Solar X-rays from Axions: Rest-Mass Dependent Signatures

The spectral shape of solar X-rays is a power law. The more active the Sun is, the less steep the distribution. This behaviour can be explained by axion regeneration to X-rays occurring ~400km deep into the photosphere. Their down-comptonization reproduces the measured spectral shape, pointing at axions with rest mass m_a~17 meV/c2, without contradicting astrophysical-laboratory limits. Directly measured soft X-ray spectra from the extremely quiet Sun during 2009 (SphinX mission), though hitherto overlooked, fitt the axion scenario.Comment: To appear in Proceedings of the 5th Patras Axion Workshop, Durham 200

Signatures for Solar Axions/WISPs

Standard solar physics cannot account for the X-ray emission and other puzzles, the most striking example being the solar corona mystery. The corona temperature rise above the non-flaring magnetized sunspots, while the photosphere just underneath becomes cooler, makes this mystery more intriguing. The paradoxical Sun is suggestive of some sort of exotic solution, axions being the (only?) choice for the missing ingredient. We present atypical axion signatures, which depict solar axions with a rest mass max ~17 meV/c2. Then, the Sun has been for decades the overlooked harbinger of new particle physics.Comment: To appear in the proceedings of the 6th Patras Workshop, Zurich 5-9 July 201

Impact of Conformational Effects on the Ring–Chain Equilibrium of Hydrogen-Bonded Dinucleosides

This is the peer reviewed version of the following article: Chemistry - A European Journal 24.46 (2018): 11983-11991, which has been published in final form at https://doi.org/10.1002/chem.201801704 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived VersionsSupramolecular ring-versus-chain equilibria are ubiquitous in biological and synthetic systems. Understanding the factors that decide whether a system will fall on one side or the other is crucial to the control of molecular self-assembly. This work reports results with two kinds of dinucleoside monomers, in which the balance between closed cycles and open polymers is found to depend on subtle factors that rule conformational equilibria, such as steric hindrance, intramolecular interactions, or π-conjugation pathwaysFunding from the European Research Council (ERC-StG 279548) and MINECO (CTQ2014-27729-P and CTQ2017-84727-P) is gratefully acknowledged (DGR). CFG gratefully acknowledges financial support from the Netherlands Organization for Scientific Research NWO (ECHO

A study of the biopsychosocial rehabilitation of patients with myocardial infarction six months after their discharge from the Cardiac Care Unit

Background: Acute myocardial infarction is one of the leading causes of death in the developed world. The purpose of this research is to study the biopsychosocial rehabilitation of patients with myocardial infarction six months after their release from the heart attack unit. Method and Material: The population of the study consisted of patients who had suffered a myocardial infarction and had been hospitalized in the heart attack unit of a University General Hospital six months ago. The study sample was 100 patients. The sampling method is simple randomization. Results: Problems of anxiety and sadness with a percentage of 50% are in first place, followed by problems of pain and discomfort at a percentage of 24%, problems in performing usual daily activities at a percentage of 22%, mobility problems at a percentage of 16 % and finally the problems of self-care at a rate of 12%. There is a statistically significant difference between genders, with men being more affected with mobility problems (p-value= 0.014) and with performing usual activities (/p-value= 0.003). Patients who are ≤65 years of age appeared to be more affected compared to those >65 years of age in terms of mobility problems (/p-value= 0.009). Conclusions: Quality of life improves for most patients after myocardial infarction. Whether or not patients have problems on one or more dimensions of the EQ-5D is highly related to the patient's profile. Fewest problems are observed in the self-care dimension and most problems are reported in the anxiety or sadness dimension

Search for low Energy solar Axions with CAST

We have started the development of a detector system, sensitive to single photons in the eV energy range, to be suitably coupled to one of the CAST magnet ports. This system should open to CAST a window on possible detection of low energy Axion Like Particles emitted by the sun. Preliminary tests have involved a cooled photomultiplier tube coupled to the CAST magnet via a Galileian telescope and a switched 40 m long optical fiber. This system has reached the limit background level of the detector alone in ideal conditions, and two solar tracking runs have been performed with it at CAST. Such a measurement has never been done before with an axion helioscope. We will present results from these runs and briefly discuss future detector developments.Comment: Paper submitted to the proceedings of the "4th Patras Workshop on Axions, WIMPs and WISPs", DESY, Hamburg Site - Germany, 18-21 June 2008. Author affiliations are reported on the title page of the paper. In version 2: 1 affiliation change, 3 references adde

Solar axion search with the CAST experiment

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of an LHC dipole. The analysis of the data recorded during the first phase of the experiment with vacuum in the magnet pipes has resulted in the most restrictive experimental limit on the coupling constant of axions to photons. In the second phase, CAST is operating with a buffer gas inside the magnet pipes in order to extent the sensitivity of the experiment to higher axion masses. We will present the first results on the $^{4}{\rm He}$ data taking as well as the system upgrades that have been operated in the last year in order to adapt the experiment for the $^{3}{\rm He}$ data taking. Expected sensitivities on the coupling constant of axions to photons will be given for the recent $^{3}{\rm He}$ run just started in March 2008.Comment: Proceedings of the ICHEP 2008 conferenc

Η (ανα)παράσταση της αφής στην ποίηση της Μάτσης Χατζηλαζάρου και της Μαντώς Αραβαντινού: προς μία ποιητική της απτικότητας

Στην παρούσα Διπλωματική εργασία, μελετάται η σύνολη ποίηση της Μάτσης Χατζηλαζάρου και της Μαντώς Αραβαντινού, μέσα από το πρίσμα της αφής και της απτικότητας, ενώ αυτοί οι δύο άξονες, υπερβαίνοντας την απλή θεματοποίησή τους, ή ένα εμπειριστικό πλαίσιο, διευρευνώνται στον άξονα της Οντολογίας, και δη της Ενδο-οντολογίας. Επίσης, η μελέτη της αφής και της απτικότητας, στις δύο παραδειγματικές περιπτώσεις, αυτές της Χατζηλαζάρου και της Αραβαντινού, διακρίνεται εν προκειμένω από την απλή φαινομενολογική περιγραφή, όπως επίσης προσλαμβάνει γνωσιοθεωρητικές και αισθητικές προεκτάσεις, που συνεπάγονται της εν λόγω αίσθησης, καθώς και των σύστοιχων (απτικών) διαστάσεων. Ωστόσο, ο σκοπός μας δεν είναι απλώς η προβολή ορισμένων φιλοσοφικών-θεωρητικών προπαραδοχών στη σύνολη ποίηση και την ποιητική εν γένει της Χατζηλαζάρου και της Αραβαντινού. Αντιθέτως, διακρίνοντας αυτές τις φιλοσοφικές τάσεις στην ποιητική τους και πρωτίστως στο πλαίσιο μίας ενίστορης θεωρητικής προσέγγισης, υποστηρίζουμε διαμέσου της παρούσας ερμηνευτικής πρότασης, πως η υιοθέτηση της αφής ή της απτικότητας εν γένει, συνιστά το κατάλληλο μεθοδολογικό εργαλείο για τη διερεύνηση της οντολογικής διάστασης στην ποίησή τους. Όπως λ.χ. συμβαίνει και με την έννοια της (ανα)παράστασης/(re-)présentation, συνδυάζοντας έτσι τα κειμενικά δεδομένα με τα ερμηνευτικά μέσα της εργασίας μας. Επομένως, ως στόχος της παρούσας Διπλωματικής Εργασίας, τίθεται η διερεύνηση επιμέρους ζητημάτων όπως αυτό της Οντολογίας, σε συνάρτηση με τη Γνωσιολογία/Γνωσιοθεωρία και την Αισθητική, ξεφεύγοντας έτσι από τις κοινότοπες και προφανείς αντιλήψεις κατά την αντιμετώπιση των αισθήσεων εν γένει, ή ακόμα κατά την προσέγγιση της συναισθησίας, των πολυαισθητηριακών αντιδράσεων, ειδικότερα της αφής και της απτικότητας. Μέσω, λοιπόν, της κειμενικής θεμελίωσης και της θεωρητικής πλαισίωσης, επιδιώκουμε τη σύσταση μίας ποιητικής της απτικότητας. Καθώς η παρούσα προσέγγιση συνιστά απλώς μία ερμηνευτική πρόταση ανάμεσα στις διάφορες θεωρητικές προσεγγίσεις ως προς αυτό το ζήτημα που δύνανται να υποστηριχθούν, και αποτελούν αντικείμενο μελλοντικής έρευνας, όπως επίσης και διαφορετικών υποθέσεων εργασίας. Μένουμε επομένως, σε ορισμένες μόνο, ανάλογες μάλιστα προς την αφή και την απτικότητα, πτυχές αυτών των ζητημάτων, στην ποίηση της Χατζηλαζάρου και της Αραβαντινού, καθώς πρόκειται να επιστρέψουμε σε αυτά τα θέματα ερευνητικά.At this master’s thesis, we investigate the total, especially the poetical, work, of Matsi (C)hatzilazarou and Manto Aravantinou, through the scope of touch and tactility, as these two axons surpass the simple thematization, or the common empiricist perceptions about these issues; insisting therefore on the ontological perspective, particularly to this metaphysical domain, which is known as Intra-Ontology. Moreover, this study of touch as well tactility, is here distinct from the simple phenomenological, descriptive approaches, which are very frequent to that issue, while our study gains further gnoseological and aesthetical dimensions. As we recognize them, at the very least, in the poetic idiom of (C)hatzilazarou and Aravantinou. Nevertheless, our main purpose isn’t just to project our philosophical tendencies to their total work as well as in their poetics. On the contrary, we track these philosophical aspects in their poetry and we examine them in a historical but also theoretical frame, through touch and tactility. Because we support that these two axons, comprise the most appropriate methodological tools, so as to get into more depth in all these philosophical issues, e.g. vid. the notion of (re-)présentation in accordance with the touch and tactility; since we combine the textual strata and data, in our master’s thesis, with the necessary hermeneutic tools. Hence the aim of our master’s thesis, is to investigate single partial themes, such as that of Ontology, in relation to Gnoseology and Aesthetics, though touch and tactility, evading so the common-viewed and superficial enough, perceptions, about the sensual issues, the syn(a)esthesia, the multi-sensory re-actions, and especially about the touch and tactile/haptic modalities. Consequently, through that close reading and the necessary theoretical reframing of our textual data, we aim to construct a specific poetical theory about tactility, among other theoretical approaches, which however consist the object of future research and relative case studies. So, at the moment, we just stay here, at that departure point, for future research, though profoundly correlated to these perceptions about touch and tactility, in (C)hatzilazarou’s and Aravantinou’s poetry