Mental representation of absent objects and events is a major cognitive achievement. Research is presented that explores how toddlers (2- to 3-year-old children) search for hidden objects and understand out-of-sight events. Younger children fail to use visually obvious cues, such as a barrier that blocks a moving object's path. Spatiotemporal information provided by movement cues directly connected to the hidden object is more helpful. A key problem for toddlers appears to be difficulty in representing a spatial array involving events with multiple elements.
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http://dx.doi.org/10.1016/S0079-6123(07)64012-6 | DOI Listing |
J Gastroenterol Hepatol
December 2024
Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.
Background And Object: It is a challenging step to guide a nasobiliary catheter from the mouth to the nasal cavity in endoscopic nasobiliary drainage (ENBD), and new methods are always being explored to improve the procedure. We have developed a novel device which is composed of a dedicated adjustable snare and a tongue depressor-like handle, for completing oral-nasal conversion of the ENBD tube. In this study, we aim to assess the utility of our new technique in repositioning the ENBD catheter by comparing it with conventional guidewire technique.
View Article and Find Full Text PDFHippocampus
January 2025
Department of Cognitive and Psychological Sciences, Brown University, Providence, Rhode Island, USA.
For most of my career, I focused on understanding how and where spatial context, the place where things happen, is represented in the brain. My interest in this began in the early 1990's, during my postdoctoral training with David Amaral, when we defined the rodent homolog of the primate parahippocampal cortex, a region implicated in processing spatial and contextual information. We parceled out the caudal portion of the rat perirhinal cortex (PER) and called it the postrhinal cortex (POR).
View Article and Find Full Text PDFJ Mol Graph Model
December 2024
School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015, Switzerland. Electronic address:
MolecularWebXR is a new web-based platform for education, science communication and scientific peer discussion in chemistry and biology, based on modern web-based Virtual Reality (VR) and Augmented Reality (AR). With no installs as it is all web-served, MolecularWebXR enables multiple users to simultaneously explore, communicate and discuss concepts about chemistry and biology in immersive 3D environments, by manipulating and passing around objects with their bare hands and pointing at different elements with natural hand gestures. Users may either be present in the same physical space or distributed around the world, in the latter case talking naturally with each other thanks to built-in audio.
View Article and Find Full Text PDFSci Data
December 2024
Shanghai Jiaotong University School of Medicine, Shanghai, China.
Edible oil may be mixed with tiny solid impurities like raw material fragments, hair, metal fragments and etc. during the production and manufacturing process. For food safety reasons, these tiny impurities need to be detected in the quality control process.
View Article and Find Full Text PDFPLoS One
December 2024
Department of Computer Engineering, Jordan University of Science and Technology, Irbid, Jordan.
The electroencephalogram (EEG) is a major diagnostic tool that provides detailed insight into the electrical activity of the brain. This signal contains a number of distinctive waveform patterns that reflect the subject's health state in relation to sleep, neurological disorders, memory functions, and more. In this regard, sleep spindles and K-complexes are two major waveform patterns of interest to specialists, who visually inspect the recordings to identify these events.
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