Pub Date : 2022-01-10DOI: 10.55145/ajest.2022.01.01.002
Hussein K. Mejbel, Prof.Dr. Moafak Abdulrida
Theoretical values of in amorphous silicon quantum dots (1.8 – 12 nm)dielectric reduction have been calculated. These calculations presented that the dielectric constant of amorphous silicon quantum dots is suppressed. Also, it has been investigated the frequency dependence of the dielectric constant. The variation of the dielectric constant with frequency is similar to the variation of polarizability and polarization. The dielectric constant is made up of contributions from electronic, atomic, and space charge polarization. With the presented calculations, the effect of quantum confinement was adopted, since the bandgap of nano semiconductors can be governed by the size of amorphous silicon quantum dots.
{"title":"Dielectric Reduction of Nanometric Amorphous Silicon","authors":"Hussein K. Mejbel, Prof.Dr. Moafak Abdulrida","doi":"10.55145/ajest.2022.01.01.002","DOIUrl":"https://doi.org/10.55145/ajest.2022.01.01.002","url":null,"abstract":"Theoretical values of in amorphous silicon quantum dots (1.8 – 12 nm)dielectric reduction have been calculated. These calculations presented that the dielectric constant of amorphous silicon quantum dots is suppressed. Also, it has been investigated the frequency dependence of the dielectric constant. The variation of the dielectric constant with frequency is similar to the variation of polarizability and polarization. The dielectric constant is made up of contributions from electronic, atomic, and space charge polarization. With the presented calculations, the effect of quantum confinement was adopted, since the bandgap of nano semiconductors can be governed by the size of amorphous silicon quantum dots.","PeriodicalId":129949,"journal":{"name":"Al-Salam Journal for Engineering Science and Technology","volume":"194 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123656099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-10DOI: 10.55145/ajest.2022.01.01.003
Darwish Alsaadi, Vasilievich, Adnan
This work is improving the performance properties of greases additives graphene concentrate. It has been established that the addition of 1% graphene concentrate to the lubricant Solidol J contributes to an increase in its anti-wear properties by more than 30 percent. With the enrichment of commercial grease Lithol-24 with graphene concentrate, a decrease in the diameter of the spot of wear of the balls was determined at the plate size from 0.36 mm to 0.30 mm. As a result of testing lubricants in rolling bearings, a decrease in the heating temperature of bearings operating on lubricants enriched with graphene concentrate was found in comparison with commercial lubricants.
{"title":"IMPROVEMENT OF TRIBOLOGICAL PROPERTIES FOR LUBRICANTS BY ADDING GRAPHENE CONCENTRATE","authors":"Darwish Alsaadi, Vasilievich, Adnan","doi":"10.55145/ajest.2022.01.01.003","DOIUrl":"https://doi.org/10.55145/ajest.2022.01.01.003","url":null,"abstract":"This work is improving the performance properties of greases additives graphene concentrate. It has been established that the addition of 1% graphene concentrate to the lubricant Solidol J contributes to an increase in its anti-wear properties by more than 30 percent. With the enrichment of commercial grease Lithol-24 with graphene concentrate, a decrease in the diameter of the spot of wear of the balls was determined at the plate size from 0.36 mm to 0.30 mm. As a result of testing lubricants in rolling bearings, a decrease in the heating temperature of bearings operating on lubricants enriched with graphene concentrate was found in comparison with commercial lubricants.","PeriodicalId":129949,"journal":{"name":"Al-Salam Journal for Engineering Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129062784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-10DOI: 10.55145/ajest.2022.01.01.005
Rula A. Hamid, M. Croock
Filtering huge amounts of data is a very critical issue with the explosion of data over the web and cloud storage. A need to classify and sort these data is linked to that issue to facilitate data management and database building for various applications. Machine learning techniques are the most suitable to deal with such big data. One of the applications that can be implemented in machine learning is a tourist advising system that harvests data from tourism sites and aggregates different types of data about them (humidity, temperature, distance from user’s country, etc…) and classifies them. These data should be updated constantly, since the system provides real-time decision based on real-time data, where they are used later on by a bagging system to provide the user with suggested tourism sites with percentage to how suitable these sites according to the preferences submitted in addition to some other criteria.
{"title":"Developed High Scale Bagging Algorithm for E-Tourism Advising System","authors":"Rula A. Hamid, M. Croock","doi":"10.55145/ajest.2022.01.01.005","DOIUrl":"https://doi.org/10.55145/ajest.2022.01.01.005","url":null,"abstract":"Filtering huge amounts of data is a very critical issue with the explosion of data over the web and cloud storage. A need to classify and sort these data is linked to that issue to facilitate data management and database building for various applications. Machine learning techniques are the most suitable to deal with such big data.\u0000\u0000One of the applications that can be implemented in machine learning is a tourist advising system that harvests data from tourism sites and aggregates different types of data about them (humidity, temperature, distance from user’s country, etc…) and classifies them. These data should be updated constantly, since the system provides real-time decision based on real-time data, where they are used later on by a bagging system to provide the user with suggested tourism sites with percentage to how suitable these sites according to the preferences submitted in addition to some other criteria.","PeriodicalId":129949,"journal":{"name":"Al-Salam Journal for Engineering Science and Technology","volume":"846 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117087803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-10DOI: 10.55145/ajest.2022.01.01.004
Sura Mohammed Mubarak
This sheet research presents the implementation of Coded Orthogonal Frequency Division Multiplexing (COFDM) communication system encoded using Reed Solomon (RS) Coding implemented on TMS320C6713 platform. The collaboration of MATLAB integrated development environment (IDE) and Code Composer Studio (CCS) are adopted. The real time implementation is one of the most difficult issues of OFDM implementation. The problem of real time implementation is the memory consumption and the processing time. The other problem is Synchronization of OFDM receiver. Time and frequency synchronization to distinguish the begin of the OFDM symbol. The capability of RS for encoding the error correction ability makes it the most used error correction codes algorithm, so we use it with OFDM systems to combining them make the system has excellent performance potentiality in multipath and fading channels. The bit error rate and the number of error bits are calculated during each test on the system.
本文研究了在TMS320C6713平台上采用RS编码实现编码正交频分复用(COFDM)通信系统。采用MATLAB集成开发环境(IDE)和Code Composer Studio (CCS)的协同开发。实时实现是OFDM实现中最困难的问题之一。实时实现的问题是内存消耗和处理时间。另一个问题是OFDM接收机的同步。时间和频率同步区分开始的OFDM符号。RS编码的纠错能力使其成为最常用的纠错码算法，因此我们将其与OFDM系统相结合，使系统在多径信道和衰落信道中具有优异的性能潜力。在系统的每次测试中，计算误码率和误码数。
{"title":"Implementation of COFDM Reed Solomon using TMS320C6713","authors":"Sura Mohammed Mubarak","doi":"10.55145/ajest.2022.01.01.004","DOIUrl":"https://doi.org/10.55145/ajest.2022.01.01.004","url":null,"abstract":"This sheet research presents the implementation of Coded Orthogonal Frequency Division Multiplexing (COFDM) communication system encoded using Reed Solomon (RS) Coding implemented on TMS320C6713 platform. The collaboration of MATLAB integrated development environment (IDE) and Code Composer Studio (CCS) are adopted. The real time implementation is one of the most difficult issues of OFDM implementation. The problem of real time implementation is the memory consumption and the processing time. The other problem is Synchronization of OFDM receiver. Time and frequency synchronization to distinguish the begin of the OFDM symbol. The capability of RS for encoding the error correction ability makes it the most used error correction codes algorithm, so we use it with OFDM systems to combining them make the system has excellent performance potentiality in multipath and fading channels. The bit error rate and the number of error bits are calculated during each test on the system.","PeriodicalId":129949,"journal":{"name":"Al-Salam Journal for Engineering Science and Technology","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124108512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-10DOI: 10.55145/ajest.2022.01.01.001
Mustafa Jamal Jalal
{"title":"Analysis and modeling the electronic document management system of ministries of Iraq","authors":"Mustafa Jamal Jalal","doi":"10.55145/ajest.2022.01.01.001","DOIUrl":"https://doi.org/10.55145/ajest.2022.01.01.001","url":null,"abstract":"","PeriodicalId":129949,"journal":{"name":"Al-Salam Journal for Engineering Science and Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128079158","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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