139 research outputs found
Observability analysis of power distribution systems with distributed energy resources using correlational measurements
No full textThesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019Cataloged from PDF version of thesis.Includes bibliographical references (pages 57-59).In this thesis, an observability analysis framework is proposed for power distribution systems. The framework analyzes the sufficiency of the available measurements for monitoring the system. In the areas of the network where sufficient sensors have been deployed, the complex voltage at the nodes may be estimated. The framework also provides a metric that quantifies the accuracy of these voltage estimates. Due to the cost of sensors and the size of distribution systems, it is frequently the case that the available measurements are insufficient for complete observability of the system. In this thesis, the author proposes the use of Correlational Measurements (CMs) for improving distribution system observability by leveraging correlation between loads and between Distributed Energy Resources (DERs). Load correlation due to class-residential, commercial, industrial, etc.- is captured via correlational load measurements, the first type of CM. Injection correlation of DERs-such as wind turbines located in proximity-is captured via correlational DER measurements, the second type of CM. This thesis presents the CM formulation and derives modified node voltage and branch current based state estimators (NVSE and BCSE) accommodating CMs. Additionally, this thesis contains an on-line parameter estimation scheme for CMs that improves the accuracy of state estimates over time. The observability analysis framework with CMs is demonstrated through simulations on the IEEE 123 Node Distribution Test Feeder. It is shown that the introduction of CMs leads to improved observability of the system with only a 0.7% decrease in state estimation accuracy for NVSE and a 0.5% increase in state estimation accuracy for BCSE.by Yohan M. John.S.M.S.M. Massachusetts Institute of Technology, Department of Mechanical Engineerin
My ministry with primary children Central Presbyterian Church Atlanta, Georgia September 1970 - April 1972, 1973
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Blue-colored dyes featuring a diketopyrrolopyrrole spacer for translucent dye-sensitized solar cells
No full textWe report the facile synthesis of blue-colored dyes featuring a diketopyrrolopyrrole (DPP) spacer with dimethylamine and bis(4-dibuotxylphenyl)-phenyl-amine as donor residues (CSD-08 and CSD-09), their spectroscopic, electrochemical and colorific properties, and their application to translucent dye-sensitized solar cells (DSSCs). In the DSSCs fabricated with 5 μm-thick TiO2 photoanodes, CSD-08 and CSD-09 yield power-conversion-efficiencies of 3.43% and 3.62%, respectively, under simulated one sun illumination.
IMP simulated mock community data set
No full text<p>This file contains the simulated mock (SM) metagenomic and metatranscriptomic dataset along with the original genomes used for simulation used within the article:</p>
<p><strong>IMP: a reproducible pipeline for reference-independent integrated metagenomic and metatranscriptomic analyses</strong></p>
<p>Shaman Narayanasamy<sup>†</sup>, Yohan Jarosz<sup>†</sup>, Emilie E.L. Muller, Cédric C. Laczny, Malte Herold, Anne Kaysen, Anna Heintz-Buschart, Nicolás Pinel, Patrick May, and Paul Wilmes<sup>*</sup></p>
<p>Preprint: http://biorxiv.org/content/early/2016/02/10/039263</p>
<p>The folder contains two subfolders (MG and MT), each containing the simulated metagenomic (MG) data and simulated metatranscriptomic (MT) data respectively. The files within these folders are in FASTQ format. The methods for generating these simulated data sets are described in the article.<br>
</p>
<p>The genomes and the resulting simulated metatranscriptomic data was generated and analysed within the article:</p>
<p><strong>Comparison of assembly algorithms for improving rate of metatranscriptomic functional annotation</strong></p>
<p>Albi Celaj, Janet Markle, Jayne Danska and John Parkinson; 2014; doi:10.1186/2049-2618-2-39</p>
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<p>It was provided upon request by the first author Albi Celaj, with permission to share the data. Please cite the aforementioned publication if this simulated metatranscriptomic data is used data is used.</p>
Efek Substitusi Akor Dan Tangga Nada Pentatonik Pada Mood Dalam Piano Jazz
No full textPenelitian ini berjudul "Efek Substitusi Akor Dan Tangga Nada Pentatonik Pada Mood Dalam Piano Jazz". Penelitian ini bertujuan untuk mengembangkan teknik improvisasi piano jazz dengan cara menggunakan substitusi akor dan tangga nada pentatonik sebagai bahan eksplorasi. Penggunaan substitusi akor sangat membantu dalam mengembangkan improvisasi sehingga dapat menambah nuansa baru. Penulis memilih lagu Are You Happy karya Yohan Kim untuk digunakan sebagai sarana eksplorasi yang representatif. Dalam menerapkan improvisasi tangga nada pentatonik, penulis menggunakan akor yang sudah disubstitusi sebagai acuan dan pondasi. Metode yang digunakan dalam penelitian ini adalah metode penelitian kualitatif dengan tahapan pengumpulan data yang terdiri dari observasi, studi dokumentasi, dan wawancara, kemudian analisis data yang didukung oleh metode eksplorasi dan penarikan kesimpulan. Dari proses penelitian dan penyajian yang sudah dilakukan, penulis menerapkan tangga nada pentatonik serta akor substitusi ke dalam improvisasi lagu Are You Happy karya Yohan Kim. Penulis berhasil menghadirkan ‘mood’ yang berbeda, unik dan baru dengan menerapkan improvisasi tangga nada pentatonik dan mensubstitusi akor improvisasi. Penerapan Tritone substitusi di akor ii dan V7 dalam improvisasi lagu tersebut bisa memberi pilihan tangga nada pentatonik dan bisa mengembangkan mood dalam berimprovisasi. Penerapan substitusi akor ke dalam improvisasi menggunakan tangga nada pentatonik dengan berbagai macam variasinya mampu menghasilkan mood yang berbeda.Kata kunci: Pentatonik, substitusi akor, improvisasi AbstractThis research is titled "The Effects of Chord Substitution and Pentatonic Scale on Mood in Jazz Piano." The aim of this study is to develop jazz piano improvisation techniques by using chord substitutions and the pentatonic scale as exploration materials. The use of chord substitution is highly beneficial in enhancing improvisation, adding new nuances to the music. The author chose the song "Are You Happy" by Yohan Kim as a representative tool for exploration. When applying pentatonic scale improvisation, the author used substituted chords as references and foundations.The research methodology employed in this study is qualitative research, involving data collection stages such as observation, documentary study, and interviews. Data analysis is supported by exploration methods and drawing conclusions. Through the research process and presentation, the author applied the pentatonic scale and chord substitutions to the improvisation of the song "Are You Happy" by Yohan Kim. The author successfully introduced a different, unique, and new mood by applying pentatonic scale improvisation and chord substitutions. The implementation of Tritone substitution in the ii and V7 chords in the improvisation of the song provides options for pentatonic scales and contributes to mood development in improvisation. The application of chord substitution in improvisation using the pentatonic scale, with its various variations, can generate different moodsKeywords: pentatonic, subtitution acord, improvisatio
Ultrafast fluxional exchange dynamics in electrolyte solvation sheath of lithium ion battery
No full textLithium cation is the charge carrier in lithium-ion battery. Electrolyte solution in lithium-ion battery is usually based on mixed solvents consisting of polar carbonates with different aliphatic chains. Despite various experimental evidences indicating that lithium ion forms a rigid and stable solvation sheath through electrostatic interactions with polar carbonates, both the lithium solvation structure and more importantly fluctuation dynamics and functional role of carbonate solvent molecules have not been fully elucidated yet with femtosecond vibrational spectroscopic methods. Here we investigate the ultrafast carbonate solvent exchange dynamics around lithium ions in electrolyte solutions with coherent two-dimensional infrared spectroscopy and find that the time constants of the formation and dissociation of lithium-ion center dot center dot center dot carbonate complex in solvation sheaths are on a picosecond timescale. We anticipate that such ultrafast microscopic fluxional processes in lithium-solvent complexes could provide an important clue to understanding macroscopic mobility of lithium cation in lithium-ion battery on a molecular level
ⓒ The Author(s) 2017112111sciescopu
Climate finance in the Asia-Pacific : trends and innovative approaches
No full textThis discussion paper 'Climate finance in the Asia-Pacific: Trends and Innovative Approaches' was prepared for ESCAP by Ilaria Carrozza, PhD Candidate, Department of International Relations, London School of Economics and Political Science, London, UK
The author would like to acknowledge ESCAP Environment and Development Division (Rae Kwon Chung, Aneta Nikolova, Riccardo Mesiano, Hala Razian, and with support from Yohan Hong). A peer review was conducted by Climate Policy Initiative (Mia Fitri and Leela Raina)
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