ABSTRACT: This work aims to report our experience with Oral History, developed in the Special Topic Course in History Teaching of the Master's program Prof.Historia at UFS. This experience had as its culminating point a research practiced in the Florestan Fernandes Settlement, located in Caninde de Sao Francisco-SE, for that purpose we made use of the Oral History Methodology, which offers innumerable possibilities, among them the one of giving voice to “little men”, so that from their experiences and worldviews, we can have an unofficial understanding of the most varied events. It is worth highlighting the importance of our interviewee, Mrs. Maria de Lourdes, whose rich testimony contributed a lot to the elucidation of different issues. It is worth noting that the article had as its guiding concepts the aforementioned Oral History, as well as Memory, Social Identity and Places of Memory. KEYWORDS: Memory and Identity. Interviews. Settlement.

The use of computers with outstanding performance has become a real necessity in order to achieve greater efficiency and sustainability for the accomplishment of various tasks. Therefore, with the development of information technology and increasing dynamism in the business environment, it is expected that these computers will be more intensively deployed. In this paper, research was conducted in Danube region countries: Austria, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Germany, Hungary, Moldova, Montenegro, Romania, Serbia, Slovakia, Slovenia, and Ukraine. The aim of the research was to determine what criteria are most significant for the introduction of high-performance computing and the real situation in each of the countries. In addition, the aim was to establish the infrastructure needed to implement such a system. In order to determine the partial significance of each criterion and thus the possibility of implementing high-performance computing, a multi-criteria model in a fuzzy environment was applied. The weights of criteria and their rankings were performed using the Fuzzy PIvot Pairwise RElative Criteria Importance Assessment—fuzzy PIPRECIA method. The results indicate different values depend on decision-makers (DMs) in the countries. Spearman’s and Pearson’s correlation coefficients were calculated to verify the results obtained.

The studies on the relationship between probiotics and prebiotics as well as probiotics and antioxidants have gained significant increase in popularity over the past decade. However, exposure to antibiotics can result in disrupting the human microbiome, causing several related diseases. Additionally, probiotics can lose some of their beneficial effects when in contact with stomach acid which has a pH between 2 and 3. The purpose of this study was to examine the effects of prebiotic fibres and antioxidants and B complex vitamins on the survival of probiotics. When combined with those, a sufficient amount of probiotics survives and carries out their beneficial functions. This study points out the importance of mentioned compounds in maintaining a healthy organism as well as their role in preserving the life of probiotics in our gut.

Drones-aided ubiquitous applications play more and more important roles in our daily life. Accurate recognition of drones is required in aviation management due to their potential risks and even disasters.Radio frequency (RF) fingerprinting-based recognition technology based on deep learning is considered as one of the effective approaches to extract hidden abstract features from RF data of drones. Existing deep learning-based methods are either a high computational burden or low accuracy.In this paper, we propose a deep complex-valued convolutional neural network (DC-CNN) method based on RF fingerprinting for recognizing different drones.Compared with existing recognition methods, the DC-CNN method has the advantages of high recognition accuracy, fast running time and small network complexity.Nine algorithm models and two datasets are used to represent the superior performance of our system.Experimental results show that our proposed DC-CNN can achieve recognition accuracy of 99.5\% and 74.1\% respectively on 4 and 8 classes of RF drone datasets.

Herein, a conductivity method was engaged to explore the effects of a fluoroquinolone drug, namely ciprofloxacin hydrochloride (CFH)/CFH + polyols (organic compounds with multiple hydroxyl groups (glucose and fructose)), on the aggregation phenomenon of sodium dodecyl sulfate (SDS) at different temperatures (298.15–318.15 K) while maintaining a gap of 5 K. In this study, the critical micelle concentration (cmc) of the SDS/SDS + CFH mixture in water and polyols media was determined from plots of the specific conductivity versus the concentration of SDS to gain knowledge of the effects of CFH/CFH + polyols on the micelle formation behavior of SDS. The cmc value of the surfactant decreases in the presence of CFH in an aqueous medium; thus, CFH favors the micellization of SDS. The cmc values of SDS and the SDS + CFH mixture were enhanced in polyols media. The cmc values of SDS/SDS + CFH show a U-shaped behavior with temperature. The counterion dissociation (α) of the pure surfactant is higher in the presence of the drug and is further enhanced through an increase in the CFH concentration in water/polyols media. Different thermodynamic parameters, such as the Gibbs free energy of micellization , standard enthalpy , entropy , different transfer energies and enthalpy–entropy compensation parameters of micellization were determined and illustrated in detail to compare these parameters between the pure SDS and SDS + CFH mixture in polyols media. The negative values of for the SDS/SDS + CFH mixture in all cases indicate spontaneous micelle formation. The and values indicate the presence of both hydrophobic and electrostatic interactions amongst the studied components.

BACKGROUND Coronary collateral circulation exerts protective effects on myocardial ischaemia due to coronary artery disease and can be promoted by exercise with heparin co-administration. Whether this arteriogenetic effect is accompanied by functional improvement of left ventricle during stress and lessening of angina symptoms remains unknown. AIMS To evaluate the anti-ischaemic efficacy of heparin plus exercise in coronary artery disease. METHODS In a prospective, single-centre, randomized, double-blind study we recruited 32 'no-option' patients (27 males; mean age 61 ± 8 years) with stable angina, exercise-induced ischaemia and coronary artery disease not suitable for revascularization. All underwent a two-week cycle of exercise (two exercise sessions per day, five days per week) and were randomized (n = 16 per group) to intravenous placebo (0.9% saline) versus unfractionated heparin (5.000 IU intravenously), 10 min prior to exercise. We assessed Canadian Cardiovascular Society angina class, stress electrocardiogram and echo parameters (wall motion score index) and computed tomography angiography for collaterals. RESULTS After two-week cycle, Canadian Cardiovascular Society class statistically decreased in both groups (heparin plus exercise group: 2.6 ± 0.7 to 1.9 ± 0.7, p < 0.001, exercise group: 2.4 ± 0.7 to 2.1 ± 0.9, p = 0.046). Only the heparin plus exercise group improved time-to-ST segment depression (before 270, 228-327 s vs. after 339, 280-360 s, p = 0.012) and wall motion score index (before 1.38 ± 0.25 vs. after 1.28 ± 0.18, p = 0.005). By multi-slice computed tomography angiography, collaterals improved in 12/15 (80%) in the heparin plus exercise group versus 2/16 (12.5%) in the exercise group (p < 0.001). CONCLUSION A two-week, 10-test cycle of heparin plus exercise is better than exercise in improving angina class, myocardial ischaemia and collaterals by computed tomography angiography.

U okviru projekta utvrđivanja aroma profila različitih hrvatskih vrsta janjetine čiji je osnovni cilj bio ponuditi jednostavnu i pouzdanu analitičku metodu kojom bi se mogla potvrditi njihova autentičnost povezujući ih sa zemljopisnim područjem uzgoja, izvršena je analiza hlapivih spojeve arome kupreške janjetine uzgojene na Kupreškoj visoravni (BiH) na oko 1200 m n.v. Znatna teritorijalna odvojenost (horizontalna i vertikalna) Kupreške visoravni od hrvatskih područja na kojima je istraživanje organizirano (Lika, Dalmatinska zagora, otoci Pag i Cres) te razlike u njihovim prirodnim obilježjima doprinos su sigurnijem donošenju zaključaka o mogućim biomarkerima janjećeg mesa koji bi se s obzirom na florni sastav mogli povezati s određenim zemljopisnim područjem uzgoja. Analizom hlapivih spojeva toplinski obrađene kupreške janjetine na GC-MS, metodom mikroekstrakcije na čvrstoj fazi (SPME) te određeni metodom plinske kromatografije s masenom spektrofotometrijom (GC-MS), izolirano je ukupno 66 spojeva, od čega 14 aldehida (61,55 % ukupne površine pikova), 10 alkohola (7,78 %),12 ketona (12,11 %), 8 alifatskih ugljikovodika (1,23 %), 7 aromatskih spojeva (9,63 %), 3 heterociklička spoja (0,95 %), 1 furan (1,34 %), 2 kiseline i 3 estera (3,75 %), 4 terpena (0,94 %) te 3 sumporna spoja (0,73 %). U odnosu na dalmatinsku, pašku, ličku i cresku janjetinu, aroma kupreške janjetine sadrži 3 hlapiva spoja (2 ketona i 1 ester) koja nisu utvrđena u navedenim vrstama janjetine. Nadalje, aroma kupreške janjetine sadrži znatno više C-7 aldehida (16,24 %), ketona 2,3-oktadienona i 2-oktanona (9,96 %) te dugolančanih alkana (0,71 %) koji se u literaturi navode kao pašni markeri, ali i znatno manji broj i udio terpena (0,94 %) koji se u literaturi spominju kao mogući pouzdani biomarkeri zemljopisnog područja uzgoja. S obzirom da su terpeni isključivo metaboliti biljaka (biljke dvosupnice ih sadrže znatno više nego jednosupnice) koji se uglavnom izravno iz hrane ugrađuju u životinjska tkiva, terpenski profil janjetine može ukazivati na područje uzgoja janjadi (efekt teritorija). Sudeći prema aroma profilu (markerima paše), a osobito terpenskom profilu kupreške janjetine, kupreški pašnjaci i livade obiluju bogatom biljnom masom u kojoj dominiraju trave, dok su biljke dvosupnice (bogate aromatskim spojevima) manje zastupljene. Za pouzdanije rezultate potrebno je provesti dodatna istraživanja botaničkog i kemijskog sastava flore kupreških pašnjaka i livada, čije će se rezultati povezati s odgovarajućim spojevima arome janjećeg mesa.

This paper presents an enhanced peak cancellation method with simplified in-band distortion compensation for massive multi-input multi-output (mMIMO) orthogonal frequency division multiplexing (OFDM). The method compensates an in-band distortion due to peak cancellation by utilizing extra transmit antennas, where a compensation signal is designed and transmitted using extra antenna elements so that in-band distortion is canceled at the receiver end. Consequently, deep peak cancellation is possible without degrading bit error rate performance. The proposed method is further extended to non-linear precoded mMIMO-OFDM systems, where the perturbation vector cancellation signal is superimposed on the compensation signal so that the received signal is demodulated without non-linear processing to remove the perturbation vector. Thus, the proposed method does not require the iterative calculation to compensate for an in-band distortion. Our results show the effectiveness of the proposed method in terms of peak-to-average power ratio (PAPR) characteristics, signal to noise and distortion power ratio (SDNR), bit error rate (BER), and throughput in comparison with the state-of-the-art.

Cathodic protection is defined as a method for slowing down or complete elimination of corrosion processes on underground or underwater, insulated or uninsulated metal structures. Protection by cathodic protection system is achieved by polarizing protected object to more negative value, with respect to its equilibrium potential. Design of the cathodic protection system implies determination of the electric potential and current density on the electrode surfaces after installation of the cathodic protection system. Most efficient way for determination of the electric potential and current density in the cathodic protection system is by applying numerical techniques. When modeling cathodic protection systems by numerical techniques, electrochemical reactions that occur on electrode surfaces are taken into account by polarization characteristics. Because of nature of the electrochemical reactions, polarization characteristics are nonlinear and under certain conditions can be time – varying (dynamic nonlinear polarization characteristics). This paper deals with numerical modeling of the cathodic protection system with dynamic nonlinear polarization characteristics. Numerical model presented in this paper is divided in the two parts. First part, which is based on the direct boundary element method, is used for the calculation of the distribution of electric potential and current density on the electrode surfaces in the spatial domain. Second part of the model is based on the finite difference time domain method and is used for the calculation of the electric potential and current density change over time. The use of presented numerical model is demonstrated on two simple geometrically examples.