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Uniprocessor Computers
Published in Vivek Kale, Parallel Computing Architectures and APIs, 2019
Midrange computers are primarily high-end network servers and other types of servers that can handle the large-scale processing of many business applications. Although not as powerful as mainframe computers, they are less costly to buy, operate, and maintain, and thus meet the computing needs of many organizations. Midrange systems first became popular as minicomputers in scientific research, instrumentation systems, engineering analysis, and industrial process monitoring and control. Minicomputers were able to easily handle such functions because these applications are narrow in scope and do not demand the processing versatility of mainframe systems. Today, midrange systems include servers used in industrial process control and manufacturing plants and play major roles in computer-aided manufacturing (CAM). They can also take the form of powerful technical workstations for computer-aided design (CAD) and other computation and graphics-intensive applications. Midrange systems are also used as front-end servers to assist mainframe computers in telecommunications processing and network management.
Study of the State of Conservation and the Building Materials Used in Defensive Constructions in South-Eastern Spain: The Example of Mula Castle in Murcia
Published in International Journal of Architectural Heritage, 2021
M. L. Gutierrez-Carrillo, Anna Arizzi, I. Bestué Cardiel, E. Sebastián Pardo
The matrix, which has an off-white colour, has an intermediate level of porosity with rounded and sub-rounded pores of varying sizes. The sample has a mid-range aggregate content. The aggregates have a sand grain size (0.06–2 mm), are rounded and subangular in shape, and are of metamorphic and sedimentary origin, as observed under the loop. We also identified lime lumps and ceramic fragments of varying grain size in the matrix (0.06–1 mm). From the mineralogical study by XRD study, the same phases as in sample Mu-M2 were detected: calcite and quartz were identified as main phases and dolomite, feldspars, muscovite, kaolinite and aragonite were identified in minor amounts (Figure 7). The petrographic study (Figure 11) of this sample allowed us to deduce that the matrix of this crust was of a calcitic nature, as had been deduced for the previous samples. The aggregate in this sample is very similar to the previous ones, as it appears formed of clastic components of sedimentary and metamorphic rocks with medium (around 3 mm) and fine (<1 mm, as fine sand and silt) grain sizes. As in the previous samples, quartz (around 12%) and carbonated (63% of calcite and dolomite, both altered) aggregates are present. Porosity is lower than in previous samples, and no shrinkage fissures or biodeterioration were observed. The sample has a natural patina caused by the accumulation of clayey minerals on its surface.
Redesigning of the diesel engine turbocharger compressor wheel to improve the low-cycle fatigue life
Published in International Journal of Ambient Energy, 2019
T. Raja, R. Rajasekar, R. Siva, N. Karthik, R. Kumarasubramanian
For fatigue life analysis, the following type of of turbocharger is selected which fails frequently in field. The selected turbocharger compressor wheel has premature failure in field applications particularly in city driving conditions (Japikse 2010). Failure of the compressor wheel occurs in the vehicle endurance period in between 100,000 km to 1, and 80,000 km.The engine and vehicle details of turbocharger application are listed Compressor wheel: 63 mm (Exducer) × 43 mm (Inducer).Vehicle: mid-range city bus application.Capacity: 35 seats.Engine cylinders: 4 numbers.Engine Power: 88 kW @ 2400 rpm.Torque: 425 N m @ 1400–2000 rpm.
Effect of irradiation on microstructure and hardening of Cr–Fe–Ni–Mn high-entropy alloy and its strengthened version
Published in Philosophical Magazine, 2020
V.N. Voyevodin, S.A. Karpov, G.D. Tolstolutskaya, M.A. Tikhonovsky, A.N. Velikodnyi, I.E. Kopanets, G.N. Tolmachova, A.S. Kalchenko, R.L. Vasilenko, I.V. Kolodiy
Samples of all three materials with dimensions of 10 × 5 × 0.5 mm were irradiated with 1.4 MeV argon ions at room temperature (RT) in a dose range of 0.1–10 dpa. These mid-range doses are evaluated at a depth of ∼0.25 µm. All irradiations were carried out with the accelerating-measuring system ‘ESU-2’ [8], which contain Van de Graaf accelerator. The depth distribution of Ar atoms concentration and damage was calculated by SRIM 2008 [9] and shown in Figure 1. The damage calculations are based on the Kinchin–Pease model (KP), with a displacement energy for each alloying element was set to 40 eV, as recommended in ASTM E521-96 (2009) [10].