bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALISIS PERMEABILITAS TANAH LAPISAN ATAS DAN BAWAH DI LAHAN KOPI ROBUSTA
Authors: Alista Febri Ayu , Soemarno S
Published: July 2021

Coffee (Coffea sp.) is one of the leading commodities in Indonesia for it has a high economic value. In Bangelan Village, Malang Regency, there is a company that manages robusta coffee commodity. The land was converted into a coffee plantation from forest land. The conversion of forest land into a coffee plantation caused the decreasing number of total soil pores lower than the forest land. This will make it difficult for water to absorb into the soil. This research was conducted in Afdeling Besaran, PT. Perkebunan Nusantara XII Kebun Bangelan to elucidate the value of soil permeability and the nature of the relationship between them. The result of this research indicated that the permeability of the soil on each land map unit was in the category of fast permeability class and slightly fast permeability class. The highest soil permeability value was found on land map unit 2 at the 56 years average age of coffee robusta field, with each depth of 6.03 cm hour-1, 7.95 cm hour-1, and 7.82 cm hour-1. Soil permeability is influenced by soil porosity, sand and silt with a positive correlation way. In addition, aggregate stability, soil bulk density and clay also significantly affected the soil permeability with a negative correlation way. Permeability affected the production of robusta coffee plants with a positive correlation way of 16.09%.
ANALISIS KUALITAS TANAH PADA LAHAN TEGALAN BERPASIR DI DAS MIKRO SUPITURUNG, KABUPATEN KEDIRI, JAWA TIMUR
Authors: Kurniawan Mochamad Fikri , Rayes Mochtar Lutfi , Agustina Christanti
Published: July 2021

Soil quality is the ability of soil that plays a role in maintaining plant productivity, preserving and maintaining water availability and supporting human activities. Soil quality assessment is measured based on indicators that describe important soil processes based on the physical, chemical and biological properties of the soil. The level of soil quality in a plot of land is assessed based on the soil quality index. This research was conducted from August to December 2020 in the Supiturung Micro Watershed, Kediri Regency, East Java using a graphical survey method based on the Land Map Unit. Soil samples were taken at a depth of 0-20 cm at each observation point (20 points) for analysis in the laboratory. Soil quality indicators are determined based on key soil properties with the Minimum Data Set (MDS) method, with soil quality indicators from soil physical properties including texture, bulk density, porosity and soil chemical properties including pH, available-P, exchangeable-K, total-N, organic-C. Soil quality index was calculated by weighting soil quality indicators with criteria which divided into 5 classes, i.e. (i) very low class (0.00-0.19), (ii) low (0.20-0.39), (iii) moderate (0.40-0.59), (iv) good (0.60-0.79) and (v) very good (0.80-1.00). The results showed that the soil in land unit 2 had different limiting factor values on the percentage of sand and dust from the soil texture, the total-N content of the soil and the organic-C content of the soil which caused differences in soil quality. There are two indicators of soil quality, namely the percentage of dust from the soil texture and the total N content of the soil which has the most influence on the soil quality index.
INDEKS KUALITAS TANAH PADA SATUAN LAHAN YANG DITANAMI JAGUNG DI KENAGARIAN MUNGKA, KABUPATEN LIMA PULUH KOTA
Authors: Hamdi Fadil Hukama , Juniarti J , Agustian A
Published: July 2021

Land continuously planted with corn will decrease land quality. Good land quality is needed to support soil function as a growing medium and keep a sustainable environment. This research was aimed to identify the soil quality index at land unit planted with corn in Mungka, ,Lima Puluh Kota Regency. This research used an explorative descriptive method through land survey and soil analyses in the laboratory. The samples were taken based on purposive random sampling at each land unit under the same slope (8%). There were three land units being sampled, and those were corn-corn, corn-eggplant, and corn-cassava cropping pattern. Corn-corn ropping pattern had the best soil quality index (0.89), followed by corn-cassava (0.86), and corn-eggplant (0.85) on the top 20 cm soil depth. On the 20-40 cm soil depth, the soil quality indices 0.82, 0.82, 0.83, for corn-eggplant, corn-corn, and corn-cassava cropping pattern, respectively. The quality index of the land under the corn cropping pattern was considered good either on the top 0-20 cm or 20-40 cm soil depth. This was due to the addition of organic matter from poultry manure to the land regularly. Based on this research, it is recommended to apply OM regularly to corn cropping pattern to keep a good soil quality index.
EKSPLORASI DAN IDENTIFIKASI MIKORIZA DARI BERBAGAI MACAM VEGETASI PADA LAHAN AGROFORESTRY
Authors: Purba Jessica Maria , Prasetya Budi
Published: July 2021

Soil fertility degradation has been accelerated by the heavy use of inorganic fertilizers for a long time, especially in agroforestry lands of Sumbermanjing Wetan, Malang, East Java. This study was aimed to find out arbuscular mycorrhizae that can be used for improving soil fertility. This study was conducted by purposive random sampling continued by randomized block design with the measured variables were basal area, canopy, number of spores, percentage of root mycorrhizal colonization, soil pH, soil C-organic, available P, litterfall, and types of spores. The results showed that the most common type of spore found was Glomus sp. The spore populations depended on vegetation and were most commonly found in Albicia falcataria. The soil pH of agroforestry land ranged from 5.1 to 5.4, organic carbon content ranged from 3.43 to 4.04%, and available P content ranged from 7.7-9.9 kg P2O5 ha-1. Vegetation affected the soil physicochemical and biological properties.
Magnetic pulse welding
Authors: Broeckhove Jan , Willemsens Len , Faes Koen
Published: July 2021

The contemporary construction industry is evolving with a rapid pace and is pushing technological boundaries. Together with that progress new requirements on joints and joining techniques are imposed. This paper describes our research concerning an advanced joining technique, the Magnetic Pulse Welding process (MPW).The first part of this article briefly describes the MPW process and summarizes the differences with respect to conservative welding techniques. Secondly an analytical model of the process will be investigated on accuracy. This model was developed by the manufacturer of the MPW machine used at the Belgian Welding Institute. Further a description is given of the methods which are used to investigate the experimental joints. After describing the recently performed experiments, finally an overview will be given depicting the work that will be carried out during the rest of this master thesis
The comparison of rapeseeds’ oils from hybrid and open-pollinated varieties by their heating values in the aspect of Diesel utilization
Authors: Sarkozi E. , Janosi L.
Published: July 2021

The rape is one of the suitable plant species for biofuel feedstock in Hungary. Currently there are over 100 admitted rape sorts recorded in Hungary and their oils’ application as biodiesel proposes new aspects of evaluation. From references it is noticeable that there are differences in the physical and chemical properties of the various rape sorts’ oils and rapeseed-methyl-esters. Our aim is to analyze the differences in the quality of the various rape sorts’ oils and to determine the most appropriate rape sort in the viewpoint of technical utilization. In the course of present research work we have measured the heating values of 21 various rapesorts’ oils -12 from open-pollinated varieties and 9 from hybrids- and examined the differences between them. The outcome values dispersed in the range of the heating values found in the references, but the differences between them are less then the predicted, the variance and the coefficient of variation are reasonably slight, so the examined rape sorts’ oils are similar in the viewpoint of the heating value. Furthermore, the energy content of the rapeseed oils is independent of the type (hybrid or open-pollinated variety) of the plant.
Aerodynamics of flue organ pipe voicing
Authors: Steenbrugge Dirk , De Baets Patrick
Published: July 2021

The objective of this paper is to investigate the possibility of giving useful interpretations of flueorgan pipe voicing practices in terms of the aerodynamical and aeroacoustical behaviour of the pipes. Anoverview is first given of the current state of the knowledge on sound generation in flue instruments. Afteran introduction into the limited literature on voicing an scheme is presented as a possible framework toclassify and characterize various voicing approaches. Use is made of dimensionless analysis to quantifythe specific properties of voicing methods in terms of aerodynamic parameters rather than geometric data.It is concluded that such an analysis might be a useful tool to be able to better document and understandhistoric instruments and their genesis in order to better conserve them.
Abrasive tribological testing of different hot-dip galvanized multilayers
Authors: Szabadi Laszlo
Published: July 2021

One method for steel structures corrosion resistance is using hot-dip galvanizing process.Nowdays it is widely used in Europe considering its favourable characteristics. Lately beside thecorrosion resistance demand of hot-dip galvanized coatings as a new requirement is wear resistance.The cause of this is more and more steel constructions are provided with zinc coatings as durableprotection against corrosion. The industrial floor boards, agricultural walking grids get heavy abrasioneffect. The abrasive wear resistance is a less tested, less known domain.
Development of the Vierendeel: calculation, aesthetics, welding, concrete
Authors: Verswijver Koen , De Meyer R. , Denys Rudi , De Kooning E. , Belis J.
Published: July 2021

The Vierendeel is a frame with rigid joints patented in 1896 by Belgian engineer ArthurVierendeel (1852-1940). His invention came about after he noticed that experiments and calculationmethods on iron and steel frameworks didn‟t agree, making his invention a response in the then discussionon secondary stresses. After designing a church tower and testing a full-scale bridge model during the 1897Brussels World Fair, many bridges „système Vierendeel‟ were erected the following decades in hishomeland, as well as a few dozens around the globe. At times the discussion on the Vierendeel got heatedin trade journals and amongst people, mainly due to a lack of „visual‟ safety and theoretical uncertaintiesconcerning calculation, safety factors and welding techniques. Nowadays the Vierendeel principle is stilltopical and many (structural) designers apply his formal ideas. This led to a broader meaning of the wordVierendeel varying from aesthetic to strictly structural.
Experimental and numerical investigation into effect of elevated temperature on fretting fatigue behavior
Authors: Hojjati Talemi R. , Soori M. , Abdel Wahab M. , De Baets Patrick
Published: July 2021

t Fretting fatigue damage occurs in contacting parts when they are subjected to fluctuating loadingsand sliding movements at the same time. This phenomenon may occur in many applications such asbearings/ shafts, bolted and riveted connections, steel cables, and steam and gas turbines. In this paper,the effect of elevated temperature on fretting fatigue life of Al7075-T6 is investigated using a new device forfretting fatigue tests with variable crank shaft mechanism. Also a finite element modeling method was usedto estimate crack propagation lifetime in aluminum alloy, Al7075-T6 specimens at elevated temperatureunder fretting condition. In this method, shear and normal stresses that are caused by contact load areupdated at each crack growth increment. Finally, a comparison between the experimental and numericalresults is done in order to evaluate the FE simulation.Department of mechanical engineering, Islamic Azad University, Takestan Branch, Takestan, IranThe experimental results show that: (i) fretting fatigue life of the material increases with temperature up to350°C by 180% for low stresses and decreases by 40% for high stresses, (ii) this fashion of variation offretting fatigue life versus temperature is believed to be due to degradation of material properties whichoccurs by overaging and wear resistance increase due to oxidation of aluminum alloy. While overaginggives rise to degradation of mechanical strength of material and hence the reduction of its fretting fatiguelife, surface oxidation of the specimens brings some improvement of fatigue behavior of the material.Metallurgical examination of the specimens reveals that temperature results in precipitation of impurities ofal-7075-T6. The size of precipitated impurities and their distances gets bigger as temperature increases.This could be a reason for material degradation of specimens which are exposed to heating for longer timeduration.
Dry sliding friction and wear response of WC-Co hardmetal pairs in linearly reciprocating and rotating contact
Authors: Perez Delgado Yeczain , Bonny Koen , De Baets Patrick , Neis Patric Daniel , Rodriguez Fereira Vanessa , Malek O. , Vleugels J. , Lauwers B.
Published: July 2021

This paper presents an experimental evaluation of friction and wear properties of WC-Cocemented carbides. A comparison is made between unlubricated rotating and linearly reciprocating pin-onplate sliding pairs. The plate specimens were WC-10wt%Co grades surface finished by polishing orsequential wire-EDM steps, whereas WC-6wt%Co pins were used as counter body. The tests were carriedout at room temperature using a sliding speed of 0.30m/s and mean Hertzain contact pressures of 1.76 and2.08 GPa, i.e., normal contact loads of 15N and 25N, respectively. The worn surfaces on plate sampleswere quantified in terms of 2–D wear profiles obtained by means of surface topography scanningequipment. Wear mechanisms such as polishing and abrasion were identified using optical microscopy.Inferior tribological characteristics for wire-EDM surface finish compared to polishing were found. Higherfriction coefficient and wear levels were measured in unidirectional rotating sliding experiments comparedto linearly reciprocating test conditions.
Turning specialities of ZrO2 ceramics
Authors: Fledrich G. , Pálinkás I. , Keresztes R. , Zsidai L. , Petróczki K.
Published: July 2021

In place of brittle ceramics used so far have appeared up-to-date so called tough ceramicmaterials resisting better against mechanical effects [6]. Such material is the zirconium-dioxide, too. Theimportant advantage of hard-turning is the applicability of universal tool. Various outlines can be formed bya tool given. Machining ceramics in case of using traditional machining (turning, milling, drilling) requiresspecial technological conditions (tools, machine-tools, technological parameters, etc.) which are developingpresently [2]. We would like extending our research work in this course, too.To clarify the machinability – turning – of ZrO2 ceramics we developed a cutting force measurements for theapplied CBN and PCD cutting tools. The forces were studied in the function of cutting speed and feed, thesurfaces were analized by SEM and the cutting process was controlled by thermo-camera. The failure ofcutting edges were also studied. The summarized results suggest the possible turning possibilities of ZrO2ceramics.
Machinability of engineering polymers
Authors: Keresztes Robert , Kalácska Gabor , Zsidai L. , Dobrocsi Z.
Published: July 2021

Nowadays parts made of up-to-date engineering plastics are used more and more in mechanicalengineering practice. These machine-elements are produced most frequently by injection molding or by onecutting process. The injection molding technology are used generally for great number of pieces, in case ofserial production while cutting processes are preferred to piece (unit) or smaller number production.We used lathe and measured the main- and feeding-directional cutting force at different engineeringpolymers (cast PA6, POM C and UHMW PE, HD 1000). We compared these results with the tensileproperties of the materials. The analysis made can be well used in practice.
Roughness measurement problems in tribological testing
Authors: Rodriguez Fereira Vanessa , Sukumaran Jacob , Ando Matyas , De Baets Patrick
Published: July 2021

In tribological measurement of thermoplastics against steel the surface roughness has a potentialeffect in dictating the frictional behavior of the material. In most cases the roughness of the specimen ismeasured before and after the test, where it affects the friction force and influences the mechanisminvolved. The roughness of the material is not the exact value and it has a deviance which depends uponthe machining process used in preparing the surface. Generally, the direction of machining has an influenceon the topography of the surface in case of turning, milling and drilling but in case of pressed componentsthe direction has no effects. In order to maintain ideal test condition the surface roughness of the testmaterials has to be consistent for the given number of samples. Even though the test specimens aremachined in the same machine with same parameters there are number of parameters involved in decidingthe consistency of the surface roughness. The roughness of the surface are defined by number ofparameters such as Ra, Rz and few 3D parameters in such a case narrowing down to a specific constant isvital. The results from the roughness is not made from one measurement were an average and deviancefrom several measurement decides that if two ideal samples has same or different roughness.
Symmetry and similarity properties of 2D figures
Authors: Szakál Z. , Zsoldos I.
Published: July 2021

A new algorithm has been developed to sort two-dimensional figures by their shape. Thealgorithm can find the figures having equal or approximately equal shape independently fromgeometrical measures and the complexity of the shapes. It is based on the definition of the symmetrydiagram which was introduced for symmetry recognition originally. The new method can be used forsorting different parts at assembly lines and for reverse engineering, too.
Development and validation of a high constraint modified boundary layer finite element model
Authors: Verstraete Matthias , De Waele W. , Hertelé Stijn
Published: July 2021

When a notched structure is loaded, its behaviour is not only affected by the material propertiesbut also by the geometry (of both the structure and the defect) and loading condition, alternatively termedas constraint condition. Therefore, the relation between the failure behaviour of a small scale fracturemechanics test and a full scale structure needs to be elucidated.In an attempt to understand and describe such relationships, the crack tip stress fields are analysed bymeans of finite element simulations and compared for several test specimen geometries. A reference forcomparison is the crack tip stress field obtained from a high constraint reference geometry, further called amodified boundary layer model.First, this article provides some theoretical background on the modified boundary layer model. Second, thedevelopment of a 2D model is outlined in detail, focussing on the mesh design in the vicinity of the crack tipand the applied boundary conditions. Afterwards, an analytical and numerical validation is provided, basedon the level of the applied load and, on the other hand, on the magnitude of the crack tip stress fields.Finally, this validated model is used for the comparison of several constraint parameters. This comparisonindicates a weak influence of the T-stress on the Q-parameter for positive T-stresses. In contrast, negativeT-stresses result in more pronounced negative Q-values.
Development of a continuum plasticity model for the commercial finite element code ABAQUS
Authors: Safaei M. , De Waele W.
Published: July 2021

The present work relates to the development of computational material models for sheet metalforming simulations. In this specific study, an implicit scheme with consistent Jacobian is used forintegration of large deformation formulation and plane stress elements. As a privilege to the explicitscheme, the implicit integration scheme is unconditionally stable. The backward Euler method is used toupdate trial stress values lying outside the yield surface by correcting them back to the yield surface atevery time increment. In this study, the implicit integration of isotropic hardening with the von Mises yieldcriterion is discussed in detail. In future work it will be implemented into the commercial finite element codeABAQUS by means of a user material subroutine.
Fluid mechanical aspects of open- and closed-toe flue organ pipe voicing
Authors: Steenbrugge D.
Published: July 2021

Open- and closed-toe voicing of flue organ pipes constitute two opposite extremes of possible ways todetermine the air-jet flow rate through the flue. The latter method offers more voicing control parametersand thus more flexibility, at the expense of a necessary pressure loss at the toe hole. Another differencebetween both cases arises from different air-jet characteristics, such as velocity profile, Re number, flowmomentum or aspect ratio, the latter influencing jet instability. Furthermore, for closed-toe voicing, the flowfield in the pipe foot is modified by an axisymmetric air jet created through the highly constricted toe hole.Velocity measurements on air jets, pressure measurements in the pipe foot are presented, compared anddiscussed for both voicing methods. The ratio of flue to toe hole area is shown to be the sole pipeparameter to entirely determine the jet velocity and can be useful to quantitatively characterize flue and toehole voicing. Open-toe voicing turns out to be the more delicate and low-pressure only method becauseany modification of the flue has consequences on all aspects of the pipe operation, whereas the closed-toemethod, in connection with higher pressures and with active involvement of cut-up adjustment, allows someseparation between sound timbre and power regulation.
Stability of offshore structures in shallow water depth
Authors: Van den Abeele F. , Vande Voorde J.
Published: July 2021

The worldwide demand for energy, and in particular fossil fuels, keeps pushing the boundaries of offshoreengineering. Oil and gas majors are conducting their exploration and production activities in remotelocations and water depths exceeding 3000 meters. Such challenging conditions call for enhancedengineering techniques to cope with the risks of collapse, fatigue and pressure containment.On the other hand, offshore structures in shallow water depth (up to 100 meter) require a different anddedicated approach. Such structures are less prone to unstable collapse, but are often subjected to higherflow velocities, induced by both tides and waves. In this paper, numerical tools and utilities to study thestability of offshore structures in shallow water depth are reviewed, and three case studies are provided.First, the Coupled Eulerian Lagrangian (CEL) approach is demonstrated to combine the effects of fluid flowon the structural response of offshore structures. This approach is used to predict fluid flow aroundsubmersible platforms and jack-up rigs.Then, a Computational Fluid Dynamics (CFD) analysis is performed to calculate the turbulent Von Karmanstreet in the wake of subsea structures. At higher Reynolds numbers, this turbulent flow can give rise tovortex shedding and hence cyclic loading. Fluid structure interaction is applied to investigate the dynamicsof submarine risers, and evaluate the susceptibility of vortex induced vibrations.As a third case study, a hydrodynamic analysis is conducted to assess the combined effects of steadycurrent and oscillatory wave-induced flow on submerged structures. At the end of this paper, such ananalysis is performed to calculate drag, lift and inertia forces on partially buried subsea pipelines.
Design characteristics that improve the fatigue life of threaded pipe connections
Authors: Van Wittenberghe Jeroen , De Baets Patrick , De Waele Wim , Galle Timothy , Bui Tien Thanh , De Roeck Guido
Published: July 2021

Threaded pipe connections are commonly used to connect risers, tendons, drill pipes and wellcasing strings. In these applications fatigue resistance plays an important role. A large variety of patenteddesign features exist, all claiming to improve the connection’s fatigue life. However, patent documents onlycontain claims and numerical or experimental data about these connection’s performance is generally notpublished. This makes it hard to make a quantitative comparison between different designs. In this study anoverview is given of fatigue resistant threaded connections. Two major methods to improve the fatigue lifeof a connection were identified. First of all, local stress concentrations can be reduced by optimizing thegeometry of the threads. Second the global shape of the connection can be optimized to obtain a moreuniform load distribution.Using a parametric finite element model, different designs were compared. The connections were modelledby a 2D axisymmetric geometry with non-linear material properties and elaborate contact conditions.Selected designs have been subjected to experimental tests in a four-point bending fatigue setup. Theexperimental tests serve as a validation for the results of the numerical simulations. It was found that themultiaxial stress distribution at the thread roots is the defining factor for the fatigue life of the connection.Nevertheless, these stresses can be changed by the global geometry of the connection. It can beconcluded that the fatigue life of threaded connections is determined by a combination of global and localaspects which should both be analysed for fatigue life calculations.
Failure behaviour of preloaded API line pipe threaded connections
Authors: Seys Jonas , Roeygens Koenraad , Van Wittenberghe Jeroen , Galle Timothy , De Baets Patrick , De Waele Wim
Published: July 2021

This paper reports on numerical and experimental work concerning the fatigue behaviour andsealing capacity of threaded pipe connections (1” API Line Pipe). Numerical simulations are performedusing Abaqus®in combination with ThreadGen©. The fatigue life of a thick-walled standard coupling isdetermined using a four-point bending test. The corresponding S-N curve is compared to results of previouswork on thin-walled specimens. It can be concluded that the standard thick-walled connection has a higherfatigue life than thin-walled ones. In future work, the prediction of fatigue life using established multi-axialcriteria will be evaluated. Further, the sealing capacity of several couplings will be investigated bysubmitting them to different combinations of internal pressure and axial force. Hereto, a specific test setupis designed. The results will then be presented as a test load envelope
LITERATURA INFANTIL E JUVENIL COM PERSONAGENS NEGRAS: UMA ABORDAGEM AFROCENTRADA
Authors: De Souza Renan Fagundes , Jovino Ione da Silva
Published: July 2021

O texto tem como objetivo principal analisar a representação de três personagens femininas em contos destinados ao público infantil e juvenil, com temática africana. Para tanto, foi escolhido o livro Ulomma – A casa da beleza e outros contos, do escritor nigeriano Sunny e ilustrado por Denise Nascimento. Parte-se do reconhecimento da importância dos estudos clássicos sobre contos de fadas e literatura infantil e juvenil, todavia a análise apresentada assume uma perspectiva afrocentrada, buscando a importância da palavra nas culturas africanas e afro-brasileira, o papel das narrativas nas sociedades africanas, onde a oralidade é um elemento central na produção e manutenção das mais diversas culturas, dos valores, conhecimentos, ciência, história, modos de vida, formas de compreender a realidade, religiosidade, arte e ludicidade. O segundo ponto de análise será a representação das personagens femininas, sendo um bloco para cada personagem. A análise se dá tanto do ponto de vista imagético, quanto da construção discursiva via enredo da narrativa, objetivando localizar nos contos a questão das tradições e dos papéis femininos, a maternidade, as relações entre o ser humano e a natureza, o sagrado, relações de poder e principalmente a valorização estética negra.  O artigo é finalizado com   questionamentos sobre os caminhos que os textos dirigidos ao público infantil e juvenil percorreram para chegarem até nós, indicando que a necessidade de construção e rotas alternativas para a compreensão dos mesmos.
Lack of Effect of Human Chorionic Gonadotropin in Mixed Lymphocyte Reaction in Xenotransplantation
Authors:   Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA, Jagdale Abhijit , Banks C. Adam ,   Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA, Iwase Hayato ,   Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA, Cooper David K.C. ,   Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA, Hara Hidetaka ,   Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA
Published: July 2021

It has been speculated that the immunomodulation associated with pregnancy, e.g., decreasing pro-inflammatory cytokines, increasing anti-inflammatory cytokines, upregulation of T regulatory cells (Tregs), is in part due to the effect of human chorionic gonadotropin (hCG). In this study, we tested the effect of hCG on proliferation of human peripheral blood mononuclear cells (PBMCs) stimulated by irradiated pig PBMCs. Mixed lymphocyte reaction (MLR) was carried out with human PBMCs as responders and irradiated wild-type pig PBMCs as stimulators, with or without hCG. The spontaneous mean proliferation of CD3+T cells was 7% and, when stimulated by phytohemagglutinin (PHA) was 43%. When stimulated with irradiated wild-type pig PBMCs, CD3+T cell proliferation was 18%. When hCG (at concentrations of 100 IU/ml, 500 IU/ml, and 1,000 IU/ml) was added to the MLR, the proliferation of CD3+T lymphocytes was 20%, 20%, and 18%, respectively. hCG also had no effect on the proliferation of CD4+T and CD8+T cells. hCG does not suppress human lymphocyte proliferation stimulated by wild-type pig PBMCs in MLR (unless this is related to an increased number of Tregs, which was not tested in this study).
Evaluating patients' satisfaction and preferences with a secondary prevention cardiovascular polypill: the Aurora Study
Authors: Cosin-Sales Juan , Murcia-Zaragoza José M , Pereyra-Rico Hector O , la Guía-Galipienso Fernando de , Hermans Kurt , Rubio Gabriel
Published: July 2021

Aim:
To evaluate the satisfaction, preferences and adherence of patients in secondary cardiovascular prevention treated with the Spanish National Cardiovascular Research Centre cardiovascular polypill compared with patients treated with the separate monocomponents.
Methods:
Observational, cross-sectional and multicenter study. Satisfaction was evaluated by the Treatment Satisfaction Questionnaire for Medication 9 items, adherence by the Morisky-Green questionnaire and
ad-hoc
questions were asked regarding patient preferences.
Results:
Polypill patients reported higher satisfaction than patients treated with the monocomponents (77.3 vs 71.2%; p < 0.0001). 72.8% of patients treated with the monocomponents would prefer to change to the polypill. Patients treated with the polypill had significantly higher adherence than patients treated with the monocomponents (57.7 vs 41.1%; p = 0.0027).
Conclusion:
Polypill patients show higher satisfaction and better adherence. Most patients receiving the monocomponents would prefer a polypill regime.
ANALYSIS OF THE PRINCIPLES OF REVERSE LOGISTICS IN WASTE MANAGEMENT
Authors: Zatrochová Monika , Kuperová Martina , Golej Július
Published: July 2021

The goal of mentioned contribution is to moderate the unwanted effects of economics on environment in the form of more purposed economy with material sources from recycling, collection, separation and processing of returnable products. It is a global trend nowadays to lower waste production and to minimize effects on the environment. We are going to deal with effectiveness of partly underground containers in Slovakia and new trends about possibilities of other uses of PET bottles. The article deals with the analysis of whether the level of waste management services is at the required level due to the wide range of services provided within reverse logistics. Article’s output is created model of reverse logistics and subsequently analysis of cost effectiveness considering economic aspects entering into the reverse model has been made during its use.
SOLVING THE BOTTLENECK PROBLEM IN A WAREHOUSE USING SIMULATIONS
Authors: Fabianova Jana , Janekova Jaroslava , Horbulak Jozef
Published: July 2021

The uneven workload distribution and working time utilisation create a bottleneck, leading to inefficient utilisation of capacity and increased costs. A bottleneck is a limiting and risk factor for any business entity. In the case of a distribution warehouse, the bottleneck limits its ability to meet the requirements for sending an order within the required time limit. Delays at any phase of a distribution process may result in non-compliance with customer requirements. In solving capacity problems and bottlenecks elimination, computer simulations and optimisation are often used. The article presents a basic simulation analysis of workload distribution and work times, useful for logistics companies, thus for the area of human and financial resources. In the article, the use of simulations in the ExtendSim9 program to eliminate the bottleneck is discussed. The bottleneck is solved by experiments on a simulation model when optimal workers assignment to individual workplaces of the warehouse is sought. The two final proposals for workers allocation, with the current and increased number of workers, are compared in workforce utilisation and system stability. The simulation method allows verification of the proposals' impacts in advance and practically with no financial costs.
IMPACT OF THE PANDEMIC COVID-19 TO CRIMINAL ACTIVITY IN TRANSPORT
Authors: Kubáňová Jaroslava , Kubasáková Iveta
Published: July 2021

2020 has been a year like no other for most of us, dominated by a virus that has cost over 1.15 million lives globally and plunged the world into an economic recession which the Chief Economist of the World Bank says it could take five years to recover from. For business leaders in every sector, over the past six months it has been almost impossible to focus on anything but finding the most sustainable way through this sudden and unexpected crisis – and, for most, it will be hard to think about anything else for a long time to come as they battle to protect the futures of their organisations. Against such a dramatic and damaging backdrop, every business can be forgiven for letting Covid-19 dominate their thinking. They have shareholders to satisfy, customers to support and jobs to protect. Right now, the very survival of companies of every size remains in the balance with no end date in sight to the current crisis. The pandemic has not stopped the crime either, we can eve say that the number of criminal activities has increased. In this article, we want to point out the difference between criminal activity in transport at the beginning of 2019 compared to 2020. The statistics are taken from the international database of criminal activities processed by TAPA EMEA.
POSSIBILITIES OF USING AUGMENTED REALITY IN WAREHOUSE MANAGEMENT: A STUDY
Authors: Husár Jozef , Knapčíková Lucia
Published: July 2021

The presented manuscript points to the possibilities of implementing Smart glasses in warehouse management. With the introduction of augmented reality (AR), it is possible to speed up warehouse employees' processes must ensure significantly. The first part of the article deals with the issue of augmented reality and the object sensing system. The second part is focused on the possibilities of AR in warehouse management to increase productivity. The main part of the study focuses on comparing four systems that operate in distribution centres. The study evaluated and described the benefits of their implementation. Overall, the findings show that the performance of Smart technologies focusing on augmented reality is becoming a novelty in warehousing with significant services for businesses. AR is also pointed out by implementing Industry 4.0 ideas in the concept of creating digital twins of manufacturing companies, which is a current trend.
RAIL DELIVERIES OF BULK OIL CARGOES FROM THE CASPIAN REGION TO EUROPE
Authors: Akhmedov Erjan
Published: July 2021

This article is a study of the current situation with rail deliveries of bulk oil cargoes from the Caspian region to Europe. It addresses the importance of these deliveries for the European energy security, the salient features of rail transportation of crude oil and refined products in this direction, the main transportation routes, and, finally, describes existing and potential problems with rail deliveries of bulk oil cargoes from the Caspian region to Europe and suggests potential resolutions for these problems. In spite of the serious importance of the topic, the overall number of scientific publications related to it is limited. Another problem is that existing scientific literature sources tend to cover general transportation or geopolitical aspects without paying due attention to the rail transportation, logistical problems, related to the current topic, and how to resolve them. The author attempts to fill these knowledge gaps by collecting, processing, and analysing first-hand information from the main market players. The author concludes the article emphasising the importance of the railway transport for deliveries of bulk oil cargoes and pointing out that several important actions are required, namely the actual introduction of a competitive freight market and transition from transport to logistics corridors, support from governments and railway administrations and proactive position of shippers.
MARKETING AND LOGISTICS: FEATURES OF FUNCTIONING DURING THE PANDEMIC
Authors: Al- Ababneh Hassan Ali
Published: July 2021

The need to revise existing approaches and business strategies in logistics was identified in connection with global imbalances in the world economy against the background of the fight against the COVID-19 pandemic. The theory of the organization of marketing activities is considered, a critical analysis is carried out in order to determine the main components of the interaction between marketing and logistics. The lack of a unified approach to organizing effective marketing activities and its interaction with logistics during the COVID-19 pandemic is emphasized. The main components of the marketing concept of doing business have been substantiated. The functional areas of interaction between marketing and logistics in the world during the COVID-19 pandemic have been determined. The classification of the key factors that influenced the transformation of logistics activities in the world has been substantiated. Structural and logical analysis revealed the main trends in the development of the logistics industry in the world. The main tools of scenario economic and mathematical modelling are used to determine the features of the functioning of marketing and logistics during the COVID-19 pandemic and to determine the main trends in their development and interaction. Unlike existing approaches, the proposed one takes into account all the critical influencing factors in the context of COVID-19 and allows you to determine the prospects for the next few years. The main results of the research can be applied in the practical activities of organizations in the formation of development strategies and marketing concepts.
Some notes on the literature on ancient didactic poetry
Authors: Szilágyi Laura Menta
Published: July 2021

The student of ancient didactic poetry has to face a complex web of modern findings and opinions about the genre. This paper attempts to present a few prominent studies from some specific points of view, such as the ways in which they describe the genre (with categorizations and sets of criteria) and in which they delineate ancient views on the genre. The levels of a historical approach and self-awareness in these studies are also examined.
Contextualising Fregellae: Local Interests in a “Globalised” Mediterranean
Authors: Ricci Luca
Published: July 2021

The article employs the Latin colony of Fregellae as a case study to overcome the communis opinio that colonial settlements were parva simulacra Urbis (Gell. XVI.13.9). In particular, the colony, initially founded by Rome in the context of the Second Samnite War, could move away from the Urbs and develop localised interests. Such interests could be explained through a dynamic contact between colonists and local populations, thus forming a variegated social landscape which did not necessarily display cultural similarity with Rome. Similarly, the cityscape could be employed to ascertain how certain colonies chose architectural solutions which took into account localised needs. It is in this context that the article will examine the alliance between Fregellae and Rome in light of the Second Punic War. Traditionally interpreted as a demonstration of blind loyalty, the article will put forth the idea that the colony could decide its alliances in view of potential benefits, which, in the case of Fregellae, were manifested in the economic and military advantages reaped in the eastern Mediterranean. Interestingly, these benefits affected the colony and, more specifically, its architectural facade, as seen in the building activity carried out in the period immediately after the endeavours in the East.
Parallel Phrases and Interaction in Greek and Latin Magical Texts.
Authors: Barta Andrea
Published: July 2021

Magical texts represent an inexhaustible source for the phenomena of an ancient language for special purposes. The scope of this paper is limited to the different kinds of word-borrowings in the Pannonian set of curse tablets. One-language, well written and easily readable magical texts can be difficult to understand while explicit and unambiguous wording is expected in such practical genre like curses which level at definite persons. Harmful curse tablets and protective amulets, however, can be obscure. This study aims to give a comprehensive account of the possible reasons why these texts have a cloudy style, with special outlook of parallel phrases in Greek pieces of evidence.
Frameworks of Reference in the Identification of Latin Dialects
Authors: Gonda Attila
Published: July 2021

Various studies proved that the methodology of J. Herman produces plausible and verifiable results in the field of Latin dialectology, but certain methodological questions remained still unanswered regarding our points of reference in the decision which proportions of the data of the inscriptional faults are classified significant; how to decide on the basis of the proportion of a certain error type if a certain linguistic change was in progress, if it was completed, or if it was not active in the examined territory; which types of errors can serve as base or bases of comparison for a specific examined error type; which periods and territories should be the point of reference in comparisons. In the present study, we attempt to give answers to these questions by running statistical surveys using different points of reference in statistical significance and different bases of comparisons in the error types, and we set up a list of expected results based on the known tendencies of sound changes in Vulgar Latin against which we will measure the actual results of the survey in order to determine which methods were the most effective in meeting the expected picture that we already know about the development of Romance languages.
ABOUT RUSSIAN MENTALITY IN LANGUAGE, SPEECH AND SCIENTIFIC DISCOURSE
Authors: Vladimirova T. E
Published: July 2021

This article is devoted to the disclosure of the mental characteristics of the Russian language personality. Particular attention is paid to the synthetic structure of the language, the nonfixed order of words in the sentence and the category of impersonality, which together create a culturally specific mental context of language, speech and scientific discourse.
Introduction: The Heuristic Value of Social Representations Theory
Authors: Moliner Pascal , Bovina Inna B.
Published: July 2021

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The Notion of Common and Social Representations
Authors: Jodelet Denise
Published: July 2021

The recent emergence of social and political movements calling for common sense and the use of the notion of common in philosophy and social sciences has led to the opening of a reflection on the social and scientific representations concerning them. After having mentioned some political uses of the notions of common sense and common, we examine a notion that is closely associated with them: that of community on which S. Moscovici expresses a reserved position but introduces a new perspective on cybercommunities and the importance attached to affectivity in community groups. The ways of dealing with common sense, identified over time, from antiquity to the present day, highlight certain recurrences from a double perspective. From a typological point of view, several characterizations are distinguished: through simple sharing, through the sameness of moral values and emotional dimensions, through rooting in daily experience, through its devaluation as a form of knowledge in relation to science, through rationality, through its potential for revolt or on the contrary through conformity. From a conceptual point of view, common sense is analyzed as an epistemic characteristic of a group, in its content, formation, transmission, and role in social cohesion. The latest developments in the reflection highlight its link with democracy and populism. The term common of recent appearance is situated opposite the notion of common goods which, after having focused on material realities, now integrates the facts and practices of knowledge, being the subject of a specific domain: the commons of knowledge. The common appears as a new way of approaching social relationships and responds to the desire to introduce a relational, ethical and political dimension into the analysis of social and change processes. In this respect, the call to the common presents affinities with the approach of social representations. The examination of the different scientific and secular representations regarding the notions of community, common sense and common makes it possible to establish connections with the perspective of the study of social representations and to open the way for new investigations.
Social Representations and Individual Representations: What is the Difference? And Why are Individual Representations Similar?
Authors: Lahlou Saadi
Published: July 2021

This paper clarifies a long-standing ambiguity in the notion of social representations; it provides a clear operational definition of the relation between social representation and individual representation. This definition, grounded in the theory of sets, supports most current empirical investigation methods of social representations. In short, a social representation of an object in a population is the mathematical set of individual representations the individuals of that population have for this object. The components of the representation are the components used to describe this set, in intension in the mathematical sense of the term (in contrast with a definition in extension). Statistical techniques, as well as content analysis techniques, can construct such components by comparison of individual representations to extract commonalities, and that is what classic investigations on social representations indeed do. We then answer the question: how come that, in a given culture, individuals hold individual representations that are so similar to one another?