sowing date and irrigation are two constrain factors for maize production. these factors can be simulated by using ceres-maize model. for this purpose two experiments (each one at two years) were carried out at agricultural research station of gorgan which is golestan province capital. the model was calibrated using three treatments of optimum irrigation and without stress in 2012 and two treat...

this study examined the nature and patterns of rice consumption in nigeria, using kwara state as a case study. the study methodology comprised a two stage sampling technique which was used to survey 110 rice consumer households across two villages and six towns in kwara state. analytical tools used in the study include descriptive statistics and the multinomial logit model. the major factors th...

CERES is a dilepton experiment at the CERN SPS, known for its observation of enhanced production of low mass ee pairs in collisions between heavy nuclei [ 1]. The fact that the excess pairs had invariant masses above approximately twice the pion mass and that the enhancement was absent in proton induced collisions [ 2] pointed towards pion annihilation ππ → ρ → ee as the additional source of le...

Recent HBT results from the CERES experiment at the SPS are reviewed. Emphasis is put on the centrality and beam energy dependence, and the results are put into perspective with results at lower and higher beam energies. The rather weak beam energy dependence of the HBT radii may be understood in terms of a transition from baryon to pion dominated freeze-out. The observed short lifetimes and em...

Trends in recent temperature observations and model projections of the future are characterized by greater warming of daily minimum (tmin) relative to maximum (tmax) temperatures. To aid understanding of how tmin and tmax differentially affect crop yields, we analyzed variations of regional spring wheat yields and temperatures for three irrigated sites in western North America that were charact...

Context. Astronomical research dealing with accurate radial velocity measurements need reliable astronomical standards to calibrate the spectrographs and to assess possible systematics. Stellar radial velocity standards offer a reference at the level of a few hundred m s−1 and are not adequate for most present needs. Aims. We aim to show that sunlight reflected by asteroids is a fairly accessib...

During 1999 the CERES experiment upgraded by the new TPC was taking data from semi-central Pb+Au collisions at 40 AGeV. The analysis of the di-electron spectra shows an enhancement in the low mass region of at least the same magnitude as previously observed at full SPS energy. The results are compared to model calculations with and without medium modifications of the vector mesons. The addition...