The trajectory of the impacting asteroid is another issue of considerable debate and still unresolved. Historically, circular plan views of impact craters confounded many investigators who assumed a circular crater requires a vertical impact. They wondered why more craters are not elliptical. Gilbert and Barringer both realized that 45° impacts are the most probable trajectories for meteoritic ...

frothers havea profoundeffectonbubble size and also flotation efficiency. in present study the effect of type and dosage of frothers on the flotation response of coarse particles of quartz was investigated.  therefore, flotation response of coarse particles using frothers such as mibc, pine oil, poly propylene glycol with concentration of 0, 25, 50 and 75 g/t, was obtained respectively. for all...

Background and Objective: COVID-19 has enforced high burden on health systems universally. To better allocate limited health equipment, we aimed to investigate the prognostic impacts of laboratory parameters. Materials and Methods: All SARS-CoV-2 patients admitted to Imam-Reza University Hospital, Mashhad, Iran, during three COVID19 peak periods in Iran (March to April 2020, July to August, an...

spinal epidural haemorrhage may present as back pain associated with radicular symptoms and can be a catastrophic clinical scenario with progression to paraplegia or even sudden death. being a rare entity, it needs a high index ofclinical suspicion to diagnose it. fractures have been documented as a cause of hematorrachis but such hematomas only extend to one or two vertebral segments. large ep...

One of the key design issues in ad hoc networks is the development of rollback recovery model for providing faulttolerance in MANET. Because the potential problem of MANET is limited energy, probability of fault occurrences is more. Hence, checkpointing is done at trusted nodes when faults are encountered, for successful rollback to the last saved state. This makes trust a vital factor to be de...

Once upon a time, Play Your Cards Right was popular Australian and British TV game show. For this issue of Significance we're revisiting the game.

As digitization makes customer migration easier and more attractive, managing customer recovery becomes increasingly important for organizations. In this context, the challenge is to avoid two error types that can occur with customer relation recovery. First, mistakenly investing in customer relations that are active (“alive”), and, second, mistakenly not investing in migrated customer relation...

background: septic intracranial venous thrombosis is a rare vascular disease of the brain with no specific sign or symptom. while urgent treatment will result in complete recovery, delays may cause permanent complications or even death. case report: the patient was a 23-year-old woman who had suffered visual loss, hallucination, and confusion two weeks after undergoing submandibular abscess rem...