2,108 research outputs found
Quasi-cyclic Generalized LDPC codes with low error floors
No full textIn this paper, a novel methodology for designing structured generalized LDPC (G-LDPC) codes is presented. The proposed design results in quasi-cyclic G-LDPC codes for which efficient encoding is feasible through shift-register-based circuits. The structure imposed on the bipartite graphs, together with the choice of simple component codes, leads to a class of codes suitable for fast iterative decoding. A pragmatic approach to the construction of G-LDPC codes is proposed. The approach is based on the substitution of check nodes in the protograph of a low-density parity-check code with stronger nodes based, for instance, on Hamming codes. Such a design approach, which we call LDPC code doping, leads to low-rate quasi-cyclic G-LDPC codes with excellent performance in both the error floor and waterfall regions on the additive white Gaussian noise channel
The Same Old New Normal
No full textJournal #14 from Media Rise's Quarantined Across Borders Collection by Ryan Arron D'Souza. From United Arab Emirates. Quarantined in United States, Florida.Media Rise Publications. Quarantined Across Borders Collection. Edited by Dr. Srividya "Srivi" Ramasubramanian.The author tries to make sense of the ideas and practices normalized during quarantine
A Bayesian hierarchical model for risk assessment of methylmercury
No full textThis article uses a Bayesian hierarchical model to quantify the adverse health effects associated with in-utero exposure to methylmercury. By allowing for study-to-study as well as outcome-to-outcome variability, the approach provides a useful meta-analytic tool for multi-outcome, multi-study environmental risk assessments. The analysis presented here expands on the findings of a National Academy of Sciences (NAS) committee, charged with advising the United States Environmental Protection Agency (EPA) on an appropriate approach to conducting a risk assessment for methylmercury. The NAS committee, for which the senior author (Ryan) was a committee member, reviewed the findings from several conflicting studies and reported the results from a Bayesian hierarchical model that synthesized information across several studies and for several outcomes. Although the NAS committee did not suggest that the hierarchical model be used as the actual basis for a methylmercury risk assessment, the results from the model were used to justify and support the final recommendation that the risk analysis be based on data from a study conducted in the Faroe Islands, which had found an association between in-utero exposure to methylmercury and impaired neurological development. We consider a variety of statistical issues, but particularly sensitivity to model specification. © 2003 American Statistical Association and the International Biometric Society
Novel multi-electrode probe with three dimensional spatial resolution for simultaneous recording/stimulation in long-term adaptive deep brain stimulaton
No full textWhen treating neurological disorders such as Parkinson’s Disease (PD) modern technologies experience many deficiencies and/or limitations that researchers have been working towards improving. The problems that occur with modern devices are inadequate mechanical robustness, glial scarring due to tissue damage, reduced target area localization, and inability to simultaneously record/stimulate in vivo post implantation. The research presented here resolves the issues stated above, delivering the design of a novel Multi-Electrode Probe with 3-D spatial resolution and an on-board preamplification/filtering chip capable of simultaneous recording/stimulation. The probe has been modeled in Wildfire Pro/Engineer 4.0 and Finite Element Analysis (FEA) was performed in COMSOL Multiphysics 3.4. The neural chip which consists of both analog and digital circuitry was designed with Taiwan Semiconductor’s (TSMC) 0.18µm CMOS technology. The very large scale integration (VLSI) design and simulation was performed in Cadence Schematic and Spectre, respectively. The aforementioned work was done in hopes of delivering a neural probe that can eventually be used in a closed loop system for Adaptive Deep Brain Stimulation treatment.Ph.D.Includes bibliographical referencesIncludes vitaby Ryan M. Elkhol
Corrigendum: Expression analysis of candidate genes regulating successional tooth formation in the human embryo
No full textA corrigendum on
Expression analysis of candidate genes regulating successional tooth formation in the human embryo
by Olley, R., Xavier, G. M., Seppala, M., Volponi, A. A., Geoghegan, F., Sharpe, P. T., et al. (2014). Front. Physiol. 5:445. doi: 10.3389/fphys.2014.00445
The author Ryan Olley should appear as Olley RC on the published article “Expression analysis of candidate genes regulating successional tooth formation in the human embryo.”
The original article was updated
Shifting and persosting in the face of failure: Learning from what did not work
No full textSocial justice activism demands coordinated, concentrated efforts to move the needle in a positive direction. In the author's nine years as a social justice educator, he led multiple large- and small-scale projects for social justice within higher education. In many ways, those efforts failed to create a lasting impact. In the higher education ecosystem, they also took away time from the kind of promotable work which would benefit his case for tenure and promotion. Trying - and failing - to effect institutional changes left him emotionally, psychologically, and physically exhausted. Beyond that, he suffered from feelings of loneliness, exclusion, and lack of direction. For a long time, the author blamed himself for the failure to change the institution to be a place in which he felt comfortable. He also failed to cope with these negative experiences and emotions, often seething in frustration or anger or avoiding similar situations of vulnerability or creativity. It took years for him to remember and internalize lessons of persistence and shifting appraisals in order to maintain motivation for action and survive the stressors of working within an oppressive system.Published versio
‘Powers of a squirrel, and also a girl’: Squirrel Girl and alternatives for women in superhero comic-books – an interview with Ryan North
No full textRyan North is a Canadian author who writes a host of comics, most notably Dinosaur Comics (www.
qwantz.com, 2003-present), Adventure Time (2012–2014, winner of both an Eisner and a Harvey Award),
The Midas Flesh (2013) and The Unbeatable Squirrel Girl (R. North and E. Henderson, 2015). North
is also the creator of To Be Or Not To Be (2013), a choose-your-own-adventure version of Hamlet funded
through Kickstarter, published as a book and also as a computer game. North has recently followed this with
Romeo And/Or Juliet (2016)
Questions, Methodology, and Action: A Response to Ryan & Muller
No full textIn this article, the author engages critically with the arguments presented in Ryan and Muller’s 2023 Florida Law Review article. The response addresses key methodological concerns and questions raised by the original authors, offering alternative perspectives and insights. By scrutinizing the methods employed and the conclusions drawn, the author aims to clarify ambiguities and propose more robust approaches for legal analysis. The article highlights the importance of rigorous methodology in legal scholarship and advocates for a more nuanced understanding of the issues discussed. This response contributes to the ongoing scholarly dialogue, enhancing the discourse on the subject matter
Editing as a Performative and Collaborative Practice. Ryan Trecartin's Hectic Video Collages
No full textThis contribution examines editing as an art practice focusing on Ryan Trecartin’s work. Trecartin is definitely one of those artists among the younger generations who is experimenting in a more radical and crosswise manner with the new media and the opportunities of using, sharing and mobilizing images offered by the Internet, beyond copyright and the proper citation of “poached” materials. In Trecartin’s videos, images, sounds and words are assembled in a digital hypertext − schizophrenic and hypnotic − of which the artist is the main but not exclusive author. The analysis focuses on central aspects of Trecartin’s practice, such as the supposed re-materialisation of the art object related to the idea of “an Internet of things”; the visual re-codification that generates new aesthetic standards, such as the so-called “post-Internet style”; and co-working as a contemporary art practice and remedy to the “death of the author” that was pessimistically theorised throughout the 20th and 21st century
Effectiveness of teacher-child interaction training (TCIT): a multiple probe design across classrooms in a day-treatment preschool
No full textThe current study assessed the effectiveness of Teacher-Child Interaction Training (TCIT), an adaptation of Eyeberg’s Parent-Child Interaction Therapy (PCIT), on teacher and child behaviors in a day-treatment preschool setting. The sample included 5 day-treatment classrooms in an urban, socioeconomically disadvantaged, and culturally diverse setting. The study utilized a concurrent multiple probe design across classroom settings (3 training groups consisting of 5 classrooms) to evaluate the effects of didactic and in-vivo coaching on teacher and child behaviors in the training and classroom settings. Results indicated that all teachers’ use of positive behaviors increased and negative behaviors decreased during pull-out sessions; all 5 teachers attained CDI and TDI mastery criteria. Results also indicated some evidence of spontaneous generalization of teachers’ use of Labeled Praises to the classroom setting, while other teacher behaviors did not generalize. Results on child behavior were variable and failed to demonstrate consistent improvements in the classroom setting; this finding is understood given the lack of generalization of teachers’ behaviors to the classroom. These findings provide initial support for the use of TCIT to improve teachers’ behavior management skills, as well as support for the feasibility of implementing TCIT with fidelity to the PCIT manual. Additionally, the study offers insight into the possible need for additional adaptations to train teachers in how and when to implement the TCIT skills under high stress in-vivo classroom conditions.Psy. D.Includes bibliographical referencesby Ryan John Madiga
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