67 research outputs found
Gravitation Interaction and Electromagnetic Interaction in the Relativistic Universe with Total Zero and Local Non-Zero Energy
In the model of flat expansive homogeneous and isotropic relativistic
universe with total zero and local non-zero energy the gravitation energy of
bodies and the elecromagnetic energy of charged bodies can be localised.Comment: LaTeX, 10 pages, 1 figur
<i>N,N</i>-bis-(dimethylfluorosilylmethyl)amides of <i>N</i>-organosulfonylproline and sarcosine: synthesis, structure, stereodynamic behaviour and <i>in silico</i> studies
(O→Si)-Chelate difluorides R3R2NCH(R1)C(O)N(CH2SiMe2F)2 (9a–c, R1R2 = (CH2)3, R3 = Ms (a), Ts (b); R1 = H, R2 = Me, R3 = Ms (c)), containing one penta- and one tetracoordinate silicon atoms were synthesized by silylmethylation of amides R3R2NCH(R1)C(O)NH2, subsequent hydrolysis of unstable intermediates R3R2NCH(R1)C(O)N(CH2SiMe2Cl)2 (7a–c) into 4-acyl-2,6-disilamorpholines R3R2NCH(R1)C(O)N(CH2SiMe2O)2 (8a–c) and the reaction of the latter compounds with BF3·Et2O. The structures of disilamorpholines 8a,c and difluoride 9a were confirmed by an X-ray diffraction study. According to the IR and NMR data, the O→Si coordination in solutions of these compounds was weaker than that in the solid state due to effective solvation of the Si–F bond. A permutational isomerisation involving an exchange of equatorial Me groups at the pentacoordinate Si atom in complexes 9a–c was detected, and its activational parameters were determined by 1H DNMR. In silico estimation of possible pharmacological effects and acute rat toxicity by PASS Online and GUSAR Online services showed a potential for their further pharmacological study
An Ap-Structure with Finslerian Flavor: I
A geometric structure (FAP-structure), having both absolute parallelism and
Finsler properties, is constructed. The building blocks of this structures are
assumed to be functions of position and direction. A non-linear connection
emerges naturally and is defined in terms of the building blocks of the
structure. Two linear connections, one of Berwald type and the other of the
Cartan type, are defined using the non-linear connection of the FAP. Both
linear connections are non-symmetric and consequently admit torsion. A metric
tensor is defined in terms of the building blocks of the structure. The
condition for this metric to be a Finslerian one is obtained. Also, the
condition for an FAP-space to be an AP-one is given.Comment: 13 pages, LaTeX file, typographical corrections. Part of a talk
presented at The International Conference on "Finsler Extensions of
Relativity Theory" held at Cairo, Egypt, November 4-10,200
The emergence of gravity as a retro-causal post-inflation macro-quantum-coherent holographic vacuum Higgs-Goldstone field
We present a model for the origin of gravity, dark energy and dark matter:
Dark energy and dark matter are residual pre-inflation false vacuum random zero
point energy (w=-1) of large-scale negative, and short-scale positive pressure,
respectively, corresponding to the "zero point" (incoherent) component of a
superfluid (supersolid) ground state. Gravity, in contrast, arises from the 2nd
order topological defects in the post-inflation virtual "condensate" (coherent)
component. We predict, as a consequence, that the LHC will never detect exotic
real on-mass-shell particles that can explain dark matter. We also point out
that the future holographic dark energy de Sitter horizon is a total absorber
(in the sense of retro-causal Wheeler-Feynman action-at-a-distance
electrodynamics) because it is an infinite redshift surface for static
detectors. Therefore, the advanced Hawking-Unruh thermal radiation from the
future de Sitter horizon is a candidate for the negative pressure dark vacuum
energy.Comment: 8 pages, no figures. To appear in Proc. DICE2008 From Quantum
Mechanics through Complexity to Spacetime: the role of emergent dynamical
structures. Castello Pasquini/Castiglioncello (Tuscany), September 22-26,
200
О физическом вакууме и нейтрино
Сегодня многие физики убеждены в том, что торсионные технологии скоро смогут решить все энергетические проблемы человечества - обеспечить людей неограниченными источниками света, тепла, электричества. Также находится и много скептиков, которые считают теории и исследования в области торсионных полей несостоятельными, противоречащими общепринятым представлениям.Сегодня многие физики убеждены в том, что торсионные технологии скоро смогут решить все энергетические проблемы человечества - обеспечить людей неограниченными источниками света, тепла, электричества. Также находится и много скептиков, которые считают теории и исследования в области торсионных полей несостоятельными, противоречащими общепринятым представлениям
Bringing spacecraft into solar-oriented attitude by the measurements of a single-axis angular-rate sensor and an optical solar sensor
The algorithm of the turn of the spacecraft from an initial arbitrary angular position at an arbitrary angular rate to a solar-oriented attitude is investigated. Minimum essential equipment of the motion control system required for the purpose of ensuring maintenance of solar orientation is defined: a solar sensor, a single-axis angular-rate sensor, low-thrust liquid rocket engines. A solution of the problem of defining the spacecraft angular rate vector by the measurements of the deviation of the optical axis of the solar sensor from the sun vector and the single-axis angular-rate sensor is presented. The conditions under which control action on the rocket engines for the purpose of changing the value of the angular-rate vector for the Sun to get into the field of viewing of the solar sensor or for the spacecraft stabilization are defined. Mathematical modeling of the spacecraft attitude control system with the unknown initial state vector of motion is carried out. The results of mathematical modeling confirmed the efficiency of the proposed algorithm in terms of reducing propellant fuel consumption and high-speed performance. In comparison with the known methods of solving the problem of reducing angular speed (a lengthy process with the use of a magnetic system or a fast process with the use of a three-axis angular-rate sensor and rocket engines) the duration of the process of reducing angular speeds is the same as in normal operation, however, at the same time the problem of bringing spacecraft into the solar oriented attitude is solved
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Stereochemical rearrangements of dibromides of hexacoordinated germanium containing amidomethyl and lactamomethyl chelate ligands
For the first time a slow (on the NMR time scale) dynamic exchange between two diastereomers of hexacoordinated dibromogermanes containing two amidomethyl and lactamomethyl C,O-chelate ligands has been observed at room temperature in solution. The influence of temperature and solvent on the ratio of diastereomers was studied. At higher temperatures only one set of signals of the products were detected in the NMR spectra. Based on the dynamic NMR and quantum-chemical calculations (ab initio FR 3-21G), as well as on the structures determined for these compounds in the solid state, a cis-configuration of monodentate ligands was proposed for one of the diastereomers and an all-trans-configuration for the other. At low temperatures interconversion of enantiomers in the cis-diastereomer was observed. In the case of bis[(N-methylacetamido)methyl]dibromogermane the activation and thermodynamic parameters of enantiomerization (DeltaG(298)(#) 12.0+/-0.1 kcal mol(-1), DeltaH(#) 10.7+/-0.3 kcal mol(-1), DeltaS(#) -4.6+/-2.5 cal mol(-1) K-1) and diastereomeric exchange OcCtBrcreversible arrowOtCtBrt (DeltaG(298)(#), 15.0+/-0.1 kcal mol(-1); DeltaH(#) 0.1+/-0.8 kcal mol(-1); DeltaS(#) -50.0+/-5.8 cal mol(-1) K-1; DeltaG(298)degrees -0.2+/-0.1 kcal mol(-1); DeltaHdegrees -0.8+/-0.8 kcal mol(-1); DeltaSdegrees -2.6+/-1.0 cal mol(-1) K-1) were determined. (C) 2003 Published by Elsevier Science B.V
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