#61
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Rear Derailleur
On Fri, 14 May 2021 22:52:41 -0700, Jeff Liebermann
wrote: On Fri, 14 May 2021 10:58:24 -0700 (PDT), Tom Kunich wrote: I'll just sit here and allow you to make a fool of yourself telling us all that "metals are normally crystalline" as of any person wouldn't know differently. Frank is correct. Common iron plus carbon steels used in bicycles are all crystalline. http://www.phase-trans.msm.cam.ac.uk...ucture/SM.html In Fig 1, "Crystal structures of austenite, ferrite and cementite..." note that all the structures shown are crystalline. However, there are exceptions. Some amorphous compositions of steel, which are best distinguished by their lack to strength, and which are not commonly used in bicycle construction. https://en.wikipedia.org/wiki/Amorphous_metal "Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms. Amorphous metals are non-crystalline, and have a glass-like structure." Rapidly cooled and therefore porous steel slag is an example of amorphous steel. The slag is cooled far too rapidly for the steel to form a crystalline structure. Even your "point and shoot" camera shot of that chain link failure shows only normal fracture from overload from the rivet connection failing. There's no such thing as a crystalline fracture of steel. There is only brittle or ductile fractures. For a rod (rivet), brittle looks rough, like the end has crumbled, with no rivet stretching or necking. Ductile look like the rivet rod has stretched (necked) with fairly smooth ends. https://en.wikipedia.org/wiki/Fracture Fractures (brittle) follow grain boundaries, usually between carbon particles. High carbon steel has 0.3 to 1.0% carbon, which makes the steel strong, but also brittle because of the relatively high carbon content. Cast iron, which has more than 2% steel, has even more carbon grain boundaries and therefore breaks easily when deformed. Impress us some more. Tell us how the keels of the greatest ships ever built were carried by three men on their shoulders. Or maybe you want to tell us the Pyramids were built using large diesel trucks. Methinks I understand what you're doing. You want attention. I find it rather odd that all of your "explanations" include at least one major error. Even the dumbest expert usually gets at least some things right, even if by accident. The easiest way for you to get attention is to post erroneous garbage, and then have those with an understanding of the topic make corrections. When you are cornered, but want more attention, you either start an argument, or change the subject to something controversial. That's why you post something wrong or worthless to literally every thread in this newsgroup. Even if you didn't have anything useful to add, you always manage to add some kind of comment. Do you really crave attention that much that you find it necessary to pollute R.B.T. with your garbage? What will you do when someone agrees with you? Perhaps a simple explanation: Narcissistic personality disorder — A mental condition in which people have an inflated sense of their own importance, a deep need for excessive attention and admiration, troubled relationships, and a lack of empathy for others. But behind this mask of extreme confidence lies a fragile self-esteem that's vulnerable to the slightest criticism and frequently respond to what they perceive as criticism with insults and threats of physical assault. I might as well become part of the problem. Please tell us that the Egyptian pyramids were built by aliens using acoustic levitation: Ancient Aliens: Manipulated Sound Produces Strange Levitation Effect https://www.youtube.com/watch?v=b-11HXUNuCE (5:15) The ancient Egyptians invented the bicycle: The Origin of the Bicycle https://www.xtremecanada.com/content/origin-bicycle "Tomb paintings from ancient Egypt suggest a distant ancestor of the bicycle." https://www.google.com/search?q=ancient+bicycle+carving&tbm=isch -- Cheers, John B. |
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#62
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Rear Derailleur
On Sat, 15 May 2021 13:16:14 +0700, John B.
wrote: Perhaps a simple explanation: Narcissistic personality disorder — A mental condition in which people have an inflated sense of their own importance, a deep need for excessive attention and admiration, troubled relationships, and a lack of empathy for others. But behind this mask of extreme confidence lies a fragile self-esteem that's vulnerable to the slightest criticism and frequently respond to what they perceive as criticism with insults and threats of physical assault. Seems to be a popular disorder: https://www.google.com/search?q=Narcissistic+personality+disorder&tbm=isc h The problem is that almost everyone shows signs of NPD. (Fashionable diseases must have acronyms or nobody remembers the name). Let's take your description and see if it applies to my favorite example, me. Yes, I have an inflated sense of importance. In the past, this was called pride, but that's gone out of fashion. I'm rather proud of a few accomplishments, but few want to hear it. Yes, I have a deep need for attention and admiration. Why else would I should off my knowledge of how things work? In the past, I just wanted to help solve problems, but that became boring because new problems accumulate faster than they can be solved. So, I limit myself to explaining how things work, and let people solve their own problems. I still get my dose of attention and admiration, without actually solving any problems. Yes, I have troubled relationships. Actually, all my past relationships have been troubled. Should I ever find the ideal partner, one of my first actions will be to disappear from R.B.T. Yes, I have a lack of empathy of others. In the past, I used to pride myself in not knowing anyone whom I can genuinely hate. That worked fairly well, until Tom arrived. After trying to be helpful by answering his questions, correcting his numerous mistakes, making useful suggestions, and revising his resume, but receiving no attention or admiration, I think I finally found someone with whom I have no interest in sharing their problems. Yes, I wear the mask of extreme confidence. It's necessary because experts are expected to act in a confident manner. Would you accept advice from someone who doubts their own abilities? I wouldn't. The perception of extreme confidence is very important. Yes, under my mask of self confidence lies a fragile self-esteem. It sometimes becomes visible when I make a mistake. In the past, I used to sulk and worry that my reputation would be ruined and nobody will trust what I have to offer. Today, I have Tom as a perfect example of someone who has demonstrated that it is possible to be chronically wrong and survive the experience. No, I am not vulnerable to criticism. I had that problem in the past, but not for many years. I learn from my mistakes and make an effort to correct the problem. I also thank people for finding my errors. I expect to continue making mistakes and continue fixing them. It's called trial and error (or Learn by Destroying). However, when I am criticized unfairly or in an insulting manner, I first try to respond in a tactful and diplomatic manner. If that fails, I sometimes add a few insults. I don't threaten or engage in physical violence, but have hired those who do so (for an eviction). I guess I do have some of the characteristics of narcissistic personality disorder. -- Jeff Liebermann PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
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