scholarly journals Modeling, Simulation, and Analysis of a Variable-Length Pendulum Water Pump

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8064
Author(s):  
Godiya Yakubu ◽  
Paweł Olejnik ◽  
Jan Awrejcewicz
Keyword(s):  
Rural Areas ◽  
Degrees Of Freedom ◽  
Transient Behavior ◽  
Variable Length ◽  
Water Pump ◽  
Constant Length ◽  
Parametric Pendulum ◽  
Human Effort ◽  
The Many

Due to the long-term problem of electricity and potable water in most developing and undeveloped countries, predominantly rural areas, a novelty of the pendulum water pump, which uses a vertically excited parametric pendulum with variable-length using a sinusoidal excitation as a vibrating machine, is presented. With this, more oscillations can be achieved, reducing human effort further and having high output than the existing pendulum water pump with the conventional pendulum. The pendulum, lever, and piston assembly are modeled by a separate dynamical system and then joined into the many degrees-of-freedom dynamical systems. The present work includes friction while studying the system dynamics and then simulated to verify the system’s harmonic response. The study showed the effect of the pendulum length variability on the whole system’s performance. The vertically excited parametric pendulum with variable length in the system is established, giving faster and longer oscillations than the pendulum with constant length. Hence, more and richer dynamics are achieved. A quasi-periodicity behavior is noticed in the system even after 50 s of simulation time; this can be compensated when a regular external forcing is applied. Furthermore, the lever and piston oscillations show a transient behavior before it finally reaches a stable behavior.

Computer Analysis of Machines With Planar Motion: Part 2—Dynamics

1970 ◽  
Vol 37 (3) ◽  
pp. 703-712 ◽  
Author(s):  
B. Paul ◽  
D. Krajcinovic
Keyword(s):  
Degrees Of Freedom ◽  
Dynamic Performance ◽  
Transient Behavior ◽  
Basic Program ◽  
Design Tool ◽  
Multiple Degrees Of Freedom ◽  
Kinematic Loops ◽  
Long Term Behavior ◽  
Made In

A uniform procedure is described for establishing the dynamic equation of motion for machines with single or multiple degrees of freedom. The procedure, which utilizes the independent kinematic loops of the machine, is readily programmed for a digital computer. The basic program is largely independent of the specific machine being analyzed and is capable of treating input forces, internal springs and dampers, all of which may depend nonlinearly upon position, velocity, or time. As an example, the dynamic performance of a Stirling cycle engine is analyzed without recourse to simplifying approximations usually made in engine analysis (i.e., constant crank speed, use of approximate “rotating” and “reciprocating” weights, neglect of higher harmonics in piston motion). It is shown that the method not only predicts transient behavior, but is capable of predicting steady (long-term) behavior without loss of accuracy, or excessive computer costs. The method described satisfies the major criteria of generality, accuracy, and economy, required of a truly practical design tool.

Representing utility and deploying the body

2020 ◽  
Vol 43 ◽  
Author(s):  
David Spurrett
Keyword(s):  
Functional Activity ◽  
Degrees Of Freedom ◽  
The Body ◽  
Target Article ◽  
Processing Demands ◽  
The Many

Abstract Comprehensive accounts of resource-rational attempts to maximise utility shouldn't ignore the demands of constructing utility representations. This can be onerous when, as in humans, there are many rewarding modalities. Another thing best not ignored is the processing demands of making functional activity out of the many degrees of freedom of a body. The target article is almost silent on both.

The Many Faces of Socioeconomic Change

2017 ◽  
Author(s):  
John Toye
Keyword(s):  
Socioeconomic Development ◽  
Adam Smith ◽  
First Century ◽  
Social Progress ◽  
Long Time ◽  
The Face ◽  
Scientific Expertise ◽  
The Many ◽  
Century Development

This book provides a survey of different ways in which economic sociocultural and political aspects of human progress have been studied since the time of Adam Smith. Inevitably, over such a long time span, it has been necessary to concentrate on highlighting the most significant contributions, rather than attempting an exhaustive treatment. The aim has been to bring into focus an outline of the main long-term changes in the way that socioeconomic development has been envisaged. The argument presented is that the idea of socioeconomic development emerged with the creation of grand evolutionary sequences of social progress that were the products of Enlightenment and mid-Victorian thinkers. By the middle of the twentieth century, when interest in the accelerating development gave the topic a new impetus, its scope narrowed to a set of economically based strategies. After 1960, however, faith in such strategies began to wane, in the face of indifferent results and general faltering of confidence in economists’ boasts of scientific expertise. In the twenty-first century, development research is being pursued using a research method that generates disconnected results. As a result, it seems unlikely that any grand narrative will be created in the future and that neo-liberalism will be the last of this particular kind of socioeconomic theory.

scholarly journals Digital Technologies To Enhance Social Connectedness in Long-Term Care Facilities During COVID-19: A Review

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 942-943
Author(s):  
Shannon Freeman ◽  
Aderonke Abgoji ◽  
Alanna Koopmans ◽  
Christopher Ross
Keyword(s):  
Social Isolation ◽  
Rural Areas ◽  
Social Connectedness ◽  
Long Term Care ◽  
Care Facility ◽  
Well Being ◽  
Sufficient Information ◽  
Term Care ◽  
Care Facilities

Abstract A consequence of the strict visitor restrictions implemented by many Long-term Care Facilities (LTCFs), during the COVID-19 pandemic, was the exacerbation of loneliness and social isolation felt by older adult residents. While there had been a shift by some persons to utilize digital solutions to mitigate the effects of the imposed social isolation, many facilities did not have sufficient information regarding available solutions to implement institutional strategies to support social connectedness through digital solutions. To support our partners in evidence-based policy-making we conducted a scoping review to identify existing virtual technology solutions, apps, and platforms feasible to promote social connectedness among persons residing in a long-term care facility context during times of lockdown such as experienced during the COVID-19 pandemic. Initial identification of relevant literature involved a combination of keywords and subject headings searches within 5 databases (PubMed, CINAHL EBSCO, PsychINFO EBSCO, Embase OVIDSP, and Web of Science ISI). DistillerSR was used to screen, chart and summarize the data. There is growth in the availability of technologies focused on promoting health and well-being in later life for persons in long-term care facilities however a gap remains in widespread uptake. We will describe the breadth of technologies identified in this review and discuss how they vary in utility in smaller scale facilities common in rural areas. Of the technologies that can be used to mitigate the impacts of social isolation felt by long-term care residents, many “solutions” depend on stable highspeed internet, which remains a challenge in rural and northern areas.

Prevalence and Correlates of Gray Market Use for Aging and Dementia Long-Term Care in the U.S

2021 ◽  
pp. 073346482110236
Author(s):  
Regina A. Shih ◽  
Esther M. Friedman ◽  
Emily K. Chen ◽  
Grace C. Whiting
Keyword(s):  
Rural Areas ◽  
Long Term Care ◽  
Term Care ◽  
Unpaid Care ◽  
Gray Market ◽  
Sociodemographic Correlates ◽  
Nationally Representative ◽  
National Prevalence ◽  
The U.S

Objectives To estimate the national prevalence and sociodemographic correlates of gray market utilization, consisting of paid providers who are unrelated to the recipient, not working for a regulated agency, and potentially unscreened and untrained, for aging and dementia-related long-term care. Methods We surveyed a nationally representative sample of 1,037 American Life Panel respondents aged 18 years and older. Results Nearly a third of Americans who arranged paid care sought gray market care for persons with dementia, and most (65%) combined it with unpaid care. Respondents who arranged gray market care had 66% lower odds of currently working, and those living in rural areas had an almost 5-times higher odds of arranging dementia gray market care. Discussion Gray market care represents a substantial proportion of paid, long-term care for older adults and may fill gaps in access to care.

scholarly journals LifePlanning: A Better Retirement Planning Option for Our Times

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 111-112
Author(s):  
Rajiv Nagaich ◽  
Carol Redfield ◽  
Ben Harvill
Keyword(s):  
Institutional Care ◽  
Integrated Approach ◽  
Retirement Planning ◽  
Practice Research ◽  
Care Needs ◽  
Term Care ◽  
Investment Returns ◽  
The Many ◽  
In The Beginning

Abstract Ten thousand turn 65 daily. Majority look forward to retiring in the beginning and then become afraid of outcomes they often hear about- dealing with institutional care, becoming a burden, or running out of money. This is not because retirees do not plan, but despite of having planned their entire life for retirement. Many employers provide financial retirement planning such as a 401K plan. Individuals have relied on employee benefit plans to ready themselves, yet few are “very confident” about it. Two-thirds of retirees say their most recent employers did “nothing” to help them transition into retirement; 16% are “not sure” what their employers did. Many may be overlooking important factors in their strategies. Among retirees who currently have a retirement strategy, 85% have factored Social Security and Medicare benefits into their strategy. Most have included on-going living expenses (79%), total savings and income needs (57%) into their plan. Fewer than half have considered other critical factors (e.g., investment returns, ongoing healthcare costs, inflation, long-term care needs, tax planning, etc.). Only 9% have contingency plans for retiring sooner than expected and/or savings shortfalls. The truth is that education offered by employers tends to be traditional planning advice, which may not be enough to address the concerns retirees will have in retirement. To this, we introduce a multi-disciplinary LifePlanning Framework which takes a wholistic, integrated approach in addressing the many complex issues of retirement found in health, housing, finance, legal, and family. Our results may impact future practice, research, and policy.

scholarly journals Radiation Necrosis of the Lateral Skull Base and Temporal Bone

2020 ◽  
Vol 34 (04) ◽  
pp. 265-271
Author(s):  
Marc W. Herr ◽  
Aurora G. Vincent ◽  
Meghan A. Skotnicki ◽  
Yadranko Ducic ◽  
Spiros Manolidis
Keyword(s):  
Radiation Therapy ◽  
Temporal Bone ◽  
Radiation Necrosis ◽  
Critical Role ◽  
Therapeutic Effects ◽  
Normal Tissues ◽  
Lateral Skull Base ◽  
The Many ◽  
Work Up

AbstractRadiation therapy plays a critical role in the treatment of malignancies involving the head and neck. Although the therapeutic effects of ionizing radiation are achieved, normal tissues are also susceptible to injury and significant long-term sequelae. Osteoradionecrosis of the temporal bone (ORNTB) is among the many complications that can arise after therapy. ORNTB is a debilitating and potentially lethal condition that continues to challenge patients and treating physicians. Herein, we review the pathophysiology, presentation, work-up, and management of ORNTB.

scholarly journals Learning about Stellar Dynamos from Long–term Photometry of Starspots

1991 ◽  
Vol 130 ◽  
pp. 353-369 ◽  
Author(s):  
Douglas S. Hall
Keyword(s):  
Differential Rotation ◽  
Rotation Period ◽  
Turnover Time ◽  
Rotating Stars ◽  
Photometric Variability ◽  
Solar Type ◽  
Magnetic Cycles ◽  
The Many ◽  
Rapidly Rotating Stars

AbstractSpottedness, as evidenced by photometric variability in 277 late-type binary and single stars, is found to occur when the Rossby number is less than about 2/3. This holds true when the convective turnover time versus B–V relation of Gilliland is used for dwarfs and also for subgiants and giants if their turnover times are twice and four times longer, respectively, than for dwarfs. Differential rotation is found correlated with rotation period (rapidly rotating stars approaching solid-body rotation) and also with lobe-filling factor (the differential rotation coefficient k is 2.5 times larger for F = 0 than F = 1). Also reviewed are latitude extent of spottedness, latitude drift during a solar-type cycle, sector structure and preferential longitudes, starspot lifetimes, and the many observational manifestations of magnetic cycles.

scholarly journals Reframing Aging in Contemporary Politics: Building Momentum

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 681-681
Author(s):  
Patricia D'Antonio
Keyword(s):  
Social Change ◽  
Older People ◽  
Evidence Based ◽  
Negative Attitudes ◽  
Attitudes And Behaviors ◽  
Contemporary Politics ◽  
Perceptions Of Aging ◽  
The Many ◽  
Changing Attitudes

Abstract Changing American culture is challenging and changing attitudes and behaviors around the universal experience of aging especially so. Unless the field of advocates who care about aging issues cultivates a more visible, more informed conversation on older people, it will remain difficult to advance the systemic changes needed to adjust to a society with increased and increasing longevity. Advocates will need to be vigilant to avoid cueing negative attitudes towards aging and aging policies. The Reframing Aging Initiative is a long-term, social change endeavor designed to improve the public’s understanding of what aging means and the many contributions older people bring to society. Using evidence-based research, the initiative seeks to teach advocates how to tell an effective story about aging that will promote positive perceptions of aging and reduce ageism. The time to change the conversation is now.

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