The combination of two converters to a dual floating converter is an interesting concept. Here a positive output double floating boost converter is treated. The concept is explained step by step with the help of signa...
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The methods used for differentiation of potential field data play an important role in interpretation, as various derivatives are included in many of the transformations often used when interpreting such data (e.g., a...
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The increasing global demand for energy, environmental concerns, and the limited availability of energy resources have heightened interest in alternative fuels for internal combustion engines. In this context, interna...
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In this study, the spatial distribution of heavy minerals (HMs) in Miri beach sediments was assessed to quantify the abundance and determine the provenance. Surface sediment samples were collected in Miri beaches duri...
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In this study, the spatial distribution of heavy minerals (HMs) in Miri beach sediments was assessed to quantify the abundance and determine the provenance. Surface sediment samples were collected in Miri beaches during low tide with respect to longitudinal, lateral and depth samplings. The collected samples were processed for grain size analysis by using sieving method. Then the HMs separation at different grain size fractions was carried out by using gravity and magnetic separation methods. Polarising Microscope was used to identify various HMs present in the sediment samples. In addition, selected sediment samples were analysed by using X-ray Fluorescence (XRF) to determine the elemental composition and major oxides for the geochemistry and provenance. From the results, HMs found in Miri beach sediments were zircon, magnetite, tourmaline, and rutile. Magnetite was abundant in 600–250 μm size fraction, zircon in 125–63 μm size fraction, tourmaline in 125–63 μm size fraction, and rutile in 250–125 μm size fraction. Longitudinally, magnetite was found to have higher abundance towards the southern part of the coastline. However, the abundance of rutile and tourmaline was found in the northern part of the coastline. Zircon was more abundant in the middle and southern parts of the coastline. Laterally, the concentration of HMs was higher towards the landward side. In terms of depth, the distribution of HMs varies and abundant in the surface sample. Geochemically, the beach sediments were found to be highly weathered in the north beaches (CIA = 78.9), moderately weathered in the middle (CIA = 63.8 to 66.5) and poorly weathered in the southern beaches (CIA = 40.4–49.6). The high content of quartz in the sediments are derived from the quartzose sedimentary origin, which undergone recycling process. Environmental indices such as contamination factor (CF), geoaccumulation index (Igeo), and enrichment factor (EF) indicate that the Miri beach sediments were highly concentrate
This article studies the natural convection in an annular porous microchannel in case of one wall being heated and another being cooled. For the first time, such a problem was solved using discrete symmetries of the N...
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Most companies use the services of blockchain as a service (BaaS) providers instead of developing their own blockchain (BC) solution. With the large number of different BaaS providers and their broad range of service ...
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Depth imaging is a crucial area in Autonomous Driving Systems (ADS), as it plays a key role in detecting and measuring objects in the vehicle’s surroundings. However, a significant challenge in this domain arises fro...
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The curriculum of Architecture, engineering, Construction, and Facility Management industries (AECO) is characterized by a variety of different subjects and thus teaching approaches, such as lectures, tutorials, proje...
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ISBN:
(纸本)9783031842238
The curriculum of Architecture, engineering, Construction, and Facility Management industries (AECO) is characterized by a variety of different subjects and thus teaching approaches, such as lectures, tutorials, project-based learning or inverted classroom. Especially for the postprocessing of teaching content, it is necessary that students have a comprehensive platform at their disposal. Here, it is not only important that documents are stored, but also that interaction can take place and that possibilities for the integration of gamification approaches are given. These requirements can be met by using the Metaverse in teaching. This paper presents the structures and requirements for a cross-curricular approach to teaching and learning in the Metaverse. For this purpose, the components of the Metaverse were initially made available as supplementary forms of teaching within the framework of the modules "Building Information Modeling", "Digital Design and Construction", and Computer Aided Facility Management" by using workshops and tutorials. The modules in the area of AECO are particularly suitable for evaluation, as they strengthen interdisciplinary cooperation. The impact of these additional forms of instruction was evaluated using a qualitative survey to assess the impact on learning outcomes. In addition, the students were asked to summarize their experiences in short papers describing advantages, limitations, necessary prerequisites, and possible course content. These qualitative and quantitative surveys and teaching evaluations are used as a basis for the development of a Metaverse-based teaching concept, that is described in the paper. The results show that the learning outcomes of the students increased by using the Metaverse as an additional learning tool. Especially complex issues can be better understood by the students, furthermore the independence of time and place is described as an advantage. On the other hand, the students state, that they are afraid
The research paper discusses the mechanical properties of red mud based geopolymer concrete. The effect of red mud addition to the precursor and the variation in molarity on the concrete property is assessed. After pr...
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The research paper discusses the mechanical properties of red mud based geopolymer concrete. The effect of red mud addition to the precursor and the variation in molarity on the concrete property is assessed. After preliminary investigation, the composition of the precursor in the concrete was taken as 40% red mud, 30% fly ash and 20% ground granulated blast furnace slag. Molarity varied from 6 to 10 M. To assess the impact of red mud, the outcomes were compared with fly ash- based geopolymer concrete (GC0, with 80% fly ash and 20% ground granulated blast furnace slag) and normal Portland cement concrete. The strength increased from 36.2 to 48.3 MPa which amounts to a 33.4% rise when fly ash was replaced with red mud. Experiments for determining setting time, density, compressive strength, flexural strength and split tensile strength were conducted for all variations including GC0 and normal concrete. Red mud-based concrete took a longer time to set and attain full strength. Addition of ground granulated blast furnace slag deemed necessary for red-based concrete under ambient curing conditions. The compressive and flexural strength of red mud-based concrete surpassed that of the other variations whereas fly ash-based concrete exhibited the highest split tensile strength. Geopolymer concrete with 30% red and 20% ground granulated blast furnace slag at 12 M molarity achieved a compressive strength of 56.8 MPa and corresponding flexural and split tensile strengths of 5.91 MPa and 2.82 MPa, showing a significant improvement over normal concrete. Red mud in the matrix delayed the setting time, enhanced compactness, and enabled a complete geopolymer reaction. To support future research on the mechanical properties of red mud-based concrete, this paper introduces an equation to estimate flexural and split tensile strength from compressive strength. This innovative contribution enhances our understanding of red mud’s potential in geopolymer concrete applications, offering v
Functionally graded composite/hybrid materials(FGCM/FGHCM)were produced by adding B_(4)C,TiO_(2),and B_(4)C+TiO_(2)ceramic materials at various ratios(0-50%)into the AA6082 *** analysis of the damage caused by^(60) io...
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Functionally graded composite/hybrid materials(FGCM/FGHCM)were produced by adding B_(4)C,TiO_(2),and B_(4)C+TiO_(2)ceramic materials at various ratios(0-50%)into the AA6082 *** analysis of the damage caused by^(60) ions'(1.173-1.1332 MeV)on the material was examined using the SRIM/TRIM Monte Carlo simulation *** the simulation,the following data regarding the atoms of the target materials were obtained:ion distribution,target ionization,total displacements,surface binding energy,lattice binding energy,and displacement *** the studied four materials,the one with the highest ion range value was found to be AA6082 with ***_(2)was found to be the reinforcement material that reduced the ion range the most in the *** to its high binding energy,B_(4)C reinforced AA6082+(0-50%)B_(4)C FGCM was found to have the least vacancy with 4782/ion.
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