Pub Date : 2021-01-28DOI: 10.12962/J20882033.V31I3.7016
Shirin Kordnoori, H. Mostafaei, Shaghayegh Kordnoori, M. Ostadrahimi
CDMA is an important and basic part of today’s communications technologies. This technology can be analyzed efficiently by reducing the time, computation burden, and cost by characterizing the physical layer with a Markov Model. Waveform level simulation is generally used for simulating different parts of a digital communication system. In this paper, we introduce two different mathematical methods to model digital communication channels. Hidden Markov and Semi Hidden Markov models’ applications have been investigated for evaluating the DS-CDMA link performance with different parameters. Hidden Markov Models have been a powerful mathematical tool that can be applied as models of discrete-time series in many fields successfully. A semi-hidden Markov model as a stochastic process is a modification of hidden Markov models with states that are no longer unobservable and less hidden. A principal characteristic of this mathematical model is statistical inertia, which admits the generation, and analysis of observation symbol contains frequent runs. The SHMMs cause a substantial reduction in the model parameter set. Therefore in most cases, these models are computationally more efficient models compared to HMMs. After 30 iterations for different Number of Interferers, all parameters have been estimated as the likelihood become constant by the Baum Welch algorithm. It has been demonstrated that by employing these two models for different Numbers of Interferers and Number of symbols, Error sequences can be generated, which are statistically the same as the sequences derived from the CDMA simulation. An excellent match confirms both models’ reliability to those of the underlying CDMA-based physical layer.
{"title":"Evaluating the CDMA System Using Hidden Markov and Semi Hidden Markov Models","authors":"Shirin Kordnoori, H. Mostafaei, Shaghayegh Kordnoori, M. Ostadrahimi","doi":"10.12962/J20882033.V31I3.7016","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.7016","url":null,"abstract":"CDMA is an important and basic part of today’s communications technologies. This technology can be analyzed efficiently by reducing the time, computation burden, and cost by characterizing the physical layer with a Markov Model. Waveform level simulation is generally used for simulating different parts of a digital communication system. In this paper, we introduce two different mathematical methods to model digital communication channels. Hidden Markov and Semi Hidden Markov models’ applications have been investigated for evaluating the DS-CDMA link performance with different parameters. Hidden Markov Models have been a powerful mathematical tool that can be applied as models of discrete-time series in many fields successfully. A semi-hidden Markov model as a stochastic process is a modification of hidden Markov models with states that are no longer unobservable and less hidden. A principal characteristic of this mathematical model is statistical inertia, which admits the generation, and analysis of observation symbol contains frequent runs. The SHMMs cause a substantial reduction in the model parameter set. Therefore in most cases, these models are computationally more efficient models compared to HMMs. After 30 iterations for different Number of Interferers, all parameters have been estimated as the likelihood become constant by the Baum Welch algorithm. It has been demonstrated that by employing these two models for different Numbers of Interferers and Number of symbols, Error sequences can be generated, which are statistically the same as the sequences derived from the CDMA simulation. An excellent match confirms both models’ reliability to those of the underlying CDMA-based physical layer.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85873933","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 : 2021-01-28DOI: 10.12962/J20882033.V31I3.7077
W. M. T. Atmadja, H. Parung, R. Irmawaty, A. Amiruddin
Piping modifications Polyvinyl Chloride as forming a hollow cavity in the concrete slab is one alternative to reduce the self-weight of structure. The placement of PVC pipe that has been modified on the concrete tensile area is expected not to reduce the bending strength of the plate. In the study, the analysis was compared to reinforced concrete slab massive (PB-1) with a hollow reinforced concrete slab PVC (PB-2) with the same thickness and compared well with hollow reinforced concrete slab PVC (PB-3) with an equal volume of the concrete slab massive reinforced (PB-1). All test objects have the same dimensions, including the number and spacing of reinforcement. The analysis method of the moment coefficient obtained flexural strength of PB-1 amounted to 328.175 kN, plate PB-2 amounted to 329.624 kN, and the plate of PB-3 amounted to 387.184 kN. While the results of the analysis using the Navier method deflections values obtained for the plate PB-1, PB-2, and PB-3 are 0.0948 mm, 0.33952 mm, and 0.04267 mm, respectively. Shear forces values for plate PB-1, PB-2 and PB-3 is 965.908 kN, 231.818 kN and 281.429 kN respectively.
{"title":"Flexural and Shear Behaviour of Reinforced Concrete Slab With PVC Pipe as A Cavity Forming in Two-Way System","authors":"W. M. T. Atmadja, H. Parung, R. Irmawaty, A. Amiruddin","doi":"10.12962/J20882033.V31I3.7077","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.7077","url":null,"abstract":"Piping modifications Polyvinyl Chloride as forming a hollow cavity in the concrete slab is one alternative to reduce the self-weight of structure. The placement of PVC pipe that has been modified on the concrete tensile area is expected not to reduce the bending strength of the plate. In the study, the analysis was compared to reinforced concrete slab massive (PB-1) with a hollow reinforced concrete slab PVC (PB-2) with the same thickness and compared well with hollow reinforced concrete slab PVC (PB-3) with an equal volume of the concrete slab massive reinforced (PB-1). All test objects have the same dimensions, including the number and spacing of reinforcement. The analysis method of the moment coefficient obtained flexural strength of PB-1 amounted to 328.175 kN, plate PB-2 amounted to 329.624 kN, and the plate of PB-3 amounted to 387.184 kN. While the results of the analysis using the Navier method deflections values obtained for the plate PB-1, PB-2, and PB-3 are 0.0948 mm, 0.33952 mm, and 0.04267 mm, respectively. Shear forces values for plate PB-1, PB-2 and PB-3 is 965.908 kN, 231.818 kN and 281.429 kN respectively.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"325 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86775481","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 : 2021-01-28DOI: 10.12962/J20882033.V31I3.7606
Achmad An'im Fahmi, D. Siahaan
Noise in a Software Requirements Specification (SRS) is an irrelevant requirements statement or a non-requirements statement. This can be confusing to the reader and can have negative repercussions in later stages of software development. This study proposes a classification model to detect the second type of noise, the non-requirements statement. The classification model that is built is based on the semantic features of the non-requirements statement. This research also compares the five best-supervised machine learning methods to date, which are support vector machine (SVM), naive Bayes (NB), random forest (RF), k-nearest neighbor (kNN), and Decision Tree. This comparison aimed to determine which method can produce the best non-requirements classification, model. The comparison shows that the best model is produced by the SVM method with an average accuracy of 0.96. The most significant features in this non-requirement classification model are the requirements statement or non-requirements, id statement, normalized mean value, standard deviation value, similarity variant value, standard deviation normalization value, maximum normalized value, similarity variant normalization value, value Bad NN, mean value, number of sentences, bad VB score, and project id.
{"title":"Algorithms Comparison for Non-Requirements Classification using the Semantic Feature of Software Requirement Statements","authors":"Achmad An'im Fahmi, D. Siahaan","doi":"10.12962/J20882033.V31I3.7606","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.7606","url":null,"abstract":"Noise in a Software Requirements Specification (SRS) is an irrelevant requirements statement or a non-requirements statement. This can be confusing to the reader and can have negative repercussions in later stages of software development. This study proposes a classification model to detect the second type of noise, the non-requirements statement. The classification model that is built is based on the semantic features of the non-requirements statement. This research also compares the five best-supervised machine learning methods to date, which are support vector machine (SVM), naive Bayes (NB), random forest (RF), k-nearest neighbor (kNN), and Decision Tree. This comparison aimed to determine which method can produce the best non-requirements classification, model. The comparison shows that the best model is produced by the SVM method with an average accuracy of 0.96. The most significant features in this non-requirement classification model are the requirements statement or non-requirements, id statement, normalized mean value, standard deviation value, similarity variant value, standard deviation normalization value, maximum normalized value, similarity variant normalization value, value Bad NN, mean value, number of sentences, bad VB score, and project id.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85372435","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 : 2021-01-01DOI: 10.12962/j20882033.v32i3.13005
Fajar Baskoro, Rasi Aziizah Andrahsmara, Brian Rizqi Paradisiaca Darnoto, Yoga Ari Tofan
{"title":"A Systematic Comparison of Software Requirements Classification","authors":"Fajar Baskoro, Rasi Aziizah Andrahsmara, Brian Rizqi Paradisiaca Darnoto, Yoga Ari Tofan","doi":"10.12962/j20882033.v32i3.13005","DOIUrl":"https://doi.org/10.12962/j20882033.v32i3.13005","url":null,"abstract":"","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76711896","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 : 2020-12-14DOI: 10.12962/J20882033.V31I3.5236
M. Ojebode, B. I. Akhigbe
We are currently on the cusp of a digital era when people engage Internet services (Int-Sevs) ceaselessly for sundry purposes such as learning, teaching, and research. However, the lack of sufficient understanding of user satisfaction still poses a huge challenge to Int-Sevs adaption to users’ dynamic needs and the provision of required services in real-time within the university’s context. This understanding is needful concerning what influences the performance of the Int-Sevs of a university. This paper, therefore, analyses the user log of about 65000 log items generated by 120 users of a university’s internet services that were collected over three months. The mixed-method approach was adopted. Thus, the two-step clustering and crosstabulation techniques were applied to identify natural groupings and examine them for existing relationships (respectively) to determine the existence of user satisfaction. The results showed a significant association and relationship between user satisfaction and Key Performance Indicators (KPIs). The study concluded that with data and efficient techniques, KPIs with user-centric criteria like user satisfaction could be investigated to find what influences the performance of a university’s IntSevs. The quality of users’ experience was omitted and left to be considered in the future in a conceivably longitudinal study.
{"title":"Users’ Satisfaction with Internet Service Performance-Based on User Log","authors":"M. Ojebode, B. I. Akhigbe","doi":"10.12962/J20882033.V31I3.5236","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.5236","url":null,"abstract":"We are currently on the cusp of a digital era when people engage Internet services (Int-Sevs) ceaselessly for sundry purposes such as learning, teaching, and research. However, the lack of sufficient understanding of user satisfaction still poses a huge challenge to Int-Sevs adaption to users’ dynamic needs and the provision of required services in real-time within the university’s context. This understanding is needful concerning what influences the performance of the Int-Sevs of a university. This paper, therefore, analyses the user log of about 65000 log items generated by 120 users of a university’s internet services that were collected over three months. The mixed-method approach was adopted. Thus, the two-step clustering and crosstabulation techniques were applied to identify natural groupings and examine them for existing relationships (respectively) to determine the existence of user satisfaction. The results showed a significant association and relationship between user satisfaction and Key Performance Indicators (KPIs). The study concluded that with data and efficient techniques, KPIs with user-centric criteria like user satisfaction could be investigated to find what influences the performance of a university’s IntSevs. The quality of users’ experience was omitted and left to be considered in the future in a conceivably longitudinal study.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81090775","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 : 2020-11-20DOI: 10.12962/J20882033.V31I3.5580
P. M. Dewi, I. N. Antaryama, I. Defiana
Rapid development of high-rise apartments, which rely on mechanical cooling, would increase energy consumption. Courtyard existed in various geometries of a high-rise apartment in Surabaya as a result of useful layout configuration. The courtyard is one of the passive cooling strategies in vernacular building and is reported to reduce a building’s energy consumption. The size of the courtyard affects the performance of the courtyard. In high-rise courtyard apartments in Surabaya, there is a wide variation of building width and length, affecting the courtyard aspect ratio. This paper investigates the result of annual cooling energy of different courtyard aspect ratio on five apartment geometries with courtyard: H Geometry, U Geometry, Double U Geometry, Double L Geometry, and Quadruple L Geometry. The method of this research is experimental research with simulation as a tactic. Design-Builder by EnergyPlus is used as simulation tools in this research. The result reveals that a courtyard with an aspect ratio of 1:2 tends to perform better than a square courtyard. Elongating the courtyard of H and U Geometry would reduce the annual cooling energy in all orientations. Elongating the courtyard of Double U, Double L, and Quadruple L Geometries would reduce the annual cooling energy in northwest-southeast orientation and increase annual cooling energy if the building is elongated alongside the northeast axis..
{"title":"Effect of Courtyard Aspect Ratio on Annual Cooling Energy of Highrise Apartment in Surabaya","authors":"P. M. Dewi, I. N. Antaryama, I. Defiana","doi":"10.12962/J20882033.V31I3.5580","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.5580","url":null,"abstract":"Rapid development of high-rise apartments, which rely on mechanical cooling, would increase energy consumption. Courtyard existed in various geometries of a high-rise apartment in Surabaya as a result of useful layout configuration. The courtyard is one of the passive cooling strategies in vernacular building and is reported to reduce a building’s energy consumption. The size of the courtyard affects the performance of the courtyard. In high-rise courtyard apartments in Surabaya, there is a wide variation of building width and length, affecting the courtyard aspect ratio. This paper investigates the result of annual cooling energy of different courtyard aspect ratio on five apartment geometries with courtyard: H Geometry, U Geometry, Double U Geometry, Double L Geometry, and Quadruple L Geometry. The method of this research is experimental research with simulation as a tactic. Design-Builder by EnergyPlus is used as simulation tools in this research. The result reveals that a courtyard with an aspect ratio of 1:2 tends to perform better than a square courtyard. Elongating the courtyard of H and U Geometry would reduce the annual cooling energy in all orientations. Elongating the courtyard of Double U, Double L, and Quadruple L Geometries would reduce the annual cooling energy in northwest-southeast orientation and increase annual cooling energy if the building is elongated alongside the northeast axis..","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89354207","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 : 2020-11-20DOI: 10.12962/J20882033.V31I3.5596
Gabriel Ghewa, P. Suprobo, D. Irawan, Sutrisno Wahyuniarsih, Tambusay Asdam
Concrete’s durability is the key factor that affects the service life of the concrete structure. One factor that affects the durability properties of concrete is its pore structure, which can be investigated by analyzing the materials’ absorption rate. For the struc-tures with direct contact with water, water absorption can change the pore structure’s behavior, affecting the durability of the conc in the long term rate. It is important to research to find the water absorption properties of concrete with different mixtures. This research investigates the rate of absorption of concrete by using fly ash and silica fume. Based on secondary absorption properties, the result shows that 15% fly ash in normal concrete increases the resistance to water penetration by 23%. The usage of 5% Silica Fume increases the resistance by 11.8%. The usage of 5% silica fume + 10% fly ash increases the resistance by 16.2%. It shows that the use of supplementary materials in concrete increases the resistance of water penetration. In this research, the usage of 15% fly ash as cement replacement shows the best result.
{"title":"Investigation of Water Absorption for Concrete Using Supplementary Materials","authors":"Gabriel Ghewa, P. Suprobo, D. Irawan, Sutrisno Wahyuniarsih, Tambusay Asdam","doi":"10.12962/J20882033.V31I3.5596","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.5596","url":null,"abstract":"Concrete’s durability is the key factor that affects the service life of the concrete structure. One factor that affects the durability properties of concrete is its pore structure, which can be investigated by analyzing the materials’ absorption rate. For the struc-tures with direct contact with water, water absorption can change the pore structure’s behavior, affecting the durability of the conc in the long term rate. It is important to research to find the water absorption properties of concrete with different mixtures. This research investigates the rate of absorption of concrete by using fly ash and silica fume. Based on secondary absorption properties, the result shows that 15% fly ash in normal concrete increases the resistance to water penetration by 23%. The usage of 5% Silica Fume increases the resistance by 11.8%. The usage of 5% silica fume + 10% fly ash increases the resistance by 16.2%. It shows that the use of supplementary materials in concrete increases the resistance of water penetration. In this research, the usage of 15% fly ash as cement replacement shows the best result.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"49 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76648488","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 : 2020-11-20DOI: 10.12962/J20882033.V31I3.5595
C. J. Wijaya
The modification of cellulose nanocrystals (CNCs) using rarasaponins (RSs) was carried out to enhancing the hydrophobicity of the CNCs. The RSs are a natural surfactant that has hydrophilic and hydrophobic sides. The linked RSs on the CNCs surface can be used to bond the hydrophobic drugs so that the modified CNCs can be applied as the hydrophobic drugs carrier in the medical field. The kinetics study was successfully carried out using the Elovich equation as the modelling equation. The Elovich equation fits the modification results well based on two parameters, i.e. the RSs/CNCs ratios and the times. The dispersion characteristics analysis was carried out to figure the enhancement of the hydrophobicity on the modified CNCs compared to the unmodified CNCs. According to the kinetics study and the dispersion characteristics analysis, the modification of CNCs using RSs could be used to enhance the application of CNCs utilization in the hydrophobic drugs delivery system.
{"title":"Kinetics Study of Cellulose Nanocrystals Modification Using Rarasaponins by Elovich Equation","authors":"C. J. Wijaya","doi":"10.12962/J20882033.V31I3.5595","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.5595","url":null,"abstract":"The modification of cellulose nanocrystals (CNCs) using rarasaponins (RSs) was carried out to enhancing the hydrophobicity of the CNCs. The RSs are a natural surfactant that has hydrophilic and hydrophobic sides. The linked RSs on the CNCs surface can be used to bond the hydrophobic drugs so that the modified CNCs can be applied as the hydrophobic drugs carrier in the medical field. The kinetics study was successfully carried out using the Elovich equation as the modelling equation. The Elovich equation fits the modification results well based on two parameters, i.e. the RSs/CNCs ratios and the times. The dispersion characteristics analysis was carried out to figure the enhancement of the hydrophobicity on the modified CNCs compared to the unmodified CNCs. According to the kinetics study and the dispersion characteristics analysis, the modification of CNCs using RSs could be used to enhance the application of CNCs utilization in the hydrophobic drugs delivery system.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73838337","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 : 2020-11-20DOI: 10.12962/J20882033.V31I3.5655
C. Nugroho, T. Pitana, Bagus Dinariyana
Shipyard is an industry engaged in the maintenance and repair of ship and construction of a new ship. In ship repair operations, there are many activities in this operation. Propeller inspection, blasting, replating, welding, general work, electric work is an activity in ship repair operation. This research proposed a methodology to risk analysis ship maintenance operation, integrating Job Safety Analysis (JSA) with Bayesian Network (BN) and Fuzzy Inferences System (FIS). JSA method is used to find the hazards and the consequences of the maintenance operation. BN is developed for probability calculating of likelihood factors. Meanwhile, the FIS are used as a method to calculate the risk level. The FIS using Mamdani algorithm based on expert’s knowledge and experience. The integration of three methods is use too complete the risk assessment for replating activities . The proposed method is used to find out the risk level of replating activity on ship maintenance. Based on the result, the proposed model is more accurate, precise, and flexible depend on the basic factor that influence the operation. It will help to reduce the potential accident on operation. This proposed method could be the other option as a tool to calculate risk assessment in other operations .
{"title":"Risk Analysis Using Job Safety Analysis-Fuzzy Integration for Ship Maintenance Operation","authors":"C. Nugroho, T. Pitana, Bagus Dinariyana","doi":"10.12962/J20882033.V31I3.5655","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.5655","url":null,"abstract":"Shipyard is an industry engaged in the maintenance and repair of ship and construction of a new ship. In ship repair operations, there are many activities in this operation. Propeller inspection, blasting, replating, welding, general work, electric work is an activity in ship repair operation. This research proposed a methodology to risk analysis ship maintenance operation, integrating Job Safety Analysis (JSA) with Bayesian Network (BN) and Fuzzy Inferences System (FIS). JSA method is used to find the hazards and the consequences of the maintenance operation. BN is developed for probability calculating of likelihood factors. Meanwhile, the FIS are used as a method to calculate the risk level. The FIS using Mamdani algorithm based on expert’s knowledge and experience. The integration of three methods is use too complete the risk assessment for replating activities . The proposed method is used to find out the risk level of replating activity on ship maintenance. Based on the result, the proposed model is more accurate, precise, and flexible depend on the basic factor that influence the operation. It will help to reduce the potential accident on operation. This proposed method could be the other option as a tool to calculate risk assessment in other operations .","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"219 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76599548","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 : 2020-08-27DOI: 10.12962/J20882033.V31I2.6330
Pemila Mawaddah, Banggen Huang, Chin-Hsin Chang
The development and commercialization of new technologies have inherent uncertainties and associated risks. Many researches conducted by Indonesian R&Ds never reached the diffusion stage, i.e., the commercialization process. Therefore, Indonesia needs a strategy to translate promising technologies into a stream of economic returns for its stakeholders. This study analyzes the critical success factors (KSF) for commercializing innovation. It used new product development literature and TOE (technology–organization– environment) framework and developed a research model to investigate the determinants of commercialization of innovation. In choosing the selected vital success factors, a hierarchy of KSFs was defined. It also used the Analytic hierarchy process to help experts rank the importance of identified KSFs. The KSF hierarchy is constructed with two levels: a critical comprising three dimensions and a detailed level of nine individual factors. The result shows that the experts believe that in the top-level, technology is the most critical dimension followed by environment and organization. Technology is the primary consideration for the company before launching their product to the market. Market demand has the highest rank from the environmental dimension. Lastly, experts suggest that the organization network is the most significant to grasp investors and potential markets for successful commercialization.
{"title":"Analysis of the Key Success Factors for Commercializing Innovation","authors":"Pemila Mawaddah, Banggen Huang, Chin-Hsin Chang","doi":"10.12962/J20882033.V31I2.6330","DOIUrl":"https://doi.org/10.12962/J20882033.V31I2.6330","url":null,"abstract":"The development and commercialization of new technologies have inherent uncertainties and associated risks. Many researches conducted by Indonesian R&Ds never reached the diffusion stage, i.e., the commercialization process. Therefore, Indonesia needs a strategy to translate promising technologies into a stream of economic returns for its stakeholders. This study analyzes the critical success factors (KSF) for commercializing innovation. It used new product development literature and TOE (technology–organization– environment) framework and developed a research model to investigate the determinants of commercialization of innovation. In choosing the selected vital success factors, a hierarchy of KSFs was defined. It also used the Analytic hierarchy process to help experts rank the importance of identified KSFs. The KSF hierarchy is constructed with two levels: a critical comprising three dimensions and a detailed level of nine individual factors. The result shows that the experts believe that in the top-level, technology is the most critical dimension followed by environment and organization. Technology is the primary consideration for the company before launching their product to the market. Market demand has the highest rank from the environmental dimension. Lastly, experts suggest that the organization network is the most significant to grasp investors and potential markets for successful commercialization.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"31 1","pages":"111-126"},"PeriodicalIF":0.0,"publicationDate":"2020-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45412689","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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