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Research Article
IAR-99 HAWK Flutter Model Studies with External Stores
Issue:
Volume 9, Issue 1, June 2025
Pages:
1-13
Received:
17 December 2024
Accepted:
5 January 2025
Published:
22 January 2025
Abstract: The new Finite Elements Model (FEM) allows the visualization of the results and the study of the behavior of the structure at the local level (frames; lises; spars; frame-body, shell-body and longeron-body interaction) in the case of global dynamical phenomena. After creating FEM of the aircraft IAR-99 HAWK in the empty equipped configuration using special elements, the team decided to extend the study of flutter to aircraft in different external stores configurations. The results of the theoretical free-free vibrations obtained for the IAR-99 HAWK in different external stores configurations are presented and compared to those obtained from ground tests, thus confirming the accuracy of the new Finite Element Model (FEM). The aerodynamic idealization of the IAR-99 HAWK in external stores configurations aircraft was made using the Doublet Lattice Method (DLM) for subsonic flow, also considering the load-bearing wing/fuselage/pylon/store interference and aims to determine the generalized aerodynamic forces. The flutter calculation for the IAR-99 HAWK in external stores configurations aircraft, was made using the p-K methodology presented in the MSC. Nastran program, using the vibration modes obtained on the basis of the new finite element model and the matrix of generalized aerodynamic forces in subsonic flow. The V-g curves drawn lead us to flutter speeds outside the safety margin related to the maneuvering diagram, according to the regulations in force, both in the case of the plane in smooth configuration and the plane in the selected external storers variants.
Abstract: The new Finite Elements Model (FEM) allows the visualization of the results and the study of the behavior of the structure at the local level (frames; lises; spars; frame-body, shell-body and longeron-body interaction) in the case of global dynamical phenomena. After creating FEM of the aircraft IAR-99 HAWK in the empty equipped configuration using...
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Research Article
The Sustainability of Water Access Services in Mozambique: From Policy to Practice
Alves Nhaurire*
,
Rehana Capurchande
Issue:
Volume 9, Issue 1, June 2025
Pages:
14-26
Received:
18 February 2025
Accepted:
6 March 2025
Published:
21 March 2025
Abstract: The access to water services is deficient in Mozambique, with only a little more than half of the population having access to this service. Investments have been made on the one hand in terms of construction and rehabilitation of new water sources and supply systems, and on the other hand in terms of elaboration of a legal and institutional framework that "favors" greater dynamism in the sector. In this paper, we seek to analyze the framework of policies and strategies institutionally designed to ensure sustainable access to water services in Mozambique. That is, to analyze the process of implementation of water policies in Mozambique, seeking to understand the relationship between theory and practice. This paper is part of a qualitative study based on phenomenological principles. Field work was carried out in Gaza province, Mozambique, alongside document analysis of the main policies and strategies of the water sector in Mozambique, and interviews with key informants in the sector. The study revealed that in theory, the availability of a legal framework and the existence of institutions at various levels may indicate that the foundations for sustainable access to water services are in place. However, the challenge lies in its operationalization. District governments have a weak grasp of the legal framework, and insufficient technical and financial capacities for its operationalization.
Abstract: The access to water services is deficient in Mozambique, with only a little more than half of the population having access to this service. Investments have been made on the one hand in terms of construction and rehabilitation of new water sources and supply systems, and on the other hand in terms of elaboration of a legal and institutional framewo...
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Review Article
The Transformative Impact of Container Technology in Public Sector Organizations
Félix Témolé*,
Desislava Atanasova
Issue:
Volume 9, Issue 1, June 2025
Pages:
27-35
Received:
12 March 2025
Accepted:
24 March 2025
Published:
17 April 2025
DOI:
10.11648/j.stpp.20250901.13
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Views:
Abstract: The introduction of container technologies in the public sector has significantly driven the digital transformation. IT departments have recognized the importance of this new innovative and highly efficient technology and identified these insights as key to improving existing processes and systems. This has increased the IT landscape's ability to innovate and overcome the challenges of IT infrastructure efficiency, scalability, security and rapid application deployment. This article examines in detail the adoption and impact of container technology in public organizations. The numerous benefits such as increased efficiency, scalability and flexibility as well as the existing challenges in terms of integration, security and regulation are highlighted. In addition, future potential of this technology is also shown. A comprehensive analysis of existing research shows that the use of container technology for digital transformation in public organizations leads to greater organizational flexibility, delivery efficiency, resource utilization transparency, and IT infrastructure security. This article provides an analysis of the existing challenges and successes of public organizations. It also assesses the potential and highlights possible obstacles for the public sector and emerging trends. The results of this study demonstrate that container technologies have significant potential in terms of innovation, flexibility, efficiency and security for public organizations. These findings form a solid basis for further research activities in this area.
Abstract: The introduction of container technologies in the public sector has significantly driven the digital transformation. IT departments have recognized the importance of this new innovative and highly efficient technology and identified these insights as key to improving existing processes and systems. This has increased the IT landscape's ability to i...
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Research Article
In Silico Design of Novel Bioactive Molecules to Treat Breast Cancer with Uvaria Chamae Derivatives: A Computational Approach
Omobolaji Odunowo*
Issue:
Volume 9, Issue 1, June 2025
Pages:
36-46
Received:
13 March 2025
Accepted:
25 March 2025
Published:
17 April 2025
DOI:
10.11648/j.stpp.20250901.14
Downloads:
Views:
Abstract: Breast cancer, which causes abnormal growth in breast tissue and can spread to other parts of the body, is difficult to treat due to the detrimental effects of traditional treatments such as radiation, chemotherapy, and surgery. Uvaria chamae a plant from the Annonaceae family, has antioxidant and antiproliferative characteristics, making it an alternative herbal treatment for cancer. The study aims to assess the bioactivity of Uvaria chamae leaf chemicals against the human placental aromatase in the breast cancer signaling pathway using a protein-ligand networking approach and molecular docking analysis. Bioactive Uvaria chamae compounds were downloaded from PubChem, examined for similarity using SWISS ADME, anticancer potential using PASSOnline, docked using PyRX, visualized with Biovia Discovery Studio, and tested for ADMET using pkCSM. Uvaria chamae leaves contain bioactive substances such as Apigenin, Diphenylcarbazide, Enamine, Naringin, Obovatin, Rutin trihydrate and Quercetin which have been shown to inhibit human placental aromatase proteins linked to breast cancer. Rutin trihydrate is a bioactive molecule that has a higher binding affinity than Exemestane which is used as reference drugs. The In silico analysis, drug likeness analysis, absorption, distribution, metabolism, excretion, and toxicity (ADMET) evaluation suggest that Rutin trihydrate, Quercetin and Apigenin derivatives from Uvaria chamae is a promising human placental aromatase inhibitor for breast cancer, with a binding affinity of -9.2, -8.0, and -8.0 kcal/mol compared to Exemestane (-7.5 kcal/mol). Considering the results of molecular docking, drug likeness analysis, absorption, distribution, metabolism, excretion, and toxicity (ADMET) evaluation, it can be concluded that Rutin trihydrate Quercetin and Apigenin derivatives hold promise as potent inhibitors for the treatment of breast cancer.
Abstract: Breast cancer, which causes abnormal growth in breast tissue and can spread to other parts of the body, is difficult to treat due to the detrimental effects of traditional treatments such as radiation, chemotherapy, and surgery. Uvaria chamae a plant from the Annonaceae family, has antioxidant and antiproliferative characteristics, making it an alt...
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