Clipper amplitude modulator

An amplitude modulated wave is defined as a wave form in which the amplitude of a sinusoidal signal (carrier) is varied in accordance with a modulating signal whose frequency is much lower than the frequency of the carrier signal. Numerous devices have been found for generating an amplitude modulated wave. In some modulators the amplitude of the carrier is actually varied in accordance with the modulating signal. In other types of modulators the carrier and the modulating signal are simultaneously applied to a nonlinear element or circuit. The output of this non-linear element is a distorted wave containing many frequencies. The amplitude modulated wave is then obtained by selecting those particular frequency components needed to constitute an amplitude modulated wave. In this thesis, the possibility of obtaining an amplitude modulated wave by a different method has been investigated. Namely, the carrier signal is clipped with a modulating signal by employing the clipping action of a full-wave diode clipper. The resulting clipped wave form closely resembles an amplitude modulated wave. The close agreement between the mathematical analysis of the wave form in question and the experimental results substantiates the validity of this method --Introduction, page 1

Nevşehir ilinde alternatif mücadele yöntemleri ile organik tarımının yaygınlaştırılması

Bu çalışmada; İki farklı uygulama arazisinde organik tarım faaliyetleri yapılmış olup birinci arazide 301 tane farklı türlerden fidan dikilmiştir. Bu fidanlar belirli gruplara ayrılıp farklı yetiştirme teknikleri uygulanmıştır. Irmak kenarındaki diğer arazide ise farklı türlerde fide yetiştiriciliği yapılmıştır. Belirli gruplara ayrılan bu fidanlarda farklı yetiştirme tekniği uygulanmıştır. Bu yetiştirme teknikleri sırasında ortaya çıkan sorunlar ve zararlılarla organik tarım faaliyetlerinde kullanılan yöntemler denenmiştir. Kabak mozaik virüs hastalığı, domateste ve kabakta yaprak yanıklığı, patates uyuz hastalığı, yaprak pireleri gibi hastalık ve zararlılara sıkça rastlanılmış ve mücadele yöntemleri denenmiştir

Education of healthcare personnel working with pediatric patients during covid-19 pandemic within the framework of infection control Covid-19 pandemisinde enfeksiyon kontrol çalışmaları çerçevesinde çocuk hastalarla çalışan sağlık personeli eğitimi

© 2020, AVES. All rights reserved.Objective: In the early stages of any epidemic caused by new emerging pathogens healthcare personnel is subject to a great risk. Pandemic caused by SARS-CoV-2, proved to be no exception. Many healthcare workers died in the early stages of pandemic due to inadequate precautions and insufficient protection. It is essential to protect and maintain the safety of healthcare personnel for the confinement of pandemic as well as continuity of qualified healthcare services which is already under strain. Educating healthcare personnel on appropiate use of personal protective equipment (PPE) is as essential as procuring them. Material and Methods: A survey is conducted on 4927 healthcare personnel working solely with pediatric patients from 32 different centers. Education given on PPE usage were questioned and analyzed depending on age, sex, occupation and region. Results: Among four thousand nine hundred twelve healthcare personnel from 32 different centers 91% (n= 4457) received education on PPE usage. Of those who received education only 36% was given both theoretical and applied education. Although there was no differences among different occupation groups, receiving education depended on regions. Conclusion: It is essential to educate healthcare personnel appropiately nationwidely for the continuity of qualified healthcare services during the pandemic

Evaluation of vaccination status of health care workers for recommended vaccines and their acceptance of SARS-CoV-2 vaccines

© 2022 The Author(s). Published with license by Taylor & Francis Group, LLC.Introduction: Health care workers (HCWs) are disproportionately exposed to infectious diseases and play a role in nosocomial transmission, making them a key demographic for vaccination. HCW vaccination rates are not optimal in many countries; hence, compulsory vaccination policies have been implemented in some countries. Although these policies are effective and necessary under certain conditions, resolving HCWs’ hesitancies and misconceptions about vaccines is crucial. HCWs have the advantage of direct contact with patients; hence, they can respond to safety concerns, explain the benefits of vaccination, and counter antivaccine campaigns that escalate during pandemics, as has been observed with COVID-19. Method: A short survey was carried out in May–June 2020 on the vaccination status of HCWs working with pediatric patients with COVID-19. The survey inquired about their vaccination status (mumps/measles/rubella [MMR], varicella, influenza, and diphtheria/tetanus [dT]) and willingness to receive hypothetical future COVID-19 vaccines. The respondents were grouped according to gender, age, occupation, and region. Results: In total, 4927 HCWs responded to the survey. Most were young, healthy adults. The overall vaccination rates were 57.8% for dT in the past 10 years, 44.5% for MMR, 33.2% for varicella, and 13.5% for influenza. Vaccination rates were the highest among physicians. The majority of HCWs (81%) stated that they would be willing to receive COVID-19 vaccines. Conclusion: Although vaccination rates for well-established vaccines were low, a majority of HCWs were willing to receive COVID-19 vaccines when available. Education and administrative trust should be enhanced to increase vaccination rates among HCWs