Astrophysics

*From the [publisher's website](https://press.princeton.edu/books/hardcover/9780691268927/irans-grand-strategy):* Iran presents one of the most significant foreign policy challenges for America and the West, yet very little is known about what the country’s goals really are. Vali Nasr examines Iran’s political history in new ways to explain its actions and ambitions on the world stage, showing how, behind the veneer of theocracy and Islamic ideology, today’s Iran is pursuing a grand strategy aimed at securing the country internally and asserting its place in the region and the world. Drawing on memoirs, oral histories, and original in-depth interviews with Iranian decision makers, Nasr brings to light facts and events in Iran’s political history that have been overlooked until now. He traces the roots of Iran’s strategic outlook to its experiences over the past four decades of war with Iraq in the 1980s and the subsequent American containment of Iran, invasion of Iraq in 2003, and posture toward Iran thereafter. Nasr reveals how these experiences have shaped a geopolitical outlook driven by pervasive fear of America and its plans for the Middle East. Challenging the notion that Iran’s foreign policy simply reflects its revolutionary values or theocratic government, *Iran’s Grand Strategy* provides invaluable new insights into what Iran wants and why, explaining the country’s resistance to the United States, its nuclear ambitions, and its pursuit of influence and proxies across the Middle East. ***How to find us:*** We meet in the upstairs seating area at Zorba's in Dupont Circle. Look for a sign on a table with a picture of the book's cover on it. ***Links:*** **[Bookshop](https://bookshop.org/a/91030/9780691268927): By purchasing your book through this link, you help support local bookstores and defray the cost of DCIA's Meetup subscription.** [Amazon](https://www.amazon.com/Irans-Grand-Strategy-Political-History/dp/0691268924) [Princeton University Press](https://press.princeton.edu/books/hardcover/9780691268927/irans-grand-strategy) [WIkipedia page about Vali Nasr](https://en.wikipedia.org/wiki/Vali_Nasr)

## Details Zoom Link : **[https://jesushousedc-org.zoom.us/j/3167877043](https://jesushousedc-org.zoom.us/j/3167877043)** Register for our guest list/book: [Forms for Invite](https://forms.gle/Qowi1t4aDbQaJhvG8) Come join your neighbors in developing your leadership and public speaking skills. We are a group of students, professionals and ambitious individuals interested in personal development. Daniel Leadership provides a fun environment for both working with groups, leading, and speaking in front of an audience. We meet every 2nd and 3rd Monday of the month, in downtown Silver Spring, convenient to the metro. Come join us to develop your professional skills, practice public speaking in front of a supportive group, or to just make friends. We hope to see you there! Come join your neighbors in developing your leadership and public speaking skills. We are a group of students, professionals and ambitious individuals interested in personal development. Daniel Leadership provides a fun environment for both working with groups, leading, and speaking in front of an audience. We meet every 2nd and 3rd Monday of the month, in downtown Silver Spring, convenient to the metro. Come join us to develop your professional skills, practice public speaking in front of a supportive group, or to just make friends. We hope to see you there! What to expect: • Come by and meet the members from 7:00-7:15 • Be wowed by 3-4 speakers practicing their craft • Practice your own public speaking with table topics • Learn about evaluating speeches to understand critical thinking • Make great friends with others interested in personal development Transportation/Parking: • We are 1/2 mile from Silver Spring metro • Located on the F4 bus line & 1 block from 4, 15, 16, 17, 18, 20 bus lines • Convenient street parking • 2 blocks from Fenton Village Garage 4 Parking Lot (https://www.google.com/maps/place/Fenton+Street+Village+(Garage+4)/@38.9896363,-77.0262983,17z/data=!4m8!1m2!2m1!1sSilver+Spring+parking!3m4!1s0x0:0xc69eb61284ac2daa!8m2!3d38.9909589!4d-77.025231)

[Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“What Digital Detectives Find,”** on the afterlife of your digital data and the methods of those who investigate it, with Jim Jones, associate professor at George Mason University and cyber security and digital forensics expert. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/dc-digital-detectives](https://events.ticketleap.com/tickets/profsandpints/dc-digital-detectives) .] What happens when you delete digital data such as a picture, video, or email message? The truth is that “deleted” doesn't mean “gone,” and digital forensic investigators can extract and make sense of the residual fragments left over from data often assumed to be gone forever. Learn about the field of digital forensics—and the lessons it offers those who worry about sensitive data being exposed—with Jim Jones, who has been a cyber security and digital forensics practitioner, researcher, and educator for more than 30 years. You’ll learn how all investigations today, criminal and otherwise, to some degree involve digital forensics, an interdisciplinary field that draws from computer engineering, computer science, information technology, law, and ethics. Digital forensics doesn’t just respond to specific incidents, but also seeks out threats within organizations, analyzes malware, and buttresses cyber security. Much of the work of Dr. Jones, his colleagues, and students involves examining digital systems of all types to understand how data persists and decays and how it can be found and recovered. Dr. Jones will discuss how what happens to the digital data that you deleted depends on the type of device you are using, along with a host of other factors. You'll learn how digital data is stored on different devices and what does and doesn’t happen when you delete that data. You'll see examples of data extracted from different devices, demonstrations of what can be inferred from these remnants, and how investigators can tell if such remnants are genuine or not. Finally, you'll learn about strategies to mitigate the risk of exposing sensitive data. Dr. Jones will sort those that work from those that don’t. (Doors: $17, or $15 with a student ID. Listed time is for doors. Talk starts 30 minutes later.) Image: A digital forensics examiner works with evidence in the FBI’s New Jersey Regional Computer Forensics Laboratory (FBI photo).

Loop around Lake Accotink. **Meet at Lake Accotink Park carousel parking area.** Trail is fairly flat, paved and gravel, easy, brisk walking. A few steep sections Views of Lake Accotink About 4 miles. We will leave promptly at **600 pm**, please arrive early so you are ready. We walk briskly, not this is not an evening stroll. The rest rooms at the meeting spot are closed for renovation. Make sure to bring water. We will meet at the traffic circle near the carousel. Goggle maps calls it Lake Accotink Park. You can park at the Hemming Ave lot, or under the railway bridge. the lot at the carousel is small and usually full.

This event is for all my singles who are looking to attend a dating event with a twist! must RSVP via Eventbrite. Come out and meet other singles, and form connections based on cosmic compatibility. There will be speed, dating, great music, great vibes, giveaways, and other surprises! There will be a different astrology theme every week. Speed dating, astrological, matchmaking, astrology game nights, etc make sure you are locked in and following us at. @TheeZodiacStore on IG and TikTok!

We have returned to live, in-person meetings! That means we are able to give our presentations to a **live** audience. We can look people in the eyes and use body language to share our message. If you have been missing this type of communication skills building, come to our meetings to experience it with us! ............ The Jim Whitney Club meets twice per month, on the second and fourth Mondays. We are attracting new members with our fun and educational program. Visit us. Walk our path with us. Go to https://jwtm.toastmastersclubs.org/ for more information about us. Toastmasters will change your life. This club was formed in memory of a wonderful man who had a talent for recruiting new members and building new clubs. We have energetic, organized, and productive meetings so that we may showcase the value of being a Toastmaster. Get directions to our meetings and learn more about us by visiting our website: http://toastmasterjim.toastmastersclubs.org/

PLEASE READ AS THERE IS AN IMPORTANT CHANGE for the blind tasting at Maxwell Park only: prepayment will be required. Please note that refunds for cancellations are allowed up to 12 hours before the event start time. (This would be 6:15 AM so best to cancel the night before and definitely as soon as you know.) Please bear with me as we navigate this new process. The real maximum number of attendees will remain at 14, but since the Meetup App won’t let me make it a requirement to pre-pay when you RSVP "Yes," I’m not going to set a cap on Meetup's RSVP list, and we will see how that goes. Because there is no linkage between the Meetup App and Maxwell’s prepayment link, you can’t rely on Meetup's RSVP feature to know if there are still spots available. You will only know with certainty that the attendee cap has been reached if you are rejected while trying to prepay. Here is the pre-pay link: [https://www.giftrocker.com/secure/Order/?h=4375667a](https://www.giftrocker.com/secure/Order/?h=4375667a) Let me know if you have any specific questions. Thank you for your patience as we transition to this new process! Maxwell Park is 4 blocks from the Mt. Vernon Sq/7th St-Convention Center. 🍷 RSVP Please: --**If your plans have changed, please change your RSVP to No.** *Note start time of 6:15 PM!* Please plan to arrive on time. 🍷 What is blind wine tasting? In a blind tasting you use your sense of smell, sight, and taste to try to deduce which variety(wine grape) is in your glass. 🍷 Do I need to be a wine professional? Definitely not - this group is experience diverse and we welcome both wine newbies and wine pros (and everyone else in between). 🍷 How does this work? --Please arrive slightly before 6:15pm to grab a seat. --Maxwell Park will serve us two wine flights: 3 white wines around 6:20 pm and 3 red wines around 7:30 pm. Each flight is $20. A 20% gratuity and tax is added to that. Food and other wines are also available for purchase. --We will discuss each flight as a group and try to reach somewhat of a consensus. Then comes the *big reveal* where we discover if our guesses were right. Full vaccination is required, masks are optional. Unfortunately, while we will try to be as careful as possible, we cannot promise that this will be 100% Covid risk free, please keep that in mind when deciding whether or not to attend. Stay home if you are experiencing any symptoms of Covid 19. Please keep an eye on this event for possible changes. Hope to see you there ! \~ Linda Lists of possible wines: [White Wine Varieties](https://www.mastersommeliers.org/sites/default/files/ES%20Tast-CMS%20Probable%20List%20of%20Examinable%20White%20Grape%20Varieties-NEW_2015.pdf) [Red Wine Varieties](https://www.mastersommeliers.org/sites/default/files/ES%20Tast-CMS%20Probable%20List%20of%20Examinable%20Red%20Grape%20Varieties-NEW_2015.pdf)

Title: Potential Applications of Negative Radiation Pressure in Astronomy, Medicine and 2WQC Date: April 19 2026 10:00 am - Noon EDT (16:00 - 18:00 CET) Abstract: While we are used to heating and pushing with light, there is also optical cooling and pulling. I will talk about negative radiation pressure, potential ways to generate it, and its novel applications, like non-ionizing medical scanners, 2WQC (two-way quantum computers) in theory solving NP problems, also potential astronomical sources and their observation. Speaker: Dr Jarek Duda is an assistant professor at Jagiellonian University. He holds degrees in computer science (PhD), mathematics (MSc) and physics (PhD). He is mainly focused on physics foundations, information theory, statistical analysis, and is known for introduction of asymmetric numeral systems.

Business Oriented Toastmasters (BOTM) is an exceptionally strong Toastmasters club in Rockville, MD. Our club has earned President's Distinguished Club status for the last thirteen years in a row. We are dedicated to helping each of our members achieve their personal public speaking and leadership goals in a friendly, supportive environment. We pride ourselves on having organized, professional meetings with strong evaluations, while having fun at the same time. Guests are always welcome and no notice is necessary. Just show up and plan to have fun. See how BOTM can help you achieve your goals. We are a diverse club with both seasoned and new Toastmasters, and all ethnic and professional backgrounds. For more information, please visit our website at botm.toastmastersclubs.org or contact us at contact-2279@toastmastersclubs.org Meeting locations: 1st Wednesday of every month in person at Faith United Methodist Church, 6810 Montrose Road, Rockville, MD 3rd Wednesday of every month via Zoom

Join a diverse, inclusive group for a supportive, encouraging meeting to develop your speaking and leadership skills based on your personal goals. We meet on the 2nd floor of the Bethesda-Chevy Chase Regional Services (BCC) Building (on the corner of Old Georgetown Rd. and Edgemoor Ln.). It is the building with flags out front and across from the bus bay for the Bethesda metro station (Red line).

Arlington has a planetarium called the David M Brown Planetarium. I forget about it all the time. They host a monthly event. This month's starts at 7:30pm on April 18. Let's meet up at Quincy Hall beforehand and get buzzed before we learn about the Solar System. Tickets to the planetarium show are $5. They can be bought at the door and online. The online ones aren't available yet but I'll post a link when they are. The David M Brown Planetarium is at 1426 N Quincy St, Arlington, VA 22207 right around the corner from Quincy Hall. The show is called Dynamic Earth: https://friendsoftheplanetarium.org/event-6339264

We are the Federal Center Toastmasters Club. We meet the 1st, 3rd, and 5th Thursday of each month in Hyattsville, MD, from 12 noon to 1pm. Our meetings are held at the headquarters of the CDC’s National Center for Health Statistics of the CDC. Our meetings are open to the public, though visitors must go through building security procedures. For visitors who are not U.S. citizens, we do need to pre-coordinate a first visit with our security team. Contact us at: 1260@toastmastersclubs.org. We have been a Toastmasters Club for 40 years and always welcome new members! Join us, and you will improve your public-speaking and leadership skills in a friendly, supportive atmosphere!

Title: Foundations of Localized Symmetry Mathematics Date: April 18 2026 Noon - 14:00 EST Summary: The moment you use Euclid’s definitions of points and distances in any of your mathematical axioms, all that follows is assured to produce some level of nonsensical results when applied to the foundations of physics. The reason is not complicated: Euclid’s definitions are deeply mired in accepting as a “given” the very concepts that emerge only in well-defined inertial frames, which in turn are local instances of symmetries that are always finite and context dependent. In this talk, Terry will discuss how reframing mathematics in terms of symmetries that, as in the real world, are finite, composite, and dependent on self-observation (acceleration), results in a richer and far stranger set of mathematics in absolute conservation of quantum numbers generate local and global symmetries — the opposite of Noether’s theorem — that in turn create the emergent classical phenomenal such a particles, fields, space, and time. Speaker: Terry Bollinger is a computer scientist with BS, MS, and professional degrees from the Missouri University of Science and Technology.

Let’s try this popular Italian restaurant in Reynoldsburg. This is the menu: https://scaliristorante.com/#4e468054-0235-43e2-81c2-44e061341e9e

Join the CONNECTED Westerville Mastermind Group for a dynamic afternoon of B2B networking! This event is perfect for professionals looking to expand their business connections, share insights, and foster collaboration within the community. Whether you are a seasoned entrepreneur or just starting out, this event offers a valuable opportunity to exchange ideas, build relationships, and grow your network in a supportive environment. Connect with like-minded individuals, explore potential partnerships, and discover new opportunities for professional growth. Don't miss out on this chance to enhance your business network and take your career to the next level with CONNECTED Westerville Mastermind Group! We meet the 4th Monday of every month from 11am-1pm. Welcome and general networking from 11am - 11:30am with core meeting 11;30 - 12:30 and a final round of networking from 12:30 - 1pm.

Sleep in on Sundays. When you've had your fill of pajama-time, roll out and have some tasty brunch with your fellow Humanists!

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability. This session will be at the Worthington Park Library in the Olentangy Meeting Room.

ASH is Atheists, Skeptics and Humanists of First Unitarian Universalists of Columbus Ohio TBD Snacks are usually available, and you are welcome to bringing something to share!

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Here is the secret of being positive and free: Thinking positively is not enough. You also have to get rid of the negative thinking. Your mind is like a garden. You can plant many beautiful flowers in it, but if you don't get rid of the weeds when you plant your flowers, the weeds will soon take over the whole garden. A positive thought is like a flower in your mental garden, and a negative thought is like a weed. You cannot expect to have a positive mindset if you continue to have negative thoughts dwelling and growing there. So, how do you get rid of the negative thoughts? That's what this Meetup is all about. Attend this local meeting and find out! The Meetup event will be led by a consultant who had helped many people live happier in life. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is created by the Dianetics & Scientology life improvement center.

Who else is ready to sit outside? Join us for a casual chat over coffee & tea at Grandview Grind! Come out and meet some new people, enjoy your favorite drink, and make some new friends!