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Computational analysis of aerosol dispersion trends from cement factory 水泥厂气溶胶扩散趋势的计算分析
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283768
M. Emetere, M. Akinyemi, U. .. Uno
{"title":"Computational analysis of aerosol dispersion trends from cement factory","authors":"M. Emetere, M. Akinyemi, U. .. Uno","doi":"10.1109/ICONSPACE.2015.7283768","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283768","url":null,"abstract":"Aerosol ejection from cement factory may be classified as forms of pollutions categorized simultaneously as point source or non-point source pollution. The aerosol particulates fall under gravity as it is transported by the mean wind, mild and erratic turbulence. A model was propounded via known and unknown parameters to offer a holistic analysis of dispersion and deposition of aerosol. The transport of the aerosol dispersion exhibited a three dimensional flow pattern which was solved and explained. A two dimensional and three dimensional dispersion semi-plume model of the mean concentration of diffusing pollutants were generated. The 3D diffusion equation revealed accurate determination of the field values of particulates deposited about the vicinity of the cement factory. Also, the mean concentration of diffusing pollutants emanating from the cement factory was directly proportional to the angular plume displacement. The 2D model illustrated the concept of mild diffusion region which was discovered to be the region of highest chemical transformation.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131302079","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}
引用次数: 17
Radiological assessment of natural radionuclide contents in soils from Omala, Kogi State, Nigeria 尼日利亚科吉州奥马拉土壤中天然放射性核素含量的放射学评估
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283780
M. Usikalu, A. Rabiu, O. Awe, J. Solomon, J. Achuka, K. Oyeyemi, F. Olawole
{"title":"Radiological assessment of natural radionuclide contents in soils from Omala, Kogi State, Nigeria","authors":"M. Usikalu, A. Rabiu, O. Awe, J. Solomon, J. Achuka, K. Oyeyemi, F. Olawole","doi":"10.1109/ICONSPACE.2015.7283780","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283780","url":null,"abstract":"High purity germanium detector (HPGe) was employed to assess radionuclide contents of 238U, 40K and 232Th in soils obtained from Omala, Kogi State, Nigeria. The activities measured vary from 9.0 to 82.2, 12.3 to 114.86 and below detector limit (BDL) and 349.0 Bq Kg-1 in 238U, 232Th and 40K respectively. Highest activities for the three radionuclides were consistently obtained from soil samples got from Igaliwu. The measured activities were engaged to estimate the absorbed dose, annual outdoor effective dose and gamma index. It was observed from the absorbed dose, annual equivalent dose and the gamma index estimated that soils from Igaliwu, Ijeke-ogene and Bagana were found to be higher than the recommended safe limit for normal background. This suggests that those living or using the soil for construction purposes are exposed to high radiation burden from natural radionuclides.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130495214","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}
引用次数: 4
Physical properties of NGC 3256 in radio and infrared domain NGC 3256在无线电和红外波段的物理性质
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283742
Israa Abdulqasim Mohammed Ali, Z. Abidin, Hwang Chorng-Yuan
{"title":"Physical properties of NGC 3256 in radio and infrared domain","authors":"Israa Abdulqasim Mohammed Ali, Z. Abidin, Hwang Chorng-Yuan","doi":"10.1109/ICONSPACE.2015.7283742","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283742","url":null,"abstract":"In this study, we have chosen the merger galaxy NGC 3256 to study the physical properties in the radio and Infrared domain. The former was taken from Atacama Large Millimeter/submillimeter Array (ALMA) in the CO (J=1-0) observations to estimate the central rotation velocity and total mass of the galaxy NGC 3256 within the synthesis beam size of 7.12\" × 4.9\" (or 1.2 kpc × 8.3 kpc) image. We found that our current spatial resolution has a central velocity of 135 km/s and its total mass is 5 × 109 M⊙ within a radius of 1.2 kpc. We made a comparison with the only previous similar study on this galaxy which focuses on radius of 10\" =1.7 kpc. We found good an agreement in terms of results for central rotation velocity and total mass. The Infrared data was taken from Spitzer archive at band 3.6 μm to study one of the physical features of galaxy formation, which is luminosity. The estimated luminosity of galaxy is an appropriate tool to understand the galaxy evolution and to estimate the stellar mass.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130988898","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}
引用次数: 0
A tropical model for analyzing radio refractivity: Selected locations in North Central, Nigeria 用于分析射电折射的热带模式:尼日利亚中北部选定地点
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283760
M. Emetere, O. A. Akinwumi, T. Omotosho, J. S. Mandeep
{"title":"A tropical model for analyzing radio refractivity: Selected locations in North Central, Nigeria","authors":"M. Emetere, O. A. Akinwumi, T. Omotosho, J. S. Mandeep","doi":"10.1109/ICONSPACE.2015.7283760","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283760","url":null,"abstract":"The effect of climatic global change has altered the meteorological factor of the ITU model especially in the lower atmosphere. The refractivity results obtained in an active tropical region of West Africa need to be reappraised. A model known as the Tropic model was derived and tested using NOAA data set. The data set were obtained from Meteorological data obtained from NOAA (USAF) Climatology center. Radiosonde data set was at least 39 years between 1973-2012 for six stations within the North-central of Nigeria. It was observed that the Tropic model detected tropospheric perturbations caused by the extensive influence of aerosol influx. This was confirmed by the hourly refractivity obtained from the ITU model. Hence, the ITU model and the Tropic model are complementary to each other for an accurate terrestrial radio links calculations.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134142162","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}
引用次数: 8
Circularly polarized patch antenna for S-band satellite applications s波段卫星用圆极化贴片天线
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283837
R. Azim, M. Samsuzzaman, T. Alam, M. Islam, M. Faruque, M. Zaman, M. Islam
{"title":"Circularly polarized patch antenna for S-band satellite applications","authors":"R. Azim, M. Samsuzzaman, T. Alam, M. Islam, M. Faruque, M. Zaman, M. Islam","doi":"10.1109/ICONSPACE.2015.7283837","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283837","url":null,"abstract":"In this paper, a circularly polarized antenna is proposed for satellite communication system. Commercially available Finite Integration Technique (FIT) based software Computer Simulation Technology (CST) microwave studio and finite element method solver based High Frequency Structural Simulator (HFSS) have been used in this analysis. The proposed antenna achieved 3dB axial ratio of 30 MHz with -10dB reflection coefficient. The axial ratio and reflection coefficient has been verified with both CST and HFSS simulation software. The operating frequency of the proposed antenna is 2.35 GHz. The antenna has been printed on FR-4 (lossy) Substrate material with relative Permittivity of 4.6 and thickness of 1.6 mm. The proposed antenna exhibits a 3 dB axial-ratio beam width of more than 1420.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133276588","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}
引用次数: 7
Comparison of digital elevation models based on high resolution satellite stereo imagery 基于高分辨率卫星立体影像的数字高程模型比较
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283789
A. Qayyum, A. Malik, Muhammad Naufal Bin muhammad Saad
{"title":"Comparison of digital elevation models based on high resolution satellite stereo imagery","authors":"A. Qayyum, A. Malik, Muhammad Naufal Bin muhammad Saad","doi":"10.1109/ICONSPACE.2015.7283789","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283789","url":null,"abstract":"In this paper, we analysed and compared the digital elevation model (DEM) based on high resolution QuickBird and Pleiades satellite stereo images. 3D maps were generated for objects like trees near poles of power transmission lines using satellite stereo images. This study was very challenging due to weather condition, hilly and non-uniform terrain at Kota kina balu in East Malaysia. First we require the geometric accuracy of these two sensors for 3D mapping of the area of interest. Also we require accurate Digital elevation model for better height calculation of vegetation/trees near power poles. For these purposes, we evaluated the accuracy of DEM using high resolution satellite stereo imagery. The comparison was made based on RPC coefficients and ground control point's measurement (GCP). Results shown that the Pleiades satellite sensor is feasible for generating the elevation model for small area. This shows that Pleiades sensor can be used for monitoring the vegetation near poles of high transmission power lines based on the satellite stereo images.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123927756","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}
引用次数: 2
MHD reconstruction of a magnetic cloud in the solar wind 太阳风中磁云的MHD重建
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283745
W. Teh, M. Abdullah
{"title":"MHD reconstruction of a magnetic cloud in the solar wind","authors":"W. Teh, M. Abdullah","doi":"10.1109/ICONSPACE.2015.7283745","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283745","url":null,"abstract":"We use for the first time the two-dimensional (2-D), magneto-hydrodynamic (MHD) reconstruction technique to examine a magnetic cloud structure in the solar wind. The MHD reconstruction technique is based upon the initial-value integration of the steady, 2-D, ideal MHD equations to generate the cross section of field and plasma of a structure seen by a spacecraft. On 15 May, 2005, a super-intense geomagnetic storm was triggered by a magnetic cloud, which was observed by the Advanced Composition Explorer (ACE) spacecraft in the solar wind at 1 AU. Here AU is the astronomical unit (~1.5 × 108 km). A size of ~0.20 AU (length) × ~0.15 AU (width) of a left-handed magnetic flux rope structure is reconstructed for the magnetic cloud. The axial orientation of the magnetic flux rope is directed to [-0.433, 0.744, 0.509] in Geocentric Solar Magnetospheric (GSM) coordinates system. The distance of the spacecraft from the center of the flux rope is ~0.05 AU. The maximum axial magnetic field of the flux rope is ~59 nT for which the axial current density is estimated of ~5 pA/m2.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"45 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116589386","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}
引用次数: 0
Comparing IRI and regional ionospheric model with ionosonde foF2 measurements in Pakistan 比较IRI和区域电离层模式与巴基斯坦电离层探测仪测量的of2
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283755
M. Talha, Ghulam Murtaza, M. A. Ameen
{"title":"Comparing IRI and regional ionospheric model with ionosonde foF2 measurements in Pakistan","authors":"M. Talha, Ghulam Murtaza, M. A. Ameen","doi":"10.1109/ICONSPACE.2015.7283755","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283755","url":null,"abstract":"Critical frequency of F2 layer acquired by three ionosonde stations, Karachi (KHI, 24.95°N, 67.13°E), Multan (MUL, 30.18°N, 71.48°E) & Islamabad (ISL, 33.75°N, 73.13°E), in Pakistan has been compared with foF2 obtained from global ionospheric model IRI-2012 and computed from regional ionospheric model using higher terms of Emperical Orthogonal Functions (EOFs) during summer (July). The data has been compared at different phases of solar epoches. The computational sets using higher number of terms of EOFs (L > 1) showed slight different deviations from observations with respect to the expansion of EOFs using least number of terms (L = 1). Both models revealed good to reasonable agreement with the observed values for Multan and Islamabad. However for Karachi, considerable deviations between the models and observations are noted at different solar epoches except deep solar minimum due to its location which lies within equatorial ionization anomaly region. In general, regional model gives better results compared to IRI for MUL and ISL whereas IRI worked better for Karachi. Thus further improvements in regional model are required to get promosing results especially for EIA region station.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130241736","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}
引用次数: 1
Preliminary study on the near equatorial magnetic field model and South Atlantic Anomaly 近赤道磁场模式与南大西洋异常的初步研究
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283743
Khairul Afifi Nasuddin, M. Abdullah, N. S. A. Hamid, A. Hasbi
{"title":"Preliminary study on the near equatorial magnetic field model and South Atlantic Anomaly","authors":"Khairul Afifi Nasuddin, M. Abdullah, N. S. A. Hamid, A. Hasbi","doi":"10.1109/ICONSPACE.2015.7283743","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283743","url":null,"abstract":"The geomagnetic field is generated inside its molten iron core as a result of a mixture of the electrical forces within the core, daily Earth's rotation, and its thermal movement. The purpose of the study is to build the model of the near equatorial magnetic field, studying the effect of South Atlantic Anomaly on the near equatorial satellites and analyzing the characterization of the geomagnetic field. The building of the model is important since it can provide a better result in a small area compare to a large area. In this research, 6 stations located near the equatorial region were selected. The stations chosen can be used in designing the model using spherical cap harmonic analysis. The result for this research is still preliminary stage. The model constructed will be tested, verified and validated. The well-verified model will be capable to predict the characteristic of the geomagnetic field and can be used to study the effect of South Atlantic anomaly on the near equatorial satellites.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125772255","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}
引用次数: 1
Omnidirectional dielectric resonator antenna for LTE femtocell base stations LTE飞蜂窝基站全向介质谐振器天线
2015 International Conference on Space Science and Communication (IconSpace) Pub Date : 2015-10-01 DOI: 10.1109/ICONSPACE.2015.7283842
Aymen Dheyaa Khaleel, Mohd Fais bin Mansor, N. Misran, M. Islam
{"title":"Omnidirectional dielectric resonator antenna for LTE femtocell base stations","authors":"Aymen Dheyaa Khaleel, Mohd Fais bin Mansor, N. Misran, M. Islam","doi":"10.1109/ICONSPACE.2015.7283842","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2015.7283842","url":null,"abstract":"An omnidirectional dielectric resonator antenna of cuboid shape is designed for LTE femtocell base station. The dielectric antenna resides above a FR4 substrate, and is fed by a coaxial probe at the center of the antenna. This proposed antenna is appropriate for Long term evolution (LTE) band 7 (2500-2570 MHz, 2620-2690 MHz) and LTE band 38 (2.57-2.62 GHz), the impedance bandwidth is 236 MHz. The cuboid dielectric resonator antenna is made of a ceramic compound with a high dielectric constant of 30. The optimized design of the antenna is obtained through extensive simulations using CST Microwave Studio.","PeriodicalId":150022,"journal":{"name":"2015 International Conference on Space Science and Communication (IconSpace)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126850397","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}
引用次数: 5
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