I think you want to land nuclear reactors with ion thusters on the surface of the NEO, a long time back from possible impact. Ideally with some technology that can convert material on the object to the right kind of ionized gas.
Energy = mv^2/2 so you accelerate the ions in a beam at extremely high velocity, electrically.
You need a control system to only send out the ion beam each time a tumbling object is facing the correct way.
You run the ion thrusters for months or years, and hope for the best.
The pilots should have reasoned: "Engines not responding to control. Since the engines are still at least giving us high power, we should climb to a height that gives us options, then try some things to fix the problem, or figure out how to cut the engines completely and glide in, having enough height to get the setup of the difficult approach just right."
Of course the maintenance program manager for the aircraft manufaturer should have reasoned: "All maintenance procedures should be performed by checking off, in an app, a detailed automated checklist of steps, such as restoring custom-data files. The maintenance software app should not permit maintenance to be signed off as complete until the automated checklist is all checkmarked. and it goes without saying that all such step-by-step procedures should be verified as complete and working before being included in allowed maintenance procedures of operational aircraft."
We will have solar panels but lots of partial-array shading so no series-strings for us thus no high DC voltage and sadly, no Tesla Powerwall.
Instead, we'll go for a large 24V LiFePO4 of LiYFePO4 battery pack, and re-use some of our existing house circuits for 24 V DC for LED lights and 24V fridge and freezer. The 24V or 48V RV/Yacht fridges/freezers available are 5 to 10 times more energy efficient than standard "Energy Star" AC fridges.
Then we'll run a cheap DC/AC inverter or two for running laptops from the DC system.
Laptops, lights, (beer) fridge. In summer, what else do you need really?
But that happens relatively rarely, and it is rarer still that the new theory completely falsifies the old theory and observations.
More often, the new theory just puts the old one in perspective, or modifies it partially.
e.g. Newton's theory of gravitation, acceleration, velocity etc. are special cases of Einstein's theory. The two theories both align very well with observation at most measurement precisions and time, distance, and mass scales that people have ever experienced.
My philosophy has always been that once having passed the bar of qualification, a scientist should be left alone, career-wise, to have peace, and time to think and experiment, and time to try and fail with impunity. And these time chunks need to be on the order of 5 years or so.
The current system is optimized to produce incremental advances by scientific worker-drones. It is not designed to produce important new insights or confidently well tested important results.
It is way more expensive to waste scientific talent on bureacracy, grant application toil and stress, and writing of interim cruft than it would be to just let the people friggin' work unmolested using their own best judgement and wisdom about what to work on and at what pace and priority.
Scientists are, or are before it is beat out of them, all highly self-motivated, DRIVEN people with unique interests and insights.
0. MAKE A CONCEPTUAL MODEL OF THE PROBLEM-DOMAIN THAT YOUR PROGRAM WILL REPRESENT AND WORK ON. Jot down a circles-and-arrows model (diagram) of the types of entities that exist (and are important as far as your program will be concerned) in your problem domain. The circles, with an entity-type-name written in each, represent the important different kinds of objects/entities in your domain. The arrows, which you may refer to later when defining attributes or functions that work on the entity types, summarize the important relationships you have noticed between the different kinds of entities in your problem-domain. Look around for groups of entity-types in your domain model which are really just different subtypes of a common kind of general entity type in your domain. Create a named circle for the general type of entity, drawing it above the group of more specific subtype entity-type circles, and join the general-entity-type circle, to each of the entity-subtype circles separately, with a different kind/colour of arrow than you used to represent relationships between one kind of entity and a completely different kind in your domain model diagram.
1. TURN THE CONCEPTUAL MODEL OF THE DOMAIN INTO A STRUCT-BASED DATA MODEL
Organize data (variable) definitions in the program you are writing into "struct" definitions, where each kind of struct has a set of attributes that together represent the essential properties of some kind of entity in your problem domain.
(And, for advanced credit, create an additional named struct-type to represent the properties of some kind of abstract record-keeping entity-type you are concocting as part of your "solution" domain. A "solution" domain model is an extension of your model of the problem domain, where you are adding abstractions (new variables) into your problem domain to create a computer model of the solution to whatever problem you've been asked to program a solution for in the problem domain. Some of those solution-domain entity types may not have occurred to you when you first looked around at the external "outside of the program" problem-domain to create your struct-definition-based data model of the problem domain entity types.)
2. NAME YOUR DATA TYPES AFTER THE PRECISE NAMES OF DOMAIN ENTITY TYPES
Use the common (but precise) name of each kind of domain entity as the type-name of the corresponding struct definition.
3. METHODS - are functions/procedures specifically applicable to the attributes of a single struct type.
For each type of struct you have defined, define the interface signature of, and code for the implemention of, a set of functions which access the attributes of, set the attribute values of, or compute some function of the attributes of a single type of struct.
4. INHERITANCE
Object-oriented languages let you create a struct-type which is meant to represent a specific subtype of domain entity, whenever you have already created a struct-type (and its functions) to represent the common attributes shared by several subtypes of entity. That is, you have already created an abstract supertype struct definition to represent general properties of a general category of domain entity, now you want to add attributes (or specific values of attributes) that describe how different subtypes of the general entity differ from each other. In an object oriented programming language, the subtype of struct can be created so that its definition references (mentions) the supertype struct type by name. Then any in-memory instance of that subtype struct inherits all the attributes and applicable functions of the supertype struct definition. Then you add more, specific attributes, attribute value settings, and function interfaces or function implementations to the new subtype of struct you are creating.
5. PROGRAM WITH YOUR DOMAIN-ENTITY-MODELLING STRUCTS AND THEIR STRUCT-TYPE-SPECIFIC FUNCTION-SETS To represent
Currently, EVs represent 0.115 % of motor vehicles on US roads and 0.06% worldwide.
That is, roughly 1 out of 1000 vehicles in the US and 1 out of every 1700 vehicles worldwide.
Remember that we are trying to keep global warming below 2 degrees Celsius and so far epic failing on that.
My proposal, consistent with climate prudence, is to keep using increased gas taxes until EVs become 50% of vehicles on the road, then and only then start transitioning to distance-travelled fees.
You are SUPPOSED to be incentivising the switch away from fossil fuel transportation now, and as you can see, there are miles and miles and miles to go on the transition plan.
Stopping the various EV incentives now is the kind of short term thinking insanity that got us into this mess in the first place.
Want to run a 24V DC "RV electrical system / yacht electrical system" from a DC sub-panel in my house running efficient DC fridge, LED lights, small inverter for laptops etc, and maybe a larger inverter for a diversion load in summer.
Also, our PV modules on our roof need to be entirely in parallel because lots of partial-array shading at various times of day. So our input voltage range (to batteries) will be around 30V and the output should be 24V DC.
Anyone seen the spec. for input voltage range for the Tesla Powerwall?
Also, anyone know where one can get a 400V to 24V efficient and safe DC/DC converter for the output side of the Powerwall?
Members of congress have a library? Don't they know libraries are full of liberals? "There's only one book worth reading!" I was pretty sure they stayed far away from libraries, and radical interwebs and such.
It should be accessible to everyone, period, with the small exception, arguably, of extremely dangerous techniques such as methods of creating artificial super-viruses etc.
Science thrives by the collective discovery, review and improvement of knowledge. The more the disseminationof the knowledge is, the more valuable the knowledge becomes, and the more likely the knowledge is to improve faster.
Throughout history, some peoples' contribution has been to insert themselves as a toll troll on the bridge, even if the bridge was built by others. This is a despicable friction on the function of society.
Why aren't there companies offering to put solar PV on your roof (e.g. even if you're poor), and you can pay them basically the standard utility rate for your electricity. The company can make the difference in profit, after fixed costs. Such companies are operating in the US.
Meanwhile, solar infrastructure is built up, as it needs to be to reduce GHG emissions.
If you have one large lake located up high somewhere and can pump water uphill to it, problem solved.
Does Hawaii have any high ground? Thought so.
Or if you're concerned about ecosystem alteration due to changing water flows, then
if you have one very large hydrogen tank facility somewhere with an electrolysis system (new efficient designs are here or almost here) and fuel cells, problem solved.
Or if you have an ocean floor where you can store a whole bunch of large balloon bags full of air, problem solved.
It's true that these storage methods have a low round-trip energy efficiency, but that energy is coming from the fricking sun - photosynthetic life is about 2% efficient at using solar energy). PV with inefficient storage of its peak generation is still a way better idea than continuing to burn coal and gas to make electricity.
Any batch of electrons with the same average voltage is fully substitutable for any other batch of the same number with the same average voltage, from an electrical power use perspective.
I'm not in favour of selling drinking water, but the situation is the same as if a water distribution network had N companies each pumping in water to the pipe network from their lake at a metered rate, and the water coming out the output pipes of the network was sold to a whole bunch of people. Not sure what you don't understand about how that should work as a market system, and how you would divide the revenues. Pretty damn simple really.
Slashdot Mirror
Why not replace the download with an error message stating that you need to upgrade to version whatever.
Since they already know which versions of what have critical security flaws.
Too obvious?
Not as good for the bottom line as selling a library flagging tool?
thermonuclear warheads on ICBMs are hydrogen fusion bombs. I believe they are initially triggered with a smaller fission reaction.
Let me see, will a hydrogen fusion reaction work in space?
If I could only get the Sunlight out of my eyes, I could google that on my smartphone for you.
I think you want to land nuclear reactors with ion thusters on the surface of the NEO, a long time back from possible impact.
Ideally with some technology that can convert material on the object to the right kind of ionized gas.
Energy = mv^2 /2 so you accelerate the ions in a beam at extremely high velocity, electrically.
You need a control system to only send out the ion beam each time a tumbling object is facing the correct way.
You run the ion thrusters for months or years, and hope for the best.
again?
Or just an identity check using a neural-response scan while certain questions are being asked:
https://www.youtube.com/watch?...
The pilots should have reasoned: "Engines not responding to control. Since the engines are still at least giving us high power, we should climb to a height that gives us options, then try some things to fix the problem, or figure out how to cut the engines completely and glide in, having enough height to get the setup of the difficult approach just right."
Of course the maintenance program manager for the aircraft manufaturer should have reasoned: "All maintenance procedures should be performed by checking off, in an app, a detailed automated checklist of steps, such as restoring custom-data files. The maintenance software app should not permit maintenance to be signed off as complete until the automated checklist is all checkmarked. and it goes without saying that all such step-by-step procedures should be verified as complete and working before being included in allowed maintenance procedures of operational aircraft."
My printer at home does it every time it starts up.
Too bad the airplane doesn't.
I guess production delays are more expensive than debugging-by-crash. Sad.
before our robots became cheaper than their workers, and capable enough to do the job.
Don't be fooled into thinking this trend is much of a local employment boon.
(Unless you're a robot.)
And this would make the testing of my Oscillation Overthruster version 2 prototype in my basement so much easier.
Right now having to hot-wire to the medium-voltage side of the pole-top transformer is such a pain.
We will have solar panels but lots of partial-array shading so no series-strings for us thus no high DC voltage and sadly, no Tesla Powerwall.
Instead, we'll go for a large 24V LiFePO4 of LiYFePO4 battery pack, and re-use some of our existing house circuits for 24 V DC for LED lights and 24V fridge and freezer. The 24V or 48V RV/Yacht fridges/freezers available are 5 to 10 times more energy efficient than standard "Energy Star" AC fridges.
Then we'll run a cheap DC/AC inverter or two for running laptops from the DC system.
Laptops, lights, (beer) fridge. In summer, what else do you need really?
But that happens relatively rarely, and it is rarer still that the new theory completely falsifies the old theory and observations.
More often, the new theory just puts the old one in perspective, or modifies it partially.
e.g. Newton's theory of gravitation, acceleration, velocity etc. are special cases of Einstein's theory. The two theories both align very well with observation at most measurement precisions and time, distance, and mass scales that people have ever experienced.
My philosophy has always been that once having passed the bar of qualification, a scientist should be left alone, career-wise, to have peace, and time to think and experiment, and time to try and fail with impunity. And these time chunks need to be on the order of 5 years or so.
The current system is optimized to produce incremental advances by scientific worker-drones. It is not designed to produce important new insights or confidently well tested important results.
It is way more expensive to waste scientific talent on bureacracy, grant application toil and stress, and writing of interim cruft than it would be to just let the people friggin' work unmolested using their own best judgement and wisdom about what to work on and at what pace and priority.
Scientists are, or are before it is beat out of them, all highly self-motivated, DRIVEN people with unique interests and insights.
Take off the reigns.
0. MAKE A CONCEPTUAL MODEL OF THE PROBLEM-DOMAIN THAT YOUR PROGRAM WILL REPRESENT AND WORK ON.
Jot down a circles-and-arrows model (diagram) of the types of entities that exist (and are important as far as your program will be concerned) in your problem domain. The circles, with an entity-type-name written in each, represent the important different kinds of objects/entities in your domain. The arrows, which you may refer to later when defining attributes or functions that work on the entity types, summarize the important relationships you have noticed between the different kinds of entities in your problem-domain. Look around for groups of entity-types in your domain model which are really just different subtypes of a common kind of general entity type in your domain. Create a named circle for the general type of entity, drawing it above the group of more specific subtype entity-type circles, and join the general-entity-type circle, to each of the entity-subtype circles separately, with a different kind/colour of arrow than you used to represent relationships between one kind of entity and a completely different kind in your domain model diagram.
1. TURN THE CONCEPTUAL MODEL OF THE DOMAIN INTO A STRUCT-BASED DATA MODEL
Organize data (variable) definitions in the program you are writing into "struct" definitions, where each kind of struct has a set of attributes that together represent the essential properties of some kind of entity in your problem domain.
(And, for advanced credit, create an additional named struct-type to represent the properties of some kind of abstract record-keeping entity-type you are concocting as part of your "solution" domain. A "solution" domain model is an extension of your model of the problem domain, where you are adding abstractions (new variables) into your problem domain to create a computer model of the solution to whatever problem you've been asked to program a solution for in the problem domain. Some of those solution-domain entity types may not have occurred to you when you first looked around at the external "outside of the program" problem-domain to create your struct-definition-based data model of the problem domain entity types.)
2. NAME YOUR DATA TYPES AFTER THE PRECISE NAMES OF DOMAIN ENTITY TYPES
Use the common (but precise) name of each kind of domain entity as the type-name of the corresponding struct definition.
3. METHODS - are functions/procedures specifically applicable to the attributes of a single struct type.
For each type of struct you have defined, define the interface signature of, and code for the implemention of, a set of functions which access the attributes of, set the attribute values of, or compute some function of the attributes of a single type of struct.
4. INHERITANCE
Object-oriented languages let you create a struct-type which is meant to represent a specific subtype of domain entity, whenever you have already created a struct-type (and its functions) to represent the common attributes shared by several subtypes of entity. That is, you have already created an abstract supertype struct definition to represent general properties of a general category of domain entity, now you want to add attributes (or specific values of attributes) that describe how different subtypes of the general entity differ from each other.
In an object oriented programming language, the subtype of struct can be created so that its definition references (mentions) the supertype struct type by name.
Then any in-memory instance of that subtype struct inherits all the attributes and applicable functions of the supertype struct definition. Then you add more, specific attributes, attribute value settings, and function interfaces or function implementations to the new subtype of struct you are creating.
5. PROGRAM WITH YOUR DOMAIN-ENTITY-MODELLING STRUCTS AND THEIR STRUCT-TYPE-SPECIFIC FUNCTION-SETS
To represent
Currently, EVs represent 0.115 % of motor vehicles on US roads and 0.06% worldwide.
That is, roughly 1 out of 1000 vehicles in the US and 1 out of every 1700 vehicles worldwide.
Remember that we are trying to keep global warming below 2 degrees Celsius and so far epic failing on that.
My proposal, consistent with climate prudence, is to keep using increased gas taxes until EVs become 50% of vehicles on the road, then and only then start transitioning to distance-travelled fees.
You are SUPPOSED to be incentivising the switch away from fossil fuel transportation now, and as you can see, there are miles and miles and miles to go on the transition plan.
Stopping the various EV incentives now is the kind of short term thinking insanity that got us into this mess in the first place.
Want to run a 24V DC "RV electrical system / yacht electrical system" from a DC sub-panel in my house running efficient DC fridge, LED lights, small inverter for laptops etc, and maybe a larger inverter for a diversion load in summer.
Also, our PV modules on our roof need to be entirely in parallel because lots of partial-array shading at various times of day.
So our input voltage range (to batteries) will be around 30V and the output should be 24V DC.
Anyone seen the spec. for input voltage range for the Tesla Powerwall?
Also, anyone know where one can get a 400V to 24V efficient and safe DC/DC converter for the output side of the Powerwall?
what could possibly go wrong?
Members of congress have a library? Don't they know libraries are full of liberals? "There's only one book worth reading!" I was pretty sure they stayed far away from libraries, and radical interwebs and such.
where they don't build grocery stores within walking distance.
That is soooo.... 1950s/60s/70s.
It's scientific knowledge.
It should be accessible to everyone, period, with the small exception, arguably, of extremely dangerous techniques such as methods of creating artificial super-viruses etc.
Science thrives by the collective discovery, review and improvement of knowledge. The more the disseminationof the knowledge is, the more valuable the knowledge becomes, and the more likely the knowledge is to improve faster.
Throughout history, some peoples' contribution has been to insert themselves as a toll troll on the bridge, even if the bridge was built by others. This is a despicable friction on the function of society.
Scientific paywalls (preventing access to science that was funded entirely or partially by the public purse) are a crime.
We need every available quality mind, rich or poor, on some of our scientific and engineering challenges today.
Why aren't there companies offering to put solar PV on your roof (e.g. even if you're poor), and you can pay them basically the standard utility rate for your electricity.
The company can make the difference in profit, after fixed costs. Such companies are operating in the US.
Meanwhile, solar infrastructure is built up, as it needs to be to reduce GHG emissions.
If you have one large lake located up high somewhere and can pump water uphill to it, problem solved.
Does Hawaii have any high ground? Thought so.
Or if you're concerned about ecosystem alteration due to changing water flows, then
if you have one very large hydrogen tank facility somewhere with an electrolysis system (new efficient designs are here or almost here) and fuel cells, problem solved.
Or if you have an ocean floor where you can store a whole bunch of large balloon bags full of air, problem solved.
It's true that these storage methods have a low round-trip energy efficiency, but that energy is coming from the fricking sun - photosynthetic life is about 2% efficient at using solar energy). PV with inefficient storage of its peak generation is still a way better idea than continuing to burn coal and gas to make electricity.
ummm.
Any batch of electrons with the same average voltage is fully substitutable for any other batch of the same number with the same average voltage, from an electrical power use perspective.
I'm not in favour of selling drinking water, but the situation is the same as if a water distribution network had N companies each pumping in water to the pipe network from their lake at a metered rate, and the water coming out the output pipes of the network was sold to a whole bunch of people. Not sure what you don't understand about how that should work as a market system, and how you would divide the revenues. Pretty damn simple really.
A good ale should be consumed at room temperature. That is, 10-14C : typical room temperature in the early evening in a medieval roadside inn.