1,149 research outputs found

    Letter from Henry L. Abbot to John Muir, 1910 May 1.

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    Washington D. C. 1 May 1910.My dear Mr Muir,I write to say that my son Col. Abbot has been transferred from here to take direction of the Boston district, and that my address hereafter will be 23 Berkeley Street, Cambridge Mass. in case you should have occasion to write.I saw Brewer and Hague at the National Academy meeting week before last, and shall soon see Sargent. I wish you were this side of the Rockies too.Very truly yours,[illegible]Was glad to have yours of 14th ult. The Ballenger-Pinchot fight goes on actively.0475

    Letter from Henry L. Abbot to John Muir, 1910 Mar 13.

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    2013 Kalorama Road N.W. Washington D.C.13 March 1910.My dear Mr. Muir, I was glad to have yours of9th ult. recalling so many pleasant recollections of our delightful trip. I like to believe that we did good work, and told the truth and nothing but the truth in our report. Since that date there has been much politics mingled with forest conservation, and the struggle now in progress in Congress over the Ballinger-Pinchot matter is not helping the cause. The report on Hetch Hetchy matter, from what I have seen of it in the newspapers, will go far to prevent its desecration .I should delight to have a good long talk with you on the subject, but have no present plan to revisit the Pacific Coast. With sincere regardsYours very truly,[Illegible]0472

    Letter from Henry L. Abbot to John Muir, 1910 Jan 9.

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    2013 Kalorama Road N. W. Washington D.C.9 January 1910.My dear Mr Muir,It was a great pleasure to receive your circular about the Hetch-Hetchy Valley, and thus to know that you are well and still busy in your good work. I often think of our trip together through your mountain regions on the Pacific Coast, and wish that fate might bring us together again. Last summer I dined with Prof Sargent at his home, and met Brewer at New Haven; both were well, as I am myself. Hague I have not seen for several months, and Pinchot not for years. He is having a lively fight recently, and I hardly think he is getting the best of it. I wish we were near enough to meet often, but you may be sure that all the good wishes of the season are coming to you fromYour old friend,[illegible]I am sending by same mall a pamphlet which touches a little on forests.0467

    Asymptotic freedom in a scalar field theory on the lattice

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    An alternative model to the trivial ϕ4\phi^4-theory of the standard model of weak interactions is suggested, which embodies the Higgs-mechanism, but is free of the conceptual problems of standard ϕ4\phi ^4-theory. We propose a N-component, O(N)-symmetric scalar field theory, which is originally defined on the lattice. The model can be motivated from SU(2) gauge theory. Thereby the scalar field arises as a gauge invariant degree of freedom. The scalar lattice model is analytically solved in the large N limit. The continuum limit is approached via an asymptotically free scaling. The renormalized theory evades triviality, and furthermore gives rise to a dynamically formed mass of the scalar particle.Comment: 10 pages, LaTeX, one figure and a motivation for the particular type of action adde

    Exact Baryon, Strangeness and Charge Conservation in Hadronic Gas Models

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    Relativistic heavy ion collisions are studied assuming that particles can be described by a hadron gas in thermal and chemical equilibrium. The exact conservation of baryon number, strangeness and charge are explicitly taken into account. For heavy ions the effect arising from the neutron surplus becomes important and leads to a substantial increase in e.g. the π/π+\pi^-/\pi^+ ratio. A method is developed which is very well suited for the study of small systems.Comment: 5 pages, 5 Postscript figure

    Centimetre continuum emission from young stellar objects in Cederblad 110

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    The low-mass star formation region associated with the reflection nebula Cederblad 110 in the Chamaeleon I cloud was mapped with the Australian Telescope Compact Array (ATCA) at 6 and 3.5cm. Altogether 11 sources were detected, three of which are previously known low mass young stellar objects associated with the nebula: the illuminating star IRS2 (Class III, Einstein X-ray source CHX7), the brightest far-infrared source IRS4 (Class I), and the weak X-ray source CHX10a (Class III). The other young stellar objects in the region, including the Class 0 protostar candidate Cha-MMS1, were not detected. The radio spectral index of IRS4 (alpha = 1.7 +/- 0.3) is consistent with optically thick free-free emission arising from a dense ionized region, probably a jet-induced shock occurring in the circumstellar material. As the only Class I protostar with a 'thermal jet' IRS4 is the strongest candidate for the central source of the molecular outflow found previously in the region. The emission from IRS2 has a flat spectrum (alpha = 0.05 +/- 0.05) but shows no sign of polarization, and therefore its origin is likely to be optically thin free-free emission either from ionized wind or a collimated jet. The strongest source detected in this survey is a new compact object with a steep negative spectral index (-1.1) and a weak linear polarization (about 2 %), which probably represents a background radio galaxy.Comment: 7 pages, 2 Postscript figures. Accepted for publication in Astronomy & Astrophysic

    Confirmatory Experiments on the Value of the Solar Constant of Radiation

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