Here are a few key points about what it's like to work as a rocket scientist:
- Challenging but rewarding work. Rocket science involves solving complex engineering problems related to propulsion, aerodynamics, materials science, and more. It takes creativity and perseverance to overcome technical challenges. But seeing rockets launch successfully is extremely satisfying.
- Cutting-edge technology. Rocket scientists are working at the forefront of technology, developing new propulsion systems, materials, navigation/guidance systems, and more. It's an exciting field with constant innovation.
- Attention to detail. Rockets have no room for error, as mistakes could be catastrophic. Rocket scientists must meticulously analyze designs, test components, and ensure
A brief history of chemical rocket engines (thrusters) for spacecraftAkira Kakami
This slide addresses chemical thruster on spacecraft and its history. A newer version with correction and addition is available: https://sites.google.com/view/akira-kakami/home
1. The document discusses using positrons, the antimatter counterpart to electrons, for propulsion applications through a process called positron energy conversion. Positrons annihilate with electrons to release tremendous energy that could potentially power aircraft or spacecraft.
2. It outlines the basic technology required, including moderating positrons, confining them electromagnetically, and using the heat from annihilation reactions. Simulations showed this could power ramjet or rocket engines.
3. Previous research at Lawrence Livermore National Laboratory demonstrated nuclear-powered ramjet technologies in the 1960s, providing proof of concept for antimatter propulsion ideas. Further research aims to develop the capability to produce, moderate, and store sufficient positrons for experiments
Presentation on energy iter2017 januaryCooper Lackay
This document provides an overview of nuclear fusion and the ITER (International Thermonuclear Experimental Reactor) project. It describes how ITER aims to demonstrate the scientific and technological feasibility of fusion power by producing 500 megawatts of power sustained for long periods using the tokamak design. Key challenges for ITER include materials issues from high heat and particle loads as well as producing tritium fuel on-site, but proposed solutions could help address these challenges. If successful, ITER will bring the world closer to developing fusion as a safe, clean, and virtually limitless source of energy.
Rocket engines produce thrust by accelerating and ejecting stored propellants at high speeds through a nozzle. They obtain high thrust-to-weight ratios but have the lowest fuel efficiency of all jet engines. Key components include the combustion chamber, where propellants combust at high pressures and temperatures, and the supersonic nozzle, which converts the hot gas energy into kinetic energy of the exhaust jet for propulsion. Rocket performance is optimized by maximizing exhaust velocity and specific impulse through high combustion temperatures, low-mass propellants, and nozzle designs that adapt to changing ambient pressures.
Nuclear thermal propulsion in space(NTP)SANDIP THORAT
This document provides an overview of nuclear thermal propulsion in space. It discusses the basics of nuclear physics and how nuclear thermal rockets work by pumping liquid hydrogen propellant through a solid nuclear reactor core to heat it. Different types of nuclear rockets are described, including solid core, gas core, nuclear electric, and nuclear pulse rockets. The document also reviews literature on nuclear thermal propulsion design concepts. A case study is presented on a small nuclear thermal rocket design utilizing an extremely high temperature gas cooled reactor. Specific impulse, advantages and disadvantages of nuclear propulsion, and applications are discussed. The conclusion is that nuclear thermal propulsion can provide higher efficiency than chemical propulsion for space applications.
1. Radioactivity can be detected using photographic film or a Geiger-Muller detector. Background radiation comes from natural sources like radon gas emanating from rocks and internal radiation from radioactive elements inside our bodies.
2. The activity of a radioactive source is measured in becquerels and refers to the number of decays per second. It decreases over time as the radioactive material decays. Half-life refers to the time it takes for half the radioactive material or nuclei to decay and is different for each isotope.
3. Calculating half-lives involves determining the amount of radioactive material or activity remaining after set time periods equal to the half-life. Graphing the decay of an isotope over time can also
This document provides an overview of radioactivity including its discovery, sources, applications, and health effects. It discusses how radioactivity was discovered by Becquerel and the Curies. Sources include primordial radionuclides in the Earth, cosmogenic radionuclides from cosmic rays, and anthropogenic radionuclides from nuclear activities. Applications include uses in medicine, industry, electricity generation, space exploration and food preservation. Examples of nuclear disasters like Chernobyl and Fukushima are provided along with effects of radiation exposure.
The document summarizes a proposal for a fission fragment rocket engine (FFRE) capable of powering spacecraft. Key points:
- The FFRE uses suspended plutonium carbide dust grains that undergo fission, producing fragments that are directed out the nozzle at 1.7% the speed of light, generating thrust.
- Initial designs suggest the FFRE could provide 10s to 100s of pounds of continuous thrust for years, with a specific impulse over 500,000 seconds.
- Preliminary assessments found a FFRE-powered spacecraft could travel faster and with more payload than current chemical or nuclear designs, enabling missions to Jupiter within 8 years round trip.
- While the concept is
A brief history of chemical rocket engines (thrusters) for spacecraftAkira Kakami
This slide addresses chemical thruster on spacecraft and its history. A newer version with correction and addition is available: https://sites.google.com/view/akira-kakami/home
1. The document discusses using positrons, the antimatter counterpart to electrons, for propulsion applications through a process called positron energy conversion. Positrons annihilate with electrons to release tremendous energy that could potentially power aircraft or spacecraft.
2. It outlines the basic technology required, including moderating positrons, confining them electromagnetically, and using the heat from annihilation reactions. Simulations showed this could power ramjet or rocket engines.
3. Previous research at Lawrence Livermore National Laboratory demonstrated nuclear-powered ramjet technologies in the 1960s, providing proof of concept for antimatter propulsion ideas. Further research aims to develop the capability to produce, moderate, and store sufficient positrons for experiments
Presentation on energy iter2017 januaryCooper Lackay
This document provides an overview of nuclear fusion and the ITER (International Thermonuclear Experimental Reactor) project. It describes how ITER aims to demonstrate the scientific and technological feasibility of fusion power by producing 500 megawatts of power sustained for long periods using the tokamak design. Key challenges for ITER include materials issues from high heat and particle loads as well as producing tritium fuel on-site, but proposed solutions could help address these challenges. If successful, ITER will bring the world closer to developing fusion as a safe, clean, and virtually limitless source of energy.
Rocket engines produce thrust by accelerating and ejecting stored propellants at high speeds through a nozzle. They obtain high thrust-to-weight ratios but have the lowest fuel efficiency of all jet engines. Key components include the combustion chamber, where propellants combust at high pressures and temperatures, and the supersonic nozzle, which converts the hot gas energy into kinetic energy of the exhaust jet for propulsion. Rocket performance is optimized by maximizing exhaust velocity and specific impulse through high combustion temperatures, low-mass propellants, and nozzle designs that adapt to changing ambient pressures.
Nuclear thermal propulsion in space(NTP)SANDIP THORAT
This document provides an overview of nuclear thermal propulsion in space. It discusses the basics of nuclear physics and how nuclear thermal rockets work by pumping liquid hydrogen propellant through a solid nuclear reactor core to heat it. Different types of nuclear rockets are described, including solid core, gas core, nuclear electric, and nuclear pulse rockets. The document also reviews literature on nuclear thermal propulsion design concepts. A case study is presented on a small nuclear thermal rocket design utilizing an extremely high temperature gas cooled reactor. Specific impulse, advantages and disadvantages of nuclear propulsion, and applications are discussed. The conclusion is that nuclear thermal propulsion can provide higher efficiency than chemical propulsion for space applications.
1. Radioactivity can be detected using photographic film or a Geiger-Muller detector. Background radiation comes from natural sources like radon gas emanating from rocks and internal radiation from radioactive elements inside our bodies.
2. The activity of a radioactive source is measured in becquerels and refers to the number of decays per second. It decreases over time as the radioactive material decays. Half-life refers to the time it takes for half the radioactive material or nuclei to decay and is different for each isotope.
3. Calculating half-lives involves determining the amount of radioactive material or activity remaining after set time periods equal to the half-life. Graphing the decay of an isotope over time can also
This document provides an overview of radioactivity including its discovery, sources, applications, and health effects. It discusses how radioactivity was discovered by Becquerel and the Curies. Sources include primordial radionuclides in the Earth, cosmogenic radionuclides from cosmic rays, and anthropogenic radionuclides from nuclear activities. Applications include uses in medicine, industry, electricity generation, space exploration and food preservation. Examples of nuclear disasters like Chernobyl and Fukushima are provided along with effects of radiation exposure.
The document summarizes a proposal for a fission fragment rocket engine (FFRE) capable of powering spacecraft. Key points:
- The FFRE uses suspended plutonium carbide dust grains that undergo fission, producing fragments that are directed out the nozzle at 1.7% the speed of light, generating thrust.
- Initial designs suggest the FFRE could provide 10s to 100s of pounds of continuous thrust for years, with a specific impulse over 500,000 seconds.
- Preliminary assessments found a FFRE-powered spacecraft could travel faster and with more payload than current chemical or nuclear designs, enabling missions to Jupiter within 8 years round trip.
- While the concept is
A railgun was developed to launch hypervelocity projectiles using electromagnetic propulsion. Key points:
- A 240kJ capacitor bank powered the railgun, launching projectiles to velocities over 2 km/s.
- The railgun consisted of parallel copper rails that generated currents of hundreds of kA when powered, using Lorentz force to accelerate projectiles down the rails.
- Data acquisition equipment measured critical parameters like current, projectile position and velocity. A simulation code was also developed to optimize railgun performance.
- Various projectile and railgun designs were tested, with best results achieved with polycarbonate projectiles and railgun designs using fiberglass and epoxy resin to contain the
The document provides a history of nuclear energy, from discoveries in the late 19th century to modern use of nuclear power. It describes key events like the discovery of radioactivity and radiation, early experiments identifying nuclear fission, and the first controlled nuclear reaction. It then explains the basic process of how uranium is mined, enriched, and used as fuel in nuclear reactors to generate energy.
The document discusses various topics related to radioactivity including its sources, types of radiation emitted, units of radioactivity, applications in medicine, and examples of nuclear disasters. It provides background on radioactivity and its discovery. Key points include that radioactivity is the spontaneous emission of radiation from unstable atomic nuclei, the three main types of radiation are alpha, beta, and gamma, and applications of radioactivity include uses in medicine such as medical imaging and carbon dating. Nuclear disasters discussed include Chernobyl and Fukushima.
This document discusses radioactivity and its applications. It begins with an introduction to radioactivity, sources of radionuclides, and background radiation. It then discusses several applications of radioactivity including medical uses in diagnosis and treatment, food preservation, crop improvement, and space exploration. The document also summarizes several nuclear disasters and accidents involving radioactivity. It concludes with information on radiation dose limits and additional references.
Ion propulsion
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THOMSON & RUTHERFORD MODEL 2 ch4 structure of atom cl ix HarAmritKaur6
The document summarizes the development of atomic structure models from Thomson to Bohr. It discusses Thomson's "plum pudding" model where electrons are distributed uniformly in the atom. Rutherford's gold foil experiment showed that the mass is concentrated in a small nucleus. Rutherford proposed that electrons orbit the nucleus like planets around the sun. Bohr refined this model by suggesting that electrons can only orbit at certain distances corresponding to specific energy levels. The Bohr model explained the emission spectrum of hydrogen.
This document discusses nuclear thermal propulsion for space applications. It begins by introducing the concept and some historical programs in the US and Russia. It then discusses the benefits of nuclear thermal propulsion such as high efficiency and payload capacity compared to chemical rockets. The document goes on to describe three types of nuclear energy sources - fission, radioactive isotope decay, and fusion - that have been investigated for heating propellant. It provides details on nuclear fission and isotope decay rockets and components of a nuclear fission reactor before concluding with a comparison of advantages and disadvantages of nuclear rockets.
The Ion Propulsion is being mostly used in the vacuum of space for accurate movement of various small ( less than 4800kgs) space bound vehicles like satellites. Although they are not used for launching bodies space from earth through the atmosphere primarily for their weak thrust (in hundreds of micro-Newton) which can’t overcome the pull of gravity & the drag of air successfully, technological advances may or may not enable the launching alongside chemical propulsion or entirely on its own in the far future. The motivation behind the experiment conducted was to gauge empirically the thrust produced by a simple ion thruster working in the near sea-level atmospheric conditions & to observe the propulsion at different configurations. Ion thrusters being one of the efficient engines poses some unanswered questions & are worth investigating mainly because of their high efficiencies. Although the prediction made is that the thrust will be in micro-Newton because of the low power input to the system & the overall efficiency may also be low (less than 50%) due to various losses in electrical systems, design, viscosity of air, etc. A well designed commercial thruster may be able to produce acceptable efficiencies but the setup used here is a simple one
Cyclotrons are particle accelerators that use magnetic and electric fields to accelerate charged particles in a circular path. They are commonly used to produce short-lived radionuclides for positron emission tomography by bombarding target materials with protons or deuterons. Key components of a cyclotron include ion sources, dees, magnetic fields, radiofrequency systems, and targets.
The nuclear disaster at Chernobyl in 1986 exposed millions of people to radiation and caused widespread health issues. Workers who helped with the cleanup effort faced high risks of illness and death in the following decades. Children in the affected areas suffered from increased rates of cancer, mental disabilities, and lowered immune systems. Long-term effects of radiation exposure from Chernobyl continue to impact communities through genetic mutations that are passed down to future generations.
Forensic Terrorism: Detection of ExplosivesJedidah Moses
Definition of major terms ( forensic terrorism, explosives and explosion).
History of explosives.
Classifications of explosives.
Chemical structures of some explosives.
Forensic analysis of explosives.
Case study.
This document discusses a proposed mission concept to send a probe to 1000 AU within 50 years using currently feasible technologies. Key elements include:
1) Using a solar gravity assist at Jupiter to eliminate angular momentum, then falling to within 4 solar radii of the Sun to leverage the high speeds for an escape trajectory.
2) The probe would use a high-Isp propulsion system like solar thermal or nuclear thermal to accelerate during a 15-minute perihelion maneuver for solar system escape.
3) Enabling technologies discussed include high-temperature carbon-carbon shields, efficient radioisotope power, and laser optical communications. Follow-on studies are proposed to further develop the concepts.
A liquid-propellant rocket or a liquid rocket is a rocket engine that uses propellants in liquid form. Liquids are desirable because their reasonably high density ...
IRJET - Electric Propulsion System – Ion ThrusterIRJET Journal
This document provides an overview of ion thrusters as an electric propulsion system. Ion thrusters ionize and accelerate ions, typically xenon, to produce thrust. They are much more fuel efficient than chemical rockets, requiring only kilowatts of power, but produce very small thrust. However, their high efficiency and ability to provide continuous, low-thrust acceleration over long periods makes them well-suited for missions requiring precise station keeping or interplanetary travel. Examples of ion thrusters discussed include NASA's NSTAR and NEXT systems. NSTAR was used successfully on the Deep Space 1 mission in 1998.
Nuclear engineering harnesses the power of the atom to do work. It involves understanding nuclear physics principles like fission and fusion, designing and operating nuclear reactors, developing nuclear medicine applications, ensuring nuclear non-proliferation, and managing radioactive waste. Some key areas of nuclear engineering include power generation, weapons development, space applications, medical imaging and treatment, food irradiation, and more. Nuclear engineers work in government, national labs, power companies, the military, medicine, and academia developing and overseeing applications of nuclear technology.
Cryogenic engines use cryogenic fuels or oxidizers that are liquefied and stored at very low temperatures. They have high performance due to the rapid expansion of the liquid fuels to gas in the combustion chamber, producing thrust. Components are cooled to prevent boiling in the fuel lines. Some disadvantages are bulky cryogenic fuel tanks requiring heavy insulation, but their high fuel efficiency outweighs this. The Space Shuttle used cryogenic engines for lift-off. Key components include the combustion chamber, fuel injector, and rocket nozzle. Fuel and oxidizer are injected and mixed for combustion, producing hot exhaust gas that is accelerated through the nozzle to generate thrust.
The document summarizes a presentation on technetium and rhenium given by K.E. German at the Fourth Adv.-ORIENT Cycle Seminar in Japan. The presentation covered:
1) The discovery of technetium and rhenium, their natural abundance.
2) Main problems associated with technetium separation from nuclear waste.
3) Russian experiences developing separation technologies and fundamental studies of technetium compounds conducted at the Russian Academy of Sciences.
The document discusses nuclear power and nuclear reactors. It provides information on the types of nuclear reactors used worldwide including pressurized water reactors (PWR), boiling water reactors (BWR), and pressurized heavy water reactors (PHWR). It also discusses nuclear power plants in various countries like the US, France, Japan, South Korea, and provides statistics on nuclear power reactors operating and under construction worldwide.
A railgun was developed to launch hypervelocity projectiles using electromagnetic propulsion. Key points:
- A 240kJ capacitor bank powered the railgun, launching projectiles to velocities over 2 km/s.
- The railgun consisted of parallel copper rails that generated currents of hundreds of kA when powered, using Lorentz force to accelerate projectiles down the rails.
- Data acquisition equipment measured critical parameters like current, projectile position and velocity. A simulation code was also developed to optimize railgun performance.
- Various projectile and railgun designs were tested, with best results achieved with polycarbonate projectiles and railgun designs using fiberglass and epoxy resin to contain the
The document provides a history of nuclear energy, from discoveries in the late 19th century to modern use of nuclear power. It describes key events like the discovery of radioactivity and radiation, early experiments identifying nuclear fission, and the first controlled nuclear reaction. It then explains the basic process of how uranium is mined, enriched, and used as fuel in nuclear reactors to generate energy.
The document discusses various topics related to radioactivity including its sources, types of radiation emitted, units of radioactivity, applications in medicine, and examples of nuclear disasters. It provides background on radioactivity and its discovery. Key points include that radioactivity is the spontaneous emission of radiation from unstable atomic nuclei, the three main types of radiation are alpha, beta, and gamma, and applications of radioactivity include uses in medicine such as medical imaging and carbon dating. Nuclear disasters discussed include Chernobyl and Fukushima.
This document discusses radioactivity and its applications. It begins with an introduction to radioactivity, sources of radionuclides, and background radiation. It then discusses several applications of radioactivity including medical uses in diagnosis and treatment, food preservation, crop improvement, and space exploration. The document also summarizes several nuclear disasters and accidents involving radioactivity. It concludes with information on radiation dose limits and additional references.
Ion propulsion
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THOMSON & RUTHERFORD MODEL 2 ch4 structure of atom cl ix HarAmritKaur6
The document summarizes the development of atomic structure models from Thomson to Bohr. It discusses Thomson's "plum pudding" model where electrons are distributed uniformly in the atom. Rutherford's gold foil experiment showed that the mass is concentrated in a small nucleus. Rutherford proposed that electrons orbit the nucleus like planets around the sun. Bohr refined this model by suggesting that electrons can only orbit at certain distances corresponding to specific energy levels. The Bohr model explained the emission spectrum of hydrogen.
This document discusses nuclear thermal propulsion for space applications. It begins by introducing the concept and some historical programs in the US and Russia. It then discusses the benefits of nuclear thermal propulsion such as high efficiency and payload capacity compared to chemical rockets. The document goes on to describe three types of nuclear energy sources - fission, radioactive isotope decay, and fusion - that have been investigated for heating propellant. It provides details on nuclear fission and isotope decay rockets and components of a nuclear fission reactor before concluding with a comparison of advantages and disadvantages of nuclear rockets.
The Ion Propulsion is being mostly used in the vacuum of space for accurate movement of various small ( less than 4800kgs) space bound vehicles like satellites. Although they are not used for launching bodies space from earth through the atmosphere primarily for their weak thrust (in hundreds of micro-Newton) which can’t overcome the pull of gravity & the drag of air successfully, technological advances may or may not enable the launching alongside chemical propulsion or entirely on its own in the far future. The motivation behind the experiment conducted was to gauge empirically the thrust produced by a simple ion thruster working in the near sea-level atmospheric conditions & to observe the propulsion at different configurations. Ion thrusters being one of the efficient engines poses some unanswered questions & are worth investigating mainly because of their high efficiencies. Although the prediction made is that the thrust will be in micro-Newton because of the low power input to the system & the overall efficiency may also be low (less than 50%) due to various losses in electrical systems, design, viscosity of air, etc. A well designed commercial thruster may be able to produce acceptable efficiencies but the setup used here is a simple one
Cyclotrons are particle accelerators that use magnetic and electric fields to accelerate charged particles in a circular path. They are commonly used to produce short-lived radionuclides for positron emission tomography by bombarding target materials with protons or deuterons. Key components of a cyclotron include ion sources, dees, magnetic fields, radiofrequency systems, and targets.
The nuclear disaster at Chernobyl in 1986 exposed millions of people to radiation and caused widespread health issues. Workers who helped with the cleanup effort faced high risks of illness and death in the following decades. Children in the affected areas suffered from increased rates of cancer, mental disabilities, and lowered immune systems. Long-term effects of radiation exposure from Chernobyl continue to impact communities through genetic mutations that are passed down to future generations.
Forensic Terrorism: Detection of ExplosivesJedidah Moses
Definition of major terms ( forensic terrorism, explosives and explosion).
History of explosives.
Classifications of explosives.
Chemical structures of some explosives.
Forensic analysis of explosives.
Case study.
This document discusses a proposed mission concept to send a probe to 1000 AU within 50 years using currently feasible technologies. Key elements include:
1) Using a solar gravity assist at Jupiter to eliminate angular momentum, then falling to within 4 solar radii of the Sun to leverage the high speeds for an escape trajectory.
2) The probe would use a high-Isp propulsion system like solar thermal or nuclear thermal to accelerate during a 15-minute perihelion maneuver for solar system escape.
3) Enabling technologies discussed include high-temperature carbon-carbon shields, efficient radioisotope power, and laser optical communications. Follow-on studies are proposed to further develop the concepts.
A liquid-propellant rocket or a liquid rocket is a rocket engine that uses propellants in liquid form. Liquids are desirable because their reasonably high density ...
IRJET - Electric Propulsion System – Ion ThrusterIRJET Journal
This document provides an overview of ion thrusters as an electric propulsion system. Ion thrusters ionize and accelerate ions, typically xenon, to produce thrust. They are much more fuel efficient than chemical rockets, requiring only kilowatts of power, but produce very small thrust. However, their high efficiency and ability to provide continuous, low-thrust acceleration over long periods makes them well-suited for missions requiring precise station keeping or interplanetary travel. Examples of ion thrusters discussed include NASA's NSTAR and NEXT systems. NSTAR was used successfully on the Deep Space 1 mission in 1998.
Nuclear engineering harnesses the power of the atom to do work. It involves understanding nuclear physics principles like fission and fusion, designing and operating nuclear reactors, developing nuclear medicine applications, ensuring nuclear non-proliferation, and managing radioactive waste. Some key areas of nuclear engineering include power generation, weapons development, space applications, medical imaging and treatment, food irradiation, and more. Nuclear engineers work in government, national labs, power companies, the military, medicine, and academia developing and overseeing applications of nuclear technology.
Cryogenic engines use cryogenic fuels or oxidizers that are liquefied and stored at very low temperatures. They have high performance due to the rapid expansion of the liquid fuels to gas in the combustion chamber, producing thrust. Components are cooled to prevent boiling in the fuel lines. Some disadvantages are bulky cryogenic fuel tanks requiring heavy insulation, but their high fuel efficiency outweighs this. The Space Shuttle used cryogenic engines for lift-off. Key components include the combustion chamber, fuel injector, and rocket nozzle. Fuel and oxidizer are injected and mixed for combustion, producing hot exhaust gas that is accelerated through the nozzle to generate thrust.
The document summarizes a presentation on technetium and rhenium given by K.E. German at the Fourth Adv.-ORIENT Cycle Seminar in Japan. The presentation covered:
1) The discovery of technetium and rhenium, their natural abundance.
2) Main problems associated with technetium separation from nuclear waste.
3) Russian experiences developing separation technologies and fundamental studies of technetium compounds conducted at the Russian Academy of Sciences.
The document discusses nuclear power and nuclear reactors. It provides information on the types of nuclear reactors used worldwide including pressurized water reactors (PWR), boiling water reactors (BWR), and pressurized heavy water reactors (PHWR). It also discusses nuclear power plants in various countries like the US, France, Japan, South Korea, and provides statistics on nuclear power reactors operating and under construction worldwide.
Similar to JanRonningen-Rockets_and_how_they_work_ver1.30_2008.ppt (20)
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
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How to Fix the Import Error in the Odoo 17Celine George
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
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1. Rockets and how they work
By Jan-Erik Rønningen
Norwegian Rocket Technology
[ contact@rocketconsult.no ]
[ www.rocketconsult.no ]
Version: 1.30 2008
2. Contents
Rocket history
Rocket Principle
Fundamental Rocket Elements
The Solid Propellant Rocket
The Liquid Propellant Rocket
The Hybrid Rocket Motor
3. Rocket History 1
The Chinese is claimed by many to be the
inventor of the black powder (about 200
B.C) and thus the rockets
Newer findings indicate that it is India that
should be honored instead
However, old Chinese documents describe
long tradition in making various black
powder charges for use in firecrackers and
rockets mostly for frighten bad spirits during
religious happenings and during various
festivals and celebrations.
The Chinese also developed rockets and
flame torches to be used in combat against
their main enemy, the Mongols.
4. Rocket History 2
The Arabs learned the art of rocketry
from the Mongols and the Europeans
from the Arabs.
The Europeans developed the rocket
technology further, i.e. between the
14th and 16th century:
A English munch named Roger
Beacon improved the black powder
prescription for use as rocket
propellant, fire crackers and for use in
canons.
A French man improved the hit
accuracy of his artillery rockets by
launching them from tubes.
An Italian (Fontana) experimented
with rocket powered surface
torpedoes which could ran into the
cavalry or set ships on fire. One
successfully did!!
5. Rocket History 3
The interest of the rocket as a weapon
went into a hibernation during the 17th
century, mainly because of the poor
accuracy compare to the more
accurate and destructive canon.
Further improvements were
necessary.
A new dawn of rocketry appeared
during the 18th century and especially
some hundred years after Sir Isacc
Newton had published his famous
three laws.
During the 19th and 20th century
many men were to become well know:
Ziolkowsky, Hermann Oberth, Robert
H. Goddard, Eugen Sänger, Werner
von Braun, Korolev and many more
6. Rocket History 4
After the WWII the race for space
between USA and former Soviet
escalated and accelerated the
development of rocket technology to
what we know and use today.
Sputnik I – World first artificial
satellite launched 4. October 1957
Apollo 11 and Neil Armstrong –
First man on the Moon
20. July 1969
Vostok 1 and Yuri A, Gagarin –
First man in space
12. April 1961
7. The Rocket Principle 1
Newtons 2. law:
Newtons 3. law: force = opposite force
a
m
dt
v
m
d
F
)
(
Rocket
dt
dp
Exhaust
dt
dp
dt
v
m
d
dt
dp exhaust
Rocket
)
(
8. The Rocket Principle 2
A chemical rocket is a reaction device
that brings with itself the oxygen
needed for combustion and thus for
generating thrust for positive
propulsion
9. Rocket Elements – Main Parts
Convergent Divergent
section section
t e
i
c
Ve
Vt
Vc
c : chamber
i : entrance
t : throat
e : exit
V: velocity
F
10. Rocket Elements - Thrust
impulse
exhaust
exhaust
exhaust
exhaust
products
reaction
rocket
F
v
m
v
dt
dm
dt
v
m
d
dt
dp
_
)
(
Ambient Pressure
Ambient Pressure
Ambient Pressure
Exit Pressure
)
(
_ a
e
e
e
force
pressure P
P
A
P
A
F
)
(
_ a
e
e
e
force
pressure
impulse P
P
A
v
m
F
F
F
F
11. Rocket Elements - Nozzle Flow
[4]
or
0
:
expression
above
the
ting
Differenta
const.
ln
ln
ln
:
eq.1
of
logaritm
natural
the
now take
we
proceeding
Before
[3]
:
as
written
be
can
2
eq.
flow,
l
dimensiona
-
one
and
change
potential
no
assume
we
Since
height
:
z
and
)
(
weight
specific
:
speed,
:
v
density,
:
pressure,
:
p
:
where
line)
stream
a
along
(const.
[2]
0
)
(
5
.
0
:
friction)
no
(assuming
equation
Bernoulli
famous
the
to
leading
flow,
particle
fluid
steady
a
describe
to
utlilized
be
can
law
second
Newtons
[1]
.
:
states
mass
of
on
conservati
the
conduit,
a varying
gh
flow throu
fluid
a
When
2
2
A
dA
d
v
dv
v
dv
A
dA
d
v
A
v
dv
v
dp
g
dz
v
d
dp
const
v
A
m
0!
dA/dv
1,
Ma
When
[10]
1
dv
dA
:
gives
eq.8
of
g
rearrangin
A
1
Ma
:
flow
Supersonic
1
Ma
:
flow
Subsonic
:
conclude
can
we
which
From
[9]
)
1
(
dp
:
us
gives
eq.8
and
4
Eq.
[8]
)
1
(
1
v
dv
:
form
to
eq.7
with
merged
be
further
can
3
Eq.
[7]
1
:
as
written
be
6
eq.
now with
can
5
Eq.
[6]
and
:
density
with
pressure
of
s
variation
to
related
is
sound
of
speed
the
less),
friction
and
(adiabatic
flow
isentropic
assume
We
[5]
1
:
gives
[4]
[3]
2
2
2
2
2
2
2
2
Ma
v
A
Ma
Ma
A
dA
Ma
A
dA
A
dA
Ma
v
dp
a
v
Ma
p
a
A
dA
d
dp
v
v
dp
s
Flow
Flow
14. Rocket Elements - Total Impulse
0,00
5000,00
10000,00
15000,00
20000,00
25000,00
30000,00
35000,00
0,000 1,000 2,000 3,000 4,000 5,000 6,000 7,000
Time (s)
Thrust
(N)
b
tb
t t
F
dt
t
F
I
0
)
(
15. Static Firing a Rocket Motor
NSR 30kN Hybrid Rocket Motor, 20s test
16. Rocket Elements - Specific Impulse
Specific Impuls Values for Various Chemical Propellants
830
1442 1470
1825 1880
2200
2600 2630
3240
3796
10000
0
2000
4000
6000
8000
10000
12000
75% KNO3 +
15% S +
10% C
H2O2 +
KMnO4
65% KNO3 +
35%
C6H14O6
75% KClO4
+ 17.5%
Asphalt +
7.5% Oil
82%
NH4NO3 +
11% HTPB +
7% Additives
60% NG +
40% NC
78%
NH4ClO4 +
15% HTPB +
7% AL
RFNA + RP1 LO2 + HTPB LO2 + LH LH2 + U235
Specific
Impuls
[Ns/kg]
Non Chemical
Rocket Propellant Condition Exampel of Use ISP [Ns/kg]
Black Powder (75%KNO3 + 15%S + 10%C) Pressed Powder Fireworks 830
Hydrogen Peroxide H2O2(l) + Potassium Permanganat KMnO4(s) Liquid/Solid Hobby Rockets 1442
Candy Propellant (65%KNO3 + 35%C6H14O6) Hot Casted Hobby Rockets 1470
75% KClO4 + 17.5% Asphalt/Tar + 7.5% Oil Casted Hobby Rockets 1825
82% NH4NO3 + 11% HTPB + 7% Additives Casted Gassgenerator 1880
Double Base (60% Nitroglycerine + 40% Nitrcellulose) Extruded Missiles 2200
78% NH4ClO4 + 15% HTPB + 7% Al Casted Ariane 5 SRB 2600
RFNA + Kerosene (RP1) (1.43 Mixtureratio) Liquid X-1 Rocket Plane 2630
LOX + HTPB Liquid/Solid Launch Vehicle 3240
LOX + LH (3.40 Mixtureratio) Liquid Ariane 5 1.stage 3796
LH + Solid Core Nuclear Reactor (Fisson of U235) Liquid/Solid Nerva Test Motor 10000
d
b
sp
m
t
F
I
17. The Solid Propellant Rocket
Construction:
Motor Case Thermal Insulation
Propellant Nozzle
Igniter
18. Solid Propellant Rocket
PARAMETER CHARACTERISTIC VALUE RANGE
Specific Impulse [m/s] 2000-2600
Burn rate [mm/s] 1-15
Chamber Pressure [MPa] 7-20
Combustion Efficiency [-] 0.95-0.98
Thrust to Weight Ratio High
Throttle? Difficult
Stop and Restart? Not Practical
Lifetime? Long (7 to 15 years)
19. The Solid Propellant Rocket
Propellant Mixing:
300 gallon approx. 1200kg of propellant
24. The Liquid Propellant Rocket
PARAMETER CHARACTERISTIC VALUE RANGE
Specific Impulse [m/s] 2500-3800
Burn Rate [mm/s] N.A
Chamber Pressure [MPa] 2-10
Combustion Efficiency [-] 0.95-0.98
Thrust to Weight Ratio Low
Throttle? Easy
Stop and Restart? Easy
Lifetime? Very Long (> 10 years)
28. The Hybrid Rocket
Nozzle
Combustion Chamber
Pressurized Nitrogen or Helium
Start/stop Valve and pressure
regulator
Valve Electronics
Check Valve Solid Grain
“Mixing” Zone
Injector
Liquid
Flow Valve and Regulator
with control electronics
29. The Hybrid Rocket
PARAMETER CHARACTERISTIC VALUE RANGE
Specific Impulse [m/s] 2100-3200
Regression rate [mm/s] 0.2-5
Chamber Pressure [MPa] 2-5
Combustion Efficiency [-] 0.90-0.95
Thrust to Weight Ratio Medium
Throttle? Easy
Stop and Restart? Easy
Lifetime? Very Long (>10 years)