Background: Insufficiency of vitamin D is one of the utmost general health issues all over the globe, including Pakistan;incompatible data are present on the possible relationship among serum vitamin D values and qual...Background: Insufficiency of vitamin D is one of the utmost general health issues all over the globe, including Pakistan;incompatible data are present on the possible relationship among serum vitamin D values and quality of semen. Objective: Lack of Vitamin D in body is related with a higher risk of various health problems including infertility. In our setup no such type of study had been conducted in the past on the relationship among serum vitamin D levels and infertility. This study was aimed to investigate male subjects with infertility and serum levels of vitamin D. Methods: This study was cross-sectional and performed on 243 male subjects who attended the clinic for evaluation of infertility from January 2016 to December 2017. Mean age of patients was 31.94 years with standard deviation of 7.52 years. The mean age of controls was 32.2 years with SD 8.42 years, age ranged between 20 years as minimum to 46 years as maximum. The minimum vitamin D level was 7.00 ng/dl while maximum 130 ng/dl, mean was 26.20 and standard deviation was 22.06 ng/ml. Levels of vitamin D were significantly low in (67%) male subjects with infertility. The mean vitamin D level of controls was 49.40 with SD of 35.98 ng/ml. 28% of controls had also vitamin D levels below the normal range, which indicates the prevalence of vitamin D deficiency in general population here in our setup. The participants were divided according to WHO (World Health Organization) 2010 criteria along with corresponding healthy control subjects. A questionnaire for evaluation of infertility in male subjects was filled by all the contestants. Results: Levels of vitamin D were significantly low in (67%) male subjects with infertility. While 28% of controls had also vitamin D levels below the normal range. Infertile male subjects with low or no sperm count were found insufficient for vitamin D in comparison to healthy control subjects. Conclusion: It was concluded from the results of current study that low levels of vitamin D are related with abnormal male reproductive function, the severity of that was subject to the amount of vitamin D insufficiency.展开更多
The Power Quality (PQ), security, reliability etc., are the prime objectives of the power system. The protection is developed in such a way that it should be selective, fast, reliable and the cost effective. The study...The Power Quality (PQ), security, reliability etc., are the prime objectives of the power system. The protection is developed in such a way that it should be selective, fast, reliable and the cost effective. The study about the islanding protection in Low Voltage (LV) CIGRE distribution and networks like this has been proposed in this paper. This is achieved by developing the protection against the short circuit faults which might appear at the Medium Voltage (MV) bus. The protection of the network with significant penetration of the Distributed Generations (DGs) is a complicated process. The DG units which are directly connected to the grid such as synchronous or induction generators contribute large short power, whereas the DG units which are connected to the grid via inverters carry small amount of the short circuit power. This creates the problems in the protection of the network. If the proper protection coordination measures have not been taken, it might cause the mal-function of the protection devices which put the portion of the power network into the security threats. The selection of the islanding protection devices in this paper is made to protect the network against bi-directional currents at the time of short circuit fault. The LV CIGRE distribution network will enter into islanding if a fault is cleared at the MV bus by the proposed islanding protection devices. It is therefore, essential to detect the islanding in the CIGRE power network. The detection of the island in this network is another major objective of this paper. The detection of the island is proposed by using the technique which is based on the voltage phase angle difference. The simulations are carried out by using DIgSILENT power factory software version 15.0.展开更多
文摘Background: Insufficiency of vitamin D is one of the utmost general health issues all over the globe, including Pakistan;incompatible data are present on the possible relationship among serum vitamin D values and quality of semen. Objective: Lack of Vitamin D in body is related with a higher risk of various health problems including infertility. In our setup no such type of study had been conducted in the past on the relationship among serum vitamin D levels and infertility. This study was aimed to investigate male subjects with infertility and serum levels of vitamin D. Methods: This study was cross-sectional and performed on 243 male subjects who attended the clinic for evaluation of infertility from January 2016 to December 2017. Mean age of patients was 31.94 years with standard deviation of 7.52 years. The mean age of controls was 32.2 years with SD 8.42 years, age ranged between 20 years as minimum to 46 years as maximum. The minimum vitamin D level was 7.00 ng/dl while maximum 130 ng/dl, mean was 26.20 and standard deviation was 22.06 ng/ml. Levels of vitamin D were significantly low in (67%) male subjects with infertility. The mean vitamin D level of controls was 49.40 with SD of 35.98 ng/ml. 28% of controls had also vitamin D levels below the normal range, which indicates the prevalence of vitamin D deficiency in general population here in our setup. The participants were divided according to WHO (World Health Organization) 2010 criteria along with corresponding healthy control subjects. A questionnaire for evaluation of infertility in male subjects was filled by all the contestants. Results: Levels of vitamin D were significantly low in (67%) male subjects with infertility. While 28% of controls had also vitamin D levels below the normal range. Infertile male subjects with low or no sperm count were found insufficient for vitamin D in comparison to healthy control subjects. Conclusion: It was concluded from the results of current study that low levels of vitamin D are related with abnormal male reproductive function, the severity of that was subject to the amount of vitamin D insufficiency.
文摘The Power Quality (PQ), security, reliability etc., are the prime objectives of the power system. The protection is developed in such a way that it should be selective, fast, reliable and the cost effective. The study about the islanding protection in Low Voltage (LV) CIGRE distribution and networks like this has been proposed in this paper. This is achieved by developing the protection against the short circuit faults which might appear at the Medium Voltage (MV) bus. The protection of the network with significant penetration of the Distributed Generations (DGs) is a complicated process. The DG units which are directly connected to the grid such as synchronous or induction generators contribute large short power, whereas the DG units which are connected to the grid via inverters carry small amount of the short circuit power. This creates the problems in the protection of the network. If the proper protection coordination measures have not been taken, it might cause the mal-function of the protection devices which put the portion of the power network into the security threats. The selection of the islanding protection devices in this paper is made to protect the network against bi-directional currents at the time of short circuit fault. The LV CIGRE distribution network will enter into islanding if a fault is cleared at the MV bus by the proposed islanding protection devices. It is therefore, essential to detect the islanding in the CIGRE power network. The detection of the island in this network is another major objective of this paper. The detection of the island is proposed by using the technique which is based on the voltage phase angle difference. The simulations are carried out by using DIgSILENT power factory software version 15.0.
