Dissertation

## 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)

*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)

DCC's "Monday Moves" to Catholic University and Points of Interest Join DCC and Conte’s Bike Shop (Navy Yard) for a fun 25+ mile ride to the US Capitol, Union Station, the Lincoln mural, Catholic University, Brookland, Chuck Brown Memorial Park, the U.S. National Arboretum. This ride is geared towards our newer riders (with a chill pace and no one left behind), but all are welcomed. The ride is on streets, trails and sidewalks. There will be a safety briefing to help riders become more comfortable with riding in groups. We will meet at Conte’s Navy Yard Bike Shop at 10 am and depart at 10:15. All riders should bring their own hydration and nutrition, as well as a spare inner tube. *** Please, no music that can be heard by other riders or ear headphones that impede your hearing. Parking is limited at the Navy Yard, so for those driving, an option is to park at Anacostia Park (aquatic center) and take 11th street bridge to M Street, then a left on 4th. ****all riders ride at their own risk**** If there is a chance of inclement weather expected on Monday, a cancelation notice will be posted by 9:00 pm on Sunday; otherwise, the ride will take place. Below is the link to the route: (~16 miles and ~712 ft of elevation) https://ridewithgps.com/routes/41287079

**Advance ticket sales have ended but plenty of additional tickets remain available at the door.** [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).

📚 Do you love reading, but wish you had a structure and a community to share your insights with? Join our small circle of curious minds (just 4 members per gathering) as we come together for an hour of focused reading—in the calm setting of a library or the cozy atmosphere of a café. Here’s how it works: First part: Quiet reading on your own—bring a book you’re exploring, whether it’s philosophy, history, psychology, literature, or anything meaningful to you. Second part: We regroup and each person shares key takeaways, insights, or questions sparked by their reading. This sparks a structured yet free-flowing conversation around ideas, perspectives, and personal reflections. Why join? Add structure to your reading habit. Discover new books, authors, and ideas through others’ choices. Build real connections by sharing and listening deeply. Socialize around something meaningful instead of small talk.

**\*\* NOTE--We are meeting 1 hour earlier than usual because of room availability. We will start at noon instead of 1 pm. \*\*** **Life** Charles Louis de Secondat, baron de Montesquieu, was born in 1689 near Bordeaux, France to a noble and wealthy family. He trained as a lawyer at the University of Bordeaux. Through marriage and inheritance of a position in the Parlement of Bordeaux, he was financially secure before 30 and had time to read and write, in addition to his duties at Parlement. His first successful book was *Persian Letters*, an epistolary novel published anonymously in 1721 that satirizes French society from the point of view of two wealthy Persians. He then sought to turn his literary success into social success at court, salons, and the French Academy. In 1728, he took the grand tour; over the course of several years, he visited Vienna, Hungary, Venice, Florence, Rome, and England, where he became a fellow of the Royal Society. His next major work, published in 1734, was *Considerations on the Causes of Romans’ Greatness and Decline*. In 1748, he published his most famous work, one that he claims took him twenty years and that was to greatly influence the American Founders: the *Spirit of the Laws*. He died in 1755. **Themes** The influence of the *Spirit of the Laws* on the Founding generation that crafted the U.S. Constitution has secured for Montesquieu enduring relevance for those who want to understand the Founding Era and the Constitution. In this sprawling work, Montesquieu divides the types of government into republics, monarchies, and despotisms, each of which has its animating principle (virtue, honor, and fear). This contrasts with Aristotle’s categorization of polity, aristocracy, and monarchy, each of which has a corrupted form, democracy, oligarchy, and tyranny, respectively. Montesquieu argued that liberty can be best protected by the separation of the legislative, executive, and judicial powers, which finds expression in the three branches of the U.S. government. Among many other notable ideas in this work, he argued that laws should be crafted to accord with a people’s religion, climate, habits, wealth, and other social and economic factors. Against earlier natural law theorists, such as Grotius and Pufendorf, he argued that war did not justify slavery. In the prior century, Pascal had made a name for himself in taking on the Jesuits in his *Provincial Letters*. Several decades later in *Persian Letters*, Montesquieu used a similar rhetorical setup to satirize Parisan and French life, including religion, social practices, and the monarchy of Louis XIV from the perspective of two Persian travelers, Uzbek and Rica. The Letters show Montesquieu’s willingness to at least somewhat relativize European practices, if only to make points consistent with his own social and political class. In the *Considerations*, Montesquieu takes up a theme that would later make Edward Gibbon famous. One of his arguments in this work is that the maxims that made Rome an empire out of a republic were inadequate to keep the empire. He also argued that chance doesn’t rule events; there are underlying causes that can be discovered. **Reading** Our reading for this month is *[Montesquieu: Selected Political Writings](https://www.amazon.com/Montesquieu-Selected-Political-Writings-Classics/dp/0872200906/)*, about 242 pages. The book includes short selections from the *Letters* (the stories of the Troglodytes and Uzbek’s management of his seraglio) and *Considerations* and substantial selections from the *Spirit of the Laws* touching on principles of the three governments, political liberty, the relationship between laws and climate, slavery, and other topics. Please also read the introduction. **Optional** * [Baron de Montesquieu, Charles-Louis de Secondat](https://plato.stanford.edu/entries/montesquieu/) in the Stanford Encyclopedia of Philosophy * [Montesquieu](https://www.britannica.com/biography/Montesquieu), Britannica * [Montesquieu and the Separation of Powers](https://oll.libertyfund.org/pages/montesquieu-and-the-separation-of-powers), the Online Library of Liberty

**‼️This is a MAFN (Mid-Atlantic Facilitators Network) event. To attend, register at [https://mafn.org/event-6471409](https://mafn.org/event-6471409)** WHEN: Friday\, April 17\, 2026 \| WHERE: Mason Fuse Center \- 3401 Fairfax Drive Arlington\, VA 22201 Don't miss out on this opportunity to Explore \| Sharpen \| Connect We’re bringing the MAFN community together in person this spring - Join us! **What You will Experience** Expect a day filled with fresh ideas, meaningful conversations, and the energy of being in community. Attendees will direct their own agenda around the content themes through interactive workshops and meaningful opportunities to connect and network before and after the conference. **CONTENT Themes:** * Business development in dynamic times * Technology shifts in facilitation * Facilitating amid polarization and conflict **Who Should Attend and Why** If you lead groups, facilitate change, or guide learning, New Frontiers in Facilitation is designed for you. This one-day, in-person conference brings together facilitators, trainers, educators, coaches, mediators, and organizational leaders to explore cutting-edge practices in business development, technology in facilitation, and working across divided contexts. Beyond the sessions, the conference emphasizes intentional networking to help you build meaningful connections that last well beyond the event. Join us and leave inspired, equipped, and connected for the future of facilitation. **SCHEDULE** * Registration & Coffee Networking from 8:30 * Plenary * Rae Ringel - Rupture & Renewal, How Facilitation Evolves in a Polarized AI-Driven World * Six workshops in three parallel sessions (the opportunity to join three in the program) * Bola Audena - Scaling with Purpose: Building a Thriving Facilitation Brand in the Age of AI * Carly Chomer & Kim Fredrich - Make Your Business Development Meaningful Not Mechanical * Christine Gerson & Eboney Dixon-Crump - Clarity, Curiosity and Connection: Coaching Through Polarization & Communicating Across Differences * Jennie Toner-Algin - Find the Beat: Using Musical Techniques to Reduce Polarization and Navigate Group Conflict * Mike Burns - AI and Facilitation: Asking Not What It Can Do, But What It Should Do * Nikki Frias - Building Bridges in Conflict and Uncertainty with Applied Improv * Lunch & Networking * Parallel sessions * Knowledge Cafe: Join table hosts for skills-based learning * Open Space: Join fellow participants to reflect on key learnings, collaboratively explore emerging questions, and engage in self-directed dialogue with peers. * Closing * Happy Hour & Networking from 4:00 **Sponsorships available** Interested in reaching 100+ facilitators and organizational leaders? Contact us today to ask about being the sole presenting sponsor! View Sponsorship Opportunities: [https://mafn.org/resources/Documents/MAFN%20New%20Frontiers%20Sponsorship%20Deck.pdf](https://mafn.org/resources/Documents/MAFN%20New%20Frontiers%20Sponsorship%20Deck.pdf) Email Us: treasurer@mafn.org **Rates** **Members:** Early-Bird (until 11:59 pm on 2/15/26): $99.00 Regular Rate starting 2/16/26: $129.00 Membership Bundle (Member & Registration): $199.00 **Non-Members:** Non-Member Early Bird (until 11:59 pm on 2/15/26): $129.00 **Students:** Current/Active Student: $79.00

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.

Join the Bitcoin District Book Club! We meet every month to explore new and exciting rabbit holes by reading books that are popular with bitcoiners. Join us for a deep dive into End Times: Elites, Counter-Elites, and the Path of Political Disintegration by Peter Turchin. In this thought-provoking session, we’ll explore the structural forces that have historically led to societal instability—and why Turchin believes we are entering such a period today. Drawing on his work in “cliodynamics” (the quantitative study of history), Turchin examines cycles of rising inequality, elite overproduction, and political fragmentation. We’ll discuss how internal competition among elites and growing public discontent have repeatedly destabilized societies—from ancient Rome to modern America—and what this might mean for the decades ahead. For those interested in macro trends, power structures, and long-term societal patterns, this book offers a compelling framework for understanding today’s increasingly chaotic world. Buy the book on [Amazon](https://a.co/d/097mab73) **Event Notes:** * Discussion Starters: We’ll kick things off with a few key questions around elite dynamics and societal cycles, but feel free to bring your own perspectives. * Future Reads: Let us know if you have recommendations for future book club selections! We’ll add them to the list posted on our website. * Afterwards: Feel free to join us at Pubkey after the meeting to hang out, continue the conversation, and grab some food! **Getting There:** * 🔴🟢🟡 Gallery Place/Chinatown + 2 min walk * Parking: Street & garage parking available nearby

踏入《广论》研讨班，对许多人来说是开启生命转变的契机。或许您也会好奇：在繁忙的工作与生活之余，投入时间研读佛典，究竟能为人生带来哪些实质的成长与收获？ 《广论》研讨班秉持着日常老和尚以心灵提升、圆满生命的目标，提供大众身、心、灵健康的学习环境与循序渐进的佛法课程。学员通过听师父的录音带和研讨交流，对佛法建立整体认识，全面的理解，同时学习如何将佛法智慧运用于生活中，打造幸福人生。 **《菩提道次第广论》简介** 佛法大全，给与您心灵滋养，人生方向 次第井然，引领您脚踏实地，步步向上 心智科学，帮助您认识自己，了解他人 幸福教育，教会您正确取舍，离苦得乐 生命教育，陪伴您创造希望，走向美好

Laser tag with the GLTech community

**💻 Reimagine Your Second Half of Life – AI Vision Board Immersive Experience (Ashburn)** ✨ **Early Access Rate: $35 (5-Hour Immersive Experience — Lunch, Coffee & Snacks Included)** 🗓 Saturday\, April 25 \| 10:00 AM – 3:00 PM 👥 Limited to 10 participants **“This was such an awesome event! … Once you see that you can’t unsee it. It’s in the making and you will start to discover ways to make that dream materialize.” – Tracy J.** (Comment from January 2026 AI Vision Board session) *** **☀️ Not Just a Vision Board — A Mirror** Midlife isn’t a crisis. It’s your comeback story. This immersive is built around the **R.I.C.H. Quadrant™**: • Relationships — who you let in • Ideal Life — what you actually want • Career/Finance — how you show up • Health — the energy that fuels it all If you’d like a deeper look at the framework, you can preview it here: 🔗 [https://midlifereinvention.co/blog/f/the-rich-quadrant%E2%84%A2-living-with-clarity-in-every-part-of-life](https://midlifereinvention.co/blog/f/the-rich-quadrant%E2%84%A2-living-with-clarity-in-every-part-of-life) **In under 5 minutes, you’ll uncover your values.** And when your vision board is aligned with that truth? It stops being decorative — and starts becoming directional. People often have multiple “aha” moments during this session. Not because it’s dramatic — but because something quietly clicks. *** **🕐 What the Day Feels Like** This isn’t a lecture. It’s structured, but human. It’s focused, but energizing. **Morning —** Identify your core values + 2 priority quadrants. **Midday —** Lunch + intentional networking. **Afternoon —** Complete the remaining 2 quadrants + short coffee reset. *** **💻 Laptop Required — Please Ensure ChatGPT Is Logged In Before Arrival 💻** This workshop moves quickly and works best on a laptop. • **Laptop required** (phones will not work well for this experience. **iPads** may be used, but the experience is significantly smoother on a laptop.) • **ChatGPT account created and fully logged in before arrival** (please bring your login credentials with you; free version is fine) To protect everyone’s experience and keep the session on schedule, ***we cannot pause for account setup***. Please arrive fully prepared. If you need help setting up ChatGPT in advance, message me after RSVP. *** **🧠 What You’ll Walk Away With** • Clarity on which area of life needs alignment • A personalized AI-powered vision board • Defined 3, 6, and 12-month direction • Better prompts to use AI intentionally • Real conversations with people who are building, not drifting *** **🥗 What’s Included** • Full 5-hour guided immersive • Pizza + salad lunch • Coffee + curated snacks • All prompts and digital templates • Small-group collaboration *** **👥 Who This Is For** • Divorced/Separated professionals rebuilding intentionally • Entrepreneurs mapping their next chapter • Adults in a season of reset • People who prefer clarity over vague motivation This is thoughtful work — done in community. *** 📍 Ashburn area (exact address shared after RSVP) 💵 $35 Early Access Rate 👩‍💻 Bring laptop + ChatGPT ready 🔔 These are early-access rates as we expand the format. Future sessions will be priced higher. Space is intentionally limited to 10 to keep this interactive and meaningful. Come design what’s next — with structure, clarity, and a little help from AI. 🌐 [https://midlifereinvention.co](https://midlifereinvention.co)

[Profs and Pints Northern Virginia](https://www.profsandpints.com/washingtondc) presents: **“Doom and Dinosaurs,”** a look at how mass extinctions shaped the dinosaurs and what research on these events tells us about Earth life’s long-term prospects, with Ian Wilenzik, paleontologist and visiting assistant professor of biology at George Washington University. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/nv-dino-doom](https://events.ticketleap.com/tickets/profsandpints/nv-dino-doom) .] Pity the poor dinosaurs. They lacked both scientific research to help deal with potential environmental catastrophes and places where they could have a beer and discuss it. You, on the other hand, have the opportunity to come to Profs and Pints to hear a fascinating talk on the impact of mass extinctions on dinosaur evolution and what research on dinosaurs tells us about biodiversity and Earth’s current biodiversity crisis. Dr. Ian Wilenzik, who has studied and taught courses on dinosaur evolution, population spread, and extinction, will leave you with a greater appreciation of the resilience of life on earth and how we’re both the product and source of biologically catastrophic events. Many of us are familiar with how a big meteor impact about 66 million years ago wiped out the Earth’s dinosaur population, leaving us only with their feathered descendants, birds. Less well known is how the Earth actually has undergone five periods of mass extinction that wiped out nearly all life, and how dinosaurs arose from one and endured another—both caused by volcanic activity—before meeting their match in the third. To ground his discussion, Dr. Wilenzik will talk about how we study mass extinctions by looking for geologic evidence of volcanic activity, meteoric blasts, and other catastrophic activity and of gaps in the fossil record after them. He’ll also discuss what makes a dinosaur a dinosaur, describing their distinct anatomical features. He’ll talk about how they and other forms of life evolved over long periods of time and were affected by extinction events. We’ll look at how the meteor-caused mass extinction that wiped out dinosaurs at the end of the Cretaceous paved the way for the rise of mammals and the emergence of primates, and, eventually, us. Looking ahead to future mass extinctions and what might survive them, we’ll talk about how that plant you forget to water might have the last laugh, as well as why crocodiles might be around a while. (Doors: $17, or $15 with a student ID. Listed time is for doors. The talk starts 30 minutes later.) Image: A *Triceratops* mounted skeleton at the Los Angeles Museum of Natural History (Photo by Allie Caulfield / Wikimedia Commons).

Please join us for the April Romance Book Discussion Club! Location is at my apartment in Dupont. Address and details will be provided to attendees closer to the meeting. Also, please update your RSVP by 6pm the day before, if you're unable to come. That will allow people on the waitlist to have enough time to consider coming, as well. Looking forward to discussing romance books with you all! **Information for New Members:** Each month we will vote on a subgenre and trope to guide our reading choices. There will be a voting link shared in the discussion board with 1 week to vote on your top choices. I'll then post the votes for that month and people can share recommendations. These are just for inspiration and as general themes. There is no set book - you're welcome to read whatever you like, although many members find it fun to explore new subgenres or tropes and see what you may like or hate. This is a book club for mood readers :) You're welcome to read whatever you fancy and come discuss it. Hopefully you'll leave with some new recommendations - or books you know are not your cup of tea. Please feel free to post below or message me with any questions.

Do you know how to protect what feeds us? What about that protection to begin with - ever thought about it? Lucky us, the April CyberTech event is here! Join us on **Tuesday, April 14, 2026,** at **Honor Brewing Company** at **42604 Trade West Dr, Sterling, VA 20166**! Want a custom name tag to enhance your networking opportunities? Register here and yours will be ready at the door: https://share.hsforms.com/12XOIQJUmSUeWF_8p8xm13Qdwxz1 Join us for an eye-opening evening with our spotlight speaker, **Kristin King, CEO of AnzenOT & AnzenSage!** In this session, **Kristin King** pulls back the curtain on the invisible systems powering our food supply and what's at risk when they're disrupted. From farm to distribution to global supply chains, she explores ***how cyber threats can ripple far beyond the field***, impacting economies, security, and daily life. Kristin is a cyber and OT risk expert focused on proptecting critical food and agriculture systems. As **CEO of AnzenOT** and **AnzenSage,** and **VP of Food Cybersecurity at CSAFI**, she brings a rare, systems - level perspective shaped by more than 25 years in technolog and environmental work. Join us on April 14 to meet **Kristin King** and dive into the effects of cyber on food and agriculture! **Agenda** 5:30 Social hour and networking begins 6:10 Welcome & RSA Recap 6:20 Spotlight Speaker - **Kristin King** 6:50 Q&A 7:00 Open Mic & Networking Continues 7:30 Adjourn