bluuebunny/crossref_metadata_2025_split huggingface dataset:
Washing soda induced alteration of the differential cell count, nonself surface adhesion efficacy and nuclear morphology of the polyphenotypic cells of a freshwater sponge of India
Authors: Mukherjee Soumalya , Ray Mitali , Ray Sajal 
Published: November 2019

Abstract
Washing soda has been identified as a precarious contaminant of the freshwater ponds and lakes, the natural habitat of Eunapius carteri. Treatment of sublethal concentrations of washing soda for 384 hours exhibited a significant decrease in the densities of blast like cells, small and large amoebocytes. The percentage occurrence of granular cells and archaeocytes yielded a marked increase against the experimental concentrations of washing soda. Washing soda mediated alterations in the differential cell densities of E. carteri indicative of a state of physiological stress and an undesirable shift in the cellular homeostasis of the organism distributed in polluted environment. Experimental exposure of washing soda yielded a significant increase in the cellular dimensions of large amoebocytes and archaeocytes. Prolonged treatment with washing soda presented a gross reduction in nonself surface adhesion efficacy of E. carteri cells. Experimental concentrations of washing soda resulted in a dose dependent increment in the frequencies of binucleation and micronucleation in the cells of E. carteri. The data were indicative of a high level of genotoxicity of washing soda in E. carteri. The present investigation provides an important information base in understanding the toxin induced chemical stress on the archaic immune defense of a primitive urmetazoa.
An attempt to increase technological capabilities of laboratory vibratory mills by changing the construction of chamber
Authors: Tomach Paweł 
Published: November 2019

Abstract
The paper presents the issues related to the grinding process in the vibration mills with low vibration frequency. These mills are rated among devices with high energy of impacts with much wider potential of industrial use than the classic gravitation mills. In vibratory mills there is an unfavorable decrease in the intensity of the grinding process along with the increase in the chamber diameter, which makes it impossible to achieve high performance of such devices. One of the ways to reduce or eliminate this occurrence is to intensify the load movement inside the chamber – this is the subject of this article. The article shows that in a vibrating mill of periodic action it is possible to increase its technological capabilities by application of an appropriate cylindrical component permanently installed inside the milling chamber. The paper also presents an attempt to increase the technological capabilities of a laboratory continuous vibratory mill.
Study of the efficiency of the large-diameter fishing tools with the moving magnetic systems
Authors: Romanyshyn Taras , Sheketa Vasyl , Romanyshyn Liubomyr , Buchynskyi Myroslav 
Published: November 2019

Abstract
The variety of accidents which happen during the construction of oil and gas wells causes the expansion in the use of magnetic fishing tools. However, the known tools based on permanent magnets have a significant drawback involving the flat working surface of the magnetic system that does not permit to achieve a considerable attraction force to a fished object of complex geometric shape. Therefore, the aim of the research is to increase the efficiency of removalthe objects of irregular geometric shape from the wells by enlarging the area of contacting them. For that purpose, it has been developed a fundamentally new design of the large-diameter fishing tool with the moving magnetic systems capable of copying the shape of the objects to be fished. Each magnetic system, which is compound of permanent rare-earth neodymium magnets and concentrically placed magnetic cores, shall be held by the magnetic field of adjacent systems with opposite polarity. There were conducted theoretical studies using the finite element method to determine the working capacity of the designed tool. As a result, it has been found the valueof hoisting capacity during the interaction of magnetic systems with the roller cone of the drill bit; this fact confirms the capability of fishing the objects of irregular geometric shape. In addition, it has been explored the influence of the material of the fished object on the power characteristics of magnetic systems. The application of the designed magnetic tool allowsremoving the ferromagnetic objects from the well regardless of their shape, weight and position onthe bottom hole. Apart from that, the given tool may be used in the areas where the technology of work is related to drilling wells.
The influence of belt cover thickness on conveyor belt indentation rolling resistance
Authors: Woźniak Dariusz 
Published: November 2019

Abstract
One of the methods for lowering of energy consumption in the drive mechanisms of long horizontal belt conveyors is to reduce belt indentation rolling resistances. These resistances depend on a number of factors: bottom cover properties, bottom cover thickness, belt design, idler diameter, load, speed and frequency at which the belt passes on the idler (indentation frequency), as well as on temperature. Determining how these factors influence indentation rolling resistances of various conveyor belt types is of great importance. The article describes a small-scale method for testing indentation rolling resistance. The method allows analysis of the influence of various factors on indentation rolling resistances. The article presents the results of tests on how belt indentation rolling resistance is influenced by thickness of the belt bottom cover. The tests were performed on belts with various core types.
Directions for increasing conical picks’ durability
Authors: Bołoz Łukasz 
Published: November 2019

Abstract
Conical picks are cutting tools used in many branches, in particular in the mining, road construction and building branch. Contact with the excavated face causes their constant wear, which is an unfavorable but unavoidable process. Milling heads of working machines are equipped with several dozen conical picks, and mining in abrasive or hardly accessible rocks can reduce their life to a few hours. It is in the interest of both users and producers to increase their durability, as tools replacement, apart from purchase and logistic costs, results in machine downtimes. In the article various solutions of conical picks, their construction, dimensions and materials used have been discussed. Technical procedures applied to increase the durability of conical picks and their regeneration as well as methods of extending the life of picks working in difficult conditions have been presented. Two author’s methods of extending the life of picks working in difficult conditions, covered by a patent application, have also been presented. The first solution involves ensuring an uninterrupted rotational movement of the pick in the holder. Patent claims include an innovative method of equipping the additional sleeve integrated with the holder with a rotational bearing, which enables a continuous rotation of the pick. The tool equipped with a bearing generates much lower movement resistance than the standard mounting. The holder is designed to mount classic commercial picks. What is important, the pick replacement does not require interfering with the bearing assembly. The second solution concerns the manner of protecting the working part of the pick by means of a special element made of an abrasion resisting material. This element is the pick tip, the geometry of which varies from the commonly applied posts made of sintered carbide. In this solution, the tip has a shape corresponding to the form of conical pick’s wear, which causes that its steel body does not wear. Moreover, there is a possibility of applying a mobile, rotational mounting of the tip to the body.
Modelling and simulation tests of a quadrocopter flying robot
Authors: Ciesielka Wojciech , Suchanek Grzegorz 
Published: November 2019

Abstract
In recent years, there has been a dynamic increase in the use of multirotor flying robots in various areas of economic and social life. Robots of this kind may be used in environmental research, after equipping them with an appropriate measuring systems. This includes taking measurements of various types of contaminants, such as: particulate matter (PM), various gases, noise and light pollution. To make this possible, it is necessary to conduct advanced model-simulation tests of the flying platform, analyse and determine the appropriate location for the measurement system. Most of the current research on methods and techniques of taking measurements on the flying platform does not take into account these issues. This work consists of two main parts: modeling and simulation tests, and experimental part carried out in laboratory conditions. As part of the work, quadrocopter dynamics equations have been developed and implemented in the Matlab/Simulink environment. The developed discrete mathematical model made it possible to simulate different robot maneuvers: upward, forward, sideways and rotation flight. In order to determine the required characteristics of the multicopter drive sets, a mobile dynamometer station was designed, constructed and programmed. The dynamometer allows, among others, to take measurements of thrust force, torque and rotational speed. The final stage of the work was the development of the numerical model and CFD calculations of the quadrocopter. In this part, distributions of the pressure fields and velocity for the robot's hover state were determined.
Modelling of global solar irradiance on sloped surfaces in climatic conditions of Kraków
Authors: Michalak Piotr 
Published: November 2019

Abstract
The paper presents calculations of global solar irradiance on inclined surfaces of any orientation in the hourly time step. For computational purposes there were used the data from typical meteorological years (TMY) available in a form of text files on the website of the Ministry of Infrastructure and Development. Hourly solar global horizontal irradiance from measurements from the file for Kraków was used as input for five anisotropic models (Hay, Muneer, Reindl, Perez and Perez according to the new PN-EN ISO 52010-1 standard). Direct normal and diffuse horizontal and then global irradiances were calculated. To illustrate the effects of using different models, for the exemplary residential building, monthly solar heat gains and heating demand was determined according to the monthly method of PN-EN ISO 13790. In comparison to the solar data from the TMY, an average decrease in the value of solar gains amounted 37%, what resulted in an increase in the calculated heat demand of the building by 10%. This is very important since this change takes place without any modernisation works.
Presentación
Authors: Paideia Surcolombiana Revista 
Published: November 2019

Las dudas propias del que inicia una delicada misión gradualmente las fuimos superando al tiempo con las satisfacciones alcanzadas en nuestro trabajo, de las cuales dejamos una constancia en este documento, con el deseo de orientar las acciones futuras de quienes merecidamente asuman la continuidad en la dirección de la Facultad.Expresamos nuestra gratitud a quienes nos acompañaron en el Consejo de Facultad; a los profesores de tiempo completo, medio tiempo y catedráticos; a los estudiantes de los diferentes programas; a los trabajadores y secretarias que con su espíritu de superación y colaboración nos facilitaron el éxito en las acciones para una Facultad que ha sabido responder a los retos del futuro. También agradecemos a los directivos de la Universidad que a través de las diferentes instancias nos proporcionaron los medios para el cumplimiento de nuestros compromisos.En la intimidad de nuestras apreciaciones creemos que hemos actuado con sinceridad y apertura hacia cada una de las tendencias en las que se desenvuelve el diario quehacer académico y creemos haber atendido las inquietudes y cumplido los mandatos de profesores y estudiantes.
Proyecciones académicas de la Facultad
Authors: Paideia Surcolombiana Revista 
Published: November 2019

ESPECIALIZACIONES
Especialización en Física
OBJETIVOS:1. Estudiar con mayor rigor teorías y conceptos fundamentales que en la actualidad constituyen las ideas básicas y teóricas esenciales para el desarrollo de la física.
2. Desarrollar capacidades para el ejercicio de la investigación mediante la aplicación de la metodología científica a la solución de problemas específicos de la misma.
3. Aplicar los conocimientos de la física en el estudio de otras disciplinas.
4. Profundizar en el estudio del problema enseñanza aprendizaje de la física.
PERFIL:
La especialización permitirá formar un profesional con amplia solvencia académica en el área de la Física para aplicar los conocimientos en su rama específica del trabajo.
The use of nursery rhymes to teach writing for the eighth grade students of SMPN 2 Geger
Authors: Lian Maria Agustina Astuti Siba , Ningsih Nuri Ati 
Published: November 2019

<p><em>Writing is one of the basic skills in English teaching that must be mastered well by the students. Nursery Rhymes is choosen as a media in teaching writing in order to make the students easily to understand. The objectives of this research are: to describe the implementation, the advantages and the disadvantages of the use Nursery Rhymes to teach writing. The researcher takes place at SMPN 2 Geger. The researcher uses qualitative approach in this research. The source of data are social situation, participant/informant, and documents. The techniques of collecting data are observation, interview and documentation. The triangulation is used to validate the data while the researcher analyze the data through three phases consist of data condensation, data display and verifying conclusion. The result of the research shows that the implementation of the use of Nursery Rhymes to teach writing are explaining materials, introducing a Nursery Rhymes, play the song of Nursery Rhymes, and guiding the students write a text about the Nursery Rhymes. Beside, the advantages of the use of Nursery Rhymes to teach writing are: it is simple and cheaper than other media, it is enriches students’ vocabulary. While, the disadvantages are: it needs much time in teaching learning process, students still ask their teacher about the vocabulary and they are too lazy to open their dictionary. Meanwhile, it is suggested that the students should bring their dictionary in English class. The other researcher are expected to do a research about Nursery Rhymes for other skills.</em></p>
Assamese Monkeys in Nagarjun Forest of Shivapuri Nagarjun National Park, Nepal
Authors: Chalise Mukesh K , Ogawa Hideshi , Pandey Bishnu 
Published: November 2019

The population distribution of Assamese monkey Macaca assamensis were studied in Nagarjun forest of Shivapuri Nagarjun National Park, Nepal and data collected during Dec. 2013 and January 2014, by scan sampling methods along with transect walk through forest trails and ring-road of forest. Sevenbi sexual troops were observed in subtropical/lower temperate forest of Nagarjun forest especially around Raniban forest area. The observed smallest troop was with 9 individuals while the largest troop had 37 (41) individuals of different age. The average troop size is 20.57. Out of three broad age groups adults were 56.31% and immature 43.06% while infant alone were 18.06%. The sex ratio between male and female was 1:1.34. Plant usage for feeding and resting were also enumerated. Nagarjun forest troops use mostly tall trees for the night halts and resting in day time.
Effect of hard chrome plating parameters on the wear resistance of low carbon steel
Authors: Kir Hasan , Apay Serkan 
Published: November 2019

Abstract
Electrolytic hard chrome plating is applied to improve the surface properties of metals and add a decorative look. In this study, hard chrome plating was applied to low carbon steel in various parameters by means of an electrolytic method. The plating and metal surface of the specimen were analysed using a scanning electron microscope (SEM). Following SEM analyses, microhardness measurements from the plating to the base metal in the samples were conducted at 100 g. The wear resistance in the plated samples was determined by the pin-on-disc method. Moreover, the surface morphology was examined by SEM and optic profilometer subsequent to the wear experiment. The results showed that the hard chrome plating, which was applied at 0.4 A × m-2 current density, 100 mm anode-cathode distance and 60 °C bath temperature, yielded the highest wear resistance and hardness.
Mechanical properties of plain woven kenaf/glass fiber reinforced polypropylene hybrid composites
Authors: Dhar Malingam Sivakumar , Subramaniam Kathiravan , Lin Feng Ng , Fadzullah Siti Hajar Sheikh MD , Subramonian Sivaraos 
Published: November 2019

Abstract
There has been an increasing interest among researchers on natural/synthetic hybrid fiber reinforced composites due to their extensive advantages such as enhanced mechanical properties as compared to natural fiber reinforced composites. The balance between environmental friendliness and mechanical strength can be achieved through hybrid composite materials. This study aims to investigate the effects of stacking sequences on the mechanical properties of woven kenaf/glass hybrid composites. Woven kenaf/glass hybrid composites with two different stacking sequences were fabricated in the hot compression process. Non-hybrid glass and kenaf fiber reinforced polypropylene composites were also prepared for comparison. Tensile, flexural and Charpy impact tests were conducted in accordance with ASTM D 3039, ASTM D 790 and ASTM D 6110, respectively. The results showed that the tensile strength of glass/kenaf/glass hybrid laminates was only 3.4 % lower than that of non-hybrid glass fiber reinforced composites. The flexural strength of hybrid glass/kenaf/glass laminates was 32.5 % higher than non-hybrid glass fiber reinforced composites. In terms of impact strength in edgewise and flatwise orientations, hybrid glass/kenaf/glass laminates showed 8.6 % and 51.9 % improvement, respectively, as compared to non-hybrid glass fiber reinforced composites. This showed that the hybrid laminates exhibited superior mechanical properties as compared to non-hybrid glass fiber reinforced composites.
Optimization of cryogenic treatment effects on the surface roughness of cutting tools
Authors: Kara Fuat , Takmaz Aysun 
Published: November 2019

Abstract
In this study, surface roughness tests were performed on AISI O2 cold work tool steel using coated and uncoated carbide cutting tools applying deep cryogenic treatment. Cutting parameters with optimum surface roughness for turning cold work tool steel were determined by the Taguchi method Turning experiments were made according to the Taguchi L16 (43) orthogonal array. The evaluation of the experimental results was based on the signal/noise (S/N) ratio. Cutting parameters were selected for four different cutting tools, cutting speeds (150, 200, 250, 300 m × min-1) and feed rates (0.08, 0.16, 0.24, 0.32 mm × rev-1). The effect levels on the surface roughness of the cutting parameters by analysis of variance (ANOVA) were performed using the experimental results. Multiple regression analyses (linear) was conducted for the experimental results. The correlation coefficient (R2) was obtained via the linear regression model which showed a value of 0.914 for Ra. Finally, confirmation tests were performed and showed that optimization was successfully implemented.
The Use of Magnesium Sulphate and Morphine Vs. Morphine-Only in Irukandji Syndrome: A Retrospective Review of Ambulance Data
Authors: Rathbone John , Franklin Richard , Nimorakiotakis Vasilios 
Published: November 2019

Introduction In 2006, the Queensland Ambulance Service (QAS) approved the use of magnesium sulphate for the management of patients with Irukandji syndrome (IS). The aim of this study was to compare pain scores and hypertensive (systolic BP ≥140 mmHg and/or diastolic BP ≥90 mmHg) patients who received intravenous morphine as their treatment (morphine group) over those who received a combination of intravenous morphine and magnesium (magnesium group). Methods A retrospective case review of all IS patients attended by the QAS between 2007 and 2014. A search of the QAS electronic data base found 112 patients had IS. Analyses in IBM SPSS v.22 was undertaken to determine the outcome in final pain scores and blood pressure between the two groups. Results Pain reduction was statistically different (F=29.18; p<.01), between the morphine group and the magnesium group with mean numerical pain scores post-treatment of 4.91 (95% CI: 4.02–5.81) and 2.21 (95% CI: 1.66–2.76) respectively. There was a lower frequency of patients in the magnesium group who remained hypertensive on arrival at a medical facility, with a significant difference between mean arterial BP of 101 mmHg (95% CI: 96–105; p=.028) and diastolic BP of 84 mmHg (95% CI: 80–88; p=.029) post-treatment. Of the 54 cases in the magnesium group, 32 were normotensive post-treatment compared to only six from the morphine group (n=17). Conclusion There has been considerable difference of opinion as to the utility of magnesium in IS and a marked difference in the results of case series versus a small randomised control trial. This study suggests that the combination of morphine and magnesium is more effective in treating patients with IS than morphine alone.
Cristallogenèse expérimentale des smectites magnésiennes : hectorite, stévensite
Authors: Decarreau Alain 
Published: November 2019

La synthèse de smectites magnésiennes a été réalisée à basse température (5 à 90 °C) à partir d'un coprécipité silicomagnésien obtenu par la réaction suivante :
4 SiO₂Na₂O + 3MgCl₂ + 2 HCl → Si₄Mg₃O₁₁(nH₂O) + H₂O + 8 NaCl.
Le précipité solide est ensuite mis à évoluer en suspension aqueuse en présence ou non de LiF (ou LiCl). A 75 °C on obtient ainsi en 2 à 3 semaines des minéraux de type hectorite ou stévensite purs en tous points comparables à leurs équivalents naturels.
L'évolution structurale du précipité est suivie par diffraction X et étude au microscope électronique. La cristallogenèse est identique pour la stévensite et l'hectorite. Le mécanisme est le suivant : dès sa précipitation le solide silicomagnésien est constitué de petits germes ayant 15 Å de côté dans le plan (a, b) du minéral et comportant 2 à 4 feuillets T.O.T. empilés. Ces germes sont associés au sein de pseudoparticules de 400 Å de diamètre. La croissance cristalline s'effectue essentiellement par coalescence de germes au sein des pseudoparticules, ce qui entraîne une augmentation continue des domaines cohérents dans le plan (a, b), et simultanément par accrétion des pseudoparticules entre elles. On n'observe pas d'augmentation, dans le temps, du taux d'empilement des feuillets suivant (c).
Le mécanisme de cristallogenèse mis à jour exclut le modèle souvent invoqué d'une fixation de silice sur une couche brucitique préexistante.
Certaines smectites naturelles ont une microstructure très semblable à celle de nos minéraux de synthèse, suggérant un mode semblable de néogenèse.