Indonesia Conference Directory

Corresponding Author
Ach. Muhib Zainuri

Institutions
Mechanical Engineering, State Polytechnic of Malang

Abstract
Boiler as one of the main equipment in steam power plant system that has important function as steam generation for rotating turbine. Failure of boiler result in operational cause lowering the power capacity of the steam power plant system on the whole. From the data observation, boiler failure frequencies because of leakage on boiler tubes. To analyze the boiler tube failure accurately, information of temperature operated on the outer surface tube for keeping saturated steam in the evaporator and information of temperature distribution on the furnace wall are needed. The main objective of this study is to investigate several areas in which the failure of furnace water walls boiler exist. A combined analysis of thermal and strength of material has been performed, in order to calculate the temperature and velocity fields inside furnace of the water tube boiler. Due to the geometrical complexity of the model, GAMBIT applications was used to generate a computer-based model. All numerical calculations have been performed using the commercial CFD package FLUENT. The results obtained were numerically verified as well as compared with some field test result.

Keywords
thermal analysis, strength of materials, temperature contour, velocity vectors, overheating, corrosion

Topic
Mechanical Engineering

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

Corresponding Author
ridho hendra yoga perdana

Institutions
State Polytechnic of Malang

Abstract
Along with increasing years, meeting food needs in Indonesia continues to experience improvements. This is because it is not balanced between the rate of population growth and the amount of food production. In order to help increase food production and improve the quality of food, modern technology in agriculture is needed, one of which is a greenhouse. Most greenhouses still use manual watering systems that have not been supported by technology that utilizes an automatic watering system and is accompanied by a monitoring system, temperature and humidity control and greenhouse soil moisture using wireless sensor network communications. By spreading 6 nodes at each point and each node equipped with 3 sensors, it is expected that the greenhouse monitoring and control process will be more thorough. The results of testing the temperature of the greenhouse increased by 23%. This also applies to the value of air humidity experiencing an increase of 4% and soil moisture of 1.20%.

Keywords
observation, greenhouse, wireless sensor networks

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/jmnrTHP9QUd8

Corresponding Author
Yesy Diah Rosita

Institutions
a) Program Studi Teknik Informatika, Fakultas Teknik, Universitas Islam Majapahit.
Jln. Raya Jabon KM 0.7, Mojokerto, 61364
*yesidiahrosita[at]gmail.com
b) Program Studi Teknik Informatika, Fakultas Teknik, Universitas Islam Majapahit.
Jln. Raya Jabon KM 0.7, Mojokerto, 61364

Abstract
Librarians classify the book using Decimal Dewey Classification (DDC) System. It is the system for cataloging and indexing of books that have 3 divisions, a ten, a hundred, and a thousand. Each division reflects the book subject. Mostly, librarians only read the book title by reason of it represents the book contents. Then, they search the index of it in the DDC system. However, the process will need extra time. Efficiently, Optical Character Recognition can assist the librarians to convert the image of the book cover into text-editable for getting the book title. For pre-processing, the text will be changed to lowercase, removed the useless words, and tokenized. Long Short Term Memory (LSTM) Neural Network is almost used for text classification research. Its performance has been accurate until more than 85% in this research. Librarians only scan the book cover using a web camera and obtain the information of the book index.

Keywords
classification; library; lstm; ocr; text

Topic
Information Systems Technology

Link: https://ifory.id/abstract/qZ7xJXLVkF3a

Corresponding Author
YOYOK HERU PRASETYO ISNOMO

Institutions
(a)(b)(c) Telecommunication Program Study, Electrical Department, Malang State Polytechnic

Abstract
The optical fiber sensing system is free from the effects of electromagnetic wave interference and radio frequency interference. It becomes a strong reason why this research takes the topic of temperature sensor design using fiber optics. The temperature difference between the incoming light source at one end of the fiber optic cable and the temperature of the sensor will cause a difference in wavelength between the incoming light source and the light reflected by a sensor or passed by a sensor. The difference in wavelength will be converted into RGB value, then it will be converted into a temperature. The method of designing fiber optic sensors used in this research is experiment, called: - heating the ends of the fiber optic core with analytic splicers so they will obtain the shape of the optical fiber end such as spherical and oval fiber optic ends, -peeling the jacket between two ends of the fiber optics and coating optical fiber with plates. The test results for temperature measurements between 303oK to 545oK show that (1) reflected (a) spherical optical fiber sensor has a 7% error, (b) oval optical fiber sensor has a 7.5% error, and (2) forwarded, has an error 1.296 %.

Keywords
optical fiber temperature sensor; temperature sensor geometry, wavelength convert into temperature units; application of wavelength convert into temperature

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/z4jBRtMeVk2x

Corresponding Author
Mahfud Mahfud

Institutions
Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
* mahfud[at]chem-eng.its.ac.id

Abstract
Microalgae is one of the potential raw materials in the manufacture of third generation biodiesel because of high lipids contents and not require large space for cultivation. In this study, Chlorella sp. chosen because of its high oil content of around 30% of the weight of dry algae. In this process the use of microwave irradiation can accelerate the in situ transesterification reaction by extracting microalgae lipids and simultaneously being converted to Methyl-Esters. The aims of this research is to study biodiesel (methyl ester) making through the Insitu trans-esterification process by studying the effect of acid catalyst concentration, microwave power and reaction time. The experiment was carried out in a 1000 ml flat bottom flask made of pyrex, with the influence of microwave irradiation and using a homogeneous sulfuric acid catalyst (H2SO4). Operating conditions at atmospheric pressure with operatings variables: catalyst concentration, microwave power and reaction time. To minimize the number of runs, the experiment was designed with response surface methodology using Box Behnken Design (3 factors and 2 levels). Oil and metyl ester extraction products were analyzed by GC-MS analysis. The results of the experiment showed that the yield of methyl esters increased with the length of extraction time, and was significantly affected by microwave power and catalyst concentration.

Keywords
Biodiesel, Metyl Ester, microalgae, Chlorella sp., Microwave, in situ transesterification.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/w7bqEcYTHgD2

Corresponding Author
Subandiyah Azis

Institutions
National Institute of Technology Malang, East Java, Indonesia

Abstract
In order to maintain food security in Indonesia it is very necessary to organize the provision of irrigation water. Current surface water discharge conditions have decreased compared to 10 years ago so that there really must be efficient and wise efforts in the provision of irrigation water in paddy fields. Many efforts to increase the productivity of paddy fields and one of them is to optimize paddy fields area and reset cropping patterns in the paddy fields. In the initial stage of this study an analysis of the availability of surface water discharge was then analyzed for irrigation water requirements that could be given to each paddy field in accordance with a predetermined cropping pattern. Then a land area simulation is carried out to obtain the most optimal land area. This simulation is carried out in the conditions of the wet season, the normal season and the dry season. Simulations are carried out with various cropping patterns including rice and secondary crops. Simulation results show that the largest area that produce maximum production in the wet season is 11285 ha, in the normal season is 9436.22 ha and in the dry season is 5944.87 ha.

Keywords
irrigation water, wet season, normal season, dry season.

Topic
Civil Engineering

Link: https://ifory.id/abstract/j2tNbABa8wcd

Corresponding Author
Eka Larasati Amalia

Institutions
Malang state polytechnic

Abstract
Daop 2 Bandung is one of the Indonesian railroad operations areas, under the administration of PT Kereta Api Indonesia (Persero). Daop 2 Bandung is currently experiencing a problem in predicting the number of passenger volumes. It is common for railway transportation services to experience passengers flows that increases or decreases in the volume which in turn causes the service of the PT. KAI becomes less optimum. Therefore, a forecasting information system is needed to forecast the volume of train passengers in the upcoming period. This study applied Double Exponential Smoothing method as a forecasting method. The data used is the number of passenger volume data for two periods, i.e. 2017 and 2018 periods. For forecasting accuracy, PE (Percentage Error) and MAPE (Mean Absolute Percentage Error) were used. The passenger volume forecasting results on the Executive Class category shows 946,824 with an error percentage of 11.9962%, the Business Class category shows 221,188 results with an error percentage of 21.6714%, and the Economy Class category shows 5,144,074 with an error percentage of 10.4366%

Keywords
Forecasting, Passenger, Double Exponential Smoothing

Topic
Information Systems Technology

Link: https://ifory.id/abstract/CNAhqDXmM893

Corresponding Author
Windasari Dwiastuti

Institutions
Politeknik Elektronika Negeri Surabaya
Kampus ITS, Jl. Raya ITS, Keputih, Kec. Sukolilo, Kota SBY, Jawa Timur 60111
*dwiastutiwindasari[at]mb.student.pens.ac.id

Abstract
The growing development of Creative Industries for this time cause the competitiveness between fields in the world of Creative Industries has also increased. In the area of photography, many types of photography can be developed and have an excellent opportunity to grow the potential of the industry in Indonesia, such as Light Art Photography. In the process of using Light Stick for Light Art Photography, it also requires patience and skill in making these light patterns. Therefore a light stick tool was created using time warping, which will form innovative patterns in Light Art Photography. This lightstick uses electronic components such as a microcontroller and other supporting components. A microcontroller uses time warping to set the time for LED Strips on/off to form light patterns. Thus, It makes Light Art Photography easily and faster. This lightstick can issue various light patterns with long exposure technique that most influences in this study are Aperture and Shutterspeed. The best Long Exposure technique setting without a model is the Aperture value of f/22, the average Shutterspeed is 5s, and the ISO-100 value. While the best Long Exposure technique settings with a model are Aperture f/22 value, the Shutterspeed 8s value, and the ISO-360 value.

Keywords
lightstick; Light Art Photography; time warping; long exposure; light pattern

Topic
Vocational Engineering and Technology

Link: https://ifory.id/abstract/yqZYDU6XrwjQ

Corresponding Author
Yuri Ariyanto

Institutions
State Polytechnic Of Malang

Abstract
Virtualization server uses the hypervisor technology in its implementation. Hypervisor is one of the virtualization techniques. Where this technique runs several operating systems together in one host. Cloud computing is a combination of the use of internet-based computer technology. The Open source Proxmox VE (Virtual Environment) is a virtual machine operating system. Where virtual machines are built from the Debian Linux operating system, with the modified RHEL kernel. A firewall is a system designed to prevent attacks on the network. Firewalls can be software or hardware that filters network traffic. Proxmox VE Firewall provides a way to protect network infrastructure. In Proxmox VE firewall allows setting rules for all hosts in a cluster or for virtual machines. In this study, the performance of the firewall from the server virtualization using ProxmoxVE will be examined. This study is intended to determine the performance of the firewall default from Proxmox VE. Firewall testing is done by creating filtering rules in the Proxmox VE cloud server. The results of this study will provide an analysis of the performance of the Proxmox VE firewall that runs on cloud servers.

Keywords
Virtualization, Cloud Computing, ProxmoxVE, Firewall, Iptables

Topic
Information Systems Technology

Link: https://ifory.id/abstract/LPr49X3FGWnN

Corresponding Author
AGUSTINA SLOW DAKIA MANURUNG

Institutions
1) Post-Graduate Student of Infrastructure Engineering Study Program, Applied Master Program, Politeknik Negeri Bandung, Indonesia
2) Civil Engineering Departement, Politeknik Negeri Bandung, Indonesia

Abstract
The performance of the modified asphalt concrete pavement structure is done because of the increasing traffic load that occurs along with population growth. The study is needed to review the pavement structure whether it is still able to withstand the load or not at all. An Evaluation was carried out using Falling Weight Deflectometer (FWD) field data to obtain deflection data. Laboratory testing of UMATTA used modified asphalt mixture using Polyethylene Terephthalate (PET) type plastic bottle waste to obtain the relative strength coefficient value as an application combined with secondary data from average daily traffic data on the roads of the Batas Medan City– Batas Lubuk Pakam City. Structural analysis shows that the entire segment requires an added layer with the thickness that is different due to the segmentation performed. This study to maintain the required service level, namely SCI>1, the pavement must receive periodic maintenance and routine maintenance. elated to using asphalt modification using PET will produce a lower pavement thickness of 11 cm compared to the pavement thickness by the 2017 Pavement Design Manual standard of 16 cm.

Keywords
Maintenance, Falling Weight Deflectometer, Polyethylene Terephthalate, Asphalt concrete

Topic
Civil Engineering

Link: https://ifory.id/abstract/rmA7G4hYvE6R

Corresponding Author
Galih Agung Purwono

Institutions
(a) Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung. Jl.Gegerkalong Hilir Bandung
(b) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung. Jl.Gegerkalong Hilir Bandung
(c) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung. Jl.Gegerkalong Hilir Bandung

Abstract
Ashpalt Concrete is a layer on a pavement structure consisting of hard asphalt mixture and aggregate, mixed anda spread in hot conditions and compressed at a certain temperature. Asphalt concrete as a wear layer, known as the Asphalt Concrete-Wearing Course (AC-WC) with a minimum nominal thickness of 4.0 cm. However, the use of AC-WC layers in the pavement structure is often faced with problems of performance degradation due to the development of various types of damage during the service life one of them is a result of the effect of water. In general, water has a negative effect on road pavement construction. Standing water can be caused by high rainfall, poor drainage systems, high groundwater levels, and water runoff. The method used in this research is laboratory-scale experimental methods. Tests carried out in this research encompasses testing the characteristics of materials and testing the characteristics of three types of water. Furthermore, Marshall testing of asphalt mixture that was immersed in three types of water. The Asphalt Level of Oil used is a variation of 4%, 4.5%,5%, 5.5% ,6% ,6.5 %,7%. The OBC value is determined by using the Arrow Range method of the existing Marshall parameter, obtained by the OBC value of 6.15%. This research aims to look at the performance of the physical and mechanical properties of testing Marshall characteristics on a mixture of asphalt pen 60/70 wear layer (AC-WC) on the duration of water immersion from three different types of water. The specimen was carried out immersion testing from three types of water, namely clean water, brown flood water and black air with 30 minute immersion standards with variations of 1 day, 7 days, 14 days, 21 days and 30 days. The results of the study of the typical properties of the AC-WC layer questioned a decrease in density from the initial conditions to the 30 day of immersion. The results obtained were 0.64% for clean immersion water, 0.61% for brown flood water and 0.70% for black flood water. Whereas for VIM values on each specimen for clean air immersion is 43.24%, brown flood water is 45.04% and black water is 44.11%. From the immersion duration, the VIM value on immersion of the clean water still met the criteria, whereas for brown and black flood water at the immersion 7 days to 30 days it did not meet the required criteria. For VFB values, the duration of immersion for 1 month flooded brown water and black flood water below the value of 65%. For VMA values all of specimens and immersion duration still meet standard the value spesification 15% . For the mechanical stability properties of Marshall the AC-WC layer of all specimens still meet the criteria, but the greatest decrease in value occurs in the black flood water immersion specimens of 32.1% in the 30-day immersion from the initial conditions. For the viscous properties shown on the value of flow obtained. The value of flow on immersion 1 day to 30 days did not entered the required criteria. Whereas

Keywords
AC-WC, Immersion, Marshall, flow, Marshall Quontent, Flood Water

Topic
Civil Engineering

Link: https://ifory.id/abstract/EbPWyMFB6NhJ

Corresponding Author
Khairunnisa Khairunnisa Khairunnisa

Institutions
Politeknik Negeri Banjarmasin

Abstract
Digital electronic devices have specifications using IC as the main component where the signal processing on the circuit board was processed digitally. Signal analog process signals with digital devices through the ADC / DAC (Analog-to-Digital Converter / Digital-to-Analog Converter) procedure. In the ADC mechanism, analog signals through sampling, quantization and coding processes, so its become digital signals in the form of binary code. Then the binary code is input into the DAC. Many techniques and methods can be used by DAC to process digital signals to recover the desired analog signal, one of which is the interpolation technique. In this study, two interpolation methods will be analyzed to determine the performance of the audio signal performance on the DAC mechanism, namely Newton Interpolation and Lagrange Interpolation. Performance of each method is expressed as signal-to-noise ratio (SNR). The research methods that will be carried out include making software, reading audio sound data, process and signal analysis through ADC / DAC procedures, signal processing and analysis with interpolation techniques, and calculating SNR output signals. The results of the analysis are graphical and SNR values. Next, SNR is compared between Newton Interpolation and Lagrange Interpolation techniques.

Keywords
performance, DAC, interpolation, audio signal

Topic
Electronics and Microelectronics Engineering

Link: https://ifory.id/abstract/VnxMgw9ZXGHd

Corresponding Author
Alpin Maulidin

Institutions
a) Student of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email: alpin.maulidin.mtri17[at]polban.ac.id
b) Faculty Staff of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email: mujiman58[at]yahoo.com
c) Faculty Staff of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email: herikasyanto919[at]gmail.com

Abstract
Steel is the main material used as reinforcement in reinforced concrete structures. The number of steel used every year continues to increase, the increase has an effect on the availability of the main raw materials of steel, namely iron ore which is a non renewable resources. Therefore, an alternative steel replacement material is needed. Bamboo is one of an alternative chosen as a substitute for reinforcing steel in reinforced concrete structures. In this research, we will use Petung bamboo strips which are anchored using screw nails as flexural reinforcement in concrete beams. This research aims to analyze the behavior of load and deflection relationships in the flexural capacity of bamboo reinforced concrete beams against steel reinforced concrete beams. There are 6 beams used as specimens, 2 bamboo reinforced concrete beams with 1 cm long screw nails, 2 bamboo reinforcing beams with 2 cm long screw nails, and 2 beam with 12 mm steel reinforcement as control beam. The results of the flexural strength of bamboo reinforced concrete with long screw nails 1 cm and 2 cm beam were 44.32 kN and 46.98 kN or 48.64% and 51.56% compared to steel reinforced concrete beams with flexural strength of 91.10 kN.

Keywords
Bamboo Reinforcement; Concrete Beams; Anchor Screw Nails

Topic
Civil Engineering

Link: https://ifory.id/abstract/UazpvucD6FWe

Corresponding Author
Mimin Fatchiyatur Rohmah

Institutions
1,4 Informatics Engineering Universitas Islam Majapahit
2 Informatics Engineering Udayana,
3 Electronics Engineering,Udayana

Email: 1 miminfr[at]unim.com, 2 ikgdarmaputra[at]unud.ac.id, 3 rukmisari[at]unud.ac.id, 4 ipan.ardianto[at]unim.com

Abstract
An economic indicators regarding information on prices of goods and services paid by consumers are known as the Consumer Price Index (CPI). In this study the researchers predicted the Consumer Price Index for Foodstuffs in Cities and Districts in East Java using the Gaussian-Radial Basis Function Kernel for 2019. As a comparison, Foodstuff Type CPI issued by the Central Statistics Agency and as an input variable taken from the prices of basic commodities in three districts namely Banyuwangi District, Jember District and Sumenep District and five cities namely Kediri City, Madiun City, Malang City, Probolinggo City and Surabaya City from 2016 to 2018. The SVR method aims to find a function as a regression function hyperplane that matches the input data by making the least error possible. Forecasting data using the SVR method, the data is divided into training data and testing data. With the RBF kernel where the function is to produce CPI predictions with the smallest Mean Squared Error (MSE) in the City of Kediri of 0.0067 and the Mean Absolute Percentage Error (MAPE) of 0.0191. The average MSE and MAPE for the three districts and five cities are 0.011275 and the average MAPE is 0.0322125.

Keywords
Consumer Price Index, Support Vector Regression, Mean Absolute Percentage Error, Mean Square Error, Gaussian-Radial Basis Function.

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/JMm4Vp6KfaeC

Corresponding Author
Amalia Eka Rakhmania

Institutions
State Polytechnic of Malang
m.taufik[at]gmail.com

Abstract
Indonesian population has grown rapidly, as shown in Central Statistics Agency report that in 2018, Indonesia-s population reached 265,015,030 million. Along with the increasing number of population, water for daily needs is in high demand. A good monitoring and water management is needed to oversee the water usage efficiently. Currently, local water company still implements postpaid payment system that is time and human resources inefficient. In this study, we proposed the implementation of internet of things (IoT) in designing prepaid water meter card for real time water usage monitoring. The card could also be used to directly purchase water quota online via website. The proposed water meter used air vent valve system combined with the water flow sensor to measure the amount of user-s water usage. Result shows that the proposed system could work properly with the error value of 2.84% measured from the difference between water flow read in conventional water meter with the measured value in our proposed water meter. The purchased quota will be directly deducted based on the amount of measured water usage. These process was done in real time environment and the data will be automatically stored in server. When user is running out of quota, solenoid valve embedded in the proposed water meter system will be automatically closed such that user have no access to water source.

Keywords
Prepaid water meter, water flow, real time

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/2wbA6aqZvB4C

Corresponding Author
Wulan Sri Lestari

Institutions
a) Magister Teknologi Informasi Department, STMIK Mikroskil
Jalan Thamrin 112, Medan 20212, Indonesia
wulan.lestari[at]mikroskil.ac.id

Abstract
Collaborative deep learning is an approach that used to overcome the amount of training data needed in building a better deep learning model. In collaborative deep learning, the central server collects user data and run the deep learning algorithm centrally to get more accurate models. However, centralized training data collection can raise serious of privacy leakage problem and damage to the integrity of training data. In this paper we introduce the privacy preserving collaborative deep learning model using verifiable (k, t, n) multi-secret sharing based on the Elliptic Curve Diffie Helman and SHA3-256 as a hash function. Where all training data will be formed into n shares using a session key generated from the private key and public key Elliptic Curve Diffie helman to protect the privacy and avoid all training data using SHA3-256 for the verification process before sending to server. The test results show the integrity of damaged training data and colluding participants can be verified using the Elliptic Curve Diffie Helman and SHA3-256. Therefore proposed model can protect the privacy and integrity of training data and maintain the accuracy of the deep learning model.

Keywords
Data Privacy; Data Integrity; Collaborative Deep Learning; Verifiable Multi-Secret Sharing

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/FGVLbCJH3dkn

Corresponding Author
Orchidea Rachmaniah

Institutions
Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia

Abstract
Curcuminoids have been successfully extracted from Curcuma zeodaria powder with Natural Deep Eutectic Solvents (NADES) as solvent. Ionic types of NADES such choline chloride-citric acid-water (CCCA-H2O = 1:1:18, mole ratio) and choline chloride-malic acid-water (CCMA-H2O = 1:1:18, mole ratio) gave the highest yield of extracted curcuminoids, ca. 0.270±0.025 and 0.355±0.055 mg/g respectively for CCCA and CCMA. However, the final product of the extracted curcuminoids is mixed in the NADES matrix. Hence, a separation process by means a recrystallization is mandatory. Isopropanol-n-hexane in different variance of volume (1:1, 1:1.5, 1:2, 2:1, and 2.5:1 v/v) are observed as a solvent in the proposed recrystallization process as well as the solubility of either of solely choline chloride or curcuminoids in both isopropanol and n-hexane. Unfortunately, either of CCCA-H2O (1:1:18) or CCMA-H2O (1:1:18) and curcuminoids form a new mixture of NADES with isopropanol. Therefore, all the of polar constituents of NADES, i.e. choline chloride, citric acid/malic acid, and water, should be first removed before recrystallized. Isopropanol-ne-hexane (1:2, v/v) give the highest recovery of curcuminoids ca. 55.56% by recrystallization process. Whereas solid-phase extraction (SPE) C18 resin methods seem suitable for removing the polar constituents of NADES.

Keywords
Enrichment, Curcuminoids, NADES, Recrystallization, Solid Phase Extraction

Topic
Chemical Engineering

Link: https://ifory.id/abstract/ze9mn8yGcAhD

Corresponding Author
ADRIANA ADRIANA

Institutions
Chemical Engeneering, Polytechnic Negeri at Lhokseumawe
Jl. Banda Aceh – Medan Km 280 Buketrata Lhokseumawe, 24301

Abstract
The main objective of this research is to utilize fiber waste from palm empty fruit bunch provided very abundant in Aceh. For that needs to be studied and researched other benefits are more valuable. Among them is a source of raw material to produce nanocrystalline cellulose (NCC), a material in nanometer dimensions which can be used as fillers or reinforcing a matrix in order to provide bionanocomposites. NCC isolated from palm empty bunch fiber through the hydrolysis of sulfuric acid, using a solvent mixture of DMAC/LiCl, were passed on activated dialysis membrane after centrifugated to release it from solvent. NCC will be characterized include aspect ratio, morphology, thermal, structural test, and several other physical parameters. The end product is characterized by means of thermogravimetric analysis (TGA), Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM). From XRD and FTIR analysis showed that the nanocrystalline cellulose formed was nanocellulose I with an average size of 72 nm. DSC and TGA thermal test showed that the glass transition, melting point, and decomposition temperature of NCC were 109.59 o C, 191.28 ° C, 210 oC, respectively.

Keywords
palm empty fruit bunch, hydrolysis, dispersions, nanocrystaline cellulose.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/Z4PnNBq7RfTL

Corresponding Author
Mustika Mentari

Institutions
a,b,c) Departement of Information Technology, Politeknik Negeri Malang
*must.mentari[at]polinema.ac.id

Abstract
Maps are one form of an image that often encountered in various interests. For example, many books on tourist attractions or other information that provide maps as a media of information. However, sometimes people with visual impairments such as presbyopia, hypermetropia, or astigmatism have difficulty reading the map which is usually given in small size, multi orientation (multi-scale and multi-direction). Therefore, this study tries to provide a solution through an application that converts image to text in image conditions that have many orientations and different things are briefly called heterogeneous text. The Optical Character Recognition (OCR) system that was built beginning with taking pictures made through a cellphone camera as the first step in obtaining a digital map file, then enters the preprocessing, text segmentation, feature extraction from each different character, then continues to the classification stage. This OCR system for recognizing text with multiple orientations will help people make digital maps easier to read, especially for people who have presbyopia, hypermetropia, or astigmatism vision problems. The proposed model achieves good average accuracy for classifying the characters in various orientation successfully.

Keywords
Optical Character Recognition, Map, Multi Orientation, heterogeneous text ,k-nearest neighbor

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/4xrtEUj28FGy

Corresponding Author
zakijah irfin

Institutions
1,2,3,4,5) Chemical Engineering Department, Faculty of Industrial Technology, Institut Teknologi Sepuluh Nopember Surabaya, Kampus ITS Keputih, Sukolilo, Surabaya, Indonesia
*Corresponding author:zirfin[at]gmail.com
5,6)Chemical Engineering Departement, State of Polytechnic Malang

Abstract
The objective of this research is to separate the Asbuton asphalt in the agitation tank that is equipped with a heater with three stages, namely premixing, digestion, separation of three phases and analysis of the bitumen content in DEX. The purpose of the premixing stage is to reduce the viscosity of Asbuton by adding DEX up to 60 percent of the total mass of Asbuton and DEX and then mixing it for 30 minutes. The digestion step was carried out by adding a mixture of DEX Asbuton with a wetting agent. The wetting agent is a solution of sodium dodecylbenzene sulfonate surfactant (SDBS) and Na5P3O10. This mixture was stirred at 1500 rpm and the process temperature of 60, 70, 80 C for 30 minutes. The surfactant ratio of SDBS to the total mass mix is 0.125; 0.25; 0.37, 0.5%, and the NTP ratio is 0.125; 0.25; 0.37; 0.5% (% mass). Three-phase separation is done by adding water to form three layers. The top layer, which is a DEX-bitumen solution, weighed its weight and measured its density to know the % recovery of bitumen. It can be concluded that the highest percentage of bitumen recovery is 74.63 at 80ºC of temperature, the SDBS concentration of 0.125 percent and the Na5P3O10 concentration of 0.25 percent. Keywords: Asbuton; % recovery; bitumen; Na3P5O10;DEX

Keywords
Keywords: Asbuton; % recovery; bitumen; Na3P5O10;DEX

Topic
Chemical Engineering

Link: https://ifory.id/abstract/uD2HZBnWAyGY

Corresponding Author
Dadang Syarif Sihabudin Sahid

Institutions
a) Department of Information Technology, Politeknik Caltex Riau
Jl. Umbansari No. 1, Rumbai, Pekanbaru, Riau-Indonesia
*dadang[at]pcr.ac.id
b) Department of Mathematics, Universitas Islam Negeri Sultan Syarif Kasim
Pekanbaru, Riau-Indonesia
c) Department of Electrical Engineering, Politeknik Caltex Riau
Jl. Umbansari No. 1, Rumbai, Pekanbaru, Riau-Indonesia

Abstract
Flow experience as a psychological theory has been implemented in various fields. According the theory, flow is represented as anxiety, boredom, and flow. Considering psychological condition in learning activities can improve student performance. Thus, involving flow in learning particularly in e-learning becomes important. The challenge is how to identify flow state during students interaction with e-learning. In previous study, flow was measured by conducting questionnaire series after a learning process. This is inefficient. Additionally, this is often unnatural, since it cannot capture students learning behaviour. Therefore, this study presented flow experience identification when students interact with e-learning using rough set and machine learning approaches. Rough set is an efficient tool to solve uncertainty, imprecision, and vagueness. While, the fuzzy rule and decision tree, parts of machine learning methods were implemented as a comparison. As the results, the accuracy level of the rough set is 92.92%, fuzzy rule is 91.86% and decision tree is 92.39%. As a conclusion, this study showed that flow experience could be identified with high accuracy. In the context of e-learning, it can be used by e-learning to provide an adaptation. Appropriate adaptation is expected can keep the psychological condition of the students in the flow state.

Keywords
flow experience; rough set; machine learning; e-learning

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/rYhN67QyTH3R

Corresponding Author
Rabiya .

Institutions
1) School of Civil Engineering, The State Polytechnic of Bandung
Gegerkalong Hilir Street, Bandung 40012, Indonesia
yuswandono[at]gmail.com
2) School of Civil Engineering, The State Polytechnic of Bandung
Gegerkalong Hilir Street, Bandung 40012, Indonesia
suyonoagus[at]yahoo.com
3) Master of Applied Science in Faculty of Civil Engineering, The State Polytechnic of Bandung
Gegerkalong Hilir Street, Bandung 40012, Indonesia
rabiya86[at]yahoo.co.id

Abstract
Peat soil is a soil that has strong low shear, high water content, large traction, and low carrying capacity. Many constructions are built on peat soil that has problems that are a big decline over a long time. To find out whats happening, go through consolidation testing. Testing of peat soil consolidation using Rowe Cell. The advantages of this Rowe cell can know the saturation value of the sample soil tested. Besides, it can measure the water pressure of pores at the beginning and end of each phase of consolidation. The research was used in peat soil in Rawa Pening, Semarang. Because of the construction of many buildings built in the area. From the results of the research obtained the value of soil ability (Cc) and the coefficient of speed consolidation (Cv). For the Cc value of peat soil is an average of 0,50 and Cv value of 167,99 cm2 per minute. As for the average cavity of soil pore (e) amounted to 14,81. The value of 14,81 is know the size of the soil cavity and density. This is all to know the parameters and factors that occur at the time of consolidation.

Keywords
Peat Soil; Rowe Cell; Large Decline; Consolidation of Peat Soil

Topic
Civil Engineering

Link: https://ifory.id/abstract/AGy3XcvHCDQL

Corresponding Author
Lukmanul Khakim

Institutions
State Polytechnic of Semarang

Abstract
Data is a collection of information that is incorporated into one and has a very important meaning to the owner, every data owner will surely keep the data very carefully and will be stored in a very secure place, with Some extra strict levels of security. Here will be done research and designing a security access data in the management of shared resources that are cloud-based or the term is cloud computing. In this security, the object to be secured is the user data that functions as access to login to the cloud system with an Advanced Encryption Standard (AES) encryption method with a key length of 256 bits. However, before the data is encrypted with the AES method, the data will be encrypted in advance with the MD5 method, and after that it will be carried out the second encryption with the AES method. In general, the method of securing a login data is only using MD5 encryption, but as technology progresses, securing data, especially login data, must be more layered in terms of its This research to meet data security in the case of encryption of login data.

Keywords
Data, Cloud Computing, Encryption, AES, MD5

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/tcHP2uDjUJKz

Corresponding Author
Arie Rachmad Syulistyo

Institutions
Politeknik Negeri Malang

Abstract
Deaf people are one of those with disabilities who cannot speak and hear. Deaf people using sign language for communication who use sign language with hand gestures, body and convey facial expressions using sign language. One important component in sign language is the alphabetical finger or the manual alphabet needed to complete communication. The alphabet of the finger is done by spelling words on spoken language, by spelling letter by letter using a finger. This method is used to spell the name or mention the word. However, not everyone understands sign language, so tools needed to bridge communication between people who are deaf with normal people. One solution will be offered is to use computer technology as a tool to recognise sign language. The technology is an automatic language translator system that integrates a webcam as a detection device by using the Convolutional Neural Network (CNN) method.

Keywords
sign language, convolutional neural network

Topic
Information Systems Technology

Link: https://ifory.id/abstract/ADgxzYnQJPu6

Corresponding Author
Satworo Adiwidodo

Institutions
Department of Mechanical Engineering, State Polytechnic of Malang, Jl. Soekarno-Hatta No. 9, Malang 65141, Indonesia

Abstract
The conventional Savonious wind turbine has two inverted cylindrical blades that resemble the letter S when viewed axially parallel, it can indeed receive fluid impulses from all horizontal directions and produce a greater drag force than other wind turbines. The weakness of Savonius is the resistance in one blade side. Efforts to improve that has been done is to add a blade that serves to increase the local velocity of fluid flow to resist the resistance which is termed Savonius tandem blade (STB). This research was conducted to further reduce the resistance value of one side STB with the addition of an adjustable deflector. The purpose of this study is to obtain information on changes in the torque of the STB wind turbine on variations in the deflector angle and stream velocity. The research method used is numerical simulation using CFD software. A two-dimensional view of the rotor model using deflector was considered. The deflector angle varies start from 15 degrees with an increase also every 15 degrees until the torque decreased. The CFD simulation show there is a significant increase in torque with the addition of a deflector. Maximum torque is not achieved at one deflector angle value but is also influenced by stream velocity. At higher stream velocity there is a tendency to reach the maximum torque required larger deflector angle. Then at a certain point, the torque will decrease when the deflector angle is enlarged.

Keywords
CFD simulation, wind turbine, adjustable deflector, torque, Savonius tandem blade

Topic
Mechanical Engineering

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

Corresponding Author
Achmad Sutanto

Institutions
a) State Polytechnic of Semarang
Jalan Prof. H. Seodarto, S.H, Tembalang, Semarang, 50275, Indonesia
* achmadsutanto[at]gmail.com
b) State Polytechnic of Semarang
Jalan Prof. H. Seodarto, S.H, Tembalang, Semarang, 50275, Indonesia

Abstract
Wireless Sensor Network (WSN) is currently developing so rapidly. This can encourage the creation of many innovative and implementable products that are very useful in everyday life. One of these products is the utilization of WSN for monitoring the condition of the hen coop, caring and increasing productivity of livestock in the midst of the difficult conditions to control and know the state of the coop manually. In this study, an automated system will be designed to keep the hen coop close to ideal conditions includes the temperature of the cage, air humidity, and the chicks feeding system automatically and periodically. This research was compiled using a combination of several sensors that are arranged in a micro-controller such as the DHT11 sensor as temperature sensing, Load cell sensors as sensing the availability of residual feed and some Servo for action actuators to create the desired hen coop atmosphere. The program is connected through the WSN and using Raspberry as a communication device to the network. The expected results with this system include ease of control of hen coop for owners or workers, maintained poultry health, and maximum yields of livestock products.

Keywords
WSN; Smart farming; Smart hencoop; Livestock

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/QNGYwnMLA4ZE

Corresponding Author
Vivi Nur Wijayaningrum

Institutions
Department of Information Technology, Politeknik Negeri Malang
*vivinurw[at]gmail.com

Abstract
Teaching and learning activities in the classroom require data collection on student attendance. The process of data collection on student attendance during lecture hours at the Information Technology Department, Politeknik Negeri Malang, is the responsibility of the lecturer. The lecturer calls and records students one by one to be written in an attendance form, then the form will be recapitulated to the system by administrative staff. This causes frequent errors in the recapitulation of student attendance. Errors in the recapitulation of data and a large number of attendance data that must be recapitulated will certainly make the process ineffective and inefficient. This study uses a smart card to facilitate the process of identifying students during teaching and learning activities in the classroom. Students use smart cards to record their attendance before and after lecture hours. The smart card will be connected to the card reader using NFC which is also connected to a PC using a USB port. The data used includes lecture schedules, courses, classes, lecturers, and students that are stored in the database. The result of a smart monitoring system is the ability to manage data on the system, as well as recording attendance data.

Keywords
authentication, smart card, student attendance

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/eKt9MPudxNpT

Corresponding Author
Muhamad Rifa-i

Institutions
State Polytechnic of Malang

Abstract
The wind turbine system as a power plant is growing rapidly in line with the electrical energy needs and limitations of fossil energy as a source of electrical energy. Many research has been carried out to develop wind turbine systems and improve system efficiency. Research on wind turbine systems requires wind turbine emulators to simulate the behavior of wind turbines against changes in wind speed. In this paper presents a Design of speed controller based on PI controller for a Wind Turbine Emulator (WTE) using a Variable Speed Drive (VSD). WTE consists of VSD, microcontroller, 3 phase induction motor, Permanent Magnet Synchronous Generator (PMSG) and speed sensor. PMSG speed depends on wind speed. At certain wind speeds, PMSG will rotate at a certain value. Wind turbine emulator will adjust the speed of the induction motor according to a certain wind speed. WTE controls the rotation of a 3 phase induction motor connected to its axis in PMSG. Motor and PMSG rotation speed are measured by rotary encoder sensor as speed sensor. The rotary encoder sensor serves as feedback for WTE. Proportional-integral method is used to control the speed of a 3 phase induction motor through VSD analog input. Based on experiment result, PI controller can adjust speed of induction motor so that PMSG will rotate according to a certain wind speed. Here we observe speed response of WTE to generate voltage of PMSG. WTE controls the speed of induction motor at settling time 9s.

Keywords
Wind Turbine Emulator, Variable Speed Drive, PI Controller

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/fwmA2Qpq6e8v

Corresponding Author
Muhamad Rifai

Institutions
State Polytechnic of Malang

Abstract
The wind turbine system as a power plant is growing rapidly in line with the electrical energy needs and limitations of fossil energy as a source of electrical energy. Many research has been carried out to develop wind turbine systems and improve system efficiency. Research on wind turbine systems requires wind turbine emulators to simulate the behavior of wind turbines against changes in wind speed. In this paper presents a Design of speed controller based on PI controller for a Wind Turbine Emulator (WTE) using a Variable Speed Drive (VSD). WTE consists of VSD, microcontroller, 3 phase induction motor, Permanent Magnet Synchronous Generator (PMSG) and speed sensor. PMSG speed depends on wind speed. At certain wind speeds, PMSG will rotate at a certain value. Wind turbine emulator will adjust the speed of the induction motor according to a certain wind speed. WTE controls the rotation of a 3 phase induction motor connected to its axis in PMSG. Motor and PMSG rotation speed are measured by rotary encoder sensor as speed sensor. The rotary encoder sensor serves as feedback for WTE. Proportional-integral method is used to control the speed of a 3 phase induction motor through VSD analog input. Based on experiment result, PI controller can adjust speed of induction motor so that PMSG will rotate according to a certain wind speed. Here we observe speed response of WTE to generate voltage of PMSG. WTE controls the speed of induction motor at settling time 9s.

Keywords
Wind Turbine Emulator, Variable Speed Drive, PI Controller

Topic
Electronics and Microelectronics Engineering

Link: https://ifory.id/abstract/fqhz9bXWpmYe

Corresponding Author
Denda Dewatama

Institutions
Electronics Department, State Polytechnic of Malang

Abstract
Tofu is one of Indonesias special foods made from fermented soybean juice. There are several processes in making tofu. One of them is the process of filtering the juice with soybean waste. The filtering process will determine the quality and quantity of tofu. The better filtering process, the more juice are produced. The purpose of this study is to improve the results of the soybean pulp filtering process. One way is to use an induction motor for a spinner filter machine with adjustable speed. To set the speed is using VSD as a motor driver. VSD output is a frequency that can be used to regulate the speed of the induction motor. Determination of motor speed is using the PI Ziegler-Nichols oscillation tuning method so that a stable motor rotation speed in 700rpm with number of Kp = 0.0108 and Ki = 0.083. Under research conditions 1 liter of soybean pulp can be needed for a spinner time of 27 seconds.

Keywords
Spinner, Soybean Pulp, PI Control, Induction Motor, VSD

Topic
Electronics and Microelectronics Engineering

Link: https://ifory.id/abstract/M7K6BdGDg9YP