Review Of Previous Models Research Articles

Dual-Activation Emergency Situation Notification System: A Feature Driven Development Approach

Emergencies can unpredictably arise, posing severe threats to individuals' lives. Swift and effective communication plays a crucial role in promptly relaying vital information to relevant response agencies and loved ones, aiming to minimize or eliminate the impact of such disasters. Existing systems often require manual triggering of distress signals through button presses or image captures. However, these methods can be ineffective, particularly when victims are under the surveillance of wrongdoers, rendering them unable to discreetly use their devices. To address this issue, this study introduces the Dual-Activation Emergency Situation Notification System (DA-ESNS) model, which ensures that potential wrongdoers remain unaware of the user's attempt to seek help by employing an efficient communication and alerting system during emergencies. Through a review of previous models, the DA-ESNS model was developed to address identified gaps. The Feature Driven Development software development process model was selected due to its agile and incremental nature, enabling focused development and integration of the notification feature. ReactJS and NodeJS were utilized for frontend and backend development, respectively. The integration of Twilio API and Geolocation API facilitated SMS notifications and precise location sharing with emergency response teams and predefined contacts. The DA-ESNS model automatically relays distress signals by persistently listening for predefined keywords or manually triggered by clicking on corresponding emergency cards, notifying both the emergency response team and the victim's family members. The model was implemented across various mobile platforms, providing a centralized and interactive interface. By offering quick notifications and offline accessibility, the DA-ESNS model streamlines the emergency alert process, significantly improving the effectiveness of emergency response teams in reducing the impact of crises through rapid reaction times. As a result, the DA-ESNS model emerges as a valuable and effective tool in emergency management.

"ON CHOOSING APPROPRIATE EQUATIONS FOR MATHENATICAL MODELING OF PROCESSES IN PCM-BASED ENERGY STORAGE SYSTEMS FOR VEHICLES"

"With regards to storing thermal energy, latent heat storage are the matter of growing attention over the past years due to their straightforward design, affordable production and maintenance costs, as well as universal applicability. The phase-change materials (PCM) are well-known for their widespread use in aforementioned systems primarily because of their high thermal storage density. Many studies concerning analysing and optimising the design of latent heat storage systems (LHHS) have been carried out in the last years. In relatively recent researches, different research teams have investigated different types of LHHS, using mathematical models of different levels of complexity. The wide variety of different approaches to the mathematical modeling (including different methods, algorithms and applications from different field of pure and applied research) sometimes make it challenging to choose and implement a proper system of equations and criteria without excessive complicacies. This very paper describes and elaborates on the system of equations that can and will be applied to the mathematical modeling of charging/recharging process in PCM-based LHHS for commercial vehicles. After a brief review of previous models, author presents the model and asses its accuracy and possibilities for further development and exploration. "

An Integrative Model (iModel) for Decision-Making in Tourism

ABSTRACTThis article contributes to the conceptual and methodological strengthening of the study of tourism as a complex phenomenon using systems thinking. It is aimed at supporting decision-making for tourist destinations’ planning and management. Few authors provide a schematic model of how tourism works, and among them, even fewer expressly use a systemic approach. However, nobody presents a methodology for their models’ analytical application to bridge theory and practice. The integrative model (iModel) fills this gap. It is developed through a review of previous models, research in Belgian, German and Ecuadorian cases, discussion in experts’ panels and supported by a long experience in destination development in Ecuador. Main contributions are 1) the introduction of a model of tourism as a dynamic complex system based on the functions performed by the actors involved in the tourism experience; and 2) the presentation of a methodology to apply the model-as-a-tool for decision-making support in tourism practice.

Tidal Wave Propagation in the Yellow Sea

To investigate the near-field and far-field hydrodynamic conditions along the Jiangsu Coast in large scale, a two-dimensional tided wave model which covers the Bohai Sea, the Yellow Sea and the East China Sea is developed and validated. After a brief review of previous models, some influencing factors, such as tide generating force, river discharges as well as shoreline changes due to land reclamation, are examined in this study. We suggest that whether these factors should be considered in the model depends on the different purposes and geographical regions of interest. Then, a series of experiments are designed to further investigate the previously proposed important factors of influence [i.e. local bathymetry and the role of Shandong Peninsula (SDP)] on the tided motions in the Yellow Sea. The numerical experimental results show that the interaction between the tidal wave system in the northern Yellow Sea and the incoming tidal wave plays a main role on the formation of the rotating tidal wave system in the southern Yellow Sea, whereas the role of geometric position of the SDP is secondary. With respect to the tidal current, it is found that the radial shape of it is independent of the local bathymetry, but may be generated by the convergent tidal wave formed by the meeting of the rotating tidal wave in the southern Yellow Sea and the incoming tidal wave from the East China Sea. Furthermore, a certain water depth is crucial for the intensity of current velocity to generate the special topography of radial sand ridges.

Computer Modelling of Dental Plaque in Relation to Dental Caries

The complex interplay of diffusion and reaction during a cariogenic challenge to the tooth, after sugar ingestion, is considered in terms of mathematical modelling of the dental plaque using finite-difference computer techniques. A discussion of some of the factors which might be included in a model is followed by a brief review of previous models and a description of the author's recent proposals designed to model cariogenesis more accurately. Some results obtained with this model are described, together with the strategy used for defining its parameters.

Computer Modelling of Dental Plaque in Relation to Dental Caries

The complex interplay of diffusion and reaction during a cariogenic challenge to the tooth, after sugar ingestion, is considered in terms of mathematical modelling of the dental plaque using finite-difference computer techniques. A discussion of some of the factors which might be included in a model is followed by a brief review of previous models and a description of the author's recent proposals designed to model cariogenesis more accurately. Some results obtained with this model are described, together with the strategy used for defining its parameters.

Hydrodynamics of gas stirred melts: Part II. Axisymmetric flows

A predictive model of gas stirred melt is presented. Based on the differential approach and following a review of previous models, the importance of natural convection or buoyancy driven phenomena is underscored. Predicted flow patterns are shown to be consistent with laboratory and pilot scale experiments, and with the macroscopic plume model in Part I of this paper.

An asperity interaction machining theory of friction

The understanding of friction for the simple case of two surfaces contacting under the influence of a normal force is a complicated problem for which there is currently no definitive answer. In this paper a brief review of previous models is given and the similarity of the static and dynamic conditions of asperity interaction to those of the machining process is shown. A new model of the friction process based upon a three-zone model of machining is proposed and the effects of material, normal load and velocity calculated based upon machining information obtained at low feeds. The new theory of friction is able to predict approximate values of μ and to account for its change as a function of material and sliding velocity. It can also explain the change in μ that occurs when normal force conditions increase to cause interfacial seizure.