Indonesia Conference Directory

Corresponding Author
Anis Roihatin

Institutions
1,3,4,5Mechanical Department, 2Electrical Department
1,2,3State Polytehcnic of Semarang
4,5National Kaohsiung University of Science and Technology, Taiwan

Abstract
Abstract-The objectives of this research numerically studies various effects on the performance of air-breathing microfluidic fuel cells for modeling the transport phenomena. The microfluidic fuel cells having a microchannel width of 1.0 mm and 50 µm in-depth with an electrode spacing of 0.3 mm. The concentration formic acid of 0.3 M, 0.5 M, and 1.0 M mixed with 0.5 M sulfuric acid (supporting electrolyte) in aqueous solution was used as fuel and another inlet a stream of 0.5 M sulfuric acid as an electrolyte which were varied at an inlet flow rate of 0.05, 0.1, and 0.5 mL/min. Firstly, a 3-D microfluidic fuel cell model was built using COMSOL Multiphysics 5.1 to simulate the fuel cell performance. Furthermore, both V-I curves obtained from simulation on different volumetric fuel flow rate. The transport phenomena in the microfluidic fuel cells were formulated with continuity equation, momentum equation, species transport equation, and charge equation. The porous media flow in the gas diffusion layer was described by Brinkman equation. The Butler-Volmer equations were applied to get the V-I curves.

Keywords
fuel cell

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/cLAUpRmbvdVX

Corresponding Author
Wimba Zainrona

Institutions
1School of Graduate Studies, 1 Management and Science University
2,3,4Departement of Electrical engineering 2,3,4Politeknik Negeri Semarang

Abstract
Abstract—The use of Wireless Sensor Network (WSN) for monitoring systems continues to grow, as it is required data analysis of a sensor node in which there is an accelerometer, use WSN system intended for structural health monitoring application. This monitoring system prototype, built by integrating software and hardware with device microcontroller and sensor. The node sensor produces data and processed with a microcontroller, the resulting data is then immediately transmitted to the cloud by internet network using MQTT. The system was built with a firmware-based Internet of Things (IoT) and this verified using accelerometer sensor node. The data has also been explored and analyzed in the time domain and frequency domain using FFT. Using MQTT, data can be sent directly to the internet in the form of raw data or graph data over time. And in this paper authors do an analysis of the raw data of the output sensor accelerometer ADXL345 and applied to monitor the bridge. From experiments, conducted output accelerometer sensor can vary depending on the sensitivity of the values.

Keywords
Keywords—accelerometer, fast Fourier transform, internet of things, monitoring, mqtt, shms, wireless sensor network

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/zQZDJXvBUT64

Corresponding Author
Bagus Yunanto

Institutions
1,2,3,5Information System, 4Informatic Technology
1Harapan Medan University, 2,3Semarang University, 4National Technology of Science Institut, 5STMIK YMI
1Medan, Indonesia, 2,3Semarang, Indonesia, 4Jakarta, Indonesia, 5Tegal, Indonesia

Abstract
Abstract— Small and Medium Enterprises (SME) is a form of business which triggers the economic growth of Indonesia and it can even survive in the economic crisis that had ever occurred in Indonesia. There are many obstacles faced by SME such as lack of capital, limited human resources and weak marketing as the spearhead of the company. So it takes a variety of strategies in the conventional promotion such as advertising on TV/ Radio, opening branches, following exhibitions, making banners and brochures. Of course, SME does not have enough financial to make promotion at an expensive cost, so the internet makes digital marketing becomes faster, accessible for 24 hours, cheap and free. Online marketing activities using social media have been done by the SME such as Facebook, Twitter, Instagram, Youtube and so on, because it has a tremendous impact. SME can use hard selling / soft selling sentences or post photos or upload videos so that it can be seen millions of people for free. But for effective promotion in social media, it is necessary to know the style of execution that has the attraction to get to the target market to be targeted. Indicators used for advertising selection are 1) Straight-Sell or Factual Message, 2) Scientific or Technical Evidence, 3) Demonstration, 4) Comparison, 5) Testimonials, 6) Slice of Life, 7) Animation, 8) Personality Symbol, 9) Imagery, 10) Dramatization, 11) Humor, 12) Musical, 13) Combinations. So it is necessary to support the advertising selection in social media by using Simple Additive Weighting (SAW) method so that the output is the rank of social media recommended to be selected by UKM Indonesia.

Keywords
Keywords—Decission Support, Advertising Selection, Social Media

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/jw3QnEr7ypYu

Corresponding Author
Leon Abdillah

Institutions
Department of Information Systems
Universitas Bina Darma
*leon.abdillah[at]yahoo.com

Abstract
The development of information technology has penetrated into a number of fields including financial services. Economic growth and the convenience offered by information technology-based devices such as smartphones have changed the face of the Indonesian economy towards a digital economy and involved FinTech. This study aims to find out how much Sharia-based FinTech services exist in Indonesia as the largest muslin country in the world. The author uses data released by the Financial Services Authority (OJK) as of August 2019. From this data, it can be seen that FinTech companies registered and licensed in Indonesia are still dominated by FinTech which operates conventionally. But in terms of utilizing the latest technology, FinTech companies in Indonesia have mostly used information technology, both Android and IOS based. Last but not least, the most used social media by Indonesia Fintech is Facebook. By looking at this study, it is hoped that the authorities and interested parties can take a step forward in order to increase penetration of information technology-based FinTech in Indonesia.

Keywords
e-Commerce; Information and Internet Services; Computer Software; FinTech; Technological Innovation; Technological Change; Technological Innovation

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/xTG3Cc6VvaJZ

Corresponding Author
eni wardihani

Institutions
1,2,3,4,5,6Department of Electrical Engineering
1,2,3,4,5,6Politeknik Negeri Semarang

Abstract
Abstract— Hydroponics is the cultivation of plants that use water as a planting medium without using soil. One of the simplest hydroponics is Deep Water Culture (DWC). DWC is a hydroponic technique that allows plant roots to always be submerged in water containing nutrients. The purpose of the application of controlling the level of hydroponic nutrient solution in the type of Deep Water Culture (DWC) in the box is to ensure that the roots of the plant are always submerged in nutrient solution so that the nutrients are still fulfilled. The results obtained from controlling the level of hydroponic nutrient solution in the type of Deep Water Culture (DWC) in the box is when the level of nutrient solution is less than the specified threshold then the 12VDC pump relay will live to drain the source water to the nutrient solution reservoir. The HC-SR04 sensor is used for reading the level of nutrient solution, so it has an effect on determining the pump life time. The HC-SR04 sensor has a reading error of 0.87%. The duration of the pump life is determined based on the linear regression equation. Controlling the level of nutrient solution based on linear regression linear calculation has a good accuracy of 88.6%.

Keywords
Keywords— Deep Water Culture, HC-SR04, Regresi Linier

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/ZfRd3qvn9LKu

Corresponding Author
ignatius Gunawan Widodo

Institutions
Departement of mechanical engineering ,Politeknik Negeri Semarang
Jl. Prof. H. Soedarto, S.H. , Tembalang Semarang 50275

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%. Keywords:

Keywords
misalignment, increase in vibration, adjustment

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/nXpJjQva9BwZ

Corresponding Author
Anis Roihatin

Institutions
1 Mechanical Engineering, 2,3Electrical Engineering
1,2,3State Polytechnic of Semarang

Abstract
Abstract - There are six state polytechnics aged 36 years old in Indonesia. The six polytechnics have machining workshops with the same number and machines. The problem that arises in Semarang State Polytechnic is the maintenance system that has not been integrated into a system, even though the electronic maintenance and repair activities have been carried out. The purpose of this study is to develop a maintenance information system that can control all of its activities well. The system is built with an object-oriented approach implemented by android. Research results include: database systems, web application systems, and android application systems that have delivered output correctly.

Keywords
Keywords— maintenance, machining, workshop, android

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/dYbQrgkqTZFG

Corresponding Author
Liliek Triyono

Institutions
1, 2,4 Mechanical Department, 3 Accounting Departments
1,2,3,4State Polytechnic of Semarang

Abstract
Abstract—The development of a Computer Numerical Controller (CNC) machine specifically for the manufacture of creative product crafts needs to be encouraged to improve the variety and quality of the products. Manual engraving of natural stone (marble, granite) by relying on the skills of people and simple equipment will produce a product with a long time of processing. Competition in the business and industrial world is needed to increase effectiveness and efficiency with short manufacturing time indicators, low prices, more and more interesting design variations. The research objective is to find effective and efficient machining parameters, analyze factors that influence surface roughness, and enrich the variety of creative product designs of marble stone materials. This study uses an experimental method approach which is a study to find the effect of spindle rotation variables, infeed speed, infeed depth on the quality of surface roughness by operating the CNC Machine Router 3-Axis. It was found that the the following parameters of the machine are cutting speed machining 30 (m / min), spindle rotation 12000 (rpm), and speed / feed rate 2000 (mm / min). Analysis of factors that influence the surface roughness of marble engraver the higher the speed / rate of infeed and the depth of infeed, the higher the surface roughness value of marble. Computer and engineering software applications are able to increase the variety of creative product designs.

Keywords
Keywords—CNC Router, engravired, granite, marble

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/JUj6WQ9cgXFR

Corresponding Author
Zaenal Abidin

Institutions
Departement of Mechanical Enginnering, Politeknik Negeri Semarang
Jl. Prof. H. Soedarto, S.H., Tembalang Semarang 50275

Abstract
PT. Indonesia Power UJP Central Java 2 Adipala is a 1 x 660 MW steam power plant with coal as its main fuel. Distribution of coal using Belt Conveyor 1 AB, 2 AB, 7 to the coal yard. The background of the problem is the process of releasing idlers on conveyors 1AB, 2AB, 7 takes a long time of 7 minutes 54 seconds. Idler replacement is done in the conventional way by hitting the idler with a hammer until it is released from the conveyor frame. The cause of the problem is the rust of the idler shaft on the conveyor frame and the process of releasing the idler in the conventional way. The impact of the problem is the conventional replacement of idlers making coal dust fly so that coal dust enters the respiratory system and the eyes and much. In addition, conveyor production time is lost due to a long replacement. The purpose of this research is to design an Idler lifter tool to accelerate the carrying idler release time on the conveyor. The research solution is to design an Idler lifter with a Hydraulic jack mechanism to lift the idler from the conveyor so that the idler release time can be reduced and does not make coal dust fly. Confirm solution was the result of research which included reducing idler release time by 3 minutes 49 seconds or reducing replacement time by 51.687% so that the amount of coal distributed was more than 62,553,859 tons and human labor was reduced by 90,744% in sloping position and 89.31% in flat position using the Idler lifter tool

Keywords
Conveyor, Idler, Idler lifter

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/YNAjhB9UgxbK

Corresponding Author
tri raharjo yudantoro

Institutions
Politeknik Negeri Semarang

Abstract
Abstract The charity box is a supporting facility that can be used by pilgrims to distribute their infaq. In this modern era, it turns out that the mosque still counts the contents of the charity box manually and uses the usual padlock key for the safety of the charity box. The purpose of this research is to build a system and tool that can simplify the performance of mosque administrators in counting money and maintaining the security of the charity box. Arduino-Based Charity Box Safety, Tracing, and Counter System is a charity box equipped with automatic counting and security features using RFID and GPS. The method used in making this system is the waterfall method. The features in this system are automatic counting and security features using RFID keys, GPS, buzzers, and infrared sensors. This system is also equipped with a notification to the mosque management regarding the amount of money in the charity box and the location of the charity box using GSM / GPRS. From the testing of the system, it was produced that the Arduino-Based Charity Box Safety, Tracing, and Counter System was able to detect banknotes and coins well. The SMS feature also works well where there will be an SMS message regarding the amount of money and location of the charity box. The safety of the charity box is enhanced by using RFID, GPS, buzzers, and infrared sensors. From the user satisfaction test results obtained by the percentage of user satisfaction by 85%, which means the Arduino-Based Charity Box Safety, Tracing, and Counter System is quite attractive to users. Keywords: Automatic money counter, Charity box, Color sensor, GPS, RFID, Load Cell sensor

Keywords
Automatic money counter, Charity box, Color sensor, GPS, RFID, Load Cell sensor

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/c2vCAzLaYZ7m

Corresponding Author
eni wardihani

Institutions
Department of Electrical Engineering
Politeknik Negeri Semarang
Jl. Prof. Soedharto, S.H., Tembalang, Semarang, Central Java, Indonesia
edwardihani[at]polines.ac.id

Abstract
The focus of this paper is power constrained in wireless sensor networks. We purpose an adaptive transmit power levels based on sensors noise variance and channel conditions. We also investigate its impact on energy saving. First, the measurement results of the sensors are quantized into discrete messages. Second, the quantized data are transmitted to the fusion center where a final estimate is generated. The optimal transmit power levels for each sensor is determined by the sensor noise levels and channels conditions from sensor to the fusion center. The goal is minimized the total transmitting power, while ensuring a given Mean Squared Error (MSE) performance. The sensor will be active when the measurement results of the sensors have low noises variances and the condition of the channel between the sensor and the FC is good and if the conditions are otherwise the sensor is not active with the aim of saving power. For the remaining active sensors, their optimal transmit power levels are determined jointly by individual channels gain, local observation noise variance sensor and the targeted MSE performance. Numerical examples show that an adaptive power levels achieves significantly smaller MSE than uniform power levels for the same average power consumption.

Keywords
adaptive quantization, uniform quantization, distributed estimation, wireless sensor networks

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/WdRYZe4khTVt

Corresponding Author
Bagus Yunanto

Institutions
1,3Postgraduate Program in Applied Midwifery Science, 2Department of Physics Faculty of Science and Mathematics
1,3Poltekkes Kemenkes, 2Universitas Diponegoro

Abstract
Abstract - Labor pain is usually severe and only 2-4 % mothers experience light pain during labor. Labor pain is treated pharmacologically, but it comes with side effects of breathing difficulty, lower uteroplacental perfusion, fetal bradycardia, increased need for oxytocin, and it is not cheap to administer. One of the pain management methods available is heat therapy. Heat therapy is conventionally performed using warm water zack or hot water compress using a towel. However, this method comes with disadvantages of unstable temperature, wet media, and non- continuous heat effect. This paper proposes pain reduction method using automatic heat therapy with proportional integral derivative (PID) controller. It makes use of heat from an electric heater attached to metal plate. The PID controller is used to manage the required heat. A temperature sensor is attached to the plate and provides input to the PID controller. Respondents involved were delivering mothers of Stage I Active Phase Respondents were treated with 450cheat for 60 minutes. There were three groups; intermittent group treated with 15-minute treatment, 5-minute pause, and 80th minute stoppage, continuous group treated with non-stop heat that was ended on the 60th minute, and control group given simple pain management by rubbing their backs. Analytical results show an effect of p value < 0.05. Test result on the effect of pain intensity with p value 0.000 means that there is an effect of heat treatment on the reduction of pain intensity for Stage I Active Phase labor.

Keywords
Keywords — PID, heat therapy, pain labor intensity, Stage I, active phase

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/ZDfLNpFT6Jnx

Corresponding Author
mst telkom

Institutions
Department of Civil Engineering Polytechnic State of Bandung Bandung, Indonesia

Abstract
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.

Keywords
Keywords—AC-WC, filler granite, deformation resistance, rutting, wheel tracking machine

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/HMXe8ZT6EBxy

Corresponding Author
Ahmad Wafa Mansur

Institutions
POLITEKNIK NEGERI SEMARANG

Abstract
This study aims to streamline the lecture attendance system and overcome indications of cheating on student absences in the lecture process in class. Manual attendance list causes lost time of lectures and waste of paper, and therefore the need for an attendance system to reduce these problems. Higher education with all its strategic activities cannot be separated from the importance of using information technology. One of the important activities routinely carried out by a tertiary institution is to record Academic Administration activities (teaching and learning process), this routine activity involves many interests both from the lecturers, administration and from the learning facilities and infrastructure they have. This activity must be made an information system in order to facilitate all parties and produce information that is fast and valid. One such information is student information about absence which can be caused by permission, illness or even negligence. This activity is carried out every day so that if an error occurs or negligence will harm all parties involved in the teaching and learning process therein. This article discusses how to design and build an Academic recording information system in the form of student attendance that can produce accurate and timely information available to meet the needs of students, Academic Administration and department managers so that the information system can be aligned with academic regulations and can be accepted by system users. The object used is the Semarang State Polytechnic Accounting Department. The method used is to use the Unified Model Language approach which consists of Use case Diagrams, Class Diagrams, Data Dictionaries. While the development model using waterfall, the stages include analysis of the existing system, concept design, physical design, implementation and testing. The output of the research is an Android-based student attendance information system application using QR Code which generates information for students, Academic Administration and department managers.

Keywords
Design and Development, Information Systems, UML, Waterfall, QR Code

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/N38d4xCjraQq

Corresponding Author
Jumi Jumi

Institutions
a) Bussiness Administration Department, Politeknik Negeri Semarang, Central Java, Indonesia
b) Civil Engineering Department, Politeknik Negeri Semarang, Central Java, Indonesia
c) Accounting Department , Politeknik Negeri Semarang, Central Java, Indonesia

Abstract
The development of information technology in the era of digital data is increasing rapidly and has become one of the variables of success in competition in the business world. It has an impact on the weak growth of small and medium of enterprises as call as UKM due to limited capital and lack of network marketing. The design and implementation of information technology-based marketing media using the internet is a basic necessity in the global competition of information business. On-line magnification media that have attractive and informative appearance are the main requirements for customers and prospective customers to be interested in visiting on-line showrooms. The number of website marketing visitors is one measure that the product is in demand by the community in addition to the number of products that have been sold. The number of web-based application providers makes it easy to build web marketing media online. Magento is an online marketing media application that is quite reliable and easy to change the layout of the online showroom layout. Marketing media designs that have been implemented can also be edited at any time for changes or improvements to both the appearance and content.

Keywords
media; layout;marketing; online; UKM

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/nJVLU3YHm2PR

Corresponding Author
Ampala Khoryanton

Institutions
Department of Mechanical Engineering, Semarang State of Polytechnic
Jalan Prof Sudarto, SH Tembalang, Semarang, Indonesia
*ampala.khoryanton[at]gmail.com

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 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 solidworks 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 set point.

Keywords
air humidity; automatic humidity control system; production quality; painting process.

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/BgRENdx6JPvp

Corresponding Author
Sri Utami Handayani

Institutions
(a-e)Vocational School, Diponegoro University, Semarang, Indonesia
(f) Chemical Engineering, Wahid Hasyim University, Semarang, Indonesia

Abstract
The main problem of the green tea industry today is the low quality and the high need for electrical and fuel energy of withering process (0.48 kwh / kg dry tea or 50.1% of total energy). For this reason, the development of withering process is needed through the high-efficiency agitated inactivator microwave system for producing green tea as a functional fine powder. However the development of engineering technology is still constrained by the integration of upstream into downstream energy processes. In addition, the thermal degradation of the product, caused by heat ionic conduction, penetrates to the tonoplast membrane, thus a small portion of the catechin in the vacuole will turn into theaflavin and thearubigin. Therefore, we need to study the temperature control profiling before it will be applied commercially. The results shows that the continuous microwave-based drying machine speed can be varied from 0.23 cm / s to 2.3 cm/s. The residence time in the microwave can be varied from 0.9 minutes to 9.23 minutes. While the temperature can be varied between 50 C to 120 C. The equipment can be used for withering process of green tea in accordance with the desired time and temperature. While experiments carried out for drying tea leaves give the result of drying time of 14 minutes to reach a moisture content of 0.2%.

Keywords
drying; green tea; microwave; withering

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/DwZgGJYATLdx

Corresponding Author
Sidiq Hidayat

Institutions
Politeknik Negeri Semarang, Indonesia, Jl. Prof Soedarto SH, Semarang, Indonesia

*) corrosponding author e-mail: sidiqsh[at]ieee.org

Abstract
Post-harvest problems faced by farmers in the form of grain drying, have been overcome by previous studies using a Wireless Sensor Network (JSN) dryer. The use of JSN in dryers is able to provide solutions to improve the accuracy of temperature and water content measurements in the drying chamber. Problems that arise after field trials are (1) the actual moisture content in the grain cannot be determined precisely and quickly (real time), (2) the separate dryer and grinder system has some disadvantages a.l. have to move the dried grain to the grinding machine, adding power, time and cost. In addition, many grains are wasted due to material handling, causing losses. For this reason, it is necessary to develop an integrated system (two-in-one) and that is equipped with quality sensors to determine the quality of grain and rice produced automatically. Grain and rice have different colors at different humidity levels. The use of humidity sensors based on grain color and rice color allows the measurement of water content to be done accurately and faster (real time). Grain and rice quality level sensor in this study uses image recognition based on its features. To determine the level of grain moisture recognition in this study using color features with the method of preprocessing edge sharpening and histogram equalization. Whereas the rice quality level classification sensor uses a combination of shape, color and texture features using the Invariant moment extraction method for shape features, color moments for color features and GLCM for texture features and K-means as descriptor clustering.

Keywords
rice quality; machine learning; sensor network

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/Ge7JzmxL69cw

Corresponding Author
Sidiq Hidayat

Institutions
Politeknik Negeri Semarang, Jl. Prof Soedarto SH, Semarang, Indonesia

*sidiqsh[at]ieee.org

Abstract
Broiler chicken farms with a close house cage system have not been able to create the ideal temperature for chickens and cannot be monitored through an application on a smartphone. The implementation of a temperature monitoring and control system in a chicken coop has already been done but the system still uses the SMS Gateway as the notification provider and the temperature is set manually with a button. Therefore, the purpose of this study is to create a temperature-based monitoring and control system based on Internet of Things so that the temperature and humidity in the enclosure can be monitored via smartphone users and the temperature is automatically maintained to be always ideal and equipped with notifications. Then the system is tested with several temperature conditions namely heat, normal and cold. Based on the three temperature conditions, the system responds to heat by dimming the lights and turning the fan quickly. The system response left at normal temperature is that the lamp remains dim and the fan rotates slowly. The system responds to cold temperatures by illuminating the lamp and making the fan spin slowly.

Keywords
Internet of Things, Broiler chicken, Blynk

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/fV7bZuaeXAcQ

Corresponding Author
Wimba Zainrona

Institutions
1,2,3,4,5Department of Electrical Engineering
1,2,3,4,5Politeknik Negeri Semarang

Abstract
Abstract— This research focuses on the use of RFID (Radio Freq uency Identification) systems that are used as personal identification cards in the room access system. This system is intended to maintain the security and privacy of the room from someone who does not have the authority to enter the room. This security system uses a two-tier security system, namely through an RFID identity card and security code. The design and implementation of this system, an electric key work system is evaluated based on the solenoid component and the password used when accessing the room. RFID tags used in this system are in the form of "Mifare RFID Card 13.56 Mhz" cards and store unique codes used as personal identification. This code is read by the RFID reader in validating its authority with Arduino Mega 2560 to regulate the system of electric locks and passwords used to open the door. From the test results, 100% RFID tags can be recognized by the RFID reader, 100% RFID tag and password reading system is successfully used to access the room.

Keywords
Keyword: RFID, Password, Arduino Mega 2560,security system.

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/dHGrqTzWVhKN

Corresponding Author
tedjo mulyono

Institutions
a)Department of civil engineering Politeknik Negeri Semarang, Central Java, Indonesia, b) Department of Bussisess Administration, Politeknik Negeri Semarang, Central Java, Indonesia

Abstract
Erosion processes - sediment discharges at the watershed scale, occurring on sloped land and in channels or rivers. Starting with the occurrence of rain, the process of sediment discharge in sloped land is affected by rain and surface runoff, the process can be represented as sediment storage in sloped land, and the process of sediment discharge in channels or rivers supplied by sediment material from sloped land, bottom erosion and river banks, then the process can be represented as a sediment reservoir in a river or channel. Therefore prediction of sediment discharges in watersheds can be done with the concept of a storage model that is the model that is represented to respond to sediment discharges in watersheds. One model with the concept of storage is a tank model. The specific objective of this research is to develop a tank model for prediction of sediment discharges in the watershed at the recession limb when rain is complete. The method used in this study is to use a computational simulation method to obtain optimum tank model parameters including stages: Setting field experiments, Tank Model Analysis Settings namely formulating and analyzing tank models for prediction of sediment discharges in watersheds (hydrographs) at recession limbs when rain has finished. The analysis shows that 4 tank models can be developed for prediction of sediment discharge in the Watershed. Configuring a good tank model for prediction of sediment discharge in the watershed is a model composed of 1 (one) tank consisting of 2 (two) side holes, a representation of the amount of sediment discharge and 1 (one) bottom hole, a representation of the amount of sediment deposits, which applied in the Kreo Sub-watershed. The parameters values and constants for the 1 (one) tank model for the Kreo Sub-watershed are a1 = 0.473; a2 = 0.111; a0 = 0.053; ha1 = 50,608 mm; ha2 = 2.544 mm, Ha = 0.415 mm; Ch = 168.83 mg / liter. The values of the tank model parameters in the watershed have different values according to the condition of the watershed under review.

Keywords
discharge; sediment; prediction; rain; tank

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/3NJP4b6fGEnM

Corresponding Author
Bambang Supriyo

Institutions
a) Magister Terapan Teknik Telekomunikasi, Politeknik Negeri Semarang, Jl. Prof. H. Soedarto, S.H., Tembalang, Semarang, Indonesia.
*bsupriyo7763[at]yahoo.com
b) Program Studi Teknik Mesin, Politeknik Negeri Semarang, Jl. Prof. H. Soedarto, S.H., Tembalang, Semarang, Indonesia
c) Program Studi Teknik Elektronika, Politeknik Negeri Semarang, Jl. Prof. H. Soedarto, S.H., Tembalang, Semarang, Indonesia

Abstract
This paper deals with the design of electronic system used for changing the transmission ratio of a rubber belt electro-mechanical continuously variable transmission (CVT) for motorcycle applications. The rubber belt CVT has input pulley, output pulley and a rubber belt which connects the input pulley to the output pulley. The belt transmits the speed and torque from the input to the output pulley by means of contact friction between the belt and the pulley surfaces. Each pulley set consists of one fixed and one sliding pulley sheaves. The axial position of the input sliding pulley sheave is controlled by an electro-mechanical system. This system utilizes the DC servomotor, actuator gears and cam mechanism. The sliding sheave of the output pulley is continuously pushed by contra spring to mantain the belt tension and prevent belt slip. By controlling the axial position of the input sliding pulley sheave, the input belt-pulley contact radius can be varied, hence changing the output belt-pulley contact radius and finally changing the transmission ratio. The axial displacement of the input sliding pulley sheave is detected using a two channel incremental encoder, while the rotational speeds of input and output pulleys are sensed using one channel incremental encoders. By knowing these two speed values, the transmission ratio of the CVT can then be determined. The microcontroller system of Arduino is used as a main controller to perform the transmission ratio changing of the CVT system. The results show that the electronic system can perform the CVT transmision ratio changings adequately.

Keywords
Rubber belt, CVT, Transmission ratio, Incremental Encoder, Arduino

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/GEkHTNUwZV7j

Corresponding Author
Amin Suharjono

Institutions
1234Environmental Engineering Department Diponegoro University, Semarang, Indonesia, huboyo[at]undip.ac.id, budisamadikun[at]gmail.com, oktomanullang73[at]gmail.com

Abstract
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.

Keywords
Keywords—air pollution, climate, distribution, domestic, transportation

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/KY3ZD6cnNRAk

Corresponding Author
Suparni Setyowati Rahayu

Institutions
1) Politeknik Negeri Semarang
2) Doctoral Program of Enviromental Science, School of Postgraduate Studies, Universitas Diponegoro Semarang

Abstract
Muffler industry has been closely related to wastewater processing before disposal into environment. Using an aerobic method, the wastewater can be converted into friendly of environment. Unfortunately, waste processing approach before its disposal into the environment has disadvantages. These disadvantages can be approached by a combination of clean production application and wastewater processing product. The production process in a company does not only result in the preferrable end product, but also provide non product output. This non product output may take the forms of material,water, and energy used for the production process but it cannot be the desired end product. Therefore, rather than obtaining added value, it tends to cause cost inefficiency for the industry. Besides, the non product output in the form of contaminant may have negative impact on the community and the environment. The objectives of this study were to identify and to evaluate the efforts of the clean production application by muffler industry in Purbalingga Regency, as well as to provide alternative to obtain good governance as an effort to put the clean production into practice. This study applied a descriptive method combined with engineering by explaining cost calculation for the muffler industry due to the existence of the non product output as compared to the total of production cost. This study revealed the inefficient use of raw material and water as well as hot spots. The calculation of the water, energy and material scales resulted in efficient use of raw material (72.37%), wastewater (82%), and energy (78%). The alternatives for the treatment/improvement dealing with the good governance as an opportunity for the clean production found during the observation were awareness of the required acceptance, monitoring and storage of the muffler raw material storage to produce high quality raw materials, and controlling the water and energy use during the production process.

Keywords
muffler, material, water, energy

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/anK8H7kQA9hy

Corresponding Author
Bagus Yunanto

Institutions
1,2Postgraduate Program in Applied Midwifery Science, 3Departement of Physics Faculty of Science and Mathematics, 1,2Poltekkes Kemenkes, 3Diponegoro University

Abstract
Abstract - Jaundice is a serious health issue. Late treatment of jaundice cases in babies may result in neurodevelopmental disorder and irreversible brain damage. Diagnosis inaccuracy is usually caused by the fact that health professionals and health service providers often rely on visual observation instead of laboratory examination. Lack of expertise in detecting jaundice is a serious matter. This research proposes a method of web-based digital image processing as an alternative for early detection of jaundice based on babies- complexion. Images of babies- complexion and color calibration cards are taken to obtain images for online analysis. Determination of bilirubin levels is carried out using the method of Euclidean approximate distance of RGB values from babies- complexion and those of color calibration cards. Results show correlation of Euclidean distance to bilirubin level of babies of 0.93596 and web-based digital image processing accuracy of 90%. These mean that the information system developed here is capable of detecting jaundice cases. This research was performed observationally in high-risk prenatal ward involving 30 infants as samples.

Keywords
Keyword - Euclidean distance, Image processing, Jaundice, Web based

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/6FDYqQHNByJL

Corresponding Author
Bambang Supriyo

Institutions
1Magister Terapan Teknik, 3 Program Studi Teknik Elektronika, 2,4,5 Program Studi Teknik Mesin
1,2,3,4,5Politeknik Negeri Semarang

Abstract
Abstract— Transmission ratio change in today-s motor cycle rubber belt Continuously Variable Transmission (CVT) are based on centrifugal forces resulted from engine revolution. Compare to manual transmission, this kind of CVT needs higher engine revolution to start engaging the transmision ratio which in turn requiring more fuel consumption. A transmission ratio change concept based on an Electro-mechanical actuator consisting of cam, actuator gears and DC motor has been developed to eliminate the dependancy of transmission ratio on engine revolution. The DC motor rotates the cam through actuator gears. The rotation of the cam causes the primary movable pulley sheave to move in axial direction, which in turn changing the belt-pulley pitch radius and changing the transmission ratio. This research aims to design and implement an electronic measurement system based on Arduino Uno as a data acquisition system and Matlab/Simulink as a controller program to obtain the measurement data of primary pulley and secondary pulley speeds and primary pulley axial position. Based on these data, the transmission ratio can be determined and the relationship between transmission ratio and primary pulley posistion can then be obtained. For future development, these measurement data will be used as important references when developing and testing the transmission ratio controller programs.

Keywords
Keywords— Rubber belt, electro-mechanical CVT, transmission ratio, ArduinoUno, Matlab/Simulink

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/XH7bhZDxqPrN

Corresponding Author
Bagus Yunanto

Institutions
Department of Civil Engineering, Bandung State Polytechnic, Bandung 40012, Bandung, Indonesia

Abstract
Abstractt—This research was purposed to study the composite behavior and the increased capacity of reinforced concrete beam strength under flexural loading caused by external strand strength without stressing. The specimen is divided into 2 types. Type-I specimen has (150 x 300 x 3200) mm dimension with center point loading, and distance of strand clamp as (U- bars) variable; whereas, the Type-II specimen has (200 x 300 x 3200) mm dimension with third point loading, and the number of strand as variable. The test is carried out by static-monotonic loading, and displacement control. Experimental test results shows that the addition of strand on the lower surface of the beam increase the beams load capacity. However, the use of U- bars affects the stability of the concrete. The tighter distance of the U-bars decrease the capacity of the strengthening occured. The increased load capacity of Type I specimens, S3-150, S5-150 and S9-150 are 33.2%, 17%, and 12.1% against control beam (BK-150), respectively. Whereas, the increased capacity of the type-II beam strength of test specimens B1-200 and B2-200 are 10% and 17% against control beam (BN-200), respectively. And the increase of initial stiffness of beam Type-I test specimen S3-150, S5-150, and S9-150 are 14%, 18% and 5% against control beam (BK-150), respectively. Meanwhile, the increase of initial stiffness of Type-II beam of test specimens B1-200 and B2-200 are 21% and 24% against control beam (BN-200), respectively. This study shows that concrete and strand bonding is not compatible. The concrete has been reaching the limit strain, as well as the steel reinforcement in the concrete has been in yielded; meanwhile, strand that has fy is much higher than fy of reinforced steel,is still in elastic condition.

Keywords
_ External strengthening, strand, clamp strengthening, composite, bonding_

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/3xmb8GMgJqQd

Corresponding Author
Liliek Triyono

Institutions
1,2,3,4Dept. of Electrical Engineering
1,2,3,4Politeknik Negeri Semarang

Abstract
Abstract-- The physical ability of the elderly will decrease along with the aging process, thus increasing the potential for falls. An elderly person who has experienced a fall and is not detected for a long time will bring many possible consequences. Early detection of an elderly fall will help to minimize this possibility by reducing the time between the occurrence of an event and the arrival of medical assistance The purpose of this research is to build a Fall Detecting Clothes in Realtime Based Art Full Body Motion Capture System Using Multiple Inertial Sensors. This system builds by Waterfall methodology where every research step is done in sequence, start from analysis, design, coding, testing. Testing methodology is black box, which is a test every feature function. The Fall Detecting Clothes in Real Time Based Systems Full Body Motion Capture System Using Multiple Inertial Sensors has been tested using black testing box with the results of all feature functions working properly. The system has been tested with several conditions with the results of all controls and output data works properly as well.

Keywords
Keyword—fall, clothes, elderly.

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/v8rMyEa3bDhp

Corresponding Author
Bagus Yunanto

Institutions
1,2,3,4Department of Electrical Engineering, 2Computer Engineering
1,2,3,4,5Politeknik Negeri Sriwijaya

Abstract
Abstract --This research aims to produce a GPS-based fire detection system (Global Positioning System) and SMS Gateway. The benefits of this detection system can detect early fire occurrence based on the detection of temperature conditions by accommodating the nature of the fire and able to detect any rise in temperature caused by the existence of the fire. This detection system must also be able to read any smoke produced by a fire. To realize the system, required sensors capable of reading the temperature and smoke. The Arduino Uno microcontroller is the brain control system of the system. At a temperature of> 35 C, the system will activate the DHT 11 and MQ 2 sensors that detect smoke> 50 ppm from fire. The system will activate Buzzer as a warning in the form of the next alarm sound Global Positioning System (GPS) will provide information in the form of coordinates of the location of the point of fire through GSM SIM900 Module Short Message Service (SMS) to the user. The results obtained mq2 = 128 ppm and temperature value = 38 ° C and GPS data with latitude of -3.04798388 and a longitude of 104.78263092. From the data it is seen that the mq2 value reaches> 50ppm and the temperature value reaches> 35 ° C, and the detector outputs buzzer sound and warning notification of coordinate point in the form of SMS containing the message "FIRE available" with the coordinates of the location of the fire detected by GPS .

Keywords
Keywords -- Detector, Fire GPS, SMS

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/pwkxe2EtArMK

Corresponding Author
Nazaruddin Sinaga

Institutions
Mechanical Engineering Department of Diponegoro University

Abstract
The performance of a motorcycle engine is greatly influenced by the cooling system. If the heat is released more than it should be then the efficiency will decrease. Thus, the engine block cooling system must be designed optimally. The research aimed to study the effect of motorcycle speed, turbulence intensity, and tilt angle on the heat transfer coefficient of the engine block cooling system. Calculations were performed numerically using a finite volume method. The engine block was modeled as an annular fin cylinder which had a stroke volume of 150 cc, where the outer and inner diameter was 78 mm and 62 mm, respectively, while the fin thickness was 2 mm. The simulated vehicle speed was 40 to 100 km/h at 30 oC air temperature. The turbulence intensity were varied between 0 to 20%, while the tilt angle were 0 to 90 degrees. It was found that there were an optimum condition which give the highest heat transfer coefficient. It can be concluded that the numerical simulation can be used to design an optimal motorcycle engine block cooling system.

Keywords
motorcycle; engine block; heat transfer; numerical method; turbulence intensity; tilt angle

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/32ZDEWdbnyzh