Pub Date : 2023-07-31DOI: 10.15866/ireme.v17i7.23854
Dewi Mustamiah, Nuddin Harahab, Marjono Marjono, Hagus Tarno
Humans rely heavily on the sea for their survival. The ecosystem and the health of the sea should be protected. In fact, the great intensity of the cruise's pollution-related consequences makes it vital for students to have their own marine environmental awareness so they can understand how the sea is affected by pollution. This study aims to analyse the factors affecting marine environmental awareness by using method Structural Equation Modeling (SEM) analysis in order to describe linkages connection between variable observation and latent variables. The research results show that the most influential factor on marine environmental awareness is knowledge of the marine environment. Intention guard health environment sea affects positively marine environmental awareness. Perceived Behavioral Controls affect positively intention guard health environment sea and beyond influential towards marine environmental awareness. Responsibility feeling will influence ecological behavioral intentions. Marine environmental awareness is also influenced by subjective norms. Attitudes towards the marine environment have little effect both on the intention to maintain the health of the marine environment and on marine environmental awareness.
{"title":"Heterogeneity in the Association Marine Environmental Awareness: an Approach of Structural Equation Modeling","authors":"Dewi Mustamiah, Nuddin Harahab, Marjono Marjono, Hagus Tarno","doi":"10.15866/ireme.v17i7.23854","DOIUrl":"https://doi.org/10.15866/ireme.v17i7.23854","url":null,"abstract":"Humans rely heavily on the sea for their survival. The ecosystem and the health of the sea should be protected. In fact, the great intensity of the cruise's pollution-related consequences makes it vital for students to have their own marine environmental awareness so they can understand how the sea is affected by pollution. This study aims to analyse the factors affecting marine environmental awareness by using method Structural Equation Modeling (SEM) analysis in order to describe linkages connection between variable observation and latent variables. The research results show that the most influential factor on marine environmental awareness is knowledge of the marine environment. Intention guard health environment sea affects positively marine environmental awareness. Perceived Behavioral Controls affect positively intention guard health environment sea and beyond influential towards marine environmental awareness. Responsibility feeling will influence ecological behavioral intentions. Marine environmental awareness is also influenced by subjective norms. Attitudes towards the marine environment have little effect both on the intention to maintain the health of the marine environment and on marine environmental awareness.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358374","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 : 2023-07-31DOI: 10.15866/ireme.v17i7.22921
Mohamed Ali Essa
Photovoltaic panels are considered as one of the most used renewable energy conversion systems from solar energy for its compactness and ease of installation and. One of the big problems facing the efficiency of such systems is its deterioration at high temperatures. This research presents a perpendicular flow cooling system for the PV module as photovoltaic- thermal system. The thermal module under consideration uses compact design and efficient cool. The fluid used is tap water with five flow rates in the range between 0.012 and 0.106 LPM. The system has been tested under radiation intensities ranging from 400 to 1000 W/m2. The cooling jets have been distributed in structured and unstructured schemes. It has been found out that the enhancement in the electrical efficiency reaches 0.62% at the maximum flow rate and maximum radiation intensity, with a decrease of the PV temperature of 11.33 °C. The jet distribution has not affected the value of the electrical efficiency as it gives the same average panel’s temperature. The thermal efficiency reaches 44.9% with the maximum flow rate and maximum irradiance power at the unstructured jet distribution. The maximum overall efficiency has been achieved at the same conditions of the maximum thermal efficiency with a value of 58.83%.
{"title":"Effect of Some Parameters Related to the PV Cooling with Impingement Jets: a Numerical Investigation","authors":"Mohamed Ali Essa","doi":"10.15866/ireme.v17i7.22921","DOIUrl":"https://doi.org/10.15866/ireme.v17i7.22921","url":null,"abstract":"Photovoltaic panels are considered as one of the most used renewable energy conversion systems from solar energy for its compactness and ease of installation and. One of the big problems facing the efficiency of such systems is its deterioration at high temperatures. This research presents a perpendicular flow cooling system for the PV module as photovoltaic- thermal system. The thermal module under consideration uses compact design and efficient cool. The fluid used is tap water with five flow rates in the range between 0.012 and 0.106 LPM. The system has been tested under radiation intensities ranging from 400 to 1000 W/m2. The cooling jets have been distributed in structured and unstructured schemes. It has been found out that the enhancement in the electrical efficiency reaches 0.62% at the maximum flow rate and maximum radiation intensity, with a decrease of the PV temperature of 11.33 °C. The jet distribution has not affected the value of the electrical efficiency as it gives the same average panel’s temperature. The thermal efficiency reaches 44.9% with the maximum flow rate and maximum irradiance power at the unstructured jet distribution. The maximum overall efficiency has been achieved at the same conditions of the maximum thermal efficiency with a value of 58.83%.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358377","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}
Global integration of domestic and foreign manufacturers has led to an increase in the use of foreign equipment in the domestic industry of the Republic of Kazakhstan (RK). In this regard, new materials with different chemical compositions and mechanical properties are used increasingly in production. When machining such materials, difficulties associated with the choice of cutting modes, tooling, and technological equipment will appear due to the lack of appropriate recommendations in the available reference and technical sources and normative documents. One such material is HARDOX steel. This paper presents the results of experimental studies of the machinability of HARDOX steel and computer simulation of the thermal friction cutting process. By means of computer modelling, the information on temperature distribution in the "tool-workpiece" contact zone during thermal friction cutting of HARDOX 450 steel has been obtained. The results of experimental studies have shown that by determining the optimal cutting modes it is possible to achieve high-quality indicators of machined surfaces and to control the process of thermal friction cutting, in particular the size of burrs. The results of the computer modelling have shown that cutting modes differently affect the temperature of the sub-contact surface and the temperature can reach the recrystallization temperature. It has been found out that machining at optimal modes (n = 1800 rpm, S = 35 mm/min) provides the invariability of physical and mechanical properties of the machined surface for steel HARDOX 450.
国内外制造商的全球一体化已导致哈萨克斯坦共和国(RK)国内工业增加使用外国设备。在这方面，具有不同化学成分和机械性能的新材料越来越多地用于生产。在加工此类材料时，由于在可用的参考资料、技术来源和规范文件中缺乏适当的建议，将出现与选择切削模式、工具和技术设备相关的困难。其中一种材料是HARDOX钢。本文介绍了HARDOX钢可加工性的实验研究和热摩擦切削过程的计算机模拟结果。通过计算机模拟，得到了HARDOX 450钢热摩擦切削过程中“刀-工件”接触区的温度分布信息。实验研究结果表明，通过确定最佳切削模式，可以获得加工表面的高质量指标，并控制热摩擦切削过程，特别是毛刺的大小。计算机模拟结果表明，不同的切削方式对亚接触面温度有不同的影响，其温度可达到再结晶温度。已经发现，在最佳模式下(n = 1800 rpm, S = 35 mm/min)的加工可以为HARDOX 450钢的加工表面提供物理和机械性能的不变性。
{"title":"Experimental Study and Computer Modelling of Thermal Friction Treatment Process of the HARDOX 450 Steel","authors":"Isa Kuanov, Karibek Sherov, Muratbek Usserbayev, Medgat Mussayev, Gulnur Abdugaliyeva, Saule Ainabekova, Aiym Yessirkepova, Zhassulan Alipbayev, Abdikarim Karazhanov","doi":"10.15866/ireme.v17i7.23773","DOIUrl":"https://doi.org/10.15866/ireme.v17i7.23773","url":null,"abstract":"Global integration of domestic and foreign manufacturers has led to an increase in the use of foreign equipment in the domestic industry of the Republic of Kazakhstan (RK). In this regard, new materials with different chemical compositions and mechanical properties are used increasingly in production. When machining such materials, difficulties associated with the choice of cutting modes, tooling, and technological equipment will appear due to the lack of appropriate recommendations in the available reference and technical sources and normative documents. One such material is HARDOX steel. This paper presents the results of experimental studies of the machinability of HARDOX steel and computer simulation of the thermal friction cutting process. By means of computer modelling, the information on temperature distribution in the \"tool-workpiece\" contact zone during thermal friction cutting of HARDOX 450 steel has been obtained. The results of experimental studies have shown that by determining the optimal cutting modes it is possible to achieve high-quality indicators of machined surfaces and to control the process of thermal friction cutting, in particular the size of burrs. The results of the computer modelling have shown that cutting modes differently affect the temperature of the sub-contact surface and the temperature can reach the recrystallization temperature. It has been found out that machining at optimal modes (n = 1800 rpm, S = 35 mm/min) provides the invariability of physical and mechanical properties of the machined surface for steel HARDOX 450.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358379","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 : 2023-07-31DOI: 10.15866/ireme.v17i7.22781
Perwita Kurniawan, Cahyo Budiyantoro
Nominal Characteristic Trajectory Following (NCTF) system is a simple control system. This control system comprises a Nominal Characteristic Trajectory (NCT) and a compensator. The practical aspect of an NCTF control system is obtained by manufacturing controllers based on simple open-loop experiments. Arduino Uno is used as the system controller. The study has been conducted to obtain the best type of NCT based on the NCTF proportional integral applied by the one mass of the vertical eccentric rotary system. MATLAB® software commands Arduino Uno to drive the motor and read the encoder. The system's performance can be seen by conducting tests on various types of NCT, by using variations of the angular destination position with 0.01-second sampling time. The variations of angular destination position consist of 0.785, 1.57, and 2.355 radians. Information on steady-state error, settling time, and overshoot would be analyzed to determine the best recording method of the NCT for one mass vertical eccentric rotation mechanism and the system's robustness. The results have showed that the NCTF control system based on proportional integral has performed best when using the NCT unload recorded type. This system has become a robust control system with a maximum value of steady-state error of 0.93%. The best response speed is determined by the smaller settling time value with a maximum time of 2 s. However, the overshoot is still emerging during the experiment as the typical reaction from the inertia moment of the imposition. Based on this research, it can be concluded that it is possible to use Arduino Uno as a DC motor controller on an eccentric arm with an NCTF system.
{"title":"Design and Implementation of NCTF Controller for Vertical Eccentric Rotary Positioning System","authors":"Perwita Kurniawan, Cahyo Budiyantoro","doi":"10.15866/ireme.v17i7.22781","DOIUrl":"https://doi.org/10.15866/ireme.v17i7.22781","url":null,"abstract":"Nominal Characteristic Trajectory Following (NCTF) system is a simple control system. This control system comprises a Nominal Characteristic Trajectory (NCT) and a compensator. The practical aspect of an NCTF control system is obtained by manufacturing controllers based on simple open-loop experiments. Arduino Uno is used as the system controller. The study has been conducted to obtain the best type of NCT based on the NCTF proportional integral applied by the one mass of the vertical eccentric rotary system. MATLAB® software commands Arduino Uno to drive the motor and read the encoder. The system's performance can be seen by conducting tests on various types of NCT, by using variations of the angular destination position with 0.01-second sampling time. The variations of angular destination position consist of 0.785, 1.57, and 2.355 radians. Information on steady-state error, settling time, and overshoot would be analyzed to determine the best recording method of the NCT for one mass vertical eccentric rotation mechanism and the system's robustness. The results have showed that the NCTF control system based on proportional integral has performed best when using the NCT unload recorded type. This system has become a robust control system with a maximum value of steady-state error of 0.93%. The best response speed is determined by the smaller settling time value with a maximum time of 2 s. However, the overshoot is still emerging during the experiment as the typical reaction from the inertia moment of the imposition. Based on this research, it can be concluded that it is possible to use Arduino Uno as a DC motor controller on an eccentric arm with an NCTF system.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358378","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 : 2023-07-31DOI: 10.15866/ireme.v17i7.23455
Yousif Ali Al-Dubaisi, Hussein Muhammed Al-Khafaji, Ahmed Adnan Shandookh
Myoelectric prosthetic hands are necessary devices psychologically and physically for amputees. Most of these devices are very expensive, which makes them not available to everyone. This research has aimed to create a low-cost motorized prosthetic hand by using a 3D-printed material with five movable fingers. The hand mechanism finger has been based on five degrees of freedom, and three joints controlled by servo motors have been used to move it. The hand has been evaluated with 10 different gripping patterns for daily activities. The results of the grasping and movability are to be utilized as an affordable myoelectric prosthetic hand. Moreover, it is lightweight and has low cost and ease of up keeping, besides the simplicity of production.
{"title":"Low-Cost Myoelectric Prosthetic Hand Design and Fabrication","authors":"Yousif Ali Al-Dubaisi, Hussein Muhammed Al-Khafaji, Ahmed Adnan Shandookh","doi":"10.15866/ireme.v17i7.23455","DOIUrl":"https://doi.org/10.15866/ireme.v17i7.23455","url":null,"abstract":"Myoelectric prosthetic hands are necessary devices psychologically and physically for amputees. Most of these devices are very expensive, which makes them not available to everyone. This research has aimed to create a low-cost motorized prosthetic hand by using a 3D-printed material with five movable fingers. The hand mechanism finger has been based on five degrees of freedom, and three joints controlled by servo motors have been used to move it. The hand has been evaluated with 10 different gripping patterns for daily activities. The results of the grasping and movability are to be utilized as an affordable myoelectric prosthetic hand. Moreover, it is lightweight and has low cost and ease of up keeping, besides the simplicity of production.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358375","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 : 2023-07-31DOI: 10.15866/ireme.v17i7.24102
Widodo Widodo, Abdul Ghofur, Arifin Arifin, Sahlan Sahlan, Mochamad Saiful
A ship model test is considered one of the most effective methods of determining the size of a ship's drag, where the ship's shape factor determines the ship's drag at full scale. The use of the Prohaska method to determine the value of the form factor can be carried out experimentally by drawing a ship model in the towing tank basin with a Fr of 0.1-0.2. This research is a continuation of the research of Widodo et al. by utilizing the main ship data such as LWL, B, CB, CP, CM, WSA, T, and ∆. The S-estimation RLS method is used. In this method, the error value obtained is 0.1-3%, which is a bias value between the actual and the predicted values. This very small bias value can be used as a reference for using the regression equation in order to obtain form factor values as an alternative to the Prohaska method. Subsequent research is the process of validating the form factor from the s-estimation RLS and the Prohaska method through the displacement ship model resistance test data.
{"title":"Ship Displacement Form Factor Prediction Through the Application of the Robust Least Squares Method","authors":"Widodo Widodo, Abdul Ghofur, Arifin Arifin, Sahlan Sahlan, Mochamad Saiful","doi":"10.15866/ireme.v17i7.24102","DOIUrl":"https://doi.org/10.15866/ireme.v17i7.24102","url":null,"abstract":"A ship model test is considered one of the most effective methods of determining the size of a ship's drag, where the ship's shape factor determines the ship's drag at full scale. The use of the Prohaska method to determine the value of the form factor can be carried out experimentally by drawing a ship model in the towing tank basin with a Fr of 0.1-0.2. This research is a continuation of the research of Widodo et al. by utilizing the main ship data such as LWL, B, CB, CP, CM, WSA, T, and ∆. The S-estimation RLS method is used. In this method, the error value obtained is 0.1-3%, which is a bias value between the actual and the predicted values. This very small bias value can be used as a reference for using the regression equation in order to obtain form factor values as an alternative to the Prohaska method. Subsequent research is the process of validating the form factor from the s-estimation RLS and the Prohaska method through the displacement ship model resistance test data.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358376","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 : 2023-06-30DOI: 10.15866/ireme.v17i6.23626
Hayder Sami Alam, Fathi Adul-Sahib Alshmaa
The main objective of this study is to evaluate the effect of incorporating Carbon Nanotubes (CNTs) into electroplating and electroless plating processes on the mechanical properties of aluminum alloy 2024 T3. The experimental approach involved adding pure Multi-Walled Carbon Nanotubes (MWCNTs) at a ratio of 2 g/L during the Ni-CNT coating process. Electroplating and electroless plating processes were applied to the specimens under specific conditions, including current, voltage, mixing speed, and temperature for both types of coating used. Both electroplating and electroless plating, with the addition of carbon nanotubes, resulted in significant improvements in various mechanical properties. The coated specimens showed improved tensile strength, elongation, Young's modulus, yield stress, toughness, and ultimate tensile stress. Hardness tests showed a 57% increase in the electroplated specimen and a 72% increase in the electroless plated specimen. Moreover, Young's modulus increased by 37.5% and 50% for electroplating and electroless plating, respectively, compared to the uncoated specimens. This study contributes to the field by investigating the effect of carbon nanotubes on both electroplating and electroless plating methods, specifically regarding the enhancement of mechanical properties in 2024 T3 aluminum alloy. The examination of two distinct coating processes and their effects on material performance through nanotube incorporation adds original insights to the existing knowledge.
{"title":"An Efficient Way to Produce a Nano Composite of Al 2024 T3 Reinforced by Multi-Walled Carbon Nano Tubes","authors":"Hayder Sami Alam, Fathi Adul-Sahib Alshmaa","doi":"10.15866/ireme.v17i6.23626","DOIUrl":"https://doi.org/10.15866/ireme.v17i6.23626","url":null,"abstract":"The main objective of this study is to evaluate the effect of incorporating Carbon Nanotubes (CNTs) into electroplating and electroless plating processes on the mechanical properties of aluminum alloy 2024 T3. The experimental approach involved adding pure Multi-Walled Carbon Nanotubes (MWCNTs) at a ratio of 2 g/L during the Ni-CNT coating process. Electroplating and electroless plating processes were applied to the specimens under specific conditions, including current, voltage, mixing speed, and temperature for both types of coating used. Both electroplating and electroless plating, with the addition of carbon nanotubes, resulted in significant improvements in various mechanical properties. The coated specimens showed improved tensile strength, elongation, Young's modulus, yield stress, toughness, and ultimate tensile stress. Hardness tests showed a 57% increase in the electroplated specimen and a 72% increase in the electroless plated specimen. Moreover, Young's modulus increased by 37.5% and 50% for electroplating and electroless plating, respectively, compared to the uncoated specimens. This study contributes to the field by investigating the effect of carbon nanotubes on both electroplating and electroless plating methods, specifically regarding the enhancement of mechanical properties in 2024 T3 aluminum alloy. The examination of two distinct coating processes and their effects on material performance through nanotube incorporation adds original insights to the existing knowledge.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136364280","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 : 2023-06-30DOI: 10.15866/ireme.v17i6.23631
Lely Adriana Luengas, Esperanza Camargo, Enrique Yamid Garzón G.
Alignment of transtibial prostheses is a key factor in the rehabilitation of individuals with below-knee amputation. Despite being performed by trained and experienced personnel, alignment often relies on observational methods, highlighting the need for technological tools that provide objective guidance in the placement of prosthesis components. A case study has been conducted, measuring the Center of Pressure (CoP) in five participants with transtibial amputation at three different locations within the socket: alignment, flexion, and extension. Variability in CoP velocity has been found in relation to socket location, and two computational models (decision trees and KNN K-Nearest Neighbors) have been generated to determine the correct socket placement. The computational models have demonstrated an accuracy of 0.677 for the decision tree and 0.787 for KNN, discriminating the socket positions based on CoP velocity. This provides valuable information to medical professional for evaluating alignment and supports the rehabilitation process. Overall, the text presents significant research on the alignment of transtibial prostheses and offers a potential solution to the need for technological tools to improve the accuracy and objectivity of the alignment process.
经胫骨假体的对齐是膝下截肢患者康复的关键因素。尽管是由训练有素和经验丰富的人员进行的，但校准通常依赖于观察方法，这突出了对技术工具的需求，这些工具可以在假体组件的放置方面提供客观指导。我们进行了一项病例研究，测量了5名经胫骨截肢患者在臼内三个不同位置的压力中心(CoP):对准、屈曲和伸展。发现CoP速度的可变性与套接字位置有关，并且已经生成了两个计算模型(决策树和KNN k -最近邻)来确定正确的套接字位置。计算模型表明决策树的准确率为0.677,KNN的准确率为0.787，基于CoP速度区分套接字位置。这为医疗专业人员评估对齐提供了宝贵的信息，并支持康复过程。总的来说，本文提出了对胫骨假体对齐的重要研究，并提供了一个潜在的解决方案，以提高对齐过程的准确性和客观性的技术工具的需求。
{"title":"The Center of Pressure Velocity as a Discriminant of Static Alignment in Transtibial Prostheses","authors":"Lely Adriana Luengas, Esperanza Camargo, Enrique Yamid Garzón G.","doi":"10.15866/ireme.v17i6.23631","DOIUrl":"https://doi.org/10.15866/ireme.v17i6.23631","url":null,"abstract":"Alignment of transtibial prostheses is a key factor in the rehabilitation of individuals with below-knee amputation. Despite being performed by trained and experienced personnel, alignment often relies on observational methods, highlighting the need for technological tools that provide objective guidance in the placement of prosthesis components. A case study has been conducted, measuring the Center of Pressure (CoP) in five participants with transtibial amputation at three different locations within the socket: alignment, flexion, and extension. Variability in CoP velocity has been found in relation to socket location, and two computational models (decision trees and KNN K-Nearest Neighbors) have been generated to determine the correct socket placement. The computational models have demonstrated an accuracy of 0.677 for the decision tree and 0.787 for KNN, discriminating the socket positions based on CoP velocity. This provides valuable information to medical professional for evaluating alignment and supports the rehabilitation process. Overall, the text presents significant research on the alignment of transtibial prostheses and offers a potential solution to the need for technological tools to improve the accuracy and objectivity of the alignment process.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136364285","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 : 2023-06-30DOI: 10.15866/ireme.v17i6.23071
Omar Quran, Hussein Maaitah, Sachin Borse, M. D. Shende, Abedalrzaq Alshqirate, Mohamad Y. Mustafa
The aim of CFD analysis is to study the flow characteristics due to the effect of offsetting in platoon of Sport Utility Vehicles (SUVs) by using OpenFOAM software. Platoons of three bodies of SUV in tandem are considered. The effect of spacing of SUV platoon on drag coefficient is assessed. The analysis of full scale SUV is performed at speed of 80 km/hr for vehicle spacing from 0.25 to 2 times length of SUV. Results show that an average drag coefficient of platoon is lower than that of standalone single SUV by 24% and consequently effect of platooning results in fuel saving. In addition, effects of offset of middle car in platoon by 10%, 20% and 30% are assessed on average drag coefficient. Offset of middle car in platoon results in an increase in average drag coefficient extended up to 6.61% as compared with inline platoon. Thus, in platooning, it will be better to maintain SUV straight-line to get full benefit of platooning.
{"title":"Study of the Flow Characteristics Due to the Effect of Offsetting in Platoon of Sport Utility Vehicles","authors":"Omar Quran, Hussein Maaitah, Sachin Borse, M. D. Shende, Abedalrzaq Alshqirate, Mohamad Y. Mustafa","doi":"10.15866/ireme.v17i6.23071","DOIUrl":"https://doi.org/10.15866/ireme.v17i6.23071","url":null,"abstract":"The aim of CFD analysis is to study the flow characteristics due to the effect of offsetting in platoon of Sport Utility Vehicles (SUVs) by using OpenFOAM software. Platoons of three bodies of SUV in tandem are considered. The effect of spacing of SUV platoon on drag coefficient is assessed. The analysis of full scale SUV is performed at speed of 80 km/hr for vehicle spacing from 0.25 to 2 times length of SUV. Results show that an average drag coefficient of platoon is lower than that of standalone single SUV by 24% and consequently effect of platooning results in fuel saving. In addition, effects of offset of middle car in platoon by 10%, 20% and 30% are assessed on average drag coefficient. Offset of middle car in platoon results in an increase in average drag coefficient extended up to 6.61% as compared with inline platoon. Thus, in platooning, it will be better to maintain SUV straight-line to get full benefit of platooning.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136364287","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 : 2023-06-30DOI: 10.15866/ireme.v17i6.23532
Arzul Arifin, Mohd Asri Yusuff, Nur Leena Wong Wai Sin, Kamarul Arifin Zakaria
In general, oyster culture in Malaysia relies on traditional methods. This study focused on the grow-out stage, particularly on the containers used to hold the oysters during this phase. The existing containers are in the form of modified plastic baskets, which are not fully covered for protection against predators, with only a single layer production. The newly-designed container consists of multilevel stacks, with a door that can be closed and locked. A mechanical simulation analysis was conducted to ensure the structure could hold the intended recommended maximum working loads of 25 kg. A series of different loads and water current speeds were applied to the structure of the new oyster container. Results of the analysis conducted showed the stress value increased when the loads increased, for all panels, the highest being 6.66 MPa, under a load of 50 kg and water current speed of 0.6 m/s. However, the all-stress values obtained for all panels were well below the yield strength of the polypropylene material used. Thus, the new oyster container structure was proven to be safe and sound under the different applied loads, making it reliable to operate.
{"title":"Effects of Different Loads Applied on a Newly-Designed Container for Oyster Grow-Out Culture Using Finite Element Analysis","authors":"Arzul Arifin, Mohd Asri Yusuff, Nur Leena Wong Wai Sin, Kamarul Arifin Zakaria","doi":"10.15866/ireme.v17i6.23532","DOIUrl":"https://doi.org/10.15866/ireme.v17i6.23532","url":null,"abstract":"In general, oyster culture in Malaysia relies on traditional methods. This study focused on the grow-out stage, particularly on the containers used to hold the oysters during this phase. The existing containers are in the form of modified plastic baskets, which are not fully covered for protection against predators, with only a single layer production. The newly-designed container consists of multilevel stacks, with a door that can be closed and locked. A mechanical simulation analysis was conducted to ensure the structure could hold the intended recommended maximum working loads of 25 kg. A series of different loads and water current speeds were applied to the structure of the new oyster container. Results of the analysis conducted showed the stress value increased when the loads increased, for all panels, the highest being 6.66 MPa, under a load of 50 kg and water current speed of 0.6 m/s. However, the all-stress values obtained for all panels were well below the yield strength of the polypropylene material used. Thus, the new oyster container structure was proven to be safe and sound under the different applied loads, making it reliable to operate.","PeriodicalId":39251,"journal":{"name":"International Review of Mechanical Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136364284","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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