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Approximate Conserved Quantities of Conservative Dynamical Systems in R 3
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Ünal C.M. KhaliqueApproximate generalized symmetries associated with the resonances of conservative dynamical systems in R 3 have been discussed. It has been shown that an approximate first integral (conserved quantities) can be found from the knowledge of two conservative approximate symmetries. Furthermore,... -
Approximate First Integrals of a Chaotic Hamiltonian System
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Ünal C.M. Khalique G.F. AlişverişçiApproximate first integrals (conserved quantities) of a Hamiltonian dynamical system with two-degrees of freedom which arises in the modeling of galaxy have been obtained based on the approximate Noether symmetries for the resonance ω 1 = ω 2. Furthermore, Kolmogorov-Arnold-Moser... -
Imaging phaeochromocytoma
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Janse P van Rensburg --- Division of Radiodiagnosis, Department of Medical Imaging and Clinical Oncology, Faculty of Health Sciences, South AfricaThe phaeochromocytoma (pheochromocytoma) is a hormonally active tumour of neuroendocrine origin. This article reviews the embryology, anatomy, nomenclature and pathology as it relates to the imaging of phaeochromocytomas and paragangliomas. The imaging findings and the role of different imaging modalities... -
Utility of neuroimaging in postpartum headache work-up: case report and diagnostic considerations
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: VV Ajith --- Department of Anaesthesiology, India N Shetty --- Department of Anaesthesiology, India C Paul --- Department of Anaesthesiology, India P Reddy --- Department of Anaesthesiology, IndiaA postpartum headache is commonly seen in clinical practice, especially after a subarachnoid block. Generally, it is treated as a postdural puncture headache. We report on a case of a 24-year-old primigravida who underwent emergency Caesarean delivery under spinal anaesthesia... -
Imaging in gynaecological oncology follow-up
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: B R Howard --- Department of Obstetrics and Gynaecology, Gynaecology Oncology Unit, R P Soeters --- Department of Obstetrics and Gynaecology, Gynaecology Oncology Unit,The early detection of a gynaecological cancer recurrence is important in order to institute early treatment. Numerous imaging techniques have been used to follow up patients after treatment of gynaecological malignancies. These include plain X-rays, ultrasound, CT scan, MRI scan... -
A retrospective analysis comparing clinical staging with magnetic resonance imaging staging in patients with cervical cancer
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: J Sauer --- Division of Radiation Oncology, Department of Medical Imaging and Clinical Oncology, H M Simonds --- Division of Radiation Oncology, Department of Medical Imaging and Clinical Oncology, H Van der Merwe --- Division of Radiation Oncology, Department of Medical Imaging and Clinical Oncology, S M Hattingh --- Division of Radiation Oncology, Department of Medical Imaging and Clinical Oncology,This single-institution retrospective study compares the accuracy of clinical and magnetic resonance imaging (MRI) staging of cervical cancer. For patients who underwent surgery, MRI and clinical staging were compared to final pathological stage. Pathological stage was utilised as the reference... -
Degradation of paracetamol and other constituents in Perfalgan®
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Catherine Curran --- Department of Anaesthesia, South AfricaBackground: The manufacturers of Perfalgan®, a formulation of intravenous paracetamol, recommend that each ampoule be used once only. This is most likely due to concerns regarding degradation of paracetamol or other ingredients in the solution, and sterility issues. However, in... -
Anaesthesia in the MRI suite
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Reinier Swart --- Department of Anaesthesiology, University of the Free State, South Africa William Ian Duncombe Rae --- Discipline of Medical Radiation Sciences, AustraliaAnaesthesia in the magnetic resonance imaging (MRI) suite, or when performing surgery that requires MRI guidance, is becoming a more frequent and complex procedure for anaesthetists, as the study modality is increasing in application. MRI is not inert in its... -
Embodied resilience: A phenomenological perspective
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Eric Elbers --- , the Netherlands Vivianne Baur --- , the Netherlands Babet te Winkel --- , the Netherlands Joachim Duyndam --- , the NetherlandsBackground: From a phenomenological perspective, our body is the “from-which” we face the world. Vice versa, our body is affected by occurrences in our surroundings. Embodied resilience is understood as a quality of the dynamic relationships between our affected body...