Knowledge, attitudes, and practices regarding Covid-19 and their relationship with Covid-19 booster vaccination status among women with infertility

Objective:To elucidate the relationship among knowledge,attitudes,and practices regarding Covid-19 and their relationship with booster vaccination status among women with infertility.Methods:This questionnaire-based cross-sectional study was performed online and offline among women with infertility who visited an infertility clinic in Jakarta,Indonesia.We assessed the patient’s knowledge,attitudes,and practices regarding Covid-19 and their relationship with booster vaccination status and sociodemographic profile.Results:A total of 178 subjects participated in this study,and most participants(92.6%)had received booster Covid-19 vaccines.From the questionnaire,74.2%had good knowledge,and 99.4%had good attitudes regarding Covid-19;however,only 57.9%of patients had good practices.A weak positive correlation existed between knowledge and attitudes(r=0.11,P=0.13)and a moderate negative correlation between attitudes and practices(r=-0.44,P=0.56).Participants’knowledge about vaccines and infertility was correlated with booster vaccination status(P=0.04).Academic background(P=0.01)and attitudes(P=0.01)were also correlated with booster vaccination status.The significant determinants of hesitance of receiving Covid-19 booster vaccines were high school education or below(OR=0.08,95%CI 0.02-0.36)and poor practices(OR=0.21,95%CI 0.05-0.95).Conclusions:The majority of the participants had received the Covid-19 booster vaccine and had good knowledge and attitudes but poor practices regarding Covid-19.Most participants had poor knowledge about the relationship between infertility and the Covid-19 vaccine.The general population should be more informed and reminded about practices to prevent Covid-19 and the relationship between vaccination and fertility to increase the number of people who receive Covid-19 booster vaccines.

Milestone progress of the HEPS booster commissioning

The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.

Mushroomβ-glucan and polyphenol formulations as natural immunity boosters and balancers:nature of the application

Mushrooms are experiencing a kind of renaissance as a part of the contemporary human diet.These valuable organisms are more than food,they fit in perfectly as a novel market group known as nutra-mycoceuticals.Immune-balancing mushroom dietary fibers and secondary metabolites such as polyphenols are the main focus of the healthcare industry.Wellness and cosmetic companies are increasingly using mushroom extracts rich in these ingredients.This review considers the basic molecular immunomodulatory mechanisms of action of the most commonly used mushroom dietary fibers,β-glucans.The literature data on their bioavailability,metabolic transformations,preclinical and human clinical research,and safety are discussed.Immunomodulatory mechanisms of polyphenol ingredients are also considered.These molecules present great potential in the design of the new immunity balancer formulations according to their widespread structural diversity.Finally,we draw attention to the perspectives of modern trends in mushroom nutraceutical and cosmeceutical formulations to strengthen and balance immunity.

Intention and hesitancy to receive a booster dose of COVID-19 vaccine among pregnant women using a health belief model: A cross-sectional study

Objective:To examine the pattern of COVID-19 infection and vaccination,and to explore pregnant women’s willingness and reluctance to accept a booster dose of the COVID-19 vaccine.Methods:This was a cross-sectional,descriptive study with a convenient sample size using a structured questionnaire among pregnant women attending the gynecology and obstetrics department at Acıbadem Mehmet Ali Aydinlar Hospital,Istanbul,Türkiye.The Health Belief Model scale was used to assess the intention and reluctance to accept a booster dose of the COVID-19 vaccine.Results:A total of 145 participants,with a mean age of(33.5±4.8)years,and a gestational age of(30.9±7.3)weeks,were enrolled in this study.88.8%Received full doses of the Pfizer-BioNTech vaccination.47.8%Participants suffered from vaccine adverse effects.Health Belief Model demonstrated a significant finding of perceived susceptibility(P<0.001),perceived severity of COVID-19 complications(P<0.001),and perceived benefits regarding a booster COVID-19 vaccination(P<0.001).Conclusions:Most pregnant women who received the COVID-19 immunization express a significant intention to receive a booster dose,regardless of the adverse effects experienced from the previous doses.However,a small percentage of the study sample express hesitancy about receiving the booster dose.

Retrospective analysis of early COVID-19 vaccine efficacy in older individuals receiving primary cycle, first booster and second booster

Background:We analysed data garnered during the ongoing Italian nationwide coronavirus disease 2019(COVID-19)vaccination campaign for comparing early COVID-19 monovalent vaccine efficacy in older persons who received the primary vaccination cycle,the first vaccine booster,and the second vaccine booster.Methods:We conducted a retrospective analysis of early COVID-19 monovalent vaccine efficacy(i.e.,within 120 days)against COVID-19 related hospitalizations,intensive care unit(ICU)admissions and deaths in older persons(i.e.,aged≥80 years),by accessing official data of the COVID-19 national integrated surveillance program instituted by the Italian National Institute of Health.Vaccine efficacy was compared(odds ratio;OR)among cohorts receiving the primary vaccination cycle,the first vaccine booster,and the second vaccine booster.Results:A consistent decline could be seen in the rate of COVID-19 hospitalizations,ICU admissions and deaths with increasing number of monovalent immunizations.Within 120 days of administration,the first and second vaccine boosters had superior efficacy compared to the primary vaccination cycle,reducing the odds of all endpoints between 62%-71%and 69%-84%,respectively.A modestly superior early efficacy could also be noted for the second versus the first monovalent vaccine booster(ORs of all endpoints further reduced by 18%-48%).Conclusion:Since an increasing number of immunizations is associated with a lower risk of unfavourable COVID-19 outcomes,vaccine boosters may be useful for limiting the clinical burden of this infectious disease in elderly populations.

解一类奇异摄动两点边界值问题的Booster方法

研究一类奇异摄动两点边界值问题,用Booster方法进行求解,使其收敛阶提高了O(εn+ 1 ) ,尤其在特殊加密网格上,使其收敛阶从O(N- 2 )提高到O(εn+ 1 N- 2 ) .其中ε为摄动小参数,n为渐近展开的阶数.最后给出了数值例子.

用AdaBooster算法实现中文文本分类问题

文本分类是文本挖掘的一个重要内容,在很多方面都有着广泛的应用。为了实现中文文本分类问题,先采用分词技术和特征词统计相关方法得到每类训练文档的特征向量中心(质心),通过比较测试文档到质心的距离来实现中文文档分类,然后采用AdaBooster算法通过不断调整每类训练文档的质心构建一个强分类器。实验表明:采用AdaBooster算法进行中文文本分类时,算法简单、分类速度快、正确率高、占用内存小而且可以根据训练文档的不同实时地调整迭代次数。

Persistence of hepatitis B vaccine immune protection and response to hepatitis B booster immunization

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E-Booster电液制动主缸液压力跟随控制研究

基于E-Booster集成式电子液压制动(I-EHB)系统,研究其制动主缸液压力跟随特性。从制动系统PV特性(液压力-齿条行程特性关系)出发,采用双闭环模糊PID控制算法。通过对系统方案及控制策略分析,设计控制单元,并搭建试验台架对控制算法进行验证。结果表明:在环境条件及系统参数不变的前提下,相较于单闭环控制算法,双闭环模糊PID控制算法下的制动主缸液压力在阶跃试验中有更快的建压响应,其0~50 bar的建压最短响应时间可达32 ms,较单闭环控制快34 ms,最大液压力控制精度提升了2.58%,验证了算法的可行性,为接下来进一步研究系统鲁棒性提供了一定的理论基础。

Transfer matrix method for determination of the natural vibration characteristics of elastically coupled launch vehicle boosters

The analysis of natural vibration characteristics has become one of important steps of the manufacture and dynamic design in the aerospace industry. This paper presents a new scenario called virtual cutting in the context of the transfer matrix method of linear multibody systems closed- loop topology for computing the free vibration characteristics of elastically coupled flexible launch vehicle boosters. In this approach, the coupled system is idealized as a triple-beam system-like structure coupled by linear translational springs, where a non-uniform free-free Euler-Bemoulli beam is used. A large thrust-to-weight ratio leads to large axial accelera- tions that result in an axial inertia load distribution from nose to tail. Consequently, it causes the development of significant compressive forces along the length of the launch vehicle. Therefore, it is important to take into account this effect in the transverse vibration model. This scenario does not need the global dynamics equations of a system, and it has high computational efficiency and low memory requirements. The validity of the presented scenario is achieved through com- parison to other approaches published in the literature.

Flow Characteristics of Expansion Energy Used Pneumatic Booster

The most common booster is called input pressure reduced （IPR） booster. However, this type of booster has its own shortages, such as its small output flow, when the boosting ratio is higher, the shortage becomes more distinct. Recent research on pneumatic boosters mainly focused on the factors that influence the characteristics of the boosters, some new kinds of pneumatic booster structures were designed, but the efficiency and output flow of these boosters are still not improved sufficiently. In order to improve the output flow of the pneumatic booster, a new kind of booster, expansion energy used （EEU） booster, is proposed. Non-linear differential equations of the pneumatic booster are set up. By using the software MATLAB/Simulink for simulation, the motion characteristics of the pistons, the characteristics of the output flow of the boosters are obtained for analysis of a principle. The principle, which is used to elevate the output flow of the two kinds of boosters, is that the average pressure of the air in the driving chambers of the EEU booster is higher than that of the IPR booster. The simulation and experimental research of the output flow characteristics are done. The simulation and experimental results are in a good accordance. And the simulation and experimental results show that when the air source pressure and the output pressure are set at 0.6 MPa and 0.8 MPa, respectively, with the increase of the terminal pressure of the air in the driving chamber, the output flow of the IPR booster ascends stably. As the terminal pressure of the air in the driving chamber goes up, the output flow of the EEU booster rises, and later it almost remains constant. In addition, with the same terminal pressure, the output flow of the EEU booster is greater than that of the IPR booster, and the difference decreases when the terminal pressure grows. At last, the output pressure is set at 0.8 MPa, under the optimum work state of the EEU booster, the output flow of the two kinds of boosters all declines with the rise of the boosting ratio. Furthermore, the output flow of the EEU booster is higher than that of IPR booster by 95 L/min approximately. The proposed research lays the foundation for optimistic of the EEU booster.

Monforts:通过Eco Booster改善节能

由德国门富士公司设计的Eco Booster热回收系统（图1）．可降低拉幅机在干燥和热定型工艺过程中的能量损耗。与单纯的静态换热器机组相比。这种新型换热器机组町在运行过程中自清洁．从而避免了停机维护时间。

Use of booster fans in underground coal mining to advantage

A booster fan is an underground main fan which is installed in series with a main surface fan and used to boost the air pressure of the ventilation to overcome mine resistance.Currently booster fans are used in several major coal mining countries including the United Kingdom,Australia,Poland and China.In the United States booster fans are prohibited in coal mines although they are used in several metal and non-metal mines.A study has been undertaken to examine alternatives for ventilating an underground room and pillar coal mine system.A feasibility study of a hypothetical situation has shown that current ventilation facilities are incapable of fulfilling mine air requirements in the future due to increased seam methane levels.A current ventilation network model has been prepared and projected to a mine five years plan."Ventsim visual" software simulations of different possible ventilation options have been conducted in which varying methane levels are found at working faces.The software can also undertake financial simulations and project present value total costs for the options under study.Several scenarios for improving the ventilation situation such as improving main surface fans,adding intake shafts,adding exhaust shafts and utilizing booster fans have been examined.After taking into account the total capital and operating costs for the five years mine plan the booster fan scenarios are recommended as being the best alternatives for further serious consideration by the mine.The optimum option is a properly sized and installed booster fan system that can be used to create safe work conditions,maintain adequate air quantity with lowest cost,generate a reduction in energy consumption and decrease mine system air leakage.

Seroprevalence of anti-HBs antibodies and the need for booster vaccination in children under 5 years of age born to HBsAg-negative mothers

Objective:To determine the proportion of HBV surface antigen(anti-HBs)antibody positive children under five years of age born to HBs Ag-negative mothers and to analyze the possible related factors following implementation of a hepatitis B vaccination program for infants in Indonesia 22 years ago.Methods:Blood samples were taken from children under five years of age born to HBsAg-negative mothers who have completed primary vaccination series.Anti-HBs antibodies were determined by using rapid test.Data of age,gender,nutritional status,vaccination timing or vaccination compliance,and booster vaccination were collected from vaccination card.Results:Ninety children were enrolled,consisting of 47 females and 43 males with a mean age of 2.3 years.Twenty two(24.4%)children received booster vaccine between 18 and 24 months and 55(61.1%)were anti-HBs positive.Among factors of age,gender,nutritional status,compliance to vaccination and booster vaccine,only administration of booster vaccine was significantly associated with anti-HBs status(OR 5.45,95%CI 1.45,20.52).Children who received booster vaccine at age of 18-24 months were 5.45 times more likely to be anti-HBs positive than that of children who did not receive booster vaccine.Conclusions:Booster vaccine rate is low among children under 5 years of age but is associated with anti-HBs positivity.Booster vaccination may be required to improve anti-HBs seropositivity.

Surrounding Plants as Reliable Immune Boosters

Recently, due to the growth of environmental pollution and the increase in the resistance of microorganisms to artificially create chemical drugs, there has been an urgent need for a radical change in the direction of the medical preparations development, for changing chemicals to naturally produced ones based on herbal natural remedies. Since homeopathy is a branch of medicine that includes not only herbal preparations, but also chemical ingredients, our newly developed patent—although it belongs to the field of homeopathy—is its offshoot aimed solely at maintaining the body’s strength without harming it, increasing the survival of the body in a polluted environment removing toxins from the body by strengthening adaptive immune mechanisms. Thus, thyme, cumin, oregano, licorice, and other natural resources of the earth, which are the basis of our patent, successfully fight cold and diseases of the upper respiratory tract. The article presents a methodology for the development of a new herbal preparation, its dosage, and use as the main ingredient in a treatment course in infectious diseases.

Evaluation of Performance of Thermal and Electrical Hybrid Adsorption Chiller Cycles with Mechanical Booster Pumps

Large amounts of waste heat below 100oC from the industrial sector are re-leased into the atmosphere. It has been suggested that energy system efficiency can be increased with adsorption chillers. However, the cooling power and coefficient of performance (COP) of conventional adsorption chillers significantly decrease with the desorption temperature. In this paper, we proposed a mechanical booster pump (MBP)-assisted adsorption chiller cycle, and evaluated its performances. In the cycle, a MBP was incorporated into a zeolite-water-type adsorption chiller for facilitating water vapor transportation between an adsorber and an evaporator/condenser. We have experimentally studied the effect of the input electrical power of MBP on the performances of adsorption chiller cycle. It has been demonstrated that the heat input achieved by using MBP at the desorption temperature of 50oC was 1.6 times higher than that of without MBP at the desorption temperature of 60oC. And the increase of pump power was found to be effective in increasing the heat input. Therefore, it was confirmed that the operation range of desorption temperature, which can be generated by using the waste heat, was extended and the cooling power was increased directly by using MBP.

Optimum Inclination Angles of Booster Mirrors and Solar Radiation Availability on the Horizontal and Inclined Box Type Solar Cookers

Mathematical relations are developed to compute optimum inclination angle of booster mirror for horizontally placed cooker (λ) and for optimally inclined cooker (ψ) during all months (selected day) of the year at 30°N latitude for maximizing the reflected component of solar intensity onto the absorber plate of the cooker. A solar radiation model is also developed and used to compute the ratio of various solar intensities on horizontal, inclined and normal surface of the absorber plate for all months at 30&deg;N latitude. These ratios give a clear indication of greater solar radiation availability on the optimally inclined cooker as compared to the horizontally placed cooker for faster cooking especially during winter months when solar radiation capture is small. Experimental validations have also been performed to access the accuracy of the developed relations and model.

让朗读课文变为歌颂诗篇,EP Booster迷你激励效果器

EP Booster迷你激励效果器来自美国著名乐器品牌Xotic,该产品于2009年研发成功,并在同年9月正式上市。Xotic品牌创始于1996年,产品涵盖了电吉他、电贝司、效果器、乐器配件等产品,而其产品精巧的设计和无可挑剔的性能赢得了大量专业乐手的青睐,较为知名的使用者有Jimmy Page、Eddie Van Halen、Eric Johnson、Andy Timmons等。

虹科发布GSM Booster

MikroElektronika公司发布GSMBooster，用以取代TelitGM862-QUADmodule的产品。虽然封装相同，但GSMBooster包含新的TelitGL865-QUADGSMrood—ule、MMCXGSM天线接口、SIM卡槽和CSTP50pin垂直的SMDmolexconnector（male）用于进一步的连接。

Sanyo推出棒型USB充电器Eneloop Stick Booster

Sanyo新推出一款型号为KBC—D1 AS的棒型外观的EneloopStickBooster充电器，抢攻3C玩家市场。