bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Phases Characterization of Fe-Cr ODS (Oxide Dispersion Strengthened) Steel Using X-ray Diffraction Technique
Authors: Sugeng B , Bandriyana B , Silalahi M 
Published: June 2021

Abstract
The formation of Fe-Cr alloy phase was analyzed using X_Ray Diffraction (XRD) technique to improve the synthesis process of the Oxide Dispersion Strengthened (ODS) steel. Synthesis of the ODS steel was performed using powder metallurgy method with a difference milling time of 3 hours, 5 hours and 7 hours. The phase composition and structure parameters of the Fe-Cr phase was analyzed by processing the diffraction data using the software of Rietveld refinement HighScore Plus. The crystallite size and microstrain of the alloy was calculated by the Williamson-Hall equation plot method. Results of the refinement analysis showed that the Fe-Cr alloying process has been successful for samples with milling time of 3 and 7 minutes. The milling time in the synthesis process change the crystallite size and micro-strain of the Fe-Cr alloys formed.
Navigation control of Drone using Hand Gesture based on Complementary Filter Algorithm
Authors: Budiyanto A , Ramadhan M I , Burhanudin I , Triharminto H H , Santoso B 
Published: June 2021

Abstract
One of the most important things to use UAV is navigation control. Navigation control is a way to adjust the direction of the quadcopter movements according to the command of the pilot. Natural User Interface (NUI) is a new way to interact with a system as navigation control. In this study, a wearable device was made that can detect hand gestures and gives instructions to the Dji Tello drone. The MPU6050 sensor is used to provide response in two dimensional axes. The complementary filter implements low pass filter on the accelerometer and integrates the value of the gyroscope with the previous angle output. After that, the value will be fed to the high pass filter. The results of the two filters will obtain stable angle, by adjusting the filter coefficient and the sampling time. The aim of complementary filter method is to reduce noise in angular transformation when the pilot makes hand gestures. Based on the experiments, the results show that hand gestures could give command for Dji Tello drone movements successfully. Therefore, it has been proven that the hand gesture can be used for the navigation control system on the Dji Tello drone.
The Functionalization Study of PVDF/TiO2 Hollow Fibre Membranes Under Vacuum Calcination Exposure
Authors: Pradhana E A , Elma M , Othman M H D , Huda N , Ul-haq M D , Rampun Erdina L.A. , Rahma A 
Published: June 2021

AbstractIn this study, polyvinylidene fluoride (PVDF) hollow fibre membrane was modified by adding TiO2. TiO2presence affects the membrane structure becomes more less hydrophobic which makes the membrane less fouling. Membranes were made via dry-wet spinning method and calcined under vacuum condition by furnace (100, 300, and 500 °C). Besides, PVDF-TiO2uncalcined membrane were also prepared as comparison to investigated the effect of calcination on hollow fibre membrane’s functional groups. Fourier Transform Infrared (FT-IR) spectra indicated that all PVDF-TiO2membranes have bands of OH in the TiO2at ∼1600 cm−1. Peaks of α-phase PVDF crystals appeared at ∼876, ∼876, and ∼872 cm−1for uncalcined, 100 and 300 °C, while for 500 °C the PVDF peak only shows at 874 cm−1. The peaks at ∼1200 cm−1represent CF2groups. Peaks at ∼1400 cm−1assigned to CH2groups, but it does not observed for 500 °C. Deconvolution by Fityk software that shows calcination using vacuum condition gives the compounds gradually decomposes. At high temperature calcination lead the CH2peak extremely lost.
Photodegradation of Rhodamine B using Composite AndisoI/TiO2
Authors: Pranoto  , Purnawan C , Rachmawati C 
Published: June 2021

Abstract
This research aims to determine the ability of andisol which is composited with TiO2 as a degrading agent of Rhodamine B dye. The composite was made by sonication and calcination. Each material was characterized by FTIR and XRD. Photodegradation was carried out under a UV lamp with variation of the degradation time for 1, 2, and 3 hours. While the pH variation was carried out at 3, 5, 7, and 9. The photodegradation results were tested using UV Vis spectrophotometer at wavelength of 552 nm. Based on these results, the optimum conditions for photodegradation at pH 5 with irradiation time of 2 hours was 39.55%.
Study on the Adsorption of Chromium (VI) Metal Ion from Aqueous Solution by Green Algae Biomass (Chara fragilis sp.)
Authors: Hastuti B. , Hapsari E.D. , Hadi S. 
Published: June 2021

Abstract
Chromium (VI) is major heavy metal found in textile industry wastewater that cause environmental pollution. Biosorption of heavy metals by using algae biomass has emerged as a cost-effective and efficient alternative technology. This study aims to develop algae (Chara fragilis sp) biomass as adsorbent for Cr (VI) metal ion in aqueous solution.
In this study, the optimum conditions of the absorption of biomass Chara fragilis sp. to Cr (VI) ions was determined on the parameters of the optimum contact time and adsorbent mass. Cr (IV) was analyzed by using AAS and the pattern of adsorption isotherms was determined. The results showed that Chara fragilis sp biomass has clear ability in adsorbing Cr (VI) ion in aquoeus solution with optimum contact time was 40 min and the adsorbent mass was 1 g. Under those optimum conditions, the percentage of absorption of Cr (VI) were 24% and 27%, respectively. The adsorption isotherm of Chara fragilis followed the Freundlich pattern, which showed that adsorption mechanism occured physically.
Effectiveness of Nanosilver Biosynthesis using Inulin Gembili Tuber (Dioscorea esculenta L.) on Variation of Inulin Solution Towards Particle Sizes and Antibacterial Activities
Authors: Ermawati D E , Yuniastuti A , Fadjrin H I 
Published: June 2021

Abstract
Inulin is one of fiber and carbohydrates sources derived from plants. In the medical fields, inulin is used for prebiotic and antibacterial agent. Inulin is generally supplied by importing from America and England. Gembili is an Indonesia local tuber that is reported to have potential as a high source of inulin. In this study, the biosynthesis process was carried out using silver nitrate to produce a better properties and more effective than starting material. This study aims to determine the effectiveness of biosynthesis nanosilver using inulin gembili in variational solubility temperature of inulin at 25 °C and 60 °C to produce the expected particle size and antibacterial activity against S. aureus and E. coli bacterias. The results of this study are biosynthesis nanosilver using inulin gembili that dissolved at temperature of 25 °C produce particle size of 29.8 nm, whereas at temperature of 60 °C produces 35.4 nm. Meanwhile, variations in temperature of inulin solubility did not show any significant difference towards silver nitrate control in the antibacterial activity test against S.aureus and E.coli, even though the FTIR spectra showed that interaction between functional groups of silver nitrate and inulin gembili. Therefore, in this study, inulin function as a capping agent and did not induce the antibacterial activity of silver nitrate.
Analysis of Rhodamine B Content in “Geplak” Marketed in Yogyakarta City in 2019
Authors: Yugatama A , Hapsari T 
Published: June 2021

AbstractRhodamine B is a coloring agent which is prohibited to add in food. Rhodamine B often used to color food product, beverage, and cosmetics. Rhodamine B is a synthetic coloring agent used in the textile and paper industry, this synthetic coloring agent is dangerous when inhaled, affects the eyes and skin, and is swallowed. The purpose of this study was to identify and know the levels of rhodamine B in geplak samples circulating in the city of Yogyakarta. Geplak samples studied amounted to 5 samples taken from souvenir shops in the city of Yogyakarta. The method used to identify rhodamine B in geplak was soaking the samples in ammonia to pull out rhodamine B dyes using wool yarn, followed by identification using thin layer chromatography with the mobile phase of n-butanol: ethyl acetate: ammonia (10: 4: 5). Then it was detected with UV light of 254 nm and 366 nm. The analysis of rhodamine B levels and the maximum wavelength of the sample was carried out using UV-Vis spectrophotometry. The results showed that the 5 samples examined by thin layer chromatography or UV-Vis spectrophotometry were not identified as containing rhodamine B.
The Use of Crumb Rubber as Modified Bitumen for Crack Filling at Deteriorated Pavement
Authors: Setyawan A , Pramesti F P , Sarwono D , Djumari  , Budiarto A , Marswanto TS 
Published: June 2021

Abstract
Crumb rubber is tire retreading waste which is classified as a hazardous material because it can pollute the environment. In an effort to create an environment free of pollution, one of the efforts is to reuse it as building material. In this research, crumb rubber will be used to modify the 60/70 penetration bitumen to have a better performance as crack filler on roads that are damaged in the form of cracks. As crack filler the material must have resistance to softening at high pavement temperatures during the day. In this study, crack filler was examined in the form of penetrating asphalt with the addition of additives, namely Crumb Rubber. The result parameters are based on ASTM D5078 standards and testing procedures based on ASTM D5329, where tests include softening point, cone penetration, resilience and asphalt compatibility testing. The results show that the addition of 27 % CR to 60/70 penetration asphalt can increase the hardness of the asphalt, the softening point value, the resilience or recovery value which means reduced vulnerability to temperature.
Effectiveness of Longsegment Contract Method on The Road Rehabilitation and Maintenance System
Authors: Widyanitya A , Setyawan A , Pramesti FP 
Published: June 2021

Abstract
Longsegment is a road maintenance system on a contract basis to service providers throughout the fiscal year. In implementing longsegment contracts, service providers are required to have good quality materials so that road maintenance is maintained in quality, this causes the costs incurred to be efficient. This research will discuss how effective the longsegment road maintenance system is so that it can achieve a more efficient implementation cost for road maintenance. This research method is to measure the performance of roads handled by conventional contracts and longsegment contracts in terms of the final results of road conditions as assessed by the International Roughness Index (IRI) and Surface Distress Index (SDI) methods, then analyze the effectiveness of the contract system on the costs incurred by the user. The results showed that road performance carried out in 2016 by conventional contracting resulted in road stability of 88.79% at a cost of Rp. 87,912,696,000.00 while road performance using the longsegment contract system implemented since 2017 resulted in road stability. 95.29% with a fee of Rp. 75,312,723,000.00; road stability is 95.97% at a cost of Rp.70.026300.000.00; road stability is 90.42% at a cost of Rp. 24,014,464,000.00. From the results of road conditions and costs incurred for road preservation, it can be concluded that longsegment road maintenance is more effective than conventional contracts.
Activity Based Costing Method for Analysing Asphalt Mixture Produced by Diesel and Palm Shell Fuel in Asphalt Mixing Plant
Authors: Khusaini Z Y , Setyawan A , Pramesti F P , Pranolo S H 
Published: June 2021

Abstract
The purpose of this research is to calculate the price of basic production mixed asphalt with fuel shells palm oil and diesel fuel in blow dryer asphalt mixing plant. The research is quantitative descriptive that focuses on the subject of study by decomposing, analyzes, and collect data the subject of study by a process of interviews and data collection secondary to Asphalt Mixing Plant (AMP). The process of data analysis to determine prices basic production uses the activity based costing who reckoning based on activity his job. The result of this research is the price basic the production of mixed asphalt Rp 916.821,10 per 1000 kg mixed asphalt. While the difference between the price production basic mixed asphalt with fuel shell palm oil with diesel fuel is Rp 66.837,44 or the cost of goods production mixed asphalt with fuel palm shell 6, 8 % for cheaper production of mixed asphalt use diesel fuel.
Study of mortar creep with additional polymer materials for concrete repair
Authors: Putri P M 
Published: June 2021

Abstract
The polymer is the type of additional material which has high adhesion and is deformable. This study aims to determine the effect of additional polymer against the value of the compressive creep, as well as to predict the long-term creep value based on existing short-term data and the possible error value. The method used in this research is to experiment in the laboratory. The object used in the study is a cylinder with a diameter of 75 mm and a height of 275 mm. The variations in polymer content that are used were 0%, 2%, 4%, and 6% of the cement weight. The data obtained on the creep values that occurred during the 84-day test The data analysis showed that the addition of polymer content in the repair mortar tended to decrease the creep value. The greater the polymer content, the smaller the creep value that will decrease. In the calculation of the obtained creep prediction, it showed a difference when compared to direct measurement. As the predicted value obtained has a large error value, it is necessary to modify the formula to get a more precise prediction.
Prediction of aluminium content in a metal using SPSS based linear regression analysis.
Authors: Golhar A.R. , Choudhari N.K. , Patil A.K. 
Published: June 2021

Abstract
In aluminium industry, it is very important to know the type or grade of aluminium metals and its composition present within the aluminium metals using non-destructive testing (NDT). A method is required which is unique and help to know the type of the aluminium material in order to characterize the aluminium samples. Ultrasonic testing is one of the best NDT techniques which are used for characterization of properties of the material. Recently it is observed that ultrasonic testing parameters are significantly depends on microstructural or mechanical properties of materials and the parameters are affected by change in structural properties of materials. To extract the more information from ultrasonic signals, signal processing techniques are the best tools which are using now days. In this paper new technique is introduced to obtain the concentration of aluminium in aluminium material in terms of ultrasonic parameters hardness, velocity, attenuation & modulus of elasticity by using linear regression analysis using Statistical package for Social Sciences i.e., SPSS statistics. The regression equation which is obtained to calculate aluminium percentage is compared with the experimental value of aluminium percentage in the materials. In the present paper the accuracy or reliability of the mathematical model has been estimated. To estimate the aluminium percentage in aluminium this type of model will be very helpful.
Comparative study of positive feedbacks on linear and nonlinear coupled logistic maps
Authors: Rajvaidya Bhakti Parag , Raut V D , Butey Bhavana 
Published: June 2021

Abstract
This is an extended work of the authors on coupled logistic maps with delayed linear, or non-linear nearest neighbor coupling. Here we investigate the effect of positive feedback in the coupled map lattices with update rules on (i) the phase diagrams showing non-zero persistence in the μ-ε parameter space, and (ii) on power law exponents of decay of persistence. We find that while feedback is increased the increased non-zero persistence regions in the phase diagram has no noticeable effect on the power law exponents. We also find that the role played by time lag in the absence of feedback, discussed in our previous work, remains intact even with the introduction of feedback. We offer an extensive comparison of without feedback and with feedback plots.
Ultrasonic analysis of ternary liquid mixture of riboflavin with water and methanol at 288K
Authors: Dange S P , Chimankar O P 
Published: June 2021

Abstract
In the present study, density, viscosity and ultrasonic velocity have been measured for ternary liquid system of Riboflavin with water and methanol at 288 K in the concentration range 0.00 to 0.1 M. These measured values and derived parameters were used to performed molecular interaction study at 2 MHz using ultrasonic interferometer technique. The results of reported study have been thoroughly analysed and eventually interpreted at the possible molecular interaction such as structure making, solute-solvent and hydrogen bonding effect in the liquid solution of Riboflavin with water and methanol.
Preparation and characterization of copper (Cu2+) ions doped Zincaluminoborophosphate (ZnAlBP) glasses
Authors: Krishna J Suresh , Raju D Siva , Krishna V Vinay , Raju Ch Linga 
Published: June 2021

Abstract
The Glass configuration of 40 ZnO + 25 H3BO3 + (x-30) P2O5 + (5) Al2O3: x CuO (0<x< 0.8) have been prepared and investigated by XRD, EPR, Optical absorption and FTIR techniques. Zincaluminoborophosphate (ZnAlBP) glasses doped with Cu2+ ions are prepared using melt quenching technique at 1250 °C for 2h. The obtained glasses are blue in colour with good transparent nature. The XRD result shows that the prepared glasses are amorphous in nature. The UV-Vis spectra of Cu2+ doped titled glasses show a strong broad band at 800 nm which is due to 2B1g→2B2g transition. The room temperature EPR spectra exhibits four weak parallel and one perpendicular component of Cu2+ ions. The g and A values are calculated for all the concentrations of Cu2+ ions and are reported. The number of spins shows the non-monotonic behaviour. The FTIR spectra shows different modes of P-OH, P=O, Zn-O and BO vibrations.
Study of ZnO modified Lithium Borate Bismuth glasses
Authors: Raut V D , Deshpande A V , Rajvaidya Bhakti Parag , Butey Bhavana 
Published: June 2021

Abstract
Quaternary glasses with composition (40-x) Li2O:30B2O3:30Bi2O3: x ZnO have been prepared with x varying from 0 to 6 mol%. The structural investigation of these glasses has been carried out by infrared (IR) absorption spectra. Addition of ZnO in the glass is favorable for the creation of BiO6 units on account of the substitution of B-O bond by Bi-O bond. Changes in density and molar volume in glasses have been studied. Molar volume reduces which is ascribed to the decrease in boron-boron spacing, d<B-B>. Increment in cut off wave length and decrement in. optical band gap energy is observed in Optical absorption spectra with increase in ZnO on account of rise in Non-Bridging Oxygens Electronic polarizability and optical basicity was also studied.
Current progress and comparative study of performance of the energy saving lighting devices: a review
Authors: Gandate Chetan , Parauha Yatish R , Mushtaque Sadaf Gauhar M , Dhoble S J 
Published: June 2021

Abstract
In the present scenario, rare earth activated phosphor materials are important families in luminescent materials, which is useful in various applications. Over the past few years, rare earth activated phosphor has gained a lot of attention from the society and research community due to its exceptional properties such as low cost, eco-friendly behavior, solution process ability, better PL properties, wider range of color tunability, color purity and defects tolerance etc. In this review, we first discuss energy saving lighting devices, after that, we have discussed those methods which are used to synthesize rare earth activated phosphors. We have been focusing on the modification and tailoring of the photoluminescence of phosphors, which may lead to the acquisition of new phosphors with tunable emission colors. In this review, we are discussed recently reported color tunable phosphors. At the end of the review, scope in lighting field, energy saving devices, and future scope also discussed.
Recent progress in phosphate based luminescent materials: A case study
Authors: Dhapodkar Toshi S , Kadam Abhijeet R , Duragkar Arati , Dhoble N S , Dhoble S J 
Published: June 2021

Abstract
The uses of phosphate based luminescent materials are presented in this study in different fields of luminescence. There are different types of luminescent phosphors are available in the field of luminescence such as borates, sulphates, fluorides, sulphides, phosphates etc. From all these phosphors, phosphate-based phosphors shows their potential in almost every field of luminescence in last few years and it becomes a key material in the luminescence especially in photoluminescence, thermoluminescence and mechanoluminescence. These rare earths activated phosphate-based luminescence materials are synthesized with different techniques by means of wet chemical method, combustion technique, sol gel analysis and solid-state diffusion technique etc. which are described in the present article. Consequently, this article chiefly dealing the overview of different phosphate based luminescent materials and modern development and progression in the field of luminescence.
Hydroxyquinoline copolymers synthesis, characterization and thermal degradation studies
Authors: Rathod Y U , Zanje S B , Gurnule W B 
Published: June 2021

AbstractIn the flow research article, we report the amalgamation of a new natural copolymer of 8-hydroxyquinoline-5-sulphonic acid, guanidine, and formaldehyde in the molar proportion 1:1:2 inside seeing 2 M hydrochloric corrosive as an impetus by polycondensation strategy. The copolymer 8-HQ-5-SAGF was portrayed by elemental examination, Ultra-Visible, Infrared spectra,1H and13C Nuclear magnetic resonance spectroscopy. Furthermore, we have examined the non isothermal thermogravimetric examination for assurance of relative warm stability and their mode deterioration, Energy of initiation, frequency factor and request of response was measured by Freeman-Carroll (FC) and Sharp- Wentworth (SW) techniques. Energy of enactment controlled by Sharp-Wentworth and Freeman-Carroll strategies are in acceptable concurrence with one another. The surface component of copolymer is inspected by filtering electron microscopy.
Synthesis and antimicrobial study of copolymer resins derived from p-hydroxybenzoic acid, semicarbazide and formaldehyde
Authors: Nandekar Kamlakar , Gurnule Wasudeo 
Published: June 2021

Abstract
The Copolymer p-HBSF-I resin was synthesized from p-Hydroxybenzoic acid, semicarbazide and formaldehyde with hydrochloric acid as a catalyst in 1:1:2 molar ratio by polycondensation technique. The copoylmer characterization was done with IR and 1H NMR Spectra. The antibacterial and antifungal screening of copolymer p-HBSF-I was done by using a well-known agar diffusion method. The bacterial strains used were Staphylococcus Aures, Bacillus Subtillus, Escherchia Coli, Salmonella Typhi and the fungal strains used were Aspergillus Niger, Candida Albicans. The present study includes the antimicrobial investigation of copolymer resins in order to know the effectivity of semicarbazide group.
A literature review of the research on ferroelectric polymers
Authors: Kumar Vivek , Babu T , Tiwari Balgovind 
Published: June 2021

Abstract
In this work, the research and development of ferroelectric polymers has been reviewed. The main focus is on properties of different types of ferroelectric polymers. Ferroelectrics of ceramic and thin film nature, are widely known for their use in several electronic devices. But the existence of ferroelectricity in polymers has made the ferroelectric polymers to be used in different electrical applications such as sensors, actuators, etc. The main theme of this paper is to report only the existing literature on ferroelectric-polymeric materials.