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Articles 523621 - 523650 of 5212262
Full-Text Articles in Entire DC Network
Full Issue
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
No abstract provided.
Contributions Of Farms Members Still Crucial
Contributions Of Farms Members Still Crucial
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
As FARMS has become part of Brigham Young University, some of the faithful members of FARMS have asked if their support is still important to the Foundation. The answer is a resounding yes! Just in the financial area alone, membership fees (which we have also called subscriptions) are crucial to the research and publications of the Foundation. The university contributes less than 20 percent of the Foundation's annual operating budget-a very welcome contribution, but obviously not enough to keep FARMS and its projects running. We still must rely on membership fees, donations, and the sale of publications to support ongoing …
Nibley Fellows A Fruitful Investment
Nibley Fellows A Fruitful Investment
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
Each year FARMS grants fellowships in the name of Hugh Nibley to promising graduate students pursuing advanced degrees in fields of particular interest to FARMS. Three of these rising scholars have since earned doctoral degrees and received appointments at BYU and FARMS. They have already published material through FARMS as Nibley Fellows, and they are now in a position to make further contributions to the work of FARMS.
Lectures Spotlight New Research
Lectures Spotlight New Research
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
Since the beginning of the year, nine FARMS brown bag lectures have kept attendees abreast of new developments in ancient research.
The "Lamb Of God" In Pre-Christian Texts, John W. Welch
The "Lamb Of God" In Pre-Christian Texts, John W. Welch
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
One of Nephi's favorite titles for Jesus Christ was "the Lamb of God." Forty-four references to "the Lamb" appear in Nephi's vision in 1 Nephi 11-14 alone. Aside from the Latter-day Saint understanding of a similar reference in Moses 7:47 and perhaps Isaiah 53:7, what evidence supports the Old World origins of this terminology?
Ten Major Studies Reprinted
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
FARMS has selected ten papers from among the many interesting and significant contributions to Book of Mormon scholarship and ancient studies published in the last five years. These articles, now available for the first time as separate reprints in the hope they will be read and discussed widely, shed valuable light on the translation, ancient origin, and authenticity of the Book of Mormon and on related matters of language, culture, and doctrine.
A Scientific Look At The Cataclysm In 3 Nephi
A Scientific Look At The Cataclysm In 3 Nephi
Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship
As a sign of the Savior's crucifixion, a three-hour cataclysm in the Americas erased entire cities, enshrouded the land in three days of darkness, and transformed "the face of the whole earth" (3 Nephi 8:17). Thanks to an illuminating study by a BYU geologist, certain anomalous aspects of that massive destruction now are understood better than ever before.
Drag-Based Formation Control Of Millennium Space Systems Satellites, Sanny Omar
Drag-Based Formation Control Of Millennium Space Systems Satellites, Sanny Omar
Small Satellite Conference
Aside from gravity, aerodynamic drag is typically the strongest environmental force acting on a spacecraft in low Earth orbit. While often treated as a disturbance whose perturbative effects on the orbit must be mitigated through periodic thruster burns, drag can potentially be harnessed for on-orbit maneuvering.
This paper discusses a practical algorithm for achieving and maintaining a desired separation between two satellites using differential aerodynamic drag. By increasing the drag and thereby reducing the mean semi-major axis of “lead” vehicle, the separation between the satellites is increased. Conversely, by increasing the relative drag on the “chase” vehicle, inter-satellite separation is …
Development Of An Autonomous Distributed Fault Management Architecture Forspacecraft Formations Involving Proximity Operations, Antoine Paletta, Ebenezer Arunkumar, Glenn Lightsey
Development Of An Autonomous Distributed Fault Management Architecture Forspacecraft Formations Involving Proximity Operations, Antoine Paletta, Ebenezer Arunkumar, Glenn Lightsey
Small Satellite Conference
CubeSat formations have been identified as a new paradigm for addressing important science questions but are often early adopters of new technologies which carry additional risks. When these missions involve proximity operations, novel fault management architectures are needed to handle these risks. Building on established methods, this paper presents one such architecture that involves a passively safe relative orbit design, interchangeable chief-deputy roles, a formation level fault diagnosis scheme, and an autonomous multi-agent fault handling strategy. The primary focus is to enable the reliable detection of faults occurring on any formation member in real time and the autonomous decision making …
Cubesat Proximity Operations Demonstration (Cpod) Mission Results, Isaac A. Spiegel, Bonan Zhou, Robert Goodloe, Brian Fox, Jeremiah Dimatteo
Cubesat Proximity Operations Demonstration (Cpod) Mission Results, Isaac A. Spiegel, Bonan Zhou, Robert Goodloe, Brian Fox, Jeremiah Dimatteo
Small Satellite Conference
CubeSat rendezvous and proximity operation (RPO) technology development is critical for improving the performance and economics of space debris remediation and the inspection, servicing, and assembly of larger space systems. The CubeSat Proximity Operations Demonstration (CPOD) is a program led by Terran Orbital and funded by NASA to achieve autonomous on-orbit RPO with two identical 3U CubeSats, thereby maturing CubeSat RPO technology. This article presents the CPOD RPO guidance architecture and its on-orbit outcomes. The architecture advances the autonomy, fuel-efficiency, and safety of CubeSat RPO through the synthesis of optimization-based control theory and orbital dynamics analysis, with different optimization techniques …
Examination Of The Application Support Layer Of Ccsds Sois Using Spacewire Communication Stack And Low-Code User Application, Mitsutaka Takada, Hiroaki Takada, Takayuki Ishida, Keiichi Matsuzaki
Examination Of The Application Support Layer Of Ccsds Sois Using Spacewire Communication Stack And Low-Code User Application, Mitsutaka Takada, Hiroaki Takada, Takayuki Ishida, Keiichi Matsuzaki
Small Satellite Conference
As a SmallSat grows, there is an increasing need for high-speed and high-functioning sub-networks, such as SpaceWire, to connect equipment to the OBC and store large amounts of optical image data. SpaceWire has the ability for time-sensitive delivery, fast communication, and flexible network topology construction.
JAXA/ISAS has developed SIB2, a low-code user application that designs telemetry commands based on a database stored on the satellite. SIB2 has a code generation function called SIB2Generator, which outputs code that performs the behavior of telemetry commands during sender/receiver and is used as a template for user applications. On the other hand, the Application …
Propellant Variety And Affordability: A Strength Of Pulsed Cathodic Arc Propulsion Systems, Patrick R. C. Neumann, Steven Despotellis, Hervé Astier
Propellant Variety And Affordability: A Strength Of Pulsed Cathodic Arc Propulsion Systems, Patrick R. C. Neumann, Steven Despotellis, Hervé Astier
Small Satellite Conference
Most spacecraft propulsion systems require specific propellants with stringent quallity requirements. Examples include high purity xenon, krypton or argon used by many Hall and ion thrusters, where propellant contamination can corrode parts of the thruster, in particular the neutraliser cathode, leading to thruster failure[1]. The same is true in most chemical thrusters, which often require not only high propellant purity, but filtration to prevent particulate intrusion [2].
Propellant purity requirements lead to availability restrictions, which impacts propellant pricing. The standard defining RP-1, the refined kerosene derivative utilised in many launch vehicles, stipulates such stringent composition requirements that only petroleum sourced …
Solving Long Lead Times And The High Cost Of Space Solar Panels With Upgraded Silicon Technology, S. Herasimenka, M. Reginevich, M. Rosenzweig, S. Bowden, N. Honesty, M. Eyink, A. Fedoseyev
Solving Long Lead Times And The High Cost Of Space Solar Panels With Upgraded Silicon Technology, S. Herasimenka, M. Reginevich, M. Rosenzweig, S. Bowden, N. Honesty, M. Eyink, A. Fedoseyev
Small Satellite Conference
Solestial is developing 100% US made solar cells and blankets with > 18% BOL efficiency, over 10 years lifespan, < 3% annual degradation rate, < 400 g/m2 specific mass, > 10 MW manufacturing capacity and $20/W price by 2025. This new solar technology will be beneficial for the projects where high cost, long lead times and low manufacturing capacity of space-grade solar cells and panels are the major barriers for implementation. Here we describe the main features of our solar cells and blankets.
Production Of Deployable Helical Antennas, Hannah Frost, Aloisia Russo, Angelika Skrzynska, Thomas Norton, Amool Raina, Vincent Fraux, Juan Castillo, Joao Silva
Production Of Deployable Helical Antennas, Hannah Frost, Aloisia Russo, Angelika Skrzynska, Thomas Norton, Amool Raina, Vincent Fraux, Juan Castillo, Joao Silva
Small Satellite Conference
Goal
To develop new manufacturing processes and capabilities for batch production of deployable helical antennas for small satellite constellations.
Improved Satellite Robustness Through Application Of Erosion Resistance And High Emissivity Coatings, Rajeswaran Radhakrishnan, Timothy D. Hall, Danny Liu, Maria Inman, Stephen Snyder, Matthew Robertson, Trace Taylor, J.R. Dennison
Improved Satellite Robustness Through Application Of Erosion Resistance And High Emissivity Coatings, Rajeswaran Radhakrishnan, Timothy D. Hall, Danny Liu, Maria Inman, Stephen Snyder, Matthew Robertson, Trace Taylor, J.R. Dennison
Small Satellite Conference
- Spacecraft can experience charging throughout operation due to high flux of incident electrons (ex. during geomagnetic substorm). As a result, different materials/components may experience a range of potentials which may lead to plasma-induced arcs, damaging spacecraft components.
- 54% of spacecraft failures are due to enhancement of radiation belt particles and magnetospheric plasma that cause charging/discharing
- Current space charge mitigation technologies:
- Metallic coatings
- System chassis ground leads to as many surfaces as possible
- Not effective in severe sub-storm conditions and do not enable local application of coating
Itasat-2: Conops Review And Near-Term Challenges, Lidia Hissae Shibuya Sato, Luis Eduardo Loures Da Costa, Tiago Matos, Ana Carolina Di Iorio Jeronymo, Renan Guilherme Soares Menezes, Douglas Estevam Casale, Bruno Leonardo Schuster, Denis Guilgim Vieira, Charles Swenson, Bela Fejer
Itasat-2: Conops Review And Near-Term Challenges, Lidia Hissae Shibuya Sato, Luis Eduardo Loures Da Costa, Tiago Matos, Ana Carolina Di Iorio Jeronymo, Renan Guilherme Soares Menezes, Douglas Estevam Casale, Bruno Leonardo Schuster, Denis Guilgim Vieira, Charles Swenson, Bela Fejer
Small Satellite Conference
ITASAT-2 is a Brazil-United States mission to study ionospheric phenomena that occur in low orbit and to develop and demonstrate capabilities in geolocation. Brazil will be responsible for the spacecraft development, integration and testing of the CubeSat and the US partners will provide the space weather payloads. The geolocation payload and radiation measurement instrument is intended to be provided by Brazil partners. To be able to accommodate the expected payloads and the required subsystems a 12 U CubeSat is foreseen. This works presents the ongoing work of ITASAT-2 mission covering the Concept of Operation and expected challenges identified for mission …
Surrogate-Based Smallsat Architecture Design Leveraging Integrated Parametric Mission Models, Allen Wautlet, Greg Thanavaro, Ben Renkoski
Surrogate-Based Smallsat Architecture Design Leveraging Integrated Parametric Mission Models, Allen Wautlet, Greg Thanavaro, Ben Renkoski
Small Satellite Conference
The modern space mission landscape requires consideration of many trade variables to meet growing cost and performance constraints. In the defense sector, threats continue to proliferate, driving the need for multi-layered constellations that are robust to myriad potential conflicts. In the civil sector, stakeholders seek science data with ever increasing timeliness, coverage, and resolution to monitor the pulse of Earth's changing environment. Across the commercial arena, companies compete to deliver the best space products and services, bringing cutting edge business opportunities into the realm of possibility for the first time. Now more than ever, all three sectors demand optimal mission …
Development Of Water Gridded Ion Thruster For Small Satellites: Toward On-Orbit Demonstration, Pierre Ominetti, Daiki Tomita, Akira Iwakawa, Yuichi Nakagawa, Kazuya Yaginuma, Jun Asakawa
Development Of Water Gridded Ion Thruster For Small Satellites: Toward On-Orbit Demonstration, Pierre Ominetti, Daiki Tomita, Akira Iwakawa, Yuichi Nakagawa, Kazuya Yaginuma, Jun Asakawa
Small Satellite Conference
Water as a propellant has many advantages and does not require a pressure vessel for storage. Its high safety level can reduce development cost and time. It is also a resource tightly tied to human spaceflight and found in-situ in the upcoming moon missions.
Stored in its liquid state in our thrusters, it is then vaporized at room temperature and low pressure. The resulted steam is then injected in the discharge chambers where it is transformed into plasma. Plasma generation is achieved through flight-proven microwave discharge using Electron Cyclotron Resonance.
The First Kuwait National Satellite Project - Kuwaitsat-1, Ali Meerza, Danah Alotaibi, Maha Alkharji, Sara Eskander, Albandary Alotaibi, Hanen Alotaibi
The First Kuwait National Satellite Project - Kuwaitsat-1, Ali Meerza, Danah Alotaibi, Maha Alkharji, Sara Eskander, Albandary Alotaibi, Hanen Alotaibi
Small Satellite Conference
Nanosatellites present many opportunities and enable many nations and organizations to participate in the space field. The affordability of these satellites offers a short-term strategy for developing space systems capability. The first Kuwaiti satellite project known as "KuwaitSat-1" started back in 2019 and it was initiated by Kuwait University and funded by Kuwait Foundation for the advancement of Sciences (KFAS). Kuwaitsat-1 is a 2U nanosatellite with an imager payload in the visible light (RGB) and it was Launched on January 3rd, 2023, by Space-x, falcon 9, Transporter 6. The main objective of Kuwait Sat-1 project is to provide the students …
Leveraging Virtualization For Space-Based Edge Remotes, Jennifer Barber, Chris Badgett
Leveraging Virtualization For Space-Based Edge Remotes, Jennifer Barber, Chris Badgett
Small Satellite Conference
No abstract provided.
A Scalable System For Producing Market-Ready Earth Observation Data From Smallsats, Thinus Prinsloo
A Scalable System For Producing Market-Ready Earth Observation Data From Smallsats, Thinus Prinsloo
Small Satellite Conference
Small satellites pose unique challenges when it comes to producing high-quality imagery at scale:
- Smaller budgets
- Rapid integration
- Must be automated
- Per-product quality metrics
- Heterogeneous satellites, sensors, and band combinations
- Traditional quality measurements not feasible
Accelerating New Space Innovation From Design To Operations: The Optimized Journey Of Space Access, Jason Roberson
Accelerating New Space Innovation From Design To Operations: The Optimized Journey Of Space Access, Jason Roberson
Small Satellite Conference
To win the space race with successful satellite launches, companies must close the gap between the real and virtual worlds.
This enables them to manage a complex system of systems through effective collaboration, innovation and program execution. Here's how the optimized journey through the whole project lifecycle looks like.
In Space, Security Can No Longer Be Based On Trust: Secure & Trusted Space Orchestration, John Moberly, Matthew Erickson
In Space, Security Can No Longer Be Based On Trust: Secure & Trusted Space Orchestration, John Moberly, Matthew Erickson
Small Satellite Conference
The biggest threat to US space capability is not foreign adversaries–it is a potential attack on the networks that keep us connected. Unfortunately, many satellites were designed in an era when cyber threats were not such a concern. The Pentagon's traditional method of defining program-specific requirements, redirecting budgets, and embarking on a five-year development trek is slowly catching up but SpiderOak's OrbitSecure can accelerate this by meeting urgent mission needs for new capabilities as well as retrofitting existing systems which SpiderOak recently proved on-orbit.
Complete Issue - Vol. 81, No. 1 And 2
Complete Issue - Vol. 81, No. 1 And 2
Journal of Mississippi History
No abstract provided.
Kirk Fordice (1992-2000): Cutting Against The Grain, Andy Taggart
Kirk Fordice (1992-2000): Cutting Against The Grain, Andy Taggart
Journal of Mississippi History
No abstract provided.
Cliff Finch (1976-1980) And The Limits Of Racial Integration, Chris Danielson
Cliff Finch (1976-1980) And The Limits Of Racial Integration, Chris Danielson
Journal of Mississippi History
No abstract provided.
Master Of Racial Myths And Massive Resistance: Governor Paul B. Johnson Jr. (1964-1968), Patricia Michelle Boyett
Master Of Racial Myths And Massive Resistance: Governor Paul B. Johnson Jr. (1964-1968), Patricia Michelle Boyett
Journal of Mississippi History
No abstract provided.
James P. Coleman (1956-1960) And Mississippi Poppycock, Robert Luckett
James P. Coleman (1956-1960) And Mississippi Poppycock, Robert Luckett
Journal of Mississippi History
No abstract provided.
Fielding L. Wright (1946-1952): Legacy Of A White-Supremacist Progressive, James Patterson Smith
Fielding L. Wright (1946-1952): Legacy Of A White-Supremacist Progressive, James Patterson Smith
Journal of Mississippi History
No abstract provided.
Race And Wartime Politics During The Administration Of Governor Thomas L. Bailey (1944-1946), Charles C. Bolton
Race And Wartime Politics During The Administration Of Governor Thomas L. Bailey (1944-1946), Charles C. Bolton
Journal of Mississippi History
No abstract provided.