BusbarTrunking System is a prefabricated electrical distribution system consisting of busbars in a
protective enclosure, including straight lengths, fittings, devices and accessories.
Keywords: – Busbar Trunking System, Wires, Modular Devices (MCB, ELCB, ELMCB, DB), HVAC control, Access control, Energy Monitoring System, Tap-off Unit.
SONOS type memories have many advantages of lower operating voltages, excellent endurance and compatibility with standard metal oxide semiconductor (CMOS) technology. However, data retention and operating speed are limitations in such kind of memories. This paper reviews the evolution comes in the basic architecture of non-volatile memory devices like MNOS,SNOS and SONOS with the purpose of using high k-dielectric material in each layer like tunneling layer, charge-trapping layer and blocking layer. Additionally, here we discuss different dielectric materials (HfO2 or Al2O3/oxy-nitride gate dielectrics) and their properties like bias-temperature instabilities, radiation response and annealing characteristics used in such kind of non-volatile semiconductor memories. This will help to understand the contributions of oxide, interface and border-trap charges in charge buildup. This literature survey can provide insight into the fundamental charge trapping properties of high-k dielectrics and help to predict the long-term radiation response and reliability of these devices.
Key Terms: - Al2O3, HfO2, High-k, MNOS, SNOS, SONOS.
[1] D. Khang and S.M. Sze, "A floating gate and its application to memory devices," Bell Sys.Tech.j.,vol. 46,p .1288,1967.
[2] H.A.R. Wegener, A.J. Lincoln, H.C. Pao, M.R. O. Connel and R.E. Oleksia ,"The variable threshold transistor, a new electrically alterable, non-destructive read-only storage device," IEDM Tech. Dig.,Washington,D.C.,1967.
[3] J.R. Cricchi, F.C. Blaha, and M.D. Fitzpatrick, "The drain-source protected MNOS memory device and memory endurance," IEEE IEDM Tech.Dig.,p.126, 1973.
[4] Y. Yatsuda, T. Hagiwara, S. Minami, R. Kondo, K. Uchida, and K. Uchiumi, "Scaling down MNOS nonvolatile memory devices," Jap.J.Appl.Phys. vol.21,S21-1, p.85, 1982.
[5] T. Hagiwara, Y. Yatsuda, S. Minami, S. Naketani, K. Ushida, and T. Yasui, "A 5V only 64k MNOS memory device for highly integrated byte erasable 5V only EEPROMs," IEEE IEDM Tech. Dig., p.733, 1982
3D two adjacent buildings with different heights founded in different kinds of soil connected with viscous dampers, with especial arrangement in plane, were investigated. The soil for three different kinds of soil (stiff, medium and soft) were model as 3D Winkler model to give the realistic behavior of adjacent building connected with viscous dampers. The investigation is carried out to study the structural responses of two adjacent buildings connected with viscous dampers under various earthquake excitations taking in the account the effect of different kinds of soil beneath the buildings. The introduction of soil-structure interaction requires a mathematical model for the foundation and surrounding soil, use SAP2000n to model the system. A range of soil properties and soil damping characteristics are chosen which gives broad picture of connected structure system behavior on influence of soil-structure interaction. Its conclusion that the response of connected structures system founded on soft soil are more critical than those founded on stiff soil. The behavior of connected structures is different from those with fixed base bigger by nearly 20%, and the efficiency of viscous dampers connecting the two adjacent buildings is reduced by nearly 25% less than those founded on stiff soil.
Key words: - 3D analysis – Adjacent buildings – Viscous damper – Couple buildings – SSI – Connecting adjacent building with viscous damper – optimum number of dampers.
Microbial corrosion of Corten steel and Carbon steel in oily waste water is investigated in three different PH. Used culture is provided from natural oily waste water and Nutrient Broth culture. Then bacterium is inoculated to culture and electrochemical analyze is done after two weeks. Results show that biofilm doesn't form completely in acidic media, so in these media, medium affect steel directly. In addition, Corten steel has different behavior against bacteria in comparison with Carbon steel because of having Cu in its composition.
Keywords: - Microbial Corrosion, Pseudomonas Aeruginosa, Corten steel, Carbon Steel, Stainless steel
The elevated cylindrical storage silos are lifeline structures and strategically very important, since they have vital use in industries. Silos are special structures subjected to many different unconventional loading conditions, which result in unusual failure modes. In addition silos are cantilever structures with the material stacked up very high vertically. The earthquake response of silo structures for the storage of bulk solids differs for elevated silos and silos supported directly on the ground. The walls of different type of silos are subject to earthquake loads from the stored mass, and these may substantially exceed the pressures from filling and discharge. The assessment of horizontal action of ensiled material due to seismic vent seems to be particular interest. This paper is concerned with the earthquake response of these structures, which has received little attention to date. A cylindrical silo wall and bulk solid is modeled by three dimensional finite solid l elements. The interaction effect between the silo wall and bulk solid is taking account by using the nonlinear approach proposed by Duncan and Chang. A then interface layer proposed by Desia is applied to describe the phenomena taking place on the surface between the granular material and silo wall. Coulomb's friction low was used for modeling of wall friction. An incremental iterative finite element technique is applied for dynamic analysis of wheat silos using SAP2000 structural software package. In this research seven reinforced concrete silo models with different height to diameter ratios were studied and analyzed in time history by using earthquake acceleration 0.5g applied to silos models. The resulting finite element silo pressures as the silo is full with and without earthquake excitation are compared with theoretical filling and discharging pressure. The result obtained revealed that the elevated silos response is highly influenced by the earthquake characteristics and is depending on the height to diameter ratio. Also the findings indicate that the squat silo (large diameter and height) are more resistance to the earthquake and more economical. The seismic responses of the elevated wheat silo such as top displacement, normal forces, shearing forces and bending moments in silo support have been assessed for earthquake records.
Keywords: - seismic behaviour,bulk and granular solids,time history analysis,filling,discharging,wheat silos
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