Gaining Information about a Polar Region The northern polar regions have been inhabited for centuries, and native folklore contributes much to the knowledge scientists have about these regions. The southern polar lands, however, are uninhabited. An expedition led by Norwegian explorer Roald Amundsen bec...
Retrotransposons are sometimes inserted into a gene promoter region in which case they function as a genetic switch. That can have one of four general outcomes. A good or bad gene can be turned on or off. The long interspersed element 151 appears to be especially important in the human ...
ShowTemplateRegionLabel ShowTrimmedCallTree ShowVisualAids ShowWordDiff 關閉 SideBySide SignatureFile SigningKey Silverlight SilverlightApplication SilverlightDictionary SilverlightFolderClosed SilverlightFolderOpened SilverlightLibrary SilverlightPhone SilverlightTemplate SilverlightUserControl SilverlightVideo SilverlightWebSite...
At low frequencies of about 10 Hz, the changes in bioimpedance measured in the transthoracic region are mainly related to breathing, as the resistance measured at low frequencies increases steadily with inhalation due to air entering the lungs and decreases in turn when exhaling [25]; this is ...
The best of National Geographic delivered to your inbox Sign up for more inspiring photos, stories, and special offers from National Geographic. Sign Up
The Arctic Ocean may be the world's smallest, but it's becoming a critical region as climate change warms it more quickly than anywhere else on Earth.
2) Specify 4 points to set a quadrilateral region for intrusion detection. Only one region can be set. Motion Detection 1) Click the icon. 2) Hold the mouse on the image to draw the detection area manually. 3) Click Search to search the ...
& Sun, J. Faster R-CNN: Towards real-time object detection with region proposal networks. IEEE Trans. Pattern Anal. Mach. Intell. 39(6), 1137–1149 (2016). Article PubMed Google Scholar J. Redmon, A. Farhadi. Yolov3: An incremental improvement. (2018). arXiv preprint arXiv:...
However, the MHC region is characterized by strong linkage disequilibrium45, meaning that relatively small segments of the MHC provide valuable information about the larger complex. To confirm that we were genotyping a putatively functional MHC locus and not a pseudogene, we took a number of steps...
He found that the amount of pollen recovered in these sediments is so low that the Beringian landscape during the peak of the last glaciation was more likely to have been what he termed a "polar desert," with little or only sparse vegetation, in no way was it possible that this region ...