Observation tests of the Antarctic penetrator on the Mizuho Plateau in JARE-43 summer operation by Takeshi Matsushima, Mikiya Yamashita, Tatsuji Yasuhara, Koh Horiguchi, Hiroki Miyamachi, Shigeru Toda, Masamitsu Takada, Atsushi Watanabe, Kazuo Shibuya

“…These data are not only useful for development of the Antarctic penetrator, but also for development of touchdown-type physical observation equipment for use in Antarctica.…”
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A hierarchical vision-based localization of rotor unmanned aerial vehicles for autonomous landing by Haiwen Yuan, Changshi Xiao, Supu Xiu, Wenqiang Zhan, Zhenyi Ye, Fan Zhang, Chunhui Zhou, Yuanqiao Wen, Qiliang Li

“…In such a hierarchical framework, the landing is defined into three phases: “Approaching,”“Adjustment,” and “Touchdown,” in which visual artificial features at different scales can be detected from the designed object pattern for unmanned aerial vehicle pose recovery. …”
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β-Glucan synthase gene overexpression and β-glucans overproduction in Pleurotus ostreatus using promoter swapping. by Ran Chai, Cuiwei Qiu, Dongren Liu, Yuancheng Qi, Yuqian Gao, Jinwen Shen, Liyou Qiu

“…The homologous recombination fragment for swapping GLS promoter comprised five segments, which were fused by two rounds of combined touchdown PCR and overlap extension PCR (TD-OE PCR), and was introduced into P. ostreatus through PEG/CaCl2-mediated protoplast transformation. …”
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The expression of selected genes encoding enterotoxins in Staphylococcus aureus strains by Lukáš Valihrach, Kateřina Demnerová, Renata Karpíšková, Ivana Melenová

“…First, a method for the detection of genes encoding enterotoxins was established and then a method for the determination of the expression of these genes was optimised, using a range of the PCR techniques (multiplex, touchdown and real-time). The expression of staphylococcal enterotoxin genes was evaluated both qualitatively and quantitatively. …”
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Step-to-step variations in human running reveal how humans run without falling by Nidhi Seethapathi, Manoj Srinivasan

“…Deviations in the center of mass motion predict the corrective strategies during the next stance, well in advance of foot touchdown. Horizontal motion is stabilized by total leg impulse modulations, whereas the vertical motion is stabilized by differentially modulating the impulse within stance. …”
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An Experimental Investigation on the Dynamic Response of Buried RC Pipes Induced by Falling Impact by Yingkang Yao, Nan Jiang, Guopeng Lyu, Jinshan Sun, Feng Yang

“…Considering the purpose of the test, the falling process of the concrete ball and the surface vibration velocity induced by the touchdown of the concrete ball were monitored using a high-speed camera and a vibration signal tester, respectively. …”
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Experimental Verification of Passive Axial Electrodynamic Suspension in a Bearingless Motor by GUILHERME CAVALCANTE RUBIO, VISHNU C. HOTHUR KOMAL, YUSUKE FUJII, AKIRA CHIBA

“…This method sets the middle point between upper and lower touchdown positions in the same place where the motor current is minimum during passive axial suspension. …”
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Running impact forces: from half a leg to holistic understanding – comment on Nigg et al. by Kenneth P. Clark, Andrew B. Udofa, Laurence J. Ryan, Peter G. Weyand

“…Several studies demonstrate that the vertical ground reaction force-time (vGRFT) impulse, from touchdown to toe-off, corresponds to the instantaneous accelerations of the body’s entire mass (Mb) divided into two or more portions. …”
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A Preliminary Assessment of an FBG-Based Hard Landing Monitoring System by Angela Brindisi, Cristian Vendittozzi, Lidia Travascio, Luigi Di Palma, Michele Ignarra, Vincenzo Fiorillo, Antonio Concilio

“…The proposed preliminary methodology is the base for assessing a more complex procedure to correlate structural response to the energy entering the structure during the touchdown event.…”
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Robust Autoland Design by Multi-Model H∞ Synthesis with a Focus on the Flare Phase by Jean-Marc Biannic, Clément Roos

“…More precisely, the objective is to control the vertical speed of the aircraft before touchdown while minimizing the impact of windshear, ground effects, and airspeed variations. …”
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Multi-Scale Interaction between a Squall Line and a Supercell and Its Impact on the Genesis of the “0612” Gaoyou Tornado by Jiajia Tang, Xiaowen Tang, Fen Xu, Fugui Zhang

“…As the squall line entered its mature stage with the formation of a well-organized bow echo, the supercell in front of the bow echo began to rapidly intensify and finally led to the tornado touchdown. The analysis of mesoscale and storm-scale wind fields indicated that the bow echo of the approaching squall line modified the kinematic fields near the supercell in such a way that was favorable for the intensification of the supercell. …”
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Three-dimensional walking of a simulated muscle-driven quadruped robot with neuromorphic two-level central pattern generators by Yasushi Habu, Keiichiro Uta, Yasuhiro Fukuoka

“…For each leg, we use a two-level central pattern generator consisting of a rhythm generation part to produce basic rhythms and a pattern formation part to synergistically activate a different set of muscles in each of the four sequential phases (swing, touchdown, stance, and liftoff). Conventionally, it was difficult for a quadruped model with such realistic neural systems and muscle-driven leg mechanisms to walk even on flat terrain, but because of our improved neural and mechanical components, our quadruped model succeeds in reproducing motoneuron activations and leg trajectories similar to those in cats and achieves stable three-dimensional locomotion at a variety of speeds. …”
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Optimization of PCR amplification of maize microsatellite loci by Ogliari Juliana Bernardi, Boscariol Raquel L., Camargo Luis E.A.

“…A major problem, however, is that the primers used in their amplification often have different length and nucleic acid content, requiring optimization of PCR amplification programs for each locus. We developed "touchdown" PCR programs successfully used in the amplification of a set of 125-maize microsatellite loci, chosen as representative of all chromosomes. …”
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Bumblebees perform well-controlled landings in dim light by Therese Reber, Marie Dacke, Eric Warrant, Emily Baird

“…To make a smooth touchdown when landing, an insect must be able to reliably control its approach speed as well as its body and leg position – behaviors that are thought to be regulated primarily by visual information. …”
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Biological Efficacy of Herbicides for Weed Control in Noncropped Areas by Tsvetanka Dimitrova

“…It was found that treatment of noncropped areas (stubbles) with the total systemic herbicides Touchdown System 4 (360 g/l glyphosate); Cosmic (360 g/l glyphosate); Roundup Plus (441 g/l glyphosate potassium salt); Leon 36 SL (360 g/l glyphosate) and Glyphos Super 45 SL (450 g/l glyphosate) was highly efficient, so that it was a successful element of a strategy for controlling weeds of different biological groups, and was especially effective against perennial weeds.…”
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Evidence toads may modulate landing preparation without predicting impact time by S. M. Cox, Gary Gillis

“…Further, toads align forelimbs with the instantaneous velocity vector well before landing and then track its changes until touchdown. This suggests that toads may be prepared to land well before they hit the ground rather than preparing for impact at a specific moment, and that they may use a motor control strategy that allows them to perform controlled landings without the need to predict impact time.…”
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Online Optimal Landing Control of the MIT Mini Cheetah by Jeon, Se Hwan, Kim, Sangbae, Kim, Donghyun

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Modelling of an asteroid photoelectron sheath and implications for a sample return mission by Aplin, K, Macfaden, A, Bowles, N

“…The high electron concentration near the surface is likely to ensure that the spacecraft and surface potential are similar at touchdown, in the absence of other charging effects, such as those introduced by the sampling mechanism. …”

On the dynamics of a thin viscous film spreading between a permeable horizontal plate and an elastic sheet by Box, F, Neufeld, J, Woods, A

“…With a very light or stiff elastic sheet, this touchdown point may extend far beyond the fluid draining zone, but otherwise it is similar to the extent of the draining zone.…”

Cross-species microsatellite amplification of river terrapin (Batagur affinis) by Ismail, Nurul Aini, Ab Ghani, Nurul Izza, Ismail, Ahmad

“…B. trivittata and Podocnemis unifilis) were screened and optimised for 30 samples of river terrapin from Kemaman, Terengganu using touchdown protocol and followed by gradient protocol. …”
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