This paper studies interference alignment scheme and minimum mean square error (MMSE) improvement in Internet of Things (IoT)-oriented cognitive systems, where IoT devices share the licensed spectrum by cognitive radio in spectrum underlay. Target to manage the inter-tier interference caused by cognitive spectrum sharing as well as ensure an MMSE at receivers, the interference alignment algorit...

conclusions a small diaphragmatic tear due to blunt trauma to the abdomen is difficult to diagnosis in acute settings due to ragged margins and possibly no herniated contents and usually present with a delayed complication. therefore a careful examination of the entire traumatized area is the best approach in treating delayed presentation of traumatic diaphragmatic hernia prior to development o...

trauma and stressor related disorders include disorders in which exposure to a traumatic or stressful event is listed explicitly as a diagnostic criterion. these include reactive attachment disorder, posttraumatic stress disorder (ptsd), acute stress disorder, and adjustment disorders. psychological distress following exposure to a traumatic or stressful event is quite variable. in some cases, ...

the incidence of microbial keratitis after intacs implantation is extremely low and channel infection has been infrequently reported. we present a 23-year-old woman with keratoconus of both eyes who underwent implantation of two intrastromal corneal ring segments (intacs, keravision, inc., fremont, ca, usa) in the right eye. after 2.5 months, the patient presented with decreased vision, inflamm...

background: undescended testis (udt) is the most common endocrine disorder in male children. delayed diagnosis and treatment of udt lead to complications such as infertility, malignancy and testis rotation. objective: the aim of this study was to evaluate the causes of delay in proper treatment of patients with undescended testis in our population. materials and methods: an observational, descr...

With the aging of society, osteoporotic thoracolumbar compression fracture is a concern. This fracture occurs occasionally; however, some cases progress to neural compromise due to delayed vertebral body collapse requiring surgery. Surgical treatment and postoperative care are difficult because of patients' serious comorbidities and poor bone quality, and hence, optimum treatment is not clear, ...