| 1. |
- Hamngren Blomqvist, Charlotte, 1984, et al.
(författare)
-
Interconnectivity imaged in three dimensions : Nano-particulate silica-hydrogel structure revealed using electron tomography
- 2017
-
Ingår i: Micron. - : Elsevier BV. - 0968-4328 .- 1878-4291. ; 100, s. 91-105
-
Tidskriftsartikel (refereegranskat)abstract
- We have used Electron Tomography (ET) to reveal the detailed three-dimensional structure of particulate hydrogels, a material category common in e.g. controlled release, food science, battery and biomedical applications. A full understanding of the transport properties of these gels requires knowledge about the pore structure and in particular the interconnectivity in three dimensions, since the transport takes the path of lowest resistance. The image series for ET were recorded using High-Angle Annular Dark Field Scanning Transmission Electron Microscopy (HAADF-STEM). We have studied three different particulate silica hydrogels based on primary particles with sizes ranging from 3.6 nm to 22 nm and with pore-size averages from 18 nm to 310 nm. Here, we highlight the nanostructure of the particle network and the interpenetrating pore network in two and three dimensions. The interconnectivity and distribution of width of the porous channels were obtained from the three-dimensional tomography studies while they cannot unambiguously be obtained from the two-dimensional data. Using ET, we compared the interconnectivity and accessible pore volume fraction as a function of pore size, based on direct images on the nanoscale of three different hydrogels. From this comparison, it was clear that the finest of the gels differentiated from the other two. Despite the almost identical flow properties of the two finer gels, they showed large differences concerning the accessible pore volume fraction for probes corresponding to their (two-dimensional) mean pore size. Using 2D pore size data, the finest gel provided an accessible pore volume fraction of over 90%, but for the other two gels the equivalent was only 10–20%. However, all the gels provided an accessible pore volume fraction of 30–40% when taking the third dimension into account.
|
|
| 2. |
- Chronéer, Diana
(författare)
-
Customer-oriented trend in steel and pulp/paper industries : an investigation of the information and communication flow in product development projects
- 1999
-
Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Organization of product development projects is today at focus in many organizations. In process industries, like steel and pulp/paper, process and product development are seen as an integrated part. Product development has often been the result of a process development. Heavy investments and costly production give process a priority role in product development. There are indications in the study that steel and pulp/paper industries are headed towards a more customer-oriented approach in product development projects. Information from both internal functions as marketing and external actors as customers are of importance. However, there is a need of a more systematic approach to handle the communication and information flow in product development projects. Interfaces between R&D, marketing and other functions should be strengthening with suitable integrating mechanism. The thesis consists of a frame of reference and four appended papers. The main work is based on case studies at four companies dealing with steel or paper products.
|
|
| 3. |
|
|
| 4. |
- Hammarlin, Mia-Marie, et al.
(författare)
-
Across all Borders : An Investigation into Radio Activities and the Scandinavian Media Model in 1959
- 2014
-
Konferensbidrag (refereegranskat)abstract
- “Across all borders”: An investigation into media activities and the Scandinavian Media Model in 1959In this case study we are going to investigate two different radio productions that in interesting ways were crossing the geographical borders between the countries Sweden and Norway and between Sweden and Denmark in the year of 1959. Through the concepts of border (see Hurd et al. 2006) showing how identities are defined; and liminality disclosing how they are suspended to make room for negotiations (Turner 1969/1995), we are given the possibility to highlight how radio productions across borders presented a challenge to existing politics and culture. This study will open up new insights in what has been called the Scandinavian Media Model.The year of 1959 saw the advent of cooperation between Swedish and Norwegian radio-monopolies. In a place called Morokulien on the very border, a fictive, mock-kingdom was constructed by the radio-program “Across All Borders”. Morokulien soon became acknowledged also by authorities with it’s elected king, post-office, passports and national emblems. Both the program and the place caught on popularity and lives on even today, although in another form. The location has an interesting prehistory as a site where peace between the two nations was manifested by another type of media – a huge monument from 1914. Here Hannah Arendt’s theory of Space of Appearance (1958) and the influence of Pierre Bourdieu’s Symbolic Violence (1979) can combine media-studies with historical and ethnographic approaches to the phenomenon of place (Frykman 2013). What made the radio show and the place so seamlessly fit into a national discourse?Not far away, at another geographical border, Radio Mercur, the first commercial radio station ever, appeared on international waters in Öresund. The radio station was called pirate radio in the media as it was considered a lawless attack on the monopoly of the Danish National Broadcasting Corporation. It was transmitted from the ship Cheeta Mercur, and was soon to be followed by Radio Syd. The authorities did not know what to do and had, initially, no weapons to stop the "radio pirates", and with the station’s rising popularity in 1959 the offshore-radio was considered a genuine threat to the state-owned radio. Challenging the national broadcasting monopolies (Paulu 1967: 21-25) it was fiercely opposed by first the Danish and later on the Swedish and Norwegian governments. Soon after, in 1962, a “Pirate-Radio”-law - Lex Mercur - was passed trying safeguard against similar enterprises; in the end it failed miserably. Social Democrats with a firm support of the monopoly were in power in all countries at the time. Why was the provocation seen as so politically severe and how was the popular response?The difference between the two cases present excellent opportunities to investigate the role of media in relation to politics and national identities at a particual moment – to say nothing about the Scandinavian Media Model. Still it is possible to reach actors being active in 1959. Theories and methods to be applied in the two cases will draw from media-studies as well as from contemporary ethnographic approaches, in which the team-members are trained and internationally acknowledged.Jonas Frykman, Professor Emeritus in Ethnology with a special competence in Scandinavian culture, national identity and monument research, Lund University.Mia-Marie Hammarlin, Ph.D in Ethnology, Assistant Professor in Journalism, Lund University, and radio- and tv-journalist (10 years of experience at the Swedish Public Service Radio and Television).
|
|
| 5. |
|
|
