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Article
Immediate and Delayed Feedback and Their Effect on Learning Freestyle Swimming Movements for Beginner Students
التغذية الراجعة النهائية المباشرة (الفورية) والمتأخرة وأثرها في تعلم حركات السباحة الحرة للطلاب المبتدئين

Authors: مصطفى صلاح الدين --- سامر منصور جميل
Journal: journal of physical education مجلة التربية الرياضية ISSN: 20736452 Year: 2018 Volume: 30 Issue: 2 Pages: 315-328
Publisher: Baghdad University جامعة بغداد

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Abstract

The problem of the research was that the researchers noticed through the practical lessons of swimming class that there is a great variation in the grades of the students in the different study subjects according to the teaching of the section which may be due to the difference in how each teacher gives the corrective information, From one teaching to the next, which may be the reason for this variance between the levels of learners at the end of the academic season Thus, the present study aimed at finding the effect of using immediate and delayed feedback on the level of learning freestyle swimming movements in the subjects understudy. In addition to that, the research aimed at identifying the two types of feedback used (immediate and delayed) in learning freestyle swimming movements in the subjects. The researcher used the experimental method and the subjects were students of the physical education and sport Science College / University of Baghdad. The researchers concluded that immediate and delayed feedback has positive effects on learning freestyle swimming movements. Immediate feedback in the experimental group was better than the controlling group in the post-tests.

أشتملت مشكلة البحث ان الباحثين لاحظا من خلال الدروس العملية لمادة السباحة وجود تباين كبير في درجات الطلاب في الشعب الدراسية المختلفة باختلاف التدريسي المسؤول عن الشعبة التي قد يكون سببه اختلاف الكيفية التي يعطي بهاء كل مدرس المعلومات التصحيحية (التغذية الراجعة)، فضلا عن تباين وقت اعطائها من تدريسي لاخر الامر الذي قد يكون سببا لذلك التباين بين مستويات المتعلمين في نهاية الموسم الدراسي , وبهذا فقد هدفت الدراسة الحالية الى معرفة اثر اسنخدام التغذية الراجعة المتأخرة والنهائية الفورية (المباشرة) في مستوى تعلم حركات السباحة الحرة لدى عينة البحث. ومعرفة اي النوعين من التغذية الراجعة المستخدمة (النهائية المباشرة والمتاخر) الاكثر تاثير في تعلم حركات السباحة الحرة لدى عينة البحث وتمثلت عينة البحث اذ تم اختيارهم من مجتمع البحث من غير المتعلمين للسباحة ومن نفس المرحلة العمرية وباطوال واوزان متقاربة, وعلى اساس ذلك أستنتج الباحثان للتغذية الراجعة الفورية (المباشرة) والمتأخرة تأثيرا ايجابيا في تعلم حركات السباحة الحرة.فاعلية التغذية الراجعة الفورية في المجموعة الاولى لعينة البحث افضل من المجموعة الثانية في الاختبارات البعدية


Article
The effect of skill Exercises Enhanced by visual feedback in learning the skills of Passing and Shooting in futsal among second intermediate Grade Femals students An M.A.thesis extracted research
تأثير تمرينات مهارية معززة بالتغذية الراجعة البصرية في تعلم مهارتي المناولة والتهديف بكرة القدم الصالات لطالبات الثاني متوسط

Author: Adel Addas Theab / Israa Rifat Hussein عادل عباس ذياب / اسراء رفعت حسين
Journal: Al-Fatih journal مجلة الفتح ISSN: 87521996 Year: 2018 Volume: 14 Issue: 73 Pages: 118-136
Publisher: Diyala University جامعة ديالى

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Abstract

The skill training is the basis for students' learning of skills for all sports activities and not just football halls, if they are practiced in a systematic manner according to the correct scientific basis, and is specially tailored to suit the type of motor duty required of the student to perform or do, To provide information on the performance or skill to be learned or corrective information.The problem of research is the weakness of these skills among second grade students. Therefore, the researcher prepared skilled exercises to support feedback to address this problem. Therefore, the aim of the research is to identify the effect of exercise skills enhanced by visual feedback in learning the skills of handling, As for the research society, it represented 135 students for the second grade, average of the average of the students. The sample was (20) students from (A) and (20) students from (B).

ان التمرين المهاري هو الاساس في تعلم الطالبات للمهارات لجميع الفعاليات والألعاب الرياضية وليس لكرة القدم الصالات فقط ، إذا ما تمت ممارستهُ بشكل منظم على وفق اسس علمية صحيحة ، ويعد خصيصًا ليتوائم مع نوع الواجب الحركي المطلوب من الطالبة أدائه أو القيام به ، ويعزز بالتغذية الراجعة البصرية لتوفير معلومات عن الاداء او المهارة المراد تعلمها او معلومات تصحيحية . و تكمن مشكلة البحث في ضعف هاتين المهارتين لدى طالبات الصف الثاني المتوسط لذا قامت الباحثة باعداد تمارين مهارية معززة بالتغذية الراجعة لمعالجة هذه المشكلة , وعليه هدف البحث الى التعرف على اثر التمرينات المهارية المعززة بالتغذية الراجعة البصرية في تعلم مهارتي المناولة والتهديف بكرة القدم الصالات لطالبات المرحلة المتوسطة ، اما مجتمع البحث فتمثل بـ (135) طالبة للصف الثاني المتوسط من متوسطة الشهيدة ايمان ، فكانت العينة (20) طالبة من شعبة (أ) تجريبية ، و(20) طالبة من شعبة (ب) ضابطة .


Article
Robust Full State Feedback Controller Design Using H∞ for Inverted Pendulum System

Author: Abdul Muhsin M. Al Timimi
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2018 Volume: 18 Issue: 1 Pages: 39-48
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper presents the design of a full state feedback controller to an inverted pendulum system. The nonlinear and linearized models of the system are obtained. The main goal of the proposed controller is to maintain the pendulum in the upright position and achieve a desirable tracking for the cart position. To achieve desirable tracking properties an integral term is added. The robustness of the proposed controller is examined when a 20% variation in the parameters of system is considered.


Article
Robust and Efficient Dynamic Stream Cipher Cryptosystem

Authors: Abdullah Ayad Ghazi --- Faez Hassan Ali
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2018 Volume: 59 Issue: 2C Pages: 1105-1114
Publisher: Baghdad University جامعة بغداد

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Abstract

In this paper a new technique based on dynamic stream cipher algorithm is introduced. The mathematical model of dynamic stream cipher algorithm is based on the idea of changing the structure of the combined Linear Feedback Shift Registers (LFSR's) with each change in basic and message keys to get more complicated encryption algorithm, and this is done by use a bank of LFSR's stored in protected file and we select a collection of LFSR's randomly that are used in algorithm to generate the encryption (decryption) key. We implement Basic Efficient Criteria on the suggested Key Generator (KG) to test the output key results. The results of applying BEC prove the robustness and efficiency of the proposed stream cipher cryptosystem


Article
Experiences of 5th Year Students in Kerbala with Formative Mini-CEX

Author: Riyadh Dhayhood Mahdi Al Zubaidi
Journal: Karbala Journal of Medicine مجلة كربلاء الطبية ISSN: 19905483 Year: 2018 Volume: 11 Issue: 1 Pages: 3956-3961
Publisher: Kerbala University جامعة كربلاء

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Abstract

background: Formative work place assessment give opportunities to follow the progression of students learning through monitoring of their doing Aim: To know the experience of the 5th year students with the first year implementation of formative mini clinical evaluation exercise (mini-CEX).Method: It is a qualitative research. The information were collected from interview with students completed the internal medicine discipline of the fifth year during the academic year 2017 - 2018.Results: The participants were aware about the exam, the embarrassment of the exam and the presence of peer get less with subsequent examinations, and the encouraging feedback of the examiner exerted a positive effect on the learning process. The students explored the need to further training of clinical examination, in addition to adhering to instructions regarding the need to focus on educational goals. Some of the teachers did not administer the exam according to the instructions of mini – CEX. Conclusion: The experience resulting from the mini clinical evaluation exercise (mini-CEX) indicates positive results with regard to studentsʹ rush towards learning, a great opportunity for teachers to follow up the studentsʹ level and guidance, enhancement the studentsʹ communication skills, and the need of some teachers to adhere to the essence of this type of assessment.


Article
State Feedback Sliding Mode Controller Design for Human Swing Leg System
تأثير التغذيه الراجعه لمسيطر التحكم الانزلاقي لمنظومه الساق البشريه المتأرجحه

Authors: Hazem I. Ali حازم ابراهين علي --- Azhar J. Abdulridha أزهار جبار عبدالرضا
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2018 Volume: 21 Issue: 1 Pages: 51-59
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

In this paper, the robustness properties of sliding mode control (SMC) which is designed to produce a dynamic output feedback controller to achieve robustness for trajectory tracking of the nonlinear human swing leg system is presented. The human swing leg represents the support of human leg or the humanoid robot leg which is usually modeled as a double pendulum. The thigh and shank of a human leg will respect the pendulum links, hip and knee will connect the upper body to thigh and then shank respectively. The total moments required to move the muscles of thigh and shank are denoted by two external (servomotors) torques applied at the hip and knee joints. The mathematical model of the system is developed. The results show that the proposed controller can robustly stabilize the system and achieve a desirable time response specification.


Article
H-infinity Based Full State Feedback Controller Design for Human Swing Leg

Authors: Hazem I. Ali --- Azhar J. Abdulridha
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 3 Part (A) Engineering Pages: 350-357
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this paper, the robustness properties of H-infinity control to produce a dynamic output feedback controller is applied to a human swing leg system. The double pendulum structure is usually used to model this system. The pendulum links will represent the thigh and shank of a human leg. The upper body will be connected to the thigh and then the shank via hip and knee joints. The muscles of thigh and shank are moved by applied two external (servomotor) torques at the hip and knee joints. The mathematical model of the system is developed. The results show that the proposed controller can robustly stabilize the system and achieve a desirable time response specification. The results are obtained by using Matlab program and the achieved time response specifications are rise time tr=0.18 seconds, settling time ts=0.25 seconds and maximum over shoot Mp=0.03 for hip joint and tr=0.13 seconds, ts=0.21 seconds andMp=0.01 for knee joint.


Article
Optimal Fuzzy-Immune Fractional PID Control Scheme for Path Tracking of Robot manipulator

Authors: Turki Y.Abdalla تركي يونس عبدالله --- Woorod A. Shutnan ورود ادريس شطنان
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2018 Volume: 18 Issue: 2 Pages: 1-14
Publisher: Basrah University جامعة البصرة

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Abstract

This paper explains a new control structure based on theartificial immune system, Fuzzy and fractional order PIDcontrol schemes. In this paper immune feedback controlsystem, Fuzzy logic and fractional order control schemes will becombined and optimized using clonal selection algorithm.Fuzzy-immune fractional order PID Control schemes will beused as a new controller for path tracking of the robotmanipulator. The performance of the proposed control schemeis compared with fuzzy-immune PID control schemes. Theparameters of fractional PID and conventional PID controllersare optimized using Clonal Selection Algorithm (CSA).Simulation results state that optimal Fuzzy-immune fractionalPID is better than optimal fuzzy-immune PID Control schemesfor path tracking problem under the same condition. All controlschemes were tested using SIMULINK under MATLAB2014a


Article
Analyzing Cryptosystems by Using Artificial Intelligence

Authors: Ahmed Ayyoub Yousif --- Mohammed G. S. Al-Safi --- Faez Hassan Ali
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 00 Issue: 1 Pages: 100-108
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

This paper aims to apply the Bees Algorithm for solving system of equations. The solving System of Equations may be linear or nonlinear for a number of unknowns. As an application of System of Equations, we can implement cryptanalysis attack algorithms on stream cipher systems using plaintext attack (or part from it). We consider the Geffe System (which has nonlinear combining function) to be our study case, which is depend on set of Linear Feedback Shift Registers, as a model of stream cipher systems, in the performance of Bees Algorithm by solving System of Equations for any number of variables of the output of Linear Feedback Shift Registers.The application divided into two stages, first, constructing System of Equations for the suggested cryptosystem, and the second, is attacking the variables of System of Equations which they are also represent the initial key values of the combined of Linear Feedback Shift Registers.


Article
The impact of an educational program using direct mental training accompanied by delayed feedback in learning the technical performance and the level of achievement in the effectiveness of throwing the spear
تأثير برنامج تعليمي باسـتخـدام الـتدريـب العـقلـي الـمباشـر الـمصحـوب بالـتغذيـة الـراجعـة الـمتأخـرة فـي تعـلم الاداء الفـني ومـستوى الانـجاز فـي فعـاليـة رمـي الـرمـح

Author: Murad Ahmed Yas Saleh مراد احمد ياس صالح
Journal: JOURNAL OF SPORT SCIENCES مجلة علوم الرياضة ISSN: 20746032 Year: 2018 Volume: 10 Issue: 35 Pages: 184-205
Publisher: Diyala University جامعة ديالى

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Abstract

Target was searching:1 - Detection of the impact of the educational program using direct mental training and accompanied by delayed feedback in learning the technical performance and the level of achievement in the effectiveness of throwing javelin for students of the first year in the Faculty of Physical Education and Sports Sciences.2- To detect the difference between the post-test between the research groups (experimental and control) in learning the technical performance and the level of achievement in the effectiveness of throwing javelin for students of the first year in the Faculty of Physical Education and Sports SciencesThe hypothesis of the research was:1 - There are significant differences between the pre - and post - test of the impact of the educational program using direct mental training and accompanied by delayed feedback in learning technical performance and the level of achievement in the effectiveness of throwing javelin for students of the first year of the Faculty of Physical Education and Sports Sciences.2 - There are significant differences in the post-test in the educational program using direct mental training and accompanied by delayed feedback in learning the technical performance and the level of achievement in the effectiveness of throwing javelin for students of the first year of the Faculty of Physical Education and Sports Science.The researcher used the experimental method for his suitability to the nature of the research. He chose the research society and appointed him by the deliberate method of the students of the first year of the college of physical education and sports sciences / Tikrit University for the academic year 2016/2017, consisting of three divisions of 140 students. The research sample consisted of two divisions (80) students, divided into two groups of experimental and control according to their people. After conducting the tribal tests of the two groups, each group was identified with (20) students and researcher Counting the number of students not to reward them with the rest of the sample bringing the number of respondents (36 students) and by 18 students per group and the rate of (45%) Of students in the first year of study and then used the researcher statistical means (statistical bag spss to extract (the mean of the calculation, the standard deviation, the simple correlation coefficient (Pearson), test (T) between two linked accountants (and percentage)

الملخصيرى الباحث من خلال مزاولته مهنة التدريس لالعاب الساحة والميدان ان الطلاب يحتاجون الى تغيير في الاسلوب وطريقة التعليم لذا عمل على اضافة متغيرات جديدة على العملية التعليمية منها التدريب العقلي وكذلك التغذية الراجعة المتأخرة اذ تشير المصادر والدراسات الى ملائمة التدريب العقلي للمبتدئين ودراسات اخرى تشير الى اهمية التغذية الراجعة لذا تبلورة فكرة لدى في استخدامهما معاً في البرنامج التعليمي أذ تكمن مشكلة البحث في الإجابة عن السؤال الآتي:هل أن استخدام البرنامج تعليمي المضاف الية(التدريب العقلي المباشر والمصحوب بالتغذية الراجعة المتأخرة ) أو(البرنامج التعليمي المقرر) وأيهما سيؤدي إلى نتائج أفضل في تعلم الأداء الفني ومستوى الانجاز في فعالية رمي الرمح لطلاب السنة الدراسية الاولى في كلية التربية البدنية وعلوم الرياضة–جامعة تكريت فاستخدم الباحث الـمنهـج التـجـريـبي لـملاءمـته لـطبيـعة الـبحـث وكان اختيارمجـتمـع البحـث وعيـنتـه بالـطريقـة العـمدية مـن طـلاب الـسنة الـدراسـية الاولـى لـكلية التربية البدنية وعلوم الرياضة/جـامعة تـكريت للعـام الـدراسي 2016 / 2017 والمـتكونـة من ثـلاث شـعب والـبالغ عـددهم (140) طـالب ، أمـا عيـنة البحـث وكانـت شعـبتيـن اختيـرت بـالطـريقة العـشوائية وهـي(ب ، ج) والـبالغ عـددهم(80) طـالباً، موزعيـن على مجـموعتـين تجريـبية وضابطـة عـلى وفـق شعـبهم وبـعد اجـراء الاختـبارات الـقبلية لـلمجموعتين ، تـم تحـديد كل مجمـوعة بـ (20) طـالب والـباحـث استـبعد عـدد مـن الطـلاب لعـدم تكـافـؤهم مـع بقـية أفـراد العيـنة فأصـبح عـدد أفـراد العيـنة (36) طالـباً وبـواقـع (18) طالـباً لـكل مجـموعة وبنـسبة بلـغت(45%) مـن طـلاب الـسنة الـدراسيـة الاولـى ومن ثم استخدم الباحث الوسائل الاحصائية (الحقيبة الاحصائية spss لاستخراج(الوسـط الحـسابي ، الانحـراف المعـياري ، معـامـل الارتـباط الـبسيـط( بيرسـون) ، اخـتبار (ت) بـين وسطـين حسـابييـن مـرتبـطـين) ثم النـسبة المـئوية)

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