sudo-discuss

sudo-discuss@sudoroom.org

7 participants
7410 discussions

Start a nNew thread

Science Hack Day Oct 4-5

by Matthew Senate

https://www.eventbrite.com/e/science-hack-day-san-francisco-2014-registrati…

11 years

Omni website and subdomains up and running!

by Jenny Ryan

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hey folks, Apologies for my unexpectedly internet-free vacation. DNS has been configured properly and you'll find the new website at omni-oakland.org as well as working subdomains (currently wiki.omni-oakland.org and do.omni-oakland.org). WIKI ACCESS: New account creation has been disabled due to spam, so please contact myself (tunabananas(a)gmail.com), AL, Jeremy, David Keenan, Matt S, or Patrik to request an account.[1] FARNSWORTH ACCESS: For access to do.omni-oakland.org, where we're trying out a system for coordinating tasks among the various Omni groups and members, please request an account via the site. Just a reminder for folks interested in helping out with our communications technologies, the Omni Communications group meets every Monday at 7pm! We've been in summer hiatus but there's still plenty to do. You can find out more here: http://wiki.omni-oakland.org/w/Communications_Working_Group Cheers, Jenny [1] The ConfirmAccount plugin, which typically works well for forcing new accounts to be requested rather than auto-confirmed, is not working and has been thoroughly investigated by juul. Next step would be to upgrade Mediawiki and see if it works with a more recent stable version. Will try this tomorrow. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTx6cZAAoJEHTWWpBUSeDhbC8H/0PMX1kH2LC/VQJQNnjdd6db INRakweTm6WO2nOblY2SPm8rmwbbcuNQNna6IDzubO50I0JOrJf+KhSuKpQ8SxT/ GPr+Qltcb24Y/2+RMq/BjAoN5xnau6FFF2Ker+oMhCKDcaCJRx9CB0072O8JNfUz OtsuGtG+T8BSyY2+b+ATMFyAfTlCOPUINH34hTzGc8bmZRuTVhBMShWWs7x18Vw4 8jjGIEOBr35ReizuF7y80Z8LwxODfWE3E6CnAxo0MQpZOM6CSWiT+vbZJELIuJ/W 6To5vWjLESgHu7gGJG218ETQWFMJZxi6sv77KYb7VB+tbbyzLYenxhvxLtF88eQ= =pDGe -----END PGP SIGNATURE-----

11 years

FW: [i-announce@ischool] Don't miss next week's Tech Talk: Data Analyticsat Facebook

by Troy Massey

I know someone will like to attend this and give a report back...someone with more technical skill than I... - Troy M. " You are the source of Freedom. The price of freedom is awareness and action." -----Original Message----- From: "School of Information" <events(a)ischool.berkeley.edu> Sent: ‎9/‎10/‎2014 3:52 PM To: "i-announce(a)ischool.berkeley.edu" <i-announce(a)ischool.berkeley.edu> Subject: [i-announce@ischool] Don't miss next week's Tech Talk: Data Analyticsat Facebook Don't miss next week’s tech talk at the UC Berkeley School of Information: Tech Talk: Data Analytics at Facebook With Jake Peterson Wednesday, September 17, 2014, 4:10 pm - 5:30 pm 210 South Hall The event will be recorded and posted here two to five days after the event Jake Peterson will talk about the Facebook analytics team and how they perform large scale data analysis, identify actionable insights, suggest recommendations, and influence the direction of the business. The Facebook analytics team serves as the voice of data that drives success throughout the company, including product development, user engagement, growth, revenue, and operations. Learn about their typical day-to-day responsibilities, challenges, and how best to succeed as a data scientist in analytics. MIMS students Jason Ost and Timothy Meyers will also be on hand to discuss their experiences as Facebook Analytics interns. Jake Peterson is a data scientist and analytics engineering manager at Facebook and has been working in data science for more than ten years — longer than “data science” has been a term. At Facebook, Jake has led data science for four different Facebook product teams, most recently for the Graph Search product. Prior to Facebook, Jake led analytics functions at several tech startups and spent six years in the direct marketing industry as an analytics consultant at Acxiom. He holds a B.S. in computer science and a B.A. in philosophy from Santa Clara University. More information: http://www.ischool.berkeley.edu/newsandevents/events/20140917facebookdatasc… Coming up at the I School: October 8, 2014 - "Securing Cyberspace: A National Priority", Dean's Lecture with Dr. Fred Chang October 29, 2014 - "Leveraging Workforce Science to Unlock Employee Value", Dean's Lecture with Michael Houseman Upcoming Friday afternoon Information Access Seminars: Sign up here for regular email reminders September 12, 2014 - "Mobile Persuasion Design: Combining Information Design with Persuasion Design to Change Behavior", Information Access Seminar with Aaron Marcus (Aaron Marcus and Associates) September 19, 2014 - "If You Could Design A Museum From Scratch, What Would It Be Like?", Information Access Seminar with George Oates (Good, Form & Spectacle) October 3, 2014 - "California Digital Library: Calculating Scholarly Journal Value", Information Access Seminar with Chan Li & Jacqueline Wilson October 17, 2014 - "Editorial Practices and the Web", Information Access Seminar with Michael Buckland October 24, 2014 - "Ontology Mapping: A concept hub for storing mapping data and linguistic methods for producing mappings", Information Access Seminar with Dagobert Soergel, University at Buffalo -- _____________________________________________ UC Berkeley School of Information http://www.ischool.berkeley.edu Facebook: http://facebook.com/BerkeleyISchool Twitter: http://twitter.com/BerkeleyISchool

11 years

Fwd: Its our 6th Annual Cupcake Bakeoff!!!

by Romy＠snowyla

Great stuff! Sent from my iPhone Begin forwarded message: > From: Rock Paper Scissors Collective <info(a)rpscollective.org> > Date: September 10, 2014 at 3:14:45 PM PDT > To: <info(a)miromi.com> > Subject: Its our 6th Annual Cupcake Bakeoff!!! > Reply-To: Rock Paper Scissors Collective <info(a)rpscollective.org> > > > Be the judge at our annual CUPCAKE BAKEOFF! > View this email in your browser > > > Facebook > > Twitter > > Website > > Instagram > This Week at RPSC > CUPCAKES! CUPCAKES! CUPCAKES! > Come on out > SATURDAY, SEPTEMBER 13, 2014 1-4pm > for our > 6th Annual Vegan Cupcake Bakeoff! > You are the Judge! > Crafts! Zines! Fun! > > Sliding scale donation $5-$10 > All proceeds benefit RPSC and keep our skillshare, youth and community programs running! > > > 9.18.14 6-10pm > Join us for Crafts & Drafts the 3rd Thursday of every month at Telegraph Beer Garden (2318 Telegraph Ave). > Support RPSC by having a brew, a bite, chatting & making things! > A portion of Telegraph's sales for the evening will be donated to RPSC. > > Current Gallery Exhibtion: > "Those De NADA Kids" > 9.5.14 - 9.27.14 > > NEW VOLUNTEER ORIENTATIONS > September 10 > September 24 > October 8 > October 22 > 6:30 - 7:00pm > What keeps RPSC running? > VOLUNTEERS! > Come learn all about RPSC by attending a volunteer orientation. You'll get to hear all the different ways you can get involved with us and learn the next steps to become a superstar! No registration necessary but we ask you to be on time as orientations start promptly. > See you soon! > The Rock Paper Scissors Collective is a volunteer-run organization that fosters creativity and collaboration in order to strengthen local communities and encourage sustainable practices and alternative models. We promote the sharing of ideas, skills, and resources through the celebration of art, craft, education, and performance. > > RPSC currently realizes this through an accessible space that offers free and low-cost classes, curated and open submission art shows, the retail of independently made clothing/craft/zines/music, a drop in arts lab, community events space, and youth involvement. > Copyright © 2014 Rock Paper Scissors Collective, All rights reserved. > You are receiveing this email because you opted in at our website or signed up at our physical location. > > Our mailing address is: > Rock Paper Scissors Collective > 2278 Telegraph Ave > Oakland, CA 94612 > > Add us to your address book > > > unsubscribe from this list update subscription preferences >

11 years

East Bay Mini Maker Faire Oct. 19 [was Fwd: Alert! Call for Makers Extended through 9/15]

by Patrik D'haeseleer

Any other groups planning to attend East Bay Mini Maker Faire? I'm planning to register for a booth for CCL. We can ask to be next to each other if we have multiple groups from the Omni participating... I've attended the East Bay Mini Maker Faire since they started 3 (4?) years ago. It has a much more local, intimate, and less commercial feel than the giant San Mateo one. Tons more kids and families as well. Not to mention that it's essentially within walking distance... After party at the Omni? http://ebmakerfaire.wordpress.com/ http://ebmakerfaire.wordpress.com/callformakers/ Patrik ---------- Forwarded message ---------- From: East Bay Mini Maker Faire <info(a)ebmakerfaire.com> Date: Wed, Sep 10, 2014 at 10:43 AM Subject: Alert! Call for Makers Extended through 9/15 To: patrikd(a)gmail.com Call for Makers Extended through 9/15! Is this email not displaying correctly? View it in your browser <http://us2.campaign-archive2.com/?u=41b5f7bd2242e26ef4d81f9a8&id=de68d60e74…>. Call for Makers for the East Bay Mini Maker Faire Extended through 9/15! <http://ebmakerfaire.us2.list-manage.com/track/click?u=41b5f7bd2242e26ef4d81…> First round of acceptances have gone out for the 5th annual East Bay Mini Maker Faire on *Sunday, October 19th.* Only "Mini" in relationship to the "Monster" Maker Faire Bay Area, our Oakland show welcomes *over 7,000 people* to a one-day extravaganza of East Bay (and beyond) talent. In part to help all those dusting off, we are extending the CALL for FABULOUS PROJECTS and MUSIC and WORKSHOPS and PRESENTERS into next week. FILL OUT THE APPLICATION AND GET YOUR SPOT: <http://ebmakerfaire.us2.list-manage.com/track/click?u=41b5f7bd2242e26ef4d81…> http://ebmakerfaire.wordpress.com/callformakers/ <http://ebmakerfaire.us2.list-manage.com/track/click?u=41b5f7bd2242e26ef4d81…> If you have questions or ideas, please get in touch at info(a)ebmakerfaire.com. * We're here to make the good times happen!* *—The East Bay Mini Maker Faire 2014 team* Like us on Facebook <http://ebmakerfaire.us2.list-manage.com/track/click?u=41b5f7bd2242e26ef4d81…> Follow on Twitter <http://ebmakerfaire.us2.list-manage2.com/track/click?u=41b5f7bd2242e26ef4d8…> Forward to a Friend <http://us2.forward-to-friend.com/forward?u=41b5f7bd2242e26ef4d81f9a8&id=de6…> <http://ebmakerfaire.us2.list-manage1.com/track/click?u=41b5f7bd2242e26ef4d8…> *get it in your calendar now:* East Bay Mini Maker Faire Sunday, October 19th, 2014 *10 am—5 pm* Park Day School campus + Studio One Arts Center in the Temescal district of Oakland, CA www.ebmakerfaire.com www.studiooneartcenter.net/ <http://ebmakerfaire.us2.list-manage2.com/track/click?u=41b5f7bd2242e26ef4d8…> *East Bay Mini Maker Faire is independently organized and operated under license from Maker Media <http://ebmakerfaire.us2.list-manage2.com/track/click?u=41b5f7bd2242e26ef4d8…>, Inc. <http://ebmakerfaire.us2.list-manage.com/track/click?u=41b5f7bd2242e26ef4d81…>* unsubscribe from this list <http://ebmakerfaire.us2.list-manage.com/unsubscribe?u=41b5f7bd2242e26ef4d81…> | update subscription preferences <http://ebmakerfaire.us2.list-manage.com/profile?u=41b5f7bd2242e26ef4d81f9a8…>

11 years

robot limitations and hacking

by Jake

My friend Hao of Dorabot wrote me an email that clarifies what we can expect from the robot. Of course this assumes no hacking, and we can hack. one thing I was interested in was "remote" mode through the serial port. I believe that it can be set to be controlled by commands like "let me send you this job" "start that job" which would allow us to effectively control it in real time. but that will take some reading of manuals and experimenting. As for the latter, i have connected the robot's serial port to the desktop computer we use for 3d printing, and I can provide logins for that machine to anyone who wants to experiment. I confirmed that with the null-modem adaptor (thanks Somebody!) it does communicate, although i haven't had any meaningful conversations with it. of course there is always the radical alternative - the entire YASNAC control system could be replaced with a homebrew solution that allows us to do whatever we want. The problem is that it would take a bit of programming to drive the axes at speed without overshoot, and there's dynamic gravity and inertia dependant on the posture of the thing and the mass of whatever it's holding.. could be a lot of math to get it perfect. however, if someone were to create a control program for it, a lot of people around the world might like to use it. Hell, people would probably pay for it since it would easily replace an entire YASNAC ERC unit. the motor controllers we have are the CACR series as described here: http://spaz.org/~jake/robot/CACR-SR-servopinouts.pdf and they are pretty simple to control - you send them an analog voltage to tell them which direction to turn, and how fast. You send an analog voltage to say how much torque to exert (seperately for each direction), and it sends out analog voltages telling you how fast it is going, and how much torque it's exerting. And of course the encoders are always telling you the actual position for all the axes so you can decide whether to make changes to get what you want. in the meantime though, we should keep playing with it as-is and see if we can "hack" to get control of it without anything as radical as a replacement controller. -jake ---------- Forwarded message ---------- There are several models of MOTOMAN robot that can be controlled over serial port, and some even supported by ROS Industrial community. If your Robot controller is DX100, then you are very lucky. However I think your robot is super old so probably not supported by ROS Industrial. You can check it out here: http://wiki.ros.org/Industrial/supported_hardware Anyway, usually an industrial robot can be used in following ways: Teach & Replay by teach panel offline programming (generate a tool path offline and upload it, like 3D printer) modern robot can be used in these ways, in addition to previous ones: online program uploading (you generate end-effector/tool path and upload to the robot control box via serial port/ethernet, and the robot executed it right after it receives the path. very few robot support this: real-time control of the robot joint, including position, velocity, acceleration and so on. As far as I know, only Universal Robot and maybe Baxter support this. Kuka/DLR's LBR(Light Weight Robot) might support it too, but it's not for sale to general public.

11 years

Fwd: Invitation: Dronie Day

by Phil Wolff

---------- Forwarded message ---------- From: *Hackers and Founders* <info(a)meetup.com> Date: Wednesday, September 10, 2014 Subject: Invitation: FYI -- Dronie Day To: pwolff(a)gmail.com [image: Meetup] <http://www.meetup.com/t/ea1_1/> New Meetup FYI -- Dronie Day <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/206453142/t/ea1…> Hackers and Founders Added by Alexis Costanza Thursday, September 25, 2014 10:00 AM Elliott Program Center 589 Governor's Avenue Stanford, CA 94305 This Meetup is full. Want to know if a spot opens up? Notify Me <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/206453142/t/ea1…> REGISTER HERE! Hi everyone! Our good friends over at CameraLends are putting together a really amazing day of flying drones! RSVP over on CameraLends' Meetup Page Here's what they have to say about it! -------------------------------------------... Learn more <http://www.meetup.com/Hackers-and-Founders/events/206453142/t/ea1_grp/?rv=e…> More Meetups from this group <http://www.meetup.com/Hackers-and-Founders/> Sep 11 H/F Co-op Applications OPEN <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/206173962/t/ea1…> Thursday, September 11, 2014 12:00 AM · 1 attending RSVP <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/206173962/t/ea1…> Sep 12 H/F Co-op Applications OPEN <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/206341182/t/ea1…> Friday, September 12, 2014 12:00 AM · 1 attending RSVP <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/206341182/t/ea1…> Sep 13 H/F Co-op Applications OPEN <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/qgwrnkysmbrb/t/…> Saturday, September 13, 2014 12:00 AM · 1 attending RSVP <http://www.meetup.com/__ms16734/Hackers-and-Founders/events/qgwrnkysmbrb/t/…> Sponsored by CameraLends <http://www.meetup.com/Hackers-and-Founders/sponsors/>, Traction <http://www.meetup.com/Hackers-and-Founders/sponsors/>, Most helpful startup program around <http://www.meetup.com/Hackers-and-Founders/sponsors/> and H/F Co-Op <http://www.meetup.com/Hackers-and-Founders/sponsors/> Follow us! <https://www.facebook.com/hackersandfounders> <http://twitter.com/HackFoundSV/> <https://www.linkedin.com/company/3521492?trk=tyah&trkInfo=tas%3Ahackers%20%…> <http://hf.cx/> Never miss a last-minute change. Get the app. [image: iPhone App Store] <http://www.meetup.com/r/email/iphone/0/ea1_appstore/http://itunes.apple.com…> [image: Google Play] <http://www.meetup.com/r/email/android/0/ea1_appstore/http://play.google.com…> Unsubscribe <http://www.meetup.com/__ms16734/Hackers-and-Founders/optout/?submit=true&eo…> from similar emails from this Meetup Group Add info(a)meetup.com <javascript:_e(%7B%7D,'cvml','info(a)meetup.com');> to your address book to receive all Meetup emails Meetup, POB 4668 #37895 NY NY USA 10163 <#1486128f18592eb3_> *Meetup HQ in NYC is hiring!* meetup.com/jobs <http://www.meetup.com/jobs/> -- Phil Wolff pwolff(a)gmail.com skype:evanwolf +1-510-343-5664 http://about.me/evanwolf bio <http://letmydatago.org/>http://twitter.com/evanwolf @ http://www.linkedin.com/in/philwolff cv http://LetMyDataGo.org blog http://www.facebook.com/philwolff face

11 years

Re: [sudo-discuss] Agenda Item for next week's meeting: ONL is not a member collective.

by yar

On Mon, Sep 8, 2014 at 9:06 AM, Andrew Lowe <andrew(a)lostways.com> wrote: > I did not attend this event, but I have attended ONL events before. ONL is a > talk show, I'm not sure why not being political enough makes them > "offensive". I mean I will let them speak for them selves, but they are an > entertainment show, why would you expect a "debate" at a talk show? > > Anyway, just standing up for this show even if it isn't really my cup of tea > all the time, I think what ONL has been able to do with it is pretty > amazing, and to force them out because their show isn't radical enough in > the ways you want it to be would be a shame. Sorry to beat a dead horse here, but just for the record ... 1) To bill Saturday's show as apolitical "entertainment" would be disingenuous. They did not invite Dan Siegel the private citizen to chat with him about his hobbies. They invited three candidates for an upcoming election to air campaign commercials, give stump speeches and answer token questions about their political platform. Exactly that, no more, no less. 2) Absolutely nothing in my critique was "radical". It was barely even liberal. Asking for substantive debate is about the most centrist position you could possibly imagine. Has our overton window really shifted this much?

11 years

" Exploring Greenwashing and Gentrification fromOakland to Palestine"(Workshop Oakland)

by Troy Massey

I invite all who care about the future of Oakland, the vitality of the local people of Oakland as well as the future of our movements toward a more equitable and resilient community of partners to attend this meeting with me - Troy M. " You are the source of Freedom. The price of freedom is awareness and action." Join Phat Beets Produce for this world cafe-style workshop that explores how tree plantings in Oakland, Detroit, and Occupied Palestine function to displace low-income people of color and marginalized groups from their neighborhoods and land for the purposes of development and profit-making. We will explore the commonalities of the techniques and methods used by WOGI (West OaklandGreening Initiative), Hantz Farms in Detroit (largest proposed urban tree farm in the US), and the Jewish National Fund's "Plant a Tree in Israel" campaign to understand how non-profit organizations, private companies and local governments use greenwashing as a tool for displacement and gentrification. -----Original Message----- From: "max cadji max(a)phatbeetsproduce.org [EBSocForum]" <EBSocForum(a)yahoogroups.com> Sent: ‎9/‎9/‎2014 2:04 PM Subject: [EBSocForum] : " Exploring Greenwashing and Gentrification fromOakland to Palestine"(Workshop Oakland) Come check out the Food N’ Justice Workshop series. Always free at the Saturday Feel the Beet! Farmers Market North Oakland Farmers’ Market, 11-1pm. Our workshop series is located at: Grace Ave @Lowell St. (Next to Destiny Arts at 970 Grace Ave, Oakland 94608) www.phatbeetsproduce.org/events September 13, 2014 "Greenwashing and Gentrification from Oakland to Palestine" Description: Join Phat Beets Produce for this world cafe-style workshop that explores how tree plantings in Oakland, Detroit, and Occupied Palestine function to displace low-income people of color and marginalized groups from their neighborhoods and land for the purposes of redevelopment and profit-making. We will explore the commonalities of the techniques and methods used by WOGI (West OaklandGreening Initiative), Hantz Farms in Detroit (largest proposed urban tree farm in the US), and the Jewish National Fund's "Plant a Tree in Israel" campaign to understand how non-profit organizations, private companies and local governments use greenwashing as a tool for displacement and gentrification. More details September 20, 2014 Make it Fresh: Creative Storytelling for the Urban Environment Description: Make it Fresh: Creative Storytelling for the Urban Environment with Josh Healey If politics is the art of what’s possible, let’s use art to expand those possibilities. Join this interactive arts and activism workshop as we write and share new poems and songs, memories and manifestos — and discover how to use your own story to change the larger narrative towards justice and ecology. Josh Healey is an award-winning writer, performer, and creative activist. A regular performer on NPR's Snap Judgment, Healey has performed and led workshops at UC-Berkeley, Harvard, and over 200 schools and community organizations across the country. He is currently the Culture Shift Fellow with Movement Generation. Find out more at joshhealey.org. More details September 20, 2014 BikeMobile- FREE BIKE REPAIR! Description: "BikeMobile will bring FREE BIKE REPAIRS at Phat Beets Produce Saturday, Sept 20th from 9:30am-1:30pm. Bring your bike. We guarantee to serve the first 20 people that sign up, after that we will fix as many bikes as we have time for. We can fix flat tires, adjust brakes and gears, and even replace broken or worn out parts like chains, grips, and tires. Bike or no bike, it can be educational for all who show up." More details September 27th, 2014 Introduction to Community Based Restorative JusticeJoin the North Oakland Restorative Justice Council for a youth friendly 2 hour introduction to community based Restorative Justice. According to Fania Davis of Restorative Justice For Oakland Youth restorative justice is a philosophical framework and worldview, and it is also an approach to justice that emphasizes bringing together all affected by harm to address their needs and obligations and to heal the harm as much as possible. There will also be an overview to the work of the North Oakland Restorative Justice October 11, 2014 Decolonize Your Diet! Indigenous Peoples Day Celebration More details October 25, 2014 making kraut w/youth pickle co More details -- www.phatbeetsproduce.org 510-250-7957 ...connecting small farmers to urban communities Check out Feel the Beet! Farmers Market www.youtube.com/watch?v=Keawnad90aQ "...if you leave the crumbs alone and we organize, then we can take the whole loaf" Kwame Ture aka Stokely Carmichael -- www.phatbeetsproduce.org 510-250-7957 ...connecting small farmers to urban communities Check out Feel the Beet! Farmers Market www.youtube.com/watch?v=Keawnad90aQ "...if you leave the crumbs alone and we organize, then we can take the whole loaf" Kwame Ture aka Stokely Carmichael __._,_.___ Posted by: max cadji <max(a)phatbeetsproduce.org> Reply via web post •Reply to sender •Reply to group •Start a New Topic •Messages in this topic (1) Visit Your Group • Privacy • Unsubscribe • Terms of Use . __,_._,___

11 years

Re: [sudo-discuss] Let's finish moving into Sudo

by yar

On Sun, Jul 13, 2014 at 6:29 PM, yar <yardenack(a)gmail.com> wrote: > We've still got some things strewn around the basement A month later, this is still the case. Tomorrow (Sunday) at 6pm some Omni folks are throwing a basement-cleaning party. Things may get thrown out unless they are marked with a note or some blue masking tape. They also plan to cull the book collection, creating a pile of unwanted books to be recycled the following week. I highly recommend Sudoers attend and help out with this. Thanks.

11 years

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

sudo-discuss