Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance
Mohammad R. Jahan‐Parvar, Filip Žikeš · 2023 · Review of Financial Studies
Abstract We present evidence that several popular low-frequency measures of effective spread suffer from a volatility-induced bias and that volatility is the primary driver of the variation of these liquidity proxies. Using data for U.S. equities and major foreign exchange rates, we show that the bias arises when the effective spread is small relative to volatility. We document that the bias has become more acute over time and show that volatility-biased measures fail to replicate some well-known results in empirical finance. We conclude by providing guidance on the choice of low-frequency mea
View details →Negative / Null Result ReportPhysics and Astronomy
Zengyou He, Hao Liang, Zheng Chen et al. · 2020 · IEEE Transactions on Knowledge and Data Engineering
Community detection is a key data analysis problem across different fields. During the past decades, numerous algorithms have been proposed to address this issue. However, most work on community detection does not address the issue of…
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Zerrin Önder, İbrahim Çanak, Ümit Totur · 2017 · Open Mathematics
Abstract In this paper, we prove that a bounded double sequence of fuzzy numbers which is statistically convergent is also statistically ( C , 1, 1) summable to the same number. We construct an example that the converse of this statement…
View details →Negative / Null Result ReportPsychology
Kory Floyd, Nathan T. Woo · 2020 · Personal Relationships
Abstract Contrary to the claim that loneliness routinely impairs the decoding of social cues such as emotion displays, Knowles, Lucas, Baumeister, and Gardner (2015) proposed that lonely adults “choke under pressure,” experiencing…
View details →Negative / Null Result ReportOpen accessNeuroscience
Amanda Zieselman, Jonathan Fisher, Ting Hu et al. · 2014 · BioData Mining
BACKGROUND: Alzheimer's disease is the most common form of progressive dementia and there is currently no known cure. The cause of onset is not fully understood but genetic factors are expected to play a significant role. We present here a bioinformatics approach to the genetic analysis of grey matter density as an endophenotype for late onset Alzheimer's disease. Our approach combines machine learning analysis of gene-gene interactions with large-scale functional genomics data for assessing biological relationships. RESULTS: We found a statistically significant synergistic interaction among t
View details →Negative / Null Result ReportOpen accessEnvironmental Science
Aliea M. Jalali, Brent M. Peterson, Thushara Galbadage · 2020 · Frontiers in Public Health
The Coronavirus disease 2019 (COVID-19) pandemic has elicited an abrupt pause in the United States in multiple sectors of commerce and social activity. As the US faces this health crisis, the magnitude and rigor of their initial public health response was unprecedented. As a response, the entire nation shutdown at the state-level for the duration of a ~1-3 months. These public health interventions, however, were not arbitrarily decided, but rather, implemented as a result of evidence-based practices. These practices were a result of lessons learned during the 1918 influenza pandemic and the ci
View details →Negative / Null Result ReportOpen accessMedicine
Bijay Kumar Jha, Sanjay Varikuti, Chaitenya Verma et al. · 2023 · npj Vaccines
Human infection with the protozoan parasite Trypanosoma cruzi causes Chagas disease for which there are no prophylactic vaccines. Cyclophilin 19 is a secreted cis-trans peptidyl isomerase expressed in all life stages of Trypanosoma cruzi. This protein in the insect stage leads to the inactivation of insect anti-parasitic peptides and parasite transformation whereas in the intracellular amastigotes it participates in generating ROS promoting the growth of parasites. We have generated a parasite mutant with depleted expression of Cyp19 by removal of 2 of 3 genes encoding this protein using doubl
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Chunyuan Zhang, Xu Wu, Yanfang Xian et al. · 2019 · Evidence-Based Complementary and Alternative Medicine
Isorhynchophylline (IRN) and rhynchophylline (RN), a pair of stereoisomers, are tetracyclic oxindole alkaloids isolated from Uncaria rhynchophylla , a commonly used Chinese medicinal herb. These two compounds have drawn extensive attention…
View details →Negative / Null Result ReportNeuroscience
Nikoletta Symeonidou, Beatrice G. Kuhlmann · 2021 · Cognition & Emotion
Emotion-enhanced memory (EEM) describes the robust memory advantage of emotional over non-emotional stimuli. While extensively investigated with emotional items, it is unclear whether the EEM effect extends to source memory for a neutral…
View details →Negative / Null Result ReportOpen accessPsychology
Andreea Geambașu, Sybren Spit, Daan van Renswoude et al. · 2022 · Developmental Science
We conducted a close replication of the seminal work by Marcus and colleagues from 1999, which showed that after a brief auditory exposure phase, 7-month-old infants were able to learn and generalize a rule to novel syllables not previously present in the exposure phase. This work became the foundation for the theoretical framework by which we assume that infants are able to learn abstract representations and generalize linguistic rules. While some extensions on the original work have shown evidence of rule learning, the outcomes are mixed, and an exact replication of Marcus et al.'s study has
View details →Negative / Null Result ReportOpen accessSocial Sciences
Lewend Mayiwar, Linda Lai · 2019 · Social Psychology
Abstract. We performed an independent, direct, and better powered ( N = 295) replication of Study 1, an experiment ( N = 113) by Lammers, Stoker, and Stapel (2009) . Lammers and colleagues distinguished between social power (influence over…
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A. Archidona-Yuste, I. Clavero-Camacho, A. N. Ruiz-Cuenca et al. · 2024 · Zoological Letters
Abstract The ring nematode genus Xenocriconemella De Grisse and Loof, 1965 comprises only one nominal species, Xenocriconemella macrodora (Taylor, 1936) De Grisse and Loof, 1965. The initial objective of the present study was to…
View details →Negative / Null Result ReportOpen accessMedicine
Sara R. Rashkin, Mario A. Cleves, Gary M. Shaw et al. · 2022 · American Journal of Medical Genetics Part A
Abstract Obstructive heart defects (OHDs) share common structural lesions in arteries and cardiac valves, accounting for ~25% of all congenital heart defects. OHDs are highly heritable, resulting from interplay among maternal exposures,…
View details →Negative / Null Result ReportComputer Science
Simon Holmbacka, Robert Müller · 2017
Current benchmark suites for evaluating energy efficiency of modern computer systems fail to replicate real-world streaming applications accurately enough because of indeterministic load pattern which depends heavily on the input data of…
View details →Negative / Null Result ReportPsychology
Emanuela S. Gritti, Gregory J. Meyer, Robert F. Bornstein et al. · 2020 · Journal of Personality Assessment
We used self-reported narcissistic grandiosity and vulnerability and a component derived from 11 potential grandiosity and narcissism variables (GNVs) coded from Rorschach behavior to predict fluctuations in self-esteem and their links to…
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Breanne Cuddington, Meghan L. Verschoor, Ali A. Ashkar et al. · 2015 · Molecular Therapy — Oncolytics
Oncolytic viruses selectively replicate in cancer cells by exploiting biochemical differences between normal and tumor cells. Treatment with epigenetic modifiers such as 5-Azacytidine, a DNA methyltransferase inhibitor, increases the…
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Sue M Hudson, Kathie Binysh, Stephen W Duffy · 2022 · Journal of Medical Screening
Objective The Covid-19 pandemic created a backlog of women awaiting an invitation for breast screening in the UK. To recover in a timely fashion, the National Health Service programme opted to issue open invitations (OI) to women rather…
View details →Negative / Null Result ReportEnvironmental Science
Justin J. Robert, Sarah M. Larocque, Steven J. Cooke · 2012 · North American Journal of Fisheries Management
Abstract Catch and release is a common practice among recreational anglers. In instances when fish are deeply hooked, the proper techniques for promoting survival are poorly understood, although evidence suggests that the fishing line…
View details →Negative / Null Result ReportOpen accessMedicine
Divya Narayanan, John David Rodriguez, Garrick Wallstrom et al. · 2020 · BMC Ophthalmology
BACKGROUND: To prevent irreversible vision loss in age-related macular degeneration (AMD), it is critical to detect retinal dysfunction before permanent structural loss occurs. In the current study we evaluated a series of visual function tests to identify potential endpoints to detect visual dysfunction in non-advanced AMD. METHODS: A series of visual function tests were performed on 23 non-advanced AMD subjects (AREDS grade 1-4 on simplified scale) and 34 age-matched normals (AREDS grade 0). Tests included some commonly used endpoints such as ETDRS visual acuity (VA), low luminance (LL) 2.0N
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Wei Tang, Yuwei Qiu, Huijie Lu et al. · 2021 · Frontiers in Surgery
Study Objective: This study aimed to investigate whether stroke volume variation (SVV)-guided goal-directed therapy (GDT) can improve postoperative outcomes in elderly patients undergoing minimally invasive esophagectomy (MIE) compared…
View details →Negative / Null Result ReportOpen accessMedicine
Ecaterina E. Dumbrava, Thomas E. Stinchcombe, Mrinal M. Gounder et al. · 2025 · Clinical Cancer Research
PURPOSE: Mouse double minute 2 (MDM2) is an E3 ubiquitin ligase that degrades the tumor suppressor p53. In cancers, MDM2 amplification (MDM2amp) leads to overexpression of MDM2, inducing p53 degradation and a p53-null phenotype even in the…
View details →Negative / Null Result ReportOpen accessMedicine
Louis Pechmajou, Éloi Marijon, Olivier Varenne et al. · 2020 · Circulation Cardiovascular Interventions
Background: Conflicting data exist regarding the benefit of urgent coronary angiogram and percutaneous coronary intervention (PCI) after sudden cardiac arrest, particularly in the absence of ST-segment elevation. We hypothesized that the…
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Jung Hyun Yoon, Jin Young Kwak, Hee Jung Moon et al. · 2019 · Ultrasound Quarterly
Abstract In this study, we evaluated the role of ultrasonography-guided core needle biopsy (US-CNB) in deciding upon management for prior atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS)…
View details →Negative / Null Result ReportOpen accessMedicine
Jianbo Wang, Hussein A. Tawbi · 2021 · Neuro-Oncology Advances
Brain metastases from solid tumors are increasing in incidence, especially as outcomes of systemic therapies continue to extend patients' overall survival. The long-held notion that the brain is an immune sanctuary has now been largely…
View details →Negative / Null Result ReportOpen accessAgricultural and Biological Sciences
James M. Barron, Nathan R. Jensen, Paul J. Anders et al. · 2013 · North American Journal of Aquaculture
Abstract The survival and percentage of North American Burbot Lota lota maculosa larvae and metamorphosing larvae presumed to have been cannibalized during a 15-d period immediately following a size-grading event were compared with those of fish in nongraded control groups. In larvae (mean TL, 11.8 mm), grading immediately produced a size distinction, as the group that passed the grader was significantly narrower and shorter than the group retained by the grader. The mean coefficient of variation of the length of larvae in the retained group was significantly lower than that of the control gro
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Dana Lengel, Paul J. Kenny · 2023 · Addiction Neuroscience
Diseases associated with nicotine dependence in the form of habitual tobacco use are a major cause of premature death in the United States. The majority of tobacco smokers will relapse within the first month of attempted abstinence.…
View details →Negative / Null Result ReportOpen accessMedicine
Zeev Elkoshi · 2021 · Frontiers in Immunology
A binary model for the classification of chronic diseases has formerly been proposed. The model classifies chronic diseases as “high Treg” or “low Treg” diseases according to the extent of regulatory T cells (Treg) activity (frequency or function) observed. The present paper applies this model to severe acute respiratory syndrome coronavirus 2 (SARS - CoV - 2) infection. The model correctly predicts the efficacy or inefficacy of several immune-modulating drugs in the treatment of severe coronavirus disease 2019 (COVID-19) disease. It also correctly predicts the class of pathogens mostly associ
View details →Negative / Null Result ReportOpen accessMedicine
Adam Brufsky, Michael T. Lotze · 2020 · Journal of Medical Virology
Muller's ratchet1 predicts that when mutation rates are high and a significant proportion of mutations are deleterious, a kind of irreversible ratchet mechanism will gradually decrease the mean fitness of small populations of asexual organisms.2 In cell culture, serial passage of genetically bottlenecked vesicular stomatitis virus, which grew quite rapidly on HeLa cells, severely reduced in fitness and virulence within 20 passages in a novel BHK host cell.2 Genetic bottlenecks are likely important in intraspecies viral transmission.3 RNA-based viruses are particularly prone to repeated bottlen
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Devika Sindu, Deepika Razia, Katherine Grief et al. · 2023 · Transplantation Direct
Background. Lung transplant recipients (LTRs) have an increased risk of COVID-19–related morbidity and mortality. Tixagevimab-cilgavimab (tix-cil) is a long-acting monoclonal antibody combination granted Emergency Use Authorization…
View details →Negative / Null Result ReportOpen accessMedicine
Xiaolin Yu, Jie Zhu, Xiang‐meng Liu et al. · 2020 · British Journal of Pharmacology
BACKGROUND AND PURPOSE: Immunotherapeutic intervention is one of the most promising strategies for the prevention and treatment of Alzheimer's disease (AD). Although they showed great success in AD mouse models, the clinical trials of many…
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