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Experimental Investigation of Thermal Performancefor Novel Integrated Collector Storage
Get PDFTo lower the expenses of manufacturing traditional solar collectors and perfect use of water tanks in developing countries, a new design of integrated water heaters has been presented in a rhombus shape. This new design consists of a cube whose upper surface was cut into two directions at a 45o angle. This system's initial expenses can be kept to a minimum by using inexpensive commercial materials and little manufacturing skills. In cases of thermal instability, the MUE curve is typically employed to calculate the maximum efficiency that the system can attain. The MUE curve, which saves time and computer approaches in calculations of this kind, is the basis for this study. This experiment was studied during November and March to compare the system behavior under different climate conditions. The study included three cases per month. The first case was without any load, which reached a maximum useful efficiency of 59% for both November and March. In the case of continual loading, the system shows a maximum useful efficiency of 59% in March. When dealing with intermittent load, the maximum useful efficiency of 58% in March
A Research Study of Blood Picture of Both Cows and Buffaloes
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The current study was designed to evaluate the effect of sexual maturity in both male cows and buffaloes on hematological parameters. Blood samples were collected from 20 immature malecows and 20 mature males. In the same way, samples were collected from male buffaloes. The results of the statistical analysis showed a significant increase in the values of the packed cells volume (PCV) and the number of red blood cells of thesexually mature male cows compared with the immature, and a rise in the PCV, the concentration of hemoglobin and the number of red blood cells for the mature male buffaloes compared with the immature, while no effect of sexual maturity was observed on the number of white blood cells for both male cows and buffaloes. In conclusion, the age of sexual maturity in male cows and buffaloes had an effect that would raise the values of red bloodcells count, PCV, and hemoglobin concentration
Index Modulation OFDM Systems with Direct Pattern of Subcarrier Activation
Get PDFOFDM-IM is a spatial modulation technique applied to OFDM's block subcarriers, resulting in a modified version of OFDM. Compared to traditional OFDM, OFDM-IM boasts several benefits, such as enhanced bit-error rate (BER) performance and power efficiency. When working with OFDM-IM, the specification of subcarrier-activation-patterns (SAPs) is done by utilizing either look-up tables (LUTs) or a combinatorial approach to conform with data. However, the data-to-SAP mapping methods of both suffer from increased complexity as the number of subcarriers expands. The paper proposes a direct data-to-SAP mapping that eliminates the need for any type of look-up tables. Through the presented analysis and computer simulation results, it is demonstrated that the OFDM-IM system utilizing the proposed mapping scheme outperforms equivalent traditional OFDM-IM systems in both complexity and bit error rate (BER) performance
A Survey of Streaming Protocols for Video Transmission
Get PDFHuman life has always relied heavily on communication. Communication through the Internet has advanced significantly in recent years, and activities such as live video streaming are now commonplace. Streaming protocols, which are always growing and maturing, are utilized to guarantee video streaming is quick and smooth. Many streaming protocols are already available, and many people find it difficult to choose one that best meets their needs. This paper presents a review of studies of several available streaming protocols, as well as their main characteristics along with their performance, based on several criteria to demonstrate the validity of choosing one of them
Automatic PV Array Reconfiguration under Partial Shading Conditions
Get PDFPhotovoltaic (PV) arrays have been recognized as one of the main clean renewable sources of electrical energy. In practice, PV arrays are subject to unavoidable non-uniform partial shading (PS) due to clouds, buildings, dust, etc. PS causes the hot spot problem, mismatch losses, and output power degradation. A widely used approach to mitigate the effect of PS is dynamic reconfiguration, where, the interconnection of PV panels is modified according to the shading condition to achieve maximum output. Dynamic reconfiguration techniques use sensors, a programmable controller, and a switch matrix for optimal operation. However, they have drawbacks such as system complexity and scalability issues. For instance, reducing the number of switches limits the flexibility of the reconfiguration algorithm. In this paper, an automatic dynamic reconfiguration scheme is proposed in which PV panel irradiation activity controls the interconnection of switches, without the need for a programmable controller. A modular building block is proposed from which easily scalable PV arrays can be constructed in a hierarchical manner. Experimental and analytic results have verified the effectiveness of the proposed reconfiguration scheme
Improving the performance of the direct and indirect evaporative cooling system: A review
Get PDFThe energy-efficient and ecologically friendly cooling method known as evaporative cooling is very common. When water evaporates, cooling the air, a significant quantity of heat is transported from the air to the water, lowering the air's temperature. This process is known as evaporative cooling. In order to reduce energy consumption and provide adequate cooling comfort, this paper analyzes the most significant evaporative cooling advancements and technologies
Floating Photovoltaic Performance Evaluation Using Novel Cooling System Case Study
Get PDFPhotovoltaic panels nowadays are considered one of the most important methods for generating electricity directly from the sun as a green energy resource. The photovoltaic cells convert about 20% of solar energy to electric power, and the rest is converted to heat that increases the cells temperature. The photovoltaic performance decreases by about 0.4%–0.5% for each 1°C increase in cell temperature. This article studies the effect of using a novel cooling design to cool floating photovoltaic panels with natural cold water from natural sources. ANSYS has been used to conduct a series of simulations under different boundary conditions like solar radiation, ambient temperature, and cooling water temperature at Duhok Dam Reservoir, KRI. The results of the proposed cooling module showed a significant increase in efficiency (1.26%–2.49%) and power performance (17.76–36.81W) and a significant increase in power (6.43%–14.89%) compared to the non-cooled module. Thus, using an active cooling method for floating panels could be a typical option to boost the output of the solar panels. The results of this research have outperformed other research, with a power increase rate of about 14.1%
Business Intelligence and its Role in Achieving Sustainable performance:
Get PDF The research aims to determine the role of the dimensions of business intelligence represented by (data sources, data integration, data warehouse, data analysis, information presentation) in achieving sustainable performance represented by (economic performance, social performance, environmental performance), and the statistical program (SPSS) was adopted. . For the purpose of analyzing the data related to the field in question and showing the correlation and influence relationships between the variables, through several descriptive and analytical methods, by distributing (150) questionnaires to a sample of the administrative leaders in the Asiacell Telecom Company in Iraq, and in light of the statistical results, a set of conclusions, including: The contribution of business intelligence to achieving sustainable performance through the existence of moral relationships and influence between them. It came out with proposals, including: Giving more attention by the leaders of organizations to the dimensions that express business intelligence and working to adopt them for their role in sustainable performance
Information and Communication Technology and Its Reflections on Human Resources Management Practices
Get PDFThe study dealt with two variables of great importance to organizations represented by Information Technology and Communications expressed in their scope (hardware and equipment, software, communications and users) and human resource management practices represented by (human resource planning, employment, training and development, Compensation and incentives and performance evaluation), accordingly the study aimed to determine the repercussions or impact of Technology Information and Communication on human resource management practices in the Mosul Municipality Directorate in Nineveh governorate, The questionnaire was used as a tool for data collection distributed to a sample of (100) person who representing the managers in the field of research organization under study, and several statistical methods were used in the analysis of this data, Statistician Program (SPSS, Ver.26).The study reached several conclusions that confirmed as well as the existence of interrelationships and influence between information and communication Technology and human resource management practices at The level of their whole and partial scope.
Kindness to animals and spending on them in Islamic jurisprudence
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,????? ????? ????? ?? ???? ????? ????? ??? ??????? ??????? ??? ??????? ???? ??? ???? ??????? ??????? ??????? ???? ??????? ?? ?????? ??????? ?? ??? ???????? ?????? ??? ????? ???? ?? ????? ????? ??? ??????? ???????? ?????? ??????? ???????? ?? ???? ???????? ????? ????? ??????? ??????? ???????? ??? ??????? ???????? ?????? ????? ?? ??????????? ???? ?????? ?? ?????? ????? ??? ????? ??????? ???????? ?? ?? ???? ?????? - ?? ???? ????? ?????? ???? ?????? ????? ???????.This Research Aims to Explain The jurisprudential ruling on
animal maintenance and its impact on Islamic jurisprudence and
follow the importance of research by highlighting the legal
rooting, Islam looks at the animal world in general with great
interest due to its importance in life and its cooperation in the
benefit of man, standing on important chapters from the chapters
of jurisprudence, which are the chapters related to the human
relationship with animals from the expense and treatment, and the
statement of the prohibition and criminalization of Islam to attack
and harm animals, and it included a number of conclusions that I
was able to reach after studying the subject and knowing it in all
its aspects - within the limits of the Researcher's knowledge and
the breadth of the papers of the Research raised