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Enhancing Compressed Earth Blocks with Eggshell and Lime: Effects on Mechanical and Physical Properties
Get PDFThis study examined the engineering, microstructural, and elemental properties of compressed earth blocks (CEBs) stabilised with eggshells and lime. Experiments were conducted on 140 � 100 x 100 mm earth blocks stabilised with 10% constant lime and 0, 0.25, 0.5, 0.75, 1% eggshell contents. CEBs were tested for density, water absorption, tensile strength, compressive strength, erosion, chemical composition, and microstructural on 7, 14, 21, and 28 curing days. At 28 days of curing, the 1% eggshell and 10% lime-stabilised compressed earth blocks recorded compressive and tensile strengths of 1.33 and 0.173 N/mm2, respectively compared with the unstabilised compressed earth blocks� strength of 1.01 and 0.14 N/mm2. The eggshell and lime-stabilised compressed earth blocks also exhibited reduced water absorption of 3.32% compared to unstabilised blocks of 4.62%. SEM and EDS analyses further confirmed the microstructural properties and contribution of key elements like calcium to enhanced mechanical properties. The study concludes that the presence of eggshells and lime in the earth matrix enhanced the properties of the compressed earth blocks.� It is recommended that block manufacturers enhance the properties of the compressed earth blocks should with 1% eggshell and 10% lime
Study on the Landslide Caused by Difference Creep Behavior of Loess Under Highway Excavation
Get PDFLarge-scale road construction in mountainous areas inevitably leads to numerous excavation slopes, particularly in the Loess Plateau, characterized by abundant ancient landslides and complex stratigraphy. Excavation-induced stress relief can easily reactivate these ancient landslides, posing significant threats to engineering safety. This study takes an ancient landslide in the Loess Plateau as a case example. Field investigations clarified the lithological characteristics of the strata. Indoor triaxial unloading tests were conducted to examine the unloading creep behavior of silty soil and clay located near the sliding zone. Finally, numerical simulations were employed to analyze the evolution process of landslide reactivation induced by excavation. The study revealed the following findings: (1) The primary factor inducing the landslide is the differential unloading creep behavior of silty soil and clay. Silty soil readily reaches an accelerated creep state under unloading conditions, whereas clay remains relatively stable with smaller deformation. The creep behavior of the soil can be well described using the Nishihara model. (2) Comparison of two unloading stress paths showed that vertical stress unloading causes minor rebound deformation with minimal impact on overall deformation. In contrast, lateral stress unloading results in significant soil deformation, which is the main cause of the landslide. (3) During the landslide, there was an abrupt change in pore water pressure within the soil, which can be combined with deep soil deformation as a key indicator for monitoring and early warning of this type of landslide
Web Consumer Experience (WCX) and Digital Consumer Experience (DCX): Conceptualization & Operationalization of Measurement
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Recalcitrant Humeral Nonunion: Biological Reconstruction Technique
Get PDFNonunion of the humeral shaft occurs in between 2% and 10% of non- surgically treated fractures and up to 15% of fractures treated with initial open reduction and internal fixation. The definition of recalcitrant nonunion is still under debate. The purpose of this study is to present the outcomes of a series of patients with recalcitrant pseudarthrosis of the humerus who were treated with stable osteosynthesis combined with biological reconstruction using allograft utilizing a novel surgical approach
Motivation and Awareness Campaign: Institutional Evaluation of Facultade S㯠Francisco De Assis
Get PDFThe quality of higher education is a topic of great relevance, as it is directly linked to the formation of qualified professionals for the exercise of their roles. To assess the quality of higher education, the Ministry of Education established parameters and implemented various evaluation instruments. The publication of Law 10.861/2004 systematized these assessments, highlighting the need for an in-depth study of the system and the active participation of the academic community in this process. The specific objective was to apply new evaluation instruments following a motivation and awareness campaign, assessing the new participation rates. The research was qualitative and quantitative, using a case study with document analysis. In the data discussion analysis, a comparative method was used to address the specific objective. The legislation from INEP and MEC provided the theoretical foundation for this investigation. In the final considerations, it was found that continuous mobilization and awareness efforts, through effective campaigns, enhance the understanding of the topic and contribute to improving the teaching and learning process, as well as promoting improvements in institutional infrastructure
New Markers of Coronary Heart Disease with Old Myocardial Infarction: Certain Variants of Relative Length of Telomeric Repeats
Get PDFOne of the possible factors in the occurrence of coronary heart disease with myocardial infarction is oxidative stress.� Oxidative stress intensifies the formation of free radicals, causing defects in proteins and nucleic acids. This can lead� to their partial or complete destruction. For example, the result of such destruction of DNA molecules may be a� decrease in the length of telomeric repeats in the chromosomes of cells in coronary heart disease.�
Therefore, the aim of this work was to analyze the association of certain variants of the relative length of telomeric� repeats with coronary heart disease with old myocardial infarction (CHD with MI).�
To measure the length of telomeric repeats, whole blood was collected, with the following DNA isolation from nuclear� cells. The relative length of telomeric repeats was calculated based on the formula �2 to the power (-?Ct)�, where ?Ct� = Ct of telomeres-Ct of albumin. In this case, Ct of telomeres is the threshold cycle of the telomeric repeat, and Ct of� albumin is the threshold cycle of the albumin gene. The results of the relative length of telomeric repeats are presented� as a percentage of the calibrator. DNA isolated from HeLa cell line was used as a calibrator.�
By measuring variants of the relative length of telomeric repeats in the studied samples, an association of coronary� heart disease with myocardial infarction with VRLTR-46, VRLTR-49, VRLTR-51, VRLTR-53 and VRLTR-56 was� detected. At the same time, 6 of 21 variants of the relative length of telomeric repeats (VRLTR-63, VRLTR-65,� VRLTR-68, VRLTR-70, VRLTR-71 and VRLTR-73) had a protective effect in coronary heart disease with myocardial� infarction.�
Therefore, in the present research work, we propose new markers of coronary heart disease with old myocardial� infarction: certain variants of relative length of telomeric repeats (VRLTR).
FEA Modelling of the Aluminium Alloy Graphene-based Composite Plate for the Launch Vehicle External Fuel Tank Structural Application
Get PDFThe primary aim of this research is to investigate the structural uses of an aluminium alloy with a composite plate made of graphene in launch vehicle fuel tanks. To evaluate the viability and performance of the composite plate in this application, finite element analysis (FEA) modelling is used. The study aims to analyse the composite plate\u27s mechanical behaviour, thermal characteristics, and structural integrity under various loading scenarios, such as mechanical and thermal loads, stress, and strain. The outcomes of the FEA model are compared with the materials currently used in the external fuel tanks of launch vehicles. A cost analysis of the production process is also carried out to determine whether using the graphene-based composite plate is economically feasible. The study intends to provide light on the benefits, difficulties, and constraints related to the structural components of launch vehicle fuel tanks made of graphene-based composites. The results of this study have the potential to advance the discipline of aeronautical engineering and establish the framework for upcoming advances in materials science and design optimisation for launch vehicle applications
Structural Equation Model Approach to Understand Intentions to use Online Hospital Services (OHS) in Context of Rural China
Get PDFThis study aims to explore the factors influencing the adoption of Online Hospital Services (OHS) among rural residents in China, utilizing the Technology Acceptance Model (TAM) framework. A Structural Equation Model (SEM) was employed to analyze data collected from 422 participants with Internet hospital experience, selected through random sampling. Data collection involved online questionnaires distributed over 45 days, resulting in effective samples. The survey was divided into six sections, focusing on various aspects of user perceptions and intentions regarding OHS. The results indicate that perceived usefulness (PU) and perceived ease of use (PEOU) positively affect attitudes towards OHS, with trust acting as a crucial mediator between these variables and usage intentions. The studys theoretical contributions include extending TAM by highlighting the central role of trust in digital health adoption, particularly in rural contexts. Practically, the findings suggest that policymakers and technology developers should focus on enhancing trust and user-friendliness to promote OHS adoption, thereby bridging the urban-rural healthcare divide and improving healthcare accessibility
Neuro-Driven Cybersecurity: Strengthening Digital Defense
Get PDFThe swift progress in the fields of neuroscience and cybersecurity has presented a transformative opportunity for multidisciplinary collaboration. The use of neuroscience-informed approaches can offer fresh perspectives and tactics for bolstering cybersecurity safeguards as the digital ecosystem grows more intricate and linked. This editorial examines the connections between these two disciplines, emphasizing how neuroscience can advance our knowledge of vulnerabilities that are human-centric, enhance threat detection and response, and encourage the creation of cybersecurity frameworks that are more flexible and resilient. The editorial highlights the vital significance of promoting interdisciplinary research and collaboration to protect the digital domain against developing cyber threats by looking at the intersection of neuroscience and cybersecurity