Jakimovski, Dragan

Preferred name

Jakimovski, Dragan

Official Name

Jakimovski, Dragan

Main Affiliation

dragan.jakimovski@gmail.com

Now showing 1 - 10 of 11

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Dataset for Polarization of Balmer alpha radiation resulting from H^++H collisions in Debye plasmas
(2015)
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Janev, Ratko
The linear polarization degree of Balmer alpha radiation resulting from Hþ þ Hð1sÞ collisions in a hot, dense weakly coupled plasma is studied in the energy range 1–140keV=u by adopting the Debye-H€uckel potential to represent the screened interaction between charged plasma particles. Due to the energy splitting of nl hydrogen states in the short range Debye-Huckel potential, the Balmer alpha radiation contains three components corresponding to 3s-2p, 3p-2s, and 3d-2p transi- tions, of which only the last two can be linearly polarized. For calculation of 3lm excitation and electron capture cross sections, the two-center expansion atomic orbital close coupling method is used for a number of Debye screening lengths. The effects of plasma screening on the 3lm cross sections are manifested in significant changes of their magnitudes and energy behavior with respect to the ones in the unscreened case, producing significant changes in the polarization degree of Balmer 3p-2s and 3d-2p lines.
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Dataset for Antiproton-impact ionization of hydrogen atom with Yukawa interaction
(2018)
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Grozdanov, Tashko
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Janev, Ratko
The process of ionization of hydrogen atom by antiproton impact is studied when the interparticle interactions in the system are described by screened interactions of Yukawa type. The collision dynamics is described by the semiclassical atomic-orbital close-coupling method in which the bound atomic states and positive energy continuum pseudostates are determined by diagonalization of target Hamiltonian in a sufficiently large even-tempered basis to ensure convergence of the results at each value of the screening length λ of the interaction. With decreasing the screening length, the bound states in the Yukawa potential become unbound, thus increasing the number of continuum pseudostates. At low collision energies, this leads to the increase of the ionization cross section. It is observed that the energies of pseudostates, generated by the exit of nl bound states in the continuum, at certain critical values λcnl exhibit series of avoided crossings when λ is varied. The avoided crossings appear between the (n + k)l and (n + k + 1)l (n =1, 2, 3, . . . ; k = 0, 1, 2, . . .) states at screening lengths close to the critical screening length λcnl . The avoided crossings become increasingly less pronounced with increasing n, k and l. The matrix elements for the (n + k)l − (n + k + 1)l transitions at the avoided crossings λ(n+k+1)l exhibit maxima and are reflected x,(n+k)l in the structure of the cross sections for population of the lower nl pseudostates. These structures are, however, smeared out in the total ionization cross section.
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Datasets for Electron capture, excitation and ionization processes in He2+–H collisions in dense quantum plasmas
(2018)
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Ratko K. Janev
Electron capture, excitation and ionization processes in He2+–H collisions taking place in quan- tum plasmas are studied by employing the two-center atomic orbital close coupling (TC-AOCC) method. The Debye-Hu ̈ckel-cosine (DHC) potential is used to describe the plasma screening effects on the Coulomb interaction between charged particles. The properties of eigenenergies of hydrogen-like atom with DHC potential are investigated as function of the screening length of the potential. It is found that the bind- ing energies of nl states decrease with decreasing the screening length of the potential. The dynamics of excitation, electron capture and ionization processes in He2+–H collision system is investigated when the screening length of the potential varies for a wide collision energy range. The TC-AOCC cross sections are compared with those for the pure Coulomb potential and, for the total electron capture, with the results of classical trajectory Monte Carlo method.
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Parallel Genetic Algorithms for Finding Solution of System of Ordinary Differential Equations
(Springer Berlin Heidelberg, 2012)
Jovanovski, Jane
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Dataset for CROSS SECTIONS FOR ELECTRON CAPTURE IN Li3+ + H(1s) COLLISIONS IN DEBYE PLASMAS
(2018)
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Raportaru, M.C.
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The data files attached to this paper follows the information presented on the corresponding figures. Some of them contains additional data, regarding state energies and charge transfer sections to higher states, which were not presented in the published version of the paper due to page limitations.
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Datasets for Electron capture and excitation in H^+ - Li^+ collisions
(2019)
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Ratko K. Janev
The data files attached to this paper follows the information presented on the corresponding figures. Some of them contains additional data, regarding state energies and charge transfer sections to higher states, which were not presented in the published version of the paper due to page limitations. In addition to published charge exchange and excitation cross sections we provide unpublished data for direct ionization section, obtained with the adopted basis.
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HYSTEROSALPINGOGRAPHY
(Macedonian Association of Anatomists and Morphologists, 2025-05-02)
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Nedelkoski, Martin
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To emphasize the role and value of hysterosalpingography (HSG) as a radiological procedure for investigation of the uterine cavity and the patency of the fallopian tubes. This is a retrospective study of a group of 43 patients with infertility examined at the University institute of radiology in Skopje, Republic of North Macedonia during a two months period in 2025. The HSG was part of the infertility examination, evaluation and treatment at the University clinic of gynecology and obstetrics in Skopje, Republic of North Macedonia. The mean age of the 43 patients included in the study was 34.02 years with a range of 20 to 47 years. Most of the participants, 27 (62.8%) had primary infertility. The period of infertility duration was under 5 years in 31 (72.1%) of the women. Hysterosalpingograms showed normal uterine morphology in 31(72.1%) of the included patients, tubal morphology was normal in 35 (81.4%) of the patients, while 42 (97.7%) of the 43 participants had normal cervical findings. The most prevalent uterine anomaly was the arcuate uterus present in 6 (13.9%) of the patients, while the rarest findings were the hypoplastic and the unicornuate uterus, each presenting in only 1 (2.3%) of the patients. Cervical insufficiency was detected in 15 (34.9%) of the patients. Patent tubal dilatation and hydrosalpinx were the most common tubal abnormalities, each finding appearing in 3 (7%) of the patients. Normal tubal patency was present in 36 (83.7%) of the included women, while 3 (7%) of the patients had bilateral tubal occlusion. HSG is a method of choice for demonstration of the uterine endometrial contour, filling of the fallopian tubes and intraperitoneal spillage of contrast with the purpose of establishing tubal patency
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Improvements of the Parallel Evolutionary Algorithm for Finding Solution of a System of ordinary Differential Equations
(Faculty of Computer Science and Engineering, Ss. Cyril and Methodius University in Skopje, Macedonia, 2012)
Jovanovski, Jane
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The goal of our research is to evaluate the general methods of finding solution of a system of differential equations. In this paper we present an improved parallelization approach of the two step parallel genetic algorithm approach that produces an analytical solution of the system. The evaluation of the algorithm reveals its capability to solve non-trivial systems in very small number of generations. In order to find the best solution, and due to the fact that the simulations are computational intensive, we use parallel grid genetic algorithms. Using the gLite based Grid, we propose a grid genetic solution that uses large number of computational nodes, that archives excellent performance. This research will be the basis on our goal of solving more complex research problems based around the Schrodingers equation.
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CT IMAGING OF LIVER CYSTIC ECHINOCOCCOSIS
(Македонско лекарско друштво = Macedonian medical association, 2025-04)
Begu, Aida
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Liver cystic echinococcosis (CE) is a zoonotic disease caused by the accidental infection of humans with the eggs of the tapeworm Echinococcus granulosus. Two-thirds of all cases present with hepatic involvement.
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BRAIN METASTASIS FROM LUNG CANCER
(Македонско лекарско друштво = Macedonian medical association, 2025-04)
Nedelkoski, Martin
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Lung cancer is the leading cause of global cancer incidence and mortality, accounting for 2,4 million new cases and 1,8 million deaths in 2022. The most common symptoms of lung cancer include persistent cough, hemoptysis, weight loss, chest pain and dyspnea. One of the most common metastatic sites of lung cancer is the brain, with intracranial involvement in approximately 20% of patients at the time of diagnosis, and although rare the initial presentation of the disease can derive from this site.

Jakimovski, Dragan

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