| 1. |
- Sullivan, Moira
(författare)
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An anagram of the ideas of filmmaker Maya Deren : creative work in motion pictures
- 1997
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Maya Deren’s corpus of work, which has been given various designations within the American avant-garde filmmaking practice of the 1940’s and 1950’s, will be analysed according to the biographical legend—an approach that focuses on authorship within the historical conditions of conception and reception. Influences on her theories in art and ethnography will be noted through several historical discourses: the French Symbolist Poets, Henri Bergson, Kurt Koffka, T.S Eliot, Katherine Dunham, Alexander Hammid, Marcel Duchamp, Joseph Campbell and Gregory Bateson; the synthesis of these ideas within her films will be made apparent. Three major areas, the poetic, the political and the primitive will be used as components of an anagrammatic complex to demonstrate the theory and practice of her work as an artist in flux between dominant representational practices in film and ethnography. Her major theoretical essay, An Anagram of Ideas on Art, Form and Film will introduce the basic structure of her ideas. An analysis of six completed films and work i n progress will be approached through a ‘genetic tracing’ of shooting scripts, releases and historical contexualizations. Work with choreocinema and ritual will be examined as an epistemological break in film form within the avant garde. The Poetic contextualizes key influences behind her use of the poetic idiom in film; the Political examines Deren’s production, distribution, exhibition and articulation of film in periodicals and lecturedemonstrations; The Primitive focuses on Deren’s literal and visual contributions to an understanding of Haitian Voudoun including her participant-observation in a Port-au-Prince hounfor (temple).
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| 2. |
- Hosseininia, Shahrzad, et al.
(författare)
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Targeted proteomics of hip articular cartilage in OA and fracture patients
- 2019
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Ingår i: Journal of Orthopaedic Research. - : Wiley. - 0736-0266 .- 1554-527X. ; 37:1, s. 131-135
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Tidskriftsartikel (refereegranskat)abstract
- Osteoarthritis (OA) is a common chronic disease, causing joint pain and reduced physical function. OA progresses slowly over a period of several years; to avoid an exacerbation of symptoms, it is critical to able to diagnose the disease as early as possible. The identification of disease-specific biomarkers may enable such an early diagnosis. The aim of this study was to investigate potential biomarkers of cartilage metabolism in OA using a targeted multiplex approach by single reaction monitoring. Intact looking cartilage of femoral heads from patients with OA (n = 9) or femoral neck fractures (n = 12) was examined. Variations and relative quantifications of 35 selected extracellular matrix (ECM) proteins were analyzed using nano-LC coupled to tandem mass spectrometry. Our study showed statistically significantly increased levels of asporin (ASPN), mimecan (MIME), matrilin-3 (MATN3), cartilage intermediate layer protein 2 (CILP-2), collagen VI, collagen II, and collagen III N-propeptide in OA cartilage compared with non-OA cartilage. The other proteins in the protein panel did not appear to be different between the two groups. In conclusion, we identified a number of cartilage matrix proteins which may represent early molecular changes in the OA process and may have potential to predict the development of OA.
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| 3. |
- Hosseinnia, Ali, et al.
(författare)
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Ethane thermometry using rotational coherent anti-Stokes Raman scattering (CARS)
- 2017
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Ingår i: Proceedings of the Combustion Institute. - : Elsevier BV. - 1540-7489. ; 36:3, s. 4461-4468
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Tidskriftsartikel (refereegranskat)abstract
- The complete rotational CARS (coherent anti-Stokes Raman scattering) spectrum of ethane (C2H6) has for the first time been recorded instantaneously under high spectral resolution, and the potential for thermometry has been investigated. Experiments were performed in the temperature range 292-650K in pure ethane and in binary mixtures with nitrogen. A polarization technique was used to suppress the non-resonant contribution to the CARS signal. The ethane RCARS spectra show both S- and R-branch lines, which are more closely spaced than for the well-known nitrogen spectrum and located at much smaller Raman shifts. The peak signal strength was found to be around 240 times lower for ethane than for nitrogen (at 292K). Two main approaches for ethane thermometry are evaluated, which both show high potential. The first is a method in which a spectrum with unknown temperature is fitted using a library of experimental spectra recorded at various temperatures. The second is a method based on ratios of integrated signals in different spectral regions. A theoretical model for simulation of theoretical spectra is under development.
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| 4. |
- Hosseinnia, Ali
(författare)
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On the Use of Rotational CARS on Polyatomics and in Time Domain
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis work concerns the further developments of dual-broadband rotational coherent anti-Stokes Raman spectroscopy (RCARS) through experimental and theoretical investigations. Rotational CARS is an established technique for gas-phase thermometry and concentration measurement with major applications in combustion diagnostics. The technique has previously mainly been applied on species with linear molecular symmetry, for which the calculations of their spectra are relatively straightforward.The developments in the present thesis can be divided in two main categories. The first part of the thesis deals with the extension of nanosecond (ns) RCARS diagnostics towards two hydrocarbon fuels with complex molecular symmetries. The first is the symmetric-top molecule ethane (C2H6), and the second is the asymmetric top ethylene (C2H4).In the ethane case, RCARS spectra were recorded in pure ethane, as well as in different mixtures of ethane/nitrogen (N2), at atmospheric pressure and at temperatures between 300 K and 650 K. It was demonstrated that the rigid-rotor assumption was not accurate for successful calculations of the ethane spectra at the higher temperatures, and that the effects of internal rotation should be taken into account. A novel method based on Fourier analysis was developed for evaluation of RCARS spectra of ethane for thermometry and for concentration measurements in binary mixtures with nitrogen. The method was successfully demonstrated for thermometry and concentration measurements in an ethane diffusion flame.RCARS spectra of ethylene were recorded at atmospheric pressure and temperatures between 300 K and 800 K. A theoretical model was developed that could reproduce spectra in good agreement with the experimentally recorded data. Furthermore, linewidth parameters of ethylene were estimated for the first time through comparison of the experimental and theoretically calculated spectra.In the second part of the thesis, a novel technique was developed for time-domain studies of molecular coherences using femtosecond (fs)/ns RCARS. All the rotational Raman coherences of molecular species were prepared by two Fourier-limited fs pulses and probed by a single-mode ns pulse. The generated CARS signal was dispersed in a spectrometer and recorded by a streak camera. This combination resulted in simultaneous resolving of the coherences in spectral and temporal domain. Through this novel approach we demonstrated single-shot Raman linewidth measurements of N2 in mixtures with C2H4 and C2H6. Moreover, a theoretical model for time-resolved RCARS of N2 was developed that exploits the measured Raman linewidth data for single-shot thermometry using spectral fitting. This is an essential improvement in N2 RCARS thermometry, since it removes the limitations regarding the necessary pre-knowledge about the number density of the species in the mixtures and their impact on N2 linewidths.
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| 5. |
- Koo, SM, et al.
(författare)
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Influence of trenching effect on the characteristics of buried-gate SiC junction field-effect transistors
- 2002
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Ingår i: Materials Science Forum, Vols. 389-393. ; , s. 1235-1238
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Konferensbidrag (refereegranskat)abstract
- Two different structures of junction field-effect transistors in 4H-SiC, with and without trenching effect in the channel region, have been fabricated and characterized. The devices formed with metal mask show a trenching profile (>similar to0.2 mum) after dry etch in the channel groove region and exhibited static induction transistor (SIT)-like characteristics in the sub-threshold region of I-V curves as the channel thickness decreases. The devices without trenching effect have been processed by using a wet-etched oxide mask resulting in a sloped dry-etch profile (theta=similar to30degrees) in the channel, and consequently showed well-saturated drain characteristics for all the channel thicknesses. The conduction mechanisms in these JFETs are examined by the potential profiles from two dimensional numerical simulations.
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| 6. |
- Rey, Marcel, 1989, et al.
(författare)
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Interactions between interfaces dictate stimuli-responsive emulsion behaviour
- 2023
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Ingår i: NATURE COMMUNICATIONS. - 2041-1723. ; 14:1
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Tidskriftsartikel (refereegranskat)abstract
- Stimuli-responsive emulsions offer a dual advantage, combining long-term storage with controlled release triggered by external cues such as pH or temperature changes. This study establishes that thermo-responsive emulsion behaviour is primarily determined by interactions between, rather than within, interfaces. Consequently, the stability of these emulsions is intricately tied to the nature of the stabilizing microgel particles - whether they are more polymeric or colloidal, and the morphology they assume at the liquid interface. The colloidal properties of the microgels provide the foundation for the long-term stability of Pickering emulsions. However, limited deformability can lead to non-responsive emulsions. Conversely, the polymeric properties of the microgels enable them to spread and flatten at the liquid interface, enabling stimuli-responsive behaviour. Furthermore, microgels shared between two emulsion droplets in flocculated emulsions facilitate stimuli-responsiveness, regardless of their internal architecture. This underscores the pivotal role of microgel morphology and the forces they exert on liquid interfaces in the control and design of stimuli-responsive emulsions and interfaces. Stimuli-responsive emulsions are useful for long-term storage combined with controlled release, but the fundamental mechanism behind this release is not established. Here, the authors report a study into the effect of individual microgel morphology on the destabilisation of responsive emulsions.
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