SLAC Today is available online at:

In this issue:
KIPAC Researcher Finds Black Holes to be Green
Safety Today: ES&H Web-Based Training
Blogging: Cultural Phenomenon & Practical Communications Tool

SLAC Today

Tuesday - April 25, 2006

(Photo - NGC 4696)
This composite image of NGC 4696 shows a vast cloud of hot gas (red), surrounding high-energy bubbles 10,000 light years across (blue) on either side of the bright white area around the supermassive black hole.

KIPAC Researcher Finds Black Holes to be Green

Black holes are the most fuel efficient engines in the universe, according to a new study using NASA's Chandra X-ray Observatory. By making the first direct estimate of how efficient or "green" black holes are, this work gives insight into how black holes generate energy and affect their environment.

The new Chandra finding shows that most of the energy released by matter falling toward a supermassive black hole is in the form of high-energy jets traveling at near the speed of light away from the black hole. This is an important step in understanding how such jets can be launched from magnetized disks of gas near the event horizon of a black hole.

"Just as with cars, it's critical to know the fuel efficiency of black holes," said lead author Steve Allen of the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC). "Without this information, we cannot figure out what is going on under the hood, so to speak, or what the engine can do." Read more...

(Column - Safety Today)

ES&H Offers New
Web-Based Training

(Image - New website)

Last week, ES&H Training launched a new web-based training portal.

The benefits of web-based training include:
- Convenience. You can take this
 training at anytime, at SLAC, at
 home, or almost anywhere you
 have a computer with an internet
- Time-savings. No advanced
 scheduling is required.
- Automatic Updates. With our
 new Learning Management
 System (LMS), training records
 are entered into the training
 database automatically and

This new training system was developed in conjunction with SkillSoft Corporation, one of the largest providers of online training in the country. Initially, we are offering eleven important safety courses with more to be added as the program evolves (including SON, EOESH, and GERT). Some of the classes currently available are:
- Blood Borne Pathogens
- Hearing Conservation
- Lockout/Tagout
- Personal Protective Equipment
- Ladder Safety
- Slips, Trips, and Falls

To view a complete list of courses offered and to view log-in and system requirements, please see the ES&H Web-Based Training page.

Questions? Contact the ES&H Training Team.

WIS Seminar: Blogging

(Photo) Bloggers Elisa Camahort and Evelyn Rodriguez

Blogging is more than a teenage past time or techie tool. It crosses age, gender and interest boundaries and represents a positive evolutionary step in communications and culture. This afternoon's WIS lecture offers the opportunity to meet two premiere bloggers.

Elisa Camahort and Evelyn Rodriguez will present the WIS lecture "Blogging: Cultural Phenomenon & Practical Communications Tool" at noon today in Panofsky Auditorium.

Elisa Camahort is the co-founder of BlogHer LLC which is now the number one guide for women bloggers, and its initiatives include a blog network, online community, annual conference and consultancy arm.

Evelyn Rodriguez has been blogging (mainly at her "Crossroads Dispatches" blog) and advising clients on participatory, customer-centric marketing strategies using networked "social, conversational media" (blogs, wikis, RSS) for marketing and innovation since 2003. She views this work as stepping into another country with its own culture, language, nuances and values quite apart from broadcast media and interactive media.

More information...

Events (see all | submit)

Access (see all)

(see all | submit)

 Lab Announcements

Community Bulletin Board

News (see all | submit)

dividing line
(Office of Science/U.S. DOE Logo)

View online at