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Modeling of Biological Tissues Response to Radio Frequency （RF）： Towards Remote Sensing of Electrocardiography Signal

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Journal of Life Sciences 2013年第12期7卷 1305-1311页

作者： Fatimah Toameh Hicham Bizri Walid Hassan ali hage-diab Lina Mustapha Department of Biomedical Engineering Lebanese International University Moseitbeh Beirut Lebanon Department of Biomedical Physics Lebanese University Hadath Beirut Lebanon

Premature newborns are at high risk of developing infections, so they require continuous monitoring of vital parameters for long periods of time, until they approximately reach the pregnancy due date. ECG （electrocardiography） is one of the most widely used method for evaluating the structure-function relationship of the heart in health and in sickness. Due to incomplete skin development, premature newborns have some special requirements to the ECG monitoring electrodes. Contact ECG monitoring adversely affects the health and comfort of the newborns. The goal of this study is to determine the feasibility of using RF （radio frequency） in ECG signal remote sensing. This requires studying the interaction mechanisms between RF fields and biological tissues The ECG current propagated from the heart through the skin has an effect on the permittivity of the skin which is frequency dependent. Thus, the feasibility of detecting the change of the relative permittivity in the presence of ECG signal is also discussed. The RF biological tissues response is simulated using MATLAB software in preparation for experimental validation.

关键词： Noenatal monitoring radio frequency non-contact ECG measuement physiological signals dielectric properties.

Heavy Metals Content in Water and Sediments in the Upper Litani River Basin, Lebanon

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Journal of Geoscience and Environment Protection 2022年第7期10卷 139-158页

作者： Chaden Moussa Haydar Khaled Tarawneh Nada Nehme Mazen Amaireh ali Yaacoub Walaa diab Faculty of Tourism and Hospitality Islamic University of Lebanon Beirut Lebanon Mining and Mineral Department Faculty of Engineering Al Hussein Bin Talal University Ma’an Jordan Faculty of Agricultural Engineering and Veterinary Medicine Lebanese University Dekwaneh Beirut Lebanon Mining Department Faculty of Engineering Tafila Technical University Tafila Jordan Lebanese Cleaner Production Center IRI Building Lebanese University Campus Beirut Lebanon Faculty of Sciences Lebanese University Beirut Lebanon

Surface water quality is largely influenced by both natural processes and anthropogenic inputs. This study involves the characterization of the concentration of heavy metals of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn, and the sources of pollution in water and sediment of the Upper Litani River Basin (ULRB) in Lebanon. The investigation was performed during three seasons of rainy, mid-rainy spring and wet periods for two years during different flow rates. Sediments were characterized by a set of chemical analyses, cation exchange capacity (CEC), mineralogy of the sediments, X-ray diffraction (XRD), and Fourier transformed infrared spectroscopy (FTIR). To assess metal contamination in sediment, Consensus-Based Sediment Quality Guidelines of Wisconsin (CBSQG) were applied. The metals contamination in the sediments was also evaluated by contamination factor (Cf). The test results showed that the effect of seasonal variations was significant in the Upper Litani River Basin. Principal Compound Analysis (PCA) and Pearson’s correlation were also performed in this study to compare and determine the correlation between metals in water and sediments. The concentrations of Pb, Cd, Cu, Cr and Zn in all sediment samples are above the norms in winter, while Fe was increased in summer. The results showed that the importance of monitoring of changes of heavy metals values and physico-chemical characterization of different parameters could represent the possibility of a comprehensive assessment of negative pressures on the water and soil ecosystem of Litani River Basin during different seasons.

关键词： Stream Flow Heavy Metals Sediments Concentration Contamination Lebanon

Effect of silica fume on the behavior of lightweight reinforced concrete beams made from crushed clay bricks

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AI in Civil Engineering 2023年第1期2卷 77-92页

作者： Yahia M.S.ali Tarek Abdelaleem Hesham M.diab Mohamed M.M.Rashwan Department of Civil Engineering Faculty of EngineeringAssiut UniversityAssiut 71516Egypt International Institute for Urban Systems Engineering Southeast UniversityNanjing 210096China

Crushed over-burnt clay bricks(COBCBs)are a promising alternative to the natural gravel aggregate in lightweight concrete(LWC)production because of their high strength-to-weight ***,COBCBs are considered a green aggregate as they solve the problem of solid waste *** this paper,a total of fifteen reinforced concrete(RC)beams were constructed and tested up to *** experimental beams were classified into five *** con-trol beams were cast with normal weight concrete(NWC),while the remaining four groups of beams were prepared from *** test parameters were the concrete type,reinforcement ratio and silica fume(SF)*** behavior of beams was evaluated in terms of the crack pattern,failure mode,ultimate deflection,and *** experimen-tal results suggested that the weight and strength of the concrete prepared satisfied the requirements of *** addition,the increase in the reinforcement ratio and SF content improved the behavior of the *** is noteworthy that the SF addition caused measurable enhancements to the majority of the performance characteristics of LWC ***,COBCBs were successfully used as coarse aggregates in the production of high-quality *** ACI 318-19 and CSA-A23.3-19 made acceptable predictions of the cracking moment,ultimate capacity and mid-span deflection.

关键词： Recycling Lightweight concrete Crushed clay bricks Silica fume

Complication versus Radicality in Papillary Thyroid Cancer Surgery: How to Keep the Balance?

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Journal of Cancer Therapy 2019年第12期10卷 1013-1024页

作者： ali Zedan Badawy M. Ahmed Mohamed Ismail Omar Waleed Ahmed diab Hemat A. Mahmoud Haisam Atta Surgical Oncology Department South Egypt Cancer Institute Assuit University Assiut Egypt Nuclear Medicine Department South Egypt Cancer Institute Assuit University Assiut Egypt Diagnostic Radiology Department South Egypt Cancer Institute Assuit University Assiut Egypt

Background: Controversy exists over the extent of surgical treatment of papillary thyroid *** may carry a significant risk of surgical complications. The aim of this study is to investigate the complications following surgical treatment of thyroid cancer and the association between the?extent of surgery and complication rates. Methods: A total of 196 patients with papillary thyroid cancer were retrospectively reviewed to identify extent of surgery and associated complications, between 2009 and 2018 atSouth Egypt Cancer Institute Assiut University. Results: Primary procedures included less-than-total thyroidectomy (near total thyroidectomy in 5.1%, subtotal thyroidectomy in 4.1%, thyroid lobectomy in 3.1%) and total thyroidectomy in 87.8% (18.9% of them are completion thyroidectomy). No lymph nodes dissection was done in 10.7%, Berry picking in 6.1%, central compartment neck dissection in 41.8%, central compartment neck dissection with modified ipsilateral radical neck dissection in 12.2%, central compartment neck dissection with modified bilateral radical neck dissection in 26.0%, central compartment dissection with both modified bilateral radical neck dissection and superior mediastinal lymph node dissection 3.1%. The most common surgical complication were transient hypoparathyroidism (16.7% - 45.8%) and 2.0% permanent, transient vocal cord palsy (7.3% - 16.7%), and 3.9% permanent, hematoma 1.5%, seroma 7.1% and chyle fistula in 2.6% of patients. Conclusion: Thyroid cancer surgeries are safe. The transient complication rates of hypoparathyroidism increased significantly with increasing the extent of surgery.

关键词： Complications Thyroid Cancer Thyroidectomy Lymph Node Dissection

POTENTIAL OF Al2O3/GaN/SAPPHIRE LAYERED STRUCTURE FOR HIGH TEMPERATURE SAW SENSORS

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POTENTIAL OF Al2O3/GaN/SAPPHIRE LAYERED STRUCTURE FOR HIGH T...

Consensus statement on the epidemiology,diagnosis,prevention,and management of cow's milk protein allergy in the Middle East:a modified Delphi-based study

2015全国压电和声波理论及器件技术研讨会

作者： Sergei ZHGOON Ouarda LEGRANI OmarELMAZRIA Thierry AUBERT Meriem ELHOSNI Hamza MERSNI Laetitia LEFEVRE Sami hage-ali National Research University Moscow Power Engineering Institute Centrale Supélec LMOPS Université de Lorraine LMOPS Laboratoire SYMME Université Savoie Mont Blanc

This paper describes the investigation of the potential of packageless structures for acoustic wave sensor applications based on AlO/IDT/GaN/Sapphire *** finite elements modeling predicts the possibility of acoustically isolated waveguiding layer acoustic wave(WLAW)to propagate inside this structure with very low displacement at the top surface of the topmost AlO *** layer serves as a protecting layer against oxidation of internal layers as well as an acoustically isolating layer,providing a mean for packageless packaging of this *** modeling results get confirmation in experiments with the precursor IDT/GaN/Sapphire structure thus supporting hopes on the predicted correct operation of the final AlO/IDT/GaN/Sapphire structure.

关键词： Layered structure High temperature SAW Sensor

来源： cnki会议评论

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World Journal of Pediatrics 2021年第6期17卷 576-589页

作者： Moustafa A.El-Hodhod Mortada H.F.El-Shabrawi Ahmed AIBadi Ahmed Hussein AM Almehaidib Basil Nasrallah Ebtsam Mohammed AIBassam Hala El Feghali Hasan M.Isa Khaled Al Saraf Maroun Sokhn Mehdi Adeli Najwa Mohammed Mousa Al-Sawi Pierre hage Suleiman Al-Hammadi Department of Pediatrics Faculty of MedicineAin Shams UniversityCairoEgypt Faculty of Medicine October 6 UniversityGizaEgypt Faculty of Medicine Cairo UniversityCairoEgypt International Pediatric Association(IPA) MarengoUSA International Society of Tropical Pediatrics(ISTP) ManilaPhilippines DRC Hospital MuscatOman Al Amiri and Al Adan Hospitals KuwaitKuwait Pediatric Gastroenterology Department of PediatricsKing Faisal Specialist Hospital and Research Center RiyadhRiyadhSaudi Arabia American Hospital Dubai DubaiUnited Arab Emirates Nutrition Service Department King Faisal Specialist and Research Center RiyadhRiyadhSaudi Arabia CHU Notre Dame de Secours ByblosLebanon Pediatric Department Salmaniya Medical ComplexManamaBahrain Pediatric department Arabian Gulf UniversityManamaBahrain Pediatrics Department Dar Al Shifa HospitalKuwaitKuwait Pediatric Gastroenterology Hepatologyand Nutrition DepartmentSaint George University Medical CenterUniversity of BalamandBeirutLebanon Sidra Medicine DohaQatar Department of Pediatrics Doctor Sulaiman Alhabib Medical GroupAlrryan BranchRiyadhSaudi Arabia Pediatric Pulmonology and Allergology University of BalamandBeirutLebanon College of Medicine Mohanuned Bin Rashid University of Medicine and Health SciencesBuilding 14505055 DubaiUnited Arab Emirates

Background This study aimed to develop an expert consensus regarding the epidemiology,diagnosis,and management of cow’s milk protein allergy(CMPA)in the Middle *** A three-step modified Delphi method was utilized to develop the *** specialized pediatricians participated in the development of this *** statement was considered a consensus if it achieved an agreement level of>80%.Results The experts agreed that the double-blind placebo-controlled oral challenge test(OCT)should be performed for 2-A weeks using an amino acid formula(AAF)in formula-fed infants or children with suspected ***-fed infants with confirmed CMPA should be offered a therapeutic *** panel stated that an extensively hydrolyzed formula(eHF)is indicated in the absence of red flag *** the same time,the AAF is offered for infants with red flag signs,such as severe anaphylactic *** panel agreed that infants on an eHF with resolved symptoms within 2-4 weeks should continue the eHF with particular attention to the growth and nutritional *** the other hand,an AAF should be considered for infants with persistent symptoms;the AAF should be continued if the symptoms resolve within 2-4 weeks,with particular attention to the growth and nutritional *** cases with no symptomatic improvements after the introduction of an *** measures should be *** panel developed a management algorithm,which achieved an agreement level of 90.9%.Conclusion This consensus document combined the best available evidence and clinical experience to optimize the management of CMPA in the Middle East.

关键词： Consensus Cow's milk protein allergy Infant formula Middle East Milk hypersensitivity

Defect of insulin signal in peripheral tissues: important role of ceramide

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World Journal of diabetes 2014年第3期5卷 244-257页

作者： Rima hage Hassan Olivier Bourron Eric Hajduch INSERM UMR-S 1138Centre de Recherche des CordeliersF-75006 ParisFrance UniversitéPierre et Marie Curie-Paris 6 UMR-S 872F-75006 ParisFrance Université Paris Descartes UMR-S 872F-75006 ParisFrance Olivier BourronDepartment de Diabétologie et Maladies métaboliquesAP-HPHopital Pitié-SalpêtrièreF-75006 ParisFrance

In healthy people,balance between glucose production and its utilization is precisely *** circulating glucose reaches a critical threshold level,pancreaticβcells secrete insulin that has two major actions:to lower circulating glucose levels by facilitating its uptake mainly into skeletal muscle while inhibiting its production by the ***,dietary triglycerides are the main source of fatty acids to fulfill energy needs of oxidative ***,the unconsumed fraction of excess of fatty acids is stored in lipid droplets that are localized in adipocytes to provide energy during fasting ***,adipose tissue acts as a trap for fatty acid excess liberated from plasma *** the buffering action of adipose tissue to store fatty acids is impaired,fatty acids that build up in othertissues are metabolized as sphingolipid derivatives such as *** studies suggest that ceramides are among the most active lipid second messengers to inhibit the insulin signaling pathway and this review describes the major role played by ceramide accumulation in the development of insulin resistance of peripherals tissues through the targeting of specific proteins of the insulin signaling pathway.

关键词： diabetes Insulin resistance Lipids Insulin signaling Triglycerides Palmitate Sphingolipid Akt Ceramide synthase Protein phosphatase 2A Protein kinase C ζ/λ

Importance of the Glycated Hemoglobin Assay in Congolese Women with Polycystic Ovary Syndrome: A Case-Control Study in Kinshasa, DR Congo

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Open Journal of Obstetrics and Gynecology 2019年第11期9卷 1492-1509页

作者： Daddy Kabamba Numbi Dophie Tshibuela Beya Guelord Mukiapini Luzolo Passy Kimena Nyota Placide Cyanga Ngandu Mamy Ngole Zita Gustave Ilunga Ntita Donatien Kayembe Nzongola-Nkasu Jérémie Muwonga Masidi Mireille Nganga Nkanga Justin Mboloko Esimo Arsène Mputu Lobota Jean Bosco Kasiam Onkin Baudouin Buassa-bu-Tsumbu Cathy ali Risasi Fons Verdonck Bernard Spitz Jean Pierre Elongi Moyene Département de Biologie Médicale Service de Biologie Clinique Cliniques Universitaires de Kinshasa Kinshasa DR Congo Département de Gynécologie-Obstétrique Cliniques Universitaires de Kinshasa Kinshasa DR Congo Département de Médecine Interne Service d’Endocrinologie et Diabétologie Cliniques Universitaires de Kinshasa Kinshasa DR Congo Département de Biologie Clinique Hopital Général de Référence de Kinshasa Kinshasa DR Congo Department of Physiology KU Leuven Leuven Belgium Department of Gynecology-Obstetrics KU Leuven Leuven Belgium Département de Gynécologie-Obstétrique Hopital Général de Référence de Kinshasa Kinshasa DR Congo

Context: Polycystic ovary syndrome (PCOS) is considered a syndrome related to the metabolic syndrome with a high risk for developing diabetes mellitus. The evaluation of the glycated hemoglobin (HbA1c) seems to be an interesting tool to detect states of hyperglycemia that may be associated with this syndrome and to understand her pathophysiology. Aims: The purposes of this study are to determine the profile of HbA1c in Congolese women with PCOS, to determine the frequency of states of hyperglycemia and to assess the impact of this marker on clinical signs on this syndrome. Material and methods: This is a case-control study of 130 Congolese subfertile women;65 with a diagnosis of PCOS and 65 others without PCOS. This is conducted from June 2016 to June 2019 among Congolese women of childbearing age. All these women were recruited at the subfertility outpatient clinic of the University Hospital of UNIKIN as well of the YANGA medical centers in Kinshasa, Democratic Republic of Congo. Sickle cell disease was excluded as also the cases of anemia. HbA1c was assayed via the immunoturbidimetric method and the results interpreted according to the ADA recommendations with a pathological cut-off point ≥ 6.5%. Results: Mean hemoglobin was 11.6 ± 1.2 g/dl (11.5 ± 1.1 g/dl vs. 11.8 ± 1.4 g/dl, P = 0.568). The proportion of diabetics was 1.6% (1.6% vs. 1.5%, P = 0.74). Higher HbA1c values were noted in the PCOS group compared to the control group (7.3% ± 2.1% vs. 5.6% ± 0.6%, P 0.001). The multivariate analysis showed a strong correlation between elevated HbA1c levels and PCOS (OR 14.79 (CI 5.43 - 40.32), P 0.001). In the PCOS group, higher HbA1c values were significantly correlated with a higher socio-economic status (OR 3.38 (1.67 - 8.47), P = 0.018) and with obesity (OR 3.48 IC (1.31 - 7.13) P = 0.029). A perfect, positive and significant linear correlation was found between HbA1c and fasting blood glucose (r = 0.807). 60% of women in the PCOS group had pathological values of H

关键词： PCOS HbA1c Subfertility Congolese Women