Ss. Cyril and Methodius University in Skopje
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Item type:Publication, Air pollution data: A dataset gathered through a crowd sensing platform(2015-01-14); ; This is a dataset on air pollution monitoring sourced from a crowd-sensing IoT platform. The dataset includes real-time data on various pollutants, including PM2.5, PM10, and NO2 levels, along with atmospheric data such as humidity and temperature. This data is collected across multiple urban locations in Skopje, North Macedonia. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dataset for Polarization of Balmer alpha radiation resulting from H^++H collisions in Debye plasmas(2015); Janev, RatkoThe 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dataset for Antiproton-impact ionization of hydrogen atom with Yukawa interaction(2018); - Some of the metrics are blocked by yourconsent settings
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Item type:Publication, Quality of cloud orchestrated services in 5G mobile networks(Faculty of Electrical Engineering and Information Technologies, UKIM, Skopje, 2017)Kitanov, StojanThe rapid increase of the mobile devices resulted the mobile users to demand more and more ubiquitous mobile broadband services comparable to the fixed broadband Internet. In that direction on a global level the number of research initiatives on 5G mobile networks has rapidly increased. 5G networks would act as a nervous system of the digital society, on the economy and people’s everyday lives and would create new paradigms of Internet services such as “Anything as a Service”, where the devices, terminals, machines, smart things and the robots would become innovative tools that would create applications, services, and data and at the same time would use them. In order to satisfy the requests for big data processing and more intelligent networking demands in 5G networks, the main trend in the last decade was to push the processing, computing and the storage of data in the Cloud Computing environment. However, the cloud alone encounters growing limitations for reduced latency, high degree of mobility, high scalability, and real-time execution. A new paradigm called Fog Computing has emerged to overcome the limitations in the Cloud Computing technology. The fog computing extends the cloud computing at the edge of the network, that distributes computing, data processing, and networking services closer to end users. It is an architecture where distributed edge and user devices collaborate with each other and with the clouds to carry out computing, control, networking, and data management tasks. The application of fog computing in 5G mobile networks would contribute significantly to improve the network performances in terms of spectral and energy efficiency, enable direct device-to-device wireless communications, and support the growing trend of network function virtualization and the separation of network control intelligence from radio network hardware. This doctoral dissertation performs an evaluation of the quality of cloud and fog orchestrated services in 5G mobile networks through the delay (latency), user throughput, and the energy efficiency for the power consumed. In addition, 5 possible algorithms are proposed for an optimal selection of the best 5G radio access network depending from the types of the services that have certain requirements in terms of throughput, latency, and energy efficiency of the power consumed. The performed analysis of the results of this doctoral dissertation demonstrate that 5G networks would have a great benefit of implementing the fog computing technology, because the fog computing technology possess mechanisms that would handle with the new up-coming services, which would require low latency, high level of mobility, high scalability and real-time execution. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental and numerical investigation of concrete columns reinforced with frp bars(Faculty of Civil Engineering, UKIM, Skopje, 2018)Guri, ZijadinPresented in the considered doctoral dissertation are original experimental and numerical comparative investigations of the behavior of concrete bridge piers reinforced by use of plain or standard reinforcement and, alternatively, by use of composite FRP bars representing a new specific composite material. After the introductory Chapter 1 that provides a brief presentation of the subject and the objectives of the realized specific experimental and analytical investigations, there follows Chapter-2 in which are displayed the specific physical-mechanical characteristics of the FRP bars as a new specific composite material that has been used as an alternative material for reinforcement of the models of the experimentally tested concrete bridge piers. Chapter 3 shows the characteristics of the designed and built experimental models of bridge piers reinforced by use of classical reinforcement, and alternatively, by use of composite FRP bars. Presented additionally are the applied integral procedure and the specific experimental equipment used for the realization of the original experimental cyclic tests on the models of bridge piers up to deep nonlinearity, including also the failure stage. All experimental tests have been realized under simultaneous effect of constant vertical loads and monotonous incremental cyclic horizontal loads up to failure enabling realistic simulation of seismic forces during real earthquakes. Chapter 4 provides a consistent presentation of the obtained original experimental results from all realized experimental nonlinear tests on concrete bridge piers reinforced by classical reinforcement and, alternatively, by FRP bars as a specific composite reinforcement. The obtained experimental results show that the applied composite reinforcement may become a sound alternative for the classical reinforcement in future, particularly in realization of specific technological solutions in specific environments and conditions of construction. Chapter 5 shows the developed refined nonlinear analytical models by use of the most advanced software solutions based on the general concept of the finite element method by successful application of the formulated nonlinear three-dimensional finite elements. The formulated refined nonlinear analytical model has successfully been verified based on the obtained original experimental results from the realized nonlinear experimental tests on models of bridge piers reinforced with classical reinforcement and composite reinforcement composed of incorporated FRP bars with the role of longitudinal reinforcement. Presented in the next chapter, Chapter 6, is the practical application of the formulated refined three-dimensional analytical model for analysis of the nonlinear seismic response of a real bridge with central piers reinforced by classical reinforcement and, alternatively, by a reinforcement composed of composite FRP bars. The results obtained from the performed nonlinear seismic analyses under the effect of real earthquakes have confirmed the extraordinary generality and thoroughness of the formulated analytical models. The formulated refined nonlinear analytical models may successfully be used in expert analyses of the nonlinear behavior of bridge structures under very strong earthquakes in case their middle piers are reinforced by the new composite reinforcement composed of FRP bars. The last, Chapter 7, provides conclusions drawn from the realized integral research activities as well as general directions for future investigations in the considered specific research field. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Markers for Prediction of Early Onset Neonatal Infection in Pregnancies with Prelabour Rupture of Membranes(Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, 2016)Ademi Ibishi, VloraIntroduction: Prelabour rupture of membranes (PROM) is a common event in obstetrics and early onset neonatal infection (EONI) is a serious neonatal consequence that can happen related to PROM. Early prediction of EONI is a desirable clinical goal because late diagnosis with delayed treatment increases neonatal morbidity and mortality. Despite ongoing research efforts, identifying efficient predictive markers of EONI in pregnancies with PROM remains a critical challenge. An additional challenge in developing countries is the availability and reliability of tests and testing. Aims of the study: The primary aim of this study is to investigate and to determine the predictive value for early onset neonatal infection of maternal serum C- reactive protein and white blood cell count and amniotic fluid glucose concentration, in patients presenting with prelabour rupture of membranes. The secondary aim of the study is to determine associated demographic and socio-economic risk factors for prelabour rupture of membranes in pregnant women of Kosova, a population that has not been studied related to PROM and EONI. This includes the rate of neonatal infection in newborn infants with a maternal history of prelabour rupture of membranes, other associated risk factors for early onset neonatal infection in pregnancies complicated with PROM, most common maternal complications, mode of delivery, and the antenatal care practices in Kosova. Material and Methods: A cross-sectional design was used to analyse a population of 200 pregnant women presenting to the Obstetrics and Gynecology Tertiary Center in Kosova (during 2013-2015) with prelabour rupture of membranes who gave birth to a single newborns. A questionnaire and evaluation form was used to collect data prospectively at admission and thereafter. Demographic characteristics collected included, antenatal profile, probable risk factors, mode of delivery and maternal and neonatal outcome were recorded and analyzed. Maternal serum, amniotic fluid, and vaginal swab samples were taken at the admission from all the women enrolled in the study with the purpose of determining the CRP, WBC, Glucose and maternal colonization. Results: In this study, 13 % of the newborns had EONI. The CRP cutoff value of >6 mg/L predicted early onset neonatal infection with a sensitivity of 92.3 %, a specificity of 60.9%, a PPV of 26.1 % and an NPV of 66 %. The area under receiver operating characteristics (ROC) curve for the maternal serum CRP was 0.84 (95 % CI, 0.745-0.934). Analysis of maternal white blood cell count and amniotic fluid concentration showed specificity, sensitivity, PPV and NPV of 57.6 %, 68.3%, 21.4 %, 91.5 % and 57.6 %, 33.9%, 11.5%, 84.3 % respectively. Identified risk factors for PROM included parity, previous PROM, and maternal colonization. Identified risk factors for PROM with EONI included the interval from membrane rupture to delivery, maternal genital tract colonization, newborn‟s birth weight, and gestational age at birth. Conclusion: Maternal serum CRP is the most accurate marker for prediction of EONI in pregnancies complicated with PROM, with a predictability of 84 %. This test is available in Kosova and is recommended to be conducted routinely in every pregnant women presenting with PROM. Maternal plasma WBC and amniotic fluid glucose concentration had a poor predictive value in prediction of EONI and may be used only as an additional test in combination with CRP for prediction of EONI in pregnancies complicated with PROM. It is also important to know that PROM- delivery interval, maternal colonization and gestational age and gestational weight at birth are associated risk factors for development of EONI as these can be evaluated critically when planning management of pregnancies complicated with PROM. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Complication grade of urinary function following radiation therapy treating pelvic malignancy(Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, 2018)Goga Çmega, VildanaIntroduction: Pelvic malignancy (cervical, rectal and endometrial carcinoma) are a very common and deadly disease. Adjuvant therapy consists of regimens that include both concurrent chemotherapy/radiotherapy (RT) and adjuvant chemotherapy. The aim of the study was to evaluate and analyze renal function through the changes in GFR (Glomerular Filtration Rate), using 3D conformal radiotherapy (3DCRT) techniques in the treatment of patients with pelvic malignancy, and to evaluate acute and late toxicity of GU genito-urinary tract, during and after treatment according RTOG (Radiotherapy Oncology Group) scoring system. Analyzing patients adverse GU effects at the 9 and 12th month of treatment have been also helped by using cystoscopy. Methods: This study was conducted at the Clinical Center of Kosovo, Oncology Department. Several variables were evaluated in 75 patients: sex, age, type of primary malignancy, median tumor dose (TD) evidence over 50 and under 50 Gray (Gy). Time of the appearance of toxicity was followed by GFR changes during 3- and 6-month follow-up period. At the beginning, at 3rd and 6th months of the treatment patient have been followed by fulfilling in the questioner according RTOG scoring system. Chemotherapy have been employed based on primary tumor site concurrently with radiotherapy. Median follow up (FU) have taken 12 months. To the patient that had G2 and G3 adverse genito-urinary effects regarding RTOG at month 9 up to 12, was performed cystoscopy. Patients with pretreatment genitourinary morbidity (PGUM) were excluded from the study and patients who had genito-urinary problems such as obstruction in the beginning of treatment with the urinary tract ultrasonography examination have been excluded. Results: Our cohort consisted of 75 patients with pelvic malignancy, of whom 53 (70.7%) were female and 22 (29.3%) male. The average age of the patients included in the study was 57.5± 11.2 years. Thirty (40.0%) of the 75 patients had rectal carcinoma, 28 (37.3%) cervical cancer and 17 (22.7%) endometrial carcinoma. The average value of GFR in the beginning was 71.7± 23.1ml/min, it was 75.6 ± 25.6ml/min three months after beginning of therapy and 79.1±25.9 ml/min six months after therapy. The test of comparison showed a significant statistical difference between the values of GFR at the baseline of treatment vs three months after therapy (P<0.05), baseline of therapy vs six months after therapy (P <0.001), while there was no difference between GFR values three months and six months after therapy. In the follow up after 3 months, 11 patients (14.7 %) had G1 GU toxicity that did not need any kind of treatment. 5 patients (6.7%) had G2 GU toxicity. Whereas in the follow up after 6 months 15 patients (20%) had G1 GU toxicity, 7 patients (9.3%) G2 GU toxicity and 4 patients (5.3%) had G3 GU toxicity. Compering grade of toxicity between follow up 3 and 6 months no significant differences have been appeared according RT treatment. At the 9-12 months follow up we reached incidence of grade 1 and grade 2 urinary AEs (adverse effects) is 26.66%. Conclusion: Overall, the kidney function improved at 3 and 6 months in majority of patients. No significant differences in treatment related site effects between radiotherapy and chemo-radiation groups were found. Grade 3 AEs mostly have been appeared according to locally advanced cancer and progression after treatment. Patients that have performed cystoscopy have had slight or occasional damage to the walls of the bladder and they have not need any treatment. Same patients had like cystitis feeling symptoms with often wanting urination, straining to pass urine and burning urination. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dataset for CROSS SECTIONS FOR ELECTRON CAPTURE IN Li3+ + H(1s) COLLISIONS IN DEBYE PLASMAS(2018); ; 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Antimicrobial efficacy of Еrbium laser in endodontic treatment of infected root canals(Faculty of Dentistry, Ss. Cyril and Methodius University, Skopje, 2017)Dragidella, AgimeBACKGROUND: This study was conducted to estimate efficacy of Er:YAG laser compared to different antibacterial methods in therapy of infected root canals. Chemo-mechanical irrigation or only instrumentation techniques for cleaning the infected root canals does not ensure complete removal of microorganisms due to anatomy of root dentin, where microorganisms can form complex biofilm or can penetrate into dentin tubules. Repeated infections are possible. Our research determined whether there are differences in disinfecting efficacy between the testing methods, and if laser application with Er:YAG laser could be used in clinical terms as sufficient for therapy. METHODS: In the study 200 freshly extracted premolar single-rooted teeth were included. The crown of each tooth was cut off obtaining 15 mm long root canal. The apical part was drilled through. Teeth were sterilized with absolute alcohol. 200 teeth were equally divided into four groups depending on the strain which were they inoculated with (Enterococcus faecalis, Candida albicans, Streptococcus sanguinis, Fusobacterium nucleatum). The growth of the biofilm was confirmed microbiologically on agar plates. Three different treatments were applied; laser radiation with Er:YAG laser, irrigation with 5.20% NaOCl or Qmix. Viability of microorganisms in the samples after treatments and compared to samples without treatment, were analyzed with a fluorescence method by flow cytometry. RESULTS: Results indicated that all treatment methods effectively eliminated major percent of microbial cells. Statistically significant differences in mean percentage of dead cells between tested organisms (p<0.05) for radiation with Er:YAG laser 30 and 90 seconds, irrigation with 5.20% NaOCl and almost (p=0.052) for irrigation with Qmix were observed. There were statistically significant differences between treatment methods (p<0.001) for all microorganisms, as well as in interaction between tested organisms and treatment methods (p=0.040). The percent of dead cells was significantly higher for C. albicans and S. sanguinis compared to E. faecalis or F. nucleatum in all treatment groups. Longer duration of irradiation showed was statistically significant compared to 30-seconds irradiation (p<0.001) and achieved over 80% of dead cells. Disinfecting activity in combination with irrigant was over 90% for addition of NaOCl and over 95% for addition of Qmix. CONCLUSIONS: According to the results we can conclude that Er:YAG irradiation and its disinfecting capabilities could be used sufficiently as standard disinfection method in endodontics, or can serve as adjuvant therapy to standard mechanical and irrigational treatments. However, this study included only 200 samples, so we need to expand study to more samples of root canals or even in in vivo conditions.