bluuebunny/crossref_metadata_2025 huggingface dataset:
СHLOROPHENOLS REMOVAL FROM SOLUTION USING ADSORPTION AND OXIDATION IN PRESENCE OF ACTIVATED CARBON FIBER
Authors: Artemyanov Andrey P. , Zemskova Larisa A.
Published: July 2019

Adsorption and catalytic decomposition of 3- and 4-chlorophenols in the presence of hydrogen peroxide were studied for estimation of efficiency of the adsorption and catalytic methods for purification of solutions from chlorophenols related to special group of the priority toxic water pollutants. Activated carbon fiber and fiber modified with iron/iron oxide having highly developed surface and porous structure were used as the adsorbents. It was shown that adsorption of chlorophenols on the initial carbon fiber was higher as compared to the modified one and equaled to 309 mg/g for 3-chlorophenol and 301 mg/g for 4-chlorophenol. The sorption isotherm of 4-chlorophenol on the initial fiber is described by Langmuir equation with constant equals to 0.065 L/mg, while for composite sorbent constant equals to 0.037 L/mg. It was discovered that removal of chlorophenols from aqueous solutions in the processes of catalytic oxidation in the presence of a heterogeneous catalyst was more efficient than that in the adsorption process. Experimental data have been obtained on the dependence of the concentration of 3-and 4-chlorophenols on the time of destruction at specified pH values and the ratios of the pollutant and hydrogen peroxide. With an increase in the 4-chlorophenol: H2O2 ratio from 1:1 to 1:6, the degree of chlorophenol destruction increases from 75% to 88% (pH 3); when the pH changes from 1 to 9, the greatest degree of destruction is 70% (3-CP) and 87% (4-CP) was achieved at pH 3 (chlorophenol: H2O2 1:4). It was shown that in the system chlorophenol / H2O2 / catalyst there are optimal parameters (pH is 3 and chlorophenol : H2O2 ratio is 1:6), which provide the most complete removal of chlorophenol from solution. The results of chromatography-mass spectrometry analysis show that during contact with the modified fiber, the content of 4-CP decreases dramatically and degradation products are formed (for example, maleic acid), which is consistent with the known schemes for the oxidative destruction of chlorophenols.
SYNTHESIS AND STRUCTURE OF TRIPHENYLBUT-2-ENYL- AND TRIPHENYLMETOXYMETHYLPHOSPHONIUM HEXACHLOROZIRCONATES
Authors: Sharutin Vladimir V. , Sharutina Olga K. , Tarasova Natalya M. , Lobanova Evgeniya V. , Andreev Pavel V.
Published: July 2019

Triphenylbut-2-enyl- (1a) and triphenylmetoxymethylphosphonium (1b) hexachlorozirconates have been synthesized by the reactions of zirconium tetrachloride with the triphenylalkylphosphonium chlorides in acetonitrile for the first time and characterized by the IR, NMR spectroscopy and X-ray analysis. The most intensive bands in IR spectra correspond to the valence vibrations of the CAr-H and the СAr-СAr bonds in the triphenylalkylphosphonium cations. The splitting of carbon atoms signals is observed due to the presence of  13C – 31P coupling. SSCC for carbon atoms directly connected with phosphorus are about 48–85 Hz. According to the X-Ray data, compound 1a crystallizes in the monoclinic crystal lattice (the P21/c space symmetry group). Hexachlorozirconate 1b forms the triclinic crystals belong to the P-1 space symmetry group. Crystals of compound 1a is characterized by the less dense molecular packing in the crystal lattice in comparison with compound 1b. Calculated densities for the structures 1a,b are 1.355 g/cm3 and 1.466 g/сm3, respectively. Structural organization of the complexes in crystals is caused by the formation of hydrogen bonds between chlorine atoms of the anion and hydrogens of phenyl and alkyl groups of the cations. The phosphorus atoms in the triphenylalkylphosphonium cations have distorted tetrahedral coordination (CPC 107.01(4)°-114.10(6)°  for 1а, 107.38(9)°-112.06(7)° for 1b, the P-С bonds are 1.790(14)-1.865(14) Å for 1а, 1.7838(12)-1.8293(18) Å for 1b). In centrosymmetric octahedral anions [ZrCl6]2− (trans-ClZrCl 180°) the Zr-Cl distances are 2.4654(15)-2.4952(17) Å for 1а and 2.4641(14)-2.4711(12) Å for 1b.
PROPERTIES OF DYNAMIC THERMOPLASTIC ELASTOMERS BASED ON POLYPROPYLENE AND BUTADIEN-NITRIL RUBBER
Authors: Kakhramanov Najaf T. , Mammadli Ulviya M. , Arzumanova Nushaba B. , Huseynova Zulfira N. , Dadasheva Esmira V. , Mammadov Bakhtiyar A.
Published: July 2019

The study results of the influence of butadiene-nitrile rubber different grades concentration, cross-linking agent type and content on the physico-mechanical and thermo-deformation properties of polymer compositions based on polypropylene are presented. Mixing of the components was carried out on hot rollers in the melt mode at 170 °C. A preliminary study of rubber concentration affect on the properties of compositions based on polypropylene showed that the introduction of an elastomeric component leads to a regular decrease in the strength and elongation at break of the compositions. The results of investigation of the thermo-deformation properties of polymer compositions showed that at a rubber concentration of 30wt%, and higher on thermomechanical curves, the region of the high-elastic state characteristic of rubbers is noticeably distinguished. Taking into account that the rubber materials are obtained during the process of their vulcanization, it seemed interesting to crosslink materials with two types of vulcanizing agents – dicumyl peroxide and sulphur for obtaining comparable results. The concentration of dicumyl peroxide was varied between 0.5 - 2.0 wt%. It was found that the use of dicumyl peroxide in an amount of 1.0-2.0 wt% is accompanied by intense occurrence of crosslinking with the formation of an irreversible highly crosslinked structure in the polymer composition. Based on the evaluation of the melt flow index of the vulcanized compositions, it was found that at the concentration of dicumyl peroxide in an amount of 0.5 wt% they still retain the ability to flow. At concentrations above 0.5 wt% of dicumyl peroxide the polymer compositions completely lose the fluidity of the melt. It was found that with an increase in the sulphur concentration from 3.0 to 10 wt% the decrease in the melt flow index from 2.76 to 0.616 g/10 min is observed. It was found that the crosslinking process predominantly proceeds through double bonds of butadiene-nitrile rubber, thereby facilitating the production of dynamically vulcanized polymer materials with a unique combination of structure and properties. This was confirmed by the results of a study of the thermo-deformation characteristics of compositions, according to which a transition from the region of a high-elastic state to viscous-flow state is observed in all samples subjected to sulfur vulcanization. The results of the study make it possible to state that dynamic thermoplastic elastomers can be obtained only if the ratio of the components used in the polymer composition is correctly selected.
STUDY OF KINETIC AND STRUCTURAL CHARACTERISTICS OF MEMBRANES IN PURIFICATION PROCESS OF COPPER-CONTAINING SOLUTIONS BY ELECTRODIALYSIS
Authors: Shestakov Konstantin V. , Lazarev Sergey I. , Polyanskiy Konstantin K.
Published: July 2019

This paper presents the analyzed results of the study of structural and kinetic characteristics of ion-exchange membranes MA-40, MK-40, PC Acid 60 and CM(H) (RALEX®) during separation and concentration of copper-containing solutions in the electrodialysis process. In particular, the sizes of amorphous and crystalline regions of the membrane material structure and the degree of crystallinity were determined, the retention factor of cation Cu2+ and anions NO3- and SO42- were calculated. It was found that for mA-40 and MK-40 membranes the structure of the membrane material changes during water saturation, what in turn can affect the kinetics of mass transfer through the membrane. In addition a low sensitivity of membrane material to mechanical and thermal loads under cyclic operating conditions is detected. This is confirmed by the coincidence of diffraction angles at which peaks of dry and water-saturated samples of membranes are observed, and by a non-significant change in the x-ray degree of crystallinity of the membrane material within 5-7% in the smaller side for water-saturated samples. The data, which were obtained during this work, indicate a relatively good cleaning of copper-containing solutions by electrodialysis from extraneous ions (NO3- and SO42-) at high values of Cu2+ cations concentration. In the initial section, slightly less than 90% of Cu2+ cations are retained, while NO3- and SO42- anions remain significantly less – about 16.7% and 25.7%, respectively. It should be noted that the most optimal parameters of electrodialysis are required for maximizing the efficiency of concentration.
INVESTIGATION OF STRESS-STRAIN STATE OF CYLINDRICAL BODY OF MODIFIED HDPE
Authors: Litvinov Stepan V. , Lesniak Lyubov I. , Yazyev Serdar B. , Zotov Ivan M.
Published: July 2019

The change in the stress-strain state over time in structures and their elements from polymeric materials can be quite substantial. This is due to the pronounced rheology of the polymers. One of the most accurate laws of stress-strain bond is generalized nonlinear Maxwell-Gurevich equation, which takes into account three rheological parameters: the modulus of elasticity, the velocity modulus and the coefficient of initial relaxation viscosity. A significant influence on the physico-mechanical parameters of the polymer is also exerted by various factors: the presence of a temperature field and ionizing radiation, the presence of additives in the polymer and so on. The paper presents the results of mathematical modeling of a disc made of high-density polyethylene (HDPE) in an axisymmetric setting under the influence of mechanical axial pressure. This model is chosen because of the most frequent use of HDPE irradiated and with additives in medicine, including for the manufacture of orthopedic prostheses. Different compositions of HDPE are considered: under the influence of ionizing radiation, with additives of hydroxyapatite and with their combined effect. All physico-mechanical parameters of HDPE (dose of ionizing radiation and the fraction of hydroxyapatite injected) are described by mathematical expressions obtained in the scientific school of Professor B.M. Yazyev on the basis of an analysis of the corresponding polymer relaxation curves. The results of the solution of the problem have shown that the basic stresses (radial, circumferential and axial) vary in the course of time in different ways. The growth of the value of the primary basic stresses can be 2-2.5 times. If the analysis is carried out on the main stresses, then their value increases by approximately 1.5 times. Also, the change in the principal stresses is observed even when it is not observed for the basic stresses.
SEMI-EMPIRICAL MODEL FOR PREDICTING PHENOL CARBOXYLIC ACIDS ANTIRADICAL ACTIVITY
Authors: Belaya Natalia I. , Belyi Alexander V.
Published: July 2019

Using the spectral method, the rate constants of natural phenolcarboxylic acids reaction with the radical 2,2'-diphenyl-1-picrylhydrazyl in benzene at a temperature of 293±2 K were determined. It is established that the reaction corresponds to the second-order kinetic equation and proceeds by the mechanism of the hydrogen atom transfer. This confirmed by the presence of the deuterium isotope effect. The parameter, affecting the proceed of this mechanism in a non-polar medium, is the energy of the homolytic rupture of the weakest phenolic O–H bond in the phenolcarboxylic acid molecule, calculated using the quantum-chemical methods. Changes in the strength of phenolic O–H bonds in an acid molecule lead to corresponding changes in their reactivity with respect to the hydrazyl radical. It is seen that the compounds with low bond strengths of functional groups – 3 pyrogallolcarboxylic and gallic acids, methyl- and ethyl- gallate – showed the most antiradical activity. According to the calculated and experimental data, a semiempirical linear single-factor equation is proposed. This equation describes the relationship between the antiradical activity of phenolic acids and the descriptor of their structure and allows to predict the reactivity of the antioxidant in lipid-like media. The applicability of the proposed model was proved by studying the control group of hydroxyacetophenones which belong to plant phenol compounds. According to the forecast, 3,4- and 2,5-hydroxyacetophenones can be recommended as potential effective antioxidants in non-polar environments. The unit relative deviations of the predicted rate constants from their experimental values vary from 2 to 9% with an average approximation error equals to 7.9%, which indicates a good selection of the linear model.
PROTECTIVE PROPERTIES OF SOME THIADIAZOLE DERIVATIVES IN SULFURIC ACID SOLUTIONS
Authors: Shein Anatoliy B. , Plotnikova Mariya D. , Rubtsov Alexander E.
Published: July 2019

The work presents the results of the study of some thiadiazole derivatives as corrosion inhibitors for mild steel in 5-20% H2SO4. Gravimetric tests and electrochemical studies were performed on low-carbon steel St3 at ambient temperature. The exposure time of the samples was 24 h. Polarization curves were obtained by potentiodynamic method (v = 1 mV/s) in a three-electrode cell, using the SOLARTRON 1280 C electrochemical measuring complex. The following thiadiazole derivatives were studied: (E)-N,N-dimethyl-4-{[(5-phenyl-1,3,4-thiadiazol-2-yl)imino]methyl}aniline, (E)-5-{[4-(dimethylamino)benzylidene]amino}-1,3,4-thiadiazol-2-thiol, (E)-4-{[(5-(furan-2-yl)-1,3,4-thiadiazol-2-yl)imino]methyl}-N,N-dimethylaniline, N-(1,3,4-thiadiazol-2-yl)acetamide. It was established that the studied compounds at a concentration of 0.1 – 0.2 g/l show a good protective effect. The best result is given by (E)-5-{[4- (dimethylamino)benzylidene]amino}-1,3,4-thiadiazol-2-thiol with a protective effect  Z more than 90%. The introduction of the benzene ring and the furan fragment into the molecules of the compounds under study leads to a decrease in their protective action as compared with the thiol group. With the help of electrochemical studies it was shown that the compounds studied are inhibitors of a mixed (cathodic-anodic) type, but to a greater extent they reduced the rate of the cathodic process. The results of the work indicate the promise of searching for potential acid corrosion inhibitors in a series of thiadiazole derivatives and the development of inhibiting compositions based on them.
SOLUTION PLASMA PROCESSING OF NATURAL POLYMER-BASED MATERIALS
Authors: Choukourov Andrei
Published: July 2019

Non-equilibrium low-temperature atmospheric pressure plasma is a highly reactive medium that allows for the ecofriendly modification of nature-derived materials. This work reviews the field of liquid phase plasma modification of polymer-based materials derived from natural sources. Types of solution plasma systems are considered with respect to the efficiency of the generation of active species, their transport to and interaction with macromolecules. Tunable modification of plants (birch, willow, bamboo and vine shoots; barley, rice and rapeseed straw; perennial grasses), algae, plant-derived by-products and wastes (sawdust, bast fibers, nutshells, seeds, peels, press-cake and pomace), plant-derived polymers (cellulose, hemicellulose, lignin, starch, sodium alginate) and animal-derived polymer-based materials (chitosan, collagen, gelatin) by solution plasma treatment is compared to conventional wet chemistry methods. Synthesis of nano-biocomposites with advanced functionalities is also considered.

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SYNTHESIS AND PROPERTIES OF POLYETHYLENE-p-TRIPHENYLBORON ESTER
Authors: Lenskiy Maxim A. , Korabel'nikov Dmitriy V. , Ozhogin Andrei V. , Novitskiy Alexei N. , Shul'ts Elvira E.
Published: July 2019

Triphenyl ester of boric acid was obtained by esterification of boric acid and phenol in o-xylene with water azeotropic distillation, then it was purified by distillation in vacuo. This substance was used as a model compound for the development of a synthesis method for heat-resistant polymers based on polymethylene esters of phenols and boric acid. Reaction of triphenyl ester of boric acid with 1,3,5-trioxane (paraformaldehyde) gave a new boron-containing oligomer – polymethylene-p-triphenyl ester of boric acid. This oligomer was prepared both in the presence of a solvent and without a solvent in the melt of triphenyl ester of boric acid, since at a temperature of 101 °C it completely passes into a liquid state. The polycondensation reaction was carried out in both cases in an acidic medium. The advantage of the second method is obvious, since for the beginning of the polycondensation reaction, three times less catalyst was required than in the reaction using a solvent. The structure of the synthesized oligomer was confirmed by elemental analysis, IR and 1H, 11B NMR spectroscopy. The modification reactions of polymethylene-p-triphenyl ester of boric acid with sulfur curing system, epoxy resin and urotropine were studied. In the IR spectra of modified materials, bands in the aromatic region, in particular those characteristic of disubstituted benzene, are observed to change bands characteristic of tri- and tetrasubstituted benzenes. Thus, the curing of polymethylene-p-triphenyl ester of boric acid occurs in the o-position of the phenyl ring to form three-dimensional structures. The noted curing reactions allow using polymethylene-p-triphenyl boronic acid ester as an independent thermally stable binder and as additives to composite materials.
Les représentations de Jean le Sot dans le contexte francophone
Authors: Rabalais Nathan
Published: July 2019

Cette étude présente une analyse des représentations du personnage de Jean le Sot dans le contexte francophone, notamment en Louisiane et dans le Centre-Ouest de la France. Ce personnage est très répandu dans le folklore francophone et plusieurs variations du nom se retrouvent en France, aux Antilles, au Canada et en Louisiane. Dans le contexte louisianais, la représentation de Jean le Sot est presque complètement limitée à l’idiot par excellence. Ces contes prennent souvent la forme d’un cycle de petits scénarios enchainés, sans ordre déterminé. On trouve un répertoire similaire dans la tradition orale en France, mais il existe également d’autres types attribués à Jean le Sot où le protagoniste est représenté comme un héros simplet. Cette interprétation positive du personnage se trouve absente du folklore louisianais. À partir des modèles théoriques tels que les motifèmes d’Alan Dundes et le détrônement carnavalesque de Bakhtine, cette étude vise à comprendre les facteurs socioculturels qui auraient pu influencer le plan moral de ces contes oraux.
La chanson de tradition orale ou le dynamisme de la marge en Amérique française
Authors: Pichette Jean-Pierre
Published: July 2019

À partir de travaux antérieurs consacrés au phénomène de la diffusion du patrimoine oral des Français d’Amérique, envisagé sous l’angle du transfert des traditions européennes du conte, de la chanson, des jurons et des rituels au sein des groupes minoritaires, cette communication veut proposer les éléments d’un modèle interprétatif qui saurait illustrer l’amplitude et rendre compte des dynamiques en présence. Le « principe du limaçon » pourrait apporter un éclairage original et significatif sur ces questions en exposant les rapports entre centre et périphérie, les possibles croisements ou l’origine plurielle des traditions ; il permettrait ainsi de cerner les facteurs du maintien ou de l’érosion des traditions en expliquant pourquoi les marges retiennent mieux et plus longtemps les messages transmis qui s’érodent au centre.
Rediseño web con prototipos gráficos
Authors: Serrano Carpinell Alfons
Published: July 2019

Después de una primera PAC donde aprendimos la idea principal de lo que hace que una interfaz sea intuitiva, clara y sencilla; se nos plantea el trabajo de crear diferentes prototipos gráficos de la web Revolutum (a partir del rediseño de wireframes realizados por otros estudiantes en la asignatura Arquitectura de la información).
Proceso de creación de un folleto para un ciclo de cine mudo
Authors: Estrada Laura
Published: July 2019

La PAC 3 "Composición gráfica avanzada-Percepción visual, aplicación práctica" consistía en diseñar un folleto para una serie de proyecciones de películas de cine mudo. Se proporcionaban todos los textos y, además, imágenes de las películas, de las que había que incluir, como mínimo, una por película. El folleto tenía que ser apto para la visualización digital y también para poder ser impreso.
Sequences and antisequences in hypertensive patients under therapyPlatform
Authors: Tomić Nikolina , Marković Gorana , Škorić Tamara , Milovanović Branislav
Published: July 2019

Baroreceptor reflex (baroreflex, BRR) is a domineering physiological regulator considering the systolic blood pressure (SBP) and heart rate (HR). It maintains the negative feedback equilibrium: if the blood pressure increase, heart rate decreases and vice versa. The aim of this study is to compare the number of baroreflex sequences in hypertensive patients before and after the drug administration, and to oppose the assumptions about their origin. Other methods that evaluate the mutual connection between the SBP and HR time series are investigated as well, such as cross-entropy, copula parameter, and probability integral transformed entropy. Surrogate data were used as a control.
Towards Context-Aware Smart Healthcare Platform
Authors: Avdić Aldina , Kajan Ejub , Janković Dragan , Avdić Dženan
Published: July 2019

This paper deals with the context-aware smart healthcare platform, based on IoT and citizen sensing. The proposed platform provides support to smart cities' citizens in the form of air quality visualization in their surroundings and by appropriate notifications in case of dangerous pollutants level is sensed. It also provides medical assistance based on “help needed” function, and where available, on the medical record of a patient that uses the platform services. The platform is interactive, so the information sent by the users and the requests for help will be processed. Platform development is based on a special kind of social machine that is capable to capture the city’s sensors data, analyze these data and to interact with appropriate business processes. On return, that interaction results with several goals achieved with the project. Presented dashboard visualization allows decision makers, e.g. medical staff, to take proper actions on time and on-the-fly. On the other side, citizens that suffer from a variety of disease problems are able to report an air pollution incident, and ask for help, if they felt worse. The platform itself has a wider usability value and may be deployed to other smart services in a city, e.g. waste management, smart transportation, energy savings, etc. It is also scalable and open for a variety of sensor devices ranges from smartphones, wearables, and other IoT that resides in a smart city, and for different forms of crowdsensing methods. Finally, concluding remarks emphasize the future research directions.
FINANCIAL LITERACY AND CONDITIONS FOR ITS IMPROVEMENT
Authors: Plakalović Novo , Mekinjić Boško , Merko Flora , Lika Daniela
Published: July 2019

In this paper we explain the notion of financial literacy and its importance for citizens,financial institutions and society as a whole. Low level of financial literacy andinsufficiently organized institutional framework can create many problems forindividuals and financial institutions as a whole. In Bosnia and Herzegovina, a very smallnumber of people are financially literate. There is no strategy for raising the level offinancial literacy. Bosnia and Herzegovina is a country that, in relation to itssurroundings, at least strives to raise the level of financial awareness and literacy ofcitizens. If it is not possible to adopt a national strategy for raising the level of financialliteracy in B&H, it would be necessary to use the existing institutional capacity toincrease the level of literacy of all structures and groups of the population.
ANALIZA EFIKASNOSTI TRGOVINSKIH PREDUZEĆA U SRBIJI
Authors: Lukić Radojko
Published: July 2019

Vrlo je aktuelna i kontinuirano se istražuje problematika efikasnosti i totalne faktorske produktivnost u svimprivrednim sektorima, što znači i u trgovinskom. Pri tom se u novije vreme sve više koristi DEA analiza, DEAprozor analiza, DEA Malmquist indeks produktivnosti, Fuzzy Topsis metoda i drugi matematički modeli i metode,pored statističke analize. Imajući to u vidu, u ovom radu se istražuje dinamika efikasnosti i totalne faktorskeproduktivnosti trgovinskih preduzeća u Srbiji po pojedinim regionima primenom DEA prozora analize i DEAMalmquist indeksa produktivnosti. Dobijeni rezultati istraživanja pokazuju da je znatno veća efikasnost iproduktivnost trgovinskih preduzeća u regionima Srbija – Sever, Beogradski region, i Region Vojvodine nego uostalim posmatranim regionima (Srbija – Jug, Region Šumadije i Zapadne Srbije i Region Južne i Istočne Srbije).U svim, a posebno u regionima Srbija – Jug, Region Šumadije i Zapadne Srbije i Region Južne i Istočne Srbije,potrebno je preduzeti odgovarajuće mere, pre svega što veća primena novih koncepata upravljanja troškovima,i informacione i komunikacione tehnologije u cilju unapređenja efikasnosti i produktivnosti trgovinskihpreduzeća u budućnosti..
MENADŽMENT DOGAĐAJA KAO PLATFORMA ZA SINHRONIZACIJU AKTIVNOSTI INSTITUCIJA VLASTI, PRIVREDE I OBRAZOVNIH INSTITUCIJA
Authors: Čizmić Elvir
Published: July 2019

Koncept upravljanja događajima predstavlja veliku sliku, odnosno radni okvir, koji daje odgovore nasva bitna pitanja koja se odnose na planirane događaje, upravljanje događajima, projektiranje ioperacije događaja. S obzirom da savremeni koncepti upravljanja troškovima polaze od činjenice da suaktivnosti osnovni elementi koji generiraju troškove, odnosno konzumiraju resurse, jasno da se naupravljanje događajima u potpunosti mogu primjeniti novi sistemi upravljanja troškovima na baziaktivnosti, kao i principi upravljanja projektima. Menadžment događaja je multidisciplinarna naučnadisciplina, jer u kreiranje modela, koncepata i praksi uključuje spoznaje koje dolaze iz drugih naučnihdiciplina, dok kroz aplikaciju istih objedinjuje rad različitih obrazovnih profila koji, poredprofesionalnog menadžera za upravljanje događajima, uključuju psihologe, sociologe, ekonomiste,pravnike i druge obrazovne profile tehničkih i prirodnih znanosti što zavisi od specifičnosti događaja tenjegovog sadržaja, vremena, fokusa, namjene, lokacije kroz jasno razumjevanje istog kaointerdiscipninarno orijeniranog naučnog pravca. Industrija događaja, uključujući sajmove, festivale,sastanke, konferencije, izložbe, vjerske događaje, sport i niz drugih događanja, brzo se razvija i činiznačajan doprinos poslovnom razvoju a posebno u oblasti turizma ali ujedno predstavlja i platformuza početak ili unapređenje poslovnih aktivnosti u drugim privrednim granama. S povećanjem regulacijei rasta državne i korporativne uključenosti u događaje, okruženje za ovaj vid industrije i biznisa jepostalo znatno složenije. Voditelji događaja sada su potrebni za identifikaciju i servisiranje širokograspona sudionika, odnosno interesnih skupina uz balansiranje njihovih zahtjeva, potreba i ciljeva. Ovajrad ima za cilj prezentirati ključne komponente različitih događaja koji bi mogli biti iskorištemi zaprivredni razvoj Bosne i Herecegovine, kroz korištenje naučnih spoznaja menadžmenta događaja kaoplatforme za optimizaciju djelovanja institucija vlasti, poslodavaca i obrazovnih institucija.
MULTIDISCIPLINARNI DODIPLOMSKI STUDIJ POSLOVNE INFORMATIKE IZ PERSPEKTIVE EKONOMIJE I KOMPJUTINGA – PRILAGODBA SAVREMENOM POSLOVANJU
Authors: Bajramović Azra , Brkan-Vejzović Aida , Hubana Armina , Azemović Jasmin , Mušić Denis , Vejzović Zanin
Published: July 2019

Druga polovina prošlog vijeka okarakterisana je vrtoglavim razvojem računarskeindustrije koja je ubrzo postala osnovni preduslov razvoja svih sektora privrede.Uzimajući u obzir pomenuto, porasla je i potreba za stručnjacima koji će u segmentuposlovanja biti u stanju povezati tehničke i upravljačke zajednice. Rezultat je biopokretanje studija poslovne informatike, pod tim istim, sličnim ili različitim imenima,najčešće u okviru poslovnih škola kao studij prvog ciklusa. Međutim, razvojem upodručju poslovanja, a pogotovo kompjutinga, u novom mileniju se ovaj studij sve višepojavljuje kao samostalan sa tendencijom da postane ravnopravna organizacijskajedinica unutar hijerarhije univerziteta. Ovaj rad ima za cilj da predstavi teoretskuosnovu kurikuluma i praktičan primjer studija Poslovna informatika koji je rezultatzajedničkog rada Ekonomskog fakulteta i Fakulteta informacijskih tehnologijaUniverziteta „Džemal Bijedić“ u Mostaru.
Sub-second dynamics of theta-gamma coupling in hippocampal CA1
Authors: Zhang Lu , Lee John , Rozell Christopher , Singer Annabelle C
Published: July 2019

Oscillatory brain activity reflects different internal brain states including neurons’ excitatory state and synchrony among neurons. However, characterizing these states is complicated by the fact that different oscillations are often coupled, such as gamma oscillations nested in theta in the hippocampus, and changes in coupling are thought to reflect distinct states. Here, we describe a new method to separate single oscillatory cycles into distinct states based on frequency and phase coupling. Using this method, we identified four theta-gamma coupling states in rat hippocampal CA1. These states differed in abundance across behaviors, phase synchrony with other hippocampal subregions, and neural coding properties suggesting that these states are functionally distinct. We captured cycle-to-cycle changes in oscillatory coupling states and found frequent switching between theta-gamma states showing that the hippocampus rapidly shifts between different functional states. This method provides a new approach to investigate oscillatory brain dynamics broadly.
Lmx1b is required at multiple stages to build expansive serotonergic axon architectures
Authors: Donovan Lauren J , Spencer William C , Kitt Meagan M , Eastman Brent A , Lobur Katherine J , Jiao Kexin , Silver Jerry , Deneris Evan S
Published: July 2019

Formation of long-range axons occurs over multiple stages of morphological maturation. However, the intrinsic transcriptional mechanisms that temporally control different stages of axon projection development are unknown. Here, we addressed this question by studying the formation of mouse serotonin (5-HT) axons, the exemplar of long-range profusely arborized axon architectures. We report that LIM homeodomain factor 1b (Lmx1b)-deficient 5-HT neurons fail to generate axonal projections to the forebrain and spinal cord. Stage-specific targeting demonstrates that Lmx1b is required at successive stages to control 5-HT axon primary outgrowth, selective routing, and terminal arborization. We show a Lmx1b→Pet1 regulatory cascade is temporally required for 5-HT arborization and upregulation of the 5-HT axon arborization gene, Protocadherin-alphac2, during postnatal development of forebrain 5-HT axons. Our findings identify a temporal regulatory mechanism in which a single continuously expressed transcription factor functions at successive stages to orchestrate the progressive development of long-range axon architectures enabling expansive neuromodulation.
Genome-wide identification and classification of theHsfandsHspgene families inPrunus mume, and transcriptional analysis under heat stress
Authors: Wan Xueli , Yang Jie , Guo Cong , Bao Manzhu , Zhang Junwei
Published: July 2019

The transcriptional activation of heat shock proteins (Hsps) by heat shock transcription factors (Hsfs) is presumed to have a pivotal role in plant heat stress (HS) response.Prunus mumeis an ornamental woody plant with distinctive features, including rich varieties and colors. In this study, 18 Hsfs and 24 small Hsps (sHsps) were identified inP. mume. Their chromosomal locations, protein domains, conserved motifs, phylogenetic relationships, and exon–intron structures were analyzed and compared withArabidopsis thalianaHsfs or sHsps. A total of 18 PmHsf members were classified into three major classes, A, B, and C. A total of 24 PmsHsps were grouped into eight subfamilies (CI to CIII, P, endoplasmic reticulum, M, and CI- or P-related). Quantitative reverse transcription PCR analysis revealed that members of the A2, A7, and A9 groups became the prominent Hsfs after heat shock, suggesting their involvement in a key regulatory role of heat tolerance. Most of thePmsHspgenes were up-regulated upon exposure to HS. Overall, our data contribute to an improved understanding of the complexity of theP. mume HsfandsHspgene families, and provide a basis for directing future systematic studies investigating the roles of theHsfandsHspgene families.
Systematic Review: Training Needs of Agriculture Extension Workers
Authors: Saleh Jasim Mohammed
Published: July 2019

Purpose: This paper aims to contribute to the body of knowledge around best to identify training needs of the Agricultural Extension Workers (AEW).

Methodology: Borich’s need assessment model used to identify training needs of the workers in agricultural extension. Also, to know which method is suitable to identify training needs.       

Finding: Every area needs different training and any skills, knowledge and attitude need another training also should be focused on environment to identify which attitude, skills or knowledge  need  training due to any village (area) and farmers need different training.

Practical Implication: This study is important for the development of skills, attitude, knowledge and information for workers in agricultural extension, as well as to raise the efficiency and ability of the employees and develop their abilities to raise productivity and increase income in general.

Theoretical Implication: This research highlights the important role training needs plays in job performance for the planning in the future. Also, to know which skills, knowledge or attitude need more training.
Are Dairy Farmers of Haor (Wetland) Areas Food Secured?
Authors: Chokraborti Sree Shawon , Baset Md. Abdul , Zabir Abdullah Al , Islam Md. Ariful
Published: July 2019

The present study was conducted to assess food security the status of dairy farmers in haor areas of Sunamganj district, Bangladesh. Food security index and binary logistic regression analysis were applied to analyze the data and data were collected by face to face interview of randomly selected dairy farmers with a structured questionnaire. About 56 percent of the dairy farmers were food insecure as they took below 2122 kilo calorie per day per person and rest 44 percent was food secure. Occupation and number of milking cows were found significantly interrelated with food security of dairy farmers and education was also responsible for the food security of respondents. So it may be concluded that the government and other developmental organization should take essential steps which will ensure better dairy farming to improve the food security condition of dairy farmer and help to keep the dairy sector alive.
Antiretroviral Drugs for Treatment and Prevention of HIV in Adults: 2024 Recommendations of the International Antiviral Society–USA Panel
Authors: Gandhi Rajesh T. , Landovitz Raphael J. , Sax Paul E. , Smith Davey M. , Springer Sandra A. , Günthard Huldrych F. , Thompson Melanie A. , Bedimo Roger J. , Benson Constance A. , Buchbinder Susan P. , Crabtree-Ramirez Brenda E. , del Rio Carlos , Eaton Ellen F. , Eron Joseph J. , Hoy Jennifer F. , Lehmann Clara , Molina Jean-Michel , Jacobsen Donna M. , Saag Michael S.
Published: December 2024

Importance

New data and new antiretroviral drugs and formulations continue to become available for the prevention and management of HIV infection.

Objective

To provide updated recommendations for HIV treatment and clinical management and HIV prevention.

Methods

A panel of volunteer expert physician scientists were appointed to provide updated consensus recommendations for 2024. Relevant evidence in the literature since the last report was identified from PubMed and Embase searches (which initially yielded 3998 unique citations, of which 249 were considered relevant); from ongoing monitoring of the literature by the panel members; from data submitted by product manufacturers; and from studies presented at peer-reviewed scientific conferences between June 2022 and October 2024.

Findings

Antiretroviral therapy continues to be recommended for all individuals with HIV. For most people with HIV, initial regimens composed of an integrase strand transfer inhibitor (InSTI), specifically bictegravir or dolutegravir, with 2 (and in some cases 1) nucleoside or nucleotide reverse transcriptase inhibitors are recommended. Recommendations are made for those with particular clinical circumstances, such as pregnancy and active opportunistic diseases, as well as for those unable to take InSTIs. Regimens may need to be changed for virologic failure, adverse effects, convenience, or cost, among other reasons. Long-acting injectable therapy is available for those who prefer not to take daily oral medications and for people struggling with adherence to daily therapy. Recommendations are provided for laboratory monitoring, management of substance use disorders and weight changes, as well as use of statins for cardiovascular disease prevention. For HIV prevention, oral (daily or intermittent) and injectable long-acting medications are effective options for people at increased likelihood of HIV exposure. Further, new tools for maintaining health and well-being among people with HIV, such as doxycycline postexposure prophylaxis to avert sexually transmitted infection, and strategies to treat substance use disorders, are recommended. Disparities in HIV acquisition and care access are discussed and solutions proposed.

Conclusions

New approaches for treating and preventing HIV offer additional tools to help end the HIV epidemic, but achieving this goal depends on addressing disparities and inequities in access to care.
Acceptability of Guidelines to Stop Colon Cancer Screening by Estimated Life Expectancy
Authors: Brotzman Laura E. , Zikmund-Fisher Brian J. , Kerr Eve A. , Kabeto Mohammed , Kullgren Jeffrey T.
Published: December 2024

This cross-sectional study examines whether older adults with limited vs longer estimated life expectancy accept guideline recommendations that patients stop getting screened for colon cancer once they reach age 75 years.
p12 isoform‐2 is a regulatory subunit of human DNA polymerase delta and is dysregulated in various cancers
Authors: Sahu Jugal Kishor , Thakur Shweta , Subhadarsini Ipsita , Acharya Narottam
Published: December 2024

Dysregulation of human DNA polymerase delta (Polδ) subunits is associated with genome instability and pathological disorders. Genome databases suggest the expression of several spliced variants of subunits which may alter Polδ function. Here, we analyzed the protein‐encoding variants of the Polδ subunit p12 and their association with cancer. p12 isoform‐2 (p12*) encodes a 79 aa protein with a C‐terminal tail distinct from the previously characterized p12. Like p12, p12* dimerizes and interacts with p125 and p50 subunits and is thus an integral component of Polδ. Further, we observed dysregulated p12* expression in low‐grade glioma, renal, thyroid, and pancreatic carcinomas. This study identifies a previously unrecognized Polδ complex and highlights a possible regulatory role of p12 variants in cellular phenotypes.
Adaptive Fuzzy Bipartite Time‐Varying Formation Tracking Control for Multiple Lagrangian Systems With Lumped Uncertainties via Finite‐Time Hierarchical Mechanism
Authors: Wang Shuang , Han Tao , Xiao Bo , Yan Huaicheng
Published: December 2024

This article explores the bipartite time‐varying formation tracking problem for multiple Lagrangian systems in the presence of lumped uncertainties, including friction, external disturbances, and actuator faults. To tackle this challenging problem, a finite‐time hierarchical mechanism is designed without prior knowledge of uncertainties, which decomposes the above issue into two sub‐control problems: 1) the distributed finite‐time estimation problem and 2) the local adaptive fuzzy tracking problem. The distributed estimator algorithm is developed to achieve a finite‐time bipartite time‐varying formation configuration under a cooperative‐antagonistic interaction topology. Further, these estimated states are employed to construct the adaptive fuzzy tracking controller based on fuzzy‐logic systems and fault‐tolerant techniques. Lyapunov functions are utilized to ensure that the considered systems attain the desired formation while maintaining finite‐time stability of tracking errors. Finally, simulation experiments are performed to verify the effectiveness of the proposed control algorithm.
Adaptive Fixed‐Time Prescribed Performance Synchronization Control for Multi‐Motor Driving Systems
Authors: Huang Xin , Liu Cheng‐Lin , Shan Liang
Published: December 2024

In this article, the fixed‐time synchronization control problem is developed for multi‐motor driving systems. Initially, the issue of multi‐motor tracking and synchronization is converted into a stability issue through the introduction of coupling synchronization errors. Subsequently, based on the prescribed performance control (PPC) scheme, an adaptive fixed‐time PPC is proposed to ensure that the synchronization error and tracking error converge to the prescribed boundary. Additionally, the radial basis function (RBF) neural networks are employed for estimating uncertain nonlinearities. Finally, the simulation results showcase the effectiveness of the proposed method.
Multifunctional Photonic Nanomaterials and Devices for Digital Photomedicine via Neuro‐Immune Cross‐Talks
Authors: Kim Seong‐Jong , Kim Tae Yeon , Kim Hyeongkyu , Kim Jongshin , Rogers John A. , Hahn Sei Kwang
Published: December 2024

The nervous and immune systems are closely interconnected, and influence the onset and progress of various diseases. Accordingly, understanding the interaction of the neural system and the immune system becomes very important for the treatment of intractable diseases with the analysis of therapeutic mechanisms, such as autoimmune diseases, neurodegenerative diseases, cancers, and so on. The conventional immunomodulation treatments have been mainly carried out by drug administration, but they have suffered from systemic negative side‐effects with only limited effects on the specific disease. In this Perspective, photonic nanomaterials and devices are reviewed and discussed for digitally controlled neurostimulating photomedicine via photobiomodulation and optogenetics from the unique viewpoint of neuro‐immune cross‐talks. The prospects and perspectives to integrate photonic nanomaterials with advanced wearable and implantable healthcare devices are also provided and highlighted to revolutionize the therapeutic strategies by the interaction of neural and immune systems, and optimize the treatment protocols for futuristic digital photomedicine. This approach will revolutionize the fields of neurostimulation and immune regulation for further clinical applications.
Nasal Mucus Cytokines Are Correlated with Spirometry Measures in CRS Patients with Comorbid Asthma
Authors: Lubner Rory J. , Dorismond Christina , Krysinski Mason , Li Ping , Chandra Rakesh K. , Turner Justin H. , Newcomb Dawn C. , Cahill Katherine N. , Chowdhury Naweed I.
Published: December 2024

Key points

CRS patients with asthma show differential nasal mucus cytokine signatures based on endotype.

IL‐7 concentration is positively associated with higher %FEV1 and %FVC in CRS patients with asthma.
Supramolecular Rotor Assembly for the Design of a Hybrid Ferroelectric‐Antiferromagnetic Multiferroic Semiconductor
Authors: Wang Na , Li Hua‐Kai , Shen Huai‐Yi , Ye Le , Xu Ze‐Jiang , Ren Mei‐Ling , Yao Nian‐Tao , Shi Chao , Ye Heng‐Yun , Miao Le‐Ping
Published: December 2024

Ferroelectric (FE)‐antiferromagnetic (AFM) multiferroic materials have sparked growing interest due to their huge possibilities in energy‐saving, photoelectric devices, nonvolatile storage, and switches. However, realizing FE‐AFM properties in a hybrid molecular material is difficult because ferroelectric and magnetic orders are commonly mutually exclusive. Here, we report an FE‐AFM multiferroic semiconductor [NH4(18‐crown‐6)]2[Mn(SCN)4] (NCMS) by supramolecular assembly approach via molecular rotor synthon [NH4(18‐crown‐6)] and inorganic magnetic module [Mn(SCN)4]. Interestingly, NCMS shows good ferroelectricity with a spontaneous polarization (Ps) of 5.94 μC cm−2 higher than most crown‐ether‐based ferroelectrics. Especially, the realization of antiferromagnetism is for the first time in the crown ether hybrid perovskite ferroic systems. Additionally, semiconductor NCMS displays an X‐ray radiation detection response with a large photo/dark current on‐off ratio (197). Our study not only gives a deep insight into understanding multiferroic properties but also provides a novel and efficient approach to realizing high‐performance hybrid multiferroic materials.
Weakly Magnetized Accreting Neutron Stars as Seen by IXPE
Authors: Di Marco Alessandro ,   IXPE Science Team
Published: December 2024

The Imaging X‐ray Polarimetry Explorer, recently awarded by the American Astronomical Society with the Bruno Rossi prize, observed several accreting neutron stars in X‐ray binaries during the first 2 years of its prime mission. Results obtained for weakly magnetized neutron stars allow us to model the geometry and the physical status of the different emitting regions (accretion disk, boundary/spreading layer) in a completely novel way, showing a more intricate scenario with respect to the one initially anticipated based on theoretical models. In particular, polarization measurements have demonstrated variations with energy and time, which are highly intriguing. Here, a summary of the IXPE findings for these sources, in particular 4U 1820–303, and Cir X–1 are reported.
Cell line development and bioreactor process optimization for an atezolizumab biosimilar
Authors: Kuyucu Ayca Zeybek , Sayili Dogu , Orkut Ridvan , Mert Olcay , Tarman İbrahim Oguzhan , Lulaci Busra , Sencer Ali Mert , Pekmezci Asli Kurden , Avci Mehmet Ender , Kalyoncu Sibel , Inan Mehmet
Published: December 2024

Checkpoint inhibitors are widely recognized immunotherapeutic drugs, known for their effectiveness in treating various cancers. Atezolizumab, targeting the immune checkpoint programmed death‐ligand 1, is successfully used to treat several types of cancers. Atezolizumab is a potential biosimilar candidate due to its huge success in the clinic but there is no literature on its production process in mammalian cells. In this study, we generated a monoclonal cell line derived from recombinant Chinese hamster ovary DG44 cells to produce atezolizumab. The selected single clone was employed for media screening and process development. Following production in a 7‐L bioreactor, atezolizumab was purified using a three‐step chromatographic method. Finally, the purified atezolizumab was characterized and compared with commercial atezolizumab (Tecentriq) through several chromatographic and kinetics analyses.