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Physics Preprint PDF DOI

Topological antiqued mechanical toy

Hirofumi Wada, Hayato Mizobata, Shuto Ueno, Taiju Yoneda · 2026

{\it Jacob's ladder} -- a classic children's toy -- is a simple mechanical frame comprising rigid blocks connected by strings that shows curious unidirectional flipping waves. Nonetheless, its physica…

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Computer Science Preprint PDF DOI

Exact Dynamic Programming for Solow--Polasky Diversity Subset Selection on Lines and Staircases

Michael T.M. Emmerich · 2026

We study exact fixed-cardinality Solow--Polasky diversity subset selection on ordered finite $\ell_1$ sets, with monotone biobjective Pareto fronts and their higher-dimensional staircase analogues as …

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Physics Preprint PDF DOI

Studying spherical collapse and its implications in the Eddington-inspired Born-Infeld gravity theory

A. M Velasquez-Toribio · 2026

We investigate spherical collapse in Eddington-inspired Born--Infeld (EiBI) gravity in the subhorizon, pressureless, and quasi-static regime, emphasizing the matter-gradient correction that appears in…

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Engineering Preprint PDF DOI

A 21-24 GHz Low-Phase-Noise mmWave VCO with Third-Harmonic Expansion using a Triple-Coupled Transformer based Tank

Narahari N. Moudhgalya · 2026

This work presents the design and analysis of a sixth-order triple-coupled transformer-based tank, enabling third-harmonic expansion for mmWave VCOs. Unlike conventional fourth-order tanks, the propos…

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Physics Preprint PDF DOI

Learning Neural Operator Surrogates for the Black Hole Accretion Code

Matthias Nagele, Cedric Bos, Chester Tan, Christian M. Fromm, Ingo Scholtes, Karl Mannheim · 2026

General-relativistic magnetohydrodynamic (GR-MHD) simulations are essential for studying black hole accretion, relativistic jets, and magnetic reconnection, yet their computational cost severely limit…

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Engineering Preprint PDF DOI

Cross-Linguistic Rhythmic and Spectral Feature-Based Analysis of Nyishi and Adi: Two Under-Resourced Languages of Arunachal Pradesh

Deepshikha Gogoi, Parismita Gogoi, Yang Saring · 2026

Under-resourced languages remain underrepresented in quantitative rhythm research,particularly in systematic intra-branch analysis of acoustic differentiation within closely related linguistic groups.…

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Physics Preprint PDF DOI

From wake dynamics to energy consumption in free-swimming biohybrid robotic jellyfish: a multiscale analysis

Simon R. Anuszczyk, Kyra Phaychanpheng, John O. Dabiri · 2026

Measuring energy consumption of marine organisms often requires enclosing the animal in a small, sealed chamber to quantify changes in oxygen concentration of the surrounding water. This can limit mea…

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Engineering Preprint PDF DOI

Wave Tank Experiment for Sea State Monitoring with Distributed Acoustic Sensing

Yoshiyuki Yajima, Sakiko Mishima, Noriyuki Tonami, Tomoyuki Hino, Shugo Aibe, Junichiro Saikawa, Koji Mizuguchi · 2026

Monitoring sea states across the offshore wind farm areas is essential to keep their structures safe, efficiently operate the systems, and assess the environmental effects of wind turbines. Convention…

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Engineering Preprint PDF DOI

Monitoring exposure-length variations in submarine power cables using distributed fiber-optic sensing

Sakiko Mishima, Yoshiyuki Yajima, Noriyuki Tonami, Tomoyuki Hino, Shugo Aibe, Junichiro Saikawa, Koji Mizuguchi · 2026

This study proposes an anomaly-detection framework for monitoring exposure-length variations in submarine free-span cables using Distributed Acoustic Sensing (DAS), which is one of the distributed fib…

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Engineering Preprint PDF DOI

Deep Learning-Enabled Dissolved Oxygen Sensing in Biofouling Environments for Ocean Monitoring

Nikolaos Salaris, Adrien Desjardins, Manish K. Tiwari · 2026

The escalating climate crisis and ecosystem degradation demand intelligent, low-cost sensors capable of robust, long-term monitoring in real-world environments. Absolute dissolved oxygen (DO) concentr…

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Computer Science Preprint PDF DOI

Hardware-Efficient FPGA Implementation of Sigmoid Function Using Mixed-Radix Hyperbolic Rotation CORDIC

Chintan Panchal, Ankur Changela, Mohendra Roy · 2026

Efficient hardware implementation of nonlinear activation functions is a crucial task in deploying artificial neural networks on resource-constrained and edge devices such as Field-Programmable Gate A…

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AI & Data Science Preprint PDF DOI

When Does Removing LayerNorm Help? Activation Bounding as a Regime-Dependent Implicit Regularizer

Lucky Verma · 2026

Dynamic Tanh (DyT) removes LayerNorm by bounding activations with a learned tanh(alpha x). We show that this bounding is a regime-dependent implicit regularizer, not a uniformly beneficial replacement…

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Physics Preprint PDF DOI

Quantum-information diagnostics of cosmological perturbations with nontrivial sound speed in inflation

Shi-Cheng Liu, Lei-Hua Liu, Bichu Li, Hai-Qing Zhang, Peng-Zhang He · 2026

In this work, we systematically investigate the quantum-information diagnostics of cosmological perturbations with a nontrivial sound speed, utilizing a normalized open two-mode squeezed-state framewo…

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Physics Preprint PDF DOI

A Complex-Valued Continuous-Variable Quantum Approximation Optimization Algorithm (CCV-QAOA)

Raneem Madani (L2S), Abdel Lisser (L2S), Zeno Toffano (L2S) · 2026

Continuous-variable (CV) quantum systems offer a natural framework for continuous optimization through their infinite-dimensional Hilbert spaces. In this paper, we propose the Complex Continuous-Varia…

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AI & Data Science Preprint PDF DOI

Cross-Entropy Is Load-Bearing: A Pre-Registered Scope Test of the K-Way Energy Probe on Bidirectional Predictive Coding

Jon-Paul Cacioli · 2026

Cacioli (2026) showed that the K-way energy probe on standard discriminative predictive coding networks reduces approximately to a monotone function of the log-softmax margin. The reduction rests on f…

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AI & Data Science Preprint PDF DOI

BALTIC: A Benchmark and Cross-Domain Strategy for 3D Reconstruction Across Air and Underwater Domains Under Varying Illumination

Michele Grimaldi, David Nakath, Oscar Pizarro, Jonatan Scharff Willners, Ignacio Carlucho, Yvan R. Petillot · 2026

Robust 3D reconstruction across varying environmental conditions remains a critical challenge for robotic perception, particularly when transitioning between air and water. To address this, we introdu…

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Physics Preprint PDF DOI

Holographic dark energy as a source for slowly rotating wormholes: Implications for null geodesics and shadows

A. Errehymy, S. K. Maurya, M. Govender, K. N. Singh, J. Rayimbaev, B. Myrzakulova, S. Murodov · 2026

In this work, we explore for the first time slowly rotating traversable wormholes embedded in holographic dark energy. We focus on three representative holographic dark energy models -- R\'{e}nyi, mix…

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Mathematics Preprint PDF DOI

Positive and negative 3-energies of graphs

Zhengbo Chen, Zhouningxin Wang, Xiao-Dong Zhang · 2026

For a simple graph $G$ with $n$ vertices, let $A_G$ denote the adjacency matrix of $G$, and let $\lambda_1(G) \geq \lambda_2(G) \geq \dots \geq \lambda_n(G)$ be its eigenvalues. For an integer $p \geq…

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Biology & Life Sciences Preprint PDF DOI

PUFFIN: Protein Unit Discovery with Functional Supervision

Gokce Uludogan, Buse Giledereli, Elif Ozkirimli, Arzucan Ozgur · 2026

Proteins carry out biological functions through the coordinated action of groups of residues organized into structural arrangements. These arrangements, which we refer to as protein units, exist at an…

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Physics Preprint PDF DOI

Constraining Quintessential Inflation with ACT: A Gauss-Bonnet Gateway

Yogesh, Imtiyaz Ahmad Bhat, Mayukh R. Gangopadhyay, M. Sami · 2026

Recent results from the Atacama Cosmology Telescope (ACT), indicating a higher and more tightly constrained scalar spectral index, $n_s = 0.9743 \pm 0.0034$, place several inflationary models under te…

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