A theoretical construction of wormhole supported by Phantom Energy

A new solution has been presented for the spherically symmetric space time describing wormholes with Phantom Energy. The model suggests that the existence of wormhole is supported by arbitrarily small quantity of Phantom Energy.Comment: 6 pages, One reference has been correcte

Viskosimeter Digital Menggunakan Water Flow Sensor G1/2 Berbasis Mikrokontroller 8535

Designing digital viscosimeter using water flow sensor application G1/2 ATMega853 AVR microcontroller based useful for measuring the viscosity of the fluid in a practical value. The core of this tool is used the sensor water flow sensor G1/2 which is a type of flow sensor, which when energized by the fluid can be determined rotations per second (rps). Sensor works on a certain viscosity which the more viscous fluid will flow the smaller the value generated rps. Measurement capability of this tool is in the range of 8-22 rps or on the viscosity range from 0.8340 - 42.3878 cP. Data of sensor processing used a microcontroller ATMega 8535 chip and language used is a C language program while the data processing system using Lagrange interpolation

Chaplygin electron gas model

We provide a new electromagnetic mass model admitting Chaplygin gas equation of state. We investigate three specializations, the first characterized by a vanishing effective pressure, the second provided with a constant effective density and the third is described by a constant effective pressure. For these specializations two particular cases are discussed. In addition, for specialization I, case I we found isotropic coordinate as well as Kretschmann scalar, and for specialization III, case II two special scenarios have been studied.Comment: LaTex, some typos correcte

Thin shell wormhole due to dyadosphere of a charged black hole

To explain Gamma Ray Bursts, Ruffini argued that the event horizon of a charged black hole is surrounded by a special region called, the Dyadosphere where electric field exceeds the critical value for $e^+$ $e^-$ pair production. In the present work, we construct a thin shell wormhole by performing a thought surgery between two dadospheres. Several physical properties of this thin shell wormhole have been analyzed.Comment: 10 pages, 2 figures. Accepted in Mod.Phys.Lett.