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| 1 | Adhesive small bowel adhesions obstruction: Evolutions in diagnosis, management and prevention显示文摘Intra-abdominal adhesions following abdominal surgery represent a major unsolved problem. They are the first cause of small bowel obstruction. Diagnosis is based on clinical evaluation, water-soluble contrast followthrough and computed tomography scan. For patients presenting no signs of strangulation, peritonitis or severe intestinal impairment there is good evidence to support non-operative management. Open surgery is the preferred method for the surgical treatment of adhesive small bowel obstruction, in case of suspected strangulation or after failed conservative management, but laparoscopy is gaining widespread acceptance especially in selected group of patients. 'Good' surgical technique and anti-adhesive barriers are the main current concepts of adhesion prevention. We discuss current knowledge in modern diagnosis and evolving strategies for management and prevention that are leading to stratified care for patients. | Fausto Catena Salomone Di Saverio Federico Coccolini Luca Ansaloni Belinda De Simone Massimo Sartelli Harry Van Goor | 2016 | World Journal of Gastrointestinal Surgery2016，8，3： | 28 |
| 2 | Adjusting CA19-9 values to predict malignancy in obstructive jaundice:Influence of bilirubin and C-reactive protein显示文摘AIM:To find a possible relationship between inflammation and CA19-9 tumor marker by analyzing data from patients with benign jaundice(BJ) and malignant jaundice(MJ).METHODS:All patients admitted for obstructive jaundice,in the period 2005-2009,were prospectively enrolled in the study,obtaining a total of 102 patients.On admission,all patients underwent complete standard blood test examinations including C-reactive protein(CRP),bilirubin,CA19-9.Patients were considered eligible for the study when they presented obstructive jaundice confirmed by instrumental examinations and increased serum bilirubin levels(total bilirubin > 2.0 mg/dL).The standard cut-off level for CA19-9 was 32 U/mL,whereas for CRP this was 1.5 mg/L.The CA19-9 level was adjusted by dividing it by the value of serum bilirubin or by the CRP value.The patients were divided into 2 groups,MJ and BJ,and after the adjustment a comparison between the 2 groups of patients was performed.Sensitivity,specificity and positive predictive values were calculated before and after the adjustment.RESULTS:Of the 102 patients,51 were affected by BJ and 51 by MJ.Pathologic CA19-9 levels were found in 71.7% of the patients.In the group of 51 BJ patients there were 29(56.9%) males and 22(43.1%) females with a median age of 66 years(range 24-96 years),whereas in the MJ group there were 24(47%) males and 27(53%) females,with a mean age of 70 years(range 30-92 years).Pathologic CA19-9 serum level was found in 82.3% of MJ.CRP levels were pathologic in 66.6% of the patients with BJ and in 49% with MJ.Bilirubin and CA19-9 average levels were significantly higher in MJ compared with BJ(P = 0.000 and P = 0.02),while the CRP level was significantly higher in BJ(P = 0.000).Considering a CA19-9 cut-off level of 32 U/mL,82.3% in the MJ group and 54.9% in the BJ group were positive for CA19-9(P = 0.002).A CA19-9 cut-off of 100 U/mL increases the difference between the two groups:35.3% in BJ and 68.6% in MJ(P = 0.0007).Adjusting the CA19-9 value by dividing it by serum bilirubin level meant that 21.5% in the BJ and 49% in the MJ group remained with a positive CA19-9 value(P = 0.003),while adjusting the CA19-9 value by dividing it by serum CRP value meant that 31.4% in the BJ group and 76.5% in the MJ group still had a positive CA19-9 value(P = 0.000004).Sensitivity,specificity,positive predictive values of CA19-9 > 32 U/mL were 82.3%,45% and 59.1%;when the cutoff was CA19-9 > 100 U/mL they were,respectively,68.6%,64.7% and 66%.When the CA19-9 value was adjusted by dividing it by the bilirubin or CRP values,these became 49%,78.4%,69.4% and 76.5%,68.6%,70.9%,respectively.CONCLUSION:The present study proposes CRP as a new and useful correction factor to improve the diag-nostic value of the CA19-9 tumor marker in patients with cholestatic jaundice. | Gaetano La Greca Maria Sofia Rosario Lombardo Saverio Latteri Agostino Ricotta Stefano Puleo Domenico Russello | 2012 | World Journal of Gastroenterology2012，18，31： | 20 |
| 3 | Laparo-endoscopic “Rendezvous” to treat cholecysto-choledocolithiasis: Effective,safe and simplifies the endoscopist’s work显示文摘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. | Gaetano La Greca Francesco Barbagallo Michele Di Blasi Andrea Chisari Rosario Lombardo Rosario Bonaccorso Saverio Latteri Andrea Di Stefano Domenico Russello | 2008 | World Journal of Gastroenterology2008，14，18： | 15 |
| 4 | Advances in laparoscopy for acute care surgery and trauma显示文摘The greatest advantages of laparoscopy when compared to open surgery include the faster recovery times, shorter hospital stays, decreased postoperative pain, earlier return to work and resumption of normal daily activity as well as cosmetic benefits. Laparoscopy today is considered the gold standard of care in the treatment of cholecystitis and appendicitis worldwide. Laparoscopy has even been adopted in colorectal surgery with good results. The technological improvements in this surgical field along with the development of modern techniques and the acquisition of specific laparoscopic skills have allowed for its utilization in operations with fully intracorporeal anastomoses. Further progress in laparoscopy has included single-incision laparoscopic surgery and natural orifice trans-luminal endoscopic surgery. Nevertheless, laparoscopy for emergency surgery is still considered challenging and is usually not recommended due to the lack of adequate experience in this area. The technical difficulties of operating in the presence of diffuse peritonitis or large purulent collections and diffuse adhesions are also given as reasons. However, the potential advantages of laparoscopy, both in terms of diagnosis and therapy, are clear. Major advantages may be observed in cases with diffuse peritonitis secondary to perforated peptic ulcers,for example, where laparoscopy allows the confirmation of the diagnosis, the identification of the position of the ulcer and a laparoscopic repair with effective peritoneal washout. Laparoscopy has also revolutionized the approach to complicated diverticulitis even when intestinal perforation is present. Many other emergency conditions can be effectively managed laparoscopically, including trauma in select hemodynamically-stable patients. We have therefore reviewed the most recent scientific literature on advances in laparoscopy for acute care surgery and trauma in order to demonstrate the current indications and outcomes associated with a laparoscopic approach to the treatment of the most common emergency surgical conditions. | Matteo Mandrioli Kenji Inaba Alice Piccinini Andrea Biscardi Massimo Sartelli Ferdinando Agresta Fausto Catena Roberto Cirocchi Elio Jovine Gregorio Tugnoli Salomone Di Saverio | 2016 | World Journal of Gastroenterology2016，22，2： | 11 |
| 5 | 为 Budd-Chiari 症候群的 caval 自体移植片由于劣等的静脉 cava 阻塞显示文摘 Transjugular intrahepatic portosystemic shunt (TIPS) is the standard treatment of Budd-Chiari syndrome (BCS) non responsive to medical therapy. However, patients with inferior vena cava (IVC) obstruction proximal to the atrium do not benefit from TIPS and a surgical approach is mandatory. We report the case of BCS due to intrapericardial IVC obstruction. We describe a novel surgical approach using a fresh caval homograft. An attempt to balloon dilatation of the IVC obstruction was complicated by right atrial disruption with tamponade and ventricular fibrillation. Lately, the patient successfully underwent a reconstruction of the cavo-atrial continuity by the interposition of a fresh caval homograft, a novel surgical approach never described before for BCS. Further follow-up revealed progressive reduction and resolution of ascites, and overall clinical improvement. IVC obstruction near to the atrium can be surgically approached with a new technique consisting in inferior vena cava resection and replacement with a caval homograft. | Andrea Mancuso Luigi Martinelli Luciano De Carlis Antonio Gaetano Rampoldi Giovanni Magenta Aldo Cannata Luca Saverio Belli | 2013 | World Journal of Hepatology2013，5，5： | 9 |
| 6 | Endoscopic approach to malignant strictures at the hepatic hilum显示文摘Hilar tumors have proven to be a challenge to treat and manage because of their poor sensitivity to conventional therapies and our inability to prevent or to detect early tumor formation. Endoscopic stent drainage has been proposed as an alternative to biliary-enteric bypass surgery and percutaneous drainage to palliate malignant biliary obstruction. Prosthetic palliation of patients with malignant hilar stenoses poses particular difficulties, especially in advanced lesions (type n lesions or higher). The risk of cholangitis after contrast injection into the biliary tree in cases where incomplete drainage is achieved is well known. The success rate of plastic stent insertion is around 80% in patients with proximal tumors. Relief of symptoms can be achieved in nearly all patients successfully stented. | Giovanni D De Palma Stefania Masone Maria Rega Immacolata Simeoli Francesca Salvatori Saverio Siciliano Francesco Maione Valerio Girardi Marta Celiento Giovanni Persico | 2007 | World Journal of Gastroenterology2007，13，30： | 8 |
| 7 | Laparoscopic management of intra-abdominal infections:Systematic review of the literature显示文摘AIM: To investigate the role of laparoscopy in diagnosis and treatment of intra abdominal infections.METHODS: A systematic review of the literature was performed including studies where intra abdominal infections were treated laparoscopically.RESULTS: Early laparoscopic approaches have become the standard surgical technique for treating acute cholecystitis. The laparoscopic appendectomy has been demonstrated to be superior to open surgery in acute appendicitis. In the event of diverticulitis, laparoscopic resections have proven to be safe and effective procedures for experienced laparoscopic surgeons and may be performed without adversely affecting morbidity and mortality rates. However laparoscopic resection has not been accepted by the medical community as the primary treatment of choice. In high-risk patients, laparoscopic approach may be used for exploration or peritoneal lavage and drainage. The successful laparoscopic repair of perforated peptic ulcers for experienced surgeons, is demonstrated to be safe and effective. Regarding small bowel perforations, comparative studies contrasting open and laparoscopic surgeries have not yet been conducted. Successful laparoscopic resections addressing iatrogenic colonic perforation have been reported despite a lack of literature-based evidence supporting such procedures. In post-operative infections, laparoscopic approaches may be useful in preventing diagnostic delay and controllingthe source.CONCLUSION: Laparoscopy has a good diagnostic accuracy and enables to better identify the causative pathology; laparoscopy may be recommended for the treatment of many intra-abdominal infections. | Federico Coccolini Cristian Tranà Massimo Sartelli Fausto Catena Salomone Di Saverio Roberto Manfredi Giulia Montori Marco Ceresoli Chiara Falcone Luca Ansaloni | 2015 | World Journal of Gastrointestinal Surgery2015，7，8： | 5 |
| 8 | High mobility group protein-mediated transcription requires DNA damage marker γ-H2AX显示文摘 | Indrabahadur Singh Nihan Ozturk Julio Cordero Aditi Mehta Diya Hasan Claudia Cosentino Carlos Sebastian Marcus Kruger Mario Looso Gianni Carraro Saverio Bellusci Werner Seeger Thomas Braun Raul Mostoslavsky Guillermo Barreto | 2015 | Cell Research2015，25，7： | 5 |
| 9 | Gene alterations in the PI3K/PTEN/AKT pathway as a mechanism of drug-resistance(Review)显示文摘 | Sameh Hafsi Franca Pezzino Saverio Candido Giovanni Ligresti Demetrios Spandidos Zohra Soua James McCubrey Salvatore Travali Massimo Libra | 2012 | International Journal of Oncology2012，，3： | 4 |
| 10 | B-Lynch suture, intrauterine balloon, and endouterine hemostatic suture for the management of postpartum hemorrhage due to placenta previa accreta显示文摘 | Maurizio Arduini Giorgio Epicoco Graziano Clerici Elvira Bottaccioli Saverio Arena Giuseppe Affronti | 2009 | International Journal of Gynecology and Obstetrics2009，，3： | 3 |
| 11 | Conventional colonoscopy and magnified chromoendoscopy for the endoscopic histological prediction of diminutive colorectal polyps: A single operator study显示文摘瞄准:精确地由结肠镜检查把腺瘤区分开来与 non-adenomatous 息肉。方法:结肠镜检查检测的所有损害首先用多彩石印版内视镜检查法与放大跟随的常规看法被诊断。在每个步骤的诊断连续地被记录。所有息肉是为组织学的评估的完全移开的内视镜的联盟者。内视镜的诊断的每种类型的精确性率被评估,用象标准答案的组织检查所见。结果:240 损害的一个总数被识别,哪个(65.8%) 158 是非肿瘤的,(34.2%) 82 是腺瘤。常规看法的全面诊断精确性,和有放大的多彩石印版内视镜检查法是 76.3%(183/240 ) 并且 95.4%(229/240 ) ,分别地(P<0.001 ) 。结论:结肠镜检查和放大多彩石印版内视镜检查法的联合是为区分的最可靠的非活体检视方法从肿瘤的损害非肿瘤。 | Giovanni D De Palma Maria Rega Stefania Masone Marcello Persico Saverio Siciliano Pietro Addeo Giovanni Persico | 2006 | World Journal of Gastroenterology2006，12，15： | 3 |
| 12 | The tumor microenvironment in hepatocellular carcinoma (Review)显示文摘 | Giulia Leonardi Saverio Candido Melchiorre Cervello Daria Nicolosi Fabio Raiti Salvatore Travali Demetrios Spandidos Massimo Libra | 2012 | International Journal of Oncology2012，，6： | 3 |
| 13 | Intraoperative use of indocyanine green fluorescence imaging in rectal cancer surgery: The state of the art显示文摘Indocyanine green(ICG)fluorescence imaging is widely used in abdominal surgery.The implementation of minimally invasive rectal surgery using new methods like robotics or a transanal approach required improvement of optical systems.In that setting,ICG fluorescence optimizes intraoperative vision of anatomical structures by improving blood and lymphatic flow.The purpose of this review was to summarize all potential applications of this upcoming technology in rectal cancer surgery.Each type of use has been separately addressed and the evidence was investigated.During rectal resection,ICG fluorescence angiography is mainly used to evaluate the perfusion of the colonic stump in order to reduce the risk of anastomotic leaks.In addition,ICG fluorescence imaging allows easy visualization of organs such as the ureter or urethra to protect them from injury.This intraoperative technology is a valuable tool for conducting lymph node dissection along the iliac lymphatic chain or to better identifying the rectal dissection planes when a transanal approach is performed.This is an overview of the applications of ICG fluorescence imaging in current surgical practice and a synthesis of the results obtained from the literature.Although further studies are need to investigate the real clinical benefits,these findings may enhance use of ICG fluorescence in current clinical practice and stimulate future research on new applications. | Roberto Peltrini Mauro Podda Simone Castiglioni Maria Michela Di Nuzzo Michele D'Ambra Ruggero Lionetti Maurizio Sodo Gaetano Luglio Felice Mucilli Salomone Di Saverio Umberto Bracale Francesco Corcione | 2021 | World Journal of Gastroenterology2021，27，38： | 3 |
| 14 | In-vivo characterization of DALM in ulcerative colitis with high-resolution probe-based confocal laser endomicroscopy显示文摘Recently,the use of confocal laser endomicroscopy(CLE) in the diagnosis of chronic ulcerative colitis(CUC) was reported.In this brief report we aimed to assess the application of probe-based CLE to characterize colonic mucosa and dysplasia in CUC.The study involved a patient presenting long-standing CUC.Confocal imaging of both the inflamed mucosa,a circumscribed lesion(dysplasiaassociated lesional mass),and adjacent colonic mucosa are demonstrated and the correlation between the CLE and histological images.Inflamed mucosa and dysplasia showed specific alteration of crypt architecture,cellular infiltration,and vessel architecture with an excellent correlation between CLE and standard histological examination. | Giovanni D De Palma Stefania Staibano Saverio Siciliano Francesco Maione Maria Siano Dario Esposito Giovanni Persico | 2011 | World Journal of Gastroenterology2011，17，5： | 3 |
| 15 | Simultaneous colorectal and parenchymal-sparing liver resection for advanced colorectal carcinoma with synchronous liver metastases:Between conventional and mini-invasive approaches显示文摘The optimal timing of surgery in case of synchronous presentation of colorectal cancer and liver metastases is still under debate.Staged approach,with initial colorectal resection followed by liver resection(LR),or even the reverse,liver-first approach in specific situations,is traditionally preferred.Simultaneous resections,however,represent an appealing strategy,because may have perioperative risks comparable to staged resections in appropriately selected patients,while avoiding a second surgical procedure.In patients with larger or multiple synchronous presentation of colorectal cancer and liver metastases,simultaneous major hepatectomies may determine worse perioperative outcomes,so that parenchymal-sparing LR should represent the most appropriate option whenever feasible.Mini-invasive colorectal surgery has experienced rapid spread in the last decades,while laparoscopic LR has progressed much slower,and is usually reserved for limited tumours in favourable locations.Moreover,mini-invasive parenchymal-sparing LR is more complex,especially for larger or multiple tumours in difficult locations.It remains to be established if simultaneous resections are presently feasible with mini-invasive approaches or if we need further technological advances and surgical expertise,at least for more complex procedures.This review aims to critically analyze the current status and future perspectives of simultaneous resections,and the present role of the available miniinvasive techniques. | Emilio De Raffele Mariateresa Mirarchi Dajana Cuicchi Ferdinando Lecce Riccardo Casadei Claudio Ricci Saverio Selva Francesco Minni | 2020 | World Journal of Gastroenterology2020，26，42： | 3 |
| 16 | Histomorhological and clinical evaluation of maxillary alveolar ridge reconstruction after craniofacial trauma by applying combination of allogeneic and autogenous bone graft显示文摘 | Francesco Saverio De Ponte Roberto Falzea Michele Runci Enrico Nastro Siniscalchi Floriana Lauritano Ennio Bramanti Gabriele Cervino Marco Cicciu | 2017 | Chinese Journal of Traumatology2017，20，1： | 2 |
| 17 | Hepatitis C virus recurrence after liver transplantation:A 10-year evaluation显示文摘AIM: To evaluate the predictors of 10-year survival of patients with hepatitis C recurrence. METHODS: Data from 358 patients transplanted between 1989 and 2010 in two Italian transplant centers and with evidence of hepatitis C recurrence were analyzed. A χ2, Fisher's exact test and Kruskal Wallis' test were used for categorical and continuous variables, respectively. Survival analysis was performed at 10 years after transplant using the Kaplan-Meier method, and a log-rank test was used to compare groups. A P level less than 0.05 was considered significant for all tests. Multivariate analysis of the predictive role of different variables on 10-year survival was performed by a stepwise Cox logistic regression.RESULTS: The ten-year survival of the entire population was 61.2%. Five groups of patients were identified according to the virological response or lack of a response to antiviral treatment and, among those who were not treated, according to the clinical status(mild hepatitis C recurrence, 'too sick to be treated' and patients with comorbidities contraindicating the treatment). While the 10-year survival of treated and untreated patients was not different(59.1% vs 64.7%, P = 0.192), patients with a sustained virological response had a higher 10-year survival rate than both the 'non-responders'(84.7% vs 39.8%, P < 0.0001) and too sick to be treated(84.7% vs 0%, P < 0.0001). Sustained virological responders had a survival rate comparable to patients untreated with mild recurrence(84.7% vs 89.3%). A sustained virological response and young donor age were independent predictors of 10-year survival. CONCLUSION: Sustained virological response significantly increased long-term survival. Awaiting the interferon-free regimen global availability, antiviral treatment might be questionable in selected subjects with mild hepatitis C recurrence. | Stefano Gitto Luca Saverio Belli Ranka Vukotic Stefania Lorenzini Aldo Airoldi Arrigo Francesco Giuseppe Cicero Marcello Vangeli Lucia Brodosi Arianna Martello Panno Roberto Di Donato Matteo Cescon Gian Luca Grazi Luciano De Carlis Antonio Daniele Pinna Mauro Bernardi Pietro Andreone | 2015 | World Journal of Gastroenterology2015，21，13： | 2 |
| 18 | Graphene electronic fibres with touch-sensing and lightemitting functionalities for smart textiles显示文摘The true integration of electronics into textiles requires the fabrication of devices directly on the fibre itself using high-performance materials that allow seamless incorporation into fabrics.Woven electronics and opto-electronics,attained by intertwined fibres with complementary functions are the emerging and most ambitious technological and scientific frontier.Here we demonstrate graphene-enabled functional devices directly fabricated on textile fibres and attained by weaving graphene electronic fibres in a fabric.Capacitive touch-sensors and light-emitting devices were produced using a roll-to-roll-compatible patterning technique,opening new avenues for woven textile electronics.Finally,the demonstration of fabric-enabled pixels for displays and position sensitive functions is a gateway for novel electronic skin,wearable electronic and smart textile applications. | Elias Torres Alonso Daniela P.Rodrigues Mukond Khetani Dong-Wook Shin Adolfo De Sanctis Hugo Joulie Isabel de Schrijver Anna Baldycheva Helena Alves Ana I.S.Neves Saverio Russo Monica F.Craciun | 2018 | npj Flexible Electronics2018，2，1： | 2 |
| 19 | Bioengineering bacterial encapsulin nanocompartments as targeted drug delivery system显示文摘The development of Drug Delivery Systems(DDS)has led to increasingly efficient therapies for the treatment and detection of various diseases.DDS use a range of nanoscale delivery platforms produced from polymeric of inorganic materials,such as micelles,and metal and polymeric nanoparticles,but their variant chemical composition make alterations to their size,shape,or structures inherently complex.Genetically encoded protein nanocages are highly promising DDS candidates because of their modular composition,ease of recombinant production in a range of hosts,control over assembly and loading of cargo molecules and biodegradability.One example of naturally occurring nanocompartments are encapsulins,recently discovered bacterial organelles that have been shown to be reprogrammable as nanobioreactors and vaccine candidates.Here we report the design and application of a targeted DDS platform based on the Thermotoga maritima encapsulin reprogrammed to display an antibody mimic protein called Designed Ankyrin repeat protein(DARPin)on the outer surface and to encapsulate a cytotoxic payload.The DARPin9.29 chosen in this study specifically binds to human epidermal growth factor receptor 2(HER2)on breast cancer cells,as demonstrated in an in vitro cell culture model.The encapsulin-based DDS is assembled in one step in vivo by co-expressing the encapsulin-DARPin9.29 fusion protein with an engineered flavin-binding protein mini-singlet oxygen generator(MiniSOG),from a single plasmid in Escherichia coli.Purified encapsulin-DARPin_miniSOG nanocompartments bind specifically to HER2 positive breast cancer cells and trigger apoptosis,indicating that the system is functional and specific.The DDS is modular and has the potential to form the basis of a multi-receptor targeted system by utilising the DARPin screening libraries,allowing use of new DARPins of known specificities,and through the proven flexibility of the encapsulin cargo loading mechanism,allowing selection of cargo proteins of choice. | Alexander Van de Steen Rana Khalife Noelle Colant Hasan Mustafa Khan Matas Deveikis Saverio Charalambous Clare M.Robinson Rupali Dabas Sofia Esteban Serna Diana A.Catana Konstantin Pildish Vladimir Kalinovskiy Kenth Gustafsson Stefanie Frank | 2021 | Synthetic and Systems Biotechnology2021，6，3： | 2 |
| 20 | Parametrical analysis of the railways dynamic response at high speed moving loads显示文摘The paper introduces some findings about a sensitivity analysis conducted on every geometrical and mechanical parameters which characterize the use of a railway superstructure at the high velocity.This analysis was carried out by implementing a forecast model that is derived from the simplified Gazetas and Dobry one.This model turns out to be particularly appropriate in the explication of problems connected to high velocity,since it evaluates both inertial and viscous effects activated by the moving load speed.The model implementation requires the transfer function determination that represents the action occurred by the bed surfaces on the railway and it therefore contains information concerning the geometrical and the mechanical characteristics of the embankment,of the ballast and of the sub-ballast.The transfer function H has been evaluated with the finite elements method and particularly,by resorting the ANSYS code with a harmonic structural analysis in the frequencies field.The authors,from the critic examination of the system's dynamics response in its entirety,glean a series of observations both of a general and a specific character,finally attaining a propose of a design modification of the standard railway superstructure at the high velocity of train operation adopted today especially in Italy. | Michele Agostinacchio Donato Ciampa Maurizio Diomedi Saverio Olita | 2013 | Journal of Modern Transportation2013，21，3： | 2 |
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