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- Eivazihollagh, Alireza, et al.
(författare)
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On chelating surfactants : Molecular perspectives and application prospects
- 2019
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Ingår i: Journal of Molecular Liquids. - : Elsevier BV. - 0167-7322 .- 1873-3166. ; 278, s. 688-705
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Tidskriftsartikel (refereegranskat)abstract
- Chelating agents, molecules that very strongly coordinates certain metal ions, are used industrially as well as in consumer products to minimize disturbances and increase performance of reactions and applications. The widely used sequestering agents, nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) belong to this branch of readily water-soluble compounds. When these chemical structures also have hydrophobic parts, they are prone to adsorb at air-water interfaces and to self-assemble. Such bifunctional molecules can be called chelating surfactants and will have more extended utilization prospects than common chelating agents or ordinary ionic surfactants. The present review attempts to highlight the fundamental behavior of chelating surfactants in solution and at interfaces, and their very specific interactions with metal ions. Methods to recover chelating surfactants from metal chelates are also described. Moreover, utilization of chelating surfactants in applications for metal removal in environmental engineering and mineral processing, as well as for metal control in the fields of biology, chemistry and physics, is exemplified and discussed.
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| 5. |
- Landqvist, Hans, 1958, et al.
(författare)
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Intresse och engagemang: Kungliga Tekniska högskolans insatser i ett svenskt terminologiskt nätverk 1941–1983 : Interest and involvement: the contributions of the Royal Institute of Technology to a Swedish terminological network 1941–1983
- 2021
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Ingår i: Folkmålsstudier Meddelanden från Föreningen för nordisk filologi. - 0356-1771. ; 59, s. 103-133
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we study how KTH Royal Institute of Technology (Kungliga Tekniska högskolan – KTH) has participated in and influenced terminology work coordinated by the national terminology centre, the Swedish Centre for Technical Terminology – the TNC, in Sweden during the period 1941–1983. The aim of this paper is to shed light on the development of Swedish (technical) terminology based on networking and experts’ efforts. Based on archive material, we analyze who have been the active KTH experts, in what ways they were involved in the development processes and what effects their efforts had on the term recommendations given by the TNC. The archive material consists of written documents relating to the work process developed by John Wennerberg, who led the TNC between 1941 and 1957. The process was carried out in the form of 373 formal survey letters representing 17 subject fields, with both the TNC and external parties participating. Our results show that the 31 identified KTH experts play a visible role in the processes by 480 received survey letters within 14 subject fields. The response rate, 80 percent, reveal the experts’ involvement in the process and their high esteem of TNC’s work. The analysis of the comprehensive survey letter R198 shows that Wennerberg has considered the experts’ answers regarding terms (selection, linguistic form, acceptance/discourage) and definitions when he has published TNC’s recommendations. Our study shows that networking and experts representing the educational sector and furthermore universities have been an inseparable part of the development of Swedish (technical) terminology during several decades when the national terminology centre in Sweden began to operate and the working methods were established.
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| 6. |
- Nissilä, Niina, et al.
(författare)
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”Av intresse för saken dristar jag mig att till diskussion framlägga ett par spörsmål” – Kaksi suomalaista akateemista uranuurtajaa terminologiaverkoston kirjeenvaihdossa
- 2021
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Ingår i: Workplace Communication IV (VAKKI Publications 13.) Eds H. Katajamäki, M. Enell-Nilsson, H. Kauppinen-Räisänen, L. Kääntä & H. Salovaara. - 2242-6841 .- 2242-685X. ; 13
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Tidskriftsartikel (refereegranskat)abstract
- The Swedish Tekniska Nomenklaturcentralen TNC (2000–2018 Terminologicentrum TNC) has been Sweden's national center for special languages and terminology work for more than 75 years. Since its founding in 1941, the TNC has been active not only in Sweden, but also in establishing and maintaining international contacts. The article describes the contacts between actors in the Swedish and Finnish terminology field, looking in particular at the contacts between the TNC and actors in the Finnish higher education sector between the 1940s and the 1990s. The method utilized is close reading and content analysis. The research material used is the collection of foreign correspondence in the TNC's document archive, and in particular the section stored in connection with the code Ufin, i.e. sections concerning communication between the TNC and Finnish actors. The article describes the topics covered in the communication, the objectives and consequences of the communication and the results achieved. The article focuses especially on the contacts between the TNC and two active actors in Finland, professor Jarl Salin at the Åbo Akademi University and professor Christer Laurén at the University of Vaasa. In the analysis, the Ufin themes of the letters were categorized in four main categories: publications, communication, information and language issues. In professor Jarl Salins letters, the most common theme were language issues, whereas Professor Christer Laurén contacted TNC especially in connection with publications and publishing.
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| 7. |
- Pilke, Nina, et al.
(författare)
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Organising Terminology Work in Sweden from the 1940s onwards – Participatory Expert Roles in Networks
- 2021
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Ingår i: Terminology as a Societal Resource. Possibilities and Responsibilities in a Changing World. Special Issue of Terminology International Journal of Theoretical and Applied Issues in Specialized Communication. - : John Benjamins Publishing Company. - 0929-9971 .- 1569-9994. ; 27:1, s. 80-109
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Tidskriftsartikel (refereegranskat)abstract
- The present study deals with organised terminology work in Sweden from the 1940s to the late 2010s. Using archive material, we describe how practical terminology work was carried out in Sweden during the period 1941–2018/ 2019, when the Swedish Centre for Technical Terminology/the Swedish Centre for Terminology (TNC) was the central actor. Thereafter, we discuss models for building a new infrastructure for terminology work after the clo- sure of the TNC in 2018/2019. This discussion is based on interviews and analyses of articles and current reports. The study shows that multifaceted contacts with experts, academia, industry and society have played an essen- tial role for terminology work in Sweden since the 1930s. In the current situ- ation (2019), the activities are being reorganised and responsibility for terminology work is distributed between several actors. A new main actor is the government agency known as the Institute of Language and Folklore (Isof ). Finally, we discuss future visions for terminology work in Sweden.
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- Mathern, Alexandre, 1986, et al.
(författare)
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Concrete Support Structures for Offshore Wind Turbines: Current Status, Challenges, and Future Trends
- 2021
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Ingår i: Energies. - : MDPI AG. - 1996-1073 .- 1996-1073. ; 14:7
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Forskningsöversikt (refereegranskat)abstract
- Today’s offshore wind turbine support structures market is largely dominated by steel structures, since steel monopiles account for the vast majority of installations in the last decade and new types of multi-leg steel structures have been developed in recent years. However, as wind turbines become bigger, and potential sites for offshore wind farms are located in ever deeper waters and ever further from the shore, the conditions for the design, transport, and installation of support structures are changing. In light of these facts, this paper identifies and categorizes the challenges and future trends related to the use of concrete for support structures of future offshore wind projects. To do so, recent advances and technologies still under development for both bottom-fixed and floating concrete support structures have been reviewed. It was found that these new developments meet the challenges associated with the use of concrete support structures, as they will allow the production costs to be lowered and transport and installation to be facilitated. New technologies for concrete support structures used at medium and great water depths are also being developed and are expected to become more common in future offshore wind installations. Therefore, the new developments identified in this paper show the likelihood of an increase in the use of concrete support structures in future offshore wind farms. These developments also indicate that the complexity of future support structures will increase due to the development of hybrid structures combining steel and concrete. These evolutions call for new knowledge and technical know-how in order to allow reliable structures to be built and risk-free offshore installation to be executed.
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| 10. |
- Okda, Sherif, et al.
(författare)
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Testing of the Aerodynamic Characteristics of an Inflatable Airfoil Section
- 2020
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Ingår i: Journal of Aerospace Engineering. - 1943-5525 .- 0893-1321. ; 33:5
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Tidskriftsartikel (refereegranskat)abstract
- Inflatable structures are characterized by being light and easy to manufacture and deploy. Hence, they find many applications in aerospace and aeronautical engineering. In this paper, an inflatable segment with a The National Advisory Committee for Aeronautics (NACA) 0021 airfoil cross-section is designed, fabricated, and tested. The geometrical accuracy of the manufactured inflatable segment is measured using laser scanning. Measurements show that the average normalized error of the chord length and thickness are 2.97% and 0.554%, respectively. The aerodynamic behavior of the inflatable segment is then tested in a wind tunnel at different wind speeds and angles of attack. Lift forces are measured using a six-component balance, while the drag forces are calculated from the wake measurements. The lift and drag coefficients of the inflatable section are compared to those of a standard NACA 0021 airfoil. Finally, flow visualization is examined at different angles of attack using two methods: smoke and tufts. Both methods show that flow separation starts at 15° and full stall occurs at 25°. Results indicate that inflatables can find more applications in the design and construction of aerodynamic structures, such as wings.
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