# Latest **URL:** https://www.ruby-forum.com/latest.md?page=524 [Latest](https://www.ruby-forum.com/latest.md) · [Categories](https://www.ruby-forum.com/categories.md) · [Tags](https://www.ruby-forum.com/tags.md) **Page:** 525 --- ## [R: Re: around empty subcarrier in 802.11n implementation](https://www.ruby-forum.com/t/r-re-around-empty-subcarrier-in-802-11n-implementation/236883)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 9, 2013, 10:52am UTC](https://www.ruby-forum.com/t/r-re-around-empty-subcarrier-in-802-11n-implementation/236883 "2013-10-09T10:52:08Z")
Thanks for your answer. I’m a computer scientist, so I’m not so aware of what DC-offset exactly means, but I’m going to try this tuning. I’ll let you know if I solve the problem. Best regards Francesca ----Messaggi… --- ## [New Application, iTunes like application, MVC architecture](https://www.ruby-forum.com/t/new-application-itunes-like-application-mvc-architecture/236882)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [October 9, 2013, 10:28am UTC](https://www.ruby-forum.com/t/new-application-itunes-like-application-mvc-architecture/236882 "2013-10-09T10:28:45Z")
Hey guys! I am a little new and developing a new lightweight application and am curious about my structure. I want users to add songs and also be able to make playlists. If they so choose, the songs in the library ca… --- ## [AM transmitter](https://www.ruby-forum.com/t/am-transmitter/236871)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 9, 2013, 10:10am UTC](https://www.ruby-forum.com/t/am-transmitter/236871 "2013-10-09T10:10:38Z")
Hi, I’m new user of GNU. Can someone please help me in creating a flowgraph of AM transmitter. I have to use it for communication of radio having a range 3-30 MHz. Receiver part is already done. I just wanted a wave… --- ## [Scandinavian workshop on testbed based wireless research, Stockholm, November 27th, 2013](https://www.ruby-forum.com/t/scandinavian-workshop-on-testbed-based-wireless-research-stockholm-november-27th-2013/246399)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [October 9, 2013, 9:23am UTC](https://www.ruby-forum.com/t/scandinavian-workshop-on-testbed-based-wireless-research-stockholm-november-27th-2013/246399 "2013-10-09T09:23:53Z")
Dear list, The Scandinavian workshop on testbed based wireless research aims to bring together researchers from academy, research institutes and industry, who use testbeds such as USRP, WARP and others, to address re… --- ## [Accessing Class Methods](https://www.ruby-forum.com/t/accessing-class-methods/236876)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [October 9, 2013, 9:23am UTC](https://www.ruby-forum.com/t/accessing-class-methods/236876 "2013-10-09T09:23:17Z")
Please consider the following snippet of code: class Parent def self.parent\_greeting return ‘Hello, from the Parent class.’ end end class Child \< Parent def self.child\_greeting() return ‘Hello, from Child class.’ … --- ## [How to patch ruby's gem before an install?](https://www.ruby-forum.com/t/how-to-patch-rubys-gem-before-an-install/222731)
**Author:** [@aris](https://www.ruby-forum.com/u/aris)\ **Replies:** 10\ **Last updated:** [October 9, 2013, 9:23am UTC](https://www.ruby-forum.com/t/how-to-patch-rubys-gem-before-an-install/222731 "2013-10-09T09:23:03Z")
Hi, got stuck and cann’t find appropriate guide how can I patch gem package before it gets installed. For example I’m trying to fix gem for Gosu library: download the gem with “gem fetch gosu” extract contents of th… --- ## [How to integrate a specific number of vectors element-wise in gnuradio?](https://www.ruby-forum.com/t/how-to-integrate-a-specific-number-of-vectors-element-wise-in-gnuradio/235470)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 8\ **Last updated:** [October 9, 2013, 8:59am UTC](https://www.ruby-forum.com/t/how-to-integrate-a-specific-number-of-vectors-element-wise-in-gnuradio/235470 "2013-10-09T08:59:21Z")
Dear Gnuradio enthusiasts, Short version: Does someone have a good approach to average a specific (but large) number of vectors together element-wise with the exactly same relative weight? Say I want the two vector… --- ## [JOBS: Urgent RoR developer required to work on existing Rails platform to integrate booking system a](https://www.ruby-forum.com/t/jobs-urgent-ror-developer-required-to-work-on-existing-rails-platform-to-integrate-booking-system-a/236881)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 9, 2013, 8:31am UTC](https://www.ruby-forum.com/t/jobs-urgent-ror-developer-required-to-work-on-existing-rails-platform-to-integrate-booking-system-a/236881 "2013-10-09T08:31:53Z")
Hi We urgently need a very good RoR developer - ideally new graduate - as we bridge the skills gap between University and real World Of Work experience by engaging top students and graduates from IT, Digital, Web and… --- ## [Websockets versus ajax polling?](https://www.ruby-forum.com/t/websockets-versus-ajax-polling/236846)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 9, 2013, 8:31am UTC](https://www.ruby-forum.com/t/websockets-versus-ajax-polling/236846 "2013-10-09T08:31:52Z")
I recall I did a small project a couple of years ago with websockets/faye plugin. It was a little complex, but I was wondering if many people use websockets in stead of what seems like the more typical ajax polling an… --- ## [\[Jobs\] Ruby on Rails freelance developer needed](https://www.ruby-forum.com/t/jobs-ruby-on-rails-freelance-developer-needed/236880)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 9, 2013, 8:31am UTC](https://www.ruby-forum.com/t/jobs-ruby-on-rails-freelance-developer-needed/236880 "2013-10-09T08:31:17Z")
We are looking for developers who could undertake the development of a POS application on Ruby on Rails framework. The web application will have the following features: View sales performance by time and location. R… --- ## [OpenSSL Cookbook v1.1 released (by Ivan Rictic)](https://www.ruby-forum.com/t/openssl-cookbook-v1-1-released-by-ivan-rictic/236879)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 9, 2013, 8:20am UTC](https://www.ruby-forum.com/t/openssl-cookbook-v1-1-released-by-ivan-rictic/236879 "2013-10-09T08:20:46Z")
Hi List, for thos of your who have to deal with SSL there is a goodie, released by Ivan Ristic; see from the Blog: OpenSSL Cookbook is a free ebook based around one chapter of my in-progress book Bulletproof SSL/T… --- ## [Ruby On Rails Online Training](https://www.ruby-forum.com/t/ruby-on-rails-online-training/236878)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 9, 2013, 6:43am UTC](https://www.ruby-forum.com/t/ruby-on-rails-online-training/236878 "2013-10-09T06:43:29Z")
Ruby On Rails Course contents Database - basic HTML / CSS Caching & Routing ROR-Architecture HTML / CSS More about Ruby Ruby oops ROR Validations & callbacks XHTML/CSS Ajax Ruby oops SVN Visit: http://www.2… --- ## [Ruby 2.0.1 preview install problem](https://www.ruby-forum.com/t/ruby-2-0-1-preview-install-problem/246357)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [October 9, 2013, 2:43am UTC](https://www.ruby-forum.com/t/ruby-2-0-1-preview-install-problem/246357 "2013-10-09T02:43:01Z")
I’ve compiled Ruby 2.0.1preview1 but make install produces this: ruby: invalid option --disable=gems (-h will show valid options) make: \*\*\* \[known\_errors.inc\] Error 2 How to fix? gvim --- ## [PFB Arbitrary Resampler](https://www.ruby-forum.com/t/pfb-arbitrary-resampler/236875)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 9, 2013, 1:08am UTC](https://www.ruby-forum.com/t/pfb-arbitrary-resampler/236875 "2013-10-09T01:08:13Z")
In the benchmark\_tx.py code for MPSK modulation, the pfb\_arbitrary\_resampler block is instantiated with 32 \* 11 \* floor(samples\_per\_symbol) taps. I understand that 32 is the number of filters in the filterbank, but I’… --- ## [Nginx-1.4.3](https://www.ruby-forum.com/t/nginx-1-4-3/246402)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 2\ **Last updated:** [October 9, 2013, 12:54am UTC](https://www.ruby-forum.com/t/nginx-1-4-3/246402 "2013-10-09T00:54:46Z")
Changes with nginx 1.4.3 08 Oct 2013 \*) Bugfix: a segmentation fault might occur in a worker process if the ngx\_http\_spdy\_module was used with the “client\_body\_in\_file\_only” … --- ## [CSV to XML questions builder gem](https://www.ruby-forum.com/t/csv-to-xml-questions-builder-gem/236807)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 21\ **Last updated:** [October 8, 2013, 9:56pm UTC](https://www.ruby-forum.com/t/csv-to-xml-questions-builder-gem/236807 "2013-10-08T21:56:33Z")
Hi all! I’m converting a csv file to an xml with the code below. This works fine. Maybe it can be done differently and better but it works for me. I have three questions: 1 - Why cant I re-use “csv” within “builder.t… --- ## [GNU Radio training class opening](https://www.ruby-forum.com/t/gnu-radio-training-class-opening/236872)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 8, 2013, 9:19pm UTC](https://www.ruby-forum.com/t/gnu-radio-training-class-opening/236872 "2013-10-08T21:19:08Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [PostGIS 2.1 rasters available to Rails code: breadcrumbs](https://www.ruby-forum.com/t/postgis-2-1-rasters-available-to-rails-code-breadcrumbs/236874)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 8, 2013, 9:17pm UTC](https://www.ruby-forum.com/t/postgis-2-1-rasters-available-to-rails-code-breadcrumbs/236874 "2013-10-08T21:17:58Z")
Just wanted to post this in case someone else was faced with the same problem. It’s database-specific code, worse, it’s specific to a particular \* version\* of a particular extension to a particular database, wires in … --- ## [Re: gr\_firdes.cc/firdes.cc - window functions - flawe](https://www.ruby-forum.com/t/re-gr-firdes-cc-firdes-cc-window-functions-flawe/246400)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [October 8, 2013, 8:26pm UTC](https://www.ruby-forum.com/t/re-gr-firdes-cc-firdes-cc-window-functions-flawe/246400 "2013-10-08T20:26:33Z")
$ git diff v3.6.3 HEAD gr-filter/lib/firdes.cc (but modified since you remain @ v3.6.3) diff --git a/gr-filter/lib/firdes.cc b/gr-filter/lib/firdes.cc index 5c3320d…d55a4ba 100644 — a/gr-filter/lib/firdes.cc +++ b/… --- ## [Easier java constructors?](https://www.ruby-forum.com/t/easier-java-constructors/246390)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [October 8, 2013, 7:10pm UTC](https://www.ruby-forum.com/t/easier-java-constructors/246390 "2013-10-08T19:10:12Z")
It might be interesting (if it doesn’t have this feature already) to be able to specify named parameters in java type constructors, a la http://www.jython.org/archive/21/docs/properties.html frame = awt.Frame.new(size… --- ## [Avoiding jargon how might GNUradio, software defined radio be explained to AM-FM radio listeners unf](https://www.ruby-forum.com/t/avoiding-jargon-how-might-gnuradio-software-defined-radio-be-explained-to-am-fm-radio-listeners-unf/246380)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [October 8, 2013, 6:36pm UTC](https://www.ruby-forum.com/t/avoiding-jargon-how-might-gnuradio-software-defined-radio-be-explained-to-am-fm-radio-listeners-unf/246380 "2013-10-08T18:36:42Z")
Avoiding jargon how might GNUradio, software defined radio be explained to AM-FM radio listeners unfamiliar with technology generally? Already checked relatively more technical material at http://gnuradio.org/redmine/… --- ## [Energy detection based spectrum sensing](https://www.ruby-forum.com/t/energy-detection-based-spectrum-sensing/236873)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 8, 2013, 6:19pm UTC](https://www.ruby-forum.com/t/energy-detection-based-spectrum-sensing/236873 "2013-10-08T18:19:45Z")
Hello every one… can any buddy say , is it possible to make simulation of enegergy detection based spectrum sensing without USRP or Fun-cube dongle …??? if , yes . How? guide me… as per my opinion … --- ## [Capture 2xx response from proxy and rewrite](https://www.ruby-forum.com/t/capture-2xx-response-from-proxy-and-rewrite/236869)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 8, 2013, 5:55pm UTC](https://www.ruby-forum.com/t/capture-2xx-response-from-proxy-and-rewrite/236869 "2013-10-08T17:55:12Z")
Hi, Is it possible to catch a 2xx response from a upstream proxy and rewrite the response? We’re able to do this with 4xx and 5xx responses using proxy\_intercept\_errors and error\_page, but I haven’t found an equival… --- ## [Resampling with USRP](https://www.ruby-forum.com/t/resampling-with-usrp/236860)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 5\ **Last updated:** [October 8, 2013, 4:43pm UTC](https://www.ruby-forum.com/t/resampling-with-usrp/236860 "2013-10-08T16:43:54Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Reconfigure FIR coefficients without stopping the sampling process](https://www.ruby-forum.com/t/reconfigure-fir-coefficients-without-stopping-the-sampling-process/236870)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 8, 2013, 4:19pm UTC](https://www.ruby-forum.com/t/reconfigure-fir-coefficients-without-stopping-the-sampling-process/236870 "2013-10-08T16:19:54Z")
Hello Everyone, I have a quick question regarding the reconfiguration of blocks within a gnuradio “top block” application. I am working on a radar system that will occasionally attempt to switch transmission wavefor… --- ## [Capybara throws printer errors with every test](https://www.ruby-forum.com/t/capybara-throws-printer-errors-with-every-test/236843)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [October 8, 2013, 3:18pm UTC](https://www.ruby-forum.com/t/capybara-throws-printer-errors-with-every-test/236843 "2013-10-08T15:18:06Z")
I am in the process of upgrading from Rails 3 to 4. Whenever I run a test I always get two errors like this: Capybara::Rails::TestCase#test\_printer\_url: ActionController::UrlGenerationError: No route matches {:action=\>… --- ## [\[jobs\] Bewe cerca uno sviluppatore Rails/Ruby](https://www.ruby-forum.com/t/jobs-bewe-cerca-uno-sviluppatore-rails-ruby/236865)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 8, 2013, 2:54pm UTC](https://www.ruby-forum.com/t/jobs-bewe-cerca-uno-sviluppatore-rails-ruby/236865 "2013-10-08T14:54:33Z")
Buon giorno a tutti, Qualche mese fa ho iniziato a collaborare con Bewe come Architect e adesso stiamo cercando degli sviluppatori Rails/Ruby per un progetto molto interessante. Ecco l’annuncio con i dettagli: htt… --- ## [Ayuda! --\> error Mysql2::error](https://www.ruby-forum.com/t/ayuda-error-mysql2-error/221331)
**Author:** [@aris](https://www.ruby-forum.com/u/aris)\ **Replies:** 3\ **Last updated:** [October 8, 2013, 2:42pm UTC](https://www.ruby-forum.com/t/ayuda-error-mysql2-error/221331 "2013-10-08T14:42:42Z")
Hola, estoy haciendo un proyecto en ruby on rails. Tengo instalado MySQL server 5.0 e hice la base de datos en MySQL. El problema viene cuando intento ejecutar el proyecto y me da el siguiente error: Mysql2::Error C… --- ## [How to ensure good performance for the first X number of visitors](https://www.ruby-forum.com/t/how-to-ensure-good-performance-for-the-first-x-number-of-visitors/236863)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 2\ **Last updated:** [October 8, 2013, 2:40pm UTC](https://www.ruby-forum.com/t/how-to-ensure-good-performance-for-the-first-x-number-of-visitors/236863 "2013-10-08T14:40:31Z")
Hi all, I’m looking for some guidance with Nginx. We have inherited a web-server that experiences heavy load. The server is running: Ubuntu Server 12.4, 24 Cores, 50~GB RAM. The CPU usage during peak time is 100%. M… --- ## [Graceful backend shutdown](https://www.ruby-forum.com/t/graceful-backend-shutdown/236839)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 3\ **Last updated:** [October 8, 2013, 2:38pm UTC](https://www.ruby-forum.com/t/graceful-backend-shutdown/236839 "2013-10-08T14:38:46Z")
Hi all! I’m using Nginx as a reverse proxy and loadbalancer with 2 backends. Sometimes I need to turn off one of the apps server. And I need to do it gracefully, that when I comment one server in Nginx config, Nginx m… [Previous page](https://www.ruby-forum.com/latest.md?page=523) [Next page](https://www.ruby-forum.com/latest.md?page=525)