The computer aided engineering and the respective computer aided design tools compose a modern mechanical modelling environment for the textile materials. The numerical mechanical models of the ...textile structures are a strong tool for the in-depth study of the mechanical properties and the behaviour of the textiles. The precision of these models in terms of their accuracy in representing the exact geometry of the real textile structures is the fundamental factor affecting the overall success of the idealisation. This paper discusses older traditional analytical models (Peirce, Saw-tooth, Kemp) as well as some variations of these fundamental models. Their numerical solutions are successfully compared to the experimental measurements of the yarn longitudinal deformation parameters using microscopic and digital image processing techniques. The results of the analytical models are compared with the actual measurements and the more precise models are indicated.
Strange and multistrange baryon production is expected to be enhanced in heavy ion interactions if a phase transition from hadronic matter to a Quark-Gluon Plasma takes place. The production yields ...of
Λs,
Λ
s,
Ξ
−s, and
Ξ
+
s relative to the production of negative particles are presented for sulphur-tungsten interactions at 200 GeV/
c per nucleon. These production yields are compared to those produced in proton-tungsten interactions and the enhancements of strange and multistrange baryons and antibaryons are presented.
The WA94 experiment uses the production of strange particles and antiparticles to investigate the properties of hot hadronic matter created in heavy-ion interactions. Λ,
Λ
,
Ξ
− and
Ξ
+
particle ...yields and transverse mass spectra are presented for pS interactions. These results are compared with those from SS interactions. Our results are also compared with those from pW and SW interactions of the WA85 experiment.
Let \(X\) be a finite-dimensional Banach space; we introduce and investigate a natural generalization of the concepts of Hadwiger number \(H(X)\) and strict Hadwiger number \(H'(X)\). More precisely, ...we define the antipodal Hadwiger number \(H_\alpha(X)\) as the largest cardinality of a subset \(S \subseteq S_X\), such that \(\forall x \neq y \in S \,\,\, \exists f \in B_{X^*}\) with \1 \le f(x)-f(y) \,\,\, \textrm{and} \,\,\, f(y) \le f(z) \le f(x) \,\,\, \textrm{for} \,\,\, z \in S.\ The strict antipodal Hadwiger number \(H'_\alpha(X)\) is defined analogously. We prove that \(H'_\alpha(X)=4\) for every Minkowski plane and estimate (or in some cases compute) the numbers \(H_\alpha(X)\) and \(H'_\alpha(X)\), where \(X=\ell_p^n, 1 < p \le +\infty\) and \(n \ge 2\). We also show that the number \(H'_\alpha(X)\) grows exponentially in \(\dim X\).
Strange and multistrange baryon and antibaryon production is a useful probe into the dynamics of the hot hadronic matter created in central heavy ion interactions. Relative production yields and ...transverse mass spectra are presented for Λ,
Λ
, Ξ
− and
Ξ
+ hyperons produced in central sulphur-tungsten interactions at 200 GeV/
c per nucleon.
The relative production yields and transverse mass spectra for Λ,
Λ
,
Ξ
− and
Ξ
+
hyperons in proton-tungsten interactions are presented and compared with the WA85 results from central ...sulphur-tungsten interactions. A study of the negative particle yield has also been undertaken and the ratio of Λ hyperons to negative particles has been calculated.
Process design and operation is typically concerned with the optimal selection and efficient utilization of assets and resources during a time horizon of interest. The degree of utilization of these ...assets (e.g. equipment units) and resources, however, is critically associated with the availability level of equipment components, which is determined by the initial reliability characteristics and the implemented maintenance policy. This work introduces a
system effectiveness optimization framework to properly account for maintainability characteristics at the process design level. This requires: (i) the quantification of the impact of process design on the selection of optimal maintenance policies, and (ii) the consideration of the interactions between production and maintenance planning in the operation phase of the process. The overall problem is formulated as a mixed integer linear programming (MILP) model and the applicability of the latter model is demonstrated by a numerical example.
Results on central production of charged kaons in sulphur-tungsten interactions have been obtained by the WA85 Collaboration. The procedure used to select K
+ and K
− particles, identified through ...their decay to three charged pions, is described. The
m
T
spectra for K
+ and K
− and the ratio
K
+
K
−
, calculated in the kinematic region
p
T
≥ 0.9 GeV/
c and 2.3 ≤ y
lab
≤ 3.0 are presented.
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