Electrical and Electronics Commons^™

Accounting For The Local Field When Determining The Dielectric Loss Spectra Of Metals In The Region Of The Frequencies Of Volume, Surface And Localized Plasmon Oscillations, Tatiana Perova, Igor Shaganove, Kevin Berwick

Articles

The optical constant of bulk metal is used to determine the dispersion of the local field under one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) confinement. 3D confinement, expressed as ε mic 2 (ω3D), corresponds to the dielectric loss spectra of spherical particles with a diameter, d, much less than the wavelength of the beam used to measure the spectrum (d << λ). Excellent agreement with the results of Mie theory and experimental data for solid colloids within alkali halide crystals was observed. The function expressed as ε mic 2 (ω1D) allows the measurement of spectral micro-characteristics in the frequency range of the longitudinal collective motion of the free electrons. This corresponds to the spectrum of dielectric losses of bulk plasma oscillations. The function ε mic 2 (ω2D) describes the spectra of the dielectric losses of surface plasma oscillations in thin metal films. It is shown that the peak positions of ε mic 2 (ω3D), ε mic 2 (ω2D) and ε mic 2 (ω1D) spectra for simple metals, viz. alkali metals as well as Al, Be, Mg, Ga, In, Sn and Si, are in agreement with experimental results from electron-energy-loss spectroscopy and various optical techniques.

A Wide Frequency Scanning Printed Bruce Array Antenna With Bowtie And Semi-Circular Elements, Zeeshan Ahmed, Patrick Mcevoy, Max Ammann

Articles

A printed edge-fed counterpart of the wire Bruce array antenna, for frequency scanning applications, is presented in this paper. The unit-cell of the proposed antenna consists of bowtie and semi-circular elements to achieve wide bandwidth from below 22 GHz to above 38 GHz with open-stopband suppression. The open-stopband suppression enables a wide seamless scanning range from backward, through broadside, to forward endfire. A sidelobe threshold level of −10 dB is maintained to evaluate efficient scanning performance of the antenna. The antenna peak realized gain is 15.30 dBi, and, due to its compact size, has the ability to scan from −64° …

The Effect Of High Background And Dead Time Of An Ingaas/Inp Single-Photon Avalanche Photodiode On The Registration Of Microsecond Range Near-Infrared Luminescence, P. S. Parfenov, A. P. Litvin, D. A. Onishchuk, K. A. Gonchar, Kevin Berwick, A. V. Fedorov, A. V. Baranov

Articles

The effects of a high background count and a microsecond dead time interval on a gated InGaAs/InP single-photon avalanche photodiode (SPAD) during microsecond luminescence decay registration are discussed. It is shown that the background count rate of the SPAD limits its use for time-resolved and steady-spectral measurements, and that a “pile-up” effect appears in the microsecond range.

Corrections To ‘‘Glaciernet: A Deep-Learning Approach For Debris-Covered Glacier Mapping’’, Zhiyuan Xie, Umesh K. Haritashya, Vijayan K. Asari, Brennan W. Young, Michael P. Bishop, Jeffrey S. Kargel

Electrical and Computer Engineering Faculty Publications

In the above article [1], Figure 2 was incorrect. Unfortunately, we mixed the color label of "CONV $\to $ BN $\to $ ReLu" and "Unpooling" in the CNN structure section of Figure 2. The color label of "CONV $\to $ BN $\to $ ReLu" should be orange while the color label of "Unpooling" should be green. Also, the word "Decoder" is misspelled. That same figure with the same error is also used for the graphic abstract. The corrected figure is given here. None of the sections in the figure is modified. The only change is in the color label of …

การวิเคราะห์ค่าสนามไฟฟ้าของระบบสายส่งไฟฟ้ากระเเสสลับเเรงดัน 230 Kv ที่ใช้งานในพื้นที่จำกัด, ภาคภูมิ ขนุนก้อน

Chulalongkorn University Theses and Dissertations (Chula ETD)

วิทยานิพนธ์นี้วิเคราะห์ค่าสนามไฟฟ้าในระบบสายส่ง 230 kV ที่ใช้งานในพื้นที่จำกัดโดยใช้วิธีไฟไนต์เอลิเมนต์. วัตถุประสงค์ของวิทยานิพนธ์คือ การคำนวณค่าสนามไฟฟ้าบริเวณขอบเขตเดินระบบโครงข่ายไฟฟ้าแบบ 2 มิติ, เเบบ 3 มิติ, และวิธีเงาประจุ. การคำนวณค่าสนามไฟฟ้าสูงสุด 3 เฟสที่อุปกรณ์ไฟฟ้าแรงสูงได้แก่ วงแหวนเกลี่ยสนามไฟฟ้า, วงแหวนโคนา, และฉนวนพอลิเมอร์. การเปลี่ยนเเปลงค่าพารามิเตอร์ของวงเเหวนเกลี่ยสนามไฟฟ้าได้แก่ รัศมีท่อวงแหวน (r), รัศมีของแหวน (R), และ ระยะห่างจากรอยต่อสามทาง (H) ถูกนำมาใช้ปรับปรุงค่าสนามไฟฟ้าสูงสุด. สนามไฟฟ้าบริเวณขอบเขตเดินระบบโครงข่ายไฟฟ้ามีค่าประมาณ 0.7 kVrms/m ณ ความสูง 1 m จากพื้นดิน. ค่าสนามไฟฟ้าต่ำกว่าเกณฑ์ของ กฟผ. ซึ่งระบุไว้ที่ 2 kVrms/m. ผลการคำนวณค่าสนามไฟฟ้าแสดงให้เห็นว่าสนามไฟฟ้าสูงสุดเกิดขึ้นที่เฟส B. สนามไฟฟ้าสูงสุดที่วงแหวนเกลี่ยสนามไฟฟ้า, วงแหวนโคโรนา, เเละฉนวนมีค่าเท่ากับ 13 kVp/cm 12 kVp/cm, และ 3 kVp/cm ตามลำดับ. สนามไฟฟ้าดังกล่าวมีค่าต่ำกว่าสนามไฟฟ้าวิกฤตในอากาศที่ 21 kVp/cm บนผิวตัวนำไฟฟ้า และ 6.4 kVp/cm บนผิวฉนวน. ผลการหาค่าที่เหมาะสมของพารามิเตอร์ได้ค่า r, R, เเละ H เท่ากับ 35 mm, 180 mm, และ 0.43 m ตามลำดับ. ค่าสนามไฟฟ้าลดลง 40 % เมื่อได้พารามิเตอร์ที่เหมาะสม. อย่างไรก็ตาม วงแหวนเกลี่ยสนามไฟฟ้าถูกวางใกล้กับกราวด์มากขึ้น. ระยะอาร์คระหว่างไฟฟ้าแรงสูงถึงกราวด์จะสั้นลงไปด้วยเมื่อ H ที่เพิ่มขึ้น.

Quadrupoles For Remote Electrostimulation Incorporating Bipolar Cancellation, Shu Xiao, Ryo Yamada, Carol Zhou

Bioelectrics Publications

Introduction: A method that utilizes nanosecond bipolar cancellation (BPC) near a quadrupole electrodes to suppress a biological response but cancels the distal BPC at the quadrupole center, i.e., cancellation of cancellation (CANCAN), may allow for a remote focused stimulation at the quadrupole center.

Objectives: The primary object of this study was to outline the requirement of the CANCAN implementation and select an effective quadrupole configuration.

Results: We have studied three quadrupole electrode configurations, a rod quadrupole, a plate quadrupole (Plate-Q), and a resistor quadrupole. The pulse shapes of electric fields include monophasic pulses, cancellation pulses, and additive pulses. The Plate-Q …

Enhanced Charge Carrier Dynamics And Defects Passivation In Hybrid Perovskite Solar Cell Using A Novel Organic Halide Salt, Md Ashuqur Rahman Laskar

Electronic Theses and Dissertations

In the last few years, active research works on hybrid perovskite solar cells (HPSCs) have been going on throughout the world as a part of clean energy revolution. HPSCs have already proved their potentiality as future solar technology through their promising photovoltaic performances and ability for low temperature based solution processing. Nevertheless, still there are remaining challenges of better charge carrier dynamics and defects minimization in HPSCs. Overcoming these challenges are very important to achieve high power conversion efficiency (PCE) practically. Aiming this, a novel organic halide salt called Phenylhydrazinium Iodide (PHAI) is introduced as additive with CH₃NH …

Hybrid Rocket Engine Ignition And Control, Benjamin Letourneau, Trevor Blampied, Megan Johnson, Thomas Pham

Honors Theses and Capstones

Control of a hybrid rocket engine is dependent upon a robust system capable of executing commands at precise times. In order to accomplish this, hardware systems must be in place to control the flow of a pressurized gas and provide feedback to launch site personnel. Through the use of solenoid valves and wireless transceivers, control over the thrust of a rocket can be accomplished. In order to understand this information and provide a user-friendly interface to complete this, a launch control module is used. Through the combined capabilities of the two system it becomes possible to test and launch a …

Saperi: Approaching Gender Gap Using Spatial Ability Training Week In High-School Context, Maria Giulia Ballatore, Gavin Duffy, Sheryl Sorby, Anita Tabacco

Articles

Maria Giulia Ballatore, Gavin Duffy, Sheryl Sorby, and Anita Tabacco. 2020. SAperI: approaching gender gap using Spatial Ability training week in high-school context. In Eighth International Conference on Technological Ecosystems for Enhancing Multiculturality (TEEM’20), October 21–23, 2020, Salamanca, Spain. ACM, New York, NY, USA, 7 pages. https://doi.org/10.1145/3434780.3436577

Color Variation Of The Up-Conversion Luminescence In Er3+-Yb3+Co-Doped Lead Germanate Glasses And Microsphere Integrated Devices, Meng Zhang, Ke Tian, Shunbin Wang, Libo Yuan, Gerald Farrell, Elfed Lewis, Pengfei Wang

Articles

Abstract—Lead germanate glass samples co-doped with different Er3+/Yb3+ concentrations were prepared and the color variation of the up-conversion emissions in these glasses was observed using a 980 nm laser pump. A practical optical integrated device based on Er3+ -Yb3+ co-doped lead germanate glass microsphere and a special fiber structure, consisting of single mode fiber (SMF), multimode fiber (MMF) and a suspended tricore hollow fiber (STCHF) is described. As the pump light is coupled into the microsphere from the cores suspended inside the STCHF, the microsphere fixed in the air hole of the STCHF is excited and the up-conversion emissions are …

Crystal-Field Engineering Of Ultrabroadband Mid-Infrared Emission In Co2+-Doped Nano-Chalcogenide Glass Composites, Xiasong Lu, Runan Zhang, Yindong Zhang, Shaoqian Zhang, Jing Ren, Lukas Strizik, Thomas Wagner, Gerald Farrell, Pengfei Wang

Articles

unable and ultrabroadband mid-infrared (MIR) emissions in the range of 2.5–4.5 μm are firstly reported from Co2+-doped nano-chalcogenide (ChG) glass composites. The composites embedded with a variety of binary (ZnS, CdS, ZnSe) and ternary (ZnCdS, ZnSSe) ChG nanocrystals (NCs) can be readily obtained by a simple one-step thermal annealing method. They are highly transparent in the near- and mid-infrared wavelength region. Low-cost and commercially available Er3+-doped fiber lasers can be used as the excitation source. By crystal-field engineering of the embedded NCs through cation- or anion-substitution, the emission properties of Co2+ including its emission peak wavelength and bandwidth can be …

An Electrostatic Field Detector For Pulsed Power Safety, Bailey Gregory

Summer Community of Scholars Posters (RCEU and HCR Combined Programs)

No abstract provided.

The Missing Parameter In Renewable Energy Power Quality Analysis, I.E. The Coefficient Of Variation: Case Study Of A 3-Mw On-Site Wind Turbine Project In Ireland, Tony Kealy

Articles

Businesses are employing distributed generation techniques, such as wind turbines, to decarbonise their electrical energy supply by reducing their dependence on fossil-fuel-generated energy. This study investigates the effectiveness of a company making a €3,500,000 investment in a 3-MW on-site wind turbine to supply some or all of their factory electrical loads. The results should benefit the investing company and other potential investors by evaluating the economic, environmental, and social outcomes of the investment. A case study methodology was used. The study found that the payback period was six and a half years, and the turbine installation benefited the environment by …

Statistical Methods To Unravel Cortical Mechanism Of Perception And Response To Auditory Stimuli, Ladan Moheimanian

Legacy Theses & Dissertations (2009 - 2024)

Behavioral responses to auditory stimuli have a critical role in our daily activities. The perception of these stimuli and the generation of appropriate behavioral responses requires the interaction of thousands of neurons in the auditory-motor pathways in the brain. Despite their importance, still many neuroscientific questions about these interactions are remained to be answered. This may result from the limitations of brain recordings as well as statistical methods to analyze brain recordings. In this dissertation, I investigated underlying mechanisms that govern these neural interactions in the auditory-motor pathways using novel statistical techniques applied to the brain recordings from the surface …

Joint Estimation Of Multiple Granger Graphical Models Using Non-Convex Penalty Functions, Parinthorn Manomaisaowapak

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis considers joint learning of multiple sparse Granger graphical models to dis-cover underlying common and differential Granger causality (GC) structures across multiple time series. The proposed learning technique can be used in fMRI data analysis to infer a group-level brain network from a group of subjects or to uncover brain network differences among individuals with different brain conditions. By recognizing that the GC of a single mul-tivariate time series can be characterized by common zeros of vector autoregressive (VAR) lag coefficients, a group norm penalty is included in joint regularized least-squares estimations of multiple VAR models. Group-norm regularizations based …

Early Detection Of Asthma Via Enhanced Resolution Of Small Airways Using Ultra-Low Frequency Impulse Oscillometry, Christopher M. Aguilar

Open Access Theses & Dissertations

Examination of lung function for diagnosis and monitoring of diseases such as chronic obstructive pulmonary disease (COPD) and asthma can be performed with a variety of pulmonary function testing (PFT) techniques. The most commonly prescribed of these procedures are spirometry and whole-body plethysmography. However, these active participation tests depend on forced breathing maneuvers, may be physically exhausting, might not produce enough information, and are susceptible to being subject-dependent. In contrast, passive PFT approaches such as the forced oscillation technique (FOT) and the impulse oscillometry system (IOS) are increasingly being utilized for measuring lung mechanics because they require only minimal participation, …

Design, Construction, And Characterization Of A Combined Mini-Co₂/Voc Sensor And Gas Chromatograph For Field Research, Rishi Basdeo, Michael Hampton

Digital Repository: Showcase of Undergraduate Research Excellence

No abstract provided.

Opendrop Software Development, Jiajun Guan

Electrical Engineering

To be able to transfer and mix solutions more efficiently and accurately during biology experiments, the Electrical Engineering department at Cal Poly University is planning to purchase or engineer the OpenDrop device. The OpenDrop device uses electro-wetting technology to control the movement of small droplets of water on a planar electrode array to transport and mix different solutions. This device is an open-source project and could be purchased online through the GaudiLab. The basic code of the system could be found in GitHub. With this code as a reference, the goal of this senior project is to develop the firmware, …

Ev Charging Behavior Analysis Using Hybrid Intelligence For 5g Smart Grid, Yi Shen, Wei Fang, Feng Ye, Michel Kadoch

Electrical and Computer Engineering Faculty Publications

With the development of the Internet of Things (IoT) and the widespread use of electric vehicles (EV), vehicle-to-grid (V2G) has sparked considerable discussion as an energy-management technology. Due to the inherently high maneuverability of EVs, V2G systems must provide on-demand service for EVs. Therefore, in this work, we propose a hybrid computing architecture based on fog and cloud with applications in 5G-based V2G networks. This architecture allows the bi-directional flow of power and information between schedulable EVs and smart grids (SGs) to improve the quality of service and cost-effectiveness of energy service providers. However, it is very important to select …

Smart Inverters For Distributed Pv Network Management, Colin Charles Levis

Theses

Securing a sustainable decarbonised economy involves moving towards a decentralised power system with increasing penetration levels of distributed photovoltaics (PVs) within the low voltage distribution network (LVDN). Increasing penetration levels of PV systems pose challenges for maintaining grid voltage and frequency stability. Thus requires studies and simulations to estimate the needs and technical requirements to overcome the challenges and maximise the opportunities. These simulations require time-domain system models with a high dynamic resolution such as electromagnetic transient (EMT) simulations with small-time steps that capture the required performance with large numbers of network elements. However, the small-time step implies a high …

Glaciernet: A Deep-Learning Approach For Debris-Covered Glacier Mapping, Zhiyuan Xie, Umesh K. Haritashya, Vijayan K. Asari, Brennan W. Young, Michael P. Bishop, Jeffrey S. Kargel

Electrical and Computer Engineering Faculty Publications

Rising global temperatures over the past decades is directly affecting glacier dynamics. To understand glacier fluctuations and document regional glacier-state trends, glacier-boundary detection is necessary. Debris-covered glacier (DCG) mapping, however, is notoriously difficult using conventional geospatial technology methods. Therefore, in this research for automated DCG mapping, we evaluate the utility of a convolutional neural network (CNN), which is a deep learning feed-forward neural network. The CNN inputs include Landsat satellite images, an Advanced Land Observation Satellite (ALOS) digital elevation model (DEM) and DEM-derived land-surface parameters. Our CNN based deep-learning approach named GlacierNet was designed by appropriately choosing the type, number …

Mitosisnet: End-To-End Mitotic Cell Detection By Multi-Task Learning, Md Zahangir Alom, Theus Aspiras, Tarek M. Taha, Tj Bowen, Vijayan K. Asari

Electrical and Computer Engineering Faculty Publications

Mitotic cell detection is one of the challenging problems in the field of computational pathology. Currently, mitotic cell detection and counting are one of the strongest prognostic markers for breast cancer diagnosis. The clinical visual inspection on histology slides is tedious, error prone, and time consuming for the pathologist. Thus, automatic mitotic cell detection approaches are highly demanded in clinical practice. In this paper, we propose an end-to-end multi-task learning system for mitosis detection from pathological images which is named"MitosisNet". MitosisNet consist of segmentation, detection, and classification models where the segmentation, and detection models are used for mitosis reference region …

การวางตำแหน่งที่เหมาะที่สุดของตัวขยายแสงเอสโอเอสำหรับการเชื่อมต่อระหว่างศูนย์ข้อมูลอีเทอร์เน็ต 100 กิกะบิต, พิชชากรณ์ สวัสดี

Chulalongkorn University Theses and Dissertations (Chula ETD)

วิทยานิพนธ์ฉบับนี้นำเสนอการวางตำแหน่งที่เหมาะสมของตัวขยายแสงเอสโอเอเพื่อขยายระยะทางของการสื่อสารทางแสงในการเชื่อมต่อโครงข่ายศูนย์ข้อมูล 100 กิกะบิต โดยใช้ดับเบิ้ลยูดีเอ็ม 4 ช่องสัญญาณในช่วงความยาวคลื่นในแถบความถี่โอ (1295 nm, 1300 nm, 1305 nm, และ 1310 nm) ด้วยอัตราการส่งข้อมูลช่องสัญญาณละ 25.78125 กิกะบิตต่อวินาทีตามมาตรฐาน 100GBASE-LR4 คุณภาพสัญญาณภายหลังการแทรกตัวขยายแสงเอสโอเอจะได้รับผลกระทบจาก (1) การเสื่อมโอเอสเอ็นอาร์เมื่อกำลังขาเข้าตัวขยายแสงเอสโอเอมีค่าต่ำ, (2) ผลกระทบรูปแบบบิตเมื่อกำลังขาเข้าตัวขยายแสงเอสโอเอมีค่าสูง, และ (3) เอ็กซ์จีเอ็มเมื่อใช้ขยายหลายช่องดับเบิ้ลยูดีเอ็ม เพื่อระบุการวางตำแหน่งที่เหมาะสมของตัวขยายแสงเอสโอเอ วิทยานิพนธ์ฉบับนี้ได้ประเมินคุณภาพสัญญาณจากแผนภาพรูปตาและรูปคลื่นของสัญญาณแสงรวมทั้งกราฟอัตราความผิดพลาดบิตและกราฟช่วงไดนามิก ซึ่งวัดจากการทดลองสองชุดคือ (1) ชุดแรกใช้อุปกรณ์วิจัยเพื่อเปรียบเทียบผลการทดลองกับการคำนวณผ่านโปรแกรม MATLAB ได้ และ (2) ชุดสองใช้อุปกรณ์เชิงพาณิชย์เพื่อบ่งบอกความรุนแรงของผลกระทบทั้งสามในลิงก์ดับเบิ้ลยูดีเอ็มที่ใช้จริง ผลการทดลองชุดแรกสรุปได้ว่า (1) ผลการทดลองใกล้เคียงกับผลการคำนวณอัตราความผิดพลาดบิตภายใต้ผลกระทบหลักของการเสื่อมโอเอสเอ็นอาร์ (2) ผลกระทบรูปแบบบิตไม่สามารถถูกคำนวณได้เนื่องจากเป็นผลกระทบแบบไม่เชิงเส้น โดยขึ้นอยู่กับเวลาฟื้นฟูของตัวขยายแสงเอสโอเอและลำดับไบนารี่การสุ่มแบบเทียมที่ใช้งาน, และ (3) การวางตำแหน่งที่เหมาะของตัวขยายแสงเอสโอเอคือ 40 กิโลเมตรจากภาคส่ง อีกทั้งผลการทดลองชุดสองสรุปได้ดังนี้ผลกระทบทั้งสามก่อให้เกิดโทษกำลังที่ต่างกันในการส่งข้อมูลอย่างไรก็ตามการวางตำแหน่งที่เหมาะสมของตัวขยายแสงเอสโอเอในการทดลองนี้คือระยะทาง 40 กิโลเมตรเช่นเดียวกับการทดลองแรก ท้ายสุดเมื่อส่งข้อมูลทั้งสี่ช่องสัญญาณผ่านเส้นใยแก้วนำแสงระยะทางดังกล่าวและตัวขยายแสงเอสโอเอ พบว่าอัตราความผิดพลาดบิตมีค่าต่ำกว่า 10-12 พิสูจน์การรับส่งข้อมูลตามมาตรฐาน 100GBASE-LR4 ได้

Resource Ecologies, Political Economies And The Ethics Of Audio Technologies In The Anthropocene, Eliot Bates

Publications and Research

Understanding how recorded and amplified stage musics contribute towards producing the Anthropocene necessitates attending to complex transnational flows of material, capital and labor, and how they coalesce into technological objects. This is complicated by the wide array of sites, practices and knowledges involved during various stages of the production process, from initial resource extraction, to smelting, component manufacturing, technology assembly, and distribution. To develop a suitable technological ethics, and to understand what happens to environments and to human, animal and plant lifeworlds, requires one to resist abstraction and undertake a global accounting of resource ecologies with recourse to planetary-scale political …

Sensor Fusion And Non-Linear Mpc Controller Development Studies For Intelligent Autonomous Vehicular Systems, Ahammad Basha Dudekula

Dissertations, Master's Theses and Master's Reports

The demand for safety and fuel efficiency on ground vehicles and advancement in embedded systems created the opportunity to develop Autonomous controller. The present thesis work is three fold and it encompasses all elements that are required to prototype the autonomous intelligent system including simulation, state handling and real time implementation. The Autonomous vehicle operation is mainly dependent upon accurate state estimation and thus a major concern of implementing the autonomous navigation is obtaining robust and accurate data from sensors. This is especially true, in case of Inertial Measurement Unit (IMU) sensor data. The IMU consists of a 3-axis gyro, …

Multi-Modal Natural Frequency Response Of Utility Transmission Tapered Wood Poles Under Various Soil Foundation Conditions: Natural Frequency Response Under Various Soil Conditions, Ramani Ayakannu, Zia Razzaq

Civil & Environmental Engineering Faculty Publications

Studied herein is the multi-modal natural frequency response of utility transmission tapered wood poles under various soil foundation conditions. Strong winds and hurricanes in various parts of the world have resulted in collapse of such utility poles and have resulted in the disruption of electrical distribution systems in addition to creating hazardous conditions for the public. To avoid the development of resonance under such dynamic loading, the multi-modal natural vibration of the utility poles first needs to be understood in the presence of practical soil foundation conditions. To capture the soil-structure interaction effects on the multi-modal frequencies, a SAP2000 dynamic …

Recent Developments In The Pyscf Program Package, Qiming Sun, Xing Zhang, Samragni Banerjee, Peng Bao, Marc Barbry, Nick S. Blunt, Nikolay A. Bogdanov, George H. Booth, Jia Chen, Zhi-Hao Cui, Janus J. Eriksen, Yang Gao, Sheng Gun, Jan Hermann, Matthew R. Hermes, Kevin Koh, Peter Koval, Susi Lehtola, Zhendong Li, Junzi Liu, Narbe Mardirossian, James D. Mcclain, Mario Motta, Bastien Mussard, Hung Q. Pham, Artem Pulkin, Wirawan Purwanto, Paul J. Robinson, Enrico Ronca, Elvira R. Sayfutyarova, Maximillian Scheurer, Henry F. Schurkus, James E.T. Smith, Chong Sun, Shi-Ning Sun, Shiv Upadhyay, Lucas K. Wagner, Xiao Wang, Alec White, James Daniel Whitfield, Mark J. Williamson, Sebastian Wouters, Jun Yang, Jason M. Yu, Tianyu Zhu, Timothy C. Berkelbach, Sandeep Sharma, Alexander Yu Sokolov, Garnet Kin-Lic Chan

University Administration Publications

PySCF is a Python-based general-purpose electronic structure platform that supports first-principles simulations of molecules and solids as well as accelerates the development of new methodology and complex computational workflows. This paper explains the design and philosophy behind PySCF that enables it to meet these twin objectives. With several case studies, we show how users can easily implement their own methods using PySCF as a development environment. We then summarize the capabilities of PySCF for molecular and solid-state simulations. Finally, we describe the growing ecosystem of projects that use PySCF across the domains of quantum chemistry, materials science, machine learning, and …

Developing A Uas-Deployable Methane Sensor Using Low-Cost Modular Open-Source Components, Gavin Demali

Williams Honors College, Honors Research Projects

This project aimed to develop a methane sensor for deployment on an unmanned aerial system (UAS), or drone, platform. This design is centered around low cost, commercially available modular hardware components and open source software libraries. Once successfully developed, this system was deployed at the Bath Nature Preserve in Bath Township, Summit County Ohio in order to detect any potential on site fugitive methane emissions in the vicinity of the oil and gas infrastructure present. The deliverables of this project (i.e. the data collected at BNP) will be given to the land managers there to better inform future management and …

Development And Characterization Of Perovskite Solar Cells For Tandem Device Configuration, Angel Moiseis De La Rosa

Open Access Theses & Dissertations

Photovoltaic devices based on perovskite materials are constantly progressing towards more applicability in large-area panels. In order for perovskite-based photovoltaics to reach reliable and stable commercialization, common issues with the use of perovskite still need to be resolved, including the need to identify fabrication processes that can yield optimal material parameters for better photovoltaic performance. Defining an optimal fabrication process requires that researchers and manufacturers alike come to an agreement regarding perovskite characteristics that result from device operation and material processing. This work focuses on characterizing physical, electrical, and electronic properties of a FAxCs1-xPb(IyBr1-y)3 perovskite, and how some of these …

Development Of The Payload System And Obc Microcontroller Coding For A Cubic Satellite Performing An Additive Self-Repair Experiment In Space, Eduardo Macias-Zugasti

Open Access Theses & Dissertations

Additive manufacturing, which is also known as three-dimensional printing, in space is one of the most promising technologies advancing current capabilities for in-orbit space manufacturing and assembly. Additive manufacturing contributes to the reduction of cost per kilogram and number of launches, thus facilitating extraterrestrial colonization and deep-space exploration. The state of the art includes advancing efforts inside the International Space Station (ISS). However, the ISS is a controlled environment and, to the best of our knowledge, no spacecraft or satellite has performed additive manufacturing tasks in the extreme environment of outer space. In this work a 1U CubeSat named Orbital …