bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Different Materials on the Mechanical Aspects in the Design of Cyclone Gasifier
Authors: Khor C. Y. , Nawi M. A. M. , Ishak Muhammad Ikman , Wei Z. X. , Rosli M. U.
Published: March 2020

Cyclone gasifier is used as the energy conversion system for the biomass. The design and material selection for the cyclone gasifier is important, which affect the strength of the gasifier during the operation. This research aims to investigate the effect of the various materials to the mechanical aspects (i.e., stress, strain and displacement) of the cyclone gasifier. The mechanical aspects analysis is carried out by using the finite element (FE) based software. The stress, strain and displacement of the cyclone gasifier’s structure was analyzed for various stainless steel materials (i.e., ferritic (FSS), AISI 316, 1023 CSS, 201 ASS and AISI 4130). The finite element analysis revealed the use of 201 ASS experienced highest stress (221 MPa). Lowest strain and displacement were found on 201 ASS and 1023 CSS, respectively. These research findings are expected to be used as the reference for the engineer in the material selection process for the design and fabrication of cyclone gasifier.
Experimental and computational evaluations of the mechanical stresses of banana trunk fibre-reinforced epoxy resin composite in coffee table application
Authors: Ishak Muhammad Ikman , Rosli M U , Khor C Y , Ismail C N , Nawi M A M
Published: March 2020

The banana plant including the trunk is normally disposed after it has produced fruits once in its lifetime and becoming unproductive. Herbicide injection and burning using kerosene are the examples of current disposing method. Those methods are unfavourable owing to bad effects to the environment. Therefore, the unproductive banana trunk through its fibre properties, has a high potential to be used as composite in saving the environment. Three tensile test specimens were prepared with two of them have different length of banana fibres – shorter and longer than 0.5 mm, whilst another specimen has no fibres. The elastic modulus, Poisson’s ratio, and vertical load of 2 GPa, 0.3, and 981 N, respectively, were applied towards numerical models. The results exhibited that the composite with short banana fibre length promoted encouraging maximum and break stress values. Besides, the properties of the composite are well appropriate to be applied in furniture making as satisfactory stress value recorded in the computational analysis.
Synthesis and Characterization of Fly ash based Geopolymer Ceramics: Effect of NaOH Concentration
Authors: Ahmad Romisuhani , Wan Ibrahim Wan Mastura , Bakri Abdullah Mohd Mustafa Al , Sandu Andrei Victor , Mohd Mortar Nurul Aida , Hashim Noratikah , Ahmad Zailani Warid Wazien
Published: March 2020

Ceramic materials have demonstrated impressive performance under severe conditions in a wide number of areas including health, energy and environment, transportation and electronic applications. In order to meet the growing demand of specific properties of ceramics, the use of geopolymer method were introduced as an alternate way by providing new material to fabricate geopolymer as ceramic precursor and moving towards green technology. Geopolymer ceramic was produced using fly ash as source materials. Different molarities of sodium hydroxide solution in the range of 8 M to 14 M were used in the preparation of fly ash geopolymer ceramic. The ratio of fly ash/alkaline solution and alkaline activator were kept constant at 2.0 and 2.5 respectively. Physical and mechanical properties such as density, flexural strength and shrinkage were determined. The optimum flexural strength of 61.6 MPa is obtained at the sodium hydroxide concentration of 12 M with the density of 2.21 g/cm3. The formation of almost fully crystalline phase with appearance of albite contribute to the flexural strength of fly ash geopolymer ceramic. Microstructure image result shows that a presence of pores due to sintering effect and smoother matrix which gives denser structure as supported by the excellent density.
Analysis on Gold Nanorod Interdigitated Elecrtrode Sensor Using Simple Photolithograpic Process
Authors: Adam Hussaini , Subash Gopinath C. B. , Uda M. N. A. , Hashim Uda , Adam Tijjani , Afnan Uda M. N.
Published: March 2020

With the higher demand of preventative healthcare in order to minimize costs and improve healthcare systems, the development and enhancement of sensor technology is vital. It is essential to develop a diagnostic device that can minimize time and lower task in testing, and can effectively reduce manufacturing and delivery costs because of portability of its designs. Here, we briefly describe the fabrication of aluminum interdigitated electrodes and deposition of gold nanorod on the fabricated microelectrode that can detect changes on the modified surface of the aluminum interdigitated electrode. Electrodes made from aluminum was employed for the fabrication because it is the most widely used electrode. Gold nanorod was deposited on the desired surface in order to enhance an enzymatic Response. The use of gold nanorod also enhances the sensitivity of detection due to the decrease of the thickness of probed zone. A simple and facile method for the deposition of gold nanorod colloid was described via a simple photolithographic technique on the interdigitated electrode (IDE). The gold nanoparticles pattern deposition on IDE was investigated by high power microscope (HPM), 3D Profilometer, and atomic force microscope (AFM).
New Development Quantification Methods for Salt Iodine and Urinary Iodine Using Microfluidics Based Nanotechnology
Authors: Ibrahim Nur Hulwani , Salimi M. N. , Uda M. N. A. , Parmin N. A. , Hashim Uda , Afnan Uda M. N.
Published: March 2020

In Malaysia, the first Iodine Deficiency Disorders (IDD) survey was conducted in 1996 and it was discovered that Peninsular Malaysia did not have IDD problem until latter studies showed goitre occurrence of 34.7% in Hulu Langat district and urinary iodine lower than the adequate level of (100-199 ug/L) in Perak and Pahang states (Selamat et al., 2010). Baseline and periodical sampling of children and pregnant woman urine and imported salt commodities for the consumption of the population is mandatory for iodine measurement. Thus, development of quantitative methods of measurement of salt and food iodine is crucial for implementation of the USI program nationwide. In this study, interdigitated electrode (IDE) biosensor, a rapid, sensitive and selective method has been developed to determine the iodine content in both urine and salt. This method includes functionalization and silanization step using 3-aminopropyl triethoxysilane (APTES). The I-V characterization of IDE biosensor was performed using (Keithley 2450), Kickstart software and Probestation. It measures the amount of current flow through IDE which is directly proportional to the concentration of iodine in both urine and salt. Hence, IDE biosensor is proven to be a rapid, selective, sensitive method and can be developed as a new nanotechnology for the elimination of Iodine Deficiency Disorders (IDD) among children and pregnant woman.
Development of Voltage Amplifier Electronic Reader for Multiplex Detection of Two Electrode Electrical Biosensors
Authors: Afnan Uda M. N. , Jambek Asral Bahari , Hashim U. , Uda M. N. A.
Published: March 2020

Amperometric electrical biosensors have small current variations at nano to micro range. There are limited number of electrical based two electrode electronic readers for biosensors are commercial available because of the amplification and noise issues at nano to micro ampere current range. The electronic reader focused on design a voltage amplifier circuit to capture and amplify three different range of current as nano, micro and mili ampere and convert it to detectable voltage range as an output voltage signal. Current input as nano, micro and mili current were flown through 10 K Ω, 10 Ω and 10 m Ω resistors, respectively to convert different current inputs to the similar range in micro voltage. Then, MAX 4238 op-amp IC was used to amplify micro voltage to mili voltage. Arduino Uno circuit was act as the process and control circuit to read the output voltage from the amplifier circuit. Arduino Uno circuit will convert analog signal to digital signal and then the output voltage value is display in the LCD screen. The Proteus 8 Pro software was used to design, simulate and calibrate the amplifier circuit and Arduino Uno circuit. While, Arduino software was used to create a programming code and to upload in Arduino Uno circuit. Start your abstract here.
Nano-micro-mili Current to Mili Voltage Amplifier for Amperometric Electrical Biosensors
Authors: Afnan Uda M. N. , Parmin N. A. , Jambek Asral Bahari , Hashim U. , Uda M. N. A. , Shaharuddin S. N. A. , Adam Hussaini
Published: March 2020

Amplification of nano and mircoampere electrical signal to the detectable range is essential in the biosensor field. This research is mainly focused on design an amplifier circuit to capture and amplify three different range of current as nano, micro and mili ampere and convert it to detectable voltage range as an output signal to the processing circuit. The Proteus 8 Pro software was used to design, simulate and calibrate the amplifier circuit. Firstly, current input as mili, micro and nano current were flown through 0.1 mΩ, 10 Ω and 10 KΩ resistors, respectively to convert different current inputs to the similar range in micro voltage. The MAX 4238 opamp IC was used to amplify micro voltage to mili voltage. LM 358 dual operational amplifier was used to supply virtual ground to MAX 4238 amplifier. The amplified output voltage of three different current inputs as nano, micro and mili were nearly equal to theoretical outputs.
Influence of Various Sand Gradation on Mechanical Properties and Concrete Quality of High Performance Concrete (HPC)
Authors: Muhamad K , Isa N F , Hashim N H , Tusimin Z , Yahya N , Naamandadin N A , Razak R A , Tham P Y
Published: March 2020

High Performance Concrete (HPC) has a few characteristics: high strength, high early strength, high modulus of elasticity, high durability and long life in severe environments, low permeability and diffusion, resistance to chemical attack, toughness and impact resistance and so on. Almost 70 to 80% of the volume of the concrete is occupied by aggregate which have a great impact on characteristics and properties of a concrete. Not only course aggregate but fine aggregate also contributes a lot toward the performance of HPC. Thus, this research studied on the influence of various sand gradations on mechanical properties and concrete quality of HPC. The sand gradation utilized in the study are normal size sand, sand passing through sieve size 1180µm, sand passing through sieve size 600µm and sand passing through sieve size 300µm. The mechanical properties of HPC being studied are compressive strength and splitting tensile strength while the concrete quality of HPC is determined by using water absorption and Ultrasonic Pulse Velocity (UPV) test. The results show that the mechanical properties and concrete quality increased as the size of sand particles decreased. The optimum sand gradation is the sand passing through sieve size 300µm which achieved highest mechanical properties and concrete quality showing the highest result of compressive strength (123.9MPa), splitting tensile strength (8.91N/mm2), lowest percentage of water absorption (0.55%) and highest UPV value (7743N/mm2).
Evaluation and Optimization of Genomic DNA Extraction from Food Sample for Microfluidic Purpose
Authors: Afnan Uda M. N. , Parmin N. A. , Jambek Asral Bahari , Hashim U. , Uda M. N. A. , Shaharuddin S. N. A.
Published: March 2020

Contamination of various food samples became one of the critical issues in food pathogen infection. Food pathogen can be detected by using digital polymerase chain reaction (PCR) and sequencing. These methods were reliable but consuming and take a longer time for detection. The present work describes the innovation to develop a technology to extract double-stranded deoxyribonucleic acid (dsDNA) from food samples and then denatured dsDNA into and single-strand DNA (ssDNA) for further use on the chip using microfluidic device. Microfluidic device is a lab-on-chip device that consist of microfluidic channels that provide paths for biomolecules to flow to individual point of care. DNA extraction is the process by which DNA is separated from proteins, membranes, and other cellular material contained in the cell from which it is recovered. Lysis solution is used in the process of extraction the DNA to break up the cells containing DNA from protein and other cellular materials. This extraction firstly be done in the most labour-intensive in obtaining the DNA biomolecules. Extraction methods may require an overnight incubation, may be a protocol that can be completed in minutes or a couple of hours by using a commercial kit. The disadvantages of the laboratory and commercial kit is due to time-consuming, poor cost-effectiveness, the need to use big laboratory and a complicated process which need an expertise to conduct the experiment and interpret the data. This research is proposed to design and fabricate a microfluidic device that has DNA extraction capabilities. In this research DNA extraction using a commercial kit will be used as a comparison for the quality of the result. The microfluidic device can be used in health care delivery system and will help the doctors in diagnostic process to identify disease of a patient rapidly. Other than that, the output extracted from microfluidic device will be used for DNA probe target interaction for diagnostic kit. The major advantage of microfluidic device is that it consumes less time compared to the conventional chemical methods.
Partially Replacement of Cement By Sawdust And Fly Ash in Lightweight Foam Concrete
Authors: Omar M F , Abdullah M A H , Rashid N A , Abdul Rani A L
Published: March 2020

The rapid growth of population has led to increased demand for fast, affordable and quality housing development. Today, the construction industry in Malaysia has shifted from conventional methods to Industrial Building Systems (IBS). The most commonly used IBS component is precasat concrete with lightweight foam concrete. This study focuses on the main component of foam lighweight concrete, which is a partially replacement of cement by sawdust and fly ash. Among the features of lightweight concrete is density below 1800 kg/m3. Therefore, the objectives of this study is to determine the effects of sawdust and fly ash as part of cement replacement in terms of mechanical properties (compressive strenght) and physical properties (water absorption). In addition, this study also determine the optimum percentage of cement replacement by sawdust and fly ash in building material. The percentage of saw dust and fly ash used in this study as a partial replacement cement are 5%, 10%, 15% and 20%. The results show that increasing the percentage of mix propotion will increase the water absorption rate as well as decrease the compressive strenght of strength. Also, the density and compressive strength of lightweight foam concrete will decrease as the percentage of partial replacement cement increases. According to JKR Standard Specification for Building Works that referred in Malaysia, the minimum compression strength of lightweight foam concrete allowed for hollow blocks is 2.8 N / mm2. The results obtained from this study show lightweight concrete blocks using saw dust and fly ash as part of the cement replacement meet the standards and can be commercialized in the industrial building system development.
Application of Ionic Nano Particles in Fish Processing Wastewater by using Biochemical Treatment: A Short Review
Authors: Kamaruddin Mohamad Anuar , Teik Lim Ewe , Ismail Muhd Nazmi
Published: March 2020

Concerns of microorganisms growth in fish processing plants are crucial to the operation of the fish processing facilities. The presence of toxic microorganisms in the effluent could bring detrimental effects to the environmental and public health as several disease outbreaks could possibly take place with the release of infectious wastewater from the facilities. Environmental Quality (Industrial Effluent) Regulations 2009 published by Department of Environment Malaysia has clearly stated that the discharge limit of total coliform into water bodies that are safe for marine life, fisheries and human consumption must be not exceeded 600MPN/100 mL while for E.coli is not more than 400MPN/100mL. To cope with the laws and regulations, the industry has practiced several methods on disinfecting the effluent such as chlorination or ultraviolet treatment. However, the excessive use of such methods can cause deterioration to the environment as the by-products get released from the effluent are usually harmful to the natural systems of the environment. This paper aims to summarize recent progress on disinfectant methods that have been reported and published in the literature.
Study Of The Utilization Of Carbide Waste And Fly Ash On Geopolymer Paste
Authors: Bayuaji Ridho , Putri N S , Ming Liew Yun , Mohd Mortar Nurul Aida
Published: March 2020

Portland cement is made of the main ingredients are limestone / lime are included in natural resource that is not renewable. So that needs holding replacement with environmentally friendly materials one of which is of geopolymer concrete. Fly Ash is the waste coal combustion products also include natural resources that can not be refurbished Based on data obtained from PT. Z, carbide waste generated in a year on average around 1978.72 m3, it can be put to good use for waste carbide itself has a high CaO content. The composition of the material used in this study was 100% waste carbide, carbide waste 50%: 50% fly ash, as well as 100% fly ash and the activator used as NaOH and Na2SiO3. This study aims to determine how much influence the utilization of waste carbide and fly ash in geopolymer paste in the testing setting time, compressive strength, porosity, UPV, and permeability. The highest compressive strength besides there on the composition of a 100% fly ash is also present in 50% of waste carbide composition: 50% fly ash with activator ratio of 0.5 at the age of 56 days amounted to 39.59 Mpa. The use of fly ash in geopolymer still can not be eliminated 100%, due to the utilization of waste carbide can only be used as an additive or filler.
Analysis of the connection of a nickel-chromium alloy with dental ceramics after aluminum oxide abrasive blasting
Authors: Czepułkowska W , Wołowiec-Korecka E
Published: March 2020

Fixed prosthetic restorations in the form of ceramic crowns or bridges are characterized by good aesthetics and durability. The most important turn out to be the mechanical attachment of the ceramic material in the unevenness of the metal, formed after abrasive blasting. The aim of this research is to investigate the impact of abrasive blasting of a nickel-chromium alloy on the covering the unevenness with ceramics. In the research was used a Ni-Cr alloy (Heraenium® NA, Hera). The metal surface was blasted with alumina of variable size (50, 110 and 250 µm) and pressure (0.4 and 0.6 MPa), which was then fired with ceramics in the form of 2 layers of IPS Classic Opaque (Ivoclar Vivadent). Samples were hot mounting and cut to obtain a cross-section of the connection. The samples was examined under a Scanning Electron Microscope. The results show the presence of air bubbles at the metal-ceramic interface and in the layers of ceramic material. The photographs show a difference in the appearance of the unevenness of the metal surface by comparing samples after blasting with an abrasive of different sizes. No significant differences in the appearance of metal roughness are observed when comparing samples after treatment with the same grain size and different pressures.
Numerical simulation of phase transformation during gas quenching after low pressure carburizing
Authors: Krupanek Krzysztof , Sawicki Jacek , Buzalski Victoria
Published: March 2020

Low pressure carburizing followed by high pressure gas quenching is often applied to steel elements in order to increase their strength and durability, but undesirable distortions are also formed due to this process. In order to minimize these distortions, the Vacuum UCM furnace manufactured by SECO/WARWICK conducted by single piece flow method is proposed. A refined simulation that describes the quenching phenomena with enough accuracy can reduce the project and optimization costs as it replaces the trial and error method. The goal of this study was to create a computer model that can predict the behaviour of the phase transformations that occurs at 4D quenching chamber after low pressure carburizing in single piece flow technology. First, an investigation about the simulations that has been developed in this area was done. Based on physical phenomena involved in this process, a numerical scheme was created; The numerical scheme was applied to the real steel element that was submitted to the single piece flow technology process; The numerical simulation was compared with the experimental data. As a result, a numerical model able to simulate phase transformation after complex chemical-heat treatment in the single peace flow technology was obtained.
Automatic Gate System Based on Water Flow Within the Intake of a Micro-Hydro Power Plant
Authors: Pangaribuan P , Aprillia B S , Wibowo A S
Published: March 2020

The micro-hydro power plant is an alternative to provide electricity especially in regions that are far from the PLN network. The micro-hydro power plant uses water flow to generate electricity. The micro-hydro power plant uses a gate that is utilised to distribute water to the turbine. However, the watergate is commonly controlled manually which results in drawbacks such as unfavourable stabilization and the need for direct monitoring that requires lots of constant expense as well as labour. The objective of this research is to make equipment that can work automatically in substituting a labourer’s role in opening and closing the watergate according to the required water flow. A water flow sensor is used to measure the water flow, the result of the sensor reading is carried on to microcontroller (set up as Fuzzy Logic Control) and Controler sends the control signal to the actuator (DC motor). The Fuzzy Logic method as the watergate controller is used as the research’s prototype system. Based on the data acquired by the research that has been done, the system is oscillated towards the change of the water flow. However, it’s capable to approach the set value point. It can be seen from the water flow trial with a set point of 3 L/min the steady-state response of system undergoes at range of 2,92 L/min–2,95 L/min and with a set point of 3,5 L/min, the steady-state response of system undergoes at range of 3,44 L/min - 3,47 L/min.
Design of Automatic Switch System of Residential Load From Solar Cell and Power Plant Resources using Neural Network
Authors: Silalahi D K , Aprilia B S , Priharti W , Kumillayly K , Saidah S
Published: March 2020

Residential loads are electronic equipment that is often used at home. Residential loads are supplied from two sources, they are solar panel and the State Power plant. Selecting the supply load source, so an automatic switch system is needed from the load. Optimizing residential load resources and avoiding overloading, load balancing techniques are needed. The switch system uses a relay, determined by the solar panel power output. This research discusses the design of automatic load switch systems for residential loads from solar panels and State Power plant using Artificial Neural Networks (ANN). ANN control system that is arranged using ANN Backpropagation consists of 4 inputs, four hidden layers, each consisting of 4 neurons and one neuron in the output layer. In this research, to determine the network that has been formed to provide changes of load. The results of testing that the parameters used to get the smallest error rate in the process of setting an automatic power load switch is best to use a number of repetitions of 2000 times with an error percentage 5.3%. Artificial Neural Networks can experience convergent failure or not close to output because the initial guess is not good. Initial experiments with actual solar panel data with as many as 98 data produced non-convergent output values. The solution to improving the initial experiment is to simplify learning data 40 data produces convergent output.
Coil Inductance Design for Low Power Hybrid Wireless Power Transfer
Authors: Kurniawan T A , Gumilang R B , Wibisono G
Published: March 2020

This paper presents a coil inductance design for low power hybrid wireless power transfer (WPT). The proposed coil inductance design of transmitter and receiver circuits of 7.1 μH are designed using handmade copper wire structure. Several coils with the variations of wire diameters, coil loop radius, and numbers of loops are proposed to find optimum structure in the low power hybrid WPT. The optimum coil structure is obtained at wire diameter of 0.5 mm, 2.25-inch coil loop radius and 1 MHz operation frequency. The measured transceiver coil design has exhibited peak power transfer efficiency (PTE) of 33.1% at 1 cm distance between Tx and Rx. Therefore, the proposed coil design is applicable to low power hybrid wireless power transfer circuits.
Simulation and Analysis of ANFIS (Adaptive Neuro-Fuzzy Inference System) for Music Genre
Authors: Pratama A H , Dwiono W , Tamam M T
Published: March 2020

Music comes in many different genres and styles according to its content, which is easy for a human listener to distinguish but hard for a machine to do. This limitation encourages the creation of a system that can help a computer to classify music genre better. This paper proposed a simple method that can classify music genre on a classical, jazz, pop, and rock using frequency analysis feature extraction and ANFIS classification method. There are two types of ANFIS model, which is model A and model B. The most accurate model, is model A with an average accuracy of 53,33% across all genre. The best model for single genre classification is Model B with 80% accuracy for Classic type.
Applying Data Mining to Analysis of Mismatch Between Education and Labor Market in Indonesia
Authors: Tentua Meilany Nonsi , Winarko Edi
Published: March 2020

One of the labor problems in Indonesia is the occurrence of mismatch (incompatibility between education and job). The incompatibility of education and job (labor market) can be categorized into several criteria such as vertical mismatch, horizontal mismatch, overqualification, under qualification, over skilling, under skilling, credentialism and economic skills. In several countries, analysis of mismatch between education and labor market can be used with several methods such as the Maximum Likelihood equation, the Mincer-type income equation, and the use of clustering algorithms in data mining. Indonesia can adopt a method of measuring the mismatch between education and labor market which suitable with the condition in Indonesia. The use of the K-Means algorithm or the hierarchical clustering algorithm will be able to see how much mismatch is occurring in Indonesia. Clustering is carried out referring to the Republic of Indonesia’s Presidential Regulation No. 8/2012 and the Indonesian Classification of Work (KBJI).
Logical Acquisition in the Forensic Investigation Process of Android Smartphones based on Agent using Open Source Software
Authors: Aji Mukhlis Prasetyo , Hariyadi Dedy , Rochmadi Tri
Published: March 2020

Smartphones have an architecture with integrated components. Maintain the process of procuring digital goods on smartphones when asking for special assistance. According to the National Institute of Standards and Technology the process of procuring digital evidence on mobile devices There are 5 levels of acquisition: Manual Extraction, Logical Extraction, Hex Dumping / JTAG, Chip-Off and Micro Read. Which means buying digital evidence using logical acquisition methods or logical extraction still approved in SNI ISO 27037: 2014 also supports the process of procuring logistical permits in Special requirements, limited space. Dengen uses the live procurement method for logical acquisition on smartphones using AFLogical OSE can be obtained digital proof in the form of Contact List, Call Log, SMS and MMS. The use of digital proof Larons can be obtained through basic data from the application installed on the smartphone.
The Stemming Application on Affixed Javanese Words by using Nazief and Adriani Algorithm
Authors: Soyusiawaty Dewi , Jones Anna Hendri Soleliza , Lestariw Nora Lestari
Published: March 2020

The Javanese language has various forms of affixed words. It makes people from other regions find it difficult to understand the Javanese language. One of the ways to understand the Javanese language is by studying and understanding Javanese vocabulary in the Javanese language dictionary or learning directly from ones who master the Javanese language. Both offline and online dictionaries have not been able to translate affixed words. This research used Nazief and Adriani Algorithm to find out the stems/root words in the Javanese language. The objective of this research is to apply the Nazief and Adriani Algorithm in stemming affixed words in the Javanese language. The subject discussed in this research is the application of stemming affixed Javanese words by using Nazief and Adriani algorithm. The stages started with identifying the affixes in the Javanese language. Nazief and Adriani algorithm has five steps those are detecting words that have affixes, cutting words that contain inflection suffixes, derivation suffixes and derivation prefixes, and last recording. The result of this research is a stemming application for affixed Javanese words that applies Nazief and Adriani algorithm method. Based on the accuracy test, it appears that 93.6% of words are accurate from the total of 219 words tested.
Design of Pond Water Quality Monitoring System Based on Internet of Things and Pond Fish Market in Real-Time to Support the Industrial Revolution 4.0
Authors: Junaidi A , Kartiko C
Published: March 2020

Pond cultivation is one of the contributors to foreign exchange and employment in Indonesia. The results of pond aquaculture production in Indonesia, according to statistical data in 2016, amounted to 3,012,467 tons, and the area of fish ponds in Indonesia in 2016 was 674,135 ha. The factors that lead to crop failure are illness, theft, poor water quality, and natural disasters such as floods. This research provides a solution called the Internet of Things Ponds (I-Tamb). I-Tamb applies the Internet of Things (IoT) technology to monitor water quality and the pond environment by installing several sensors. This study also aims to reduce crop failure and make it easier for farmers to market their crops. The cloud server receives sensor data in real-time. I-Tamb Apps produces information that can be used by farmer farmers as material for decision making. I-Tamb also facilitates the sale of crops in the form of a marketplace called the I-Tamb Marketplace. The output of this study is the design of an IoT-based pond water quality monitoring system on mobile and web applications.
The Effect of Olive Oil Composition on The Staining Quality of Klowong Batik Wax
Authors: Dulmalik  , A Chafid Z , Setiadi H , Khaliq F N
Published: March 2020

Batik is visual art that integral to the cultural identity as well as illustrates the life values upon which the life of the community is laid. It uses a technique of wax-resist dyeing applied to whole cloth. This research aims to know the composition of olive oil that required on batik Klowong and to know its effect on the results. The research used both qualitative and quantitative methods such as ingredients measurement technique, questionnaire distribution and voter calculation. The wax for batik Klowo ng consists of olive oil, resin, and white paraffin. The beeswax is an independent variable that is varied in the composition for five different samples (10 grams, 20 grams, 30 grams, 40 grams, 50 grams). The sharpness of the motifs is visually analysed by six respondents. The results showed that sample D and E have better quality than the other samples. While sample A has the highest level of motifs sharpness.
Ultrafiltration of Laundry Wastewater Using Natural Zeolite-PVA Hybrid Membrane
Authors: Ma’ruf A , Fathoni M A S Al , Purnawanto A M , Astiyani I
Published: March 2020

The laundry wastewater produced by laundry service becomes a pollutant of the water. The main characteristics of laundry wastewater are a high value of BOD dan COD. This research is aimed to study the utilization of ceramic hybrid membranes for laundry wastewater treatment. The ceramic hybrid membrane was produced from natural zeolite that coated with polyvinyl alcohol (PVA). The results show that the average percentage of the decreasing value of BOD reaches 83.37% and the average percentage of the decreasing value of COD is 89.86%. Based on turbidity, the higher rejection is obtained at the pressure of 5 bars with the value of rejection of 96.85%.
Characterization and ultrasound-assisted activation of Indonesian natural zeolite from Cikalong West Java Province
Authors: Pamungkas Regawa Bayu , Djaeni Mohamad , Jos Bakti , Wancuh
Published: March 2020

Natural zeolite activation from Cikalong, Tasikmalaya Regency, West Java Province, Indonesia, has been investigated experimentally. The activation process is carried out with a solution of sodium chloride (NaCl), which is utilized by ultrasound cavitation. The purposes of this research are to determine the effect of variation of process variables on the physical-chemical characteristics of zeolites. There were two variables studied, namely; sonication time and NaCl concentration. The study was conducted with the one factor at a time (OFAT) method, which is observing responses to changes in one variable at other constant. The range of sonication time of 20 - 60 minutes, while the NaCl concentration is 0.25N - 4N. Natural zeolites and activated zeolites are then characterized using SEM, XRF, FTIR, iod number, and cation exchange capacity to test their physical-chemical characteristics. Characterization results showed that activated natural zeolite had better quality than natural zeolite. The results of the SEM analysis showed the crystal type of natural zeolite minerals in the form of elongated crystals and others, which indicate the shape of quartz and mordenite. XRF analysis results prove that the elements of Ferrum, calcium, magnesium, and potassium are cations that can be exchanged with other metal elements. The results of the volumetric analysis showed an increase in iodine number and cation exchange capacity, along with an increase in sonication time and decreased along with the increasing of NaCl concentration. Based on these properties, zeolites have excellent performance as an adsorbent.
Analysis of Flood Discharges of Serayu River at Serayu Barrage using HSS Gama I and Nakayasu Models
Authors: Marhendi Teguh , Fathurohman
Published: March 2020

Serayu River, located in the central of the Java island, is one of the largest rivers in the island. The length of the river to the control point of the Serayu barrage is 118.276 km and the basin areas is 3001.73 km2. The aim of the research was to analysis flood discharge in the Serayu river at Serayu Barrage. The analysis of flood discharges on the Serayu River would use the HSS Gama I and Nakayasu models. The result of research shown that f flood discharges using the Nakayasu model Qp = 18.833 m3/sec and HSS Gama I model Qp = 59.953 m3/sec. by using rainfall intensity of 7.431 mm / hour, the peak discharge with the Nakayasu model Qp = 139.156 m3/sec and HSS Gama I model Qp = 445.509 m3/sec.
Effect of Combination of Steel Fibre and Silica Fume on the Mechanical Strength of Concrete
Authors: Sofyan M , Wicaksono B , Irlan A O
Published: March 2020

Concrete currently consists of several types. Among them are Fibrous Concrete, Lightweight Concrete, SCC Concrete, Hollow Concrete etc. All have advantages and disadvantages to each. The use of various types of concrete is adjusted to the needs of construction. In this research, fibrous steel concrete with a combination of silica fume will be the main object to be studied. So far, fibrous concrete has been actively studied in various countries. From the results of previous studies, fibrous concrete can improve the quality of concrete, especially reducing the brittle nature and initial cracking in concrete. While Silica Fume can increase the compressive strength of concrete. The main objective of this study to determine and understand the mechanical properties of concrete with a combination of steel fibre and silica fume such as compressive strength and split tensile strength. The percentage of steel fibre percentage used in this study is from 0 to 3 per cent, while the percentage of silica fume used is l0 per cent by weight of cement. The results of a study are the optimum compressive strength is in the DFl variation with the percentage of silica fume l0 per cent and 0 per cent steel fibre. The use of steel fibre combined with silica fume does not significantly affect the compressive strength. Although it tends to decrease the compressive strength. The strength of tensile strength obtained ranges from 11 to 14 per cent of the compressive strength.
Shear Strength of Reinforced Concrete Beams Strengthened with Near Surface Mounted Steel Plates
Authors: Thamrin R , Haris S , Zaidir
Published: March 2020

Near surface mounted horizontal steel plates was applied to study the contribution of this strengthening method on the shear capacity of reinforced concrete beams. Specimens were nine reinforced concrete beams without stirrups consisting of three control beams and six beams strengthened with steel plates. The test variables were the ratio of the longitudinal reinforcement and the position of steel plates in the vertical direction of the web side of the beam. The specimens were loaded up to failure using a four-point bending test. The contribution of steel plates on the shear capacity was observed by monitoring the ultimate load and deflection of the beams. The test results show that the shear capacity of beams strengthened with steel plates 17% to 50% higher than the control beams depending on the position of steel plates and the ratio of longitudinal reinforcement. It was also observed that the ratio of longitudinal reinforcement influences the failure mode of the beams.
Effective Performance Evaluation to Estimate Cost and Time Using Earned Value
Authors: Susilowati F , Kurniaji W M
Published: March 2020

The data from Badan Pusat Statistik (BPS) Indonesia, show that the development sector in the Yogyakarta region is changing rapidly, especially with the construction of new airports in the region. That demands the effectiveness and efficiency of cost and time in every construction. It requires supervision, evaluation, and performance control in the construction process. In this effort, this research discusses more detail about the calculation of construction project performance using the earned value method. This research conducted on an integrated development project consisting of malls, hotels, and apartments in Sleman, Yogyakarta. The research data collection was carried out by direct observation and analysis of supporting project data. The data obtained were processed and analysed using the accepted value method. The results of this study indicate that at the end of the review, the Schedule Performance Index (SPI) obtained a value of 0.58. Project progress in the field shows that the project has a 41.48% delay. It can see from the initially planned project of 99.06%, but at the time of review, the realisation was only 57.22%. In terms of costs, the Cost Performance Index (CPI) is 1.25. It shows that the costs incurred during the review are still less than the existing budget plan. At the end of the review period, the estimated final project costs are obtained, both direct and indirect costs. With the tendency of project performance at the time of review, the value is still less than the project budget, while the estimated time of project completion will be longer or late at around 56.52% of the planned schedule.
Macroscopic Flow Models of State Highway Midblocks under Mixed Traffic Flow Conditions: Ramon Magsaysay Boulevard Case Study
Authors: Santos M S Delos , Alzona A R , Taguba M A , Vahdanipour C M
Published: March 2020

Macroscopic flow modelling has been fundamentally used to characterize and predict the traffic flow parameters of a continuous road utilizing the analogy for one-dimensional fluid flow. In the Philippines, Ramon Magsaysay Boulevard is a major arterial road that links Manila City to various important cities in the Metropolis. Due to its noticeable deteriorating performance in addressing the increasing traffic flow demand, this work investigated the corridor capacity and characterized the key traffic elements along the major mid blocks using Greenshields model. It is assumed that road users behave uniformly and continuously distributed over the highway to choose a path to minimize their total travel time based on instantaneous traffic information. Investigation shows volume demands exceeding the design traffic capacities equivalent to 0.7429, 1.7959, 0.7226, and 1.4726 VCR ratios.
Fresh and Hardened Properties of Self Fiber Compacting Concrete (SFCC) Incorporated with Zeolite and Nylon
Authors: Afriandini Besty , Monika Fanny , Saleh Fadillawaty , Prayuda Hakas , Cahyati Martyana Dwi , Djaha Siti Isnaini Kurniawati
Published: March 2020

This study discusses the use of zeolite waste and nylon fiber which are used as added material in making concrete. The type of concrete used is self fiber compacting concrete (SFCC). Self-Compacting Concrete (SCC) is a type of concrete that emphasizes a high enough workability value so that the concrete can flow and solidify itself during the casting process. In this study, fresh and hardened properties will be tested. The fresh properties tested consisted of slump flow, T50, V-Funnel and L-Box while the hardened test of concrete consisted of compressive strength, splitting tensile strength and flexural strength. Nylon fiber is used as much as 1% of the weight of cement with length of 50 mm, while zeolite ash is used as a substitute for cement with variations of 5%, 10% and 15%. The purpose of this study was to determine the effect of nylon and zeolite ash variations on fresh and hardened properties of self fiber compacting concrete. The results show that using these two additional materials can be applied to self-compacting concrete because it meets predetermined standards for the fresh properties of concrete. In the hardened properties of the mixture of 5% zeolite produces higher compressive strength, splitting tensile strength and flexural strength than other variations. It can be concluded that the content of 1% fiber and 5% zeolite ash instead of cement is the optimum level and suitable for self-fiber compacting concrete.
Optimization of the compressive strength of hair fiber reinforced concrete using central composite design
Authors: Santos F D , Taguba M A M , Alzona A R , Basada R C S , Elbit J M A , Nones G L , Olido K P M , Ramos E U G
Published: March 2020

In society today, improper waste disposal brings about numerous problems. One of the most common residual wastes found in the municipal solid waste is human hair. This waste, which is evidently continuing to accumulate in disposal streams poses a threat if not disposed properly. Several studies have been done in the search for possibilities of incorporating hair to construction materials. In this study, the compressive strength of Hair Fiber Reinforced Concrete (HFRC) was studied aiming to find the combination that would yield the optimum compressive strength. A parametric study on the effect of amount of hair (1%, 2% and 3%) as well as length of hair strand (0.5-inch, 1 inch and 1.5 inch) on the compressive strength of HFRC was done. The results of the parametric study were used to find the optimum compressive strength. Utilizing the Central Composite Design (CCD) of Response Surface Methodology (RSM), a mathematical model was produced relating the parameters and the combination of parameters that would yield the maximum compressive strength. Based on the results, the mathematical model obtained a Coefficient of Regression of 0.9807 showing that the probability plot of the residuals fits the regression line. As generated by the mathematical model, a combination of 3.2% amount of hair by volume of concrete and a hair strand length of 0.752 inch will yield an optimum compressive strength of 38.15 MPa.
Evaluation of the implementation of the motorcycle lane based on the riding experience
Authors: Kurniati T , Purnawan  , Yosritzal  , Putri E E
Published: March 2020

Currently, two-wheeled vehicles or motorcycle dominate more than 80% of motorised vehicles in Indonesia. A large number of motorcycles result in complicated traffic operations and reduced levels of safety. Lanes separation is the best engineering solution to overcome this problem. Several cities in Indonesia have implemented special motorcycle lanes. The results of the study stated that this program was not successful. This paper tries to evaluate the application of motorcycle lanes in terms of the user’s riding experience. The Sleman Outer Ring Road in Yogyakarta which has implemented a special motorcycle lane is the location of this study. Data collection was carried out through online questionnaire interviews. Respondents provide answers on a choice of four (4) scales, namely, strongly agree, agree, disagree, and strongly disagree. The method of analysis used for evaluating the use of a motorcycle lane is the descriptive statistical method and the chi-square test. Based on the experience of riding on an exclusive motorcycle lane, assessment of the special motorbike lane geometric and traffic flow is good.
Main Task and Functions Stakeholders Institutional to Improve Safety Culture in Construction Sector
Authors: Machfudiyanto R A , Latief Y , Suraji A , Sagita L
Published: March 2020

OSH culture cannot be carried out if the existing institutional scheme is not strong enough or the institutional authority possessed is insufficient in making improvements in the construction sector, so it can be identified Institutions / institutions / organizations / stakeholders that must be involved in OSH institutions to build a Safety culture. The purpose of this research is to find out the main tasks and functions of each stakeholder to form a strong institution in the construction sector. Analysis methods used are using benchmarking, literature studies and validation of safety experts. The results of this study are that the stakeholders identified include the Occupational Safety and Health Services Company (PJK3), DK3N, the Committee for Occupational Safety and Health (P2K3), the Ministry of Manpower, the Director General of PPK and Safety, the Directorate of OHS Norms Supervision with Main Tasks and Functions that have been identified to enhance Safety Culture in the Construction sector.