heat exchangers are one of the most important devices of mechanical systems in modernsociety. most industrial processes involve the transfer of heat and more often they requirethe heat transfer process to be controlled. a heat exchanger is the heat exchanged betweentwo media, one being cold and the other being hot. there are different types of heatexchanger, but the type which is widely used in...

Food processing is costly, potentially limiting the energy and time devoted to other essential functions such as locomotion or reproduction. In ectotherms, post-prandial thermophily, the selection of a warm environmental temperature after feeding, may be advantageous in minimizing the duration of this elevated cost. Although present in many vertebrate taxa, this behaviour had not previously bee...

Since the first experimental realization of Bose-Einstein condensation in cold atomic gases in 1995 there has been a surge of activity in this field. Ingenious experiments have allowed us to probe matter close to zero temperature and reveal some of the fascinating effects quantum mechanics has bestowed on nature. It is a challenge for mathematical physicists to understand these various phenomen...

Cold + Hot Dark Matter (CHDM) = 1 cosmological models require a total neutrino mass 5 eV. Because recent data support the ! oscillation explanation of the cosmic ray deecit, which requires that m() m(), this suggests that m() m() 2:4 eV. The linear calculations and N-body simulation reported here indicate that an = 1 CHDM model with two 2.4 eV neutrinos (designated C 2 DM) agrees remarkably wel...

Every modern high vacuum and ultrahigh vacuum system relies on some form of ionization gauge for pressure measurements under 10 Torr. There are currently two competing ionization gauge technologies to choose from the hot cathode gauge (HCG) and the cold cathode gauge (CCG). This application note is designed to help vacuum users choose between the two competing ionization technologies. Each gaug...

The E814-collaboration has found a component of very low m t K + mesons with a slope parameter of T 15 MeV. We will present a scenario which explains the observed slope parameter and which allows us to predict the expected slope parameter for kaons produced in heavier systems such as Au+Au. Implications for the restoration of chiral symmetry in relativistic heavy ion collisions are discussed.

BACKGROUND The association between temperature and mortality has been examined mainly in North America and Europe. However, less evidence is available in developing countries, especially in Thailand. In this study, we examined the relationship between temperature and mortality in Chiang Mai city, Thailand, during 1999-2008. METHOD A time series model was used to examine the effects of tempera...