Poster Poster PresentationsPresentations

-preparing and -preparing and presenting at your presenting at your

best-best-

Malika BellMalika BellCfAOCfAO

Summer, Summer, 20062006

Why Posters?Why Posters? Enables your individual input to a Enables your individual input to a

conference or meetingconference or meeting Share your work Share your work NetworkNetwork Get feedback on your research Get feedback on your research Develop your experience Develop your experience

communicating in the communicating in the scientific/technological worldscientific/technological world

Get travel award for a conference Get travel award for a conference (travel free!!!)(travel free!!!)

A Successful A Successful Poster Poster

PresentationPresentation

Demonstrates Enthusiasm – The Presenter and the Poster By Itself -

Relevant to Audience – Do You Know Your Audience?

Visually Appealing, But Not Too Busy

Well Rehearsed

PresentationOrganized, Visually

and Logically

What Goes on a PosterWhat Goes on a Poster

Minimal WordsMinimal Words Introduction Introduction Abstract (optional)Abstract (optional) MethodsMethods ResultsResults Discussion or SummaryDiscussion or Summary AcknowledgementsAcknowledgements Your StyleYour Style

Standard FlowStandard Flow

Introduction

Acknowledgements

LayoutLayout

•Show them your story

•Visuals rather than words

•What if you’re not there to present it?

Keep it InterestingKeep it Interesting

Preparing YOUR PosterPreparing YOUR Poster

PreparatiPreparationon

Get Details From the Conference

Use Oral Presentatio

n Slides

Prioritize Information

Design Your Layout

Font and Poster SizeFont and Poster Size

Can you read it from 4 feet away?Can you read it from 4 feet away? SuggestionsSuggestions

• Basic font and symbols Basic font and symbols • Titles: 90 pt Titles: 90 pt • Sub titles: 72 ptSub titles: 72 pt• Other poster content: 18-20ptOther poster content: 18-20pt• NEVER smaller than 14 pointNEVER smaller than 14 point

Ask conference people about sizeAsk conference people about size

What size should my poster be?

Setting Up the Poster Slide

• Create a New PPT File - choose "blank presentation" upon opening program, or use "File" menu and choose "New..."

• Page Setup - choose "Page Setup..." in "File" menu

• Page Setup Dialog Box - set as below...

"custom"

48" = 4 feet

36" = 3 feet

don't worry about

Page Settings

Notice that you are only looking at a 11% zoom of your poster

This one slide is 3' X 4'

You Now Have a Presentation with 1 Very Big Slide !!

You Now Have a Presentation with 1 Very Big Slide !!

Looking at Your Poster Slide

Stellar Population Evolution in Early-type GalaxiesJ.M.Holt, Dept. of Physics, University of California, Santa Cruz

AbstractGalaxies are complex systems that contain stars and gas. The easiest galaxies to model are early-type galaxies, which have elliptical shapes, smooth images, and are gas-poor. In this project, high-resolution images of galaxies taken with the Hubble Space Telescope are used to estimate how much early-type galaxies have changed in the last 7 billion years. This corresponds to the last half age of the Universe. As one looks back in space and time, stellar populations of galaxies should be younger and should contain more short-lived, luminous stars that have since disappeared. The total amount of light emitted by an object over its area is called “the surface brightness,” a quantity that for galaxies is independent of the distance but evolves with time. Surface brightnesses for a small sample of early-type galaxies will be measured, and the expectation is that in the past, these surface brightness were higher than at present.

The Hertzsprung-Russell diagram is a plot of stellar luminosity vs. temperature. The diagram above shows the evolutionary track of a star. The most massive stars have the most fuel but they also use it up faster. Thus, they leave the main sequence sooner than lower mass stars and eventually burn themselves out. This means that high surface brightness in a galaxy is a good indicator that its stellar population is young. I compared the surface brightness of local galaxies to that of galaxies at very large distances when their stellar populations were younger.

Goals•Compare young galaxies to present day galaxies.

•Verify that galaxies in the past were brighter than present day galaxies.

•Model how the stellar populations in galaxies change with time.

•Find out when galaxies formed their stars.

Conclusions•The Size vs. Magnitude plot at left shows that galaxies at high redshift are brighter by about 1.5 mag. This means that 7 billion years ago galaxies were four times more luminous than today.•A Single stellar population model (lower left) shows that galaxies formed their stars around 9.5 billion years ago. This means that at the epoch that we observe them the stellar populations were about 2.5 billion years old.

Galaxies at z~1 are brighter

AcknowledgementsI would like to thank Prof. Sandy Faber for sharing her expertise, Dr. Christopher Willmer donating his time and talents to explain every step. Thanks to BenWeiner for help with population models and everyone at CfAO. This work has been funded by the National Science Foundation under Grant No. AST 00-71198.

Best fit is at z=1.65

Hertzsprung-Russell diagram Findings

Size vs. Magnitude

Single Stellar Population Model

MIRROR ALIGNMENT USING DUAL BEAM LASERMIRROR ALIGNMENT USING DUAL BEAM LASERVinya Agluba, Smithsonian Astrophysical Observatory, Submillimeter Array, Hilo, HI

SMA Optics LayoutSMA Optics Layout

170mm

MethodsMethods

A 6-meter diameter paraboloidal primary reflector is combined with a 350 mm diameter hyperboloidal sub reflector. Mirrors M3 through M6 form a beam waveguide which directs the beam from the antenna vertically downward into the receiver optics assembly.

The goal of this project is to assemble a portable setup that would align the sub reflector and the beam waveguide mirrors.

To align the mirrors, a dual beam laser is used. Because there are visible red beams at each end of the laser that are aligned to each other, it feasible to place this laser between mirrors M4 and M5 since there is a lot of space for the laser and a focal point is located. The mount for the laser is kinematic, it can be adjusted by its x-y-z axis and angle.

M4

170mm

M5

Align Mirrors

Reduce Losses

Achieve Maximum Efficiency

-due to: beam truncation, distortion at focusing mirrors, and absorption and reflection at windows and mirrors

230GHz – 0.7-0.8

345GHz – 0.55-0.65

690GHz – 0.4

Since it would be hard for us to look for the laser beam propagated on the sub reflector, a video camera is installed on the vertex of the reflector.

Mirror M4 is an ellipsoidal mirror. If the laser beam strikes this mirror, the beam would disperse. So, an aperture stop is placed after M4 to block the dispersion and still have a fine beam going to the sub reflector.

The DS9 program is used to measure the amount of displacement of the laser beam on the sub reflector from the center as the antenna moves from different elevation.

First TrialFirst Trial

One end of the dual laser is placed right on the focal point of mirror M4, which is 170mm high from the 4-5-6 plate to assure that the laser beam passes this critical point.

Looking on the sub reflector, the laser beam is off the center and as the elevation of the antenna changes, it moved by 1-3 pixels. The laser beam on the sub reflector is still dispersed even though an aperture stop is already placed because the mirror M3 is too dusty that it had contributed to the dispersion of the laser beam.

Antenna elevation: 20° Antenna elevation: 70°

Second TrialSecond TrialInstead of positioning the laser 170mm high from the 4-5-6 plate, the laser is placed such that the laser beam strikes the center of mirrors M4 and M6. Crosshairs are placed across the mirrors to show the center of the mirrors.

Looking again at the sub reflector, the laser beam is off the center at an antenna elevation of 15°. But as the antenna elevation increases, the laser beam disappears as shown in the picture above with an elevation of 85°. This proves that the laser beam does not pass through the focal point (the laser beam was higher than 170mm) and thus, beam truncation could have occurred.

Antenna elevation: 15° Antenna elevation: 85°

ConclusionConclusionA portable setup is built to align the mirrors of the Submillimeter Array optics. It must be noted that the laser beam should pass through the focal point of mirror M4 so there would be no beam truncation that would occur. To assure the 170mm height, targets like shown on the picture on the left could be placed on both ends of the laser and one target is positioned right where the focal point is located.

Acknowledgments:Acknowledgments: •Rob Christensen, Research Supervisor•SMA Staff•Sarah Anderson, Malika Bell and Lisa Hunter, Center for Adaptive Optics•University of Hawaii - Manoa

This project is supported by the National Science Foundation Science and Technology Center for Adaptive Optics, managed by the University of California at Santa Cruz under cooperative agreement No. AST - 9876783.

Presenting Your PosterPresenting Your Poster Prepare and Prepare and

Rehearse 3-5 Rehearse 3-5 Minute TalkMinute Talk

Don’t RambleDon’t Ramble Avoid ReadingAvoid Reading Enhance What is Enhance What is

Already WrittenAlready Written Dress to ImpressDress to Impress Bring Resume or Bring Resume or

Business CardsBusiness Cards

Your Poster at SACNASYour Poster at SACNAS

You never know You never know who you will meet!who you will meet!

We’ll be there to We’ll be there to support yousupport you

Graduate school Graduate school and industry and industry representative to representative to meetmeet

Poster Contest Poster Contest Winner $500Winner $500

Poster Making TimelinePoster Making TimelineFor Hawaii IslandFor Hawaii Island

July 5July 5Poster

Presentation During Weekly Meeting July 10July 10

Mini Poster Outline Due

July 12July 12Go Over Poster OutlinesDuring Meeting July 26July 26

Work on Final Posters Due at End

of Day

Mini Poster OutlineMini Poster Outline

Due next weeks meetingDue next weeks meeting Sketch out the topics you’ll coverSketch out the topics you’ll cover Determine what existing slides you’ll Determine what existing slides you’ll

useuse Play around with formatting so we Play around with formatting so we

can answer questions next weekcan answer questions next week