Engineering the Surface Pattern of Microparticles: From Raspberry-like to Golf Ball-like

2021 ◽  
Author(s):  
Di Han ◽  
Dai-Lin Zhou ◽  
Qing-Yun Guo ◽  
Xiong Lin ◽  
Qin Zhang ◽  
...  
Keyword(s):  
Golf Ball ◽  
Surface Pattern

Inverse Opal Scaffolds with an Embossed Surface Pattern Prepared from Sticky Golf-Ball-Shaped Microparticle Assemblies

2015 ◽  
Vol 2 (12) ◽  
pp. 1500152 ◽  
Author(s):  
Sang Woo Kim ◽  
Kwan-Woo Lee ◽  
Sang-A Yi ◽  
Kuk Young Cho
Keyword(s):  
Golf Ball ◽  
Surface Pattern ◽  
Inverse Opal

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

Comparative Test on Performance of Golf Ball with Different Coefficient of Restitution and Ball Compression

2018 ◽  
Vol 27 (4) ◽  
pp. 1049-1057
Author(s):  
Kwang-Hyeuk Kim ◽  
Jae-Won Choi ◽  
In-Cheol Kang ◽  
Jae-Kil Han
Keyword(s):  
Coefficient Of Restitution ◽  
Comparative Test ◽  
Golf Ball

Total organic carbon and the preservation of organic-walled microfossils in Precambrian shale

Geology ◽  
2020 ◽  
Author(s):  
C.R. Woltz ◽  
S.M. Porter ◽  
H. Agić ◽  
C.M. Dehler ◽  
C.K. Junium ◽  
...  
Keyword(s):  
Species Richness ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Microbial Degradation ◽  
Sedimentation Rate ◽  
Surface Pattern ◽  
Causal Factors ◽  
Eukaryotic Diversity ◽  
High Concentrations ◽  
Fossil Preservation

Much of our understanding of early eukaryote diversity and paleoecology comes from the record of organic-walled microfossils in shale, yet the conditions controlling their preservation are not well understood. It has been suggested that high concentrations of total organic carbon (TOC) inhibit the preservation of organic fossils in shale, and although this idea is supported anecdotally, it has never been tested. Here we compared the presence, preservational quality, and assemblage diversity of organic-walled microfossils to TOC concentrations of 346 shale samples that span the late Paleoproterozoic to middle Neoproterozoic in age. We found that fossil-bearing samples have significantly lower median TOC values (0.32 wt%, n = 189) than those containing no fossils (0.72 wt%, n = 157). Preservational quality, measured by the loss of surface pattern, density of pitting, and deterioration of wall margin, decreases as TOC increases. Species richness negatively correlates with TOC within the ca. 750 Ma Chuar Group (Arizona, USA), but no relationship is observed in other units. These results support the hypothesis that high TOC content either decreases the preservational quality or inhibits the preservation of organic-walled microfossils altogether. However, it is also possible that other causal factors, including sedimentation rate and microbial degradation, account for the correlation between fossil preservation and TOC. We expect that as TOC varies in space and time, so too does the probability of finding well-preserved fossils. A compilation of 13,940 TOC values spanning Earth history suggests significantly higher median TOC levels in Mesoproterozoic versus Neoproterozoic shale, potentially biasing the interpreted pattern of increased eukaryotic diversity in the Tonian.

scholarly journals Strengthening the PSO algorithm with a new technique inspired by the golf game and solving the complex engineering problem

2021 ◽  
Author(s):  
Serkan Dereli ◽  
Raşit Köker
Keyword(s):  
Pso Algorithm ◽  
Engineering Problem ◽  
Golf Ball ◽  
New Technique ◽  
Successful Implementation ◽  
Robot Arm ◽  
Bee Colony ◽  
Scientific World ◽  
Heuristic Technique ◽  
A New Technique

AbstractThis study has been inspired by golf ball movements during the game to improve particle swarm optimization. Because, all movements from the first to the last move of the golf ball are the moves made by the player to win the game. Winning this game is also a result of successful implementation of the desired moves. Therefore, the movements of the golf ball are also an optimization, and this has a meaning in the scientific world. In this sense, the movements of the particles in the PSO algorithm have been associated with the movements of the golf ball in the game. Thus, the velocities of the particles have converted to parabolically descending structure as they approach the target. Based on this feature, this meta-heuristic technique is called RDV (random descending velocity) IW PSO. In this way, the result obtained is improved thousands of times with very small movements. For the application of the proposed new technique, the inverse kinematics calculation of the 7-joint robot arm has been performed and the obtained results have been compared with the traditional PSO, some IW techniques, artificial bee colony, firefly algorithm and quantum PSO.

scholarly journals Efecto inmediato de la auto-liberación miofascial en la superficie plantar sobre la musculatura isquiosural en futbolistas

2019 ◽  
Vol 8 (2) ◽  
pp. 89-95
Author(s):  
JM Barradas Romero ◽  
S. Gómez-Torres ◽  
A. Montero-Duarte ◽  
R. Bogas-Arrebola ◽  
R. Chacón-Cuberos
Keyword(s):  
Plantar Fascia ◽  
The Self ◽  
Golf Ball ◽  
Control Group ◽  
Hamstring Muscle ◽  
Myofascial Release ◽  
Experimental Type ◽  
Experimental Group

Las adherencias en ciertas zonas musculares generan tensiones en otras musculaturas de la misma cadena muscular. El objetivo del estudio es probar el efecto inmediato de la “Auto-liberación Miofascial” (SMR) con la técnica de pelota de golf en la fascia plantar en deportistas federados de “Fútbol 11” (FU) y “Fútbol Sala” (FS) y su incidencia sobre la musculatura isquiosural. Además, se analizó las diferencias entre cada modalidad. El diseño es de tipo experimental longitudinal, con una muestra de 20 deportistas federados. Los resultados muestran una mejora en la longitud alcanzada en el “Test Sit and Reach” (SRT) de forma significativa la SMR entre “Grupo Control” (GC) y “Grupo Experimental” (GE). Entre modalidades no se aprecian diferencias significativas. Se concluye que existe un efecto inmediato de la SMR con la técnica de pelota de golf en la fascia plantar sobre la musculatura isquiosural. No existiendo diferencias significativas entre modalidades. Adhesions in certain muscle areas generate tension in other muscles of the same muscle chain. The aim of the study is to test the immediate effect of the “Self-myofascial release” (SMR) with the golf ball technique on the plantar fascia in federated sportsmen of "Football 11" (FU) and "Futsal" (FS) and its influence on hamstring musculature. Besides, the differences between each modality have been analysed. The design is of the longitudinal experimental type, with a sample of 20 federated sportsmen. The results show significant improvement in the length reached in the “Sit and Reach Test” (SRT) after the SMR between "Control Group" (GC) and "Experimental Group"(GE). There are no significant differences between modalities. It is therefore concluded that there is an immediate effect of SMR with the golf ball technique on the plantar fascia over the hamstring muscle. There are no significant differences between modalities.

Supplementary descriptions of Pergalumna amamiensis Aoki, 1984 (Acariformes, Galumnoidea) from Ryukyu Islands

Zootaxa ◽  
2019 ◽  
Vol 4647 (1) ◽  
pp. 378-384
Author(s):  
WATARU HAGINO ◽  
SATOSHI SHIMANO
Keyword(s):  
Body Length ◽  
Morphological Traits ◽  
Granular Structure ◽  
Surface Pattern ◽  
Ryukyu Islands ◽  
Body Width ◽  
Okinawa Island ◽  
Ishigaki Island ◽  
Circular Surface ◽  
Median Pore

A species of oribatid mites, Pergalumna amamiensis was collected from Amami-Ohshima Island, Ishigaki Island, and Okinawa Island, Southwestern Japan. The specimens were studied in detail, and supplementary descriptions are provided; these include features of the rostrum, the subcapitulum and the surface pattern of pteromorphs. The main morphological traits for this species are summarized as follows; body length 519–570 μm, body width 363–410 μm, rostral tip pointed, sensillus with a long stalk covered by minute barbs, porose areas Aa bulbous, porose areas A1, A2, and A3 circular, surface of pteromorphs ornamented by fine granular structure and dense wrinkles, fine granular structure on prodorsum, subcapitulum, genital plates and anal plates, median pore on the notogaster represented as single pore. 

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