Results 21 to 30 of about 5,025,116 (269)

Impact of tail loss on the behaviour and locomotor performance of two sympatric Lampropholis skink species. [PDF]

open access: yesPLoS ONE, 2012
Caudal autotomy is an anti-predator behaviour that is used by many lizard species. Although there is an immediate survival benefit, the subsequent absence of the tail may inhibit locomotor performance, alter activity and habitat use, and increase the ...
Gillian L Cromie, David G Chapple
doaj   +1 more source

Is pre-freeze sperm preparation more advantageous than post-freeze?

open access: yesReproduction and Fertility, 2021
Human sperm cryopreservation is characterised to this day by sub-optimal success rates. Interestingly, a traditional approach to improving post-thaw outcome has been to integrate standard sperm preparation techniques into freezing protocols as a means of
Dimitra Apostolia Androni   +3 more
doaj   +1 more source

Portfolio Selection Models Based on Interval-Valued Conditional Value-at-Risk (ICVaR) and Case Study on the Data from Stock Markets

open access: yesFractal and Fractional, 2022
Risk management is very important for individual investors or companies. There are several ways to measure the risk of investment. Prices of risky assets vary rapidly and randomly due to the complexity of finance market. Random interval is a good tool to
Jinping Zhang, Keming Zhang
doaj   +1 more source

An extended TDM method under probabilistic interval-valued hesitant fuzzy environment for stock selection.

open access: yesPLoS ONE, 2021
Generally, in real decision-making, all the pieces of information are used to find the optimal alternatives. However, in many cases, the decision-makers (DMs) only want "how good/bad a thing can become." One possibility is to classify the alternatives ...
Qasim Noor   +2 more
doaj   +1 more source

Optimal Setting for Hurst Index Estimation and Its Application in Chinese Stock Market

open access: yesIEEE Access, 2021
The Hurst index is widely used to describe the long memory process of time series in economics, finance, and other fields. The setting for Hurst index estimation has not been thoroughly investigated by current literature.
Liang Ding   +3 more
doaj   +1 more source

Analytical Modeling and Design of Novel Conical Halbach Permanent Magnet Couplings for Underwater Propulsion

open access: yesJournal of Marine Science and Engineering, 2021
Permanent magnet couplings can convert a dynamic seal into a static seal, thereby greatly improving the stability of the underwater propulsion unit. In order to make full use of the tail space and improve the transmitted torque capability, a conical ...
Yukai Li   +4 more
doaj   +1 more source

Tail risk adjusted clean energy portfolios in P2P transactive markets using Rachev ratio

open access: yesEnergy Conversion and Economics, 2023
Renewable energy sources (RES) and electric vehicles (EVs) pose ‘energy‐risk’ in peer energy commitments due to their temporal and spatial uncertainties. Thus, optimistic commitments in the peer‐to‐peer transactive energy market (P2P TEM) are improbable.
Jisma M   +3 more
doaj   +1 more source

Sexy streamers? The role of natural and sexual selection in the evolution of hirundine tail streamers [PDF]

open access: yes, 2001
In this comment we review some experiments, which address the initial selection pressures promoting the development of tail streamers in some hirundine species.
Buchanan, Katherine Louise   +5 more
core   +1 more source

Development of E-rickshaw driving cycle (ERDC) based on micro-trip segments using random selection and K-means clustering techniques

open access: yesIATSS Research, 2021
In India, auto rickshaws are the most convenient and cheapest mode of near-to-door transport in both rural and urban areas. Such vehicles powered with internal combustion engines (ICEs) are one of the main sources of pollutants on urban corridors.
C. Chandrashekar   +3 more
doaj   +1 more source

The impact of heavy tails and comovements in downside-risk diversification [PDF]

open access: yes, 2007
This paper uncovers the factors influencing optimal asset allocation for downside-risk averse investors. These are comovements between assets, the product of marginal tail probabilities, and the tail index of the optimal portfolio.
Gonzalo, Jesús, Olmo, José
core   +2 more sources

Home - About - Disclaimer - Privacy