bluuebunny/crossref_metadata_2025_split huggingface dataset:
Decreased of calcium oxalate levels in the purple taro flour (Colocasia esculenta) from Aceh Province, Indonesia using three immersion methods
Authors: Rozali Z F , Zulmalisa Z , Sulaiman I , Lubis Y M , Noviasari S , Eriani K , Asrizal C W 
Published: March 2021

Abstract
Cocoyam (Araceae family) tuber, like purple taro, traditionally are used as sources of non-rice carbohydrates in Aceh Province, Indonesia. But it contain high calcium oxalate, which contributes to kidney stones formation. Immersion in strong acid (HCl) solution can reduce calcium oxalate. However, it will cause a very strong taste and aroma in cocoyam flour. So, it is necessary to use other immersion methods. This research aimed to examine the effect of the immersion method to reduce calcium oxalate in purple taro flour. The immersion methods used in this research are weak acids (CH3COOH), salt (NaCl), and alkaline salt (NaHCO3). Calcium oxalate, moisture, and ash content were the parameters observed in this study. The result showed that all immersion methods can reduce calcium oxalate levels in purple taro flour. The lowest oxalate content (42.64 mg/100 g) was obtained by the NaHCO3 immersion method. The NaHCO3 had a significant effect to decrease calcium oxalate content in purple flour
Potential of betacyanin as inhibitor of SARS-CoV-2 revealed by molecular docking study
Authors: Tallei T E , Tumilaar S G , Lombogia L T , Adam A A , Sakib S A , Emran T B , Idroes R 
Published: March 2021

Abstract
Covid-19 is a global pandemic where an effective drug has yet to be found. A new coronavirus species, SARS-CoV-2 causes this disease. Several studies have been conducted on medicinal plant-based lead compounds to find antidotes for this virus. One of the fruits that with a high betacyanin content is super red dragon fruit produced by plant Hylocereus costaricensis. Betacyanin, besides having anti-inflammatory and immunomodulatory activities, also has antiviral activity. Therefore, this study aimed to evaluate betacyanin’s interaction with several SARS-CoV-2 receptors by observing its binding affinity and compared it with the nelfinavir and hydroxychloroquine sulfate that have been recommended for treating COVID-19. This research was an in silico study using computer software to assess binding affinity simulations based on molecular docking. The results of this study indicated that betacyanin had a good affinity with several receptors so that it has the potential to be developed as a lead compound to overcome COVID-19. Based on its binding affinity value, betacyanin’s ability was comparable to nelfinavir and hydroxychloroquine sulfate recommended by WHO as a therapeutic agent for COVID-19.
Assessment of water quality index of Puah Reservoir, Hulu Terengganu, Malaysia
Authors: Abubakar M K , Ruddin M S A S , Filza E A , Ahmad Nazri S , Shahril M S 
Published: March 2021

Abstract
Puah dam is located 50 km from Bandar Gua Musang – Hulu Terengganu roadway, and about 65km west of Kuala Terengganu. Puah Reservoir is used for macro-hydro power plant (capacity 250MW). The purpose of this study was to determine the water quality status of the reservoir. Based on water quality index grading, the reservoir water has been classified as poor according to WHO WQI rating with a calculated range of 11.52 – 485.71. Although, the result for the mean WQI for all the stations/locations (48.04 – 154.36) revealed that the water is fit for drinking purpose through any form of treatment. However, it’s relatively good for swimming, bathing, laundry, irrigation and industrial purposes. This condition showed that the activities of Tambat and Puah hydro-power generation had no negative effect on the water quality of upper and lower parts of Puah Reservoir respectively.
Deformation and dynamic stability of asphalt concrete by using granite dust as filler
Authors: Oesman M , Sundara A , Endawati J , Virnawan D 
Published: March 2021

Abstract
Asphalt Concrete – Wearing Course (AC-WC) is a surface layer of flexible pavement which have direct contact with vehicle wheel. One of the surface layer damage categories is the wheel track (rutting). In this research, the experiment was done by using industrial waste of granite stone production in the form of dust as filler in the AC-WC mixture. The variation of filler content used are 3%, 4.5%, 6%, 7.5% and 9% with cement filler as comparator. The test was conducted by using wheel tracking machine on temperature of 60˚C, 45˚C and 30˚C. The test result shows that the optimum filler content using granite dust in the AC-WC mixture is 3%. Meanwhile the optimum filler content on the asphalt concrete using cement filler is 7.5%. Thus, it shows that the higher temperature cause the ability of maintaining the wheel track decreased. Furthermore, if looking at the relation between dynamical stability, deformation depth and deformation velocity on filler concentration is not linear.
Innovative products of concrete steel bone testing tools in the field of civil engineering building
Authors: Hadi T , Pamungkas N S , Wahjoedi W , Mulyono T 
Published: March 2021

Abstract
Bending test is one type of material testing conducted to determine the mechanical properties of a technical material. In designing this bending test required a standard design method that uses standard machine elements as well as commonly found in the market. In practice in the field, there are only a few materials testing practitioners who pay attention to aspects and effects of variations in the dimensions of the test specimen on the data from the test results. The test is carried out with the intention to obtain information about fulfilling the quality requirements and the feasibility of the material to be used as construction material for buildings, bridges and other physical buildings. As for one application that can be done is to look at aspects of the problems that are around that are associated with practicum activities in the laboratory and in the work industry. Therefore it is necessary to adjust between making the final report with the needs needed in the industrial world. For this reason, the bending test is made to study the effect of dimensional variations on test specimens in arcing testing. For this reason, this study with the title “Innovative Products for Concrete Reinforcement Steel Curved Test Equipment in the Field of Building Materials in the Department of Civil Engineering” is very important to do. The research was conducted to improve the performance of tools in the building materials laboratory. The final results of the study are expected to function optimally and easily used for laboratory work.
Monitoring rainfall intensity and moisture water content using soil column experiment
Authors: Mukhlisin M , Yunanto B , Suharjono A , Martono M , Apriantoro R , Kusumawardani R 
Published: March 2021

AbstractIndonesia is a tropical country that has two seasons, rainy season and dry season. The wetting and drying of soil due to changing of the seasons caused change on soil properties such as moisture soil water content, effective soil porosity, soil suction etc. During rainy season, rainfall infiltration caused increasing of moisture soil water content in a soil slope, tends to reduce soil shear strength and followed by slope instability. In this soil column experiment was set up with rain gauge station and YL-69 sensor and capacitive soil moisture sensor to monitor rainfall infiltration and soil moisture water content in red clay soil. A wireless sensor network with low power wide area network technology integrated with the cloud to observe rainfall intensity and soil water content in soil column with realtime monitoring. The focused on improving the accuracy of rainfall intensity and soil water content sensors readings using regression methods. The experiment results showed that rainfall intensity was observed accurately while for the YL-69 sensor, the error reading was 5.15% and the error reading capacitive soil moisture sensor was 2.99%.
Emission comparison of short lived climate forcers over long term greenhouse gases from domestic and transport sector in Semarang city
Authors: Huboyo H , Samadiku B , Manullang O 
Published: March 2021

Abstract
Short-lived climate forcers (SLCF) controls are important because of their shorter impact and more immediate benefits in the short term than carbon dioxide controls that have a 100-year time horizon. In this study, we estimated the emission of SLCF from domestic and transport sector in Semarang city using emission factor from IPCC and CORINAIR. We also predicted the emission dispersion using AEMOD View. The total consumption of LPG domestic sector in Semarang city is 48,532 tons in 2017 and produces total SCLF emissions 0.537 tons/year and 11,538 tons/year for BC and CH4 respectively. This corresponds to CO2 emissions of 145,611 tons/year and 230.76 tons/year of N2O emissions. While from transport sector, the motorcycle has the largest VKT i.e 18.282.061.600 km/year in 2017. The emission, based on VKT data combined with active vehicles data, reach 178.23 tons/year, 802.52 tons/year for BC and CH4 respectively. Transport sector produces total CO2 emissions almost 15 times to that of domestic sector. Based on emission model, the emission distribution was concentrated in the districts located in the city center. The pollutant was accumulated in the Northwest, city center and Southeast of the city.
Electronic system of rubber belt electro-mechanical continuously variable transmission for motorcycle applications
Authors: Supriyo B , Ariyono S , Sihono S 
Published: March 2021

AbstractThis paper deals with the design of electronic system for changing the transmission ratio of a rubber belt electro-mechanical continuously variable transmission (CVT) for motorcycle applications. In this CVT, the rubber belt is used as a medium to transfer both the speed and torque from the input pulley to the output pulley based on contact friction force existed between the belt and both pulley surfaces. Each pulley set consists of one fixed and one sliding pulley sheaves. The axial position of the input sliding pulley sheave is detected using a two channel incremental rotary encoder and controlled by an electro-mechanical shifter system utilizing DC motor, actuator gear set and cam mechanism. The sliding sheave of the output pulley is axially pushed by contra spring to provide sufficient belt compression for preventing belt slip. The CVT ratio is changed by varying the input and output belt-pulley contact radii. It can be done by controlling the axial position of sliding input pulley sheave, the angular speeds of input and output pulleys are sensed using one channel incremental rotary encoders. By knowing these two speed values, the CVT ratio can be computed. The microcontroller system of Arduino is programmed to detect and control the axial position of the input sliding pulley sheave to regulate the CVT ratio. The experimental results show that the electronic system can perform the CVT ratio changes adequately.
Prediction effective capacity battery of cellular BTS for an effective maintenance
Authors: Harijadi M B , Andromeda T , Somantri M 
Published: March 2021

Abstract
A cellular base transceiver station (BTS) systems must be operated continuously in transmitting signals to the mobile stations. Reliability operation must be performed by this BTS to serve users without any interruptions. In several cases the BTS are found failed due to several disturbances that occurred during operation. One of the disturbances is caused by electrical energy supply interruptions. Although the cellular BTS power supply system is usually equipped by battery as a secondary power supply, the reliability can be influenced by the health of the battery. The health of battery is inclined by instability of main electricity supply, temperature fluctuation of the battery environment, increment of battery aging, the number of charging and discharging cycles (CDC), and the number depth of discharging conditions (DOD) that occurred. The impact of these factors will affect to the strength of battery. This paper proposes an investigation method to the battery health to ensure the performance of BTS. The method is applied by considering the charging and discharging characteristics of the battery. Since the characteristic signals are not linear, the calculation is performed using fuzzy method. Early results show that this prediction method can be applied to support maintenance work. The proposed method gives an overview of the battery health that can be followed up by technician to ensure the reliability of the BTS.
Web-based rule-based system for early detection of anemia among pregnant mothers
Authors: Veronica S Y , Widyawati M N , Suryono S 
Published: March 2021

Abstract
Anemia among pregnant mothers is a serious issue that may cause pregnancy complications, premature birth that can lead to mortality, and low birth weight (BBLR). Monitoring for anemia among pregnant mothers is quite a phenomenon for midwives and health professionals due to time constraint as it takes time to establish a proper diagnosis. Late diagnosis establishment results in late treatment. Therefore, this paper proposes a web-based rule-based information system using the rule-based algorithm to ease monitoring and detection of anemia among high risk pregnant mothers. The method employed is online rule-based information system to diagnose anemia among pregnant mothers. Respondents input data of symptoms that will then be processed by the information system to generate diagnoses. Resulting diagnoses are displayed as they are. The rule-based method in the information system validates data of symptoms and diagnoses with experts in the field to serve as reference in providing health care information. This is a pre-experimental research with one posttest group. The intervention group (N=10) was given treatment using the information system, while the control group (N=10) was given treatment manually. Interventions were conducted for 20 days, and measurements were carried out on the 21st day using the Technology Acceptance Model (TAM). The anemia detection system for pregnant mothers developed here is proven to be effective in helping anemia detection and has been validated by experts (midwives) and hence, been declared valid. With effectiveness score of 90 %, this web-based rule-based information system is effective in detecting, monitoring, and reporting anemia among pregnant mothers.
Study method accordance for presstool design learning between POLINES and PT Mekar Armada Jaya in the framework of link & match
Authors: Wattimena R M , Ardjo A S , Hartono H , Alfauzi A S 
Published: March 2021

Abstract
PT Mekar Armada Jaya, located in Cibitung, Bekasi, West Java, is a national-scale industry engaged in manufacturing various vehicle parts, especially those made of steel sheets. The process of making various parts of this vehicle requires a press tool. This company designs, makes, studies, and develops all the required press tools, therefore human resources (HR) are needed who have the competency to design and make presstools. Based on this, PT Mekar Armada Jaya held a partnership to produce the intended HR needs, namely graduates of the D3 Mechanical Engineering study program who were ready to work both at this company and at other similar companies. Along with the link between the Semarang State Polytechnic and PT Mekar Armada Jaya above, it is necessary to study the alignment of methods and learning strategies for the presstool design. The results of this study are in the form of design learning methods that will be carried out in the D3 Mechanical Engineering study program and learning handouts for the topic of presstool design.
Analysis of vibration due to misalignment in the clutch cluster installation of centrifugal pump
Authors: Widodo I G , Khoryanton A , Pramono A 
Published: March 2021

Abstract
Knowledge of vibration and the resulting data is very important for maintenance and troubleshooting where this ability can help companies reduce the occurrence of downtime and can increase profits both in terms of production and from a longer machine life. One of the causes of high vibrations is a misalignment in a centrifugal pump installation that is driven by an electric motor and connected by a fixed clutch. The method used is to do differences in height in the horizontal, vertical and angular directions by providing variations in the rotation of the electric motor and pump, then checking at four bearing positions on the electric motor and pump. The results showed an increase in vibration at each addition of the sim on the electric motor fastener bolts, the greatest vibration occurred in the MOV (indoor motor axiall) with the addition of a 1.5mm sim of 3.01 mm / sec an average increase of 29% and at the largest pump vibration in POA (outdoor axial pump) with the addition of a 1.5mm sim of 9.88mm / sec, increased by an average of 58%.
Model for identification of rice type using combination of shape and color features
Authors: Jumi J , Zaenuddin A , Mulyono T 
Published: March 2021

Abstract
Rice is an agricultural commodity that is a staple food in Indonesia with hundreds of types of rice that have different characteristics. The type of rice can be distinguished from color and shape. The main feature that is dominant and can distinguish each type of rice is the color and shape. This feature is the main key in identifying types of rice. Identification is done by comparing the similarity of rice images using the value of color and shape features. The similarity can be determined through the difference in feature values between the query image and the database image. The closer the difference is to zero, the higher the level of similarity. The degree of similarity will affect the accuracy of image recognition at the time of identification. In this study, an analysis of the accuracy of image identification and measurement of computation time was carried out. Improved identification accuracy using the weighting of color and shape feature values. Extraction of the two value features using the invariant moment and color moment. Preprocessing before extraction using Grayscale, resize, edge Enhancement, Histogram Equalization. Clustering of rice image data using K-Means clustering. The results showed that the accuracy of identification with 400 rice image test data, reached more than 95% in the weighting scheme Ws (weighted Shape) = 40% and Wc (weighted color) = 60% with an average computing time of 5 milliseconds at 10 the cluster.
Design models of automatic humidity control system in flash off painting line room to reduce defect products at PT. Kubota Indonesia
Authors: Khoryanton A , Giyanto G , Satito A , Harmanto S , Haryanto H , Tegar T 
Published: March 2021

Abstract
The main challenge often faced by PT. Kubota Indonesia in connection with the quality of production is still a lot of level of disability in the production process, especially in the painting process. The process of painting is highly required according to the standard of both the process and condition of the room so that the results of the painting do not occur defects. Based on production data in the period from October 2018 to January 2019 there were 80% defective products with blistering defects of the total defective products, this needs a deeper analysis of the causes of product defects. Blistering defects in the form of bubbles on the surface of the painting result occur because the standard of air humidity is not achieved when the flash off process is caused because there is no tool to condition the air in the flash off the chamber. The purpose of this research is to design an automatic humidity control system model that can be used as an alternative to PT. Kubota Indonesia as a method for reducing humidity so that it can reduce the potential causes of blistering defects. Research methods include problem identification, literature study, design, and manufacture of models and testing. Problem identification is done by using the 5M + 1E method to find the root of the problem. The process of designing and making models is divided into 3 important activities namely designing 3D design concepts using solid works software, designing a control system software with Arduino Uno and designing hardware models. Tool testing is done by testing the automatic humidity control system model on the prepared test chamber model. The results obtained from this study are models of automatic humidity control systems that can condition the humidity in the test room and maintain the humidity according to the setpoint.
Effect of Vibrating Fluidized Bed (VFBD) and continuous microwave drying on drying characteristic of green tea
Authors: Handayani S U , Yulianto M E , Sutrisno S , Ariwibowo D , Amalia R , Hartati I 
Published: March 2021

Abstract
In industrial green tea processing, people usually use endless chain pressure (ECP) dryers and fluidized bed dryers. ECP dryers have disadvantages including case hardening, uneven dryness, high energy consumption and long drying time, while fluidized bed dryers still have disadvantages of long drying time and high hot air capacity to ensure tea leaves can be fluidized perfectly. Therefore, another alternative dryer is needed that can overcome the problems in the ECP dryer and fluidized bed dryer. This study aims to determine the comparison of drying characteristics between vibrating fluidized bed dryer (VFBD) that have been developed previously with microwave dryers. Drying condition on both dryer was set at 80oC, the airflow velocity at VFBD was 1.09 m/s. Result shows the time needed by the microwave at temperature to dry 500 grams of tea leaves to reach a constant weight is 24 minutes, whereas if using VFBD it takes 85 minute. In VFBD, the constant rate period takes 25% of total drying time, and the rest is critical and falling rate period. While in microwave drying, around 50% of total drying time is constant rate period and the rest is critical and falling rate period. The falling rate period in VFBD requires longer time, which is up to 75% of the total drying time. Highest drying rate in VFBD dryer was 0.08 gr water/gr solid.min, while microwave dryer was 0.14 gr water/gr solid.min.
Maintenance information system development for Powerhouse Department on diesel engine manufacturer
Authors: Ardjo A S , Wardihani E D , Slamet A , Habiburrahman M H 
Published: March 2021

Abstract
The Powerhouse Department on a diesel engine manufacturer has the role of supplying electricity to all departments, especially the production department. The problem that arises is the recording of all maintenance and repair activities carried out in the logbook. The purpose of this research is to develop a maintenance information system that can record all maintenance and repair activities that can be recorded electronically. The method used is Object-Oriented Development (OOD). The results of the research are data of toolst, parts & spare-parts, maintenance history & engine damage, maintenance scheduling documents, and vendor & supplier data. The system was implemented on this manufacturer.
Design and fabrication of a transmission mechanism arm for rotational molding
Authors: Thi H N , Dang N V , Thu Ha Thai Thi 
Published: March 2021

Abstract
Compared with blow molding and thermoforming technology, rotary die technology has many advantages for manufacturing hollow plastic products. The purpose of this paper is to compute and design the transmission crank mechanism of the rotary die machine. The authors chose a reasonable solution to design the experimental model to produce flower pots with dimensions of 1000 x 400 x 400 mm. The principle diagram and the dynamic diagram of the machine are presented. Computation and design of main clusters and hand fabrication of the rotary die machine are investigated. The model of the transmission crank mechanism is fabricated to verify the validity of the proposed model.