Friday, November 16, 2007
Semantic web presentation Nov-7-2007
Semantic web presentation Nov-7-2007
Semantic Web Sig
Interaction Paradigms….
Talking about apps:
- Loopt
- Email
- Pandora
- Farecast
SRI virtual assistant:
CALO project…
(Darpa funded)
e.g. feature: CALO will transcribe a conference call automatically
Probabilistic consistency engine: predict what will happen in a meeting etc
Search assistant: learn the items are relevant over time from user search
(desktop search etc...)
Connect data on desktop etc with people in outlook contact list etc
Radar project also funded by DARPA
PARC: Magitti
Yahoo zonetags / zurfer
Tagmaps
collective contribution of flickr user uploads: figure out name etc of a place : Alcatraz, baseball...
upload demo: has 'zonetag guess' befoe uploading the pic (still click tw3ice to send the pic)
- list of stored tags that should apply to the pic upload (on phone)
- pull data from yahoo db for local venues etc (palo alto art center etc)
- show events around me ; restaurants
- upcoming rss feed
- Privacy info to be attached to pic for sharing (friends / family etc)
Zurfer: consume photos on phone
- nearby photos , recent comments on the pics etc
search for tag nearby: e.g. 'sad near me', 'interesting today'
- 'Fire-eagle' : new user location platform to read / write location for 3rd parties
- will be able to show it on website; also allow update thru SMS etc
PARC presentation: activity aware leisure guide
DNP (dai nippon printing co) project Magitti:
19-25 years have twice as much free time as other youth !
-local and localized info
- want to know what others think
User mobile with GPS: keeps on reading user presence info:
- what activity is user interested in (infer)
- Match in DB, present a list of possible activities
- Predict activity
- Location, preferences etc
DB: Activity - Venue - Weight
EAT straits cafe 0.77
Weighted according to user's preferences
- When no data avail; use prior population data
weekday vs weekend :
categories: see, eat out, shop etc
- Predict activities from sms messages
- Looked at public corpus of messages in univ: 11% contain something for leisure activities:
meet for dinner, watch movie etc
Demo on windows mobile device:
- Shows recommendations of intresting places ; MAP as a vertical bar on side (halfway out map... not covering the whole screen)
- expand on any recommendation; show picture of place if available
- compare quality: cheap restaurant for lunch, dinner more expensive
- adjust recommendations... when one dines etc
Twine presentation
Share knowledge / interests
knowledge management...
built on w3c standards (offshoot of calo project)
Person's twine: shared with different groups
ontology...
individuals and groups (twines) have email addresses
"Database , merged with a wiki"
new fields can be added by user
Semantic graph... every object has a type in graph : e.g. book, friend...
- figure out how connected I am to that object
- e.g. based upon interests, recommendations from trusted people
Automatic research in background finding matching stuff for me...
- can even disagree with individual's tag / recommendations !?
Friday, November 09, 2007
SIP servlet presentation by BEA: Nov 6th, 2007
SIP servlet programming model
SipServlet derives from GenericServlet…
Registrar., user agent, back-to-back user agent
Q: Who all supports SIP servlet apis ?
Q: Does spring work with these ?
Procedures as doInvite()… etc in SipServlet
Support for proxy; B2BUA etc
Create multiple sessions etc
Pattern matching specification for servlet mapping from requests
Convergence accomplished by linking http and sip sessions : use session variables to link the two manually
Packaging: SAR, WAR, EAR
Multiple applications can be composed: chained
Container challenges:
Carrier grade implementation
Hitless appl upgrade
No SPOF
Concurrency control and distributed (dead) locks
Protocol extensions all the time
http://www.bea.com/framework.jsp?CNT=index.htm&FP=/content/products/jrockit/
Container impl for BEA:
a) Load balancer (any)
b) Stateless engine nodes
c) Thruput scaling by adding engine nodes
Hash on call-id to partition calls to multiple groups
Replication of every state update
Real time garbage collection using jrockit: keep latency low
Multiple locking choices…CallState level locking, sipsession locking
HttpSession – Sipsession relation using appl programmers’ code
Locks with timeout to help here ….
Perf improvements: retransmission need to be handled (don’t redo if already in process)
JSR 116 till now…
Moving to JSR 289:
- new servlet dispatch mechanism (main-servlet)
- easy conference
- http convergence mechanism
-
SipServlet derives from GenericServlet…
Registrar., user agent, back-to-back user agent
Q: Who all supports SIP servlet apis ?
Q: Does spring work with these ?
Procedures as doInvite()… etc in SipServlet
Support for proxy; B2BUA etc
Create multiple sessions etc
Pattern matching specification for servlet mapping from requests
Convergence accomplished by linking http and sip sessions : use session variables to link the two manually
Packaging: SAR, WAR, EAR
Multiple applications can be composed: chained
Container challenges:
Carrier grade implementation
Hitless appl upgrade
No SPOF
Concurrency control and distributed (dead) locks
Protocol extensions all the time
http://www.bea.com/framework.jsp?CNT=index.htm&FP=/content/products/jrockit/
Container impl for BEA:
a) Load balancer (any)
b) Stateless engine nodes
c) Thruput scaling by adding engine nodes
Hash on call-id to partition calls to multiple groups
Replication of every state update
Real time garbage collection using jrockit: keep latency low
Multiple locking choices…CallState level locking, sipsession locking
HttpSession – Sipsession relation using appl programmers’ code
Locks with timeout to help here ….
Perf improvements: retransmission need to be handled (don’t redo if already in process)
JSR 116 till now…
Moving to JSR 289:
- new servlet dispatch mechanism (main-servlet)
- easy conference
- http convergence mechanism
-
Tuesday, July 18, 2006
Yahoo advertising targeting presentation July 18
Presented by Madhu Vudali as part of BI Sig:
Yahoo advertising:
Adv A:
- 100M impressions
- Y! Music
- US-IP, 18-34
- Aug1 – Sep 30
- Guaranteed (pay according to number of impressions only)
Adv B:
- 100M impressions
- Y! “run of network”
- “Autos behavior”
- Aug1- Sep 30
- Guaranteed
These two adv are competing for same pool potentially..
Classic example of airlines conflicts
Yield mgmt:
Right customer, right price etc…
- Perishable entry
- Reservation based
- Price discrimination: willingness to pay
- Prediction models : when to expect what traffic…
- Control of resource: lies with the seller here (serve in whatever order we want)
Pricing, Yield mgmt group for 4 years:
Pricing, inventory allocation etc.
Class 1 (guaranteed)
Class 2 (non guaranteed) : floor = min price to guarantee
Inventory not used by class 1 goes to class 2
Prices may change dynamically, but individual sales contracts are not affected / goodwill etc.
Impressions vs CPM (1 : 10)
Advertisers typically tell the total amount of dollars… number of impressions would be less or more
Segmentation
Endemic vs non endemic: e.g. movie sellers on yahoo movie: more efficient, cheaper than going on yahoo mail which could be provided
Brand marketers vs direct marketers : direct ones more price insensitive
Pricing:
= time of purchase
- length of campaign
- rich media
- delivery period : e.g. thanksgiving to Christmas period has higher base
Rapt application for pricing
Supply forecasting for:
- Seasonality
- Volatility
- Attributes of contents…..
Inventory pooling problem:
Probabilistic solutions to overlaps
Look at overbooking option:
Spoilage cost, overbooking cost
Ben Vinw or someone from Sabre… for pricing diagrams
Exception processing:
- Set a floor price: walkaway
o Sales reps can do anything above that, incentives for higher prices
Maximize ad campaign delivery as it is progressing; changing the placement etc.
- Prioritization:
o If probability of targeted consumer is low (rare), give that ad a priority over generic ones…
Yahoo advertising:
Adv A:
- 100M impressions
- Y! Music
- US-IP, 18-34
- Aug1 – Sep 30
- Guaranteed (pay according to number of impressions only)
Adv B:
- 100M impressions
- Y! “run of network”
- “Autos behavior”
- Aug1- Sep 30
- Guaranteed
These two adv are competing for same pool potentially..
Classic example of airlines conflicts
Yield mgmt:
Right customer, right price etc…
- Perishable entry
- Reservation based
- Price discrimination: willingness to pay
- Prediction models : when to expect what traffic…
- Control of resource: lies with the seller here (serve in whatever order we want)
Pricing, Yield mgmt group for 4 years:
Pricing, inventory allocation etc.
Class 1 (guaranteed)
Class 2 (non guaranteed) : floor = min price to guarantee
Inventory not used by class 1 goes to class 2
Prices may change dynamically, but individual sales contracts are not affected / goodwill etc.
Impressions vs CPM (1 : 10)
Advertisers typically tell the total amount of dollars… number of impressions would be less or more
Segmentation
Endemic vs non endemic: e.g. movie sellers on yahoo movie: more efficient, cheaper than going on yahoo mail which could be provided
Brand marketers vs direct marketers : direct ones more price insensitive
Pricing:
= time of purchase
- length of campaign
- rich media
- delivery period : e.g. thanksgiving to Christmas period has higher base
Rapt application for pricing
Supply forecasting for:
- Seasonality
- Volatility
- Attributes of contents…..
Inventory pooling problem:
Probabilistic solutions to overlaps
Look at overbooking option:
Spoilage cost, overbooking cost
Ben Vinw or someone from Sabre… for pricing diagrams
Exception processing:
- Set a floor price: walkaway
o Sales reps can do anything above that, incentives for higher prices
Maximize ad campaign delivery as it is progressing; changing the placement etc.
- Prioritization:
o If probability of targeted consumer is low (rare), give that ad a priority over generic ones…
Tuesday, May 30, 2006
Spring AOP Presentation 4 April 2006
A well done presentation describing the simplicity Spring brings to programming of J2EE apps, with focus on AOP.
Explained:
a) Dependency injection :
e.g. pass the external dependency object in the constructor of the class; this can let unit test happen in a simple way with mock implementation; another
Another example is 'setter' injection
b) Inversion of control framework:
IOC means "inversion of responsibility with regard to how an object obtains references to collaborating objects; Applying IoC, objects are given their dependencies at creation time by some external entity that coordinates each object in the system."
Spring provides construction, injection and lifecycle management for objects and their dependencies.
To achieve loose coupling between different objects / behaviors supported
Use of mock DAOs allows easy unit test with lose coupling
A few AOP concepts were revised...
All the aspects of the program and coupling: the intention is to do them inside the xml file.
The consultant referred to his website for examples discussion in talk:
http://www.carbonfive.com/community/download/springaop.zip
Few other points:
a) Sprint makes it much easier to work with hibernate with easy bootstrapping
b) Use of AOP allows declarative transaction mgmt
(Enclose function calls within transaction begin and transaction end)
Can describe in config file which methods need transaction support
e.g. use of "transaction interceptor"
Presentation was easy to follow with sequence diagrams of procedure calls
c) Security framework
Thread local info of user etc. for security
(More needed here)
d) Spring makes objects "Remoteable"
Overall very good presentation to go thru the concepts of the framework
http://www.springframework.org is another useful reference site
Explained:
a) Dependency injection :
e.g. pass the external dependency object in the constructor of the class; this can let unit test happen in a simple way with mock implementation; another
Another example is 'setter' injection
b) Inversion of control framework:
IOC means "inversion of responsibility with regard to how an object obtains references to collaborating objects; Applying IoC, objects are given their dependencies at creation time by some external entity that coordinates each object in the system."
Spring provides construction, injection and lifecycle management for objects and their dependencies.
To achieve loose coupling between different objects / behaviors supported
Use of mock DAOs allows easy unit test with lose coupling
A few AOP concepts were revised...
All the aspects of the program and coupling: the intention is to do them inside the xml file.
The consultant referred to his website for examples discussion in talk:
http://www.carbonfive.com/community/download/springaop.zip
Few other points:
a) Sprint makes it much easier to work with hibernate with easy bootstrapping
b) Use of AOP allows declarative transaction mgmt
(Enclose function calls within transaction begin and transaction end)
Can describe in config file which methods need transaction support
e.g. use of "transaction interceptor"
Presentation was easy to follow with sequence diagrams of procedure calls
c) Security framework
Thread local info of user etc. for security
(More needed here)
d) Spring makes objects "Remoteable"
Overall very good presentation to go thru the concepts of the framework
http://www.springframework.org is another useful reference site
Tuesday, January 24, 2006
Jan 24th salesforce.com web services presentation
The presentation focussed on app-exchange platform created by salesforce.com....
www.sforce.com provides free developer accounts, limiting the number of calls that can be made to the API.
Their basic demo was on how the web site can be used for applications much more than just CRM, and any business application could be written. The platform provides an easy way to prepare one's own custom database, provide 'SQL like' queries on it, and expose the fields in the web services APIs.
The site does have scaling issues related to queries, so only a subset of SQL is released; transaction commands such as 'UPDATE' are not available.
The big restriction currently is that application logic cannot sit inside sforce.com, the only piece there is table rows and a bit of metadate. Either a proxy server or the javascript code within the browser is supposed to do rest of the work.
(TBD: what other facilities does the platform provide ?
Lucky me: won a paypal USB flash drive :)
However they talked about roadmap and did talk about putting
www.sforce.com provides free developer accounts, limiting the number of calls that can be made to the API.
Their basic demo was on how the web site can be used for applications much more than just CRM, and any business application could be written. The platform provides an easy way to prepare one's own custom database, provide 'SQL like' queries on it, and expose the fields in the web services APIs.
The site does have scaling issues related to queries, so only a subset of SQL is released; transaction commands such as 'UPDATE' are not available.
The big restriction currently is that application logic cannot sit inside sforce.com, the only piece there is table rows and a bit of metadate. Either a proxy server or the javascript code within the browser is supposed to do rest of the work.
(TBD: what other facilities does the platform provide ?
Lucky me: won a paypal USB flash drive :)
However they talked about roadmap and did talk about putting
Tuesday, December 06, 2005
POJO + teracotta appl clustering implementation
Date: Dec 5th, 2005
2 presentations:
Pres1: By the author of POJOs in action, email address cer@acm.org
The author describes a lightweight framework using Spring and hibernate to put transaction mgmt, security and other enterprise capabilities to 'plain old java objects'.
The two alternative approaches are use of Spring vs use of EJB 3.0
JDO / Hibernate (persistence) => Spring => POJO
or JDO /Hibernate => EJB 3.0 => POJO
The author deprecated EJB 3.0 framework, claiming that use of JNDI in EJB for object lookups clutters the code badly and adds lot of dependencies.
Spring made heavy use of proxies instead (based upon AOP) to hide the ORM details from the user
The model appears as
Pres Tier ----> Transaction interceptor <==> Platform Trans mgr (Hibernate /JDO)
The author didn't appear very convincing in his argument, especially since EJB 3.0 is more popular and has fixed most of well known defects of EJB 2.0
-----
Teracotta presentation: more interesting part of talk
Talk Focussed on putting caching + clustering + replication / fault tolerance in your application in a transparent way
The talk first pointed out big issues with standard jcache style implementations. In a nutshell, the issues which teracotta framwork avoids is :
1. Page faults , responsibility of write through / write back caches to sync across cluster
2. Cache get/set operations do not preserve object references, causing lot of cache specific code to be written
3. All objects using cache have to be declared 'serializable'
Teracotta takes a radically different approach, based upon instrumentation of existing code instead. It can be thought of as 'specialized AOP' with declarative way of controlling the system caching.
Design: hub and spoke approach; object 'faulted' on demand into a cluster node
Failover planned in next release
2 presentations:
Pres1: By the author of POJOs in action, email address cer@acm.org
The author describes a lightweight framework using Spring and hibernate to put transaction mgmt, security and other enterprise capabilities to 'plain old java objects'.
The two alternative approaches are use of Spring vs use of EJB 3.0
JDO / Hibernate (persistence) => Spring => POJO
or JDO /Hibernate => EJB 3.0 => POJO
The author deprecated EJB 3.0 framework, claiming that use of JNDI in EJB for object lookups clutters the code badly and adds lot of dependencies.
Spring made heavy use of proxies instead (based upon AOP) to hide the ORM details from the user
The model appears as
Pres Tier ----> Transaction interceptor <==> Platform Trans mgr (Hibernate /JDO)
The author didn't appear very convincing in his argument, especially since EJB 3.0 is more popular and has fixed most of well known defects of EJB 2.0
-----
Teracotta presentation: more interesting part of talk
Talk Focussed on putting caching + clustering + replication / fault tolerance in your application in a transparent way
The talk first pointed out big issues with standard jcache style implementations. In a nutshell, the issues which teracotta framwork avoids is :
1. Page faults , responsibility of write through / write back caches to sync across cluster
2. Cache get/set operations do not preserve object references, causing lot of cache specific code to be written
3. All objects using cache have to be declared 'serializable'
Teracotta takes a radically different approach, based upon instrumentation of existing code instead. It can be thought of as 'specialized AOP' with declarative way of controlling the system caching.
Design: hub and spoke approach; object 'faulted' on demand into a cluster node
Failover planned in next release
Tuesday, September 27, 2005
yahoo widget presentation
Talk by Dan Theurer, Technical Evangelist at yahoo
Started with power of yahoo APIs of:
1. MAP : how one can overlay his/her application data on top of a yahoo map, embed those applications etc.
Also digressed to advantages of yahoo over google:
a) Yahoo does not limit the number of hits to a low level; instead 5000 queries a day or so
2. Yahoo music engine: access to music engine object model using javasrcript
3. Search API: advanced we interface
4. "Context analyisis" for yahoo searches
----
Konfabulator talk:
Control statements, UI controls, timers triggers framework, "widget convertor" to package zip file.
Way of arranging data under widgets: widget folder \WidgetName at the top level
"On load" trigger example was shown.
Also supports debug mode with tag; windows cosnole
Check http://www.widgetgallery.com
and
http://developer.yahoo.net/community
Started with power of yahoo APIs of:
1. MAP : how one can overlay his/her application data on top of a yahoo map, embed those applications etc.
Also digressed to advantages of yahoo over google:
a) Yahoo does not limit the number of hits to a low level; instead 5000 queries a day or so
2. Yahoo music engine: access to music engine object model using javasrcript
3. Search API: advanced we interface
4. "Context analyisis" for yahoo searches
----
Konfabulator talk:
Control statements, UI controls, timers triggers framework, "widget convertor" to package zip file.
Way of arranging data under widgets: widget folder \WidgetName at the top level
"On load" trigger example was shown.
Also supports debug mode with
Check http://www.widgetgallery.com
and
http://developer.yahoo.net/community
