International Journal of Electrical and Computer Engineering (IJECE), 2019
Vehicular Ad Hoc Networks (VANETs) have been developed to improve the safety, comfort and efficie... more Vehicular Ad Hoc Networks (VANETs) have been developed to improve the safety, comfort and efficiency of driving on the road. The IEEE 1609.4 is a standard intended to support multi-channel in VANETs. These channels include one control channel for safety applications and six service channels for service applications. However, there is still no comprehensive analysis for the average delay and system throughput of IEEE 1609.4 MAC in VANETs considering error-prone channel under non-saturated conditions. In this paper, we propose an analytical models based on 1-D and 2-D Markov chain to evaluate the performance analysis of IEEE 1609.4 MAC in the presence of error-prone channels. Besides, freezing of the back-off timer is taken into consideration to provide an accurate estimation of access to the channel. The simulation results have been carried out to validate the analytical results of our model. The results show that the performance of our model outperforms the existing model in terms o...
This study aimed to determine the prevalence of Thyroid-Stimulating Hormone (TSH) alterations and... more This study aimed to determine the prevalence of Thyroid-Stimulating Hormone (TSH) alterations and different types of thyroid dysfunctions in both sexes with no age limitations from variety of sources in Duhok province. In this retrospective cross-sectional study, we screened 25040 suspicious cases of thyroid diseases in a year (2019), retrieving the data from the computers of three clinical laboratories of Duhok City. Following exclusion of 470 cases, 24568 cases were included to categorize the different types of thyroid dysfunctions. The prevalence of TSH alteration was 25.03%, 20.55% of them had a high concentration being statistically higher in females, while only 4.48% was low TSH with equal prevalence among both sexes. Out of 24568 patients, the prevalence of subclinical hypothyroidism was 94.85%, followed by 2.20%, 1.20%, 0.78%, 0.67%, and 0.31% for each of subclinical hyperthyroidism, primary hypothyroidism, central hyperthyroidism, central hypothyroidism, and primary hyperth...
International Journal of Electrical and Computer Engineering (IJECE), 2019
Vehicular Ad Hoc Networks (VANETs) have been developed to improve the safety, comfort and efficie... more Vehicular Ad Hoc Networks (VANETs) have been developed to improve the safety, comfort and efficiency of driving on the road. The IEEE 1609.4 is a standard intended to support multi-channel in VANETs. These channels include one control channel for safety applications and six service channels for service applications. However, there is still no comprehensive analysis for the average delay and system throughput of IEEE 1609.4 MAC in VANETs considering error-prone channel under non-saturated conditions. In this paper, we propose an analytical models based on 1-D and 2-D Markov chain to evaluate the performance analysis of IEEE 1609.4 MAC in the presence of error-prone channels. Besides, freezing of the back-off timer is taken into consideration to provide an accurate estimation of access to the channel. The simulation results have been carried out to validate the analytical results of our model. The results show that the performance of our model outperforms the existing model in terms o...
This study aimed to determine the prevalence of Thyroid-Stimulating Hormone (TSH) alterations and... more This study aimed to determine the prevalence of Thyroid-Stimulating Hormone (TSH) alterations and different types of thyroid dysfunctions in both sexes with no age limitations from variety of sources in Duhok province. In this retrospective cross-sectional study, we screened 25040 suspicious cases of thyroid diseases in a year (2019), retrieving the data from the computers of three clinical laboratories of Duhok City. Following exclusion of 470 cases, 24568 cases were included to categorize the different types of thyroid dysfunctions. The prevalence of TSH alteration was 25.03%, 20.55% of them had a high concentration being statistically higher in females, while only 4.48% was low TSH with equal prevalence among both sexes. Out of 24568 patients, the prevalence of subclinical hypothyroidism was 94.85%, followed by 2.20%, 1.20%, 0.78%, 0.67%, and 0.31% for each of subclinical hyperthyroidism, primary hypothyroidism, central hyperthyroidism, central hypothyroidism, and primary hyperth...
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Papers by Saeed Sabri