Starting Over

Starting Over: The Search for Endogenous NKT Cell Ligands

Like a circus performer in a highwire act, the human immune system teeters on a precarious perch. It must continually balance an effective defense against microbial invaders with the need to avoid the kind of inappropriate immune activity that leads to autoimmune disease. The consequences of a misstep can be disastrous. Natural killer T (NKT) cells, a specialized type of T cell, constitute one ...

Starting School

The head mistress of a Secondary Modern School for girls had the good idea of organising a school party each year at the end of the summer term, the guests to be the pupils about to move up to ^e Senior school and the leavers to act as hostesses. It is difficult to tell which group derives the greater benefit, the 15-year-olds proudly showing the "little ones" around and enjoying their own uttp...

Starting Over: International Adoption as a Natural Experiment in Language Acquisition

Language development is characterized by predictable shifts in the words that children learn and the complexity of their utterances. Because language acquisition typically occurs simultaneously with cognitive development and maturation, it is difficult to determine the causes of these shifts. We explored how acquisition precedes in the absence of possible cognitive or maturational roadblocks, b...

Resume and Starting-Over-Again Retransmission Strategies in Cognitive Radio Networks

Cognitive radio has emerged as a promising technology to realize dynamic spectrum access and increase the efficiency of a largely under utilized spectrum (Haykin, 2005). In a cognitive radio network, a cognitive or secondary user (SU) opportunistically makes use of temporary vacant licensed frequency bands (channels) to set up communication links with other devices. The SUs are capable of detec...

Starting over: Leaving the violence in Iraq for a Penn dental medicine education.