In order to get, at the ultrasonic receiver input, a clear echo pulse, it is very important to apply on the transducer a short high amplitude pulse (hundreds of volts). The pulse frequency is low enough to allow the reception and processing of the informations received from the analysed material between two adjacent pulses, but high enough to ensure an integral control of the material. The piez...

The mechanical properties of polymer impregnated concrete containing polypropylene fiber were statistically and experimentally examined in this study. Taguchi L9 (33) was used variables for experiments selected as the ratio (0%, 1% 2%), cement dosage (300, 350 400 kg/m3) curing time (7, 14 28 days). After specimens cured at specified times, they dried 105 ±5 °C. Then, monomer to 24 hours under ...

The knowledge of the thermal shock resistance of refractory materials is of outmost importance since it determines their performance in many applications, from ceramic manufacturing to oil refinery, thermal insulation, nuclear power, chemical and petrochemical industries. Thermal shock resistance is measured in terms of the number of cycles that a refractory material can withstand when subjecte...

UPV as non-destructive technique can effectively contribute to the low invasive in situ analysis and diagnosis of masonry elements related to the conservation, rehabilitation and strengthening of the built heritage. The use of non-destructive and non-invasive techniques brings all the times many advantages in diagnostic activities on pre-existing buildings in terms of sustainability; moreover, ...

The development of Tissue Engineered Vessels (TEVs) is advanced by the ability to routinely and effectively implant TEVs (4-5 mm in diameter) into a large animal model. A step by-step protocol for inter-positional placement of the TEV and real-time digital assessment of the TEV and native carotid arteries is described here. In vivo monitoring is made possible by the implantation of flow probes,...

Jembatan Loa Haur merupakan sebuah jembatan tipe rangka baja dengan bentang 60 meter dibangun pada tahun 1992 yang terletak Jalan Poros Samarinda – Tenggarong, Desa Bakungan, Kecamatan Janan Kutai Kartanegara Kalimantan Timur. Akibat kondisi lalu lintas dan beban kendaraan melintas semakin meningkat di Haur, untuk keamanan kenyamanan pengguna, perlukan evaluasi struktur jembatannya. Salah satu ...