1,721,108 research outputs found
R Code and Output Supporting: Modeling individual variability in habitat selection and movement using integrated step-selection analyses
No full textSee the uploaded readme file.
Update 2025-04-25: Since initial publication, the mixedSSA R package referenced in this DRUM repository has been updated, and we have identified a mistake in one of the equations in the appendix. We have contacted the journal and submitted an erratum, and they have also requested that we update the associated supporting documents. Three files have been added to address this update (Update_delta_method.html, Update_delta_method.R, and helper_functions.R).This repository contains data and R code (along with associated output from running the code) supporting all results reported in: Chatterjee, Nilanjan; Wolfson, David; Kim, Dongmin; Vélez, Juliana; Freeman, Smith; Bacheler, Nathan; Shertzer, Kyle; Taylor, J.; Fieberg, John 2024. Modelling individual variability in habitat selection and movement using integrated step-selection analysis. Methods in Ecology and Evolution. The code demonstrates how to model the individual variation in habitat selection and movement parameters using integrated step-selection analysis.JF and NC were supported by National Aeronautics and Space Administration award 80NSSC21K1182 and JF received partial salary support from the Minnesota Agricultural Experimental Station.Chatterjee, Nilanjan; Wolfson, David; Kim, Dongmin; Velez, Juliana; Freeman, Smith; Bacheler, Nathan; Shertzer, Kyle; Taylor, Chris; Fieberg, John. (2024). R Code and Output Supporting: Modeling individual variability in habitat selection and movement using integrated step-selection analyses. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/27hq-zx30
New report of Calopodinae (Coleoptera, Oedemeridae) in South Korea, with description of a new species of the genus Sparedrus Dejean, 1821
No full textOedemeridae in Korea are represented by 25 species, all of which belong to the subfamily Oedemerinae Latreille, 1810. The other two subfamilies, Calopodinae Costa, 1852 and Polypriinae Lawrence, 2005, have not yet been documented in the region.We here report the first record of the subfamily Calopodinae in Korea with the discovery of Sparedrus koreanus sp. nov. This study provides external and genital photographs, a detailed description of the new species and a key to the Sparedrus species of East Asia
A new nano-accuracy AFM system for minimizing Abbe errors and the evaluation of its measuring uncertainty
No full textA new AFM system was designed for the establishment of a standard technique of nano-length measurement in a 2D plane. In a long range (about several tens of micrometers), measurement uncertainty is dominantly affected by the Abbe error of the XY scanning stage. No linear stage is perfectly straight; in other words, every scanning stage is subject to tilting, pitch and yaw motions. In this paper, an AFM system with minimum offsets of XY sensing is designed. Moreover, the XY scanning stage is designed to minimize the rotation angle, as Abbe errors occur through multiple combination of the offset and the rotation angle. To minimize the rotation angle, an optimal design is performed by maximizing the ratio of the stiffness of the parasitic direction to the motion direction of each stage. This paper describes a design scheme of a full AFM system, in particular, the XY scanner. The full range of a fabricated XY scanner is 100 put x 100 pm. The tilting, pitch and yaw motions are measured by an autocollimator to evaluate the performance of the XY stage. The results show that the AY scanner have a 0.75 arcsec parasitic rotation about the maximum range, thus the uncertainty in terms of the Abbe errors are very small relative to other standard equipment. Using this AFM system, a 3 mu m pitch specimen was measured. The measurement uncertainty of the total system was evaluated especially about pitch length. For a I D evaluation, Abbe errors are the most dominant factor, and the expanded combined uncertainty of the total system was evaluated especially about pitch length. For a I D evaluation, Abbe errors are the most dominant factor, and the expanded combined uncertainty (k = 2) of system was root(4.13)(2) + (5.07 x 10(-5) x p)(2) (nm). For a 2D evaluation, mirror non-orthogonality and Abbe errors are dominant factors, and expanded combined uncertainty (k = 2) of the system was root(4.13)(2) + (1.228 x 10(-4) x p)(2) in the X direction, and root(6 28)(2) + (1.266 x 10(-4) x p)(2) in the Y direction (the unit is nanometers), where p is the measured length in nm. (c) 2006 Elsevier B.V. All rights reserved
Highly Scalable (30 nm) and Ultra-low-energy (~5fJ/pulse) Vertical Sensing ECRAM with Ideal Synaptic Characteristics Using Ion-permeable Graphene Electrodes
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Development of Fuel Cell System Using Metal Hydride and Hydrogen Peroxide in Low-Oxygen Environments
No full textR code supporting: Detecting disease progression from animal movement using hidden Markov models
No full textZip file contains RMD code files and compiled HTML of analyses. See Readme file for more information. The graphical abstract thumbnail image is also included in the files.This repository contains R code supporting: Detecting disease progression from animal movement using hidden Markov models (HMMs). We provide a series of .Rmd files that can be compiled to form a transferable workflow for detecting infection from animal movement. We demonstrate the flexibility of (H)HMMs in capturing different disease scenarios and a workflow for appropriate model selection. Our approach has the potential to improve wildlife disease surveillance, inform management of vulnerable populations, and enhance understanding of disease dynamics.NSF INTERN grantSmithsonian Institution Fellowship Program (SIFP)Doctoral Dissertation FellowshipMinnesota Agricultural Experimental StationSahara Conservation and the Environment Agency - Abu DhabiKim, Dongmin; Michelot, Théo; Mertes, Katherine; Stabach, Jared A; Fieberg, John R. (2025). R code supporting: Detecting disease progression from animal movement using hidden Markov models. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/7ea0-6c10
A High Efficiency Low Noise RF-to-DC Converter Employing Gm-Boosting Envelope Detector and Offset Canceled Latch Comparator
Get PDFThis work presents a high efficiency RF-to-DC conversion circuit composed of an LC-CL balun-based Gm-boosting envelope detector, a low noise baseband amplifier, and an offset canceled latch comparator. It was designed to have high sensitivity with low power consumption for wake-up receiver (WuRx) applications. The proposed envelope detector is based on a fully integrated inductively degenerated common-source amplifier with a series gate inductor. The LC-CL balun circuit is merged with the core of the envelope detector by sharing the on-chip gate and source inductors. The proposed technique doubles the transconductance of the input transistor of the envelope detector without any extra power consumption because the gate and source voltage on the input transistor operates in a differential mode. This results in a higher RF-to-DC conversion gain. In order to improve the sensitivity of the wake-up radio, the DC offset of the latch comparator circuit is canceled by controlling the body bias voltage of a pair of differential input transistors through a binary-weighted current source cell. In addition, the hysteresis characteristic is implemented in order to avoid unstable operation by the large noise at the compared signal. The hysteresis window is programmable by changing the channel width of the latch transistor. The low noise baseband amplifier amplifies the output signal of the envelope detector and transfers it into the comparator circuit with low noise. For the 2.4 GHz WuRx, the proposed envelope detector with no external matching components shows the simulated conversion gain of about 16.79 V/V when the input power is around the sensitivity of −60 dBm, and this is 1.7 times higher than that of the conventional envelope detector with the same current and load. The proposed RF-to-DC conversion circuit (WuRx) achieves a sensitivity of about −65.4 dBm based on 45% to 55% duty, dissipating a power of 22 μW from a 1.2 V supply voltage
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
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
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