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Rsif Burkina Faso Country Report 2023 - English, Regional Scholarship And Innovation Fund (Rsif) Dec 2023

Rsif Burkina Faso Country Report 2023 - English, Regional Scholarship And Innovation Fund (Rsif)

Rsif Country Progress Reports

The rationale for Rsif is that Africa requires world class scientists in priority thematic disciplines that are relevant to national economic growth. Highly skilled human capital will advance implementation of Burkina Faso’s sustainable and inclusive development. Burkina Faso is one of the nine African countries that is contributing to the Regional Scholarship and Innovation Fund (Rsif) of the Partnership for skills in Applied Sciences, Engineering and Technology (PASET) since 2020. Its contribution of USD 2 million is through the World Bank supported Africa Centres of Excellence for Higher Education for Development Impact (ACE Impact) project and is to train Burkinabè …

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The Digital Engine Model: Generating Leads Through The Application Of Dcm And Inbound Marketing, Kyle A. Huggins, John D. Hansen Dec 2023

The Digital Engine Model: Generating Leads Through The Application Of Dcm And Inbound Marketing, Kyle A. Huggins, John D. Hansen

Journal of Applied Marketing Theory

Digital Content Marketing (DCM) has become a primary tool for marketers in driving lead generation in today’s digital marketing world. Leading brands are creating and curating content trying to build brand equity and trust, connecting content to consumer action through brand story. And while strong theoretical models of content marketing have been discussed in the marketing literature, like Hollebeek and Macky (2019), there is a dearth of understanding about the application and direct impact of organic digital content strategies on marketing directives. This paper investigates an applied model, called The Digital Engine, which provides instruction on proper inbound marketing techniques …

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Supporting Software Engineers With Large Language Model-Based Automation, Ting Zhang Dec 2023

Supporting Software Engineers With Large Language Model-Based Automation, Ting Zhang

Dissertations and Theses Collection (Open Access)

In recent years, software engineering (SE) has witnessed significant growth, leading to the creation and sharing of an abundance of software artifacts such as source code, bug reports, and pull requests. Analyzing these artifacts is crucial for comprehending the sentiments of software developers and automating various SE tasks, ultimately leading to more human-centered automated SE and enhancing software development efficiency. However, the diverse and unstructured nature of software text poses a significant challenge to this analysis. In response, researchers have investigated a variety of approaches, including the utilization of natural language processing techniques. The advent of large language models (LLMs), …

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Towards Securing Smart Contracts Systematically, Duy Tai Nguyen Dec 2023

Towards Securing Smart Contracts Systematically, Duy Tai Nguyen

Dissertations and Theses Collection (Open Access)

Smart contracts are a groundbreaking technique that allows users to programmatically modify the state of the blockchain. They are essentially self-enforcing programs that are deployed and executed on top of the blockchain. In recent years, we have witnessed various smart contract incidents that led to substantial financial losses and even business closures. These incidents mainly arise from design flaws in Solidity, a dominant programming language for writing smart contracts, which complicates the process of detecting and repairing vulnerabilities. Furthermore, there is a growing interest in attacking smart contracts by the attackers. This thesis is dedicated to developing effective methods to …

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Technical Maturity And Network Effects Of Xf Artificial Intelligence Open Platform, Tao Jiang Dec 2023

Technical Maturity And Network Effects Of Xf Artificial Intelligence Open Platform, Tao Jiang

Dissertations and Theses Collection (Open Access)

Studying the impact mechanism of the commercial value of artificial intelligence open technology platforms has theoretical and practical significance. This article aims to enrich and expand the theoretical research on technology maturity, value co creation, and network effects on open technology platforms at home and abroad through empirical research on artificial intelligence open technology platforms and ecology. This study takes XF's open technology platform case as the research object, and based on technology maturity theory, value co creation, and network effects theory, examines the network effect value creation mechanism of open technology platforms driven by technology maturity in three development …

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An Optimized Search For Dark Matter In The Galactic Halo With Hawc, A. Albert, R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, E. Belmont-Moreno, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, E. De La Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. Duvernois, M. Durocher, J. C. Diaz-Velez, C. Espinoza, M. M. Gonzalez, J. A. Goodman, J. P. Harding, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, V. Joshi, G. J. Kunde, J. Lee, H. Leon Vargas, J. T. Linneman, A. L. Longinotti, G. Luis-Raya, J. Lundeen, K. Malone, O. Martinez, J. Martinez-Castro, J. A. Matthews, E. Moreno, M. Mostafa, A. Nayerhoda, L. Nellen, A. Peisker, E. G. Perez-Perez, C. D. Rho, D. Rosa-Gonzalez, H. Salazar, D. Salazar-Gallegos, A. Sandoval, J. Serna-Franco, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Urena-Mena, L. Villasenor, Xiaojie Wang, H. Zhou, C. De Leon Dec 2023

An Optimized Search For Dark Matter In The Galactic Halo With Hawc, A. Albert, R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, E. Belmont-Moreno, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, E. De La Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. Duvernois, M. Durocher, J. C. Diaz-Velez, C. Espinoza, M. M. Gonzalez, J. A. Goodman, J. P. Harding, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, V. Joshi, G. J. Kunde, J. Lee, H. Leon Vargas, J. T. Linneman, A. L. Longinotti, G. Luis-Raya, J. Lundeen, K. Malone, O. Martinez, J. Martinez-Castro, J. A. Matthews, E. Moreno, M. Mostafa, A. Nayerhoda, L. Nellen, A. Peisker, E. G. Perez-Perez, C. D. Rho, D. Rosa-Gonzalez, H. Salazar, D. Salazar-Gallegos, A. Sandoval, J. Serna-Franco, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Urena-Mena, L. Villasenor, Xiaojie Wang, H. Zhou, C. De Leon

Physics Faculty Research & Creative Works

The Galactic Halo is a key target for indirect dark matter detection. The High-Altitude Water Cherenkov (HAWC) observatory is a high-energy (∼300 GeV to >100 TeV) gamma-ray detector located in central Mexico. HAWC operates via the water Cherenkov technique and has both a wide field of view of ∼ 2 sr and a >95% duty cycle, making it ideal for analyses of highly extended sources. We made use of these properties of HAWC, and a new background-estimation technique optimized for extended sources to probe a large region of the Galactic Halo for dark matter signals. With this approach, we set …

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Neural Airport Ground Handling, Yaoxin Wu, Jianan Zhou, Yunwen Xia, Xianli Zhang, Zhiguang Cao, Jie Zhang Dec 2023

Neural Airport Ground Handling, Yaoxin Wu, Jianan Zhou, Yunwen Xia, Xianli Zhang, Zhiguang Cao, Jie Zhang

Research Collection School Of Computing and Information Systems

Airport ground handling (AGH) offers necessary operations to flights during their turnarounds and is of great importance to the efficiency of airport management and the economics of aviation. Such a problem involves the interplay among the operations that leads to NP-hard problems with complex constraints. Hence, existing methods for AGH are usually designed with massive domain knowledge but still fail to yield high-quality solutions efficiently. In this paper, we aim to enhance the solution quality and computation efficiency for solving AGH. Particularly, we first model AGH as a multiple-fleet vehicle routing problem (VRP) with miscellaneous constraints including precedence, time windows, …

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Autophagic Reprogramming Of Bone Marrow–Derived Macrophages, Mayada Mazher, Yomna Adel Moqidem, Ahmed Abdellatif, Ahmed A. Sayed Dec 2023

Autophagic Reprogramming Of Bone Marrow–Derived Macrophages, Mayada Mazher, Yomna Adel Moqidem, Ahmed Abdellatif, Ahmed A. Sayed

Faculty Journal Articles

Macro-autophagy is a highly conserved catabolic process among eukaryotes affecting macrophages. This work studies the genetic regulatory network involving the interplay between autophagy and macrophage polarization (activation). Autophagy-related genes (Atgs) and differentially expressed genes (DEGs) of macrophage polarization (M1-M2) were predicted, and their regulatory networks constructed. Naïve (M0) mouse bone marrow-derived monocytes were differentiated into M1 and M2a. Validation of the targets of Smad1, LC3A and LC3B, Atg16L1, Atg7, IL-6, CD68, Arg-1, and Vamp7 was performed in vitro. Immunophenotyping by flow cytometry revealed three macrophage phenotypes: M0 (IL-6 + /CD68 +), M1 (IL-6 + /CD68 + /Arg-1 +), and M2a …

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Restricted Nonlinear Scales Of Turbulent Secondary Flows Over Spanwise Heterogeneous Roughness, Benjamin A. Minnick, Xiaowei Zhu, Dennice F. Gayme Dec 2023

Restricted Nonlinear Scales Of Turbulent Secondary Flows Over Spanwise Heterogeneous Roughness, Benjamin A. Minnick, Xiaowei Zhu, Dennice F. Gayme

Mechanical and Materials Engineering Faculty Publications and Presentations

Recent studies, e.g., Wangsawijaya et al. (2020) have revealed the prevalence of streak meandering in turbulent flow over spanwise heterogeneous roughness. Here we exploit the scale decomposition inherent in the Restricted Nonlinear (RNL) modeling approach to further investigate this behavior. The RNL decomposition comprises a large-scale streamwise averaged mean with small-scale fluctuations about that mean defined through a dynamical restriction that leads to computational tractability. The simplified setting facilitates the study of secondary flow interacting with the large-scale streak via one-way coupling, thus enabling additional insight into relevant interaction mechanisms. In agreement with the experimental work, our results indicate that …

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Real-Time Analysis Of Aerosol Size Distributions With The Fast Integrated Mobility Spectrometer (Fims), Daisy Wang Dec 2023

Real-Time Analysis Of Aerosol Size Distributions With The Fast Integrated Mobility Spectrometer (Fims), Daisy Wang

McKelvey School of Engineering Graduate Student Theses & Dissertations

The Fast Integrated Mobility Spectrometer (FIMS) has emerged as an innovative instrument in the aerosol science domain. It employs a spatially varying electric field to separate charged aerosol particles by their electrical mobilities. These separated particles are then enlarged through vapor condensation and imaged in real time by a high-speed CCD camera. FIMS achieves near 100% detection efficiency for particles ranging from 10 nm to 600 nm with a temporal resolution of one second. However, FIMS’ real-time capabilities are limited by an offline data analysis process. Deferring analysis until hours or days after measurement makes FIMS' capabilities less valuable for …

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Enhanced Fabrication Of Microdroplet Generator Nozzle Arrays: Optimizing Koh Etching For Microfluidic Applications, Hongyu Bai Dec 2023

Enhanced Fabrication Of Microdroplet Generator Nozzle Arrays: Optimizing Koh Etching For Microfluidic Applications, Hongyu Bai

McKelvey School of Engineering Graduate Student Theses & Dissertations

Ultrasonic microdroplet generators are useful devices with broad applications ranging from aerosolized drug delivery to three-dimensional (3D) printing-based additive manufacturing. One such technology comprises a microfabricated array of nozzles with droplet production driven by a piezoelectric transducer. The present study focuses on refining a critical fabrication step, anisotropic wet etching of pyramidal nozzles using a basic potassium hydroxide (KOH) solution. Given the integral role of nozzle geometry in device operation, high-precision techniques including Reactive Ion Etching (RIE), Deep Reactive Ion Etching (DRIE), and KOH wet etching were employed. A tapering geometry is preferred for acoustic wave focusing and efficient droplet …

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Pathways To Success: A Career Insights Event For Youth And Parents, Kendall Perez Dec 2023

Pathways To Success: A Career Insights Event For Youth And Parents, Kendall Perez

Capstone Projects and Master's Theses

Partners for Peace (P4P) is a nonprofit organization in Monterey County focused on enhancing parent-child relationships by offering parent education classes and a youth mentorship program. They serve over 432,000 Monterey County residents, composed of a diverse demographic with a predominantly Hispanic population. The young adults in Monterey County face challenges in transitioning to independent adulthood and achieving self-sufficiency. The contributing factors include underfunded educational systems, low educational attainment, and low financial literacy among youth, undoubtedly resulting in ungainful employment, mental illness, and dependence. P4P's "Pathways to Success" career exploration fair endeavors to boost career awareness and confidence among youth …

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Impact Of Technology On K-8 Students' Learning Post-Covid-19, Vincent Rodriguez Dec 2023

Impact Of Technology On K-8 Students' Learning Post-Covid-19, Vincent Rodriguez

Capstone Projects and Master's Theses

This research project aims to examine the impact of technology on K-8 students' learning post-COVID-19 and how technology in the classroom helps students achieve academic success. With the difficulties that the COVID-19 pandemic had on students, this study will dive deep into the depths of technology's use in today's education system. Through the use of a literature review, interviews with teachers, and surveys from 7th & 8th-grade students, the findings indicated that technology plays a crucial role in students learning and teaching. We are moving away from the traditional classroom of books and paper and into a new era of …

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Self-Regulation In A Preschool Classroom, Karen Ruby Vasquez Dec 2023

Self-Regulation In A Preschool Classroom, Karen Ruby Vasquez

Capstone Projects and Master's Theses

This capstone project focuses on preschool aged children’s development of self regulation. Self-regulation involves children's developing ability to regulate their emotions, thoughts and behavior to enable them to act in positive ways toward a goal. Young children have a harder time with self regulation than older children. Working in a preschool made me learn that some children have a harder time controlling their emotions and behaviors than others. It is important to address this because good early self-regulation is associated with later positive developmental outcomes. “Supporting self regulation development in early childhood is an investment in later success, because stronger …

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Evaluating Differences In Optical Properties Of Indolent And Aggressive Murine Breast Tumors Using Quantitative Diffuse Reflectance Spectroscopy, Joel Rodriguez Troncoso, Umme Marium Mim, Jesse D. Ivers, Santosh K. Paidi, Mason G. Harper, Khue G. Nguyen, Sruthi Ravindranathan, Lisa Rebello, David E. Lee, David A. Zaharoff, Ishan Barman, Narasimhan Rajaram Dec 2023

Evaluating Differences In Optical Properties Of Indolent And Aggressive Murine Breast Tumors Using Quantitative Diffuse Reflectance Spectroscopy, Joel Rodriguez Troncoso, Umme Marium Mim, Jesse D. Ivers, Santosh K. Paidi, Mason G. Harper, Khue G. Nguyen, Sruthi Ravindranathan, Lisa Rebello, David E. Lee, David A. Zaharoff, Ishan Barman, Narasimhan Rajaram

Biomedical Engineering Faculty Publications and Presentations

We used diffuse reflectance spectroscopy to quantify tissue absorption and scattering-based parameters in similarly sized tumors derived from a panel of four isogenic murine breast cancer cell lines (4T1, 4T07, 168FARN, 67NR) that are each capable of accomplishing different steps of the invasion-metastasis cascade. We found lower tissue scattering, increased hemoglobin concentration, and lower vascular oxygenation in indolent 67NR tumors incapable of metastasis compared with aggressive 4T1 tumors capable of metastasis. Supervised learning statistical approaches were able to accurately differentiate between tumor groups and classify tumors according to their ability to accomplish each step of the invasion-metastasis cascade. We investigated …

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“Safe People And Safe Spaces:” Filipino American Identity Formation In Response To Local Social Contexts, Cilka Mayumi Hijara Dec 2023

“Safe People And Safe Spaces:” Filipino American Identity Formation In Response To Local Social Contexts, Cilka Mayumi Hijara

Arts & Sciences Graduate Student Theses and Dissertations

The identity formation of Filipino Americans has captured scholarly interest due to their unique characteristics and identity attachments. Studies of children of Filipino immigrants are largely focused on individuals from diverse areas and do not explore whether different social environments influence a diversity of identity perspectives. Using data from interviews with 40 children of Filipino immigrants from across the U.S., I examine whether and how their understandings of their identities are shaped by setting. I find that participants’ local contexts, particularly local racial/ethnic demographics during childhood, shape their perceptions of their identities relative to other groups and prevailing categorization schemes. …

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Benefits Of Existing Educational Programs For Migrant Elementary School Students, Jasmin Rodriguez Dec 2023

Benefits Of Existing Educational Programs For Migrant Elementary School Students, Jasmin Rodriguez

Capstone Projects and Master's Theses

Due to the constant mobility of migrant families, migrant students face disadvantages in their academic performance. This senior capstone research project is to examine the benefits of existing education programs for immigrant elementary school students on migrant students available for a largely Hispanic community on the Central Coast of California. Through the use of literature review, interviews with migrant teachers, migrant coordinators, and migrant directors, the results show that even though migrant students obtain physical and emotional support for the Migrant Education Program, their academic achievement and personal identity are constantly being challenged. In order to help mitigate these effects, …

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Numerical Investigation Of Physical Parameters In Cardiac Vessels As A New Medical Support Science For Complex Blood Flow Characteristics, Defrianto, Toto Saktioto, Yan Soerbakti, Andika Thoibah, Bunga Meyzia, Romi Fadli Syahputra, Okfalisa, Syamsudhuha, Dedi Irawan, Haryana Hairi Dec 2023

Numerical Investigation Of Physical Parameters In Cardiac Vessels As A New Medical Support Science For Complex Blood Flow Characteristics, Defrianto, Toto Saktioto, Yan Soerbakti, Andika Thoibah, Bunga Meyzia, Romi Fadli Syahputra, Okfalisa, Syamsudhuha, Dedi Irawan, Haryana Hairi

Baghdad Science Journal

This study proposes a mathematical approach and numerical experiment for a simple solution of cardiac blood flow to the heart's blood vessels. A mathematical model of human blood flow through arterial branches was studied and calculated using the Navier-Stokes partial differential equation with finite element analysis (FEA) approach. Furthermore, FEA is applied to the steady flow of two-dimensional viscous liquids through different geometries. The validity of the computational method is determined by comparing numerical experiments with the results of the analysis of different functions. Numerical analysis showed that the highest blood flow velocity of 1.22 cm/s occurred in the center …

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Synthesis Of Carbon Nanotubes Using Modified Hummers Method For Cathode Electrodes In Dye-Sensitized Solar Cell, Mazin Hasan Raheema, Ghufran S. Jaber Dec 2023

Synthesis Of Carbon Nanotubes Using Modified Hummers Method For Cathode Electrodes In Dye-Sensitized Solar Cell, Mazin Hasan Raheema, Ghufran S. Jaber

Baghdad Science Journal

In this research, carbon nanotubes (CNTs) is prepared through the Hummers method with a slight change in some of the work steps, thus, a new method has been created for preparing carbon nanotubes which is similar to the original Hummers method that is used to prepare graphene oxide. Then, the suspension carbon nanotubes is transferred to a simple electrode position platform consisting of two electrodes and the cell body for the coating and reduction of the carbon nanotubes on ITO glass which represents the cathode electrode while platinum represents the anode electrode. The deposited layer of carbon nanotubes is examined …

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Heat Production Rate And Radiation Hazard Indices From Radioactive Elements In Different Types Of Natural Water In Nineveh Governorate, Iraq., Danya Saleh Mustafa Al-Sofy, Firas Mohammed Ali Al-Jomaily Dec 2023

Heat Production Rate And Radiation Hazard Indices From Radioactive Elements In Different Types Of Natural Water In Nineveh Governorate, Iraq., Danya Saleh Mustafa Al-Sofy, Firas Mohammed Ali Al-Jomaily

Baghdad Science Journal

The current study sheds light on the measurement and estimation of the radioactivity of radionuclides (238U, 226Ra, 232Th, and 40k) in natural waters of different regions of Nineveh Governorate in Iraq.15 samples were collected from different sources of natural waters, where gamma-ray spectroscopy was used using NaI)TI) sodium iodide detector to determine the concentration of radioactivity in the samples. According to the results, the radioactivity concentration in the tested water sample were ​​ranged from 0.36 ± 0.04-1.57 ± 0.09with an average value of 0.69 ± 0.06 Bq/l for 238U, and 2.9 ± 0.02-0.88 ± 0.03 with an average value of …

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Building A Statistical Model To Detect Foreground Objects And Using It In Video Steganography, Mithal Hadi Jebur, Fanar Ali Joda, Mohammed Abdullah Naser Dec 2023

Building A Statistical Model To Detect Foreground Objects And Using It In Video Steganography, Mithal Hadi Jebur, Fanar Ali Joda, Mohammed Abdullah Naser

Baghdad Science Journal

Video steganography has become a popular option for protecting secret data from hacking attempts and common attacks on the internet. However, when the whole video frame(s) are used to embed secret data, this may lead to visual distortion. This work is an attempt to hide sensitive secret image inside the moving objects in a video based on separating the object from the background of the frame, selecting and arranging them according to object's size for embedding secret image. The XOR technique is used with reverse bits between the secret image bits and the detected moving object bits for embedding. The …

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Solving The Hotdog Problem By Using The Joint Zero-Order Finite Hankel - Elzaki Transform, Roqia Khaled Rdwan, Mohammed Mahmoud Amer Dec 2023

Solving The Hotdog Problem By Using The Joint Zero-Order Finite Hankel - Elzaki Transform, Roqia Khaled Rdwan, Mohammed Mahmoud Amer

Baghdad Science Journal

This paper is concerned with combining two different transforms to present a new joint transform FHET and its inverse transform IFHET. Also, the most important property of FHET was concluded and proved, which is called the finite Hankel – Elzaki transforms of the Bessel differential operator property, this property was discussed for two different boundary conditions, Dirichlet and Robin. Where the importance of this property is shown by solving axisymmetric partial differential equations and transitioning to an algebraic equation directly. Also, the joint Finite Hankel-Elzaki transform method was applied in solving a mathematical-physical problem, which is the Hotdog Problem. A …

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Impactful Interactivity Within Video Games, Luke Robert Maeser Dec 2023

Impactful Interactivity Within Video Games, Luke Robert Maeser

Theses

Despite half a century of existence and dedicated academic programs educating next generations of game developers, conclusive evidence does not exist as to if video games are beneficial to learning or costly. Examining the notion of benefit versus cost, it is important to assess the value of video games when leveraged as tools for learning as traditional educational methodologies are not infallible. This paper explores how video games can generate psychological responses; and therefore, one must conclude learning has occurred. The following is encompassed: meaningful interactivity within video games (regarding narrative and gameplay), video games as educational tools, video game …

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The Importance Of Female Bass Players: How They Have Influenced And Shaped Our Conception Of Music, Jessica Sacks Dec 2023

The Importance Of Female Bass Players: How They Have Influenced And Shaped Our Conception Of Music, Jessica Sacks

Theses

Music allows us to think creatively, dream, and create a soundtrack for our lives. When we think of female artists, most people recognize singers, but I want to describe how women have shaped music for over sixty years with their fantastic playing abilities. This project will analyze how female bass players have contributed to American music and society.

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Maximising Captured Power And Battery Management For Heaving Wave Energy Converters, Omsalama Mubarak Mohamed Dec 2023

Maximising Captured Power And Battery Management For Heaving Wave Energy Converters, Omsalama Mubarak Mohamed

Dissertations

Sea waves are considered the most potent energy carriers among all sources of renewable energy. This research work is concerned with developingtechnologies to enhance performance and improve power capturing and conversion capabilities of a single heaving wave energy converter (WEC) actuated by a PMLG (Permanent Magnet Linear Generator). The objective of this dissertation is achieved by three techniques. The first one considers maximizing conversion between the mechanical and electrical powers. It is implemented by designing intrinsic resistance using a rapid procedure involving the mechanical and electrical models of the converter and considering its operating constraints. A robust PID (proportional – …

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A Comprehensive Review On Shale Studies With Emphasis On Nuclear Magnetic Resonance (Nmr) Technique, Yujie Yuan, Reza Rezaee, Mei-Fu Zhou, Stefan Iglauer Dec 2023

A Comprehensive Review On Shale Studies With Emphasis On Nuclear Magnetic Resonance (Nmr) Technique, Yujie Yuan, Reza Rezaee, Mei-Fu Zhou, Stefan Iglauer

Research outputs 2022 to 2026

Multi-scale shale studies put a significant emphasis on high-resolution investigations from nanometer to decametre scales. Despite that multiple advanced techniques have been used in shale studies, they are mostly limited to the detection scopes and have restricted capacity for high-resolution characterization of shale nanopores with substantial heterogeneity. Therefore, it remains a challenge for accurate resource estimation in unconventional shales. The nuclear magnetic resonance (NMR) is an advanced technique enabling non-destructive and fast measurements, and has the advantage of high-resolution evaluation of shale formations and nanopore structure. Petrophysical studies using NMR have made breakthroughs in shale studies. However, multi-scale shale investigations …

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Numerical Investigation Of Lead Free Cs2tibr6 Based Perovskite Solar Cell With Optimal Selection Of Electron And Hole Transport Layer Through Scaps-1d Simulation, Hironmoy Karmaker, Ayesha Siddique, Barun K. Das Dec 2023

Numerical Investigation Of Lead Free Cs2tibr6 Based Perovskite Solar Cell With Optimal Selection Of Electron And Hole Transport Layer Through Scaps-1d Simulation, Hironmoy Karmaker, Ayesha Siddique, Barun K. Das

Research outputs 2022 to 2026

Halide-based perovskite has several advantages, including high efficiency, ease of manufacture, and low cost. In general, hazardous lead (Pb) is used in perovskite solar cells as an absorber layer, while polymer, which is unstable in nature used as the electron/hole transport layer. Despite its appealing characteristics, the device uses of lead and degradable components must be addressed. Lead-free titanium-based inorganic perovskite solar cells (PSCs) have drawn strong scientific interest in recent years in order to reduce the possibly detrimental effects of lead on the environment. Titanium is non-toxic, robust, inexpensive, and widely available when compared to other elements. The performance …

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Capillary-Sealing Efficiency Of Mica-Proxy Caprock For Co2/H2 Geologic Storage In The Presence Of Organic Acids And Nanofluids, Amer Alanazi, Muhammad Ali, Mahmoud Mowafi, Saleh Bawazeer, Ziyad K K. Kaidar, Hussein Hoteit Dec 2023

Capillary-Sealing Efficiency Of Mica-Proxy Caprock For Co2/H2 Geologic Storage In The Presence Of Organic Acids And Nanofluids, Amer Alanazi, Muhammad Ali, Mahmoud Mowafi, Saleh Bawazeer, Ziyad K K. Kaidar, Hussein Hoteit

Research outputs 2022 to 2026

Toward a diversified low-carbon future, the geological storage of carbon dioxide (CO2) and hydrogen (H2) is regarded as a key enabler for an industrial-scale implementation. However, many geological formations, such as depleted oil and gas reservoirs, can contain inherent traces of organic molecules that dramatically affect their storage capacities and caprock sealing efficiency. Hence, using the right analysis to accurately determine the caprock sealing efficiency and storage capacity in the presence of organics is crucial for a secure and safe storage process. This study analyzed the sealing potential of a proxy caprock (mica) by calculating the capillary entry pressure and …

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Parapapillary Βbm And Γ Zones Played Different Roles In Axial Elongation Among Young Adolescents Using Optical Coherence Tomography, Yin Guo, Jiayan Li, Feifei Tian, Rui Hou, Lijuan Liu, Jiali Duan, Ang Ji, Youxin Wang, Xiuhua Guo, Deqiang Zheng, Wei Wang, Lijuan Wu Dec 2023

Parapapillary Βbm And Γ Zones Played Different Roles In Axial Elongation Among Young Adolescents Using Optical Coherence Tomography, Yin Guo, Jiayan Li, Feifei Tian, Rui Hou, Lijuan Liu, Jiali Duan, Ang Ji, Youxin Wang, Xiuhua Guo, Deqiang Zheng, Wei Wang, Lijuan Wu

Research outputs 2022 to 2026

Purpose: To evaluate the influencing factors of parapapillary BM and zones incidence in young adolescents and to explore their associations with axial length progression. Methods: In this prospective cohort study, 976 seventh-grade students from nine secondary schools in Beijing, China, were enrolled and followed up 1 year later. Parapapillary BM zone was defined as retinal pigment epithelium loss while Bruch's membrane was present. Parapapillary zone was defined as the absence of retinal pigment epithelium and Bruch's membrane. Logistic regression model was used to analyze the influencing factors of BM and zone incidence. A linear mixed model was used to analyze …

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4-Band Personal Eq Device, Carson Kellerman Dec 2023

4-Band Personal Eq Device, Carson Kellerman

Electrical Engineering

The device is a 4-band EQ with 3.5mm audio input and output jacks. The device has 4 adjustable EQ bands. Each of the 4 bands are adjustable via knob potentiometers, and are able to boost or cut their respective center frequencies of 150Hz, 400Hz, 2500Hz, and 10kHz from -15dB to +15dB. The device is battery powered off of 1 9V battery and is able to function for 10 hours before needing to replace the batteries. The device has a Total Harmonic Distortion of less than 1% and a Signal to Noise Ratio greater than 60dB. Overall, this device allows music …

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