cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Study of mental health and learning engagement during COVID-19 pandemic based on an electroencephalogram headset
Creators: name: Marin, Iuliana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The COVID pandemic and the measures which were taken had effect over the mental health of persons. The current paper proposes a concept that supports the performance of students by analyzing three ways of distance learning, namely text, text and illustrations, including charts, video. An electroencephalogram headset allows the detection of brainwaves and the developed web application enhances the process of distance learning. The electrodes of the headset are placed at contact with the user head and monitor the activity of the left and right frontal regions, along with the temporal lobe. Mood, focus, stress, relaxation, engagement, excitement and interest are triggered as numerical values by using the headset. The users provide information about their daily activities, including learning and evaluation processes. According to the study, users had the highest long term attention while using text and illustrations, followed by watching videos. This is caused by the fact that the text contained the code for the programs which were presented in the video. Also, the users feel comfortable while using the application and they started to pay more attention to the connection between stress, health, education and well being. The results triggered by the headset had higher values while students studied for the first time using videos. When they wanted to remember the information, the text and illustrations way of learning was the best option. Based on the study outcomes, the instructional design can be enhanced. Moreover, the results improved as the students became more equilibrated and confident in themselves. Teachers, professors and parents are able to collaborate and enhance training. While studying online under lockdown, students have found the proposed solution to be good because their inner state influences their productivity while solving problems.
E-wom and territorial analyses: the use of opinion mining in tourism
Creators: name: Misuraca, Michelangelo
name: Spano, Maria
name: Celardo, Luigo
Publisher: name: Zenodo
Year: 2024

description: In the digital age, social media and electronic word of mouth (eWOM) have fundamentallytransformed several industries, including tourism. This paper explores how opinion mining (also known as sentiment analysis) can be a strategic tool for tourism stakeholders to extract and analyse data from social media reviews and posts. The aim is to provide actionable insights to enhance customer satisfaction and destination management by assessing the sentiment expressed in onlinecontent. From a methodological viewpoint, the implemented approach integrates qualitative and quantitative data with textual data to delve into opinions embedded in eWOM. The analyses help identify patterns and trends in tourists’ feedback, offering a valuable framework for understanding theirbehaviour and leveraging this information for the stakeholders’ specific purposes. A case study on Naples (Italy) highlights the potential of sentiment analysis in tourism, suggesting future research directions. Practical applications range from improving customer satisfaction and destination reputation to guiding marketing strategies and supporting sustainable tourism development.
Head-to-nerve analysis of electromechanical impairments of diffuse axonal injury
Creators: name: Cinelli, Ilaria
name: Destrade, Michel
name: McHugh, Peter
name: Trotta, Antonia
name: Gilchrist, Michael
name: Duffy, Maeve
Publisher: name: arXiv
Year: 2020
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The aim was to investigate mechanical and functional failure of diffuse axonal injury (DAI) in nerve bundles following frontal head impacts, by finite element simulations. Anatomical changes following traumatic brain injury are simulated at the macroscale by using a 3D head model. Frontal head impacts at speeds of 2.5-7.5 m/s induce mild-to-moderate DAI in the white matter of the brain. Investigation of the changes in induced electromechanical responses at the cellular level is carried out in two scaled nerve bundle models, one with myelinated nerve fibres, the other with unmyelinated nerve fibres. DAI occurrence is simulated by using a real-time fully coupled electromechanical framework, which combines a modulated threshold for spiking activation and independent alteration of the electrical properties for each three-layer fibre in the nerve bundle models. The magnitudes of simulated strains in the white matter of the brain model are used to determine the displacement boundary conditions in elongation simulations using the 3D nerve bundle models. At high impact speed, mechanical failure occurs at lower strain values in large unmyelinated bundles than in myelinated bundles or small unmyelinated bundles; signal propagation continues in large myelinated bundles during and after loading, although there is a large shift in baseline voltage during loading; a linear relationship is observed between the generated plastic strain in the nerve bundle models and the impact speed and nominal strains of the head model. The myelin layer protects the fibre from mechanical damage, preserving its functionalities.
Coexistence of BCS and BEC-like pair structures in halo nuclei
Creators: name: Hagino, K.
name: Sagawa, H.
name: Carbonell, J.
name: Schuck, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We investigate the spatial structure of the two-neutron wave function in the Borromean nucleus $^{11}$Li, using a three-body model of $^9$Li $+n+n$, which includes many-body correlations stemming from the Pauli principle. The behavior of the neutron pair at different densities is simulated by calculating the two-neutron wave function at several distances between the core nucleus $^9$Li and the center of mass of the two neutrons. With this representation, a strong concentration of the neutron pair on the nuclear surface is for the first time quantitatively established for neutron-rich nuclei. That is, the neutron pair wave function in $^{11}$Li has an oscillatory behavior at normal density, while it becomes a well localized single peak in the dilute density region around the nuclear surface. We point out that these features qualitatively correspond to the BCS and BEC-like structures of the pair wave function found in infinite nuclear matter.
description: 4 pages, 3 eps figures. The version to appear in PRL
Η προστασία των δικαιωμάτων του παιδιού σε υποθέσεις διεθνούς απαγωγής από τον ένα γονέα:
Creators: name: Μπίτσιου, Αλίκη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Απαγωγή
Παιδί
Συμφέρον
Abduction
Child
Interest

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη του εάν και κατά πόσο προστατεύονται τα δικαίωματα του παιδιού κατά τις διαδικασίες επιστροφής του στον προηγούμενο τόπο της συνήθους διαμονής του σύμφωνα με τη σύμβαση της Χάγης του 1980 για τα αστικά θέματα της διεθνούς απαγωγής παιδιών και τον κανονισμό 2201/2003 του συμβουλίου για τη διεθνή δικαιοδοσία και την αναγνώριση και εκτέλεση αποφάσεων σε γαμικές διαφορές και διαφορές γονικής μέριμνας. Επίσης, αναλύθηκε ένα βασικό ζήτημα που προκύπτει σε περιπτώσεις διεθνών απαγωγών, δηλαδή με ποιους τρόπους θα οδηγηθεί το Δικαστήριο στην απόφασή του περί επιστροφής ή μη σε υποθέσεις στις οποίες το ένα μέρος ισχυρίζεται ότι υπάρχει σοβαρός κίνδυνος η επιστροφή του παιδιού στον προηγούμενο τόπο διαμονής του να το εκθέσει σε φυσική ή ψυχική δοκιμασία ή να το περιαγάγει σε μια αφόρητη κατάσταση. Ακόμη, αναφερθήκαμε αναλυτικά στην έννοια του συμφέροντος του παιδιού καθώς και στο σύνολο των αρχών που έχουν καθορίσει με τη νομολογία τους το Δικαστήριο της Ευρωπαικής Ένωσης και το Ευρωπαικό Δικαστήριο Ανθρωπίνων Δικαιωμάτων σχετικά με τις υποθέσεις διεθνούς απαγωγής παιδιών.
description: The aim of the present thesis was to study whether and to what extent children’s rights are protected during the procedure of returning to the former habitual residence under the Hague convention of 1980 on the civil aspects of international child abduction and the council regulation 2201/2003 concerning jurisdiction and the recognition and enforcement of judgments in matrimonial matters and the matters of parental responsibility. Also, we examined a key issue that arises in cases of international abductions, in particularly the way that the court is going to order or not the return of the child, if the person opposes its return presenting the argument, that there is a grave risk connected to the child’s return, which would expose the child to physical or psychological harm or otherwise place the child in an intolerable situation. Furthermore, we analyzed the definition of the interest of the child as well as the regimes adjudicated by the European Court of Justice and the European Court of Human Rights in cases of international child abduction.
High-performance fluoroelastomer-graphene nanocomposites for advanced sealing applications
Creators: name: Liu, Mufeng
name: Cataldi, Pietro
name: Young, Robert J.
name: Papageorgiou, Dimitrios G.
name: Kinloch, Ian A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High-performance sealing materials that can guard key components against high pressure gases and liquid chemicals while withstanding mechanical deformation are of utmost importance in a number of industries. In this present work, graphene nanoplatelets (GNPs) were introduced into a fluoroelastomer (FKM) matrix to improve its mechanical and barrier properties and test its suitability for sealing applications. Nanocomposites filled with different loadings of GNPs were prepared and compared with their counterparts loaded with carbon black (CB). GNPs were dispersed homogeneously with a high degree of in-plane alignment. The tensile and barrier properties of the FKM were improved significantly by the addition of GNPs. Micromechanical modelling based on the shear-lag/rule-of-mixtures theory was used to analyse the reinforcing efficiency of the GNPs. Upon the addition of the GNPs, the elastomer was able to swell anisotropically in liquids, a fact that can be used to tune the swelling properties for sealing applications. In terms of gas permeability, a modification of the well-established Nielsen's theory was introduced to analyse the CO2 permeability for the bulk composite samples. The significantly improved mechanical, thermal and barrier properties at relatively low filler loadings, reveal that the FKM/GNP nanocomposites produced are very promising for use in advanced sealing applications.
Orthomcl-Companion: a user friendly tool to analyse protein families
Creators: name: Carrere, Sebastien
name: Cottret, Ludovic
name: Rancurel, Corinne
name: Briand, Martial
Publisher: name: F1000Research
Year: 2015

description: Nowadays, comparative genomics is a classical tool for biologists to address various scientific questions such as pathogeny determinism, bacteria host specificity, duplication and gene family expansion in a species.

The large number of available finished or draft genome sequences associated with the full automation of structural annotation pipelines leads to an era of high throughput comparative genomics. Tools like OrthoMCL provide an easy way to to compare tens of species at a time and build homologous gene families.

However, output results, classically a matrix with groups as lines and genes as columns, remains too raw to be interpreted by an end user without programming skills.

In order to help users in the post process of these data, we developed a web user interface that automatically extract frequently asked datasets such as core and pan proteomes, specific proteins, abundance and presence/absence matrix (aka. phylogenetic profiles). Providing optional InterPro annotation will also leads to build tables and charts representing terms (eg : PFAM, GO) count in each previously described datasets.

Our tool uses standard formats as input and outputs to ease post-process analyses.
Experimental demonstration of particle acceleration with normal conducting accelerating structure at cryogenic temperature
Creators: name: Nasr, Mamdouh
name: Nanni, Emilio
name: Breidenbach, Martin
name: Weathersby, Stephen
name: Oriunno, Marco
name: Tantawi, Sami
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Reducing the operating temperature of normal conducting particle accelerators substantially increases their efficiency. Low-temperature operation increases the yield strength of the accelerator material and reduces surface resistance, hence a great reduction in cyclic fatigue could be achieved resulting in a large reduction in breakdown rates compared to room-temperature operation. Furthermore, temperature reduction increases the intrinsic quality factor of the accelerating cavities, and consequently, the shunt impedance leading to increased system efficiency and beam loading capabilities. In this paper, we present an experimental demonstration of the high-gradient operation of an X-band, 11.424 GHz, 20-cells linear accelerator (linac) operating at a liquid nitrogen temperature of 77 K. The tested linac was previously processed and tested at room temperature. We verified the enhanced accelerating parameters of the tested accelerator at cryogenic temperature using different measurements including electron beam acceleration up to a gradient of 150 MV/m, corresponding to a peak surface electric field of 375 MV/m. We also measured the breakdown rates in the tested structure showing a reduction of two orders of magnitude, x100, compared to their values at room temperature for the same accelerating gradient.
Phase Diagram of the Holstein-Hubbard Two-Leg Ladder
Creators: name: Tam, Ka-Ming
name: Tsai, S. -W.
name: Campbell, D. K.
name: Neto, A. H. Castro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using a functional renormalization group method, we obtain the phase diagram of the two-leg ladder system within the Holstein-Hubbard model, which includes both electron-electron and electron-phonon interactions. Our renormalization group technique allows us to analyze the problem for both weak and strong electron-phonon coupling. We show that, in contrast results from conventional weak coupling studies, electron-phonon interactions can dominate electron-electron interactions because of retardation effects.
description: 4 pages
Εθνοβοτανική έρευνα στο Νομό Κιλκίς
Creators: name: Χαραλαμπίδου, Χαραλαμπία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Εθνοβοτανική
Κιλκίς
χρήσεις φυτών
Ethnobotany
Kilkis
plant uses

description: Σκοπός της παρούσας εργασίας είναι η συμβολή στη διατήρηση της πολιτιστικής κληρονομιάς στο Νομό Κιλκίς. Καταγράφεται η εθνοβοτανική γνώση, που σχετίζεται με τις παραδοσιακές χρήσεις των αυτοφυών, μη-καλλιεργούμενων φυτών στα όρια του Νομού Κιλκίς, με τη διενέργεια συνεντεύξεων σε 32 άτομα, από 9 διαφορετικές περιοχές του νομού, κατά τις οποίες συμπληρώθηκε σχετικό έντυπο. Τα φυτικά είδη που αναφέρθηκαν στις συνεντεύξεις, ταυτοποιήθηκαν και αξιολογήθηκαν με τη βοήθεια εθνοβοτανικών δεικτών. Από τις δειγματοληψίες συγκεντρώθηκαν συνολικά 187 φυτικά δείγματα, τα οποία αντιστοιχούν σε 59 φυτικά είδη. Τα 57 από αυτά ταυτοποιήθηκαν και ανήκουν σε 35 οικογένειες και 55 γένη, με τις οικογένειες των Asteraceae, Rosaceae και Lamiaceae να συγκεντρώνουν το μεγαλύτερο ποσοστό (34,49%). Οι υψηλότερες τιμές του δείκτη χρήσεων (UT), του δείκτη αξίας χρήσης (UV) και του δείκτη σχετικής σημαντικότητας (RI) σημειώθηκαν για το είδος Mentha spicata subsp. spicata με τιμές 5, 0,15 και 2,0 αντίστοιχα. Στο δείκτη σημαντικότητας (IV) η υψηλότερη τιμή 1 σημειώθηκε στα Matricaria chamomilla και Origanum vulgare. Τέλος, η υψηλότερη τιμή του συντελεστή συμφωνίας ερωτηθέντων (Fic) 1, εμφανίστηκε στην ομάδα των οφθαλμολογικών παθήσεων. Συμπερασματικά, διαπιστώθηκε ότι η χρήση των αυτοφυών φυτικών ειδών, που πηγάζει κυρίως από την παράδοση, είναι ακόμη ζωντανή στην περιοχή αυτή, αν και η μετάδοσή της από γενιά σε γενιά τείνει προς εξαφάνιση
description: The purpose of this paper is to contribute to the conservation of cultural heritage in the prefecture of Kilkis. The ethnobotanical knowledge, that is associated with the traditional uses of wild, non-cultivated plants in the prefecture of Kilkis is recorded through interviews with thirty-two (32) participants, from nine (9) different areas of the prefecture, during which a relevant form was filled. The plant species mentioned, were identified and evaluated with the use of ethnobotanical indices. One hundred and eighty-seven (187) plant samples from fifty-nine (59) plant species were collected and fifty-seven (57) of those were identified to belong in thirty-five (35) families and fifty-five (55) genera. The highest percentages (34.49%) belonged to the families of Asteraceae, Rosaceae and Lamiaceae. The Mentha spicata subsp. spicata showed the highest in uses totalled index (UT), use value index (UV) and relative importance index (RI), with values of 5, 0.15 and 2.0 respectively. For the importance value index (IV) Matricaria chamomilla and Origanum vulgare both recorded the highest number of 1 and finally, the highest value of 1 in the informant consensus factor (Fic), appeared in the group of eye diseases. In conclusion, it was found that the use of native plant species that mainly stems from tradition is still alive in this region, although its transmission from generation to generation declines.
Markovian semigroup from mixing non-invertible dynamical maps
Creators: name: Siudzińska, Katarzyna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We analyze the convex combinations of non-invertible generalized Pauli dynamical maps. By manipulating the mixing parameters, one can produce a channel with shifted singularities, additional singularities, or even no singularities whatsoever. In particular, we show how to use non-invertible dynamical maps to produce the Markovian semigroup. Interestingly, the maps whose mixing results in a semigroup are generated by the time-local generators and time-homogeneous memory kernels that are not regular; i.e., their formulas contain infinities. Finally, we show how the generators and memory kernels change after mixing the corresponding dynamical maps.
The Dwarf Galaxy Population in Nearby Groups. The data
Creators: name: Carrasco, Eleazar R.
name: de Oliveira, Claudia M.
name: Infante, Leopoldo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We used V and I CCD photometry to search for low-surface brightness dwarf galaxies (LSBD) in the central (<0.5 h^-1 Mpc) region of the groups NGC 6868, NGC 5846, HCG 42 and the poor cluster IC 4765. Using the parameters given by the exponential profile fit, we identified 80 LSBD candidates with magnitudes 17 < V < 22 mag and with colors V-I < 1.5 mag at the limiting isophote of 25.8 V mag/arcsec^2. The galaxies have mu0 > 22.5 V mag/arcsec^2, h > 1.5 arcsec, and diameters larger than 1.2 h^-1 kpc. Twenty of the eighty galaxies are extended LSB galaxies that were detected only on smoothed images, after masking all high surface brightness objects. The completeness in the detection is ~80% for galaxies with V<=20 and 22.5
description: 23 pages, 13 figures, 6 inserted tables using emulateapj.cls style; revision of previously submitted AJ paper
Αυστηρή Σχεδίαση Εφαρμογών στο Διαδίκτυο των Αντικειμένων:
Creators: name: Κουρουλέας, Γεώργιος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Διαδίκτυο των αντικειμένων
Ελεγχος μεσω μοντελοποίησης
Internet of things
Model checking
Contiki

description: Το Διαδίκτυο των Αντικειμένων, γνωστό ως Internet Of Things, αναφέρεται στη διασύνδεση αλλά και τις υπηρεσίες των διαφόρων αντικειμένων τα οποία συνδέονται στο Διαδίκτυο με σκοπό να βελτιώσουν την ποιότητα ζωής των ανθρώπων. Για να γίνει αυτό, ο προγραμματιστής θα πρέπει να λάβει υπόψη του πολλούς παράγοντες για την ανάπτυξη των σχετικών εφαρμογών, όπως την τρωτότητα σε θέματα ασφάλειας ή την προσπάθεια κακόβουλων επιθέσεων. Επίσης, πρέπει να λάβει υπόψη του κάποια προβλήματα στον προγραμματισμό για τέτοιες συσκευές όπως η έλλειψη μνήμης, επεξεργαστικής ισχύς ή την αναγκαιότητα περιορισμού της κατανάλωσης ενέργειας και να φροντίσει ώστε όλα αυτά να λυθούν. Στις συνεισφορές της Διπλωματικής Εργασίας εντάσσονται η εγκατάσταση του Contiki , η εκτέλεση διάφορων εφαρμογών και η ανάπτυξη ακόμη μίας ως proof of concept για κάποιες από τις καταστάσεις του μοντέλου. Τέλος, μία πολύ σημαντική συνεισφορά είναι η κατασκευή ενός μοντέλου στη τυπική γλώσσα BIP που αναπαριστά τη χρήση πόρων από το Λειτουργικό Σύστημα Contiki κατά την εκτέλεση εφαρμογών. Το μοντέλο μπορεί να χρησιμοποιηθεί για την ανάλυση σεναρίων εκτέλεσης με προσομοίωση ή με διερεύνηση του χώρου καταστάσεων του συστήματος για τον εντοπισμό προβλημάτων τα οποία μπορούν να οδηγήσουν στη παραβίαση της ασφάλειας των εφαρμογών ή των πόρων του συστήματος.
description: Internet of Things refers to connectivity and to the services of various objects that connect to the Internet in order to enhance the quality of life. Programmer must take into consideration many factors for building such applications, such as safety vulnerabilities or various malevolent attacks. He must take into consideration also various constraints concerning small embedded devices, such as RAM and ROM, processing or power consumption constraints. This thesis aims to research into the installation of Contiki Operating System and to explain how to build various applications on it. It also aims to construct a model with the help of BIP language, which simulates the usage of resources from Contiki OS during the execution of applications. This model can be used for the analysis of the execution paths with simulation or with state space exploration of the system in order to trace problems that may lead to breach of security of applications or various resources of the system.
The University of British Columbia’s Arts One Program as evaluated by its students
Creators: name: Dumaresq, Cheryl E.
Publisher: name: University of British Columbia
Year: 2009

description: Arts One is an interdisciplinary, first year program in the Faculty of Arts at The University of British Columbia which combines English, History, and Philosophy into one course worth 60% of a full-time program. Since its inception in 1967, over 5000 students have participated in Arts One; however, no formal evaluation from the student perspective has been undertaken. The objective of this study was to investigate Arts One's impact on students academically, socially, and with respect to their careers. The study was divided into two parts. First, a mail questionnaire was sent to 500 individuals who participated in Arts One between 1967 and 1988. Of the two hundred respondents, the majority recalled Arts One positively, with 90% indicating that they would recommend the program. A number of questions emerged from the questionnaires which were investigated in the second part of the study, personal interviews with 21 former Arts One participants. Together, the questionnaires and personal interviews revealed that Arts One has been a success from the perspectives of the study participants. Many had chosen Arts One for its small-sized classes, and most identified the seminars and tutorials as the highlights of the program. In particular, many credited Arts One with having taught them how to think, write, and be open to different perspectives. Participants also recalled the benefits of being part of an intense learning community and the friendships formed as a result. Some found the transition into second year difficult, particularly because of the larger, lecture-style classes. However, the strongest theme to emerge was the impact of the Arts One seminar professor on the experience of his/her students. To a large extent, the success of Arts One seems rooted more firmly in the faculty members involved in the program than in the curriculum itself. In most cases, participants spoke highly of their Arts One seminar professors, and many considered them to have been their mentors. However, some individuals felt that their seminar professors were unsuited to teaching in Arts One and negatively affected their experience. The study concludes with five recommendations, as well as some suggestions for further research.
Semiospheric boundary conflicts on the Roma Holocaust
Creators: name: Latvytė, Neringa
Publisher: name: Zenodo
Year: 2023

description: Presentation 'Semiospheric boundary conflicts on the Roma Holocaust' was presented at the International symposium 'Engaging with heritage, memory and identity on social media in Europe’s borderlands' at the Vilnius University Library, 28-29 June 2023. The symposium was organized by the members of 'Connective Research Group' Faculty of Communication, Vilnius University.
Semiospheric boundary conflicts on the Roma Holocaust
Creators: name: Latvytė, Neringa
Publisher: name: Zenodo
Year: 2023

description: Presentation 'Semiospheric boundary conflicts on the Roma Holocaust' was presented at the International symposium 'Engaging with heritage, memory and identity on social media in Europe’s borderlands' at the Vilnius University Library, 28-29 June 2023. The symposium was organized by the members of 'Connective Research Group' Faculty of Communication, Vilnius University. 

This presentation reports on research conducted as part of "Connective digital memory in borderlands: a mixed-methods study of cultural identity, heritage communication and digital curation on social networks". The Connective project is funded by the European Social Fund under grant agreement 09.3.3-LMT-K-712-17-0027 with the Research Council of Lithuania (LMTLT).
The magic square of Lie groups: the $2 \times 2$ case
Creators: name: Dray, Tevian
name: Huerta, John
name: Kincaid, Joshua
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 22E46 (primary) 15A66, 17A35, 17A75 (secondary)

description: A unified treatment of the $2 \times 2$ analog of the Freudenthal-Tits magic square of Lie groups is given, providing an explicit representation in terms of matrix groups over composition algebras.
description: 22 pages, 1 figure. Archive of paper published in 2014
Παραλληλισμός & εξισορρόπηση φόρτου σε ερωτήματα σε περιβάλλοντα νέφους:
Creators: name: Τριγάζης, Σπυρίδων Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: παράλληλα ερωτήματα
εξισορρόπηση φόρτου
αυτόματος έλεγχος
parallel queries
load balance
automatic control

description: Αντικείμενο της παρούσας εργασίας είναι o παραλληλισμός και η εξισορρόπηση φόρτου σε κατανεμημένα συστήματα διαχείρισης δεδομένων σε περιβάλλοντα νέφους. Μελετήθηκε βιβλιογραφία σχετικά με την εξισορρόπηση φόρτου σε κατανεμημένα και παράλληλα συστήματα και υλοποιήθηκαν για να συγκριθούν δύο πολιτικές εξισορρόπησης. Η πρώτη είναι μια ευριστική τεχνική με ικανοποιητικά πρακτικά αποτελέσματα και η δεύτερη βασίζεται σε ένα MPC ελεγκτή για να υπολογίσει τη βέλτιστη κατανομή των δεδομένων στους κόμβους του συστήματος αλλά έχει μελετηθεί θεωρητικά και σε περιβάλλοντα προσομοίωσης. Οι παραπάνω πολιτικές εφαρμόστηκαν σε ένα σύστημα που υλοποιήθηκε για αυτή την εργασία όπου κάθε κόμβος αντιστοιχεί σε ένα νήμα εκτέλεσης.
description: In this dissertation we studied parallelization and load balancing techniques in cloud data management systems. We studied related bibliography and implemented two different load balancing policies. The first one is a heuristic policy with good practical results and the second one is based on a MPC (Model Predictive Control) controller which computes the optimal workload assignment to the system’ s nodes. The MPC technique has been studied theoretically so far. The above policies were tested in shared memory parallel system implemented for this dissertation where each node is represented by an execution thread.
Diffusion and desorption of SiH3 on hydrogenated H:Si(100)-(2x1) from first principles
Creators: name: Ceriotti, Michele
name: Bernasconi, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have studied diffusion pathways of a silyl radical adsorbed on the hydrogenated Si (100)-(2x1) surface by density-functional theory. The process is of interest for the growth of crystalline silicon by plasma-enhanced chemical vapor deposition. Preliminary searches for migration mechanisms have been performed using metadynamics simulations. Local minima and transition states have been further refined by using the nudged-elastic-band method. Barriers for diffusion from plausible adsorption sites as low as 0.2 eV have been found, but trap states have also been spotted, leading to a more stable configuration, with escape barriers of 0.7 eV. Diffusion among weakly bound physisorbed states is also possible with very low activation barriers (<50 meV). However, desorption mechanisms (either as SiH3 or as SiH4) from physisorbed or more strongly bound adsorption configurations turn out to have activation energies similar to diffusion barriers. Kinetic Monte Carlo simulations based on ab initio activation energies show that the silyl radical diffuses at most by a few lattice spacing before desorbing at temperatures in the range 300-1000 K.
Tunable magneto-optical effect, anomalous Hall effect and anomalous Nernst effect in two-dimensional room-temperature ferromagnet $1T$-CrTe$_2$
Creators: name: Yang, Xiuxian
name: Zhou, Xiaodong
name: Feng, Wanxiang
name: Yao, Yugui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Utilizing the first-principles density functional theory calculations together with group theory analyses, we systematically investigate the spin order-dependent magneto-optical effect (MOE), anomalous Hall effect (AHE), and anomalous Nernst effect (ANE) in a recently discovered two-dimensional room-temperature ferromagnet $1T$-CrTe$_2$. We find that the spin prefers an in-plane direction by the magnetocrystalline anisotropy energy calculations. The MOE, AHE, and ANE display a period of $2π/3$ when the spin rotates within the atomic plane, and they are forbidden if there exists a mirror plane perpendicular to the spin direction. By reorienting the spin from in-plane to out-of-plane direction, the MOE, AHE, and ANE are enhanced by around one order of magnitude. Moreover, we establish the layer-dependent magnetic properties for multilayer $1T$-CrTe$_2$ and predict antiferromagnetism and ferromagnetism for bilayer and trilayer $1T$-CrTe$_2$, respectively. The MOE, AHE, and ANE are prohibited in antiferromagnetic bilayer $1T$-CrTe$_2$ due to the existence of the spacetime inversion symmetry, whereas all of them are activated in ferromagnetic trilayer $1T$-CrTe$_2$ and the MOE is significantly enhanced compared to monolayer $1T$-CrTe$_2$. Our results show that the magneto-optical and anomalous transports proprieties of $1T$-CrTe$_2$ can be effectively modulated by altering spin direction and layer number.
description: 13 pages, 9 figures, 2 tables
Quality and quantity matter in disease model curation
Creators: name: Wang, Shur-Jen Susan
name: Smith, Jennifer R
name: Laulederkind, Stanley JF
name: Hayman, G Thomas
name: Tutaj, Monika
name: Kaldunsk, Mary L
name: Vedi, Mahima
name: Demos, Wendy M
name: Tutaj, Marek A
name: Thota, Jyothi
name: Lamers, Logan
name: Gibson, Adam C
name: Kundurthi, Akhilanand
name: Gollapally, Varun Reddy
name: Brodie, Kent C
name: Zacher, Stacy
name: De Pons, Jeffrey L
name: Dwinell, Melinda R
name: Kwitek, Anne E
Publisher: name: F1000 Research Limited
Year: 2025

description: Rats have been used in disease research for over 100 years. These disease models arise from naturally occurring mutations, selective breeding and, more recently, genome manipulation. To better curate rat strains and keep up with the variety of strains generated by genome editing, the RGD curation team has revisited strain curation to specifically annotate disease model strains from published literature. The MODEL qualifier is used in conjunction with the disease ontology term to highlight the annotated strain as a disease model.  Information such as how the model is produced or what aspect of the disease this model is used for are also curated. The disease model strains are characterized by several disease-associated phenotypes and/or have been reported in several publications where the same disease was studied. The quantitative phenotypes of these model strains can be accessed from the PhenoMiner links provided in the strain report page and their phenotype relative to other rat strains can be found through the Expected Ranges tool.  The damaging variants are available in the strain report page if the strain was sequenced, and the full genome variation analysis can be found in the Variant Visualizer tool. Linking disease/phenotype annotation and genomic variations of the disease model will provide a useful approach to understanding the complexities of physiological genomics.
Wormholes, a fluctuating cosmological constant and the Coleman mechanism
Creators: name: Ambjorn, Jan
name: Sato, Yuki
name: Watabiki, Yoshiyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that in a two-dimensional model of quantum gravity the summation over all possible wormhole configurations leads to a kind of Coleman mechanism where the cosmological constant plays no role for large universes. Observers who are unable to observe the change in topology will naturally interpret the measurements of the size of the universe as being caused by a fluctuating cosmological constant, rather than fluctuating topology of spacetime.
description: 11 pages, 2 figures
Enhancing Bark Classification with Boosted Support Vector Machines Using Bagging and Feature Selection Techniques
Creators: name: Kottilapurath Surendran, Gokul
Publisher: name: Silvilaser Conference 2023
Year: 2023
Subjects: Machine learning
Classification
Tree species classification
Bark images
Photogrammetry

description: Tree species classification is a challenging task, especially considering the classification based on two-dimensional digital images. We believe bark images have more consistency for the classification because of the usual consistency of the tree trunk pattern over different seasons.

In our study, we utilized data from a Sony (ILCE-7M2) camera with lens: E PZ 16-50 mm to analyse four species of trees in Slovakia. The dataset consisted of 1369 cropped images (cropping the entire bark) and 527 precisely cropped images (small part of the bark) of Fagus sylvatica L., Quercus petraea (Matt.) Liebl., Picea abies (L.) H. Karst., and Abies alba Mill.). However, the ordinary photographs without cropping from the Slovak dataset were not used in the research due to additional markings and numbers on the barks.

Initially, GLCM was used as a feature extractor, and the features are used with different machine learning algorithms, including Support Vector Machine (SVM). However, it failed to provide better accuracy on SVM. Therefore we implemented Convolutional Neural Networks as a feature extractor to investigate the possibilities of boosting SVM with feature selection and Bagging techniques. The research followed by pre-processing the dataset and applying feature extraction. Then applying feature selection (Lasso, Genetic Algorithms, etc.) and bagging. The final results show that SVM algorithms are provided higher accuracy of 95% and a minimum of 84% after these. The normal method's accuracy was 67% on average. In future work, we plan to develop own kernels for SVM to boost accuracy.

When we successfully identify the best approach to classifly the tree species, we will work on the implementation to the workflows of terrestrial laser scanning, mobile laser scanning and terrestrial photogrammetry.

This abstract is based upon work from COST Action 3DForEcoTech, CA20118, supported by COST (European Cooperation in Science and Technology) and APVV-20-0391, IGA-3168.
Can determinism and compositionality coexist in RML?
Creators: name: Ancona, Davide
name: Ferrando, Angelo
name: Mascardi, Viviana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: F.3.1; D.2.5

description: Runtime verification (RV) consists in dynamically verifying that the event traces generated by single runs of a system under scrutiny (SUS) are compliant with the formal specification of its expected properties. RML (Runtime Monitoring Language) is a simple but expressive Domain Specific Language for RV; its semantics is based on a trace calculus formalized by a deterministic rewriting system which drives the implementation of the interpreter of the monitors generated by the RML compiler from the specifications. While determinism of the trace calculus ensures better performances of the generated monitors, it makes the semantics of its operators less intuitive. In this paper we move a first step towards a compositional semantics of the RML trace calculus, by interpreting its basic operators as operations on sets of instantiated event traces and by proving that such an interpretation is equivalent to the operational semantics of the calculus.
description: In Proceedings EXPRESS/SOS 2020, arXiv:2008.12414. Author extended version is arXiv:2008.06453
Theory of superconductivity of carbon nanotubes and graphene
Creators: name: Sasaki, K.
name: Jiang, J.
name: Saito, R.
name: Onari, S.
name: Tanaka, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a new mechanism of carbon nanotube superconductivity that originates from edge states which are specific to graphene. Using on-site and boundary deformation potentials which do not cause bulk superconductivity, we obtain an appreciable transition temperature for the edge state. As a consequence, a metallic zigzag carbon nanotube having open boundaries can be regarded as a natural superconductor/normal metal/superconductor junction system, in which superconducting states are developed locally at both ends of the nanotube and a normal metal exists in the middle. In this case, a signal of the edge state superconductivity appears as the Josephson current which is sensitive to the length of a nanotube and the position of the Fermi energy. Such a dependence distinguishs edge state superconductivity from bulk superconductivity.
description: 5 pages, 2 figures
MPEC 2023-Y112 : 2023 DB2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Reasons For Low Fat and Solid Nonfat Milk in Dairy Cows: Causes and Solutions
Creators: name: Dr. H.V.Patel, Dr. H.A.Patel
Publisher: name: The Science world a Monthly e magazine
Year: 2023

description: In the previous few decades, dairy activities such as crossbreeding, better health care, and management have propelled India to the forefront of milk production. In India, small and medium animal holdings account for more than 75% of milk output. Because feeding accounts for roughly 70% of total input costs, any increase in dairy cattle nutrition will have a favourable influence on milk yield and quality. To fulfil the standards and compete in the open market, milk quality in terms of optimum fat, solid not fat (SNF), minimum microbial load, devoid of pollutants and endogenous toxins is critical.
Improved comparative phenotype searches between human and mouse at the HMDC
Creators: name: Bello, Susan M
name: Anagnostopoulos, Anna V
name: Baldarelli, Richard M
name: Smith, Cynthia L
name: Team, The MGI
Publisher: name: F1000 Research Limited
Year: 2025

description: The Human - Mouse Disease Connection (HMDC; https://www.informatics.jax.org/humandisease.shtml) search tool at Mouse Genome Informatics (MGI) allows users to find and compare mutant phenotype and disease associations for human and mouse genes. Users may search by gene, phenotype or disease by name, synonym or ID and/or by genome region. Searching by ID allows for users to select a precise search term. Searching by a phenotype ID restricts results to a single species because human data are annotated using Human Phenotype (HP) ontology terms while mouse data are annotated using Mammalian Phenotype (MP) ontology terms. To help users find IDs for the corresponding terms in each ontology MGI has developed an MP-HP term matcher tool. This tool uses manually curated mappings between MP and HP terms, primarily created by MGI, publicly available in SSSOM formatted files. These mappings are supplemented with lexical mappings using term label and synonym matches. Only exact text matches are used for the lexical mappings. Users may search by one or more phenotype IDs and find potential counterparts in the other phenotype ontology. The results returned include the match method and type, matched term label and synonyms, and matched term definition. For example, a search for MP:0000111 (cleft palate) returns two HP terms; HP:0000175 (cleft palate, exact match) and HP:0100337 (Bilateral cleft palate, related match). Users may select one or more of the matched terms to add to the HMDC search. Searching the HMDC using these IDs limits the results to phenotypes. A similar search for ‘cleft palate’ using the phenotype and disease name search field also includes results for disease term names that include ‘cleft palate’. Thus this new tool will improve the precision of searches in the HMDC by allowing users greater control using matched terms. Supported by NHGRI grant HG000330
From New to Large Field Inflation: Comparison with WMAP3
Creators: name: Shafi, Q.
name: Senoguz, V. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We briefly summarize and update a class of inflationary models from the early eighties based on a quartic (Coleman-Weinberg) potential for a gauge singlet scalar (inflaton) field. For vacuum energy scales comparable to the grand unification scale, the scalar spectral index n_s=0.94-0.97, in very good agreement with the WMAP three year results. The tensor to scalar ratio r~10^16 GeV, the inflationary scenario switches from `new' to `large-field' (V\proptoϕ^2) inflation. An SO(10) version naturally explains the observed baryon asymmetry via non-thermal leptogenesis.
description: 7 pages, 4 figures, 1 table. Based on a talk given by Q. Shafi at the 2nd International Conference on The Dark Side of the Universe (DSU 2006), Madrid (Spain), 20-24 June 2006
Η αναπαράσταση της αστικής και μεγαλοαστικής ζωής σε μυθιστορήματα των δεκαετιών 1920 και 1930:
Creators: name: Μπιτσιάνη, Ελένη Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αναπαράσταση
Αστική τάξη
Μεγαλοαστική τάξη
Representation
Middle class
Upper class

description: Η παρούσα διπλωματική εργασία έχει ως στόχο της την ανίχνευση και την ανάδειξη των αναπαραστάσεων της αστικής και μεγαλοαστικής ζωής σε μυθιστορήματα της δεκαετίας του 1930, καθώς και τη δειγματοληπτική παρουσίαση ανάλογων εγχειρημάτων της προηγούμενης δεκαετίας. Γενικά, οι εκπρόσωποι της γενιάς του ’30 επιχειρούν να απομακρυνθούν από την αναιμική παράδοση της ηθογραφίας και να περιγράψουν την (αθηναϊκή) αστική και μεγαλοαστική ζωή. Ο προσδιορισμός των αστών και των μεγαλοαστών μέσα στα έργα γίνεται με βάση τις «ταξικές ενδείξεις» που προσφέρουν τα ίδια τα κείμενα, ενώ η έννοια της «αναπαράστασης» αφενός παραπέμπει στην κοινόχρηστη σημασία του όρου, στην αποτύπωση δηλαδή της γύρω πραγματικότητας, και αφετέρου συνδέεται με τον αφηγηματικό τρόπο που επιλέγουν οι συγγραφείς για να αναπαραστήσουν την αστική και μεγαλοαστική ζωή (αλληγορία, ρεαλισμός). Στο πλαίσιο αυτής της μελέτης εξετάζονται οι προσφορότερες περιπτώσεις που είναι οι ακόλουθες: Κώστας Βάρναλης – Ο λαός των Μουνούχων (1923), Πέτρος Πικρός – Ο άνθρωπος που έχασε τον εαυτό του (1930), Κοσμάς Πολίτης – Λεμονοδάσος (1930), Άγγελος Τερζάκης – Η παρακμή των Σκληρών (1934), Θανάσης Πετσάλης-Διομήδης – Γερές και αδύναμες γενεές [Ο προορισμός της Μαρίας Πάρνη (1933), Το σταυροδρόμι (1934), Ο απόγονος (1935)], Θράσος Καστανάκης – Μεγάλοι αστοί (1935), Γιώργος Θεοτοκάς – Αργώ (1936) και Μ. Καραγάτσης – Γιούγκερμαν (1938).
description: This thesis aims to detect and highlight the representations of middle class and upper class life in novels of the 1930s, along with the sample presentation of similar ventures of 1920s. Generally, representatives of the 30's are trying to move away from the weak tradition of narrations of manners (“ethografia”) and describe the (Athenian) middle class and upper class life. The determination of the middle class and the upper class in the works is based on the ‘‘class evidences’’ offered by the texts themselves, whereas the concept of ‘‘representation’’ refers to the common meaning of the term, the mapping of the surrounding reality, and it is, also, related to the narrative mode chosen by the authors to represent middle class and upper class life (allegory, realism). In this study, the more appropriate cases, which are examined, are: Ο λαός των Μουνούχων (1923) by Kostas Varnalis, Ο άνθρωπος που έχασε τον εαυτό του (1930) by Petros Pikros, Λεμονοδάσος (1930) by Kosmas Politis, Η παρακμή των Σκληρών (1934) by Aggelos Terzakis, Γερές και αδύναμες γενεές [Ο προορισμός της Μαρίας Πάρνη (1933), Το σταυροδρόμι (1934), Ο απόγονος (1935)] by Thanassis Petsalis-Diomidis, Μεγάλοι αστοί (1935) by Thrassos Kastanakis, Αργώ (1936) by George Theotokas and Γιούγκερμαν (1938) by M. Karagatsis.