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See detailIndo-European Meat and Flesh. Semantic Typology and Reconstruction.
Mersch, Sam UL

Bachelor/master dissertation (2017)

The thesis looks into generic words for meat and flesh through out the Indo-European languages and tries to establish a semantic typology and reconstruction for the word for the concept for meat.

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See detailOpen Mobility System OMOS : The Joint Journey towards Seamless Mobility
Sümmermann, Dietrich; Öge, Can Daniel; Smolenski, Michael et al

Report (2017)

Digitalization has redefined many aspects of our daily lives and continues to do so. Increasingly, it is also redefining how we perceive and experience mobility and transportation. With this paper, we ... [more ▼]

Digitalization has redefined many aspects of our daily lives and continues to do so. Increasingly, it is also redefining how we perceive and experience mobility and transportation. With this paper, we wish to offer a way of capitalizing on this transformation. It is our shared opinion that, as of today, we will need to build a cooperative new digital mobility infrastructure beyond company borders and across established industries. We thus extend an invitation to contributors from around the globe - companies, scientific and governmental institutions, and commuters - to join us and shape this digital mobility infrastructure together. [less ▲]

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See detailCru et Classé. Impressions de qualités sur le vin français au XIXème siècle.
Mersch, Sam UL

Bachelor/master dissertation (2017)

The thesis looks into perveived impressions on French wine in the 19th century from a French perspective. It looks into how specific qualitites, and the idea of terroir, are attested to wine in order to ... [more ▼]

The thesis looks into perveived impressions on French wine in the 19th century from a French perspective. It looks into how specific qualitites, and the idea of terroir, are attested to wine in order to express nationhood through wine in 19th century France. [less ▲]

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See detailRethinking Short-Term Electricity Market Design : Options for Market Segment Integration
Rieß, Susanne; Neumann, Christoph; Glismann, Samuel et al

in 14th International Conference on the European Energy Market (2017)

Electricity market design varies across countries throughout Europe. Thereby the provision and remuneration of flexibility always takes place in short-term market segments. Taking into consideration the ... [more ▼]

Electricity market design varies across countries throughout Europe. Thereby the provision and remuneration of flexibility always takes place in short-term market segments. Taking into consideration the fundamental changes of the power system, this paper discusses options for the future short-term market design. We develop a conceptual basis for a possible integration of currently separated short-term market segments. Market segment integration (MSI) is defined as the interaction between and possible combination of market segments, i.e. intraday market (ID), congestion management (CM) and balancing market (BA). The paper especially focusses on two options, namely an integrated BA and CM market and an integrated ID and CM market. For these options we determine the basic design features. We propose a criteria catalogue which allows the evaluation of the market design options. Based on several criteria we discuss possible positive and negative consequences as well as potential solutions. [less ▲]

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See detailFighting fascism and the passivity myth
Zaagsma, Gerben UL

Article for general public (2017)

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See detailControl of surface potential at polar domain walls in a nonpolar oxide
Nataf, G. F.; Guennou, Mael UL; Kreisel, Jens UL et al

in PHYSICAL REVIEW MATERIALS (2017), 1(7),

Ferroic domain walls could play an important role in microelectronics given their nanometric size and often distinct functional properties. Until now, devices and device concepts were mostly based on ... [more ▼]

Ferroic domain walls could play an important role in microelectronics given their nanometric size and often distinct functional properties. Until now, devices and device concepts were mostly based on mobile domain walls in ferromagnetic and ferroelectric materials. A less explored path is to make use of polar domain walls in nonpolar ferroelastic materials. Indeed, while the polar character of ferroelastic domain walls has been demonstrated, polarization control has been elusive. Here, we report evidence for the electrostatic signature of the domain-wall polarization in nonpolar calcium titanate (CaTiO3). Macroscopic mechanical resonances excited by an ac electric field are observed as a signature of a piezoelectric response caused by polar walls. On the microscopic scale, the polarization in domain walls modifies the local surface potential of the sample. Through imaging of surface potential variations, we show that the potential at the domain wall can be controlled by electron injection. This could enable devices based on nondestructive information readout of surface potential. [less ▲]

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See detailConductivity and Local Structure of LaNiO3 Thin Films
Fowlie, Jennifer; Gibert, Marta; Tieri, Giulio et al

in ADVANCED MATERIALS (2017), 29(18),

A marked conductivity enhancement is reported in 6-11 unit cell LaNiO3 thin films. A maximal conductivity is also observed in ab initio calculations for films of the same thickness. In agreement with ... [more ▼]

A marked conductivity enhancement is reported in 6-11 unit cell LaNiO3 thin films. A maximal conductivity is also observed in ab initio calculations for films of the same thickness. In agreement with results from state of the art scanning transmission electron microscopy, the calculations also reveal a differentiated film structure comprising characteristic surface, interior, and heterointerface structures. Based on this observation, a three-element parallel conductor model is considered and leads to the conclusion that the conductivity enhancement for films of 6-11 unit cells, stems from the onset of intercompetition between the three local structures in the film depth. [less ▲]

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See detailFinite-strain Landau theory applied to the high-pressure phase transition of lead titanate
Troester, A.; Ehsan, S.; Belbase, K. et al

in PHYSICAL REVIEW B (2017), 95(6),

Standard Landau theory coupled to infinitesimal strain allows a concise description of the temperature-driven ferroelectric tetragonal-to-cubic phase transition in PbTiO3 at ambient pressure ... [more ▼]

Standard Landau theory coupled to infinitesimal strain allows a concise description of the temperature-driven ferroelectric tetragonal-to-cubic phase transition in PbTiO3 at ambient pressure. Unfortunately, it fails to cover its high-pressure counterpart at ambient temperature. For example, the experimental transition pressure is vastly underestimated and neither the change from first to second order with increasing pressure nor the unusual pressure dependence of the tetragonal unit cell parameters observed in experiment are reproduced. Here we demonstrate that a combination of density functional theory and a recently constructed finite-strain extension of Landau theory provides a natural mechanism for resolving these discrepancies between theory and experiment. Our approach also allows us to determine the full tetragonal-cubic phase boundary in the (P,T) plane including an estimate of the tricritical point. We show that a careful analysis of the thermal elastic baseline is an essential ingredient to the success of this theory. [less ▲]

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See detailRules and mechanisms governing octahedral tilts in perovskites under pressure
Xiang, H. J.; Guennou, Mael UL; Iniguez, Jorge et al

in PHYSICAL REVIEW B (2017), 96(5),

The rotation of octahedra (octahedral tilting) is common in ABO(3) perovskites and relevant to many physical phenomena, ranging from electronic and magnetic properties, metal-insulator transitions to ... [more ▼]

The rotation of octahedra (octahedral tilting) is common in ABO(3) perovskites and relevant to many physical phenomena, ranging from electronic and magnetic properties, metal-insulator transitions to improper ferroelectricity. Hydrostatic pressure is an efficient way to tune and control octahedral tiltings. However, the pressure behavior of such tiltings can dramatically differ from one material to another, with the origins of such differences remaining controversial. In this paper we discover several new mechanisms and formulate a set of simple rules that allow us to understand how pressure affects oxygen octahedral tiltings via the use and analysis of first-principles results for a variety of compounds. Besides the known A-O interactions, we reveal that the interactions between specific B ions and oxygen ions contribute to the tilting instability. We explain the previously reported trend that the derivative of the oxygen octahedral tilting with respect to pressure (dR/dP) usually decreases with both the tolerance factor and the ionization state of the A ion by illustrating the key role of A-O interactions and their change under pressure. Furthermore, three new mechanisms/rules are discovered, namely that (i) the octahedral rotations in ABO(3) perovskites with empty low-lying d states on the B site are greatly enhanced by pressure, in order to lower the electronic kinetic energy; (ii) dR/dP is enhanced when the system possesses weak tilt instabilities, and (iii) for the most common phase exhibited by perovskites-the orthorhombic Pbnm state-the in-phase and antiphase octahedral rotations are not automatically both suppressed or both enhanced by the application of pressure because of a trilinear coupling between these two rotation types and an antipolar mode involving the A ions. We further predict that the polarization associated with the so-called hybrid improper ferroelectricity could be manipulated by hydrostatic pressure by indirectly controlling the amplitude of octahedral rotations. [less ▲]

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See detailDie zwei Kulturen in Bildungsforschung und Bildungspolitik
Lenz, Thomas UL

Presentation (2017)

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See detailValidation of a Chinese version of the Geriatric Anxiety Scale among community-dwelling older adults in mainland China.
Lin, X.; Lu, D.; Gottschling, Juliana UL et al

in Journal of Cross-Cultural Gerontology (2017), 32

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See detailIntractable conflicts in Africa: The international response to the Darfur and South Sudan crises
Owiso, Owiso UL; Boshoff, Elsabé; Mamhare, Tapiwa et al

in Global Campus Human Rights Journal (2017), 1(2), 287-314

This article considers the intractable conflicts and human rightssituations in Darfur, Sudan and South Sudan, respectively, against theinternational responses they elicited. Intractable conflicts are ... [more ▼]

This article considers the intractable conflicts and human rightssituations in Darfur, Sudan and South Sudan, respectively, against theinternational responses they elicited. Intractable conflicts are conflicts that havelasted for a long time with resistance to settlement despite various attempts atintervention and conciliation. These conflicts from neighbouring nations haveboth elicited extensive engagement from the international and regionalcommunities but, while some clarity regarding the direction to be taken has beenachieved in the case of South Sudan, the situation in Darfur remains dire. Thearticle analyses the difference in the peace-building approaches in the twoconflicts and how these approaches have contributed to the different outcomes inDarfur and South Sudan. Following an exposition of intractability in theintroduction, the second section applies the factors identified to the case ofDarfur, confirming that this indeed is an intractable situation. It then considersthe international response to the conflict in Darfur and the mechanismsemployed by the global and the regional community in an attempt to addressthis conflict. The third section considers the situation in South Sudan and theinternational response, noting that efforts were led by the regional and sub-regional bodies, with the UN’s role being to complement these efforts. Themethodology employed is a comparative analysis, in which the internationaland regional legal and institutional responses to the crisis in South Sudan areanalysed with a view to identifying the lessons to be applied in addressing thesituation in Darfur, utilising theoretical and functional approaches to legal andpolitical interventions. The final section draws from the insights gained incomparing the international response in Darfur and South Sudan, and concludesby attempting to extract general principles about intractability and theeffectiveness of international responses to situations considered to be intractable,noting in particular the importance of regional and sub-regional bodies takingthe lead in efforts to resolve intractable conflicts. [less ▲]

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See detailMulti-Gbps HTTP traffic analysis in commodity hardware based on local knowledge of TCP streams
Vega Moreno, Carlos Gonzalo UL; Roquero, Paula; Aracil, Javier

in Computer Networks (2017), 113

In this paper we propose and implement novel techniques for performance evaluation of web traffic (response time, response code, etc.), with no reassembly of the underlying TCP connection, which severely ... [more ▼]

In this paper we propose and implement novel techniques for performance evaluation of web traffic (response time, response code, etc.), with no reassembly of the underlying TCP connection, which severely restricts the traffic analysis throughput. Furthermore, our proposed software for HTTP traffic analysis runs in standard hardware, which is very cost-effective. Besides, we present sub-TCP connection load balancing techniques that significantly increase throughput at the expense of losing very few HTTP transactions. Such techniques provide performance evaluation statistics which are indistinguishable from the single-threaded alternative with full TCP connection reassembly. © 2017 Elsevier B.V. [less ▲]

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See detailLoginson: a transform and load system for very large-scale log analysis in large IT infrastructures
Vega Moreno, Carlos Gonzalo UL; Roquero, Paula; Leira, Rafael et al

in Journal of Supercomputing (2017), 73(9), 3879-3900

Nowadays, most systems and applications produce log records that are useful for security and monitoring purposes such as debugging programming errors, checking system status, and detecting configuration ... [more ▼]

Nowadays, most systems and applications produce log records that are useful for security and monitoring purposes such as debugging programming errors, checking system status, and detecting configuration problems or even attacks. To this end, a log repository becomes necessary whereby logs can be accessed and visualized in a timely manner. This paper presents Loginson, a high-performance log centralization system for large-scale log collection and processing in large IT infrastructures. Besides log collection, Loginson provides high-level analytics through a visual interface for the purpose of troubleshooting critical incidents. We note that Loginson outperforms all of the other log centralization solutions by taking full advantage of the vertical scalability, and therefore decreasing Capital Expenditure (CAPEX) and Operating Expense (OPEX) costs for deployment scenarios with a huge volume of log data. © 2017, Springer Science+Business Media New York. [less ▲]

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See detailActualising women’s participation in politics and governance in Africa: The case of Kenya and Ghana
Owiso, Owiso UL; Sefah, Bright

in African Human Rights Yearbook (2017), 1

Almost two decades into the 21st century, women are still not accorded a place of prominence in politics and governance, particularly in Africa. Using the examples of Kenya and Ghana, this article ... [more ▼]

Almost two decades into the 21st century, women are still not accorded a place of prominence in politics and governance, particularly in Africa. Using the examples of Kenya and Ghana, this article undertakes a critical analysis of the implementation of women’s right to participation in political and decision-making processes in Africa with a view to highlighting progress made, challenges faced and possible solutions to these challenges. Women’s right to participation in political life is enshrined in article 9 of the Protocol to the African Charter on Human and Peoples’ Rights on the Rights of Women in Africa (African Women’s Rights Protocol). The article argues that while some progress has been made towards implementing the above right, much more still needs to be done to achieve effective and transformative participation by women. The progress revealed is mainly in the domestication by national laws of the relevant international obligations. However, the article also notes a significant disconnect between the normative framework and actual participation of women. The two case studies expose an unimpressive lack of political will and persistent societal perceptions, together contributing to the failure to move beyond codification of laws to improvements in actual practice. With lessons learnt from these two countries, this article argues for collaborative effort among African countries to promote genuine intra-Africa learning allowing African states to share experiences, consolidate gains and innovate around common challenges. By so doing, African states can consolidate efforts towards breaking the current inertia and accelerate the actual implementation of article 9 of the African Women’s Rights Protocol. Overall, the article cast a spotlight on the need to refocus debates from standard-setting to actual implementation necessary to achieve transformative equality. [less ▲]

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See detailPan-Africanism and development in the twenty-first century: A critical analysis of the New Partnership for Africa’s Development
Boshoff, Elsabé; Owiso, Owiso UL

in Addaney, Michael; Nyarko, Michael Gyan (Eds.) Ghana @ 60: Governance and human rights in twenty-first century Africa (2017)

In this chapter, we explore the Pan-African influence in the design and implementation of the New Partnership for Africa’s Development (NEPAD) framework with the aim of highlighting the place of Pan ... [more ▼]

In this chapter, we explore the Pan-African influence in the design and implementation of the New Partnership for Africa’s Development (NEPAD) framework with the aim of highlighting the place of Pan-Africanism in twenty-first century regional cooperation and development of Africa. The chapter highlights the strong influence of the Pan-African ideals and thoughts of independent Africa’s founding leaders such as Kwame Nkrumah, Sédar Senghor, Sékou Touré and Kambarage Nyerere in the NEPAD framework. The chapter argues that these ideals are as sound today as they were when they were first articulated. However, it identifies teething challenges in the framework’s implementation such as the misapplication or misconstruction of the Pan-African ideals underpinning NEPAD. As a way forward, the chapter suggests practical ways of objectively auditing NEPAD’s performance by revisiting and recommitting to its Pan-African founding principles. With revitalised Pan-Africanism, the chapter argues that the NEPAD framework can facilitate the rediscovery of the shared aspirations of African peoples to actively participate in the common development and prosperity of Africa. [less ▲]

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See detailProfile formation of academic self-concept in elementary school students in grades 1 to 4
Schmidt, Isabelle; Brunner, Martin UL; Keller, Lena et al

in PLoS ONE (2017), 12(5), 0177854

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