Cognitive flexibility, the ability to flexibly switch between tasks, is a core dimension of executive functions (EFs) allowing to control actions and to adapt flexibly to changing environments. It supports the management of multiple tasks, the development of novel, adaptive behavior and is associated with various life outcomes. Cognitive flexibility develops rapidly in preschool and continuousl...

Many studies have shown the beneficial effect of positive emotions on various cognitive processes, such as creativity and cognitive flexibility. Cheerfulness, understood as an affective predisposition to sense of humor, has been associated with positive emotions. So far, however, no studies have shown the relevance of this dimension in cognitive flexibility processes. The aim of this research w...

With the access on demand the mobile device manages the handovers and might not need to have a service contract for connecting to a network. These features may improve or worsen the user access experience and cause some impacts related to, for instance, the received throughput, paid price and number of handovers. This paper presents the performance evaluation results of an access on demand envi...

Wi-Fi (also known as IEEE 802.11b) has proved to be a viable technology for wireless local area networking applications in both business and home environments. There has been a significant growth in Wi-Fi networking in recent years, both in applications and as the subject of academic research papers, articles in the IT press and research house reports. How much of this material, predominantly b...

One of the hallmarks of human cognition is cognitive flexibility, the ability to adapt thoughts and behaviors according to changing task demands. Previous research has suggested that the number of different exemplars that must be processed within a task (the set size) can influence an individual's ability to switch flexibly between different tasks. This paper provides evidence that when tasks h...

Executive function (EF) refers to a set of higher order cognitive processes that control and modulate cognition under continuously changing and multiple task demands. EF plays a central role in early childhood, is associated and predictive of important cognitive achievements and has been recognized as a significant aspect of school readiness. This study examines the efficacy of a group based in...

E-mail: [email protected] With polarization in Congress persistent, with staggering issues and international threats facing the nation, and with fi scal stress an enduring fact of life, presidents have for decades turned to the tools of the administrative presidency to advance and implement their policy agendas. As the Barack Obama administration completed its fi rst six months in offi ce ami...

This paper proposes an index called net load carrying capability (NLCC) to evaluate the contribution of a generating unit to the flexibility of a power system. NLCC is defined as the amount by which the load can be increased when a generating unit is added to the system, while still maintaining the flexibility of the system. This index is based on the flexibility index termed ramping capability...

In the wake of increasing population and rising average per caput consumption of food fi sh and a plateauing off of the traditional food fi sh supplies there is an urgent need to close the increasing gap between supply and demand. It is generally acknowledged that aquaculture would increasingly contribute to closing this gap. Aquaculture production is still and likely to continue to be dominate...

Tyrosine (TYR), an amino acid found in various foods, has been shown to increase dopamine (DA) levels in the brain. Recent studies have provided evidence that TYR supplementation can improve facets of cognitive control in situations with high cognitive demands. Here we investigated whether TYR promotes cognitive flexibility, a cognitive-control function that is assumed to be modulated by DA. We...