An Entourage Approach to the Contraction Principle in Uniform Spaces Endowed with a Graph

In this paper, we study Banach contractions in uniform spaces endowed with a graph and give some sufficient conditions for a mapping to be a Picard operator. Our main results generalize some results of [J. Jachymski, "The contraction principle for mappings on a metric space with a graph", Proc. Amer. Math. Soc. 136 (2008) 1359-1373] employing the basic entourages of the uniform space.Comment: 20 page

On stationary points of nonexpansive set-valued mappings

In this paper we deal with stationary points (also known as endpoints) of nonexpansive set-valued mappings and show that the existence of such points under certain conditions follows as a consequence of the existence of approximate stationary sequences. In particular we provide abstract extensions of well-known fixed point theorems.Dirección General de Enseñanza SuperiorJunta de Andalucí

PCS The mass market for mobile communications

PCS - personal communications servicesAvailable from British Library Document Supply Centre-DSC:Vq97/05842 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

MAGNESIUM SULFATE EFFECTS ON POSTOPERATIVE PAIN AFTER CHOLECYSTECTOMY: A RANDOMIZED DOUBLE BLINDED CLINICAL TRIAL

Introduction. Postoperative pain is an unpleasant sensory and emotional experience. Control of this pain plays an important role in successful performance of surgical procedure. Magnesium sulfate has been proposed for postoperative analgesia. Methods. In a randomized, double blind clinical trial with two parallel groups, we assessed the analgesic effect of perioperative magnesium sulfate administration in 60 patients with ASA I or II undergoing cholecystectomy with general anesthesia. Patients received either magnesium sulfate 50 mg/kg preoperative and 8 mg/kg/h postoperative (as interventional group) or the same volume of isotonic sodium chloride solution (as placebo). Anesthesia was performed with thiopental of sodium, succinylcholine, atracurium and morphine, supplemented by nitrous oxide and halothane. Postoperative analgesia was achieved with morphine and evaluated using the pain visual analog scale for 24 h. Results. The mean pain score was lower, and morphine consumption was more less in the magnesium group (P<0.01). Discussion. Intravenous magnesium sulfate reduces postoperative pain and analgesic requirments in patients with cholecystectomy. Our results demonstrate that magnesium sulfate can be an adjuant to perioperative analgesic management

Investigating Awareness Amount of Nursing Students of Medical Sciences University of Bushehr about Ethic in Nursing Profession -2013

Background & aim: Nurses' ethical responsibility in practice and care is required to be aware of the principles of professional ethics. The aim of this study was to determine nursing students' knowledge of ethics in nursing of Bushehr University of Medical Sciences. Methods: In the present analytical-descriptive sectional study, in which the participants are 4-8 semester nursing students of Bushehr University of Medical Sciences. The research tools for collecting information were tow-section questionnaires consisting of demographic data and specialized questions about ethic and rules in the nursing profession. Data analysis was performed using the SPSS software by using independent t-tests and chi-square. Results: Total awareness of 4-8 semester nursing students about ethic and rules in nursing profession was intermediate (53.78 percent). There was a considerable relation between sexuality and satisfaction (p.436). A considerable relation between students' educational semester and satisfaction amount was not also not observed (p>.927). Conclusions: Students' awareness about professional ethic wasn't very desirable so it is suggested that by holding moral workshops in nursing or settling moral courses in nursing students curriculum will increase the amount of nursing students' awareness about nursing ethics

Polyacrylonitrile grafted cassava starch and its chemical modification with hydroxylamine hydrochloride

The graft copolymerization of acrylonitrile (AN) onto cassava starch (CS) with sodium bisulphite and potassium persulphate (KPS) as initiators was prepared. AN was grafted with gelatinized cassava at 70°C via redox method. The monomer ratios and reaction temperature were varied to obtain the maximum grafting efficiency and high grafted yield. The maximum grafting efficiency (91%) and grafted yield (93%) were attained at 50°C with ratio AN:CS 3:1 in 3 h. Poly(AN-grafted (g)-CS) was then modified with hydroxylamine hydrochloride (NH2OH.HCl) to convert the nitrile group into absorbing characteristic properties. The poly(AN-g-CS) and amidoxime-modified poly(AN-g-CS) were characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy, thermal gravimetric analysis (TGA) and Brauner-Emmet-Teller. The IR spectra proved that the grafting of AN onto CS was successful and the poly(AN-g-CS) was successfully modified with NH2OH.HCl. It was shown that the specific surface area, pore volume and average pore diameter of CS were increased from 54.75 m2.g–1, 245.39 m2.g–1,0.336cm3.g–1 to 0.843 cm3.g–1 and 3.95 nm to 13.02 nm, respectively. TGA analysis proved that poly(AN-g-CS) and amidoxime-modified poly(AN-g-CS) are thermally more stable compared to CS