133,565 research outputs found
Jahrbuch des S.A.C / 12 Panorama vom Pic d'Arzinol, 3002 m
No full text[Raphael] Ritz del. ad nat. ; Lith. F.Lips, BernGetönte LithographieFussleiste, rechts: Jahrbuch d. S.A.C. Bd. XI
Einstein’s Investigations of Galilean Covariant Electrodynamics prior to 1905
No full textEinstein learned from the magnet and conductor thought experiments how to use field transformation laws to extend the covariance to Maxwell’s electrodynamics. If he persisted in his use of this device, he would have found that the theory cleaves into two Galilean covariant parts, each with different field transformation laws. The tension between the two parts reflects a failure not mentioned by Einstein: that the relativity of motion manifested by observables in the magnet and conductor thought experiment does not extend to all observables in electrodynamics. An examination of Ritz’s work shows that Einstein’s early view could not have coincided with Ritz’s on an emission theory of light, but only with that of a conveniently reconstructed Ritz. One Ritz-like emission theory, attributed by Pauli to Ritz, proves to be a natural extension of the Galilean covariant part of Maxwell’s theory that happens also to accommodate the magnet and conductor thought experiment. Einstein's famous chasing a light beam thought experiment fails as an objection to an ether-based, electrodynamical theory of light. However it would allow Einstein to formulate his general objections to all emission theories of light in a very sharp form. Einstein found two well known experimental results of 18th and19th century optics compelling (Fizeau’s experiment, stellar aberration), while the accomplished Michelson-Morley experiment played no memorable role. I suggest they owe their importance to their providing a direct experimental grounding for Lorentz’ local time, the precursor of Einstein’s relativity of simultaneity, and do it essentially independently of electrodynamical theory. I attribute Einstein’s success to his determination to implement a principle of relativity in electrodynamics, but I urge that we not invest this stubbornness with any mystical prescience
Suncoast Ritz Building, D
No full textThe Suncoast Ritz building exterior.https://digitalcommons.usf.edu/gandy_street/5293/thumbnail.jp
Clubhütte am Stockje & Dent d' Hérens
No full textgez. v. R. Ritz ; Lith. F. LipsUnten rechts: "Jahrbuch d. S.A.C. Bd. XI"Die Ansicht erschien als nicht im Jahrbuch eingebundene Beilage in: Beilagen zum Jahrbuch des schweiz. Alpenklubs, Bd. 11, 1875-1876Aus der Sammlung Johann Müller-Wegmann; Depositum der SAC Sektion Uto in der Zentralbibliothek des SA
The use of positive and negative penalty functions in solving constrained optimization problems and partial differential equations
No full textThe Rayleigh-Ritz Method together with the Penalty Function Method is used to investigate the use of different types of penalty parameters. The use of artificial springs as penalty parameters is a very well established procedure to model constraints in the Rayleigh-Ritz Method, the Finite Element Method and other numerical methods. Historically, large positive values were used to define the stiffness coefficient of artificial springs, until recent publications demonstrated that it is possible to use negative values to define the stiffness coefficients of the springs. Furthermore, recent publications show that constraints can be enforced using positive and negative mass or inertia in vibration problems and in a more generic sense using eigenpenalty parameters which are penalty parameters in the matrix associated with the eigenvalue. Before the commencement of this thesis, solutions using artificial inertia were published only for beams and simple spring-mass systems.
In this thesis the use of all possible types of penalty parameters are investigated in vibration problems of Euler-Bernoulli beams, thin plates and shallow shells and in elastic stability analysis of Euler-Bernoulli beams, including penalty parameters associated with the geometrical stiffness matrix. The study includes the use of penalty parameters for both enforcing support boundary conditions and continuity conditions along structural joints.
This investigation started with the selection of the set of admissible functions that would: (a) allow modelling of beams, plates and shells in completely free boundary conditions; (b) not present any limitation in the number of functions that can be used in the solution. This gives the possibility to converge to the constraint solution and to model any type of boundary conditions.
The procedure proposed in this work combines several advantages: accuracy of the results, relative fast convergence, simplicity of the set of admissible functions and flexibility to define boundary conditions. While there are other procedures that may give better accuracy for specific cases, the proposed method is more widely applicable.
The procedure used in this work also includes a way to check for round-off errors and ill-conditioning in the results; as well as a way to bracket the exact solution with upper and lower-bound results
Disputatio medica inauguralis de hydrope ascite
No full textquam ... pro obtinendis summis in medicina honoribus & privilegiis doctoralibus publicae eruditorum censurae submittit Iohannes Ritzius Berneggâ Rhegusc. Ad d. ... Mart. an M. DC. XC. ...Datum auf Titelblatt hs. ergänzt: Ad d. 7. Mart.Enth. 28 ThesenDiss. med. Basel, 169
Ritz Hotel
No full textExterior view of Ritz Hotel. It is a three story building with fire escape. Automobiles are parked at the street. There is a traffic light on the lamppost.https://mavmatrix.uta.edu/specialcollections_wdsmithphotography/12912/thumbnail.jp
Panorama: Des Alpes Valaisannes et Bernoises : pris sur la pointe septentrionale de la Bella-Tola au dessus de Luc, dans la vallée d' Anniviers
No full textPanorama vom Bella Tola aufgenommen, östlich von St. Luc im Val d' Anniviers gelegenR. Ritz del.Nomenklatur am oberen und unteren BlattrandUnten links: "Les nombres indiquent en pieds de Paris les hauteurs prises au-dessus de la mer."Aus der Sammlung Johann Müller-Wegmann; Depositum der SAC Sektion Uto in der Zentralbibliothek des SA
Personal Papers (MS 80-0002)
No full textLetter from D. W. Kempner to Hotel Ritz thanking the hotel for the tentative reservation and acknowledges the rates of 850 or 1150 pesetas, noting that the 1150 pesetas apartment is one of the nicest. He confirms the reservation and assures the hotel that he will notify them a couple of weeks in advance if there are any changes to his plans
Measurement of the electron's electric dipole moment using YbF molecules: methods and data analysis
No full text21.06.13 KB. Ok to add the author accepted version to spiral. IO
- …
