Ss. Cyril and Methodius University in Skopje
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Item type:Publication, BUILDING OF DISTRIBUTED RESTful SERVICES AND RESOURCES FOR AUTHORIZATION ISSUES.(Факултет за информатички науки и компјутерско инженерство, Скопје, 2023-10-25)Arber BeshiriIn systems, numerous services require access to shared resources. Ideally, under such circumstances, minimizing data duplication is highly desirable. SOA simplifies the development of such systems by establishing distinct services that can be utilized by multiple services (applications). REST is an architectural style rooted in SOA that serves as a basis for designing and building contemporary web services (applications). It provides a method for developing distributed services commonly referred to as REST or RESTful services. One of the key aspects of REST is that it is stateless, meaning that the service does not retain any information about previous requests. Typically, when developing a REST service for a specific dataset, we represent the whole data via the relevant service. In scenarios where enhanced flexibility is needed, such as those involving authorization and privacy concerns, should limit the dataset accessible by an application (service). To achieve this, based on the REST approach (style), it is implemented a dedicated service endpoint that can handle the required filtering. Following the authentication procedure, most web services-based applications use application-specific access control mechanisms to make authorization decisions. Services can interact with one another, sometimes relying on a trust-based relationship. However, if unauthorized access is gained to a particular service, it could potentially jeopardize the whole security system. In RESTful services, authorization plays a tremendous role in terms of security, so services are constantly charged with authorizing users. Security as an essential aspect of services affects that servers necessarily contain the authorization mechanism, and they must authorize each service for each of their requests. The management of authorization permissions is handled by a dedicated service within the distributed environment. Simultaneously, this approach facilitates the creation of more streamlined service implementations as the responsibility for authorization management is transferred to a central service, which directs all other services. A RESTful services’ authorization management framework is proposed and the possibility to manage service access authorization to specific services (resources) is described, implemented, analyzed, and compared. The study is concluded with the presentation of experimental results and evaluation derived from the implementation of the REST services based on the proposed framework. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Macroeconomic indicators for evaluating economic trends in the Republic of North Macedonia(2023-01)The dataset is provided for the purposes of the international semi-annual publication SEE-6 Economic Outlook, which provides an overview of economic trends and short-term forecasts for the Republic of North Macedonia and other countries from South-Eastern Europe that are subject to analysis such as: Serbia, Bosnia and Herzegovina, Croatia, Montenegro and Slovenia. - Some of the metrics are blocked by yourconsent settings
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, Results obtained after HPV DNA and E6/E7mRNA detection accompanied by IL-10 592C/A detected genotypic variants.(2022-04) - Some of the metrics are blocked by yourconsent settings
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.