Failed Experiment Report
Haneen Mahdi Jaber, Muhammed Abdul -Sattar, Nabel Kadhim Abd al-Sahib · 2020 · Al-Khwarizmi Engineering Journal
Prosthetic is an artificial tool that replaces a member of the human frame that is absent because of ailment, damage, or distortion. The current research activities in Iraq draw interest to the upper limb discipline because of the growth…
View details →DOI: 10.22153/kej.2020.04.001 Failed Experiment ReportMedicine
Wang, Yan, Qi et al. · 2026 · Zhongguo xue xi chong bing fang zhi za zhi = Chinese journal of schistosomiasis control
To prepare the recombinant Echinococcus granulosus Polo-like kinase 2 (rEgPLK2) protein and evaluate its immunoprotective efficacy against cystic echinococcosis, so as to provide insights into research and development of novel vaccines…
View details →DOI: 10.16250/j.32.1915.2026005 Failed Experiment Report
Alexandre Tchoudinov · 2021 · ISTORIYA
The article is devoted to the problem of cross-cultural interaction between the French and the Arabs during the Egyptian expedition of Napoleon Bonaparte 1798—1801. Using a comparative analysis of a wide range of French sources and Arab…
View details →DOI: 10.18254/s207987840015129-0 Failed Experiment ReportOpen accessEngineering
Ramin Babaee, Shahab Oveis Gharan, Martin Bouchard · 2025 · arXiv
We propose a novel digital-to-analog converter (DAC) weighting architecture that statistically minimizes the distortion caused by random timing mismatches among current sources. To decode the DAC input codewords into corresponding DAC switches, we present three algorithms with varying computational complexities. We perform high-level Matlab simulations to illustrate the dynamic performance improvement over the segmented structure.
Failed Experiment ReportOpen accessComputer Science
Antoine Suarez · 2014 · arXiv
A Michelson-Morley-type experiment is described, which exploits two-photon interference between entangled photons instead of classical light interference. In this experimental context, the negative result (no shift in the detection rates) rules out David Bohm's postulate of an infinite-speed time-ordered "quantum potential", and thereby upholds the timeless standard quantum collapse.
Failed Experiment ReportOpen accessMathematics
Saharon Shelah · 2001 · arXiv
David Aspero asks on the possibility of having Forcing axiom FA_{aleph_2}(K), where K is the class of forcing notions preserving stationarity of subsets of aleph_1 and of aleph_2. We answer negatively, in fact we show the negative result for any regular lambda>aleph_1 even demanding adding no new sequence of ordinals of length<lambda.
Failed Experiment ReportOpen accessMathematics
Michael Joachim, Thomas Schick · 1999 · arXiv
The Gromov-Lawson-Rosenberg-conjecture for a group G states that a closed spin manifold M^n (n>4) with fundamental group G admits a metric with positive scalar curvature if and only if its C^*-index A(M) in KO_n(C^*_r(G)) vanishes. We prove this for groups G with low-dimensional classifying space, provided the assembly map for G is injective. On the other hand, we construct a spin manifold with no metric with scal>0 but so that already its KO-orientation in KO_*(B pi_1(M)) vanishes. Therefore a corresponding weakened version or the GLR-conjecture is wrong. Last we address non-orientable manifo
Failed Experiment ReportOpen accessComputer Science
David Berenstein · 2006 · arXiv
This paper studies the compatibility of having a grand unification scheme for particle physics, while at the same time having a perturbative string theory description of such a scheme on a D-brane. This is studied in a model independent approach and finds a negative result. Some additional observations related to model building on branes are made.
Failed Experiment ReportOpen accessPhysics
A. Yu. Samarin · 2017 · arXiv
It is described a nonlocal interaction between entangled quantum objects, which is initiated by a process different from the reduction of the wave function. The scheme of an experiment realizing a deterministic nonlocal quantum evolution is proposed. In the case of the negative result of the experiment, the universal character of the integral wave equation with a kernel in the form of a path integral is questionable, otherwise faster-then-light communication is possible
Failed Experiment ReportOpen accessMathematics
Jake A. Soloff, Adityanand Guntuboyina, Michael I. Jordan · 2020 · arXiv
We study the problem of high-dimensional covariance estimation under the constraint that the partial correlations are nonnegative. The sign constraints dramatically simplify estimation: the Gaussian maximum likelihood estimator is well defined with only two observations regardless of the number of variables. We analyze its performance in the setting where the dimension may be much larger than the sample size. We establish that the estimator is both high-dimensionally consistent and minimax optimal in the symmetrized Stein loss. We also prove a negative result which shows that the sign-constrai
Failed Experiment ReportOpen accessMathematics
Birgit Richter · 2005 · arXiv
We provide a lower bound for the coherence of the homotopy commutativity of the Brown-Peterson spectrum, BP, at a given prime p and prove that it is at least (2p^2 + 2p - 2)-homotopy commutative. We give a proof based on Dyer-Lashof operations that BP cannot be a Thom spectrum associated to n-fold loop maps to BSF for n=4 at 2 and n=2p+4 at odd primes. Other examples where we obtain estimates for coherence are the Johnson-Wilson spectra, localized away from the maximal ideal and unlocalized. We close with a negative result on Morava-K-theory.
Failed Experiment ReportOpen accessPhysics
S. I. Vavilov · 2017 · arXiv
English translation of a Russian article from 1928. Translator's abstract: The article presents general considerations on the validity of the superposition principle for light in vacuo from out a quantum theoretic point of view. It contains a report on an optical experiment designed to detect the phenomenon of photon-photon scattering. To understand the negative result of the performed experiment, a consideration of the solar corona is undertaken in order to derive an empirical upper limit on the photon-photon scattering rate. Source details: S. I. Vavilov: Zamechaniya ob empiricheskoi tochnos
Failed Experiment ReportOpen accessAgricultural and Biological Sciences
M. Khasin, M. I. Dykman, B. Meerson · 2009 · arXiv
We consider optimal vaccination protocol where the vaccine is in short supply. In this case, disease extinction results from a large and rare fluctuation. We show that the probability of such fluctuation can be exponentially increased by vaccination. For periodic vaccination with fixed average rate, the optimal vaccination protocol is model independent and presents a sequence of short pulses. The effect of vaccination can be resonantly enhanced if the pulse period coincides with the characteristic period of the disease dynamics or its multiples. This resonant effect is illustrated using a simp
Failed Experiment ReportOpen accessMathematics
P. F. Tupper · 2006 · arXiv
We consider the numerical simulation of Hamiltonian systems of ordinary differential equations. Two features of Hamiltonian systems are that energy is conserved along trajectories and phase space volume is preserved by the flow. We want to determine if there are integration schemes that preserve these two properties for all Hamiltonian systems, or at least for all systems in a wide class. This paper provides provides a negative result in the case of two dimensional (one degree of freedom) Hamiltonian systems, for which phase space volume is identical to area. Our main theorem shows that there
Failed Experiment ReportOpen accessComputer Science
Yuri Ozhigov · 2019 · arXiv
Experimental attempts to implement quantum speedup of computations over the past 30 years have yielded a negative result, despite the absence of physical laws prohibiting such speedup. The article formulates the limitation of quantum formalism in the form of uncertainty "the complexity of the system - the accuracy of its description at the quantum level", and provides arguments in favor of its physical status. An experiment to determine this constant through Grover's algorithm is described. Rough estimates on the constant of this ratio are given, based on the possibility of applying the quantu
Failed Experiment ReportOpen accessMathematics
Karine Beauchard, Frédéric Marbach, Thomas Perrin · 2025 · arXiv
We study the small-time local controllability (STLC) of a bilinear Schrödinger equation with Neumann boundary conditions near its ground state. We focus on the degenerate case where the linearized system is not controllable, necessitating a second-order analysis. We prove two complementary results. The negative result provides a new PDE instance of Sussmann's classical quadratic obstruction, corresponding to a non-vanishing Lie bracket. The positive result appears to be the first to establish STLC at the quadratic order for a physical PDE with a single scalar control. Both proofs rely on a Fou
Failed Experiment Report
Andy Kuhl, null null, null null et al. · 2022 · John Heinrichs Scholarly & Creative Activities Day
The goal of this experiment was to reduce spin on an unmanned balloon as the altitude increases. This problem had been discovered after the initial flight, where the rotation of the Go-Pro camera was nearly sickening. After more research,…
View details →DOI: 10.58809/hwrp3471 Failed Experiment Report
Jared Ridder, null null, null null et al. · 2017 · John Heinrichs Scholarly & Creative Activities Day
Previous worksup1-6/sup on an initial model system for the synthesis of polyaromatic dyes for potential use in solar energy collection used the Doebner modified Knoevenagel condensation. This project is continuing the work on this approach…
View details →DOI: 10.58809/ivya6891 Failed Experiment Report
Seojoon Park, Paul Adams, null null et al. · 2020 · John Heinrichs Scholarly & Creative Activities Day
Every person would have thought of this idea of launching aballoon high up in the sky in their youth, and that is exactlywhat we did. We filled a large elastic balloon filled withhelium and flew it high up into the sky until it popped…
View details →DOI: 10.58809/kqgl3096 Failed Experiment Report
Matthew Boyea, null null, null null et al. · 2022 · John Heinrichs Scholarly & Creative Activities Day
Modern manufacturing processes increasingly demand machine driven solutions When developing robot applications in industry, programmers must be able to safely write code which is reusable, expandable, and well documented This case study…
View details →DOI: 10.58809/ptsh7036 Failed Experiment ReportOpen accessComputer Science
G. Hathaway, L. L. Williams · 2021 · arXiv
We report test results searching for an effect of electrostatic charge on weight. For conducting test objects of mass of order 1 kilogram, we found no effect on weight, for potentials ranging from 10 V to 200 kV, corresponding to charge states ranging from $10^{-9}$ to over $10^{-5}$ coulombs, and for both polarities, to within a measurement precision of 2 grams. While such a result may not be unexpected, this is the first unipolar, high-voltage, meter-scale, static test for electro-gravitic effects reported in the literature. Our investigation was motivated by the search for possible coupling
Failed Experiment ReportOpen accessPhysics
D. Bojiloff, M. Tajmar · 2015 · arXiv
In the year 2002 publications of A.V.M. Khachatourian and A.O. Wistrom were released, in which the existence of an electrostatic torque has been claimed. This moment of force should act in a three sphere configuration, where one sphere is held at a constant electric potential. This claim was based on an observed rotation and was supported by a mathematical solution derived by Wistrom and Khachatourian. The theoretical work of Wistrom and Khachatourian as well as the interpretation of the observed rotation were criticized by several scientists who offered alternative explanations for the rotati
Failed Experiment Report
Omar S. Aljitawi, Jeff Radel, Bruce Kimler et al. · 2011 · Blood
Abstract Abstract 4695 Introduction: UCB is also an attractive stem cell source for transplantation because of the ease of procurement, the absence of donor risks, and reduced risk of transmissible infections. Unfortunately, outcomes of…
View details →DOI: 10.1182/blood.v118.21.4695.4695 Failed Experiment Report
Adam Wilson · 2012 · Journal of Petroleum Technology
This article, written by Editorial Manager Adam Wilson, contains highlights of paper SPE 151518, ’Automated Managed-Pressure Drilling Allows Identification of New Reserves in an HP/HT Exploration Well in SB Field, Offshore Malaysia,’ by…
View details →DOI: 10.2118/0912-0113-jpt Failed Experiment Report
J. Stöhr, L. Maurer, B. Zimmer et al. · 2016 · Reproduction, Fertility and Development
In humans, intracytoplasmic sperm injection (ICSI) has become widely applied to overcome infertility. In addition to its clinical usefulness, ICSI is also a valuable research tool for studying fundamental aspects of gamete interaction…
View details →DOI: 10.1071/rdv29n1ab128 Failed Experiment Report
Kyle Admire, Stephen Gegick · 2026 · BMJ Case Reports
Tumours within the pulmonary arteries provide a diagnostic challenge due to their similar appearance to pulmonary emboli. Often, the decision to sample is multidisciplinary and the best approach to take is often unknown. Here we describe a…
View details →DOI: 10.1136/bcr-2025-268157 Failed Experiment Report
· 2015 · Strategic Direction
Purpose – This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach – This briefing is prepared by an…
View details →DOI: 10.1108/sd-12-2014-0178 Failed Experiment ReportOpen accessPhysics
Khadijeh Najafi, M. A. Rajabpour · 2017 · arXiv
In a recent letter, J. Cardy, Phys. Rev. Lett. \textbf{112}, 220401 (2014), the author made a very interesting observation that complete revivals of quantum states after quantum quench can happen in a period which is a fraction of the system size. This is possible for critical systems that can be described by minimal conformal field theories (CFT) with central charge $c<1$. In this article, we show that these complete revivals are impossible in microscopic realizations of those minimal models. We will prove the absence of the mentioned complete revivals for the critical transverse field Ising
Failed Experiment ReportOpen accessComputer Science
Frits de Nijs, Daan Wilmer · 2012 · arXiv
The goal of this paper is to critically evaluate a heuristic algorithm for the Inverse Banzhaf Index problem by Laruelle and Widgrén. Few qualitative results are known about the approximation quality of the heuristics for this problem. The intuition behind the operation of this approximation algorithm is analysed and evaluated. We found that the algorithm can not handle general inputs well, and often fails to improve inputs. It is also shown to diverge after only tens of iterations. We present three alternative extensions of the algorithm that do not alter the complexity but can result in up t
Failed Experiment ReportOpen accessPhysics
Nicolas Tancogne-Dejean, Martin Lüders, Carsten A. Ullrich · 2023 · arXiv
We extend some of the well established self-interaction correction (SIC) schemes of density-functional theory to the case of systems with noncollinear magnetism. Our proposed SIC schemes are tested on a set of molecules and metallic clusters in combination with the widely used local spin-density approximation. As expected from the collinear SIC, we show that the averaged-density SIC works well for improving ionization energies but fails to improve more subtle quantities like the dipole moments of polar molecules. We investigate the exchange-correlation magnetic field produced by our extension
