Izrada gantograma dokovanja na plutajućem doku

Brodovi i razni drugi pomorski objekti nakon određenog vremena provedenog u ekspoataciji, ili zbog nekih izvanrednih okolnosti kao što su havarije, moraju obaviti remont u nekom od remontnih brodogradilišta. Objekti se najčešće dokuju zbog izvođenja raličitih radova vezanih uz podvodni dio trupa ili zbog periodičnih pregleda vještaka Registra i sl. Primjeri takvih radova su sanacije oštećenja trupa, radovi na propeleru, listu kormila, AKZ tretman podvodnog dijela trupa. Remont se najčešće odvija na plutajućim dokovima na kojima se brod ili neki pomorski objekt relativno jednostavno digne iz vode. Uz pomoć plutajućih dokova remont se može izvršiti jednostavno i brzo. Ovaj rad pokazuje detaljan prikaz procesa te akcije potrebne za izvršavanje nekog od istih te njihova moguća poboljšanja

Remarks on the hadronic matrix elements relevant to the SUSY K-Kbar mixing amplitude

We compute the 1-loop chiral corrections to the bag parameters which are needed for the discussion of the SUSY K-Kbar mixing problem in both finite and infinite volume. We then show how the bag parameters can be combined among themselves and with some auxiliary quantities and thus sensibly reduce the systematic errors due to chiral extrapolations as well as those due to finite volume artefacts present in the results obtained from lattice QCD. We also show that in some cases these advantages remain as such even after including the 2-loop chiral corrections. Similar discussion is also made for the K --> pi electro-weak penguin operators.Comment: 13 pages, 3 figures [added 1 reference and a discussion about the impact of the NNLO chiral corrections to the "golden ratios" (c.f. Sec.6)

B-parameters of the complete set of matrix elements of (Delta B = 2) operators from the lattice

We compute on the lattice the ``bag'' parameters of the five (Delta B = 2) operators of the supersymmetric basis, by combining their values determined in full QCD and in the static limit of HQET. The extrapolation of the QCD results from the accessible heavy-light meson masses to the B-meson mass is constrained by the static result. The matching of the corresponding results in HQET and in QCD is for the first time made at NLO accuracy in the MSbar(NDR) renormalization scheme. All results are obtained in the quenched approximation.Comment: 27 pages (5 figures

Estimate of the chiral condensate in quenched lattice QCD

We determine the value of the quark condensate from quenched QCD simulations on the lattice in two ways: (i) by using the GMOR formula; (ii) by comparing the OPE prediction for the Goldstone pole contribution to the pseudoscalar vertex, at moderately large momenta. In the MSbar scheme at mu=2 GeV, from the GMOR formula we obtain = -(273 +/- 19 MeV)^3. We show that the value extracted from the pseudoscalar vertex, = - (312 +/- 24 MeV)^3, is consistent with the result obtained from the first (standard) method.Comment: 13 pages, 2 figures [version published in PLB

On internal structure of the heavy-light mesons

We compute the radial distributions of the vector and axial charge density as well as of the matter density in the heavy-light mesons on the lattice. The results for the lowest lying static heavy-light mesons and their first excited counterparts are obtained with Nf=2 dynamical quarks of Wilson (Clover) type and with the various improved static heavy quark actions. From these distributions we were able to compute the corresponding charges and slopes of the form factors (i.e. ). Those results are also presented, and briefly discussed too.Comment: 31 page, 6 figures (published version

Impact of the finite volume effects on the chiral behavior of fK and BK

We discuss the finite volume corrections to fK and BK by using the one-loop chiral perturbation theory in full, quenched, and partially quenched QCD. We show that the finite volume corrections to these quantities dominate the physical (infinite volume) chiral logarithms.Comment: 16 pages, 3 figures [published version

Chiral behavior of the B(s,d)-Bbar(s,d) mixing amplitude in the Standard Model and beyond

We compute the chiral logarithmic corrections to the Bd and Bs mixing amplitudes in the Standard Model and beyond. We then investigate the impact of the inclusion of the lowest-lying scalar heavy-light states to the decay constants and bag-parameters and show that this does not modify the pion chiral logarithms, but it does produce corrections which are competitive in size with the K- and eta-meson chiral logarithms. This conclusion is highly relevant to the lattice studies since the pion chiral logarithms represent the most important effect in guiding the chiral extrapolations of the lattice data for these quantities. Also important is to stress that the pion chiral logarithmic corrections are useful in guiding those extrapolations as long as Mpi << Delta, where Delta is the mass gap between the scalar and pseudoscalar heavy-light mesons.Comment: 16 pages, 5 figures (published version

g(B*Bpi)-coupling in the static heavy quark limit

By means of QCD simulations on the lattice, we compute the coupling of the heavy-light mesons to a soft pion in the static heavy quark limit. The gauge field configurations used in this calculations include the effect of N_f=2 dynamical Wilson quarks, while for the static quark propagator we use its improved form (so called HYP). On the basis of our results we obtain that the coupling g=0.44 +/- 0.03 (+0.07/-0.00), where the second error is flat (not gaussian).Comment: 7 pages, 3 figs (published version

On the mass differences between the scalar and pseudoscalar heavy-light mesons

We discuss the recent experimental observation which suggested that the mass difference between the scalar and pseudoscalar heavy-light mesons is larger for the non-strange states than for the strange ones. After computing the chiral corrections in the heavy quark limit we show that, contrary to experiment, the mass difference in the non-strange case should be smaller.Comment: 10 pages, 2 figure

Soft Photon Problem in Leptonic B-decays

We point out at the peculiarity of B --> mu nu decay, namely the enhancement of the soft photon events which originate from the structure dependent part of the B --> mu nu gamma amplitude. This may be a dominant source of systematic uncertainty and compromise the projected experimental uncertainty on Gamma(B --> mu nu). We show that the effect of these soft photons can be controlled if the experimental cut on identification of soft photons is lowered and especially if the better resolution in identifying the momentum of muon emerging from B --> mu nu, is made. A lattice QCD computation of the relevant form factors would be highly helpful for a better numerical control over the structure dependent soft photon emission.Comment: 16 pages, 3 figure