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Gastric leaks post sleeve gastrectomy:Review of its prevention and management

World Journal of Gastroenterology 2014年第38期20卷 13904-13910页

作者： Antoine Abou Rached Melkart Basile hicham el masri Department of Internal Medicine Gastroenterology DivisionLebanese University Department of General Surgery Lebanese University

Gastric sleeve gastrectomy has become a frequent bariatric procedure. Its apparent simplicity hides a number of serious,sometimes fatal,complications. This is more important in the absence of an internationally adopted algorithm for the management of the leaks complicating this operation. The debates exist even regarding the definition of a leak,with several classification systems that can be used to predict the cause of the leak,and also to determine the treatment plan. Causes of leak are classified as mechanical,technical and ischemic causes. After defining the possible causes,authors went into suggesting a number of preventive measures to decrease the leak rate,including gentle handling of tissues,staple line reinforcement,larger bougie size and routine use of methylene blue test per operatively. In our review,we noticed that the most important clinical sign or symptom in patients with gastric leaks are fever and tachycardia,which mandate the use of an abdominal computed tomography,associated with an upper gastrointrstinal series and/or gastroscopy if no leak was detected. After diagnosis,the management of leak depends mainly on the clinical condition of the patient and the onset time of leak. It varies between prompt surgical intervention in unstable patients and conservative management in stable ones in whom leaks present lately. The management options include also endoscopic interventions with closure techniques or more commonly exclusion techniques with an endoprosthesis. The aim of this review was to highlight the causes and thus the prevention modalities and find a standardized algorithm to deal with gastric leaks post sleeve gastrectomy.

关键词： Gastrectomy Bariatric surgery Obesity Anastomotic leak Gastric fistula Algorithms Laparoscopy

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Performance Evaluation of an Evaporative Cooling Pad for Humidification-Dehumidification Desalination

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Fluid Dynamics & Materials Processing 2024年第10期20卷 2323-2335页

作者： Ibtissam el Aouni hicham Labrim elhoussaine Ouabida Ahmed Ait Errouhi Rachid el Bouayadi Driss Zejli Aouatif Saad Advanced Systems Engineering Laboratory National School of Applied SciencesIbn Tofail UniversityKenitra14000Morocco

The perfect combination of renewable energy and desalination technologies is the key to meeting water demands in a cost-effective,efficient and environmentally friendly *** desalination technique by humidificationdehumidification is non-conventional approach suitable for areas with low infrastructure(such as rural and decentralized regions)since it does not require permanent *** this study,this technology is implemented by using solar energy as a source of thermal power.A seawater desalination unit is considered,which consists of a chamber with two evaporators(humidifiers),a wetted porous material made of a corrugated cellulose cardboard and a condenser(dehumidifier).The evaporation system is tested with dry bulb temperature and relative air humidity *** results of numerical simulations indicate that higher inlet air velocities(from 0.75 to 3 m/s)lead to a decrease in theΔT,ΔRH,and *** the air remaining within the evaporator for 30 cm,the temperature differential increases to 5.7°C,accompanied by a 39%rise in relative humidity *** changes result in a significant enhancement in humidification efficiency,achieving a remarkable efficiency level of 78%.However,a wettability value of 630 m^(2)/m^(3)leads to a smaller reduction of these *** the pad thickness,particularly to 0.3 m,improves performance by boostingΔT,ΔRH,and effectiveness,especially for pads with a wettability of 630 m^(2)/m^(3),for which superior performances are predicted by the numerical tests.

关键词： Desalination humidification dehumidification porous material solar energy evaporator

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An Efficient Hybrid Model for Arabic Text Recognition

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Computers, Materials & Continua 2023年第2期74卷 2871-2888页

作者： hicham Lamtougui hicham el Moubtahij Hassan Fouadi Khalid Satori LIIAN Laboratory Faculty of Sciences Dhar-MahrazFez30000Morocco Modeling Systems and Technologies of Information TeamUniversity of Ibn ZohrAgadir

In recent years,Deep Learning models have become indispensable in several fields such as computer vision,automatic object recognition,and automatic natural language *** implementation of a robust and efficient handwritten text recognition system remains a challenge for the research community in this field,especially for the Arabic language,which,compared to other languages,has a dearth of published *** this work,we presented an efficient and new system for offline Arabic handwritten text *** new approach is based on the combination of a Convolutional Neural Network(CNN)and a Bidirectional Long-Term Memory(BLSTM)followed by a Connectionist Temporal Classification layer(CTC).Moreover,during the training phase of the model,we introduce an algorithm of data augmentation to increase the quality of *** proposed approach can recognize Arabic handwritten texts without the need to segment the characters,thus overcoming several problems related to this *** train and test(evaluate)our approach,we used two Arabic handwritten text recognition databases,which are IFN/ENIT and *** Experimental results show that our new approach,compared to other methods in the literature,gives better results.

关键词： Deep learning arabic handwritten text recognition convolutional neural network(CNN) bidirectional long-term memory(BLSTM) connectionist temporal classification(CTC)

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Selenium containing macrocycles:transformation between Se-N/Se-S/Se-Se bonds

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Science China Chemistry 2017年第9期60卷 1191-1196页

作者： Shaobo Ji hicham el Mard Mario Smet Wim Dehaen Huaping Xu Key Laboratory of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China Department of Chemistry University of LeuvenCelestijnenlaan 20OFB-3001 Heveriee(Leuven)Belgium

Macrocycles possess potential applications in supramolecular chemistry and biosystems. Thus development of new kinds of macrocycles is of significance. Herein, novel macrocycles containing Se-Se/Se-S bonds were synthesized via transformation between selenium related dynamic covalent bonds. A monomer containing two ebselen moieties was synthesized (M1). The Se-N bonds in M1 were reduced by dithiothreitol, forming Se-S linked dimer (D1). To realize the transformation from Se-S bonds to Se-Se bonds, guest molecules were added as template, triggering the formation of Se-Se linked dimer (D2). The formation of these two new kinds of macrocycles was determined by H-1 NMR and Se-77 NMR, and the necessity of guest molecules was also confirmed. The introduction of ebselen moieties and Se-S bonds or Se-Se bonds into macrocycles may endow it with new responsiveness and bioactivities, as well as new types of host-guest chemistry.

关键词： macrocycles, selenium, dynamic covalent bonds

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Comparative study on yields and quality parameters of argan oils extracted by conventional and green extraction techniques

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Grain & Oil Science and Technology 2021年第3期4卷 125-130页

作者： hicham Mechqoq Mohamed el Yaagoubi Svetlana Momchilova Fouad Msanda Noureddine el Aouad Department of Biology Faculty of SciencesIbn Zohr UniversityAgadir 80000Morocco Institute of Organic Chemistry with Centre of Phytochemistry Bulgarian Academy of SciencesSofia 1113Bulgaria Polydisciplinary Faculty of Larache University Abdelmalek EssaadiTetouanLarache 92000Morocco

Argan oil is most frequently sold as pure oil,which can be directly applied topically due to its cosmetological proprieties or ingested in order to provide several health ***'s also commonly mixed into a number of cosmetic products like shampoos,soaps and *** this study we aimed to improve the argan oil extraction yield and quality parameters by comparing the effects of different extraction *** kernel oils were extracted using four methods:mechanical cold press,Soxhlet extraction with n-hexane,supercritical fluid extraction(SFE),and enzyme assisted extraction with three different enzyme solutions cellulase(cellulast),pectinase(Pectinex)and a mixture of carbohydrase enzymes(Viscozyme®).The quality parameters was evaluated by determining the acid,peroxide and iodine values aswell as the extinction coefficients K_(232) and K_(270) as measures of conjugated dienes and trienes,*** results showed that the highest yield(66.37%±3.3%)was obtained by enzyme assisted extraction using the carbohydrases enzymes mixture(Viscozyme®),followed by Soxhlet extraction(59.5%±3.1%)and pectinase extraction(52.03%±3.55%).All argan oils samples obtained by the different methods showed a good oxidation stability,with acid,peroxide and iodine values lower than 0.8 mg/g,15 meq/kg and 110 g/100 g according to the official argan oil norm,*** results of argan oils quality parameters demonstrated that the enzyme extracted argan oils showed low oxidation,with the following quality parameters:acid values(0.4-0.6 mg/g),iodine values(95-100 g/100 g),dienes(K_(232)eld without affecting the oil *** enzyme extraction method may be a great alternative to solvent and cold press extractions for this eco-friendly processing approach.

关键词： Argan oil Cold press Soxhlet extraction Supercritical fluid extraction Enzyme assisted extraction

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Rotation Scaling and Translation Invariants of 3D Radial Shifted Legendre Moments

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International Journal of Automation and computing 2018年第2期15卷 169-180页

作者： Mostafa el Mallahi Jaouad E1Mekkaoui Areal Zouhri hicham Amakdouf Hassan Qjidaa Faculty of Sciences Sidi Mohamed Ben Abdellah University Fez Morocco Department of Mathematics and Computer Science Polydisciplinary Faculty Sultan Moulay Slimane University Beni Mellal Morocco

This paper proposes a new set of 3D rotation scaling and translation invariants of 3D radially shifted Legendre moments. We aim to develop two kinds of transformed shifted Legendre moments： a 3D substituted radial shifted Legendre moments （3DSRSLMs） and a 3D weighted radial one （3DWRSLMs）. Both are centered on two types of polynomials. In the first case, a new 3D ra- dial complex moment is proposed. In the second case, new 3D substituted/weighted radial shifted Legendremoments （3DSRSLMs/3DWRSLMs） are introduced using a spherical representation of volumetric image. 3D invariants as derived from the sug- gested 3D radial shifted Legendre moments will appear in the third case. To confirm the proposed approach, we have resolved three is- sues. To confirm the proposed approach, we have resolved three issues： rotation, scaling and translation invariants. The result of experi- ments shows that the 3DSRSLMs and 3DWRSLMs have done better than the 3D radial complex moments with and without noise. Sim- ultaneously, the reconstruction converges rapidly to the original image using 3D radial 3DSRSLMs and 3DWRSLMs, and the test of 3D images are clearly recognized from a set of images that are available in Princeton shape benchmark （PSB） database for 3D image.

关键词： 3D radial complex moments 3D radial shifted Legendre radial moments radial shifted Legendre polynomials 3D imagereconstruction 3D rotation scaling translation invariants 3D image recognition computational complexities.

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Influence of the Inclination Angle on Mixed Convection and Heat Transfer in a“T”Shaped Double Enclosure

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1753-1774页

作者： M’Barka Mourabit Meryam Meknassi Soukaina Fekkar Soumia Mordane hicham Rouijaa el Alami Semma Polymer Physics and Critical Phenomena Laboratory Department of PhysicsFaculty of Sciences of Ben M’SikHassanⅡUniversityCasablancaMorocco Laboratory of Control and Mechanical Characterization of Materials and Structures National Higher School of Electricity and MechanicsHassanⅡUniversityCasablancaMorocco Laboratory of electrical Systems and Telecommunications Department of Applied PhysicsFSTHassan 1^(st)UniversitySettatMorocco Laboratory of Engineering Industrial Management and Innovation FSTHassan 1^(st)UniversitySettatMorocco

The effect of the tilt angle on mixed convection and related heat transfer in a“T”shaped double enclosure with four heated obstacles on the bottom surface is numerically *** considered obstacles are constantly kept at a relatively high(fixed)temperature,while the cavity’s upper wall is *** finite volume approach is used to solve the mass,momentum,and energy equations with the SIMPLEC algorithm being exploited to deal with the pressure-velocity *** is put on the influence of the tilt angle on the solution symmetry,flow structure,and heat exchange through the *** following parameters and related ranges are considered:Rayleigh number 104≤Ra≤5.105,tilt angle 0°≤φ≤90°,Reynolds number 100≤Re≤1000,Prandtl number Pr=0.72,block height B=0.5,opening width C=0.15,and distance between blocks D=*** results reveal different branches of solutions on varying Re andφ.They also show that the symmetry of the solution regarding the P_(2)axis is retained for all cases with no tilt and for values of Re between 100 and 1000.

关键词： Mixed convection heat transfer inclination angle “T”shaped double cavity

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Aiming High A Chinese enterprise is participating in the construction of the largest skyscraper in Africa

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ChinAfrica 2021年第7期13卷 36-37页

作者： hicham el Azami 不详

Anyone visiting Rabat,capital of Morocco and a city with rich historical heritage,is struck by the majesty of the Hassan *** vestige dating from the Almohad Dynasty(12th century)consists of a minaret and a large prayer area with *** a height of 44 meters,today,this skyscraper of the Middle Ages is a testimony to the influence of Rabat and its past domination over a territory ranging from Spain to Tunisia.

关键词： struc dating Middle

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Vaccine Roll Out

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ChinAfrica 2021年第3期13卷 34-35页

作者： hicham el Azami 不详

The large-scale vaccination campaign against COVID-19 in Morocco relies heavily on Chinese vaccine On August 20,2020,Moroccan citizens awoke to the news that their Ministry of Health and the Chinese laboratory Sinopharm's subsidiary China National Biotech Group had signed a memorandum of understanding for clinical trials of its anti-COVID vaccine on *** agreement also grants the country privileged access to the vaccine after the successful completion of *** development offered the first glimmer of hope for a way out of the crisis in a country that has been severely hit by the pandemic,which has claimed more than 8,000 lives,while its GDP shrank by 6.6 percent.

关键词： subsidiary claimed campaign

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Efficient Classification of Remote Sensing Images Using Two Convolution Channels and SVM

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Computers, Materials & Continua 2022年第7期72卷 739-753页

作者： Khalid A.AlAfandy hicham Omara Hala S.el-Sayed Mohammed Baz Mohamed Lazaar Osama S.Faragallah Mohammed Al Achhab ENSA Abdelmalek Essaadi UniversityTetouan 93002Morocco FS Abdelmalek Essaadi UniversityTetouan 93002Morocco Department of electrical Engineering Faculty of EngineeringMenoufia UniversityShebin El-Kom 32511Egypt Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia ENSIAS Mohammed V University in Rabat 10000Morocco Department of Information Technology College of Computers and Information TechnologyTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

Remote sensing image processing engaged researchers’attentiveness in recent years,especially *** main problem in classification is the ratio of the correct predictions after *** extraction is the foremost important step to build high-performance image *** convolution neural networks can extract images’features that significantly improve the image classifiers’*** paper proposes two efficient approaches for remote sensing images classification that utilizes the concatenation of two convolution channels’outputs as a features extraction using two classic convolution models;these convolution models are the ResNet 50 and the DenseNet *** elicited features have been used by the fully connected neural network classifier and support vector machine classifier as input *** results of the proposed methods are compared with other antecedent approaches in the same experimental *** is based on learning curves plotted during the training of the proposed classifier that is based on a fully connected neural network and measuring the overall accuracy for the both proposed *** proposed classifiers are used with their trained weights to predict a big remote sensing scene’s classes for a developed *** results ensure that,compared with the other traditional classifiers,the proposed classifiers are further accurate.

关键词： Remote sensing images deep learning ResNet DenseNet SVM

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