chen
https://arxiv.org/abs/2508.18665 https://arxi…

Membership Inference Attacks on LLM-based Recommender Systems
Large language models (LLMs) based Recommender Systems (RecSys) can flexibly adapt recommendation systems to different domains. It utilizes in-context learning (ICL), i.e., the prompts, to customize the recommendation functions, which include sensitive historical user-specific item interactions, e.g., implicit feedback like clicked items or explicit product reviews. Such private information may be exposed to novel privacy attack. However, no study has been done on this important issue. We desig…

I've put preprints of our FUNARCH papers on my home page (“Six Years of FUNAR - Functional Training for Software Architects”, “Evolution of Functional UI Paradigms”).
https://www.deinprogramm.de/sperber/papers/

Generative Flow Networks for Personalized Multimedia Systems: A Case Study on Short Video Feeds
Yili Jin, Ling Pan, Rui-Xiao Zhang, Jiangchuan Liu, Xue Liu
https://arxiv.org/abs/2508.17166

Generative Flow Networks for Personalized Multimedia Systems: A Case Study on Short Video Feeds
Multimedia systems underpin modern digital interactions, facilitating seamless integration and optimization of resources across diverse multimedia applications. To meet growing personalization demands, multimedia systems must efficiently manage competing resource needs, adaptive content, and user-specific data handling. This paper introduces Generative Flow Networks (GFlowNets, GFNs) as a brave new framework for enabling personalized multimedia systems. By integrating multi-candidate generative…

Blind Channel Estimation for RIS-Assisted Millimeter Wave Communication Systems
Dianhao Jia, Wenqian Shen, Jianping An, Byonghyo Shim
https://arxiv.org/abs/2508.17710 https://…

Blind Channel Estimation for RIS-Assisted Millimeter Wave Communication Systems
In the research of RIS-assisted communication systems, channel estimation is a problem of vital importance for further performance optimization. In order to reduce the pilot overhead to the greatest extent, blind channel estimation methods are required, which can estimate the channel and the transmit signals at the same time without transmitting pilot sequence. Different from existing researches in traditional MIMO systems, the RIS-assisted two-hop channel brings new challenges to the blind cha…

New research has found that leading LLMs falter dramatically when exam questions are subtly reworded, raising doubts about whether these systems are truly capable of clinical reasoning.
https://www.computing.co.uk/news/2025/ai/t

Top AI models struggle with medical questions in real-world scenarios, study finds
AI systems that boast near-perfect scores on medical licensing exams may not be as clever as they seem.

Frequency Domain Stability Conditions for Hybrid AC/DC Systems
Dahlia Saba, Dominic Gro{\ss}
https://arxiv.org/abs/2509.20649 https://arxiv.org/pdf/2509.20…

Frequency Domain Stability Conditions for Hybrid AC/DC Systems
In this article, we investigate small-signal frequency and DC voltage stability of hybrid AC/DC power systems that combine AC and DC transmission, conventional machine- based generation, and converter-interfaced generation. The main contributions of this work are a compact frequency domain representation of hybrid AC/DC systems and associated stability conditions that can be divided into conditions on the individual bus dynamics and conditions on each DC network. The bus- level conditions apply…

A Defect Classification Framework for AI-Based Software Systems (AI-ODC)
Mohammed O. Alannsary
https://arxiv.org/abs/2508.17900 https://arxiv.org/pdf/2508.…

A Defect Classification Framework for AI-Based Software Systems (AI-ODC)
Artificial Intelligence has gained a lot of attention recently, it has been utilized in several fields ranging from daily life activities, such as responding to emails and scheduling appointments, to manufacturing and automating work activities. Artificial Intelligence systems are mainly implemented as software solutions, and it is essential to discover and remove software defects to assure its quality using defect analysis which is one of the major activities that contribute to software qualit…

Enabling Multi-Agent Systems as Learning Designers: Applying Learning Sciences to AI Instructional Design
Jiayi Wang, Ruiwei Xiao, Xinying Hou, John Stamper
https://arxiv.org/abs/2508.16659

Enabling Multi-Agent Systems as Learning Designers: Applying Learning Sciences to AI Instructional Design
K-12 educators are increasingly using Large Language Models (LLMs) to create instructional materials. These systems excel at producing fluent, coherent content, but often lack support for high-quality teaching. The reason is twofold: first, commercial LLMs, such as ChatGPT and Gemini which are among the most widely accessible to teachers, do not come preloaded with the depth of pedagogical theory needed to design truly effective activities; second, although sophisticated prompt engineering can …

A Variable-Separation-based Domain Decomposition Method for Parametric Dynamical Systems
Yuming Ba, Liang Chen, Yaru Chen, Qiuqi Li
https://arxiv.org/abs/2508.17276 https://

A Variable-Separation-based Domain Decomposition Method for Parametric Dynamical Systems
This paper proposes a model order reduction method for a class of parametric dynamical systems. Using a temporal Fourier integral transform, we reformulate these systems into complex-valued elliptic equations in the frequency domain, containing both the frequency variables and the parameters inherited from the original model. To reduce the computational cost of the frequency-variable elliptic equations, we extend the variable-separation-based domain decomposition method to the complex-valued co…

Additive systems for $\mathbb{Z}$ are undecidable
Andrei Zabolotskii
https://arxiv.org/abs/2508.17285 https://arxiv.org/pdf/2508.17285

Additive systems for $\mathbb{Z}$ are undecidable
What are the collections of sets ${A}_i\subset\mathbb{Z}$ such that any $n\in\mathbb{Z}$ has exactly one representation as $n=a_0+a_1+\dotsb$ with $a_i\in{A}_i$? The answer for $\mathbb{N}_0$ instead of $\mathbb{Z}$ is given by a theorem of de Bruijn. We describe a family of natural candidate collections for $\mathbb{Z}$, which we call canonical collections. Translating the problem into the language of dynamical systems, we show that the question of whether the sumset of a canonical collection …

I've finally organized all my photos in per-date location directories on my PC. However, now I needed to sync the changes back to the phone.
#SyncThing doesn't work so well with such huge changes. So I've figured out I'll just delete it from ST for now, connect via MTP-over-USB, and use rsync on top of gvfs mount. However, rsync started throwing I/O errors.
Okay, nuclear option then. I'll remove all the old files (most of them were moved anyway), and then copy everything over via Thunar. So I've started deleting files via MTP, and it's progressing so slow. Okay, so I stopped that and instead use the file manager on the phone to delete them… but it's also slow. Finally, I've figured out to use #ADB and just do 'rm' from a shell — and that was finally fast.
Now to copy the 25 GiB back… Yeah, I keep all old photos on the phone as a backup.
#Android

SIREN: Software Identification and Recognition in HPC Systems
Thomas Jakobsche, Fredrik Roberts\'en, Jessica R. Jones, Utz-Uwe Haus, Florina M. Ciorba
https://arxiv.org/abs/2508.18950

SIREN: Software Identification and Recognition in HPC Systems
HPC systems use monitoring and operational data analytics to ensure efficiency, performance, and orderly operations. Application-specific insights are crucial for analyzing the increasing complexity and diversity of HPC workloads, particularly through the identification of unknown software and recognition of repeated executions, which facilitate system optimization and security improvements. However, traditional identification methods using job or file names are unreliable for arbitrary user-pr…

On the symmetry group for systems of conservation laws
Michael Sever
https://arxiv.org/abs/2509.21283 https://arxiv.org/pdf/2509.21283

On the symmetry group for systems of conservation laws
A case can be made that the utility of quasi-linear systems of conservation laws as physical models is largely limited to Euler system models of fluid flow, at least in higher dimensions. Qualified corroboration of this conjecture is obtained here, by attempt to extend the class of systems attractive as physical models via the associated symmetry group.

Mind the crosscap: $\tau$-scaling in non-orientable gravity and time-reversal-invariant systems
Gabriele Di Ubaldo, Altay Etkin, Felix M. Haehl, Moshe Rozali
https://arxiv.org/abs/2509.20448

Mind the crosscap: $τ$-scaling in non-orientable gravity and time-reversal-invariant systems
Spectral statistics of quantum chaotic systems are governed by random matrix universality. In many cases of interest, time-reversal symmetry selects the Gaussian Orthogonal Ensemble (GOE) as the relevant universality class. In holographic CFTs, this is mirrored by the presence of non-orientable geometries in the dual gravitational path integral. In this work, we analyze general properties of these matrix models and their gravitational counterparts. First, we develop a formalism to express the u…

UAV-Enabled ISAC Systems with Fluid Antennas
Wenchao Liu, Xuhui Zhang, Jinke Ren, Weijie Yuan, Changsheng You, Shuangyang Li
https://arxiv.org/abs/2509.21105 https://

UAV-Enabled ISAC Systems with Fluid Antennas
Unmanned aerial vehicle (UAV)-enabled integrated sensing and communication (ISAC) is regarded as a key enabler for next-generation wireless systems. However, conventional fixed antenna arrays limit the ability of UAVs to fully exploit their inherent potential. To overcome this limitation, we propose a UAV-enabled ISAC framework equipped with fluid antenna (FA) arrays, where the mobility of antenna elements introduces additional spatial degrees of freedom to simultaneously enhance communication …

Rebalancing Modular Transit Systems: A Hierarchical Graph-Based Optimization Framework for Fleet Sizing and Routing
Tina Radvand, Alireza Talebpour, Yanfeng Ouyang
https://arxiv.org/abs/2508.18643

Rebalancing Modular Transit Systems: A Hierarchical Graph-Based Optimization Framework for Fleet Sizing and Routing
This study addresses the rebalancing of empty modular transit pods between scheduled service trips in fixed-route bus systems. A two-stage hierarchical optimization framework is proposed. The first stage determines the minimum fleet size and initial vehicle assignments by solving a maximum matching problem on a bipartite graph, using a GPU-accelerated push-relabel algorithm. The second stage formulates detailed routing as a series of minimum-cost flow problems on time-space networks. To manage …

HWO Target Stars and Systems: A Prioritized Community List of Potential Stellar Targets for the Habitable Worlds Observatory's ExoEarth Survey
Noah W. Tuchow, Caleb K. Harada, Eric E. Mamajek, Angelle Tanner, Natalie R. Hinkel, Ruslan Belikov, Dan Sirbu, David R. Ciardi, Christopher C. Stark, Rhonda M. Morgan, Dmitri Savransky, Michael Turmon
https://

HWO Target Stars and Systems: A Prioritized Community List of Potential Stellar Targets for the Habitable Worlds Observatory's ExoEarth Survey
The HWO Target Stars and Systems 2025 (TSS25) list is a community-developed catalog of potential stellar targets for the Habitable Worlds Observatory (HWO) in its survey to directly image Earth-sized planets in the habitable zone. The TSS25 list categorizes potential HWO targets into priority tiers based on their likelihood to be surveyed and the necessity of obtaining observations of their stellar properties prior to the launch of the mission. This target list builds upon previous efforts to i…

Follow-up: looks like the possibility mentioned previously will become a reality:

South Korea confirms that a fire at National Information Resources Service's data center, housing 647 government IT systems, directly damaged 96 of them (Lee Jung-joo/The Korea Herald)
https://www.koreaherald.com/article/10585032

Govt. races to restore services after data center blaze; 96 systems confirmed damaged - The Korea Herald
The Ministry of Interior and Safety said Sunday that recovery work is currently in progress at the government-run National Information Resources Service in Daej

Numerical implementation of the partial secular approximation and unified master equation in structured open quantum systems
Antti Vaaranta, Marco Cattaneo
https://arxiv.org/abs/2508.17970

Numerical implementation of the partial secular approximation and unified master equation in structured open quantum systems
The Markovian dynamics of open quantum systems is typically described through Lindblad equations, which are derived from the Redfield equation via the full secular approximation. The latter neglects the rotating terms in the master equation corresponding to pairs of jump operators with different Bohr frequencies. However, for many physical systems this approximation breaks down, and thus a more accurate treatment of the slowly rotating terms is required. Indeed, more precise physical results ca…

STARec: An Efficient Agent Framework for Recommender Systems via Autonomous Deliberate Reasoning
Chenghao Wu, Ruiyang Ren, Junjie Zhang, Ruirui Wang, Zhongrui Ma, Qi Ye, Wayne Xin Zhao
https://arxiv.org/abs/2508.18812

STARec: An Efficient Agent Framework for Recommender Systems via Autonomous Deliberate Reasoning
While modern recommender systems are instrumental in navigating information abundance, they remain fundamentally limited by static user modeling and reactive decision-making paradigms. Current large language model (LLM)-based agents inherit these shortcomings through their overreliance on heuristic pattern matching, yielding recommendations prone to shallow correlation bias, limited causal inference, and brittleness in sparse-data scenarios. We introduce STARec, a slow-thinking augmented agent …

#TIL that the gyroscope is not very helpful for leveling photos when the train is accelerating or breaking.

STDiff: A State Transition Diffusion Framework for Time Series Imputation in Industrial Systems
Gary Simethy, Daniel Ortiz-Arroyo, Petar Durdevic
https://arxiv.org/abs/2508.19011

STDiff: A State Transition Diffusion Framework for Time Series Imputation in Industrial Systems
Most deep learning methods for imputing missing values treat the task as completing patterns within a fixed time window. This assumption often fails in industrial systems, where dynamics are driven by control actions, are highly non-stationary, and can experience long, uninterrupted gaps. We propose STDiff, which reframes imputation as learning how the system evolves from one state to the next. STDiff uses a conditional denoising diffusion model with a causal bias aligned to control theory, gen…

Research on Evaluation Methods for Patent Novelty Search Systems and Empirical Analysis
Shu Zhang, LiSha Zhang, Kai Duan, XinKai Sun
https://arxiv.org/abs/2508.17782 https://

Research on Evaluation Methods for Patent Novelty Search Systems and Empirical Analysis
Patent novelty search systems are critical to IP protection and innovation assessment; their retrieval accuracy directly impacts patent quality. We propose a comprehensive evaluation methodology that builds high-quality, reproducible datasets from examiner citations and X-type citations extracted from technically consistent family patents, and evaluates systems using invention descriptions as inputs. Using Top-k Detection Rate and Recall as core metrics, we further conduct multi-dimensional ana…

Diverse And Private Synthetic Datasets Generation for RAG evaluation: A multi-agent framework
Ilias Driouich, Hongliu Cao, Eoin Thomas
https://arxiv.org/abs/2508.18929 https://

Diverse And Private Synthetic Datasets Generation for RAG evaluation: A multi-agent framework
Retrieval-augmented generation (RAG) systems improve large language model outputs by incorporating external knowledge, enabling more informed and context-aware responses. However, the effectiveness and trustworthiness of these systems critically depends on how they are evaluated, particularly on whether the evaluation process captures real-world constraints like protecting sensitive information. While current evaluation efforts for RAG systems have primarily focused on the development of perfor…

Reliability Analysis of Fully Homomorphic Encryption Systems Under Memory Faults
Rian Adam Rajagede, Yan Solihin
https://arxiv.org/abs/2509.20686 https://a…

Reliability Analysis of Fully Homomorphic Encryption Systems Under Memory Faults
Fully Homomorphic Encryption (FHE) represents a paradigm shift in cryptography, enabling computation directly on encrypted data and unlocking privacy-critical computation. Despite being increasingly deployed in real platforms, the reliability aspects of FHE systems, especially how they respond to faults, have been mostly neglected. This paper aims to better understand of how FHE computation behaves in the presence of memory faults, both in terms of individual operations as well as at the level …

Automotive-ENV: Benchmarking Multimodal Agents in Vehicle Interface Systems
Junfeng Yan, Biao Wu, Meng Fang, Ling Chen
https://arxiv.org/abs/2509.21143 https://

Automotive-ENV: Benchmarking Multimodal Agents in Vehicle Interface Systems
Multimodal agents have demonstrated strong performance in general GUI interactions, but their application in automotive systems has been largely unexplored. In-vehicle GUIs present distinct challenges: drivers' limited attention, strict safety requirements, and complex location-based interaction patterns. To address these challenges, we introduce Automotive-ENV, the first high-fidelity benchmark and interaction environment tailored for vehicle GUIs. This platform defines 185 parameterized tasks…

Space-Time Coded RIS-Assisted Wireless Systems with Practical Reflection Models: Error Rate Analysis and Negative Moment-Based Optimization with Saddle Point Approximation
Tayfun Yilmaz, Haci Ilhan, Ibrahim Hokelek
https://arxiv.org/abs/2508.19129

Space-Time Coded RIS-Assisted Wireless Systems with Practical Reflection Models: Error Rate Analysis and Negative Moment-Based Optimization with Saddle Point Approximation
RIS-assisted communication has recently attracted significant attention for enhancing wireless performance in challenging environments, making accurate error analysis under practical hardware constraints crucial for future multi-antenna systems. This paper presents a theoretical framework for SER analysis of RIS-assisted multiple antenna systems employing OSTBC under practical reflection models with amplitude-dependent and quantized phase responses. By exploiting the Gramian structure of the ca…

A Consensus Algorithm for Second-Order Systems Evolving on Lie Groups
Akhil B Krishna, Farshad Khorrami, Anthony Tzes
https://arxiv.org/abs/2508.17473 https://

A Consensus Algorithm for Second-Order Systems Evolving on Lie Groups
In this paper, a consensus algorithm is proposed for interacting multi-agents, which can be modeled as simple Mechanical Control Systems (MCS) evolving on a general Lie group. The standard Laplacian flow consensus algorithm for double integrator systems evolving on Euclidean spaces is extended to a general Lie group. A tracking error function is defined on a general smooth manifold for measuring the error between the configurations of two interacting agents. The stability of the desired consens…

Tell me, how much of a #CarBrain you have to consider it a great idea to honk at passing pedestrians, whom you know, to say "hi"?

Integrating and Characterizing HPC Task Runtime Systems for hybrid AI-HPC workloads
Andre Merzky, Mikhail Titov, Matteo Turilli, Shantenu Jha
https://arxiv.org/abs/2509.20819 ht…

Integrating and Characterizing HPC Task Runtime Systems for hybrid AI-HPC workloads
Scientific workflows increasingly involve both HPC and machine-learning tasks, combining MPI-based simulations, training, and inference in a single execution. Launchers such as Slurm's srun constrain concurrency and throughput, making them unsuitable for dynamic and heterogeneous workloads. We present a performance study of RADICAL-Pilot (RP) integrated with Flux and Dragon, two complementary runtime systems that enable hierarchical resource management and high-throughput function execution. Us…

On the radius of spatial analyticity for the Majda-Biello and Hirota-Satsuma systems
Seongyeon Kim, Ihyeok Seo
https://arxiv.org/abs/2509.21095 https://arx…

On the radius of spatial analyticity for the Majda-Biello and Hirota-Satsuma systems
We investigate the persistence of spatial analyticity for solutions to the Majda-Biello and Hirota-Satsuma systems with analytic initial data. This result is the first to establish analyticity persistence in such coupled KdV systems.

Observability and State Estimation for Smooth and Nonsmooth Differential Algebraic Equation Systems
Hesham Abdelfattah, Sameh A. Eisa, Peter Stechlinski
https://arxiv.org/abs/2508.18476

Observability and State Estimation for Smooth and Nonsmooth Differential Algebraic Equation Systems
In this work, we extend the sensitivity-based rank condition (SERC) test for local observability to another class of systems, namely smooth and nonsmooth differential-algebraic equation (DAE) systems of index-1. The newly introduced test for DAEs, which we call the lexicographic SERC (L-SERC) observability test, utilizes the theory of lexicographic differentiation to compute sensitivity information. Moreover, the newly introduced L-SERC observability test is useful in the context of partial obs…

Complexity of Error Bounds for Systems of Linear Inequalities
Zhou Wei, Michel Thera, Jen-Chih Yao
https://arxiv.org/abs/2509.20814 https://arxiv.org/pdf/2…

Complexity of Error Bounds for Systems of Linear Inequalities
Error bounds have been studied for over seventy years, beginning with Hoffman's 1952 result [ J. Res. Natl. Bur. Standards, 49(1952), 263-65], which provided a bound on the distance from any point to the solution set of a linear system. However, little is known about the inherent intractability of error bounds. This paper focuses on the complexity of error bounds and stbaility of error bounds for systems of linear inequalities. For the complexity of error bounds for linear inequalities, we refo…

Special curves and Hamiltonian systems from polynomial eigenfunctions of an elliptic operator
Juan Garc\'ia Escudero
https://arxiv.org/abs/2508.17065 https://

Special curves and Hamiltonian systems from polynomial eigenfunctions of an elliptic operator
A family of polynomials linked to the set of the deltoid tangents and its associated algebraic hypersurfaces has been presented in recent years. In this paper we study some related maximising and free plane curves. We also analyse the bifurcations on polynomial Hamiltonian dynamical systems defined from such a family.

Two-Timescale Learning for Pilot-Free ISAC Systems
Jian Xiao, Ji Wang, Qimei Cui, Lihua Li, Xingwang Li, Yingzhuang Liu, Tony Q. S. Quek
https://arxiv.org/abs/2508.17749 https:/…

Two-Timescale Learning for Pilot-Free ISAC Systems
A pilot-free integrated sensing and communication (ISAC) system is investigated, in which phase-modulated continuous wave (PMCW) and non-orthogonal multiple access (NOMA) waveforms are co-designed to achieve simultaneous target sensing and data transmission. To enhance effective data throughput (i.e., Goodput) in PMCW-NOMA ISAC systems, we propose a deep learning-based receiver architecture, termed two-timescale Transformer (T3former), which leverages a Transformer architecture to perform joint…

Ethics of Artificial Intelligence
Vincent C. M\"uller
https://arxiv.org/abs/2508.16658 https://arxiv.org/pdf/2508.16658…

Ethics of Artificial Intelligence
Artificial intelligence (AI) is a digital technology that will be of major importance for the development of humanity in the near future. AI has raised fundamental questions about what we should do with such systems, what the systems themselves should do, what risks they involve and how we can control these. - After the background to the field (1), this article introduces the main debates (2), first on ethical issues that arise with AI systems as objects, i.e. tools made and used by humans; her…

Really silly dream
I had a really silly #dream recently. I dreamt that my CFL broke. Or more specifically, it kept trying to turn out, successive parts of it were lighting up, then it all went off and tried again. And it looked like it had a bunch of cuts across it, and around these cuts little thunder sparks started appearing, like some kind of STALKER-like anomaly.
I finally flipped the switch, but the anomaly remained, and I wanted to get rid of it in case the sparks could jump onto my hardware and damage something. So I threw a metal bowl towards it, supposing the thunder would jump onto it. While it was flying near the anomaly, it slowed down and started turning back like a boomerang. On top of that, pieces of cat food (don't ask me why I threw a full bowl) were getting out of it and staying in the air levitating. When the bowl reached the floor and started turning again, Mr Ek came close to it and started levitating himself; he was sitting a few centimeters above the floor.
In the middle of all this, I've figured out I should record it. I took a bunch of photos with my phone, before I managed to switch to recording video.
Once I've recorded the fascinating flying bowls and levitating cat food, I needed to go back to discharging the thing. I threw a second metal bowl, and that one started levitating as well. I've figured out that's stupid, and I've found some big ass hammer with a metal end and a wooden handle. I held the end near the lamp to charge it, then tried to find something to discharge it to. I've tried some small stuff like the door handle, but obviously that wasn't sufficient. Finally, I've figured out to use the electricity box, since it is grounded. I held the hammer to it, watching sparks light the semi-darkness; I've recorded that as well.
And that's how much of it I remember.

Who Is Lagging Behind: Profiling Student Behaviors with Graph-Level Encoding in Curriculum-Based Online Learning Systems
Qian Xiao, Conn Breathnach, Ioana Ghergulescu, Conor O'Sullivan, Keith Johnston, Vincent Wade
https://arxiv.org/abs/2508.18925

Who Is Lagging Behind: Profiling Student Behaviors with Graph-Level Encoding in Curriculum-Based Online Learning Systems
The surge in the adoption of Intelligent Tutoring Systems (ITSs) in education, while being integral to curriculum- based learning, can inadvertently exacerbate performance gaps. To address this problem, student profiling becomes crucial for tracking progress, identifying struggling students, and alleviating disparities among students. Such profiling requires measuring student behaviors and performance across different aspects, such as content coverage, learning intensity, and proficiency in dif…

"Polish eggs"? What do you mean they're "Polish"? And do I really want to know? 🤔
#StupidQuestions

The Call for the 2026 International Symposium on Functional and Logic Programming (FLOPS) is open - the symposium itself will be May 26-28 in Akita, Japan. Deadline for the CfP is Dec 8 (abstracts) / Dec 16 (submissions).
Send us your best on the best of both worlds! (Also check out the new logo.)
https://function…

Quantum Algorithm for Subcellular Multiscale Reaction-Diffusion Systems
Margot Lockwood, Nathan Wiebe, Connah Johnson, Johannes M\"ulmenst\"adt, Jaehun Chun, Gregory Schenter, Margaret S. Cheung, Xiangyu Li
https://arxiv.org/abs/2509.20668

Quantum Algorithm for Subcellular Multiscale Reaction-Diffusion Systems
Computational modeling of cellular systems, where reactants are governed by biochemical equations and physical representations, requires extensive classical computing resources. These limitations significantly constrain the system size and spatiotemporal scales of simulations. A key challenge lies in the "curse of dimensionality", where the number of possible reaction terms grows exponentially with the number of species, and the computation of reaction rates involving many-body interactions bec…

Follow-up: they rejected my attempt to reclassify my internet bill as a phone bill:

The Use of the Simplex Architecture to Enhance Safety in Deep-Learning-Powered Autonomous Systems
Federico Nesti, Niko Salamini, Mauro Marinoni, Giorgio Maria Cicero, Gabriele Serra, Alessandro Biondi, Giorgio Buttazzo
https://arxiv.org/abs/2509.21014

The Use of the Simplex Architecture to Enhance Safety in Deep-Learning-Powered Autonomous Systems
Recently, the outstanding performance reached by neural networks in many tasks has led to their deployment in autonomous systems, such as robots and vehicles. However, neural networks are not yet trustworthy, being prone to different types of misbehavior, such as anomalous samples, distribution shifts, adversarial attacks, and other threats. Furthermore, frameworks for accelerating the inference of neural networks typically run on rich operating systems that are less predictable in terms of tim…

Sunken thicket fallacy: when the shortcut turns out quite overgrown, and the further you go, the denser it gets, but there is no point in turning back now and walking through all the thickets again.
#forest

Towards a Real-World Aligned Benchmark for Unlearning in Recommender Systems
Pierre Lubitzsch, Olga Ovcharenko, Hao Chen, Maarten de Rijke, Sebastian Schelter
https://arxiv.org/abs/2508.17076

Towards a Real-World Aligned Benchmark for Unlearning in Recommender Systems
Modern recommender systems heavily leverage user interaction data to deliver personalized experiences. However, relying on personal data presents challenges in adhering to privacy regulations, such as the GDPR's "right to be forgotten". Machine unlearning (MU) aims to address these challenges by enabling the efficient removal of specific training data from models post-training, without compromising model utility or leaving residual information. However, current benchmarks for unlearning in reco…

Tell me, when you need a photo for a document, aren't you worried that the photographer is using commercial software that will upload it somewhere, and that it will be used to train models?
I suspect the office issuing the documents isn't any better.
#privacy

Collaborative-Online-Learning-Enabled Distributionally Robust Motion Control for Multi-Robot Systems
Chao Ning, Han Wang, Longyan Li, Yang Shi
https://arxiv.org/abs/2508.17173 h…

Collaborative-Online-Learning-Enabled Distributionally Robust Motion Control for Multi-Robot Systems
This paper develops a novel COllaborative-Online-Learning (COOL)-enabled motion control framework for multi-robot systems to avoid collision amid randomly moving obstacles whose motion distributions are partially observable through decentralized data streams. To address the notable challenge of data acquisition due to occlusion, a COOL approach based on the Dirichlet process mixture model is proposed to efficiently extract motion distribution information by exchanging among robots selected lear…

So far, the fix for every musculoskeletal problem I've had seems to basically be "get better at ballet”.

Simulating monitoring-induced topological phase transitions with small systems
Rui Xie, Clemens Gneiting, Zheng-Yang Zhou, Ai-Xi Chen
https://arxiv.org/abs/2508.17632 https://…

Simulating monitoring-induced topological phase transitions with small systems
The topological properties of open quantum lattice systems have attracted much attention, due to their fundamental significance and potential applications. However, experimental demonstrations with large-scale lattice models remain challenging. On top of that, formulations of topology in terms of quantum trajectories require monitoring along with the detection of quantum jumps. This is particularly the case for the dark state-induced topology that relies on averaging quantum trajectories at the…

A morning thought: claiming that someone is "bothered" by the intensive smell of perfume is an unfair simplification.
It's not that I "don't like" intensive smells. It's an actual physiological reaction. I recall that a long time ago, I accidentally sat behind a classmate who used a lot of perfume. Took me a while to realize why I was getting dizzy wherever I leaned down to note something (at first I thought that leaning was the problem, not entering the cloud of perfume). Using perfumes is a choice, not getting dizzy over smells.
Same goes for noise. It's not that I "don't like" noise. It's that noise kills my nervous system. It's not that I have a choice.
#ActuallyAutistic

A Data-Driven Forced Oscillation Locating Method for Power Systems with Inverter-Based Resources
Yaojie Cai, Georgia Pierrou, Xiaozhe Wang, Geza Joos
https://arxiv.org/abs/2508.17505

A Data-Driven Forced Oscillation Locating Method for Power Systems with Inverter-Based Resources
Forced Oscillations (FO) stemming from external periodic disturbances threaten power system security and stability. The increasing penetration of Inverter-Based Resources(IBRs) further introduces FO, leading to new challenges in identifying and locating FO sources in modern power systems. In this paper, a novel data-driven method for locating FO in power systems with IBRs is proposed. Unlike previous works, a unified representation of FO originating from IBRs is considered, which further facili…

Shared ActBlue fundraising form update: Now up to 64 recipients again, including a city council race in Concord's municipal elections this November: #NHPolitics

A Universal Framework for Offline Serendipity Evaluation in Recommender Systems via Large Language Models
Yu Tokutake, Kazushi Okamoto, Kei Harada, Atsushi Shibata, Koki Karube
https://arxiv.org/abs/2508.17571

A Universal Framework for Offline Serendipity Evaluation in Recommender Systems via Large Language Models
Serendipity in recommender systems (RSs) has attracted increasing attention as a concept that enhances user satisfaction by presenting unexpected and useful items. However, evaluating serendipitous performance remains challenging because its ground truth is generally unobservable. The existing offline metrics often depend on ambiguous definitions or are tailored to specific datasets and RSs, thereby limiting their generalizability. To address this issue, we propose a universally applicable eval…

First and Second Order Optimal $\mathcal{H}_2$ Model Reduction for Linear Continuous-Time Systems
Wenshan Zhu, Imad Jaimoukha
https://arxiv.org/abs/2508.17503 https://

First and Second Order Optimal $\mathcal{H}_2$ Model Reduction for Linear Continuous-Time Systems
In this paper, we investigate the optimal $\mathcal{H}_2$ model reduction problem for single-input single-output (SISO) continuous-time linear time-invariant (LTI) systems. A semi-definite relaxation (SDR) approach is proposed to determine globally optimal interpolation points, providing an effective way to compute the reduced-order models via Krylov projection-based methods. In contrast to iterative approaches, we use the controllability Gramian and the moment-matching conditions to recast the…

0 days since I released with leftover debug print() in CLI.

Simulating Electron Transfer on Noisy Quantum Computers: A Scalable Approach to Open Quantum Systems
Marvin Gajewski, Alejandro D. Somoza, Gary Schmiedinghoff, Pascal Stadler, Michael Marthaler, Birger Horstmann
https://arxiv.org/abs/2508.18141

Simulating Electron Transfer on Noisy Quantum Computers: A Scalable Approach to Open Quantum Systems
Simulating large electronic networks with vibrational environments remains a fundamental challenge due to the long lifetimes of electronic-vibrational (vibronic) excitations on the picosecond scale. Quantum computers are a promising platform to simulate the dynamics of open quantum systems aided by intrinsic hardware-noise, with successful demonstrations of models with two electronic sites. We simulated a microscopic model of electron-transfer (ET) with a single donor and up to nine acceptor si…

Weather forecast yesterday: it's going to be raining all over the south of Poland.
Me: okay, I'm going to Zgorzelec, rain won't be a big hurdle there.
Forecast in the morning: heavy rain in Zgorzelec, little rain in Międzylesie.
Me: I'll go there then.
Reality: no rain for a long while, even a bit of sunshine. When I'm a kilometer distant from the train station, wind starts blowing hard. Leaves start hitting me, surprisingly hard. A few seconds later I realize it's hail. The streets run with water. And half an hour later, it becomes sunny.

When I was going to Nowogard, it was supposed to be a cold day, so I didn't take sandals to change into. I regretted that bitterly, as my feet melted.
When I was going to Bojanowo, the day was supposed to be even colder, but I took sandals and they were helpful when it got sunny. Yet I regretted not having a scarf on me, as the light jacket wasn't the best fit, between hot sun and strong, cold wind.
Today I'm truly prepared. I have sports shoes and sandals, long trousers and shorts, jacket and a scarf, just in case. I can still regret not having a winter cap and gloves.

Opening the Black Box: Interpretable Remedies for Popularity Bias in Recommender Systems
Parviz Ahmadov, Masoud Mansoury
https://arxiv.org/abs/2508.17297 https://

Opening the Black Box: Interpretable Remedies for Popularity Bias in Recommender Systems
Popularity bias is a well-known challenge in recommender systems, where a small number of popular items receive disproportionate attention, while the majority of less popular items are largely overlooked. This imbalance often results in reduced recommendation quality and unfair exposure of items. Although existing mitigation techniques address this bias to some extent, they typically lack transparency in how they operate. In this paper, we propose a post-hoc method using a Sparse Autoencoder (S…

Update: the only thing I didn't use yet is the scarf. Though technically I had the opportunity in Głogów, as it was quite windy.

Keep your cats in cardboard boxes, so you could easily move them around when you need to wipe the floor.
#cat #caturday #CatsOfMastodon

Cascade! Human in the loop shortcomings can increase the risk of failures in recommender systems
Wm. Matthew Kennedy, Nishanshi Shukla, Cigdem Patlak, Blake Chambers, Theodora Skeadas, Tuesday, Kingsley Owadara, Aayush Dhanotiya
https://arxiv.org/abs/2509.20099

Cascade! Human in the loop shortcomings can increase the risk of failures in recommender systems
Recommender systems are among the most commonly deployed systems today. Systems design approaches to AI-powered recommender systems have done well to urge recommender system developers to follow more intentional data collection, curation, and management procedures. So too has the "human-in-the-loop" paradigm been widely adopted, primarily to address the issue of accountability. However, in this paper, we take the position that human oversight in recommender system design also entails novel risk…

Let's travel the eco way… oh, wait.
PKP #InterCity app.

I've just discovered that #Google Meet actually "supports" my browser (#Firefox). I just need not to be logged in into the Google account from dayjob. Once I sign in, it claims it's not supported.

Ok, update on #Google Meet crap. It's not about signing in. It's literally about opening the site for the second time.
I clear cookies. It works once. Once I visit the site again, "unsupported browser".
What a piece of shit.
#Firefox

Here's the new version of "passenger's portal", the timetable app of Polish railways, with even more battery friendly dark mode.
#DesignIsMyPassion #UI #rail

Where do vegetarians eat?
At the vege-table.
#DadJokes

🤚 Wake up in the middle of the night and wonder what time it is
👉 Wake up at 2:30 AM and wonder what timezone it is
#DST

So I'm walking Ruh 🐱 out. She stops at her favorite corner of the wooden garden box to scratch it. I've noticed that His Ekscellence 🐈 is already running around, and sneaking up from the other side of the box. He stops at the other corner and starts looking around it. She also looks around her corner. She starts scratching her corner, he scratches his. Both set themselves in the position to jump out. Ek starts running towards her, she only screams at him once, and midway he changes direction and runs away.
That's the true #cat power.

#TIL that #Szczecin Dąbie has a third platform.
#rail

The existence of broccoli implies the existence of sisccoli.

Just a random reminder that you can't call someone a lunatic, unless their madness is influenced by the moon.

Me: "can this day get any worse?"
A while letter, an aggressive woman boards the train. She reeks of liquor, and is shouting that children in the rear are talking too loud and are "uncultured." At the same time, she's playing loud disco music from phone's loudspeaker.
🤮

Selling people who are down "therapeutic" chatbots is morally equivalent to selling them liquor. Sure, there may be some superficial improvement; but long term, it's an addictive poison.
#AI #LLM

It is oft repeated that you can't solve social problems with technical solutions.
However, there's a flip side to this: you can actually create social problems via technical choices.
#FreeSoftware

A 'shroom.
Near #Kalisz, Western Pomerania.
#forest #mushroom

Average Polish idiot: "you gotta hunt them beavers down!"
City of #Poznań: wraps trees in plastic.
#forest #beaver

#LLVM 21.1.0 now in #Gentoo. This time with #Flang!
#Clang

What the road for donkeys is made from?
Assphalt.
#WordPlay #SłowaNaOpak #suchar #DaddyJoke

One more photo from the archives. This times #Choszczno in Western Pomerania warns about forest fires. 2018.
#forest

Half an hour wait for the next train? Why not walk to the viewing platform in front of #Kłodzko Fortress? You surely won't regret walking all the way up, on these grid gangways and grid fences that make you perfectly aware how high up you are, and with strong wind blowing onto you as soon as you pass the corner.
#hiking

One screenshot, two memes.
Variant 1:
Polish people: going crazy about tickets for 1 PLN.
Me, raised in thriftiness characteristic of Poznań area: "I don't know, 1 PLN is still some money."
Variant 2:
Carbrains: "trains are expensive!"
Me: "are they now? This sounds like a pretty good deal to me."
#rail #InterCity