In this paper the changes in the heat capacity of cooling towers has been investigated as a result of injecting combustion products of boilers. In the tower, the air is re-heated through mixing with hot flue gas after passing through the heat exchangers. As a result of this process, the draft of the cooling tower is increased. The additional produced draft depends on the ambient temperature and...

Our view of the high velocity cloud (HVC) system is changing dramatically with new observations from the Far Ultraviolet Spectroscopic Explorer mission and the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope. In particular, the detection of Ovi absorption indicates that many HVCs have a hot, collisionally-ionized component in addition to the neutral gas detected in H i 2...

Our view of the high velocity cloud (HVC) system is changing dramatically with new observations from the Far Ultraviolet Spectroscopic Explorer mission and the Space Telescope Imaging Spectrograph on-board the Hubble Space Telescope. In particular, the detection of Ovi absorption indicates that many HVCs have a hot, collisionally-ionized component in addition to the neutral gas detected in H i ...

The X-ray data obtained with XMM-Newton is used to investigate the complex structure of the gas in the atmosphere of the Virgo cluster around M87. We construct a simple model for the temperature and density distribution. This model implies that the cumulative mass of the cluster gas is a power-law of its entropy index, kT n−2/3, similar to the Hydra cluster. This supports the idea that such pow...

We have studied the nuclear activity in a sample of six quiescent early-type galaxies, with new Chandra data and archival HST optical images. Their nuclear sources have X-ray luminosities ∼ 10– 10 erg s (LX/LEdd ∼ 10 –10), and colors or spectra consistent with accreting supermassive black holes (SMBHs)—except for the nucleus of NGC 4486B, which is softer than typical AGN spectra. In a few cases...

WE HEREIN REPORT A PATIENT WITH ACUTE APPENDICITIS WHO WAS DIAGNOSED BY COLONOSCOPY: a 54-year-old woman with normal physical examination and laboratory results within normal limits. The case had shown an erythematous and edematous bulging polypoid lesion with purulent discharging from appendiceal orifice into the cecum. At colonoscopy, appendix appeared as an erythematous and edematous bulging...

Although computed tomographic (CT) myelography and magnetic resonance imaging (MRI) are used for assessing lumbar disc herniations (LDH), they cannot provide images when patients are standing or walking, whose CT myelograms and MRI images show only slight disc bulging. The purpose of this study was to evaluate the usefulness of upright myelography. We examined by myelography in both an upright ...

Based on the conventional sequential-accretion paradigm, we have proposed that, during the migration of first-born gas giants outside the orbits of planetary embryos, super Earth planets will form inside the 2:1 resonance location by sweeping of mean motion resonances (Zhou et al. 2005). In this paper, we study the subsequent evolution of a super Earth (m1) under the effects of tidal dissipatio...

An isolated massive star can blow a bubble, while a group of massive stars can blow superbubbles. In this paper, we examine three intriguing questions regarding bubbles and superbubbles: (1) why don’t we see interstellar bubbles around every O star? (2) how hot are the bubble interiors? and (3) what is going on at the hot/cold gas interface in a bubble?