A avaliação de comportamento de tanques acoplados é de grande interesse industrial, por normalmente estarem presentes em várias partes diversos processos, como por exemplo, em empresas petroquímicas, de celulose ou tratamento de água. Este trabalho busca modelar um sistema de tanques em série a partir das medições feitas em uma unidade piloto do curso de engenharia química da UFCG. O projeto é constituído por dois tanques em série, um reservatório de alimentação e uma bomba centrífuga que é responsável pela alimentação do primeiro tanque. Para a modelagem do sistema foram adotadas duas abordagens: a lei de Ohm e a primeira lei da termodinâmica aplicada a sistemas abertos. A partir da análise dos resultados, observa-se a clara aderência dos dados experimentais através de validação estatística.

: Secure remote user authentication is an authentication technique in which the remote server authorizes the identity of the user through an insecure communication network. Since then diverse remote user authentication schemes have been proposed, but each category has its advantages and disadvantages. Besides its strength and weakness, remote user authentication systems have a great impact on real-time applications such as E-health applications, telemedicine applications, Internet of Things (IoT), Cloud, and Multi-server applications. The implementation of the Tele Medicine Information System (TMIS) over public networks continues to disclose confidential information to unauthorized entities. Similarly, remote user authentication techniques have become essential in accelerating IoT as well. Security is a major concern in IoT because it allows secure access to remote services. Cloud computing services and a Multi-server environment share data among different end-users through the internet which also needs security as its paramount concern. Although intensive efforts were made in designing remote user authentication scheme for health care, IoT, Multi-server and cloud applications, the majority of these applications suffers either from security attacks or lagging of critical features. This paper presents an analytical and comprehensive survey of various remote user authentication techniques and categorizes them based on different applications. Furthermore, the state of art recent remote user authentication techniques have been compared, their advantages, key features, computational cost, storage cost, and communication cost are highlighted.

The environment in which the decision-making process takes place is often characterized by uncertainty and vagueness and, because of that, sometimes it is very hard to express the criteria weights with crisp numbers. Therefore, the application of the Grey System Theory, i.e., grey numbers, in this case, is very convenient when it comes to determination of the criteria weights with partially known information. Besides, the criteria weights have a significant role in the multiple criteria decision-making process. Many ordinary multiple criteria decision-making methods are adapted for using grey numbers, and this is the case in this article as well. A new grey extension of the certain multiple criteria decision-making methods for the determination of the criteria weights is proposed. Therefore, the article aims to propose a new extension of the Step-wise Weight Assessment Ratio Analysis (SWARA) and PIvot Pairwise Relative Criteria Importance Assessment (PIPRECIA) methods adapted for group decision-making. In the proposed approach, attitudes of decision-makers are transformed into grey group attitudes, which allows taking advantage of the benefit that grey numbers provide over crisp numbers. The main advantage of the proposed approach in relation to the use of crisp numbers is the ability to conduct different analyses, i.e., considering different scenarios, such as pessimistic, optimistic, and so on. By varying the value of the whitening coefficient, different weights of the criteria can be obtained, and it should be emphasized that this approach gives the same weights as in the case of crisp numbers when the whitening coefficient has a value of 0.5. In addition, in this approach, the grey number was formed based on the median value of collected responses because it better maintains the deviation from the normal distribution of the collected responses. The application of the proposed approach was considered through two numerical illustrations, based on which appropriate conclusions were drawn.

Blockchain technology has received more and more attention from all walks of life and has also been sought after by the market and financial institutions. More and more financial institutions and Internet companies have begun to participate in the research of blockchain technology. The application scenarios are also constantly expanding, and the landing in the financial field is the focus of all social concerns. This article takes Agricultural Bank as an example, analyzes its current advantages and disadvantages in using blockchain technology, and proposes policy recommendations based on this to provide a reference for joint-stock commercial banks to better use blockchain technology to improve business performance. Based on the theoretical analysis, this article studies the use of blockchain technology by joint-stock commercial banks, and selects Agricultural Bank, which has a well-developed financial technology in joint-stock commercial banks, as a case study. From the operating background of the agricultural bank and the cross-border payment and settlement business, the background begins with the agricultural bank's own business practices in blockchain technology and the traditional cross-border business and the innovative development of agricultural bank's blockchain technology, and then the application of event analysis to the application effects of agricultural bank's blockchain technology analysis. This paper analyzes the SWOT-PEST of the agricultural bank's use of blockchain technology, combined with the theoretical analysis of blockchain technology in this article, comprehensively analyzes the agricultural bank's use of blockchain technology in four aspects: policy, economy, society, and technology. Strengths, weaknesses, opportunities, and challenges. Through analysis, we can have a comprehensive view on the application of blockchain technology by Agricultural Bank, and based on this, we can summarize the problems that Agricultural Bank may have in applying blockchain technology. Through the analysis of the blockchain, we can see that the growth rate of agricultural bank's net profit was higher in 2013 and 2014. Finally, the article puts forward suggestions for the development of agricultural bank under the blockchain technology.

The potential re-use of red mud in the building and construction industry has been the subject of research of many scientists. The presented research is a contribution to the potential solution of this environmental issue through the synthesis of potential construction materials based on red mud. A promising way of recycling these secondary raw materials is the synthesis of alkali-activated binders or alkali activated materials. Alkali-activated materials or inorganic binders based on red mud are a new class of materials obtained by activation of inorganic precursors mainly constituted by silica, alumina and low content of calcium oxide. Since red mud contains radioactive elements like 226Ra and 232Th, this may be a problem for its further utilization. The content of naturally occurring radionuclides in manufactured material products with potential application in the building and construction industry is important from the standpoint of radiation protection. Gamma radiation of the primordial radionuclides, 40K and members of the uranium and thorium series, increases the external gamma dose rate. However, more and more precedence is being given to limiting the radiological dose originating from building materials on the population these days. The aim of this research was to investigate the possible influence of alkali activation-polymerization processes on the natural radioactivity of alkali activated materials synthesized by red mud (BOKSIT a. d. Milici, Zvornik, Bosnia and Herzegovina) and their structural properties. This research confirmed that during the polymerization process the natural radioactivity was reduced, and that the process of alkali activation of raw materials has an influence on natural radioactivity of synthesized materials.

This paper emphasizes an importance of the document from 1725, which was so far neglected in the historiography of the Bosnian medieval tombstones - stećci. It is a report written after the establishment of the border between the Habsburg Monarchy and the Ottoman Empire as a result of the Treaty of Passarowitz in 1718. Although very brief, this document undoubtedly indicates the existence of a necropolis of stećci-tombstones in Bijeljina, or its immediate vicinity, as well as in the area of the settlement of Kobaš on banks of the river Sava. After the mention of stećci in the travelogue of Benedikt Kuripešić in 1530, these data represent the second oldest mention of these medieval tombstones in written sources, and per se deserve attention. There are indications that the monuments mentioned in this report, or at least some of them, could be linked to those stećci that were ‘’sensationaly’’ discovered in 2002 at the foundations of the demolished Atik mosque in Bijeljina. Keywords: stećci-tombstones, Bijeljina, Bosna, Sava, Treaty of Passarowitz, Habsburg Monarchy, Ottoman Empire, Vlachs, Kobaš

U ovom radu bavit ću se pita­njem pozicioniranja muslimanskih rezolu­cija u savremenom kontekstu nenasilnog otpora tokom Holokausta. U studijama genocida pitanje nenasilnog otpora često se koristi kao pozitivan primjer pojedinaca koji su se suprotstavili počiniocima zlo­čina. Fenomen muslimanskih rezolucija se, uz odgovarajući historijski kontekst, može smatrati jednim od najboljih primjera nenasilnog otpora na teritorijama okupi­rane Evrope. Bez želje da se uspostavlja mit o jedinstvenosti, jer postoji bezbroj drugih primjera hrabrosti širom Evrope, ove rezolucije se ipak mogu posmatrati kao zaseban fenomen. Odlikovao ih je or­ganizovaniji kvaziinstitucionalni karak­ter s ciljem ne samo osuđivanja zločina i ograđivanja od njih nego i ukazivanja na stradanja vlastitog naroda. Ujedno, imale su veliki značaj i u poslijeratnom periodu u Jugoslaviji, naročito za pitanje nacionalne afirmacije Muslimana. Uvažavajući značaj ovih rezolucija za šire evropsko pamćenje Holokausta, potrebno ih je učiniti dostup­nim stranoj publici. U vezi s tim, Institut za islamsku tradiciju Bošnjaka, u saradnji s američkim Univerzitetom Shenandoah, pokrenuo je 2020. godine istraživački pro­jekat pripreme publikacije s ciljem popu­lariziranja muslimanskih rezolucija. U ovom radu nastojat ću ponuditi adekvatan odgovor na pitanje gdje smjestiti musli­manske rezolucije u savremenim kontek­stima u odnosu prema stranoj publici.