IIUM Engineering Journal最新文献

{"title":"COMPARISON OF THE MECHANICAL PERFORMANCE OF DENSE GRADING AND POROUS GRADING MIXTURE UTILIZED WITH CRUMB RUBBER MODIFIED BINDER","authors":"Noor Yusriah Esa, Wan Nur Aifa, Norhidayu Kasim, Nur Khairiyah Basri","doi":"10.31436/iiumej.v25i1.2969","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2969","url":null,"abstract":"Pavement and road networks play a very huge role in everyone’s daily lives to connect from one point to another point. With globalization, growth in the economy, and development, the number of vehicles traveling each day on the road increases rapidly over the years. Thus, the constant application of heavy loads together with Malaysia’s climatic factors lead the pavement to be susceptible to deterioration such as potholes and cracking. The service life and resistance of the pavement to deterioration can be improved with the incorporation of crumb rubber modified binder (CRMB) for asphaltic pavement. Hence, the objective of this research is to do a comparative evaluation of the mechanical performance of the CRMB that is utilized in dense grading and porous grading mixtures with varying percentage of crumb rubber replacement. The experimental portion of the research was done by substituting the crumb rubber at the replacement percentages of 12%, 14%, 16% and 18% (from the weight of asphalt binder) in preparing the modified binder that was further evaluated by conducting physical testing (penetration and softening point test). Then, the mechanical evaluation of dense and porous grading asphalt mixtures incorporating the crumb rubber was performed with Marshall stability and flow prior to comparing the strength performance for both asphalt mixtures. Based on the result obtained, it was found that the highest percentage of crumb rubber replacement, which is 18%, would give the highest level of stiffness and softening point on the binder. Furthermore, from the Marshall test, it was established that 16% of crumb rubber replacement on asphaltic binder is the most optimum for a porous mixture, given that the CRMB is 5% of the total mix. Nonetheless, at the same 16% of crumb rubber replacement, the value for Marshall test on the dense mixture shows an adverse result when compared to the control. Hence, it was concluded that the mechanical performance of CRMB utilized with porous mixtures shows more impressive results compared CRMB utilized with dense mixtures. ABSTRAK: Turapan dan rangkaian jalan raya memainkan peranan besar dalam kehidupan harian setiap orang dalam berhubung dari tempat ke tempat lain. Melalui globalisasi dan pertumbuhan ekonomi dan pembangunan, bilangan kenderaan bergerak setiap hari di atas jalan raya telah meningkat mendadak beberapa tahun kebelakangan ini. Oleh itu, beban berat berterusan bersama-sama faktor iklim Malaysia menyebabkan turapan jalan terdedah kepada kerosakan seperti jalan berlubang dan keretakan. Jangka hayat perkhidmatan dan rintangan turapan terhadap kerosakan jalan boleh diperbaiki melalui turapan asfaltik yang diubah suai dengan pengikat serbuk getah (CRMB). Justeru, kajian ini bertujuan bagi membanding prestasi mekanikal CRMB yang digunakan dalam campuran penggredan padat dan campuran berliang dengan peratusan penggantian serbuk getah berbeza. Kajian dijalankan dengan menggantikan serbuk getah pada peratusan pengga","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"52 4","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139127312","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":"CHARACTERISATION OF POMACEA CANALICULATA EGGS TREATED WITH PROTEASE","authors":"N. H. Mohd Salleh, N. Zainalabidin, Siti Noor Hajjar Md Latip","doi":"10.31436/iiumej.v25i1.2732","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2732","url":null,"abstract":"Pomacea canaliculata is a type of freshwater snail that has become a major pest in paddy fields, as it feeds on young paddy leaves and stems, thus, posing a serious threat to paddy production. It was named one of the world's top 100 worst invasive species, with serious consequences for the environment, human health, and the social economy. Their hatchability rate is high, which explains their global distribution worldwide. Therefore, it is vital to manage their hatchability to prevent their population from expanding further by understanding the protection that permits the eggs to survive. P. canaliculata eggs are covered with a thin layer of cuticle that is rich in protein to protect the embryo during the hatching process. The biological treatment with protease enzyme successfully hydrolysed the protein cuticle layer, lowering the percentage of hatchability. Disruption of the protein cuticle may have an impact on conductivity, water loss, hatching time, protein content, and other factors. However, documentation of the protease effect on the protein cuticle is scarce. Therefore, the goal of this study is to evaluate the protease treatment on the protein cuticle of P. canaliculata eggs physically (conductivity, water loss, and morphological analysis) and chemically (cuticle protein content, protein breakdown, and amino acid profile). Physical characterisation revealed that protease-treated eggs have higher conductivity and water loss than the control egg. Images taken with a light microscope (LM) and a scanning electron microscope (SEM) revealed changes in cuticle structure, which explained the protease-induced cuticle hydrolysis. Chemical characterisation revealed a decrease in cuticle protein content, hydrolysis of protein to a small size, and changes in amino acid composition. The physical and chemical analyses strongly suggested that protease can damage the cuticle protein, thus, preventing the eggs from hatching. ABSTRAK: Pomacea canaliculata adalah sejenis siput air tawar yang telah menjadi perosak utama di sawah padi, kerana ia memakan daun dan batang padi yang muda, sekaligus menimbulkan ancaman serius kepada pengeluaran padi. Ia disenaraikan antara 100 spesis invasif utama dunia dengan kesan serius pada alam sekitar, kesihatan manusia dan sosio-ekonomi. Kadar penetasannya adalah tinggi, meningkatkan penyebaran mereka secara global di seluruh dunia. Oleh itu, adalah sangat penting untuk mengawal populasi ini daripada terus berkembang dengan memahami perlindungan yang membenarkan telur untuk hidup. Telur P.canaliculata dilapisi dengan lapisan kutikel nipis yang kaya dengan protein bagi memberi perlindungan untuk embrio semasa proses penetasan. Rawatan biologi dengan enzim protease telah berjaya menghidrolisis lapisan kutikel protein, sekaligus mengurangkan peratusan penetasan. Gangguan terhadap lapisan kutikel protein mungkin memberi kesan pada konduktiviti, kehilangan air, tempoh penetasan, kandungan protein dan faktor lain. Walau bagaimana","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"34 7","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139129496","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":"OPTIMAL CLUSTERING OF WIRELESS MULTIPATHS BY UNIFORM MANIFOLD APPROXIMATION AND PROJECTION-ASSISTED DBSCAN","authors":"Emmanuel T. Trinidad, Lawrence Y. Materum","doi":"10.31436/iiumej.v25i1.2716","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2716","url":null,"abstract":"Uniform Manifold Approximation and Projection (UMAP) is applied to reduce the multipath dataset into 2-dimensions (2D) for visualization and clustering.  Density-based spatial clustering of applications with noise (DBSCAN) is used as the clustering approach and the performance of different search radius epsilon ?. The proposed approach was used to cluster semi-urban scenarios of the COST2100 channel model (C2CM), which has many multipath components (MPCs).  The approach is validated by comparing the clustering results to the ground truth and computing the Adjusted Rand Index (ARI) and the cluster-wise Jaccard index . The results suggest that lowering the search radius up to 0.3 achieved a median below 0.6 in the multiple-links scenarios due to the overlapping nature of clusters. Nevertheless, the median values above 0.7 and 0.8 for the ARI and Jaccard index , respectively for the single-link scenarios indicate the robsutness of the approach. ABSTRAK: Anggaran Manifold Seragam dan Unjuran (UMAP) 2-dimensi (2D) digunakan sebagai penggambaran dan pengelasan bagi mengurangkan set data pelbagai laluan. Aplikasi  pengelasan ruangan bersama bunyi berdasarkan ketumpatan  (DBSCAN) ini mengguna pakai  pendekatan pengelasan dan prestasi pelbagai radius carian epsilon ?. Pendekatan yang dicadangkan ini digunakan bagi pengelasan senario separa-bandar model saluran COST2100 (C2CM), di mana komponen ini mempunyai banyak laluan (MPCs). Pendekatan ini disahkan dengan membandingkan dapatan pengelasan kepada kesahihan lapangan, pengiraan Indeks Rawak Terlaras (ARI) dan indeks Jaccard pengelasan ?. Dapatan menunjukkan pengurangan radius carian sehingga 0.3 dicapai pada median di bawah 0.6 dalam senario pelbagai pautan disebabkan oleh sifat pertindihan pengelasan. Walau bagaimanapun, nilai median di atas 0.7 dan 0.8 untuk ARI dan indeks Jaccard ?, masing-masing menunjukkan kaedah ini berkesan bagi senario pautan-tunggal.","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"71 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139128918","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":"GROWTH REVIVAL OF GREY OYSTER (PLEUROTUS PULMONARIUS) POWDER CULTURE MUSHROOM FROM THE EFFECT OF SPRAY DRYING TEMPERATURE","authors":"Zarina Zakaria, Fatihah Aziz, Mohd Sharizan Md Sarip, N. H. Mohd Salleh","doi":"10.31436/iiumej.v25i1.2748","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2748","url":null,"abstract":"In mushroom cultivation, spawn is among the most important factors that ensure a successful production. Considering several drawbacks from both solid and liquid spawn in shelf life and preservation matters, it is suggested that the dry powder form of spawn is a good potential to explore. A study of powder culture formation using a spray dryer involved various inlet temperatures of 80 oC, 90 oC, 100 oC, 110 oC, 120 oC and 130 oC. The yield % of the dried powder culture was measured and it was found that 130 oC yielded the highest percentage of 50.33%. The lowest temperature yielded the lowest percentage. On the other hand, the lowest temperature of 80 oC revived the highest mycelium dry weight at 1.68 g which was obtained on the 10th day of the incubation periods. The revival ability was decreased with the increase of temperature. The study proved that the powder culture of P. pulmonarius was able to perform and revive whereby it holds a potential to be preserved over a longer period, which is beneficial for the mushroom cultivator. ABSTRAK: Dalam penanaman cendawan, benih yang baik adalah antara faktor penting yang memastikan penghasilan tinggi. Terdapat beberapa kelemahan daripada benih pepejal dan cecair dalam memastikan jangka hayat berpanjangan serta memastikan benih dalam keadaan berkualiti sepanjang masa. Oleh itu, penghasilan benih cendawan dalam bentuk serbuk kering sangat berpotensi untuk diterokai. Kajian mengenai penghasilan kultur serbuk menggunakan semburan kering telah melibatkan pelbagai suhu salur masuk seperti 80 oC, 90 oC, 100 oC, 110 oC, 120 oC dan 130 oC. Peratus penghasilan kultur serbuk kering telah diukur dan didapati pada suhu 130 oC menghasilkan peratusan tertinggi iaitu sebanyak 50.33%, manakala suhu terendah menghasilkan peratusan terendah. Sebaliknya, suhu terendah pada 80 oC menumbuhkan semula berat kering miselium dengan bacaan tertinggi iaitu sebanyak 1.68 g diperoleh pada hari ke-10 tempoh inkubasi. Keupayaan menumbuh berkurangan dengan peningkatan suhu. Kajian membuktikan bahawa kultur serbuk P. pulmonarius mampu berfungsi dan tumbuh semula di mana ianya berpotensi disimpan dalam tempoh lama, ini berfaedah kepada penanaman cendawan.","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"24 26","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139129445","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":"STRATEGIES TO REDUCE THE NUMBER OF SEVERELY INJURED VICTIMS IN ADOLESCENT MOTORCYCLE RIDERS","authors":"Pada Lumba, Anton Ariyanto, Ahmad Fathoni","doi":"10.31436/iiumej.v25i1.2997","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2997","url":null,"abstract":"Statistical data in 2021 in Indonesia shows that the number of accident victims reached 103,645 cases. Around 25% of these accident victims were underage drivers. For this reason, efforts must be made to minimize the number of accident victims, especially avoiding severe injuries. The criteria for respondents are motorcycle riders aged 12 - 25 years who are still categorized as adolescent riders. The data collection was carried out by interviewing respondents for approximately 10 minutes. For data analysis, the number of respondents used was 308 respondents. The location for data collection was Riau Province, Indonesia. The data was analyzed by Bayesian network. To get a good model, the basic model was validated. The number of respondents used to validate this model was 107 respondents. The results of the analysis show that the probability of an adolescent driver to experience severe injury is 27% and mild injury is 73%.Scenario 1 shows that poor driving performance will increase the probability of severe injury by 3%.Scenario 2 shows that driver fatigue will increase the probability of severe injury by 3%.Scenario 3 shows that drivers who conduct traffic violations will increase the probability of severe injury by 5%.Scenario 4 shows that drivers who perform long trips(more than 1 hour) increase their fatigue from 28% to 60%, which also increases the probability of severe injury by 1%.Scenario 5 shows that late night driving (between 24:00 – 06:00) not only increases the probability of fatigue but also increases the probability of severe injury by 1%.Strategic steps to reduce severe injury among adolescent motorcyclists include driving with good performance, avoiding fatigue-inducing conditions, abiding by all traffic rules, and avoiding driving between the hours of 24:00-06:00. ABSTRAK: Data statistik pada tahun 2021 di Indonesia menunjukkan jumlah mangsa kemalangan mencapai 103,645 kes. Kira-kira 25% mangsa kemalangan ini adalah pemandu bawah umur. Oleh itu, usaha perlu dilaksanakan bagi meminimumkan mangsa kemalangan, terutama dalam mengelakkan kecederaan parah. Kriteria responden adalah penunggang motosikal berumur 12 - 25 tahun yang masih dikategori sebagai penunggang remaja. Pengumpulan data dijalankan dengan menemu bual responden selama lebih kurang 10 minit. Analisis data ini melibatkan 308 orang responden. Lokasi pengumpulan data adalah di Riau, Indonesia. Data dianalisis dengan rangkaian Bayesian. Bagi mendapatkan model terbaik, model asas telah disahkan. Bilangan responden yang terlibat dalam mengesahkan model ini adalah seramai 107 orang responden. Dapatan kajian menunjukkan kebarangkalian pemandu remaja yang mengalami kecederaan parah adalah 27% dan cedera ringan sebanyak 73%. Senario 1 menunjukkan pemanduan tidak berhemah akan meningkatkan kebarangkalian cedera parah sebanyak 3%. Senario 2 menunjukkan bahawa memandu dalam keadaan letih akan meningkatkan kebarangkalian cedera parah sebanyak 3%. Senario 3 menunjukkan bahawa pemandu y","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"9 7","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139127762","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":"ADVANCING SYSTEM INTEGRATION: VERILOG-BASED HARDWARE IMPLEMENTATION OF AN ASIC INTERFACE FOR THREE AMBA PROCESSORS","authors":"S. Motakabber, M. I. R. Rokon, Ahm Zahirul Alam, Gazi Zahirul Islam, M. A. Matin, Md. Mahmud","doi":"10.31436/iiumej.v25i1.2914","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2914","url":null,"abstract":"This paper presents the development of a multi-AMBA system processor interface employing multiple AMBA processors. The primary goal of this interface is to establish connections between various AMBA AHB interfaces and external memory units such as RAM and REGISTER, leveraging the high-performance capabilities of AMBA AHB. The research delves into the utilization of ASICs to integrate processors and functional blocks into a System-On-Chip (SoC) configuration, enabling the execution of intricate applications. Within the ASIC environment, the research explores how processors communicate with their designated targets through an interface that standardizes the communication protocol for all targets. It underscores the challenges posed by data throughput and inter-processor/RTL communication in contemporary processors and suggests the concurrent use of multiple AMBA processors for accessing their respective targets. Additionally, the paper introduces an arbitration system for managing multiprocessor access and investigates the optimization of bulk data access while prioritizing crucial ASIC design constraints, including speed, low power consumption, and efficient area utilization. The proposed system was rigorously validated through simulation using Verilog HDL, yielding positive and promising results. ABSTRAK:  Kajian ini adalah mengenai pembangunan antara muka, sistem pemproses berbilang AMBA yang mengandungi berbilang pemproses AMBA. Tujuan antara muka ini adalah bagi mewujudkan hubungan pelbagai antara muka AMBA AHB dengan unit memori luaran seperti RAM dan REGISTER, ini sekaligus memanfaatkan keupayaan tinggi AMBA AHB. Kajian ini mengguna pakai ASIC bagi menyatukan pemproses dan blok berfungsi pada konfigurasi Sistem-Atas-Cip (SoC), membolehkan pelaksanaan aplikasi rumit. Pada persekitaran ASIC, kajian ini meneroka cara pemproses berkomunikasi dengan sasaran yang ditetapkan melalui perantaraan antara muka yang menyeragam protokol komunikasi bagi semua sasaran. Ia menggariskan cabaran yang ditimbulkan oleh pemprosesan data dan komunikasi antara pemproses/RTL dalam pemproses kontemporari dan mencadang penggunaan secara serentak pemproses berbilang  AMBA bagi mengakses sasaran masing-masing. Selain itu, kertas kerja ini memperkenalkan sistem timbang tara bagi mengurus akses berbilang pemproses dan mengkaji akses data pukal yang optimum sambil mengutamakan kekangan reka bentuk ASIC, seperti kelajuan, penggunaan kuasa rendah dan penggunaan kawasan secara cekap. Sistem ini telah disahkan dengan teliti melalui simulasi menggunakan Verilog HDL, memberikan dapatan positif dan harapan baik.","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"52 6","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139127804","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":"EXTENDABLE HIGH-GAIN DC-DC CONVERTER FOR STORAGE BATTERY AND PHOTOVOLTAIC CELL","authors":"S. Motakabber, Khadiza Akter, Ahm Zahirul Alam, Siti Hajar Binti Yusoff","doi":"10.31436/iiumej.v25i1.3093","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.3093","url":null,"abstract":"DC-DC converters with significant gain, ripple-free input current, and shared ground are required to elevate the output voltages of batteries, fuel cells, and Photovoltaic sources. The proposed topology utilizes a solitary switch to control the circuit and it has additional inculpation of a voltage doubler cell at the load side, a switch capacitor cell in the middle, and a quadratic cell at the output side. These cascaded configurations lead to significant voltage gains at moderate duty cycle rates. Additionally, the voltage stress over the power components is negligible, coming in under one-third of the resultant voltage. Moreover, the number of cells at the input and output side can be extended to obtain high voltage according to the requirements of the load. The gain in voltage, efficiency, and normalized voltage stress of the semiconductor elements in the circuit are examined concerning other solutions found in the literature. Eventually, photovoltaic and battery sources were included to analyze the proposed topology to confirm the circuit’s multifaceted functionality. The circuit was developed for 270 W, 440 V output from 36 V input, and a 40 kHz switching pulse was used to drive the switch. The theoretical and simulation analysis states that incorporating photovoltaic and other sources did not deteriorate the transformation efficiency. Simulink and PSIM analysis found that the circuit successfully transferred  power from source to load. ABSTRAK: Penukar DC-DC yang mempunyai gandaan ketara, input arus bebas riak dan pembumi berkongsi penting bagi meningkatkan voltan keluar bateri, sel bahan api dan sumber fotovolta. Topologi yang dicadangkan ini menggunakan suis tersendiri bagi mengawal litar dan ia mengandungi sel pendua voltan tambahan bagi menghentikan arus di bahagian beban, sel suis kapasitor di tengah dan sel kuadratik di bahagian voltan keluar. Konfigurasi berturutan ini membawa kepada gandaan voltan ketara pada kadar kitar tugas sederhana. Tambahan, tekanan voltan ke atas komponen kuasa boleh diabaikan, iaitu satu pertiga daripada voltan terhasil. Selain itu, bilangan sel di bahagian kemasukan dan keluaran arus boleh dilanjutkan bagi mendapatkan voltan tinggi mengikut keperluan beban. Gandaan voltan, kecekapan dan tekanan voltan ternormal pada bahan dalam litar semikonduktor diperiksa dengan menyamai penyelesaian lain yang ditemui dalam kajian terdahulu. Akhirnya, sumber fotovolta dan bateri dimasukkan bagi menganalisis topologi yang dicadangkan bagi mengesahkan fungsi pelbagai rupa litar. Litar yang dibangunkan ini digunakan pada kuasa 270 W, pada aras voltan 440 V dengan kemasukan voltan 36 V dan suis operasi berfrekuensi 40 kHz. Analisis teori dan simulasi menyatakan bahawa gabungan fotovolta dan sumber lain tidak mengurangkan kecekapan transformasi. Analisis Simulink dan PSIM mendapati litar ini berjaya memindahkan 95% kuasa dari sumber kepada beban.","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"39 9","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139126561","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":"MOBILE GAS SENSING FOR LABORATORY INFRASTRUCTURE","authors":"Raduan Sarif, Mohammed Faeik Ruzaij Al-Okby, T. Roddelkopf, Kerstin Thurow","doi":"10.31436/iiumej.v25i1.2727","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2727","url":null,"abstract":"Indoor air quality has become a growing concern in modern society due to prolonged indoor working hours that lead to the frequent exposure to numerous toxic gases from various sources. These pollutants, including volatile organic compounds (VOCs), pose severe health risks such as asthma and lung cancer. To address this critical issue, this project focuses on developing and evaluating an advanced gas detection system that explicitly targets VOCs by integrating two novel metal oxide semiconductor (MOX)-based gas sensors, ENS 160 and TED110. Different sensor parameters, such as the air quality index (AQI) and volatile organic compounds (VOCs), were evaluated using 12 volatile organic chemicals. The findings revealed that the ENS 160 sensor performs excellently, detecting 60 gas samples out of 72, with an average detection rate of approximately 83%. In contrast, the TED110 sensor demonstrated considerably lower performance and response in 24 out of 72 gas samples, with a detection rate of about 33%. The results contribute insights into the gas sensor's characteristics, providing essential information to enhance indoor air quality monitoring technology, particularly in laboratory environments. ABSTRAK: Setiap hari, banyak gas toksik, letupan dan beracun berlaku di dalam dan di luar rumah daripada pelbagai sumber. Dalam masyarakat moden, kebanyakan orang menghabiskan 90% masa bekerja mereka di dalam rumah; oleh itu, kualiti udara dalaman secara beransur-ansur bertambah buruk daripada suasana luar. Projek ini sedang membangunkan sistem pengesanan dan pemantauan moden yang canggih untuk mengesan pelbagai gas berbahaya, seperti sebatian organik meruap (VOC). Dua penderia gas berasaskan semikonduktor oksida logam (MOX) novel telah diperkenalkan dalam projek ini dengan mikropengawal yang dikemas kini untuk pemerolehan data dan pemprosesan data. Tambahan pula, parameter sensor yang berbeza (AQI, TVOC) telah dinilai dengan 12 bahan kimia organik yang tidak menentu. Semua ujian telah dijalankan dalam tudung kimia tradisional dengan tiga kuantiti sampel yang berbeza (5?L, 10?L, 50?L) pada jarak 40 cm dan 100 cm. Akhir sekali, volum minimum yang boleh dikesan berdasarkan jarak antara nod sensor dan sumber bocor telah dianalisis selepas eksperimen yang meluas dengan kedua-dua sensor. Sensor ENS 160 sedang mengesan 60 sampel gas daripada 72, dalam ketiga-tiga parameter seperti AQI, TVOC dan kadar pengesanan CO2 sekitar 83%. TED110 menunjukkan prestasi yang sangat rendah; ia telah bertindak balas kepada 24 daripada 72 sampel gas, dan kadar pengesanan ialah 33%.","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"19 3","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139125966","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":"THIOL FUNCTIONALIZED GOLD NANOBIPYRAMIDS-BASED PLASMONIC SENSOR FOR GLUCOSE DETECTION","authors":"M. Morsin, Natasya Salsabiila, Muhammad Hanif Hasbullah, S. Nafisah, N. L. Razali, Iwantono","doi":"10.31436/iiumej.v25i1.2811","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2811","url":null,"abstract":"Gold nanobipyramids (GNBPs) have high selectivity in detecting changes in their surrounding medium because of their electric field enhancements and larger surface areas. In this study, we functionalized GNBPs using a thiol group that acts as a ligand to improve the detection performance of the analytes. The investigation is carried out by varying the functionalization periods from 12 to 72 hours. The optimum thiol-functionalized GNBPs (t-GNBPs) are obtained in 60 hours, with a length of 36.84 ± 2.05 nm, a width of 24.02 ± 0.74 nm, and an aspect ratio of 1.54 ± 0.11. Then, the optimum t-GNBPs are used as a sensing material in a plasmonic sensor to detect glucose. The limit of detection (LoD) of glucose is 1 µM for this sensor. The plasmonic sensor has been successfully built with reliable performance in detecting glucose with excellent linearity, sensitivity and R2 = 1; good selectivity compared to four similar chemical structure analytes; high stability with a low error value, i.e., ± 0.02 a.u.; and almost consistent repeatability values in each cycle with low percent variance of 0.000025% for the t-SPR area and 0.000032% for the l-SPR area. Therefore, a plasmonic sensor based on t-GNBPs is an alternative method of detecting glucose with high sensitivity, selectivity and repeatability. ABSTRAK: Nanobipiramid Emas (GNBPs) memiliki selektiviti yang tinggi dalam mengesan perubahan medium sekitar kerana memiliki peningkatan medan elektrik dan luas permukaan yang besar. Kajian ini merupakan fungsionalisasi terhadap GNBPs dengan menggunakan kumpulan thiol sebagai ligan bagi meningkatkan prestasi pengesanan analit. Kajian ini  dilakukan dengan mempelbagaikan tempoh masa fungsionalisasi dalam julat waktu 12 hingga 72 jam. GNBPs optimum yang difungsionalisasi oleh thiol (t-GNBPs) diperoleh pada 60 jam, dengan panjang 36.84 ± 2.05 nm, lebar 24.02 ± 0.74 nm, dan nisbah aspek 1.54 ± 0.11. Kemudian, t-GNBPs optimum digunakan sebagai bahan penderia pada sensor plasmonik bagi mengesan glukosa. Limit pengesanan glukosa (LoD) bagi sensor ini adalah sebanyak 100 µM. Sensor plasmonik telah berhasil dibangunkan dengan kecekapan boleh percaya dalam mengesan glukosa dengan lineariti dan sensitiviti sebanyak R2 = 1. Pemilihan yang baik dibandingkan dengan 4 analit yang sama dari segi struktur kimia. Kestabilan yang tinggi dengan nilai ralat rendah iaitu ± 0.02 a.u, dan memiliki nilai keberulangan yang hampir konsisten pada setiap kitar dengan peratusan varian rendah iaitu sebanyak 0.000025% bagi bahagian t-SPR dan 0.000032% bagi l-SPR. Oleh itu, pengesan plasmonik berdasarkan t-GNBPs ini adalah kaedah alternatif bagi mengesan glukosa dengan sensitiviti, selektiviti, dan kebolehulangan yang tinggi.","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"6 9","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139126736","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 INDUSTRIAL AND WASTE FIBERS ON CONCRETE STRENGTH AND STRUCTURAL BEHAVIOR OF RC SHORT COLUMNS","authors":"Maryam Naser, M. Falah, Fatimah Naser, M. Nasr, T. Hashim, A. Shubbar","doi":"10.31436/iiumej.v25i1.2847","DOIUrl":"https://doi.org/10.31436/iiumej.v25i1.2847","url":null,"abstract":"Concrete is a brittle substance; thus, it is reinforced with rebars and fibers to enhance its ductility. On the other hand, the presence of waste from various industries negatively impacts the environment. The ongoing reconstruction in Iraq has resulted in an abundance of locally produced rebar-connecting wire (RCW) and copper electric wire (CEW) waste. To minimize the environmental impact of these wastes, they can be reused in other industries, such as the concrete industry. Few studies have dealt with concrete's structural and mechanical properties containing these local residues. Therefore, this study included an experimental investigation of concrete columns with and without various types of industrial and waste fibers. Two types of industrial fibers (macro hooked-end; CH, and micro straight; CS) steel fibers and two types of waste fibers (RCW and CEW) were utilized. Six reinforced concrete (RC) columns (150 × 150 × 450 mm3) were cast: one control column without fibers and five columns with fibers. The fiber content within the columns was fixed at 0.75% of the concrete volume. The cracks pattern, load-deflection behavior and concrete strain for RC columns were investigated. Moreover, the mechanical properties in terms of compressive, splitting tensile, and flexural strengths tests were also conducted. The results revealed that all types of fibers used improved the mechanical and structural properties of the concrete. Moreover, although the hybrid synthetic fibers gave the best improvement compared to the reference sample, the waste fibers (especially RCW) showed a significant improvement that reached 30.91% in relation to the ultimate load and (10.1, 10.8 and 14.4%) in relation to the compressive, tensile, and flexural strengths respectively. ABSTRAK:  Konkrit adalah material rapuh; oleh itu ianya dikuatkan dengan besi dan fiber bagi menguatkan kekuatannya. Dalam masa sama, kehadiran bahan buangan dalam pelbagai industri memberi kesan negatif kepada persekitaran. Penstrukturan semula Iraq yang sedang berlangsung memberi kesan kepada kebanjiran bahan buangan seperti besi penghubung litar (RCW) dan litar elektrik tembaga (CEW) buatan tempatan. Bagi mengurangkan kesan pencemaran terhadap alam sekitar, bahan-bahan ini boleh diguna balik dalam industri berbeza, seperti industri konkrit. Terdapat banyak kajian terhadap buangan tempatan yang melibatkan struktur bahan konkrit dan sifat mekanikal.  Oleh itu, kajian ini merupakan kajian eksperimen pasak konkrit dengan atau tanpa pelbagai jenis industri dan fiber buangan. Dua jenis fiber industri iaitu fiber besi (mikro hujung-penyangkut; CH dan mikro lurus; CS) dan dua jenis fiber buangan (RCW dan CEW) dipakai. Enam RC pasak konkrit (150 × 150 × 450 mm3) dihasilkan: satu pasak kawalan tanpa fiber dan lima pasak dengan fiber. Kandungan fiber dalam pasak di tetapkan pada 0.75% isipadu konkrit. Corak rekahan, ciri-ciri kesan beban dan tekanan konkrit pada pasak RC dikaji. Tambahan, kajian terhadap ciri-ci","PeriodicalId":13439,"journal":{"name":"IIUM Engineering Journal","volume":"12 11","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139129133","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}