An algorithm for calculating thermal conductivity and specific heat based on a thermal resistance model in the case of mono-dispersed was developed and applied to sand molds with various size distributions. The thermal properties of sand were calculated for artificial sand, and relatively close values were obtained compared to the experimental ...
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The current study provides an idea about the scope of waste foundry sand utilization. It also yields the modification in physical, mechanical, microstructural, and durability properties of ...
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Sand Sand is a naturally occurring granular material composed of finely divided loose particles derived from disintegrated rock. The most common constituent of sand is silica (silicon dioxide, SiO 2 ), usually in the form of quartz. Color of sand varies in shades of brown and orange. It provides bulk volume, strength, and other properties to construction materials like asphalt and …
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The case study area is in Baji sand d unes field which i s bounded by lat. 33° 31' 22" - 35° 40' 33" N and long. 42° 39' 05" - 45° 13" 00' E and located about 230 km north of Baghdad and a few ...
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These case studies were developed out of an interdisciplinary workshop series at Princeton University that began in 2017-18. They are the product of a research collaboration between the University Center for Human Values and the Center for Information Technology Policy at Princeton. Click the title of each case study to download the full document.
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Grows Business with Sand 3D Innovation CASE STUDY With nine decades of experience in sandcasting innovation, Kimura Foundry America places sand binder jetting at the core of its business to ... artificial ceramic sand to avoid the temperature limitations of silica sand. By suppressing the expansion of the material, even at melting ...
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This open access collection of AI ethics case studies is the first book to present real-life case studies combined with commentaries and strategies for overcoming ethical challenges. Case studies are one of the best ways to learn about ethical dilemmas and to achieve insights into various complexities and stakeholder perspectives.
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One of the cheapest and the easiest ways of getting substitute for natural sand is by crushing natural stone to get artificial sand of desired size and grade. In the present paper an attempt …
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In this study, low-altitude UAV remote sensing technology and imaging-based quantification techniques were used to explore the effects of biotic and abiotic factors on the spatial patterns of sand ...
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A mixed method approach was adopted in the case study that included qualitative (in-depth interview with 30 sand miners, transect walks, field observations and photography) and quantitative ...
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Effects of offshore artificial islands on beach stability of sandy shores: case study of Hongtang Bay, Hainan Province September 2022 Frontiers of Earth Science 16(6):1-14
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Countermeasures and analysis on the positive and negative environmental effect of offshore artificial island reclamation——a case study of artificial island project of Riyue Bay Hainan. Transact Ocean Limn, (2): 17–23 (in Chinese) Zhao D (2014). Study on the sandy beach erosion and protection technology of the offshore artificial sand bar.
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Case Study: Influence of Artificial Mountain Construction with Isolation ... sand, slag, etc., which may cause large vertical and hori-zontal displacement and great change of the stress and strain states of the foundation soil because of the heavy additional load [5]. It …
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ABSTRACT: One 350 hectare artificial island using hydraulic dredging sand is newly formed in North Jakarta. The sand is poorly graded with most particle size in the range of 0.2 ~ 0.5 mm …
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The method's unique feature is its ability to isolate shale areas and identify weak areas capable of producing sand in sandstone formations. In conclusion, it is determined that an Artificial Neural Network employing the back-propagation algorithm is a simple, reliable, and easy-to-use method for accurately predicting sand production
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sands are limiting or overwhelmed, demanding new sources of artificial sand. In this study, we have proposed such an alternate source of natural sand by hand cutting of water pouches in fine size and also in the form granules produced from mechanized process. Figure 2, illustrates the artificial sand obtained from water-pouch. Details
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This case study outlines a methodology to optimize and control hydraulic fracturing parameters by achieving ... 19% 100 mesh, 29% 40/70, 52% 30/50 sand; 21 bpm/cluster; 391-ft stage spacing (plug to plug) ... despite the operator producing from the same formation, drilling the same lateral lengths, and deploying the same artificial lift ...
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A POORLY GRADED SAND COMPACTION CASE STUDY Liu Yu 1, Marcello Djunaidy 2 ABSTRACT: One 350 hectare artificial island using hydraulic dredging sand is newly formed in North Jakarta. The sand is poorly graded with most particle size in the range of 0.2 ~ 0.5 mm in loose and saturated condition. Dynamic
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In this study artificial neural networks (ANN) are used to simulate the monotonic and cyclic behaviour of sands observed in laboratory tests on Karlsruhe sand under drained and undrained conditions. A genetic algorithm (GA) is used to obtain an optimal framework for the ANN.
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Abstract: This review paper shows the replacement of river or natural sand with artificial sands so as to give the maximum strength of concrete or any structure when replacing the natural sand …
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Sand and gravel mining has been one of the serious environmental problems around the globe in recent years. This often results in land degradation, loss of agricultural lands and biodiversity as well increased poverty among people. In order to address these problems, pragmatic and explicit laws and regulations have to be developed by countries in a participatory manner so as to …
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Variations were made to the ratio of LDPE to sand, the proportion of basalt fibers, and sand particle size. Paver blocks were evaluated for their compressive strength, water absorption, and at ...
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Common sand fences which consist of vertical wooden slats joined with wire are used. As these typical sand fences are generally 0.8 to 1.2 m high, the installation of two superimposed fences is recommended to avoid any exfiltration of sand or algae deposits during a lowering of the beach level phases.
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Sand Mining Effects, Causes and Concerns: A Case Study from Bestari Jaya, Selangor, Peninsular Malaysia March 2011 Scientific Research and Essays 6(6):1216-1231
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This paper presents a (unique) case study overview of the key activities undertaken and the measurement data and observations made during the construction of a full size elite level artificial ...
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The case study is a degraded coastal beach in the Ebro Delta (Spain). The results reveal a significant decrease in erosion when the dune is positioned closest to the shoreline.
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8 CASE STUDY ON ARTIFICIAL INTELLIGENCE. 113. Europe. This is more timely given the growing debate at both EU and MS levels regarding AI. 1Government and Policy . The Chinese government has played an important role in the establish-ment of China's AI NIS and putting it on the path to catch up with competitors.
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The second case involves the Naples subway and concerns a 50 m long platform tunnel for the Università metro station. The third study concerns the application of AGF in the undercrossing of the Limmat River in Zurich by a double track tunnel. The emphasis varies in these three case studies. In the first case, all of the relevant data was ...
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Request PDF | An Impervious Sand Used as Separation Layer in Collapsible Loess Embankment: A Case Study | In this study, a novel impervious sand is modified from the desert sand. It has a good ...
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Some Maasai communities in northern Tanzania face severe water quality and scarcity issues, significantly impacting the health and living conditions of the local population. To address the water quality challenges faced by one of the Maasai communities, where thousands of residents consume water with high turbidity and contaminants, a team of volunteers, …
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