19,735 real negative results, null findings, and replication failures · Negative / Null Result Report. 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.
Hwan Su Yoon, Dana C. Price, Ramūnas Stepanauskas et al. · 2011 · Science
Whole-genome shotgun sequence data from three individual cells isolated from seawater, followed by analysis of ribosomal DNA, indicated that the cells represented three divergent clades of picobiliphytes. In contrast with the recent…
View details →Marko Ljubotina, Marko Žnidarič, Tomaž Prosen · 2017 · Nature Communications
Generalized hydrodynamics predicts universal ballistic transport in integrable lattice systems when prepared in generic inhomogeneous initial states. However, the ballistic contribution to transport can vanish in systems with additional discrete symmetries. Here we perform large scale numerical simulations of spin dynamics in the anisotropic Heisenberg XXZ spin 1/2 chain starting from an inhomogeneous mixed initial state which is symmetric with respect to a combination of spin reversal and spatial reflection. In the isotropic and easy-axis regimes we find non-ballistic spin transport which we
View details →Jože P. Damijan, Črt Kostevc, Sašo Polanec · 2010 · World Economy
Abstract Firm productivity and export decisions are closely related to innovation activity. Innovation may play a more important role in the decision to start exporting, and successful exporting may drive process innovation. This suggests…
View details →José Carlos Bouso, Débora González, Sabela Fondevila et al. · 2012 · PLoS ONE
Ayahuasca is an Amazonian psychoactive plant beverage containing the serotonergic 5-HT(2A) agonist N,N-dimethyltryptamine (DMT) and monoamine oxidase-inhibiting alkaloids (harmine, harmaline and tetrahydroharmine) that render it orally active. Ayahuasca ingestion is a central feature in several Brazilian syncretic churches that have expanded their activities to urban Brazil, Europe and North America. Members of these groups typically ingest ayahuasca at least twice per month. Prior research has shown that acute ayahuasca increases blood flow in prefrontal and temporal brain regions and that it
View details →Tong He, Ru Kong, Avram J. Holmes et al. · 2019 · NeuroImage
There is significant interest in the development and application of deep neural networks (DNNs) to neuroimaging data. A growing literature suggests that DNNs outperform their classical counterparts in a variety of neuroimaging…
View details →S. Abrahamyan, Z. Ahmed, K. Allada et al. · 2011 · Physical Review Letters
We present a search at the Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling ${\ensuremath{\alpha}}^{\ensuremath{'}}$ to electrons. Such a particle ${A}^{\ensuremath{'}}$ can be produced in…
View details →Scott Freeman, David C. Haak, Mary Pat Wenderoth · 2011 · CBE—Life Sciences Education
We tested the hypothesis that highly structured course designs, which implement reading quizzes and/or extensive in-class active-learning activities and weekly practice exams, can lower failure rates in an introductory biology course for…
View details →Daniele Tori, Özlem Onaran · 2017 · Cambridge Journal of Economics
This paper estimates the effects of financialization on physical investment in the UK using panel data based on balance-sheets of publicly listed non-financial companies supplied by Worldscope for the period 1985-2013. We find robust…
View details →Luke Macyszyn, Hamed Akbari, Jared Pisapia et al. · 2015 · Neuro-Oncology
BACKGROUND: MRI characteristics of brain gliomas have been used to predict clinical outcome and molecular tumor characteristics. However, previously reported imaging biomarkers have not been sufficiently accurate or reproducible to enter…
View details →Peng Chen, Yeong Gug Kim · 2014 · Journal of Internet Commerce
This study uses the Stimuli-Organism-Response framework to examine how consumers’ reasons for shopping and website stimuli affect their attitudes toward online shopping, their ability to regulate their emotional purchases, and their…
View details →Lorena Gómez‐Aparicio, Raúl García‐Valdés, Paloma Ruiz‐Benito et al. · 2011 · Global Change Biology
Most large-scale multispecies studies of tree growth have been conducted in tropical and cool temperate forests, whereas Mediterranean water-limited ecosystems have received much less attention. This limits our understanding of how growth…
View details →Kenneth E. Kunkel, David R. Easterling, David A. R. Kristovich et al. · 2012 · Journal of Hydrometeorology
Abstract Daily extreme precipitation events, exceeding a threshold for a 1-in-5-yr occurrence, were identified from a network of 935 Cooperative Observer stations for the period of 1908–2009. Each event was assigned a meteorological cause,…
View details →Petra Valíčková, Tomáš Havránek, Roman Horváth · 2014 · Journal of Economic Surveys
Abstract We analyze 1334 estimates from 67 studies that examine the effect of financial development on economic growth. Taken together, the studies imply a positive and statistically significant effect, but the individual estimates vary…
View details →Alexander Klemm, Stefan Van Parys, Prepared Alex et al. · 2012
This Working Paper should not be reported as representing the views of the IMF. The views expressed in this Working Paper are those of the author(s) and do not necessarily represent those of the IMF or IMF policy. Working Papers describe…
View details →Naser Hoboubi, Alireza Choobineh, Fatemeh Kamari Ghanavati et al. · 2016 · Safety and Health at Work
BACKGROUND: Job stress and job satisfaction are important factors affecting workforce productivity. This study was carried out to investigate the job stress, job satisfaction, and workforce productivity levels, to examine the effects of…
View details →Bahareh Asadishad, Shawninder Chahal, Ali Akbari et al. · 2018 · Environmental Science & Technology
Several types of engineered nanoparticles (ENPs) are being considered for direct application to soils to reduce the application and degradation of pesticides, provide micronutrients, control pathogens, and increase crop yields. This study…
View details →Oliver Falck, Robert Gold, Stephan Heblich · 2014 · American Economic Review
This paper analyzes the effects on voting behavior of information disseminated over the Internet. We address endogeneity in Internet availability by exploiting regional and technological peculiarities of the preexisting voice telephony…
View details →Thomas Sullivan, Ian R. White, Amy Salter et al. · 2016 · Statistical Methods in Medical Research
The use of multiple imputation has increased markedly in recent years, and journal reviewers may expect to see multiple imputation used to handle missing data. However in randomized trials, where treatment group is always observed and…
View details →E Eijgelaar, Carla Thaper, Paul Peeters · 2010 · Journal of Sustainable Tourism
This paper examines a paradoxical issue in tourism's adaptation to climate change and emissions reduction demands. Operators increasingly take tourists to destinations threatened by climate change, with Antarctica and other polar regions…
View details →Ashish K. Jha, Karen E. Joynt, E. John Orav et al. · 2012 · New England Journal of Medicine
BACKGROUND: Pay for performance has become a central strategy in the drive to improve health care. We assessed the long-term effect of the Medicare Premier Hospital Quality Incentive Demonstration (HQID) on patient outcomes. METHODS: We…
View details →Eugenio Proto, Climent Quintana‐Domeque · 2021 · PLoS ONE
We use the UK Household Longitudinal Study and compare pre-COVID-19 pandemic (2017-2019) and during-COVID-19 pandemic data (April 2020) for the same group of individuals to assess and quantify changes in mental health as measured by changes in the GHQ-12 (General Health Questionnaire), among ethnic groups in the UK. We confirm the previously documented average deterioration in mental health for the whole sample of individuals interviewed before and during the COVID-19 pandemic. In addition, we find that the average increase in mental distress varies by ethnicity and gender. Both women -regardl
View details →Claudette E. Loo, Marieke E. Straver, Sjoerd Rodenhuis et al. · 2011 · Journal of Clinical Oncology
PURPOSE: To evaluate the relevance of breast cancer subtypes for magnetic resonance imaging (MRI) markers for monitoring of therapy response during neoadjuvant chemotherapy (NAC). PATIENTS AND METHODS: MRI examinations were performed in…
View details →Arash Vahdat, Ali Alizadeh, Sara Quach et al. · 2020 · Australasian Marketing Journal (AMJ)
This study investigates how technology acceptance model (TAM) factors and social factors determine customer purchase intention. Although previous studies on mobile apps have investigated TAM, critical social factors have been neglected,…
View details →Xiaobo Wang, Xiao‐Tao Lü, Jing Yao et al. · 2017 · The ISME Journal
The existence of biogeographic patterns among most free-living microbial taxa has been well established, yet little is known about the underlying mechanisms that shape these patterns. Here, we examined soil bacterial β-diversity across…
View details →Gregor Kennedy, Terry Judd, Barney Dalgarno et al. · 2010 · Journal of Computer Assisted Learning
Abstract Previously assumed to be a homogenous and highly skilled group with respect to information and communications technology, the so‐called Net Generation has instead been shown to possess a diverse range of technology skills and…
View details →Mounir El Asmar, Awad S. Hanna, Wei‐Yin Loh · 2013 · Journal of Construction Engineering and Management
Integrated project delivery (IPD) is an emerging construction project delivery system that collaboratively involves key participants very early in the project timeline, often before the design is started. It is distinguished by a…
View details →Noah Anderson, Julia R. Kelson, Sándor Kele et al. · 2021 · Geophysical Research Letters
Abstract The potential for carbonate clumped isotope thermometry to independently constrain both the formation temperature of carbonate minerals and fluid oxygen isotope composition allows insight into long‐standing questions in the Earth…
View details →Bjarne M. Nes, Imre Janszky, Ulrik Wisløff et al. · 2012 · Scandinavian Journal of Medicine and Science in Sports
Maximal heart rate (HRmax ) declines substantially with age, but the magnitude and possible modifying effect of gender, body composition, and physical activity are not fully established. The present study examined the relationship between…
View details →Xiaobo Lü, Pierre F. Landry · 2014 · American Political Science Review
We argue that interjurisdiction competition in authoritarian regimes engenders a specific logic for taxation. Promotion-seeking local officials are incentivized to signal loyalty and competence to their principals through tangible fiscal…
View details →Song‐Yi Park, Neal D. Freedman, Christopher A. Haiman et al. · 2017 · Annals of Internal Medicine
BACKGROUND: Coffee consumption has been associated with reduced risk for death in prospective cohort studies; however, data in nonwhites are sparse. OBJECTIVE: To examine the association of coffee consumption with risk for total and…
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