Synchronous Rectification for Forward Converters_SMappus_June 4 2010Steve Mappus
油
This document summarizes techniques for improving the efficiency of power converters by replacing diode rectifiers with synchronous rectifiers (SRs) using MOSFETs. SRs can reduce conduction losses by lowering the equivalent forward voltage drop compared to diodes. However, SRs introduce additional losses related to their body diode and switching operation that must be minimized through proper gate driving and timing. Integrating a Schottky diode with the SR MOSFET in a single package helps reduce body diode losses and reverse recovery effects. Optimizing the gate driving method and timing is critical for SR performance in forward converters.
The document appears to be a presentation about Oracle's R technologies and how they address challenges with the R programming language. It discusses Oracle R Distribution, Oracle R Enterprise, Oracle R Advanced Analytics for Hadoop, and ROracle. It also covers how Oracle has added capabilities for embedded R execution in the Oracle Database using SQL, including functions like rqEval and rqScriptCreate that allow running R scripts and accessing database contents directly from R.
Este documento presenta una sesi坦n sobre aspectos legales de los datos abiertos. Su objetivo es capacitar a los participantes sobre las normas y referentes legales de los datos abiertos. Introduce conceptos como la metodolog鱈a ODI, regulaciones europeas y estatales sobre acceso a la informaci坦n p炭blica y reutilizaci坦n de datos, y aspectos b叩sicos como definiciones, l鱈mites y 辿tica de los datos abiertos. Adem叩s, analiza casos pr叩cticos como el portal de transparencia del gobierno estatal.
Machine Learning Real Life Applications By Examples - Mario CartiaData Driven Innovation
油
Durante il talk verranno illustrati 3 casi d'uso reali di utilizzo del machine learning da parte delle maggiori piattaforme web (Google, Facebook, Amazon, Twitter, PayPal) per l'implementazione di particolari features. Per ciascun esempio verr spiegato l'algoritmo utilizzato mostrando come realizzare le medesime funzionalit attraverso l'utilizzo di Apache Spark MLlib e del linguaggio Scala.
La Presentaci坦n 'La Mujer en el Sector TIC', por Benigno Lacort, Director General, AMETIC, fue compartida el 29 de Marzo de 2017 en el Seminario organizado por el Instituto de la Mujer y para la Igualdad de Oportunidades.
Deep Dive on Amazon S3 - March 2017 AWS Online Tech TalksAmazon Web Services
油
Learn about new and existing Amazon S3 features that can help you better protect your data, save on cost, and improve usability, security, and performance. We will cover a wide variety of Amazon S3 features and go into depth on several newer features with configuration and code snippets, so you can apply the learnings on to your object storage workloads.
Learning Objectives:
Review best practices for to reduce costs, protect against data loss, and increase performance in Amazon S3
Learn about new S3 storage management features that help you align storage with business needs
Understand data security capabilities available in S3 that help protect against malicious or accidental deletion or other data loss
Log Analytics with Amazon Elasticsearch Service and Amazon Kinesis - March 20...Amazon Web Services
油
Log analytics is a common big data use case that allows you to analyze log data from websites, mobile devices, servers, sensors, and more for a wide variety of applications including digital marketing, application monitoring, fraud detection, ad tech, gaming, and IoT. In this tech talk, we will walk you step-by-step through the process of building an end-to-end analytics solution that ingests, transforms, and loads streaming data using Amazon Kinesis Firehose, Amazon Kinesis Analytics and AWS Lambda. The processed data will be saved to an Amazon Elasticsearch Service cluster, and we will use Kibana to visualize the data in near real-time.
Learning Objectives:
1. Reference architecture for building a complete log analytics solution
2. Overview of the services used and how they fit together
3. Best practices for log analytics implementation
Say No Thank You to the PowerPoint Thank You 際際滷24際際滷s
油
This document provides tips for concluding a presentation effectively. It recommends ending with an impactful last slide like a summary, discussion starter, call to action, or story rather than just saying "thank you." The last slide and words should leave the audience wanting more and reinforce the main message. Ending with energy and enthusiasm is also important even if the presenter is tired. The conclusion is the last impression and only chance to impact the audience so it merits careful consideration.
Loki: An Opensource Zipkin/Prometheus Mashup written in Go.Weaveworks
油
Loki is a prototype OpenTracing implementation written in Go thats takes the Prometheus service-discovery and pull based approach to distributed tracing.
Nanotechnology involves manipulating matter at the nanoscale, which is approximately 1 to 100 nanometers. It has applications in many areas such as medicine, energy, and computing. Some advantages of nanotechnology include materials that are stronger, lighter, cheaper, and more precise. However, there are also concerns about potential negative health effects and how nanotechnology could enable new types of weapons.
This document provides a top 10 list of tips for creating effective presentations. The tips include structuring the presentation for clarity even if it's not aesthetically pleasing, limiting each slide to one main thought, using visual tools like pictures and gestures to enhance understanding, paying attention to proportions, and avoiding certain slide navigation arrows. The document is authored by Alexei Kapterev and it provides his contact information.
This document raises questions about whether people care if machines know all of their personal information, if other people's machines have access to their private data, and if other individuals' machines can surpass their own abilities or that of an entire team.
This document provides an overview of nanotechnology. It defines nanotechnology as the study and engineering of matter at the nanoscale, or atomic level. The document outlines the history of nanotechnology from its conception in 1959 to modern applications. Key tools used in nanotechnology like atomic force microscopes and carbon nanotubes are described. The document also discusses different approaches (top-down vs bottom-up), materials used, and applications of nanotechnology in areas like drugs, fabrics, electronics, and computers. It provides examples of how nanotechnology is enhancing performance in these domains.
Major hotel chains will focus less on amenities like TVs and phones in 2015, instead prioritizing free high-speed WiFi. Hotel occupancy is reaching new heights, causing room rates to rise, so hotels will emphasize savings opportunities. Travelers can expect to see more bundled packages that combine flights, rooms, and car rentals to provide affordable options. Emerging technologies like smartphone room keys and wearable devices will continue changing the travel experience.
Eco-nomics, The hidden costs of consumptionJosh Beatty
油
Joe, an average consumer, spends $25,000 annually on goods and consumes $100,000 worth of natural resources, but he only pays the direct retail costs and is unaware of the various hidden environmental, health, and security costs associated with production and transportation. These hidden costswhich include pollution cleanup, resource depletion, subsidies, and climate change impactsadd up to over $1 trillion annually for U.S. consumers. The document urges people to reduce their consumption, support sustainable businesses, and make more informed choices to limit these hidden costs that will otherwise be passed on to future generations.
This document provides a summary of common mistakes in PowerPoint presentation design and tips to avoid them. It identifies the top 5 mistakes as including putting too much information on slides, not using enough visuals, using poor quality visuals, having a disorganized "visual vomit" style, and lack of preparation. The document emphasizes telling a story over slide design, using whitespace on slides, consistent formatting, and spending significant time preparing presentations.
What Would Steve Do? 10 Lessons from the World's Most Captivating PresentersHubSpot
油
The document provides 10 tips for creating captivating presentations based on lessons from famous presenters like Steve Jobs, Scott Harrison, and Gary Vaynerchuk. The tips include crafting an emotional story with a beginning, middle, and end; creating slides that answer why the audience should care, how it will improve their lives, and what they must do; using simple language without jargon; using metaphors; ditching bullet points; showing rather than just telling through images; rehearsing extensively; and that excellence requires hard work with no shortcuts.
Today we all live and work in the Internet Century, where technology is roiling the business landscape, and the pace of change is only accelerating.
In their new book How Google Works, Google Executive Chairman and ex-CEO Eric Schmidt and former SVP of Products Jonathan Rosenberg share the lessons they learned over the course of a decade running Google.
Covering topics including corporate culture, strategy, talent, decision-making, communication, innovation, and dealing with disruption, the authors illustrate management maxims with numerous insider anecdotes from Googles history.
In an era when everything is speeding up, the best way for businesses to succeed is to attract smart-creative people and give them an environment where they can thrive at scale. How Google Works is a new book that explains how to do just that.
This is a visual preview of How Google Works. You can pick up a copy of the book at www.howgoogleworks.net
Machine Learning Real Life Applications By Examples - Mario CartiaData Driven Innovation
油
Durante il talk verranno illustrati 3 casi d'uso reali di utilizzo del machine learning da parte delle maggiori piattaforme web (Google, Facebook, Amazon, Twitter, PayPal) per l'implementazione di particolari features. Per ciascun esempio verr spiegato l'algoritmo utilizzato mostrando come realizzare le medesime funzionalit attraverso l'utilizzo di Apache Spark MLlib e del linguaggio Scala.
La Presentaci坦n 'La Mujer en el Sector TIC', por Benigno Lacort, Director General, AMETIC, fue compartida el 29 de Marzo de 2017 en el Seminario organizado por el Instituto de la Mujer y para la Igualdad de Oportunidades.
Deep Dive on Amazon S3 - March 2017 AWS Online Tech TalksAmazon Web Services
油
Learn about new and existing Amazon S3 features that can help you better protect your data, save on cost, and improve usability, security, and performance. We will cover a wide variety of Amazon S3 features and go into depth on several newer features with configuration and code snippets, so you can apply the learnings on to your object storage workloads.
Learning Objectives:
Review best practices for to reduce costs, protect against data loss, and increase performance in Amazon S3
Learn about new S3 storage management features that help you align storage with business needs
Understand data security capabilities available in S3 that help protect against malicious or accidental deletion or other data loss
Log Analytics with Amazon Elasticsearch Service and Amazon Kinesis - March 20...Amazon Web Services
油
Log analytics is a common big data use case that allows you to analyze log data from websites, mobile devices, servers, sensors, and more for a wide variety of applications including digital marketing, application monitoring, fraud detection, ad tech, gaming, and IoT. In this tech talk, we will walk you step-by-step through the process of building an end-to-end analytics solution that ingests, transforms, and loads streaming data using Amazon Kinesis Firehose, Amazon Kinesis Analytics and AWS Lambda. The processed data will be saved to an Amazon Elasticsearch Service cluster, and we will use Kibana to visualize the data in near real-time.
Learning Objectives:
1. Reference architecture for building a complete log analytics solution
2. Overview of the services used and how they fit together
3. Best practices for log analytics implementation
Say No Thank You to the PowerPoint Thank You 際際滷24際際滷s
油
This document provides tips for concluding a presentation effectively. It recommends ending with an impactful last slide like a summary, discussion starter, call to action, or story rather than just saying "thank you." The last slide and words should leave the audience wanting more and reinforce the main message. Ending with energy and enthusiasm is also important even if the presenter is tired. The conclusion is the last impression and only chance to impact the audience so it merits careful consideration.
Loki: An Opensource Zipkin/Prometheus Mashup written in Go.Weaveworks
油
Loki is a prototype OpenTracing implementation written in Go thats takes the Prometheus service-discovery and pull based approach to distributed tracing.
Nanotechnology involves manipulating matter at the nanoscale, which is approximately 1 to 100 nanometers. It has applications in many areas such as medicine, energy, and computing. Some advantages of nanotechnology include materials that are stronger, lighter, cheaper, and more precise. However, there are also concerns about potential negative health effects and how nanotechnology could enable new types of weapons.
This document provides a top 10 list of tips for creating effective presentations. The tips include structuring the presentation for clarity even if it's not aesthetically pleasing, limiting each slide to one main thought, using visual tools like pictures and gestures to enhance understanding, paying attention to proportions, and avoiding certain slide navigation arrows. The document is authored by Alexei Kapterev and it provides his contact information.
This document raises questions about whether people care if machines know all of their personal information, if other people's machines have access to their private data, and if other individuals' machines can surpass their own abilities or that of an entire team.
This document provides an overview of nanotechnology. It defines nanotechnology as the study and engineering of matter at the nanoscale, or atomic level. The document outlines the history of nanotechnology from its conception in 1959 to modern applications. Key tools used in nanotechnology like atomic force microscopes and carbon nanotubes are described. The document also discusses different approaches (top-down vs bottom-up), materials used, and applications of nanotechnology in areas like drugs, fabrics, electronics, and computers. It provides examples of how nanotechnology is enhancing performance in these domains.
Major hotel chains will focus less on amenities like TVs and phones in 2015, instead prioritizing free high-speed WiFi. Hotel occupancy is reaching new heights, causing room rates to rise, so hotels will emphasize savings opportunities. Travelers can expect to see more bundled packages that combine flights, rooms, and car rentals to provide affordable options. Emerging technologies like smartphone room keys and wearable devices will continue changing the travel experience.
Eco-nomics, The hidden costs of consumptionJosh Beatty
油
Joe, an average consumer, spends $25,000 annually on goods and consumes $100,000 worth of natural resources, but he only pays the direct retail costs and is unaware of the various hidden environmental, health, and security costs associated with production and transportation. These hidden costswhich include pollution cleanup, resource depletion, subsidies, and climate change impactsadd up to over $1 trillion annually for U.S. consumers. The document urges people to reduce their consumption, support sustainable businesses, and make more informed choices to limit these hidden costs that will otherwise be passed on to future generations.
This document provides a summary of common mistakes in PowerPoint presentation design and tips to avoid them. It identifies the top 5 mistakes as including putting too much information on slides, not using enough visuals, using poor quality visuals, having a disorganized "visual vomit" style, and lack of preparation. The document emphasizes telling a story over slide design, using whitespace on slides, consistent formatting, and spending significant time preparing presentations.
What Would Steve Do? 10 Lessons from the World's Most Captivating PresentersHubSpot
油
The document provides 10 tips for creating captivating presentations based on lessons from famous presenters like Steve Jobs, Scott Harrison, and Gary Vaynerchuk. The tips include crafting an emotional story with a beginning, middle, and end; creating slides that answer why the audience should care, how it will improve their lives, and what they must do; using simple language without jargon; using metaphors; ditching bullet points; showing rather than just telling through images; rehearsing extensively; and that excellence requires hard work with no shortcuts.
Today we all live and work in the Internet Century, where technology is roiling the business landscape, and the pace of change is only accelerating.
In their new book How Google Works, Google Executive Chairman and ex-CEO Eric Schmidt and former SVP of Products Jonathan Rosenberg share the lessons they learned over the course of a decade running Google.
Covering topics including corporate culture, strategy, talent, decision-making, communication, innovation, and dealing with disruption, the authors illustrate management maxims with numerous insider anecdotes from Googles history.
In an era when everything is speeding up, the best way for businesses to succeed is to attract smart-creative people and give them an environment where they can thrive at scale. How Google Works is a new book that explains how to do just that.
This is a visual preview of How Google Works. You can pick up a copy of the book at www.howgoogleworks.net
1. The document discusses IBM's big data platform called B.I.G for establishing an information strategy in the era of big data.
2. It explains that big data presents new business opportunities but also challenges around volume, velocity, variety and veracity of data that require new technologies for flexible and scalable analysis of all available information.
3. IBM's B.I.G platform provides core big data technologies as well as information integration and governance capabilities to enable trusted and improved business value from big data analytics.
This document discusses trends in TV technology, including smart TVs, OLED TVs, 3D TVs, and UHD TVs. It provides an overview of each technology and how it has evolved over time. For example, it describes how smart TVs now offer internet connectivity and content options beyond traditional TV viewing. It also explains the picture quality advantages of OLED displays over LED displays.
1. The document discusses robot technology and summarizes examples of robots from various applications including military, rescue, entertainment, service, wearable, emotion, bio, surgical, and capsule robots.
2. It then focuses on humanoid robots including KAIST's HUBO series and describes the development of DRC-Hubo for the DARPA Robotics Challenge including mechanical design improvements and capability demonstrations.
3. The challenges of developing intelligent service robots that can operate in unstructured environments with both autonomy and mobility are discussed. Convergence with other technologies like brain-machine interfaces will be needed.
This document summarizes 3D printing technology and its applications. It discusses the history and development of 3D printing, as well as different 3D printing processes like stereolithography, fused deposition modeling, and multi-jet fusion. Applications mentioned include prototypes, medical models, aerospace and automotive parts. The document also analyzes market trends, showing that the 3D printing market is growing and expanding into new fields beyond prototyping.
1. Seoul National University
覦 譴蟲
碁蟲 蠍郁概覿 覦
NSI_NCRC, Seoul National University
www. nsi.snu.ac.kr
Where the nanoscience and nanotechnology become reality
危, 蠏碁Μ螻 瑚骸蠍一
讌 AMP 2013
3. Seoul National University
語危(一 覯豺)
F = E TS
- Free energy: 讌
-E: 螻 豌 讌 覿覲
- S: 碁 豕螳 襦 覲(Uni direction)
讌蟲 螻螳
- 讌螳 螻糾, F螳 讀螳(覈 豢)
4. Seoul National University
Energy and Power(讌 覲語危)
Power consumption():
Energy:
蠍壱 ; 1eV
: 1 Calorie =4200 J =1.167 W-h
蠍郁, 覓朱Μ :
1J= 0.000277778 W-h
(1kg 1m 讌蟲 伎襴 讌 =9.8J)
1 watt is approximately 3.41214 BTU/h;
4
5. Seoul National University
Human( Life )
Number of Cells: 10 trillion and 100 trillion (10-100譟)
Daily calorie consumption per day:1200 calories for women, and
1800 calories for men =2.1kW-h
~0.1kW
1 pW : average power consumption of a human cell
But your brain power =20W/1000cm**2
~2% of weight, consumes 20% of energy
0.4-4 nW :roughly 1010 chemical reactions per second
Pentium =100W /1cm**2
100W/1G ~ 100 nW
5
6. Seoul National University
10n Prefix
1024 Yotta
1021 Zetta
1018 Exa
1015 Peta
1012 Tera
109 Giga
106 Mega
103 Kilo
102 Hector
101 Deca, Deka
100 (none)
1024 Yocto
1021 Zepto
1018 Atto
1015 Femto
1012 Pico
109 Nano
106 Micro
103 Milli
102 Centi
101 Deci
100 (none)
6
10讌覯
- Magic number 3 vs. 4( 蠏碁Μ螻 0.33333)
7. Seoul National University
Energy and Power
讌蟲襦 る 讌: 180,000T W
瑚 讌 (15 TW)
瑚 覈語 讌(0.7TW)
蟲 覦~0.1TW
7
X(1/10000)
X(1/20)
X(1/10)
Human is Energy Amplifier x20
8. Seoul National University
覓手骸 覓 危(覓殊)
60 GaJ hectare/1 year (600 kJ m)=> 540% energy return
8
(CH2O)
n
CO2
讌
Fast process
Slow
process
10. Seoul National University
覲 語危
1 語危 る 覲企
5 Exabytes (billion gigabytes) to 2000AD + 487 Exabytes 2000-2009AD
+ 2500 Exabytes/yr by 2012
Cycle of the big data is the challenge of the IT industry in 10 years
15. Seoul National University 15Seoul National University
-豺: 襯 譬 (轟 讌螳 )
(H2 O: O 朱 襯 譬 )
-螳讌 覓殊企 (H2, O)
- 螳讌 るジ 覓殊 襷覃 瑚(H2, O)襯 襷
瑚: 螳 覓殊 企ゼ 讌
16. Seoul National University 16Seoul National University
Recent work from Richard SayKally's laboratory show
s that the hydrogen bonds in liquid water break and r
e-form so rapidly (often in distorted configurations) t
hat the liquid can be regarded as a continuous netw
ork of hydrogen-bonded molecules
覓: 一 蟆壱
-
+
22. Seoul National University 22
-PN diode
Seoul National University
N region P region
るジ 覓殊(P, N) 伎, 豺 るゴ蟆
23. Seoul National University
Solar Cell and LED
Efficiency
=Light observed
* # of e h pairs
* e h to electrodes safely
Efficiency
=e h from electrodes
* # of e h pairs
recombined
* light safely out
25. Seoul National University
Red blood cells
(~7-8 mm)
Head of a pin
1-2 mm
Human hair
~ 60-120 mm wide
Ant
~ 5 mm
Dust mite
200 mm
~10 nm diameter
Nanotube electrode
Carbon nanotube
~1.3 nm diameter
Microworld
0.1 nm
1 nanometer (nm)
0.01 mm
10 nm
0.1 mm
100 nm
1 micrometer (mm)
0.01 mm
10 mm
0.1 mm
100 mm
1 millimeter
(mm)
1 cm
10 mm
10-2
m
10-3
m
10-4
m
10-5
m
10-6
m
10-7
m
10-8
m
10-9
m
10-10
m
Visible
Nanoworld 1,000 nanometers =
InfraredUltravioletMicrowaveSoftx-ray
1,000,000 nanometers =
Zone plate x-ray lens
Outer ring spacing ~35 nm
MicroElectroMechanica
l (MEMS) devices
10 -100 mm wide
Red blood
cells
Pollen grain
Carbon
buckyball
~1 nm
diameter
DNA
~2-1/2 nm diameter
Modified from Source: DOE, USA
Top
Down
Bottom
up
25
一 襯 伎; m 覿 nano蟾讌襯 蟲
32. Seoul National University 32
覈 觜: 蟆壱(Hydrogen bonding)
A hydrogen bond is the electromagnetic attractive interaction between polar molecules in
which hydrogen (H) is bound to a highly electronegative atom, such as nitrogen (N), oxygen
(O) or fluorine (F). The name hydrogen bond is something of a misnomer, as it should not be
confused with a covalent bond. It is not a true bond but a particularly strong dipole-dipole
force.(Wikipedia)
34. Seoul National University
覦煙 襷覯
The 留-Subunit of the Stimulatory G-Protein (Gs) Activates Adenylate
Cyclase
Neurotransmitter,Response,Sleep,Pain/Addiction,Reward