Analysis of serpentine coil with alternating flattened axis: An insight into performance enhancement of solar ponds

Solar Energy ◽  
2021 ◽  
Vol 217 ◽  
pp. 292-307
Author(s):  
H.R. Babaei ◽  
M. Khoshvaght-Aliabadi ◽  
S.H. Mazloumi
2021 ◽  
Author(s):  
Kartik Sau ◽  
Tamio Ikeshoji ◽  
Godwill Mbiti Kanyolo ◽  
Titus Masese

<b>Although the fascinatingly rich crystal chemistry of honeycomb layered oxides has been accredited as the propelling force behind their remarkable electrochemistry, the atomistic mechanisms surrounding their operations remain unexplored. Thus, herein, we present an extensive molecular dynamics study performed systematically using a refined set of inter-atomic potential parameters of <i>A</i><sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub> (where <i>A</i> = Li, Na, and K). We demonstrate the effectiveness of the Vashishta-Rahman form of the interatomic potential in reproducing various structural and transport properties of this promising class of materials and predict an exponential increase in cationic diffusion with larger interlayer distances. The simulations further demonstrate the correlation between broadened inter-layer (inter-slab) distances associated with the larger ionic radii of K and Na compared to Li and the enhanced cationic conduction exhibited in K<sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub> and Na<sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub> relative to Li<sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub>. Whence, our findings connect lower potential energy barriers, favourable cationic paths and wider bottleneck size along the cationic diffusion channel within frameworks (comprised of larger mobile cations) to the improved cationic diffusion experimentally observed in honeycomb layered oxides. Furthermore, we explicitly study the role of inter-layer distance and cationic size in cationic diffusion. Our theoretical studies reveal the dominance of inter-layer distance over cationic size, a crucial insight into the further performance enhancement of honeycomb layered oxides.</b><br>


2021 ◽  
Author(s):  
Kartik Sau ◽  
Tamio Ikeshoji ◽  
Godwill Mbiti Kanyolo ◽  
Titus Masese

<b>Although the fascinatingly rich crystal chemistry of honeycomb layered oxides has been accredited as the propelling force behind their remarkable electrochemistry, the atomistic mechanisms surrounding their operations remain unexplored. Thus, herein, we present an extensive molecular dynamics study performed systematically using a reliable set of inter-atomic potential parameters of </b><i>A</i><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> (where </b><i>A</i><b> = Li, Na, and K). We demonstrate the effectiveness of the Vashishta-Rahman form of the inter-atomic potential in reproducing various structural and transport properties of this promising class of materials and predict an exponential increase in cationic diffusion with larger inter-layer distances. The simulations demonstrate the correlation between broadened inter-layer (inter-slab) distances associated with the larger ionic radii of K and Na compared to Li and the enhanced cationic conduction exhibited in K</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> and Na</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> relative to Li</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b>. Whence, our findings connect lower potential energy barriers, favourable cationic paths and wider bottleneck size along the cationic diffusion channel within frameworks (comprised of larger mobile cations) to the improved cationic diffusion experimentally observed in honeycomb layered oxides. Furthermore, we elucidate the role of inter-layer distance and cationic size in cationic diffusion. Our theoretical studies reveal the dominance of inter-layer distance over cationic size, a crucial insight into the further performance enhancement of honeycomb layered oxides.</b><br>


2008 ◽  
Vol 22 (1) ◽  
pp. 90-108 ◽  
Author(s):  
Patsy Tremayne ◽  
Debra A. Ballinger

Ballroom dance has resurfaced worldwide as a highly popular competitive sport and might be added to Olympic medal competition for the 2012 London Games. This resurgence presents opportunities for sport psychologists to provide psychological-skills and performance-enhancement training for ballroom dancers at all competitive levels. Few sport psychologists have the personal experience, expertise, or an adequate knowledge base about the competitive-ballroom-dance environment to provide meaningful intervention strategies for participants. This article was developed to provide initial guidance for sport psychology professionals interested in working in this environment. An overview of the competitive-dance and ballroom-dance environment, strategies used by dance couples for enhanced mental preparation before and during dance competitions, and excerpts from an interview with an Australian championship-level couple provide readers insight into performance-enhancement strategies for DanceSport.


2021 ◽  
Vol 54 ◽  
pp. 202-207
Author(s):  
Shaofeng Deng ◽  
Xupo Liu ◽  
Xuyun Guo ◽  
Tonghui Zhao ◽  
Yun Lu ◽  
...  

2020 ◽  
Vol 4 (1) ◽  
pp. 1-10
Author(s):  
Jenna Hussey ◽  
Robert Weinberg ◽  
Arash Assar

Although antecedents of choking under pressure have been studied, prevention efforts have been somewhat inconsistent. Current choking-susceptibility criteria include trait anxiety (TA), self-consciousness (SC), and coping style. In the present case study, a college track-and-field athlete was self-identified as choking susceptible (CS), and a sport-specific mindfulness intervention to reduce levels of TA, SC, and alter coping to reduce choking susceptibility was implemented. The athlete identified as CS completed the 6-wk Mindful Sport Performance Enhancement (MSPE) program. Trait and state mindfulness were assessed throughout the program, with a follow-up 6 wk postintervention to gain further insight into the continuing effects of the mindfulness training. Visual analysis and quantitative and qualitative data demonstrated increases in mindfulness levels and changes in TA, SC, and coping, resulting in the participant’s failing to meet the choking-susceptibility criteria postintervention, indicating a reduced likelihood of choking in future performances. Enhanced mindfulness levels promoted greater awareness and acceptance, which may help counter the negative effects of stressful sport performances.


2019 ◽  
Vol 37 (1) ◽  
pp. 156-187 ◽  
Author(s):  
Rahul Kumar ◽  
Kanwarpreet Singh ◽  
Sanjiv Kumar Jain

Purpose The purpose of this paper is to examine the contribution of agile manufacturing (AM) initiatives in the Indian manufacturing industry and their influence on the business performance enhancement. Design/methodology/approach A survey questionnaire was designed to attain the research objectives. The variables included in the questionnaire were adapted from the elaborated literature review and validated through discussion held with practitioners, academicians and the industry experts. AM questionnaire was sent to approximately 500 randomly selected manufacturing organizations in the northern spectrum of India through e-mails and posts, out of which 154 usable responses were received. Findings The study identified that the Indian manufacturing industry has been reasonably successful in improving the business performance by implementing AM initiatives and has successfully reaped the benefits of AM implementation. Originality/value The present work develops an insight into the prevailing AM practices adopted by Indian manufacturing organizations. The study calculated the percent point score for each issue of AM initiative with respect to the Indian manufacturing industry and highlighted its impact on the enhancement of business performance.


2021 ◽  
Author(s):  
Kartik Sau ◽  
Tamio Ikeshoji ◽  
Godwill Mbiti Kanyolo ◽  
Titus Masese

<b>Although the fascinatingly rich crystal chemistry of honeycomb layered oxides has been accredited as the propelling force behind their remarkable electrochemistry, the atomistic mechanisms surrounding their operations remain unexplored. Thus, herein, we present an extensive molecular dynamics study performed systematically using a reliable set of inter-atomic potential parameters of </b><i>A</i><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> (where </b><i>A</i><b> = Li, Na, and K). We demonstrate the effectiveness of the Vashishta-Rahman form of the inter-atomic potential in reproducing various structural and transport properties of this promising class of materials and predict an exponential increase in cationic diffusion with larger inter-layer distances. The simulations demonstrate the correlation between broadened inter-layer (inter-slab) distances associated with the larger ionic radii of K and Na compared to Li and the enhanced cationic conduction exhibited in K</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> and Na</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> relative to Li</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b>. Whence, our findings connect lower potential energy barriers, favourable cationic paths and wider bottleneck size along the cationic diffusion channel within frameworks (comprised of larger mobile cations) to the improved cationic diffusion experimentally observed in honeycomb layered oxides. Furthermore, we elucidate the role of inter-layer distance and cationic size in cationic diffusion. Our theoretical studies reveal the dominance of inter-layer distance over cationic size, a crucial insight into the further performance enhancement of honeycomb layered oxides.</b><br>


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