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Numerical modeling of cracking pattern's influence on the dynamic response of thickened tailings disposals: a periodic approach

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Earthquake Engineering and Engineering Vibration 2018年第1期17卷 179-190页

作者： gabriel Ferrer Esteban Sáez Christian Ledezma School of Engineering Pontificia Universidad Católica de Chile National Research Center for Integrated Natural Disaster Management

Copper production is an essential component of the Chilean economy. During the extraction process of copper, large quantities of waste materials（tailings） are produced, which are typically stored in large tailing ponds. Thickened Tailings Disposal（TTD） is an alternative to conventional tailings ponds. In TTD, a considerable amount of water is extracted from the tailings before their deposition. Once a thickened tailings layer is deposited, it loses water and it shrinks, forming a relatively regular structure of tailings blocks with vertical cracks in between, which are then filled up with ＂fresh＂ tailings once the new upper layer is deposited. The dynamic response of a representative column of this complex structure made out of tailings blocks with softer material in between was analyzed using a periodic half-space finite element model. The tailings＇ behavior was modeled using an elasto-plastic multi-yielding constitutive model, and Chilean earthquake records were used for the seismic analyses. Special attention was given to the liquefaction potential evaluation of TTD.

关键词： Thickened tailings Liquefaction Periodic modeling

Design of an Active Flexible Spine for Wall Climbing Robot Using Pneumatic Soft Actuators

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Journal of Bionic Engineering 2023年第2期20卷 530-542页

作者： Guangming Chen Tao Lin gabriel Lodewijks Aihong Ji Lab of Locomotion Bioinspiration and Intelligent Robots College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and Astronautics29 Yudao StreetNanjing210016China School of Engineering College of EngineeringScience&EnvironmentUniversity of NewcastleCallaghan CampusUniversity DriveCallaghanNSW2308Australia

Wall climbing robots can be used to undertake missions in many unstructured ***,current wall climbing robots have mobility difficulties such as in the turning or *** of the main reasons for the limitations is the poor flexibility of the *** robotic technology can actively enable structure deformation and stiffness varations,which provides a solution for the design of active flexible *** research utilizes pneumatic soft actuators to design a flexible spine with the abilities of actively bending and twisting by each *** bending and torsion moment equilibriums,respectively,from air pressure to material deformations,the bending and twisting models for a single actuator with respect to different pressure are *** theoretical models are verified by finite-element method simulations and experimental *** addition,the bending and twisiting motions of single joint and whole spine are analytically *** results show that the bionic spine can perform desired deformations in accordance with the applied pressure on specified *** variations of the stiffness are also numerically ***,the effectiveness of the bionic flexible spine for actively producing sequenced motions as biological spine is experimentally *** work demonstrated that the peneumatic spine is potential to improve the spine flexibility of wall climbing robot.

关键词： Active spine Bionic design Soft robot Gecko locomotion Finite-element modeling

Determinants of inspiratory muscle function in healthy children

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Journal of Sport and Health Science 2019年第2期8卷 183-188页

作者： Theodore Dassios gabriel Dimitriou Department of Child Health King's College Hospital Department of Paediatrics University of Patras Medical School

Background: Children are affected by disorders that have an impact on the respiratory muscles. Inspiratory muscle function can be assessed by means of the noninvasive tension–time index of the inspiratory muscles(TTImus). Our objectives were to identify the determinants of TTImus in healthy children and to report normal values of TTImus in this ***: We measured weight, height, upper arm muscle area(UAMA), and TTImusin 96 children aged 6–18 years. The level and frequency of aerobic activity was assessed by ***: TTImuswas significantly lower in male subjects(0.095 ± 0.038, mean ± SD) compared with female subjects(0.126 ± 0.056)(p = 0.002).TTImus was significantly lower in regularly exercising(0.093 ± 0.040) compared with nonexercising subjects(0.130 ± 0.053)(p < 0.001). TTImus was significantly negatively related to age(r =-0.239, p = 0.019), weight(r =-0.214, p = 0.037), height(r =-0.355, p < 0.001), and UAMA(r =-0.222, p = 0.030). Multivariate logistic regression analysis revealed that height and aerobic exercise were significantly related to TTImus independently of age, weight, and UAMA. The predictive regression equation for TTImus in male subjects was TTImus = 0.228-0.001 × height(cm), and in female subjects it was TTImus = 0.320-0.001 × height(cm).Conclusion: Gender, age, anthropometry, skeletal muscularity, and aerobic exercise are significantly associated with indices of inspiratory muscle function in children. Normal values of TTImus in healthy children are reported.

关键词： Aerobic exercise Children Inspiratory muscle function Maximal inspiratory pressure Skeletal muscle function Tension-time index of the inspiratory muscles

Modeling and simulation as a service architecture for deploying resources in the Cloud

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International Journal of Modeling, Simulation, and Scientific Computing 2016年第1期7卷 142-179页

作者： Sixuan Wang gabriel Wainer Department of Systems and Computer Engineering Carleton University Centre for Visualization and Simulation(V-Sim)Ottawa CanadaON K1S-5B6

In recent years,Cloud Computing has become popular to facilitate the use of Modeling and Simulation(M&S)***,there are still various issues to solve,including the structure constrain of chosen web service frameworks,the sharing of varied resources in the Cloud,and the difficulties in reproducing *** show a new architecture based on Cloud Computing and new modeling methods to deal with these *** layered architecture,called Cloud Architecture for Modeling and Simulation as a Service(CAMSaaS),simplifies the deployment of M&S resources as services in the *** supports hierarchical resource services,experimental frameworks,scalable infrastructure and makes everything as a *** deploy varied M&S resources as services in the Cloud,and build a Modeling and Simulation as a Service(MSaaS)middleware called CloudRISE to manage a variety of M&S *** also use the experimental framework concept to simplify the management of experiment *** present a case study for crowd evacuation application using the architecture.

关键词： Modeling and Simulation as a Service Cloud-based Simulation Simulation Middleware RESTful Web Services Cloud Services

Multimodality treatment strategies have changed prognosis of peritoneal metastases

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World Journal of Gastrointestinal Oncology 2016年第1期8卷 67-82页

作者： corneliu lungoci aurel ion mironiuc valentin muntean traian oniu hubert leebmann max mayr pompiliu piso department of surgery "iuliu htieganu"university of medicine and pharmacy cluj-napoca400015 Cluj-NapocaCluj ProvinceRomania clinic of visceral and general surgery krankenhaus barmherzige bruederacademic teaching hospitals of the university regensburgBavaria ProvinceGermany

For a long time, treatment of peritoneal metastases(PM) was mostly palliative and thus, this status was link with "terminal status/despair". The current multimodal treatment strategy, consisting of cytoreductive surgery(CRS) and hyperthermic intraperitoneal chemotherapy(HIPEC), has been strenuously achieved over time, but seems to be the best treatment option for PM patients. As we reviewed the literature data, we could emphasize some milestones and also, controversies in the history of proposed multimodal treatment and thus, outline the philosophy of this approach, which seems to be an unusual one indeed. Initially marked by nihilism and fear, but benefiting from a remarkable joint effort of human and material resources(multi-center and-institutional research), over a period of 30 years, CRS and HIPEC found their place in the treatment of PM. The next 4 years were dedicated to the refinement of the multimodal treatment, by launching research pathways. In selected patients, with requires training, it demonstrated a significant survival results(similar to the Hepatic Metastases treatment), with acceptable risks and costs. The main debates regarding CRS and HIPEC treatment were based on the oncologists' perspective and the small number of randomized clinical trials. It is important to statement the PM patient has the right to be informed of the existence of CRS and HIPEC, as a real treatment resource, the decision being made by multidisciplinary teams.

关键词： Hyperthermic intraperitoneal chemotherapy Peritonectomy procedures Systemic chemotherapy Peritoneal metastases Survival

Laparoscopic resection of gastrointestinal neuroendocrine tumors with special contribution of radionuclide imaging

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World Journal of Gastroenterology 2014年第42期20卷 15608-15615页

作者： Andreas Shamiyeh Michael gabriel Ludwig Boltzmann Institute for Operative Laparoscopy and 2nd Surgical Department Linz General Hospital Department of Nuclear Medicine and Endocrinology Linz General Hospital University Clinic of Nuclear Medicine Medical University of Innsbruck

The surgical treatment of neuroendocrine tumors(NETs) draws on experience and guidelines more than on prospective randomized trials. The incidence of NET is increasing in all parts of the gastrointestinal tract. A variety of classifications introduced over the last decade may have led to difficulties in judging clinical relevance and determining the right surgical strategy. The North American Neuroendocrine Tumor Society and the European Neuroendocrine Tumor Society have developed usable guidelines from the available literature. For more than 20 years laparoscopy has developed as the gold standard for various surgical indications. Nevertheless, few trials have compared open and laparoscopic surgery with regard to NET. This review summarizes the recent literature on surgery for NET and incorporates the evidence on laparoscopy for cancer which might be also applied for NET.

关键词： Neuroendocrine tumors Gastrointestinal Laparoscopy Image-guided surgery Somatostatin receptor imaging

Erratum to:Sub-gap defect density characterization of molybdenum oxide:An annealing study for solar cell applications

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Nano Research 2022年第8期15卷 7752-7753页

作者： Daniele Scirè Paul Procel Antonino Gulino Olindo Isabella miro Zeman Isodiana Crupi Department of Engineering University of PalermoPalermo 90128Italy Photovoltaic Materials and Devices group Delft University of TechnologyDelft 2628 CDthe Netherlands Department of Chemical Sciences University of CataniaCatania 95125Italy

Erratum to Nano Research 2020,13(12):3416–3424 https://***/10.1007/s12274-020-3029-9 Ref.[56]was unfortunately wrong,Instead of[56]Corless,R.M.;Gonnet,G.H.;Hare,D.E.G.;Jeffrey,D.J.;Knuth,*** the Lambert W ***.1996,5,329–*** should be changed to Biswas,R.K.;Khan,P.;Mukherjee,S.;Mukhopadhyay,A.K.;Ghosh,J.;Muraleedharan,*** of short range structure of amorphous Silica from PDF using Ag radiation in laboratory XRD system,RAMAN and *** 2018,488,1–9.

关键词： function. annealing molybdenum

Surgical Infection Society guidelines on antibiotic use in gallstone surgery: high time we crack down on prophylactic antibiotics

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Hepatobiliary Surgery and Nutrition 2022年第6期11卷 893-895页

作者： gabriel Sandblom Department of Clinical Science and Education SödersjukhusetKarolinska InstitutetStockholmSweden Department of Surgery SödersjukhusetStockholmSweden

There is a great need for a more stringent and uniform use of antibiotic prophylaxis in general *** decision to prescribe antibiotics is often made based on local routines or poorly defined reasons for prophylaxis,wit... 详细信息

关键词： surgery routine Surgical

DETERMINISTIC HOMOGENIZATION OF QUASILINEAR DAMPED HYPERBOLIC EQUATIONS

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Acta Mathematica Scientia 2011年第5期31卷 1823-1850页

作者： gabriel Nguetseng Hubert Nnang Nils Svanstedt Faculty of Sciences University of Yaounde I P.O. Box 812 Yaounde Cameroon Ecole Normale Suprieure University of Yaounde I P.O. Box 47 Yaounde Cameroon Department of Mathematical Sciences University of Gothenburg SE-412 96 Gteborg Sweden

Deterministic homogenization is studied for quasilinear monotone hyperbolic problems with a linear damping term. It is shown by the sigma-convergence method that the sequence of solutions to a class of multi-scale hig... 详细信息

关键词： homogenization sigma-convergence quasilinear hyperbolic