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Large-amplitude dust acoustic solitons in an opposite polarity dusty plasma with generalized polarization force

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Chinese Physics B 2022年第1期31卷 199-207页

作者： mahmood A.H.Khaled mohamed A.Shukri Yusra A.A.Hager Department of Physics Faculty of Education(Al-Mahweet)Sana'a UniversitySana'aYemen Department of Physics Faculty of ScienceSana'a UniversitySana'aYemen Department of Physics Faculty of EducationSana'a UniversitySana'aYemen

Linear and nonlinear dust acoustic(DA)waves have been investigated in an opposite polarity dusty plasma comprising negatively and positively charged dust grains,Maxwellian electrons and ions,including the generalized polarization force *** properties of linear DA waves have been significantly altered by the dual dust polarity and polarization *** amplitude DA solitons have been discussed in the framework of the Sagdeev potential *** results show that both rarefactive and compressive solitons can exist in such a dusty *** basic features of the Sagdeev potential have been examined under the effect of the polarization force parameter R,the ratio of the charge number of the positive dust to that of the negative dust Z,and the Mach number *** results show that these parameters play a significant role in determining the region of existence of large amplitude DA solitons.

关键词： large amplitude opposite polarity dusty plasma polarization force

Investigating and predicting the role of photovoltaic, wind, and hydrogen energies in sustainable global energy evolution

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Global Energy Interconnection 2024年第4期7卷 429-445页

作者： mahmood Swadi Dheyaa Jasim Kadhim mohamed Salem Firas Mohammed Tuaimah Ammar Sabri Majeed Ali Jawad Alrubaie Department of Electrical Engineering College of EngineeringUniversity of BaghdadBaghdad 10001Iraq Libyan Authority for Scientific Research Tripoli 80045Libya School of Electrical and Electronic Engineering Universiti Sains Malaysia(USM)Nibong Tebal 14300PenangMalaysia Continuing Education Center University of BaghdadBaghdad 10001Iraq Al-Furat Al-Awsat Technical University AL-Mussaib Technical CollegeBabylonIraq

The global shift toward next-generation energy systems is propelled by the urgent need to combat climate change and the dwindling supply of fossil *** review explores the intricate challenges and opportunities for transitioning to sustainable renewable energy sources such as solar,wind,and *** transition economically challenges traditional energy sectors while fostering new industries,promoting job growth,and sustainable economic *** transition to renewable energy demands social equity,ensuring universal access to affordable energy,and considering community *** environmental benefits include a significant reduction in greenhouse gas emissions and a lesser ecological *** study highlights the rapid growth of the global wind power market,which is projected to increase from$112.23 billion in 2022 to$278.43 billion by 2030,with a compound annual growth rate of 13.67%.In addition,the demand for hydrogen is expected to increase,significantly impacting the market with potential cost reductions and making it a critical renewable energy source owing to its affordability and zero *** 2028,renewables are predicted to account for 42%of global electricity generation,with significant contributions from wind and solar photovoltaic(PV)technology,particularly in China,the European Union,the United States,and *** developments signify a global commitment to diversifying energy sources,reducing emissions,and moving toward cleaner and more sustainable energy *** review offers stakeholders the insights required to smoothly transition to sustainable energy,setting the stage for a resilient future.

关键词： Next energy Renewable energy Sustainability Environmental benefits Economic opportunities

Weapons Detection for Security and Video Surveillance Using CNN and YOLO-V5s

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Computers, Materials & Continua 2022年第2期70卷 2761-2775页

作者： Abdul Hanan Ashraf Muhammad Imran Abdulrahman M.Qahtani Abdulmajeed Alsufyani Omar Almutiry Awais mahmood Muhammad Attique mohamed Habib Department of Computer Science Shaheed Zulfikar Ali Bhutto Institute of Science and TechnologyIslamabad44000Pakistan Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia College of Applied Computer Science King Saud University(Almuzahmiyah Campus)Riyadh11543Saudi Arabia Department of Computer Science HITEC UniversityTaxila47080Pakistan College of Computing and Informatics Saudi Electronic UniversityRiyadhSaudi Arabia Faculty of Engineering Port Said UniversityPort Fuad CityEgypt

In recent years,the number of Gun-related incidents has crossed over 250,000 per year and over 85%of the existing 1 billion firearms are in civilian hands,manual monitoring has not proven effective in detecting *** is why an automated weapon detection system is *** automated convolutional neural networks(CNN)weapon detection systems have been proposed in the past to generate good ***,These techniques have high computation overhead and are slow to provide real-time detection which is essential for the weapon detection *** models have a high rate of false negatives because they often fail to detect the guns due to the low quality and visibility issues of surveillance *** research work aims to minimize the rate of false negatives and false positives in weapon detection while keeping the speed of detection as a key *** proposed framework is based on You Only Look Once(YOLO)and Area of Interest(AOI).Initially,themodels take pre-processed frames where the background is removed by the use of the Gaussian blur *** proposed architecture will be assessed through various performance parameters such as False Negative,False Positive,precision,recall rate,and F1 *** results of this research work make it clear that due to YOLO-v5s high recall rate and speed of detection are *** reached 0.010 s per frame compared to the 0.17 s of the Faster *** is promising to be used in the field of security and weapon detection.

关键词： Video surveillance weapon detection you only look once convolutional neural networks

Analysis of cerium substitution in Co-Sr based spinel ferrites for high frequency application

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Journal of Rare Earths 2024年第9期42卷 1755-1763,I0005页

作者： Laura Khudaysh Inas A.Ahmed Syeda Rabia Ejaz Sajjad Ahmad Khan Yasir A.Haleem mohamed M.Ibrahim mahmood Ali Hafiz Muhammad Tahir Farid Zeinhom M.El-Bahy Department of Physics Faculty of ScienceJazan UniversityJazan45142Saudi Arabia Department of Chemistry Faculty of ScienceKing Khalid UniversityAbha62224Saudi Arabia Department of Physics The Government Sadiq College Women UniversityBahawalpur63100Pakistan Institute of Physics Khwaja Fareed University of Engineering and Information TechnologyRahim Yar Khan64200Pakistan Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Centre of Excellence in Solid State Physics University of the PunjabLahorePakistan Department of Physics Government CollegeTaunsa Sharif32200Pakistan Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City11884CairoEgypt

Spinel ferrites exhibit exceptional magnetic properties,making them a distinctive class of magnetic *** sol-gel technique was utilized for the synthesis of spinel ferrites with the chemical formula Co_(0.6)Sr_(0.4)Ce_(x)Fe_(2-x)O_(4). Following that,a comprehensive X-ray diffraction analysis unveiled the crystalline cubic structure of the synthesized *** the utilization of the M-H loop approach,the ferromagnetic attributes of ferrites were assessed,and the assimilation of rare earth elements led to substantial enhancements in saturation magnetization,remanence,and *** ferrites with a high concentration of rare earth elements have improved direct current resistivity and activation *** logarithm of a material's resistance increased from 5.29 to 8.12 Ω·cm as cerium is *** a change in the amount of cerium,the activation energy goes up from 0.19 to *** changing the frequency from 5.5 to 9.5 GHz,the dielectric characteristics were *** the frequency goes up,the dielectric constant goes *** ferrites that have been made better in every way can be used in high-frequency applications.

关键词： Activation energy DC electrical resistance Remanence magnetization Cobalt strontium spinel ferrites High frequency application Rare earths

Application of in-house method for determinationof radium isotopes in environmental samples usingthe Liquid Scintillation counting technique

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Journal of Analytical Sciences, Methods and Instrumentation 2011年第1期1卷 1-8页

作者： Nik Azlin Nik Ariffin Zal Uyun Wan mahmood Che Abd Rahim mohamed 不详

A method for determination of 226Ra and 228Ra in environmental samples using the α-β coincidence liquid scintillation counting (LSC) has been developed. Radium were preconcentrated from environmental samples by coprecipitation with BaSO4, then purified from others radionuclide interferences using the cation column exchange (Bio-Rad AG 50 W-X4 resin with 200-400 mesh size and H+ form) and operating in warm temperature which is between 70-80oC. Then, the Ba(Ra)SO4 precipitate was filtered through the Millipore filter paper, dried and weighed to calculate chemical yield. The activity concentration of radium isotopes in mixture of liquid scintillation cocktails were measured using LSC after being stored for over 21 days to allow the growth of the progeny nuclides. The method has been validated with a certi-fied reference material supplied by the International Atomic Energy Agency and reliable results were obtained. The radiochemical yields for radium were 59% - 90% and recovery was 97% and 80% for 226Ra and 228Ra, respectively. Sixteen seawater and fish flesh samples collected in Kapar coastal water have been analyzed with the developed method. The obtained radium activity concentrations in seawater were in the range of 02.08 ± 0.82 mBq/L to 3.69 ± 1.29 mBq/L for 226Ra and 6.01 ± 3.05 mBq/L to 17.07 ± 6.62 mBq/L for 228Ra. Meanwhile, the activity concentrations of 226Ra and 228Ra in fish flesh were in the range of 11.82 ± 5.23 – 16.53 ± 6.53 Bq/kg dry wt. and 43.52 ± 16.34 – 53.57 ± 19.86 Bq/kg dry wt., respectively.

关键词： 226Ra 228Ra Environmental Samples Chemical Yield Liquid Scintillation Counting

Pyomyoma as a Complication of Uterine Artery Embolization (A Case Report)

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Open Journal of Obstetrics and Gynecology 2024年第1期14卷 29-35页

作者： Abrar Tooq Layla Rafeei Nusrat Kazi Safa Hussain mohamed Al-Tabban Mariam mahmood Salmanyia Medical Complex Manama Bahrain

Pyomoyoma is a rare complication of Uterine Artery Embolization (UAE). This case report reflects on this condition. A 45-year-old female, a known case of adenomyosis, presented with intermittent fever and foul vaginal discharge. These symptoms occurred shortly after the patient underwent UAE for menorrhagia secondary to adenomyosis. Computed tomography scan of the abdomen and pelvis aided in the diagnosis of Pyomyoma secondary to UAE. After a trial of broad spectrum antibiotics and Suction and Evacuation of the uterus had little to no help in the patient’s condition, she underwent Total Abdominal Hysterectomy in which a big, organized pus collection was removed from the uterus. Conclusion: Pyomyoma should be considered in the differentials for patients presenting with fever and vaginal discharge post UAE.

关键词： Pyomyoma Uterine Artery Embolization Adenomyosis

Causative bacteria of ventilator-associated pneumonia in intensive care unit in Bahrain:Prevalence and antibiotics susceptibility pattern

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World Journal of Critical Care Medicine 2023年第3期12卷 165-175页

作者： mohamed Eliwa Hassan Safaa Abdulaziz Al-Khawaja Nermin Kamal Saeed Sana Abdulaziz Al-Khawaja mahmood Al-Awainati Sara Salah Yusuf Radhi mohamed Hameed Alsaffar Mohammed Al-Beltagi Intensive Care Unit Department of Internal medicineSalmaniya Medical ComplexMinistry of HealthManamaKingdom of BahrainManama 12ManamaBahrain Infectious Disease Unit Department of Internal MedicineSalmaniya Medical ComplexMinistry of HealthKingdom of BahrainManama 12ManamaBahrain Medical Microbiology Section Department of PathologySalmaniya Medical ComplexMinistry of HealthKingdom of BahrainManama 12ManamaBahrain Medical Microbiology Section Department of PathologyIrish Royal College of SurgeonBahrainBusiateen 15503MuharraqBahrain Department of Family Medicine Ministry of HealthManamaKingdom of BahrainManama 12ManamaBahrain Department of Pediatrics Faculty of MedicineTanta UniversityTanta 31511AlghrabiaEgypt Department of Pediatrics University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityDr.Sulaiman Al Habib Medical GroupManama 26671ManamaBahrain

BACKGROUND Ventilator-associated pneumonia(VAP)is defined as pneumonia that occurs two calendar days following endotracheal intubation or after *** is the most common infection encountered among intubated *** incidence showed wide variability between *** To define the VAP incidence in the intensive care unit(ICU)in the central gove-rnment hospital in Bahrain and review the risk factors and the predominant bacterial pathogens with their antimicrobial susceptibility *** The research was a prospective cross-sectional observational study over six months from November 2019 to June *** included adult and adolescent patients(>14 years old)admitted to the ICU and required intubation and mechanical *** was diagnosed when it occurred after 48 h after endotracheal intubation using the clinical pulmonary infection score,which considers the clinical,laboratory,microbiological,and radiographic *** The total number of adult patients admitted to the ICU who required intubation and mechanical ventilation during the study period was ***-six patients developed VAP during their ICU stay(29.7%).The calculated VAP rate was 22.14 events per 1000 ventilator days during the study period,with a mean age of 52 years±*** VAP cases had late-onset VAP with a mean number of ICU days before the development of VAP of 9.96±***-negative contributed to most VAP cases in our unit,with multidrug-resistant Acinetobacter being the most identified *** The reported VAP rate in our ICU was relatively high compared to the international benchmark,which should trigger a vital action plan for reinforcing the implementation of the VAP prevention bundle.

关键词： Ventilator-associated pneumonia Intensive care unit Antibiotics susceptibility pattern Kingdom of Bahrain Adults Bacterial resistance Acinetobacter

信息通讯技术对于政府转型和公民信任的作用研究

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国际行政科学评论（中文版） 2020年第4期 121-144页

作者：穆罕默德·马哈茂德维尚斯·维拉科迪陈伟峰王冬芳(译) 王伊(审校) 英国伦敦布鲁内尔大学英国布拉德福德大学中国政法大学政治与公共管理学院不详

本文基于退出—呼吁(exit-voice theory)理论建立起经实证检验的概念模型,研究信息通讯技术推动的政府转型对公民信任所产生的影响。本文界定并阐释了影响政府转型对公民信任发挥作用的关键要素,诸如政府绩效和透明度。巴林是海湾合作... 详细信息

本文基于退出—呼吁(exit-voice theory)理论建立起经实证检验的概念模型,研究信息通讯技术推动的政府转型对公民信任所产生的影响。本文界定并阐释了影响政府转型对公民信任发挥作用的关键要素,诸如政府绩效和透明度。巴林是海湾合作委员会地区(the Gulf Cooperation Council region)采用信息与通讯技术最高的国家,基于来自该国的313份调查回复,我们检验了政府转型与公民信任之间的中介变量——政府绩效和透明度。本文所形成的初步见解在信息通讯技术推动的政府转型背景下公民信任的测量与展示方面具有丰富的政策意涵。同时也拓展了我们对于信息通讯技术推动的政府转型是如何改善政府与公民关系以及数字服务运用等方面的理解。

关键词：巴林公民信任信息通讯技术绩效政府转型透明度