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How Do Firm-s Specific Factors Affect Capital Structure? Empirical Study on 50 Biggest Market Capitalization of the Indonesia Stock Exchange (2013-2018)
Sandra Heliola; Disman; Ikaputera Waspada

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Corresponding Author
Dwi Fitrizal Salim

Institutions
Universitas Pendidikan Indonesia

Abstract
Capital structure decisions are much influenced by firm specific factors, whereby these factors are supported by the existing Capital Structure Theory. This study aimed to look on how firm specific factors supporting the Pecking Order Theory from the 50 Biggest Market Capitalization of the Indonesia Stock Exchange for the period 2013-2018. These specific factors chosen were Tangibility Asset, Market to Book Ratio, Size, Profitability, and Liquidity. The results suggest that tangibility asset, profitability and liquidity were having negative relationship with the leverage, whereas market to book ratio were positively related to the leverage. Size did not appear to be significantly related to leverage. The results of this study supported The Pecking Order Theory. Another finding was an R square of 0.689 showed that specific factors have 68.9% effect on the companys leverage.

Keywords
Pecking Order Theory; Specific Factors of Capital Structure

Topic
Financial Management and Accounting

Link: https://ifory.id/abstract/rUd3WcN7ATMJ


THE STRATEGY OF DIGITAL SERVICE DIFFERENTIATION TO INCREASE SATISFACTION OF RETAIL THIRD PARTY FUNDS CUSTOMERS AT SHARIA BANK
Asep Ghofir Ali; Agus Rahayu; LA Wibowo; M.Adieb Sultan

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Corresponding Author
Asep Ghofir Ali

Institutions
Universitas Pendidikan Indonesia

Abstract
Nowadays, digital technology for banking cannot be ignored and has an important role in achieving business purpose. Digital technology brings up a big potential for product innovation and services which are difficult to control and predict. Therefore, the company needs dynamic tools to support their business by managing new kind of digital innovation process, so that strategy of innovation is necessary in providing services through giving fast response and simplicity solution for customers or prospective ones. Regarding that situation, sharia banking, needs business innovation strategy through digital services differentiation. The main purpose is to increase customers- satisfaction and the no ones as well, especially the customers who become retail third party funds. Meanwhile, the aim of this research is to assess, theoretically and empirically, the quality of relationship between the customers/prospective ones and the bank to analyze their satisfaction level at one of sharia banks in Indonesia towards its digital services.

Keywords
relationship, differentiation, customers- satisfaction, bank

Topic
Strategic Management, Entrepreneurship and Contemporary Issues

Link: https://ifory.id/abstract/wGPqR6KrbJYh


Analysis of Brand Image and Brand Trust in Purchase Decisions of Honda PCX Motorcycle Group Members in Bandung
Prama BR. H. Hendrayati, C.Furqon, H.Mulyadi

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Corresponding Author
S. Sulastri

Institutions
Universitas Pendidikan Indonesia

Abstract
The purpose of this study was to determine the image of brand image, trust, and purchase decisions, the influence of brand image and brand trust on purchase decisions of Honda PCX Motorcycle Group Members in the City of Bandung. The method used is a descriptive verification survey, with a population of 128 and a sample of 96 respondents, with a simple randomize sampling technique. Descriptive analysis uses the average range of categories, while verification uses Partial Least Square (PLS). The conclusion that brand image and brand trust are in the high enough category, while purchase decisions are in the sufficient category. Brand image has a positive and significant effect on purchase decisions, brand trust has a positive and significant effect on purchase decisions. Simultaneously, brand image and brand trust have positive and significant influence on purchase decisions.

Keywords
Brand Image, Brand Trust, Purchase Decision

Topic
Marketing Management

Link: https://ifory.id/abstract/NqyJ739dUrPL


Memorandum of Understanding (MoU) in the Context of Indonesian International Treaty
Evi Deliana

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Corresponding Author
Evi Deliana HZ

Institutions
Universitas Riau

Abstract
Memorandum of Understanding (MoU) is one form of international instrument made by the subjects of international law. In the practice of the states, there are times when the MoU is not legally binding, but other state practices emphasize the principle that any international treaty made by states has binding power to them. This article uses normative legal research, especially research on legal principles. The practice of Indonesia regarding the MoU differs from that in other countries, especially common law countries. Where in the context of Indonesian international treaty, the MoU has a binding power as to which other international agreements are followed by Indonesia.

Keywords
MoU, international agreement, Indonesia

Topic
International Law

Link: https://ifory.id/abstract/D7wJj8MfALVx


BASIC ANALYSIS ON HEAT TRANSFER PHENOMENA IN NATURAL CIRCULATION FOR LIQUID SODIUM
Rindi Wulandari(1); Sidik Permana(2);Suprijadi(3)

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Corresponding Author
Rindi Wulandari

Institutions
Rindi Wulandari(1); Sidik Permana(2); Suprijadi (3)
(1) (2) Nuclear Physics and Biophysics Research Division, Institut Teknologi Bandung
Jl. Ganesha 10, Bandung 40132, Gedung Fisika FMIPA ITB Indonesia
(3) Theoretical High Energy Physics and Instrumentation Division, Institut Teknologi Bandung
Jl. Ganesha 10, Bandung 40132, Gedung Fisika FMIPA ITB Indonesia

1) wulandarindi[at]gmail.com (corresponding author)
2) psidik[at]fi.itb.ac.id
3) supri.haryono[at]gmail.com

Abstract
Natural convetion, the heat transfer on fluid due to density differences that can be caused by differences in fluid temperature. One example application of natural convection is cooling system, such as nuclear reactor cooling system. The purpose of this study is to analysis the basic characteristic heat transfer of sodium liquid in the natural circulation system for steady state analysis and transient characteristic with Finite Element Method. The selected module is the Non-Isothermal FLow (NITF) module. This module is a combination of three basic equations, namely the continuity equation, the Navier-Stokes equation, and the dynamic equation of heat transfer in fluid. The simulation model measures 1.5 x 2 (m) with sodium liquid (Na) as a fluid.

Keywords
heat transfer, natural circulation, Finite Element Method

Topic
Fluid dynamics

Link: https://ifory.id/abstract/fruKAwe7CvbY


Hybrid Power Plant Model: Photovoltaic-Fuel Cell Micro Scale
Yusuf Dewantoro Herlambang; Totok Prasetyo; Anis Roihatin; Yanuar Mahfudz Safarudin; Fatahul Arifin

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Corresponding Author
Yusuf Dewantoro Herlambang

Institutions
Politeknik Negeri Semarang

Abstract
The purpose of this research is to study the performance of hydrogen fuel cell to study different fuel flow rate and different concentration to obtain the optimum performance of the cell. First, design a hydrogen fuel cell model, second simulate cell performance toward hydrogen fuel flow rates of 6, 18, and 30 mL/min and fuel concentrations of 50 mol/m3. Subsequently, we obtained the characteristics of voltage-electric current density and power density-electric current density per stack of fuel cell. The research of this hydrogen fuel cell obtained the power density optimum of 0.0471 mW/cm2 at a cell current density of 0.135 mA/cm2 and a cell voltage of 0.35 V. The greater the load the greater the time used by the battery for instant loads. The average time when the load is small is 10 W with a time of 240 hours and the fastest time when a large load is 400 watts with a time of 6 hours. Decreasing battery discharge time to the same load due to the completion of power losses in each device or circuit that produces the power generated by the battery does not reach the maximum load.

Keywords
photovoltaic; PEM fuel cell; power density; flowrate; concentration

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/nVTE7YwKhHLr


Wind Energy Conversion System With Capacity Of 450 W In Order To Support Teaching And Learning Process In The Laboratory
Yusuf Dewantoro Herlambang; Teguh Harijono Mulud, Bono, Gatot Suwoto, Suwarti

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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


Nutrient Film Technique (NFT) Hydroponic Nutrition Controlling System Using Linear Regression Method
Arif Nursyahid1, Helmy2, Anindya Iffa Karimah3, Thomas Agung Setiawan4

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Corresponding Author
eni wardihani

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

Abstract
Abstract— Nutrient Film Technique (NFT) hydroponic cultivation could be an alternative to overcome the increasing food need. Nutritional needs supply of hydroponic plant are one of parameters that need to be considered. NFT hydroponic nutrient controlling system aims to facilitate farmers to maintain the amount of nutrition according to plant needs. This system uses linear regression method to control the amount of nutrients. The accuracy results obtained from controlling system experiment are 87.84%.

Keywords
Keywords— Nutrient Film Technique, Analog TDS Sensor.

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/CTwMV2RqU3Gb


Fall Detecting Clothes in Realtime Based Seniors Full Body Motion Capture System Using Multiple Inertial Sensors
Tri Raharjo Yudantoro1, Faiz Pramuditya2, Roni Apriantoro3, Siti Jum-atun4

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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


Aplication of CNC Machine Router 3-Axis for Making of Engravired Granite or Marble
Suharto1, Suryanto2, Sarana3, Kunto Purbono4

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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


MAINTENANCE INFORMATION SYSTEM DEVELOPMENT FOR POWERHOUSE DEPARTMENT ON DIESEL ENGINE MANUFACTURER
Anwar Sukito Ardjo1, Eni Dwi Wardihani2, Agus Slamet3, Muhammad Hafiz Habiburrahman4

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Corresponding Author
Liliek Triyono

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

Abstract
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.

Keywords
Keywords : maintenance, diesel, powerhouse, OOD

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/nDBcbW6ZaHVJ


ANDROID BASED MAINTENANCE INFORMATION SYSTEM FOR MACHINING WORKSHOP IN POLYTECHNIC HIGH EDUCATION
Anwar Sukito Ardjo1, Eni Dwi Wardihani2, Prayitno3

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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


PARTICIPATORY RURAL APPRAISAL STRATEGY IN REALIZING THE STANDARDIZATION OF SHIP COMPONENTS
Ampala Khoryanton1, Pratikto2, Sudjito. S2, Purnomo B.Santoso2

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Corresponding Author
Anis Roihatin

Institutions
1 Mechanical Engineering Department, Politeknik Negeri Semarang,
2 Mechanical Engineering Department, Faculty of Engineering, Universitas Brawijaya, Malang, Indonesia

Abstract
ABSTRACT - The role of ships for Indonesia is very important as a trigger for economic development and inter-island liaison. In line with the Indonesian government program in realizing the sea toll program and as the ruler of the world maritime axis, the ship needs will increase rapidly then the shipping industry becomes the main foundation in supporting this program. However, the development of the shipping industry in Indonesia is still hampered because ship components are still largely imported. As many as 70% of ship components must be imported from abroad. While many domestic SMEs of ship components have not been standardized, so they have not been able to support the shipping industry. The purpose of this study is to formulate participatory rural appraisal strategy in realizing the standardization of ship components. The results of the research indicate that there are five main factors influencing the success of product standardization: function and performance of Local Working Group Platform, the involvement of strong certification institutions, availability of technical expert and supporting institutions, shipyard in Evaluation Monitoring. The standardization program undertaken by SMEs of ship component is very important to support the shipping industry in Indonesia.

Keywords
ship, SMEs

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/8KbyvCajF7xg


PREDICTION OF SEDIMENTS DISCHARGE IN WATERSHED WITH TWO TANK MODELS
Tedjo Mulyono¹, Jumi 2, Azizah 3

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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


PERFORMANCE ANALYSIS OF SHAPE, COLOR AND TEXTURE FEATURES ON TRACKING INFORMATION FACE BASED ON CBIR
Jumi1, Achmad Zaenuddin2, Tedjo Mulyono3 1,2Departement of Bussiness Administration, 3Departement of Civil Engineering

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Corresponding Author
Jumi Jumi

Institutions
1,2,3Politeknik Negeri Semarang

Abstract
Abstract - The image has the features of shape, color and texture that are vary. Each feature has adifferent performance in supporting the accuracy of information retrieval using a processapproach to CBIR (Content-Based Image Retrieval). On the image with different objectsdifferent erformance will be generated on each feature. For example that the performancefeatures of the form of the more dominant compared features color and texture on the image with the face, while the object on the image with the object of interest feature is moredominant than the features of texture and shape.In this research was conducted on theanalysis of the performance features of the shape, color and texture in supporting theaccuracy of a search using the approach of CBIR (Content Based Image Retrieval). Themethod used are invariant moment, color moment and GLCM ( Grey Level Co-occurrenceMatrix). The results showed that the best search accuracy is 95%, where the features ofshape has a performance by 50%, 30% color feature and texture feature by 20% with 600test image with object database assets Keywords : Performance, Feature, Retrieval,

Keywords
Keywords : Performance, Feature, Retrieval, Moment, GLCM

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/RjkAwa9FNKqe


A Numerical Model on the Performance of Microfluidic Fuel Cells for the Transport Phenomena
Yusuf D. Herlambang1, , Kurnianingsih2, Anis Roihatin3, Jin C. Shyu4, Shun C. Lee5

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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


Experimental Study Of Transmission Ratio Changing Mechanism for Motorcycle Applications
Bambang Supriyo1, Sugeng Ariyono2, Sihono3, Bambang Sumiyarso4, Bambang Tjahyono5

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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


Analysis of Deep Water Culture (DWC) Hydroponic Nutrient Solution Level Control Systems
Arif Nursyahid1, Thomas Agung Setyawan2, Khalimatus Sa-diyah3, Eni Dwi Wardihani4, Helmy5, Abu Hasan6

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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


VICTIM IDENTIFICATION APPLICATION WITH FACE RECOGNITION BASED ON ANDROID
1 Liliek Triyono, 2 Slamet Handoko, 3 Kemala Yuliana Puspawaty

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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


QoS Analysis of WSN (Wireless Sensor Network) Using Node MCU and Accelerometer Sensors On Bridge Monitoring Systems
Devan Junesco1, Eko Supriyanto2, Abu Hasan3, Muhammad Mukhlisin4

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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


Accelerometer Sensor Data Analysis of Bridge Structural Health Monitoring System
Anindya Ananda Hapsari1, Eko Supriyanto2, Abu Hasan3, Amin Suharjono4

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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


DUBLE SECURITY SYSTEM WITH RFID AND PASSWORD BASED ON ARDUINO MEGA 2560 AND PLC
Syahid1, Sigit Supriyatna2, Yusnan Badruzzaman3, Djodi Antono4, Ari Santoso5

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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


Power Saving of IP over WDM: Coherent Taxonomy, Mechanism and Technique: A review
Legenda Prameswono Pratama1, Safaa Najah Saud2, Eni Dwi Wardihani3, Nordayati Mat Lehat4

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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


KTP Sapi Application (Cattle Technology Card) Android-based with RFID for Livestock Data Collection Management and Temperature, Humidity and Ammonia Gas Controller in Cowshed
Sukamto1, Prayitno2, Halimah Itsna Wardany3

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Corresponding Author
Wimba Zainrona

Institutions
1,2,3Informatics Engineering, 1,2,3Politeknik Negeri Semarang

Abstract
Abstract-- One of the steps to realize self- sufficiency of beef is improvement management of cattle farm that still done conventionally with individual ownership using paper, not using RFID and stored on database. The next problem is that there is no monitoring of the condition of the cage including temperature, humidity and ammonia gas which affects the health and growth of cattle. In addition, the location of the enclosure far makes it difficult to monitor and collect data on cattle when not using a mobile application. The purpose of this research is to make the application of KTP Sapi with the features of cow data management, feeding schedule, livestock report and temperature monitoring, humidity, ammonia gas and temperature controller based on android. The method used is the waterfall method that includes the stages: analysis, design, implementation, testing and maintenance. KTP Sapi application has several features, namely feeding schedule, livestock reports, integrated cow collection with RFID, cage, cage monitoring, cage controller integrated with tools and servers so that applications can be accessed anytime anywhere there is internet access. KTP Sapi application is expected to provide convenience especially for farmers in cattle collection, monitoring and controlling temperature, humidity and ammonia gas. KTP Sapi application has been successfully built and can be downloaded free on Google Playstore.

Keywords
Keyword--android, cow, data collection, livestock, RFID, monitoring, controller, temperature, humidity, ammonia gas, cage, cowshed

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/z7q4TAgMwG3D


Wind Speed Monitoring and Alert System using Sensor and Weather Forecast
Mardiyono1, Rhisma Etika Sari2, Okti Nian Dini3

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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


Emission Comparison of Short Lived Climate Forcers Over Long Term Greenhouse Gases From Domestic and Transport Sector in Semarang City
Haryono Huboyo1 , Budi Samadiku2 , Okto Manullang3

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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


THE EFFECT OF DER, EPS, AND UNDERWRITER REPUTATION ON INITIAL RETURN WITH INTEREST RATE
Lasmanah, Disman, Nugraha

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Corresponding Author
Agus Rahayu

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to analyze the effect of EPS, DER and underwriter reputation on initial returns which is moderated by the interest rate on IPO issuers. Statistical data analysis is logit regression analysis. The results showed that EPS, DER, and underwriter reputation which were moderated by the interest rates had significant influenced on the initial return. On the testing of hypothesis of each variable showed that DER and underwriter reputation influenced on the initial return significantly. On the contrary, EPS and interest rate had an effect on initial returns significantly. The DER and underwriter reputation which are moderated by the interest rate (SB) indicated that the DER*SB and the reputation of the Underwriter*SB had no a significant effect on the initial return,. As for the variable EPS*SB indicated that it had a significant effect on the initial return. This means that the EPS had an effect on the initial return with the interest rate strengthening the relationship between EPS and initial return.

Keywords
IPO, DER, EPS, Underwriter Reputation, Initial Return, Interest Rate

Topic
Financial Management and Accounting

Link: https://ifory.id/abstract/KRzH4cE96eVw


IMPROVING ACCURACY OF NEURAL NETWORK ALGORITHM THROUGH NOISE MINIMATION USING BAGGING FOR MODELLING PREDICTION OF EARLY AGE CONCRETE COMPRESSIVE STRENGTH
Stefanus Santosa, Suroso, Marchus Budi Utomo, Martono, Mawardi

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Corresponding Author
Stefanus Santosa

Institutions
Politeknik Negeri Semarang

Abstract
Artificial Neural Network (ANN) is a Machine Learning (ML) algorithm which learn by itself and organize its thinking to solve problems. Although the learning process involves many hidden layers (Deep Learning) this algorithm still has weaknesses when faced with high noise data. Concrete mixture design data has a high enough noise caused by many unidentified / measurable aspects such as planning, design, manufacture of test specimens, maintenance, testing, diversity of physical and chemical properties, mixed formulas, mixed design errors, environmental conditions, and testing process. Information needs about the compressive strength of early age concrete (under 28 days) are often needed while the construction process is still ongoing. ANN has been tried to predict the compressive strength of concrete, but the results are less than optimal. This study aims to improve the ANN prediction model using Bagging to reduce the influence of noise and overfitting. At the beginning this study based on an ANN multi-layer feed-forward that is trained by stochastic gradient descent using back-propagation. The results show that the number of hidden layers and neurons does not guarantee to reduced error. The Deep Learning paradigm, which is characterized by the depth of learning shown by the number of hidden layers, is not always parallel with the best results. Models with 12 hidden layers and 50 neurons still have higher errors. The best model is achieved by 6 hidden layer and 50 neurons with a RMSE value of 7,418 +/- 1,214. The use of different activation functions also does not significantly affect the performance of the model. Model improvements are carried out using Baging. The best model is obtained by 7 hidden layers and 50 neurons with RMSE 6,140 + / - 0.556. This result proves that Bagging is significant to reduce the Deep Learning error rate for predicting the compressive strength of early age concrete. This Machine Learning model can be used as an alternative / substitute for conventional mix designs, which are environmentally friendly, economical, and accurate. Future work with regard to the concrete industry, this model can be applied to create an intelligent Batching and Mixing Plants.

Keywords
Keywords: deep learning, ANN, bagging, concrete compressive strength

Topic
Electrical Engineering and Computer Science

Link: https://ifory.id/abstract/D7bpt4EmvFfB


INTEGRATION OF CLEANER PRODUCTION AND WASTE WATER TREATMENT ON ORGANIC RUBBISH FOR BIOGAS PRODUCTION USING BIOSAM REACTOR
Suparni Setyowati Rahayu1, Totok Prasetyo1, Purwanto Purwanto2,3

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Corresponding Author
Suparni Setyowati Rahayu

Institutions
1Mechanical Engineering Department, Politeknik Negeri Semarang, Indonesia
2Doctoral Program of Environmental Science, School of Postgraduate Studies, Univesritas Diponegoro, Semarang
3Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang Indonesia

Abstract
Environmental management must be carried out in a sustainable manner and this is made possible when the efforts involved are easy, cheap, and whenever possible profitable. Therefore, environmental pollution prevention measures such as the Cleaner Production approach is well suited to be implemented in the environmental efforts in Organic Rubbish. Cleaner Production approach that is combined with Organic Rubbish will be the best approach for the environmental management of Settlements. This research is aimed to develop a new system that integrates the application of Cleaner Production and Organic Rubbish from Settlements. In this research, the waste from tofu that is turned into biogas as a form of renewable energy using an Biosam reactor, for which the waste mud from the sewage system serves as the inoculums. There are 5 approach for implementation: (1) workshop; (2) supervising; (3) technical meeting; (4) network meeting, and (5) technical application. Implementation of the Cleaner Production scheme that is integrated with Organic RubbishTreatment will reduce the amount of rubbish to be treated in the treatment facilities. This means less cost on the construction and operation of waste water treatment facilities, as inherent limitations with organic rubbish treatment facilities like lack of fund, limited area, and technological issues are already there. Implementation of Cleaner Production prior to organic treatment should be able to reduce pollution figures up to certain levels that limitations in organic rubbish treatment facilities can be covered. Biogas in 12 days HRT in an Biosam reactor contains CH4 (88.46 %) and CO2 (12.66 %). Meanwhile, treatment using conventional a bio-digester results in biogas with 88.46 % CH4 and 12.66 % CO2. Hence, biogas efficiency for the Biosam system is 2.54 times greater than using a conventional digester.

Keywords
integration, clean production, Biosam reactor, organic rubbish

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/Xea7EZpMRcbD


PENGARUH VARIASI PENAMBAHAN LIMBAH PLASTIK JENIS THERMOSETTING TERHADAP LASTON AC-WC DALAM UPAYA PEMANFAATAN LIMBAH
Kusdiyono; Supriyadi; Tedjo Mulyono; Sukoyo

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Corresponding Author
KUSDIYONO KUSDIYONO

Institutions
Politeknik Negeri Semarang

Abstract
At present, plastic is a material that is needed by the community at large, where the impact is also very extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry has implemented a paid plastic bag program in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of "plastic waste", because the policy actually encourages people to buy plastic which, of course, will add a new burden for the community to buy it. Based on the above problems, it is necessary to utilize this plastic waste to be made into road pavement materials such as in the manufacture of Asphal Concrette Wearing Course, by making 5 mixed variations ranging from (2 to 10)% of the weight of the aggregate . This research was initiated through a survey process, material procurement, testing of stacking materials, making test specimens, testing specimens. The results of the research can show that the type of Thermosetting plastic waste has a significant influence on the Asphalt Concrete mixture AC-WC heat mixture, including: Density, Marshall Stability, Flow, VIM, VMA, MQ and the remaining Marshall Stability tend to show an increase, moderate VFA and VIMrefusal Density values tend to show a decrease. Thus the plastic waste from the Thermosetting type can be used as a partial replacement of the aggregate for the Asphalt Concrete mixture AC-WC heat mixture with a plastic waste content is limited to a maximum of 10% and at an optimum asphalt content of 5.55%. Thus this research is expected to be of benefit to the industry and the people of Semarang in relation to the use of plastic waste for road pavement.

Keywords
Plastic Waste, Concrete Asphalt Substitution

Topic
Civil and Environmental Engineering

Link: https://ifory.id/abstract/TQUAk72ehFvc


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