cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Estudio de factibilidad de la creación de un apiario en el municipio de Arjona Bolívar
Creators: name: González Salgado, Andrea Colombia
name: Echenique Vásquez, Rodolfo Enrique
Publisher: name: Universidad de Cartagena
Year: 2017
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, 2017
description: El presente estudio tiene por objeto realizar un estudio de factibilidad para la creación de un apiario en el municipio de Arjona - Bolívar, a través de un estudio de mercado y del análisis técnico, organizacional, legal, financiero y ambiental que sirva de herramienta para la toma de decisiones en materia de inversión.
Rapid rise and decay in petition signing
Creators: name: Yasseri, Taha
name: Hale, Scott A.
name: Margetts, Helen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
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: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Contemporary collective action, much of which involves social media and other Internet-based platforms, leaves a digital imprint which may be harvested to better understand the dynamics of mobilization. Petition signing is an example of collective action which has gained in popularity with rising use of social media and provides such data for the whole population of petition signatories for a given platform. This paper tracks the growth curves of all 20,000 petitions to the UK government petitions website (http://epetitions.direct.gov.uk) and 1,800 petitions to the US White House site (https://petitions.whitehouse.gov), analyzing the rate of growth and outreach mechanism. Previous research has suggested the importance of the first day to the ultimate success of a petition, but has not examined early growth within that day, made possible here through hourly resolution in the data. The analysis shows that the vast majority of petitions do not achieve any measure of success; over 99 percent fail to get the 10,000 signatures required for an official response and only 0.1 percent attain the 100,000 required for a parliamentary debate (0.7 percent in the US). We analyze the data through a multiplicative process model framework to explain the heterogeneous growth of signatures at the population level. We define and measure an average outreach factor for petitions and show that it decays very fast (reducing to 0.1 pervent after 10 hours in the UK and 30 hours in the US). After a day or two, a petition's fate is virtually set. The findings challenge conventional analyses of collective action from economics and political science, where the production function has been assumed to follow an S-shaped curve.
description: For the final version see https://link.springer.com/content/pdf/10.1140/epjds/s13688-017-0116-6.pdf
The distorted mirror of Wikipedia: a quantitative analysis of Wikipedia coverage of academics
Creators: name: Samoilenko, Anna
name: Yasseri, Taha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computers and Society (cs.CY)
subject: Digital Libraries (cs.DL)
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: Activity of modern scholarship creates online footprints galore. Along with traditional metrics of research quality, such as citation counts, online images of researchers and institutions increasingly matter in evaluating academic impact, decisions about grant allocation, and promotion. We examined 400 biographical Wikipedia articles on academics from four scientific fields to test if being featured in the world's largest online encyclopedia is correlated with higher academic notability (assessed through citation counts). We found no statistically significant correlation between Wikipedia articles metrics (length, number of edits, number of incoming links from other articles, etc.) and academic notability of the mentioned researchers. We also did not find any evidence that the scientists with better WP representation are necessarily more prominent in their fields. In addition, we inspected the Wikipedia coverage of notable scientists sampled from Thomson Reuters list of "highly cited researchers". In each of the examined fields, Wikipedia failed in covering notable scholars properly. Both findings imply that Wikipedia might be producing an inaccurate image of academics on the front end of science. By shedding light on how public perception of academic progress is formed, this study alerts that a subjective element might have been introduced into the hitherto structured system of academic evaluation.
description: To appear in EPJ Data Science. To have the Additional Files and Datasets e-mail the corresponding author
Diagnose von Grundwissen und Grundkönnen durch ein adaptives Testverfahren
Creators: name: Feldt-Caesar, Nora
name: Bruder, Regina
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Nach wie vor stellt mathematisches Grundwissen und Grundkönnen ein zentrales Thema der fachdidaktischen Diskussion dar. Dabei geht es nicht nur um die Konzeptualisierung und Festlegung konkreter Inhalte, sondern auch um Möglichkeiten der Diagnose.
Valley Phase and Voltage Control of Coherent Manipulation in Si Quantum Dots
Creators: name: Zimmerman, Neil
name: Huang, Peihao
name: Culcer, Dimitrie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: With any roughness at the interface of an indirect-bandgap semiconducting dot, the phase of the valley-orbit coupling can take on a random value. This random value, in double quantum dots, causes a large change in the exchange splitting. We demonstrate a simple analytical method to calculate the phase, and thus the exchange splitting and singlet-triplet qubit frequency, for an arbitrary interface. We then show that, with lateral control of the position of a quantum dot using a gate voltage, the valley-orbit phase can be controlled over a wide range, so that variations in the exchange splitting can be controlled for individual devices. Finally, we suggest experiments to measure the valley phase and the concomitant gate voltage control.
description: 9 pages, 5 figures
Evaluación de alternativas para un sistema sostenible de abastecimiento de agua potable para los corregimientos de San Joaquín, Monroy y San Francisco en el Departamento de Bolívar
Creators: name: Granados Mejia, David Alejandro
name: Peña Garavito, Juan David
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Abastecimiento de agua
Agua potable

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería Civil, 2016
description: El objetivo del estudio fue la evaluación de alternativas para un sistema de abastecimiento de agua potable de los corregimientos de Monroy, San Francisco y San Joaquín en el departamento de Bolívar Colombia. La evaluación se realizó teniendo en cuenta diferentes aspectos, tales como la fuente, el lugar de captación, conducción, almacenamiento y tratamiento de agua por medio de sistemas no convencionales, por último se analizó y diseño la red distribución pertinente para los tres corregimientos en los que se basó este estudio.
EmMa – ErzieherInnen machen Mathe
Creators: name: Fricke, Sebastian
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Die Ergebnisse zahlreicher Untersuchungen heben die Bedeutung früher mathematischer Bildungsprozesse eindrucksvoll hervor. So konnte gezeigt werden, dass Kinder ihre Schullaufbahn teilweise mit beträchtlichen mathematischen Erfahrungen beginnen (vgl. Fuson 1988; Hasemann 2003) diese allerdings sehr heterogen ausgeprägt sind (vgl. Krajewski 2003; Grüßing & Peter-Koop 2008). Es wurde ebenfalls festgestellt, dass das Vorwissen der Kinder bereits ein Jahr vor der Einschulung einen deutlicheren Einfluss auf die späteren Mathematikleistungen hat als z.B. Intelligenz (vgl. Dornheim 2008). Förderungen die von den Erziehenden der Kinder durchgeführt werden, dabei methodisch alltagsintegriert und inhaltlich an den Fähigkeiten der Kinder anknüpfen, wirken sich positiv und nachhaltig auf die mathematischen Kompetenzen der Kinder aus (vgl. Grüßing & Peter-Koop 2008; Gasteiger 2010). Ausgehend von diesen Befunden scheint es, auch um negative Erfahrungen in Bezug auf späteres Mathematiklernen zu vermeiden, notwendig und sinnvoll Kinder vorschulisch mathematisch anzuregen. Diese Aufgabe verlangt von den beteiligten Erziehenden neben einer kontinuierlichen Beobachtung und Dokumentation auch ein hohes Maß an Fachkompetenz und pädagogisch-didaktischer Handlungskompetenz (vgl. Gasteiger im Druck). Um Erziehende in Kindertageseinrichtungen, die im Rahmen ihrer Ausbildung kaum mathematikdidaktische Inhalte erarbeiten, bei dieser Aufgabe zu unterstützen, bedarf es Maßnahmen der Professionalisierung.
Lightweight compression with encryption based on Asymmetric Numeral Systems
Creators: name: Duda, Jarek
name: Niemiec, Marcin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Data compression combined with effective encryption is a common requirement of data storage and transmission. Low cost of these operations is often a high priority in order to increase transmission speed and reduce power usage. This requirement is crucial for battery-powered devices with limited resources, such as autonomous remote sensors or implants. Well-known and popular encryption techniques are frequently too expensive. This problem is on the increase as machine-to-machine communication and the Internet of Things are becoming a reality. Therefore, there is growing demand for finding trade-offs between security, cost and performance in lightweight cryptography. This article discusses Asymmetric Numeral Systems -- an innovative approach to entropy coding which can be used for compression with encryption. It provides compression ratio comparable with arithmetic coding at similar speed as Huffman coding, hence, this coding is starting to replace them in new compressors. Additionally, by perturbing its coding tables, the Asymmetric Numeral System makes it possible to simultaneously encrypt the encoded message at nearly no additional cost. The article introduces this approach and analyzes its security level. The basic application is reducing the number of rounds of some cipher used on ANS-compressed data, or completely removing additional encryption layer if reaching a satisfactory protection level.
description: 10 pages, 6 figures
Can electoral popularity be predicted using socially generated big data?
Creators: name: Yasseri, Taha
name: Bright, Jonathan
Publisher: name: arXiv
Year: 2013
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: Today, our more-than-ever digital lives leave significant footprints in cyberspace. Large scale collections of these socially generated footprints, often known as big data, could help us to re-investigate different aspects of our social collective behaviour in a quantitative framework. In this contribution we discuss one such possibility: the monitoring and predicting of popularity dynamics of candidates and parties through the analysis of socially generated data on the web during electoral campaigns. Such data offer considerable possibility for improving our awareness of popularity dynamics. However they also suffer from significant drawbacks in terms of representativeness and generalisability. In this paper we discuss potential ways around such problems, suggesting the nature of different political systems and contexts might lend differing levels of predictive power to certain types of data source. We offer an initial exploratory test of these ideas, focussing on two data streams, Wikipedia page views and Google search queries. On the basis of this data, we present popularity dynamics from real case examples of recent elections in three different countries.
description: To appear in Information Technology
What Can We Learn From Analogue Experiments?
Creators: name: Thebault, Karim P. Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In 1981 Unruh proposed that fluid mechanical experiments could be used to probe key aspects of the quantum phenomenology of black holes. In particular, he claimed that an analogue to Hawking radiation could be created within a fluid mechanical `dumb hole', with the event horizon replaced by a sonic horizon. Since then an entire sub-field of `analogue gravity' has been created. In 2016 Steinhauer reported the experimental observation of quantum Hawking radiation and its entanglement in a Bose-Einstein condensate analogue black hole. What can we learn from such analogue experiments? In particular, in what sense can they provide evidence of novel phenomena such as black hole Hawking radiation?
description: There was an unfortunate typo in the previous version of this preprint: "conclusive" should have been "substantial"
Helping Crisis Responders Find the Informative Needle in the Tweet Haystack
Creators: name: Derczynski, Leon
name: Meesters, Kenny
name: Bontcheva, Kalina
name: Maynard, Diana
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Crisis responders are increasingly using social media, data and other digital sources of information to build a situational understanding of a crisis situation in order to design an effective response. However with the increased availability of such data, the challenge of identifying relevant information from it also increases. This paper presents a successful automatic approach to handling this problem. Messages are filtered for informativeness based on a definition of the concept drawn from prior research and crisis response experts. Informative messages are tagged for actionable data -- for example, people in need, threats to rescue efforts, changes in environment, and so on. In all, eight categories of actionability are identified. The two components -- informativeness and actionability classification -- are packaged together as an openly-available tool called Emina (Emergent Informativeness and Actionability).
Particles from preformed polymers as carriers for drug delivery
Creators: name: Miladi, K.
name: Ibraheem, D.
name: Iqbal, M.
name: Sfar, S.
name: Fessi, H.
name: Elaissari, A.
Publisher: name: Technische Universität Dortmund
Year: 2014
Subjects: subject: drug delivery
subject: particles
subject: polymer
subject: encapsulation
subject: carriers
subject: operating conditions
subject: 610

description: Biodegradable and biocompatible polymers are widely used for the encapsulation of drug molecules. Various particulate carriers with different sizes and characteristics have been prepared by miscellaneous techniques. In this review, we reported the commonly used preformed polymer based techniques for the preparation of micro and nano-structured materials intended for drug encapsulation. A description of polymer-solvent interaction was provided. The most widely used polymers were reported and described and their related research studies were mentioned. Moreover, principles of each technique and its crucial operating conditions were described and discussed. Recent applications of all the reported techniques in drug delivery were also reviewed.
description: EXCLI Journal ; Vol. 13, 2014
Diagnostische Prozesse und Ressourcen von Mathematiklehrpersonen
Creators: name: Philipp, Kathleen
name: Leuders, Timo
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Im Unterricht gibt es zahlreiche Situationen, in denen diagnostische Tätigkeiten von Lehrkräften notwendig sind und verschiedene Kompetenzen erfordern. Schrader (2006) definiert diagnostische Kompetenz als die „Fähigkeit eines Urteilers, Personen zutreffend zu beurteilen“ (ebd., S. 95). Im Mathematikunterricht bezieht sich Diagnose neben der Beurteilung von Personenmerkmalen auch auf die Einschätzung von Lern- und Aufgabenanforderungen (z.B. Brunner et al., 2011). Während die Bedeutung diagnostischer Kompetenz für den Mathematikunterricht als hoch eingestuft wird (Helmke et al., 2004; Anders et al., 2010), wird Lehrkräften eine unzureichende Ausbildung diagnostischer Kompetenz bescheinigt (Krauss & Brunner, 2011). Als Indikator diagnostischer Kompetenz dient dabei häufig die Genauigkeit eines Urteils (Veridikalität). Allerdings bestehen noch Wissenslücken im Hinblick auf die Struktur und die Genese diagnostischer Urteile, ein empirisch fundiertes und überprüftes Modell diagnostischer Kompetenz fehlt bislang (Schrader, 2011; Anders et al., 2010).
Noncrossing partitions for periodic braids
Creators: name: Lee, Eon-Kyung
name: Lee, Sang-Jin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary 20F36, Secondary 37F20

description: An element in Artin's braid group $B_n$ is called periodic if it has a power which lies in the center of $B_n$. The conjugacy problem for periodic braids can be reduced to the following: given a divisor $1\le d
description: published version in Journal of Combinatorial Theory, Series A
Modeling Social Dynamics in a Collaborative Environment
Creators: name: Iñiguez, Gerardo
name: Török, János
name: Yasseri, Taha
name: Kaski, Kimmo
name: Kertész, János
Publisher: name: arXiv
Year: 2014
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: Wikipedia is a prime example of today's value production in a collaborative environment. Using this example, we model the emergence, persistence and resolution of severe conflicts during collaboration by coupling opinion formation with article editing in a bounded confidence dynamics. The complex social behavior involved in editing articles is implemented as a minimal model with two basic elements; (i) individuals interact directly to share information and convince each other, and (ii) they edit a common medium to establish their own opinions. Opinions of the editors and that represented by the article are characterised by a scalar variable. When the pool of editors is fixed, three regimes can be distinguished: (a) a stable mainstream article opinion is continuously contested by editors with extremist views and there is slow convergence towards consensus, (b) the article oscillates between editors with extremist views, reaching consensus relatively fast at one of the extremes, and (c) the extremist editors are converted very fast to the mainstream opinion and the article has an erratic evolution. When editors are renewed with a certain rate, a dynamical transition occurs between different kinds of edit wars, which qualitatively reflect the dynamics of conflicts as observed in real Wikipedia data.
description: Revised version, to appear in EPJ Data Science; 19 pages 9 figures
Conflictos familiares y su influencia en el proceso de aprendizaje de niños y niñas de preescolar del Instituto Miguel de Cervantes de la ciudad de Cartagena del año 2014
Creators: name: Alvear Pérez, Nazly Esther
name: Castillo Alvarez, Natalia
name: Pardo Babilonia, Karen Ines
Publisher: name: Universidad de Cartagena
Year: 2014
Subjects: Violencia escolar
Aprendizaje
Violencia conyugal
Educación preescolar

description: Tesis (Licenciado en Pedagogía Infantil) -- Universidad de Cartagena. Facultad de ciencias sociales y educación. Programa de licenciatura en pedagogía infantil, 2014
description: La violencia intrafamiliar es un problema de salud pública, presente en la población infantil, que repercute en muchos factores; uno de ellos es su rendimiento académico. El objetivo de esta investigación es obtener información del ambiente socio-familiar, de la familia con miembros migrantes a las cuales pertenecen conocer la magnitud del problema en la institución educativa, así mismo queda como referente para que posteriores investigaciones los tengan en cuenta y realicen actividades mediante un trabajo multisectorial como es Salud y Educación para disminuir y prevenir la violencia intrafamiliar y contribuir a un óptimo rendimiento académico en los adolescentes. Fue una investigación cuantitativa, analítica-correlacional, la cual nos permitió conocer la problemática y a su vez diseñar estrategias que conlleven a posibles soluciones. La población fue de 86 niños, la muestra de 60. Se utilizó el cuestionario y promedio ponderado de notas, se trabajó con gráficas. Los resultados fueron: La violencia intrafamiliar influye en el bajo rendimiento académico de los niños y existe una relación significativa entre violencia intrafamiliar y rendimiento académico. En este contexto la investigación se justifica tanta en el ámbito teórico como práctico. Desde el punto de vista teórico es importante, pues se va a contribuir con un enfoque metodológico que permita incrementar y profundizar el conocimiento respectivo de algunos patrones de conductas familiares y sociales que tipifican a las familias de los alumnos, que presentan rendimiento académico inadecuado, principalmente en la primera etapa escolar. En el ámbito práctico, la información generada, contribuirá a mejorar las estrategias de prevención e intervención propuestas, para modificar tales patrones familiares y sociales que influyen en el rendimiento académico inadecuado, contribuyendo a la práctica profesional. Los niños y niñas, que permita descubrir diversos grados y tipos de funcionamiento familiar que sean factores de riesgo y que están influenciando en su rendimiento académico. Determinar la influencia de la violencia intrafamiliar en el rendimiento académico en los adolescentes. La investigación fue importante porque permitió identificar las deferentes causas que pueden llegar a generar conflictos en las familias basándonos en los resultados.
Opportunities and Challenges of Implementing Electronics Payment Projects in Bank of Abyssinia
Creators: name: Kebede, Nardos
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: This project work aims to examine implementation of electronic payment project in Bank of Abyssinia with respect to the available opportunities which drive implementation process and challenges which can influence the bank from adopting technological oriented payment system. The study applied exploratory research design and used both questionnaires and semi structured interview as instrument to collect primary data, while secondary data were reviewed from various publications. Purposive sampling was used to gather the data through questionnaire for E-banking and IS support department team members sample size of thirty and Semi structure interview was employed for the director of E-Banking department. A mixed research approach was used to answer the research questions. Quantitative data were analyzed with the use of SPSS version 20 software using statistical tools of frequency, percentage, mean score and standard deviation. The results investigated from the selected respondents and review of secondary data demonstrates that, the opportunities that drive implementation of electronic payment projects are: the market is endowed with huge potential of untapped and unbanked population, development in mobile phone ownership has an immense opportunity to adopt electronic payment technologies, it is a way to minimize cost for the bank and it reduces risks of traditional payment system. The study result also identified insufficient government support, low level of ICT literacy rate, inefficiency of employees of the bank, inadequate telecommunication infrastructure, frequent power interruption and minimum emphasize given to electronic payment system by the bank as challenges of implementation process. On these basis, suggestions are offer to Bank of Abyssinia to empower employees with better technical skill and other necessary skills and developing and improving technological payment methods shall be given the priority.
An occupation-based lifestyle lecture intervention as part of inpatient addiction recovery treatment: Exploring occupational performance, balance and personal recovery
Creators: name: Ryan, Deirdre
name: Naughton, Marie
name: de Faoite, Meabh
name: Dowd, Tara
name: Morrissey, Ann-Marie
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: Introduction: Substance use disorders (SUDs) and addictive behaviours are growing problems which negatively impact health and wellbeing. Occupational therapy can support recovery by facilitating engagement in everyday activities that promote health. To date, the inclusion of occupational therapy in addiction recovery is limited and the evidence base for occupation-focused interventions is lacking. This study explores the impact of an occupational therapy-led intervention on self-reported occupational performance and occupational balance issues for people living with SUDs within an inpatient addiction service.Methodology: A quantitative pre and post-test study was implemented. The Canadian Personal Recovery Outcome Measure (C-PROM) was the sole outcome measure. The C-PROM is a self-report measure which aims to measure personal views of recovery based on rating activity engagement. The cohort of participants were recruited from referrals into 2 inpatient addiction recovery treatment programmes using purposive sampling. Descriptive statistics were run, and a Wilcoxon Signed Rank Test was used to analyse pre and post-test scoring.Results: Sixteen participants (9 male and 7 female) completed the intervention and outcome measure. The majority of participants (31.3%, n=5) were between 45 and 54 years old. 25% of the sample (n=4) were in the 35 to 44 age bracket while 18.8% (n=3) were aged 55 to 64. The majority of participants (68.8%, n=11) reported substance misuse as their main healthcare concern. The mean score on the C-PROM was significantly higher after participants received the intervention when compared with baseline scoring.Conclusion: Following engagement with an occupational therapist-led intervention participants reported increased engagement in activities and occupational performance. Participants also reported improved occupational balance and increased awareness of personal recovery needs. Further research is required to explore the effectiveness of this intervention in larger samples and to explore the transferability and sustainability of skills post discharge.
Modelling Lobbying Behaviour and Interdisciplinarity Dynamics in Academia
Creators: name: Mazzoleni, Stefano
name: Russo, Lucia
name: Giannino, Francesco
name: Toraldo, Gerardo
name: Siettos, Constantinos
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Disciplinary diversity is being recognized today as the key to establish a vibrant academic environment with bigger potential for breakthroughs in research and technology. However, the interaction of several factors including policies, and behavioral attitudes put significant barriers on advancing interdisciplinarity. A "cognitive rigidity" may rise due to reactive academic lobbying favouring inbreeding. Here, we address, analyse and discuss a mathematical model of lobbying and interdisciplinarity dynamics in Academia. The model consists of four coupled non-linear Ordinary Differential Equations simulating the interaction between three types of academic individuals and a state reflecting the rate of knowledge advancement which is related to the level of disciplinary diversity. Our model predicts a rich nonlinear behaviour including multiplicity of states and sustained periodic oscillations resembling the everlasting struggle between the "new" and the "old". The effect of a control policy that inhibits lobbying is also studied. By appropriate adjustment of the model parameters we approximated the jump/phase transitions in breakthroughs in mathematical and molecular biological sciences resulted by the increased flow of Russian scientists in the USA after the dissolution of the Soviet Union starting in 1989, the launch of the Human Genome Project in 1992 and the Internet diffusion starting in 2000.
Mapping the UK Webspace: Fifteen Years of British Universities on the Web
Creators: name: Hale, Scott A.
name: Yasseri, Taha
name: Cowls, Josh
name: Meyer, Eric T.
name: Schroeder, Ralph
name: Margetts, Helen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Digital Libraries (cs.DL)
subject: Computers and Society (cs.CY)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This paper maps the national UK web presence on the basis of an analysis of the .uk domain from 1996 to 2010. It reviews previous attempts to use web archives to understand national web domains and describes the dataset. Next, it presents an analysis of the .uk domain, including the overall number of links in the archive and changes in the link density of different second-level domains over time. We then explore changes over time within a particular second-level domain, the academic subdomain .ac.uk, and compare linking practices with variables, including institutional affiliation, league table ranking, and geographic location. We do not detect institutional affiliation affecting linking practices and find only partial evidence of league table ranking affecting network centrality, but find a clear inverse relationship between the density of links and the geographical distance between universities. This echoes prior findings regarding offline academic activity, which allows us to argue that real-world factors like geography continue to shape academic relationships even in the Internet age. We conclude with directions for future uses of web archive resources in this emerging area of research.
description: To appear in the proceeding of WebSci 2014
Evaluación de la responsabilidad social empresarial del Centro Pastoral el Salvador en el barrio Nelson Mandela de la ciudad de Cartagena
Creators: name: Montesino Rodelo, Milena
name: Ramos Arrieta, Milena Patricia
Publisher: name: Universidad de Cartagena
Year: 2013
Subjects: Empresa Social
Ética de los negocios
Responsabilidad social de los negocios

description: Tesis(Administrador de Empresas).-Universidad de Cartagena. Facultad de Ciencias Económicas.Programa de Administración de Empresas,2013
description: La Responsabilidad Social Empresarial (RSE), es una temática que cobra cada vez más importancia en la sociedad, puesto que la aplicación de ésta debe generar un impacto positivo en el desarrollo social y económico de la misma. El tema de la RSE es cada día más valorado debido a las condiciones actuales de la sociedad y las exigencias del mercado mismo, estos son algunos de los motivos por los cuales más empresas ponen en práctica actividades de Responsabilidad Social Empresarial. En Colombia desde los años 70 la Responsabilidad Social Empresarial ha generado importantes desarrollos en el ámbito económico y social del país, sin embargo los altos grados de pobreza y de vulnerabilidad hacen que Colombia sea un país donde cada vez más, se requiera entidades que centren esfuerzos en la RSE Dada la problemática social y económica del país y de Cartagena específicamente, la entidad Centro Pastoral El Salvador ha venido practicando desde hace veinte años, la Responsabilidad Social Empresarial a través de programas tales como: Programa de Recuperación Nutricional, Programa de capacitación no formal, Programa de Adolescentes Gestantes y Lactantes, los cuales se llevan a cabo en barrios como Nelson Mandela. Por todo lo anteriormente mencionado resulta relevante realizar la evaluación de la Responsabilidad Social Empresarial (RSE) del Centro Pastoral el Salvador en el barrio Nelson Mandela
Investigating Political Participation and Social Information Using Big Data and a Natural Experiment
Creators: name: Hale, Scott A.
name: John, Peter
name: Margetts, Helen
name: Yasseri, Taha
Publisher: name: arXiv
Year: 2014
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: Social information is particularly prominent in digital settings where the design of platforms can more easily give real-time information about the behaviour of peers and reference groups and thereby stimulate political activity. Changes to these platforms can generate natural experiments allowing an assessment of the impact of changes in social information and design on participation. This paper investigates the impact of the introduction of trending information on the homepage of the UK government petitions platform. Using interrupted time series and a regression discontinuity design, we find that the introduction of the trending feature had no statistically significant effect on the overall number of signatures per day, but that the distribution of signatures across petitions changes: the most popular petitions gain even more signatures at the expense of those with less signatories. We find significant differences between petitions trending at different ranks, even after controlling for each petition's individual growth prior to trending. The findings suggest a non-negligible group of individuals visit the homepage of the site looking for petitions to sign and therefore see the list of trending petitions, and a significant proportion of this group responds to the social information that it provides. These findings contribute to our understanding of how social information, and the form in which it is presented, affects individual political behaviour in digital settings.
description: Prepared for delivery at the 2014 Annual Meeting of the American Political Science Association, August 28-31, 2014
Structural limitations of learning in a crowd: communication vulnerability and information diffusion in MOOCs
Creators: name: Gillani, Nabeel
name: Yasseri, Taha
name: Eynon, Rebecca
name: Hjorth, Isis
Publisher: name: arXiv
Year: 2014
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: Massive Open Online Courses (MOOCs) bring together a global crowd of thousands of learners for several weeks or months. In theory, the openness and scale of MOOCs can promote iterative dialogue that facilitates group cognition and knowledge construction. Using data from two successive instances of a popular business strategy MOOC, we filter observed communication patterns to arrive at the "significant" interaction networks between learners and use complex network analysis to explore the vulnerability and information diffusion potential of the discussion forums. We find that different discussion topics and pedagogical practices promote varying levels of 1) "significant" peer-to-peer engagement, 2) participant inclusiveness in dialogue, and ultimately, 3) modularity, which impacts information diffusion to prevent a truly "global" exchange of knowledge and learning. These results indicate the structural limitations of large-scale crowd-based learning and highlight the different ways that learners in MOOCs leverage, and learn within, social contexts. We conclude by exploring how these insights may inspire new developments in online education.
description: Pre-print version. Published version available at http://dx.doi.org/10.1038/srep06447
Los ejércitos de Evelio Rosero Diago: Escritura agónica de la victimización del ser
Creators: name: Mouthon Puentes, Marlon
name: Vásquez Londoño, Roxana
Publisher: name: Universidad de Cartagena
Year: 2009
Subjects: Novela Colombiana
Tesis - Lingüística y literatura

description: Tesis (Profesional en Linguística y Literatura) -- Universidad de Cartagena. Facultad de ciencias humanas. Programa de linguística y literatura, 2009 Incluye referencias bibliográficas (h. 110-113)
description: El presente trabajo tiene como objetivo, analizar como se lleva el conflicto armado en Colombia, como estremeció la violencia política al país en el siglo XX, como se convirtió en el preludio en otras formas de violencia, y como se instalan y se propagan por todo el territorio nacional.
Impact of stirring time and the corresponding growth mechanism in the solvothermal synthesis of WO3 nanostructures
Creators: name: Jin, Changhyun
name: Lim, Jong-Chan
name: Kim, Min Young
name: Choi, Myung Sik
name: Kim, Sang-Il
name: Baek, Seung-Hyub
name: Kim, Sun-Jae
name: Lee, Seung Yong
name: Kim, Hyun-Sik
name: Lee, Kyu Hyoung
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology

description: WO3 nanostructures with different morphologies and dimensions were fabricated via solvothermal synthesis by adjusting the stirring time of the precursor solution. Ethanol-based solutions of the WCl6 precursor with various colors (dark green, yellow, white, blue, and blue-black) were prepared, and this triggered a significant change in the growth behavior during the evolution of WO3 nanostructures. Controlling the initial state of the precursors in solution enabled sequential nucleation and growth which resulted in the production of zero-to-three-dimensional nanostructures including nanoparticles, a mixture of nanosheets and nanoparticles, jointed-nanosheets, and three-dimensionally clustered jointed-nanosheets. The crystallographic characteristics (preferred orientation along the (002) plane) and the concentration of surface oxygen vacancies were also controllable, suggesting the formation of nanostructures with tuneable surface reactivity. Differing NO2 sensing performances were observed because of the variation in configurations of the WO3 nanostructures.
Classifying exact categories via Wakamatsu tilting
Creators: name: Enomoto, Haruhisa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: Using the Morita-type embedding, we show that any exact category with enough projectives has a realization as a (pre)resolving subcategory of a module category. When the exact category has enough injectives, the image of the embedding can be described in terms of Wakamatsu tilting (=semi-dualizing) subcategories. If moreover the exact category has higher kernels, then its image coincides with the category naturally associated with a cotilting subcategory up to summands. We apply these results to the representation theory of artin algebras. In particular, we show that the ideal quotient of a module category by a functorially finite subcategory closed under submodules is a torsionfree class of some module category.
description: 28 pages. Final version
Wikipedia traffic data and electoral prediction: towards theoretically informed models
Creators: name: Yasseri, Taha
name: Bright, Jonathan
Publisher: name: arXiv
Year: 2015
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: This aim of this article is to explore the potential use of Wikipedia page view data for predicting electoral results. Responding to previous critiques of work using socially generated data to predict elections, which have argued that these predictions take place without any understanding of the mechanism which enables them, we first develop a theoretical model which highlights why people might seek information online at election time, and how this activity might relate to overall electoral outcomes, focussing especially on how different types of parties such as new and established parties might generate different information seeking patterns. We test this model on a novel dataset drawn from a variety of countries in the 2009 and 2014 European Parliament elections. We show that while Wikipedia offers little insight into absolute vote outcomes, it offers a good information about changes in both overall turnout at elections and in vote share for particular parties. These results are used to enhance existing theories about the drivers of aggregate patterns in online information seeking.
description: submitted to EPJ Data Science. Additional File 1 available at https://drive.google.com/open?id=0BxaGC-YCTO6SWkJhRXlrMVRYVlE
Rehabilitación del sistema de acueducto de las Localidades de Hato Viejo, Arroyo Hondo y Pilón en los Municipios de Calamar y Arroyo Hondo
Creators: name: Jaimes Rada, Fernando Ivan
name: Rincon Linaje, Angel Alberto
name: Roca Bustamante, Juan (Director)
Publisher: name: Universidad de Cartagena
Year: 2002
Subjects: Acueducto - Diseño y construcción
Recuperacion - Redes de acueducto - Hato viejo, arroyo hondo, pilon
Acueducto - Bolívar

description: Tesis (Ingeniero Civil).--Universidad de Cartagena. Facultad de Ciencias Económicas E Ingeniería. Programa de Ingeniería Civil, 2002.
description: El presente estudio tiene por objeto actualizar el diseño y optimizar el sistema de acueducto existente en las localidades de Hato Viejo, Arroyo Hondo y Pilón en los municipios de Calamar y Arroyo Hondo y ajustarlo al RAS-2000
title: In vivo imaging of presynaptic pathology in a mouse model of Alzheimer’s disease
Creators: name: Dorostkar, Mario
name: Peters, Finn
name: Herms, Jochen
Publisher: name: German Medical Science GMS Publishing House
Year: 2015
Subjects: subject: 610 Medical sciences; Medicine

description: Introduction & objectives: Loss of synaptic function is the immediate cause of cognitive decline and memory dysfunction in Alzheimer’s disease. In previous studies we found substantial structural and functional alterations at excitatory postsynapses in the immediate vicinity of fibrillar[for full text, please go to the a.m. URL]
description: 60th Annual Meeting of the German Society for Neuropathology and Neuroanatomy (DGNN)
P-values: misunderstood and misused
Creators: name: Vidgen, Bertie
name: Yasseri, Taha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: Computers and Society (cs.CY)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: P-values are widely used in both the social and natural sciences to quantify the statistical significance of observed results. The recent surge of big data research has made the p-value an even more popular tool to test the significance of a study. However, substantial literature has been produced critiquing how p-values are used and understood. In this paper we review this recent critical literature, much of which is routed in the life sciences, and consider its implications for social scientific research. We provide a coherent picture of what the main criticisms are, and draw together and disambiguate common themes. In particular, we explain how the False Discovery Rate is calculated, and how this differs from a p-value. We also make explicit the Bayesian nature of many recent criticisms, a dimension that is often underplayed or ignored. We conclude by identifying practical steps to help remediate some of the concerns identified. We recommend that (i) far lower significance levels are used, such as $0.01$ or $0.001$, and (ii) p-values are interpreted contextually, and situated within both the findings of the individual study and the broader field of inquiry (through, for example, meta-analyses).
description: Published in Frontiers in Physics: Vidgen B and Yasseri T (2016) P-Values: Misunderstood and Misused. Front. Phys. 4:6
A Data-Driven McMillan Degree Lower Bound
Creators: name: Hokanson, Jeffrey M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 15B52, 60B20, 62B10, 70J10, 93E12

description: Given measurements of a linear time-invariant system, the McMillan degree is the dimension of the smallest such system that reproduces these observed dynamics. Using impulse response measurements where the system has been started in some (unknown) state and then allowed to evolve freely, a classical result by Ho and Kalman reveals the McMillan degree as the rank of a Hankel matrix built from these measurements. However, if measurements are contaminated by noise, this Hankel matrix will almost surely be full rank. Hence practitioners often estimate the rank of this matrix---and thus the McMillan degree---by manually setting a threshold between the large singular values that correspond to the non-zero singular values of the noise-free Hankel matrix and the small singular values that are pertubations of the zero singular values. Here we introduce a probabilistic upper bound on the perturbation of the singular values of this Hankel matrix when measurements are corrupted by additive Gaussian noise, and hence provide guidance on setting the threshold to obtain a lower bound on the McMillan degree. This result is powered by a new, probabilistic bound on the 2-norm of a random Hankel matrix with normally distributed entries. Unlike existing results for random Hankel matrices, this bound features no unknown constants and, moreover, is within a small factor of the empirically observed bound when entries are independent and identically distributed. This bound on the McMillan degree provides an inexpensive alternative to more general model order selection techniques such as the Akaike Information Criteria (AIC).