The Effect of Music Therapy on the Sleep Quality of Patients with Heart Failure: The Miracle of Nature Music.

Background: Patients with heart failure experience poor sleep quality due to the nature of disease they suffer from. The aim of this study was to investigate the effect of music on the sleep quality of patients with heart failure. Materials and Methods: The present study is a randomized clinical trial, which was performed on 76 patients with heart failure, hospitalized in the cardiac ward of an educational hospital. These patients had obtained a score of 5 or higher on Pittsburgh's sleep quality index. The block randomization method was used to generate the allocation sequence. Thus, the number of subjects in each block was determined to be 4 people in 18 blocks. Intervention was collection of nature music played through headphones for 30 minutes over three nights, and at the end of the third night, the Pittsburgh's index was completed again by both groups. Data were analyzed using descriptive and inferential statistics. Results: After the intervention, the mean scores of mental quality of sleep (p = 0.007) and daily function disorders improved significantly in the intervention group (p = 0.025). Significant differences were seen between the mean scores of mental quality of sleep (p < 0.001), daily function disorders (p = 0.002), delay in falling asleep (p = 0.01), sleep disorders (p < 0.001), and use of sleeping pills (p < 0.001) before and after the intervention in the intervention group. Conclusions: Playing relaxing music like nature sounds and spending time in nature after discharge can improve the sleep quality and sense of relaxation in patients with heart failure. The implementation of such affordable and amusing interventions can be proposed by nurses in heart failure patients.

Integration of sharp silicon nitride tips into high-speed SU8 cantilevers in a batch fabrication process.

Employing polymer cantilevers has shown to outperform using their silicon or silicon nitride analogues concerning the imaging speed of atomic force microscopy (AFM) in tapping mode (intermittent contact mode with amplitude modulation) by up to one order of magnitude. However, tips of the cantilever made out of a polymer material do not meet the requirements for tip sharpness and durability. Combining the high imaging bandwidth of polymer cantilevers with making sharp and wear-resistant tips is essential for a future adoption of polymer cantilevers in routine AFM use. In this work, we have developed a batch fabrication process to integrate silicon nitride tips with an average tip radius of 9 ± 2 nm into high-speed SU8 cantilevers. Key aspects of the process are the mechanical anchoring of a moulded silicon nitride tip and a two-step release process. The fabrication recipe can be adjusted to any photo-processable polymer cantilever.

The effect of child-parent relationship therapy on social skills of Preschool Children: a semi-experimental study.

BACKGROUND AND OBJECTIVE: Playing games for children is an instinct needed for ensuring happiness, it is a language for communication and self-expression, and a way to learn new things. Therefore, the present study aimed at evaluating the effectiveness of child-parent relationship therapy (CPRT) on the social skills of preschool children. METHODS: An experimental study with a pretest-posttest design was conducted on 60 preschool children in Kordkuy City, Golestan Province, Iran in 2017 by using a simple random sampling method in both the experimental and control groups. Routine preschool education was performed in the control group and in the experimentalgroup it was done based on play therapy protocol in 10 sessions for 45-60 min. The social skills questionnaire authored by Gresham and Elliott was used as a data gathering tool. The data were analyzed by SPSS 16. FINDINGS: An analysis of variance (ANOVA) test showed a significant difference between the scores of the experimental and control groups, which suggests that the CPRT model, a short-term plan of parental play therapy, can improve social skills in preschool children (p = 0/001). CONCLUSION: Regarding the effectiveness of the CPRT, it is recommended that this method be used is an interactive-educational way in preschool centers of Iran.

Digitally controlled analog proportional-integral-derivative (PID) controller for high-speed scanning probe microscopy.

Nearly all scanning probe microscopes (SPMs) contain a feedback controller, which is used to move the scanner in the direction of the z-axis in order to maintain a constant setpoint based on the tip-sample interaction. The most frequently used feedback controller in SPMs is the proportional-integral (PI) controller. The bandwidth of the PI controller presents one of the speed limiting factors in high-speed SPMs, where higher bandwidths enable faster scanning speeds and higher imaging resolution. Most SPM systems use digital signal processor-based PI feedback controllers, which require analog-to-digital and digital-to-analog converters. These converters introduce additional feedback delays which limit the achievable imaging speed and resolution. In this paper, we present a digitally controlled analog proportional-integral-derivative (PID) controller. The controller implementation allows tunability of the PID gains over a large amplification and frequency range, while also providing precise control of the system and reproducibility of the gain parameters. By using the analog PID controller, we were able to perform successful atomic force microscopy imaging of a standard silicon calibration grating at line rates up to several kHz.

Design of a high-bandwidth tripod scanner for high speed atomic force microscopy.

Tip-scanning high-speed atomic force microscopes (HS-AFMs) have several advantages over their sample-scanning counterparts. Firstly, they can be used on samples of almost arbitrary size since the high imaging bandwidth of the system is immune to the added mass of the sample and its holder. Depending on their layouts, they also enable the use of several tip-scanning HS-AFMs in combination. However, the need for tracking the cantilever with the readout laser makes designing tip-scanning HS-AFMs difficult. This often results in a reduced resonance frequency of the HS-AFM scanner, or a complex and large set of precision flexures. Here, we present a compact, simple HS-AFM designed for integrating the self-sensing cantilever into the tip-scanning configuration, so that the difficulty of tracking small cantilever by laser beam is avoided. The position of cantilever is placed to the end of whole structure, hence making the optical viewing of the cantilever possible. As the core component of proposed system, a high bandwidth tripod scanner is designed, with a scan size of 5.8 µm × 5.8 µm and a vertical travel range of 5.9 µm. The hysteresis of the piezoactuators in X- and Y-axes are linearized using input shaping technique. To reduce in-plane crosstalk and vibration-related dynamics, we implement both filters and compensators on a field programmable analog array. Based on these, images with 512 × 256 pixels are successfully obtained at scan rates up to 1024 lines/s, corresponding to a 4 mm/stip velocity. SCANNING 38:889-900, 2016. © 2016 Wiley Periodicals, Inc.

Studying biological membranes with extended range high-speed atomic force microscopy.

High-speed atomic force microscopy has proven to be a valuable tool for the study of biomolecular systems at the nanoscale. Expanding its application to larger biological specimens such as membranes or cells has, however, proven difficult, often requiring fundamental changes in the AFM instrument. Here we show a way to utilize conventional AFM instrumentation with minor alterations to perform high-speed AFM imaging with a large scan range. Using a two-actuator design with adapted control systems, a 130 × 130 × 5 µm scanner with nearly 100 kHz open-loop small-signal Z-bandwidth is implemented. This allows for high-speed imaging of biologically relevant samples as well as high-speed measurements of nanomechanical surface properties. We demonstrate the system performance by real-time imaging of the effect of charged polymer nanoparticles on the integrity of lipid membranes at high imaging speeds and peak force tapping measurements at 32 kHz peak force rate.

Immunomodulatory properties of borage (Echium amoenum) on BALB/c mice infected with Leishmania major.

Leishmaniasis is caused by parasitic protozoa transmitted by the bite of a female sand fly and is currently endemic in 88 countries. BALB/c mice are highly susceptible to the infection with the parasite Leishmania major, and this susceptibility has been attributed, in part, to the expansion of Th2 cells, production of their cytokines, and downregulation of Th1 cytokine, interferon gamma (IFN-γ). In this report, we used both aqueous and alcoholic extracts of Iranian borage (Echium amoenum Fisch & C.A. Mey) for treatment of L. major infection in BALB/c mice. We found that both extracts had immunomodulatory properties and increased the level of IFN-γ and lowered the parasite burden in the proximal lymph nodes and prevented the necrosis of the footpad as compared with the untreated infected mice. These results may provide a basis for further studies directed toward the use of the Iranian borage against L. major infection.