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SCImago Journal Rank (SJR indicator) is a measure of scientific influence of scholarly journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from.
: Released in 2026 for $549 , this device features a 6.58-inch 120Hz display and is powered by a Qualcomm Dragonwing QCM6490 SoC . It is unique for its ability to triple-boot Android 16, Linux, and Windows 11 . When running Windows 11, it uses a custom "NexOS" shell that emulates the classic grid-style interface of the original Windows Phone . Legacy Microsoft Surface (Android-Based)
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Microsoft no longer manufactures or supports its own smartphone hardware, having officially discontinued the Surface Duo 2 and ended its software support in October 2024 . However, enthusiasts can still find legacy devices or look toward new third-party alternatives released in 2026.
The Surface Duo line was Microsoft's final attempt at mobile hardware, featuring a unique dual-screen "passport" form factor. Surface Duo in 2026
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Impact factor (IF) is a scientometric factor based on the yearly average number of citations on articles published by a particular journal in the last two years. A journal impact factor is frequently used as a proxy for the relative importance of a journal within its field. Find out more: What is a good impact factor?
Any impact factor or scientometric indicator alone will not give you the full picture of a science journal. There are also other factors such as H-Index, Self-Citation Ratio, SJR, SNIP, etc. Researchers may also consider the practical aspect of a journal such as publication fees, acceptance rate, review speed. (Learn More)
The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications