Indonesia Conference Directory

Corresponding Author
Bagus Yunanto

Institutions
Marine Engineering Department ,Shipbuilding Institute of Polytechnic Surabaya (SHIPS)

Abstract
Abstract—Fuel system modification techniques to improve engine efficiency could be the way to slow down the energy crisis caused by the lack of new fuel inventions. The Compression Ignition (CI) diesel engine is one of the most preferred engines for both in-land and marine transportation motors. The advantages of compact dimensions and large generated power make CI diesel engine superior to other engine types. The large number of single CI diesel engines use in small fishing vessel engines and agricultural machinery will contribute substantially to fuel consumption in a cumulative manner. Previous researchs on the modification of fuel system with bi-fuel system High Speed Diesel (HSD)oil – Liquified Petroleum Gas (LPG) system capable of reducing Brake Specific Fuel Consumption (BSFC) up to 24% and exhaust gas opacity up to 68%. Subsequent studies focused on engines with single fuel HSD oil but were injected with superheated steam in 1 atm (abs) 130 oC by utilizing Heat Recovery Generating System (HRSG) using heat of exhaust gas for a flowrate of 1.5 - 4.5 kg/hour. It is capable of delivering the performance improvement of Specific Fuel Consumption (SFC), which is reduced by 8.92% compared to diesel engines without steam injection. Recent research combines the above two modification methods so that diesel will adopt two types of fuel- oil-LPG with additional superheated steam injection resulting from exhaust gas heat cogeneration system. Experimental results of the diesel engine with LPG injection maintained at 0.4 kg/h and 3.5 kg/h superheated steam with an engine variation loading of 0.3-0.7 kWh provide an average AFR of 30.09 and SFC improvement up to 37.2% lower than SFC engine standard with a single fuel HSD oil.

Keywords
Cogeneration, steam injection, diesel engine, energy efficiency, SFC

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/F6HZGRQ8yvrN

Corresponding Author
Wimba Zainrona

Institutions
1Faculty of School of Graduated Studies, 2,4Faculty of Information Sciences and Engineering, 3Faculty of Telecommunication engineering
1,2,4Management and Science University

Abstract
Abstract— In this survey, the comparison of highlights on the importance of energy saving in IP over WDM (IPoWDM) is presented and followed by the review on the existing related article by using systematically data review based inclusion and exclusion criteria. The adaptive clock frequency, sleeping mode, and hybrid grooming mechanism protection is the latest breakthrough in the IPoWDM mechanism. The researcher identifies trend of survivability is divided into three protection: link scheme, path protection and restoration. This paper focuses on the techniques and methods employed, and analyze the difference from the latest article review. The analysis based on the literature review indicates the development in the research trend and estimates the energy saving based on the techniques, mechanism and modeling and protection scheme by identifying the advantages and benefits for the next research. Results of obtained, we viewed from the ease and the great impact on power saving, the technology of sleep mode on the standby network is possible. The scheme that is carried with a protection mechanism is set to sleep and wake quickly. The easiness is a principal aspect that encourage to look into best protection strategies to save power in IPoWDM networks. Nevertheless, these does not prevent the possibility of development another mechanism. Finally, the potential for future research directions are also discussed.

Keywords
Keywords— Energy Consumption, Power Consumption, IP over WDM Network, Survivability

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/yjqdeh3pWzcg

Corresponding Author
Muhammad Burhanudin Harijadi

Institutions
Diponegoro University

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.

Keywords
Cellular, energy, battery, capacity, fuzzy

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/kjgyJeF7nhWT

Corresponding Author
tedjo mulyono

Institutions
1,Department of civil engineering 2,3 Department of Bussisess Administration, 1,2,3Politeknik Negeri Semarang,

Abstract
Abstract-Uncontrolled erosion would cause considerable damages, such as soil fertility decline, water structures damage and reservoirs sedimentation. As the data for the sedimentation rate are limited, several models have been developed to predict the surface erosion and the rate of sedimentation. However, the availability of sufficient, diverse and extensive data are needed for the implementation of the models, both for the model calibration and the verification. The result of the analysis shows that both of the Tank Models that represent the erosion- sedimentation rate process, in which Tank Model 1 being the three-tank cascade system and Tank Model 2 being two-tank cascade system, are not optimum. This can be observed from the values of volume error (VE), relative error (RE), root- mean-square error (RMSE) and correlation coefficient (R) that show the effect of 1.5 hours of rain period in the sedimentation rate. The field condition shows considerable sedimentation, on the other hand, the models- simulations show decreasing sedimentation rates. The optimum model-s parameters for Tank Model 1 and Tank Model 2 are 924.51%-1049.26% for the relative error, 50.81% - 121.42% for the volume error, 0.9 for the correlation coefficient and 6703.59- 17,297.85 for the root-mean-square error. The parameters and constant-s values of the models are different relative to watershed condition.

Keywords
Keywords: Sedimentation rate, surface runoff, rainfall, tank model

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/mCdek3xqUyB4

Corresponding Author
Heriansyah Putra

Institutions
(a) Dept. of Civil and Environmental Engineering, IPB University, Bogor, Indonesia
*heriansyahptr[at]apps.ipb.ac.id
(b) Dept. of Civil and Environmental Engineering, Ehime University, Matsuyama, Japan
(c) Dept. of Civil Engineering, Politeknik Negeri Semarang, Semarang, Indonesia

Abstract
The applicability of bio-chemical grouting as the environmentally friendly and economically method for soil liquefaction prevention was evaluated. Several combinations of organic and in-organic precipitations methods were conducted to obtain the optimum grouting solution. Organic precipitation method employs a bio-agent of urease enzyme to dissociate urea into ammonium and carbonate ions. The produced carbonate ions are precipitated as calcite crystals in the presence of calcium ions. Meanwhile, the in-organic methods were performed using chemical compounds only, without the bio-agent. Unconfined compressive strength (UCS) tests were performed to evaluate the applicability of the grouting solutions for improving the soil strength. Grouting solution is injected into the prepared sand samples. The sand samples with a relative density of 50% were treated with one and two PV for 3-day curing times. The experimental results showed that the organic precipitation method produced the high precipitated amount and resulted in the significant improvement in the strength of the treated sand. The presence of the precipitated materials within the grains of soil generated the strength of 272 kPa. The results of this study have elucidated that the organic precipitation method composed of calcium chloride, magnesium sulfate, urea and enzyme of urease may be an alternative soil-improvement technique to prevent the liquefaction susceptibility.

Keywords
biochemical, grouting, liquefaction, soil improvement, UCS

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/axyVDpg27AjW

Corresponding Author
Wimba Zainrona

Institutions
1Faculty of School of Graduate Studies, 1Management and Science University, Malaysia
2,3Department of Electrical Engineering
4Department of Civil Engineering
2,3,4Politeknik Negeri Semarang

Abstract
Abstract - Based on the planning guideline of Health Monitoring System of Bridge Structure of Kementrian Pekerjaan Umum dan Perumahan Rakyat, one of the main components needed in bridge health monitoring system is a communication system. The application of the WSN (Wireless Sensor Network) function to perform monitoring can be used to create a more practical system. Based on the system, required hardware that can be integrated with the software and can connect on wireless. Proposed methods using WSN (Wireless Sensor Network) on devices, then do testing on connectivity to obtain network quality and data sensor. Data sensor will be uploaded on the cloud can be accessed from various places that connected to the Internet network thus forming an IoT (Internet of Things) based system with using Message Queue Telemetry Transport (MQTT) protocol. Experiments carried out in two ways of connectivity, point-to-point and star topology to determine the network quality of each device, which is Node MCU and Mi-Fi modems. Network quality parameters can be known by looking at the value of packet loss, delay, jitter, and throughput. In the results, the MQTT Protocol applied to build IoT system. In addition, proposed methods that used in this research has a great quality network with packet loss <25 ms. However, there-s a big gap between serial data and online data that makes MQTT protocol is not suitable for monitoring systems that require fast data transfer.

Keywords
Keywords - Accelerometer; Internet of Things; Monitoring; MQTT; QoS; SHM; Wireless Sensor Network.

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/2xtjUBkFE4Ab

Corresponding Author
mst telkom

Institutions
1,2,3Civil Engineering Department Politeknik Negeri Bandung , Bandung, Indonesia

Abstract
Abstract—Many methods can be used in the repair of bridges or other structural buildings. The aim is to increase the existing capacity. In the reinforced concrete beam structure, capacity of structural elements can be carried out by reinforcement method. The research was done by experimental loading test in laboratory. The test objects are consisted of 2 (two) reinforced concrete beams : a normal beam without reinforcement (NB) and a reinforcement beam by using non- stressing srand (RB1). The dimensions of the beams are 150mm x 300mm x 3200 mm. All beams are loaded by static- monotonic load until collapses. From the results of the research, the first yield load for the NB beam and RB1 beam respectively are 22 kN and 29kN. The deformations that occur at the conditions are 9.5mm and 14mm respectively. The collapse occurring on the NB beam is the bending collapse, whereas in the RB1 beam is a bending- shear collapse.

Keywords
Keywords— concrete beam, reinforcement method, non- stressing strand, static-monotonic load

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/qATaDRGyF42t

Corresponding Author
Sahid sahid

Institutions
POLINES

Abstract
The objective of the design of a three-layers flat blade smart wind turbine with an arduino blade angle configuration system is to study experimentally the performance of a wind turbine Three-layersflat blade horizontal guide with various wind speed variations, and apply automatically to blade blade speed average for weather. Tests are carried out to obtain the value of wind turbine power coefficient (Cp). Tests that use variations in wind and blade angle. Variations in wind speed are obtained by variations in refineries from wind turbines. The performance of Three-layersbflat blade wind turbines has the highest Power Coefficiency (Cp) values at certain blade angles on variations in wind speed at a wind speed of 5 m / sec with a blade angle of 15º at 57.84%; at a wind speed of 6 m / sec with a blade angle of 20º of 36.24%; at a wind speed of 7 m / sec with a 25º blade angle of 51.39%; at a wind speed of 8 m / sec with a blade angle of 30º of 39.37%; and at a wind speed of 9 m / s with a blade angle of 35º of 28.24%. After obtaining data about wind speed and angle with the highest Cp value, the wind speed that will be used as the input of the Arduino control system, and the output is a large blade blade that changes to adjust the wind speed

Keywords
Wind turbine control, blade angle, Arduino, three-layer flat

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/LPc7BMTGbxXg

Corresponding Author
Muhammad Faiz Alfatih

Institutions
Program Magister Teknik Elektro, Departemen Teknik Elektro Fakultas Teknik, Universitas Diponegoro

Abstract
The development of robot technology is currently growing rapidly, mobile robot is one of the robots with many applications in everyday life. One important thing in the field of cellular robots is the problem of trajectories or trajectories, in this case how the robot can track the approved path. In this study, the cellular robot control system has been tested to track tracks. The path used in this study is the third-order Bezier Order, with control points and end points of the predetermined pathway. Based on the results of simulation tests on the development of mobile robot trajectories, the reality is that the performance of the trajectory system based on the Bezier curve trajectory is highly dependent on the placement of the bezier curve control points or in other words the actual trajectory formed by the robot is greatly influenced by the shape of the bezier trajectory that was designed.

Keywords
Mobile Robot, Trajectory, Bezier Curves.

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/zjLyRHMUu4xN

Corresponding Author
Yurianto Yurianto

Institutions
yurianto, Sumar Hadi Suryo, Yusuf Umardani
Diponegoro University
Faculty of Engineering
Mechanical Engineering Department

Padang Yanuar
Semarang State Polytechnic
Mechanical Engineering Department

Abstract
Generally, welding on quenched and tempered steel conducted using preheat and post-heat to avoid failure of the weldment. Some operators do not preheat before welding and post-heat after welding is complete. In this study, Q&T Steels welded using double-pass without preheating and post-weld heat treatment. Some operators do not use preheat and post-weld heat treatment, even welding is finished cooled by using water medium. Microstructural and mechanical evaluations of quenched and tempered steel welded joints investigated to reveal the effect of water quenching on the heat-affected zone in this study. Austenitization used for quenching are 750oC, 800oC 850oC and 900oC were selected. The specimens observed by spectrometer for observation in chemical element content; optical microscopy for observation in microstructure; microhardness Vickers tester for hardness observation in microstructure; impact testing machine for observation in impact energy. The aim of this study to obtain the characteristics of Quenched and Tempered Steel weld joints cooled by freshwater. The results indicate the hardness of the heat-affected zone increases with increasing austenitization temperature, but the hardness of the weld metal decreases.

Keywords
austenitization, crack, hardness, softening, temper

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/C8RrwgbN4Hfe

Corresponding Author
Riles Wattimena

Institutions
4Politekniknegeri Semarang, Jl. Prof Sudarto S. H., TEmbalang Semarang 50275

Abstract
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.

Keywords
Prestool design method, VDI 2222, sighley-s mechanical engineering design

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/bmhGBtpXaHU6

Corresponding Author
Bagus Yunanto

Institutions
Faculty of Information Science & Engineering Management and Science University, Shah Alam, Malaysia,

Abstract
Abstract—Number of vehicles continues to increase in the urban place parallel with the infrastructure advancement. The increase of vehicles on road causes various problems and obstacles to find an empty parking slot. This problem often causes congestion, waste more effort and time-consuming process especially during rush hours when many people are driving for various reasons. In this paper, we explore the concept of smart parking based on the application of their categories and explain the classification from various parking support technologies. Present developed parking system supported by various technologies and the category. Classified the application function of this survey. The application of this smart parking application might assist in reducing congestion and other issue by manage the parking process. Achieve the key objective of this research as stated by various scientist and researcher to deliver an advanced parking system. Conducted by developing an application interface base on a mobile, desktop and web. It is an excellent determination for the parking management to deliver a real-time information update on the parking area, which is the point of interest as an improvement to the existing system and research.

Keywords
Keywords—Smart Parking, Parking Problem, Mobile application, Desktop Application, Web Application.

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/m2k6Kyp9dMfu

Corresponding Author
Ampala Khoryanton

Institutions
a)Department of Industrial Engineering Widyagama University of Malang, Malang, Indonesia
emma_budi[at]widyagama.ac.id

b)Department of Mechanical Engineering Brawijaya University of Malang, Malang, Indonesia

c) Department of Industrial Engineering Brawijaya University of Malang, Malang, Indonesia

d) Department of Mechanical Engineering Polytechnic State of Semarang, Semarang, Indonesia

Abstract
Industry in the 4.0 era, remains relevant to be expected to pay attention to sustainable development. It still pays attention to future generations in meeting their needs. So the industry must continue to pay attention to environmental sustainability and human welfare, in addition to achieving profits. Moreover, Indonesia in this decade, there will be quite a number of productive young generation, so it is hoped that the potential amount of human resources will bring many benefits to the sustainability of the earth. This paper presents strategies that can be applied by the industry in human welfare, as a form of responsibility for the industry to help protect the earth from extinction (in accordance with the concept of sustainable development). Data was collected through interviews, discussions with several profesionals in the industry and some references. After the variables are obtained, they are verified and prioritized, to find out what needs to be done first.

Keywords
sustainable development; industry responsibility; human welfare; human resources.

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/VGYjnCaZKB8W

Corresponding Author
Sugeng Ariyono

Institutions
(a) Mechanical Engineering Dept., Politeknik Negeri Semarang.
(b) Electrical Engineering Dept., Politeknik Negeri Semarang

Abstract
Good ride performance is one of the most important key attribute of a passenger vehicle. One of the methods to achieve this is by using continuously variable transmission (CVT). This is because a CVT has the capability of providing an almost infinite ratio within its limits smoothly and continuously. The flexibility of a CVT allows the driving shaft to maintain a constant angular velocity over a range of output velocities. Currently, new developments in gear reduction and manufacturing have led to ever more robust CVTs, which in turn allow them to be applied in more diverse automotive applications. As CVT development continues, costs will be reduced further and the performance will continue to improve, which in turn make further development and application of the CVT technology desirable. This cycle of improvement will offer CVT a solid foundation in the worlds automotive infrastructure. The purpose of this paper is to provide some background and relevant information that is necessary in this study. Specifically, a brief description of CVT, advantages and their brief history are presented. This paper also evaluates the current state of CVT, investigate the technology frontline of drivetrain control and the development of CVT. The step less Transmission is able to maintain the engine running in its maximum power.

Keywords
CVT Control, Engine Power, Mechatronic CVT, Transmission

Topic
Mechanical Engineering

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

Corresponding Author
BASUKI SETIYO BUDI

Institutions
1) Politeknik Negeri Semarang
Jl. Prof. H. Soedarto S.H., Tembalang, Semarang
basuki.setiyo.budi[at]polines.ac.id
2) Universitas Diponegoro
Jl. Prof. Soedarto, SH Tembalang, Semarang
wahjukris[at]yahoo.co.id

Abstract
The general objective of the activity which involves the Application of Techno Ecology of the Water System as an Effort to Fulfill Water Needs of Agricultural Irrigation for the Community of Water User Farmer Association of Bumijawa District, Tegal Regency as an effort to meet the needs of agricultural irrigation water and facilitate the downstream process of Techno Ecology of the Water System resulting from community research. this can improve the quality and competitiveness of the Techno Ecology based Water Science and Technology system, establish and strengthen the network between technology makers of the Techno Ecology of the Water System and the technology users who have problems raising water from the river to meet the needs of agricultural irrigation water and improve the welfare of the community agricultural irrigation water users resulting from the Techno Ecology of the Water System. The specific target to be achieved is to disseminate the Techno Ecology of the Water System to get the technology to lift water from the river with a depth of approximately 20 meters below agricultural land. The method used is through several stages in the application of technology to the community by implementing together with partners identifying irrigation water needs by counseling, designing and calculating Appropriate technology (TTG) design drawings, making Appropriate technology (TTG), operational assistance by implementers in operating Appropriate technology (TTG) in a sustainable manner. Dissemination of technology to the community / partners by disseminating information on appropriate technology to the community through joint implementation with partners from the manufacturing process to the use of Appropriate technology (TTG). Work procedures to support the realization of the methods offered, counseling, equipment design and manufacturing, equipment work procedures, Appropriate technology (TTG) dissemination, assistance. Partner participation in the implementation of the establishment of an Institutional Forum, mapping of water distribution layouts, development of water distribution layouts, Design of water systems, the process of preparing work procedures, participating in the extension of water use / distribution in the Techno Ecology of Water Systems. The target of the Techno Ecological Equipment of the BEWRAM Water System as an irrigation water reservoir so that farmers can increase the productivity of agricultural products

Keywords
Techno Ecology, BEWRAM Water System, Agricultural Irrigation

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/xN8daCA7Wq4t

Corresponding Author
Nazaruddin Sinaga

Institutions
Mechanical Engineering Department of Diponegoro University

Abstract
The heat transfer on a motorcycle engine block is quite complicated but can be solved computationally. To simulate the calculation, an appropriate turbulence model is required. In this study, the effect of eleven turbulence models was analyzed in the simulation of a motorcycle engine block cooling using finite volume method. The turbulence models tested were Spalart-Allmaras (vorticity-based and strain/vorticity-based), k-e standard, k-e RNG, k-e realizable (all with standard wall functions and enhanced wall treatments), k-omega standards, transition k-kl-omega, and transition SST. The engine block was considered as a cylindrical finned tube with a specified size. In this work, several essential parameters were observed, such as the heat transfer coefficient, wake area, horseshoe vortex, and pressure drop. The calculation results were analyzed and compared with the results of previous studies. Based on the heat transfer coefficient results, it was found that all turbulence models agreed well with the experimental results, but there were significant differences in the pressure loss calculation. Based on the accuracy and computational cost, it can be concluded that the Spalart-Allmaras and the transition SST are the turbulence models which give optimum result for calculating the heat transfer in a motorcycle engine block.

Keywords
engine block; heat transfer; numerical method; turbulence model

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/rtbYCgKMQ72f

Corresponding Author
Liliek Triyono

Institutions
Politeknik Negeri Semarang

Abstract
In daily life, people with visual impairment have difficulty in their activities, especially at home activities. People with visual impairment as of 2017 reached 1.5 percent or around 3.75 million people from the population of Indonesia and more than 253 million people worldwide. The number of blind people who are not small need help to get a good quality of life and independent. Friendly home design for the blind is not yet available specifically. It is a particular difficulty for blind people to access the latest electronic goods or information (news). Then this becomes the basis of this research on how to provide easy access for blind people. This research provides a solution that is designing a prototype of a house that is visually impaired in addition to the use of electronic equipment. This system starts from the microphone as a sensor in charge of picking up sound and then the results are processed by Android and then connected to NodeMCU via Wi-FI. The microphone used is the default microphone of the Android smart phone. By using the speech recognition method the command is enough to say the keywords, Android will manage the sound into a code that will be sent to the microcontroller to perform the task. There are several categories of commands that can be handled, including (a) Turning on / off electronic devices, (b) Providing news information from popular news web portals, (c) Entertainment by playing streaming radio and (d) General information on hours and dates. All planned functions are running properly, there are some features that might be developed further. Adding sensitivity to starting voice commands and adding the ability to read long stories can be further research.

Keywords
Blind, Smart Home, IoT, Voice Recognition

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/U6HvnKDThNPc

Corresponding Author
Liliek Triyono

Institutions
1,2,3Politeknik Negeri Semarang

Abstract
Abstract-The increase in the population causes the problems faced are also increasing. Problems that arise include that, the number of accident victims who have recently often occurred on the highway, where the victims of the accident suffered minor injuries to severe and some even have to take lives due to accidents on the highway. And the second is crime, like a murder case that can take someones life. Often victims do not carry identities, making it difficult for the police or related parties to identify victims of accidents and killings. This system is made in the hope that it can help the police or related parties to be able to recognize the face of the victim without an identity just by using the android application. So that it can save more time in identifying the identity of the victim. Victim face recognition algorithm using Facial Landmark Detector and for its implementation using the Dlib library. To do facial recognition, it is done by taking pictures of victims using an application on android which is then sent to the server for the recognition process. After the image is sent to the server, the recognition process will be carried out, the results of the introduction process are sent back to android to display the results. The level of accuracy of the victims face recognition with a wound if using a tolerance of 0.35 is 100%, but if using tolerance 0.2 the level of accuracy is only 25%. Keywords: Android, Face Recognition, Face Detection

Keywords
Keywords: Android, Face Recognition, Face Detection

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/wr7LDUqtYbch

Corresponding Author
Bagus Yunanto

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

Abstract
Abstract — The high prevalence of postpartum depression significantly increases maternal morbidity. Lack of diagnosis for postpartum depression results in mothers missing early treatment necessary. The traditional screening method using questionnaire presents its own disadvantage in diagnosis. Therefore, development of postpartum screening method that focuses on ease in implementation is very much needed to improve postpartum maternal health. This paper proposes a screening information system for postpartum depression to help its proper treatment. This research employed the rule-based method to diagnose postpartum depression and the expert system to input symptoms data that will result in diagnoses. Respondents input symptoms data to be diagnosed by the system. The system then automatically generate output of suggested treatment based on expert input associated with the diagnoses the system is working on. This research employed the Randomized Control Trial method with Control Group Pre and Post Tests Design. Samples of this research were 52 postpartum mothers consisting of 26 respondents in the system group, and the other 26 in the manual group. Results show that 42.31% (n=11) of mothers suffer from postpartum depression. There is a significant difference in EPDS score prior to and after the use of the information system (P=0.000). The system also successfully generated very high TAM score, meaning that it is capable of postpartum screening along with ease of use and some other advantages. Therefore, screening for postpartum depression using information system is very effective and ensures proper and timely treatment.

Keywords
Keywords — postpartum depression, screening, information system, expert system

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/pKbzV3JgBjhf

Corresponding Author
Bagus Yunanto

Institutions
1Midwifery Program, 2Postgraduate Program in Applied Midwifery Science, 3Department of Physics Faculty of science and mathematics, 1STIKes Aisyah Pringsewu, 2Poltekkes Kemenkes, 3Diponegoro University

Abstract
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.

Keywords
Keywords - early detection, anemia among pregnant mothers, information system, rule-based

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/VZcNytLJvwj3

Corresponding Author
Yusuf Dewantoro Herlambang

Institutions
Politeknik Negeri Semarang

Abstract
This study examines a 5-blade Horizontal Axis Wind Turbine to obtain the best performance at different wind speeds. The dimensions of this wind turbine have a rotor diameter of 1200 mm, blade length of 600 mm, number of blades 3 pieces, and blade material made of fiberglass. The research method uses different wind speed test parameters. The speed test using a blower is 4 m / s, 5.1 m / s, 6.5 m / s, and 7.5 m/s with the load of the lamp is 10 W, 20 W, 30 W, 40 W, 50 W, and 60 W. Subsequently analyze the characteristics of the wind turbine. The results of testing the wind turbine at a speed of 4 m/s obtained a maximum efficiency of 36.4% at 496.3 rpm turbine rotation. Power generator 15.8 W at a voltage of 20V and current 0.79 A. Keywords: 5-blade HAWT wind turbines, wind speed, system efficiency, generator power, tip speed ratio.

Keywords
Blade turbines; wind speed; efficiency of system; tip speed ratio; turbine power

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/EMRgG9LBHYan

Corresponding Author
Amin Suharjono

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

Abstract
Abstract— Strong wind allows uproot the trees and causes human victims to be injured or dead. Unfortunately, the strong wind comes suddenly to the trees on the street and many people and traffic are around there. It needs wind speed monitoring and strong wind early warning to avoid the victims due to fallen tree. This paper explains the development of wind monitoring and early warning system using wind speed sensor and weather forecasting. The steps involve investigating the wind speed, designing the system, developing the system, testing, and validating. The result shows that the system can measure the wind speed on the spot in real time and trigger the alert to the people around if the strong wind was occurred. On the other hand, it also informs the forecast of wind speed according to weather web services data few hours before. Applying this system will help the government to prevent the victims of fallen tree due to strong wind.

Keywords
Keywords—strong wind; wind sensor; weather forecast; early warning system

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/ApRHdaQ3JNDc