Numerical and experimental analysis of initial water impact of an air-dropped REMUS AUV by Roe, Stephen Michael

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A drop-in-concept for deep borehole canister emplacement by Bates, Ethan Allen

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Lean Design of Alternative Packaging Cushion Material for Glass Bottles using Rice Husk and Coconut Fibre by Mohamad, Mahmod Abd Hakim, Nurfarahin Onn, Nurfarahin Onn, Abdul Halim, Muhammad Akmal, Yahya, Mohd Shahir, Mohd Haidzir, Nurul Amalina Farhanah, Ibrahim, Md Zin

“…The impact performances of cushions from different compositions are conducted using the Drop Tester Model AD-100 Design Series 4410 based on the Standard ASTM D 5276 (Drop Test of Loaded Containers by Free Fall 1998). Model 2 (50% RH 50% CF) gave the best performance in the capability to withstand the impact at a fixed height of 92 cm in the drop test compared to Model 1 (100% RH 0% CF) and Model 3 (0% RH 100% CF). …”
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The Administration of the New Pyrimidine Derivative—4-{2-[2-(3,4-Dimethoxyphenyl)-Vinyl]-6-Ethyl-4-Oxo-5-Phenyl-4H-Pyrimidine-1-Il}Benzsulfamide Restores the Activity of Brain Cell... by Dmitry I. Pozdnyakov, Kirill A. Miroshnichenko, Andey V. Voronkov, Tat’yana G. Kovaleva

“…<i>Materials and methods:</i> The study was performed on male mice of the BALB/c line (acute toxicity was assessed) and male rats of the Wistar line, which were modeled chronic traumatic encephalopathy by the method of free fall of the load (weight 150 g from a 50 cm height). …”
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NEURODESTRUCTION OF HYPOTHALAMIC NUCLEI IN BRAIN INJURY. EFFECT OF CARBACETAM by S.V. Ziablitsev, T.I. Panova, O.O. Starodubska

“…To simulate the BI, rats were subjected to one stroke along the cranial vault with a free-fall load according to the V.N. Yelskyy and S.V. …”
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Rockfall fragmentation upon slope impact based on discrete element simulation by Jian HUANG, Jingqing YUAN, Tan ZENG, Jianhong LIAO, Xiang HUANG, Hao WANG

“…Methods To study the crushing process of rockfalls and the influence of slope geometry characteristics on the movement of rockfall blocks, discrete element method (PFC2D) simulation technology was used to establish a rockfall free-fall-impact model to analysethe rock mass structure and slope geometry characteristics of typical rockfall disaster points. …”
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The scars of COVID19: Preparing for the collateral damages by Ruby Dhar, Babban Jee, Karthikeyan Pethusamy, Ashikh Seethy, Arun Kumar, Subhradip Karmakar

“…With a global shutdown in business and financial institutions, the economy is in free fall. Markets plummeted, stocks crashed and unemployment numbers skyrocketed. …”
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Effects of Stroboscopic Vision on Depth Jump Motor Control: A Biomechanical Analysis by Kenneth D. Harrison, Christopher J. Dakin, Anne Z. Beethe, Talin Louder

“…Researchers commonly use the ‘free-fall’ paradigm to investigate motor control during landing impacts, particularly in drop landings and depth jumps (DJ). …”
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The Onset of Thermally Unstable Cooling from the Hot Atmospheres of Giant Galaxies in Clusters: Constraints on Feedback Models by Hogan, M. T., McNamara, B. R., Pulido, F. A., Nulsen, P. E. J., Vantyghem, A. N., Russell, H. R., Edge, A. C., Babyk, Iu., Main, R. A., McDonald, Michael A.

“…We investigate the effects of local gravitational acceleration in central cluster galaxies, and explore the role of the local free-fall time (tff) in thermally unstable cooling. …”
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Fluid dynamics of sinking carbon dioxide hydrate particle releases for direct ocean carbon sequestration by Chow, Aaron C. (Aaron Chunghin), 1978-

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Direct Measurements of Turbulence in the Upper Western Pacific North Equatorial Current over a 25-h Period by Wenlong Yang, Hui Zhou, Yonggang Wang, Juan Liu, Hengchang Liu, Chenglong Liu, William Dewar

“…Measurements of the turbulent kinetic energy dissipation rate (<i>ε</i>) were conducted by a free-fall microstructure profiler in the western Pacific North Equatorial Current (WPNEC) during a continuous period of 25 h, from the sea surface to about 160 m depth. …”
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Collagen-chitosan scaffold impregnated with bone marrow mesenchymal stem cells for treatment of traumatic brain injury by Feng Yan, Ming Li, Hong-Qi Zhang, Gui-Lin Li, Yang Hua, Ying Shen, Xun-Ming Ji, Chuan-Jie Wu, Hong An, Ming Ren

“…A traumatic brain injury rat model was established using the 300 g weight free fall impact method. Bone marrow mesenchymal stem cells/collagen-chitosan scaffolds were implanted into the injured brain. …”
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Seismic monitoring of small alpine rockfalls – validity, precision and limitations by M. Dietze, S. Mohadjer, J. M. Turowski, T. A. Ehlers, N. Hovius

“…The onset of individual events can be determined within a few milliseconds, and their dynamics can be resolved into distinct phases, such as detachment, free fall, intermittent impact, fragmentation, arrival at the talus slope and subsequent slope activity. …”
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Analysis of the Objective Internal Load in Portuguese Skydivers in the First Jump of the Day by Tiago Machado, João Serrano, Jose Pino-Ortega, Paulo Silveira, Antonio Antúnez, Sergio José Ibáñez

“…The most experienced parachutists recorded the highest HR at the moment of landing and the least experienced at the moment of free fall.…”
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Precise aftershock distribution of the 2019 Yamagata-oki earthquake using newly developed simple anchored-buoy ocean bottom seismometers and land seismic stations by Masanao Shinohara, Shin’ichi Sakai, Tomomi Okada, Hiroshi Sato, Yusuke Yamashita, Ryota Hino, Kimihiro Mochizuki, Takeshi Akuhara

“…It is difficult to perform aftershock observation using ordinary free-fall pop-up type ocean bottom seismometers (OBSs). …”
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Critical Role of Somatosensation in Postural Control Following Spaceflight: Vestibularly Deficient Astronauts Are Not Able to Maintain Upright Stance During Compromised Somatosensa... by Recep A. Ozdemir, Rahul Goel, Millard F. Reschke, Scott J. Wood, William H. Paloski

“…The free-fall of orbital spaceflight effectively removes the gravitational vector used as a primary spatial orientation reference on Earth. …”
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Characteristics of rockfall trajectory and hazard assessment in western Hubei Province: A case study of the Wapo collapse area in Yuan’an County by Wei HUANG, Dong AI, Shenghua HU, Huiyuan XU, Lei KOU, Bao ZHOU, Jingjing YUAN, Dongsheng XIA

“…The research results showed that the main failure form of the dangerous rock was the toppling, and it was in an under-stable state at present; the three-dimensional motion trajectory of the simulated rockfall basically coincided with the existing rockfall point which indicating the simulation results were in good agreement with the actual situation; The mode of motion of the rocks were collision, bounce and free fall. Rockfalls were mainly concentrated in the gullies and roads but a few rocks reached residential areas. …”
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To What Extent Can a Sediment Yield Model Be Trusted? A Case Study from the Passaúna Catchment, Brazil by Klajdi Sotiri, Stephan Hilgert, Matheus Duraes, Robson André Armindo, Nils Wolf, Mauricio Bergamini Scheer, Regina Kishi, Kian Pakzad, Stephan Fuchs

“…For the assessment of sediment stock in the reservoir, the commercial free-fall penetrometer GraviProbe (GP) was used, while the calculation of sediment yield was calculated by combining a revised universal soil loss equation (RUSLE)-based model with a sediment delivery ratio model based on the connectivity approach. …”
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The Black Hole Universe, Part II by Enrique Gaztanaga

“…Here, we propose that such Black Hole Universe (together with smaller primordial Black Holes) could form from the hierarchical free-fall collapse of regular matter. We argue that the singularity could be avoided with a Big Bounce explosion, which results from neutron degeneracy pressure (Pauli exclusion principle). …”
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Effects of the impact angle on the coefficient of restitution in rockfall analysis based on a medium-scale laboratory test by Y. Wang, W. Jiang, W. Jiang, S. Cheng, P. Song, C. Mao

“…To investigate whether the existing conclusion based on small-scale laboratory tests is valid when the test scale changes as well as the role of rotation in the effect of the impact angle on the coefficients of restitution, this study performed a medium-scale laboratory test using spherical limestone polyhedrons to impact concrete slabs. Free-fall tests are conducted, and the velocities before and after the impact are obtained by a 3-D motion capture system. …”
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