Negative / Null Result ReportOpen accessComputer Science
M. Burghoff, A. Schnabel, G. Ban et al. · 2011 · arXiv
A permanent electric dipole moment of fundamental spin-1/2 particles violates both parity (P) and time re- versal (T) symmetry, and hence, also charge-parity (CP) symmetry since there is no sign of CPT-violation. The search for a neutron electric dipole moment (nEDM) probes CP violation within and beyond the Stan- dard Model. The experiment, set up at the Paul Scherrer Institute (PSI), an improved, upgraded version of the apparatus which provided the current best experimental limit, dn < 2.9E-26 ecm (90% C.L.), by the RAL/Sussex/ILL collaboration: Baker et al., Phys. Rev. Lett. 97, 131801 (200
Negative / Null Result Report
Joonpyo Oh, Dae Kyum Yoo, Si Woo Jeong et al. · 2025 · Animal Bioscience
Objective: The effects of heat-treated soybean meal (SBM) and citric acid (HCSBM) on the growth performance, rumen fermentation, blood metabolites, nutrient digestibility, and nitrogen (N) utilization were evaluated in growing Hanwoo…
View details →DOI: 10.5713/ab.24.0860 Negative / Null Result Report
Kaixun Hu, Yajing Huang, Huisheng Ai et al. · 2015 · Blood
Abstract Acute myeloid leukemia (AML) of older patients is an aggressive malignancy. Despite decitabine is performed some clinic trials in these patients, however there is little data on efficacy and is more controversial on it. Recent…
View details →DOI: 10.1182/blood.v126.23.1318.1318 Negative / Null Result Report
Yousuke Nakai, Hiroyuki Isayama, Kazunaga Ishigaki et al. · 2016 · Journal of Clinical Oncology
293 Background: We previously reported the introduction of S-1 improved overall survival (OS) in advanced pancreatic cancer (PC), but in a pooled analysis of 3 RCTs, a combination of gemcitabine and S-1 (GS) improved OS in locally advanced…
View details →DOI: 10.1200/jco.2016.34.4_suppl.293 Negative / Null Result Report
John G. Skedros, Tanner R. Henrie, Chad S. Mears · 2014 · Case Reports in Orthopedics
Although interposition soft-tissue (biologic) resurfacing of the glenoid with humeral hemiarthroplasty has been considered an option for end-stage glenohumeral arthritis, the results of this procedure are highly unsatisfactory in patients…
View details →DOI: 10.1155/2014/517801 Negative / Null Result Report
Zeeshan M. Akhtar, Emily R. Hunt, Brooks N. Platt et al. · 2021 · The Journal of Hip Surgery
Abstract Doxycycline has been shown to reduce fibroblast activity in the treatment of multiple pathologies, and was utilized as part of the postoperative medication protocol to help prevent adhesions from developing after hip arthroscopy.…
View details →DOI: 10.1055/s-0041-1739456 Negative / Null Result Report
Abdullahi Abubakar, Boniface Denis Umoh · 2023 · Caleb International Journal of Development Studies
Many employees are merely holding on to their current jobs for lack of alternatives. Such staff members are no longer deriving satisfaction from their current jobs. Lack of satisfaction impinges on workers productivity and attitude to work…
View details →DOI: 10.26772/cijds-2023-06-01-06 Negative / Null Result Report
B Gu, J Chetwood, A Pudipeddi et al. · 2026 · Journal of Crohn’s and Colitis
Abstract Background Emerging evidence suggests early initiation of advanced therapies (AT) may improve outcomes, but optimal timing remains unclear. We aimed to assess the impact of AT timing on persistence. Methods We interrogated the…
View details →DOI: 10.1093/ecco-jcc/jjaf231.784 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 Negative / Null Result Report
Taíse Toniazzo, Rafael de Almeida Azevedo, Tamires Nunes Oliveira et al. · 2025 · International Journal of Sport Nutrition and Exercise Metabolism
Sports supplements composed of carbohydrate and protein are widely used by endurance athletes and recreational practitioners, mostly aimed at improving performance. This study investigated the effect of a novel carbohydrate + protein honey…
View details →DOI: 10.1123/ijsnem.2025-0021 Negative / Null Result Report
Ching-Tai Huang, Avijit Dutta, Tse-Ching Chen et al. · 2016 · The Journal of Immunology
Abstract The host immune system responds to influenza virus infection for eradication of the virus but the immune response associated inflammation causes tissue injury and damage to the host as well. Severe influenza with morbidity and…
View details →DOI: 10.4049/jimmunol.196.supp.76.21 Negative / Null Result Report
Vitalii Yasenenko · 2025 · Technologies and Engineering
Growing cyber threats in the context of digital transformation require improved methods of automating cyber defence, in particular, through the use of artificial intelligence to detect and respond to attacks. The purpose of the study was…
View details →DOI: 10.30857/2786-5371.2025.3.7 Negative / Null Result Report
Ray Stefani · 2012 · Significance
Abstract The 1988 Olympics were followed by anti-doping measures. Performances then diminished. Ray Stefani examines the rate of improvement in various events to see whether clean athletes can overcome the barriers set by suspect records…
View details →DOI: 10.1111/j.1740-9713.2012.00551.x Negative / Null Result Report
Francis Lali, Kay Raftery, Hannah Levy et al. · 2026 · Spine
Study Design. Finite element (FE) analysis of retrospective clinical cohort. Objective. To determine whether preoperative CT-derived FE model outputs can improve subsidence prediction compared to conventional clinical measurements alone in…
View details →DOI: 10.1097/brs.0000000000005698 Negative / Null Result Report
Bahadır Kartal, Mehmet Berksun Tutan, Fatih Şahin et al. · 2024 · Hitit Medical Journal
Objective: Gastric cancer surgery, including curative and palliative procedures, is crucial for managing gastric cancer. Accurate assessment of nutritional status is essential for risk stratification and improving patient outcomes. This…
View details →DOI: 10.52827/hititmedj.1516777 Abandoned Hypothesis
Julia Casañas Cast · 2020 · Royal Conservatoire Research Portal
Many classical musicians can suffer from tension and nervousness during solo performance. This research looks at how practicing improvisation and creative body movement, as well as creating one’s own performance together with a dancer, can…
View details →DOI: 10.22501/koncon.792184 Negative / Null Result Report
Ainun Oktavia Sari, Rahayu Sulistyowati, Ita Prihantika · 2020 · Administrativa: Jurnal Birokrasi, Kebijakan dan Pelayanan Publik
The Conditional Cash Transfer (CCT) is a conditional social cash transfer program that provides assistance to Very Poor Households (RTSM) appointed as participants in the Conditional Cash Transfer program which is related to improving the…
View details →DOI: 10.23960/administrativa.v2i3.51 Negative / Null Result Report
Mary Cushman, Suzanne E Judd, Virginia J Howard et al. · 2011 · Circulation
Background. The AHA 2020 Goal includes improving cardiovascular health, defined using a metric consisting of 7 health factors, Life's Simple 7. A central concept of the goal is that small improvements in behavior / lifestyle factors at the…
View details →DOI: 10.1161/circ.124.suppl_21.a17917 Negative / Null Result Report
Muhammad Dawood Mian, Saadullah Jan Khan, Rehana Rani et al. · 2026 · Access Microbiology
Rapid and reliable identification of bacteria is essential in clinical and environmental microbiology. Gram staining remains a widely used method for preliminary classification; however, it may require additional steps and can be difficult…
View details →DOI: 10.1099/acmi.0.000965.v3 Negative / Null Result Report
M Erickson, N Tomassoni, R Sun et al. · 2026 · Europace
Abstract Background/Introduction Bachmann bundle pacing (BBP) has emerged as a favorable alternative to traditional right atrial appendage (RAA) pacing, offering benefits such as reduced atrial fibrillation and improved diastolic function.…
View details →DOI: 10.1093/europace/euag105.733 Negative / Null Result Report
Rebecca L Rivera, Melissa K Maulding, Angela R Abbott et al. · 2016 · The FASEB Journal
Objective To determine the relationship of rural and urban county household status to long‐term food security among households with children in Indiana after a Supplemental Nutrition Assistance Program‐Education (SNAP‐Ed) intervention.…
View details →DOI: 10.1096/fasebj.30.1_supplement.674.26 Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance
Mohammad Hassan Shakil, Arne Johan Pollestad, Khine Kyaw et al. · 2025 · arXiv
With European Union initiatives mandating gender quotas on corporate boards, a key question arises: Is greater board gender diversity (BGD) associated with better emissions performance (EP)? To answer this question, we examine the influence of BGD on EP across a sample of European firms from 2016 to 2022. Using panel regressions, advanced machine learning algorithms, and explainable AI, we reveal a non-linear relationship. Specifically, EP improves with BGD up to an optimal level of approximately 35 %, beyond which further increases in BGD yield no additional improvement in EP. A minimum BGD t
Negative / Null Result ReportOpen accessComputer Science
Lennart Meincke, Ethan Mollick, Lilach Mollick et al. · 2025 · arXiv
This is the third in a series of short reports that seek to help business, education, and policy leaders understand the technical details of working with AI through rigorous testing. In this report, we investigate two commonly held prompting beliefs: a) offering to tip the AI model and b) threatening the AI model. Tipping was a commonly shared tactic for improving AI performance and threats have been endorsed by Google Founder Sergey Brin (All-In, May 2025, 8:20) who observed that 'models tend to do better if you threaten them,' a claim we subject to empirical testing here. We evaluate model p
Negative / Null Result ReportMedicine
Okada, Tominaga, Iwakura et al. · 2026 · Resuscitation
Out-of-hospital cardiac arrest (OHCA) is a public health concern. Whether conventional cardiopulmonary resuscitation (CPR) with rescue breathing may improve outcomes compared with compression-only or no CPR in suffocation-related OHCA is…
View details →DOI: 10.1016/j.resuscitation.2026.111189 Negative / Null Result ReportOpen accessComputer Science
Rylan Malarchick · 2026 · arXiv
We present an analysis of quantum circuit fidelity across the full compilation stack, from high-level gate optimization through pulse-level control. We connect a C++ circuit optimizer to a per-gate Lindblad master-equation fidelity model whose decoherence channels are cross-validated against qiskit-dynamics and whose absolute predictions are benchmarked against execution on real hardware. Across a campaign of 4,452 experiment runs over 371 benchmark circuits, gate cancellation provides the dominant improvement ($d = 1.66$, 72% of circuits improved), while circuit size and pulse duration are th
Negative / Null Result ReportOpen accessComputer Science
Song Tae-Eun · 2026 · arXiv
Cross-Context Review (CCR) improves LLM verification by separating production and review into independent sessions. A natural extension is multi-turn review: letting the reviewer ask follow-up questions, receive author responses, and review again. We call this Dynamic Cross-Context Review (D-CCR). In a controlled experiment with 30 artifacts and 150 injected errors, we tested four D-CCR variants against the single-pass CCR baseline. Single-pass CCR (F1 = 0.376) significantly outperformed all multi-turn variants, including D-CCR-2b with question-and-answer exchange (F1 = 0.303, $p < 0.001$, $d
Negative / Null Result ReportOpen accessComputer Science
Marco Cognetta, Tatsuya Hiraoka, Naoaki Okazaki et al. · 2024 · arXiv
We explore threshold vocabulary trimming in Byte-Pair Encoding subword tokenization, a postprocessing step that replaces rare subwords with their component subwords. The technique is available in popular tokenization libraries but has not been subjected to rigorous scientific scrutiny. While the removal of rare subwords is suggested as best practice in machine translation implementations, both as a means to reduce model size and for improving model performance through robustness, our experiments indicate that, across a large space of hyperparameter settings, vocabulary trimming fails to improv
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
Negative / Null Result ReportOpen accessComputer Science
Janarthanan Rajendran, Jonathan K. Kummerfeld, Satinder Singh · 2021 · arXiv
For each goal-oriented dialog task of interest, large amounts of data need to be collected for end-to-end learning of a neural dialog system. Collecting that data is a costly and time-consuming process. Instead, we show that we can use only a small amount of data, supplemented with data from a related dialog task. Naively learning from related data fails to improve performance as the related data can be inconsistent with the target task. We describe a meta-learning based method that selectively learns from the related dialog task data. Our approach leads to significant accuracy improvements in
