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Background Long-term high level of mental tension induced by nursing work may be associated with increased blood pressure in nurses. The factors influencing hypertension may differ by sex, since there are sex-specific differences in the regulation of blood pressure in molecules, cells and tissues. So exploring influencing factors for hypertension in male and female nurses is significant for formulating targeted prevention and control strategies. Objective To examine the prevalence and influencing factors of hypertension among male and female nurses in Hebei Province, providing a basis for developing sex-based hypertension prevention and control measures for nurses. Methods A census survey method was used. The prevalence and influencing factors of hypertension were investigated among 128 009 nurses in all hospitals in 11 cities of Hebei Province from November 2016 to July 2018. The recognized factors influencing hypertension were matched between male and female nurses by propensity score matching. Based on the matched data, multivariate Logistic regression was used to explore the factors influencing hypertension among male and female nurses. Results The prevalence of hypertension was higher in male nurses than in female nurses〔20.36% (1 115/5 476) vs 6.26% (669/122 533) , P25-35 years old (OR=2.182) , >35-45 years old (OR=3.560) , >45-55 years old (OR=7.406) , >55-65 years old (OR=13.339) 〕, BMI〔24.0-0-5 years (OR=3.399) , >5-10 years (OR=4.451) 〕, family history of hypertension (OR=1.225) were influencing factors of hypertension for male nurses (P25-35 years old (OR=1.382) , >35-45 years old (OR=4.125) , >45-55 years old (OR=6.510) , >55-65 years old (OR=5.616) 〕, BMI〔24.0-0-5 years (OR=2.863) , >5-10 years (OR=3.713) 〕, years of diabetes〔>0-5 years (OR=3.126) , >5-10 years (OR=2.947) , >10 years (OR=9.743) 〕, family history of hypertension (OR=1.243) , menstrual condition〔irregular (OR=1.358) , menopause (OR=1.689) 〕, pregnancy hypertension〔no (OR=0.486) , no history of pregnancy (OR=0.507) 〕were influencing factors of hypertension for female nurses (P

In this paper, a W-band traveling-wave tube (TWT) is proposed by combining the slotted sine waveguide (SSWG) slow-wave structure (SWS) with the cylindrical electron beam. The dispersion properties and interaction impedances of the SSWG SWS are analyzed by using the numerical simulation and compared to the conventional sine waveguide (SWG) SWS. The interaction impedances of the SSWG SWS are much higher than the SWG SWS over the entire operating frequency band. The whole high frequency system, which consists of the SSWG SWS, the coupler, and the attenuator, is designed suitably. From the particle-in-cell simulation results, the maximum output power of the SSWG TWT at the typical frequency of 94 GHz can reach 284.5 W with the cylindrical electron beam of 20.6 kV and 180 mA. Compared to the SWG TWT, the SSWG TWT possesses the higher beam–wave interaction efficiency and the shorter saturated tube length.

Aim: Smoking is harmful to human health. However, the relationship between smoking and blood pressure (BP) has not been consistent. This study aimed to analyse nurses' smoking behaviours and their relationship with BP. Methods: This cross‐sectional study recruited 128 009 nurses in 11 cities in China. They were surveyed with questionnaires including BP measurements. The main contents of the questionnaire included smoking status and other factors that might be associated with hypertension. Multiple linear regression analyses and binary logistic regression analyses were used to analyse the data. Results: The results showed there was a significant difference in the smoking rate among nurses with different characteristics (P < 0.05). For both male and female nurses, smoking was associated with increased diastolic BP and mean arterial pressure, but only with increased systolic BP of male nurses. The prevalence of hypertension among male and female nurses was not related to smoking. Conclusion: Despite a relatively low overall smoking rate, rates among some groups are high. Different cities, hospitals, and departments can combine local data and conditions to formulate targeted tobacco control measures to improve nurses' physical and mental health. Summary statement: What is already known about this topic?: The number of tobacco‐related diseases has been steadily increasing worldwide over the past few decades.A decrease in the smoking rate of medical staff can lead to a decrease in the smoking rate of the general population.The association between smoking and blood pressure remains controversial, and further clarification is required. What this paper adds?: There was a significant difference between the smoking rates of nurses with different characteristics.The smoking rates were relatively high for nurses in emergency departments and operating rooms and those with >10 night shifts per month within the last 6 months.Among nurses, smoking is related to increase in diastolic blood pressure and mean arterial pressure in both men and women but only to increased systolic blood pressure in men; however, there was no association with hypertension risk. The implications of this paper: This study can support nursing managers to take targeted interventions to target smoking populations to reduce their smoking rates.For nurses who smoke due to high pressure, it is suggested that the working hours and cycles should be adjusted appropriately, the proportion of nurses should be increased, and the work intensity should be reduced to alleviate the work pressure.Nurses with high blood pressure should especially be dissuaded from smoking. [ABSTRACT FROM AUTHOR]