Tehnike mrežnog planiranja

U okviru teme obrađene su tehnike linijskog i mrežnog planiranja proizvodnje. Prvi dio obuhvaća planiranje proizvodnje kao jedno od osnovnih načela organizacije rada. U nastavku slijedi detaljniji prikaz korištenja Gantt-ovih dijagrama pri linijskom planiranju proizvodnje u svrhu određivanja ciklusa proizvodnje. Na dijelu tehnika mrežnog planiranja naglasak je stavljen na analizu strukture i način numeriranja mrežnih dijagrama, a zatim su opisane Metoda kritičnog puta (CPM) i Metoda ocjene i revizije programa (PERT). U posljednjem djelu rada planiran je proizvodni proces proizvodnje donje sapnice u poduzeću Jedinstvo-P\NO d.o.o. Proces je obrađen primjenom metode kritičnog puta, te prikazana analiza dobivenih rezultata

Creating two-dimensional bright solitons in dipolar Bose-Einstein condensates

We propose a realistic experimental setup for creating quasi-two-dimensional (2D) bright solitons in dipolar Bose-Einstein condensates (BECs), the existence of which was proposed in Phys. Rev. Lett. 100, 090406 (2008). A challenging feature of the expected solitons is their strong inherent anisotropy, due to the necessary in-plane orientation of the local moments in the dipolar gas. This may be the first chance of making multidimensional matter-wave solitons, as well as solitons featuring the anistropy due to their intrinsic dynamics. Our analysis is based on the extended Gross-Pitaevskii equation, which includes three-body losses and noise in the scattering length, induced by fluctuations of currents inducing the necessary magnetic fields, which are factors crucial to the adequate description of experimental conditions. By means of systematic 3D simulations, we find a ramping scenario for the change of the scattering length and trap frequencies which results in the creation of robust solitons, that readily withstand the concomitant excitation of the condensate.Comment: Accepted for publication in Physical Review

A FASHION COLLECTION INSPIRED BY THE SIXTIES

U završnom radu bavit ću se istraživanjem 60- tih godina prošlog stoljeća, te ću se tom temom nadahnuti i inspirirati kroz svoje kreativne radove. No također će radovima zavladati i moj osobni „rukopis“, a to će dati poseban čar tom desetljeću. Zinteresirana sam baš za to razdoblje, upravo zato što se kroz to vrijeme moda nekako oslobodila, samim time što se pojavljuje „mini suknja“ koja je do tada bila nezamisliva

Collisions of anisotropic two-dimensional bright solitons in dipolar Bose-Einstein condensates

We investigate the coherent collision of anisotropic quasi-two-dimensional bright solitons in dipolar Bose-Einstein condensates. Our analysis is based on the extended Gross-Pitaevskii equation, and we use the split-operator method for the grid calculations and the time-dependent variational principle with an ansatz of coupled Gaussian functions to calculate the time evolution of the ground state. We compare the results of both approaches for collisions where initially the solitons are in the repelling side-by-side configuration and move towards each other with a specific momentum. We change the relative phases of the condensates, and introduce a total angular momentum by shifting the solitons in opposite direction along the polarization axis. Our calculations show that collisions result in breathing-mode-like excitations of the solitons.Comment: 8 pages, 4 figure

Can One Discriminate between High-Growth Firms in Terms of Their Technology Specificity? An Empirical Verification

The authors aim to address two issues relating to the asset specificity of firms with respect to their technology. By applying discriminant analysis to a sample of fast-growing firms, they attempt to develop simple and robust prediction equations. These equations would in turn utilise a few items of circumstantial information regarding firms to predict whether they are likely to invest relatively more in the R&D of new products or services or if they are likely to possess more or less specific technology

Knowledge‐Based Assignment Model for Allocation of Employees in Engineering‐to‐Order Production

In today’s rapidly changing business environment, it is necessary to react promptly in response to the product changes that happen constantly in an Engineering‐to‐Order production environment. Very often, there is not sufficient time to educate employees regarding new and necessary knowledge. If we insist on the standardization of a process execution, the process always requires appropriate knowledge from among available employees. In this chapter, an option for adjusting processes to available knowledge is studied. Following calculations, it was concluded that a partial corruption of a perfect process leads to a better knowledge alignment of employees. At first, with the corruption of a perfect process, its efficiency is decreased, but with better knowledge alignment, process efficiency is consequently increased to a level better than the original one. The optimization model presented in this chapter is based on a modified classic assignment problem and it includes a numerical example based on the data of ETO company. We proved our findings from the aspects of balance, employee capacity load and process efficiency