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…as they must remain mutually indistinguishable: a fragile condition that is hard to maintain within the technically demanding framework of a space mission, which includes a rocket launch, strong thermal drifts, and radiation. This is why quantum states of light, though already generated and transmi…
…value function and derive sufficient MPC horizon conditions, together with sample complexity bounds, for achieving a prescribed relative error. Numerical experiments on a rocket landing task validate the theoretical predictions and demonstrate near-optimal performance. ▽ More We study data-driven p…
…research system that identified eight independently reproduced, attacker-reachable vulnerabilities in BlueZ and directed the design, simulation, and fabrication of a ten-foot rocket intended to land propulsively using non-throttleable solid motors. Together, these results show that process-level sc…
The primary challenge of rocket propulsion is the burden of accelerating the spacecraft's own fuel. Light sails leave the propellant at home, with the achievable speed set by the sail area, the thermal tolerance of its material, and the power of the driving array. In GL15 we showed that leakage from…
We introduce ROCKETS (Rocket-driven Cluster Kinematics & Triggered Star-formation), a Gaia based programme investigating kinematic fingerprints of stellar feedback or rocket effect in young star forming regions. We analyse two young clusters with O-type stars enclosed by mid-… ▽ More We introduce RO…
Photometric observations of satellites, rockets and space debris brighter than magnitudes 6.0, 7.0 and 8.0 are characterized. Those magnitudes pertain to different levels of interference with astronomy as defined by the International Astronomical Union. The densities of objects per square degree of …
…of arbitrary sign. These metrics describe "photon rockets" with point, string, and sheet sources moving through spacetime while emitting null radiation. For $Λ\neq 0$, we use criteria for the existence of gravitational radiation based on the asymptotic super-Poynting vector. For point sources, we e…
…surprising results due to the mismatch between the resulting quadratic term and the cubic term in the equations of motion. This leads to a corresponding modification of the rocket equation itself. A Birkhoff-theoretic solution to an illustrative cislunar space mission problem shows propellent savin…
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Approved. For Release 2006/111 - P~ p 1495F 2 3 SEP 1965 MEMORANDUM 'OR. Assistant Deputy Director for Plano 4.As~sia#.ant .Deputy Director for Intelligence Executive Officer for the Deputy Director for Science and Technology Assistant Deputy Director for Support SUBJECT z Procurement of Publication…
107 pages : 20 cm Pugly is a pug with aspirations and dreams. While his owner is at school, he bakes cakes, builds space rockets and solves crimes. Things never go entirely to plan, though
Includes index Examines different types of machines used in space exploration, including probes, satellites, space shuttles, and rockets, and describes the work that they do
48 p. 28 cm
287 p. : 24 cm Reprints of comics written and drawn by Gilbert Hernandez between 1982 and 2003, tracing the lives of the residents of the mythical Latin American village from the arrival of Luba, the guiding material spirit of Palomar, to her departure twenty years later Chelo's Burden - Heartbreak …
388 pages ; 18 cm Forced to flee after killing a man who was beating a horse, Juan the Lépero, who hides his mixed heritage to escape life as a beggar, embarks on a series of adventures as a highwayman, horse thief, and wealthy caballero before resolving to rescue a man who once saved his life "A T…
24 pages : 23 cm "These fabulous books are a must for any young reader with an interest in vehicles and machines. Each book is filled with amazing machines, fun facts, jokes, and age-appropriate text in colorful boxes. This book takes a close look at machines that can fly including super jumbo jets,…
Space biology is a young and rapidly developing discipline comprising basic research and biotechnology. In the next decades it will play a prominent role in the International Space Station (ISS). Therefore, there is an increasing demand for sophisticated instrumentation to satisfy the requirements o…
The coupling thermal and mechanical effect on submerged nozzles is important in the design of modern rockets upon thermal loading and aerodynamic pressure. In this paper, a simulation with the subroutine of nonuniform pressure and nonuniform heat transfer coefficient was conducted to study the therm…
In the last decades, critical systems have increasingly been developed using computers and software even in space area, where the project approach is usually very conservative. In the projects of rockets, satellites and its facilities, like ground support systems, simulators, among other critical op…
During the last decade, the world faced the mass insertion of small satellites in the space technology scenario. Every year, the number of micro and nanosatellites launched increases and gets more attention from players in the space market. Despite the lack of a national launcher, the Brazilian Spac…
Composite propellants used in solid-fuel rockets commonly consists of an oxidizer, the most used being ammonium perchlorate, fuels such as powdered aluminum, compounds that control the burn rate (catalysts or inhibitors), and various other additives [...]
In this study; we screened seven essential oils and 8 different plant extracts for fungitoxic effect against three soil borne pathogens infect sugar beet. The seven essential oils were from commercial products derived from Camphor, thyme, anise, lettuce; groundnut, rocket and caraway oil and used in…
A new tool named mesosonde was developed by using a large-scale gun for ionospheric and meteorological research purpose. Type "MSL-160" gun has a size of 155 mm in caliber and 13 m in length. An apogeeof 12 kg weight of payload is about 120 km. In comparison with small rockets, one of the main chara…
Understanding the impact-induced deformation and ignition properties of high-ductility composite energetic material (CEM), including high-energy propellants and casted high explosives, is fundamental to the safety design and usage of rockets and warheads and has been a broad concern in the fields of…
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Rockets operate based on Newton's laws of motion. Simply put, rocket engines eject high-pressure and high-temperature gases resulting from the combustion of fuel through a nozzle. The rapid expulsion of gases from the nozzle propels the rocket forward.
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
We’re not joking. In 2025 and 2026 our university rocketry team launched several high-powered 12ft tall competition rockets with a custom Python-based process manager framework that controlled all of our rocket telemetry and ground control systems. We called it the Ground Control Station, or G…
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Solid rockets were created by accident and their design and uses have evolved over time. Solid rockets are more simple and reliable than liquid rockets, but they have reduced performance capability. All solid rockets have a similar set of failure modes.
Solid rockets are of interest to the space program because they are commonly used as boosters that provide the additional thrust needed for the space launch vehicle to escape the gravitational pull of the Earth. Larger, more advanced solid rockets allow for space launch vehicles with larger payload …
Sounding rockets for transporting scientific instruments in nearly vertical trajectory
We propose a conceptual study of prototype strained hydrocarbon molecules as high energy density additives for hybrid rocket fuels to boost the performance of these rockets without compromising safety and reliability. Use of these additives could extend the range of applications for which hybrid roc…
Perigee propulsion for orbital launch of nuclear rockets
Accurate prediction of micro-motion characteristics is essential to the success of space mission operations. In this paper, the lightweight spacecraft is selected as the research object. Firstly, the micro-motion characteristic test device is designed to carry out the micro-motion experiment, and th…
Small sounding rockets provide an accessible, cost-effective platform for education and experimental research, especially at universities. In such projects, the onboard computer (OBC) is essential to mission reliability. It is responsible for sensor data acquisition, real-time flight-state detection…
Space launch costs have fallen dramatically over the past six decades, opening new economic and scientific frontiers. Yet precise, long-term estimates of these cost reductions remain sparse, and the underlying rate of technological learning is poorly understood. We introduce the largest standardized…
In cognition, response times and choices in decision-making tasks are commonly modeled using Drift Diffusion Models (DDMs), which describe the accumulation of evidence for a decision as a stochastic process, specifically a Brownian motion, with the drift rate reflecting the strength of the evidence.…
Current space transportation employs a multistage rocket system to deliver the payload to its destination in a single launch, and this integrated model significantly constrains payload capacity for medium-high earth orbits and deep-space missions. However, the medium-high earth orbits and deep-space…
<h4>Background</h4>Osteochondral allograft transplantation (OCA) has been established as a viable restorative chondral procedure, although few studies have examined its effectiveness in the setting of anterior cruciate ligament (ACL) reconstruction.<h4>Purpose</h4>To compare self-reported function a…
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