Inelastic Displacement Ratios for Evaluation of Degrading Peak – Oriented SDOF Systems

Estimation of the inelastic displacement demand (IDD) is an important part of the performance-based design. Coefficient method is one of the methods for the estimation of IDD and in this method, IDD is determined by multiplying elastic displacement demand with inelastic displacement ratio (CR ). Previous researches showed that structures deteriorate and also exhibit dynamic instability under severe earthquakes and these behaviors should be considered in the estimation of CR to estimate a reliable IDD. In this study, CR of the non-degrading bilinear hysteretic model and the degrading peak-oriented hysteretic model with collapse potential were determined and effects of degradation on IDD were investigated. Nonlinear time history analysis of SDOF systems were performed using considered hysteretic models. Furthermore a new equation is proposed for the mean CR of degrading SDOF systems. Also, effect of local site conditions and post-yield stiffness on the mean CR of degrading SDOF systems were investigated

Extending displacement-based earthquake loss assessment (DBELA) for the computation of fragility curves

This paper presents a new procedure to derive fragility functions for populations of buildings that relies on the displacement-based earthquake loss assessment (DBELA) methodology. In the method proposed herein, thousands of synthetic buildings have been produced considering the probabilistic distribution describing the variability in geometrical and material properties. Then, their nonlinear capacity has been estimated using the DBELA method and their response against a large set of ground motion records has been estimated. Global limit states are used to estimate the distribution of buildings in each damage state for different levels of ground motion, and a regression algorithm is applied to derive fragility functions for each limit state. The proposed methodology is demonstrated for the case of ductile and non-ductile Turkish reinforced concrete frames with masonry infills

Treatment alternative for irreparable rotator cuff ruptures: Arthroscopic biodegradable balloon

Background: The treatment of massive irreparable rotator cuff rupture has still no consensus among shoulder surgeons. It is assumed that symptomatic rotator cuff tendon rupture is accepted as irreparable if retraction amount of tendon is Patte stage 3 on MRI; degree of fatty atrophy is Goutallier stage 3 or 4; narrowing of acromiohumeral distance is lesser than 7 mm and excursion of tendon to repair has decreased and patient has severe pain. Biodegradable balloon is one of the newest methods for the treatment of irreparable massive rotator cuff ruptures.Objective: The aim of this study was to assess shoulder function in the patients who underwent biodegradable balloon procedure for irreparable massive rotator cuff ruptures.Materials and Methods: Arthroscopic biodegradable balloon method was carried out on the 12 patients, who presented with symptomatic irreparable massive rotator cuff rupture, from October 2010 to November 2013.Results: Preoperative and postoperative mean constant score of patients were 25.8 and 75.4 respectively. The mean Oxford shoulder score of the patients were 21.3 and 42.9 respectively, and mean shoulder abduction degree of the patients were73.5 and 165 respectively. All the patients stated that they were satisfied with the treatment and there was significant regression in their complaints.Conclusion: If conservative treatment is insufficient for patients with irreparable rotator cuff tears, biodegradable balloon method has yielded favorable outcomes in terms of pain and functionality in comparison with other surgical methods. Moreover, lesser morbidity, short procedure time and absence of postoperative rehabilitation requirement can be considered as advantages of this method.Keywords: Biodegradable balloon, rotator cuff rupture, shoulder functio

Chronic Granulomatous Disease in a Boy Who Presented With Dactilitis Caused by Serratia Marcescens, Mimicking Rheumatic Monoarthritis in the Newborn Period: A Case Presentation

Chronic granulomatous disease (CGD) is a heterogenous genetic primary immune deficiency disorder, characterized by life-threatening infections and granulomas secondary to increased inflammatory responses. Most infections involve the lungs, skin, lymph nodes, and liver. Wedescribe a child diagnosed with CGD and the p67phox mutation presenting with Serratia marcescens arthritis without osteomyelitis in the newborn period

Pulmonary Embolism in Childhood: A Multicenter Experience from Turkey

Background: Pulmonary embolism is a clinical condition caused by the obstruction of the pulmonary artery and its branches with endogenous, exogenous embolism, or local thrombus formation. It is a rare but potentially life-threatening event in the pediatric population. Pediatric pulmonary embolism has many unknown characteristics.Aims: To evaluate clinical features, genetic and acquired risk factors, diagnostic imaging, and treatment strategies with long-term results in children with pulmonary embolism.Study Design: A retrospective multicenter clinical trialMethods: Patients aged 0-18 years who were diagnosed with pulmonary embolism with computed tomography pulmonary angiography (CTPA) findings (intraluminal filling defect in the lobar or main pulmonary artery) in 3 university hospitals between 2006 and 2021 were included in the study. A form was created for data standardization, and variables were collected retrospectively through medical record review. In addition to the features given above, we also evaluated in situ pulmonary artery thrombosis (ISPAT) and patients' Wells scores. Follow-up CTPA results were evaluated for patient response to treatment. Complete recovery means that there were no lesions, incomplete recovery if there was still embolism, and no response if there was no change.Results: Twenty-four patients (female:13, male:11) were included in the study. The mean age was 13.5 years. All patients but one had at least one or more genetic or acquired risk factors. Factor V Leiden mutation (16.6%) was the most common genetic risk factor. Six of 16 patients with Doppler ultrasonography were diagnosed with ISPAT because there was no sign of thromboembolic thrombosis. Nine (41.6%) patients had a Wells score of >4 (pulmonary embolism clinically strong), and 15 (58.4%) patients scored <4 (pulmonary embolism clinically likely weak), indicating that an alternative diagnosis was more likely than pulmonary embolism (sensitivity %37.5). The mean follow-up period was 23 (+/- 17) months. Complete and incomplete recovery was observed in 15 (62.5%) and 7 (29.1%) patients, respectively, among the patients who underwent follow-up evaluation. No response was obtained in 2 patients (8.3%) who died.Conclusion: The Wells scoring system seems insufficient to diagnose pulmonary embolism in children and should be improved by adding new parameters. ISPAT may be more common in children with congenital heart disease and systemic disease