ABSTRACT
We design and report an electrical circuit using a Josephson junction under periodic forcing that reveals extreme multistability. Its overall state equations surprisingly recall those of a well-known model of Josephson junction initially introduced in our circuit. The final circuit is characterized by the presence of two new and different current sources in parallel with the nonlinear internal current source sin[Ï(t)] of the Josephson junction single electronic component. Furthermore, the model presents an interesting extreme multistability which is justified by a very large number of different attractors (chaotic or not) when slightly changing the initial conditions.
ABSTRACT
Physicians should be aware of unusual presentations of syphilis. For dermatologists, the visual recognition of lesional morphology and distribution is a fundamental part of clinical evaluation, which dictates the workup and diagnosis. Secondary syphilis has a variety of presentations, the most common being a diffuse symmetrical papulosquamous eruption. It continues to be a diagnostic challenge as the myriad manifestations of secondary syphilis can mimic many dermatological disorders. Herein we report a case of secondary syphilis with an uncommon presentation characterized by disseminated annular and arcuate lesions.
Subject(s)
Syphilis, Cutaneous/diagnosis , Syphilis/diagnosis , Adult , Diagnosis, Differential , Humans , MaleSubject(s)
Humans , Checklist , Snacks , Street Food , Food Storage/standards , Cooking and Eating Utensils , Food Hygiene , TemperatureABSTRACT
Ophthalmoplegic migraine is a rare disorder characterized by childhood-onset ophthalmoplegia and migraine headaches. The third cranial nerve is commonly involved, while involvement of the sixth and fourth cranial nerves is uncommon. We present the case study of a 15-year-old female teenager whose condition was diagnosed with ophthalmoplegic migraine when she was 9 years old and since then has experienced multiple and recurrent attacks. Since the diagnosis, she has exhibited a persistent right-eye mydriasis, despite resolution of migrainous episodes. Pupillary involvement in ophthalmoplegic migraine is the rule in children, with total recovery in the majority of cases. We will discuss some aspects related to the eventual association between this entity and other comorbidities, such as Adie tonic pupil, emphasizing the fact that the underlying mechanisms of this residual mydriasis are not fully understood.
