Malaysian Journal of Fundamental and Applied Sciences最新文献

{"title":"Research Trends on Functional Data Analysis Using Scopus Database: A Bibliometric Analysis","authors":"J. Suhaila, Muhammad Fauzee Hamdan","doi":"10.11113/mjfas.v19n4.2863","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2863","url":null,"abstract":"Functional data analysis (FDA) has received significant attention from researchers due to its flexibility and diverse applications in various fields. FDA provides a comprehensive framework for analysing and extracting information from complex and high-dimensional datasets, enabling researchers to obtain insights into the underlying processes, improve modelling, and make accurate predictions. Therefore, understanding the FDA topic and its features and tools, as well as identifying the collaborative networks, are crucial for the development of its research areas. The objective of the present bibliometric study is to analyse the global research trend in FDA areas based on publication outputs, authorships, co-authorships, affiliated countries, and the co-occurrence of author keywords, which will enable researchers to assess the existing knowledge environment, future trends, potential research gaps, and collaboration opportunities. The publications from the year 1989 to 2021 were retrieved from the Scopus database, resulting in 1712 articles in journals after screening. Results have shown that articles published in the Journal of the American Statistical Association received the highest citations. Nearly 43% of the published articles were contributed by the leading authors from the USA, followed by China (11.5%) and Spain (9.4%). According to the QS World University Ranking 2021, eight of the top 20 productive institutions were ranked among the top 100 best universities. The findings indicated that researchers had intensively developed and applied FDA tools and features, such as smoothing, principal component analysis, regression, and clustering, in various domains. In addition, the expansion of FDA tools could be seen based on the recent progress in author keywords. New keywords, including function-on-function regression, function-on-scalar regression, scalar-on-function regression, outlier detection, structural health monitoring, and COVID-19, have arisen recently. Due to public concern about emerging diseases, future FDA work is expected to rise, particularly in the health sciences and biomedical fields.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"70 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76540527","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":"Robust Regression Analysis of Full Overlapping Caffeine and Pyridoxine HCl UV-Vis Spectra in Pharmaceutical Tablet","authors":"S. Suprapto, Y. Ni'mah, Rifda Alifah Hisana","doi":"10.11113/mjfas.v19n4.2918","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2918","url":null,"abstract":"The determination of caffeine and pyridoxine HCl in medicinal tablets has been successfully carried out. The mixture of caffeine and pyridoxine solution produces UV-Vis with full overlapping spectra. The full overlapping spectra can not be analyzed using conventional multicomponent analysis, as they do not have a distinct maximum wavelength. This research proposed a full overlapping spectra analysis using Robust regression. The regression models used in this research were based on Huber, RANSAC, and Theil-Sen Regression. Robust regression is a regression method that was not sensitive to the presence of outliers from the input or output data. Robust Regression models were trained using 25 standard solutions of caffeine and pyridoxine HCl at varied ratios. The models were validated using test solutions with known concentration ratios. The validated models were applied to determine the concentration of medicinal tablets. From this study, the recovery values of medicinal tablets obtained using Huber, RANSAC, and Theil-Sen Regression methods for caffeine were 96.94%, 97.19%, and 96.16% respectively, while the recoveries of pyridoxine HCl were 122.65%, 104.89%, and 107.48%.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"24 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81795934","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 IAA Phytohormone (Indole-3-Acetic Acid) on the Growth, Lipid, Protein, Carbohydrate, and Pigment Content in Euglena sp.","authors":"Wildan Hilmi Azharul Hakim, T. Erfi̇anti̇, A. N. Dhiaurahman, Khusnul Qonita Maghfiroh, Ria Amelia, Istini Nurafifah, D. Kurnianto, D. Siswanti, E. Suyono, Septhian Marno, Irika Devi","doi":"10.11113/mjfas.v19n4.2884","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2884","url":null,"abstract":"Nowadays, energy consumption is massively increasing in the world. The production of biofuels from microalgae has received considerable attention recently and has the potential to supplant fossil fuels. Recent research focuses on developing the potential of microalgae as an alternative fuel. This research will focus on evaluating the effect of indole-3-acetic acid (IAA) on the growth and metabolite production of Euglena sp. The methods used in this study started with a medium preparation and cultivation using IAA treatment, where the treatment used controlled IAA 5 g/L, IAA 10 g/L, and IAA 15 g/L with three biological repetitions. Optical density (OD) was measured using a spectrophotometer (OD680), biomass was measured using the gravimetry method, lipid was calculated using Bligh and Dyer (1995), the protein was measured using Bradford solution, carbohydrates were measured using phenol sulfuric acid, and pigments were extracted using methanol and measured using a spectrophotometer. According to the findings of this study, IAA 5 g/L can enhance the growth rate. For biomass, the best result was at 10 g/L of IAA (2.216 g/L ± 0.284). Meanwhile, carbohydrates, proteins, and lipids were higher in IAA 15 g/L. Chlorophyll a, b, and total carotenoid were higher in 5 g/L of IAA. The results obtained in this study showed that the IAA hormone increased the growth and metabolite content of Euglena sp.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"10 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77322491","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":"Electrogenerative Process as an Alternate Technique for Nickel Recovery from Its Sulphate Solution at Low Concentration","authors":"Syed Fariq Fathullah Syed Yaacob, Siti Hawa Hang Kadim, Megat Ahmad Kamal Megat Hanafiah, F. B. Mohd Suah","doi":"10.11113/mjfas.v19n4.2778","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2778","url":null,"abstract":"In this study, a static batch reactor equipped with three-dimensional (3-D) carbon felt (CF) as cathode material was fully optimized to recover a low nickel concentration from its sulphate solution. Nickel recovery was performed using several nickel concentrations ranging from 50, 100, 250, 400 and 500 mg/L. Moreover, within 30 min of electrogenerative operation, it was discovered that the recovery of nickel achieved > 90 % in acidic conditions. At last, the deposition of nickel into CF was further investigated by scanning electron microscopy (SEM) to visualize the surface morphology of nickel on CF.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"27 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79993066","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 Mixture of Limes in Acid Mine Drainage Treatment","authors":"A. Othman, C. R. Mamat, I. Ibrahim, Mohd Syahrir Mohd Rozi","doi":"10.11113/mjfas.v19n4.2759","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2759","url":null,"abstract":"In this study the mixture of limes was used to treat acid mine drainage (AMD) or acid rock drainage (ARD). The results showed that AMD can be treated by a mixture of limes (CHL). CHL was a mixture of carbide and hydrated limes. Arsenic (As) was decreased after reaction with CHL. 0.5 g of CHL with an interval time of 20 mins was chosen as the best parameter for treating AMD. pH value was increased from 3.29 to 6.69 and as concentration was decreased from 3.273 mg/L to 0.002 mg/L. Both of the results obtained after the reaction complied with Standards A and B of the Environmental Act 1974.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"46 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90645523","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":"Bacillus cereus Contamination in Selected Home-based Food Products Sold Throughout Malaysia","authors":"Muhammad Amirun Che Hassan, M.N.S. Jamzuri, Fisal Ahmad, A. Zamri, Tuan Zainazor Tuan Chilek","doi":"10.11113/mjfas.v19n4.2954","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2954","url":null,"abstract":"Home-based food was a new trend in food business industry where the sellers’ or the owners’ fully prepared and handled food for sale from their home. This online food business had start blooming since the beginning of the Covid-19 Pandemic due to various factors. Almost every Malaysian can produce and sell foods from their home, even without proper training and knowledge regarding food safety. These products were usually sold on online shopping platform or social media as marketing and ordering tools. The purpose of this research was to evaluate the status of Bacillus cereus that present in the selected home-based food products. Sambal belacan and sambal bilis, both packed in retort pouch and glass jar were chosen as representative samples. A total of 40 samples was purchased through online shopping platform, Shopee, with a pre-determined and appropriate screening. The method was set to simulate the real-life situation of how the home-based food purchasing were made by most peoples. The purchased samples were subjected to the enumeration of Bacillus cereus and total plate count (TPC). From the analysis, it was found that the B. cereus count of 8 out of 40 samples had exceeded the acceptable limit set by the Guidelines for Assessing the Microbiological Safety of Ready-to-Eat Foods, 2009, which is >1x104 CFU/g. This study indicated that the home-based food products still possess a threat regarding the presence of pathogenic anaerobic bacteria. More data and studies were still needed to validate the food safety status of home-based food products in the market.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"48 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79669441","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":"Morphological and Biochemical Responses of Vigna unguiculata ssp. sesquipedalis in Different Zinc Concentrations","authors":"Fenny Ungadau, Raihana Ridzuan, Fazilah Abd Manan","doi":"10.11113/mjfas.v19n4.2796","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2796","url":null,"abstract":"Zinc is an essential trace element required by plants. However, high zinc concentrations can lead to environmental pollution and plant toxicity. This research aimed to investigate how plants respond to different concentrations of zinc (0, 100, 200 and 300 ppm) in soil, using Vigna unguiculata ssp. sesquipedalis (Yard long bean) as a model plant. A total of 12 parameters were collected including plant morphological characteristics such as plant height, leaf number, yield, root length, pod length and fresh weight. Furthermore, key biochemical properties including chlorophyll content, total protein content, total phenolic and flavonoid content in plants were analyzed, in addition to soil pH and electrical conductivity. These parameters were used to determine the morphological and biochemical responses of plants under zinc-stress conditions. The results indicated that different concentrations of zinc significantly decreased the leaf number and pod length V. unguiculata. Soil electrical conductivity was significantly high at 200 ppm zinc. Significant changes in total protein were observed in stems and pods. Moreover, the total phenolic content in leaves showed a significant increase with higher zinc concentrations, while the opposite trend was observed for total phenolic content in V. unguiculata pods. In summary, varying concentrations of zinc had a significant impact on various morphological and biochemical properties of V. unguiculata, exhibiting a distinct pattern specific to each organ. This suggests that V. unguiculata is responsive, adaptive and capable of tolerating abiotic stress induced by a broad range of zinc concentrations.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"9 12 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80635565","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":"Psychospiritual Healing from al-Quran: Internal Aesthetic Factor of Quranic Sound and Its Effects in Activating Greater Brain Regions","authors":"Samhani Ismail, M. F. Reza, Mohd Hanifah Bin Jusoh, Wan Suryani Wan Awang, H. Juahir","doi":"10.11113/mjfas.v19n4.2969","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2969","url":null,"abstract":"Spiritual healing and Quranic sound therapy has long accompanied human tradition since decades. Quranic sound is perceived as rhythmical cues that portrays psychospiritual effects although it was not recited with external melodic intonation (tarannum). Its internal rhythms were believed to activate and synchronize its listeners’ brain rhythms hence modulating their brainwaves to give the psychospiritual effect. However, there is lack of scientific investigation that elucidates source of Quranic linguistic rhythms which contributes to the greater neural activation in the Quran’s listeners. This study aimed to evaluate a Quranic linguistic feature that contributes to high rhythmicity, and high energy that activates its listeners neural ensembles. As a result, Electroencephalography ()’s electrode correlation will be presented as a predictive measure for neural connectivity compared with Arabic News listening. Fatihah Chapter recitation (tajweed without human speech. Spectrogram analysis was performed by using Praat: Doing Phonetics by Computer (PRAAT) software. The continuous brain electrical charges from twenty-eight normal subjects (14 male:14 female) with inclusion criteria of habitual daily Quran listeners were recorded by 128-channel EEG. These brain electrical data were pre-processed and analysed by Fast Fourier Transform (FFT) followed by multivariate analysis. Discriminant Analysis results which compare the mean values of the groups were followed by Multiple Linear Regression. From spectrogram analysis, we found that Fatihah Chapter sound is more rhythmic compared to Arabic news and brings higher energy. . Comparatively, larger-scale integration of neural ensembles from the fronto-temporo-parieto-occipital areas was observed while listening to Quranic Fatihah Chapter recitation than the fronto-temporo-parieto regions from Arabic News listening, indicated of higher synchronisation and integration in neuronal communication during Quranic listening. Dynamic brain network interaction is postulated in a desynchronised pattern, essential for normal brain functioning, reduced pathological tendencies, and emotion-health-cognition stability, offering psychospiritual effects.\u0000 \u0000 \u0000 ","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"30 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86861863","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":"Modeling the Impact of Pollution on Sea Turtles","authors":"Ummu Atiqah MOHD ROSLAN, F. N. Harun","doi":"10.11113/mjfas.v19n4.2913","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2913","url":null,"abstract":"Human activities are currently threatening sea turtles at all life stages, both on nesting beaches and at sea. The debris and toxic waste dumped on the coast or at sea pollutes the sea and puts marine life in danger. In recent years, the number of global turtle population have noticeably decreased, and this is largely due to plastic pollution. However, how the sea pollution affects the sea turtles’ populations is not fully understood. Therefore, in this study, using the mathematical model, we will investigate the impact of pollution on sea turtle population. The model system is analyzed using standard mathematical techniques, including positivity of solutions and stability analysis. Our findings showed that there are two possible equilibrium points (i.e. steady-state solutions) for the model proposed, in which the stability analysis showed that only one of the solutions is asymptotically stable. Thus, the conditions of stability for both equilibrium points were also derived analytically based on their eigenvalues. As for the numerical simulations, the parameter of contamination rate is varied to investigate the effect of pollution on the population of sea turtles. The results suggested that if the contamination rate is high, then the population of sea turtles are expected to decrease and extinct approximately within 10 years. The comparison of survival and extinction of sea turtles are shown using the time series plots.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"97 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74252133","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":"Univariate and Multivariate Long Short Term Memory (LSTM) Model to Predict Covid-19 Cases in Malaysia Using Integrated Meteorological Data","authors":"Ng Wei Shen, A. Abu Bakar, Hazura Mohamad","doi":"10.11113/mjfas.v19n4.2814","DOIUrl":"https://doi.org/10.11113/mjfas.v19n4.2814","url":null,"abstract":"The rate of transmission of coronavirus disease (COVID-19) has been very fast since the first reported case in December 2019 in Wuhan, China. The disease has infected more than 3 million people worldwide and resulted in more than 224 thousand deaths as of May 1, 2020, reported by The World Health Organization (WHO). In the past, meteorological parameters such as temperature and humidity were essential and effective factors against serious infectious diseases such as influenza and Severe Acute Respiratory Syndrome (SARS). Therefore, exploring the relationship between meteorological factors and active COVID-19 cases is essential. This study employs the long-short term memory (LSTM) method to predict Covid-19 Cases in Malaysia. We propose a univariate and multivariate model using Covid-19 cases and meteorology data. The univariate LSTM model uses Covid-19 active cases data in a year as a control attribute for model development. The multivariate LSTM model uses the integrated Covid-19 cases, and meteorology data consists of attributes: minimum, maximum, and average values of Humidity, Temperature, Windspeed, and Pressure from 13 states of Malaysia. The model's performance is evaluated using errors such as MAE, RMSE, MAPE, and the R2 Score. The low errors and higher R2 score indicate the model's excellent performance. We observed that the univariate LSTM model gives the least error in five states, indicating that those states' daily active cases are the main contributing factors. In the multivariate LSTM model, the daily cases and humidity, temperature, and windspeed are the main factors in several different states. The result of the study is to help the government to prevent and manage the spread of the COVID-19 and other upcoming pandemic better.","PeriodicalId":18149,"journal":{"name":"Malaysian Journal of Fundamental and Applied Sciences","volume":"137 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86482993","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}