cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
tesis-Inteligencia artificial en la predicción de láminas de lluvia.pdf
Creators: name: QUISPE POMALLIHUA, ALEXANDER ROBERT
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 409901
subject: Agricultural engineering

description:
El objetivo de este proyecto de ingeniería es usar inteligencia artificial para la predicción de láminas de lluvia tanto para datos faltantes en una estación pluviométrica y como la determinación de la probabilidad de ocurrencia de una precipitación máxima anual en 24 horas, la rama de la inteligencia artificial a usarse fue el Machine Learning con criterio del algoritmo supervisado, cuya arquitectura de datos fueron las redes multicapa, una función de activación ReLU y optimizadores de peso LBFGS y Adam, el procesamiento de datos se realizó en el lenguaje de programación Python, consecuentemente se evaluó y comparó los resultados obtenidos con los métodos de distribución probabilísticas y datos pluviométricos reales, para así luego usarlos en la modelación hidráulica con el software SWMM. La información pluviométrica usadas fueron obtenidas del Servicio Nacional de Meteorología e Hidrología del Perú (SENAMHI) y la Autoridad Nacional del Agua (ANA), la precipitación máxima anual en 24 horas obtenida fue convertida a un hietograma con el fin de usarla en el software SWMM. Se extrajo el modelo de elevación digital que proporciona el explorador de ciencia de datos terrestres de la NASA (EARTHDATA) para ser transformada a curvas de nivel con el software ArcGis, para posteriormente exportarla al Autodesk Civil 3D y delimitar las sub cuencas en función de las curvas de nivel y el catastro urbano suministrado por la Superintendencia Nacional de los Registros Públicos (SUNARP) para luego configurar e implementar los parámetros de modelado. La inteligencia artificial demostró ser eficiente en este proyecto, ya que los datos obtenidos se ajustan para el propósito que estábamos buscando y la realización del modelado en SWMM que es usado por muchos investigadores arroja resultados muy descriptivos y esenciales para la toma de decisiones.
HISTORICAL-PHILOSOPHICAL AND PUBLIC ADMINISTRATION ISSUES IN NIZAMULMULK'S "SIYOSATNOMA"
Creators: name: Asrakulova, Adiba
Publisher: name: Zenodo
Year: 2025

description: This article discusses the issues of historical-philosophical and public administration, political history, socio-economic life, society, state management, philosophy and ethics in Nizamulmulk’s “Siyosatnoma”.
Quel avenir pour les francs CFA
Creators: name: Aminata KEITA
name: Djibril KEITA
name: Issoufou Soumaila MOULEYE
name: Bourama DEMBELE
name: Amadou DOLO
Publisher: name: Zenodo
Year: 2024

description: Le franc CFA, un obstacle au développement des pays africains. En effet, les difficultés de l’Afrique de l’Ouest sont dues à la baisse du taux de change la convertibilité de CFA en Euro ou en Dollars. En outre, l’arrimage du franc CFA à l’euro empêche le développement des États de la zone franc et  d’être victimes de crises de change qui touchent généralement ces États. Ces crises de change nuiraient notamment à la stabilité économique et financière de la zone.

Les progrès de l’intégration commerciale en Afrique de l’Ouest suscitent une nouvelle réflexion sur l’avenir de la Zone franc. Le franc CFA, a  plus de soixante (60) années d’existence et a connu de nombreuses réformes qui, tout en laissant subsister les principes de base, fixité du taux de change des francs CFA et la dévaluation en 1994 de franc CFA sont des freins du développement et la croissance des pays membres de la zone CFA.

La garantie de convertibilité par le moyen des comptes des opérations des Banques centrales (BCEAO) auprès du Trésor français. La création de l’union économique monétaire Ouest Africain (UEMOA), contrôle les mouvements de capitaux, substitution de l’euro au franc français, statut d’indépendance des banques centrales.
title: Home Equity Extraction and the Boom-Bust Cycle in Consumption and Residential Investment
Creators: name: Zhou, Xiaoqing
Publisher: name: Bank of Canada
Year: 2018

description: The consumption boom-bust cycle in the 2000s coincided with large fluctuations in the volume of home equity borrowing. Contrary to conventional wisdom, I show that homeowners largely borrowed for residential investment and not consumption. I rationalize this empirical finding using a calibrated two-goods, multiple-assets, heterogeneous-agent life-cycle model with borrowing frictions. The model replicates key features of the household-level and aggregate data. The model offers an alternative explanation of the consumption boom-bust cycle. This cycle is caused by large fluctuations in the number of borrowers and hence in total home equity borrowing, even though the fraction of borrowed funds spent on consumption is small.
description: Le cycle d’expansion et de contraction de la consommation dans les années 2000 a coïncidé avec des fluctuations importantes du volume de prêts sur valeur domiciliaire. Nous montrons que, contrairement à ce qui est communément admis, les fonds empruntés par les propriétaires de logement visaient dans la plupart des cas à effectuer des investissements résidentiels et non des dépenses de consommation. Nous étayons ce résultat empirique au moyen d’un modèle de cycle de vie étalonné qui intègre deux biens, plusieurs actifs, des agents hétérogènes et dans lequel les emprunts font l’objet de frictions. Le modèle reproduit les principales caractéristiques des données sur les ménages et des données agrégées. Il fournit une explication alternative du cycle d’expansion et de contraction de la consommation. Ce cycle serait causé par de grandes fluctuations du nombre d’emprunteurs, et donc du volume total de prêts sur valeur domiciliaire, et ce, même si seulement une petite fraction des fonds empruntés est consacrée à des dépenses de consommation.
Deciphering Crypto Twitter
Creators: name: Kang, Inwon
name: Mridul, Maruf Ahmed
name: Sanders, Abraham
name: Ma, Yao
name: Munasinghe, Thilanka
name: Gupta, Aparna
name: Seneviratne, Oshani
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Cryptocurrency is a fast-moving space, with a continuous influx of new projects every year. However, an increasing number of incidents in the space, such as hacks and security breaches, threaten the growth of the community and the development of technology. This dynamic and often tumultuous landscape is vividly mirrored and shaped by discussions within Crypto Twitter, a key digital arena where investors, enthusiasts, and skeptics converge, revealing real-time sentiments and trends through social media interactions. We present our analysis on a Twitter dataset collected during a formative period of the cryptocurrency landscape. We collected 40 million tweets using cryptocurrency-related keywords and performed a nuanced analysis that involved grouping the tweets by semantic similarity and constructing a tweet and user network. We used sentence-level embeddings and autoencoders to create K-means clusters of tweets and identified six groups of tweets and their topics to examine different cryptocurrency-related interests and the change in sentiment over time. Moreover, we discovered sentiment indicators that point to real-life incidents in the crypto world, such as the FTX incident of November 2022. We also constructed and analyzed different networks of tweets and users in our dataset by considering the reply and quote relationships and analyzed the largest components of each network. Our networks reveal a structure of bot activity in Crypto Twitter and suggest that they can be detected and handled using a network-based approach. Our work sheds light on the potential of social media signals to detect and understand crypto events, benefiting investors, regulators, and curious observers alike, as well as the potential for bot detection in Crypto Twitter using a network-based approach.
An environmental-economic evaluation of hybrid electric vehicles: Toyota's Prius vs. its conventional internal combustion engine Corolla
Creators: name: Lave, Lester B.
name: Maclean, Heather
Publisher: name: Carnegie Mellon University
Year: 1995
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: We compare the second generation of the first commercial hybrid electric vehicle (HEV), the Toyota Prius, to the conventional internal combustion engine (ICE) Toyota Corolla. The more complicated and expensive Prius has lower pollutant and carbon dioxide emissions and better fuel economy than the Corolla. In a world of limited resources and many petroleum users and emissions sources, the policy question is whether the best use of resources is to build hybrids, to improve the fuel economy and environmental emissions of other mobile sources, or to devote the resources to other environmental projects. We find that the Prius is not cost-effective in improving fuel economy or lowering emissions. For the Prius to be attractive to US consumers, the price of gasoline would have to be more than three times greater than at present. To be attractive to regulators, the social value of abating tailpipe emissions would have to be 14 times greater than conventional values. Alternatively, the value of abating greenhouse gas emissions would have to be at least $217/t. There are many opportunities for abating pollutant and greenhouse gas emissions at lower cost. We conclude that hybrids will not have significant sales unless fuel prices rise several-fold or unless regulators mandate them.
A Preliminary Exploration of YouTubers' Use of Generative-AI in Content Creation
Creators: name: Lyu, Yao
name: Zhang, He
name: Niu, Shuo
name: Cai, Jie
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Content creators increasingly utilize generative artificial intelligence (Gen-AI) on platforms such as YouTube, TikTok, Instagram, and various blogging sites to produce imaginative images, AI-generated videos, and articles using Large Language Models (LLMs). Despite its growing popularity, there remains an underexplored area concerning the specific domains where AI-generated content is being applied, and the methodologies content creators employ with Gen-AI tools during the creation process. This study initially explores this emerging area through a qualitative analysis of 68 YouTube videos demonstrating Gen-AI usage. Our research focuses on identifying the content domains, the variety of tools used, the activities performed, and the nature of the final products generated by Gen-AI in the context of user-generated content.
description: Accepted at CHI LBW 2024
Lynx D5.1 Intermediate demonstrator for pilot 1
Creators: name: Strumegger, Anna Katharina
name: Sageder, Christian
Publisher: name: Zenodo
Year: 2019
Subjects: intermediate demonstrator pilot 1, contract management

description: The main purpose of this document is to give an insight into the current development status of pilot 1 (contract management) which is being developed within the Lynx project. Contracting is a common activity in companies, but managing contracts systematically is a cumbersome activity only few companies are effective at. Due to a lack of central administration, contracts are physically and electronically distributed across the entire organization. Against this backdrop, we are focusing on automated contract analysis to provide smart contract archiving solutions and compliance services. In order to achieve this, two approaches have been pursuit: A pure back-end solution to analysis single and multiple contracts including an archive which can be used by other services / applications. A front-end solution where a single user has the possibility to manage contracts. For the front-end solution selected provisional screenshots and descriptions are provided. In addition, a description of the architecture and newly developed services for the back-end is given. This deliverable is structured as follows. The first section deals with the relevance of contract management and embeds the efforts into the broader Lynx context. Section 2 describes several use cases we aim at solving with this pilot. In light of this, we are discussing objectives, our working basis in the pilot phase and the visualization of basic modules. Section 3 (proof of concept) and 4 (pilot architecture) contain information about the underlying back-end solutions. Finally, the deliverable closes with an outlook.
Postmortem Depressions and Anxiety among Women at Banadir Hospital.
Creators: name: Suad, Abdullahi Mohamed
Publisher: name: Zenodo
Year: 2025
Subjects: Postmortem Depressions
and Anxiety among
Women at Banadir Hospital.

description: Abstract

Background: Obesity has been correlated with a host of adverse health effects, such as cardiovascular disease, type-2 diabetes, obesity-related cancers and osteoarthritis. There is also a wide range of psychological burdens concomitant with obesity. This study explored the influence of cigarette smoking and food consumption patterns on BMI after adjusting for various socio-demographic characteristics. Since weight-based stereotypes may have an impact on smoking behavior and both obesity and smoking have been associated with detrimental health effects, interdependency between them is quite possible.

Methods: A quantitative descriptive cross-sectional study with 100 of participant’s smoking individuals in Banadir region was conducted August 2022 up to February 2023. The study samples were enrolled through the cluster random sampling design. Data was collected using an interviewer administered semi-structured questionnaire. Data was analyzed using SPSS ver. 20.

Result: A total of 100 questionnaires were distributed and 100 were received with participant’s rate 100%. Correspondingly, 46.25% (37) of the respondents were single, 28.75% (23) of the respondents were married, 25% (20) of the Respondents were Divorced.

This means that most of the respondents (46.25%) were married. A large number of the study participants belong to the age group between ages 26-35 year, meanwhile 31.25% (25) while small participants to belong to the age group, with minimum and maximum age 16 - 25 year respectively and while 25% (20) were between age group 36-45 years. Educational status, 15% (12) of the respondents were primary school level, and 32.5%

(26) of the respondents were secondary school, 36.25% (29) of the respondents were university level and 16.25%(13) of the respondents were never went to school. This means that most of care givers (36.25%) were university level. Occupational status, 48.75% (39) of the respondents was

drivers, 13.35% (11) of the respondents were teachers, 23.75% (19) of the respondents were unemployed and 13.75% (11) of the respondents were traders. This means that most of respondents (69%) were unemployed.

Conclusion: There is need for the Ministry of Health, the young individual’s awareness and prevention regarding smoking risk factors (lung cancer) and we also to management yourself, training institutions and others.

Cigarette smoking and alcohol consumption may potentiate each other’s use. The use of bothsubstances appears to contribute to dietary intake patterns that increase the risk for developing chronic diseases.
Mid-infrared imaging of brown dwarfs in binary systems
Creators: name: Geißler, K.
name: Chauvin, G.
name: Sterzik, M. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Brown dwarfs exhibit complex atmospheric signatures, and their properties depend sensitively on effective temperature, surface gravity, and metallicity. Several physical properties of brown dwarfs in binary systems can be well inferred from the primary, and therefore allow to better constrain their atmospheres. Aims: We want to constrain atmospheric models of brown dwarfs in binary systems using narrow-band mid-infrared photometry. Methods: High spatial resolution and sensitivity is required to resolve the components. Therefore we have obtained deep mid-infrared images of four close binary systems with brown dwarf companions using VISIR at the VLT in three narrow-band filters at 8.6, 10.5 and 11.25 micron. Results: Three brown dwarfs companions (GJ 229B, HD 130948BC and HR 7329B) were detected at 8.6micron. HD 130948BC was also observed at 10.5micron. We finally place upper flux limits for the other narrow band filters with null detections. Conclusions: Our results are in general compatible with previous observations and model expectations for these objects. For HD 130948BC, we conclude photometric variability on a significance level of 2.8sigma based on repeated observations. The bandpass around 10.5micron appears specifically well suited for variability studies, and we speculate that either inhomogeneities in the atmospheric NH3 distribution, or silicate absorption might cause its time-variability.
description: accepted by A&A
An Engineering-Economic Analysis of Syngas Storage
Creators: name: Apt, Jerome
name: Newcomer, Adam
name: Lave, Lester B.
name: Stratford  Douglas
name: Dunn, Leslie Morris
Publisher: name: Carnegie Mellon University
Year: 2002
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: We examined whether an IGCC facility that operates its gasifier continuously but stores the syngas and produces electricity only when daily prices are high may be more profitable than an IGCC facility with no syngas storage. We consider reference plants under a range of economic assumptions, both with and without carbon dioxide capture and sequestration. The goal of this study was to do an initial examination of whether storing syngas can increase the profitability of IGCC plants, rather than to perform a plant design.
Collective diffusion of dense adsorbate at surfaces of various geometry
Creators: name: Mińkowski, Marcin
name: Załuska--Kotur, Magdalena A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Convenient variational formula for collective diffusion of many particles adsorbed at lattices of arbitrary geometry is formulated. The approach allows to find the expressions for the diffusion coefficient for any value of the system's coverage. It is assumed that particles interact via on-site repulsion excluding double site occupancy. It is shown that the method can be applied to various systems of different geometry. Examples of real systems such as GaAs with specific energetic landscapes are also presented. Diffusion of Ga adatoms on GaAs(001) surface reconstructed in two different symmetries is studied. It is shown how increasing Ga coverage changes the character of diffusion from isotropic two-dimensional into highly anisotropic, almost one-dimensional. It is shown how important the role of the inter-particle correlations is, which influence the value of the collective diffusion coefficient at higher coverages.
MODetector (MOD): A Dual-Functional Optical Modulator-Detector for On-Chip Communication
Creators: name: Sun, Shuai
name: Zhang, Ruoyu
name: Peng, Jiaxin
name: Narayana, Vikram
name: Dalir, Hamed
name: El-Ghazawi, Tarek
name: Sorger, Volker J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Physical challenges at the device and interconnect level limit both network and computing energy efficiency. While photonics is being considered to address interconnect bottlenecks, optical routing is still limited by electronic circuitry, requiring substantial overhead for optical-electrical-optical conversion. Here we show a novel design of an integrated broadband photonic-plasmonic hybrid device termed MODetector featuring dual light modulation and detection function to act as an optical transceiver in the photonic network-on-chip. With over 10 dB extinction ratio and 0.8 dB insertion loss at the modulation state, this MODetector provides 0.7 W/A responsivity in the detection state with 36 ps response time. This multi-functional device: (i) eliminates OEO conversion, (ii) reduces optical losses from photodetectors when not needed, and (iii) enables cognitive routing strategies for network-on-chips.
description: 6 pages, 4 figures
QCD on the Cell Broadband Engine
Creators: name: Belletti, F.
name: Bilardi, G.
name: Drochner, M.
name: Eicker, N.
name: Fodor, Z.
name: Hierl, D.
name: Kaldass, H.
name: Lippert, T.
name: Maurer, T.
name: Meyer, N.
name: Nobile, A.
name: Pleiter, D.
name: Schaefer, A.
name: Schifano, F.
name: Simma, H.
name: Solbrig, S.
name: Streuer, T.
name: Tripiccione, R.
name: Wettig, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We evaluate IBM's Enhanced Cell Broadband Engine (BE) as a possible building block of a new generation of lattice QCD machines. The Enhanced Cell BE will provide full support of double-precision floating-point arithmetics, including IEEE-compliant rounding. We have developed a performance model and applied it to relevant lattice QCD kernels. The performance estimates are supported by micro- and application-benchmarks that have been obtained on currently available Cell BE-based computers, such as IBM QS20 blades and PlayStation 3. The results are encouraging and show that this processor is an interesting option for lattice QCD applications. For a massively parallel machine on the basis of the Cell BE, an application-optimized network needs to be developed.
description: 7 pages, 3 figures, contribution to Lattice 2007 (Regensburg, Germany)
A parametric model for the changes in the complex valued conductivity of a lung during tidal breathing
Creators: name: Nordebo, Sven
name: Dalarsson, Mariana
name: Khodadad, Davood
name: Müller, Beat
name: Waldman, Andreas
name: Becher, Tobias
name: Frerichs, Inez
name: Sophocleous, Louiza
name: Sjöberg, Daniel
name: Seifnaraghi, Nima
name: Bayford, Richard
Publisher: name: arXiv
Year: 2018
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Classical homogenization theory based on the Hashin-Shtrikman coated ellipsoids is used to model the changes in the complex valued conductivity (or admittivity) of a lung during tidal breathing. Here, the lung is modeled as a two-phase composite material where the alveolar air-filling corresponds to the inclusion phase. The theory predicts a linear relationship between the real and the imaginary parts of the change in the complex valued conductivity of a lung during tidal breathing, and where the loss cotangent of the change is approximately the same as of the effective background conductivity and hence easy to estimate. The theory is illustrated with numerical examples, as well as by using reconstructed Electrical Impedance Tomography (EIT) images based on clinical data from an ongoing study within the EU-funded CRADL project. The theory may be potentially useful for improving the imaging algorithms and clinical evaluations in connection with lung EIT for respiratory management and monitoring in neonatal intensive care units.
Sistemas de información de salud en contextos extremos: Uso de teléfonos móviles para combatir el sida en Uganda
Creators: name: Njuba, Livingstone
name: Gómez-Morantes, Juan E.
name: Herrera, Andrea
name: Camacho, Sonia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The HIV/AIDS pandemic is a global issue that has unequally affected several countries. Due to the complexity of this condition and the human drama it represents to those most affected by it, several fields have contributed to solving or at least alleviating this situation, and the information systems (IS) field has not been absent from these efforts. With the importance of antiretroviral therapy (ART) as a starting point, several initiatives in the IS field have focused on ways to improve the adherence and effectiveness of this therapy: mobile phone reminders (for pill intake and appointments), and mobile interfaces between patients and health workers are popular contributions. However, many of these solutions have been difficult to implement or deploy in some countries in the Global South, which are among the most affected by this pandemic. This paper presents one such case. Using a case-study approach with an extreme-case selection technique, the paper studies an m-health system for HIV patients in the Kalangala region of Uganda. Using Heeks' design-reality gap model for data analysis, the paper shows that the rich interaction between social context and technology should be considered a central concern when designing or deploying such systems.
description: 30 pages, in Spanish
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Cart. 190 (11 H 75), 316 folios, f. 0210r
Creators: name: de la Côte d'Or, Archives départementales
name: CG21/F.PETOT/2012
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0210r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0210r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
An Engineering and Policy Analysis of Fiber Introduction into the Residential Subscriber Loop
Creators: name: Sirbu, Marvin
name: Reed, David P.
name: Ferrante, Frank E.
Publisher: name: Carnegie Mellon University
Year: 1995
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: An engineering model which provides a framework for evaluating alternative network architectures for providing fiber to the home is presented. The analysis employs this model to construct estimates of the average cost per subscriber of several network alternatives which have been proposed in the literature. The results identify two possible network architectures, the active double star and the passive double star, as particularly attractive alternatives. Sensitivity analyses provide detail on the critical contributors to overall costs. Several policy issues raised by the analysis, including the proper allocation of risk from fiber-to-the-home investments, are considered
Apprendre la démocratie à l’école secondaire : trajectoire de participation sociale et politique des adolescents
Creators: name: Cournoyer, Alexandre
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2019
Subjects: Adolescents
Participation sociale et politique

description: La participation sociale et politique des jeunes demeure un phénomène important pour le maintien des sociétés démocratiques. Le constat du désengagement, qui semble dominer le discours public et scientifique depuis plusieurs années, suggère une crise démocratique sinon actuelle, au moins à venir. Or, peut-on vraiment conclure au désengagement de la jeunesse ? La participation électorale est-elle vraiment un indicateur suffisant pour appuyer une telle prédiction ? Cette thèse cherche à mieux comprendre la trajectoire de participation sociale et politique des jeunes d’âge scolaire (de 12 à 17 ans) à l’école secondaire en répondant à la question suivante : « Comment les adolescents font-ils l’expérience de la participation sociale et politique en milieu scolaire ? »L’originalité de l’approche proposée par cette thèse pour répondre à cette question repose sur deux prémisses. Premièrement, que l’engagement politique et social doit être étudié comme un processus plutôt que comme une action ponctuelle. Deuxièmement, que les adolescents sont des acteurs politiques avant l’âge de la majorité et il est pertinent de s’intéresser à leurs activités.Cette thèse offre deux principales contributions. D’abord, elle permet de mieux comprendre le processus de socialisation politique vécu pour les adolescents en milieu scolaire. Elle détaille le processus d’éducation à la citoyenneté à l’école secondaire et le processus de subjectivation croissant des adolescents qui la vivent. Ensuite, elle rend compte de l’expérience des adolescents au sein de structures démocratiques enchâssées aux institutions d’enseignement, comme les comités d’élèves et les tables de concertation. De plus, elle documente le fonctionnement interne de ces différentes instances et comment ces dernières s’arriment à l’institution scolaire en général.
title: What Drives Interbank Loans? Evidence from Canada
Creators: name: Bulusu, Narayan
name: Guérin, Pierre
Publisher: name: Bank of Canada
Year: 2018

description: We identify the drivers of unsecured and collateralized loan volumes, rates and haircuts in Canada using the Bayesian model averaging approach to deal with model uncertainty. Our results suggest that the key friction driving behaviour in this market is the collateral reallocation cost faced by borrowers. Borrowers therefore adjust unsecured lending inresponse to changes in short-term cash needs, and use repos to finance persistent liquidity demand. We also find that lenders set rates and haircuts taking into account counterparty credit risk and collateral market price volatility.
description: En utilisant la méthode de la combinaison bayésienne de modèles pour contrer l’incertitude qui entache les modèles, nous distinguons, pour le Canada, les déterminants des volumes et des taux des prêts non garantis et des prêts garantis, ainsi que des décotes appliquées aux actifs donnés en garantie. Nos résultats indiquent que les coûts de réaffectation des actifs donnés en garantie supportés par les emprunteurs constituent la principale friction régissant le comportement des acteurs sur ce marché. Les emprunteurs s’adaptent aux variations de leurs besoins de trésorerie à court terme en modifiant leur recours aux prêts non garantis et comblent leurs besoins persistants de liquidité au moyen des mises en pension. Nous constatons en outre que les prêteurs fixent les taux et les décotes en tenant compte du risque de contrepartie et de la volatilité de la valeur de marché des actifs donnés en garantie.
title: Modeling Fluctuations in the Global Demand for Commodities
Creators: name: Kilian, Lutz
name: Zhou, Xiaoqing
Publisher: name: Bank of Canada
Year: 2018

description: It is widely understood that the real price of globally traded commodities is determined by the forces of demand and supply. One of the main determinants of the real price of commodities is shifts in the demand for commodities associated with unexpected fluctuations in global real economic activity. There have been numerous proposals for quantifying global real economic activity. We discuss which criteria a measure of global real activity must satisfy to be useful for modeling industrial commodity prices, we examine which of the many alternative measures in the literature are most suitable for applied work, and we explain why some popular measures are inappropriate for modeling commodity prices. Given these insights, we re-examine in detail whether global real economic activity has declined since 2011 and by how much. Drawing on a range of new evidence, we show that the global commodity price boom of the 2000s appears to have been largely transitory. Our analysis has important implications for the design of structural models of commodity markets, for the analysis of the transmission of commodity price shocks to commodity-importing and -exporting economies, and for commodity price forecasting.
description: Il est bien connu que les prix réels des produits de base qui s’échangent sur les marchés internationaux sont déterminés par les forces de l’offre et de la demande. L’un des principaux déterminants des prix réels des produits de base est la variation de la demande associée à des fluctuations imprévues de l’activité économique réelle mondiale. De nombreuses mesures ont été proposées pour quantifier l’activité économique réelle. Nous analysons les critères qu’elles doivent respecter pour permettre la modélisation des prix des produits de base industriels. Nous examinons également les différentes mesures présentées dans la littérature afin de déterminer lesquelles conviennent le mieux aux travaux empiriques, et nous expliquons pourquoi certaines mesures souvent utilisées sont inadéquates pour la modélisation des prix des produits de base. À la lumière de ces renseignements, nous réévaluons rigoureusement s’il y a eu une baisse de l’activité économique réelle mondiale depuis 2011 et, le cas échéant, l’ampleur de celle-ci. En nous fondant sur un éventail de nouvelles données, nous montrons que l’envolée des prix des produits de base observée à l’échelle mondiale dans les années 2000 a été essentiellement temporaire. Notre analyse a d’importantes répercussions sur la conception de modèles structurels des marchés des produits de base, sur l’analyse de la transmission des chocs des prix des produits de base aux pays importateurs et exportateurs de matières premières, et sur les prévisions des prix des produits de base.
Which chiral symmetry is restored in hot QCD?
Creators: name: Shuryak, Edward
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We review the current status of the problem of chiral symmetry restoration, discussing an open question of whether at the $SU(N_f)_A$ restoration point $T=T_c$ the $U(1)_A$ chiral symmetry is or is not (approximately) restored. New lattice and instanton-based studies are considered, and some new calculations are suggested to clarify the issue. We also speculate on possible experimental manifestations of two possible scenarios.
Local Vertex Colouring Graph Neural Networks
Creators: name: Li, Shouheng
name: Kim, Dongwoo
name: Wang, Qing
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In recent years, there has been a significant amount of research focused on expanding the expressivity of Graph Neural Networks (GNNs) beyond the Weisfeiler-Lehman (1-WL) framework. While many of these studies have yielded advancements in expressivity, they have frequently come at the expense of decreased efficiency or have been restricted to specific types of graphs. In this study, we investigate the expressivity of GNNs from the perspective of graph search. Specifically, we propose a new vertex colouring scheme and demonstrate that classical search algorithms can efficiently compute graph representations that extend beyond the 1-WL. We show the colouring scheme inherits useful properties from graph search that can help solve problems like graph biconnectivity. Furthermore, we show that under certain conditions, the expressivity of GNNs increases hierarchically with the radius of the search neighbourhood. To further investigate the proposed scheme, we develop a new type of GNN based on two search strategies, breadth-first search and depth-first search, highlighting the graph properties they can capture on top of 1-WL. Our code is available at https://github.com/seanli3/lvc.
description: 22 pages, 8 figures
Dynamical and evolutionary constraints on the nature and origin of hypervelocity stars
Creators: name: Perets, Hagai B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In recent years several hypervelocity stars (HVSs) have been observed in the halo of our Galaxy. Such stars are thought to be ejected through dynamical interactions near the massive black hole (MBH) in the Galactic center. Three scenarios have been suggested for their ejection; binary disruption by a MBH, scattering by inspiraling IMBH and scattering by stellar BHs close to MBH. These scenarios involve different stellar populations in the Galactic center. Here we use observations of the Galactic center stellar population together with dynamical and evolutionary arguments to obtain strong constraints on the nature and origin of HVSs. We show that the IMBH inspiral scenario requires too many (O(10^3)) main sequence B stars to exist close to the MBH (<0.01 pc) at the time of inspiral, where current observations show O(10) such stars. Scattering by SBHs also require too many B stars to be observed in the GC, but it may contribute a small fraction of the currently observed HVSs. The binary disruption scenario is still consistent with current observations. In addition it is shown that recently suggested signatures for HVSs origin such as hypervelocity binaries and slow rotating HVSs are much weaker than suggested and require too large statistics. In addition, we show that due to the conditions close to the MBH most binary star systems are not expected to survive for long in this region. Consequently, unique stellar populations that require long evolution in binaries are not expected to be ejected as HVSs in the BHs scattering mechanisms (this may also be related to to the recently observed asymmetry in the velocity distribution of HVSs).
description: 7 pages, 2 figures. Conclusions strengthened, accepted to ApJ
Basins of attraction of equilibrium points in the planar circular restricted five-body problem
Creators: name: Zotos, Euaggelos E.
name: Suraj, Md Sanam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We numerically explore the Newton-Raphson basins of convergence, related to the libration points (which act as attractors), in the planar circular restricted five-body problem (CR5BP). The evolution of the position and the linear stability of the equilibrium points is determined, as a function of the value of the mass parameter. The attracting regions, on several types of two dimensional planes, are revealed by using the multivariate version of the classical Newton-Raphson iterative method. We perform a systematic investigation in an attempt to understand how the mass parameter affects the geometry as well as the degree of fractality of the basins of attraction. The regions of convergence are also related with the required number of iterations and also with the corresponding probability distributions.
description: Published in Astrophysics and Space Science (A&SS) journal. Previous paper with related context: arXiv:1801.00710
An Empirical Framework for Large-Scale Policy Analysis, with an Application to School Finance Reform in Michigan
Creators: name: Ferreyra, Maria Marta
Publisher: name: Carnegie Mellon University
Year: 1993
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: In this paper, I develop an empirical framework for the analysis of large-scale policies, and apply it to study the effects of school finance reform on the Detroit metropolitan area. Exploiting school finance reform in Michigan in 1994, I estimate a general equilibrium model of multiple jurisdictions with 1990 data from Detroit, predict the 2000 equilibrium, and compare this prediction with 2000 data to validate the model. I conduct counterfactual simulations using the estimates. According to my analysis, feasible revenue-based reforms that ensure spending equity or adequacy have little impact on school quality or household demographics in Detroit.
title: Speed Segmentation on Exchanges: Competition for Slow Flow
Creators: name: Anderson, Lisa
name: Andrews, Emad
name: Devani, Baiju
name: Mueller, Michael
name: Walton, Adrian
Publisher: name: Bank of Canada
Year: 2018

description: In 2015, TSX Alpha, a Canadian stock exchange, implemented a speed bump for marketable orders and an inverted fee structure as part of a redesign. We find no evidence that this redesign impacted market-wide measures of trading costs or contributed appreciably to segmenting retail order flow away from other Canadian venues with a maker-taker fee structure. This suggests that Alpha attracts already-segmented flow from venues with fee structures other than maker-taker. Some heavy users of Alpha trade off improvements in fill rates and execution size against mildly larger effective spreads and price impacts. These heavy users also utilize larger market orders and fewer spray orders.
description: La bourse canadienne Alpha TSX a instauré en 2015, dans le cadre de l’adoption d’un nouveau modèle, un délai de traitement (« ralentisseur ») des ordres négociables et un barème de droits inversé. Rien n’indique que ce nouveau modèle a eu une incidence sur les mesures des coûts de transaction à l’échelle du marché ou qu’il a contribué notablement à segmenter les flux d’ordres de détail en les détournant d’autres plateformes de négociation canadiennes qui appliquent un modèle de tarification teneur-preneur. Ce constat donne à penser qu’Alpha attire des flux déjà segmentés en provenance de plateformes utilisant des barèmes de droits autres que le modèle précité. Certains gros utilisateurs d’Alpha opèrent un arbitrage entre, d’une part, une hausse des taux d’exécution et de la taille des ordres et, d’autre part, une légère accentuation des écarts effectifs et de l’incidence sur les cours. Ces gros utilisateurs exécutent aussi des ordres au mieux de plus grande taille et ont moins recours à la méthode d’acheminement des ordres par éparpillement.
Observe matter falling into a black hole
Creators: name: Zhang, Shuang Nan
name: Liu, Yuan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It has been well known that in the point of view of a distant observer, all in-falling matter to a black hole (BH) will be eventually stalled and "frozen" just outside the event horizon of the BH, although an in-falling observer will see the matter falling straight through the event horizon. Thus in this "frozen star" scenario, as distant observers, we could never observe matter falling into a BH, neither could we see any "real" BH other than primordial ones, since all other BHs are believed to be formed by matter falling towards singularity. Here we first obtain the exact solution for a pressureless mass shell around a pre-existing BH. The metrics inside and interior to the shell are all different from the Schwarzschild metric of the enclosed mass. The metric interior to the shell can be transformed to the Schwarzschild metric for a slower clock which is dependent of the location and mass of the shell. Another result is that there does not exist a singularity nor event horizon in the shell. Therefore the "frozen star" scenario is incorrect. We also show that for all practical astrophysical settings the in-falling time recorded by an external observer is sufficiently short that future astrophysical instruments may be able to follow the whole process of matter falling into BHs. The distant observer could not distinguish between a "real" BH and a "frozen star", until two such objects merge together. It has been proposed that electromagnetic waves will be produced when two "frozen stars" merge together, but not true when two "real" bare BHs merge together. However gravitational waves will be produced in both cases. Thus our solution is testable by future high sensitivity astronomical observations.
description: 7 pages, 2 figures. Proceeding of the conference "Astrophysics of Compact Objects", 1-7 July, Huangshan, China. Abridged abstract
Non-removability of the Sierpinski Gasket
Creators: name: Ntalampekos, Dimitrios
Publisher: name: arXiv
Year: 2018
Subjects: subject: Metric Geometry (math.MG)
subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C62 (Primary) 46E35, 30L10, 51F99 (Secondary)

description: We prove that the Sierpiński gasket is non-removable for quasiconformal maps, thus answering a question of Bishop. The proof involves a new technique of constructing an exceptional homeomorphism from $\mathbb R^2$ into some non-planar surface $S$, and then embedding this surface quasisymmetrically back into the plane by using the celebrated Bonk-Kleiner Theorem arXiv:math/0107171. We also prove that all homeomorphic copies of the Sierpiński gasket are non-removable for continuous Sobolev functions of the class $W^{1,p}$ for $1\leq p\leq 2$, thus complementing and sharpening the results of the author's previous work arXiv:1706.07687.
description: 61 pages, 9 figures
Geophysikalische Prospektionsmethoden und digitale Nachhaltigkeit in der Archäologie
Creators: name: Rutishauser, Susanne
name: Brunner, Mirco
Publisher: name: Zenodo
Year: 2019

description: Förderung Innovative Lehre (FIL) Die Universität vergibt im Rahmen des FIL-Projekts Personalpunkte (PP) an teilnehmende Institute. Dadurch erhalten Sie als Dozierende/r bzw. Projektverantwortliche/r zeitliche Freiräume für die Konzeption, Durchführung und Evaluation eines innovativen Lehrprojekts. Mögliche Ansätze sind bspw. die Neukonzeption einer Lehrveranstaltung, die Adaptation eines Prüfungsformats, die Optimierung der Kombination von Präsenz- und Selbststudium, die Einführung von Blended-Learning-Angeboten, die Entwicklung von E-Learning-Einheiten usw. Unter Projektantrag finden Sie den Leitfaden mit detaillierten Informationen zum FIL-Projekt sowie das entsprechende Antragsformular. https://www.gutelehre.unibe.ch/projekte___foerdermassnahmen/foerderung_innovative_lehre_fil
An Efficient Cost-Sharing Mechanism for the Prize-Collecting Steiner Forest Problem
Creators: name: Gupta, Anupam
name: J.  Könemann
name: S.  Leonardi
name: Ramamoorthi Ravi
name: G.  Schäfer
Publisher: name: Carnegie Mellon University
Year: 1984
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Tepper School of Business
Stability, well-posedness and blow-up criterion for the Incompressible Slice Model
Creators: name: Alonso-Orán, Diego
name: de León, Aythami Bethencourt
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In atmospheric science, slice models are frequently used to study the behaviour of weather, and specifically the formation of atmospheric fronts, whose prediction is fundamental in meteorology. In 2013, Cotter and Holm introduced a new slice model, which they formulated using Hamilton's variational principle, modified for this purpose. In this paper, we show the local existence and uniqueness of strong solutions of the related ISM (Incompressible Slice Model). The ISM is a modified version of the Cotter-Holm Slice Model (CHSM) that we have obtained by adapting the Lagrangian function in Hamilton's principle for CHSM to the Euler-Boussinesq Eady incompressible case. Besides proving local existence and uniqueness, in this paper we also construct a blow-up criterion for the ISM, and study Arnold's stability around a restricted class of equilibrium solutions. These results establish the potential applicability of the ISM equations in physically meaningful situations.
description: New version: Arnold's stability section included, typos corrected, figures included