Indonesia Conference Directory

Corresponding Author
Ahmad Maulana

Institutions
State Polytechnic of Semarang

Abstract
As one form of efforts to improve its quality, it is proper implementation of the college implemented through a good planning system through the existence of a strategy and development plan in a college. Therefore it is necessary to do an information technology investment to improve the effectiveness of work. In this regard, information technology has become a fundamental need for universities to survive and achieve competitive advantage. But the other side there are some things that are constraints that is investment in information technology requires a relatively large cost. This condition requires careful planning in implementing information technology. It also requires good governance in order to obtain maximum results and benefits for an organization. The purpose and benefits of this research is to produce strategic planning information System Management, unify the steps to develop a work program or development in the computer Technical department DIII Polytechnic Harapan Bersama so that it will Improve service and performance in this unit. The research methods conducted by researchers are action research with the Ward and Peppard analysis methods. Data collection using: Observation methods, interview methods, questionnaire methods, library study methods

Keywords
Information System Management, Polytechnic, College

Topic
Information Systems Technology

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

Corresponding Author
Nawir Rasidi

Institutions
a,b,c, d) Civil Engineering, Politeknik Negeri Malang
Jl. Soekarno Hatta No. 9 Malang, 65141
*nawir.rasidi[at]polinema.ac.id

Abstract
Lightweight interlocking brick is one alternative to replace conventional clay brick through combustion. This study relates to the design of the proportion of interlocking light brick mixtures as well as concrete sand and foam agent in various percentages and found the optimal percentage of foam agent by testing cylindrical specimens casted for 28 days compressive strength and finally testing each others lightweight brick shear strength lock in full scale model. The final report provided the results of investigative experiments in which compressive strength, water absorption and density were investigated using the optimal percentage of the proportion of foam agent, sand, cement, and aggregate mixture. The results of the experiment are compared to ordinary clay bricks. In conclusion, the concept of lightweight interlocking brick system has been widely used as a replacement of the conventional clay brick system where it has been utilized either as load bearing or non-load bearing brick system. The results show that the brick with foam agent is lighter, more durable aggressive environment and better strength for use in the walls of the building so that it can be mass produced by the brick industry.

Keywords
interlocking, lightweight brick, compressive strength, proportion

Topic
Civil Engineering

Link: https://ifory.id/abstract/GFTk7pjJEy8L

Corresponding Author
Yulianto -

Institutions
Department of Electrical Engineering, Malang State Polytechnic

Abstract
The windmill tail that is widely used is a single tail that has a performance of a large zero offset. This study is to get a windmill tail pattern with a fast response and good direction stability. The aim of this study is to obtain a windmill tail pattern with the most stable direction stability under load conditions and changing wind direction by comparing the stability of several alternative windmill tail patterns. The process of data collection is done by comparing the performance of 3 types of windmills: single tail, semi-differential tail, and differential tail. The variables are speed of wind direction, speed of change of wind direction, differential angle of zero offset error, speed of change of direction, and torque produced. The material obtained from the test results was transcribed and analyzed. The results of the analysis are used to design windmill tail prototypes. From the analysis results show that the swing torque at the differential windmill tail is proportional to the sinusoidal swing angle, the differential angle gives the effect of the torque scale in a cosine manner. Whereas on a single pinwheel produces torque proportional to the sine squared with respect to the swing angle. The differential tail has performance with better speed and stability, but produces vertical vibrations so it is preferable to use a semi-differential pinwheel with a differential angular size tuned in the system.

Keywords
windmill, differential tail, stability, offset error

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/vNqnZCbRGUd9

Corresponding Author
Achmad Chumaidi

Institutions
Chemical Engineering Department, State Polytechnic of Malang, Malang, Indonesia

Abstract
Increasing demand for fossil fuels and environmental awareness are encouraging people to obtain alternative fuels from biological sources. Oil and fat are candidates for raw materials that have high potential in producing renewable fuels. The production of renewable diesel fuels is an emerging choice to increase the availability of liquid fuels. The raw material used in this study was palm stearin which was saponified with a KOH catalyst and added Mg-Zn as a catalyst for the decarboxylation reaction. The independent variables used in this study, namely the weight of catalyst from 1% -7% and the decarboxylation process time of 0.5 hours-2 hours. The results showed the best conditions at 5% catalyst weight during 1 hour processing time, with C2-C7 composition at 33.10%, C8-C11 composition at 51.56%, C12-C24 composition at 15.34%, -C- composition at 67.37%, composition -CO- by 1.44%, and composition -COO- by 31.19%.

Keywords
decarboxylation, fuel, catalyst, palm stearin

Topic
Chemical Engineering

Link: https://ifory.id/abstract/A89zfJWPe4Tt

Corresponding Author
HARIYADI SINGGIH

Institutions
State Polytechnic malang

Abstract
ABSTRACT. Methods of the processing dairy products other than pasteurization and reducing water content (condensed milk), milk can also be processed into cheese. namely with the cheese maturation method. Maturation is the final process of the cheese making process. Maturation (ripening) is a process that converts fresh curds (raw cheese) into cheese full of flavor. The research of the method of cheese ripening process is used Propotional Derivative Integral (PID) controler to control the parameters of temperature and humidity in the cooling room. embeded through ATMEGA 16 devices as controllers, the sensing process is used by temperature sensors, humidity sensors and peltier devices as coolants for the ripening process. The desired temperature setting is 16-20oC with a% humidity level. After the room temperature is reached 16-20oC with% humidity then the cheese material is inserted into the cooler for the ripening process. The working principle of this system is to stabilize temperature and humidity. Test of the results obtained by the value of the parameter controller Kp = 5.53, Ki = 8, Kd = 2, for the 16-200C temperature setting and% humidity. Changes in time from room temperature to set-point temperatures are relatively fast with the overshoot percentage of 11.11% and the rise time of 9 minutes.

Keywords
Propotional Integral Derivative, Cheese, Peltier, temperature, humidity.

Topic
Electronics and Microelectronics Engineering

Link: https://ifory.id/abstract/xbvMHzwZXu3T

Corresponding Author
Nadia Putri Wijanarko

Institutions
Universitas Indonesia

Abstract
Digital Image Correlation (DIC) is a new, cutting edge technology employed the study full-field displacement of materials- surface concrete applied to hard concrete specimens. DIC uses the help of digital images that was recorded sequentially during testing period. Principally, DIC tracks down pattern imposed on the surface within the sequence of images. There had never been a research conducted using the method in Indonesia using conventional tools. This research proves that such thing is possible. The component and steps to DIC are extensively discussed in the research; speckle pattern, method of record, images produced, and data computation. Through this research, the behavior of how displacement and strain develops when concrete is subjected to compressive testing can be studied. The results of the research were analyzed quantitatively using the digital images and its computation based on computer software used. Additionally, provided that this was a preliminary research, there are many aspects and suggestions found from this research that will be applicable for future researches.

Keywords
Digital Image Correlation, DIC, Concrete, Digital Image, Strain, Displacement

Topic
Civil Engineering

Link: https://ifory.id/abstract/7bHmEZk46pcC

Corresponding Author
Aditia Febriansya

Institutions
(a) Department of Civil Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Ds. Ciwaruga, Bandung 40012 , Indonesia
*aditia.febriansya[at]polban.ac.id

Abstract
At the end of 2016, a significant displacement occurred at P2 pier of Cisomang Bridge at Purwakarta-Bandung-Cileunyi Toll Road KM 100+700, West Java. The shift of pier is caused by the movement of soil under the substructure that has been indicated since 2012. P2 pier is constructed over clay shale which has characteristics when in dry condition, the soil has high shear strength, but when the soil absorbs water or expose in open air, the soil loses its strength. P2 pier displacement results in extreme structural damage, so immediate handling is needed to stop the shifting of the pier. Analysis and reinforcement study are carried out using finite element method. Based on analysis, it is discovered that the existing slope stability safety factor of P2 pier is 1.09, indicating that the soil movement can occur if the clay shale is disrupted. Reinforcement is designed to mitigate the shift of the P2 pier by adding 38 pile foundations to the existing foundation configuration. Each pile have diameter of 1.2 meter with a depth of ±30 meter across the existing slip circle. Reinforcement increases the slope stability safety factor to 1.25, indicating that the P2 pier after reinforcing is in safe condition.

Keywords
Bridge, Substructure, Pier, Foundation Reinforcement, Clay Shale

Topic
Civil Engineering

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

Corresponding Author
Ratih Indri Hapsari

Institutions
1) Department of Civil Engineering, State Polytechnic of Malang
2) Department of Informatics Technology, State Polytechnic of Malang
*) ratih[at]polinema.ac.id

Abstract
Lahar disaster is a debris flow event following volcanic eruption that is triggered by intense rainfall. This disaster induces a potential losses that include casualty, damage or loss of property, and environmental disruption. In this study the system of lahar vulnerability assessment is developed. The target area is a river is Merapi volcano Indonesia. Naive Bayes Classifier Method is applied to classify areas or flood-prone zones or safe. In this study, the database and the interface is created using MySQL and PHP Hypertext Preprocessor. The determining factors are spatially distributed rainfall intensity from X-band weather radar, topographical factor, and soil type. This research has produced a flood disaster status determination system on the slopes of Merapi with an accuracy rate of 84.6%, from the results of taking 10% of the training data. The output of this system is an information system shown in vulnerability map that provides information about the status of susceptible zones to lahar flow.

Keywords
Lahar, Naive Bayes Classifier, Merapi Volcano

Topic
Civil Engineering

Link: https://ifory.id/abstract/qBX3ru6TULnC

Corresponding Author
Syamsul Hadi

Institutions
Department of Mechanical Engineering, State Polytechnic of Malang, Jl. Soekarno-Hatta 9, Malang 65141, Indonesia

Abstract
Fatigue life prediction for engineering material is important for predictive maintenance to support accident prevention in a high-risk equipment. The study aims to determine the ability of the machine prototype of rotating bending type fatigue test and to find out the fatigue life of Nylon and cast iron specimens. By knowing the fatigue life of a plastic and ferrous metal material, the prediction of fatigue life can be applied to a maintenance plan. The design and manufacture of rotating bending fatigue testing machines equipped with copy turning devices can be used to prepare specimens from plastic/soft metal materials, thus becoming an integrated fatigue test machine. The method used includes determining the size of standard fatigue test specimens, turning various fatigue test specimens, carrying out fatigue test specimens of nylon and cast iron materials, and analyzing the results of fatigue tests. The test results of the fatigue test machine prototype showed the ability to turn plastic and soft metal materials, and the fatigue life for Nylon 6.6 ranging from 659 to 13216 rotation at 229 to 26 MPa stresses, and for cast iron from 142 to 22863 rotation at 229 to 147 MPa stresses.

Keywords
fatigue life, Nylon, cast iron, copy turning devices, and rotating bending fatigue testing machines

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/qcdZwb3TFz24

Corresponding Author
Kholid Fathoni

Institutions
Politeknik Elektronika Negeri Surabaya

Abstract
Khalid ibn al-walid was a hero of Islam who was very meritorious and inherited many exemplary values, namely sincerity, struggle and intelligence. But many people dont know this hero. This is due to the widely available media introduction of Khalid ibn al-Walid figures such as history books and comic books that are less interesting. This can be overcome by developing an interactive historical game Khalid ibn al-Walid. This game is built with 3D characters using the arcade genre and the First Person Shooter viewpoint. There are 4 parts in this game namely Prologue, Phase Before Islam, Islamic Phase, Epilogue. The test results show that all game features can work properly. Then the game was tested on 10 users and they stated that they had received information about Khalid ibn al-Walid from this game.

Keywords
Khalid ibn al-walids history, 3D games, arcade, First Person Shooter

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/rcat8JjWD3kg

Corresponding Author
Wahdiah Zunda Utari

Institutions
Bandung State Polytechnic
Gegerkalong Hilir Street, Bandung 40012, Indonesia

Abstract
Oily-Sludge is a waste that occurs in processing, distributing, and storing petroleum. On the other hand, Buton Asphalt in Buton Island has a natural asphalt content that is not less than 650 million tons, with Buton Asphalt content varies between 10-35% which is equivalent to 170 tons of oil asphalt (Department of Public Works, 2010). The problems faced by the asbuton pavement as a binder is the quality of asphalt concrete produced cannot yet compete the oil asphalt pavement as a binder. In this study, a test is conducted to identify the behavior and characteristics of Marshall and dynamic stability on the mixture of Asphalt Concrete – Wearing Course (AC-WC) with the use of asbuton as binder and OS as the rejuvenation material of asbuton. The variation of asphalt content used are 4,5%, 5%, 5,5%, 6%, and 6,5%. Based on the result of the test, the dynamic stability value of asphalt and asbuton mixture that has been rejuvenated has a higher value than the mixture without asbuton.

Keywords
asbuton, oily-sludge, rejuvenation

Topic
Civil Engineering

Link: https://ifory.id/abstract/prYV4ybvczX2

Corresponding Author
Hesty Eka Mayasari

Institutions
Center for Research and Standardization of Surabaya

Abstract
Chloroprene rubber (CR) is synthetic rubber widely used for seal, joint, and also adhesive. For making rubber good, additives are needed and it can influence the properties of vulcanizate. Phenolic resin is used as additives in this study. This study aims to determine the curing characteristics and mechanical properties of chloroprene vulcanizate. The chloroprene vulcanizates were made by two-roll mill by adding phenolic resin. The phenolic resins were varies i.e: 0, 10, 20, and 30 phr. The curing characteristics of the CR vulcanizates were studied by rheometer at 140 ºC, 150 ºC, and 160 ºC. The phenolic resin improves the mooney viscosity, scorch time and optimum curing time. The compound without phenolic resin gives the highest mooney viscosity and optimum curing time. The 10 phr phenolic resin give the best mooney viscosity, optimum curing time, constant rate, activation energy and also tear strength. The suitable curing temperature for CR compound is at 150 ºC and the 10 phr phenolic resin is the proper additive for CR vulcanizate

Keywords
Phenolic resin, tackifier, chloroprene, adhesive

Topic
Chemical Engineering

Link: https://ifory.id/abstract/a2nJLBbA8xHW

Corresponding Author
Prayitno Prayitno

Institutions
State Polytechnic of Malang

Abstract
In the seaweed processing industry to obtain quality products that are free of microorganisms, high concentrations of chlorine are used in the immersion process. Thus the wastewater from the immersion process still contains high concentrations of chlorine, where the wastewater when disposed of into the aquatic environment can cause pollution and environmental damage. The aim of the research is the reduction of high levels of chlorine in seaweed wastewater using a combination process of aeration, heating and addition of HCl. The experiment was carried out by adding wastewater from the seaweed immersion process with HCl (1, 2, 3, and 4% v/v), aerated at flowrate (1, 1.5, 2, and 2.5 liters/minute) and heated at temperature (35, 40, 45, and 50oC). The experimental results showed that the maximum reduction of chlorine by 99.4% was obtained by adding HCl by 4%, flowrate of 2.5 liters/minute and heating temperature of 50oC.

Keywords
Aeration, Chlorine, Immersion, Seaweed, Wastewater

Topic
Environmental Science and Engineering

Link: https://ifory.id/abstract/73Nv69xGUZDj

Corresponding Author
Heny Dewajani

Institutions
State Polytechnic of Malang

Abstract
Nowdays, biodiesel is a one of renewable bio fuel which being developed. By increasing biodiesel production, will increase the formation of glycerol as a by-product of the reaction. So it takes some effort to convert the glycerol into another product in order to increase the economic value of glycerol. One of these is by converting glycerol into triacetin which can be used as a bio additive in fuel through the acetylation process. The important thing to do before converting glycerol is removing the impurities from the crude glycerol. This study aims to determine the effect of concentration and type of acid used in the glycerol purification process. The purification process were done by acidification, adsorption, filtration, distillation and evaporation. The acidification processes use H3PO4 (85%), H2SO4 (98%), HCl (37%) and the acid percentage is 0.5%, 1%, 2.5%, 5%, 7.5%, 10% (v/v). The purified glycerol were analyzed using GC (Gas Chromatography) to determine glycerol content, water content, density and viscosity and is converted to triacetin by the esterification reaction using Ni / Zeolite as a catalyst. The esterification products were analyzed by titration to determine the reaction conversion. From this study it can be concluded that the highest glycerol concentration was achieved in the addition of H3PO4 with a concentration of 5% (v /v) with glycerol content of 79.59%, density 1.277 g / ml, viscosity 266.48 cP, moisture content 3.261% and glycerol conversion 82.39%. And its application as a bio additives can increase the Octane Number of commercial gasoline by 6.5%.

Keywords
glycerol, acidification process, esterification reaction, bio additive

Topic
Chemical Engineering

Link: https://ifory.id/abstract/YQGtuMZhznJ6

Corresponding Author
Mira Esculenta Martawati

Institutions
POLINEMA

Abstract
In 2017, the Central Bureau of Statistics recorded cases of theft of motorized vehicles and embezzled cars from rental services totaling 35,226 cases. The purpose of this research is to develop and make vehicle safety modules from previous research. This tool can turn on and l off ignition remotely where the coil will be connected to a relay that will be controlled by a microcontroller. The microcontroller will be connected to the internet network and can be controlled through the website interface. This tool can also determine each position of the vehicle quickly and continuously or realtime. the workings of this tool information on the position of the vehicle originating from the NEO 6M GPS sensor will be sent by the microcontroller to the internet database, from the database can be seen through internet addresses available using a web browser and also an android application integrated with the system so that vehicle owners can immediately turn off ignition. This research is to find out the performance of a device with 4G LTE internet network for XL, Telkomsel, Smartfren and Indosat provider in Indonesia and find out the response speed of the device when there is theft or embezzlement.

Keywords
vehicle safety, internet of things, Arduino ESP 8266, Mobile Wi-Fi

Topic
Information Systems Technology

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

Corresponding Author
Vivin Ayu Lestari

Institutions
Department of Information Technology, Politeknik Negeri Malang.
*vivinlestari91[at]gmail.com

Abstract
The Indonesian government has serious attention to facilitate the health of its people, one of which is by establishing Badan Penyelenggara Jaminan Sosial (BPJS) hereinafter BPJS. The Government of Indonesia collaborates with several parties including primary health facilities, General and Regional Hospitals, as well as general practitioners and specialists who have been appointed by BPJS. The aim of this study is the user-s perception of Primary Care applications at primary health facilities BPJS in Malang. This study uses the Update D & M IS Success Model to assess the success of an information system where its use is mandatory at primary health facilities. The model contains 6 dimensions that can measure the success of a system are Information Quality, System Quality, Service Quality, Use, User Satisfaction and Net Benefits. This research is a quantitative study using a questionnaire with a Likert scale. The sampling method was carried out using purposive sampling in determining respondents is doctors or admins who operated directly on primary care applications at primary health facilities. The results of this study indicate that primary care applications can be categorized as successful information systems for each dimension of success in the Upadate D & M IS Success Model.

Keywords
Information Quality; Intention to Use; System Quality; Service Quality, User Satisfaction

Topic
Information Systems Technology

Link: https://ifory.id/abstract/tV6CPc9jU2Td

Corresponding Author
Yeni Rahmawati

Institutions
Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia
*rifqah_18des[at]chem-eng.its.ac.id

Abstract
The phenomena of membrane wetting is a problem that can reduces the performance of membrane contactor during the CO2 absorption. The effect of membrane wetting can causes increased in mass transfer resistance and damage to the membrane surface morphology. To avoid this problem, hydrophobic membranes are used and the pressure of the solvent maintained so as not to exceed the critical pressure of the membrane. In this research, we will compare the effect of diethanolamine and activated solvents using piperazine (PZ) and monosodium glutamate (MSG) on changes in pore size, contact angles and their use for CO2 absorption. The membrane pore shape was observed from the membrane surface analysis using a scanning electron microscope (SEM), whereas for the contact angle using the Wilhelmy method. From the experiment it was found that the structure and pore size of the polypropylene membrane had changed due to contact with the solvent. The results show that used of activated solvents can reduce the phenomena of membrane wetting, where piperazine as an activator shows better results than MSG. The experimental results of the CO2 absorption process showed that the CO2 removal using a DEA-PZ solvent reached 93%, which is 1.7 times higher than the DEA solvent.

Keywords
activated solvent; diethanolamine; CO2 absorption; membrane contactor; wetting phenomena

Topic
Chemical Engineering

Link: https://ifory.id/abstract/FZav3xJCr2Rp

Corresponding Author
Tanya Audia Balqis

Institutions
Civil Engineering Department, Politeknik Negeri Bandung, Indonesia
Post-Graduate Student of Infrastructure Engineering Study Program, Applied Master Program, Politeknik Negeri Bandung, Indonesia

Abstract
This research is performed to analyze effect of using crumb rubber (CR) on the overlay design of Palembang City – Betung roads. Analysis of existing road conditions using the AASHTO 1993. This analysis based on deflection data using the Falling Weight Deflectometer (FWD). While, the overlay design analysis using CIRCLY 7.0 software to determine horizontal tensile strain (ɛh) for fatigue live and vertical compressive strain (ɛv) for rutting live parameters. The result showed that using CR can increase fatigue live into 66 % and rutting lives into 22 % for contribute pavement performance. To ensure the effect of CR in pavement-s performance, further research must be taken to find out if there are other effects that support.

Keywords
Crumb Rubber, Fatigue, Rutting, Flexible Pavement

Topic
Civil Engineering

Link: https://ifory.id/abstract/N7QW64jqKYnX

Corresponding Author
Agung Sedayu

Institutions
State Islamic University of Malang

Abstract
The Terboyo Terminal Semarang had been officially closed its operations and services in 2018 by the Ministry of Transportation of the Republic of Indonesia. This terminal is a terminal type A that has an important role as a transit point for public transport between cities between provinces that connects between Surabaya-Jakarta via the northern coastline. This study aims to evaluate the performance degradation factors that cause this terminal service to be closed, so that this research can be used as a recommendation so that there is no recurrence of the failure of transportation infrastructure development, especially road transport passenger terminals. The data collection phase uses a questionnaire distributed to a number of respondents. The research respondents are terminal users who are aware of terminal developments, namely public transport passengers, public transport operators and commercial area tenants. The research method used is multiple linear regression analysis with the composition of the dependent variable components are terminal performance and independent variables covering the reliability of transportation, architectural aesthetics, material and structure, utility and environment, and behavior and social interaction. The results describe that the five independent variables have a significant effect on the dependent variable of terminal performance. The utilities and environmental independent variable become a variable with the most significant level of influence. This result is relevant to the current terminal problems, namely the utility of buildings and terminal areas that are not good, where the terminal area often floods due to the proximity of the Java sea coast.

Keywords
Evaluation; decline; performance factors; passenger terminal; road transport

Topic
Civil Engineering

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

Corresponding Author
Imam Fahrur Rozi

Institutions
State Polytechnic of Malang

Abstract
Technology is developing rapidly and is having widespread use. Practical in use, speed in processing data are some main factors that encourage the use of technology in many business processes. Professional certification process held by LSP (Lembaga Sertifikasi Profesi) P1 Polinema, is one of complex business process that needs information technology as a tool to run the business. Professional certificates given through the certification process are formal proof to recognize the skill level. This research develops a management information system to manage the certification process that is accessible through internet. If many information systems are generally built by using a monolithic approach, this research performs development based on microservices approach. If an application or system developed by using monolithic architecture, it is wrapped in a large package, so that when there is a change it will affect the other parts. It means that it is difficult to maintain and will affect the production process. The microservices architecture offers a slightly different approach, a software architecture concept that can be a solution to make large-scale software more organized and can quickly adapt to the development of existing business needs. To speed up the deployment and testing process utilizing continuous integration so that the development process is consistent and can check regularly to reduce errors obtained.

Keywords
professional certification, microservices, monolithic

Topic
Information Systems Technology

Link: https://ifory.id/abstract/7zVrFyUjBJta

Corresponding Author
R Edy Purwanto

Institutions
Politeknik Negeri Malang

Abstract
Heat loss occurs due to the temperature difference between the fluid flowing in the pipe and the temperature outside the pipe, it can also occur due to inappropriate material selection and insulation thickness. Insulation is a method for reducing the rate of heat transfer from inside a pipe to the outside of the pipe. Valve is an object that is often encountered in un-insulated conditions so that there is a lot of heat loss in this section. Therefore, an insulation method and the right insulation material are needed to prevent heat loss. The study was conducted to see the effect of two glass wool and rock wool insulation materials on heat loss. The study used a simulation method using NAIMA 3E Plus software. The output of the simulation is the value of heat loss on glass wool and rock wool material. Data analysis using two-way ANOVA method assisted by Minitab software. The results show that the higher the temperature, the greater the heat loss value and the thicker the insulation layer, the smaller the heat loss value. Insulation material is better to use rock wool.

Keywords
thermal insulation, heat loss, valve, glass wool, rock wool

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/n9AqzQZKgcr2

Corresponding Author
Azzumar Utami

Institutions
(a*) Student of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email:
azzumarutami[at]gmail.com
(b) Faculty Staff of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email: riawan.gunadi[at]gmail.com

Abstract
The steel structure is commonly acknowledged able to return to its original strength condition. It is yet unknown whether composite structure may return to its initial condition. Test specimen on the present study consists of 8 units, each of them divided into four stud-connector bold (SP) composites beams and four UNP connector (SF) composite beams. Each of the specimen has control value by SP/020 and SF/020, and other six specimens with combustion of SP/400, SP/550, SP/700 and SF/400, SF/500, SF/700, within condition of point load for about 12 kN. The study intend to investigate composite girder of post-fire bridge element towards duration and heat temperature factors and effect of beam performance towards stud-connector and UNP connector composites. The results draw several conclusions; (1) the process of composite combustion shows that the failure on composite steel beam specimen is due to the load, burning duration and temperature which results in residual deflection, (2). Deflection test reveals the effect of temperature, load, and duration do not give significant impact to load capacity of post-combustion beam structure. (3) The tensile test on the post-combustion steel. The higher the temperature and the longer the duration, the greater the melting reduction and strain hardening.

Keywords
Combustion; temperature; composite; duration; load

Topic
Civil Engineering

Link: https://ifory.id/abstract/THPYgy3VDQZ8

Corresponding Author
Mela Damayanti

Institutions
(a) Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung.
Jl. gegerkalong Hilir, Ds. Ciwaruga. Bandung, 40012. Indonesia.
*simeladamayanti[at]gmail.com

(b) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung.
Jl. gegerkalong Hilir, Ds. Ciwaruga. Bandung, 40012. Indonesia.

(c) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung.
Jl. gegerkalong Hilir, Ds. Ciwaruga. Bandung, 40012. Indonesia.

Abstract
Flood is an important phenomenon which often occurs in cities recently. The Case of this paper is the flood in Dr. Junjunan Roadt which is one of high density roads in Bandung and the main road to Cipularang Toll Road. The floods height is up to 40-50cm, and the average of flood duration is abaout 30 minutes. The rainfall used for counting in this research is a return period approximately 25 years with the rainfall value of 80.1 mm. The solutions for reducing the floods is by increasing the drainage capacity as well as increasing the water infiltration to the ground. The reserach method uses the physical experimental model, using the scale mode of 1:30. The experimental results are tested through validation process using Hecr-RAS 5.0.7. Furthermore for the testing model, a scheme of two drainage streams and one river which leads to Citepus river through Box Culvert is used. The results of the testing model indicate that increasing the drainage capacity along the street is the most effective solution in decreasing the potential of floods, while applying the pourous drainage may also reduce the debit of water run off.

Keywords
Rainfall, cities flood, drainage, infiltration, Hecr-RAS 5.0.7

Topic
Civil Engineering

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

Corresponding Author
Aghnia Darajatun

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
Urban floods has become a critical phenomenon recently. These are mostly caused by the fast increase of building growths. The need of mitigation of floods to save road users becomes an important aspect in urban area. This paper is to find a solution the case of flood in Pagarsih Road which was occured at 2016 with standard the rain fall cyclus for 25 years. The characteristic of Pagarsih Road floods are due to the overflow of Citepus River which lays beside the road. A kind of the road infrastructure proposed to solve the problem is a porous reservoir which functioned as the water storage of run off. The method used in this research is a simulation using a physical model as well as the manual calculation using Hec Ras. The model is to simulate the existing condition as well as the proposed solutions. The alternative solution developed is tested by providing several reservoir volumes and also by adding pourous facilities to increase the reservoir capacity. The validation test is carried out by using HECRAS-5.0.7 to achieve a certain reliable solution. The result shows that the reservoir storage capacity is the dominant parameter to mitigate the risk of floods.

Keywords
flood, reservoir, physical model, HEC RAS 5.0.7, capacity.

Topic
Civil Engineering

Link: https://ifory.id/abstract/DFpNybAgZW2V

Corresponding Author
Moch Sayid Assaury

Institutions
a)Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung
*limzsevensquad[at]gmail.com
b)Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung
c)Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung

Abstract
Side frictions along the market area of Tanjungsari often cause traffic congestion during peak hours. The traffic congestions are caused by the high frequency of side frictions decreasing the effectivity of road capacity value. This paper analyse the degree of saturation due to side frictions influencing on traffic congestion as well as providing some effective alternative solutions. The traffic congestion analysis method refers to the PKJI 2014 by considering the level of service standard. The three alternative solutions are simulated by the detouring and widening road as well as combining those alternatives. The solutions are concerned with the level of service standard for 10 years period. The analysis results shows that the most effective alternative solution is a combining solution between road widening and detouring. The other result shows that detour could solve congestion if the width of alternative road equals to the width of previous main road.The result of combining alternative shows that the level of service may achieve the category of "C" complying to the rural road standards. The degree of saturation Bandung-Sumedang segment is 0.51, whereas Sumedang-Bandung segment is 0.74. These solution achieve upto 57% reduction of traffic congestion Bandung-Sumedang section and 52% Sumedang-Bandung section.

Keywords
Traffic congestion, Road Capacity, Degree of Saturation, Side Friction

Topic
Civil Engineering

Link: https://ifory.id/abstract/F8CxtXRkBupK

Corresponding Author
Kathy Sulistianny

Institutions
a) Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung
*sulistiannykathy[at]gmail.com
b) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung

Abstract
The Construction of Antapani Flyover has caused traffic congestion. This paper is to find the solution to achieve the queuing standard allowed refering to PKJI 2014. The method of research uses the risk analysis. The analysis is focused on the two critical construction works, namely abutment and bridge wall works. The traffic congestion analysis considers the narrowing road due to construction disruption. The traffic congestion analysis was carried out by comparing the congestion of the existing construction with the construction method proposed. The three proposed alternative solutions are by the increasing road capacity, scheduling construction methods, and a combining solution those two alternatives. The results shows that the best alternative solution to reduce traffic congestion during construction is a combined solution between the increasing road capacity and scheduling construction methods. The result of alternative solution shows the decrease of queue on Terusan Jakarta road reaching up to 90% from the existing condition. The conclusion describes that the narrowing road of work zones of construction has a huge influence on traffic congestion. By this result is suggested to consider the magnitude of disturbance as well as the solution of the traffic congestion that may occured.

Keywords
Traffic Congestion, Queuing Standard, Construction Road, Antapani Flyover.

Topic
Civil Engineering

Link: https://ifory.id/abstract/H4kEKYG6T3Mt

Corresponding Author
Joosten Joosten

Institutions
Gajah Mada University

Abstract
The testing phase is always one of the important stages in developing a software. Without this stage, software errors will be difficult to find at the beginning of the software development. This study uses a decision table method that aims to shorten the rule of software testing. The advantage of this method is that it can help make fewer rule combinations for testing. This study uses a medical information system as a case study. In the medical information system, 20 test cases were identified early in the software testing process. Of the 20 test cases, there are 7 test cases that have the same characteristics so that they can be combined into only 13 test cases. Therefore, it can be concluded that the decision table method can reduce software testing time.

Keywords
software testing, rule, decision table

Topic
Information Systems Technology

Link: https://ifory.id/abstract/wfNa7FbPyZGr

Corresponding Author
Hendra Pradibta

Institutions
1,2 Jurusan Teknologi Informasi/ Information Technology Department
Politeknik Negeri Malang /State Polytechnic of Malang

Abstract
At present, the learning model with practicum learning methods in the laboratory is considered an effective learning model. However, from these advantages, there are weaknesses. One of the weaknesses of practicum learning methods is the high cost of learning because it requires much equipment. Digital Learning is an educational concept that utilizes information technology in the teaching and learning process. The concept of learning in digital multimedia is by utilizing virtual reality technology. The concept of virtual reality that simulates the real world into the digital world can be used as a solution to overcome the weakness of existing learning method. This study provides the development of virtual reality for practicum learning in the laboratory. The knowledge base applied came from scientific experts and used as a rule in learning. The purpose of developing this application is as a prototyping framework of virtual learning that can be applied to laboratory practicum learning.

Keywords
Practicum Learning, Laboratory, Virtual Reality, Knowledge Base, Artificial Intelligence

Topic
Information Systems Technology

Link: https://ifory.id/abstract/jfG92unJcdNF

Corresponding Author
Qomariah Qomariah

Institutions
Politeknik Negeri Malang

Abstract
Sandblasting and water jetting have been utilized to remove accumulated organic matter and other debris from substrates such as concrete, steel, and wood components. Sandblasting process produce waste sand that is harm full for heath. Sandblasting waste is easy to get for free from PT. BOMA BISMA INDRA which is located in Pasuruan East Java. The objective of experimental Laboratory for an evaluation of substitution waste of sandblasting sand in mortar and concrete mix for its strength, absorption and work ability of the mix. By using mortar cube 10 x 10 cm and concrete mould cylinder 15 x 30 cm specimen for curing time 7 and 28 days. The fraction of waste sand are 0%,10%, 20 % and 30% of natural sand. As a result of the experiment. The compressive strength of mortar is increase 5% for 10% sandblasting, 7% for 20% sandblasting, and 12% for 30% sandblasting. While concrete are increase 7% for 10% sandblasting, 12% for 20% for sandblasting, and 16% for 30% sandblasting along with increased of waste sand use. An absorption of concrete become smaller compare the normal concrete but work ability of the concrete mix increased which indicated by slump value.

Keywords
sandblasting sand, mortar,concrete, slump, compresssive strength, absorption

Topic
Civil Engineering

Link: https://ifory.id/abstract/GtTug4nPpHRV

Corresponding Author
Muhammad Nanak Zakaria

Institutions
Politeknik Negeri Malang

Abstract
The development of communication technology, both on algorithms and devices has been so rapid. With a large number of buildings with wide locations, there are still many spaces that are not reachable by communication devices. Therefore, it is necessary to add a new communication tool that can be used to convey information in the campus environment intended for announcements, from one place to another or from one room to another simultaneously, both with point to multipoint as well as point to point characteristic which is suitable for internal communication and emergency situations. Using a WiFi (Wireless Fidelity) Module which is a Wireless Local Area Network based on the IEEE 802.11 specification. This wireless network can be expanded without using a backbone cable. Digital audio effects can be applied in real time using DSP (Digital Signal Processing) Starter Kit TMS320C6713 by implementing Simulink in the model. From the results of 1 kHz tone signal processing, the amplitude changes periodically between 81.6 dB to 94.3 dB. For periodic frequency changes between 502 Hz to 950 Hz there is a distortion of 95.7 dB, where the resulting sound output effect has little noise on the output signal.

Keywords
TMS320, WiFi, DSP, point to point / multipoint

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/NWZxhnA4zp6y