• Journal of Multimedia Information System
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• 제5권1호
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• pp.27-34
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• 2018

In recent years, with the blooming of Internet of Things (IoT) and Cloud Computing (CC), researchers have begun to discover new methods of technological support in all areas (e.g. health, transport, education, etc.). In this paper, in order to achieve a type of network that will provide more intelligent media-data transfer new technologies were studied. Additionally, we have been studied the use of various open source tools, such as CC analyzers and simulators. These tools are useful for studying the collection, the storage, the management, the processing, and the analysis of large volumes of data. The simulation platform which have been used for our research is CloudSim, which runs on Eclipse software. Thus, after measuring the network performance with CloudSim, we also use the Cooja emulator of the Contiki OS, with the aim to confirm and access more metrics and options. More specifically, we have implemented a network topology from a small section of the script of CloudSim with Cooja, so that we can test a single network segment. The results of our experimental procedure show that there are not duplicated packets received during the procedure. This research could be a start point for better and more efficient media data transmission.

• International Journal of Knowledge Content Development & Technology
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• 제13권1호
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• pp.75-100
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• 2023

With research data generation on the rise, Institutional Repositories (IR) are one of the tools to manage it. However, the variety of data practices across institutions, domains, communities, etc., often requires dedicated studies in order to identify the research data management (RDM) require- ments and mapping them to IR features to support them. In this study, we investigated the data practices for a few national universities in North Macedonia, including 110 participants from different departments. The methodology we adopted to this end enabled us to derive some of the key RDM requirements for a variety of data-related activities. Finally, we mapped these requirements to 6 features that our participants asked for in an IR solution: (1) create (meta)data and documentation, (2) distribute, share, and promote data, (3) provide access control, (4) store, (5) backup, and (6) archive. This list of IR features could prove useful for any university that has not yet established an IR solution.

• 치위생과학회지
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• 제6권3호
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• pp.159-162
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• 2006

이 연구의 목적은 타액이 산성일때 치아우식과 연관이 있는 Streptococcus mutans 와 Lactobacillus spp.의 양을 조사하여 치아우식의 지표로 사용될 수 있는지를 관찰한 외국인을 대상으로한 임상결과이다. 총 240개의 타액 표본들은 마케도니아(Macedonia), 스코프에(Skopje)에 위치한 St Kiril- Metodi 치과대학병원에서 환자 80명으로부터 얻었다. 표본들은 사전의 파라핀 저작(씹기)법에 의해 타액을 자극하여 얻어졌으나, 타액의 pH의 결정을 위해서 다른 자극은 사용되지 않았다. 치아우식 집단의 타액 1 ml에서 S. mutans는 100%의 confluent growth (CFU > $10^6$와 $10^4-10^5$) 였으나, Lactobacillus spp.는 78.3%였다. 대조표본 집단(건강하고 손상되지 않은 치아를 가짐)에서, confluent growth (CFU > $10^6$와 $10^5$)를 가지는 colony는 발견되지 않았다. 이와 달리, 두 집단 모두(60 + 20)에서 타액의 pH와 타액의 완충력으로부터 얻어진 결과는 상호연관이 있었다. 치아우식집단에서, 타액의 pH 결과치는 약산성(5.90 - 6.50)이었고, 타액의 완충력 역시 매우 낮았다(0.7ml 이하). 한편, 대조표본 집단에서, 타액의 pH는 중성(pH 7.01 - 7.7)이었고 타액 완충력은 높았다(1ml 이상). CRT-bacteria 시험법으로부터 얻은 타액 1 ml내($10^5$ CFU 이상)의 S. mutans와 Lactobacillus spp.의 증가된 수는 타액의 산성과 약산성 pH의 결과처럼 치아우식위험을 증가시켰다. 따라서, 타액 pH법과 완충력 측정법은 치아우식 위험을 예측 할 수 있으며, 치아우식 예방을 위해 유용한 측정법으로 사용될 수 있을 것으로 사료된다.

• Advances in Computational Design
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• 제5권1호
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• pp.13-34
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• 2020

As small size and complex metal machining components demand increases, cutting processes in microscale become necessary. Ball-end milling is a commonly used finishing process, which nowadays can be applied in the microscale size. Surface quality and dimensional accuracy are two basic parameters that affect small size components in their assembly and functionality. Thus, good quality can be achieved by optimizing the cutting conditions of the procedure. This study presents a 3D simulation model of ball-end milling in microscale developed in a commercial CAD software and its optical and computing results. These carried out results are resumed to surface topomorphy, surface roughness, chip geometry and cutting forces calculations that arising during the cutting process. A great number of simulations were performed in a milling machine centre, applying the discretized kinematics of the procedure and the final results were compared with measurements of Al7075-T651 experiments.

• Earthquakes and Structures
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• 제10권3호
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• pp.613-628
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• 2016

The effectiveness of the use of modern repair schemes for the seismic retrofit of existing RC structures were assessed on a comparative experimental study of carbon fiber-reinforced polymer (CFRP) strips and sheets for the repair of reinforced concrete members of RC frames, damaged because of cyclic loading. Two virgin, single - story, one - bay, 1/3 - scale frame specimens were tested under cyclic horizontal loading, up to a drift level of 4%. Then, virgin specimens, B and F, respectively, were repaired and retested in the same way. One, specimen RB, was repaired with epoxy injections and CFRP strips and one, specimen RF, was repaired with epoxy injections and CFRP sheets. The two specimens are used to examine the differences between the structural behavior of frames repaired using CFRP strips and frames repaired using CFRP sheets. Both qualitative and quantitative conclusions, based on the observed maximum loads, loading and reloading stiffness, hysteretic energy absorption and failure mechanisms are presented and compared. The repaired frames recovered their strength, stiffness and energy dissipated reasonably. The use of CFRP sheets was found more effective than CFRP strips, due to the proper anchorage.

• Asian-Australasian Journal of Animal Sciences
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• 제12권8호
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• pp.1324-1331
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• 1999

The aim of this paper is to propose the preservation of buffaloes not only as productive livestock, but also as a part of the biodiversity of wetlands and especially of the Greek wetlands. The water buffalo used to be an integral part of the biodiversity of many Greek wetland ecosystems, enriched their landscape, and provided invaluable services and products to the rural people and to the economy in general. Its total population before the 1950s was over 100,000 animals. Presently, it is found only in four wetland sites in Macedonia and Thrace and in the estuaries of Rivers Gallikos and Axios, with a total population of a few hundred animals. These wetlands are Ramsar Sites. Even this small population is threatened with immediate extinction because of the rapidly changing rural socio-economic conditions and the expansion of cultivated fields into wet meadows. Farmers and consumers are rapidly losing contact with this mammal and its products. This species possesses minimum requirements for treatment and is characterized by the ability of utilizing roughage of variable nutritional value. These factors are promising to render buffalo breeding a valuable branch of the Greek livestock sector, which can also contribute to the maintenance of the wetlands.

• Asian-Australasian Journal of Animal Sciences
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• 제25권6호
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• pp.880-885
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• 2012

In this experiment the effect of dietary carob pods in the growth performance of fattening pigs and their meat quality, including steak chemical composition and fatty acid profile, were examined. A total of 160 weaning piglets, 30 days old, were allocated into four equal groups with 4 subgroups of 5 female and 5 males each. The animals were fed with isocaloric and isonitrogenous diets, containing either 0 or 75 or 100 or 125 g of carob pods per kg of feed. At the end of the experiment, on the 180 day of age, carcass subcutaneous fat thickness, steak chemical composition and steak fatty acid profile were determined. The results of the experiment showed that the dietary addition of 75 or 100 g/kg carob pods increased body weight at slaughter and carcass weight. No significant effect was noticed on the other examined carcass parameters. Consequently, carob pods could be suggested as a potential feed for fattening pigs without any adverse effect on their meat quality.

• 유통과학연구
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• 제12권9호
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• pp.25-38
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• 2014

Purpose - Our study aims to analyze and assess aeronautics transport, to bring comprehensive insight about the existing potential in the new member states, candidate countries, potential candidate countries, and associated states. Methodology - The evaluation was carried out by applying qualitative methodology to the research results and on existing capabilities, to assess the overall research capability in the aeronautics transport mode of each country and region, in the European context. Results - Overall, countries with the strongest potential are the Czech Republic, Poland, Hungary, and Romania. The aeronautics research potential was evaluated as weak in as many as 11 countries, with Estonia, Bosnia-Herzegovina, Macedonia, Montenegro, Albania, and Moldova being evaluated as weak in all categories, and Latvia, Croatia, and Serbia being evaluated as weak overall but having at least one category evaluated as medium. Conclusion - Based on the research findings, there are recommendations regarding both the research policy and research activities related to the aeronautics transport mode. The findings contribute to the further development of EU aeronautics research and the aviation industry.

• Journal of Communications and Networks
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• 제16권2호
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• pp.183-192
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• 2014

This paper proposes a payment-based power control scheme using non-cooperative game with a novel pricing function in cognitive radio networks (CRNs). The proposed algorithm considers the fairness of power control among second users (SUs) where the value of per SU' signal to noise ratio (SINR) or distance between SU and SU station is used as reference for punishment price setting. Due to the effect of uncertainty fading environment, the system is unable to get the link gain coefficient to control SUs' transmission power accurately, so the quality of service (QoS) requirements of SUs may not be guaranteed, and the existence of Nash equilibrium (NE) is not ensured. Therefore, an alternative iterative scheme with sliding model is presented for the non-cooperative power control game algorithm. Simulation results show that the pricing policy using SUs' SINR as price punishment reference can improve total throughput, ensure fairness and reduce total transmission power in CRNs.

• International Journal of Advanced Culture Technology
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• 제10권4호
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• pp.39-66
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• 2022

Modern Bulgarian nationalists aspired towards incorporating the self-identified Bulgarian lands into the Bulgarian state. The Treaty of San Stefano ending the Russo-Turkish War of 1877-78 tantalizingly achieved these so-called national ideals. Great Power diplomacy quickly diminished Bulgaria's borders and international legal status with the 1878 Treaty of Berlin, exacerbating nationalist grievances. Bulgaria would expand vast resources to restore the San Stefano borders until Balkan Communist authoritarian regimes eventually suppressed the Macedonian issue as a foreign policy subject. Sofia's policy towards its neighbor has been overdetermined by the efforts of successive Bulgarian governments to institutionalize post-communist Bulgaria's own national identity. Bulgaria's integration into so-called Euro-Atlantic structures, i.e., NATO and the EU, had been the primary strategic objective of the Bulgarian authorities since the end of the Zhivkov regime. North Atlantic community security policy aims in response to the earliest post-Cold War foreign policy crises in the Western Balkans framed the parameters of Bulgarian diplomacy. The stabilization of FYROM in 2001, followed by Bulgaria's 2007 EU accession, led to Bulgarian nationalist values become more salient in Bulgarian politics and foreign policy. Sofia-Skopje relations are a test case for the effects of Europeanization on interdependent Balkan ethno-sectarian nationalisms and state territorial institutional development.