Bipedal locomotion skills are challenging to develop. Control strategies often use local linearization of the dynamics in conjunction with reduced-order abstractions to yield tractable solutions. In these model-based control strategies, the controller is often not fully aware of many details, including torque limits, joint limits, and other non-linearities that are necessarily excluded from the...

Modern communication networks have become very complicated and highly dynamic, which makes them hard to model, predict and control. In this paper, we develop a novel experience-driven approach that can learn to well control a communication network from its own experience rather than an accurate mathematical model, just as a human learns a new skill (such as driving, swimming, etc). Specifically...

Diagnostic reference levels (DRLs) are difficult to define in the case of X-ray examinations involving fluoroscopy particularly those performed in angiography and interventional radiology due to the large variability between examinations: fluoroscopy duration, number of images, image quality required. In order to tackle this problem a nation-wide dosimetric survey was performed in Switzerland i...

Background: To suggest South India CT diagnostic reference levels (DRLs) by collecting radiation doses for the most commonly performed CT examinations. Materials and Methods: A pilot study investigated the most frequent CT examinations. 110 CT sites were asked to complete a survey booklet to allow the recording of CT parameters for each of 3 CT examinations during a 1 year time period. Dose...

Background: Intraoral radiographs are believed to deliver low doses to patients, thus little work has been done in this regards. Considering the increment in the number of patients reporting for the examination and the probability of delayed somatic effects for accumulated low doses of X-irradiation, it is expedient to determine the doses to three critical organs eye, thyroid and parotid that a...

We introduce the idea of Data Readiness Level (DRL) to measure the relative richness of data to answer specific questions often encountered by data scientists. We first approach the problem in its full generality explaining its desired mathematical properties and applications and then we propose and study two DRL metrics. Specifically, we define DRL as a function of at least four properties of ...

The concept of reference levels has had a long history in diagnostic imaging (1). In general, reference levels provide guidance regarding appropriate or conventional levels of radiation dose to be delivered to patients. In Europe, the concept has origins in the 1950s with x-ray examination surveys in the United Kingdom (2). In the United States, the use of reference levels began with “Nationwid...

OBJECTIVE To assess patient radiation doses during cerebral angiography and embolization of intracranial aneurysms in a large sample size from a single center. MATERIALS AND METHODS We studied a sample of 439 diagnostic and 149 therapeutic procedures for intracranial aneurysms in 480 patients (331 females, 149 males; median age, 57 years; range, 21-88 years), which were performed in 2012 with...

In the Drosophila embryo, a subset of muscles require expression and function of the RYK subfamily RTK gene derailed (drl) for correct attachment. We have isolated a second RYK homolog, doughnut (dnt), from Drosophila. The DNT protein exhibits 60% amino acid identity to DRL, and is structurally as similar to the mammalian RYK proteins as is DRL, indicating an ancient duplication event. dnt is e...

The assessment of radiation dose is an essential part in the optimisation process in diagnostic radiology. The concept of Diagnostic reference levels for x-ray investigations requires that radiation doses assessed can be compared between different x-ray departments. This study addresses the necessity for correcting average dose area product values due to patient size differences when assessing ...