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The Third International Conference on Innovation in Engineering and Vocational Education (ICIEVE 2019)

Event starts on 2019.11.26 for 1 days in Bandung Barat

http://icieve.conference.upi.edu/2019 | https://ifory.id/conf-abstract/HqEbRy7gd

Page 3 (data 61 to 90 of 482) | Displayed ini 30 data/page

Breakthrough Curve investigation for analysing effectiveness of CO2 adsorption using K2CO3 in fixed bed column
Lidya Elizabeth, Heriyanto, Husna Immah and Kemuning Aqshanrilyan

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Corresponding Author
lidya elizabeth

Institutions
Chemical Engineering Department, Politeknik Negeri Bandung

Abstract
Carbon dioxide contributed great amount of Green House Gas (GHG) emission. Solid adsorption is one of the way to ease carbon dioxide emission. The effectiveness of CO2 adsorption by solid K2CO3/rice husk in fixed bed column by evaluated adsorption capacity, breakpoint time and length of effective bed height/HB were investigated. K2CO3 used as adsorbent and rice husk as support. The K2CO3 adsorption occurred at fixed bed column under mild condition. The CO2 inlet and outlet concentration were analysed by acid-base titration. The highest adsorption capacity by K2CO3/rice husk is 0.2 mmol/g adsorbent at CO2 inlet flow rate 28 LPM with 50 gr K2CO3. Meanwhile, the highest breakpoint time is 685.5 second which at CO2 flow rate 15.9 LPM and K2CO3 adsorbent 50 gr. Perhaps, variation of CO2 flow rate and amount of adsorbent do not affect CO2 adsorption capacity significantly.

Keywords
solid adsorption, K2CO3, breakthrough curves, adsorption capacity

Topic
Chemical Engineering

Link: https://ifory.id/abstract/6NRvFP9WraXQ


Bringing Google to Classrooms: The Application of Blended Learning in Software Application and Building Interior Design Subject
Tri Wahyu Wijayanti, Tutin Aryanti, Riskha Mardiana

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Corresponding Author
Tutin Aryanti

Institutions
Universitas Pendidikan Indonesia

Abstract
Industrial Revolution 4.0 requires teachers and students to be responsive to technology to support innovative learning processes. One of the ways that can be done is implementing blended learning method. Blended learning method has several advantages through combining the discussion, lecture, question and answer method with online-offline method. This research aims to determine student-s learning outcomes improvement and responses after the implementation of blended learning methods in Software Application and Building Interior Design subject in a vocational high school. This research used a quantitative method in the form of Pre-Experimental Design (Nondesigns) with the type of Pretest-Posttest Design. There were 25 students who were selected purposively as the samples in experimental class. Data analysis is obtained from N-Gain calculation. The analysis results show that the implementation of blended learning shows good psychomotor achievement. Additionally, there is a medium increase in the psychomotor aspect after using the blended learning method in Software Application and Building Interior Design subject. Students gave good responses to blended learning method on Software Application and Building Interior Design subject.

Keywords
blended learning, vocational school, google classroom

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/46YaJPcdMnjX


BUILDING GRADUATES CAPACITY THROUGH THE DEVELOPMENT OF PROFESSIONAL CERTIFICATION
Aam Hamdani, Lilis Widaningsih, Elih Mulyana, Heni Mulyani

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Corresponding Author
Aam Hamdani

Institutions
UNIVERSITAS PENDIDIKAN INDONESIA

Abstract
One of the challenges in the workforce and industry for educational institutions is the recognition of competency of graduates who have competitiveness. Certification of expertise is a prerequisite that can demonstrate the capacity and competencies of graduates who will enter the workforce. This paper aims to analyze the direction of developing professional certification to build the capacity of highly competitive graduates. The method used is descriptive qualitative, data collection through direct observation, semi-structured interviews, documentation, and Focus Group Discussion. Data analysis techniques used are domain analysis, taxonomic, componential analysis, and theme analysis as a process of interpretation, by thoroughly describing and displaying the meaning of the objects that are the focus of research. The results show that to increase capacity, graduates must be equipped with competencies that are tested and certified in accordance with their scientific and professional fields through competency testing of students by professional certification bodies at universities. Capacity building is carried out through a tiered process designed in an integrated learning curriculum with the needs of specific expertise competencies according to the Indonesian National Competency Framework (KKNI). Higher education through the Professional Certification Institute (LSP1) can become an independent institution that serves the assessment/competency test for students.

Keywords
graduates capacity, certification body, professional certification

Topic
Research and Development in Engineering Education

Link: https://ifory.id/abstract/RT3pWAz9Nv78


Building Students- Creativity in Producing Creative Products through Developing Project-based Three Key Skills on School Chemistry Practicum
Wawan Wahyu, Tuszie Widhianti

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Corresponding Author
Wawan Wahyu

Institutions
Universitas Pendidikan Indonesia

Abstract
This study was designed to investigate the effectiveness of School Chemistry Practicum through developing Project-based Three Key Skills to build students- creativity on making Creative Products made from natural materials. This research used descriptive method. Data collection was carried out using assesment rubric of Creative Products and student testimonial sheets. The results showed that students- creativity were successfully built through learning using the development of Project-based Three Key Skills. This model facilitated students to construct their knowledge then made product based on that knowledge and finally discussed and evaluated the product. It showed that the Project-based Three Key Skills developed on School Chemistry Practicum was very potential to be applied in learning process to stimulate student creativity.

Keywords
Project-based Three Key Skills, Creative Products, School Chemistry Practicum

Topic
New Technologies in Education

Link: https://ifory.id/abstract/D3vJndRZGQ7K


Calculation of neutronic parameter design for MTR reactor core using safety control rods
Tukiran S., Surian P., Lily S. Farisy Y.

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Corresponding Author
Tukiran. Surbakti

Institutions
Center for Nuclear Reactor Technology and Safety, BATAN,
Kawasan PUSPIPTEK Gd. No. 80 Serpong, Tangerang Selatan, 15310 Indonesia

Abstract
Indonesia has three research reactors which already old. So it is necessary to design new reactor core which is a compact core design, MTR type, utilizing low enriched uranium molybdenum dispersion fuel of high density. Optimization of neutron fluxes in irradiation positions is of great concern in research reactor design. The general approach used at the MTR reactor core for neutron flux optimization in irradiation position is presented. The approach is essentially based upon a optimization of the core configuration combined with the improvement of fuel characteristics. This simulation study was conducted by employing the standard reactor physics simulation codes WIMSD-5B and BATAN-FUEL. The present study is to analyze the effect of core configuration with the safety control rods and neutronic parameter by calculation using diffusion code. The MTR core consists of 16 fuel elements and 4 control rods put in 5 x 5 position of grids plate and by loading reflector elements outside the core. The aim of this research is to get the optimal design such as the highest neutron fluxes at the central flux trap position and also at irradiation positions in the core. Fuel cycle length of this core also becomes a concern, it is not less than 20 days and this core can be operated safely at the power of 50 MW. The result of calculation showed that for the lowest loading of fuel namely 450 gram of U7Mo/Al fuel with D2O as a reflector would provide higher neutron flux in center irradiation position of the MTR core namely 1.072 x1015 n/cm2s. Fuel cycle length of this core will reach 21 days, it meets the acceptance criteria and it will require less negative reactivity of control rods for its safe operation at 50 MW compare to other density

Keywords
Neutron flux, MTR reserach reactor , U7Mo/Al fuel, WIMSD-5B code , BATAN-FUEL code

Topic
Basic Science in Engineering Education

Link: https://ifory.id/abstract/2B9FGtManK3z


Causes of delays in construction project for developing Southeast Asia countries
(1) Hans Deni Wuala (2) Ayomi Dita Rarasati

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Corresponding Author
Hans Deni Wuala

Institutions
Universitas Indonesia

Abstract
Delay in construction industry impact the time and cost of project and mostly being the basis of dispute between stakeholders of the project. To reduce the impact, knowing the causal factors and lesson learned from past projects and studies is essential. Through this study, a literature review on the subject of construction delay factors studied in Indonesia, Malaysia, Thailand and Vietnam was undertaken to identify top factors and to determine whether there are special causes referring to this region. A comparison was made to a similar study on developed economies in Europe and North America. The result of the study revealed that the most significant factors causing delays in the Southeast Asia developing countries were related to contractor (material shortages, improper/ ineffective planning, poor site management and supervision, and equipment shortage and failure), and owner-related causes (financial/ payment issue and design change/ variation order). The results of the study support the view that contractors handling projects in developing countries are dealing with the shortages problems, inefficiency/ incompetence of the contractor, and problems caused by clients.

Keywords
Causes of delays, delay factors, Southeast Asia, developing economy

Topic
Civil Engineering

Link: https://ifory.id/abstract/zUKXtxnMk8qJ


Characteristic Study of Biodiesel Mixtures from Used Oil and Diesel Oil
Haris Numan Aulia, Faqih Nur Hidayat, Tun Sriana

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Corresponding Author
Haris Numan Aulia

Institutions
Politeknik Energi dan Mineral (PEM) Akamigas Cepu

Abstract
Biodiesel is an alternative fuel for diesel engines. Used cooking oil is blended with diesel with a certain volume ratio to improve the characteristics. The characteristics of biodiesel can not be fully used by diesel engines because it doesn-t meet the standards so that its characteristics need to be improved. As for utilizing it, it must be blended with diesel oil. The purpose of this study is to improve the physical and chemical properties of biodiesel, knowing the percentage of biodiesel volume from used cooking oil with diesel oil so that it can be known the optimal ratio of biodiesel with diesel oil which is close to diesel fuel specifications. Characteristics as variables in this paper are density, kinematic viscosity, pour point, and flash point of the specified mixture. The results show that the kinematic viscosity and density of the biodiesel-diesel mixture increase as the biodiesel mixture increases. Mixtures with higher biodiesel content have higher flash points. Mixing diesel with used cooking oil biodiesel may be of no use compared to diesel, but it can help in adjusting the viscosity, density, pour point, and flash point values according to applicable regulations

Keywords
biodiesel, used cooking oil, blends

Topic
Chemical Engineering

Link: https://ifory.id/abstract/HVYfmN3PpqEh


Characteristics of Asphalt Concrete-Wearing Course (Ac-Wc) Mixing Using Concrete Waste as a Coarse Aggregate and Wetfix-Be Addition
R. Desutama Rachmat Bugi Prayogo*, Suherman, Nailil Khairini

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Corresponding Author
Nailil Khairini

Institutions
Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ciwaruga, Kec. Parongpong, Kabupaten Bandung Barat, Jawa Barat 40559
*de.prayogo.sipil[at]polban.ac.id

Abstract
The increasing availability of aggregates as road pavement materials and road pavement forming materials are increasingly limited in numbers shown by the dredging of rivers and cliffs in the mountains. Thus, other materials are used, namely concrete waste originating from the residual compressive strength test of concrete as a substitute for coarse aggregate that is obtained easily and cheaply to overcome the increasingly reduced availability of natural aggregates in Indonesia and one of environmental preservation system. The shortage of concrete waste has a high absorption, so to overcome it is needed additional substances in the form of Wetfix-Be. Laboratory-scale experimental testing method is testing Marshall characteristics using the proportion of concrete waste and crushed stone that is 0/100, 40/60, 80/20, 100/0. For Wetfix-Be levels used are 0%, 0.15%, 0.25%, 0.35%, of the weight of asphalt. The results of the study using concrete waste and Wetfix-Be as an aggregate and asphalt mixture can improve the quality of the flexible pavement layers in the AC-WC (Asphalt Concrete Wearing Coarse) mixture so as to reduce waste in the form of concrete residues in Indonesia.

Keywords
Concrete Waste, Wetfix-Be, Asphalt Concrete Wearing Coarse.

Topic
Civil Engineering

Link: https://ifory.id/abstract/48qUpyCBjDh2


Chatter detection in turning by using sound signal and simple microphone
Feblil Huda1, Darman1, and Meifal Rusli2

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Corresponding Author
Feblil Huda

Institutions
1Department of Mechanical Engineering, University of Riau,
2Department of Mechanical Engineering, Andalas University,

Abstract
Chatter is frequently problem experienced in the area of machining process which brings down machining productivity and surface quality. Therefore, reliable and intense chatter detection methods are needed to maintain machining quality. In this study, turning chatter detection approach by using sound signal and simple microphone is proposed to get an accurate, simple and low cost detection method. For that purpose, an experimental set-up which consist of operating turning machine, simple microphone and personal computer (PC) with sound card is arranged. The chatter in turning process is stimulated by applying an artificial wear to the cutting tool. The sound signal data from normal and with chatter turning process are then grabbed by simple microphone and PC with sound card. The sound signals are then evaluated by Fast Fourier Transfom (FFT) and Wavelet Transform (WT) for normal and chatter conditions. Both of conditions data are then compared to get the characteristic of sound signal in chatter. It is found that signals in frequency domain, time-frequency and spectrogram have significant magnitude spike in chatter condition. 3-D spectrogram exhibits a special contours which signs the existence of chatter. The results demonstrate that the proposed method can conscientiously identify the chatter.

Keywords
Chatter detection; Sound signal; Simple microphone; Fast Fourier Transform; Wavelet Transform

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/QHRvnXr6cxWL


CIPP Evaluation Learning Development Model in ISO: 2008 based Vocational Laboratory
Mukhidin, Iwan Kustiawan, Tuti Suartini, Bachtiar Hasan, Aan Sukandar

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Corresponding Author
mukhidin mukhidin

Institutions
UPI

Abstract
The purpose of this study was to develop an evaluation of the CIPP model on the implementation of Learning Models in ISO 9001: 2008-based Vocational Schools. This research uses quantitative methods. CIPP uses 4 dimensions of instruments that are applied to West Java Vocational Schools (SMK). The validity of the test and the reliability of the test are used with correlation techniques. The results of the evaluation of this model show that the evaluation model of ISO 9001: 2008 based learning can be used in Vocational High Schools.

Keywords
CIPP Model, ISO 9001: 2008 based Learning Model

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/4y2WNnxwPrgU


Classification and Compilation of the Creative Economy Database in Bekasi Regency
Irland Fardani, Ina Helena Agustina, Muhammad Alif Dilyan Yulindra

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Corresponding Author
Irland Fardani

Institutions
Bandung Islamic University

Abstract
Creativity is the main capital in facing global challenges. In developing the creative economy, required a number of qualified Human Resources (HR) with innovative power and high creativity. But in its implementation, in many region they do not have a database that contain the potential of this creative economy. This study aims to compile a database of creative economic distribution related to tourism activities in Bekasi Regency. The first step was to classify the potential of the existing creative economy and then design the application that could accommodate the potential of the creative economy. From the results of the study it appears that in Bekasi district the most dominant subsector is the culinary sub sector and if we see from the distribution of existing districts, Cikarang subdistrict has the most creative economic potential among other districts.

Keywords
Creative, Economy, Database

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/48PXBCdfynep


COAL QUALITY CONTROL FROM PIT TO STOCKPILE
L Pulungan, V Arbianto *

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Corresponding Author
Linda Pulungan

Institutions
Faculty of Engineering, Bandung Islamic University
*) linda.lindahas[at]unisba.ac.id

Abstract
In general, coal quality parameters used are calories, moisture content, volatile matter, ash content, carbon content, sulfur content, size, etc. At the research location, there are 4 seams, including seam A1, seam A2, seam B and seam C. The next discussion is focused on mining activities seam C divided into 3 layers of coal stripping, namely layer 1, layer 2, and layer 3 with thickness each 2 meters each. In seam C identified 2 clay partings, with thickness 10 cm on layer 1 and 20 cm on layer 2. Based on the coal classification table for trade, the percentage change in the quality of coal from mining that shows a significant change is the ash content. The percentage change in ash content for each layer, 112.1%, 106% and 114%. The percentage change in ash content exceeds the range 37.5 - 60% (classified in the medium ash ). Efforts to mitigate changes in the quality of coal from mining are the implementation of selective mining by taking into account when mining the transition zone of the layer between the over burden layer and coal, separating the quality of different coal, and coal washing studies, to improve coal quality

Keywords
Coal Quality, seam, steam coal, ash content

Topic
Mining Engineering

Link: https://ifory.id/abstract/xLyj2JvfNuhZ


Combination of PLA-ZnO Nanocomposite for Antimicrobial Packaging Application
Ridwan(1*), Teuku Rihayat(1), Suryani(1), Adi Saputra Ismi(2), Nurhanifa(1) and Shafira Riskina(1)

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Corresponding Author
Ridwan Ridwan

Institutions
(1*)Departement of Chemical Engineering, Politeknik Negeri Lhokseumawe,
Jl. Banda Aceh-Medan Km.280,3, Buketrata, Lhokseumawe 24301
Phone/Fax : (0645)42670
(2)Departement of Mechanical Engineering, Politeknik Negeri Lhokseumawe,
Jl. Banda Aceh-Medan Km.280,3, Buketrata, Lhokseumawe 24301
*ridwan.kimia[at]pnl.ac.id

Abstract
Many food packages (plastic wrappers) today cannot be broken down by the environment. therefore, it is necessary to add natural substances that can make the food package decompose and be resistant to contamination with bacteria. Poly lactic acid (PLA) is one of the natural polymers produced by several bacteria that grow in crops rich in carbohydrates (such as sugar beets, corn and others). This research aims to insert ZnO nanoparticles and chitosan into a plastic layer of PLA (poly lactic acid) which can improve the antibacterial properties of the resulting packaging. The method used in making PLA-ZnO-chitosan Nano composite is the precipitation method and the heating method. PLA-ZnO Nano composites were obtained by varying ZnO nanoparticles 0.5% by weight, 2% by weight, and 3.5% by weight. The results obtained in SEM images show that nanoparticles are homogeneously distributed on the plastic surface. Antimicrobial tests show nanocomposites work effectively in deactivating E. coli and S. aureus. where it was found that E. coli was more susceptible to this type of nanocomposite, where there was a reduction of 3.4 logs to 3.5% ZnO loading in the PLA layer

Keywords
PLA, ZnO, food packaging, Nanocomposite, Antimicrobial

Topic
Material Engineering

Link: https://ifory.id/abstract/M42UxKRwuXca


Comparative Space of the Kanoman Palace and Kacirebonan Palace, Indonesia
Ina Helena Agustina; Astri Mutia Ekasari; Irland Fardani;Hilwati Hindersah; M. Alfan Alfan Syahzidan

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Corresponding Author
Ina Helena Agustina

Institutions
Department Of Urban and Regional Planning – Faculty Of Engineering, UNISBA

Abstract
Kanoman Palace and Kacirebonan Palace still show their existence. The form of existence is demonstrated through the existence of palace building, the king, and all of its activities. Although both are palace space, but there are differences in the composition of the space. This difference needs to be shown as a knowledge of a palace space. The purpose of this paper is to describe the arrangement of spaces and patterns of micro and meso spaces for the Kanoman Palace and Kacirebonan Palace. Approach methods used is a comparative techniques for or the two palace maps. The map was obtained from aerial photographs using drones, then became a two-dimensional map. The spatial arrangement and the spatial patterns were obtained from the results of field research and previous research reports. Furthermore, the similarities and differences within the spaces were grouped and interpreted. The result of this research can be the findings of knowledge about the micro and meso spatial arrangement and pattern of a palace, thus it can be an input for policy of the heritage of the palaces in Cirebon.

Keywords
Comparative; Meso-space; Micro-space; Kanoman-Palace; Kacirebonan-Palace

Topic
Architecture

Link: https://ifory.id/abstract/j3fcKnTyNqGM


Comparative Study of Pressure Ulcer classification based on Braden scale in the Community-Dwelling Older Adults
Desri Kristina (a*), Husneni Mukhtar (b), Sheizi Prista Sari (c), Eka Afrima Sari (d)

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Corresponding Author
Desri Silalahi

Institutions
a, b) Fakultas Teknik Elektro Telkom University, Bandung, Indonesia
c, d) Fakultas Ilmu Keperawatan Universitas Padjadjaran, Bandung, Indonesia

Abstract
A problem that is often found in the elderly is pressure ulcers cause decreased quality of life elderly. One way to recognize the risk of pressure ulcer by Braden Scale analysis. Braden Scale has been tested with the level of reliability and validity with various types of hospitals and patients. The purpose of this research is to compare several classification methods to classify pressure ulcers in dataset. The classification methods used are Logistic Regression, Quadratic Discriminant Analysis, K Nearest Neighbor, Support Vector Machine, Naive Bayes, Gaussian Process Classifier and Multi-Layer Perceptron Classifier. The method used to evaluate performance or algorithm is k-fold cross validation with k=10.Based on the analysis results obtained that Quadratic Discriminant Analysis produces the highest accuracy, with an accuracy rate is 94.12%.

Keywords
Classification; Machine learning; Pressure ulcer, Quadratic discriminant analysis

Topic
Computers, Internet, Multimedia in Engineering Education

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


Comparison of Community of Inquiry Application in Collaborative Learning and Free Discussion Learning for a Soil Mechanics Class
Titi Sari Nurul Rachmawati (1,3*), Cindy Rianti Priadi (2,3), Fathiyah Hakim Sagitaningrum (1,3), Bhidara Swantika (1,3), Aulia Qisthi Mairizal (2,3), Kasiyah Junus (4)

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Corresponding Author
Fathiyah Hakim Sagitaningrum

Institutions
1) Civil Engineering Program, Civil Engineering Department, Universitas Indonesia, Depok 16424 Indonesia
* titisari.nurul[at]gmail.com
2) Environmental Engineering Program, Civil Engineering Department, Universitas Indonesia, Depok 16424 Indonesia
3) Engineering Education Working Group, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
d) Faculty of Computer Science, Universitas Indonesia, Depok 16424 Indonesia

Abstract
It was known that utilizing online discussion forum had an effect in increasing the understanding of the students of the class. To analyze the online learning experience, the Community of Inquiry (CoI) model is proposed. The CoI model divides the dynamics online learning process as social presence, teaching presence, and cognitive presence. This study aims to compare the application of CoI in Soil Mechanics course under the Civil Engineering Department at a large public university in Indonesia. The students of Soil Mechanics course were given a problem-based online discussion with two different types of discussion for two materials. The first one was a case study of Consolidation Settlement in a Collaborative Learning while the second one was a case study of Seepage case in a Free Discussion. Through quantitative analysis of the students- discussion transcript, it was found that cognitive and teaching presence were higher than social presence. Finally, through interview to students, it was found that students with active participation had better understanding and grades compared to passive students.

Keywords
civil engineering courses, community of inquiry, online discussion forum, problem based learning, soil mechanics

Topic
Engineering Education Research

Link: https://ifory.id/abstract/g8Bk3fRQ46Fy


Comparison of Rowe Cell and Oedometer Test to Determine Peat Soil Consolidation Parameters
Mulyadi Yuswandono (a), Andri Krisnandi Somantri (b), Rabiya (c*)

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Corresponding Author
Rabiya

Institutions
(a) Polytechnic State of Bandung
Jalan Gegerkalong hilir, Ds. Ciwaruga, Kec Parongpong, bandung 40559, Indonesia
yuswandono[at]polban.ac.id
yuswandono[at]gmail.com
(b) Polytechnic State of Bandung
Jalan Gegerkalong hilir, Ds. Ciwaruga, Kec Parongpong, bandung 40559, Indonesia
andri_krisnandi[at]polban.ac.id
(c*) Polytechnic State of Bandung
Jalan Gegerkalong hilir, Ds. Ciwaruga, Kec Parongpong, bandung 40559, Indonesia
rabiya86[at]yahoo.co.id
rabiyabia91[at]gmail.com

Abstract
Many problems occur when building infrastructure on peat soil. That problem is large settlement. To know large settlement can do the testing. The consolidation test it consist of testing using a row cell and oedometer. The advantages of the two tools are different. This cell rowe tool can knowing the saturation value of sampling. Loading on this test with hydrostatic pressure. While oedometer can not knowing the value of saturation, but the loading used can be static and cyclic loads. In this research take the sample used in Rawa Pening. The type of soil used in this area is peat soils. From the results of the research obtained the value of soil ability (Cc) and the coefficient of speed consolidation (Cv). In testing with rowe cell, the average soil Cc value was 0.50 and the Cv value was 167.99 cm2 per minute. Average soil pore cavity (e) of 14.81. Whereas in the evaluation with an oedometer, the soil Cc value was 0,65 and the Cv value was 183.90 cm2 per minute. The average soil pore cavity (e) is 10.83. From the results of testing prove a greater density index with rowe cell test.

Keywords
Peat soil; rowe cell; oedometer; large settlement; consolidation on peat soil

Topic
Civil Engineering

Link: https://ifory.id/abstract/nWFe6TpHcdhX


COMPARISON OF VS, CPT and SPT FOR LIQUEFACTION ASSESMENT IN PALU
Hanif Audina Rahmawati (a*), WIdjojo A. Prakoso (a)

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Corresponding Author
Hanif Audina Rahmawati

Institutions
Civil Engineering Departemen, University of Indonesia
Kampus UI Depok
hanif.audina81[at]ui.ac.id

Abstract
Palu-s earthquake was happened on September 28, 2018, provided the liquefaction hazard. Liquefaction was evaluated by shear wave velocity (Vs) obtained from the average Vs that occur along 30 meters. Not only Vs, but qu or end resistance also, obtained from the CPT Test. And the last is N-SPT. The highest value that influences the occurrence of liquefaction is the value of qu. This is because the CPT test has only a few error factors which are only in the form of conus, while the others are SPT in the amount of hammer, high distance of the fall, sampling technique. Whereas Vs, the shear wave data processing and calculation processes are on average Vs30 or AVS30.

Keywords
Liquefaction, Vs, qn, SPT

Topic
Civil Engineering

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


Competencies Needed by Civil Engineering Teachers in the Digital Era
R E R Surya*;B Mulyanti;I Widiaty

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Corresponding Author
R. Ergy Rangga Surya

Institutions
Universitas Pendidikan Indonesia
*Ergyrangga90[at]gmail.com

Abstract
This study aims to obtain information about teacher competencies needed to support learning in the digital era. The analytical method used is the study of literature by collecting journals related to the research objectives of 30 journals from 2015-2019. The data obtained is compiled, analyzed and concluded. Data is categorized into competencies in technology adaptation, operating technology tools, and operating technology applications in learning. The findings of the analysis show that the teachers competence in adapting to new technology, operating tools such as computers or laptops, mobile phones, cameras, and the teachers ability to operate applications such as Social Networking Service (SNS) or Social Media, Video Editor, Browser, Blogs and Applications Presentations are needed in the digital era.

Keywords
digital teacher, online teacher, digital era

Topic
Engineering Education Research

Link: https://ifory.id/abstract/JzbF2TYwcXCW


Compressive Strength and Permeability of Concrete by Using GGBFS Against Sea Water
Aceng Subagja*, Ahmad Sofyan, Achmad Rusmanto

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Corresponding Author
Achmad Rusmanto

Institutions
Department of Civil Engineering State Polytechnic of Bandung, Jl. Gegerkalong Hilir, Ciwaruga, Kec. Parongpong, Kabupaten Bandung Barat, Jawa Barat 40559, Indonesia
*sbagdja[at]yahoo.co.id

Abstract
One of the causes of cracked reinforced concrete in the seawater environment is direct contact between concrete and sea water. This is because cement as a binding material in concrete does not have a good ability to withstand corrosive conditions in seawater. Ground Granulated Blast Furnace Slag (GGBFS) which in this case is B3 waste can be a solution. From several studies conducted previously, the behavior of GGBFS concrete against sulfate and chloride attacks showed positive results but relatively little is known about GGBFS material produced by steel mills in Indonesia. Therefore, an experimental study of the characteristics of compressive strength and permeability test using GGBFS (0%, 20%, 30%, 40%, 50%, and 60%) with 72 concrete cylinder in 28 and 40 days. Microstructure of GGBFS concrete test using Scanning Electron Microscopy (SEM) was also studied. The result of this experimental study is GGBFS microstructure, compressive strength and concrete permeability for better effectiveness concrete in seawater, so that it can become one of the alternative solutions for infrastructure development especially for seawater infrastructure in Indonesia.

Keywords
GGBFS, Compressive Strength, Permeability, Microstructure

Topic
Civil Engineering

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


Computer-Assisted Instruction based on the GCC concept in the English subject for vocational students
Y Phatsanan1, 2 and S Thosporn1, 3

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Corresponding Author
Phatsanan Yanasoot

Institutions
1 Department of Educational Technology and Communication, Faculty of Technical Education, Rajamangala University of Technology Thanyaburi, Pathumthani 12110 Thailand
2 phatsanan_y[at]mail.rmutt.ac.th
3 sthosporn[at]rmutt.ac.th

Abstract
The aims of the research were to: 1) find the efficiency of the Computer Assisted Instruction (CAI) based on the GCC concept in English subject for vocational students., 2) the results of pre and post achievement test of students learning from the CAI., and 3) find the satisfaction of vocational students taking the CAI. The subjects of this research were 30 vocational students taking English subjects in the first semester of the academic year 2017 at Saraburi Technical College. The research instruments were the CAI for vocational students, pre-test and post-test, and a satisfaction questionnaire. The statistics used for data analysis were percentage, mean, standard deviation, and t-test for a dependent sample. The result of the study showed that the CAI had an efficiency of 81.67/80.33. The achievement of the students before learning with the CAI for vocational students was 8.03, and the standard deviation value was 1.00. The average scores after learning with the CAI for vocational students were 24.50, and the standard deviation value was 2.75 t-test value between before and after learning was 16.47, and it was significantly different at the 0.05 level. The satisfaction of the vocational students toward the CAI was at a high level.

Keywords
Computer Assisted Instruction, English, GCC concept

Topic
New Technologies in Education

Link: https://ifory.id/abstract/gP9rADXu6Gd8


Conceptual Model of Strategy Structure in Accelerating Industry 4.0 Readiness in Small Medium Industry in Indonesia
Risma Fattahatin Muizzullah, Komarudin, Akhmad Hidayatno

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Corresponding Author
Risma Fattahatin Muizzullah

Institutions
Industrial Engineering Department, Faculty of Engineering
Universitas Indonesia
Depok, Indonesia

Abstract
Industry 4.0 becomes global trend for world government, it is because not only affected to manufactures increasing the productivity but also to social economics and education. Small Medium Industry (SMI) is the largest number of industries and one of the backbones in Indonesias economy, but they are slow in adopting the technology, so it is considered irrelevant to industry 4.0. This paper analyzes the SMI readiness index in industry 4.0. The readiness results is simulated in the model to provide policy alternatives for the government to implement industry 4.0 in SMI.

Keywords
Industry 4.0, readiness, system dynamic, Small Medium Industry

Topic
Industrial Engineering

Link: https://ifory.id/abstract/mMNdxYbA4WPL


Constrains and efforts for improving sanitation access in Bandung City
Tarlani1, Halimah Nurhasanah2, Alvina Tania Destiani3

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Corresponding Author
Tarlani Tarlani

Institutions
Bandung Islamic University

Abstract
Urban societys health is directly affected by environmental factors where the quality of the environment is decided by the development of urban infrastructure. Exponential growth of population in Metropolitan Cities without being matched by basic sanitation supplies will raise the deteriorating environmental conditions. Bandung metropolitan city has a high level of urbanization so that the problem of basic sanitation supply is more important. This study aims to identify sanitation problems and efforts to improve access to basic sanitation in Bandung city. This research method uses a deductive approach with quantitative and qualitative mixed analysis methods. The use of data in this study uses secondary data from the past 5 years. Our initial synthesis shows that the main problems of access to basic sanitation in Bandung are caused by technical constraints in the form of lack of suitable land and limited access to the PDAM sewer, while non-technical constraints in the form of readiness and understanding of local urban society, and budgeting. The efforts of Bandung city are currently quite massive, but the improvement of sanitation access is still not significant.

Keywords
Environment, Metropolitan, Sanitation, Urban Society

Topic
Environmental Engineering

Link: https://ifory.id/abstract/L2UFrByAe9Tz


Contribution Succinonitrile additive for Performa Solid Polymer Electrolytes Li-Ion Battery
Qolby Sabrina, Titik Lestariningsih , and Christin R Ratri

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Corresponding Author
Qolby Sabrina

Institutions
Research Centre for Physics, Indonesian Institute of Sciences
Kawasan Puspiptek Serpong Gd. 442 Tangerang Selatan, Banten 15314, Indonesia

Abstract
Solid polymer electrolyte (SPE) appropriate to solve packaging leakage and expansion volume in lithium-ion battery systems. Evaluation of electrochemical performance of SPE consisted of mixture lithium salt, solid plasticizer, and polymer precursor with different ratio. Impedance spectroscopy was used to investigate ionic conduction and dielectric response lithium bis(trifluoromethane)sulfony imide (LiTFSI) salt, and additive succinonitrile (SCN) plasticizer. The result showing enhanced high ionic conductivity. In half-cell configurations, wide electrochemical stability window of the SPE has been tested. Have stability window at room temperature, indicating great potential of SPE for application in lithium ion batteries. Additive SCN contribute to forming pores that make it easier for the li ion to move from the anode to the cathode and vice versa for better perform SPE. Pore of SPE has been charaterization with FE-SEM. Additive 5% w.t SCN shows the best ionic conductivity with 4.2 volt wide stability window and pretty much invisible pores.

Keywords
Solid polymer electrolyte, ionic conductivity, succinonitrile, electrochemical, lithium-ion battery

Topic
Material Engineering

Link: https://ifory.id/abstract/BervZ4WnbLhz


Control of Aluminum Corrosion in Seawater Environment by Adding Turmeric Extract to the Coating Material
Heriyanto*, Ayu Permana Sari, Arya Wibisono, Servio Galih Purnomoaji

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Corresponding Author
Heriyanto Heriyanto

Institutions
Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Ciwaruga, Bandung 40551, Indonesia
* heriyanto[at]polban.ac.id

Abstract
Turmeric is one of the plants that contains antioxidant compounds called curcumin. Antioxidants in curcumin include flavonoids and tannins. Antioxidants can be used as corrosion inhibitors and paint additives. This study aims to utilize turmeric extract as an inhibitor and additive coating agent for aluminum metal in the seawater environment. Turmeric is extracted using a methanol or acetone solvent with a sample: solvent ratio of 1: 8. Phytochemical and DPPH (1,1-Diphenyl-2-Picrylhydrazyl) analyzes were performed. Testing of extracts as inhibitors and coating additives was carried out by varying the concentration and time of corroding. The results showed that the extract produced contained flavonoids and tannins through qualitative tests using 1% FeCl3 and 10% NaOH, each of which gave a blackish green and a blackish red color. Antioxidant activity was tested by the DPPH method in acetone and methanol, which respectively showed 4509 ppm and 2057 ppm. The testing of turmeric extract as a coating additive was immersed for five days and obtained the best level of 1% which produced the lowest corrosion rate of 0.0228 mmpy with a protection efficiency of 68.60%. Turmeric extract corrosion test as a coating additive was achieved within eight days with a corrosion rate of 0.0011 mmpy and a protection efficiency of 88.89%.

Keywords
turmeric extract, corrosion inhibitors, coating additives, aluminum metal, water the sea

Topic
Chemical Engineering

Link: https://ifory.id/abstract/AgTzQjxGc3eZ


Control of AX12 Servo Motor Current Control of Gripper Arm Robot Based on Microcontroller
Kartono Wijayanto

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Corresponding Author
Kartono Wijayanto

Institutions
Politeknik Negeri Bandung

Abstract
Application of automation technology using robots, especially robot arms in various industries such as industry (painting and welding), beverage industry (storage) and others has been able to improve the quality, precision and speed of production. At present the implementation of robotic arms is increasingly widespread and is used as a food and beverage waiter. The working system of the robotic arm in placing the holder in a specific destination or position is used by motors as electrical drive for each joint. Motor work is based on programs embedded in the micro controller. The dynamics of robot arm motion are based on backward or forward kinematics information methods. In this research, we will discuss the AX12A motor control of gripper robot arm so that it can hold the work piece or specimen at a certain level of hardness and weight in accordance with the ability of the motor. Dynamixel AX12A motor hall effect current sensor module which is fed to the controller and then processed using the Tsugeno Fuzzy Logic algorithm. The controller output signal will control the AX12A motor. The results obtained are in line with the expectation that the robotic arm gripper manages to hold specimen objects properly and in accordance with the setpoint given to rubber ball, chicken eggs, and chips specimens.

Keywords
Gripper, motor AX12, Fuzzy logic, Microcontroller

Topic
Electrical Engineering

Link: https://ifory.id/abstract/bnRZMC8rYpmJ


Control System Design of Arc Welding by Hand Machine Based on Programmable Logic Controller (PLC) and CC-link Master Module
Syahril Ardi, Fitria Ajeng Diana

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Corresponding Author
Syahril Ardi

Institutions
Mechatronics Department, Politeknik Manufaktur Astra, Jakarta, Indonesia

Abstract
This paper presents research conducted at an automotive manufacturing company that manufactures automotive components, including the rear axle. Housing assembly is one part of the rear axle assembly process that serves as a place to put other rear axle components, namely: axle shaft, differential, inner retainer bearings, brakes, drum brakes, and others. A new machine will be designed on the housing assembly production line with a larger capacity, which is 3000 pcs per month. The arc welding by hand machine was design by adding a motor and an inverter, a pneumatic cylinder as a gripping, a reed switch as a controlling cylinder. The main function of this machine is to connect the upper-lower assembly parts with the housing tube and housing end, and to keep the three parts fixed on one axis. If the three connected parts are not on the same axis, it can cause defects in the product. In this paper, we discuss control system design of the housing assembly arc welding by hand machine using the PLC as its control, and the CC-Link master module which functions as the expand input - output of this machine. With a new machine control design, production targets can be achieved, and product defects have decreased from 0.96% to 0.06%.

Keywords
Arc welding by hand machine; rear axle; PLC; CC-link Master Module

Topic
Electrical Engineering

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


Course Design Based On Students English Skill Cluster: A Case Study In A University Language Center
Eldwin Ilham Murpratomo, Amelia Kurniawati*, Hilman Dwi Anggana

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Corresponding Author
Amelia Kurniawati

Institutions
Department of Industrial Engineering, Telkom University
Jl. Telekomunikasi No. 1, Bandung 40257, Indonesia
*ameliakurniawati[at]telkomuniversity.ac.id

Abstract
The English Proficiency Test (EPrT) is a prediction test for English as a Foreign Language (TOEFL), which is a prerequisite for graduation at XYZ University. The Language Center (LaC) provides a course for EPrT preparation. The course post-test data shows that only 74% of students met the graduation prerequisites. This study aims to develop an English course design based on the students- English skill cluster. This study uses K-Means clustering approach to classify the students based on English skill. The respondents of this study are 397 students who joined the EPrT preparation course in October and November 2018. The 397 students are distributed into 3 clusters, which are 174 students in cluster 1, 116 students in cluster 2, and 107 students in cluster 3. Cluster 1 consists of students with low EPrT score, especially in listening score. Cluster 2 consists of students with moderate EPrT score but low grammar score. Cluster 2 consists of students with high EPrT score in all listening, grammar, and reading scores. Therefore, the EPrT preparation course is suggested to have 3 different levels, instead of 1 level as now. The course materials are designed to be suitable for students- initial English skill in each level.

Keywords
English course; K-Means clustering; University students

Topic
Engineering Education Research

Link: https://ifory.id/abstract/eV9UKj3dwRhn


Cutting tool wear analysis by using sound signal and simple microphone
Feblil Huda1, Karjuni1, and Meifal Rusli2

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Corresponding Author
Feblil Huda

Institutions
1Department of Mechanical Engineering, University of Riau
2Department of Mechanical Engineering, Andalas University

Abstract
Cutting tool is an important part in machining processes which in its operation frequently runs into wear. The wear cutting tool produces imprecise product with low quality surface, may endanger machine tool by stimulating chatter. In this study, low cost and fast analysis of the wear of cutting tool in turning and drilling processes are proposed. For that purpose, the experimental set-up which consist of operating turning and drilling machine, simple microphone and personal computer (PC) with sound card are set out. The wear of cutting tools are made by applying artificial wear. The sound data from normal and wear cutting tools of operating turning and drilling machines are recorded by using simple microphone and PC with sound card. The obtained sound signals are then analyzed in form of time and frequency domain, spectrogram by Wavelet Transform (WT). It is found that sound signals in time and frequency domain have significant rise of amplitudes in wear condition. The spectrograms exhibit the special contours which sign the existence of wear. The results demonstrate that the proposed method can analyze the cutting tool wear very well.

Keywords
Cutting tool; Turning process; Drilling process; Wear, Wavelet transform

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/HbqEBGU6wkDA


CYBER PHYSICAL SYSTEMS IN INDUSTRY
N. Kamaludin *, B. Mulyanti, and I. Widiaty

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Corresponding Author
Nurholis Kamaludin

Institutions
Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, 40 154 Bandung, West Java, Indonesia
nurholis1987[at]gmail.com

Abstract
Abstract- The Industrial Revolution 4.0 greatly affects the activity patterns of human life. Many sectors are feeling the impact of the industrial revolution 4.0, especially industry and education sectors. One of the technologies developed in the era of the Industrial Revolution 4.0, is Cyber Physical Systems (CPS). This technology that integrates communications, control, and physically through the Internet. This paper was prepared aims to determine the model and the application of Cyber Physical Systems in the industry. The method used in the preparation of this paper, by reviewing the literature in journals that are in the range of 2014 - 2019. The search results and study, there are different models and ways of working are applied Cyber Physical Systems industry. Based on the results of the study, it is hoped that alternative CPS models can be applied in the same field or developed in the education sector as learning models.

Keywords
Cyber Physical Systems, Industrial Revolution 4.0, Vocational Education, Industry

Topic
Engineering Education Research

Link: https://ifory.id/abstract/eyVYwDFMCm4h


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