Visualization of Big Data Text Analytics in Financial Industry: A Case Study of Topic Extraction for Italian Banks

Textual data and analysis can derive new insights and bring valuable business insights. These insights can be further leveraged by making better future business decisions. Sources that are used for text analysis in financial industry vary from internal word documents, email to external sources like social media, websites or open data. The system described in this paper will utilize data from social media (Twitter) and tweets related to Italian banks, in Italian. This system is based on open source tools (R language) and topic extraction model was created to gather valuable information. This paper describes methods used for data ingestion, modelling, visualizations of results and insights. This work is licensed under a&nbsp;Creative Commons Attribution-NonCommercial 4.0 International License.</p

Mineralni i polifenolni profil zelenog, crnog, biljnih i voćnih filter čajeva i njihov antioksidativni kapacitet

The aim of this doctoral dissertation was estimation of the antioxidant activity, polyphenol and mineral composition of black, green, herbal and fruit bagged teas. Heaving in mind the fact that different polyphenol compounds as antioxidants can react in vivo by various mechanisms, for determination of the total antioxidative activity was used several spectrophotometric tests (DPPH, ABTS, FRAP and RP) and electrochemical method - cyclic voltammetry. The antioxidant capacity of the analyzed samples was estimated using the antioxidant potency composite index (ACI). For identification and quantification of individual polyphenolic compounds, HPLC chromatography was used, and multi-element composition of bagged teas was determined by ICP-OES method. In order to differentiation analyzed bagged teas, methods of multivariate statistical analysis (PCA and CA) were used. In relation to the obtained results, analyzed bagged teas could contribute to the daily dietary requirements

Ukrštena rezistentnost ambrozije pelenaste (Ambrosia artemisiifolia L.) na herbicide ALS inhibitore u Srbiji

Ambrozija pelenasta (Ambrosia artemisiifolia L.) predstavlja jednu od najvažnijih invazivnih korovskih vrsta u Srbiji, za čije suzbijanje se u većini ratarskih useva najčešće koriste herbicidi ALS inhibitori. U poslednjih nekoliko godina na području južne i centralne Bačke, ovi herbicidi nisu ispoljili očekivanu efikasnost u suzbijanju ove korovske vrste. Cilj ispitivanja je bio da se ispita postojanje rezistentnosti ovog korova na ALS inhibitore i njena rasprostranjenost u Srbiji. U 2018. i 2019. godine, na prostoru centralne i južne Bačke, sa 36 polja soje, suncokreta, šećerne repe i kukuruza, sakupljeno je seme populacija ambrozije pelenaste u kojima se pretpostavlja da je došlo do razvoja rezistentnosti na herbicide ALS inhibitore. Biotestovi sa ovim populacijama imali su cilj da se proceni rasprostranjenost rezistentnosti i kreiraju mape

Fractional Calculus Model of Electrical Impedance Applied to Human Skin

Fractional calculus is a mathematical approach dealing with derivatives and integrals of arbitrary and complex orders. Therefore, it adds a new dimension to understand and describe basic nature and behavior of complex systems in an improved way. Here we use the fractional calculus for modeling electrical properties of biological systems. We derived a new class of generalized models for electrical impedance and applied them to human skin by experimental data fitting. The primary model introduces new generalizations of: 1) Weyl fractional derivative operator, 2) Cole equation, and 3) Constant Phase Element (CPE). These generalizations were described by the novel equation which presented parameter (beta) related to remnant memory and corrected four essential parameters (R-0, R-infinity, alpha, tau(alpha)). We further generalized single generalized element by introducing specific partial sum of Maclaurin series determined by parameters (beta(*), gamma,delta ...). We defined individual primary model elements and their serial combination models by the appropriate equations and electrical schemes. Cole equation is a special case of our generalized class of models for beta* = gamma = delta = ... = 0. Previous bioimpedance data analyses of living systems using basic Cole and serial Cole models show significant imprecisions. Our new class of models considerably improves the quality of fitting, evaluated by mean square errors, for bioimpedance data obtained from human skin. Our models with new parameters presented in specific partial sum of Maclaurin series also extend representation, understanding and description of complex systems electrical properties in terms of remnant memory effects

Electrical characteristics of female and male human skin

Bioimpedance spectroscopy (BIS) is a popular method for characterizing the electrical properties of biological tissues. In this study, BIS measurement data of female and male human skin were analyzed and compared. The electrical characteristics of tissue were followed according to four-parameters of the Cole-Cole model: low frequency resistance R0; high frequency resistance R∞; relaxation time t and parameter a. Individual electrical characteristics of human skin were determined for 30 women and 30 men. The distribution and one-way analysis of variance (one-way ANOVA) of the Cole-Cole parameters R0, R∞, t, a within the human population indicated their different dependence on gender. Parameter a, which is higher in the female subjects (a =0.83±0.03) than in the male subjects (a=0.7±0.05), is strongly dependent on gender (p=0). Parameter R∞ also significantly depends on gender (p=0.002), while t and R0 seem to be slightly related to gender (p&gt;0.05). [Acknowledgments - This work was supported by the Ministry of Education and Science of the Republic of Serbia (41006).

Prednosti zajedničke primene tembotriona i terbutilazina posle nicanja kukuruza

Zajednička primena dva ili više herbicida različitih mehanizama delovanja je česta praksa, čiji ciljevi su proširenje spektra delovanja, smanjenje troškova i sprečavanje razvoja rezistentnosti korova na određene herbicide. U zavisnosti od mehanizma delovanja, interakcije između herbicida mogu biti sinergističke, antagonističke ili aditivne, u skladu sa tim da li je zajednički efekat na biljke veći, manji ili jednak zbiru efekata herbicida kada se primenjuju sami. Istovremena primena herbicida iz grupe triketona i triazina je korisna zbog sinergističke interakcije kojom se postiže efikasnije suzbijanje korova u odnosu na njihovu pojedinačnu primenu. Sinergistička interakcija u kukuruzu je najčešće korišćena kod zajedničke primene mezotriona (iz grupe triketona) i terbutilazina (grupa triazina), a što je moguće postići i kombinovanjem drugih predstavnika pomenutih grupa herbicida. Cilj istraživanja je bio da se utvrdi koje su mogućnosti zajedničke primene tembotriona i terbutilazina, odnosno eventualne prednosti i nedostaci, u odnosu na pojedinačnu primenu tembotriona i standardnu kombinaciju mezotriona i terbutilazina u kukuruzu

Electrical characteristics of female and male human skin

Bioimpedance spectroscopy (BIS) is a popular method for characterizing the electrical properties of biological tissues. In this study, BIS measurement data of female and male human skin were analyzed and compared. The electrical characteristics of tissue were followed according to four-parameters of the Cole-Cole model: low frequency resistance R0; high frequency resistance R∞; relaxation time t and parameter a. Individual electrical characteristics of human skin were determined for 30 women and 30 men. The distribution and one-way analysis of variance (one-way ANOVA) of the Cole-Cole parameters R0, R∞, t, a within the human population indicated their different dependence on gender. Parameter a, which is higher in the female subjects (a =0.83±0.03) than in the male subjects (a=0.7±0.05), is strongly dependent on gender (p=0). Parameter R∞ also significantly depends on gender (p=0.002), while t and R0 seem to be slightly related to gender (p>0.05)

Methionine versus homocysteine: future directions in cardiovascular research

L-methionine, the principal sulfur-containing amino acid in proteins, has important roles in cell physiology as an antioxidant, and in the breakdown of fats and heavy metals. Methionine is the precursor of homocysteine, and participates in the methylation and transsulfuration pathways. Elevated total plasma homocysteine (hyperhomocysteinemia) is associated with atherosclerosis, thromboembolic disease and cancer. Whether homocysteine per se or a coincident metabolic abnormality (homocysteine-related compounds, thiolactone metabolites) causes vascular disease is still an open question. Animals with genetic hyperhomocysteinemia have so far not displayed atheromatous lesions. However, when methionine-rich diets are used to induce hyperhomocysteinemia, vascular pathology is often observed. Such studies have not distinguished the effects of excess dietary methionine from those of hyperhomocysteinemia. It is known that high methionine diet, not only red meat for example lamb, beef, pork but also chicken meat can induce cardiovascular dysfunction but the mechanisms are unclear. It has been hypothesized that a diet rich in methionine can malfunction the cardiovascular system in three ways: (1) by augmenting oxidative stress, (2) by inflammatory manifestations, and (3) by matrix/vascular remodeling. However, some evidence indicates that an excess of methionine can be harmful for other systems, and can increase the risk of developing type-2 diabetes, certain types of cancer, brain alterations such as schizophrenia, and memory impairment. However this is still controversial because previous studies suggesting the use of L-methionine as a treatment for depression and other diseases indicate that it might also improve memory (role in brain function). Thus, the direction of our research is to further elucidate mechanisms of cardiovascular and neural effects of homocysteine vs. methionine overload.HISPA 2017 : HISPA TRILATERAL "Cardiovascular challenges on Balkan roads crossing" : Abstracts : September 15-17, 2017, Zlatibor

Modeling of bioimpedance for human skin based on fractional distributed-order modified cole model

Eksperimentalni podaci otpornosti i računa necelobrojnog reda koriste se za modeliranje bioimpedansnih osobina ljudske kože. Uveli smo i predložili modifikovani Kole model koristeći pri tom operator distribuiranog necelog reda koji je zasnovan na Caputo-Weyl-ovim izvodima necelog reda.Naš predloženi model predstavlja izmenjen jedno-disperzijski Kole model, jer uvodi nove parametre k i σ u jedno-disperzijskoj Kole impedansnoj jednačini. Ovi parametri karakterišu širinu intervala oko frakcionog indeksa α i oni su važni za precizniji opis bioimpedansnih osobina ljudske kože. Predloženi modifikovani Kole model mnogo bolje daje fitovanje date eksperimentalne krive u datom frekventnom opsegu u poređenju sa sa postojećim Kole modelima. Fitovanje je urađeno primenom Levenberg-Marquardt algoritma nelinearnih najmanjih kvadrata.Electrical impedance measurement data and fractional calculus have been utilized for modeling bioimpedance properties of human skin. We introduced and proposed revisited Cole model using modified distributed order operator based on the Caputo-Weyl fractional derivatives. Our proposed model presents essentially modified single-dispersion Cole model, since it introduces a new parameters k and σ in single-dispersion Cole impedance equation. These parameters characterize the width of interval around fractional index α and they are important for more accurate describing bioimpedance properties of human skin. The impedance spectrum was measured in a finite frequency range up to 100 kHz. Our proposed modified Cole model fits much better to experimental curve in a given frequency range compared to existing Cole models. The fitting is done using the Levenberg-Marquardt nonlinear least squares

Modeling of bioimpedance for human skin based on fractional distributed-order modified cole model

Eksperimentalni podaci otpornosti i računa necelobrojnog reda koriste se za modeliranje bioimpedansnih osobina ljudske kože. Uveli smo i predložili modifikovani Kole model koristeći pri tom operator distribuiranog necelog reda koji je zasnovan na Caputo-Weyl-ovim izvodima necelog reda.Naš predloženi model predstavlja izmenjen jedno-disperzijski Kole model, jer uvodi nove parametre k i σ u jedno-disperzijskoj Kole impedansnoj jednačini. Ovi parametri karakterišu širinu intervala oko frakcionog indeksa α i oni su važni za precizniji opis bioimpedansnih osobina ljudske kože. Predloženi modifikovani Kole model mnogo bolje daje fitovanje date eksperimentalne krive u datom frekventnom opsegu u poređenju sa sa postojećim Kole modelima. Fitovanje je urađeno primenom Levenberg-Marquardt algoritma nelinearnih najmanjih kvadrata.Electrical impedance measurement data and fractional calculus have been utilized for modeling bioimpedance properties of human skin. We introduced and proposed revisited Cole model using modified distributed order operator based on the Caputo-Weyl fractional derivatives. Our proposed model presents essentially modified single-dispersion Cole model, since it introduces a new parameters k and σ in single-dispersion Cole impedance equation. These parameters characterize the width of interval around fractional index α and they are important for more accurate describing bioimpedance properties of human skin. The impedance spectrum was measured in a finite frequency range up to 100 kHz. Our proposed modified Cole model fits much better to experimental curve in a given frequency range compared to existing Cole models. The fitting is done using the Levenberg-Marquardt nonlinear least squares