550 research outputs found
PID controller turing to obtain desired closed-loop responses for casade control systems
No full textEffect of Creative Dance on Fitness, Functional Balance, and Mobility Control in the Elderly
No full textBackground: In the literature on creativity in older adults, creative activities have been found to be an effective way of adapting to age-related psychological and physical changes, providing older adults with opportunities to think differently and be open to new ideas. On the other hand, physical activities play an important role in the prevention of physical decline. Thus, combining physical activity and certain creative activities, such as creative dance (CD), might help facilitate successful aging. Since the National Dance Association has expanded dance into educational and community facilities, CD programs have begun to be developed and widely used for all ages. Objective: We investigated the effects of a CD program on fitness, functional balance, and mobility in the elderly. Methods: Eighty-two community-dwelling older adults were randomly allocated to either a dance group (n = 41, age = 70.5 +/- 7.89 years) or a stretching group (n = 41, age = 71.77 +/- 7.78 years). Over 8 weeks, these groups participated in CD and stretching training (ST) classes, respectively, which lasted for 90 min and were held 2 days a week. The CD included tasks to explore movement elements (i.e., body, space, time, force), develop their own movement, and transform feelings or inner experiences into movement. The ST included several upper- and lower-body stretching poses. The outcome measures included the Senior Fitness Test (SFT), Berg Balance Scale (BBS), Timed Up and Go Test (TUG), Dynamic Gait Index (DGI), and 10-Meter Walking Test (gait speed). Results: A significant group x time interaction was found for the 30-s stand and 30-s arm curl, and for the BBS, TUG, DGI, and gait speed. Post hoc paired t tests revealed significantly increased scores for the 30-s stand, 30-s arm curl, back stretching, and chair sit and reach tests, and for the TUG, BBS, TUG, DGI, and gait speed in the CD group. The 30-s arm curl and chair sit and reach test scores significantly increased in the ST group. Conclusion: CD and stretching may both benefit fitness and balance for older adults; however, CD may improve dynamic balance and mobility more than stretching. Therefore, CD may be a creative physical activity that contributes to successful aging.OAIID:RECH_ACHV_DSTSH_NO:T201918521RECH_ACHV_FG:RR00200001ADJUST_YN:EMP_ID:A078915CITE_RATE:3.353DEPT_NM:체육교육과EMAIL:[email protected]_YN:YN
Bicuculline-induced complexity reduction of spike trains in rat suprachiasmatic nucleus neurons in vitro
No full textThe suprachiasmatic nucleus (SCN) is the master biological clock in mammals. Despite the periodic mean firing rate, interspike interval (ISI) patterns of SCN neurons are quite complex and irregular. The aim of the present study was to investigate the role of neuronal interactions on the complex ISI patterns of SCN. neurons. ISI sequences were recorded from 56 neurons in rat hypothalamic slice preparations by using a cell-attached patch recording technique. Their correlation dimensions (D-2) were estimated and were then compared with those of randomly shuffled surrogate data. To see if the neuronal. coupling mediated by the gamma-aminobutyric acid (GABA), the major neurotransmitter in the SCN, contributed to the complex nature of the spikes, we examined the effect of the GABA(A) receptor antagonist bicuculline on the D-2 values of the neurons. Most SCN neurons exhibited decreased D-2 values after bicuculline application. This result suggests that the complex nature of the SCN neurons arises from GABA(A) receptor-mediated synaptic couplings.
Shell cross-linked hyaluronic acid/polylysine layer-by-layer polyelectrolyte microcapsules prepared by removal of reducible hyaluronic acid microgel cores
No full textShell cross-linked hollow polyelectrolyte microcapsules composed of hyaluronic acid (HA) and poly-L-lysine (PLL) were prepared by layer-by-layer (LBL) adsorption and subsequent core removal by a reductive agent. Disulfide cross-linked HA microgels were used as template core. materials for the LBL deposition on the surface and removed by treatment of dithiothreitol at neutral pH condition. HA/PLL polyelectrolyte multilayers on the shell were chemically cross-linked via carbodiimide chemistry, and their physicochemical properties and drug release behaviors were investigated. Shell cross-linked HA/PLL polyelectrolyte microcapsules exhibited far enhanced physical stability against freeze-thaw cycles and acidic pH conditions compared to the un-cross-linked ones. The cross-linked HA/PLL multilayer shell also demonstrated pH responsive permeability, which became more permeable at low pH than at,neutral pH. When bovine serum albumin (BSA), as a model protein drug, was loaded inside using the pH-dependent permeability, BSA release profiles from the microcapsules could be readily modulated by varying medium pH values or adding an HA digesting enzyme (hyaluronidase) in the incubation medium.National
Research Laboratory grant from the Ministry of Science and
Technology, Republic of Korea
A comparison of using the DSM-5 and MABC-2 for estimating the developmental coordination disorder prevalence in Korean children
No full textBackground: Previous literature has shown inconsistency in the prevalence of developmental coordination disorder (DCD). The Movement Assessment Battery for Children, Second Edition (MABC-2) is often used for DCD prevalence studies, although the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) recommends four criteria. Aims: The purpose of this study was to compare the prevalence of DCD in Korean children using the DSM-5 and MABC-2. Methods: A total of 548 Korean elementary school students (mean age: 8.5 years +/- 4.5 months) completed this study procedure. All four criteria defined by the DSM-5 were used to classify children with DCD. MABC-2 test scores were used to classify students into four subgroups: high risk DCD, mild-risk DCD, probable DCD and typical development. Results: Cohen's kappa revealed that the estimates of DCD prevalence were not significantly different between MABC-2 and DSM-5. When DSM-5 criteria were applied, 60 children out of 548 were classified as probable DCD (10.94%) compared to 70 children with probable DCD (12.77%) when MABC-2 was used. Conclusions: DCD prevalence based on DSM-5 is not significantly different from MABC-2, though it tends to estimate less than MABC-2. Future studies should consider our findings when selecting an assessment tool.OAIID:RECH_ACHV_DSTSH_NO:T201918519RECH_ACHV_FG:RR00200001ADJUST_YN:EMP_ID:A078915CITE_RATE:1.872DEPT_NM:체육교육과EMAIL:[email protected]_YN:YN
An insulating material in a structured host enables sustainable formation of a granular Li metal for highly durable Li metal battery
No full text© 2022 Elsevier B.V.For using Li metal anode, controlling Li metal morphology for long-term cycles is an essential requirement, but the porous Li metal easily form due to a dendritic Li growth. Here, we report on a novel strategy to reversibly form a granular Li metal by confining Li deposition sites and controlling the Li metal morphology via a structured functional host that is composed of small portion of a Li-alloying region and large portion of an insulating region. The insulating region confines the nucleation sites to the Li-alloying region because the nucleation cannot occur in the insulating region, and strongly affects the growth/morphology of the Li metal because the insulating particles mitigate the Li+ concentration around the Li-alloying particles. The persistent effects of the confinement and control of the Li metal morphology enable to sustainably form the granular Li metal. The Cu electrode with the functional host structure achieve Coulombic efficiency of >98% over 500 cycles, and can reversibly deposit Li metal with LiCoO2 cathode even in typical standard carbonate electrolytes. The findings reveal novel capabilities of insulating materials for sustainable use of Li and provide a new avenue for designing practical use of Li metal for durable Li metal batteries.11Nsciescopu
sj-docx-1-cqx-10.1177_19389655231223359 – Supplemental material for When Does (Mis)Fit Between Customer Service Orientation and Internal Service Qualities Matter for Frontline Employees’ Pride in Membership and Their Behaviors?
No full textSupplemental material, sj-docx-1-cqx-10.1177_19389655231223359 for When Does (Mis)Fit Between Customer Service Orientation and Internal Service Qualities Matter for Frontline Employees’ Pride in Membership and Their Behaviors? by Martin Yongho Hyun, Lisa Gao, Seoki Lee and Hyeon-Cheol Kim in Cornell Hospitality Quarterly</p
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