Particle concentration measurement and flow regime identification in multiphase pipe flow using a generalised dual-frequency inversion method

An acoustic particle concentration measurement method, originally developed for marine sediment, in which the backscattered energy received by emitter-receiver transducers in the megahertz range is used to construct concentration profiles in suspensions of solid particles in a carrier fluid is applied to suspensions of general engineering interest. Four particle species with range of densities and sizes are used. Concentration profiles in horizontal, turbulent pipe flow at a Reynolds number of 50,000 and three nominal volume fractions are presented for each particle species, using experimentally determined acoustic coefficients, in order to isolate the influence of particle size and density on transport and settling in solid-liquid multiphase flows. It is clear from the results that the method allows the degree of segregation in real suspensions and slurries to be measured, and has a range of potential applications in the nuclear and minerals processing industries, for example. Lastly, the limiting conditions of the method are explored through the concept of an acoustic penetration depth

ANALISIS PERBEDAAN INFORMASI DIAGNOSTIK ANTARA SEKUENS T1 FAST SPIN ECHO DENGAN dan TANPA FAT SATURASI PADA MRI PELVIS POST MEDIA KONTRAS DENGAN KASUS KANKER SERVIKS

Background : Has been done Research on the difference of diagnostic information between T1 Fast Spin Echo sequences with and without Fat Saturation on MRI pelvis post contrast media at the Radiology Hospita Soetomo surabaya. This study aims to determine whether there is a difference in image information between T1 FSE sequences with and without Fat Saturation, then know the best sequence between T1 FSE and T1 FSE Fat Saturation on MRI pelvis examination with cases cancer servix.Method : The type of research used is quantitative research with experimental approach done in Radiology Installation Hospital Dr. Soetomo Surabaya. Data were collected by examining MRI Pelvis with cervix cancer cases in 10 patients. Then scanned with T1 sequence FSE post contrast and T1 sequence FSE Fat Saturation on sagital slices. Presented to 3 radiologist for assessment. After the image is assessed by the three respondents, the assessment results are summarized and then tested using SPSS with Wilcoxon test.Result : Based on data analysis with Wilcoxon test, obtained value of significance equal to 0,001 or p valu