Browsing by Author "Osman, Hamid"

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A Critical Review on the Potency of Phytoconstituents in the Management of COVID-19
(JPAM, 2023-09-02) Raman, Kannan; Rajagopal, Kalirajan; Swaminathan, Gomathi; Jupudi, Srikanth; Dhama, Kuldeep; Barua, Rashu; Emran, Talha Bin; Osman, Hamid; Khandaker, Mayeen Uddin
Natural products and their derivatives have traditionally been used as a source of therapeutic agents. Their beneficial properties are due to large varieties in their chemical structures and biochemical actions. The discovery of natural products such as phytoconstituents have crucial role in the development of less toxic and more effective drugs. Phytoconstituents have shown to be beneficial in treating viral diseases such as the previous chikungunya virus, hepatitis C virus, SARS, and MERS viral diseases. Flavonoids, alkaloids, terpenoids, and other group of compounds combat against COVID-19 in several ways like by protease inhibition, spike protein inhibition, Nrf2 inhibition. The accumulation of NRF2 inhibits the development of the SARS-CoV-2 virus and stimulates anti-inflammatory action. The present review highlights the therapeutic importance of compounds isolated from medicinal plants and/or herbs, such as crude extracts of Curcumin I-III, Leptodactylone, Ginsenoside-Rb1, Lycorine, Reserpine, Saikosaponin B2, Cepharanthine, Withanoside V, Gingerol, Piperanine, chromans, flavonoids, Amentoflavone etc. against SARS-CoV-2. Natural products are typically safe, stable, and dependable source for finding drugs to control the current pandemic. Antiviral secondary metabolites many medicinal plants have given ingredients that were isolated. The selected plants based phytoconstituents may potentially be used against viruses’ development on anti-SARS-CoV-2 to offer a reference point in this field.
A Multiwall Path-Loss Prediction Model Using 433 MHz LoRa-WAN Frequency to Characterize Foliage’s Influence in a Malaysian Palm Oil Plantation Environment
(Daffodil International University, 2022-07-20) Anzum, Rabeya; Habaebi, Mohamed Hadi; Islam, Md Rafiqul; Hakim, Galang P. N.; Khandaker, Mayeen Uddin; Osman, Hamid; Alamri, Sultan; AbdElrahim, Elrashed
Palm oil is the main cash crop of tropical Asia, and the implementation of LPWAN (low- power wide-area network) technologies for smart agriculture applications in palm oil plantations will benefit the palm oil industry in terms of making more revenue. This research attempts to characterize the LoRa 433 MHz frequency channels for the available spreading factors (SF7-SF12) and bandwidths (125 kHz, 250 kHz, and 500 kHz) for wireless sensor networks. The LoRa channel modeling in terms of path-loss calculation uses empirical measurements of RSS (received signal strength) in a palm oil plantation located in Selangor, Malaysia. In this research, about 1500 LoS (line-of-sight) and 300 NLoS (non-line-of-sight) propagation measurement data are collected for path-loss prediction modeling. Using the empirical data, a prediction model is constructed. The path-loss exponent for LoS propagation of the proposed prediction model is found to be 2.34 and 2.9 for 125–250 kHz bandwidth and 500 kHz bandwidth, respectively. Again, for the NLoS propagation links, the attenuation per trunk is found to be 7.58 dB, 7.04 dB, 5.35 dB, 5.02 dB, 5.01 dB, and 5 dB for SF7-SF12, and the attenuation per canopy is found to be 9.32 dB, 7.96 dB, 6.2 dB, 5.89 dB, 5.79 dB, and 5.45 dB for SF7-SF12. Moreover, the prediction model is found to be the better choice (mean RMSE 2.74 dB) in comparison to the empirical foliage loss models (Weissberger’s and ITU-R) to predict the path loss in palm oil plantations.
A pioneering study of the radiological mapping in the world's largest mangrove forest (the Sundarbans) and implications for the public and environment
(Scopus, 2024-04-30) Mahmud, Jubair Al; Siraz, M.M. Mahfuz; Alam, M.S.; Dewan, Md. Jafor; Rashid, Md. Bazlar; Khandaker, Mayeen Uddin; Osman, Hamid; Tamam, Nissren
Coastal Mangroves are facing growing threats due to the harmful consequences of human activities. This first-ever detailed study of natural radioactivity in soil samples collected from seven tourist destinations within the Sundarbans, the world's largest mangrove forest, was conducted using HPGe gamma-ray spectrometry. Although the activity levels of 226Ra (11 ± 1–44 ± 4 Bq/kg) and 232Th (13 ± 1 68 ± 6 Bq/kg) generally align with global averages, the concentration of 40K (250 ± 20–630 ± 55 Bq/kg) was observed to surpass the worldwide average primarily due to factors like salinity intrusion, fertilizer application, agricultural runoff, which suggests the potential existence of potassium-rich mineral resources near the study sites. The assessment of the hazard parameters indicates that the majority of these parameters are within the recommended limits. The soil samples do not pose a significant radiological risk to the nearby population. The results of this study can establish important radiological baseline data before the Rooppur Nuclear Power Plant begins operating in Bangladesh.
An Alternative Method for Calculation of Half-Value Layers without the Knowledge of Attenuation Coefficient
(Elsevier, 2023-09-15) Hassanpour, Mehdi; Hassanpour, Marzieh; Khandaker, Mayeen Uddin; Faruque, Mohammad Rashed Iqbal; Alshahrani, B.; Osman, Hamid
Radiation protection is crucial for the safe utilization of ionizing radiation and minimizing the harmful effect upon exposure, hence some standards have been defined by some relevant organizations for the safe uses of radiation. One of the parameters relevant to the calculation of gamma ray shielding is the half-value layer (HVL), which is normally calculated using the knowledge of linear attenuation coefficient (μ). In this research, an attempt has been made to directly calculate HVL without the knowledge of μ via Monte Carlo simulation technique. For this purpose, in the Monte Carlo N‐Particle eXtended (MCNPX) code, F1, F5 and Mesh Popul sequences tallies were defined and the optimal structure for the least measurement error was introduced. The MCNPX calculated values showed reasonable agreement with the experimental findings. According to the obtained results, it is suggested that in order to reduce the error of HVL calculations, in exchange for the MCNPX code, the values of the R parameter and the radiation angle of the source should be considered according to the calculations introduced in this plan. Because the results show that by considering the measurement error between 6 and 20%, the code output can be cited in different energy ranges.
Assessing Radioactivity in Soil in the Vicinity of Steel Production Industries
(Taylor & Francis Group, 2023-12-12) Siraz, M. M. Mahfuz; Alam, M. S.; Mahmud, Jubair Al; Rashid, Md. Bazlar; Hossain, Z.; Elrahim, Elrashed Abd; Osman, Hamid; Khandaker, Mayeen Uddin; Yeasmin, S.
The steel production process results in the emission of naturally occurring radioactive and toxic heavy metals, which are inherent in the raw materials employed as the initial components. To assess the public exposure through atmospheric dispersions of such radiotoxic metals originating from the production plants and the disposal of associated wastes in nearby landfills, a pioneering study was conducted to assess the radioactivity in forty-four soil samples collected from the environs of sixteen different steel mills in the megacity of Dhaka, Bangladesh, using high-purity germanium (HPGe) γ-ray spectrometry. The results indicated activity ranges of 6 ± 1 to 37 ± 3 Bq/kg, 6 ± 1 to 45 ± 4 Bq/kg, and 101 ± 9 to 470 ± 45 Bq/kg for 226Ra, 232Th, and 40K, respectively, in the soil samples. Radiological hazard parameters were assessed, and none surpassed the recommended limits set by various international organisations. These results underscore that soil samples obtained from the vicinity of the steel mills do not present an immediate and significant risk to the local community in terms of radiation hazards. Nevertheless, given the observed physical alterations in the soil samples, likely resulting from chemical reactions with pollutants released from the steel mills, it is advisable to refrain from using the examined soil samples for agricultural or construction purposes. This study aims to establish a foundational dataset, serving as a crucial reference for the upcoming commissioning of the Rooppur Nuclear Power Plant in the fiscal year 2024–25. This study advocates for the adoption of a systematic and regular monitoring programme to assess radiation levels in the vicinity of steel production industries across the country.
Awareness Level, Knowledge and Attitude Towards Breast Cancer Among Staff and Students of Hail University, Saudi Arabia
(PLOS ONE, 2023-03-15) Almeshari, Meshari; Alzamil, Yasser; Alyahyawi, Amjad; Abanomy, Ahmad; Althmali, Omar; Al-Enezi, Mamdouh S.; G., ShashiKumar C.; Osman, Hamid; Khandaker, Mayeen Uddin
Introduction Awareness of screening procedures and illness warning signals is critical for expanding and implementing screening programs in society, which would improve the odds of early identification of breast cancer. Objectives This study aimed to evaluate the knowledge, awareness, attitudes, and practices related to breast cancer risk factors, signs, symptoms and methods of screening among female faculty and students at Hail University in the Kingdom of Saudi Arabia. Methods A cross-sectional study was conducted from January 2021 through February 2021 in the Hail region of Saudi Arabia. A closed-ended questionnaire, which consisted of 37 questions, was distributed online (using a Google Forms link) in both English and Arabic languages. Data was collected from 425 female subjects who participated in the study. Results The study showed an overall knowledge level of 46.36% regarding breast cancer. Participants had average knowledge about risk factors, signs, and symptoms, whereas their awareness and practice of breast self-examination and screening methods were weak.
Cancerous and Non-Cancerous Brain MRI Classification Method Based on Convolutional Neural Network and Log-Polar Transformation
(Daffodil International University, 22-09-09) Jibon, Ferdaus Anam; Khandaker, Mayeen Uddin; Miraz, Mahadi Hasan; Thakur, Himon; Rabby, Fazle; Tamam, Nissren; Sulieman, Abdelmoneim; Itas, Yahaya Saadu; Osman, Hamid
Magnetic resonance imaging (MRI) offers visual representations of the interior of a body for clinical analysis and medical intervention. The MRI process is subjected to a variety of image processing and machine learning approaches to identify, diagnose, and classify brain diseases as well as detect abnormalities. In this paper, we propose an improved classification method for distinguishing cancerous and noncancerous tumors from brain MRI images by using Log Polar Transformation (LPT) and convolutional neural networks (CNN). The LPT has been applied for feature extraction of rotation and scaling of distorted images, while the integration of CNN introduces a machine learning approach for the tumor classification of distorted images. The dataset was formed with images of seven different brain diseases, and the training set was formed by applying CNN with the extracted features. The proposed method is then evaluated in comparison to state-of-the-art algorithms, showing a definite improvement of the former. The obtained results show that the machine learning approach offers better classification with a success rate of about 96% in both plain brain MR images and rotation- and scale-invariant brain MR images. This work also successfully classified T-1 and T-2 weighted images of neoplastic and degenerative brain diseases. The obtained accuracy is perfected by several kernel procedures, while the combined performance of the two wavelet transformations and a strong dataset make our method robust and efficient. Since no earlier study on machine learning approaches with rotated and scaled brain MRI has come to our attention, it is expected that our proposed method introduces a new paradigm in this research field.
Corrigendum to “investigation of Structural and Tl Kinetic Parameters of Smartphone Screen Protector Glasses for Applications in Retrospective Dosimetry”
(Elsevier, 2024-09-02) Muslima, Umme; Khandaker, Mayeen Uddin; Nawi, S.N. Mat; Lam, S.E.; Sani, S.F. Abdul; Bradley, D.A.; Saidur, R.; Tan, Y.S.; Osman, Hamid; Hanfi, Mohamed Y.; Issa, Shams A.M.
DFT Studies of the Photocatalytic Properties of MoS2-Doped Boron Nitride Nanotubes for Hydrogen Production
(American Chemical Society, 2023-10-04) Itas, Yahaya Saadu; Suleiman, Abdussalam Balarabe; Ndikilar, Chifu E.; Lawal, Abdullahi; Razali, Razif; Ullah, Md Habib; Osman, Hamid; Khandaker, Mayeen Uddin
This study investigated the photocatalytic properties of MoS2-doped boron nitride nanotubes (BNNTs) for overall water splitting using popular density functional theory (DFT). Calculations of the structural, mechanical, electronic, and optical properties of the investigated systems were performed using both the generalized gradient approximation and the GW quasi-particle correction methods. In our calculations, it was observed that only (10, 10) and (12, 12) single-walled BNNTs (SWBNNTs) turned out to be stable toward MoS2 doping. Electronic property calculations revealed metallic behavior of (10, 10)-MoS2-doped SWBNNTs, while the band gap of (12, 12) SWBNNT was narrowed to 2.5 eV after MoS2 doping, which is within the obtained band gaps for other photocatalysts. Hence, MoS2 influences the conduction band of pure BNNT and improves its photocatalytic properties. The water-splitting photocatalytic behavior is found in (12, 12) MoS2-doped SWBNNT, which showed higher water oxidation (OH–/O2) and reduction (H+/H2) potentials. In addition, optical spectral calculations showed that MoS2-doped SWBNNT had an optical absorption edge of 2.6 eV and a higher absorption in the visible region. All of the studied properties confirmed MoS2-doped SWBNNT as a better candidate for next-generation photocatalysts for hydrogen evolution through the overall water-splitting process.
Ensuring radiation safety: Evaluating dose and compliance among medical staff at King Faisal Medical Complex, Saudi Arabia
(Scopus, 2024-09) Hassan, W B; Osman, Hamid; Alosaimi, Meshari; AbuRkbah, Ahmed; AlQurashi, Ahmed; Elkhade, Bahaaedin A Elkhade; Alzahrani, Ahmad; Alshehri, Mohammed; Faizo, Nahla L; Khandaker, Mayeen Uddin
Background: Radiation is an integral part of routine medical practice, but it carries a risk to the health of medical staff. Hence, it should be assessed periodically. The study's goal was to quantify the levels of radiation exposure for medical staff at King Faisal Medical Complex (KFMC), Taif City Saudi Arabia, and to assess their radiation protective procedures in practice. Methods: The study looked at the thermoluminescence dosimeters (TLDs) records of 50 medical professionals who were exposed to radiation while working at KFMC from 2019 to 2020 in Taif city, Saudi Arabia. In Riyadh, radiation exposure is read from skin TLDs using Harshaw model 6600 plus detectors. The Excel software was utilized to process the obtained data for calculating effective doses. A questionnaire was also distributed to the medical staff to assess their radiation protection procedures. The Statistical Package for Social Sciences (SPSS) program version 23 was used to analyze the obtained data. Results: The mean annual effective doses of the medical staff in 2019 and 2020 were determined to be 1.14 mSv and 1.4645 mSv, respectively, with no significant difference in effective doses between males and females in either year. The socio-demographic features of the medical personnel were examined, and the findings revealed that the majority of participants were male radiological technologists. The rate of adherence to radiation protection techniques was 68%, with a normally distributed dispersal. The amount of adherence varied significantly depending on nationality, occupation, and academic qualification. Conclusion: According to the research, the mean annual effective dosage for medical professionals at KFMC was significantly below the recommended level, indicating satisfactory compliance with the ALARA radiation safety concept.
Ensuring Radiation Safety: Evaluating Dose and Compliance among Medical Staff at King Faisal Medical Complex, Saudi Arabia
(Elsevier, 2024-09-15) Hassan, W.B.; Osman, Hamid; Alosaimi, Meshari; Rkbah, Ahmed Abu; Al Qurashi, Ahmed; Elkhader, Bahaaedin A.; Alzahrani, Ahmad; Alshehri, Mohammed; Faizo, Nahla L.; Khandaker, Mayeen Uddin
Background: Radiation is an integral part of routine medical practice, but it carries a risk to the health of medical staff. Hence, it should be assessed periodically. The study's goal was to quantify the levels of radiation exposure for medical staff at King Faisal Medical Complex (KFMC), Taif City Saudi Arabia, and to assess their radiation protective procedures in practice. Methods: The study looked at the thermoluminescence dosimeters (TLDs) records of 50 medical professionals who were exposed to radiation while working at KFMC from 2019 to 2020 in Taif city, Saudi Arabia. In Riyadh, radiation exposure is read from skin TLDs using Harshaw model 6600 plus detectors. The Excel software was utilized to process the obtained data for calculating effective doses. A questionnaire was also distributed to the medical staff to assess their radiation protection procedures. The Statistical Package for Social Sciences (SPSS) program version 23 was used to analyze the obtained data. Results: The mean annual effective doses of the medical staff in 2019 and 2020 were determined to be 1.14 mSv and 1.4645 mSv, respectively, with no significant difference in effective doses between males and females in either year. The socio-demographic features of the medical personnel were examined, and the findings revealed that the majority of participants were male radiological technologists. The rate of adherence to radiation protection techniques was 68%, with a normally distributed dispersal. The amount of adherence varied significantly depending on nationality, occupation, and academic qualification. Conclusion: According to the research, the mean annual effective dosage for medical professionals at KFMC was significantly below the recommended level, indicating satisfactory compliance with the ALARA radiation safety concept.
Estimation of the concurrent radiological dosage to humans due to the transfer of 226Ra, 228Ra, and 40K from soil-to-Malaysian traditional medicinal plants
(2024-10-22) Shuaibu, Hauwau Kulu; Mohamed, Faizal; Khandaker, Mayeen Uddin; Ismail, Aznan Fazli; Osman, Hamid
Medicinal plants have been incorporated into various traditional medicine systems worldwide to reduce disease risk, treat illnesses, and provide medicinal remedies. Today, the pharmaceutical industry uses the most active plant compounds in drug synthesis. Possible high levels of naturally occurring radionuclides in medicinal plants have raised public concern about the consequent radiological impact on the consumption of medicinal plants and herbs. This paper reports the first study of soil-to-plant mobilities of natural radionuclides in native medicinal plants in Malaysia. Representative samples of soils and organically grown traditional medicinal plants from western Malaysia were collected and studied using HPGe gamma-ray spectrometry. Average activity concentrations for 226Ra, 228Ra, and 40K in the soils are respectively 57, 84, and 520 Bq/kg, and the respective values in the medicinal plants are 10, 4, and 498 Bq/kg. The respective transfer factors (TFs) for the medicinal leaves are 0.18, 0.05, and 1.18. The TFs of 40K were higher than others due to higher uptake and its essentiality in plant growth. These findings indicate that plant growth habits greatly influenced the radionuclides' uptake. The radioactivities in soils and their corresponding mobilities are in accordance with literature data. To discard any radiological hazards to human health, the estimated threshold consumption rate is found to be approximately 46 kg/y. Annual effective doses and excess lifetime cancer risk for adult members of the public due to the consumption of medicinal plants are found to be negligible. It is suggested that the use of traditional medicinal plants may provide a risk-free and safe means of maintaining public health.
Eucalyptus globulus Extract-Assisted Fabrication of Copper Oxide/Zinc Oxide Nanocomposite for Photocatalytic Applications
(Daffodil International University, 2022-08-16) Hafeez, Muhammad; Ghazal, Arooba; Khan, Jahanzeb; Ahmad, Pervaiz; Khandaker, Mayeen Uddin; Osman, Hamid; Alamri, Sultan
In this work, we report the engineering of sub 30 nm nanoparticles of copper oxide (CuO) and Zinc oxide (ZnO) and their nanocomposite, using a green method, to degrade an organic dye (methyl orange) that is responsible for water pollution. The plant extract of Eucalyptus globulus was used as a capping and stabilizing agent, as it is non-toxic, easy to use, and affordable. The percent purity and composition of the samples were found using Energy Dispersive Spectroscopy (EDS), which confirmed the formation of 75% CuO nanoparticles, 77.81% ZnO nanoparticles, and 77.34% ZnO/CuO nanocomposite in respective samples. Morphological analysis was achieved using Scanning Electron Microscopy (SEM). FTIR investigations revealed that the vibrations of CuO and ZnO nanoparticles and CuO/ZnO nanocomposite were observed at 568 cm−1, 617.9 cm−1, and 475 cm−1, respectively. The bandgap of the synthesized CuO and ZnO nanoparticles, and ZnO/CuO nanocomposite was analyzed using Diffuse Reflectance Spectroscopy (DRS), and found to be 3.36 eV, 1.83 eV, and 1.48 eV, respectively. Best photocatalytic activity confirmed that favorable conditions for the maximum degradation of methyl orange are at pH 12 and 0.02 g of the photocatalyst is required.
Evaluation of Radioactivity in Soil and Rock Samples From an Undiscovered Sea Beach in the Southeastern Coastline of Bangladesh and Associated Health Risk
(Springer, 2023-08-10) Siraz, M.M. Mahfuz; Kamal, Md Hossain; Khan, Zulfiqar Hasan; Alam, M. S.; Mahmud, Jubair Al; Rashid, Md Bazlar; Khandaker, Mayeen Uddin; Osman, Hamid; Yeasmin, S.
This study marks the first-ever assessment of radiological hazards linked to the sands and rocks of Patuartek Sea Beach, situated along one of the world's longest sea beaches in Cox' Bazar of Bangladesh. Through the utilization of an HPGe detector, a comprehensive analysis of the activity concentrations of 226Ra, 232Th, and 40 K was conducted, and their activity ranged from 7 to 23 Bq/kg, 9-58 Bq/kg, and 172-340 Bq/kg, respectively, in soils, and 19-24 Bq/kg, 27-39 Bq/kg, and 340-410 Bq/kg, respectively, in rocks. Some sand samples exhibited elevated levels of 232Th, while the rock samples displayed higher levels of 40 K compared to the global average. The radiological hazard parameters were assessed, and no values surpassed the recommended limits set by several international organizations. Hence, the sands and rocks of Patuartek sea beach pose no significant radiological risk to the residents or tourists. The findings of this study provide crucial insights for the development of a radiological baseline map in the country, which is important due to the commissioning of the country's first nuclear power plant Rooppur Nuclear Power Plant. The data may also stimulate interest in the rare-earth minerals present in the area, which is important for the electronics industry, thorium-based nuclear fuel cycles.
Evaluations of Paranasal Sinus Disease Using Multidetector Computed Tomography in Taif City, Saudi Arabia
(IMRDC, 2023-07-31) Alotaibi, Osama; Osman, Hamid; Hadi, Yasser; Alzamil, Yasser; Alyahyawi, Amjad; Al-Enezi, Mamdouh S.; Alafer, Feras; Abanomy, Ahmad; Khandaker, Mayeen Uddin; Almeshari, Meshari
Background: This study aimed to evaluate paranasal sinusitis disease and determine if there is a relationship between the anatomical variation of sinusitis based on the age and gender of the patient and, if so, to identify the most affected demographic group. Methods and Results: This study included 130 patients (76 men and 54 women with ages ranging from 18 years to 75 years) diagnosed with PNS disease and was conducted in the Radiology Department of King Abdelaziz Specialist Hospital and King Faisal Hospital (Taif city, Saudi Arabia) from January 1 2021 to January 31 2022. The evaluation of sinusitis was conducted using multidetector computed tomography (MDCT). The clinical symptoms included 70% cases of nasal obstruction, 53% cases of headache, 28.5% cases of nasal discharge, 17.7% cases of facial pain, and 3.1% cases of general malaise. The types of sinusitis included maxillary sinusitis (88.5%), sphenoid sinusitis (28.5%), ethmoid sinusitis (43.8%), and frontal sinusitis (23.5%). The study found no significant anatomical variation of sinuses based on age and gender (P>0.05). Conclusion: An evaluation of paranasal sinusitis disease using an MDCT scan shows that there are no gender or age-related differences in the prevalence of the disease. Moreover, the study demonstrates that there is no significant anatomical variation of sinuses based on age and gender.(International Journal of Biomedicine. 2022;12(4):575-579.).
Evaluations of Paranasal Sinus Disease Using Multidetector Computed Tomography in Taif City, Saudi Arabia
(Scopus, 22-11-29) Alotaibi, Osama; Osman, Hamid; Hadi, Yasser; Alzamil, Yasser; Alyahyawi, Amjad; Al-Enezi, Mamdouh S.; Alafer, Feras; Abanomy, Ahmad; Khandaker, Mayeen Uddin; Almeshari, Meshari
Background: This study aimed to evaluate paranasal sinusitis disease and determine if there is a relationship between the anatomical variation of sinusitis based on the age and gender of the patient and, if so, to identify the most affected demographic group. Methods and Results: This study included 130 patients (76 men and 54 women with ages ranging from 18 years to 75 years) diagnosed with PNS disease and was conducted in the Radiology Department of King Abdelaziz Specialist Hospital and King Faisal Hospital (Taif city, Saudi Arabia) from January 1 2021 to January 31 2022. The evaluation of sinusitis was conducted using multidetector computed tomography (MDCT). The clinical symptoms included 70% cases of nasal obstruction, 53% cases of headache, 28.5% cases of nasal discharge, 17.7% cases of facial pain, and 3.1% cases of general malaise. The types of sinusitis included maxillary sinusitis (88.5%), sphenoid sinusitis (28.5%), ethmoid sinusitis (43.8%), and frontal sinusitis (23.5%). The study found no significant anatomical variation of sinuses based on age and gender (P>0.05). Conclusion: An evaluation of paranasal sinusitis disease using an MDCT scan shows that there are no gender or age-related differences in the prevalence of the disease. Moreover, the study demonstrates that there is no significant anatomical variation of sinuses based on age and gender.(International Journal of Biomedicine. 2022;12(4):575-579.). Keywords: paranasal sinus • sinusitis • multidetector computed tomography
Exploring the thermoluminescence characteristics of smartphone screen safety glasses for retrospective dosimetry applications
(2024-10-24) Muslima, Umme; Khandaker, Mayeen Uddin; Lam, S.E.; Nawi, S.N. Mat; Abdul Sani, S.F.; Ung, N.M.; Osman, Hamid; Y. Hanfi, Mohamed; Sayyed, M.I.; Alzimami, Khalid; Alqahtani, Amal; Bradley, D.A.
In clinical settings, standard dosimeters might miss radiation mishaps. Retrospective dosimeters could help to track personnel (such as patients and other staff who don't wear dosimeters) exceeding safe limits and assess long-term exposure trends. This study has investigated key thermoluminescence (TL) dosimetric characteristics, including the glow curve structure, dose-response, energy dependence, sensitivity and fading of various safety glasses that are used as screen protectors of smartphones subjected to photon irradiation. Among the studied glasses, the HD Anti-Peep safety glass for iPhone has been found to exhibit a linear dose-response with a regression coefficient of 99% within the dose range of 2–10 Gy. Moreover, all the safety glasses showed independence with respect to photon energy of 6 MV and 10 MV. The TL glow curves of the samples showed a broad glow peak between 125 °C and 325 °C at 10 Gy. The TL kinetic parameters of the safety glasses were also studied by analyzing the glow curves using the peak shape and initial rise method. The geometric factor (μg) is found to be within the range of 0.43–0.53, which indicates the suitability of applying Chen's general-order formula to calculate the kinetic parameters such as activation energy, frequency factor and trap lifetime. The activation energy (E) and frequency factor (s) are found in the range of 0.31–0.54 eV and 4.55 × 103 to 2.12 × 106 s−1 respectively obtained via the peak shape method. The relatively long trap lifetime and observed thermoluminescence features indicate that the HD Anti-Peep safety glass offers a better option to estimate dose retrospectively to ensure the safety of human health.
Exploring the Thermoluminescence Characteristics of Smartphone Screen Safety Glasses for Retrospective Dosimetry Applications
(Elsevier, 2024-10-15) Muslima, Umme; Khandaker, Mayeen Uddin; Lam, S.E.; Mat Nawi, S.N.; Sani, S.F. Abdul; Ung, N.M.; Osman, Hamid; Hanfi, Mohamed Y.; Sayyed, M.I.; Alzimami, Khalid; Alqahtani, Amal; Bradley, D.A.
In clinical settings, standard dosimeters might miss radiation mishaps. Retrospective dosimeters could help to track personnel (such as patients and other staff who don't wear dosimeters) exceeding safe limits and assess long-term exposure trends. This study has investigated key thermoluminescence (TL) dosimetric characteristics, including the glow curve structure, dose-response, energy dependence, sensitivity and fading of various safety glasses that are used as screen protectors of smartphones subjected to photon irradiation. Among the studied glasses, the HD Anti-Peep safety glass for iPhone has been found to exhibit a linear dose-response with a regression coefficient of 99% within the dose range of 2–10 Gy. Moreover, all the safety glasses showed independence with respect to photon energy of 6 MV and 10 MV. The TL glow curves of the samples showed a broad glow peak between 125 °C and 325 °C at 10 Gy. The TL kinetic parameters of the safety glasses were also studied by analyzing the glow curves using the peak shape and initial rise method. The geometric factor (μg) is found to be within the range of 0.43–0.53, which indicates the suitability of applying Chen's general-order formula to calculate the kinetic parameters such as activation energy, frequency factor and trap lifetime. The activation energy (E) and frequency factor (s) are found in the range of 0.31–0.54 eV and 4.55 × 103 to 2.12 × 106 s−1 respectively obtained via the peak shape method. The relatively long trap lifetime and observed thermoluminescence features indicate that the HD Anti-Peep safety glass offers a better option to estimate dose retrospectively to ensure the safety of human health.
First-principles study of the structural, mechanical, electronic, optical, and elastic properties of non-toxic XGeBr3 (X=K, Rb, and Cs) perovskite for optoelectronic and radiation sensing applications
(2024-06-01) l Miah, Md. Hela; Noor-E- Ashrafi; Bulu Rahman, Md.; Nur-E-Alam, Mohammad; Aminul Islam, Mohammad; Naseer, K.A.; Y. Hanfi, Mohamed; Osman, Hamid; Khandaker, Mayeen Uddin
In this study, a comprehensive analysis of the structural, electronic, optical, and elastic properties of cubic perovskite structure was carried out using GGA-PBE functional based density functional theory in CASTEP code. The simulated values of the lattice parameter were increased with the changing of X from K to Cs (a = 5.51 Å, 5.54 Å, and 5.59 Å respectively). All the compounds possessed direct band gaps and acquired values for the structures , and were 0.525 eV, 0.599 eV, and 0.708 eV, respectively. Furthermore, the atomic orbital's contribution to the formation of band structure was clarified thoroughly. The thermodynamic, as well as the mechanical stability, has been accomplished with the assurance of negative formation energy and Born-Huang approximation. In addition, a larger shearing modulus attained by manifests its strength. Moreover, all structures bear the proof of having ductility and existing central force inside the structures. Finally, the calculated anisotropic index notifies that all structures exhibit anisotropy with the trend of < < . This is also authenticated through the 3D anisotropy contour plot generated by utilizing ELATE software, which is for the first time in regard to the comparative scenario among them. With the investigation of the optical characteristics of the compounds , intriguing features such as broad absorption spectrum, high dielectric function and refractive index at zero photon's energy, and high conductivity have been affirmed accompanying the marginal value of loss function as well as reflectivity that elevates the probability of being employed in optoelectronic applications along with different absorber layers of tandem solar cells. In addition, these compounds could be used as radiation detectors since they have broad absorption at extreme ultraviolet rays.
Investigation of structural and TL kinetic parameters of smartphone screen protector glasses for applications in retrospective dosimetry
(2024-11-15) Muslima, Umme; Khandaker, Mayeen Uddin; Mat Nawi, S.N.; Lam, S.E.; Abdul Sani, S.F.; Bradley, D.A.; Saidur, R.; Tan, Y.S.; Osman, Hamid; Y. Hanfi, Mohamed; A.M. Issa, Shams
The study evaluated the structural and thermoluminescence (TL) kinetic parameters of smartphone screen protector glasses in order to use them for post-accident dose reconstruction from unplanned nuclear events. The fact that most individuals use mobile phones in working environments including nuclear power plant sites, served as the impetus for the study. The TL glow curves indicate the physical properties of the defects involved in the luminescence process; therefore, they have been analyzed to study the TL kinetic parameters by employing peak shape, initial rise and glow curve deconvolution method within the dose ranges from 2 to 50 Gy. The geometric factor (μg) ranges between 0.46 and 0.56, suggesting that Chen's general-order method can be used to compute the kinetic parameters, including activation energy (E), frequency factor (s) and trap lifetime (τ). The examined trapping parameters (E = 0.33–0.57 eV, s = 5.22E+03–8.65E+06 s−1 for peak shape and E = 0.36–0.96 eV, s = 2.90E+04–1.88E+11 s−1 for initial rise methods) suggest promise for TL dosimetry applications. Additionally, the observed lifetime (τ = 4.88E+5 s) implies the feasibility of dose reconstruction even several days after an accident, making it suitable for retrospective dosimetry. Micro-Raman spectroscopy revealed a clear correlation between increasing gamma radiation dose and microstructural damage. The analysis of intensity ratio (ID/ISi) for other components to silica, along with the area of deconvoluted micro-Raman spectra in high-frequency regions, indicated dose-dependent structural modifications and internal defect annealing. Further confirmation of structural alterations within the studied dose range was obtained through the analysis of crystallite size (Lc), dislocation density (δ), lattice strain (ɛ) and FWHM (Full Width at Half Maximum) from XRD (X-ray diffraction) patterns. These findings collectively suggest the potential of smartphone screen protector glass as a viable material for emergency dosimetry applications.