Reconstructions of the early thermal history of the H-chondrite parent body have focused on two competing hypotheses. The first posits an undisturbed thermal evolution in which the degree of metamorphism increases with depth, yielding an “onion-shell” structure. The second posits an early fragmentation–reassembly event that interrupted this orderly cooling process. Here, we test these hypothese...

The problems of reprocessing and long-term storage spent nuclear fuel (SNF) at power plants with RBMK reactors have not been fully resolved so far. For this reason, are forced to search for new options the disposal fuel, which can provide least temporary SNF storage. One possible solutions problem is switch compacted in reactor pools (SFPs). As number assemblies (SFAs) SFPs increases, a greater...

We have observed the quasi-persistent neutron-star X-ray transient and eclipsing binary MXB 1659– 29 in quiescence on three occasions with Chandra. The purpose of our observations was to monitor the quiescent behavior of the source after its last prolonged (∼2.5 years) outburst which ended in September 2001. The X-ray spectra of the source are consistent with thermal radiation from the neutron-...

Carp respond to cold by the up-regulated expression of ∆9-acyl CoA desaturase. Here we report the cloning and characterisation of Cds2, a second ∆9-acyl CoA desaturase expressed in carp liver. Both Cds1 and Cds2 complemented the ole1 mutation in Saccharomyces cerevisiae, permitting the synthesis of ∆9 monounsaturates, confirming their identity as ∆9-desaturases. We demonstrate that under a stan...

Management of computing infrastructure in data centers is an important and challenging problem, that needs to: i) ensure availability of services conforming to the Service Level Agreements (SLAs); and ii) reduce the Power Usage Efficiency (PUE), i.e. the ratio of total power, up to half of which is attributed to data center cooling, over the computing power to service the workloads. The cooling...

in a steam power plant, the temperature of the cooling water leaving the condenser for recyclingshould decrease. this is achieved in a cooling tower. the heller cooling tower does not require waterfor operation, thus, it is a suitable system for use in thermal power plants throughout iran. wind is anenvironmental factor that unfavorably affects the performance of a cooling tower. previous studi...

Polley, S. D., P. E. Tiku, R. T. Trueman, M. X. Caddick, I. Y. Morozov, and A. R. Cossins. Differential expression of coldand diet-specific genes encoding two carp liver 9-acyl-CoA desaturase isoforms. Am J Physiol Regul Integr Comp Physiol 284: R41–R50, 2003. First published September 12, 2002; 10.1152/ajpregu.00263.2002.—Carp respond to cold by the upregulated expression of 9-acyl-CoA desatur...

We study the feedback between heating and cooling of the intra-cluster medium (ICM) in cooling flow (CF) galaxies and clusters. We adopt the popular view that the heating is due to an active galactic nucleus (AGN), i.e. a central black hole accreting mass and launching jets and/or winds. We propose that the feedback occurs with the entire cool inner region (r . 5 − 30 kpc), where the non-linear...