The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Vesapekka Herva - One of the best experts on this subject based on the ideXlab platform.
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nazi memorabilia dark heritage and treasure hunting as alternative tourism understanding the fascination with the Material Remains of world war ii in northern finland
Journal of Field Archaeology, 2016Co-Authors: Suzie Thomas, Oula Seitsonen, Vesapekka HervaAbstract:Sites connected to the Second World War (WWII) are increasingly recognized as worthy of archaeological investigation. Researchers are also becoming aware that that the collectors market in objects connected to WWII, particularly those connected to Germany, is encouraging the stripping of conflict landscapes in the search for “collectors items.” Finnish Lapland is sometimes regarded as peripheral compared to more centrally located regions of Europe. Archaeologists working here nonetheless find themselves in direct competition with enthusiastic treasure hunters. This is complicated even further by the myriad ontologies employed by different individuals in the construction of their relationship with the Material culture connected to recent conflict periods, and on specific “other” or “exotic” landscapes, such as Lapland. This paper examines what might be learnt about the nature of treasure hunting for and trading in WWII Material from Lapland, and its position within the emerging research on broader trends i...
N. Moncoffre - One of the best experts on this subject based on the ideXlab platform.
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Amorphisation of boron carbide under slow heavy ion irradiation
Journal of Nuclear Materials, 2016Co-Authors: D. Gosset, S. Miro, S. Doriot, N. MoncoffreAbstract:Boron carbide B4C is widely used as a neutron absorber in nuclear plants. Most of the post-irradiation examinations have shown that the structure of the Material Remains crystalline, in spite of very high atomic displacement rates. Here, we have irradiated B4C samples with 4 MeV Au ions with different fluences at room temperature. Transmission electron microscopy (TEM) and Raman spectroscopy have been performed. The Raman analyses show a high structural disorder at low fluence, around 10−2 displacements per atoms (dpa). However, the TEM observations show that the Material Remains crystalline up to a few dpa. At high fluence, small amorphous areas a few nanometers large appear in the damaged zone but the long range order is preserved. Moreover, the size and density of the amorphous zones do not significantly grow when the damage increases. On the other hand, full amorphisation is observed in the implanted zone at a Au concentration of about 0.0005. It can be inferred from those results that short range and long range damages arise at highly different fluences, that heavy ions implantation has drastic effects on the structure stability and that in this Material self-healing mechanisms are active in the damaged zone.
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Amorphisation of boron carbide under slow heavy ion irradiation
Journal of Nuclear Materials, 2016Co-Authors: D. Gosset, S. Miro, S. Doriot, N. MoncoffreAbstract:International audienceBoron carbide B4C is widely used as a neutron absorber in nuclear plants. Most of the post-irradiation examinations have shown that the structure of the Material Remains crystalline, in spite of very high atomic displacement rates. Here, we have irradiated B4C samples with 4 MeV Au ions with different fluences at room temperature. Transmission electron microscopy (TEM) and Raman spectroscopy have been performed. The Raman analyses show a high structural disorder at low fluence, around 10−2 displacements per atoms (dpa). However, the TEM observations show that the Material Remains crystalline up to a few dpa. At high fluence, small amorphous areas a few nanometers large appear in the damaged zone but the long range order is preserved. Moreover, the size and density of the amorphous zones do not significantly grow when the damage increases. On the other hand, full amorphisation is observed in the implanted zone at a Au concentration of about 0.0005. It can be inferred from those results that short range and long range damages arise at highly different fluences, that heavy ions implantation has drastic effects on the structure stability and that in this Material self-healing mechanisms are active in the damaged zone
J.n. Cooray - One of the best experts on this subject based on the ideXlab platform.
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The Sigiriya Royal Gardens
2012Co-Authors: J.n. CoorayAbstract:Besides the efforts that are of a descriptive and celebrative nature, studies related to Sri Lanka’s historical built heritage largely view Material Remains in historical, sociological, socio-historical and semiological perspectives. There is hardly any serious attempt to view such Material Remains from a technical-analytical approach to understand the compositional aspects of their design. The 5th century AC royal complex at Sigiriya is no exception in this regard. The enormous wealth of information and the Material Remains unearthed during more than 100 years of field-based research by several generations of archaeologists provide an ideal opportunity for such analysis. The present study aims, therefore, to fill the gap in research related to Sri Lanka’s historical built heritage in general, and to Sigiriya in particular. Therefore, the present research attempts to read Sigiriya as a landscape architectonic design to expose its architectonic composition and design instruments. The study, which is approached from a technicalanalytical point of view, follows a methodological framework that was developed at the Landscape Design Department of the Faculty of Architecture at the Delft University of Technology. The study reveals that the architectonic design of Sigiriya constitutes multiple design layers and multiple layers of significance with Materialspatial- metaphorical-functional coherence, and that it has both general and unique landscape architectonic elements, aspects, characteristics and qualities. The richness of its composition also enables the identification of the landscape architectural value of Sigiriya, which will help reshape policies related to conservation and presentation of Sigiriya as a heritage site, as well as to its protection and management as a green monument. The positive results of the study also underline that the methodology adopted in this research provides a framework for the study of other examples of historical gardens and landscapes in Sri Lanka, which will eventually provide insight into the typological aspects of a possible Sri Lankan tradition of landscape design.
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The Sigiriya Royal Gardens: Analysis of the landscape architectonic composition
2012Co-Authors: J.n. CoorayAbstract:Besides the efforts that are of descriptive and celebrative nature, studies related to Sri Lanka’s historical built heritage are largely to view Material Remains in historical, sociological, socio-historical and semiological perspectives. But there is hardly any serious attempt to view such Material Remains from a technical-analytical approach to understand the compositional aspects of their designs. The 5th century AC royal complex at Sigiriya is no exception in this regard. The enormous wealth of information and the unearthed Material Remains during more than hundred years of field-based research by several generations of archaeologists at Sigiriya provide ideal opportunity for such an analysis. The present study is, therefore, to fill the gap in research related to Sri Lanka’s historical built heritage in general and to Sigiriya in particular. Therefore the present research attempts to read Sigiriya as a landscape architectonic design to expose its architectonic composition and design instruments. The study which is approached from a technical-analytical point of view follows a methodological framework that is developed at the Landscape Design Department of the Faculty of Architecture at Delft University of Technology. The study reveals that the architectonic design of Sigiriya constitutes multiple design layers and multiple layers of significance with Material-spatial-metaphorical-functional coherence, and that it has both general and unique landscape architectonic elements, aspects, characteristics and qualities. The richness of its composition also enables to identify the landscape architectural value of the Sigiriya, which will help re-shape the policies related to conservation and presentation of Sigiriya as a heritage site as well as the protection and management as a green monument. The positive results of the study also underline that the methodology adapted in this research has devised a framework for the study of other examples of historical gardens and landscapes of Sri Lanka, which will eventually provide insight into the typological aspects of the possible Sri Lankan tradition of landscape design.
Suzie Thomas - One of the best experts on this subject based on the ideXlab platform.
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nazi memorabilia dark heritage and treasure hunting as alternative tourism understanding the fascination with the Material Remains of world war ii in northern finland
Journal of Field Archaeology, 2016Co-Authors: Suzie Thomas, Oula Seitsonen, Vesapekka HervaAbstract:Sites connected to the Second World War (WWII) are increasingly recognized as worthy of archaeological investigation. Researchers are also becoming aware that that the collectors market in objects connected to WWII, particularly those connected to Germany, is encouraging the stripping of conflict landscapes in the search for “collectors items.” Finnish Lapland is sometimes regarded as peripheral compared to more centrally located regions of Europe. Archaeologists working here nonetheless find themselves in direct competition with enthusiastic treasure hunters. This is complicated even further by the myriad ontologies employed by different individuals in the construction of their relationship with the Material culture connected to recent conflict periods, and on specific “other” or “exotic” landscapes, such as Lapland. This paper examines what might be learnt about the nature of treasure hunting for and trading in WWII Material from Lapland, and its position within the emerging research on broader trends i...
D. Gosset - One of the best experts on this subject based on the ideXlab platform.
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Amorphisation of boron carbide under slow heavy ion irradiation
Journal of Nuclear Materials, 2016Co-Authors: D. Gosset, S. Miro, S. Doriot, N. MoncoffreAbstract:Boron carbide B4C is widely used as a neutron absorber in nuclear plants. Most of the post-irradiation examinations have shown that the structure of the Material Remains crystalline, in spite of very high atomic displacement rates. Here, we have irradiated B4C samples with 4 MeV Au ions with different fluences at room temperature. Transmission electron microscopy (TEM) and Raman spectroscopy have been performed. The Raman analyses show a high structural disorder at low fluence, around 10−2 displacements per atoms (dpa). However, the TEM observations show that the Material Remains crystalline up to a few dpa. At high fluence, small amorphous areas a few nanometers large appear in the damaged zone but the long range order is preserved. Moreover, the size and density of the amorphous zones do not significantly grow when the damage increases. On the other hand, full amorphisation is observed in the implanted zone at a Au concentration of about 0.0005. It can be inferred from those results that short range and long range damages arise at highly different fluences, that heavy ions implantation has drastic effects on the structure stability and that in this Material self-healing mechanisms are active in the damaged zone.
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Amorphisation of boron carbide under slow heavy ion irradiation
Journal of Nuclear Materials, 2016Co-Authors: D. Gosset, S. Miro, S. Doriot, N. MoncoffreAbstract:International audienceBoron carbide B4C is widely used as a neutron absorber in nuclear plants. Most of the post-irradiation examinations have shown that the structure of the Material Remains crystalline, in spite of very high atomic displacement rates. Here, we have irradiated B4C samples with 4 MeV Au ions with different fluences at room temperature. Transmission electron microscopy (TEM) and Raman spectroscopy have been performed. The Raman analyses show a high structural disorder at low fluence, around 10−2 displacements per atoms (dpa). However, the TEM observations show that the Material Remains crystalline up to a few dpa. At high fluence, small amorphous areas a few nanometers large appear in the damaged zone but the long range order is preserved. Moreover, the size and density of the amorphous zones do not significantly grow when the damage increases. On the other hand, full amorphisation is observed in the implanted zone at a Au concentration of about 0.0005. It can be inferred from those results that short range and long range damages arise at highly different fluences, that heavy ions implantation has drastic effects on the structure stability and that in this Material self-healing mechanisms are active in the damaged zone
