cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum backreaction (Casimir) effect. II. Scalar and electromagnetic fields
Creators: name: Herdegen, Andrzej
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Casimir effect in most general terms may be understood as a backreaction of a quantum system causing an adiabatic change of the external conditions under which it is placed. This paper is the second installment of a work scrutinizing this effect with the use of algebraic methods in quantum theory. The general scheme worked out in the first part is applied here to the discussion of particular models. We consider models of the quantum scalar field subject to external interaction with ``softened'' Dirichlet or Neumann boundary conditions on two parallel planes. We show that the case of electromagnetic field with softened perfect conductor conditions on the planes may be reduced to the other two. The ``softening'' is implemented on the level of the dynamics, and is not imposed ad hoc, as is usual in most treatments, on the level of observables. We calculate formulas for the backreaction energy in these models. We find that the common belief that for electromagnetic field the backreaction force tends to the strict Casimir formula in the limit of ``removed cutoff'' is not confirmed by our strict analysis. The formula is model dependent and the Casimir value is merely a term in the asymptotic expansion of the formula in inverse powers of the distance of the planes. Typical behaviour of the energy for large separation of the plates in the class of models considered is a quadratic fall-of. Depending on the details of the ``softening'' of the boundary conditions the backreaction force may become repulsive for large separations.
description: 50 pages, AMS-LaTeX; to appear in Ann. H. Poincare
Co-financing Implications for Regional Policy-Making: A Case Study for the Agri-environmental Programme in Saxony-Anhalt
Creators: name: Kirschke, Dieter
name: Hager, Astrid
name: Jechlitschka, Kurt
name: Wegener, Stefan
name: Kirschke, Dieter
name: Hager, Astrid
name: Jechlitschka, Kurt
name: Wegener, Stefan
Publisher: name: Unknown
Year: 2005
Subjects: subject: Environmental Economics and Policy
subject: agri-environmental programmes
subject: co-financing
subject: federalism
subject: interactive programming
subject: policy-making

description: Financing agri-environmental programmes in the European Union (EU) takes place in a multi-level system with mixed co-financing and shared financial responsibilities. In this paper we analyse how co-financing influences policy-making in regions taking the case of the agri-environmental programme in Saxony-Anhalt. Using an interactive linear programming approach the implications of several co-financing scenarios are analysed. EU co-financing certainly enhances the financial volume for the agri-environmental programme in Saxony-Anhalt; but as regional policy-making is distorted by the scheme of mixed co-financing as compared to unconditional financial transfers, the priorities for measures vary depending on different EU co-financing scenarios.
Μοντέλα μεικτού ακέραιου προγραμματισμού για την δρομολόγηση οχημάτων περιορισμένης χωρητικότητας με χρονικούς περιορισμούς και χρονικά παράθυρα
Creators: name: Τσομπανίδης, Βασίλειος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Μεικτός ακέραιος προγραμματισμός
subject: Δρομολόγηση οχημάτων

description: Τα προβλήματα δρομολόγησης οχημάτων έχουν αποτελέσει αντικείμενο ενδελεχούς έρευνας από την επιστημονική κοινότητα τις τελευταίες δεκαετίες λόγω του θεωρητικού ενδιαφέροντος που παρουσιάζουν αλλά και των θετικών οικονομικών αποτελεσμάτων που αποφέρει η βέλτιστη λύση τους. Στη διεθνή βιβλιογραφία συναντάτε μια πληθώρα μοντέλων δρομολόγησης οχημάτων τα οποία εξειδικεύονται στην προσομοίωση προβλημάτων που συναντώνται στο περιβάλλον των μεταφορών. Η επίλυση των διαφόρων μοντέλων δρομολόγησης με χρήση πακέτων βελτιστοποίησης έχει αποδειχτεί ότι μπορεί να μειώσει το κόστος μεταφορών στα Logistics έως και 20% (Λάιος, 2010). Στην παρούσα διπλωματική εργασία παρουσιάζονται κάποια από τα πιο κλασικά μοντέλα δρομολόγησης που συναντώνται στην διεθνή βιβλιογραφία. Στη συνέχεια επιχειρείται η δημιουργία δυο νέων μοντέλων δρομολόγησης τα οποία βασίζονται στα μοντέλα δρομολόγησης οχημάτων με χρονικά παράθυρα και περιορισμένη χωρητικότητα. Τα μοντέλα διαθέτουν αυξημένη πληροφορία αναφορικά με τις δυνατότητες των οχημάτων που απαρτίζουν τον στόλο αλλά και περιορισμούς που εξασφαλίζουν την ελαχιστοποίηση των οχημάτων και την τήρηση του εργασιακού οκταώρου. Τέλος, τα αξιολογούνται με πειράματα τα οποία εξετάζουν την σωστή λειτουργία τους καθώς και το μέγεθος των προβλημάτων που είναι ικανά να λύσουν. Στα πλαίσια της εργασίας πραγματοποιείται επίσης σύγκριση της χρονικής αποτελεσματικότητας των δύο μοντέλων με τα λογισμικά cplex και gurobi
Zur Bedeutung des Landwirtschaftlichen Clusters fur Landliche Raume
Creators: name: Dannenberg, Peter
name: Kulke, Elmar
name: Dannenberg, Peter
name: Kulke, Elmar
Publisher: name: Unknown
Year: 2005
Subjects: subject: Community/Rural/Urban Development
subject: Institutional and Behavioral Economics
subject: regional networks
subject: cluster
subject: commodity chains
subject: farms

description: In human geography the concepts of regional branch clusters have become increasingly important. In these concepts firms of the same or related supply chains work together and cooperate in networks of the same regional, cultural and social background. According to their regional proximity, firms can reduce their transaction costs. Also, having the same regional, cultural and social roots, it is easier for the actors of the co-operation networks to trustfully exchange competition relevant knowledge and to learn from each other. Therefore, the members of these regional clusters posses a higher ability to innovate and thus become competitive. While these concepts were generally based on industrial agglomerations, in 2004 we made a survey on 332 farmers in the rural districts Pyrzyce (West-Poland) and Elbe-Elster (Eastern Germany). The results of this work show the existence of an agrarian cluster or agrarian system based on an intensive material and immaterial cross-linking between farms and complementary units. Farms in this cluster are competitively better off than nonintegrated farms and some of them even have the potential to improve their position of power.
Analysis of paint flow pulsations during high-speed rotary bell atomization
Creators: name: Oswald, Walter
name: Lauk, Jan
name: Gödeke, Lutz
name: Erhard, Peter
name: Willenbacher, Norbert
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Pulsation
subject: High-speed rotary bell atomization
subject: Automotive coatings
subject: Image analysis
subject: Fourier transformation
subject: 660

description: High-speed rotary bell atomization is the preeminent coating technique in the automotive industry. It is widely accepted that a narrow droplet size distribution and constant spray are necessary in order to guarantee uniform film thickness and high-quality appearance. This may be deteriorated by paint flow pulsations. So far, however, no studies exist regarding such fluctuations quantitatively for this type of atomizers. We fill this gap using image analysis of high-speed recordings close to the bell edge. We could show that the fundamental pulsation frequency increases linearly with rotational speed. A ratio of pulsation frequency and true rotational speed of about 3 was found, indicating that pulsations were initiated mainly by the three struts of the distributor disc. The coefficient of variation, i.e., the amplitude of fluctuation increased with decreasing liquid volume rate and rotational speed. Beyond that, we could show that the formation of droplets larger than 100 μm, which are assumed to cause paint defects, is promoted by the degree of fluctuation. These findings may stimulate development of bell cups showing less paint flow pulsations.
description: Coatings;2019, 9(10), 674
[Brev til DKNVS]
Creators: name: Schwach, Conrad Nicolai
name: Det Kongelige Norske Videnskabers Selskab (DKNVS)
Publisher: name: Unknown
Year: 1848

description: Div. brev til VS direksjon
description: Skrivelser uten journalnr., men merket A/1848 - Æ/1848. Polydoc nr. 1: 3388. Polydoc nr. 2: 2495.
Explanations of Black-Box Model Predictions by Contextual Importance and Utility
Creators: name: Anjomshoae, Sule
name: Främling, Kary
name: Najjar, Amro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The significant advances in autonomous systems together with an immensely wider application domain have increased the need for trustable intelligent systems. Explainable artificial intelligence is gaining considerable attention among researchers and developers to address this requirement. Although there is an increasing number of works on interpretable and transparent machine learning algorithms, they are mostly intended for the technical users. Explanations for the end-user have been neglected in many usable and practical applications. In this work, we present the Contextual Importance (CI) and Contextual Utility (CU) concepts to extract explanations that are easily understandable by experts as well as novice users. This method explains the prediction results without transforming the model into an interpretable one. We present an example of providing explanations for linear and non-linear models to demonstrate the generalizability of the method. CI and CU are numerical values that can be represented to the user in visuals and natural language form to justify actions and explain reasoning for individual instances, situations, and contexts. We show the utility of explanations in car selection example and Iris flower classification by presenting complete (i.e. the causes of an individual prediction) and contrastive explanation (i.e. contrasting instance against the instance of interest). The experimental results show the feasibility and validity of the provided explanation methods.
Missing numbers progress monitoring test level 5a. A mathematics curriculum-based measurement (CBM) on the online platform www.levumi.de
Creators: name: Anderson, Sven
name: Schurig, Michael
name: DeVries, Jeff
name: Gebhardt, Markus
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: CBM
subject: curriculum-based measurement
subject: special education
subject: mathematical competencies
subject: missing numbers
subject: progress monitoring
subject: test
subject: 370
subject: Sonderpädagogik
subject: Mathematik
subject: Test

description: Missing number is a test on the web-based progress-monitoring platform Levumi (www.levumi.de; Jungjohann, DeVries, Gebhardt & Mühling, 2018). The test at level 5a consists of an item pool of 70 items. The test duration is currently 5 minutes (as of January 2020). On the Levumi platform, the tasks are selected randomly from the item pool during the test period, so that a large number of possible parallel test versions can be generated automatically. The appendix contains an exemplary paper and pencil test version. Table 1 is the Q-matrix for the missing number test at level 5a composed of 14 dichotomously scored items and hypothesized difficulty parameters (DP) based on the integrated theory of numerical development (Siegler, 2016). Siegler (2016) provides with the integrated theory of numerical development a combined model of the development of numerical competence. Within this theory, arithmetic follows from the expansion of the mental number line. Siegler's theory offers an explanation for a number of discoveries within research into the development of mathematical competence: size and distance effects, the learning of various mathematical operations and SNARC effects (spatial-numerical association of response codes).
The HIPASS Catalogue: III - Optical Counterparts & Isolated Dark Galaxies
Creators: name: Doyle, Marianne T.
name: Drinkwater, M. J.
name: Rohde, D. J.
name: Pimbblet, K. A.
name: Read, M.
name: Meyer, M. J.
name: Zwaan, M. A.
name: Ryan-Weber, E.
name: Stevens, J.
name: Koribalski, B. S.
name: Webster, R. L.
name: Staveley-Smith, L.
name: Barnes, D. G.
name: Howlett, M.
name: Kilborn, V. A.
name: Waugh, M.
name: Pierce, M. J.
name: Bhathal, R.
name: de Blok, W. J. G.
name: Disney, M. J.
name: Ekers, R. D.
name: Freeman, K. C.
name: Garcia, D. A.
name: Gibson, B. K.
name: Harnett, J.
name: Henning, P. A.
name: Jerjen, H.
name: Kesteven, M. J.
name: Knezek, P. M.
name: Mader, S.
name: Marquarding, M.
name: Minchin, R. F.
name: O'Brien, J.
name: Oosterloo, T.
name: Price, R. M.
name: Putman, M. E.
name: Ryder, S. D.
name: Sadler, E. M.
name: Stewart, I. M.
name: Stootman, F.
name: Wright, A. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the largest catalogue to date of optical counterparts for HI radio-selected galaxies, Hopcat. Of the 4315 HI radio-detected sources from the HI Parkes All Sky Survey (Hipass) catalogue, we find optical counterparts for 3618 (84%) galaxies. Of these, 1798 (42%) have confirmed optical velocities and 848 (20%) are single matches without confirmed velocities. Some galaxy matches are members of galaxy groups. From these multiple galaxy matches, 714 (16%) have confirmed optical velocities and a further 258 (6%) galaxies are without confirmed velocities. For 481 (11%), multiple galaxies are present but no single optical counterpart can be chosen and 216 (5%) have no obvious optical galaxy present. Most of these 'blank fields' are in crowded fields along the Galactic plane or have high extinctions. Isolated 'Dark galaxy' candidates are investigated using an extinction cut of ABj < 1 mag and the blank fields category. Of the 3692 galaxies with an ABj extinction < 1 mag, only 13 are also blank fields. Of these, 12 are eliminated either with follow-up Parkes observations or are in crowded fields. The remaining one has a low surface brightness optical counterpart. Hence, no isolated optically dark galaxies have been found within the limits of the Hipass survey.
description: 10 pages, 15 figures, MNRAS (in press)
Cross-Kerr-based information transfer processes
Creators: name: Lee, Jinhyoung
name: Paternostro, M.
name: Ogden, C.
name: Cheong, Y. W.
name: Bose, S.
name: Kim, M. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The realization of nonclassical states is an important task for many applications of quantum information processing. Usually, properly tailored interactions, different from goal to goal, are considered in order to accomplish specific tasks within the general framework of quantum state engineering. In this paper we remark on the flexibility of a cross-Kerr nonlinear coupling in hybrid systems as an important ingredient in the engineering of nonclassical states. The general scenario we consider is the implementation of high cross-Kerr nonlinearity in cavity-quantum electrodynamics. In this context, we discuss the possibility of performing entanglement transfer and swapping between a qubit and a continuous-variable state. The recently introduced concept of entanglement reciprocation is also considered and shown to be possible with our scheme. We reinterpret some of our results in terms of applications of a generalized Ising interaction to systems of different nature.
description: 8 pages, 4 figures, RevTeX4
ΔΟΠ και βιωσιμότητα ερευνητικών οργανισμών
Creators: name: Χαρτζάλα, Κορνηλία-Άννα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Βιωσιμότητα
subject: Έρευνα
subject: Βιώσιμη ανάπτυξη

description: Στο πλαίσιο του ταχύτατα μεταβαλλόμενου κόσμου, η επιστημονική κοινότητα έρχεται συνεχώς αντιμέτωπη με νέες προκλήσεις και επείγουσες καταστάσεις. Αυτό έχει σαν αποτέλεσμα να δοκιμάζονται συνεχώς οι δυνατότητες και τα όρια των ερευνητικών οργανισμών τόσο σε επίπεδο επιστημονικών δυνατοτήτων όσο και διοικητικής επάρκειας. Δεδομένων των αναγκών που δημιουργούνται για εξελιγμένες επιστημονικές μεθόδους που θα αποτελέσουν βοήθεια για την κοινωνία και το περιβάλλον, κρίνεται απαραίτητο και ένα σύγχρονο σύστημα διοίκησης του συνόλου του οργανισμού, που θα ανταποκρίνεται στις όλο αυξανόμενες ανάγκες. Καθώς όμως το ευρύ κοινό δεν είναι εξοικειωμένο με τις επιστημονικές πρακτικές και το έργο που παράγεται, απαιτούνται ενέργειες εξωστρέφειας που θα προσεγγίσουν το ευρύ κοινό και θα καταστήσουν γνωστό το έργο του. Αυτό θα έχει σαν αποτέλεσμα την αλληλεπίδραση μεταξύ κοινωνίας και επιστημονικού κόσμου, παρέχοντας μια αλληλοβοήθεια με πολλαπλά οφέλη. Στην παρούσα διπλωματική εργασία αναλύεται ένας από τους τρόπους εξωστρέφειας που θα μπορούσε να πραγματοποιηθεί στο πλαίσιο δράσεων ενός ερευνητικού οργανισμού. Καθώς το επιστημονικό έργο που παράγεται είναι πολύπλευρο και επηρεάζει διαφόρους τομείς όπως την ευρύτερη κοινωνία και το περιβάλλον, η έκθεση βιωσιμότητας αποτελεί την καταλληλότερη μέθοδο για παρουσίαση του ερευνητικού έργου που παράγεται και του γενικότερου θετικού αντίκτυπου που δημιουργείται από τις δράσεις του, παρέχοντας δεδομένα και μετρήσεις σε ετήσια βάση.
Generalized binary time series models
Creators: name: Jentsch, Carsten
name: Reichmann, Lena
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Binary time series
subject: Autoregressive-moving average
subject: Autocovariance structure
subject: Yule–Walker equations
subject: Stationarity
subject: 310

description: The serial dependence of categorical data is commonly described using Markovian models. Such models are very flexible, but they can suffer from a huge number of parameters if the state space or the model order becomes large. To address the problem of a large number of model parameters, the class of (new) discrete autoregressive moving-average (NDARMA) models has been proposed as a parsimonious alternative to Markov models. However, NDARMA models do not allow any negative model parameters, which might be a severe drawback in practical applications. In particular, this model class cannot capture any negative serial correlation. For the special case of binary data, we propose an extension of the NDARMA model class that allows for negative model parameters, and, hence, autocorrelations leading to the considerably larger and more flexible model class of generalized binary ARMA (gbARMA) processes. We provide stationary conditions, give the stationary solution, and derive stochastic properties of gbARMA processes. For the purely autoregressive case, classical Yule–Walker equations hold that facilitate parameter estimation of gbAR models. Yule–Walker type equations are also derived for gbARMA processes.
description: Econometrics;2019, 7(4), 47
Renormalization group equations as 'decoupling' theorems
Creators: name: Yang, Ji-Feng
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a simple derivation of renormalization group equations and Callan-Symanzik equations as decoupling theorems of the structures underlying effective field theories.
description: 7 pages, no figure, revtex4, additional typos removed, published in Phys. Lett. B
Interstrand pairing patterns in $β$-barrel membrane proteins: the positive-outside rule, aromatic rescue, and strand registration prediction
Creators: name: Jackups,, Ronald
name: Liang, Jie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: $β$-barrel membrane proteins are found in the outer membrane of gram-negative bacteria, mitochondria, and chloroplasts. We have developed probabilistic models to quantify propensities of residues for different spatial locations and for interstrand pairwise contact interactions involving strong H-bonds, side-chain interactions, and weak H-bonds. The propensity values and p-values measuring statistical significance are calculated exactly by analytical formulae we have developed. Contrary to the ``positive-inside'' rule for helical membrane proteins, $β$-barrel membrane proteins follow a significant albeit weaker ``positive-outside'' rule, in that the basic residues Arg and Lys are disproportionately favored in the extracellular cap region and disfavored in the periplasmic cap region. Different residue pairs prefer strong backbone H-bonded interstrand pairings (e.g. Gly-Aromatic) or non-H-bonded pairings (e.g. Aromatic-Aromatic). In addition, Tyr and Phe participate in aromatic rescue by shielding Gly from polar environments. These propensities can be used to predict the registration of strand pairs, an important task for the structure prediction of $β$-barrel membrane proteins. Our accuracy of 44% is considerably better than random (7%) and other studies. Our results imply several experiments that can help to elucidate the mechanisms of in vitro and in vivo folding of $β$-barrel membrane proteins. See supplementary material after the bibliography for detailed techniques.
description: 26 pages, 4 figures, and 4 tables
title: How can climate resilience be measured and visualized?
title: Assessing a vague concept using GIS-based fuzzy logic
titleType: AlternativeTitle
Creators: name: Schaefer, Mathias
name: Thinh, Nguyen Xuan
name: Greiving, Stefan
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: Climate resilience
subject: Sustainable development
subject: Urban planning
subject: Remote sensing
subject: Fuzzy logic
subject: Compromise programming
subject: 710

description: As negative impacts of climate change tend to increase in the future, densely-populated cities especially need to take action on being robust against natural hazards. Consequently, there is a growing interest from scientists in measuring the climate resilience of cities and regions. However, current measurements are usually assessed on administrative levels, not covering potential hotspots of hazardous or sensitive areas. The main aim of this paper focusses on the measurement of climate resilience in the City of Dortmund, Germany, using Geographic Information Systems (GIS). Based on a literature review, we identified five essential components of climate resilience and initially designed a theoretical framework of 18 indicators. Since climate resilience is still a vague concept in scientific discourses, we implemented local expert knowledge and fuzzy logic modelling into our analysis. The benefit of this study not only lies in the fine-scale application, but also in the relevance for multiple disciplines by integrating social and ecological factors. We conclude that climate resilience varies within the city pattern, with the urban core tending to be less resilient than its surrounding districts. As almost the entire geodata set used is freely available, the presented indicators and methods are to a certain degree applicable to comparable cities.
description: Sustainability;12(2)
A new radial system of dark globules in Monoceros
Creators: name: Carrasco-González, C.
name: López, R.
name: Gyulbudaghian, A.
name: Anglada, G.
name: Lee, C. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We analyze the LBN 978 HII region in order to study the HII/molecular cloud interaction. Methods. We used the IAC-80 telescope to image the region with narrow-band filters and the Very Large Array to obtain a radio continuum map at 3.6 cm. We also used the DSS2 red images and the NRAO VLA Sky Survey at 20 cm. Results. We have discovered a new radial system of dark globules associated with the LBN 978 HII region, containing a group of at least eight cometary bright-rimmed globules with the same morphological type. The brightest source is also detected in the radio continuum. Analysis of optical and radio emission suggest that this object is photoionized by HD 47432, the central star of the LBN 978 HII region.
description: 4 pages, 3 Figures. Accepted by Astronomy & Astrophysics Letters
Kommunikationsbeziehungen der Amter fur Landwirtschaft und Flurneuordnung im Bereich der Agrarumweltprogramme - Fallstudie Sachsen-Anhalt
Creators: name: Prager, Katrin
name: Nagel, Uwe Jens
name: Prager, Katrin
name: Nagel, Uwe Jens
Publisher: name: Unknown
Year: 2005
Subjects: subject: Environmental Economics and Policy
subject: communication process
subject: agri-environmental schemes
subject: agri-environmental networks
subject: participation
subject: acceptance
subject: bottom-up approach
subject: inter-organisational communication

description: The administration and implementation of agri-environmental schemes is one of the tasks of Agricultural Agencies (Amter fur Landwirtschaft und Flurneuordnung). These agencies thus play a major role for all farmers interested or participating in funding schemes. Assuming that feeding information about preferences and needs of programme entrants into the agri-environmental decision-making process is essential for assuring acceptance and effectiveness of the prescribed measures, agricultural agencies are predestined to collect and supply relevant information. Using the state of Sachsen-Anhalt as an example, the communication network between agencies, farmers, the Ministry, farmers' associations and agricultural extension workers is explored. Hierarchical structures and the view that these agencies are purely executive bodies without planning competencies are two factors seriously hamper bottom-up communication.
Αντίστροφη εφοδιαστική αλυσίδα (reverse logistics) - Μελέτη περίπτωσης Re-Battery Α.Ε.
Creators: name: Παπακωνσταντοπούλου, Φωτεινή
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Reverse logistics
subject: Αντίστροφη εφοδιαστική αλυσίδα
subject: Ανακύκλωση
subject: Συσσωρευτές
subject: Αντίστροφη ροή προϊόντων

description: Οι εφοδιαστικές αλυσίδες είναι απόλυτα εξαρτημένες από το προϊόν για το οποίο δημιουργήθηκαν και οργανώθηκαν. Τα ιδιαίτερα χαρακτηριστικά που μπορούν να πάρουν τις καθιστά τελείως διαφορετικές η μία από την άλλη. Οι αντίστροφες εφοδιαστικές αλυσίδες παρουσιάζουν ακόμα μεγαλύτερη διαφορετικότητα ανάλογα από τον σκοπό της επιχείρησης ή οργανισμού που εξυπηρετούν και τις ανάγκες του προϊόντος το οποίο διαχειρίζονται. Η ανακύκλωση και η εναλλακτική διαχείριση εμπορευμάτων όπως οι συσσωρευτές αποτελούν ένα χαρακτηριστικό παράδειγμα μιας τέτοιας αλυσίδας και η μελέτη μιας επιτυχημένης περίπτωσης αποτελεί ιδανικό εργαλείο για την αξιολόγησή τους.
Cost-constrained feature selection in binary classification: adaptations for greedy forward selection and genetic algorithms
Creators: name: Jagdhuber, Rudolf
name: Lang, Michel
name: Stenzl, Arnulf
name: Neuhaus, Jochen
name: Rahnenführer, Jörg
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: Feature cost
subject: Genetic algorithm
subject: Budget constraint
subject: Cost limit
subject: Feature selection
subject: 310
subject: Genetischer Algorithmus
subject: Budgetbeschränkung
subject: Kostenplanung
subject: Merkmalsextraktion

description: Background: With modern methods in biotechnology, the search for biomarkers has advanced to a challenging statistical task exploring high dimensional data sets. Feature selection is a widely researched preprocessing step to handle huge numbers of biomarker candidates and has special importance for the analysis of biomedical data. Such data sets often include many input features not related to the diagnostic or therapeutic target variable. A less researched, but also relevant aspect for medical applications are costs of different biomarker candidates. These costs are often financial costs, but can also refer to other aspects, for example the decision between a painful biopsy marker and a simple urine test. In this paper, we propose extensions to two feature selection methods to control the total amount of such costs: greedy forward selection and genetic algorithms. In comprehensive simulation studies of binary classification tasks, we compare the predictive performance, the run-time and the detection rate of relevant features for the new proposed methods and five baseline alternatives to handle budget constraints. Results: In simulations with a predefined budget constraint, our proposed methods outperform the baseline alternatives, with just minor differences between them. Only in the scenario without an actual budget constraint, our adapted greedy forward selection approach showed a clear drop in performance compared to the other methods. However, introducing a hyperparameter to adapt the benefit-cost trade-off in this method could overcome this weakness. Conclusions: In feature cost scenarios, where a total budget has to be met, common feature selection algorithms are often not suitable to identify well performing subsets for a modelling task. Adaptations of these algorithms such as the ones proposed in this paper can help to tackle this problem.
description: BMC bioinformatics;21
Regionale Vernetzungen in der Landwirtschaft Beitrage eines teilprojektubergreifenden regionalen Workshops am 13.01.2005 in Bad Liebenwerda (Landkreis Elbe-Elster)
Creators: name: Dannenberg, Peter
name: Schleyer, Christian
name: Wustemann, Henry
name: Dannenberg, Peter
name: Schleyer, Christian
name: Wustemann, Henry
Publisher: name: Unknown
Year: 2005
Subjects: subject: Institutional and Behavioral Economics
subject: Resource /Energy Economics and Policy
subject: Spatial Networks
subject: Multifunctionality
subject: Water Management

description: The Working Paper compiles three contributions of a regional workshop on "Regional Networks in Agriculture" jointly organized by three subprojects of the DFG-Research Group SUTRA. The workshop took place on January 13, 2005 in Bad Liebenwerda in the district (Landkreis) Elbe-Elster in the German federal state of Brandenburg assembling 60 farmers and other regional stakeholders. The objective was to present the respective research projects and to discuss first results. The Working Paper highlights the commonalities of the three subprojects with regard to content, research region, and methodological approach. Thus, it also documents the subprojects' past, current, and future co-operation. Peter Dannenberg (subproject 4) deals with types and spatial characteristics of regional networks in agriculture. Henry Wustemann's (subproject 3) focus is on the willingness and ability of agricultural firms in Elbe-Elster to carry out multifunctional activities. Finally, Christian Schleyer (subproject 8) looks at institutional changes of water management systems in reclaimed fen land regions, in particular, in the Schraden region in the south of Elbe-Elster.
The geometry of a naked singularity created by standing waves near a Schwarzschild horizon, and its application to the binary black hole problem
Creators: name: Mandel, Ilya
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The most promising way to compute the gravitational waves emitted by binary black holes (BBHs) in their last dozen orbits, where post-Newtonian techniques fail, is a quasistationary approximation introduced by Detweiler and being pursued by Price and others. In this approximation the outgoing gravitational waves at infinity and downgoing gravitational waves at the holes' horizons are replaced by standing waves so as to guarantee that the spacetime has a helical Killing vector field. Because the horizon generators will not, in general, be tidally locked to the holes' orbital motion, the standing waves will destroy the horizons, converting the black holes into naked singularities that resemble black holes down to near the horizon radius. This paper uses a spherically symmetric, scalar-field model problem to explore in detail the following BBH issues: (i) The destruction of a horizon by the standing waves. (ii) The accuracy with which the resulting naked singularity resembles a black hole. (iii) The conversion of the standing-wave spacetime (with a destroyed horizon) into a spacetime with downgoing waves by the addition of a ``radiation-reaction field''. (iv) The accuracy with which the resulting downgoing waves agree with the downgoing waves of a true black-hole spacetime (with horizon). The model problem used to study these issues consists of a Schwarzschild black hole endowed with spherical standing waves of a scalar field. It is found that the spacetime metric of the singular, standing-wave spacetime, and its radiation-reaction-field-constructed downgoing waves are quite close to those for a Schwarzschild black hole with downgoing waves -- sufficiently close to make the BBH quasistationary approximation look promising for non-tidally-locked black holes.
description: 12 pages, 6 figures
EU-Migration in the Context of Liberalizing Agricultural Markets
Creators: name: Brockmeier, Martina
name: Kurzweil, Marianne
name: Brockmeier, Martina
name: Kurzweil, Marianne
Publisher: name: Unknown
Year: 2004
Subjects: subject: Labor and Human Capital
subject: Migration
subject: EU Eastern enlargement
subject: GTAP

description: In the last decades migration has become an increasingly regarded topic in economic research in line with the growth of the world's migrant population which more than doubled in the 1960s and 1990s (ILO 2002). Particularly now - in the light of the forthcoming EU Eastern enlargement with 10 middle and eastern European countries accessing the Union - migration gains importance in research even more. With respect to these future developments several studies have been carried out analyzing various issues, like migration incentives or future migration flows in an enlarged EU. Regarding the forthcoming heavy adjustments of Eastern agriculture to the EU's CAP strong impacts not only on agriculture but also on the labor markets will occur. In order to reflect the economic developments in the candidate as well as in the current EU member countries as realistic as possible the simulations carried out in this paper comprise a very detailed modeling of the agricultural market and furthermore incorporate migration flows. The purpose of the different simulations is to point out the relevance of migration issues in the course of regional integration and its influence on the different production sectors.
Η σύγχρονη ισορροπία ισχύος στην παγκόσμια πολιτική οικονομία
Creators: name: Μπακομήτρου, Ιωάννα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ισορροπία ισχύος
subject: Παγκόσμια πολιτική οικονομία
subject: Διεθνείς σχέσεις

description: Ο σκοπός της διπλωματικής εργασίας είναι η ανάδειξη των αιτιών που διαμορφώνουν τη σύγχρονη ισορροπία ισχύος στην παγκόσμια πολιτική οικονομία όπως αυτή σχηματίστηκε σταδιακά από το 1990 και έπειτα, καθιστώντας την Κίνα πια το αντίπαλο δέος των ΗΠΑ.
Διαχείριση οικοδομικού έργου με χρήση του προγράμματος MS Project
Creators: name: Καμηνιώτη, Φωτεινή
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Διαχείριση έργου
subject: Κατασκευαστικός κλάδος

description: Κατά τη διάρκεια των χρόνων τα έργα γίνονται όλο και πιο πολύπλοκα. Αυτό σημαίνει ότι πρέπει και η διαχείριση των έργων να εξελιχθεί αντίστοιχα, ώστε να καλύπτονται οι ανάγκες και των πιο απαιτητικών έργων και να ολοκληρώνονται με επιτυχία. Η επιτυχής ολοκλήρωση ενός έργου περιλαμβάνει τα κριτήρια του χρόνου, του κόστους και της ποιότητας. Ειδικότερα στον κατασκευαστικό κλάδο η διαχείριση των έργων είναι αναγκαία, καθώς κάθε έργο είναι μοναδικό και εμπλέκονται σε αυτό πολλά αντικρουόμενα μέρη. Οι κατασκευαστικές εταιρείες, σε Ελλάδα και εξωτερικό, πρέπει να είναι σε θέση να διαχειριστούν το έργο, το ανθρώπινο δυναμικό, τον προϋπολογισμό και γενικά όλους τους παράγοντες και τους κινδύνους που επηρεάζουν ένα έργο, δεδομένου ότι αποτελούν έναν από τους βασικότερους πυλώνες της οικονομίας. Σημαντικά εργαλεία στην προσπάθεια αυτή είναι τα διάφορα λογισμικά που οργανώνουν και διευκολύνουν την εργασία αυτή, όπως το MS Project, το Primavera, το Gantter κ.ά. Η παρούσα εργασία μελετά την περίπτωση της ριζικής ανακαίνισης ενός διαμερίσματος, το οποίο προοριζόταν για κύρια κατοικία των ιδιοκτητών, αλλά τελικά αποφάσισαν να το διαθέσουν για βραχυχρόνια μίσθωση μέσω της πλατφόρμας Airbnb. Γενικά τα τελευταία χρόνια παρατηρείται η αυξητική τάση της ανακαίνισης κατοικιών και διάθεσής τους προς βραχυχρόνια μίσθωση. Ειδικά στην Ελλάδα, όπου το ποσοστό ιδιοκτησίας είναι υψηλό ακόμα και σε περισσότερες από μία ιδιοκτησίες, η επιλογή αυτή αποτελεί έναν εύκολο τρόπο αύξησης του εισοδήματος. Για το εν λόγω ακίνητο έγινε χρήση του προγράμματος MS Project, για τη σύνταξη του χρονικού προγραμματισμού. Συμπερασματικά οι ριζικές ανακαινίσεις συχνά αποκλίνουν του χρονοδιαγράμματος, λόγω των απρόβλεπτων τεχνικών προβλημάτων που ανακύπτουν. Ένας άλλος παράγοντας καθυστέρησης ολοκλήρωσης του συγκεκριμένου έργου ήταν η επιβολή των capital controls κατά τη διάρκεια της κατασκευής.
Communication Processes in Agro-environmental Policy Development and Decision-Making: Case Study Sachsen-Anhalt
Creators: name: Prager, Katrin
name: Nagel, Uwe Jens
name: Prager, Katrin
name: Nagel, Uwe Jens
Publisher: name: Unknown
Year: 2004
Subjects: subject: Environmental Economics and Policy
subject: communication processes
subject: agro-environmental programmes
subject: decision-making support
subject: conflict resolution
subject: participation and acceptance
subject: rural areas
subject: agricultural extension
subject: sustainable agriculture
subject: structural change
subject: transformation processes

description: The development of a decision support approach with regard to agro-environmental programmes is part of a larger research project on agricultural transformation and structural change processes. Research objective are improved communication processes and an enhanced quality of political decision-making. The investigation is based on the assumption that the success of agro-environmental programmes depends largely on their acceptance by all major stakeholders. This implies an early integration of varying interests in the decision-making process. Introducing participatory approaches into a bureaucratic setting poses particular problems. In order to achieve greater efficiency and effectiveness, the introduction of interactive modelling approaches has to be coupled with communication processes which increase transparency and allow for consensual decision-making.
Measure of the density of quantum states in information geometry and its application in the quantum multi-parameter estimation
Creators: name: Xing, Haijun
name: Fu, Libin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, there is a growing interest in study quantum mechanics from the information geometry perspective, where a quantum state is depicted with a point in the projective Hilbert space. By taking quantum Fisher information (QFI) as the metric of projective Hilbert spaces, estimating a small parameter shift is equivalent to distinguishing neighboring quantum states along a given curve. Henceforth, information geometry plays a significant role in the single parameter estimation. However, the absence of high dimensional measures limits its applications in studying the multi-parameter systems. In this paper, we will discuss the physical implications of the volume element of QFI. It measures the intrinsic density of quantum states (IDQS) in projective Hilbert spaces, which is, then, a measure to define the (over) completeness relation of a class of quantum states. As an application, IDQS can be used in quantum measurement and multi-parameter estimation. We find the density of distinguishable states (DDS) for a set of efficient estimators is measured by the invariant volume of the classical Fisher information, which is the classical counterpart of QFI and serves as the metric of statistical manifolds. Correspondingly, a determinant form of quantum Cramér-Rao inequality is proposed to quantify the ability to infer the IDQS via quantum measurement. As a result, we find a gap between IDQS and maximal DDS over the measurements. The gap has tight connections with the uncertainty relationship. Exemplified with the three-level system with two parameters, we find the maximal DDS attained via the \emph{vertex measurements} (MvDDS) equals the square root of the quantum geometric tensor's determinant. It indicates the square gap between IDQS and MvDDS is proportional to the square of Berry curvature.
description: 13 pages, 3 figures
Interferon-inducible protein (IFI) 16 regulates Chikungunya and Zika virus infection in human skin fibroblasts
Creators: name: Wichit, Sineewanlaya
name: Hamel, Rodolphe
name: Yainoy, Sakda
name: Gumpangseth, Nuttamonpat
name: Panich, Suchawadee
name: Phuadraksa, Thanawat
name: Saetear, Phoonthawee
name: Monteil, Arnaud
name: Morales Vargas, Ronald
name: Missé, Dorothée
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Chikungunya virus
subject: Zika virus
subject: IFI16
subject: Human skin fibroblasts
subject: Antiviral
subject: 610

description: Chikungunya virus (CHIKV), a re-emerging infectious arbovirus, causes Chikungunya fever that is characterized by fever, skin rash, joint pain, arthralgia and occasionally death. Despite it has been described for 66 years already, neither potential vaccine nor a specific drug is available yet. During CHIKV infection, interferon type I signaling pathway is stimulated and releases hundreds of interferon stimulated genes (ISGs). Our previous study reported that IFI16, a member of ISGs, is up-regulated during CHIKV virus infection and the suppression of the gene resulted in increased virus replication. Furthermore, our group also found that inflammasome activation can inhibit CHIKV infection in human foreskin cells (HFF1). Concomitantly, it has been reported that IFI16 activates the inflammasome to suppress virus infection. Therefore, we have hypothesized that IFI16 could be involved in CHIKV infection. In this study, we confirmed the expression level of IFI16 by Western blotting analysis and found that IFI16 was up-regulated following CHIKV infection in both HFF1 and human embryonic kidney cells. We next investigated its antiviral activity and found that forced expression of IFI16 completely restricted CHIKV infection while endogenous silencing of the gene markedly increased virus replication. Furthermore, we have dis- covered that IFI16 inhibited CHIKV replication, at least, in cell-to-cell transmission as well as the diffusion step. Interestingly, IFI16 also exerted its antiviral activity against Zika virus (ZIKV) infection, the global threat re- emerging virus can cause microcephaly in humans. Taken together, this study provides the first evidence of an antivirus activity of IFI16 during in vitro arbovirus infection, thus expanding its antiviral spectrum that paves the way to further development of antiviral drugs and vaccines.
description: EXCLI Journal;Vol. 18 2019
Ο ρόλος των τεχνολογιών πληροφορίας και επικοινωνίας στην ανάπτυξη δεξιοτήτων στην Ειδική Αγωγή: ευρωπαϊκές και διεθνείς πρακτικές
Creators: name: Νικολοπούλου, Ηλιάνα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ειδική αγωγή
subject: Τεχνολογίες Πληροφοριών και Επικοινωνίας (ΤΠΕ)
subject: Ευρωπαϊκές πρακτικές
subject: Διεθνείς πρακτικές

description: Στον 21ο αιώνα οι τεχνολογίες πληροφορίας και επικοινωνίας κατακλύζουν την καθημερινότητά μας. Ταυτόχρονα, οι απαιτήσεις και οι προκλήσεις της εποχής απαιτούν την ανάπτυξη και κατάκτηση καίριων δεξιοτήτων. Οι νέες τεχνολογίες δύνανται να δράσουν πολυεπίπεδα μέσα από τον χώρο της εκπαίδευσης, της εργασίας και της καθημερινής ζωής προκειμένου να συμβάλλουν στην δημιουργία ενός πληθυσμού που θα κατέχει όλες τις απαραίτητες δεξιότητες. Στις ιδιαίτερες αυτές απαιτήσεις οφείλουν να μπορούν να ανταποκριθούν και τα άτομα με ειδικές εκπαιδευτικές ανάγκες και ικανότητες αναπτύσσοντας επαρκώς τις δεξιότητες που χρειάζονται, ώστε να μετέχουν ως ισότιμα μέλη στην κοινωνία, να διεκδικούν και να πετυχαίνουν τους στόχους τους. Οι νέες τεχνολογίες τόσο σε εθνικό όσο σε ευρωπαϊκό και διεθνές επίπεδο φαίνεται πως μπορούν να προσφέρουν την ευκαιρία κατάκτησης πληθώρας δεξιοτήτων με την χρήση εκπαιδευτικών λογισμικών, φορητών συσκευών, τεχνητής νοημοσύνης, ρομποτικής, ειδικά διαμορφωμένων ψηφιακών δικτύων και εικονικών περιβαλλόντων παρέχοντας έτσι μια νέα καινοτόμο λύση για το παρόν ζήτημα.
Entscheidungsunterstutzung bei der Gestaltung von Agrarumwelt-programmen: Ein Interaktiver, PC-Gestutzter Programmierungs-ansatz fur Sachsen-Anhalt
Creators: name: Kirschke, Dieter
name: Daenecke, Ernst
name: Hager, Astrid
name: Kastner, Kerstin
name: Jechlitschka, Kurt
name: Wegener, Stefan
name: Kirschke, Dieter
name: Daenecke, Ernst
name: Hager, Astrid
name: Kastner, Kerstin
name: Jechlitschka, Kurt
name: Wegener, Stefan
Publisher: name: Unknown
Year: 2004
Subjects: subject: Environmental Economics and Policy
subject: Agri-environmental policy
subject: agri-environmental programmes
subject: decision-making support
subject: linear programming
subject: policy consulting
subject: priority setting
subject: Saxony-Anhalt

description: The increasing importance of measures under the so called "second pillar" of the Common Agricultural Policy of the European Union raises new challenges to decision-makers. The definition and operationalisation of goals as well as the implementation of concrete measures is a complex task. Decisions have to be made on priorities for goals and measures and finally on the allocation of the budget. In this article we demonstrate how policy-making in complex systems can be supported by co-operation between scientists, policy-makers and administrators. Using a participatory computer-aided programming approach the case of improving the agri-environmental programme of Saxony-Anhalt is examined. Based on interactive simulations together with stakeholders and considering the several determinants (like the level of co-financing, budget volumes and other restrictions for priority setting) the approach can substantially contribute to political strategy development.
Optical wireless hybrid networks for 5G and beyond communications
Creators: name: Chowdhury, Mostafa Zaman
name: Hasan, Moh Khalid
name: Shahjalal, Md
name: Hossan, Md Tanvir
name: Jang, Yeong Min
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The next 5 th generation (5G) and above ultra-high speed, ultra-low latency, and extremely high reliable communication systems will consist of heterogeneous networks. These heterogeneous networks will consist not only radio frequency (RF) based systems but also optical wireless based systems. Hybrid architectures among different networks is an excellent approach for achieving the required level of service quality. In this paper, we provide the opportunities bring by hybrid systems considering RF as well as optical wireless based communication technologies. We also discuss about the key research direction of hybrid network systems.
description: 2018 International Conference on Information and Communication Technology Convergence (ICTC)