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  • 301.
    Sundin, Peter
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    Abrahamsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    van Groningen, Ernst
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    Sjöblom, Linnea
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    Kristófi, Zsuzsanna
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    International Science Programme: Annual Report for 20082009Report (Other (popular science, discussion, etc.))
    Abstract [en]

    ISP provides long-term support for the development of active and sustainable research environments within these basic sciences in developing countries. The support is directed to research groups and regional networks. The work is carried out in close cooperation with research groups at more advanced host institutions. Although Uppsala Univ. is the base of the operation, ISP functions as a national programme and host laboratories may be located at other Swedish universities, in other Nordic and European countries, and in the regions. This is to meet the requests from developing countries on their own terms.

    ISP support includes equipment, spare parts consumables, technical services, literature, computer hard- and software, and all costs associated with participating in meetings, exchange visits, training, etc. Besides what has been achieved in terms of development and maintenance of resources, contacts, etc., the outcome of ISP support in 2008 can be summarized by the following figures (assuming that one € equals 10 SEK):

    • 19 PhD graduations per M€ invested.
    • 54 MSc/MPhil graduations per M€ invested.
    • 80 international publications per M€ invested.
    • 27 regional or national publications per M€ invested.
    • 129 conference contributions (> 40% of which international) per M€ invested.
  • 302.
    Sundin, Peter
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    Abrahamsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    van Groningen, Ernst
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    Sjöblom, Linnea
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    Kristófi, Zsuzsanna
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, International Science Programme (ISP).
    International Science Programme: Annual Report for 20092010Report (Other (popular science, discussion, etc.))
    Abstract [en]

    ISP provides long-term support for the development of active and sustainable research environments within these basic sciences in developing countries. The support is directed to research groups and regional networks. The work is carried out in close cooperation with research groups at more advanced host institutions. Although Uppsala University is the base of the operation, ISP functions as a national programme and host laboratories may be at other Swedish universities, in other Nordic and European countries, and in the regions. This is to meet the requests from developing countries on their own terms.

    ISP funding is used for equipment, spare parts, consumables, technical services, literature, computer hard- and software, and costs associated with arranging and participating in meetings, exchange visits, training, etc. Besides what has been achieved in terms of development and maintenance of resources, contacts, etc., the results of ISP support in 2009 can be summarized based on the expenditures. For each MEUR spent (assuming that one EUR equals 10 SEK) the outcome was:

    • 19 PhD graduations,
    • 59 MSc/MPhil graduations,
    • 45 international publications,
    • 58 regional or national publicationst,
    • 113 conference contributions (34% of which international), and
    • 20 conferences/workshops etc. arranged.
  • 303.
    Swain, Ashok
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Challenges for water sharing in the Nile basin: changing geo-politics and changing climate2011In: Hydrological Sciences Journal, ISSN 0262-6667, E-ISSN 2150-3435, Vol. 56, no 4, p. 687-702Article in journal (Refereed)
    Abstract [en]

    For most of the 20th century, the Nile River has been the source of political tensions and low-intensity conflicts among three of its major riparian countries (Ethiopia, Sudan and Egypt). However, since the late 1990s, the Nile basin countries-with the encouragement and support of the international community-have made some attempts to establish basin-wide cooperative institutions. This process of engagement and collaboration is presently under severe stress due to increasing demand and decreasing supply of water resources in the basin. This situation may be complicated further by the global climate change, which is anticipated to result in long-term changes in the volume and pattern of runoff in the Nile River system. Moreover, the emergence of China as a major player in the power politics of the Nile basin has facilitated a number of unilateral initiatives for large-scale water development projects. In this context, this paper critically examines the survival and sustainability of water cooperation endeavours in the Nile basin as the river faces challenges from the global climate change and shifting regional geo-politics.

  • 304.
    Swain, Ashok
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Bali Swain, Ranjula
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economics.
    Themnér, Anders
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Krampe, Florian
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Climate Change and the Risk of Violent Conflicts in Southern Africa2011Book (Other academic)
    Abstract [en]

    This study aims to identify regions in the Zambezi River Basin in Southern Africa that are prone to risk of violent conflicts (collective violence, popular unrest) induced by climatic changes/variability. The Zambezi River is 575 kilometres long and the basin covers eight coun- tries: Zambia, Angola, Zimbabwe, Malawi, Tanzania, Botswana, Mo- zambique and Namibia.Besides the ecological impact, the study argues that socio-econom- ic and political problems are disproportionately multiplied by climate change/variability. Climate change/variability amplifies stresses on the socio-political fabric because it affects the governance of resources, and hence, is linked to the weakened mitigation and adaptation capac- ity of societies, that are already facing economic challenges (rising food prices, etc.). Society becomes highly vulnerable to climate induced con- flicts when it suffers from poor central leadership, weak institutions and polarized social identities. Taking all these factors into consideration, this study identifies Bulawayo/Matableleland-North in Zimbabwe and the Zambezia Province in Mozambique as the most likely regions to experience climate induced conflicts in the near future. The reasons for arriving at this conclusion are: a) Climatechange/variabilitywillhaveasignificantimpactonthesetwo regions; due to increasing water scarcity in Bulawayo/Matabeleland- North; and intensified flooding, sea-level rise, and costal erosion in the Zambezia Province. b) Due to climate change/variability, agricultural production in these two regions will become highly volatile, leading to severe food insecurity. c) Both regions are suffering from low quality political governance, having unscrupulous elites, weak institutions, and polarized social identities.

  • 305.
    Swain, Ashok
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Jamali, Qazal
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    The China Factor: New Challenges for Nile Basin Cooperation2011In: New Routes, ISSN 1403-3755, E-ISSN 2000-8082, Vol. 15, no 3, p. 7-10Article in journal (Other academic)
    Abstract [en]

    The emergence of China in the Nile basin happened simultaneously to the cooperative developments among the 10 riparian countries. This paper argues that the power structures shifted from international agencies, which advance basin-wide cooperation, to private (Chinese) enterprises that advance unilateral undertakings. The decline of influence from international agencies who generally act in accordance to the Western liberal-democratic morale and China’s increasing influence by unilateral development, challenges the cooperative (multilateral) regime. Generally, this shift in the balance of power in the Nile region is regarded with suspicion by the Western dominated view as they question the ‘responsible’ engagement of China and the risks that come with ‘no strings attached’ policy that come with unilateral development.

  • 306.
    Swain, Ashok
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Kostic, Roland
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, The Uppsala Programme for Holocaust and Genocide Studies.
    Krampe, Florian
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Environmental Security and Peace Building Projects: Necessary trade off for bringing peace or grossly negligent?2009In: Annual Conference of the Swedish Network of Peace, Conflict and Development Research, “Development and Security Nexus” Stockholm 6-7 November 2009, 2009Conference paper (Other academic)
    Abstract [en]

    Several studies show that environmental stress is one main catalyst that creates societal insecurities that ends up in conflict. International peacekeeping operations react to conflicts and address the societal insecurity in the conflict and post-conflict situation. But environmental stress increasing directly and indirectly during the peace building will lead to environmental insecurity creating new casus belli. Thus, it is important to ask: do peace operations have the capacity to address and provide environmental security as well as they offer societal security?

    Taking the case of Kosovo the paper illustrates how the efforts of a complex peace building operation that aims to provide societal security leads to an increasing environmental stress. Direct effects are development induced displacement and pollution caused e.g. by the extensive open cast mining for lignite. The paper argues that environmental and societal security needs have to be addressed simultaneously to reduce the danger of reoccurring conflicts.

     

  • 307.
    Swain, Ashok
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Krampe, Florian
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Stability and sustainability in peace building: Priority area for warfare ecology2011In: Warfare Ecology: A new synthesis for peace and security / [ed] Gary E. Machlis, Thor Hanson, Zdravko Špirić and Jean E. McKendry, London: Springer , 2011, p. 199-210Chapter in book (Refereed)
    Abstract [en]

    The chapter aims to highlight the importance of efficient management of the environment in providing stable and sustainable peace to a post-conflict society. An attempt has been made to give selected cases where sustainable economic development is neglected and short-term, situational development is favored in post-conflict peacebuilding systems. The negative outcome of this approach has been the pollution of the environment, and also, in some instances creating further conflicts and insecurity in the society. In order to avoid these negative consequences, three policy recommendations – good governance, inter-state cooperation and early warning systems – have been elaborated for how to address and successfully overcome the environmental threats to sustainable peace – hence, how sustained stability can be brought into post-conflict systems.

  • 308.
    Swain, Ashok
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Krampe, Florian
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Stability and Sustainability in Peace Building Systems and the Environment2009Conference paper (Other academic)
    Abstract [en]

    The chapter aims to highlight the importance of efficient management of environment in providing stable and sustainable peace to a post conflict society. An attempt has been made to give selected cases where sustainable economic development is neglected in post conflict peace building systems. Finally, there are three policy recommendations provided for how to address and successfully overcome the threats to sustainable peace – hence, how sustained stability can be brought into post-conflict projects.

  • 309.
    Swain, Ashok
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Krampe, Florian
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development. Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Transboundary Rivers and Climate Change: African and Asian Rivers2011In: Conflict Trends, ISSN 1561-9818, no 2, p. 16-21Article in journal (Other academic)
  • 310. Thörn, Håkan
    et al.
    Moksnes, Heidi
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Global civil society: Beyond the 'good' and the 'bad'2012In: Global Civil Society: Shifting Powers in a Shifting World / [ed] Heidi Moksnes and Mia Melin, Uppsala: Uppsala universitet, 2012, p. 3-7Chapter in book (Other academic)
  • 311. Tonkov, S.
    et al.
    Velichkov, I.
    Popov, G.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Zlatanov, T.
    Hinkov, G.
    On the Holocene history of sweet chestnut forests in Belasitsa mountain, Southwestern Bulgaria2012In: Comptes Rendus de l'Academie Bulgare des Sciences / Proceedings of the Bulgarian Academy of Sciences, ISSN 1310-1331, E-ISSN 2367-5535, Vol. 65, no 11, p. 1549-1554Article in journal (Refereed)
    Abstract [en]

    The Holocene history of sweet chestnut (Castanea sativa Mill.) on the northern slopes of Belasitsa Mountain was studied by pollen analysis and radiocarbon dating of a core collected from a small mire. The results showed that more than 8000 years ago this tree was spontaneously growing in the mountain before the first Neolithic inhabitants settled in the Struma River Valley and its tributaries. The enlargement of the areas occupied by sweet chestnut started with its wide cultivation since the time of the Roman colonization. The new palynological information supports the hypothesis for possible existence of refugia for Castanea sativa in Southwestern Bulgaria.

  • 312.
    Tonkov, Spassimir
    et al.
    Sofia Univ St Kliment Ohridski, Dept Bot, Fac Biol, Palynol Lab, Sofia 1164, Bulgaria..
    Bozilova, Elissaveta
    Sofia Univ St Kliment Ohridski, Dept Bot, Fac Biol, Palynol Lab, Sofia 1164, Bulgaria..
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Lateglacial to Holocene vegetation development in the Central Rila Mountains, Bulgaria2016In: The Holocene, ISSN 0959-6836, E-ISSN 1477-0911, Vol. 26, no 1, p. 17-28Article in journal (Refereed)
    Abstract [en]

    The vegetation history of the Central Rila Mountains for the last 14,000years was reconstructed by means of pollen analysis and radiocarbon chronology of a core retrieved from Lake Manastirsko-2 (2326m). The Lateglacial landscape was dominated by open herb vegetation composed of Artemisia, Chenopodiaceae, Poaceae, and other cold-resistant herbs (14,000-11,700 cal. yr BP). Stands of Pinus, Betula, and Juniperus-Ephedra shrubland partly enlarged during the Lateglacial interstadial. Pioneer forests of Betula with Pinus and Juniperus occupied barren soils in the early Holocene (11,700-7900 cal. yr BP), while mixed oak forests with Tilia, Ulmus, Acer, and later on Corylus spread at lower elevations. A coniferous forest belt with Pinus sylvestris, Pinus peuce, and Abies developed after 7900 cal. yr BP in the conditions of milder winters, cooler summers, and increase in precipitation. The late Holocene dynamic vegetation changes were associated with the invasion of Picea abies after 3400 cal. yr BP, while Fagus communities slightly enlarged in the river valleys. Indications of human activities are visible in the pollen diagram since the Late Bronze Age' (3400-3200 cal. yr BP). The vegetation development in the study area followed a similar pattern when compared with palynological and macrofossil records from other parts of the Rila and the adjacent Northern Pirin Mountains. On a larger geographical scale, the postglacial vegetation history of the Rila Mountains displays common features with sites in the Romanian Carpathians, whereas the differences observed are result of the location of tree refugia, competing abilities, climate changes, and human activities.

  • 313. Tonkov, Spassimir
    et al.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    25. Mire Gyola, Belasitsa Mountain (south-western Bulgaria)2014In: Grana, ISSN 0017-3134, E-ISSN 1651-2049, Vol. 53, no 4, p. 312-314Article in journal (Refereed)
  • 314.
    Tonkov, Spassimir
    et al.
    Sofia Univ St Kliment Ohridski, Fac Biol, Dept Bot, Lab Palynol, 8 Dragan Tzankov Blvd, Sofia 1164, Bulgaria..
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Bozilova, Elissaveta
    Sofia Univ St Kliment Ohridski, Fac Biol, Dept Bot, Lab Palynol, 8 Dragan Tzankov Blvd, Sofia 1164, Bulgaria..
    Marinova, Elena
    Katholieke Univ Leuven, Ctr Archaeol Sci, B-3001 Leuven, Belgium.;Landesamt Denkmalpflege Baden Wurttemberg, Regierungsprasidium Stuttgart, Fischersteig 9, D-78343 Gaienhofen Hemmenhofen, Germany..
    Pavlova, Dolja
    Sofia Univ St Kliment Ohridski, Fac Biol, Dept Bot, Lab Palynol, 8 Dragan Tzankov Blvd, Sofia 1164, Bulgaria..
    On the Holocene vegetation history of the Central Rila Mountains, Bulgaria: The palaeoecological record of peat bog Vodniza (2113 m)2018In: Review of Palaeobotany and Palynology, ISSN 0034-6667, E-ISSN 1879-0615, Vol. 250, p. 16-26Article in journal (Refereed)
    Abstract [en]

    Information on the Holocene vegetation history of the Central Rila Mountains for the last 10,000 years was obtained by means of pollen and fossil stomata analyses of a 500 cm core retrieved from peat bog Vodniza (2113 ma.s.l.), and supported by radiocarbon chronology. The early Holocene afforestation started with an initial Betula phase with stands of Juniperus and Pinus which occupied barren soils (10,000-8300 cal. yrs. BP) while deciduous oak forests with abundant Tilia, Ulmus, Acer, and later on Corylus, spread at lower elevations. During the Holocene climatic optimum (8300-6000 cal. yrs. BP) the conifers Pious (Pious sylvestris, Pinus mugo, Pinus peuce) and Abies expanded at the expense of the birch and oak forests. The tree line was running above 2100 m comparable to the present-day situation and started to descend after ca. 3200 cal. yrs. BP mostly due to human impact. The last tree which penetrated into the coniferous belt after 3400 cal. yrs. BP and reached altitudes of 2000-2100 m, confirmed by the find of fossil stomata, was Picea abies. Its maximal distribution was achieved between 2250 and 1100 cal. yrs. BP, alongside with some enlargement of beech communities. The first indications of stockbreeding and other human activities in the Central Rila Mountains were recorded since 3400-3200 cal. yrs. BP (Late Bronze Age). The vegetation reconstruction during the Holocene followed a pattern coherent with the information from the Northern Pirin and partly from the Western Rhodopes Mountains. The palaeoecological evidence from the Rila Mountains could be compared in broad lines with the high quality data obtained from the Romanian Carpathians by the application of multi-proxy research approach.

  • 315.
    Tovesson, F., Hambsch, F.-J., Oberstedt, A., Fogelberg, B., Ramström, E. and Oberstedt, S.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Determination of the 233Pa(n,f) reaction cross section for thorium fueled reactors2002In: Proceedings of Workshop on Advanced Reactors with Innovative Fuels ARWIF 2001, Chester, UK, Oct 22-24,2001, Nuclear Energy Agency, 2002 461, 2002Conference paper (Other scientific)
  • 316.
    Tovesson, F., Hambsch, F.-J., Oberstedt, A., Fogelberg, B., Ramström, E. and Oberstedt, S.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    The Pa-233 Fission Cross Section2002In: Proc.of the Int.conf. on Nuclear Data for Science and Technology, Oct.7-12, 2001, Tsukuba, Japan. Journal of Nuclear Science and Technology, Supplement 2, (August 2002) 210, 2002Conference paper (Other scientific)
  • 317.
    Tovesson, F., V.Fritsch, F.-J.Hambsch, S.Oberstedt, A.Oberstedt, B.Fogelberg, E.Ramstrom
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    The 233Pa fission cross-section2003In: IRMM Neutron Physics Unit 2002 Scientific Report; EUR 20684 EN, , p. 11Other (Other scientific)
  • 318.
    Tran, Tuan
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jablonka, Lukas
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Bruckner, Barbara
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Johannes Kepler Univ Linz, Atom Phys & Surface, A-4040 Linz, Austria.
    Rund, Stefanie
    Johannes Kepler Univ Linz, Atom Phys & Surface, A-4040 Linz, Austria.
    Roth, Dietmar
    Johannes Kepler Univ Linz, Atom Phys & Surface, A-4040 Linz, Austria.
    Sortica, Mauricio A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Bauer, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory. Johannes Kepler Univ Linz, Atom Phys & Surface, A-4040 Linz, Austria.
    Zhang, Zhen
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Primetzhofer, Daniel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Electronic interaction of slow hydrogen and helium ions with nickel-silicon systems2019In: Physical Review A: covering atomic, molecular, and optical physics and quantum information, ISSN 2469-9926, E-ISSN 2469-9934, Vol. 100, no 3, article id 032705Article in journal (Refereed)
    Abstract [en]

    Electronic stopping cross sections (SCSs) of nickel, silicon, and nickel-silicon alloys for protons and helium (He) ions are studied in the regime of medium- and low-energy ion scattering, i.e., for ion energies in the range from 500 eV to 200 keV. For protons, at velocities below the Bohr velocity the deduced SCS is proportional to the ion velocity for all investigated materials. In contrast, for He ions nonlinear velocity scaling is observed in all investigated materials. Static calculations using density functional theory (DFT) available from the literature accurately predict the SCS of Ni and Ni-Si alloy in the regime with observed velocity proportionality. At higher energies, the energy dependence of the deduced SCS of Ni for protons and He ions agrees with the prediction by recent time-dependent DFT calculations. The measured SCS of the Ni-Si alloy was compared to the SCS obtained from Bragg's rule based on SCS for Ni and Si deduced in this study, yielding good agreement for protons, but systematic deviations for He projectiles, by almost 20%. Overall, the obtained data indicate the importance of nonadiabatic processes such as charge exchange for proper modeling of electronic stopping of, in particular, medium-energy ions heavier than protons in solids.

  • 319.
    Tseggai, M
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Nordblad, Per
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Tellgren, Roland
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry.
    Rundlöf, Håkan
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry.
    Azad, A.K
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Eriksson, S.G
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Eriksen, J
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Nuclear structure and magnetic properties of perovskite compounds La1−xNdxFe0.5Cr0.5O3 (x = 0.1, 0.15 and 0.2)2008In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 458, no 1-2, p. 372-377Article in journal (Refereed)
    Abstract [en]

    Perovskite oxides with the composition La1−xNdxFe0.5Cr0.5O3 (x = 0.10, 0.15 and 0.20) have been studied. The samples have been prepared using the standard solid-state reaction method in air. The X-ray and neutron diffractograms indicates that the samples crystallize in the orthorhombic perovskite structure with space group Pnma (No. 62). The Nd-substitution causes minor changes in the cell parameters and bond lengths but the nuclear structure remains orthorhombic in the whole range of substitutions and in the temperature range of 10–700 K. The magnetic structure of the samples at room temperature and below is G-type antiferromagnetic with an average magnetic moment of the Fe/Cr ions of 3.29(3) μB/atom at 10 K independent of the Nd content. At room temperature the average magnetic moment of the Fe/Cr ions reduces to 1.23 μB/atom. At temperatures below 250 K a weak but increasing uncompensated spontaneous magnetic moment develops that reaches a magnitude of about 0.5 emu/g (or 0.02 μB per Fe/Cr site) at 10 K. This moment saturates rather rapidly in the magnetization versus magnetic field curve and is at higher field superposed on the response of the antiferromagnetic spin system.

  • 320. Turner, S. F.
    et al.
    Clarke, S. M.
    Rennie, Adrian
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Neutron Research.
    Thirtle, P. N.
    Li, Z. X.
    Thomas, R. K.
    Langridge, S.
    Penfold, J.
    Adsorption of gelatin to a polystyrene/water interface as a function of concentration, pH, and ionic strength2005In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 21, no 22, p. 10082-10088Article in journal (Refereed)
  • 321.
    Valkeapää, M., Eriksson, S._ G., Eriksen, J., Rundlöf, Håkan, Mathieu, R. and Svedlindh, P.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    La1-xSrxMnO3(0.33ŠxŠ1.0)perovskites; structure, chemical analysis, resistivity and magnetisation2002In: Ferroelectrics, Vol. 270, p. 111-Article in journal (Refereed)
  • 322.
    Valkeapää, M
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory. Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Materials Chemistry, Structural Chemistry.
    Eriksson, S-G
    Eriksen, J
    Technology, Department of Materials Science. Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Materials Chemistry, Structural Chemistry.
    Rundlöf, Håkan
    Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Materials Chemistry, Structural Chemistry. strukturkemi.
    Mathieu, R
    Svedlindh, P
    La1-xSrxMnO3 (0.33<x<1.0) perovskites; structure, chemical analysis, resistivity and magnetisation2001In: Ferroelectrics, Vol. in pressArticle in journal (Refereed)
  • 323.
    Visser, D
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Delaplane, RG
    Maaskant, WJA
    Structural study of the high-temperature phases of the hexagonal perovskite KNiCl32000In: PHYSICA B, ISSN 0921-4526, Vol. 276, p. 300-301Article in journal (Other scientific)
    Abstract [en]

    Between room temperature and its melting point at 645 degrees C, KhTiCl(3) shows two structural phase transitions. The beta --> alpha transition at 287 degrees C has a second-order character. The unit cell changes in size from a root 3 x a root 3 re to a

  • 324.
    Wallensteen, Peter
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Peace and Conflict Research.
    Gustafsson, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
    Ryden, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Uppsala Centre for Sustainable Development.
    Tibell, Gunnar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    El Código de Ética para Científicos de la Universidad de Uppsala”2010In: Estudios y documentos en política científica de América Latina y el Caribe, Volumen II, Montevideo: Oficina Regional de Ciencia para América Latina y el Caribe de UNESCO, , 2010Chapter in book (Other academic)
  • 325.
    Wang, Y. D., Lin Peng, R., Wang, X. L. and McGreevy, R. L.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Grain-orientation-dependent residual stress and the effect of annealing in cold rolled stainless steel2002In: Acta Materialia, Vol. 50, p. 1717-Article in journal (Refereed)
  • 326.
    Wang, Y. D. , X. L. Wang, A. D. Stoica, J. W. Richardson and R. L. Peng
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Determination of the stress orientation distribution function using pulsed neutron sources2003In: Journal of Applied Crystallography, Vol. 36(1), p. 14-22Article in journal (Refereed)
  • 327.
    Wang, YD
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Peng, RL
    McGreevy, RL
    A novel method for constructing the mean field of grain-orientation-dependent residual stress2001In: PHILOSOPHICAL MAGAZINE LETTERS, ISSN 0950-0839, Vol. 81, no 3, p. 153-163Article in journal (Refereed)
    Abstract [en]

    The heterogeneity of grain-orientation-dependent residual stress (ODRS) in polycrystalline materials has received a great deal of attention in the past few years. This letter describes a novel method, called the spherical harmonics approach (SHA), for ana

  • 328.
    Wang, YD
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Peng, RL
    McGreevy, RL
    Development of intergranular stress of annealed stainless steel2001In: J. Neutron Research, Vol. 9, p. 331-Article in journal (Refereed)
  • 329.
    Wang, YD
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Peng, RL
    McGreevy, RL
    On the physical line shape of diffraction peaks constructed by MEM and FT2002In: J. Applied Cryst., Vol. submittedArticle in journal (Refereed)
  • 330.
    Wang, YD
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Peng, RL
    Zeng, XH
    McGreevy, R
    Stress-orientation distribution function (SODF) - Description, symmetry and determination2000In: ECRS 5: PROCEEDINGS OF THE FIFTH EUROPEAN CONFERENCE ON RESIDUAL STRESSES, TRANS TECH PUBLICATIONS LTD , 2000, Vol. 347-3, p. 66-71Conference paper (Refereed)
    Abstract [en]

    In this paper, a stress-orientation distribution function (SODF) is defined to describe statistically the distribution of the stress state of grains as a function of crystal orientation. Similar to the crystal orientation distribution function (CODF), the

  • 331.
    Wannberg A, Mellergård A, Zetterström P, Delaplane R, Grönros M, Karlsson L-E, McGreevy R L
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    SLAD: A neutron diffractometer for the study of disordered materials1999In: Journal of Neutron Research, Vol. 8, p. 133-154Article in journal (Refereed)
    Abstract [en]

    The Studsvik Liquid and Amorpous materials Diffractometer (SLAD)is a neutron diffractometer designed for measurements of the structure factor of liquids, glasses and amorphous materials, for total (i.e. Bragg and diffuse) scattering measurements from powd

  • 332.
    Wasse, JC
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Salmon, PS
    Delaplane, RG
    Structure of molten trivalent metal bromides studied by using neutron diffraction: The systems DyBr3, YBr3, HoBr3 and ErBr32000In: JOURNAL OF PHYSICS-CONDENSED MATTER, ISSN 0953-8984, Vol. 12, no 46, p. 9539-9550Article in journal (Other scientific)
    Abstract [en]

    The structure of the salts MBr3, where M3+ denotes Dy3+, Y3+, Ho3+ or Er3+, was investigated by using neutron diffraction. On heating DyBr3, YBr3 and HoBr3, a phase transition from the FeCl3-type crystal structure to possibly the YCl3-type crystal structu

  • 333.
    Wimpory, R.C., P.S. May, N.P. O'Dowd, G.A. Webster, D.J.Smith and E. Kingston
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Measurement of Residual Stresses in T-Plate Weldments2003In: J. Strain Analysis, Vol. 38(4), p. 349-365Article in journal (Refereed)
  • 334.
    Winterer, M
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Delaplane, RG
    McGreevy, RL
    X-ray diffraction, neutron scattering and EXAFS Spectroscopy of monoclinic zirconia: analysis by Rietveld refinement and reverse Monte Carlo simulations2002In: J. Applied Cryst., Vol. submittedArticle in journal (Refereed)
  • 335. Wolpher, Henriette
    et al.
    Johansson, Olof
    Abrahamsson, Maria
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Accelerator mass spectrometry group. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical Chemistry.
    Kritikos, Mikael
    Sun, Licheng
    Åkermark, Björn
    A tridentate Ligand for Preparation of Bisterpyridine-like Ruthenium(II) Complexes with an Increased Excited State Lifetime2004In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 7, no 3, p. 337-340Article in journal (Refereed)
    Abstract [en]

    A new tridentate polypyridine ligand, 6-(2-picolyl)-2,2-bipyridine, as well as its homoleptic Ru(II) complex has been prepared. Photophysical studies show a prolonged lifetime of the excited state compared to [Ru(tpy)2]2+, where tpy is 2,2:6,2″-terpyridine.

  • 336.
    Xing, Shan
    et al.
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian AMS Ctr,Inst Earth Environm, Xian 710061, Peoples R China..
    Hou, Xiaolin
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian AMS Ctr,Inst Earth Environm, Xian 710061, Peoples R China.;Tech Univ Denmark, Ctr Nucl Technol, Riso Campus, DK-4000 Roskilde, Denmark..
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. United Arab Emirates Univ, Dept Geol, Al Ain, U Arab Emirates..
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Speciation analysis of I-129 in seawater using coprecipitation and accelerator mass spectrometry and its applications2017In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 311, no 1, p. 833-841Article in journal (Refereed)
    Abstract [en]

    Speciation analysis of long-lived I-129 in seawater can provide useful information on the source of water masses. This paper presents an improved method for speciation analysis of I-129 based on coprecipitation of iodide as AgI with Ag2SO3 and AgCl. By adding a small amount of I-127 carrier, the separation efficiency of iodine species and the accuracy and precision of I-129 measurement are remarkably improved. I-129 species in depth profiles of seawater from the Antarctic were analyzed for investigation of water circulation in the Antarctic.

  • 337. Xing, Shan
    et al.
    Hou, Xiaolin
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Shi, Keliang
    Yi, Peng
    Zhou, Weijian
    Iodine-129 in Snow and Seawater in the Antarctic: Level and Source2015In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 49, no 11, p. 6691-6700Article in journal (Refereed)
    Abstract [en]

    Anthropogenic I-129 has been released to the environment in different ways and chemical species by human nuclear activities since the 1940s. These sources provide ideal tools to trace the dispersion of volatile pollutants in the atmosphere. Snow and seawater samples collected in Bellingshausen, Amundsen, and Ross Seas in Antarctica in 2011 were analyzed for I-129 and I-127, including organic forms; it was observed that I-129/I-127 atomic ratios in the Antarctic surface seawater ((6.1-13) x 10(-12)) are about 2 orders of magnitude lower than those in the Antarctic snow ((6.8-9.5) x 10(-1)0), but 4-6 times higher than the prenuclear level (1.5 x 10(-12)), indicating a predominantly anthropogenic source of I-129 in the Antarctic environment. The I-129 level in snow in Antarctica is 24 orders of magnitude lower than that in the Northern Hemisphere, but is not significantly higher than that observed in other sites in the Southern Hemisphere. This feature indicates that I-129 in Antarctic snow mainly originates from atmospheric nuclear weapons testing from 1945 to 1980; resuspension and re-emission of the fallout I-129 in the Southern Hemisphere maintains the I-129 level in the Antarctic atmosphere. I-129 directly released to the atmosphere and re-emitted marine discharged I-129 from reprocessing plants in Europe might not significantly disperse to Antarctica.

  • 338.
    Xing, Shan
    et al.
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian AMS Ctr,Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China..
    Hou, Xiaolin
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian AMS Ctr,Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China.;Techn Univ Denmark, Ctr Nucl Technol, DK-4000 Roskilde, Denmark..
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. United Arab Emirates Univ, Dept Geol, Al Ain 17511, U Arab Emirates..
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Shi, Keliang
    Techn Univ Denmark, Ctr Nucl Technol, DK-4000 Roskilde, Denmark.;Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 73000, Gansu, Peoples R China..
    Yi, Peng
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Jiangsu, Peoples R China..
    Zhou, Weijian
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian AMS Ctr,Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China..
    Water Circulation and Marine Environment in the Antarctic Traced by Speciation of I-129 and I-1272017In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 7726Article in journal (Refereed)
    Abstract [en]

    Emissions of anthropogenic I-129 from human nuclear activities are now detected in the surface water of the Antarctic seas. Surface seawater samples from the Drake Passage, Bellingshausen, Amundsen, and Ross Seas were analyzed for total I-129 and I-127, as well as for iodide and iodate of these two isotopes. The variability of I-127 and I-129 concentrations and their species (I-127(-)/(IO3-)-I-127, I-129(-)/(IO3-)-I-129) suggest limited environmental impact where ((1.15-3.15) x 10(6) atoms/L for I-129 concentration and (0.61-1.98) x 10(-11) for I-129/I-127 atomic ratios are the lowest ones compared to the other oceans. The iodine distribution patterns provide useful information on surface water transport and mixing that are vital for better understanding of the Southern Oceans effects on the global climate change. The results indicate multiple spatial interactions between the Antarctic Circumpolar Current (ACC) and Antarctic Peninsula Coastal Current (APCC). These interactions happen in restricted circulation pathways that may partly relate to glacial melting and icebergs transport. Biological activity during the warm season should be one of the key factors controlling the reduction of iodate in the coastal water in the Antarctic.

  • 339. YanWu, Lue
    et al.
    ZhaoYan, Gu
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    HuCai, Zhang
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    GuoLiang, Lei
    Be-10 in quartz gravel from the Gobi Desert and evolutionary history of alluvial sedimentation in the Ejina Basin, Inner Mongolia, China2010In: Chinese Science Bulletin, ISSN 1001-6538, E-ISSN 1861-9541, Vol. 55, no 33, p. 3802-3809Article in journal (Refereed)
    Abstract [en]

    Reconstructing the evolutionary history of the Gobi deserts developed from alluvial sediments in arid regions has great significance in unraveling changes in both tectonic activity and climate. However, such work is limited by a lack of suitable dating material preserved in the Gobi Desert, but cosmogenic Be-10 has great potential to date the Gobi deserts. In the present study, Be-10 in quartz gravel from the Gobi deserts of the Ejina Basin in Inner Mongolia of China has been measured to assess exposure ages. Results show that the Gobi Desert in the northern margin of the basin developed 420 ka ago, whereas the Gobi Desert that developed from alluvial plains in the Heihe River drainage basin came about during the last 190 ka. The latter developed gradually northward and eastward to modern terminal lakes of the river. These temporal and spatial variations in the Gobi deserts are a consequence of alluvial processes influenced by Tibetan Plateau uplift and tectonic activities within the Ejina Basin. Possible episodes of Gobi Desert development within the last 420 ka indicate that the advance/retreat of alpine glaciers during glacial/interglacial cycles might have been the dominant factor to influencing the alluvial intensity and water volume in the basin. Intense floods and large water volumes would mainly occur during the short deglacial periods.

  • 340. Yartys, V. A.
    et al.
    Denys, Roman V.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Isnard, O.
    Laboratoire de Crystallographie du CNRS.
    Delaplane, Robert G.
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Svedlindh, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Buschhow, K. H. J.
    Van Der Waals Zeeman Institute, University of Amsterdam.
    Crystal and magnetic structure of TbNiSnD studied by neutron powder diffraction2007In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 311, no 2, p. 639-643Article in journal (Refereed)
    Abstract [en]

    The crystal and magnetic structure of TbNiSnD has been studied by neutron powder diffraction. The deuteride crystallizes with the filled TiNiSi type structure (sp. gr. Pnma; a=7.0354(1); b=4.20662(9); c=8.1808(2) Å at 293 K; a=7.008(1); b=4.1954(6); c=8.153(1) Å at 2 K) and is canted ferromagnetic below 10 K. The deuterium atoms occupy the tetrahedral Tb3Ni sites. The Tb atoms carry a magnetic moment of 6.6(1) μB /Tb. They order antiferromagnetically along the a-axis and ferromagnetically along the c-axis. No significant magnetic moment on the Ni atoms has been observed by neutron diffraction. Insertion of deuterium in TbNiSn induces both a change of the magnetic structure and a reduction of the Tb magnitude of the magnetic moment.

  • 341.
    Yartys, VA
    et al.
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Denys, RV
    Bulyk, II
    Delaplane, RG
    Hauback, BC
    Powder neutron diffraction study of Nd6Fe13GaD12.3 with a filled Nd6Fe13Si-type structure2000In: JOURNAL OF ALLOYS AND COMPOUNDS, ISSN 0925-8388, Vol. 312, no 1-2, p. 158-164Article in journal (Other scientific)
    Abstract [en]

    Nd6Fe1.3GaD12.3 with a filled Nd6Fe13Si-type structure has been synthesised from the corresponding intermetallic compound at room temperature under a D-2 pressure of 1 bar and characterised by powder X-ray and high-resolution powder neutron diffraction (P

  • 342.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Hansen, V.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Hou, X. L.
    Iodine Isotopes (I-129 and I-127) in the Baltic Proper, Kattegat, and Skagerrak Basins2011In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 45, no 3, p. 903-909Article in journal (Refereed)
    Abstract [en]

    Radioactive anthropogenic pollution has raised concerns about the present and future environmental status of the semienclosed Baltic Sea. We here study the distribution and inventory of the anthropogenic radioactive I-129 in water depth profiles collected from 16 sites in August 2006 and 19 sites in April 2007 in the Baltic Proper and related Kattegat and Skagerrak basins. The results reveal considerable differences of I-129 concentration in terms Of spatial and temporal variability and expose relatively high concentrations in the deep waters. Variability in the concentration of I-127, stable natural isotope of iodine, seems to follow changes in the seawater salinity, but in oxygen-poor bottom waters sediment diagenetic release may contribute to the concentration of both isotopes in the water body. Inventory estimates show that I-129 in August 2006 (24.2 +/- 15.4 kg) is higher than that in April 2007 (14.4 +/- 8.3 kg) within the southern and central Baltic Proper whereas almost a constant load occurs in the Kattegat Basin. Calculated model inventory shows correspondence to empirical data and provides a guideline for future environmental assessment on the impact of I-129 load in the studied region.

  • 343.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Possnert, Goran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Hou, Xiaolin
    Technical University of Denmark, Risø Campus, Roskilde, Denmark.
    He, Peng
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Biao, Wang
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
    Depth profiles of I-129 species in the Bothnian Sea2013In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 295, no 2, p. 1459-1463Article in journal (Refereed)
    Abstract [en]

    The Bothnian Sea which is located between Finland and Sweden represents an important source of fresh water to the Baltic Sea. We here present new data on the radioactive isotope I-129 species from water samples collected in December 2009 at different depths in the Bothnian Sea. Concentrations of I-129(-) (iodide) in the Bothnian Sea range from 14 x 10(8) to 32 x 10(8) atoms/L, while (IO3)-I-129 (-) (iodate) concentrations are relatively low and fluctuating at 1 x 10(8) atoms/L. For nutrients data determined in the same samples as I-129, significant correlations could be found between I-129(-) and total P, NO3-N, SiO3-Si, but rather poor with NH4-N. The correlations suggest comparable source pathway of I-129(-) and nutrient parameters, while the source of NH4-N may be different. The small amounts and negligible change of (IO3)-I-129 (-) indicate prevailing extensive reduction of iodate in the Baltic Sea.

  • 344.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Hou, X. L.
    Hansen, V.
    Wang, B.
    I-127 and I-129 Species and Transformation in the Baltic Proper, Kattegat, and Skagerrak Basins2012In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 46, no 20, p. 10948-10956Article in journal (Refereed)
    Abstract [en]

    Occurrence of anthropogenic I-129 in seawater has provided invaluable information about water circulation and exchange rates, but results on I-129 species (iodide and iodate) are limited and only available for surface water. We here present the first extensive results on I-129 and I-127 species in samples of seawater depth profiles, which were collected in August 2006 and April 2007 in the Skagerrak, Kattegat, and Baltic Proper. The results expose <= 10% annual reduction of iodate as I-129 is transported from the English Channel along the Dutch coast and German Bight into the Skagerrak and Kattegat. The results also suggest strong variability between surface and bottom seawater with respect to the predominant iodine species. Distribution of iodide and iodate of both I-127 and I-129 in the Kattegat mainly reflects water mixing process rather than speciation transformation. In water of the Baltic Proper, high I-127(-)/(IO3-)-I-127 and I-129-/(IO3-)-I-129 values suggest effective reduction of iodate with a maximum rate of 8 x 10(-7) ((IO3-)-I-127) and 6 x 10(-14) ((IO3-)-I-129) (g/m(3).day). The reduction process of iodate seems to be related to decomposition of organic matter and photochemically induced reactions.

  • 345.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Hou, X. L.
    He, Peng
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Wang, Biao
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
    Seasonal variation of I-129 species in the Baltic Proper2013In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 295, no 3, p. 1797-1801Article in journal (Refereed)
    Abstract [en]

    Iodine speciation plays a significant role in iodine volatilizing into atmosphere from the seas, as well as serving as a biological indicator. Despite this importance, the data on iodine species revealed inconclusive evidence of what factors controlling speciation transformation. We here present new data on profiles of I-129 speciation in the Baltic Proper during November 2009. Along with the two earlier investigations (August 2006 and April 2007), an assessment of seasonal variation of I-129 species is presented. The results show that, due to the anoxic nature of Baltic Proper, presence of (IO3)-I-129 (-) in the Baltic Proper does not follow an obvious seasonal cycle, as the case with I-129(-). Concentrations of I-129(-) in the Baltic Proper exhibit higher values in summer than the other two seasons (spring and winter), which might be associated with degrading of organic matter and release from sediment to water column that is more pronounced during summer. I-129(-) in surface water from the three seasons does not reflect the release function from the reprocessing facilities during the period April 2007 to November 2009. Consequently variability of I-129(-) in surface seawater of the Baltic Proper depends, to some extent, on local physical as well as biochemical conditions.

  • 346.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Chen, X. G.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Hou, X. L.
    Yu, Z. B.
    Xiong, D. H.
    Wang, Biao
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
    Circulation of water masses in the Baltic Proper revealed through iodine isotopes2013In: Applied Geochemistry, ISSN 0883-2927, E-ISSN 1872-9134, Vol. 36, p. 118-124Article in journal (Refereed)
    Abstract [en]

    Tracer technology has been used to understand water circulation in marine systems where the tracer dose is commonly injected into the marine waters through controlled experiments, accidental releases or waste discharges. Anthropogenic discharges of I-129 have been used to trace water circulation in the Arctic and North Atlantic Ocean. Here, I-129, together with I-127, is utilized as a tracer of water pathways and circulation in the Baltic Sea through collection of seawater depth profiles. The results indicate the presence of I-129 signatures which are distinct for each water mass and provide evidence for: (1) inflow water masses through the Drogden Sill that may reach as far as the SW of the Arkona Sea, (2) a portion of North Atlantic water in the bottom of Arkona basin, (3) cyclonic upwelling which breaks through the halocline in a pattern similar to the Baltic haline conveyor belt and (4) more influx of fresher water from the Gulf of Finland and Bothnian Sea in August relative to April. These findings provide advances in labeling and understanding water pathways in the Baltic Sea.

  • 347.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Chen, X. G.
    Bao, D. X.
    Qian, R. Z.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Tian, F. Y.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Bryhn, A. C.
    Gu, T. F.
    Hou, X. L.
    He, Peng
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Yu, Z. B.
    Wang, Biao
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics.
    Model simulation of inflow water to the Baltic Sea based on I-1292013In: Applied Radiation and Isotopes, ISSN 0969-8043, E-ISSN 1872-9800, Vol. 82, p. 223-231Article in journal (Refereed)
    Abstract [en]

    The semi-enclosed Baltic Sea represents a vital economic and recreational resource for more than 90 million people inhabiting its coasts. Extensive contamination of this sea by a variety of anthropogenic pollutants has raised the concern of the people in the region. Quantifying seawater inflow is crucial for estimating potential environmental risks as well as to find the best remedial strategy. We present here a model to estimate water inflow from the North Sea to the Baltic Sea by utilizing 1291 as a tracer. The results predicted inflow range of 230-450 km(3)/y with best fit value around 330 km(3)/y from the North Sea to the Baltic Sea during 1980-1999. Despite limited time series data on I-129, the model presented here demonstrates a new management tool for the Baltic Sea to calculate inflow water compared to conventional methods (such as salinity, temperature and hydrographic models). 

  • 348.
    Yi, Peng
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Aldahan, A.
    Hou, X. L.
    Bryhn, A. C.
    He, Peng
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    I-129 in the Baltic Proper and Bothnian Sea: application for estimation of water exchange and environmental impact2013In: Journal of Environmental Radioactivity, ISSN 0265-931X, E-ISSN 1879-1700, Vol. 120, p. 64-72Article in journal (Refereed)
    Abstract [en]

    We report here new data and a mass balance model for I-129 in the Baltic Proper and the Bothnian Sea covering the period from November-December 2009. The results showed that the general I-129 concentrations in the Bothnian Sea were two-four folds lower than in the Baltic Proper for both surface and deep water. Water exchange between the two basins based on the I-129 mass balance model suggests fluxes from the Baltic Proper to the Bothnian Sea and vice versa at 980 km(3)/y (600-1400 km(3)/y) and 1180 km(3)/y (780-1600 km(3)/y) respectively. Water retention time (residence time) in the Bothnian Sea was estimated at up to 4 years. Applying the I-129 exchange model, an estimate of total phosphorus and nitrogen inflow from the Baltic Proper to the Bothnian Sea indicates values of 20 +/- 7 x 10(3) tons/y and 300 +/- 50 x 10(3) tons/y respectively. The values for the outflow from the Bothnian Sea to the Baltic Proper hold 12 +/- 3 x 10(3) tons/y for total phosphorus and 283 +/- 55 x 10(3) tons/y for total nitrogen. These data and application of I-129 as a tracer of water masses provide information on small scale salinity changes which are vital for accurate understanding of the Baltic Sea ecosystems evolution through time.

  • 349.
    Yi, Peng
    et al.
    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;Joint Int Res Lab Global Change & Water Cycle, Nanjing 210098, Jiangsu, Peoples R China;Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Jiangsu, Peoples R China.
    Yu, Zhongbo
    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;Joint Int Res Lab Global Change & Water Cycle, Nanjing 210098, Jiangsu, Peoples R China;Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Jiangsu, Peoples R China.
    Chen, Peng
    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;Joint Int Res Lab Global Change & Water Cycle, Nanjing 210098, Jiangsu, Peoples R China;Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Jiangsu, Peoples R China.
    Aldahan, Ala
    United Arab Emirates Univ, Dept Geol, Al Ain 17551, U Arab Emirates.
    Hou, Xiaolin
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian AMS Ctr,Shaanxi Key Lab AMS Technol & Applic, Xian 710061, Shaanxi, Peoples R China;Tech Univ Denmark, Ctr Nucl Technol, Riso Campus, DK-4000 Roskilde, Denmark.
    Fan, Yukun
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian AMS Ctr,Shaanxi Key Lab AMS Technol & Applic, Xian 710061, Shaanxi, Peoples R China.
    Chen, Li
    Desert Res Inst, Div Hydrol Sci, Las Vegas, NV 89119 USA.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, Tandem Laboratory.
    Muscheler, Raimund
    Lund Univ, Dept Geol Quaternary Sci, S-22362 Lund, Sweden.
    Zhou, Weijian
    Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian AMS Ctr,Shaanxi Key Lab AMS Technol & Applic, Xian 710061, Shaanxi, Peoples R China.
    Sudicky, Edward
    Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON N2L 3G1, Canada.
    Schwartz, Frank
    Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA.
    Murad, Ahmed
    United Arab Emirates Univ, Dept Geol, Al Ain 17551, U Arab Emirates.
    Late Holocene pathway of Asian Summer Monsoons imprinted in soils and societal implications2019In: Quaternary Science Reviews, ISSN 0277-3791, E-ISSN 1873-457X, Vol. 215, p. 35-44Article in journal (Refereed)
    Abstract [en]

    The Asian Summer Monsoons (ASM) represent the main source of precipitation in China and East Asia with about one third of the world population and a region of widespread civilizations. Identifying the temporal and spatial patterns (pathways) of these monsoonal events during the Late Holocene to today has been a matter of debate amongst the scientific community. Here we show that the distribution patterns of the cosmogenic isotope Be-10 and oceanic I-127 in the topsoil across China exhibit imprints of the main ASM pathways. Our results indicate the monsoon pathway pattern persisted for several millennia or more and suggest a strong bond between Be-10 and water vapor transport patterns. Our data also reveal a(127)I distribution pattern controlled by the ASM pathways, rather than proximity to the sea or bedrock weathering. The persistent pathway of the ASM during the late Holocene, together with higher than average global soil iodine concentration, may have further strengthened the development of civilizations in this region of the world through reduction of iodine deficiency related diseases. (C) 2019 Elsevier Ltd. All rights reserved.

  • 350.
    Yunus, S.M. , A.K. Azad, S.-G. Eriksson, J. Eriksen, H.Rundlöf
    Uppsala University, Interfaculty Units, För teknisk-naturvetenskapliga fakulteten gemensamma enheter, The Studsvik Neutron Research Laboratory.
    Temperature dependent magnetic characterization of the spinel system GaxCoFe1-xCrO4 (0 £ x £ 1) by neutron powder diffraction at the range 10K to 500K2003In: Physica B, Vol. 337, p. 323-Article in journal (Other scientific)
45678 301 - 350 of 366
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