ASEAN Engineering Journal最新文献

{"title":"CIRCULAR TUNNEL STRUCTURAL ANALYSIS IN SOFT GROUND","authors":"P. Shek, Z. Lee","doi":"10.11113/aej.v13.18386","DOIUrl":"https://doi.org/10.11113/aej.v13.18386","url":null,"abstract":"Analytical bedded-beam spring model is most commonly adopted in the tunnel engineering practice due to its simplicity and promising outputs. Despite many well documented literatures exist concerning about the theories and fundamentals of various methods, there is a dearth of information on the modelling framework of a bedded-beam spring and many details are often overlooked in the modelling process. The main aim of this paper is to produce the modelling framework of the bedded-beam spring model in soft ground, for both direct and indirect approaches in considering the effects of segmental joints. Particular emphasis is devoted to the modelling techniques of each components of the structural model which in turn, is able to facilitate the modelling quality and process for the practicing engineers. Reviews on the technical papers of tunneling variables as well as parameters identification for the structural analysis have been first performed followed by the comparison of the consideration adopted in the modelling techniques. Analyses have been carried out to evaluate the structural forces on the tunnel lining and the obtained results are discussed in a comparison with the field measurements and design values of the actual tunneling projects. The results suggested that the direct approach always yields greater bending moments up to i) 26% for 6+1 ring configuration and ii) 21% for 5+1 ring configuration compared to that of the indirect approach. With the presence of more number of radial joints, the differences between the approaches have the tendency to be greater. With the validated models, parametric studies including tunnel lining flexibility ratio, compressibility ratio and the soil lateral earth pressure coefficient have been performed to provide better insight on the relative importance of each of the parameters. The results of the studies suggested that with the increase in flexibility ratio, the difference between the direct and indirect approach has shown to increase from 10% to 28%.  However, insignificant influence has been observed on the axial forces regardless of the joint consideration approach a well as the compressibility ratio.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46597544","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}

{"title":"THE EFFECT OF MATERIAL STIFFNESS ON DENTAL IMPLANT STABILITY – A FINITE ELEMENT ANALYSIS","authors":"M. I. Ishak, R. Daud, S. M. Mohd Noor","doi":"10.11113/aej.v13.18087","DOIUrl":"https://doi.org/10.11113/aej.v13.18087","url":null,"abstract":"The perseverance of dental implant system in restoration of occlusion is highly dependent on biomechanical overloading factors such as implant macro geometries, parafunctional oral habits, and material. Different implant materials could affect the load transfer at the bone-implant interface differently which is related to stress shielding phenomenon. To date, the role of various implant materials on the surrounding tissues as well as implant stability is still debatable and unclear especially when the implant failure is of concern. Through this study, implant body with different materials or stiffnesses that are zirconia, Ti-6Al-4V, cpTi, TiZr, and PEEK were investigated via 3-D FEA. The bone tissues were modelled based on CT image datasets and subsequently be processed in SolidWorks software. All geometries were converted into finite element models and analysed in ANSYS software. The bone and implant models were assigned with anisotropic and isotropic properties, respectively. A dynamic occlusal loading of 300 N and pretension of 20 N were applied on the implant body and screw, respectively. The results showed that the less stiff implant increased the bone stress and decreased the implant body stress values compared to the stiffer implant. Moreover, the implant with lower stiffness exhibited lower bone strain and higher implant deformation than the implant with higher stiffness. Of all implant materials analysed, PEEK is observed to be the most satisfactory. However, further modifications on PEEK would be necessary to improve inherent bioactivity and osseointegration.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49345255","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}

{"title":"DETERMINATION OF PROCESS VARIABILITY BY USING TRIANGULAR FUZZY NUMBER TO MINIMIZE PRODUCTION LEAD TIME IN A DYNAMIC VALUE STREAM MAPPING","authors":"M. Thulasi, A. A. Faieza, A. S. Azfanizam, Z. Leman","doi":"10.11113/aej.v13.18574","DOIUrl":"https://doi.org/10.11113/aej.v13.18574","url":null,"abstract":"This paper shows the incorporation of Value Stream Mapping (VSM) with triangular fuzzy numbers to determine variability and uncertainty in a conveyor manufacturing company. VSM is a pen and paper tool which is used to indicate wastes and bottleneck processes graphically and develop an action plan to enhance the production line. However, some weaknesses are identified in the conventional VSM where it fails to consider variability in a dynamic manufacturing environment. As such, this paper fills up the research gap by using Triangular Fuzzy Number (TFN) to illustrate time intervals, inventories and other variables of VSM operation. The purpose of this paper is to minimize total production lead time (TPLT) and total value-added time (TVAT) in the current value stream of the conveyor chain. More accurate details of variability in the dynamic manufacturing environment can be illustrated by a Triangular Fuzzy Number (TFN) of VSM.  As a result, the future value stream map shows 50% and 22% reduction in TPLT and TVAT respectively compared to the current value stream. In conclusion, this paper also recommends that in order to optimize the accuracy of VSM analysis further, a discrete event simulation can be used to examine the fuzzy VSM. ","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46017424","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}

{"title":"LIGHT-TRANSMITTING CONCRETE PROPERTIES OF SHORT WALL PANEL","authors":"Tang Rong, Chiew Shing Mei, Mohammed Yahya Mohammed Al-Fasih, I. S. Ibrahim, N. N. Sarbini, K. H. Padil","doi":"10.11113/aej.v13.18433","DOIUrl":"https://doi.org/10.11113/aej.v13.18433","url":null,"abstract":"Consideration of fiber configuration and the distance between the light source or light meter and the LTC specimen in the previous studies is still limited. The incorporation of plastic optical fiber (POF) into concrete with fiber configurations of 5 ´ 5 and 6 ´ 6 grids is investigated in terms of short wall panel application to study its light intensity and strength properties. The light-transmitting concrete (LTC) short wall panel of 300 mm wide ´ 400 mm high ´ 75 mm thick is cast using self-compacting concrete (SCC) to ensure the flowability of the concrete during mixing. The fresh SCC is tested under slump flow, V-funnel, and L-box to verify its fresh properties, while compression test is carried out at 28-days on cube specimens to determine its compressive strength. Then, light transmittance and axial load test under compression are conducted for the LTC wall panel. The findings show that the light intensity of the LTC wall panel increased with the increased number of fiber configurations. However, regardless of fiber configurations, the light intensity reduced with the increase of both light source and light meter distances. In addition, the ultimate axial load of the LTC wall panel with fiber configurations of 5 ´ 5 and 6 ´ 6 grids are 662 kN and 643 kN, respectively. It implies that the fiber configuration does not affect the axial compression load. Furthermore, both LTC wall panels failed solely under pure compression load.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43708793","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}

{"title":"SPOKEN-DIGIT CLASSIFICATION USING ARTIFICIAL NEURAL NETWORK","authors":"Aunhel John M. Adoptante, A. M. Baes, John Carlo A. Catilo, Patrick Kendrex L. Lucero, Anton Louise P. De Ocampo, Alvin S. Alon, Rhowel M. Dellosa","doi":"10.11113/aej.v13.18388","DOIUrl":"https://doi.org/10.11113/aej.v13.18388","url":null,"abstract":"Audio classification has been one of the most popular applications of Artificial Neural Networks. This process is at the center of modern AI technology, such as virtual assistants, automatic speech recognition, and text-to-speech applications. There have been studies about spoken digit classification and its applications. However, to the best of the author's knowledge, very few works focusing on English spoken digit recognition that implemented ANN classification have been done. In this study, the authors utilized the Mel-Frequency Cepstral Coefficients (MFCC) features of the audio recording and Artificial Neural Network (ANN) as the classifier to recognize the spoken digit by the speaker. The Audio MNIST dataset was used as training and test data while the Free-Spoken Digit Dataset was used as additional validation data. The model showed an F-1 score of 99.56% accuracy for the test data and an F1 score of 81.92% accuracy for the validation data.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42220743","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}

{"title":"CORROSION OF GALVANISED AND UNGALVANISED COLD-FORMED STEEL IN CHLORIDE AND SULPHATE SOLUTIONS","authors":"Brandon Yi Yang Ling, Yeong Huei Lee, Shahrin Mohammad, C. Tan","doi":"10.11113/aej.v13.18564","DOIUrl":"https://doi.org/10.11113/aej.v13.18564","url":null,"abstract":"The light steel framing is widely use around the world to replace the conventional construction method. However, there are some factors that affect the corrosion rate of the steel framing structures. The factors are oxygen, humidity, sulphate, chloride and copper sulphate which highly contain in seawater regions or specifically coastal area. Hence, all these factors that influence the corrosion rate of the steel framing shall be study to determine the service life and the maintenance required throughout their service life. This paper studies the effect of the chloride, sulphate and the rainwater to the light steel framing structure and the corrosion resistance that provided by the zinc coating on the surface of the steel. The galvanized steel and ungalvanized steel are immersed in different concentration of sodium chloride and copper sulphate solutions for 28 days. The corrosion rate is obtained by measured the weight loss of the steel coupons in the interval 7-days of the immersion time. Other than that, the corrosion rate in seawater is analysed by the result of 0.5 Mol of NaCl and 0.016 Mol of CuSO4. The corrosion rate for the NaCl and CuSO4 is much higher than the corrosion rate in the rainwater. The corrosion resistance that provided by the zinc coating is extremely higher compared to the steel that without the protection. Prediction equation of metal loss from experimental study is proposed for a reliable light steel structure in a function of time.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46662188","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}

{"title":"NON-INVASIVE GRADING TECHNIQUE FOR RUBY GEMSTONE USING CHARGE-COUPLED DEVICE (CCD)","authors":"Fatinah Mohd Rahalim, J. Jamaludin, S. N. Raisin","doi":"10.11113/aej.v13.18267","DOIUrl":"https://doi.org/10.11113/aej.v13.18267","url":null,"abstract":"Ruby is one of the most popular and high-value gemstones that always attract the gemologist and jeweler in the diamond market. The wide use of ruby in various industries makes the grading of this gems more complicated due to a lot of synthetic and imitation rubies are made. The current grading techniques are mostly depending on the human visual assessment which prone to errors. This paper proposes a system that helps in grading the clarity characteristic of the ruby in non-invasive manner. The system includes a charge-coupled devices (CCD) and laser that is designed in the most suitable and effective way to conduct inspection on the light intensity of the ruby which will then determine the clarity of the ruby. CCD linear sensor is widely known as the reliable sensor especially when use in the optical system. The CCD linear sensor capture the light intensity from the ruby and convert it into the voltage value. The result shows a value of 1.7918 V obtained from the CCD linear sensor when ruby is placed in the system. This concludes that the CCD system can detect even slightest changes in the light intensity that can pass through the ruby and falls on the CCD linear sensor. The system is proven to be a reliable and effective system with 80% accuracy.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44424770","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}

{"title":"ON DIFFERENT FORMULATIONS FOR THE MULTI-PERIOD VEHICLE ROUTING PROBLEM WITH SIMULTANEOUS PICKUP AND DELIVERY","authors":"Setyo Tri Windras Mara, A. Rifai, R. Norcahyo","doi":"10.11113/aej.v13.17888","DOIUrl":"https://doi.org/10.11113/aej.v13.17888","url":null,"abstract":"In this paper, we extend the vehicle routing problem with simultaneous pickup and delivery (VRPSPD) with a consideration of multiple planning horizons. We propose three alternative mathematical formulations for Periodic-VRPSPD (P-VRPSPD) based on the available formulations for VRPSPD in the literatures, namely the three-index commodity flow formulation, four-index commodity flow formulation, and three-index vehicle flow formulation. We perform comparison analysis by conducting extensive numerical experiments on a set of instances with various complexities in order to evaluate the performance of these formulations. Overall, it is observed that the three-index commodity flow formulation returns the best results.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47071516","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}

{"title":"OPTIMUM DESIGN OF TUNED MASS DAMPER PARAMETERS TO REDUCE SEISMIC RESPONSE ON STRUCTURE USING GENETIC ALGORITHM","authors":"Dedih Suryadi, Argian Prasetya, N. Daratha, Indra Agustian","doi":"10.11113/aej.v13.17890","DOIUrl":"https://doi.org/10.11113/aej.v13.17890","url":null,"abstract":"A tuned mass damper (TMD) is a system to improve structural performance in reducing vibration response under seismic loads. This study optimizes TMD parameters using a genetic algorithm. In this study, the structure is modeled as a spring-mass system to obtain mathematical equations. Then, those equations are used to estimate vibration due to seismic loads. A genetic algorithm is used to find optimum parameters which correspond to minimum vibrations. The simulation result shows that the genetic algorithm can find values of parameters such as the ratio of mass, stiffness, and damping values ​​which reduces vibrations on the structure. Based on the tests, it is found that the best combination of genetic algorithm parameters to produce the most optimal fitness value is population size 30, generation size 800, crossover probability 0.5, and mutation probability 0.5. Applying the genetic algorithm shows that the optimal parameter ratio values of TMD ​​to reduce the vibration response are 10% mass, 10% stiffness, and 1% damping of mass, stiffness, and damping in the structure. The result of the vibration response analysis shows that the maximum amplitude value of the main structure without TMD is 0.24259 m reduced to 0.034385 m with the addition of TMD. This shows that the TMD successfully reduces vibrations in the main structure with a percentage of 85.94%. Where the TMD manages to dissipate the energy that should only be received by the structure to the TMD itself.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45617806","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}

{"title":"DETECTION AND CLASSIFICATION OF PLANT LEAF DISEASES USING DIGTAL IMAGE PROCESSING METHODS: A REVIEW","authors":"Lele Mohammed, Yusliza Yusoff","doi":"10.11113/aej.v13.17460","DOIUrl":"https://doi.org/10.11113/aej.v13.17460","url":null,"abstract":"Prediction and classification of plant leaf illnesses by farmers using conventional approaches can be unexciting and erroneous. Problems may occur while trying to predict the sort of illnesses manually. Inability to detect diseases of plants promptly could lead to the destruction of crop plants and this can cause serious decline in the yield. Losses can be prevented and yield be maximized when farmers adopt computerized image processing approaches in their farms. Numerous techniques have been proposed and used in the prediction of diseases of crop plants based on the images of the infected leaves. Researchers have in the past achieved a lot in the aspect of plant illnesses identification by exploring several techniques and models. However, improvement needs to be provided on account of reviews, new advancements and discussions. Deploying technology can greatly enhance crop production across the globe.  Different approaches and models can be trained with huge data to identify new improved methods for uncovering diseases of plants to tackle problem of low yield. Previous works have determined the robustness of various image processing techniques such as; K-means clustering, Naive Bayes, Feed forward neutral network (FFNN), Support Vector Machine (SVM), K-nearest neighbor (KNN) classifier, Fuzzy logic, Genetic Algorithm (GA), Artificial Neural Network (ANN), Convolutional Neural Network (CNN) etc. This paper provides a critical review and results of different types of approaches and methods used previously to detect and classify various types of plant leaf illnesses using image processing approaches.","PeriodicalId":36749,"journal":{"name":"ASEAN Engineering Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46543048","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}