2,880 research outputs found
Dual VP Classes
No full textWe consider the complexity class ACC^1 and related families of arithmetic circuits. We prove a variety of collapse results, showing several settings in which no loss of computational power results if fan-in of gates is severely restricted, as well as presenting a natural class of arithmetic circuits in which no expressive power is lost by severely restricting the algebraic degree of the circuits. These results tend to support a conjecture regarding the computational power of the complexity class VP over finite algebras, and they also highlight the significance of a class of arithmetic circuits that is in some sense dual to VP.Presented at the 40th International Symposium on Mathematical Foundations of Computer Science (MFCS '15).Published as a chapter in: Mathematical foundations of computer science 2015 : 40th International Symposium, MFCS 2015, Milan, Italy, August 24-28, 2015, Proceedings. Part II, as part of the series
Lecture notes in computer science 9235, edited by G.F. Italiano, G. Pighizzini, & D. Sannella (Berlin: Springer, 2015). LNCS 9235 forms part of the LNCS sublibrary Theoretical computer science and general issues.The final publication is available at http://dx.doi.org/10.1007/978-3-662-48054-0Peer reviewed.The later journal article version of this paper is available from the publisher at http://dx.doi.org/10.1007/s00037-016-0146-7 and at http://dx.doi.org/doi:10.7282/T3ZC8531 (Accepted Manuscript version)
James Douglas Morrison 1924–2013
No full textJim Morrison was born in Scotland in 1924 and completed his PhD studies in X-ray crystallography at the University of Glasgow before taking up a position with CSIRO in Melbourne in 1949. There he became expert in the construction and operation of mass spectrometers, mainly for the study of ion physics. In 1967, he became the Foundation Professor Physical Chemistry at the new La Trobe University in Melbourne where he continued his work in mass spectrometry but was also involved in university leadership that included a period as head of a residential college.Together with his students, he developed the use of compact, rapid-scanning quadrupole mass spectrometers, linking them in series to allow secondary studies (including photochemistry) of particular ions, but also taking advantage of the speed of the quadrupoles to link them to gas chromatographs for the study of mixtures of organic compounds. In all of this he was a pioneer in the use of computers with spectroscopic instruments. Internationally he was a recognized expert, speaking at conferences, establishing collaborations, and spending periods of leave at the University of Utah. After his retirement in 1990 he spent a long period as Emeritus Professor before his death in 2013.</jats:p
Transforming Power Relationships: Leadership, Risk, and Hope. IHS Political Science Series No. 135, May 2013
Get PDFChronic communal conflicts resemble the prisoner’s dilemma. Both communities prefer peace to war. But neither trusts the other, viewing the other’s gain as its own loss, so
potentially shared interests often go unrealized.
Achieving positive-sum outcomes from apparently zero-sum struggles requires a kind of riskembracing leadership. To succeed leaders must: a) see power relations as potentially
positive-sum; b) strengthen negotiating adversaries instead of weakening them; and c) demonstrate hope for a positive future and take great personal risks to achieve it.
Such leadership is exemplified by Nelson Mandela and F.W. de Klerk in the South African democratic transition. To illuminate the strategic dilemmas Mandela and de Klerk faced, we examine the work of Robert Axelrod, Thomas Schelling, and Josep Colomer, who highlight important dimensions of the problem but underplay the role of risk-embracing leadership. Finally we discuss leadership successes and failures in the Northern Ireland settlement and the Israeli-Palestinian conflict
Cold war theology: a controversial religious image of King James VI & I in England and on the Continent in 1603
No full textA former student of James Cameron’s, Ian Hazlett contributes a paper very much in the spirit of his teacher. It considers the afterlife of the King’s (or Negative) Confession, commissioned by James VI of Scotland in 1581 as a clear statement of his Calvinist credentials. By the time he gained the crown of England in 1603 however, his evolving religious views meant it had become a document he sought to distance himself from. Both Protestant and Catholic propagandists and publishers, keen to give a particular picture of the theological sympathies of the new English king, subsequently produced a surprisingly varied selection of versions of the Confession. These sources and what they can tell us about the theology and politics of the day are considered here for the first time in a scholarly study.Publisher PD
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Learning 3-D Models of Object Structure from Images
No full textRecognizing objects in images is an effortless task for most people.Automating this task with computers, however, presents a difficult challengeattributable to large variations in object appearance, shape, and pose. The problemis further compounded by ambiguity from projecting 3-D objects into a 2-D image.In this thesis we present an approach to resolve these issues by modeling objectstructure with a collection of connected 3-D geometric primitives and a separatemodel for the camera. From sets of images we simultaneously learn a generative,statistical model for the object representation and parameters of the imagingsystem. By learning 3-D structure models we are going beyond recognitiontowards quantifying object shape and understanding its variation.We explore our approach in the context of microscopic images of biologicalstructure and single view images of man-made objects composed of block-likeparts, such as furniture. We express detected features from both domains asstatistically generated by an image likelihood conditioned on models for theobject structure and imaging system. Our representation of biological structurefocuses on Alternaria, a genus of fungus comprising ellipsoid and cylindershaped substructures. In the case of man-made furniture objects, we representstructure with spatially contiguous assemblages of blocks arbitrarilyconstructed according to a small set of design constraints.We learn the models with Bayesian statistical inference over structure andcamera parameters per image, and for man-made objects, across categories, suchas chairs. We develop a reversible-jump MCMC sampling algorithm to exploretopology hypotheses, and a hybrid of Metropolis-Hastings and stochastic dynamicsto search within topologies. Our results demonstrate that we can infer both 3-Dobject and camera parameters simultaneously from images, and that doing soimproves understanding of structure in images. We further show how 3-D structuremodels can be inferred from single view images, and that learned categoryparameters capture structure variation that is useful for recognition
Open access self-archiving: An author study
No full textThis, our second author international, cross-disciplinary study on open access had 1296 respondents. Its focus was on self-archiving. Almost half (49%) of the respondent population have self-archived at least one article during the last three years. Use of institutional repositories for this purpose has doubled and usage has increased by almost 60% for subject-based repositories. Self-archiving activity is greatest amongst those who publish the largest number of papers. There is still a substantial proportion of authors unaware of the possibility of providing open access to their work by self-archiving. Of the authors who have not yet self-archived any articles, 71% remain unaware of the option. With 49% of the author population having self-archived in some way, this means that 36% of the total author population (71% of the remaining 51%), has not yet been appraised of this way of providing open access. Authors have frequently expressed reluctance to self-archive because of the perceived time required and possible technical difficulties in carrying out this activity, yet findings here show that only 20% of authors found some degree of difficulty with the first act of depositing an article in a repository, and that this dropped to 9% for subsequent deposits. Another author worry is about infringing agreed copyright agreements with publishers, yet only 10% of authors currently know of the SHERPA/RoMEO list of publisher permissions policies with respect to self-archiving, where clear guidance as to what a publisher permits is provided. Where it is not known if permission is required, however, authors are not seeking it and are self-archiving without it. Communicating their results to peers remains the primary reason for scholars publishing their work; in other words,
researchers publish to have an impact on their field. The vast majority of authors (81%) would willingly comply with a mandate from their employer or research funder to deposit copies of their articles in an institutional or subject-based repository. A further 13% would comply reluctantly; 5% would not comply with such a mandate
Nomada tiftonensis Cockerell 1903
No full textNomada tiftonensis Cockerell, 1903 Counties: Anoka, Beltrami, Houston, Isanti, Morrison, Ramsey.Published as part of Portman, Zachary M., Gardner, Joel, Lane, Ian G., Gerjets, Nicole, Petersen, Jessica D., Ascher, John S., Arduser, Mike, Evans, Elaine C., Boyd, Crystal, Thomson, Robin & Cariveau, Daniel P., 2023, A checklist of the bees (Hymenoptera: Apoidea) of Minnesota, pp. 1-95 in Zootaxa 5304 (1) on page 41, DOI: 10.11646/zootaxa.5304.1.1, http://zenodo.org/record/804856
URI Disambiguation in the Context of Linked Data
No full textThe Linked Data initiative has given rise to an increasing number of RDF datasets, many of which are freely accessible online. These resources often arise as a result of database exports; however sufficient consideration may not be given to the unseen implications caused when they are used in the wider context of the Semantic Web. This paper investigates two popular resources, DBLP and DBpedia, and discusses whether the issues regarding identity management and co-reference resolution have been suitably addressed. We find that a large percentage of authors in DBLP have been conflated, and that disambiguation pages have been incorrectly linked using owl:sameAs within DBpedia. Systems for dealing with these issues are presented, and directions are given for future research
Megachile (Chelostomoides) campanulae
No full textMegachile (Chelostomoides) campanulae (Robertson, 1903) Counties: Aitkin, Anoka, Becker, Cass, Clay, Clearwater, Crow Wing, Dakota, Hennepin, Houston, Kittson, Morrison, Polk, Ramsey, Sibley, Washington, Wright.Published as part of Portman, Zachary M., Gardner, Joel, Lane, Ian G., Gerjets, Nicole, Petersen, Jessica D., Ascher, John S., Arduser, Mike, Evans, Elaine C., Boyd, Crystal, Thomson, Robin & Cariveau, Daniel P., 2023, A checklist of the bees (Hymenoptera: Apoidea) of Minnesota, pp. 1-95 in Zootaxa 5304 (1) on page 68, DOI: 10.11646/zootaxa.5304.1.1, http://zenodo.org/record/804856
The representation of trauma in narrative : a study of six late twentieth century novels
Get PDFThis thesis conducts a close analysis of representations of trauma in six
late twentieth century novels. I construct a theoretical framework by examining
debates about trauma and narrative which have taken place in the fields of
historiography, social studies, psychoanalysis and literary fiction. By drawing on
these debates, I argue that the relationship between narrative and trauma is
paradoxical: narrative is an essential tool, both for working-through and bearing
witness to the trauma, but it can also intentionally or unintentionally be used to
create an inauthentic version of events.
I illustrate the need felt by many late twentieth century theorists for the
development of a narrative form that will be able to produce an effective version
of trauma. This narrative needs to facilitate working-through and enable
witnessing of trauma. However, it must strive to avoid producing a falsifying
version of the trauma. I argue that it can achieve this by acknowledging its own
provisionality and therefore highlighting the limitations but also the necessity of
narrative representations of trauma.
I argue that the six contemporary novels I have chosen are examples of
narratives that strive to develop a more effective means of representing trauma.
The novels explore their concerns about trauma and narrative on both a thematic
and formal level. The story told in each novel follows a similar pattern of events:
in each novel the protagonist is depicted as suffering from the effects of trauma;
they all try to evade their traumas by creating falsifying versions of their
experiences; and they all offered a means of interpreting which will allow them to
work-though and, therefore, bear witness to their traumas. Finally, the six authors
utilise their narrative strategies to teach their readers this therapeutic and ethical
hermeneutics which corresponds with contemporary concerns about trauma and
narrative
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