Pub Date : 2022-04-01DOI: 10.35806/ijoced.v4i1.248
M. Iyobhebhe, A. D. Usman, A. Tekanyi, E. Agbon
This work focuses on the clustering in Wireless Body Area Network (WBAN). Recently, it was found that less attention was given to Line-of-Sight (LoS) and Non-Line-of-Sight (NLoS) clustering in WBAN. Past works on LoS clustering WBAN consider the problem of enhancing the network throughput and end-to-end delay of the network. However, the problem of necessary hop count for packet transmission has not been considered. The non-consideration of necessary nodes hop count degrades the performance of cluster-based WBAN as throughput of the network is reduced in addition to high end-to-end delay. This work develops a hop count aware WBAN for enhancing the performance of body nodes called improved Dual Sink Approach using Clustering in Body Area Network (iDSCB). The simulation results depicted that the hop distance criterion of iDCSB improved the performance of WBAN in terms of end-to-end delay and throughput by 3.16% and 6.59%, respectively.
{"title":"Hop-Count Aware Wireless Body Area Network for Efficient Data Transmission","authors":"M. Iyobhebhe, A. D. Usman, A. Tekanyi, E. Agbon","doi":"10.35806/ijoced.v4i1.248","DOIUrl":"https://doi.org/10.35806/ijoced.v4i1.248","url":null,"abstract":"This work focuses on the clustering in Wireless Body Area Network (WBAN). Recently, it was found that less attention was given to Line-of-Sight (LoS) and Non-Line-of-Sight (NLoS) clustering in WBAN. Past works on LoS clustering WBAN consider the problem of enhancing the network throughput and end-to-end delay of the network. However, the problem of necessary hop count for packet transmission has not been considered. The non-consideration of necessary nodes hop count degrades the performance of cluster-based WBAN as throughput of the network is reduced in addition to high end-to-end delay. This work develops a hop count aware WBAN for enhancing the performance of body nodes called improved Dual Sink Approach using Clustering in Body Area Network (iDSCB). The simulation results depicted that the hop distance criterion of iDCSB improved the performance of WBAN in terms of end-to-end delay and throughput by 3.16% and 6.59%, respectively.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49491986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.35806/ijoced.v4i1.238
Silvira Trijayati, Jerry Kurniawan Tumewah, A. Harditya
COVID-19 is a disease that has spread throughout the world and is transmitted through inhalation or contact with droplets of infected people. The Indonesian Government has established a health protocol to reduce the spread of COVID-19, which is checking the body temperature of visitors at public places. The officers' representatives from public places are mobilized to check the body temperature of the visitors by bringing the thermometer closer to the forehead or hand of the visitors. This paper aims to design a contactless thermometer using an Arduino Uno by adding an interactive design and light installation. It aims to enhance the user-experience rather the design idea itself. The thermometer will move a mechanical flower adjusted by the temperature measurement with this product design.
{"title":"An Interaction Design for Improving User Experience with the Health Protocol of COVID-19 Pandemic in Indonesia","authors":"Silvira Trijayati, Jerry Kurniawan Tumewah, A. Harditya","doi":"10.35806/ijoced.v4i1.238","DOIUrl":"https://doi.org/10.35806/ijoced.v4i1.238","url":null,"abstract":"COVID-19 is a disease that has spread throughout the world and is transmitted through inhalation or contact with droplets of infected people. The Indonesian Government has established a health protocol to reduce the spread of COVID-19, which is checking the body temperature of visitors at public places. The officers' representatives from public places are mobilized to check the body temperature of the visitors by bringing the thermometer closer to the forehead or hand of the visitors. This paper aims to design a contactless thermometer using an Arduino Uno by adding an interactive design and light installation. It aims to enhance the user-experience rather the design idea itself. The thermometer will move a mechanical flower adjusted by the temperature measurement with this product design.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41546097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.35806/ijoced.v4i1.240
Benjamin Kommey, F. Gyimah, J. J. Kponyo, S. A. Andam-Akorful
Higher institutions run various programs. These programs must be authorized, in other words accredited by a National Institution for accreditation to ensure quality and standards. This research paper aims to provide a convenient way of accreditation for the various programs in universities or institutions of higher learning. The College of Engineering at the Kwame Nkrumah University of Science and Technology (KNUST) was used as a case study. Using the client-server model, a web-based, very flexible, and well secured accreditation management software was designed to address most of the challenges faced with manual accreditation process of the College of Engineering. The system provides a central database where all accreditation related information of the various programs is stored for easy access and modification by authorized personnel. A secured link and robust access control via authentication were implemented and a user management system was integrated. The system was tested and resulted encouraging outcomes, with some further works are recommended in the future to improve the features of the system.
{"title":"A Web Based System for Easy and Secured Managing Process of University Accreditation Information","authors":"Benjamin Kommey, F. Gyimah, J. J. Kponyo, S. A. Andam-Akorful","doi":"10.35806/ijoced.v4i1.240","DOIUrl":"https://doi.org/10.35806/ijoced.v4i1.240","url":null,"abstract":"Higher institutions run various programs. These programs must be authorized, in other words accredited by a National Institution for accreditation to ensure quality and standards. This research paper aims to provide a convenient way of accreditation for the various programs in universities or institutions of higher learning. The College of Engineering at the Kwame Nkrumah University of Science and Technology (KNUST) was used as a case study. Using the client-server model, a web-based, very flexible, and well secured accreditation management software was designed to address most of the challenges faced with manual accreditation process of the College of Engineering. The system provides a central database where all accreditation related information of the various programs is stored for easy access and modification by authorized personnel. A secured link and robust access control via authentication were implemented and a user management system was integrated. The system was tested and resulted encouraging outcomes, with some further works are recommended in the future to improve the features of the system.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44144902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.35806/ijoced.v4i1.243
L. Anggraini, A. Wahyuni, Rendi Hernawan, T. Kurniawan
This paper examines the use of waste energy in a 3x1 MW Gas Engine Power Plant (GEPP) on Bawean Island, Indonesia. The feasibility method uses water-lithium bromide (H2O-LiBr) technology as absorption refrigeration technology. In addition, bananas are also used for cold storage to overcome waste energy utilization. The cold storage is placed in the 300 m3 area with a 100 kg load capacity for a banana with a temperature of 5oC, 85% humidity, 24 hours of operation, 1292 W cooling load, and 371 TR. This system is used because it utilizes a cheap energy source that dissipates heat from gas and has no ecological hazards, such as ozone layer depletion and global warming. The exhaust gas temperature is 500oC. Moreover, cooling loads for cold storage, which are used with thermodynamic models, and consistent fluid properties, performance, and size of cold storage were also investigated. The results obtained show that higher cold storage output comes from internal factors as compared to external factors. In addition, the absorption refrigerant with Tevaporation is 5oC, capacity 403 TR and Qabsorption is 984 kW, Qgenerator is 1066 kW, Qevaporation is 1411 kW, Qcondenser is 1493 kW, with an absorption coefficient of performance (COP) of 1.32 and power consumption of 158,25 kW. Furthermore, after calculations, analysis, and field experiments, it shows that the internal factor of the cooling load is higher than the external factor sourced from bananas in the cold storage. This phenomenon occurs probably due to the product being refrigerated, following the soar cooling capacity. Thus, the waste energy in PLTGU 3x1 MW has tried to be utilized by the refrigerant absorption system.
{"title":"Performance Optimization of Power Plant Waste Heat Using H2O-LiBr Absorption Refrigerant System","authors":"L. Anggraini, A. Wahyuni, Rendi Hernawan, T. Kurniawan","doi":"10.35806/ijoced.v4i1.243","DOIUrl":"https://doi.org/10.35806/ijoced.v4i1.243","url":null,"abstract":"This paper examines the use of waste energy in a 3x1 MW Gas Engine Power Plant (GEPP) on Bawean Island, Indonesia. The feasibility method uses water-lithium bromide (H2O-LiBr) technology as absorption refrigeration technology. In addition, bananas are also used for cold storage to overcome waste energy utilization. The cold storage is placed in the 300 m3 area with a 100 kg load capacity for a banana with a temperature of 5oC, 85% humidity, 24 hours of operation, 1292 W cooling load, and 371 TR. This system is used because it utilizes a cheap energy source that dissipates heat from gas and has no ecological hazards, such as ozone layer depletion and global warming. The exhaust gas temperature is 500oC. Moreover, cooling loads for cold storage, which are used with thermodynamic models, and consistent fluid properties, performance, and size of cold storage were also investigated. The results obtained show that higher cold storage output comes from internal factors as compared to external factors. In addition, the absorption refrigerant with Tevaporation is 5oC, capacity 403 TR and Qabsorption is 984 kW, Qgenerator is 1066 kW, Qevaporation is 1411 kW, Qcondenser is 1493 kW, with an absorption coefficient of performance (COP) of 1.32 and power consumption of 158,25 kW. Furthermore, after calculations, analysis, and field experiments, it shows that the internal factor of the cooling load is higher than the external factor sourced from bananas in the cold storage. This phenomenon occurs probably due to the product being refrigerated, following the soar cooling capacity. Thus, the waste energy in PLTGU 3x1 MW has tried to be utilized by the refrigerant absorption system.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46327744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-25DOI: 10.35806/ijoced.v3i2.184
Amartya Natayu, Fatima Kamila, I. Dananjaya, Rhainna Reflin, Muhamad Fikri
As an archipelago country in the equator, Indonesia has a tropical climate and often is subjected to monsoonal circulation. The geographical location affects Indonesia to have two seasons, which are the rainy season and drier season. Every season has its characteristic impacts against the mean temperature and rainfall rate. This research aims to analyze Indonesia’s mean temperature and rainfall rate data concerning its tropical climate. The areas observed are limited to Java, Bali, and Nusa Tenggara Island from January 2019 to December 2020. The data gathered from the official Badan Meteorologi Klimatologi dan Geofisika (BMKG) website were processed using MATLAB, and Spearman’s correlation was applied to analyze the rainfall and temperature data. From the observation, this study discovered that the mean temperature data is stable throughout the areas but reaches maximum during the transition between rainy and drier seasons and minimum during the middle of the rainy season. The data observation is often fluctuated, even though showing less rain during the drier season and more during rainy seasons. The fluctuation is affected by the geographical fact that Indonesia has a large water surface, which makes evaporation easily induced by warm tropical temperatures.
{"title":"Understanding the Climate Behavior Through Data Interpretation: Java-Bali-Nusa Tenggara Case","authors":"Amartya Natayu, Fatima Kamila, I. Dananjaya, Rhainna Reflin, Muhamad Fikri","doi":"10.35806/ijoced.v3i2.184","DOIUrl":"https://doi.org/10.35806/ijoced.v3i2.184","url":null,"abstract":"As an archipelago country in the equator, Indonesia has a tropical climate and often is subjected to monsoonal circulation. The geographical location affects Indonesia to have two seasons, which are the rainy season and drier season. Every season has its characteristic impacts against the mean temperature and rainfall rate. This research aims to analyze Indonesia’s mean temperature and rainfall rate data concerning its tropical climate. The areas observed are limited to Java, Bali, and Nusa Tenggara Island from January 2019 to December 2020. The data gathered from the official Badan Meteorologi Klimatologi dan Geofisika (BMKG) website were processed using MATLAB, and Spearman’s correlation was applied to analyze the rainfall and temperature data. From the observation, this study discovered that the mean temperature data is stable throughout the areas but reaches maximum during the transition between rainy and drier seasons and minimum during the middle of the rainy season. The data observation is often fluctuated, even though showing less rain during the drier season and more during rainy seasons. The fluctuation is affected by the geographical fact that Indonesia has a large water surface, which makes evaporation easily induced by warm tropical temperatures.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48717955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-25DOI: 10.35806/ijoced.v3i2.155
Anggi Kurniawan, H. Tsutsui
Fast-ions confinement is a prominent subject in developing nuclear fusion reactors due to its importance in sustaining the burning plasma and keeping energy production. However, confining them has proven to be difficult until now, and one of the reasons is that the inherent discrete magnetic field produces a magnetic ripple. A better understanding of fast-ions transport using appropriate numerical calculation tools needs to be developed to overcome such a challenge in the engineering aspect. This study revisited data collection of fast ion transport simulated under the ripple presence in a nuclear fusion device. The ion trajectories were followed using two orbit-following equation schemes, and the ripple-resonance island size in the Poincaré section was compared. The result showed that the island size obtained by each scheme was different when the particle resonates with a stronger ripple field and, proportionally, the diffusion coefficients are different. The physical meaning and consequence behind this discovery were discussed in this paper.
{"title":"Analyzing Fast-ions Trajectories in a Nuclear Fusion Reactor through Its Poincaré-Island Size and Ripple Resonance","authors":"Anggi Kurniawan, H. Tsutsui","doi":"10.35806/ijoced.v3i2.155","DOIUrl":"https://doi.org/10.35806/ijoced.v3i2.155","url":null,"abstract":"Fast-ions confinement is a prominent subject in developing nuclear fusion reactors due to its importance in sustaining the burning plasma and keeping energy production. However, confining them has proven to be difficult until now, and one of the reasons is that the inherent discrete magnetic field produces a magnetic ripple. A better understanding of fast-ions transport using appropriate numerical calculation tools needs to be developed to overcome such a challenge in the engineering aspect. This study revisited data collection of fast ion transport simulated under the ripple presence in a nuclear fusion device. The ion trajectories were followed using two orbit-following equation schemes, and the ripple-resonance island size in the Poincaré section was compared. The result showed that the island size obtained by each scheme was different when the particle resonates with a stronger ripple field and, proportionally, the diffusion coefficients are different. The physical meaning and consequence behind this discovery were discussed in this paper.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43037195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-25DOI: 10.35806/ijoced.v3i2.172
Dwi Joko Suroso, Refa Rupaksi, A. Krisnawan, Nur Siddiq
The device-free indoor localization (DFIL) research is gaining attention due to the popularity of location-based service (LBS)-based advertisement. In DFIL, a user or an object does not need to bring any device to be localized. In this paper, we propose the Wi-Fi-based DFIL and the random forest algorithm for the fingerprint-based technique. The simple parameter commonly used in indoor localization is the Received Signal Strength Indicator (RSSI). We apply the fingerprint technique because of its reliability to handle the RSSI fluctuation and time-varying effect in a static indoor environment. We conducted an actual measurement campaign to observe the DFIL's implementation visibility. The DFIL system works by comparing the database fingerprint in an empty open office with the database in which a person is inside the measurement area without bringing any devices. Thus, we have the device-free RSSI database for fingerprint technique from both empty rooms and RSSI affected by a person inside the room. We validated the random forest algorithm results by comparing them with the k-nearest neighbor (kNN) and artificial neural network (ANN). The results show that our proposed system's accuracy is better than kNN and ANN with a mean error of 0.63 m than kNN with 0.80 m and ANN with 1.01 m. Meanwhile, the precision of the random forest is 0.63 m, whereas kNN and ANN are 0.67 m and 0.80 m, showing that the random forest performed better. We concluded that our simple DFIL system is visible to apply with acceptable accuracy performance.
{"title":"Random Forest-based Fingerprinting Technique for Device-free Indoor Localization System","authors":"Dwi Joko Suroso, Refa Rupaksi, A. Krisnawan, Nur Siddiq","doi":"10.35806/ijoced.v3i2.172","DOIUrl":"https://doi.org/10.35806/ijoced.v3i2.172","url":null,"abstract":"The device-free indoor localization (DFIL) research is gaining attention due to the popularity of location-based service (LBS)-based advertisement. In DFIL, a user or an object does not need to bring any device to be localized. In this paper, we propose the Wi-Fi-based DFIL and the random forest algorithm for the fingerprint-based technique. The simple parameter commonly used in indoor localization is the Received Signal Strength Indicator (RSSI). We apply the fingerprint technique because of its reliability to handle the RSSI fluctuation and time-varying effect in a static indoor environment. We conducted an actual measurement campaign to observe the DFIL's implementation visibility. The DFIL system works by comparing the database fingerprint in an empty open office with the database in which a person is inside the measurement area without bringing any devices. Thus, we have the device-free RSSI database for fingerprint technique from both empty rooms and RSSI affected by a person inside the room. We validated the random forest algorithm results by comparing them with the k-nearest neighbor (kNN) and artificial neural network (ANN). The results show that our proposed system's accuracy is better than kNN and ANN with a mean error of 0.63 m than kNN with 0.80 m and ANN with 1.01 m. Meanwhile, the precision of the random forest is 0.63 m, whereas kNN and ANN are 0.67 m and 0.80 m, showing that the random forest performed better. We concluded that our simple DFIL system is visible to apply with acceptable accuracy performance.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46901555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-25DOI: 10.35806/ijoced.v3i2.150
M. Oktaviandri, Ng Siew Kian
Shredded meat is more palatable to the taste of consumer and preparing shredded meat in a large scale requires the aid of meat shredder machine. This paper presents a detailed design procedure of a meat shredder machine developed by the VDI2221 approach. This paper also elaborates on the design of each part of the machine which includes selecting the components of the cutting and transmission system, kinematic arrangement of forces, material selection on the machine and proportion of parts to ensure the maximum strength and functionality of the machine. Further, the design of the various parts of the machine in 3D model and machine fabrication are discussed, along with the testing on the function and geometric aspects to ensure the efficiency of the machine. This study developed a meat shredder machine with 0.5 Hp electric motor and capacity of 2 kg per hour.
{"title":"Design and Fabrication of Meat Shredder Machine Using VDI2221 Approach","authors":"M. Oktaviandri, Ng Siew Kian","doi":"10.35806/ijoced.v3i2.150","DOIUrl":"https://doi.org/10.35806/ijoced.v3i2.150","url":null,"abstract":"Shredded meat is more palatable to the taste of consumer and preparing shredded meat in a large scale requires the aid of meat shredder machine. This paper presents a detailed design procedure of a meat shredder machine developed by the VDI2221 approach. This paper also elaborates on the design of each part of the machine which includes selecting the components of the cutting and transmission system, kinematic arrangement of forces, material selection on the machine and proportion of parts to ensure the maximum strength and functionality of the machine. Further, the design of the various parts of the machine in 3D model and machine fabrication are discussed, along with the testing on the function and geometric aspects to ensure the efficiency of the machine. This study developed a meat shredder machine with 0.5 Hp electric motor and capacity of 2 kg per hour.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45711931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Triawan, G. Aprilia, K. Saptaji, R. Saville, A. Nandiyanto
Crispness is the most appealing characteristic of dry food products. However, the term crispness has different subjective meaning among consumers. This study aims to quantitatively measure the crispness of potato crisp by performing compression test on a single specimen, and analyzing the compressive behavior, i.e., compressive strain energy. The crispness of the specimens were differentiated by changing the moisture exposure durations, which are 0, 1, 2, 3, 6 hours, in a room and ambient condition. The measured load and displacement data were transformed into stress and strain curves. The strain energy for every 1% strain increment was calculated and investigated to determine the crispness. The crispness difference among specimens of 0, 3, and 6 hours groups was significantly perceived at 8% of strain. It was revealed that the 3 and 6 hours of room air exposure could decrease the crispness by 17% and 45%, respectively. This suggests the compressive strain energy at a certain strain can be an indicator of crispness. This experimental study is expected to evolve food engineering by proposing a simple yet precise crispness measurement method for dry food.
{"title":"Determining Crispness Level of Dry Food through Its Compressive Strain Energy","authors":"F. Triawan, G. Aprilia, K. Saptaji, R. Saville, A. Nandiyanto","doi":"10.35806/ijoced.v3i2.55","DOIUrl":"https://doi.org/10.35806/ijoced.v3i2.55","url":null,"abstract":"Crispness is the most appealing characteristic of dry food products. However, the term crispness has different subjective meaning among consumers. This study aims to quantitatively measure the crispness of potato crisp by performing compression test on a single specimen, and analyzing the compressive behavior, i.e., compressive strain energy. The crispness of the specimens were differentiated by changing the moisture exposure durations, which are 0, 1, 2, 3, 6 hours, in a room and ambient condition. The measured load and displacement data were transformed into stress and strain curves. The strain energy for every 1% strain increment was calculated and investigated to determine the crispness. The crispness difference among specimens of 0, 3, and 6 hours groups was significantly perceived at 8% of strain. It was revealed that the 3 and 6 hours of room air exposure could decrease the crispness by 17% and 45%, respectively. This suggests the compressive strain energy at a certain strain can be an indicator of crispness. This experimental study is expected to evolve food engineering by proposing a simple yet precise crispness measurement method for dry food.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43807885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-23DOI: 10.35806/ijoced.v3i2.175
E. Jusli, J. H. Ling, M. Bujang, D. Ali, Toh Sing Lee
Cement brick is an essential construction component, which uses cement as the primary binder. The cement industry was identified as the major contributor to carbon dioxide emission, which is a greenhouse gas. The application of agro-industrial waste as partial cement replacement can reduce the negative impacts on the environment. In this study, the palm oil wastes, namely Palm Oil Clinker Powder (POCP) and Palm Oil Boiler Ash (POBA), were used as partial cement replacement. A total of 60 specimens were prepared with 0%, 10%, 20%, and 30% cement replacement by POCP and POBA. The physical and mechanical properties of bricks, such as density, water absorption, voids, and compressive strength, were investigated. The results show that the brick with 20% CP and BA could be used as a severe weathering brick.
{"title":"An Application of Blended Palm Oil Waste in Brick Production","authors":"E. Jusli, J. H. Ling, M. Bujang, D. Ali, Toh Sing Lee","doi":"10.35806/ijoced.v3i2.175","DOIUrl":"https://doi.org/10.35806/ijoced.v3i2.175","url":null,"abstract":"Cement brick is an essential construction component, which uses cement as the primary binder. The cement industry was identified as the major contributor to carbon dioxide emission, which is a greenhouse gas. The application of agro-industrial waste as partial cement replacement can reduce the negative impacts on the environment. In this study, the palm oil wastes, namely Palm Oil Clinker Powder (POCP) and Palm Oil Boiler Ash (POBA), were used as partial cement replacement. A total of 60 specimens were prepared with 0%, 10%, 20%, and 30% cement replacement by POCP and POBA. The physical and mechanical properties of bricks, such as density, water absorption, voids, and compressive strength, were investigated. The results show that the brick with 20% CP and BA could be used as a severe weathering brick.","PeriodicalId":34235,"journal":{"name":"Indonesian Journal of Computing Engineering and Design","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42925972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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