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Influence of Tilt Angle on PV Output for Solar Energy Optimization in Iraq
Get PDFIt has been established through investigation that the optimal inclination of photovoltaic (PV) modules is a critical factor for harnessing the maximal quantity of solar radiation impinging upon solar arrays. The specificity of the requisite angle for each site is underscored, contingent upon the solar trajectory over daily, monthly, and annual cycles. The determination of this optimal angle is imperative for maximizing the yield from solar PV systems within the confines of Iraq. Worldwide locales have seen the application of varied methodologies for ascertaining the correct tilt angle. The efficacy of PV systems is observed to be significantly influenced by whether a fixed or a tracking system is employed to modulate the tilt angle. The present manuscript delineates the contemporary state of research and praxis pertaining to the influence of tilt angle on PV output, employing an array of optimization techniques. Furthermore, the work offers a disquisition on the determination of the most advantageous tilt angle to optimize energy acquisition in Iraq. The inquiry reveals that an optimal tilt angle for Iraq is discerned to be 38,3. This compendium is intended to augment the compendium of knowledge available to designers and scholars endeavoring to pinpoint the most favorable tilt angle for solar PV systems in any given Iraqi local
Estimation of The Maximum Bending Moment on Pile Group Under One-Way Cyclic Loading in Sandy Soil
Get PDFIn fact, most civil engineering projects are subjected to cyclic loads. The sources of this load are usually seismic, wind, sea waves, and others. Model tests in sandy soil were performed to determine the maximum bending moment at which a pile group (2x2) would respond under one-way lateral cyclic loading. The group pile was made of aluminum piles that were installed in sandy soil with a 70 % relative density and three-pile spacing of (3D, 5D, and 7D). The cyclic loads ratio (CLR) used are (0,6, 0,0,8, and 1,0) that is a result from average lateral static load. It can be concluded that an increase in group pile spacing can reduce the maximum bending moment by up to 92 %. In addition, As the distance increases, the bending moment decreases, the front pile group provides a greater maximum bending moment than the back rows, as the maximum value in comparison reached 53
Sizing Of Photovoltaic Standalone System In Mandali City / Iraq: A Case Study
Get PDFThis paper includes a study on the load requirements of houses located in Mandali city, Iraq, as well as design and installation of a stand-alone photovoltaic (PV) system. The utilization of PVsyst simulation software has facilitated the examination of performance ratio with losses. The mean annual energy demand within the residential dwelling is recorded as 4 614,5 kilowatt-hours per year, while the solar panel system is capable of generating 5 731,6 kilowatt-hours per year. However, the energy delivered to the user falls slightly short of the required load, amounting to 4 614,5 kilowatt-hours per year. The diminished power capacity for the system can be attributed to many types of losses. The examination of performance ratios indicates that the month of November exhibited the highest performance ratio (PR) at 87,57 %, while the lowest PR of 50,61 % was seen in April. On average, the PR for the entire year was calculated to be 63 %. The diminished power capacity for the system can be attributed to many types of loss
Increasing the Steam Boiler Maintainability Adopted Design Factors
Get PDFCompanies are increasingly compelled to evaluate all dimensions of product performance in order to maintain competitiveness in the face of global market challenges. Maintainability is a crucial aspect of product performance. Maintainability refers to a product\u27s economical and efficient ability to undergo maintenance. Maintenance is necessary for the proper functioning and longevity of several durable items. Adopting maintainability design factors during the first stages of the design process can reduce maintenance expenses, minimize maintenance time, and enhance safety measures. In this paper, the steam boiler is studied and how to improve its maintainability through design factors to make it more maintainable. In order to reduce the time required to perform maintenance and thus reduce the system\u27s downtime and make it available for a longer time, thus increasing production. The case study adopted in this paper is the steam boiler of the thermal power plant in south Baghdad. A study of the steam boiler was conducted, and maintainability was calculated according to the data obtained from the station. A part of the boiler was chosen to improve its maintainability, which is the air heater, as it is the most essential part due to its frequent malfunctions. A study was conducted on the air heater and its parts. The overhead crane was developed by suggestion into an improved design as a tool for accessibility, considered an important design factor for ease of access and handling and, at the same time, for the safety of maintenance workers. This improvement reduced from 24 to 48 hours of repair time for each fault, and the results after calculating the maintainability of the steam boiler after the improvement showed that it increased from 48,5 % to 53,5 %, i.e., an increase of 5
Bioactive Peptides Derived from Food Sources: Bibliographic Review
Get PDFIntroduction: recently, bioactive peptides derived from food have been incorporated as key components in functional foods and nutraceuticals to combat and manage various diseases thanks to their biological effects.
Methods: this document explores the biological and functional properties of bioactive peptides, ranging from antihypertensive effects to improvements in the physical characteristics of foods. Special attention has been given to peptides derived from Andean foods like quinoa, amaranth, and maca.
Results: bioactive peptides demonstrate antimicrobial, antioxidant, antithrombotic functions, and angiotensin I-converting enzyme (ACE) inhibition, promoting health by preventing chronic diseases and improving body functions. Additionally, these peptides have shown to enhance the properties of various foods, including dairy products and fermented beverages.
Conclusion: the research highlights the potential of bioactive peptides to formulate new healthy food products. Including peptides from Andean sources could expand options in functional foods, leveraging their unique nutritional properties to benefit cardiovascular and metabolic healt
Entropy pelican optimization algorithm (epoa) based feature selection and deep autoencoder (dae) of heart failure status prediction
Get PDFIntroduction: heart Failure (HF) is a complicated condition as well as a significant public health issue. Data processing is now required for machine and statistical learning techniques while it helps to identify key features and eliminates unimportant, redundant, or noisy characteristics, hence minimizing the feature space\u27s dimensions. A common cause of mortality in cases of heart disease is Dilated Cardiomyopathy (DCM).
Methods: the feature selection in this work depends on the Entropy Pelican Optimization Algorithm (EPOA). It is a recreation of pelicans\u27 typical hunting behaviour. This is comparable to certain characteristics that lead to better approaches for solving high-dimensional datasets. Then Deep Autoencoder (DAE) classifier has been introduced for the prediction of patients. DAE classifier is employed to compute the system\u27s nonlinear function through data from the normal and failure state.
Results: DAE was discovered to not only considerably increase accuracy but also to be beneficial when there is a limited amount of labelled data.Performance metrics like recall, precision, accuracy, f-measure, and error rate has been used for results analysis.
Conclusion: publicly available benchmark dataset has been collected from Gene Expression Omnibus (GEO) repository to evaluate and contrast the suitability of the suggested classifier with other existing method
The role and place of Ukraine in modern international information policy: modern challenges and strategic imperatives of cooperation
Get PDFIntroduction: the relevance of the study is determined by evident and paradigmatic change of global political landscape and corresponding international and nation-state information policy. At the same time, attention is drawn to the presence of theoretical gaps in defining the definition of “information policy”, its institutional structure, as well as the mechanisms for its formation and implementation in today realities, in particular against the backdrop of Russia-Ukraine war and challenges concerning the role and place of Ukraine in international information landscape of international relations. Objectives: the article aims to develop an array systematizing the processes taking place within Ukrainian media space during the war, which would allow comprehending them based on theoretical paradigms and today realities of information policy, information landscape, and information geopolitics.Method: the methodological basis for considering research problems is based on the methods of systemic, structural-functional and institutional analysis. The research combines the methodological achievements of several paradigms, constituting the basis of philosophical pluralism - the synergistic method and the paradigm of nonlinearity.Results: the political role of the information space in modern society and public policy is comprehended. This role lies in the ability of the information space to reflect and subsequently change social processes (including political processes), as well as the interests of the actors dominating the political process. The negative effects of populism in the information policy of Ukraine and the discrepancies between internal and external media narratives are noted. The increasing role of civil journalism and Telegram channels in the information field of Ukraine is shown and an understanding of the corresponding challenges for information policy is propose
Musculoskeletal disorders and ergonomics in stomatologists in the municipality of Cotorro
Get PDFIntroduction: dentists, due to their work, are prone to suffer problems in the locomotor system, a situation that can sometimes limit their work performance. These problems can cause anything from mild musculoskeletal symptoms to incapacity, putting not only their health at risk but also severely reducing their professional performance. Methods: a cross-sectional descriptive observational epidemiological study was carried out with a sample of 35 stomatologists of both sexes. The stomatologists\u27 data were recorded in self-recognition surveys and data collection forms, in order to group the individual, biomechanical and ergonomic risk factors present in the sample. Results: the female sex predominated with 71,4 %, as well as the age group 35 to 44 years (42,8 %). Musculoskeletal disorders prevailed in the female sex with 62,8 %, the most affected specialty, the EGI with 42,9 %, stomatologists with 11 to 20 years of work (37,1 %). Predominant was the preference for seated work (74,3 %) and the use of inadequate postures (65,7 %). The cervical and sacrolumbar areas were the most affected 85,7 % and 57,1 % respectively. Conclusions: a close relationship was found between inadequate postures and non-ergonomic dental units with the occurrence of musculoskeletal disorders in the stomatologists in the sampl
Disentangling the Knots of Diasporic Identity through the Prism of Postpositivist Realism in Caryl Phillips’ Crossing the River
Get PDFCrossing the River (1993) holds within itself a whole history of the Black Diaspora. This history churned through the memories of various characters unfolds before the reader the experience of exile, disillusionment, and loneliness and depicts the diasporic ambivalence and hegemony of the Whites. Through a story of three black people during different time periods and on different continents as they struggle with separation from their native Africa, the novelist invites readers to see how individual stories are intertwined in the wider tapestry of collective memory. Phillips is interested in how narratives of slavery inform the contemporary migrant condition. Phillips explores the myriad associations and connecting points within black history on the imaginative terra firma of his fiction. He calls upon the reader to delve deeper into the ‘visible and obvious’ and to see how the present identities acquired their shape and characteristics; how the cauldron of collective memories, narratives, and stories produced enduring tales of affirmation and resilience. The novel acquires new contours when seen in the light of the Postpositivist realist approach. The theoretical approach enriches the thematic understanding of the novel and substantiates the idea that the concept of identity necessitates a valid epistemological inquir
Mexican social vulnerability as a sociological fact
Get PDFThe article aimed to construct a sociological interpretation about the relevance of the concept of social vulnerability, where social inequality, as a narrative, generally leads to highlighting the relevance of State institutions in the realization of citizen rights. But as a binary narrative, it forces us to include in the interpretation social behaviors organized by various beliefs derived from values, whose resonance is expressed in the mass media. In response to these arguments, it was decided to study the Mexican binary narrative in general to interpret some social behaviors recorded in the pres