Indonesia Conference Directory

Corresponding Author
Yohandri Bow

Institutions
a)Chemical Engineering Department, Politeknik Negeri Sriwijaya, Politeknik Negeri Sriwijaya, Jalan Srijaya Negara Bukit Besar Palembang, 30139
*yohandribow[at]polsri.ac.id
b)Electrical Engineering Department, Politeknik Negeri Sriwijaya, Politeknik Negeri Sriwijaya, Jalan Srijaya Negara Bukit Besar Palembang, 30139
c)Electrical Engineering Department, Politeknik Negeri Malang, Jl. Soekarno Hatta No.9, Jatimulyo, Kec. Lowokwaru, Kota Malang, Jawa Timur, 65141.

Abstract
Dried Tekwan is a processed fish and tapioca flour food product originating from South Sumatra. The conventional method in drying Tekwan is by letting it dried in under the open sun. However, the method of drying with an open sun produces a low-quality product and results in not-uniform dryness. Moreover, the traditional drying process takes a long time to get the desired dry product. To overcome this problem, a dryer is designed with a combination of photovoltaic and thermal backup units complete with the tilt angle control of raw materials. The utilization of solar energy in drying this traditional product called prototype photovoltaic dryer can reduce the drying time and uniform the rate of dryness. Tekwan is considered as a research object of tool performance based on energy analysis and air exergy in Tekwan drying. The fixed parameters are the amount and mass of raw material, and drying temperature, and the changing parameter is the drying time. Observations and calculations were conduction to obtain the best performance found in the variation of 4 hours of drying with the thermal efficiency of 84.48%, exergy efficiency of 77.61%, and exergy of 0.520 kJ / kmol. The drying process is also greatly influenced by environmental conditions such as the amount of irradiation intensity, temperature, humidity, and ambient air velocity.

Keywords
exergy, photovoltaic, solar panel, solar energy dryer.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/37RhtBbnmeWu

Corresponding Author
Suyanta Suyanta

Institutions
POLITECHNIC STATE OF MALANG

Abstract
Renewable energy sources as a future energy source must be developed in response to the problem of scarcity of fossil energy which will eventually run out. The study of science and technology as a solution, by utilizing the potential of all natural resources around us. Liquid substances, especially water, have properties that are always flat surface, can be used if you have a height difference, which is often called a potential difference, can be formed into a potential style by applying existing knowledge and technology. As applied by several researchers: Microhydro must have a minimum of falling water - Dam, requires high costs and water source plant governance is maintained - Minimum wind speed wind speed, must be fulfilled - Solar power plants, constrained by weather All of that still utilizes the natural potential that can be influenced by climate, environmental damage, because it occurs due to natural processes. By utilizing artificial potential differences we can utilize liquid fluid properties to be used as renewable energy sources. Through the construction of mechanical levers that can move energy can be generated. That since ancient times this simple plane has been applied a lot, but it is still on a balance (static) level. Based on this concept it can be developed that the support reaction has multiples of the weight and leverage force. Through this rule we develop it into a lever-based energy. A mechanic, which can produce a reaction force and can move at a certain speed to produce energy. So that it produces multiples of the reaction force from the water potential force due to its own weight.

Keywords
Renewable energy, based, levers, without flow

Topic
Mechanical Engineering

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

Corresponding Author
Rona Ariyansyah

Institutions
a) Department Civil Engineering, State Polytechnic of Bandung
Jl. Gegerkalong Hilir, Ciwaruga, Bandung 40012, Indonesia
*ronaariyansyah99[at]yahoo.co.id
b) Department Civil Engineering, State Polytechnic of Bandung
Jl. Gegerkalong Hilir, Ciwaruga, Bandung 40012, Indonesia

Abstract
Well-designed building structure sometimes suffers from of problems after being built. Structural problems in a building often relate to damages and failures. Several methods can be used to enhance the capacity of building structure including reinforcement and refinement. Reinforcement and refinement can be performed by adding more concrete layer, using steel plate, external pre-stressing and using FRP. FRP is an alternative reinforcement material. Concrete reinforcement using FRP is vulnerable to debonding problem which makes it less optimal. To address this issue, this experimental research was carried out in which reinforced concrete beam was strengthened using FRP by adding FRP anchors to prevent debonding failures. Laboratory experiments were conducted to examine the problem using scientific procedures to find actual solutions. In this research, a test object in the form of 150 mm x 200 mm x 3200 mm concrete beam with third point load was used. Different gaps of anchors of 0.000 mm, 12000 mm, 800 mm, 400 mm and 200 mm were the research variable. This research showed that the use of anchors successfully prevented debonding problems in CFRP reinforcement. The use of 3 CFRP at a distance of 1200 mm appeared as the most effective reinforcement method.

Keywords
Building Structure, Carbon Fiber Reinforced Polymer, Reinforcement, CFRP Anchor

Topic
Civil Engineering

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

Corresponding Author
Lentien Febrianty Ludhyrani

Institutions
a) Department of Civil Engineering Bandung State Polytechnic, Indonesia
Jalan Gegerkalong Hilir, Bandung 40012, Indonesia
lentienfebrianty[at]gmail.com
b) Department of Civil Engineering Bandung State Polytechnic, Indonesia
Jalan Gegerkalong Hilir, Bandung 40012, Indonesia
sxs142[at]yahoo.co.uk
c) Department of Civil Engineering Bandung State Polytechnic, Indonesia
Jalan Gegerkalong Hilir, Bandung 40012, Indonesia
retnoutami[at]polban.ac.id

Abstract
Flexible pavement structural evaluation using AASHTO 1993 method carried out based on deflection values from the survey using the Falling Weight Deflectometer (FWD) which will be used to calculate the Effective Structural Number (SNeff), Structural Number in Future (SNf) and overlay thickness. Flexible pavement is susceptible to rutting damage and permanent deformation. To increase rutting damage and permanent deformation resistance, Asphalt Concrete Wearing Course (ACWC) was being modified by adding SIR 20 material. In determining overlay thickness using AASHTO 1993 method, one of the factors influencing the thickness was properties of ACWC material. In this paper, a case study is carried out on the Raya Dawuan – Cikampek Road. The result of this case study were ACWC-Modified overlay thickness was thinner than ACWC-Normal. ACWC Modified pavement overlay structure thickness obtained at 80 mm meanwhile in ACWC-Normal was 100 mm.

Keywords
Flexible Pavement, SIR 20, Overlay Thickness.

Topic
Civil Engineering

Link: https://ifory.id/abstract/9LeCafucwqkR

Corresponding Author
MUHAMMAD BISRI MUSTHAFA

Institutions
State Polytechnic of Malang

Abstract
BAN-PT is an Indonesian body with the main task to assess the quality of Indonesian university. The assessment result is called accreditation, which has 5 years of validation time. In order to monitor the quality, University has an internal mechanism which is called an internal quality assurance system (SPMI in Indonesian). Usually, SPMI assesses the quality periodically, one or two times each year. This process needs much effort, i.e. time, manpower, and financial cost. Sometimes, internal auditor of the university does not have sufficient knowledge, as much as BAN-PT accessor. This condition causes a lack of assessment accuracy, then causes the quality of SPMI itself. In the other hand, University has abundant of condition data, saved in PDDIKTI database. This paper proposes to exploit the availability of data in this case. Therefore university able to monitor the quality by machine learning process periodically without much effort as manual SPMI process. Furthermore, this paper evaluates two machine learning methods, i.e. naive Bayes and KNN. This proposal exploits several data: student, academic, admission, and alumna. KNN and naive Bayes work in registrant and capacity ratio, student registration ratio, average student GPA in late five years, and on-time graduation scale. The experiment results show the accuracy of naive Bayes and KNN are 78.57% and 57.14% respectively.

Keywords
SPMI; PDDIKTI; KNN; naive Bayes

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/F3vRKmZbt4aX

Corresponding Author
Ridha Amalia Idhar

Institutions
a) Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok 16426, Indonesia
*ridhaamalia.i[at]gmail.com

Abstract
In order to obtain the material properties of reinforcing steel rebar (rebar), tensile test must be performed in the laboratory. Some standards, such as SNI and ASTM, standardize condition of the sample and the loading rate of tensile test. ASTM E8M regulates the loading application (1.15-11.5 MPa/s) of steel rebar test under tension to determine yield properties and SNI 07-2529-1991 regulates 10 MPa/s as the maximum loading rate. These circumstances affect the duration of tensile test in real condition, which may lead to one hour of tensile test. In this article, effect of loading rate of pre-conditioned steel bars (by reducing the section, grinding, and/or lathe according to SNI 07-2529-1991) is investigated using deformed bars (BJTS 40, certified by industries). Random sample of steel reinforcement bars are tested under three different loading rate application. The result of material properties of the rebar, such as stress-strain curve, yield strength, and ultimate strength, are discussed and analysed in this study. Different speed test resulting in different stress rate before yield. However, the stress-strain responses of specimens in the range of linear elastic material are similar. Moreover, at the post yield (plastic) region, the loading rate significantly affected the ductility of the material.

Keywords
Tensile test; Reinforcing steel bar; Loading rate; Yield and ultimate strength; Cup and cone fracture

Topic
Civil Engineering

Link: https://ifory.id/abstract/rFdeBuGx84MV

Corresponding Author
Supriyono Supriyono

Institutions
(a)Informatics Engineering Department
Faculty of Science and Technology Universitas Islam Negeri (UIN) Maulana Malik Ibrahim Malang
(b,c)Faculty of Tarbiyah and Teaching Training Universitas Islam Negeri (UIN) Maulana Malik IbrahimMalang
(d)Psicology Department
Faculty of Psicology Universitas Islam Negeri (UIN) Maulana Malik IbrahimMalang

Abstract
Software development On Expert Systems For Core Competency Detection and PAI Student Learning Achievement is a very important thing to do the evaluation in the section of usability. ISO 9126 is a standard software quality assurance measures. The basic idea is to define and evaluate the product software to know the internal quality and external quality. The characteristic used in this research is using the approach of usability methods. The usability of the software that is produced by the examination in detail is then obtained quite good results. The results obtained indicate the usability level in the software evaluation reached 95%. Software development On Expert Systems For Core Competency Detection and PAI Student Learning Achievement is a very important thing to do the evaluation in the section of usability. ISO 9126 is a standard software quality assurance measures. The basic idea is to define and evaluate the product software to know the internal quality and external quality. The characteristic used in this research is using the approach of usability methods. The usability of the software that is produced by the examination in detail is then obtained quite good results. The results obtained indicate the usability level in the software evaluation reached 95%.

Keywords
Software developmen;ISO 9126;Usability

Topic
Information Systems Technology

Link: https://ifory.id/abstract/YZDF6jHB3K9A

Corresponding Author
AGUSTINA SLOW DAKIA MANURUNG

Institutions
1)Civil Engineering Department, Politeknik Negeri Bandung, Bandung, Indonesia
husnulmarza[at]yahoo.com
2)Civil Engineering Department, Politeknik Negeri Bandung, Bandung, Indonesia
3)Post-Graduate Student of Infrastructure Engineering Study Program, Applied Master Program, Politeknik Negeri Bandung, Bandung, Indonesia
manurungagustina99[at]yahoo.com

Abstract
Optimizing bottled plastic waste of Polyethylene Terephthalate (PET) as added material into asphalt and testing of modified plastic waste bottles for further use as an asphalt mixture. Besides, the Indonesian state is ranked second in the world for producing plastic waste into the sea so that the utilization of waste must be done while reducing the increasing amount of waste. Also, the addition of plastic bottle waste to obtain the durability of the pavement structure in a strong case prevents deformation in the traffic load. This study uses the wet process method as an added material into the asphalt. This research was carried out on a mixture of Asphalt Concrete Wearing Course using a 60/70 pen asphalt modified with PET type plastic waste with levels of 0%, 3%, 6%, 9%, and 12%. The purpose of this study was also to determine the Marshall parameters of the characteristics of asphalt concrete with different modified PET asphalt variations. After analysis, the optimum level of optimum use of concrete asphalt mixture is 9% PET with an increase in 33% stability of Marshall value between the use of optimum modified asphalt with 60/70 pen bitumen used. Marshall stability value is resistance to deformation of the pavement structure.

Keywords
Plastic bottle waste, Polyethylene Terephthalate (PET), modified bitumen, AC-WC characteristics

Topic
Civil Engineering

Link: https://ifory.id/abstract/YvDRy2LbzPda

Corresponding Author
Rabiya .

Institutions
1) 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
2) School of Civil Engineering, The State Polytechnic of Bandung
Gegerkalong Hilir Street, Bandung 40012, Indonesia
3) School of Civil Engineering, The State Polytechnic of Bandung
Gegerkalong Hilir Street, Bandung 40012, Indonesia

Abstract
Problems arise when building infrastructure on peat soil, such as on a declining bridge. To know this, an experimental test was conducted. From experimental testing, the PT-00 model had the biggest drop at 87,16 mm, for the PT-25V model was 65,30 mm and the PT-KKK-25V model amounted to 67,23 mm. For the model of PT-00 experienced a faster decline and small load is 37 kg, model PT-25V can withstand the load up to 49 kg, while for the model PT-KK-25V, the pile foundation can afford the load up to 204 kg. The peat soil with pile foundation undergoes the fastest depreciation of 52,25 mm on the PT-KKK-25V model. For PT-00 and PT-25V models subjected to a smaller depreciation process of 38,8 mm and 28,78 mm The results of this analysis can be concluded that for the test pile foundation press, the application of improvement is more effective on the model PT-KKK-25V, namely pile foundation model is mixed 8% optimum contain of lime shells and electrokinetic with a voltage of 25 V. But for pile foundation tensile testing, the application of modeling is more effective on the PT-25V model. Because electrokinetic can enlarge the tensile force of the pile foundation.

Keywords
Peat Soil, Lime Shells, Electrokinetic Method, Pile Foundation, Settlement of Soil

Topic
Civil Engineering

Link: https://ifory.id/abstract/fkFvKBZbT29a

Corresponding Author
Athaya Zhafirah

Institutions
a) Department of Civil Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung 40559, Indonesia
*athaya.zhafirah.mtri15[at]polban.ac.id

Abstract
The low permeability of soft soils results in slow water flows from the consolidation and the low bearing capacity. The soil improvement that can be is by using Prefabricated Vertical Drain (PVD). The use of PVD significantly reduces the length of the soil pore drainage pathway, so that it can increase the bearing capacity of the soil due to the compaction process from the release of pore water from the soil. Experimental testing in the laboratory was carried out using a steel box measuring 1000 mm x 1000 mm x 1000 mm. There are three samples, soil without PVD and soil with PVD triangular patterns of distances of 100 mm and 150 mm. Preloading is carried out before loading on the concrete plate. Concrete plates measuring 700 mm x 100 mm x 30 mm and load media are proving rings with a capacity of 10 kN. The load placed in the center, the end, and the edge of the plate. The loading test results on a concrete plate on soil with PVD can reduce deflection that occurs compared to soil without PVD. Deflection reduction is more effective for PVD with a distance of 100 mm.

Keywords
Soft soil; Prefabricated vertical drain; Concrete plate; Deflection; Experimental

Topic
Civil Engineering

Link: https://ifory.id/abstract/n4X38AbuP6aH

Corresponding Author
Zuhdi Ma-sum

Institutions
Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Sepuluh Nopember

Abstract
Lemongrass (Cymbopogon nardus), a traditional medicinal plant in Indonesia, has been considered to have a therapeutic effect and is widely used in the perfume and pharmacological industries. Considering the ability of Lemongrass Oils, this study was conducted to optimize the microwave-assisted hydrodistillation method (MAHD) for Cymbopogon nardus leaf samples to improve the yield and analysis of components of essential oils. Result optimization is done through Box-Behnken Design (BBD) from the surface response methodology (RSM) using three variable factors (extraction time, irradiation power, mass sample, and sample size). Based on RSM results, the maximum essential oil yield is obtained by 800 W microwave power, mass sample 20 g, sample size 1.5 cm at 90 minutes. The results showed that MAHD from 20 g Lemongrass, produced the highest volatile oil yield (2.26%) compared to 40 g mass essential oil (1.94%). Essential oils extracted by MAHD were analyzed by mass gas-spectroscopy (GC-MS) chromatography and showed the main constituents of them were Geranial, Z-Citral, beta-Myrcene, and Eugenol. This study reveals that MAHD can be an effective method for hydrodistillation of essential oils in Cymbopogon nardus in terms of shortening the time of hydrodistillation, reducing the optimum energy consumption and process.

Keywords
Microwave extraction; Cymbopogon nardus; Respon Surface; Optimization.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/q2bfcxrApkDX

Corresponding Author
Orchidea Rachmaniah

Institutions
1 Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia
2 Halal Centre, Research-Based Community Development Program (Lembaga Penelitian dan Pengabdian Masyarakat/LPPM), Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia
3 Department of Chemical, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia
4 Department of Chemical Industrial Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia
5 Laboratory of Technology Medic, Polithecnic of Health, Pucang Jajar Tengah 56, Surabaya 60282, Indonesia

Abstract
High number of students of Institut Teknologi Sepuluh Nopember (ITS) of Surabaya, ca. 18,698 of registered college students in 2018/2019 academic year, make it as a potential consumers especially in food industry. The condition is also supported with two polytechnics i.e. Politeknik Elektro Negeri Surabaya (PENS) and Politeknik Perkapalan Negeri Surabaya (PPNS). Both of the polytechnics have ca. 3,855 and 2,479 respectively for PENS and PPNS. Most of them purchased food or beverages from on-campus food service, canteens. However during the Ramadhan festival, most of the canteen is closed. Therefore, many seasonal food stalls were present at “Bundaran ITS” starting at 15.00 till 20.00 WIB (West Indonesian Time Area), provided food or beverages for breaking the fast. Unfortunately, most of them is a healthy foods. Therefore, survey were conducted to check the healthiness of the food, meaning the food colorant additive especially red colorants. Moreover, this study also examined relationships among healthy food awareness, behavioural intention toward healthy foods, and actual behaviour of the ITS consumers. They were 37 samples were collected during two periods of survey, at 9-12 May 2019 and 28-29 May 2019. The collected samples were focused that samples which might had red colorant. The collected samples were classified into three categories: beverages (32.43%), ketchups (54.05%), and snacks (13.51%). Mostly, all sample contained both amaranth and rhodamine B, illegal red colorants. Only two samples of ketchup (from 20 samples) were absent in both amaranth and rhodamine B. All of the samples contain red allure, erythrosine, and ponceau 4R, legal red colorants. Though, they were legal, some were beyond the maximum allowable value, ca. >300 mg/g.

Keywords
Food Additives, Food awarness, Healthy Food, Red Colorants, Rhodhamine

Topic
Environmental Science and Engineering

Link: https://ifory.id/abstract/fpmUdLy9ngZY

Corresponding Author
Eka Larasati Amalia

Institutions
Malang State Polytechnic

Abstract
Forecasting the number of new student enrollments at Politeknik Negeri Malang offers the campus a good help to discover new innovations and good marketing strategies. Besides, it can be used as a reference in planning the teaching and learning process. This study used the Single Exponential Smoothing method as a forecasting method. Forecasting accuracy uses Mean Absolute Deviation (MAD), Mean Square Error (MSE), and Mean Absolute Percentage Error (MAPE). Based on the calculation results, the smoothing constant result is α = 0.9 which means it has the smallest error values for the three forecasting accuracy calculation methods.

Keywords
forecasting, registration, students, single exponential smoothing

Topic
Information Systems Technology

Link: https://ifory.id/abstract/ZQanPTpKHg8D

Corresponding Author
luki ardiantoro

Institutions
Universitas Islam Majapahit, Mojokerto

Abstract
FP-Growth algorithm is widely used to analyze pattern from huge amount of data with (frequent) repeated items. Objective of this research is to analyze playing pattern a badminton player, one of a popular sport in Indonesia. Data set is generated from technical stroke during the game. The model used in this study was Jonathan Christie a top Indonesian badminton player. The method of data collection is done by dividing the playing field in various areas of the game, because each stroke is suitable to be done in a particular area. Observations are made by using the software, to calculate and classify the types of stroke that carried out by athlete. Result of this research; tactical approach for Jonathan Christie during this match was described. The data obtained will be very useful for the coach to improve the athletes performance. Another advantage obtained is the analysis of athletes performance can be done with a quantitative approach, so that it can enrich the current methods. The conclusion, FP-Growth is able to describe the game pattern of a badminton athlete.

Keywords
FP-Growth, badminton, game pattern.

Topic
Computer Science and Engineering

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

Corresponding Author
Sutiah Sutiah

Institutions
(a,c)Faculty of Tarbiyah and Teaching Training Universitas Islam Negeri (UIN) Maulana Malik IbrahimMalang
(b)Informatics Engineering Department
Faculty of Science and Technology Universitas Islam Negeri (UIN) Maulana Malik Ibrahim Malang
(d)Psicology Department
Faculty of Psicology Universitas Islam Negeri (UIN) Maulana Malik IbrahimMalang

Abstract
The research aims to assess the development and implementation of Fuzzy Topsis optimization on core competency detection expert systems and student learning achievement majoring in Islamic religious education at PTKIN. In the learning process of KKNI based curriculum designed to detect the level of development of core competencies and achievements study students at the faculty or PAI study Program at PTKIN. The main product development of this research is expert system application With the Fuzzy Topsis method of measuring the indicator Development of Core Competencies (Hard skills and soft skills) and Learning factors that have an effect on student learning achievements. The results of this expert system can help students and lecturers Independently to detect how the level of development students core complications, detecting internal learning factors and external influences and measures how they influence to student learning achievements. Optimizing Results of Fuzzy TOPSIS shows optimal results with an accuracy rate of 92%.

Keywords
Fuzzy Topsis; Optimization; Indicator Development

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/HrA6yMkCLBxd

Corresponding Author
Annisa Fitranti

Institutions
a) Department of Electrical Engineering, Universitas Negeri Malang, Jalan Semarang No 5, Malang 65145, Indonesia
*wahyu.nur.ft[at]um.ac.id

Abstract
Basic Programming is a productive subject in the study of ICT Vocational High School programs that require students to develop information systems in accordance with the times. Lack of applicative material in basic programming subjects is a problem that is often encountered so that the level of critical thinking of students is less than optimal. In addition, the level of student interest in these subjects is less than optimal because of the monotonous implementation of learning. The solutions offered through this study aim to produce gamification-based mobile applications as innovative and communicative learning media. The development method used is the ADDIE model (Analyze, Design, Development, Implementation, and Evaluation). The result shows the total usability level is in 81.75%. Material validation shows the results in 95.83% and validation from media experts is 97.12%. Test results on the small group trial subjects shows 91% valid and the large group 93% valid. Based on the results of product usability testing and field trials, it can be concluded that the product is suitable for use as a medium in the learning process. Concept of gamification in this media also increases the attractiveness and motivation of users in order to obtain maximum testing results.

Keywords
Development; Gamification; Basic programming; Mobile application;

Topic
Vocational Engineering and Technology

Link: https://ifory.id/abstract/8VtF36hRdyMc

Corresponding Author
Amalia Amalia

Institutions
a) Information Technology Department, State Polytechnic of Malang
b) Electrical Engineering Department, State Polytechnic of Malang
Jl. Soekarno Hatta No. 9 Malang 65141, Indonesia
*amalia[at]polinema.ac.id

Abstract
In recent years, the number of coffee shops has grown rapidly in an educational city. Malang as one of the educational cities has numerous coffee shops whose locations spread in various places. This condition makes the consumers having trouble to find the place that meets with their needs of the price and comfort level. In this works, the Geographical Information System of Coffee Shop Business Classification in Malang based on criteria is proposed. This system can classify coffee shop data according to the consumer desires using the Naive Bayes method. Users simply provide a choice of price criteria and desired level of comfort on this website-based system. The classification results are used to make it easier for users to obtain information, both the map of locations and the route to reach the coffee shops that meet the criteria expected by the user. Based on the testing that has been done 100% of users stated that they could find a coffee shop according to the desired criteria and 85% of users stated that the information and location of the coffee shop they got were very useful. As a result, the system promises as the application in determining the selection of coffee shops corresponds to the consumer criteria.

Keywords
Geographic Information Sistem (GIS); Naive Bayes; Criteria; Coffee Shop; Malang

Topic
Information Systems Technology

Link: https://ifory.id/abstract/C8NFc6heyWBP

Corresponding Author
Luchis Rubianto

Institutions
State Polytechic of Malang

Abstract
Recently, awareness on application of renewable fuel leads to creation of biofuels . One of them is biodiesel that can be made by transesterification of vegetable oil. In order to prevent conflict of interest, vegetable oil was replaced by waste frying oil. Transesterification produces two materials, biodiesel as main product and glycerol as by product. By this method, glycerol produced was dark and viscous therefore cannot be used for foods nor cosmetics additive. Nevertheless, with its high amount of energy, glycerol ca be used as biofuel. Glycerol was mixed with methanol up to 10% by volume and applied on external combustion engine. The results show that by providing excess of air, glycerol produces acceptable flame for boiler burner

Keywords
waste frying oil, glycerol, biodiesel, transesterification, combustion

Topic
Environmental Science and Engineering

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

Corresponding Author
Dwi Ratnaningsih

Institutions
Civil Engeering, State Polytechnic of Malang

Abstract
The increasing number of students, lecturers and staff brings consequences for Malang State Polytechnic to improve facilities and infrastructure. The consequences of development will have an impact on reducing green open space. The use of green open space must be adjusted as an educational support tool. The purpose of this study is to identify green open space in the State Polytechnic of Malang campus. Data needed for this research are secondary data and primary data. Data collection was conducted in July 2019. Based on the results of the study obtained several locations that have the potential to be optimized for utilization through the additional function of green open space as public space and open learning in Malang State Polytechnic campus.

Keywords
Polinema campus, green open space, green campus

Topic
Civil Engineering

Link: https://ifory.id/abstract/FCVenr3KMdkw

Corresponding Author
Dwina Moentamaria

Institutions
Chemical Engineering, State Polytechnic of Malang

Abstract
Bioflavor is an ingredient produced from the esterification reaction including free fatty acids and citronellol. Free fatty acids (lauric C12) can be obtained from the hydrolysis of coconut oil substrate. Both of these reactions use heterogeneous polyurethane foam (PUF) matrix catalysts which immobilize the lipase enzyme. PUF is used as an immobilized matrix, because it has characteristics as open cell, rigid, high porosity, consists of of the ether-, carbamate-, amide- groups , so it has the ability to absorb water-oil. PUF has been modified its surface structure by co-immobilized lipase coating technique to make it more hydrophobic / oleofilic. Co immobilized consists of a mixture of gelatine, lechitin, MgCl2. In this study, the PUF: co-immobilized ratio used is 1:10; 1:15; 1; 20; 1: 25; 1:30 (b / b) for the hydrolysis reaction. Characteristics of surface modification of PUF can be analyzed by SEM. The results of hydrolysis fatty acids are further reacted with citronellol with heterogeneous biocatalyst with a molar ratio of 1: 0.8; 1: 1; 1: 1,2; 1: 1,4; 1: 1,6. The modification results show a longer stability and can be reused, when compared to the free lipase. The resulting bioflavor had the highest citronellol conversion of 52,2%. Organoleptic test perceives the aroma of bioflavor to be softer than the strong aroma of citronellol.

Keywords
heterogeneus biocatalyst, polyurethane foam, coating, immobilized lipase, bioflavor

Topic
Chemical Engineering

Link: https://ifory.id/abstract/p6hwrYBgT7ca

Corresponding Author
Kholid Fathoni

Institutions
Politeknik Elektronika Negeri Surabaya

Abstract
Sunan Ampel is a religious figure and one of the legendary members of Walisongo in Surabaya even on Java. The history of Sunan Ampel is rarely known by the public or even very little information is known about him. This is because the existing references are still limited, difficult to obtain and not interactive. Therefore we need media that can describe the history of Sunan Ampel interactively and not based on textbooks. This can be overcome by developing game-based Sunan Ampel historical applications. This game is built with two-dimensional characters and the genre of Role Playing Game. There are 3 phases in the history game Sunan Ampel, namely: the phase in Wonokromo, the phase in Yellow Flower, and the phase in Ampel. Some NPCs are involved such as some wild animals, residents, Kibang Kuning and Prabu Brawijaya. The blackbox testing of interface and game design results show that all game features are running well on desktop platforms and the games storyline has illustrated some of the history of Sunan Ampel.

Keywords
History of Sunan Ampel, Surabaya, Game Applications, Role Playing Games, Desktop Platform

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/98g6GrMYFDmA

Corresponding Author
Fathahillah Fathahillah

Institutions
(a) Dept. of Electrical Engineering, Universitas Negeri Makassar, Makassar, Indonesia
*) fathahillah[at]unm.ac.id
(b) Dept. of Renewable Energy Engineering, Politeknik Negeri Jember, Jember, Indonesia
(c) Dept. of Electrical Engineering, Politeknik Negeri Malang, Malang, Indonesia
(d) Dept. of Electronics Engineering, Politeknik Negeri Bandung, Bandung, Indonesia
(e) Electricity System Control , Jeonbuk Human Resources Development Institute, Gunsan, Republic of Korea

Abstract
Automation is widely used in various industries to increase the speed, accuracy, and effectiveness of production and reduce the risk of hazards. Generally, the manufacturing industry has a product packaging and sorting process based on size, weight, shape, height and color. At present, the sorting process carried out manually that produces human errors, so it is necessary to develop accurate low-cost automation. Industrial automation requires an automation system having low costs, low maintenance and user-friendly. Programmable Logic Controller (PLC) is one of the most widely used automation equipment in the industry and can be programmed to control the operation of a machine. Advantages of PLC are favored this trend, instead of using custom-made controller systems, quality parts at a reasonable cost, specialized maintenance support. In this paper, PLC has been developed to control multi machine operation with product sorting and packaging based on product color. The multi machine operation consists of three DC motors used for conveyors, two single solenoids, proximity sensors, inductive sensors and limit switches. PLC uses Melsec Mitsubishi with ladder diagram programming using GX work2. The proximity sensor is used to detect the product color. The system is equipped with emergency button and alarm systems to facilitate the implementation of troubleshooting. To facilitate communication with operators and user-friendly systems, human machine interfaces (HMI) are used as interfaces for the system monitoring and controlling. HMI uses Pro-face from Schneider programmed using GP-Pro EX4.0. The ladder diagram has been implemented in PLC and tested on hardware to simulate the system. Based on the test results, Melsec PLC can communicate with HMI and control multi operation machine with product sorting and packaging. The machine can separate and package the metal product based on the color. By using Pro-face Human Machine Interface (HMI), the packaging system can be remotely monitored and controlled automatically.

Keywords
PLC, HMI, Automation, Multi operation machine

Topic
Industrial and Manufacturing Engineering

Link: https://ifory.id/abstract/U36gevwzb8Lp

Corresponding Author
Deina Amanda Amivisca

Institutions
Department of Electrical Engineering, Universitas Negeri Malang.
Jalan Semarang No. 5, Malang, Indonesia.
a) adeliarohma[at]gmail.com
b) deinaamivisca[at]gmail.com
c) heru_wh[at]um.ac.id
d) utomo.pujianto.ft[at]um.ac.id

Abstract
Attitudes assessment is one of the aspects of the assessment in Curriculum of 2013 or the K13. In order to assess the students attitudes in Curriculum 2013, a set of new rules has been implemented by Vice Principal for student affairs of SMK Negeri 2 Singosari in academic year 2017/2018. This is applied by having the students achievement books called Buku Prestasi Peserta Didik to monitor both their academic and non-academic activities. It is in the form of the students printed handbook. Both filling in the books and calculating the points that the students obtain are still done manually. Consequently, this manual process takes long time and arises some problems. Therefore, a solution to overcome these problems is needed. A possible solution to entering data accomplishments or violations committed by the students, monitoring the students attitudes both inside and outside their classrooms and calculating the results of end points they earn that will become the basis of the ranking points of their attitudes. This research aims at developing an Application for Monitoring and Assessing The Students Attitudes. The application was developed using a Waterfall Model consisting of four steps: (1) Analyze, (2) Design, (3) Code, and (4) Test. The application also implements the algorithms Simple Additive Weighting (SAW) for the process of ranking points the students attitudes of one class. In addition to developing products, product feasibility testing process was conducted to find out the level of validity and feasibility of the product to be applied in SMK Negeri 2 Singosari. Testing conducted by expert information systems and was based on the results from testing the functionality of the information system that obtained an average percentage of trial results functionality of 100%. Then testing was conducted by users at every level of user. Based on the results of the testing by users, it obtained an average percentage of trial results functionality of 99.88% and the average percentage of the results of the usability of 92.21%. Thus, this implies that this application was rated as excellent that can be used in SMK Negeri 2 Singosari as application for monitoring and assessing the students attitudes.

Keywords
Application for Monitoring and Assessing The Students Attitudes; Ranking Points; Simple Additive Weighting; Waterfall

Topic
Information Systems Technology

Link: https://ifory.id/abstract/AYwyun4mpkr3

Corresponding Author
yanty maryanty

Institutions
Chemical Engineering major Politeknik Negeri Malang, Soekarno – Hatta street no.09 Malang – East Java, Indonesia. 65123

Abstract
Molecular docking technique in in silico analysis of cellulase enzymes from Bacillus subtilis, Aspergillus niger and Trichoderma reesei was performed using Autodock Vina in the PyRx 9.5 program. The proteins used are Beta-1,4 endoglucanase from Asperillus niger (PDB ID 5I77), endoglucanase 1 from Trichoderma reesei (PDB ID 1EG1), Beta-1,4 endoglucanase from Bacillus subtilis (3PZT) and the ligand used is Cellulose (Pubchemerm reesei) ID 16211032). The PyMol 2.3.1 program is used to visualize the docking results, while the LigPlot 2.1 program is used to see the amino acid interactions that occur. Docking conducted in this study is blind docking by mimicking the interaction of target proteins and ligand control. Docking is a method for predicting the strength of interactions between receptors and ligands, based on binding affinity values. The more negative the value, the stronger the interaction that occurs between receptors and ligands. Compared with the results of cellulase docking enzymes, docking between richorderma reesei cellulose and cellulose gives the best results. Binding affinity scores (kcal / mol) Bacillus subtilis, Trichoderma receii, Aspergillus niger are -5.9, -6.2, -5.9, respectively. After knowing the value of binding affinity, it is necessary to do further analysis, to see the interaction of amino acids between proteins and ligands, using the LigPlot program. The results of the interaction of Bacillus subtilis, Trichoderma reseei, Aspergillus niger in hidrophobic binding are His235, Ala263, Tyr231, Trp207, Leu133; Tyr146, Trp320, Pro107, Gln174, Asp172; Ser233, Tyr227, Ser196 and Hydrogen Bonding Gln209, Glu169, Ser264, Glu298, His65, Trp291; Glu196, Glu201, Arg108, Ser318, Ser106, Tyr38; Gly232, Trp197, Asp163, Trp201, respectively.

Keywords
Docking technique, Bacillus subtilis, Trichoderma reseei, Aspergillus niger, binding affinity

Topic
Chemical Engineering

Link: https://ifory.id/abstract/Y7QbvXFDwEj4

Corresponding Author
Nur Yusuf Oktavia

Institutions
Dept. of Electrical Engineering
Institut Teknologi Sepuluh Nopember Surabaya

Abstract
Currently, emotions recognition has been attracting a lot of interest for researchers in various field, so as in the study of human-computer interaction (HCI). One of an interesting issue in HCI emotions study is the use of physiological signals, such as electrocardiograph (ECG), blood vessel pressure (BVP), electroencephalograph (EEG), and any others signals to recognize emotions. Among all physiological signals, EEG is known to be the most reliable modality to understand emotions processing and perceptions. Therefore, this study observed emotions recognition through EEG signals by investigating emotions cue from time domain features extraction for differentiating two class of emotions, namely, happy and sad. We developed an EEG based emotion dataset from 12 participants with 4 recording channels of EEG cap, i.e., AF3, AF4, O1, and O2. The time domain features of mean, standard deviation and number of peaks were extracted from alpha and beta frequency bands. For the recognition, we train the features set into Naïve Bayes learning classifier. From the results, it was shown that feature of mean gives the highest contribution to the classification. Moreover, from the observation of frequency bands, the combination of alpha and beta bands tend to provide better accuracy in emotion recognition rather than using alpha or beta frequency alone. The highest classification result of Naïve Bayes reached 87.5% accuracy of emotions recognition with 66% split testing option.

Keywords
Emotion from EEG, Statistical features, Naïve Bayes Classifier

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/UmjkqupE2tLy

Corresponding Author
wahyu nur hidayat

Institutions
Department of Mechanical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Educational Technology, Universitas Negeri Malang, Malang, Indonesia
Department of Computer, Palestine Technical University, Palestine
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia

Abstract
E-learning becomes one of the alternatives that bring together technological support with the current learning needs. Universitas Negeri Malang (UM) is one of the universities that have a concentration on the implementation and development of e-learning called SIPEJAR. The development of SIPEJAR should be balanced with evaluation or audit of the information system so that threats or losses can be avoided or prevented. This study aims to determine SIPEJAR performance from the governance of information technology in planning and organization on e-learning using COBIT 5 framework and provide recommendation governance improvement after knowing the gap between the current governance with the expected governance. Data collection techniques were conducted with interviews and questionnaires with SIPEJAR managers. Data analysis method using descriptive analysis. The result mentioned that deliver and support maturity level of information technology governance of SIPEJAR, which is at level 2 which means that managers have realized the need of IT development and formation of more professional organization. The gap analysis between expected conditions and current conditions averages are 3. Recommendations that can be given to the development of e-learning UM is to form organizations and sharpen the vision and mission of system development better.

Keywords
e-learning, evaluation, technology governance, cobit 5

Topic
Vocational Engineering and Technology

Link: https://ifory.id/abstract/BWLrfunNGe3T

Corresponding Author
wahyu nur hidayat

Institutions
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Education Technology, Universitas Negeri Malang, Malang, Indonesia
Department of Education Technology, Universitas Negeri Malang, Malang, Indonesia
Department of Informatics Engineering Politeknik Negeri Malang, Malang, Indonesia

Abstract
There is a paradigm shift in curriculum development and learning in 21st century universities. The curriculum is no longer organized in a separate but integrated manner or commonly referred to as transdiciplinary. There are several transdisciplinary learning strategies that need to be considered to be studied and developed as learning innovations. One strategy initiated through this paper is the Personlized Online Training System (POTS). POTS provides opportunities for students to search, process, analyze, interpret, and communicate data and information obtained on POTS media. The floating method used is 4D with four stages of development, namely define, design, develop, and disseminate. The research instrument used was a questionnaire with a Likert scale using the UEQ framework and conducted interviews with 22 system users. Result shows that user experience score, usability score, learning design validation score, and students response from the interview session indicate that the system is good; therefore, an improvement is needed.

Keywords
personalized learning, e-learning, peer learning, online course

Topic
Vocational Engineering and Technology

Link: https://ifory.id/abstract/9EPATpwdChfM

Corresponding Author
wahyu nur hidayat

Institutions
Department of Mechanical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia
Department of Educational Technology, Universitas Negeri Malang, Malang, Indonesia
Department of Computer, Palestine Technical University, Palestine
Department of Electrical Engineering, Universitas Negeri Malang, Malang, Indonesia

Abstract
E-learning has become the choice of several educational institutions to improve the quality of learning and educational affordability. Malang State University (UM) as one of the tertiary educational institutions also has e-learning infrastructure with its main system called SIPEJAR. Every UM lecturer is required to use SIPEJAR in synchronous and asynchronous learning, but until now the use of SIPEJAR has not been too massive. Therefore the purpose of this paper is to measure learning effectiveness and user experience by implicit evaluation. However, it cannot reveal what "user feels" through interaction with the system neither record user feedback. The research instrument used was a questionnaire with a Likert scale using the User Experience Question framework and conducted interviews with 48 system users. Result shows that user experience score, usability score, learning design validation score, and students response from the interview session indicate that the system is not good; therefore, an improvement is needed. For the future works, we proposed an evaluation of SIPEJARs governance and critical success factors to determine the carrying capacity of implementation and the factors that support the successful implementation of SIPEJAR.

Keywords
User Experience, SIPEJAR, e-learning, Universitas Negeri Malang

Topic
Vocational Engineering and Technology

Link: https://ifory.id/abstract/uVGZaCbQnW6J

Corresponding Author
Ahmad Fahmi

Institutions
Dept. of Electrical Engineering, State University of Malang, Indonesia
Dept. of Industrial Power Engineering, Universiti Teknikal Malaysia Malaka
Dept. of Electrical Engineering-Control System and Robotic-State Polytechnic of Malang, Indonesia

Abstract
Two-wheeled balancing robot (Segway) is a mobile robot that has two wheels on the right and left side that can not be balanced if not controlled. Segway is an underactuated and nonlinear system. Segway stability control method is presented in this paper. The simulation and modeling system of two wheels self balancing robot (segway) also proposed. By modeling and simulated, we knew the original response and controlled response of segway. Stability is an important parameter in designing of segway, we suggest a controller for the Segway to guarantee stability response using pole-placement method, The general pole placement technique which places closed-loop poles in desired locations in the s-plane is discussed.

Keywords
Pole placement, Segway, Modeling, Balancing, Control

Topic
Mechatronics and Robotics Technologies

Link: https://ifory.id/abstract/fDWhtbV7UBKn

Corresponding Author
faris abdul aziz

Institutions
a)Malang State Polytechnic of East Java Province, Indonesia. Address: Jl. Soekarno Hatta No.9, Jatimulyo, Kec. Lowokwaru, Malang City, East Java 65141
b) Applied Masters program (S2) in Electrical Engineering

Abstract
Abstract. Water is substance that is important for life after air, if it has been polluted by chemicals it is very dangerous for living things. The development of the industry uses chemicals in a production that causes hazardous waste, even though it has been reprocessed in the filtering process, if it is less than perfect, the water will be polluted if disposed of in the river flow. Identification and monitoring measures are needed that require media to use device that includes a sensor containing the pH of water that comes from the content of acidic substances in water, turbidity or the content of solid objects in water, and water temperature. The data collection method uses the node MCU microcontroller. Then the data is sent via wireless connection to be stored on the database server. Testing to see the results of monitoring using an android application that is connected to the server. From the results, it can be concluded that the data displayed on the application can run smoothly, the value displayed can be seen in real time.

Keywords
monitoring systems, Ph, turbidity, temperature, node MCU

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/x6TryU2JAtMC