cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Physicochemical analyses of a bioactive 4-aminoantipyrine analogue - synthesis, crystal structure, solid state interactions, antibacterial, conformational and docking studies
Creators: name: Alam, Mohammad Sayed
name: Lee, Dong-Ung
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: 4-Aminoantipyrine
subject: crystal structure
subject: molecular interactions
subject: antibacterial
subject: docking
subject: 610

description: A novel Schiff base derivative of 4-aminoantipyrine, that is, (E)-4-(2-methoxybenzylideneamino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (MBA-dMPP), was synthesized and characterized by FT-IR, 1H-NMR, and EI-MS. Single-crystal X-ray diffraction data revealed MBA-dMPP adopts a trans configuration around its central C=N double bond, and forms orthorhombic crystals. XRD revealed that MBA-dMPP possess two different planes, in which the pyrazolone and benzylidene groups attached to C9 of the pyrazolone ring are almost coplanar and the phenyl ring connected to the N1 atom of the pyrazolone moiety lies in another plane. The intermolecular, host-guest C-H…O, C-H…N, and C-H…C van der Waals interactions were found to form a 3D network and confer stability to the MBA-dMPP crystal structure. The quantitative and qualitative solid state behaviors of MBA-dMPP were subjected to 3D Hirshfeld surface analysis and 2D fingerprint plotting. Reciprocal H…H contacts contributed most (52.9 %) to the Hirshfeld surface, followed by C…H/H…C contacts (30.2 %), whereas, O…H/H…O and N…H/H…N interactions contributed 15.5 % to the Hirshfeld surface. Electrostatic potentials were mapped over the Hirshfeld surface to analyze electrostatic complementarities within the MBA-dMPP crystal. In addition, geometrical descriptors were also analyzed to the extent of surface interactions. MBA-dMPP was also investigated for in vitro antibacterial activity against Gram-positive and Gram-negative bacterial strains, and showed highest activity against Bacillus cereus (MIC = 12.5 mg mL -1) and Salmonella tythimurium (MIC = 50 mg mL-1). In silico screening was conducted by docking MBA-dMPP on the active site of S12 bacterial protein (an important therapeutic target of antibacterial agents) and its binding properties were compared with those of ciprofloxacin. Moreover, a field points map of MBA-dMPP ligand was studied to determine electrostatic and van der Waals forces, hydrophobic potentials, and positions involved in ligand-receptor interactions. Finally, the torsion energies of crystal structure and optimized and bioactive conformers of MBA-dMPP were compared to predict its bioactive conformation.
description: EXCLI Journal;Vol. 15, 2016
Super-exceptional embedding construction of the heterotic M5: Emergence of SU(2)-flavor sector
Creators: name: Fiorenza, Domenico
name: Sati, Hisham
name: Schreiber, Urs
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A new super-exceptional embedding construction of the heterotic M5-brane's sigma-model was recently shown to produce, at leading order in the super-exceptional vielbein components, the super-Nambu-Goto (Green-Schwarz-type) Lagrangian for the embedding fields plus the Perry-Schwarz Lagrangian for the free abelian self-dual higher gauge field. Beyond that, further fields and interactions emerge in the model, arising from probe M2- and probe M5-brane wrapping modes. Here we classify the full super-exceptional field content and work out some of its characteristic interactions from the rich super-exceptional Lagrangian of the model. We show that SU(2)xU(1)-valued scalar and vector fields emerge from probe M2- and M5-branes wrapping the vanishing cycle in the A_1-type singularity; together with a pair of spinor fields of U(1)-hypercharge +-1 and each transforming as SU(2) iso-doublets. Then we highlight the appearance of a WZW-type term in the super-exceptional PS-Lagrangian and find that on the electromagnetic field it gives the first-order non-linear DBI-correction, while on the iso-vector scalar field it has the form characteristic of the coupling of vector mesons to pions via the Skyrme baryon current. We discuss how this is suggestive of a form of SU(2)-flavor chiral hadrodynamics emerging on the single (N=1) M5 brane, different from, but akin to, holographic large-$N$ QCD.
description: 38 pages
Από τον Πλάτωνα και τον Θουκυδίδη στον Μακιαβέλι: ζητήματα ισχύος και ηθικές προεκτάσεις του φαινομένου της ηγεσίας
Creators: name: Μάντη, Ελένη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ηγεσία
subject: Θεωρητικές προσεγγίσεις
subject: Ηθική
subject: Αρετές
subject: Μάνατζμεντ
subject: Θεωρία χαρακτήρα
subject: Θεωρία χαρακτηριστικών
subject: Χαρισματική ηγεσία
subject: Μαξ Βέμπερ
subject: Θουκυδίδης
subject: Μακιαβέλι
subject: Πλάτωνας
subject: Σουν Τσου
subject: Στρατηγική ηγεσία
subject: Ηθικά διλήμματα
subject: Συνεπειοκρατία
subject: Αποτελεσματικότητα
subject: Δεοντοκρατία
subject: Σκληρή ισχύς
subject: Ήπια ισχύς
subject: Οικονομική ισχύς
subject: Στρατιωτική ισχύς
subject: Έξυπνη ισχύς
subject: Κυβερνο-ισχύς
subject: Κρίση
subject: Διαμάχες
subject: Λήψη αποφάσεων

description: Σκοπός της παρούσας διατριβής είναι να παρουσιάσει μια θεωρητική προσέγγιση του φαινομένου της ηγεσίας και να εξηγήσει τις πολυάριθμες και εξελισσόμενες θεωρίες περί αυτής. Αρχικά, γίνεται μια προσπάθεια να τεθεί ένα συγκεκριμένο εννοιολογικό πλαίσιο, ώστε να αναλυθούν μετέπειτα οι τρέχουσες τάσεις στη σύγχρονη έρευνα. Στη συνέχεια, θίγεται ο αντικειμενικός σκοπός, οι στόχοι και οι ευθύνες της ηγεσίας, αλλά και ποιοι παράγοντες επιδρούν στην ενάσκηση των καθηκόντων του ηγέτη. Επιπλέον, γίνεται μια ιστορική ανασκόπηση προκειμένου να εξεταστεί το φαινόμενο της ηγεσίας έτσι όπως το ορίζουν σπουδαίοι διανοητές στα έργα τους και αναλύεται η επίδραση της ηθικής κατά τη διαδικασία λήψης αποφάσεων. Αναλύονται ακόμη, οι πολύπλευρες έννοιες της ισχύος σε συνάρτηση με το φαινόμενο της ηγεσίας. Τέλος, η εργασία πραγματεύεται τη θέση και την αντίδραση της ηγεσίας απέναντι σε ενδεχόμενο κρίσης, αλλά και τους τρόπους αντιμετώπισης αυτής.
Outer entropy = Bartnik-Bray inner mass, and the gravitational ant conjecture
Creators: name: Wang, Jinzhao
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Entropy and energy are found to be closely tied on our quest for quantum gravity. We point out an interesting connection between the recently proposed outer entropy, a coarse-grained entropy defined for a compact spacetime domain motivated by the holographic duality, and the Bartnik-Bray quasilocal mass long known in the mathematics community. In both scenarios, one seeks an optimal spacetime fill-in of a given closed, connected, spacelike, codimension-two boundary. We show that for an outer-minimizing mean-convex surface, the Bartnik-Bray inner mass matches exactly with the irreducible mass corresponding to the outer entropy. The equivalence implies that the area laws derived from the outer entropy are mathematically equivalent as the monotonicity property of the quasilocal mass. It also gives rise to new bounds between entropy and the gravitational energy, which naturally gives the gravitational counterpart to Wall's ant conjecture. We also observe that the equality can be achieved in a conformal flow of metrics, which is structurally similar to the Ceyhan-Faulkner proof of the ant conjecture. We compute the small sphere limit of the outer entropy and it is proportional to the bulk stress tensor as one would expect for a quasilocal mass. Lastly, we discuss some implications of taking quantum matter into consideration in the semiclassical setting.
description: 35 pages, 2 figures. Comments are welcome
Diffusive scaling and the high-energy limit of deep inelastic scattering in QCD at large N_c
Creators: name: Hatta, Y.
name: Iancu, E.
name: Marquet, C.
name: Soyez, G.
name: Triantafyllopoulos, D. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the limits of the large-N_c approximation (with N_c the number of colors), we establish the high-energy behaviour of the diffractive and inclusive cross-sections for deep inelastic scattering at fixed impact parameter. We demonstrate that for sufficiently high energies and up to very large values of Q^2, well above the proton average saturation momentum , the cross-sections are dominated by dense fluctuations in the target wavefunction, that is, by the relatively rare gluon configurations which are at saturation on the resolution scale Q^2 of the virtual photon. This has important physical consequences, like the emergence of a new, diffusive, scaling, which replaces the `geometric scaling' property characteristic of the mean field approximation. To establish this, we shall rely on a dipole version of the Good-Walker formula for diffraction (that we shall derive here in the context of DIS), together with the high-energy estimates for the dipole scattering amplitudes which follow from the recently established evolution equations with Pomeron loops and include the relevant fluctuations. We also find that, as a consequence of fluctuations, the diffractive cross-section at high energy is dominated by the elastic scattering of the quark-antiquark component of the virtual photon, up to relatively large virtualities Q^2 >> .
description: 69 pages, 20 figures
Different anti-adipogenic effects of bio-compounds on primary visceral pre-adipocytes and adipocytes
Creators: name: Colitti, Monica
name: Stefanon, Bruno
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: natural compounds
subject: apoptosis
subject: differentiation
subject: lipolysis
subject: visceral adipocytes
subject: 610

description: Several natural compounds exhibit strong capacity for decreasing triglyceride accumulation, enhancing lipolysis and inducing apoptosis. The present study reports the anti-adipogenic effects of Silybum marianum (SL), Citrus aurantium (CA), Taraxacum officinale (TO), resveratrol (RE), Curcuma longa (CU), caffeine (CF), oleuropein (OL) and docosahexaenoic acid (DHA) in reducing differentiation and increasing lipolysis and apoptosis. Analyses were performed on human primary visceral pre-adipocytes after 10 (P10) and 20 (P20) days of treatment during differentiation and on mature adipocytes after 7 days of treatment (A7). The percentage of apoptosis induced by TO extract in P10 and P20 cells was significantly higher than that induced by all other compounds and in CTRL cells. Triglyceride accumulation was significantly lower in cells treated with DHA, CF, RE in comparison to cells treated with OL and in CTRL cells. Treatments with CF, DHA and OL significantly incremented lipolysis in P20 cells in comparison to other compounds and in CTRL cells. On the contrary, the treatment of A7 cells with OL, CA and TO compounds significantly increased cell lipolysis. The addition of CF in differentiating P20 pre-adipocytes significantly increased the expression of genes involved in inhibition of adipogenesis, such as GATA2, GATA3, WNT1, WNT3A, SFRP5, and DLK1. Genes involved in promoting adipogenesis such as CCND1, CEBPB and SREBF1 were significantly down-regulated by the treatment. The screening of bioactive compounds for anti-adipogenic effects showed that in differentiating cells TO extract was the most effective in inducing apoptosis and CF and DHA extracts were more efficient in inhibition of differentiation and in induction of cell lipolysis.
description: EXCLI Journal;Vol. 15, 2016
Explicit solution for a network control problem in the large deviation regime
Creators: name: Atar, Rami
name: Dupuis, Paul
name: Shwartz, Adam
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 60F10, 60K25; Secondary 49N70, 93E20

description: We consider optimal control of a stochastic network,where service is controlled to prevent buffer overflow. We use a risk-sensitive escape time criterion, which in comparison to the ordinary escape time criteria heavily penalizes exits which occur on short time intervals. A limit as the buffer sizes tend to infinity is considered. In [2] we showed that, for a large class of networks, the limit of the normalized cost agrees with the value function of a differential game. The game's value is characterized in [2] as the unique solution to a Hamilton-Jacobi-Bellman Partial Differential Equation (PDE). In the current paper we apply this general theory to the important case of a network of queues in tandem. Our main results are: (i) the construction of an explicit solution to the corresponding PDE, and (ii) drawing out the implications for optimal risk-sensitive and robust regulation of the network. In particular, the following general principle can be extracted. To avoid buffer overflow there is a natural competition between two tendencies. One may choose to serve a particular queue, since that will help prevent its own buffer from overflowing, or one may prefer to stop service, with the goal of preventing overflow of buffers further down the line. The solution to the PDE indicates the optimal choice between these two, specifying the parts of the state space where each queue must be served (so as not to lose optimality), and where it can idle.
Green ship recycling
Creators: name: Κέππας, Ηλίας
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Green ship recycling
subject: Ανακύκλωση πλοίων
subject: Διάλυση πλοίων

description: Η παρούσα διπλωματική εργασία πραγματεύεται το μείζονος σημασίας θέμα της πράσινης ανακύκλωσης πλοίων και των οφελών που δύναται να αποκομίσει η κοινωνία, το περιβάλλον και εν γένει ο ναυτιλιακός κλάδος από την εφαρμογή της εν λόγω μεθόδου διάλυσης. Τα τελευταία χρόνια, ο κλάδος της διάλυσης πλοίων έχει έρθει αντιμέτωπος με την ανάγκη ανεύρεσης εναλλακτικών μεθόδων αποσυναρμολόγησης με απώτερο σκοπό την προστασία του περιβάλλοντος, όπως επίσης και των εργαζομένων σε αυτή τη βιομηχανία. Σκοπός, λοιπόν, της εργασίας είναι να παρουσιαστεί το πλαίσιο στο οποίο λειτουργούν τα διαλυτήρια ανά τον κόσμο αυτή τη στιγμή και να προτείνει μεθόδους διάλυσης, οι οποίες εναρμονίζονται με τους διεθνείς κανονισμούς και ταυτόχρονα προσβλέπουν στην προστασία του περιβάλλοντος και των εργαζομένων.
First Measurements of eta_c Decaying into K^+K^-2(pi^+pi^-) and 3(pi^+pi^-)
Creators: name: BES Collaboration
name: Ablikim, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The decays of eta_c to K^+K^-2(pi^+pi^-) and 3(pi^+pi^-) are observed for the first time using a sample of 5.8X10^7 J/ψevents collected by the BESII detector. The product branching fractions are determined to be B(J/ψ-->gamma eta_c)*B(eta_c-->K^+K^-pi^+pi^-pi^+pi^-)=(1.21+-0.32+- 0.23)X10^{-4}$,B(J/ψ-->gamma eta_c)*B(eta_c-->K^{*0}\bar{K}^{*0}pi^+pi^-)= (1.29+-0.43+-0.32)X10^{-4}$, and (J/ψ-->gamma eta_c)* B(eta_c-->pi^+pi^-pi^+pi^-pi^+pi^-)= (2.59+-0.32+-0.48)X10^{-4}. The upper limit for eta_c-->phi pi^+pi^-pi^+pi^- is also obtained as B(J/ψ-->gamma eta_c)*B(eta_c--> phi pi^+pi^-pi^+pi^-)< 6.03 X10^{-5} at the 90% confidence level.
description: 11 pages, 4 figures
Statistical tools for a better optical model
Creators: name: Catacora-Rios, M.
name: King, G. B.
name: Lovell, A. E.
name: Nunes, F. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Background: Modern statistical tools provide the ability to compare the information content of observables and provide a path to explore which experiments would be most useful to give insight into and constrain theoretical models. Purpose: In this work we study three such tools in the context of nuclear reactions with the goal of constraining the optical potential. Method: The three statistical tools examined are: i) the principal component analysis; ii) the sensitivity analysis based on derivatives; and iii) the Bayesian evidence. We first apply these tools to a toy-model case, comparing the form of the imaginary part of the optical potential. Then we consider two different reaction observables, elastic angular distributions and polarization data for reactions on 48Ca at two different beam energies. Results: For the toy-model case, we find significant discrimination power in the sensitivities and the Bayesian evidence, showing clearly that the volume imaginary term is more useful to describe scattering at higher energies. When comparing between elastic cross sections and polarization data using realistic optical models, sensitivity studies indicate that both observables are roughly equally sensitive but the variability of the optical model parameters is strongly angle dependent. The Bayesian evidence shows some variability between the two observables, but the Bayes factor obtained is not sufficient to discriminate between angular distributions and polarization. Conclusions: From the cases considered, we conclude that in general elastic scattering angular distributions have similar impact in constraining the optical potential parameters compared to the polarization data. The angular ranges for the optimum experimental constraints can vary significantly with the observable considered.
Polyhydroxylated fullerene nanoparticles attenuate brain infarction and oxidative stress in rat model of ischemic stroke
Creators: name: Rasouli Vani, Javad
name: Mohammadi, Mohammad Taghi
name: Sarami Foroshani, Mahsa Sarami
name: Jafari, Mahvash
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: Ischemic stroke
subject: oxidative damage
subject: nitrosative damage
subject: fullerene nanoparticles
subject: 610

description: Oxidative stress is the common underlying mechanism of damage in ischemic stroke. Therefore, we aimed to evaluate the possible protective effects of polyhydroxylated fullerene derivatives on brain infarction and oxidative/nitrosative stress in a rat model of ischemic stroke. The experiment was performed by four groups of rats (each; n=12); Sham, Control ischemia, and ischemic treatment groups (Pretreatment and Posttreatment). Brain ischemia was induced by 90 min middle cerebral artery occlusion (MCAO) followed by 24 hours reperfusion. Rats received fullerene nanoparticles at dose of 1 mg/kg 30 min before MCAO and immediately after beginning of reperfusion. Infarct volume, contents of malondialdehyde (MDA), glutathione (GSH) and nitrate as well as superoxide dismutase (SOD) activity were assessed 24 hours after termination of MCAO. Brain infarct volume was 310 ± 21 mm3 in control group. Administration of fullerene nanoparticles before and after MCAO significantly decreased the infarct volume by 53 % (145 ± 45 mm3) and 81 % (59 ± 13 mm3), respectively. Ischemia also enhanced MDA and nitrate contents of ischemic hemispheres by 45 % and 25 % , respectively. Fullerene nanoparticles considerably reduced the MDA and nitrate contents of ischemic hemispheres before MCAO by 58 % and 17 % , respectively, and after MCAO by 38 % and 21 % , respectively. Induction of MCAO significantly decreased GSH content (19 % ) and SOD activity (52 % ) of ischemic hemispheres, whereas fullerene nanoparticles increased the GSH content and SOD activity of ischemic hemispheres by 19 % and 52 % before MCAO, respectively, and 21 % and 55 % after MCAO, respectively. Our findings indicate that fullerene nanoparticles, as a potent scavenger of free radicals, protect the brain cells against ischemia/reperfusion injury and inhibit brain oxidative/nitrosative damage.
description: EXCLI Journal;Vol. 15, 2016
Conversion between electron spin and microscopic atomic rotation
Creators: name: Hamada, Masato
name: Murakami, Shuichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We theoretically investigate the microscopic mechanism of conversion between the electron spin and the microscopic local rotation of atoms in crystals. In phonon modes with angular momenta, the atoms microscopically rotate around their equilibrium positions in crystals. In a simple toy model with phonons, we calculate the spin expectation value by using the adiabatic series expansion. We show that the time-averaged spin magnetization is generated by the microscopic local rotation of atoms via the spin-orbit interaction. On the other hand, in the system with a simple vibration of atoms, time-averaged spin magnetization becomes zero due to the time-reversal symmetry. Moreover, the magnitude of the time-averaged spin magnetization depends on the inverse of the difference of instantaneous eigenenergy, and we show that it becomes smaller in band insulators with a larger gap.
description: 11 pages, 7 figures, to be published in Phys. Rev. Research
On some classes of Lindelöf Sigma-spaces
Creators: name: Kubis, Wieslaw
name: Okunev, Oleg
name: Szeptycki, Paul J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54D20, 54A25, 54C60, 54F99

description: We consider special subclasses of the class of Lindelöf Sigma-spaces obtained by imposing restrictions on the weight of the elements of compact covers that admit countable networks: A space $X$ is in the class $LΣ(\leqκ)$ if it admits a cover by compact subspaces of weight $κ$ and a countable network for the cover. We restrict our attention to $κ\leqω$. In the case $κ=ω$, the class includes the class of metrizably fibered spaces considered by Tkachuk, and the $P$-approximable spaces considered by Tkacenko. The case $κ=1$ corresponds to the spaces of countable network weight, but even the case $κ=2$ gives rise to a nontrivial class of spaces. The relation of known classes of compact spaces to these classes is considered. It is shown that not every Corson compact of weight $\aleph_1$ is in the class $LΣ(\leq ω)$, answering a question of Tkachuk. As well, we study whether certain compact spaces in $LΣ(\leqω)$ have dense metrizable subspaces, partially answering a question of Tkacenko. Other interesting results and examples are obtained, and we conclude the paper with a number of open questions.
description: 21 pages. to appear in Topology and its Applications
A generalized method for all-loop results in $λ$-models
Creators: name: Sagkrioti, Eftychia
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the anomalous dimension of the single current operator in the case of single and doubly deformed asymmetric $λ$-models with a general deformation matrix. Our method uses the underlying geometry of the coupling space, as well as an auxiliary group interaction, which completely decouples from the asymmetric model in a specific limit, consistent with the Renormalization Group flow. Our results are valid to all orders in the deformation parameters and leading order to the levels of the underlying current algebras. We specialize our general result to several models of particular interest that have been constructed in the literature and for which these anomalous dimensions were not known.
description: 29 pages
Rapidity dependence of Bose-Einstein correlations at SPS energies
Creators: name: Kniege, Stefan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This article is devoted to results on pion-pion -Bose-Einstein correlations in central Pb+Pb collisions measured by the NA49 experiment at the CERN SPS. Rapidity as well as transverse momentum dependences of the correlation lengths will be shown for collisions at 20A, 30A, 40A, 80A, and 158A GeV beam energy. Only a weak energy dependence of the radii is observed at SPS energies. The kt-dependence of the correlation lengths as well as the single particle mt-spectra will be compared to model calculations. The rapidity dependence is analysed in a range of 2.5 units of rapidity starting at the center of mass rapidity at each beam energy. The correlation lengths measured in the longitudinally comoving system show only a weak dependence on rapidity.
description: 7 pages, 4 figures, contribution to the Workshop on Particle Correlations and Femtoscopy, Kromeriz, August 15-17, 2005
Στρατηγικό management & ποιότητα: η περίπτωση του πολιτικού περιβάλλοντος
Creators: name: Κάντα, Δέσποινα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Στρατηγικό μάνατζμεντ
subject: Ποιότητα
subject: Πολιτική
subject: Πολιτικά κόμματα

description: Στην παρούσα διπλωματική εργασία επιχειρείται να αναλυθεί ο τρόπος με τον οποίο θα μπορούσε να αξιοποιηθεί η εμπειρία των ιδιωτικών επιχειρήσεων πάνω σε θέματα οργάνωσης, χάραξης πολιτικών και προσδιορισμό αξιών και στόχων σε συνθήκες πολιτικού κόμματος. Μέσα από τις προσεγγίσεις που έχουν αναδειχθεί, όπως αυτή της Διοίκηση Ολικής Ποιότητας, της Διοίκησης μέσω Στόχων και της Διοίκησης με το Παράδειγμα, επιχειρείται η εξέταση των κοινών σημείων πολιτικής και επιχειρήσεων-προτύπων, της δυνητικής υιοθέτησης των καλών πρακτικών που έχουν αναπτύξει οι επιχειρήσεις-πρότυπα από τα κόμματα, καθώς και η εξέταση άλλων τομέων που αφορούν την εσωτερική διοίκηση των κομμάτων και την οργάνωσή τους.
Phonon rotoelectric effect
Creators: name: Hamada, Masato
name: Murakami, Shuichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In crystals with time-reversal symmetry but without inversion symmetry, the phonon angular momentum can be generated by the temperature gradient, and it is called phonon thermal Edelstein effect. On the other hand, when both symmetries are broken and their product is conserved, the phonon angular momentum for any phonon modes at any wave vectors vanishes, and the phonon thermal Edelstein effect does not occur. In this paper, we propose another mechanism of generation of the phonon angular momentum. We show that in such crystals the electric field generates the phonon angular momentum, via the lattice distortion due to the electric field. This effect is in the same symmetry class with the magnetoelectric effect, and we call this effect phonon rotoelectric effect. We discuss the temperature dependence of the phonon angular momentum generated by the temperature gradient and by the electric field in the high- and the low-temperature limits.
description: 8 pages, 3 figures
Detection and correction of the misplacement error in THz Spectroscopy by application of singly subtractive Kramers-Kronig relations
Creators: name: Lucarini, Valerio
name: Ino, Yusuke
name: Peiponen, Kai-Erik
name: Kuwata-Gonokami, Makoto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In THz reflection spectroscopy the complex permittivity of an opaque medium is determined on the basis of the amplitude and of the phase of the reflected wave. There is usually a problem of phase error due to misplacement of the reference sample. Such experimental error brings inconsistency between phase and amplitude invoked by the causality principle. We propose a rigorous method to solve this relevant experimental problem by using an optimization method based upon singly subtractive Kramers-Kronig relations. The applicability of the method is demonstrated for measured data on an n-type undoped (100) InAs wafer in the spectral range from 0.5 up to 2.5 THz.
description: 16 pages, 5 figures
Biological and quantitative-SAR evaluations, and docking studies of (E)-N'-benzylidenebenzohydrazide analogues as potential antibacterial agents
Creators: name: Alam, Mohammad Sayed
name: Jebin, Sefat
name: Rahman, M. Mostafizur
name: Bari, Md. Latiful
name: Lee, Dong-Ung
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: Hydrazone Schiff base
subject: antimicrobial activity
subject: physicochemical properties
subject: docking study
subject: 610

description: A series of 15 (E)-N'-benzylidenebenzohydrazide analogues were evaluated for their antimicrobial activities against eleven pathogenic and food-borne microbes, namely, S. aureus (G+), L. monocytogenes (G+), B. subtilis (G+), K. pneumonia (G-), C. sakazakii (G-), C. freundii (G-), S. enterica (G-), S. enteritidis (G-), E. coli (G-), Y. pestis (G-), and P. aeruginosa (G-). Most of the compounds exhibited selective activity against some Gram-negative bacterial strains. Of the compounds tested (3a-o), 3b and 3g were most active against C. freundii (MIC = ~19 µg mL-1). Whereas, compounds 3d, 3i, 3k and 3n exhibited MIC values ranging from 37.5 to 75 µg mL-1 against C. freundii, and compounds 3e, 3l and 3n had MIC values of ~75 µg mL-1 against K. pneumonia. Quantitative structure-antibacterial activity relationships were studied using physicochemical parameters and a good correlation was found between calculated octanol-water partition coefficients (clogP; a lipophilic parameter) and antibacterial activities. In silico screening was also performed by docking high (3b and 3g) and low (3n) activity compounds on the active site of E. coli FabH receptor, which is an important therapeutic target. The findings of these in silico screening studies provide a theoretical basis for the design and synthesis of novel benzylidenebenzohydrazide analogues that inhibit bacterial FabH.
description: EXCLI Journal;Vol. 15, 2016
Rengstorf, Karl Heinrich, von Kortzfleisch, Siegfried: Kirche und Synagoge
Creators: name: Harder, Günther
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 18 Nr. 2 (1969): Ökumenische Rundschau, Band 18, Heft 2
Decentralized Multi-Agent Pursuit using Deep Reinforcement Learning
Creators: name: Souza, Cristino de
name: Newbury, Rhys
name: Cosgun, Akansel
name: Castillo, Pedro
name: Vidolov, Boris
name: Kulic, Dana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Pursuit-evasion is the problem of capturing mobile targets with one or more pursuers. We use deep reinforcement learning for pursuing an omni-directional target with multiple, homogeneous agents that are subject to unicycle kinematic constraints. We use shared experience to train a policy for a given number of pursuers that is executed independently by each agent at run-time. The training benefits from curriculum learning, a sweeping-angle ordering to locally represent neighboring agents and encouraging good formations with reward structure that combines individual and group rewards. Simulated experiments with a reactive evader and up to eight pursuers show that our learning-based approach, with non-holonomic agents, performs on par with classical algorithms with omni-directional agents, and outperforms their non-holonomic adaptations. The learned policy is successfully transferred to the real world in a proof-of-concept demonstration with three motion-constrained pursuer drones.
description: Published in RA-L and ICRA
Charge Transfer Fluctuations as a QGP Signal
Creators: name: Jeon, Sangyong
name: Shi, Lijun
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this study, we analyze the recently proposed charge transfer fluctuations within a finite pseudo-rapidity space. As the charge transfer fluctuation is a measure of the local charge correlation length, it is capable of detecting inhomogeneity in the hot and dense matter created by heavy ion collisions. We predict that going from peripheral to central collisions, the charge transfer fluctuations at midrapidity should decrease substantially while the charge transfer fluctuations at the edges of the observation window should decrease by a small amount. These are consequences of having a strongly inhomogeneous matter where the QGP component is concentrated around midrapidity. We also show how to constrain the values of the charge correlations lengths in both the hadronic phase and the QGP phase using the charge transfer fluctuations. Current manuscript is based on the preprints hep-ph/0503085 (to appear in Physical Review C) and nucl-th/0506025.
description: To appear in the proceedings of 18th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2005 (QM 2005), Budapest, Hungary, 4-9 Aug 2005
Effects of gestational and lactational exposure to low dose mercury chloride (HgCl2) on behaviour, learning and hearing thresholds in WAG/Rij rats
Creators: name: Sahin, Deniz
name: Erdolu, Cem Onur
name: Karadenizli, Sabriye
name: Kara, Ahmet
name: Bayrak, Gunce
name: Beyaz, Sumeyye
name: Demir, Buse
name: Ateş, Nurbay
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: inorganic mercury
subject: passive avoidance
subject: DPOA E test
subject: Morris watermaze
subject: hearing thresholds
subject: WAG/Rij rats
subject: 610

description: We investigated the effects of inorganic mercury exposure during gestational/lactational periods on the behaviour, learning and hearing functions in a total of 32, 5-week-old and 5-month-old WAG/Rij rats (equally divided into 4 groups as 5-week and 5-month control mercury exposure groups). We evaluated the rats in terms of locomotor activity (LA), the Morris-water-maze (MWM) test and the passive avoidance (PA) test to quantify learning and memory performance; we used distortion product otoacoustic emission (DPOAE) tests to evaluate hearing ability. There were no significant differences between the 5-week-old rat groups in LA, and we detected a significant difference (p < 0.05) in the HgCl2-treated group in PA, MWM and DPOAE tests compared with the control group. The HgCl2-treated 5-week-old group exhibited worse emotional memory performance in PA, worse spatial learning and memory performances in MWM. There were no significant differences between the groups of 5-month-old rats in LA, MWM or PA. However, the DPOAE tests worsened in the mid- and high-frequency hearing thresholds. The HgCl2-treated 5-month-old group exhibited the most hearing loss of all groups. Our results convey that mercury exposure in young rats may worsen learning and memory performances as well as hearing at high-frequency levels. While there was no statistically significant difference in the behavior and learning tests in adult rats, the DPOAE test produced poorer results. Early detection of effects of mercury exposure provides medicals team with an opportunity to determinate treatment regimens and mitigate ototoxicity. DPOAE test can be used in clinical and experimental research investigating heavy metal ototoxicity.
description: EXCLI Journal;Vol. 15, 2016
Automatic liver tumor segmentation on computed tomography for patient treatment planning and monitoring
Creators: name: Moghbel, Mehrdad
name: Mashohor, Syamsiah
name: Mahmud, Rozi
name: Saripan, M. Iqbal Bin
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: image segmentation
subject: random walker segmentation
subject: CT imaging
subject: liver tumor burden
subject: fuzzy c-means
subject: cuckoo search optimization
subject: 610

description: Segmentation of liver tumors from Computed Tomography (CT) and tumor burden analysis play an important role in the choice of therapeutic strategies for liver diseases and treatment monitoring. In this paper, a new segmentation method for liver tumors from contrast-enhanced CT imaging is proposed. As manual segmentation of tumors for liver treatment planning is both labor intensive and time-consuming, a highly accurate automatic tumor segmentation is desired. The proposed framework is fully automatic requiring no user interaction. The proposed segmentation evaluated on real-world clinical data from patients is based on a hybrid method integrating cuckoo optimization and fuzzy c-means algorithm with random walkers algorithm. The accuracy of the proposed method was validated using a clinical liver dataset containing one of the highest numbers of tumors utilized for liver tumor segmentation containing 127 tumors in total with further validation of the results by a consultant radiologist. The proposed method was able to achieve one of the highest accuracies reported in the literature for liver tumor segmentation compared to other segmentation methods with a mean overlap error of 22.78 % and dice similarity coefficient of 0.75 in 3Dircadb dataset and a mean overlap error of 15.61 % and dice similarity coefficient of 0.81 in MIDAS dataset. The proposed method was able to outperform most other tumor segmentation methods reported in the literature while representing an overlap error improvement of 6 % compared to one of the best performing automatic methods in the literature. The proposed framework was able to provide consistently accurate results considering the number of tumors and the variations in tumor contrast enhancements and tumor appearances while the tumor burden was estimated with a mean error of 0.84 % in 3Dircadb dataset.
description: EXCLI Journal;Vol. 15, 2016
The space-time symmetry group of a spin 1/2 elementary particle
Creators: name: Rivas, Martin
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The space-time symmetry group of a model of a relativistic spin 1/2 elementary particle, which satisfies Dirac's equation when quantized, is analyzed. It is shown that this group, larger than the Poincare group, also contains space-time dilations and local rotations. It has two Casimir operators, one is the spin and the other is the spin projection on the body frame. Its similarities with the standard model are discussed. If we consider this last spin observable as describing isospin, then, this Dirac particle represents a massive system of spin 1/2 and isospin 1/2. There are two possible irreducible representations of this kind of particles, a colourless or a coloured one, where the colour observable is also another spin contribution related to the zitterbewegung. It is the spin, with its twofold structure, the only intrinsic property of this Dirac elementary particle.
description: Contribution to the JINR(Dubna) SPIN05 workshop, 18 pages, 1 figure. Abstract and minor changes of sections 2 to 4
Density-functional theory study of the initial oxygen incorporation in Pd(111)
Creators: name: Todorova, Mira
name: Reuter, Karsten
name: Scheffler, Matthias
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Pd(111) has recently been shown to exhibit a propensity to form a sub-nanometer thin surface oxide film already well before a full monolayer coverage of adsorbed O atoms is reached on the surface. Aiming at an atomic-scale understanding of this finding, we study the initial oxygen incorporation into the Pd(111) surface using density-functional theory. We find that oxygen incorporation into the sub-surface region starts at essentially the same coverage as formation of the surface oxide. This implies that the role of sub-surface oxygen should be considered as that of a metastable precursor in the oxidation process of the surface. The mechanisms found to play a role towards the ensuing stabilization of an ordered oxidic structure with a mixed on-surface/sub-surface site occupation follow a clear trend over the late 4d transition metal series, as seen by comparing our data to previously published studies concerned with oxide formation at the basal surface of Ru, Rh and Ag. The formation of a linearly aligned O-TM-O trilayered structure (TM = Ru, Rh, Pd, Ag), together with an efficient coupling to the underlying substrate seem to be key ingredients in this respect.
description: 8 pages including 5 figures; related publications can be found at http://www.fhi-berlin.mpg.de/th/th.html
Grape seed powder improves renal failure of chronic kidney disease patients
Creators: name: Turki, Khaoula
name: Charradi, Kamel
name: Boukhalfa, Habib
name: Belhaj, Monia
name: Limam, Ferid
name: Aouani, Ezzedine
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: grape seed extract
subject: oxidative stress
subject: antioxidant status
subject: chronic kidney disease
subject: protection
subject: 610

description: Chronic kidney disease (CKD) is a syndrome characterized by progressive and irreversible deterioration of renal function linked to slow destruction of renal parenchyma, eventually terminating in death when sufficient number of nephrons are damaged. Oxidative stress is commonly observed in CKD patients resulting from an imbalance between overproduction of reactive oxygen species (ROS) and impairment of defence mechanisms. Grape seed extract (GSE) is a polyphenolic mixture exhibiting antioxidant and anti-inflammatory properties. We conducted an interventional pilot study of supplementation with GSE capsules (GSE group, n = 23) or placebo (control group, n = 10) on CKD patients. Blood and urine samples were collected at baseline and after a six-month-long supplementation period to determine some renal function biomarkers, as well as antioxidant, anti-inflammatory and haematological parameters. GSE improved glomerular filtration rate (GFR) and proteinuria, increased the anti-oxidant status as assessed by high plasma catalase and superoxide dismutase and also lowered lipoperoxidation and carbonylation. GSE ameliorated inflammation by decreasing CRP, triglyceridemia and counteracted anemia and thrombocytopenia. Supplementation with 2 g GSE/day for six months improved some kidney function parameters of CKD patients and this beneficial effect of GSE seems to be mediated at least partly by its antioxidant and anti-inflammatory properties.
description: EXCLI Journal;Vol. 15, 2016
Geometrothermodynamics of black holes with a nonlinear source
Creators: name: Sánchez, Alberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study thermodynamics and geometrothermodynamics of a particular black hole configuration with a nonlinear source. We use the mass as fundamental equation, from which it follows that the curvature radius must be considered as a thermodynamic variable, leading to an extended equilibrium space. Using the formalism of geometrothermodynamics, we show that the geometric properties of the thermodynamic equilibrium space can be used to obtain information about thermodynamic interaction, critical points and phase transitions. We show that these results are compatible with the results obtained from classical black hole thermodynamics.
description: 14 pages, 30 figures
Μετασχηματιστική ηγεσία και ενεργητικότητα
Creators: name: Μαντζανάς, Γρηγόριος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ενεργητικότητα
subject: Μετασχηματιστική ηγεσία
subject: Καλαθοσφαίριση
subject: NBA

description: Η θεωρία της Μετασχηματιστικής Ηγεσίας σε συνδυασμό με την ενεργητικότητα που διαθέτουν οι ηγέτες, συνθέτουν το πλέον κατάλληλο προφίλ ενός επιτυχημένου ηγέτη ο οποίος θα έχει την ικανότητα να παρακινήσει τους ακολούθους του με σκοπό το βέλτιστο δυνατό αποτέλεσμα. Σκοπός της παρούσας μελέτης αποτελεί η διερεύνηση της σχέσης μεταξύ της μετασχηματιστικής ηγεσίας και της ενεργητικότητας. Ως πεδίο ανάλυσης ορίστηκε ο χώρος της καλαθοσφαίρισης και πιο συγκεκριμένα το Αμερικάνικο Πρωτάθλημα Καλαθοσφαίρισης (ΝΒΑ). Το δείγμα αποτελείται από τους ηγέτες της κάθε ομάδας βάση των στατιστικών τους και του δείκτη αξιολόγησής τους.
Vacuum semiclassical gravity does not leave space for safe singularities
Creators: name: Arrechea, Julio
name: Barceló, Carlos
name: Boyanov, Valentin
name: Garay, Luis J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: General relativity predicts its own demise at singularities, but also appears to conveniently shield itself from the catastrophic consequences of such singularities, making them safe. For instance, if strong cosmic censorship were ultimately satisfied, spacetime singularities, although present, would not pose any practical problems to predictability. Here we argue that under semiclassical effects the situation should be rather different: the potential singularities which could appear in the theory will generically affect predictability and so one will be forced to analyse whether there is a way to regularise them. For these possible regularisations, the presence and behaviour of matter during gravitational collapse and stabilisation into new structures will play a key role. First we show that the static semiclassical counterparts to the Schwarzschild and Reissner-Nordström geometries have singularities which are no longer hidden behind horizons. Then we argue that in dynamical scenarios of formation and evaporation of black holes, we are left with only three possible outcomes which could avoid singularities and eventual predictability issues. We briefly analyse the viability of each one of them within semiclassical gravity, and discuss the expected characteristic timescales of their evolution.
description: 13 pages, 5 figures. Version accepted for publication in Universe. This article belongs to the Special Issue "Gravitational Singularities and Their Quantum Fates"
Two Models for Bolometer and Microcalorimeter Detectors with Complex Thermal Architectures
Creators: name: Appel, J. W.
name: Galeazzi, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have developed two analytical models to describe the performance of cryogenic microcalorimeters and bolometers. One of the models is suitable to describe Transition Edge Sensor (TES) detectors with an integrated absorber, the other is suitable for detectors with large absorbers. Both models take into account hot-electron decoupling and absorber decoupling. The differential equations describing these models have been solved using block diagram algebra. Each model has produced closed form solutions for the detector's responsivity, dynamic impedance, and noise equivalent power for phonon noise, Johnson noise, amplifier noise, 1/f noise, and load resistor noise.
description: 11 pages, 7 figures, 1 Table