Physical Sciences and Mathematics Commons^™

Numerical Study On The Aerodynamic Performance Of Four Flettner Rotors By Varying Distance And Spin Ratio, Janghoon Seo, Dong-Woo Park

Journal of Marine Science and Technology

The Flettner rotor is a wind-assisted propulsion system applied in eco-friendly ship to reduce greenhouse gas emissions. As the requirements of international regulations on greenhouse gas emissions become increasingly strict, multiple Flettner rotors are being applied, necessitating the evaluation of their performance with varying design parameters. The present study focuses on the aerodynamic performances of four Flettner rotors with variable design parameters of distance and spin ratio. Distances and spin ratios, including relative spin ratios, are considered. The drag and lift coefficients and lift-to-drag ratio of Flettner rotors are determined using Computational Fluid Dynamics (CFD), and the associated flow fields …

Distribution And Population Structure Of Corallivorous Drupella Snails In The Coral Reefs Of Kenting In Taiwan, Chih-Jui Tan, Dun-Ru Kang, Li-Lian Liu

Journal of Marine Science and Technology

The corallivorous Drupella snails are common predators of living hard corals in the Indo-Pacific Ocean, and they can significantly threaten coral reef ecosystems when outbreaks occur. In Taiwan, a Drupella outbreak, which resulted in the dramatic decline of Acropora and Montipora corals, was reported in Penghu in 2002 – 2009. However, the Drupella species involved was not identified, and no further research has been conducted. To obtain current knowledge on the predation pressure of corallivorous snails on hard corals, we investigated benthic communities and the distribution and population structure of Drupella snails in the coral reefs of Kenting, Taiwan. The …

Virtual Reality & Pilot Training: Existing Technologies, Challenges & Opportunities, Tim Marron M.S., Niall Dungan Bsc, Captain, Brian Mac Namee Phd, Anna Donnla O'Hagan Phd

Journal of Aviation/Aerospace Education & Research

The introduction of virtual reality (VR) to flying training has recently gained much attention, with numerous VR companies, such as Loft Dynamics and VRpilot, looking to enhance the training process. Such a considerable change to how pilots are trained is a subject that warrants careful consideration. Examining the effect that VR has on learning in other areas gives us an idea of how VR can be suitably applied to flying training. Some of the benefits offered by VR include increased safety, decreased costs, and increased environmental sustainability. Nevertheless, some challenges ahead for developers to consider are negative transfer of learning, …

Application Of Density Altitude Climatology To General Aviation Impacts, Thomas A. Guinn Ph.D., Daniel J. Halperin Ph.D., Sarah Strazzo Ph.D.

Journal of Aviation/Aerospace Education & Research

Density altitude (DA) plays a key role in flight safety because it helps pilots anticipate poor aircraft performance when temperatures are warmer than standard. In this study, a 30-year climatology of DA for the conterminous United States was created using the fifth-generation European Centre for Medium-Range Weather Forecasts atmospheric reanalysis of the global climate (ERA5) dataset was applied to four separate DA-based, aircraft-performance, rules-of-thumb for general aviation (GA) flight. The goal was to demonstrate a technique to create educational visualization tools showing the variation of operational flight impacts with both month and location. Four such parameters were chosen to show …

Why Is Grant Lake A Reservoir? A Brief Geological And Human History, From The Pleistocene To The Present, Robert B. Marks

Eastern Sierra History Journal

Drawing on a range of archival resources and illustrative material, Prof. Marks probes why and how Grant Lake in the Eastern Sierra of California became a reservoir. The process is long and involved, and has much to do with a remote and ancient lake ultimately being developed to serve the water needs of the distant city of Los Angeles.

Machine Learning - Hail Awareness Spatial Analysis Toolkit (Hasat), Haoruo Fu M.S., Joseph P. Hupy Ph.D., Chien-Tsung Lu Ph.D., Zhenglei Ji M.S.

Journal of Aviation/Aerospace Education & Research

The National Airspace System (NAS) is a sophisticated network of air traffic control, navigation, and communication systems that play a critical role in ensuring the safe and efficient flow of air traffic across the United States. However, the occurrence of severe weather conditions, particularly hailstorms, poses a significant threat to flight safety within the NAS. To mitigate the risks associated with hail, aviation organizations have implemented a range of safety measures. This study utilized Esri’s ArcGIS as a mapping software to conduct a geospatial analysis of the impact of severe weather, particularly hail, on the NAS. The Hail Awareness Spatial …

Low-Resource Automatic Speech Recognition Domain Adaptation – A Case-Study In Aviation Maintenance, Nadine Amin M.S., Tracy L. Yother Ph.D., Julia Rayz Ph.D.

Journal of Aviation/Aerospace Education & Research

With timeliness and efficiency being critical in the aviation maintenance industry, the need has been growing for smart technological solutions that optimize and streamline the different underlying tasks (Bergkvist & Sabbagh, 2021). One such task is the technical documentation of the performed maintenance operations (Chandola et al., 2022). Instead of manual documentation, voice tools that transcribe spoken logbook entries allow technicians to document their work right away in a hands-free and time efficient manner. However, an accurate automatic speech recognition (ASR) model requires large training corpora (Siyaev & Jo, 2021a), which are lacking in the domain of aviation maintenance. In …

A Novel Scheme Based On Bessel Operational Matrices For Solving A Class Of Nonlinear Systems Of Differential Equations, Atallah El-Shenawy, Mohamed El-Gamel, Muhammad E. Anany

Mansoura Engineering Journal

The system of ordinary differential equations arises in many natural phenomena, especially in the field of disease spread. In this paper, a perfect spectral technique is introduced to solve systems of nonlinear differential equations. The technique enhanced the Bessel collocation technique by converting the series notation of unknown variables and their derivatives to matrix relations. The Newton algorithm is developed to solve the resulting nonlinear system of algebraic equations. The effectiveness of the scheme is proved by the convergence analysis and error bound as demonstrated in Theorem 1. The scheme of solution is tested to clarify the efficiency and the …

On (K*-N)N-Quasi Normal Operators, Aya Mazin Falih

Al-Qadisiyah Journal of Pure Science

The objective is to present a novel variant of a quasi-normal operator, specifically the quasi normal operator, alongside the introduction of related theorems, propositions, and illustrative examples elucidating this concept. Additionally, we present the necessary and sufficient conditions for addition and multiplication of this kind of operators.

Numerical Methods For Statistical Data Generation, Hayder Abdulabbas

Al-Qadisiyah Journal of Pure Science

A comprehensive comparison was undertaken between two numerical methods, namely bisection and secant methods, to generate a random variable data for distribution. two methods were suggested to acquire the initial guesses for secant and interval for the bisection method. The results of 100 cases for the choices of the parameters are shown and a comparison was made according to the number of iterations between the methods was conducted.

Using A Combination Technique Of Two Computational Methods To Solve The Integro-Differential Equation, Junaid Idrees Mustafa, Ahmed Farooq Qasim

Al-Qadisiyah Journal of Pure Science

The present paper investigates a mathematical technique for determining nonlinear integro-differential equations that is based on a combination of the Bownds and Range-Kutta methods. There will be a discussion of what is meant by this class of nonlinear Fredholm equations, as well as an explanation of the mathematical method for this kind of equation. The Bownds technique is used to produce the differential equations from the integral equation obtained from the integro-differential equations. Then, the approximate solution of the differential equation(s) is derived by applying the Range-Kutta method. Through solving three different examples, we prove that the combination of mathematical …

The Relationship Between Smoking And Small Cell Lung Cancer: The Most Important Developments In Cancer Treatment, Esraa Abdul Wahhab Ati

Al-Qadisiyah Journal of Pure Science

This research delves into the relationship between smoking and small cell lung cancer (SCLC) while highlighting the most important developments in cancer treatment. The study reveals that smoking remains the main risk factor for SCLC disease, as the majority of patients are current or former heavy smokers. The incidence and mortality rates of SCLC emphasize the urgent need for effective smoking cessation programs to fight this aggressive disease.

The research identifies compound chemotherapy as the primary first-line treatment for small cell carcinoma, especially platinum-based systems in combination with etoposide or irinotecan. These therapeutic approaches have shown significant initial response rates, …

Thermodynamic Optimization Of Diesel Engines Equipped With Shemax Injection System Using Genetic Algorithm, Salam Hussein Al-Alaq, Mohammed Khlaif Challab

Al-Qadisiyah Journal of Pure Science

Diesel engines equipped with spark plug injection system refer to those engines in which the mixture of natural gas and air enters the cylinder in the suction cycle and then a small amount of diesel fuel is sprayed into the cylinder during the power cycle as ignition fuel or spark plug injection. to be One of the main features of spark plug injection engines is the drastic reduction of pollution caused by diesel burning. In this research, the investigation and analysis of these engines have been done from the point of view of energy and exergy. For this purpose, the …

Association Between Cnr2 Gene Expression And The Risk Of Diabetes Mellitus Disease, Shurooq Hussein Al Jebur

Al-Qadisiyah Journal of Pure Science

Endocannabinoid system (ECS) implicated in lipid and glucose metabolism, energy homeostasis expenditure and energy intake. In current study we focused on specific member of ECS which is CB2R . It is expressed in splenic tissue and immune cells. CB2R is one of the newest target of drug to treat chronic inflammatory diseases. This project aimed to assess the transcript level of CB2R in diabetic mellitus patients compare with its level in control group and evaluating some biochemical parameters including (glucose, cholesterol and triglyceride). As well as to characters the correlation type between above biochemical parameters and CB2R expression in patients …

Study Of Algebra Integration And Analysis In Teaching Mathematics And Its Applications, Mohsen Taher Muslim

Al-Qadisiyah Journal of Pure Science

Algebra and analysis are considered the basic fundamentals in the mathematical field. Algebra deals with properties and relationships between numbers, variables, and functions. Algebra is considered a mathematical system that studies mathematical operations, mathematical relationships, and mathematical structures, while analysis focuses on studying limits, change, and integratio Research goal is to expand and deepen students understand the mathematical concepts related to algebra and analysis, and the relationships and interactions between the various concepts are analyzed and described accurately, which helps students build a strong foundation for mathematical knowledge. The research relied on the descriptive analytical approach to determine the nature …

Analysis Of The Use Of Technology In Teaching Differential Equations And Their Practical Applications, Mohsen Taher Muslim

Al-Qadisiyah Journal of Pure Science

Differential equations are considered one of the important topics in applied mathematics, physics, and engineering. Thanks to technological progress, it has become possible to use technology in teaching differential equations in innovative and effective ways. The use of technology in teaching differential equations helps improve students’ understanding and enhance their abilities in solving practical and applied problems. The goal of the research is to indicate that the use of interactive software and applications allows the creation of a dynamic and interactive learning environment. Students can change equations and parameters and explore to learn about the results and relationships between them. …

A Hybrid Approaches For Medical Image Compression: Survey, Hashim Adnan, Ali O Beid, Ali Al-Fayadh

Al-Qadisiyah Journal of Pure Science

Data compression is necessary for the storing, transfer, and manipulation of digital data in today's rapidly changing world due to the widespread use of medical technology and the vast data creation by various medical modalities. Many scientists and engineers have proposed new compression processes, methods, and algorithms in recent years. There is a discussion of the current state of these compression strategies, including their recent advances in the form of hybrid techniques, performance requirements, legal challenges, and the potential to advance medical technology.

Job Scheduling By Using Swarm Intelligent Algorithms: Survey, Ruqaya Ahmed, Luma S.Hasan

Al-Qadisiyah Journal of Pure Science

The job scheduling problem is used in industry, manufacturing, job planning, and the network environment to manage users jobs on the right machines with different limitations. There are three types of job scheduling problems. Firstly, job shop scheduling means each job is executed on a determined sequence of machines specified previously. While in the flow shop scheduling problem, each job can be carried on one idle sequencing using a job queue. In the third type, open shop, the sequence of jobs can be carried out on any free machine. This paper describes the various types of job scheduling problems and …

Interpolation In Non-Continuous Functions Spaces, Jawad K. Judy

Al-Qadisiyah Journal of Pure Science

In this research I will introduce a new method to an approximation in non-continuous functions space and estimate a degree of this approximation (Note that this function must be bounded) by define a new norm depending on union it together with a continuous function (I call it the compensation function) where the resulting functions from this union must be a continuous. This is possible for any continuous function but in this papers I will choose this function as an algebraic polynomial because our know of properties of polynomials in approximation theory Specifically, I will choose it as an interpolation polynomial …

Digital Wallets Evolution: Navigating Challenges, Innovation And The Future Landscape, Asmaa A. Mohmmed, Abdul Monem S. Rahma, Hala Bahjat Abdulwahab

Al-Qadisiyah Journal of Pure Science

The goal of enabling small business owners and customers to accept digital payments for cashless, safe, and effective transactions has propelled the growth of electronic wallets, commonly known as digital wallets or e-wallets. E-wallet design has made it a priority to give consumers a practical, safe, and efficient way to manage their digital assets, such as cryptocurrencies, whereas facilitating online transactions. The presented research developed a technique to pinpoint the transactional structure of digital economy's e-wallet payment system. The purpose of the presented research is to offer a reliable and trustworthy analysis which will increase public awareness of digital currency …

Synthesis, Characterization And Latent Fingerprints Detection Of Novel Azo Dye Based On Curcumin And Its Pd (Ii) Complex, Wesam Dheyab Kzar, Hasan Shamran Mohammed, Álvaro Fernández Álvarez, Vishwa Deepak Tripathi, Zizi Zahia

Al-Qadisiyah Journal of Pure Science

Azo dye ligand (DCPAC) namely (1E,6E)-4-((E)-(2,5-dichlorophenyl)diazenyl)-1,7- bis(4-hydroxy-3-methoxyphenyl)hepta-1,6-diene-3,5-dione was prepared by coupling diazonium salt of 2,5-dichloroaniline with curcumin in basic conditions. The ligand (DCPAC) and its Pd(II) complex were characterized by elemental analysis (C.H.N.), mass spectroscopy, 1H NMR, FT-IR, UV-Visible spectra, and molar conductivity. The molar ratio method was applied to ascertain the stoichiometric composition of pd(II) complex in aqueous solution which was 1:2 (metal ion to ligand). Azo curcumin ligand binding with Pd (II) ion used the enolate form moiety of curcumin under alkaline conditions which was observed by infrared spectra. New azo curcumin (DCPAC) and its Pd(II) complex have …

Anti-Hyperglycemic Potential Of Desplatsia Dewevrei (De Wild. & Th. Dur) Burret Methanol Seed Extract In Diabetic Wistar Rats, Macdonald Idu, Benjamin Ogunma Gabriel, Miracle Ogechukwu Osunde, Oghale Ovuakporie-Uvo Godwin

Al-Qadisiyah Journal of Pure Science

This study investigate the anti-hyperglycemic effect of Desplatsia dewevrei seed methanol extract in diabetic rats. A standard protocol was modified using forty (40) Wistar rats in five groups. The standard control (10 mg/kg Glibenclamide), the untreated control group (45 mg/kg streptozotocin) (STZ), and graded doses (30, 50 and 100 mg/kg) of D. dewevrei seed methanol extract were administered after inducing diabetes. The blood glucose level were observed in days 1, 7 and 14. The animals were sacrificed, blood and organ samples were isolated and analyzed for their biochemical and histopathological evaluations. The results obtained showed a significant decrease in the …

Effect Of Alcoholic Extract Of Agaricus Bisporus On Blood Profiles And Immune Response In Rats With Aspergillosis, Athraa Abbass Jawad, Neeran Obied Jasim

Al-Qadisiyah Journal of Pure Science

Aspergillus Fumigatus is an opportunistic fungal pathogen that causes a range of infections in humans, particularly in immunocompromised individuals. In this study, we investigated the therapeutic potential of A. bisporus extract for treating A. fumigatusinduced pulmonary infection in mice. Mice were inoculated with A. fumigatus and then treated with A. bisporus extract for 21 days. We found that A. bisporus extract and voriconazole treatments affect WBC count, with the extract-treated groups and voriconazole-treated group showing lower counts compared to infected mice without treatment, A. bisporus extract-treated groups display higher RBC counts, while voriconazole treatment results in lower RBC count compared …

Using Nanotechnology To Removal Of Pollution From Water, Firas Ali Hussein Alhameedawi

Al-Qadisiyah Journal of Pure Science

In order to refinery the polluted water, there are some method that Nano filter be presented to this issue recently. In this research FEM analysis be applied to simulation of refinery with Nano filters. There were four Nano filter to refinery of nanoparticles in water that are zeolite, Nano carbon, nanotube and Nano magnet. Generally the Nano filter with each material has performance the 80 % up that are suitable to refinery of water. But Nano magnet and Nano zeolite has the best performance in comparison with other nanomaterial. Cavity of Nano filter should be small to better absorption of …

Antipyretic, Anti-Inflammatory And Analgesic Activity Of Polyherbal Formulation (Agbo-Iba Pmii) Used In The Treatment Of Malaria In Southern Nigeria, Pass Chidiebere Chijindu, Macdonald Idu, Benjamin Ogunma Gabriel

Al-Qadisiyah Journal of Pure Science

The ideal antimalarial agent should not only possess antiplasmodial effects but also anti-inflammatory, antipyretic and analgesic activities. Hence, the aims of were to investigate the antipyretic, anti-inflammatory and analgesic activities of a traditional polyherbal formulation (Agbo-Iba PMII) used to treat malaria in Southern Nigeria. The antipyretic activity was determined by employing three models viz Yeast-induced hyperthermia, D-Amphetamine-induced hyperthermia and 2, 4- Dinitrophenol-induced hyperthermia. The anti-inflammatory activity was determined by employing the carrageenan induced rat paw oedema assay model. While the analgesic activity was determined by employing three models viz Acetic acid induced writhing, Hot Plate Method and Analgesy-meter Test (Randall- …

Testing The Ciprofloxacin And Erythromycin Antibiotics Potency Against E. Coli Bacteria Isolated From Pregnant Women With Urinary Tract Infections, Khetam Ibrahim Almhanna

Al-Qadisiyah Journal of Pure Science

The current study included collecting data on pregnant women who suffer from urinary tract infections by 70 patients from the Women's and Children's Teaching Hospital in the city of Al-Diwaniyah The distribution of the severity of the injury for the studied cases was divided into four severity cases (mild +, moderate ++, severe +++, and very severe ++++). The most cases admitted to the hospital were from the severity ( +), and the least was(++++). As for the frequency of urinary tract infections in women before pregnancy, the results showed that 22 (31.43 %) of the investigated cases had urinary …

Removal Of Pb(Ii) And Cu(Ii) From Water Using Silver Nanoparticles Prepared Using Extract Plant (Albizia Odoratissima), Mohammed Khlaif Challab

Al-Qadisiyah Journal of Pure Science

This work concerns the research on the use of silver nanoparticles prepared using extract plant “Albizia odoratissima” as a highly active and economical adsorbent for the removal of Pb+2 & Cu+2 ions from their aqueous solutions. The)AgNPs(are produced using a green, environmentally friendly, non-toxic method that does not use harmful chemicals substances using a plant extract as a reducing agent. The)AgNPs(checked is characterized using " Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectrometry (FTIR)". The results showed that the equilibrium time of adsorption was 40 minutes, at pH=8, pH=6 for Pb+2 & Cu+2, respectively and at the temperature (30 …

Preliminary Phytochemistry, In-Vitro Antioxidant And Reducing Effect Of Intraocular Pressure Of Pleurotus Tuber-Regium (Fr) Sing Using Animal Model, Stella Ejuvwevwokoghene Odjimogho, Faustina K. Idu, Macdonald Idu, Sunny Emoefe Odjimogho, Ann Theresa Akaeze, Benjamin Ogunma Gabriel

Al-Qadisiyah Journal of Pure Science

This study investigate the qualitative and quantitative phytochemicals, antioxidant screening, and the reducing effect of intraocular pressure of P. tuber-regium aqueous extract in rabbits. Standard protocols were used to analyze the qualitative and quantitative phytochemical, in-vitro antioxidant studies ferric reducing antioxidant power (FRAP), total antioxidant capacity) and 1, 1-diphenyl-2-picrylhydrazyl (DPPH) were also used to assess these plants. Thirty (30) New Zealand male rabbits were randomly selected for this study. The whole group except normal control were induced with 1% Prednisolone acetate suspension for 3 days to obtain the baseline intraocular pressure (IOP) >5-10 mm Hg, afterward treated with a graded …

Large-Small Quasi-Dedekind Modules, Amira A. Abduljaleel

Al-Qadisiyah Journal of Pure Science

Let R be a ring with identity. An R module W is called small quasi-Dedekind, (small quasi-D) if for each homomorphism h such that h is nonzero, then kerh is small in W. In this paper we introduce a new concept called Large- small quasi-Dedekind (L-small quasi-D) module which is a generalization of small quasi-Dedekind module.

Phytochemicals, Nutritional And Antibacterial Evaluation Of A Domestic Plant –Tetradenia Riparia, Akens Hamilton-Amachree, Dorcas A. Fadare, Ngozi M. Uzoekwe, Ikechukwu P. Ejidike

Al-Qadisiyah Journal of Pure Science

Medicinal plants have been established to be endowed by nature as sources of phytochemicals employed in the treatment and management of various health disorders. Preliminary phytochemical composition and mineral content of Tetradenia riparia leaf was analyzed, using standard procedures. The radical scavenging ability of the methanol extract was determined using the DPPH assay. Flavonoids, phenols and tannins were detected in abundance in the phytochemical analysis. At 500 μg/mL, it had percentage inhibition of 68% when compared with ascorbic acid, the standard reference drug which was 85%. Antibacterial investigation of both the dry and wet leaf extracts in ethanol and water …