Weak Task Synchronization of Default Mode Network in Task Based Paradigms

Default Mode Network (DMN) has been called a "task-negative" network which deactivates during engaging extrinsic tasks. But the behavior is more nuanced. We analyse the DMN during three different tasks (visual, affect and language; n=54) and find inter trial variability which gets amiss when analysed using General Linear Model (GLM). The region also shows significant across subjects variations which limits the use of Inter Subject Correlation (ISC) method to detect correlated deactivations during the task. We introduce Temporal Synchronization Analysis (TSA), a family of methods that can help detect inter-trial (IT-TSA) and inter-subject (IS-TSA) synchronization across the brain. We find that DMN is weakly synchronized across trials and subjects, challenging the notion of task negative behavior. Our study suggests the role of DMN as an active component associated with self-referential, autobiographical processes which are deactivated differentially and non linearly across trials and subjects in the presence of extrinsic processes.

Declarative programming of TV applications using NCL

NCL is the declarative programming language used to develop TV applications in IPTV systems and Terrestrial TV standardized by ITU and Brazilian TV Forum, respectively. Its main characteristics are: defining temporal synchronization among media assets and viewer interactions; layout reuse facilities; support multi-device presentation; support embed HTML code and scripts in the lightweight scripting language Lua; and an API for life-cycle controls (start, pause, resume, stop) and modifying applications on-the-fly called NCL editing command. This talk briefly introduces NCL, highlights its recent advances, and discuss the future of the language.

Implication of а Perception Situation by Present Continuous Tense

It is necessary to imply the unity of the temporal and spatial segments of the perceived situation and perception situation, only in this case can we assume its observability. Present Continuous expresses the relevance of the temporal segment on the time axis. It expresses the action which is actual and relevant to speech moment. Present Continuous is able to imply a perception situation provided the time and place unity. If there is a spatial disunity of the speaker / observer and the participants of the other situation, their mutual observability is excluded. If the condition of spatial unity is not observed, only the value of temporal synchronization is realized. It turns out that the autonomous use of Present Continuous does not always imply a situation of perception. The crucial role belongs to the context. If the speaker and participants of another simultaneous situation are separated spatially, they can’t observe each other.