the objective of present research was to design, evaluate and compare drug release from two different dosage forms in pulsatile drug delivery system (dds) for metoprolol tartarate (mt) as tablet and capsule. pulsatile systems are gaining a lot of interest as they deliver the drug at the right site of action at the right time and in the right amount, thus providing spatial and temporal delivery ...

A portable metalorganic gas delivery system designed and constructed to interface with an existing molecular beam epitaxy chamber at beamline 33-ID-E of the Advanced Photon Source is described. This system offers the ability to perform in situ X-ray measurements of complex oxide growth via hybrid molecular beam epitaxy. The performance of the hybrid molecular beam epitaxy system while deliverin...

PURPOSE The curative potential of external beam radiation therapy is critically dependent on having the ability to accurately aim radiation beams at intended targets while avoiding surrounding healthy tissues. However, existing technologies are incapable of real-time, volumetric, soft-tissue imaging during radiation beam delivery, when accurate target tracking is most critical. The authors addr...

In this work, the machine dynamic response in Selective Laser Sintering is investigated with the purpose of determining the causes of scanning errors. Machine subcomponents are rst investigated to determine their potential eeects on the laser beam positional accuracy. The dynamics of the laser beam delivery system are identiied as the major contributor to deviations in the laser beam position. ...

"Burst-mode" modulated arc therapy (hereafter referred to as "mARC") is a form of volumetric-modulated arc therapy characterized by variable gantry rotation speed, static MLCs while the radiation beam is on, and MLC repositioning while the beam is off. We present our clinical experience with the planning techniques and plan quality assurance measurements of mARC delivery. Clinical mARC plans fo...

In 2010 a campaign for the reduction and preservation of low vertical emittance at the ESRF electron storage ring was undertaken: values between 20 and 30 pm have been dramatically reduced to 3.5 pm, even during beam delivery. This improvement is the result of an increased measurement precision provided by the recently upgraded beam position monitoring system, a new correction algorithm, a larg...

since hospitals are an important and integral part of the overall health delivery system, this study was carried out to measure the effectiveness of this institution within the system. the records of 633 hospitalized patients in the pediatrics ward of ghaem hospital in mashhad during 1357 (21 march 1978-20 march 1979) has been consulted. more than half of the patients were hospitalized with the...

Given the extremely small beam sizes required at the interaction point (IP) of the next generation of linear colliders, it has long been understood that particular attention must be made to component stability, in particularly with respect to ground motion and vibration. The beam deliver systems (BDS) contain some of the most tightest alignment tolerances of the entire machine. There have been ...