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Introduction. Pseudoaneurysms of superior mesenteric artery and its branches are extremely rare but life threatening when complications occur. However, the diagnosis is often missed or delayed because of its non-specific signs and symptoms. Treatments depend on patient’s characteristics. In contrast to conventional open surgery, endovascular therapy has been reported as an effective option with minimally invasion, low complication, short recovery time and good outcome, especially in high-risk patients. Case presentation. We describe a case of ruptured pseudoaneurysm of ileal artery, a branch of superior mesenteric artery, presenting with gastrointestinal bleeding signs while on anticoagulant therapy. Both upper and lower gastrointestinal endoscopy were inconclusive. The diagnosis was confirmed by angiography and the patient was successfully treated by coil embolization. Conclusions. Ruptured pseudoaneurysm of superior mesenteric artery and its branches should be suspected in patients with unexplained gastrointestinal hemorrhage. Endovascular intervention is a feasible approach, especially in patients with multiple comorbidities and high bleeding risk.

We extend our previous work in collaboration with Ngô Bao Châu and give a fixed point formula for the elliptic part of moduli spaces of $G$-shtukas with arbitrary modifications. Our formula is similar to the fixed point formula of Kottwitz for certain Shimura varieties. Our method is inspired by that of Kottwitz and simpler than that of Lafforgue for the fixed point formula of the moduli space of Drinfeld $\text{GL} (r)$-shtukas. [ABSTRACT FROM PUBLISHER]

The objective of this paper is to investigate the bond properties of prestressing strands embedded in Ultra–High–Performance Concrete (UHPC).The UHPC was made in laboratory using local materials in Vietnam.Its mixture contains: silica aggregates, portland cement PC40, fly ash, silica fume, polycarboxylate superplasticizer and the micro steel fibers.The experimental process is realized on a pull-out test. The volume fraction of micro steel fibers in UHPC was 2%. The prestressing strand with diameters of 15.2mm was considered. The interface shear strength between strand and UHPC is identified based on the results of force and displacement obtained during the pull-out test. The Cohesive Zone Model (CZM) is implemented in finite element model to study this interface behavior. This model described by a piecewise linear elastic law. The CZM’s parameters are identified based on experimental results of pull-out test.The numerical studies are used the CZM in ANSYS software. Two numerical tests are realized and compared with experimental results: pull-out test and other test to verify the deflection of I girder due to prestressing force.