Completely integrable systems on hamiltonian mechanics

Treballs Finals de Grau de Matemàtiques, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2018, Director: Ignasi Mundet i Riera[en] During the last two centuries, the study of mechanics has enjoyed a remarkable evolution, in parallel with one of its main mathematical tools: symplectic geometry. In this text, some of the most important notions have been gathered for the understanding of the Liouville-Arnold Theorem on completely integrable systems. The final goal of this project is to give a new approach to this fundamental result; thus the theory presented is appropriately nourished with humble examples to be analyzed. During the work previous to the final composition, several sources about both the main and many neighboring topics had to be studied. The tools given here can bring interested readers to the further study of gigantic problems such as the restricted three body problem, perturbation theory, and infinite dimensional integrable systems

Variational Quantum Classifier

Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2019, Tutor: José Ignacio LatorreIn this work we propose a quantum alternative to Artificial Neural Networks in classification tasks. We design a set of different neural networks and quantum circuits and test their performances. We found that a Variational Quantum Classifier can outperform a classical model using far less free parameters and, thus, being more eficient. Further, a complex classification task requires deeper quantum circuits, which nevertheless grow at a slower pace than the number of neurons needed in a Neural Network for the same task

Experiences and Perceived Effects of Rosary Praying: A Qualitative Study

The aim of this study is to explore experiences and perceived effects of the Rosary on issues around health and well-being, as well as on spirituality and religiosity. A qualitative study was conducted interviewing ten Roman Catholic German adults who regularly practiced the Rosary prayer. As a result of using a tangible prayer cord and from the rhythmic repetition of prayers, the participants described experiencing stability, peace and a contemplative connection with the Divine, with Mary as a guide and mediator before God. Praying the Rosary was described as helpful in coping with critical life events and in fostering an attitude of acceptance, humbleness and devotion

A literature review of the use of gamification in accounting education

[EN] Gamification is a tool that is increasingly used in the field of teaching at all levels of education, from primary to university. Despite the fact that Business Management and Accounting have not remained on the sidelines in studies on the use of game-based learning, the scarcity of such work in this field provides us with only a limited vision of the research that is being carried out in the area. In order to fill this research gap, this paper analyses the academic literature in detail on the use of gamification in accounting education. To this end, an in-depth review of scientific documents retrieved from academic databases has been carried out with the aim of: a) identifying the methodologies used in the research, b) examining the types of games used by researchers, c) establishing the different educational stages where this research is being carried out, d) analysing the samples used, and e) analysing the results obtained in the studies. The results obtained from this review have made it possible to recognise some of the most recurrent work and other research areas in which further exploration can be undertaken within the field of gamification and accounting.Queiro-Ameijieras, CM.; Martí-Parreño, J.; Seguí-Mas, E.; Summerfield, L. (2019). A literature review of the use of gamification in accounting education. IATED. 7662-7667. https://doi.org/10.21125/iceri.2019.1822S7662766

Triple-Decker Pentalene Complex of Iron and Cobalt

In [1(1,2,3,3a,6a-ƞ)-1,4-dihydropentalenyl][µ-1](1,2,3,3a,-6a-ƞ):2(3a,4,5,6,6a-ƞ)-pentalene][2(ƞ5)-pentamethylcyclopentadienyl]cobaltiron, [CoFe(C8H7)Cp*(C8H6)] (Cp*=C10H15), the Cp*-Co and (C8H7)-Fe moieties reside on opposite sides of the fused bridging pentalene ring system

Triple-Decker [Cp*Fe(C8H6)Fe(C8H7)]

The title compound [2(1,2,3,3a,6a-ƞ)pentalene]-[l(ƞ5)-pentamethylcyclopentadienyl]diiron, [Fe2(C8H7)-(C10H15)(C8H6)], has a metallocenic structure with the two pentalene ligands adopting an eclipsed conformation. In the central pentalene ligand, all the peripheral bonds are of similar length whereas the bridge bond is longer; there are two significantly different Fe-C distances, i.e. a mean value of 2.121(3)A for the Fe-Cbridge distances and a mean value of 2.028(3)A for the distances from the Fe atoms to all other Catoms. In the terminal pentalene ligand, the C-C and C-Fe distances in the ring bonded to the Fe atom are all similar

Encapsulation and delivery of mitoxantrone using zirconium-based Metal–Organic Frameworks (MOFs) and their cytotoxic potential in breast cancer cells

Mitoxantrone (MTX) is a drug employed in breast cancer treatment, but its application is largely limited due to side effects. A controlled delivery approach can potentially reduce the side effects. In this study, two zirconium (Zr)-based MOFs, UiO-66 and UiO-66-NH2, were studied for a more controlled delivery of MTX with a 40% and 21% loading capacity, respectively. Characterisation via powder X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectrometry, scanning electron microscopy, and dynamic light scattering confirmed the integrity of structure post-MTX loading. UV–vis spectrophotometry revealed distinctive release profiles, with UiO-66-MTX exhibiting a 25% cumulative release after 96 h in water and 120 h in PBS +10% FBS. UiO-66-NH2-MTX displayed a more sustained release, reaching 62% in water and 47% in PBS +10% FBS after 168 h. The interaction between MTX and the MOFs was also proposed based on com-putational modelling, suggesting a stronger interaction of UiO-66NH2 and MTX, and an optimised interaction of MTX in the tetrahedral and octahedral pores of the MOFs. The study also reports the release profile of the drug and antiproliferative activity against a panel of breast cancer cell lines (MDA-MB-231, MDA-MB-468, and MCF7) and a normal breast epithelial cell line (MCF10A). MTX-encapsulated MOFs were thoroughly characterised, and their biological activity was assessed in vitro. MTT cell viability assay indicated a higher IC50 value for MTX-loaded MOFs compared to free MTX in physiological conditions, albeit with a slower release profile. These findings suggest the potential of these MTX-loaded MOFs as an alternative avenue for formulation to mitigate side effects