Results 51 to 60 of about 38,134 (228)

Calendar Anomalies, Market Regimes, and the Adaptive Market Hypothesis in African Stock Markets

open access: yesCentral European Management Journal, 2019
Purpose: This paper examines the changing behavior of two calendar anomalies in African stock returns – the month-of-the-year and the intra-month effects – and their implications for the adaptive market hypothesis (AMH).
Obalade Adefemi A.   +1 more
doaj   +1 more source

Climate change at the ecosystem scale: a 50-year record in New Hampshire [PDF]

open access: yes, 2012
Observing the full range of climate change impacts at the local scale is difficult. Predicted rates of change are often small relative to interannual variability, and few locations have sufficiently comprehensive long-term records of environmental ...
Bailey, Amey S.   +3 more
core   +2 more sources

Are cryptocurrencies safe havens during the COVID-19 pandemic? A threshold regression perspective with pandemic-related benchmarks

open access: yesEconomics and Business Review, 2022
The paper employs a threshold regression framework conditioned by two COVID-19 related proxies, to investigate whether Bitcoin and Ether exhibit short-term safe haven or diversifier features for stock and bond markets.
Barbu Teodora Cristina   +2 more
doaj   +1 more source

The impacts of day trading activity on market quality: evidence from the policy change on the Taiwan stock market [PDF]

open access: yesSeonmul yeongu, 2020
This paper aims to investigate the impact of day trading on market quality on the Taiwan stock market with the implementation of a unique policy change. This paper examines 396 listed stocks from June 2015 to October 2016, a period when the stock market ...
Tun-Ya Yang   +3 more
doaj   +1 more source

Injection but not ingestion of a mixed virus suspension in Queensland fruit fly (Bactrocera tryoni) shifts persistent covert infection to acute pathology. [PDF]

open access: yesPest Manag Sci
Covert and persistent infections with multiple insect‐specific viruses are common in pest fruit flies and may affect pest management strategies. Our study investigated the host effects and viral loads of cripavirus and iflavirus as persistent infections in Queensland fruit fly, and after injection and ingestion of a mixed virus suspension containing ...
Sharpe SR   +4 more
europepmc   +2 more sources

The minimal density of triangles in tripartite graphs

open access: yes, 2009
We determine the minimal density of triangles in a tripartite graph with prescribed edge densities. This extends a previous result of Bondy, Shen, Thomass\'e and Thomassen characterizing those edge densities guaranteeing the existence of a triangle in a ...
Bollobás, Erdős, Lovász, Mantel
core   +1 more source

Novikov algebras and a classification of multicomponent Camassa-Holm equations [PDF]

open access: yes, 2014
A class of multi-component integrable systems associated to Novikov algebras, which interpolate between KdV and Camassa-Holm type equations, is obtained. The construction is based on the classification of low-dimensional Novikov algebras by Bai and Meng.
Strachan, Ian A. B.   +1 more
core   +2 more sources

Beyond Imperfect Match: Silicon/Graphite Hybrid Anodes for High‐Energy–Density Lithium‐Ion Batteries

open access: yesAdvanced Energy Materials, EarlyView.
Silicon/graphite (Si/Gr) hybrid anodes are limited by Si's large volume change and mismatch with Gr. This review offers mechanistic insights into imperfectly matched Si/Gr hybrid anodes, elucidating heterogeneous lithiation behavior and interfacial failure pathways, and thereby informing the design of durable, high‐energy–density lithium‐ion batteries.
Jing Li   +6 more
wiley   +1 more source

The adaptive market hypothesis and the return predictability in the cryptocurrency markets

open access: yesEconomics and Business Review, 2023
This study employs robust martingale difference hypothesis tests to examine return predictability in a broad sample of the 40 most capitalized cryptocurrency markets in the context of the adaptive market hypothesis.
Karasiński Jacek
doaj   +1 more source

Birational properties of some moduli spaces related to tetragonal curves of genus 7

open access: yes, 2011
Let M_{7,n} be the (coarse) moduli space of smooth curves of genus 7 with n marked points defined over the complex field. We denote by M^1_{7,n;4} the locus of points inside M_{7,n} representing curves carrying a g^1_4.
Böhning, Christian   +2 more
core   +1 more source

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