cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analysis of label noise in graph-based semi-supervised learning
Creators: name: Afonso, Bruno Klaus de Aquino
name: Berton, Lilian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In machine learning, one must acquire labels to help supervise a model that will be able to generalize to unseen data. However, the labeling process can be tedious, long, costly, and error-prone. It is often the case that most of our data is unlabeled. Semi-supervised learning (SSL) alleviates that by making strong assumptions about the relation between the labels and the input data distribution. This paradigm has been successful in practice, but most SSL algorithms end up fully trusting the few available labels. In real life, both humans and automated systems are prone to mistakes; it is essential that our algorithms are able to work with labels that are both few and also unreliable. Our work aims to perform an extensive empirical evaluation of existing graph-based semi-supervised algorithms, like Gaussian Fields and Harmonic Functions, Local and Global Consistency, Laplacian Eigenmaps, Graph Transduction Through Alternating Minimization. To do that, we compare the accuracy of classifiers while varying the amount of labeled data and label noise for many different samples. Our results show that, if the dataset is consistent with SSL assumptions, we are able to detect the noisiest instances, although this gets harder when the number of available labels decreases. Also, the Laplacian Eigenmaps algorithm performed better than label propagation when the data came from high-dimensional clusters.
Representations of the Complex Classical Cayley-Klein Categories
Creators: name: Moskaliuk, S. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 20J15

description: Complex classical Cayley-Klein categories ${\bf A({\bj})}$, ${\bf B({\bj})}$, ${\bf C({\bj})}$ and ${\bf D({\bj})}$ are constructed by the method of categorical extension of the complex classical Cayley-Klein groups $SL(2n;{\bj};{\Bbb C}), SO(2n+1;{\bj};{\Bbb C}), Sp(2n;{\bj};{\Bbb C})$ and $SO(2n;{\bj};{\Bbb C})$, respectively. The explicit construction of the irreducible representations of the complex classical Cayley-Klein categories is received. Completeness of lists of the irreducible representations of the complex classical Cayley-Klein categories and the classification theorems are proved.
description: 58 pages, LaTex, no figures
Bagrus bayad
Creators: name: Ademola, Babatunde Taofik
name: Yakubu, Fadila Yusuf
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Siluriformes
Bagridae
Bagrus
Bagrus bayad

description: Results
Size distribution of Bagrus bayad in Zobe reservoir: The total lengths of 126 samples of Bagrus fish obtained in this study ranged from 12.0 to 55.0 cm, and the total weights ranged between 16.9 and 1260.0 g, with a mean total length and weight of 20.43± 6.45 cm and 109.23±175.05 g, respectively (Table 1). Of the 126 Bagrus samples obtained from Zobe reservoir, 110 (87.30%) contained food items in their stomachs. The proportion of stomach fullness across the various size classes of Bagrus in this study showed that a full stomach was not recorded among young Bagrus (Table 1). Additionally, empty stomachs were also the highest among this group (36.5%). Adult Bagrus with empty stomachs had the least proportion in the sample obtained from Zobe Dam during this study.
Stomach contents
The important food items of B. bayad in Zobe reservoir were fish eggs, annelids, insects, bivalves, crustaceans, teleosts, and debris (Table 2). The gut content of Bagrus in Zobe reservoir showed a considerable variation in the diet based on fish size. Insects had the highest percentage frequency (26%) among the young Bagrus (Table 2). The percent frequency of occurrence was highest for crustaceans (28%) in the juvenile Bagrus, while in the adult Bagrus, the frequency of occurrence was highest for teleost fishes (46%) among the food items. Invertebrate groups dominate the gut content of young and juvenile Bagrus, with a cumulative percentage numerical abundance of 50.7% and 57.8%, respectively. In addition, debris was found mainly in the stomachs of young Bagrus, accounting for a percentage numerical abundance of 31%. Whereas, teleost fish had the highest numerical abundance in the adult Bagrus stomach content, with a value of 53%. Crustacean had the highest IRI among all food items in young (15.9%) and juvenile (10.89%) Bagrus in Zobe reservoir during this study. While teleost fish had a higher IRI in adult food items with a value of 77.46, Amphipods were well selected among the crustaceans by young and juvenile Bagrus, while adult Bagrus selected tilapia in Zobe Dam.
description: Published as part of Ademola, Babatunde Taofik & Yakubu, Fadila Yusuf, 2024, Ontogeny and stomach content analysis of Bagrus bayad (Forskal, 1977) in Zobe reservoir, Katsina, Nigeria, pp. 46-50 in International Journal of Fisheries and Aquatic Studies 12 (1) on pages 47-48, DOI: 10.22271/fish.2024.v12.i1a.2890, http://zenodo.org/record/12550241
User requirements and DAFNE+ architecture (final report)
Creators: name: Leligou, Helen C. (Nelly)
name: Skias, Dimitrios
name: Anastasopoulos, Despina
name: Vinet, Hugues
name: Bosco, Ferdinando
name: Konstantinidis, Dimitrios
name: Dimitropoulos, Kosmas
name: Trevisan, Olga
name: Moreno, Francisco
name: Melissari, Filisia
name: Orfanoudaki, Anastasia
Publisher: name: Zenodo
Year: 2025

description: This deliverable presents a) the revised list of user requirements (based on the feedback and discussion that have taken place up to November 2024) b) the accordingly revised list of system requirements and c) the final DAFNE+ architecture that meets these revised requirements. The evolutions of the specifications were fed by feedback gathered from target users as they tested/used the platform (up to version 2), and by progress on the various dimensions of the project – technical (updated tools), legal, monetisation, DAO/ governance and evaluation. These specifications define the framework and strategy for the commercial exploitation of the DAFNE+ outcomes.
Affine Poisson Groups and WZW Model
Creators: name: Klimcik, Ctirad
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We give a detailed description of a dynamical system which enjoys a Poisson-Lie symmetry with two non-isomorphic dual groups. The system is obtained by taking the $q\to\infty$ limit of the q-deformed WZW model and the understanding of its symmetry structure results in uncovering an interesting duality of its exchange relations.
description: This is a contribution to the Proc. of the Seventh International Conference ''Symmetry in Nonlinear Mathematical Physics'' (June 24-30, 2007, Kyiv, Ukraine), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Αξιολόγηση πιστότητας μετρήσεων χαρακτηριστικών στοματικής υγείας σε άτομα με υλικές οδοντοστοιχίες
Creators: name: Μαστρογεωργοπούλου, Χριστίνα Σπυρίδωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Ποιότητα ζωής
Ολικές οδοντοιστοιχίες
Ohip-14
Αξιολόγηση δείκτη
Quality of life
Complete dentures
Oral health impact profile-14
Validation

description: Εγκυρες πηγές προτείνοθν το ανθρωποκεντρικό μοντέλο σχεδίασης ολικών οδοντοστοιχιών που παρέχει ισορροπία ανάμεσα στις ανάγκες του ασθενή και στις βιολογικές εξατομικευμένες απαιτήσεις του εξασφαλίζοντας καλύτερη ποιότητα ζωής. Η στοματική υγεία ολικά νωδών ατόμων σε λειτουργικό, ψυχοσωματικό και σωματικό επείπεδο έχει αξιολογηθεί σε σχέση με τις οδοντοστοιχίες με ειδικές κλίμακες όπως η OHIP (Oral Health Impact Profile) και η συντομευμένη έκδοσή της OHIP-14, οι οποίες επιτρέπουν έμμεσα και την εκτίμηση της ποιότητας ζωής. Στην παρούσα μελέτη έγινε αξιολόγηση του ερωτηματολογίου OHIP-14 σε δείγμα Ελλήνων, ολικά νωδών με ολικές οδοντοστοιχίες. Τα αποτελέσματα έδειξαν ότι η κλίμακα OHIP-14 αποτέλεσε αξιόπιστη μέτρηση της στοματικής υγείας και κατ' επέκταση της ποιότητας ζωής τους. Συσχετίστηκε η αθροιστική τιμή της κλίμακας με ποιοτικά χαρακτηριστικά των συμμετεχόντων όπως η ηλικία, το φύλο, το μορφωτικό επίπεδο, και ο χρόνος νωδότητας και των οδοντοστοιχιών όπως η ηλικία τους και ο τρόπος χρήσης τους. Τα χαρακτηριστικά της κλίμακας (εσωτερική συνέπεια, εγκυρότητα δομής, ομοιογένεια απαντήσεων) έδειξαν παρόμοιες τάσεις με τα αντίστοιχα αποτελέσματα μελετών από τη διεθνή βιβλιογραφία. Απαιτείται περαιτέρω μελέτη σε μεγαλύτερο δείγμα συμμετεχόντων για επικύρωση των αποτελεσμάτων
description: Current trends in research showed that the patient driven model of treatment provides balance between normative and perceived need and a better quality of life for dental patinets. Oral health measures such as OHIP and the short version OHIP-14 have been successfully evaluated as outcome measures for quality of life for denture wearers. In a group of 82 greek denture wearers OHIP-14 scale was evalutated as an outcome measure of oral health and consequently quality of life. Results showed that OHIP-14 scale was reliable, valid and that homogenous responses were provided. Total scales of the rating OHIP-14 scalre were related with participants and dentures characteristics. Statistically significant differences were revealed (between sum score and quality factors) similar with other studies such as gender, age of participants and denture use (years). Further sutdy is recommended for validation of the OHIP-14 scale as successful as oral health and quality of life OMS applied in denture wearers
The Coincidence Problem and Interacting Holographic Dark Energy
Creators: name: Karwan, Khamphee
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the dynamical behaviour of the interacting holographic dark energy model whose interaction term is $Q=3H(\lam_dρ_d + \lam_cρ_c)$, where $ρ_d$ and $ρ_c$ are the energy density of dark energy and CDM respectively. To satisfy the observational constraints from SNIa, CMB shift parameter and BAO measurement, if $\lam_c = \lam_d$ or $\lam_d, \lam_c >0$, the cosmic evolution will only reach the attractor in the future and the ratio $ρ_c/ρ_d$ cannot be slowly varying at present. Since the cosmic attractor can be reached in the future even when the present values of the cosmological parameters do not satisfy the observational constraints, the coincidence problem is not really alleviated in this case. However, if $\lam_c \neq \lam_d$ and they are allowed to be negative, the ratio $ρ_c/ρ_d$ can be slowly varying at present and the cosmic attractor can be reached near the present epoch. Hence, the alleviation of the coincidence problem is attainable in this case. The alleviation of coincidence problem in this case is still attainable when confronting this model to SDSS data.
description: 16 pages, 5 figures; revised version to appear in JCAP; references added
Study of the Distribution of Frequencies of Alleles and Genotypes of Polymorphic Variants rs1800795 of the IL6 Gene, rs1800629 of the TNFA Gene and rs10490770 of the LZTFL1 Gene Associated with COVID-19 in Populations of the Volga-Ural Region
Creators: name: Z.R. Sufyanova
name: N.V. Ekomasova
name: M.A. Dzhaubermezov
name: S.G. Petrova
name: A.V. Kazantseva
name: D.S. Prokofyeva
name: L.R. Gabidullina
name: I.M. Khidiyatova
name: A.Kh. Nurgalieva
name: Y.Y. Fedorova
name: E.K. Khusnutdinova
Publisher: name: Opera Medica et Physiologica
Year: 2024
Subjects: COVID-19
IL-6
TNFA
LZTFL1
populations of the Volga-Ural region

description: The study of the severity and consequences of infectious diseases is a relevant subject of research throughout the world, which was directly demonstrated by the situation with the 2020-2023 coronavirus pandemic. In our study, we analyzed a distribution of genotypes and alleles frequency of polymorphic variants of the IL6 rs1800795, TNFA rs1800629 and LZTFL1 rs10490770 gene polymorphisms, which were previously linked to the pathogenesis of COVID19, in populations of Burzyan Bashkirs, Sterlibashevsky Bashkirs, Permsky Bashkirs, Kazan Tatars, Chuvash, Udmurts, Mari, Komi and Mordvins. Statistically significant differences were identified in the IL6 rs1800795 between the populations of the Burzyan Bashkirs and the Mari and Komi (p < 0.05). The Sterlibashevsky Bashkirs, Permsky Bashkirs and Udmurts also statistically significantly differed from the Komi population (p < 0.05). When studying the TNFA rs1800629, statistically significant differences were identified between the populations of Sterlibashevsky and Permsky Bashkirs and the Udmurts population (p < 0.05). Analysis of the LZTFL1 rs10490770 revealed statistically significant differences only between the Udmurt and Mari populations (p < 0.05). The data indicate that despite the geographic proximity of the examined populations of the Volga-Ural region, they were able to preserve the uniqueness of their gene pool.
On the pumping of the CS($v=0$) masers in W51 e2e
Creators: name: van der Walt, D. J.
name: Ginsburg, A.
name: Goddi, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of numerically solving the rate equations for the first 31 rotational states of CS in the ground vibrational state to determine the conditions under which the J=1-0, J=2-1 and J=3-2 transitions are inverted to produce maser emission. The essence of our results is that the CS($v=0$) masers are collisionally pumped and that, depending on the spectral energy distribution, dust emission can suppress the masers. Apart from the J=1-0 and J=2-1 masers the calculations also show that the J=3-2 transition can be inverted to produce maser emission. It is found that beaming is necessary to explain the observed brightness temperatures of the recently discovered CS masers in W51 e2e. The model calculations suggest that a CS abundance of a few times $10^{-5}$ and CS($v=0$) column densities of the order $10^{16}\,\mathrm{cm^{-2}}$ are required for these masers. The rarity of the CS masers in high mass star forming regions might be the result of a required high CS abundance as well as due to attenuation of the maser emission inside as well as outside of the hot core.
description: 13 pages, 15 figures
Ball-and-stick models of the toluene molecule
Creators: name: Chen, Junjie
Publisher: name: figshare
Year: 2022
Subjects: subject: Computational Chemistry
subject: Crystallography
subject: 30301 Chemical Characterisation of Materials
subject: FOS: Chemical sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: 30606 Structural Chemistry and Spectroscopy
subject: 30307 Theory and Design of Materials

description: Toluene is an aromatic hydrocarbon used extensively as starting material for the manufacture of industrial chemicals. Pure toluene is a colourless, flammable, toxic liquid, insoluble in water but soluble in all common organic solvents. Its chemical formula is that of methylbenzene. It is a mono-substituted benzene derivative, consisting of a methyl group attached to a phenyl group. Toluene is predominantly used as an industrial feedstock and a solvent. Toluene reacts as a normal aromatic hydrocarbon in electrophilic aromatic substitution. Because the methyl group has greater electron-releasing properties than a hydrogen atom in the same position, toluene is more reactive than benzene toward electrophiles. Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China
A quantum long time energy red shift: a contribution to varying $α$ theories
Creators: name: Urbanowski, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: By analyzing the survival probability amplitude of an unstable state we show that the energy corrections to this state in the long ($t \to \infty$) and relatively short (lifetime of the state) time regions, are different. It is shown that in the considered model the above corrections decrease to zero as $t \to \infty$. It is hypothesized that this property could be detected by analyzing the spectra of distant astrophysical objects. The above property of unstable states may influence the measured values of possible deviations of the fine structure constant $α$ as well as other astrophysical and cosmological parameters.
description: LaTeX2e, 16 pages, new comments added
Study of the Synchronization and the Transmission of Gating Modulation in the Single Potassium Channel
Creators: name: M.E. Astashev
name: A.A. Grinevich
name: D.A. Serov
name: A.V. Simakin
name: V.A. Yusim
name: A.V. Tankanag
Publisher: name: Opera Medica et Physiologica
Year: 2024
Subjects: amplitude-frequency analysis
phase wavelet coherence
correlation analysis
bispectral analysis
potassium channels
single channel patch-voltage-clamp

description: The transition of the ion channel between the open and closed states is traditionally considered random. Current experimental data indicated the presence of oscillatory modes of regulation of open/closed states, and possible connections between these modes. The canonical methods Fourier or wavelet transforms, fractal analysis and mathematical modelling can evaluate open/closed states oscillatory modes, but cannot describe their relationship to each other. We first applied the method of bispectral analysis to solve this problem. The well-described potassium channels potential-dependent Kv, calcium-dependent KCa and the modelled potassium channel KcsA were studied. The relationship between fluctuations open/closed lifetimes at frequencies ~0.1, ~1 and ~10 Hz was shown. These frequencies correspond to rhythmic processes in cardiovascular and nervous systems functioning, including those regulated by potassium channels. The normalised integrated bispectrum index was chosen to quantitatively evaluate the interrelation of ion channel opening/closing states. The normalised bispectrum index notable increased upon alteration of the membrane potential from 0 to 20 mV. The obtained data expand our understanding of ion channel functioning principles and can be used in the search for new approaches to the pathological states (channelopathies) therapy.
New technique for replica symmetry breaking with application to the SK-model at and near T=0
Creators: name: Schmidt, Manuel J.
name: Oppermann, Reinhold
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We describe a novel method which allows the treatment of high orders of replica-symmetry-breaking (RSB) at low temperatures as well as at T=0 directly, without a need for approximations or scaling assumptions. It yields the low temperature order function q(a,T) in the full range $0\leq a
The Nature of Changes in mRNA Expression and the Relative Con-tent of Selenoproteins in a Mouse Model with TAA-Induced Fi-brosis and Hepatocellular Carcinoma (HCC)
Creators: name: E.G. Varlamova
name: E.A. Turovsky
Publisher: name: Opera Medica et Physiologica
Year: 2024
Subjects: selenoproteins
liver fibrosis
hepatocellular carcinoma

description: This work is devoted to the study of mRNA expression patterns and the relative content of selenoproteins in mice with TAA-induced liver fibrosis and TAA-induced HCC. The main objective of this study is to evaluate the activation or suppression of selenoprotein synthesis during HCC progression and directly in the tumor in one TAA-treated mouse model, which is a pilot study and allows us to closely approximate the situation observed during HCC progression in vivo. It was found that as HCC progresses, there is an increase in the mRNA expression of thioredoxin reductases TXNRD1 and TXNRD2, deiodinase DIO3, glutathione peroxidases GPX1, GPX2, GPX4, and an inverse correlation in the expression of mRNA was characteristic of GPX3. In addition, the mRNA expression of endoplasmic reticulum resident selenoproteins: SELENOM, SELENON, SELENOT and SELENOS changed significantly. Also, in tumor liver samples and directly in the tumor itself, an increase in the expression of the selenoprotein SELENOP was recorded. The information obtained from the results of this work will significantly complement the existing data on the role of mammalian selenoproteins in various liver pathologies and in oncogenesis in general.
The Influence of Risk Factors on Immediate Results of Open Revascularization in Acute Thrombosis of Peripheral Arteries in Patients with Acute COVID-19 Infection
Creators: name: A.V. Nikolsky
name: V.N. Kravchuk
name: N.A. Trofimov
name: D.V. Volkov
name: A.V. Garkavtsev
name: A.Y. Kosonogov
name: K.A. Kosonogov
name: V.V. Yarygin
name: V.A. Grishin
Publisher: name: Opera Medica et Physiologica
Year: 2024
Subjects: COVID-19
acute lower limb ischemia
revascularization
open surgery

description: Introduction. Acute limb ischemia is a critical condition requiring immediate revascularization. The risk of complications is affected by age, coronary heart disease, chronic kidney disease, respiratory failure, diabetes mellitus, thrombosis etiology, urgency and duration of surgery. The aim of the study was to evaluate the influence of the presented risk factors on the results of open revascularization for acute thrombosis in patients with acute COVID-19. Materials and methods. The results of open surgical treatment of acute limb ischemia of Rutherford class II in patients with acute COVID-19 (86 patients, group I) and 50 patients without COVID-19 (group II) were analyzed. Results. In-hospital mortality was 73.2% in group I and 12% in group II. Most deaths in group I were due to early rethrombosis. Risk factors coronary heart disease, chronic kidney disease, diabetes mellitus, age >75 years had a greater negative impact in group I against the background of coronavirus infection. Conclusion. In patients in the acute stage of COVID-19, open revascularization is associated with a higher risk of complications and mortality in the early postoperative period relative to patients who underwent surgery without coronavirus infection. The impact of all the identified risk factors increases against the background of COVID-19, a statistically significant increase in the odds ratio of developing postoperative complications was found for such perioperative risk factors as: coronary heart disease, respiratory failure, polyvalent etiology of thrombosis and age over 75 years, among the intraoperative factors, the emergency nature of the operation and the duration of the surgical intervention are significant.
Synthesis, anticancer activity, docking and computational studies of new pyridyl-glycosyl hybrids and acyclic analogs
Creators: name: El-Bayaa, Mohamed N
name: Kotb, Eman R
name: Messaoudi, Sabri
name: Awad, Hanem M
name: Saleh, Mahmoud G
name: Soliman, Hanan A
Publisher: name: Taylor & Francis
Year: 2024
Subjects: Biochemistry
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Cancer
Hematology

description: New pyridine-O-glycosides and their acyclic nucleoside analogues were prepared by heterocyclization and glycosylation. The anticancer activity against HCT-116, HepG2 and MCF-7 human cancer cells and BJ-1 cell revealed that the galacto- and xylopyranosyl glycosides possessing 4-bromophenyl have superior cytotoxic activities against HepG2 cell while glycosides 7–9 resulted in superior cytotoxic activities regarding MCF-7 breast cell. In case of HCT-116 colorectal carcinoma cells, two products and the derived glycosides and acyclic analogues showed potent activities. The most potent compounds were investigated for their possible binding affinities to the active site of CDK2 enzyme via in silico molecular docking simulation in addition to computational studies. The results support the antiproliferative effect and elucidate the interactions of 3a and 8 with catalytic sites. New pyridine-O-glycosides and their acyclic nucleoside analogues were prepared by heterocyclization and glycosylation. The anticancer activity tested against HCT-116, HepG2, MCF-7 human cancer cells and BJ-1 cell. Glycosides compounds 7–9 have superior cytotoxic activities against MCF-7 breast cancer cell. Compounds 3a, 8 were investigated for their possible binding affinities to the active site of CDK2 enzyme via in silico molecular docking simulation in addition to computational studies. The results support the antiproliferative effect and elucidate the interactions of 3a and 8 with catalytic sites.
Μικροβιολογική ποιότητα του νερού των οδοντιατρικών μονάδων στην Οδοντιατρική Σχολή του ΑΠΘ
Creators: name: Αράβα, Μαρία Στεργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Μικροβιακή μόλυνση νερού Οδοντιατρική μονάδα
Βιοϋμένιο
Water contamination
Dental unit waterlines
Biofilm

description: Το πρόβλημα της μικροβιακής μόλυνσης του νερού της οδοντιατρικής μονάδας απασχολεί έντονα τον ιατρικό κόσμο. Κύρια αιτία μόλυνσης είναι ο αποικισμός του συστήματος τροφοδότησης με μικροοργανισμούς με αποτέλεσμα τον σχηματισμό ενός βιοϋμένα που τροφοδοτεί συνεχώς το νερό με μικρόβια μολύνοντάς το σε επίπεδα ανώτερα από τα επιτρεπτά. Ο σκοπός της παρούσας εργασίας είναι να εξετάσει από μικροβιολογιακή άποψη την καταλληλότητα του νερού των μηχανημάτων της Οδοντιατρικής Σχολής του ΑΠΘ. Για το λόγο αυτό, δείγματα νερού ελήφθησαν από την τροφοδοσία του ποτηριού, την υδροσύριγγα και τη χειρολαβή υψηλών ταχυτήτων αρχικά πριν από την έναρξη των εργασιών και σε δεύτερη φάση πριν την έναρξη και μετά τη λήξη των εργασιών. Ποσότητα του νερού ενοφθαλμίστηκε σε κατάλληλο καλλιεργητικό υπόστρωμα και μετά το τέλος της επώασης υπολογίστηκε ο αριθμός των μικροβίων ανα ml δείγματος νερού. Τα αποτελέσματα αποκαλύπτουν την παρουσία μεγάλου αριθμού μικροβίων στο νερό των μηχανημάτων. Βρέθηκε στατιστικά σημαντική διαφορά στον αριθμό των μικροβίων μεταξύ ποτηριού και υδροσύριγγας και μεταξύ ποτηριού και χειρολαβής, όπως και στα επίπεδα μόλυνσης του ποτηριού μεταξύ καινούριων και παλιών μηχανημάτων. Αντίθετα, τα επίπεδα μόλυνσης φαίνεται να είναι ανεξάρτητα από το βαθμό χρήσης του νερού και τη στιγμή λήψης του δείγματος
description: The microbial contamination of dental unit waterlines is a problem which has preoccupied the medical community intensely. The major cause of this phenomenon is the formation of a biofilm within the tubing which constantly supplies the water with microorganisms. The aim of this study is to investigate, from a microbiological aspect, the water quality of the dental units in the School of Dentistry of Aristotle University of Thessaloniki. For this reason, water samples were collected from the triple syringe, the high speed outlet and the cup filler, at the beginning of the work day before the dental units were used and then after the end of the work day. The samples were plated on to agar media (Yeast Extract Agar) and the number of colony forming units (CFU) per ml of water sample was determined. The results reveal the presence of a great number of microorganisms in the dental unit waterlines. There is a statistically significant difference between the number of microorganisms found in the water of the cup filler and number of microorganisms found in the water of the triple syringe and also between the number of microorganisms found in the water of cup filler and the number of microorganisms found in the water of the high speed outlet. Moreover, there is a statistically significant difference in the water contamination of the cup filler between old and newly installed dental units. On the contrary, the contamination levels seem to be independent from the extent of the water use and the moment of sampling
The Role of MTHFR and MTRR Gene Polymorphisms in the Development of Cholelithiasis
Creators: name: Yu.Yu. Fedorova
name: A.Kh. Nurgalieva
name: S.G. Petrova
name: R.R. Murzina
name: M.A. Dzhaubermezov
name: N.V. Ekomasova
name: E.K. Khusnutdinova
name: D.S. Prokofieva
Publisher: name: Opera Medica et Physiologica
Year: 2024
Subjects: cholelithiasis
polymorphic variant
gene
methylenetetrahydrofolate reductase
methionine synthase reductase

description: Сholelithiasis is a multifactorial process that is influenced by both environmental and genetic factors. Some evidence suggests that total plasma homocysteine correlates with the presence of gallstones, suggesting that hyperhomocysteinemia is a risk factor for cholelithiasis. The aim of this work was to analyze the association of polymorphic variants of the methylenetetrahydrofolate reductase MTHFR (rs1801133 (677C > T), rs1801131 (1298A > C)) and methionine synthase reductase MTRR (rs1801394 (66A > G)) genes with the development of gallstone disease in individuals from the Republic of Bashkortostan. DNA samples from 196 patients with cholelithiasis and 274 healthy individuals aged 23-87 years living in the Republic of Bashkortostan were used as research material. Genotyping was performed using the real-time PCR method. It has been established that the rs1801133*T allele and the rs1801133*TT genotype of the MTHFR gene are markers of an increased risk of developing cholelithiasis. An association was established between the rs1801133*TT genotype of the rs1801133 polymorphic variant of the MTHFR gene and the moderate severity of cholelithiasis and hereditary burden in patients with cholelithiasis. A study of the polymorphic variant of the MTRR gene revealed that the rs1801394*G allele increases the risk of cholelithiasis. Analysis of associations of the polymorphism rs1801131 of the MTHFR gene with the development of cholelithiasis did not reveal statistically signif-icant differences between the compared groups of patients and controls. Determination of homocysteine levels and genetic testing of MTHFR and MTRR polymorphisms in patients with cholelithiasis may be useful in clinical practice.
Ανάλυση των βάσεων δεδομένων των γενετικών και σωματικών μεταλλάξεων του γονιδίου p53. Συσχέτιση με πιθανούς μηχανισμούς μεθυλίωσης και μεταλλαξιγένεσης
Creators: name: Κυβεντίδης, Αναστάσιος Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Μεθυλίωση DNA
Μεταλλάξεις p53
Μηχανισμοί μεθυλίωσης
Γενετικές μεταλλάξεις P53
Σωματικές μεταλλάξεις p53
Μηχανισμοί μεταλλάξεων του DNA
DNA methylation
p53 mutations
methylation mechanisms
p53 germline mutations
p53 somatic mutations
DNA mutation mechanisms

description: Στην παρούσα εργασία έγινε ανάλυση των γενετικών και σωματικών βάσεων μεταλλάξεων του ογκοκατασταλτικού γονιδίου p53 που βρίσκονται στο διαδίκτυο. Η ανάλυση πραγματοποιήθηκε με τη βοήθεια των προγραμμάτων Microsoft Excel και iMARS με παράλληλη στατιστική επεξεργασία των αποτελεσμάτων. Αναλύθηκε η μεταλλαξιμότητα της αλληλουχίας του P53 ανά κωδίκιο, ανα δινουκλεοτίδιο και ανά νουκλεοτίδιο. Εγινε προσπάθεια ερμηνείας των αποτελεσμάτων σε σχέση με τη μεθυλίωση του γονιδίου και τη διαμόρφωση της δίκλωνης έλικας του DNA. Τα παραπάνω οδήγησαν στη διατύπωση καινούργιων θεωριών για τους μηχανισμούς μεθυλίωσης και μετάλλαξης του γονιδίου p53
description: In this essay, the germline and somatic mutations data bases of tumor suppressor gene p53 were analyzed. The data bases can be found in the internet. The analysis was performed with the help of computer programms Microsoft Excel and iMars. The results were statistically analyzed, as well. The mutagenesis of the p53 sequence was analyzed per codon, per dinucleotide and per nucleotide. Efford was made to interpret the results in correlation with DNA methylation and DNA double stranded helix conformation. The results above led to the development of new theories about methylation and mutation mechanisms of gene p53
The variational approximation for two-dimensional quantum droplets
Creators: name: Otajonov, Sherzod R.
name: Tsoy, Eduard N.
name: Abdullaev, Fatkhulla Kh.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The dynamics of a two-dimensional Bose-Einstein condensate in a presence of quantum fluctuations is studied. The properties of localized density distributions, quantum droplets (QDs), are analyzed by means of the variational approach. It is demonstrated that the super-Gaussian function gives a good approximation for profiles of fundamental QDs and droplets with non-zero vorticity. The dynamical equations for parameters of QDs are obtained. Fixed points of these equations determine the parameters of stationary QDs. The period of small oscillations of QDs near the stationary state is estimated. It is obtained that periodic modulations of the strength of quantum fluctuations can actuate different processes, including resonance oscillations of the QD parameters, an emission of waves and a splitting of QDs into smaller droplets.
description: 7 pages, 7 figures. Phys. Rev. E, accepted (2020)
Schönig, Werner / L'Hoest, Raphael (Hrsg.), Sozialstaat wohin?
Creators: name: Zademach, Wieland
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 47 Nr. 3 (1998): Ökumenische Rundschau, Band 47, Heft 3
Μυελοδυσπλαστικά σύνδρομα, νεότερα δεδομένα :: αναδρομική, παθολογική και κλινική ανάλυση των περιστατικών των τελευταίων ετών της Β' παθολογικής κλινικής Ιπποκρατείου Νοσοκομείου Ιατρικής Σχολής ΑΠΘ
Creators: name: Διαμαντίδης, Μιχαήλ Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Μυελοδυπσλαστκά σύνδρομα (ΜΔΣ)
FAB ταξινόμηση
WHO ταξινόμηση
Σύστημα IPSS
Απόπτωση και ΜΔΣ σύνδρομα
Myelodysplastic syndromes
FAB classification
WHO classification
International prognostic scoring system
Apoptosis and MDS syndromes

description: Σκοπός της εργασίας αυτής είναι η καταγραφή όλων των μυελοδυσπλαστικών συνδρόμων του αρχείου της Β΄ παθολογικής κλινικής του ΑΠΘ (Ιπποκράτειο Νοσοκομείο Θεσσαλονίκης) από τις αρχές της δεκαετίας του 1990 μέχρι σήμερα. Εγινε αναδρομική μελέτη των φακέλων των ασθενών, στατιστική επεξεργασία των αποτελεσμάτων, καθώς και η σύγκρισή τους με τα αποτελέσματα παρόμοιων ερευνών σε διεθνές επίπεδο για την ανεύρεση ομοιοτήτων και διαφορών. Η παρούσα μελέτη απέδειξε : 1. ότι υπαρχουν στατιστικώνς σημαντικές διαφορές στη συνολική επιβίωση των ασθενών ανάμεσα σε επιμέρους ομάδες 2. ότι προέκυψε στατιστικώς σημαντική διαφορά στο συνολικό χρονικό διάστημα ως την εκτροπή σε ΟΜΛ στη σύγκριση των επιμέρους ομάδων και 3. ότι παράγοντες που σχετίζονται στατιστικώς σημαντικά με τη λευχαιμική μετάπτωση των ΜΔΣ συνδρόμων είναι το : ποσοστό βλαστών στο μυελό των οστών > 5%, η εμφάνιση πανκυτταροπενίας στο περιφερικό αίμα (3 σειρές), οι κατηγορίες RAEB kai RAEB-T κατά FAB, καθώς επίσης και η χαμηλότερη των 72 ετών ηλικία των ασθενών. Συμπερασματικά η παρούσα μελέτη εμφανίζει τόσο ομοιότητες όσο και διαφορές με τις αντίστοιχες μελέτες των ευρωπαϊκών και ασιατικών χωρών
description: The aim of the following diploma assignment is to record all the myelodysplastic syndromes of the files of the Second Pathological Clinic of the Aristotle University of Thessaloniki (Hippocrates Hospital of Thessaloniki) from the early 1990s until today. the patients files were studied retrospectively, the results were statistically elaborated and they were compared with the results of similar studies at an international level for finding similarities and differences. The present study proved : that there are statistically important differences to the overall survival of the patients between individual groups 2. that there is statistically significant difference to the total time from diagnosis until leukaemic transformation when individual groups were compared 3. that risk factors which are related statistically important withe leukaemic transformation of MDS and raise the possibility of evolution of MDS to AML are : the percentagle of bone marrow blasts >5%, the appearance of pancytopenia in the peripheral blood (3 lines) the groups of RAEB and RAEB-T according to FAB and also, the age of patients less than 72 years old.In conclusion the present study includes similarities as well as differences, in comparison to similar studies from european and asiatic countries.
High resolution observations of a starburst at z=0.223: resolved CO(1-0)
Creators: name: Combes, F.
name: Garcia-Burillo, S.
name: Braine, J.
name: Schinnerer, E.
name: Walter, F.
name: Colina, L.
name: Gerin, M.
name: --
name: LERMA
name: Obs-Paris
name: Madrid, OAN-
name: Obs-Bordeaux
name: MPIA-Heidelberg
name: CSIC-Madrid
name: ENS-Paris
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of CO(1-0) emission mapping with the IRAM interferometer, at \sim 1 arcsec, resolution, of the z=0.223 ultra-luminous starburst IRAS 11582+3020. This galaxy was selected from an IRAM-30m survey of 30 galaxies at moderate redshift (z \sim 0.2-0.6) to explore galaxy evolution and in particular the star formation efficiency, in the redshift range filling the gap between local and very high-z objects. The CO emission is kinematically resolved, and about 50% of the total emission found in the 27 arcsec (97 kpc) single dish beam is not recovered by the interferometer. This indicates that some extended emission may be present on large scales (typically 7-15 arcsec). The FIR-to-CO luminosity ratio follows the trend between local and high-z ultra-luminous starbursts.
description: 4 pages, 5 figures, accepted A&A Letters, extended-PdB special issue
Η στάση και η συμπεριφορά των ελλήνων αναγνωστών απέναντι στα online περιοδικά
Creators: name: Πάσσιου, Ασπασία
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: on line περιοδικά
αναγνώστες
on line magazines
readership
readers

description: Η εργασία έχει σκοπό να προσδιορίσει τη στάση του αναγνωστικού κοινού απέναντι στα online περιοδικά και συγκεκριμένα να καταδείξει αν τα προτιμούν έναντι των παραδοσιακών εντύπων, αν έχουν την ίδια ικανοποίηση από τις δυο μορφές περιοδικών, τι τους ενθαρρύνει και τι τους αποτρέπει στην επιλογή κάποιας από τις δύο μορφές που ήδη έχουν κάνει σε όφελος της άλλης, ποια είναι εκείνα τα στοιχεία που παραμένουν αξεπέραστα στον ανταγωνισμό μεταξύ online και τυπωμένων περιοδικών. Προκειμένου να απαντηθούν τα παρακάτω διερευνήθηκε η διεθνής βιβλιογραφία, συντάχτηκε ερωτηματολόγιο και έγινε προωτογενής έρευνα και στατιστική επεξεργασία των δεδομένων
description: The paper intents to identify the behavior of the greek readership towards on line magazines and specifically : if the readers prefer the online magazines of the printed ones, if they have the same satisfaction of the two forms of magazines what push them or not to the online magazines, what are the advantages and disadvantages of each of the two forms of magazines. In order to answear these questions, a questionnaire was distributed and the international literature helped the research statistical data, also included
Constructing Integrable Lindblad Superoperators
Creators: name: de Leeuw, Marius
name: Paletta, Chiara
name: Pozsgay, Balázs
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We develop a new method for the construction of one-dimensional integrable Lindblad systems, which describe quantum many body models in contact with a Markovian environment. We find several new models with interesting features, such as annihilation-diffusion processes, a mixture of coherent and classical particle propagation, and a rectified steady state current. We also find new ways to represent known classical integrable stochastic equations by integrable Lindblad operators. Our method can be extended to various other situations and it establishes a structured approach to the study of solvable open quantum systems.
description: 11 pages
Large Time-dependent CP Violation in B_s^0 System and Finite D^0-D^0bar Mass Difference in Four Generation Standard Mode
Creators: name: Hou, Wei-Shu
name: Nagashima, Makiko
name: Soddu, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Combining the measured B_s mixing with b \to s\ell^+\ell^- rate data, we find a sizable 4 generation t' quark effect is allowed, for example with m_{t'} \sim 300 GeV and V_{t's}^*V_{t'b} \sim 0.025 e^{\pm i 70^\circ}, which could underly the new physics indications in CP violation studies of b \to s qbar q transitions. With positive phase, large and negative mixing-dependent CP violation in B_s system is predicted, \sin 2Φ_{B_s} \sim -0.5 to -0.7. This can also be probed via width difference methods. As a corollary, the short distance generated D^0-D^0bar mass difference is found to be consistent with, if not slightly higher than, recent B factory measurements, while CP violation is subdued with \sin 2Φ_D \sim -0.2.
description: 5 pages, 3 figures added (to total of 11 figures), revision to clarify b -> s photon contrast with Bs and D mixing
Understanding school effectiveness and english language certification in the third world : an ethnographic study of some Nigerian secondary schools
Creators: name: Adewuyi, David Aderemi
Publisher: name: University of British Columbia
Year: 2009

description: The main purpose of this study was to identify, describe, and explain the school effectiveness characteristics that might influence English language certification in selected secondary schools in a Third World country, Nigeria. Ethnographic methods of participant observation, interviews, questionnaires, camera and video recordings, and documentary analysis were used to study six secondary schools in urban, sub-urban, and rural settings. The study was conducted in response to the call for the contextualization of School Effectiveness Research (SER). One incontrovertible conclusion in School Effectiveness Research (SER) is that the accumulation of evidence on the characteristics of school effectiveness has not answered the perplexing question of why certain characteristics work in one school and not in others. Many researchers have suggested contextualizing SER as one way of dealing with this nagging problem. The contextualization of SER, argued these researchers, would ensure that local school and classroom cultures were taken into consideration in the design, implementation, and interpretation of School Effectiveness Research. Studying the nuances of local school cultures might illuminate the relationships between school effectiveness characteristics and the classroom instructional strategies employed by effective teachers to enhance student academic achievement. Results from the six case studies indicated support for many school effectiveness characteristics that have been attested to in the literature, such as strong and purposeful school leadership, clear and articulated goals, high expectations of student achievement, a safe and orderly environment conducive to learning, and frequent evaluation of students' progress. But some characteristics that might be peculiar to the Third World were also unraveled by the study. For instance, extramural lessons seemed to be an important feature in certain schools that achieved effective examination results but lacked effectiveness characteristics. There appears also to be a link between the identified school level effectiveness characteristics and the classroom level instructional strategies employed by effective teachers in English language classrooms. The study of the dimensions of effective instruction in Nigerian English language classrooms yielded some "language examination-oriented instructional strategies" that were different from the "mediational instructional strategies" used by effective language teachers in Californian classrooms in the United States of America. It was felt that these differences were a result of contextual differences in the two developed and developing world domains.
Lexical and grammatical elicitation: Various
Creators: name: Gómez, María
name: Michael, Lev
name: Bossi, Madeline
name: Dabkowski, Maksymilian
name: Drummond, Emily
name: Jarvis, Rebecca
name: Khuu, Phuong
name: Russell, Katherine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: gug

description: Lexical elicitation: body parts, animal terms, features of the natural world, manufactured objects, and human-related terms. Grammatical elicitation: possessive constructions and simple sentences with intransitive and transitive verbs.
Deep learning-based classification of fine hand movements from low frequency EEG
Creators: name: Bressan, Giulia
name: Wriessnegger, Selina C.
name: Cisotto, Giulia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: The classification of different fine hand movements from EEG signals represents a relevant research challenge, e.g., in brain-computer interface applications for motor rehabilitation. Here, we analyzed two different datasets where fine hand movements (touch, grasp, palmar and lateral grasp) were performed in a self-paced modality. We trained and tested a newly proposed convolutional neural network (CNN), and we compared its classification performance into respect to two well-established machine learning models, namely, a shrinked-LDA and a Random Forest. Compared to previous literature, we took advantage of the knowledge of the neuroscience field, and we trained our CNN model on the so-called Movement Related Cortical Potentials (MRCPs)s. They are EEG amplitude modulations at low frequencies, i.e., (0.3, 3) Hz, that have been proved to encode several properties of the movements, e.g., type of grasp, force level and speed. We showed that CNN achieved good performance in both datasets and they were similar or superior to the baseline models. Also, compared to the baseline, our CNN requires a lighter and faster pre-processing procedure, paving the way for its possible use in an online modality, e.g., for many brain-computer interface applications.
A Tropical Toolkit
Creators: name: Katz, Eric
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14A15

description: We give an introduction to Tropical Geometry and prove some results in Tropical Intersection Theory. The first part of this paper is an introduction to tropical geometry aimed at researchers in Algebraic Geometry from the point of view of degenerations of varieties using projective not-necessarily-normal toric varieties. The second part is a foundational account of tropical intersection theory with proofs of some new theorems relating it to classical intersection theory. Revised version includes many corrections, more examples, and improved exposition.
description: 38 pages