Negative / Null Result Report
Bethany Forseth, Jordan Carlson, Brittany Lancaster et al. · 2025 · Translational Behavioral Medicine
Abstract Background Childhood overweight/obesity in rural areas is a public health concern. Schools provide access to youth/families for health behavior programming but have adoption challenges. Purpose To explore school adoption of a…
View details →DOI: 10.1093/tbm/ibaf036 Negative / Null Result Report
Khamis M. Bilbeisi, C.R. Narayanaswamy · 2022 · Pressacademia
Purpose- After several attempts that extended over two years, in 2017 the U.S. Federal Trade Commission approved Walgreens’ proposal to buy nearly half of Rite Aid stores. The two companies were in the same line of business making the…
View details →DOI: 10.17261/pressacademia.2022.1646 Negative / Null Result Report
C. Fernando Gaspar · 2021 · Scientific Research Journal of Review of Public Administration and Management
This research looks at the birth and evolution of Entrepreneurial Ecosystems (EEs) in Portugal, comparing all the internal administrative regions. One the analysis led to a major distinction being drawn between dreamers (companies created…
View details →DOI: 10.47310/srjrpam.2021.v01i01.008 Negative / Null Result ReportOpen accessPhysics
Lydie Staron · 2012 · arXiv
This contribution reports on numerical simulations of 2D granular flows on erodible beds. The broad aim is to investigate whether simple flows of model granular matter exhibits spontaneous oscillatory motion in generic flow conditions, and in this case, whether the frictional properties of the contacts between grains may affect the existence or the characteristics of this oscillatory motion. The analysis of different series of simulations show that the flow develops an oscillatory motion with a well-defined frequency which increases like the inverse of the velocity's square root. We show that
Negative / Null Result ReportOpen accessComputer Science
Mitsuru Kakizaki, Shigeki Matsumoto, Yoshio Sato et al. · 2005 · arXiv
We point out that Kaluza-Klein (KK) dark matter physics is drastically affected by second KK particles. In this work various interesting phenomena caused by the second KK modes are discussed. In particular, we reevaluate the annihilation cross section and thermal relic density of the KK dark matter quantitatively in universal extra dimensions, in which all the standard model particles propagate. In these models, the first KK mode of $B$ boson is a viable dark matter candidate by virtue of KK-parity. We demonstrate that the KK dark matter annihilation cross section can be enhanced, compared wit
Negative / Null Result ReportOpen accessComputer Science
Shaaban Khalil · 1999 · arXiv
The cosmological relic density of the lightest supersymmetric particle (LSP) of type I string derived model is calculated. This model can accommodate large values of CP violating phases, and the electron and neutron electric dipole moments satisfy the experimental constraint. We show that the constraint from the electric dipole moment on the ratio between the gaugino masses implies that the mass of the LSP, which is bino like, is close to the lightest chargino. The co-annihilation between them is very important to reduce the LSP relic density to an interesting region. We show that the SUSY pha
Negative / Null Result ReportOpen accessComputer Science
Klaudia Guzij, Michael Fröhlich, Florian Fincke et al. · 2022 · arXiv
The voluntary carbon market is an important building block in the fight against climate change. However, it is not trivial for consumers to verify whether carbon offset projects deliver what they promise. While technical solutions for measuring their impact are emerging, there is a lack of understanding of how to translate this data into interface designs that mediate the establishment of trust. With interaction between users and offset projects mainly happening online, it is critical to meet this design challenge. To this end, we designed and evaluated interfaces with varying trust cues for c
Negative / Null Result ReportOpen accessPhysics
Pei-Lun He, Zhao-Han Zhang, Karen Z. Hatsagortsyan et al. · 2024 · arXiv
The spin polarization of photoelectrons induced by an intense linearly polarized laser field is investigated using numerical solutions of the time-dependent Schrödinger equation in companion with our analytic treatment via the spin-resolved strong-field approximation and classical trajectory Monte Carlo simulations. We demonstrate that, even though the total polarization vanishes upon averaging over the photoelectron momentum, momentum-resolved spin polarization is significant, typically exhibiting a vortex structure relative to the laser polarization axis. The polarization arises from the tra
Negative / Null Result ReportOpen accessComputer Science
Peggy Pei-Ying Lu, Makoto Konishi, Shin Sano et al. · 2022 · arXiv
Recent advances in technology have allowed an automation system to recognize its errors and repair trust more actively than ever. While previous research has called for further studies of different human factors and design features, their effect on human-automation trust repair scenarios remains unknown, especially concerning emotions. This paper seeks to fill such gaps by investigating the impact of anthropomorphism, users' individual differences, and emotional responses on human-automation trust repair. Our experiment manipulated various types of trust violations and apology messages with di
Negative / Null Result ReportOpen accessComputer Science
Anaïs Halin, Marc Van Droogenbroeck, Christel Devue · 2025 · arXiv
In this simulator study, we adopt a human-centered approach to explore whether and how drivers' cognitive state and driving environment complexity influence reliance on driving automation features. Besides, we examine whether such reliance affects driving performance. Participants operated a vehicle equipped with adaptive cruise control (ACC) in a simulator across six predefined driving scenarios varying in traffic conditions while either performing a cognitively demanding task (i.e., responding to mental calculations) or not. Throughout the experiment, participants had to respect speed limits
Negative / Null Result ReportOpen accessComputer Science
Andreas Vogelsang, Alexander Korn, Giovanna Broccia et al. · 2025 · arXiv
Large language models (LLMs) are increasingly used to generate software artifacts, such as source code, tests, and trace links. Requirements play a central role in shaping the input prompts that guide LLMs, as they are often used as part of the prompts to synthesize the artifacts. However, the impact of requirements formulation on LLM performance remains unclear. In this paper, we investigate the role of requirements smells-indicators of potential issues like ambiguity and inconsistency-when used in prompts for LLMs. We conducted experiments using two LLMs focusing on automated trace link gene
Negative / Null Result ReportOpen accessPhysics
Z. Q. Sun, F. Y. Wang · 2018 · arXiv
Recent studies have indicated that an anisotropic cosmic expansion may exist. In this paper, we use three datasets of type Ia supernovae (SNe Ia) to probe the isotropy of cosmic acceleration. For the Union2.1 dataset, the direction and magnitude of the dipole are $(l=309.3^{\circ} {}^{+ 15.5^{\circ}}_{-15.7^{\circ}} ,\ b = -8.9^{\circ} {}^{ + 11.2^{\circ}}_{-9.8^{\circ}} ),\ A=(1.46 \pm 0.56) \times 10^{-3}$. For the Constitution dataset, the results are $(l=67.0^{\circ}{}^{+ 66.5^{\circ}}_{-66.2^{\circ}},\ b=-0.6^{\circ}{}^{+ 25.2^{\circ}}_{-26.3^{\circ}}),\ A=(4.4 \pm 5.0) \times 10^{-4}$. F
Negative / Null Result ReportOpen accessPhysics
José F. Fontanari, Paulo R. A. Campos · 2025 · arXiv
Synchronized short-term activity cycles are a prominent feature in the nests of certain ant species, but their functional significance remains controversial. This study investigates whether synchronization enhances spatial accessibility within ant nests, a factor critical for efficient task performance and colony fitness. We use the mobile oscillator model, a computational framework that simulates ant movement and synchronous activity, to examine the effect of synchronization on the spatial distribution of inactive ants, which act as obstacles to the movement of active ants. Our analysis revea
Negative / Null Result ReportOpen accessComputer Science
Salman Khawar, Yingdan Lu, Yilang Peng et al. · 2026 · arXiv
The rapid proliferation of visual content raises fundamental questions about how different visual formats and features shape perceived credibility. Drawing on processing fluency theory, this research examines how visuals shape credibility judgments. We focus on three popular formats-photos, infographics, and data visualizations-comparing them to text-only posts, and test how two visual features, aesthetic appeal and production quality, influence credibility through processing fluency as a mediating mechanism. Through a preregistered experiment with 1200 US participants, we found that visual po
Negative / Null Result ReportOpen accessPhysics
A. Boughena, S. Benalia, O. Cheref et al. · 2021 · arXiv
Topological nontrivial nature are the latest phases to be discovered in condensed matter physics with insulating bulk band gaps and topologically protected metallic surface states; they are one of the current hot topics because of their unique properties and potential applications. In this paper, we have highlighted a first-principles study of the structural stability and electronic behavior of the Na${}_{2}$AgX (X= As, Sb and Bi) full Heusler compounds, using the Full-Potential Linear Muffin-Tin Orbital (FP-LMTO) method. We have originated that the Hg${}_{2}$CuTi structure is appropriate in a
Negative / Null Result ReportOpen accessComputer Science
Ihsan Kahveci, Timothy A. Thomas, Nathalie E. Williams et al. · 2026 · arXiv
Home eviction poses a significant threat to housing stability, a critical determinant of health. This study examines the relationship between eviction and health and substance use within the unhoused population of King County, Washington. Using a sample of 1,106 individuals experiencing homelessness, we employed a quasi-experimental design to compare the health outcomes of those who have experienced eviction with those who have not. Our findings reveal eviction is associated with an 8.3% point increase (SE = 0.039) in the likelihood of reporting poor general health and an 9.5% increase (SE = 0
Negative / Null Result ReportOpen accessComputer Science
Maximilian Warsinke, Maurizio Vergari, Tanja Kojić et al. · 2025 · arXiv
This study explores how prior exposure to physical objects influences the quality and realism perception of Digital Twins (DT) with varying levels of fidelity in Virtual Reality (VR). In a mixed experimental design, 24 participants were divided into two equal groups: an exposure group, in which members were shown physical objects before inspecting and rating their replicas in VR, and a control group without prior knowledge. Three objects were presented, each under four fidelity conditions with varying texture resolution and geometric detail. Participants rated perceived quality and realism thr
Negative / Null Result ReportOpen accessComputer Science
Rahul Arora, Jiannan Li, Gongyi Shi et al. · 2021 · arXiv
Size and distance perception in Virtual Reality (VR) have been widely studied, albeit in a controlled laboratory setting with a small number of participants. We describe a fully remote perceptual study with a gamified protocol to encourage participant engagement, which allowed us to quickly collect high-quality data from a large, diverse participant pool (N=60). Our study aims to understand medium-field size and egocentric distance perception in real-world usage of consumer VR devices. We utilized two perceptual matching tasks -- distance bisection and size matching -- at the same target dista
Negative / Null Result ReportOpen accessComputer Science
Samuel Westby, Richard J. Radke, Christoph Riedl et al. · 2023 · arXiv
Voice assistants are increasingly prevalent, from personal devices to team environments. This study explores how voice type and contribution quality influence human-agent team performance and perceptions of anthropomorphism, animacy, intelligence, and trustworthiness. By manipulating both, we reveal mechanisms of perception and clarify ambiguity in previous work. Our results show that the human resemblance of a voice assistant's voice negatively interacts with the helpfulness of an agent's contribution to flip its effect on perceived anthropomorphism and perceived animacy. This means human tea
Negative / Null Result ReportMedicine
Gou, He, Zhuo · 2026 · Frontiers in medicine
To investigate the effect and safety of astragalus injection at Neiguan (PC6) for chronic heart failure (CHF; HF) with qi-deficiency and blood-stasis syndrome, and its effect on the renin-angiotensin-aldosterone system (RAAS). A…
View details →DOI: 10.3389/fmed.2026.1836620 Negative / Null Result ReportOpen accessMathematics
Jens Rauch, Jens Hüsers, Birgit Babitsch et al. · 2018 · arXiv
Frequent users of emergency departments (ED) pose a significant challenge to hospital emergency services. Despite a wealth of studies in this field, it is hardly understood, what medical conditions lead to frequent attendance. We examine (1) what ambulatory care sensitive conditions (ACSC) are linked to frequent use, (2) how frequent users can be clustered into subgroups with respect to their diagnoses, acuity and admittance, and (3) whether frequent use is related to higher acuity or admission rate. We identified several ACSC that highly increase the risk for heavy ED use, extracted four majo
Negative / Null Result ReportOpen accessComputer Science
F. W. Bopp, Yu. M. Shabelski · 2006 · arXiv
The process of baryon number transfer due to string junction propagation in rapidity space is considered. It leads to a significant effect in the net baryon production in pA collisions at mid-rapidities and an even more significant effect in the forward hemisphere for the cases of πA interactions. The results of numerical calculations in the framework of the Quark-Gluon String Model are in reasonable agreement with the data. Special consideration is given to Λproduced in {π^-}-A collisions extracted from data of WA89 Collaboration.
Negative / Null Result ReportOpen accessPhysics
Narayan Khadka, Michal Zajaček, Swayamtrupta Panda et al. · 2022 · arXiv
We use observations of 66 reverberation-measured \Mgii\ quasars (QSOs) in the redshift range $0.36 \leq z \leq 1.686$ -- a subset of the 78 QSOs we previously studied that also have \rfe\ (flux ratio parameter of UV \Feii\ to \Mgii\ that is used as an accretion-rate proxy) measurements -- to simultaneously constrain cosmological model parameters and QSO 2-parameter and 3-parameter radius-luminosity ($R-L$) relation parameters in six different cosmological models. We find that these QSO $R-L$ relation parameters are independent of the assumed cosmological model and so these QSOs are standardiza
Negative / Null Result ReportOpen accessPhysics
Rabiah A. Rahmat, Melissa A. Humphries, Jeremy J. Austin et al. · 2020 · arXiv
Heat alters colour and crystallinity of teeth by destruction of the organic content and inducing hydroxyapatite crystal growth. The colour and crystallite changes can be quantified using spectrophotometric and x-ray diffraction analyses, however these analyses are not commonly used in combination to evaluate burned dental remains. In this study, thirty-nine teeth were incinerated at 300-1000$^\circ$C for 15 and 30 minutes and then measured using a spectrophotometer and an x-ray diffractometer. Response variables used were lightness, L$^\ast$, and chromaticity a$^\ast$ and b$^\ast$ and luminanc
Negative / Null Result ReportOpen accessPhysics
E. Forgacs-Dajka · 2006 · arXiv
We present detailed numerical calculations of the fast solar tachocline based on the assumption that the dynamo field dominates over the dynamics of the tachocline. In the present paper of the series, we focus on three shortfalls of the earlier models. First, instead of the simple oscillating dipole poloidal field we study the more general magnetic field structures reminiscent of the butterfly diagram. The migrating field is prescribed as the observed axisymmetric radial magnetic field Stenflo (1988, 1994). Our results are in good agreement with our analitical estimate and our previous works i
Negative / Null Result ReportOpen accessPhysics
M. Joyce, M. Montuori, F. Sylos Labini · 1999 · arXiv
We report our analysis of the properties of galaxy clustering for a new redshift sample of galaxies, the CfA2-South catalog, using statistical methods which do not rely on the assumption of homogeneity. We find that, up to ~ 20 Mpc/h, which is the largest scale to which correlation properties can be reliably inferred, the galaxy clustering is scale-invariant and characterized by a fractal dimension D=1.9 \pm 0.1. Further there is no statistical evidence for homogeneity at any of the larger scales (up to ~150 Mpc/h) probed more weakly by the catalog. These results means that characteristic ``co
Negative / Null Result ReportOpen accessPhysics
Vadim V. Bobylev, Maxim Yu. Khovritchev · 2006 · arXiv
Based on the Ogorodnikov-Milne model, we analyze the proper motions of Tycho-2 and UCAC2 stars. We have established that the model component that describes the rotation of all stars under consideration around the Galactic y axis differs significantly from zero at various magnitudes. We interpret this rotation found using the most distant stars as a residual rotation of the ICRS/Tycho-2 system relative to the inertial reference frame. For the most distant ($d\approx900$ pc) Tycho-2 and UCAC2 stars, the mean rotation around the Galactic y axis has been found to be $M_{13}=-0.37\pm0.04$ mas yr$^{
Negative / Null Result ReportOpen accessComputer Science
Meryem Yilmaz Soylu, Jeonghyun Lee, Jui-Tse Hung et al. · 2025 · arXiv
As Artificial Intelligence (AI) tools become increasingly embedded in higher education, understanding how students interact with these systems is essential to supporting effective learning. This study examines how students' AI literacy and prior exposure to AI technologies shape their perceptions of Socratic Mind, an interactive AI-powered formative assessment tool. Drawing on Self-Determination Theory and user experience research, we analyze relationships among AI literacy, perceived usability, satisfaction, engagement, and perceived learning effectiveness. Data from 309 undergraduates in Com
Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance
Akhmad Muhammadin, Rashila Ramli, Syamsul Ridjal et al. · 2020 · arXiv
The dynamic capability and marketing strategy are challenges to the banking sector in Indonesia. This study uses a survey method solving 39 banks in Makassar. Data collection was conducted of questionnaires. The results show that, the dynamic capability has a positive yet insignificant impact on the organizational performance, the marketing strategy has a positive and significant effect on organizational performance and, dynamic capability and marketing strategy have a positive and significant effect on the organization's performance in the banking sector in Makassar. Keywords : dynamic capabi
Negative / Null Result ReportOpen accessPhysics
L. K. Alexander, N. Buettgen, R. Nath et al. · 2006 · arXiv
We report 7Li NMR, magnetic susceptibility, and heat capacity measurements on the triangular lattice Heisenberg antiferromagnet compound LiCrO2. We find that in contrast to NaCrO2, magnetic properties of LiCrO2 have a more pronounced three dimensional character with sharp anomalies in the temperature variation of the 7Li NMR intensity and the NMR spin-lattice relaxation rate 1/T1. From heat capacity measurements we find that the total entropy related to the magnetic transition is in agreement with expectations. However, we find a significant contribution to the magnetic entropy in the range fr
