Benturki O, Radia Labied Kermiche

كلية العلوم البيولوجية-جامعة العلوم والتكنولوجيا هواري بومدين - الجزائر · الجزائر

L'authentification biométrique est un processus de vérification d'identité à l'aide des caractéristiques d'une personne. L'objectif de notre thèse se focalise sur l'iris et la cornée. L'œil de la vision caractéristiques nous permet d'acquérir des informations comme l'iris qui est caractérisé par sa texture et la cornée par sa géométrie. Notre recherche a mis en évidence la performance de la biométrie oculaire cornée, ensuite deux concepts de systèmes biométriques: oculaire-autre modalité et nitra-oculaire, iris-paume -cornée respectivement. Pour ce faire une partie majeure de notre recherche était consacré à réaliser une base de données nitra-oculaire: iris-cornée.

حسام جواد كاظم عبود الجنابي, حسين هادي ناهي, حيدر صاحب المؤمن

كلية الهندسة-جامعة بابل · العراق

The human brain contains of billions of neurons that control the central nervous system. Many techniques have been used for recording neural signals and mapping such as EEG (electroencephalogram), MEG (Magnetoencephalography), MRI (Magnetic Resonance Imaging), fMRI(Functional magnetic resonance imaging), CT scan(computed tomography), and fiber-optic techniques...etc. The recording of neuronal activity with low spatial and millisecond temporal resolutions at arbitrary depths in the brain tissues is the most difficult challenge for all of that methods. Therefore, these challenges required novel neural recording techniques in the fields of optics, electronics, magnetics, and other technologies to increase the spatial and millisecond temporal resolutions.One of the modern technologies for sensing neuron activity with high spatial and millisecond temporal resolutions is the plasmonics technique. This technology uses surface plasmon resonance(SPR) sensing to detect neuron activity. Using plasmonics technology with neuron sensing is called Neuro plasmonics technology. This technology combines biosensing with nanotechnologies in both in-vitro and in-vivo conditions. Furthermore, it is providing advantages such aslabel-free detection, real-time analysis, Biocompatible,small sample, low detection limit, and high throughput.In this thesis, an electro-plasmonic chip has been fabricated. It consists of grading layers of polycarbonate as a dielectric coated by a thin layer of gold (35nm). The prepared chip is connected with two terminals (wires) to apply an external voltage and then induce a one-dimensional (1D) electro-plasmonic nanograting chip. The fabricated chip has been evaluated physically by use of a suitable setup and then evaluated biologically to sense a different concentration of dopamine. The second step was to culture the electro-plasmonic chip with neuron cells extracted from rats and stimulated IIby dopamine. This step was to evaluate the ability of the electro-plasmonic chip for detecting the activity of cultured neuron cells. Finally, the electro-plasmonic chip was cultured with human nucleus pulposus cells(HNPC) and then injected with streptozotocin (STZ). This step was to evaluate the ability of the proposed chip for sensing the inhibition of the cultured neuron cells. The results show a nice physical phenomenon known as a plasmonic induce transparency (PIT). This physical phenomenon is produced by surface plasmon resonance (SPR) and it is proper for sensing neuron activity. By applying an external DC voltage, the amplitude (light intensity) increased, which means generating at unable plasmon-induced transparency. The generating of tunable PIT means increasing the proposed chip sensitivity. The proposed chip shows excellent results for sensing different concentrations of dopamine (300 and 700 ppm). A very clear difference was observed in the amplitude of concentration at the wavelength range of 580nm to 600nm. In the next step, twelve samples were cultured with neuron cells (rats) and then stimulated by different concentrations of dopamine. The results show the high ability of the proposed chip for sensing the neuron cells’ activity with high concentration (700ppm) and low concentration about 0.5ppm. Also, the high sensitivity with low concentration at the time range of 2 –10 min. Lastly, the proposed chips (8 samples) were cultured with HNPC cells and injected with Streptozotocin (STZ) in three different concentrations (0.5, 1, and 2 mM). This step was to induce Alzheimer’s disease and to measure the cell’s inhibition. The results show the cell’s activity decreased (inhibition) with increasing the STZ dose. These indicate the high sensitivity of the electro-plasmonic chip for sensing the cultured neuron cells’ activity.

إبراهيم عوض, روان خليل عبد الله السرخي

كلية الأعمال والاقتصاد-جامعة القدس · فلسطين

This study examines the influence of digital technology on the financial reporting quality of insurance companies listed on the Palestine Stock Exchange. The study adopts a mixed approach that combines quantitative and qualitative approaches, as it included a sample of eight companies listed on the Palestine Stock Exchange from 2019-2023. To achieve the goals of this study, quantitative data derived from annual reports were analyzed using the Partial Least Squares (PLS) technique to assess relationships and test hypotheses. In addition, the study uses the qualitative approach to gain in-depth insights from the review of financial reports. The study reaches several results, the most important of which are the findings that reveal that digital technology significantly enhances financial reporting quality by improving accuracy, transparency, consistency, and timeliness. The study also shows a strong positive relationship between digital technology and the entrepreneurial ecosystem, highlighting the role of digital innovations in enhancing collaboration and entrepreneurial innovation within the insurance sector. However, the entrepreneurial ecosystem has a statistically insignificant direct impact on financial reporting quality. It fails to mediate the relationship between digital technology and financial reporting quality, highlighting a gap in integrating entrepreneurial activities with financial reporting quality. In light of these findings, the study recommends adopting comprehensive digital technology initiatives, enhancing stakeholder collaboration, and developing integrated frameworks to improve financial reporting quality in the insurance sector. Given the significant importance of this sector in enhancing the Palestinian GDP and supporting economic growth, including data on its economic contribution in policy discussions is essential. The study recommends exploring advanced technologies to enhance the efficiency of insurance companies, maximizing their contribution to the national economy. It highlights the importance of integrating the entrepreneurial ecosystem into national regulations and fostering partnerships between startups, technology providers, and regulators. Additionally, it calls for frameworks linking digital technology initiatives with entrepreneurial activities to improve financial reporting quality and drive innovation in the insurance sector.

أسعـد مبـارك حسيـن, الهــادي عبد الله يحي

كلية الاقتصاد والعلوم الاجتماعية-جامعة البحر الأحمر · السودان

المستخلصتناولت الدراسة دور المراجعة الداخلية في ظل النظم الالكترونية. تهدف الدراسة إلى : التعرف على الطرق والأساليب التي تتم بها مراجعة الحسابات المعدة وفقاً للأنظمة الالكترونية، إلقاء الضوء على المخاطر التي يمكن أن تواجه المراجع الداخلي في عملية المراجعة الداخلية في ظل الأنظمة الالكترونية ، دراسة تطبيق المراجعة الداخلية في ظل الأنظمة المحاسبية الالكترونية بدائرة جمارك البحر الأحمر.اتبعت الدراسة ، المنهج الوصفي التحليلي في الدراسة التطبيقية ، ودراسة الحالةمن النتائج التي توصلت إليها الدراسة :- إن إستخراج الحاسوب في مجال المراجعة يمكن المراجع من التخطيط بدقة لعملية المراجعة.- إن عملية التدريب والتأهيل للمراجع في ظل المعالجة الألية للمعلومات ضرورة جداً.-ربط كل الجهات المتعاملة بالشبكة خاصة الموردين .-ضرورة التأهيل العلمي والعملي في مجال المراجعة للعاملين بدائرة الجمارك.وخلصت الدراسة الي التوصيات التالية :- إقامة دورات وتدريب وتأهيل مستمر للمراجع علي المعالجة الألية خلال فترات زمنية معينة لتمكين المراجع من متابعة التطورات الحاصلة في مجال المراجعة الألية وبالتالي الأستفادة معها في تسهيل عملية المراجعة.- ضرورة إدخال المعالجة الآلية علي مستوي الدولة واعتبارها ضرورة ملمة من أجل رفع مستوي عملية المراجعة والتدقيق.

جمال عبد الواحد فرحان, عامر فاروق عزت, عمار أحمد حمادي المحمدي

كلية الهندسة-جامعة الأنبار · العراق

This research is devoted to investigate the behaviour of reinforced one-wayself-compacting concrete slab specimens exposed to fire flame and the properties of the self-compacting concrete after exposed to fire. The exposure of reinforced one-way self-compacting concrete slab specimens to fire flame causes changes in their behaviour and properties.The experimental work includes burning the control specimens (cubes and prisms) and the slab specimens from both sides at three temperature levels(300, 500 and 700°C) by fire flame furnace for the same time period (1 hour)then cooling them in two methods. The first was by cooling the burned specimens gradually by leaving them in air (laboratory condition) and the second method was suddenly by spraying the burned samples by water. Then the specimens were loaded till failure by hydraulic applied load machine. After that, the experimental results were discussed with results of the reference specimens (non-burned).The mechanical properties (compressive strength and modulus of rupture)of specimens were determined and discussed after exposing the specimens to fire flame at temperature levels of (300, 500 and 700°C) for (1hour) at age of(28days) then cooling and testing them.The relations of the load – mid-span point deflection, the maximum residual load – temperatures and the weights of slab specimens – temperature were determined and discussed with the effects of temperature, compressive strength and cooling method on these relations.Based on test results, the properties of concrete were affected by the exposure to fire flame and they were decreasing as the fire temperature was increasing. The compressive strength of concrete was decreasing with increasing the temperature and the values of compressive strength for the cubes cooled suddenly were less than the others cooled gradually. Also, the values of modulus of rupture for the concrete prisms were decreasing and they were less for the prisms cooled suddenly than the others cooled gradually.(III)The residual maximum load capacity of slab specimens also decreased significantly with the exposure to fire flame by an amount depending on the exposure temperature, cooling method and compressive strength of concrete.For the slab specimens of compressive strength of (f 'c= 20MPa), the percentages of residual maximum load capacity of slab specimens after exposure to temperature levels of (300, 500 and 700 °C) were about (81.5%,75% and 62.3%) for gradual cooling and they were about (77.9%, 68.3% and58.3%) for sudden cooling. For the slab specimens of (f 'c =30MPa), the percentages of residual maximum load capacity of slab specimens after exposure to temperature levels of (300, 500 and 700 °C) were about (85.7%,83.5% and 72.3%) for gradual cooling and they were about (85%, 77.3% and56.4%) for sudden cooling. For the slab specimens of (f 'c =40MPa), the percentages of residual maximum load capacity of slab specimens after exposure to temperature levels of (300, 500 and 700 °C) were about (92.3%,85.7% and 71.4%) for gradual cooling and they were about (90%, 79.1% and64.2%) for sudden cooling.With respect to the theoretical study, it includes a theoretical analysis to determine the reduction factor that relates the bending strength after exposing the slab specimens to high temperature (fire flame) and the bending strength of slab specimens that were not exposed to high temperature (reference slab specimens). Based on the results of this study, the bending strength for any reinforced one-way self-compacting concrete slab of any compressive strength and any fire temperature may be estimated at future by using equations (16)and (17) presented in Chapter Five

زيد بن عمر بن عبدالله العيص , منصور بن حمد بن صالح العيدي

كلية التربية-جامعة الملك سعود · السعودية

معاوية الفقي, هيثم احمد الهادي

كلية الدراسات العليا-جامعة النيلين · السودان

حسين دندوقي, كوثر شباح

كلية العلوم‎-جامعة الاخوة منتورى - قسنطينة 1-جامعة الاخوة منتورى - قسنطينة 1 · الجزائر

Magda Elhadi Ahmed, Fadwa Mohamed Omer El Bushra, Mohamed El-Sadig Haj Ahmed, Osman Kalafalla Saaeed

كلية الطب-جامعة الجزيرة · السودان

This Interventional study was held in February –March 2012 then repeated in June -July 2012, in the eastern region of UAE, Al Ain, where Brucellosis, causes nutritional and occupational hazard. Prevalence of the disease reached 6.9 percent of livestock tested and humans' incidence was 9.39/100000. The study aimed to raise the awareness of people towards Brucellosis, change the negative attitudes, believes, promotes the skills and practice of protection against diseases. The first main part included 317 veterinary workers in different facilities underwent questionnaire to assess their knowledge, attitude, and practice towards Brucellosis. Health education presentation and training skills of correct use of personal protective equipments and hand wash was implemented to the workers. After four months the questionnaire was repeated to evaluate the impact of health education. The second part was assessment by a structural questionnaire for 158 veterinary professional awareness and knowledge, practice and attitude (KPA). The third part was an Overview by structural questionnaire for the 47 owners' knowledge, beliefs, attitudes and practice; as a possible cause of the persistence of Brucellosis in their farms. The study results revealed that the workers had a poor knowledge, wrong attitudes, believes and skills. The health education promoted and improved the worker KAP (knowledge, attitude and practice), and increase the ability to achieve disease control and community health. The professionals need health education. Owners knew the disease but didn't believe in risk and proper practices, so, they may influence brucellosis presence in their animals, and thus put humans at risk. The study concluded that the veterinary worker, professionals and owners need recurrent health education and training. The age, work duration, occupations and nationality don't play a significant role in knowledge, attitudes and practice. The study recommended that health education targets must be workers, owners and community to change negative habits and believes and professionals to promote their skills.

عبد الله سالم الهويجي, نجوى أحمد الزحاف

كلية الصيدلة-جامعة طرابلس · ليبيا

مرض الاكتئاب هو عبارة عن اضطراب عقلى واسع الانتشار يصيب الملايين من الاشخاص حول العالم وهو احدالاسباب المهمة المؤدية للإعاقة في جميع أنحاء العالم و في أسوأ حالاته يمكن أن يؤدي إلى الانتحار,والوفاة المأساوية المرتبطةبفقدان نحو 850ألف شخص سنويا.هناك العديد من النواقل العصبية التى لها دور معروف في آليات الاكتئاب,والعقاقير المضادة له.انالمونوامين (السيروتونين والدوبامينوالنورادرينالين)من المعروف أنها لها دور واضح فى هذا الشأن ولكندور حمض غاما امينوبيمتاريك ( الجابا )لا يزال غير واضح بشكل جيد, كما انه هناك العديد من الدراسات المعملية والسريرية التى أظهرتنتائج متضاربة بشأن الدور الحاسم للجابا في الاكتئاب.لذلك تقرر دراسة إذاكان الجابالهدور مباشر في علاج الاكتئاب من خلال دراسةالتأثير المضاد للاكتئاب للأدوية المختلفة التي تنشط نظام الجابا بآليات مختلفة فى نموذج الكآبة المعترف به وهو (اختبار سباحة اليأس السلوكى) و هذه الأدوية تشمل؛ ( الدايازيبام ) وهو مضاد للقلق يعمل كمحور ايجابى للجابا عندما يتحد مع مستقبلات البنزوديازيبين, (البرازولام) الذى يعمل كمعزز لمستقبل (الجابا أ) ولديه ثأثيرمزدوج كمضاد للقلق والاكتئاب عندما يتحد مع مستقبلات البنزوديازيبين,( الزولبيدم) وهو عقار منوم يستعمل على نطاق واسعو يعمل على مستقبل(الجابا أ) ويظهر جادبية عالية الى ( مستقبل الجابا أ الفرعى (الفا1),مضاد الصرع (فيغاباترين) وهو مثبط غير رجعى وذو انتقائية عالية لئنزيم (غاما امينوبيمتاريك اسيد ترانزامينيز),وأخيرا كان من الضرورى أن نشمل فى دراستنا مضاد الاكتئاب القياسى (الأميبرامين )الذى يعمل بتثبيطإعادة امتصاص(السيروتونين ,والنورادرينالين) من قبل الخلايا العصبيةنتائج الدراسةالمتصلة بقياسةّدمالسكون الحركى فى اختبار سباحة اليأس السلوكى بعد 60دقيقة من اعطاء الدواء اظهرت أن كل الأدوية المختارة المنشطة لنظام الجابا بآليات مختلفةماعدا الجرعة العالية من (البرازولام)قدانتجت زيادة مهمة فى ةّدمالسكون الحركى (مفعول مسبب للاكتئاب). هذه النتائج تدل على أنالناقل العصبى المثبط (الجابا),ربما يكون قد سبب المفعول المشابه للاكتئاب نتجية تأثيره المسبب لنقص توفرالمونوامينفى مناطق معينة من الدماغ,وللذلك استنتاجنا أن الزيادة فىنشاط نظام الجابابالآليات المختلفة لن ينتج عنه مفعول مضاد للاكتئاب.