Log in

Relevant bibliographies by topics / Space Tug / Journal articles

Journal articles on the topic 'Space Tug'

To see the other types of publications on this topic, follow the link: Space Tug.

Author: Grafiati

Published: 14 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Space Tug.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Fabacher, Emilien, Stéphanie Lizy-Destrez, Daniel Alazard, Finn Ankersen, and Alexandre Profizi. "Guidance of magnetic space tug." Advances in Space Research 60, no. 1 (July 2017): 14–27. http://dx.doi.org/10.1016/j.asr.2017.03.042.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Fabacher, Emilien, Daniel Alazard, Finn Ankersen, Stéphanie Lizy-Destrez, and Léonore de Mijolla. "Control of Magnetic Space Tug." IFAC-PapersOnLine 49, no. 17 (2016): 278–83. http://dx.doi.org/10.1016/j.ifacol.2016.09.048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Cresto Aleina, Sara, Nicole Viola, Fabrizio Stesina, Maria Antonietta Viscio, and Simona Ferraris. "Reusable space tug concept and mission." Acta Astronautica 128 (November 2016): 21–32. http://dx.doi.org/10.1016/j.actaastro.2016.07.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Aslanov, Vladimir, and Vadim Yudintsev. "Dynamics of large space debris removal using tethered space tug." Acta Astronautica 91 (October 2013): 149–56. http://dx.doi.org/10.1016/j.actaastro.2013.05.020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Kang, Junjie, and Zheng H. Zhu. "De-Spin of Massive Rotating Space Object by Tethered Space Tug." Journal of Guidance, Control, and Dynamics 41, no. 11 (November 2018): 2463–69. http://dx.doi.org/10.2514/1.g003584.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Lim, Jonghyuk, and Jintai Chung. "Dynamic Analysis of a Tethered Space-tug System." Transactions of the Korean Society for Noise and Vibration Engineering 28, no. 1 (February 28, 2018): 83–91. http://dx.doi.org/10.5050/ksnve.2018.28.1.083.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Cui, Ting Ting, Han Bin Xiao, and Jin Shan Dai. "Design the Information System of the Locating and Tracking Harbor Tug Based on the Web." Advanced Materials Research 468-471 (February 2012): 816–20. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.816.

Full text

Abstract:

In order to manage the tug better, efficiently and securely dispatch tug operation, and meet the real-time property, accuracy requirements, the GPS chip of embedding RFID for locating and tracking would be used. Through the wireless Radio Frequency technology and Ethernet, it can complete conveying information between tug and harbor dispatching room, then structure the tug locating and tracking information system. It can real-timely acquire and monitor the tug parameter of position, desired track, operating condition and so on. According to that, it makes real-time dispatching. Efficiently achieve the management in harbor pass, operation and assignments all the time and space.

APA, Harvard, Vancouver, ISO, and other styles

8

Qi, Rui, Arun K. Misra, and Zongyu Zuo. "Active Debris Removal Using Double-Tethered Space-Tug System." Journal of Guidance, Control, and Dynamics 40, no. 3 (March 2017): 722–30. http://dx.doi.org/10.2514/1.g000699.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zhang, Jingrui, Keying Yang, and Rui Qi. "Dynamics and offset control of tethered space-tug system." Acta Astronautica 142 (January 2018): 232–52. http://dx.doi.org/10.1016/j.actaastro.2017.10.020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Zhong, Rui, and Zheng H. Zhu. "Timescale Separate Optimal Control of Tethered Space-Tug Systems for Space-Debris Removal." Journal of Guidance, Control, and Dynamics 39, no. 11 (November 2016): 2540–45. http://dx.doi.org/10.2514/1.g001867.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Estima, Ana Eduarda Marques Seixas, Bruna Motta Taulois Dutra, José Vicente Pereira Martins, and Ana Cristina Oliveira Bruno Franzoi. "Validation of the “Life Space Assessment - LSA” Questionnaire in a group of hemiplegic patients." Acta Fisiátrica 22, no. 1 (March 9, 2015): 1–4. http://dx.doi.org/10.11606/issn.2317-0190.v22i1a103880.

Full text

Abstract:

The mobility of a hemiplegic patient is an interaction between their functional ability and external factors. The “Life Space Assessment” (LSA) questionnaire is a tool that assesses their mobility on 5 levels. Objective: To validate the LSA in a population of stroke survivors in physical therapy at a rehabilitation center, correlating it with measures of physical performance. Method: Instruments used in concurrent validation: Timed Up and Go Test (TUG), Postural Assessment Scale (PASS), Rivermead Mobility Index. Statistics: Descriptive, Spearman Index and Intra Class Correlation (ICC). Results: Thirty hemiplegic patients were assessed (73% male, mean age 58.6 years, mean time since injury 1.9 years). The LSA correlated significantly (p < 0.01) with age, TUG, PASS, and Rivermead. Inter-rater agreement: ICC 0.941 Intra-rater agreement 0.981. Conclusion: The LSA was valid in a population of chronic stroke survivors, with excellent intra and inter-rater correlation measures, correlating significantly with measurements of body structure, function, and motor activities (TUG, PASS, and Rivermead).

APA, Harvard, Vancouver, ISO, and other styles

12

Lau, Sandra, Frerk Mueller von Aschwege, Tania Zieschang, Juergen Bauer, Andreas Hein, and Rebecca Diekmann. "Activity Space and Functional Outcomes in Frail Older Persons Using GPS analysis." Innovation in Aging 5, Supplement_1 (December 1, 2021): 514. http://dx.doi.org/10.1093/geroni/igab046.1989.

Full text

Abstract:

Abstract With increasing age, walking becomes a main functional ability to participate in activities of daily living and supports independence and mobility. Frailty in older, multimorbid patients has a negative impact on physical activity and may reduce the personal activity space (AS). In this pilot study, GPS data were used to identify walking tracks to define individual AS and to compare functional performance in frail older persons. GPS data of 20 community-dwelling adults (84.5(±5.2)years, 85% women, mean frailty phenotype 1.9 (70% ≥2)points) were analyzed using a customized software to assess individual AS over a ten-months period. A geriatric home assessment including Short Physical Performance Battery (SPPB), gait speed (GS) and Timed-up-and-Go (TUG) was conducted monthly. GPS analysis revealed three different walking types presenting AS similarities: Type A walkers prefer smaller short walks nearby the home while Type B can be characterized by taking larger regular walks. Type C presents the widest AS using different transportation modes, but only a moderate number of walks. Mean group difference in functional performance of Type A walkers showed significantly reduced GS (0.45(±0.1)m/s), TUG (23.4s(±4.9)) and SPPB scores (3.8(±0.8) points; p<0.05) compared to Type C (0.82(±0.1)m/s (GS); 13.2(±1.4)s (TUG); 7.0(±1.3) points (SPPB)). Functional performance of Type B walkers (0.63(±0.2)m/s (GS); 17.1(±4.4)s (TUG); 6.5(±2.4)points (SPPB)) revealed significantly higher SPPB scores compared to Type A (p<0.05). Walks and individual AS can be mapped via GPS under everyday conditions. High heterogeneity within frail older people was observed. Persons with lower functional performance showed a reduced AS and physical activity.

APA, Harvard, Vancouver, ISO, and other styles

13

Liu, Jiafu, Naigang Cui, Fan Shen, and Siyuan Rong. "Dynamics of the Space Tug System with a Short Tether." International Journal of Aerospace Engineering 2015 (2015): 1–16. http://dx.doi.org/10.1155/2015/740253.

Full text

Abstract:

The dynamics of the space tug system with a short tether similar to the ROGER system during deorbiting is presented. The kinematical characteristic of this system is significantly different from the traditional tethered system as the tether is tensional and tensionless alternately during the deorbiting process. The dynamics obtained based on the methods for the traditional tethered system is not suitable for the space tug system. Therefore, a novel method for deriving dynamics for the deorbiting system similar to the ROGER system is proposed by adopting the orbital coordinates of the two spacecraft and the Euler angles of ROGER spacecraft as the generalized coordinates instead of in- and out-plane librations and the length of the tether and so forth. Then, the librations of the system are equivalently obtained using the orbital positions of the two spacecraft. At last, the geostationary orbit (GEO) and the orbit whose apogee is 300 km above GEO are chosen as the initial and target orbits, respectively, to perform the numerical simulations. The simulation results indicate that the dynamics can describe the characteristic of the tether-net system conveniently and accurately, and the deorbiting results are deeply affected by the initial conditions and parameters.

APA, Harvard, Vancouver, ISO, and other styles

14

Mammarella, Martina, Pietro M. Vernicari, Christopher A. Paissoni, and Nicole Viola. "How the Lunar Space Tug can support the cislunar station." Acta Astronautica 154 (January 2019): 181–94. http://dx.doi.org/10.1016/j.actaastro.2018.04.032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

RAO, Haiping, Rui ZHONG, and Pengjie LI. "Fuel-optimal deorbit scheme of space debris using tethered space-tug based on pseudospectral method." Chinese Journal of Aeronautics 34, no. 9 (September 2021): 210–23. http://dx.doi.org/10.1016/j.cja.2020.12.020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Aslanov, Vladimir S., and Vadim V. Yudintsev. "Dynamics of Large Debris Connected to Space Tug by a Tether." Journal of Guidance, Control, and Dynamics 36, no. 6 (November 2013): 1654–60. http://dx.doi.org/10.2514/1.60976.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Mantellato, R., L. Olivieri, and E. C. Lorenzini. "Study of dynamical stability of tethered systems during space tug maneuvers." Acta Astronautica 138 (September 2017): 559–69. http://dx.doi.org/10.1016/j.actaastro.2016.12.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Tchelet, Keren, Alit Stark-Inbar, and Ziv Yekutieli. "Pilot Study of the EncephaLog Smartphone Application for Gait Analysis." Sensors 19, no. 23 (November 26, 2019): 5179. http://dx.doi.org/10.3390/s19235179.

Full text

Abstract:

Gait disorders and falls are common in elders and in many clinical conditions, yet they are typically infrequently and subjectively evaluated, limiting prevention and intervention. Completion-time of the Timed-Up-and-Go (TUG) test is a well-accepted clinical biomarker for rating mobility and prediction of falls risk. Using smartphones’ integral accelerometers and gyroscopes, we already demonstrated that TUG completion-time can be accurately measured via a smartphone app. Here we present an extended app, EncephaLogTM, which provides gait analysis in much more detail, offering 9 additional gait biomarkers on top of the TUG completion-time. In this pilot, four healthy adults participated in a total of 32 TUG tests; simultaneously recorded by EncephaLog and motion sensor devices used in movement labs: motion capture cameras (MCC), pressure mat; and/or wearable sensors. Results show high agreement between EncephaLog biomarkers and those measured by the other devices. These preliminary results suggest that EncephaLog can provide an accurate, yet simpler, instrumented TUG (iTUG) platform than existing alternatives, offering a solution for clinics that cannot afford the cost or space required for a dedicated motion lab and for monitoring patients at their homes. Further research on a larger study population with pathologies is required to assess full validity.

APA, Harvard, Vancouver, ISO, and other styles

19

Aslanov, V. S., and V. V. Yudintsev. "THE DYNAMICS OF TOWAGE BY THE ELASTIC ROPE IN A GRAVITATIONLESS SPACE." Vestnik of Samara University. Natural Science Series 19, no. 3 (June 1, 2017): 58–66. http://dx.doi.org/10.18287/2541-7525-2013-19-3-58-66.

Full text

Abstract:

The dynamics of the rigid body connected with the space tug by the elastic rope in a gravitationless space is considered. The equations of motion are derived from a Lagrange formalism. The influence of initial conditions on the rigid body behaviour is studied. The posibility of existence of critical behaviour of movement which can cause the entanglement of rope is shown.

APA, Harvard, Vancouver, ISO, and other styles

20

Aslanov, Vladimir, and Vadim Yudintsev. "Motion Control of Space Tug During Debris Removal by a Coulomb Force." Journal of Guidance, Control, and Dynamics 41, no. 7 (July 2018): 1476–84. http://dx.doi.org/10.2514/1.g003251.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Sun, Xin, and Rui Zhong. "Libration Control for the Low-Thrust Space Tug System Using Electrodynamic Force." Journal of Guidance, Control, and Dynamics 41, no. 7 (July 2018): 1602–9. http://dx.doi.org/10.2514/1.g003375.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Sun, Xin, and Rui Zhong. "Switched propulsion force libration control for the low-thrust space tug system." Aerospace Science and Technology 80 (September 2018): 281–87. http://dx.doi.org/10.1016/j.ast.2018.07.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Погудин, Андрей Владимирович. "МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ ЭЛЕКТРОНАГРЕВНОГО ДВИГАТЕЛЯ НА ЭТАПЕ ЗАПУСКА." Aerospace technic and technology, no. 5 (October 22, 2019): 4–11. http://dx.doi.org/10.32620/aktt.2019.5.01.

Full text

Abstract:

The subject of research in the article is the process of accelerating the working fluid in an electric heating thruster, which is part of the onboard propulsion system used in space tug. The goal is to obtain the characteristics of starting an electric heating thruster, which is part of an onboard propulsion system used in space tug, as a function of time, to further evaluate the preparation time of an onboard propulsion system for operation and approximating its temporal characteristics to chemical rocket engines. Tasks: the formation of the pneumohydraulic diagram of the onboard propulsion system, the structure of the onboard propulsion system, the creation of a mathematical model of the electric heating thruster, the determination of the functioning area of the electric heating thruster, which is part of the onboard propulsion system and the launch characteristics. The method used is: simulation of processes occurring at start-up in an electric heating thruster, which is part of an onboard propulsion system used in space tug. The following results were obtained: the range of limitations of the static dependence of the thrust of the electric heating thruster, which is part of the onboard propulsion system, on the flow rate of the working fluid in the heater power range was determined; dependences on the thrust time of the electric heating thruster, the flow rate of the working fluid of the electric heating thruster, and the power consumed by the electric heating thruster during the start-up process are obtained; as a result of the optimization of the coefficients of the controller of the electric heating thruster, the transfer function was obtained. The scientific novelty of the results consists in assessing the dynamic properties of an electric heating thruster, which is part of an onboard propulsion system mounted on a space tug, obtained in the field of limiting the thrust of an electric heating thruster, the flow rate of the working fluid of an electric heating thruster, the power of an electric heater of an engine, and the transfer function of a regulator of an electric heating thruster, which is part of onboard propulsion system.

APA, Harvard, Vancouver, ISO, and other styles

24

Arnadottir, Solveig A., and Vicki S. Mercer. "Effects of Footwear on Measurements of Balance and Gait in Women Between the Ages of 65 and 93 Years." Physical Therapy 80, no. 1 (January 1, 2000): 17–27. http://dx.doi.org/10.1093/ptj/80.1.17.

Full text

Abstract:

Abstract Background and Purpose. Footwear is not consistently standardized in the administration of the Functional Reach Test (FRT), Timed Up & Go Test (TUG), and 10-Meter Walk Test (TMW). This study was conducted to determine whether footwear affected performance on these tests in older women. Subjects. Thirty-five women, aged 65 to 93 years, were recruited from assisted living facilities and retirement communities. Methods. Each subject performed the FRT, TUG, and TMW while wearing walking shoes, wearing dress shoes, and barefooted. Because of space constraints at the facilities where the testing was performed, 22 subjects performed the FRT and TUG on a linoleum floor and 13 subjects performed the tests on a firm, low-pile, carpeted floor. All 35 subjects completed the TMW on a firm, low-pile, carpeted floor. One-way repeated-measures analyses of variance (ANOVAs) and a Tukey Honestly Significant Difference test were used to compare the outcomes for the 3 footwear conditions, with separate ANOVAs conducted for the different floor surfaces for the FRT and TUG. Results. Subjects performed better on the FRT when barefooted or wearing walking shoes compared with when they wore dress shoes, regardless of floor surface. Differences were found among all footwear conditions for the TUG performed on the linoleum floor and for the TMW. For these tests, the women moved fastest in walking shoes, slower barefooted, and slowest wearing dress shoes. Conclusion and Discussion. Footwear should be documented and should remain constant from one test occasion to another when the FRT, TUG, and TMW are used in the clinic and in research. Footwear intervention may improve performance of balance and gait tasks in older women.

APA, Harvard, Vancouver, ISO, and other styles

25

Kang, Junjie, Zheng H. Zhu, and Lucas F. Santaguida. "Analytical and Experimental Investigation of Stabilizing Rotating Uncooperative Target by Tethered Space Tug." IEEE Transactions on Aerospace and Electronic Systems 57, no. 4 (August 2021): 2426–37. http://dx.doi.org/10.1109/taes.2021.3061798.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

KANG, Junjie, Zheng H. ZHU, Wei WANG, Changqing WANG, and Aijun LI. "Dynamics and de-spin control of massive target by single tethered space tug." Chinese Journal of Aeronautics 32, no. 3 (March 2019): 653–59. http://dx.doi.org/10.1016/j.cja.2019.01.002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Wen, Hao, Zheng H. Zhu, Dongping Jin, and Haiyan Hu. "Constrained tension control of a tethered space-tug system with only length measurement." Acta Astronautica 119 (February 2016): 110–17. http://dx.doi.org/10.1016/j.actaastro.2015.11.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Zhong, Rui, and Zheng H. Zhu. "Attitude Stabilization of Tug–Towed Space Target by Thrust Regulation in Orbital Transfer." IEEE/ASME Transactions on Mechatronics 24, no. 1 (February 2019): 373–83. http://dx.doi.org/10.1109/tmech.2019.2892331.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Rimani, Jasmine, Christopher Andrea Paissoni, Nicole Viola, Giorgio Saccoccia, and Jose Gonzalez del Amo. "Multidisciplinary mission and system design tool for a reusable electric propulsion space tug." Acta Astronautica 175 (October 2020): 387–95. http://dx.doi.org/10.1016/j.actaastro.2020.05.045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Chu, Zhongyi, Jingnan Di, and Jing Cui. "Analysis of the effect of attachment point bias during large space debris removal using a tethered space tug." Acta Astronautica 139 (October 2017): 34–41. http://dx.doi.org/10.1016/j.actaastro.2017.06.028.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Dielacher, Andreas, Heinrich Fragner, and Otto Koudelka. "PRETTY – passive GNSS-Reflectometry for CubeSats." e & i Elektrotechnik und Informationstechnik 139, no. 1 (February 2022): 25–32. http://dx.doi.org/10.1007/s00502-022-00993-7.

Full text

Abstract:

AbstractThe Passive Reflectometry and Dosimetry (PRETTY) is a small satellite mission developed by a consortium consisting of RUAG Space GmbH (RSA), Graz University of Technology (TUG), and Seibersdorf Laboratories (SL). The primary objective of the passive altimetry within the PRETTY mission is to measure the ice and sea ice surface elevation and roughness in the polar regions.

APA, Harvard, Vancouver, ISO, and other styles

32

Smith, Eric S., Raymond J. Sedwick, John F. Merk, and Justin McClellan. "Assessing the Potential of a Laser-Ablation-Propelled Tug to Remove Large Space Debris." Journal of Spacecraft and Rockets 50, no. 6 (November 2013): 1268–76. http://dx.doi.org/10.2514/1.a32439.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Zhang, Zhiping, Zhiwei Yu, Qianwen Zhang, Ming Zeng, and Shunli Li. "Dynamics and control of a tethered space-tug system using Takagi-Sugeno fuzzy methods." Aerospace Science and Technology 87 (April 2019): 289–99. http://dx.doi.org/10.1016/j.ast.2019.02.033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Koshlakov, V. V., N. I. Arkhangelsky, and V. M. Nesterov. "Lunar Electric Propulsion Demonstrator Coupled with the Fregat Space Tug: An Experimental Mission Concept." Solar System Research 56, no. 7 (December 2022): 476–84. http://dx.doi.org/10.1134/s0038094622070127.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Shinoda, Narihide, Osamu Hirai, Shinya Hori, Kazuyuki Mikami, Toshiaki Bando, Daisuke Shimo, Takahiro Kuroyama, Yoji Kuramoto, Masato Matsumoto, and Yasushi Ueno. "Utility of MRI-based disproportionately enlarged subarachnoid space hydrocephalus scoring for predicting prognosis after surgery for idiopathic normal pressure hydrocephalus: clinical research." Journal of Neurosurgery 127, no. 6 (December 2017): 1436–42. http://dx.doi.org/10.3171/2016.9.jns161080.

Full text

Abstract:

OBJECTIVEThe presence of disproportionately enlarged subarachnoid space hydrocephalus (DESH) on brain imaging is a recognized finding of idiopathic normal pressure hydrocephalus (iNPH), but the features of DESH can vary across patients. The aim of this study was to evaluate the utility of MRI-based DESH scoring for predicting prognosis after surgery.METHODSIn this single-center, retrospective cohort study, the DESH score was determined by consensus between a group of neurosurgeons, neurologists, and a neuroradiologist based on the preoperative MRI findings of the patients with suspected iNPH. The DESH score was composed of the following 5 items, each scored from 0 to 2 (maximum score 10 points): ventriculomegaly, dilated sylvian fissures, tight high convexity, acute callosal angle, and focal sulcal dilation. The association between the DESH score and improvement of the scores on the modified Rankin Scale (mRS), iNPH Grading Scale (iNPHGS), Mini–Mental State Examination (MMSE), Trail Making Test-A (TMT-A), and Timed 3-Meter Up and Go Test (TUG-t) was examined. The primary end point was improvement in the mRS score at 1 year after surgery, and the secondary outcome measures were the iNPHGS, MMSE, TMT-A, and TUG-t scores at 1 year after surgery. Improvement was determined as improvement of 1 or more levels on mRS, ≥ 1 point on iNPHGS, ≥ 3 points on MMSE, a decrease of > 30% on TMT-A, and a decrease of > 10% on TUG-t.RESULTSThe mean DESH score for the 50 patients (mean age 77.6 ± 5.9 years) reviewed in this study was 5.58 ± 2.01. The mean rate of change in the mRS score was −0.50 ± 0.93, indicating an inverse correlation between the DESH score and rate of change in the mRS score (r = −0.749). Patients who showed no improvement in mRS score tended to have a low DESH score as well as low preoperative MMSE and TMT-A scores. There were no differences in the areas of deep white matter hyperintensity and periventricular hyperintensity on the images between patients with and without an improved mRS score (15.6% vs 16.7%, respectively; p = 1.000). The DESH score did differ significantly between patients with and without improved scores on the iNPHGS (6.39 ± 1.76 vs 4.26 ± 1.69, respectively; p < 0.001), MMSE (6.63 ± 1.82 vs 5.09 ± 1.93; p = 0.010), TMT-A (6.32 ± 1.97 seconds vs 5.13 ± 1.93 seconds; p = 0.042), and TUG-t (6.48 ± 1.81 seconds vs 4.33 ± 1.59 seconds; p < 0.001).CONCLUSIONSMRI-based DESH scoring is useful for the prediction of neurological improvement and prognosis after surgery for iNPH.

APA, Harvard, Vancouver, ISO, and other styles

36

Fjellström, Carmina, Kaj Nyström, and Yuqiong Wang. "Asymptotic mean value formulas, nonlocal space-time parabolic operators and anomalous tug-of-war games." Journal of Differential Equations 342 (January 2023): 150–78. http://dx.doi.org/10.1016/j.jde.2022.09.032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Zhong, Rui, and Shijie Xu. "Neural-network-based terminal sliding-mode control for thrust regulation of a tethered space-tug." Astrodynamics 2, no. 2 (May 15, 2018): 175–85. http://dx.doi.org/10.1007/s42064-017-0019-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Mammarella, M., C. A. Paissoni, N. Viola, A. Denaro, E. Gargioli, and F. Massobrio. "The Lunar Space Tug: A sustainable bridge between low Earth orbits and the Cislunar Habitat." Acta Astronautica 138 (September 2017): 102–17. http://dx.doi.org/10.1016/j.actaastro.2017.05.034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Davis, Don, and Vittorio Marone. "Learning in Discussion Forums." International Journal of Game-Based Learning 6, no. 3 (July 2016): 1–17. http://dx.doi.org/10.4018/ijgbl.2016070101.

Full text

Abstract:

In the learning sciences and game studies communities, there has been an increasing interest in the potential of game-related “paratexts” and “surrounds” in supporting learning, such as online discussion forums and gaming affinity spaces. While there have been studies identifying how learning occurs in such communities, little research has been done on learning at the aggregate level. This study examined the social construction of knowledge in two sections of the discussion forums in the TUG (“The Untitled Game”) gaming affinity space. Findings suggest that game-like prompts and sections in online discussion forums can spur higher level forms of interaction and learning and can have implications for the design of gaming communities in which the social construction of knowledge is a desired outcome.

APA, Harvard, Vancouver, ISO, and other styles

40

Emmett, Ilana R. "Feeling at home: Sound, affect and domesticity on radio soap operas." Radio Journal:International Studies in Broadcast & Audio Media 19, no. 1 (April 1, 2021): 23–39. http://dx.doi.org/10.1386/rjao_00032_1.

Full text

Abstract:

This article introduces the concept of ‘the everyday implausible’, asserting that, between 1930 and 1960, US radio serial aesthetics produced a tug-of-war between the familiar and the unfamiliar that was simultaneously radical and reactionary. This aesthetic created a space for the listener to place new versions of herself within the narrative, inviting the imagined woman-at-home to re-envisioning the possibilities of reality. However, re-envisioning reality produced its own set of limitations. The sonic features of the radio serial soundscape created imaginary spaces within the home, but these imaginary spaces were ‐ as often as not ‐ also homes, making the potential of escape wholly illusory. In giving attention to the specific aesthetic features of these programmes, this article interrogates the meaningful work produced by a sparse soundscape, alongside an emphasis on domesticity and emotional conversation.

APA, Harvard, Vancouver, ISO, and other styles

41

Starinova, O. L., and M. K. Fain. "Locally optimal control of space tug motion between the libration points of the Earth-Moon system." VESTNIK of Samara University. Aerospace and Mechanical Engineering 16, no. 3 (November 23, 2017): 114. http://dx.doi.org/10.18287/2541-7533-2017-16-3-114-124.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Stonsaovapak, Chernkhuan, Viboon Sangveraphunsiri, Weerachai Jitpugdee, and Krisna Piravej. "Telerehabilitation in Older Thai Community-Dwelling Adults." Life 12, no. 12 (December 5, 2022): 2029. http://dx.doi.org/10.3390/life12122029.

Full text

Abstract:

To investigate the impact on physical performance and walking abilities associated with fall risk and disability in the senior population, we created a telerehabilitation system. This is a multi-site, community setting, pre–post experimental study. We recruited participants from four rural areas in Thailand. All participants received eight weeks of tele-exercise, three sessions per week, via the telerehabilitation system. After the intervention, all participants underwent the Short Physical Performance Battery (SPPB), Timed Up and Go (TUG) test, and the six-minute walk test (6MWT) using a wearable sensor system. A total of 123 participants participated in the study and 2 participants dropped out while conducting the study, thus 121 participants were included in the analysis. In comparison to the baseline, we discovered a considerable improvement in the SPPB score (0.65 ± 0.22, p < 0.001), TUG (−1.70 ± 0.86, p < 0.001), and 6MWT (10.23 ± 7.33, p = 0.007). Our study demonstrates the benefits of telerehabilitation on SPPB, TUG, and 6MWT related to disabilities and fall risk. This telerehabilitation technology demonstrated its viability in the community environment and demonstrated its capacity to offer fundamental components of remote rehabilitation services within the healthcare system.

APA, Harvard, Vancouver, ISO, and other styles

43

Heino, Joonas. "A continuous time tug-of-war game for parabolic p(x,t)-Laplace-type equations." Communications in Contemporary Mathematics 21, no. 05 (July 12, 2019): 1850047. http://dx.doi.org/10.1142/s0219199718500475.

Full text

Abstract:

We formulate a stochastic differential game in continuous time that represents the unique viscosity solution to a terminal value problem for a parabolic partial differential equation involving the normalized [Formula: see text]-Laplace operator. Our game is formulated in a way that covers the full range [Formula: see text]. Furthermore, we prove the uniqueness of viscosity solutions to our equation in the whole space under suitable assumptions.

APA, Harvard, Vancouver, ISO, and other styles

44

Liu, Fang, and Feida Jiang. "Parabolic Biased Infinity Laplacian Equation Related to the Biased Tug-of-War." Advanced Nonlinear Studies 19, no. 1 (February 1, 2019): 89–112. http://dx.doi.org/10.1515/ans-2018-2019.

Full text

Abstract:

Abstract In this paper, we study the parabolic inhomogeneous β-biased infinity Laplacian equation arising from the β-biased tug-of-war {u_{t}}-\Delta_{\infty}^{\beta}u=f(x,t), where β is a fixed constant and {\Delta_{\infty}^{\beta}} is the β-biased infinity Laplacian operator \Delta_{\infty}^{\beta}u=\Delta_{\infty}^{N}u+\beta\lvert Du\rvert related to the game theory named β-biased tug-of-war. We first establish a comparison principle of viscosity solutions when the inhomogeneous term f does not change its sign. Based on the comparison principle, the uniqueness of viscosity solutions of the Cauchy–Dirichlet boundary problem and some stability results are obtained. Then the existence of viscosity solutions of the corresponding Cauchy–Dirichlet problem is established by a regularized approximation method when the inhomogeneous term is constant. We also obtain an interior gradient estimate of the viscosity solutions by Bernstein’s method. This means that when f is Lipschitz continuous, a viscosity solution u is also Lipschitz in both the time variable t and the space variable x. Finally, when {f=0} , we show some explicit solutions.

APA, Harvard, Vancouver, ISO, and other styles

45

Meekes, Wytske, J. C. Korevaar, C. J. Leemrijse, and L. A. M. van de Goor. "A Practical and Validated Fall Risk Screening Instrument: A Systematic Review." Innovation in Aging 4, Supplement_1 (December 1, 2020): 233. http://dx.doi.org/10.1093/geroni/igaa057.752.

Full text

Abstract:

Abstract Early detection of a high fall risk is important to start fall preventive interventions in time and to reduce fall risk among older people. Several fall risk screening instruments are available, however it is unclear which instrument is validated and most suitable for the primary care setting. This systematic review aims to identify the most suitable fall risk screening instrument(s) for the primary care setting (i.e. requires limited time, no expensive equipment and no additional space) with good prognostic ability to assess high fall risk among independently living older people. An extensive search was conducted in the databases PubMed, EMBASE CINAHL, Cochrane and PsycINFO. Twenty-six out of 2277 articles published between January 2000 and February 2019 were included. Six fall risk screening instruments were identified; TUG test, Gait Speed test, BBS, POMA, FR test, Fall History. Most articles reported AUCs ranging from 0.5-0.7 for all instruments. Sensitivity and specificity varied substantially across studies (e.g. TUG, sens.: 10-83.3%, spec.:37-96.6%). The results showed that none of the included screening instruments had sufficient (AUC>0.7) predictive performance (Šimundić, 2009). As suitability for the primary care setting prevails for now, Fall History appears to be the most suitable screening instrument. Compared to the other instruments, Fall History requires the least amount of time, no expensive equipment, no training, and no space (adjustments). Patient’s fall history together with a health care professional’s clinical judgment, might be a promising screening strategy for the primary care setting to identify high fall risk among older people.

APA, Harvard, Vancouver, ISO, and other styles

46

Hou, Jun, Carlos S. Frenk, Cedric G. Lacey, and Sownak Bose. "Constraining SN feedback: a tug of war between reionization and the Milky Way satellites." Monthly Notices of the Royal Astronomical Society 463, no. 2 (August 15, 2016): 1224–39. http://dx.doi.org/10.1093/mnras/stw2033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Murabayashi, Nobuyuki, Takako Akahoshi, Risa Ishimine, Nobuko Saji, Chiyomi Takeda, Hisako Nakayama, Megumi Noro, et al. "Effects of Music Therapy in Frail Elderlies: Controlled Crossover Study." Dementia and Geriatric Cognitive Disorders Extra 9, no. 1 (March 5, 2019): 87–99. http://dx.doi.org/10.1159/000496456.

Full text

Abstract:

Background: Music therapy (MT) may exert beneficial preventive effects in frail elderly individuals in psychophysiological health. Objectives: One hundred and fifteen frail elderly individuals (65–89 years old) participated. Methods: Subjects were randomly divided into 2 groups for a controlled crossover trial. The MT-first group participated in group sessions of 45–50 min conducted by a certified music therapist for 12 weeks, followed by a 12-week waiting period. The waiting-first group participated in the reverse order. Cognitive function was assessed by the Verbal Fluency Test (VFT) and Yamaguchi Kanji Symbol Substitution Test (YKSST). Physical function was assessed by the Timed Up and Go test (TUG). Psychophysical health was assessed by the Geriatric Depression Scale 15-item version (GDS-15), General Health Questionnaire 12-item version (GHQ-12), Instrumental Activity of Daily Living (IADL) scale, and Life Space Assessment (LSA) scale. We also evaluated the outcome of MT using the Clinical Global Impressions of Improvement (CGI-I) scale. Results: After 12 weeks of MT, significant improvements were observed in TUG, GDS-15, and GHQ-12 scores. However, no improvements were noted in other scores. CGI-I scores revealed the significant benefits of MT. Conclusions: MT may improve physical function, depressive mood, and quality of life in frail elderly individuals.

APA, Harvard, Vancouver, ISO, and other styles

48

Finchenko, V. S., S. N. Ustinov, and A. A. Ivankov. "Thermal destruction calculation method and its results for Fregat Versatile Space Tug during entry into the Earth’s atmosphere." Solar System Research 49, no. 7 (December 2015): 476–84. http://dx.doi.org/10.1134/s0038094615070072.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Ciobotaru, Ana-Maria, Ion Andronache, Helmut Ahammer, Marko Radulovic, Daniel Peptenatu, Radu-Daniel Pintilii, Cristian-Constantin Drăghici, et al. "Application of Fractal and Gray-Level Co-Occurrence Matrix Indices to Assess the Forest Dynamics in the Curvature Carpathians—Romania." Sustainability 11, no. 24 (December 5, 2019): 6927. http://dx.doi.org/10.3390/su11246927.

Full text

Abstract:

The mountain ecosystems face significant damage from deforestation and environmental forest changes. We investigated the evolution of tree types of cover areas, deforested areas and total deforested areas from Curvature Carpathians using Gray-Level Co-occurrence Matrix and fractal analysis. The forest dynamics mapping was one of the main objectives of this study and it was carried out using multiple fractal and GLCM indices. We approached the analysis of satellite forest images by calculation of four fractal indices such as Pyramid dimension, Cube Counting Dimension, Fractal Fragmentation-Compaction Index and Tug-of-War lacunarity. We also calculated fractal dimension because it is an index of complexity comparing how the detail in a pattern changes with the scale at which it is measured. Fractal dimension is useful for estimation of irregularity or roughness of fractal and natural objects that do not conform to Euclidian geometry. While the fractal dimension quantifies how much space is occupied, the Tug-of-War lacunarity complements fractal dimension with its ability to quantify how space is occupied. Analysis was further supplemented by the Gray-Level Co-occurrence Matrix analysis because it quantifies spatial probability distributions of gray level values between pixel pairs within an image. The calculated Gray-Level Co-occurrence Matrix features included Angular Second Moment, Contrast, Correlation, Inverse Difference Moment and Entropy. Such comprehensive analysis has the advantage of combining fractal analysis that extracts quantitative information about the morphological complexity of the image with the spatial distribution of the gray pixel intensities as calculated by the co-occurrence features provided by Gray-Level Co-occurrence Matrix. Evolution of deforested areas, expansion of agricultural land and the increased demand for quality timber have affected the forests ecosystems and, the regional sustainable development of local communities.

APA, Harvard, Vancouver, ISO, and other styles

50

Koznowski, Wojciech, and Andrzej Łebkowski. "Analysis of Hull Shape Impact on Energy Consumption in an Electric Port Tugboat." Energies 15, no. 1 (January 4, 2022): 339. http://dx.doi.org/10.3390/en15010339.

Full text

Abstract:

The trend to replace internal combustion engines with electric zero-emission drives, visible in the automotive industry, also exists in the shipbuilding industry. In contrary to land vehicles, the requirements for the electric propulsion system of tugs are much greater, which combined with the limited space and energy on board, makes any amount of energy valuable. Strategic changes in the policy of many countries, such as the “Fit for 55” package, introduce plans to significantly reduce CO2 emissions, which favors the development of alternative drives and their introduction to new areas of operation. This article presents that it is possible to reduce the amount of energy an electric tug spends for movement by applying the Particle Swarm Optimization method to modify the shape of its hull. A statistical analysis of public data was performed to determine the speed profiles of actual port tugs. The Van Oortmerssen method was used to determine the hull resistances of the proposed tug and the impact of the hull shape modification sets on reducing these resistances. Based on the six obtained speed profiles, it was determined that one of the tested variants of modifications made it possible to reduce energy consumption on average by 2.12%, to even 3.87% for one of the profiles, and that some modifications increase energy consumption by even 6.59%.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!