A Remotely Operable Facility for Fabrication of Fuel Pins for test Irradiation

AbstractA laboratory scale facility has been set up for fabrication of test fuel pins through sol-gel route for irradiation in FBTR, Kalpakkam. The facility is a train of glove boxes fitted with master slave manipulators for carrying out various operations involved in the fuel fabricat ion process. The paper describes the design features of the equipment and mechanisms for automation, developed for microsphere production and other processes. The design features include control system and vision systems for man- machine interface

Scintillator ageing of the T2K near detectors from 2010 to 2021

The T2K experiment widely uses plastic scintillator as a target for neutrino interactions and an active medium for the measurement of charged particles produced in neutrino interactions at its near detector complex. Over 10 years of operation the measured light yield recorded by the scintillator based subsystems has been observed to degrade by 0.9–2.2% per year. Extrapolation of the degradation rate through to 2040 indicates the recorded light yield should remain above the lower threshold used by the current reconstruction algorithms for all subsystems. This will allow the near detectors to continue contributing to important physics measurements during the T2K-II and Hyper-Kamiokande eras. Additionally, work to disentangle the degradation of the plastic scintillator and wavelength shifting fibres shows that the reduction in light yield can be attributed to the ageing of the plastic scintillator. The long component of the attenuation length of the wavelength shifting fibres was observed to degrade by 1.3–5.4% per year, while the short component of the attenuation length did not show any conclusive degradation

Client requirement based path selection algorithm for Tor network

In Tor network, the relays run by volunteers are non-uniform in nature, mainly with respect to the bandwidths of the relay. Browsing with Tor is often slow due to the design where the path taken from client to server is not the shortest path but ensures that it is secure in such a way that user's anonymity is maintained. Due to this, speed and anonymity is inversely proportional in the Tor network. Furthermore, since Tor uses circuits with relays in different geographical locations, it makes the connection further protracted. With so many factors affecting the performance, there is a need to improve on the current functionalities and contribute to low latency, anonymous browsing. In this paper, we try to enhance the speed of the client's browsing by segregating the relays based on their derived bandwidth as given in the consensus file and selecting path for clients based on their requirement. We discard some of the relays which are below the 12.5 percentile of all the valid relays while creating circuits for clients with high bandwidth requirement. Based on the simulations that we ran on Shadow Simulator, we have observed that, in our proposed algorithm, we are ensuring that low bandwidth relays are not congested with connection from clients with high bandwidth requirement. This has improved the low bandwidth client speed significantly. In our simulations, we also observe that there is no compromise in anonymity in our proposed algorithm. © 2017 IEEE

Large scale bioinformatics data mining with parallel genetic programming on graphics processing units

Abstract A suitable single instruction multiple data GP interpreter can achieve high (Giga GPop/second) performance on a SIMD GPU graphics card by simultaneously running multiple diverse members of the genetic programming population. SPMD dataflow parallelisation is achieved because the single interpreter treats the different GP programs as data. On a single 128 node parallel nVidia GeForce 8800 GTX GPU, the interpreter can out run a compiled approach, where data parallelisation comes only by running a single program at a time across multiple inputs. The RapidMind GPGPU Linux C++ system has been demonstrated by predicting ten year+ outcome of breast cancer from a dataset containing a million inputs. NCBI GEO GSE3494 contains hundreds of Affymetrix HG-U133A and HG-U133B GeneChip biopsies. Multiple GP runs each with a population of five million programs winnow useful variables from the chaff at more than 500 million GPops per second. Sources available via FTP.