Ahmad M. Al-Saleh, Osama M. K. Kassem,
The Mizil antiform is a gneiss-cored culmination situated near the northern end of the Ar Rayn island arc ... here as the eastern Arabian block (EAB). The Mizil gneiss dome is therefore considered to have formed ...
Tópico(s): High-pressure geophysics and materials
2012 - Elsevier BV | Journal of African Earth Sciences
... phonology (Eisenstein 2013, 2015a), and entrainment (Danescu-Niculescu-Mizil, Gamon, and Dumais 2011; Doyle, Yurovsky, and Frank ... as well as phrasing (Niculae and Danescu-Niculescu-Mizil 2014; Tan, Lee, and Pang 2014) on social ...
Tópico(s): Advanced Text Analysis Techniques
2016 - Association for Computational Linguistics | Computational Linguistics
I. Panea, Deyan Draganov, C. Almagro Vidal, V. Mocanu,
... crosscorrelation to ambient-noise panels recorded in the Mizil area, Romania, aiming to retrieve body-wave reflections. ...
Tópico(s): Seismology and Earthquake Studies
2014 - Society of Exploration Geophysicists | Geophysics
Charlotte Schluger, Jonathan P. Chang, Cristian Danescu-Niculescu-Mizil, Karen Levy,
To address the widespread problem of uncivil behavior, many online discussion platforms employ human moderators to take action against objectionable content, such as removing it or placing sanctions on its authors. Thisreactive paradigm of taking action against already-posted antisocial content is currently the most common form of moderation, and has accordingly underpinned many recent efforts at introducing automation into the moderation process. Comparatively less work has been done to understand ...
Tópico(s): Virology and Viral Diseases
2022 - Association for Computing Machinery | Proceedings of the ACM on Human-Computer Interaction
Justin Cheng, Cristian Danescu-Niculescu-Mizil, Jure Leskovec,
User contributions in the form of posts, comments, and votes are essential to the success of online communities. However, allowing user participation also invites undesirable behavior such as trolling. In this paper, we characterize antisocial behavior in three large online discussion communities by analyzing users who were banned from these communities. We find that such users tend to concentrate their efforts in a small number of threads, are more likely to post irrelevantly, and are more successful ...
Tópico(s): Spam and Phishing Detection
2021 - | Proceedings of the International AAAI Conference on Web and Social Media
Muhammad Bilal Zafar, Krishna P. Gummadi, Cristian Danescu-Niculescu-Mizil,
Discourse on social media platforms is often plagued by acute polarization, with different camps promoting different perspectives on the issue at hand—compare, for example, the differences in the liberal and conservative discourse on the U.S. immigration debate. A large body of research has studied this phenomenon by focusing on the affiliation of groups and individuals. We propose a new finer-grained perspective: studying the impartiality of individual messages. While the notion of message impartiality ...
Tópico(s): Complex Network Analysis Techniques
2021 - | Proceedings of the International AAAI Conference on Web and Social Media
Abdulsahib S Jubran, Oda Mizil Yasser Al-Zamely, Mahdi H. Al-Ammar,
The biosynthesis of nanoparticles by using microorganisms is developing as an ecofriendly method for nanoparticle synthesis because of its cheap, simple and non-toxic. Bacillus sp. can be used for producing iron oxide nanoparticles. In addition, it has the ability for the biosynthesis of Fe3O4 nanoparticles. The nanoparticles producing was evaluated by using ultra violate-visible (UV-visible) and Fourier-transform infrared spectroscopy (FT-IR) methods also the production and size of the nanoparticle ...
Tópico(s): Minerals Flotation and Separation Techniques
2020 - | International Journal of Pharmaceutical Quality Assurance
Justine Zhang, Sendhil Mullainathan, Cristian Danescu-Niculescu-Mizil,
Understanding what leads to effective conversations can aid the design of better computer-mediated communication platforms. In particular, prior observational work has sought to identify behaviors of individuals that correlate to their conversational efficiency. However, translating such correlations to causal interpretations is a necessary step in using them in a prescriptive fashion to guide better designs and policies. In this work, we formally describe the problem of drawing causal links between ...
Tópico(s): Complex Network Analysis Techniques
2020 - Association for Computing Machinery | Proceedings of the ACM on Human-Computer Interaction
Kumar Bhargav Srinivasan, Cristian Danescu-Niculescu-Mizil, Lillian Lee, Chenhao Tan,
Moderators of online communities often employ comment deletion as a tool. We ask here whether, beyond the positive effects of shielding a community from undesirable content, does comment removal actually cause the behavior of the comment's author to improve? We examine this question in a particularly well-moderated community, the ChangeMyView subreddit. The standard analytic approach of interrupted time-series analysis unfortunately cannot answer this question of causality because it fails to distinguish ...
Tópico(s): Spam and Phishing Detection
2019 - Association for Computing Machinery | Proceedings of the ACM on Human-Computer Interaction
Michael Yeomans, Alejandro Kantor, Dustin Tingley,
... of politeness (Brown and Levinson, 1987;Danescu-Niculescu-Mizil et al., 2013;Voigt et al., 2017).We ...
Tópico(s): Language, Metaphor, and Cognition
2019 - | The R Journal
Justine Zhang, Cristian Danescu-Niculescu-Mizil, Christina Sauper, Sean J. Taylor,
Public discussions on social media platforms are an intrinsic part of online information consumption. Characterizing the diverse range of discussions which can arise is crucial for these platforms, as they may seek to organize and curate them. This paper introduces a framework to characterize public discussions, relying on a representation that captures a broad set of social patterns which emerge from the interactions between interlocutors, comments, and audience reactions. We apply our framework ...
Tópico(s): Complex Network Analysis Techniques
2018 - Association for Computing Machinery | Proceedings of the ACM on Human-Computer Interaction
Michael S. Bernstein, Justin Cheng, Cristian Danescu-Niculescu-Mizil, Jure Leskovec,
2017 - Sigma Xi | American Scientist
Justin Cheng, Cristian Danescu-Niculescu-Mizil, Jure Leskovec, Michael S. Bernstein,
2017 - Sigma Xi | American Scientist
Elad Hazan, Satyen Kale, Shai Shalev‐Shwartz,
... COLT 2010), pp. 318--319] and Kleinberg, Niculescu-Mizil, and Sharma [Machine Learning, 80 (2010), pp. 245-- ...
Tópico(s): Machine Learning and Algorithms
2017 - Society for Industrial and Applied Mathematics | SIAM Journal on Computing
Justine Zhang, William Hamilton, Cristian Danescu-Niculescu-Mizil, Dan Jurafsky, Jure Leskovec,
A community's identity defines and shapes its internal dynamics. Our current understanding of this interplay is mostly limited to glimpses gathered from isolated studies of individual communities. In this work we provide a systematic exploration of the nature of this relation across a wide variety of online communities. To this end we introduce a quantitative, language-based typology reflecting two key aspects of a community's identity: how distinctive, and how temporally dynamic it is. By mapping ...
Tópico(s): Complex Network Analysis Techniques
2017 - | Proceedings of the International AAAI Conference on Web and Social Media
William Hamilton, Justine Zhang, Cristian Danescu-Niculescu-Mizil, Dan Jurafsky, Jure Leskovec,
Loyalty is an essential component of multi-community engagement. When users have the choice to engage with a variety of different communities, they often become loyal to just one, focusing on that community at the expense of others. However, it is unclear how loyalty is manifested in user behavior, or whether loyalty is encouraged by certain community characteristics. In this paper we operationalize loyalty as a user-community relation: users loyal to a community consistently prefer it over all ...
Tópico(s): Opinion Dynamics and Social Influence
2017 - | Proceedings of the International AAAI Conference on Web and Social Media
Tim Althoff, Cristian Danescu-Niculescu-Mizil, Dan Jurafsky,
Requests are at the core of many social media systems such as question & answer sites and online philanthropy communities. While the success of such requests is critical to the success of the community, the factors that lead community members to satisfy a request are largely unknown. Success of a request depends on factors like who is asking, how they are asking, when are they asking, and most critically what is being requested, ranging from small favors to substantial monetary donations. We present ...
Tópico(s): Spam and Phishing Detection
2014 - | Proceedings of the International AAAI Conference on Web and Social Media
Justin Cheng, Cristian Danescu-Niculescu-Mizil, Jure Leskovec,
Social media systems rely on user feedback and rating mechanisms for personalization, ranking, and content filtering. However, when users evaluate content contributed by fellow users (e.g., by liking a post or voting on a comment), these evaluations create complex social feedback effects. This paper investigates how ratings on a piece of content affect its author's future behavior. By studying four large comment-based news communities, we find that negative feedback leads to significant behavioral ...
Tópico(s): Spam and Phishing Detection
2014 - | Proceedings of the International AAAI Conference on Web and Social Media
Abhishek Sharma, Franjo Ivančić, Alexandru Niculescu-Mizil, Haifeng Chen, Guofei Jiang,
In this position paper we argue that the availability of "big" monitoring data on Cyber-Physical Systems (CPS) is challenging the traditional CPS modeling approaches by violating their fundamental assumptions. However, big data alsobrings unique opportunities in its wake by enabling new modeling and analytics approaches as well as facilitating novel applications. We highlight a few key challenges andopportunities, and outline research directions for addressing them. To provide a proper context, we ...
Tópico(s): Smart Grid Security and Resilience
2014 - Association for Computing Machinery | ACM SIGMETRICS Performance Evaluation Review
Cristian Danescu-Niculescu-Mizil, Justin Cheng, Jon Kleinberg, Lillian Lee,
Understanding the ways in which information achieves widespread public awareness is a research question of significant interest. We consider whether, and how, the way in which the information is phrased -- the choice of words and sentence structure -- can affect this process. To this end, we develop an analysis framework and build a corpus of movie quotes, annotated with memorability information, in which we are able to control for both the speaker and the setting of the quotes. We find that there are ...
Tópico(s): Sentiment Analysis and Opinion Mining
2012 - RELX Group (Netherlands) | SSRN Electronic Journal
Robert Kleinberg, Alexandru Niculescu-Mizil, Yogeshwer Sharma,
We study on-line decision problems where the set of actions that are available to the decision algorithm varies over time. With a few notable exceptions, such problems remained largely unaddressed in the literature, despite their applicability to a large number of practical problems. Departing from previous work on this “Sleeping Experts” problem, we compare algorithms against the payoff obtained by the best ordering of the actions, which is a natural benchmark for this type of problem. We study ...
Tópico(s): Machine Learning and Algorithms
2010 - Springer Science+Business Media | Machine Learning
Cynthia Rudin, Robert E. Schapire,
... by Cortes and Mohri, and Caruana and Niculescu-Mizil, about the excellent performance of AdaBoost as a ...
Tópico(s): Bayesian Modeling and Causal Inference
2009 - The MIT Press | Journal of Machine Learning Research
Tom Fawcett, Alexandru Niculescu-Mizil,
Classifier calibration is the process of converting classifier scores into reliable probability estimates. Recently, a calibration technique based on isotonic regression has gained attention within machine learning as a flexible and effective way to calibrate classifiers. We show that, surprisingly, isotonic regression based calibration using the Pool Adjacent Violators algorithm is equivalent to the ROC convex hull method.
Tópico(s): Machine Learning and Data Classification
2007 - Springer Science+Business Media | Machine Learning
Rich Caruana, Art Munson, Alexandru Niculescu-Mizil,
We investigate four previously unexplored aspects of ensemble selection, a procedure for building ensembles of classifiers. First we test whether adjusting model predictions to put them on a canonical scale makes the ensembles more effective. Second, we explore the performance of ensemble selection when different amounts of data are available for ensemble hillclimbing. Third, we quantify the benefit of ensemble selection's ability to optimize to arbitrary metrics. Fourth, we study the performance ...
Tópico(s): Data Mining Algorithms and Applications
2006 - Institute of Electrical and Electronics Engineers | Proceedings
Cynthia Rudin, Corinna Cortes, Mehryar Mohri, Robert E. Schapire,
... by Cortes and Mohri, and Caruana and Niculescu-Mizil, about the excellent performance of AdaBoost as a ...
Tópico(s): Game Theory and Voting Systems
2005 - Springer Science+Business Media | Lecture notes in computer science
V. Rǎileanu, D. Taloş, V. Varodin, D. Stiopol,
This work presents the interpretation of a deep seismic reflection profile recorded in the northern extremity of the Moesian Platform. The seismic time section and the reflectivity histogram show the presence of two distinct zones: good reflectivity in the upper part for the sedimentary overburden, and a continuous decrease of reflectivity with depth for the deeper part (crystalline zone). A correlation between the reflectivity of the crust, the age of the platform and heat flow was also established. ...
Tópico(s): Geological formations and processes
1993 - Elsevier BV | Tectonophysics
Jonathan P. Chang, Charlotte Schluger, Cristian Danescu-Niculescu-Mizil,
Incivility remains a major challenge for online discussion platforms, to such an extent that even conversations between well-intentioned users can often derail into uncivil behavior. Traditionally, platforms have relied on moderators to---with or without algorithmic assistance---take corrective actions such as removing comments or banning users. In this work we propose a complementary paradigm that directly empowers users by proactively enhancing their awareness about existing tension in the conversation ...
Tópico(s): Gender, Feminism, and Media
2022 - Association for Computing Machinery | Proceedings of the ACM on Human-Computer Interaction
Osama M. K. Kassem, Ahmad M. Al-Saleh,
Tópico(s): High-pressure geophysics and materials
2018 - Pleiades Publishing | Geotectonics
Antónia Hatalova, Jiřı́ Schwarz, Mirjana Gotić, Miroslav Penka, M Hrubisko, Rajko Kušec, Miklós Egyed, Martin Grießhammer, Maria Podolak‐Dawidziak, Andrzej Hellmann, Sergiy Klymenko, Emilia Niculescu‐Mizil, Petro E. Petrides, Sebastian Grosicki, Matjaž Sever, Nathan Cantoni, Jürgen Thiele, Dominik Wolf, Heinz Gisslinger,
Abstract Objectives To present the Central European Myeloproliferative Neoplasm Organisation (CEMPO) treatment recommendations for polycythaemia vera (PV). Methods During meetings held from 2015 through 2017, CEMPO discussed PV and its treatment and recent data. Results PV is associated with increased risks of thrombosis/thrombo‐haemorrhagic complications, fibrotic progression and leukaemic transformation. Presence of Janus kinase (JAK)‐2 gene mutations is a diagnostic marker and standard diagnostic ...
Tópico(s): Kruppel-like factors research
2018 - Wiley | European Journal Of Haematology
Mahmood Ali Abed Al-Khafaji, Rana A. K. Al-Refai’a, Oda Mizil Yasser Al-Zamely,
Nanoparticles are now attracting a lot of attention due to their tiny size and amazing characteristics including high surface area, cost-effectiveness, and readily rotatable morphology and form. Plant-based nanoparticle production is not only environmentally benign, but also inexpensive and simple. The Artemisia plant was utilised to synthesise in our research (Cu NPs). Nano copper was characterised using a UV–visible spectrophotometer, FTIR (Fourier Transform Infrared) spectroscopic study, XRD, SEM, ...
Tópico(s): Essential Oils and Antimicrobial Activity
2021 - Elsevier BV | Materials Today Proceedings