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Articles 1 - 30 of 45
Full-Text Articles in Physical Sciences and Mathematics
An Affordance-Based Framework For Human Computation And Human-Computer Collaboration, R. Jordan Crouser, Remco Chang
An Affordance-Based Framework For Human Computation And Human-Computer Collaboration, R. Jordan Crouser, Remco Chang
Computer Science: Faculty Publications
Visual Analytics is “the science of analytical reasoning facilitated by visual interactive interfaces” [70]. The goal of this field is to develop tools and methodologies for approaching problems whose size and complexity render them intractable without the close coupling of both human and machine analysis. Researchers have explored this coupling in many venues: VAST, Vis, InfoVis, CHI, KDD, IUI, and more. While there have been myriad promising examples of human-computer collaboration, there exists no common language for comparing systems or describing the benefits afforded by designing for such collaboration. We argue that this area would benefit significantly from consensus about …
Interface Design For Unmanned Vehicle Supervision Through Hybrid Cognitive Task Analysis, Jamie C. Macbeth, M. L. Cummings, Luca F. Bertuccelli, Amit Surana
Interface Design For Unmanned Vehicle Supervision Through Hybrid Cognitive Task Analysis, Jamie C. Macbeth, M. L. Cummings, Luca F. Bertuccelli, Amit Surana
Computer Science: Faculty Publications
While there is currently significant interest in developing Unmanned Aerial Systems (UASs) that can be supervised by a single operator, the majority of these systems focus on Intelligence, Surveillance, and Reconnaissance (ISR) domains. One domain that has received significantly less attention is the use of multiple UASs to insert or extract supplies or people. To this end, MAVIES (Multi-Autonomous Vehicle Insertion-Extraction System) was developed to allow a single operator the ability to supervise a primary cargo Unmanned Aerial Vehicle (UAV) along with multiple scouting UAVs. This paper will detail the development of the design requirements generated through a Hybrid Cognitive …
Using Variable-Rate Alerting To Counter Boredom In Human Supervisory Control, Armen A. Mkrtchyan, Jamie C. Macbeth, Erin T. Solovey, Jason C. Ryan, M. L. Cummings
Using Variable-Rate Alerting To Counter Boredom In Human Supervisory Control, Armen A. Mkrtchyan, Jamie C. Macbeth, Erin T. Solovey, Jason C. Ryan, M. L. Cummings
Computer Science: Faculty Publications
A low task load, long duration experiment was conducted to evaluate the impact of cyclical attention switching strategies on operator performance in supervisory domains. The impetus for such a study stems from the lack of prior work to improve human-system performance in low task load supervisory domains through the use of design interventions. In this study, a design intervention in the form of auditory alerts is introduced and the effects of the alerts are examined. The test bed consists of a video game-like simulation environment, which allows a single opera-tor the ability to supervise multiple unmanned vehicles. Each participant in …
L ∞-Algebra Actions, Rajan Amit Mehta, Marco Zambon
L ∞-Algebra Actions, Rajan Amit Mehta, Marco Zambon
Mathematics Sciences: Faculty Publications
We define the notion of action of an L -algebra g on a graded manifold M, and show that such an action corresponds to a homological vector field on g[1]×M of a specific form. This generalizes the correspondence between Lie algebra actions on manifolds and transformation Lie algebroids. In particular, we consider actions of g on a second L -algebra, leading to a notion of "semidirect product" of L -algebras more general than those we found in the literature.
String-Wrapped Rotating Disks, Joseph O'Rourke
String-Wrapped Rotating Disks, Joseph O'Rourke
Computer Science: Faculty Publications
Let the centers of a finite number of disjoint, closed disks be pinned to the plane, but with each free to rotate about its center. Given an arrangement of such disks with each labeled + or -, we investigate the question of whether they can be all wrapped by a single loop of string so that, when the string is taut and circulates, it rotates by friction all the ⊕-disks counterclockwise and all the ⊖-disks clockwise, without any string-rubbing conflicts. We show that although this is not always possible, natural disk-separation conditions guarantee a solution. We also characterize the hexagonal …
Towards Biophysical Validation Of Constraint Modeling For Rigidity Analysis Of Proteins, Filip Jagodzinski, Ileana Streinu
Towards Biophysical Validation Of Constraint Modeling For Rigidity Analysis Of Proteins, Filip Jagodzinski, Ileana Streinu
Computer Science: Faculty Publications
Proteins are dynamic molecules, and understanding how they flex and bend provides fundamental insights to their functions. Methods such as molecular dynamics are computationally expensive, and can simulate protein motions on limited timescales. Rigidity analysis is an alternative method, in which a protein structure is analyzed to infer which portions of the molecule are flexible. To perform rigidity analysis, a model is first constructed in which various inter-atomic stabilizing interactions are modeled according to their strength. No detailed study has been conducted as to what is the most plausible, chemically validated modeling scheme. All previous implementations have relied on heuristics, …
Towards Sequence-Based Dna Flexibility Analysis, Emily Flynn, Filip Jagodzinski, Ileana Streinu
Towards Sequence-Based Dna Flexibility Analysis, Emily Flynn, Filip Jagodzinski, Ileana Streinu
Computer Science: Faculty Publications
In this poster, we present an extension to our freely available KINARI-Web server to identify rigid and flexible regions of nucleic acids and protein-nucleic acid complexes contained in the Protein Data Bank (PDB). The goal is to explore the effect of DNA and RNA on the rigidity and stability of these structures. We also propose an approach for determining DNA rigidity based solely on sequence. Currently, only the rigidity of DNA molecules whose structures have been deposited in the PDB (approx. <4,000 files) can be analyzed. Once fine-tuned and validated, this new coordinate-free method for investigating DNA flexibility could be applied to the more than 135 million sequences in GenBank, and to nanostructure design.
Understanding Visualization By Understanding Individual Users, Caroline Ziemkiewicz, Alvitta Ottley, R. Jordan Crouser, Krysta Chauncey, Sara L. Su, Remco Chang
Understanding Visualization By Understanding Individual Users, Caroline Ziemkiewicz, Alvitta Ottley, R. Jordan Crouser, Krysta Chauncey, Sara L. Su, Remco Chang
Computer Science: Faculty Publications
No abstract provided.
Synthesis Of Di- And Trisubstituted Azulenes Using A Danheiser Annulation As The Key Step: An Advanced Organic Laboratory Experiment, Rebecca M. Thomas, Kevin M. Shea
Synthesis Of Di- And Trisubstituted Azulenes Using A Danheiser Annulation As The Key Step: An Advanced Organic Laboratory Experiment, Rebecca M. Thomas, Kevin M. Shea
Chemistry: Faculty Publications
This three-week advanced-level organic experiment provides students with an inquiry-based approach focused on learning traditional skills such as primary literature interpretation, reaction design, flash column chromatography, and NMR analysis. Additionally, students address higher-order concepts such as the origin of azulene’s blue color, the mechanism of the Danheiser annulation (step 1), identification of an unknown reaction byproduct, and rationalization of a selective electrophilic aromatic substitution reaction (step 2). Students are initially drawn in by the fascinating color of azulene and remain engaged by the intriguing questions that naturally occur during this investigation.
Priming Locus Of Control To Affect Performance, Alvitta Ottley, R. Jordan Crouser, Caroline Ziemkiewicz, Remco Chang
Priming Locus Of Control To Affect Performance, Alvitta Ottley, R. Jordan Crouser, Caroline Ziemkiewicz, Remco Chang
Computer Science: Faculty Publications
Recent research suggests that the personality trait Locus of Control (LOC) can be a reliable predictor of performance when learn- ing a new visualization tool. While these results are compelling and have direct implications to visualization design, the relation- ship between a user’s LOC measure and their performance is not well understood. We hypothesize that there is a dependent relation- ship between LOC and performance; specifically, a person’s orientation on the LOC scale directly influences their performance when learning new visualizations. To test this hypothesis, we conduct an experiment with 300 subjects using Amazon’s Mechanical Turk. We adapt techniques from …
Body-And-Cad Geometric Constraint Systems, Kirk Haller, Audrey Lee-St.John, Meera Sitharam, Ileana Streinu, Neil White
Body-And-Cad Geometric Constraint Systems, Kirk Haller, Audrey Lee-St.John, Meera Sitharam, Ileana Streinu, Neil White
Computer Science: Faculty Publications
Motivated by constraint-based CAD software, we develop the foundation for the rigidity theory of a very general model: the body-and-cad structure, composed of rigid bodies in 3D constrained by pairwise coincidence, angular and distance constraints. We identify 21 relevant geometric constraints and develop the corresponding infinitesimal rigidity theory for these structures. The classical body-and-bar rigidity model can be viewed as a body-and-cad structure that uses only one constraint from this new class. As a consequence, we identify a new, necessary, but not sufficient, counting condition for minimal rigidity of body-and-cad structures: nested sparsity. This is a slight generalization of the …
Precision Measurement Of The 6he Half-Life And The Weak Axial Current In Nuclei, A. Knecht, R. Hong, D. W. Zumwalt, B. G. Delbridge, A. García, P. Müller, H. E. Swanson, I. S. Towner, S. Utsuno, William Williams, C. Wrede
Precision Measurement Of The 6he Half-Life And The Weak Axial Current In Nuclei, A. Knecht, R. Hong, D. W. Zumwalt, B. G. Delbridge, A. García, P. Müller, H. E. Swanson, I. S. Towner, S. Utsuno, William Williams, C. Wrede
Physics: Faculty Publications
Background: The β decays of 3H and 6He can play an important role in testing nuclear wave-function calculations and fixing low-energy constants in effective-field theory approaches. However, there exists a large discrepancy between previous measurements of the 6He half-life. Purpose: Our measurement aims at resolving this long-standing discrepancy in the 6He half-life and providing a reliable ft value and Gamow-Teller matrix element for comparison with theoretical ab initio calculations. Method: We measured the 6He half-life by counting the β-decay electrons with two scintillator detectors operating in coincidence. Results: The measured 6He half-life is 806.89±0.11 stat-0.19+0.23syst ms corresponding to a relative …
Group-Theoretical Derivation Of Angular Momentum Eigenvalues In Spaces Of Arbitrary Dimensions, Tamar Friedmann, C. R. Hagen
Group-Theoretical Derivation Of Angular Momentum Eigenvalues In Spaces Of Arbitrary Dimensions, Tamar Friedmann, C. R. Hagen
Mathematics Sciences: Faculty Publications
The spectrum of the square of the angular momentum in arbitrary dimensions is derived using only group theoretical techniques. This is accomplished by application of the Lie algebra of the noncompact group O(2, 1). Illuminating discussions with Jonathan Pakianathan and his comments on a draft are gratefully acknowledged. This work was supported in part by (U.S.) Department of Energy (DOE), Grant No. DE-FG02-91ER40685.
An Atom Counter For Measuring 81Kr And 85Kr In Environmental Samples, W. Jiang, K. Bailey, Z. T. Lu, P. Mueller, T. P. O'Connor, C. F. Cheng, S. M. Hu, R. Purtschert, N. C. Sturchio, Y. R. Sun, William Williams, G. M. Yang
An Atom Counter For Measuring 81Kr And 85Kr In Environmental Samples, W. Jiang, K. Bailey, Z. T. Lu, P. Mueller, T. P. O'Connor, C. F. Cheng, S. M. Hu, R. Purtschert, N. C. Sturchio, Y. R. Sun, William Williams, G. M. Yang
Physics: Faculty Publications
Due to its simple production and transport processes in the terrestrial environment, the long-lived noble-gas isotope 81Kr is the ideal tracer for old water and ice in the age range of 10 5-10 6 years, a range beyond the reach of 14C. 81Kr-dating, a concept pursued in the past four decades by numerous laboratories employing a variety of techniques, is now available for the first time to the earth science community at large. This is made possible by the development of ATTA-3, an efficient and selective atom counter based on the Atom Trap Trace Analysis method and capable of measuring …
An Aronsson Type Approach To Extremal Quasiconformal Mappings, Luca Capogna, Andrew Raich
An Aronsson Type Approach To Extremal Quasiconformal Mappings, Luca Capogna, Andrew Raich
Mathematics Sciences: Faculty Publications
We study C 2 extremal quasiconformal mappings in space and establish necessary and sufficient conditions for a 'localized' form of extremality in the spirit of the work of G. Aronsson on absolutely minimizing Lipschitz extensions. We also prove short-time existence for smooth solutions of a gradient flow of QC diffeomorphisms associated to the extremal problem.
Massively Distributed Authorship Of Academic Papers, Bill Tomlinson, Joel Ross, Paul Andre, Eric P.S. Baumer, Donald J. Patterson, Joseph Corneli, Martin Mahaux, Syavash Nobarany, Marco Lazzari, Birgit Penzenstadler, Andrew W. Torrance, David J. Callele, Gary M. Olson, Six Silberman, Marcus Ständer, Fabio Romancini Palamedi, Albert Ali Salah, Eric Morrill, Xavier Franch, Florian Mueller, Joseph Kaye, Rebecca W. Black, Marisa L. Cohn, Patrick C. Shih, Johanna Brewer, Nitesh Goyal, Pirjo Näkki, Jeff Huang, Nilufar Baghaei, Craig Saper
Massively Distributed Authorship Of Academic Papers, Bill Tomlinson, Joel Ross, Paul Andre, Eric P.S. Baumer, Donald J. Patterson, Joseph Corneli, Martin Mahaux, Syavash Nobarany, Marco Lazzari, Birgit Penzenstadler, Andrew W. Torrance, David J. Callele, Gary M. Olson, Six Silberman, Marcus Ständer, Fabio Romancini Palamedi, Albert Ali Salah, Eric Morrill, Xavier Franch, Florian Mueller, Joseph Kaye, Rebecca W. Black, Marisa L. Cohn, Patrick C. Shih, Johanna Brewer, Nitesh Goyal, Pirjo Näkki, Jeff Huang, Nilufar Baghaei, Craig Saper
Computer Science: Faculty Publications
Wiki-like or crowdsourcing models of collaboration can provide a number of benefits to academic work. These techniques may engage expertise from different disciplines, and potentially increase productivity. This paper presents a model of massively distributed collaborative authorship of academic papers. This model, developed by a collective of thirty authors, identifies key tools and techniques that would be necessary or useful to the writing process. The process of collaboratively writing this paper was used to discover, negotiate, and document issues in massively authored scholarship. Our work provides the first extensive discussion of the experiential aspects of large-scale collaborative research.
Indy R&D: Doing Hci Research Off The Beaten Path, Amanda Williams, Johanna Brewer
Indy R&D: Doing Hci Research Off The Beaten Path, Amanda Williams, Johanna Brewer
Computer Science: Faculty Publications
This panel discusses independent research and development in HCI. We focus on possible models for Indy R&D operations, supporting infrastructures, practical methods, and taking advantage of academic skills in the transition. Panel participants have experience in several different models of funding, conducting, and disseminating results from independent research. We will provide the audience with practical tips to help them decide if Indy R&D is right for them, and if so, help them do it. © 2012 Authors.
From Pop-Up Cards To Coffee-Cup Caustics: The Knight's Visor, Stephanie Jakus, Joseph O'Rourke
From Pop-Up Cards To Coffee-Cup Caustics: The Knight's Visor, Stephanie Jakus, Joseph O'Rourke
Computer Science: Faculty Publications
As a pedagogical exercise, we derive the shape of a particularly elegant pop-up card design, and show that it connects to a classically studied plane curve that is (among other interpretations) a caustic of a circle
Transcendental Thermodynamics, Richard E. Morel, George Fleck
Transcendental Thermodynamics, Richard E. Morel, George Fleck
Kahn Institute Projects
Thermodynamics is often viewed as a narrow, introspective discipline, trapped by its origins in the 18th and 19th centuries. By dramatic contrast, we show that the Fourth Law of Thermodynamics provides explanations and interpretations of all natural events, extending across artificial boundaries of tradition- al academic disciplines. The Fourth Law of Thermodynamics states that far-from-equilibrium systems increase entropy at the maximum rate available to them. This broadly inclusive paradigm applies to systems from molecules, to organisms, to the biosphere. The Fourth Law is the Law of Evolution. All systems that communicate with their environment exhibit self-organization and self-optimization, enabling the …
The Source Counts Of Submillimetre Galaxies Detected At Λ= 1.1 Mm, K. S. Scott, G. W. Wilson, I. Aretxaga, J. E. Austermann, E. L. Chapin, J. S. Dunlop, H. Ezawa, M. Halpern, B. Hatsukade, D. H. Hughes, R. Kawabe, S. Kim, K. Kohno, James D. Lowenthal, A. Montaña, K. Nakanishi, T. Oshima, D. Sanders, D. Scott, N. Scoville, Y. Tamura, D. Welch, M. S. Yun, M. Zeballos
The Source Counts Of Submillimetre Galaxies Detected At Λ= 1.1 Mm, K. S. Scott, G. W. Wilson, I. Aretxaga, J. E. Austermann, E. L. Chapin, J. S. Dunlop, H. Ezawa, M. Halpern, B. Hatsukade, D. H. Hughes, R. Kawabe, S. Kim, K. Kohno, James D. Lowenthal, A. Montaña, K. Nakanishi, T. Oshima, D. Sanders, D. Scott, N. Scoville, Y. Tamura, D. Welch, M. S. Yun, M. Zeballos
Astronomy: Faculty Publications
The source counts of galaxies discovered at submillimetre and millimetre wavelengths provide important information on the evolution of infrared-bright galaxies. We combine the data from six blank-field surveys carried out at 1.1mm with AzTEC, totalling 1.6deg in area with root-mean-square depths ranging from 0.4 to 1.7mJy, and derive the strongest constraints to date on the 1.1 mm source counts at flux densities S = 1-12mJy. Using additional data from the AzTEC Cluster Environment Survey to extend the counts to S ∼ 20mJy, we see tentative evidence for an enhancement relative to the exponential drop in the counts at S ∼ …
A Simple Bijection Between Standard 3×N Tableaux And Irreducible Webs For 𝔰𝔩3, Julianna Tymoczko
A Simple Bijection Between Standard 3×N Tableaux And Irreducible Webs For 𝔰𝔩3, Julianna Tymoczko
Mathematics Sciences: Faculty Publications
Combinatorial spiders are a model for the invariant space of the tensor product of representations. The basic objects, webs, are certain directed planar graphs with boundary; algebraic operations on representations correspond to graph-theoretic operations on webs. Kuperberg developed spiders for rank 2 Lie algebras and 𝔰𝔩2. Building on a result of Kuperberg’s, Khovanov-Kuperberg found a recursive algorithm giving a bijection between standard Young tableaux of shape 3 × n and irreducible webs for 𝔰𝔩3whose boundary vertices are all sources. In this paper, we give a simple and explicit map from standard Young tableaux of shape 3 …
Using Rigidity Analysis To Probe Mutation-Induced Structural Changes In Proteins, Filip Jagodzinski, Jeanne Hardy, Ileana Streinu
Using Rigidity Analysis To Probe Mutation-Induced Structural Changes In Proteins, Filip Jagodzinski, Jeanne Hardy, Ileana Streinu
Computer Science: Faculty Publications
Predicting the effect of a single amino acid substitution on the stability of a protein structure is a fundamental task in macromolecular modeling. It has relevance to drug design and understanding of disease-causing protein variants. We present KINARI-Mutagen, a web server for performing in silico mutation experiments on protein structures from the Protein Data Bank. Our rigidity-theoretical approach permits fast evaluation of the effects of mutations that may not be easy to perform in vitro, because it is not always possible to express a protein with a specific amino acid substitution. We use KINARI-Mutagen to identify critical residues, and we …
Mixed-Initiative Strategies For Real-Time Scheduling Of Multiple Unmanned Vehicles, Andrew S. Clare, Jamie Macbeth, Mary L. Cummings
Mixed-Initiative Strategies For Real-Time Scheduling Of Multiple Unmanned Vehicles, Andrew S. Clare, Jamie Macbeth, Mary L. Cummings
Computer Science: Faculty Publications
Advances in autonomy have made it possible to invert the typical operator-to-unmanned vehicle ratio so that a single operator can now control multiple heterogeneous Unmanned Vehicles (UVs). Real-time scheduling and task assignment for multiple UVs in uncertain environments will require the computational ability of optimization algorithms combined with the judgment and adaptability of human supervisors through mixed-initiative systems. The goal of this paper is to analyze the interactions between operators and scheduling algorithms in two human- in-the-loop multiple UV control experiments. The impact of real-time operator modifications to the objective function of an optimization algorithm for multi-UV scheduling is described. …
Unfolding Prismatoids As Convex Patches: Counterexamples And Positive Results, Joseph O'Rourke
Unfolding Prismatoids As Convex Patches: Counterexamples And Positive Results, Joseph O'Rourke
Computer Science: Faculty Publications
We address the unsolved problem of unfolding prismatoids in a new context, viewing a “topless prismatoid” as a convex patch—a polyhedral subset of the surface of a convex polyhedron homeomorphic to a disk. We show that several natural strategies for unfolding a prismatoid can fail, but obtain a positive result for “petal unfolding” topless prismatoids. We also show that the natural extension to a convex patch consisting of a face of a polyhedron and all its incident faces, does not always have a nonoverlapping petal unfolding. However, we obtain a positive result by excluding the problematical patches. This then leads …
Source Unfoldings Of Convex Polyhedra Via Certain Closed Curves, Jin-Ichi Itoh, Joseph O'Rourke, Costin Vîlcu
Source Unfoldings Of Convex Polyhedra Via Certain Closed Curves, Jin-Ichi Itoh, Joseph O'Rourke, Costin Vîlcu
Computer Science: Faculty Publications
Abstract. We extend the notion of a source unfolding of a convex polyhedron P to be based on a closed polygonal curve Q in a particular class rather than based on a point. The class requires that Q “lives on a cone” to both sides; it includes simple, closed quasigeodesics. Cutting a particular subset of the cut locus of Q (in P) leads to a non-overlapping unfolding of the polyhedron. This gives a new general method to unfold the surface of any convex polyhedron to a simple, planar polygon
In Situ Synthesis Of Oligonucleotide Arrays On Surfaces Coated With Crosslinked Polymer Multilayers, Adam H. Broderick, Matthew R. Lockett, Maren E. Buck, Yuan Yuan, Lloyd M. Smith, David M. Lynn
In Situ Synthesis Of Oligonucleotide Arrays On Surfaces Coated With Crosslinked Polymer Multilayers, Adam H. Broderick, Matthew R. Lockett, Maren E. Buck, Yuan Yuan, Lloyd M. Smith, David M. Lynn
Chemistry: Faculty Publications
We report an approach to the in situ synthesis of oligonucleotide arrays on surfaces coated with crosslinked polymer multilayers. Our approach makes use of methods for the "reactive" layer-by-layer assembly of thin, amine-reactive multilayers using branched polyethyleneimine (PEI) and the azlactone-functionalized polymer poly(2-vinyl-4,4′-dimethylazlactone) (PVDMA). Postfabrication treatment of film-coated glass substrates with d-glucamine or 4-amino-1-butanol yielded hydroxyl-functionalized films suitable for the Maskless Array Synthesis (MAS) of oligonucleotide arrays. Glucamine-functionalized films yielded arrays of oligonucleotides with fluorescence intensities and signal-to-noise ratios (after hybridization with fluorescently labeled complementary strands) comparable to those of arrays fabricated on conventional silanized glass substrates. These arrays could …
Small-Network Approximations For Geometrically Frustrated Ising Systems, Bilin Zhuang, Courtney Lannert
Small-Network Approximations For Geometrically Frustrated Ising Systems, Bilin Zhuang, Courtney Lannert
Physics: Faculty Publications
The study of frustrated spin systems often requires time-consuming numerical simulations. As the simplest approach, the classical Ising model is often used to investigate the thermodynamic behavior of such systems. Exploiting the small correlation lengths in frustrated Ising systems, we develop a method for obtaining first approximations to the energetic properties of frustrated two-dimensional Ising systems using small networks of less than 30 spins. These small networks allow much faster numerical simulations, and more importantly, analytical evaluations of their properties are numerically tractable. We choose Ising systems on the triangular lattice, the kagome lattice, and the triangular kagome lattice as …
Response Of A Carbonate Platform To The Cenomanian-Turonian Drowning And Oae 2: A Case Study From The Adriatic Platform (Dalmatia, Croatia), Tvrtko Korbar, B. Glumac, Blanka Cvetko Tesovic, Sarah B. Cadieux
Response Of A Carbonate Platform To The Cenomanian-Turonian Drowning And Oae 2: A Case Study From The Adriatic Platform (Dalmatia, Croatia), Tvrtko Korbar, B. Glumac, Blanka Cvetko Tesovic, Sarah B. Cadieux
Geosciences: Faculty Publications
Global perturbations during the Cenomanian–Turonian boundary (CTB) interval and the Oceanic Anoxic Event 2 (OAE 2) represent one of the most extensively studied past environmental changes. To explore the response of various carbonate-platform depositional systems to such major environmental perturbations, strata of the intra-Tethyan Adriatic carbonate platform (sensu stricto) from the island of Bracˇ (Adriatic Sea, Croatia) provide excellent exposures and a previously well-established Upper Cretaceous lithostratigraphic framework. Within this context, this study integrated lithostratigraphy, biostratigraphy, and chemostratigraphy to describe a drowned-platform succession underlain and overlain by peritidal carbonates. Carbon-isotope stratigraphy of this succession revealed a shift towards positive d13C …
Outerplanar Graphs And Delaunay Triangulations, Ashraful Alam, Igor Rivin, Ileana Streinu
Outerplanar Graphs And Delaunay Triangulations, Ashraful Alam, Igor Rivin, Ileana Streinu
Computer Science: Faculty Publications
Dillencourt [1] showed that all maximal outerplanar graphs can be realized as Delaunay triangulations of points in convex position. In this note, we give two new, alternate proofs. © 2012 Springer-Verlag.
Geodetic Constraints On San Francisco Bay Area Fault Slip Rates And Potential Seismogenic Asperities On The Partially Creeping Hayward Fault, Eileen L. Evans, John P. Loveless, Brendan J. Meade
Geodetic Constraints On San Francisco Bay Area Fault Slip Rates And Potential Seismogenic Asperities On The Partially Creeping Hayward Fault, Eileen L. Evans, John P. Loveless, Brendan J. Meade
Geosciences: Faculty Publications
The Hayward fault in the San Francisco Bay Area (SFBA) is sometimes considered unusual among continental faults for exhibiting significant aseismic creep during the interseismic phase of the seismic cycle while also generating sufficient elastic strain to produce major earthquakes. Imaging the spatial variation in interseismic fault creep on the Hayward fault is complicated because of the interseismic strain accumulation associated with nearby faults in the SFBA, where the relative motion between the Pacific plate and the Sierra block is partitioned across closely spaced subparallel faults. To estimate spatially variable creep on the Hayward fault, we interpret geodetic observations with …