diff --git a/app/assets/javascripts/Jit/jit2.0.0.js b/app/assets/javascripts/Jit/jit2.0.0.js
index 7a078b96..1ce1ba4a 100644
--- a/app/assets/javascripts/Jit/jit2.0.0.js
+++ b/app/assets/javascripts/Jit/jit2.0.0.js
@@ -8321,7 +8321,7 @@ Layouts.ForceDirected = new Class({
     if(incremental) {
       (function iter() {
         for(var total=incremental.iter, j=0; j<total; j++) {
-          opt.t = opt.tstart * (1 - i++/(times -1));
+          opt.t = opt.tstart * (1 - (i++)/(times -1));
           that.computePositionStep(property, opt);
           if(i >= times) {
             incremental.onComplete();
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index e4f3e19c..ef25a477 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -15,14 +15,6 @@ class ApplicationController < ActionController::Base
       session[:previous_url] = request.fullpath
     end
   end
-
-  def after_sign_in_path_for(resource)
-    session[:previous_url] || root_path
-  end
-  
-  def after_sign_up_path_for(resource)
-    root_path
-  end
   
 private
 
diff --git a/app/controllers/registrations_controller.rb b/app/controllers/registrations_controller.rb
new file mode 100644
index 00000000..7062ead0
--- /dev/null
+++ b/app/controllers/registrations_controller.rb
@@ -0,0 +1,12 @@
+class RegistrationsController < Devise::RegistrationsController
+  protected
+  
+  def after_sign_in_path_for(resource)
+    session[:previous_url] || root_path
+  end
+  
+  def after_sign_up_path_for(resource)
+    root_path
+  end
+  
+end
diff --git a/config/routes.rb b/config/routes.rb
index bb8aaaec..58e1d0fc 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -33,12 +33,12 @@ ISSAD::Application.routes.draw do
   match 'maps/:id/embed', to: 'maps#embed', via: :get, as: :embed
   match 'maps/:id/:format', to: 'maps#json', via: :get, as: :json
   
-  devise_for :users, :path_names => { :sign_in => 'login', :sign_out => 'logout' }
+  devise_for :users, :controllers => { :registrations => "registrations" }, :path_names => { :sign_in => 'login', :sign_out => 'logout' }
   devise_scope :user do
     get "sign_out", :to => "devise/sessions#destroy"
   end
   
-  resources :users, except: :show
+  resources :users, except: [:show, :index]
 
   resources :mappings