Enhanced electrochemical performance of MoS/graphene nanosheet nanocomposites.

Molybdenum disulfide (MoS) is attractive as an anode material for next-generation batteries, because of its layered structure being favorable for the insertion/deinsertion of Li ions, and its fairly high theoretical capacity. However, since the MoS anode material has exhibited disadvantages, such as low electrical conductivity and poor cycling stability, to improve the electrochemical performance of MoS in this study, a nanocomposite structure consisting of MoS and GNS (MoS/GNS) as an anode for LIBs was prepared, by controlling the weight ratios of MoS/GNS. The X-ray diffraction patterns and electron microscopic analysis showed that the nanocomposite electrode structure consisted of well-formed MoS nanoparticles and GNS.

Role of polyvinylpyrrolidone in the electrochemical performance of LiMnO cathode for lithium-ion batteries.

While LiMnO as an over-lithiated layered oxide (OLO) shows a significantly high reversible capacity of 250 mA h g in lithium-ion batteries (LIBs), it has critical issues of poor cycling performance and deteriorated high rate performance. In this study, modified OLO cathode materials for improved LIB performance were obtained by heating the as-prepared OLO at different temperatures (400, 500, and 600 °C) in the presence of polyvinylpyrrolidone (PVP) under an N atmosphere. Compared to the as-prepared OLO, the OLO sample heated at 500 °C with PVP exhibited a high initial discharge capacity of 206 mA h g and high rate capability of 111 mA h g at 100 mA g.

TiO-coated LiCoO electrodes fabricated by a sputtering deposition method for lithium-ion batteries with enhanced electrochemical performance.

We fabricated lithium cobalt oxide (LiCoO, LCO) electrodes in the absence and presence of TiO layers as cathodes for lithium-ion batteries (LIBs) using a sputtering deposition method under an Ar atmosphere. In particular, TiO coating layers on sputtered LCO electrodes were directly deposited in a layer-by-layer form with varying TiO sputtering times from 60 to 120 s. These sputtered electrodes were heated at 600 °C in an air atmosphere for 3 h.

The effects of functional electrical stimulation on muscle tone and stiffness of stroke patients.

[Purpose] The purpose of this study was to determine the effects of functional electrical stimulation on muscle tone and stiffness in stroke patients. [Subjects and Methods] Ten patients who had suffered from stroke were recruited. The intervention was functional electrical stimulation on ankle dorsiflexor muscle (tibialis anterior).

Effects of trunk stability exercise using proprioceptive neuromuscular facilitation with changes in chair height on the gait of patients who had a stroke.

[Purpose] The purpose of this study was to identify the effects of trunk stability exercise using proprioceptive neuromuscular facilitation with changes in chair heights on the gait of stroke patients. [Subjects and Methods] The subjects of this study were 11 stroke patients. The intervention method was trunk stability exercise using proprioceptive neuromuscular facilitation with different chair heights (50, 60, and 70 cm).

Effects of oculo-motor exercise, functional electrical stimulation and proprioceptive neuromuscular stimulation on visual perception of spatial neglect patients.

[Purpose] The purpose of this study was to identify the effects of oculo-motor exercise, functional electrical stimulation (FES), and proprioceptive neuromuscular facilitation (PNF) on the visual perception of spatial neglect patients. [Subjects and Methods] The subjects were randomly allocated to 3 groups: an oculo-motor exercise (OME) group, a FES with oculo-motor exercise (FOME) group, and a PNF with oculo-motor exercise (POME) group. The line bisection test (LBT), motor free visual test (MVPT), and Catherine Bergego Scale (CBS) were used to measure visual perception.

The immediate effect of PNF pattern on muscle tone and muscle stiffness in chronic stroke patient.

[Purpose] The purpose of this study was to investigate the immediate effect of proprioceptive neuromuscular facilitation on muscle tone and muscle stiffness in stroke patients. [ Subjects and Methods] The subjects consisted of 15 patients with chronic stroke (stroke group) and 15 healthy persons (healthy group). We measured the effects of proprioceptive neuromuscular facilitation intervention on the lower extremity using a muscle tone measurement device; this detected changes in muscle tone and stiffness in the lower extremity muscles.

Effect of whole-body vibration exercise in a sitting position prior to therapy on muscle tone and upper extremity function in stroke patients.

[Purpose] The purpose of this study was to determine the effect of whole-body vibration exercise in a sitting position prior to therapy in stroke patients. [Subjects and Methods] Fourteen chronic stroke patients were included in this study. Prior to occupational therapy, whole-body exercise was performed for 10 minutes, 5 times per week, for a total of 8 weeks.

Effects of ankle plantar flexors stretching with closed kinetic chain on pelvic movements and gait speed in hemiplegia patients: a case study.

[Purpose] The purpose of this study was to identify the effects of ankle plantar flexors stretching with closed kinetic chain (CKC) in hemiplegia patients. [Methods] This study used a reversal design (A-B-A') for a stroke with hemiplagia. The intervention program consisted of 30 min sessions, once a day, for 15 days.

The effect of implant shape and bone preparation on primary stability.

Purpose: The purpose of this study was to evaluate the effects of implant shape and bone preparation on the primary stability of the implants using resonance frequency analysis.

Methods: Sixty bovine rib blocks were used for soft and hard bone models. Each rib block received two types of dental implant fixtures; a straight-screw type and tapered-screw type.