There is no general rule on what material is appropriate for presentation at SIAM conferences. However, we urge participants to be aware that the use of some material (text, images, etc.) may offend attendees of SIAM conferences, and to refrain from using this material in their presentations. For example the "Lena image," which is a segment of centerfold that appeared in a 1972 “adult” magazine, has in the past been used in publications on imaging, and is inconsistent with efforts to promote women in science and engineering. SIAM will not consider journal submissions containing images such as this, and we request that all SIAM conference participants also refrain from using similar material in any presentations.