Results 11 to 20 of about 165,943,994 (180)

The role of macroeconomic and geopolitical news on gold returns and volatility [PDF]

, 2021
The goal of this paper is to explore the simultaneous role of macroeconomic and geopolitical news in gold returns and its associated volatility. The analysis uses sentiment scores for certain macroeconomic and geopolitical global news, along with a GARCH
Apergis, Nicholas, Saeed, Tareq, Hayat, Tasawar   +2 more
core   +1 more source

Adaptive colour constancy algorithm using discrete wavelet transform [PDF]

, 2012
The colours of chromatically homogeneous object surfaces measured by a sensor vary with the illuminant colour used to illuminate the objects. In contrast, colour constancy enables humans to identify the true colours of the surfaces under varying ...
Tjahjadi, Tardi, Turgay Celik, Tardi Tjahjadi, Çelik, Turgay   +3 more
core   +1 more source

Size constancy in bat biosonar? [PDF]

, 2013
Perception and encoding of object size is an important feature of sensory systems. In the visual system object size is encoded by the visual angle (visual aperture) on the retina, but the aperture depends on the distance of the object. As object distance
Heinrich, Melina, Melina Heinrich, Heinrich Melina, Wiegrebe, L., Heinrich, M., Wiegrebe Lutz, Wiegrebe, Lutz, Lutz Wiegrebe   +7 more
core   +2 more sources

The impact of geopolitical risks on travel and leisure stocks [PDF]

, 2019
The impact of geopolitical risks on tourism has not received scholarly attention in the existing literature. Previous studies focus on the effects of terrorism, which is a subset of geopolitical risks.
Demiralay, S, Demiralay, Sercan, Kilincarslan, E, Kilincarslan, Erhan   +3 more
core   +1 more source

Colour constancy [PDF]

, 2020
At first pass, colour constancy occurs when one sees a thing in one’s environment to have a stable colour despite differences in the way it is illuminated at a time (simultaneous constancy) or over time (successive constancy).
Brown, Derek H., Derek H. Brown
core   +1 more source

Does geopolitical risks predict stock returns and volatility of leading defense companies? Evidence from a nonparametric approach [PDF]

, 2017
We use the k-th order nonparametric causality test at monthly frequency over the period of 1985:1 to 2016:06 to analyze whether geopolitical risks can predict movements in stock returns and volatility of twenty-four global defense firms.
Apergis, Nicholas, Gupta, Rangan, Nicholas Apergis, Bonato, Matteo, Matteo Bonato, Rangan Gupta, Clement Kyei, Gupta, Ragan, Kyei, Clement Kweku, Kyei, Clement   +9 more
core   +1 more source

The influence of economic policy uncertainty and geopolitical risk on U.S. citizens overseas air passenger travel by regional destination [PDF]

, 2020
This research note extends the literature on the role of economic policy uncertainty and geopolitical risk on U.S. citizens overseas air travel through the examination of the forecast error variance decomposition of total overseas air travel and by ...
Apergis, Nicholas, Payne, James
core   +1 more source

Research priorities for child and adolescent physical activity and sedentary behaviours : an international perspective using a twin-panel Delphi procedure [PDF]

, 2013
BACKGROUND: The quantity and quality of studies in child and adolescent physical activity and sedentary behaviour have rapidly increased, but research directions are often pursued in a reactive and uncoordinated manner.
Nigg, Claudio, Timothy Olds, Tremblay, M, Tomkins, G, Michael Chia, Reilly, J, Zayed, K, Maddison, R., Andersen, LB, Tomkinson, Grant, Van Mechelen, Willem, Kent Kawalski, Dorovolomo, Jeremy, Thomas, N.E., Andersen, Lars, Christie, C, Mota, J., Non Thomas, Thomas, NE, Kawalski, K, Andersen, Lars Bo, Hamlin, M, Esther Van Sluijs, Kawalski, Kent, Chia, Michael, Cerin, E., Grant Tomkinson, Stratton, G., Zayed, K., Onywera, Vincent, Lauren Gillis, Tomkinson, G., Manuel Carrizosa, Gills, L, Moreira, C., Nigg, C, Gorely, Trish, Mark Tremblay, Biddle, S., Hamlin, Mike, Stuart Biddle, Van Sluijs, Esther, Tremblay, M., Jorge Mota, Carla Moreira, Mike Hamlin, Chia, M, Thomas, Non, Tomkinson, G, Onywera, V, Ian Janssen, Biddle, Stuart, Mota, J, Gillis, Lauren, Janssen, I, Claudio Nigg, Jeremy Dorovolomo, Stratton, Gareth, Onywera, V., Christie, C., Gillis, L, Andersen, L, Reilly, John J., Olds, T, Cerin, E, Vincent Onywera, Tremblay, Mark, Carrizosa, Manuel, Janssen, I., Lars Andersen, Carrizosa, M., Mota, Jorge, Sluijs, Esther Van, Gillis, L., Ralph Maddison, Van Mechelen, W, Olds, T., Trish Gorely, Nigg, C., Van Sluijs, E, Christie, Candice, Janssen, Ian, Carrizosa, M, Reilly, John J, Dorovolomo, J, Kawalski, K., Moreira, Carla, Cerin, Ester, Maddison, R, Biddle, S, Reilly, John, Moreira, C, Reilly, J.J., Maddison, Ralph, Dorovolomo, J., John J Reilly, Andersen, L.B., Hamlin, Michael, Willem Van Mechelen, Chia, M., Zayed, Kashef, Olds, Timothy, Stratton, G, van Mechelen, W., van Sluijs, E., Gareth Stratton, Thomas, Non Eleri, Kashef Zayed, Mechelen, Willem Van, Hamlin, M., Ester Cerin, Thomas, N, Gorely, T., Reilly, JJ, Gorely, T, Candice Christie, Gillis, L.H.E., Olds, T.S., Andersen, Lars B, Jorge, M., Thomas, Non E, Tomkinson, G.R., Mechelen, W.V., Sluijs, E.V.   +123 more
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Cost‐Effective Ti/Al/Ni Multilayer Neural Probes With In Vivo Recording Performance Comparable to Ti/Au Neural Probes

Advanced Electronic Materials, EarlyView.
In this study, we developed a cost‐efficient neural probe by replacing traditional gold with an aluminum‐based Ti/Al/Ni multilayer stack. Optimizing this metal architecture suppressed oxidation and ensured robust electrical stability, achieving signal quality comparable to standard gold probes. It enables a highly accessible and economical solution for
Sehwan Park, Minseok Kim, Giheon Kim, Seungjun Lee, Haeyun Lee, Namsun Chou, Hyogeun Shin   +6 more
wiley   +1 more source

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

Advanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim, Seoa Kim, Erik A. Wu, Darren H. S. Tan, Shawn Peng, Xiaolin Li   +5 more
wiley   +1 more source