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Novel physical phenomena can emerge in low-dimensional nanomaterials. Bulk MoS 2 , a prototypical metal dichalcogenide, is an indirect bandgap semiconductor with negligible photoluminescence. When the MoS 2 crystal is thinned to monolayer, however, a strong photoluminescence emerges, indicating an indirect to direct bandgap transition in this d-electron(More)
It is unclear how neural correlates of episodic memory retrieval differ depending on the type of material that is retrieved. Here, we used a source memory task to compare electrical brain activity for the recollection of three types of stimulus material. At study, healthy adults judged how well visually presented objects, words, and faces fitted with paired(More)
Lattice thermal conductivity ␬ l of Si with nanometer-sized pores along the ͓001͔ direction is calculated as a function of pore diameter ͑d p ͒ and pore spacing ͑d s ͒ by employing a molecular dynamics approach. Our results show that ␬ l across pores is smaller than the bulk value by over two orders of magnitude at room temperature, and that it decreases(More)
It has been shown that the effectiveness with which unpleasant events are encoded into memory is related to brain activity set in train before the events. Here, we assessed whether encoding-related activity before an aversive event can be modulated by emotion regulation. Electrical brain activity was recorded from the scalps of healthy women while they(More)
The case of a woman with absence of neurological deficits, suffering from visual and auditory hallucinosis caused by a meningioma of the lesser sphenoidal wing, is described. The authors discuss the etiology of the hallucinosis that in the reported case is caused by an impairment of the deep temporal structures.
We investigated the effect of word sur-prisal on the EEG signal during sentence reading. On each word of 205 experimental sentences, surprisal was estimated by three types of language model: Markov models, probabilistic phrase-structure grammars, and recurrent neu-ral networks. Four event-related potential components were extracted from the EEG of 24(More)
Dedicated multisensory mechanisms in the brain represent peripersonal space (PPS), a limited portion of space immediately surrounding the body. Previous studies have illustrated the malleability of PPS representation through hand-object interaction, showing that tool use extends the limits of the hand-centered PPS. In the present study we investigated the(More)
It is generally assumed that solid hydrogen will transform into a metallic alkali-like crystal at sufficiently high pressure. However, some theoretical models have also suggested that compressed hydrogen may form an unusual two-component (protons and electrons) metallic fluid at low temperature, or possibly even a zero-temperature liquid ground state. The(More)
The purpose of this study was to investigate the influence of the pedunculopontine nucleus (PPN) on the electrical activity of entopeduncular nucleus (EP) in the rat and to analyze the influence of the subthalamic nucleus (STN) on the PPN-evoked responses of EP cells. Most of the EP neurons recorded (65.1%) were identified electrophysiologically as output(More)
Effective cognitive functioning not only relies on brain activity elicited by an event, but also on activity that precedes it. This has been demonstrated in a number of cognitive domains, including memory. Here, we show that brain activity that precedes the effective encoding of a word into long-term memory depends on the availability of sufficient(More)