• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 203
  • 75
  • 45
  • 37
  • 15
  • 9
  • 6
  • 5
  • 3
  • 2
  • 2
  • 2
  • 1
  • 1
  • 1
  • Tagged with
  • 500
  • 68
  • 58
  • 52
  • 44
  • 38
  • 38
  • 35
  • 33
  • 33
  • 31
  • 31
  • 30
  • 29
  • 28
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Copper bismuth alloys

Greenidge, Samuel Marshall. January 1902 (has links) (PDF)
Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1902. / S. M. Greenidge determined to be Samuel Marshall Greenidge from "Forty-Firth Annual Catalogue. School of Mines and Metallurgy, University of Missouri". The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed December 4, 2008)
42

Artificial radioactive isotopes of thallium, lead, and bismuth. The use of uranium lead in the assignment of artificial radioactive isotopes.

Fajans, Kasimir, Voigt, Adolf Frank. January 1900 (has links)
From A.F. Voigt's Thesis (Ph. D.)--University of Michigan, 1941." / "Reprinted from the Physical review, v. 60, no. 9 ... November 1, 1941."
43

Nuclear reaction mechanisms in the heavy-element region

Donovan, Paul Francis. January 1958 (has links)
Thesis (Ph. D. in Chemistry)--University of California, Berkeley, Sept. 1958. / Also issued as UCRL-8347. Includes bibliographical references (leaves 53-57).
44

Note on the spectrum of the isotopes of lead. the structure of the bismuth line [lambda] 4722 ... /

Aronberg, Lester. January 1900 (has links)
Thesis (Ph. D.)--University of Chicago, 1917. / "Private Edition, Distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from the Astrophysical journal, vol. XLVII, no. 2, March 1918." Includes bibliographical references.
45

The electrolytic estimation of bismuth and its separation from other metals thesis ... /

Kammerer, Alfred Lewis. January 1902 (has links)
Thesis (Ph. D.)--University of Pennsylvania, 1902. / Includes bibliographical references.
46

Photoelectric cells sensitive to long wave length radiation: the bismuth sulfide cell

Mackay, Johnstone Sinnott, January 1940 (has links)
Thesis (Ph. D.)--Columbia University, 1940. / Vita.
47

The effect of temperature on the change of resistance of bismuth films in a magnetic field

Curtiss, Leon Francis, January 1900 (has links)
Thesis (Ph. D.)--Cornell University, 1922. / Caption title: Physical properties of thin metallic films. III. The effect of temperature on the change of resistance of bismuth films in a magnetic field. "Reprinted from physical review ... vol. XVIII, no. 4, October, 1921."
48

Solidification of undercooled bismuth-antimony alloys

Pinnow, Wayne Robert. January 1982 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 147-149).
49

Note on the spectrum of the isotopes of lead. : the structure of the bismuth line [lambda] 4722 ... /

Aronberg, Lester. January 1900 (has links)
Thesis (Ph. D.)--University of Chicago, 1917. / "Private Edition, Distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from the Astrophysical journal, vol. XLVII, no. 2, March 1918." Includes bibliographical references. Also available on the Internet.
50

High-pressure states of bismuth

Brown, Philip January 2017 (has links)
Bismuth is among the most studied of all elements, but its behaviour under pressure exhibits myriad unexpected puzzles even after many decades of research. Bismuth narrowly avoids being an insulator: a Peierls-type distortion almost completely gaps the electronic energy bands, producing a rhombohedral metal with a tiny overlap of conduction and valence bands. The resulting solitary free electron per 100,000 atoms can travel large distances in high-purity crystals, leading to a host of unusual properties. We show that the rhombohedral structure can be tuned with pressure, driving the carrier concentration to nearly zero. We compare our measurements to recent experimental advances implying the formation of novel electronic order driven by the pairing of low-density electrons and holes, and show evidence for a previously unseen phase at very low temperatures in the semiconducting state. We also present a method for calculating the carrier density and resistivity as a function of pressure, based on phenomenological band parameters and a simple charge-balance argument, and demonstrate that this approach can quite well describe most - but not all - of the observed behaviour of the resistivity. At higher pressures, bismuth undergoes a transition into a quasiperiodic host-guest structure. Here, two distinct crystal lattices coexist and interpenetrate, but the lattice parameters are incommensurate. This crystal thus lacks a single unit cell - an unexpected complexity for a simple element. The discovery of such unusual structures in elements is a new phenomenon and their physical properties are rather unexplored. We present experimental measurements of the resistivity and magnetic susceptibility in the incommensurate host-guest state. We argue that the experimental data (in particular, the shape of the normal-state electrical resistivity, and the high value of the low-temperature upper critical field) may be evidence for strong electron-phonon coupling. This strong coupling is consistent with theoretical predictions which suggest the presence of a low-energy phonon mode arising due to the vanishing energy cost of moving guest atoms through the host lattice.

Page generated in 0.0157 seconds