Physicists From The United States

"I don't think that any physicist would have been clever enough to have invented string theory on purpose... Luckily, it was invented by accident."

"It is very possible that a proper understanding of string theory will make the space-time continuum melt away.... String theory is a miracle through and through."

"String theory is extremely attractive because gravity is forced upon us. All known consistent string theories include gravity, so while gravity is impossible in quantum field theory as we have known it, it is obligatory in string theory."

":: If, in discussing a semiconductor problem, you cannot draw an Energy Band Diagram, this shows that you don't know what you are talking about,"

": with the corollary"

"Most people who haven't been trained in physics probably think of what physicists do as a question of incredibly complicated calculations, but that's not really the essence of it. The essence of it is that physics is about concepts, wanting to understand the concepts, the principles by which the world works."

":: If you can draw one, but don't, then your audience won't know what you are talking about."

"Whenever I came to him (Fritz Sauter) with a pure physics idea, he would invariably say, with slight sarcasm: "But Mr. Kroemer, you ought to be able to formulate this mathematically! " If I came to him with a math formulation, I would get, in a similar tone: "But Mr. Kroemer, that is just math, what is the physics?" After a few encounters of this kind, you got the idea: You had to be able to go back and forth with ease. Yet, in the last analysis, concepts took priority over formalism, the latter was simply an (indispensable) means to an end."

"The principal applications of any sufficiently new and innovative technology always have been—and will continue to be—applications created by that technology."

"God loves the noise as much as the signal."

"Ultimately, progress in applications is not deterministic, but opportunistic, exploiting for new applications whatever new science and technology happen to be coming along."

"We must understand that the fact of error, demonstrated in subsequent work, does not suggest that ethical lapses are responsible. It is more likely that the source of error is, as the advertisement says, a reflection of the fact that "its dangerous to trifle with Mother Nature"."

"Whenever I teach my semiconductor device physics course, one of the central messages I try to get across early is the importance of energy band diagrams. I often put this in the form of "Kroemer's Lemma of Proven Ignorance":"

"Quantum mechanics... developed through some rather messy, complicated processes stimulated by experiment. While it's a very rich and wonderful theory, it doesn't quite have the conceptual foundation of general relativity. Our problem in physics is that everything is based on these two different theories and when we put them together we get nonsense."

"I distinguish two kinds of "applied" research: problem-solving research — government or commercially initiated, centrally managed and institutionally coupled to a plan for application of the results, useful science — investigator-initiated, competitively evaluated and widely communicated. Then we have basic science — useful also, also investigator-initiated, competitively evaluated and widely communicated."

"Shortly after taking office in 1993, President Bill Clinton and Vice President Al Gore called for a shift in American technology policy toward an expansion of public investments in partnerships with private industry."

"Scientists are used to debating with one another about the finer points of new research. But increasingly, they find themselves battling their televisions and computer screens, which transmit ever-more-heated rhetoric from politicians, pundits, and other public figures who misinterpret, misrepresent, and malign scientific results."

"The progress of science still depends on "a few people of vision"."

"Science has been the absolute bedrock of technological and economic progress in the United States."

"Technology policy - whether we should have one and what form such a policy should take - was a core issue of the 1992 presidential campaign, and in February 1993 the Clinton administration confirmed that fostering new technologies will be a critical part of its agenda for redirecting the American economy."

"While political and cultural factors are important as explanations for differences in national technology policy and industrial practices, emergent trends in science, engineering and management are leading to new paradigms for high-technology innovation in both Japan and the United States."

"I believe that there are very few scientists who deliberately falsify their work, cheat on their colleagues, or steal from their students. On the other hand, I am afraid that a great many scientists deceive themselves from time to time in their treatment of data, gloss over problems involving systematic errors, or understate the contributions of others. These are the 'honest mistakes' of science. The scientific equivalent of the 'little white lie' of social discourse. The scientific community has no way to protect itself from sloppy or deceptive literature except to learn whose work is suspect as unreliable."

"An exploration of the challenges Korea faces in transforming its economy from a government-directed, low-cost producer to an innovative world economic power based on its own scientific and technological development."

"Never let academics falter; you have to be successful to have authority to champion change"

"You must develop one all-important ability — being able to enlist the help of other people. You have to reach a state where others want to help you. This includes giving credit...which will come back to you a hundredfold. Your reputation stems from what people say when you’re not present."

"I am interested in the electronic, optical, magnetic, and transport properties of novel semiconductor systems. Of special interest are the behavior of magnetic polarons in semimagnetic and dilute magnetic semiconductors, and the optical response properties of semiconductor quantum-wells and superlattices. My interests also include quantum dots, mesoscopic systems, and the role of antiferromagnetic fluctuations in correlated 2D electron systems."

"It is the great glory of the quest for human knowledge that, while making some small contribution to that quest, we can also continue to learn and to take pleasure in learning."

"While it is becoming increasingly obvious that the fundamental architecture of a system has a profound Influence on the quality of its human factors, the vast majority of human factors studies concern the surface of hardware (keyboards, screens) or the very surface of the software (command names, menu formats)."

"Teachers of science in schools and colleges must be masters of the tools for ensuring integrity in science and must instill them in their students."

"We need to go back to the discovery, to posing a question, to having a hypothesis and having kids know that they can discover the answers and can peel away a layer."

"In Newton's day the problem was to write something which was correct - he never had the problem of writing nonsense, but by the twentieth century we have a rich conceptual framework with relativity and quantum mechanics and so on. In this framework it's difficult to do things which are even internally coherent, much less correct. Actually, that's fortunate in the sense that it's one of the main tools we have in trying to make progress in physics. Physics has progressed to a domain where experiment is a little difficult... Nevertheless, the fact that we have a rich logical structure which constrains us a lot in terms of what is consistent, is one of the main reasons we are still able to make advances."

"We hardly know the limit of intelligence of individuals who can fruitfully contribute to science in one way or another if they are given the proper training – including graduate training – as assistants, as supervised or semi-independent researchers, as team members. Individuals with any of a very broad spectrum of intellectual attributes can contribute to science."

"It's a fantastically specialized universe, but how in the world did it happen?"

"I feel that very rarely have I done any work in my life. I have a good time. I'm exploring. I'm playing a game, solving puzzles, and having fun, and for some reason people have been willing to pay me for it. Officially, I was supposed to retire years ago, but retire from what? Why stop having a good time?"

"String theory at its finest is, or should be, a new branch of geometry. ...I, myself, believe rather strongly that the proper setting for string theory will prove to be a suitable elaboration of the geometrical ideas upon which Einstein based general relativity."

"Getting up any cliff is like a physics problem -- you just got to hold on, try everything, and stick with it."

"Kuhn's recognition that science might cease—leaving us with what Charles Sanders Peirce had defined as the "truth" about nature—made it even more imperative for Kuhn than for Popper to challenge science's authority, to deny that science can ever arrive at absolute truth. "The one thing I think you shouldn't say is that now we've found out what the world is really like," Kuhn said. "Because that's not what I think the game is about.""

"In Structure, the “third and most important aspect of […] incommensurability” is world change (p. 150) There have been several reactions to this claim: a. Dismissal because of idealism b. Defusing of world change by a metaphorical or psychological reading c. “Neo-Kantian” reading"

"Kuhn had the genius to find the words and sketch the concepts that made important old philosophical problems relevant to the public and newly discussable by philosophers. He had the strength of mind and commitment to lead the discussion. He could speak the truly incommensurable languages of physics, philosophy, and history, all necessary to frame and advance his epistemological quest. He wrote, as one of his admirers, Margaret Masterman, put it, in a "quasi-poetic style," sometimes veiled, sometimes with "rhetorical exaggeration," but always after careful and even painful thought. Or, to switch metaphors, he drew the portrait of science in the manner of the Impressionists. At a distance, where most viewers stand, the portrait appears illuminating, persuasive, and inspiring; close in, where historians and philosophers stare, it looks sketchy, puzzling, and richly challenging."

"World change, reaction a: dismissalIsrael Scheffler in Science and Subjectivity, 1967, p. 19: “I cannot, myself, believe that this bleak picture, representing an extravagant idealism, is true.” The full argument contains four premises and one conclusion (this is for the philosophers): P1: Incommensurability encompasses world change P2: World change (in revolutions) implies idealism. P3: Idealism is bullshit. P4: Bullshit can be dismissed. Conclusion: Incommensurability can be dismissed. Ad P2: Yes, perhaps, but what sort of idealism? Ad P3: The high-school version of idealism is certainly very questionable: “What reality is depends on how you think of it” – period Was this Kuhn’s view?"

"Kuhn cannot take seriously that “there is some one full, objective, true account of nature.” Does this mean that he does not take truth seriously? Not at all. [...] Kuhn did reject a simple “correspondence theory” which says true statements correspond to facts about the world.[...] In the wave of skepticism that swept American scholarship at the end of the twentieth century, many influential intellectuals took Kuhn as an ally in their denials of truth as a virtue. I mean the thinkers of the sort that cannot write down or utter the word true except by literally or figuratively putting quotation marks around it—to indicate how they shudder at the very thought of so harmful a notion. Many reflective scientists, who admire much of what Kuhn says about the sciences, believe he encouraged deniers. It is true that Structure gave enormous impetus to sociological studies of science. Some of that work, with its emphasis on the idea that facts are “socially constructed” and apparent participation in the denial of “truth,” is exactly what conservative scientists protest against. Kuhn made plain that he himself detested that development of his work..."

"Notice that there is no sociology in the book. Scientific communities and their practices are, however, at its core, entering with paradigms, as we saw, at page 10 and continuing to the final page of the book. There had been sociology of scientific knowledge before Kuhn, but after Structure it burgeoned, leading to what is now called science studies. This is a self-generating field (with, of course, its own journals and societies) that includes some work in the history and the philosophy of sciences and technology, but whose emphasis is on sociological approaches of various kinds, some observational, some theoretical. Much, and perhaps most, of the really original thinking about the sciences after Kuhn has had a sociological bent. Kuhn was hostile to these developments. In the opinion of many younger workers, that is regrettable. Let us put it down to dissatisfaction with growing pains of the field, rather than venturing into tedious metaphors about fathers and sons. One of Kuhn’s marvelous legacies is science studies as we know it today."

"World change, reaction b: metaphorical/psychological[...] The metaphorical/psychological reading of world change does not capture Kuhn’s intentions."

"Well, he wasn't a relativist. There's a long and complicated story of the rise of a desire for scientific relativism. Part of it may well be simply sort of rage against reason, the fear of the sciences and a kind of total dislike of the arrogance of a great many scientists who say we're finding out the truth about everything—and here [with Kuhn] there was a way to undermine that arrogance."

"Thomas Kuhn is the Thomas Hobbes of science, assuring us that unless there is an Absolute (conceptual) Sovereign, known as The Paradigm, all is chaos, and the life of cognitive ideas is solitary, poor, nasty, brutish and short."

"Without doubt, Kuhn's work was the single most influential force in creating the intersection of history, philosophy and sociology of science that became identified as 'science studies'. The irony and tragedy is that, in spite of official honours and genuine attempts at reconciliation by both Kuhn and others, he himself was never truly at home in any of these disciplines, nor in their intersection. The majority of historians and philosophers of science never permitted Kuhn to feel genuinely comfortable in their professional associations. The sociologists tried, but Kuhn himself was not comfortable in their company. He died professionally homeless."

"A few years ago I happened to meet Kuhn at a scientific meeting and complained to him about the nonsense that had been attached to his name. He reacted angrily. In a voice loud enough to be heard by everyone in the hall, he shouted, "One thing you have to understand. I am not a Kuhnian." Kuhn never said that science is a political power struggle. If some of his followers claim that he denied the objective validity of science, it is only because he overemphasized the role of ideas and underemphasized the role of experimental facts in science."

"I did learn from Kuhn that he was very dissatisfied with the way in which his earlier book, Structure of Scientific Revolutions, was being transformed into an anti-science post-modern diatribe by many academics. He taught me that there is nothing post-modern whatever about his theory of scientific change. I never forgot the lesson."

"How do scientists think? The short answer: very much like you or me. If that statement doesn’t raise any eyebrows today, it’s because of a college professor named Thomas Kuhn who died in 1996."

"So who cares? We should care. Kuhn's work supports the idea that science progresses from-what-we-know to what-we-know-next. This is in contrast with the Whig interpretation of science, which is the inevitable march from darkness to light, from confusion to clarity, from error to truth. Of course, there is nothing wrong with teaching physics by recounting its past successes, but that is not in fact how the dynamic of knowledge works."