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Clarifications on frogs and single photons

oritteropo says...

The article he links for support is the same one I found, and it points out that the rods in both human and frog retinas can detect a single photon... but in humans there is a neural filter to prevent us detecting a single photon, we require 5-9 photons within 100ms to detect a flash.

I seriously doubt that frog vision works as he described in the original video, but clearly there could be some creature out there for whom his hypothesis was correct... and either way it was quite a fun talk, even if one has to substitute a robotic frog for total verisimilitude.

He says in the comments that he addressed this on his walk, but that the audio of that part was unusable!

What Can Frogs See That We Can't?

oritteropo says...

Hmm... now you've made me curious too. I have found a few interesting pages, but nothing specifically about frog vision apart from mentions that it's sensitive.


  • How Stuff Works has a How frogs work article.
  • The Whole Frog Project provides a virtual frog for high school biology students, based on MRI data, mechanical sectioning, and some software to allow visualising of the anatomical structures of the intact animal.
  • The UW Sea grant site has a frogs page with resources for kids + teachers that has an origami frog (among other things).


I'm not quite as sure about the single photon claim. I found a Physicsworld.com article from September 2012 talking about using a single rod cell from a frog eye being used as an extremely sensitive detector which is able to detect a single photon, but according to the original Usenet Physics FAQ (I cite an updated version hosted at math.ucr.edu) human retinas can also respond to a single photon, but have a neural filter to block the signal unless 5 to 9 photons arrive within less than 100 ms.

References

Julie Schnapf, "How Photoreceptors Respond to Light", Scientific American, April 1987

S. Hecht, S. Schlaer and M.H. Pirenne, "Energy, Quanta and vision." Journal of the Optical Society of America, 38, 196-208 (1942)

D.A. Baylor, T.D. Lamb, K.W. Yau, "Response of retinal rods to single photons." Journal of Physiology, Lond. 288, 613-634 (1979)

rich_magnet said:

Also, I'm disappointed. I was hoping to learn about the optical/visual system of frogs.

The Punisher: Russian Bus Driver Deliberately Rams Cars

Sam Harris on Going to Heaven/Hell

shinyblurry says...

Jesus loves you and I love you. This is an extremely long post and I apologize. I am writing for anyone who is interested in critically examining the arguments Sam Harris makes and contrasting it to the actual truth as presented by the scripture. Sam has distorted this truth and the entire video is basically one long strawman argument.. I think that is you are going to utterly condemn something you should at least make a cursory effort to understand it. That's just me. I invite you guys to learn more about the scripture so that you can know the truth for yourself:

http://www.amazon.com/How-Read-Bible-All-Worth/dp/0310246040/ref=sr_1_2?s=books&ie=UTF8&qid=1360718403&sr=1-2&keywords=how+to+understand+the+bible

I'll answer some points..

Sam: The point of Christianity is to safeguard the eternal well being of eternal souls

You could perhaps categorize this as the main point, but there are many points to Christianity. I don't want to split hairs here; I am agreeing with Sam essentially but I just want to expand on it a bit. The main point of Christianity is to declare the gospel of Jesus Christ. That's what Jesus said when He began His ministry: "repent and believe the gospel". The gospel is that Jesus Christ, God in the flesh, came to Earth to live as one of us. Though He did not sin, He took all of our sins upon Himself on the cross so that we could be forgiven and have eternal life. The point of Christianity is Jesus, and having a personal relationship with Him. Everyone who comes to know Jesus will be born again and become a new person. There are many other points to this but I will stop here.

Sam: 9 million children die every year

Yes, this is true but most of these children, if not all of them, will be going to Heaven. Not one of them have been forgotten by God or will suffer an unjust fate. There is an age of accountability for every person, and it is different for every person. It all depends on the revelation God has given each particular person and their response to it. It is fairly certain though that most if not all children under the age of 12 will make it to Heaven automatically.

Sam in discussing the dying children brings up the problem of evil..which has been sufficiently answered by Plantigas free will defense:

http://videosift.com/video/Since-Evil-Suffering-Exist-A-Loving-God-Cannot

Sam mentions the grief of the parents and that their unanswered prayers are part of Gods plan..

First of all, God answers every prayer, He just doesn't always answer yes. An example of a prayer God answered no to was when Jesus was in the garden of gethsemane and was asking the Father to let Him bypass the cross. Though it surely grieved His heart, He answered no to that prayer. He answered no because He was esteeming us more than Himself, which is what sacrificial love looks like. A key part of the prayer of Jesus was "never the less, not my will, but your will".

Christians do not pray to the exclusion of Gods will. we don't necessarily know what is best for us, but we trust God that He knows, and so we always pray that His will be done, even above what may seem needful for me at that time.

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I will also address the grief. The fact of the matter is, the scripture makes it very clear that Christians will suffer grief and loss on a constant basis:

Matthew 24:9

Then you will be handed over to be persecuted and put to death, and you will be hated by all nations because of me.

1 Peter 4:12 Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened to you:

1 Peter 4:16 Yet if any man suffer as a Christian, let him not be ashamed; but let him glorify God on this behalf.


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Look at Pauls testimony:

1 Corinthians 11:24-28

Are they servants of Christ? (I am out of my mind to talk like this.) I am more. I have worked much harder, been in prison more frequently, been flogged more severely, and been exposed to death again and again.

Five times I received from the Jews the forty lashes minus one.

Three times I was beaten with rods, once I was stoned, three times I was shipwrecked, I spent a night and a day in the open sea,

I have been constantly on the move. I have been in danger from rivers, in danger from bandits, in danger from my own countrymen, in danger from Gentiles; in danger in the city, in danger in the country, in danger at sea; and in danger from false brothers.

I have labored and toiled and have often gone without sleep; I have known hunger and thirst and have often gone without food; I have been cold and naked.

Besides everything else, I face daily the pressure of my concern for all the churches.


If you read Foxes Book of the Martyrs (http://www.ccel.org/f/foxe/martyrs/home.html) you will see that Christians are no strangers to suffering and grief. It is clearly taught in His word it will happen, which makes this argument have no weight at all and is simply a strawman.

Sam said that any God who would allow pain either can do nothing or doesnt care to so He is either impotent or evil

This is simply a false dichotomy. God may allow pain for a good reason, which is for the greater good. I'll give you an example:

This is Nick Vujicic, a man with no arms and no legs: http://www.youtube.com/watch?v=ZXlCeKBWfaA

He is a motivational speaker and he has traveled around the world and inspired millions. Pretty much anyone who has a problem can relate to this man because Nick has overcome his extreme adversity with grace and he finds joy in his daily life. If God had answered Nicks prayer to be healed, then millions of people would have been robbed of the fruit that overcoming his adversity bore in his life. This is an example of how God can use pain for a greater good.

Sam asks what about all those who are praying to the wrong God, through no fault of their own..that they missed the revelation

This is just simply false..Sam seems to think that there are no reasonable answer to these questions when the real problem is his ignorance of Christian theology.

Romans 1:18-21

The wrath of God is being revealed from heaven against all the godlessness and wickedness of men who suppress the truth by their wickedness, since what may be known about God is plain to them, because God has made it plain to them. For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that men are without excuse.

For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened.


The word of God states that every man coming into the world is given light, and that God makes it clear to them one way or the other that He exists. Every man, woman and child dying after the age of accountability and heading towards hell had received a personal revelation from God as to His existence. How they responded to that light determined what Gods next move was. If they had responded in the affirmitive, He could have then opened the door for them to know Jesus and be saved. Since they responded in the negative, they did not receive any further revelation and died in their sins.

So again Sam creates a strawman argument when he says that they missed the revelation through no fault of their own. The truth is that they received the revelation and rejected it. He also made it sound like people are just randomly born into the world when what the scripture says is that God appoints the times and places for every human being. There are no accidents about where you are born; it is simply that God is not limited by time and space. He is omnipresent and not limited to any particular locality.

Sam accused God creating the cultural isolation of the hindus - of orchaestrating their ignorance

The truth is that in the beginning all men knew God and that over time as men formed nations they moved farther and farther away from the truth about God and invented their own gods to worship. The hindus isolated themselves, though again this is not a limitation on God. He has reached out to every hindu who has ever lived and the ones who ended up in hell are the ones who rejected Him. You have to push past the love, grace and mercy of God to get to hell.

Sam mentions how a serial killer could get saved while an innocent perishes elsewhere:

What the bible says is this:

Romans 3:23

for all have sinned and fall short of the glory of God,


There aren't any innocents over the age of accountability. The man who has cheated on his wife is equally guilty in Gods eyes as the man who murdered his wife. What God calls good is not a relative standard like human beings use, as we compare ourselves to eachother and think we are good people because we haven't done the big two (rape, murder). What God calls good is moral perfection and what He calls evil is everything that falls short of that, even one sin. He also says that if you hate someone you have murdered them in your heart and you are a murderer at heart. Sam does not appear to understand what the bible says Gods standards actually are.

Sam said that there is absolutely nothing in Christianity to do with moral accountability

Again, this is false. What the bible says is that we're morally accountable to God for every sin we've ever committed, and your conscience will tell you that. It is not other people we have offended, it is God Almighty. What Sam seems to have a problem with is Gods absolute standard for moral accountability versus his relative standard (which conveniently excuses his sins against God)

Sam said there is a conflict between God being intrinsically good and what he describes as the "visitation of cruel unjust suffering on innocent people"

I've already answered this by point out there are no innocent people over the age of accountability. I would also like to add that God created a perfect world, and the reason there is sin in this world is because of mankind. The reason the world is the way it is today is exclusively because of the daily crimes of humanity (can you even begin to imagine the amount of evil that transpires on planet earth in one day?) and not because God wanted it that way.

Sam says it is a cop out to say God is mysterious and then use merely human understanding to establish goodness

Actually, what Sam has done here is create a distorted image of God by twisting or ignoring what the scripture says about Him, and the fate of human beings. Then he points to this grotesque image to condemn the true and living God who is in fact perfectly good. The truth is that His goodness is upheld entirely when you are looking at the true God through a sound understanding of scripture and not the distorted image Sam has created of Him.

Sam says its a cop out to be told God is mysterious to justify untold suffering

He is right here, it is a cop-out..and anyone making such an argument has a weak understanding of the bible. Gods will for us is actually no mystery; God makes it crystal clear what He expects from His creation, and kinds of things we will face. He is even gracious enough to tell us what will happen in the future, thousands of years in advance:

http://www.christadelphianals.org/bible_prophecy.htm

Sam says it is utter hubris and even reprehensible to think you're special because "God loves me don't you know"

Yet even little children understand that no one is worthy to be pardoned for their sins and no one can make it into Heaven on their own. There is absolutely no difference between me and anyone else except for one thing; I said yes to God, and some others say no. I am not worthy, in fact I am decidedly unworthy and I deserve the exact same punishment as everyone else does; the difference is that I accept the free gift of grace that Jesus offers upon the cross. God proved His love for all people on the cross, and He died for every single person, not just me. Jesus loves you more than you can understand.

Sam says it is morally reprehensible for Christians to drudge up some trivial circumstance God took care of while completely ignoring the suffering of other human beings

Sam is right about this and it is a complete shame to Christians everywhere that the western church is so materialistic and base in their feelings. Jesus called us to live a life of total sacrifice and to give up everything we have. I can tell you that God is even more appalled than Sam is about this issue.

Sam asserted that the bible supports slavery

This is false; the bible does not support slavery. Slavery as we understand it today is not the same as it was in the time this was written. In those times it was more of a profession and people would sell themselves into slavery so they could have food and shelter. The bible regulated these activities, but it also said that there was no difference between master and slave and that we are all equal in Christ Jesus. I will also point out that modern slavery was ended by Christians.

Sam says that the bible admonishes us to kill people for witchcraft

No, it does not admonish Christians to kill witches, or anyone else. There is no commandment for any Christians to murder anyone. It is true, however, that in the time of the Old Covenant, God set up laws for Israel which were very strictly enforced with the punishment of death. This was not anything that He ever imposed on the world, or any other people except the Jews. He also did not impose it on them: the Jews made a covenant with God to obey all of His laws, so that He would be their God, and they would be His people.

Sam says that there is absolutely nothing anyone can say against Muslims if they prayed to the right God

The God of the bible is not morally inconsistant, whereas the god of the muslims is.

Sam said Christianity is what only lunatics could believe on their own

The bible says this:

1 Corinthians 1:18

For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.


The scripture itself says that unsaved people will find the message of the cross foolish. This is the evidence that you are perishing. The things of the Spirit of God are foolish to the natural man, neither can he understand them, because they are spiritually discerned.

Sam made a little quip about catholicism

While I am sure there are saved catholics, the church itself departed from the true teachings of Jesus a long time ago.. There is also no teaching in the scripture regarding the Eucharist.

Sam said its very strange salvation depends bad evidence

God gives everyone good evidence that He exists but they suppress the truth. God reveals Himself through personal revelation. You cannot know God otherwise.

Sam says Christianity is a cult of human sacrifice

Jesus wasn't sacrificed against His will:

John 10:18

No one can take my life from me. I sacrifice it voluntarily. For I have the authority to lay it down when I want to and also to take it up again. For this is what my Father has commanded."


He gave His life just as firemen have given their lives trying to save people from a burning building. Jesus didn't have to go to the cross but He did it out of love for us:

John 15:13

Greater love hath no man than this, that a man lay down his life for his friends.


Sam says the bible doesnt repudiate human sacrifice, that it celebrates it

Actually, it does repudiate it in many locations. The practice of sacrificing humans was utterly condemned in scripture. Jesus voluntarily giving Himself for the sins of the world does not resemble what Sam is implying even superficially.

Sam states that people used to bury children under the foundation of buildings and then says "these are the sorts of people who wrote the bible"

The kind of people who wrote the bible were eye witnesses to the life death and resurrection of Jesus Christ. They did not bury children under foundations; they followed the true and living God.

Sam said that if there is a less moral moral framework he hadn't heard of it

As he has presented it, most certainly, but the problem is that he largely invented it from his misunderstanding of Christian theology and personal prejudices.

The true question is this: are you an honest or dishonest skeptic? If you're an honest skeptic you will investigate, but a dishonest skeptic doesn't want to know. You will have to admit that you do not know whether God answers prayer or not, so here is a possible clue to knowledge:

Pray this: God, I don't know if you're there or not, and I don't know if the bible is your word or not. I am asking you to reveal the truth to me, and if you do, I promise to follow it where ever it leads. If it leads to Jesus, I will give my life to Him and follow Him.

After praying this, read the gospel of John. Read it slowly, a little at a time, each time beforehand praying that God will give you revelation concerning what you're reading. If you do this, by the time you reach the end of the gospel your skepticism will have grown wings and flown away.

God bless.

How a Turbocharger Works

charliem says...

You can afford...being the prime question here.
Most cars these days (read: not performance cars) are made on the cheap.
Forged connecting rods, and billet valves / cam shafts / high tensile head bolts are not cheap, therfore they dont go into the vast majority of modern engines.

Putting a turbo on your engine alone would vastly increase compression ratios, stressing just about every internal part in the car. The poverty pack econo-cars can not handle any more than about 4-6lb's of boost before things start heating up, warping, and shaking themselves apart violently.

Cost to get things up to spec?

erm....well a good set of H beam forged con-rods can cost you anywhere from 600 upwards (generally upwards...a lot upwards), and thats just the part, not including installation. Getting the valves reworked, vavle springs, cam shaft....thats ~2k+ if youre doing it on the cheap.

Then you need an intercooler to take the heat out of the intake air (as the turbo compresses intake air, and therfore heats it up) so as to keep the economy levels up....and piping to go with it, your looking at another 1k at least.

Then you need an ECU mod, piggy back if you can get away with it, around the 1k figure, otherwise a full standalone can cost upwards of 1.5k.

Then you need to program and tune, upwards again of 1.5k.

To turbo a non-turbo economy engine povery-pack car, you are looking at LEAST 5k+, and thats doing it on mega budget, you wont get any reliability or safety out of it.

Before you even get to put the turbo on, which itself is about 300-1.5k depending on what turbine you purchase, you also need a turbo manifold to redirect all of the exhaust gas into a turbo, and have an outlet pipe that allows waste-gate dumps into your exhaust. So you also need to get your cat-back system redone too, which is about 700-1500 to get it done right.

Doing it right? Start counting from 10k....and keep going.

Doing it right would be to upgrade the breaks (bigger discs, bigger calipers, bigger master cylinder), the suspension (coilovers), and doing some serious chassis strengthening to take the increased loads (front/rear sway bar upgrades, front/rear strut tower bars etc..)

Its not cheap unfortunately

chingalera said:

Q: What's the best turbocharger on the market available in a car you can afford?

Seconds From Disaster : Meltdown at Chernobyl

GeeSussFreeK says...

@radx No problem on the short comment, I do the exact same thing

I find your question hard to address directly because it is a series of things I find kind of complexly contradictory. IE, market forces causing undesirable things, and the lack of market forces because of centralization causing undesirable things. Not to say you are believing in contradictions, but rather it is a complex set of issues that have to be addressed, In that, I was thinking all day how to address these, and decided on an a round about way, talking about neither, but rather the history and evolution as to why it is viewed the way you see it, and if those things are necessarily bad. This might be a bit long in the tooth, and I apologize up front for that.

Firstly, reactors are the second invention of nuclear. While a reactor type creation were the first demonstration of fission by humans (turns out there are natural fission reactors: Oklo in Gabon, Africa ), the first objective was, of course, weapons. Most of the early tech that was researched was aimed at "how to make a bomb, and fast". As a result, after the war was all said and done, those pieces of technology could most quickly be transitioned to reactor tech, even if more qualified pieces of technology were better suited. As a result, nearly all of Americas 104 (or so) reactors are based on light water pressure vessels, the result of mostly Admiral Rickover's decision to use them in the nuclear navy. This technological lock in made the big players bigger in the nuclear field, as they didn't have to do any heavy lifting on R&D, just sell lucrative fuel contracts.

This had some very toxic effects on the overall development of reactor technology. As a result of this lock-in, the NRC is predisposed to only approving technology the resembles 50 year old reactor technology. Most of the fleet is very old, and all might as well be called Rickover Reactors. Reactors which use solid fuel rods, control rods, water under pressure, ect, are approved; even though there are some other very good candidates for reactor R&D and deployment, it simply is beyond the NRCs desire to make those kinds of changes. These barriers to entry can't be understated, only the very rich could ever afford to attempt to approve a new reactor technology, like mutli-billionaire, and still might not get approved it it smells funny (thorium, what the hell is thorium!)! The result is current reactors use mostly the same innards but have larger requirements. Those requirements also change without notice and they are required to comply with more hast than any industry. So if you built a reactor to code, and the wire mesh standards changed mid construction, you have to comply, so tear down the wall and start over unless you can figure out some way to comply. This has had a multiplication effect on costs and construction times. So many times, complications can arise not because it was "over engineered", but that they have had to go super ad-hawk to make it all work due to changes mid construction. Frankly, it is pretty amazing what they have done with reactor technology to stretch it out this long. Even with the setbacks you mention, these rube goldbergian devices still manage to compete with coal in terms of its cost per Kwh, and blow away things like solar and wind on the carbon free front.

As to reactor size LWRs had to be big in the day because of various reasons, mostly licencing. Currently, there are no real ways to do small reactors because all licencing and regulatory framework assumes it is a 1GW power station. All the huge fees and regulatory framework established by these well engineered at the time, but now ancient marvels. So you need an evacuation plan that is X miles wide ( I think it is 10), even if your reactor is fractionally as large. In other words, there is nothing technically keeping reactors large. I actually would like to see them go more modular, self regulating, and at the point of need. This would simplify transmission greatly and build in a redundancy into the system. It would also potentially open up a huge market to a variety of different small, modular reactors. Currently, though, this is a pipe dream...but a dream well worth having and pushing for.

Also, reactors in the west are pretty safe, if you look at deaths per KWH, even figuring in the worst estimates of Chernobyl, nuclear is one of the best (Chernobyl isn't a western reactor). Even so, safety ratcheting in nuclear safety happens all the time, driving costs and complexity on very old systems up and up with only nominal gains. For instance, there are no computer control systems in a reactor. Each and every gauge is a specific type that is mandated by NRC edict or similar ones abroad (usually very archaic) . This creates a potential for counterfeiter parts and other actions considered foul by many. These edicts do little for safety, most safety comes from proper reactor design, and skillful operation of the plant managers. With plants so expensive, and general costs of power still very competitive, Managers would never want to damage the money output of nuclear reactors. They would very much like to make plant operations a combination of safe, smooth, and affordable. When one of those edges out the other, it tends to find abuses in the real world. If something gets to needlessly costly, managers start looking around for alternatives. Like the DHS, much of nuclear safety is nuclear safety theater...so to a certain extent, some of the abuses don't account for any real significant increase in risk. This isn't always the case, but it has to be evaluated case by case, and for the layperson, this isn't usually something that will be done.

This combination of unwillingness to invest in new reactor technology, higher demands from reactors in general, and a single minded focus on safety, (several NRC chairmen have been decidedly anti-nuclear, that is like having the internet czar hate broadband) have stilted true growth in nuclear technology. For instance, cars are not 100% safe. It is likely you will know someone that will die in a car wreak in the course of your life. This, however, doesn't cause cars to escalate that drastically in safety features or costs to implement features to drop the death rate to 0. Even though in the US, 10s of thousands die each year in cars, you will not see well meaning people call for arresting foam injection or titanium platted unobtanium body frames, mainly because safety isn't the only point of a car. A car, or a plane, or anything really, has a complicated set of benefits and defects that we have to make hard choices on...choices that don't necessarily have a correct answer. There is a benefit curve where excessive costs don't actually improve safety that much more. If everyone in the USA had to spend 10K more on a car for form injection systems that saved 100 lives in the course of a year, is that worth it? I don't have an answer there as a matter of fact, only opinion. And as the same matter of opinion on reactors, most of their cost, complication, and centralization have to do with the special way in which we treat reactors, not the technology itself. If there was a better regulatory framework, you would see (as we kind of are slowly in the industry despite these things) cheaper, easier to fabricate reactors which are safer by default. Designs that start on a fresh sheet of paper, with the latest and greatest in computer modeling (most current reactors were designed before computer simulations on the internals or externals was even a thing) and materials science. I am routing for the molten salt, thorium reactors, but there are a bunch of other generation4 reactors that are just begging to be built.

Right now, getting the NRC to approve a new reactor design takes millions of dollars, ensuring the big boy will stay around for awhile longer yet. And the regularly framework also ensures whatever reactor gets built, it is big, and that it will use solid fuel, and water coolant, and specific dials and gauges...ect. It would be like the FCC saying the exact innards of what a cellphone should be, it would be kind of maddening to cellphone manufacturers..and you most likely wouldn't have an iPhone in the way we have it today. NRC needs to change for any of the problems you mentioned to be resolved. That is a big obstacle, I am not going to lie, it is unlikely to change anytime soon. But I think the promise of carbon free energy with reliable base-load abilities can't be ignored in this green minded future we want to create.

Any rate, thanks for your feedback, hopefully, that wasn't overkill

Wendy O. Williams- It's My Life

deathcow says...

Wow... from Wikipedia:

Williams had first attempted suicide in 1993 by hammering a knife into her chest; the knife lodged in her sternum and she changed her mind, calling Swenson to take her to hospital.[5] She attempted suicide again in 1997 with an overdose of ephedrine.[5]

Williams died at age 48 on April 6, 1998 of a self-inflicted gunshot wound in a wooded area near her home. Rod Swenson, who had been Wendy's significant other for more than twenty years, returned from shopping to the wooded area where the two had lived since moving to Connecticut from New York. He found a package that Wendy had left him with some special noodles he liked, a packet of seeds for growing garden greens, some oriental massage balm, and sealed letters from Wendy. The suicide letters which included a "living will" denying life support, a love letter to Swenson, and various lists of things to do set Swenson searching the woods looking for her. After about an hour, and after it was almost dark, he found the body in woods near an area where she loved to feed the wildlife. Several nut shells were on a nearby rock where she had apparently been feeding some of the squirrels before she died. Swenson checked the body for a pulse, and there was none. A pistol lay on the ground nearby, and he returned to the house to call the local authorities. "Wendy's act was not an irrational in-the-moment act," he said, she had been talking about taking her own life for almost four years. Swenson reportedly described her as "despondent" at the time of her suicide.[13] This is what she is said to have written[14] in a suicide note regarding her decision:
“ I don't believe that people should take their own lives without deep and thoughtful reflection over a considerable period of time. I do believe strongly, however, that the right to do so is one of the most fundamental rights that anyone in a free society should have. For me, much of the world makes no sense, but my feelings about what I am doing ring loud and clear to an inner ear and a place where there is no self, only calm.

It's NOT Football Dammit!

A Glimpse of Eternity HD

shinyblurry says...

You tell me that you understand science, and were once very scientific, then you drop --excuse me-- a giant turd like this. I could as easily say, "If the Theory of Evolution is correct, then all living creatures are evidence of Theory of Evolution's correctness," and it would still be a meaningless statement because if we already know something is true (as in the premise), then evidence is redundant. It's precisely when we don't know something that evidence becomes useful. This is probably the hardest part about talking to you -- your weak grasp on how science and logic work. And don't take this as an internet ad hom. I'm being straight with you, really. It's not your strong suit. Own it.

Actually, I think that it is you who is demonstrating a weak grasp of logic here. It seems that what I was getting at went right over your head. What you've done here is rip my statement out of its context, and then claimed I was using it in a meaningless way that I never intended. It is a straw man argument, really, and yes you did use ad homs. A giant turd? Saying that its really hard to talk to me because of my weak grasp of science and logic? Come on. I had thought that our dialogue had transcended these kind of petty caricatures.

In context, the statement is designed to get you think outside the box you're in and weigh both sides of the issue equally. It's not an argument in itself. The statement that if God exists, everything that exists is empirical evidence for God is a logically valid statement. If God exists, everything you're looking at right now if proof that He exists. Obviously, this statement by itself doesn't help you determine whether God actually exists or not. You could just as easily say that if God doesn't exist, everything that does exist is proof that He doesn't exist. Therefore, the question is, how would you tell if you're in a Universe that God designed?

The real question is, why is either possibility more or less likely than the other? You haven't addressed this, but simply have taken a leap of faith in favor of your atheistic naturalism. You say, I don't see the Planner, and I didn't see the Planner make this Universe, therefore it is not designed until proven otherwise. The problem with this is that you can't even begin to justify this assumption until you can explain why either possibility is any more likely than the other. You can't say you don't see any empirical evidence because it might be staring you in the face everywhere you look. To analyze how either possibility is more likely than the other you have to discard your assumptions about what you have seen or haven't seen and think about this on a deeper level.

Taking it a step deeper, the fact is, you would only expect to see exactly what you do see, because you are in fact a created being. A created being should expect to find himself existing in an environment capable of creating him. The crux is though that this environment is also finely tuned. You should expect to see what you do, but you should also be surprised to find that it is finely tuned. It a bit like being taken out for execution in front of a firing squad of 100 expert marksmen 3 feet away, and finding yourself alive after all of them opened fire. You should not be surprised to find yourself alive, because obviously you would have to be alive to find yourself alive, but you should be surprised to find that 100 expert marksmen missed you from 3 feet away. In the same way, you should be surprised to find yourself to be a created being in a finely tuned Universe.

What you have on your hands is a Universe full of empirical evidence that it was or wasn't designed. There are only two possibilities; the Universe was either planned or unplanned. Again, how would you tell the difference? What would you expect to see which is different from what you do see? What would make either possibility more likely? That is the point. A finely tuned Universe should tip the scales of that evidence, if you are being honest about what you can really prove.

Supernatural creation is easier to understand, but just about any other explanation is as or more plausible. When you consider some of the extreme coincidences that are required for us to exist, it stretches the mind. But we've had billions of years to evolve, and if we're talking about the whole universe, it could be that 10^one trillion universes with different physical properties have formed and collapsed, and when a balanced one finally came out of the mix, it stuck around, and here we are.

It could be, except there is no evidence there is. Why is it you that can imagine an infinite number of hypothetical Universes with no evidence, but you object to supernatural creation as somehow being less plausible than that? There is no evidence that it is less plausible, you simply assume it is. Sure, if you use your magic genie of time and chance you could imagine just about anything could happen. Scientists agree:

Given so much time, the impossible becomes possible, the possible probable, and the probable virtually certain. One has only to wait: time itself performs the miracles.

George Wald, Nobel Laureate, Harvard
Physics and Chemistry of Life p.12

The odds of any of this happening by itself far exceeds the number of atoms in the Universe, and there is no actual proof that it actually could happen by itself, but you still believe it to be more plausible. Why is that? In the end, why is it plausible that anything would exist at all? Why isn't everything equally unlikely in the end? Notice what George Wald said? He said time itself performs the *miracles*. He said that because the existence of life is nothing short of a miracle, but even knowing that, you would still say God is implausible. I think these arguments are what is implausible.

Look at how these scientists come to the same conclusions as you have:

http://www.pbs.org/wgbh/nova/physics/blog/2012/03/is-the-universe-fine-tuned-for-life/

They acknowledge there are only two possibilities, one being God, but since they hate that possibility more than they hate embracing the anthropic principle, they go with that instead, having absolutely no evidence to base that conclusion on. They simply don't want to acknowledge the obvious, which is that a finely tuned Universe is *much* stronger evidence for an omnipotent God than it is for multiple Universes.

I would take a declarative statement about him, and see what implications it had, what predictions it made, then see if they were testable, either theoretically or practically. Like theoretically if God is omniscient, it means he knows everything, and if I can find an example of something he absolutely cannot know, then I've proven he's not omniscient.

What God says is that as the Heavens are higher than the Earth, so are His ways above our ways, and His thoughts above our thoughts. He also calls the wisdom of this world, foolishness. So God has directly said that it is only by His revelation and not our understanding that we can come to know Him. A limited temporal creature, trying to disprove Gods existence with his own corrupt reasoning is kind of laughable, isn't it?

In any case, it's easy to think of things God doesn't know or can't do. God doesn't know what it feels like to not exist. God can't remember a time that He didn't exist. God can't make a square circle, or an acceptable sin. This doesn't prove anything. A better definition would be, omniscience is knowing everything that can be known, and omnipotence is being able to do everything that can be done.

Or practically, if God answers prayers, then I can test that statistically. Now, you say that God refuses to be tested, but that also means that if people are sincerely praying, but someone else is measuring the effects of those prayers, that God will choose not to answer those prayers, "Sorry! I'm being tested for, so I can't help you out today." This puts the power of denying God's prayers in the hands of scientists -- ridiculous. So there's two tests for God.

Or perhaps He had sovereignly arranged for only insincere prayers or prayers outside of His will to be prayed for at that time which would give the results of the test the appearance of randomness.

This is self-fulfilling prophecy. The only reason the Jewish people came back to form a country again is because their holy book said they were entitled to do so, divine providence. Like Macbeth likely never would have become king of Scotland if he hadn't been told so by the Weird Sisters.

The Jews are historically from Israel, and there is archaeological evidence to prove this. The reason they came back to Israel is because it is historically their homeland. Given the opportunity, they would have come back to Israel with or without the bible saying they were entitled to. The point is that they were predicted to come back, not only around the date that they did, but their migration pattern was in the exact order, their currency was predicted, their economic and agricultural condition was predicted, and many other things.

I'm no biblical scholar, but I found three places where the destruction of Jerusalem is predicted. The first is in Micah 3:11-12, where it simply states that it will happen at some point. It doesn't say when, nor describe any of the circumstances. The second one I found is Daniel 9:24-26, where there's some detail that sounds kinda like Jesus, except that it was supposed to happen within 70 weeks (16 months) of when God spoke to Daniel, roughly 530 years BC. Or if you understand that the signal to begin the 70 weeks hadn't been issued yet, then Jerusalem was to have been build a mere 16 months before it was destroyed by Titus, which clearly isn't the case either. It also predicts the end will be by flood, but it was by fire, and then manual labour of soldiers, if Josephus' account is to be believed (he wasn't impartial).

The 70 weeks are not concurrent, first of all. Second, Jesus is the one who predicted the fall of Jerusalem:

Luk 19:41 And when he drew near and saw the city, he wept over it,
Luk 19:42 saying, "Would that you, even you, had known on this day the things that make for peace! But now they are hidden from your eyes.
Luk 19:43 For the days will come upon you, when your enemies will set up a barricade around you and surround you and hem you in on every side
Luk 19:44 and tear you down to the ground, you and your children within you. And they will not leave one stone upon another in you, because you did not know the time of your visitation."

I would have to accept Jesus as messiah before I could accept this argument. And if I had already accepted him as messiah, then the argument would be meaningless, just like the one about the universe as evidence for God's existence.

I'll rephrase this by saying, that Jesus fulfilled dozens of prophecies about the coming of the Messiah. Clearly, the impact of that Jesus has had on the world matches His claims about who He is. Consider this quotation by Napoleon:

"What a conqueror!--a conqueror who controls humanity at will, and wins to himself not only one nation, but the whole human race. What a marvel! He attaches to himself the human soul with all its energies. And how? By a miracle which surpasses all others. He claims the love of men--that is to say, the most difficult thing in the world to obtain; that which the wisest of men cannot force from his truest friend, that which no father can compel from his children, no wife from her husband, no brother from his brother--the heart. He claims it ; he requires it absolutely and undividedly, and he obtains it instantly.

Alexander, Caesar, Hannibal, Louis XIV strove in vain to secure this. They conquered the world, yet they had not a single friend, or at all events, they have none any more. Christ speaks, however, and from that moment all generations belong to him; and they are joined to him much more closely than by any ties of blood and by a much more intimate, sacred and powerful communion. He kindles the flame of love which causes one's self-love to die, and triumphs over every other love. Why should we not recognize in this miracle of love the eternal Word which created the world? The other founders of religions had not the least conception of this mystic love which forms the essence of Christianity.

I have filled multitudes with such passionate devotion that they went to death for me. But God forbid that I should compare the enthusiasm of my soldiers with Christian love. They are as unlike as their causes. In my case, my presence was always necessary, the electric effect of my glance, my voice, my words, to kindle fire in their hearts. And I certainly posses personally the secret of that magic power of taking by storm the sentiments of men; but I was not able to communicate that power to anyone. None of my generals ever learned it from me or found it out. Moreover, I myself do not possess the secret of perpetuating my name and a love for me in their hearts for ever, and to work miracles in them without material means.

Now that I languish here at St Helena, chained upon this rock, who fights, who conquers empires for me? Who still even thinks of me? Who interests himself for me in Europe? Who has remained true to me? That is the fate of all great men. It was the fate of Alexander and Caesar, as it is my own. We are forgotten, and the names of the mightiest conquerors and most illustrious emperors are soon only the subject of a schoolboy's taks. Our exploits come under the rod of a pedantic schoolmaster, who praises or condemns us as he likes.

What an abyss exists between my profound misery and the eternal reign of Christ, who is preached, loved, and worshipped, and live on throughout the entire world. Is this to die? Is it not rather to live eternally? The death of Christ! It is the death of a God."

Nope. Eternal means within all time. It implies that such an entity wouldn't necessarily exist outside of time. Maybe you meant a different word, but "eternal" doesn't describe whoever created time, if words have meaning.

Words do have meaning. Check any dictionary; the definition I used is there:

e·ter·nal/i't?rnl/
Adjective:

Lasting or existing forever; without end or beginning.
(of truths, values, or questions) Valid for all time; essentially unchanging.

What is this (especially the bits in bold) based on? It this biblical? Your intuition?

Isaiah 29:13

The Lord says: "These people come near to me with their mouth and honor me with their lips, but their hearts are far from me. Their worship of me is made up only of rules taught by men

1 Samuel 16:7

But the LORD said to Samuel, "Do not consider his appearance or his height, for I have rejected him. The LORD does not look at the things man looks at. Man looks at the outward appearance, but the LORD looks at the heart

You can give God all of the lip service you want, but He is only interested in what is in your heart.

Yes, the Lord will test your sincerity:

1 Peter 1:6-7

In this you greatly rejoice, though now for a little while you may have had to suffer grief in all kinds of trials.

These have come so that your faith--of greater worth than gold, which perishes even though refined by fire--may be proved genuine and may result in praise, glory and honor when Jesus Christ is revealed.

Also, if God knows everything, then what could he possibly be "testing" for? You only need to test things if you don't already know. And if he does know, the he's just messing with my head, in which case, it's not a test.

The metaphor that is used for testing is that of impurities being refined out of gold or silver. Tests are to prove your sincerity, not necessarily what God knows.

>> ^messenger

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Neil deGrasse Tyson -why no metric system on Nova ScienceNow

steroidg says...

>> ^jbaber:

Why you should learn to love the metric system.


After reading that link, I think he raised a few good points such as nautical miles, and chopping wood but I still don't see that much advantage of imperial over metric. By example:

Fahrenheit degrees are a 0-100 scale of normal temperature: 0° is quite cold, 100° is quite hot.

Celcius 0° is water freezing and 100° is water boiling at 1 atmosphere, isn't that more intuitive than quite cold and quite hot? You can even use water to measure temperature.

Traditional units naturally express an estimation's margin of error.
Because there are units for every scale, my choice of units expresses my confidence in an estimate. Telling you my couch is about 10 ft. 6 in. wide expresses more confidence than saying it is about 10 ft. wide. Because metric units differ by such great amounts, there is often no way to do this. I must say my couch is about 3 meters or 300cm wide. The former implies my margin of error is 1 meter, and the latter that it's 1cm. In reality, I must depend on the roundness of 300 to imply that my margin of error is 10cm.


Err, what about saying it's about 3.3 meters? You can be as vague or precise as you want with metric. How is it intuitive if you can't express the measurement with fraction?

The steps between units are often small and intuitive.... ...A few feet is a yard. A few yards is a rod. A few rods is a chain. 10 chains is a furlong. 8 furlongs is a mile.

What? How is that intuitive? How do you trust measures when you can say a few something is a another thing? How many is a few?

To me, most arguments are about "Imperial is good because I'm familiar with the notions.", which can apply to any deprecated local standard and shouldn't be used as proof of being intuitive.

FYI, I grew up in China that uses another local system which nobody else use. I never liked it even though it mostly uses the power of 10 like the metric system. It's just too arbitrary of a scale to be any use other than understanding what old people is trying to say.

You've been trumped - Theatrical Trailer

EMPIRE says...

Trump is so much the epitome of the vain, self-centered, horrible person, moron, type of capitalist, it's amazing. He's like a lightning rod of bad personality traits.

edit: Oh, and a liar... I almost forgot. And a terrible one at that. And bad taste. Geez, the man has some shitty taste.

ReverendTed (Member Profile)

GeeSussFreeK says...

Safe nuclear refers to many different new gen4 reactor units that rely on passive safety instead of engineered safety. The real difference comes with a slight bit of understanding of how nuclear tech works now, and why that isn't optimal.

Let us first consider this, even with current nuclear technology, the amount of people that have died as a direct and indirect result of nuclear is very low per unit energy produced. The only rival is big hydro, even wind and solar have a great deal of risk compared to nuclear as we do it and have done it for years. The main difference is when a nuclear plant fails, everyone hears about it...but when a oil pipeline explodes and kills dozens, or solar panel installers fall off a roof or get electrocuted and dies...it just isn't as interesting.

Pound per pound nuclear is already statistically very safe, but that isn't really what we are talking about, we are talking about what makes them more unsafe compared to new nuclear techs. Well, that has to do with how normal nukes work. So, firstly, normal reactor tech uses solid fuel rods. It isn't a "metal" either, it is uranium dioxide, has the same physical characteristics as ceramic pots you buy in a store. When the fuel fissions, the uranium is transmuted into other, lighter, elements some of which are gases. Over time, these non-fissile elements damage the fuel rod to the point where it can no longer sustain fission and need to be replaced. At this point, they have only burned about 4% of the uranium content, but they are all "used up". So while there are some highly radioactive fission products contained in the fuel rods, the vast majority is just normal uranium, and that isn't very radioactive (you could eat it and not really suffer any radiation effects, now chemical toxicity is a different matter). The vast majority of nuclear waste, as a result of this way of burning uranium, generates huge volumes of waste products that aren't really waste products, just normal uranium.

But this isn't what makes light water reactors unsafe compared to other designs. It is all about the water. Normal reactors use water to both cool the core, extract the heat, and moderate the neutrons to sustain the fission reaction. Water boils at 100c which is far to low a temperature to run a thermal reactor on, you need much higher temps to get power. As a result, nuclear reactors use highly pressurized water to keep it liquid. The pressure is an amazingly high 2200psi or so! This is where the real problem comes in. If pressure is lost catastrophically, the chance to release radioactivity into the environment increases. This is further complicated by the lack of water then cooling the core. Without water, the fission chain reaction that generates the main source of heat in the reactor shuts down, however, the radioactive fission products contained in the fuel rods are very unstable and generate lots of heat. So much heat over time, they end up causing the rods to melt if they aren't supplied with water. This is the "melt down" you always hear about. If you start then spraying water on them after they melt down, it caries away some of those highly radioactive fission products with the steam. This is what happened in Chernobyl, there was also a human element that overdid all their safety equipment, but that just goes to show you the worst case.

The same thing didn't happen in Fukushima. What happened in Fukushima is that coolant was lost to the core and they started to melt down. The tubes which contain the uranium are made from zirconium. At high temps, water and zirconium react to form hydrogen gas. Now modern reactor buildings are designed to trap gases, usually steam, in the event of a reactor breach. In the case of hydrogen, that gas builds up till a spark of some kind happens and causes an explosion. These are the explosions that occurred at Fukushima. Both of the major failures and dangers of current reactors deal with the high pressure water; but water isn't needed to make a reactor run, just this type of reactor.

The fact that reactors have radioactive materials in them isn't really unsafe itself. What is unsafe is reactor designs that create a pressure to push that radioactivity into other areas. A electroplating plant, for example, uses concentrated acids along with high voltage electricity in their fabrication processes. It "sounds" dangerous, and it is in a certain sense, but it is a manageable danger that will most likely only have very localized effects in the event of a catastrophic event. This is due mainly to the fact that there are no forces driving those toxic chemical elements into the surrounding areas...they are just acid baths. The same goes for nuclear materials, they aren't more or less dangerus than gasoline (gas go boom!), if handled properly.

I think one of the best reactor designs in terms of both safety and efficiency are the molten salt reactors. They don't use water as a coolant, and as a result operate at normal preasures. The fuel and coolant is a liquid lithium, fluoride, and beryllium salt instead of water, and the initial fuel is thorium instead of uranium. Since it is a liquid instead of a solid, you can do all sorts of neat things with it, most notably, in case of an emergency, you can just dump all the fuel into a storage tank that is passively cooled then pump it back to the reactor once the issue is resolved. It is a safety feature that doesn't require much engineering, you are just using the ever constant force of gravity. This is what is known as passive safety, it isn't something you have to do, it is something that happens automatically. So in many cases, what they designed is a freeze plug that is being cooled. If that fails for any reason, and you desire a shutdown, the freeze plug melts and the entire contents of the reactor are drained into the tanks and fission stops (fission needs a certain geometry to happen).

So while the reactor will still be as dangerous as any other industrial machine would be...like a blast furnace, it wouldn't pose any threat to the surrounding area. This is boosted by the fact that even if you lost containment AND you had a ruptured emergency storage tank, these liquid salts solidify at temps below 400c, so while they are liquid in the reactor, they quickly solidify outside of it. And another great benefit is they are remarkably stable. Air and water don't really leach anything from them, fluoride and lithium are just so happy binding with things, they don't let go!

The fuel burn up is also really great. You burn up 90% of what you put in, and if you try hard, you can burn up to 99%. So, comparing them to "clean coal" doesn't really give new reactor tech its fair shake. The tech we use was actually sort of denounced by the person who made them, Alvin Weinberg, and he advocated the molten salt reactor instead. I could babble on about this for ages, but I think Kirk Sorensen explains that better than I could...hell most likely the bulk of what I said is said better by him



http://www.youtube.com/watch?v=N2vzotsvvkw

But the real question is why. Why use nuclear and not solar, for instance?

http://en.wikipedia.org/wiki/Energy_density

This is the answer. The power of the atom is a MILLION times more dense that fossil fuels...a million! It is a number that is beyond what we can normal grasp as people. Right now, current reactors harness less that 1% of that power because of their reactor design and fuel choice.

And unfortunately, renewables just cost to darn much for how much energy they contribute. In that, they also use WAY more resources to make per unit energy produced. So wind, for example, uses 10x more steal per unit energy contributed than other technologies. It is because renewables is more like energy farming.

http://videosift.com/video/TEDxWarwick-Physics-Constrain-Sustainable-Energy-Options


This is a really great video on that maths behind what makes renewables less than attractive for many countries. But to rap it up, finally, the real benefit is that cheap, clean power is what helps makes nations great. There is an inexorable link with access to energy and financial well being. Poor nations burn coal to try and bridge that gap, but that has a huge health toll. Renewables are way to costly for them per unit energy, they really need other answers. New nuclear could be just that, because it can be made nearly completely safe, very cheap to operate, and easier to manufacture (this means very cheap compared to today's reactors as they are basically huge pressure vessels). If you watch a couple of videos from Kirk and have more questions or problems, let me know, as you can see, I love talking about this stuff Sorry if I gabbed your ear off, but this is the stuff I am going back to school for because I do believe it will change the world. It is the closest thing to free energy we are going to get in the next 20 years.

In reply to this comment by ReverendTed:
Just stumbled onto your profile page and noticed an exchange you had with dag a few months back.
What constitutes "safe nuclear"? Is that a specific type or category of nuclear power?
Without context (which I'm sure I could obtain elsewise with a simple Google search, but I'd rather just ask), it sounds like "clean coal".



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