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Knowledge, Attitudes and Practices of Persons infected with the Hepatitis B Virus on Their Own Disease

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Open Journal of Gastroenterology 2022年第4期12卷 119-127页

作者： Arnaud Mongo-Onkouo Ngala Akoa itoua-Ngaporo clausi.a phi.esti.e ahoui.apendi.ji.e florent mi.i.sse Monamou Rody Ngami Marlyse Ngalessami Mouakosso Mardoché Motoula Latou Deby Gassaye Blaise irénée Atipo ibara Jean-Rosaire ibara Department of Hepatogastroenterology and internal Medicine Brazzaville Hospital and Universitary Center Brazzaville Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville Congo

introduction: Viral hepatitis B is a communicable disease that is preventable by vaccination. Knowledge of transmission routes and prevention methods could play a key role in limiting and reducing the spread of the disease. Aim: This was a prospective study that was carried out from July 1 to September 30, 2018 in the department of gastroenterology and internal medicine in people carrying the hepatitis B virus. All patients were asked about their knowledge, attitudes and practices regarding viral hepatitis B. Materials and Methods: This was a cross-sectional study, collecting prospective data, which was carried out from July 1 to September 30, 2018 in the gastroenterology department of CHUB (University Hospital of Brazzaville). eligible for the study were all patients who consulted or were followed in the ward for HBV infection during the study period. All patients were asked about their knowledge, attitudes and practices regarding viral hepatitis B. After obtaining informed consent, we asked patients about knowledge, attitudes and practices towards the hepatitis B virus. The data was collected on a pre-established survey sheet respecting anonymity and confidentiality. CSPro 7 software and SPSS 17 software were used for data entry and analysis. Chi-square was used to compare the percentages. These were expressed with their 95% confidence intervals [95% Ci]. A value of p 0.005 was considered significant. Results: Forty-two patients were included in the study, these were 66.7% (n = 28) men and 33.3% (n = 14) women. The average age was 38.76 ± 10.9 years. 45.2% of them (n = 19) were single and 59.5% (n = 25) had the next highest level of education. Thirty-nine patients had no knowledge of the source of their contamination;the sexual route was the most cited (61.9%). Alcohol consumption was rated badly by 38 patients (90.5%);of these 22 (52.4%) thought it worsened the disease. Lack of knowledge of an HBV carrier in the family was noted in 33 (78.6%) patients;20 (47.6%)

关键词： Viral Hepatitis B Knowledge Attitudes Practices Carriers Brazzaville

A super wear-resistant coating for Mg alloys achieved by plasma electrolytic oxidation and discontinuous deposition

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Journal of Magnesium and Alloys 2023年第8期11卷 2939-2952页

作者： Xixi Dong mingxu Xia Feng Wang Hailin Yang Gang ji e.A.Nyberg Shouxun ji College of Mechanical and electrical engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Brunel Centre for Advanced Solidification Technology(BCAST) Brunel University LondonUxbridge UB83PHUK School of Materials Science and engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Metallurgy and Materials University of BirminghamBirmingham B152TTUK State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Univ.Lille CNRSINRAECentrale LilleUMR 8207-UMET-UnitéMatériaux et TransformationsF-59000 LilleFrance Kaiser Aluminum Spokane ValleyWA 99216USA

Magnesium alloys are lightweight materials with great potential,and plasma electrolytic oxidation(PeO)is effective surface treatment for necessary improvement of corrosion resistance of magnesium ***,the∼14µm thick and rough PeO protection layer has inferior wear resistance,which limits magnesium alloys as sliding or reciprocating parts,where magnesium alloys have special advantages by their inherent damping and denoising properties and attractive *** a novel super wear-resistant coating for magnesium alloys was achieved,via the discontinuous sealing(DCS)of a 1.3µm thick polytetrafluoroethylene(PTFe)polymer layer with an initial area fraction(A_(f))of 70%on the necessary PeO protection layer by selective spraying,and the wear resistance was exceptionally enhanced by∼5500 times in comparison with the base PeO *** initial surface roughness(Sa)under PeO+DCS(1.54µm)was imperfectly 59%higher than that under PeO and conventional continuous sealing(CS).interestingly,DCS was surprisingly 20 times superior for enhancing wear resistance in contrast to *** induced nano-cracks that splitted DCS layer into multilayer nano-blocks,and DCS also provided extra space for the movement of nano-blocks,which resulted in rolling friction and nano ***,DCS promoted mixed wear of the PTFe polymer layer and the PeO coating,and the PTFe layer(HV:6 Kg·mm^(−2),A_(f):92.2%)and the PeO coating(HV:310 Kg·mm^(−2),A_(f):7.8%)served as the soft matrix and the hard point,***,the dynamic decrease of Sa by 29%during wear also contributed to the super wear *** strategy of depositing a low-frictional discontinuous layer on a rough and hard layer or matrix also opens a window for achieving super wear-resistant coatings in other materials.

关键词： Magnesium alloy Coating Plasma electrolytic oxidation Discontinuous deposition Wear resistance Mechanism

Study on the packed volume and the void ratio of idealized human red blood cells using a ?nite-discrete element method

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Applied Mathematics and Mechanics(english edition) 2019年第5期40卷 737-750页

作者： Dong XU Chunning ji A.MUNjiZA e.KALiViOTiS e.AViTAL J.WiLLAMS State Key Laboratory of Hydraulic engineering Simulation and Safety Tianjin University School of engineering & Material Science Queen Mary University of London Faculty of engineering and Technology Cyprus University of Technology

Numerical simulations are performed to examine the packing behavior of human red blood cells(RBCs). A combined ?nite-discrete element method(FDeM) is utilized, in which the RBCs are modeled as no-friction and no-adhesion solid bodies. The packed volume and the void ratio of a large number of randomly packed RBCs are clari?ed,and the effects of the RBC shape, the mesh size, the cell number, and the container size are investigated. The results show that the packed human RBCs with normal shape have a void ratio of 28.45%, which is slightly higher than that of the ?at or thick cells used in this study. Such information is bene?cial to the further understanding on the geometric features of human RBCs and the research on RBC simulations.

关键词： red blood cell (RBC) void ratio packed volume discrete element method

Fabrication of Macroporous Protein-containing Films through the Reverse emulsions Approach Featuringβ-Cyclodextrin-conjugated PeG-PLGA Copolymers

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Chinese Journal of Polymer Science 2016年第6期34卷 730-738页

作者： ji-jie wen 吕宏光 de-e liu 高辉 School of Chemistry and Chemical engineering Tianjin Key Laboratory of Organic Solar Cells and Photochemical ConversionTianjin University of TechnologyTianjin 300384China

A series of β-cyclodextrin-conjugated 4-arm poly（ethylene glycol）-poly（lactide-co-glycolide）（4-arm PeG-PLGA） copolymers were synthesized by a ring-opening polymerization of D,L-lactide and glycolide using 4-arm PeG as initiator, and then conjugated with mono（6-ethylenediamine-6-deoxy）- β-cyclodextrin （CDen） or ethylenediamino-bridged bis- β-CD （BCDen）. The chemical structures of copolymers were confirmed by iH-NMR and FTiR spectroscopy. The , β-CD-conjugated PeG-PLGA formed stable reverse micelles due to the formation of fl-CD and bovine serum albumin （BSA） inclusion complexation, which could accommodate BSA in the organic solvent with improved encapsulation efficiency. Moreover, we demonstrated a one-step approach to construct macroporous protein-containing films using these reverse micelles. The films with ordered pore arrays were directly prepared from reverse micelles. interestingly, the protein was totally located in the whole matrix except for the pores.

关键词： β-Cyclodextrin Copolymer Reverse micelles Ordered porous structures Proteins.

An integrated portable bio-monitoring system based on tough hydrogels for comprehensive detection of physiological activities

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Nano Research 2024年第1期17卷 321-332页

作者： Congcong Yang Chenchen ji Fengjiao Guo Chunjiang jin Hongyu mi Zhongchang Wang State Key Laboratory of Chemistry and Utilization of Carbon Based energy Resources School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830017China international iberian Nanotechnology Laboratory(iNL) Avenide Mestre Jose VeigaBraga 4715-330Portugal

Advanced soft ion-conducting hydrogels have been developed rapidly in the integrated portable health monitoring equipment due to their higher sensitivity,sensory traits,tunable conductivity,and stretchability for physiological activities and personal healthcare ***,traditional hydrogel conductors are normally susceptible to large deformation and strong mechanical stress,which leads to inferior electro-mechanical stability for real application ***,a strong ionically conductive hydrogel(poly(vinyl alcohol)-boric acid-glycerol/sodium alginate-calcium chloride/electrolyte ions(PBG/SC/ei))was designed by engineering the covalently and ionically crosslinked networks followed by the salting-out effect to further enhance the mechanical strength and ionic conductivity of the *** to the collective effects of the energy-dissipation mechanism and salting-out effect,the designed PBG/SC/ei with excellent structural integrity and robustness exhibits exceptional mechanical properties(elongation at break for 559.1%and tensile strength of 869.4 kPa)and high ionic conductivity(1.618 S·m^(-1)).As such,the PBG/SC/ei strain sensor features high sensitivity(gauge factor=2.29),which can effectively monitor various kinds of human motions(joint motions,facial micro-expression,faint respiration,and voice recognition).Meanwhile,the hydrogel-based Zn||MnO_(2)battery delivers a high capacity of 267.2 mAh·g^(-1)and a maximal energy density of 356.8 Wh·kg^(-1)associated with good cycle performance of 71.8%capacity retention after 8000 ***,an integrated bio-monitoring system with the sensor and Zn||MnO_(2)battery can accurately identify diverse physiological activities in a real-time and non-invasive *** work presents a feasible strategy for designing high-performance conductive hydrogels for highly-reliable integrated bio-monitoring systems with excellent practicability.

关键词： ionically conductive hydrogel strain sensor Zn-based battery integrated bio-monitoring system human motion monitoring

Coordinated Control Architecture for Motion Management in ADAS Systems

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ieee/CAA Journal of Automatica Sinica 2018年第2期5卷 432-444页

作者： Tzu-Chi Lin Siyuan ji Charles e. Dickerson David Battersby the wolfson school of mechanical electrical and manufacturing engineeringloughborough universityLoughhoroughLE11 3TUUK jaguar land rover GaydonCV35 0RRUK ieee

Advanced driver assistance systems(ADAS) seek to provide drivers and passengers of automotive vehicles increased safety and comfort. Original equipment manufacturers are integrating and developing systems for distance keeping, lane keeping and changing and other functionalities. The modern automobile is a complex system of systems. How the functionalities of advanced driver assistance are implemented and coordinated across the systems of the vehicle is generally not made available to the wider research community by the developers and manufactures. This paper seeks to begin filling this gap by assembling open source physics models of the vehicle dynamics and ADAS command models. Additionally, in order to facilitate ADAS development and testing without having access to the details of ADAS, a coordinated control architecture for motion management is also proposed for distributing ADAS motion control commands over vehicle systems. The architecture is demonstrated in a case study where motion is coordinated between the steering and the braking systems, which are typically used only for a single functionality. The integrated vehicle and system dynamics using the coordinated control architecture are simulated for various driving tasks. it is seen that improved trajectory following can be achieved by the proposed coordinated control architecture. The models, simulations and control architecture are made available for open access.

关键词： index Terms-Coordinated system feed-forward and feedbackcontrol integration control modeling and simulation tire mod-eling vehicle modeling vehicle dynamics control.

Cavitation research with computational fluid dynamics:From euler-euler to euler-Lagrange approach

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Journal of Hydrodynamics 2024年第1期36卷 1-23页

作者： Bin ji Zi-yang Wang Huai-yu Cheng Rickard e.Bensow State Key Laboratory of Water Resources engineering and Management Wuhan UniversityWuhan430072China Department of Mechanics and Maritime Sciences Chalmers University of TechnologyGothenburgSweden

Unsteady cavitating flow often contains vapor structures with a wide range of different length scales,from micro-bubbles to large cavities,which issues a big challenge to precisely investigate its evolution mechanism by computational fluid dynamics(CFD)*** present work reviews the development of simulation methods for cavitation,especially the emerging euler-Lagrange ***,the progress of the numerical investigation of hot and vital issues is discussed,including cavitation inception,cloud cavitation inner structure and its formation mechanism,cavitation erosion,and cavitation *** is indicated that the euler-Lagrange method can determine cavitation inception point *** cloud cavitation,the euler-Lagrange method can reveal the source of microbubbles and their distribution law inside the shedding *** method also has advantages and great potential in assessing cloud cavitation-induced erosion and *** the ever-growing demands of cavitation simulation accuracy in basic research and engineering applications,how to improve the euler-Lagrange method’s stability and applicability is still an open *** further promote the application of this advanced CFD simulation technology in cavitation research,some key issues are to be solved and feasible suggestions are put forward for further work.

关键词： numerical simulation euler-euler method euler-Lagrange method bubble dynamicsgy,Gothenburg,Sweden

Stability analysis of the sliding process of the west slope in Buzhaoba Open-Pit mine

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international Journal of mining Science and Technology 2016年第5期26卷 869-875页

作者： Ning Fang ji Changsheng Garmondyu e.Crusoe Jr. School of Art and Design School of Mines China University of Mining & Technology

To study the stability of the west slope in Buzhaoba Open-Pit mine and determine the aging stability coefficient during slide mass development, the deformation band of the west slope and the slide mass structure of the 34,600 profile are obtained on the basis of hydrology, geology, and monitoring *** residual thrust method is utilized to calculate the stability coefficients, which are 1.225 and 1.00 under sound and transfixion conditions, respectively. According to the rock damage and fragmentation and the principle of mechanical parameter degradation, the mechanical models of the slide mass development of the hard and soft rock slopes are established. An integrated model for calculating the slope stability coefficient is built considering water, vibration, and other external factors that pertain to the structural plane damage mechanism and the generating mechanism of the sliding mass. The change curve of the stability coefficient in the slide mass development is obtained from the relevant analyses,and afterwards, the stability control measures are proposed. The analysis results indicate that in the cracking stage of the hard rock, the slope stability coefficient decreases linearly with the increase in the length Lbof the hard rock crack zone. The linear slope is positively correlated to rock cohesion c. in the transfixion stage of the soft rock, the decrease speed of the stability coefficient is positively correlated to the residual strength of the soft rock. When the slope is stable, the stability coefficient is in a quadratic-linear relationship with the decreased height Dh of the side slope and in a linear relationship with anchoring force P.

关键词： Open-pit mine Side slope Sliding process Aging stability Crack zone

Helicobacter Pylori infection in Brazzaville: Comparative Study of Two identification Tests

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Open Journal of Gastroenterology 2019年第11期9卷 223-227页

作者： Ngala Akoa itoua-Ngaporo Lucie C. A. i. O. ikobo Arnaud Mongo-Onkouo jile florent mi.i.sse Monamou clausi.a phi.esti.e ahoui apendi Rody Stéphane Ngami Marlyse Ngalessami Mouakosso Deby Gassaye Blaise irenée Atipo ibara Jean-Rosaire ibara Department of Hepatogastroenterology and internal Medicine of Brazzaville University Hospital Center Brazzaville Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville Congo Department of infant Pediatrics of Brazzaville University Hospital Center Brazzaville Congo

Objective: To determine the place of two identification tests for Helicobacter pylori infection available in Congo. Materials and Methods: This was a comparative study carried out in two digestive endoscopy centers in Brazzaville from 1 January to 31 May 2018. Symptomatic patients referred for upper gastrointestinal endoscopy were included systematically. The frequency of infection was determined from two identification tests, namely the rapid urease test in gastric biopsies and the detection of antigen (Ag) for the germ in the stool. The criterion for judging the presence of the germ in each patient was the positivity of at least one of the two tests. The McNeMAR X2 test (p ed for the comparison of averages. Results: During the study period, 137 consenting patients were included, including 62 men and 75 women. The overall incidence of Helicobacter pylori (Hp) infection was 79.6% (109/28). Of the 137 patients, 18 were urease positive only;6 were looking for Hp Ag in the stool, and 85 were in the two tests. The frequency of infection was 75.2% (103/137) with the rapid urease test and 66.4% (91/137) with the Hp Ag test in stool. The rapid urease test proved more reliable in the diagnosis of Helicobacter pylori infection than the stool antigen test.

关键词： Helicobacter Pylori identification Tests Brazzaville