تقدّم Jgroup نظام اتصالات مجموعة يدمج نموذج الغرض الموزّع Java RMI مع تقنية مجموعة الغرض (Object Group), و تتميّز بتزويدها مزايا هامّة تجعلها مناسبة لتطوير التطبيقات الشبكية الحديثة.
يضيف هذا البحث ميزة جديدة إلى Jgroup؛ و هي التعامل مع قواعد البيانات بالاعتماد على أدوات مقابلة الغرض العلائقية, حيث تتطلّب العديد من تطبيقات الانترنيت الحالية تخزين البيانات ضمن قواعد البيانات بالإضافة إلى إمكانية استرجاعها في وقت لاحق من خلال عمليات الاستعلام.
تعتبر Hibernate وEclipseLink من أدوات مقابلة الغرض الشائعة و المفتوحة المصدر, فيقدّم هذا البحث طريقة دمج قاعدة بيانات مع Jgroup بالاعتماد على هاتين الأداتين, كما يقارن بين أداء Jgroup المدمجة مع Hibernate و أداء Jgroup المدمجة مع EclipseLink من أجل أنماط استعلام متعددة. تظهر النتائج تفوق أداء Jgroup/EclipseLink على أداء Jgroup/Hibernate , حيث يمكن أن ينخفض زمن التأخير اللازم لتنفيذ الاستعلام مع EclipseLink إلى النصف تقريباً مقارنة مع Hibernate.
تقترح هذه المقالة تصميماً جديداً لإضافة خدمة دوام البيانات (Persistence) إلى Jgroup؛ و ذلك من خلال إدراج هذه الخدمة كطبقة ضمن طبقات مدير المجموعة المرتبط مع كلّ مخدّم عضو ضمن مجموعة غرض مخدم Jgroup.
Frame structuressystems contribute to resist the seismic loads. And there are many
techniques used to improve the resistance to lateral loads where steel shear walls,which is
embedded within the Frame span, are considered to be one of these ways.
This research aims to study the effect of strengthening of the reinforced concrete
frames by inserting partial steel plate shear walls, the opening is parallel to beams,
embedded within the frame. This study applied numerical analysis using Finite Element
Method (FEM) using nonlinear pushover analysis based on geometrical and Material Non-
Linear Analysis (GMNLA). Using these methods allow us to study the behavior of the
Partial steel plate that seal the whole span of the reinforced concrete frame with opening
parallel to beams against lateral loads.
This study conclude that using a partial steel plate shear wall, with opening parallel
to beams with reinforced- concrete frames can enhance the resistanceand the seismic
energy dissipation significantly.
References used
(ABAQUS, Version 6.12, ABAQUS/Standard User`s Manual, ABAQUS Inc USA (2012
CHOI R. PARK G, Cyclic Loading Test for Reinforced Concrete Frame with Thin Steel Infill Plate. Journal of Structure Engineering,(2011) 137:654-664
(EUROCODE 2: Design of concrete structures, Part 1-1: General rules and rules for buildings. Brussels,CEN (2008
Frame structures contribute to resist the seismic loads. On the other hand, many techniques were used to improve the resistance against lateral loads where steel shear walls are considered to be one of these ways.
This research aims to study the eff
Structural Frame system is considers as an earthquake resisting structural
systems. On the other hand, many techniques were used to improve the
resistance against lateral loads. where Steel Plate Shear Wall fixed within
frame span is one of those
Frame structures contribute to resist the seismic loads. On the other hand, frames
work efficiently to increase the ductility of buildings. Therefore, many techniques were
used to improve the resistance against lateral loads where steel shear walls
Braced frames and steel plate shear walls (SPSWs) have both been shown
to be useful in the seismic retrofit of buildings. While both
these systems have merit, no guidance exists to determine which of the
two approaches is preferable in terms of pr
This paper presents the shear behavior of lightweight concrete beams
without shear reinforcement produced by scoria aggregates. A total of nine
beams were tested under four-point loads, including three lightweight
concrete beams without steel fibers and six steel fiber reinforced
lightweight concrete beams.