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Effect Of Eco-Enzyme Application On Soil Nutrient And Plant Productivity Of Green Mustard-Peanut In Inceptisol, Idris Abd Rachman, Buhari Umasugi, Krishna Aji, Nurul Fahira A Hakim, Adnan Sofyan, Asrul Dedy Ali Hasan

Jurnal Kultivasi

Appropriate land management has a long-term impact on soil performance and is believed to improve soil fertility. This study investigated the effect of eco-enzymes on soil nutrients and plant productivity of green mustard-peanut in inceptisol. The research was conducted from February to April 2025. The experiment used a randomized block design (RBD) consisting of 5 treatments and replicated 3 times, so that there were 15 units, including N0 = without Eco-enzyme, N1 = Eco-enzyme 2cc/L. N2= Eco-enzyme 4cc/L, N3= Eco-enzyme 6cc/L, and N4= Eco-enzyme 8cc/L. The commodities used were green mustard (Brassica juncea L) and peanut (Arachis hypogaea Linn). Soil …

Career: Algebra And Representation Theory For Non-Semisimple Topological Field Theory, Matthew Young

Funded Research Records

No abstract provided.

A Reconstruction Of Late Pleistocene And Holocene Paleoclimate Record Using Radiocarbon Dating And Noble Gas Thermometry Of Groundwater In Shelby County, Tennessee, Megan Marie Purvis

Electronic Theses and Dissertations Archive

Paleoclimate proxies, including groundwater, tree rings, ice, deep-sea sediments, and speleothems, have identified climate changes of various magnitudes throughout Earth’s history. Previous research has utilized noble gas temperatures and radiocarbon (14C) dating of groundwater to understand prehistoric climate, and the groundwater under Shelby County, Tennessee, is ideal for obtaining high-precision paleoclimate data for the south-central region of North America. This research derived groundwater recharge temperatures ranging from Pleistocene and Holocene ages utilizing available noble gas data modeled with the program PANGA. The program estimated paleotemperatures using inverse modeling with the unfractionated excess air (UA) and closed-system equilibration (CE) model. The …

Maya Migrants And Psychotherapy: Recommendations And A Case Study From Comunidad Sol In Canton, Ohio, Robin Chancer, Gerónimo Ramírez, Ernesto Ajanel Calel, María Ixcoy Mejía

Maya America: Journal of Essays, Commentary, and Analysis

This article approaches the question: How can non-Indigenous mental health practitioners work appropriately with Maya K’iche’ and Ixil communities in the United States? The authors are three Maya leaders and one non-Indigenous psychotherapist, the four of whom have worked together for several years. Psychological treatment rooted in Euro-American paradigms can be minimally helpful—if not harmful—to many Indigenous communities (Dudgeon & Bray, 2016). Traditional approaches such as cognitive-behavior therapy continue the colonial preoccupation with individual pathology and the separation of mind, body, spirit, and nature. The authors suggest that more appropriate approaches would include acknowledging structural oppression and centering the K’iche’ …

From Anorthosite To Silicic Volcanics: Photometry, Composition, And Buoyancy Of Crustal Rock Types On The Moon, Emily Margaret Culley

Arts & Sciences Graduate Student Theses and Dissertations

To better constrain the formation and evolution of the lunar crust, this dissertation addresses two key aspects of lunar crustal formation: the primary feldspathic crust, formed during solidification of an ancient lunar magma ocean (LMO), and non-mare silicic volcanic constructs, which represent either secondary or tertiary crustal formation processes. Specifically, we performed photometry on Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC) images to determine the single-scattering albedo (SSA) of surface features that expose these two non-mare crustal rock types. Using digital terrain models (DTMs) derived from LROC NAC images of each analysis region, we accounted for potential topographic …

An Exploratory Examination Of Profiling Techniques In Criminal Cases, Marilou Verburg Erb

Walden Dissertations and Doctoral Studies

Profiling is a vital process in criminal investigations that facilitates not only the proper identification of offenders in the fight against crime but also the quick apprehension of said individuals. Finding viable techniques to investigate criminal activity has been a significant focus of research on crime and related fields. The objective of this qualitative study was to examine the primary techniques involved in geographic profiling, crime scene profiling, suspect-based profiling, psychological profiling, and psychological autopsies in order to assist academics and professionals in the profiling field as well as law enforcement and criminal justice officials in identifying and apprehending offenders …

Evaluation Of Nibin-Generated Leads And Whether They Contribute To Solving Violent Crimes, Massi Martin

Walden Dissertations and Doctoral Studies

The client organization had not previously analyzed the impact of its NIBIN program. This lack of analysis potentially impeded informed decision-making regarding staffing and resource allocation. The purpose of this study was to address the practice-focused research question: What impact do NIBIN leads have on case closure rates for aggravated assaults and homicides involving firearms? A Cox proportional hazards regression model, a type of survival analysis, was used to analyze the data, which was based on the Locard exchange principle. Data were collected from the organization’s record management system. The findings were that NIBIN leads significantly contributed to faster case …

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Turkish Journal of Veterinary & Animal Sciences

No abstract provided.

The Morphologic Structure Of Some Wing Muscles In The Common Pheasant (Phasianus Colchicus), Beste Demi̇rci̇, Murat Erdem Gülti̇ken

Turkish Journal of Veterinary & Animal Sciences

Avians use significant amounts of energy during flight that is supplied by muscles. The Common Pheasant, a member of the Phasianidae family, can fly swiftly over short distances and flies to evade predators. Pheasant species are terrestrial and have a global distribution. This investigation aimed to analyze the anatomical structure of skeletal muscles in pheasants. A cohort of 20 adult pheasants consisting of an equal number of females and males (10 each) was used. Dissections were performed on 5 females and 5 male pheasants for macroscopic evaluation. The remaining samples underwent immunohistochemical staining using an antimyoglobin antibody to measure the …

Erratum To “Nitrate And Nitrite Le Ate And Nitrite Levels In Cattle F Els In Cattle Feed, Drinking Water Eed, Drinking Water, Rumen , Rumen Content, And Blood Methemoglobin Le Content, And Blood Methemoglobin Levels In Bur Els In Burdur Province Of Vince Of Türkiye”[Turkish Journal Of Veterinary And Animal Sciences 49 (3) 2025 94-101], Reyda Kiyici, Hasan Altan Akkan, Mehmet Karaca, Esra Zeybek, Bayram Kudret Karaayvaz, Fi̇rdevs Mor Savaş, Yahya Öztürk, Asim Kart, Ramazan Yildiz, Murat Bayezi̇t

Turkish Journal of Veterinary & Animal Sciences

We hereby issue this erratum to address a concern regarding Tables 6, 7, and 8 in the manuscript titled “Nitrate and nitrite levels in cattle feed, drinking water, rumen content, and blood methemoglobin levels in Burdur Province of Türkiye”. Some of the numbers in Tables 6, 7, and 8 were misprinted by mistake during the typesetting process. To ensure the accuracy of the published work, the correct tables are included for your reference.

The original article can be accessed at: https://doi.org/10.55730/1300-0128.4376

Effects Of Spent Coffee Grounds On Improvement Of Resistive Switching Characteristics In Natural Rubber-Based Memory, Muhammad Awais, Nadras Othman, Mohamad Danial Shafiq, Feng Zhao, Kuan Yew Cheong

Electrical and Computer Engineering Faculty Research & Creative Works

The recent upsurge in environmental awareness provokes the widespread usage of green materials in sustainable electronic applications. Herein, the effects of spent coffee grounds (SCGs) on natural rubber (NR)-based resistive switching (RS) memory are systematically investigated. This study presents the fabrication of a metal-insulator-metal (MIM) structure using NR incorporated with SCGs (0 to 8 wt.%) as a memristive layer and sandwiched between electrodes. A significant improvement in the ON/OFF ratio from 10⁴ for pure NR to 10⁷, read memory window increased from 2.03 to 2.45 V with improved stability even after 130 cycles of switching is achieved …

An Investigation Of The Association Of Gdf9-C.260g>A Polymorphism With Lamb Live Weight In The Akkaraman Breed, Şeyma Kökkaya, Fadi̇me Daldaban, Davut Bayram, Mehmet Ulaş Çinar, Korhan Arslan, Bi̇lal Akyüz

Turkish Journal of Veterinary & Animal Sciences

In this study, the relationship between the Growth Differentiation Factor-9 (GDF9) gene polymorphism and birth weight, as well as weights on days 30, 60, 90, was investigated in Akkaraman lambs, one of the indigenous sheep breeds of Türkiye. For this purpose, a total of 314 lambs were genotyped by PCR-RFLP method for the single nucleotide polymorphism (SNP) c.260G>A in the GDF9 gene. While GG and GA genotypes were observed in the studied breed, the AA genotype was not observed. The results showed that Akkaraman lambs were in Hardy–Weinberg (H–W) equilibrium for the GDF9-c.260G>A polymorphism (p < 0.05). In this study, a significant association was observed between GDF9-HhaI polymorphism and 30th day weight and 60th day weight in Akkaraman lambs. When the animals were analyzed according to birth type, it was observed that this factor was associated with birth weight, as well as weights on days 30, 60, and 90. It is suggested that the c.260G>A coded SNP …

Bacteria Recovered From Ear Swab Samples Of Cats With Otitis Externa And Their Antimicrobial Resistance Profiles In Kayseri, Türkiye, Emre Karakaya, Doğancan Yarim, Özgür Güran, Cansu Güran, Umut Alpman, İzzet Burçi̇n Saticioğlu, Gülteki̇n Atalan, Seçi̇l Abay, Fuat Aydin

Turkish Journal of Veterinary & Animal Sciences

This study aimed to isolate and identify bacteria from ear swab samples from cats with otitis externa and to detect the antimicrobial resistance profiles of the recovered isolates. For this purpose, ear swab samples from 100 domestic cats that were detected to have otitis externa were used. The samples collected from the animals were inoculated onto 7% defibrinated sheep blood agar and MacConkey agar, and the media were incubated at 37°C for 24-72h under aerobic/microaerobic conditions. The definition of the isolates was carried out by phenotypic tests, MALDI-TOF MS analysis, and 16S rRNA gene sequencing. Antimicrobial susceptibilities of the obtained …

Growth Curve And Serum Calcium And Magnesium Concentrations In Duck Breeders (Anas Boschas) From Hatching To The Prelaying Period Reared Under Subtropical Conditions, Vanessa Peripolli, Fabiano Dahlke, Ellen Karen Dos Santos, Maila Palmeira, Stelamaris Dezen, Robert Lenock, Elizabeth Schwegler, Juahil Martins De Oliveira Júnior, Ivan Bianchi, Paula Gabriela Da Silva Pires, Betina Raquel Cunha Dos Santos, Andressa Fernanda Campos, Fabiana Moreira

Turkish Journal of Veterinary & Animal Sciences

Optimizing duck production requires understanding growth variability and monitoring serum calcium and magnesium levelsas health indicators. This study aimed to analyze the growth curve, mortality, and serum calcium (Ca) and magnesium (Mg) levels in White Mallard ducks from hatching to the prelaying period in subtropical conditions. A total of 1100 females and 270 males were raised for 146 days. At hatch, day 6 (D6), D13, D23, D34, D50, D64, D80, D94, D111, and D146, ducks were weighed separately to assess body weight (BW). Blood samples were collected at hatch, D50, D94, and D146 to determine serum calcium and magnesium levels. …

A Morphological Study On Acanthocephalan Species From Wild Birds In Northern Türkiye, Mehmet Öztürk, Şi̇nasi̇ Umur

Turkish Journal of Veterinary & Animal Sciences

The phylum Acanthocephala contains approximately 1300 acanthocephalan species. So far, only nine acanthocephalan species of wild birds have been reported in Türkiye. To study the context of acanthocephalan diversity in wild birds in Türkiye, we examined 193 birds from 69 species belonging to 16 orders. Acanthocephalans were found in seven bird species: Centrorhynchus aluconis in Buteo buteo and Buteo rufinus, Centrorhynchus spinosus in Buteo buteo and Strix aluco, Mediorhynchus papillosus in Iduna icterina, Mediorhynchus tenuis in Luscinia svecica, Plagiorhynchus cylindraceus in Erithacus rubecula and Turdus merula, Polymorphus contortus in Anas platyrhynchos, and Sphaerirostris turdi in Turdus merula. Except for Plagiorhynchus …

Peer Review Of Open Educational Resource Textbooks, Todd Seguin, Helen Bischoff

The Southeastern Librarian

This article presents an investigation of the state of peer review for Open Educational Resource (OER) Textbooks, which denotes the variability of peer review practices across OER platforms. The environ-mental scan highlights the critical finding that the perception of quality between OER textbooks and commercially published or traditional textbooks is often linked to the presence or absence of a formal, pre-publication peer review process. Findings emphasized a strong preference on behalf of adopters and potential authors of OER textbooks to have a standardized process or guidance for pursuing pre-publication peer review. Thus, there is potential for future researchers, platforms, and …

Rna Gene Expression-Based Liquid Biopsies For Diagnosing Hepatocellular Carcinoma, Balvinder Bobbie Saarsal, Ila Chauhan, Jeevan Divakaran, Shizue Mito

School of Medicine Publications

The incidence of non-alcoholic steatohepatitis, a significant risk factor for hepatocellular carcinoma (HCC), is on the rise, highlighting the urgent need for improved diagnostic biomarkers. To date, no systematic analysis has evaluated international studies using liquid samples to assess the utilization of RNA species as biomarkers for HCC. Liquid biopsies based on RNA expression offer more specific and sensitive diagnostic biomarkers for HCC than alpha-fetoprotein (AFP). The inclusion criteria mandated English-language articles, freely available full texts, and primary research published between January 1, 2019, and May 15, 2024. Quantitative analysis was performed using the area under the receiver operating characteristic …

One Tracer, Dual Platforms: Unlocking Versatility Of Fluorescent Probes In Tr-Fret And Nanobret Target Engagement Assays, Erika Y Monroy, Xin Yu, Dong Lu, Xiaoli Qi, Jin Wang

Faculty, Staff and Students Publications

Target engagement assays are essential for drug discovery, utilizing Time-Resolved Fluorescence Resonance Energy Transfer (TR-FRET) and Nano Bioluminescence Resonance Energy Transfer (NanoBRET) as complementary methods for biochemical and cellular evaluation. Traditional platforms require distinct fluorescent tracers, increasing costs and complexity. This study systematically evaluates the cross-platform performance of T2-BODIPY-FL and T2-BODIPY-589, tracers developed for receptor-interacting protein kinase 1 (RIPK1) target engagement in TR-FRET and NanoBRET applications, respectively. Our results demonstrate both tracers effectively bridge biochemical and cellular assays, providing reliable measurements. T2-BODIPY-589 demonstrates superior performance in NanoBRET (Z’ up to 0.80) and acceptable functionality in TR-FRET (Z’=0.53). Conversely, T2-BODIPY-FL performs …

Advanced Robotic Multimodal Imaging With Real-Time Motion Compensation For Dynamic Structural Health Monitoring, George Papaioannou, Christos Mitrogiannis, Mark Schweitzer, Maria Pappa, Pegah Khosravi, Apostolos Karantanas, Chris Ruberg, Shawn Owens, Nikolaos Michailidis

Publications and Research

Modern composite materials promise superior performance and load-bearing capabilities, yet evaluating their structural integrity remains challenging. Current testing methods, such as visual, thermographic, ultrasonic, optical, electromagnetic, terahertz, shearography, X-ray, and neutron imaging, are hampered by long scan durations, limited field of view, suboptimal accuracy, and high costs, particularly when applied to large structures.

This paper addresses these issues by introducing a novel robotic multimodal imaging system that overcomes the limitations of traditional methods. This system dynamically captures both static and dynamic properties of materials using advanced motion compensation techniques. By integrating multiple radiographic modalities into a coordinated robotic platform, it …

Genome Sequences Of Eight Fusobacterium Watanabei Sp Isolates, Martha A Zepeda-Rivera, Falk Ponath, Kaitlyn N Lewis, Rutika P Gavate, Floyd E Dewhirst, Junko Tomida, Yoshiaki Kawamura, Kaori Tanaka, Susan Bullman, Christopher D Johnston

Faculty, Staff and Student Publications

We report draft genome sequences of eight Fusobacterium watanabei clinical isolates, ranging from 1.95 to 2.09 Mbp. Analysis against the Genome Taxonomy Database indicates that F. watanabei genomes are part of the "Fusobacterium nucleatum_J" group.

“Of Their Women We Hear Less”: Pride And Prejudice In The Tale Of ‘Aldarion And Erendis.’, Sara Brown

Journal of Tolkien Research

In discussing J.R.R. Tolkien’s Second Age “Tale of the Mariner’s Wife,” past scholars have used descriptors such as ‘resentful’, ‘strong-willed’, ‘unhappy’ – even ‘misandrist’. There can be no doubt that this is a story of a deeply unhappy marriage between two people with irreconcilable differences, to use the modern parlance of the divorce courts, but it would also be true to say that Erendis seems to come out of the narrative with a more sullied reputation than her husband. In fact, Aldarion appears to have everything he could have wanted, such as his freedom to sail and an heir for …

Passive Precision Alignment For Thin-Panel Deployable Space Systems, Jake Sutton, Trevor Carter, Brooklyn Olson, David Wing, Fisk Lungreen, Larry Howell, Nathan Usevitch, Spencer Magleby, Mark Stephen

Small Satellite Conference

Optical satellite performance improves with increased surface area, which enhances light capture and sensor input. Deployable mechanisms allow satellites to remain compact during launch and expand in orbit but the large relative motion during deployment makes it difficult to achieve precision alignment in the final deployed state. This study focuses on designing passive hinges in rigid-panel origami-based deployable satellites for optical applications. A novel kinematic coupling method is developed, incorporating magnets, compact Lamina Emergent Torsional (LET) joints, and principles from Maxwell couplings. This system autonomously achieves alignment without motorized actuation. The design process involved iterative testing of ten two-panel hinge …

A Ka Band High Data Rate Transmitter For Leo Satellites Design And System Simulation, Jean-Hervé Corre, Ronan Foubert, Thomas Dehaene, Hugo Hartmann, Yann Prigent, Bertrand Lechevalier

Small Satellite Conference

This paper addresses the design of a high-throughput Ka-band transmitter for LEO satellites. This article particularly focuses on RF and microwave subsystems and system simulation.

The purpose of this transmitter (named KaLLISTO) is to operate the downlink from a LEO satellite to a ground station. High data rates are required to meet the expressed demand from satellite operators to enable much more data volume downlink. The equipment is the latest state-of-the-art qualified COTS based design. This design is perfectly adapted to New-Space programs, where cost effectiveness, performance and reliability are key factors. The allocated band goes from 25.5 to 27GHz …

Stari: Starlight Acquisition And Reflection Toward Interferometry, John D. Monnier, James Cutler, Michael Meyer, Caden Burkhardt, Akshat Dubey, Jacob Klingler, Raven St. Clair, Shivani Sunil, Daniil Voloshin, Leonid Pogorelyuk, Melissa Flores, Albert Ostoja-Starzewski, Simone D'Amico, Ethan Foss, Prachet Jain, Antonio Rizza, E. Glenn Lightsey, Althea Noonan, Kerri Cahoy, Gautam Vasisht

Small Satellite Conference

We introduce the NASA-funded mission STARI (STarlight Acquisition and Reflection toward Interferometry). We plan to demonstrate the first transfer of starlight between two separate spacecraft, a key technology step towards long-baseline interferometry. Consisting of two propulsive 6U CubeSats flying in Low Earth Orbit separated by ∼100 meters, STARI will reflect a small beam of starlight from the Chief spacecraft toward the Deputy spacecraft, where the light will be collected by an off-axis parabola and focused into a single-mode fiber. With the use of differential Global Positioning System (GPS), visual LED beacons and fast-steering-mirrors (FSMs), we aim for continuous high-throughput fiber …

Spacecraft-Initiated Scheduling Of Ground Stations: On-Orbit Results From Techedsat-11, Adam Gannon, Timothy Recker, Lucas Shalkhauser, Rachel Dudukovich, Janette Briones, Alejandro Salas, Malachi Mooney-Rivkin, Marcus Murbach

Small Satellite Conference

The commonplace practice of manually scheduling communications is challenged by complex and often unpredictable data needs of modern spacecraft. Automation has clear benefits to improve timeliness and efficiency of space communications. In this work we describe and experimentally demonstrate a suite of software which automates the process of scheduling contacts for satellite communications. Service is scheduled based on a spacecraft’s needs and contacts execute automatically without a human in the loop. Requests for service originate onboard the spacecraft, traverse a low-rate control channel to reach a terrestrial server, and are fulfilled by ground station assets. This work describes an experiment …

Poundmaker – A Legacy Of Leadership, Love And Conciliation, Andrew J. Karesa

Indigenous Business & Public Administration

Chief Poundmaker was a foundational figure in early Canadian history. He was responsible for unifying warring nations into cohesive alliances that advocated for fundamental and inherent Indigenous rights. Throughout his life, his dedication was to his people and their overall well-being, even when it stood against his own personal well-being. This research expands on leadership theory through a case study of the life of Chief Poundmaker. His life exemplifies relational and servant leadership, which an individual can extrapolate into profound leadership lessons. By learning about Chief Poundmaker’s life and leadership journey, contemporary leaders can effectively learn how to lead through …

Optical Inter-Satellite Link Demonstration On Cubesats - Update On The Cubeisl-Iod Mission, Benjamin Rödiger, Jorge Rosano Nonay, Arvind Kumar Balan, Alberto Rodríguez Pérez-Silva, José Franciso Briz Valero, Cristóbal Nieto Peroy

Small Satellite Conference

Free-space optical communication has become a mature technology to extend and replace classical radio channels for data transmission from satellites to the Earth. The advantages of high data throughputs, resilience against electromagnetic disturbances and its robustness against jamming spoofing and eavesdropping makes laser communication attractive for governmental, defense authorities and commercial users. To enable global connectivity and interoperability beyond the line of sight, inter-satellite links are required and therefore terminals with high data rates are necessary to avoid communication bottlenecks. Size weight and power limitations on spacecraft demand highly efficient and miniaturized payloads, especially for use cases on smallest satellites. …

Deployable Diffractive Optical Elements For Small Satellite Lidar Missions, Adam Bahlous-Boldi, Leila Freitag, Amber Cooper, Mary Dahl, Afreen Siddiqi, John Leckey, Kerri Cahoy

Small Satellite Conference

SPECIES (Smart Polyimide Expandable Collector to enable Investigations for Earth Science) is a NASA Earth Science Technology Office (ESTO) project that explores the use of a deployable diffractive optical element (DOE) in a space-based lidar instrument for a 12–24U CubeSat operating in low Earth orbit (LEO). The DOE, a 0.6-meter hybrid multi-level Fresnel zone plate, is made using a tessellation of hexagonal molds, each with a unique number of diffractive levels. It is stowed for launch and deployed on orbit using a 3 meter long extendible boom, which positions the optic at the correct distance from the spacecraft, while guy …

Pulse-A Mission Overview: Optical Communications For Undergraduate Students, Logan Hanssler, Seth Knights, Graydon Schulze-Kalt, Juan Ignacio Prieto Asbun, Robert Pitu, Lauren Ayala, Rohan Gupta, Vincent Redwine, Spencer Shelton, Catherine Todd, Maya Mcdaniel, Sofia Mansilla, John Baird, Mason Mccormack, Leah Vashevko, Tian Zhong, Michael Lembeck

Small Satellite Conference

Recent advances in the size, weight, and power (SWaP) requirements for space-based sensing have dramatically increased the demand for high-bandwidth downlink. However, high data rate RF transceivers still pose significant SWaP and cost restrictions, especially for university-class CubeSat missions. Optical communication may provide a solution to this challenge, enabling data transmission with order-of-magnitude rate increases over RF while being both secure and SWaP-efficient. The Polarization-modUlated Laser Satellite Experiment (PULSE-A) is a University of Chicago mission to demonstrate optical downlink at a data rate of up to 10 Mbps using circular polarization shift keying (CPolSK). PULSE-A comprises a < 1.5U Optical Transmission Terminal, 3U CubeSat Bus, Optical Ground Station (OGS) employing an amateur telescope, and RF Ground Station (RFGS), all of which are being designed and integrated by a team of over 60 undergraduate students. The mission objective is threefold: (1) to provide hands-on educational experiences for undergraduate students, (2) to make hardware for optical communication systems more accessible via open-source design, and (3) to explore the viability and potential advantages of using CPolSK for optical downlink.

PULSE-A serves an …

Pulse-A Mission Overview: Optical Communications For Undergraduate Students, Logan Hanssler, Seth Knights, Graydon Schulze-Kalt, Juan Ignacio Prieto Asbun, Robert Pitu, Lauren Ayala, Rohan Gupta, Vincent Redwine, Spencer Shelton, Catherine Todd, Maya Mcdaniel, Sofia Mansilla, John Baird, Mason Mccormack, Leah Vashevko, Tian Zhong, Michael Lembeck

Small Satellite Conference

Recent advances in the size, weight, and power (SWaP) requirements for space-based sensing have dramatically increased the demand for high-bandwidth downlink. However, high data rate RF transceivers still pose significant SWaP and cost restrictions, especially for university-class CubeSat missions. Optical communication may provide a solution to this challenge, enabling data transmission with order-of-magnitude rate increases over RF while being both secure and SWaP-efficient. The Polarization-modUlated Laser Satellite Experiment (PULSE-A) is a University of Chicago mission to demonstrate optical downlink at a data rate of up to 10 Mbps using circular polarization shift keying (CPolSK). PULSE-A comprises a <1.5U Optical Transmission Terminal, 3U CubeSat Bus, Optical Ground Station (OGS) employing an amateur telescope, and RF Ground Station (RFGS), all of which are being designed and integrated by a team of over 60 undergraduate students. The mission objective is threefold: (1) to provide hands-on educational experiences for undergraduate students, (2) to make hardware for optical communication systems more accessible via open-source design, and (3) to explore the viability and potential advantages of using CPolSK for optical downlink.

PULSE-A serves an …