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教育国际交流 2024年第4期 56-60页

作者： Ben Sowter Alice Wei alex berka Simona Bizzozero Sally Zhang QS

英国QS世界大学排名是目前全球的三大权威大学排名之一,每年的排名发布都会吸引全球教育界的目光。2024年6月5日,QS发布了2025版世界大学排名,中国大学整体表现亮眼。本期编辑部特邀Ben Sowter高级副总裁及QS资深学术顾问团队对此次排... 详细信息

英国QS世界大学排名是目前全球的三大权威大学排名之一,每年的排名发布都会吸引全球教育界的目光。2024年6月5日,QS发布了2025版世界大学排名,中国大学整体表现亮眼。本期编辑部特邀Ben Sowter高级副总裁及QS资深学术顾问团队对此次排名进行独家分析,对中国高校的表现作出权威解读,并就“留学中国”的品牌建设提出专业建议。

关键词：学术顾问大学排名副总裁权威解读中国大学整体表现

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CactiViT:Image-based smartphone application and transformer network for diagnosis of cactus cochineal

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Artificial Intelligence in Agriculture 2023年第3期9卷 12-21页

作者： Anas berka Adel Hafiane Youssef Es-Saady Mohamed El Hajji Raphaël Canals Rachid Bouharroud IRF-SIC Laboratory Ibnou Zohr UniversityBP 8106—Cite DakhlaAgadir 80000Morocco INSA CVL University of OrleansPRISME LaboratoryEA 4229Bourges 18022France Regional Center for Agricultural Research of Agadir National Institute of Agricultural ResearchAvenue EnnasrPoB 415 Rabat PrincipaleRabat 10090Morocco

The cactus is a plant that grows in many rural areas,widely used as a hedge,and has multiple benefits through the manufacture of various cosmetics and other ***,this crop has been suffering for some time from the attack of the carmine scaleDactylopius opuntia(Hemiptera:Dactylopiidae).The infestation can spread rapidly if not treated in the early *** solutions consist of regular field checks by the naked eyes carried out by *** major difficulty is the lack of experts to check all fields,especially in remote *** addition,this requires time and *** the need for a system that can categorize the health level of cacti *** date,deep learning models used to categorize plant diseases from images have not addressed the mealy bug infestation of cacti because computer vision has not sufficiently addressed this *** there is no public dataset and smartphones are commonly used as tools to take pictures,it might then be conceivable for farmers to use them to categorize the infection level of their *** this work,we developed a system called CactiVIT that instantly determines the health status of cacti using the Visual image Transformer(ViT)*** also provided a new image dataset of cochineal infested cacti.1 Finally,we developed a mobile application that delivers the classification results directly to farmers about the infestation in their fields by showing the probabilities related to each *** study compares the existing models on the new dataset and presents the results *** VIT-B-16 model reveals an approved performance in the literature and in our experiments,in which it achieved 88.73%overall accuracy with an average of+2.61%compared to other convolutional neural network(CNN)models that we evaluated under similar conditions.

关键词： Cactus Cochineal Smartphones Classification VIT Deep learning

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Synthesis, characterization and biological applications of novel Schiff bases of 2-(trifluoromethoxy) aniline

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Journal of Chinese Pharmaceutical Sciences 2018年第5期27卷 307-323页

作者： Thierry Youmbi Fonkui Monisola Itohan Ikhile Freddy Munyololo Muganza Marthe Carine Djuidje Fotsing Charmaine Arderne Xavier Siwe-Noundou Rui Werner Macedo Krause Derek Tantoh Ndinteh Patrick berka Njobeh Department of Biotechnology and Food Technology University of Johannesburg Department of Applied Chemistry University of Johannesburg Department of Chemistry Sefako Makgatho Health Sciences University Department of Chemistry University of Johannesburg Department of Chemistry Rhodes University

A series of five new Schiff bases(1–5) were synthesized by reacting 2-(trifluoromethoxy) aniline with different aromatic aldehydes. The Schiff base compounds were characterized by spectroscopic and analytical methods. Crystal structure of one new compound was also reported. The pharmacological properties, including antibacterial(14 bacterial species), antifungal(7 strains), antimalarial, anti-trypanosomal and anti-HIV activities of the compounds, were investigated. Cytotoxicity of the tested compounds was evaluated against human cervix adernocarcinoma cells(He La). Bacterial minimum inhibitory concentration(MIC) results by broth microdilution method showed that Bacillus subtilis, Enterococcus faecalis, Staphylococcus aureus, Staphylococcus epidermidis, Proteus vulgaris, Klebsiella oxytoc and Klebsiella pneumonia were more sensitive in the presence of tested compounds with an MIC value of 15.6 μg/m L. All the tested compounds showed good to moderate activity against fungi. The sensitivity of Aspergillus fumigatus was higher than other strains with a minimum cell death concentration(MFC) of 15.6 μg/m L. Compound 1 showed greater antimalarial and anti-trypanosomal properties with very low to no cytotoxic effects against He La cells as compared with compound 5, while other compounds exhibited poor activity. Compounds 1–5 demonstrated good activity against HIV type-1. These Schiff base compounds could be used as good antimicrobial agents.

关键词： Synthesis Biological activity Schiff bases Antimicrobial 2-(Trifluoromethoxy) aniline

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