Rock burst is one of the most serious dynamic disasters in process coal resources mining, order to study its occurrence mechanism and characteristics impact on roadways. Based No. 25110 working face Yuejin Mine Yi Coal 21032 return air uphill event Qianqiu Mine, combined with geological conditions, shock location, source waveform, this paper uses numerical simulation inverse response roadway su...

Abstract Since 2020 April 28, Insight-HXMT has implemented a dedicated observation on the magnetar SGR J1935+2154. Thanks to wide energy band (1–250 keV) and high sensitivity of Insight-HXMT, we obtained 75 bursts from J1935+2154 during month-long activity episode after emission FRB 200428. Here report detailed time-integrated spectral analysis these statistical distribution parameters. We find...

We study the statistics of soft gamma repeater (SGR) bursts using a database of 187 events detected with BATSE and 837 events detected with the Rossi X-Ray Timing Explorer Proportional Counter Array; all events are from SGR 1900114 during its 1998–1999 active phase. We find that the fluence or energy distribution of bursts is consistent with a power law of index 1.66, over 4 orders of magnitude...

We study the statistics of soft gamma repeater (SGR) bursts using a database of 187 events detected with BATSE and 837 events detected with the Rossi X-Ray Timing Explorer Proportional Counter Array; all events are from SGR 1900+14 during its 1998-1999 active phase. We find that the fluence or energy distribution of bursts is consistent with a power law of index 1.66, over 4 orders of magnitude...

BACKGROUND AND OBJECTIVES Laparoscopic sleeve gastrectomy is a technically simple and popular bariatric operation with acceptable results. However, leaks can occur in long staple lines, for which various reinforcement methods are used. We compared nonreinforced stapling in laparoscopic sleeve gastrectomy with 3 staple line reinforcement methods: suturing, absorbable buttressing material, and fi...

GCRT J1745−3009 is a transient bursting radio source located in the direction of the Galactic center. It was discovered in a 330 MHz VLA observation from 2002 September 30–October 1 and subsequently rediscovered in a 330 MHz GMRT observation from 2003 September 28 by Hyman et al. Here we report a new radio detection of the source in 330 MHz GMRT data taken on 2004 March 20. The observed propert...

With the development of economic construction, underground space development continues to move towards the deep. "More, long, big, deep," will be the general trend of the development of underground engineering in the 21st century. Rock burst is a kind of sudden geological disasters with a higher frequency in deep tunnel construction. Rock burst prediction has very important significance for the...

the date of receipt and acceptance should be inserted later Abstract. We report on XMM-Newton and Rossi-XTE observations of the bright (fluence ∼ 10 −4 erg cm −2) and nearby (z=0.1685) Gamma-Ray Burst GRB030329 associated to SN2003dh. The first Rossi-XTE observation, 5 hours after the burst, shows a flux decreasing with time as a power law with index 0.9±0.3. Such a decay law is only marginally...

On January 6 th 2004, the IBAS burst alert system triggered the 8 th gamma–ray burst (GRB) to be located by the INTEGRAL satellite. The position was determined and publicly distributed within 12 s, prompting ESA's XMM–Newton to execute a ToO observation just 5 hours later, during which an X–ray afterglow was detected. The GRB had a duration ∼ 52 s with two distinct pulses separated by ∼ 42 s. H...

We present results from the on-going spectral analysis of gamma-ray bursts measured by the COMPTEL instrument in its main Compton \Telescope" observing mode (0.75{30 MeV). Thus far, 18 bursts have been analyzed from three years (April 1991 { April 1994) of observations. The time-averaged spectra of these events above 1 MeV are all consistent with a simple power law model with spectral index in ...