Mohammed Haqi Al-Tai, Bashar M. Nema, Ali Al-Sherbaz
The use of Deep Learning (DL) for identifying false or misleading information, known as fake news, is a growing area of research. Deep learning, a form of machine learning that utilizes algorithms to learn from large data sets, has shown promise in detecting fake news. The spread of fake news can cause significant harm to society economically, politically, and socially, and it has become increasingly important to find ways to detect and stop its spread. This paper examines current studies that use deep learning methods, such as Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs), as well as the multi-model approach, to detect fake news. It also looks at the use of word embedding models to convert text to vector representations and the datasets used for training models. Furthermore, the paper discusses the use of the attention mechanism in conjunction with deep learning to process sequential data.
{"title":"Deep Learning for Fake News Detection: Literature Review","authors":"Mohammed Haqi Al-Tai, Bashar M. Nema, Ali Al-Sherbaz","doi":"10.23851/mjs.v34i2.1292","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1292","url":null,"abstract":" \u0000The use of Deep Learning (DL) for identifying false or misleading information, known as fake news, is a growing area of research. Deep learning, a form of machine learning that utilizes algorithms to learn from large data sets, has shown promise in detecting fake news. The spread of fake news can cause significant harm to society economically, politically, and socially, and it has become increasingly important to find ways to detect and stop its spread. This paper examines current studies that use deep learning methods, such as Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs), as well as the multi-model approach, to detect fake news. It also looks at the use of word embedding models to convert text to vector representations and the datasets used for training models. Furthermore, the paper discusses the use of the attention mechanism in conjunction with deep learning to process sequential data.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84609063","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}
The security of home doors has become one of the necessities in this era. The Internet of Things (IoT) technology has also entered into building the smart home. Therefore, it has become necessary to develop a facial recognition system that can be implemented on IoT devices. This study presented a method to recognize faces using the efficientnet-b4. Transfer learning with fine-tuning was used here due to the small dataset size and high accuracy (accuracy of Top-1= 82.9% and accuracy of Top-5 = 96.4%) of EfficientNet-B4 and it has fewer parameters (19.5 M) than the previously known model and this is what we are looking for in order to implement it on the Raspberry Pi. After training and saving the model, it is converted into a lightweight model and transferred to the Raspberry to distinguish faces. The results showed that the model had an accuracy of 97%, despite the fact that the collected images were taken in different lighting, different places, and different facial expressions.
{"title":"A New Smart Home Intruder Detection System Based on Deep Learning","authors":"Hiba Hameed Ali, Jolan Rokan Naif, Waleed Rasheed Humood","doi":"10.23851/mjs.v34i2.1267","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1267","url":null,"abstract":"The security of home doors has become one of the necessities in this era. The Internet of Things (IoT) technology has also entered into building the smart home. Therefore, it has become necessary to develop a facial recognition system that can be implemented on IoT devices. This study presented a method to recognize faces using the efficientnet-b4. Transfer learning with fine-tuning was used here due to the small dataset size and high accuracy (accuracy of Top-1= 82.9% and accuracy of Top-5 = 96.4%) of EfficientNet-B4 and it has fewer parameters (19.5 M) than the previously known model and this is what we are looking for in order to implement it on the Raspberry Pi. After training and saving the model, it is converted into a lightweight model and transferred to the Raspberry to distinguish faces. The results showed that the model had an accuracy of 97%, despite the fact that the collected images were taken in different lighting, different places, and different facial expressions.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77547794","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}
The scarcity of water resources constitutes a real problem facing man on an ongoing basis, especially with the exacerbation of environmental degradation and drought that affected large parts of the globe. With the increase in the number of the earth's population, the world is in need of more water sources for various activities. The study of the importance of water harvesting in its economic and environmental advantages lies in the impact on increasing and improving the productivity of agricultural crops by providing additional water at a low cost using supplementary irrigation. Remote sensing and applications of informatics systems are used to detect the best sites for the application of rainstorm water collection methods. This study aims to produce a map of the optimal sites for water harvesting methods to benefit from the water at the site of its fall without waiting for it to reach the downstream in Jimen Basin. This site is characterized by the presence of geological formations that have an important role in the application of water harvesting such as solid formations that allow the construction of dams within the basin. The study analyzed a lot of data on air temperature, solar radiation, relative humidity, evaporation, and rainfall amount. The geological formations, natural plants, and types of soil were also studied. It was found that Jimen Basin is very suitable to be used as a water harvesting basin to develop the region around the basin which is semi-arid. In conclusion, the proposed lake can help provide the possibility of establishing a residential city and also be a promising tourist site.
{"title":"Natural Ingredients in the Jimen Basin Using Remote Sensing Technology","authors":"Mohammed Hazim Khalel, A. Hamza, Firas Khaled","doi":"10.23851/mjs.v34i2.1300","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1300","url":null,"abstract":"The scarcity of water resources constitutes a real problem facing man on an ongoing basis, especially with the exacerbation of environmental degradation and drought that affected large parts of the globe. With the increase in the number of the earth's population, the world is in need of more water sources for various activities. The study of the importance of water harvesting in its economic and environmental advantages lies in the impact on increasing and improving the productivity of agricultural crops by providing additional water at a low cost using supplementary irrigation. Remote sensing and applications of informatics systems are used to detect the best sites for the application of rainstorm water collection methods. This study aims to produce a map of the optimal sites for water harvesting methods to benefit from the water at the site of its fall without waiting for it to reach the downstream in Jimen Basin. This site is characterized by the presence of geological formations that have an important role in the application of water harvesting such as solid formations that allow the construction of dams within the basin. The study analyzed a lot of data on air temperature, solar radiation, relative humidity, evaporation, and rainfall amount. The geological formations, natural plants, and types of soil were also studied. It was found that Jimen Basin is very suitable to be used as a water harvesting basin to develop the region around the basin which is semi-arid. In conclusion, the proposed lake can help provide the possibility of establishing a residential city and also be a promising tourist site.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86904479","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}
Awder Aziz Ahmed, Meeran A. Omer, Salahaddin A. Ahmed
Changes in the wind speed of the Iraqi-Kurdistan region are associated with many types of teleconnection patterns. Daily wind speed datasets for eight meteorological stations in the Iraqi-Kurdistan region were gathered from Sulaymaniya, Penjwen, Hallabja, Kalar, Erbil, Sallahadin, Zakho, and Duhok weather stations. spectral comparability between the daily wind speed of the eight sites and prominent atmospheric indices was implemented for the North Atlantic Oscillation (NAO), Southern Oscillation (SO), Mediterranean Oscillation (MO), and Arctic Oscillation (AO), using the multi-taper method (MTM) for spectral analysis to find the source of the wind speed cycle of the cites for the study area. It was found that the common cycles for the eight stations are 2.22, 2.5, 3.33, 3.7, 4.35, 5.56, 7.14, 10, and 14.29 cycles. It is obvious that there are common cycles between each of the NAO, SO, MO, and AO indices and the cycles of daily wind speed of the eight stations. The results of this study will allow us to understand the relation between the regional daily wind speeds patterns fluctuations and the global teleconnection patterns and also to forecast the behavior of daily regional wind speed.
{"title":"The Role of Teleconnection Patterns on Wind Speed of Iraqi-Kurdistan Region","authors":"Awder Aziz Ahmed, Meeran A. Omer, Salahaddin A. Ahmed","doi":"10.23851/mjs.v34i2.1249","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1249","url":null,"abstract":"Changes in the wind speed of the Iraqi-Kurdistan region are associated with many types of teleconnection patterns. Daily wind speed datasets for eight meteorological stations in the Iraqi-Kurdistan region were gathered from Sulaymaniya, Penjwen, Hallabja, Kalar, Erbil, Sallahadin, Zakho, and Duhok weather stations. spectral comparability between the daily wind speed of the eight sites and prominent atmospheric indices was implemented for the North Atlantic Oscillation (NAO), Southern Oscillation (SO), Mediterranean Oscillation (MO), and Arctic Oscillation (AO), using the multi-taper method (MTM) for spectral analysis to find the source of the wind speed cycle of the cites for the study area. It was found that the common cycles for the eight stations are 2.22, 2.5, 3.33, 3.7, 4.35, 5.56, 7.14, 10, and 14.29 cycles. It is obvious that there are common cycles between each of the NAO, SO, MO, and AO indices and the cycles of daily wind speed of the eight stations. The results of this study will allow us to understand the relation between the regional daily wind speeds patterns fluctuations and the global teleconnection patterns and also to forecast the behavior of daily regional wind speed.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74289246","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}
What is meant by water harvesting is the process of collecting and storing surface runoff water resulting from precipitation to benefit from it for agricultural purposes, feeding underground storage, and providing drinking water for humans and animals. For the basin, especially evaporation, where the number of hours of the solar surface was recorded in two Kirkuk stations (11) hours/day, respectively, and it was recorded in Chamchamal station at about (12) hours/day, while it decreases during the winter months, as it reaches about (5) in Chamchamal station, respectively, while in Kirkuk station reached (6) hours/day, respectively. The highest monthly rates were recorded during the winter months (December) by (66.4, and 66.7%) for both stations (Chemchamal-Kirkuk), respectively. While its lowest monthly rates were recorded during the summer months (July and August), when it reached (24.2%), which can predict the presence of saturated soil, which reduces filtration and leakage after rain falls and generates surface runoff, which can be harvested and utilized from the water. For both stations, they are spatially and temporally dissimilar, as the highest average of their monthly totals was recorded during the winter seasons in Chamchamal station in January and February to (92.9 mm) respectively, then it decreased relatively during December as recorded (90.1 mm). The annual rainfall was recorded in both stations (Chemchamal-Kirkuk) (502.3, 337.7 mm). It is clear from the foregoing that the plant has an important role in the presence of organic matter in the soil, which increases the seepage of falling rainwater and does not generate surface runoff. Therefore, the areas that are characterized by the presence of vegetation can be exploited by applying the harvesting methods designated for such areas that are characterized by water leakage into the ground, and therefore the soil is radiant with moisture, which can be cultivated directly, especially by applying the technology of mountain terraces that works to impede water and increase its seepage into the soil layer, especially These areas are characterized by their height and exposure to soil erosion after heavy rains.
{"title":"Water Harvesting in the Jimin Basin by Using Remote Sensing Techniques and Geographical Information Systems","authors":"Mohammed Hazim Khalel, A. Hamza, Firas Khaled","doi":"10.23851/mjs.v34i2.1301","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1301","url":null,"abstract":"What is meant by water harvesting is the process of collecting and storing surface runoff water resulting from precipitation to benefit from it for agricultural purposes, feeding underground storage, and providing drinking water for humans and animals. For the basin, especially evaporation, where the number of hours of the solar surface was recorded in two Kirkuk stations (11) hours/day, respectively, and it was recorded in Chamchamal station at about (12) hours/day, while it decreases during the winter months, as it reaches about (5) in Chamchamal station, respectively, while in Kirkuk station reached (6) hours/day, respectively. The highest monthly rates were recorded during the winter months (December) by (66.4, and 66.7%) for both stations (Chemchamal-Kirkuk), respectively. While its lowest monthly rates were recorded during the summer months (July and August), when it reached (24.2%), which can predict the presence of saturated soil, which reduces filtration and leakage after rain falls and generates surface runoff, which can be harvested and utilized from the water. For both stations, they are spatially and temporally dissimilar, as the highest average of their monthly totals was recorded during the winter seasons in Chamchamal station in January and February to (92.9 mm) respectively, then it decreased relatively during December as recorded (90.1 mm). The annual rainfall was recorded in both stations (Chemchamal-Kirkuk) (502.3, 337.7 mm). It is clear from the foregoing that the plant has an important role in the presence of organic matter in the soil, which increases the seepage of falling rainwater and does not generate surface runoff. Therefore, the areas that are characterized by the presence of vegetation can be exploited by applying the harvesting methods designated for such areas that are characterized by water leakage into the ground, and therefore the soil is radiant with moisture, which can be cultivated directly, especially by applying the technology of mountain terraces that works to impede water and increase its seepage into the soil layer, especially These areas are characterized by their height and exposure to soil erosion after heavy rains.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81231339","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}
A. M. Ali, F. Ali, Sabah Manfi Redha, Nurideen Abubakari
In this paper, we designed a new efficient stream cipher cryptosystem that depends on a chaotic map to encrypt (decrypt) different types of digital images. The designed encryption system passed all basic efficiency criteria (like Randomness, MSE, PSNR, Histogram Analysis, and Key Space) that were applied to the key extracted from the random generator as well as to the digital images after completing the encryption process.
{"title":"Image Encryption Using New Non-Linear Stream Cipher Cryptosystem","authors":"A. M. Ali, F. Ali, Sabah Manfi Redha, Nurideen Abubakari","doi":"10.23851/mjs.v34i2.1294","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1294","url":null,"abstract":"In this paper, we designed a new efficient stream cipher cryptosystem that depends on a chaotic map to encrypt (decrypt) different types of digital images. The designed encryption system passed all basic efficiency criteria (like Randomness, MSE, PSNR, Histogram Analysis, and Key Space) that were applied to the key extracted from the random generator as well as to the digital images after completing the encryption process.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83524090","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}
Raza Abdulla, H. Faraj, Kazhan O. Mohammed, M. Younis
A heuristic evaluation model is proposed for assessing the usability of the Top 10 Iraq university websites. This model is based on 3 hierarchies of website usability criteria levels. The top hierarchy level consists of five website categories: design and layout, learnability, content, performance, and errors. In the middle hierarchy level 18 subcategories, and in the bottom hierarchy level 44 elements were described. The evaluation model utilized both automated tools and observation methods. To validate the results obtained by the proposed model, the selected universities were evaluated and scored according to the usability criteria of their websites. Besides the observation elements, the four automated tools (thinkwithgoogle, gtmetrix, tools. Pingdom, and webpagetest) were also used to assess the error and performance of the websites. The study showed that except for the University of Kufa and Baghdad University websites, the rest of the university websites failed to meet the applied website usability criteria levels of the proposed evaluation model.
{"title":"Usability Evaluation of the Top 10 Universities in Iraq Using Heuristic Methods","authors":"Raza Abdulla, H. Faraj, Kazhan O. Mohammed, M. Younis","doi":"10.23851/mjs.v34i2.1234","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1234","url":null,"abstract":"A heuristic evaluation model is proposed for assessing the usability of the Top 10 Iraq university websites. This model is based on 3 hierarchies of website usability criteria levels. The top hierarchy level consists of five website categories: design and layout, learnability, content, performance, and errors. In the middle hierarchy level 18 subcategories, and in the bottom hierarchy level 44 elements were described. The evaluation model utilized both automated tools and observation methods. To validate the results obtained by the proposed model, the selected universities were evaluated and scored according to the usability criteria of their websites. Besides the observation elements, the four automated tools (thinkwithgoogle, gtmetrix, tools. Pingdom, and webpagetest) were also used to assess the error and performance of the websites. The study showed that except for the University of Kufa and Baghdad University websites, the rest of the university websites failed to meet the applied website usability criteria levels of the proposed evaluation model.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74342549","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}
Jawaher Abdulelah Sadeq, A. R. A. Majeed, R. Hussain, Salim F. Bamsaoud
The current work focuses on the preparation of magnesium oxide nanoparticles using aqueous magnesium chloride salts and sodium hydroxide powder by a simple chemical precipitation method and at an annealing temperature of 700 °C for 6 hours. The structural and morphological properties of the magnesium oxide nanoparticles were investigated using X-ray diffraction (XRD). Polycrystalline cube and using the Scherer equation showed a crystalline size of 17.23 nm. EDS analyzes showed high purity. Scanning electron microscopy (FESEM) showed the spherical shape of the magnesium oxide particles. With particle size within the range (65-185) nm. While a (PMMA)-HAP nanocomposite was synthesized. -MgO) for use in dental applications such as fillings and dentures. A nanocomposite (PMMA-HAP-MgO) was manufactured by manual molding method by strengthening the poly methyl methacrylate polymer with certain weight ratios(1%,5%,and 10%) from a mixture of nano powder where the added ratios were (99%PMMA-1%HAP,95%PMMA-7.4%HAP-0.3%MgO,and 90%PMMA-9.4%HAP-0.3%MgO). The topographical properties (surface roughness) of the nanocomposite samples were studied by testing them with an atomic force microscope. The results showed an increase in the value of pure PMMA, where the use of nanoparticle filler by 5% (4.7% HAP -0.3% MgO) affected both the roughness and the root mean square ratio of the distribution of nanoparticles on the surface of the composite and the shape of the particles led to a roughness more than the polymer pure. The antibacterial activity of the polymeric overlay was examined on the bacteria that cause dental caries for (Streptococcus mutans), where the zone of inhibition were (1 mm, 2 mm, 5 mm) for the nanocomposite and no activity for pure PMMA.
本文主要研究了以氯化镁水溶液和氢氧化钠粉末为原料，在700℃退火6小时的条件下，采用简单的化学沉淀法制备氧化镁纳米颗粒。利用x射线衍射(XRD)研究了氧化镁纳米颗粒的结构和形貌。采用Scherer方程得到的多晶立方晶体尺寸为17.23 nm。EDS分析显示纯度高。扫描电镜(FESEM)显示氧化镁颗粒呈球形。粒径在(65-185)nm范围内。同时合成了(PMMA)-HAP纳米复合材料。-MgO)用于牙科应用，如填充物和假牙。以添加比例为99%PMMA-1%HAP、95%PMMA-7.4%HAP-0.3%MgO和90%PMMA-9.4%HAP-0.3%MgO的纳米粉体为原料，分别以一定的重量比(1%、5%和10%)对聚甲基丙烯酸甲酯聚合物进行强化，通过手工模塑法制备了PMMA-HAP-MgO纳米复合材料。利用原子力显微镜对纳米复合材料的形貌特性(表面粗糙度)进行了研究。结果表明，添加5%的纳米颗粒填料(4.7% HAP -0.3% MgO)会影响复合材料表面纳米颗粒分布的粗糙度和均方根比，并且颗粒的形状导致其粗糙度大于聚合物的纯度，从而提高了PMMA的纯度。聚合物覆盖层对引起龋齿的细菌(变形链球菌)的抗菌活性进行了检测，纳米复合材料的抑制区为(1 mm, 2 mm, 5 mm)，而对纯PMMA没有活性。
{"title":"Synthesis and Characterization of PMMA/HAP/MgO Nanocomposite as an Antibacterial Activity for Dental Applications","authors":"Jawaher Abdulelah Sadeq, A. R. A. Majeed, R. Hussain, Salim F. Bamsaoud","doi":"10.23851/mjs.v34i2.1330","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1330","url":null,"abstract":"The current work focuses on the preparation of magnesium oxide nanoparticles using aqueous magnesium chloride salts and sodium hydroxide powder by a simple chemical precipitation method and at an annealing temperature of 700 °C for 6 hours. The structural and morphological properties of the magnesium oxide nanoparticles were investigated using X-ray diffraction (XRD). Polycrystalline cube and using the Scherer equation showed a crystalline size of 17.23 nm. EDS analyzes showed high purity. Scanning electron microscopy (FESEM) showed the spherical shape of the magnesium oxide particles. With particle size within the range (65-185) nm. While a (PMMA)-HAP nanocomposite was synthesized. -MgO) for use in dental applications such as fillings and dentures. A nanocomposite (PMMA-HAP-MgO) was manufactured by manual molding method by strengthening the poly methyl methacrylate polymer with certain weight ratios(1%,5%,and 10%) from a mixture of nano powder where the added ratios were (99%PMMA-1%HAP,95%PMMA-7.4%HAP-0.3%MgO,and 90%PMMA-9.4%HAP-0.3%MgO). The topographical properties (surface roughness) of the nanocomposite samples were studied by testing them with an atomic force microscope. The results showed an increase in the value of pure PMMA, where the use of nanoparticle filler by 5% (4.7% HAP -0.3% MgO) affected both the roughness and the root mean square ratio of the distribution of nanoparticles on the surface of the composite and the shape of the particles led to a roughness more than the polymer pure. The antibacterial activity of the polymeric overlay was examined on the bacteria that cause dental caries for (Streptococcus mutans), where the zone of inhibition were (1 mm, 2 mm, 5 mm) for the nanocomposite and no activity for pure PMMA.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74735460","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}
Jawaher Abdulelah Sadeq, R. Hussain, A. M. Abdul Majeed
Polymer composite of heat cure acrylic (PMMA) matrix reinforced with different weight of nanoparticles Hydroxyapatite and Magnesium Oxide (1, 5 and 10% wt.) were prepared by hand molding technique. The Magnesium oxide nanoparticles were synthesized by Simple Chemical Method (Co-precipitation). The structure and morphology properties of MgO examined by X-ray diffraction (XRD), Field Emission Scanning electron microscopy (FESEM) and EDX. Lattice constant is a= 4.19
{"title":"Study the structural and mechanical properties of HAP-MgO NPs-PMMA nano-composite","authors":"Jawaher Abdulelah Sadeq, R. Hussain, A. M. Abdul Majeed","doi":"10.23851/mjs.v34i2.1288","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1288","url":null,"abstract":"Polymer composite of heat cure acrylic (PMMA) matrix reinforced with different weight of nanoparticles Hydroxyapatite and Magnesium Oxide (1, 5 and 10% wt.) were prepared by hand molding technique. The Magnesium oxide nanoparticles were synthesized by Simple Chemical Method (Co-precipitation). The structure and morphology properties of MgO examined by X-ray diffraction (XRD), Field Emission Scanning electron microscopy (FESEM) and EDX. Lattice constant is a= 4.19","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86170008","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}
Yasameen H. Rashid, J. A. Al-Hawasy, I. Chryssoverghi
In this paper, our purpose is to study the classical continuous constraints boundary optimal triple control vector problem dominating nonlinear triple parabolic boundary value problem. The existence theorem for a classical continuous triple optimal control vector CCCBOTCV is stated and proved under suitable assumptions. The mathematical formulation of the adjoint triple boundary value problem associated with the nonlinear triple parabolic boundary value problem is discovered. The Fréchet derivative of the Hamiltonian is derived. Under proper assumptions, both theorems are granted; the necessary conditions for optimality and the sufficient conditions for optimality of the classical continuous constraints boundary optimal triple control vector problem are stated and proven.
{"title":"Classical Continuous Constraint Boundary Optimal Control Vector Problem for Triple Nonlinear Parabolic System","authors":"Yasameen H. Rashid, J. A. Al-Hawasy, I. Chryssoverghi","doi":"10.23851/mjs.v34i2.1272","DOIUrl":"https://doi.org/10.23851/mjs.v34i2.1272","url":null,"abstract":"In this paper, our purpose is to study the classical continuous constraints boundary optimal triple control vector problem dominating nonlinear triple parabolic boundary value problem. The existence theorem for a classical continuous triple optimal control vector CCCBOTCV is stated and proved under suitable assumptions. The mathematical formulation of the adjoint triple boundary value problem associated with the nonlinear triple parabolic boundary value problem is discovered. The Fréchet derivative of the Hamiltonian is derived. Under proper assumptions, both theorems are granted; the necessary conditions for optimality and the sufficient conditions for optimality of the classical continuous constraints boundary optimal triple control vector problem are stated and proven.","PeriodicalId":7867,"journal":{"name":"Al-Mustansiriyah Journal of Science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91070535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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