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The Impact of Hydrogen Energy Storage on the Electricity Harvesting

Intelligent Automation & Soft Computing 2023年第5期36卷 1963-1978页

作者： ghassan mousa Ayman A.Aly Imran Khan DagØivind Madsen Department of Mechanical Engineering Faculty of EngineeringK.C.KARE Energy Research and Innovation CentreKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Mechanical Engineering College of EngineeringTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Electrical Engineering University of Engineering&Technology PeshawarPakistan University of South-Eastern Norway Bredalsveien 143511 HønefossNorway

The economics,infrastructure,transportation,and level of living of a country are all inﬂuenced by *** gap between energy usage and availabil-ity is a global ***,all countries rely on fossil fuels for energy genera-tion,and these fossil fuels are not *** hydrogen proton exchange membrane fuel cell(PEMFC)power system is both clean and efﬁ*** fuel delivery system and the PEMFC make up the majority of the PEMFC power *** lack of an efﬁcient,safe,and cost-effective hydrogen storage system is still a major barrier to its widespread *** hydrogen storage has the large capacity,safety and good *** a hydrogen source system,the hydro-gen supply characteristics affect the characteristics of the PEMFC at the *** this paper,a mathematical model of a hydrogen source reactor and PEMFC based on chemical absorption/desorption of solid hydrogen storage is established,and a simulation model of a PEMFC power system coupled with solid hydrogen storage is established using MATLAB/SIMULINK software,and the hydrogen supply of the reactor is analyzed in *** inﬂuence of prominent factors is *** research results show that the proposed method improved the system *** the same time,increasing the PEMFC temperature,increasing the area of the proton exchange membrane and the oxygen supply pressure can increase the output power of the power system.

关键词： Hydrogen energy fuel cell power system optimization electrical energy harvesting

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Enhanced spectrum sensing using a combination of energy detector,matched filter and cyclic prefix

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Digital Communications and Networks 2020年第4期6卷 534-541页

作者： ghassan Alnwaimi Hatem Boujemaa King Abdulaziz University Saudi Arabia COSIM Lab SUPCOMTunisia

In this paper,we propose a sensing scheme based on energy detection,matched filter and cyclic *** Equal Gain Combining(EGC)and optimal combination of the aforementioned detectors are investigated in cooperative and non-cooperative spectrum sensing *** packet transmission systems such as OFDM(Orthogonal Frequency Division Multiple access)systems,the proposed scheme takes advantage of utilizing more samples than individual detectors,i.e.,cyclic prefix,training or pilot samples,and data payload *** proposed combine-sensing scheme offers higher detection probability and lower false alarm probability,as compared with the performance of individual detectors over the same frame *** results are congruent with the theoretical curves and confirm the validity of our derivations.

关键词： Cooperative spectrum sensing Energy detector Matched filter Cyclic prefix CFAR CDR Cognitive radio networks False alarm probability Detection probability

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Transition of pediatric to adult care in inflammatory bowel disease: Is it as easy as 1, 2, 3?

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World Journal of Gastroenterology 2017年第20期23卷 3624-3631页

作者： Anita Afzali ghassan Wahbeh Division of Gastroenterology University of WashingtonHarborview Medical CenterSeattleWashington Division of Gastroenterology Seattle Children's HospitalUniversity of WashingtonSeattleWashington

Inflammatory bowel disease(IBD)is a heterogeneous group of chronic diseases with a rising prevalence in the pediatric population,and up to 25%of IBD patients are diagnosed before 18 years of *** with IBD tend to have more severe and extensive disease and eventually require graduation from pediatric care toadult *** transition of patients from pediatric to adult gastroenterologists requires careful preparation and coordination,with involvement of all key players to ensure proper collaboration of care and avoid interruption in *** can be challenging and associated with gaps in delivery of *** pediatric and adult health paradigms have inherent differences between health care models,as well as health care priorities in *** readiness of the young adult also influences this transition of care,with often times other overlaps in life events,such as school,financial independence and moving away from *** patients are therefore at higher risk for poorer clinical disease *** aim of this paper is to review concepts pertinent to transition of care of young adults with IBD to adult care,and provides resources appropriate for an IBD pediatric to adult transition of care model.

关键词： Inflammatory bowel disease Adolescents Young adults Transition care Transition to adult care

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Thermal Conductivity of Room Temperature Deep Eutectic Solvents

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Journal of Thermal Science 2021年第6期30卷 1960-1972页

作者： ALBAYATI Noor KADHOM Mohammed ABDULLAH ghassan SALIH Suhaib Department of Science College of Basic EducationUniversity of WasitWasit 52005Iraq Department of Environmental Science College of Energy and Environmental ScienceAl-Karkh University of ScienceBaghdad 31020Iraq Department of Chemical Engineering University of TikritSaladin 34001Iraq

As deep eutectic solvents(DESs)became a prevalent category of materials,reporting their physical and chemical properties turned to be *** this work,a database of the thermal conductivity of 39 DESs was experimentally investigated in a temperature range of 25℃to 60℃,since this property was not broadly reported *** the thermal conductivity is a significant approach to obtain the fluids'heat transfer coefficients,which are essential for fluid heat transfer applications and equipment *** selection of the reported DESs was based on their liquid phase status at room temperature and ***,the thermal conductivity was studied as a function of temperature and ***,the data were fit with the conventional equations to predict the thermal conductivity value at a certain *** highest R^(2) was selected to identify the best behavior with the common types of *** was found that the thermal conductivity reduced by raising the temperature,which was attributed to the enhancement that occurred in electrons'randomness and reduction in electrons'free ***,as the temperature rises up,the density decreases,and molecular distance *** contained choline chloride showed higher thermal conductivity stability than other *** an opposite scenario was noticed for glycerol and ethylene glycol DESs due to the possibility of generating water.

关键词： deep eutectic solvents thermal conductivity physical properties green solvents

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Utility of endoscopic ultrasound in patients with portal hypertension

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World Journal of Gastroenterology 2014年第39期20卷 14230-14236页

作者： ghassan M Hammoud Jamal A Ibdah Division of Gastroenterology and Hepatology University of Missouri School of Medicine Columbia MO 65212 United States

Endoscopic ultrasound(EUS) has revolutionized the diagnostic and therapeutic approach to patients with gastrointestinal disorders. Its application in patients with liver disease and portal hypertension is increasing. Patients with chronic liver disease are at risk for development of portal hypertension sequale such as ascites, spontaneous bacterial peritonitis and gastroesophageal varices. Bleeding esophageal and gastric varices are among the most common causes of mortality in patients with cirrhosis. Thus, early detection and treatment improve the outcome in this population. EUS can improve the detection and diagnosis of gastroesophageal varices and collateral veins and can provide endoscopic therapy of gastroesophageal varices such as EUS-guided sclerotherapy of esophageal collateral vessels and EUS-guided cynoacrylate(Glue) injection of gastric varices. EUS can also provide knowledge on the efficacy of pharmacotherapy of portal hypertension. Furthermore, EUS can provide assessment and prediction of variceal recurrence after endoscopic therapy and assessment of portal hemodynamics such as E-Flow and Doppler study of the azygous and portal veins. Moreover, EUS-guided fine needle aspiration may provide cytologic diagnosis of focal hepatic tumors andanalysis of free abdominal *** specialized EUSguided needle biopsy,a sample of liver tissue can be obtained to diagnose and evaluate for chronic liver ***-guided fine needle injection can be used to study portal vein pressure and hemodynamics,and potentially could be used to assist in exact measurement of portal vein pressure and placement of intrahepatic portosystemic shunt.

关键词： Endoscopic ultrasound Cirrhosis Portal hypertension Gastroesophageal varices Cyanoacrylate Hepatocellular carcinoma Fine needle aspiration

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Novel Non-Protein Biomarkers for Early Detection of Hepatocellular Carcinoma

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Engineering 2021年第10期7卷 1369-1374页

作者： ghassan K.Abou-Alfa Lin Wu Augusto Villanueva Memorial Sloan Kettering Cancer Center New York CityNY 10065USA Weill Medical College Cornell UniversityNew York CityNY 10065USA Berry Oncology Corporation Beijing 102200China Division of Liver Diseases Division of Hematology/Medical OncologyLiver Cancer ProgramDepartment of MedicineTisch Cancer InstituteIcahn School of Medicine at Mount SinaiNew York CityNY 10029USA

Early detection of hepatocellular carcinoma(HCC)while in its early stages is critical for reducing HCC mortality in high-risk ***,highly sensitive and specific surveillance biomarkers for early-stage HCC detection are still *** recent years,great efforts have been made to research tumor-derived molecular features that are detectable in circulation,such as circulating tumor deoxyribonucleic acid and circulating tumor ribonucleic acid,in order to explore their potential as noninvasive biomarker candidates in many tumor *** this review,we summarize current studies on these new approaches and their application in early HCC detection.

关键词： Hepatocellular carcinoma Early detection Biomarkers Liquid biopsy

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Virtual geographic environments in socio-environmental modeling:a fancy distraction or a key to communication?

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International Journal of Digital Earth 2018年第4期11卷 408-419页

作者： Alexey Voinov ArzuÇöltekin Min Chen ghassan Beydoun Faculty of Geoscience and Earth Observation(ITC) University of TwenteAE EnschedeThe Netherlands Department of Geography University of ZurichZurichSwitzerland Key Laboratory of Virtual Geographic Environment(Ministry of Education of PRC) Nanjing Normal UniversityNanjingPeople’s Republic of China Faculty of Engineering and IT University of Technology SydneyUltimoAustralia

Modeling and simulation are recognized as effective tools for management and decision support across various disciplines;however,poor communication of results to the end users is a major obstacle for properly using and understanding model *** can play an essential role in making modeling results accessible for management and *** reality(VR)and virtual geographic environments(VGEs)are popular and potentially very rewarding ways to visualize socio-environmental ***,there is a fundamental conflict between abstraction and realism:models are goal-driven,and created to simplify reality and to focus on certain crucial aspects of the system;VR,in the meanwhile,by definition,attempts to replicate reality as closely as *** elevated realism may add to the complexity curse in modeling,and the message might be diluted by too many(background)*** is also connected to information overload and cognitive ***,modeling is always associated with the treatment of uncertainty–something difficult to present in *** this paper,we examine the use of VR and,specifically,VGEs in socio-environmental modeling,and discuss how VGEs and simulation modeling can be married in a mutually beneficial way that makes VGEs more effective for users,while enhancing simulation models.

关键词： Complexity uncertainty virtual reality stakeholders cognition users

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Intra-and inter-specific scaling laws of plants and animals

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Acta Mechanica Sinica 2021年第2期37卷 321-330页

作者： Jiahang Li Hao Wu ghassan S。Kassab Wenchang Tan Yunlong Huo Department of Mechanics and Engineering Science College of EngineeringPeking UniversityBeijing 100871China PKU-HKUST Shenzhen-Hongkong Institution Shenzhen 518057China California Medical Innovations Institute San DiegoCA 92121USA Shenzhen Graduate School Peking UniversityShenzhen 518055China Institute of Mechanobiology&Medical Engineering School of Life Sciences&BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China

The allometric scaling laws of metabolism in 447 animal and 1200 plant species showed convex and concave curvatures between mass and metabolic rate,*** objective of the study is to explain the difference of curvatures between animals and plants based on fractal *** intraspecific scaling laws were derived from an asymmetric vascular tree with the fractal dimension(i.e.,a in k^(a)_(1)+k^(a)_(2)+…-=1,where k_(i)refers to the ratio of daughter to mother diameters).Based on the intraspecific scaling laws,the allometric scaling exponent of metabolism(i.e.,an interspecific scaling law)was shown to be equal to one-third of fractal ***,a novel piecewise-defined function in conjunction with the intraspecific scaling laws was proposed to explain the diverse metabolic scaling in animals and *** intraspecific and interspecific scaling laws showed good agreement with morphometric *** experimentally-validated scaling models predict the diversity of intraspecific and interspecific scaling seen in *** our knowledge,this is the first study to use fractal models to explain the convex and concave forms of metabolic scaling in animals and *** study resolves the long-term controversies to use the resource-transport network models for explanation of the allometric scaling law of metabolism.

关键词： Scaling laws Fractal models Asymmetric tree

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Usefulness of endoscopic ultrasound-guided fine needle aspiration in the diagnosis of hepatic, gallbladder and biliary tract Lesions

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World Journal of Gastrointestinal Oncology 2014年第11期6卷 420-429页

作者： ghassan M Hammoud Ashraf Almashhrawi Jamal A Ibdah Division of Gastroenterology and Hepatology University of Mis-souri Columbia MO 65212 United States

Endoscopic ultrasound(EUS)-guided fine needle aspira-tion(FNA) of the liver is a safe procedure in the diag-nosis and staging of hepatobiliary malignancies with a minimal major complication rate. EUS-FNA is useful for liver lesions poorly accessible to other imaging modali-ties of the liver. EUS-guided FNA of biliary neoplasia and malignant biliary stricture is superior to the con-ventional endoscopic brushing and biopsy.

关键词： Endoscopic ultrasound Fine needle aspira-tion Hepatocellular carcinoma Bile duct stricture Gall-bladder Cholangiocarcinoma Biliary drainage

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Endoscopic assessment and management of early esophageal adenocarcinoma

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World Journal of Gastrointestinal Oncology 2014年第8期6卷 275-288页

作者： ghassan M Hammoud Hazem Hammad Jamal A Ibdah Division of Gastroenterology and Hepatology University of Mis-souri Columbia MO 65212 United States

Esophageal carcinoma affects more than 450000people worldwide and the incidence is rapidly *** the United States and Europe,esophageal adenocarcinoma has superseded esophageal squamous cell carcinoma in its *** cancer has a high mortality rates secondary to the late presentation of most patients at advanced *** screening is recommended for patients with multiple risk factors for cancer in Barrett’s *** risk factors include chronic gastroesophageal reflux disease,hiatal hernia,advanced age,male sex,white race,cigarette smoking,and *** annual risk of esophageal cancer is approximately 0.25%for patients without dysplasia and 6%for patients with high-grade *** percent of all esophageal adenocarcinoma in the United States is early stage with disease confined to the mucosa or *** significant morbidity and mortality of esophagectomy make endoscopic treatment an attractive *** American Gastroenterological Association recommends endoscopic eradication therapy for patients with high-grade *** modalities for treatment of early esophageal adenocarcinoma include endoscopic resection techniques and endoscopic ablative techniques such as radiofrequency ablation,photodynamic therapy and *** therapy should be precluded to patients with no evidence of lymphovascular *** tumor recurrence is low after endoscopic therapy and is predicted by poor differentiation of tumor,positive lymph node and submucosal *** resection should be offered to patients with deep submucosal invasion.

关键词： Esophageal adenocarcinoma High grade dysplasia,endoscopic ultrasound Gastroesophageal reflux Barrett’s esophagus Chromoendoscopy Narrow band imaging Endoscopic mucosal resection Radiofrequency ablation

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