Browse Titles - 4266 results
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Accident on 25 July 2000 at La Patte d'Oie in Gonesse (95) to the Concorde Registered F-BTSC Operated By Air France: Preliminary Report
written by Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile (Paris, Ile-de-France: Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile, 2000, originally published 2000), 64 page(s)
This is the preliminary report released by the BEA (the French aviation authority) following the crash of Air France Flight 4590.
Sample
written by Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile (Paris, Ile-de-France: Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile, 2000, originally published 2000), 64 page(s)
Description
This is the preliminary report released by the BEA (the French aviation authority) following the crash of Air France Flight 4590.
Field of Study
Global Issues
Content Type
Accident report
Author / Creator
Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile
Date Published / Released
2000-09-15, 2000
Publisher
Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile
Topic / Theme
Air France Flight 4590, Airplanes, Aerospace engineering, Aircraft accidents, Engineering
Copyright Message
Copyright © 2000 by Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile
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Accounting Model of CO2 and its Application in Integrated Iron and Steel Enterprises
(Switzerland: Trans Tech Publications, 2015), 15 page(s)
Integrated iron and steel enterprises is taken as the research object. Under the guidance of GHG Protocol standards for carbon emissions, the carbon dioxide accounting models on the process as a whole boundary are established, in which, the carbon emissions inventory is divided into three levels and the input data...
Sample
(Switzerland: Trans Tech Publications, 2015), 15 page(s)
Description
Integrated iron and steel enterprises is taken as the research object. Under the guidance of GHG Protocol standards for carbon emissions, the carbon dioxide accounting models on the process as a whole boundary are established, in which, the carbon emissions inventory is divided into three levels and the input data consists of CO2 emission coefficient and activity factor level data. The process model is the accounting model that the carbon emissio...
Integrated iron and steel enterprises is taken as the research object. Under the guidance of GHG Protocol standards for carbon emissions, the carbon dioxide accounting models on the process as a whole boundary are established, in which, the carbon emissions inventory is divided into three levels and the input data consists of CO2 emission coefficient and activity factor level data. The process model is the accounting model that the carbon emission is obtained through the balance of carbon input and carbon output outside the process boundary under the condition of considering the enterprise circulation. This article also researched one integrated iron and steel enterprise as a case. The results show that the model can quantify the emissions of different processes, provide basic value for the enterprise reduction, Identify major carbon source, identify the influence on carbon emissions by the changes of fuel structure, the structure of the process parameters and outsourcing by-product internal circulation. Therefore the model results can be used in the carbon emissions of enterprise internal assessment and decision-making.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2015-03, 2015
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2015 Trans Tech Publications Ltd.
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Accuracy and Material Properties in Incremental Forming for a Multi-Step Expanding Approach
(Switzerland: Trans Tech Publications, 2015), 10 page(s)
In incremental sheet forming the material properties change dependent on the wall angle. In addition to sheet thinning, material hardening can be observed and for stainless steel the formation of strain induced martensite has been reported. These process characteristics have been extensively examined for the formi...
Sample
(Switzerland: Trans Tech Publications, 2015), 10 page(s)
Description
In incremental sheet forming the material properties change dependent on the wall angle. In addition to sheet thinning, material hardening can be observed and for stainless steel the formation of strain induced martensite has been reported. These process characteristics have been extensively examined for the forming of parts in one step. In this study, a first investigation is made to control the material properties independent on the wall angle...
In incremental sheet forming the material properties change dependent on the wall angle. In addition to sheet thinning, material hardening can be observed and for stainless steel the formation of strain induced martensite has been reported. These process characteristics have been extensively examined for the forming of parts in one step. In this study, a first investigation is made to control the material properties independent on the wall angle by a multi-step expanding approach. For this, in the first step a steep wall angle is formed and in the following steps this region is transformed to a shallow wall angle, keeping the material properties. To demonstrate and verify this new approach a small cone frustum with a wall angle of 60° was formed as a preform. This cone frustum was repeatedly expanded in steps of 2° to get finally a cone frustum with 30° wall angle. The stepwise expanding causes a considerably growing of the shape in depth direction, especially at the preformed area. By a heuristic approach the geometric accuracy of the final cone was optimized. The microhardness measurement of the formed cones shows that the final cone frustum has a region, where the material properties are similar to the first formed 60° wall angle. By this new approach the possibility to influence the material properties of the final part purely by tool path is demonstrated. In particular it is possible to form regions with shallow wall angles that have the material properties of regions with steep wall angles.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2015-03, 2015
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2015 Trans Tech Publications Ltd.
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Accurate and Traceable Calibration of the Stiffness of Various AFM Cantilevers
(Switzerland: Trans Tech Publications, 2015), 10 page(s)
Atomic force microscope (AFM) is widely used to measure nanoforce in the analysis of nanomechanical and biomechanical properties. As the critical factor in the nanoforce measurement, the stiffness of the AFM cantilever must be determined properly. In this paper, an accurate and SI-traceable calibration method is p...
Sample
(Switzerland: Trans Tech Publications, 2015), 10 page(s)
Description
Atomic force microscope (AFM) is widely used to measure nanoforce in the analysis of nanomechanical and biomechanical properties. As the critical factor in the nanoforce measurement, the stiffness of the AFM cantilever must be determined properly. In this paper, an accurate and SI-traceable calibration method is presented to obtain the stiffness of the AFM cantilever in the normal direction. The calibration system consists of a homemade AFM head...
Atomic force microscope (AFM) is widely used to measure nanoforce in the analysis of nanomechanical and biomechanical properties. As the critical factor in the nanoforce measurement, the stiffness of the AFM cantilever must be determined properly. In this paper, an accurate and SI-traceable calibration method is presented to obtain the stiffness of the AFM cantilever in the normal direction. The calibration system consists of a homemade AFM head and an ultra-precision electromagnetic balance. The calibration is based on the Hooke's law i.e. the stiffness is equal to the force divided by the deflection of the cantilever. With this system, three kinds of cantilevers were calibrated. The relative standard deviation is better than 1%. The results of these experiments showed good accuracy and repeatability.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2015-05, 2015
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2015 Trans Tech Publications Ltd.
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Achieving Concrete Durability in Chloride Exposures
(Switzerland: Trans Tech Publications, 2016), 9 page(s)
Obtaining durability in concrete structures over a long service life in chloride exposures requires knowledge of the concrete properties, relevant transport processes, depths of cover as well as minimization of cracking and construction defects. For example, imperfect curing can result in depth-dependent effects o...
Sample
(Switzerland: Trans Tech Publications, 2016), 9 page(s)
Description
Obtaining durability in concrete structures over a long service life in chloride exposures requires knowledge of the concrete properties, relevant transport processes, depths of cover as well as minimization of cracking and construction defects. For example, imperfect curing can result in depth-dependent effects of the concrete cover's resistance to chloride ingress. Several service life models with various levels of sophistication exist for pred...
Obtaining durability in concrete structures over a long service life in chloride exposures requires knowledge of the concrete properties, relevant transport processes, depths of cover as well as minimization of cracking and construction defects. For example, imperfect curing can result in depth-dependent effects of the concrete cover's resistance to chloride ingress. Several service life models with various levels of sophistication exist for prediction of time-to-corrosion of concrete structures exposed to chlorides. The model inputs have uncertainty associated with them such as boundary conditions (level of saturation and temperature), cover depths, diffusion coefficients, time-dependent changes, and rates of buildup of chlorides at the surface. The performance test methods used to obtain predictive model inputs as well as how models handle these properties have a dramatic impact on predicted service lives. Very few models deal with the influence of cracks or the fact that concrete in the cover zone will almost certainly have a higher diffusion coefficient than the bulk concrete as the result of imperfect curing or compaction. While many models account for variability in input properties, they will never be able to account for extremes in construction defects. Therefore, to ensure the reliability of service life predictions and to attain a concrete structure that achieves its predicted potential, designers, contractors and suppliers need to work together, using proper inspection, to ensure proper detailing, minimize defects, and adopt adequate, yet achievable, curing procedures. As well, concrete structures are often exposed to other destructive elements in addition to chlorides (eg. freezing or ASR) and this adds another level of complexity since regardless of cause, cracks will accelerate the ingress of chlorides. These issues are discussed along with the need to use performance-based specifications together with predictive models.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2016-09, 2016
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2016 Trans Tech Publications Ltd.
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Acid-Base Properties of the Surface SnO
(Switzerland: Trans Tech Publications, 2015), 9 page(s)
The article demonstrates how acid-base properties of the surface of tin (II) oxide powders influence its photocatalytic activity in reaction of photodegradation of methylene blue. The experiment shows that the photocatalytic activity of the tin (II) oxide depends on the number and the strength of surface acid cent...
Sample
(Switzerland: Trans Tech Publications, 2015), 9 page(s)
Description
The article demonstrates how acid-base properties of the surface of tin (II) oxide powders influence its photocatalytic activity in reaction of photodegradation of methylene blue. The experiment shows that the photocatalytic activity of the tin (II) oxide depends on the number and the strength of surface acid centers of the Lewis.
Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2015-10, 2015
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2015 Trans Tech Publications Ltd.
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Acoustic Benefits of Ecofriendly Spent Tea Leaves Filled Porous Material
(Switzerland: Trans Tech Publications, 2017), 11 page(s)
This paper demonstrates the feasibility of spent tea leaf (STL) fiber as an eco-friendly sound absorbing material. STL fiber is a by-product which was extracted from tea plant. STL are rich in polyphenols (tannins) which cause high resistance to fungal and termites, and high resistance to fire. In addition, STL ar...
Sample
(Switzerland: Trans Tech Publications, 2017), 11 page(s)
Description
This paper demonstrates the feasibility of spent tea leaf (STL) fiber as an eco-friendly sound absorbing material. STL fiber is a by-product which was extracted from tea plant. STL are rich in polyphenols (tannins) which cause high resistance to fungal and termites, and high resistance to fire. In addition, STL are hollow and cellular in nature and thus perform well as acoustic and thermal insulators. Three different grades of STL were studied an...
This paper demonstrates the feasibility of spent tea leaf (STL) fiber as an eco-friendly sound absorbing material. STL fiber is a by-product which was extracted from tea plant. STL are rich in polyphenols (tannins) which cause high resistance to fungal and termites, and high resistance to fire. In addition, STL are hollow and cellular in nature and thus perform well as acoustic and thermal insulators. Three different grades of STL were studied and the acoustic property was analyzed in terms of sound absorption coefficient and transmission loss. Experimental measurements of sound absorption coefficient in impedance tube are conducted. It was found that finest STL fiber grade exhibits better acoustic performance among others. Furthermore, the effect of latex binder on the acoustic property of STL fiber was also analyzed. Results suggest that the types of binder such as polyurethane and latex influenced the acoustic performance of STL fiber.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2017-06, 2017
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2017 Trans Tech Publications Ltd.
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Acting on Warning Signs
written by Futuremedia (Sydney, New South Wales: Futuremedia, 2013), 20 mins
Professor Andrew Hopkins, a world-renowned expert in industrial accident analysis, outlines the characteristics of high-reliability organizations and why the 'culture of denial' prevents many organizations from acting on warning signs.
Sample
written by Futuremedia (Sydney, New South Wales: Futuremedia, 2013), 20 mins
Description
Professor Andrew Hopkins, a world-renowned expert in industrial accident analysis, outlines the characteristics of high-reliability organizations and why the 'culture of denial' prevents many organizations from acting on warning signs.
Field of Study
Global Issues
Content Type
Documentary
Contributor
Andrew Hopkins
Author / Creator
Futuremedia
Date Published / Released
2013
Publisher
Futuremedia
Speaker / Narrator
Andrew Hopkins
Topic / Theme
Nuclear engineering, Chemical engineering, Associations and organizations, Engineering
Copyright Message
Copyright © 2013 by Futuremedia Training Resources
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Action on Crane Runway Caused by Horizontal Forces due to Crane Skewing
(Switzerland: Trans Tech Publications, 2015), 11 page(s)
Determination of the (residual) lifetime of steel structures of construction, mining and maintenance machines has recently received increased attention, particularly for safety, environmental and economic reasons. One of the problems that are addressed in this context is crane skewing, a phenomenon that directly a...
Sample
(Switzerland: Trans Tech Publications, 2015), 11 page(s)
Description
Determination of the (residual) lifetime of steel structures of construction, mining and maintenance machines has recently received increased attention, particularly for safety, environmental and economic reasons. One of the problems that are addressed in this context is crane skewing, a phenomenon that directly affects, through friction and wear, the life of the crane guiding structure, and indirectly affects the secondary life of the crane supp...
Determination of the (residual) lifetime of steel structures of construction, mining and maintenance machines has recently received increased attention, particularly for safety, environmental and economic reasons. One of the problems that are addressed in this context is crane skewing, a phenomenon that directly affects, through friction and wear, the life of the crane guiding structure, and indirectly affects the secondary life of the crane supporting structure.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2015-10, 2015
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2015 Trans Tech Publications Ltd.
×
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Activity and Deactivation of ZSM-5 Catalysts in the Dimethyl Ether Synthesis from CO and H2 and Methanol Dehydration
(Switzerland: Trans Tech Publications, 2016), 11 page(s)
The increasing demand for producing dimethyl ether from synthesis gas explains the renewed interest in studying the activity and stability of catalysts. In the present work, resource catalytic testing of ZSM-5 zeolites was carried out in the one-step synthesis of dimethyl ether from synthesis gas for 120 hours. Fo...
Sample
(Switzerland: Trans Tech Publications, 2016), 11 page(s)
Description
The increasing demand for producing dimethyl ether from synthesis gas explains the renewed interest in studying the activity and stability of catalysts. In the present work, resource catalytic testing of ZSM-5 zeolites was carried out in the one-step synthesis of dimethyl ether from synthesis gas for 120 hours. Formation of condensation products was observed on zeolite surface after catalytic tests which leads to lower catalytic activity of sampl...
The increasing demand for producing dimethyl ether from synthesis gas explains the renewed interest in studying the activity and stability of catalysts. In the present work, resource catalytic testing of ZSM-5 zeolites was carried out in the one-step synthesis of dimethyl ether from synthesis gas for 120 hours. Formation of condensation products was observed on zeolite surface after catalytic tests which leads to lower catalytic activity of samples. Condensation products were investigated by thermal analysis in an oxidizing atmosphere. Textural characteristics of zeolites before and after reaction were investigated. It was shown that methanol significantly contribute to formation of condensation products on the catalyst surface in the process of dimethyl ether production.
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Field of Study
Global Issues
Content Type
Periodical article
Date Published / Released
2016-02, 2016
Publisher
Trans Tech Publications
Topic / Theme
Engineering
Copyright Message
Copyright © 2016 Trans Tech Publications Ltd.
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