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Статті в журналах з теми "Liftée"

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Автор: Grafiati

Опубліковано: 28 вересня 2022

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1

Cheng, Te-Shiang, and Tzu-Hsien Lee. "Maximum Acceptable Weight of Lift for Asymmetric Lifting." Perceptual and Motor Skills 96, no. 3_suppl (June 2003): 1339–46. http://dx.doi.org/10.2466/pms.2003.96.3c.1339.

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10 undergraduate men were tested to determine the effects of lifting mode and frequency on psychophysically established maximum acceptable weight of lift for 4 hr. of work. The heart rate and rate of perceived exertion (RPE) of the individuals while lifting the maximum acceptable weight of lift were measured. When performing a 90° asymmetric lifting, subjects lifted approximately 10% less weight than lifted in symmetric lifting. Nonsignificant differences in maximum acceptable weight of lift, heart rate, and RPE values were found between asymmetric lifting with trunk rotation and asymmetric lifting with leg rotation. The lifting frequency significantly affected the maximum acceptable weight of lift, heart rate, and RPE. Heart rate and RPE increased with lifting frequency. The maximum acceptable weight of lift at 2 lifts/min. and 4 lifts/min. were approximately 91.5% and 82.5% of that of 1 lift/min., respectively.

2

Fiedler, Katherine, Steven Lord, and Jason Czarnezki. "Life Cycle Costing and Food Systems: Concepts, Trends, and Challenges of Impact Valuation." Michigan Journal of Environmental & Administrative Law, no. 8.1 (2018): 1. http://dx.doi.org/10.36640/mjeal.8.1.life.

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Our global food systems create pervasive environmental, social, and health impacts. Impact valuation is an emerging concept that aims to quantify all environmental, social, and health costs of food systems in an attempt to make the true cost of food more transparent. It also is designed to facilitate the transformation of global food systems. The concept of impact valuation is emerging at the same time as, and partly as a response to, calls for the development of legal mechanisms to address environmental, social, and health concerns. Information has long been understood both as a necessary precursor for regulation and as a regulatory tool in and of itself. With global supply chains and widespread impacts, data necessary to produce robust and complete impact valuation requires participation and cooperation from a variety of food system actors. New costing methods, beyond basic accounting, are necessary to incorporate the scope of impacts and stakeholders. Furthermore, there are a range of unanswered questions surrounding realizations of impact valuation methods, e.g. data sharing, international privacy, corporate transparency, limitations on valuation itself, and data collection standardization. Because of the proliferation of calls for costing tools, this article steps back and assesses the current development of impact valuation methods. In this article, we review current methods and initiatives for the implementation of food system impact valuation. We conclude that in some instances, calls for the implementation of costing have outpaced available and reliable data collection and current costing techniques. Many existing initiatives are being developed without adequate consideration of the legal challenges that hinder implementation. Finally, we conclude with a reminder that although impact valuation tools are most often sought and implemented in service of market-based tools for reform, they can also serve as a basis for robust public policies.

3

Honey, Gerald. "LIFE‐CYCLE COSTING FOR LIFTS." Facilities 7, no. 12 (December 1989): 15–18. http://dx.doi.org/10.1108/eb006517.

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4

h, Rudolp, S. H. Miller, and Peter B. Fodor. "Do forehead lifts lift or unfurl?" Plastic and Reconstructive Surgery 90, no. 5 (November 1992): 936. http://dx.doi.org/10.1097/00006534-199211000-00053.

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5

Rudolph, Ross, and Stephen H. Miller. "Do forehead lifts lift or unfurl?" Aesthetic Plastic Surgery 16, no. 1 (1992): 1–9. http://dx.doi.org/10.1007/bf00455141.

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6

Aghazadeh, F., K. S. Lee, A. M. Waikar, and A. C. Bittner. "Utilization of Direct Estimation Method to Determine the Effects of Task Variables on the Capacity to Lift Loads." Proceedings of the Human Factors Society Annual Meeting 32, no. 11 (October 1988): 687–89. http://dx.doi.org/10.1518/107118188786762414.

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This paper presents results of a pilot study in which the “direct estimation” method was used to determine the lifting capacity of individuals. Using the capacity of subjects to lift a load from floor to overreach height at frequency of 4 lifts per minute as a base, their capacity to lift under condition of varying task variables was determined. In this study 9 lifting heights, 5 frequencies, and 3 box sizes were used. The amount of load which the subjects were willing to lift was determined by the standard psychophysical methodology. Then the subjects lifted the same loads to various heights at different frequencies using different size boxes. A relationship was established between load lifted to the various lifting heights and the perceived difficulty of the lifting task. A similar relationship was determined for various frequencies and box sizes. An analysis of the results of this methodology reveals that the use of “direct estimation method” provides the effects of task variables on the amount of the lifted load accurately in a short period of time.

7

Waddell, Morgan L., and Eric L. Amazeen. "Lift speed moderates the effects of muscle activity on perceived heaviness." Quarterly Journal of Experimental Psychology 71, no. 10 (January 1, 2018): 2174–85. http://dx.doi.org/10.1177/1747021817739784.

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Research has shown that perceived heaviness is a function of the ratio of muscle activity (measured by electromyogram [EMG]) to the resulting acceleration of the object. However, objects will commonly be lifted at different speeds, implying variation in both EMG and acceleration. This study examined the effects of lifting speed by having participants report perceived heaviness for objects lifted by elbow flexion at three different speeds: slow, preferred, and fast. EMG and angular acceleration were recorded during these lifts. Both EMG and angular acceleration changed across lift speed. Nevertheless, despite these variations, perceived heaviness consistently scaled to the ratio of EMG to angular acceleration. The exponents on these parameters suggested that the saliency of muscle activity and movement changed across the three lift speeds.

8

Asher, Lyell. "Life against Death in Death and Liffe." Christianity & Literature 50, no. 2 (March 2001): 207–24. http://dx.doi.org/10.1177/014833310105000203.

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9

Rudolph, Ross, and S. Anthony Wolfe. "Face Lifts and Brow Lift after Radiotherapy." Plastic and Reconstructive Surgery 111, no. 7 (June 2003): 2445–48. http://dx.doi.org/10.1097/01.prs.0000060801.16268.8d.

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10

Hlucny, Steven D., and Domen Novak. "Characterizing Human Box-Lifting Behavior Using Wearable Inertial Motion Sensors." Sensors 20, no. 8 (April 18, 2020): 2323. http://dx.doi.org/10.3390/s20082323.

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Although several studies have used wearable sensors to analyze human lifting, this has generally only been done in a limited manner. In this proof-of-concept study, we investigate multiple aspects of offline lift characterization using wearable inertial measurement sensors: detecting the start and end of the lift and classifying the vertical movement of the object, the posture used, the weight of the object, and the asymmetry involved. In addition, the lift duration, horizontal distance from the lifter to the object, the vertical displacement of the object, and the asymmetric angle are computed as lift parameters. Twenty-four healthy participants performed two repetitions of 30 different main lifts each while wearing a commercial inertial measurement system. The data from these trials were used to develop, train, and evaluate the lift characterization algorithms presented. The lift detection algorithm had a start time error of 0.10 s ± 0.21 s and an end time error of 0.36 s ± 0.27 s across all 1489 lift trials with no missed lifts. For posture, asymmetry, vertical movement, and weight, our classifiers achieved accuracies of 96.8%, 98.3%, 97.3%, and 64.2%, respectively, for automatically detected lifts. The vertical height and displacement estimates were, on average, within 25 cm of the reference values. The horizontal distances measured for some lifts were quite different than expected (up to 14.5 cm), but were very consistent. Estimated asymmetry angles were similarly precise. In the future, these proof-of-concept offline algorithms can be expanded and improved to work in real-time. This would enable their use in applications such as real-time health monitoring and feedback for assistive devices.

11

Bingham, Geoffrey P. "Scaling Judgments of Lifted Weight: Lifter Size and the Role of the Standard." Ecological Psychology 5, no. 1 (March 1993): 31–64. http://dx.doi.org/10.1207/s15326969eco0501_2.

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12

Varghese, Koshy, Parmanand Dharwadkar, John Wolfhope, and James T. O'Connor. "A Heavy Lift Planning System for Crane Lifts." Computer-Aided Civil and Infrastructure Engineering 12, no. 1 (January 1997): 31–42. http://dx.doi.org/10.1111/0885-9507.00044.

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13

Mizumoto, S. "Congruences for fourier coefficients of lifted siegel modular forms I: Eisenstein lifts." Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg 75, no. 1 (December 2005): 97–120. http://dx.doi.org/10.1007/bf02942038.

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14

Saraceni, Nic, Amity Campbell, Peter Kent, Leo Ng, Leon Straker, and Peter O’Sullivan. "Exploring lumbar and lower limb kinematics and kinetics for evidence that lifting technique is associated with LBP." PLOS ONE 16, no. 7 (July 21, 2021): e0254241. http://dx.doi.org/10.1371/journal.pone.0254241.

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Purpose To investigate if lumbar and lower limb kinematics or kinetics are different between groups with and without a history of LBP during lifting. Secondly, to investigate relationships between biomechanical variables and pain ramp during repeated lifting. Methods 21 LBP and 20 noLBP participants completed a 100-lift task, where lumbar and lower limb kinematics and kinetics were measured during lifting, with a simultaneous report of LBP intensity every 10 lifts. Lifts were performed in a laboratory setting, limiting ecological validity. Results The LBP group used a different lifting technique to the noLBP group at the beginning of the task (slower and more squat-like). Kinetic differences at the beginning included less peak lumbar external anterior shear force and greater peak knee power demonstrated by the LBP group. However, at the end of the task, both groups lifted with a much more similar technique that could be classified as more stoop-like and faster. Peak knee power remained greater in the LBP group throughout and was the only kinetic difference between groups at the end of the lifting task. While both groups lifted using a more comparable technique at the end, the LBP group still demonstrated a tendency to perform a slower and more squat-like lift throughout the task. Only one of 21 variables (pelvic tilt at box lift-off), was associated with pain ramp in the LBP group. Conclusions: Workers with a history of LBP, lift with a style that is slower and more squat-like than workers without any history of LBP. Common assumptions that LBP is associated with lumbar kinematics or kinetics such as greater lumbar flexion or greater forces were not observed in this study, raising questions about the current paradigm around ‘safe lifting’.

15

Hadiji, Fabian, and Kristian Kersting. "Reduce and Re-Lift: Bootstrapped Lifted Likelihood Maximization for MAP." Proceedings of the AAAI Conference on Artificial Intelligence 27, no. 1 (June 30, 2013): 394–400. http://dx.doi.org/10.1609/aaai.v27i1.8647.

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By handling whole sets of indistinguishable objects together, lifted belief propagation approaches have rendered large, previously intractable, probabilistic inference problems quickly solvable. In this paper, we show that Kumar and Zilberstein's likelihood maximization (LM) approach to MAP inference is liftable, too, and actually provides additional structure for optimization. Specifically, it has been recognized that some pseudo marginals may converge quickly, turning intuitively into pseudo evidence. This additional evidence typically changes the structure of the lifted network: it may expand or reduce it. The current lifted network, however, can be viewed as an upper bound on the size of the lifted network required to finish likelihood maximization. Consequently, we re-lift the network only if the pseudo evidence yields a reduced network, which can efficiently be computed on the current lifted network. Our experimental results on Ising models, image segmentation and relational entity resolution demonstrate that this bootstrapped LM via "reduce and re-lift" finds MAP assignments comparable to those found by the original LM approach, but in a fraction of the time.

16

Salimi, Iran, Ian Hollender, Wendy Frazier, and Andrew M. Gordon. "Specificity of Internal Representations Underlying Grasping." Journal of Neurophysiology 84, no. 5 (November 1, 2000): 2390–97. http://dx.doi.org/10.1152/jn.2000.84.5.2390.

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The present study examines anticipatory control of fingertip forces during grasping based on the center of mass (CM) of a manipulated object. Subjects lifted an object using a precision grip while the fingertip forces and the angle about the vertical axis (roll) were measured. The object's CM could be shifted to the left or right of the object's center parallel to the grip axis without changing it's visual appearance. Subjects performed 20 lifts with the CM in the center, left, and right side of the object, respectively. Subjects were instructed to lift the object while preventing it from tilting. Within three to five lifts, subjects were able to asymmetrically partition the load force development before lift-off such that it was higher in the digit opposing the CM. This anticipatory load force partitioning prevented the object from rolling sideways at lift-off. To determine whether the internal representation underlying the anticipatory control is specific to the effectors used to form it, subjects performed five lifts with the right hand with the CM on one side. Following these lifts, they rotated the object 180° around the vertical axis and performed one lift with the same hand or they translated the object to the left side of the body (with or without rotating it) and performed one lift with the left hand. Despite subjects' explicit knowledge of the new weight distribution, they were unable to appropriately scale the load forces at each digit, resulting in a subsequent large roll of the object. The findings suggest that within a few lifts subjects achieve a stable internal representation which accounts for the object's CM and is used to scale the fingertip forces in advance. They also suggest that this representation, which is used for anticipatory control of fingertip forces, is specific to the effectors used to form it. We propose that multiple internal representations may be used during the anticipatory control of grasping.

17

Durham, Neil. "Giving people the lift they need: platform stair-lifts." Nursing and Residential Care 1, no. 3 (June 1999): 168–18. http://dx.doi.org/10.12968/nrec.1999.1.3.7886.

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18

Peters, R. D., P. Mehta, and J. Haddon. "Lift traffic analysis: General formulae for double-deck lifts." Building Services Engineering Research and Technology 17, no. 4 (November 1996): 209–13. http://dx.doi.org/10.1177/014362449601700408.

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19

Rice, Valerie J., Michelle Murphy, Marilyn A. Sharp, Randall K. Bills, and Robert P. Mello. "The Effect of Lift Height on Maximal Lifting Capabilities of Men and Women." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 40, no. 13 (October 1996): 619–23. http://dx.doi.org/10.1177/154193129604001308.

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The purpose of this study was to determine the effect of lift height on the one repetition maximum box lifting strength (1 RM) of men and women. Ten men and eleven women lifted to heights of 1, 2, 3, 4, 5, and 6 ft using a 46.5 cm long x 31 cm wide x 23 cm high aluminum box with handles. All lifts were accomplished using correct lifting technique while facing forward. An ANOVA, focused on six heights and blocked for gender was used for analysis. A Newman-Kuels post-hoc analysis was used to examine the significant differences between means. Results revealed that men lifted more than women overall (F = 128.9, p < 0.01), and at each individual height (p < 0.01). When the genders were combined, the two highest lifts (5 and 6 ft) were not different from each other, nor were the two lowest (1 and 2 ft). All other heights differed from one another (p < 0.01). For both genders, the greatest percentage decrease from one height to the next occurred between 3 and 4 feet, when more upper body strength and torso involvement were required.

20

Mizumoto, S. "Congruences for Fourier coefficients of lifted Siegel modular forms II: The Ikeda lifts." Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg 77, no. 1 (December 2007): 137–53. http://dx.doi.org/10.1007/bf03173494.

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21

Marras, William S., Kermit G. Davis, Bryan C. Kirking, and Kevin P. Granata. "Spine Loading and Trunk Kinematic Changes during Team Lifting." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 41, no. 1 (October 1997): 661–64. http://dx.doi.org/10.1177/1071181397041001145.

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Two-person or team lifting is a popular method for handling materials under certain conditions. While many guidelines and standards address safe lifting limits for individuals, there are no such limits for team lifting and these lifts are poorly understood. The literature associated with team lifting offers some interesting paradoxes. Many studies have indicated that people lift less under team conditions compared to one-person lifting. Yet at least one study has reported an increase in team lifting capacity when subjects were height matched. This study explored the spine loading characteristics of one-person and two-person lifting teams when subjects lifted under several sagittally symmetric and asymmetric conditions. Spine compression was lower for two person lifts while lifting in sagittally symmetric conditions, whereas, lateral shear became much greater for two-person lifts under asymmetric lifting conditions. This study has linked these changes to differences in trunk kinematic patterns adopted during one verse two-person lifting.

22

Zhou, Tong, Thuy-vy Thi Nguyen, Jiayi Zhong, and Junsheng Liu. "A COVID-19 descriptive study of life after lockdown in Wuhan, China." Royal Society Open Science 7, no. 9 (September 2020): 200705. http://dx.doi.org/10.1098/rsos.200705.

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On 8 April 2020, the Chinese government lifted the lockdown and opened up public transportation in Wuhan, China, the epicentre of the COVID-19 pandemic. After 76 days in lockdown, Wuhan residents were allowed to travel outside of the city and go back to work. Yet, given that there is still no vaccine for the virus, this leaves many doubting whether life will indeed go back to normal. The aim of this research was to track longitudinal changes in motivation for self-isolating, life-structured, indicators of well-being and mental health after lockdown was lifted. We have recruited 462 participants in Wuhan, China, prior to lockdown lift between 3 and 7 April 2020 (Time 1), and have followed up with 292 returning participants between 18 and 22 April 2020 (Time 2), 284 between 6 and 10 May 2020 (Time 3), and 279 between 25 and 29 May 2020 (Time 4). This four-wave study used latent growth models to examine how Wuhan residents' psychological experiences change (if at all) within the first two months after lockdown was lifted. The Stage 1 manuscript associated with this submission received in-principle acceptance (IPA) on 2 June 2020. Following IPA, the accepted Stage 1 version of the manuscript was preregistered on the OSF at https://osf.io/g2t3b. This preregistration was performed prior to data analysis. Generally, our study found that: (i) a majority of people still continue to value self-isolation after lockdown was lifted; (ii) by the end of lockdown, people perceived gradual return to normality and restored structure of everyday life; (iii) the psychological well-being slightly improved after lockdown was lifted; (iv) people who used problem solving and help-seeking as coping strategies during lockdown had better well-being and mental health by the end of the lockdown; (v) those who experienced more disruptions in daily life during lockdown would display more indicators of psychological ill-being by the end of the lockdown.

23

RIERA, IGNASI MUNDET I. "LIFTS OF SMOOTH GROUP ACTIONS TO LINE BUNDLES." Bulletin of the London Mathematical Society 33, no. 3 (May 2001): 351–61. http://dx.doi.org/10.1017/s0024609301007937.

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Let X be a compact manifold with a smooth action of a compact connected Lie group G. Let L → X be a complex line bundle. Using the Cartan complex for equivariant cohomology, we give a new proof of a theorem of Hattori and Yoshida which says that the action of G lifts to L if and only if the first Chern class c1(L) of L can be lifted to an integral equivariant cohomology class in H2G(X; ℤ), and that the different lifts of the action are classified by the lifts of c1(L) to H2G(X; ℤ). As a corollary of our method of proof, we prove that, if the action is Hamiltonian and ∇ is a connection on L which is unitary for some metric on L, and which has a G-invariant curvature, then there is a lift of the action to a certain power Ld (where d is independent of L) which leaves fixed the induced metric on Ld and the connection ∇[otimes ]d. This generalises to symplectic geometry a well-known result in geometric invariant theory.

24

Middleton, Kane J., Greg L. Carstairs, and Daniel J. Ham. "Lift performance and lumbar loading in standing and seated lifts." Ergonomics 59, no. 9 (January 15, 2016): 1242–50. http://dx.doi.org/10.1080/00140139.2015.1120888.

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25

McMenamin, Patrick. "Laser Face-Lifts: A New Paradigm in Face-Lift Surgery." Facial Plastic Surgery 27, no. 04 (July 26, 2011): 299–307. http://dx.doi.org/10.1055/s-0031-1283049.

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26

Pettersen, Johan, and Edgar G. Hertwich. "Occupational health impacts: offshore crane lifts in life cycle assessment." International Journal of Life Cycle Assessment 13, no. 5 (May 1, 2008): 440–49. http://dx.doi.org/10.1007/s11367-008-0003-2.

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27

Funato, Kazuhiro, Yuichiro Kenmotsu, Ryosuke Tasaki, Toshio Sakakibara, Kiyoaki Kakihara, and Kazuhiko Terashima. "Experimental Analysis and Anti-Sway Control of Jigiri Behavior in a Nursing Lift." International Journal of Automation Technology 14, no. 4 (July 5, 2020): 615–24. http://dx.doi.org/10.20965/ijat.2020.p0615.

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In today’s situation with high needs for care, a transfer work, among various assisting works, produces particularly large physical burden. The burden could result in not only diseases including waist pain but also resignation of care workers. A nursing lift used to reduce the burden lifts up a care receiver by using a wire or mechanical structure, causing sway. The sway not only makes the care receiver uncomfortable but also causes a risk of unintentional collision. To prevent such a situation, carers need to assist care receivers by holding them while simultaneously operating equipment and paying attention to the care receivers, which is not preferable from a viewpoint of work safety. In this study, we experimentally analyzed and discussed sway of a person when he/she is lifted up. On the basis of an analysis result, we propose an automatic control method of dynamical speed change for safe lifting works, which is applicable to ordinary nursing lifts.

28

Hashino, Satoshi. "Development of Stair-climbing Wheelchair." Journal of Robotics and Mechatronics 14, no. 6 (December 20, 2002): 524–30. http://dx.doi.org/10.20965/jrm.2002.p0524.

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Construction of barrier free society is desired especially for elderly and handicapped who need to use wheelchair in daily life. Stair climbing is the hardest barrier for those people. Supply of stair lift method is contribution to provide joy and satisfaction in life of those people. By using our developed crawl-type mechanism on powered wheelchair, they can easily and effectively climb up and down stairs. These system are composed of two subsystems, a few reformed powered wheelchair, drive guide and traction guide attached to stair wall. Presented system is cost effective compared with other existing methods such as elevators, escalators and conventional stair lifts.

29

Odjugo, Tega, Yahaya Baba, Aliyu Aliyu, Ndubuisi Okereke, Lekan Oloyede, and Olabisi Onifade. "Optimisation of Artificial Lifts Using Prosper Nodal Analysis for BARBRA-1 Well in Niger Delta." Nigerian Journal of Technological Development 17, no. 3 (October 29, 2020): 150–55. http://dx.doi.org/10.4314/njtd.v17i3.1.

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Hydrocarbon exploration basically requires effective drilling and efficient overpowering of frictional and viscosity forces. Normally, frictional power losses occur in deep well systems and it is essential to analyse each component of any well system to determine where exactly pressure is lost, and this can be done using Nodal Analysis. In this study, nodal analysis has been carried out with the use of PROSPER, a software for well performance, design and optimisation. Artificial lifts can then be used to solve the problem of frictional power losses. To increase the production of Barbra 1 well in the Niger Delta and hence extend its functional life, we have applied nodal analysis. Modelling results for three artificial lift methods; continuous gas lift, intermittent gas lift and electrical submersible pump were found to be 1734.93 bbl/day, 451.50 bbl/day and 2869 bbl/day respectively. The output from the well performance without artificial lift was 1370.99 bbl/day by applying Darcy’s model. Meanwhile, the output from the well without artificial lift is 89.90 bbl/day when aided with productivity index (PI) entry, the normal model for intermittent gas lift. Hence, from the comparative analysis of the results obtained from this study, it was deduced that when artificial lifts are employed, the well output increases significantly from 1370.99bbl/day to 2869 bbl/day (electrical submersible pump). This study concludes that wells such as Barbra 1 are good candidates for artificial lift, and this is evidenced by increasing productivity. Keywords: Production optimisation, nodal analysis, prosper simulator and barbra well.

30

Ahuja, Sangeeta. "Life Chakra Mantra for Work Life Balance." International Journal of Food, Nutrition & Dietetics 8, no. 1 (April 1, 2020): 9–13. http://dx.doi.org/10.21088/ijfnd.2322.0775.8120.1.

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31

Woods, Julia A., Brendon M. Stiles, Heather R. Wright, Raymond F. Morgan, and Richard F. Edlich. "Accidental hypothermia: A potential life-threatening hazard of automobile platform lifts." Journal of Emergency Medicine 15, no. 1 (January 1997): 45–48. http://dx.doi.org/10.1016/s0736-4679(96)00243-0.

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32

Mckinnery, P. W. "Secondary Endoscopic Forehead Lift in Patients With Previous Coronal Brow Lifts." Yearbook of Plastic and Aesthetic Surgery 2006 (January 2006): 144–45. http://dx.doi.org/10.1016/s1535-1513(08)70383-7.

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33

Kintisch, Eli. "Project lifts the veil on life in the ocean's twilight zone." Science 361, no. 6404 (August 23, 2018): 738. http://dx.doi.org/10.1126/science.361.6404.738.

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34

Lee, Soo-Jeong, and David Rempel. "Comparison of lift use, perceptions, and musculoskeletal symptoms between ceiling lifts and floor-based lifts in patient handling." Applied Ergonomics 82 (January 2020): 102954. http://dx.doi.org/10.1016/j.apergo.2019.102954.

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35

Wang, Xueke, Steven A. Lavender, and Carolyn Sommerich. "The Effects of Load Stability and Visual Access During Asymmetric Lifting Tasks on Back and Upper Extremity Biomechanical Responses." Human Factors: The Journal of the Human Factors and Ergonomics Society 61, no. 5 (December 6, 2018): 712–21. http://dx.doi.org/10.1177/0018720818814107.

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Objective: To explore the change of muscular and biomechanical responses in different load stability and visual access conditions during an asymmetric lifting task. Background: Previous studies found that lifting unstable loads resulted in changes to the biomechanical loads experienced by the spine and upper extremities. However, researchers have not extensively investigated behaviors when people lift potentially unstable loads. It was hypothesized that lifting a potentially unstable load can lead to changes in lifting behavior, which may be mitigated by visual access to the load. Method: Fourteen volunteers lifted either a stable load or a potentially unstable load that could move within the container during the lifting task. In half of the lifting conditions, the box was covered to restrict visual access when lifting. Spine kinematic and kinetic measures and surface electromyographic (EMG) signals from back, shoulder, and arm muscles were obtained. Results: Lifts of the stable load were faster and generally had higher peak muscle activations than lifts of the potentially unstable load. Participants had less spine flexion when handling the potentially unstable load without visual access. Conclusion: When lifting and moving a potentially unstable load that could lead to a perturbation, people tended to lift the container more slowly comparing with lifting a stable load, which in turn reduced the peak muscle activities. Application: In industry, there are many work situations where workers need to lift or carry unstable loads that can shift during transport. Providing visual access to the load may help mitigate some of these effects.

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Davis, Kermit G., William S. Marras, and Kevin P. Granata. "The Effect of Task Asymmetry and Number of Hands on Spinal Loading." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 41, no. 1 (October 1997): 647–51. http://dx.doi.org/10.1177/1071181397041001142.

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This study documented three-dimensional spine loading associated with asymmetric lifting while using either one or two hands to perform the task. Lift asymmetry was defined as a function of the load origin relative to the sagittal plane of the body. Lifts occurred at 0, 30, or 60 degrees off the sagittal plane on both sides of the body (lifting from the right and from the left relative to the sagittal plane). Ten subjects lifted a 13.7 kg box from one of these origins to a sagittally symmetric destination. Spinal loads were estimated through the use of a validated EMG-assisted model. Spine compression and lateral shear forces increased as the lift origin became more asymmetric. However, spine compression and lateral shear increased by about twice the rate when lifting from origins to the left of the sagittal plane compared to lifting from origins to the right of the sagittal plane. Anterior-posterior spinal shear decreased as asymmetry increased with larger decreases occurring when lift origins occurred to the right of the sagittal plane. One-hand lifting changed the compression and shear profiles significantly. One-hand lifts using the hand on the same side of the body as the load resulted in compression forces that were approximately equal to those observed when lifting with two hands in a sagittally symmetric position. Anterior -posterior shear decreased and lateral shear increased under these conditions. These results reflect the trade-offs that must be considered among spinal forces during asymmetric lifting while using one or two hands.

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OHNISHI, Akihiro, Kenta YAMAGIWA, Atsushi YAMAGUCHI, Takeshi YOSHIDA, and Isao YAMAGUCHI. "Development of a Detachable Rail System for a Tailgate Lifter (Tail Lift) Platform." Japanese Journal of Ergonomics 57, Supplement (May 22, 2021): 2D1–1–2D1–1. http://dx.doi.org/10.5100/jje.57.2d1-1.

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38

Hackney, Jim. "Effect of elastic lumbosacral supports on lumbar spine mechanical stresses." Occupational Ergonomics 2, no. 4 (September 25, 2001): 251–56. http://dx.doi.org/10.3233/oer-2001-2405.

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Subjects lifted a 6.82 kg weight from the floor to 1.23 meters high using an elastic lumbosacral support worn the conventional way, without a support, and with the support wide side forward. The lifts were analyzed using the "Lift-track" 2 dimensional analysis program, and the results subjected to repeated measures design analysis of variance (ANOVA) and post hoc Bonferroni analysis. This study indicates that use an elastic lumbosacral support is able to influence lifting posture enough to have a significant effect on mechanical stress being placed on the L5-S1 joint in lifting from the floor, if worn with the wide side facing the abdomen. Wearing the support in the conventional manner had no significant effect in reducing the mechanical stress on the lumbar spine.

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Trafimow, Jordan, and Alexander S. Aruin. "The Use of Negative Acceleration as Accessory Force during Lifting." Advances in Orthopedics 2018 (December 2, 2018): 1–4. http://dx.doi.org/10.1155/2018/9164590.

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Objectives. Injury associated with lifting, especially low back injury, is a big problem in industry that accounts for loss of work and high medical expenses. Studies of biomechanics of lifting provide a basis for optimization of lifting. The aim of the study was to further investigate the role of the upward force due to negative acceleration during a lift. Methods. Nine healthy subjects lifted an empty box and a box with additional load of 10, 20, and 25 lb. Kinematic data were recorded during the lifts and accelerations were calculated, and angular positions of the trunk and knee were obtained during the lifting when negative accelerations were used. Results. Negative acceleration assisted the quadriceps when the thighs were at approximately 90° and the hips when the trunk was rotating toward standing position. Negative acceleration was present during lifts of different loads. Conclusion. The outcome of the study suggests that enhancing the use of negative acceleration could be a strategy to improve the quality of lifting and minimize a probability of low back injury.

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Buwa, Dr Suman. "Literacy for Healthy Life Through Life Long Learning." Indian Journal of Applied Research 3, no. 10 (October 1, 2011): 1–2. http://dx.doi.org/10.15373/2249555x/oct2013/143.

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I, Kusumawaty. "Save Human Life through Basic Life Support Training." Nursing & Healthcare International Journal 5, no. 6 (2021): 1–6. http://dx.doi.org/10.23880/nhij-16000255.

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Heart attacks can occur without a predictable time or place of occurrence. Delays in administering first aid risk threatening the safety and even disability and claiming lives. Practicing the provision of basic life support for ordinary people is suspected to prevent the worsening of the condition of heart attack sufferers. This study aims to determine the effect of basic life support training on the motivation, knowledge, and skills of trainees in providing first aid when cases of cardiac arrest occur in the community. The design of the pre-experimental pretest-posttest one group is used to compare the motivation, knowledge, and skills of the people in Lahat City, South Sumatera Province, Indonesia before and after training. The participants numbered 86 people, determined by the purposive sampling technique. Questionnaire data collection instruments and observation sheets, motivational questionnaires were adopted from MQ John Smith 2017, while knowledge and skills questionnaires were compiled concerning Basic Life Support (BLS) literature. Basic life support training intervention is carried out as many as four sessions within a period of 3 months. Based on the analysis of the results obtained from abnormal data, the test conducted by the Wilcoxon Test is known to have a significant increase in the variables of knowledge, skills, and skills. Respondents’ motivation after training, is directed with sequential p-values namely BLS to motivation (p = 0.033), skills (p = 0.001), and knowledge (p=0.000). Conclusion: Basic life support training effectively improves community readiness to provide first aid to heart attack victims. This program must be disseminated until a basic life support community is formed on standby in the community.

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Nagao, Kubo, Tsuno, Kurosaka, and Muto. "A Biomechanical Comparison of Successful and Unsuccessful Snatch Attempts among Elite Male Weightlifters." Sports 7, no. 6 (June 21, 2019): 151. http://dx.doi.org/10.3390/sports7060151.

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The success factor of the snatch has not been identified. Determining the success factors of the snatch among elite weightlifters might help to attain a successful snatch. This study aimed at clarifying the factors that lead to a successful snatch based on barbell trajectory among elite male weightlifters. Data were collected at the 2017 World and Junior World Weightlifting Championships. We digitized the barbell trajectory of the successful and unsuccessful snatch attempts of 61 lifters—an unsuccessful lift would be as a result of a frontward barbell drop—and calculated the kinematic and kinetic parameters of the barbell. No significant difference was found in the barbell maximum height (Dy1) between the successful and unsuccessful lifts. The amount of backward displacement of the barbell in the second pull phase to the catch position (DxL) of the successful lift was significantly larger than that of the unsuccessful lift (successful: 0.11 ± 0.05 m; unsuccessful: 0.10 ± 0.06 m; p < 0.01; d = 0.278). The barbell drop distance in the catch phase (Dy3) of the successful lift was significantly smaller than that in the unsuccessful lift (successful: 0.17 ± 0.04 m; unsuccessful: 0.18 ± 0.04 m; p < 0.001, d = 0.361). These results suggest that DxL and Dy3 are factors leading to a successful snatch lift, but not Dy1. The relative position in the sagittal axis of the barbell and the lifter in the catch position, and catching the barbell when its momentum was low, are important in order to achieve a successful snatch.

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Richter, Dirk F., and Alexander Stoff. "The Scarpa Lift—A Novel Technique for Minimal Invasive Medial Thigh Lifts." Obesity Surgery 21, no. 12 (July 10, 2011): 1975–80. http://dx.doi.org/10.1007/s11695-011-0474-2.

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44

Frohlich, Michael W. "Contact Printing of Lift Filters for Alignment of Plaque and Colony Lifts." BioTechniques 29, no. 1 (July 2000): 30–34. http://dx.doi.org/10.2144/00291bm03.

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45

Mameri, Daniel, Rui Rivaes, João M. Oliveira, João Pádua, Maria T. Ferreira, and José M. Santos. "Passability of Potamodromous Species through a Fish Lift at a Large Hydropower Plant (Touvedo, Portugal)." Sustainability 12, no. 1 (December 24, 2019): 172. http://dx.doi.org/10.3390/su12010172.

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River fragmentation by large hydropower plants (LHP) has been recognized as a major threat for potamodromous fish. Fishways have thus been built to partially restore connectivity, with fish lifts representing the most cost-effective type at high head obstacles. This study assessed the effectiveness with which a fish lift in a LHP on the River Lima (Touvedo, Portugal), allows potamodromous fish—Iberian barbel (Luciobarbus bocagei), Northern straight-mouth nase (Pseudochondrostoma duriense) and brown trout (Salmo trutta fario)- to migrate upstream. Most fish (79.5%) used the lift between summer and early-fall. Water temperature was the most significant predictor of both cyprinids’ movements, whereas mean daily flow was more important for trout. Movements differed according to peak-flow magnitude: nase (67.8%) made broader use of the lift in the absence of turbined flow, whereas a relevant proportion of barbel (44.8%) and trout (44.2%) passed when the powerhouse was operating at half (50 m3s−1) and full-load (100 m3s−1), respectively. Size-selectivity found for barbel and trout could reflect electrofishing bias towards smaller sizes. The comparison of daily abundance patterns in the river with fish lift records allowed the assessment of the lift’s efficacy, although biological requirements of target species must be considered. Results are discussed in the context of management strategies, with recommendations for future studies.

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Quaney, Barbara M., Randolph J. Nudo, and Kelly J. Cole. "Can Internal Models of Objects be Utilized for Different Prehension Tasks?" Journal of Neurophysiology 93, no. 4 (April 2005): 2021–27. http://dx.doi.org/10.1152/jn.00599.2004.

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We examined if object information obtained during one prehension task is used to produce fingertip forces for handling the same object in a different prehension task. Our observations address the task specificity of the internal models presumed to issue commands for grasping and transporting objects. Two groups participated in a 2-day experiment in which they lifted a novel object (230 g; 1.2 g/cm3). On Day One, the high force group (HFG) lifted the object by applying 10 N of grip force prior to applying vertical lift force. This disrupted the usual coordination of grip and lift forces and represented a higher grip force than necessary. The self-selected force group (SSFG) lifted the object on Day One with no instructions regarding their grip or lift forces. They first generated grip forces of 5.8 N, which decreased to 2.6 N by the 10th lift. Four hours later, they lifted the same object in the manner of the HFG. On Day Two, both groups lifted the same object “naturally and comfortably” with the opposite hand. The SSFG began Day Two using a grip force of 2.5 N, consistent with the acquisition of an accurate object representation during Day One. The HFG began Day Two using accurately scaled lift forces, but produced grip forces that virtually replicated those of the SSFG on Day One. We concur with recent suggestions that separate, independently adapted internal models produce grip and lift commands. The object representation that scaled lift force was not available to scale grip force. Furthermore, the concept of a general-purpose object representation that is available across prehension tasks was not supported.

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Liu, Jian Guo, Yu Long Liu, and Xi Li. "Fatigue Life Analysis for Motor Base of Vehicle Glass Lifter Based on ANSYS Workbench." Advanced Materials Research 694-697 (May 2013): 95–99. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.95.

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It is important to analyse the fatigue life of components. We introduced the mechanism of metal fatigue, and systematically discussed the basic methods of fatigue life analysis and its development. The use of nominal stress method and the law of Miner in the fatigue damage accumulation theory are highlighted. The fatigue life analysis for motor base of the glass lifter was completed using this theory on ANSYS Workbench platform and according to the result, structure optimization was completed to make its life longer.

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de León, Manuel, and Modesto Salgado. "Lifts of derivations to the frame bundle." Czechoslovak Mathematical Journal 37, no. 1 (1987): 42–50. http://dx.doi.org/10.21136/cmj.1987.102133.

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Sakhale, Chandrashekhar. "Design of Inbuilt Automatic Pneumatic Jack for Four Wheelers." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 4384–88. http://dx.doi.org/10.22214/ijraset.2021.36062.

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This project deals with design and manufacturing of automatic pneumatic jack, which can lift the light weight vehicles and will be use full to maintain and inspect the vehicle’s vital components connected to downside. This jack would be permanently mounted on the chassis on the vehicle and will be automatically operated which will eliminate manually operating it to raise the vehicle and would save valuable time. The most important thing about this research is that it does not require any external power supply for its functioning and it consists of the pneumatic system and hence does not require the storage of air as it is easily available unlike the hydraulic system where the oil tank is required to store the oil. The objective of the project is to develop an automatic pneumatic lifter which automatically lifts the vehicle.

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Greene, Thomas A., and S. Tannis Danley. "Hand-Lifting Improves Field Performance of Loblolly Pine Seedlings." Southern Journal of Applied Forestry 25, no. 3 (August 1, 2001): 131–35. http://dx.doi.org/10.1093/sjaf/25.3.131.

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Abstract Loblolly pine (Pinus taeda L.) seedlings were lifted from two Georgia nurseries and planted on six sites in Georgia and Alabama during the winter of 1997/1998. Survival, height, and groundline diameters were measured after two growing seasons. Hand-lifted seedlings from both nurseries were taller than machine-lifted seedlings across all sites by 7–14 cm, resulting in stem volume index increases of 19–30% over 2 yr. Survival of hand-lifted seedlings was higher (P < 0.05) for the nursery using a two-row belt lifter. Seedlings from outer drills at this nursery were 10 cm taller and produced 21% more stem volume after 2 yr than seedlings from inner drills. South. J. Appl. For. 25(3):131–135.