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Articles 38551 - 38580 of 40945
Full-Text Articles in Entire DC Network
Bright Chromenylium Polymethine Dyes Enable Fast, Four-Color "In Vivo" Imaging With Shortwave Infrared Detection, Emily D. Cosco, Bernardo A. Arús, Anthony L. Spearman, Timothy Luke Atallah, Irene Lim
Bright Chromenylium Polymethine Dyes Enable Fast, Four-Color "In Vivo" Imaging With Shortwave Infrared Detection, Emily D. Cosco, Bernardo A. Arús, Anthony L. Spearman, Timothy Luke Atallah, Irene Lim
Faculty Publications
No abstract provided.
Data Science In Undergraduate Life Science Education: A Need For Instructor Skills Training, Nathan C. Emery, Erika Crispo, Sarah R. Supp, Kaitlin J. Farrell, Andrew J. Kerkhoff
Data Science In Undergraduate Life Science Education: A Need For Instructor Skills Training, Nathan C. Emery, Erika Crispo, Sarah R. Supp, Kaitlin J. Farrell, Andrew J. Kerkhoff
Faculty Publications
No abstract provided.
Estimating The Movements Of Terrestrial Animal Populations Using Broad-Scale Occurrence Data, Sarah R. Supp, Gil Bohrer, John Fieberg, Frank A. La Sorte
Estimating The Movements Of Terrestrial Animal Populations Using Broad-Scale Occurrence Data, Sarah R. Supp, Gil Bohrer, John Fieberg, Frank A. La Sorte
Faculty Publications
No abstract provided.
Kpop's Influence On Redefining Masculinity Within Heternormative Regimes, Katherine Stolze
Kpop's Influence On Redefining Masculinity Within Heternormative Regimes, Katherine Stolze
Student Scholarship
No abstract provided.
Grand Opening, Claire Parker
Grand Opening, Claire Parker
The Synapse: Intercollegiate science magazine
No abstract provided.
The Great Firewall Of China: The Implementations And Impact Of Internet Censorship, Nathan Englehart
The Great Firewall Of China: The Implementations And Impact Of Internet Censorship, Nathan Englehart
The Synapse: Intercollegiate science magazine
No abstract provided.
Drunk Drivers Are A Moving Time Bomb: Should States Impose Liability On Both Social Hosts And Commercial Establishments Whose Intoxicated Guests And Patrons Subsequently Cause Injuries Or Death To Innocent Third Parties, Tracey B. Carter
Law Faculty Scholarship
This Article examines whether states should impose civil liability not only on commercial alcohol vendors under dram shop statutes, but also on social hosts whose intoxicated guests subsequently cause injury or death to innocent third parties. Drawing upon national drunk-driving statistics, historical development of dram shop laws, and comparative analysis of state approaches—particularly in Southeastern jurisdictions—the Article evaluates the effectiveness and limitations of existing liability frameworks. While most states recognize statutory liability for commercial establishments that serve visibly intoxicated persons or minors, many decline to extend comparable liability to social hosts serving adult guests. The Article analyzes the policy arguments …
Startups And Human Capital Management In Egypt: In Search Of Decent Jobs, Maryham Abdel Malak, Ibrahem El Sayed Hassan, Fayrouz El Dabbagh, Laila M. El Baradei
Startups And Human Capital Management In Egypt: In Search Of Decent Jobs, Maryham Abdel Malak, Ibrahem El Sayed Hassan, Fayrouz El Dabbagh, Laila M. El Baradei
Papers, Posters, and Presentations
While startups are considered an important potential contributor to Egypt’s economic growth, they encounter myriad challenges that hinder their ability to reach their potential, sustain their market presence, and their capacity to provide decent job opportunities. Challenges include the difficulty of locating and sustaining funding, the complicated legal and regulatory framework that governs them, the conservative social norms and culture, and the lack of data and information regarding market dynamics and existing opportunities. The research findings revealed that many startups face challenges with their Human Capital Management (HCM), in the planning, acquisition, development, or sanction functions. This policy paper examines …
The Challenge Of Deterring Bad Police Behavior: Implementing Reforms That Hold Police Accountable, Robert M. Bloom, Nina Labovich
The Challenge Of Deterring Bad Police Behavior: Implementing Reforms That Hold Police Accountable, Robert M. Bloom, Nina Labovich
Case Western Reserve Law Review
No abstract provided.
Takedowns And Terminations: Twitch’S Transgressions And Streamers’ Struggles, Hannah Baker
Takedowns And Terminations: Twitch’S Transgressions And Streamers’ Struggles, Hannah Baker
Case Western Reserve Law Review
No abstract provided.
Predicting Material Properties: Applications Of Multi-Scale Multiphysics Numerical Modeling To Transport Problems In Biochemical Systems And Chemical Process Engineering, Tom Pace
Theses and Dissertations--Physics and Astronomy
Material properties are used in a wide variety of theoretical models of material behavior. Descriptive properties quantify the nature, structure, or composition of the material. Behavioral properties quantify the response of the material to an imposed condition. The central question of this work concerns the prediction of behavioral properties from previously determined descriptive properties through hierarchical multi-scale, multiphysics models implemented as numerical simulations. Applications covered focus on mass transport models, including sequential enzyme-catalyzed reactions in systems biology, and an industrial chemical process in a common reaction medium.
The Antithesis Of ‘Business As Usual’: Youth, Class, And Volunteer Organizations In Dar Es Salaam, Tanzania, Chelsea Cutright
The Antithesis Of ‘Business As Usual’: Youth, Class, And Volunteer Organizations In Dar Es Salaam, Tanzania, Chelsea Cutright
Theses and Dissertations--Anthropology
Youth in Tanzania make up the majority of the current growing population and therefore are increasingly a focus of local and international development concern, specifically as the rates of urban growth and unemployment are also increasing. This research builds upon existing anthropological literature, which largely addresses contemporary and urban African youths as “problems” in dire need of governmental intervention and international solutions. Through explorations of the ways in which Tanzanian youth are actively and creatively working to improve their own futures, utilizing their own agency to create opportunities, and solving their own problems in the absence of successful external intercessions, …
Producing Possibilities: Envisioning And Mediating Youth, Identities, And Futures In Central Appalachia, Tammy Lynn Clemons
Producing Possibilities: Envisioning And Mediating Youth, Identities, And Futures In Central Appalachia, Tammy Lynn Clemons
Theses and Dissertations--Anthropology
This dissertation, based on anthropological research between 2015 and 2020, focuses on young people in different yet interconnected social contexts in Central Appalachia and how they envision, construct, and act upon possibilities for themselves and the region through multimodal cultural production processes like visual art, performance, and multisensory media. The research question focusing this project was: How do the social contexts of young Appalachians’ engagement in media consumption and production practices shape the possibilities they envision for themselves, others, and their region? I found that the specific contexts were less important than the interconnected mentoring conversations across sites and generations …
"Roses Remind Me Of Aleppo": Ironic Home, Beckoning States, And Memories Of Syrian Armenian Women In Yerevan, Armenia, Anahid Matossian
"Roses Remind Me Of Aleppo": Ironic Home, Beckoning States, And Memories Of Syrian Armenian Women In Yerevan, Armenia, Anahid Matossian
Theses and Dissertations--Anthropology
This project contributes to anthropologies of the state, (diasporic return) migration, belonging, home, and conflict, including genocide and war. It intervenes in the anthropology of home by focusing on both the social and physical aspects of home, its pain, joys, and ironies, and it speaks to the anthropology of genocide by showing how a population a century removed from a genocide uses it to interpret their experience. This dissertation also deals with state constructions of ideal citizen formation--one of obligation and devotion to the socially constructed ancestral homeland, where descendants who share an ethnic identity have a role to play …
Reimagining Care: Surviving And Thriving Among Lgbtq African Americans In Birmingham, Alabama, Stacie Lynn Hatfield
Reimagining Care: Surviving And Thriving Among Lgbtq African Americans In Birmingham, Alabama, Stacie Lynn Hatfield
Theses and Dissertations--Anthropology
This dissertation draws on fieldwork with Black LGBTQ identifying individuals and communities in Birmingham, Alabama conducted from 2015-2019 as part of a project that reimagines theories of care. Informed by scholars of Black and feminist studies, I conceive of forms of care as negotiations of survival and tactics of thriving that are worked out in everyday practices and discourses among LGBTQ African Americans. I show how histories of racial inequality and centuries of resistance, surviving, and thriving among communities of African descent intersect with LGBTQ politics, space, and identity to create strategies and places of individual and community care. My …
Social Differentiation Among Rural Maya Households In Chunhuayum, Yucatan, Mexico, During The Late Preclassic Through The Early Classic (300 B.C. – A.D. 600), Céline Lamb
Theses and Dissertations--Anthropology
This dissertation addresses social differentiation among rural residents of Chunhuayum, an ancient Maya village in northwest Yucatan, from the Late Preclassic to the Late Early Classic (300 B.C. – A.D. 600/630). The three axes of social differentiation investigated are household wealth, occupation, and social connectivity to external networks. Using a practice theory approach, my research seeks to identify how material and social practices shaped and expressed social differentiation among Chunhuayum households, as well as how these may have shaped the particular history of Chunhuayum within its regional context. Throughout Chunhuayum’s occupation, residential architecture was the most salient marker of wealth …
Photoperiod Decelerates The Advance Of Spring Phenology Of Six Deciduous Tree Species Under Climate Warming, Lin Meng, Yuyu Zhou, Lianhong Gu, Andrew D. Richardson, Josep Peñuelas, Yongshuo Fu, Yeqiao Wang, Ghasserm R. Asrar, Hans G. De Boeck, Jiafu Mao, Yongguang Zhang, Zhousen Wang
Photoperiod Decelerates The Advance Of Spring Phenology Of Six Deciduous Tree Species Under Climate Warming, Lin Meng, Yuyu Zhou, Lianhong Gu, Andrew D. Richardson, Josep Peñuelas, Yongshuo Fu, Yeqiao Wang, Ghasserm R. Asrar, Hans G. De Boeck, Jiafu Mao, Yongguang Zhang, Zhousen Wang
Natural Resources Science Faculty Publications
Vegetation phenology in spring has substantially advanced under climate warming, consequently shifting the seasonality of ecosystem process and altering biosphere–atmosphere feedbacks. However, whether and to what extent photoperiod (i.e., daylength) affects the phenological advancement is unclear, leading to large uncertainties in projecting future phenological changes. Here we examined the photoperiod effect on spring phenology at a regional scale using in situ observation of six deciduous tree species from the Pan European Phenological Network during 1980–2016. We disentangled the photoperiod effect from the temperature effect (i.e., forcing and chilling) by utilizing the unique topography of the northern Alps of Europe (i.e., …
Vegf-A, Pdgf-Bb And Hb-Egf Engineered For Promiscuous Super Affinity To The Extracellular Matrix Improve Wound Healing In A Model Of Type 1 Diabetes, Michael J. White, Priscilla S. Briquez, David White, Jeffrey A. Hubbell
Vegf-A, Pdgf-Bb And Hb-Egf Engineered For Promiscuous Super Affinity To The Extracellular Matrix Improve Wound Healing In A Model Of Type 1 Diabetes, Michael J. White, Priscilla S. Briquez, David White, Jeffrey A. Hubbell
Faculty Publications
No abstract provided.
Making The Diversity, Equity, And Inclusion Mindset Indispensable In The Lis Classroom Through Design, Content, Communication, And Assessment, Kim M. Thompson, Clayton A. Copeland
Making The Diversity, Equity, And Inclusion Mindset Indispensable In The Lis Classroom Through Design, Content, Communication, And Assessment, Kim M. Thompson, Clayton A. Copeland
Faculty Publications
When we incorporate diversity and inclusion into Library and Information Science course design and content and build communication and learning frameworks in the classroom on inclusive principles, we build a cohort of students who cannot “unsee” these basic principles as they engage in practice. By designing lecture and activity materials that allow students to read and engage with different perspectives about professional values and content, we create opportunities for awareness building and prepare students to engage with the same practices as they join the profession. This chapter provides insights for and examples of how to create courses that bring diversity, …
Analysis Of Social Media Discussions On (#)Diet By Blue, Red, And Swing States In The U.S, Amir Karami, A. A. Dahl, J. G. Shaw, S. P. Valappil, G. Turner-Mcgrievy, H. Kharrazi, P. Bozorgi
Analysis Of Social Media Discussions On (#)Diet By Blue, Red, And Swing States In The U.S, Amir Karami, A. A. Dahl, J. G. Shaw, S. P. Valappil, G. Turner-Mcgrievy, H. Kharrazi, P. Bozorgi
Faculty Publications
The relationship between political affiliations and diet-related discussions on social media has not been studied on a population level. This study used a cost- and -time effective framework to leverage, aggregate, and analyze data from social media. This paper enhances our understanding of diet-related discussions with respect to political orientations in U.S. states. This mixed methods study used computational methods to collect tweets containing “diet” or “#diet” shared in a year, identified tweets posted by U.S. Twitter users, disclosed topics of tweets, and compared democratic, republican, and swing states based on the weight of topics. A qualitative method was employed …
Automatic Categorization Of Lgbt User Profiles On Twitter With Machine Learning, Amir Karami, M. Lundy, F. Webb, H. R. Boyajieff, M. Zhu, D. Lee
Automatic Categorization Of Lgbt User Profiles On Twitter With Machine Learning, Amir Karami, M. Lundy, F. Webb, H. R. Boyajieff, M. Zhu, D. Lee
Faculty Publications
Privacy needs and stigma pose significant barriers to lesbian, gay, bisexual, and transgender (LGBT) people sharing information related to their identities in traditional settings and research methods such as surveys and interviews. Fortunately, social media facilitates people’s belonging to and exchanging information within online LGBT communities. Compared to heterosexual respondents, LGBT users are also more likely to have accounts on social media websites and access social media daily. However, the current relevant LGBT studies on social media are not efficient or assume that any accounts that utilize LGBT-related words in their profile belong to individuals who identify as LGBT. Our …
A Systematic Literature Review Of Sexual Harassment Studies With Text Mining, Amir Karami, Melek Yildiz Spinel, C. Nicole White, Kayla Ford, Suzanne Swan
A Systematic Literature Review Of Sexual Harassment Studies With Text Mining, Amir Karami, Melek Yildiz Spinel, C. Nicole White, Kayla Ford, Suzanne Swan
Faculty Publications
Sexual harassment has been the topic of thousands of research articles in the 20th and 21st centuries. Several review papers have been developed to synthesize the literature about sexual harassment. While traditional literature review studies provide valuable insights, these studies have some limitations including analyzing a limited number of papers, being time-consuming and labor-intensive, focusing on a few topics, and lacking temporal trend analysis. To address these limitations, this paper employs both computational and qualitative approaches to identify major research topics, explore temporal trends of sexual harassment topics over the past few decades, and point to future possible directions in …
Covid-19 Vaccine And Social Media In The U.S.: Exploring Emotions And Discussions On Twitter, Amir Karami, Michael Zhu, Bailey Goldschmidt, Hannah R. Boyajieff, Mahdi M. Najafabadi
Covid-19 Vaccine And Social Media In The U.S.: Exploring Emotions And Discussions On Twitter, Amir Karami, Michael Zhu, Bailey Goldschmidt, Hannah R. Boyajieff, Mahdi M. Najafabadi
Faculty Publications
The understanding of the public response to COVID-19 vaccines is the key success factor to control the COVID-19 pandemic. To understand the public response, there is a need to explore public opinion. Traditional surveys are expensive and time-consuming, address limited health topics, and obtain small-scale data. Twitter can provide a great opportunity to understand public opinion regarding COVID-19 vaccines. The current study proposes an approach using computational and human coding methods to collect and analyze a large number of tweets to provide a wider perspective on the COVID-19 vaccine. This study identifies the sentiment of tweets using a machine learning …
Exploring Anatomy Coursework And Perceptions Of Occupational Therapy Students: A Survey Study, Ashleigh Giles, William Conrad, Dianna Lunsford, Kristin A. Valdes
Exploring Anatomy Coursework And Perceptions Of Occupational Therapy Students: A Survey Study, Ashleigh Giles, William Conrad, Dianna Lunsford, Kristin A. Valdes
Journal of Occupational Therapy Education
Occupational therapy practitioners utilize their knowledge of human anatomy to understand underlying anatomical dysfunction and how it impacts occupational performance. However, anatomy is not a required standalone course within occupational therapy curricula. This may leave students at a disadvantage throughout occupational therapy programs, fieldwork, and as practitioners. The primary purpose of this study was to explore graduate level occupational therapy students’ previous anatomy undergraduate coursework, student perceived preparedness of anatomical knowledge, and their performance in a mandatory Analysis of Human Movement course within our university’s occupational therapy graduate programs. The secondary purpose was to determine student interest in a standalone …
Mahanoy Area School District V. B.L.: The Court Protects Student Social Media But Leaves Unanswered Questions, David L. Hudson Jr.
Mahanoy Area School District V. B.L.: The Court Protects Student Social Media But Leaves Unanswered Questions, David L. Hudson Jr.
Law Faculty Scholarship
In Mahanoy Area School District v. B.L.: The Court Protects Student Social Media but Leaves Unanswered Questions, published in the Cato Supreme Court Review, David L. Hudson Jr. analyzes the U.S. Supreme Court’s landmark decision addressing the scope of public schools’ authority over off-campus student speech on social media. Situating Mahanoy within the Court’s broader K–12 student speech jurisprudence—from Barnette and Tinker to Fraser, Hazelwood, and Morse—the Article explains how the Court declined to adopt a categorical rule excluding off-campus speech from regulation while nevertheless ruling in favor of the student. The majority recognized diminished school …
การวิเคราะห์ศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์บนหลังคาโดยใช้เทคโนโลยีภูมิสารสนเทศ, เปรมใจ ซิบเข
การวิเคราะห์ศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์บนหลังคาโดยใช้เทคโนโลยีภูมิสารสนเทศ, เปรมใจ ซิบเข
Chulalongkorn University Theses and Dissertations (Chula ETD)
ความต้องการใช้พลังงานไฟฟ้าในประเทศไทยมีแนวโน้มที่เพิ่มขึ้น แต่เชื้อเพลิงที่ใช้เพื่อผลิตไฟฟ้าในประเทศส่วนมากยังเป็นเชื้อเพลิงจากทรัพยากรที่ใช้แล้วหมดไปซึ่งสร้างมลภาวะทางสิ่งแวดล้อม และส่งผลเสียต่อสุขภาพของมนุษย์ ประกอบกับแนวโน้มการลดลงของต้นทุนระบบผลิตไฟฟ้าจากพลังงานแสงอาทิตย์ ทำให้การใช้พลังงานแสงอาทิตย์เพื่อผลิตไฟฟ้าได้รับความนิยมในปัจจุบัน งานวิจัยนี้จึงมีจุดประสงค์เพื่อพัฒนาฐานข้อมูลหลังคาอาคารเพื่อการติดตั้งแผงเซลล์แสงอาทิตย์ วิเคราะห์ศักยภาพของพื้นที่สำหรับการติดตั้งแผงเซลล์แสงอาทิตย์บนหลังคาด้วยปัจจัยทางกายภาพและปัจจัยทางเทคนิคโดยใช้เทคโนโลยีภูมิสารสนเทศ และพัฒนาเว็บแอปพลิเคชันแสดงปริมาณพลังงานไฟฟ้าที่ผลิตได้และระดับศักยภาพของพื้นที่ มีพื้นที่ศึกษาอยู่ที่ ตำบลท่าอิฐ อำเภอปากเกร็ด จังหวัดนนทบุรี การพัฒนาฐานข้อมูลหลังคาอาคารใช้การจำแนกขอบเขตหลังคาด้วยเทคนิควิธีการเรียนรู้เชิงลึก (Deep Learning) โดยสร้างแบบจำลองเพื่อวาดขอบเขตหลังคาอาคารโดยใช้ข้อมูลจากภาพถ่ายจากดาวเทียม WorldView-3 จากนั้นจึงนำฐานข้อมูลไปใช้วิเคราะห์พลังงานไฟฟ้าที่ผลิตได้ และศักยภาพของพื้นที่ในการติดตั้งแผงเซลล์แสงอาทิตย์ ผลการศึกษาพบว่า พื้นที่หลังคาทั้งหมดในพื้นที่ศึกษามีขนาดรวม 749,563.23 ตารางเมตร สามารถคำนวณค่าพลังงานไฟฟ้าที่ผลิตจากแผงเซลล์แสงอาทิตย์บนหลังคาได้ 86.14 กิกะวัตต์-ชั่วโมงต่อปี หมู่บ้านที่มีระดับศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์ในระดับสูง ได้แก่ บ้านคลองชมพู่ และบ้านลาดสิงห์ ซึ่งมีศักยภาพในการผลิตไฟฟ้าได้จากแผงเซลล์แสงอาทิตย์ได้มากกว่า 20 กิกะวัตต์-ชั่วโมงต่อปี ผลการวิจัยนี้สามารถประยุกต์ใช้เพื่อแนวทางในการพัฒนาฐานข้อมูล การประมาณค่าพลังงาน และศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์ในพื้นที่อื่นได้
ความสัมพันธ์ระหว่างการเปิดรับข่าวสาร การรับรู้ ทัศนคติ และพฤติกรรมทางเพศที่พึงประสงค์ของนักเรียนมัธยมศึกษาตอนปลาย, นรกมล กองสุข
ความสัมพันธ์ระหว่างการเปิดรับข่าวสาร การรับรู้ ทัศนคติ และพฤติกรรมทางเพศที่พึงประสงค์ของนักเรียนมัธยมศึกษาตอนปลาย, นรกมล กองสุข
Chulalongkorn University Theses and Dissertations (Chula ETD)
การวิจัยครั้งนี้มีวัตถุประสงค์ 1) เพื่อศึกษาระดับการเปิดรับข่าวสาร การรับรู้ ทัศนคติ และพฤติกรรมทางเพศที่พึงประสงค์ของนักเรียนมัธยมศึกษาตอนปลาย 2) เพื่อศึกษาความสัมพันธ์ระหว่างปัจจัยลักษณะทั่วไปของประชากรกับระดับการเปิดรับข่าวสาร การรับรู้ ทัศนคติ และพฤติกรรมทางเพศที่พึงประสงค์ของนักเรียนมัธยมศึกษาตอนปลาย และ 3) เพื่อศึกษาความสัมพันธ์ระหว่างการเปิดรับข่าวสาร การรับรู้ และทัศนคติกับพฤติกรรมทางเพศที่พึงประสงค์ของนักเรียนมัธยมศึกษาตอนปลาย กลุ่มตัวอย่างเป็นนักเรียนมัธยมศึกษาปีที่ 4-6 จำนวน 450 คน ที่ได้จากการสุ่มหลายขั้นตอน เครื่องมือที่ใช้ในการวิจัย คือ แบบสอบถามออนไลน์ วิเคราะห์ข้อมูลโดยใช้การแจกแจงความถี่ ร้อยละ ค่าเฉลี่ย และส่วนเบี่ยงเบนมาตรฐาน การทดสอบไคสแควร์ และสถิติสัมประสิทธิ์สหสัมพันธ์เพียร์สัน ผลการวิจัยพบว่า 1)กลุ่มตัวอย่างมีการเปิดรับข่าวสารและการรับรู้อยู่ในระดับน้อย ส่วนทัศนคติและพฤติกรรมทางเพศที่พึงประสงค์อยู่ในมาก 2) ความสัมพันธ์กับปัจจัยลักษณะทั่วไป การเปิดรับข่าวสารมีความสัมพันธ์กับปัจจัยด้านระดับชั้นและปัจจัยด้านอายุ การรับรู้มีความสัมพันธ์กับปัจจัยด้านเพศและปัจจัยด้านอายุ ทัศนคติมีความสัมพันธ์กับปัจจัยด้านเพศและปัจจัยด้านอายุ และพฤติกรรมทางเพศที่พึงประสงค์มีความสัมพันธ์กับปัจจัยด้านระดับชั้นและปัจจัยด้านอายุ 3) ความสัมพันธ์ระหว่างพฤติกรรมทางเพศที่พึงประสงค์ พบว่า การเปิดรับข่าวสารมีระดับความสัมพันธ์ทางลบอยู่ในระดับต่ำ (r = -0.16) การรับรู้ไม่มีความสัมพันธ์ และทัศนคติมีระดับความสัมพันธ์ทางบวกอยู่ในระดับต่ำ (r = 0.31)
Magnetization Dynamics In Kagome Artificial Spin Ice Considering The Effect Of Vertex And Geometrical Lattice Distortion, Ali Frotanpour
Magnetization Dynamics In Kagome Artificial Spin Ice Considering The Effect Of Vertex And Geometrical Lattice Distortion, Ali Frotanpour
Theses and Dissertations--Physics and Astronomy
Artificial spin ices (ASI) have been shown to exhibit dynamic magnetic responses that are dramatically different from plane magnetic thin films. A number of magnetic ASI have been fabricated and measured in recent years. However, some important effects including influence of vertex and geometrical distortion on their dynamic response have not been addressed. This dissertation adopts Ferromagnetic Resonance (FMR) spectroscopy to study magnetization dynamics in fabricated artificial spin ices with a contentiously distorted Honeycomb geometry with the specific goal of exploring how the vertex and lattice distortion affect the dynamic magnetic response. Samples were patterned using electron beam lithography techniques. …
Optical Metasurfaces, Fatih Balli
Optical Metasurfaces, Fatih Balli
Theses and Dissertations--Physics and Astronomy
Traditional optical elements, such as refractive lenses, mirrors, phase plates and polarizers have been used for various purposes such as imaging systems, lithographic printing, astronomical observations and display technology. Despite their long-term achievements, they can be bulky and not suitable for miniaturization. On the other hand, recent nanotechnology advances allowed us to manufacture micro and nanoscale devices with ultra-compact sizes. Metasurfaces, 2D engineered artificial interfaces, have emerged as candidates to replace traditional refractive lenses with ultra-thin miniaturized optical elements. They possess sub-wavelength unit cell structures with a specific geometry and material selection. Each unit cell can uniquely tailor the phase, …