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South Valley University, Egypt
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University of Science & Technology Beijing , China
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University of Padova, Italy
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University of Waterloo, Canada
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University Mediterranea of Reggio Calabria, Italy
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Huazhong University of Science and Technology, China
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China University of Mining and Technology (CUMT), China
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Shahid Rajaee Teacher Training University (SRTTU), Iran
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Research Institutes of Sweden, Europe
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Al Jouf University, Saudi Arabia
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University of Kragujevac, Europe
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Central South University, China
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China University for Mining and Technology , China
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Xi an Jiaotong University, China
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Hunan Normal University, China
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Helmholtz Center for Environmental Research, Germany
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Firat University, Turkey
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Victor Hugo Institute, Cameroon
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Flinders university, Australia
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Dalhousie University, Canada