1,716 research outputs found
On the Conflicting Estimations of Pigment Site Energies in Photosynthetic Complexes: A Case Study of the CP47 Complex
No full textCitation: Reinot, T., Chen, J. H., Kell, A., Jassas, M., Robben, K. C., Zazubovich, V., & Jankowiak, R. (2016). On the Conflicting Estimations of Pigment Site Energies in Photosynthetic Complexes: A Case Study of the CP47 Complex. Analytical Chemistry Insights, 11, 35-48. doi:10.4137/aci.s32151We focus on problems with elucidation of site energies (E-0(n)) for photosynthetic complexes (PSCs) in order to raise some genuine concern regarding the conflicting estimations propagating in the literature. As an example, we provide a stern assessment of the site energies extracted from fits to optical spectra of the widely studied CP47 antenna complex of photosystem II from spinach, though many general comments apply to other PSCs as well. Correct values of E-0(n) for chlorophyll (Chl) a in CP47 are essential for understanding its excitonic structure, population dynamics, and excitation energy pathway(s). To demonstrate this, we present a case study where simultaneous fits of multiple spectra (absorption, emission, circular dichroism, and nonresonant hole-burned spectra) show that several sets of parameters can fit the spectra very well. Importantly, we show that variable emission maxima (690-695 nm) and sample-dependent bleaching in nonresonant hole-burning spectra reported in literature could be explained, assuming that many previously studied CP47 samples were a mixture of intact and destabilized proteins. It appears that the destabilized subpopulation of CP47 complexes could feature a weakened hydrogen bond between the 13(1)-keto group of Chl29 and the PsbH protein subunit, though other possibilities cannot be entirely excluded, as discussed in this work. Possible implications of our findings are briefly discussed
Licklider Correspondence
No full textCorrespondence between Kevin Lynch and J.C.R. Licklider regarding the proposed topic of study. The study discussed became the Perceptual Form of the City, a research project investigating the individual’s perception of the urban landscape
Children and Disasters: A tribute to Professor Kevin Ronan
No full text(c) The Author/sIn 1997, Professor Kevin Ronan published a paper in the first ever edition of the Australasian Journal of Disaster and Trauma Studies, titled “The Effects of a “Benign” Disaster: Symptoms of Post-traumatic Stress in Children Following a Series of Volcanic Eruptions”. Over the next 23 years, Kevin and his many colleagues pursued aspects of children and disasters to both improve practice and advance scholarship in this area. In March 2020 we were saddened by the untimely passing of Kevin. As a tribute to Professor Ronan this special issue of the Australasian Journal of Disaster and Trauma Studies brings together accounts of current research and practice initiatives inspired by, building upon, and directly influenced by Professor Ronan’s work
Continuous metadata flows for distributed multimedia
No full textThe practical use of temporal multimedia has increased markedly in recent years as enabling technologies for the distribution and streaming of media have become available. As a part of this trend, hypermedia systems and models have adapted accordingly to incorporate such distributed multimedia for presentation. Structured interpretation of information has long been a fundamental feature of both open hypermedia systems and knowledge systems. Metadata, in its many forms, has become the cornerstone for providing this structured knowledge above and beyond basic data and information. This thesis presents the rationale and requirements for continuous metadata, which supports the metadata accompanying distributed multimedia throughout the lifecycle of streamed media, from generation, through distribution, to presentation. Throughout this process it is the temporal and continuous nature of the metadata which is paramount. A conceptual framework for continuous metadata is proposed to encapsulate these principles and ideas. Continuous metadata and the associated framework enable the development, in particular, of real-time, collaborative, semantically enriched distributed multimedia applications. Experience building one such system using continuous metadata is evaluated within the framework. An ontology is developed for the system to enable the collation, distribution, and presentation of structure aiding navigation of multimedia, and it is shown how continuous metadata utilising the ontology can be distributed using multicas
Optimizing fully homomorphic encryption
No full textThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 50-51).Fully homomorphic encryption (FHE) presents the possibility of removing the need to trust cloud providers with plaintext data. We present two new FHE scheme variants of BGV'12, both of which remove the need for key switching after a ciphertext multiplication, overall halving the runtime of bootstrapping. We also present multiple implementations of 32-bit integer addition evaluation, the fastest of which spends 16 seconds computing the addition circuit and 278 seconds bootstrapping. We nd that bootstrapping consumes approximately 90% of the computation time for integer addition and secure parameter settings are currently bottlenecked by the memory size of commodity hardware.by Kevin C. King.M. Eng
Author Correction: Environmental variability supports chimpanzee behavioural diversity
No full textThe original version of the Supplementary Information associated with this Article included an incorrect Supplementary Data 1 file, in which three columns (L, M and P) had slightly different variable names from those written in the code. The HTML has been updated to include a corrected version of Supplementary Data 1; the correct version of Supplementary Data 1 can be found as Supplementary Information associated with this Correction.Additional co-authors: Mattia Bessone, Gregory Brazzola, Valentine Ebua Buh, Rebecca Chancellor, Heather Cohen, Charlotte Coupland, Bryan Curran, Emmanuel Danquah, Tobias Deschner, Dervla Dowd, Manasseh Eno-Nku, J. Michael Fay, Annemarie Goedmakers, Anne-Céline Granjon, Josephine Head, Daniela Hedwig, Veerle Hermans, Sorrel Jones, Jessica Junker, Parag Kadam, Mohamed Kambi, Ivonne Kienast, Deo Kujirakwinja, Kevin E. Langergraber, Juan Lapuente, Bradley Larson, Kevin C. Lee, Vera Leinert, Manuel Llana, Sergio Marrocoli, Amelia C. Meier, David Morgan, Emily Neil, Sonia Nicholl, Emmanuelle Normand, Lucy Jayne Ormsby, Liliana Pacheco, Alex Piel, Jodie Preece, Martha M. Robbins, Aaron Rundus, Crickette Sanz, Volker Sommer, Fiona Stewart, Nikki Tagg, Claudio Tennie, Virginie Vergnes, Adam Welsh, Erin G. Wessling, Jacob Willie, Roman M. Wittig, Yisa Ginath Yuh, Klaus Zuberbühler & Hjalmar S. Küh
Disclaimers: The Philadelphia House Price Indices are in the public domain, and
No full textprovided free of charge. Persons are free to share or otherwise use the indices as they see fit, provided that they cite the source and do not modify the original slides. However, the author requests neither the credit nor the blame for any investment or policy decisions undertaken based upon the information contained herein. Finally, although the author is affiliated with the Econsult Corporation, the indices reflect the views and opinion of the author, and not necessarily those of Econsult. © 2005, Kevin C. Gillen, All Rights Reserved. Q: What are the Philadelphia House Price Indices? A: The Philadelphia house price indices (hereafter, HPIs) are a set of indices characterizing the average rate of appreciation in Philadelphia house values over time. They are analogous to a Dow Jones Index, but for house prices rather than stock prices: although the actual level of the indices does not mean much, the change in the index from one time period to another does. In particular, the indices are estimated in such a way so that the percent change in the index over any time period should be representative of the average percent change i
Entity-relation search: context pattern driven extraction and indexing
No full textOur research focuses on searching relations between entities with context constraints. In particular, we are interested in efficiently searching for the relations among medical entities (e.g. diseases, chemicals, species, genes, or mutations) in a professional medical corpus. Existing relation extraction systems, like OpenIE, are able to extract some relations between entities. However, its results are inseparable in terms of extraction contexts, which prevents it from being able to search for the relations of given contexts.
To address this issue, we propose to build an entity-relation search system with an awareness of extraction contexts. In order to achieve this goal, we propose to extract and index contexts for each extracted relation. We evaluate our search model over millions of professional medical abstracts and show that our context indexing is effective to support the task of searching relations into contexts.
Note that this rich and novel system is the product of a collaborative team effort: Tianxiao Zhang, Jiarui Xu and Varun Berry, and supervised by Professor Kevin Chang. While we separately document our individual contributions, we intentionally share some parts of our thesis to improve the readability of our overall system design. This thesis mainly focuses on the design of our context extraction and indexing method.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Zequn Zhang, accepted the attached license on 2016-12-02 at 14:07.The student, Zequn Zhang, submitted this Thesis for approval on 2016-12-02 at 14:13.This Thesis was approved for publication on 2016-12-05 at 13:33.DSpace SAF Submission Ingestion Package generated from Vireo submission #10421 on 2017-02-28 at 14:43:12Made available in DSpace on 2017-03-01T17:02:02Z (GMT). No. of bitstreams: 2
ZHANG-THESIS-2016.pdf: 1756536 bytes, checksum: 705c2090b2f264ad6ed396ba241ccde8 (MD5)
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Previous issue date: 2016-12-05Embargo set by: Seth Robbins for item 98726
Lift date: 2019-03-01T17:02:22Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98726
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Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98726
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Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98726
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Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 98726 on 2019-03-02T10:15:24Z
Licklider Correspondence
No full textCorrespondence between Kevin Lynch and J.C.R. Licklider regarding the proposed
topic of study. The study discussed became the Perceptual Form of the City, a
research project investigating the individual’s perception of the urban landscape
Correction to: The possibilities and practicalities of professional learning in support of Indigenous student experiences in schooling: A systematic review
No full textCorrection to: The Australian Educational Researcher https://doi.org/10.1007/s13384-019-00313-7
In the original publication of the article, the author group was incorrectly published without the co-authors. The correct author group is “Greg Vass, Kevin Lowe, Cathie Burgess, Neil Harrison, Nikki Moodie”.No Full Tex
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