Results 71 to 80 of about 18,304 (313)

Multivariate GARCH Models: A Survey [PDF]

SSRN Electronic Journal, 2003
AbstractThis paper surveys the most important developments in multivariate ARCH‐type modelling. It reviews the model specifications and inference methods, and identifies likely directions of future research. Copyright © 2006 John Wiley & Sons, Ltd.
BAUWENS, Luc, LAURENT, Sébastien, ROMBOUTS, Jeroen   +2 more
openaire   +5 more sources

Identification and Reversible Optical Switching of NV+ Centers in Diamond

Advanced Functional Materials, EarlyView.
NV+ centers in diamond are predicted to coexist with NV0 and NV– centers, but direct experimental confirmation remains challenging. Using positron annihilation spectroscopy with in situ light illumination, a charge transition NV+/0 is observed at 1.234(8) eV.
Marcel Dickmann, Lucian Mathes, Ricardo Helm, Vassily Vadimovitch Burwitz, Werner Egger, Johannes Mitteneder, Christoph Hugenschmidt, Peter Sperr, Maik Butterling, Maciej Oskar Liedke, Andreas Wagner, Joachim Dorner, Thomas Schwarz‐Selinger, Günther Dollinger   +13 more
wiley   +1 more source

Fast Sodium Ion Conductivity in Pristine Na8SnP4: Synthesis, Structure and Properties of the Two Polymorphs LT‐Na8SnP4 and HT‐Na8SnP4

Angewandte Chemie, EarlyView.
Sodium‐ion conductors show great promise for use in rechargeable solid‐state batteries due to the high natural abundance of sodium. As a pristine material, Na8SnP4 demonstrates relatively high ionic conductivity and offers significant room for further enhancement, owing to its structure built on well‐known tetrahedral building blocks. Additionally, its
Manuel Botta, Samuel Merk, Robert J. Spranger, Anatoliy Senyshyn, Volodymyr Baran, Vadim Dyadkin, Leo van Wüllen, Thomas F. Fässler   +7 more
wiley   +2 more sources

EVIDENCE OF TIME-VARYING HERDING BEHAVIOR FROM THE VIETNAMESE STOCK MARKET

Tạp chí Khoa học Đại học Đà Lạt, 2017
Using a regression model of the cross-sectional dispersion in stock returns, this study investigates investor herding behavior in Vietnamese stock market spanning the period from June 01, 2007 to November 30, 2015.
Đoàn Anh Tuấn, Hoàng Mai Phương
doaj   +1 more source

Upconversion Nanoparticle‐Covalent Organic Framework Core–shell Particles as Therapeutic Microrobots Trackable With Optoacoustic Imaging

Advanced Materials, EarlyView.
Upconversion nanoparticle‐covalent organic framework core–shell particles provide enhanced contrast for optoacoustic imaging by leveraging the optical absorption of upconversion luminescence within the covalent organic framework matrix. Beyond their role as contrast agents, these particles enable customizable therapeutic agent loading and release, as ...
Dong Wook Kim, Paul Wrede, Andrés Rodríguez‐Camargo, Yi Chen, Nihal Olcay Dogan, Chaim Glück, Bettina V. Lotsch, Daniel Razansky, Metin Sitti   +8 more
wiley   +1 more source

Intelligent model for forecasting fluctuations in the gold price [PDF]

تصمیم گیری و تحقیق در عملیات
Purpose: The present study aims to identify the most important variables affecting the fluctuations of gold prices. It is the first Iranian research in which the fluctuations in this market are modeled using non-linear Bayesian Model Averaging (BMA) and ...
Mahdieh Tavassoli, Mahnaz Rabeei, Kiamars Fathi Hafshejani   +2 more
doaj   +1 more source

Quan hệ nhân quả giữa lạm phát và sự bất định lạm phát: Nghiên cứu tại một số nước Đông Nam Á

Tạp chí Khoa học Đại học Mở Thành phố Hồ Chí Minh - Kinh tế và Quản trị kinh doanh, 2023
Bài nghiên cứu có mục tiêu khám phá mối quan hệ nhân quả giữa lạm phát và sự bất định của lạm phát tại một số quốc gia Đông Nam Á. Số liệu sử dụng trong quá trình nghiên cứu được thu thập từ tháng 01 năm 2008 đến tháng 12 năm 2019.
Lê Thông Tiến, Võ Thị Thúy Kiều   +1 more
doaj   +1 more source

GARCH copulas and GARCH-mimicking copulas

The bivariate copulas that describe the dependencies and partial dependencies of lagged variables in strictly stationary, first-order GARCH-type processes are investigated. It is shown that the copulas of symmetric GARCH processes are jointly symmetric but non-exchangeable, while the copulas of processes with symmetric innovation distributions and ...
Dias, Alexandra, Han, Jialing, McNeil, Alexander J.   +2 more
openaire   +2 more sources

Exploring DNA Functionalization Techniques for Silver Nanoparticles

Advanced Materials Interfaces, EarlyView.
This study evaluates four functionalization methods—salt‐aging, pH‐assisted, freezing‐directed, and microwave‐assisted—for attaching DNA strands to 20 nm silver nanoparticles (AgNPs). The resulting DNA‐AgNP conjugates are characterized and colloidal stability and DNA loading are assessed.
Sebastian Freko, Marta Nikić, Lennart J.K. Weiß, Bernhard Wolfrum   +3 more
wiley   +1 more source

The Substituent‐Effect in NHCP‐Plumbylenes with a Phosphaplumbene Character

Angewandte Chemie, EarlyView.
The synthesis of aryl‐ and silyl‐substituted NHCP‐plumbylenes is achieved through metathesis reactions. Based on computational studies, the substituent effect and the potential double bond character in these species are discussed. A formal [2+2] cycloaddition at a P−Pb bond demonstrates the synthetic equivalence to double bonds.
Martin E. Doleschal, Arturo Espinosa Ferao, Arseni Kostenko, Fiona J. Kiefer, Shigeyoshi Inoue   +4 more
wiley   +2 more sources