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Online since: October 2013
Authors: Peng Jia
In order to investigate and ameliorate the machinability of glass, and achieve optical parts with the satisfied surface quality and dimensional accuracy, this paper first conducted SF6 indentation experiment by Vickers microhardness instrument, and then the scratching tests with increasing depths of cut were conducted on glass SF6 to evaluate the influence of the cutting fluid properties on the machinability of glass.
Glass is brittle, although high hardness and high brittleness make the machining of glasses relatively difficult, the demand for precision parts made from them has risen at a very fast rate primarily because of other superior physical, mechanical, optical or electronic properties [2].
The roughness Ra of mechanical polishing sample surface is 12nm, and no cracks and fragments on the specimen surface were observed with optical microscope.
Glass is brittle, although high hardness and high brittleness make the machining of glasses relatively difficult, the demand for precision parts made from them has risen at a very fast rate primarily because of other superior physical, mechanical, optical or electronic properties [2].
The roughness Ra of mechanical polishing sample surface is 12nm, and no cracks and fragments on the specimen surface were observed with optical microscope.
Online since: October 2017
Authors: Fatemeh Kalantari, Osman Mohd Tahir, Ahmad Mahmoudi Lahijani, Shahaboddin Kalantari
In this study, technology as one of the important factor of Vertical farming is discussed and reviewed by qualitative approach.
For an instant as to supply 15000 people with food, this high-rise building is designed with these properties: size of the vertical farm: 93 ha (about the size of a block), 37 floors, 25 of which are just for producing crops and 3 for aquaculture.
Knowing about the amounts of crops to be produced as well as probable diseases significantly affect the creation of a healthy environment for growing food preventing diseases.
Considering the influence of buildings on the reduction of energy consumption which negatively affects the environment, a number of strategies exist such as: ‘reduced energy needs’, ‘increased energy efficiency’ as well as ‘passive design techniques applied’.
Rafeeu, “A review on factors for maximizing solar fraction under wet climate environment in Malaysia,” Renew.
For an instant as to supply 15000 people with food, this high-rise building is designed with these properties: size of the vertical farm: 93 ha (about the size of a block), 37 floors, 25 of which are just for producing crops and 3 for aquaculture.
Knowing about the amounts of crops to be produced as well as probable diseases significantly affect the creation of a healthy environment for growing food preventing diseases.
Considering the influence of buildings on the reduction of energy consumption which negatively affects the environment, a number of strategies exist such as: ‘reduced energy needs’, ‘increased energy efficiency’ as well as ‘passive design techniques applied’.
Rafeeu, “A review on factors for maximizing solar fraction under wet climate environment in Malaysia,” Renew.
Online since: October 2015
Authors: Mark Jermy, Tim Flint, Tze How New, Wei Hua Ho
Validated Unsteady Computational Fluid Dynamic Analysis of an Oscillating Bio-Inspired Airfoil
Tim Flint1,a *, Wei Hua Ho2,b , Tze How New3,c and Mark Jermy1,d
1 Mechanical Engineering Department, University of Canterbury, New Zealand
2 Department of Mechanical and Industrial Engineering, University of South Africa, South Africa
3 School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
atimjflint@gmail.com, *bhowh@unisa.ac.za, cdthnew@ntu.edu.sg, dmark.jermy@canterbury.ac.nz
Keywords: Computational Fluid Dynamics; Particle Image Velocimetry; Oscillating Airfoil; Bio-Inspired Airfoil.
The main factor contributing to the dragonfly’s ability is the presence of four independently controlled wings.
The present study aims to provide insight into the characteristics of viscous flows forming around oscillating airfoil and how corrugations similar to those seen on dragonfly wings affect their unsteady aerodynamic properties.
The main factor contributing to the dragonfly’s ability is the presence of four independently controlled wings.
The present study aims to provide insight into the characteristics of viscous flows forming around oscillating airfoil and how corrugations similar to those seen on dragonfly wings affect their unsteady aerodynamic properties.
Online since: March 2019
Authors: Nurul Aida Sulaiman, Soraya Nanis Hamdan, Norin Zamiah Kassim Shaari
Thin film composite membrane is one of the types of membrane filtration that composed of two layers bonded together so that it can withstand the mechanical stresses generated by the operating conditions [9].
The chitosan has been claimed as unique because of its properties as chelating agent and its ability to absorb various organic compound including heavy metals effectively [1].
Polysulfone membrane, which is prepared by phase-inversion provides a mechanical support to the thin layer, which does not affect the separation performance [10].
For vial B and D, the reading was multiplied by each dilution factor respectively. 2.2.1.3 Total Suspended Solid (TSS) The TSS test was conducted according to standard method ASTM D5907-13 [13].
However, it could be compensated with the good mechanical strength of Membrane B [14].
The chitosan has been claimed as unique because of its properties as chelating agent and its ability to absorb various organic compound including heavy metals effectively [1].
Polysulfone membrane, which is prepared by phase-inversion provides a mechanical support to the thin layer, which does not affect the separation performance [10].
For vial B and D, the reading was multiplied by each dilution factor respectively. 2.2.1.3 Total Suspended Solid (TSS) The TSS test was conducted according to standard method ASTM D5907-13 [13].
However, it could be compensated with the good mechanical strength of Membrane B [14].
Online since: February 2026
Authors: Nuno Dinis Cortiços
Standardized inputs were used to assess envelope properties (U-values, mass, lag, airtightness), energy use (heating, cooling, DHW, appliances), and construction costs.
Multiple validation strategies ensured research quality and reliability: Cross-Reference Validation: Technical data were cross-referenced across multiple sources, including European technical databases, Portuguese construction standards, and published research on vernacular architecture thermal properties.
Mechanical ventilation adds ~4 kWh/m².
Tajani, Assessment of the Thermal Properties of Buildings in Eastern Almería (Spain) during the Summer in a Mediterranean Climate, Sustainability 16 (2024) 746. https://doi.org/10.3390/su16020746
Frontini, Solar Energy in Urban Environment: How Urban Densification Affects Existing Buildings, Energy Procedia 48 (2014) 1559–1569. https://doi.org/10.1016/ j.egypro.2014.02.176
Multiple validation strategies ensured research quality and reliability: Cross-Reference Validation: Technical data were cross-referenced across multiple sources, including European technical databases, Portuguese construction standards, and published research on vernacular architecture thermal properties.
Mechanical ventilation adds ~4 kWh/m².
Tajani, Assessment of the Thermal Properties of Buildings in Eastern Almería (Spain) during the Summer in a Mediterranean Climate, Sustainability 16 (2024) 746. https://doi.org/10.3390/su16020746
Frontini, Solar Energy in Urban Environment: How Urban Densification Affects Existing Buildings, Energy Procedia 48 (2014) 1559–1569. https://doi.org/10.1016/ j.egypro.2014.02.176
Online since: July 2025
Authors: Anugrah Ricky Wijaya, Surjani Wonorahardjo, Alif Alfarisyi Syah, Adilah Aliyatulmuna, Khoiril Amin
In addition, seawater intrusion is also a major risk factor for causing hypertension when consumed [4].
Another possibility is structural changes and changes in the physical or chemical properties of calcium alginate/GO during prolonged contact with Cl- ions such as changes in surface active sites that reduce adsorption power.
The higher the concentration of CaCl2, the more Ca+ ions will bind to carboxylic groups and oxygen groups that can strengthen the structure of calcium alginate/GO beads and strengthen material properties so as to increase the ability to adsorb Na+ ions.
Bhandari, “Alginate gel particles–A review of production techniques and physical properties,” Crit.
Wu et al., “Adsorption Properties of Doxorubicin Hydrochloride onto Graphene Oxide: Equilibrium, Kinetic and Thermodynamic Studies,” Materials, vol. 6, no. 5, pp. 2026–2042, May 2013, doi: 10.3390/ma6052026
Another possibility is structural changes and changes in the physical or chemical properties of calcium alginate/GO during prolonged contact with Cl- ions such as changes in surface active sites that reduce adsorption power.
The higher the concentration of CaCl2, the more Ca+ ions will bind to carboxylic groups and oxygen groups that can strengthen the structure of calcium alginate/GO beads and strengthen material properties so as to increase the ability to adsorb Na+ ions.
Bhandari, “Alginate gel particles–A review of production techniques and physical properties,” Crit.
Wu et al., “Adsorption Properties of Doxorubicin Hydrochloride onto Graphene Oxide: Equilibrium, Kinetic and Thermodynamic Studies,” Materials, vol. 6, no. 5, pp. 2026–2042, May 2013, doi: 10.3390/ma6052026
Online since: June 2014
Authors: Vladimir V. Popov, E.N. Popova, Sergiy V. Divinski, Gerrit Reglitz, Alexey V. Stolbovsky, D.D. Kuznetsov, Evgeniy V. Shorohov, Gerhard Wilde
Histograms of grain size distributions in Ni after HPT at 80K (a) and annealing at 100 (b); 200 (c); 300 (d) and 400оС, 1 h (e)
The deformation temperature affects strongly the thermal stability of the microstructure.
As a rule, fragmentation of structure by various techniques of SPD is accompanied by modification of mechanical properties of materials, particularly, by significant strengthening.
Thus, 3 passes of DCAP result in the microhardness growth by a factor of more than 3.
That is why it is of great importance to study the evolution of structure obtained by various techniques of SPD and variation of mechanical characteristics, particularly of microhardness, at further annealing.
Microhardness of Ni after different mechanical treatment Treatment Microhardness, MPa Treatment Microhardness, MPa ECAP, 2 passes 2710 DCAP, 1 pass 2690 ECAP, 4 passes 2830 DCAP, 2 passes 2990 ECAP, 8 passes 3180 DCAP, 3 passes 3190 Fig. 11.
As a rule, fragmentation of structure by various techniques of SPD is accompanied by modification of mechanical properties of materials, particularly, by significant strengthening.
Thus, 3 passes of DCAP result in the microhardness growth by a factor of more than 3.
That is why it is of great importance to study the evolution of structure obtained by various techniques of SPD and variation of mechanical characteristics, particularly of microhardness, at further annealing.
Microhardness of Ni after different mechanical treatment Treatment Microhardness, MPa Treatment Microhardness, MPa ECAP, 2 passes 2710 DCAP, 1 pass 2690 ECAP, 4 passes 2830 DCAP, 2 passes 2990 ECAP, 8 passes 3180 DCAP, 3 passes 3190 Fig. 11.
Online since: June 2013
Authors: Pu Liu, Zheng Hong Peng
It enables users to visually see the urban street scope, to autonomously roam in the three-dimensional scene and to undertake operations such as query, measurement and flight browsing, so as to understand the direction of future planning and development of enterprises, building districts and even cities as well as to provide visualized geospatial information services for urban construction planning, community services, property management, tourism, transportation, fire safety and so on.
Urban planners can build a wealth of information of a city such as roads, buildings, residential areas and commercial outlets into database and transform into the virtual environment; and then enter the virtual environment through the man-machine dialogue tools and get to know and judge the advantages and disadvantages of various planning programs with different dominant factors through personal observation and experience.
The virtual urban technology includes a comprehensive variety of techniques including: virtual environment modeling, real-time display of complex scenes, mechanical feedback, tactile feedback, human-computer interaction, stereo synthesis, speech recognition and input, and system integration technology.
First, it requires high-precision professional cameras and also has high requirement for the shooting angle, or the generated scenes may be easily distorted and it may affect seamless stitching; besides, shooting light, brightness and shadows should be as consistent as possible, otherwise, after stitching, color may be inconsistent.
Once various instances are created, they will be added to the list of items and all instances can be searched by the name of the index; so when users get the instance’s handle, they can process its properties.
Urban planners can build a wealth of information of a city such as roads, buildings, residential areas and commercial outlets into database and transform into the virtual environment; and then enter the virtual environment through the man-machine dialogue tools and get to know and judge the advantages and disadvantages of various planning programs with different dominant factors through personal observation and experience.
The virtual urban technology includes a comprehensive variety of techniques including: virtual environment modeling, real-time display of complex scenes, mechanical feedback, tactile feedback, human-computer interaction, stereo synthesis, speech recognition and input, and system integration technology.
First, it requires high-precision professional cameras and also has high requirement for the shooting angle, or the generated scenes may be easily distorted and it may affect seamless stitching; besides, shooting light, brightness and shadows should be as consistent as possible, otherwise, after stitching, color may be inconsistent.
Once various instances are created, they will be added to the list of items and all instances can be searched by the name of the index; so when users get the instance’s handle, they can process its properties.
Online since: January 2012
Authors: Ai Dong Liu, Hui Luo, Rui Xiong Hu
The Functions of Business Management
Fayol business activities will be divided into technical activities (production, manufacturing, processing), commercial activities (buy, sell, exchange), Financial activities (to raise and appropriate use of capital), accounting activities (business conditions and the evelopment of visual expression - property, inventory, balance sheet, costs, statistics), security activities protection of property and personnel), management activities (planning, organizing, directing, coordination and control).
Political and Economic Impact on Businesses Businesses Land and population is the primary factor in the national economy, measured in monetary value created by labor and land as the true form of surplus value.
In addition to profits, entrepreneurs, political leadership and political vision to become a key factor.
Lewin stressed field theory, group dynamics, floor elements affect each other.
China's Urban Management Application Innovation Park, property networking through information communication technology ICT, intelligent sensor networks (RFID, mobile devices, PLC, location tracking systems, environmental sensors), began to develop in various places.
Political and Economic Impact on Businesses Businesses Land and population is the primary factor in the national economy, measured in monetary value created by labor and land as the true form of surplus value.
In addition to profits, entrepreneurs, political leadership and political vision to become a key factor.
Lewin stressed field theory, group dynamics, floor elements affect each other.
China's Urban Management Application Innovation Park, property networking through information communication technology ICT, intelligent sensor networks (RFID, mobile devices, PLC, location tracking systems, environmental sensors), began to develop in various places.
Online since: August 2008
Authors: Wolfgang Skorupa, L. Rebohle
Among the various candidates MOS structures feature with their excellent electrical and
mechanical properties of SiO2 and their full compatibility to current Si technology.
These excellent attributes can now be combined with the optical properties of RE.
In this article we will survey our specific approach to Si based photonics, namely REimplanted MOS devices, which combines the excellent properties of MOS structures with the optical properties of RE ions.
Finally the dependence of the EL properties on the anneal temperature should be discussed.
This indicates that with increasing Tb concentration a non-radiative decay path affecting only the 5D3 level becomes more and more intense.
These excellent attributes can now be combined with the optical properties of RE.
In this article we will survey our specific approach to Si based photonics, namely REimplanted MOS devices, which combines the excellent properties of MOS structures with the optical properties of RE ions.
Finally the dependence of the EL properties on the anneal temperature should be discussed.
This indicates that with increasing Tb concentration a non-radiative decay path affecting only the 5D3 level becomes more and more intense.