The information related to the effects of psychological stressors on the recovery of injured athletes is essential to discovering the problems the athletes face. The paper provides various information related to the impact of psychological stressors on the recovery of injured athletes from global publications. There are a total of 30 articles have been reviewed and summarized. There are also 50 references used to support the effects of psychological stressors on the recovery of injured athletes. The purpose of providing information related to psychological stressors’ impact on recovering injured papers is to show how athletes change their lives after recovering from the injuries and the effects of injuries. Many types of research conducted in the past have shown different research outcomes to measure the life of the athletes after recovering from the injury. Some studies showed that athletes continue to join the sports after being injured. Some research showed athletes stopped joining sports or changed their lifestyles after recovering from the injury. The stressors caused by the injury may result in fear and anxiety among most athletes. The psychological stressor symptoms will be discussed and reviewed in the paper to other research outcomes. At the end of the article, a common finding about psychological stressors toward the cognitive recovery of injured athletes will be shown. These common findings can reference other research on the same field of study.

الخلاصة

يمكن العثور على نفايات البوليمر، التي تستغرق وقتًا لتتحلل، في كل مكان حيث يستخدمها جميع البشر تقريبًا وفي الوقت الحاضر، تتزايد كمية النفايات المصنوعة من البوليمر يومًا بعد يوم مع زيادة عدد سكان العالم مما يؤدي إلى زيادة استهلاك هذه المنتجات. وهذه الزيادة تؤدي إلى استنفاذ الموارد الطبيعية مثل الخشب والبترول بسرعة. وإدراكًا لذلك تم تقديم فكرة إعادة التدوير كطريقة للحد من المشاكل التي تنشأ من عدم إعادة تدويرها. ومن خلال عملية إعادة التدوير، يمكن الحفاظ على الموارد الطبيعية للاستخدام المستقبلي. كما تقلل إعادة التدوير من كمية النفايات وتساعد في مواجهة مشكلة تراكم القمامة وتقلل تكلفة المنتج أيضا لأن تصنيع المنتج من المواد الخام إلى المنتج النهائي يصبح مكلفًا بمرور الوقت. فالمنتجات المعاد تدويرها أرخص دائمًا. ومع ذلك، فإن اختيار إعادة تدوير البوليمر يتطلب الأخذ بعين الاعتبار بعض المعلومات المتعلقة بخصائص مواد النفايات مثل حجمها، وموقعها، وطبيعتها، ودرجة التلوث بالملوثات، ووجود فرص السوق. بناءً على هذه المشكلة، يتم إجراء هذه الدراسة من أجل تطوير مركب من المواد المعاد تدويرها مثل البولي إثيلين منخفض الكثافة المعاد تدويره ونشارة الخشب وكذلك التحقق من ملائمة هذه المجموعة لإعادة البناء. علاوة على ذلك، تحاول هذه الدراسة التطوير والتحقيق في مدى ملائمة استخدام البولي اثيلين المعاد تدويره المملوء داخله نشارة الخشب في تصنيع الألواح الخشبية مع التركيز على الاستقرار والمتانة مع التركيبات المختلفة من خلال دراسة خصائصه من أجل تطوير وتحسين الاستخدام المحتمل لهذا المركب في المستقبل. تم إنتاج عينات من الألواح خلال زيادة نسبة المعزز من النشار بمقدار 10٪ إلى 30٪ إلى 50٪ عند 190 درجة مئوية وضغط 19 كجم / سم2 وزمن الضغط من 9 إلى 12 دقيقة. ومن خلال ذلك تم تحديد الخصائص الميكانيكية لقوة الانحناء، وقوة الشد، وخصائص قوة تأثير الألواح. حيث أظهرت النتائج أن أعلى قيمة لمقاومة الشد 7.87(ميجا باسكال) وقيمة قوة الانحناء 19.80 (ميجا باسكال) وتم الحصول عليها من لوح مكون من 30٪ نشارة الخشب المملوءة في مركب البولي إثيلين منخفض الكثافة المعاد تدويره. وسب ذلك يرجع إلى التوزيع الموحد للمعزز في مركب البولي إثيلين منخفض الكثافة المعاد تدويره هو العامل الرئيسي لتحسين الخصائص الميكانيكية.                                                                            

ABSTRACT

Polymer waste, which takes time to degrade, can be found everywhere as it is used by almost all human being. Nowadays, the amount of garbage or waste that is made of polymer is increasing day after day as the world’s population increases resulting in more consumption these products. This increase of polymer products demand causes natural resources such as wood and petroleum to deplete fast. Realizing this, recycling is introduced as a way to curb the problems that arise. Through the process of recycling, natural resources can be preserved for future use. Also, recycling reduces the amount of waste produce and can help to encounter garbage accumulation problem. It also reduces the cost since manufacturing product from raw material to finished product is getting expensive as time passes. The recycled products are always cheaper. However, the choice of recycling polymer requires taking into consideration some information regarding the characteristics of the waste materials such as scale of the deposit, its location, its nature, degree of contamination by pollutants, and the existence of market opportunities. Based on this problem, this study is done in order to develop composite from recycled material such as WSD and recycled low density polyethylene rLDPE as well as checking this combination’s suitability for refactoring. Furthermore, this study attempts to develop and investigate the suitability of using WSD filled rLDPE in wood board manufacturing with focus on stability and durability with various composite formulations through studying the properties of WSD and rLDPE in order to develop and improve the potential usage of this composite in the future. The composite board is produced by hot pressing the extruded sample by increasing the percentage of WSD from 10 wt%, 30 wt% and 50 wt% at 190°C temperatures and pressure of 19 Kg/cm2 for pressing time 9 to 12 min. The mechanical properties: flexural strength, tensile strength, impact strength properties of boards are determined. The results show that the highest value of tensile strength 7.87 (MPa), and value of flexural strength of 19.80(MPa) are obtained from board of 30 % wood saw dust filled Recycled Low Density Polyethylene composite. The uniform distribution of WSD filler in rLDPE composites is the major factor responsible for the improvement in the mechanical properties.

Keywords: Recycled Low-Density Polyethylene (rLDPE), wood saw dust WSD, Extruder, recycling, filler.

In this present work, the effect of variation of parts (pulp and peel) on photochemical 

compounds such as phenolics and flavonoids content of the banana flours were 

studied. The results exhibited that different varieties did exhibit significant differences 

on TPC as well as TFC which means that different sample yielded different values of 

TPC and TFC. The TPC was determined in ethanolic extracts of banana peel and pulp 

flour. The TPC was found to be about 0.40 mg/ml in banana peel and about 0.33

mg/ml in banana pulp. Thus, it is clear that the TPC was higher in the peel than in the 

pulp, while the total flavonoids content was determined in methanolic extracts of 

banana peel and pulp flour. The results showed that TFC was higher in banana peel 

(0.37 mg/ml) than in banana pulp (0.20 mg/ml). 

Key words: banana, catechol , quercetin, total flavonoids, total phenolics.

A smart home is a technologically equipped residence that proactively observes its residents and offers various services. It has emerged as a potential solution to support independent living for people with disabilities and older adults, while also relieving the burdens on family caregivers and healthcare providers. A fundamental aspect of smart homes is their capability to monitor daily living activities and ensure residents' safety by detecting changes in their routines. With the advancements in technology, modern smart homes are furnished with numerous low-power sensors, radios, and embedded processors that collaboratively process data to assess the home's state and the behaviors of its occupants. This article delves into the sensor technology employed in smart homes, with a particular focus on direct environment sensing and infrastructure-mediated sensing. It explores the strengths and limitations of different sensor technologies and discusses the challenges and opportunities from technical, and ethical perspectives.