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Video
Discussing some of the fascinating engineering that goes into overhead electric power transmission lines. In the past, power generating plants were only able to serve their local areas. As power plants grew larger and further away from populated areas, the need for ways to efficiently move electricity over long distances has become more and more important. Stringing power lines across the landscape to connect cities to power plants may seem as simple as connecting an extension cord to an outlet, but the engineering behind these electric superhighways is more complicated and fascinating than you might think.
- Subjects:
- Building Services Engineering and Electrical Engineering
- Keywords:
- Electric power transmission Electric lines
- Resource Type:
- Video
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Video
Untangling the various equipment you might see in an electrical substation. In many ways, the grid is a one-size-fits-all system - a gigantic machine to which we all connect spinning in perfect synchrony across, in some cases, an entire continent. On the other hand, our electricity needs, including when we need it, how much we need, and how reliably it should be delivered vary widely. Substations play a critical role in controlling and protecting the power grid.
- Subjects:
- Building Services Engineering and Electrical Engineering
- Keywords:
- Electric power distribution Electric substations
- Resource Type:
- Video
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Video
This video continues the series on the power grid by diving deeper into the engineering of large-scale electricity generation. The importance of electricity in our modern world can hardly be overstated. What was a luxury a hundred years ago is now a critical component to the safety, prosperity, and well-being of nearly everyone. Generation is the first step electricity takes on its journey through the power grid, the gigantic machine that delivers energy to millions of people day in and day out. So how does it work?
- Subjects:
- Building Services Engineering and Electrical Engineering
- Keywords:
- Electric power production
- Resource Type:
- Video
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Video
The modern world depends on electricity. It’s a crucial resource, especially in urban areas, but electricity can’t be created, stored, and provided at a later time. The instant it’s produced, it’s used no matter how far apart the producer is from the user. And the infrastructure that makes all this possible is one of humanity’s most important and fascinating engineering achievements: the power grid.
- Subjects:
- Building Services Engineering and Electrical Engineering
- Keywords:
- Electric power distribution
- Resource Type:
- Video
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Video
We normally build a dam to hold water back and store it for use in water supply, irrigation, hydropower, or flood control. But sometimes we have to let some water go. Whether we need it downstream or the impounded water behind the dam is simply too full to store any more, nearly every dam needs a spillway to safely discharge water. The spillway is a critical part of any dam and often the most complex component. So how does it work?
- Subjects:
- Hydraulic Engineering
- Keywords:
- Hydraulic structures Spillways Dams Reservoirs Diversion structures (Hydraulic engineering)
- Resource Type:
- Video
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Video
Traffic management in dense urban areas is an extremely complex problem with a host of conflicting goals and challenges. One of the most fundamental of those challenges happens at an intersection, where multiple streams of traffic - including vehicles, bikes and pedestrians - need to safely, and with any luck, efficiently, cross each others’ paths. However we accommodate it now or in future, traffic will continue to be one of the biggest challenges in our urban areas and traffic signals will continue to be one of its solutions.
- Subjects:
- Transportation
- Keywords:
- Traffic signs signals Roads -- Interchanges intersections Traffic flow
- Resource Type:
- Video
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Video
This video gives a quick overview of how we build underwater structures. Oceans, rivers, and lakes are often beautiful, but they’re not necessarily convenient places to build things. Yet, many types of the infrastructure we depend on every day, including wharves, bridges, and dams, are founded below the water. How do they do it? On this episode, we're talking about different types of underwater construction, including cofferdams, diversions, caissons, and drilled shafts. Whether the construction site is on the bottom of a lake or river, or simply located in the floodplain and only at risk during extreme weather, engineers and construction contractors put a significant amount of thought and consideration into the feasibility and costs of managing this water.
- Subjects:
- Hydraulic Engineering
- Keywords:
- Underwater construction Hydraulic engineering
- Resource Type:
- Video
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Video
Dams serve a wide variety of purposes from hydropower to flood control to storage of water for municipal and industrials uses. But when a dam’s useful purpose fades away, the structure itself still remains. Dams come in all shapes and sizes, but contrary to what you might think, the most dangerous dams are often the smallest, also known as low head dams.
- Subjects:
- Hydraulic Engineering
- Keywords:
- Dam safety Dams Hydraulics
- Resource Type:
- Video
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Video
A weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies. Unlike large dams which create reservoirs, the goal of building a weir across a river isn’t to create storage, but only to gain some control over the water level. Over time, the term weir has taken on a more general definition in engineering to apply to any hydraulic control structure that allows water to flow over its top, often called its crest. In fact, the spillways of many large dams use weirs as control structures. So how do they work?
- Subjects:
- Hydraulic Engineering
- Keywords:
- Dams Hydraulics Weirs
- Resource Type:
- Video
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Video
Engineers need to be able to predict how water will behave in order to design structures that manage or control it. And fluids don’t always behave the way you’d expect. On this episode, we’re talking about one of the most interesting phenomena in open-channel flow: the hydraulic jump.
- Subjects:
- Hydraulic Engineering
- Keywords:
- Hydraulics Hydraulic jump
- Resource Type:
- Video
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Courseware
Reduction of energy consumption of buildings is an important step in the move towards a sustainable economy. How can buildings be made net zero energy, in different climates? This course introduces you to zero energy design. It will teach you a stepped approach to design a zero energy climate concept for existing buildings: homes, schools, offices, shops etc. It will demonstrate how an integrated approach, which takes into account both passive measures (such as thermal insulation and sun shading) and active measures (such as heat pumps and photovoltaic panels), can deliver the best results. It will do so by providing you with an overview of possible measures, and through reviewing several case studies of zero energy buildings in the Netherlands, with lessons for other climates as well. Thus, you will learn which measures are most suitable for individual buildings under local climate conditions. This course is for anyone interested in making buildings more energy efficient, who already possess asic technical knowledge.
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Courseware
For the first time in history, the number of world citizens without access to electricity services has dropped below one billion, but still more than 2.8 billion people lack access to clean and affordable cooking fuels. Access to clean, affordable and reliable energy services for all world citizens is a precondition for the achievement of many other Sustainable Development Goals, such as health and economic development. The provision of sustainable energy services for all is not just a technological challenge or one confined to developing countries. Industrial and post-industrial societies also need to address issues of energy poverty and energy injustice. Rather than tackling the technological dimension of the formidable challenge to provide an inclusive energy system with renewable and climate-neutral energy resources, this course will focus on its social and institutional dimension. Introduction to the principle of the 4 As of energy services – Accessibility, Availability, Affordability, and Acceptability (environmental and social) will enrich your perspective as an engineering professional. Balancing these four critical and interdependent criteria is a recurrent challenge for individuals and society as a whole, as the characterization of the four As evolves with economic development and changing societal preferences. You will learn how the rules of the game as defined in laws, regulation and market designs impact the balance between the 4As. Using a wider socio-technical systems perspective you will discover new solutions for the inclusive provision of energy services beyond the purely technological solutions. After this course you can engage in a richer, more informed debate about how to achieve an inclusive energy system. You will be able to translate this knowledge into strategies to serve society’s future energy needs. The cases presented from developed and developing countries will help you to develop and test your analytical skills. Interviews with industry leaders shaping the energy system will challenge you to reflect on the position these leaders take and the interests they serve. Lastly, you will put yourself to the test by demonstrating your newly acquired knowledge and skills as a strategic policy advisor, in writing guidelines for a strategic action plan for the energy system and institutional context which are relevant for you, in your company, your city or your country.
- Subjects:
- Environmental Engineering and Environmental Policy and Planning
- Keywords:
- Energy policy Sustainable development Power resources -- Economic aspects Power resources -- Environmental aspects
- Resource Type:
- Courseware
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Courseware
How can we ensure the continuous supply of the increasingly scarce raw materials that are needed to make the products we use every day? In this course, we will look at the potential benefits of circular procurement and how recycling technologies and more efficient ways of collecting and recycling critical raw materials (CRMs) can make your business and production more resource resilient. A good number of the materials found in everyday products are now referred to as “critical”. This means that there is a risk of failure in their supply and that they are also critical in terms of economic importance. Many metals, for instance, are already critical or could become critical in the near future due to their limited availability and the growing demand for products worldwide. Think of the newest electronic products that contain critical metals such as gallium, which is used in integrated circuits; beryllium, used in electronic and telecommunications equipment and permanent magnets and germanium found in infra-red optics. Innovative product design and reusing, recycling and remanufacturing products can help to deal with a raw materials shortage. But this can only provide an integrated solution if we keep CRMs in the loop through smarter CRM management. The starting point is to identify CRMs in products. It is not always clear what materials are in which products. It is, therefore, necessary to keep all metals in the loop for as long as possible. Scarcity in the supply chain can not only damage businesses but also negatively impact economic development and the environment. For this reason, the course will also discuss environmental issues and electric and electronic waste regulations. This course will be of value to a wide range of professionals working in or interested in this field. These include professionals involved in producing products containing CRMs (such as electronics) as well as local or national government officials tasked with organizing waste management and recycling for these products. Students interested in the field of waste management will also find this course helpful for their studies in electronics, industrial design, and industrial ecology.
- Subjects:
- Environmental Engineering
- Keywords:
- Refuse refuse disposal Waste products Recycling (Waste etc.) Raw materials Strategic materials
- Resource Type:
- Courseware
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Courseware
On the 28th of April 2012 the contents of the English as well as German Wikibooks and Wikipedia projects were licensed under Creative Commons Attribution-ShareAlike 3.0 Unported license. An URI to this license is given in the list of figures on page 175. If this document is a derived work from the contents of one of these projects and the content was still licensed by the project under this license at the time of derivation this document has to be licensed under the same, a similar or a compatible license, as stated in section 4b of the license. The list of contributors is included in chapter Contributors on page 169. The licenses GPL, LGPL and GFDL are included in chapter Licenses on page 179, since this book and/or parts of it may or may not be licensed under one or more of these licenses, and thus require inclusion of these licenses. The licenses of the figures are given in the list of figures on page 175. This PDF was generated by the LATEX typesetting software. The LATEX source code is included as an attachment (source.7z.txt) in this PDF file. To extract the source from the PDF file, we recommend the use of http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/ utility or clicking the paper clip attachment symbol on the lower left of your PDF Viewer, selecting Save Attachment. After extracting it from the PDF file you have to rename it to source.7z. To uncompress the resulting archive we recommend the use of http://www.7-zip.org/. The LATEX source itself was generated by a program written by Dirk Hünniger, which is freely available under an open source license from http://de.wikibooks.org/wiki/Benutzer:Dirk_Huenniger/wb2pdf. This distribution also contains a configured version of the pdflatex compiler with all necessary packages and fonts needed to compile the LATEX source included in this PDF file.
- Subjects:
- Biology
- Keywords:
- Biology
- Resource Type:
- Courseware
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e-book
Chemistry is the study of matter and the ways in which different forms of matter combine with each other.
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Video
鄭國江訪談實錄乃《鄭國江詞作手稿特藏》之延伸，以訪談形式記錄手稿特藏背後的故事。特藏載有詞人鄭國江於香港理工大學圖書館進行的訪談錄影片段，令手稿特藏內容更加豐富充實。錄影片段以六個主題分類，包括「詞人緣起」、「創作靈感」、「詞作特色」、「勵志詞人」、「兒歌作品」和「鄭國江詞作手稿特藏」。讀者可對詞人鄭國江如何入行、部份作品背景、本地流行詞作文化、以至香港粵語流行曲的歷史有所了解。 The Cheng Kok-kong’s Oral History Interview project is an extension of the "Cheng Kok-kong’s Lyric Manuscript Collection" to recall the stories behind the lyric manuscripts. The project includes interview recordings with Mr. Cheng Kok-kong at The Hong Kong Polytechnic University Library, and it aims at enriching the content of the Manuscript Collection. The interview recordings are divided in to six categories, including “Becoming a Lyricist”, “Creations and Inspirations”, “Characteristics of Lyrics”, “The Inspirational Lyricist”, “Songs for Children” and “Cheng Kok-kong’s Lyric Manuscript Collection”. The content of the recordings includes how Cheng had become a lyricist, background of some of his lyrics, lyric-writing culture of local pop music, and Cantopop history in Hong Kong.
- Subjects:
- Performing Arts and Hong Kong Studies
- Keywords:
- Songs Chinese China -- Hong Kong Popular music Lyric writing (Popular music) Lyricists
- Resource Type:
- Video
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Video
The video covered four questions: (1) What are the works in which copyright subsists? (2) What is the duration of copyright? (3) Who owns copyright in a work of joint authorship? (4) What kind of acts may constitute copyright infringement? The Copyright Classroom series is supported by HKU Teaching Development Grant (TDG) and Knowledge Exchange (KE). It is a collaborative project of HKU Law Faculty, Architecture Faculty, Knowledge Exchange Office, Technology-Enriched Learning Initiative, and Centre for the Enhancement of Teaching and Learning. For further reference - Copyright Ordinance (Cap 528).
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Video
The video covered two questions: (1) Can students share other people's work during in-class presentations? (2) Can students who work as private tutors photocopy past papers? The Copyright Classroom series is supported by HKU Teaching Development Grant (TDG) and Knowledge Exchange (KE). It is a collaborative project of HKU Law Faculty, Architecture Faculty, Knowledge Exchange Office, Technology-Enriched Learning Initiative, and Centre for the Enhancement of Teaching and Learning. For further reference - Copyright Ordinance (Cap 528).
- Keywords:
- Photocopying -- Fair use (Copyright) Copyright infringement Copyright Fair use (Copyright)
- Resource Type:
- Video
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Video
The video covered three questions: (1) Can teachers play films, videos, or songs during lesson? (2) How can reference materials be distributed to students without infringing copyright? (3) Can teachers include other people's work in exam papers? The Copyright Classroom series is supported by HKU Teaching Development Grant (TDG) and Knowledge Exchange (KE). It is a collaborative project of HKU Law Faculty, Architecture Faculty, Knowledge Exchange Office, Technology-Enriched Learning Initiative, and Centre for the Enhancement of Teaching and Learning. For further reference - Copyright Ordinance (Cap 528).
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Video
The video covered two questions: (1) What should buskers do if they want to sing famous pop songs in their performance without infringing any copyright? (2) What are moral rights? How are they different from copyright? The Copyright Classroom series is supported by HKU Teaching Development Grant (TDG) and Knowledge Exchange (KE). It is a collaborative project of HKU Law Faculty, Architecture Faculty, Knowledge Exchange Office, Technology-Enriched Learning Initiative, and Centre for the Enhancement of Teaching and Learning. For further reference - Copyright Ordinance (Cap 528).