Track train dynamics analysis and test program: Methodology development for the derailment safety analysis of six-axle locomotives

The operational safety of six axle locomotives is analyzed. A locomotive model with corresponding data on suspension characteristics, a method of track defect characterization, and a method of characterizing operational safety are used. A user oriented software package was developed as part of the methodology and was used to study the effect (on operational safety) of various locomotive parameters and operational conditions such as speed, tractive effort, and track curvature. The operational safety of three different locomotive designs was investigated

Letter from J. E. Mathewson to John Muir, 1894 Aug 29.

Sheffield, [England],August, 29, 1894. Dear Sir: In looking over a volume of last year\u27s Century Magazine I came upon an article headed John Muir, and underneath the name was his portrait. I remarked to myself, Why that looks very much like my old schoolmate at theWisconsin State University, John Muir. And hastily running over the articleI found to my astonishment that my conjecture was true. I do not know whether you will rememver me or not, but I have a most distinct recollection of you and those wooden clocks and other ingenious contrivances designed to shoot or pitch heavy sleepers out of bed at any hour or minute in the morning, whether they would or no. I thought at first that we used to room together, but am not clear upon this point. I remember well, however, that we were great friends, both being of an inventive turn of mind and in similar circumstances financially. My poor mother, who died two years since, kept all my letters written from the University, and they are now in my possession. In two of the letters I mention you and the clocks. Have often wondered what had become of you and am now glad to know that you are still in the land of living and have a name which will live. We both attended the University with money earned by ourselves, and therefore was not spent in riotous living by any means. Bread and milk was my staple food during my two years there. We have both been hard workers, although your path has been the most rugged. However, hard work and perseverance nearly always meet with their reward, which it seems has our lots. I read with the deepest interest the short account of your labors in the interest of Science. If you have published a full account of your travels and work, I would be glad to know where it can be bought. Perhaps you would like to know ./hat I have been up to for the last thirty-two or thirty-three years, and why it is that I am writing in this far off country. Well, after leaving the University I returned home and went to work in a steam sawmill where I had formerly been. Remained some eight or ten months, when I started east with the intention of going to a school at Troy, NY. On the way, however, I mad(c) a visit to an uncle in Madison Co., N.Y. While there I caught the war fever and joined (with two of my cousins) Battery A, 1st N.Y. Light Artillery. Went through my three years\u27 service and came out without a scratch either on my character or body. For the last year of my service I was stationed, as a clerk, at the headquarters of the Dept. of Penn. at Phila. Taking a liking to Phila. I returned there after being discharged at the end of the war, Aug. 1865. I soon found work as an engineer at the office of the Phila. Enquirer, and remained there some three or four years. Mr. Harding, the proprietor,wishing to help me on,recommended me to B.C.&R.A Tilghman to carry out some experiments, in which he was also interested in the manufacture of wood pulp for paper making. The experiments turned out unsuccessful, and I was placed in their experimental laboratory, where I had valuable experience in chemistry as well as engineering. In 1870, the idea of using sand driven with great velocity by air steam, etc. to cut hard substances, was suggested by B.C. Tilghman. I assisted him in carrying out the experiments and afterwards putting it to practical uses. In 1873 they sent me to England to introduce the sand blast process to manufacturers. It was quickly taken up and a company formed to work it. I was, of course, the practical man in the business, but was not by any means at the head of affairs. After two or three years, however, matters found their level and I came up to the head as Managing Director, and have remained in that position ever since. Am now fifty-three years of age, and am as hale and hearty as when a young man. I married in Philadelphia and have two children, a daughter Lottie, born in Phila. in 1870 and a son, Alfred, born in London in 1875, who is now my right hand man in the business. My daughter has fine musical abilities - her favorite instrument being the violin. She often plays violin solos at concerts and is considered the best player in Sheffield (a city of 350,000 people). She was in Berlin, Germany, for over a year having the finishing touches given her in violin playing. We livedin London eight years and have been in Sheffield thirteen years. I travel a good deal, on business, all over England and Scotland, and the continent, and hope before long to take a journey to India and Australia. Have been back to the States several times and am making arrangements now to go again on the 22nd of Sept. I am sending you by this post a catalogue of sand blast apparatus made by us. This will give you an idea of01841 [Letter of J. E. Mathewson, Aug. 29, 1894, to John Muir, continued] 2what the sand blast is, if you are not already posted up. Also send my photo. You might reply to care of B.C. & R. A. Tilghman, 1116 South 11thSt., Phila., Pa. as there will be hardly time for your letter to reach me before starting for the States. Have you ever visited your native country? Scotland has great attractions for Americans. If you should come over you must not fail to visit me. Yours sincerely, J. E. MathewsonJohn Muir, Esq.,California, U.S.A. 0184

Letter from J. E. Mathewson to John Muir, 1895 Mar 5.

[letterhead]5th March 1895Dear friend Muir,I duly received your two letters, but business affairs have compelled me to put off replying to same from time to time until now. The last letter I could not lay my hands upon, when on the point of starting from home on Saturday last, so you must excuse me if any questions are not answered. Of course you visited this gay city when you were over here. Have been over some fifteen or twenty times, but a day or so always satisfies one & am therefore glad to be on my way back to England. However I believe the people here live are much more happy as a rule than the English or even the Americans. Business conbined with pleasure is much to be preferred to business & little or no pleasure, but it takes one some time to accustom himself to such seemingly frivolous ways as they [bear?] here. Americans & English as a rule however, seem to readily01954fall into french ways. There are several thousand of these nationalities who live here permanently. In fact there are so many that they support a daily & evening newspaper--the Paris edition of the New York Herald & the Evening News. We have an agent here, an American, John G. Iloan, who has resided here over 30 years--married a French woman & has three boys none of whom can speak English.My daughter has recently passed an examination in Instrumental & Theoretical Music at the Royal Academy of Music. London which entitles her to add the letters L. R. A. M. (Licenciate of the Royal Academy of Music) to her name. She is very proud of it, and it places her in a high position in musical circals. Only five ladies have succeeded in passing the Examination in twenty three years.A friend of mind in London a member of the Society of Arts, has been asked & has agreed, to read a paper on the SandBlast processes, before that Society on April 3rd. I am helping him prepare it & think it will be interesting. Will send you a copy of the Journal containing the paper when published.I have sent for a copy of your book, but it has not yet arrived. Am sure that it will be interesting & instructive. I hope some day to write a book on SandBlast, Anything outside of this would not be in my line, and my whole life has been bound up in it since 1869.I hope yourself & family are well. You must send me a photograph of them all including yourself & I will do the same as regards my family. My son, is an somewhat of an expert in photography & will do the needful as soon as the [weather?] is fit.Sincerely yours.J. E. [Mathewson?

Multi-frequency Study of the LMC Supernova Remnant (SNR) B0513-692 and New SNR Candidate J051327-6911

We present a new multi-wavelength study of supernova remnant (SNR) B0513-692 in the Large Magellanic Cloud (LMC). The remnant also has a strong, superposed, essentially unresolved, but unrelated radio source at its north-western edge, J051324-691049. This is identified as a likely compact HII region based on related optical imaging and spectroscopy. We use the Australia Telescope Compact Array (ATCA) at 4790 and 8640 MHz to determine the large scale morphology, spectral index and polarization characteristics of B0513-692 for the first time. We detect a strongly polarized region (49%) in the remnant's southern edge. Interestingly we also detect a small (~40 arcsec) moderately bright, but distinct optical, circular shell in our Halpha imagery which is adjacent to the compact HII region and just within the borders of the NE edge of B0513-692. We suggest this is a separate new SNR candidate based on its apparently distinct character in terms of optical morphology in 3 imaged emission lines and indicative SNR optical spectroscopy (including enhanced optical [SII] emission relative to Halpha).Comment: 12 page

Graphs and principal ideals of finite commutative rings

In \cite{ABM}, Afkhami and Khashyarmanesh introduced the cozero-divisor graph of a ring, $\Gamma\u27(R)$, which examines relationships between principal ideals. We continue investigating the algebraic implications of the graph by developing the reduced cozero-divisor graph, which is a simpler analog

Magnetic fields of our Galaxy on large and small scales

Magnetic fields have been observed on all scales in our Galaxy, from AU to kpc. With pulsar dispersion measures and rotation measures, we can directly measure the magnetic fields in a very large region of the Galactic disk. The results show that the large-scale magnetic fields are aligned with the spiral arms but reverse their directions many times from the inner-most arm (Norma) to the outer arm (Perseus). The Zeeman splitting measurements of masers in HII regions or star-formation regions not only show the structured fields inside clouds, but also have a clear pattern in the global Galactic distribution of all measured clouds which indicates the possible connection of the large-scale and small-scale magnetic fields.Comment: 9 pages. Invited Talk at IAU Symp.242, 'Astrophysical Masers and their Environments', Proceedings edited by J. M. Chapman & W. A. Baa

The Physical Parameters of the Micro-quasar S26 in the Sculptor Group Galaxy NGC 7793

NGC 7793 - S26 is an extended source (350 pc $\times$ 185 pc) previously studied in the radio, optical and x-ray domains. It has been identified as a micro-quasar which has inflated a super bubble. We used Integral Field Spectra from the Wide Field Spectrograph on the ANU 2.3 m telescope to analyse spectra between 3600--7000 \AA. This allowed us to derive fluxes and line ratios for selected nebular lines. Applying radiative shock model diagnostics, we estimate shock velocities, densities, radiative ages and pressures across the object. We show that S26 is just entering its radiative phase, and that the northern and western regions are dominated by partially-radiative shocks due to a lower density ISM in these directions. We determine a velocity of expansion along the jet of 330 km s$^{-1}$, and a velocity of expansion of the bubble in the minor axis direction of 132 km s$^{-1}$. We determine the age of the structure to be $4.1\times10^5$ yr, and the jet energy flux to be $(4-10)\times10^{40}$ erg s$^{-1}$ The jet appears to be collimated within $\sim0.25$ deg, and to undergo very little precession. If the relativistic $\beta \sim 1/3$, then some 4 M$_{\odot}$ of relativistic matter has already been processed through the jet. We conclude that the central object in S26 is probably a Black Hole with a mass typical of the ultra-luminous X-ray source population which is currently consuming a fairly massive companion through Roche Lobe accretion.Comment: Accepted for publication in MNRAS; 12 pages, 7 figures and 3 table

Treatment of travellers' diarrhoea with fleroxacin: a case study

A double-blind, randomized, placebo-controlled trial was conducted to evaluate the efficacy and safety of fleroxacin for one or two days as treatment for patients with travellers' diarrhoea. A total of 195 patients who were suffering with acute diarrhoea of less than six days' duration were enrolled. One hundred and fifty-one patients, of whom 49 received placebo, 54 received fleroxacin 400 mg for one day and 48 received fleroxacin 400 mg for two days, were included in the analysis of efficacy. The results showed that fleroxacin was significantly superior to placebo, but that there was no significant difference in terms of efficacy between the one- and two-day regimens. Adverse events, particularly minor neuropsychiatric disturbances such as headache and insomnia, were significantly more common amongst patients receiving active treatment. In conclusion, a single dose of fleroxacin 400 mg could be recommended as self-treatment for visitors to high-risk countries who develop travellers' diarrhoe

A model of cost analysis in undergraduate dental health education /

The conclusions can be summarized as: (1) in general models of cost analysis can be developed within a college of dentistry to assess current and future expenditures. (2) there are relationships between direct and indirect costs in formal cost determinations. (3) reliable factors do exist, which can assist in the validity of the final cost outcomes. (4) cost analysis models developed within a college of dentistry may have limited applications in other colleges of dentistry.A model was constructed using longitudinal data from the University of Oklahoma College of Dentistry. Direct and indirect costs, plus income for the college and individual departments, were used to determine costs per student and cost per hour. Using this qualitative information, a computer model was completed which determined various costs. Since several methods were used to assign various indirect costs and incomes, a linear regression method was used to evaluate their influences on costs per student and costs per hour. To test the model's application to other colleges of dentistry, samples of cost data were collected from several institutions