bluuebunny/crossref_metadata_2025_split huggingface dataset:
Process development for the enrichment of curcuminoids in the extract of ionic type of NADES
Authors: Rachmaniah O , Muhsin M R , Widya A P , Rachimoellah M 
Published: January 2020

Abstract
Curcuminoids were successfully extracted from Curcuma zeodaria powder with Natural Deep Eutectic Solvents (NADES) as solvent. Ionic types of NADES such choline chloride-citric acid-water (CCCA-H2O = 1:1:18, mole ratio) and choline chloride-malic acid-water (CCMA-H2O = 1:1:18, mole ratio) gave the highest yield of extracted curcuminoids, ca. 0.270±0.025 and 0.355±0.055 mg/g respectively for CCCA and CCMA. However, the final product of the extracted curcuminoids was mixed in the NADES matrix. Hence, a separation process by means a solidification was mandatory. Isopropanol-n-hexane in both volume and molar ratio, i.e. 1:1, 1:1.5, 1:2, 2:1, and 2.5:1, were observed as a solvent in the solidification process as well as the solubility of curcuminoids in both isopropanol and n-hexane. Unfortunately, both of CCCA-H2O (1:1:18) or CCMA-H2O (1:1:18) and curcuminoids form a homogenous mixture with isopropanol. Therefore, all NADES constituents, i.e. choline chloride, citric acid/malic acid, and water, should be first removed before solidification process. Solubility of curcuminoids in isopropanol and n-hexane was, respectively, 3.2 mg/mL and 0.4 mg/mL at 40 °C. Isopropanol-hexane (1:1.5, v/v) give the highest recovery of curcuminoids, ca. 74.29%, by solidification process.
Recovery bitumen from asbuton with sodium tripolyphospate and SDBS surfactant as wetting agent
Authors: Irfin Z , Susianto S , Suprapto S , Altway A , Hardjono H , Nurmahdi H 
Published: January 2020

Abstract
The objective of this research is to develop a more-environmental friendly method of bitumen extraction from Asbuton, which also has high rate of percentage recovery, by using a mixture of sodium tripolyphosphate (Na5P3O10/NTP) and sodium dodecyl benzene sulfonate (SDBS) surfactant in several temperatures process. The extraction process itself has three steps of reactions, first is premixing, second is digesting and third is separating. Separated layer of bitumen after separation process will be analyzed to obtain bitumen percentage recovery during extraction. The purpose of premixing step is reducing viscosity of Asbuton by adding DEX up to 60 percent (w/w) of the total mass and then mixing it for 30 minutes. The digesting step is carried out by adding a mixture of DEX Asbuton with wetting agent. Wetting agent is a mixture solution of sodium dodecyl benzene sulfonate surfactant (SDBS) and Na5P3O10 (NTP) in various concentration. This mixture is being stirred at 1500 rpm using controlled temperature at 60, 70, 80 0C for 30 minutes. We use various surfactant ratio of SDBS from 0.125%; 0.25%; 0.37%, 0.5% (w/w) to the total mass ratio, and for NTP ratio is 0.125%; 0.25%; 0.37%; 0.5% (w/w). Separation process is done by adding water to form three layers of solution, the top layer, DEX-bitumen solution, will be weighed and measured for its weight and density to obtain the percentage recovery of bitumen. It can be concluded that the combination of SDBS and NTP mixture as wetting agent, can bring better result on bitumen extraction from Asbuton asphalt. The highest percentage of bitumen recovery is 74.63% at 80°C of temperature, and with SDBS concentration of 0.125% and Na5P3O10 concentration of 0.25%.
A new form of steel base isolation system for seismic high-rise building
Authors: Rochman T , Rasidi N , Sumardi S , Purnomo F 
Published: January 2020

Abstract
The higher story of a building then it will be more vulnerable to its earthquake or seismic responses. The use of seismic devices will reduce earthquake force. In this study, the steel base isolation material has been proposed. This paper aims to design a new steel base isolation system that have good resistance in both of seismic vibration and axial pull out. The building data are 3D mini three-story, six-story, nine-story steel frame structures. The shaking table is used to test with two types of vibration, medium and maximum. FEM analysis was implemented to find the seismic responses. From the calculation results, a reduced response was obtained in conditions of moderate damage to a three-story frame with an average acceleration of 88% reduction, a maximum acceleration of 22% reduction and a six-story frame in heavy damage with an average acceleration of 73%, the maximum acceleration is reduced into 43%.
Optimizing agricultural land area to increase productivity for anticipating decreasing irrigation water supply
Authors: Azis S 
Published: January 2020

Abstract
In order to maintain food security in Indonesia it is very necessary to organize the provision of irrigation water as well as possible. Current surface water discharge conditions have decreased compared to 10 years ago so that there really must be efficiency and wise efforts in the provision of irrigation water in paddy fields. Many efforts to increase the productivity of paddy fields and one of them is by optimizing the area of paddy fields and regulating cropping patterns in the paddy fields. In the initial stage of this study an analysis of the availability of surface water discharge was then analyzed for irrigation water requirements that could be given to each paddy field in accordance with a predetermined cropping pattern. Then a land area simulation is carried out to obtain the most optimal land area. This simulation is carried out in the conditions of the wet season, the normal season and the dry season. Simulations are carried out with various cropping patterns including rice, secondary crops and sugar cane. Simulation results show that the most optimal land area is in the wet season, then the normal season and the dry season.
Performance of Ashpalt Concrete Wearing Course on the effect of duration of water immersion
Authors: Purwono G A , Sulaiman S , Nursyafril N 
Published: January 2020

Abstract
Asphalt concrete as a wear layer, known as the Asphalt Concrete-Wearing Course (AC-WC) with a minimum nominal thickness of 4.0 cm. However, the use of AC-WC layers in the pavement structure is often faced with problems of performance degradation due to the development of various types of damage during the service life one of them is a result of the effect of water. In general, water has a negative effect on road pavement construction. Standing water can be caused by high rainfall, poor drainage systems, high groundwater levels, and water runoff. This research aims to look at the performance of the physical and mechanical properties of testing Marshall characteristics on a mixture of asphalt pen 60/70 wear layer (AC-WC) on the duration of water immersion from three different types of water. The specimen was carried out immersion testing from three types of water, namely clean water, brown flood water and black air with 30 minute immersion standards with variations of 1 day, 7 days, 14 days, 21 days and 30 days. The study outcomes shows several conclusions: (1) From the Marshall test results the physical properties obtained showed that the longer the immersion time the greater the VIM value obtained, the increase occurred in the type of brown flood water with the lowest Ph. Whereas the value of VFB in brown flood water immersion decreased the most as the duration of the immersion; (2) The mechanical properties of the Marshall test results are stability values still meet the standards, while for the value of melt and MQ black flood water immersion is the most influential on the asphalt mixture.
The effect of using crumb rubber on fatigue and rutting lives in flexible pavement
Authors: Balqis T A , Suherman S 
Published: January 2020

Abstract
This research is performed to analyze effect of using crumb rubber (CR) on the overlay design of Palembang City – Betung roads. Analysis of existing road conditions using the AASHTO 1993. This analysis based on deflection data using the Falling Weight Deflectometer (FWD). While, the overlay design analysis using CIRCLY 7.0 software to determine horizontal tensile strain (εh) for fatigue live and vertical compressive strain (εv) for rutting live parameters. The result showed that using CR can increase fatigue live into 66 % and rutting lives into 22 % for contribute pavement performance. To ensure the effect of CR in pavement’s performance, further research must be taken to find out if there are other effects that support.
The performance of composite steel in the elements of a post-fire steel bridge
Authors: Utami A , Gunadi R 
Published: January 2020

Abstract
The steel structure is commonly acknowledged able to return to its original strength condition. It is yet unknown whether composite structure may return to its initial condition. Test specimen on the present study consists of 8 units, each of them divided into four stud-connector bold (SP) composites beams and four UNP connector (SF) composite beams. Each of the specimen has control value by SP/020 and SF/020, and other six specimens with combustion of SP/400, SP/550, SP/700 and SF/400, SF/500, SF/700, within condition of point load for about 12 kN. The study intends to investigate composite girder of post-fire bridge element towards duration and heat temperature factors and effect of beam performance towards stud-connector and UNP connector composites. The results draw several conclusions; The process of composite combustion shows that the failure on composite steel beam specimen is due to the load, burning duration and temperature which results in residual deflection. Deflection test reveals the effect of temperature, load, and duration do not give significant impact to load capacity of post-combustion beam structure.
Design load controller and load shedding mechanism at DC house prototype
Authors: Hidayat M N , Hermawan S L , Ronilaya F 
Published: January 2020

Abstract
The DC house project is a pure DC electricity system to enable optimal use of renewable and alternative energy, DC House promotes a more sustainable solution by not using fossil-based fuels. DC sources are mainly from renewable generation, such as PV and wind turbines, the output from PV and Wind turbine produced is not stable, so there is a need for a regulatory system, arrangements can be made on the generation side and on the load side. Because the output of the generator is not constant, a setting on the load side is needed to adjust the generation capacity. If one of the offsets is to be released, a load shedding must be carried out to meet the load requirements. The release of the load is carried out when the supply is reduced because one of the generators is off, then the lower priority load will be released automatically. In this study simulated DC loads using PID control on the buck converter and load release using switching four loads with priority scale. The DC current sensor is used to determine the amount of current when determining the load released due to limited supply from the source.
Design and analysis of a portable spiral vortex hydro turbine for a Pico Hydro Power Plant
Authors: Hidayat M N , Ronilaya F , Eryk I H , Joelianto G 
Published: January 2020

Abstract
Pico Hydro Power Plant (PHPP) is a hydroelectric power plant with a scale below 5 kW. This technology is suitable to be applied to areas that have many rivers with sloping slopes. The PHPP applied in this research utilized the river flow and then flowing the water through a water channel with a slope angle around 10 degrees. Due to this sloping angle, it is necessary to modify the turbine intake to produce a more rapid water flow so that the turbine can rotate faster. The modification is made by designing and making a spiral vortex hydro turbine, where the intake is designed to resemble a snail house or a whistle to produce a spiral vortex to drive a turbine. The results show that the spiral vortex hydro turbine can produce faster turbine rotation, compared with a conventional water intake. The speed of the portable spiral vortex hydro turbine in this research can reach 90 rpm. Then, the turbine is coupled with a generator to produce electricity, through a pulley system. The faster the turbine rotation, the higher the generator output voltage. The highest output voltage of the generator is 27.5 Vdc at the speed of 293 rpm. In addition, the device is easy to move and maintain due to its portable design with a weight of 22 kg.
Design of Energy Database Management System (EDBMS) on the unit 2 outgoing transformer at the State Polytechnic of Malang
Authors: Syamsiana I N , Setiawan A , Saputra M 
Published: January 2020

Abstract
Recently, the efficiency of electrical energy is one of big challenges in the world. The needed energy is very huge; meanwhile the sources of energy are limited. Many researchers have been trying to find solutions for increasing the energy efficiency. One of ways is to monitor the use of the energy easily so we can reduce the energy usage. This paper proposes a system for monitoring energy usage by using Internet of Thing. Such system is called as Energy Internet of Things (IoT) based Database Management System (EDBMS). All buildings are supplied by Unit 2 Outgoing Transformer in the State Polytechnic of Malang which collects data of the used energy by using smart energy meter. It uses router LAN in UPT PP for sending the data from all buildings to the cloud, and displaying the received data on a web page. The collected data will be used for the analysis of power quality. Based on the result of the harmonic monitoring that shown the value are still in the standard range because the limitation of allowable THD current is 15%. And based on IEEE STD 446-1995, the standard for three-phase load imbalance is as much as 5-20% maximum for each phase. Meaning, Unit 2 Outgoing Transformer is out of standard or it does not comply with the standard.
Dynamic VAWT Darrieus by changing angle of attack to reach maximum efficiency
Authors: Setiawan B , Habibi I I A , Parastiwi A , Damayanti A M , Wakidah R N 
Published: January 2020

Abstract
Vertical Axis Wind Turbine is one of the most widely developed Renewable Energy. Many experiments and research are conducted to obtain maximum power efficiency. To get the maximum energy conversion efficiency required TSR (Tip Speed Ratio) is constant. To have the efficiency controller to change the Angle of Attack is required to maintain maximum efficiency at any wind speed. The method is applying controlled blades (aileron), the blades represent the value of Angle of Attack. In accordance with the changing of wind speed. In the VAWT Darrieus TSR reference value of 6, this value becomes the reference to obtain maximum efficiency against changes of wind speed. PID method is used to control the blades to form an Angle of Attack corresponding to the dynamic changes in wind speed. So that the VAWT speed is used as feedback into control. The shape of the blade affects the efficiency of the resulting spin, therefore the most efficient blade of the blades is the thin airfoil family in order to obtain the maximum flow of wind to rotate the generator. From the simulation done by using VAWT, it can be shown that the power efficiency obtained up to 28% in any wind speed.
Implementation of Programmable Logic Controller in multi machine operations with product sorting and packaging based on colour detection
Authors: Fathahillah F , Siswanto M , Fauziyah M , Parlindungan R , Putri R I , Roh Y-G 
Published: January 2020

Abstract
Automation is widely used in various industries to increase the speed, accuracy and effectiveness of production and reduce the risk of hazards. In general, the manufacturing industry has a product packaging and sorting process based on size, weight, shape, height and color. Currently, the sorting process in the industry is still mostly done manually which causes human error problems, so the development of industrial automation that is low cost, easy to maintain, efficient, user friendly and more accurate needs to be done. Programmable Logic Controller (PLC) is one of the most widely used for automation equipment in the industry and can be programmed to control machine operations. In this paper, the Mitsubishi Melsec PLC with ladder diagram programming using GX work2 has been developed to control multi-machine operation by product sorting and packaging based on product color. Multi-machine operation consists of three DC motors used for conveyors, two single solenoids, proximity sensors, inductive sensors and limit switches. The proximity sensors are used to detect the products based on color. The system is equipped with an emergency button and alarm system to facilitate the implementation of troubleshooting. To facilitate communication with operators and user-friendly systems, the human machine interface (HMI) is used as an interface for system monitoring and controlling. HMI uses Pro-face from Schneider which is programmed using GP-Pro EX4.0. The ladder diagram has been implemented in the PLC and tested on hardware to simulate the system. Based on test results, MELSEC PLC can communicate with HMI and control multi-operation machines with product sorting and packaging. The machine can separate and package metal products by colour and the packaging system can be monitored and controlled remotely automatically with HMI.
Application development of website content filling in the Information Technology Department of State Polytechnic of Malang
Authors: Puspitasari D , Pramudhita A N , Rosiani U D , Rahmawati T K 
Published: January 2020

Abstract
The website is a communication tool that is used as an intermediary to share the latest news. The website of the Information Technology Department - Malang State Polytechnic (JTI-Polinema) is also a means of communication to share the latest activities and information about JTI. From January 2018 to November 2018, the news uploaded is only six content. This is not proportional to the number of activities available at the JTI. This is because there is only one type of user, the admin who can fill the website content. And the admin does not always know the activities in the information technology department. This study aims to develop an application to fill the website content of the Information Technology Department in state polytechnic Malang’s website by adding one more type of user, namely students and also make the interface look better and easy to use. This application allows students to upload articles about departmental activities, competitions, workshops and other information they know. This application development uses Kanban which is one of the lean software development methods (lean method). Based on validation testing this application is able to meet all the main functional requirements. while the usability test results based on usefulness, ease of use, ease to learn and satisfaction shows a high average value of 86.95%, it can be concluded that this application is acceptable and easy to use.
Automatically collect alumni data on social media
Authors: Ariyanto R , Rachmad C , Syulistyo A R 
Published: January 2020

Abstract
Tracer studies are useful for universities, institutes, and academies, as well as scholarship providers such as government, companies, and institution. Tracer studies are used to track alumni which can be used to measure the relevance of objectives, educational processes and curriculum in accordance with current alumni conditions. However, the tracer study has several obstacles in the distribution process to reach out and make alumni willing to spare their time for filling the tracer studies. This study aims to overcome this problem by gathering the information needed from social media such as workplaces and professions. The results of this study is alumni data which scrap from social media.
Analysis of energy generator prototype microhydro, based levers, high water lift (1.5 meters) without flow
Authors: Suyanta S , Adiwidodo S , Hartono M 
Published: January 2020

Abstract
Renewable energy sources, a future energy source should have developed in response to the problem of scarcity of fossil energy which will eventually run out. The study of science and technology as a solution, by utilizing the potential of all natural resources around us. Liquid substances, especially water, have properties that are always flat surface, can be used if you have a height difference, which is often called a potential difference, can be formed into a potential style by applying existing knowledge and technology. As applied by several researchers: Microhydro should require a minimum of falling water, dam, requires high costs and water source plant governance is maintained. Minimum wind speed, wind speed should fulfill. Solar power plants, constrains weather. All of that still utilizes the natural potential that can be influenced by climate, environmental damage, because it occurs due to natural processes. By utilizing artificial potential differences, we can utilize liquid fluid properties to be used as renewable energy sources. Through the construction of mechanical levers that can move energy can be generated. That since ancient times this simple plane has been applied a lot, but it is still on a balance (static) level. Based on this concept it can be developed that the support reaction has multiples of the weight and leverage force. Through this rule we develop it into a lever-based energy. A mechanic, which is can produce a reaction force and can move at a certain speed to produce energy. Therefore, it produces multiples of the reaction force from the water potential force due to its own weight.
Design and implementation of analog telephone on IPPBX network interconnection
Authors: Atmadja M D , Soelistianto F A , Aisah A , Ratnawati Y 
Published: January 2020

Abstract
The use of PABX between buildings existed in State Polytechnic of Malang consists of 3 types, which are produced by the same manufacturer. However, the three types of PABX have different characteristics and specifications from one another. Therefore, its merging is done by numbering method which must use prefix to be able to contact users in other PABX. Every PABX is always provided with an interface that aims to combine with different systems, so that adjustments can be made. To overcome this problem, by software-based central installation, namely IPPBX, so that if the change (migration process) occurs, a device called the internet telephone gateway can be installed. This device with one IP address can connect more than one analogue telephone number. So far the product has 32 ports. This research uses ITG with 16 ports due to the connection characteristics of the same connector as the conventional PABX. This condition will be easily implemented and does not change the existing network system in State Polytechnic of Malang. The results of the design based on the number of connected services required a number of 32 devices ITG 16 ports plus 4 ports connection to the public services telephone network (PSTN).