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Buscador de Tesis y publicaciones académicas

Consulta más de 250 millones de tesis, artículos científicos, ponencias y datasets de repositorios abiertos de todo el mundo. Encuentra antecedentes para tu investigación y descarga los que son de acceso libre.

2.735.484 resultados

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Tesis de maestría 2026

SYNTHESIZING SILICON QUANTUM DOTS (SIQDS) FROM FOOD WASTE AS GREEN EFFICIENT SCALE INHIBITORS

PIRES, ADILLA AMIRO

This work presents the development of sustainable, high-performance nanomaterials for oilfield scale management through the synthesis and functionalization of silicon quantum dots (SiQDs) derived from biomass precursors. The study addresses key limitations of conventional scale inhibitors, including environmental toxic...

Green Scale Inhibitors Silicon Quantum Dots (SiQDs) engineering and technology Biomass Waste Valorization
  • Qatar
  • English
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Tesis de maestría 2026

VULCAN: A HYBRID CNN–TRANSFORMER FUSION MODEL WITH FEDERATED LEARNING FOR VISION-BASED FIRE AND SMOKE DETECTION

ALSHAMMARI, HAYA M KH

Early fire and smoke detection is critical for protecting lives and infrastructure. While vision-based deep learning methods outperform traditional sensors, they lack principled fusion strategies and remain underexplored in privacy-preserving, distributed settings. This thesis presents two contributions. First, it prop...

Vision Transformers Federated Learning (FL) Fire and Smoke Detection Convolutional Neural Networks (CNNs)
  • Qatar
  • English
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Tesis de maestría 2026

ELECTROCHEMICAL TREATMENT OF 4-CHLOROPHENOL USING MIXED METAL OXIDE CATALYSTS

ASHOK, AROMAL

The presence of chlorinated organic pollutants in industrial wastewater poses serious environmental and health risks due to their toxicity and persistence. This thesis investigates the electrochemical degradation of 4-chlorophenol (4-CP) using mixed metal oxide catalysts. The study originated from a review on disinfect...

Electrochemical Oxidation 4-Chlorophenol Degradation environmental biotechnology Industrial Wastewater Treatment
  • Qatar
  • English
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Tesis de maestría 2026

DEVELOPMENT OF A NOVEL ULTRAFILTRATION MEMBRANE INCORPORATING DEEP EUTECTIC SOLVENT FUNCTIONALIZED MXENE NANOCOMPOSITE FOR ENHANCED OIL/WATER SEPARATION

Chowdhury, Mahmuda Khanam

With the rapid advancements in industrial processes there is a growing demand for efficient separation of complex oily wastewater. The development of two dimensional (2D) MXene nanomaterial showed significant advantages in several applications including gas separation, energy storage and water treatment. This study aim...

Ultrafiltration Membranes Deep Eutectic Solvents (DES) engineering and technology chemical engineering
  • Qatar
  • English
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Tesis de maestría 2026

DEVELOPMENT AND VALIDATION OF A QUANTITATIVE FOOD FREQUENCY QUESTIONNAIRE TO ASSESS DIETARY INTAKE IN A REPRESENTATIVE SAMPLE OF CHILDREN AND ADOLESCENTS AGED 6-14 YEARS OLD LIVING IN QATAR

KHIAL, YASMEN GHAUSUDDIN

Introduction: Accurate dietary assessment of children is essential for nutritional epidemiology and public health surveillance. However, validated pediatric dietary assessment tools are virtually absent in Qatar. This study describes the development and validation of the first culturally adapted food frequency question...

validation children Food frequency questionnaire dietary assessment
  • Qatar
  • English
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Tesis de maestría 2026

PRECONCEPTION HEALTH AND CARE IN THE EASTERN MEDITERRANEAN REGION: A SCOPING REVIEW

ANANZEH, ABDULLAH MOHAMMAD AHMAD

Background: Health risks affecting pregnancy often start before conception. Preconception care involves a package of interventions delivered to women and men before pregnancy to optimize health and reduce adverse reproductive outcomes (1). In the Eastern Mediterranean region (EMR), genetic, behavioral, and cultural det...

medical and health sciences clinical medicine Reproductive Health Scoping Review
  • Qatar
  • English
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Tesis de maestría 2026

PREPAREDNESS OF DENTAL HYGIENE STUDENTS FOR CLINICAL PRACTICE

ASRAF, SUADAH ISMAIL

Preparedness for clinical practice is a key outcome of dental hygiene education, yet limited research has explored how key stakeholders perceive preparedness. This study aimed to explore the attributes of preparedness and the factors influencing the transition of dental hygiene graduates into clinical practice. A quali...

medical and health sciences Transition to Practice Professional Competence Clinical Preparedness
  • Qatar
  • English
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Tesis de maestría 2026

IMPACT OF ANTIMICROBIAL RESISTANCE ON MORTALITY: A SYSTEMATIC REVIEW AND META-ANALYSIS

FATIMA, FIRDOUS

Background: Resistance to bacterial infections has evolved into a major global health issue, raising serious concerns like those faced in the pre-antibiotic era, yet its impact on direct and associated mortality remains incompletely synthesized. We conducted this review to synthesize global attributable and associated...

basic medicine medical and health sciences Antimicrobial Resistance Systematic Review
  • Qatar
  • English
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Tesis de maestría 2026

SAFETY AND EFFECTIVNESS OF INTRAVENOUS FOSFOMYCIN IN THE TREATMENT OF MULTIDRUG RESISTANT GRAM-NEGATIVE INFECTIONS: A RETROSPECTIVE MATCHED COHORT STUDY

ALATTAR, RAND ANWAR

Introduction: IV Fosfomycin has re-emerged as a potential treatment for multidrug resistant (MDR) infections due to its broad antibacterial coverage and distinctive pharmacokinetic. The aim of this report is to examine the safety and effectiveness of IV Fosfomycin in Multidrug resistant gram-negative infections (MDR-GN...

basic medicine Antimicrobial Therapy medical and health sciences Intravenous Fosfomycin
  • Qatar
  • English
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Tesis de maestría 2026

TOXICITY ASSESSMENT OF SILVER NANOPARTICLES IN ZEBRAFISH: THE CONTRIBUTION OF SURFACE CHEMISTRY

HUSAINI, ARSHIYA SAYED ANWAR

Background Silver nanoparticles (AgNPs) are widely utilized in biomedical and consumer applications, yet how surface chemistry governs their toxicological profile remains incompletely understood. Aims This study aimed to investigate how different surface capping agents-citrate (Cit), polyvinylpyrrolidone (PVP), and pol...

Colloidal Stability Zebrafish Toxicity Assessment engineering and technology nano-technology
  • Qatar
  • English
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Resultados provistos por OpenAIRE, la infraestructura europea de ciencia abierta. Tesis y Másters Colombia no aloja ni distribuye estos documentos: cada enlace lleva al repositorio de origen.

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3

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