scholarly journals Design and fabrication of potters kick wheel for ceramic wares production

2021 ◽  
Vol 6 (1) ◽  
pp. 099-107
Author(s):  
Olusola Joseph Ajayi ◽  
Tolulope Sayo Toludare ◽  
Yinusa Daniel Lamidi
Keyword(s):  
Energy Cost ◽  
Design Principle ◽  
Low Cost ◽  
Ceramic Ware ◽  
Pottery Production ◽  
Hollow Ware ◽  
Cost Of Materials

An attempted to produce or fabricate a functional kick wheel have failed because some important principles guiding the fabrication of the kick wheel was neglected. Some of these are improper centered wheel head and low rotating force from the fly wheel. In this research, a design was generated in a bid to produce a functional kick wheel for pottery production using a marsonial wood for the skeletal part. The kick wheel was designed in such a way that the fly wheel and the centering can be self-controlled. Low cost of materials, reduced energy, lesser stress and conveniences during operation are all considered in the design principle. From the result of the ceramic ware produced, it was discovered that the machine can produce hollow ware with a well centered base with the advantage of self-reliant, no energy cost and less stress during usage.

scholarly journals Upcycling of Vine Shoots: Production of Fillers for PHBV-Based Biocomposite Applications

2020 ◽  
Author(s):  
Grégoire David ◽  
Laurent Heux ◽  
Stéphanie Pradeau ◽  
Nathalie Gontard ◽  
Hélène Angellier-Coussy
Keyword(s):  
Water Vapor ◽  
Gas Phase ◽  
Mechanical Performance ◽  
Low Cost ◽  
Water Vapor Permeability ◽  
Contact Angles ◽  
Vapor Permeability ◽  
Water Contact ◽  
Median Diameter ◽  
Cost Of Materials

Abstract This paper aims at investigating the potential of vine shoots (ViSh) upcycling as fillers in novel poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHBV) based biocomposites. ViSh particles of around 50 µm (apparent median diameter) were obtained combining dry grinding processes, and mixed with PHBV using melt extrusion. Thermal stability and elongation at break of biocomposites were reduced with increasing contents of ViSh particles (10, 20 and 30 wt%), while Young’s modulus and water vapor permeability were increased. It was shown that a surface gas-phase esterification allowed to significantly increase the hydrophobicity of ViSh particles (increase of water contact angles from 59° to 114°), leading to a reduction of 27% in the water vapor permeability of the biocomposite filled with 30 wt% of ViSh. The overall mechanical performance was not impacted by gas-phase esterification, demonstrating that the interfacial adhesion between the virgin ViSh particles and the PHBV matrix was already good and that such filler surface treatment was not required in that case. It was concluded that ViSh particles can be interestingly used as low cost fillers in PHBV-based biocomposites to decrease the overall cost of materials.

scholarly journals Privacy-Preserving Efficient Data Retrieval in IoMT Based on Low-Cost Fog Computing

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Na Wang ◽  
Yuanyuan Cai ◽  
Junsong Fu ◽  
Jie Xu
Keyword(s):  
Energy Cost ◽  
Data Privacy ◽  
Low Cost ◽  
Rapid Development ◽  
Fog Computing ◽  
Bat Algorithm ◽  
Data Retrieval ◽  
High Energy ◽  
Physiological Data ◽  
Range Tree

The rapid development of Internet of Medical Things (IoMT) is remarkable. However, IoMT faces many problems including privacy disclosure, long delay of service orders, low retrieval efficiency of medical data, and high energy cost of fog computing. For these, this paper proposes a data privacy protection and efficient retrieval scheme for IoMT based on low-cost fog computing. First, a fog computing system is located between a cloud server and medical workers, for processing data retrieval requests of medical workers and orders for controlling medical devices. Simultaneously, it preprocesses physiological data of patients uploaded by IoMT, collates them into various data sets, and transmits them to medical institutions in this way. It makes the entire execution process of low latency and efficient. Second, multidimensional physiological data are of great value, and we use ciphertext retrieval to protect privacy of patient data in this paper. In addition, this paper uses range tree to build an index for storing physiological data vectors, and meanwhile a range retrieval method is also proposed to improve data search efficiency. Finally, bat algorithm (BA) is designed to allocate cost on a fog server group for significant energy cost reduction. Extensive experiments are conducted to demonstrate the efficiency of the proposed scheme.

scholarly journals A Novel Capacitive Sensing Principle for Microdevices

2015 ◽  
Author(s):  
Jian Zhou ◽  
Ronald N. Miles ◽  
Shahrzad Towfighian
Keyword(s):  
Electric Field ◽  
Driving Force ◽  
Design Principle ◽  
Electrostatic Force ◽  
Low Cost ◽  
Repulsive Force ◽  
Attractive Force ◽  
Sensor Design ◽  
Capacitive Sensing

Conventional capacitive sensing places significant limitations on the sensor design due to the pull-in instability caused by the electrostatic force. The main purpose of this study is to examine a low-cost novel capacitive sensing principle based on electrostatic balance which promises to avoid these design limitations. The approach uses an asymmetric electric field on a structure with fingers that can generate a repulsive force while the gap is low and create an attractive force while the gap is large. The size and thickness of the fingers are also responsible for creating repulsive or attractive forces on the structure. This approach has recently been applied successfully in the design of capacitive actuators to provide a repulsive driving force. A new design principle for capacitive sensing is described that avoids pull-in instability by designing the fingers such that the structure is at the equilibrium.

Characterization of Material Transfer in Friction Stir Processing With a Consumable Tool

2018 ◽  
Author(s):  
Scott Miller
Keyword(s):  
Low Temperature ◽  
Friction Stir Processing ◽  
Steel Substrate ◽  
Low Cost ◽  
Material Transfer ◽  
Friction Stir ◽  
Friction Surfacing ◽  
Potential Benefits ◽  
Cost Of Materials ◽  
Mechanical Bonding

This is a study of material transfer from a consumable tool to a substrate. The major advantage of this technique is material adheres by mechanical bonding at relatively low temperature, with potential benefits of high bonding strength, low temperature and thermal effects, high tolerance to contamination, environmentally benign, and low cost of materials, tooling, and process. There is an increasing need for dissimilar material surfacing and coating applications, leading to the study of the friction surfacing process. Friction surfacing experiments were done for depositing different materials to a steel substrate. Subsequent surface roughness and material analysis was done to characterize the nature of material transfer and adhesion to the substrate. The results suggest that friction stir processing by a consumable tool is capable of producing a smooth coating with good metallurgical properties.

scholarly journals Thermodynamic and Aerodynamic Analysis of an Air-Driven Fan System in Low-Cost High-Bypass-Ratio Turbofan Engine

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1917 ◽  
Author(s):  
Weiyu Lu ◽  
Guoping Huang ◽  
Xin Xiang ◽  
Jinchun Wang ◽  
Yuxuan Yang
Keyword(s):  
Numerical Simulation ◽  
Design Principle ◽  
Low Cost ◽  
Complex Structure ◽  
Batch Production ◽  
Turbofan Engine ◽  
The Core ◽  
And Performance ◽  
Core Part ◽  
Bypass Ratio

In some cases, the improvement of the bypass ratio (BPR) of turbofans is pursued for military or civilian purposes owing to economic, environmental, and performance reasons, among others. However, high-BPR turbofans suffer from incompatibility of spool speed, complex structure for manufacture, development difficulty, and substantially increasing costs, especially for those with small batch production. To deal with the issues, a novel low-cost concept of high-BPR turbofan with air-driven fan (ADTF) is presented in this research. First, the problems faced by high-BPR turbofans are discussed, and the difficulties of geared turbofan (GTF), which is developed as a solution to the problems, are analyzed. A novel turbofan with potential advantages is proposed, and its basic theory is interpreted. Second, high-BPR ADTF is analyzed at the top level, and the design principle and important primary parameters are discussed. Some important concepts and criteria are proposed, enabling the comparison between ADTF and GTF. Finally, an air-driven fan system, the core part of ADTF, is exploratorily designed, and numerical simulation is performed to demonstrate its feasibility.

Application of Polymer Plaster Composites in Additive Manufacturing of High-Strength Components

2015 ◽  
Vol 825-826 ◽  
pp. 763-770 ◽  
Author(s):  
Stefan Junk ◽  
Rebecca Matt
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Low Cost ◽  
New Technology ◽  
High Strength ◽  
Testing Specimen ◽  
Whole Process ◽  
Infiltration Technique ◽  
Cost Of Materials ◽  
The Cost

Today, 3D-printing with polymer plaster composites is a common method in Additive Manufacturing. This technique has proven to be especially suitable for the production of presentation models, due to the low cost of materials and the possibility to produce color-models. But nowadays it requires refinishing through the manual application of a layer of resin. However, the strength of these printed components is very limited, as the applied resin only penetrates a thin edge layer on the surface. This paper develops a new infiltration technique that allows for a significant increase in the strength of the 3D-printed component. For this process, the components are first dehydrated in a controlled two-tier procedure, before they are then penetrated with high-strength resin. The infiltrate used in this process differs significantly from materials traditionally used for infiltration. The result is an almost complete penetration of the components with high-strength infiltrate. As the whole process is computer-integrated, the results are also easier to reproduce, compared to manual infiltration. On the basis of extensive material testing with different testing specimen and testing methods, it can be demonstrated that a significant increase in strength and hardness can be achieved. Finally, this paper also considers the cost and energy consumption of this new infiltration method. As a result of this new technology, the scope of applicability of 3D-printing can be extended to cases that require significantly more strength, like the production of tools for the shaping of metals or used for the molding of plastics. Furthermore, both the process itself and the parameters used are monitored and can be optimized to individual requirements and different fields of application.

scholarly journals Self-discharge of magnesium–sulfur batteries leads to active material loss and poor shelf life

2021 ◽  
Vol 14 (2) ◽  
pp. 890-899
Author(s):  
Hunter O. Ford ◽  
Emily S. Doyle ◽  
Peng He ◽  
William C. Boggess ◽  
Allen G. Oliver ◽  
...  
Keyword(s):  
Energy Density ◽  
Shelf Life ◽  
Low Cost ◽  
Active Material ◽  
High Energy ◽  
High Energy Density ◽  
Great Promise ◽  
Material Loss ◽  
Cost Of Materials ◽  
Sulfur Battery

The magnesium–sulfur battery holds great promise for energy storage due to its high energy density and low cost of materials. Unfortunately, current Mg–S electrolytes are found to enable severe self-discharge, leading to poor battery shelf-life.

scholarly journals Automated Low-Cost LED-Based Sun Photometer for City Scale Distributed Measurements

2021 ◽  
Vol 13 (22) ◽  
pp. 4585
Author(s):  
Cristobal Garrido ◽  
Felipe Toledo ◽  
Marcos Diaz ◽  
Roberto Rondanelli
Keyword(s):  
Temporal Resolution ◽  
Low Cost ◽  
Calibration Transfer ◽  
Calibration Uncertainty ◽  
Global Coverage ◽  
Sun Photometer ◽  
Cost Of Materials ◽  
The Cost ◽  
The City ◽  
Lower Temporal Resolution

We propose a monochromatic low-cost automatic sun photometer (LoCo-ASP) to perform distributed aerosol optical depth (AOD) measurements at the city scale. This kind of network could fill the gap between current automatic ground instruments—with good temporal resolution and accuracy, but few devices per city and satellite products—with global coverage, but lower temporal resolution and accuracy-. As a first approach, we consider a single equivalent wavelength around 408 nm. The cost of materials for the instrument is around 220 dollars. Moreover, we propose a calibration transfer for a pattern instrument, and estimate the uncertainties for several units and due to the internal differences and the calibration process. We achieve a max MAE of 0.026 for 38 sensors at 408 nm compared with AERONET Cimel; a mean standard deviation of 0.0062 among our entire sensor for measurement and a calibration uncertainty of 0.01. Finally, we perform city-scale measurements to show the dynamics of AOD. Our instrument can measure unsupervised, with an expected error for AOD between 0.02 and 0.03.

Smart home autonomous water management system for agricultural applications

2020 ◽  
Vol 17 (3) ◽  
pp. 445-455
Author(s):  
Hariprasath Manoharan ◽  
Adam Raja Basha ◽  
Yuvaraja Teekaraman ◽  
Abirami Manoharan
Keyword(s):  
Energy Cost ◽  
Low Cost ◽  
Irrigation Management ◽  
Information Gathering ◽  
Path Selection ◽  
Network Simulator ◽  
Agricultural Water ◽  
Cost Information ◽  
Content Type ◽  
Selection Technique

Purpose In recent days, there is a huge loss in the income of farmers due to the reasons such as low water lever and increased pesticide attack. Therefore, the purpose of this paper is to establish an efficient reliable low-cost information gathering Reliable Low-Cost Information Gathering Protocol (RLCIG) protocol for agricultural water irrigation using optimal clustering and path selection technique where the RCIG protocol wrinkles the expedient statistics about the moisture and temperature of the soil and it will be installed few inches below the pipeline. Thereafter, the congregated data will augment the irrigation of water by using a decision-making algorithm. Design/methodology/approach The projected model has been inscribed mathematically by underlying the wireless sensor networks (WSN) framework with deliberation of contemporary challenges. Furthermore, the energy, cost and expanse optimization framework in the WSN framework is presented. The projected technique has been tested using network simulator and the results are also integrated MATLAB. Findings Recently, for efficacious management in the field of agriculture, the WSN has been successfully assimilated. This instigation accomplishes the irrigation management in terms of energy, cost and communication distance. The simulation result shows that the proposed model yields better results in terms of both the transmission range and cost with efficient lifetime improvement in comparisons with existing techniques. Originality/value Agriculture is the need of the time whatever invention happens in the scientific world without food production no lives survive on the earth, hence, the scientific invention should also focus on agriculture, in this contrast, the authors have proposed an efficient low-cost information gathering (RCIG) protocol for agricultural water irrigation using optimal clustering and path selection technique.

scholarly journals The Argaric Pottery from Burial at Peñalosa (Jaén, Spain)

2020 ◽  
Vol 47 ◽  
pp. 330-347
Author(s):  
Laura Vico Triguero ◽  
Jesús Gámiz Caro ◽  
Francisco Martín Peinado ◽  
Alejandra García García ◽  
Eva Alarcón García ◽  
...  
Keyword(s):  
Systematic Study ◽  
Analytical Techniques ◽  
Ceramic Production ◽  
Ceramic Ware ◽  
X Ray Diffraction ◽  
Pottery Production ◽  
X Ray ◽  
Funerary Rituals ◽  
And Function ◽  
Formal Features

The interpretation of the manufacture and function of Argaric burial potteries has not been subject to a global and systematic study. As such, this paper has reconstructed the sequence of ceramic production of burial potteries of Peñalosa using analytical techniques (stereomicroscopy, X-ray diffraction and optical petrography). Ceramic ware technological features, as well as other indicators of use and repair, indicate that the pottery was used prior to the burial either in domestic contexts or during funerary rituals. This finding contrasts with data obtained at other Argaric sites, where technological and formal features point to pottery production specifically intended for burials.

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