bluuebunny/crossref_metadata_2025 huggingface dataset:
Retrofit propane for monitoring production process in C3 splitter in a private company in Indonesia
Authors: Dewi A K , Wadjid Y K A , Heriyanto A
Published: May 2020

In propylene products, there is still a small proportion of propane which still the impurity of the propylene. Therefore, a tool for monitoring is needed while controlling the content of impurities (propane) so that the propane content in propylene is within the permissible tolerance, a maximum of 0.4 vol%. The tool that can be used to analyze the propane content in propylene is the Online Propane which works continuously for 24 hours. Need to installation of the Online Propane. However, the installed propane often fails (downtime) caused by the inability of the oven (heater) to maintain the temperatures stability in the column at a temperature of 60 °C, so that the column is unable to separate the propylene components mixed with propane properly. Frequent down time on the causes the installed propane to be poor and unreliable. The value of reliability tests with existing data is only 60.51%, under the IEEE 1336-2000 standard. it is important to do a retrofit to improve the s performance in maintaining the quality of propylene according to the design, to facilitate the operator in monitoring the process and to facilitate technicians in performing preventive maintenance.
Microwave amplifier design using high mobility electron transistor
Authors: Sutrisno S
Published: May 2020

Microwave amplifier is a radio frequency device used for many applications in telecommunication technology such as C Band weather radar application. The microwave amplifier usually exists in transmitter section to amplify weak signal that will be delivered to antenna. This paper discusses design and fabrication of a microwave amplifier using High Mobility Electron Transistor (HMET) CGH40006P. The reason using such kind of transistor is due to its high gain and linearity. In order to achieve maximum power transfer at frequency of 5.6 GHz. The amplifier is constructed in cascade architecture using the same type of transistors. Open ended single stub matching impedance networks are applied in this design as well. Based on measurement result, power gain of 21 dB is obtained for +20 dBm input power with Voltage Standing Wave Ratio (VSWR) of 1.1 and 13 dB noise figure.
Online monitoring and data logging power quality parameters of Low Voltage Distribution Panel (LVDP) on industrial system
Authors: Setiawan B , Ronilaya F , Aji D K P , Setiawan A , Putra E S
Published: May 2020

Electrical energy is an important component in an industry, that is needed by electrical equipment / machines that exist in the industry. Currently, the majority of electrical energy is produced from fossils, almost 85% of all energy comes from fossil fuels. Therefore, efficiency application of electricity loads in industries need to be logged and analyzed. To make electricity load efficiency possible, it can be done by monitoring and logging real-time electricity loads in the industry. So that, the electrical power consumed can be analyzed. In this paper, a 3-phase electricity monitoring system is builder for Low Voltage Power Distribution (LVDP) that can be monitored anytime and anywhere via internet for the needs of electricity quality analysis. Monitoring parameters are voltage, current, real power, apparent power, power factor, IHD voltage and current, and voltage and current THD for each phase. The system uses sensor ZMPT101B to get voltage value each phase and Current Transormator (CT) to get current value each phase. Then, that sensor value calculates with Arduino and raspberry pi. Arduino to calculate real power, apparent power, and power factor. Raspberry pi to calculate IHD voltage, current and THD voltage and current. That variables send to database and display on the web. Error reading of voltage sensor is found on average error 0.00254% compared to multimeter. For current sensor, the average error is 0.0074%. On the user interface, all functions are running well including the addition of devices, as well as monitoring parameters of each phase, so that, it can be utilized for the needs of electrical analysis, which means the power consumed and the malconsumed can be known.
Feasibility analysis of DMSY cubicle in Dago Pakar substation, Indonesia, using FMEA, technical age, NPV and economic age
Authors: Azis M M A , Trisno B , Kustija J
Published: May 2020

Cubicle is used as dividers, breakers, connectors, controllers and safety of power delivery systems. Based on data of APN West Java APD asset maintenance in 2016 and 2017, it is known that there are 10171 asset anomaly. Of the total anomaly, about 4% of disorders were experienced by cubicles. Data of the cubicle disorder, the author’s main consideration to know more about the role and function of the aspect of the feasibility value. The X brand is one of the cubicle brands that often experience interference. In this research, the authors conducted a feasibility study related to the feasibility of operating the DMSY X feeder cubicle (Desa Mekar Saluyu) at the Dago Pakar substation based on technical age through simple load forecasting and FMEA (Risk Priority Number) RPN (Failure Mode and Effect Analysis) cubicles and financial feasibility based on NPV (Net Present Value) and economic life of cubicles. From the results of this research, DMSY brand X feeder cubicles were declared feasible to operate even though the results of the DMSY cubicle economic age analysis only until 2015. This is because the cubicle load forecasting this year is still within the limits of cubicles, this cubicle has never experienced interference based on interference data, and in NPV, cubicle provides a net benefit (Net Benefit) which is greater than the investment value of Rp. 35,576,912,923.27.
Low-cost sensor node based on electrochemical sensor module for wireless sensor network
Authors: Rudati P S , Feriyonika F , Rahmawati D
Published: May 2020

The low-cost sensor is now widely used in various applications ranging from the environment to daily live application. On the other hand, the low-cost sensor signal is dealing with noises due to external disturbances, quality of sensor material, or electronic circuits. The raw data provided by the low-cost sensor is also still in digital n-bit data and needs to convert. This research investigated the low-cost sensor node as part of the Wireless Sensor Network (WSN) for carbon monoxide (CO) measurement based on the electrochemical sensor module. Although the measurement signal consists of noise, a digital IIR filter attenuated this noise. By applying the Response Surface Method (RSM), the 10-bit data of the sensor has been calibrated to the commercially CO detector and resulted in the square transfer function equation. The sensor node measurement performance has a strong correlation (R2=0.98) with the performance of the sensor module in the wireless sensor node system. The data has been transmitted well to a gateway with needed settling time about 5 minutes for getting stable measurement conditions. The results show that various applications can use this low-cost sensor.
Evanescent fiber optic sensors using single mode fiber optics to measure acidity
Authors: Purnomo R D , Pantjawati A B , Hasanah L , Pawinanto R E , Sugandi G , Mulyanti B
Published: May 2020

This research aims to develop fiber optic sensors that can be used to measure acid rain levels. This fiber optic sensor uses the evanescent wave type method. SFP (Small Form-factor Pluggable) Transceiver with a wavelength of 1310nm is used as a fiber optic transmitter and receiver, while the Optical Power Meter (OPM) is used as a validator to test the developed sensor capability. The measurement results indicate the presence of loses successfully detected by OPM and SFP Transceiver. It appears that the maximum value of pH level has been successfully detected with a range of values of 8.72 dBm to 9.75 dBm and 8.7 dBm to 9.74 dBm respectively using SFP Transceiver and OPM. Good results during the validation process show that the fiber optic sensor has successfully worked with a strong correlation of 0.78 to monitor acid rain levels.
Increasing the output power of solar panel by using cooling system
Authors: Supian B A , Ekaputri C , Priharti W
Published: May 2020

Solar panel is a device to convert light energy from the sun into electrical energy, most of solar panel is made from semiconductor such as silicon. Solar panel is still having many disadvantages such as expensive prices, low efficiency, the power output that depended on light intensity and temperature, etc. During the day, solar panel temperature could increase and affect the power output. It is found that temperature would reduce solar panel voltage output that also reduce the power output. In this research, 100WP Monocrystalline solar panel power output will be enhanced by using cooling system to reduce the temperature of the solar panel. Cooling system of the solar panel is applied by flowing the water on the surface of the solar panel using 12V DC water pump. The experiment starts from 11:00 AM to 01:00 PM. The result of this experiment is the power output of the solar panel increased up to 5.79 Watt with the average about 2.96 Watt and the temperature of the solar panel decreased by 20.99°C. The temperature of the solar panel without cooling is about 52.83°C and with the cooling system is about 31.85°C.
The analysis of electrolyte water by using electrolysis cell and Galvani cell as electrical power storage
Authors: Kurniawan E , Aprillia B S , Hasan I M W
Published: May 2020

Any power generated by renewable electricity sources must be used immediately or it will be wasted. In this research, battery cell test will be carried out using the Galvani cell theory and electrolysis cell approach. Salt (NaCl) is an ingredient that can easily found. Salt itself is an ionic compound consisting of positive ions and negative ions to form neutral compounds, formed from the acidic reactions obtained from sodium and bases that are obtained from chlorine. Salt water is an element that is easy to electrolyze even though it uses a small current input. Salt water can also collect electricity in certain periods. This study discusses the use of salt or NaCl (Sodium Chloride) which will be combined with copper electrodes (Cu), carbon (C) and also aluminium (Al) as a storage of power generated from renewable energy sources. Based on the experimental analysis, combination of electrode that is the most linear in producing voltage and current are C and Zn.
Distributing PID controllers applied in water-mixing process
Authors: Rudati P S , Feriyonika F , Sudarsa Y , Ruyadi F , Santoso N W
Published: May 2020

In a process control system influenced by several parameters, which are usually located and separated in a large area, the one-central controller is not effective anymore. It is computationally hard for the controller hardware to do many tasks at the same time, therefore, they are considered to distribute in Local Control Units (LCUs). This research investigates the distributed PID controllers in the water-mixing process. The main controlled variables (SVG) are the level and temperature influenced by three parameters (flow-in of cold water, flow-in of hot water, and flow-out of the main tank), which are then distributed to LCU-1 to LCU-3. To maintain the SVG, the master controller is then designed based on the difference between SVG and feedback of the main-tank (PVG) so that it will deliver SV for each LCU. The results show that with control parameters in LCU-1 (Kp, Ti, Td are 2, 10, 0.46, respectively), LCU-2 (Kp, Ti, Td are 8, 6, 0.6), and LCU-3 (Kp, Ti, Td are 3, 70, 20), the response of water temperature (measured based on settling-time [Ts], % overshoot [OS], and rise-time [Tr]) are 42s, 0%, 45.3s. In the water level control, the response can be maintained with the 60s, 0%, 62s, for Ts, %OS, Tr, respectively.
Development of semiautomatic application prototype to identify g-banded normal human karyotype by size
Authors: Maulia P , Kevin K , Tan M I , Utama N P
Published: May 2020

Karyotype is a complete image of chromosomes arranged in accordance with the length, number, shape, and band of an individual cell’s chromosomes. Generally, the karyotype is performed by taking the chromosome image at metaphase, cutting out, and identifying each chromosome image based on G-banded manually. This process consumes a lot of time, energy, and inconsistency result. Therefore, it is necessary to develop an application which helps the karyotyping process automatically or at least semi-automatically. In this experiment, we proposed a semi-automatic karyotyping process by utilizing image processing techniques of normal human karyotype. The development of semiautomatic application prototype includes three steps, they were preprocessed chromosome image, featured extraction of chromosome image, and utilized tools to facilitate the users. The methods used in preprocessed chromosome image are gamma enhancement, bilateral filtering, adaptive thresholding, and flood-fill algorithms. The featured extraction of chromosome image is used to extract the morphological features, which will measure the chromosome based on length and pair of chromosomes using skeletonize method. Functionality, tools join and cut for users to modify the results of segmentation chromosome image has been successfully created. Based on the analytical result, it can be concluded that the proposed method can provide a relatively good representation of the chromosomes to assist the further chromosome analysis process.
Perspective student’s internship on development of technology in the industry
Authors: Sulistiyono F , Soemarto S , Abdullah A G
Published: May 2020

The internship program is given to introduce the world of work to students before graduating from school. Many things are obtained by students during internships, especially those related to skills development. School technology is different from industrial technology. They need to adjust to these differences. This research was conducted in the 11th grade students of Machining engineering as many as 46 students in the 2018/2019 school year. Internship students are spread across 24 manufacturing and service companies in Bekasi Regency. The questionnaire uses Google Forms to facilitate data collection. The research objective is to understand the development of technology in the industry according to the perception of the internship students. In addition, the suitability of student competencies is also checked. The results showed that Mechanical Engineering students were placed more in the “maintenance” section compared to other types of work. The Department of Mechanical Engineering is still needed in the industrial world. However, competencies learned in schools with industry are not appropriate.
Profile matching for students specialization in industrial engineering major
Authors: Awaliyah M M , Kurniawati A , Rizana A F
Published: May 2020

Nowadays, various specific skills are needed in the global work environment. Because of that, many university majors provide specializations within majors. The Industrial Engineering major at Telkom University has eleven specializations that can be selected by the fourth-year students. The class maximum capacity for each specialization is 45 students. Every academic year, some specializations have registrants more that the class maximum capacity. Therefore, this study aims to create a selection procedure. The methodology used in the selection procedure is profile matching. The matching is done between the students’ capacity and the requirements of the specializations. The capacity and the requirements are measured by using seven previous first to third-year courses as the criteria. The value of the criteria is measured by the grade index of the seven courses. The gap is identified between the students’ grade achievement and the highest grade. This study is limited to two specializations that have 55 and 47 registrants in the academic year of 2019/2020. The profile matching calculation is simulated using the data of three students for each specialization. The highest and the lowest match score from the six students are 4.9 and 3.6 (on a scale of 5).
Design and implementation of training module for control liquid level on tank using PID method based PLC
Authors: Yahya S , Jadmiko S W , Wijayanto K , Tahtawi A R A
Published: May 2020

Process control is widely used in various industries to maximize production, maintain desired quality levels, product safety and make the process more economical. Control that is generally used in industry is to control liquids, such as controlling the level, flow, pressure, and temperature of the liquid using the Proportional-Integral-Derivative (PID) method, the PID controller attempts to correct errors between the measured process variables and the desired set-point by calculation and then issue actions corrective which can be arranged according to the process. In the past, most PID controllers were based on microcontrollers, but now Programmable Logic Controller (PLC) can also operate PIDs with analog function control because PLC speeds and capabilities have increased. To meet the needs of student competence in process control following industry demands, especially the use of PLC with the PID Method, students need to be given knowledge and skills. One way is the availability of training modules that can grow their enthusiasm and skills when they learn. This paper presents the design and implementation of PLC Omron CP1H based process control training modules that can be used by students to study liquid level control in tanks with PLC-based PID methods. Based on the test results when the plant is disturbed, the system response obtained by the PID method is a 15 second settling time, 10.9% undershoot, and a steady-state value of 14.6 cm or ± 97.3% of the 15 cm setting value.
Implementing SWOT analysis in engineering education
Authors: Fardani I , Agustina I H , Jauzi F A
Published: May 2020

Information Technology-Based Education Management is an education system where the education management system includes the management of teaching and learning process data, student management of educator and education staff as well as school infrastructure is carried out using Information Technology (IT). Several studies have discussed factors about what influences teachers in using IT, which is access to resources, quality of software and hardware, ease of use, incentives to change, support, and collegiality in their school, school, and national police. Problems arise when the teaching and learning process does not change while the world of IT change very rapidly, and people automatically follow the change of IT, because of that the world of education must adapt to this change. The purpose of this research is to see how IT can be implemented in the education environment and analyzed using SWOT. The result is that the Education and School services in Bekasi Regency is in quadrant 4, this showing that education in Bekasi Regency is in a very unfortunate situation, the organization faces various internal threat and weakness. For this reason, the need for an agenda activities related to planning, organizing, implementing and controlling the academic management system for elementary and junior high school in Bekasi Regency is implemented by Information Technology-based education procedures.
Challenges and efforts for sanitation access growth in Indonesia
Authors: Tarlani T , Nurhasanah H , Destiani A T
Published: May 2020

Urban society’s 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.
Engineering concept for reclamation on land use of abandoned alluvial tin mine as a solution to achieve sustainable post-mining
Authors: Chamid C , Sulistijo B , Kusumo A D , Fhadila O
Published: May 2020

Hundreds of abandoned tin mines ponds in Bangka Belitung Province are not reclaimed properly during the post-mining activities. Reclamation in the former mining area ideally is a series of ongoing activities with planned post-mining activities. Planning for reclamation of abandoned tin mines or that has been re-mined by the community is a challenge to represent a concrete manifestation of sustainable management in the Indonesian mining sector to fulfill Government Regulation No. 78/2010 and the Minister of Energy and Mineral Resources Decree No. 1827/2018. This study purposes are to formulate the concept of the sustainable reclamation for the alluvial tin mines. Studies that have been conducted are to portrait topographic area by using drone, then followed by hydrology and hydrogeological mapping, infiltration and pumping test, shallow drilling and geohazard study. Air photo using drone can be used for topographic mapping. Ground water flows from the upper part area to central low land area which represents a river with low gradient. Three geohazards are identified such as flood, erosion and minor landslide. Based on the identified geohazards, the detail design of building ditch, sediment trap and reshaping landform are prepared carefully for the alluvial environment.
Green infrastructure concept in supporting rural development
Authors: Hindersah H , Asyiawati Y , Afiati A
Published: May 2020

Infrastructure is not only needed to push the development but also able to protect rural natural environment in which its ecosystem functions as life support. The challenge is that development activities should not change rural natural landscape. Green infrastructure which have multifunctional capacity offer the concept of environmental conservation while promote development activities based on natural resources. This paper aims at analyzing whether the concept of green infrastructure could support rural development as well as conserve the rural environment. Ciemas rural area is chosen as rural development location which begin to develop tourism activities. This study used a qualitative descriptive method, based on literature survey, on-site visual observation and survey of relevant official institutions. Based on demography statistic, geomorphology, vegetation cover and land use map data, this study identify socio-ecological linkages across Ciemas rural area and the prospect of development activities and propose green infrastructure types at rural landscape scale as a result. This paper conclude that green infrastructure concept could be implemented and protect Ciemas natural environment effectively as well as provide welfare to Ciemas community.
Sustainability of waste bank and contribution of waste management
Authors: Satori M , Amaranti R , Srirejeki Y
Published: May 2020

The challenges facing the city solid waste management (SWM) are increasing and complex because, in a new paradigm, solid waste is not only an environmental issue but also an economic and social issue. Therefore, the involvement of all stakeholders both the government and non-government in SWM is crucial. One of the roles of society as a part of city waste management is through the waste bank. This research is carried out by using a mix methods approach, for mapping and identifying the existing condition of the waste bank, a quantitative method is used and for designing waste bank development, a qualitative approach is used. Data collections were carried out by cluster purposive sampling method and to design the development of WB was done by a focus group interview. The result of this research shows that waste bank contributes to reducing recyclable waste up to 99,3 tons per day or 6,7% of the total generation of waste. To ensure sustainability, the waste bank must be integrated both in municipal waste management and in economic activities that affect the circular economy and the governments must pay attention of finance (incentives), procurement of facilities and infrastructure, as well as human resources training.
Synthesis of mesopore silica composite from rice husk with activated carbon from coconut shell as absorbent methyl orange color adsorbent
Authors: Yusmaniar Y , Erdawati E , Ghifari Y F , Ubit D P
Published: May 2020

The aim of this study is to synthesize mesoporous silica composites with activated carbon by utilizing rice husk waste and coconut shell as adsorbent to absorbs methyl orange dyes. Rice husk ash was hybridized with PEG into silica-PEG, then PEG was released by solvothermal extraction using DMG (dimethyl sulfoxide) as solvent to obtain mesopore silica. Composites are formed by homogenizing mesoporous silica and activated carbon with methanol. Composites were successfully synthesized based on SEM-EDX data which showed the distribution of carbon, silica and oxygen in surface morphology with content of 76.99%, 5.08% and 17.93% respectively. The results showed that the adsorption of composite adsorbent reached the adsorption capacity of 0,470 mg.g-1 in a pH 2 solution with 30 minutes of contact time. The occurrence of methyl orange adsorption is monolayer because it matches the Langmuir adsorption isotherm equation.
Soil organic matter in various land uses and management, and its accuracy measurement using near infrared technology
Authors: Kusumo B H , Purwanto A , Idris H , Sukartono S , Susilowati L E , Bustan B
Published: May 2020

The aim of this study is to investigate the soil organic matter (SOM) status in various land uses and management in Kayangan Sub-District, North Lombok, and its accuracy measurement using near infrared spectroscopy (NIRS). A total of 100 soil samples (0-10 cm depth) were collected from several land uses and management (rain-fed areas, irrigated areas, areas planted 1-3 times with seasonal crops, areas planted with 1-3 perennial plants) in the study area, which were dried, ground and sieved, then analyzed using Walkley and Black method and scanned using near infrared spectroscopy (NIRS). Partial least square regression (PLSR) was used to create SOM prediction models. The results showed that the SOM content varied from very low to moderate with most of them were low. The content of SOM was significantly higher in the irrigated areas compared to that of in the rain-fed areas, and also higher in the areas planted with seasonal crops 3 times a year compared to the areas planted 1-2 times a year. SOM content was higher in areas planted with 2-3 types of perennial plants, compared to with 1 type of perennial plant. NIRS technology was moderately accurate in measuring SOM, which can be used to monitor spatially changes in SOM.
Spatial analysis of tourist dispersal and mobility for tourism destination planning and development: A case study of great ocean road region, Australia
Authors: Novianti S , Fauzi C , Suhartanto D
Published: May 2020

Many studies encourage tourist destinations to consider dispersal and mobility as key strategic components of tourism planning and development. Essential aspects such as the visited destinations and the arrival as well as exit directions become a basis for formulating a tourism planning policy. However, research in examining this paradigm by using a spatial analysis is limited. Therefore, this paper introduces an analysis by using Geographic Information Systems (GIS) to create a visualization of tourist dispersal and mobility. This methodology was implemented in the Great Ocean Road Region, an iconic regional destination in Australia that is experiencing limited tourist dispersal. Results from 351 questionnaires were processed by GIS with a web-based application. The data were processed by using certain tools, including ArcGIS ESRI to create spatial data as well as PHP and JavaScript programming languages to visualize the results. The results show that there is a low geographical dispersal in the region because the hinterland area remains untapped while the coastal area receives abundant of tourists. It is aggravated by limited tourist mobility due to the same directions of tourists’ arrival and exit. With GIS technology, the visualization of this spatial analysis shows a possible tourism pressure that is worth noted by policymakers in the planning and development process.
Evaluating the availability of facilities in the elderly park in terms of environmental sustainability
Authors: Akliyah L S , Solihin F D M
Published: May 2020

Bandung City has many thematic parks spread across several districts. One of them is Taman Lansia (Elderly Garden). Although according to Bandung City Government that parks are intended for all age groups, there should be a target for visitors based on different age groups in each park based on the theme. The elderly has physical and psychological limitations that cause the elderly age have special needs that are different from the productive and pre-productive age communities, so special facilities are needed for the elderly in Bandung. Based on observation, existing facilities in Taman Lansia had not been able to cover the elderly needs. So that, the purpose of the study was identifying visitor characteristics and analyzing the facilities needed at Taman Lansia according to the elderly characteristics. The data collection methods were getting observation and interviews. The variables must fulfill criteria for facility that the elderly needs, such as accessibility, security, and convenience. The analysis methods were descriptive analysis. This study indicated that Taman Lansia visitors were dominated by elderly residents. There were several types of facilities that have not been provided in accordance with the characteristics of the elderly such as ramp handrails. The available facilities did not consider the characteristics and needs of the elderly.
Intelligent decision support systems for determining tour bus route with time windows: A metaheuristic approach
Authors: Hudzaifah H , Rizana A F , Ramadhan F , Imran A
Published: May 2020

The transportation routing problem is a very popular field in operations research and management science area. Many previous researches are still continuing to develop model and algorithm to produce the best transportation route optimization in various research objects. Technology has enabled the development of the intelligent decision support system (I-DSS) to optimize transportation route. Although technology has evolved, there are still few researches that build I-DSS software to minimize transportation distance and fuel consumption, especially using the metaheuristic approach. Thus, this paper aims to develop I-DSS software to minimize fuel consumption and travel distance by considering time-windows constraint using metaheuristic approach. The software can receive input dynamically to evaluate and select the best transportation route. The results of this software have been tested using real historical data from one of tour and travel company in Indonesia. The company provides travel services using a bus to visit several tourist attractions based on the opening hours of the destinations. I-DSS software output shows that the travel distance is 25.64% more efficient than the current real conditions. In addition, the fuel consumption produced by I-DSS is better than the actual conditions, which is 17.35% more efficient.
Modelling customer loyalty using partial least square: An empirical evidence from online food industry
Authors: Suhartanto D , Leo G , Setiawati L , Purwaningsih S S
Published: May 2020

The online food delivery service industry has emerged as huge and prospective industry. In this competitive business environment, having and developing loyal customer are essential; yet, research to examine customer loyalty modelling in this industry is limited. This study is designed to assess the applicability of Partial Least Square Modelling to assess the customer loyalty toward online food delivery service. This study uses a survey of 405 online food service customers collected from greater Bandung region. The model, including four quality system predictors (efficiency, fulfilment, availability, and privacy), was examined using SmartPLS software. The results show that the model of loyalty toward online food has an acceptable Goodness of Fit Index. Further, the R2 of the customer loyalty in the model is 0.67. These results indicate that the method applied is suitable for modelling customer loyalty. This study offers an empirical evidence on the applicability of Partial Least Square to model the customer loyalty toward online food delivery service. This result extends the existing methodological and managerial practices to develop loyalty in the online food industry.
Redesigning the packaging of batik fabric products using kansei engineering method (Case study: Rumah Batik Komar)
Authors: Mulyati D S , Silvana R D , Aviasti A , Oemar H
Published: May 2020

Packaging is an important part of a product. Rumah Batik Komar, which produces batik and creates batik tourism will improve their product package so that the new packaging designs will be made at a lower cost but still provide good quality. The purpose of this study is to minimize packaging costs by designing new packaging based on the respondents’ wishes while maintaining the quality of the packaging that will be redesigned. The method used is Kansei Engineering, which is a method that defines consumer desires based on the image through Kansei Words into product design. The Conjoint Analysis is used to determine the value of the relationship between the element design and Kansei Words. The result shows that the desired packaging by the customer is black, rectangular and made of paper. From the calculation results there are 12 kansei words that represent the image of the respondent’s wishes including made of paper, attractive-coloured, using ribbons, reusable, recyclable, saving space, instagrammable, attractive, luxurious, easy to carry, having logos and hard textured.
Pineapple peel industry determination with weighted location method
Authors: Nu’man A H , Nurwandi L , Bahtiar I , Omar S
Published: May 2020

This study discusses alternative fuels to replace gasoline with bioethanol. Bioethanol can be produced including pineapple, where the peel can be used to be converted into bioethanol instead of gasoline. The use of pineapple peel for small-scale production in this study was the main focus, so that the community would get benefit from the economic value. The community to use pineapple peel is the main concern, to get information about the capacity of an area. Measurement of capacity is carried out by taking into account transportation, raw material, land, energy, labour, waste, and market factors. The assessment was carried out on five zones of pineapple farming using analytical hierarchy process (AHP). Each area is determined by its coordinates, then multiplied by the weight of each region produced. The calculation results show that the determination of area was chosen to be a small-scale bioethanol production area concerning with dependent on the policy, raw materials, and transportation factor, it show that policy factor must be exist to support the operation of bioethanol industry with pineapple peels material.
Entrepreneurship capability in industrial engineering and its effect on competitiveness
Authors: Dzikron M , Djamlaudin D , Orgianus Y , Oemar H
Published: May 2020

Entrepreneurship and competitiveness are interesting topics in regional economic development. The study aims to examine the effect of entrepreneurship on competitiveness in the leather industry. The study was applied to the leather tanning industry in Indonesia. The research method is based on a survey of 42 leather tanning companies, data analysis using the Partial Least Square. The research findings the effect of Entrepreneurship on Competitiveness has a low correlation. The cause of the low level of Entrepreneurship in SMIs is mainly in achievement motivation, leadership and business orientation factors. Therefore it is suggested to employers and the government to encourage entrepreneurial skills through entrepreneurship education, facilitation of capital and marketing and building partnerships in the leather industry.
Young people activities in the responsibility of environmental sustainability: Indonesian perspective
Authors: Anwar A , Achiraeniwati E , Djaohari A H N
Published: May 2020

Sustainability is the process of maintaining change in a balanced fashion, in which the exploitation of resources, the direction of investments, the orientation of technological development and institutional change are all in harmony and enhance both current and future potential to meet human needs and aspirations. So it is necessary to think of a way so that everyone is able to maintain environmental sustainability, so that there is no exploitation of natural resources that will affect the next generation. The young generation who will be the success or needs to be involved in the sustainability of this environment. Based on this, it is necessary to conduct a study to find out the extent of the responsibility of the younger generation towards environmental sustainability in their country. Primary data collection is done by means of interviews and field observations on students on selected campuses in Indonesia. While secondary data collection is done by literary studies. Specifically the study will focus on the following objectives: to examine the level of responsiveness of millennial and post-millennial generation on social, environmental and economic sustainability; and to identify the opportunities and challenges in cultivating responsiveness on sustainability among millennial and post-millennial generations.
The effects of carbon tax on inventory and land multimodal integration
Authors: Ardliana T , Pujawan I N , Siswanto N
Published: May 2020

Climate change has contributed in extreme weather events recently due to the effect of global warming. One of the main factors is the carbon emissions that have exceeded the permitted limits. Many countries in the world have taken some significant actions by making some commitments to reduce the effect of it. One of the commitments is to give a penalty cost of each unit emissions produced by a country or a company. In this study, we developed an integration model between inventory and multimodal land transportation by focusing on the costs of emissions produced. To distribute products from several suppliers to several customers, we proposed train as long distance transportation mode and truck as short distance transportation mode. The purpose of this study is to find the best solution for total system costs which consists of operational and emissions costs. The numerical experiments show that the carbon tax rate affects the amount of carbon emissions and the total cost. The trade-off between emissions and the costs will produce an optimal solution. The method used in finding the optimal condition is Mixed Integer Linear Programming.
Measurement of quality services in the laboratory
Authors: Nugraha N , Mulyati D S , Bachtiar I , Nursagita C
Published: May 2020

The problem in this study is complaints about the quality of laboratory services in the Faculty of Engineering which were delivered by students through a pre-research questioner. This problem needs to be corrected by measuring the quality of laboratory services so that it can increase satisfaction from students. The purpose of this research is to find out student satisfaction with the quality of services in the Faculty of Engineering laboratory. The method used in this study is the Service Quality (SERVQUAL). The results of the research obtained using the SERVQUAL model, the lowest values for each dimension were obtained. Tangible; laboratory room are clean, comfortable and spacious in accordance the standard national laboratory. Empathy; Assistants the Laboratory gives attention and prioritizes. Responsiveness; Assistants provide services quickly and precisely. Reliability; The assessment process is an objective and transparant. The Assurance; Assistant has the ability to answer all practical questions. The conclusion of the research that The priority to improve service quality the dimensions of tangible; laboratory room are clean, comfortable and spacious in accordance the standard national laboratory.
The utilization of local bamboo based materials for innovation of playing and creating media in children age of preschool
Authors: Purwanto P
Published: May 2020

Play is one of the right stimulations for children to stimulate thinking power, to empower emotional, social, and physical aspects. There are several types of games that shape the skills and creativity of children, one of which is a game of compiling puzzles, because playing puzzles can coordinate the movements of the eyes and hands of children or fingers movements, with it without them knowing that the fine motoric skills of the child continue to be trained and developing. This paper was on addressing the problems encountered in the Amongsiwi playgroup, Panggungharjo village, Bantul, namely the lack of availability of play and creative media. The purpose of the paper is on method to create a play and creative media innovation from local materials in the form of puzzle Cendani bamboo that is feasible, safe, and environmentally friendly for preschoolers. The research was conducted by collecting data, observing and analyzing problems, product design and product testing (testing on children). The results of the study indicate that the design of play and creative media can be accepted by children with a feasibility level of 78 %. The level of ability of children to use or to compile a puzzle to form a shape based on observations was 76 % of 22 children can already be in the form of tangible shapes such as animals, cars or robots.
Implementation supply chain management concept in the industrial symbiosis of the fragrant lemongrass distillation
Authors: Aviasti A , Amaranti R , Nugraha N
Published: May 2020

The citronella oil refining industry contributes greatly to improving the community’s economy. In the supply chain of citronella oil, the community usually acts as a supplier (fragrant lemongrass farmers), manufacturers (distillers of citronella oil), and distributors (collectors of citronella oil). The main problem in the citronella oil refining industry is the uncertainty of the supply chain. Fragrant lemongrass supply chain mapping is done to determine the capacity and needs of all actors involved from raw material sources to retail consumers. Thus, the continuity of fragrant lemongrass supplies increased production capacity in refineries, and market potential can be estimated more precisely. On the other hand, integration between industries is needed to prevent the impact of environmental damage while increasing profits. The symbiosis model of the citronella refining industry is expected to optimize the potential and existing resources through an industrial system that is efficient, integrated, easy to implement, and environmentally sound. This paper will discuss how the application of supply chain management concepts in the symbiosis of the citronella refining industry so that the objectives of cooperation in the environmentally sound supply chain can be realized.
Synthesis and characterization of chitosan-bentonite modified polyurethane with biomedical potential
Authors: Rihayat T , Suryani S , Riskina S , Nurhanifa N
Published: May 2020

Research on the manufacture of polyurethane with chitosan and bentonite fillers modified with CTAB into montmorillonite (MMT) which will be applied to medical devices. The raw polyurethane from castor oil and diisocyanate is in the form of Toluene Diisocyanate (TDI). The addition of chitosan to castor oil polyurethane functions as an anti-bacterial agent. Pure polyurethane still has a deficiency of high temperatures and therefore added MMT which functions as a heat-retaining agent. The bacteria used are E. coli bacteria and Staphylococcus Aureus bacteria. The results showed a polyurethane that can withstand high temperatures is PU-MMT-CS 6%. The best anti-bacterial properties were obtained in polyurethane containing chitosan with higher concentrations (PU-MMT-CS 6%)
Investigation of reducing electricity consumption in the refrigerator by using domestic refrigerant MC-22
Authors: Mutaufiq M , Berman E T , Sumardi K , Wiyono A , Gandidi I M
Published: May 2020

A household refrigerator was machine that operates continuously throughout the day to keep food fresh. So that a little savings in electricity consumption was very beneficial. The purpose of this study was to obtain savings in refrigerator electricity consumption by replacing R-134a working fluid with Musicool-22 (MC-22) as natural refrigerant. Furthermore, to reducing global warming potential of the earth’s surface due to HFCs refrigerants. The study was designed experimentally with the retrofit refrigerant drop in substitute method on refrigerator. The test was started by measuring the performance of refrigerators using R-134a working fluid. Then the working fluid R-134a was retrofitted with MC-22 with a mass of 15%, 20%, 25%, 35%, 45%, and 65% of the mass of R-134a. Finally, the performance of the refrigerator that has been retrofitted using the MC-22 was measured as a measurement of the performance of the refrigerator using the R-134a. The test results showed that, when the refrigerator was retrofitted using MC-22 with a mass of refrigerant 25% mass of R-134a refrigerant, the performance of the refrigerator increases. Electricity consumption was more efficient with a marked decrease in electrical power requirements to 12.2%. In addition, the freezer room temperature is lower at 6.9 °C compared to when operating with R-134a working fluid.