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Video
Using of Z table
- Subjects:
- Statistics and Research Methods
- Keywords:
- Mathematical statistics Statistics
- Resource Type:
- Video
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Video
The vast majority of our grid-scale storage of electricity uses this clever method. Electricity faces a fundamental problem that comes with pretty much any product that’s provided on-demand: our ability to generate large amounts of it doesn’t match up that closely with when we need it. The storage of electricity for later use, especially on a large scale, is quite challenging. That’s not to say that we don’t store energy at grid scale though, and there’s one type of storage that makes up the vast majority of our current capacity.
- Subjects:
- Environmental Engineering, Hydraulic Engineering, and Mechanical Engineering
- Keywords:
- Energy storage Water-power Pumped storage power plants
- Resource Type:
- Video
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Video
Wind can be one of the most critical and complicated loads on civil structures. The case of the Tacoma Narrows bridge is a well-known cautionary tale that’s discussed in engineering and physics classrooms across the world. Both resonance from vortex shedding and aeroelastic flutter contributed to the failure. When you push the envelope, you have to be vigilant because things that didn’t matter before start to become important (e.g. wind loads on lighter structures). Unanticipated challenges are a cost of innovation and that’s something that we can all keep in mind.
- Subjects:
- Structural Engineering
- Keywords:
- Washington (State) -- Tacoma -- Tacoma Narrows Bridge (1940) Suspension bridges Wind-pressure
- Resource Type:
- Video
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Video
Being diagnosed with autism is often seen as a tragedy. But for Jac den Houting, it was the best thing that's ever happened to them. As an autistic person, concepts like the Neurodiversity paradigm, the Social Model of Disability, and the Double Empathy Problem were life-changing for Jac. In this talk, Jac combines these ideas with their own personal story to explain why we need to rethink the way that we understand autism. Jac den Houting is a research psychologist and Autistic activist in pursuit of social justice. Jac currently holds the role of Postdoctoral Research Associate at Macquarie University in Sydney, working alongside Professor Liz Pellicano. In 2015, Jac was awarded an Autism CRC scholarship to complete their PhD through the Autism Centre of Excellence at Griffith University in Brisbane. Prior to this, they gained almost 10 years’ experience as a psychologist in the criminal justice system, with the Queensland Police Service and Queensland Corrective Services. Jac was identified as Autistic at the age of 25, and is proudly neurodivergent and queer. After participating in the inaugural Future Leaders Program at the 2013 Asia Pacific Autism Conference, Jac quickly became established as a strong advocate for the Autistic community. Jac is a current member of the Autistic Self Advocacy Network of Australia and New Zealand (ASAN-AuNZ)’s Executive Committee, the Autism CRC’s Data Access Committee, Aspect’s LGBTQIA+ Autism Advisory Committee, and the Aspect Advisory Council. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
- Course related:
- RS3320 Clinical Sciences in Developmental Dysfunction
- Subjects:
- Health Sciences
- Keywords:
- Autistic people Autism Autistic people -- Services for
- Resource Type:
- Video
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Video
Earthquakes have always been a terrifying phenomenon, and they’ve become more deadly as our cities have grown — with collapsing buildings posing one of the largest risks. But why do buildings collapse in an earthquake? And how can it be prevented? Vicki V. May explains the physics of why it is not the sturdiest buildings, but the smartest, that will remain standing.
- Subjects:
- Building and Real Estate and Disaster Control and Management
- Keywords:
- Building failures -- Prevention Earthquake resistant design Earthquake engineering Buildings -- Earthquake effects
- Resource Type:
- Video
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Video
This video shows how simple reinforcement is used to prevent collapse of rock tunnels. Tunnels play an important role in our constructed environment as passageways for mines, conveyance for utilities, and routes for transportation. Rock bolts are a type of reinforcement for stabilizing rock excavations, usually made from steel bars or bolts. This simple construction method dramatically reduces the cost of making tunnels through rock safe from collapse.
- Subjects:
- Structural Engineering
- Keywords:
- Underground construction Rock bolts Tunneling Tunnels
- Resource Type:
- Video
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Video
This video explains how GPS works, security issues of GPS, and why US military GPS can be made free for use.
- Subjects:
- Land Surveying and Geo-Informatics
- Keywords:
- Global Positioning System Artificial satellites in navigation
- Resource Type:
- Video
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Video
This video shows more destructive testing to answer your questions about concrete. Concrete's greatest weakness is its tensile strength, which can be less than 10% of its compressive strength. So, we often reinforce it to create a composite material strong against all types of stress. This video briefly touches on conventional rebar and prestressed/post-tensioned reinforcement.
- Subjects:
- Building and Real Estate
- Keywords:
- Reinforced concrete Concrete
- Resource Type:
- Video
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Video
This video discusses the topic of urban sprawl and the environmental and social impact if a city is expanding too fast
- Subjects:
- Building and Real Estate
- Keywords:
- Cities towns -- Growth Housing policy Buildings -- Height restrictions City planning
- Resource Type:
- Video
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Video
This video explains why ridges move, and other musings on thermal movement of large civil works. Most people have a certain intuition about thermal expansion, but you may not have considered how engineers design to accommodate it on large civil structures. The video gives a quick overview on this important consideration that engineers must account for when designing infrastructure like pipelines, bridges, and even sidewalks.
- Subjects:
- Structural Engineering
- Keywords:
- Structural analysis (Engineering) Expansion (Heat)
- Resource Type:
- Video
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Video
Architects, engineers and developers are creating increasingly greener structures - and doing it in a more literal way than ever before. This is what happens when trees meet buildings.
- Subjects:
- Environmental Engineering, Building Services Engineering, and Building and Real Estate
- Keywords:
- Buildings -- Energy conservation Roof gardening Sustainable buildings Sustainable construction Trees in cities
- Resource Type:
- Video
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Video
In this video, Mr Peter Sidorko, the University Librarian of the University of Hong Kong explain the importance of academic integrity. Students are expected to conduct themselves honesty and with integrity. One of the key responsibilities is to assure to credit the materials used to develop the ideas and academic work properly and avoid plagiarism.
- Keywords:
- Intellectual property Plagiarism Information literacy Academic writing
- Resource Type:
- Video
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Video
Chances are you'll need to find a scholarly journal article for a research paper or project in the near future. But, wait, what is a "scholarly journal article?" How is it different from a popular source like a newspaper or magazine article? Let's reduce the confusion on scholarly journal articles. Scholarly journals enable scholars -- experts in a particular academic field -- to communicate their research with other experts in that field through publishing articles and to stay current by reading about other scholars' work. Consequently, scholarly journals create a community of scholars who are all participating in a kind of "conversation" in that academic field. Rather than a face-to-face conversation, this is a formal conversation, which takes place over months and years through written documents. The most important part of this long term written conversation - what makes it a “scholarly” conversation, as opposed to popular - is what's called the “peer review process.” The peer review process works like this: in order for a scholar to get published in a scholarly journal, his or her expert peers must read their work and critique it. These “peer reviewers” make sure that the scholar has cited the appropriate experts in the discipline, made valid and well-supported arguments, and has written the article on a topic that is appropriate for that particular journal. This rigorous evaluation process ensures that scholarly work meets a higher standard than popular publications. So, why is this important for you? First, the information in a scholarly text has been rigorously evaluated, so it is more reliable and credible than information in popular sources. Second, reading scholarly journal articles for your papers or projects can give you insight into the ways of thinking of experts in that field. Finally, every scholarly text has extensive bibliographies that introduce you to important texts in the field, which can help you extend your research in that area. When you read the articles and books the scholar cited in her article, you are taking part in the scholarly conversation.
- Keywords:
- Scholarly periodicals Scholarly publishing
- 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
In many of the world’s tallest skyscrapers, there’s a secret device protecting the building and the people inside from strong motion due to wind and earthquakes. Did you know you can tune a skyscraper just like a guitar? In this video, we’re comparing theory to the real world for tuned mass dampers. Luckily this tech is simple enough that we can model it right in the garage. As silly as this little experiment looks, it’s actually not that far off from what engineers do in the real world (maybe without the googly eyes). The design phase for just about every major building includes some physical scale model tests. This video shows that the tuned mass damper is a great example of elegance in engineering.
- Subjects:
- Structural Engineering
- Keywords:
- Tuned mass dampers Buildings -- Earthquake effects Buildings -- Vibration
- 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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Video
Hydraulic transients (also known as water hammer) can seem innocuous in a residential setting, but these spikes in pressure can cause major damage to large pipelines and industrial pipe networks. In this video, we briefly discuss how water hammer occurs and how engineers mitigate the effect.
- Subjects:
- Building Services Engineering
- Keywords:
- Water hammer Hydraulic transients Fluid mechanics
- Resource Type:
- Video
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Video
A few things that can go very wrong when you put steam in a pipe. We talked about the damaging effects of water hammer, but there’s another state of H2O equally if not more dangerous when put in pipes. In this episode, we’re talking about steam hammer and differential shock.
- Subjects:
- Building Services Engineering
- Keywords:
- Piping Fluid dynamics Pipelines
- Resource Type:
- Video
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Video
What are solar cells, and how do they work? Find out more about solar power - and learn how this renewable resource harnesses the power of the sun into usable energy.
- Subjects:
- Environmental Engineering and Building Services Engineering
- Keywords:
- Solar energy Renewable energy sources Photovoltaic power generation
- Resource Type:
- Video
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Video
Sometimes conventional reinforcement isn't enough. The basics of prestressed concrete. Prestressing reinforcement doesn't necessarily make concrete stronger. But, it does increase the serviceability of concrete members by reducing the amount of deflection under load. This video explains the two most common types of prestressed concrete: pre-tensioned and post-tensioned. Prestressed concrete is used in all kinds of structures from bridges to buildings to silos and tanks. It’s a great way to minimize cracking and take fuller advantage of the incredible strength of reinforced concrete.
- Subjects:
- Building and Real Estate
- Keywords:
- Prestressed concrete Reinforced concrete
- Resource Type:
- Video
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Video
What's the difference between concrete and cement? Concrete is the most important construction material on earth and foundation of our modern society. At first glance it seems rudimentary, but there is a tremendous amount of complexity involved in every part of designing and placing concrete. This video is meant to be a bare-bones introduction to the topic, with a cool demonstration of concrete strength using a hydraulic press.
- Subjects:
- Building and Real Estate
- Keywords:
- Concrete Cement
- Resource Type:
- Video
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Video
This video shows the basics of fluid cavitation, including demonstration from AvE. If you subject a fluid to a sudden change in pressure, some interesting things can happen. You can cause tremendous damage to moving parts, or you can harness this destructive power in many beneficial ways.
- Keywords:
- Hydrodynamics Cavitation Fluid mechanics
- Resource Type:
- Video
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Video
Autism is a spectrum disorder which includes a large range of symptoms and behaviors. This video is part for Behavior Frontiers Applied Behavior Analysis (ABA) Training Program with an Autism Specialization. Available via web based training program or at seminars across the country.
- Course related:
- RS3320 Clinical Sciences in Developmental Dysfunction
- Subjects:
- Health Sciences
- Keywords:
- Autism
- Resource Type:
- Video
-
Video
This video shows a demonstration and brief explanation of air lock in fluid pipelines. If you assume that gasses don’t get into pipes or that they can’t constrict the flow, you might design a pipeline that doesn’t work. Luckily for engineers, this is a well-known phenomenon in pipe systems. It’s just one of the complexities that come with the job and we’ve come up a with a lot of creative ways to overcome it.
- Subjects:
- Building Services Engineering and Building and Real Estate
- Keywords:
- Fluid dynamics Pipelines
- Resource Type:
- Video
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Video
In general, and compared to other common building materials, metals have excellent mechanical properties. They are hard, tough, strong, and durable. As someone who occasionally works the wood, even I can admit that metals are a superior material in many regards. So you can see why it would be advantageous to have a way to connect them together, especially if you can do it in such a way that joint isn’t the weakest part of your assembly. That’s the goal of welding, and luckily, this is not something reserved for industrial factories and machine shops. From my own experiences so far, welding is something you might be able to do yourself as a hobby. And stay tuned till the end for some tips for getting started.
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Video
This video discusses a few modern techniques that help improve design life of concrete, including roller compacted concrete (RCC) and water reducing admixtures (superplasticizers). There are a whole host of differences between modern concrete and that of the western Roman empire that I didn’t have time to go into, including freeze/thaw damage.
- Subjects:
- Building and Real Estate
- Keywords:
- Concrete construction Roller compacted concrete Concrete -- Additives Concrete
- Resource Type:
- Video
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Video
A Virtual Reality introduction for Unity using HTC Vive for beginers. We will implement hand presence, teleportation and object grabbing in only 7 minutes without any line of code.
- Subjects:
- Interactive and Digital Media and Computing
- Keywords:
- Unity (Electronic resource) Computer simulation Virtual reality Human-computer interaction
- Resource Type:
- Video
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Video
About 10,000 years ago, hunter-gatherers, aided by rudimentary agriculture, moved to semi-permanent villages and never looked back. With further developments came food surpluses, leading to commerce, specialization and, many years later with the Industrial Revolution, the modern city. Vance Kite plots our urban past and how we can expect future cities to adapt to our growing populations.
- Subjects:
- Building Services Engineering and Building and Real Estate
- Keywords:
- Cities towns -- Growth City planning
- Resource Type:
- Video
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Video
A video explaining the physics of ultrasound and enhancing students' ultrasound knowledge. There are other more specific ultrasound training podcasts on the UltrasoundPod channel.
- Subjects:
- Medical Imaging
- Keywords:
- Diagnostic ultrasonic imaging Medical physics
- Resource Type:
- Video
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Video
In this video, the team won the best student poster award at the poster exhibition, and they are being invited to publish an exclusive feature story in the student e-newspaper. They want to use an infographic to help present their ideas and would like to extend their research to invite the interviewee to share their views on the topic.They are excited about writing for the student e-newspaper, and they are interested to know the ethical and legal issues around the use of information.
- Subjects:
- Statistics and Research Methods
- Keywords:
- Intellectual property Social sciences -- Research Communication in education Copyright
- Resource Type:
- Video
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Video
From self-healing asphalt to electrified roads, technology is steering the future of driving along some exciting new paths!
- Subjects:
- Electrical Engineering, Mechanical Engineering, and Transportation
- Keywords:
- Traffic safety Roads -- Technological innovations Automobile driving
- Resource Type:
- Video
-
Video
How do we discern what is true and what is ‘fake news’ in the fast-paced age of social media and technology? Our technology editor David Grossman reports.
- Subjects:
- Statistics and Research Methods
- Keywords:
- Digital media -- Moral ethical aspects Media literacy Social media Journalism -- Social aspects Fake news
- Resource Type:
- Video
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Video
Hydrogen fuel cell cars and lithium-ion battery powered cars, which is more energy efficient and cost effective? This video shows you some facts from perspectives of production, storage of fuels, and infrastructure set up for charging.
- Subjects:
- Electrical Engineering, Chemistry, Environmental Engineering, and Transportation
- Keywords:
- Hydrogen cars Hydrogen as fuel Electric vehicles Fuel cells Hydrogen -- Storage
- Resource Type:
- Video
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Video
A series of video that introduce various topics, including Node.js, Java, C programming, HTML, JavaScript, Python, PHP, and C++ programming.
- Subjects:
- Computing
- Keywords:
- Computer games -- Programming Computer programming Web sites -- Design Graphic arts Computer networks
- 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
-
Video
Earthquakes are almost impossible to predict. Luckily, engineers have come up with some amazing ways to protect people the next time one might strike.
- Subjects:
- Building and Real Estate and Disaster Control and Management
- Keywords:
- Building failures -- Prevention Earthquake resistant design Buildings -- Earthquake effects
- Resource Type:
- Video
-
Video
The video explains the major elements in the endocrine system and describes the hormones and actions of 10 glands: pineal, anterior pituitary, posterior pituitary, thyroid, parathyroid, pancreas, adrenal cortex, adrenal medulla, testes and ovaries.
- Subjects:
- Health Sciences
- Keywords:
- Endocrine gls
- Resource Type:
- Video
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Video
The video covered two questions: (1) Can journalists include other people's works in news articles? (2) When does the exception of criticism, review, and reporting current events apply? 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:
- Reporters reporting Copyright Fair use (Copyright)
- Resource Type:
- Video
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Video
The video covered two questions: (1) Can students include translations of other people's works in their research essays? (2) What should students be aware of when including images and videos online in their assessments or projects? 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:
- Copyright licenses Copyright infringement Copyright Fair use (Copyright)
- Resource Type:
- Video
-
Video
The video covered three questions: (1) Can songs or videos on online platforms (e.g. YouTube) be used freely? How do online platforms ensure copyright protection? (2) What are Creative Commons licences? How can a licensor set his/her licence conditions? (3) Do memes infringe any 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).
- Keywords:
- Copyright licenses Social media Copyright infringement Copyright
- Resource Type:
- Video
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Video
The video covered three questions: (1) Can cartoon images be printed on cushions? (2) Can song lyrics be printed on tote bags? (3) What are "pirated goods"? What are the consequences of selling them? 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:
- Copyright infringement Copyright
- Resource Type:
- Video
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Video
The video covered three questions: (1) What does "making an adaptation" mean? (2) What is "public domain"? (3) Does inclusion of a pop song in a performance infringe any 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).
- Keywords:
- Copyright -- Performing rights Copyright infringement Public domain Copyright
- Resource Type:
- Video
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Video
The video covered three questions: (1) Are ideas protected by copyright? (2) What is the difference between ideas and expressions? (3) Is making a 2D copy of a 3D work 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).
- Keywords:
- Copyright infringement Copyright -- Art Copyright
- Resource Type:
- Video
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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).
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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) 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 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
This video explores the challenges of self-driving cars and possible solutions to address the safety of self-driving technology.
- Subjects:
- Electrical Engineering, Mechanical Engineering, and Transportation
- Keywords:
- Automobiles -- Automatic control Automobile industry trade -- Technological innovations
- Resource Type:
- Video
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Video
In this lesson, we'll be looking at the cell cycle. This is the lifespan of a eukaryotic somatic cell. A somatic cell is any cell in the body of an organism, except for sex cells such as sperm and egg cells. The cell cycle describes the sequence of cell growth and division. A cell spends most of its life a state called interphase. Interphase has three phases, the G1, S, and G2 phases. Interphase is followed by cell division, which has one phase, the M phase. Together these four phases make up the entire cell cycle. G1 of interphase is sometimes called growth 1 or gap phase 1. In G1, a cell is busy growing and carrying out whatever function it's supposed to do. Note that some cells, such as muscle and nerve cells, exit the cell cycle after G1 because they do not divide again. A cell enters the S phase after it grows to the point where it's no longer able to function well and needs to divide. The S stands for synthesis, which means to make, because a copy of DNA is being made during this phase. Once DNA replication is complete, the cell enters the shortest and the last part of interphase called G2, also known as growth 2 or gap phase 2. Right now, it's enough to know that further preparations for cell division take place in the G2 phase. Now that interphase is over, the cell is ready for cell division, which happens in the M phase. The M phase has two events. The main one is mitosis, which is division of the cell's nucleus, followed by cytokinesis, a division of the cytoplasm. So, at the end of M phase, you have two daughter cells identical to each other and identical to the original cell. Let's review. The cell cycle describes the life cycle of an individual cell. It has four phases, three in interphase and one for cell division. Most cell growth and function happen during G1. The cell enters the S phase when it needs to divide. In this phase the cell replicates its DNA. Replication just means the cell makes a copy of its DNA. In G2, the cell undergoes further preparations for cell division. Finally, we have cell division in the M phase. The M phase consists of mitosis, which is nuclear division, and cytokinesis, or division of the cytoplasm. We'll explore the details of mitosis and cytokinesis separately
- Subjects:
- Biology
- Keywords:
- Cell cycle
- Resource Type:
- Video
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Video
Almost everyone agrees that flooding is bad. Most years it’s the number one natural disaster in the US by dollars of damage. So being able to characterize flood risks is a crucial job of civil engineers. Engineering hydrology has equal parts statistics and understanding how society treats risks. Water is incredibly important to us, and it shapes almost every facet of our lives, but it’s almost never in the right place at the right time. Sometimes there’s not enough, like in a drought or just an arid region, but we also need to be prepared for the times when there’s too much water, a flood. Rainfall and streamflow have tremendous variability and it’s the engineer’s job to characterize that so that we can make rational and intelligent decisions about how we develop the world around us.
- Subjects:
- Hydraulic Engineering and Disaster Control and Management
- Keywords:
- Floods Hydrology Flood control -- Management
- Resource Type:
- Video
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