| 1. |
- Arnadottir, Anna, et al.
(författare)
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Universums mörka hemlighet
- 2018
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- Here we follow the exciting exploration of dark matter, from the Big Bang to its anticipated discovery at the Large Hadron Collider. The first hints of dark matter were wound by Fritz Zwicky, the scientist who coined the term. We get to see the astral choreography witnessed by Vera Rubin in the Andromeda galaxy and then plummet deep underground to see the most sensitive dark matter detector on Earth, housed in a former gold mine.From there, we journey across space and time to the Large Hadron Collider at CERN, speeding alongside particles before they collide in visually stunning explosions of light and sound, while learning how scientists around the world are collaborating to track down the constituents of dark matter.
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| 2. |
- Posch, Josefina
(författare)
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EP9 Starlight Reserves
- 2023
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Ingår i: Göteborgs Botaniska Trädgård, GIBCA Extended, 2023-08-19.
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- The sculpture EP9 Starlight Reserves was installed in Amerikadammen in Göteborgs Botaniska Trädgård and part of GIBCA Extended 2023. This work is situated in the expanded field of sculpture, where the negotiation with a specific situation plays a central role in material investigations of environmental and sustainability concerns. The shape and title of the sculpture derive from the container of old batteries, "Exposed Pallet 9," which the International Space Station launched into space in 2021 to circulate around the Earth for 2-4 years before entering the Earth's atmosphere and hopefully burn up. [1] Commercial interests, colonization, and tourism led by rich nations and private companies contribute to the increase of space debris. The main inquiry of this research project is how artistic work, through visualization in sculptural form, can draw attention to scientific observations and advocacy in establishing international environmental space law concerning space debris. By using recycled plastic from electronic scrap for the large-scale IRBAM printing of the sculpture, the work highlights the potential for sustainable and ephemeral materials in sculptural production to promote environmental awareness and question the validity of the standard requirement for "permanence" in public sculpture. 3D printing in collaboration with Samuel Johansson and Woodrow Wiest RISE – AM center in Mölndal, Sweden with in-kind funding. Supported by Göteborgs Stad Kultur och Göteborgs Botaniska Trädgård. [1] Mike Wall, “Space station tosses 2.9-ton hunk of space junk overboard. It will stay in orbit for years.”, space.com, accessed January 3, 2024, https://www.space.com/space-station-jettisons-huge-space-junk-pallet
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| 3. |
- Arnadottir, Anna, et al.
(författare)
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Människor på Månen : Månar och mindre himlakroppar
- 2019
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- As we look up at night we see that our Earth has one moon orbiting it, the one we call the Moon. We have explored our moon with orbiters, rovers and astronauts, mapping it and studying its history.Other planets also have moons in orbit around them and these may look quite different from the Earth's moon. Some are small and look like asteroids, others are so icy they would become comets if they plunged on an elliptical orbit towards the inner solar system. This full dome planetarium production; "Man on the Moon" is a part of a series titled "Moons Beyond Counting". In this installment we look closer at NASA's Apollo missions and some more recent missions to the Moon.
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| 4. |
- Posch, Josefina
(författare)
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[Prussian] BLUESHIFT – Space Debris 2551
- 2022
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Ingår i: Stora Alvaret, Öland, Sweden, The Swedish Sculptors´ Association, 2022-06-11.
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- The sculpture [Prussian] BLUESHIFT - Space Debris 2551 takes its shape from the satellite Cosmos 2551. One of the biggest fragmentation events in space took place in 2009 when the abandoned satellite Cosmos 2251 and Iridium 33 collided, leading to the destruction of both satellites. To this day, over 1000 catalogued space debris objects from the collision circulate around the Earth and one of the orbits passes right over Öland. When an object in space moves towards us, the light from the object is called blueshift, which describes the change in the frequency of a light wave. The color of the sculpture is Prussian blue, which is on the World Health Organisation's list of essential medicines and is used as an antidote to certain heavy metals and radioactivity. The artistic research work questions ownership and responsibility for the pollution caused by colonisation and space tourism. Led by wealthy nations and private companies, this reflects the colonisation of the Earth whose negative impact on the environment and cultures we have yet to come to terms with. The sculpture is mostly created from recycled material from discarded student projects from the HDK-Valand art school and the Gothenburg Opera's metal textiles set design from the climate-smart production of The Ring of the Nibelung.
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| 5. |
- Arnadottir, Anna, et al.
(författare)
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Allt som ögat ser
- 2017
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- Follow the journey of a single photon as it is produced in a distant star, before travelling across the vast expanse of space to land on someone's retina.This fulldome planetarium show explores some of the fascinating processes of the cosmos, from astrophysics to the biology of the eye and brain.
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| 6. |
- Posch, Josefina
(författare)
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”Sipping Cosmic Latte in the Milky Way, waiting for The Big Crunch” and ”We are taking great pains to make sure there’s not an orbital debris issue”
- 2022
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Ingår i: Rovaniemi Finland, Arktikum Science Centre and Museum, 2022-12-02.
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- The two sculptures in the exhibition encompasses, discarded materials from the Arktikum Science Centre, the HDK-Valand Academy of Art and Design workshops and the Gothenburg Opera. The sculpture ”We are taking great pains to make sure there’s not an orbital debris issue” includes images from her collaborations with the artificial intelligence bot Midjourney, based upon the Elon Musk statement which is also the title of the work [1] regarding the SpaceX expansion. In my artistic research practice I explore questions of ownership and responsibility for the (light) pollution caused by colonization, space tourism and commercial space tech companies. Led by wealthy nations and private companies, this reflects the colonization of the Earth whose negative impact on the environment and cultures we have yet to come to terms with. It is estimated that there is already more than 200 000 kg of artificial material on the Moon, and the number of large pieces of debris in space is about 20 000. The starry sky we look upon nowadays is actually scattered with artificial lights which impossible for the bare eye to tell the difference. The sculpture ”Sipping Cosmic Latte in the Milky Way, waiting for The Big Crunch” is a reference to the color of the Universe as defined by scientists Karl Glazebrook and Ivan Baldry, named Cosmic Latte for its creamy yellowish white hue. The Big Crunch is a hypothetical scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe recollapses. [3] [1] https://www.theatlantic.com/science/archive/2019/05/spacex-satellites-starlink/590269 [2]https://www.astro.ljmu.ac.uk/~ikb/Cosmic-Spectrum.html [3]https://www.encyclopedia.com/education/encyclopedias-almanacs-transcripts-and-maps/big-crunch-theory
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| 7. |
- Arnadottir, Anna, et al.
(författare)
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Korallrevens Värld
- 2019
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- Dive into a tropical ocean and see thousands of colorful fish flutter by. Travel the globe to explore coral reefs teeming with life and learn how scientists are racing to develop sustainable solutions to protect these vitally important ecosystems for the future. Along the way, discover how corals live, breathe, and reproduce, supporting a quarter of all marine life on Earth and providing critical benefits to human communities in our ever-changing world.
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| 8. |
- Besharat, Zahra
(författare)
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Adsorption of molecular thin films on metal and metal oxide surfaces
- 2016
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- Metal and metal oxides are widely used in industry, and to optimize their performance their surfaces are commonly functionalized by the formation of thin films. Self-assembled monolayers (SAMs) are deposited on metals or metal oxides either from solution or by gas deposition. Thiols with polar terminal groups are utilized for creating the responsive surfaces which can interact electrostatically with other adsorbates. Surface charge effects wetting and adhesion, and many other surface properties. Polar terminal groups in thiols could be used to modify these factors. Mixed SAMs can provide more flexible surfaces, and could change the resulting surface properties under the influence of factors such as pH, temperature, and photo-illumination. Therefore, in order to control these phenomena by mixed polar-terminated thiols, it is necessary to understand the composition and conformation of the mixed SAMs and their response to these factors. In this work, mixtures of thiols with carboxylic and amino terminal groups were studied. Carboxylic and amino terminal groups of thiol interact with each other via hydrogen bonding in solution and form a complex. Complexes adsorb to the surface in non-conventional orientations. Unmixed SAMs from each type, either carboxylic terminated thiols or amino terminated thiols are in standing up orientation while SAMs from complexes are in an axially in-plane orientation. Selenol is an alternative to replace thiols for particular applications such as contact with biological matter which has a better compatibility with selenol than sulfur. However, the Se-C bond is weaker than the S-C bond which limits the application of selenol. Understanding the selenol adsorption mechanism on gold surfaces could shed some light on Se-C cleavage and so is investigated in this work. Se-C cleavage happens in the low coverage areas on the step since atoms at steps have lower coordination making them more reactive than atoms on the terraces. Another area where the self-assembly of molecules is of importance is for dye sensitized solar cells, which are based on the adsorption of the dye onto metal oxides surfaces such as TiO2.The interface between the SAM of dye and the substrate is an important factor to consider when designing dyes and surfaces in dye sensitized solar cells (DSSCs). The quality of the self-assembled monolayers of the dye on the TiO2 surface has a critical influence on the efficiency of the DSSCs. Creation of just a monolayer of dye on the surface could lead to an efficient current of photo-excited electrons to the TiO2 and degeneration of the dye by redox. This work, T-PAC dye showed island growth with some ad-layer that is not in contact with the surface, whereas the MP13 dye adsorption is laminar growth. Cuprite (Cu2O) is the initial and most common corrosion product for copper under atmospheric conditions. Copper could be a good replacement for noble metal as catalysts for methanol dehydrogenation. Knowledge about the structure of Cu2O(100) and Cu2O(111) surfaces could be used to obtain a deeper understanding of methanol dehydrogenation mechanisms with respect to adsorption sites on the surfaces. In this work, a detailed study was done of Cu2O(100) surface which revealed the possible surface structures as the result of different preparation conditions. Studies of the structure of Cu2O(100) and Cu2O(111) surfaces show that Cu2O(100) has a comparatively stable surface and reduces surface reactivity. As a consequence, dehydrogenation of methanol is more efficient on the Cu2O(111) surface. The hydrogen produced from methanol dehydrogenation is stored in oxygen adatom sites on both surfaces.
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| 9. |
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| 10. |
- Kaewmaraya, Thanayut, 1984-
(författare)
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First-Principles Studies of Materials Properties : Pressure-Induced Phase Transitions & Functional Materials
- 2015
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Konstnärligt arbete (övrigt vetenskapligt/konstnärligt)abstract
- This thesis presents the first-principles studies of materials properties within the framework of the density functional theory (DFT). The thesis constitutes three main parts, i. e., pressure-induced phase transitions in solids, data-storage and clean-energy materials.The first part focuses on the predictions of crystal structures and the determinations of electronic properties of Xe-H2, FeB4 and Co3O4. Pressurizing Xe-H2 compound yields the formation of H-rich Xe(H2)8, which can exhibit a metallic feature at comparatively lower pressure than pure hydrogen. Hard superconducting FeB4 gets transformed into a novel transparent phase under pressure owing to the enhanced overlap of atomic cores. Spinel Co3O4 undergoes the phase transition from a cubic to a monoclinic because of the charge transfer between cations via the increased 3d-3d interactions.The second part involves the study of structural and electronic properties of phase-change memory materials (PCMs), i. e., Ge2Sb2Te5 (GST) and Ga-doped In2O3. Van der Waals (vdW) interaction must be considered to obtain accurate crystal structure of layered GST. For Ga-doped In2O3 (GIO), the local structure of amorphous GIO is found to resemble that of amorphous In2O3, except the vicinity of doping atoms. The electronic property of a-GIO is metallic, which considerably differs from the semiconducting feature of the crystalline GIO. This emphasizes the contrast in the conductivity of the crystalline and amorphous upon phase switching of GIO.The third part associates with the search for clean-energy materials, viz., hydrogen production, hydrogen storage and green Mg-ion batteries. For hydrogen production, the role of intrinsic point defects to water adsorption on ZnO(10-10) surface is investigated. The findings show that the Zn and O defect-sites are energetically not favorable for the water adsorption and dissociation. For the purpose of storing hydrogen in a solid phase, silicene, doped by alkaline and alkaline earth metals, is investigated. We find that Li-doped and Na-doped silicene can attain the superior storage capacity. For cathode material of Mg-ion batteries, Mg2Mo6S8, the diffusivity of Mg ions occurs through an available channel in the bulk with the onset temperature of 200 K.
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