bluuebunny/crossref_metadata_2025_split huggingface dataset:
Morphological and Permeability Fraction of Mixed Matrix Polysulfone Membrane on Batik Palembang Wastewater Treatment
Authors: Yuliwati E , Elfidiah  , Melani A , Porawati H 
Published: March 2021

Abstract
High performance polysulfone (PSf) membrane has been prepared for treating of batik palembang wastewater. Many investigations attempted the use of polysulfone (PSf) membranes to filtrate dilute contaminant in textile wastewater. The matrix membrane is a mixture of PSf which is produced by adding inorganic materials to obtain a polymer that functions to manufacture the membrane by increasing hydrophilicity and impurity resistance. MMM were fabricated from a dope solution containing PSf/LiCl/DMF at different additives composition. Antifouling properties of membranes could be enhance with 0.0 - 10 wt.% LiCl that has been added into dope solution. Pure water permeation flux analysis (PWP), AFM and FESEM. From the results of research on FESEM, the PSf / LiCL membrane showed a fairly symmetrical cross-sectional structure containing two layers. The layers of the tiny finger-like structure on the edge of the perforated fibers and the holes like the larger fingers are mixed with the macrovoid layer in the middle section. PWP flux is not proportional to mean rough outer surface but higher water permeation. Therefore, PSf/LiCl exhibited a better performance that resulted a much lower fouling tendency than the naked membrane in batik Palembang wastewater treatment.
Smart Glove for Deaf
Authors: Arrosida H , Sudaryanto A , Setyawan S B 
Published: March 2021

Abstract
Smart glove is used to help deaf to interpret their communication. This tools is an interesting topic to be explored because its need improvement for the feature that user friendly and easy to used. In this paper, flex sensor and accelero-gyro is used. By using this tools, all of the sign language will be interpreted based on system database that registered before. Then, all of data will be displayed as text in the smartphone. The results prove that the proposed method can interpret the language system correctly.
Power Factor Correction Using Programmable Logic Control Based Rotary Method
Authors: Prasetyo Y , Hidayatullah N A , Artono B , Danu S B 
Published: March 2021

Abstract
The power factor value of an induction motor is low. This power factor value is due to the large reactive power. Therefore, it is necessary to add capacitors to improve the power factor. The addition of this capacitor uses a capacitor bank with the rotary method. This rotary method is expected to be able to improve the low power factor. The method used is to determine the set point of the desired power factor. Then this method will add the value of the capacitor bank if it does not meet the set point. If it exceeds the set point value, this method will reduce the value of the capacitor bank. For programming this method using Programmable Logic Control. Programmable Logic Control can perform real time monitoring. The results of the test method showed that the capacitor bank worked to improve the power factor optimization. From the power factor of the drilling machine 0.54 to 0.86 in the test. Further developments can make capacitor sizes smaller and more varied in order to optimize the power factor.
Design of Adaptive DC Power Supply with Microcontroller Based Cuk Converter Circuit
Authors: Ningrum H N K , Prabowo G , Haryo R J K , Winarnoand B , Safi’i M 
Published: March 2021

Abstract
Nowadays, the need for equipment sourced from DC power supplies is increasing. One of the DC–DC converter topology that can be DC source isCukConverter. Currently, we need an adaptive power supply that can generate current and voltage according to the power required by the load automatically. In this research, the Cuk-Converter circuit is driven through the Arduinonano as a pulse generator and circuit control system. The microcontroller has set a minimum current of 520mA to charge the battery. The test was carried out with a 12 Volt DC battery source, the output of the Cuk-Converter was a 3.7 Volt battery with a capacity of 50,000 mAh and 3Ah, and a 12 Volt 3 Ah accumulator. The output of the Cuk Converter is set in the range 2-19 Volt DC. The results show that the Cuk-Converter can charge the test battery with a minimum current of 520 mAh and a duty cycle in the range of 27-50%. This result performed the average error of the circuit and calculation was 13.9%.
Design the Implementation of Monitoring Approach Light Runway Based Microcontroller and SMS A Gateway on the International Airport
Authors: Kustori  , Faizah Fiqqih , Suhanto  
Published: March 2021

Abstract
Their technician in monitoring approach light at the international airport, because the approach light far from power house and the location is difficult to reach especially on approach light. Their final task, it uses Microcontroller as a media control and sms the gateway as communication media, methods to display results of monitoring using wonderware to be shown on a computer or a pc and for communication between pc or computer with Microcontroller using cable usb to serial. The results showed for monitoring flame light die approach could use pc or computer and technicians this method performance becoming more efficient.
The Effect of Cylinder Head Variations on the Mixture of Bio-Oil and Diesel Fuel on The Noise Value, Specific Fuel Consumption, and Gas Opacity
Authors: Aminudin A , Nisa NIF , Susanto F , Pitoyo BJ , Bagaskoro AM 
Published: March 2021

AbstractThe increasing number of motorized vehicle users causes increasing air pollution in atmosphere. This condition is due to the exhaust gas content generated by the consumption of this fuel. To resolve this, one of the efforts is to use a mixture of bio-oil in diesel fuel. Bio-oil is a dark brown liquid composed of highly oxygenated compounds produced through pyrolysis, where its properties are close to heavy fuel oil. This study aims to determine the effect of cylinder head variations on the mixture of bio-oil and diesel fuel on the performance of an engine. The engine used in this research is a single-cylinder engine with a direct injection system. When the standard cylinder head variations are used, the best noise, specific fuel consumption, and gas opacity values are obtained. The best noise value is 92.1 dB with a composition of 15% bio-oil and 85% diesel fuel. Meanwhile, the best specific fuel consumption value is 0,236 gram/watt. second with a variation of 20% bio-oil and 80% diesel fuel mixture. The best opacity value is obtained at 30,3% when bio-oil fuel composition is 15% and diesel is 85%.
The Effect of Use Microwave Irradiation in Produce Biodiesel Nyamplung Oil (Calophyllum inophyllum Linn) Using KOH Catalyst
Authors: Nurhidayanti Nisa 
Published: March 2021

Abstract
Nyamplung (Calophyllum inophyllum Linn) is a non edible that has the potential to produce high yield biodiesel. Oil nyamplung in this study had amounted to 27,498% FFA content, therefore, needs a pretreatment process consisting of degumming to remove gum, esterification and neutralization to lower FFA <2% so that the oil can be resumed in the transesterification process. The purpose of this research to study the effect of microwave power, time and temperature of the reaction to yield biodiesel, identify methyl ester in the product and assess the kinetics of making biodiesel from oil nyamplung using microwave irradiation. Transesterification is done by using a variation of power (100, 200 and 400W), variations of time (5, 7, 10, 12 and 15 minutes) and variations of temperature (50, 55, 60, 65 and 70 °C). The results showed the best conditions using microwave power of 200 W at 65 ° C for 5 minutes, maximum yield of 84,62% biodiesel and biodiesel physical properties meet the standard of SNI 04-7182-2006. GCMS analysis showed that the methyl ester of biodiesel oil nyamplung is 30,23% methyl oleic, 25,76% methyl linolelaidate, 19.21% methyl palmitate, 15,75% methyl stearic, 2,11% methyl lignocerate, 1,41%, methyl eicosanoic, 0,54% methyl behenate and 0,37% methyl palmitoleic. Transesterification reaction rate constant of first order at a temperature of 55 °C, 65 °C and 70 °C is 0,395 min−1, 0,405 min−1 and 0,412 min−1. Pre exponential factor (A) amounted to 1,0161 L / mol min; the activation energy (Ea) 2579,834 J/mole and the rate of transesterification reaction (rt) = 1,0161e(2579,834/RT)[ME]. The results of this study showed that the rate of reaction using microwave irradiation higher and the reaction time becomes 1/6 times faster with activation energy value is smaller than with conventional methods.
Design of Constant Constant Current Regulator Control System of NBF 1200 Using Programmable Logic Controller at The Airport
Authors: Hartono  , Sudjoko R I , Hariyadi S , Kumalawati D A 
Published: March 2021

Abstract
International Civil Aviation Organization (ICAO) regulated Visual Aids for Navigation stated on Annex 14 Chapter 5 consist of mandatory item which provides important guidance’s for piloting the airplane. Presently, the system of visual aids for navigation has been working with the Constant Current Regulator (CCR) which in its development there are various type at CCR used at airport. One type CCR is still widely used at airport today is the CCR NBF 1200 power supply using its control system. Reliability and time respons become problem related those system. Therefore this paper presents an design on CCR NBF 1200 control system simulation to control the brightness level of the lamps which indicating as visual aid for navigation. The result shows brightness level success controlled by PLC remotely based on the power level.
A framework for sustainable environmental analysis
Authors: Mokhtar S’harin 
Published: March 2021

Abstract
This study aims to identify the determinants of key forces in the external and internal environment of event management to propose a sustainable environment analysis framework that will help organizers to improve the sustainability of the strategy formulation. The proposed framework incorporates sustainability practices, previous research on sustainable event management, existing strategies of sustainable strategic management, and the results from this study. This framework has adopted PEST Analysis (a framework used to analyse and monitor macro-environmental factors that may have a profound impact on an organization’s performance) in external environment analysis and Mckinsey 7s Framework in internal environment analysis to identify sustainable-related determinants of key forces to propose common sustainable practices to get common acceptance for sustainability. The identified determinants were applied in the proposed framework to guide event organizer when identifying key forces of external and internal environment which can influence to achieve sustainability in the event. On top of this, SWOT Analysis (a strategic planning technique used to help an organization to identify strengths, weaknesses, opportunities, and threat related to business competition) was adopted to help event organizers to identify the opportunities and threats in the external environment and understand the strengths and weakness of the organization to formulate effective sustainable strategies and move their events toward sustainability.
Resolving issues and disputes in Extension of Time (EoT) claim in the Malaysian construction industry
Authors: Yusuwan Norazian Mohamad , Adnan Hamimah , Ahmad Rashid Zul Zakiyuddin , Bakhari Nor Azmi 
Published: March 2021

Abstract
The rapid growth of population in urban areas resulted in a higher amount of waste generated yearly. According to the Solid Waste Management and Public Cleansing Corporation (SWCorp), in 2018, Malaysians generated 38, 142 tonnes of waste per day with an average of 0.83 kg/capita/day for a household in the urban area. Malaysia, with a population of 32.4 million, 76% of the entire population are living in urban areas (Department of Statistic, 2018), this figure is worrying. This pilot study explores and evaluates the perspectives of governance on waste management processes and practices for urban residents; in a mixed density housing scheme. A survey was conducted on 30 respondents of a mixed density housing scheme in Section 7, Shah Alam, Selangor. The data then analysed through reliability test analysis. There were four (4) key variables being put forward for this study; services and practices, socio-economic and well-being, stakeholders and environment. The result of the analysis has found out that, the variables for waste management services for mixed density housing scheme are reliable with the respondent’s feedback. However, some questions are not compatible to be analysed in parallel with other questions.
The Well-being of Urban Residents of Serviced Apartment in USJ, Subang Jaya, Selangor, Malaysia
Authors: Hoon Lgeh Oliver Lin , Abdul Jalil Akmal Fuad , Marzukhi Marlyana Azyyati , Kwong Qi Jie , Nasrudin Na’asah 
Published: March 2021

Abstract
Serviced apartment as a newly popular type of mixed-use residential area is providing a new lifestyle to people with commercial, recreational facilities, and public transport facilities within the walking distance. The change of living environment from traditional housing area such as terrace houses and apartments to high rise serviced apartment did affect the change of well-being level of people. A study had been carried out in Main Place Serviced Apartment in USJ, Subang Jaya with three components of well-being, i.e. psychological, physical and social well-being. The well-being level among residents was identified through a questionnaire survey. From the analysis, the study found that psychological aspect of well-being was increased after respondents were moved into the study area. However, not all the physical and social elements were increased the satisfaction/well-being levels. Serviced apartment with a mixture of land uses and facilities can be further refined especially on the aspects of parking, traffic condition, social life, and waste management/cleaning services.
Factors affecting consumers’ choice in purchasing local fresh fruits: case of Melaka Tengah
Authors: Muhamad Zahid-Muhamad , Ruslan Nur Aziera , Ibrahim Nordiana , Saili AR , Ismail Nur Amalina 
Published: March 2021

Abstract
This study is designed to make a comprehensive understanding of the attitude among consumers and explore the preferred place for Malaysian consumers to purchase fresh fruits. This study examined the purchasing pattern of local fruits consumers based on store attributes considered by the consumers in choosing the place for their fresh fruits purchase. A structured questionnaire was developed as a survey instrument which sought to gather information regarding the retail formats preference of the respondents. Four analytical techniques have been used to interpret the result which is descriptive analysis, cross tabulation analysis, mean analysis and Exploratory Factor Analysis (EFA). The outcome from this study revealed that consumer more preferred on traditional retail format rather than modern traditional retail format while purchasing the local fruits. Atmosphere of the retail market, competitive price, customer services and availability of various goods were identified as key determinants for consumer choosing the retail format. Based on this study, there was need for retail formats’ managers to consider what actually consumers need and wants and equilibrium between modern and traditional retailers must be met to fulfill what consumers demands.
Diesel Engine Run with Waste Cooking Oil (WCO) and Jatropha Biodiesel Blended Fuel
Authors: Saad Idris , Bahrim Fikri Arif 
Published: March 2021

Abstract
This project has been study the performance of diesel engine which runs with waste cooking oil (WCO) blends with jatropha biodiesel. The presence of jatropha biodiesel improved the fuel properties of WCO in blended fuel. Jatropha biodiesel was prepared through transesterification process from jatropha crude oil (JCO) by adding 20% amount of methanol and seven gram of potassium hydroxide per liter of JCO. The blended ratio of WCO started from 5%, 10%, 15%, 20%, 25% and 30% which were compared to jatropha biodiesel. The properties of blended WCO and jatropha biodiesel than WCO were improved in terms of kinematic viscosity (reduce between 3 to 13%), density (reduce between 6 to 8%) and calorific value (increase between 3.5 to 3.8%) as increases the volume of jatropha biodiesel in the fuel blends. The blended fuels were tested on YANMA L48N diesel engine at constant speed (1500 rpm) but different engine loads of 2 Nm, 3 Nm, 4 Nm, 5 Nm and 6 Nm. The performance of diesel engine with the blended fuel was compared to the petroleum diesel fuel in terms of brake specific fuel consumption (BSFC), Brake Thermal Efficiency (BTE) and exhaust emissions. The exhaust emission characteristics of blended fuels were significant to environmental benefit as the amount of CO2 emission was found reduced approximately between 11 to 33%. This project found that the optimum blending ratio is at low volume of WCO than jatropha biodiesel in the range of 5 to 10%.
Study on the Preparation and Application of Chitosan/Silica Cu(II) Imprinted Microspheres
Authors: Zhang Min , Tan Chengyu , Hou Jiaqi , Zhang Cheng , Xue Yongxiang 
Published: March 2021

Abstract
Molecularly imprinted polymers are functional polymers for selective recognition of imprinted molecules, which may have a wide range of applications in separation and purification, environmental monitoring, etc. Chitosan has excellent chelation for metal ions, being widely used in food, environmental protection, etc. In this paper, chitosan/silica Cu(II) imprinted microspheres were prepared by using natural product chitosan as functional monomer, silane-doped, Cu(II) as template ion and glutaraldehyde as crosslinking agent. The adsorption properties of the chitosan/silica Cu(II) imprinted microspheres for Cu( II) were studied by flame atomic absorption spectrometry. The experimental results showed that the adsorbability of Cu(II) on the chitosan/silica Cu(II) imprinted microspheres was better than that of chitosan/silica non imprinted microspheres. The results of orthogonal test showed that the order of influence on the adsorption capacity of the chitosan/silica Cu(II) imprinted microspheres was chitosan, glutaraldehyde, Cu(II) and silane. Under the optimum conditions, the adsorption capacity of the chitosan/silica Cu(II) imprinted microspheres for Cu(II) could reach 33.38mg/g. Scanning electron microscopy showed that the diameter of the chitosan/silica Cu(II) imprinted microspheres was lower than 3 urn. Chitosan/silica Cu(II) imprinted microspheres were obviously harder than chitosan Cu(II) imprinted microspheres.
Tempered Stable Ornstein–Uhlenbeck Model for River Discharge Time Series with Its Application to Dissolved Silicon Load Analysis
Authors: Yoshioka H , Yoshioka Y 
Published: March 2021

Abstract
We identify stochastic process models describing the time series of inflow and outflow discharges of Obara Dam in Hii River, Japan. These models are based on tempered stable Ornstein–Uhlenbeck (TSOU) processes that have not been utilized in hydrological analysis but can capture both large and small fluctuation of the time series data. In addition, the models can be exactly simulated in a statistical sense by utilizing a recent tailored discretization algorithm, serving as efficient stochastic tools. We show that the identified models accurately reproduce statistical moments of the time series data and probability density functions. Based on the mathematical framework of backward stochastic differential equation (BSDE), the identified model is applied to a unique dynamic stochastic analysis of dissolved silicon (DSi) load flowing into the reservoir associated with Obara Dam. We thus contribute to the first application of TSOU processes and a BSDE to hydrological analysis.
Influence of Tide and Runoff on Saltwater Intrusion in the Qiantang River Estuary, China
Authors: Jiao Jian-ge , Huang Sen-jun , Zheng Rong 
Published: March 2021

Abstract
Qiantang River Estuary, as one of main fresh water resources for urban zone, has been threatened by salt water intrusion. Due to the combined influence of tide and runoff, the mechanism of saltwater intrusion is extremely complex. In view of this, research on the variation characteristics of chlorinity along Qiantang River Estuary is conducted based on chlorinity data. Further, analysis on effects that tide and upstream runoff exerting on chlorinity at intake is carried out to ensure urban water security. The chlorinity and tide data was obtained synchronously from automatic real-time monitoring systems at Zhakou, Qibao, Cangqian, Yanguan and Ganpu stations with sampling interval of 5 minutes. Results show that chlorinity Yanguan and Ganpu are mainly influenced by tide with period of 12.4 h; chlorinity at other stations are affected by runoff obviously. The peak chlorinity values at all observed stations increase with increase of tide ranges. The increase of upstream runoff enables to reduce the peak chlorinity. It is feasible to extract water under average tide and average runoff.
Shrinkage, Density and Hardness of Hard Magnetic Material (BaFe12O19) Based on Iron Sand Produced by Conventional Solid-State Reaction Process
Authors: Widodo R D , Priyono  , Rusiyanto  , Anis S , Ilham R I , Firmansyah H N , Wahyuni N 
Published: March 2021

Abstract
This paper presents shrinkage, density and hardness number of hard magnetic (BaFe12O19) based on iron sand produced by conventional solid-state reaction process. Iron sand was mechanically filtered using permanent magnets 35 times. The filtered iron sand was heated at temperatures of 900°C for 5 hours in the furnace and after it was cold and produce Fe2 O3 phase. Powders of Fe2O3 and BaCO3 were mixed and milled in a shaker ball mill up to 3 hours. The powder mixture compacted at a pressure of 2.5, 5 and 7.5 tons and followed by sintering at temparature of 1100, 1150 and 1200°C for 1 hour in the furnace. Shrinkage measurements include diameter and height uses vernier caliper, while density measurements use the Archimedes method. Hardness number obtained with pass vickers hardness testing methods. Barium ferrite ‘s maximum shrinkage and bulk density values were at 7.5 tons compacting pressure and 1200°C sintering temperature where the shrinkage value was 7.44 percent, average shrinkage was 3.49 percent, and density was 4.397 g/cm3. In barium ferrite with a compacting pressure of 7.5 tons and a sintering temperature of 1200 °C which is equivalent to 741 HV the highest hardness value is found. The higher the compacting press and sintering temperature, the greater the importance of bulk density and hardness of the materials.
Investigation on the effect of different friction stir machining tools shape on the mechanical properties of magnesium alloy work piece
Authors: Abdul Wahab N , Fatchurrohman N , Zulkfli Z 
Published: March 2021

AbstractFriction stir process (FSP) is a method of solid-state consolidation that uses an inexhaustible tool to increase the modification of work piece structural. This current work presents a study of friction stir process on magnesium (Mg) alloy work piece using different design of pin profiles tool. Experiments were conducted in dry condition where tool progression was monitored carefully in every milling passes, then the effect and quality criterion were measured. Result shows that the dominant tool of friction stir process mechanism of mild steel tool is the strength intensity increased at higher speed and lower plunge length due to the superiority of friction stirred region on the magnesium. Furthermore, the hardness of the stirred friction of Mg alloy also increased by using a triangle pin profile design.