cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Die Felsgesteinartefakte des bandkeramischen Fundplatzes Aldenhoven 3
Creators: name: Schön, Werner
Publisher: name: University Library Heidelberg
Year: 2013

description: Dieser Beitrag enthält eine kurze Auswertung der Felsgesteinartefakte der bandkeramischen Siedlung Aldenhoven 3 im Rheinland. Das Material hatte man seit 1959 bei Baumaßnahmen und während einer Grabung in den Jahren 1976/77 geborgen. Bei der vorliegenden Auswertung wurde vor allem auf Umarbeitung und Mehrfachnutzung geachtet. Einen weiteren Schwerpunkt stellen die Mahlsteinfragmente dar. Auffällig ist, daß sich der größte Teil davon als Läufersteine bestimmen ließ, während Mahlstein-Unterlieger nur mit wenigen recht kleinen Stücken vorkommen. Zum Vergleich werden Daten von weiteren bandkeramischen und von Rössener Fundplätzen des Rheinlandes herangezogen.
description: This essay presents a short summary of the analysis of rockstone-artefacts from the LBK-settlement of Aldenhoven 3. The material has been collected during building-activities since 1959 and an excavation in 1976/77. Focus of the presented examination is the multiple use and the reworking of the artefacts. Remarkable is the great number of upper grinding stones. Querns are rare and heavy fragmented. The assemblage is compared with data from further LBK-sites and Rössen-settlements in the Rhineland.
From kinetic to collective behavior in thermal transport on semiconductors and semiconductor nanostructures
Creators: name: de Tomas, C.
name: Cantarero, A.
name: Lopeandia, A. F.
name: Alvarez, F. X.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a model which deepens into the role that normal scattering has on the thermal conductivity in semiconductor bulk, micro and nanoscale samples. Thermal conductivity as a function of the temperature undergoes a smooth transition from a kinetic to a collective regime that depends on the importance of normal scattering events. We demonstrate that in this transition, the key point to fit experimental data is changing the way to perform the average on the scattering rates. We apply the model to bulk Si with different isotopic compositions obtaining an accurate fit. Then we calculate the thermal conductivity of Si thin films and nanowires by only introducing the effective size as additional parameter. The model provides a better prediction of the thermal conductivity behavior valid for all temperatures and sizes above 30 nm with a single expression. Avoiding the introduction of confinement or quantum effects, the model permits to establish the limit of classical theories in the study of the thermal conductivity in nanoscopic systems.
Towards the dynamical study of heavy-flavor quarks in the Quark-Gluon-Plasma
Creators: name: Berrehrah, H.
name: Bratkovskaya, E.
name: Cassing, W.
name: Gossiaux, P. B.
name: Aichelin, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the aim of a dynamical study of on- and off-shell heavy quarks Q in the quark gluon plasma (QGP) - as produced in relativistic nucleus-nucleus collisions - we study the heavy quark collisional scattering on partons of the QGP. The elastic cross sections $σ_{q,g-Q}$ are evaluated for perturbative partons (massless on-shell particles) and for dynamical quasi-particles (massive off-shell particles as described by the dynamical quasi-particles model "DQPM") using the leading order Born diagrams. We demonstrate that the finite width of the quasi-particles in the DQPM has little influence on the cross sections $σ_{q,g-Q}$ except close to thresholds. We, furthermore, calculate the heavy quark relaxation time as a function of temperature T within the different approaches using these cross sections.
description: 4 pages, 5 figures, International Conference on Strangeness in Quark Matter 2013 (SQM 2013)
title: Matthias Jung: „Heimathirsche“. Hobbyarchäologen zwischen Hedonismus und Professionalisierung, 2010
Creators: name: Samida, Stefanie
Publisher: name: University Library Heidelberg
Year: 2013

description: Rezension zu: Matthias Jung: „Heimathirsche“. Hobbyarchäologen zwischen Hedonismus und Professionalisierung. Internationale Hochschulschriften 541. Waxmann Verlag, Münster, New York, München, Berlin 2010. 352 Seiten, roschiert, 37,90 €. ISBN 978-3-8309-2292-6.
Slides for the Workshop Reforming Academic Career Assessment: Current insights and future directions (25 June 2024)
Creators: name: CoARA Working Group ACA
name: Morais, Rita
name: Martínez Samper, Pastora
name: Tromp, Moniek
Publisher: name: Zenodo
Year: 2024
Subjects: CoARA
Careers
Academic assessment
rewards
recognition
research assessment

description: Presentations at the workshop conducted by the CoARA Working Group ACA on "Reforming Academic Career Assessment: Current insights and future directions", on 25 June 2024.

The slides include the inital results of the case studies and survey conducted by the CoARA Working Group ACA.

A recording of the workshop is available at: https://www.youtube.com/watch?v=4OlOF0bFSVU
Solving the Strong CP Problem with Discrete Symmetries and the Right Unitarity Triangle
Creators: name: Antusch, Stefan
name: Holthausen, Martin
name: Schmidt, Michael A.
name: Spinrath, Martin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a solution to the strong CP problem based on spontaneous CP violation and discrete family symmetries. The model predicts in a natural way the almost right-angled quark unitarity triangle angle ($α\simeq 90^\circ$) by making the entries of the quark mass matrices either real or imaginary. By this choice the determinants of the mass matrices are rendered real and hence the strong CP phase vanishes. We present a toy model for the quark sector that demonstrates the viability of our approach.
description: 20 pages, 4 figures; v2: references added, minor changes, version published in NPB
title: Bryan Ward-Perkins, Der Untergang des römischen Reiches und das Ende der Zivilisation.
Creators: name: Kaszab-Olschewski, Tünde
Publisher: name: University Library Heidelberg
Year: 2013

description: Rezension zu: Bryan Ward-Perkins, Der Untergang des römischen Reiches und das Ende der Zivilisation. Aus dem Englischen von Nina Valenzuela Montenegro. Theiss Verlag Stuttgart 2007, Lizenzausgabe der WBG, 240 S., 34 Abb., geb., 29,90 Euro. ISBN 978-3-8062-2083-4
Comparison between the gut bacterial community of laboratory cultured and wild Daphnia
Creators: name: Houwenhuyse, Shira
Publisher: name: Zenodo
Year: 2023

description: The fitness of an organism is often impacted by the composition and biological activity of its associated microbial community (i.e., the microbiota). Many factors, including host genetics, diet, temperature and chemicals, can influence the microbial community composition. Furthermore, these factors can differ strongly between natural and laboratory environments. Consequently, several studies have highlighted results from laboratory experiments investigating host-associated microbiota to be conflicting with those obtained under field conditions. Here, we compared the Daphnia magna gut bacterial communities in natural host populations with those of laboratory cultured hosts. We further analyzed changes in the gut microbiota after transferring hosts from natural populations to the laboratory on the short- and long-term. Results show that, in general, the gut microbiota from natural populations differ from those of laboratory cultures and that their composition and diversity changed one hour after being transferred to the laboratory. However, over the following 14 days the composition and diversity remained relatively stable. On the longer term, however, namely after two years of rearing hosts in the laboratory, the composition and diversity of the gut microbiota was strongly altered compared to the initial state. Our findings indicate that the gut microbiota of Daphnia magna in laboratory experiments is only partly representative for natural field conditions, and that caution should be taken when interpreting results from laboratory experiments for natural settings.
title: Untersuchungen zur Lagerplatzstruktur und chronologischen Stellung einer mesolithischen Freilandfundstelle im westfälischen Oelde
Creators: name: Arndt, Dennis
Publisher: name: University Library Heidelberg
Year: 2013

description: Im Rahmen einer Magisterarbeit wurde eines der Feuersteininventare der mesolithischen Freilandfundstelle Oelde-Weitkamp im östlichen Münsterland wissenschaftlich ausgewertet. Der inhaltliche Schwerpunkt lag dabei auf der Untersuchung der Lagerplatzstruktur sowie der chronologischen Stellung des Inventars. Das Ergebnis der typochronologischen Einordnung des Mikrolithenspektrums mit Hilfe einer Korrespondenzanalyse in die Zeit des Übergangs vom 9. zum 8. vorchristlichen Jahrtausend konnte über die AMS-Datierung einer verkohlten Haselnussschale verifiziert werden. Die Untersuchung der Lagerplatzstruktur sowie der internen Siedlungsplatzdynamik unter Einbeziehung der Auswertungsergebnisse des Fundmaterials, konnte darüber hinaus den funktionalen Kontext der Fundstelle offenlegen: Demnach muss zum gegenwärtigen Zeitpunkt davon ausgegangen werden, dass sich im Fundniederschlag das Resultat mehrerer, kurzfristiger Siedlungsereignisse widerspiegelt, die der Nahrungsbeschaffung dienten, um ein im näheren Umfeld gelegenes Basislager zu versorgen.
description: As part of a master’s thesis one of the Mesolithic flint inventories of the open air site Oelde-Weitkamp, in the eastern Münsterland, was scientifically evaluated. The emphasis of the research was placed on the analysis of the intrasite spatial patterning and the chronologically positioning of the inventory. The AMS dating of a charred hazelnut shell verified the result of the typochronological classification regarding the sequence of microliths via a correspondence analysis, which was dated to the period around 8000 BC.
The functional context of the site was revealed by the investigation of the encampment`s structure as well as the intrasite dynamics, including the interpretation`s results of the site`s findings. As the present stage we must assume that, considering these results, the find scatter represents multiple, short-term occurrences of settlement. These settlements were used to obtain aliments to supply a more distant base camp.
Symmetric Representation Rings are $λ$-Rings
Creators: name: Zibrowius, Marcus
Publisher: name: arXiv
Year: 2013
Subjects: subject: K-Theory and Homology (math.KT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20G05, 18F25

description: The representation ring of an affine algebraic group scheme can be endowed with the structure of a (special) $λ$-ring. We show that the same is true for the ring of symmetric representations, i.e. for the Grothendieck-Witt ring of the representation category, for any affine algebraic group scheme over a field of characteristic not two.
description: 36 pages. Some changes of notation
title: Die Germanen sind wieder da: Archäologische, didaktische und gesellschaftspolitische Perspektiven auf ein altes Thema in neuen Lehrwerken
Creators: name: Sénécheau, Miriam
Publisher: name: University Library Heidelberg
Year: 2013

description: Die Germanen der römischen Kaiserzeit erfahren in jüngeren deutschen Schulbüchern für die Sekundarstufe I wie auch in den ihnen zu Grunde liegenden aktuellen Lehrplänen im Vergleich zu früheren Jahren wieder eine verstärkte Berücksichtigung. Der Beitrag ist der Frage gewidmet, welche gesellschaftspolitischen Ausgangssituationen und didaktischen bzw. bildungspolitischen Überlegungen diese Tendenz fördern, und wie sich diese in gegenwärtigen Germanendarstellungen spiegeln. Anhand konkreter Beispiele aus neuen Lehrwerken wird darüber hinaus deutlich gemacht, dass neben einigen inhaltlichen Neuerungen vieles in Darstellungstraditionen verharrt, die der Forschungsgeschichte des 19. und 20. Jahrhunderts geschuldet sind.
description: The Teutons/Germanic Tribes of the Roman Empire period have lately received increased attention in recent German schoolbooks for the secondary level 1 as well as in the current curricula on which they are based, when compared with earlier years. This contribution addresses the question of which socio-political initial situations and didactic or education-political considerations encourage this tendency and how they are reflected in the modern portrayal of the Teutons. Furthermore, using concrete examples, it will be shown that despite some innovations with regard to content, many of the traditional depictions persist, owing to the historical research of the 19th and 20th centuries.
Essential plasticity and redundancy of metabolism unveiled by synthetic lethality analysis
Creators: name: Güell, Oriol
name: Sagués, Francesc
name: Serrano, M. Ángeles
Publisher: name: arXiv
Year: 2013
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: We unravel how functional plasticity and redundancy are essential mechanisms underlying the ability to survive of metabolic networks. We perform an exhaustive computational screening of synthetic lethal reaction pairs in Escherichia coli in a minimal medium and we find that synthetic lethal pairs divide in two different groups depending on whether the synthetic lethal interaction works as a backup or as a parallel use mechanism, the first corresponding to essential plasticity and the second to essential redundancy. In E. coli, the analysis of pathways entanglement through essential redundancy supports the view that synthetic lethality affects preferentially a single function or pathway. In contrast, essential plasticity, the dominant class, tends to be inter-pathway but strongly localized and unveils Cell Envelope Biosynthesis as an essential backup for Membrane Lipid Metabolism. When comparing E. coli and Mycoplasma pneumoniae, we find that the metabolic networks of the two organisms exhibit a large difference in the relative importance of plasticity and redundancy which is consistent with the conjecture that plasticity is a sophisticated mechanism that requires a complex organization. Finally, coessential reaction pairs are explored in different environmental conditions to uncover the interplay between the two mechanisms. We find that synthetic lethal interactions and their classification in plasticity and redundancy are basically insensitive to medium composition, and are highly conserved even when the environment is enriched with nonessential compounds or overconstrained to decrease maximum biomass formation.
description: 22 pages, 4 figures
FATTORI PREDITTIVI DI RISPOSTA VIROLOGICA SOSTENUTA IN PAZIENTI CON COINFEZIONE HIV-HCV TRATTATI CON PEG-INTERFERONE E RIBAVIRINA
Creators: name: UGLIETTI, ALESSIA
Publisher: name: Universit� degli Studi di Milano
Year: 2014

description: Hepatitis C is a blood-borne infection caused by the hepatitis C virus (HCV). A chronic infection, which develops in most infected subjects, may lead to liver cirrhosis with ensuing liver dysfunction and liver cancer. About 30% of HIV-positive patients are coifected with HCV. The standard of care in HIV-HCV-coinfected subjects was a combination of pegylated interferon (peg-IFN)-alpha and ribavirin for 48 weeks until few months ago. The eradication of HCV was obtained in 20-55% of cases albeit with significant side effects. Further understanding of host factors that determine the effectiveness of treatment may provide diagnostic tools to distinguish patients who will be cured from those in whom treatment is likely to be futile. The aim of this thesis was to identify biomarkers and some conditions to predict outcome of combination therapy in HIV-HCV-infected patients. The parameters studied included microbial translocation markers as sCD14 and LPS, immune activation profile as CD8+CD38+, CD4+/CD8+ ratio, and in added a HAART intensification with CCR5 inhibitors, maraviroc. We showed that in HIV-HCV patients sCD14 correlates with the severity of liver disease and predicts early response to peg-IFN-apha/ribavirin. Moreover, during anti-HCV therapy there is a higher immune activation by CD8+CD38+ increasing. This data could be a major factor for outcome above all in the first phases of therapy. In conclusion, we evaluated that HAART intensification with maraviroc Per concludere si � valutato come l?intensificazione della terapia HAART con maraviroc could increase T CD4+ recovery and translate in higher probability of sustained virological response in immunological non responder subjects.
IMPLEMENTATION OF SEMICLASSICAL THEORIES FOR SPECTROSCOPY
Creators: name: GABAS, FABIO
Publisher: name: Universit� degli Studi di Milano
Year: 2019

description: Vibrational spectroscopy is a fundamental tool for detecting and understanding the structure of molecular systems. Alongside the experimental measures, theoretical methods have been always employed to interpret and understand vibrational spectra. The semiclassical approach has demonstrated its reliability in the field, especially by means of the recent ?Multiple Coherent? and ?Divide and Conquer? formulations. In this PhD thesis the implementation and application of these modern techniques to a variety of molecular systems are presented, ranging from isolated medium size molecules to complex supramolecular systems, up to more than one hundred degrees of freedom. In particular the vibrational features of glycine, deoxyguanosine, a small dipeptide and glycine-based supramolecular systems are illustrated and discussed. A final Section is dedicated to the possibility to employ the Amber94 classical molecular force field, for computationally cheaper semiclassical calculations. This work demonstrates and highlights the validity and accuracy of semiclassical methods as theoretical spectroscopicy tools by successfully detecting quantum effects in medium size systems, whereas other formulations fail.
LA VALUTAZIONE AMBIENTALE STRATEGICA NEL SISTEMA DELLA PIANIFICAZIONE TERRITORIALE
Creators: name: CARUCCIO, LORENZO SILVIO
Publisher: name: Universit� degli Studi di Milano
Year: 2015

description: The thesis analyses the main issues posed by the implementation of Strategic Environmental Assessment (SEA) within the Italian physical planning system in the perspective of sustainable development principle, as elaborated in the supranational and European context. The proper implementation of the European Directive 2001/42CE in the national legal framework has revealed problematic as regards the definition of its scope and, specifically, the procedural patterns to be followed and guaranteed in order to ensure an high level of environmental protection in planning processes through early and effective integration of sustainability objectives in public decision-making. After more than ten years since Directive 2001/42CE adoption, sensitive issues still remain to be addressed in order to assess the effectiveness of the implementation both at legislative and administrative level. Taken previously into account the contents and main critical aspects of planning traditional discipline and practice, yet to be reformed at national level, the research work attempts to highlight the pre-conditions to be fulfilled for SEA proper implementation and the need of institutional adaptation of planning instruments and their relationships, in accordance with environmental systems complexities.
Reforming Academic Career Assessment - Webinar by the CoARA Working Group ACA 4 March 2024
Creators: name: CoARA Working Group ACA
Publisher: name: Zenodo
Year: 2024
Subjects: CoARA
Careers
Reward
Recognition
Academic careers
research assessment

description: Presentation used by the CoARA Working Group on Reforming Academic Career Assessment (ACA) on its first webinar on 4 March 2024.

This presentation includes the WG ACA objectives and workplan, as well as a brief description of the survey conducted by this working group in winter/spring 2024.

A recording of the webinar is available at: https://www.youtube.com/watch?v=5KwMFdAKlkM&t=506s
Stochastic Parameterization of Column Physics using Generative Adversarial Networks
Creators: name: Nadiga, B. T.
name: Sun, X.
name: Nash, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We demonstrate the use of a probabilistic machine learning technique to develop stochastic parameterizations of atmospheric column-physics. After suitable preprocessing of NASA's Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA2) data to minimize the effects of high-frequency, high-wavenumber component of MERRA2 estimate of vertical velocity, we use generative adversarial networks to learn the probability distribution of vertical profiles of diabatic sources conditioned on vertical profiles of temperature and humidity. This may be viewed as an improvement over previous similar but deterministic approaches that seek to alleviate both, shortcomings of human-designed physics parameterizations, and the computational demand of the "physics" step in climate models.
description: 9 pages, 3 figures
Online Appendix for leadership.docx
Creators: name: Liu, Yu
name: Zhang, Kaiping
name: Zhu, Meng
name: Wu, Wenquan
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440803
subject: Comparative government and politics

description: Various perspectives have been explored to explain regime changes under authoritarianism. Yet the role of autocrats-“the elephant in the room”-remains largely unexamined in large-N studies. This study addresses this gap by employing the Randomization Inference method that reshuffles historical leadership as counterfactuals. Covering 150 countries from 1946 to 2020, we find strong evidence that leaders significantly contribute to the variance in regime changes, and autocrats exert substantially more influences compared to democratic leaders. These influences extend in both authoritarian and democratic directions, with the latter being more pronounced. Our analysis further reveals that certain conditions, such as poverty and inequality, also mediate leaders’ ability to shape regimes. By “bringing leaders back in,” our study bridges the gap between conditionist and agency perspectives in understanding regime changes. It not only presents compelling evidence of autocrats’ role in democratization or authoritarian deepening but also quantifies this role systematically.
A differential equation for polynomials related to the Jacobian conjecture
Creators: name: Valqui, Christian
name: Guccione, Jorge Alberto
name: Guccione, Juan José
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We analyze a possible minimal counterexample to the Jacobian Conjecture $P,Q$ with $\gcd(deg(P),deg(Q))=16$ and show that its existence depends only on the existence of solutions for a certain Abel differential equation of the second kind.
description: Update on the reference [1], some minor typing errors, journal reference
Revisiting the spread spectrum effect in radio interferometric imaging: a sparse variant of the w-projection algorithm
Creators: name: Wolz, L.
name: McEwen, J. D.
name: Abdalla, F. B.
name: Carrillo, R. E.
name: Wiaux, Y.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Next-generation radio interferometric telescopes will exhibit non-coplanar baseline configurations and wide field-of-views, inducing a w-modulation of the sky image, which in turn induces the spread spectrum effect. We revisit the impact of this effect on imaging quality and study a new algorithmic strategy to deal with the associated operator in the image reconstruction process. In previous studies it has been shown that image recovery in the framework of compressed sensing is improved due to the spread spectrum effect, where the w-modulation can act to increase the incoherence between measurement and sparsifying signal representations. For the purpose of computational efficiency, idealised experiments were performed, where only a constant baseline component w in the pointing direction of the telescope was considered. We extend this analysis to the more realistic setting where the w-component varies for each visibility measurement. Firstly, incorporating varying w-components into imaging algorithms is a computational demanding task. We propose a variant of the w-projection algorithm for this purpose, which is based on an adaptive sparsification procedure, and incorporate it in compressed sensing imaging methods. This sparse matrix variant of the w-projection algorithm is generic and adapts to the support of each kernel. Consequently, it is applicable for all types of direction-dependent effects. Secondly, we show that for w-modulation with varying w-components, reconstruction quality is significantly improved compared to the setting where there is no w-modulation (i.e. w=0), reaching levels comparable to the quality of a constant, maximal w-component. This finding confirms that one may seek to optimise future telescope configurations to promote large w-components, thus enhancing the spread spectrum effect and consequently the fidelity of image reconstruction.
description: 12 pages, 9 figures
A Model of Teneral Dehydration in Glossina
Creators: name: Childs, S. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: The results of a long-established investigation into teneral transpiration are used as a rudimentary data set. These data are not complete in that all are at 25 $^\circ\mathrm{C}$ and the temperature-dependence cannot, therefore be resolved. An allowance is, nonetheless, made for the outstanding temperature-dependent data. The data are generalised to all humidities, levels of activity and, in theory, temperatures, by invoking the property of multiplicative separability. In this way a formulation, which is a very simple, first order, ordinary differential equation, is devised. The model is extended to include a variety of Glossina species by resorting to their relative, resting water loss rates in dry air. The calculated, total water loss is converted to the relevant humidity, at 24 $^\circ\mathrm{C}$, that which produced an equivalent water loss in the pupa, in order to exploit an adaption of an established survival relationship. The resulting computational model calculates total, teneral water loss, consequent mortality and adult recruitment. Surprisingly, the postulated race against time, to feed, applies more to the mesophilic and xerophilic species, in that increasing order. So much so that it is reasonable to conclude that, should Glossina brevipalpis survive the pupal phase, it will almost certainly survive to locate a host, without there being any significant prospect of death from dehydration. With the conclusion of this work comes the revelation that the classification of species as hygrophilic, mesophilic and xerophilic is largely true only in so much as their third and fourth instars are and, possibly, the hours shortly before eclosion.
description: 28 pages, 9 figures, 3 tables
ESSAYS IN HEALTH ECONOMICS:EVIDENCES FROM ITALY
Creators: name: RIGANTI, ANDREA
Publisher: name: Universit� degli Studi di Milano
Year: 2017

description: This thesis is an attempt to contribute to Italian literature on health economics in causal framework. Despite the increasing awareness of ruling class that is time to enforce the National Health System to achieve higher efficiency levels and to make the public system bearable, there are few contributions in scientific literature that study Italian context, maybe due to scarce availability of data. This thesis deals with two big concerns for public regulators: cost-containment policies and waiting times for elective surgeries. The first part regards cost-containment policies and the introduction of unified authorities responsible for purchases of goods and provision of services at local level. The aim of the first part is to measure the efficacy of these new authorities in terms of costs reduction. The straightforward policy implication is that if the unification of local health authorities can help administrations to perform scale economies, this would be a successful stimulus to other administrations to adopt the same hint and therefore create a virtuous cycle. The second chapter refers to waiting times for elective surgeries, especially their relation with the combination of capacity constraints, demand for and supply of elective treatments. From a policy perspective, it is critical to establish the extent to which demand and supply respond to waiting time. For example, if demand is highly elastic, an exogenous increase in supply will only have minimal effect in reducing waiting times. In turn, this will make policymakers more reluctant to fund additional resources. Similarly, if supply is elastic, an exogenous increase in demand will imply that waiting time will increase only to a small extent. In both chapters we use public and free administrative data and widely known econometric approaches (Instrumental Variable regression and Synthetic Control) to try to establish causal relations between important factors in healthcare sector and try to fill the gap between literature on Italian health care sector and scientific production concerning other OECD and European Countries. Our findings are emerging at a sufficient extent, especially given the fact that we are not aware of many other studies that use administrative data in Italian context and quality of data is not always satisfying, even if increasing.
Testing cosmic censorship conjecture near extremal black holes with cosmological constants
Creators: name: Zhang, Yuan
name: Gao, Sijie
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It has been shown previously that an extremal Reissner-Nordström or an extremal Kerr black hole cannot be overcharged or overspun by a test particle if radiative and self-force effects are neglected. In this paper, we consider extremal charged and rotating black holes with cosmological constants. By studying the motion of test particles, we find the following results: An extremal Reissner-Nordström anti-de Sitter (RN-AdS) black hole can be overcharged by a test particle but an extremal Reissner-Nordström de Sitter (RN-dS) black hole cannot be overcharged. We also show that both extrmal Kerr-de-Sitter (Kerr-dS) and Kerr-anti-de-Sitter (Kerr-AdS) black holes can be overspun by a test particle, implying a possible breakdown of the cosmic censorship conjecture. For the Kerr-AdS case, the overspinning requires that the energy of the particle be negative, a reminiscent of the Penrose process. In contrast to the extremal RN and Kerr black holes, in which cases the cosmic censorship is upheld, our results suggest some subtle relations between the cosmological constants and the comic censorship. We also discuss the effect of radiation reaction for the Kerr-dS case and find that the magnitude of energy loss due to gravitational radiation may not be enough to prevent the violation of the cosmic censorship.
description: 15 pages, 1 figure
SYNTHESIS OF METAL COMPLEXES WITH BIO-INSPIRED NITROGEN-CONTAINING MACROCYCLIC LIGANDS AND THEIR USE IN CATALYSIS
Creators: name: TSEBERLIDIS, GIORGIO
Publisher: name: Universit� degli Studi di Milano
Year: 2018

description: The introduction of a pyridine moiety into the skeleton of a polyazamacrocyclic ligand affects both the thermodynamic properties and the coordination kinetics of the resulting metal complexes. These features have attracted great interest from the scientific community in recent years. The field of application of pyridine-containing macrocyclic ligands ranges from biology to supramolecular chemistry, encompassing MRI, molecular recognition, materials and catalysis. In this thesis is demonstrated the very good catalytic acivity of Ag(I), Cu(I) and Fe(III) Pyridine-containing Ligand complexes. Moreover, coordination studies have been performed leading to a complete understanding of the structural features of this class of complexes.
QUASI-OPTIMAL NONCONFORMING METHODS FOR SYMMETRIC ELLIPTIC PROBLEMS
Creators: name: ZANOTTI, PIETRO
Publisher: name: Universit� degli Studi di Milano
Year: 2018

description: In this PhD thesis we characterize quasi-optimal nonconforming methods for symmetric elliptic linear variational problems and investigate their structure. The abstract analysis is complemented by various applications and numerical tests in the finite element framework. In the first part of the thesis we introduce a rather large class of nonconforming methods, mimicking the variational structure of the model problem. Then, we characterize the subclass of quasi-optimal methods in terms of suitable notions of stability and consistency. We determine also the quasi-optimality constant and observe its dependence on the proposed notions of stability and consistency. For this purpose, we introduce an appropriate stability constant and two consistency measures. The second part of the thesis is devoted to exemplify the application of the above-mentioned results through the construction of various quasi-optimal nonconforming finite element methods. We consider the following three model problems: the Poisson problem, the linear elasticity problem and the biharmonic problem. For each one of them, we propose approximation methods based on discontinuous elements and/or classical nonconforming elements, such as the Crouzeix-Raviart and Morley elements. All methods are shown to be quasi-optimal, with quasi-optimality constant bounded in terms of shape regularity, and computationally feasible. In the third part of the thesis we restrict our attention to the two-dimensional Poisson problem and compare the performance of different quasi-optimal, first-order methods on various benchmarks. The purpose of these tests is twofold. On the one hand, we aim at assessing the actual size of the constants involved in our analysis. On the other hand, we highlight the importance of the proposed notions of stability and consistency when rough load terms come into play. All the numerical experiments are implemented within the finite element toolbox ALBERTA.
STUDIO DI NUOVI MARCATORI PER LA STRATIFICAZIONE PROGNOSTICA DEI PAZIENTI CON MIELOMA MUTLIPLO
Creators: name: BERMEMA, ANISA
Publisher: name: Universit� degli Studi di Milano
Year: 2014

description: The therapeutic options for the treatment of multiple myeloma (MM) have rapidly evolved starting from the mid ?90s, leading to a great improvement of the clinical outcome and prolonged survival for this pathology. In addition to the development of novel agents, the identification of new biomarkers and a deeper insight into the biological features of this neoplasia can lead to a further amelioration in patients? prognosis. In this study we have evaluated several features of this disease in order to identify new factors to allow a better prognostic stratification of MM subjects. We have initially investigated circulating microRNAs as potential biomarkers for multiple myeloma. MiRNAs are small regulatory non coding RNAs that primarily affect the stability of mRNA and/or the initiation and progression of protein translation. It has been demonstrated that circulating miRNAs are stable and can be reliably extracted and assayed in either serum or plasma. The expression profile of circulating miRNAs has therefore been analyzed in newly diagnosed MM patients looking for a correlation with the clinical features of the disease. We have so identified miR-193b as a new possible biomarker of osteolytic lesions, that represent a distinctive feature of multiple myeloma. Furthermore, we have performed an immunophenotypic analysis of bone marrow aspirates and peripheral blood of patients with relapsed/refractory disease that have subsequently received a protein inhibitor or immunomodulant drug based regimen. In this section it has been observed the presence of tiding tumoral clones in the bone marrow of patients being treated after disease relapse. We have also evaluated the potential role of myeloid derived suppressor cells (MDSC) present in the peripheral blood of patients during therapy and we have analyzed their trend during treatment. Our data suggest a possible role of these cells in regulating treatment response to proteasome inhibitor bortezomib. Eventually, it has been studied the presence of tumor initiating cells, whose existence has been demonstrated in several cancer types. This relatively small subpopulation could represent the therapy resistant tumor fraction that prompts its recurrence. In this study we have defined a method for a simple identification of these cells in bone marrow samples from MM patients and have identified a possible immunophenotype for their definition. On the whole, this study has investigated several aspects of this pathology that supply further insights on the biological and clinical features of this complex pathology in order to achieve a more efficient prognostic stratification.
Picosecond all-optical switching in hydrogenated amorphous silicon microring resonators
Creators: name: Pelc, Jason S.
name: Rivoire, Kelley
name: Vo, Sonny
name: Santori, Charles
name: Fattal, David A.
name: Beausoleil, Raymond G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We utilize cross-phase modulation to observe all-optical switching in microring resonators fabricated with hydrogenated amorphous silicon (a-Si:H). Using 2.7-ps pulses from a mode-locked fiber laser in the telecom C-band, we observe optical switching of a cw telecom-band probe with full-width at half-maximum switching times of 14.8 ps, using approximately 720 fJ of energy deposited in the microring. In comparison with telecom-band optical switching in undoped crystalline silicon microrings, a-Si:H exhibits substantially higher switching speeds due to reduced impact of free-carrier processes.
L.i.F.E - Lifestyle for Environment: A Path Towards Sustainable Development
Creators: name: Dr. Sarang Dhatrak
name: Dr. Sukhdev Mishra
name: Mr. Jay Trivedi
name: Dr. Sweta Panchal
Publisher: name: Zenodo
Year: 2022

description: L.i.F.E - Lifestyle for Environment: A Path Towards Sustainable Development
Στατιστική ανάλυση τουριστικών δεδομένων
Creators: name: Ανδρουλάκης, Ορέστης
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Τουρισμός
subject: Ανάλυση δεδομένων
subject: Γλώσσα προγραμματισμού R

description: Στη παρούσα διπλωματική εργασία θα δούμε αρχικά μερικές γενικές έννοιες του τουρισμό και στην συνέχεα θα γίνει μια ανάλυση του τουρισμού για τη χώρα μας. Ακολούθως θα γίνει μια ανάλυση των δεδομένων καθώς και η δημιουργία μοντέλου συσχέτισης. Τέλος καταλήγουμε σε μερικά συμπεράσματα για τον τουρισμό στη χώρα μας. Ο στόχος της παρούσας διατριβής είναι κυρίως να γίνει μία προσπάθεια εκτίμησης της βαρύτητας του υποβάθρου του επισκέπτη ως παράγοντα διαμόρφωσης των επιλογών του και των προτιμήσεών του. Συγκεκριμένα, επιχειρείται μία συσχέτιση ορισμένων χαρακτηριστικών των διεθνών τουριστών που καταφθάνουν στην Ελλάδα κάθε χρόνο, με τα χαρακτηριστικά εκείνα του τόπου μας που τους ελκύουν/ενθαρρύνουν να τον επισκεφθούν. Παράλληλα, συσχετίζεται η παγκόσμια γεωγραφία με τα σημεία εισόδου που εκείνοι επιλέγουν για την είσοδό τους στη χώρα.
NEW ORGANOMETALLIC COMPLEXES WITH PHOTOLUMINESCENT AND NON LINEAR OPTICAL PROPERTIES
Creators: name: ROSSI, ESTER
Publisher: name: Universit� degli Studi di Milano
Year: 2010

description: Owing to their remarkable luminescent properties, organometallic complexes of transition-metals have recently received considerable attention as phosphorescent emitters for Organic Light Emitting Diodes (OLEDs). In particular, various platinum(II) complexes with a cyclometallated 1,3-di(2-pyridyl)benzene ligand seem very promising in this respect because they are highly emissive. These observations prompted us to prepare new cyclometallated Pt(II) complexes with a substituted 1,3-di(2-pyridyl)benzene ligand to get a better understanding of the effect on the emission and quantum yields of different R substituents and various Y ancillary ligands. It turned out that the prepared complexes are highly luminescent showing quantum yields above 50%. Besides, in the last few years organometallic and coordination compounds have also attracted a great deal of attention as chromophores for second-order nonlinear optical (NLO) applications, because they may offer a great diversity of tunable electronic properties by virtue of the metal centre. We have investigated the NLO response of new push-pull anellataed hemicyanine ligands and their related cis-[Ir(CO)2ClL] complexes. NLO properties were determined by the Electric Field Induced Second Harmonic generation (EFISH) technique. These new NLO chromophores are of particular interest since they are characterized by a value higher o fquadratic hyperpolarizability than that of Disperse Red One, an NLO chromophore currently used in electro-optics polymers, and, moreover, they possess particular photostability. We also preliminarily investigated the second-order NLO response of both known and new members of the platinum(II) complexes family above mentioned. This study was conductued by both EFISH and Hyper Light Scattering (HLS) techniques. It turned out that the presence of the PtCl moiety enhances the NLO properties compared to other organic and organometallic compounds. Finally an octupolar tripodal ligand had been prepared which terminates with pyridyl groups that were easily linked to organometallic fragments. Although coordination of our octupolar core to Zn complexes of a commercial porphyrin, or phtalocyanine, did not lead to a substantial improvement in NLO properties, this study puts in evidence the remarkably large second order NLO response of the free Zn-porphyrine itself especially considering its very simple structure and commercially availiability. Details on these studies are presented in this thesis.
F-term Stabilization of Odd Axions in LARGE Volume Scenario
Creators: name: Gao, Xin
name: Shukla, Pramod
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of the LARGE volume scenario, stabilization of axionic moduli is revisited. This includes both even and odd axions with their scalar potential being generated by F-term contributions via various tree-level and non-perturbative effects like fluxed E3-brane instantons and fluxed poly-instantons. In all the cases, we estimate the decay constants and masses of the axions involved.
description: 35 pages, 3 figures, version3, Title changed along with significant changes in the introduction to stress that implementing a 'concrete' visible sector was not among the goals to achieve in this article, version to appear in NPB
IL PRINCIPIO DI LEGALIT� NEL RAPPORTO TRA L'ORDINAMENTO GIURIDICO ITALIANO E IL SISTEMA DELLA CONVENZIONE EUROPEA DEI DIRITTI DELL'UOMO
Creators: name: VALENTINO, ALESSIA
Publisher: name: Universit� degli Studi di Milano
Year: 2016

description: The principle of legality is one of the fundamental principles of the Italian constitutional system. It requires that an individual prescription must be authorized by an higher norm of the legal system with respect non only to the competence of the issuing authority but also to its normative content. This principle has had different origins and developments in the European continental States than in the common law systems. It is granted, in the Italian Constitution, at article 25.2 and it needs the so called ?riserva di legge? in order to be effective: it requires that all law must be clear, ascertainable and non-retrospective and, overall, that they come from Parliament, the only constitutional organ which is representative of people. In particular, in criminal law it is embodied in the general prohibition of the imposition of criminal sanction for fact or omission that were not criminal at the time at the commission or omission. Instead, in the common law systems, the rule of law is satisfied by both the written than the unwritten law. This paper addresses the question of whether the interaction between the Italian legal system and that of the European Convention of Human Rights has influenced the practical application of this principle by the Italian courts. In particular, the research analyses what the ECtHR means with the term law and notes that it makes no difference between written and unwritten law. Both of them are law in the meaning of the Convention and the guarantees of the principle of legality apply for one as for the other. In the Italian system the principle is satisfied only by written law and not by the jurisprudence of the courts even if consolidated. These two different settings have led to the growth of conflicts between the two legal systems and require thinking about the opportunity and the need for the domestic courts and the Strasbourg Court to find a common language when they speak of the rule of law aimed at defining human rights.
DALL'EPISTEMOLOGIA ALL'ETICA: PER UNA PO(ETICA) DELLA RELAZIONE FRA SOGGETTO E NATURA NELLA POESIA AMERICANA CONTEMPORANEA
Creators: name: BINASCO, CAMILLA
Publisher: name: Universit� degli Studi di Milano
Year: 2019

description: American nature poetry has often expressed and explored epistemological and aesthetical issues. This work aims to verify a shift toward ethical concerns in late Twentieth-century nature poetry. I consider the work of three American female poets: Mary Oliver, Louise Gl�ck and Denise Levertov. In order to appreciate the extent of this ethical shift, each chapter presents a close reading analysis performed within a theoretical frame drawn from Michail Bakhtin?s philosophy and ecocriticism. In their effort to represent the encounter between human and nonhuman entities these poetics assume a phenomenological perspective and subsume the rationalistic and epistemological dichotomy between subject and object into a relation of alterity. This relation revolves around the I-other polarity and constitutes the dynamic and ongoing negotiation of the subject?s identity. Thus, intersubjectivity is translated into lyric expression by several rhetorical strategies and a certain dialogical strive. Oliver, Levertov and Gl�ck accommodate the traditional lyric form in order to express and represent the ethical repositioning experienced in front of nature. Also, they create three different po(ethics) that explicitly involve the reader in the ethical repositioning they represent. Their work strives for a dialogical notion of both the lyrical subject and the poetic act, and for this reason it challenges the boundaries of lyric monologic expression from within.
Semi-inner products and the concept of semi-polarity
Creators: name: Horváth, Ákos G.
name: Lángi, Zsolt
name: Spirova, Margarita
Publisher: name: arXiv
Year: 2013
Subjects: subject: Metric Geometry (math.MG)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B20, 46C50, 52A20, 52A21

description: The lack of an inner product structure in Banach spaces yields the motivation to introduce a semi-inner product with a more general axiom system, one missing the requirement for symmetry, unlike the one determing a Hilbert space. We use it on a finite dimensional real Banach space $(\X, \| \cdot\|)$ to define and investigate three concepts. First, we generalize that of \emph{antinorms}, already defined in Minkowski planes, for even dimensional spaces. Second, we introduce \emph{normality maps}, which in turn leads us to the study of \emph{semi-polarity}, a variant of the notion of polarity, which makes use of the underlying semi-inner product.
description: 16 pages