1,725,561 research outputs found
Data for "Identifying a critical micelle temperature in simulations of disordered asymmetric diblock copolymer melts"
No full textWith this data, one can plot all the figures given in the publication "Identifying a critical micelle temperature in simulations of disordered asymmetric diblock copolymer melts". An example simulation file is also given as a reference.We have used coarse-grained molecular dynamics simulations to identify a critical micelle temperature in a diblock copolymer melt by analyzing the appearance of micelles. The files contain the data and an example simulation file which can be used with Hoomd-blue version 2.9.0. The data has been published as "Identifying a critical micelle temperature in simulations of disordered asymmetric diblock copolymer melts" in Physical Review Materials.This work was supported primarily by NSF grant DMR-1719692. Most of the work was carried out using computational resources provided by the Minnesota Supercomputing Institute (MSI) at the University of Minnesota and part of this work used equipment supported by funding from the National Science Foundation through the UMN MRSEC under Award Number DMR-2011401.Chawla, Anshul; Bates, Frank S; Dorfman, Kevin D; Morse, David C. (2021). Data for "Identifying a critical micelle temperature in simulations of disordered asymmetric diblock copolymer melts". Retrieved from the University Digital Conservancy, https://doi.org/10.13020/rhjm-c008
SARAH-CONUS: Sub-weekly Area of Reservoirs from Analysis of Harmonized Landsat and Sentinel-2 data for Continental US
No full textThis dataset provides reservoir water-surface areas every 2–6 days for 1,904 reservoirs (>0.1 km²) across the conterminous United States from 1 January 2016 through 31 December 2023. Areas were extracted from NASA’s Harmonized Landsat–Sentinel-2 Surface Reflectance product (HLS v1.4; 30 m) with a Random-Forest water classifier, a cloud/ice-correction enhancement based on the Global Surface Water Occurrence layer, and LOWESS gap-filling. Validation against daily in-situ surveys for 240 reservoirs yields R² = 0.98 and median bias < 10 %. The product (nick-named SARAH-CONUS) closes the temporal gap between daily MODIS (coarse) and monthly Landsat (fine), enabling analyses of flood-mitigation releases, hydropower peaking, evaporation losses, and greenhouse-gas pulses at a management-relevant cadence
Book Review : Technical Territories: Data, Subjects, and Spaces in Infrastructural Asia, by Luke Munn.
Get PDFIn Technical Territories: Data, Subjects, and Spaces in Infrastructural Asia, Luke Munn explores how today’s territories are defined through data infrastructures, from undersea cables to cloud storage. Examining several cases studies in Asia, Anshul Rai Sharma finds this a groundbreaking interdisciplinary study of how these infrastructures underpin new forms of governance, shaping subjects and their everyday lives
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Collective excitations in layered materials with momentum-resolved electron energy loss spectroscopy
Get PDFStrong Coulomb interactions are either suspected or known to play a prominent role in material classes such as high temperature superconductors, charge density waves, and Mott insulators among many others. These interactions are quantified by the charge density response function, chi(q,w) (or the closely related inverse dielectric function). The measurement of the energy- and momentum-resolved chi(q,w) over a large phase space of q and w, however, presents a significant experimental challenge. Traditional methods to measure chi(q,w) have suffered from either one or more major drawbacks. To address this problem, the development of a spectroscopic technique, momentum-resolved electron energy loss spectroscopy (M-EELS), was undertaken. Because many of the material classes that exhibit these unusual ground states tend to be layered or quasi-two dimensional, M-EELS presents a promising approach to measuring the energy- and momentum-resolved charge density response. Since the technique is not widely used, however, the M-EELS results obtained as part of this thesis were compared to other probes in the relevant ranges of phase space to ensure consistency. Furthermore, a theoretical framework was worked out to demonstrate explicitly the relationship between the scattering cross section and c(q,w). M-EELS experiments were conducted on a high-temperature superconductor, Bi2Sr2CaCu2O8+d, a charge density wave material, TiSe2, and a topological insulator, Bi2Se3. It was determined that the bosonic origin of quasiparticle kinks often seen in angle-resolved photoemission studies can be identified using M-EELS. Lastly, the observation of a novel electronic collective mode in TiSe2 is presented as strong evidence for an excitonic insulator phase in this compound.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2017-12-01The student, Anshul Kogar, accepted the attached license on 2015-08-28 at 14:26.The student, Anshul Kogar, submitted this Dissertation for approval on 2015-08-28 at 14:40.This Dissertation was approved for publication on 2015-09-08 at 14:22.DSpace SAF Submission Ingestion Package generated from Vireo submission #8678 on 2016-03-08 at 11:05:02Made available in DSpace on 2016-03-08T17:21:39Z (GMT). No. of bitstreams: 2
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Android game development with AppInventor
Get PDFThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.Cataloged from PDF version of thesis.Includes bibliographical references (p. 94).AppInventor is an educational learning tool provided by MIT that allows users to build Android apps without any knowledge of programming. As AppInventor gains popularity amongst educators and students around the world, it will become increasingly important to ensure that the tool offers its users the breadth and depth of app-development functionality they desire. In anticipation of AppInventor's expanding role and influence in educational institutions worldwide (middle schools and high-schools, primarily), this thesis focuses on the age group of 3rd to 12th grade students, and on the topic that is of greatest interest to them: gaming, animation, and graphics. The aim of this thesis is to identify AppInventor's existing capabilities and limitations with respect to game development, and to implement ideas (both pedagogical and technological in nature) that will improve the diversity, complexity, aesthetic appeal, and performance of games that can be built using AppInventor. The author of this thesis believes that if AppInventor's game development capabilities can be augmented, the adoption rate of the tool and its popularity amongst school students will be impacted very positively. In this thesis, the author describes his personal experiences teaching AppInventor game development in India and USA, as well as the limitations (in teaching methodology and in AppInventor's feature set) that he identified through this experience. The author's primary contributions are the development of a hands-on curriculum for a 40-hour AppInventor Game Development course, and the implementation of several new features and components for AppInventor. The author will be traveling to China and India in Summer 2012 to test to what extent his creative curriculum and novel AppInventor modifications facilitate the development of games using AppInventor.by Anshul Bhagi.M.Eng
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Interactions between auditory and visual motion mechanisms and the role of attention: psychophysics and quantitative models
No full textThe human brain continuously receives sensory input from the dynamic physical world via various sensory modalities. In many cases, a single physical event generates simultaneous input to more than one modality. For example, a ball hitting the ground generates both visual and auditory input. The human brain has developed mechanisms to take advantage of the correlations between inputs to different modalities to form a uniform and stable percept. Recently, there has been a lot of research interest, psychophysical, neurophysiological and computational, to explore the mechanisms involved in crossmodal interactions in general and auditory-visual interactions in particular.
The current thesis makes three significant contributions to the field of auditory-visual interactions. First, I designed a comprehensive study to psychophysically examine the interactions between auditory and visual motion mechanisms for three different motion configurations: horizontal, vertical and motion-in-depth. I showed that simultaneous presentation of a strong motion signal in one modality influences perception of a weak motion signal in the other modality both when the weak motion in presented in the visual, as well as in the auditory modality. I further observed that crossmodal aftereffects were induced only when subjects adapted to spatial motion in the visual modality and not in the auditory modality. However, adaptation to auditory spectral motion did induce vertical visual motion aftereffects. To my knowledge, this is the first report of auditory-induced visual aftereffects. Second, I conducted psychophysical experiments to study the effects of spectral attention on the visual and the auditory motion mechanisms and showed that there are similar attentional effects on motion mechanisms within the two modalities. Third, I developed a neurophysiologically relevant computational model to provide a possible explanation for crossmodal interactions between the auditory and the visual motion mechanisms. In addition, I developed a model that can explain the observed experimental findings on the role of spectral attention in modulating motion aftereffects. The results obtained from both the model simulations agree very closely with the human behavioral data obtained from the experiments.Ph.D.Includes bibliographical references (p. 139-144)
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