bluuebunny/crossref_metadata_2025_split huggingface dataset:
Practical aplication of reinforcement remazol dyes on cotton material using fixation abu ash and amylum
Authors: Khaliq A D , Chafidz A , Rahmillah F I , Masruri M I , Hutama H D 
Published: March 2021

Abstract
Remazol is a synthetic dye from chemicals. Remazol can be used by dyeing, dripping or quenching. This dyestuff has water soluble properties, has brilliant colors with good fastness, low affinity. In the coloring process, color requires a fixation process. Fixation process, as a binder or reinforcement so that the color does not fade. Fixation is done with Na2CO3 or soda ash. soda ash or also known as Sodium carbonate, Na2CO3, is a sodium salt of carbonic acid which is easily soluble in air, white powder. soda ash can be used as a reinforcement for reactive type dye batik. By adding soda ash to a reactive dye solution or remazol, this automatic dye can become strong and not fade. After the soda ash fixation process is added starch which has the function to glue the fabric to the dye so that it is strong and does not easily wear off.
Service life prediction of historic timber-framed structures of the Kadariah Palace in Pontianak, Indonesia
Authors: Setiawan N , Prabowo H , Akbar E P 
Published: March 2021

Abstract
Durability is a significant subject when using timber in construction, especially for the historic building aged hundreds of years. The heritage building should be well preserved as a national identity and also as a legacy of humanity. Thus, it is crucial to understand the the building residual service life. It can be used to decide the time when the repair or replacement has to be done. The decay depth calculation shows that the main structural elements will reach the center of the cross-section (75 mm) in 150 years (around the year 1920). The condition threatens the stability and safety of the building. The additional width and thickness to the existing structural elements cross-section and the application of weather shield paint on the surface of structural elements periodically in recent times proved to be effective in maintaining the building remain to stand.
Experimental modelling of segregation on reinforced concrete beam using a graded concrete approach
Authors: Pratama M M A , Nindyawati N , Puspitasari P , Permanasari A A , Prayuda H , Sari U C 
Published: March 2021

Abstract
Segregation is a phenomenon that commonly arises in concrete because concrete is a multiphasic material. The segregation causes the concrete to create non-uniformly distributed along with the height of structural members so that it affects the material characteristics such as strength, stiffness, creep, durability, and structural performance resulting in a higher impact on maintenance costs and shorter structure life. To understand the effect of segregation on the RC beams as flexural elements on experimental works, researchers aim to model the beam underwent segregation using a graded concrete approach. To model this segregated element, a high strength concrete mix will be cast at lower fibre, while a mix of lower concrete strength is positioned at the upper fibre. In rupture stage, the segregated element gained its benefit in load performance due to the greater of the material strength at the bottom fibre. At yield and the ultimate stage, the beam exhibited a decrease in load performance due to the lower concrete strength in the area of neutral axis to the compressive fibre; creating a low resistance in load and stress transfer during the loading. After the yield of tensile rebars, the segregated beam fluctuates in the reading of load and deflection increments towards the ultimate point. With the accumulation of concrete density in the middle to the base of the beam element, interlocking action between the aggregates in the compression fibre has absent. When the beam performs a large curvature, the interlocking force of the material in charge of providing resistance to external forces is drastically reduced.
Analysis of the effect of flow position on homogeneity of lubrication in the blending circulation process using CFD
Authors: Syamsuri  , Lillahulhaq Z , Alim  
Published: March 2021

Abstract
Blending is the process of mixing of Base Oil and Additive to produce lubricating oil with the required specifications/characteristics. One of the determining factors to obtain the desired lubrication oil is the homogenization process. In this study, an analysis of the effect of the inlet position, circulation time, and flow velocity on the homogeneity of the resulting mixture was analyzed. The research method used is the computational fluid dynamic (CFD) simulation method with 2-dimensional (2D) fluent software. The flow that occurs in this condition is turbulent with the turbulent model used k-ε (epsilon). The results show that the upper inlet position within 10 minutes has gotten a homogeneous mixture compared to the lower inlet positions (30 minutes) and the center (20 minutes). Fluid flow velocity also affects the homogeneity of lubricating oil where the speed of 3 m/s within 10 minutes has obtained homogeneous results for all inlet positions compared to the velocity of 1.7 m/s and 2.5 m/s. In addition, the circulation time also affects the homogeneity level where for the lower inlet the circulation time needed to achieve homogeneity about 30 minutes. In conclusion, the longer the circulation time, the more homogeneous the mixture is obtained.
Potential use of graded concrete as structural elements of multi-storey buildings
Authors: Pratama M M A , Abifurrizal S , Novitasari Y , Damayanthi W , Puspitasari P , Permanasari A A 
Published: March 2021

Abstract
Research related to graded concrete is continuedly conducted to create high strength, lighter specific gravity, and lower manufacturing costs. In this study, researchers aim to study the behaviour of structures using graded concrete as a construction material. Two buildings with different slenderness ratios are prepared using ETABS. The results show that the structural vibration time of all models, do not exceed the maximum allowable value. The use of graded concrete provides a significant effect in high-rise buildings so that the high-rise structures behave more rigid in responding to lateral loads. The trend of storey stiffness increase is at the minimum value at the lower level and is gradually increasing on the higher storey level. The application of graded concrete as building materials in multi-storey buildings can be applied in storey level above the 1st floor so that the factors of material characteristics will dominate rather than the behaviour of the structures to create efficient construction. The use of graded concrete can reduce the value of sway in each model. The reduction of the sway gradually increases on the upper floor of the building. This is related to the additional stiffness contributed by the graded concrete of beams against the slabs.
Various current and electrolyte solutions of electroplating for medium carbon steel towards coating performance as corrosive protection
Authors: Setyowati V A , Niam A C , Abdul F , Darto  
Published: March 2021

Abstract
Electroplating is utilized to protect metals from environmental influences. This study aims to determine the effect of solution composition and electric current on coating thickness and to observe morphology with nickel plating. The electrical currents were set in 0.5A, 1A, and 1.5A. Meanwhile, the electrolyte solutions consist of NiSO4, NiCl2, H3BO3, H2O, and were added in different compositions. In this research, several characterizations were conducted to measure the thickness of the coated layer using a micrometer. SEM (Scanning Electron Microscopy) was used to observe the surface morphology. The thickness test is shown that the higher current obtained the thicker coating layer. Moreover, the higher compositions of electrolyte solutions affect more coating layer on the base metal surface. The rough surface was depicted on metal coated in low current. New iron-nickel and iron-nickel-oxide was detected by X-Ray Diffractometer (XRD) as Fe0.64Ni0.36 and NiFe2O4.
Using interactive technology in visualized narration book as a medium to promote hakka blue-dyed in jhanghu community
Authors: Peng L H , Lin Y H , Siswanto I 
Published: March 2021

Abstract
Looking at many products that combine indigo dyeing on the market, the old and new products are continually being introduced. However, there are only a handful of picture books related to traditional craftsmanship and manufacturing. In the literature discussion, we also found that the blue dyeing method was once replaced by modern industrial technology due to the complicated process. In recent years, with the evolution of the times, the awareness of environmental protection has risen, and the advantages of natural environmental protection of indigo dyeing have become increasingly prominent. From plant harvesting, refining indigo to dyeing, no chemical dyes are added. Therefore, let the traditional indigo dyeing technique, which has been in decline for a long time, eliminate the conventional impression and reappear in life with different product appearances. In this regard, the team uses three-dimensional and interactive technology application teaching picture books to allow the public to record the blue dye production process with a flexible, exciting, and plot-style story structure, and a more effective and easily acceptable way of learning technology for young people Ability to absorb relevant knowledge. Besides, in the future, we hope to use this kind of picture book framework to collect, record and preserve Taiwan’s unique traditional techniques in picture books and animation videos.
Investigation of concrete quality using Discrete Element Method (DEM)
Authors: Ma’arif F , Gao Z , Li F 
Published: March 2021

Abstract
This study describes the pattern of concrete damage to compressive and tensile strength on various of concrete quality using DEM (Discrete Element Method). Concrete was design as a uniform material in the three-dimensional analysis. Sphere particle is used to simplified the complex analysis. Laboratory testing is carried out to validate the performance of the DEM in the macroscopic model. Each variant has two specimens, the specimens consist of three different compressions, and the Brazilian splitting tensile test was 20MPa, 25MPa, and 30MPa. The test results show that the DEM analysis can model crack behavior under loads. The model was capable of predicting the performance of plain concrete with different qualities. The stress-strain curve, damage particle, velocity, and mechanical parameter of concrete quality were obtained. Finally, the uniform of spherical particle material is an alternative that can be proposed in the concrete laboratory-scale test modelling.
Black rice flour-based choi pan as an alternative snack for people with diabetes mellitus
Authors: Raissa U P , Palupi S 
Published: March 2021

Abstract
This study aims to: 1) develop the right recipe for an innovative Choi pan made of black rice flour, 2) examine the people’s acceptance on the developed Choi pan recipe, and 3) analyze the nutritional values contained in the black Choi pan. This study employed the R and D research design with the 4D models (Define, Design, Develop, Disseminate), while descriptive statistics were used to analyze the data. The results of this study:1) show that according to Ayudiah Respatih’s recipe, the right recipe for this black Choi pan should contain 50% black rice flour,2) it is shown by the mean value obtained from the test (3.43), in the preference test, it is found that the product is favored by non-trained panelists (3.83), 3) the proximate analysis test results show that the developed Choi pan contains 45.62% water, 1.60% ash, 13.61% protein, 11.57% fat, 4.66% crude fiber, 22.89% carbohydrate, and 251.08 kal/100g energy.
Visual validation of PLC program using virtual simulator
Authors: Badarudin R , Hariyanto D 
Published: March 2021

Abstract
This article discusses the programmable access interface between visual studio and the Siemens PLC simulator (S7-PLCSim). The communication interface adopts S7-ProSim COM object control. By using the S7-Prosim, we can write Microsoft Visual Studio-based software application code to change the PLC input value, read the PLC output value, change the position of the PLC control mode switch, and other controller tasks. Visual studio-based virtual modelling software applications can be used to validate PLC programs in real time. So that virtual lab-based PLC program validation is possible to develop based on Microsoft Visual Studio with a PLC interface using the S7-ProSim COM object.
The effects of product and service quality on repurchase decisions
Authors: Hasanah W U , Murniati D E 
Published: March 2021

Abstract
This study aims to find out several aspects concerning Jogja Paradise Food Court, including (1) product quality, (2) service quality, (3) customers’ tendency in repurchase decisions, (4) the effects of product quality on customers’ tendency in repurchase decisions, (5) the effects of services on the tendency for customers’ repurchase decisions, and (6) the effects of product and service quality on customers’ tendency for repurchase decisions. This was a descriptive quantitative study. The research population was approximately 750customers who purchased items there in a month. The research samples were chosen using incidental sampling technique, while the number of samples was determined using Slovin’s formula with a margin of error of 10%, resulting in as many as 90customers as the research samples. The findings show that (1) the quality of products sold at Jogja Paradise Food Court is in the medium category with a percentage of 71%; (2) the quality of service is in the medium category with 76%; (3) customers’ tendency in repurchase decisions is in the medium category with 86%; (4) there is a positive and significant effect of product quality on customers’ repurchase decisions as shown in the t value of 2.345 at the 0.021 significance level; (5) there is a positive and significant effect of service quality on customers’ repurchase decisions as shown in the t value of 4.247 at the 0.000 significance level; and (6) there is an effect of both product and service quality on customers’ repurchase decisions as shown in the results of Adjusted R2 of 32.7%.
Analysis stage in the development of a virtual laboratory electric motor installation for vocational high schools
Authors: Wati M S , Djatmiko I W 
Published: March 2021

Abstract
The study aimed to find out the design of instructional media which is suitable for practical learning of electric motor installation. It used needs analysis and front-end analysis which was carried out at Vocational High Schools in Yogyakarta. The result showed that the developing two-or three-dimensional media in the form of virtual laboratories was strongly recommended. Virtual laboratories was able to visualize the components according to real conditions. The concepts and work principles of electric motor installations were showed in the form of a two-or three-dimensional simulation. Virtual laboratories was expected to help virtual learning and train students’ independence and competence in practicing electric motor installation.
Case study of electronic fuel injection competence acquisition of students at SMK PGRI 1 Ngawi
Authors: Nasrudi M , Pardjono  , Efendi A , Noviansyah W 
Published: March 2021

Abstract
This study aims to explain the acquisition of electronic fuel injection knowledge at SMK PGRI 1 Ngawi, Namely: (1) achieved the level of knowledge of students, (2) what is the process of understanding electronic fuel injection, (3) how students acquire competence electronic fuel injection, (4) how students try to master electronic fuel injection, (5) What are the attitudes, knowledge and skills of PGRI Vocational students in the EFI field. This research is a type of case study with a descriptive qualitative approach data obtained by using interviews, observation, and documentation. Data is processed using data triangulation techniques. Data analysis using interactive models from Miles & Huberman. The results of the study indicate that: (1) Pencapaian aspek pengetahuan siswa SMK PGRI 1 NGAWI tentang EFI dengan nilai rata-rata kognitif skor 77 (2) the process of understanding student competencies takes place in classrooms and workshops, (3) students gain knowledge about electronic fuel injection independently by reading books, the internet, and the learning process at school, (4) students make efforts by independent learning, group learning, and listening to the teacher’s explanation, (5) The competencies obtained by NGAWI SMK PGRI 1 students can be seen from three aspects, namely knowledge, skills and attitudes. In the aspect of knowledge, students get several competencies, namely: (a) basic material regarding electronic fuel injection, (b) electronic fuel injection sensors, (c) electronic fuel injection maintenance, and (d) how to fix it. In the aspect of skills, students get several competencie
All-Dielectric Metasurface Refractive Index Sensor with Microfluidics
Authors: Zhong Juechen , Ghosh Pintu , Li Qiang 
Published: March 2021

Abstract
Magnetic resonance and electrical resonance can be excited simultaneously by the incident light source in high refractive index all-dielectric metasurfaces. They can manipulate light waves to a certain extent and can be used in many fields. Silicon is widely used in all-dielectric metasurfaces due to its high refractive index and low loss in near infrared range. In this paper, we use silicon nanodisk structure as refractive index sensor and PDMS microfluidic channels as detection channels to realize liquid refractive index sensing. The magnetic resonance peak of the nanodisk structure is selected for sensing. The position of the magnetic resonance is shifted in the transmission spectrum with the change of the refractive index of the surrounding environment. When the refractive index increases, the resonance peak moves towards the long-wave direction, resulting in red shift, and vice versa. In this paper, the shift of resonance peak reaches 230 nm RIU−1.
Investigation of Electrochemical Corrosion Behaviour of 6082 Aluminum Alloy under Simulated Deicing Agent Conditions
Authors: Yang Li , Yang Shoubing , Huang Genzhe 
Published: March 2021

Abstract
In this study, the aluminum alloy of 6082 with different treatment processes (T1 and T6) was tested in simulated artificial deicing agent solution. The polarization curves show that the alloy suffered from pitting attack, the corrosion resistance of extruded sample (T1) is lower than that of forged sample (T6) in the same medium solution. With the increase of chloride ion concentration, the corrosion current density of T1 and T6 samples increased, the maximum corrosion depth increased, and the corrosion resistance of alloy samples decreased. The morphology on the polarized alloys show that the the surface of T1 sample revealed a higher number of pits. And the difference of corrosion resistance between T1 and T6 is closely related to the difference of microstructure.
The Research of Monte-Carlo Method for Aviation Materials Demand Forecast Based on the Life of the Reliability
Authors: Cui Xu , Ai Pengchao , He Jun , Wang Shuo 
Published: March 2021

Abstract
With the rapid development of the aviation industry, the increasing number of missions and the impact of other new circumstances, the contradiction between supply and demand in aviation materials has become increasingly prominent. Consequently, more uncertainty and unpredictability in spare parts’ demand, as well as the absence of accurate value of holding, overstocking and backordering costs, result in traditional inventory control policies ineffective. In order to make better use of the existing stock aviation material resources, it is necessary to study the optimization of aviation materials inventory management. In this paper, the reliability analysis of aviation materials maintenance data is conducted to grasp the occurrence rules of aviation materials failures, determine the failure distribution function, and establish a mathematical model of spare parts guarantee and demand based on stochastic process theory. The Monte-Carlo simulation method is used to calculate the aviation materials demand. The calculation results show that the method can achieve the purpose of controlling the inventory level through the demand under varying guarantee degrees, which makes the management of aviation materials more scientific.
Effect of Laser Strengthening on Electrochemical Corrosion of AA6082 Aluminum Alloy
Authors: Yang Li , Wang Dongxu , Huang Genzhe 
Published: March 2021

Abstract
In this study, the surface of 6082 aluminum alloy was machined by laser heat treatment, and the microstructure and properties of the affected zone of laser surface were discussed by scanning electron microscope (SEM). The experimental results show that the laser treatment has an obvious second phase fine grain strengthening effect on the surface of aluminum alloy. The local hardness of the surface laser action zone has been improved obviously. Combined with the polarization curve data and microscopic corrosion morphology, with the addition of laser, the corrosion resistance mechanism of aluminum alloy has been well optimized, and the number and continuity of pitting pits on the surface of aluminum alloy have been restrained. The intergranular corrosion and the maximum corrosion depth behavior decreased under the corrosion of Cl−. The comprehensive properties of aluminum alloy surface have been effectively optimized under the action of laser heat treatment.the effect of laser heat treatment on the corrosion resistance and the surface mechanical properties of AA6082 aluminum alloy was investigated.
Effect of TiC Nanoparticles on the Mechanical Properties of a K465 Superalloy
Authors: Zhang Litao , Liu Zhenglu , Zhao Qinglong , Jiang Qichuan 
Published: March 2021

Abstract
In this paper, the effects of TiC nanoparticles on the mechanical properties of the K465 superalloy were investigated. The elongation of the K465 alloy was improved by adding TiC nanoparticles without ultimate tensile strength reduction. Adding TiC nanoparticles can also effectively refine grain size and influence dendrite morphology. Moreover, the addition of TiC nanoparticles also led to the change of carbide morphology. The improvement of elongation was attributed to the refined grains and changed the morphology of carbides.
Analysis of Strength and Compression Damage Characteristics of Soil Rock Mixture Based on Geopolymeric Reaction
Authors: Zhang Yan , Zhou Shengjie , Wang Lin , Cao Yuliang , Fan Liang , Hou Jialin 
Published: March 2021

Abstract
Geopolymers was a common means of solidifying soil which can improve the overall strength of the soil. In order to further explore the strength and damage characteristics of the soil-rock mixture under the action of gel coagulation, this paper analyzed the compressive strength of the soil-rock mixture under different stone content through the unconfined compressive strength test. The results illustrated that when the amount of stone was small, the compressive strength decreases linearly with the increase of the amount of stone, and increased with the increase of the amount of geopolymer; According to discrete element method, using PFC2D software, to simulate the microscopic deformation and mechanical properties of the specimen during compression. The increase of stone content would magnify the damage of the soil when it reached the failure, but it did not necessarily increase the overall soil mass numerically. The strength of the soil would be greatly improved when the stone content reached a state that could form a skeleton structure.