Energy Absorption Characteristics and Assessment of Failure Criteria During Ship Collisions

Ship collision against rigid bodies is a very complex phenomenon and a large number of parameters are involved. All analytical methods developed until now consider the colliding ship as a rigid structure. This suggests that methods used to date have not considered the deformation of the ship. The potential energy derived is estimated as a function of the available kinetic energy prior to the collision. Especially in the case of grounding the response of the ship during the impact is examined with the equations of motion and kinematic relationships. The energy dissipated on the structural members and the kinetic energy lost due to the collision still remains unknown. The use of Finite Element Methods has proved to be, one way to analyse the structural response of a ship structure during collision. It is feasible to ascertain the effect of mass inertia, strain rate hardening, complicated boundary conditions etc. In this thesis a three-dimensional finite element model of a bow, is presented for the collision and grounding with a rigid object. The energy dissipation of the structural configuration is examined and compared with the existing empirical methods. A parametric study is performed and the results are presented in terms of velocity, the duration of the collision and the relative penetration. An evaluation for the calculation of the indentation is compared with existing empirical approaches. Furthermore a fracture criterion is introduced on the basis of the energy released during crack propagation. A comparative study is shown involving three other failure criteria and the fracture criterion utilisation is validated on the bow model during the collision with a rigid surface. Results are generated with regard to the indentation, limit speeds and potential energy dissipated on the bow

Oncological cases and complications in Urology.

This collection of cases describes some unusual urological tumors and complications related to urological tumors and their treatment. Case 1: A case of left hydronephrosis referred four years after a right radical mastectomy for lobular breast carcinoma was described. Computed tomography scan revealed a left hydronephrosis with dilated ureter up to the proximal third. An exploratory laparoscopy was performed and the definitive histopathology examination showed a recurrence of the carcinoma with a right tubal metastasis and peritoneal carcinosis. Case 2: A rare case of an extensive penile squamous cell carcinoma in a young man. The patient was treated with radical surgery and modified inguinal lymphadenectomy. No recurrence was noticed so far. Case 3: A rare case of left sided Inferior Vena Cava (IVC) in a patient diagnosed with renal cell cancer who underwent open left partial nephrectomy. Case 4: A case of urethrorrhagia, caused by a recent trauma from an urinary catheter placed in a patient submitted to gastric resection due to a neoplastic pathology. Urethrorrhagia only temporarily responded to conservative treatment and ultimately resolved by coagulation with an endoscopic approach

Oncology and complications.

This collection of cases describes some unusual urological tumors and complications related to urological tumors and their treatment. Case 1: A case of uretero-arterial fistula in a patient with long-term ureteral stenting for ureteral oncological stricture and a second case associated to retroperitoneal fibrosis were described. Abdominal CT, pyelography, cystoscopy were useful to show the origin of the bleeding. Angiography is useful for confirming the diagnosis and for subsequent positioning of an endovascular prosthesis which represents a safe approach with reduced post-procedural complications. Case 2: A case of patient who suffered from interstitial pneumonitis during a cycle of intravesical BCG instillations for urothelial cancer. The patient was hospitalized for more than two weeks in a COVID ward for a suspected of COVID-19 pneumonia, but he did not show any evidence of SARS-CoV-2 infection during his hospital stay. Case 3: A case of a young man with a functional urinary bladder paraganglioma who was successfully managed with complete removal of the tumor, leaving the urinary bladder intact. Case 4: A case of a 61 year old male suffering from muscle invasive bladder cancer who was admitted for a radical cystectomy and on the eighth postoperative day developed microangiopathic hemolytic anemia and thrombocytopenia, which clinically defines thrombotic microangiopathy

Agent relationship analysis in organisational transformation The ARMA methodology for systematic business process redesign

SIGLEAvailable from British Library Document Supply Centre- DSC:D062986 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

State of the art in business process management

Business Process Management (BPM) has been in existence for decades. In broad terms BPM uses, complements, integrates and extends theories, methods and tools from other scientific disciplines like: strategicmanagement, information technology, managerial accounting, operations management etc