Results 71 to 80 of about 395,580 (223)
ARCH and GARCH Models vs. Martingale Volatility of Finance Market Returns [PDF]
arXiv, 2008 ARCH and GARCH models assume either i.i.d. or (what economists lable as) white noise as is usual in regression analysis while assuming memory in a conditional mean square fluctuation with stationary increments. We will show that ARCH/GARCH is inconsistent with uncorrelated increments, violating the i.i.d.
arxiv
A NUMERICAL APPLICATION TO PREDICT THE RESISTANCE AND WAVE PATTERN OF KRISO CONTAINER SHIP
Brodogradnja, 2016 In this study, the computational results for KRISO Container Ship (KCS) are presented. CFD analyses are performed to simulate free surface flow around KCS by using RANS approach with success.
Yavuz Hakan Ozdemir +3 more
doaj +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Background Volumetric modulated arc therapy (VMAT) requires an accurate patient‐specific quality assurance (PSQA) program. In clinical practice, this is usually performed using the γ‐index and the two‐dimensional gamma passing rate (2D %GP). A three‐dimensional (3D) index incorporating the patient anatomy could be more useful for the 3D dose ...
Christos Zarros +6 more
wiley +1 more source
The Origin of the Dust Arch in the Halo of NGC 4631: An Expanding Superbubble? [PDF]
, 2003 We study the nature and the origin of the dust arch in the halo of the edge-on galaxy NGC 4631 detected by Neininger & Dumke (1999). We present CO observations made using the new On-The-Fly mapping mode with the FCRAO 14m telescope, and find no evidence for CO emission associated with the dust arch. Our examination of previously published HI data shows
arxiv +1 more source
Strengthening Indonesia's Economic Growth with Islamic and non-Islamic Macroeconomic Variable
Economica: Jurnal Ekonomi Islam, 2020 : This research was conducted to determine the effect of taxes, Sukuk, grants, inflation, foreign debt, total financing, and the network of Islamic bank offices on Indonesia's economic growth.
Eba Ismi Alifah, Anton Bawono
doaj +1 more source
Evaluation of daily residual pancreatic tumor motion for deep‐inspiration breath‐hold radiotherapy
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Breath‐hold techniques are widely used in radiation therapy to minimize respiratory‐induced tumor or organ‐at‐risk motion. However, residual motion persists, necessitating a reliable daily evaluation method. Methods At our institution, fiducial markers serve as surrogates for target localization in pancreatic cancer treatment.
Weihua Mao +4 more
wiley +1 more source
Disks in the Arches cluster -- survival in a starburst environment [PDF]
, 2010 Deep Keck/NIRC2 HK'L' observations of the Arches cluster near the Galactic center reveal a significant population of near-infrared excess sources. We combine the L'-band excess observations with K'-band proper motions, to confirm cluster membership of excess sources in a starburst cluster for the first time.
arxiv +1 more source
Use of recycled tires in non-structural concrete
MATEC Web of Conferences, 2017 This research addresses the issue of tire waste management and natural aggregate resource depletion. It investigates use of commercially produced recycled tire rubber as replacement for fine and coarse aggregate in non-structural concrete.
Al Rawahi Zamzam, Bilal Waris Muhammad
doaj +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose This study compares the dosimetric accuracy of deep‐learning‐based MR synthetic CT (sCT) in brain radiotherapy between the Analytical Anisotropic Algorithm (AAA) and AcurosXB (AXB). Additionally, it proposes a novel metric to predict the dosimetric accuracy of sCT for individual post‐surgical brain cases.
Jeffrey C. F. Lui +3 more
wiley +1 more source
Testing second order dynamics for autoregressive processes in presence of time-varying variance [PDF]
arXiv, 2012 The volatility modeling for autoregressive univariate time series is considered. A benchmark approach is the stationary ARCH model of Engle (1982). Motivated by real data evidence, processes with non constant unconditional variance and ARCH effects have been recently introduced.
arxiv