際際滷shows by User: HussainMajid / http://www.slideshare.net/images/logo.gif 際際滷shows by User: HussainMajid / Tue, 22 May 2012 23:06:50 GMT 際際滷Share feed for 際際滷shows by User: HussainMajid Implementation of Charged Particles Deposition in Stochastic Lung Model and Calculation of Enhanced Deposition /slideshow/implementation-of-charged-particles-deposition-in-stochastic-lung-model-and-calculation-of-enhanced-deposition/13037671 modellingchargedparticledeposition-120522230651-phpapp02
Freshly generated aerosols in workplace atmosphere may have charges well above the Boltzmann equilibrium (Forsyth et al. 1998). Similarly, aerosols produced by commercial metered dose inhalers can produce elementary charges up to several ten thousands (Kwok et al. 2005). In-vivo and in-vitro experiments have shown enhanced deposition in the lung due to electro-statically charged particles. Enhanced deposition due to charged particles in the lung is mainly caused by the image charge force (Yu, 1985). Several models have been developed to predict the effect of charged particles deposition in the lung with good agreement with the experimental data (Melandri et al. 1983; Yu 1985; Hashish et al. 1994). In the present study, enhanced deposition in the human lung due to charged particles has been estimated using the stochastic airway generation model IDEAL.]]>
Freshly generated aerosols in workplace atmosphere may have charges well above the Boltzmann equilibrium (Forsyth et al. 1998). Similarly, aerosols produced by commercial metered dose inhalers can produce elementary charges up to several ten thousands (Kwok et al. 2005). In-vivo and in-vitro experiments have shown enhanced deposition in the lung due to electro-statically charged particles. Enhanced deposition due to charged particles in the lung is mainly caused by the image charge force (Yu, 1985). Several models have been developed to predict the effect of charged particles deposition in the lung with good agreement with the experimental data (Melandri et al. 1983; Yu 1985; Hashish et al. 1994). In the present study, enhanced deposition in the human lung due to charged particles has been estimated using the stochastic airway generation model IDEAL.]]> Tue, 22 May 2012 23:06:50 GMT /slideshow/implementation-of-charged-particles-deposition-in-stochastic-lung-model-and-calculation-of-enhanced-deposition/13037671 HussainMajid@slideshare.net(HussainMajid) Implementation of Charged Particles Deposition in Stochastic Lung Model and Calculation of Enhanced Deposition HussainMajid Freshly generated aerosols in workplace atmosphere may have charges well above the Boltzmann equilibrium (Forsyth et al. 1998). Similarly, aerosols produced by commercial metered dose inhalers can produce elementary charges up to several ten thousands (Kwok et al. 2005). In-vivo and in-vitro experiments have shown enhanced deposition in the lung due to electro-statically charged particles. Enhanced deposition due to charged particles in the lung is mainly caused by the image charge force (Yu, 1985). Several models have been developed to predict the effect of charged particles deposition in the lung with good agreement with the experimental data (Melandri et al. 1983; Yu 1985; Hashish et al. 1994). In the present study, enhanced deposition in the human lung due to charged particles has been estimated using the stochastic airway generation model IDEAL. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/modellingchargedparticledeposition-120522230651-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Freshly generated aerosols in workplace atmosphere may have charges well above the Boltzmann equilibrium (Forsyth et al. 1998). Similarly, aerosols produced by commercial metered dose inhalers can produce elementary charges up to several ten thousands (Kwok et al. 2005). In-vivo and in-vitro experiments have shown enhanced deposition in the lung due to electro-statically charged particles. Enhanced deposition due to charged particles in the lung is mainly caused by the image charge force (Yu, 1985). Several models have been developed to predict the effect of charged particles deposition in the lung with good agreement with the experimental data (Melandri et al. 1983; Yu 1985; Hashish et al. 1994). In the present study, enhanced deposition in the human lung due to charged particles has been estimated using the stochastic airway generation model IDEAL.
Implementation of Charged Particles Deposition in Stochastic Lung Model and Calculation of Enhanced Deposition from Hussain Majid
]]> 2533 4 https://cdn.slidesharecdn.com/ss_thumbnails/modellingchargedparticledeposition-120522230651-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Computational Model for Deposition, Clearance and Dosimetry of Inhaled Aerosols and Radionuclides in the Human Lung /HussainMajid/computational-model-for-deposition-clearance-and-dosimetry-of-inhaled-aerosols-and-radionuclides-in-the-human-lung compmodelfordepandclearanddos-110928104619-phpapp02
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]]> Wed, 28 Sep 2011 10:46:17 GMT /HussainMajid/computational-model-for-deposition-clearance-and-dosimetry-of-inhaled-aerosols-and-radionuclides-in-the-human-lung HussainMajid@slideshare.net(HussainMajid) Computational Model for Deposition, Clearance and Dosimetry of Inhaled Aerosols and Radionuclides in the Human Lung HussainMajid <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/compmodelfordepandclearanddos-110928104619-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Computational Model for Deposition, Clearance and Dosimetry of Inhaled Aerosols and Radionuclides in the Human Lung from Hussain Majid
]]> 2453 2 https://cdn.slidesharecdn.com/ss_thumbnails/compmodelfordepandclearanddos-110928104619-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Atmospheric Dispersion in Nuclear Power Plant Siting /slideshow/atmospheric-dispersion-in-nuclear-power-plant-siting/9376367 dispersion-110922082222-phpapp02
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]]> Thu, 22 Sep 2011 08:22:20 GMT /slideshow/atmospheric-dispersion-in-nuclear-power-plant-siting/9376367 HussainMajid@slideshare.net(HussainMajid) Atmospheric Dispersion in Nuclear Power Plant Siting HussainMajid <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/dispersion-110922082222-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Atmospheric Dispersion in Nuclear Power Plant Siting from Hussain Majid
]]> 1653 1 https://cdn.slidesharecdn.com/ss_thumbnails/dispersion-110922082222-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 USES OF NUCLEAR ENERGY /slideshow/uses-of-nuclear-energy/9376231 usesofnucenergy-110922081452-phpapp01
Generally it is believed that nuclear energy is used for destructive purposes only. But, in fact it has more positive uses than its negative uses. Basically atom is the source of nuclear energy. This energy is released by splitting of a nuclei in to two.]]>
Generally it is believed that nuclear energy is used for destructive purposes only. But, in fact it has more positive uses than its negative uses. Basically atom is the source of nuclear energy. This energy is released by splitting of a nuclei in to two.]]> Thu, 22 Sep 2011 08:14:49 GMT /slideshow/uses-of-nuclear-energy/9376231 HussainMajid@slideshare.net(HussainMajid) USES OF NUCLEAR ENERGY HussainMajid Generally it is believed that nuclear energy is used for destructive purposes only. But, in fact it has more positive uses than its negative uses. Basically atom is the source of nuclear energy. This energy is released by splitting of a nuclei in to two. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/usesofnucenergy-110922081452-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Generally it is believed that nuclear energy is used for destructive purposes only. But, in fact it has more positive uses than its negative uses. Basically atom is the source of nuclear energy. This energy is released by splitting of a nuclei in to two.
USES OF NUCLEAR ENERGY from Hussain Majid
]]> 40059 9 https://cdn.slidesharecdn.com/ss_thumbnails/usesofnucenergy-110922081452-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 ARC VIEW GEOGRAPHICAL INFORMATION SYSTEM (GIS) /slideshow/arc-view-geographical-information-system-gis/9376084 gispre-110922080408-phpapp01
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]]> Thu, 22 Sep 2011 08:04:05 GMT /slideshow/arc-view-geographical-information-system-gis/9376084 HussainMajid@slideshare.net(HussainMajid) ARC VIEW GEOGRAPHICAL INFORMATION SYSTEM (GIS) HussainMajid <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/gispre-110922080408-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
ARC VIEW GEOGRAPHICAL INFORMATION SYSTEM (GIS) from Hussain Majid
]]> 2306 3 https://cdn.slidesharecdn.com/ss_thumbnails/gispre-110922080408-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Aerosol size distribution, mass concentration measurement and lung deposition calculations for metropolitan cities of Pakistan /slideshow/aerosol-size-distribution-mass-concentration-measurement-and-lung-deposition-calculations-for-metropolitan-cities-of-pakistan/9376011 particlemassconcinpak-110922075733-phpapp01
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]]> Thu, 22 Sep 2011 07:57:32 GMT /slideshow/aerosol-size-distribution-mass-concentration-measurement-and-lung-deposition-calculations-for-metropolitan-cities-of-pakistan/9376011 HussainMajid@slideshare.net(HussainMajid) Aerosol size distribution, mass concentration measurement and lung deposition calculations for metropolitan cities of Pakistan HussainMajid <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/particlemassconcinpak-110922075733-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Aerosol size distribution, mass concentration measurement and lung deposition calculations for metropolitan cities of Pakistan from Hussain Majid
]]> 1980 1 https://cdn.slidesharecdn.com/ss_thumbnails/particlemassconcinpak-110922075733-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Effect of intersubject variability of extrathoracic airways on particle deposition /slideshow/effect-of-intersubject-variability-of-extrathoracic-airways-on-particle-deposition/9375931 effectofintersubjectvaronparticledep-110922075258-phpapp01
The ET (nasal and oral) airways are the first route and serve as a filter for the inhaled particles. The ET airways are the important determinant of doses delivered by inhaled particles to the lung. Since the structure of the ET airway geometry exhibit significant intersubject variations, it affects both extrathoracic deposition and in further consequence, the fraction of inhaled particles reaching the lung. The current study is focused on the effect of inter-subject variability of ET airways on particle deposition. ]]>
The ET (nasal and oral) airways are the first route and serve as a filter for the inhaled particles. The ET airways are the important determinant of doses delivered by inhaled particles to the lung. Since the structure of the ET airway geometry exhibit significant intersubject variations, it affects both extrathoracic deposition and in further consequence, the fraction of inhaled particles reaching the lung. The current study is focused on the effect of inter-subject variability of ET airways on particle deposition. ]]> Thu, 22 Sep 2011 07:52:55 GMT /slideshow/effect-of-intersubject-variability-of-extrathoracic-airways-on-particle-deposition/9375931 HussainMajid@slideshare.net(HussainMajid) Effect of intersubject variability of extrathoracic airways on particle deposition HussainMajid The ET (nasal and oral) airways are the first route and serve as a filter for the inhaled particles. The ET airways are the important determinant of doses delivered by inhaled particles to the lung. Since the structure of the ET airway geometry exhibit significant intersubject variations, it affects both extrathoracic deposition and in further consequence, the fraction of inhaled particles reaching the lung. The current study is focused on the effect of inter-subject variability of ET airways on particle deposition. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/effectofintersubjectvaronparticledep-110922075258-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The ET (nasal and oral) airways are the first route and serve as a filter for the inhaled particles. The ET airways are the important determinant of doses delivered by inhaled particles to the lung. Since the structure of the ET airway geometry exhibit significant intersubject variations, it affects both extrathoracic deposition and in further consequence, the fraction of inhaled particles reaching the lung. The current study is focused on the effect of inter-subject variability of ET airways on particle deposition.
Effect of intersubject variability of extrathoracic airways on particle deposition from Hussain Majid
]]> 690 3 https://cdn.slidesharecdn.com/ss_thumbnails/effectofintersubjectvaronparticledep-110922075258-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Respiratory deposition modelling /slideshow/respiratory-deposition-modelling/9373086 repiratorydepositionandmodeling-110922045219-phpapp01
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]]> Thu, 22 Sep 2011 04:52:17 GMT /slideshow/respiratory-deposition-modelling/9373086 HussainMajid@slideshare.net(HussainMajid) Respiratory deposition modelling HussainMajid <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/repiratorydepositionandmodeling-110922045219-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Respiratory deposition modelling from Hussain Majid
]]> 7409 16 https://cdn.slidesharecdn.com/ss_thumbnails/repiratorydepositionandmodeling-110922045219-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Lung dosimetry for inhaled long-lived radionuclides and radon progeny /slideshow/lung-dosimetry-for-inhaled-longlived-radionuclides-and-radon-progeny/9373063 llr-salzburg-110922044935-phpapp01
Stochastic lung dosimetry model IDEAL-DOSE considers deposition in the whole bronchial and alveolar airway system, while clearance was restricted to bronchial airways. For inhaled long-lived radionuclides, alveolar clearance has also to be considered for the calculations of alveolar as well as the bronchial doses from subsequently cleared particles to the bronchial region. The ICRP task group on internal dosimetry is developing new Occupational Intake of Radionuclide (OIR) and in connection to OIR Human Respiratory Tract Model (HRTM) will be updated on the basis of new information and experience. The main consideration for updating the HRTM are two clearance mechanisms including: particle transport blood absorption from different regions of the lung Proposed particle transport rates for updating clearance model is incoporated in IDAEL-DOSE for estimating lung doses from LLR.]]>
Stochastic lung dosimetry model IDEAL-DOSE considers deposition in the whole bronchial and alveolar airway system, while clearance was restricted to bronchial airways. For inhaled long-lived radionuclides, alveolar clearance has also to be considered for the calculations of alveolar as well as the bronchial doses from subsequently cleared particles to the bronchial region. The ICRP task group on internal dosimetry is developing new Occupational Intake of Radionuclide (OIR) and in connection to OIR Human Respiratory Tract Model (HRTM) will be updated on the basis of new information and experience. The main consideration for updating the HRTM are two clearance mechanisms including: particle transport blood absorption from different regions of the lung Proposed particle transport rates for updating clearance model is incoporated in IDAEL-DOSE for estimating lung doses from LLR.]]> Thu, 22 Sep 2011 04:49:33 GMT /slideshow/lung-dosimetry-for-inhaled-longlived-radionuclides-and-radon-progeny/9373063 HussainMajid@slideshare.net(HussainMajid) Lung dosimetry for inhaled long-lived radionuclides and radon progeny HussainMajid Stochastic lung dosimetry model IDEAL-DOSE considers deposition in the whole bronchial and alveolar airway system, while clearance was restricted to bronchial airways. For inhaled long-lived radionuclides, alveolar clearance has also to be considered for the calculations of alveolar as well as the bronchial doses from subsequently cleared particles to the bronchial region. The ICRP task group on internal dosimetry is developing new Occupational Intake of Radionuclide (OIR) and in connection to OIR Human Respiratory Tract Model (HRTM) will be updated on the basis of new information and experience. The main consideration for updating the HRTM are two clearance mechanisms including: particle transport blood absorption from different regions of the lung Proposed particle transport rates for updating clearance model is incoporated in IDAEL-DOSE for estimating lung doses from LLR. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/llr-salzburg-110922044935-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Stochastic lung dosimetry model IDEAL-DOSE considers deposition in the whole bronchial and alveolar airway system, while clearance was restricted to bronchial airways. For inhaled long-lived radionuclides, alveolar clearance has also to be considered for the calculations of alveolar as well as the bronchial doses from subsequently cleared particles to the bronchial region. The ICRP task group on internal dosimetry is developing new Occupational Intake of Radionuclide (OIR) and in connection to OIR Human Respiratory Tract Model (HRTM) will be updated on the basis of new information and experience. The main consideration for updating the HRTM are two clearance mechanisms including: particle transport blood absorption from different regions of the lung Proposed particle transport rates for updating clearance model is incoporated in IDAEL-DOSE for estimating lung doses from LLR.
Lung dosimetry for inhaled long-lived radionuclides and radon progeny from Hussain Majid
]]> 972 1 https://cdn.slidesharecdn.com/ss_thumbnails/llr-salzburg-110922044935-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Measurement of aerosol size distribution, PM concentration and lung deposition calculation at different cities of Pakistan /slideshow/measurement-of-aerosol-size-distribution-pm-concentration-and-lung-deposition-calculation-at-different-cities-of-pakistan/9373034 aerosolpresentation-110922044537-phpapp02
Pollution can be defined as an undesirable change in the physical, chemical or biological characteristics of the air, water or land that can affect health, survival or activities of humans or other organisms. Air pollution is a serious problem in many developing countries especially for those in the process of rapid industrialization, urbanization with increasing populations. Air pollution is a serious problem in Karachi, Lahore, Rawalpindi and Peshawar and many other cities of Pakistan, which are usually characterized with high ambient concentrations of particulate pollutants. Regular monitoring of ambient air quality is still not systematic in Pakistan. All the available information is based on random and short-term sampling conducted to assess the concentrations of various pollutants. ]]>
Pollution can be defined as an undesirable change in the physical, chemical or biological characteristics of the air, water or land that can affect health, survival or activities of humans or other organisms. Air pollution is a serious problem in many developing countries especially for those in the process of rapid industrialization, urbanization with increasing populations. Air pollution is a serious problem in Karachi, Lahore, Rawalpindi and Peshawar and many other cities of Pakistan, which are usually characterized with high ambient concentrations of particulate pollutants. Regular monitoring of ambient air quality is still not systematic in Pakistan. All the available information is based on random and short-term sampling conducted to assess the concentrations of various pollutants. ]]> Thu, 22 Sep 2011 04:45:36 GMT /slideshow/measurement-of-aerosol-size-distribution-pm-concentration-and-lung-deposition-calculation-at-different-cities-of-pakistan/9373034 HussainMajid@slideshare.net(HussainMajid) Measurement of aerosol size distribution, PM concentration and lung deposition calculation at different cities of Pakistan HussainMajid Pollution can be defined as an undesirable change in the physical, chemical or biological characteristics of the air, water or land that can affect health, survival or activities of humans or other organisms. Air pollution is a serious problem in many developing countries especially for those in the process of rapid industrialization, urbanization with increasing populations. Air pollution is a serious problem in Karachi, Lahore, Rawalpindi and Peshawar and many other cities of Pakistan, which are usually characterized with high ambient concentrations of particulate pollutants. Regular monitoring of ambient air quality is still not systematic in Pakistan. All the available information is based on random and short-term sampling conducted to assess the concentrations of various pollutants. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/aerosolpresentation-110922044537-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Pollution can be defined as an undesirable change in the physical, chemical or biological characteristics of the air, water or land that can affect health, survival or activities of humans or other organisms. Air pollution is a serious problem in many developing countries especially for those in the process of rapid industrialization, urbanization with increasing populations. Air pollution is a serious problem in Karachi, Lahore, Rawalpindi and Peshawar and many other cities of Pakistan, which are usually characterized with high ambient concentrations of particulate pollutants. Regular monitoring of ambient air quality is still not systematic in Pakistan. All the available information is based on random and short-term sampling conducted to assess the concentrations of various pollutants.
Measurement of aerosol size distribution, PM concentration and lung deposition calculation at different cities of Pakistan from Hussain Majid
]]> 4601 7 https://cdn.slidesharecdn.com/ss_thumbnails/aerosolpresentation-110922044537-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://cdn.slidesharecdn.com/profile-photo-HussainMajid-48x48.jpg?cb=1523148961 https://cdn.slidesharecdn.com/ss_thumbnails/modellingchargedparticledeposition-120522230651-phpapp02-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/implementation-of-charged-particles-deposition-in-stochastic-lung-model-and-calculation-of-enhanced-deposition/13037671 Implementation of Char... https://cdn.slidesharecdn.com/ss_thumbnails/compmodelfordepandclearanddos-110928104619-phpapp02-thumbnail.jpg?width=320&height=320&fit=bounds HussainMajid/computational-model-for-deposition-clearance-and-dosimetry-of-inhaled-aerosols-and-radionuclides-in-the-human-lung Computational Model fo... https://cdn.slidesharecdn.com/ss_thumbnails/dispersion-110922082222-phpapp02-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/atmospheric-dispersion-in-nuclear-power-plant-siting/9376367 Atmospheric Dispersion...