Abstract:Earthquake is among the most dangerous natural events that must be considered in the design of any multi-storey building structure. In order to account for the energy dissipation capacity of the frame and keep it in the elastic domain, most seismic codes adopt design procedures based on the elastic spectrum corrected using the behaviour factor (BF). To make any frame more resistant to earthquakes, many technologies are developed so that seismic damping devices are widely used in building frames. The effect of these devices on the BF value is still insufficiently studied. This paper investigates the influence of fluid viscous dampers (FVDs) on the BF and its components of reinforced concrete moment resisting frames buildings (RC-frames). Three RC-frames of 5, 8 and 12 stories were designed based on the provisions of the European codes (EC2 and EC8), for a high seismic risk area. Under a combination of the effect of the location of the FVDs and number of stories of the considered RC-frames, the results are collected in terms of capacity curves, failure mechanisms and distributions of plastic hinges, and values of BF and its components. The non-linear static analysis (pushover) shows clearly that the contribution of the FVDs, installed in the edge bays, is very significant in improving the seismic response of RC-frames, compared to conventional RC-frames without FVDs, through an increase in the value of the BF from 38% to 66% and from 9.52% to 28% compared to those with FVDs are installed in the central bay.
Abstract:The objective of this research is the valorization of calcined sediment from the Fergoug dam (western Algeria) in sustainable concrete production exposed to different level temperatures. For this purpose, the combination of calcined sediment and steel fiber in concrete is to contribute to economical formulations and has a significant impact on the mechanical performance. Moreover, after calcination at 750 �C calcined sediment was used as a replacement for the cement with different levels of 0%, 8% and 12% by cement weight and steel fiber dosages of 0%, 0.5%, and 1% by concrete volume were investigated on compressive strength at the age of 28 days with different temperature 20 �C, 400 �C, 500 �C and 800 �C in the furnace. The experimental result indicates that the combination of calcined sediment and fibre significantly improves properties of concrete, the optimum dosages of 8% of calcined sediment and 1% of steel fiber could improve compressive strength before and after heating. Beyond 500�C, the mechanical properties decreased rapidly. The inclusion of calcined sediment with or without fiber has shown the positive role in the concrete matrix on the extreme temperatures.
Abstract:Mennonite or Chihuahua cheese (CHC) produced in Durango, Mexico, although considered safe for consumption has not been studied microbiologically; thus, the objective of this work was to evaluate the presence of fecal coliforms (FC) established as hygiene indicators and quantified pathogenic microorganisms such as Escherichia coli, Staphylococcus aureus, and Salmonella spp. as well as molds and yeasts related to the breakdown of food. The presence of lactic acid bacteria (LAB) at the genus level, which provide organoleptic characteristics to the cheese, was also determined. The top 10 brands marketed in the state of Durango were selected, and two batches of each brand were analyzed (n=10). FC and E. coli were found in 70%, S. aureus in 60%, Salmonella spp. in 10%, molds and yeasts in 70% of samples regardless of the milk’s origin. Regarding LAB, genera Lactobacillus sp., Lactococcus sp., Enterococcus sp., Streptococcus sp., and Leuconostoc sp. were found.
Abstract:In this paper, the finite element software ANSYS is employed to analyze the response (moment-curvature and ovalization-curvature relationships) of 6061-T6 aluminum alloy round-hole tubes (6061-RHTs) with different hole diameters (2, 4, 6, 8, and 10 mm) subjected to cyclic bending with different curvature ratios (-1.0, -0.5, 0.0 and +0.5). The curvature ratio is the minimum curvature divides by the maximum curvature. From the experimental results [1], it can be observed that the moment-curvature relationship depicts a stable loop from the first cycle with a curvature ratio of -1.0. However, the moment-curvature relationship gradually drops and becomes stable after a few cycles with curvature ratios of -0.5, 0.0 and +0.5. The hole diameter has little effect on the above behavior. The ovalization-curvature relationship depicts a ratcheting and increasing manner as the number of cycles increases for all curvature ratios. The hole diameter or curvature ratio has a strong influence on the above behavior. In addition, a larger hole diameter or a larger curvature ratio leads to a larger ovalization. Finally, by comparison of the ANSYS simulation and the experimental finding [1], it can be found that the finite element ANSYS can properly simulate the experimental data.
Abstract:Technology has shown capabilities in improving land uses planning. Still, defeating dilemmas of linking information of the Architecture, Engineering, Construction (AEC) with economic, social, and environmental city data in spatial representations. Some countries are aiming to transform from GIS to GeoBIM and recommending in-depth analysis for local industries. The importance of working intertangle within systems shall maximize the benefits for workers within the urban planning and AEC fields by aligning GIS and BIM applications to achieve the best practices established and allow technology adoption. Research aims to find the challenges and potentials of linking GeoBIM applications. Also, to develop a recommendation for land uses management with GeoBIM. Research methodology starts with an intensive literature review of GeoBIM benchmarking and land uses within Jeddah. Then integrate applications within Jeddah GIS and BIM to investigate change readiness. Lastly, analysis for Jeddah via GIS and BIM integrated model shall define the potential and berries of the GeoBIM connecting. Nevertheless, it highlights the spatial and attribute data benefit by covering the locations, data synchronization, interoperability, harmonization as the initial results shows the need to develop each feature to improve data integration.
Abstract:We have developed a novel system of organic spiro-heterocyclic compounds:like diazaspiro-[5.5]undec-8-ene and oxaspiro[bicyclo[2,2,1]heptane-2,1-cyclohexane]dione system with the reaction of Diels-Alder catalyzed with TiCl4 in high regio and stereo-selective way and excellent yield. Initially, we developed different dienophiles and confirmed their structures by spectroscopic methods, 1H NMR, 13C-NMR.then we studied the mechanistic and stereo-chemical action of the various dienophiles concerning the dienes. Finally, the structure of the various newly synthesized products was established by the spectroscopic methods: 1H-NMR, 13C-NMR, the stereochemical aspects of the Diels-Alder reaction, and cycloaddition [4 + 2] were established, and the reaction conditions were mentioned. \n Diazaspiro-[5.5]undec-8-ene Oxaspiro[bicyclo[2, 2, 1]- heptane-2, 1-cyclohexane]dione
Abstract:Abstract. This effort attempts to produce biodiesel from fish frying oil using a novel \"green\" technique based on Fe3O4-CeO2 nanoparticles as a catalyst. XRD analyzed this nanocatalyst\'s stability before and after usage. The best catalyst quantity (per cent by oil weight) and oil-to-methanol ratio for transesterification were explored. The physicochemical parameters of used oil and biodiesel were compared to ASTM D6751 and EN 14214. Catalyst recycling was considered. The biodiesel\'s physicochemical qualities were similar to conventional ones. The nanocatalyst\'s reactivity is sensitive to pretreatment and diminishes in the second cycle. This reduction in reactivity is followed by considerable leaching from the active phase (XRD).
Abstract:This work studies optical absorption in the zinc-blende boron-containing quantum dot (QD) structures. Eight structures are studied; two of them are the ternary BInP/GaP and BInP/BP. The emission wavelengths of the structures cover a broad spectrum range from UV to near-infrared. The structure with BP barriers emit at 292 nm. The ternary structure with GaP barrier emit at 720 nm. The structures with GaP barrier have importance in silicon device technology. The absorption peaks are arranged where the smallest energy difference between the transition subbands correspond to a higher absorption peak and are associated with a wide bandgap energy difference between the barrier and QD.
Abstract:The legislator has organized the public career as an important element , as it runs the work of public utilities that aim to serve the public who receives services from the state . The Public Officer “ Public Servant of Employee hereinafter “ is the only means for the state to perform its role and provide the required services . The Public Officer shall have a full opportunity to be able to defend his conducts and refute what is imputed to him . Disciplinary guarantees must be available to ensure the just and fair penalty of the charged or violating employee . In the event that a disciplinary penalty is imposed on the Public Officer , the legislation endeavors to ensure that all guarantees aim at revealing the truth , and achieving justice that enables the violating officer to defend himself , and to enable him / her to prove his / her innocence . Everyone charged with a penal violation has the right to be presumed innocent until proved guilty according to law in a public trial at which he has had all the guarantees necessary for his defense . It is supposed that a fair trial shall be provided to the accused Public Officer . Several basic conditions are necessary for the judge to make a correct judgment . Otherwise , his judgment will be dismissed and an appeal may be conducted against the judicial misconduct . There shall be a separation of charging and prosecutorial power
Abstract:This project was formulated to develop a system, with the purpose of improving the quality of life of deaf people with functional diversity, allowing them to listen and speak through an assisted communication system. As methodology, the research is quantitative of an applied experimental type, considering that the work is carried out to produce new developments, from a necessity of people with hearing, motor and speech diversity. The result is projected as a communication channel, which matches a software development with a device running iOS or Android operating systems. First, Morse code information is processed. Then, it is translated into text or voice commands allowing users to communicate their ideas or learning an alternate form of communication. Moreover, it will be an option to strengthen the inclusive infrastructure to ensure quality in the participatory teaching process, to enable Education Institutions to meet legal requirements. The achievement of the result is expected to reach top 7 levels of technological maturity on the innovation scale. Finally, the relevance of this project focuses on the possibility of offering an option to improve the quality of life of people with functional diversity, through technology.