bluuebunny/crossref_metadata_2025_split huggingface dataset:
Potential concentration of heavy metal copper (cu) and microalgae growth Spirulina plantesis in culture media
Authors: Budi R M S , Rahardja B S , Masithah E D 
Published: February 2020

Abstract
Water is an important environmental component for life. Heavy metal water pollution comes from many industries. Heavy Metals Copper (Cu) is one of several other heavy metals that are harmful to living things. One way to anticipate the increased pollution of heavy metals Copper (Cu) in waters is bioremediation using microalgae. This study aims to determine the ability of Spirulina plantesis in absorbing heavy metals Copper (Cu) and to determine the influence of heavy metal Copper (Cu) on the growth of Spirulina platensis. This study used an experimental method with Completely Randomized Design (RAL) consisting of four treatments and five replicates, namely A (S. platensis 0 ppm), B (S. platensis 1 ppm), C (S. platensis 3 ppm), D (S. Platensis 5 ppm). The results showed that Spirulina platensis was able to absorb heavy metal of Copper (Cu) so that it can be used as a heavy metal bioremediation agent. On treatment B (1 ppm) absorption of 87,719%, C (3 ppm) equal to 97,886% and D (5ppm) equal to 95,872 % Growth with the addition of Cu affects Spirulina platensis growth
Effect of enzyme papain against natural flavor of raw meat waste laundering surimi
Authors: Harahap N A , Satyantini W H , Sudarno  
Published: February 2020

Abstract
Washing waste material surimi fish meat has the potential to be developed into a natural flavor because it contains of proteins and amino acids are quite high. Enzymatic hydrolysis of proteins can produce compounds savory (umami) which can be used as natural flavor. This study aimed to determine the effect of the enzyme papain as an agent of the natural flavor of the washing waste material surimi fish meat. The treatment includes control of 0% (without the enzyme papain), the addition of the enzyme papain 2%, 4% and 6%. The results showed that administration of different concentrations of the enzyme papain give effect to the yield and the value of the resulting organoleptic flavor. The yield of flavor respectively-helped by 6.18%, 7.23%, 9.98% and 12.03%. Best papain enzyme concentrations in this study were treated with the addition of P2 which papain enzyme 4%, note the value yield of 9.98% with an average rate of acceptance of the panelists of the color, aroma, and flavor are 6; 3.4 and 3.7 which means rather liked, a bit fishy, and rather tasteless fish, the protein content of 15.62%, 0.26% glutamic acid, and water solubility of 96.5%.
Correlation between Serum Galectin-3 Level with Wall Motion Score Index in Patients with ST-Segment Elevation Myocardial Infarction
Authors: Halid K , Aminuddin M , Dewi I P 
Published: February 2020

Abstract
The inflammatory process plays an essential role in the process of atherosclerosis and the response of ventricular recovery after myocardial infarction. Galectin-3 is a mediator derived from macrophages and endothelium that is actively involved in various aspects of the inflammatory cell behavior. Galectin-3 increases in the formation of fibrosis and scar, which is a maladaptive response to injury and infarction such as ST-segment elevation myocardial infarction (STEMI). Wall Motion Score Index (WMSI) is a semiquantitative visual assessment of the dynamic left ventricular wall. WMSI has an association with left ventricular ejection fraction in assessing prognosis after myocardial infarction. This study aimed to determine the correlation of increasing galectin-3 level with WMSI in STEMI patients. A cross-sectional study with purposive sampling was done. Galectin-3 levels were measured using R&D System ELISA Quantikine® Human galectin-3 Immunoassay with units ng/ml. WMSI measured by 2D-echocardiography. We enrolled a total of 35 STEMI patients, 28 (80%) were males. The result of measurement of galectin-3 levels in STEMI patients increase significantly (12,545±6,504 ng/mL) and moderate positive correlation with WMSI (r=+0,429, p=0.01). The result of the study showed there is a significant positive correlation between serum galectin-3 level with WMSI in STEMI patients.
The Effect of Atorvastatin Administration before Percutaneous Coronary Intervention on Stable Coronary Artery Disease Against Event of Periprocedural Myocardial Infarction
Authors: Dewi L P C , Yogiarto R M , Suryawan I G R , Pratama M D 
Published: February 2020

Abstract
Statin administration before Percutaneous Coronary Intervention procedures (PCI) is proved in reducing the incidence of Myocardial Peri-Procedural (PMI) infarction. This research was to compare between of pre-treatment 40mg Atorvastatin administered two hours before PCI in Stable Coronary Artery Disease (SCAD) patient and without pre-treatment in reducing the rate of periprocedural myocardial infarction. This study was a Clinical Trial with pretest-posttest control group open-label randomized design. Data were analyzed using Kolmogorov Smirnov Sample test and Chi Square Test. The PMI incidence in the atorvastatin group was 0% and in the control group was 8.3% (p = 0.489). The maximum CK-MB value after PCI in the atorvastatin group was 6.4ng/ml and 25.49ng/ml in the control group. Administration of 40mg Atorvastatin in SCAD patients before undergoing PCI shows a tendency of a decrease in PMI incidence.
Optimization of test specimen dimensions for thermal power station exposure device
Authors: Chvostová E , Horváth J , Konopík P , Rzepa S , Melzer D 
Published: February 2020

Abstract
Degradation of metallic materials can decrease mechanical properties of metal constructions and components in thermal power plants during their operation and consequently lead to loss of safety and reliability. It is difficult to remove material from the pressure system of the equipment being operated. Therefore, the effort is to design, produce and subsequently install exposure channels, which will allow to remove and evaluate samples of exposed material without intervention into the pressure system. The exposure device for pressures and steam temperature in supercritical blocks, which would contain sufficient test material to produce conventional test specimens, is unrealistic in size, energy and economics. The way is to optimize the dimensions of the exposure device according to the miniaturized test specimens, which, in addition to the tensile test and the structural evaluation, can also carry out other required tests, such as bending impact tests with transition temperature, fracture toughness and fatigue tests. This paper deals with optimization of test specimens for the internal dimensions of the exposure device and shows the applicability of small sample methodologies for selected materials.
The effect of mechanical surface pre-treatment on the strength of the adhesive joint of high strength sheets
Authors: Kejzlar P , Seibert O , Pilvousek T 
Published: February 2020

Abstract
Nowadays, in the car body parts production, the quenching is often replaced by adhesive joints. The adhesive joints have a lot of advantages – they allow to keep the protective layer, enable to join different material and prevent from the formation of heat affected zones. With respect to passenger’s passive safety, plenty of car body parts are manufactured of high strength steel sheets. The body parts are hot-formed at a temperature of 900 °C to the desired shape followed by subsequent rapid quenching to achieve the required strength. The sheets are covered with an AlSi 60/60 layer which should protect them from high-temperature oxidation during the forming process. However, brittle intermetallic interlayers form during the high-temperature treatment due to the reaction of iron from the substrate with Al/Si from the protective cover, which negatively affects the final strength of adhesion joint. The paper deals with the comparison of different possible ways of removing the layer on the final strength.
Optimization of workability technological testing for open-die forging
Authors: Kotous Jakub , Kubec Václav , Duchek Michal , Studecký Tomáš 
Published: February 2020

Abstract
Developing an open-die forging process for a poor-workability alloy has always been a challenge. This paper presents a rapid method that meets this purpose. A simplified forging test was considered for assessing the limit states of material in open-die forging. It can be employed in industrial forge shops. A V-shaped testing die was designed using finite element (FE) simulation. The V-shape geometry is convenient for strain evaluation. Rectangular blocks will be tested across a wide range of working temperatures. Based on the test results, limit states can be identified. Then friction testing method was optimized. It is also simple comparison test. Both technological tests are suitable for determination of optimized parameters in forging. The risk of material failure can thus be eliminated or minimized.
Effect of revolutions number on mechanical properties of HPT processed copper
Authors: Melzer D , Smirnov I , Evstifeev A , Rzepa S , Konopík P 
Published: February 2020

Abstract
This paper studies the effect of high-pressure torsion (HPT) method at ambient temperature on mechanical properties of material. The aim is to compare copper subjected to HPT for 2, 10 and 30-revolutions with coarse grain structured copper in a cold-rolled state. Miniaturized tensile tests were performed to evaluate anisotropy of mechanical properties within a disc product of HPT process. Also the strain rate sensitivity was examined. The results of mechanical tests demonstrate that increasing shear strain leads to ultra-fine grain structure (UFG) which resulted in increasing of material strength. The plasticity of material decreases correspondingly to that. With respect to character of HPT process, discs are known as non-homogenous products, where shear strain effect increases in radial direction from the centre section to the edge. Results show that with different number of HPT revolutions the anisotropy of mechanical behaviour is changing. With increasing number of revolutions the anisotropy within a single disc is increasing.
Flash pulse phase thermography for a paint thickness determination
Authors: Muzika L , Švantner M 
Published: February 2020

Abstract
The contribution describes a fast contactless measurement of a paint thickness non-uniformity using flash pulse thermography. Specimens sprayed by a paint were thermally excited by a flash lamp and temperature responses were recorded by an infrared camera. The recorded sequences were post-processed with Fast Fourier Transform to obtain phase angles. Differences in the resulting images showed phase differences which corresponded to a paint thickness non-uniformity. Furthermore, the phases were correlated with the thickness by means of calibration curve so that the paint thickness could be determined with flash pulse phase thermography measurement. The method showed a promising potential in the contactless evaluation of the paint thickness. Average error of the thickness determination was less than 10 % for samples with paint thickness from 41 to 74 µm on AISI 304 substrate. Advantages, disadvantages and limitations of described method were discussed.
CFD simulation of the multiphase heat transfer during the quenching process
Authors: Novosád J , Peukert P , Pomp N , Klouček P 
Published: February 2020

Abstract
The paper presents the results of the CFD (Computational Fluid Dynamics) simulation of quenching process for the ring shape sample. The aim of the work is to develop and validate the methodology for multiphase CFD simulation including the boiling during the quenching process. CFD simulation is provided in ANSYS Fluent. The Lee model is used for modelling the phase change during the quenching process. The first step consider the simulation of cooling of the ring sample when the correct model parameters will be found. Validation of results is performed by comparison with experimental data. Experimental was realized inside the own designed quenching bath device filled with quenching polymer. The general description of the experimental setup is included in the paper. The CFD results are cooling curves, i.e. variation of solid temperature on time. The Lee model parameters especially the evaporation frequency was tuned. Thin polymer film on the solid surface was considered to bring the results closer to the experimental data. The comparison between experiment and CFD shows very good agreement for higher temperatures, which covers the boiling stage. On the other hand for lower temperatures worse match of results was found caused probably by the sensitivity on the inlet velocity profile settings. Some recommendations for future work were defined.
The effect of SiO2 nanoparticles addition on lubrication properties of 10W-40 engine oil.
Authors: Seibert Ondřej , Kejzlar Pavel , Bakalová Totka 
Published: February 2020

Abstract
Proper lubrication of mechanical parts in the car engines shall minimize the wear of friction pair and thus to ensure long lifetime. Another goal of the lubrication is to decrease coefficient of friction and thereby reduce energy losses. Many publications are devoted to nanoparticle addition into simple oil (e.g. paraffin) but there is only limited attention to more complex lubricants as synthetic oils. In addition, there is paid very little attention to the stability of resulting suspensions. Present paper deals with the effect of different ways of SiO2 NPs addition into the advanced synthetic oil on the wear ratio of friction pair using ball-on-disc tribological test.
The effect of heat treatment on the structure and high – temperature strength of Fe3Al – based iron aluminide doped by carbon and carbide-forming element
Authors: Švec Martin , Vodičková Věra , Hanus Pavel , Keller Vojtěch 
Published: February 2020

Abstract
A structural study as well as the determination of σ0.2 compression yield stress at high temperatures have been performed on the Fe3Al-based iron aluminide doped by Nb (5 at. %) and C (1.5 at. %). The carbon occurrence leads to the formation of three-phase structure. Fe3Al matrix, niobium carbides and (Fe, Al)2Nb Laves phase were observed in the structure of investigated alloys. Precipitates were inhomogeneously distributed in as cast state alloy. The annealing at 1000 °C for 50 hrs. leads to more homogenously distribution of secondary phase particles and also to refinement of grain size. The strengthening mechanism of material at high temperatures was detected as a combination of strengthening by incoherent precipitates (NbC and Laves phase) and a solid solution hardening by Nb atoms. Effect of two reinforcing mechanisms together with homogeneously precipitate’s distribution increase the values of σ0.2 compression yield stress about 50 MPa in whole measured temperature range (600 – 800 °C) in comparison to similar intermetallic’s system Fe-Al-Zr-C.
Phase composition of the alloy was studied by means of scanning electron microscopy (SEM) equipped by energy dispersive X-ray spectrometer (EDX). The electron backscattered diffraction (EBSD) was used for phase verification and grain size visualization.
A Brief Review on Biomass Converted Useful Materials
Authors: Akshay M N , Anand V , Abhilash S , Deepak G , Kumar Shrivastava Prashant 
Published: February 2020

Abstract
In this work we have discussed the different types of biomass converted materials like pyrolysis of biomass, biomass-waste, gasification of harmful gases, carbon-based supercapacitor, silica, macadamia shell waste, lithium-sulfur battery, and rice husk, etc. from the different industries and different types of conversion approaches. There are different types of conversion techniques are available for biomass conversion like CVD, hydrothermal process, thermolysis, pyrolysis, combustion, and chemical treatments. The aim of this study to identify the various types of biomass converted materials from different types of industrial waste and also find out the better way to convert into a useful material.
Beneficiation of goethite iron ore through magnetizing roasting followed by magnetic separation
Authors: Kumar Jaiswal Raj , Acharya Dipak kumar , Soren Shatrughan 
Published: February 2020

Abstract
The present study is carried out to recover iron value from low grade goethite iron ore. The method is based on coal based magnetization roasting followed by magnetic separation. The effect of temperature, residence time and magnetic field intensity on grade and recovery of iron ore have been studied. The magnetizing roasting was carried out at 700°C, 800°C and 900°C for different residual time viz., 10, 20, 30, 40, 50 and 60 minutes. The production obtained from magnetizing roasting was then separated in wet high intensity magnetic separator (WHIMS) at different magnetic field of 2000 gauss, 4000 gauss and 6000 gauss. The result obtained at 900°C roasting temperature for 50 minute followed by magnetic separation at 2000 gauss shows optimum Fe grade of 59.20% and recovery is 68.23%, this grade and recovery of iron ore increases with increase of temperature and time. However, the grade and recovery of iron ore decreases during prolonged roasting at 900°C. The recovery increases with increasing in magnetic field but the grade is decreasing. In the present study, the as received goethite iron ore and concentrate ore have been examined using optical microscopy to know the phases present and change of phase during processing.
An IOT based secure transaction system using Micro field communication
Authors: Kumar Sanjay , Singh Dhananjay , Singh Rahul , Gupta Gagan , Singh S K 
Published: February 2020

Abstract
The humans have always tried to improve quality of living and technology plays a major role in this cause. Modern technology has been evolving with the emergence of smart technologies. Cash Based transaction involves lot of human effort of withdrawing and then storing the cash. It is also an insecure way of payment involving fears of theft etc… With large amounts of data transfer and e-payment needs, NFC is one of the prime technologies contributing towards fast and secure transmission of electronic signals, data and money. This paper focuses on NFC technology utilisation for a simplified and secure unified transaction system using IOT. Internet of things is a technology of present and future which has its applications in various fields like healthcare, transportation, manufacturing etc… There has already been a lot of research and developments on utilisation of NFC technology for transactions, but we propose a secure wireless transaction system by providing features such as database connectivity and user authentication in the system
Application of ELECTRE- I,II methods for EDM performance measures in manufacturing decision making
Authors: Tiwari Rashmi , Agrawal Sharad , Kumar Kasdekar Dinesh 
Published: February 2020

Abstract
Due to the demand of customer point of view requires good performance component with low cost. So, we have to expand the machining characteristics of Al7075 alloy containing 2wt% SiC on EDM. During machining following indicator has to be used for measures EDM performance. These output indicators for EDM are Surface roughness i.e., Ra and Rz, and also Energy consumption (PC). For experimenting, we choose the CCD approach in RSM. In this work, we have to apply a novel approach, multi-attributes decision making to predict the optimum result for the following criteria. In MADM approach using Electre I and II as an application to optimize EDM performance. Electre I and II have decided,based on Entropy weighting percentage. To predict sophisticated optimal attribute that contains the values of criteria (as an EDM performance indicator). Electre I and II offer Rank of alternatives that helps the designer to choose the best decision. At last, the graph shows the comparison of the computational results between Electre I and Electre II.
Modelling Drivers of Coordination Risk in Production System
Authors: Shakya R , Chauhan P 
Published: February 2020

Abstract
The production system process involves the coordination of a wide range of dissimilar and interconnected activities that’s why it involves more risk and uncertainty. When an organization coordinate with a differently located organization, it is very critical to established relations with new suppliers and sometimes it may bring about coordination and language problems. Coordination risk is the major risk in the entire production system because many suppliers are supply raw material to the organization. Coordination risks are very volatile and also often more difficult to observe, so they may go unnoticed. The main objective of this paper is to identify and understand the mutual interaction among various drivers of coordination risk which affects the performance of production system. To this effect, authors have identified various drivers through extant review of literature. From this information, an integrated model using interpretive structural modelling (ISM) for drivers of coordination risk in production system is developed and the structural relationships between these drivers are modelled. Further, MICMAC analysis is done to analyse the independent power and dependency of drivers which shall be helpful to managers to identify and classify important conditions and to reveal the direct and indirect effects of each condition of coordination risk on production system.
Valve Controlled Automatic Opto-Hydroponics System
Authors: Singh Kushagra , Kumar Maduri Praveen , Soni Apurva , Maurya Rishabh 
Published: February 2020

Abstract
In the growth of plants, various geological parameters like soil, air and water have been greatly affected by the increase in level of pollution and climate change. Degradation of soil, harmful gases in the air and loss of various macro nutrients are some common problems affecting the growth of plants. The only way that the plants could survive in a polluted environment is growing them in a well-managed and monitored greenhouse system. In this paper, a system is demonstrated which uses hydroponics technique and an artificial led light (Blue Red Pink) system to grow plants. The system is an automatic setup of hydroponics and led lights integration various sensors to manage the physical environment inside the greenhouse. System also proposes a hydroponics tube which is created for the seeds to directly grow on the tubes without shifting.
Design and Fabrication of low capacity Torque Transducer
Authors: Yadav Pooja , Pant Meena , Sheoran Ankita , Kumar Arora Pawan , Kumar Harish 
Published: February 2020

Abstract
The current work focuses on the development of a Torque Transducer capability of 10 Nm and analysis of it using FEA software ABQUS V.2018, it also focuses on identification of important parameters that impacts the stress values like mesh type and global seed size, values of stresses obtained using both analytically and computational are compared and parameters for which most conforming results are obtained is identified. Effect of mesh size and type has been thoroughly studied and it is analyzed what mesh type and what mesh size gives results most closer to analytical values. Using the same analysis it is found out at what point maximum stress, strain values occur on the surface, this helps in ascertaining the locations where strain gauges could be mounted on the sensing elements. For analysis purpose model is prepared using Autodesk Fusion 360 software and on that FEA is performed. Further the designed model has been fabricated using series of CNC machining operations After the fabrication is complete, strain gauges are mounted on previously identified location to measure the strain / stress values.