Results 21 to 30 of about 74,000 (316)

The Volatility of Realized Volatility [PDF]

open access: yesEconometric Reviews, 2008
In recent years, with the availability of high-frequency financial market data modeling realized volatility has become a new and innovative research direction. The construction of “observable” or realized volatility series from intra-day transaction data and the use of standard time-series techniques has lead to promising strategies for modeling and ...
CORSI, Fulvio   +3 more
openaire   +7 more sources

Recovery of zinc from zinc oxide dust containing multiple metal elements by carbothermal reduction [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2022
A carbothermal reduction process simulating EAF process is used to handle the zinc oxide dust, and the zinc in the dust can be extracted and recovered efficiently. The crude zinc and lead-tin alloy were obtained finally.
Lei F.-G.   +5 more
doaj   +1 more source

Production of Methyl-Iodide in the Environment

open access: yesFrontiers in Microbiology, 2021
Iodine is an essential micronutrient for most of the living beings, including humans. Besides its indispensable role in animals, it also plays an important role in the environment. It undergoes several chemical and biological transformations resulting in
Eva Duborská   +6 more
doaj   +1 more source

Volatility Forecasting [PDF]

open access: yesSSRN Electronic Journal, 2005
Volatility has been one of the most active and successful areas of research in time series econometrics and economic forecasting in recent decades. This chapter provides a selective survey of the most important theoretical developments and empirical insights to emerge from this burgeoning literature, with a distinct focus on forecasting applications ...
Andersen, Torben G.   +3 more
openaire   +5 more sources

Asset Volatility [PDF]

open access: yesSSRN Electronic Journal, 2013
We examine whether fundamental measures of volatility are incremental to market based measures of volatility in (i) predicting bankruptcies (out of sample), (ii) explaining cross-sectional variation in credit spreads, and (iii) explaining future credit excess returns.
Correia, Maria   +2 more
openaire   +3 more sources

Novel cost-effective design for bio-volatilization studies in photosynthetic microalgae exposed to arsenic with emphasis on growth and glutathione modulation

open access: yesFrontiers in Microbiology, 2023
A novel laboratory model was designed to study the arsenic (As) biotransformation potential of the microalgae Chlorella vulgaris and Nannochloropsis sp. and the cyanobacterium Anabaena doliolum. The Algae were treated under different concentrations of As(
Atul K. Upadhyay   +11 more
doaj   +1 more source

Study on the Causes for ICP-MS Signal Intensity Declination of Os Water Absorption Liquid

open access: yesYankuang ceshi, 2018
BACKGROUND Os can be separated from the sample matrix by distillation, and the absorbing liquid can be introduced into ICP-MS directly, which is a key step of the molybdenite Re-Os isotopic age analysis.
ZHOU Li-min   +5 more
doaj   +1 more source

X-Ray fluorescence analysis of feldspars and silicate glass: effects of melting time on fused bead consistency and volatilisation [PDF]

open access: yes, 2011
Reproducible preparation of lithium tetraborate fused beads for XRF analysis of glass and mineral samples is of paramount importance for analytical repeatability.
Bell, Anthony   +11 more
core   +3 more sources

Adsorptive removal of adsorbable organic halogens by activated carbon [PDF]

open access: yesRoyal Society Open Science, 2018
Current research mainly focuses on the reduction of adsorbable organic halogen (AOX) sources, while studies on AOX monitoring and management in the environment are scarce. Organic pollutants in water are mainly fixed by sediments.
Chengrong Qin   +5 more
doaj   +1 more source

Recycling of solvent used in a solvent extraction of petroleum hydrocarbons contaminated soil. [PDF]

open access: yes, 2011
The application of water washing technology for recycling an organic composite solvent consisting of hexane and pentane (4:1; TU-A solvent) was investigated for extracting total petroleum hydrocarbons (TPH) from contaminated soil. The effects of water
Coulon, Frederic   +5 more
core   +1 more source

Home - About - Disclaimer - Privacy