Age differences in 2 components of task-set switching speed were investigated in 118 adults aged 20 to 80 years using task-set homogeneous (e.g., AAAA ...) and task-set heterogeneous (e.g., AABBAABB ... ) blocks. General switch costs were defined as latency differences between heterogeneous and homogeneous blocks. whereas specific switch costs were defined as differences between switch and nons...

During World IPv6 Day on June 8, 2011, several key content providers enabled their networks to offer both IPv4 and IPv6 services. Hundreds of organizations participated in this effort, and in the months and weeks leading up to the event worked hard on preparing their networks to support this event. The event was largely unnoticed by the general public, which is a good thing since it means that ...

A mild hemolytic anemia in a 43-yr-old black likely explanation of the instability is the woman was attributed to the presence of an abpresence of an uncovered positive chargs in the normal hemoglobin (Hb Rush) which migrated central cavity where normally glutamic acid in cathodically to Hb A at pH 8.0. Its structural position 101 neutralizes arginine in position abnormality was found to be in ...

Numeration Systems Definition An abstract numeration system is a triple S = (L,Σ, <) where L is a regular language over a totally ordered alphabet (Σ, <). Enumerating the words of L with respect to the genealogical ordering induced by < gives a one-to-one correspondence repS : N → L valS = rep −1 S : L → N. Example L = a∗, Σ = {a} n 0 1 2 3 4 · · · rep (n) ε a aa aaa aaaa · · · Abstract Numerat...

Three pigeons were trained in a successive same/different (S/D) procedure using compound auditory stimuli (pitch/timbre combinations). Using a go/no-go procedure, pigeons successfully learned to discriminate between sequences of either all same (AAAA...or BBBB...) or all different (ABCD...) sequences consisting of 12 sounds. Both pitch and timbre were subsequently established as controlling dim...

Over just a six-year period from 2005-2011, five aid effectiveness initiatives were launched: the Paris Declaration on Aid Effectiveness (2005), the International Health Partnership plus (2007), the Accra Agenda for Action (2008), the Busan Partnership for Effective Cooperation (2011), and the Global Partnership for Effective Development Cooperation (GPEDC) (2011). More recently, in 2015, the A...

There is demand for early-flowering cannabis ( Cannabis sativa ) cultivars to hasten harvest and avoid late-season detrimental weather conditions. A field study greenhouse studies were conducted evaluate the effect of gene dosage at autoflowering locus on flowering timing diploid triploid hybrids between photoperiod-sensitive parents. Autoflowering × all photoperiod sensitive, but their critica...

hydrogen bonding is considered by many to be the ‘master key’ of molecular recognition — owing to its relatively predictable strength and directionality — and plays a major role in the assembly of diverse non-covalent assemblies1. Consequently, the study and exploitation of hydrogen bonds has been central to the development of modern supramolecular chemistry. In particular, numerous applied set...

This study focuses on the molecular level interpretation of the selective gas-phase cleavage at aspartic acid residues (Asp) in protonated peptides. A phi3P+CH2C(=O)group (phi = 2,4,6-trimethoxyphenyl) is attached to the N-terminal nitrogen of the selected peptides LDIFSDF and LDIFSDFR, via solid-phase synthesis, to "mimic" the tightly held charge of a protonated arginine (Arg) residue. Collisi...