Results 31 to 40 of about 1,135,626 (257)

Logistics-related determinants of regional gross domestic product - an exploratory investigation

European Journal of Transport and Infrastructure Research, 2022
Existing research suggests a link between a country’s infrastructure quality and its economic performance. However, no country can invest in all types of infrastructure across the country.
Matthias Winter, Ila Manuj, Markus Gerschberger   +2 more
doaj  

Current Challenges in Visibility Improvement in Sichuan Basin

Geophysical Research Letters, 2022
The visibility in the Sichuan Basin (SB) was worse than that in the North China Plain (NCP) for the same level of PM2.5. One well‐known reason is that the aerosol extinction enhancement due to hygroscopic growth in the SB was stronger than that in the ...
Gang Zhao, Min Hu, Zirui Zhang, Lizi Tang, Dongjie Shang, Jie Ren, Xiangxinyue Meng, Yuan Zhang, Miao Feng, Yina Luo, Shishi Yang, Qinwen Tan, Danlin Song, Song Guo, Zhijun Wu, Limin Zeng, Yuanhang Zhang, Shaodong Xie   +17 more
doaj   +1 more source

Visibility and communication of small NGOs in the context of digital transformation [PDF]

Journal of Research and Innovation for Sustainable Society, 2021
In the current context generated by the ubiquity of digital technologies in all aspects of socio-economic life, the NGOs that succeed in integrating smart tools into their development strategies are those that have a high chance of adapting ...
Aniela Bălăcescu
doaj   +1 more source

Exact results of the limited penetrable horizontal visibility graph associated to random time series and its application [PDF]

, 2017
The limited penetrable horizontal visibility algorithm is a new time analysis tool and is a further development of the horizontal visibility algorithm.
Dong, Gaogao, Du, Ruijin, Stanley, H. Eugene, Tian, Lixin, Vilela, Andre L. M., Wang, Minggang, Zhao, Longfeng   +6 more
core   +3 more sources

Visibility Domain Direction-of-Arrival Optimization for Arbitrary 2-D Arrays

IEEE Access, 2022
A visibility-modelling based method is introduced to determine the elevation and azimuth angles for a signal received at a quasi-randomly arranged (2-D) array.
Nicholas Bruce, Jeff Stacey, Peter F. Driessen   +2 more
doaj   +1 more source

Weak Visibility Queries of Line Segments in Simple Polygons [PDF]

, 2012
Given a simple polygon P in the plane, we present new algorithms and data structures for computing the weak visibility polygon from any query line segment in P. We build a data structure in O(n) time and O(n) space that can compute the visibility polygon
Chen, Danny Z., Wang, Haitao
core   +1 more source

Observations and projections of visibility and aerosol optical thickness (1956–2100) in the Netherlands: impacts of time-varying aerosol composition and hygroscopicity

Environmental Research Letters, 2015
Time series of visibility and aerosol optical thickness for the Netherlands have been constructed for 1956–2100 based on observations and aerosol mass scenarios. Aerosol optical thickness from 1956 to 2013 has been reconstructed by converting time series
R Boers, M van Weele, E van Meijgaard, M Savenije, A P Siebesma, F Bosveld, P Stammes   +6 more
doaj   +1 more source

Finite bias visibility of the electronic Mach-Zehnder interferometer [PDF]

, 2007
We present an original statistical method to measure the visibility of interferences in an electronic Mach-Zehnder interferometer in the presence of low frequency fluctuations.
Cavanna, A., Gaini, G., Gennser, U., Glattli, D. C., Mailly, D., Portier, F., Roche, P., Roulleau, Preden   +7 more
core   +1 more source

Gamma-Ray Pulsar Visibility

, 2005
PSR J0437-4715 is a millisecond pulsar (MSP) thought to be ``pair formation starved'' (having limited pair cascades due to magnetic photon absorption).
de Jager, O. C., Tiplady, A., Venter, C.
core   +2 more sources

Wavelength dependence of angular diameters of M giants: an observational perspective [PDF]

, 1999
We discuss the wavelength dependence of angular diameters of M giants from an observational perspective. Observers cannot directly measure an optical-depth radius for a star, despite this being a common theoretical definition.
A. P. Jacob, Baschek, Bedding, Bedding, Bedding, Bessell, Bessell, Bessell, Bessell, Brett, Burns, Cheng, Hajian, Haniff, Hestroffer, Hofmann, Hofmann, J. G. Robertson, Jacob, M. Scholz, Perrin, Scholz, Scholz, Scholz, T. R. Bedding, Tuthill, Watanabe, Weigelt, Wilson, Young   +29 more
core   +2 more sources