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Broadcast Journalism : Techniques of Radio and Television News
Now in its 8th edition, Broadcast Journalism continues to be an essential text on the production of news broadcasting and the practical skills needed. It includes not only basic techniques and classic examples for the production of radio and TV news, but also new technology and the latest case studies.The fundamental skills of interviewing, news writing and production now have to cope with the prevalence of Fake News and Deep Fakes and verifying content in an endless flow of social media.This edition also includes newsgathering with mobile devices, live reporting and using data and graphics.There are dozens of new images and links for downloads and further reading, plus end-of-chapter exercises and tutor notes. This continues to be an indispensable textbook for broadcast journalism and communications students looking for an in-depth guide to the industry.
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32A 4P PV Direct Current Disconnect Switch Outdoor Dustproof and Waterproof Transfer Switch IP66 Photovoltaic Direct Current Switch
Features: Insulation Fireproof Material: This switch is adopts imported PPE material, high insulation and fireproof, safer to use. Fast Arc Extinguishing: It uses magnetic double arc extinguishing, which can effectively inhibit the arc. Padlock Design: Equipped with safety padlock, safer and more reliable to use. IP66 Level Waterproof and Dustproof: Selected premium materials, using high-strength waterproof rings, with nice waterproof and dustproof effect. 3 Types Optional: There are 3 types available, you can choose common version, upgraded version, two in one out version depending on your needs. Wide Applications: Widely used in various scenarios, such as power generation, oil, metallurgy, ships, public facilities, domestic factories and other construction sites.
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32A 4P PV Direct Current Disconnect Switch Outdoor Dustproof and Waterproof Transfer Switch IP66 Photovoltaic Direct Current Switch
Features: Insulation Fireproof Material: This switch is adopts imported PPE material, high insulation and fireproof, safer to use. Fast Arc Extinguishing: It uses magnetic double arc extinguishing, which can effectively inhibit the arc. Padlock Design: Equipped with safety padlock, safer and more reliable to use. IP66 Level Waterproof and Dustproof: Selected premium materials, using high-strength waterproof rings, with nice waterproof and dustproof effect. 3 Types Optional: There are 3 types available, you can choose common version, upgraded version, two in one out version depending on your needs. Wide Applications: Widely used in various scenarios, such as power generation, oil, metallurgy, ships, public facilities, domestic factories and other construction sites.
Price: 29.41 £ | Shipping*: 0.00 £ -
32A 4P PV Direct Current Disconnect Switch Outdoor Dustproof and Waterproof Transfer Switch IP66 Photovoltaic Direct Current Switch
Features: Insulation Fireproof Material: This switch is adopts imported PPE material, high insulation and fireproof, safer to use. Fast Arc Extinguishing: It uses magnetic double arc extinguishing, which can effectively inhibit the arc. Padlock Design: Equipped with safety padlock, safer and more reliable to use. IP66 Level Waterproof and Dustproof: Selected premium materials, using high-strength waterproof rings, with nice waterproof and dustproof effect. 3 Types Optional: There are 3 types available, you can choose common version, upgraded version, two in one out version depending on your needs. Wide Applications: Widely used in various scenarios, such as power generation, oil, metallurgy, ships, public facilities, domestic factories and other construction sites.
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How can I convert direct current into pulsed direct current?
To convert direct current (DC) into pulsed direct current (PDC), you can use a device called a pulse width modulator (PWM). A PWM circuit rapidly switches the DC voltage on and off at a specific frequency, creating a pulsed output. By adjusting the duty cycle of the PWM signal, you can control the width and frequency of the pulses, effectively converting the steady DC voltage into a pulsed waveform. This pulsed output can be useful in applications such as controlling the speed of motors or dimming LED lights.
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Can high-voltage direct current be converted into low-voltage direct current?
Yes, high-voltage direct current (HVDC) can be converted into low-voltage direct current (LVDC) using a device called a voltage converter or transformer. These devices can step down the voltage level of the DC power to a lower level suitable for specific applications. This conversion process is commonly used in various industries and applications where different voltage levels are required for different devices or systems.
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How can one convert 400 volts direct current into 150 volts direct current?
To convert 400 volts direct current (DC) into 150 volts DC, you can use a DC-DC converter. This device can step down the voltage from 400V to 150V by using a transformer and electronic circuitry. The converter will adjust the voltage level while maintaining the direct current nature of the power supply. This allows for the efficient and precise conversion of the voltage to meet the specific requirements of the application.
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What are direct current generators?
Direct current generators are machines that convert mechanical energy into direct current (DC) electrical energy. They consist of a rotor, which rotates within a magnetic field, and a stator, which contains the stationary conductors that produce the electrical output. As the rotor spins, it induces a current in the stator windings, resulting in a direct current output. Direct current generators are commonly used in applications where a steady and constant electrical supply is required, such as in battery charging systems, electroplating, and certain types of industrial machinery.
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32A 4P PV Direct Current Disconnect Switch Outdoor Dustproof and Waterproof Transfer Switch IP66 Photovoltaic Direct Current Switch
Features: Insulation Fireproof Material: This switch is adopts imported PPE material, high insulation and fireproof, safer to use. Fast Arc Extinguishing: It uses magnetic double arc extinguishing, which can effectively inhibit the arc. Padlock Design: Equipped with safety padlock, safer and more reliable to use. IP66 Level Waterproof and Dustproof: Selected premium materials, using high-strength waterproof rings, with nice waterproof and dustproof effect. 3 Types Optional: There are 3 types available, you can choose common version, upgraded version, two in one out version depending on your needs. Wide Applications: Widely used in various scenarios, such as power generation, oil, metallurgy, ships, public facilities, domestic factories and other construction sites.
Price: 34.4 € | Shipping*: 0.00 € -
High Voltage Direct Current Transmission : Converters, Systems and DC Grids
Presents the latest developments in switchgear and DC/DC converters for DC grids, and includes substantially expanded material on MMC HVDC This newly updated edition covers all HVDC transmission technologies including Line Commutated Converter (LCC) HVDC; Voltage Source Converter (VSC) HVDC, and the latest VSC HVDC based on Modular Multilevel Converters (MMC), as well as the principles of building DC transmission grids. Featuring new material throughout, High Voltage Direct Current Transmission: Converters, Systems and DC Grids, 2nd Edition offers several new chapters/sections including one on the newest MMC converters.It also provides extended coverage of switchgear, DC grid protection and DC/DC converters following the latest developments on the market and in research projects.All three HVDC technologies are studied in a wide range of topics, including: the basic converter operating principles; calculation of losses; system modelling, including dynamic modelling; system control; HVDC protection, including AC and DC fault studies; and integration with AC systems and fundamental frequency analysis.The text includes: A chapter dedicated to hybrid and mechanical DC circuit breakersHalf bridge and full bridge MMC: modelling, control, start-up and fault managementA chapter dedicated to unbalanced operation and control of MMC HVDCThe advancement of protection methods for DC gridsWideband and high-order modeling of DC cablesNovel treatment of topics not found in similar books, including SimPowerSystems models and examples for all HVDC topologies hosted by the 1st edition companion site. High Voltage Direct Current Transmission: Converters, Systems and DC Grids, 2nd Edition serves as an ideal textbook for a graduate-level course or a professional development course.
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What to Do When the News Scares You : A Kid's Guide to Understanding Current Events
This latest installment in the bestselling What To Do series tackles children’s feelings of anxiety around current events and what is portrayed in the news.Scary news is an inevitable part of life. This book can support and guide efforts to help scary news seem a bit more manageable for young people. Whether from television news reports, the car radio, digital media, or adult discussions, children are often bombarded with information about the world around them.When the events being described include violence, extreme weather events, a disease outbreak, or discussions of more dispersed threats such as climate change, children may become frightened and overwhelmed.Parents and caregivers can be prepared to help them understand and process the messages around them by using this book. What to Do When the News Scares You provides a way to help children put scary events into perspective. And, if children start to worry or become anxious about things they’ve heard, there are ideas to help them calm down and cope.This book also helps children identify reporters’ efforts to add excitement to the story which may also make threats seem more imminent, universal, and extreme. Read and complete the activities in What to Do When the News Scares You with your child to help them to understand the news in context—who, what, where, when, how—as a means of introducing a sense of perspective. Also available in Spanish Qué Hacer Cuando las Noticias te Asustan: Guía para Niños para Entender las Noticias Actuales
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What is direct current technology?
Direct current (DC) technology is a type of electrical power transmission and distribution system in which the flow of electric charge is uni-directional. This means that the electric current flows in one direction, from the positive terminal to the negative terminal. DC technology is commonly used in small electronic devices, such as cell phones and laptops, as well as in some renewable energy systems, like solar panels and batteries. It is also used in some specialized industrial applications where a constant and stable power supply is required.
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Is 12V direct current dangerous?
A 12V direct current is generally not considered dangerous to the human body. It is a low voltage and does not have enough energy to cause significant harm. However, it is still important to handle electrical equipment and circuits with caution and follow safety protocols to prevent accidents or injuries. Additionally, while 12V DC may not be dangerous on its own, it can still be a hazard if it is part of a larger electrical system or if it is mishandled.
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Are TV and radio stations obligated to broadcast news?
TV and radio stations are not legally obligated to broadcast news, but many choose to do so as part of their commitment to serving the public interest. In some countries, there may be regulations or licensing requirements that mandate a certain amount of news programming, but this varies by jurisdiction. Ultimately, the decision to include news in their programming is up to the individual stations and their management.
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Is there an inverter that converts variable direct current into a fixed 12V direct current?
Yes, there are inverters known as buck-boost converters that can convert variable direct current into a fixed 12V direct current. These converters are designed to regulate the output voltage to a specific level, such as 12V, regardless of fluctuations in the input voltage. They are commonly used in applications where a stable voltage output is required, such as in automotive electronics or solar power systems.
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