Monday, 2 October 2017

Las vegas shooting

(Article under construction)

Hours after the mass shooting in las vegas, when many facts are still unknown, we can already notice a narrative beginning to take shape in the leftist media. There are energetic and widespread calls for gun control. As always, the liberals are using tragedy to push their anti-gun agenda. They never grasp the fact that this is a settled question in the united states: Regardless of how many mass shootings take place, they do not invalidate the 2nd amendment. We already learned the folly of trading freedom for security after the september 11 attacks and the patriot act. The liberals are attempting ram their policys through while the public is still in a state of shock and unable to respond logically. They push the idea that more gun laws would have prevented the atrocity, even though the shooter must have violated dozens of laws to carry out his vile deed. We need to keep an eye out for politicians who act too quickly in the wake of this mass shooting. There are treacherous elements within america who want to see the country turned into an anologue of europe: A dumbed down populace infiltrated by muslims and communists, that has been disarmed mentally and physically.

The timing of this event is certainly unfortunate, as it comes at a time when the fake 'refugee crisis' was showing signs of beginning to unravel. The narrative was crumbling under sustained attack from independent media, who were able to prove that non-government organisations (NGOs) like Save The Children and Support Refugees were engaged in illegal human trafficking. For obvious reasons, mass immigration of 3rd worlders is a bigger threat to civilisation than a few mass shootings. We have to remember to keep our eye on the ball and not get distracted by sensational tragedys. The most important thing to do at this point is to compile video archives of the event and compare them all for mutual consistency. This will allow us to verify whether the shooting was indeed done by 'just a lone nut' (TM). It will also allow us to determine whether or not there are anomolous events which are being ignored by the mainstream media.

Las Vegas shooting: Hillary Clinton leads calls for tougher gun control 

Sen. Murphy Tells Congress to ‘Get Off Its Ass’ on Gun Control

Newsom, Harris call for increased gun control in response to Las Vegas shooting

Las Vegas Shooting: John Mayer, Lady Gaga, Other Celebs Call for Gun Control

Sunday, 30 April 2017

WW2 german nuclear program

When germany invaded poland on september 1, 1939, the army ordnance office (HWA) devised a program to explore the possible development of nuclear weapons. The first meeting was organised by Kurt Diebner, a nuclear physicist who advised the HWA, and was held on September 16, 1939. The second meeting drew in major players like Klaus Clusius, Otto Hahn, Werner Heisenberg, and was held on September 26, 1939. Before the year was out, Diebner had assembled a fairly large team of scientists, formed a consensus on what goals they should pursue, and organised everyone into teams to carry out theoretical and applied research. Within germany, the nuclear program was known as the uranverein. They made alot of progress early on in the war, and were actually ahead of the british and americans until early 1942 or so. From that point on, though, the americans began to rapidly outpace them with the manhattan project and the huge resources marshaled toward it. While germany eventually lost the war and any hope of winning the nuclear race, the achievements made by their scientists were considerable. The scientists encountered numerous difficultys, most notable of which was when the HWA relinquished control of the project in July 1942. Almost as bad was when the allys began their strategic bombing campaign, which resulted in some of the laboratorys being destroyed. In spite of all this, the germans dilligently continued their work and maintained a strong research program. This was especially true for the team run by Paul Harteck, as we will eventually see. At the time, there were known to be just two approaches to weaponizing the strong nuclear force.

The first method is to enrich natural uranium by separating U-235 from U-238. The U-235 isotope is fissile, but makes up only 0.72% of natural uranium by mass. If uranium is to be used in a bomb, its U-235 concentration must be raised to 90%. The second method is to bombard natural uranium with neutrons and transmute it into plutonium. The U-238 isotope is fertile, and if it captures a neutron, it will turn into U-239, which then decays into Pu-239. If plutonium is to be used in a bomb, its Pu-239 concentration must be raised to 93%. Uranium can be enriched to weapons grade by a variety of techniques, but uranium can only be transmuted into plutonium by a reactor. In hindsight, the german nuclear program made significant steps towards uranium enrichment, but were lagging in their efforts to make a reactor. The details of this subject are complicated and sometimes convoluted, since many historians have offered many appraisals that are mutually exclusive. Authors like Paul Lawrence Rose, for instance, have such a prejudice against the nazis that it interferes with their ability to even tell a coherent narrative. Other writers go in completely the opposite direction. As always, though, only some of these appraisals can be corroborated. This article will focus on a number of myths about the german nuclear program and how it measured up to the manhattan project.

The  B-VIII pile uranium pile in haigerloch

The germans never measured the fission cross section of uranium-235: Hence, they were never able to properly estimate the critical mass for an atomic bomb.

This claim is not supported by the facts. After the conquest of denmark and france in mid 1940 (among other unfortunate victims of the blitzkrieg), germany had access to cyclotrons at vienna, copenhagen, and paris. These are a type of particle accelerator that can generate 'fast neutrons', and thus allow scientists to measure the fission cross section of an element. Each of the laboratorys in vienna, copenhagen, and paris were visited by german teams during the war. This is unsurprising, because determining the critical mass of U-235 was a key parameter for which much of their work would hinge on. The scientists made fission cross section estimates at three points in the war, each more accurate than the last. [1] In August of 1941, an individual named Fritz Houtermanns (who was employed in the laboratory of Manfred von Ardenne) wrote a paper which discussed runaway chain reactions and the possibility of transmuting uranium into plutonium. This paper was circulated among members of the uranverein, eliciting a flurry of discussion. By February 1942, the HWA team run by Kurt Diebner had published a document outlining the critical mass for a U-235 bomb: The estimate was 10 to 100 kilograms, comparable to the american estimate of 2 to 100 kilograms! However, the HWA report also stated that the difficultys of separating U-235 from U-238 were such that a crash program could not be recommended, because there was no guarantee that such investments would yield a bomb before the wars end. This pessimistic interpretation was reinforced by a meeting that Werner Heisenberg had with Albert Speer in June of 1942, when he flat out stated that a bomb could not be delivered in a reasonable time, and that the nuclear program should only receive modest funding.

The uranverein never developed an effective means of enriching uranium to weapons grade.

This is simply not true. Early in 1943, the research team under Paul Harteck had created a centrifuge of novel design, subdivided into multiple rotors and multiple chambers. This 'ultracentrifuge' was tested by separating isotopes of xenon gas, and then by separating uranium hexafluoride. This machine was able to enrich several grams of uranium to 7%, good enough to warrant funding from the reich research council (RFR). More centrifuges were made, and the design was constantly tinkered with. By May of 1944, a company in freiburg had built and successfully tested the MK III ultracentrifuge, which persuaded Harteck to move his laboratory there. The team set up a facility in the nearby town of kandern, where a few centrifuges were assembled into a cascade. After a few months, however, allied bombings forced them to stop work and relocate to a town called celle. Early in 1945, the facility only had 20 or so of these machines, but was still enriching 50 grams of uranium to 15% each day! The MK III ultracentrifuge was a technological marvel with a performance far exceeding the american centrifuges. [2] There were actually plans to put it into mass production, but the war ended before this could take place. Other research teams in germany had experienced similar ups and downs. By June of 1943, Erich Bagge had created an 'isotope-sluice' machine that ran uranium hexafluoride through two shutters revolving at high speed, allowing the lighter U-235 to be separated. This was a totally novel approach which never occurred to the americans, using a combination of electromagnetism, centrifugal force, and thermal diffusion.

While his first two prototypes were destroyed by air raids, Bagge was able to relocate to butzbach and set up another machine. By July of 1944, the 'isotope-sluice' had undergone an endurance test lasting 120 hours, yielding several grams of much enriched uranium. The models indicated its efficiency could be greatly increased. At around this same time, Manfred von Ardenne was testing a magnetic isotope separator, not unlike the calutrons used at the Y-12 plant at oak ridge. Both machines used magnetic fields to deflect charged particles and separate them based on differences in mass, but the german design used an ion source to sublimate the uranium. This greatly increased its enrichment capacity. Ardennes laboratory was located underground in his manor, which protected it from air raids. And since he was financially supported by the post office, work on it was able to continue unimpeded. Fortunately for the allies, however, only one of these machines were made during the war. Putting the technical details aside for now, it should be clear that the uranverein had made major strides in their knowledge and ability to separate U-235 from U-238. The problem was that these efforts were all confined to laboratorys, and were never expanded to the industrial scale that was needed for an atom bomb. There were not enough scientists and engineers working on uranium enrichment, and there was not enough funding from the RRC to produce these machines in anywhere near the numbers required. The only team that came close was the one run by Harteck.

The german ultracentrifuge, which was 
superior to the american design

The germans never generated a self-sustaining nuclear chain reaction, much less a working reactor.

This point requires some background. One of the things needed for a nuclear reactor is a substance which can act as a neutron moderator, and allow a chain reaction to continue unabated. During WW2 there were only two known substances that could fulfill this role: Graphite and heavy water. Allied and axis scientists investigated each of them. In January 1941, Walther Bothe had performed experiments on the purest graphite available, to see whether it could slow down the neutrons without absorbing them. Eventually, he determined that the capture cross-section of graphite was too large to make it an effective moderator. The americans actually came to the same conclusion as him, but would quickly learn that this was due to trace amounts of boron, which could be removed by making the graphite out of petroleum instead of coke. The germans never did this extra step, and were now totally dependent on a supply of heavy water, which was synthesized at only one location in all of europe: The norsk hydro plant. By May of 1942, enough heavy water had been assembled to make a uranium pile. By May of 1942, enough heavy water had been assembled to make a uranium pile at leipzig. Heisenbergs experiment yielded a neutron increase of 12 percent, meaning that the pile emitted more neutrons than what had been injected into it. This was a step in the right direction. Unfortunately, the containment vessel exploded soon after the experiment, leaving them with a shortage of heavy water. In April of 1943, Diebner performed an experiment of his own. Rather than place the uranium and heavy water into an aluminum sphere, he had the uranium cast into cubes, and the heavy water frozen into ice. 

The test resulted in a neutron increase of 36 percent, 'an extremely favorable and unexpected result.' Diebner had proven that uranium cubes were superior to the plates that Heisenberg used, and that the aluminum containment vessel he'd used was counter-productive. While the basic research problems had been overcome, no new reactors could be built without an adequate supply of heavy water. Progress on this area stalled as a result, and results came at an agonisingly slow pace. Conditions were only worsened when the allys conducted raids against the norsk hydro plant, interrupting the supply of heavy water. The months and years dragged on, and optimism soon gave way to pessimism. By early 1945, the germans had two crude 'reactors' that were on the verge of sustaining a chain reaction. One of these uranium piles was at stadtilm under Kurt Diebner, while the other uranium pile was at haigerloch under Heisenberg. Both of these uranium piles were assembled under very difficult circumstances. The scientists were on the run from allied armys, and had to carry all the necessary supplys by truck. A containment vessel had been built prior to their arrival: It was a simple cavity excavated into the ground, and lined with graphite to act as a reflector (not a moderator). After the experiment was completed, Heisenberg determined that for 100 neutrons injected into the pile, 670 neutrons had been emitted at the surface. This was a very significant achievement, but it wasn't enough for a self sustaining reaction. Kurt Diebners uranium pile experienced a similar increase in neutron generation, before he had been forced to stop the experiment for safety reasons.

[1] Fritz Houtermans used radium to make the 'slow neutron' measurements in 1941. Walther Bothe used the paris cyclotron to do the fast neutron measurements in 1942. Jentschke and Lintner used the vienna cyclotron to do more fast neutron measurements in 1943.

[2] Although to be fair, funding for the centrifuge research was cancelled in 1943. Its possible that the americans could have come up with a design that was as good as that of the germans, but they never got the opportunity to do so.

Tuesday, 28 February 2017

Animorphs FAQ

This is another entry into what is quickly becoming a large catalogue of thoughts on the animorphs series. The first post was an overview of what the storys were about, how they set a high bar in childrens sci fi, and have never really been surpassed in terms of thematic content. I also offered some thoughts I had about certain dilemmas that had plagued readers of the series. The second post was an attempt to determine whether the animorphs hometown had a real world analogue. I was able to firmly prove that the descriptions of their city matched those of ventura, californa. This post will take more of a FAQ format, and answer some questions that were never addressed in the books. Mostly about those big, sciency questions that people tend to shy away from. Alot of this is about the yeerk species, and how they evolved in a biological and cultural manner. When K.A. applegate sat down to wrote the animorphs series, her aim was to provide the young heros with a unique race of aliens to fight against. At first glance, they are your standard group of evil alien parasites trying to enslave humanity, thus yielding the moral high ground to the humans who were fighting in self defense. But as the series progresses, applegate presents the yeerks in an increasingly sympathetic light. Their natural bodies are so inadequate that they cannot see, hear, or do any of the things that humans take for granted. They are a race of cripples that have no choice but to enslave others.

Alien races from the series

How is it possible that a self aware race like the yeerks evolved to become parasites, and control the functions of another creatures brain? 

Were they parasites before they became sentient, or were they sentient before they became parasites? This is something that has always perplexed me. Yeerk nature is at the core of the animorphs series, the reason they came to earth and put humanity in their sights. Their parasitic nature is what compelled them to infest other self aware beings, denying them freedom so that they could be free themselves. I have a speculative theory on how this might have happened. While details from the book are scarce, what we do know is that they are hermaphrodites that reproduce through epigamy. Putting it simply, they only reach sexual maturity in very specific conditions, because the metamorphosis is irreversible and reproduction is fatal. During the spawning process, yeerks merge together and somehow 'fuse', and from them emerge juvenile 'grubs.' There appear to be both male and female yeerks, even though they carry both pairs of sex organs. Most importantly, they are an aquatic species that can move through an animals ear canal and into their actual skull, sinking into its every crevice. By attaching their neurons to those of the hosts brain, the yeerks are able to take complete control over their bodys and use them as a puppet. Can natural selection provide a explanation for such a bizarre race? My answer is an emphatic yes. 

Before we go any further, though, I would like to posit two separate claims. 1) That the ancestors of yeerks had a 'neural patch' as part of their anatomy. 2) That these proto-yeerks could only reproduce by migrating to some ancestral spawning ground. If both these claims are true, then we can venture the following theory. Like salmon, the yeerks must travel from an ocean up into a river, and hence, swim against strong tides and up into waterfalls. I imagine this would require incredible exertion on their part, and that some of the yeerks wouldn't complete the journey back. If so, then the bottleneck for reproduction is limited to those who can succesfully migrate back to the spawning grounds. Maybe the yeerk ancestors faced a crisis at some point, something which caused the journey to become more dangerous and more difficult? If so, it would hardly be surprising if some of the yeerks managed to cheat and find another way to get upriver... Maybe they swam into the ear canal of some creatures (like the gedd) who were taking a drink, using their 'neural patch' to direct them towards the spawning ground? * This approach would have given the yeerks in question a major advantage over their peers who were trying to swim upriver the hard way. Perhaps it created a selection pressure great enough that the yeerk anatomy changed, so successive generations had a larger 'neural patch' that could take more and more control over the gedd brain? We have seen similar instances of parasitism here on earth.

Did the yeerk empire have conflicting needs when it came to the species they tried to conquer?

Absolutely. After they set up their colony on the hork-bajir world, and their population grew to number in the billions, the yeerks faced a catch-22 situation with regards to their hosts. They have five different classifications for potential host species. Class 1 are those which are physically unfit for infestation. Class 2 are those which are fit for infestation, but suffer from severe drawbacks. Class 3 species are those that would make excellent hosts, but are few in number and can't be bred quickly. Class 4 are those that would make excellent hosts, but are too formidable to conquer. Class 5 are those fit for infestation, are large in numbers and able to breed quickly, and cannot fight back. The existential crisis plaguing the yeerks is that despite decades of searching, they had seen no examples of the desperately needed class 5 species. You see, it all comes down to agriculture. If a species doesn't have agriculture, then its population will number roughly the same as neolithic humans, I.E about 5 or 10 million. This is why the hork-bajir were rated as class 3. Their small numbers and lack of technology made them easy to conquer, but it also meant that they couldn't supply the full needs of the empire. But if a species did have agriculture, then its population would quickly explode in numbers, developing better technology and a state apparatus to manage them. (This usually implys a military) This is why humans were rated as class 5. They were harder to conquer than class 3 species, but also yielded a much greater payoff for the empire.

The huge problem here is that within just a few centurys, a species can go from type 5 to type 4 status, just as the andalites did. Technological evolution would rapidly allow a type 5 species to leave its planet, build an armada of spaceships, and colonize other worlds, which means they are no longer type 5! The central paradox for the yeerks is that the type 5 species they coveted so badly were unstable and transitionary: They were nothing more than a brief period of adolescence that was eventually grown out of. Both the yeerks and andalites believed that humanity was nearing the end of its type 5 status, and would quickly mature into a type 4 species like them. This must have been incredibly frustrating to the yeerks. Even after they had picked a needle from a haystack and discovered earth, they would not get an effortless victory over mankind. Conquering them would require scarce resources that were needed elsewhere. And the situation wouldn't have been any better if they had somehow went back in time and discovered humanity back in the 1800s (when its population only numbered 1 billion). The yeerks would have an easier time conquering earth, yes, but the payoff in hosts would be smaller. It takes about 18-19 year for humans to grow to maturity, and they literally didn't have the time to wait that long. The empire had an immediate need for huge numbers of hosts to stem back the advancing tide of the andalite fleet. It was an unenviable situation for them.

*In the movie avatar, the alien na'vi use a neural cord that can attach to those of other species and control their behaviour. Its an interesting analogue, if nothing else.