Formation shape control for a collection of point agents is concerned with devising decentralized control laws which ensure that the formation will move so that certain interagent distances approximate prescribed values as closely as possible. Such laws are often derived using steepest descent of a potential function which is invariant under translation and rotation, and then critical formation...

The aim of vertical augmentation of the alveolar ridge is to restore resorbed alveolar ridges. This technique is critical to the placement of dental implants in a favorable position and the enhancement of restoration esthetics. The present report describes a technique for surgical preservation of the anterior maxillary process using maxillary bone from the surgical site and raising a soft tissu...

1 Department of Cell Biology, University Medical Centre Groningen, University of Groningen, 9713 AV Groningen, The Netherlands 2 Department of Anatomy and Neurosciences, Neuroscience Campus Amsterdam, VU University Medical Centre, 1007 MB Amsterdam, The Netherlands 3 Wellcome Trust Medical Research Council Stem Cell Institute and Department of Veterinary Medicine, University of Cambridge, Madin...

at least among some urban populations.7 A third hypothesis is based on the stages of an adolescent’s acquisition of lesbian or bisexual identity. “Heterosexual immersion” may be one strategy for responding to the identity confusion stage of development: “Some adolescents establish heterosexual involvements in hopes of ‘curing’ themselves of their homosexual interests....In some cases, an adoles...

A general introduction to artificial intelligence methods of measurement signal processing is given in Article 128, Nature and Scope of AI Techniques, Volume 2. In nature, evolution is mostly determined by natural selection or different individuals competing for resources in the environment. Those individuals that are better are more likely to survive and propagate their genetic material. The e...

Introduction: Retention of I-131 in the body of patients with differentiated thyroid carcinoma (DTC) has a direct effect on therapeutic outcome of radioiodine therapy. There are several factors that may influence retention time of radioiodine in the body of these patients. In this study we are going to assess effects of administered radioiodine activity, serum thyroid stimulati...

in this report, the clinical course and treatment response of 210 patients with grawes’ disease referred to the research institute for nuclear medicine were studied. the disease was more common in 3rd and 4th decades and more frequent in women (f/m=4). treatment response with antithyroid drugs was about 50%, whereas 80% of the patients treated by i-131 showed positive response. there was no mea...

in different regions, precipitation takes place with different persistencies and every persistency supplies a share of rainfall days and precipitation. therefore, the importance of rainfall persistence could be evaluated in all places. iran is located in mid-latitude of an arid region, in which the mean rainfall is 250 mm and it has dramatic tempo-spatial changes. rainfalls with short persisten...