I’ve always been fascinated by fractals, especially the Sierpinski gasket, shown at right, and in a beautiful pyramidal arrangement in the background of this spread. To make such a gasket, all you do is remove the interior of the middle equilateral triangle (the upside down one) over and over again, at successively smaller and smaller scales. What results is something that is more than one dimensional, but less than two dimensional—in fact, it can be shown to have dimension D, where D is given by the relation 2D=3, or D ≈ 1.585…. In this issue of TPT, we feature on page 410 a paper by Charles Creffield, “Fractals on a Benchtop: Observing Fractal Dimension in a Resistor Network,” where he details how his students set up resistors in a similar network and mimic fractal resistance effects … doubly fascinating! I wanted to share this imagery with you in appreciation of the hundreds of generous, smart, and gracious individuals who serve as TPT referees. When I look over this list of names, I see many of the people I admire most in the world, and it makes me optimistic in a way that few things can these days. If you see someone you know in this list, please find a way to express your thanks for all they do for TPT and for physics teachers and students everywhere. When I imagine all the connections between the people on this list, it calls to my mind all of the connections between the dark regions in the figure at right—a Sierpinski gasket of physicists, held together by their common ideas. What could be more fun to think about!? Thank you, again, dear referees; you are the glue that holds this community together, in my view.

I’ve always been fascinated by fractals, especially the Sierpinski gasket, shown at right, and in a beautiful pyramidal arrangement in the background of this spread. To make such a gasket, all you do is remove the interior of the middle equilateral triangle (the upside down one) over and over again, at successively smaller and smaller scales. What results is something that is more than one dimensional, but less than two dimensional—in fact, it can be shown to have dimension D, where D is given by the relation 2D=3, or D ≈ 1.585…. In this issue of TPT, we feature on page 410 a paper by Charles Creffield, “Fractals on a Benchtop: Observing Fractal Dimension in a Resistor Network,” where he details how his students set up resistors in a similar network and mimic fractal resistance effects … doubly fascinating! I wanted to share this imagery with you in appreciation of the hundreds of generous, smart, and gracious individuals who serve as TPT referees. When I look over this list of names, I see many of the people I admire most in the world, and it makes me optimistic in a way that few things can these days. If you see someone you know in this list, please find a way to express your thanks for all they do for TPT and for physics teachers and students everywhere. When I imagine all the connections between the people on this list, it calls to my mind all of the connections between the dark regions in the figure at right—a Sierpinski gasket of physicists, held together by their common ideas. What could be more fun to think about!? Thank you, again, dear referees; you are the glue that holds this community together, in my view.

• David S. Abbott

• Paulo H. Acioli

• Andrei Afanasev

• Joseph C. Amato

• Barbara Andereck

• Eric Anderson

• Stuart Anderson

• Andrés Aragoneses

• Seth Ashman

• Timothy James Atherton

• Leslie Atkins Elliott

• Robert Andreas Austin

• Eric Ayars

• Janelle M. Bailey

• William H. Baird

• Blane Baker

• Jorge Luis Ballester

• Richard P. Barber

• Mauricio Barbi

• Bree Barnett Dreyfuss

• Regina Barrier

• Igor Barsukov

• William Bassichis

• Alan Bates

• Sebastian Becker

• Ernest R. Behringer

• Joanna Behrman

• Fred Behroozi

• Michael Scott Bell

• Keith Bellof

• Gregory A. Benesh

• Jonathan Bennett

• Tom Bensky

• Sean J. Bentley

• Rhoda Berenson

• Calvin Berggren

• Keith Berland

• Oscar Bertran

• Ugo Besson

• Shayak Bhattacharjee

• Gábor Bihari

• Philippe M. Binder

• Steven Binz

• Ignacio Birriel

• Jennifer J. Birriel

• David Bittel

• Philip Rodriguez Blanco

• Jake Stanley Bobowski

• Abigail Bogdan

• Roeland Boot

• Daniel Borrero-

• Echeverry

• Derrick Ernest Boucher

• Andrew Boudreaux

• Jonathan Bougie

• Michael Braunstein

• Bob Brazzle

• Michael S. Briggs

• Joel Bryan

• Louis Buchholtz

• Mark Buesing

• Andy Buffler

• James Buick

• John B. Buncher

• Alex Burant

• Juan R. Burciaga

• Jan-Philipp Burde

• Eric W. Burkholder

• Teresa Burns

• Andrea Bussani

• Tony Calamai

• Kristine Callan

• Sara Callori

• Jared Phelps Canright

• Isidora Caprile

• Richard L. Cardenas

• Duncan Carlsmith

• Ryan Carroll

• Ashley Carter

• Thomas Carter

• Paulo Simeão Carvalho

• Fausto Casaburo

• Giovanni Casini

• Dan Caton

• Craig Caylor

• Phillip Cervantes

• Jeff Chamberlain

• Sayan Chandra

• Amtul Mujeeb Chaudry

• Alex Chediak

• Mary K. Chessey

• Christopher J. Chiaverina

• Siu A. Chin

• Jacquelyn J. Chini

• Cory W. Christenson

• Wolfgang Christian

• Christopher Frank Chyba

• Xabier Cid Vidal

• Jim Braun Clarage

• Shannon Clardy

• Hunter G. Close

• Geraldine Cochran

• Ricardo Coelho

• Giuseppe Colicchia

• Charles Collett

• Eva-Maria Collins

• Neil Francis Comins

• Tom Concannon

• Cristiano M. B. Cordeiro

• Sean M. Cordry

• Christian Corrao

• Ivan F. Costa

• Laurent Courbin

• Charles Creffield

• Rod Cross

• Frederico Alan de Oliveira Cruz

• Michele D’Anna

• Brian D’Urso

• Robert Dalling

• Ann Daniel

• Marta L. Dark

• James Day

• Roberto De Luca

• Elida De Obaldia

• William DeGraffenreid

• Christos Deligkaris

• Glenda Denicolo

• Mark Denny

• Matthew Dew

• Alan DeWeerd

• Eric R. Dietz

• Gregory A. DiLisi

• Lin Ding

• Jennifer Docktor

• William Halsted Donahue

• Darsa Donelan

• David Donnelly

• Lucio Strazzabosco Dorneles

• Remy Dou

• Danny Doucette

• Benjamin William Dreyfus

• David Joel Drosdoff

• Michael Dubson

• Scott C. Dudley

• John Dumar

• Marcelo Dumas Hahn

• David H. Dunlap

• Leos Dvorak

• Joshua Dyer

• Don Easton

• Eric M. Edlund

• Ira Mark Egdall

• Mark Eichenlaub

• Arthur Eisenkraft

• Andrew R. Elby

• Marshall Ellenstein

• Paul Emigh

• Jeffrey Emmert

• Paula Vetter Engelhardt

• Lars Q. English

• Francisco Esquembre

• Eugenia Etkina

• Benjamin Evans

• Cathy Mariotti Ezrailson

• Carol Fabby

• Hasan Fakhruddin

• Charles M. Falco

• Kathleen Falconer

• Daniel Farias

• David A. Faux

• Klebert Feitosa

• Bernard Feldman

• Gerald Feldman

• Richard Fitzpatrick

• Kurtis A. Fletcher

• Eduardo V. Flores

• Kenneth W. Ford

• Lewis L. Ford

• Theodore Foster

• Michael Fowler

• Claudia Fracchiolla

• Joel Franklin

• Scott Franklin

• Walter Freeman

• James K. Freericks

• Marc Frodyma

• Josh Fuchs

• Christopher Fuse

• Gonzalo Fuster

• David G. Haase

• Calin Galeriu

• Michael R. Gallis

• Ross Galloway

• Cynthia Galovich

• Enrique J. Galvez

• Punit Gandhi

• Peter Garik

• Wayne P. Garver

• Andrew Gavrin

• Julio Gea-Banacloche

• Alina Gearba-Sell

• Benjamin D. Geller

• Elizabeth A. George

• Thomas F. George

• Tim Gfroerer

• Edw S. Ginsberg

• Alexander Goessling

• John Eric Goff

• Ersin Gogus

• Jesse Goldman

• Andres Gomberoff

• Anura Goonewardene

• Chris Gosling

• Noah Graham

• Christopher M. Graney

• Bor Gregorcic

• David Griffiths

• Jeffrey R. Groff

• Joshua Grossman

• Ildefonso Guilaran

• Ross Gunderson

• Siming Guo

• Matthew Warren Guthrie

• William W. Hackborn

• Kenneth D. Hahn

• Thomas Hall

• Ari Hämäläinen

• Paul C. Hamerski

• David Hammer

• Benedikt Harrer

• Nathan Harshman

• Francis X. Hart

• Beverly Hartline

• Brian David Hartman

• J. E. Hasbun

• Elvedin Hasovic

• John Michael Hauptman

• Eric Hazlett

• Eugene Hecht

• André Heck

• Jack G. Hehn

• Thomas Hemmick

• Rachel Henderson

• Andrzej Herczynski

• Rhett B. Herman

• Jessica Hernandez

• David Herrick

• Paul Hess

• Paul Hewitt

• James Hicks

• Melissa Hicks

• Robert C. Hilborn

• Eric Hill

• Don Hillger

• Peter F. Hinrichsen

• Andrew S. Hirsch

• Robert Hobbs

• David Hobill

• Barbara Maria Hoeling

• N. G. Holmes

• Judy Hopp

• Art Hovey

• Daniel Howard

• John A. Howell

• Ruth H. Howes

• Leonardo Hsu

• Ifan Glyndwr Hughes

• Michael M. Hull

• Andrew Theodore Hyman

• S. S. R. Inbanathan

• Paul William Irving

• Joshua Isaacson

• David P. Jackson

• Ewald Janssens

• John W. Jewett Jr.

• Dyan Jones

• William Francis Junkin

• Taylor Kaar

• Petr Kácovský

• David Kagan

• Michael Kagan

• Calvin S. Kalman

• Martin J. Kamela

• Stephen E. Kanim

• Sebastian Kapp

• Andreas Kaps

• Ricardo Karam

• Dileep Karanth

• Oleg Kargaltsev

• David Owen Kashinski

• Richard Dana Kaufman

• Savinder Kaur

• Philip Keller

• Eric Kincanon

• Evelyn Kinzel

• Michaela Kleinert

• Kathleen Koenig

• Patrick B. Kohl

• Gerd Kortemeyer

• Andrzej Kotlicki

• Minjoon Kouh

• Joseph F. Kozminski

• Richard Joseph Krantz

• Dennis Krause

• Joel David Krehbiel

• Mila Kryjevskaia

• Dennis E. Kuhl

• Jochen Kuhn

• Bethany Cobb Kung

• Douglas A. Kurtze

• Mickey Kutzner

• Munho Kwon

• Shawn Laatsch

• William Brian Lane

• Amanda Lannan

• Daniel Laumann

• Christopher Martin Lavelle

• Timothy M. Lawlor

• Gabriel Le Doudic

• Armand Le Noxaïc

• Kaelyn Leake

• Louis Leblond

• Kevin Lee

• Paul Lee

• Scott Lee

• Harvey S. Leff

• Susan Y. Lehman

• Don S. Lemons

• Bryan Leonard

• Zachary H. Levine

• Bruce W. Liby

• Jerome Licini

• Martin Lieberherr

• Michael Liebl

• Martha Lietz

• Christopher Like

• Hong Lin

• Don Lincoln

• James Lincoln

• Trevor C. Lipscombe

• Joshua Littleton

• Fabrizio Logiurato

• Vjera Lopac

• Dany Lopez

• Diana Berenice Lopez Tavares

• Michael C. LoPresto

• Ian Lovatt

• Matt Lowry

• Milentije Lukovic

• Dan MacIsaac

• Jill A. Macko

• Ponn Maheswar- anathan

• Mohamed Anis Maize

• John Mallinckrodt

• A. James Mallmann

• Kathy Malone

• Karl C. Mamola

• Harry Manos

• Daniel Keith Marble

• Arturo Carlos Marti

• Brian Martin

• Jeffrey D. Marx

• Bruce A. Mason

• Mark F. Masters

• Mark E. Mattson

• Leon Nathaniel Maurer

• Shannon K. Mayer

• Krista K. McBride

• Lowell McCann

• Michael Paul McCaughey

• Steve McCauley

• Stacy McCormack- Hootman

• Michael McCracken

• James Mcdonald

• Gordon McIntosh

• David H. McIntyre

• James G. McLean

• Steven Mellema

• David Elliott Meltzer

• Avraham Merzel

• Donna Messina

• James Robert Metz

• Pavlos Mihas

• Kelly Miller

• Kurtz K. Miller

• John A. Milsom

• Leonid Minkin

• Brandon J. Mitchell

• Pitam Mitra

• Mary Mogge

• Pirooz Mohazzabi

• Michael J. Moloney

• David Montalvo

• Martín Monteiro

• Nathan Moore

• Thomas A. Moore

• Thomas R. Moore

• Andrew C. H. Morrison

• Robert A. Morse

• Saeed Mosh- feghyeganeh

• Antonio Angel Moya

• Rainer Mueller

• Donna Mullenax

• Carl Edward Mungan

• Thomas Murphy Jr.

• Clifton Murray

• Jaclyn Kuspiel Murray

• Paul Nachman

• Hiroko Nakahara

• Christopher Naka- mura

• Paul Andrew Nakroshis

• Alan M. Nathan

• Jane and Jim Nelson

• William M. Nelson

• Dwight E. Neuenschwander

• Wendy Nielsen

• Timothy Niiler

• Jayson Micheal Nissen

• Hideo Nitta

• Paul Nord

• Daniel Joseph O’Brien

• Wolfgang Oehme

• Yasuo Ogawara

• Hans Ohanian

• Ryan Olf

• Keith Oliver

• Thomas Olsen

• Alexis Olsho

• Donald W. Olson

• Fatih Önder

• Kelly O’Shea

• James Overduin

• Mark Paetkau

• Wyatt Page

• William D. Parker

• Beth Parks

• Jay M. Pasachoff

• Shirish Rajan Pathare

• Michael Paukov

• Nelson Wilbur Pech- May

• Ann-Marie Pendrill

• Germano Maioli Penello

• Kerstin Perez

• Jonathan Perry

• Kenneth A. Pestka II

• Randy Peterson

• Sarah Phan-Budd

• Unofre Balug Pili

• A. I. Pinchuk

• Johanna Pirker

• Suwan Plaipichit

• Gorazd Planinšič

• Nicolas Plihon

• Thomas Plotz

• Robert Polak

• Nikola Poljak

• Christopher Porter

• Gesche Pospiech

• Richard H. Price

• Chokchai Puttharugsa

• Katherine Rainey

• V. V. Raman

• Everett Ramer

• Gordon Ramsey

• A. R. P. Rau

• James Reardon

• Jose Arnaldo Redinz

• Mark E. Reeves

• Gary Reich

• Daniel L. Reinholz

• Andrew Resnick

• Williams Jonata Miranda Ribeiro

• Arlisa Richardson

• Derek Richardson

• Amy D. Robertson

• David Robertson

• Alma Robinson

• Andrew Robinson

• Juan Rodriguez

• Roberto Rojas

• Alberto G. Rojo

• Mark F. Roll

• Chris Rorres

• Katemari Rosa

• David Rosengrant

• Tommaso Rosi

• Bahram Roughani

• Barbara Rovšek

• Arunava Roy

• Armando Rua

• Scott Rubin

• Marianna Ruggerio

• Michael J. Ruiz

• Mark Rupright

• James C. Sanders

• Justin M. Sanders

• Wayne Mark Saslow

• Vashti Sawtelle

• Lee Sawyer

• Erin Scanlon

• Beth Ann Schaefer

• Britt Scharringhausen

• Kent Scheller

• Rachel E. Scherr

• Axel Schmidt

• Daniel V. Schroeder

• Tina Schulze

• Daniel Schumayer

• Brian Schwartz

• Alan Scott

• Carolyn Sealfon

• David Sederberg

• Lane H. Seeley

• Matthew Richard Semak

• Said Shakerin

• Asif Shakur

• John Shaw

• Peter Sheldon

• Bruce Sherwood

• Steve Shropshire

• Kendra Sibbernsen

• David Lee Sidebottom

• Peter B. Siegel

• Daniel Edward Sikes

• Arnold E. Sikkema

• Donald Eugene Simanek

• Chandralekha Singh

• Vandana Singh

• Douglas Alexander Singleton

• Chris Sirola

• Jonathan R. Skuza

• William V. Slaton

• Jan Slegr

• David P. Smith

• Donald A. Smith

• Emma Smith

• Trevor I. Smith

• Winthrop W. Smith

• David R. Sokoloff

• Andrzej Sokolowski

• Mark Somers

• Patricia Soto

• Kevork Spartalian

• Geoff Spedding

• Benjamin T. Spike

• Amy VanEngen Spivey

• Sebastian Staacks

• Frank Stallmach

• Jared Stang

• Cecilia Stari

• Michael Lee Steib

• Keith Stein

• Leo C. Stein

• Tim Stelzer

• MacKenzie Richard Stetzer

• John Charles Stewart

• Dale Stille

• Steve Stonebraker

• Jefferson Streepey

• William Mark Stuckey

• David Sturm

• Isaiah Sumner

• Wenqing Sun

• M. Qasim Syed

• Randall Tagg

• Rex Taibu

• Bernard Tan

• Mark P. Taylor

• Richelle Teeling- Smith

• Raluca Elena Teodorescu

• Florian Theilmann

• Marshall Thomsen

• Todd K. Timberlake

• Roger G. Tobin

• Nathan Tompkins

• Daniel G. Tonn

• Daniela Topasna

• Kenneth W. Trantham

• Joseph Jude Trout

• Karl Patrick Trout

• Yau-Jong Twu

• Malte S. Ubben

• Bret Underwood

• Trai Unyapoti

• Ed van den Berg

• Alexander van der Horst

• Ben Van Dusen

• Stephen Van Hook

• Jean-Francois Simon Van Huele

• Paul van Kampen

• Kurt Vandervoort

• Joshua Veazey

• Ann M. Viano

• Rebecca E.Vieyra

• Artur Batista Vilar

• Abraham Vilchis

• Dwight Vincent

• Renante Violanda

• Epifanio Guido Virga

• Chris Vuille

• Shannon Wachowski

• Kasey Wagoner

• Farooq Wahab

• Wojciech J. Walecki

• Jearl D. Walker

• John R. Walkup

• Colin Scott Wallace

• C. Wesley Walter

• Paul J. Walter

• Yong Wang

• Bianca Watzka

• Kris Wedding Crowell

• William M. Wehrbein

• Jennifer Weinberg- Wolf

• Gary J. Weisel

• James Wells

• Brian Welsch

• Andrea Jayne Welsh

• Mark Welter

• Chris Wentworth

• Chris West

• Kyle White

• Susan White

• Brooke A. Whitworth

• Surawut Wicharn

• Carl Wieman

• Richard J. Wiener

• Matthew Wiesner

• Bethany R. Wilcox

• Darren M. Williams

• Jeremiah D. Williams

• Karen Williams

• Quinton L. Williams

• Shannon D. Willoughby

• Marcus Wilson

• David C. Wirth

• Salome Woerner

• Steven Frederick Wolf

• Richard Wolfson

• Michael Herbert Wood

• Monika Wood

• Deonna Woolard

• Rand S. Worland

• C. H. Wörner

• Huiling Xu

• Chuck Yeung

• Dylan Yost

• Douglas T. Young

• Jessica Patricia Conry Young

• Kenneth Young

• Robert C. Youngquist

• Anthony Zable

• Katherine Zaunbrecher

• Nicolle Zellner

• Liang Zeng

• Keith Zengel

• Alfonso Zerwekh

• Michael Ziese

• Dean A. Zollman

• Alma C. Zook

• Kristina Zuza

• John Zwart