JSON with Angular JS don't work (Ionic & Cordova)

I'm trying to download a JSON with their data, but for some reason will not run, and the entire application breaks. And I'd like when Pull to refresh all the information JSON is refreshed.

This is Services.js:

angular.module('starter.services', [])

.factory('NotasService', function($resource,$http) {
return {

  all: function() {
    var items_nota;
      $http.get('http://betamediagroup.net/apps/canalDiez/estructura.json ')
          .success(function(data) {
           items_nota = data.datos;
          });
       return items_nota;
       },
     get: function(notaId) {
    // Simple index lookup
       return items_nota[notaId];
     }
      }
    });

This is Controller.js

    angular.module('starter.controllers', [])

.controller('ActulidadCtrl', function($scope, NotasService, $timeout) {

    $scope.items_nota = NotasService.all();
    $scope.isActualidad = function(items_nota) {
        return items_nota.category === "ahora";
    };

    //Pull tu refresh
        $scope.doRefresh = function() {

        console.log('Actualizando!');
        $timeout( function() {

        $scope.items_nota.push({
          id: 3,
          titulo: 'Balcarce: Marangoni en los 70 años del Banco Provincia.',
          fecha: '03 nov 09.30',
          foto: 'actualidad_marangoni'
        });
        $scope.items_nota.push({
          id: 4,
          titulo: 'Temporal: el Gobierno Provincial asiste a los daminficados.',
          fecha: '03 nov 09.00',
          foto: 'actualidad_temporal'
        });
        //Stop the ion-refresher from spinning
        $scope.$broadcast('scroll.refreshComplete');

        });

    };
})

And this is template view:

<ion-view>
    <ion-nav-buttons side="left">
        <button menu-toggle="left" class="button button-icon icon ion-navicon"></button>>
    </ion-nav-buttons>

    <ion-content class="has-header">
        <ion-refresher on-refresh="doRefresh()" pulling-text="Tire para actualizar..." refreshing-text="Actualizando!" refreshing-icon="ion-loading-c">
        </ion-refresher>
        <ion-list>    
            <ion-item ng-repeat="item in items_nota" href="#/app/nota/{{item.id}}">
                <img src="img/{{item.foto}}">
                <h2>{{item.titulo}}</h2>
                <p >{{item.fecha}}</p>
            </ion-item>
        </ion-list>
    </ion-content>
</ion-view>

Try this

.factory('NotasService', function($resource,$http) {
    var items_nota;

    $http.get('http://betamediagroup.net/apps/canalDiez/estructura.json ')
        .success(function(respuesta) {
      items_nota = respuesta.data;
    });
  };

  return {
    all: function() {
      return items_nota;
    },
    get: function(notaId) {
      // Simple index lookup
      return items_nota[notaId];
    }
  }
});

The rason of application breaks is you didnt pass $http in your service

1- you have a small typo

2- you must pass $http to your factory

3- your items_nota should be equal to the data dotas array not to the request data 

.factory('NotasService', function($resource,$http) {
     return {

all: function() {
  var items_nota;
    $http.get('http://betamediagroup.net/apps/canalDiez/estructura.json ')
        .success(function(data) {
         items_nota = data.datos;
        });
     return items_nota;
     },
   get: function(notaId) {
  // Simple index lookup
     return items_nota[notaId];
   }
    }
  });