Hawking radiation is viewed as a process of quantum tunneling. The massive particles＇ tunneling from Garfinkle-I-Iorowitz-Strominger black hole is investigated. Using Jingyi Zhang＇s de Broglie wave method, we get th...Hawking radiation is viewed as a process of quantum tunneling. The massive particles＇ tunneling from Garfinkle-I-Iorowitz-Strominger black hole is investigated. Using Jingyi Zhang＇s de Broglie wave method, we get the unthermal spectrum, and the result is consistent with the underlying unitary theory.展开更多
Indonesia government in this term Directorate General of Higher Education providing grants for ICT infrastructttres supplied through all bequest competitions. The kinds and amount of the grants are various which can b...Indonesia government in this term Directorate General of Higher Education providing grants for ICT infrastructttres supplied through all bequest competitions. The kinds and amount of the grants are various which can be used to provide hardware to make ICT based teaching materials. The government issued a huge amount of funds, therefore, it must be balanced with an optimal utilization. This research aims to analyze cost efficiency of dual mode web-based learning in Indonesia. The object of this research is four higher educations in Indonesia. The analysis is done by comparing the average cost per student and the average cost per subject among 4 institutions. The result showed that there are institutions that issued higher cost compared with the others in producing the same learning media.展开更多
The possibility of stable or quasi-stable Planck mass black hole remnants as solution to the black hole information paradox is commonly believed phenomenologically unacceptable. Since we need a black hole remnant for ...The possibility of stable or quasi-stable Planck mass black hole remnants as solution to the black hole information paradox is commonly believed phenomenologically unacceptable. Since we need a black hole remnant for every possible initial state, the number of remnants is expected to be infinite and that would lead to remnant pair production in any physical process with a total available energy roughly exceeding the Planck mass. In this note I point out that a positive cosmological constant of the Universe would naturally lead to an upper bound on the number of possible remnants.展开更多
基金The project supported by National Natural Science Foundation of China under Grant Nos. 10373003 and 10475013 and the National Basic Research Program of China under Grant No. 2003CB716302.
文摘Hawking radiation is viewed as a process of quantum tunneling. The massive particles＇ tunneling from Garfinkle-I-Iorowitz-Strominger black hole is investigated. Using Jingyi Zhang＇s de Broglie wave method, we get the unthermal spectrum, and the result is consistent with the underlying unitary theory.
文摘Indonesia government in this term Directorate General of Higher Education providing grants for ICT infrastructttres supplied through all bequest competitions. The kinds and amount of the grants are various which can be used to provide hardware to make ICT based teaching materials. The government issued a huge amount of funds, therefore, it must be balanced with an optimal utilization. This research aims to analyze cost efficiency of dual mode web-based learning in Indonesia. The object of this research is four higher educations in Indonesia. The analysis is done by comparing the average cost per student and the average cost per subject among 4 institutions. The result showed that there are institutions that issued higher cost compared with the others in producing the same learning media.
基金supported in part by NSF under Grant No.PHY-0547794DOE under Grant No.DE-FG02-96ER41005
文摘The possibility of stable or quasi-stable Planck mass black hole remnants as solution to the black hole information paradox is commonly believed phenomenologically unacceptable. Since we need a black hole remnant for every possible initial state, the number of remnants is expected to be infinite and that would lead to remnant pair production in any physical process with a total available energy roughly exceeding the Planck mass. In this note I point out that a positive cosmological constant of the Universe would naturally lead to an upper bound on the number of possible remnants.
