Search results for "DF"
showing 10 items of 1699 documents
Modeling red coral (Corallium rubrum) and African snail (Helixia aspersa) shell pigments: Raman spectroscopy versus DFT studies
2016
Pigments from red coral (Corallium rubrum) and African snail (Helixia aspersa) shell were studied non-invasively using Raman spectroscopy with 1064-nm laser beam. The two observed bands because of organic pigments confined in biomineralized CaCO3 matrix at about 1500 and 1100 cm−1 were assigned to ν(C[DOUBLE BOND]C) and ν(C―C), respectively. Both signals originate from polyene(s) of largely unknown structure, containing several conjugated C[DOUBLE BOND]C bonds. The small peak at 1016 cm−1 in the Raman spectrum of coral pigment was assigned to in-plane ―CH3 rocking or structural deformation of polyene chain because of spatial confinement in the mineral matrix. The organic pigments in red cor…
Influence of the process parameters on the microstructure of a hardfacing coating elaborated by hot isostatic pressing
2019
Hot Isostatic Pressing elaboration of Norem02, an austenitic-ferritic hypereutectoid stainless steel, leads to the formation ofan austenitic matrix with a mixture of acicular M7C 3 and globular M23 C 6 carbides. The sintering tests, carried out by using an AISI304L container, showed that the final microstructure and the carbides’ distribution of the HIPed Norem02 are strongly influencedby the process parameters (heating and cooling rate, sintering time, holding temperature and pressure) and by the particles’ size,microstructure and phase distribution of the initial powder. The morphological, crystallographic and chemical analysis of the sinteredsamples were completed by comprehension of the…
Grid-Following and Grid-Forming MODELS in ATP-EMTP for Power Systems Simulation
2022
The paper presents the models of grid-following and grid-forming converters in the software ATP-EMTP for power systems simulation. The models are developed using the MODELS language, they are described in details discussing all issues and aspects related to the implementation, and they are also shared as open source models. The models are validated with a simulation-based approach, comparing the results with the models developed in MATLAB/Simulink and in NEPLAN, considering both the phasor RMS and EMT time domains, and thus performing a comprehensive cross-platform and cross-domain validation. In line with the spirit of the ATP software and community, the models of grid-following and grid-f…
Modelling Environmental Problem-Solving Through STEAM Activities : 4Dframe's Warka Water Workshop
2016
In this paper the Korean 4Dframe educational modelling kit’s rich capacities are presented within a STEAM (Science, Technology, Engineering, Arts and Mathematics) education workshop. The workshop is an adaptation of the Warka Water social design project, launched by the architect Arturo Vittori in response to Ethiopia’s diminished sources of drinking water. Participants of the workshop will study the geometry of the Warka Water tower and understand its water harvesting technique, which is based on collecting water from the air. peerReviewed
Modelling Environmental Problem-Solving Through STEAM Activities : 4Dframe's Warka Water Workshop
2016
Crowdfunding performance, market performance, and the moderating roles of product innovativeness and experts' judgment: Evidence from the movie indus…
2023
Reward-based crowdfunding (CF) has emerged as a method to solicit funds for innovative projects. Yet, little is still known about the ability of reward-based CF to act as a signal in the eyes of future consumers, and thus boost the future market performance of new products that innovators intend to commercialize using the campaign funds. In addition, scant research has clarified the boundary conditions that can magnify or weaken the efficacy of this CF signal. Given the relevance of reward-based CF for supporting innovation, understanding when the CF campaign performance works as an effective signal is of great interest, especially in business settings characterized by high product quality …
Propan-2-ol dehydration on acidic zeolite fragments: a DFT study
2008
Beneficios de una intervención basada en mindfulness y compasión en la formación de los psicólogos clínicos y sanitarios. Aumento de la empatía y los…
2019
Esta tesis doctoral surge del interés en investigar si la práctica de mindfulness puede ayudar a entrenar actitudes y habilidades que son esenciales en el ejercicio profesional de los psicólogos clínicos y sanitarios, enfocándose específicamente en la empatía. Se incluyen varios estudios de revisión bibliográfica sobre la importancia de mindfulness, empatía y compasión en el ámbito de la psicoterapia. Así mismo, se analiza la influencia de una intervención basada en mindfulness y compasión (IBMC) en la empatía en estudiantes de psicología clínica y de la salud, y se estudian sus efectos en la creatividad verbal, al ser una habilidad que puede estar interviniendo en la evolución de la empatí…
Il ruolo educativo della psicomotricità in età evolutiva: il vissuto dei Genitori e dei Docenti
2018
La nozione di "schema corporeo" a partire dagli anni Sessanta, trova spazio tra gli obiettivi e le finalità riferiti all'educazione motoria e fisica a scuola. Attraverso i contributi della psicomotricità di P. Vayer, P. Aucouturier, J. Le Boulch, si fanno strada principi educativi e metodologici che vedono l'Educazione del e attraverso il corpo quale strumento fondamentale di conoscenza di sé, di un metodo di apprendimento che coinvolge in egual misura l'emozionale e il cognitivo. Il suo graduale riconoscimento quale centro di identità da cui parte ogni esperienza, ha dato luogo ad una crescente attenzione alle potenzialità conoscitive del corpo, ma anche di quelle espressive delle emozioni…
Modification of PVDF nanoparticles by controlled free radical graft copolymerization in supercritical carbon dioxide
2014
PVDF (polyvinylidenefluoride) membranes are widely used in microfiltration (MF) and ultrafiltration (UF) due to their excellent processability, chemical resistance, well-controlled porosity, and good thermal properties [1]. Moreover this polymer is also frequently adopted in bio-medical devices owing to its good biocompatibility [2]. On the other hand, the use of PVDF membranes in biomedical applications is limited to some extent by the hydrophobicity of their exposed area, which mainly arises from the nature of the pore surface. Prompted by these considerations in the present work we have studied the modification of PVDF nanoparticles with hydroxyethylmethacrylate (HEMA) thus obtaining a m…