Cooling of a Nanomechanical Resonator in the Presence of a Single Diatomic Molecule

We propose a theoretical scheme for coupling a nanomechanical resonator to a single diatomic molecule via microwave cavity mode of a driven LC resonator. We describe the diatomic molecule by a Morse potential and find the corresponding equations of motion of the hybrid system by using Fokker-Planck formalism. Analytical expressions for the effective frequency and the effective damping of the nanomechanical resonator are obtained. We analyze the ground state cooling of the nanomechanical resonator in presence of the diatomic molecule. The results confirm that presence of the molecule improves the cooling process of the mechanical resonator. Finally, the effect of molecule's parameters on the cooling mechanism is studied.Comment: 10 pages, 8 figure

Adaptation in Mothers of Educable Mentally Retarded Children

Background: Adaptation is an important process for humans. Children, who are physically or mentally disabled, impose special stresses on their families, parents and in particular on their mothers. Objectives: This study examines the relationship between the characteristics of mothers who have educable mentally retarded children, and their adaptation based on Roy’s adaptation model. Patients and Methods: This descriptive study was performed on 40 mothers of educable mentally retarded children referred to the single exceptional school in Aran va Bidgol City, Iran, during 2010 - 11. An adaptation questionnaire based on Roy’s adaptation model and demographic questionnaire were completed by the subjects. The results were analyzed using SPSS software version 16. Descriptive statistics and a Fisher’s exact test were used. Results: The overall adaptation of mothers was satisfactory. There was a significant relationship between the child’s birth order (P = 0.04) and the time of awareness of the child’s problem (P = 0.02), with adaptation levels in mothers who had a mentally retarded child. Conclusions: The child’s birth order and the time of awareness of the child’s problem were related to the mother’s adaptation level

Generating quantum discord between two distant Bose-Einstein condensates with Bell-like detection

We propose a technique that enables the creation of quantum discord between two distant nodes, each containing a cavity consist of the Bose-Einstein condensate, by applying a non-ideal Bell-like detection on the output modes of optical cavities. We find the covariance matrix of the system after the non-ideal Bell-like detection, showing explicitly that one enables manipulation of the quantum correlations, and particularly quantum discord, between remote Bose-Einstein condensates. We also find that the non-ideal Bell-like detection can create entanglement between distant Bose-Einstein condensates at the two remote site

Chemical Synthesis of Sub-micrometer- to Nanometer-sized of Antiferromagnetic Sr2CuO3 Ceramic

In summery, we describe the synthesis of the Sr2CuO3 particles from micro- to nano-meter by the modified sol–gel technique. It was demonstrated by SEM images that in samples prepared with low molar ratio of citric acid, nano -structure materials with small and tiny grains were obtained. The XRD result showed that the single phase of Sr2CuO3 sample without any impurity peak is formed at 950 degrees Celsius. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3476

Processing and performance of compounds based on emulsion/solution SBRs

Solution and emulstion SBRs are both widely used in tire industry. But which method offers the industry the best solution

Novel precursors in preparation and characterization of nanosuperconductor YBa[2]Cu[3]O[7-y]

In order to prevent agglomeration of high temperature YBa2Cu3O7-x (YBCO) superconducting materials, the solid state processing method based on new and appropriate yttrium complex precursors that have high stability in air and compatibility in solution, was used without applying any surfactant. A new method of preparing yttrium precursors on the basis of coordination hydroxynaphthaldehydate, salicylaldehyde and acetylacetonate compounds has been suggested. These have been prepared by a reaction of yttrium acetate with three various coordination compounds for forming yttrium complex types. These techniques provide proper control on nanoparticles size distribution. The generated steric hindrance due to the structure of the novel precursors, acts like a protecting agent and prevents from agglomeration. We synthesized nanoparticles of a size about 30–50 nm with homogeneous grains distribution at high calcination temperature 920 °C. The maximum values of transition temperature into the superconducting state have been found to be Tc(0) = 84 K with a temperature interval of ∆T = 3 K for YBCO nanosuperconductor. The synthesized products were characterized by powder Xray diffraction, fourier transform infrared spectroscopy (FT-IR), transmission electron micrograph and scanning electronic microscopy. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2066

Quality Function Deployment: More Than a Design Tool

Purpose – This study investigates to what extent QFD can be used in quality improvement rather than design activities. Design/methodology/approach – A framework was developed for implementation of QFD as a quality improvement tool. A case study approach is used to test this framework, and quality issues were analyzed using the framework in a ceramic tile manufacturing company. Findings – The results showed considerable improvements in the critical quality characteristics identified and sales rates, demonstrating the potential of QFD to be used in assessing and prioritizing areas of improvement, and converting them into measurable process or product requirements. Research limitations/implications – One case study was completed. More studies would be beneficial to support current findings. Practical implications – This framework provides structured approach and guidelines for practitioners in adapting QFD for quality improvements in existing products or processes. Originality/value – This study proposes a new framework to use QFD in quality improvement activities, expanding its application areas. Moreover, the results of the literature study performed provide a valuable collection of practical QFD implementation examples. Keywords Quality function deployment (QFD), quality improvement, customer complaints, voice of customer (VOC), house of quality (HOQ)