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Browse the failure-mode index

21,691 real negative results, null findings, and replication failures. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Negative / Null Result ReportOpen accessEngineering

Prediction of Compressive Strength of Concrete Using Explainable Machine Learning Models

H. Fu, Xiong Zhou, Pengfei Xu et al. · 2025 · Materials

Predicting the compressive strength of concrete is essential for engineering design and quality assurance. Traditional empirical formulas often fall short in capturing complex multi-factor interactions and nonlinear relationships. This study employs an interpretable machine learning framework using Gradient Boosting Trees, Random Forest, and Backpropagation Neural Networks to predict concrete compressive strength. Bayesian optimization was employed for hyperparameter tuning, and SHAP analysis was used to quantify feature contributions. Based on 223 sets of compression test data, this study sys

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Negative / Null Result ReportOpen accessChemistry

Contribution of the Locus of Heat Resistance to Growth and Survival of Escherichia coli at Alkaline pH and at Alkaline pH in the Presence of Chlorine

Tongbo Zhu, Zhiying Wang, Lynn M. McMullen et al. · 2021 · Microorganisms

The locus of heat resistance (LHR) confers resistance to extreme heat, chlorine and oxidative stress in Escherichia coli. This study aimed to determine the function of the LHR in maintaining bacterial cell envelope homeostasis, the regulation of the genes comprising the LHR and the contribution of the LHR to alkaline pH response. The presence of the LHR did not affect the activity of the Cpx two-component regulatory system in E. coli, which was measured to quantify cell envelope stress. The LHR did not alter E. coli MG1655 growth rate in the range of pH 6.9 to 9.2. However, RT-qPCR results ind

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Mycotoxins and the Intestinal Epithelium: From Barrier Injury to Stem Cell Dysfunction

Wenying Huo, Yingying Qiao, Xiangru He et al. · 2025 · Toxins

Mycotoxins are toxic secondary metabolites produced by filamentous fungi that contaminate agricultural commodities, posing risks to food safety, animal productivity, and human health. The gastrointestinal tract is the first and most critical site of exposure, where the intestinal epithelium functions as both a physical and immunological barrier against luminal toxins and pathogens. While extensive research has demonstrated that mycotoxins disrupt epithelial integrity through tight junction impairment, oxidative stress, apoptosis, and inflammation, their effects on the intestinal stem cell (ISC

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Negative / Null Result ReportOpen accessMedicine

Tissue-resident macrophage survival depends on mitochondrial function regulated by SerpinB2 in chronic inflammation

Sathish Babu Vasamsetti, Samreen Sadaf, Mohammad A. Uddin et al. · 2026 · Nature Communications

How cellular metabolism facilitates tissue-resident macrophage maintenance remains elusive. Here we show that visceral adipose tissue (VAT)-resident macrophages, unlike monocyte-derived macrophages, are enriched with mitochondrial-specific antioxidant enzymes restraining inflammation and promoting VAT homeostasis and insulin sensitivity. Additionally, VAT resident macrophages express high levels of plasminogen activator inhibitor type 2, encoded by SerpinB2, which is involved in the blood coagulation cascade. SerpinB2 promotes adipose resident macrophage survival by regulating mitochondrial ox

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Negative / Null Result ReportOpen accessEngineering

SKDAN: A Signal Knowledge-enhanced Domain Adaptation Network for remaining useful life prediction and uncertainty quantification of rolling bearings

Bin Liu, Changfeng Yan, Ming Lv et al. · 2026 · Computers in Industry

Domain adaptation-based methods are extensively applied to predict the Remaining Useful Life (RUL) of rolling bearings under complex operating conditions. However, the nonlinear degradation process of bearings gives rise to markedly…

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Negative / Null Result ReportOpen accessPhysics and Astronomy

Evidence for Neutrino Emission from X-Ray-bright Active Galactic Nuclei with IceCube

R. Abbasi, M. Ackermann, J. Adams et al. · 2026 · The Astrophysical Journal Letters

Abstract Recently, IceCube reported neutrino emission from the Seyfert galaxy NGC 1068. Using 13.1 yr of IceCube data, we present a follow-up search for neutrino sources in the northern sky. NGC 1068 remains the most significant neutrino source among 110 preselected gamma-ray emitters while also being spatially compatible with the most significant location in the northern sky. Its energy spectrum is characterized by an unbroken power-law with spectral index γ = 3.4 ± 0.2. Consistent with previous results, the observed neutrino flux exceeds its gamma-ray counterpart by at least 2 orders of magn

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Negative / Null Result Report

Combining biological and psychosocial baseline variables did not improve prediction of outcome of a very‐low‐energy diet in a clinic referral population

P. Sumithran, K. Purcell, S. Kuyruk et al. · 2017 · Clinical Obesity

Summary Consistent, strong predictors of obesity treatment outcomes have not been identified. It has been suggested that broadening the range of predictor variables examined may be valuable. We explored methods to predict outcomes of a…

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Negative / Null Result Report

Can revenue index insurance outperform yield index insurance?

Richard A. Gallenstein, John P. Dougherty · 2024 · American Journal of Agricultural Economics

Abstract Index insurance programs in developing countries have focused almost entirely on agricultural production risk (i.e., yield) while largely avoiding output marketing risk (i.e., price). This omission may miss an important constraint…

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Negative / Null Result Report

Significant association of urinary alpha‐1‐microglobulin compared to urinary neutrophil gelatinase‐associated lipocalin with renal insufficiency in patients with type 2 diabetes

Guangming Chen, Xiaoyun Shan, Huabin Wang · 2021 · Nephrology

Abstract Aim Various studies have reported that urinary neutrophil gelatinase‐associated lipocalin (NGAL), an indicator of tubular damage, may be an effective biomarker of renal impairment in patients with diabetes. This study aimed to…

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Negative / Null Result Report

Strategy war games: how business can outperform the competition

Jason West, Maiko Chu, Lincoln Crooks et al. · 2018 · Journal of Business Strategy

Purpose Business wargames represent an alternative approach to challenge organisations to uncover internal capabilities through competitive actions designed to counteract external threats and address strategic mismatches. Internal…

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Negative / Null Result Report

The Acoustic Emission Method Implementation Proposition to Confirm the Presence and Assessment of Reinforcement Quality and Strength of Fiber–Cement Composites

Anna Adamczak-Bugno, Aleksandra Krampikowska · 2020 · Materials

This article proposes to use the acoustic emission (AE) method to evaluate the degree of change in the mechanical parameters of fiber–cement boards. The research was undertaken after a literature review, due to the lack of a methodology…

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Negative / Null Result Report

A Refined Model of Stress–Diathesis Relationships in Mothers With Significant Depressive Symptom Severity

Yui Matsuda, Todd A. Schwartz, YunKyung Chang et al. · 2019 · Journal of the American Psychiatric Nurses Association

BACKGROUND: Mothers’ depressive symptoms affect their children’s growth as well as physical and mental well-being. Moreover, mothers of young children with developmental delay or disability (DD) tend to have higher depressive symptoms.…

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Negative / Null Result Report

“What Did She Say? What Did She Say?” the Impact of Interpretation on Recruiting and Interviewing European Migrant Women in the United Kingdom

Mona Almalik, Alice Kiger, Janet Tucker · 2010 · International Journal of Qualitative Methods

Although a few researchers mention that involving interpreters can have an impact on the research process and research findings, little is published regarding methods of assessing the interpretation work's quality and impact. The impact of…

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Negative / Null Result Report

Where Do Women With Urinary Incontinence Find Information About Absorbent Products and How Useful Do They Find It?

Nicholas Smith, Kathleen F. Hunter, Saima Rajabali et al. · 2019 · Journal of Wound, Ostomy & Continence Nursing

PURPOSE: This study aimed to determine from what sources women with urinary and dual urinary and fecal incontinence sought and received information about incontinence and absorbent products. We also evaluated source utility. DESIGN:…

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Negative / Null Result ReportOpen accessMedicine

A Significant Effect of Pemafibrate on Hepatic Steatosis and Fibrosis Indexes in Patients With Hypertriglyceridemia

Hisayuki Katsuyama, Hidekatsu Yanai, Hiroki Adachi et al. · 2023 · Gastroenterology Research

Background: We previously reported that the selective peroxisome proliferator-activated receptor alpha modulator, pemafibrate, significantly reduced serum levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT) and…

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Negative / Null Result Report

Retrospective chart review: seasonal variation in incidence of bolus impaction is maintained and statistically significant in subgroups with atopy and eosinophilic esophagitis

Mattias Ekre, Jakob Tytor, Mogens Bove et al. · 2020 · Diseases of the Esophagus

Summary Eosinophilic esophagitis (EoE) is a chronic inflammatory condition with eosinophilic infiltration of the esophageal mucosa. The most prominent symptom is dysphagia, which may result in esophageal bolus impaction in need of surgical…

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Negative / Null Result ReportOpen accessEngineering

Statistical Analysis of Machinery Variance by Python

Joao Gabriel Ostrowski, József Menyhárt · 2020 · Acta Polytechnica Hungarica

Based particularly on data technologies, information is rapidly evolving in engineering. In mechanical engineering, maintenance is benefiting the most from data innovations, the reduction of maintenance costs, and the improvement of system…

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