1,965 research outputs found
Separator development for a heat sterilizable battery
Coating procedure for tape separator of heat sterilizable batter
Separator development for a heat sterilizable battery Quarterly report, 1 Jan. - 31 Mar. 1968
Dip coating method for manufacturing sterilizable battery tape separator
Radiative Symmetriebrechung in Links-Rechts Symmetrischen Modellen mit einer Shiftsymmetrie an der Planckskala
Under the assumption that the Standard Model is valid up to the Planck scale ΛPl ~1019 GeV, the quartic Higgs coupling exhibits near ΛPl a value remarkably close to zero. It is tempting to consider this feature as a manifestation of boundary conditions imposed by the embedding theory of gravity. In a stringy context this observation has recently been interpreted in terms of the scalar potential being invariant under a constant shift of the Higgs _eld at the Planck scale. In general, such boundary conditions are of special interest in the study of radiatively induced symmetry breaking in models with classical conformal invariance, as the Planck scale is connected to the breaking scale via the running of the scalar couplings. In this thesis, the Coleman-Weinberg symmetry breaking of the minimal classically conformally invariant left-right (LR) symmetric model is reconsidered in the presence of a shift symmetry which is generalized to the case of the LR symmetry. Within the restricted parameter space imposed by the shift symmetry, a large hierarchy between the LR breaking scale and the Planck scale can be generated. In order to stabalize the electroweak-scale as well, the model is extended by two fermionic representations, which contribute to the running of the scalar couplings
Separator development for a heat sterilizable battery Quarterly report, 1 Apr. - 30 Jun. 1968
Flame absorption spectroscopic analysis of support tape
Separator development for a heat sterilizable battery Quarterly report, Oct. 1 - Dec. 31, 1967
Zirconium oxide loadings and coating methods varied to improve separators for heat sterilizable batter
The bisymplectomorphism group of a bounded symmetric domain
An Hermitian bounded symmetric domain in a complex vector space, given in its
circled realization, is endowed with two natural symplectic forms: the flat
form and the hyperbolic form. In a similar way, the ambient vector space is
also endowed with two natural symplectic forms: the Fubini-Study form and the
flat form. It has been shown in arXiv:math.DG/0603141 that there exists a
diffeomorphism from the domain to the ambient vector space which puts in
correspondence the above pair of forms. This phenomenon is called symplectic
duality for Hermitian non compact symmetric spaces.
In this article, we first give a different and simpler proof of this fact.
Then, in order to measure the non uniqueness of this symplectic duality map, we
determine the group of bisymplectomorphisms of a bounded symmetric domain, that
is, the group of diffeomorphisms which preserve simultaneously the hyperbolic
and the flat symplectic form. This group is the direct product of the compact
Lie group of linear automorphisms with an infinite-dimensional Abelian group.
This result appears as a kind of Schwarz lemma.Comment: 19 pages. Version 2: minor correction
Saddle index properties, singular topology, and its relation to thermodynamical singularities for a phi^4 mean field model
We investigate the potential energy surface of a phi^4 model with infinite
range interactions. All stationary points can be uniquely characterized by
three real numbers $\alpha_+, alpha_0, alpha_- with alpha_+ + alpha_0 + alpha_-
= 1, provided that the interaction strength mu is smaller than a critical
value. The saddle index n_s is equal to alpha_0 and its distribution function
has a maximum at n_s^max = 1/3. The density p(e) of stationary points with
energy per particle e, as well as the Euler characteristic chi(e), are singular
at a critical energy e_c(mu), if the external field H is zero. However, e_c(mu)
\neq upsilon_c(mu), where upsilon_c(mu) is the mean potential energy per
particle at the thermodynamic phase transition point T_c. This proves that
previous claims that the topological and thermodynamic transition points
coincide is not valid, in general. Both types of singularities disappear for H
\neq 0. The average saddle index bar{n}_s as function of e decreases
monotonically with e and vanishes at the ground state energy, only. In
contrast, the saddle index n_s as function of the average energy bar{e}(n_s) is
given by n_s(bar{e}) = 1+4bar{e} (for H=0) that vanishes at bar{e} = -1/4 >
upsilon_0, the ground state energy.Comment: 9 PR pages, 6 figure
GEOMETRY AND INFORMATION FOR THE PRESERVATION OF A ROMAN MOSAIC THROUGH A HBIM APPROACH
Abstract. The archaeological site is a mine of data and information that helps to deepen the knowledge of its origin, history, and structure. This virtuous approach becomes even more effective when these data, properly processed and structured, form the basis for a project of conservation and enhancement of the cultural asset.The Roman mosaics dug in Castiglione delle Stiviere in 1995 represent an interesting case in which all the archaeological information, made available by the Superintendence, was used through an HBIM (Historical Building Information Modeling) approach for the conservation project. The Stratigraphic Units (US) of the findings have identified the strategy for the geometric and informative modeling of the BIM (Building Information Modeling) model and have also been exploited in the design phase for the project of the new roof structure and especially for the cost analysis. The structuring of the data by stratigraphic units was also used in the drafting of the preventive and planned conservation, necessary to enhance and prolong the state of good health of the property.This work has been developed in the internship activity within a training course on HBIM, in collaboration with the Diocese of Mantua, owner of the property
On embeddings of almost complex manifolds in almost complex Euclidean spaces
We prove that any compact almost complex manifold of real dimension admits a pseudo-holomorphic embedding in for a suitable positive almost complex structure . Moreover, we give a necessary and sufficient condition, expressed in terms of the Segre class , for the existence of an embedding or an immersion in . We also discuss the pseudo-holomorphic embeddings of an almost complex 4-manifold in
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