cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Circadian patterns of Wikipedia editorial activity: A demographic analysis
Creators: name: Yasseri, Taha
name: Sumi, Róbert
name: Kertész, János
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Wikipedia (WP) as a collaborative, dynamical system of humans is an appropriate subject of social studies. Each single action of the members of this society, i.e. editors, is well recorded and accessible. Using the cumulative data of 34 Wikipedias in different languages, we try to characterize and find the universalities and differences in temporal activity patterns of editors. Based on this data, we estimate the geographical distribution of editors for each WP in the globe. Furthermore we also clarify the differences among different groups of WPs, which originate in the variance of cultural and social features of the communities of editors.
A Monte Carlo study of surface sputtering by dual and rotated ion beams
Creators: name: Yasseri, Taha
name: Kree, Reiner
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Several, recently proposed methods of surface manufacturing based on ion beam sputtering, which involve dual beam setups, sequential application of ion beams from different directions, or sample rotation, are studied with the method of kinetic Monte Carlo simulation of ion beam erosion and surface diffusion. In this work, we only consider erosion dominated situations. The results are discussed by comparing them to a number of theoretical propositions and to experimental findings. Two ion-beams aligned opposite to each other produce stationary, symmetric ripples. Two ion beams crossing at right angle will produce square patterns only, if they are exactly balanced. In all other cases of crossed beams, ripple patterns are created, and their orientations are shown to be predictable from linear continuum theory. In sequential ion beam sputtering we find a very rapid destruction of structures created from the previous beam direction after a rotation step, which leads to a transient decrease of overall roughness. Superpositions of patterns from several rotation steps are difficult to obtain, as they exist only in very short time windows. In setups with a single beam directed towards a rotating sample, we find a non-monotonic dependence of roughness on rotation frequency, with a very pronounced minimum appearing at the frequency scale set by the relaxation of prestructures observed in sequential ion beam setups. Furthermore we find that the logarithm of the height of structures decreases proportional to the inverse frequency.
Brücken zwischen elementaren mathematischen Kontexten
Creators: name: Berendonk, Stephan
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: "Polynome verhalten sich wie ganze Zahlen". Diese fantastische Beobachtung schlägt eine Brücke zwischen dem Kontext der Funktionen und dem Kontext der Zahlen, zwischen algebraischer Geometrie und Zahlentheorie. Der Fund einer solchen Analogie eröffnet neue Möglichkeiten: Begriffe und Argumentationen die zunächst nur aus einem der Kontexte bekannt sind, können möglicherweise bewusst in den anderen Kontext übertragen werden und führen dort zu neuen Resultaten. Bei der Fortentwicklung der Mathematik spielen solche Brücken zwischen verschiedenen Kontexten eine wesentliche Rolle; eine Tatsache, die sich in der Schulmathematik nicht widerspiegelt. Im folgenden Beitrag werden daher einige elementare und für den Schulunterricht geeignete Beispiele mit "Brückencharakter" vorgestellt und es wird geschaut, inwiefern die jeweilige Brücke für weiteren Erkenntnisgewinn nutzbar gemacht werden kann.
Degravitation of the Cosmological Constant in Bigravity
Creators: name: Platscher, Moritz
name: Smirnov, Juri
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article the phenomenon of degravitation of the cosmological constant is studied in the framework of bigravity. It is demonstrated that despite a sizable value of the cosmological constant its gravitational effect can be only mild. The bigravity framework is chosen for this demonstration as it leads to a consistent, ghost-free theory of massive gravity. We show that degravitation takes place in the limit where the physical graviton is dominantly a gauge invariant metric combination. We present and discuss several phenomenological consequences expected in this regime.
description: 17 pages; v2 contains extended discussion on more general solutions; content matches published version
Antioxidant and antiulcer potential of aqueous leaf extract of Kigelia africana against ethanol-induced ulcer in rats
Creators: name: Dos Santos, Matheus M.
name: Olaleye, Mary T.
name: Ineu, Rafael P.
name: Boligon, Aline A.
name: Athayde, Margareth L.
name: Barbosa, Nilda B. V.
name: Rocha, João B. T.
Publisher: name: Technische Universität Dortmund
Year: 2014
Subjects: subject: Kigelia africana
subject: gastric damage
subject: antioxidant activity
subject: flavonoids
subject: ethanol
subject: antiulcerogenic potential
subject: 610

description: Ethnobotanical claims regarding Kigelia africana reported antiulcer properties as part of its medicinal application. In this work, aqueous leaf extract from K. africana was investigated for its phytochemical constituents and antiulcer potential against ethanol-induced ulcer in rats. The participation of oxidative stress on ethanol-induced ulcer and the potential protective antioxidant activity of K. africana extracts were investigated by determining vitamin C and thiobarbituric acid reactive species (TBARS) contents in the gastric mucosa of rats. The HPLC analysis showed the presence of gallic acid, chlorogenic acid, caffeic acid and also the flavonoids rutin, quercetin and kaempferol in the aqueous plant extract. Oral treatment with K. africana extract (1.75; 3.5; 7 and 14mg/kg) one hour after ulcer induction with ethanol decreased in a dose dependent manner the ulcer index. Ethanol increased significantly stomachal TBARS levels and decreased vitamin C content when compared to the control animals. K. africana blunted the ethanol-induced oxidative stress and restored vitamin C content to the control levels. The present results indicate that the aqueous leaf extract from K. africana possesses antiulcer potential. The presence of flavonoids in plant extract suggests that its antiulcerogenic potential is associated with antioxidant activity. Of particular therapeutic potential, K. africana was effective against ethanol even after the induction of ulcer, indicating that it can have protective and curative effects against gastric lesion.
description: EXCLI Journal ; Vol. 13, 2014
Can social microblogging be used to forecast intraday exchange rates?
Creators: name: Papaioannnou, Panagiotis
name: Russo, Lucia
name: Papaioannou, George
name: Siettos, Constantinos
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: The Efficient Market Hypothesis (EMH) is widely accepted to hold true under certain assumptions. One of its implications is that the prediction of stock prices at least in the short run cannot outperform the random walk model. Yet, recently many studies stressing the psychological and social dimension of financial behavior have challenged the validity of the EMH. Towards this aim, over the last few years, internet-based communication platforms and search engines have been used to extract early indicators of social and economic trends. Here, we used Twitter's social networking platform to model and forecast the EUR/USD exchange rate in a high-frequency intradaily trading scale. Using time series and trading simulations analysis, we provide some evidence that the information provided in social microblogging platforms such as Twitter can in certain cases enhance the forecasting efficiency regarding the very short (intradaily) forex.
description: This is a prior version of the paper published at NETNOMICS. The final publication is available at http://www.springer.com/economics/economic+theory/journal/11066
Assessment of Construction Project Management Control Practice: The Case of Grade One Building and General Contractors in Addis Ababa
Creators: name: Alemayehu, Hiwot
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Construction industry in developing countries is struggling from different challenges that can affect the industry from achiving the intended objective which is to complete the construction works on time,as per the budget and desired quality.From the different process that help the industry to be sucessful,the construction control practice of contractors contributes a faire share in the sucess of the projects.As per the reviewed litratures ,there exist a gap in the construction control practices in Ethiopian construction industry.Bearing this in mind , this research is conducted to asses the current construction controlling tools and techniques used by grade one contractors with respect to the tools and techniques described in PMBOK.The research is of descriptive type and uses questionnaire and interview as an instrument to collect data.The analysis of the research shows the percentage and frequency of used construction controlling techniques.Also in order to rank the techniques that the contractors use, RII is used as a method of analysis.The finding of the research elaborates that mostly used tools and techniques are project management software to control time and cost of projects and inspection to control the quality of construction projects.Also, the finding revealed that different types of controlling techniques are not used by most of the contractors.Furthermore as per the research,even though there exists a lack of usage of different construction controlling tools and techniques,the professionals in the construction firm perceive that they have a good construction controlling system.From the finding of the research the researcher recommends the contractors to practice different controlling techniques that best fit their construction projects
Dynamics of conflicts in Wikipedia
Creators: name: Yasseri, Taha
name: Sumi, Robert
name: Rung, András
name: Kornai, András
name: Kertész, János
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In this work we study the dynamical features of editorial wars in Wikipedia (WP). Based on our previously established algorithm, we build up samples of controversial and peaceful articles and analyze the temporal characteristics of the activity in these samples. On short time scales, we show that there is a clear correspondence between conflict and burstiness of activity patterns, and that memory effects play an important role in controversies. On long time scales, we identify three distinct developmental patterns for the overall behavior of the articles. We are able to distinguish cases eventually leading to consensus from those cases where a compromise is far from achievable. Finally, we analyze discussion networks and conclude that edit wars are mainly fought by few editors only.
description: Supporting information added
The Accurate Particle Tracer Code
Creators: name: Wang, Yulei
name: Liu, Jian
name: Qin, Hong
name: Yao, Zhi Yu ans Yicun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The Accurate Particle Tracer (APT) code is designed for large-scale particle simulations on dynamical systems. Based on a large variety of advanced geometric algorithms, APT possesses long-term numerical accuracy and stability, which are critical for solving multi-scale and non-linear problems. Under the well-designed integrated and modularized framework, APT serves as a universal platform for researchers from different fields, such as plasma physics, accelerator physics, space science, fusion energy research, computational mathematics, software engineering, and high-performance computation. The APT code consists of seven main modules, including the I/O module, the initialization module, the particle pusher module, the parallelization module, the field configuration module, the external force-field module, and the extendible module. The I/O module, supported by Lua and Hdf5 projects, provides a user-friendly interface for both numerical simulation and data analysis. A series of new geometric numerical methods and key physical problems, such as runaway electrons in tokamaks and energetic particles in Van Allen belt, have been studied using APT. As an important realization, the APT-SW version has been successfully distributed on the world's fastest computer, the Sunway TaihuLight supercomputer, by supporting master-slave architecture of Sunway many-core processors.
The ground truth about metadata and community detection in networks
Creators: name: Peel, Leto
name: Larremore, Daniel B.
name: Clauset, Aaron
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Across many scientific domains, there is a common need to automatically extract a simplified view or coarse-graining of how a complex system's components interact. This general task is called community detection in networks and is analogous to searching for clusters in independent vector data. It is common to evaluate the performance of community detection algorithms by their ability to find so-called "ground truth" communities. This works well in synthetic networks with planted communities because such networks' links are formed explicitly based on those known communities. However, there are no planted communities in real world networks. Instead, it is standard practice to treat some observed discrete-valued node attributes, or metadata, as ground truth. Here, we show that metadata are not the same as ground truth, and that treating them as such induces severe theoretical and practical problems. We prove that no algorithm can uniquely solve community detection, and we prove a general No Free Lunch theorem for community detection, which implies that there can be no algorithm that is optimal for all possible community detection tasks. However, community detection remains a powerful tool and node metadata still have value so a careful exploration of their relationship with network structure can yield insights of genuine worth. We illustrate this point by introducing two statistical techniques that can quantify the relationship between metadata and community structure for a broad class of models. We demonstrate these techniques using both synthetic and real-world networks, and for multiple types of metadata and community structure.
description: 27 pages, 10 figures, 11 tables
Tuning the average path length of complex networks and its influence to the emergent dynamics of the majority-rule model
Creators: name: Reppas, Andreas I.
name: Spiliotis, Konstantinos
name: Siettos, Constantinos I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We show how appropriate rewiring with the aid of Metropolis Monte Carlo computational experiments can be exploited to create network topologies possessing prescribed values of the average path length (APL) while keeping the same connectivity degree and clustering coefficient distributions. Using the proposed rewiring rules we illustrate how the emergent dynamics of the celebrated majority-rule model are shaped by the distinct impact of the APL attesting the need for developing efficient algorithms for tuning such network characteristics.
description: 10 figures
Impact Assessment of Interventions on Agriculture Commercialization Cluster Program: A Case Study of Malt Barley Cluster in Oromia Region
Creators: name: Ephrem, Emenet
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The objective of this study was to analyze the potential impact of interventions on Agricultural Commercialization Clusters (ACCs) of malt barley in Arsi Zone, Oromia region. It also had a specific objective of investigating analyzing the impact that were observed after the smallholder farmers participated in the ACCs through descriptive analysis. This research used quantitative approach and followed descriptive research approach on the analysis of ACC that is a relatively new concept in Ethiopia. The findings of this study indicate that more than half of the participants (62%) have observed an impact on their livelihood after participating on the ACCs. This impact observed was analyzed in the aspect of crop quality, production quantity, productivity, cost of production, and investment. Based on the findings of this study it is recommended that; ATA should give attention to creating awareness about the importance of market linkage amongst the value chain actors of the ACCs and work on improving the network of suppliers and consumers while maximizing the coverage of the beneficiaries within ACCs. The stakeholders involved in the ACC value chain should also work together to ensure on time supply of quality products to maximize the impact of the interventions on the ACCs. Finally, significant attention and support should be provided to improve the collaboration of the government institutions. Further study is also recommended on the correlation of the interventions individually with the different components of the results of ACCs. The level of commercialization should also be investigated to understand to what extent the intervention is helping the Agricultural clusters in the commercialization process. This could be achieved through longitudinal, multidimensional, and comprehensive analysis.
The Spectrum of Static Subtracted Geometries
Creators: name: Andrade, Tomas
name: Castro, Alejandra
name: Cohen-Maldonado, Diego
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Subtracted geometries are black hole solutions of the four dimensional STU model with rather interesting ties to asymptotically flat black holes. A peculiar feature is that the solutions to the Klein-Gordon equation on this subtracted background can be organized according to representations of the conformal group $SO(2,2)$. We test if this behavior persists for the linearized fluctuations of gravitational and matter fields on static, electrically charged backgrounds of this kind. We find that there is a subsector of the modes that do display conformal symmetry, while some modes do not. We also discuss two different effective actions that describe these subtracted geometries and how the spectrum of quasinormal modes is dramatically different depending upon the action used.
description: 30 pages, 2 figures. v2: references added. v3: minor corrections to match with published version
Responsabilidad social del revisor fiscal frente al medio ambiente
Creators: name: Blanco Reyes, Irina Del Carmen
name: Cervantes Aparicio, Wilma
Publisher: name: Universidad de Cartagena
Year: 2011
Subjects: Revisoria fiscal - Responsabilidad social
Responsabilidad Social - Colombia

description: Monografia (Especialista en Revisoría Fiscal).--Universidad de Cartagena. Facultad de Ciencias Económicas. Departamento de Postgrados, 2011
description: Con este trabajo de grado se pretende evaluar la responsabilidad y pertinencia del pronunciamiento del Revisor Fiscal en sus dictámenes con respecto al impacto que sobre el medio ambiente genera la cadena productiva de bienes y servicios por parte de los entes económicos, de manera que permita tomar las medidas necesarias que sensibilicen y regulen el actuar del profesional de la contaduría pública frente a dicha situación.
A practical approach to language complexity: a Wikipedia case study
Creators: name: Yasseri, Taha
name: Kornai, András
name: Kertész, János
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computation and Language (cs.CL)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this paper we present statistical analysis of English texts from Wikipedia. We try to address the issue of language complexity empirically by comparing the simple English Wikipedia (Simple) to comparable samples of the main English Wikipedia (Main). Simple is supposed to use a more simplified language with a limited vocabulary, and editors are explicitly requested to follow this guideline, yet in practice the vocabulary richness of both samples are at the same level. Detailed analysis of longer units (n-grams of words and part of speech tags) shows that the language of Simple is less complex than that of Main primarily due to the use of shorter sentences, as opposed to drastically simplified syntax or vocabulary. Comparing the two language varieties by the Gunning readability index supports this conclusion. We also report on the topical dependence of language complexity, e.g. that the language is more advanced in conceptual articles compared to person-based (biographical) and object-based articles. Finally, we investigate the relation between conflict and language complexity by analyzing the content of the talk pages associated to controversial and peacefully developing articles, concluding that controversy has the effect of reducing language complexity.
description: 2 new figures, 1 new section, and 2 new supporting texts
A brief overview of the sock matching problem
Creators: name: Pantić, Bojana
name: Bodroža-Pantić, Olga
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This short note deals with the so-called $ Sock \; Matching \; Problem$. We define $B_{n,k}$ as the number of all the finite sequences $a_1, \ldots, a_{2n}$ of nonnegative integers which contain at least one occurrence of $k$ $(1 \leq k \leq n)$ and for which $a_1 = 1 $, $a_{2n}=0$ and $ \mid a_i -a_{i+1}\mid \; = 1$. The value $a_i$ can be interpreted as the number of unmatched socks being present after having drawn the first $i$ socks randomly out of the pile which initially contained $n$ pairs of socks. Here, establishing a link between this problem and with both some old and some new results, related to the number of restricted Dyck paths, we obtain a few valid forms of the sock matching theorem and prove that the probability for $k$ unmatched socks to appear (in the very process of drawing one sock at a time) approaches $1$ as the number of socks becomes large enough.
description: 10 pages, 2 figures
Concepciones de responsabilidad social empresarial en la gran empresa de Cartagena de indias: Eje orientador para definir prácticas que promueven o no, el desarrollo social en las personas, grupos o comunidades
Creators: name: Julio Mendoza, Zuleima
name: Ulloque Cuadros, Diana Carolina
Publisher: name: Universidad de Cartagena
Year: 2014
Subjects: Trabajo social de grupo

description: Tesis (Trabajador Social) -- Universidad de Cartagena. Facultad de Ciencias Sociales y Educación. Programa de Trabajo Social, 2014
description: La investigación como base inteligente de nuestros ser y quehacer profesional, nos permite acercarnos a la realidad social de manera crítica y reflexiva. Más allá de intervenir a sujetos sociales de forma experimental, intenta indagar y comprender la realidad a fin de generar transformaciones en ella. Las líneas que se presentan a continuación describen un proyecto de investigación que busca conocer las concepciones que sobre responsabilidad social han construido los grandes empresarios instalados en Cartagena de indias, y que constituyen el marco en el cual definen sus acciones en términos de desarrollo social para las comunidades, grupos o personas de su área de influencia. Para esta investigación se escogió una muestra de siete (7) empresas, Ecopetrol, Argos, Puerto Mamonal, Compas, Greif Colombia, Polibán Internacional S.A. y Fundación Mamonal; y a su vez fueron seleccionadas cinco (5) comunidades del área de influencias de estas empresas, tales como Membrillal, Arroz Barato, Puerta De Hierro, Pasacaballos, Policarpa guiados por unos criterios de liderazgo, participación, influencia social, reconocimiento, tamaño, etc. Esta experiencia investigativa pretende desde el dialogo racional con los empresarios de las grandes empresas de Cartagena y las comunidades de su área de influencia, reflexionar sobre las acciones o prácticas que al interior de las mismas se conocen como “responsabilidad social empresarial”, teniendo como fundamentación, las concepciones que sobre RS construyen, al considerarlas como la plataforma que guía su hacer, sea por la gestión social que implementan de manera directa o terciarisada. Por último, y como producto de la praxis de trabajo social realizada desde este proyecto de investigación, se presenta a consideración una guía dirigida a la gran CONCEPCIONES DE RESPONSABILIDAD SOCIAL EMPRESARIAL EN LA GRAN EMPRESA DE CARTAGENA DE INDIAS: Eje orientador para definir prácticas que promueven o no, el Desarrollo Social en las personas, grupos o comunidades. empresa, brindando unos direccionamientos que le permitan implementar de manera conjunta con las comunidades verdaderas acciones de responsabilidad social empresarial. Dicha guía contiene principios, características y beneficios de una empresa socialmente responsable y seis (6) fases metodológicas flexibles para llegar hacerlo.
Towards levelling up the EIP-AGRI – a common framework for multilevel functional capacity development
Creators: name: Van Dijk, Lisa
name: Von Münchhausen, Susanne
name: Fieldsend, Andrew
name: Redman, Mark
Publisher: name: Zenodo
Year: 2023
Subjects: AKIS
Innovation
Innovation support
EU Common Agricultural Policy
Rural Development
Capacity Buildling
Agriculture
Forestry

description: This Policy Brief is the result of cooperation between the two European Union funded projects LIAISON and PREMIERE. PREMIERE (Preparing Multi-Actor Projects in a Co-Creative Way) receives funding from the Horizon Europe research and innovation programme. It aims to foster the development of sound, coherent and well-prepared multi-actor projects for
 innovation in agriculture, forestry, and rural businesses.
 LIAISON (Better Rural Innovation: Linking Actors, Instruments and Policies through Networks) received funding from the previous Horizon 2020 research and innovation programme. It aimed to develop methods and tools for the enhancement of the EIP-Agri, an initiative launched by the European Commission in 2012 with its goal of fostering competitive and sustainable agriculture and
 forestry that “achieves more and better from less”.
Kopienband: Mystische Schriften
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1436

description: Mystische Predigten, Gebete und Andachten, vom Lateinischen ins alemannische Deutsche übersetzt: f. 1r-273r Passionstraktat (Ableger von Nicolaus Schulmeister); f. 273v-283r Messerklärung "Sider nu die heilig messe"; f. 283v-310v Katechetische Sammlung, enthält Dekalog, Sieben Todsünden, Sieben Sakramente etc. / Von einer Hand geschrieben, rubriziert, f. 1r grosse O-Initiale mit figürlicher Federzeichnung, 13 Bildfreiräume ausgespart, teilweise falsch foliiert / Holzdeckel mit weissem Leder überzogen, Spur einer Schliesse.
Opinions, Conflicts and Consensus: Modeling Social Dynamics in a Collaborative Environment
Creators: name: Török, János
name: Iñiguez, Gerardo
name: Yasseri, Taha
name: Miguel, Maxi San
name: Kaski, Kimmo
name: Kertész, János
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Information-communication technology promotes collaborative environments like Wikipedia where, however, controversiality and conflicts can appear. To describe the rise, persistence, and resolution of such conflicts we devise an extended opinion dynamics model where agents with different opinions perform a single task to make a consensual product. As a function of the convergence parameter describing the influence of the product on the agents, the model shows spontaneous symmetry breaking of the final consensus opinion represented by the medium. In the case when agents are replaced with new ones at a certain rate, a transition from mainly consensus to a perpetual conflict occurs, which is in qualitative agreement with the scenarios observed in Wikipedia.
description: 6 pages, 5 figures. Submitted for publication
Porträtzeichnung von Jacob Burckhardt
Creators: name: Lendorff, Hans
Publisher: name: [s.n.]
Year: 1895
Subjects: Burckhardt, Jacob1818-1897JacobBurckhardt

description: Das Passepartout trägt die Aufschrift: "Jacob Burckhardt. Nach der Natur gezeichnet von Hans Lendorff, Juni 1895"
description: von Hans Lendorff
description: Öffentliche Bibliothek der Universität Basel
description: *65,807
description: Deutsch
description: Vgl. die Sign. NL 13 : 36, c
Gagea helenae Grossh.
Creators: name: Tekşen, Mehtap
name: Erkul, Seher Karaman
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Liliales
Liliaceae
Gagea
Gagea helenae

description: Gagea helenae Grossh. in Grossheim & Schischk., Sched. Herb. Pl. Or. Exsicc. 10 (1924)
 Type (lectotype designated by Stroh 1937: 498): — GEORGIA. Udzo, 10 April 1922, A. Grossheim s.n. (B, isotype LE!).
 Specimens seen: — TURKEY. Van: Hoşap-Van, 6.5 km from Hoşap, steppe, 1947 m, 27 April 2011, M. Tekşen 2791 & S. Karaman (AKSU!); Hoşap-Van, 12 km from Hoşap, steppe, 1950 m, 27 April 2011, M. Tekşen 2795 & S. Karaman (AKSU!); Güzelsu, 15 km from Hoşap to Van, rocky places, 1990 m, 19 May 2013, M. Tekşen 2918 & S. Karaman (AKSU!); Özalp, W of Yavuzlar village, meadows, 2240 m, 5 May 1997, F. Özgökçe 1218 (VANF!).
 Flowering time: — April–May.
 Habitat: — Rocky places, steppe, 1800–1970 m.
 Distribution: — Irano-Turanian element. Turkey (East Anatolia), Transcaucasia and North Caucasia (Govaerts 2015).
description: Published as part of Tekşen, Mehtap & Erkul, Seher Karaman, 2015, The synopsis of the genus Gagea (Liliaceae) in Turkey, pp. 101-129 in Phytotaxa 230 (1) on page 117, DOI: 10.11646/phytotaxa.230.2.1, http://zenodo.org/record/13630814
Value production in a collaborative environment
Creators: name: Yasseri, Taha
name: Kertész, János
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We review some recent endeavors and add some new results to characterize and understand underlying mechanisms in Wikipedia (WP), the paradigmatic example of collaborative value production. We analyzed the statistics of editorial activity in different languages and observed typical circadian and weekly patterns, which enabled us to estimate the geographical origins of contributions to WPs in languages spoken in several time zones. Using a recently introduced measure we showed that the editorial activities have intrinsic dependencies in the burstiness of events. A comparison of the English and Simple English WPs revealed important aspects of language complexity and showed how peer cooperation solved the task of enhancing readability. One of our focus issues was characterizing the conflicts or edit wars in WPs, which helped us to automatically filter out controversial pages. When studying the temporal evolution of the controversiality of such pages we identified typical patterns and classified conflicts accordingly. Our quantitative analysis provides the basis of modeling conflicts and their resolution in collaborative environments and contribute to the understanding of this issue, which becomes increasingly important with the development of information communication technology.
description: In press: Special Issue of Journal of Statistical Physics: Statistical Mechanics and Social Science
Smoothings and Rational Double Point Adjacencies for Cusp Singularities
Creators: name: Engel, Philip
name: Friedman, Robert
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: A cusp singularity is a surface singularity whose minimal resolution is a cycle of smooth rational curves meeting transversely. Cusp singularities come in naturally dual pairs. Looijenga proved in 1981 that if a cusp singularity is smoothable, the minimal resolution of the dual cusp is the anticanonical divisor of some smooth rational surface. In 1983, the second author and Miranda gave a criterion for smoothability of a cusp singularity, in terms of the existence of a K-trivial semistable model for the central fiber of such a smoothing. We study these "Type III degenerations" of rational surfaces with an anticanonical divisor--their deformations, birational geometry, and monodromy. Looijenga's original paper also gave a description of the rational double point configurations to which a cusp singularity deforms, but only in the case where the resolution of the dual cusp has cycle length 5 or less. We generalize this classification to an arbitrary cusp singularity, giving an explicit construction of a semistable simultaneous resolution of such an adjacency. The main tools of the proof are (1) formulas for the monodromy of a Type III degeneration, (2) a construction via surgeries on integral-affine surfaces of a degeneration with prescribed monodromy, (3) surjectivity of the period map for Type III central fibers, and (4) a theorem of Shepherd-Barron producing the simultaneous contraction to the adjacency of the cusp singularity.
description: Final version, 79 pages, 8 figures
Early Prediction of Movie Box Office Success based on Wikipedia Activity Big Data
Creators: name: Mestyán, Márton
name: Yasseri, Taha
name: Kertész, János
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Use of socially generated "big data" to access information about collective states of the minds in human societies has become a new paradigm in the emerging field of computational social science. A natural application of this would be the prediction of the society's reaction to a new product in the sense of popularity and adoption rate. However, bridging the gap between "real time monitoring" and "early predicting" remains a big challenge. Here we report on an endeavor to build a minimalistic predictive model for the financial success of movies based on collective activity data of online users. We show that the popularity of a movie can be predicted much before its release by measuring and analyzing the activity level of editors and viewers of the corresponding entry to the movie in Wikipedia, the well-known online encyclopedia.
description: 13 pages, Including Supporting Information, 7 Figures, Download the dataset from: http://wwm.phy.bme.hu/SupplementaryDataS1.zip
Estudio de factibilidad para la creación de una microempresa dedicada a la producción y comercialización de accesorios de bisuteria personalizados para mujeres entre los 15 y 55 años de la ciudad de Cartagena
Creators: name: Yance González, María Del Carmen
name: Corpas León, Yirina
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Estudio de mercado
Estudios de factibilidad
Estudio financiero
Localización

description: Tesis (Administrador de Empresas).--Universidad de Cartagena. Facultad de Ciencias Económicas. Programa de Administración de Empresas, 2016
description: El presente estudio tiene por objeto realizar un estudio de mercado que permita establecer la demanda potencial y las estrategias adecuadas para el mercado de bisutería personalizada en Cartagena.
Elliptic curves and continued fractions
Creators: name: Nikolaev, Igor V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 11G05, 46L85

description: It is proved that the rank of an elliptic curve is one less the arithmetic complexity of the corresponding non-commutative torus. As an illustration, we consider a family of elliptic curves with complex multiplication.
description: to appear in Aequationes Mathematicae
Distinguishing Kerr naked singularities and black holes using the spin precession of a test gyro in strong gravitational fields
Creators: name: Chakraborty, Chandrachur
name: Kocherlakota, Prashant
name: Patil, Mandar
name: Bhattacharyya, Sudip
name: Joshi, Pankaj S.
name: Królak, Andrzej
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study here the precession of the spin of a test gyroscope attached to a stationary observer in the Kerr spacetime, specifically, to distinguish naked singularity (NS) from black hole (BH). It was shown recently that for gyros attached to static observers, their precession frequency became arbitrarily large in the limit of approach to the ergosurface. For gyros attached to stationary observers that move with non-zero angular velocity $Ω$, this divergence at the ergosurface can be avoided. Specifically, for such gyros, the precession frequencies diverge on the event horizon of a BH, but are finite and regular for NS everywhere except at the singularity itself. Therefore a genuine detection of the event horizon becomes possible in this case. We also show that for a near-extremal NS ($1 1.089$ for a certain range of $r$. For $1
description: LaTex; 26 pages including 51 figures, thoroughly revised version, new sections and new references added, results and conclusions remain unchanged, accepted for publication in PRD
Geometrical and Kinematic Parameters of the Jet of the Blazar S5 0716+71 in a Helical-Jet Model
Creators: name: Butuzova, Marina S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Periodic variations of the position angle of the inner jet of the blazar S5 0716+71 suggest a helical structure for the jet. The geometrical parameters of a model helical jet are determined. It is shown that, when the trajectories of the jet components are non-ballistic, the angle between their velocity vectors and the line of sight lies in a broader interval than is the case for ballistic motions of the components, in agreement with available estimates. The contradictory results for the apparent speeds of components in the inner and outer jet at epochs 2004 and 2008-2010 can be explained in such a model. The ratio of the apparent speeds in the inner and outer jet is used to derive a lower limit for the true speed of the components ($β>0.999$) and to determine the pitch angle of the helical jet ($p=5.5^\circ$). The derived parameters can give rise to the conditions required to observe high speeds (right to 37$c$) for individual jet components.
description: Initial arXiv submission has been published in two papers. This is the first one. The second paper is arXiv:2110.10222. 8 pages, 4 figures
Petition Growth and Success Rates on the UK No. 10 Downing Street Website
Creators: name: Hale, Scott A.
name: Margetts, Helen
name: Yasseri, Taha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Now that so much of collective action takes place online, web-generated data can further understanding of the mechanics of Internet-based mobilisation. This trace data offers social science researchers the potential for new forms of analysis, using real-time transactional data based on entire populations, rather than sample-based surveys of what people think they did or might do. This paper uses a `big data' approach to track the growth of over 8,000 petitions to the UK Government on the No. 10 Downing Street website for two years, analysing the rate of growth per day and testing the hypothesis that the distribution of daily change will be leptokurtic (rather than normal) as previous research on agenda setting would suggest. This hypothesis is confirmed, suggesting that Internet-based mobilisation is characterized by tipping points (or punctuated equilibria) and explaining some of the volatility in online collective action. We find also that most successful petitions grow quickly and that the number of signatures a petition receives on its first day is a significant factor in explaining the overall number of signatures a petition receives during its lifetime. These findings have implications for the strategies of those initiating petitions and the design of web sites with the aim of maximising citizen engagement with policy issues.
description: To appear in proceeding of WebSci'13, May 1-5, 2013, Paris, France
MPEC 2023-Q09 : 2022 UK7
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Temporal Analysis of Activity Patterns of Editors in Collaborative Mapping Project of OpenStreetMap
Creators: name: Yasseri, Taha
name: Quattrone, Giovanni
name: Mashhadi, Afra
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In the recent years Wikis have become an attractive platform for social studies of the human behaviour. Containing millions records of edits across the globe, collaborative systems such as Wikipedia have allowed researchers to gain a better understanding of editors participation and their activity patterns. However, contributions made to Geo-wikis_wiki-based collaborative mapping projects_ differ from systems such as Wikipedia in a fundamental way due to spatial dimension of the content that limits the contributors to a set of those who posses local knowledge about a specific area and therefore cross-platform studies and comparisons are required to build a comprehensive image of online open collaboration phenomena. In this work, we study the temporal behavioural pattern of OpenStreetMap editors, a successful example of geo-wiki, for two European capital cities. We categorise different type of temporal patterns and report on the historical trend within a period of 7 years of the project age. We also draw a comparison with the previously observed editing activity patterns of Wikipedia.
description: Submitted
Assessing Conflict Resolution Practice In Real Estate Construction: The Case Of Zenebe Firew Real Estate
Creators: name: Shibru, Eleni
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The purpose of this study is describes the causes of conflict between residential real estate companies and their customers as well as the conflict resolution practice they apply by taking the case of Zenebe Firew Real Estate Company and its customers. Primary and secondary data for the study were obtained through in – depth interview and questionnaire with the employees and customers of the company respectively as well as through the analysis of documents of the company that are related to the study. As a result, the study revealed that the major causes of the conflicts are failure in timely delivery of houses; cost escalation; quality and infrastructure problem. In addition, the company used accommodation, compromising and collaboration styles to resolve the conflicts they faced. The assessment was done by taking customer satisfaction as a parameter in the time, cost and quality point of view. Therefore, the study recommends the company to review the main causes of the conflicts and tackle them for the future in order to gain customer satisfaction with the company work.
Reasoning about identifier spaces: How to make Chord correct
Creators: name: Zave, Pamela
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The Chord distributed hash table (DHT) is well-known and often used to implement peer-to-peer systems. Chord peers find other peers, and access their data, through a ring-shaped pointer structure in a large identifier space. Despite claims of proven correctness, i.e., eventual reachability, previous work has shown that the Chord ring-maintenance protocol is not correct under its original operating assumptions. Previous work has not, however, discovered whether Chord could be made correct under the same assumptions. The contribution of this paper is to provide the first specification of correct operations and initialization for Chord, an inductive invariant that is necessary and sufficient to support a proof of correctness, and two independent proofs of correctness. One proof is informal and intuitive, and applies to networks of any size. The other proof is based on a formal model in Alloy, and uses fully automated analysis to prove the assertions for networks of bounded size. The two proofs complement each other in several important ways.
description: 14 pages including references; 6 figures. arXiv admin note: text overlap with arXiv:1502.06461