136 research outputs found
Molecule Statistical Thermodynamics Simulation of Nanoindentation of Single Crystal Copper with EAM Potential
No full textThe quasistatic nanoindentation process of a spherical indenter in a single crystal copper is investigated with the molecular statistical thermodynamics (MST) method based on the embedded atom method (EAM) potential. The indentation modulus obtained in the MST simulation is 129.9GPa, which agrees well with the theoretical prediction (129GPa). In the elastic regime, the obtained maximum displacement of the indenter is two times the contact depth and the contact area is qualitatively proportional to the contact depth, which agrees well with Hertzian elastic theory of contact. The MST simulation can reproduce the nucleation of dislocation as well. Moreover, the efficiency of the MST method is about 8 times higher than that of traditional MD simulations
Functional and field performance of epoxy asphalt technology-state-of-the-art
No full textThere is an increasing demand for high strength and more durable materials in the asphalt technology market. In response to the demand, epoxy asphalt mixture (EAM) is one relatively new technology for use as a paving material in flexible pavements. There are various research works carried out on the laboratory and field performance of EAM. However, comprehensive research covering functional and field (F&F) performance of EAM is lacking. The main purpose of this review is to bridge this gap via the analysis of the functional properties of EAM. Consequently, the field performance of EAM in different case studies is reviewed and the serviceability of EAM in various transportation infrastructure is investigated. This paper also reviews the life cycle cost and maintenance of EAM. The major findings indicate that EAM shows superior F&F performance compared to the traditional hot and warm asphalt mixture. Additionally, the use of EAM is beneficial in the structure of pavements in tunnels and on bridge decks. In conclusion, the higher F&F performance of EAM supports the development of better performing pavements for various applications
Open Data in Engineering Asset Management: A Case Study into the possibilities and challenges of using Open Data in Engineering Asset Management
No full textThe use of Open Data (OD) in an Engineering Asset Management (EAM) context is largely unexplored. Even though research into OD is moving forward, this knowledge is not fully usable in EAM because of the complexity and the specific characteristics of EAM. The research is centred around the case study that has taken place. As input for the case study, a literature review has been conducted to summarize and analyse the existing knowledge of OD and EAM. This created a starting point for the case study. A case about the traffic situation around the IJsselbruggen and the VIA15 project (A12) has been selected to research the possibilities to use OD with the goal to evaluate the current traffic measures and investigate the possibilities for Data-Driven Decision Making (DDDM). The combined results of the literature review and the case study have been reviewed by a group of experts in an expert workshop session. Besides there critical opinion about the research, the experts where also asked about their view on the use of OD in the EAM sector.Engineering and Policy Analysi
GeSn/SiGeSn Multiple-Quantum-Well Electroabsorption Modulator With Taper Coupler for Mid-Infrared Ge-on-Si Platform
No full textWe propose a taper coupler electroabsorption modulator (EAM) composed of GeSn/SiCeSn multiple-quantum-well (MQW) on Ge-on-Si platform for mid-infrared (2 mu m) integrated optical active devices. The epitaxial design is performed by calculating the absorption spectra of GeSn/SiGeSn MQW using many-body theory to investigate the extinction characteristics of GeSn MQW waveguides. Two types of taper couplers are considered for connecting Ge-rib waveguide and GeSn-MQW-highmesa waveguide efficiently. One is an adiabatic taper coupler (ATC) type EAM and it is useful for thin Ge-buffer structure in terms of the extinction ratio. Another is a resonant taper coupler (RTC) type EAM and it is superior to ATC type EAM for thick Ge-buffer. It is confirmed that RTC type EAM can obtain the high extinction characteristics with low-loss and shorter device length (6.87 dB, -3.97 dB, and 215 mu m) compared with conventional ATC type EAM for thick Ge-buffer (5.67 dB, -4.9 dB, and 340 mu m)
Dangerous Liaisons: Relationships between design, craft and art
No full textThe introductory essay [co-authored] examines the background and current interconnections between design, craft and the fine arts. This Special Issue was able to expand the debate by showing how attitudes to materials – from 19C sculpture to current fashion – appropriate craftsmanship to reinvigorate notions of handmaking
Brothers in Arms. The National Liberation Front (EAM) and the Jews of the Greece
No full textThe book is an attempt to describe the relationship between the Eamic resistance movement and the Jewish element of Greece during the Occupation and is formed around the following themes: contacts of Jewish and Eamic resistance organizations from the beginning of the Occupation, contacts during the period of persecution, the grounded experience of survival in Free Greece, the persecution of Jews as communists during the Civil War. The presence of Jews in ELAS is studied separately as a pre-eminent condition for the formation of a resistance Jewish identity. In an attempt to assemble the divergent stories - and periodicals - of the Resistance and the Holocaust into a coherent narrative, the study attempts to outline the participation of Jews in the Eamic Resistance, to record and evaluate in their local and temporal context, specific actions of the EAM during of racial persecution and discuss issues of identity, ideology and memory. The book is both a product of archival and bibliographic research, as well as a study of oral testimonies, part of which were collected by the author himself in the framework of the periodical exhibition "Competitor. Greek Jews in the National Resistance "of the Jewish Museum of Greece (EME), 2014-2015, which he curated
Describing the “Integrated” in Integrated Ecosystem Assessments
No full textNo abstracts are to be cited without prior reference to the author. Within the Theme Session: “One size does not fit all – what does an Integrated Ecosystem Assessment mean to YOU?”, multiple perspectives on, approaches to, and interpretations of an integrated ecosystem assessment (IEA) and its components as a key element and foundation for an ecosystem approach to management (EAM), will be presented and discussed. This submission by the session coconveners will serve as an introductory and overview presentation, and will: 1) Examine the role of IEA in EAM. 2) Explore the relationship of 'integrated' ecosystem assessments with and in contrast to more narrow thematic or sectoral assessments towards fully implemented EAM through IEA. This analysis will consider several potential stages of integration, including human dimensions (socio-economic) aspects. We will consider the role of thematic and sector-based assessments within an integrated assessment and suggest an iterative process for IEA production and application towards full EAM
Ab-Initio and Empirical Simulations of Aluminum and Copper Metal
No full textIn this work, I perform detailed calculations on the bulk and electronic properties of aluminum and copper metal. Originally, I was motivated by experimental work on the solidsolid phase changes in pure aluminum. These phase changes were well predicted by density functional theory(DFT) but difficult or impossible to predict using embedded atom method potentials(EAM). EAM potentials are in wide use to describe many properties of bulk materials, and it seemed worrying that something so basic as a phase change could not be predicted. I began running high precision calculations with DFT and compared the results to EAM potentials which had been fit by as many different authors as I could find. Though originally motivated by phase changes, I realized that there had been no systematic work comparing basic material properties predicted by various EAM potentials. In essence, each author fit a potential for a particular problem and then published the potential for general use, but there were few if any guidelines on how to expect each potential to behave in general.
Thus this work. I have systematically examined the predictions for 11 EAM potentials for a number of bulk material properties, including stiffness, phase changes, thermal expansion, melting point and viscosity. This work may contribute to cross-validation efforts among those researchers using EAM and may also shed light upon where, and why, EAM potentials fail to perform as desired
Responsiveness of residential electricity demand to dynamic tariffs: Experiences from a large field test in the Netherlands
No full textAbstractTo efficiently facilitate the energy transition it is essential to evaluate the potential of demand response in practice. Based on the results of a Dutch smart grid pilot, this paper assesses the potential of both manual and semi-automated demand response in residential areas. To stimulate demand response, a dynamic tariff and smart appliances were used. The participating households were informed about the tariff day-ahead through a home energy management system, connected to a display installed on the wall in their living room. The tariff was intuitively displayed: self-consumption of photovoltaic generation was stimulated by means of a low tariff, but also the generation itself played a central role on the display. Household flexibility is analyzed, focusing on: (i) the load shift of (smart) appliances, and (ii) the response of the (overall) peak load towards the dynamic tariff. To assess the latter, i.e. price responsiveness, the participants were split up in two comparable groups which were subject to a different moment of evening peak-pricing. Based on the results, it is concluded that mainly the flexibility of the white goods (i.e. the washing machine, tumble dryer and dishwasher) is used for demand response. The main part of the flexible load of these (smart) appliances is shifted from the evening to the midday, to match local generation. This load shift remained stable over a long period of time (>1year) and is not responsive to the exact moment of peak-pricing. Therefore, it is concluded that a simple and transparent design for dynamic tariffs is sufficient and most effective to stimulate (manual) residential demand response. Such a tariff should emphasize the ‘right’ moments to use electricity, intuitively linked to renewable generation
Bayesian Data Analysis with JASP
No full textMaterials for the course "Bayesian Data Analysis with JASP", originally developed for the European Association of Methodology (EAM) in 2025.
Author (Oscar Lecuona) is Assistant Professor at Complutense University of Madrid (UCM
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