diff --git a/client/application.js b/client/application.js
index 218f65e..0bbeb02 100644
--- a/client/application.js
+++ b/client/application.js
@@ -116,6 +116,11 @@
 
                 $('#search').click(onSearch);
 
+                $('#learnDlg').on('show.bs.modal', function() {
+                    $('#learn').prop('disabled', true);
+                    $('#keyword').val('');
+                });
+
                 $('#learn').click(onLearn);
                 $('#keyword').bind('input', function() {
                     $('#learn').prop('disabled', !$(this).val());
diff --git a/client/index.html b/client/index.html
index c2e012c..d300e67 100644
--- a/client/index.html
+++ b/client/index.html
@@ -51,7 +51,7 @@
                 </div>
             </div>
 
-            <div class="modal fade options-dlg" tabindex="-1">
+            <div class="modal fade" id="optionsDlg" tabindex="-1">
                 <div class="modal-dialog modal-sm">
                     <div class="modal-content">
                         <div class="modal-header"><big>Visualization Options</big></div>
@@ -74,15 +74,15 @@
                 </div>
             </div>
 
-            <div class="modal fade learn-dlg" tabindex="-1">
+            <div class="modal fade" id="learnDlg" tabindex="-1">
                 <div class="modal-dialog modal-sm">
                     <div class="modal-content">
                         <div class="modal-header"><big>Learn Keyword</big></div>
                         <div class="modal-body">
                             <div class="form-horizontal">
                                 <div class="form-group">
-                                    <label for="keyword" class="col-md-2 control-label">Name</label>
-                                    <div class="col-md-10">
+                                    <label for="keyword" class="col-md-4 control-label">Learn as</label>
+                                    <div class="col-md-8">
                                         <input class="form-control" type="text" id="keyword" name="keyword">
                                     </div>
                                 </div>
@@ -103,8 +103,8 @@
                     <div class="panel-heading">
                         <big>Semantic tweaks to <span id="query" class="text-primary"></span></big>
                         <div class="btn-group pull-right">
-                            <button class="btn btn-xs btn-success" data-toggle="modal" data-target=".learn-dlg">Learn...</button>
-                            <button class="btn btn-xs btn-default" data-toggle="modal" data-target=".options-dlg">Options...</button>
+                            <button class="btn btn-xs btn-success" data-toggle="modal" data-target="#learnDlg">Learn...</button>
+                            <button class="btn btn-xs btn-default" data-toggle="modal" data-target="#optionsDlg">Options...</button>
                         </div>
                     </div>
                     <div style="padding: 10px;" class="unselectable">
diff --git a/server/search.js b/server/search.js
index 9c4d7e6..fe24627 100644
--- a/server/search.js
+++ b/server/search.js
@@ -25,18 +25,7 @@ function scale(values, factor) {
     return result;
 }
 
-function normalize(values) {
-    var result = {};
-
-    for (var feature in values) {
-        var value = values[feature];
-        result[feature] = Math.max(-1.0, Math.min(1.0, value), value);
-    }
-
-    return result;
-}
-
-function combine(values1, values2) {
+function add(values1, values2) {
     var result = {};
 
     for (var feature in values1) {
@@ -157,26 +146,20 @@ function addKeyword(query, callback) {
     }
 
     getKeywords(function(keywords) {
-        var result = {
-            food:       0.0,
-            service:    0.0,
-            value:      0.0,
-            atmosphere: 0.0
-        };
-
+        var result = {};
         for (var param in query.params) {
             var features = scale(keywords[param], query.params[param]);
-            result = combine(result, features);
+            result = add(result, features);
         }
 
-        result = normalize(result);
+        result = scale(result, 1.0 / _.keys(query.params).length);
 
         var values = [
             query.keyword,
-            result.food,
-            result.service,
-            result.value,
-            result.atmosphere
+            result.food || 0.0,
+            result.service || 0.0,
+            result.value || 0.0,
+            result.atmosphere || 0.0
         ];
 
         connection.query('INSERT INTO keywords VALUES(?, ?, ?, ?, ?)', values, function(err) {