Negative / Null Result Report
Ray Urbina, null null, null null et al. · 2022 · John Heinrichs Scholarly & Creative Activities Day
In recent years, heart rate has become easier to measure and collect data. Heart rate is a direct measurement of the autonomic nervous system. Therefore, it is utilized in aerobic training to determine an appropriate exercise intensity…
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April Terry, null null, null null et al. · 2022 · John Heinrichs Scholarly & Creative Activities Day
Criminological research has examined the role of neighborhood order in explaining perceptions of crime and official crime statistics for decades. When citizens perceive their neighborhood to be socially and/or physically disordered,…
View details →Negative / Null Result ReportOpen accessComputer Science
J. Luo, Y. X. Nie, Y. Z. Zhang et al. · 2001 · arXiv
The differential acceleration between a rotating mechanical gyroscope and a non-rotating one is directly measured by using a double free-fall interferometer, and no apparent differential acceleration has been observed at the relative level of 2x10{-6}. It means that the equivalence principle is still valid for rotating extended bodies, i.e., the spin-gravity interaction between the extended bodies has not been observed at this level. Also, to the limit of our experimental sensitivity, there is no observed asymmetrical effect or anti-gravity of the rotating gyroscopes as reported by hayasaka et
View details →Negative / Null Result ReportOpen accessPhysics
O. Kochukhov, T. Ryabchikova, J. D. Landstreet et al. · 2004 · arXiv
We describe an analysis of the time-resolved measurements of the surface magnetic field in the roAp star gamma Equ. We have obtained a high-resolution and high S/N spectroscopic time-series, and the magnetic field was determined using Zeeman resolved profiles of the Fe II 6149.25 A and Fe I 6173.34 A lines. Contrary to recent reports we do not find any evidence of magnetic variability with pulsation phase, and derive an upper limit of 5-10 G for pulsational modulation of the surface magnetic field in gamma Equ.
View details →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
View details →Negative / Null Result ReportOpen accessPhysics
Gilles Duvert, Fabien Malbet, Alain Chelli et al. · 2010 · arXiv
We present here a new observational technique, Phase Closure Nulling (PCN), which has the potential to obtain very high contrast detection and spectroscopy of faint companions to bright stars. PCN consists in measuring closure phases of fully resolved objects with a baseline triplet where one of the baselines crosses a null of the object visibility function. For scenes dominated by the presence of a stellar disk, the correlated flux of the star around nulls is essentially canceled out, and in these regions the signature of fainter, unresolved, scene object(s) dominates the imaginary part of th
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Arvin Cruz, null null, null null et al. · 2017 · John Heinrichs Scholarly & Creative Activities Day
Eight platinum(II) biphenyl complexes containing 1,10-phenanthroline derivatives were synthesized and their physical and photophysical properties were examined. X-ray crystal structures were obtained for five of the complexes with two…
View details →Negative / Null Result ReportOpen accessPhysics
G. A. Wade, V. Petit, J. Grunhut et al. · 2014 · arXiv
In the context of the MiMeS survey of magnetism in massive stars, 85 classical Be stars were observed in circular polarization with the aim of detecting magnetic fields at their surfaces. No direct evidence of such fields is found, in contrast to the significant rate of detection (5-10\%) in non-Be B-type stars. In this paper we describe the sample properties, the methodology and the data quality. We describe a novel method, previously applied to Herbig Ae/Be stars, that allows us to infer upper limits on organized (dipolar) magnetic fields present in the photospheres of our targets. We review
View details →Negative / Null Result ReportOpen accessPhysics
Stephen R. Kane, Kaspar von Braun · 2008 · arXiv
The orbital parameters of extra-solar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD 17156b whose favourable eccentricity and argument of periastron dramatically increased its transit likelihood. We present a study which provides a quantitative analysis of how these two orbital parameters effect the geometric transit probability as a function of period. Further, we apply these results to known radial velocity planets and show that there are unexpectedly high transit probabilities for
View details →Negative / Null Result ReportOpen accessComputer Science
P. Migliozzi, F. Terranova · 2003 · arXiv
In this paper we quantify the trade-off between setups optimized to be ancillary to Phase II Superbeams or Neutrino Factories and experiments tuned for maximal sensitivity to the subdominant terms of the neutrino transition probability at the atmospheric scale (``maximum discovery potential''). In particular, the theta(13) sensitivity is computed for both Phase I superbeams (JHF-SK and NuMI Off-Axis) and next generation long baseline experiments (ICARUS, OPERA and MINOS). It is shown that Phase I experiments cannot reach a sensitivity able to ground (or discourage in a definitive manner) the b
View details →Negative / Null Result ReportOpen accessPhysics
Stephen R. Kane, Kaspar von Braun · 2008 · arXiv
The orbital parameters of extra-solar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD 17156b whose favourable eccentricity and argument of periastron dramatically increased its transit likelihood. We present a study which provides a quantitative analysis of how these two orbital parameters affect the geometric transit probability as a function of period. Further, we apply these results to known radial velocity planets and show that there are unexpectedly high transit probabilities for
View details →Negative / Null Result ReportOpen accessPhysics
C. Wigger, W. Hajdas, K. Arzner et al. · 2004 · arXiv
Using the RHESSI satellite as a Compton polarimeter, a recent study claimed that the prompt emission of GRB021206 was almost fully linearly polarized. This was challenged by a subsequent reanalysis. We present an novel approach, applying our method to the same data. We identify Compton scattering candidates by carefully filtering events in energy, time, and scattering geometry. Our polarization search is based on time dependent scattering rates in perpendicular directions, thus optimally excluding systematic errors. We perform simulations to obtain the instrument's polarimetric sensitivity, an
View details →Negative / Null Result ReportOpen accessPhysics
M. Burgay, L. Burderi, A. Possenti et al. · 2003 · arXiv
We have carried out a deep search at 1.4 GHz for radio pulsed emission from six soft X-ray transient sources observed during their X-ray quiescent phase. The commonly accepted model for the formation of the millisecond radio pulsars predicts the presence of a rapidly rotating, weakly magnetized neutron star in the core of these systems. The sudden drop in accretion rate associated with the end of an X-ray outburst causes the Alfvèn surface to move outside the light cylinder, allowing the pulsar emission process to operate. No pulsed signal was detected from the sources in our sample. We discus
View details →Negative / Null Result ReportOpen accessComputer Science
Piero Ullio, Marc Kamionkowski, Petr Vogel · 2000 · arXiv
We investigate whether the annual modulation observed in the DAMA experiment can be due to a weakly-interacting massive particle (WIMP) with an axial-vector (spin-dependent; SD) coupling to nuclei. We evaluate the SD WIMP-proton cross section under the assumption that such scattering accounts for the DAMA modulation, and we do the same for a SD WIMP-neutron cross section. We show that SD WIMP-proton scattering is ruled out in a model-independent fashion by null searches for energetic neutrinos from WIMP annihilation in the Sun, and that SD WIMP-neutron scattering is ruled out for WIMP masses >
View details →Negative / Null Result ReportOpen accessPhysics
Sohan Ghodla · 2024 · arXiv
The upcoming LISA mission will be able to detect gravitational waves from galactic and extragalactic compact binaries. Here, we report on LISA's capability to probe dark matter around these binaries if the latter constitute black holes. By analyzing the variation in the chirp mass of the binary, we show that depending on the black hole masses, LISA should be able to probe their surrounding dark matter to a luminosity distance of $\approx 1$ Gpc if such binaries are observed within the inner $\approx 10$ pc of their galactic center for particle-like dark matter or near the galactic solitonic co
View details →Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance
Murad Farzulla · 2026 · arXiv
This study investigates whether cryptocurrency whitepaper narratives align with empirically observed market factor structure. We construct a pipeline combining zero-shot NLP classification of 38 whitepapers across 10 semantic categories with CP tensor decomposition of hourly market data (49 assets, 17,543 timestamps). Using Procrustes rotation and Tucker's congruence coefficient (phi), we find weak alignment between claims and market statistics (phi = 0.246, p = 0.339) and between claims and latent factors (phi = 0.058, p = 0.751). A methodological validation comparison (statistics versus fact
View details →Negative / Null Result ReportOpen accessPhysics
Eugene A. Lim, Dennis Simon · 2011 · arXiv
In this paper, we investigate the utility of Minkowski Functionals as a probe of cold/hot disk-like structures in the CMB. In order to construct an accurate estimator, we resolve a long-standing issue with the use of Minkowski Functionals as probes of the CMB sky -- namely that of systematic differences ("residuals") when numerical and analytical MF are compared. We show that such residuals are in fact by-products of binning, and not caused by pixelation or masking as originally thought. We then derive a map-independent estimator that encodes the effects of binning, applicable to beyond our pr
View details →Negative / Null Result ReportOpen accessComputer Science
Ciarán Walsh, Emilio Barkett · 2026 · arXiv
Large language models are increasingly used as behavioral simulators, but it remains unclear when their outputs reflect human-like cognitive mechanisms rather than prompt-sensitive surface patterns. We study this question through the realization effect, a well-characterized finding in behavioral economics in which risk-taking differs systematically after paper versus realized gains and losses. We evaluate LLM behavior at three levels: prompt-only behavioral sensitivity, linear readout of internal representations, and causal control via activation steering. Prompt-only results show systematic c
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Eugene Chon, Nicholas Stewart, null null et al. · 2020 · John Heinrichs Scholarly & Creative Activities Day
While major changes to chromosomal form is generally deleterious, karyotypes are not static. Major chromosomal rearrangements contribute to genetic isolation and divergence within and between species. As mechanisms that drive these…
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Willow Ludwig, Lauren Stallbaumer, null null et al. · 2023 · John Heinrichs Scholarly & Creative Activities Day
Introduction: Stuttering is a communication disorder that may present difficulties such as producing fluent speech, having a fear of speaking, and experiencing limited inclusion, which. greatly impacts the quality of life and education of…
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Clayton Beutler, Mason Robbins, null null et al. · 2023 · John Heinrichs Scholarly & Creative Activities Day
Baseball is said to be the oldest sport in America and considered to be America’s past time. Since the beginning, significant amounts of statistics and data have been recorded to examine a team’s wins, batting average, on-base percentage,…
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Hope Schuman, Mason Ibarra, null null et al. · 2023 · John Heinrichs Scholarly & Creative Activities Day
COVID-19, also known as coronavirus disease of 2019, is a virus that was first discovered in December of 2019. Symptoms of COVID-19 feel much like the flu, a cold, and pneumonia. In this report we analyzed how a country's gross domestic…
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Alicia Utley, Christine Hober, null null et al. · 2020 · John Heinrichs Scholarly & Creative Activities Day
Obesity is becoming a widely known health disparity, affecting over 300 million people worldwide. Obesity is associated with multiple comorbidities, many of which are categorized as leading causes of death in the United States. Citizens in…
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Steven Bolin, Brooke Mann, null null et al. · 2019 · John Heinrichs Scholarly & Creative Activities Day
Mental health stigma is defined as stereotypes and prejudice resulting from misconceptions about mental illness (Corrigan Watson, 2002 Boor 1978 found simulated college voters cast fewer votes for a candidate when it was known the…
View details →Negative / Null Result ReportMedicine
Martiren, Llaguno-Rubio, Fiori-Chincaro et al. · 2026 · Journal of clinical and experimental dentistry
To evaluate the morphological characteristics of hypercementosis and its association with local factors using cone beam computed tomography (CBCT) in a population from Uruguay. This observational, cross-sectional, retrospective study…
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Nadine Haase, Stefan Hupfer, Michaela Golic et al. · 2013 · Hypertension
We investigated whether or not Relaxin ameliorates the hypertension induced damage to heart and kidney. We used double transgenic rats harboring both human renin and angiotensinogen genes (dTGRs). These rats develop moderately severe…
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Tyee Kenneth Fellows, Sabina Freiman, Vladimir Ljubojevic et al. · 2020 · Canadian Medical Education Journal
Background: With the increasing awareness and action amongst stakeholders in addressing the concerning rise of unmatched Canadian Medical Graduates (CMGs), little is known from those who go unmatched. We use our unmatched experience to…
View details →Negative / Null Result ReportMedicine
Bieglecka, Kęszycka, Czerwińska et al. · 2026 · Nutrients
Patients with psoriasis, a non-contagious, chronic, systemic inflammatory skin disease, often suffer from carbohydrate metabolism disorders, which can exacerbate systemic inflammation. This randomized, double-blind, placebo-controlled…
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Abigail Silva, Arielle Guzman, Charlotte Picard et al. · 2020 · Cancer Epidemiology, Biomarkers & Prevention
Abstract Background: Through its various provisions, the Patient Protection and Affordable Care Act (ACA) has the potential to increase access to cancer care, particularly among the most vulnerable, and reduce disparities in cancer care…
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Siobhan Dickinson, Maryam Naghsh‐Nejad, Kees Van Gool et al. · 2026 · Australian Economic Review
ABSTRACT Research Question/Issue This study examines the impact of the Chronic Disease Dental Scheme (CDDS), introduced in 2007 to provide subsidised dental care for people with chronic conditions. Specifically, it asks whether the CDDS…
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