bluuebunny/crossref_metadata_2025 huggingface dataset:
Forandringer i organisatoriske rutiner: Læsevejledning og testning i skolen som eksempel
Authors: Kiær Karina , Albrechtsen Thomas R. S.
Published: August 2020

Formålet med artiklen er at analysere og diskutere, hvordan læsevejledere i danske folkeskoler arbejder med testning iagttaget som en organisatorisk rutine, og hvilken betydning det har for den organisatoriske læring i skolen. Artiklen tager udgangspunkt i et casestudie, hvor fire læsevejledere er blevet skygget og interviewet om deres professionelle praksis. Det empiriske materiale viser, hvordan læsevejledere arbejder rutinemæssigt med at gennemføre og følge op på testning af elever. Vi diskuterer på baggrund af disse fund sammenhængen mellem rutiner og forandringer i skolen med særligt fokus på testning i læsevejledningen og peger på muligheder for fremtidig forskning på området.
English abstract
Changes in organizational routines: Literacy coaching and testing in schools as an example
The purpose of this article is to analyze and discuss how literacy coaches in the Danish Folkeskole work with tests understood as an organizational routine and how this is related to organizational learning. The article is based on a case study in which four literacy coaches were shadowed and interviewed about their professional practices. The empirical findings show how the literacy coaches enact and follow up on the tests as an organizational routine. Based on these empirical findings we discuss how routines and changes are connected in schools, especially focusing on the use of testing in literacy coaching. We also suggest how this can be investigated further in the future.
Frigjørende deltakelse i en forskningssirkel om faget utdanningsvalg
Authors: Røise Petra , Bjerkholt Eva Merete
Published: August 2020

Denne artikkelen handler om hvordan samtalene i deltakerorientert forskning bidrar til å åpne og lukke for frigjørende deltakelse. Deltakerorientert forskning har en demokratisk og emansipatorisk hensikt ved å ta utgangspunkt i deltakernes ulike kunnskaper, erfaringer og praksis. Ny kunnskap utvikles gjennom at deltakerne er villige til å sette sin forforståelse på spill og åpne for ny erkjennelse. Artikkelen tar utgangspunkt i et forskningsprosjekt som illustrerer deltakernes ulike posisjoner, en forskningssirkel hvor deltakerne undersøkte hvordan de kan utvikle sine arbeidsmåter i faget utdanningsvalg i ungdomsskolen. Deltakerne er lærere, karriererådgivere og en forsker. Ved å benytte kontekstuell analyse (Svensson & Doumas, 2013) kombinert med analyse av de fire årsakene (Kindeberg, 2011; Bjerkholt, Ørbæk & Kindeberg, 2020) blir det synliggjort hvordan alle deltakerne, inkludert lederen av forskningssirkelen, setter sin forforståelse i spill gjennom en kritisk-dialogisk prosess. Det diskuteres hvilken betydning kritisk-dialogiske prosesser kan ha i organisasjoners læring.
English abstract
Emancipatory participation in a research circle concerning the subject Educational Choice
This article is about how, in participant-oriented research, conversations help to open up, or close off, emancipatory participation. Participant-oriented research has both a democratic and emancipatory purpose, and is based on the varied knowledge, experience, and practical work of the participants. New knowledge is developed when participants are willing to lay their preconceived ideas on the line, opening the way to new insights. This article is based on a research project that illustrates the different positions of the participants, a research circle in which participants explored how they can develop their working approach to the subject Educational Choice in lower secondary school. Participants were teachers, career counsellors, and a researcher. Using contextual analysis (Svensson & Doumas, 2013), combined with an analysis of the four causes (Kindeberg, 2011; Bjerkholt, Ørbæk & Kindeberg, 2020), it becomes clear how all participants, including the leader of the research circle, lay their preconceived ideas on the line through process involving critical dialogue. The article discusses the importance of processes involving critical dialogue in organizational learning.
Editorial: Geoquímica y perspectiva ambiental de sistemas exógenos
Authors: Carol Eleonora , Tanjal Carolina
Published: August 2020

El presente dossier de la Revista del Museo de La Plata reúne nueve de los artículos presentados en la V RAGSU, los cuales abordan distintas especialidades dentro de la geoquímica de la superficie.
Geohidrología de un sector de la marisma de Bahía San Blas
Authors: Misseri Lucas , Cellone Francisco, A. , Bouza Pablo, J. , Alvarez María del Pilar , Carol Eleonora, S.
Published: August 2020

La marisma del arroyo Jabalí forma parte de la Reserva Natural Provincial de Uso Múltiple Bahía San Blas y se encuentra ubicada al sudeste de la provincia de Buenos Aires, Argentina. El objetivo del trabajo es analizar los principales procesos geohidrológicos que regulan la química del agua superficial y subterránea de este humedal y su relación con las características geomorfológicas y pedológicas. Para ello se realizó una caracterización geomorfológica en base a la cual se diseñó una red de monitoreo del agua superficial y subterránea. Se construyeron 14 freatímetros a lo largo de 3 transectas perpendiculares al arroyo y se recolectaron muestras de agua en las que se analizó in situ el pH y la conductividad eléctrica y se determinó en laboratorio el contenido de iones mayoritarios. Los datos fueron analizados mediante gráficos de relaciones iónicas y diagramas de clasificación de aguas. A su vez en cada sector estudiado se efectuaron calicatas para la descripción de los perfiles del suelo y características texturales de los sedimentos superficiales. Los resultados obtenidos muestran que tanto la química del agua del canal Jabalí como la subterránea de la marisma son dominantemente cloruradas sódicas, existiendo un enriquecimiento en el contenido iónico asociado a una mayor distancia con respecto a la boca del canal y una posición topográfica más elevada. El principal proceso que condiciona la química del agua subterránea es la disolución de especies minerales formadas en la superficie de los suelos por evaporación del agua de mar y la posterior incorporación en el acuífero por infiltración. Estos procesos se ven favorecidos por el clima semiárido, la menor recurrencia de inundación por posición topográfica elevada, y por la textura fina de los suelos. A su vez, la oxidación de sulfuros pedogenéticos y la consecuente acidificación del medio son propuestos como otros mecanismos que condicionan la química del agua.
Caracterización físico-química y biológica de sedimentos marino costeros, sujetos o no a actividades antropogénicas (Golfo Nuevo, Patagonia argentina)
Authors: Ferrando Agustina , Sturla Lompré Julieta
Published: August 2020

El impacto causado por las embarcaciones en los puertos es un problema a nivel mundial debido al tráfico marítimo y el vertido de aguas residuales con un alto contenido orgánico. El objetivo de este trabajo fue caracterizar un sitio afectado crónicamente por actividades portuarias (Muelle Luis Piedrabuena-MLP) y otro sin signos de impacto antrópico (Cerro Avanzado-CA). Para ello, se colectaron muestras de sedimento (n=3) con un corer (diámetro: 11 cm, altura: 15 cm) y se realizó la determinación de parámetros físico-químicos in situ en el agua adyacente. Las columnas sedimentarias fueron fraccionadas en tres secciones (0-2 cm; 2-4 cm y 4-10 cm). Los resultados granulométricos indicaron un predominio de la fracción limo fino-medio en MLP y de arena muy fina en CA. A su vez, se registraron mayores porcentajes de humedad y materia orgánica en MLP cerca de la superficie (46,7±4,1% y 2,8±0,2% versus 27,0±1,0% y 1,2±0,3% en profundidad, respectivamente), mientras que en CA la distribución de estos parámetros fue homogénea (28,5±1,2% y 1,5±0,1%, respectivamente). Con respecto a los análisis biológicos, la clase Polychaeta fue la más abundante en ambos sitios, seguido de Amphipoda en MLP y Bivalvia en CA. A su vez, la mayor abundancia de organismos fue registrada en los primeros 2 cm de la columna sedimentaria en ambos sitios. Los resultados constituyen una línea de base que podrá ser utilizada en estudios ecotoxicológicos y de monitoreo en Patagonia o en otros ambientes con características ecológicas similares.
BAURAN PEMASARAN DAN SHARIA COMPLIANCE TERHADAP LOYALITAS PELANGGAN
Authors: Syarifuddin Ahmad Dzul Ilmi , Mahesa Akramunnas
Published: August 2020

This study adds to the influence of marketing mix and sharia compliance on customer loyalty of Avansa cars at PT. Haji Kalla Alauddin Branch who purchases through Islamic financing. 100 samples were selected using purposive technique. Data were analyzed using multiple regression. the results of the study concluded that the marketing mix: product, price, promotion, and location and sharia compliance partially influenced the customer loyalty of Avansa cars at PT. Haji Kalla Alauddin Branch who purchases through Islamic financing. The marketing mix and Sharia Compliance partially influence the customer loyalty of Avansa cars at PT. Haji Kalla Alauddin Branch who purchases cars through Islamic financing.
Is PBFD Simptomatology Species Specific Rather then Strain Specific? – A Case of 8 Lovebirds
Authors: Vučićević Miloš , Vučićević Ivana , Došenović Milan , Ristanić Marko , Aleksić Nevenka , Resanović Radmila , Stanimirović Zoran
Published: August 2020

Eight lovebirds of both sexes and different age were admitted showing alterations in behaviour and apathy. During the initial examination delamination of the beak was noted in all birds and discrete areas of alopecia in three of eight birds. Based on clinical experience, molecular diagnostic on PBFD, sequencing of obtained amplicons, and histopathological examination were performed. All birds tested positive on the presence of PBFD virus, despite the fact they did not exhibit expected clinical signs for PBFD. Sequencing results showed 100% match with sequences previously isolated from parrots with PBFD exhibiting classical PBFD manifestation. Histopathological examination showed similar findings as in previously described cases of PBFD in parrots. Other studies on psittacine birds correlate clinical manifestations and nucleotide variations with geographic localization. Our results indicate that the clinical manifestation of the disease is more dependent on bird species than on the genetic variation of the virus or the geographical distribution.
Some new inequalities for convex functions via Riemann-Liouville fractional integrals
Authors: Gürbüz Mustafa , Yıldız Çetin
Published: August 2020

Fractional analysis has evolved considerably over the last decades and has become popular in many technical and scientific fields. Many integral operators which ables us to integrate from fractional orders has been generated. Each of them provides different properties such as semigroup property, singularity problems etc. In this paper, firstly, we obtained a new kernel, then some new integral inequalities which are valid for integrals of fractional orders by using Riemann-Liouville fractional integral. To do this, we used some well-known inequalities such as Hölder's inequality or power mean inequality. Our results generalize some inequalities exist in the literature.
The use of Gage R&R in suitability analysis of a CMM used at FAMOT Pleszew
Authors: Michalski R. , Wieczorowski M. , Gapiński B. , Glazowski P.
Published: August 2020

The subject of the article is the suitability analysis of a measuring system, specifically the Zeiss MMZ T 20 30 16 coordinate-measuring machine utilizing an extended procedure.

The article outlines the measurement preparation process and presents the research station as well as the procedure for determining Repeatability & Reproducibility (R&R).
Parametric study of friction stir welding using elastic return
Authors: Serier Mohamed , Berrahou Mohamed , Chikh Amina
Published: August 2020

Aluminum alloy is a very useful material in light manufacturing. Friction stir welding (FSW) is a solid state assembly process that is achievable for this material. This work aims to characterize the quality of the weld joint by an operation of shaping (folding), it aims to study the rate of elastic return in this weld joint after a folding operation. In this context, the elastic return for the folding process has been modeled using experimental tests under optimal welding conditions.
Wild Rosa L. and Crataegus L. taxa of the Middle Noteć River Valley (NW Poland)
Authors: Sołtys-Lelek Anna , Gruszka Wojciech
Published: August 2020

This paper presents a study on the distribution of hawthorns and wild roses of the Middle Noteć River Valley region in north-west (NW) Poland. The main purpose of the study was to provide a full list of wild Crataegus and Rosa taxa growing in the examined area. Field studies (2016-2017) and formerly published data, made it possible to recognize 10 taxa (including one rose hybrid within the rank of species). Four new taxa were found in the explored area during studies. These were: Crataegus rhipidophylla Gand., C. ×macrocarpa Hegetschw., C. ×subsphaericea Gand. and Rosa ×subcanina (H. Christ) Vuk.
Tests on the Mechanical Properties of Polymers in the Aspect of an Attempt to Determine the Parameters of the Mooney-Rivlin Hyperelastic Model
Authors: Śliwa-Wieczorek Klaudia , Zając Bogusław , Kozik Tomasz
Published: August 2020

The article presents testing of the mechanical properties of SIKA® polymer adhesives of the type PBM, PMM, PM, and PSM in the aspect of an attempt to determine the parameters of the Mooney-Rivlin hyperelastic model. The article contains a literature review on developed models for hyperelastic materials as well as a description of the author’s own results obtained in monaxial tensile and monaxial compression tests conducted on oars and cylindrical samples, respectively. Furthermore, the results of modeling of Mooney-Rivlin hyperelastic model parameters are shown in relation to the value of average parameters for polymers after both a week and a month-and-a-half of ripening.
Numerical Simulations of Ductile Fracture in Steel Angle Tension Members Connected with Bolts
Authors: Bernatowska Edyta
Published: August 2020

The aim of the paper is to verify and present methodology for ultimate tensile resistance prediction in steel angle tension members connected to gusset plates with one row of bolts. After a description of the experimental investigations, the next step was to build numerical models. The subjects of the experiments consisted of single plate specimens with drilled holes and angles connected to gusset plates with 1, 2, 3, or 4 bolts. Close attention was given to choosing the appropriate material model, which takes into account the influence of microstructural damage and the process of ductile fracture initiation and propagation. The porous Gurson-Tvergaard-Needleman material model was analysed and the paper focuses on hierarchical validation of numerical models of steel angle bolted connections, which will then be used for parametric studies.
Expression of Glued Laminated Timber in Long Spans Structures Associated with its Natural Origin
Authors: Maciejko Alicja
Published: August 2020

The article presents an analysis of the possibilities of shaping long - span structures using the expressive force of glued laminated timber related to its natural origin. Changes that arose in the 20th century and at the beginning of the 21st century under the influence of new technological possibilities in the field of woodworking, as well as radical changes in the doctrine of environmental protection, also changed the position of timber as an innovative construction material. Recent developments are considered groundbreaking. Timber is used both in large span structures as well as for the construction of multi-storey buildings, which opens the door for shaping new architectural forms. The principles of girder modelling and features related to timber symbolism were presented.
Digital Analysis of Geo-Referenced Concrete Scanning Electron Microscope (SEM) Images
Authors: Ahamad Mohd Sanusi S. , Maizul Elly Nur Myaisara
Published: August 2020

The microstructural evaluation of complex cementitious materials has been made possible by the microscopic imaging tools such as Scanning Electron Microscope (SEM) and X-Ray Microanalysis. Particularly, the application of concrete SEM imaging and digital image analysis have become common in the analysis and mapping of concrete technology. In this study, six samples of two-dimensional (2D) SEM images were spatially resampled to produce Geo-referenced SEM sample images. Subsequently, they were analyzed and the intensity histogram plot was produced to facilitate visual interpretation. The consecutive digital image analysis performed was the enhancement and noise removal process using two filtering methods i.e. median and adaptive box filter. The filtered resampled images, then undergone the unsupervised K-Means classification process to collectively separate each individual pixel corresponds to the spectral data. By spatial segmentation of K-Means algorithms, the cluster groups generated were carefully reviewed before proceeding to the final analysis. From the resulting data, the mapping of the spatial distribution of k-cluster and the quantification of micro-cracks (voids) were performed. The results of the SEM images (1st - 4th sample) showed a higher percentage of k-cluster data indicating a good correlation with the major elemental composition of EDX analysis, namely Oxide (O), Silicon (Si) and Carbon (C). Meanwhile, the subjective visual assessment of the image (5th and 6th sample) has confirmed the micro-crack developments on the concrete SEM images upon which the crack density was 3.02 % and 1.30 %, respectively.
The Problem of Moisture Content in Historical Buildings Based on a Classicist Tenement House at 14A, Śląska Street in Gubin
Authors: Michalak Bartosz , Graczyk Oliwia
Published: August 2020

Diagnostics and mitigation of excessive moisture effects are some of the most frequent problems in historical buildings. In this article, an attempt was made to measure the moisture content of construction elements in the historical tenement house in Gubin. It is the largest town in the Krosno Poviat, in the area of the Lubuskie Voivodeship. The town suffered from military actions during World War II whereby approximately 90% of its urban development was destroyed. The tenement house at 14A, Śląska Street is one of the more well-preserved buildings, made in the classicist style with characteristic historical features. The whole history of the building is unknown but there are freemasonry symbols on the elevation, and probably the Military Police had its headquarters there after 1945.
Socio–Economic Analysis of Riverine Flooding on Low-Income Dwellings: Adayar River, a Case Study
Authors: Saravanan Suriya , Basavaraj Mudgal , Nelliyat Prakash
Published: August 2020

Flood damage assessment plays a vital role in providing information to policy developers. Nowadays, due to urbanization, the impact of flooding on communities is extensive, including tangible damage to property, the environment, and infrastructure as well as intangible damage due to stress, health hazards, and hardship. This paper provides an overview of a detailed flood assessment study conducted in the Kotturpuram Housing board area, located on the flood plain of the Adayar River in Chennai, India. A relatively simple approach to data collection was adopted, being a Questionnaire Survey (QS) as well as semi-structured interviews and observation techniques, due to data and research limitations. Losses due to damage to belongings and extra spending to buy essential commodities during flooding are also dealt with in this study. The flood mitigation costs for flooding that occurred in the year 2015 are also evaluated. A stage-damage curve was arrived at based on the information collected. Optimal and sustainable mitigation measures can be achieved only when the socio-economic aspects are adequately considered. Thus, this analysis was designed to estimate the effects of flooding on a community’s social and economic welfare, and thereby help to educate the community, including residents and officials, about the impact and magnitude of flooding. The outputs of the study will be the key inputs for designing flood mitigation and relief measures.
Estimation of Rubber Waste Concrete Properties by Ultrasonic Velocities: Effect of Transducers’ Diameters and Frequencies
Authors: Boudjedra Fatiha , Benouis Abdelhalim , Boudaoud Zineddine
Published: August 2020

This experimental study aimed to use the ultrasonic pulse velocity method (UPV) in order to investigate the effect of rubber tire waste content and transducers’ diameters and frequencies on the evolution of ultrasonic velocities in time and to elucidate the correlations between UPV and the properties of various concrete mixtures. The incorporation of this waste involved volume substitution (0, 5, 10, 15 and 20%) of fine aggregates (sand) by rubber waste (RW) granulates. The dry unit weight, porosity, compressive and flexural strengths, and velocity of ultrasonic waves with different transducers - which presents the non-destructive technique - were evaluated. Rubberized concrete mixtures showed increases in porosity with lower dry unit weight compared to the control concrete. Compressive strength, flexural strength and ultrasonic velocity obtained by all transducers decreases with increasing RW content. These decreases are not influenced by the curing age of concretes. Decreases in the diameter and frequency of transducers caused reductions in ultrasonic velocity. These reductions are not influenced by the volume replacement of sand by RW. Correlations showed that ultrasonic velocity represents a reliable non-destructive technique for measuring the properties of rubberized concretes.
Application of the Bayesian Networks in Construction Engineering
Authors: Leśniak Agnieszka , Janowiec Filip
Published: August 2020

Currently, significant development of methods supporting decision making under uncertainty conditions is observed. One of such methods includes Bayesian networks used in many fields of economy and science. The paper presents the use of the Bayesian network method in civil engineering problems with particular emphasis on construction engineering projects. In addition to the existing examples of the use of the method cited, the authors’ method for the risk estimation of additional works is presented.
Pollination Efficiency of Managed Bee Species (Apis mellifera and Bombus pauloensis) in Highbush Blueberry (Vaccinium corymbosum) Productivity
Authors: Cavigliasso Pablo , Bello Fernando , Rivadeneira Maria Fernanda , Monzon Nicolas Oscar , Gennari Gerardo Pablo , Basualdo Marina
Published: August 2020

Understanding how bees use the resources provided by crops of massive flowering is essential to develop meaningful agricultural management of plans to maximize the potential of pollination service. We assessed the effect of the pollination carried out by native species Bombus pauloensis and Apis mellifera on the production and quality of blueberry fruits. In this context, we tested the prediction that pollinator assemblages benefit fruit yield. Four treatments were performed: open pollination, B. pauloensis pollination, A. mellifera pollination, and autogamy. For each treatment, the frequency of floral visitors, fruit setting, yield, and quality were evaluated. The results showed that Vaccinium corymbosum L. ‘Emerald’ is highly dependent on entomophilous pollination to obtain optimal production and high-quality fruit, and that pollination with A. mellifera generated the highest proportion of fruit setting (0.80 ± 0.03). The highest seed number was found in open pollinated fruits. This study highlights the effect of the interactions among wild and managed pollinators on the productivity of commercial blueberry fields, and is the first report of B. pauloensis use in blueberry pollination.
Improved Yield, Fruit Quality, and Shelf Life in ‘Flame Seedless’ Grapevine with Pre-Harvest Foliar Applications of Forchlorfenuron, Gibberellic Acid, and Abscisic Acid
Authors: Khalil Hoda A.
Published: August 2020

The effect of gibberellic acid (GA3), forchlorfenuron (CPPU), and abscisic acid (ABA) on the parameters of yield of ‘Flame Seedless’ grapes was investigated. The clusters of 8-year-old grapevines were sprayed with solutions: GA3 at 25 mg·dm−3, CPPU at 10 mg·dm−3, and ABA at 300 mg·dm−3, alone or in combinations. GA3 and CPPU treatment increased yield, cluster weight and length, berry weight and diameter, as well as fruit firmness, but reduced the total soluble solids (TSS) and intensity of berry color. Anthocyanin content of berries treated with GA3 and CPPU increased significantly by ABA treatment. Shelf life was increased by GA3 and CPPU treatments, as they decreased the percentage of weight loss, shattering, and unmarketable berries after storing at 20 °C for 7 days. Thus, it can be concluded that the combined use of GA3, CPPU, and ABA may be an efficient practice for fruit enlargement, coloration, and keeping quality in ‘Flame Seedless’ grape.
The Existence of Deuterotokous Reproduction Mode in the T. tabaci (Thysanoptera: Thripidae) Cryptic Species Complex
Authors: Woldemelak Wondimagegn Atilaw
Published: August 2020

The present study aimed to investigate whether adult males could fertilize immature female pupae in the leek (L1) and tobacco-associated (T) Thrips tabaci lineages and to investigate the potential effects of mother to son inbreeding on the appearance of deuterotokous females in the T lineage. To confirm the pupal insemination, a single female pupa was exposed to a single adult male for 24 hours. The removal of a male from the tube that contained the female pupa was made before the female pupa emerged to adulthood. Emerged female adults were isolated and reared individually and the sex of their progeny was determined in the larval stages. To examine a mother and son inbreeding, a single female adult was exposed to her son for 48 hours, and for two consecutive generations, the mode of reproduction was determined by identifying the sex of the progeny. This result showed that pupal insemination was not successful; thus, all the tested females produced only male progeny. Virgin inbred females produced both male and female progeny that refers to deuterotokous reproduction mode. Three virgin females produced a total of 20 females and 75 males in two consecutive generations. A study concluded that deuterotokous mode of reproduction is not a persistent mode of reproduction in the T lineage but is a result of irregularity in the mode of reproduction, and it might be changed because of brother and sister inbreeding and need further studies.
Effects of Led Supplementary Lighting and NPK Fertilization on Fruit Quality of Melon (Cucumis melo L.) Grown in Plastic House
Authors: Kramchote Somsak , Glahan Somchai
Published: August 2020

Melon (Cucumis melo L.) is a high-value fruit in Thailand, usually grown in plastic houses where light could become a major limiting growth factor. This study used melon cultivar ‘#120’ (orange flesh) grown in a plastic house under natural daylight (NDL, control) and with supplementary lighting using light emitting diodes (LEDs) of a combination of red 630 nm, red 660 nm, blue 450 nm, blue 460 nm, white 14000 K, UV 410 nm and IR 730 nm (LED1) or a combination of red 630 nm, red 660 nm, blue 450 nm and blue 460 nm (LED2) applied for 12 h from 6:00 pm to 6:00 am. These lighting treatments were combined with NPK fertilization using complete fertilizer 15–15–15 (N–P2O5–K2O) at 5 g, 7 g (recommended rate) or 9 g per plant. Results showed that LED2 combined with 9 g 15–15–15 was the most effective in increasing plant height, chlorophyll content (SPAD index), fruit size and mass, and peel and flesh thickness. The fruit also developed the desired lighter color (higher L* and lower a* coordinates) and were the firmest and sweetest (highest soluble solids content and lowest titratable acidity) among all treatments.
Ensuring Equal Bandwidth for Remote Connections to the Local Company Server
Authors: Muc Adam , Muchowski Tomasz , Kluczyk Marcin , Szeleziński Adam
Published: August 2020

Creating the required IT infrastructure to enable the ability for comfortable remote working is not an easy task. Improper configuration can create the possibility of taking over the whole bandwidth of the link by one device. Increasing bandwidth introduces extra costs and does not completely eliminate the problem – it will be more difficult to take over the whole bandwidth, but it is still possible. The solution to the problem may be the use of clouds and VPS, but it is associated with high costs and the need to entrust company data to providers of these services. Due to security and too high costs, this may not be an optimal solution. An alternative solution may be to use QoS along with PCQ. This mechanism allows to ensure equal division of the bandwidth between the devices under its control. With an appropriate configuration, QoS can eliminate the problem of taking over the whole bandwidth and ensure equal access to resources.
Recovery of Metals from Printed Circuit Boards By Means of Electrostatic Separation
Authors: Franke Dawid , Suponik Tomasz , Nuckowski Paweł M. , Gołombek Klaudiusz , Hyra Kamila
Published: August 2020

Without the use of appropriate recycling technologies, the growing amount of electronic waste in the world can be a threat to the development of new technologies, and in the case of improper waste management, may have a negative impact on the environment. This is due to the fact that this waste contains large amounts of valuable metals and toxic polymers. Therefore, it should be recycled in accordance with the assumptions of the circular economy. The methods of mechanical recovery of metals from electronic waste, including printed circuits, may be widely used in the future by waste management companies as well as metal production and processing companies. That is why, a well-known and easily applicable electrostatic separation (ES) method was used to recover metals from printed circuit boards. The grain class of 0.32 - 0.10 mm, obtained after grinding the boards, was fed to a separator. Feed and separation products were analyzed by means of ICP-AES, SEM/EDS and XRD. The concentrate yield obtained after electrostatic separation amounted to 32.3% of the feed. Its density was 11.1 g/cc. Out of the 91.44% elements identified in the concentrate, over 90% were metals. XRD, SEM observations and EDS analysis confirmed the presence of non-metallic materials in the concentrate. This relatively high content of impurities indicates the need to grind printed circuit board into grain classes smaller than 0.32-0.10 mm.
Recovery of Fine Coal Grains from Post-Mining Wastes with Use of Autogenous Suspending Bed Technology
Authors: Kowol Daniel , Kurama Haldun
Published: August 2020

In addition to rock waste post-mining waste dump sites also contain coal grains justifying treating the dump sites as secondary mineral deposits. The article presents the results of laboratory tests aimed at determining the possibility of using suspending bed technology to separate a combustible substance from post-mining waste of a 4-0 mm grain size. The test results showed the possibility of obtaining good quality coal concentrates from coal waste of a grain size of 4-1 mm. The need for desludging and densifying the feed for the classifier with an autogenic suspending bed in the case of coal waste beneficiation in a wide 4-0 mm grain size justifies the use of a two-chamber device or two separate classifiers for narrower grain size classes. Concepts of systems for the recovery of fine coal grains providing the use of the classifier with autogenous suspending bed for the density distribution of feeds with high ash content are presented. The concepts were developed for beneficiation of the material in a 4-0 mm grain class.
The Method of High Accuracy Calculation of Robot Trajectory for the Complex Curves
Authors: Lozhkin Alexander , Bozek Pavol , Maiorov Konstantin
Published: August 2020

The geometric model accuracy is crucial for product design. More complex surfaces are represented by the approximation methods. On the contrary, the approximation methods reduce the design quality. A new alternative calculation method is proposed. The new method can calculate both conical sections and more complex curves. The researcher is able to get an analytical solution and not a sequence of points with the destruction of the object semantics. The new method is based on permutation and other symmetries and should have an origin in the internal properties of the space. The classical method consists of finding transformation parameters for symmetrical conic profiles, however a new procedure for parameters of linear transformations determination was acquired by another method. The main steps of the new method are theoretically presented in the paper. Since a double result is obtained in most stages, the new calculation method is easy to verify. Geometric modeling in the AutoCAD environment is shown briefly. The new calculation method can be used for most complex curves and linear transformations. Theoretical and practical researches are required additionally.
New Implementations of Komag Jigs for Coking and Steam Coal in Collaboration with Carbo-Eco and Fugor Companies
Authors: Matusiak Piotr , Gondek Horst
Published: August 2020

The basic process of minerals’ mechanical preparation, including coal, is a beneficiation process which has a decisive impact on quantitative-and-qualitative parameters of commercial products. At present the products of the MBE-CMT, Allmineral and Tenova companies have big market shares as regards foreign water pulsatory jigs, as well as ITG KOMAG on the local Polish market. New implementations of jigs, developed at the KOMAG Institute of Mining Technology, for beneficiation of coking coal and steam coal in collaboration with Carbo-Eco Ltd. and Fugor Ltd. companies, were realized in 2019. Technical and technological parameters of new devices are described in the article. Supply systems of feed are presented as well as the method of collecting tailings and middlings. New design solutions, applied in modernized preparation plants, aimed at an improvement of jigs production capacity and efficiency are presented. In the case of each jig, after its activation and conducted adjusting processes, exact tests of a beneficiation efficiency were performed and their results are presented in the tabular form. Basic beneficiation accuracy indicators and parameters of products’ separation as well as balances of products are given. The test results, obtained from newly activated jigs, are discussed.
Trenchless Execution of Microtunnels for Municipal Infrastructure in Urbanized Site – Conception of a New Solution
Authors: Kotwica Krzysztof , Suffner Hubert , Andras Andrei
Published: August 2020

The technologies for trenchless execution of mini and microtunnels for an installation of municipal infrastructure in urbanized sites, used at present, are described in the article. The emphasis is laid on uncontrolled methods, in the case of the diameters of installations which do not exceed 200-250 mm and their length not bigger than 30-40 m. Some issues connected with making the installations of this type, using conventional methods, are also presented. A conception of equipment (ground rocket) for an trenchless execution of short-distance microtunnels of the diameter up to 200 mm and the length up to 30 m with an innovative electric drive, developed at the Department of Machinery Engineering and Transport of the AGH in Cracow as an alternative for the solutions applied nowadays, is described. An electric linear motor, whose conception is presented in the article, was installed in the head of the device. The goal of these works was possibility of using new solution of ground rocket without additional equipments for pneumatic supply with compressed air. New concept of proposed ground rocket can be used with feeding directly from the domestic electric network. The device is intended for execution of installation in incoherent and low-compact ground.
Maximizing the Productivity of a Gas Melting Furnace with Regard to the Ecological Efficiency of its Operation
Authors: Straka Ľuboslav , Piteľ Ján , Michalík Peter , Hrabčák Matej
Published: August 2020

Due to the implementation of environmental regulations and the continual tightening up of the limits for pollutants in combustion systems, we are being forced to pay more attention to this area. A significant source of pollutants originating from the industry is, in particular, the formation of carbon dioxide (CO2) and nitrogen oxides (NOx) in combustion systems with air intake. The control of pollutant emissions has become a global concern due to the worldwide increase in the use of fossil fuels. Besides the fact that the insufficient combustion process has a significant share of emissions in the environment, it also reduces the overall efficiency and economy of the operation using this energy source. We encounter this problem also in the operation of gas melting furnaces. Therefore, the aim of this paper was to describe the results of experimental measurements of the amount of emissions produced during the gas melting furnace KOV 010/1998 operation, which is in practice predominantly used for the melting of Aluminium alloys. Experimental measurements were performed to design the most appropriate operating mode variant of the melting furnace with regard to maximizing its productivity and at the same time to minimizing the total amount of emissions produced during one melting cycle.
Gas Flow Simulation in the Working Gap of Impulse Gas-Barrier Face Seal
Authors: Kuznetsov Eduard , Nahornyi Volodymyr , Krenický Tibor
Published: August 2020

Numerical simulation method of the working process of a centrifugal unit contactless face impulse seal is proposed. A seal functioning physical model was created. Its operation key aspects that are not taken into account in the traditional methods of calculating contactless impulse seals are identified. A numerical simulation of seal working process based on the Reynolds equation solution for the medium vortex-free motion in the gap between moving surfaces is proposed. Hypothesis that simplify the equation’s numerical solution for the face impulse seal is formulated. The numerical solution is obtained using the boundary element method. Based on the obtained numerical solution, the distribution of the working medium pressure field in the seal gap is simulated.
Enhancing Efficiency by Implementation of Integrated Management System in Order to Align Organisational Culture and Daily Practice
Authors: Zaloga Viliam , Dyadyura Konstiantyn , Rybalka Iryna , Pandova Iveta , Zaborowski Tadeusz
Published: August 2020

The main aim of presented article is present methodology how sophisticated products as compressor equipment can be considered and analyzed as a complex technical system which consists of jointly operating components – a set of hardware, software, operational staff and documented information. In process modeling, these components can be in different processes of inputs, outputs, mechanisms (resources) or management. Based on the regulatory requirements for each component of the system, a key indicator efficiency can be identified. This will allow to control the process and make appropriate decisions to improve the system. The application of the proposed methodology for the development and implementation of an integrated management system reduce the cost of resources and significantly improve the quality of the implementation of processes.
Economic Impact of Industrial Segment in the Selected Country
Authors: Grešová Elena , Svetlík Jozef
Published: August 2020

The inducted paper discusses economic effect resulting from industrial activities realized within national economy of the chosen country. The country of selection represents Poland. Economic impact is scrutinized through reflexing on gross domestic product. Industrial segment is deputized over various indicators whose scope strives to include different views on the industry field. The main point of this paper is to identify the exact relationship between dependent variable (gross domestic product) and a group of independent variables (picked industrial representatives). Such determination offers thereafter the possibility to estimate dependent variable’s value and its next forecast. What is more, the eventual sorting of involved industrial indicators is facilitated according to their importance. The multiple regression analysis is utilized as the method of investigation. Findings answer the stated questions and aims with a suggestion of an appropriate equation.
ZnO Coatings on Ti6Al4V Substrate: Structural and Antibacterial Properties in Literature Review and Research
Authors: Sukhodub Leonid , Sukhodub Luidmila , Kumeda Mariia , Panda Anton , Baron Petr
Published: August 2020

ZnO, ZnO/Alginate coatings were obtained on the pre-anodized Ti6Al4V substrates by the thermal substrate deposition method (TSD). In the frame of this work, the TSD method was at first applied for obtaining ZnO coating from aqueous alginate-containing and alginate-free solutions on a metal surface. XRD, SEM analyses show that the biopolymer has a significant influence on the formation of the coating, their morphology, texture, structure of ZnO nanoparticles. The average rate of ZnO deposition from alginate containing solution is 30 μm/min, while from alginate-free solutions – 6 μm/min. In the presence of alginate, spherical particles with flower-shaped inclusions are formed, while from the polymer-free solution, single crystals in the form of tetrahedral were obtained. Zone of inhibition test against Gram-positive S. aureus ATCC 25923 and Gram-negative E. coli ATCC 25922 proves the antibacterial activity of the ZnO/Alg coatings.
Transformation of the wastewater sector – The ability of state level controlling mechanisms to enhance the implementation of resource-oriented sanitation systems
Authors: Wolf Mario , Londong Jörg
Published: August 2020

New sanitary systems are an intelligent way to approach wastewater management in the face of demographic and climatic changes. It is also compatible with the emerging paradigm of a resource-oriented management of wastewater. While the general technical applicability of resource-oriented systems has been proven in various projects, the realisation is still on hold. The reasons can be found in several risks for wastewater disposal companies that are linked to the implementation process. Based on an analysis of the general context of an implementation of a new sanitary system in a typical rural area of Eastern Germany, this paper analyses to which extend the implementation of such innovative approaches can be facilitated by the regulation system and which steps need to be taken. According to this aim, risks that can hamper the transformation of the wastewater sector are identified, major administrative controlling mechanisms outlined and depicted in which strategic approach these could be used in order to foster the implementation of resource-oriented sanitary systems. As a result, the feasibility of the implementation of new alternative sanitary systems through the strategic application of the controlling mechanisms is generally proven. However, collaborations of the wastewater sectors with stakeholders of other sectors are required.
Use of Trigger Points Therapy for cervical spondylarthrosis with aggravated symptoms of Varicella-Zoster virus infection - Case Report
Authors: Vutan Ana Maria , Pantea Corina
Published: August 2020

Introduction. There are only few articles in the literature that discuss or present the complications that occur after primary infection with Varicella-Zoster Virus. Most studies present the complications after the virus reactivates in people with shingles. Their approaches shows only the immediate medical perspective and not the intervention on the remaining of sequelae. The varicella-zoster virus can affect both children and adults, and the most effective way to prevent it is to administer the vaccine.

Aim. The purpose of this paper is to present the case of a 28-year-old young male who had a first infection with the Varicella-Zoster virus and he developed a series of symptoms (migraines, vertigo, tinnitus, insomnia, anxiety) that have seriously affected his quality of life.

Method. The Visual Analogue Scale of pain (VAS),Neck Disability Index-Vernon and Mior Cervical Spine Questionnaire (NDI) were used in the case assessment. As established treatment, Trigger Points Therapy, myofascial stretching (15 sessions) and physical therapy (10 sessions) were performed.

Results. Following the initial, intermediate and final evaluation, there was a marked decrease in the value of the VAS scale as well as the value of the DNI questionnaire, which represents the decrease of pain and increase of quality of life.

In conclusion, Trigger Points Therapy and myofascial stretching along with exercise can significantly reduce migraine pain and can help eliminate other symptoms such as tinnitus, vertigo, adynamism, even though, they occurred secondary to a viral infection.
Study regarding the main ways of gaining ball possession in Romanian basketball
Authors: Ionescu Dan , Alexandru Mihai , Gui-Bachner Gabriela , Molcuţ Alin
Published: August 2020

Introduction: In basketball, ball possession can begin and end in many different ways, for example, ball possession may begin with an out-of-bounds, a stolen ball, a rebound etc, and may also end with a throw, a turnover or when the attack time has expired.

Aim: Starting from the working hypothesis that the backboard rebounds represent an important factor in gaining ball possession, we have proposed to identify and analyze the game parameters recorded in the national basketball leagues.

Material and methods: The theoretical documentation included explaining, based on specialized literature, terms related to ball possession. Also, in order to accomplish the purposes of this research, we have used statistical analysis (possession, arithmetic mean, amplitude) and graphical representation. This study focused on all teams participating in the 2019-2020 season of the National Basketball Leagues (16 men’s and 13 women’s teams).

Results: Following the analysis and centralization of the game parameters from the 146 games played in the men’s league and 144 games in the women’s league, we have identified the main ways of gaining ball possession.

Conclusions: Backboard rebounds represent the main way of gaining ball possession (which confirms the hypothesis).
Laterality and general intelligence in children aged 6 – 8 years
Authors: Arseni Nada , Hanţiu Iacob
Published: August 2020

Aim: The aim of this study was to identify and analyze the types of laterality and level of general intelligence in primary school children, aged six to eight years.

Methods: The sample consisted of 120 students, both boys and girls. General intelligence was measured using Raven’s Coloured Progressive Matrices (CPM), while laterality was assessed using the Harris Test for lateral dominance.

Results: The results obtained highlight that the dominant type of laterality is RRR - completely right-handed with stably accomplished laterality (81 subjects), followed by RLR - crossed ocular-manual and stably accomplished laterality (29 subjects). The proportion of those with LLL laterality - completely left-handed with stably accomplished laterality is small (4 subjects). In terms of general intelligence, most participants had IQs that can be classified in the category of those with a higher level of intelligence (65 subjects), succeeded by those with a superior medium level (27 subjects).

Conclusion: Identifying the type of laterality and level of intelligence of children participating in physical education and sports classes is needed in order to leverage the intervention on the psychomotor components and to facilitate the process of adaptation of the child to the school environment.