cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Социальные и науковедческие аспекты в научном наследии Н. И. Вавилова (к 130-летию со дня рождения)
Creators: name: Манойленко К.В.
Publisher: name: Социология науки и технологий
Year: 2017
Subjects: Н.И. ВАВИЛОВ
ВОЗДЕЛЫВАЕМЫЕ РАСТЕНИЯ
НАУКОВЕДЧЕСКИЕ ИДЕИ
РЕКОМЕНДАЦИИ
ПРОИЗВОДИТЕЛЬНЫЕ СИЛЫ
СОЦИОЛОГИЧЕСКИЕ ДАННЫЕ
ЭКСПЕДИЦИИ
АФГАНИСТАН
ИСПАНИЯ
КИТАЙ
ЯПОНИЯ
VAVILOV CULTIVATED PLANTS
SCIENTIFIC IDEAS
RECOMMENDATIONS
PRODUCTIVE FORCES
SOCIOLOGICAL DATA
EXPEDITION
AFGHANISTAN
SPAIN
CHINA
JAPAN

description: В статье, посвященной известному генетику, растениеводу, путешественнику академику Н.И. Вавилову, сделан акцент на материалах социоэкономической и науковедческой направленности. Определена связь с его исследованиями по изучению центров происхождения культурных растений, научно-организационной деятельностью. Проанализированы итоги экспедиций Вавилова в Афганистан, страны Азии, Средиземноморья, обогатившие познания ученых в отношении земледелия и растительных ресурсов мира. Учтены путевые заметки в плане обычаев, организации быта культуры населения. Обращается внимание на систему взглядов Вавилова по развитию агрономической науки, ее интенсификации, на модель построения опытных станций, исследовательских институтов, высшей школы.The article is dedicated to a geneticist, grower, and traveller academician N.I. Vavilov. The emphasis is put on socio-economic and scientific materials. The link between his studies of the centers of cultivated plants origin and scientific-organizational activity is defined. The results of Vavilov’s expeditions in Afghanistan, countries of Asia, the Mediterranean, enriched the scientific knowledge concerning agriculture and plant resources of the world, are presented. The travel notes are taken into account in terms of the customs, the welfare culture of the population. The attention is drawn to Vavilov’s belief system to the development of agronomic science, its intensification, and the model of construction of experimental stations, research institutes, and higher school.
Tar-Baby : a novel
Creators: name: Villegas-Verrone, Patric
Publisher: name: No Publisher Supplied
Year: 2024

description: TAR-BABY is a novel that utilizes folklore and speculative storytelling to tackle issues of community displacement, generational trauma within Black American communities, and self-definition in a society that antagonizes otherness. In this contemporary reimagining of the Tar Baby folktale, a young Black woman named Baby appears in a gentrified Midwestern neighborhood in the midst of a political battle between the older, white patriarch Eugene Fox and a young, charismatic Black man named Lucky Foote. After touching Baby, Lucky becomes preternaturally drawn to her. When Baby comes into contact with others in the neighborhood, she finds them similarly desperate to touch her. Seeking answers, Baby learns a devastating secret about her origins that forces her to wrestle with her humanity and sense of self.
How much randomness is needed for statistics?
Creators: name: Kjos-Hanssen, Bjørn
name: Taveneaux, Antoine
name: Thapen, Neil
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03D

description: In algorithmic randomness, when one wants to define a randomness notion with respect to some non-computable measure $λ$, a choice needs to be made. One approach is to allow randomness tests to access the measure $λ$ as an oracle (which we call the "classical approach"). The other approach is the opposite one, where the randomness tests are completely effective and do not have access to the information contained in $λ$ (we call this approach "Hippocratic"). While the Hippocratic approach is in general much more restrictive, there are cases where the two coincide. The first author showed in 2010 that in the particular case where the notion of randomness considered is Martin-Löf randomness and the measure $λ$ is a Bernoulli measure, classical randomness and Hippocratic randomness coincide. In this paper, we prove that this result no longer holds for other notions of randomness, namely computable randomness and stochasticity.
description: Preliminary version in: Computability in Europe, Lecture Notes in Computer Science 7318, Springer, Berlin, 2012, 395--404
title: Η διερεύνηση της σχέσης ανάμεσα στην ποιότητα των υπηρεσιών και της ανεπίσημης προφορικής επικοινωνίας, πελατών προγραμμάτων υπαίθριων δραστηριοτήτων αναψυχής
titleType: AlternativeTitle
Creators: name: Πρίμπα, Ελένη
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΑΝΑΨΥΧΗ -- ΔΙΟΙΚΗΣΗ ΚΑΙ ΟΡΓΑΝΩΣΗ
subject: ΧΩΡΟΙ ΑΘΛΗΣΗΣ -- ΑΞΙΟΛΟΓΗΣΗ

description: Σκοπός: Να διερευνηθεί α) η διαφοροποίηση των παραγόντων της ποιότητας των υπηρεσιών (Π.Υ.) που παρέχονται, σε ένα κέντρο υπαιθρίων δραστηριοτήτων (Κ.Υ.Δ.), ανάλογα με τα διαφορετικά δημογραφικά χαρακτηριστικά των πελατών-επισκεπτών και β) η σχέση των παραγόντων της Π.Υ. με την έννοια της «ανεπίσημης προφορικής επικοινωνίας» (WOM). Μέθοδος: Συμμετείχαν 322 άτομα που επισκέφθηκαν το Saloon Park (Κ.Υ.Δ.) σε διάστημα τεσσάρων διημέρων και συμπλήρωσαν πλήρως τα ερωτηματολόγια που τους δόθηκαν. Για τη μέτρηση της Π.Υ. χρησιμοποιήθηκε το μοντέλο SERVQUAL (Parasuraman et al. 1988) (22 στοιχεία), για το προσδοκώμενο αποτέλεσμα χρησιμοποιήθηκε κλίμακα των Brady και Cronin (2001) (7 στοιχεία), οι προθέσεις των πελατών μετρήθηκαν με κλίμακα τριών στοιχείων των Ajzen et al. (1977), για την εκτίμηση των WOM χρησιμοποιήθηκε το ερωτηματολόγιο των Alexandris et al. (2002), ενώ τέλος η ικανοποίηση των πελατών μετρήθηκε με μια κλίμακα τριών στοιχείων του Oliver (1980). Αποτελέσματα: Η μεταβλητή του προσδοκώμενου αποτελέσματος διαφοροποιήθηκε σημαντικά σε σχέση με το φύλο (ρ<0.022), την ηλικία (ρ<0.034), τη συντροφιά (ρ<0.007) και την επαγγελματική κατάσταση (ρ<0.005). Από τους παράγοντες της Π.Υ. η εμπάθεια και η ασφάλεια επηρεάστηκαν από την οικονομική κατάσταση (ρ<0.014, ρ<0.021 αντίστοιχα), ενώ η αξιοπιστία από το επάγγελμα (ρ<0.021). Τέλος η μεταβλητή χειροπιαστά είναι υπεύθυνη για το 12% της πρόβλεψης των WOM ενώ η εμπάθεια για ένα 3%. Συμπεράσματα: Το μοντέλο SERVQUAL είναι κατάλληλο για την εκτίμηση της ποιότητας των παρεχόμενων υπηρεσιών σε υπαίθριες δραστηριότητες αναψυχής. Το προσδοκώμενο αποτέλεσμα εκτιμήθηκε καλύτερα με το μοντέλο των Brady και Cronin (2001).
DOPAMINE: Doppler frequency and Angle of arrival MINimization of tracking Error for extended reality
Creators: name: Bedin, Andrea
name: Marinšek, Alexander
name: Shahcheraghi, Shaghayegh
name: Gholian, Nairy Moghadas
name: Van der Perre, Liesbet
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: In this paper, we investigate how Joint Communication And Sensing (JCAS) can be used to improve the Inertial Measurement Unit (IMU)- based tracking accuracy of eXtended Reality (XR) Head-Mounted Displays (HMDs). Such tracking is used when optical and InfraRed (IR) tracking is lost, and its lack of accuracy can lead to disruption of the user experience. In particular, we analyze the impact of using doppler-based speed estimation to aid the accelerometer-based position estimation, and Angle of Arrival (AoA) estimation to aid the gyroscope-based orientation estimation. Although less accurate than IMUs for short times in fact, the JCAS based methods require one fewer integration step, making the tracking more sustainable over time. Based on the proposed model, we conclude that at least in the case of the position estimate, introducing JCAS can make long lasting optical/IR tracking losses more sustainable.
description: 6 pages, 5 figures
Ground state and magnetic phase transitions of orthoferrite DyFeO_3
Creators: name: Zhao, Z. Y.
name: Zhao, X.
name: Zhou, H. D.
name: Zhang, F. B.
name: Li, Q. J.
name: Fan, C.
name: Sun, X. F.
name: Li, X. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Low-temperature thermal conductivity (κ), as well as magnetization (M) and electric polarization (P), of multiferroic orthoferrite DyFeO_3 single crystals are studied with H \parallel c. When the crystal is cooled in zero field, M, P, and κall consistently exhibit irreversible magnetic-field dependencies. In particular, with 500 mK < T \le 2 K, all these properties show two transitions at the first run of increasing field but only the higher-field transition is present in the subsequent field sweepings. Moreover, the ultra-low-T (T < 500 mK) κ(H) shows a different irreversibility and there is only one transition when the field is swept both up and down. All the results indicate a complex low-T H-T phase diagram involving successive magnetic phase transitions of the Fe^{3+} spins. In particular, the ground state, obtained with cooling to subKelvin temperatures in zero field, is found to be an unexplored phase.
description: 9 pages, 7 figures, accepted for publication in Phys. Rev. B
A scalable framework for annotating photovoltaic cell defects in electroluminescence images
Creators: name: Otamendi, Urtzi
name: Martinez, Inigo
name: Olaizola, Igor G.
name: Quartulli, Marco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The correct functioning of photovoltaic (PV) cells is critical to ensuring the optimal performance of a solar plant. Anomaly detection techniques for PV cells can result in significant cost savings in operation and maintenance (O&M). Recent research has focused on deep learning techniques for automatically detecting anomalies in Electroluminescence (EL) images. Automated anomaly annotations can improve current O&M methodologies and help develop decision-making systems to extend the life-cycle of the PV cells and predict failures. This paper addresses the lack of anomaly segmentation annotations in the literature by proposing a combination of state-of-the-art data-driven techniques to create a Golden Standard benchmark. The proposed method stands out for (1) its adaptability to new PV cell types, (2) cost-efficient fine-tuning, and (3) leverage public datasets to generate advanced annotations. The methodology has been validated in the annotation of a widely used dataset, obtaining a reduction of the annotation cost by 60%.
description: 10 pages, 10 figures, 1 table, accepted at IEEE Transactions on Industrial Informatics
Hierarchical genomic analysis of susceptibility to schizophrenia in Sudanese multi-case families
Creators: name: saeed, azza
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310509
subject: Genomics

description: This study analyzed the whole genomes/exomes of seven Sudanese families with multiple siblings affected by schizophrenia. We investigated shared variants among family members, including both affected individuals and controls, as well as unique variants shared by patients but not present in the controls. To provide comprehensive information related to this study, we submitted various supplementary materials, including a supplementary table, ethical approval from the official ethics committee, the Standards for Reporting Qualitative Research (SRQR) checklist used to review the methods, the questionnaire used, the written consent form, and a document confirming the study's prior funding by the World Academy of Science.
Explosive synchronization in adaptive and multilayer networks
Creators: name: Zhang, Xiyun
name: Boccaletti, Stefano
name: Guan, Shuguang
name: Liu, Zonghua
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Explosive synchronization (ES) is nowadays a hot topic of interest in nonlinear science and complex networks. So far, it is conjectured that ES is rooted in the setting of specific microscopic correlation features between the natural frequencies of the networked oscillators and their effective coupling strengths. We show that ES, in fact, is far more general, and can occur in adaptive and multilayer networks also in the absence of such correlation properties. Precisely, we first report evidence of ES in the absence of correlation for networks where a fraction f of the nodes have links adaptively controlled by a local order parameter, and then we extend the study to a variety of two-layer networks with a fraction f of their nodes coupled each other by means of dependency links. In this latter case, we even show that ES sets in, regardless of the differences in the frequency distribution and/or in the topology of connections between the two layers. Finally, we provide a rigorous, analytical, treatment to properly ground all the observed scenario, and to facilitate the understanding of the actual mechanisms at the basis of ES in real-world systems.
Calculation of the High-Energy Neutron Flux for Anticipating Errors and Recovery Techniques in Exascale Supercomputer Centres
Creators: name: Asorey, Hernán
name: Mayo-García, Rafael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The age of exascale computing has arrived and the risks associated with neutron and other atmospheric radiation are becoming more critical as the computing power increases, hence, the expected Mean Time Between Failures will be reduced because of this radiation. In this work, a new and detailed calculation of the neutron flux for energies above 50 MeV is presented. This has been done by using state-of-the-art Monte Carlo astroparticle techniques and including real atmospheric profiles at each one of the next 23 exascale supercomputing facilities. Atmospheric impact in the flux and seasonal variations were observed and characterised, and the barometric coefficient for high-energy neutrons at each site was obtained. With these coefficients, potential risks of errors associated with the increase in the flux of energetic neutrons, such as the occurrence of single event upsets or transients, and the corresponding failure-in-time rates, can be anticipated just by using the atmospheric pressure before the assignation of resources to critical tasks at each exascale facility. For more clarity, examples about how the rate of failures is affected by the cosmic rays are included, so administrators will better anticipate which more or less restrictive actions could take for overcoming errors.
description: 23 pages, 6 figures, 2 tables
Photometric and Spectroscopic Observations of GRB 210104A: Bright Reverse shock Emission and Dense Circumburst Environment
Creators: name: Zhang, Lu-Lu
name: Xin, Li-Ping
name: Wang, Jing
name: Han, Xu-Hui
name: Xu, Dong
name: Zhu, Zi-Pei
name: Wu, Chao
name: Wei, Jian-Yan
name: Liang, En-Wei
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Early afterglow observations of gamma-ray bursts (GRBs) are valuable for exploring the properties of their jets and ambient medium. We report our photometric and spectroscopic observations of GRB 210104A and discuss its jet properties with multiwavelength data. Our spectroscopic observation reveals several absorption features and a tentative redshift of 0.46 is identified. A bright optical flare that has a peak brightness of $R=13$ mag at $112\pm 7$~s was observed in the $R$ band during $67\sim 165$ seconds post the GRB trigger. The flux of the $R$-band afterglow decays with a slope of $α_{\rm O}={-0.91\pm 0.03}$ at $t>650$~s. The early X-ray afterglow lightcurve is a smooth bump, and it decays with a slope of $α_{\rm X}=-1.18\pm 0.01$ at late epoch. Our joint spectral fit to the optical-X-ray afterglows during $(1.1-1.3)\times 10^{4}$~s yields a photon index $Γ_{\rm O,X}=-1.82\pm 0.04$. The derived host galaxy extinction is $A_{R}=0.87$. Attributing the early optical flare to the reverse-shock (RS) emission and the late optical-X-ray emission to the forward shock emission; the optical and X-ray lightcurves at $t<3\times 10^4$~s can be well fit adopting an Markov Chain Monte Carlo algorithm. Comparing the properties of GRB 210104A with other GRBs that have detection of bright RS emission, we show that its jet is mildly magnetized ($R_{\rm B}=28$), with high radiation efficiency ($77\%$), is sub-energetic ($E_{\rm k, iso}=4.5\times 10^{51}$ erg), and moderately relativistic ($Γ_0\sim 35$) in a density medium ($n_{0}\sim 417\;{\rm cm}^{-3}$). It follows the tight $L_{γ,\rm iso}-E_{\rm p,z}-Γ_{0}$ relation as with typical GRBs.
description: 17 pages, 5 figures, 2 tables; Accepted for publication in ApJ
title: Η επίδραση ενός προγράμματος δραστηριοτήτων αναψυχής στη βελτιστοποίηση των φυσικών ικανοτήτων σε μαθητές και μαθήτριες γυμνασίου
titleType: AlternativeTitle
Creators: name: Τσαντούλας, Κριστιάν
Publisher: name: University of Thessaly
Year: 2009
Subjects: subject: ΦΥΣΙΚΗ ΚΑΤΑΣΤΑΣΗ ΓΙΑ ΠΑΙΔΙΑ
subject: ΑΝΑΨΥΧΗ

description: Σκοπός της παρούσας έρευνας ήταν να εξετάσει την επίδραση ενός προγράμματος δραστηριοτήτων αναψυχής στη βελτιστοποίηση των φυσικών ικανοτήτων σε μαθητές και μαθήτριες γυμνασίου. Στην έρευνα συμμετείχαν τριάντα (Ν=30) μαθητές και μαθήτριες οι οποίοι υλοποίησαν μια πλήρη σειρά δράσεων και προγραμμάτων αναψυχής. Οι συμμετέχοντες υποβλήθηκαν σε δύο μετρήσεις, στην έναρξη της σχολικής χρονιάς και στο τέλος της. Μεταξύ των δύο μετρήσεων μεσολάβησαν οκτώ (8) μήνες, και στο συγκεκριμένο χρονικό διάστημα έγιναν έξι (6) κύκλοι δραστηριοτήτων αναψυχής σε ποικίλο φυσικό πεδίο. Για την αξιολόγηση της απόδοσής τους χρησιμοποιήθηκαν όργανα μέτρησης και ελέγχθηκαν για την εγκυρότητα περιεχομένου και αξιοπιστία τους. Για την ανάλυση των δεδομένων χρησιμοποιήθηκε περιγραφική στατιστική και ανάλυση ttest για εξαρτημένα και ανεξάρτητα δείγματα. Από τα αποτελέσματα φάνηκε ότι, οι μαθητές και οι μαθήτριες βελτιώθηκαν σε όλες τις φυσικές ικανότητες μετά την ενασχόλησή τους με δραστηριότητες αναψυχής. Πιο συγκεκριμένα παρουσίασαν εμφανή βελτίωση στην αερόβια αντοχή, την μυϊκή αντοχή και την ευκινησία συγκριτικά με την ελάχιστη βελτίωση στην ευλυγισία, καθώς επίσης οι μαθήτριες παρουσίασαν μεγαλύτερη βελτίωση σε σχέση με τους μαθητές στην ευκινησία. Αυτό όμως το οποίο πρέπει να τονισθεί ιδιαίτερα είναι το γεγονός ότι η στάση ζωής, η κινητικότητα και η ψυχολογία των συμμετεχόντων, όχι απλά κινήθηκε σε αύξουσα συνάρτηση, αλλά άγγιξε και τα μέγιστα θετικά, συμπαρασύροντας την ατομική πειθαρχία ενός εκάστου στην εφαρμογή ενός καθημερινού προγράμματος fitness, το οποίο τους δόθηκε. Συμπερασματικά, η εφαρμογή ενός προγράμματος δραστηριοτήτων αναψυχής μπορεί να βελτιώσει την απόδοση των φυσικών ικανοτήτων, κάτι το οποίο και τεκμηριώνω πολλαπλά από τα συνημμένα (πίνακες, ατομικά διαγράμματα, φωτογραφίες).
title: Αξιολόγηση της ποιότητας υπηρεσιών των υπαίθριων δραστηριοτήτων που διοργανώνουν δήμοι του νομού Θεσσαλονίκης
titleType: AlternativeTitle
Creators: name: Βασιάδη, Ζωή
Publisher: name: University of Thessaly
Year: 2009
Subjects: subject: ΑΝΑΨΥΧΗ -- ΔΙΟΙΚΗΣΗ ΚΑΙ ΟΡΓΑΝΩΣΗ
subject: ΧΩΡΟΙ ΑΘΛΗΣΗΣ -- ΑΞΙΟΛΟΓΗΣΗ

description: Οι Οργανισμοί Τοπικής Αυτοδιοίκησης (Ο.Τ.Α), προσφέρουν ποικίλα προγράμματα άθλησης τα οποία προσπαθούν να καλύψουν όλες τις ανάγκες και τις προτιμήσεις των πολιτών και έτσι να συμβάλουν στην αύξηση της αθλητικής συμμετοχής. Η ποιότητα αυτών των υπηρεσιών χρησιμοποιείται για να διαφοροποιήσει και να προσθέσει αξία στις παρεχόμενες υπηρεσίες, ως μέσο για την απόκτηση στρατηγικού ανταγωνιστικού πλεονεκτήματος (Burton 2002). Σκοπός λοιπόν της έρευνας ήταν η αξιολόγηση της ποιότητας των υπηρεσιών που παρέχουν δήμοι της Θεσσαλονίκης (Εύοσμος, Πολίχνη, Αμπελόκηποι), όσον αφορά τις υπαίθριες δραστηριότητες αναψυχής. Επιμέρους σκοπός της έρευνας αποτελεί η διερεύνηση της επίδρασης παραγόντων όπως το φύλο και το δημογραφικό προφίλ των πελατών στις διαστάσεις της ποιότητας υπηρεσιών. Για την διερεύνηση της ποιότητας υπηρεσιών χρησιμοποιήθηκε η κλίμακα ποιότητας υπηρεσιών του Alexandris (2002). Το δείγμα της έρευνας αποτέλεσαν 206 συμμετέχοντες. Η επεξεργασία των δεδομένων αλλά και η ερμηνεία των αποτελεσμάτων έγινε μέσω του excel, στο στατιστικό πακέτο SPSS 11.0. Από την παραγοντική ανάλυση αποκαλύφθηκαν πέντε παράγοντες. Από την ανάλυση διακύμανσης φάνηκε ότι όσον αφορά τους εξωτερικούς παράγοντες υπάρχει σημαντική διαφορά ανάμεσα στα επίπεδα εκπαίδευσης. Όσον αφορά το διοικητικό προσωπικό του δήμου και την αντίληψη για τα προγράμματα σημειώθηκε σημαντική διαφορά ανάμεσα στους άντρες και τις γυναίκες. Τέλος όσον αφορά τους γυμναστές και τις προσωπικές εκτιμήσεις των ασκουμένων, φαίνεται να υπήρξε διαφορά λόγω ηλικίας και φύλου. Συμπερασματικά μπορούμε να πούμε ότι το φύλο των συμμετεχόντων επηρέασε σημαντικά την αντίληψή τους για την ποιότητα των προσφερόμενων υπηρεσιών. Σε αντίθεση με τον παράγοντα της οικογενειακής κατάστασης που δεν έπαιξε κανένα ρόλο.
EUROqCHARM Task 2.1. Summarising the possibilities and needs of candidate Certified Reference Materials for plastic in solid, liquid and gaseous matrices
Creators: name: Leslie, Heather
name: De Boer, Jacob
name: Van der Veen, Ike
Publisher: name: Zenodo
Year: 2023
Subjects: microplastic
Reference Material

description: Worldwide demand for quality assurance and quality control (QA/QC) of analyses of micro- and nanoplastic particles (MNP) in water, air, sediment, biological tissues and other matrices is steadily increasing with awareness, stewardship initiatives and legislation surrounding the issues of plastic particle pollution. A key QA/QC tool is the certified reference material (CRM). The analysis of plastic particles in technical and environmental systems as well as biological matrices is still in early stages of technical readiness and no standardized methods are available to date. The production of CRMs for plastic particles is hampered by a lack of metrologically validated procedures. However, as the analytical science of MNP advances and MNP interlaboratory studies are showing that more and more laboratories are becoming proficient in analysing MNP, CRMs should be added to the QA/QC toolbox. This study aims at identifying the scope of current CRM needs, the technical feasibility of meeting these needs, and suggests a practical way forward for the development of CRMs for plastic particles.
Universality and beyond in optical microcavity billiards with source-induced dynamics
Creators: name: Seemann, Lukas
name: Hentschel, Martina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical microcavity billiards are a paradigm of a mesoscopic model system for quantum chaos. We demonstrate the action and origin of ray-wave correspondence in real and phase space using far field emission characteristics and Husimi functions. Whereas universality induced by the invariant-measure dominated far field emission is known to be a feature shaping the properties of many lasing optical microcavities, the situation changes in the presence of sources that we discuss here. We investigate the source-induced dynamics and the resulting limits of universality while we find ray-picture results to remain a useful tool in order to understand the wave behaviour of optical microcavities with sources. We demonstrate the source-induced dynamics in phase space from the source ignition until a stationary regime is reached comparing results from ray, ray-with-phase, and wave simulations and explore ray-wave correpondence.
description: 14 pages, 7 figures, submitted to Entropy
Collection of Reviewed Resources and Tools for Rare Disease Variant Interpretation
Creators: name: RD Service Collection 1 -  Assessing Molecular Pathogenicity for Rare Disease (AMP4RD)
Publisher: name: Zenodo
Year: 2024

description: Classification of the Rare Disease Resources and ToolsThe Rare Disease resources and tools for annotating pathogenic variants, primarily sourced from the bio.tools registry, have been categorized into four classes:

Databases of Ontologies, Gene/Protein Networks, and Variants.

Tools for Variant Calling and Annotation.

Resources for Gene Prioritization.

Resources and Tools for Variant Interpretation.

The first class is further subdivided into three groups: Disease and Phenotype Classification Databases and Ontologies, Gene and Protein Network Databases, and Databases of Variants. Within the second class, there are distinctions between Automatic Variant Calling Tools and Pipelines, as well as Variant Annotation Tools. The resources and tools associated with variant interpretation are organized into subgroups, encompassing Pathogenicity Predictions, Protein Stability Changes, and Genotype/Phenotype Association Methods.

 

Criteria for Rare Disease Tools EvaluationThe gathered resources and tools underwent a comprehensive evaluation based on a five-star criteria framework. For the tools, our assessment considered the following key aspects:

Citations: Determining whether the resource or tool had been cited more than 50 times.

Download: Examining the availability of a downloadable version that can be installed locally.

Web Server: Assessing whether the service is accessible online.

Update: Verifying if the resource or tool had undergone updates in 2020 or later.

Maturity: based on the presence of the maturity tag on the bio.tools registry.

In the case of databases, we modified the criteria slightly: Citations (point 1) was replaced with the potential to use an API for submitting queries, and Web Server (point 3) was substituted with Access, evaluating the possibility of unrestricted access.

Based on this evaluation criteria, the most reliable and user-friendly resources and tools will be distinguished with a five-star rating.
Modulation of calmodulin lobes by different targets: an allosteric model with hemiconcerted conformational transitions
Creators: name: Lai, Massimo
name: Brun, Denis
name: Edelstein, Stuart J
name: Novère, Nicolas Le
Publisher: name: arXiv
Year: 2014
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Calmodulin, the ubiquitous calcium-activated second messenger in eukaryotes, is an extremely versatile molecule involved in many biological processes: muscular contraction, synaptic plasticity, circadian rhythm, and cell cycle, among others. The protein is structurally organised into two globular lobes, joined by a flexible linker. Calcium modulates calmodulin activity by favoring a conformational transition of each lobe from a closed conformation to an open conformation. Most targets have a strong preference for one conformation over the other, and depending on the free calcium concentration in a cell, particular sets of targets will preferentially interact with calmodulin. In turn, targets can increase or decrease the calcium affinity of the calmodulin molecules to which they bind. Interestingly, experiments with the tryptic fragments showed that most targets have a much lower affinity for the N-lobe than for the C-lobe. Hence, the latter predominates in the formation of most calmodulin-target complexes. We showed that a relatively simple allosteric mechanism, based the classic MWC model, can capture the observed modulation of both the isolated C-lobe, and intact calmodulin, by individual targets. Moreover, our model can be naturally extended to study how the calcium affinity of a single pool of calmodulin is modulated by a mixture of competing targets in vivo.
title: Αξιολόγηση της αντιλαμβανόμενης και της παρεχόμενης ποιότητας υπηρεσιών των πελατών στα δημοτικά γυμανστήρια του δήμου Αθηναίων
titleType: AlternativeTitle
Creators: name: Κουμανάκος, Αλέξανδρος
Publisher: name: University of Thessaly
Year: 2010
Subjects: subject: ΧΩΡΟΙ ΑΘΛΗΣΗΣ -- ΑΞΙΟΛΟΓΗΣΗ
subject: ΑΘΛΗΤΙΣΜΟΣ -- ΔΙΟΙΚΗΣΗ ΚΑΙ ΟΡΓΑΝΩΣΗ

description: Με την παρούσα εργασία έγινε προσπάθεια να μελετηθεί ο χώρος των δημοτικών γυμναστήριων του Δήμου Αθηναίων διερευνώντας ζητήματα ποιότητας τα οποία θα μπορούσαν να εξυπηρετήσουν στη βελτίωση των παρεχόμενων υπηρεσιών από τα δημοτικά γυμναστήρια, να βοηθήσουν στο σχεδίασμά και στην υλοποίηση κατάλληλων στρατηγικών μάρκετινγκ, να προτείνουν ένα νέο μεθοδολογικό εργαλείο για τη μελέτη της ποιότητας - ικανοποίησης σε αθλητικούς οργανισμούς, συμβάλλοντας κατ’ αυτόν τον τρόπο στη διεθνή βιβλιογραφία του αθλητικού μάρκετινγκ. Ο σκοπός της παρούσας μελέτης ήταν να καταγράψει την αναλαμβανόμενη και την προσδοκώμενη ποιότητα υπηρεσιών από την πλευρά των πελατών των δημοτικών γυμναστηρίων και να διερευνήσει της δομική εγκυρότητα και αξιοπιστία του ερωτηματολογίου της ποιότητας υπηρεσιών. Το δείγμα της έρευνας ήταν τριακόσια είκοσι (320) άτομα και συλλέχτηκε από τα έξι εκ των δεκατεσσάρων γυμναστήριων που υπάρχουν στον Δήμο Αθηναίων. Στην έρευνα έλαβαν μέρος γυναίκες και άντρες ασκούμενοι άνω των 18 ετών που συμμετείχαν σε συγκεκριμένα προγράμματα εκγύμνασης ή χρησιμοποιούσαν τα ελεύθερα βάρη. Για τη μελέτη της προσδοκώμενης και της αντιλαμβανόμενης ποιότητας υπηρεσιών χρησιμοποιήθηκε το ερωτηματολόγιο των Kim και Kim (1995), το οποίο αποτελείται από τρεις ομάδες ερωτήσεων. Οι πρώτες δυο ομάδες ερωτήσεων περιλαμβάνουν από 43 ερωτήσεις η κάθε μια, 5βάθμιας κλίμακας. Η τρίτη ομάδα αποτελούνταν από ερωτήσεις δημογραφικών χαρακτηριστικών. Το συγκεκριμένο ερωτηματολόγιο μεταφράστηκε στην Ελληνική γλώσσα από τους Afithinos, Theodorakis και Nassis (2005). Τα ερωτηματολόγια διανεμήθηκαν στους αθλούμενους κατά την είσοδο τους στο γυμναστήριο, τα συμπλήρωναν είτε πριν ασκηθούν, είτε μετά το πέρας της άσκησης τους και τα παρέδιδαν κατά την έξοδό τους, στη γραμματεία του γυμναστηρίου. Έγινε ανάλυση συχνοτήτων και περιγραφική ανάλυση για παράγοντες και δημογραφικά χαρακτηρισπκά. Η αξιοπιστία των ερωτηματολογίων αξιολογήθηκε μέσω του συντελεστή Cronbach. Τα αποτελέσματα βοηθούν στη συνειδητοποίηση της πραγματικής ποιότητας υπηρεσιών που προσφέρουν τα Δημοτικά γυμναστήρια, ώστε η εκάστοτε διοίκηση να σχεδιάσει καλύτερα και να βελτιώσει τις υπηρεσίες της.
A Low Cost Amplifier And Acquisition System For Cortical-Electroncephalography In Non-Human Applications
Creators: name: Viggiano, Andrea
name: Coppola, Giangennaro
Publisher: name: Universita' degli Studi di Salerno
Year: 2014
Subjects: Amplifier
Electrophysiology
Data acquisition
cEEG
ECG
Field potentials

description: A simple circuit is described to make an AC-amplifier and an analog-to-digital converter in a single, compact solution, for use in basic research, but not on humans. The circuit sends data to and is powered from a common USB port of modern computers; using proper firmware and driver the communication with the device is an emulated RS232 serial port.
Overcoming power broadening of the quantum dot emission in a pure wurtzite nanowire
Creators: name: Reimer, Michael E.
name: Bulgarini, Gabriele
name: Heeres, Reinier W.
name: Witek, Barbara J.
name: Versteegh, Marijn A. M.
name: Dalacu, Dan
name: Lapointe, Jean
name: Poole, Philip J.
name: Zwiller, Val
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: One of the key challenges in developing quantum networks is to generate single photons with high brightness, purity, and long temporal coherence. Semiconductor quantum dots potentially satisfy these requirements; however, due to imperfections in the surrounding material, the coherence generally degrades with increasing excitation power yielding a broader emission spectrum. Here we overcome this power broadening regime and demonstrate the longest coherence at exciton saturation where the detection count rates are highest. We detect single-photon count rates of 460,000 counts per second under pulsed laser excitation while maintaining a single-photon purity of greater than 99%. Importantly, the enhanced coherence is attained with quantum dots in ultraclean wurtzite InP nanowires, where the surrounding charge traps are filled by exciting above the wurtzite InP nanowire bandgap. By raising the excitation intensity, the number of possible charge configurations in the quantum dot environment is reduced, resulting in a narrower emission spectrum. Via Monte Carlo simulations we explain the observed narrowing of the emission spectrum with increasing power. Cooling down the sample to 300 mK, we further enhance the single-photon coherence two-fold as compared to operation at 4.5 K, resulting in a homogeneous coherence time, T2, of 1.2 ns.
description: 13 pages, including supplementary information
Proximity effects at the interface of a superconductor and a topological insulator in NbN - Bi_2Se_3 thin film bilayers
Creators: name: Koren, Gad
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In a search for a simple proximity system of a topological insulator and a superconductor for studying the role of surface versus bulk effects by gating, we report here on a first step toward this goal, namely the choice of such a system and its characterization. We chose to work with thin film bilayers of grainy 5 nm thick NbN films as the superconductor, overlayed with 20 nm thick topological layer of $\rm Bi_2Se_3$ and compare the transport results to those obtained on a 5 nm thick reference NbN film on the same wafer. Bilayers with ex-situ and in-situ prepared $\rm NbN-Bi_2Se_3$ interfaces were studied and two kinds of proximity effects were found. At high temperatures just below the superconducting transition, all bilayers showed a conventional proximity effect where the topological $\rm Bi_2Se_3$ suppresses the onset or mid-transition $T_c$ of the superconducting NbN films by about 1 K. At low temperatures, a cross-over of the resistance versus temperature curves of the bilayer and reference NbN film occurs, where the bilayers show enhancement of $T_c(R=0)$, $I_c$ (the supercurrent) and the Andreev conductance, as compared to the bare NbN films. This indicates that superconductivity is induced in the $\rm Bi_2Se_3$ layer at the interface region in between the NbN grains. Thus an inverse proximity effect in the topological material is demonstrated.
description: 8 pages, 11 figures
title: Η επίδραση της αυτο-ομιλίας στην αυτο-αποτελεσματικότητα και στην απόδοση σε νεαρούς αθλητές αντισφαίρισης
titleType: AlternativeTitle
Creators: name: Γκόλτσιος, Χρήστος
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΑΝΤΙΣΦΑΙΡΙΣΗ -- ΨΥΧΟΛΟΓΙΑ
subject: ΑΝΤΙΣΦΑΙΡΙΣΗ -- ΠΡΟΠΟΝΗΣΗ

description: Σκοπός της παρούσας έρευνας ήταν να διερευνηθεί η επίδραση ενός παρεμβατικού προγράμματος αυτο-ομιλίας στην αυτο-αποτελεσματικότητα και στην απόδοση αθλητών και αθλητριών αντισφαίρισης. Στην έρευνα συμμετείχαν 46 αθλητές και αθλήτριες αντισφαίρισης (22 αγόρια και 24 κορίτσια), με μέσο όρο ηλικίας 13.26 (± 1.96) έτη. Για την αξιολόγηση της δεξιότητας χρησιμοποιήθηκε το Broer-Miller Forehand Drive test, ενώ για την μέτρηση της αυτο-αποτελεσματικότητας χρησιμοποιήθηκε μια σχετική κλίμακα. Μετά από την αρχική μέτρηση οι συμμετέχοντες χωρίστηκαν τυχαία σε δύο ομάδες (παρέμβασης και ομάδα ελέγχου). Οι δύο ομάδες ακολούθησαν το ίδιο πρωτόκολλο προπόνησης για τις επόμενες τρεις προπονήσεις, ωστόσο η ομάδα παρέμβασης προπονήθηκε με τη χρήση της αυτο-ομιλίας. Τέλος, μετά το πέρας των τριών προπονήσεων πραγματοποιήθηκε η τελική μέτρηση. Επαναλαμβανόμενες μετρήσεις ανάλυσης διακύμανσης έδειξαν ότι η ομάδα παρέμβασης παρουσίασε μεγαλύτερη βελτίωση στην αυτο-αποτελεσματικότητα, ρ < .01, η2 = .57, από την ομάδα ελέγχου,/» < .05, η2 = .29. Ακόμα βρέθηκε ότι η ομάδα παρέμβασης βελτίωσε σημαντικά την απόδοση της,/» < .01, η = .57, ενώ δεν παρατηρήθηκαν διαφορές στην απόδοση της ομάδας ελέγχου, ρ - .35, η = .02. Τα αποτελέσματα υποστηρίζουν ότι η αύξηση της αυτο- αποτελεσματικότητας είναι ένας από τους μηχανισμούς μέσω των οποίων η αυτοομιλία επιδρά στην αύξηση της απόδοσης στα σπορ.
A Model Theory for the Potential Infinite
Creators: name: Eberl, Matthias
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C68 (Primary), 03C30, 03C13

description: We present the model theoretic concepts that allow mathematics to be developed with the notion of the potential infinite instead of the actual infinite. The potential infinite is understood as a dynamic notion, being an indefinitely extensible finite. The main adoption is the interpretation of the universal quantifier, which has an implicit reflection principle. Each universal quantification refers to an indefinitely large, but finite set. The quantified sets may increase, so after a reference by quantification, a further reference typically uses a larger, still finite set. We present the concepts for classical first-order logic and show that these dynamic models are sound and complete with respect to the usual inference rules. Moreover, a finite set of formulas requires a finite part of the increasing model for a correct interpretation.
description: 23 pages
Stay in touch
Creators: name: Stoner, Rebecca
Publisher: name: No Publisher Supplied
Year: 2024

description: This thesis explores safety, precarity and danger, as well as the structures that promise and forbid meaningful connections across the boundaries of race, gender, class, and species. Part I takes up these ideas in the context of sexual violence and heterosexual relationships; Part II in the context of environmental crisis; and Part III in the context of gentrifying urban space.
Utilization of Brewer’s Spent Grains and Agricultural Residues in Pig Feed Formation
Creators: name: Stahn, Tanja
name: Storandt, Regina
name: Grebenteuch, Sandra
name: Rohn, Sascha
name: May, Detlef
name: Dolsdorf, Claudia
name: Pleissner, Daniel
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche
subject: extrusion
subject: feed
subject: animal husbandry
subject: side-stream valorization

description: In this study, brewer’s spent grains (BSG)-raw matrix was technologically and functionally improved by adding natural active ingredient carriers (crushed wheat, rapeseed, and pumpkin seed press cake) and using planetary roller extrusion and used as feed additive for pigs. Feeding trials were run for 189 days using 60 pigs with an age of 28 days. Pigs were grouped in a control group (fed with organic basic feed) and two experimental groups (fed with BSG 1 or BSG 2 in addition to organic basic feed). The 20 animals per group gained similar weight in the control group (306 g day−1 and 725 g day−1) and in the group fed with BSG 1 (282 g day−1 and 627 g day−1) or BSG 2 (250 g day−1 598 g day−1) in addition during rearing and fattening phases, respectively. Carcass evaluation revealed that meat quality did not differ between control and experimental groups. The BSG-based feed formulations tested seem to not result in negative effects on weight gain nor on meat quality. Animals were generally of good health and marketable quality, and thus the outcomes of this study are expected to contribute to an improved utilization strategy of brewer’s spent grains from breweries.
Phase-field modeling of fluid-driven dynamic cracking in porous media
Creators: name: Zhou, Shuwei
name: Zhuang, Xiaoying
name: Rabczuk, Timon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: A phase field model for fluid-driven dynamic crack propagation in poroelastic media is proposed. Therefore, classical Biot poroelasticity theory is applied in the porous medium while arbitrary crack growth is naturally captured by the phase field model. We also account for the transition of the fluid property from the intact medium to the fully broken one by employing indicator functions. We employ a staggered scheme and implement our approach into the software package COMSOL Multiphysics. Our approach is first verified through three classical benchmark problems which are compared to analytical solutions for dynamic consolidation and pressure distribution in a single crack and in a specimen with two sets of joints. Subsequently, we present several 2D and 3D examples of dynamic crack branching and their interaction with pre-existing natural fractures. All presented examples demonstrate the capability of the proposed approach of handling dynamic crack propagation, branching and coalescence of fluid-driven fracture.
Pemetaan Penelitian Rasio Operating Profit Margin (OPM) pada Perbankan Syariah dan Konvensional: Studi Bibliometrik VOSviewer dan Literature Review
Creators: name: Budianto, Eka Wahyu Hestya
name: Dewi, Nindi Dwi Tetria
Publisher: name: Zenodo
Year: 2023
Subjects: Operating Profit Margin (OPM)
Bibliometrics
VOSviewer
Literature Review
Islamic and Conventional Banking

description: ABSTRAK Penelitian ini bertujuan untuk mengetahui pemetaan penelitian seputar rasio Operating Profit Margin (OPM) pada Perbankan Syariah dan Konvensional dengan pendekatan mix-method, yaitu studi bibliometrik VOSviewer dan literature review. Teknik analisis data meliputi: (1) memetakan jumlah sebaran publikasi jurnal seputar rasio OPM; (2) memetakan hasil visualisasi bibliometrik VOSviewer seputar rasio OPM berdasarkan jumlah kluster dan itemnya; dan (3) memetakan topik penelitian seputar rasio OPM menggunakan studi literature review. Hasil penelitian menunjukkan bahwa: (1) berdasarkan pemetaan jumlah sebaran publikasi jurnal, terdapat 23 publikasi jurnal seputar rasio OPM; (2) berdasarkan pemetaan studi bibliometrik VOSviewer, hasil visualisasi jaringan seputar rasio OPM terbagi menjadi 3 kluster dan 75 item topik; (3) berdasarkan pemetaan studi literature review, terdapat 15 topik seputar rasio OPM. Implikasi dan kontribusi penelitian ini adalah memetakan topik-topik penelitian seputar rasio OPM pada Perbankan Syariah dan Konvensional yang sering ataupun jarang diteliti oleh peneliti, sehingga dapat menjadi rujukan bagi peneliti setelahnya. ABSTRACT This study aims to determine the research mapping regarding the Operating Profit Margin (OPM) ratio in Islamic and Conventional Banking using a mix-method approach, namely the VOSviewer bibliometric study and literature review. Data analysis techniques include: (1) mapping the distribution of journal publications around the OPM ratio; (2) mapping the results of the VOSviewer bibliometric visualization around the OPM ratio based on the number of clusters and their items; and (3) mapping research topics around the OPM ratio using
Optimal quantum control of Bose-Einstein condensates in magnetic microtraps: Comparison of GRAPE and Krotov optimization schemes
Creators: name: Jäger, Georg
name: Reich, Daniel
name: Goerz, Michael H.
name: Koch, Christiane P.
name: Hohenester, Ulrich
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study optimal quantum control of the dynamics of trapped Bose-Einstein condensates: The targets are to split a condensate, residing initially in a single well, into a double well, without inducing excitation; and to excite a condensate from the ground to the first excited state of a single well. The condensate is described in the mean-field approximation of the Gross-Pitaevskii equation. We compare two optimization approaches in terms of their performance and ease of use, namely gradient ascent pulse engineering (GRAPE) and Krotov's method. Both approaches are derived from the variational principle but differ in the way the control is updated, additional costs are accounted for, and second order derivative information can be included. We find that GRAPE produces smoother control fields and works in a black-box manner, whereas Krotov with a suitably chosen step size parameter converges faster but can produce sharp features in the control fields.
description: 10 pages, 9 figures; to appear in Phys. Rev. A
Investigation of Davis Dam Drive Cycle Application for Performance Assessment of Electrified and Conventional Long-Haul Trucks
Creators: Moghadasi, Sina
Long, Yanxiang
Munshi, Sandeep
McTaggart-Cowan, Gordon
Shahbakhti, Mahdi
Publisher: name: University of Alberta Library
Year: 2022

Conference Abstract. Part of the Proceedings of the Canadian Society for Mechanical Engineering International Congress 2022.
Contactless Measurement of AC Conductance in Quantum Hall Structures
Creators: name: Drichko, I. L.
name: Diakonov, A. M.
name: Malysh, V. A.
name: Smirnov, I. Yu.
name: Galperin, Y. M.
name: Ilyinskaya, N. D.
name: Usikova, A. A.
name: Kummer, M.
name: von Känel, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report a procedure to determine the frequency-dependent conductance of quantum Hall structures in a broad frequency domain. The procedure is based on the combination of two known probeless methods -- acoustic spectroscopy and microwave spectroscopy. By using the acoustic spectroscopy, we study the low-frequency attenuation and phase shift of a surface acoustic wave in a piezoelectric crystal in the vicinity of the electron (hole) layer. The electronic contribution is resolved using its dependence on a transverse magnetic field. At high frequencies, we study the attenuation of an electromagnetic wave in a coplanar waveguide. To quantitatively calibrate these data, we use the fact that in the quantum-Hall-effect regime the conductance at the maxima of its magnetic field dependence is determined by extended states. Therefore, it should be frequency independent in a broad frequency domain. The procedure is verified by studies of a well-characterized $p$-SiGe/Ge/SiGe heterostructure.
description: 7 pages, 8 figures; to be submitted to JAP
Society, innovation and energy policy in Brazil
Creators: name: Raizer Leandro
Publisher: name: Социология науки и технологий
Year: 2017
Subjects: SOCIOLOGY OF SCIENCE
INNOVATION
ENERGY POLICY
BRAZIL
SOCIO-TECHNICAL NETWORK
CLIMATE CHANGE
ALTERNATIVE ENERGY

description: The study presents an overview of the Brazilian energy policy in the period 2005-2015, with emphasis on the analysis of the socio-technical network of the energy system. Brazil is among the countries with the highest energy potential, non-renewable or renewable (with one of the greatest potential for wind and solar resources). The study is based on empirical research involving the use of statistical data, analysis of interviews with scientists, businessmen and politicians, analysis of Laws and official documents of the energy sector. Among the results of the research, we highlight the existence of a system with reduced capacity for innovation and a centralized and bureaucratic regulation, which has been unable to increase the supply of demand, presenting a risk of collapse in the medium and long term. Among the factors that explain this trajectory (considering the last decade), the study highlights the presence of a peculiar socio-technical network (Latour and Knorr-Cetina), in which the political-business arena gains predominance, being determinant for the reduction of the transformative potential arising from the emergence of a new model of energy development and its societal consequences. In this context, paradoxically, new technologies and values (sustainability) coexist with technologies and practices of the nineteenth century, with the conservation of an extreme unequal society, with great risks (Beck and Giddens), both for social development and the preservation of natural resources and the ecosystem.