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Online since: December 2016
Authors: Balázs Nagy, Emese Paulik
The conversions of the thermal conductivity to design values can be done using the following formulas:
FT=efTT2-T1 (1)
Fm=efψψ2-ψ1 (2)
λ2=λ1∙FT∙Fm∙Fa [W·m-1·K-1] (3)
where FT, Fm are the conversion factors of temperature, moisture and ageing. fT is the temperature conversion coefficient, fψ is the moisture conversion coefficient volume by volume which values are specific to the materials.
Nehme (BME Dept. of Construction Materials and Technologies) for his help and advices during the preparation of the concrete samples and material testing laboratory tests, and Lili Laczák (BME Dept. of Structural Engineering) for her help and advices in static design.
References [1] MSZ EN ISO 10456:2008, Building materials and products.
Tasdemir, The Thermal Insulation and Strength Properties of Light Concretes, The Journal of Turkey Engineering News 427 (2003) pp. 57-61
Szagri, Hygrothermal properties of steel fiber reinforced concretes, Applied Mechanics and Materials 824 (2016) pp. 579-588
Nehme (BME Dept. of Construction Materials and Technologies) for his help and advices during the preparation of the concrete samples and material testing laboratory tests, and Lili Laczák (BME Dept. of Structural Engineering) for her help and advices in static design.
References [1] MSZ EN ISO 10456:2008, Building materials and products.
Tasdemir, The Thermal Insulation and Strength Properties of Light Concretes, The Journal of Turkey Engineering News 427 (2003) pp. 57-61
Szagri, Hygrothermal properties of steel fiber reinforced concretes, Applied Mechanics and Materials 824 (2016) pp. 579-588
Online since: June 2022
Authors: Raul Fangueiro, João Bessa, Luisa M. Arruda, Inês P. Moreira, Inês Boticas
When it comes to detecting physical signals, as body pressure, carbon-based materials are an adequate resource, mainly due to their thermal and mechanical properties, along with their piezoresistive behavior, that is, the ability to change its electrical resistance from a mechanical deformation.
Among these, graphene nanoplatelets (GNPs) have a more affordable price when compared to other carbon-based materials, making it more applicable on an industrial scale [6, 7].
Plasma treatment is a surface treatment of different materials that takes place from the equal discharge of positively and negatively charged particles [11].
Experimental Materials and methods Materials.
It is also possible to observe an increase in roughness in the samples that received the corrosion treatment with NaOH, due to the extraction of low molecular weight materials and the presence of lignin in them [15].
Among these, graphene nanoplatelets (GNPs) have a more affordable price when compared to other carbon-based materials, making it more applicable on an industrial scale [6, 7].
Plasma treatment is a surface treatment of different materials that takes place from the equal discharge of positively and negatively charged particles [11].
Experimental Materials and methods Materials.
It is also possible to observe an increase in roughness in the samples that received the corrosion treatment with NaOH, due to the extraction of low molecular weight materials and the presence of lignin in them [15].
Online since: December 2006
Authors: Eun Young Choi, Kwang Ho Kim, Dong Shik Kang, Jung Tae Ok, Su Jeong Heo, Myung Chang Kang
Effects of Co, Ti Interlayer, and Post-annealing on the Adhesion
Property between TiN Coatings and WC-Co Substrate
Dong Shik Kang 1,a, Jung Tae Ok 1,b
, Su Jeong Heo
1,c
, Eun Young Choi1,d,
Myung Chang Kang2,e and Kwang Ho Kim
1,f
1
Division of Materials Science and Engineering, Pusan National University,
Busan 609-735, Korea
2
ERC/NSDM, School of Mechanical Engineering, Pusan National University,
Busan 609-735, Korea
a
dong4440@pusan.ac.kr, bosbon38317@pusan.ac.kr, csjheo@pusan.ac.kr, dceylsyg@hanmail.net ,
e
mckang@pusan.ac.kr, fkwhokim@pusan.ac.kr
Keywords: adhesion, scratch test, interlayer, post-annealing, wc-co
Abstract.
Acknowledgement This work was supported by the Ministry of Science & Technology of Korea (MOST).
Shuster, International Journal of Refractory Metal & Hard Materials, Vol. 17 (1999), p. 163-170
[5] Naoto Kuratani, Yasuo Murakami, Osamu Imai, and Kiyoshi Ogata, Materials Chemistry and Physics., Vol. 54 (1998), p. 313
Acknowledgement This work was supported by the Ministry of Science & Technology of Korea (MOST).
Shuster, International Journal of Refractory Metal & Hard Materials, Vol. 17 (1999), p. 163-170
[5] Naoto Kuratani, Yasuo Murakami, Osamu Imai, and Kiyoshi Ogata, Materials Chemistry and Physics., Vol. 54 (1998), p. 313
Online since: August 2022
Authors: Karna Wijaya, Resty Zama Andiena, Akhmad Syoufian
Nanocatalysts of Sulfated Zirconia and Calcium Oxide/Zirconia for Microwave-Assisted Biodiesel Synthesis from Castor Oil
Resty Zama Andienaa, Karna Wijayab* and Akhmad Syoufianc
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Indonesia
arestyzama95@mail.ugm.ac.id, b*karnawijaya@ugm.ac.id, cakhmadsyoufian@ugm.ac.id
Keywords: Sulfated Zirconia, Calcium/Oxide Zirconia, Microwave, Biodiesel
Abstract.
Experimental Materials Commercial ZrO2 was purchased from Jiaozou Huasu Chemical Co., Ltd China, technical CaO, commercial castor oil was procured from Megah Kimia; methanol, ZrOCl2•8H2O, ammonia and sulfuric acid pro analysis were purchased from Merck.
Instrumentations Synthesis of products and materials were carried out using Microwave Assisted Organic Synthesis (MAOS), analytical balance (KERN ABT 220-4M), oven (Memmert), furnace (Carbolite), centrifuge (Thermo Scientific SL 16R), and hotplate (AS ONE Magnetic Stirrer REXIM RSH- 1D).
Materials and products were characterized using FTIR spectrophotometer (Shimadzu Prestige-21), XRD diffractometer (Bruker D2 Phaser), Scanning Electron Microscope (SEM) (JEOL JSM-6510) -Energy Dispersive X-Ray (EDX) (JED-2300 Analysis Station), surface area analyzer (NOVA Quantachrome Instruments), GC-MS (Shimadzu QP2010S), Bomb Calorimeter model 1341 brand parr and 1H-NMR (JEOL ECP 400).
http://lib3.dss.go.th/fulltext/Journal/J.AOCS/J.AOCS/2000/no.5/may2000vol77, no5,p489-493.pdf [25] Pratama L, Yoeswono, Triyono, Tahir I, Effect of temperature and speed of Stirrer to Biodiesel Conversion from Coconut Oil with The Use of Palm empty fruit bunches as Heterogenous Catalyst, Indo.
Experimental Materials Commercial ZrO2 was purchased from Jiaozou Huasu Chemical Co., Ltd China, technical CaO, commercial castor oil was procured from Megah Kimia; methanol, ZrOCl2•8H2O, ammonia and sulfuric acid pro analysis were purchased from Merck.
Instrumentations Synthesis of products and materials were carried out using Microwave Assisted Organic Synthesis (MAOS), analytical balance (KERN ABT 220-4M), oven (Memmert), furnace (Carbolite), centrifuge (Thermo Scientific SL 16R), and hotplate (AS ONE Magnetic Stirrer REXIM RSH- 1D).
Materials and products were characterized using FTIR spectrophotometer (Shimadzu Prestige-21), XRD diffractometer (Bruker D2 Phaser), Scanning Electron Microscope (SEM) (JEOL JSM-6510) -Energy Dispersive X-Ray (EDX) (JED-2300 Analysis Station), surface area analyzer (NOVA Quantachrome Instruments), GC-MS (Shimadzu QP2010S), Bomb Calorimeter model 1341 brand parr and 1H-NMR (JEOL ECP 400).
http://lib3.dss.go.th/fulltext/Journal/J.AOCS/J.AOCS/2000/no.5/may2000vol77, no5,p489-493.pdf [25] Pratama L, Yoeswono, Triyono, Tahir I, Effect of temperature and speed of Stirrer to Biodiesel Conversion from Coconut Oil with The Use of Palm empty fruit bunches as Heterogenous Catalyst, Indo.
Online since: June 2014
Authors: Bin Ouyang, Zhen Hua Feng, Qing Hua Bi
Calculation and Evaluation Methodology of Transport Energy Consumption and Carbon Emissions: A Case Study of Jiangsu Province
Bin Ouyang1, a, Zhen-Hua Feng2,b and Qing-Hua Bi3,c
1School of Management and Economics, Beijing Institute of Technology, Beijing 100081, China
1China Academy of Transportation Sciences, Beijing 100029, China
2China Academy of Transportation Sciences, Beijing 100029, China
3China Academy of Transportation Sciences, Beijing 100029, China
aoyb_1980@163.com,bfuroo@mail.ustc.edu.cn, cqinghua_bi@126.com
Keywords: transport; energy intensity; energy consumption; carbon dioxide emissions; low carbon.
Among them, the energy consumption and proportion of material handling industry, warehousing, and postal industry is very small (according to the data from National Bureau of Statistics, whole country accounted for 7.73% in 2009).
Science Press, Beijing (2010) [4] F.
Long, Evaluation Model and Optimization Method of Urban Passenger Transport System Based on Carbon Emission Target, Huazhong University of Science & Technology, Wuhan (2012) [8] W.
Journal of Transport Geography, 15 (2007): 354-367
Among them, the energy consumption and proportion of material handling industry, warehousing, and postal industry is very small (according to the data from National Bureau of Statistics, whole country accounted for 7.73% in 2009).
Science Press, Beijing (2010) [4] F.
Long, Evaluation Model and Optimization Method of Urban Passenger Transport System Based on Carbon Emission Target, Huazhong University of Science & Technology, Wuhan (2012) [8] W.
Journal of Transport Geography, 15 (2007): 354-367
Online since: February 2025
Authors: Dominic Kata, Julius Gatune, Innocent Kanana
Materials and Methods
2.1 The Study Site
The study area is in the picturesque Eburru region in Nakuru County, Kenya.
By carefully designing the heat exchanger with a large surface area (A) and using materials with high thermal conductivity, the overall heat transfer coefficient (U) has been maximized.
In Climate change 2021: The physical science basis.
International Journal of Hydrogen Energy, 47(16), 9485-9503
International Journal of Aquaculture, 12(2), 67-78
By carefully designing the heat exchanger with a large surface area (A) and using materials with high thermal conductivity, the overall heat transfer coefficient (U) has been maximized.
In Climate change 2021: The physical science basis.
International Journal of Hydrogen Energy, 47(16), 9485-9503
International Journal of Aquaculture, 12(2), 67-78
Online since: November 2018
Authors: Shu Yuan Ma, Yang Yang Li, Chang Meng Liu, Meng Zhang
Additive manufacturing technology is a manufacturing method by accumulating materials layer by layer.
However, in the process of additive manufacturing, the materials are often accompanied by segregation phenomena and non-equilibrium structure and tends to generate residual stress, which seriously affects the mechanical properties of the as-fabricated materials.
Williams, Perspectives on titanium science and technology, Acta.
Progress on Rapid Solidification Laser Processing for Advanced Materials and Components.
International Journal of Fatigue, 25(9) (2003) 1259-1269
However, in the process of additive manufacturing, the materials are often accompanied by segregation phenomena and non-equilibrium structure and tends to generate residual stress, which seriously affects the mechanical properties of the as-fabricated materials.
Williams, Perspectives on titanium science and technology, Acta.
Progress on Rapid Solidification Laser Processing for Advanced Materials and Components.
International Journal of Fatigue, 25(9) (2003) 1259-1269
Online since: January 2021
Authors: Wei Huang, Bo Wu, Yu Fang Wu
Excavation optimization analysis model
According to the geological survey report, the more-coulomb constitutive model was adopted in the calculation process, and the mechanical indexes of the surrounding rock in the calculation area were shown in Table 2: Material Parameter Table.
Material Parameter Elastic Modulus /GPa Poisson's ratio Cohesive force /MPa Internal friction angle /º Surrounding rock 1.5 0.3 0.45 30 Primary support 36.6 0.2 Second liner 33.5 0.2 Rock bolt 210 0.69 30 In the process of calculation, the Mohr-coulomb model was used to simulate the surrounding rock of the tunnel, the elastic model was used to simulate the initial support concrete, and shell element was used to simulate the secondary lining.
Acknowledgement The authors acknowledge the financial support of the National Science of China (51478118, 51678164), the Guangxi Natural Science Foundation Program (2018GXNSFDA138009), the Guangxi Science and Technology Plan Projects (AD18126011) and the China Scholarship Council.
Journal of Henan University of Science and Technology (Natural Science) 38(04),66-71+119-120 [2] Zeng Shuai. 2019.
China Railway Science 24(5):23~28
Material Parameter Elastic Modulus /GPa Poisson's ratio Cohesive force /MPa Internal friction angle /º Surrounding rock 1.5 0.3 0.45 30 Primary support 36.6 0.2 Second liner 33.5 0.2 Rock bolt 210 0.69 30 In the process of calculation, the Mohr-coulomb model was used to simulate the surrounding rock of the tunnel, the elastic model was used to simulate the initial support concrete, and shell element was used to simulate the secondary lining.
Acknowledgement The authors acknowledge the financial support of the National Science of China (51478118, 51678164), the Guangxi Natural Science Foundation Program (2018GXNSFDA138009), the Guangxi Science and Technology Plan Projects (AD18126011) and the China Scholarship Council.
Journal of Henan University of Science and Technology (Natural Science) 38(04),66-71+119-120 [2] Zeng Shuai. 2019.
China Railway Science 24(5):23~28
Online since: September 2013
Authors: Chun Hong Jia, Li Chen
Degradation and Persistence of Carbofuran in Peanut and Soil in Field Trails as Determined by GC-MS
Li Chen 1,2,a * Chunhong Jia1,2,b
1 Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
2Beijing Research Center for Agrifood Testing and Farmland Monitoring, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
aemail: chenli517@126.com, bemail Email: chjia55@yahoo.com.cn, * Corresponding author
Keywords: Dissipation• Residue• Carbofuran• 3-hydroxy carbofuran• Peanut
Abstract.
Materials and methods Chemicals.
Acknowledgments This study was supported by the National Natural Science Foundation of China (41101482), Beijing Natural Science Foundation(8122021) and Youth Program Beijing Academy of Agricultural and Forestry Science(QN201104).
Yu, C.Q.Yu: Journal of Chengdu University of Technology( Science & Technology Edition, In Chinese). 32(2005) 383-385
Materials and methods Chemicals.
Acknowledgments This study was supported by the National Natural Science Foundation of China (41101482), Beijing Natural Science Foundation(8122021) and Youth Program Beijing Academy of Agricultural and Forestry Science(QN201104).
Yu, C.Q.Yu: Journal of Chengdu University of Technology( Science & Technology Edition, In Chinese). 32(2005) 383-385
Online since: January 2021
Authors: Irina P. Semenova, Marina Smyslova, Konstantin Selivanov, Vil Sitdikov, Roman Valiev
Acknowledgements
This work was supported by the Russian Science Foundation grant No. 19-79-10108.
Langdon, Bulk Nanostructured Materials: Fundamentals and Applications, Wiley, Hoboken, New York, 2014
Fernanda da Silva (Eds.), Materials modification by high-fluence ion beams, Kluwer, Dordrecht, 1989, pp. 3-27
Yasaka, X-ray thin-film measuruments techniques, The Rigaku Journal 26 (2010) 1-9
Smyslov, Deep modification of materials under implantation-plasma treatment.
Langdon, Bulk Nanostructured Materials: Fundamentals and Applications, Wiley, Hoboken, New York, 2014
Fernanda da Silva (Eds.), Materials modification by high-fluence ion beams, Kluwer, Dordrecht, 1989, pp. 3-27
Yasaka, X-ray thin-film measuruments techniques, The Rigaku Journal 26 (2010) 1-9
Smyslov, Deep modification of materials under implantation-plasma treatment.