bluuebunny/crossref_metadata_2025_split huggingface dataset:
Auxiliary information based generally weighted moving coefficient of variation (AIB-GWMCV) control chart
Authors: Nuriman M A , Mashuri M , Ahsan M 
Published: April 2021

Abstract
Statistical Process Control (SPC) is a statistical technique to accurately determine process performance. It has been widely used in manufacturing industries and services. The most powerful instrument used in SPC is the control chart. It is designed to observe and detect timely assignable causes of the process. In general, the control chart is employed to detect shifts in process location and process dispersion. Monitoring the coefficient of variation (CV) is efficient in SPC when the standard deviation process changes with the mean. Also, the mean itself is expected to fluctuate with time but considered to be in-control. Recently, some studies investigate using auxiliary information to enhance the sensitivity of the CV control chart. This study investigates auxiliary information based CV-GWMA (AIB-GWMCV) control chart by using log-normal transformation to detect the small to large shifts in process CV. It turns out the proposed control chart performs better than the CV-GWMA control chart using log-normal transformation without auxiliary information. Also, a real case is presented to display the application of the AIB-GWMCV control chart. Results show that the proposed control chart is faster to detect shifts in the process CV than the control chart without auxiliary information.
HPLC Method for Simultaneous Determination of Dextromethorphan Hydrobromide, Chlorpheniramine Maleate and Potassium Sorbate in Cough Syrup
Authors: Yuliana T , Gustin S S N , Alamsyah A , Budiman S , Hardian A , Yun Y F , Agma M 
Published: April 2021

Abstract
The development and validation of an analytical method for the simultaneous determination of Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Potassium Sorbate in cough syrup using the High-Performance Liquid Chromatography (HPLC) method have been conducted. The determination was carried out on the simulation sample consisting of three substances and prepared five different concentrations, with three replications for each concentration. The optimum HPLC conditions were obtained using the C18 column, with UV detection at 230 nm The mobile phase of acetonitrile & phosphate buffer pH 2.5 (containing sodium-heptane sulfonate as ion-pair), with a gradient elution system, at a 1 mL/minute, while the flow rate column temperature is set at 35oC. The results showed that the method has met the parameters set in the validation test with the recovery ranged from 98% - 102%, the precision test results (RSD) < 2%, and the linearity (r) ≥ 0.98. The method obtained is quite selective by confirmed identity with the maximum wavelength scanning of each analyte peak by PDA detector. The limit of detection (LoD) for Dextromethorphan-HBr, Chlorpheniramine maleate and Potassium sorbate were 3.13 µg/mL, 0.94 µg/mL and 0.12 µg/mL respectively and the limit of quantitation (LoQ) were 9.49 µg/mL, 2.85 µg/mL and 0.38 µg/mL respectively.
Air Quality Monitoring System in South Tangerang Based on Arduino Uno: From Analysis to Implementation
Authors: Listyarini S , Warlina L , Sambas A 
Published: April 2021

Abstract
Pollution is a major factor in reducing air quality. A decrease in air quality can cause many problems such as global climate change, environmental damage, asthma and lung cancer. In this paper, we present an air quality monitoring system based on the Arduino Uno at Tangerang City. Air quality measured was carbon monoxide (CO), butane (C4H10), particulate matter (PM25) and ozone (O3). The types of sensors used were MQ-131 for the ozone sensor (O3), MQ-7 for carbon monoxide (CO), GP2Y1010AU0F for the particulate matter (PM25), and MQ-2 for butane (C4H10). This tool was built using Arduino and data from the sensor was sent to a Liquid Crystal Display (LCD) which visualized in numeric form. Data collection was carried out at Jalan Cabe Raya Pondok Cabe, South Tangerang. The test results showed the carbon monoxide (CO) had an average concentration of 2.79 ppm, the ozone gas concentration (O3) was 0.08 ppm particulate matter concentration (PM25) was 35.51 µg/m3 and butane average concentration (C4H10) was 35.05 ppm. Based on the data obtained, South Tangerang, Indonesia had a high level of pollution in particulate matter (PM 2 5).
Analysis of water-ethanol-gasoline (RON 88) compositions in one phase substance-using triangular graph
Authors: Sangian H F , Manialup B H , As’ari A , Ibrahim A R , Rombang J R , Lametige J A , Mosey H I R , Tanauma A , Pasau G , Tongkukut S H J , Purwadi R , Neonufa G F , Rorong J A , Sangi M M , Gunawan S , Widjaja A , Tuhuloula A , Thahir R , Sadjab B A , Masinambow V A J , Sriana T , Furqon Z , Agnesty S Y , Rondonuwu S B 
Published: April 2021

AbstractThe present work is aimed at analysing the compositions of the water, ethanol, and gasoline which hasResearch Octane Number/RONwas 88 forming a stable emulsion (one phase) employing a ternary graph. When the mixture process, the blended fuels consisted of water-ethanol-gasoline were successfully prepared in which they were formed in one phase. Ethanol was derived fromArenga pinnataliquor which is locally calledcap tikususing a home-made reflux distillation filled by packing materials. Ethanol obtained were differing their concentration that depended on the column temperature set. It was found that the purities were ranged from 80 to 96% and the higher column temperature was chosen the lower concentration was obtained. Each aqueous ethanol was blended with gasoline to obtain a homogenous solution. For ethanol 80%, compositions of water, pure ethanol, and gasoline were observed at 18, 74, and 8 (%v/v), and 22, 70, and 7 (%w/w). While ethanol 96%, the compositions ratios were 1:22:77 (%v/v) and 1:23:76 (%w/w). The ranges of pure ethanol, gasoline, and water in which they formed one phase solution were recorded at 23-70%, 7-76%, and 1-22%. The work found that substance was in one phase if the wet ethanol keeps being added. When the ethanol composition has decreased the substance was separated into wet ethanol and gasoline. The minimum ethanol dissolved completely into gasoline was of 80%.
IoT based Soil Moisture and Sun Light Monitoring for Smart Planting
Authors: Jonathan  , Widjaja D 
Published: April 2021

Abstract
Plant enthusiasts, entrepreneurs, and farmers usually have more than one plant that needs to be looked after every day. Lack of water and unproportioned sun light can be a serious problem if they have to leave the plant for a long period of time. An Internet of Things (IoT) based automatic remote plant sprinkler with sun light cover was designed to solve this problem. This system eases the users for monitoring the condition of plants without having to be in the field. The system model uses an ESP32 microcontroller, Light Dependant Resistor (LDR), relay, and L298N DC motor driver. In dry soil conditions, the water pump and sprinkler will turn on and water the soil. When the soil conditions are moist or wet the pump and sprinkler will not turn on. When there is intense sun light, the DC motor will pull the curtains to cover the plant. All the data can be monitored remotely via Wi-Fi connection. The results of this work shows that the system works well with 100% monitoring success rate.
Geographically and Temporally Weighted Regression Model with Gaussian Kernel Weighted Function and Bisquare Kernel Weighted Function
Authors: Harianto  , Nugroho W H , Sumarminingsih E 
Published: April 2021

Abstract
The Geographically and Temporally Weighted Regression (GTWR) model is a development of the Geographically Weighted Regression (GWR) model. Estimation of parameters in the GTWR model uses Weighted Least Square (WLS). The purpose of this study is to build two GTWR models using the Gaussian kernel weight function and the Bisquare kernel weight function on the percentage of poor people in East Java Province in 2010-2015. Each weighted function produces 228 different models at each location and time. The GTWR method with the Gaussian Kernel weight function produces parameter estimates at the observation location in the range between 0.7796 to 48.1435. Meanwhile, the parameter estimation of the GTWR model with the Kernel Bisquare weight function ranges from 0.7828 to 48.1444. The two weight functions can model the percentage of poor people in East Java Province in 2010-2015, with R2 values of 98.994% and 98.987%, respectively.
Mental Model of Prospective Chemistry Teachers on Electrolyte and Nonelectrolyte Solutions
Authors: Suja I W , Sudiana I K , Redhana I W , Sudria I B N 
Published: April 2021

Abstract
This study aims to describe and explain the understanding of the three levels of chemistry and the mental model of prospective chemistry teachers on electrolyte and nonelectrolyte solutions. The research population was all 140 students of the Chemistry Education Study Program of the Faculty of Mathematics and Natural Sciences Undiksha on the odd semester of 2020/2021 academic year, with a sample of 114 students. Sampling was done by proportionate stratified random sampling. Data were collected by means of three-level multiple-choice objective tests, each level sequentially to measure understanding of the macroscopic, submicroscopic, and symbolic levels. Data analysis was carried out descriptively. The results showed that students’ understanding of the macroscopic level was 34.21%, the submicroscopic level was 27.54%, and the symbolic level was 29.47%. Only 12.46% of mental model profiles are considered conceptual models, and the remaining 87.54% are classified as alternative mental models, which include 38.95% partially correct and 48.59% specific misconceptions. The data shows that students’ understanding of the three levels of chemistry is very low and most of their mental models on electrolyte and nonelectrolyte solutions are classified as alternative mental models.
Feature Extraction And Sound Pattern Analysis Of Wijaaksara Script
Authors: Gunadi I G A , Rahmawati D O 
Published: April 2021

Abstract
Wijaksara script is a sacred script in the Balinese script structure in Balinese Hindu culture, the sound of this script is believed to create vibrations that are spiritual and magical. In Balinese script literature, Wijaksara script is a combination of the Swalatita script with the Amsa script. Wijaksara script are categorized into several groups, namely (1) Eka Aksara (Om), (2) Dwi aksara (Ang, Ah), (3) Tri Aksara (Ang, Ung, Mang), (4) Panca Aksara (Nang, Mang, Sing, Wang, Yang), and (5) Dasa Aksara (Sang, Bang, Tang, Ang, Ing, Nang, Mang, Sing, Wang, Yang). In this research, several acoustic features of sound were extracted (1) constituent frequencies, (2) waveforms, (3) sound energy. Sound recordings from 20 samples were taken and then extracted to get the constituent frequency using FFT (Fast Fourier Transform). Based on the sound waveform, the waveform and sound energy are obtained. In this study, the acoustic character patterns were obtained, namely Eka, Dwi, Tri, Panca, and Dasa. Aksara is influenced by the sound character of the eka script. The main frequencies for the sounds of the letters eka, bi, tri, and dasa are: 4.37 kHz, 7.22 kHz, 3.97 kHz. 4.18 KHZ, 11.8 KHz, while the sound energy for normal sound pronunciation conditions are: 87.31 dB, 96.72 dB, 83.25 dB, and 80.29 dB, respectively.
Antioxidant activity and total fenol content white saffron (Curcuma mangga Val)
Authors: Maryam S , Martiningsih  
Published: April 2021

Abstract
White saffron (Curcuma mangga Val) is one of the rhizomes that is widely used as traditional medicine or health drinks, because of the presence of antioxidant compounds in the form of curcuminoids. Curcuminoids are compounds that have fenol groups, have the ability to reduce free radicals and can function to repair damaged cells. This study aims to determine the antioxidant activity and total fenol content of white saffron (Curcuma mangga Val) so as to determine the potential of white saffron (Curcuma mangga Val) as an antioxidant. The sample in this study was white saffron (Curcuma mangga Val) powder. Analysis of antioxidant activity using the DPPH method and analysis of total fenol content using the Folin Ciucalceu test. The results of the mean analysis of the samples obtained, the antioxidant activity (IC50) of white saffron (Curcuma mangga Val) was 60.61 ppm and the total fenol level was 87.73 mg/g. From the magnitude of the IC50 value, it can be said that white saffron (Curcuma mangga Val) is a strong antioxidant category, so it can be suggested that white saffron (Curcuma mangga Val) can be used as a functional drink and can be a supplement for degenerative diseases.
Impact of Computer Simulation Assisted Virtual Experiment Module in Learning Hydrogen Atom in Senior High School
Authors: Mardana I B P 
Published: April 2021

Abstract
This study aims to (1) develop virtual-experimental software based on augmented reality as an interactive learning medium, which can be used as a teaching tool to improve the students’ mastery of physics concepts, (2) test the comparative advantage of Hydrogen Atom learning with a virtual approach experiment based on augmented reality with ordinary learning models on senior high school students’ learning outcomes. The research was categorized as quasi-experimental research which used a non-equivalent pre-test post-test control group. The research instrument used was a learning outcome test. The research data were analyzed by using covariance analysis (ANACOVA). The results of this study showed that the learning outcomes of students who studied with the AR-based virtual in the experimental learning model group were higher than students who studied in the conventional learning model group.
Characterization of Silver Nanoparticles on Porous silicon by Laser ablation in Liquid
Authors: Ismael Mohammed Ibrahim , Ali Ghazwan Ghazi , Muhsin Nayef Uday 
Published: April 2021

AbstractIn this article, Porous silicon was prepared using a photo-electrochemical etching method of n-type silicon at etching times (5 and 15 min.). The silver nanoparticles were coated on porous silicon by laser ablation in liquid with energy 400, 600, and 800 mJ. Atomic force microscope images showed an increase of pores size with etching time and it becomes smaller in diameter after laser ablation. Moreover, Scanning electron microscope displayed an aggregates formation when increasing laser energy. The strong peak of absorption of AgNPs found around 415-420 nm. The absorption amplitude increased when laser energy increases. Therefore, the nanostructures on the porous silicon properties play a crucial role in the formation of the homogeneity and this improves the structural stability of PSi layer.
Influence of manufacturing parameters on the mechanical properties of nano-reinforced CFRP by carbon nanofibers
Authors: Santos P. , Maceiras Alberto , Reis P. N. B. 
Published: April 2021

Abstract
One of the most relevant problems of nano-reinforced resins is the uniform dispersion of nanoparticles. This problem is even more relevant when they are involved in the production of laminated composites. In this case, in addition to the agglomeration of nanoparticles, air bubbles are also very frequent during the manufacturing process of laminated composites with nano-reinforced resins. These air bubbles are even more frequent in the manual lay-up process. In this context, this study intends to study some manufacture parameters in order to maximize the mechanical properties. For this purpose, the mixer rotation speed, the dispersion time of the nanoparticles and the vacuum time applied to the system were analyzed in detail. It was found that the mixing time is very dependent on the rotation speed used and there is an ideal vacuum time. A short vacuum time allows air bubbles to exist in the resin, while a long time promotes a decrease in mechanical properties due to the removal of resin in the laminates and, consequently, the fibers are not fully wet.
Removal of Sodium Dodycl Sulfate by using copper doped ZnONanoparticles
Authors: Parveen Dudekula , Khatoon Basheera Hussain , Sravanth Vundavalli Venkata , Raj A. Ajay , Poiba Venkata Rao , Vangalapati Meena 
Published: April 2021

Abstract
In present study Sodium Dodycl Sulfate(SDS), an anionic surfactant by using copper doped ZnO nanoparticles(Cu/ZnO-Np) are investigated. Furthur (Cu/ZnO-Np) were synthesized by using precipitation method in aqeous solution with sulfates of metallic precursors. By using XRD(X-ray diffraction) the crystalline analysis of nanoparticles were observed and by using SEM(scanning electron microscopy) the structure of nanoparticles were observed. For Cu/ZnO-Np the SEM size is 107.7nm. For phase identification and crystalline material XRD was used and to observe chemical properties of Cu/ZnO-Np, studied FTIR(Fourier Transmission of Infra-Red). The maximum percentage removal of Cu/ZnO-Np was found to be 98.5% by varying different conditions by time, dosage, pH, initial concentration and temperature parameters.
Salt additive extraction of cinnamon oil using microwave radiation
Authors: Modi Piyush I , Parikh Jigisha K , Desai Meghal A 
Published: April 2021

Abstract
Inorganic salts have the ability to disturb the plant cell structure which may improve the process for isolation of the essential oil. In the present work, potassium chloride (KCl) was utilized as an additive in extracting cinnamon oil from Cinnamomum zeylanicum using microwave irradiation. The parametric study was performed for the four parameters namely; concentration of KCl salt, extraction time, solid loading, and microwave power. The parameters were then optimized using the Taguchi method and significance of each parameter was determined by analysis of variance. The highest recovery of cinnamon oil was found to be 5.43 (%, w/w) at 10 g KCl salt concentration, 40 min extraction time and 800 W microwave power. This approach has reduced the extraction time, utility requirements and energy consumption thereby showing the greener and cleaner aspects. Moreover, this process would be easily adopted at an industrial scale due to minor changes in existing process.
Application of biosolids (sewage sludge) in agricultural soils: a case study for corn seed LVN10
Authors: Nguyen Kieu Lan Phuong , Lam Van Tan , Giang Lam Van , Thi Van Doan , Hong Le Thi Anh , Tran Thanh 
Published: April 2021

Abstract
Reuse of biosolids aiming to take advantage of its nutrients and micronutrients for arable crops is an economical approach, in which wastes are considered potential resources and bring a variety of benefits. However, heavy metal residuals in sewage sludge have been gaining attention due to accumulation risk and adverse effects on the environment. This study experimented with sludges from Binh Hung municipal wastewater treatment plants treated by anaerobic co-digestion process on corn seed LVN10 to assess corn growth and heavy metals accumulation contents in various components of the corn and the soil. Consequently, within 90 days of using biosolids as treatments 1% and 3%, i.e., the corresponding amount of biosolids over the soil weight, there was no inhibition but growth stimulation for corn growth surveyed. Accumulations of Cu, Cd, Pb, Zn, Ni in roots, stalk, leaves, and mature corn and cultivated soil complied with the national regulations. The effectiveness of biosolids application for corn production in this study will benefit the depreciation of sludge production from municipal wastewater treatment plants and other applications for agricultural plants in the future.
Design and Optimization of Hybrid Interface Joint in a Composite Fan Blade of Aircraft Engine
Authors: Jadhav Prakash , Yella Gruha Lakshmi 
Published: April 2021

Abstract
Fan blades are one of the most important components of an aircraft engine. Bird strikes on fan blades have always been a cause of worry and it can cause slices of birds hitting other parts of the engine which may lead to greater damages. Bird strikes cannot be completely avoided. However, reduction of the impact of a bird on jet engines can be achieved by suitable design and manufacturing, through the simulation analysis. Although current composite blades can withstand the bird strike impact, some delamination failures are still observed on the trailing edge side of the blade, possibly due to vibration bending modes This paper talks about using two fibers in composite blade instead of the current single fiber one. For this to be feasible, two fiber joints at various locations on the blade have to be properly designed. The design criteria used here is the lowest inter-laminar shear strain level at critical joint locations. Suitable size coupon models in FEA with hybrid joints inside are used to simulate the blade bending with appropriate boundary conditions. The coupon models were developed by using the ANSYS APDL and linear static analysis was performed for different repetitive layups and varying layer by layer joint locations. The coupon joint designs with minimum inter-laminar shear strains are shortlisted to be recommended for use in sub-element and blade models.
Production and characterization of wax and grease from waste plastic
Authors: Kumbar P R , Patil V S , Kumbar S R , Kumbar R B , Bhange P 
Published: April 2021

Abstract
World has opened up to start a plastic-free zone. Plastic reusing is the greatest test for us all. During reusing it is important to avoid the potential risk of environmental degradation and hazard. Consuming plastics makes it perilous to the general public. The major focus is to utilize waste grade 4 plastic and generate grease and wax so efficiently that there is no release of harmful oxides (CO2, CO) in the environment and it is very economical. Utilizing waste plastic, the creation of grease and wax is completed. It is valuable to the general public without making the risk to condition. The portrayal of the grease and wax is featured right now. Results show that grease can be utilized for substantial vehicles and with certain added substances, it may be very well utilized for some applications.
Nano crystalline Sr6Sb4NbO18-Energy Material in Solid Oxide Fuel Cells
Authors: John Fergy , Shemim S S , Rinu Sam S 
Published: April 2021

Abstract
Because of the technological applications, Niobium based ceramic is one of the most research interest. Thus, there is numerous research works in recent years on their application as electronic and optical devices. Sintered oxide ceramics, having the required shape, micro structured size can be used for different electronic applications. In this paper, nano crystalline Sr6Sb4NbO18 ceramic was prepared by combustion method. The sample was analysed by the X-ray diffraction, TEM, radio frequency and Impedance spectroscopic studies. The XRD pattern of as prepared Sr6Sb4NbO18 sample reveals, the material has rhombohedral perovskite structure. All the peaks were broad when compared with the bulk, which indicates the reduction in the crystallite size. This is due to the micro strain and nano size in the crystallites. The crystallite size has been calculated from the XRD data, using Scherrer formula and it was obtained as 21 nm. The surface morphology of as prepared sample was studied using TEM and the particle size was found to be 19 nm. The sample was sintered at 1050 °C, obtained the 98 % of theoretical density. An impedance spectroscopic study of the sample carried out with a temperature range of, 200 °C to 500 °C shows that the ions are the main source for the conduction. The reason for the conductivity of the material might be because of the grain and grain boundary effects which can be clearly seen in the impedance plot. The impedance study confirms that the material is a possible candidate to fabricate solid oxide fuel cell.