cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effects of ovarian cancer cell-derived exosomes on vascular endothelial growth factor expression in endothelial cells
Creators: name: Ghorbanian, Mohammad
name: Babashah, Sadegh
name: Ataei, Farangis
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Ovarian cancer
subject: Cancer cell-derived exosomes
subject: Exo-OVCAR-3
subject: Vascular endothelial growth factor
subject: 610

description: Ovarian carcinoma is considered as a major clinical challenge worldwide. Exosomes, nano-sized intraluminal vesicles of multivesicular bodies, are secreted by most types of cells and play an important role in intercellular communication. Cancer cell-derived exosomes can develop cancer progression and metastasis by manipulating the local and distant biological environments. Angiogenesis is an important contributor to tumor progression. Vascular endothelial growth factor (VEGF) is the most potent pro-angiogenic protein and induces proliferation, sprouting, and vessel formation by endothelial cells. In this study, exosomes derived from ovarian epithelial cancer cells OVACAR-3 (exo-OVCAR-3) were successfully isolated and characterized by scanning electron microscopy in terms of size and morphology. Cellular internalization of exosomes labeled with PKH fluorescent dye was monitored by a fluorescence microscope. Our results elucidated that exosomes treatment (100 µg/ml) had a promoting effect on VEGF expression and secretion in endothelial cells. Furthermore, we demonstrated that exo-OVCAR-3 caused an increase in the proliferation and migration rate of endothelial cells. It seems that inducing VEGF by exo-OVCAR-3 can influence the vascular behavior of endothelial cells in vitro.
description: EXCLI Journal;Vol. 18 2019
A CONTENT ANALYSIS OF SOURCE-MESSAGE HETEROGENEITY IN MASS MEDIA COVERAGE OF AGROBIOTECHNOLOGY
Creators: name: Marks, Leonie A.
name: Kalaitzandonakes, Nicholas G.
name: Zakharova, Lucy
name: Marks, Leonie A.
name: Kalaitzandonakes, Nicholas G.
name: Zakharova, Lucy
Publisher: name: Unknown
Year: 2001
Subjects: Research and Development/Tech Change/Emerging Technologies
Teaching/Communication/Extension/Profession

description: In this paper, we use content analysis to examine the use of sources by US and UK newspaper reporters from 1990 to 1999. Positive (benefit) or negative (risk) messages are correlated with the "source" type in order to determine the degree of source-message heterogeneity in media reporting of agrobiotechnology.
Why paramagnetic chiral correlations in the long wavelength limit do not contribute to muon-spin relaxation
Creators: name: Yaouanc, A.
name: de Reotier, P. Dalmas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A crystal structure that cannot be superposed on its mirror image by any combination of rotations and translations is classified as chiral. Such crystal structures have gained importance in recent years since they are prone to host unconventional magnetic orders and to exhibit topological magnetic textures. These properties result from the Dzyaloshinskii-Moriya antisymmetric exchange interaction which is authorized when space inversion is broken. While recent reports have shown the muon spin rotation and relaxation technique to provide unique information about structural and dynamical properties which are specific to chiral magnets in their ordered phase, the question here is whether this technique is sensitive to paramagnetic chiral correlations that are observed in neutron scattering experiments above the critical temperature. In the relevant long wavelength limit, it is shown that they do not contribute to the relaxation rate, which in turn only probes non-chiral correlations.
description: 5 pages including an appendix
INFORMATION AND THE ADOPTION OF PRECISION FARMING
Creators: name: Daberkow, Stan G.
name: McBride, William D.
name: Daberkow, Stan G.
name: McBride, William D.
Publisher: name: Unknown
Year: 2001
Subjects: Farm Management

description: This study examines the relationship between precision farming information sources and precision farming adoption. The analysis accounts for the fact that not all farmers are aware of precision farming techniques and that those who are aware may not be a random sample. Results indicate that many information sources increase adoption relative to information only from the media, but contact with crop consultants has had the greatest impact on the adoption of precision farming technologies.
PEANUT QUOTA MARKETS AND PEANUT PRODUCTION AFTER FAIR
Creators: name: Chvosta, Jan
name: Rucker, Randal R.
name: Thurman, Walter N.
name: Chvosta, Jan
name: Rucker, Randal R.
name: Thurman, Walter N.
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural and Food Policy

description: The U.S. peanut program has limited peanut production since 1949. Unlike the programs for grains, cotton, and rice, the 1996 FAIR Act left the peanut program largely intact. As before FAIR (and since 1977) the right to grow peanuts for the domestic edible market is embodied in marketing quota, which can be leased and sold. The FAIR Act for the first time allowed quota movement across county lines. We now have four years of experience with peanut quota markets post-FAIR. In some parts of the country, quota has moved as much as the regulatory caps allow. But in most of the traditional peanut-growing areas of the Southeast there has been little cross-county movement. In this paper we analyze a large county-level panel of pre- and post-FAIR data to assess the effects of these changes in policy. We have compiled from USDA-FSA sources data on quota movements for virtually every peanut-producing county in the seven major peanut-producing states. We use these data to test microeconomic predictions of the effects of the loosening of transfer restrictions. Analysis of the data shows large quota movements in areas where observations on additionals production and lease rates would have predicted such. We find that movements in production, as distinct from movements in quota, cannot be explained entirely by FAIR, but can reasonably be attributed to changes in the profitability of growing competing crops such as cotton. The reduced profitability of the latter might itself be attributed in part to the elimination of cotton deficiency payments.
Protein-Ligand Complexes for Superimposing Ligands with Ligand Overlay as an Alternate Topology Model for λ-Dynamics-Based Calculations
Creators: name: Liesen, Michael
name: Vilseck, Jonah
Publisher: name: Zenodo
Year: 2024

description: Starting pdb files for the 5 protein-ligand complexes (45 ligands in total) evaluated in the manuscript titled "Superimposing Ligands with Ligand Overlay as an Alternate Topology Model for λ-Dynamics-Based Calculations".
Two-dimensional spectroscopy of a sunspot. III Thermal and kinematic structure of the penumbra at 0.5"
Creators: name: Rubio, L. R. Bellot
name: Schlichenmaier, R.
name: Tritschler, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the thermal and kinematic configuration of a sunspot penumbra using very high spectral and spatial resolution intensity profiles of the non-magnetic Fe I 557.6 nm line. The dataset was acquired with the 2D solar spectrometer TESOS. The profiles are inverted using a one-component model atmosphere with gradients of the physical quantities. From this inversion we obtain the stratification with depth of temperature, line-of-sight velocity, and microturbulence across the penumbra. Our results suggest that the physical mechanism(s) responsible for the penumbral filaments operate preferentially in the lower photosphere. We confirm the existence of a thermal asymmetry between the center and limb-side penumbra, the former being hotter by 100-150 K on average. We also investigate the nature of the bright ring that appears in the inner penumbra when sunspots are observed in the wing of spectral lines. The line-of-sight velocities retrieved from the inversion are used to determine the flow speed and flow angle at different heights in the photosphere. Both the flow speed and flow angle increase with optical depth and radial distance. Downflows are detected in the mid and outer penumbra, but only in deep layers (log tau_{500} < -1.4). We demonstrate that the velocity stratifications retrieved from the inversion are consistent with the idea of penumbral flux tubes channeling the Evershed flow. Finally, we show that larger Evershed flows are associated with brighter continuum intensities in the inner center-side penumbra. Dark structures, however, are also associated with significant Evershed flows. This leads us to suggest that the bright and dark filaments seen at 0.5" resolution are not individual flow channels, but a collection of them.
description: 15 pages with 18 Postscript figures. Submitted to Astronomy and Astrophysics (December 2005)
MECHANISM DESIGN FOR NUTRIENT TRADING UNDER ASYMMETRIC INFORMATION
Creators: name: Johansson, Robert C.
name: Johansson, Robert C.
Publisher: name: Unknown
Year: 2001
Subjects: Environmental Economics and Policy

description: The objective of this paper is to evaluate first- and second-best trading mechanisms for regulating point and nonpoint source phosphorus emissions. The trading mechanisms are differentiated on the degree to which regulators can observe abatement efforts. The deadweight losses attributable to informational asymmetries and those of the second-best mechanisms will provide regulators the shadow value of foregoing first-best measures.
Roselle attenuates cardiac hypertrophy after myocardial infarction in vivo and in vitro
Creators: name: Si, Lislivia Yiang-Nee
name: Ramalingam, Anand
name: Ali, Shafreena Shaukat
name: Aminuddin, Amnani
name: Ng, Pei-Yuen
name: Latip, Jalifah
name: Kamisah, Yusof
name: Budin, Siti Balkis
name: Zainalabidin, Satirah
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Cardiac dysfunction
subject: Cardiomyocyte hypertrophy
subject: Fibrosis
subject: Myocardial infarction
subject: Oxidative stress
subject: Roselle
subject: 610

description: Roselle (Hibiscus sabdariffa Linn) has been traditionally used as folk medicine for hypertension and maintaining cardiovascular health, with therapeutic potential in protecting against numerous cardiovascular diseases. However, it remains unclear whether roselle can be used for management of cardiac hypertrophy seen after myocardial in- farction (MI). This study therefore investigated the effects of aqueous roselle extract on cardiac hypertrophy aris- ing from myocardial infarction both in vivo and in vitro. For in vivo study, male Sprague-Dawley rats were divided into control or MI groups (receiving 85 mg/kg isoproterenol s.c. for 2 days) and were given roselle extract (100 mg/kg, p.o daily) for 28 days. Cardiac structure and functional changes were evaluated at study end-point using histology, Langendorff analysis and gene expression analysis. In vitro effects of roselle were also assessed on ANG II-induced cardiomyocytes hypertrophy using H9c2 cells, simulating cardiac hypertrophy evident after MI. Roselle significantly ameliorated MI-induced cardiac systolic and diastolic dysfunction, as seen across improve- ment in left ventricular developed pressure (LVDP) and its derivative (LVdP/dtmax) and isovolumic relaxation (Tau). Oxidative stress evident across elevated pro-oxidant markers (NOX2 subunit of NADPH oxidase and 8- isoprostane) as well as reduced antioxidant markers (superoxide dismutase and glutathione) were also significantly attenuated by roselle. Furthermore, roselle treatment markedly reduced markers of cardiac remodeling (cardiac hypertrophy and fibrosis) compared to the untreated MI rats. On in vitro analysis, roselle significantly attenuated ANG II-induced cardiomyoycte hypertrophy in dose-dependent manner. This study demonstrated that roselle at- nd dysfunction seen after MI both in vivo and in vitro, and these effects are likely mediated by phenolic compounds found in roselle extract.
description: EXCLI Journal;Vol. 18 2019
Apparent Ferromagnetism in Exfoliated Ultra-thin Pyrite Sheets
Creators: name: Puthirath, Anand B.
name: Balan, Aravind Puthirath
name: Oliveira, Eliezer F.
name: Sreepal, Vishnu
name: Hernandez, Francisco C. Robles
name: Gao, Guanhui
name: Chakingal, Nithya
name: Sassi, Lucas M.
name: Thibeorchews, Prasankumar
name: Costin, Gelu
name: Vajtai, Robert
name: Galvao, Douglas S.
name: Nair, Rahul R.
name: Ajayan, Pulickel M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Experimental evidence for ferromagnetic ordering in isotropic atomically thin two-dimensional crystals has been missing until a bilayer Cr2Ge2Te6, and a three-atom thick monolayer CrI3 are shown to retain ferromagnetic ordering at finite temperatures. Here, we demonstrate successful isolation of a non-van der Waals type ultra-thin nanosheet of FeS2 derived from naturally occurring pyrite mineral (FeS2) by means of liquid-phase exfoliation. Structural characterizations imply that (111) oriented sheets are predominant and is supported theoretically by means of density functional theory surface energy calculations. Spin-polarized density theory calculations further predicted that (111) oriented three-atom thick pyrite sheet has a stable ferromagnetic ground state different from its diamagnetic bulk counterpart. This theoretical finding is evaluated experimentally employing low temperature superconducting quantum interference device measurements and observed an anomalous ferromagnetic kind of behavior.
description: 21 pages, 5 figures
title: Efficacy and tolerability of fourteen-day sequential quadruple regimen
title: pantoprazole, bismuth, amoxicillin, metronidazole and or furazolidone as first-line therapy for eradication of Helicobacter pylori
titleType: AlternativeTitle
title: a randomized, double-blind clinical trial
titleType: AlternativeTitle
Creators: name: Mansour-Ghanaei, Fariborz
name: Samadi, Alireza
name: Joukar, Farahnaz
name: Tirgar Fakheri, Hafez
name: Hassanipour, Soheil
name: Ashoobi, Mohammad Taghi
name: Soltanipour, Soheil
name: Alizadeh, Ahmad
name: Rezamand, Gholamreza
name: Fathalipour, Mohammad
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Helicobacter pylori
subject: Eradication
subject: Furazolidone
subject: Sequential therapy
subject: Adverse effects
subject: 610

description: The optimal pharmacological regimen for eradication of Helicobacter pylori (H. pylori) has been investigated for many years. This study aimed to evaluate the efficacy and tolerability of bismuth-based quadruple therapy (B-QT) and a modified sequential therapy (ST) regimens in eradication of H. pylori. A randomized, double-blind trial was conducted on 344 patients. Patients with H. pylori infection and without a history of previous treatment were randomized to receive 14-day B-QT (bismuth subcitrate 240 mg, pantoprazole 40 mg, amoxicillin 1000 mg, and clarithromycin 500 mg twice daily) or 14-day ST (bismuth subcitrate 240 mg, pantoprazole 40 mg, amoxicillin 1000 mg, and metronidazole 500 mg twice a day for seven days followed by bismuth subcitrate 240 mg, pantoprazole 40 mg, amoxicillin 1000 mg, and furazolidone 100 mg twice a day for additional seven days). Drug adverse effects were assessed during the study. H. pylori eradication was determined eight weeks after the end of treatment using 14C-urea breath test. Based on per-protocol and intention-to-treat, the eradication rate was significantly higher (p<0.05) in the B-QT regimen 91.9 % (95 % CI; 88.1-94.0) and 90.2 % (95 % CI; 86.3-92.9), respectively compared to the ST regimen 80.8 % (95 % CI; 76.6-84.9) and 78.1 % (95 % CI; 73.7-82.4), respectively. The severity of vomiting and loss of appetite were significantly higher in ST regimen (p<0.05). The B-QT regimen was more effective and safer than the ST regimen. Conclusively, it is suggested to assess the efficacy and safety of this regimen in longer studies, larger population, and in other communities.
description: EXCLI Journal;Vol. 18 2019
Εργατικό δυναμικό και βιοοικονομία
Creators: name: Μηνακάκη, Ελένη-Βασιλική
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Βιοοικονομία
subject: Εργατικό δυναμικό
subject: Βιώσιμη οικονομία
subject: Ελλάδα

description: Η παρούσα εργασία πραγματεύεται το ζήτημα της βιοοικονομίας και του εργατικού δυναμικού αυτής. Όπως διαπιστώσαμε από την ανάλυση της πληθώρας των βιβλιογραφικών πηγών, η βιοοικονομία έχει ως αντικείμενο όλους τους τομείς και τα συστήματα που βασίζονται σε βιολογικούς πόρους. Περιλαμβάνει επίσης τις υπηρεσίες που παρέχουν όλοι οι τομείς της πρωτογενούς παραγωγής που χρησιμοποιούν και παράγουν βιολογικούς πόρους, δηλαδή η γεωργία, η δασοκομία, η αλιεία και οι υδατοκαλλιέργειες. Παράλληλα μπορούμε να αναφέρουμε ότι η βιοοικονομία είναι ένα νέο μοντέλο που σχετίζεται άμεσα με τη βιομηχανία και την οικονομία, γεγονός που διαφαίνεται και αναλύεται και στην παρούσα εργασία. Ο όρος του εργατικού δυναμικού καθώς και η συσχέτιση με την βιοοικονομία επίσης αναλύεται στην πορεία της εργασίας, μιας και αποτελεί βασική συνιστώσα του εξεταζόμενου θέματος.
VALUING THE HEALTH BENEFITS OF NUTRITION LABELING: A CASE STUDY FOR MEAT AND POULTRY PRODUCTS
Creators: name: Crutchfield, Stephen R.
name: Kuchler, Fred
name: Variyam, Jayachandran N.
name: Crutchfield, Stephen R.
name: Kuchler, Fred
name: Variyam, Jayachandran N.
Publisher: name: Unknown
Year: 2001
Subjects: Food Consumption/Nutrition/Food Safety

description: New rules issued by the U.S. Department of Agriculture requiring provision of nutrition information on raw meat and poultry products may encourage consumers to make healthier food choices. Reduced intake of fat and cholesterol may prevent future cases of stroke, heart disease, and cancer. The benefits of these rules are estimated to be $62 to $125 million annually.
Deep Neural Networks for Computational Optical Form Measurements
Creators: name: Hoffmann, Lara
name: Elster, Clemens
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Machine Learning (cs.LG)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Deep neural networks have been successfully applied in many different fields like computational imaging, medical healthcare, signal processing, or autonomous driving. In a proof-of-principle study, we demonstrate that computational optical form measurement can also benefit from deep learning. A data-driven machine learning approach is explored to solve an inverse problem in the accurate measurement of optical surfaces. The approach is developed and tested using virtual measurements with known ground truth.
description: 11 pages, 8 figures
ESTIMATION OF AN OPTIMAL TOMATO CONTRACT
Creators: name: Hueth, Brent
name: Ligon, Ethan
name: Hueth, Brent
name: Ligon, Ethan
Publisher: name: Unknown
Year: 2001
Subjects: Crop Production/Industries

description: This paper estimates an agency model of contracts used in California's processing-tomato industry. Model estimation proceeds in three stages. We first estimate growers' stochastic production possibilities, and then, for a given vector of preference parameters, compute an optimal compensation schedule. Finally, we compare computed compensations with actual compensations and choose preference parameters to minimize distance between the two. Assuming perfect competition and risk neutrality for processors, we obtain an estimate of .08 for growers' measure of constant absolute risk aversion (where returns are measured in units of $100/ton), and find that growers' effort cost is 1.8% of total operating cost. Welfare losses from information constraints are estimated at .59% of mean compensation, and quality measurement improves efficiency (measured as a percentage increase in expected quality) by 1.08%.
Ο συνδυασμός γνώσεων πληροφορικής και διοίκησης επιχειρήσεων στην αποτελεσματική λήψη αποφάσεων στις επιχειρήσεις
Creators: name: Χαρώνης, Κωνσταντίνος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Πληροφοριακή τεχνολογία
subject: Πληροφοριακά συστήματα
subject: Υβριδικά στελέχη
subject: Λήψη απόφασης

description: Η απόκτηση ενός αποτελεσματικού συστήματος διαχείρισης πληροφοριών και λήψης αποφάσεων από τα κορυφαία στελέχη των οργανισμών είναι ζωτικής σημασίας γι’ αυτούς. Αν τα στελέχη τους κατανοούν τις δυνατότητες της πληροφοριακής τεχνολογίας και των πληροφοριακών συστημάτων, τότε επιδρούν θετικά στην δημιουργία ενός οράματος που έχει ως κατεύθυνση την ολοκληρωμένη ενοποίηση της πληροφοριακής τεχνολογία με τις επιχειρηματικές λειτουργίες του οργανισμού. Ο συνδυασμός των πληροφοριακών και επιχειρηματικών γνώσεων, δίνει την δυνατότητα πρόβλεψης πιθανών ευκαιριών αλλά και ανάδειξης τεχνολογικών αναγκών και σημαντικής βελτίωσης της διαδικασίας λήψης αποφάσεων, δημιουργώντας με αυτούς τους τρόπους πιθανές πηγές ανταγωνιστικού πλεονεκτήματος. Υπάρχει ανάγκη δηλαδή για «υβριδικούς» διευθυντές που κατέχουν στο 100% και τους δύο αυτούς τύπους γνώσεων. Η επιτυχής εκμετάλλευση της πληροφοριακής τεχνολογίας γίνεται όλο και πιο σημαντική για την επιχειρηματική επιτυχία σήμερα και τα πραγματικά προβλήματα που αντιμετωπίζουν τα τμήματα πληροφοριακής τεχνολογίας δεν σχετίζονται με την τεχνική υποστήριξη αλλά με την τεράστια πρόκληση της ενοποίησης τους με τα υπόλοιπα τμήματα του οργανισμού. Στην παρούσα διπλωματική εργασία παρουσιάζεται θεωρητικά η διαδικασία λήψης απόφασης στις επιχειρήσεις, τα αντίστοιχα πληροφοριακά συστήματα, η ανάλυση των δεξιοτήτων των διοικητικών στελεχών, καθώς και η ανάλυση των υβριδικών στελεχών που αναφέραμε. Κύριος στόχος της μελέτης είναι η διαπίστωση της πιθανής αναγκαιότητας αυτών των στελεχών για τους οργανισμούς, όπως και η διερεύνηση των οφελών που προσφέρουν σε αυτούς τόσο στην αποτελεσματικότερη λήψη αποφάσεων όσο και συνολικά. Την θεωρητική ανάλυση πλαισιώνει έρευνα με μορφή συνέντευξης τριών υψηλόβαθμων στελεχών μεγάλων ελληνικών εταιριών.
Electrical control of the $g$-tensor of a single hole in a silicon MOS quantum dot
Creators: name: Liles, S. D.
name: Martins, F.
name: Miserev, D. S.
name: Kiselev, A. A.
name: Thorvaldson, I. D.
name: Rendell, M. J.
name: Jin, I. K.
name: Hudson, F. E.
name: Veldhorst, M.
name: Itoh, K. M.
name: Sushkov, O. P.
name: Ladd, T. D.
name: Dzurak, A. S.
name: Hamilton, A. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Single holes confined in semiconductor quantum dots are a promising platform for spin qubit technology, due to the electrical tunability of the $g$-factor of holes. However, the underlying mechanisms that enable electric spin control remain unclear due to the complexity of hole spin states. Here, we study the underlying hole spin physics of the first hole in a silicon planar MOS quantum dot. We show that non-uniform electrode-induced strain produces nanometre-scale variations in the HH-LH splitting. Importantly, we find that this \RR{non-uniform strain causes} the HH-LH splitting to vary by up to 50\% across the active region of the quantum dot. We show that local electric fields can be used to displace the hole relative to the non-uniform strain profile, allowing a new mechanism for electric modulation of the hole g-tensor. Using this mechanism we demonstrate tuning of the hole $g$-factor by up to 500\%. In addition, we observe a \RR{potential} sweet spot where d$g_{(1\overline{1}0)}$/d$V$ = 0, offering a configuration to suppress spin decoherence caused by electrical noise. These results open a path towards a previously unexplored technology: engineering of \RR{non-uniform} strains to optimise spin-based devices.
description: 12 pages, 4 figures
Solving Bethe-Salpeter equation in Minkowski space
Creators: name: Karmanov, V. A.
name: Carbonell, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We develop a new method of solving Bethe-Salpeter (BS) equation in Minkowski space. It is based on projecting the BS equation on the light-front (LF) plane and on the Nakanishi integral representation of the BS amplitude. This method is valid for any kernel given by the irreducible Feynman graphs. For massless ladder exchange, our approach reproduces analytically the Wick-Cutkosky equation. For massive ladder exchange, the numerical results coincide with the ones obtained by Wick rotation.
description: 10 pages, 4 figures
Single atom detection of calcium isotopes by atom trap trace analysis
Creators: name: Hoekstra, S.
name: Mollema, A. K.
name: Morgenstern, R.
name: Wilschut, H. W.
name: Hoekstra, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate a combination of an isotopically purified atom beam and a magneto-optical trap which enables the single atom detection of all stable isotopes of calcium (40, 42, 43, 44, 46 and 48). These isotopes range in abundance from 96.9 % (40Ca) to 0.004 (46Ca). The trap is loaded from an atomic beam which is decelerated in a Zeeman slower and subsequently deflected over an angle of 30 degrees by optical molasses. The isotope selectivity of the Zeeman slower and the deflection stage is investigated experimentally and compared with Monte Carlo simulations.
description: 8 pages, 9 figures, accepted for publication (PRA)
OPTIMAL MANAGEMENT OF A FOREST/WILDLIFE SYSTEM WITH BILATERAL EXTERNALITIES
Creators: name: Ready, Richard C.
name: Bergland, Olvar
name: Romstad, Eirik
name: Ready, Richard C.
name: Bergland, Olvar
name: Romstad, Eirik
Publisher: name: Unknown
Year: 2001
Subjects: Resource /Energy Economics and Policy

description: Browsing by large ungulate wildlife species damages valuable trees, but increases the productivity of the wildlife stock. The optimal management of trees and wildlife involves a tradeoff between these two impacts, as well as correct timing of tree harvests from each forest stand. For a model of moose and pine in Norway, it is found that harvest of adjacent forest stands should be adjusted over time to bring the stands into synch. Doing so maximizes the moose productivity boost that occurs immediately following harvest of mature trees, and protects the young trees from overbrowsing by spreading out the browsing pressure among more young trees. This result is, however, sensitive to the specification of the relationship between forage availability and moose productivity.
Competition between superconductivity and charge density waves
Creators: name: Kim, Ki-Seok
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We derive an effective field theory for the competition between superconductivity (SC) and charge density waves (CDWs) by employing the SO(3) pseudospin representation of the SC and CDW order parameters. One important feature in the effective nonlinear $σ$ model is the emergence of Berry phase even at half filling, originating from the competition between SC and CDWs, i.e., the pseudospin symmetry. A well known conflict between the previous studies of Oshikawa\cite{Oshikawa} and D. H. Lee et al.\cite{DHLee} is resolved by the appearance of Berry phase. The Berry phase contribution allows a deconfined quantum critical point of fractionalized charge excitations with $e$ instead of $2e$ in the SC-CDW quantum transition at half filling. Furthermore, we investigate the stability of the deconfined quantum criticality against quenched randomness by performing a renormalization group analysis of an effective vortex action. We argue that although randomness results in a weak disorder fixed point differing from the original deconfined quantum critical point, deconfinement of the fractionalized charge excitations still survives at the disorder fixed point owing to a nonzero fixed point value of a vortex charge.
description: adding a renormalization group analysis with a random fugacity term as an effect of randomness on a deconfined quantum critical point
title: Διαχείριση εφοδιαστικής αλυσίδας η περίπτωση της ΒΙΚΟΣ Α.Ε.
title: Supply chain in Vikos S.A. company
titleType: AlternativeTitle
Creators: name: Πολυμενέα, Ελένη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Εφοδιαστική αλυσίδα
subject: ΒΙΚΟΣ
subject: Logistics
subject: Supply chain

description: Στις μέρες μας εξαιτίας της παγκοσμιοποίησης και της ανταγωνιστικότητας που υπάρχει γενικότερα στις οικονομίες δημιουργείται η ανάγκη στις επιχειρήσεις για τη δόμηση μιας εφοδιαστικής αλυσίδας η οποία θα παίξει καθοριστικό ρόλο τόσο στην πορεία όσο και στην εξέλιξη τους. Στην παρούσα εργασία θα ασχοληθούμε με την εφοδιαστική αλυσίδα δηλαδή τις διαδικασίες μεταφοράς προϊόντων ή υπηρεσιών από το σημείο παραγωγής στο σημείο παράδοσης. Στόχος της πάντα είναι η μείωση του κόστους μεταφοράς παρέχοντας στον πελάτη τη βέλτιστη εξυπηρέτηση. Η διαχείριση της εφοδιαστικής σχετίζεται με την προσέγγιση πολλαπλών λειτουργιών σχετικά με την κυκλοφορία των πρώτων υλών στην επιχείρηση. Οι πρώτες ύλες χρησιμοποιούνται για τη δημιουργία των τελικών προϊόντων τα οποία θα μεταφερθούν μέσω των καναλιών διανομής στους τελικούς καταναλωτές. Στο τελευταίο κεφάλαιο της εργασίας θα ασχοληθούμε με τη μελέτη της εταιρείας Βίκος Α.Ε. όπου θα παρουσιάσουμε γενικές πληροφορίες για τη δομή, τη λειτουργία και την εταιρική κουλτούρα της επιχείρησης. Τέλος με τη χρήση διαγραμμάτων, πινάκων και της μεθόδου ABC θα αναλύσουμε τα προϊόντα της επιχείρησης.
title: Ναυτασφάλεια
title: Marine Insurance
titleType: AlternativeTitle
Creators: name: Πουλουπάτης, Γεώργιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Ναυτασφάλεια
subject: Θαλάσσια ασφάλιση
subject: Διαμήκης ανάλυση
subject: Marine insurance
subject: Longitudinal analysis
subject: Γενικευμένα γραμμικά μοντέλα
subject: Generalized linear models

description: Η έννοια της Ναυτασφάλειας είναι άρρηκτα συνδεδεμένη με την εξέλιξη και ανάπτυξη των θαλάσσιων εμπορευματικών μεταφορών. Η πολυπλοκότητα αυτής της κατηγορίας ασφαλίσεων οφείλεται στην ιδιαιτερότητα, η οποία χαρακτηρίζει την φύση της Ναυτιλίας. Στην παρούσα εργασία πραγματοποιείται μία σύντομη, αλλά ταυτόχρονα περιεκτική ανάλυση των βασικών αρχών της Ναυτασφάλειας. Επίσης, περιγράφονται με σαφήνεια οι επιμέρους κατηγορίες, οι οποίες την διακρίνουν. Σκοπός αυτής της ανάλυσης είναι η εξοικείωση των ερευνητών και των επαγγελματιών της Αναλογιστικής Επιστήμης με αυτήν την ιδιαίτερη κατηγορία ασφαλίσεων. Το ενδιαφέρον από πλευράς της Αναλογιστικής Επιστήμης, όσον αφορά την Ναυτασφάλεια έγκειται στην εκτίμηση ορισμένων βασικών μεγεθών. Τέτοιο μέγεθος αδιαμφισβήτητα αποτελεί το ύψος των αναμενόμενων απαιτήσεων, καθώς και ο προσδιορισμός των παραγόντων, που το επηρεάζουν. Επιπλέον, κρίσιμο ζήτημα πάντοτε για μία ασφαλιστική εταιρεία, η οποία δραστηριοποιείται στον χώρο της Ναυτασφάλειας είναι η εκτίμηση των αποθεμάτων, τα οποία πρέπει να τηρεί, προκειμένου να είναι ικανή να ανταπεξέλθει σε μελλοντικές ζημιές. Όσον αφορά τον προσδιορισμό των παραγόντων, οι οποίοι δρουν καταλυτικά στον καθορισμό του ύψους των απαιτήσεων, σε αυτή την διατριβή πραγματοποιείται μία προσέγγιση του όλου ζητήματος μέσω της διαμήκους ανάλυσης. Η συγκεκριμένη στατιστική μέθοδος βρίσκει συχνή εφαρμογή σε διάφορους τομείς των κοινωνικών και οικονομικών επιστημών. Για τις ανάγκες της παρούσας εργασίας εφαρμόζονται διάφορα μοντέλα της διαμήκους ανάλυσης σε δεδομένα, τα οποία αντλήθηκαν από μία ασφαλιστική εταιρεία. Από την εφαρμογή αυτών των μοντέλων προκύπτουν ορισμένα χρήσιμα συμπεράσματα. Τέλος, σχετικά με την εκτίμηση των απαιτούμενων αποθεμάτων, πραγματοποιείται μία συνδυαστική ανάλυση εφαρμόζοντας στην γνωστή μέθοδο Chain Ladder την θεωρία των Γενικευμένων Γραμμικών Μοντέλων.
Determinants of Foreign Direct Investment in the Food Manufacturing Industry
Creators: name: Wendt, Minh
name: Pederson, Glenn D.
name: Wendt, Minh
name: Pederson, Glenn D.
Publisher: name: Unknown
Year: 2006
Subjects: Agribusiness

description: This paper examines firm-specific characteristics in the food manufacturing industry that affect firms' decisions in accessing foreign markets via foreign direct investment (FDI). It also seeks to assess variations in the intensity level of multinational firm involvement in FDI given these characteristics. It finds that capital-intensive firms with higher levels of intangible assets, profitability, and knowledge capital are more likely to be MNEs. It also finds that intangible assets and knowledge capital underline the tendency of MNEs to invest more intensively abroad. Furthermore, firm size is found to play an important but not necessarily dominant role in FDI propensity and intensity.
Metformin restores the mitochondrial membrane potentials in association with a reduction in TIMM23 and NDUFS3 in MPP+-induced neurotoxicity in SH-SY5Y cells
Creators: name: Chanthammachat, Pitak
name: Dharmasaroja, Permphan
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: MPP +
subject: Metformin
subject: Mitochondria
subject: SH - SY5Y cells
subject: Parkinson ’ s disease
subject: 610

description: SH - SY5Y cells exposed to l - methyl - 4 - phenylpyridinium (MPP + ) develop mitochondrial dys- function and other cellular responses similar to th ose that occur in the dopaminergic neurons of patients with Parkinson ’ s disease (PD) . It has been shown in animal models of PD that neuronal death can be prevented by metformin, an anti - diabetic drug . Both MPP + and metformin inhibit complex I of the mitochondrial resp iratory chain. It has been reported that decreased levels of the mitochondrial inner membrane proteins TI MM23 and NDUFS3 are associated with the in- creased generation of reactive oxygen species and mitochondrial de polarization. In the present study, we investigated the e ffects of metformin on MPP + - induced neurotoxicity using differen- tiated human SH - SY5Y neuroblastoma cells . The results showed that pretreatment with met- formin increased the viability of MPP + - treated SH - SY5Y cells. Pretreatment with metformin decreased the expr ession of TIMM23 and NDUFS3 in MPP + - treated SH - SY5Y cells. This was correlated with reduced mitochondrial fragmenta tion and an improvement in the mitochondrial membrane potential . These results suggest that metformin pretreatment protects against MPP + - induced neurotoxicity, and offer insights into th e potential role of me tformin in protecting against toxin - induced parkinsonism
description: EXCLI Journal;Vol. 18 2019
Secondary particles spectra in the decay of a polarized top quark with anomalous $tWb$ coupling
Creators: name: Najafabadi, Mojtaba Mohammadi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Analytic expression for energy and angular dependence of a secondary charged lepton in the decay of a polarized top quark with anomalous $tWb$ couplings in the presence of all anomalous couplings are derived. The angular distribution of the b-quark is derived as well. It is presented that the charged lepton spin correlation coefficient is not very sensitive to the anomalous couplings. However, the b-quark spin correlation coefficient is sensitive to anomalous couplings and could be used as a powerful tool for searching of non-SM coupling.
description: 9 pages, 5 figures
title: Δ-Aminolevulinate dehydratase and glutathione peroxidase activity in Alzheimer's disease
title: a case-control study
titleType: AlternativeTitle
Creators: name: Garlet, Quelen Iane
name: Haskel, Maria Vaitsa Losh
name: Pereira, Romaiana Picada
name: Da Silva, Weber Cláudio Francisco Nunes
name: Da Rocha, João B. Teixeira
name: Oliveira, Cláudia Sirlene
name: Bonini, Juliana Sartori
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Alzheimer’s disease
subject: δ -ALA-D
subject: Gpx
subject: AD marker
subject: CDR
subject: MMSE
subject: 610

description: Alzheimer’s disease (AD) is a neurodegenerative pathology that affects elderly people all over the world. Several studies have demonstrated that oxidative stress is an aggravating factor for AD development and progression. Therefore, this study aimed to evaluate the activity of two oxidative stress markers, glutathione peroxidase (GPx) and δ -aminolevulinate dehydratase ( δ -ALA-D), as well as correlate them with blood metal levels and AD progression. For this purpose, 88 elderly individuals were divided in two groups: AD group (34 patients diagnosed with AD) and control group (34 subjects paired by age with the AD group). The Mini-Mental State Examination and the Clinical Dementia Rating (CDR ) were used as tools to classify the AD progression. GPx and δ -ALA-D activities were measured in all subjects through blood tests. Both enzymes’ activities were decreased in AD patients when compared to the age-matched control group, regardless of the CDR. Moreover, GPx activity was positively correlated with selenium levels in the blood; and the δ -ALA-D activity was negatively correlated with blood cop- per levels. Taken together, our results indicated that, for the first time, blood δ -ALA-D activity was significantly inhibited in AD patients. While literature reports conflicting data regarding GPx activity in AD patients, the δ - ALA-D activity seems to be a more consistent tool to be applied as an earlier AD marker.
description: EXCLI Journal;Vol. 18 2019
Spread of Tweets in Climate Discussions
Creators: name: Xia, Yan
name: Chen, Ted Hsuan Yun
name: Kivelä, Mikko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Characterising the spreading of ideas within echo chambers is essential for understanding polarisation. In this paper, we explore the characteristics of popular and viral content in climate change discussions on Twitter around the 2019 announcement of the Nobel Peace Prize, where we find the retweet network of users to be polarised into two well-separated groups of activists and sceptics. Operationalising popularity as the number of retweets and virality as the spreading probability inferred using an independent cascade model, we find that the viral themes echo and differ from the popular themes in interesting ways. Most importantly, we find that the most viral themes in the two groups reflect different types of bonds that tie the community together, yet both function to enhance ingroup connections while repulsing outgroup engagement. With this, our study sheds light, from an information spreading perspective, on the formation and upkeep of echo chambers in climate discussions.
Schools of Fishermen: A Theory of Information Sharing in Spatial Search
Creators: name: Lynham, John
name: Lynham, John
Publisher: name: Unknown
Year: 2006
Subjects: Resource /Energy Economics and Policy

description: Fishermen who compete for a resource in an open access setting generally do not share information amongst each other about where stocks are located. On the other hand, in fisheries where there are established property rights or fishing cooperatives, fishermen tend to share information with each other. Recent work in developing spatial models of fishermen behavior has generally ignored the effect that sharing information about where stocks are located can have. We develop a behavioral model of search amongst spatial resource harvesters that allows for varying degrees of information sharing. We demonstrate that informational cascades may lead to extremely inefficient spatial search by fishermen that do not share information and that this inefficiency may be persistent over time. We define a new parameter, information-dependent catchability, which captures the degree to which information sharing improves the efficiency of spatial search. We argue that institutions change the incentives to share information; information-dependent catchability will differ within a fishery depending on the specific management institutions adopted. This leads to theoretical predictions which depart from standard models but account for a wider range of field observations. In particular, we derive the conditions under which closing access to a fishery would have such a drastic impact on the incentives to share information (and hence, the efficiency of search) that total effort in the fishery will be unaffected by restricting access. We derive the equivalent conditions for steady state harvest and stock levels. Furthermore, we make an important distinction between Property Rights Rents and Information Sharing Rents (economic rents that can be attributed solely to changes in information-sharing). The shiroebi shrimp fishery in Shinminato, Japan provides an ideal natural experiment to test the impact of information sharing. Field observations from this fishery strongly accord with the predictions of the model presented in this paper.
Up-regulation of miR-381 inhibits NAD+ salvage pathway and promotes apoptosis in breast cancer cells
Creators: name: Bolandghamat Pour, Zahra
name: Nourbakhsh, Mitra
name: Mousavidzadeh, Kazem
name: Madjd, Zahra
name: Ghorbanhosseini, Seyedeh Sara
name: Abdolvahabi, Zohreh
name: Hesari, Zahra
name: Mobaser, Samira Ezzati
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Nicotinamide phosphoribosyltransferase
subject: Nicotinamide adenine dinucleotide
subject: miR-381
subject: Apoptosis
subject: Breast cancer
subject: Tumor suppression
subject: 610

description: Nicotinamide phosphoribosyltransferase (NAMPT), a rate-limiting enzyme involved in nicotinamide adenine di- nucleotide (NAD) salvage pathway, is overexpressed in many human malignancies such as breast cancer. This enzyme plays a critical role in survival and growth of cancer cells. MicroRNAs (miRNAs) are among the most important regulators of gene expression, and serve as potential targets for diagnosis, prognosis, and therapy of breast cancer. Therefore, the aim of this study was to asse ss the effect of NAMPT inhibition by miR-381 on breast cancer cell survival. MCF-7 and MDA-MB-2 31 cancer cell lines were transfected with miR-381 mimic, inhibitor, and their corresponding negative controls (NCs). Subsequently, the level of NAMPT and NAD was assessed using real-time PCR, immuno-blotting, and enzymatic methods, resp ectively. In order to evalua te apoptosis, cells were labelled with Annexin V-FITC and propidium iodide and analyzed by flow cytometry. Bioinformatics analysis was performed to recognize whether NAMPT 3 ′ -untranslated region (UTR) is a direct target of miR-381 and the results were authenticated by the luciferase re porter assay using a vector containing the 3 ′ -UTR sequence of NAMPT. Our results revealed that the 3 ′ -UTR of NAMPT was a direct target of miR-381 and its up-regulation decreased NAMPT gene and protein expression, leading to a notable reduction in intracellular NAD and subse- quently cell survival and induction of apoptosis. It can be concluded that miR-381 has a vital role in tumor sup- pression by down-regulation of NAMPT, and it can be a promising candidate for breast cancer therapy.
description: EXCLI Journal;Vol. 18 2019
Bose-Einstein correlations: a study of an invariance group
Creators: name: Bialas, A.
name: Zalewski, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A group of transformations changing the phases of the single particle density matrix, but leaving unchanged the predictions for identical particles concerning the momentum distributions, momentum correlations etc., is identified. Its implications for the determinations of the interaction region from studies of Bose-Einstein correlations are discussed.
description: 15 pages LateX + one figure eps
Measuring and Visualizing Place-Based Space-Time Job Accessibility
Creators: name: Hu, Yujie
name: Downs, Joni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: General Economics (econ.GN)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: Place-based accessibility measures, such as the gravity-based model, are widely applied to study the spatial accessibility of workers to job opportunities in cities. However, gravity-based measures often suffer from three main limitations: (1) they are sensitive to the spatial configuration and scale of the units of analysis, which are not specifically designed for capturing job accessibility patterns and are often too coarse; (2) they omit the temporal dynamics of job opportunities and workers in the calculation, instead assuming that they remain stable over time; and (3) they do not lend themselves to dynamic geovisualization techniques. In this paper, a new methodological framework for measuring and visualizing place-based job accessibility in space and time is presented that overcomes these three limitations. First, discretization and dasymetric mapping approaches are used to disaggregate counts of jobs and workers over specific time intervals to a fine-scale grid. Second, Shen (1998) gravity-based accessibility measure is modified to account for temporal fluctuations in the spatial distributions of the supply of jobs and the demand of workers and is used to estimate hourly job accessibility at each cell. Third, a four-dimensional volumetric rendering approach is employed to integrate the hourly job access estimates into a space-time cube environment, which enables the users to interactively visualize the space-time job accessibility patterns. The integrated framework is demonstrated in the context of a case study of the Tampa Bay region of Florida. The findings demonstrate the value of the proposed methodology in job accessibility analysis and the policy-making process.
Cross-ladder effects in Bethe-Salpeter and Light-Front equations
Creators: name: Carbonell, J.
name: Karmanov, V. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Bethe-Salpeter (BS) equation in Minkowski space for scalar particles is solved for a kernel given by a sum of ladder and cross-ladder exchanges. The solution of corresponding Light-Front (LF) equation, where we add the time-ordered stretched boxes, is also obtained. Cross-ladder contributions are found to be very large and attractive, whereas the influence of stretched boxes is negligible. Both approaches -- BS and LF -- give very close results.
description: 11 pages, 7 figures
title: Towards the development of advanced packing design for distillation in rotating packed beds
title: dedicated to Prof. Dr. techn. Hans-Jörg Bart on the occasion of his 65th birthday
titleType: AlternativeTitle
Creators: name: Qammar, Hina
name: Gladyszewski, Konrad
name: Górak, Andrzej
name: Skiborowski, Mirko
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Distillation
subject: Mass transfer and pressure drop
subject: Packing design
subject: Rotating packed bed
subject: 3D printing
subject: 660

description: The growing demand for flexible and compact separation technologies has promoted the application of high‐gravity technology, like rotating packed beds (RPBs). Mass transfer characterization and packing design play an important role in the development of this technology. This article provides a systematic approach towards the evaluation of packing and the development of advanced packing design for distillation in RPBs. For the latter, an additive manufacturing approach is used to develop a new Zickzack packing for RPBs. The new packing provides better mass transfer at reduced pressure drop compared to available conventional packings, while being competitive in terms of mass transfer with the industrially applied rotating zigzag bed at significantly reduced pressure drop.
description: Chem. Ing. Tech.;91(11)