cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scoparone from Artemisia capillaris Thunb. induces apoptosis in HepG2 cells via activation of both intracellular and extracellular pathways
Creators: name: Zheng, Bowen
name: Song, Weichen
name: Liu, Chunlong
name: Kou, Xiaohong
name: Yu, Yue
name: Wang, Yumeng
name: Ma, Juan
name: Liu, Yazhou
name: Jiang, Jingyu
name: Xue, Zhaohui
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Six separated compounds were identified from Artemisia capillaris Thunb., and they were 7-methoxycoumarin (1), 6,7-dimethoxycoumarin (2), 7-hydroxy-6-methoxycoumarin (3), quercetin (4), chlorogenic acid (5) and caffeic acid (6). Among them, 6,7-dimethoxycoumarin, as known as scoparone, was the most effective on scavenging ABTS free radicals (IC50 = 0.97 μΜ) and was then tested by cytotoxic activity and pro-apoptotic activity against HepG2 cells. Scoparone dose-dependently and time-dependently inhibited the cell proliferation. Furthermore, scoparone induced the expression of Bax, concurrently suppressing the expression of Bcl-2, resulting in a noteworthy elevation in the Bax/Bcl-2 ratio to up-regulate Caspase-3 activity, thus inducing cell apoptosis via the intracellular pathway. Meanwhile, scoparone promoted the expression of Fas, FasL, FADD, Caspase-8 and Caspase-3, indicating that scoparone also triggered apoptosis via the extracellular pathway. In a word, scoparone demonstrated remarkable antitumor capability to induce apoptosis of HepG2 cells through both intracellular and extracellular pathways.
title: Employment of American and British first language textbooks as a foreign language resource in private schools in South Lebanon
Creators: name: Chalhoub, Faten
name: Hodkinson, Alan
name: Ververi, Olga
Publisher: name: IARTEM e-journal
Year: 2014

description: This article presents the findings of research that examined how teachers employed first language textbooks to teach English as a foreign language and to develop the intercultural competences of their students. The research employed semi-structured phenomenological interviews and questionnaires with eight South Lebanese educators. The findings demonstrates how in relation to language learning, the employment of foreign textbooks produces successful results. The research though also details how teachers have to work hard to bridge the cultural gaps between their students and the ‘alien’ cultures detailed in the textbooks. Problematic, it would appear to the development of inter cultural competence is that in South Lebanon some cultures, noticeably that of Judaism, and some topics, such as sexuality, that schools, teachers but moreover parents control how and indeed if, students are inculcated into wider cultures and debates. The conclusion of the research details how in the development of intercultural competence that teachers are the key mediators of students’ responses to cultures and practices other than their own.
description: IARTEM e-journal, Vol. 6 No. 2 (2014)
Dimethyl sulphide in some Australian red wines
Creators: name: De Mora, S. J.
name: Knowles, S. J.
name: Eschenbruch, R.
name: Torrey, W. J.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: DMS levels in Cabernet Sauvignon wine from the Coonawarra area of southeast South Australia were shown to vary from 42 to 910 μg l-1. Results indicate that the levels are not dependent on age but rather vary from vintage to vintage. This study does not discount the development of DMS with bottle age as it is an 'historical' survey but suggests that the levels of DMS are vintage related and may depend on viticultural practices and vinification techniques. The odour threshold for DMS in Cabernet Sauvignon was 0.07 μl l-1 (60μg l -1).
description: VITIS - Journal of Grapevine Research, Vol. 26 No. 2 (1987): VITIS
GraFN: Semi-Supervised Node Classification on Graph with Few Labels via Non-Parametric Distribution Assignment
Creators: name: Lee, Junseok
name: Oh, Yunhak
name: In, Yeonjun
name: Lee, Namkyeong
name: Hyun, Dongmin
name: Park, Chanyoung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Despite the success of Graph Neural Networks (GNNs) on various applications, GNNs encounter significant performance degradation when the amount of supervision signals, i.e., number of labeled nodes, is limited, which is expected as GNNs are trained solely based on the supervision obtained from the labeled nodes. On the other hand,recent self-supervised learning paradigm aims to train GNNs by solving pretext tasks that do not require any labeled nodes, and it has shown to even outperform GNNs trained with few labeled nodes. However, a major drawback of self-supervised methods is that they fall short of learning class discriminative node representations since no labeled information is utilized during training. To this end, we propose a novel semi-supervised method for graphs, GraFN, that leverages few labeled nodes to ensure nodes that belong to the same class to be grouped together, thereby achieving the best of both worlds of semi-supervised and self-supervised methods. Specifically, GraFN randomly samples support nodes from labeled nodes and anchor nodes from the entire graph. Then, it minimizes the difference between two predicted class distributions that are non-parametrically assigned by anchor-supports similarity from two differently augmented graphs. We experimentally show that GraFN surpasses both the semi-supervised and self-supervised methods in terms of node classification on real-world graphs. The source code for GraFN is available at https://github.com/Junseok0207/GraFN.
description: SIGIR 2022(Short Paper)
title: Σήματα και Συστήματα
Creators: name: Karampogias, Serafeim
Publisher: name: Kallipos, Open Academic Editions
Year: 2016
Subjects: ΣΗΜΑΤΑ ΚΑΙ ΣΥΣΤΗΜΑΤΑ
ΚΡΟΥΣΤΙΚΗ ΑΠΟΚΡΙΣΗ
ΣΥΝΑΡΤΗΣΗ ΜΕΤΑΦΟΡΑΣ
ΜΕΤΑΣΧΗΜΑΤΙΣΜΟΣ ΦΟΘΡΙΕΡ
ΜΕΤΑΣΧΗΜΑΤΙΣΜΟΣ ΛΑΠΛΑΣ
ΜΕΤΑΣΗΜΑΤΙΣΜΟΣ Ζ
ΦΙΛΤΡΑ
Signals And Systems
Fourier Transform
Laplase Transform
Z Transform
Filters

description: Το σύγγραμμα συνοδεύεται και από μια σειρά λυμένων ασκήσεων, γενικών και ανά κεφάλαιο.
description: Στη σημερινή εποχή της κοινωνίας τη πληροφορίας, που χαρακτηρίζεται
από τη σύγκλιση και ενοποίηση διαφορετικών μέχρι τώρα επιστημονικών περιοχών,
το πεδίο των σημάτων και των συστημάτων αποτελεί πλέον ένα ενιαίο σύνολο
βασικών και θεμελιωδών γνώσεων για ένα ευρύ φάσμα περιοχών που σχετίζονται
με τον ένα ή άλλο τρόπο με την παραγωγή, την επεξεργασία, την αποθήκευση και την μετάδοση της πληροφορίας.

Βασικός σκοπός του βιβλίου είναι να εισαγάγει τον αναγνώστη στις βασικές
τεχνικές ανάλυσης και μελέτης των σημάτων και συστημάτων με ενιαίο τρόπο
και να του προσφέρει τα κατάλληλα μαθηματικά εργαλεία, με τα
οποία μπορεί να χειριστεί τα σήματα και τα συστήματα. Έχει καταβληθεί
προσπάθεια να δοθούν οι θεωρητικές έννοιες με απλό τρόπο και να συνδεθούν
με αντίστοιχες έννοιες της φυσικής. Η επιλογή των παραδειγμάτων έγινε με γνώμονα
τη χρησιμότητά τους ώστε να βοηθούν τον αναγνώστη να εμπεδώσει τη θεωρία και να
κατανοήσει τις τεχνικές προσέγγισης και αντιμετώπισης των προβλημάτων.

Οι βασικές θεματικές ενότητες του Μαθήματος Σήματα και Συστήματα
αναπτύσσονται σε οκτώ κεφάλαια.

Σε κάθε κεφάλαιο υπάρχουν ασκήσεις στις οποίες δε δίνεται η λύση τους.
Επίσεις υπάρχουν ασκήσεων στις οποίες ο φοιτητής έχει τη δυνατότηταί να έχει σταδιακά
i) μόνο το τελικό αποτέλεσμα προς διασταύρωση με τη δική του λύση,
ii) υποδείξεις για την μέθοδο επίλυσης της άσκησης,
iii) παρατηρήσεις ως προς τους εναλλακτικούς τρόπους λύσεις και
iv) πλήρη λύση της άσκησης.
Τέλος υπάρχουν σειρές ασκήσεων εξατομικευμένων μέσω κωδικού. Οι ασκήσεις αυτές έχουν επιλεγεί με σκοπό να καλύπτουν την ύλη του κεφαλαίου και να δίνεται η δυνατότητα στο επιμελή φοιτητή να εμπεδώσει ασκούμενος τις αντίστοιχες έννοιες του μαθήματος. Ο φοιτητής έχει τη δυνατότητα να υποβάλει ηλεκτρονικά τις απαντήσεις του και να λάβει την εκτίμηση της απόδοσής του και να λάβει τις ορθές απαντήσεις των ασκήσεων.
title: Knowledge of teaching resources in the training of primary and lower secondary school teachers
Creators: name: Viggo Iversen, Jan
Publisher: name: IARTEM e-journal
Year: 2014

description: This article builds on a study (Iversen, 2013) about the knowledge of teaching resources in the education of primary and lower secondary school teachers. The data comes from focus group interviews and video observations of students divided into two practice groups in a class of 17. The period of teaching covers two weeks. The students were located in the Resource Centre1 he Resource Centre is a resource centre for teaching resources, play materials, communication material and technological resources for children, young people and adults. The object of the research is to examine how the Resource Centre influences primary and lower secondary school teacher trainees (henceforth called students) in their choice of teaching resources appropriate for pupils in the first to third class in primary school. Other significant factors are the students’ background and experience from primary and lower secondary education, subject teachers, the practice group and the pupils in the school. The analysis of the data can indicate that students who desire the professional development for teachers are bearers of a tradition which leads to the reproduction of a distinct culture of teaching and therefore certain teaching resources. Model teaching seems to have great significance for what the students choose from the teaching resources. The subject teachers at the College and the supervising teachers are important models for the students. This study uses theory inspired by the French sociologist, Pierre Bourdieu. This theory is suited to create distance to the normal weekday I inhabit as a researcher, and which influences the reality of the social practice.
description: IARTEM e-journal, Vol. 6 No. 2 (2014)
Polyphyllin I inhibits endometriosis in vitro by inducing apoptosis and autophagy via the inactivation of AKT/mTOR signalling pathway
Creators: name: Li, Liping
name: Hu, Qiwen
name: Chen, Jin
name: Zhang, Xiumei
name: Wang, Jinhua
name: Luo, Yong
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Previous research has indicated that Polyphyllin I (PPI) possesses potent anticancer properties. However, its impact on endometriosis remains unexplored. This study aims to investigate the inhibitory effects of PPI on ectopic endometrial stromal cells (EESCs). The CCK-8 and flow cytometry results respectively showed that the cell viability of EESCs decreased and the number of apoptotic cells increased in a dosage dependent of PPI. Wound healing and transwell assays demonstrated a notable reduction in cell motility and migration ability in the PPI group. Moreover, the Western blot analysis revealed a decrease in p62 levels and an increase in LC3-II expression following PPI administration. Additionally, the protein levels of p-Akt and p-mTOR were observed to decrease with increasing concentrations of PPI, indicating the potential of PPI to induce autophagy in EESCs through modulation of the Akt/mTOR signalling pathway. Consequently, PPI holds promise as a targeted therapeutic agent for the management of endometriosis.
Better automation of beamline control at HEPS
Creators: name: Liu, Yu
name: Dong, Xue-Wei
name: Li, Gang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: At the High Energy Photon Source (HEPS) where up to 90 beamlines can be provided in the future, minimisation of workload for individual beamlines and maximisation of knowledge about one beamline that can be applied to other beamlines is essential to minimise the total complexity in beamline control. Presented in this paper are our efforts to achieve these goals by composing relatively simple utilities and mechanisms to automate tasks, and always remembering to keep our automation solutions simple and clear. After an introduction to our choice of basic software in EPICS-based beamline control, the issues encountered in introducing package management to EPICS modules, as well as our solutions to them, are presented; then the design and implementation of our packaging system is concisely discussed. After a presentation of our efforts to reduce the need for self-built multi-device EPICS IOC applications by providing reusable modular IOC executables, our implementation of easily maintainable multi-IOC setups through the separation and minimisation of each user's IOC configurations is given. Finally, the ongoing project of comprehensive beamline services at HEPS to further simplify configuration management on multiple scales, ranging from individual beamline devices to all beamlines at HEPS, is introduced.
description: 15 pages, 10 figures, accepted for J. Synchrotron Rad
title: Medical Informatics
title: Biomedical Digital Signal Processing
titleType: AlternativeTitle
title: Ιατρική πληροφορική
title: Ψηφιακή Επεξεργασία Βιοϊατρικών Σημάτων
titleType: AlternativeTitle
Creators: name: Tsipouras, Markos
name: Giannakeas, Nikolaos
name: Karvounis, Evangelos
name: Tzallas, Alexandros
Publisher: name: Kallipos, Open Academic Editions
Year: 2016
Subjects: ΙΑΤΡΙΚΗ ΠΛΗΡΟΦΟΡΙΚΗ
ΙΑΤΡΙΚΗ ΠΛΗΡΟΦΟΡΑ
ΠΡΟΤΥΠΑ ΚΩΔΙΚΟΠΟΗΣΗΣ ΙΑΤΡΙΚΗΣ ΠΛΗΡΟΦΟΡΑΣ
ΙΑΤΡΙΚΗ ΟΝΟΜΑΤΟΛΟΓΑ
ΙΑΤΡΙΚΗ ΚΑΤΗΓΟΡΙΟΠΟΗΣΗ
ΙΑΤΡΙΚΑ ΠΛΗΡΟΦΟΡΙΑΚΑ ΣΥΣΤΗΜΑΤΑ
ΠΛΗΡΟΦΟΡΙΑΚΑ ΣΥΣΤΗΜΑΤΑ ΥΓΕΑΣ
ΗΛΕΚΤΡΟΝΙΚΟΣ ΦΑΚΕΛΟΣ ΑΣΘΕΝΟΥΣ
ΙΑΤΡΙΚΟΣ ΦΑΚΕΛΟΣ ΑΣΘΕΝΟΥΣ
ΤΗΛΕΪΑΤΡΙΚΗ
ΠΛΗΡΟΦΟΡΙΑΚΑ ΣΥΣΤΗΜΑΤΑ ΤΗΛΕΪΑΤΡΙΚΗΣ
ΚΙΝΗΤΗ ΥΓΕΑ
ΣΥΣΤΗΜΑΤΑ ΥΠΟΣΤΗΡΙΞΗΣ ΑΠΟΦΑΣΗΣ ΣΤΗΝ ΙΑΤΡΙΚΗ
ΕΥΦΥΗ ΠΛΗΡΟΦΟΡΙΑΚΑ ΣΥΣΤΗΜΑΤΑ ΣΤΗΝ ΙΑΤΡΙΚΗ
ΕΜΠΕΙΡΑ ΣΥΣΤΗΜΑΤΑ ΣΤΗΝ ΙΑΤΡΙΚΗ
ΒΙΟΪΑΤΡΙΚΑ ΣΗΜΑΤΑ
ΒΙΟΣΗΜΑΤΑ
ΨΗΦΙΑΚΗ ΕΠΕΞΕΡΓΑΣΑ ΒΙΟΪΑΤΡΙΚΩΝ ΣΗΜΑΤΩΝ
ΗΛΕΚΤΡΟΚΑΡΔΙΟΓΡΑΦΗΜΑ
ΨΗΦΙΑΚΗ ΕΠΕΞΕΡΓΑΣΑ ΗΛΕΚΤΡΟΚΑΡΔΙΟΓΡΑΦΗΜΑΤΟΣ
ΗΚΓ
ΔΙΑΚΥΜΑΝΣΗ ΚΑΡΔΙΑΚΟΥ ΡΥΘΜΟΥ
ΨΗΦΙΑΚΗ ΕΠΕΞΕΡΓΑΣΑ ΔΙΑΚΥΜΑΝΣΗΣ ΚΑΡΔΙΑΚΟΥ ΡΥΘΜΟΥ
ΔΚΡ
ΗΛΕΚΤΡΟΕΓΚΕΦΑΛΟΓΡΑΦΗΜΑ
ΨΗΦΙΑΚΗ ΕΠΕΞΕΡΓΑΣΑ ΗΛΕΚΤΡΟΕΓΚΕΦΑΛΟΓΡΑΦΗΜΑΤΟΣ
ΗΕΓ
ΗΛΕΚΤΡΟΜΥΟΓΡΑΦΗΜΑ
ΨΗΦΙΑΚΗ ΕΠΕΞΕΡΓΑΣΑ ΗΛΕΚΤΡΟΜΥΟΓΡΑΦΗΜΑΤΟΣ
ΗΜΓ
ΕΜΒΡΥΑΚΟ ΗΛΕΚΤΡΟΚΑΡΔΙΟΓΡΑΦΗΜΑ
ΨΗΦΙΑΚΗ ΕΠΕΞΕΡΓΑΣΑ ΕΜΒΡΥΑΚΟΥ ΗΛΕΚΤΡΟΚΑΡΔΙΟΓΡΑΦΗΜΑΤΟΣ
ΕΗΚΓ
Medical Informatics
Medical Information
Medical Information Standarts
Medical Nomeclature
Medical Classification
Medical Information Systems
Health Information Systems
Digital Medical Record
Patient Medical Records
Telemedicine
Information Systems Telemedicine
Mobile Health
Medical Decision Support Systems
Medical Intelligent Information Systems
Medical Expert Information Systems
Biomedical Signals
Biosignals
Biomedical Signal Processing
Electrocardiogram
Digital Electrocardiogram Processing
ECG
Heart Rate Variability
Heart Rate Variability Analysis
HRV
Electroencephalogram
Digital Electroencephalogram Processing
EEG
Electromyography
Digital Electromyography Processing
EMG
Fetal Electrocardiogram
Digital Fetal Electrocardiogram Processing
FECG

description: Το βιβλίο «Ιατρική Πληροφορική» θα απευθύνεται σε προπτυχιακούς και μεταπτυχιακούς φοιτητές που διδάσκονται το αντικείμενο της ιατρικής πληροφορικής και των εφαρμογών των πληροφοριακών συστημάτων στην ιατρική καθώς επίσης και της επεξεργασίας βιοϊατρικών σημάτων. Επιπλέον, θα μπορεί να χρησιμοποιηθεί τόσο από μη ειδικούς αναγνώστες όσο και από ερευνητές του συγκεκριμένου πεδίου.
QCM-D viscoelastic and adhesion monitoring facilitates label-free and strain-selective bacterial discrimination
Creators: name: Instituut voor Landbouw en Visserijonderzoek
Publisher: name: Zenodo
Year: 2023

description: Discriminating bacterial adhesion profiles at strain-specific level is crucial for simulating and predicting infections and persistence, as well as developing more efficient antibacterial therapies. Hereby, we propose that label- and receptor-free bacterial discrimination can be achieved by dynamic viscoelastic and adhesion monitoring over specified timescales using the quartz crystal microbalance with dissipation monitoring (QCM-D). Using two closely related E. coli strains, ATCC® 8739, and JM109(DE3), we show that their viscoelastic and adhesion properties evolve in time through strain-specific profiles that are clearly distinguishable over a period of 3 to 4 hours. In addition, the viscoelasticity of both E. coli strains shows a strong strain-specific dependence on the medium ionic strength, allowing to further amplify the differences in the bacterial adhesion signatures. Furthermore, we compared the viscoelastic and adhesion behaviours of the two E. coli strains with two additional bacteria, Citrobacter freundii and Serratia marcescens. For all four bacteria, distinct viscoelastic profiles, and adhesion fingerprints emerge over similar timescales that allow to reliably discriminate the various bacteria. These results, and similar studies on other bacteria might have pharmacological benefits: For instance, by highlighting the role of bacterial-substrate adhesion and viscoelastic properties on disease pathogenesis and persistence, towards developing more effective therapies.
IARTEM e-journal, Vol. 6 No. 2 (2014)
Creators: name: IARTEM E-Journal
Publisher: name: IARTEM e-journal
Year: 2014

description: Predicting Teachers’ Choice of Teaching and Learning Materials: A Survey Study with Swedish Teachers...71-93 Knowledge of teaching resources in the training of primary and lower secondary school teachers...44-70 Employment of American and British first language textbooks as a foreign language resource in private schools in South Lebanon...21-37 The analysis of discursive constructions of national identity in Polish literature textbooks...1-19
A Concise Synthesis and Cellular Evaluation of 3′-formyl-4′,6′-dihydroxy-2′-methoxy-5′-methylchalcone (FMC) and Its Analogues
Creators: name: Zhuo, Xiang
name: En-Zhen, Li
name: Hai, Liang
name: Hong-Ju, Guo
name: Ning, Shi
name: Xue-Hui, Zhang
name: Qi-Fang, Qian
name: Jiu-Hong, Wu
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Developmental Biology
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Cell Biology
subject: Biochemistry
subject: Biophysics

description: 3′-Formyl-4′,6′-dihydroxy-2′-methoxy-5′-methylchalcone (FMC) was a natural product isolated from Cleistocalyx operculatus. A four steps synthetic strategy toward FMC and its four analogues (1b-1e) was firstly developed. All compounds were synthesized from commercially available 2,4,6-trihydroxyacetophenone, formylation at 3' position under Vilsmeier-Haack condition was followed by the introduction of methyl group at 5' position. The key step of selective methylation at 2' position was achieved by trimethylsilyldiazomethane (TMSCHN2). Then substituted aromatic aldehydes were condensed through Claisen-Schmidt reaction in the presence of potassium hydroxide. All structures were confirmed by 1H-NMR, 13C-NMR, and HRMS spectra. FMC and analogues were screened for their antiproliferative activity.
title: Η επιστήμη των δεδομένων μέσα από τη γλώσσα R
title: ΒΑΣΙΚΕΣ ΚΑΙ ΠΡΟΧΩΡΗΜΕΝΕΣ ΕΝΝΟΙΕΣ
titleType: AlternativeTitle
Creators: name: Verykios, Vasileios
name: Kagklis, Vasileios
name: Stavropoulos, Elias
Publisher: name: Kallipos, Open Academic Editions
Year: 2016
Subjects: subject: ΕΞΟΡΥΞΗ ΔΕΔΟΜΕΝΩΝ
subject: ΣΤΑΤΙΣΤΙΚΗ
subject: ΕΠΙΣΤΗΜΗ ΤΩΝ ΔΕΔΟΜΕΝΩΝ
subject: ΑΝΑΛΥΣΗ ΜΕΓΑΛΩΝ ΔΕΔΟΜΕΝΩΝ
subject: ΜΗΧΑΝΙΚΗ ΜΑΘΗΣΗ
subject: ΔΕΝΤΡΑ ΑΠΟΦΑΣΗΣ
subject: ΚΑΝΟΝΕΣ ΣΥΣΧΕΤΙΣΗΣ
subject: ΚΑΤΗΓΟΡΙΟΠΟΙΗΣΗ
subject: ΣΥΣΤΑΔΟΠΟΙΗΣΗ
subject: ΚΑΘΑΡΙΣΜΟΣ ΔΕΔΟΜΕΝΩΝ
subject: ΑΝΑΛΥΤΙΚΗ ΕΠΕΞΕΡΓΑΣΙΑ ΔΕΔΟΜΕΝΩΝ
subject: Data Mining
subject: Statistics
subject: FOS: Mathematics
subject: Data Science
subject: Big Data Analytics
subject: Machine Learning
subject: Decision Trees
subject: Association Rules
subject: Classification
subject: Clustering
subject: Data Cleaning
subject: NoSQL Databases
subject: OLAP
subject: Hadoop
subject: Mapreduce

description: Η αυξανόμενη συσσώρευση μεγάλων ποσοτήτων δεδομένων δημιουργεί νέες ευκαιρίες στους τομείς: επιστήμη, οικονομία, εκπαίδευση, έρευνα, κ.λ.π. Παλαιότερα είτε η αποθήκευση τέτοιων δεδομένων δεν ήταν εφικτή, είτε η ανάλυσή τους ξεπερνούσε κατά πολύ τις υπολογιστικές δυνατότητες των σύγχρονων υπολογιστικών συστημάτων. Σήμερα που έχει επέλθει η τεχνολογική σύγκλιση στους παραπάνω τομείς υπάρχει ανάγκη για την εκπαίδευση επιστημόνων οι οποίοι θα μπορούν να ανταπεξέλθουν στις σύγχρονες ανάγκες, δίνοντας λύσεις σε σοβαρά ζητήματα μέσω της ευφυούς ανάλυσης δεδομένων.
Σκοπός του βιβλίου είναι να καταγράψει τις βασικές αρχές που διέπουν τη νέα αυτήν επιστήμη των δεδομένων, που είναι γνωστή και ως Εξόρυξη Δεδομένων. Το βιβλίο ξεκινάει με την περιγραφή της υπάρχουσας κατάστασης στον τομέα της εξόρυξης γνώσης από τα δεδομένα, τους τομείς στους οποίους αυτή βασίζεται και τις νέες προκλήσεις. Στη συνέχεια καλύπτει ζητήματα πολυδιάστατων δεδομένων και δημιουργίας αναφορών, όπως και ζητήματα νέων μορφών βάσεων δεδομένων, (NoSQL συστήματα). Οι τύποι και η ποιότητα των δεδομένων αποτελούν αναπόσπαστο κομμάτι του βιβλίου που μαζί με την επεξεργασία και τα μέτρα ομοιότητας αποτελούν τη βάση ενός έργου εξόρυξης δεδομένων.
Η συνοπτική στατιστική και η οπτικοποίηση αποτελούν το πρώτο βήμα για την εξερεύνηση των δεδομένων. Το κύριο κομμάτι του βιβλίου αφορά τη λεπτομερή περιγραφή και ανάλυση εναλλακτικών αλγορίθμων για την εκπόνηση των βασικών λειτουργιών της Εξόρυξης Δεδομένων οι οποίες είναι η Κατηγοριοποίηση, η Ανάλυση Συσχετίσεων και η Ανάλυση Συστάδων. Πιο προχωρημένα ζητήματα που αφορούν την εκτίμηση των παραγόμενων μοντέλων, τη σύγκρισή τους και τη γρηγορότερη εκτέλεσή τους επίσης καλύπτονται στο τελευταίο κομμάτι του βιβλίου. Όλα τα θέματα αναλύονται σε βάθος μέσω προγραμμάτων στη γλώσσα R.
Ένας μεγάλος αριθμός από λυμένες ασκήσεις βοηθούν στην κατανόηση και στην εμπέδωση των εννοιών, ενώ άλυτα προβλήματα θα βοηθήσουν το φοιτητή να αναπτύξει μία ολοκληρωμένη άποψη για το θέμα αυτό.
title: Predicting Teachers’ Choice of Teaching and Learning Materials: A Survey Study with Swedish Teachers
Creators: name: Reichenberg, Monica
Publisher: name: IARTEM e-journal
Year: 2014

description: Few Swedish studies have investigated how teachers choose teaching and learning materials. In the context of choosing teaching and learning materials Sweden provides a particularly interesting case because the country undergone a transformation from high state regulation to a self-regulated market. Consequently, the overall aim of this article is to investigate how teachers choose teaching and learning materials. The following research questions were the focus: How do teachers choose teaching and learning materials? What predicts teachers’ choice of teaching and learning materials? In the current study, 319 teachers filled out a questionnaire regarding their choice of teaching and learning materials. The descriptive statistics indicate that the content matters most to teachers when choosing teaching and learning materials. Readability is in the middle and commercials are at the bottom. The non-recursive structure of the model demonstrated that professional experience decreases teachers’ preferences for content. Talking to colleagues about teaching and learning materials increases teachers’ preferences for adhering to collegial recommendations. Special educators are more concerned with content and readability than ordinary teachers. However, special educators are also less prone to be guided by past experiences when selecting teaching and learning materials.
description: IARTEM e-journal, Vol. 6 No. 2 (2014)
Versatile coating platform for metal oxide nanoparticles: applications to materials and biological science
Creators: name: Berret, Jean-Francois
name: Graillot, Alain
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this feature article, we provide an overview of our research on statistical copolymers as a coating material for metal oxide nanoparticles and surfaces. These copolymers contain functional groups enabling non-covalent binding to oxide surfaces and poly(ethylene glycol) (PEG) polymers for colloidal stability and stealthiness. The functional groups are organic derivatives of phosphorous acid compounds R-H$_2$PO$_3$, also known as phosphonic acids that have been screened for their strong affinity to metals and their ability to build multidentate binding. Herein we develop a polymer-based coating platform that shares features with the techniques of self-assembled monolayers (SAM) and Layer-by-Layer (L-b-L) deposition. The milestones of this endeavor are the synthesis of PEG-based copolymers containing multiple phosphonic acid groups, the implementation of simple protocols combining versatility with high particle production yields and the experimental demonstration of the colloidal stability of the coated particles. As a demonstration, coating studies are conducted on cerium (CeO$_2$), iron ($γ$-Fe$_2$O$_3$), aluminum (Al$_2$O$_3$) and titanium (TiO$_2$) oxides of different sizes and morphologies. We finally discuss applications in the domain of nanomaterials and nanomedicine. We evaluate the beneficial effects of coating on redispersible nanopowders, contrast agents for In Vitro/Vivo assays and stimuli-responsive particles.
description: 28 pages 10 figures, accepted at Langmuir as Invited Feature Article
Psiguanol, a novel α-pyrone derivative from Psidium guajava leaves and vasorelaxant activity in rat aorta cells through intracellular cGMP-dependent opening of calcium-activated potassium channels
Creators: name: Srivastava, Shraddha
name: Mishra, Divya
name: Bisht, Rohit
name: Savita, Kumari
name: Singh, Kishan
name: Rani, Poonam
name: Chanda, Debabrata
name: Dev, Kapil
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: The phytochemical investigation of Psidium guajava leaves led to the isolation of total nineteen compounds which belongs to meroterpenoids, flavonoid, phenolics, and triterpenoids. The compounds were isolated using extensive chromatography techniques and identified as psiguanol (4), as new compound along with guajadial (1), psidial A (2), β-caryophyllene (3), quercetin (5), avicularin (6), guaijaverin (7), hyperin (8), rutin (9), ursolic acid (10), corosolic acid (11), asiatic acid (12), β-sitosterol (13), β-sitosterol-D-glucoside (14), ellagic acid (15), 3,3',4'-trimethylellagic acid 4-O-glucoside (16), protocatechuic acid (17), gallic acid (18), and tricosanoic acid (19) as known molecules. The compound 16 was isolated for the first time from this plant. The isolated compounds were evaluated for vasorelaxation activity in rat aorta cells and it was observed that compound 4 exhibited the most potent vasorelaxation response in the ex-vivo model in isolated rat aorta cells. Mechanistically, the vasorelaxation activity of 4 was mediated through cGMP-dependent BKCa channel opening.
On critical variable-order Kirchhoff type problems with variable singular exponent
Creators: name: Zuo, Jiabin
name: Choudhuri, Debajyoti
name: Repovš, Dušan D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 35R11, 35J75, 35J60, 46E35

description: We establish a continuous embedding $W^{s(\cdot),2}(Ω)\hookrightarrow L^{α(\cdot)}(Ω)$, where the variable exponent $α(x)$ can be close to the critical exponent $2_{s}^*(x)=\frac{2N}{N-2\bar{s}(x)}$, with $\bar{s}(x)=s(x,x)$ for all $x\in\barΩ$. Subsequently, this continuous embedding is used to prove the multiplicity of solutions for critical nonlocal degenerate Kirchhoff problems with a variable singular exponent. Moreover, we also obtain the uniform $L^{\infty}$-estimate of these infinite solutions by a bootstrap argument.
Chemical annotation of the infusion of Jungia floribunda Less and its inhibitory potential on the elastase enzyme
Creators: name: Ribeiro, Andreza Aparecida
name: Santos, Jorge Alexandre Nogueira
name: de Oliveira Salem, Paula Pio
name: Santos, Mario Ferreira Conceição
name: Bueno, Paula Carolina Pires
name: Lago, João Henrique Ghilardi
name: Dias, Danielle Ferreira
name: de Paula, Daniela Aparecida Chagas
name: Soares, Marisi Gomes
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Jungia floribunda Less. is a shrub belonging to the Asteraceae. The infusion of its leaves has been used, in folk medicine of several South American countries, as anti-inflammatory and hypoglycaemic agent. In the present study, the infusion of leaves from J. floribunda was obtained and its chemical composition was determined by UHPLC-MS associated with molecular network allowing the annotation of flavonoids, sesquiterpene lactones, coumarins, and chlorogenic acid derivatives. Besides, in vitro elastase activity assay was carried out with the infusion. As observed, elastase was inhibited at concentrations ranging from 15 to 240 µg/mL, reaching to 71% of inhibition at the maximum of evaluated concentration. Given that species of plants are promising sources for the discovery of new drugs, these results corroborate the infusion of J. floribunda as a potential source of bioactive compounds for the discovery of new inhibitors for elastase, besides its ethnopharmacological aspects.
Glaciers and equilibrium line altitudes of the eastern Nyainqêntanglha Range, SE Tibet
Creators: name: Loibl, David Matthias
name: Lehmkuhl, Frank
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Computational Biology

description: A set of maps that illustrate the key results of a study on glaciers and late Holocene glacier change in the eastern Nyainqêntanglha Range, southeastern Tibet, is presented. The cartographic challenge was to present this information in a way that focuses on the most important findings but retains as much detail as possible. The layout is based on two main maps showing two different sets of information for the same area; one map of glacier types and distribution and one map of calculated equilibrium line altitudes (ELA). Additionally, two inset maps provide a regional topographic overview and information on ELA change since the Little Ice Age maximum glacier advance. Through this approach, the viewer is able to combine the different sets of information individually for different parts of the study area. Insights into the complex couplings of climate, relief, and glaciers can thus be obtained. The maps reveal heterogeneous spatial patterns of glacier and ELA distributions. These reflect the interplay of the high-mountain topography and the primary moisture sources, the Indian Summer Monsoon and the East Asian Summer Monsoon. Specifically, luv-lee effects and the channeling of monsoonal air masses through the valley system can be observed at catchment to regional scales. The patterns of ELA change since the Little Ice Age indicate that glacier sensitivity to climate change is decreasing toward regions with increasingly continental climate in the eastern Nyainqêntanglha Range.
title: Γνώση, μέθοδος και κοινωνική πράξη
title: ΑΠΟ ΤΗ ΓΝΩΣΙΟΘΕΩΡΙΑ ΣΤΗΝ ΚΟΙΝΩΝΙΟΛΟΓΙΑ ΤΗΣ ΓΝΩΣΗΣ
titleType: AlternativeTitle
Creators: name: Nagopoulos, Nikolaos
Publisher: name: Kallipos, Open Academic Editions
Year: 2016
Subjects: ΚΟΙΝΩΝΙΟΛΟΓΙΑ ΤΗΣ ΓΝΩΣΗΣ
ΘΕΩΡΙΑ ΚΑΙ ΜΕΘΟΔΟΛΟΓΙΑ ΚΟΙΝΩΝΙΚΗΣ ΕΠΙΣΤΗΜΗΣ
ΕΠΙΣΤΗΜΟΛΟΓΙΑ ΚΟΙΝΩΝΙΚΩΝ ΕΠΙΣΤΗΜΩΝ
Sociology Of Knowledge
Theory And Methodology Of Social Sciences
Epistemology Of Social Sciences

description: Το βιβλίο αυτό επιχειρεί μία συζήτηση των πρώιμων γνωσιοθεωρητικών προσεγγίσεων και στη συνέχεια εξετάζει την σύνδεση της κοινωνιολογίας με την γνωσιοθεωρία. Από τις πρώιμες γνωσιοθεωρητικές προσεγγίσεις μέχρι τη νέα Κοινωνιολογία της γνώσης, αναλύονται οι μέθοδοι και οι θεωρητικές οπτικές πού εξετάζουν την γνώση, καί τις ανθρώπινες πράξεις. Το ποιοτικό γνώρισμα που καθιστά μία πράξη κοινωνική είναι η διυποκειμενικότητα της, δηλαδή ο προσανατολισμός της στη συμπεριφορά άλλου ατόμου. Η σαφής διάκριση μεταξύ πράξης και κοινωνικής πράξης έτσι όπως αποτυπώνεται στη βεμπεριανή κατανοούσα κοινωνιολογία αποκαλύπτει και το αντικείμενο των κοινωνικών επιστημών, που καλούνται να κατανοήσουν μόνον εκείνες τις πράξεις που χαρακτηρίζονται ως κοινωνικές και οι οποίες μπορούν να εξηγηθούν αιτιωδώς, γιατί αποκαλύπτουν την ορθολογικότητα και το κίνητρο που ερμηνεύει την εκδήλωσή τους, ενώ παράλληλα αποτυπώνουν αντικειμενικά κοινωνικά πρότυπα υπό μορφή ιδεοτύπων. Κατά αυτόν τον τρόπο στην πρώιμη Γνωσιοθεωρία επιτελείται μια κοινωνιολογική στροφή καθώς η γνώση μελετάται ως κοινωνική γνώση. Από την άλλη μεριά η Νέα Κοινωνιολογία της Γνώσης που είναι θεμελιωμένη στις φαινομενολογικές προσεγγίσεις και στις αναστοχαστικές όψεις της ερμηνευτικής σχολής βασίζεται στην παραδοχή μιας κοινωνικά κατασκευασμένης πραγματικότητας που οικοδομείται μέσα από τη νοηματοδότησης του κόσμου της καθημερινής ζωής.
Design of mechanically enhanced concrete using hemp shiv
Creators: name: Amziane, S.
name: Nozahic, V.
name: Sonebi, M.
Publisher: name: Academic Journal of Civil Engineering
Year: 2015

description: Hemp shiv ultra lightweight concretes are more and more used in European countries for their coupled insulation, mechanical and transfer properties. One of the scientific limitations of this material is related to the weakness of the interface zone between woody particles and mineral binder. A new way of approach to address the problem is the use of cellulose ether (CE) as an additive in order to explore to the potential of the improvement of the interface zone of between hemp shiv and binder. Two mixes were tested without CE and with 1%CE. An experimental work was carried out to investigate the binder’s properties like the paste water retention or interstitial water surface tension and viscosity. The influence of CE addition on the interface between hemp shiv and hardened binder was investigated using a Secondary scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDX) were also conducted on selected surfaces. Two hemp shiv concrete mixes with a dry density of 490 (kg/m3) are tested. Bidirectional compression and thermal conductivity tests were carried out at 60 days. The effect of particles’ orientation during manual casting was also studied. The results of SEM observations and EDX analysis showed that the transition zone contained the calcium ions (Ca2+) and had a porous thickness around hemp shiv of 200 µm. This transition zone is not visible when CE is added to the binder. As a result, the young modulus of hemp shiv concrete is increased by 2.5 to 5 times and compressive stress (ε=5%) by approximately 2.5 times, no matter the direction of compression loading. The thermal conductivity values in both directions of the aggregates were different. The results also underlined the interest of the angle parallelepiped aggregates during the compression loading direction, which affected to enhance hemp concrete rigidity.
description: Academic Journal of Civil Engineering, Vol 33 No 2 (2015): Special Issue - ICBBM 2015
Learning-to-Rank at the Speed of Sampling: Plackett-Luce Gradient Estimation With Minimal Computational Complexity
Creators: name: Oosterhuis, Harrie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Plackett-Luce gradient estimation enables the optimization of stochastic ranking models within feasible time constraints through sampling techniques. Unfortunately, the computational complexity of existing methods does not scale well with the length of the rankings, i.e. the ranking cutoff, nor with the item collection size. In this paper, we introduce the novel PL-Rank-3 algorithm that performs unbiased gradient estimation with a computational complexity comparable to the best sorting algorithms. As a result, our novel learning-to-rank method is applicable in any scenario where standard sorting is feasible in reasonable time. Our experimental results indicate large gains in the time required for optimization, without any loss in performance. For the field, our contribution could potentially allow state-of-the-art learning-to-rank methods to be applied to much larger scales than previously feasible.
description: SIGIR 2022
title: ‘I enjoy teaching by writing’: experiences of Kenyan secondary school English textbook authors
Creators: name: Kiai, Alicia
Publisher: name: IARTEM e-journal
Year: 2014

description: This paper examines secondary school English textbook authors’ experiences in Kenya, where English is an official language and the main language of education. Textbook authorship is presented as a production process. Production, one of five processes within the Circuit of Culture (Gray 2007), helps make meaning of the textbook as a cultural artefact. Through interviews, authors indicated that their textbook authorship experiences had involved them in research and planning, drafting and moderation, team-building efforts, informal trialling and, later, opportunities to write different types of teaching and learning materials. Among the challenges they experienced were bonding, syllabus interpretation, meeting deadlines, matching content to learner level, work-life balance, negotiating royalties, copyright issues and access to/handling of consumer feedback. The author concludes that the national curriculum development body, together with publishers and authors, ought to jointly address these various challenges, and thereby improve the overall process of textbook development.
description: IARTEM e-journal, Vol. 6 No. 3 (2014)
title: Η ελληνική πόλη από τον Ιππόδαμο στον Κλεάνθη
title: ΠΟΛΕΟΔΟΜΙΚΗ ΚΑΙ ΑΡΧΙΤΕΚΤΟΝΙΚΗ ΕΠΙΣΚΟΠΗΣΗ
titleType: AlternativeTitle
Creators: name: Monioudi-Gavala, Theodora
Publisher: name: Kallipos, Open Academic Editions
Year: 2016
Subjects: ΠΟΛΗ
ΕΛΛΑΔΑ ΠΟΛΕΟΔΟΜΙΑ ΑΡΧΙΤΕΚΤΟΝΙΚΗ
ΔΙΑΤΗΡΗΣΗ ΙΣΤΟΡΙΚΩΝ ΣΥΝΟΛΩΝ
City Greece Urban Planning Architecture
Conservation Of Historic Sites

description: Το βιβλίο "Η ΕΛΛΗΝΙΚΗ ΠΟΛΗ ΑΠΟ ΤΟΝ ΙΠΠΟΔΑΜΟ ΣΤΟΝ ΚΛΕΑΝΘΗ" περιλαμβάνει αυτοτελή δοκίμια που αναφέρονται στην αρχιτεκτονική και πολεοδομία της ελληνικής πόλης από το μακρινό μέχρι το εγγύτερο παρελθόν - από την κλασική αρχαιότητα στον 19ο αιώνα. Γίνονται τομές σε χαρακτηριστικές περιόδους της ιστορίας της ελληνικής πόλης, με χρονική αλληλουχία. Επιχειρείται η θεματική διεύρυνση σε ζητήματα πέραν της αρχιτεκτονικής και πολεοδομίας, όπως αυτά της πρόσληψης και διαχείρισης των μνημείων και οικιστικών συνόλων του παρελθόντος μέσα στα σύγχρονα αστικά τοπία. Γίνεται η ιστορική προσέγγιση των πόλεων στη συγχρονία και τη διαχρονία τους. Στόχος της μελέτης δεν είναι μόνο η καταγραφή των σχετικών ζητημάτων αλλά και η ερμηνεία τους: προσπαθεί να εξηγήσει πώς εξελίχθηκαν οι αλλαγές στο χώρο των πόλεων, εξετάζοντας το χώρο της πόλης μέσα στο ευρύτερο ιστορικό του περιβάλλον. Η πολεοδομία και αρχιτεκτονική εντάσσονται στον γενικότερο προβληματισμό που θέτουν οι ιστορικές συνθήκες. Αποτελούν ένα κέντρο εστίασης της κοινωνίας την οποία παρατηρούν. Η αμφίδρομη κίνηση μεταξύ χώρου και κοινωνίας καθοδηγεί τις περιγραφές και τις ερμηνείες.
Using Collocated Vision and Tactile Sensors for Visual Servoing and Localization
Creators: name: Chaudhury, Arkadeep Narayan
name: Man, Timothy
name: Yuan, Wenzhen
name: Atkeson, Christopher G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Coordinating proximity and tactile imaging by collocating cameras with tactile sensors can 1) provide useful information before contact such as object pose estimates and visually servo a robot to a target with reduced occlusion and higher resolution compared to head-mounted or external depth cameras, 2) simplify the contact point and pose estimation problems and help tactile sensing avoid erroneous matches when a surface does not have significant texture or has repetitive texture with many possible matches, and 3) use tactile imaging to further refine contact point and object pose estimation. We demonstrate our results with objects that have more surface texture than most objects in standard manipulation datasets. We learn that optic flow needs to be integrated over a substantial amount of camera travel to be useful in predicting movement direction. Most importantly, we also learn that state of the art vision algorithms do not do a good job localizing tactile images on object models, unless a reasonable prior can be provided from collocated cameras.
description: This archival version of the manuscript is significantly different in content from the reviewed and published version. The published version can be accessed here: https://ieeexplore.ieee.org/document/9699405. Supplementary materials can be accessed here: https://arkadeepnc.github.io/projects/collocated_vision_touch/index.html
A genome-wide survey of the secondary metabolite biosynthesis genes in the wheat pathogen Parastagonospora nodorum
Creators: name: Yit-Heng Chooi
name: Muria-Gonzalez, Mariano Jordi
name: Solomon, Peter S.
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: 60506 Virology
subject: FOS: Biological sciences
subject: Plant Biology
subject: Biological Sciences
subject: Ecology
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Genetics
subject: Microbiology

description: The model pathogen Parastagonospora nodorum is a necrotroph and the causal agent of the wheat disease Septoria nodorum blotch (SNB). The sequenced P. nodorum genome has revealed that the fungus harbours a large number of secondary metabolite genes. Secondary metabolites are known to play important roles in the virulence of plant pathogens, but limited knowledge is available about the SM repertoire of this wheat pathogen. Here, we review the secondary metabolites that have been isolated from P. nodorum and related species of the same genus and provide an in-depth genome-wide overview of the secondary metabolite gene clusters encoded in the P. nodorum genome. The secondary metabolite gene survey reveals that P. nodorum is capable of producing a diverse range of small molecules and exciting prospects exist for discovery of novel virulence factors and bioactive molecules.
Hypergraph Contrastive Collaborative Filtering
Creators: name: Xia, Lianghao
name: Huang, Chao
name: Xu, Yong
name: Zhao, Jiashu
name: Yin, Dawei
name: Huang, Jimmy Xiangji
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Collaborative Filtering (CF) has emerged as fundamental paradigms for parameterizing users and items into latent representation space, with their correlative patterns from interaction data. Among various CF techniques, the development of GNN-based recommender systems, e.g., PinSage and LightGCN, has offered the state-of-the-art performance. However, two key challenges have not been well explored in existing solutions: i) The over-smoothing effect with deeper graph-based CF architecture, may cause the indistinguishable user representations and degradation of recommendation results. ii) The supervision signals (i.e., user-item interactions) are usually scarce and skewed distributed in reality, which limits the representation power of CF paradigms. To tackle these challenges, we propose a new self-supervised recommendation framework Hypergraph Contrastive Collaborative Filtering (HCCF) to jointly capture local and global collaborative relations with a hypergraph-enhanced cross-view contrastive learning architecture. In particular, the designed hypergraph structure learning enhances the discrimination ability of GNN-based CF paradigm, so as to comprehensively capture the complex high-order dependencies among users. Additionally, our HCCF model effectively integrates the hypergraph structure encoding with self-supervised learning to reinforce the representation quality of recommender systems, based on the hypergraph-enhanced self-discrimination. Extensive experiments on three benchmark datasets demonstrate the superiority of our model over various state-of-the-art recommendation methods, and the robustness against sparse user interaction data. Our model implementation codes are available at https://github.com/akaxlh/HCCF.
description: This paper has been published as a full paper at SIGIR 2022
Deformation microstructures of olivine and pyroxene in mantle xenoliths in Shanwang, eastern China, near the convergent plate margin, and implications for seismic anisotropy
Creators: name: Park, Yong
name: Haemyeong Jung
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Science Policy
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Physiology
subject: Physics

description: Deformation microstructures, including lattice-preferred orientations (LPOs) of olivine, enstatite, and diopside, in mantle xenoliths at Shanwang, eastern China, were studied to understand the deformation mechanism and seismic anisotropy of the upper mantle. The Shanwang is located across the Tan-Lu fault zone, which was formed due to the collision between the Sino-Korean and South China cratons. All samples are spinel lherzolites and wehrlites, and LPOs of minerals were determined using scanning electron microscope/electron backscattered diffraction. We found two types of olivine LPO: type-B in spinel lherzolites and type-E in wehrlites. Enstatite showed two types of LPO (types BC and AC), and diopside showed four different types of LPO. Observations of strong LPOs and numerous dislocations in olivine suggest that samples showing both type-B and -E LPOs were deformed in dislocation creep. The seismic anisotropy of the P-wave was in the range of 2.2–11.6% for olivine, 1.2–2.3% for enstatite, and 2.1–6.4% for diopside. The maximum seismic anisotropy of the shear wave was in the range 1.93–7.53% for olivine, 1.53–2.46% for enstatite, and 1.81–6.57% for diopside. Furthermore, the thickness of the anisotropic layer was calculated for four geodynamic models to understand the origin of seismic anisotropy under the study area by using delay time from shear wave splitting, and S-wave velocity and anisotropy from mineral LPOs. We suggest that the seismic anisotropy under the study area can be most likely explained by two deformation modes that might have occurred at different times: one of deformed lherzolites with a type-B olivine LPO by lateral shear during/after the period of the Mesozoic continental collision between the Sino-Korean and South China cratons; and the other deformed the wehrlites with a type-E olivine LPO by horizontal extension during the period of change in absolute plate motion in relation to the westward-subducting Pacific plate.