检索结果-南通市图书馆

Acute biliary pancreatitis and cholecystolithiasis in a child: one time treatment with laparoendoscopic "Rendez-vous" procedure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第11期12卷 1782-1785页

作者： Gaetano La Greca Michele Di Blasi francesco barbagallo Manuela Di Stefano Saverio Latteri Domenico Russello Department of Surgical Sciences Transplantation and Advanced Technologies University of Catania Cannizzaro HospitalVia Messina 829-95100CataniaItaly

尖锐胆汁的胰腺炎(ABP ) 在童年是稀罕的，内视镜的括约肌切开术应该由于在内视镜的过程和胆囊炎之间的最佳的预定仍然是的早、迟了的复杂并发症，但是，必要时的风险在孩子被避免不明确。有尖锐胆汁的胰腺炎的九个岁孩子经历了成功的 l... 详细信息

尖锐胆汁的胰腺炎(ABP ) 在童年是稀罕的，内视镜的括约肌切开术应该由于在内视镜的过程和胆囊炎之间的最佳的预定仍然是的早、迟了的复杂并发症，但是，必要时的风险在孩子被避免不明确。有尖锐胆汁的胰腺炎的九个岁孩子经历了成功的 laparo 内视镜的“约会”胆总管和 laparoscopic 胆囊炎的内视镜的排水同时在被执行的过程。这是在一个孩子 laparo 内视镜的约会报导的第一个案例。这个病人的优秀结果和有关为如此的案例的治疗的另外的可得到的选择的文学的评论建议这个过程提供大优点特别在孩子，减少治疗的要求的数字，低效率的风险，麻醉的数字，医院停留的长度和因医生之治疗而引的病态的风险。

关键词：胆汁胰腺炎胆石疾病内窥镜

Successful endoscopic repair of an unusual colonic perforation following polypectomy using an endoclip device

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第20期13卷 2889-2891页

作者： francesco barbagallo Giorgio Castello Saverio Latteri Emanuele Grasso Salvatrice Gagliardo Gaetano La Greca Michele Di Blasi Department of Surgical Sciences Transplantation and Advanced TechnologiesUniversity of CataniaPadiglione 29Policlinico UniversitarioVia S. SofiaCatania 95100Italy Digestive Endoscopic Unit University of CataniaP.O. CannizzaroVia Messina 829Catania 95126Italy

Colonic perforation during endoscopic diagnostic or therapeutic procedures,represents an uncommon occurrence even if,together with haemorrhage,it is still the most common complication of colonoscopy,with an incidence ranging between 0.1% and 2% of all colonoscopic procedures. The ideal treatment in these cases remains elusive as the endoscopist and the surgeon have to make a choice case by case,depending on many factors such as how promptly the rupture is identified,the condition of the patient,the degree of contamination and the evidence of peritoneal irritation. Surgical interventions both laparotomic and laparoscopic,and other medical non-operative solutions are described in the literature. Only three cases have been reported in the literature in which the endoscopic apposition of endoclips was used to repair a colonic perforation during colonoscopy. Ours is the first case that the perforation itself was caused by the improper functioning of a therapeutic device.

关键词：息肉切除术结肠穿孔内窥镜气腹

Laparo-endoscopic “Rendezvous” to treat cholecysto-choledocolithiasis: Effective,safe and simplifies the endoscopist’s work

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第18期14卷 2844-2850页

作者： Gaetano La Greca francesco barbagallo Michele Di Blasi Andrea Chisari Rosario Lombardo Rosario Bonaccorso Saverio Latteri Andrea Di Stefano Domenico Russello Department of Surgical Sciences Transplantation and Advanced Technologies University of Catania Cannizzaro Hospital Via Messina 829 Catania 95126 Italy Endoscopic Unit Cannizzaro Hospital Via Messina 829 Catania 95126 Italy

AIM: To investigate our clinical experience with combined laparo-endoscopic Rendezvous (RV) for the treatment of patients affected by gallstones and common bile duct (CBD) stones and especially to study the never evaluated opinion of the endoscopist concerning the difficulty of the intraoperative endoscopic procedure during the RV in comparison with standard endoscopic retrograde cholangio-pancreatography (ERCP). METHODS: Eighty consecutive patients affected by cholecystolithiasis and diagnosed or suspected CBD stones were treated with a standardized "tailored" RV. The relevant technical features, the feasibility, the effectiveness in stone clearance, the safety but also the simple evaluation of difficulty and agreement of the endoscopist were analyzed with a questionnaire. RESULTS: The feasibility was 97.5% and the effectiveness 100% concerning CBD clearance and solution of coexisting problems at the papilla. Minor morbidity was 3.3%, the operating time was prolonged by a mean of 14 min, the mean hospital stay was 3.8 d and only one stone’s recurrence occurred. The endoscopist evaluated the procedure to be simpler than standard ERCP-ES in 81.2% of the cases.CONCLUSION: Simultaneous RV carries higheffectiveness and safety at least comparable to those reported for other options. The endoscopist is very often satisfied with this approach because of the minimization of some steps of the endoscopic procedure and avoidance of relevant iatrogenic risk factors. If the mandatory collaboration between surgeons and endoscopists is guaranteed, this approach can often be preferable for the patient, the surgeon, the endoscopist and the hospital.

关键词：胆结石内窥镜胰腺X线照相术括约肌切开术

Suffocated shoots:Hypoxia-induced synthesis of salicylic acid inhibits plant regeneration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2024年第4期17卷 528-530页

作者： Ximena Chirinos francesco Licausi Department of Biology University of OxfordSouth Parks RoadOxford OX13RBUK

Plant cells possess the unique ability to revert differentiated somatic cells back to a pluripotent state,a trait utilized in in vitro tissue culture.This plant propagation strategy involves the exogenous supplementation of auxin and cytokinin,two phytohormones that promote cellular reprogramming and de novo organogenesis.When exposed to an auxin-rich medium,somatic cells proliferate and form the callus,a pluripotent cell mass.Following the attainment of pluripotency,the callus can be transferred to a cytokinin-rich medium to induce shoot regeneration.

关键词： plant synthesis transferred

Impact of apolipoprotein E isoforms on sporadic Alzheimer's disease:beyond the role of amyloid beta

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第1期19卷 80-83页

作者： Madia Lozupone francesco Panza Neurodegenerative Disease Unit Department of Basic MedicineNeuroscienceand Sense OrgansUniversity of Bari Aldo MoroBariItaly Unit of Research Methodology and Data Sciences for Population Health National Institute of Gastroenterology“Saverio de Bellis”Research HospitalCastellana GrotteBariItaly

The impact of apolipoprotein E(ApoE)isoforms on sporadic Alzheimer's disease has long been studied;however,the influences of apolipoprotein E gene(APOE)on healthy and pathological human brains are not fully understood.ApoE exists as three common isoforms(ApoE2,ApoE3,and ApoE4),which differ in two amino acid residues.Traditionally,ApoE binds cholesterol and phospholipids and ApoE isoforms display diffe rent affinities for their receptors,lipids transport and distribution in the brain and periphery.The role of ApoE in the human depends on ApoE isoforms,brain regions,aging,and neural injury.APOE E4 is the strongest genetic risk factor for sporadic Alzheimer's disease,considering its role in influencing amyloid-beta metabolism.The exact mechanisms by which APOE gene variants may increase or decrease Alzheimer's disease risk are not fully understood,but APOE was also known to affect directly and indirectly tau-mediated neurodegeneration,lipids metabolism,neurovascular unit,and microglial function.Consistent with the biological function of ApoE,ApoE4 isoform significantly alte red signaling pathways associated with cholesterol homeostasis,transport,and myelination.Also,the rare protective APOE variants confirm that ApoE plays an important role in Alzheimer's disease pathogenesis.The objectives of the present mini-review were to describe classical and new roles of various ApoE isoforms in Alzheimer's disease pathophysiology beyond the deposition of amyloid-beta and to establish a functional link between APOE,brain function,and memory,from a molecular to a clinical level.APOE genotype also exerted a heterogeneous effect on clinical Alzheimer's disease phenotype and its outcomes.Not only in learning and memory but also in neuro psychiatric symptoms that occur in a premorbid condition.Cla rifying the relationships between Alzheimer's disease-related pathology with neuropsychiatric symptoms,particularly suicidal ideation in Alzheimer's disease patients,may be useful for elucidating also the underlying pathophysiological pro

关键词： Alzheimer's disease amyloid-beta apolipoprotein E dementia glymphatic transport lipids neuropsychiatric symptoms neurovascular unit tau protein

Autonomous Vehicle Platoons In Urban Road Networks:A Joint Distributed Reinforcement Learning and Model Predictive Control Approach

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 141-156页

作者： Luigi D’Alfonso francesco Giannini Giuseppe Franzè Giuseppe Fedele francesco Pupo Giancarlo Fortino IEEE the Department of Computer Engineering ModelingElectronics and SystemsUniversitàdella CalabriaVia Pietro BucciCubo 42-CRende(CS)87036Italy the Department of Mechanical Engineering Energy Engineering and ManagementUniversitàdella CalabriaVia Pietro BucciCubo 42-CRende(CS)87036Italy

In this paper, platoons of autonomous vehicles operating in urban road networks are considered. From a methodological point of view, the problem of interest consists of formally characterizing vehicle state trajectory tubes by means of routing decisions complying with traffic congestion criteria. To this end, a novel distributed control architecture is conceived by taking advantage of two methodologies: deep reinforcement learning and model predictive control. On one hand, the routing decisions are obtained by using a distributed reinforcement learning algorithm that exploits available traffic data at each road junction. On the other hand, a bank of model predictive controllers is in charge of computing the more adequate control action for each involved vehicle. Such tasks are here combined into a single framework:the deep reinforcement learning output(action) is translated into a set-point to be tracked by the model predictive controller;conversely, the current vehicle position, resulting from the application of the control move, is exploited by the deep reinforcement learning unit for improving its reliability. The main novelty of the proposed solution lies in its hybrid nature: on one hand it fully exploits deep reinforcement learning capabilities for decisionmaking purposes;on the other hand, time-varying hard constraints are always satisfied during the dynamical platoon evolution imposed by the computed routing decisions. To efficiently evaluate the performance of the proposed control architecture, a co-design procedure, involving the SUMO and MATLAB platforms, is implemented so that complex operating environments can be used, and the information coming from road maps(links,junctions, obstacles, semaphores, etc.) and vehicle state trajectories can be shared and exchanged. Finally by considering as operating scenario a real entire city block and a platoon of eleven vehicles described by double-integrator models, several simulations have been performed with the aim to put in light the main f eatures of the pro

关键词： Distributed model predictive control distributed reinforcement learning routing decisions urban road networks

Impact characterization on thin structures using machine learning approaches

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第2期37卷 30-44页

作者： Flavio DIPIETRANGELO francesco NICASSIO Gennaro SCARSELLI Department of Engineering for Innovation University of SalentoLecce 73100Italy

Machine learning algorithms are trained and compared to identify and to characterise the impact on typical aerospace panels of different geometry.Experimental activities are conducted to build a proper impacts’dataset.Polynomial regression algorithm and artificial neural network are applied and optimised to panels without stringer to test their capability to identify the impacts.Subsequently,the algorithms are applied to panels reinforced with stringers that represent a significant increase of complexity in terms of dynamic features of the system to test:the focus is not only on the impact position’s detection but also on the event’s severity.After the identification of the best algorithm,the corresponding machine learning model is deployed on an ARM processor minicomputer,implementing an impact detection system,able to be installed on board an aerial vehicle,making it a smart aircraft equipped with an artificial intelligence decision-making system.

关键词： Artificial neural network Impact localisation Machine learning Polynomial regression Structural health monitoring

Impact of cattle density on the structure and natural regeneration of a turkey oak stand on an agrosilvopastoral farm in central Italy

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2024年第1期35卷 168-182页

作者： Alessandra Pacini francesco Pelleri francesco Marini Alberto Maltoni Barbara Mariotti Gianluigi Mazza Maria Chiara Manetti Department of Agriculture FoodEnvironmentand ForestryUniversity of Florence50144 FlorenceItaly CREA Research Centre for Forestry and Wood 52100 ArezzoItaly PEFC Programme for the Endorsement of Forest Certification 06135 PerugiaItaly

On an agrosilvopastoral farm in central Italy where Maremmana cattle graze in Turkey oak forests,we evaluated the impact of different livestock densities on stand structure,tree diversity and natural regeneration in four types of grazed areas based on the grazing regime adopted:calf-grazed,high-intensity-grazed,low-intensity-grazed,ungrazed control.For each area,we set up three permanent circular plots(radius of 15 m)to survey the structural and dasometric characteristics of the overstorey,understorey,and regeneration layer.The results showed that grazing negatively affected the complexity of the forest structure and its potential to regenerate and maintain a high level of biodiversity.The differences in stand structure observed between the grazing areas were closely related to livestock density.The most sensitive components of the system were the understorey and the regeneration layers.Contrarily,the current grazing management did not affect the dominant tree structure or its composition.Our findings identified medium-term monitoring and regeneration management as the two significant aspects to consider when assessing sustainable livestock.New forests can be established by excluding graz-ing for about 20–25 years.

关键词： Agroforestry Stand structure Regeneration Tree biodiversity Grazing intensity

Polymerization of 1,3-Butadiene with Catalysts Based on Cobalt Dichloride Complexes with Aminophosphines: Switching the Regioselectivity by Varying the MAO/Co Molar Ratio

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第4期42卷 501-510页

作者： Giovanni Ricci Anna Sommazzi francesco Masi Alessandra Forni CNR-Istituto di Scienze e Tecnologie Molecolari“Giulio Natta”(SCITEC) via A.Corti 1220133MilanoItaly Viale Giovanni XXIII 34 I-28100NovaraNOItaly Via Galvani 7 I-26866Sant’Angelo LodigianoLOItaly CNR-Istituto di Scienze e Tecnologie Molecolari“Giulio Natta”(SCITEC) via C.Golgi 1920133MilanoItaly

Several novel cobalt dichloride complexes with amino-phosphine bidentate ligands were synthesized and characterized.For some of them single crystals were obtained and their molecular structure was determined by X-ray diffraction method.All the complexes were then used in combination with MAO for the polymerization of 1,3-butadiene,obtaining polymers with different structures(i.e.,predominantly 1,2 or cis-1,4)mainly depending on the type of ligand and on the MAO/Co molar ratio.The behavior of these novel catalysts was compared with that exhibited,in the polymerization of the same monomer,by the systems CoCl_(2)(PR3)2-MAO and CoCl_(2)(PRPh2)2-MAO(R=alkyl or cycloalkyl group),and by the systems based on cobalt dichloride complexes with various bi-and tridentate ligands(e.g.,diphosphines,bis-imines,pyridyl-imines,bis-iminopyridines).The comparison between the different systems allowed us to make some clarity about the actual and effective role played by the various types of ligands in the polymerization of conjugated dienes with catalytic systems CoCl_(2)(L)-MAO,in which L=mono-,bi-,or tri-dentate ligand.

关键词： 1,3-Butadiene Stereospecific polymerization Cobalt catalysts Regioselectivity Aminophosphine ligands Crystal structures Chelate rings