We present results from VLBA+Effelsberg 1.7 GHz, VLBA 8.4 GHz and VLBA 15 GHz observations of the JVAS gravitational lens system B1030+074. The VLBA+Effelsberg 1.7 GHz data with 3 mas resolution reveal a detailed 60 mas jet structure in the strong A component of the lens system and maybe a first hint of the corresponding jet structure in the faint component B. As we go to the higher resolution ...

We present an overview of all the observations (radio-VLA, MERLIN, VLBA, EVN-and optical-WFPC2 and NICMOS-) that were initially used to confirm the gravitational lens nature of the double JVAS system B1030+074. Since the 1.56 arcsec system showed some first indication of variability it has been monitored with the VLA and MERLIN to confirm its variable nature. We also present new VLBA observatio...

Cooling down time measurements carried out at LEAR with 4.2 MeV/nucleon Pb ions and various combinations of lattice functions led to unexpected results. Notably, a finite dispersion was found to decrease strongly the horizontal cooling down times. Furthermore, intermediate betatron functions yielded shorter cooling down times than large ones and an increase of the cooler length by a factor 2 di...

The ratio of male to female sex among infants born to 391 women with and 114 079 without placenta praevia was analysed by parity. In the women without placenta praevia the sex ratio decreased significantly with increasing parity, whereas in the women with placenta praevia it increased. Overall, the sex ratio was increased among the women with placenta praevia, particularly multiparas. An increa...

074 0 -74 5 9 /12 / $ 31. 0 0 © 2 012 I E E E Steve McConnell deSCribed technical debt as including both intentional and unintentional violations of good architectural and coding practice1—an expansion of Ward Cunningham’s original focus on intentional decisions to release suboptimal code to achieve objectives such as faster delivery.2 By choosing debt as a metaphor, Cunningham engaged a set of...

Tao Peng 1, Peng Yang 1 , Hanbing Dan 1,* , Hui Wang 1, Hua Han 1, Jian Yang 1, Hao Wang 1, Hui Dong 1 and Patrick Wheeler 2 1 School of Information Science and Engineering, Central South University, Changsha 410083, China; [email protected] (T.P.); [email protected] (P.Y.); [email protected] (H.W.); [email protected] (H.H.); [email protected] (J.Y.); [email protected] (...

Abstract The full-heavy tetraquarks $$cc{\bar{c}}{\bar{b}}$$ c ¯ b and $$bb{\bar{b}}{\bar{c}}$$ are systematically investigated within a quark model. meson–meson structure, diquark–antidiquark structure K-structure considered in...