Many Eyes Are Better Than One Pair

Two Are Better than One?

This paper uses Markov-switching specifications to create a hybrid model with time-varying loading on each of chartist and fundamentalist approaches. The empirical data include the U.S. dollar exchange rates of four Asian tiger countries’ currencies including NTD, SGD, HKD and KOW from 1980 to 2000. Our empirical findings are consistent with the following notions. First, the forecasting perform...

Many Minds are No Worse than One

Many Random Walks Are Faster Than One

This paper is about searching a graph with a random walk. We show that several random walks running (or walking) in parallel can often search a graph much faster than a single random walk on its own. We measure the cover time, which is the expected amount of time required to visit every node in the graph, and we show that for a large collection of interesting graphs running many random walks in...

Eye Evolution: Two Eyes Can Be Better Than One

The development of our eyes is owed in part to ancestral structures which functioned in phototaxis. With the origin of bilateral annelid larva, two eyes co-evolved with neurons to improve phototaxis performance.

When two kinases are better than one

When two kinases are better than one V idal-Eychenié et al. describe how two protein kinases team up to respond to DNA damage at stalled replication forks. DNA-dependent protein kinase catalytic subunit (DNA-PKcs) promotes the repair of DNA double-strand breaks (DSBs) by nonhomologous end joining (NHEJ). The ATR kinase, on the other hand, initiates cell cycle arrest and DNA repair after recogni...