Results 81 to 90 of about 371,806 (272)

Numerical investigation of the thermal-hydraulic performance of a novel parabolic trough wavy tubular receiver by using FMWNCT/oil-nanofluid coupled with fins

Case Studies in Thermal Engineering
This study employs a computational fluid dynamics (CFD) approach to assess the performance of a novel wavy profile tube receiver. It integrates rectangular fins and an Oil-based nanofluid, specifically utilizing Thermodyne GG-03 synthetic oil combined ...
S.M.A. Rahman, Salah Issa, Abdul Ghani Olabi, Mohammad Ali Abdelkareem   +3 more
doaj   +1 more source

Estudio espectroscópico experimental y computacional de Ibuprofeno y sus precursores de síntesis

La Granja: Revista de Ciencias de la Vida, 2015
Se presenta un estudio comparativo de los espectros infrarrojo (IR) y ultravioleta/visible (UV/VIS) de ibuprofeno, isobutilbenceno y 4-isobutilacetofenona obtenidos experimentalmente, con los calculados computacionalmente.
Sebastián Cuesta, Lorena Meneses
doaj   +1 more source

A Chandra Snapshot Survey for 3C Radio Galaxies with redshifts between 0.3 and 0.5

, 2013
This paper contains an analysis of short Chandra observations of 19 3C sources with redshifts between 0.3 and 0.5 not previously observed in the X-rays.
Bonafede, A., Harris, D. E., Liuzzo, E., Massaro, F., Paggi, A., Tremblay, G.   +5 more
core   +1 more source

Pd‐Catalyzed Cyclotrimerization and Cycloaddition of 5,6‐Didehydrobenzo[8]annulenes (BenzoCOTynes): Formation of Nonplanar Tri[8]annulenes and Diels–Alder Cycloadducts

European Journal of Organic Chemistry, EarlyView.
A Pd(0)‐catalyzed cyclotrimerization of benzoCOTynes to form tri(benzo[8]annulenes) was developed. Three distinct isomers were isolated and structurally characterized by single‐crystal X‐ray diffraction. Ligand modulation proved crucial for enhancing regioselectivity: P(4‐OMePh), and (S)‐tBu‐Phox promoted the formation of the symmetric isomers.
Jesús Bello‐García, Jesús A. Varela, Carlos Saá   +2 more
wiley   +1 more source

ESTUDIO DE EFECTOS ASIMÉTRICOS Y DÍA DE LA SEMANA EN EL ÍNDICE DE VOLATILIDAD 'VIX' STUDY OF ASYMMETRIC AND DAY OF THE WEEK EFFECTS IN 'VIX'* VOLATILITY INDEX

Revista Ingenierías Universidad de Medellín, 2007
En este trabajo se estudian los efectos asimétricos y día de la semana en el Índice de Volatilidades VIX de la Chicago Board Option Exchange del 02/01/2003 al 30/03/2007.
Pilar Beatriz Álvarez Franco, Diego Alexánder Restrepo, Fredy Ocaris Pérez   +2 more
doaj  

Comparison study of CC and CH vibration frequencies and eelectronic properties for mono, Di, Tri, and tetra-rings layer of arm chair (SWCNTs)

Iraqi Journal of Physics, 2019
Semi-empirical methods were applied for calculating the vibration frequencies and IR absorption intensities for normal coordinates of the {mono (C56H28), di (C84H28), tri (C112H28) and tetra (C140H28)} -rings layer for (7,7) armchair single wall carbon ...
Huda N. Al-Ani
doaj   +1 more source

Earthquake and Tsunami NaTech Risk Assessment for Oil Storage Facilities

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Interaction of natural and technological hazards (NaTech) events, such as tsunamis and earthquakes, can affect industrial facilities such as those featuring anchored atmospheric storage tanks. Consequences of natural events on this kind of installation may include the release of hazardous substances, which in turn can lead to industrial ...
Georgios Baltzopoulos, Pasquale Cito, Federica Ricci, Manuela Volpe, Jacopo Selva, Valerio Cozzani, Iunio Iervolino   +6 more
wiley   +1 more source

Theoretical and computational investigations on estimation of viscosity of ionic liquids for green adsorbent: Effect of temperature and composition

Case Studies in Thermal Engineering
Ionic liquids can be recognized as green adsorbent for water purification due to their superior characteristics compared to conventional organic solvents.
Zhaoxiong Han
doaj   +1 more source

Quantifying dynamics of the financial correlations

, 2001
A novel application of the correlation matrix formalism to study dynamics of the financial evolution is presented. This formalism allows to quantify the memory effects as well as some potential repeatable intradaily structures in the financial time ...
Campbell, Cizeau, Drożdż, Drożdż, Drożdż, Edelman, Elton, F. Grümmer, F. Ruf, Feigenbaum, J. Kwapień, J. Speth, Kullmann, Kwapień, Laloux, Mantegna, Mantegna, Markowitz, Mehta, Plerou, S. Drożdż, Sengupta, Sornette, Sornette, Stanley, Wigner   +25 more
core   +1 more source

A Deep Learning Framework for Forecasting Medium‐Term Covariance in Multiasset Portfolios

Journal of Forecasting, EarlyView.
ABSTRACT Forecasting the covariance matrix of asset returns is central to portfolio construction, risk management, and asset pricing. However, most existing models struggle at medium‐term horizons, several weeks to months, where shifting market regimes and slower dynamics prevail.
Pedro Reis, Ana Paula Serra, João Gama
wiley   +1 more source