Showing titles in Computers & Technology
-
-
The New World on Mars
- What We Can Create on the Red Planet
- By: Robert Zubrin
- Narrated by: Lee Goettl
- Length: 8 hrs and 44 mins
- Unabridged
-
Overall
-
Performance
-
Story
Within a few years, humans will be able to voyage to Mars. SpaceX is at the forefront of companies already building fleets of spaceships to make interplanetary travel as affordable as Old-World passage to America – to the New World. We will settle the red planet, transforming its raw materials into resources and tackling the challenges that await us, creating a new frontier for humankind. Dr Robert Zubrin explains how populous Martian city-states will emerge, producing their own air, water, food, power and more. How they must be beautiful to attract settlers, and what that might look like.
-
-
Incredibly comprehensive!
- By Sam on 06-10-24
-
The New World on Mars
- What We Can Create on the Red Planet
- Narrated by: Lee Goettl
- Length: 8 hrs and 44 mins
- Release date: 15-08-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
AI and Machine Learning for Coders
- A Programmer's Guide to Artificial Intelligence
- By: Laurence Moroney
- Narrated by: Timothy Howard Jackson
- Length: 9 hrs and 17 mins
- Unabridged
-
Overall
-
Performance
-
Story
If you're looking to make a career move from programmer to AI specialist, this is the ideal place to start. Based on Laurence Moroney's extremely successful AI courses, this introductory book provides a hands-on, code-first approach to help you build confidence while you learn key topics.
-
AI and Machine Learning for Coders
- A Programmer's Guide to Artificial Intelligence
- Narrated by: Timothy Howard Jackson
- Length: 9 hrs and 17 mins
- Release date: 24-01-23
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £15.99 or 1 Credit
Sale price: £15.99 or 1 Credit
-
-
-
Fundamentals of Software Architecture
- An Engineering Approach
- By: Mark Richards, Neal Ford
- Narrated by: Benjamin Lange
- Length: 13 hrs and 10 mins
- Unabridged
-
Overall
-
Performance
-
Story
This book provides the first comprehensive overview of software architecture’s many aspects. Aspiring and existing architects alike will examine architectural characteristics, architectural patterns, component determination, diagramming and presenting architecture, evolutionary architecture, and many other topics. Mark Richards and Neal Ford—hands-on practitioners who have taught software architecture classes professionally for years—focus on architecture principles that apply across all technology stacks.
-
-
Good book for broadening knowledge
- By Amazon Customer on 30-04-22
-
Fundamentals of Software Architecture
- An Engineering Approach
- Narrated by: Benjamin Lange
- Length: 13 hrs and 10 mins
- Release date: 27-02-21
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £36.99 or 1 Credit
Sale price: £36.99 or 1 Credit
-
-
-
Our Next Reality
- How the AI-Powered Metaverse Will Reshape the World
- By: Alvin Wang Graylin, Louis Rosenberg, Neal Stephenson - foreword
- Narrated by: Ciaran Saward
- Length: 11 hrs and 30 mins
- Unabridged
-
Overall
-
Performance
-
Story
We are entering a new technological age in which artificial intelligence and immersive media will transform society at all levels. If managed well, this could unleash a new age of abundance. If managed poorly, this technological revolution could easily go astray, deeply compromising our privacy, autonomy, agency, and even our humanity. In Our Next Reality, two industry veterans provide a data-driven debate on whether the new world we're creating will be a technological utopia or an AI-powered dystopia and gives guidance on how to aim for the best future we can.
-
-
who's this for?
- By Sean Headley on 06-06-24
-
Our Next Reality
- How the AI-Powered Metaverse Will Reshape the World
- Narrated by: Ciaran Saward
- Length: 11 hrs and 30 mins
- Release date: 07-03-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
The Age of AI
- And Our Human Future
- By: Henry A Kissinger, Eric Schmidt, Daniel Huttenlocher
- Narrated by: Eric Pollins
- Length: 7 hrs and 13 mins
- Unabridged
-
Overall
-
Performance
-
Story
Artificial intelligence is transforming human society fundamentally and profoundly. Not since the Enlightenment and the Age of Reason have we changed how we approach knowledge, politics, economics, even warfare. Three of our most accomplished and deep thinkers come together to explore artificial intelligence (AI) and the way it is transforming human society - and what it means for us all.
-
-
Awful reader
- By Amazon Customer on 22-11-21
-
The Age of AI
- And Our Human Future
- Narrated by: Eric Pollins
- Length: 7 hrs and 13 mins
- Release date: 16-11-21
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
Understanding Software
- Max Kanat-Alexander on Simplicity, Coding, and How to Suck Less as a Programmer
- By: Max Kanat-Alexander
- Narrated by: Steve Menasche
- Length: 6 hrs and 4 mins
- Unabridged
-
Overall
-
Performance
-
Story
In Understanding Software, Max Kanat-Alexander, Technical Lead for Code Health at Google, shows you how to bring simplicity back to computer programming. Max explains to you why programmers suck, and how to suck less as a programmer. There's just too much complex stuff in the world. Complex stuff can't be used, and it breaks too easily. Complexity is stupid. Simplicity is smart.
-
-
Insightful
- By Anonymous User on 18-10-24
-
Understanding Software
- Max Kanat-Alexander on Simplicity, Coding, and How to Suck Less as a Programmer
- Narrated by: Steve Menasche
- Length: 6 hrs and 4 mins
- Release date: 28-06-19
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
The Printing Revolution in Early Modern Europe
- By: Elizabeth L. Eisenstein
- Narrated by: Jonathan Cox
- Length: 11 hrs and 25 mins
- Abridged
-
Overall
-
Performance
-
Story
In 1979, Elizabeth Eisenstein provided the first full-scale treatment of the 15th-century printing revolution in the West in her monumental two-volume work, The Printing Press as an Agent of Change. This abridged edition, after summarizing the initial changes introduced by the establishment of printing shops, goes on to discuss how printing challenged traditional institutions and affected three major cultural movements: the Renaissance, the Reformation, and the rise of modern science.
-
-
Not a great performance
- By Fb on 16-05-24
-
The Printing Revolution in Early Modern Europe
- Narrated by: Jonathan Cox
- Length: 11 hrs and 25 mins
- Release date: 18-05-21
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £29.99 or 1 Credit
Sale price: £29.99 or 1 Credit
-
-
-
The Trolls of Wall Street
- How the Outcasts and Insurgents Are Hacking the Markets
- By: Nathaniel Popper
- Narrated by: Robert Fass
- Length: 10 hrs and 37 mins
- Unabridged
-
Overall
-
Performance
-
Story
The dramatic story of an improbable gang of self-proclaimed “degenerates” who made WallStreetBets into a cultural movement that moved from the fringes of the internet to the center of Wall Street, upending the global financial markets and changing how an entire generation thinks about money, investing, and themselves.
-
The Trolls of Wall Street
- How the Outcasts and Insurgents Are Hacking the Markets
- Narrated by: Robert Fass
- Length: 10 hrs and 37 mins
- Release date: 11-06-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
There's a War Going On but No One Can See It
- By: Huib Modderkolk
- Narrated by: Omar Baroud
- Length: 8 hrs and 42 mins
- Unabridged
-
Overall
-
Performance
-
Story
Summer 2017: computer screens go blank in 150 countries. The NHS is so affected that hospitals can only take in patients for A&E. Ambulances are grounded. Computer screens turn on spontaneously and warnings appear. Employees who desperately pull the plugs are too late. Restarting is pointless; the computers are locked. And now the attackers ask each victim for money. This is hijack software. It is just one example of how vulnerable the digital world has made us.
-
-
learned so much
- By Caramelcow on 03-04-24
-
There's a War Going On but No One Can See It
- Narrated by: Omar Baroud
- Length: 8 hrs and 42 mins
- Release date: 02-09-21
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
Prompt Engineering and ChatGPT
- How to Easily 10X Your Productivity, Creativity, and Make More Money Without Working Harder
- By: Russel Grant
- Narrated by: Jeremy Diener
- Length: 3 hrs and 48 mins
- Unabridged
-
Overall
-
Performance
-
Story
This book is your key to leveraging ChatGPT effectively. Whether for career advancement, business enhancement, or personal growth, it provides actionable insights and strategies.
-
-
weak Content
- By Amazon Customer on 14-06-24
-
Prompt Engineering and ChatGPT
- How to Easily 10X Your Productivity, Creativity, and Make More Money Without Working Harder
- Narrated by: Jeremy Diener
- Length: 3 hrs and 48 mins
- Release date: 12-01-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £11.99 or 1 Credit
Sale price: £11.99 or 1 Credit
-
-
-
Deep Thinking
- Where Machine Intelligence Ends and Human Creativity Begins
- By: Garry Kasparov
- Narrated by: Bob Brown, Garry Kasparov
- Length: 9 hrs and 56 mins
- Unabridged
-
Overall
-
Performance
-
Story
Garry Kasparov gives his first public account of his landmark 1997 chess match with the IBM supercomputer Deep Blue and explains why, 20 years later, he's become convinced that artificial intelligence is good for humans. In May 1997, the world watched as Garry Kasparov, the greatest chess player in the world, was defeated for the first time by the IBM supercomputer Deep Blue. It was a watershed moment in the history of technology....
-
-
Nothing to do with AI, boring historical account of deep blue games
- By M Cave on 02-10-17
-
Deep Thinking
- Where Machine Intelligence Ends and Human Creativity Begins
- Narrated by: Bob Brown, Garry Kasparov
- Length: 9 hrs and 56 mins
- Release date: 02-05-17
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
CCNA Cisco Certified Network Associate
- A Practical Study Guide on Passing the Exam
- By: Jamie Murphy
- Narrated by: Tom Brooks
- Length: 5 hrs and 7 mins
- Unabridged
-
Overall
-
Performance
-
Story
Master the fundamentals of networking and confidently prepare for the Cisco Certified Network Associate (CCNA) exam with this comprehensive guide. This book equips you with the knowledge and skills required to excel in today's dynamic networking landscape.
-
-
Harnessing Network Power
- By Margret M. Weeks on 14-06-24
-
CCNA Cisco Certified Network Associate
- A Practical Study Guide on Passing the Exam
- Narrated by: Tom Brooks
- Length: 5 hrs and 7 mins
- Release date: 20-03-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £14.99 or 1 Credit
Sale price: £14.99 or 1 Credit
-
-
-
AWS Certified Solutions Architect Audio Crash Course
- By: AudioLearn Content Team
- Narrated by: Drew Hadwal
- Length: 8 hrs and 23 mins
- Unabridged
-
Overall
-
Performance
-
Story
AudioLearn Crash Courses presents AWS Certified Solutions Architect - Complete review for the Amazon Web Services Certified Solutions Architect - Associate certification exam! Developed by experienced technicians and professionally narrated for easy listening, this course is a valuable tool when preparing for your AWS Certified Solutions Architect - Associate Certification Exam. The audio is focused and high-yield, covering the most important topics you need to know to succeed on the test. The material is accurate, up-to-date, and broken down into bite-sized sections.
-
-
easy to follow as an audible book
- By Rizwan Ahmed on 29-08-23
-
AWS Certified Solutions Architect Audio Crash Course
- Narrated by: Drew Hadwal
- Series: Audio Crash Course Series, Book 31
- Length: 8 hrs and 23 mins
- Release date: 13-07-20
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £14.99 or 1 Credit
Sale price: £14.99 or 1 Credit
-
-
-
Reality+
- Virtual Worlds and the Problems of Philosophy
- By: David J. Chalmers
- Narrated by: Grant Cartwright
- Length: 17 hrs and 12 mins
- Unabridged
-
Overall
-
Performance
-
Story
In the coming decades, the technology that enables virtual and augmented reality will improve beyond recognition. Within a century, world-renowned philosopher David J. Chalmers predicts, we will have virtual worlds that are impossible to distinguish from non-virtual worlds. But is virtual reality just escapism? In a highly original work of 'technophilosophy', Chalmers argues categorically, no: virtual reality is genuine reality. Virtual worlds are not second-class worlds. We can live a meaningful life in virtual reality - and increasingly, we will.
-
-
Philosophical trailblazing
- By Anonymous User on 04-01-23
-
Reality+
- Virtual Worlds and the Problems of Philosophy
- Narrated by: Grant Cartwright
- Length: 17 hrs and 12 mins
- Release date: 25-01-22
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £16.99 or 1 Credit
Sale price: £16.99 or 1 Credit
-
-
-
Combatting Cyber Terrorism
- A Guide to Understanding the Cyber Threat Landscape and Incident Response Planning
- By: Richard Bingley
- Narrated by: Daniel Crespin
- Length: 6 hrs and 17 mins
- Unabridged
-
Overall
-
Performance
-
Story
This audiobook recounts case studies to show the types of threats we face and provides a comprehensive coverage of risk management tactics and strategies to protect yourself against such nefarious threat actors. These include key mitigation and controls for information security or security and HR-related professionals.
-
Combatting Cyber Terrorism
- A Guide to Understanding the Cyber Threat Landscape and Incident Response Planning
- Narrated by: Daniel Crespin
- Length: 6 hrs and 17 mins
- Release date: 04-11-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £14.99 or 1 Credit
Sale price: £14.99 or 1 Credit
-
-
-
When the Heavens Went on Sale
- The Misfits and Geniuses Racing to Put Space Within Reach
- By: Ashlee Vance
- Narrated by: Ashlee Vance, Robert Petkoff
- Length: 18 hrs and 19 mins
- Unabridged
-
Overall
-
Performance
-
Story
In 2008, Elon Musk's SpaceX became the first private company to build a low-cost rocket that could reach orbit. Suddenly Silicon Valley, not NASA, was the epicentre of the new Space Age. Start-ups and investors began to realise that the heavens - ungoverned and unregulated - were open for business. When the Heavens Went on Sale tells the remarkable, unfolding story of this frenzied race to control access to outer space. Ashlee Vance follows four pioneering companies - Astra, Firefly, Planet Labs and Rocket Lab - as they attempt to launch thousands of low-cost rockets and satellites into orbit.
-
-
Another slice of the space pie 👍
- By Neil on 19-07-23
-
When the Heavens Went on Sale
- The Misfits and Geniuses Racing to Put Space Within Reach
- Narrated by: Ashlee Vance, Robert Petkoff
- Length: 18 hrs and 19 mins
- Release date: 11-05-23
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £16.99 or 1 Credit
Sale price: £16.99 or 1 Credit
-
-
-
Unbound
- How Eight Technologies Made Us Human, Transformed Society, and Brought Our World to the Brink
- By: Richard L. Currier
- Narrated by: Noah Michael Levine
- Length: 10 hrs and 36 mins
- Unabridged
-
Overall
-
Performance
-
Story
Although we usually think of technology as something unique to modern times, our ancestors began to create the first technologies millions of years ago in the form of prehistoric tools and weapons. Over time, eight key technologies gradually freed us from the limitations of our animal origins.
-
-
I almost didn't listen to this
- By hellojoanie on 10-01-22
-
Unbound
- How Eight Technologies Made Us Human, Transformed Society, and Brought Our World to the Brink
- Narrated by: Noah Michael Levine
- Length: 10 hrs and 36 mins
- Release date: 23-11-15
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £18.99 or 1 Credit
Sale price: £18.99 or 1 Credit
-
-
-
Artificial Intelligence
- A Guide for Thinking Humans
- By: Melanie Mitchell
- Narrated by: Abby Craden, Melanie Mitchell, Tony Wolf
- Length: 9 hrs and 33 mins
- Unabridged
-
Overall
-
Performance
-
Story
In Artificial Intelligence, Mitchell turns to the most urgent questions concerning AI today: How intelligent - really - are the best AI programs? How do they work? What can they actually do, and when do they fail? How humanlike do we expect them to become, and how soon do we need to worry about them surpassing us? Along the way, she introduces the dominant methods of modern AI and machine learning, describing cutting-edge AI programs, their human inventors, and the historical lines of thought that led to recent achievements.
-
-
Book great, voice irritating
- By Amazon Customer on 18-10-23
-
Artificial Intelligence
- A Guide for Thinking Humans
- Narrated by: Abby Craden, Melanie Mitchell, Tony Wolf
- Length: 9 hrs and 33 mins
- Release date: 15-10-19
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
Playing with Reality
- How Games Shape Our World
- By: Kelly Clancy
- Narrated by: Patty Nieman
- Length: 11 hrs and 39 mins
- Unabridged
-
Overall
-
Performance
-
Story
PLAYING WITH REALITY explores the riveting history of games since the Enlightenment, weaving an unexpected path through military theory, biology, artificial intelligence, neuroscience, cognitive psychology, and the future of democracy. As neuroscientist and physicist Kelly Clancy shows us, games have been deeply intertwined with the arc of history. War games shaped the outcomes of real wars in nineteenth and twentieth century Europe. Game theory warped our understanding of human behavior and brought us to the brink of annihilation.
-
-
Brilliant sweep of the history of games
- By Amazon Customer on 16-09-24
-
Playing with Reality
- How Games Shape Our World
- Narrated by: Patty Nieman
- Length: 11 hrs and 39 mins
- Release date: 18-06-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-
-
-
Data Grab
- The New Colonialism of Big Tech and How to Fight Back
- By: Ulises A. Mejias, Nick Couldry
- Narrated by: Laurence Dobiesz
- Length: 9 hrs and 56 mins
- Unabridged
-
Overall
-
Performance
-
Story
Colonialism has not disappeared; it has taken a new form. In the new world order where data is the new oil, big Tech companies are grabbing our most basic natural resources - our data - exploiting our labour and connections, and repackaging our information to control our views, track our movements, record our conversations and discriminate against us. In this searing, cutting-edge guide, two leading global researchers and founders of the concept of data colonialism reveal how history can help us understand the emerging future - and how we can fight back.
-
Data Grab
- The New Colonialism of Big Tech and How to Fight Back
- Narrated by: Laurence Dobiesz
- Length: 9 hrs and 56 mins
- Release date: 08-02-24
- Language: English
Failed to add items
Sorry, we are unable to add the item because your shopping cart is already at capacity.Add to basket failed.
Please try again laterAdd to wishlist failed.
Please try again laterRemove from wishlist failed.
Please try again laterAdding to library failed
Please try againFollow podcast failed
Unfollow podcast failed
Regular price: £12.99 or 1 Credit
Sale price: £12.99 or 1 Credit
-