A PHP Error was encountered
Severity: Notice
Message: Trying to get property 'country_code' of non-object
Filename: core/MY_Controller.php
Line Number: 194
Backtrace:
File: /opt/apache/www/onlinebutterfly.education/application/core/MY_Controller.php
Line: 194
Function: _error_handler
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 8
Function: __construct
File: /opt/apache/www/onlinebutterfly.education/index.php
Line: 292
Function: require_once
A PHP Error was encountered
Severity: Notice
Message: Trying to get property 'ArabicName' of non-object
Filename: controllers/Article.php
Line Number: 395
Backtrace:
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 395
Function: _error_handler
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 236
Function: get_cat
File: /opt/apache/www/onlinebutterfly.education/index.php
Line: 292
Function: require_once
A PHP Error was encountered
Severity: Notice
Message: Trying to get property 'CategoryId' of non-object
Filename: controllers/Article.php
Line Number: 396
Backtrace:
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 396
Function: _error_handler
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 236
Function: get_cat
File: /opt/apache/www/onlinebutterfly.education/index.php
Line: 292
Function: require_once
A PHP Error was encountered
Severity: Notice
Message: Trying to get property 'ParentCategoryId' of non-object
Filename: controllers/Article.php
Line Number: 397
Backtrace:
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 397
Function: _error_handler
File: /opt/apache/www/onlinebutterfly.education/application/controllers/Article.php
Line: 236
Function: get_cat
File: /opt/apache/www/onlinebutterfly.education/index.php
Line: 292
Function: require_once
من النموذج إلى الأصل - موسوعة الفراشة
من النَّموذج إلى الأصل
عندما تنجحُ تجاربُ النَّموذج المصَغَّر، ويتمُّ تقصِّي إمكانيَّة إنتاج المادةِ المطلوبة بتكلفةٍ زهيدة، يُكَبَّر قياس تجهيزات النموذج وعمَليّاتِه لإنْشاء المَصْنَع الحقيقي.
لقراءة كامل المقال يرجى الاتصال بالشخص المسؤول.
المَركَبات الطّائرة
لم تَكُنْ تَستَطيعُ أن تَطيرَ في إجازةٍ قبلَ اختِراعِ المَركَباتِ الطّائرةِ! الطّائراتُ وطائراتُ الهِليكوپتَر والمَنا...
اقرأ
المزيد
هَمفري دِيڤي
اشتُهِر هَمفري دِيڤي (1778-1829)، الكيميائي الإنجليزي، باختراعه مِصباح الأمان للمُعَدِّنين الذي يحمل اسمه؛ لكنه كان أ...
اقرأ
المزيد
