Negative / Null Result ReportOpen accessComputer Science
Cristopher Moore, Alexander Russell, Piotr Sniady · 2006 · arXiv
It is known that any quantum algorithm for Graph Isomorphism that works within the framework of the hidden subgroup problem (HSP) must perform highly entangled measurements across Ω(n \log n) coset states. One of the only known models for how such a measurement could be carried out efficiently is Kuperberg's algorithm for the HSP in the dihedral group, in which quantum states are adaptively combined and measured according to the decomposition of tensor products into irreducible representations. This ``quantum sieve'' starts with coset states, and works its way down towards representations whos
Negative / Null Result ReportOpen accessComputer Science
Esther Ezra, Micha Sharir · 2021 · arXiv
We consider several problems that involve lines in three dimensions, and present improved algorithms for solving them. The problems include (i) ray shooting amid triangles in $R^3$, (ii) reporting intersections between query lines (segments, or rays) and input triangles, as well as approximately counting the number of such intersections, (iii) computing the intersection of two nonconvex polyhedra, (iv) detecting, counting, or reporting intersections in a set of lines in $R^3$, and (v) output-sensitive construction of an arrangement of triangles in three dimensions. Our approach is based on the
Negative / Null Result ReportOpen accessComputer Science
A. N. Antonov, M. V. Ivanov, M. K. Gaidarov et al. · 2006 · arXiv
The scaling function $f(ψ')$ for medium and heavy nuclei with $Z\neq N$ for which the proton and neutron densities are not similar is constructed within the coherent density fluctuation model (CDFM) as a sum of the proton and neutron scaling functions. The latter are calculated in the cases of $^{62}$Ni, $^{82}$Kr, $^{118}$Sn, and $^{197}$Au nuclei on the basis of the corresponding proton and neutron density distributions which are obtained in deformed self-consistent mean-field Skyrme HF+BCS method. The results are in a reasonable agreement with the empirical data from the inclusive electron
Negative / Null Result ReportOpen accessEngineering
George Sterpu, Christian Saam, Naomi Harte · 2020 · arXiv
Audio-Visual Speech Recognition (AVSR) seeks to model, and thereby exploit, the dynamic relationship between a human voice and the corresponding mouth movements. A recently proposed multimodal fusion strategy, AV Align, based on state-of-the-art sequence to sequence neural networks, attempts to model this relationship by explicitly aligning the acoustic and visual representations of speech. This study investigates the inner workings of AV Align and visualises the audio-visual alignment patterns. Our experiments are performed on two of the largest publicly available AVSR datasets, TCD-TIMIT and
Negative / Null Result ReportOpen accessComputer Science
Raghav Gupta, Akanksha Jain, Abraham Gonzalez et al. · 2026 · arXiv
Agile hardware design flows are a critically needed force multiplier to meet the exploding demand for compute. Recently, agentic generative AI systems have demonstrated significant advances in algorithm design, improving code efficiency, and enabling discovery across scientific domains. Bridging these worlds, we present ArchAgent, an automated computer architecture discovery system built on AlphaEvolve. We show ArchAgent's ability to automatically design/implement state-of-the-art (SoTA) cache replacement policies (architecting new mechanisms/logic, not only changing parameters), broadly withi
Negative / Null Result ReportOpen accessComputer Science
Adam Karczmarz · 2021 · arXiv
We consider the directed minimum weight cycle problem in the fully dynamic setting. To the best of our knowledge, so far no fully dynamic algorithms have been designed specifically for the minimum weight cycle problem in general digraphs. One can achieve $\tilde{O}(n^2)$ amortized update time by simply invoking the fully dynamic APSP algorithm of Demetrescu and Italiano [J. ACM'04]. This bound, however, yields no improvement over the trivial recompute-from-scratch algorithm for sparse graphs. Our first contribution is a very simple deterministic $(1+ε)$-approximate algorithm supporting vertex
Negative / Null Result ReportOpen accessComputer Science
Amy Zhang, Shagun Sodhani, Khimya Khetarpal et al. · 2020 · arXiv
Many control tasks exhibit similar dynamics that can be modeled as having common latent structure. Hidden-Parameter Markov Decision Processes (HiP-MDPs) explicitly model this structure to improve sample efficiency in multi-task settings. However, this setting makes strong assumptions on the observability of the state that limit its application in real-world scenarios with rich observation spaces. In this work, we leverage ideas of common structure from the HiP-MDP setting, and extend it to enable robust state abstractions inspired by Block MDPs. We derive instantiations of this new framework f
Negative / Null Result ReportOpen accessComputer Science
Richard G. Clegg · 2006 · arXiv
The aim of this paper is to use a very simple queuing model to compare a number of models from the literature which have been used to replicate the statistical nature of internet traffic and, in particular, the long-range dependence of this traffic. The four models all have the form of discrete time Markov-modulated processes (two other models are introduced for comparison purposes). While it is often stated that long-range dependence has a critical effect on queuing performance, it appears that the models used here do not well replicated the queuing performance of real internet traffic. In pa
Negative / Null Result Report
Lidia Oktamarina, Wahidatul Khasanah, Yosi Amanda et al. · 2024 · SIGNIFICANT : Journal Of Research And Multidisciplinary
Penelitian Ini Berjudul Pelaksanaan Asesmen Dalam Perkembngan Motorik Halus Di Tk Putra 1 Palembang. Masalah dalam penelitian ini adalah bagaimana Pelaksanaan Asesmen Dalam Perkembngan Motorik Halus Di Tk Putra 1 Palembang. Penelitian ini…
View details →DOI: 10.62668/significant.v3i01.881 Negative / Null Result Report
Rasha S Farag, Aditya S Kalluri, Geetha Iyer et al. · 2025 · BMJ Paediatrics Open
Background Limited evidence exists on the additive risk of bradycardia in children with respiratory syncytial virus (RSV) bronchiolitis receiving dexmedetomidine (DMED). We aim to study the association between RSV bronchiolitis and…
View details →DOI: 10.1136/bmjpo-2025-003625 Negative / Null Result Report
Dwita Permatasari, Hendrian Dwikoloso Soebagjo, Ismi Zuhria et al. · 2021 · The Indonesian Biomedical Journal
BACKGROUND: Usually, surgical intervention is needed to eradicate the fungal microorganism that cause fungal corneal ulcers. However, since surgical intervention is invasive, the latest technology uses cryotherapy in treating it.…
View details →DOI: 10.18585/inabj.v13i3.1516 Negative / Null Result ReportOpen accessComputer Science
Dillon Niederhut · 2023 · arXiv
Over the last decade, deep neural networks have achieved state of the art in computer vision tasks. These models, however, are susceptible to unusual inputs, known as adversarial examples, that cause them to misclassify or otherwise fail to detect objects. Here, we provide evidence that the increasing success of adversarial attacks is primarily due to increasing their size. We then demonstrate a method for generating the largest possible adversarial patch by building a adversarial pattern out of repeatable elements. This approach achieves a new state of the art in evading detection by YOLOv2 a
Negative / Null Result Report
Jatrya , Sampe Hotlan Sitorus , Uray Ristian · 2020 · Coding Jurnal Komputer dan Aplikasi
Citra telah diterapkan dalam kehidupan sehari-hari. Penerapannya pada bidang kesehatan, pendidikan, hiburan,seni, hukum, dan bisnis. Citra dapat disisipkan pesan rahasia. Penyisipan tersebut disebut sebagai teknik steganografi. Teknik…
View details →DOI: 10.26418/coding.v8i1.39195 Negative / Null Result Report
Uchechi Vanessa Alintah-Abel, Francisca Nkachukwu Okeke, Eucharia Chika Enebe · 2025 · British Journal of Multidisciplinary and Advanced Studies
The goal of most countries is the desire to maintain a stable price level of goods and services. This however, appears to be an uphill task given the incidence of subsidy removal that is presently ravaging the developing economies of the…
View details →DOI: 10.37745/bjmas.2022.04253 Negative / Null Result Report
Dennys De La Torre, Jaime Luyo, Arturo Ortega · 2024 · Journal of Offshore Mechanics and Arctic Engineering
Abstract When estimating significant wave height and wave power, it is regularly assumed 4 for the spectral estimate factor. It means considering a narrowband wave spectrum. That approach is accurate enough when the spectral broadness…
View details →DOI: 10.1115/1.4064501 Negative / Null Result Report
Indriani Indriani, Astrid Putri Pratiwi, Jauhara Jauhara et al. · 2023 · SIGNIFICANT : Journal Of Research And Multidisciplinary
Upaya menanamkan perilaku yang baik, mulia pada anak merupakan pendidikan karakter pada anak usia dini. Lingkungan dimana anak berada dapat menjadi bagian dari pendidikan karakter anak. Keluarga adalah lingkungan pertama bagi anak sehingga…
View details →DOI: 10.62668/significant.v1i02.650 Negative / Null Result Report
Offdan Narvaez-Guerra, Evan Offord, Mawulorm Denu et al. · 2024 · Circulation
Background: Coronary Computed Tomography Angiography (CCTA) and CT-derived fractional flow reserve (CT-FFR) accurately assess the severity of coronary artery disease. However, the diagnostic accuracy of CT-FFR in patients with low left…
View details →DOI: 10.1161/circ.150.suppl_1.4138602 Negative / Null Result Report
· 2021 · Advances in Bioengineering and Biomedical Science Research
Nowadays metal implants are a major source of metal exposure. Contact allergy to nickel, cobalt and chromium is one of the most prevalent allergic reactions in humans with contact dermatitis; up to 17% of women and 3% of men. Setting up…
View details →DOI: 10.33140/abbsr.04.03.04 Negative / Null Result Report
Mae A. Goldgraben, Anna Git, Oscar Rueda et al. · 2013 · Cancer Research
Abstract In light of the great success of siRNA reagents in modern research, similar reagents have also become increasingly popular to study miRNAs in cancer biology. To explore the endogenous function of a particular miRNA in fine-tuning…
View details →DOI: 10.1158/1538-7445.am2013-lb-243 Negative / Null Result ReportOpen accessMathematics
Itai Benjamini, Alexander Shamov, Barak Weiss · 2026 · arXiv
We present an open problem about non-colliding freely moving hard disks in the Euclidean plane, together with related positive and negative partial results. The open problem is stated in a non-degenerate form: velocities are required to be pairwise distinct and their speeds are required to be uniformly bounded away from infinity. The positive deterministic result gives a bounded, injective, non-colliding velocity assignment for the integer lattice; after a common velocity shift, the speeds are also bounded away from zero. The negative result shows that no bounded continuous vector field on the
Negative / Null Result ReportOpen accessComputer Science
Adam Brandenburger, Pierfrancesco La Mura · 2025 · arXiv
Any quasi-probability representation of a no-signaling system -- including quantum systems -- can be simulated via a purely classical scheme by allowing signed events and a cancellation procedure. This raises a fundamental question: What properties of the non-classical system does such a classical simulation fail to replicate? We answer by using large deviation theory to show that the probability of a large fluctuation under the classical simulation can be strictly greater than under the actual non-classical system. The key finding driving our result is that negativity in probability relaxes t
Negative / Null Result ReportOpen accessComputer Science
Aloïs Rautureau, Éric Piette · 2025 · arXiv
While AI systems have equaled or surpassed human performance in a wide variety of games such as Chess, Go, or Dota 2, describing these systems as truly "human-like" remains far-fetched. Despite their success, they fail to replicate the pattern-based, intuitive decision-making processes observed in human cognition. This paper presents an overview of findings from cognitive psychology and previous efforts to model human-like behavior in artificial agents, discusses their applicability to General Game Playing (GGP) and introduces our work-in-progress model based on these observations: CogniPlay.
Abandoned Hypothesis
Theo van Holten · 2023 · Qeios
Emergent Quantum Mechanics (Em.QM) is defined here as the attempt to bridge the gap between quantum and classical mechanics, and to restore causality to the atomic world. An example described in the paper shows how a conspiracy of the…
View details →DOI: 10.32388/xsw0jl.2 Negative / Null Result ReportMedicine
Sheikhzadeh, Sheikhhoseini, Piri et al. · 2026 · PeerJ
Many yoga poses involve supporting part or all of the body weight on the shoulder girdle and arms, which impose high loadings on the shoulder girdle. The present study aims to investigate the differences in electromyographic (EMG) activity…
View details →DOI: 10.7717/peerj.21356 Negative / Null Result Report
Hassan M. Aljohani, Robert G. Aykroyd · 2025 · Mathematics
It is very common for multiple experiments to be conducted under non-identical but similar conditions, perhaps because of implementation errors, natural variability in experimental material, or gradual drifting of experimental conditions.…
View details →DOI: 10.3390/math13111751 Negative / Null Result ReportMedicine
Iwamoto, Takagawa · 2026 · Scientific reports
Accurate modelling of tropical cyclones (TCs) is essential for reliable storm surge simulations, as TCs provide the primary external forcing. While deep learning models have demonstrated effectiveness in TC modelling, a challenge remains…
View details →DOI: 10.1038/s41598-026-58153-2 Protocol
Ivana Fiore, Francesca Alhaique, Daniela Ferro et al. · 2025 · Archaeofauna
This paper presents the preliminary results of an experimental project aiming at the optimization of the procedures for observing and identifying archaeological bone modifications by means of microscope analysis.The protocol includes…
View details →DOI: 10.15366/archaeofauna2025.34.1.043 Negative / Null Result ReportOpen accessMathematics
S. Stanley Young, Robert L. Obenchain, Christophe Lambert · 2015 · arXiv
It is well-known that claims coming from observational studies often fail to replicate when rigorously re-tested. The technical problems include multiple testing, multiple modeling and bias. Any or all of these problems can give rise to claims that will fail to replicate. There is a need for statistical methods that are easily applied, are easy to understand, and are likely to give reliable results. In particular, simple ways for reducing the influence of bias are essential. In this paper, the Local Control method developed by Robert Obenchain is explicated using a small air quality/longevity
Negative / Null Result Report
Björn Jörges, Laurence R. Harris · 2025 · PLOS One
For many years the accepted wisdom in vision science has been that humans tend to underestimate the speed of an object when they pursue it with their gaze in comparison to when they fixate a spot in the visual scene and the object moves…
View details →DOI: 10.1371/journal.pone.0324420 Negative / Null Result Report
Erik Huesca Burela · 2026 · Revista Mexicana de Economía y Finanzas
This paper aims to determine whether a transparent, vendor-style bond pricing framework built exclusively from public information can match the pricing accuracy of institutional vendors. The methodology constructs Treasury-based yield…
View details →DOI: 10.21919/remef.v21i2.1430 