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Sample records for justin stiff senior

  1. Justine user`s manual

    Energy Technology Data Exchange (ETDEWEB)

    Lee, S.R.

    1995-10-01

    Justine is the graphical user interface to the Los Alamos Radiation Modeling Interactive Environment (LARAMIE). It provides LARAMIE customers with a powerful, robust, easy-to-use, WYSIWYG interface that facilitates geometry construction and problem specification. It is assumed that the reader is familiar with LARAMIE, and the transport codes available, i.e., MCNPTM and DANTSYSTM. No attempt is made in this manual to describe these codes in detail. Information about LARAMIE, DANTSYS, and MCNP are available elsewhere. It i also assumed that the reader is familiar with the Unix operating system and with Motif widgets and their look and feel. However, a brief description of Motif and how one interacts with it can be found in Appendix A.

  2. Kroonika esitleb : Justin Timberlake ja Rod Stewart / Justin Timberlake ; interv. Katrin Lust-Buchanan

    Index Scriptorium Estoniae

    Timberlake, Justin

    2006-01-01

    Meesteajakirja GQ auhindade jagamise tseremoonial Londonis sai ajakirja Kroonika reporter jutule aasta rahvusvahelisima mehe tiitli pälvinud Justin Timberlake'i ja elutööpreemia saanud Rod Stewartiga

  3. Justin Bieber - en toneangivende formidler til tweens

    OpenAIRE

    Lundeby, Maria Celine Kolberg

    2014-01-01

    Ønsket mitt med oppgaven har vært å skape en bevissthet om at populærkulturen er en formidler av noe, og at dette noe bærer i seg potensialet til å ha direkte betydning for vanlige menneskers liv. Gjennom dette utblikket har målet vært å synliggjøre noen eksempler på hvordan det som formidles kan bli gode innfallsvinkler til samtaler om og forkynnelse av kristen tro til tweens. Selv om denne oppgaven har tatt utgangspunkt i et veldig konkret eksempel, Justin Bieber, er de grunnleg...

  4. Justin Ukpongs Jesus. Emmanuel for our times

    Directory of Open Access Journals (Sweden)

    Tshehla, Maarman S

    2015-12-01

    Full Text Available Africa has a long association with the BibleAt the time of Jesus, the Bible was being read in AfricaSince then, the Bible has continued to be read in Africa (Mbiti 1994:27. Jesus Christ is the key character with which many who come to the Bible are concerned, academics as well as countless ordinary readers. Beyond the methodological considerations wherein this leading African chronicler of African Biblical Hermeneutics has made an immense contribution, what specific insights might we glean from Justin Ukpongs work about the Jesus of the canonical evangelists vis-vis our work as organic intellectuals? What does Ukpongs Jesus offer present-day South Africa, if one with a missiological interest may extrapolate?

  5. Anaphoric Reference in Justin Bieber's Album “Believe Acoustic”

    OpenAIRE

    Situmorang, Hisarmauli Desi Natalina; Natsir, Muhammad

    2014-01-01

    This research focused on anaphoric reference used in Justin Bieber's Album “Believe Acoustic”. The research conducted by using descriptive qualitative method. The data was collected from the Justin Bieber's album “Believe Acoustic”. The finding of the thesis show that there are 64 lines (sentence, phrase) that consist of 3 anaphoric reference which are anaphora (10), cataphora (6), and zero anaphora (48). The most dominant types is zero anaphora, which means the writer want to create an impli...

  6. Seniority isomerism in proton-rich N=82 nuclei and its indication to stiffness of the Z=64 subshell

    International Nuclear Information System (INIS)

    Matsuzawa, T.; Nakada, H.; Ogawa, K.; Momoki, G.

    2000-01-01

    The 10 + and 27/2 - isomers of the Z > 64, N=82 nuclei are investigated in the shell model framework. We derive an extended seniority reduction formula (ExSRF) for the relevant E2 transition strengths. We argue that the B(E2) data based on the ExSRF require the proton excitation from 146 Gd core. The energy levels and the B(E2) values are reproduced simultaneously by a multi-j shell model calculation, if the excitations from (0g 7/2 1d 5/2 ) to (2s 1/2 0h 11/2 1d 3/2 ) are taken into account. (author)

  7. Sugar Free with Justin T.: Diabetes Education through Community Partnerships

    Science.gov (United States)

    Thomas, Justin B.; Donaldson, Joseph L.

    2014-01-01

    This article describes the design, development, and delivery of an Extension community cable television program, "Sugar Free with Justin T.," in Roane County, Tennessee. The program targets diabetics, pre-diabetics, and those who care for them, with practical information and demonstrations to improve dietary quality. In addition to…

  8. Visualization of geometry and tally data using MCNP and Justine

    International Nuclear Information System (INIS)

    Cox, L.J.; Favorite, J.A.

    1999-01-01

    The Monte Carlo N-Particle (MCNP) transport code is a general-purpose code that can be used for neutron, photon, electron, or coupled neutron/photon/electron transport, including the capability to calculate eigenvalues for neutron-multiplying systems. The code treats an arbitrary three-dimensional configuration of materials in geometric cells bounded by first- and second-degree surfaces and fourth-degree elliptical tori. Justine is the graphical user interface and problem setup tool for the Los Alamos Radiation Modeling Interactive Environment (LARAMIE). Its purpose is to serve as a convenient and very general interface for setting up physics calculations and linking together the disparate radiation transport codes under a single front-end. Currently, the LARAMIE system includes MCNP and the deterministic transport code suit DANTSYS (ONEDANT, TWODANT, and THREEDANT, for one-, two-, and three-dimensional geometries, respectively). Justine is currently available through the Radiation Safety Information Computational Center to members of the criticality safety community for evaluation and use. The authors will demonstrate the capabilities of both codes for visualization of geometries and results from a variety of criticality problems

  9. Senior Benefits

    Science.gov (United States)

    Information Medicaid Public Health Centers Temporary "Cash" Assistance Senior Benefits Program GovDelivery Skip Navigation Links Health and Social Services > Public Assistance > Senior Benefits Page Content Senior Benefits Senior Benefits Logo Senior Benefits Fact Sheet - June, 2016 Reduction Information

  10. Abject Magic: Reasoning Madness in Justine Larbalestier's "Magic or Madness" Trilogy

    Science.gov (United States)

    Potter, Troy

    2013-01-01

    This paper explores the representation of magic and madness in Justine Larbalestier's "Magic or Madness" trilogy (2005-2007). Throughout the series, magic is constructed as an abject and disabling force that threatens to disable magic-wielders, either through madness or death. Despite being represented as a ubiquitous force, the…

  11. Adventures from Justin's Life: Engaging Your Physics Students

    Science.gov (United States)

    Ridgley, James A.; Herron, Sherry S.

    2018-03-01

    Many teachers have had students ask the proverbial question, "When will I ever use this in my life?" In the sciences, especially physics, teachers seem to battle this torrent of indifference continually. Although many areas of our students' lives can distract them from their academic pursuits, we as teachers must be introspective in order to prevent our teaching style from becoming one of our students' potential distractions. For example, a problem source with teaching physics may be an inability to successfully pique students' interest in our lessons. According to Barrett, student engagement is critical in order for learning to occur. Student engagement is so crucially important that researchers from across the globe attempt to assist teachers in the careful construction of pedagogical "hooks" whereby they can actively engage their students. A student who is not academically engaged may find little use for what is presented and may be bored stiff during the lesson. Regardless of your theoretical perspectives on learning, constructivists to traditionalists alike have no excuse to be boring, and therefore should engage their students before presenting physics concepts.

  12. Justin Bieber, do doc ao Instagram: a estetização da vida

    Directory of Open Access Journals (Sweden)

    Denise Tavares

    2013-12-01

    Full Text Available Alguns documentários biográficos de celebridades reafirmam um modelo de produção audiovisual que encerra a história de vida no show e na fama, articulando o tensionamento entre biografia, tecnologia, experiência estética e afeto. Tais imbricamentos são ainda mais visíveis quando considerada a fruição desta celebridade, “consumida” em outras possibilidades biográficas que remixa webvideos postados no Youtube e/ou fotos no Instagram. Para discutir estas questões, o artigo destaca Justin Bieber, tendo como ponto de partida o documentário Justin Bieber – Never Say Never (2011, de Jon M. Chu e o Instagram, em um recorte que privilegia a experiência dos desejos dos fãs.

  13. Justin Bieber, do doc ao Instagram: a estetização da vida

    OpenAIRE

    Tavares, Denise; Pinto, Raphael

    2013-01-01

    Alguns documentários biográficos de celebridades reafirmam um modelo de produção audiovisual que encerra a história de vida no show e na fama, articulando o tensionamento entre biografia, tecnologia, experiência estética e afeto. Tais imbricamentos são ainda mais visíveis quando considerada a fruição desta celebridade, “consumida” em outras possibilidades biográficas que remixa webvideos postados no Youtube e/ou fotos no Instagram. Para discutir estas questões, o artigo destaca Justin Bieber,...

  14. On the Social Nature of Objectivity: Helen Longino and Justin Biddle

    Directory of Open Access Journals (Sweden)

    Jaana Eigi

    2015-11-01

    Full Text Available According to Helen Longino, objectivity is necessarily social as it depends on critical interactions in community. Justin Biddle argues that Longino’s account presupposes individuals that are completely open to any criticism; as such individuals are in principle able to criticise their beliefs on their own, Longino's account is not really social. In the first part of my paper I argue that even for completely open individuals, criticism for maintaining objectivity is only possible in community. In the second part I challenge Biddle’s interpretation of Longino’s conception of the individual. I conclude that Longino’s account is necessarily social.

  15. Stiff Hands

    Science.gov (United States)

    ... All Topics A-Z Videos Infographics Symptom Picker Anatomy Bones Joints Muscles Nerves Vessels Tendons About Hand Surgery What is a Hand Surgeon? What is a Hand Therapist? Media Find a Hand Surgeon Home Anatomy Stiff Hands Email to a friend * required fields ...

  16. The battle for Yellowstone: Morality and the  sacred roots of environmental conflict, by Justin Farrell

    Science.gov (United States)

    John Schelhas

    2017-01-01

    A growing number of intractable environmental conflicts involving interest groups with deeply held beliefs are resisting resolution in spite of extensive scientific analysis and legal and bureaucratic attention. Justin Farrell addresses three such conflicts in the Greater Yellowstone Ecosystem (GYE) as moral and spiritual conflicts, each uniquely animated by history,...

  17. The Victorian Philanthropic Quixote: Donna Quixote, by Justin McCarthy

    Directory of Open Access Journals (Sweden)

    Pedro Javier Pardo

    2012-12-01

    Full Text Available The paper undertakes the analysis of a little known Victorian quixotic novel, Donna Quixote, by Justin McCarthy. In so doing, it places the latter, in the first place, within the conception of quixotism characteristic of the Victorian age and, in the second place, within the previous tradition of female quixotes, particularly as a response to George Eliot’s Middlemarch. Then, the text studies the novel’s originality within the English quixotic tradition, which lies in the way it relates quixotism to both philanthropy and feminism, not just by means of the heroine but also of some quixotic secondary figures, and argues the author’s conservative position in the debate on women’s rights known as the woman question. Finally, the paper illustrates such a position and its ideological context by presenting another “Donna Quixote,” in this case a satiric cartoon on the so-called new woman.

  18. Justine Effect: Punishment of the Unduly Self-Sacrificing Cooperative Individuals

    Science.gov (United States)

    Kuběna, Aleš Antonín; Houdek, Petr; Lindová, Jitka; Příplatová, Lenka; Flegr, Jaroslav

    2014-01-01

    Background Allowing players to punish their opponents in Public Goods Game sustains cooperation within a group and thus brings advantage to the cooperative individuals. However, the possibility of punishment of the co-players can result in antisocial punishment, the punishment of those players who contribute the most in the group. To better understand why antisocial punishment exists, it must be determined who are the anti-social punishers and who are their primary targets. Methods For resolving these questions we increased the number of players in a group from usual four to twelve. Each group played six rounds of the standard Public Goods Game and six rounds of the Public Goods Game with punishment. Each player in each round received 20 CZK ($ 1.25). Players (N = 118) were rematched after each round so that they would not take into consideration opponents' past behavior. Results The amount of the punishment received correlated negatively with the contribution (ρ = −0.665, ppunishment obtained was U-shaped (R2 = 0.678, ppunishment was present in all groups, and in eight out of ten groups the Justine Effect (the positive correlation between the contribution to the public pool and the risk of suffering punishment in the subpopulation of altruistic players) emerged. In our sample, 22.5% subjects, all of them Free riders and low contributors, punished the altruistic players. Conclusions The results of our experimental game-study revealed the existence of the Justine effect – the positive correlation between the contribution to the public pool by a subpopulation of the most altruistic players, and the amount of punishment these players obtained from free-riders. PMID:24670974

  19. Justine effect: punishment of the unduly self-sacrificing cooperative individuals.

    Science.gov (United States)

    Kuběna, Aleš Antonín; Houdek, Petr; Lindová, Jitka; Příplatová, Lenka; Flegr, Jaroslav

    2014-01-01

    Allowing players to punish their opponents in Public Goods Game sustains cooperation within a group and thus brings advantage to the cooperative individuals. However, the possibility of punishment of the co-players can result in antisocial punishment, the punishment of those players who contribute the most in the group. To better understand why antisocial punishment exists, it must be determined who are the anti-social punishers and who are their primary targets. For resolving these questions we increased the number of players in a group from usual four to twelve. Each group played six rounds of the standard Public Goods Game and six rounds of the Public Goods Game with punishment. Each player in each round received 20 CZK ($ 1.25). Players (N = 118) were rematched after each round so that they would not take into consideration opponents' past behavior. The amount of the punishment received correlated negatively with the contribution (ρ = -0.665, pboarder of the upper quartile. The antisocial punishment was present in all groups, and in eight out of ten groups the Justine Effect (the positive correlation between the contribution to the public pool and the risk of suffering punishment in the subpopulation of altruistic players) emerged. In our sample, 22.5% subjects, all of them Free riders and low contributors, punished the altruistic players. The results of our experimental game-study revealed the existence of the Justine effect--the positive correlation between the contribution to the public pool by a subpopulation of the most altruistic players, and the amount of punishment these players obtained from free-riders.

  20. Arterial stiffness

    Directory of Open Access Journals (Sweden)

    Ursula Quinn

    2012-09-01

    Full Text Available Measurements of biomechanical properties of arteries have become an important surrogate outcome used in epidemiological and interventional cardiovascular research. Structural and functional differences of vessels in the arterial tree result in a dampening of pulsatility and smoothing of blood flow as it progresses to capillary level. A loss of arterial elastic properties results a range of linked pathophysiological changes within the circulation including increased pulse pressure, left ventricular hypertrophy, subendocardial ischaemia, vessel endothelial dysfunction and cardiac fibrosis. With increased arterial stiffness, the microvasculature of brain and kidneys are exposed to wider pressure fluctuations and may lead to increased risk of stroke and renal failure. Stiffening of the aorta, as measured by the gold-standard technique of aortic Pulse Wave Velocity (aPWV, is independently associated with adverse cardiovascular outcomes across many different patient groups and in the general population. Therefore, use of aPWV has been proposed for early detection of vascular damage and individual cardiovascular risk evaluation and it seems certain that measurement of arterial stiffness will become increasingly important in future clinical care. In this review we will consider some of the pathophysiological processes that result from arterial stiffening, how it is measured and factors that may drive it as well as potential avenues for therapy. In the face of an ageing population where mortality from atheromatous cardiovascular disease is falling, pathology associated with arterial stiffening will assume ever greater importance. Therefore, understanding these concepts for all clinicians involved in care of patients with cardiovascular disease will become vital.

  1. Justine effect: punishment of the unduly self-sacrificing cooperative individuals.

    Directory of Open Access Journals (Sweden)

    Aleš Antonín Kuběna

    Full Text Available Allowing players to punish their opponents in Public Goods Game sustains cooperation within a group and thus brings advantage to the cooperative individuals. However, the possibility of punishment of the co-players can result in antisocial punishment, the punishment of those players who contribute the most in the group. To better understand why antisocial punishment exists, it must be determined who are the anti-social punishers and who are their primary targets.For resolving these questions we increased the number of players in a group from usual four to twelve. Each group played six rounds of the standard Public Goods Game and six rounds of the Public Goods Game with punishment. Each player in each round received 20 CZK ($ 1.25. Players (N = 118 were rematched after each round so that they would not take into consideration opponents' past behavior.The amount of the punishment received correlated negatively with the contribution (ρ = -0.665, p<0.001. However, this correlation was positive for players in the highest contributors-quartile (ρ = 0.254, p<0.001. Therefore, the graph of relation between the contribution given and punishment obtained was U-shaped (R2 = 0.678, p<0.001 with the inflection point near the left boarder of the upper quartile. The antisocial punishment was present in all groups, and in eight out of ten groups the Justine Effect (the positive correlation between the contribution to the public pool and the risk of suffering punishment in the subpopulation of altruistic players emerged. In our sample, 22.5% subjects, all of them Free riders and low contributors, punished the altruistic players.The results of our experimental game-study revealed the existence of the Justine effect--the positive correlation between the contribution to the public pool by a subpopulation of the most altruistic players, and the amount of punishment these players obtained from free-riders.

  2. Sexede seniorer

    DEFF Research Database (Denmark)

    Oxlund, Bjarke

    2010-01-01

    Aldring og seksualitet er begreber, der sjældent optræder i samme sætning. Det skyldes, at ældre menneskers seksuelle aktivitet længe har et tabuiseret felt. Nyere forskning dokumenterer imidlertid, at der er god grund til at se nærmere på de sexede seniorer, for ældre mennesker giver i stigende...

  3. Estimating Gear Teeth Stiffness

    DEFF Research Database (Denmark)

    Pedersen, Niels Leergaard

    2013-01-01

    The estimation of gear stiffness is important for determining the load distribution between the gear teeth when two sets of teeth are in contact. Two factors have a major influence on the stiffness; firstly the boundary condition through the gear rim size included in the stiffness calculation...... and secondly the size of the contact. In the FE calculation the true gear tooth root profile is applied. The meshing stiffness’s of gears are highly non-linear, it is however found that the stiffness of an individual tooth can be expressed in a linear form assuming that the contact length is constant....

  4. Ruminating on Justin S. Ukpong’s inculturation hermeneutics and its implications for the study of African Biblical Hermeneutics today

    Directory of Open Access Journals (Sweden)

    Madipoane Masenya (ngwan’a Mphahlele

    2016-11-01

    Full Text Available In African biblical scholarship, the concept of inculturation hermeneutics has come to be almost, if not always, linked to the late Professor Justin S. Ukpong, the Nigerian New Testament scholar. In inculturation hermeneutics, argued Ukpong, the past of the biblical text is not supposed to be studied as an end in itself, but as a means to an end. Ukpong (2002 could thus argue: ‘Thus in inculturation hermeneutics, the past collapses into the present, and exegesis fuses with hermeneutics’ (p. 18. What does Ukpong’s concept of inculturation hermeneutics actually entail? Which implications does his notion of the fusion of exegesis and hermeneutics have for the theory and praxis of African Biblical Hermeneutics particularly on the African continent today? The preceding questions will be engaged with in this article.

  5. Senior and Disabilities Services

    Science.gov (United States)

    State Employees Division of Senior and Disabilities Services DHSS State of Alaska Home Divisions and ; Assistance Senior Benefits Program Medicare Substance Abuse Treatment Alaska Tribal Child Welfare Compact ; Senior and Disabilities Services Page Content Director Duane Mayes photo image. Duane Mayes Director

  6. Air Force Senior Leaders

    Science.gov (United States)

    Force TV Radio Week in Photos About Us Air Force Senior Leaders SECAF CSAF CMSAF Biographies Adjunct Professors Senior Mentor Biographies Fact Sheets Commander's Call Topics CCT Archive CSAF Reading List 2017 Media Sites Site Registration Contact Us Search AF.mil: Home > About Us > Air Force Senior Leaders

  7. INTERNET AND SENIORS

    Directory of Open Access Journals (Sweden)

    Rain, Tomáš

    2010-12-01

    Full Text Available The article deals about the possibilities of using the internet for seniors. Authors suggest using www pages as alternative of retrospective therapy. Authors describe barriers of internet access for seniors. The authors of the article consider about utilization of internet for the reminiscent therapy of seniors. The target group of this article are the workers of the information centres, gerontopeds and the other persons working as the pedagogues. The objective of this article is to summarize ways of using internet for helping seniors to better life. The authors describe terms e-senior. The authors suggest methodological approach to exercising user’s skills.

  8. Posttraumatic stiff elbow

    Directory of Open Access Journals (Sweden)

    Ravi Mittal

    2017-01-01

    Full Text Available Posttraumatic stiff elbow is a frequent and disabling complication and poses serious challenges for its management. In this review forty studies were included to know about the magnitude of the problem, causes, pathology, prevention, and treatment of posttraumatic stiff elbow. These studies show that simple measures such as internal fixation, immobilization in extension, and early motion of elbow joint are the most important steps that can prevent elbow stiffness. It also supports conservative treatment in selected cases. There are no clear guidelines about the choice between the numerous procedures described in literature. However, this review article disproves two major beliefs-heterotopic ossification is a bad prognostic feature, and passive mobilization of elbow causes elbow stiffness.

  9. Effective communication with seniors

    OpenAIRE

    PONCAROVÁ, Ester

    2008-01-01

    My bachelor thesis is called "The Effective Communication With Seniors". The aim of this thesis is to describe communication, its various kinds and the basic principles of the effective communication. I will also describe the communication with seniors suffering from dementia. Another aim of this thesis is to find out whether workers in the senior houses know and use the principles of the effective communication.

  10. INTERNET AND SENIORS

    OpenAIRE

    Rain, Tomáš; Ivana Švarcová

    2010-01-01

    The article deals about the possibilities of using the internet for seniors. Authors suggest using www pages as alternative of retrospective therapy. Authors describe barriers of internet access for seniors. The authors of the article consider about utilization of internet for the reminiscent therapy of seniors. The target group of this article are the workers of the information centres, gerontopeds and the other persons working as the pedagogues. The objective of this article is to summarize...

  11. Reclaiming Senior Year

    Science.gov (United States)

    D'Andrea, Kathleen

    2005-01-01

    The new learning opportunities that feed mind, body and soul helps the senior students develop the resiliency and intellectual qualities they need to make a healthy transition to post-high school life. The Monsignor Donovan High School in Toms River, New Jersey, has provided creative learning opportunities to seniors, which has planted in them the…

  12. Stiff quantum polymers

    OpenAIRE

    Kleinert, H.

    2009-01-01

    At ultralow temperatures, polymers exhibit quantum behavior, which is calculated here for the second and fourth moments of the end-to-end distribution in the large-stiffness regime. The result should be measurable for polymers in wide optical traps.

  13. Relationship between Static Stiffness and Modal Stiffness of Structures

    Directory of Open Access Journals (Sweden)

    Tianjian Ji Tianjian Ji

    2010-02-01

    Full Text Available This paper derives the relationship between the static stiffness and modal stiffness of a structure. The static stiffness and modal stiffness are two important concepts in both structural statics and dynamics. Although both stiffnesses indicate the capacity of the structure to resist deformation, they are obtained using different methods. The former is calculated by solving the equations of equilibrium and the latter can be obtained by solving an eigenvalue problem. A mathematical relationship between the two stiffnesses was derived based on the definitions of two stiffnesses. This relationship was applicable to a linear system and the derivation of relationships does not reveal any other limitations. Verification of the relationship was given by using several examples. The relationship between the two stiffnesses demonstrated that the modal stiffness of the fundamental mode was always larger than the static stiffness of a structure if the critical point and the maximum mode value are at the same node, i.e. for simply supported beam and seven storeys building are 1.5% and 15% respectively. The relationship could be applied into real structures, where the greater the number of modes being considered, the smaller the difference between the modal stiffness and the static stiffness of a structure.

  14. Nomenclatural Studies Toward a World List of Diptera Genus-Group Names. Part V: Pierre-Justin-Marie Macquart.

    Science.gov (United States)

    Evenhuis, Neal L; Pape, Thomas; Pont, Adrian C

    2016-09-30

    The Diptera genus-group names of Pierre-Justin-Marie Macquart are reviewed and annotated. A total of 399 available genus-group names in 69 families of Diptera are listed alphabetically, for each name giving author, year and page of original publication, originally included species, type species and method of fixation, current status of the name, family placement, and a list of any emendations of it that have been found in the literature. Remarks are given to clarify nomenclatural or taxonomic information. In addition, an index to all the species-group names of Diptera proposed by Macquart (3,611, of which 3,543 are available) is given with bibliographic reference (year and page) to each original citation.        The following type species are designated herein: Agculocera nigra Macquart, 1855 for Onuxicera Macquart, 1855, present designation [Tachinidae]; Trixa imhoffi Macquart, 1834, for Semiomyia Macquart, 1848, present designation [Tachinidae].        The following type species are designated herein with fixation under ICZN Code Art. 70.3.2: Azelia nebulosa Robineau-Desvoidy, 1830 for Atomogaster Macquart, 1835, present designation [Muscidae]; Tachydromia vocatoria Fallén, 1816 for Chelipoda Macquart, 1835, present designation [Empididae]; Eriocera macquarti Enderlein, 1912 for Eriocera Macquart, 1838, present designation [Limoniidae]; Limosina acutangula Zetterstedt, 1847 for Heteroptera Macquart, 1835, present designation [Sphaeroceridae]; Phryxe pavoniae Robineau-Desvoidy, 1830 for Masicera Macquart, 1834, present designation [Tachinidae]; Pachymyia macquartii Townsend, 1916 for Pachymyia Macquart, 1844, present designation [Tachinidae].        Earlier valid subsequent type-species designations have been found in this study for the following: Anisophysa Macquart, 1835 [Sepsidae]; Diphysa Macquart, 1838 [Stratiomyidae]; Pachyrhina Macquart, 1834 [Tipulidae]; Silbomyia Macquart, 1844 [Calliphoridae].        One name is raised from

  15. Seniority isomers in nuclei

    International Nuclear Information System (INIS)

    Van Isacker, P

    2011-01-01

    Seniority isomers are nuclear states with an electromagnetic decay that is hindered by selection rules related to the seniority quantum number. A simple analysis is presented of their possible formation with reference to the nickel isotopes 70–76 Ni and the N = 50 isotones from molybdenum to cadmium. It is shown that the existence of seniority isomers in a j = 9/2 shell is predominantly governed by the quadrupole pairing matrix element of the nucleon-nucleon interaction. The analysis is generalized to shells with larger j.

  16. On gear tooth stiffness evaluation

    DEFF Research Database (Denmark)

    Pedersen, Niels Leergaard; Jørgensen, Martin Felix

    2014-01-01

    The estimation of gear stiffness is important for determining the load distribution between the gear teeth when two sets of teeth are in contact. Two factors have a major influence on the stiffness; firstly the boundary condition through the gear rim size included in the stiffness calculation...

  17. Housing Options for Seniors

    Science.gov (United States)

    ... Kids and Teens Pregnancy and Childbirth Women Men Seniors Your Health Resources Healthcare Management End-of-Life Issues Insurance & Bills Self Care Working With Your Doctor Drugs, Procedures & Devices Over-the- ...

  18. Senior Leader Credibility

    National Research Council Canada - National Science Library

    Moosmann, Christopher

    2000-01-01

    .... Leadership at senior levels involves a different type of work than at lower organizational levels and this requires leaders to possess a different set of skills, knowledge, and attributes in order to be successful...

  19. 5 CFR 842.211 - Senior Executive Service, Defense Intelligence Senior Executive Service, and Senior Cryptologic...

    Science.gov (United States)

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Senior Executive Service, Defense Intelligence Senior Executive Service, and Senior Cryptologic Executive Service. 842.211 Section 842.211... EMPLOYEES RETIREMENT SYSTEM-BASIC ANNUITY Eligibility § 842.211 Senior Executive Service, Defense...

  20. Stiffness, resilience, compressibility

    Energy Technology Data Exchange (ETDEWEB)

    Leu, Bogdan M. [Argonne National Laboratory, Advanced Photon Source (United States); Sage, J. Timothy, E-mail: jtsage@neu.edu [Northeastern University, Department of Physics and Center for Interdisciplinary Research on Complex Systems (United States)

    2016-12-15

    The flexibility of a protein is an important component of its functionality. We use nuclear resonance vibrational spectroscopy (NRVS) to quantify the flexibility of the heme iron environment in the electron-carrying protein cytochrome c by measuring the stiffness and the resilience. These quantities are sensitive to structural differences between the active sites of different proteins, as illustrated by a comparative analysis with myoglobin. The elasticity of the entire protein, on the other hand, can be probed quantitatively from NRVS and high energy-resolution inelastic X-ray scattering (IXS) measurements, an approach that we used to extract the bulk modulus of cytochrome c.

  1. Senior radio listeners

    DEFF Research Database (Denmark)

    Blaakilde, Anne Leonora

    Radiobroadcasting and the hardware materialization of radio have during the 20th century changed significantly, which means that senior radio listeners have travelled along with this evolution from large, impressive radio furnitures to DAB and small, wireless, mobile devices, and from grave...... and solemn radio voices to lightharted, laughing and chatting speakers. Senior radio listerners have experienced the development and refinements of technique, content and genres. It is now expected of all media users that they are capable of crossing media, combining, juggling and jumping between various...... media platforms, not the least when listening to radio. The elder generation is no exception from this. Recently, for instance, the Danish public broadcast DR has carried out an exodus of programmes targeted for the senior segment. These programmes are removed from regular FM and sent to DAB receivers...

  2. Pharmacological modulation of arterial stiffness.

    LENUS (Irish Health Repository)

    Boutouyrie, Pierre

    2011-09-10

    Arterial stiffness has emerged as an important marker of cardiovascular risk in various populations and reflects the cumulative effect of cardiovascular risk factors on large arteries, which in turn is modulated by genetic background. Arterial stiffness is determined by the composition of the arterial wall and the arrangement of these components, and can be studied in humans non-invasively. Age and distending pressure are two major factors influencing large artery stiffness. Change in arterial stiffness with drugs is an important endpoint in clinical trials, although evidence for arterial stiffness as a therapeutic target still needs to be confirmed. Drugs that independently affect arterial stiffness include antihypertensive drugs, mostly blockers of the renin-angiotensin-aldosterone system, hormone replacement therapy and some antidiabetic drugs such as glitazones. While the quest continues for \\'de-stiffening drugs\\

  3. Music Therapy for Seniors

    OpenAIRE

    SLUNEČKOVÁ, Petra

    2014-01-01

    This bachelor thesis deals with the use of music therapy in the lives of seniors. The target of this thesis is to map the possibilities of using music therapy ways with seniors and to recommend a suitable music therapy resources on the basis of the research and evaluation of obtained dates. The theoretical part describes the term "the music therapy", e.g. concept, definition, types and forms, the development of music therapy, the history, methods and techniques. This age group is defined in t...

  4. Simply computing for seniors

    CERN Document Server

    Clark, Linda

    2011-01-01

    Step-by-step instructions for seniors to get up and running on a home PC Answering the call for an up-to-date, straightforward computer guide targeted specifically for seniors, this helpful book includes easy-to-follow tutorials that escort you through the basics and shows you how to get the most out of your PC. Boasting an elegant, full-color interior with a clean, sophisticated look and feel, the layout makes it easy for you to find the information you need quickly. Author Linda Clark has earned her highly respected reputation through years of teaching computers at both the beginnin

  5. Dynamic stiffness of suction caissons

    DEFF Research Database (Denmark)

    Ibsen, Lars Bo; Liingaard, Morten; Andersen, Lars

    The purpose of this report is to evaluate the dynamic soil-structure interaction of suction caissons for offshore wind turbines. The investigation is limited to a determination of the vertical dynamic stiffness of suction caissons. The soil surrounding the foundation is homogenous with linear...... viscoelastic properties. The dynamic stiffness of the suction caisson is expressed by dimensionless frequency-dependent dynamic stiffness coefficients corresponding to the vertical degree of freedom. The dynamic stiffness coefficients for the foundations are evaluated by means of a dynamic three...

  6. Trabecular meshwork stiffness in glaucoma.

    Science.gov (United States)

    Wang, Ke; Read, A Thomas; Sulchek, Todd; Ethier, C Ross

    2017-05-01

    Alterations in stiffness of the trabecular meshwork (TM) may play an important role in primary open-angle glaucoma (POAG), the second leading cause of blindness. Specifically, certain data suggest an association between elevated intraocular pressure (IOP) and increased TM stiffness; however, the underlying link between TM stiffness and IOP remains unclear and requires further study. We here first review the literature on TM stiffness measurements, encompassing various species and based on a number of measurement techniques, including direct approaches such as atomic force microscopy (AFM) and uniaxial tension tests, and indirect methods based on a beam deflection model. We also briefly review the effects of several factors that affect TM stiffness, including lysophospholipids, rho-kinase inhibitors, cytoskeletal disrupting agents, dexamethasone (DEX), transforming growth factor-β 2 (TGF-β 2 ), nitric oxide (NO) and cellular senescence. We then describe a method we have developed for determining TM stiffness measurement in mice using a cryosection/AFM-based approach, and present preliminary data on TM stiffness in C57BL/6J and CBA/J mouse strains. Finally, we investigate the relationship between TM stiffness and outflow facility between these two strains. The method we have developed shows promise for further direct measurements of mouse TM stiffness, which may be of value in understanding mechanistic relations between outflow facility and TM biomechanical properties. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. Limit cycles and stiffness control with variable stiffness actuators

    NARCIS (Netherlands)

    Carloni, Raffaella; Marconi, L.

    2012-01-01

    Variable stiffness actuators realize highly dynamic systems, whose inherent mechanical compliance can be properly exploited to obtain a robust and energy-efficient behavior. The paper presents a control strategy for variable stiffness actuators with the primarily goal of tracking a limit cycle

  8. Senior citizens retrofits

    Energy Technology Data Exchange (ETDEWEB)

    1985-02-01

    The Seniors' Residential Retrofitting Project was Yukon's most ambitious CREDA, funded demonstration with a total cost of $460,000. The project undertook to demonstrate energy-efficient retrofitting techniques in 38 homes and two apartment complexes for senior citizens. At the same time, the project strove to train Yukon tradesmen in retrofitting techniques, thus creating a local industry and employment within this industry. To this end, two training courses were given for local tradesmen and contractors, the first of their kind in Canada. The training part of the project was given equal importance as the actual demonstration part. Three levels of retrofit work were done on the homes of senior citizens. Level one included caulking, weatherstripping, furnace servicing, and installation of water flow restrictors, water heater blankets and timers. The level two retrofit included the treatment in level one, plus upgrading windows and the insulation levels in walls and ceilings. A level three retrofit involved a total rewrap of the building shell with some of the features in levels one and two incorporated. The demonstration program included the following steps: initial contact with senior citizens; energy audit on each house; determination of level of retrofit work based on individual audit results; contract packages drawn up and put to tender; monitoring of fuel records and air-tightness tests both before and after retrofit; and tabulation of data and information transfer. 10 figs., 4 tabs.

  9. For Seniors, Eat with Caution

    Science.gov (United States)

    ... page please turn Javascript on. Healthy Holiday For Seniors, Eat with Caution Past Issues / Fall 2009 Table ... reduce risks of illness from bacteria in food, seniors (and others who face special risks of illness) ...

  10. Volunteering of seniors in community

    OpenAIRE

    Stropková, Andrea

    2017-01-01

    The diploma thesis deals with the theme of volunteering of seniors in the community. The work focuses on the specifics of volunteering of seniors, emphasizing the benefits of volunteering for participating seniors and how to identify them with other groups of people. Using a qualitative research work, it examines on a sample of eight respondents how these senior volunteers perceive the benefits of volunteering, how they relate to the geographical location in which they work, and what communit...

  11. Artificial muscles with adjustable stiffness

    International Nuclear Information System (INIS)

    Mutlu, Rahim; Alici, Gursel

    2010-01-01

    This paper reports on a stiffness enhancement methodology based on using a suitably designed contact surface with which cantilevered-type conducting polymer bending actuators are in contact during operation. The contact surface constrains the bending behaviour of the actuators. Depending on the topology of the contact surface, the resistance of the polymer actuators to deformation, i.e. stiffness, is varied. As opposed to their predecessors, these polymer actuators operate in air. Finite element analysis and modelling are used to quantify the effect of the contact surface on the effective stiffness of a trilayer cantilevered beam, which represents a one-end-free, the-other-end-fixed polypyrrole (PPy) conducting polymer actuator under a uniformly distributed load. After demonstrating the feasibility of the adjustable stiffness concept, experiments were conducted to determine the stiffness of bending-type conducting polymer actuators in contact with a range (20–40 mm in radius) of circular contact surfaces. The numerical and experimental results presented demonstrate that the stiffness of the actuators can be varied using a suitably profiled contact surface. The larger the radius of the contact surface is, the higher is the stiffness of the polymer actuators. The outcomes of this study suggest that, although the stiffness of the artificial muscles considered in this study is constant for a given geometric size, and electrical and chemical operation conditions, it can be changed in a nonlinear fashion to suit the stiffness requirement of a considered application. The stiffness enhancement methodology can be extended to other ionic-type conducting polymer actuators

  12. Sexualita seniorů

    OpenAIRE

    Steklíková, Eliška

    2014-01-01

    This diploma thesis explores the area of sexuality of older people, summarizes previously published theoretical knowledge in this area and is complemented by empirical research. It deals with aging and outlines the changes that may occur in humans during this process, especially in terms of development and transformation of sexuality. This thesis also pursues the perception of senior sexuality by his surroundings and the general public. This thesis also partially covers the issue of instituti...

  13. Arterial stiffness and cognitive impairment.

    Science.gov (United States)

    Li, Xiaoxuan; Lyu, Peiyuan; Ren, Yanyan; An, Jin; Dong, Yanhong

    2017-09-15

    Arterial stiffness is one of the earliest indicators of changes in vascular wall structure and function and may be assessed using various indicators, such as pulse-wave velocity (PWV), the cardio-ankle vascular index (CAVI), the ankle-brachial index (ABI), pulse pressure (PP), the augmentation index (AI), flow-mediated dilation (FMD), carotid intima media thickness (IMT) and arterial stiffness index-β. Arterial stiffness is generally considered an independent predictor of cardiovascular and cerebrovascular diseases. To date, a significant number of studies have focused on the relationship between arterial stiffness and cognitive impairment. To investigate the relationships between specific arterial stiffness parameters and cognitive impairment, elucidate the pathophysiological mechanisms underlying the relationship between arterial stiffness and cognitive impairment and determine how to interfere with arterial stiffness to prevent cognitive impairment, we searched PUBMED for studies regarding the relationship between arterial stiffness and cognitive impairment that were published from 2000 to 2017. We used the following key words in our search: "arterial stiffness and cognitive impairment" and "arterial stiffness and cognitive impairment mechanism". Studies involving human subjects older than 30years were included in the review, while irrelevant studies (i.e., studies involving subjects with comorbid kidney disease, diabetes and cardiac disease) were excluded from the review. We determined that arterial stiffness severity was positively correlated with cognitive impairment. Of the markers used to assess arterial stiffness, a higher PWV, CAVI, AI, IMT and index-β and a lower ABI and FMD were related to cognitive impairment. However, the relationship between PP and cognitive impairment remained controversial. The potential mechanisms linking arterial stiffness and cognitive impairment may be associated with arterial pulsatility, as greater arterial pulsatility

  14. Stiffness of desiccating insect wings

    International Nuclear Information System (INIS)

    Mengesha, T E; Vallance, R R; Mittal, R

    2011-01-01

    The stiffness of insect wings is typically determined through experimental measurements. Such experiments are performed on wings removed from insects. However, the wings are subject to desiccation which typically leads to an increase in their stiffness. Although this effect of desiccation is well known, a comprehensive study of the rate of change in stiffness of desiccating insect wings would be a significant aid in planning experiments as well as interpreting data from such experiments. This communication presents a comprehensive experimental analysis of the change in mass and stiffness of gradually desiccating forewings of Painted Lady butterflies (Vanessa cardui). Mass and stiffness of the forewings of five butterflies were simultaneously measured every 10 min over a 24 h period. The averaged results show that wing mass declined exponentially by 21.1% over this time period with a time constant of 9.8 h, while wing stiffness increased linearly by 46.2% at a rate of 23.4 μN mm -1 h -1 . For the forewings of a single butterfly, the experiment was performed over a period of 1 week, and the results show that wing mass declined exponentially by 52.2% with a time constant of 30.2 h until it reached a steady-state level of 2.00 mg, while wing stiffness increased exponentially by 90.7% until it reached a steady-state level of 1.70 mN mm -1 . (communication)

  15. Stiffness of desiccating insect wings

    Energy Technology Data Exchange (ETDEWEB)

    Mengesha, T E; Vallance, R R [Department of Mechanical Engineering, The George Washington University, 738 Phillips Hall, 801 22nd St NW, Washington, DC 20052 (United States); Mittal, R, E-mail: vallance@gwu.edu [Department of Mechanical Engineering, Johns Hopkins University, 126 Latrobe Hall, 3400 N Charles Street, Baltimore, MD 21218 (United States)

    2011-03-15

    The stiffness of insect wings is typically determined through experimental measurements. Such experiments are performed on wings removed from insects. However, the wings are subject to desiccation which typically leads to an increase in their stiffness. Although this effect of desiccation is well known, a comprehensive study of the rate of change in stiffness of desiccating insect wings would be a significant aid in planning experiments as well as interpreting data from such experiments. This communication presents a comprehensive experimental analysis of the change in mass and stiffness of gradually desiccating forewings of Painted Lady butterflies (Vanessa cardui). Mass and stiffness of the forewings of five butterflies were simultaneously measured every 10 min over a 24 h period. The averaged results show that wing mass declined exponentially by 21.1% over this time period with a time constant of 9.8 h, while wing stiffness increased linearly by 46.2% at a rate of 23.4 {mu}N mm{sup -1} h{sup -1}. For the forewings of a single butterfly, the experiment was performed over a period of 1 week, and the results show that wing mass declined exponentially by 52.2% with a time constant of 30.2 h until it reached a steady-state level of 2.00 mg, while wing stiffness increased exponentially by 90.7% until it reached a steady-state level of 1.70 mN mm{sup -1}. (communication)

  16. Psychomotor activities with seniors

    Directory of Open Access Journals (Sweden)

    Jitka Kopřivová

    2015-07-01

    Full Text Available BACKGROUND: Given that the population all over the world is aging, it is necessary to fi nd ways to help maintain or improve the quality of life of seniors. The main goal of this paper is to show how appropriate physical activity programs contribute to the improvement of the functionality and psychosocial wellbeing of seniors. We are particularly interested in the possibilities of preserving self-suffi ciency and self-service, independence and the ability to perform everyday activities. One of the most eff ective forms of physical activity is psychomotr activity.OBJECTIVE: The aim of our paper is to present basic information concerning the meaning and the application of the psychomotr activities in intervention movement programmes in order to improve seniors’ life quality.METHODS: We defi ne the term psychomotr activities according to Adamírová (1995 and Novotná (2010. In this paper we present some results of research that stress the positive eff ect of psychomotor exercises and games on the life satisfaction of the elderly (Stará 2011; Stará & Kopřivová, 2011.DESCRIPTION: According to the results of our research and practical experience gained from working with the elderly it is strongly recommended to include suitable psychomotor exercises and games focusing on the development of manual dexterity in training programs in order to improve the balance abilities and the psychosocial area. In terms of prevention, because of the growing number of neurological disorders at an old age it is appropriate to include psychomotor exercises that encourage the development of cognitive functions in the physical interventions.CONCLUSION: We were able to positively infl uence the emotional aspect from performing physical activities, to enhance self-esteem of the exercising subjects and to create new social relationships. Motion programs, which also included psychomotor exercises and games, had a positive eff ect on the physical assessment of the

  17. Memory training with senior citizens

    OpenAIRE

    CHOVANCOVÁ, Lenka

    2014-01-01

    This is a theoretical work. It deals with the topics of senior citizens and the aging process in an abbreviated conception, periodization of old age, and active life of seniors. It describes forms of social work with seniors in medical facilities, home environments and communities, and in old people's homes. Further, it describes memory: its definition, types of memory, memory loss, reasons why people forget, work with memory and advice on memory improvement from the medical point of view. Th...

  18. Measurement and Treatment of Passive Muscle Stiffness

    DEFF Research Database (Denmark)

    Kirk, Henrik

    , which aimed to investigate: 1) The development of a clinical method to evaluate and distinguish neural (reflex mediated stiffness) and non-neural (passive muscle stiffness) components of muscle stiffness in adults with CP by objective and reliable measurements. 2) The association between increased...... and reliability of the method, and argue for the use of the method in the clinical practice. The device is able to distinguish between passive muscle stiffness and reflex-mediated stiffness in subjects with CP. It shows good high intrarater and interrater reliability in evaluation of passive muscle stiffness...... to measure muscle stiffness, and distinguish between passive muscle stiffness and reflex-mediated stiffness. Furthermore, it is a reliable device to measure changes in passive ROM. Treatment of passive muscle stiffness should be directed towards intense training, comprising many repetitions with a functional...

  19. Seniority in projection operator formalism

    International Nuclear Information System (INIS)

    Ullah, N.

    1976-01-01

    It is shown that the concept of seniority can be introduced in projection operator formalism through the use of the operator Q, which has been defined by de-Shalit and Talmi. The usefulness of seniority concept in projection operator formalism is discussed. An example of four nucleons in j=3/2 configuration is given for illustrative purposes

  20. Senior Thesis Research at Princeton.

    Science.gov (United States)

    Prud'homme, Robert K.

    1981-01-01

    Reviews a senior undergraduate research program in chemical engineering at Princeton University. Includes strengths and requirements for a successful program. Senior thesis research provides creative problem solving experiences for students and is congruent with departmental research objectives. Selected student comments are included. (SK)

  1. Senior Loken Syndrome

    Directory of Open Access Journals (Sweden)

    F Najafi

    2011-02-01

    Full Text Available The etiology of ESRD under the age of 20 almost is the inherited kidney disease or congenital disorders of urinary tract. NPHP/ medullary cystic disease includes a group of tubulo- genetic kidney disorders. NPHP is the cause of 15-20% ESRD in children and adolescents. The extra renal manifestations include: oculomotor Apraxia(Cogan syndrome, mental retardation, retinitis pigmentosa, (Senior- Loken syndrome liver fibrosis and skeletal disorders. Recently, on the basis of genetics and type of the protein product of these mutations, NPHP is divided to 6 types. The presented case is a 17 year old boy with end stage renal disease that he has been managed with hemodialysis. As the patient has polyuria and disturbance in vision from childhood and on physical examination he had retinitis pigmentosa and horizontal nystagmus with a history of chronic kidney disease in his 12 years old sister, and familial marriage between his parents, we suggest NPHP4 for the patient.

  2. Senior Managers’ Network Tie Use

    DEFF Research Database (Denmark)

    Zarzecka, Olga; Villeseche, Florence

    While the importance or even necessity to build and maintain resourceful social networks appears as a forthright fact, there is still a lack of certainty as to who benefits from the resources that can be accessed through senior managers’ networks, and under what conditions. In this paper, we...... contribute to answering this puzzle with a sample constituted of senior managers from Denmark and their network ties, and investigate both economic and sociological conditions of senior managers’ tie use. Our results show that the greater the distance between aspiration level and actual firm performance......, the more likely it is that senior managers will use their network ties to access resources that benefit chiefly the individual rather than the organization. In addition, we demonstrate that this rapport is moderated by senior managers’ social identity as a member of the corporate elite, so that a strong...

  3. Association of Gastrocnemius Muscle Stiffness With Passive Ankle Joint Stiffness and Sex-Related Difference in the Joint Stiffness.

    Science.gov (United States)

    Chino, Kintaro; Takashi, Hideyuki

    2017-11-15

    Passive ankle joint stiffness is affected by all structures located within and over the joint, and is greater in men than in women. Localized muscle stiffness can be assessed by ultrasound shear wave elastography, and muscle architecture such as fascicle length and pennation angle can be measured by B-mode ultrasonography. Thus, we assessed localized muscle stiffness of the medial gastrocnemius (MG) with consideration of individual variability in the muscle architecture, and examined the association of the muscle stiffness with passive ankle joint stiffness and the sex-related difference in the joint stiffness. Localized muscle stiffness of the MG in 16 men and 17 women was assessed at 10° and 20° plantar flexion, neutral anatomical position, 10° and 20° dorsiflexion. Fascicle length and pennation angle of the MG were measured at these joint positions. Passive ankle joint stiffness was determined by the ankle joint angle-torque relationship. Localized MG muscle stiffness was not significantly correlated with passive ankle joint stiffness, and did not show significant sex-related difference, even when considering the muscle architecture. This finding suggest that muscle stiffness of the MG would not be a prominent factor to determine passive ankle joint stiffness and the sex-related difference in the joint stiffness.

  4. Analisis Kebutuhan Bandwidth Pada Pemanfaatan Web Streaming Justin.tv Sebagai Media E-Learning Dengan Menggunakan Wirecast Dan Desktop Presenter

    Directory of Open Access Journals (Sweden)

    Muhammad Ubaidilah

    2014-05-01

    Full Text Available Perkembangan teknologi informasi begitu cepat seperti sekarang telah banyak mengubah sudut pandang banyak orang, antara lain sudut pandang orang untuk mengubah dunia pendidikan menjadi lebih baik. Salah satu contohnya pembelajaran berbasis Information and Communication Technologies (ICT yaitu pembelajaran menggunakan video streaming. Dengan instalasi software open source Wirecast dan Desktop presenter digunakan untuk membuat video pembelajaran Streaming, disiarkan secara real time melalui media broadcast justin.tv (internet TV Channel, diharapkan dapat lebih mendukung konsep pembelajaran kapan dan dimana saja. Masalah terbesar dari teknologi ini adalah keterbatasan bandwidth. Bandwidth adalah parameter penting untuk melakukan streaming dalam jaringan. Sedangkan proses komunikasi menggunakan video digital ini menghabiskan resource yang cukup besar. Sehingga penggunaan wireshark di sini sangat diperlukan untuk menganalisis bandwidth pada paket yang diterima oleh client. Dari hasil pengukuran video dengan standar H.264 resolusi (720 x 540, dengan rata-rata 20 menit dalam pengambilan sampel, sebanyak 30 pengujian sampel streaming video menggunakan wireshark, diperoleh rata-rata throughput keseluruhan 0,343 Mbps, rata-rata throughput terendah 0,309 Mbps dan throughput tertinggi 0,372 Mbps. Dapat disimpulkan bahwa jika dihasilkan throughput yang lebih besar maka kualitas video streaming akan lebih baik, tetapi jika throughput dihasilkan semakin kecil maka kualitas video streaming akan menurun

  5. Returns to Tenure or Seniority?

    DEFF Research Database (Denmark)

    Buhai, Ioan Sebastian; Portela, Miguel; Teulings, Coen

      This study documents two empirical regularities, using data for Denmark and Portugal. First, workers who are hired last, are the first to leave the firm (Last In, First Out; LIFO). Second, workers' wages rise with seniority (= a Worker's tenure relative to the tenure of her colleagues). We seek...... at the moment of separation). The LIFO rule provides a stronger bargaining position for senior workers, leading to a return to seniority in wages. Efficiency in hiring requires the workers' .bargaining power to be in line with their share in the cost of specific investment. Then, the LIFO rule is a way...

  6. Properties and determination of the interface stiffness

    International Nuclear Information System (INIS)

    Du Danxu; Zhang Hao; Srolovitz, David J.

    2007-01-01

    The chemical potential of a curved interface contains a term that is proportional to the product of the interface curvature and the interface stiffness. In crystalline materials, the interface stiffness is a tensor. This paper examines several basic issues related to the properties of the interface stiffness, especially the determination of the interface stiffness in particular directions (i.e. the commonly used scalar form of the interface stiffness). Of the five parameters that describe an arbitrary grain boundary, only those describing the inclination are crucial for the scalar stiffness. We also examine the influence of crystal symmetry on the stiffness tensor for both free surfaces and grain boundaries. This results in substantial simplifications for cases in which interfaces possess mirror or rotational symmetries. An efficient method for determining the interface stiffness tensor using atomistic simulations is proposed

  7. Seafood: Nutritional Gold for Seniors

    Directory of Open Access Journals (Sweden)

    Alexandra McManus

    2010-12-01

    Full Text Available ObjectivesTo conduct a systematic review of published evidence around seafood, health and seniors.MethodData sources reviewing included: Proquest; PubMed; Science Direct; Taylor and Francis; Cochran Collaboration; Web of Knowledge and Web of Science. Key search terms included seniors, ageing, fish, seafood, protein, health and various lifestyle conditions Results A diet high in marine source Omega-3 poly unsaturated fatty acids affords particular benefits for seniors in a reduced risk of all cause mortality, with the strongest evidence around coronary heart disease and ischemic stroke. Other benefits include reduced inflammation associated with arthritis and delay to onset and slowed progression of dementia and Alzheimer’s disease. Conclusion There is increasing evidence to support the regular seafood consumption (particularly oily fish as being protective against a number of aged-related health conditions. Seniors should be encouraged to consume 3500mg- 4000mg of marine source Omega-3 PUFAs each week.

  8. Nordic Seniors on the Move

    DEFF Research Database (Denmark)

    ”I believe that all people need to move about. Actually, some have difficulties in doing so. They stay in their home neighbourhoods where they’ve grown up and feel safe. I can understand that, but my wife and I, we didn’t want that. We are more open to new ideas.” This anthology is about seniors...... on the move. In seven chapters, Nordic researchers from various disciplines, by means of ethnographic methods, attempt to comprehend the phenomenon of Nordic seniors who move to leisure areas in their own or in other countries. The number of people involved in this kind of migratory movement has grown...... above gives voice to one of these seniors, stressing the necessity of moving. The anthology contributes to the international body of literature about later life migration, specifically representing experiences made by Nordic seniors. As shown here, mobility and migration in later life have implications...

  9. Shoulder Stiffness : Current Concepts and Concerns

    NARCIS (Netherlands)

    Itoi, Eiji; Arce, Guillermo; Bain, Gregory I.; Diercks, Ronald L.; Guttmann, Dan; Imhoff, Andreas B.; Mazzocca, Augustus D.; Sugaya, Hiroyuki; Yoo, Yon-Sik

    Shoulder stiffness can be caused by various etiologies such as immobilization, trauma, or surgical interventions. The Upper Extremity Committee of ISAKOS defined the term "frozen shoulder" as idiopathic stiff shoulder, that is, without a known cause. Secondary stiff shoulder is a term that should be

  10. Seniorer & psykisk arbejdsmiljø

    OpenAIRE

    Bech, Anne

    2015-01-01

    This thesis aims to examine how senior employees experience that their psychological work environment affects their decision to stay on the labour market despite their possibility to retire. I have conducted interviews with 6 senior employees and 2 supervisors in the consulting group COWI. I have analysed the interviews by using a well-known work environment model, the Job-Demand-Control model presented by Karasek and the cognitive coping theory presented by Lazarus. The assumption in the Job...

  11. SENIOR STAFF ADVANCEMENT COMMITTEE (SSAC)

    CERN Document Server

    2000-01-01

    Composition and mandateThe Senior Staff Advancement Committee is composed of members nominated ad persona by the Director-General.The Committee examines proposals from Divisions concerning promotions to grade 13 in Career Path IX, changes of career path to Career Path IX and advancements to the exceptional grade in Career path VIII.The Director-General may consult the Committee on any matter related to senior staff careers.The Committee makes its recommendations to the Director-General.

  12. Dynamic stiffness of suction caissons

    DEFF Research Database (Denmark)

    Ibsen, Lars Bo; Liingaard, Morten; Andersen, Lars

    This report concerns the dynamic soil-structure interaction of steel suction caissons applied as foundations for offshore wind turbines. An emphasis is put on torsional vibrations and coupled sliding/rocking motion, and the influence of the foundation geometry and the properties of the surrounding...... soil is examined. The soil is simplified as a homogenous linear viscoelastic material and the dynamic stiffness of the suction caisson is expressed in terms of dimensionless frequency-dependent coefficients corresponding to the different degrees of freedom. The dynamic stiffness coefficients...... for the skirted foundation are evaluated by means of a three-dimensional coupled boundary element/finite element model. Comparisons with known analytical and numerical solutions indicate that the static and dynamic behaviour of the foundation are predicted accurately with the applied model. The analysis has been...

  13. [Metabolic syndrome and aortic stiffness].

    Science.gov (United States)

    Simková, A; Bulas, J; Murín, J; Kozlíková, K; Janiga, I

    2010-09-01

    The metabolic syndrome (MS) is a cluster of risk factors that move the patient into higher level of risk category of cardiovascular disease and the probability of type 2 diabetes mellitus manifestation. Definition of MS is s based on the presence of selected risk factors as: abdominal obesity (lager waist circumpherence), atherogenic dyslipidemia (low value of HDL-cholesterol and increased level of triglycerides), increased fasting blood glucose (or type 2 DM diagnosis), higher blood pressure or antihypertensive therapy. In 2009 there were created harmonizing criteria for MS definition; the condition for assignment of MS is the presence of any 3 criteria of 5 mentioned above. The underlying disorder of MS is an insulin resistance or prediabetes. The patients with MS more frequently have subclinical (preclinical) target organ disease (TOD) which is the early sings of atherosclerosis. Increased aortic stiffness is one of the preclinical diseases and is defined by pathologically increased carotidofemoral pulse wave velocity in aorta (PWV Ao). With the aim to assess the influence of MS on aortic stiffness we examined the group of women with arterial hypertension and MS and compare them with the group of women without MS. The aortic stiffness was examined by Arteriograph--Tensiomed, the equipment working on the oscillometric principle in detection of pulsations of brachial artery. This method determines the global aortic stiffness based on the analysis of the shape of pulse curve of brachial artery. From the cohort of 49 pts 31 had MS, the subgroups did not differ in age or blood pressure level. The mean number of risk factors per person in MS was 3.7 comparing with 1.7 in those without MS. In the MS group there was more frequently abdominal obesity present (87% vs 44%), increased fasting blood glucose (81% vs 22%) and low HDL-cholesterol level. The pulse wave velocity in aorta, PWV Ao, was significantly higher in patients with MS (mean value 10,19 m/s vs 8,96 m

  14. Coupling between the Output Force and Stiffness in Different Variable Stiffness Actuators

    Directory of Open Access Journals (Sweden)

    Amir Jafari

    2014-08-01

    Full Text Available The fundamental objective in developing variable stiffness actuators is to enable the actuator to deliberately tune its stiffness. This is done through controlling the energy flow extracted from internal power units, i.e., the motors of a variable stiffness actuator (VSA. However, the stiffness may also be unintentionally affected by the external environment, over which, there is no control. This paper analysis the correlation between the external loads, applied to different variable stiffness actuators, and their resultant output stiffness. Different types of variable stiffness actuators have been studied considering springs with different types of nonlinearity. The results provide some insights into how to design the actuator mechanism and nonlinearity of the springs in order to increase the decoupling between the load and stiffness in these actuators. This would significantly widen the application range of a variable stiffness actuator.

  15. Seniority bosons from similarity transformations

    International Nuclear Information System (INIS)

    Geyer, H.B.

    1986-01-01

    The requirement of associating in the boson space seniority with twice the number of non-s bosons defines a similarity transformation which re-expresses the Dyson pair boson images in terms of seniority bosons. In particular the fermion S-pair creation operator is mapped onto an operator which, unlike the pair boson image, does not change the number of non-s bosons. The original results of Otsuka, Arima and Iachello are recovered by this procedure while at the same time they are generalized to include g-bosons or even bosons with J>4 as well as any higher order boson terms. Furthermore the seniority boson images are valid for an arbitrary number of d- or g-bosons - a result which is not readily obtainable within the framework of the usual Marumori- or OAI-method

  16. Examining spectator motivations in Major League Baseball: A Comparison between senior and non-senior consumers

    Directory of Open Access Journals (Sweden)

    Junghwan Park

    2016-10-01

    Full Text Available The purpose of this study was to identify the differences in the motives between senior and non-senior sport consumers who attend sport events and to compare the effect of spectator motivation on sport consumption behaviors between senior and non-senior consumers. Multiple regression analyses were conducted to examine the relationship between motivation factors and sport consumption variables for senior and non- senior spectator groups. The results showed that both senior and non-senior spectators were commonly motivated by the following specific motives of escape, social interaction, physical skill and drama for attending a MLB game.

  17. Rekruttering og fastholdelse af seniorer

    DEFF Research Database (Denmark)

    Luccat, Dorte

    Denne undersøgelse har til formål at afdække holdninger, praksis, barrierer og muligheder i forhold til rekruttering og fastholdelse af seniorer. Undersøgelsen er baseret på 19 kvalitative interviews med henholdsvis tillidsrepræsentanter og personaleledere på 13 forskellige arbejdspladser. De...... udvalgte arbejdspladser repræsenterer såvel den offentlige som den private sektor samt større (mindst 50 ansatte) og mindre (under 50 ansatte) arbejdspladser. Vi har endvidere besøgt virksomheder, der henholdsvis har og ikke har seniorer ansat, for at indsamle information om holdninger og praksis fra flere...

  18. Senior Service College: A Pillar of Civilian Senior Leader Development

    Science.gov (United States)

    2011-02-16

    other burgeoning global issues mandate the existence of capable senior civilian leaders who can effectively participate within the whole-of-government...experience that provides the opportunity to discuss and debate current global issues with the members of the world’s finest military. Civilians not only

  19. Senioritis: Some Paths to Sanity

    Science.gov (United States)

    O'Neal, Roland

    1978-01-01

    A social studies course for high school seniors combines a problems of democracy content with options emphasizing long-term accountability. Each student has a faculty adviser who encourages the student to pursue a specialized social studies topic. (Author/DB)

  20. Online resources for senior citizens

    CERN Document Server

    Sharpe, Charles C

    2006-01-01

    This book facilitates and expands Internet access and usage by seniors, assists them in finding the information they want and need, and contributes to their knowledge of the aging process and the challenges it presents by providing a list of online resources of particular interest to them.

  1. Loneliness in senior housing communities.

    Science.gov (United States)

    Taylor, Harry Owen; Wang, Yi; Morrow-Howell, Nancy

    2018-05-23

    There are many studies on loneliness among community-dwelling older adults; however, there is limited research examining the extent and correlates of loneliness among older adults who reside in senior housing communities. This study examines the extent and correlates of loneliness in three public senior housing communities in the St. Louis area. Data for this project was collected with survey questionnaires with a total sample size of 148 respondents. Loneliness was measured using the Hughes 3-item loneliness scale. Additionally, the questionnaire contained measures on socio-demographics, health/mental health, social engagement, and social support. Missing data for the hierarchical multivariate regression models were imputed using multiple imputation methods. Results showed approximately 30.8% of the sample was not lonely, 42.7% was moderately lonely, and 26.6% was severely lonely. In the multivariate analyses, loneliness was primarily associated with depressive symptoms. Contrary to popular opinion, our study found the prevalence of loneliness was high in senior housing communities. Nevertheless, senior housing communities could be ideal locations for reducing loneliness among older adults. Interventions should focus on concomitantly addressing both an individual's loneliness and mental health.

  2. Special Concerns for Seniors: Clostridium difficile

    Science.gov (United States)

    ... and Drugs" Home | Contact Us Special Concerns for Seniors Clostridium difficile - an introduction Clostridium difficile (“C. diff”) ... see APUA’s contribution to CDC’s Vital Signs campaign . Seniors are especially at risk People over the age ...

  3. A Multimodal Robot Game for Seniors

    DEFF Research Database (Denmark)

    Hansen, Søren Tranberg; Krogsager, Anders; Fredslund, Jakob

    2017-01-01

    This paper describes the initial findings of a multimodal game which has been implemented on a humanoid robot platform and tested with seniors suffering from dementia. Physical and cognitive activities can improve the overall wellbeing of seniors, but it is often difficult to motivate seniors...... feedback and includes animated gestures and sounds. The game has been tested in a nursing home with four seniors suffering from moderate to severe dementia....

  4. A variable stiffness joint with electrospun P(VDF-TrFE-CTFE) variable stiffness springs

    NARCIS (Netherlands)

    Carloni, Raffaella; Lapp, Valerie I.; Cremonese, Andrea; Belcari, Juri; Zucchelli, Andrea

    This letter presents a novel rotational variable stiffness joint that relies on one motor and a set of variable stiffness springs. The variable stiffness springs are leaf springs with a layered design, i.e., an electro-active layer of electrospun aligned nanofibers of poly(vinylidene

  5. Robotics Focused Capstone Senior Design Course

    Science.gov (United States)

    Rios-Gutierrez, Fernando; Alba-Flores, Rocio

    2017-01-01

    This work describes the educational experiences gained teaching the Senior Design I & II courses, a senior level, two-semester sequence in the Electrical Engineering (EE) program at Georgia Southern University (GSU). In particular, the authors present their experiences in using robotics as the main area to develop the capstone senior design,…

  6. Load to Failure and Stiffness

    Science.gov (United States)

    Esquivel, Amanda O.; Duncan, Douglas D.; Dobrasevic, Nikola; Marsh, Stephanie M.; Lemos, Stephen E.

    2015-01-01

    Background: Rotator cuff tendinopathy is a frequent cause of shoulder pain that can lead to decreased strength and range of motion. Failures after using the single-row technique of rotator cuff repair have led to the development of the double-row technique, which is said to allow for more anatomical restoration of the footprint. Purpose: To compare 5 different types of suture patterns while maintaining equality in number of anchors. The hypothesis was that the Mason-Allen–crossed cruciform transosseous-equivalent technique is superior to other suture configurations while maintaining equality in suture limbs and anchors. Study Design: Controlled laboratory study. Methods: A total of 25 fresh-frozen cadaveric shoulders were randomized into 5 suture configuration groups: single-row repair with simple stitch technique; single-row repair with modified Mason-Allen technique; double-row Mason-Allen technique; double-row cross-bridge technique; and double-row suture bridge technique. Load and displacement were recorded at 100 Hz until failure. Stiffness and bone mineral density were also measured. Results: There was no significant difference in peak load at failure, stiffness, maximum displacement at failure, or mean bone mineral density among the 5 suture configuration groups (P row rotator cuff repair to be superior to the single-row repair; however, clinical research does not necessarily support this. This study found no difference when comparing 5 different repair methods, supporting research that suggests the number of sutures and not the pattern can affect biomechanical properties. PMID:26665053

  7. Stiffness and damping in mechanical design

    National Research Council Canada - National Science Library

    Rivin, Eugene I

    1999-01-01

    ... important conceptual issues are stiffness of mechanical structures and their components and damping in mechanical systems sensitive to and/or generating vibrations. Stiffness and strength are the most important criteria for many mechanical designs. However, although there are hundreds of books on various aspects of strength, and strength issues ar...

  8. Social work practice with LGBT seniors.

    Science.gov (United States)

    Gratwick, Steve; Jihanian, Lila J; Holloway, Ian W; Sanchez, Marisol; Sullivan, Kathleen

    2014-01-01

    The Los Angeles Gay & Lesbian Center began providing services to LGBT seniors in 2008. Since then, the Center's seniors program has grown to over 3,300 clients. It provides a variety of enrichment and support services with the overarching goal of empowering seniors to successfully age in place. This article outlines the service delivery program of the Center's Seniors Services Department and describes its successes and challenges in meeting the needs of diverse LGBT seniors. It offers future directions for social work practice, policy, and research with LGBT older adults.

  9. Innovative Approach to Senior Practicum Students.

    Science.gov (United States)

    Golightly, Melissa; Kennett, Natalie; Stout, Jacqueline A

    2017-12-01

    Traditional senior practicum experiences (SPEs) are microsystem based-they allow senior nursing students the opportunity to build professional nursing competencies as they transition into practice. As health care transformation continues unabated, there is a need to work toward closing the gap between nursing academia and nursing practice. A cardiovascular service line created an innovative SPE to better prepare senior nursing students for working as professional nurses in a service line model. The Senior Practicum Immersion Experience (SPIE) proved to be beneficial to senior practicum students and offered firsthand experience of the role professional nurses play in a service line model. This model increased the number of senior practicum students accepted into the cardiac service line by 50%. The SPIE creates an innovative solution to increasing the number of senior practicum students while allowing students the ability to learn and practice in a service line model. [J Nurs Educ. 2017;56(12):745-747.]. Copyright 2017, SLACK Incorporated.

  10. Topology optimization under stochastic stiffness

    Science.gov (United States)

    Asadpoure, Alireza

    Topology optimization is a systematic computational tool for optimizing the layout of materials within a domain for engineering design problems. It allows variation of structural boundaries and connectivities. This freedom in the design space often enables discovery of new, high performance designs. However, solutions obtained by performing the optimization in a deterministic setting may be impractical or suboptimal when considering real-world engineering conditions with inherent variabilities including (for example) variabilities in fabrication processes and operating conditions. The aim of this work is to provide a computational methodology for topology optimization in the presence of uncertainties associated with structural stiffness, such as uncertain material properties and/or structural geometry. Existing methods for topology optimization under deterministic conditions are first reviewed. Modifications are then proposed to improve the numerical performance of the so-called Heaviside Projection Method (HPM) in continuum domains. Next, two approaches, perturbation and Polynomial Chaos Expansion (PCE), are proposed to account for uncertainties in the optimization procedure. These approaches are intrusive, allowing tight and efficient coupling of the uncertainty quantification with the optimization sensitivity analysis. The work herein develops a robust topology optimization framework aimed at reducing the sensitivity of optimized solutions to uncertainties. The perturbation-based approach combines deterministic topology optimization with a perturbation method for the quantification of uncertainties. The use of perturbation transforms the problem of topology optimization under uncertainty to an augmented deterministic topology optimization problem. The PCE approach combines the spectral stochastic approach for the representation and propagation of uncertainties with an existing deterministic topology optimization technique. The resulting compact representations

  11. Observer-Based Human Knee Stiffness Estimation.

    Science.gov (United States)

    Misgeld, Berno J E; Luken, Markus; Riener, Robert; Leonhardt, Steffen

    2017-05-01

    We consider the problem of stiffness estimation for the human knee joint during motion in the sagittal plane. The new stiffness estimator uses a nonlinear reduced-order biomechanical model and a body sensor network (BSN). The developed model is based on a two-dimensional knee kinematics approach to calculate the angle-dependent lever arms and the torques of the muscle-tendon-complex. To minimize errors in the knee stiffness estimation procedure that result from model uncertainties, a nonlinear observer is developed. The observer uses the electromyogram (EMG) of involved muscles as input signals and the segmental orientation as the output signal to correct the observer-internal states. Because of dominating model nonlinearities and nonsmoothness of the corresponding nonlinear functions, an unscented Kalman filter is designed to compute and update the observer feedback (Kalman) gain matrix. The observer-based stiffness estimation algorithm is subsequently evaluated in simulations and in a test bench, specifically designed to provide robotic movement support for the human knee joint. In silico and experimental validation underline the good performance of the knee stiffness estimation even in the cases of a knee stiffening due to antagonistic coactivation. We have shown the principle function of an observer-based approach to knee stiffness estimation that employs EMG signals and segmental orientation provided by our own IPANEMA BSN. The presented approach makes realtime, model-based estimation of knee stiffness with minimal instrumentation possible.

  12. Big bang nucleosynthesis with a stiff fluid

    International Nuclear Information System (INIS)

    Dutta, Sourish; Scherrer, Robert J.

    2010-01-01

    Models that lead to a cosmological stiff fluid component, with a density ρ S that scales as a -6 , where a is the scale factor, have been proposed recently in a variety of contexts. We calculate numerically the effect of such a stiff fluid on the primordial element abundances. Because the stiff fluid energy density decreases with the scale factor more rapidly than radiation, it produces a relatively larger change in the primordial helium-4 abundance than in the other element abundances, relative to the changes produced by an additional radiation component. We show that the helium-4 abundance varies linearly with the density of the stiff fluid at a fixed fiducial temperature. Taking ρ S10 and ρ R10 to be the stiff fluid energy density and the standard density in relativistic particles, respectively, at T=10 MeV, we find that the change in the primordial helium abundance is well-fit by ΔY p =0.00024(ρ S10 /ρ R10 ). The changes in the helium-4 abundance produced by additional radiation or by a stiff fluid are identical when these two components have equal density at a 'pivot temperature', T * , where we find T * =0.55 MeV. Current estimates of the primordial 4 He abundance give the constraint on a stiff fluid energy density of ρ S10 /ρ R10 <30.

  13. Dynamic stiffness of suction caissons - vertical vibrations

    Energy Technology Data Exchange (ETDEWEB)

    Ibsen, Lars Bo; Liingaard, M.; Andersen, Lars

    2006-12-15

    The dynamic response of offshore wind turbines are affected by the properties of the foundation and the subsoil. The purpose of this report is to evaluate the dynamic soil-structure interaction of suction caissons for offshore wind turbines. The investigation is limited to a determination of the vertical dynamic stiffness of suction caissons. The soil surrounding the foundation is homogenous with linear viscoelastic properties. The dynamic stiffness of the suction caisson is expressed by dimensionless frequency-dependent dynamic stiffness coefficients corresponding to the vertical degree of freedom. The dynamic stiffness coefficients for the foundations are evaluated by means of a dynamic three-dimensional coupled Boundary Element/Finite Element model. Comparisons are made with known analytical and numerical solutions in order to evaluate the static and dynamic behaviour of the Boundary Element/Finite Element model. The vertical frequency dependent stiffness has been determined for different combinations of the skirt length, Poisson's ratio and the ratio between soil stiffness and skirt stiffness. Finally the dynamic behaviour at high frequencies is investigated. (au)

  14. Observed variations of monopile foundation stiffness

    DEFF Research Database (Denmark)

    Kallehave, Dan; Thilsted, C.L.; Diaz, Alberto Troya

    2015-01-01

    full-scale measurements obtained from one offshore wind turbine structure located within Horns Reef II offshore wind farm. Data are presented for a 2.5 years period and covers normal operating conditions and one larger storm event. A reduction of the pile-soil stiffness was observed during the storm...... events, followed by a complete regain to a pre-storm level when the storm subsided. In additional, no long term variations of the pile-soil stiffness was observed. The wind turbine is located in dense to very dense sand deposits.......The soil-structure stiffness of monopile foundations for offshore wind turbines has a high impact on the fatigue loading during normal operating conditions. Thus, a robust design must consider the evolution of pile-soil stiffness over the lifetime of the wind farm. This paper present and discuss...

  15. Cultura da celebridade, fãs e a nova mídia: um estudo sobre a promoção da imagem e trabalho de Justin Bieber

    OpenAIRE

    Camyla da Silva Oliveira; Renata Prado Alves Silva

    2016-01-01

    Este artigo se propõe a analisar as dinâmicas de comunicação entre Justin Bieber e seus seguidores na web, buscando compreender as formas de promoção da imagem e trabalhos do artista nas novas mídias. Nos métodos de pesquisa se destacam a netnografia das redes de fãs e análise de conteúdo para as mensagens dos canais de comunicação oficiais, além das trocas de informação entre membros do fandom. Os resultados apontam para as novas mídias como plataforma dinâmica para divulgação de informações...

  16. Damper modules with adapted stiffness ratio

    Energy Technology Data Exchange (ETDEWEB)

    Sonnenburg, R.; Stretz, A. [ZF Sachs AG, Entwicklungszentrum, Schweinfurt (Germany)

    2011-07-15

    A mechanism for the excitation of piston rod vibrations in automotive damper modules is discussed by a simple model. An improved nonlinear model based on elasticity effects leads to good simulation results. It is shown theoretically and experimentally that the adaptation of the stiffness of the piston rod bushing to the ''stiffness'' of the damper force characteristic can eliminate the piston rod oscillations completely. (orig.)

  17. OroSTIFF: Face-referenced measurement of perioral stiffness in health and disease.

    Science.gov (United States)

    Chu, Shin-Ying; Barlow, Steven M; Kieweg, Douglas; Lee, Jaehoon

    2010-05-28

    A new device and automated measurement technology known as OroSTIFF is described to characterize non-participatory perioral stiffness in healthy adults for eventual application to patients with orofacial movement disorders associated with neuromotor disease, traumatic injury, or congenital clefts of the upper lip. Previous studies of perioral biomechanics required head stabilization for extended periods of time during measurement, which precluded sampling patients with involuntary body/head movements (dyskinesias), or pediatric subjects. The OroSTIFF device is face-referenced and avoids the complications associated with head-restraint. Supporting data of non-participatory perioral tissue stiffness using OroSTIFF are included from 10 male and 10 female healthy subjects. The OroSTIFF device incorporates a pneumatic glass air cylinder actuator instrumented for pressure, and an integrated subminiature displacement sensor to encode lip aperture. Perioral electromyograms were simultaneously sampled to confirm passive muscle state for the superior and inferior divisions of the orbicularis oris muscles. Perioral stiffness, derived as a quotient from resultant force (DeltaF) and interangle span (DeltaX), was modeled with multilevel regression techniques. Real-time calculation of the perioral stiffness function demonstrated a significant quadratic relation between imposed interangle stretch and resultant force. This stiffness growth function also differed significantly between males and females. This study demonstrates the OroSTIFF 'proof-of-concept' for cost-effective non-invasive stimulus generation and derivation of perioral stiffness in a group of healthy unrestrained adults, and a case study to illustrate the dose-dependent effects of Levodopa on perioral stiffness in an individual with advanced Parkinson's disease who exhibited marked dyskinesia and rigidity. Copyright 2010 Elsevier Ltd. All rights reserved.

  18. Partial Conservation of Seniority and Nuclear Isomerism

    International Nuclear Information System (INIS)

    Van Isacker, P.; Heinze, S.

    2008-01-01

    We point out the possibility of the partial conservation of the seniority quantum number when most eigenstates are mixed in seniority but some remain pure. This situation occurs in nuclei for the g 9/2 and h 9/2 shells where it is at the origin of the existence of seniority isomers in the ruthenium and palladium isotopes. It also occurs for f bosons

  19. Socio-economic Aspects of Senior Nutrition.

    OpenAIRE

    ONDRÁČKOVÁ, Miroslava

    2017-01-01

    The focus of the presented diploma thesis is to evaluate the knowledge of seniors in the field of healthy nutrition. It is furthermore important to find out, whether the seniors have enough relevant information about rational nutrition and which sources they would like to use to gather information about healthy nutrition. Socio-economic aspects, which lead to senior nutrition, are also monitored. A quantitative research strategy and an in-depth interview were used to fulfil the aim of the the...

  20. Developing Senior Leaders for the Reserve Components

    Science.gov (United States)

    2017-01-01

    expectation other than rudimentary dialogues on career paths. Some senior leaders are superb mentors , but this appears to be a result of the personality... mentoring discussions, as well as resources and senior -level attention to these expectations, could complement individual development plans and structured...including senior leaders. This extends to the reserve components (RC) and their “critical bridge to the civilian population, infusing the Joint

  1. Stiffness of Railway Soil-Steel Structures

    Directory of Open Access Journals (Sweden)

    Machelski Czesław

    2015-12-01

    Full Text Available The considerable influence of the soil backfill properties and that of the method of compacting it on the stiffness of soil-steel structures is characteristic of the latter. The above factors (exhibiting randomness become apparent in shell deformation measurements conducted during construction and proof test loading. A definition of soil-shell structure stiffness, calculated on the basis of shell deflection under the service load, is proposed in the paper. It is demonstrated that the stiffness is the inverse of the deflection influence function used in structural mechanics. The moving load methodology is shown to be useful for testing, since it makes it possible to map the shell deflection influence line also in the case of group loads (concentrated forces, as in bridges. The analyzed cases show that the shell’s span, geometry (static scheme and the height of earth fill influence the stiffness of the structure. The soil-steel structure’s characteristic parameter in the form of stiffness k is more suitable for assessing the quality of construction works than the proposed in code geometric index ω applied to beam structures. As shown in the given examples, parameter k is more effective than stiffness parameter λ used to estimate the deformation of soil-steel structures under construction. Although the examples concern railway structures, the methodology proposed in the paper is suitable also for road bridges.

  2. Stiffness of Railway Soil-Steel Structures

    Science.gov (United States)

    Machelski, Czesław

    2015-12-01

    The considerable influence of the soil backfill properties and that of the method of compacting it on the stiffness of soil-steel structures is characteristic of the latter. The above factors (exhibiting randomness) become apparent in shell deformation measurements conducted during construction and proof test loading. A definition of soil-shell structure stiffness, calculated on the basis of shell deflection under the service load, is proposed in the paper. It is demonstrated that the stiffness is the inverse of the deflection influence function used in structural mechanics. The moving load methodology is shown to be useful for testing, since it makes it possible to map the shell deflection influence line also in the case of group loads (concentrated forces), as in bridges. The analyzed cases show that the shell's span, geometry (static scheme) and the height of earth fill influence the stiffness of the structure. The soil-steel structure's characteristic parameter in the form of stiffness k is more suitable for assessing the quality of construction works than the proposed in code geometric index ω applied to beam structures. As shown in the given examples, parameter k is more effective than stiffness parameter λ used to estimate the deformation of soil-steel structures under construction. Although the examples concern railway structures, the methodology proposed in the paper is suitable also for road bridges.

  3. SUPPORTING SENIOR CITIZENS TO LEARN IT SKILLS

    Directory of Open Access Journals (Sweden)

    Shigeki Yokoi

    2009-12-01

    Full Text Available Digital divide owing to age has become a major concern around the world, even in developed country, Japan. To combat the digital divide, a project named “e-namokun” aiming to help senior citizens use the Internet was started in Nagoya, Japan, which was a national first joint project run through government, universities, and NPO cooperation. In the project, nearly 2000 senior citizens have taken course of the software we developed. In relation with this project, we have been developing useful tools to support senior IT beginners. In the paper, we introduce the outline of the project and explain developed tools for senior citizens.

  4. Involvement. Senior citizens' recreational activities.

    Science.gov (United States)

    Gregersen, U B

    1992-06-01

    During the last 18 years, senior citizens in Viborg, Denmark, have participated in study circles based on the theory of impression pedagogy and socially relevant activities. They arrange excursions at home and abroad and make films about the trips. They teach schoolchildren, students at folk high schools, and nurses, as well as occupational therapists and physiotherapists. They publish poems and books, write role plays, stage musicals, sing in choirs, and function as tour guides in town. They set up educational color slide programmes on preventing bone fractures, dealing with the problem of reduced hearing, and the importance of healthy food and exercise. They travel abroad and talk about Denmark and the conditions for senior citizens in our country. With the support of the Danish Ministry for Social Affairs, they produce videos about their activities as a source of inspiration to others. The use of drugs by the participants in the study circles has declined, while the level of activities has increased, and none of the participants has ever had to enter residential care.

  5. 77 FR 60450 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2012-10-03

    ... DEPARTMENT OF HOMELAND SECURITY Office of the Secretary Senior Executive Service Performance... announces the appointment of the members of the Senior Executive Service Performance Review Boards for the... appropriate personnel actions for incumbents of Senior Executive Service, Senior Level and Senior Professional...

  6. 78 FR 44577 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2013-07-24

    ... DEPARTMENT OF HOMELAND SECURITY Office of the Secretary Senior Executive Service Performance... notice announces the appointment of the members of the Senior Executive Service Performance Review Boards... other appropriate personnel actions for incumbents of Senior Executive Service, Senior Level and Senior...

  7. Single motor–variable stiffness actuator using bistable switching mechanisms for independent motion and stiffness control

    NARCIS (Netherlands)

    Groothuis, Stefan; Carloni, Raffaella; Stramigioli, Stefano

    This paper presents a proof of concept of a variable stiffness actuator (VSA) that uses only one (high power) input motor. In general, VSAs use two (high power) motors to be able to control both the output position and the output stiffness, which possibly results in a heavy, and bulky system. In

  8. Double charge exchange and generalized seniority

    International Nuclear Information System (INIS)

    Ginocchio, J.N.

    1993-01-01

    The double charge exchange transition matrix elements from an even-even target to the double isobaric analog state and the ground state are derived in the generalized seniority model as a function of the number of valence nucleons. Crucial differences with the seniority model are found and their consequences are discussed. (orig.)

  9. Senior Law Faculty Attitudes toward Retirement.

    Science.gov (United States)

    Day, David S.; And Others

    1991-01-01

    This article examines the retirement plans and personal characteristics of 273 senior law school faculty, focusing on health status, income, job satisfaction, and preferred age of retirement. The study suggests that early retirement incentives and a "senior faculty" alternative to full retirement are positive institutional options. (DB)

  10. 76 FR 39361 - AmeriCorps State/National, Senior Companions, Foster Grandparents, and Retired and Senior...

    Science.gov (United States)

    2011-07-06

    ... AmeriCorps State/National, Senior Companions, Foster Grandparents, and Retired and Senior Volunteer...) on Senior Companions, Foster Grandparents, Retired Senior Volunteer Program grant-funded staff, Learn... X ....... X X ....... Senior Companions Yes X ....... ....... X X ....... X X ....... X X X No...

  11. Development of a stiffness-angle law for simplifying the measurement of human hair stiffness.

    Science.gov (United States)

    Jung, I K; Park, S C; Lee, Y R; Bin, S A; Hong, Y D; Eun, D; Lee, J H; Roh, Y S; Kim, B M

    2018-04-01

    This research examines the benefits of caffeine absorption on hair stiffness. To test hair stiffness, we have developed an evaluation method that is not only accurate, but also inexpensive. Our evaluation method for measuring hair stiffness culminated in a model, called the Stiffness-Angle Law, which describes the elastic properties of hair and can be widely applied to the development of hair care products. Small molecules (≤500 g mol -1 ) such as caffeine can be absorbed into hair. A common shampoo containing 4% caffeine was formulated and applied to hair 10 times, after which the hair stiffness was measured. The caffeine absorption of the treated hair was observed using Fourier-transform infrared spectroscopy (FTIR) with a focal plane array (FPA) detector. Our evaluation method for measuring hair stiffness consists of a regular camera and a support for single strands of hair. After attaching the hair to the support, the bending angle of the hair was observed with a camera and measured. Then, the hair strand was weighed. The stiffness of the hair was calculated based on our proposed Stiffness-Angle Law using three variables: angle, weight of hair and the distance the hair was pulled across the support. The caffeine absorption was confirmed by FTIR analysis. The concentration of amide bond in the hair certainly increased due to caffeine absorption. After caffeine was absorbed into the hair, the bending angle and weight of the hair changed. Applying these measured changes to the Stiffness-Angle Law, it was confirmed that the hair stiffness increased by 13.2% due to caffeine absorption. The theoretical results using the Stiffness-Angle Law agree with the visual examinations of hair exposed to caffeine and also the known results of hair stiffness from a previous report. Our evaluation method combined with our proposed Stiffness-Angle Law effectively provides an accurate and inexpensive evaluation technique for measuring bending stiffness of human hair. © 2018

  12. VARIABLE STIFFNESS HAND PROSTHESIS: A SYSTEMATIC REVIEW

    Directory of Open Access Journals (Sweden)

    S. Cecilia Tapia-Siles

    2017-06-01

    Full Text Available Prosthetics is an important field in engineering due to the large number of amputees worldwide and the associated problems such as limited functionality of the state of the art. An important functionality of the human hand is its capability of adjusting the stiffness of the joints depending on the currently performed task. For the development of new technology it is important to understand the limitations of existing resources. As part of our efforts to develop a variable stiffness grasper for developing countries a systematic review was performed covering technology of body powered and myoelectric hand prosthesis. Focus of the review is readiness of prosthetic hands regarding their capability of controlling the stiffness of the end effector. Publications sourced through three different digital libraries were systematically reviewed on the basis of the PRISMA standard. We present a search strategy as well as the PRISMA assessment of the resulting records which covered 321 publications. The records were assessed and the results are presented for the ability of devices to control their joint stiffness. The review indicates that body powered prosthesis are preferred to myoelectric hands due to the reduced cost, the simplicity of use and because of their inherent ability to provide feedback to the user. Stiffness control was identified but has not been fully covered in the current state of the art. In addition we summarise the identified requirements on prosthetic hands as well as related information which can support the development of new prosthetics.

  13. A Novel Variable Stiffness Mechanism Capable of an Infinite Stiffness Range and Unlimited Decoupled Output Motion

    Directory of Open Access Journals (Sweden)

    Stefan Groothuis

    2014-06-01

    Full Text Available In this paper, a novel variable stiffness mechanism is presented, which is capable of achieving an output stiffness with infinite range and an unlimited output motion, i.e., the mechanism output is completely decoupled from the rotor motion, in the zero stiffness configuration. The mechanism makes use of leaf springs, which are engaged at different positions by means of two movable supports, to realize the variable output stiffness. The Euler–Bernoulli leaf spring model is derived and validated through experimental data. By shaping the leaf springs, it is shown that the stiffness characteristic of the mechanism can be changed to fulfill different application requirements. Alternative designs can achieve the same behavior with only one leaf spring and one movable support pin.

  14. 76 FR 69770 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2011-11-09

    ... OFFICE OF PERSONNEL MANAGEMENT Senior Executive Service Performance Review Board AGENCY: Office of... of a senior executive's performance by the supervisor, and considers recommendations to the appointing authority regarding the performance of the senior executive. Office of Personnel Management. John...

  15. 78 FR 28243 - Senior Executive Service; Performance Review Board; Members

    Science.gov (United States)

    2013-05-14

    ... NATIONAL CAPITAL PLANNING COMMISSION Senior Executive Service; Performance Review Board; Members AGENCY: National Capital Planning Commission. ACTION: Notice of Members of Senior Executive Service... Senior Executive Service. The PRB established for the National Capital Planning Commission also makes...

  16. 76 FR 29013 - Senior Executive Service; Performance Review Board; Members

    Science.gov (United States)

    2011-05-19

    ... NATIONAL CAPITAL PLANNING COMMISSION Senior Executive Service; Performance Review Board; Members AGENCY: National Capital Planning Commission. ACTION: Notice of Members of Senior Executive Service... Senior Executive Service. The PRB established for the National Capital Planning Commission also makes...

  17. 78 FR 41191 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2013-07-09

    ... DEPARTMENT OF TRANSPORTATION Surface Transportation Board Senior Executive Service Performance... Transportation Board (STB) publishes the names of the Persons selected to serve on its Senior Executive Service... performance appraisal system making senior executives accountable for organizational and individual goal...

  18. 77 FR 54570 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2012-09-05

    ... DEFENSE NUCLEAR FACILITIES SAFETY BOARD Senior Executive Service Performance Review Board AGENCY... the Defense Nuclear Facilities Safety Board (DNFSB) Senior Executive Service (SES) Performance Review.... The PRB shall review and evaluate the initial summary rating of the senior executive's performance...

  19. 75 FR 62501 - Senior Executive Service Performance Review Board: Update

    Science.gov (United States)

    2010-10-12

    ... AGENCY FOR INTERNATIONAL DEVELOPMENT Senior Executive Service Performance Review Board: Update... Development, Office of Inspector General's Senior Executive Service Performance Review Board. DATES: September... reference-- USAID OIG Senior Executive Service (SES) Performance Review Board). SUPPLEMENTARY INFORMATION: 5...

  20. 78 FR 55244 - Senior Executive Service Performance Review Board; Membership

    Science.gov (United States)

    2013-09-10

    ... DEFENSE NUCLEAR FACILITIES SAFETY BOARD Senior Executive Service Performance Review Board... the membership of the Defense Nuclear Facilities Safety Board (DNFSB) Senior Executive Service (SES... rating of a senior executive's performance, the executive's response, and the higher level official's...

  1. Plant fibre composites - porosity and stiffness

    DEFF Research Database (Denmark)

    Madsen, Bo; Thygesen, Anders; Lilholt, Hans

    2009-01-01

    Plant fibre composites contain typically a relatively large amount of porosity which influences their performance. A model, based on a modified rule of mixtures, is presented to include the influence of porosity on the composite stiffness. The model integrates the volumetric composition...... of the composites with their mechanical properties. The fibre weight fraction is used as an independent parameter to calculate the complete volumetric composition. A maximum obtainable stiffness of the composites is calculated at a certain transition fibre weight fraction, which is characterised by a best possible...... combination of high fibre volume fraction and low porosity. The model is validated with experimental data from the literature on several types of composites. A stiffness diagram is presented to demonstrate that the calculations can be used for tailoring and design of composites with a given profile...

  2. Variable stiffness and damping MR isolator

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, X Z; Wang, X Y; Li, W H; Kostidis, K [University of Wollongong, School of Mechanical, Materials and Mechatronic Engineering, NSW 2522 (Australia)], E-mail: weihuali@uow.edu.au

    2009-02-01

    This paper presents the development of a magnetorheological (MR) fluid-based variable stiffness and damping isolator for vibration suppressions. The MR fluid isolator used a sole MR control unit to achieve the variable stiffness and damping in stepless and relative large scope. A mathematical model of the isolator was derived, and a prototype of the MR fluid isolator was fabricated and its dynamic behavior was measured in vibration under various applied magnetic fields. The parameters of the model under various magnetic fields were identified and the dynamic performances of isolator were evaluated.

  3. LSODE, 1. Order Stiff or Non-Stiff Ordinary Differential Equations System Initial Value Problems

    International Nuclear Information System (INIS)

    Hindmarsh, A.C.; Petzold, L.R.

    2005-01-01

    1 - Description of program or function: LSODE (Livermore Solver for Ordinary Differential Equations) solves stiff and non-stiff systems of the form dy/dt = f. In the stiff case, it treats the Jacobian matrix df/dy as either a dense (full) or a banded matrix, and as either user-supplied or internally approximated by difference quotients. It uses Adams methods (predictor-corrector) in the non-stiff case, and Backward Differentiation Formula (BDF) methods (the Gear methods) in the stiff case. The linear systems that arise are solved by direct methods (LU factor/solve). The LSODE source is commented extensively to facilitate modification. Both a single-precision version and a double-precision version are available. 2 - Methods: It is assumed that the ODEs are given explicitly, so that the system can be written in the form dy/dt = f(t,y), where y is the vector of dependent variables, and t is the independent variable. LSODE contains two variable-order, variable- step (with interpolatory step-changing) integration methods. The first is the implicit Adams or non-stiff method, of orders one through twelve. The second is the backward differentiation or stiff method (or BDF method, or Gear's method), of orders one through five. 3 - Restrictions on the complexity of the problem: The differential equations must be given in explicit form, i.e., dy/dt = f(y,t). Problems with intermittent high-speed transients may cause inefficient or unstable performance

  4. Motivation to volunteer among senior center participants.

    Science.gov (United States)

    Pardasani, Manoj

    2018-04-01

    Senior centers in the United States play a vital role in the aging continuum of care as the focal points of a community-based system of services targeting independent older adults to promote their social integration and civically engagement. Although several studies have evaluated the diversity of senior center programs, demographic characteristics of participants, and benefits of participation, very few have explored motivations to volunteer among participants. Many senior centers rely on a cadre of participants who volunteer there to assist with programs and meal services. However, a systematic examination of volunteering interests and the rationale for volunteering among senior center participants has been missing from the literature. This mixed-methods study, conducted at a large suburban senior center, explores the interests and motivations of volunteerism among the participants. The study found that there was limited interest in volunteering among senior center participants. Those who were motivated to volunteer wanted to do so in order to stay connected with their community. There was strong interest in volunteering for single events or projects rather than a long-term commitment. Implications for senior centers are discussed.

  5. Selected aspects of health literacy among seniors.

    Science.gov (United States)

    Šedová, Lenka; Doskočil, Ondřej; Brabcová, Iva; Hajduchová, Hana; Bártlová, Sylva

    2016-12-01

    This study aimed to map the selected indicators of health literacy in the senior population via a qualitative survey that focused specifically on its relationship with autonomy in the context of health literacy among seniors. A qualitative survey focused on the selected indicators of health literacy of seniors living in the South Bohemian Region of the Czech Republic (R1-19). The snowball sampling method was intentionally selected. Completed interviews were transcribed and data was reduced, analyzed, and categorized. The identified categories were 1) information comprehension, 2) decision-making in healthcare, and 3) compliance with nonpharmacologic treatment. The 'information comprehension' category clearly shows that the seniors involved in this study rated the comprehensibility of information provided by medical professionals as being good. An especially positive finding was that seniors do seek information through the internet, print sources, or other media, even though, as one senior (80-year-old woman) said, comprehension of medical information is becoming "more and more complex". The 'decision-making in healthcare' category touched upon opinions regarding informed consent and opinions regarding seniors' own involvement in healthcare. Results from this category suggest that seniors accept informed consent as a routine necessity. Inhibition regarding personal involvement in healthcare was also apparent: "... I come from a family accustomed to not bothering the doctor unnecessarily, so I just stick out my arm..." The last category of 'compliance with nonpharmacologic treatment' clearly shows that respondents are informed regarding lifestyle modifications that would benefit their treatment, although, few respondents had achieved the desired lifestyle changes. Results of this qualitative research show clear health literacy limits among seniors. As shown in this study, age itself could also be a limiting factor of health literacy.

  6. Seniority in quantum many-body systems

    International Nuclear Information System (INIS)

    Van Isacker, P.

    2010-01-01

    The use of the seniority quantum number in many-body systems is reviewed. A brief summary is given of its introduction by Racah in the context of atomic spectroscopy. Several extensions of Racah's original idea are discussed: seniority for identical nucleons in a single-j shell, its extension to the case of many, non-degenerate j shells and to systems with neutrons and protons. To illustrate its usefulness to this day, a recent application of seniority is presented in Bose-Einstein condensates of atoms with spin.

  7. Office 2010 For Seniors For Dummies

    CERN Document Server

    Wempen, Faithe

    2010-01-01

    Clear, easy-to-understand instructions for seniors who want to get the most out of Microsoft Office 2010. Seniors are buying computers—both desktops and laptops—in record numbers to stay in touch with family and friends, connect with peers, research areas of interest, make purchases online, or learn a new skill. Assuming no prior knowledge of Microsoft Office, this book is aimed at seniors who are interested in maximizing the capabilities of Microsoft Word, Excel, PowerPoint, and Outlook. Written in large typeface and featuring enlarged figures and drawings to make the book easier to read, thi

  8. Elastin in large artery stiffness and hypertension

    Science.gov (United States)

    Wagenseil, Jessica E.; Mecham, Robert P.

    2012-01-01

    Large artery stiffness, as measured by pulse wave velocity (PWV), is correlated with high blood pressure and may be a causative factor in essential hypertension. The extracellular matrix components, specifically the mix of elastin and collagen in the vessel wall, determine the passive mechanical properties of the large arteries. Elastin is organized into elastic fibers in the wall during arterial development in a complex process that requires spatial and temporal coordination of numerous proteins. The elastic fibers last the lifetime of the organism, but are subject to proteolytic degradation and chemical alterations that change their mechanical properties. This review discusses how alterations in the amount, assembly, organization or chemical properties of the elastic fibers affect arterial stiffness and blood pressure. Strategies for encouraging or reversing alterations to the elastic fibers are addressed. Methods for determining the efficacy of these strategies, by measuring elastin amounts and arterial stiffness, are summarized. Therapies that have a direct effect on arterial stiffness through alterations to the elastic fibers in the wall may be an effective treatment for essential hypertension. PMID:22290157

  9. Diagram of state of stiff amphiphilic macromolecules

    NARCIS (Netherlands)

    Markov, Vladimir A.; Vasilevskaya, Valentina V.; Khalatur, Pavel G.; ten Brinke, Gerrit; Khokhlov, Alexei R.

    2007-01-01

    We studied coil-globule transitions in stiff-chain amphiphilic macromolecules via computer modeling and constructed phase diagrams for such molecules in terms of solvent quality and persistence length. We showed that the shape of the phase diagram essentially depends on the macromolecule degree of

  10. Advanced damper with negative structural stiffness elements

    International Nuclear Information System (INIS)

    Dong, Liang; Lakes, Roderic S

    2012-01-01

    Negative stiffness is understood as the occurrence of a force in the same direction as the imposed deformation. Structures and composites with negative stiffness elements enable a large amplification in damping. It is shown in this work, using an experimental approach, that when a flexible flat-ends column is aligned in a post-buckled condition, a negative structural stiffness and large hysteresis (i.e., high damping) can be achieved provided the ends of the column undergo tilting from flat to edge contact. Stable axial dampers with initial modulus equivalent to that of the parent material and with enhanced damping were designed and built using constrained negative stiffness effects entailed by post-buckled press-fit flat-ends columns. Effective damping of approximately 1 and an effective stiffness–damping product of approximately 1.3 GPa were achieved in such stable axial dampers consisting of PMMA columns. This is a considerable improvement for this figure of merit (i.e., the stiffness–damping product), which generally cannot exceed 0.6 GPa for currently used damping layers. (paper)

  11. Parametric study of roof diaphragm stiffness requirements

    International Nuclear Information System (INIS)

    Jones, W.D.; Tenbus, M.A.

    1991-01-01

    A common assumption made in performing a dynamic seismic analysis for a building is that the roof/floor system is open-quotes rigidclose quotes. This assumption would appear to be reasonable for many of the structures found in nuclear power plants, since many of these structures are constructed of heavily reinforced concrete having floor/roof slabs at least two feet in thickness, and meet the code requirements for structural detailing for seismic design. The roofs of many Department of Energy (DOE) buildings at the Oak Ridge Y-12 Plant in Oak Ridge, Tennessee, have roofs constructed of either metal, precast concrete or gypsum plank deck overlaid with rigid insulation, tar and gravel. In performing natural phenomena hazard assessments for one such facility, it was assumed that the existing roof performed first as a flexible diaphragm (zero stiffness) and then, rigid (infinitely stiff). For the flexible diaphragm model it was determined that the building began to experience significant damage around 0.09 g's. For the rigid diaphragm model it was determined that no significant damage was observed below 0.20 g's. A Conceptual Design Report has been prepared for upgrading/replacing the roof of this building. The question that needed to be answered here was, open-quotes How stiff should the new roof diaphragm be in order to satisfy the rigid diaphragm assumption and, yet, be cost effective?close quotes. This paper presents a parametric study of a very simple structural system to show that the design of roof diaphragms needs to consider both strength and stiffness (frequency) requirements. This paper shows how the stiffness of a roof system affects the seismically induced loads in the lateral, vertical load resisting elements of a building and provides guidance in determining how open-quotes rigidclose quotes a roof system should be in order to accomplish a cost effective design

  12. The Hartree-Fock seniority approximation

    International Nuclear Information System (INIS)

    Gomez, J.M.G.; Prieto, C.

    1986-01-01

    A new self-consistent method is used to take into account the mean-field and the pairing correlations in nuclei at the same time. We call it the Hartree-Fock seniority approximation, because the long-range and short-range correlations are treated in the frameworks of Hartree-Fock theory and the seniority scheme. The method is developed in detail for a minimum-seniority variational wave function in the coordinate representation for an effective interaction of the Skyrme type. An advantage of the present approach over the Hartree-Fock-Bogoliubov theory is the exact conservation of angular momentum and particle number. Furthermore, the computational effort required in the Hartree-Fock seniority approximation is similar to that ofthe pure Hartree-Fock picture. Some numerical calculations for Ca isotopes are presented. (orig.)

  13. Senior Strategic Outreach and Engagement Officer | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The Senior Strategic Outreach and Engagement Officer provides strategic advice ... the third one in the area of knowledge management and the forth one in the area ... or the International Research Initiative on Adaptation to Climate Change.

  14. Physical Activity Helps Seniors Stay Mobile

    Science.gov (United States)

    ... Subscribe July 2014 Print this issue Health Capsule Physical Activity Helps Seniors Stay Mobile En español Send us your comments A carefully structured, moderate physical activity program helped vulnerable older people maintain their mobility. ...

  15. Boson expansion theory in the seniority scheme

    International Nuclear Information System (INIS)

    Tamura, T.; Li, C.; Pedrocchi, V.G.

    1985-01-01

    A boson expansion formalism in the seniority scheme is presented and its relation with number-conserving quasiparticle calculations is elucidated. Accuracy and convergence are demonstrated numerically. A comparative discussion with other related approaches is given

  16. Seniorer i Bevægelse. Slutevaluering

    DEFF Research Database (Denmark)

    Michelsen la Cour, Annette

    Abstract Seniorer i bevægelse Projekt Seniorer i Bevægelse var et fireårigt projekt i Københavns Kommune målrettet ældre +60, der bevægede sig mindre end anbefalet af Sundhedsstyrelsen. I perioden 2010-2014 deltog 583 borgere i fysisk træning organiseret omkring sociale netværker, heraf ca. 25...

  17. Seniorer i Bevægelse

    DEFF Research Database (Denmark)

    Michelsen la Cour, Annette

    2013-01-01

    Abstract Seniorer i bevægelse Projekt Seniorer i Bevægelse var et fireårigt projekt i Københavns Kommune målrettet ældre +60, der bevægede sig mindre end anbefalet af Sundhedsstyrelsen. I perioden 2010-2014 deltog 583 borgere i fysisk træning organiseret omkring sociale netværker, heraf ca. 25...

  18. Mixed, Nonsplit, Extended Stability, Stiff Integration of Reaction Diffusion Equations

    KAUST Repository

    Alzahrani, Hasnaa H.

    2016-01-01

    A tailored integration scheme is developed to treat stiff reaction-diffusion prob- lems. The construction adapts a stiff solver, namely VODE, to treat reaction im- plicitly together with explicit treatment of diffusion. The second-order Runge

  19. Effect of Nanotechnology Instructions on Senior High School Students

    Science.gov (United States)

    Lu, Chow-Chin; Sung, Chia-Chi

    2011-01-01

    In this research, we cooperate with senior high school teachers to understand current nanotechnology model of senior high school nanotechnology curriculum in Taiwan. Then design senior high school nanotechnology (nano-tech) curriculum to teach 503 senior high school students. After teaching the nano-tech curriculum we use the "Nanotechnology…

  20. Cultura da celebridade, fãs e a nova mídia: um estudo sobre a promoção da imagem e trabalho de Justin Bieber

    Directory of Open Access Journals (Sweden)

    Camyla da Silva Oliveira

    2016-09-01

    Full Text Available Este artigo se propõe a analisar as dinâmicas de comunicação entre Justin Bieber e seus seguidores na web, buscando compreender as formas de promoção da imagem e trabalhos do artista nas novas mídias. Nos métodos de pesquisa se destacam a netnografia das redes de fãs e análise de conteúdo para as mensagens dos canais de comunicação oficiais, além das trocas de informação entre membros do fandom. Os resultados apontam para as novas mídias como plataforma dinâmica para divulgação de informações não apenas através de canais oficiais da celebridade, mas especialmente por meio do compartilhamento e apropriação de conteúdos de fãs para fãs, que utilizam a web para criação, publicação e disseminação de mensagens, alimentando a expectativa de se comunicarem diretamente com seu ídolo.

  1. The stable stiffness triangle - drained sand during deformation cycles

    DEFF Research Database (Denmark)

    Sabaliauskas, Tomas; Ibsen, Lars Bo

    2017-01-01

    Cyclic, drained sand stiffness was observed using the Danish triaxial appa- ratus. New, deformation dependant soil property (the stable stiffness triangle) was detected. Using the the stable stiffness triangle, secant stiffness of drained sand was plausible to predict (and control) even during ir...... findings can find application in off-shore, seismic and other engi- neering practice, or inspire new branches of research and modelling wherever dynamic, cyclic or transient loaded sand is encountered....

  2. Is chronic obstructive pulmonary disease associated with increased arterial stiffness?

    DEFF Research Database (Denmark)

    Janner, Julie H; McAllister, David A; Godtfredsen, Nina S

    2012-01-01

    We hypothesize that airflow limitation is associated with increasing arterial stiffness and that having COPD increases a non-invasive measure of arterial stiffness - the aortic augmentation index (AIx) - independently of other CVD risk factors.......We hypothesize that airflow limitation is associated with increasing arterial stiffness and that having COPD increases a non-invasive measure of arterial stiffness - the aortic augmentation index (AIx) - independently of other CVD risk factors....

  3. A Rapid Aeroelasticity Optimization Method Based on the Stiffness characteristics

    OpenAIRE

    Yuan, Zhe; Huo, Shihui; Ren, Jianting

    2018-01-01

    A rapid aeroelasticity optimization method based on the stiffness characteristics was proposed in the present study. Large time expense in static aeroelasticity analysis based on traditional time domain aeroelasticity method is solved. Elastic axis location and torsional stiffness are discussed firstly. Both torsional stiffness and the distance between stiffness center and aerodynamic center have a direct impact on divergent velocity. The divergent velocity can be adjusted by changing the cor...

  4. A novel energy-efficient rotational variable stiffness actuator

    NARCIS (Netherlands)

    Rao, S.; Carloni, Raffaella; Stramigioli, Stefano

    This paper presents the working principle, the design and realization of a novel rotational variable stiffness actuator, whose stiffness can be varied independently of its output angular position. This actuator is energy-efficient, meaning that the stiffness of the actuator can be varied by keeping

  5. Direct measurement of the intrinsic ankle stiffness during standing

    NARCIS (Netherlands)

    Vlutters, Mark; Vlutters, M.; Boonstra, Tjitske; Schouten, Alfred Christiaan; van der Kooij, Herman

    2015-01-01

    Ankle stiffness contributes to standing balance, counteracting the destabilizing effect of gravity. The ankle stiffness together with the compliance between the foot and the support surface make up the ankle-foot stiffness, which is relevant to quiet standing. The contribution of the intrinsic

  6. The Stress and Stiffness Analysis of Diaphragm

    Directory of Open Access Journals (Sweden)

    Qu Dongyue

    2017-01-01

    Full Text Available Diaphragm coupling with its simple structure, small size, high reliability, which can compensate for its input and output displacement deviation by its elastic deformation, is widely used in aerospace, marine, and chemical etc. This paper uses the ANSYS software and its APDL language to analysis the stress distribution when the diaphragm under the load of torque, axial deviation, centrifugal force, angular deviation and multiple loads. We find that the value of maximum stress usually appears in the outer or inner transition region and the axial deviation has a greater influence to the distribution of the stress. Based on above, we got three kinds of stiffness for axial, angular and torque, which the stiffness of diaphragm is nearly invariable. The results can be regard as an important reference for design and optimization of diaphragm coupling.

  7. Electrothermally Actuated Microbeams With Varying Stiffness

    KAUST Repository

    Tella, Sherif Adekunle

    2017-11-03

    We present axially loaded clamped-guided microbeams that can be used as resonators and actuators of variable stiffness, actuation, and anchor conditions. The applied axial load is implemented by U-shaped electrothermal actuators stacked at one of the beams edges. These can be configured and wired in various ways, which serve as mechanical stiffness elements that control the operating resonance frequency of the structures and their static displacement. The experimental results have shown considerable increase in the resonance frequency and mid-point deflection of the microbeam upon changing the end conditions of the beam. These results can be promising for applications requiring large deflection and high frequency tunability, such as filters, memory devices, and switches. The experimental results are compared to multi-physics finite-element simulations showing good agreement among them.

  8. Stiff-Person Syndrome and Graves’ Disease

    Directory of Open Access Journals (Sweden)

    Lais Moreira Medeiros MD

    2016-12-01

    Full Text Available A 9-year-old female child presented with a history of falls, weight loss, diffuse leg pain, and progressive gait disorder, following 1 previous event described as a tonic–clonic seizure. She had increased thyroid volume, brisk symmetric reflexes, abnormal gait, and painful spasms of the paraspinal musculature. Thyroid function tests indicated biochemical hyperthyroidism, and thyrotropin receptor antibodies were positive. Her electromyography showed continuous activation of normal motor units of the paraspinal and proximal lower extremity muscles. The patient had a diagnosis of Graves’ disease with associated stiff-person syndrome, with elevated anti–glutamic acid decarboxylase antibody levels. After intravenous immunoglobulin therapy, her ambulation was substantially improved and the symptoms of stiff-person syndrome decreased dramatically.

  9. Seniors, risk and rehabilitation: broadening our thinking.

    Science.gov (United States)

    Egan, Mary Y; Laliberte Rudman, Debbie; Ceci, Christine; Kessler, Dorothy; McGrath, Colleen; Gardner, Paula; King, Judy; Lanoix, Monique; Malhotra, Ravi

    2017-06-01

    Conceptualizations of risk in seniors' rehabilitation emphasize potential physical injury, functional independence and cost containment, shifting rehabilitation from other considerations essential to promoting a satisfying life. In a two-day multidisciplinary planning meeting we critically examined and discussed alternatives to dominant conceptualizations. Invitees reflected on conceptualizations of risk in stroke rehabilitation and low vision rehabilitation, identified and explored positive and negative implications and generated alternative perspectives to support rehabilitation approaches related to living a good life. Current risk conceptualizations help focus rehabilitation teamwork and make this work publically recognizable and valued. However, they also lead to practice that is depersonalized, decontextualized and restrictive. Further research and practice development initiatives should include the voices of clinicians and seniors to more adequately support meaningfully living, and foster safe spaces for seniors and clinicians to speak candidly, comprehensively and respectfully about risk. To ensure that seniors' rehabilitation targets a satisfying life as defined by seniors, increased focus on the environment and more explicit examination of how cost containment concerns are driving services is also necessary. This work reinforced current concerns about conceptualizations of risk in seniors' rehabilitation and generated ways forward that re-focus rehabilitation more on promoting a satisfying life. Implications for rehabilitation In seniors' rehabilitation, considerations of risk focus on physical injury, functional dependence and cost containment. Focus on provider-defined risk of physical injury limits examination of patient goals and patients' histories of judging and dealing with risk. Focus on functional dependence and cost containment may lead to practice that is depersonalized and decontextualized. Abandonment of ableist and ageist thinking and an

  10. Music decreases aortic stiffness and wave reflections.

    Science.gov (United States)

    Vlachopoulos, Charalambos; Aggelakas, Angelos; Ioakeimidis, Nikolaos; Xaplanteris, Panagiotis; Terentes-Printzios, Dimitrios; Abdelrasoul, Mahmoud; Lazaros, George; Tousoulis, Dimitris

    2015-05-01

    Music has been related to cardiovascular health and used as adjunct therapy in patients with cardiovascular disease. Aortic stiffness and wave reflections are predictors of cardiovascular risk. We investigated the short-term effect of classical and rock music on arterial stiffness and wave reflections. Twenty healthy individuals (22.5±2.5 years) were studied on three different occasions and listened to a 30-min music track compilation (classical, rock, or no music for the sham procedure). Both classical and rock music resulted in a decrease of carotid-femoral pulse wave velocity (PWV) immediately after the end of music listening (all pclassical or rock music in a more sustained way (nadir by 6.0% and 5.8%, respectively, at time zero post-music listening, all pmusic preference was taken into consideration, both classical and rock music had a more potent effect on PWV in classical aficionados (by 0.20 m/s, p=0.003 and 0.13 m/s, p=0.015, respectively), whereas there was no effect in rock aficionados (all p=NS). Regarding wave reflections, classical music led to a more potent response in classical aficionados (AIx decrease by 9.45%), whereas rock led to a more potent response to rock aficionados (by 10.7%, all pMusic, both classical and rock, decreases aortic stiffness and wave reflections. Effect on aortic stiffness lasts for as long as music is listened to, while classical music has a sustained effect on wave reflections. These findings may have important implications, extending the spectrum of lifestyle modifications that can ameliorate arterial function. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  11. On the elastic stiffness of grain boundaries

    International Nuclear Information System (INIS)

    Zhang Tongyi; Hack, J.E.

    1992-01-01

    The elastic softening of grain boundaries is evaluated from the starting point of grain boundary energy. Several examples are given to illustrate the relationship between boundary energy and the extent of softening. In general, a high grain boundary energy is associated with a large excess atomic volume in the boundary region. The consequent reduction in grain boundary stiffness can represent a significant fraction of that observed in bulk crystals. (orig.)

  12. Arthrodiastasis for stiff hips in young patients

    OpenAIRE

    Cañadell, J.M. (J. M.); Gonzales, F. (F.); Barrios, R.H. (Raúl H.); Amillo, S. (Santiago)

    1993-01-01

    Joint distraction (arthrodiastasis) with a unilateral fixator was used to treat 9 patients with stiffness of the hip which had followed Perthes' disease (3), epiphysiolysis (2), congenital dysplasia (2), tuberculosis (1) and idiopathic chondrolysis (1). Their average age was 14 years, and they all had pain, limp and shortening of the leg. Distraction of 0.5 to 1 cm was maintained for an average of 94 days. The average range of movement subsequently was 65 degrees compared with 20 degrees befo...

  13. Stiff modes in spinvalve simulations with OOMMF

    Energy Technology Data Exchange (ETDEWEB)

    Mitropoulos, Spyridon [Department of Computer and Informatics Engineering, TEI of Eastern Macedonia and Thrace, Kavala (Greece); Tsiantos, Vassilis, E-mail: tsianto@teikav.edu.gr [Department of Electrical Engineering, TEI of Eastern Macedonia and Thrace, Kavala, 65404 Greece (Greece); Ovaliadis, Kyriakos [Department of Electrical Engineering, TEI of Eastern Macedonia and Thrace, Kavala, 65404 Greece (Greece); Kechrakos, Dimitris [Department of Education, ASPETE, Heraklion, Athens (Greece); Donahue, Michael [Applied and Computational Mathematics Division, NIST, Gaithersburg, MD (United States)

    2016-04-01

    Micromagnetic simulations are an important tool for the investigation of magnetic materials. Micromagnetic software uses various techniques to solve differential equations, partial or ordinary, involved in the dynamic simulations. Euler, Runge-Kutta, Adams, and BDF (Backward Differentiation Formulae) are some of the methods used for this purpose. In this paper, spinvalve simulations are investigated. Evidence is presented showing that these systems have stiff modes, and that implicit methods such as BDF are more effective than explicit methods in such cases.

  14. Water retention properties of stiff silt

    Directory of Open Access Journals (Sweden)

    Barbara Likar

    2017-06-01

    Full Text Available Recent research into the behaviour of soils has shown that it is in fact much more complex than can be described by the mechanics of saturated soils. Nowadays the trend of investigations has shifted towards the unsaturated state. Despite the signifiant progress that has been made so far, there are still a lot of unanswered questions related to the behaviour of unsaturated soils. For this reason, in the fild of geotechnics some new concepts are developed, which include the study of soil suction. Most research into soil suction has involved clayey and silty material, whereas up until recently no data have been available about measurements in very stiff preconsolidated sandy silt. Very stiff preconsolidated sandy silt is typical of the Krško Basin, where it is planned that some very important geotechnical structures will be built, so that knowledge about the behaviour of such soils at increased or decreased water content is essential. Several different methods can be used for soil suction measurements. In the paper the results of measurements carried out on very stiff preconsolidated sandy silt in a Bishop - Wesley double-walled triaxial cell are presented and compared with the results of soil suction measurements performed by means of a potentiometer (WP4C. All the measurement results were evaluated taking into account already known results given in the literature, using the three most commonly used mathematical models. Until now a lot of papers dealing with suction measurements in normal consolidated and preconsolidated clay have been published. Measurements on very stiff preconsolidated sandy silt, as presented in this paper were not supported before.

  15. The stiffness change and the increase in the ultimate capacity for a stiff pile resulting from a cyclic loading

    DEFF Research Database (Denmark)

    Lada, Aleksandra; Ibsen, Lars Bo; Nicolai, Giulio

    In the paper the experimental results of small-scale tests on a stiff monopile are presented to outline the change in stiffness during the cyclic loading and the change in the ultimate pile capacity. The results confirm the increase of stiffness and the increase in bearing capacity resulting from...

  16. Cryotherapy induces an increase in muscle stiffness.

    Science.gov (United States)

    Point, M; Guilhem, G; Hug, F; Nordez, A; Frey, A; Lacourpaille, L

    2018-01-01

    Although cold application (ie, cryotherapy) may be useful to treat sports injuries and to prevent muscle damage, it is unclear whether it has adverse effects on muscle mechanical properties. This study aimed to determine the effect of air-pulsed cryotherapy on muscle stiffness estimated using ultrasound shear wave elastography. Myoelectrical activity, ankle passive torque, shear modulus (an index of stiffness), and muscle temperature of the gastrocnemius medialis were measured before, during an air-pulsed cryotherapy (-30°C) treatment of four sets of 4 minutes with 1-minute recovery in between and during a 40 minutes postcryotherapy period. Muscle temperature significantly decreased after the second set of treatment (10 minutes: 32.3±2.5°C; Pcryotherapy induces an increase in muscle stiffness. This acute change in muscle mechanical properties may lower the amount of stretch that the muscle tissue is able to sustain without subsequent injury. This should be considered when using cryotherapy in athletic practice. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  17. Exchange stiffness of Ca-doped YIG

    Science.gov (United States)

    Avgin, I.; Huber, D. L.

    1994-05-01

    An effective medium theory for the zero-temperature exchange stiffness of uncompensated Ca-doped YIG is presented. The theory is based on the assumption that the effect of the Ca impurities is to produce strong, random ferromagnetic interactions between spins on the a and d sublattices. In the simplest version of the theory, a fraction, x, of the ad exchange integrals are large and positive, x being related to the Ca concentration. The stiffness is calculated as function of x for arbitrary perturbed ad exchange integral, Jxad. For Jxad≳(1/5)‖8Jaa+3Jdd‖, with Jaa and Jdd denoting the aa and dd exchange integrals, respectively, there is a critical concentration, Xc, such that when x≳Xc, the stiffness is complex. It is suggested that Xc delineates the region where there are significant departures from colinearity in the ground state of the Fe spins. Extension of the theory to a model where the Ca doping is assumed to generate Fe4+ ions on the tetrahedral sites is discussed. Possible experimental tests of the theory are mentioned.

  18. Seniors Falls Investigative Methodology (SFIM): A Systems Approach to the Study of Falls in Seniors

    Science.gov (United States)

    Zecevic, Aleksandra A.; Salmoni, Alan W.; Lewko, John H.; Vandervoort, Anthony A.

    2007-01-01

    An in-depth understanding of human factors and human error is lacking in current research on seniors' falls. Additional knowledge is needed to understand why seniors are falling. The purpose of this article is to describe the adapting of the Integrated Safety Investigation Methodology (ISIM) (used for investigating transportation and industrial…

  19. Static stiffness modeling of a novel hybrid redundant robot machine

    International Nuclear Information System (INIS)

    Li Ming; Wu Huapeng; Handroos, Heikki

    2011-01-01

    This paper presents a modeling method to study the stiffness of a hybrid serial-parallel robot IWR (Intersector Welding Robot) for the assembly of ITER vacuum vessel. The stiffness matrix of the basic element in the robot is evaluated using matrix structural analysis (MSA); the stiffness of the parallel mechanism is investigated by taking account of the deformations of both hydraulic limbs and joints; the stiffness of the whole integrated robot is evaluated by employing the virtual joint method and the principle of virtual work. The obtained stiffness model of the hybrid robot is analytical and the deformation results of the robot workspace under certain external load are presented.

  20. Lower Body Stiffness Modulation Strategies in Well Trained Female Athletes.

    Science.gov (United States)

    Millett, Emma L; Moresi, Mark P; Watsford, Mark L; Taylor, Paul G; Greene, David A

    2016-10-01

    Millett, EL, Moresi, MP, Watsford, ML, Taylor, PG, and Greene, DA. Lower body stiffness modulation strategies in well trained female athletes. J Strength Cond Res 30(10): 2845-2856, 2016-Lower extremity stiffness quantifies the relationship between the amount of leg compression and the external load to which the limb are subjected. This study aimed to assess differences in leg and joint stiffness and the subsequent kinematic and kinetic control mechanisms between athletes from various training backgrounds. Forty-seven female participants (20 nationally identified netballers, 13 high level endurance athletes and 14 age and gender matched controls) completed a maximal unilateral countermovement jump, drop jump and horizontal jump to assess stiffness. Leg stiffness, joint stiffness and associated mechanical parameters were assessed with a 10 camera motion analysis system and force plate. No significant differences were evident for leg stiffness measures between athletic groups for any of the tasks (p = 0.321-0.849). However, differences in joint stiffness and its contribution to leg stiffness, jump performance outcome measures and stiffness control mechanisms were evident between all groups. Practitioners should consider the appropriateness of the task utilised in leg stiffness screening. Inclusion of mechanistic and/or more sports specific tasks may be more appropriate for athletic groups.

  1. The fun culture in seniors' online communities.

    Science.gov (United States)

    Nimrod, Galit

    2011-04-01

    Previous research found that "fun on line" is the most dominant content in seniors' online communities. The present study aimed to further explore the fun culture in these communities and to discover its unique qualities. The study applied an online ethnography (netnography) approach, utilizing a full year's data from 6 leading seniors' online communities. The final database included about 50,000 posts. The majority of posts were part of online social games, including cognitive, associative, and creative games. The main subjects in all contents were sex, gender differences, aging, grandparenting, politics, faith, and alcohol. Main participatory behaviors were selective timing, using expressive style, and personalization of the online character. Although most participants were "lurkers," the active participants nurtured community norms and relationships, as reflected in the written dialogues. In a reality of limited alternatives for digital games that meet older adults' needs and interests, seniors found an independent system to satisfy their need for play. Seniors' online communities provided a unique form of casual leisure, whose nature varied among different groups of participants. The fun culture seemed to offer participants many desired benefits, including meaningful play, liminality and communitas, opportunity to practice and demonstrate their abilities, and means for coping with aging. Therefore, it may have positive impact on seniors' well-being and successful aging.

  2. "If We Are Going to Include Them We Have to Do It before We Die": Norwegian Seniors' Views of Including Seniors with Intellectual Disability in Senior Centres

    Science.gov (United States)

    Ingvaldsen, Anne Kristin; Balandin, Susan

    2011-01-01

    Background: Concepts of inclusion and participation are at the core of both international and Norwegian policy for people with intellectual disability. The aim of this study was to identify senior centre users' views of the barriers and solutions to the inclusion of seniors with intellectual disability in community senior centres. Method: Thirty…

  3. Seniority Number in Valence Bond Theory.

    Science.gov (United States)

    Chen, Zhenhua; Zhou, Chen; Wu, Wei

    2015-09-08

    In this work, a hierarchy of valence bond (VB) methods based on the concept of seniority number, defined as the number of singly occupied orbitals in a determinant or an orbital configuration, is proposed and applied to the studies of the potential energy curves (PECs) of H8, N2, and C2 molecules. It is found that the seniority-based VB expansion converges more rapidly toward the full configuration interaction (FCI) or complete active space self-consistent field (CASSCF) limit and produces more accurate PECs with smaller nonparallelity errors than its molecular orbital (MO) theory-based analogue. Test results reveal that the nonorthogonal orbital-based VB theory provides a reverse but more efficient way to truncate the complete active Hilbert space by seniority numbers.

  4. Generalized seniority states with definite isospin

    International Nuclear Information System (INIS)

    Talmi, Igal.

    2001-01-01

    Generalized seniority gives good description of the lowest states of semimagic nuclei. Recently, a very large fraction of eigenstates obtained with random two-nucleon matrix elements were shown to have the structure prescribed by generalized seniority, also for lower values of isospin. To study such states, this concept is generalized to states of nuclei with valence protons and neutrons in the same major shell. States of generalized seniority are defined and constructed. Conditions are derived on charge-independent shell-model Hamiltonians which have such states as eigenstates. From these conditions follow directly the corresponding eigenvalues. Even without an underlying group structure, these eigenvalues have the same form as in the case of protons and neutrons in the same j-orbit

  5. Senior academic physicians and retirement considerations.

    Science.gov (United States)

    Moss, Arthur J; Greenberg, Henry; Dwyer, Edward M; Klein, Helmut; Ryan, Daniel; Francis, Charles; Marcus, Frank; Eberly, Shirley; Benhorin, Jesaia; Bodenheimer, Monty; Brown, Mary; Case, Robert; Gillespie, John; Goldstein, Robert; Haigney, Mark; Krone, Ronald; Lichstein, Edgar; Locati, Emanuela; Oakes, David; Thomsen, Poul Erik Bloch; Zareba, Wojciech

    2013-01-01

    An increasing number of academic senior physicians are approaching their potential retirement in good health with accumulated clinical and research experience that can be a valuable asset to an academic institution. Considering the need to let the next generation ascend to leadership roles, when and how should a medical career be brought to a close? We explore the roles for academic medical faculty as they move into their senior years and approach various retirement options. The individual and institutional considerations require a frank dialogue among the interested parties to optimize the benefits while minimizing the risks for both. In the United States there is no fixed age for retirement as there is in Europe, but European physicians are initiating changes. What is certain is that careful planning, innovative thinking, and the incorporation of new patterns of medical practice are all part of this complex transition and timing of senior academic physicians into retirement. Copyright © 2013 Elsevier Inc. All rights reserved.

  6. VCODE, Ordinary Differential Equation Solver for Stiff and Non-Stiff Problems

    International Nuclear Information System (INIS)

    Cohen, Scott D.; Hindmarsh, Alan C.

    2001-01-01

    1 - Description of program or function: CVODE is a package written in ANSI standard C for solving initial value problems for ordinary differential equations. It solves both stiff and non stiff systems. In the stiff case, it includes a variety of options for treating the Jacobian of the system, including dense and band matrix solvers, and a preconditioned Krylov (iterative) solver. 2 - Method of solution: Integration is by Adams or BDF (Backward Differentiation Formula) methods, at user option. Corrector iteration is by functional iteration or Newton iteration. For the solution of linear systems within Newton iteration, users can select a dense solver, a band solver, a diagonal approximation, or a preconditioned Generalized Minimal Residual (GMRES) solver. In the dense and band cases, the user can supply a Jacobian approximation or let CVODE generate it internally. In the GMRES case, the pre-conditioner is user-supplied

  7. SeniorInteraktion – Innovation gennem dialog

    DEFF Research Database (Denmark)

    SeniorInteraktion er et bud på en ny strategisk tilgang til design for det gode ’ældreliv’. Kernen i dagordenen er et fokus på at designe for social interaktion, dvs. at designe for at bevare og styrke sociale relationer, at bevare eller genskabe følelsen af at blive set og høre til samt følelsen...... seniorer i levende (design) laboratorier hvor seniorernes hverdagsaktiviteter udfolder sig. Det ene fra et ældreboligkompleks i Valby. Det andet fra et motionsfællesskab i Valbyparken i København....

  8. Die senior huisvader as professionele onderwysbestuursleier

    OpenAIRE

    2014-01-01

    M.Ed. (Education Management) The aim of this research was to assess the management role of the senior housemaster/mistress in the school hostels of the Transvaal Education Department. In this regard, it was initially determined that to be able to manage, a person must also be able to lead, because management is the process of working through other people to attain departmental or organizational goals. As ''head'' of the school hostel, the senior housemaster will see that the policy, as lai...

  9. Facebook and Twitter For Seniors For Dummies

    CERN Document Server

    Collier, Marsha

    2010-01-01

    A fun and easy social media guide for the over-55 set. People over 55 were the fastest-growing user group on Facebook in the first half of 2009, and they're flocking to Twitter at a faster rate than their under-20 grandchildren. From basic information about establishing an Internet connection to rediscovering old friends, sharing messages and photos, and keeping in touch instantly with Twitter, this book by online expert Marsha Collier helps seniors jump right into social media.: Seniors are recognizing the communication possibilities of Facebook and Twitter and are signing up in record number

  10. Medication education and consultation at a senior dining program for independently living seniors.

    Science.gov (United States)

    Schmiedt, Dean; Ellingson, Jody

    2010-08-01

    To determine if pharmacist involvement within a senior dining program benefits diners by addressing their medication-related questions, using educational sessions, and providing individual consultations. Catholic Charities Senior Dining sites in central Minnesota. Pharmacists went to three senior dining sites, providing educational sessions and individual consultations to independently living senior diners. Pharmacists developed a program, in a nontraditional setting, that used educational sessions and individual consultations to assist seniors with their medication-related questions. The number of diner questions, significant issues raised, issues addressed, and level of diner satisfaction. Pharmacists made 36 visits from January to December 2009. During those visits they presented educational talks to 3,089 diners, and 12.4% of all diners spoke individually with pharmacists. Pharmacists addressed 581 questions or concerns from 384 diners. Significant issues were noted in 25.8% of individual consultations (144 questions). The most common significant issues included: adverse drug reactions (59), indications without treatment (27), and drug interactions (23). Nonopioid analgesics, antilipemics, and antihypertensive medications were most commonly involved in significant issues. Satisfaction surveys were strongly positive, with 97% indicating pharmacists had addressed their medication-related concern; only 3% did not reply. Almost half (42.7%) of satisfaction surveys indicated the diner would change something as a result of meeting with the pharmacist. Pharmacist availability in a nontraditional setting can assist seniors with addressing potentially significant medication-related issues. Independently living seniors will seek out information from a pharmacist in a convenient setting.

  11. Seniority conservation and seniority violation in the g9/2 shell

    International Nuclear Information System (INIS)

    Escuderos, A.; Zamick, L.

    2006-01-01

    The g 9/2 shell of identical particles is the first one for which one can have seniority-mixing effects. We consider three interactions: A delta interaction that conserves seniority, a quadrupole-quadrupole (Q·Q) interaction that does not, and a third one consisting of two-body matrix elements taken from experiment ( 98 Cd) that also leads to some seniority mixing. We deal with proton holes relative to a Z=50,N=50 core. One surprising result is that, for a four-particle system with total angular momentum I=4, there is one state with seniority v=4 that is an eigenstate of any two-body interaction--seniority conserving or not. The other two states are mixtures of v=2 and v=4 for the seniority-mixing interactions. The same thing holds true for I=6. Another point of interest is that, in the single-j-shell approximation, the splittings ΔE=E(I max )-E(I min ) are the same for three and five particles with a seniority conserving interaction (a well-known result), but are equal and opposite for a Q·Q interaction. We also fit the spectra with a combination of the delta and Q·Q interactions. The Z=40,N=40 core plus g 9/2 neutrons (Zr isotopes) is also considered, although it is recognized that the core is deformed

  12. The link between exercise and titin passive stiffness.

    Science.gov (United States)

    Lalande, Sophie; Mueller, Patrick J; Chung, Charles S

    2017-09-01

    What is the topic of this review? This review focuses on how in vivo and molecular measurements of cardiac passive stiffness can predict exercise tolerance and how exercise training can reduce cardiac passive stiffness. What advances does it highlight? This review highlights advances in understanding the relationship between molecular (titin-based) and in vivo (left ventricular) passive stiffness, how passive stiffness modifies exercise tolerance, and how exercise training may be therapeutic for cardiac diseases with increased passive stiffness. Exercise can help alleviate the negative effects of cardiovascular disease and cardiovascular co-morbidities associated with sedentary behaviour; this may be especially true in diseases that are associated with increased left ventricular passive stiffness. In this review, we discuss the inverse relationship between exercise tolerance and cardiac passive stiffness. Passive stiffness is the physical property of cardiac muscle to produce a resistive force when stretched, which, in vivo, is measured using the left ventricular end diastolic pressure-volume relationship or is estimated using echocardiography. The giant elastic protein titin is the major contributor to passive stiffness at physiological muscle (sarcomere) lengths. Passive stiffness can be modified by altering titin isoform size or by post-translational modifications. In both human and animal models, increased left ventricular passive stiffness is associated with reduced exercise tolerance due to impaired diastolic filling, suggesting that increased passive stiffness predicts reduced exercise tolerance. At the same time, exercise training itself may induce both short- and long-term changes in titin-based passive stiffness, suggesting that exercise may be a treatment for diseases associated with increased passive stiffness. Direct modification of passive stiffness to improve exercise tolerance is a potential therapeutic approach. Titin passive stiffness itself may

  13. Constitutive Modelling of Resins in the Stiffness Domain

    Science.gov (United States)

    Klasztorny, M.

    2004-09-01

    An analytic method for inverting the constitutive compliance equations of viscoelasticity for resins is developed. These equations describe the HWKK/H rheological model, which makes it possible to simulate, with a good accuracy, short-, medium- and long-term viscoelastic processes in epoxy and polyester resins. These processes are of first-rank reversible isothermal type. The time histories of deviatoric stresses are simulated with three independent strain history functions of fractional and normal exponential types. The stiffness equations are described by two elastic and six viscoelastic constants having a clear physic meaning (three long-term relaxation coefficients and three relaxation times). The time histories of axiatoric stresses are simulated as perfectly elastic. The inversion method utilizes approximate constitutive stiffness equations of viscoelasticity for the HWKK/H model. The constitutive compliance equations for the model are a basis for determining the exact complex shear stiffness, whereas the approximate constitutive stiffness equations are used for determining the approximate complex shear stiffness. The viscoelastic constants in the stiffness domain are derived by equating the exact and approximate complex shear stiffnesses. The viscoelastic constants are obtained for Epidian 53 epoxy and Polimal 109 polyester resins. The accuracy of the approximate constitutive stiffness equations are assessed by comparing the approximate and exact complex shear stiffnesses. The constitutive stiffness equations for the HWKK/H model are presented in uncoupled (shear/bulk) and coupled forms. Formulae for converting the constants of shear viscoelasticity into the constants of coupled viscoelasticity are given as well.

  14. Arterial stiffness assessment in patients with phenylketonuria

    Science.gov (United States)

    Hermida-Ameijeiras, Alvaro; Crujeiras, Vanesa; Roca, Iria; Calvo, Carlos; Leis, Rosaura; Couce, María-Luz

    2017-01-01

    Abstract In patients with phenylketonuria (PKU) compliant to diet greater tendency to overweight and higher inflammatory biomarkers levels than controls were reported. Although this could lead to atherogenesis, the elastic properties of large arteries in PKU patients have never been assessed. The aim of this study was to assess arterial stiffness measured by applanation tonometry in PKU patients compared to healthy controls. We carried out a cross-sectional study in 41 PKU patients (range age: 6–50 years old) and 41 age- and gender-matched healthy controls. Evaluated data included pharmacological treatment with sapropterin, clinical, and biochemical parameters. Aortic stiffness was assessed noninvasively by applanation tonometry measuring central blood pressure, aortic augmentation index (Aix@HR75), augmentation pressure (AP), and pulse wave velocity (PWV). We found higher PWV in classic PKU patients (6.60 m/second vs 5.26 m/second; P: .044). Percentage of PKU patients with PWV above 90 percentile was higher than controls (14.63% vs 2.32%; P: .048). A positive relationship was observed between the annual Phe median and PWV (r: 0.496; P: .012). PKU subjects with lower Phe tolerance showed more body weight (67.6 kg vs 56.8 kg; P: .012) and more PWV than those with higher Phe tolerance (6.55 m/second vs 5.42 m/second; P: .044). Our data show increased aortic stiffness in PKU patients, measured by applanation tonometry, when compared to healthy controls. Higher Phe levels are associated with a bigger PWV increase, which is not present in those subjects compliant to diet or under sapropterin treatment. These results could have marked effects in both research and clinical daily practice for a proper evaluation of cardiovascular risk in PKU subjects. PMID:29390507

  15. Ambulatory Arterial Stiffness Indexes in Cushing's Syndrome.

    Science.gov (United States)

    Battocchio, Marialberta; Rebellato, Andrea; Grillo, Andrea; Dassie, Francesca; Maffei, Pietro; Bernardi, Stella; Fabris, Bruno; Carretta, Renzo; Fallo, Francesco

    2017-03-01

    Long-standing exposure to endogenous cortisol excess is associated with high cardiovascular risk. The aim of our study was to investigate arterial stiffness, which has been recognized as an independent predictor of adverse cardiovascular outcome, in a group of patients with Cushing's syndrome. Twenty-four patients with Cushing's syndrome (3 males, mean age 49±13 years; 20 pituitary-dependent Cushing's disease and 4 adrenal adenoma) underwent 24-h ambulatory blood pressure monitoring (ABPM) and evaluation of cardiovascular risk factors. The Ambulatory Arterial Stiffness Index (AASI) and symmetric AASI (sAASI) were derived from ABPM tracings. Cushing patients were divided into 8 normotensive (NOR-CUSH) and 16 hypertensive (HYP-CUSH) patients, and were compared with 8 normotensive (NOR-CTR) and 16 hypertensive (HYP-CTR) control subjects, matched for demographic characteristics, 24-h ABPM and cardiometabolic risk factors. The AASI and sAASI indexes were significantly higher in Cushing patients than in controls, either in the normotensive (p=0.048 for AASI and p=0.013 for sAASI) or in the hypertensive (p=0.004 for AASI and p=0.046 for sAASI) group. No difference in metabolic parameters was observed between NOR-CUSH and NOR-CTR or between HYP-CUSH and HYP-CTR groups. AASI and sAASI were both correlated with urinary cortisol in patients with endogenous hypercortisolism (Spearman's rho=0.40, p=0.05, and 0.61, p=0.003, respectively), while no correlation was found in controls. Both AASI and sAASI are increased in Cushing syndrome, independent of BP elevation, and may represent an additional cardiovascular risk factor in this disease. The role of excess cortisol in arterial stiffness has to be further clarified. © Georg Thieme Verlag KG Stuttgart · New York.

  16. Intestinal lymphangiectasia and reversible high liver stiffness.

    Science.gov (United States)

    Milazzo, Laura; Peri, Anna Maria; Lodi, Lucia; Gubertini, Guido; Ridolfo, Anna Lisa; Antinori, Spinello

    2014-08-01

    Primary intestinal lymphangiectasia (PIL) is a protein-losing enteropathy characterized by tortuous and dilated lymph channels of the small bowel. The main symptoms are bilateral lower limb edema, serosal effusions, and vitamin D malabsorption resulting in osteoporosis. We report here a case of long-lasting misdiagnosed PIL with a peculiar liver picture, characterized by a very high stiffness value at transient elastography, which decreased with clinical improvement. The complex interplay between lymphatic and hepatic circulatory system is discussed. © 2014 by the American Association for the Study of Liver Diseases.

  17. Relative stiffness of flat conductor cables

    Science.gov (United States)

    Hankins, J. D.

    1976-01-01

    The measurement of the bending moment required to obtain a given deflection in short lengths of flat conductor cable (FCC) is presented in this report. Experimental data were taken on 10 different samples of FCC and normalized to express all bending moments (relative stiffness factor) in terms of a cable 5.1 cm (2.0 in.) in width. Data are presented in tabular and graphical form for the covenience of designers who may be interested in finding torques exerted on critical components by short lengths of FCC.

  18. Developing Senior Leaders’ Family and Social Strength in the Operational Army

    Science.gov (United States)

    2013-04-01

    April 2007): 87. 19 Joe Doty & Jeff Fenlason, “ Narcissism and Toxic Leaders,” Military Review Online, (January-February 2013): 55-60. 20...Generations at Work (New York, NY: Amacom, 2010). 40Justin Menkes, “ Narcissism : The Difference Between High Achievers and Leaders,” Harvard Business

  19. A Senior Teacher's Implementation of Technology Integration

    Science.gov (United States)

    Tsai, Hsien-Chang

    2015-01-01

    This study investigated whether a senior teacher with many years of teaching experience, despite lacking adequate technology skills or contending with other barriers, can sufficiently implement technology integration in the classroom. The research was conducted between October 2013 and January 2014 and was focused on a junior high school biology…

  20. Silver gaming : Serious fun for seniors?

    NARCIS (Netherlands)

    Loos, Eugène; Zonneveld, Annemiek

    2016-01-01

    This exploratory qualitative study provides insight into the role that exergames play for seniors. 15 participants (aged 53–78) engaged in playing Your Shape Fitness Evolved 2 on the Xbox 360 Kinect, after which we conducted a semi-structured interview with each participant. We found that in all

  1. WAEC Statistics Division Lagos. Relationship between Senior

    African Journals Online (AJOL)

    Administrator

    Relationship between Senior School Physics Students' Perceptions of ... Teacher's management abilities prevent disturbances by encouraging cooperation .... Dealing with pupils with such individual differences in the classroom is a great task for every ... The merits of such workshops cannot be over stressed and money.

  2. Career conversations in senior secondary vocational education

    NARCIS (Netherlands)

    Mittendorff, K.M.

    2010-01-01

    In the Netherlands, many schools for senior secondary vocational education are implementing competence-based curricula. These curricula start from a constructivist approach and are based on the idea that young people should learn to reflect on their personal ambitions and motives, and to undertake

  3. Recruitment and retention challenges among senior administrative ...

    African Journals Online (AJOL)

    Turnover is a problem within the senior administrative and professional staff category of the University of Cape Coast. Information gathered from the University's Personnel Section indicates that, over the decade 1987-1996, the University recorded an annual turnover rate of 8.9%. This study was therefore carried out to find ...

  4. Baggage handler seniority and musculoskeletal symptoms

    DEFF Research Database (Denmark)

    Bern, Stine Hvid; Brauer, Charlotte; Møller, Karina Lauenborg

    2013-01-01

    Heavy lifting is associated with musculoskeletal disorders but it is unclear whether it is related to acute reversible effects or to chronic effects from cumulated exposure. The aim of this study was to examine whether musculoskeletal symptoms in Danish airport baggage handlers were associated wi...... with their seniority as baggage handler, indicating chronic effects from cumulated workload....

  5. Senior Games as Serious Sport Tourism

    Science.gov (United States)

    Heo, Jimmoo; King, Carina

    2009-01-01

    Stebbins (1992) defined serious leisure as the systematic pursuit of amateur, hobbyist, or volunteer activity that is substantial and interesting for the participants involved. This study investigated associations between serious leisure and sport tourism using Indiana Senior Games participants. This study used a self-report questionnaire to…

  6. Functional Heterogeneity and Senior Management Team Effectiveness

    Science.gov (United States)

    Benoliel, Pascale; Somech, Anit

    2016-01-01

    Purpose: There has been an increasing trend toward the creation of senior management teams (SMTs) which are characterized by a high degree of functional heterogeneity. Although such teams may create better linkages to information, along with the benefits of functional heterogeneity comes the potential for conflicts that stem from the value…

  7. Students' anxiety in a senior thesis course.

    Science.gov (United States)

    Wood, M R; Palm, L J

    2000-06-01

    The State-Trait Anxiety Inventory was administered on Weeks 8, 12, and 15 of a semester to 16 students enrolled in a senior thesis course. State anxiety scores were elevated when oral presentations began and declined following the presentations. Trait anxiety scores remained constant across test administrations. The influence of situational variables on students' anxiety was discussed.

  8. The Senior Capstone, Dome or Spire?

    Science.gov (United States)

    Heinemann, Robert L.

    This paper examines a basic philosophical issue involved with the purpose of a senior capstone communication course required of all majors. The issue involves two opposites: closure, represented by the dome, and further exploration, represented by the spire. Both approaches have legitimate claims for a capstone course. There is definitely a need…

  9. Silver Gaming: Serious Fun for Seniors?

    NARCIS (Netherlands)

    Loos, E.; Zonneveld, A.; Zhou, J.; Salvendy, G.

    2016-01-01

    This exploratory qualitative study provides insight into the role that exergames play for seniors. 15 participants (aged 53-78) engaged in playing Your Shape Fitness Evolved 2 on the Xbox 360 Kinect, after which we conducted a semi-structured interview with each participant. We found that in all

  10. What Makes a Senior Thesis Good?

    Science.gov (United States)

    Trosset, Carol; Weisler, Steven

    2018-01-01

    Kuh (2008) describes the capstone as a "culminating experience" students undertake close to graduation often involving "a project of some sort that integrates and applies what they've learned" (p. 11). The senior thesis is one form of the capstone in which students write an analytic paper under faculty supervision, typically as…

  11. The Senior Year: Culminating Experiences and Transitions

    Science.gov (United States)

    Hunter, Mary Stuart, Ed.; Keup, Jennifer R., Ed.; Kinzie, Jillian, Ed.; Maietta, Heather, Ed.

    2012-01-01

    Increasing pressures on colleges and universities to ensure degree completion and job placement as measures of success make it imperative that the path to graduation is clear and that seniors receive the support needed to earn a degree and make a successful transition to life beyond college. This new edited collection describes today's college…

  12. KLM senior managers forgo controversial bonuses

    NARCIS (Netherlands)

    Grünell, M.

    2004-01-01

    In April 2004, the members of the management board of KLM waived bonuses offered to them in the run-up to the Dutch airline's merger with Air France, under pressure from trade unions and the government. During the current agreed national wage freeze, increases in senior management remuneration are

  13. Pipe elbow stiffness coefficients including shear and bend flexibility factors for use in direct stiffness codes

    International Nuclear Information System (INIS)

    Perry, R.F.

    1977-01-01

    Historically, developments of computer codes used for piping analysis were based upon the flexibility method of structural analysis. Because of the specialized techniques employed in this method, the codes handled systems composed of only piping elements. Over the past ten years, the direct stiffness method has gained great popularity because of its systematic solution procedure regardless of the type of structural elements composing the system. A great advantage is realized with a direct stiffness code that combines piping elements along with other structural elements such as beams, plates, and shells, in a single model. One common problem, however, has been the lack of an accurate pipe elbow element that would adequately represent the effects of transverse shear and bend flexibility factors. The purpose of the present paper is to present a systematic derivation of the required 12x12 stiffness matrix and load vectors for a three dimensional pipe elbow element which includes the effects of transverse shear and pipe bend flexibility according to the ASME Boiler and Pressure Vessel Code, Section III. The results are presented analytically and as FORTRAN subroutines to be directly incorporated into existing direct stiffness codes. (Auth.)

  14. Stiffness Evolution in Frozen Sands Subjected to Stress Changes

    KAUST Repository

    Dai, Sheng; Santamarina, Carlos

    2017-01-01

    Sampling affects all soils, including frozen soils and hydrate-bearing sediments. The authors monitor the stiffness evolution of frozen sands subjected to various temperature and stress conditions using an oedometer cell instrumented with P-wave transducers. Experimental results show the stress-dependent stiffness of freshly remolded sands, the dominant stiffening effect of ice, creep after unloading, and the associated exponential decrease in stiffness with time. The characteristic time for stiffness loss during creep is of the order of tens of minutes; therefore it is inevitable that frozen soils experience sampling disturbances attributable to unloading. Slow unloading minimizes stiffness loss; conversely, fast unloading causes a pronounced reduction in stiffness probably attributable to the brittle failure of ice or ice-mineral bonding.

  15. Stiffness Evolution in Frozen Sands Subjected to Stress Changes

    KAUST Repository

    Dai, Sheng

    2017-04-21

    Sampling affects all soils, including frozen soils and hydrate-bearing sediments. The authors monitor the stiffness evolution of frozen sands subjected to various temperature and stress conditions using an oedometer cell instrumented with P-wave transducers. Experimental results show the stress-dependent stiffness of freshly remolded sands, the dominant stiffening effect of ice, creep after unloading, and the associated exponential decrease in stiffness with time. The characteristic time for stiffness loss during creep is of the order of tens of minutes; therefore it is inevitable that frozen soils experience sampling disturbances attributable to unloading. Slow unloading minimizes stiffness loss; conversely, fast unloading causes a pronounced reduction in stiffness probably attributable to the brittle failure of ice or ice-mineral bonding.

  16. Analysis of Dynamic Stiffness of Bridge Cap-Pile System

    Directory of Open Access Journals (Sweden)

    Jinhui Chu

    2018-01-01

    Full Text Available In order to investigate the applicability of dynamic stiffness for bridge cap-pile system, a laboratory test was performed. A numerical model was also built for this type of system. The impact load was applied on the cap top and the dynamic stiffness was analysed. Then, the effect of the effective friction area between pile and soil was also considered. Finally, the dynamic stiffness relationship between the single pile and the cap-pile system was also compared. The results show that the dynamic stiffness is a sensitive index and can well reflect the static characteristics of the pile at the elastic stage. There is a significant positive correlation between the vertical dynamic stiffness index and bearing capacity of the cap-pile system in the similar formation environment. For the cap-pile system with four piles, the dynamic stiffness is about four times as large as the single pile between 10 and 20 Hz.

  17. Elastic metamaterial beam with remotely tunable stiffness

    Energy Technology Data Exchange (ETDEWEB)

    Qian, Wei [University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240 (China); Yu, Zhengyue [School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China); Wang, Xiaole [School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China); Lai, Yun [College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006 (China); Yellen, Benjamin B., E-mail: yellen@duke.edu [University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240 (China); Department of Mechanical Engineering and Materials Science, Duke University, P.O. Box 90300, Hudson Hall, Durham, North Carolina 27708 (United States)

    2016-02-07

    We demonstrate a dynamically tunable elastic metamaterial, which employs remote magnetic force to adjust its vibration absorption properties. The 1D metamaterial is constructed from a flat aluminum beam milled with a linear array of cylindrical holes. The beam is backed by a thin elastic membrane, on which thin disk-shaped permanent magnets are mounted. When excited by a shaker, the beam motion is tracked by a Laser Doppler Vibrometer, which conducts point by point scanning of the vibrating element. Elastic waves are unable to propagate through the beam when the driving frequency excites the first elastic bending mode in the unit cell. At these frequencies, the effective mass density of the unit cell becomes negative, which induces an exponentially decaying evanescent wave. Due to the non-linear elastic properties of the membrane, the effective stiffness of the unit cell can be tuned with an external magnetic force from nearby solenoids. Measurements of the linear and cubic static stiffness terms of the membrane are in excellent agreement with experimental measurements of the bandgap shift as a function of the applied force. In this implementation, bandgap shifts by as much as 40% can be achieved with ∼30 mN of applied magnetic force. This structure has potential for extension in 2D and 3D, providing a general approach for building dynamically tunable elastic metamaterials for applications in lensing and guiding elastic waves.

  18. Impact of matrix stiffness on fibroblast function

    Energy Technology Data Exchange (ETDEWEB)

    El-Mohri, Hichem; Wu, Yang; Mohanty, Swetaparna; Ghosh, Gargi, E-mail: gargi@umich.edu

    2017-05-01

    Chronic non-healing wounds, caused by impaired production of growth factors and reduced vascularization, represent a significant burden to patients, health care professionals, and health care system. While several wound dressing biomaterials have been developed, the impact of the mechanical properties of the dressings on the residing cells and consequently on the healing of the wounds is largely overlooked. The primary focus of this study is to explore whether manipulation of the substrate mechanics can regulate the function of fibroblasts, particularly in the context of their angiogenic activity. A photocrosslinkable hydrogel platform with orthogonal control over gel modulus and cell adhesive sites was developed to explore the quantitative relationship between ECM compliance and fibroblast function. Increase in matrix stiffness resulted in enhanced fibroblast proliferation and stress fiber formation. However, the angiogenic activity of fibroblasts was found to be optimum when the cells were seeded on compliant matrices. Thus, the observations suggest that the stiffness of the wound dressing material may play an important role in the progression of wound healing. - Highlights: • Proliferation and stress fiber formation of fibroblasts increase with increasing matrix mechanics. • Cell area correlates with the growth of fibroblasts. • Angiogenic activity of fibroblasts optimum when cells seeded on compliant gels.

  19. Multifunctional Stiff Carbon Foam Derived from Bread.

    Science.gov (United States)

    Yuan, Ye; Ding, Yujie; Wang, Chunhui; Xu, Fan; Lin, Zaishan; Qin, Yuyang; Li, Ying; Yang, Minglong; He, Xiaodong; Peng, Qingyu; Li, Yibin

    2016-07-06

    The creation of stiff yet multifunctional three-dimensional porous carbon architecture at very low cost is still challenging. In this work, lightweight and stiff carbon foam (CF) with adjustable pore structure was prepared by using flour as the basic element via a simple fermentation and carbonization process. The compressive strength of CF exhibits a high value of 3.6 MPa whereas its density is 0.29 g/cm(3) (compressive modulus can be 121 MPa). The electromagnetic interference (EMI) shielding effectiveness measurements (specific EMI shielding effectiveness can be 78.18 dB·cm(3)·g(-1)) indicate that CF can be used as lightweight, effective shielding material. Unlike ordinary foam structure materials, the low thermal conductivity (lowest is 0.06 W/m·K) with high resistance to fire makes CF a good candidate for commercial thermal insulation material. These results demonstrate a promising method to fabricate an economical, robust carbon material for applications in industry as well as topics regarding environmental protection and improvement of energy efficiency.

  20. Elastic metamaterial beam with remotely tunable stiffness

    Science.gov (United States)

    Qian, Wei; Yu, Zhengyue; Wang, Xiaole; Lai, Yun; Yellen, Benjamin B.

    2016-02-01

    We demonstrate a dynamically tunable elastic metamaterial, which employs remote magnetic force to adjust its vibration absorption properties. The 1D metamaterial is constructed from a flat aluminum beam milled with a linear array of cylindrical holes. The beam is backed by a thin elastic membrane, on which thin disk-shaped permanent magnets are mounted. When excited by a shaker, the beam motion is tracked by a Laser Doppler Vibrometer, which conducts point by point scanning of the vibrating element. Elastic waves are unable to propagate through the beam when the driving frequency excites the first elastic bending mode in the unit cell. At these frequencies, the effective mass density of the unit cell becomes negative, which induces an exponentially decaying evanescent wave. Due to the non-linear elastic properties of the membrane, the effective stiffness of the unit cell can be tuned with an external magnetic force from nearby solenoids. Measurements of the linear and cubic static stiffness terms of the membrane are in excellent agreement with experimental measurements of the bandgap shift as a function of the applied force. In this implementation, bandgap shifts by as much as 40% can be achieved with ˜30 mN of applied magnetic force. This structure has potential for extension in 2D and 3D, providing a general approach for building dynamically tunable elastic metamaterials for applications in lensing and guiding elastic waves.

  1. Seniors and Chronic Pain | NIH MedlinePlus the Magazine

    Science.gov (United States)

    ... version of this page please turn Javascript on. Seniors and Chronic Pain Past Issues / Fall 2011 Table ... the role of pain self-management can help seniors reduce or eliminate this condition. Questions to Ask ...

  2. Study Quantifies Physical Demands of Yoga in Seniors

    Science.gov (United States)

    ... Z Study Quantifies Physical Demands of Yoga in Seniors Share: A recent NCCAM-funded study measured the ... performance of seven standing poses commonly taught in senior yoga classes: Chair, Wall Plank, Tree, Warrior II, ...

  3. Exercise for Seniors: MedlinePlus Health Topic

    Science.gov (United States)

    ... GO MEDICAL ENCYCLOPEDIA Exercise and age Related Health Topics Exercise and Physical Fitness Seniors' Health Sports Fitness National Institutes of Health The primary NIH organization for research on Exercise for Seniors is the National Institute ...

  4. Students' perceptions of difficult concepts in biology in senior ...

    African Journals Online (AJOL)

    Students' perceptions of difficult concepts in biology in senior secondary schools in ... that students in Senior Secondary School Two (SSII) have difficulties in learning, the ... However, teaching strategies, students' attitude, inadequate learning ...

  5. Nutrition for Seniors: MedlinePlus Health Topic

    Science.gov (United States)

    ... America) National Institute on Aging Also in Spanish Topic Image MedlinePlus Email Updates Get Nutrition for Seniors updates by email What's this? GO Related Health Topics Nutrition Seniors' Health National Institutes of Health The ...

  6. Senior Sport er læring i virkeligheden

    DEFF Research Database (Denmark)

    Meyer, Erna Rosenlund

    2014-01-01

    Samarbejde mellem fysioterapeutudddannelsen på UCN og Aalborg senior Sport er givende for alle parter, inklusiv studerende.......Samarbejde mellem fysioterapeutudddannelsen på UCN og Aalborg senior Sport er givende for alle parter, inklusiv studerende....

  7. 76 FR 61726 - Senior Executive Service Performance Review; Correction

    Science.gov (United States)

    2011-10-05

    ... DEPARTMENT OF HOMELAND SECURITY Office of the Secretary Senior Executive Service Performance Review; Correction AGENCY: Office of the Secretary, DHS. ACTION: Notice; correction. SUMMARY: The... the appointment of the members of the Senior Executive Performance Review Boards. This correction adds...

  8. Senior's lifestyle and their store choice

    Directory of Open Access Journals (Sweden)

    Lesakova Dagmar

    2014-01-01

    Full Text Available To attract and retain customers, an understanding of their motives and reasons for selecting particular food and grocery store is needed. This is of particular importance in the growing segment of seniors. The size of the senior's market demands a better understanding of the older consumer. The aim of our study is to identify psychographic characteristics of the elderly consumer, and to indicate the lifestyle groups and the relationship between these groups and retail store attributes. Differences in the motives for patronizing specific food stores are analyzed for lifestyle groups. We use the lifestyle as a segmentation variable in the diverse population of seniors for the reason, that the lifestyle of the elderly provides more valuable information than chronological age alone. This information can be used by retailers to improve marketing strategies in order to appeal to a target group of senior shoppers. Empirical research is based on a self-administrated questionnaire aimed on the identification of the lifestyle characteristics and retail store attributes of the consumers in 65+ age, used for the choice of food purchasing retail stores. Lifestyles characteristics were measured by the respondents activities, interests and opinions (AIO. The results of the research indicate that there are differences among the lifestyle groups with significant differences in attitudes towards quality of products or internal store environment. Our research demonstrates the value of psychographic information over age alone regarding the patronage factors in store selection. Our study is a part of the research project VEGA 1/0612/12 'Determinants of the size, structure and tendences in the individual consumption of seniors'.

  9. [Strengthening of social participation of Turkish seniors].

    Science.gov (United States)

    Fietz, Jennifer; Stupp, Barbara

    2018-05-04

    Traditional municipal services are not successful at reaching Turkish seniors. Compared to native Germans Turkish seniors have a lower social participation. Do native language groups hosted by a German organization promote the social participation of Turkish seniors? How does social participation take place in the ZWAR networks (between work and retirement; a project to strengthen social participation of seniors) and which factors promote or reduce social participation? Qualitative structuring content analysis of two group discussions, which were based on guided interviews. The social participation of Turkish-speaking seniors was strengthened on three levels: (1) through regular meetings of the Turkish ethnic group social relationships were promoted and German language skills and other skills were improved. Through mutual sharing and understanding of the stressors specific to migration, emotional support was provided. The sharing of mutual cultural and linguistic backgrounds created a sense of community and meetings were perceived as an antidote to migrants' exhausting lives in German society. (2) At the organizational level, participation was promoted through extensive group events. Regardless of their cultural background all participants identified as equal ZWAR members. The ZWAR project functioned as an umbrella organization for participation in the intercultural context. (3) Participation in community events created contacts with community stakeholders and fostered volunteer work. Hence, participants were able to use their skills, and therefore broaden their horizons. Turkish ZWAR networks promoted the social participation of members because integration with their ethnic group reduced access barriers, broadened members' scopes of action, and created new opportunities for participation.

  10. Direct measurement of the intrinsic ankle stiffness during standing.

    Science.gov (United States)

    Vlutters, M; Boonstra, T A; Schouten, A C; van der Kooij, H

    2015-05-01

    Ankle stiffness contributes to standing balance, counteracting the destabilizing effect of gravity. The ankle stiffness together with the compliance between the foot and the support surface make up the ankle-foot stiffness, which is relevant to quiet standing. The contribution of the intrinsic ankle-foot stiffness to balance, and the ankle-foot stiffness amplitude dependency remain a topic of debate in the literature. We therefore developed an experimental protocol to directly measure the bilateral intrinsic ankle-foot stiffness during standing balance, and determine its amplitude dependency. By applying fast (40 ms) ramp-and-hold support surface rotations (0.005-0.08 rad) during standing, reflexive contributions could be excluded, and the amplitude dependency of the intrinsic ankle-foot stiffness was investigated. Results showed that reflexive activity could not have biased the torque used for estimating the intrinsic stiffness. Furthermore, subjects required less recovery action to restore balance after bilateral rotations in opposite directions compared to rotations in the same direction. The intrinsic ankle-foot stiffness appears insufficient to ensure balance, ranging from 0.93±0.09 to 0.44±0.06 (normalized to critical stiffness 'mgh'). This implies that changes in muscle activation are required to maintain balance. The non-linear stiffness decrease with increasing rotation amplitude supports the previous published research. With the proposed method reflexive effects can be ruled out from the measured torque without any model assumptions, allowing direct estimation of intrinsic stiffness during standing. Copyright © 2015 Elsevier Ltd. All rights reserved.

  11. A novel variable stiffness mechanism for dielectric elastomer actuators

    Science.gov (United States)

    Li, Wen-Bo; Zhang, Wen-Ming; Zou, Hong-Xiang; Peng, Zhi-Ke; Meng, Guang

    2017-08-01

    In this paper, a novel variable stiffness mechanism is proposed for the design of a variable stiffness dielectric elastomer actuator (VSDEA) which combines a flexible strip with a DEA in a dielectric elastomer minimum energy structure. The DEA induces an analog tuning of the transverse curvature of the strip, thus conveniently providing a voltage-controllable flexural rigidity. The VSDEA tends to be a fully flexible and compact structure with the advantages of simplicity and fast response. Both experimental and theoretical investigations are carried out to reveal the variable stiffness performances of the VSDEA. The effect of the clamped location on the bending stiffness of the VSDEA is analyzed, and then effects of the lengths, the loading points and the applied voltages on the bending stiffness are experimentally investigated. An analytical model is developed to verify the availability of this variable stiffness mechanism, and the theoretical results demonstrate that the bending stiffness of the VSDEA decreases as the applied voltage increases, which agree well with the experimental data. Moreover, the experimental results show that the maximum change of the relative stiffness can reach about 88.80%. It can be useful for the design and optimization of active variable stiffness structures and DEAs for soft robots, vibration control, and morphing applications.

  12. Stiffness and the automatic selection of ODE codes

    International Nuclear Information System (INIS)

    Shampine, L.F.

    1984-01-01

    The author describes the basic ideas behind the most popular methods for the numerical solution of ordinary differential equations (ODEs). He takes up the qualitative behavior of solutions of ODEs and its relation ot the propagation of numerical error. Codes for ODEs are intended either for stiff problems or for non-stiff problems. The difference is explained. Users of codes do not have the information needed to recognize stiffness. A code, DEASY, which automatically recognizes stiffness and selects a suitable method is described

  13. Fatigue crack paths under the influence of changes in stiffness

    Directory of Open Access Journals (Sweden)

    G. Kullmer

    2016-02-01

    Full Text Available An important topic of the Collaborative Research Centre TRR 30 of the Deutsche Forschungsgemeinschaft (DFG is the crack growth behaviour in graded materials. In addition, the growth of cracks in the neighbourhood of regions and through regions with different material properties belongs under this topic. Due to the different material properties, regions with differing stiffness compared to the base material may arise. Regions with differing stiffness also arise from ribs, grooves or boreholes. Since secure findings on the propagation behaviour of fatigue cracks are essential for the evaluation of the safety of components and structures, the growth of cracks near changes in stiffness has to be considered, too. Depending on the way a crack penetrates the zone of influence of such a change in stiffness and depending on whether this region is more compliant or stiffer than the surrounding area the crack may grow towards or away from this region. Both cases result in curved crack paths that cannot be explained only by the global loading situation. To evaluate the influence of regions with differing stiffness on the path of fatigue cracks the paths and the stress intensity factors of cracks growing near and through regions with differing stiffness are numerically determined with the program system ADAPCRACK3D. Therefore, arrangements of changes in stiffness modelled as material inclusions with stiffness properties different from the base material or modelled as ribs and grooves are systematically varied to develop basic conclusions about the crack growth behaviour near and through changes in stiffness.

  14. On prestress stiffness analysis of bolt-plate contact assemblies

    DEFF Research Database (Denmark)

    Pedersen, Niels Leergaard; Pedersen, Pauli

    2008-01-01

    , but with finite element (FE) and contact analysis, it is possible to find the stiffness of the member. In the case of many connections and for practical applications, it is not suitable to make a full FE analysis. The purpose of the present paper is to find simplified expressions for the stiffness of the member......, including the case when the width of the member is limited. The calculation of the stiffness is based on the FE, including the solution to the contact problem, and we express the stiffness as a function of the elastic energy in the structure, whereby the definition of the displacements related...

  15. Ball Bearing Stiffnesses- A New Approach Offering Analytical Expressions

    Science.gov (United States)

    Guay, Pascal; Frikha, Ahmed

    2015-09-01

    Space mechanisms use preloaded ball bearings in order to withstand the severe vibrations during launch.The launch strength requires the calculation of the bearing stiffness, but this calculation is complex. Nowadays, there is no analytical expression that gives the stiffness of a bearing. Stiffness is computed using an iterative algorithm such as Newton-Raphson, to solve the nonlinear system of equations.This paper aims at offering a simplified analytical approach, based on the assumption that the contact angle is constant. This approach gives analytical formulas of the stiffness of preloaded ball bearing.

  16. Low frequency noise reduction using stiff light composite panels

    Institute of Scientific and Technical Information of China (English)

    DENG Yongchang; LIN Weizheng

    2003-01-01

    The experiment presented in this paper is to investigate and analyze the noise reduction at low frequency using stiff light composite panels. Since these composite panels are made of lightweight and stiff materials, this actuation strategy will enable the creation of composite panels for duct noise control without using traditional heavy structural mass. The results suggest that the mass-spring resonance absorption in the case of a comparatively stiff thick panel with a thin flexible plate is more efficient with minimum weight, when subjected to low-frequency (<500 Hz). The efficiency of the panel absorber depends on the mass of the thin flexible plate and the stiffness of the panel.

  17. 76 FR 76122 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2011-12-06

    ... CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD Senior Executive Service Performance Review Board... change in the membership of the Senior Executive Service Performance Review Board for the Chemical Safety... Senior Executive Service (SES) and makes recommendations as to final annual performance ratings for...

  18. Senior Surfing: Computer Use, Aging, and Formal Training

    Science.gov (United States)

    Warren-Peace, Paula; Parrish, Elaine; Peace, C. Brian; Xu, Jianzhong

    2008-01-01

    In this article, we describe data from two case studies of seniors (one younger senior and one older senior) in learning to use computers. The study combined interviews, observations, and documents to take a close look at their experiences with computers, as well as the influences of aging and computer training on their experiences. The study…

  19. 75 FR 70002 - Senior Executive Service Performance Review Board; Membership

    Science.gov (United States)

    2010-11-16

    ... ENVIRONMENTAL PROTECTION AGENCY [FRL-9227-3] Senior Executive Service Performance Review Board... review and evaluate the initial appraisal of a senior executive's performance by the supervisor, along with any recommendations to the appointment authority relative to the performance of the senior...

  20. 78 FR 5516 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2013-01-25

    ... OCCUPATIONAL SAFETY AND HEALTH REVIEW COMMISSION Senior Executive Service Performance Review Board Membership AGENCY: Occupational Safety and Health Review Commission. ACTION: Annual notice. SUMMARY: Notice... established a Senior Executive Service PRB. The PRB reviews and evaluates the initial appraisal of a senior...

  1. 75 FR 14214 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2010-03-24

    ... OCCUPATIONAL SAFETY AND HEALTH REVIEW COMMISSION Senior Executive Service Performance Review Board Membership AGENCY: Occupational Safety and Health Review Commission. ACTION: Annual notice. SUMMARY: Notice... established a Senior Executive Service PRB. The PRB reviews and evaluates the initial appraisal of a senior...

  2. 75 FR 55816 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2010-09-14

    ... DEPARTMENT OF THE INTERIOR Council of the Inspectors General on Integrity and Efficiency Senior..., each agency is required to establish one or more Senior Executive Service (SES) performance review boards. The purpose of these boards is to review and evaluate the initial appraisal of a senior executive...

  3. 76 FR 39926 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2011-07-07

    ... OCCUPATIONAL SAFETY AND HEALTH REVIEW COMMISSION Senior Executive Service Performance Review Board Membership AGENCY: Occupational Safety and Health Review Commission. ACTION: Annual notice. SUMMARY: Notice... established a Senior Executive Service PRB. The PRB reviews and evaluates the initial appraisal of a senior...

  4. 76 FR 70131 - Senior Executive Service Performance Review Board; Membership

    Science.gov (United States)

    2011-11-10

    ... ENVIRONMENTAL PROTECTION AGENCY [FRL-9489-5] Senior Executive Service Performance Review Board... review and evaluate the initial appraisal of a senior executive's performance by the supervisor, along with any recommendations to the appointment authority relative to the performance of the senior...

  5. 77 FR 65685 - Senior Executive Service Performance Review Board; Membership

    Science.gov (United States)

    2012-10-30

    ... ENVIRONMENTAL PROTECTION AGENCY [FRL-9747-4] Senior Executive Service Performance Review Board... performance review boards. This board shall review and evaluate the initial appraisal of a senior executive's... performance of the senior executive. Members of the 2012 EPA Performance Review Board are: Benita Best-Wong...

  6. 78 FR 77125 - Senior Executive Service Performance Review Board; Membership

    Science.gov (United States)

    2013-12-20

    ... ENVIRONMENTAL PROTECTION AGENCY [FRL-9904-20-OARM] Senior Executive Service Performance Review... review boards. This board shall review and evaluate the initial appraisal of a senior executive's... performance of the senior executive. Members of the 2013 EPA Performance Review Board are: Benita Best-Wong...

  7. Senior Enlisted Advisor to the CNGB - The National Guard

    Science.gov (United States)

    ARNG Readiness Home : Leadership : SEA Senior Enlisted Advisor to the CNGB Command Sergeant Major Christopher Kepner Command Sergeant Major Christopher Kepner currently serves as the Senior Enlisted Advisor include the United States Army Sergeants Major Academy, Senior Enlisted Joint Professional Military

  8. 78 FR 67147 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2013-11-08

    ... FEDERAL RETIREMENT THRIFT INVESTMENT BOARD Senior Executive Service Performance Review Board... appointment of the members of the Senior Executive Service Performance Review Boards for the Federal... actions for members of the Senior Executive Service. DATES: This notice is effective November 5, 2013. FOR...

  9. 78 FR 44563 - Senior Executive Service (SES) Performance Review Board

    Science.gov (United States)

    2013-07-24

    ... FEDERAL LABOR RELATIONS AUTHORITY Senior Executive Service (SES) Performance Review Board AGENCY... Management, one or more PRBs. The PRB shall review and evaluate the initial appraisal of a senior executive's performance by the supervisor, along with any response by the senior executive, and make recommendations to...

  10. 75 FR 53786 - Senior Community Service Employment Program; Final Rule

    Science.gov (United States)

    2010-09-01

    ... Part IV Department of Labor Employment and Training Administration 20 CFR Part 641 Senior... Administration 20 CFR Part 641 RIN 1205-AB48 and RIN 1205-AB47 Senior Community Service Employment Program; Final... implement changes in the Senior Community Service Employment Program (SCSEP) resulting from the 2006...

  11. 78 FR 57837 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2013-09-20

    ... CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD Senior Executive Service Performance Review Board... change in the membership of the Senior Executive Service Performance Review Board for the Chemical Safety... Senior Executive Service (SES) and makes recommendations as to final annual performance ratings for...

  12. 76 FR 78257 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2011-12-16

    ... FEDERAL RETIREMENT THRIFT INVESTMENT BOARD Senior Executive Service Performance Review Board... appointment of the members of the Senior Executive Service Performance Review Boards for the Federal... appropriate personnel actions for members of the Senior Executive Service. DATES: This notice is effective...

  13. 75 FR 1028 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2010-01-08

    ... CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD Senior Executive Service Performance Review Board... change in the membership of the Senior Executive Service Performance Review Board for the Chemical Safety... performance ratings of members of the Senior Executive Service (SES) and makes recommendations as to final...

  14. 77 FR 51523 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2012-08-24

    ... COUNCIL OF THE INSPECTORS GENERAL ON INTEGRITY AND EFFICIENCY Senior Executive Service Performance... required to establish one or more Senior Executive Service (SES) performance review boards. The purpose of these boards is to review and evaluate the initial appraisal of a senior executive's performance by the...

  15. 77 FR 70779 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2012-11-27

    ... FEDERAL RETIREMENT THRIFT INVESTMENT BOARD Senior Executive Service Performance Review Board... appointment of the members of the Senior Executive Service Performance Review Boards for the Federal... actions for members of the Senior Executive Service. DATES: This notice is effective November 27, 2012...

  16. 77 FR 66191 - Senior Executive Service-Performance Review Board

    Science.gov (United States)

    2012-11-02

    ... OFFICE OF PERSONNEL MANAGEMENT Senior Executive Service--Performance Review Board AGENCY: Office... performance review boards. The board reviews and evaluates the initial appraisal of a senior executive's... performance of the senior executive. U.S. Office of Personnel Management. John Berry, Director. The following...

  17. 76 FR 81998 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2011-12-29

    ... OCCUPATIONAL SAFETY AND HEALTH REVIEW COMMISSION Senior Executive Service Performance Review Board Membership AGENCY: Occupational Safety and Health Review Commission. ACTION: Annual notice. SUMMARY: Notice... established a Senior Executive Service PRB. The PRB reviews and evaluates the initial appraisal of a senior...

  18. 78 FR 52513 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2013-08-23

    ... COUNCIL OF THE INSPECTORS GENERAL ON INTEGRITY AND EFFICIENCY Senior Executive Service Performance... Management, each agency is required to establish one or more Senior Executive Service (SES) performance review boards. The purpose of these boards is to review and evaluate the initial appraisal of a senior...

  19. 76 FR 57947 - Senior Executive Service Performance Review Board Membership

    Science.gov (United States)

    2011-09-19

    ... AND EFFICIENCY Senior Executive Service Performance Review Board Membership AGENCY: Council of the... of Personnel Management, each agency is required to establish one or more Senior Executive Service... appraisal of a senior executive's performance by the supervisor, along with any recommendations to the...

  20. Pulling a polymer with anisotropic stiffness near a sticky wall

    International Nuclear Information System (INIS)

    Tabbara, R; Owczarek, A L

    2012-01-01

    We solve exactly a two-dimensional partially directed walk model of a semi-flexible polymer that has one end tethered to a sticky wall, while a pulling force away from the adsorbing surface acts on the free end of the walk. This model generalizes a number of previously considered adsorption models by incorporating individual horizontal and vertical stiffness effects, in competition with a variable pulling angle. A solution to the corresponding generating function is found by means of the kernel method. While the phases and related phase transitions are similar in nature to those found previously the analysis of the model in terms of its physical variables highlights various novel structures in the shapes of the phase diagrams and related behaviour of the polymer. We review the results of previously considered sub-cases, augmenting these findings to include analysis with respect to the model’s physical variables—namely, temperature, pulling force, pulling angle away from the surface, stiffness strength and the ratio of vertical to horizontal stiffness potentials, with our subsequent analysis for the general model focusing on the effect that stiffness has on this pulling angle range. In analysing the model with stiffness we also pay special attention to the case where only vertical stiffness is included. The physical analysis of this case reveals behaviour more closely resembling that of an upward pulling force acting on a polymer than it does of a model where horizontal stiffness acts. The stiffness–temperature phase diagram exhibits re-entrance for low temperatures, previously only seen for three-dimensional or co-polymer models. For the most general model we delineate the shift in the physical behaviour as we change the ratio of vertical to horizontal stiffness between the horizontal-only and the vertical-only stiffness regimes. We find that a number of distinct physical characteristics will only be observed for a model where the vertical stiffness dominates

  1. Salt-induced aggregation of stiff polyelectrolytes

    International Nuclear Information System (INIS)

    Fazli, Hossein; Mohammadinejad, Sarah; Golestanian, Ramin

    2009-01-01

    Molecular dynamics simulation techniques are used to study the process of aggregation of highly charged stiff polyelectrolytes due to the presence of multivalent salt. The dominant kinetic mode of aggregation is found to be the case of one end of one polyelectrolyte meeting others at right angles, and the kinetic pathway to bundle formation is found to be similar to that of flocculation dynamics of colloids as described by Smoluchowski. The aggregation process is found to favor the formation of finite bundles of 10-11 filaments at long times. Comparing the distribution of the cluster sizes with the Smoluchowski formula suggests that the energy barrier for the aggregation process is negligible. Also, the formation of long-lived metastable structures with similarities to the raft-like structures of actin filaments is observed within a range of salt concentration.

  2. Discrete computational mechanics for stiff phenomena

    KAUST Repository

    Michels, Dominik L.

    2016-11-28

    Many natural phenomena which occur in the realm of visual computing and computational physics, like the dynamics of cloth, fibers, fluids, and solids as well as collision scenarios are described by stiff Hamiltonian equations of motion, i.e. differential equations whose solution spectra simultaneously contain extremely high and low frequencies. This usually impedes the development of physically accurate and at the same time efficient integration algorithms. We present a straightforward computationally oriented introduction to advanced concepts from classical mechanics. We provide an easy to understand step-by-step introduction from variational principles over the Euler-Lagrange formalism and the Legendre transformation to Hamiltonian mechanics. Based on such solid theoretical foundations, we study the underlying geometric structure of Hamiltonian systems as well as their discrete counterparts in order to develop sophisticated structure preserving integration algorithms to efficiently perform high fidelity simulations.

  3. Effect of exercise on arterial stiffness

    DEFF Research Database (Denmark)

    Montero, David; Andersen, Andreas Breenfeldt; Oberholzer, Laura

    2017-01-01

    points (P = 0.196) although a linear decreasing trend was detected (P = 0.016). CONCLUSIONS: Central AS augments during a conventional ET intervention that effectively enhances aerobic exercise capacity in young individuals. This suggests that normal, healthy elastic arteries are not amendable......BACKGROUND: Whether arterial stiffness (AS) can be improved by regular exercise in healthy individuals remains equivocal according to cross-sectional and longitudinal studies assessing arterial properties at discrete time points. The purpose of the present study was to pinpoint the time course......), in 9 previously untrained healthy normotensive adults (27 ± 4 years) with no history of cardiovascular disease. Exercise capacity was assessed by maximal oxygen consumption (VO2max) elicited by incremental ergometry. RESULTS: VO2max increased throughout the ET intervention (+12% from week 0 to week 8...

  4. Designing a Facebook interface for senior users.

    Science.gov (United States)

    Gomes, Gonçalo; Duarte, Carlos; Coelho, José; Matos, Eduardo

    2014-01-01

    The adoption of social networks by older adults has increased in recent years. However, many still cannot make use of social networks as these are simply not adapted to them. Through a series of direct observations, interviews, and focus groups, we identified recommendations for the design of social networks targeting seniors. Based on these, we developed a prototype for tablet devices, supporting sharing and viewing Facebook content. We then conducted a user study comparing our prototype with Facebook's native mobile application. We have found that Facebook's native application does not meet senior users concerns, like privacy and family focus, while our prototype, designed in accordance with the collected recommendations, supported relevant use cases in a usable and accessible manner.

  5. iPad For Seniors For Dummies

    CERN Document Server

    Muir, Nancy C

    2010-01-01

    The full-color guide to the exciting new iPad, written specifically with the needs of seniors in mind!. The iPad is the perfect device for the senior market, combining the Web, e-mail, photos, video, and book reading into an intuitive, portable device. Written by veteran Dummies author Nancy Muir, this fun and friendly guide shows you how to use the many features and capabilities of the iPad to make life easier! You'll learn how to use the multitouch screen to zoom in and out on Web pages and choose a font and size that makes reading comfortable so that you can get directions, plan vacations,

  6. Designing a Facebook Interface for Senior Users

    Directory of Open Access Journals (Sweden)

    Gonçalo Gomes

    2014-01-01

    Full Text Available The adoption of social networks by older adults has increased in recent years. However, many still cannot make use of social networks as these are simply not adapted to them. Through a series of direct observations, interviews, and focus groups, we identified recommendations for the design of social networks targeting seniors. Based on these, we developed a prototype for tablet devices, supporting sharing and viewing Facebook content. We then conducted a user study comparing our prototype with Facebook's native mobile application. We have found that Facebook's native application does not meet senior users concerns, like privacy and family focus, while our prototype, designed in accordance with the collected recommendations, supported relevant use cases in a usable and accessible manner.

  7. A comparative study on free vibration analysis of delaminated torsion stiff and bending stiff composite shells

    International Nuclear Information System (INIS)

    Dey, Sudip; Karmakar, Amit

    2013-01-01

    This paper presents a finite element method to compare the effects of delamination on free vibration of graphite-epoxy bending stiff and torsion stiff composite pretwisted shallow conical shells. The generalized dynamic equilibrium equation is derived from Lagrange's equation of motion neglecting the Coriolis effect for moderate rotational speeds. An eight noded isoparametric plate bending element is employed incorporating rotary inertia and effects of transverse shear deformation based on Mindlin's theory. The multipoint constraint; algorithm is utilized to ensure the compatibility of deformation and equilibrium of resultant forces and moments at the delamination crack front. The standard eigen value problem is solved by applying the QR iteration algorithm. Mode shapes for typical configurations are also depicted. Numerical results obtained are the first known non-dimensional frequencies which could serve as reference solutions for the future investigators.

  8. Seniorer i Bevægelse

    DEFF Research Database (Denmark)

    Michelsen la Cour, Annette

    2014-01-01

    Projekt Seniorer i Bevægelse var et fireårigt projekt i Københavns Kommune målrettet ældre +60, der bevægede sig mindre end anbefalet af Sundhedsstyrelsen. I perioden 2010-2014 deltog 583 borgere i fysisk træning organiseret omkring sociale netværker, ca. 25% blev rekrutteret i et samarbejde med en...

  9. Enhancing Identity Development at Senior Service Colleges

    Science.gov (United States)

    2016-12-01

    also act as a “ think factory” for commanders and civilian leaders at the strategic level worldwide and routinely engage in discourse and debate...current and past senior leaders, helping them bet - ter appreciate the decisions and activities those lead- ers undertook so as to ease their own...to instill “requisite values, strategic, and critical thinking skills to keep pace with the [changing] strategic environment.”78 Six DLAs were

  10. Cascades in multiplex financial networks with debts of different seniority

    Science.gov (United States)

    Brummitt, Charles D.; Kobayashi, Teruyoshi

    2015-06-01

    The seniority of debt, which determines the order in which a bankrupt institution repays its debts, is an important and sometimes contentious feature of financial crises, yet its impact on systemwide stability is not well understood. We capture seniority of debt in a multiplex network, a graph of nodes connected by multiple types of edges. Here an edge between banks denotes a debt contract of a certain level of seniority. Next we study cascading default. There exist multiple kinds of bankruptcy, indexed by the highest level of seniority at which a bank cannot repay all its debts. Self-interested banks would prefer that all their loans be made at the most senior level. However, mixing debts of different seniority levels makes the system more stable in that it shrinks the set of network densities for which bankruptcies spread widely. We compute the optimal ratio of senior to junior debts, which we call the optimal seniority ratio, for two uncorrelated Erdős-Rényi networks. If institutions erode their buffer against insolvency, then this optimal seniority ratio rises; in other words, if default thresholds fall, then more loans should be senior. We generalize the analytical results to arbitrarily many levels of seniority and to heavy-tailed degree distributions.

  11. Mechanically stiff, electrically conductive composites of polymers and carbon nanotubes

    Energy Technology Data Exchange (ETDEWEB)

    Worsley, Marcus A.; Kucheyev, Sergei O.; Baumann, Theodore F.; Kuntz, Joshua D.; Satcher, Jr., Joe H.; Hamza, Alex V.

    2017-10-17

    Using SWNT-CA as scaffolds to fabricate stiff, highly conductive polymer (PDMS) composites. The SWNT-CA is immersing in a polymer resin to produce a SWNT-CA infiltrated with a polymer resin. The SWNT-CA infiltrated with a polymer resin is cured to produce the stiff and electrically conductive composite of carbon nanotube aerogel and polymer.

  12. Mechanically stiff, electrically conductive composites of polymers and carbon nanotubes

    Science.gov (United States)

    Worsley, Marcus A.; Kucheyev, Sergei O.; Baumann, Theodore F.; Kuntz, Joshua D.; Satcher, Jr., Joe H.; Hamza, Alex V.

    2015-07-21

    Using SWNT-CA as scaffolds to fabricate stiff, highly conductive polymer (PDMS) composites. The SWNT-CA is immersing in a polymer resin to produce a SWNT-CA infiltrated with a polymer resin. The SWNT-CA infiltrated with a polymer resin is cured to produce the stiff and electrically conductive composite of carbon nanotube aerogel and polymer.

  13. A prototype of a novel energy efficient variable stiffness actuator

    NARCIS (Netherlands)

    Visser, L.C.; Carloni, Raffaella; Klijnstra, F.; Stramigioli, Stefano

    In this work, we present a proof of concept of a novel variable stiffness actuator. The actuator design is based on the conceptual design proposed in earlier work, and is such that the apparent output stiffness of the actuator can be changed independently of the output position and without any

  14. Current front stiffness of European vehicles with regard to compatibility

    NARCIS (Netherlands)

    Huibers, J.; Beer, E. de

    2001-01-01

    EuroNCAP tests are carried out since 1997. The test procedure in general is comparable to the EC Directive 96/79 with a test speed of 64 km/h. This increased test speed implies a higher frontal stiffness for new vehicle designs in order to achieve a high ranking. This frontal stiffness is one of the

  15. Optimization of a quasi-zero-stiffness isolator

    International Nuclear Information System (INIS)

    Carrella, A.; Brennan, M. J.; Waters, T. P.

    2007-01-01

    The frequency range over which a mount can isolate a mass from a vibrating base (or vice versa) is often limited by the mount stiffness required to support the weight of the mass. This compromise can be made more favourable by employing non-linear mounts with a softening spring characteristic such that small excursions about the static equilibrium position result in small dynamic spring forces and a correspondingly low natural frequency. This paper concerns the force-displacement characteristic of a so-called quasi-zero-stiffness (QZS) mechanism which is characterised by an appreciable static stiffness but very small (theoretically zero) dynamic stiffness. The mechanism studied comprises a vertical spring acting in parallel with two further springs which, when inclined at an appropriate angle to the vertical, produce a cancelling negative stiffness effect. Analysis of the system shows that a QZS characteristic can be obtained if the systems parameters (angle of inclination and ratio of spring stiffness) are opportunely chosen. By introducing the additional criterion that the displacement of the system be largest without exceeding a desired (low) value of stiffness an optimal set of parameter values is derived. Under sufficiently large displacements the stiffness of the QZS mechanism can eventually exceed that of the simple mass-spring system and criteria for this detrimental scenario to arise are presented

  16. Outcomes of senior reach gatekeeper referrals: comparison of the Spokane gatekeeper program, Colorado Senior Reach, and Mid-Kansas Senior Outreach.

    Science.gov (United States)

    Bartsch, David A; Rodgers, Vicki K; Strong, Don

    2013-01-01

    Outcomes of older adults referred for care management and mental health services through the senior reach gatekeeper model of case finding were examined in this study and compared with the Spokane gatekeeper model Colorado Senior Reach and the Mid-Kansas Senior Outreach (MKSO) programs are the two Senior Reach Gatekeeper programs modeled after the Spokane program, employing the same community education and gatekeeper model and with mental health treatment for elderly adults in need of support. The three mature programs were compared on seniors served isolation, and depression ratings. Nontraditional community gatekeepers were trained and referred seniors in need. Findings indicate that individuals served by the two Senior Reach Gatekeeper programs demonstrated significant improvements. Isolation indicators such as social isolation decreased and depression symptoms and suicide ideation also decreased. These findings for two Senior Reach Gatekeeper programs demonstrate that the gatekeeper approach to training community partners worked in referring at-risk seniors in need in meeting their needs, and in having a positive impact on their lives.

  17. [The participation of seniors in volunteer activities: a systematic review].

    Science.gov (United States)

    Godbout, Elisabeth; Filiatrault, Johanne; Plante, Michelle

    2012-02-01

    Volunteer work can be a very significant form of social participation for seniors. It can also provide seniors with important physical and psychological health benefits. This explains why occupational therapists and other health care professionals, as well as community workers who are concerned with healthy aging, appeal to seniors to volunteer in health promotion and community support However, the recruitment and ongoing involvement of seniors as volunteers is often challenging. A systematic review of the literature was undertaken to enlighten practitioners working in this domain. The objective was to identify factors that influence seniors' participation in volunteer work. Six bibliographic databases were searched using key words. A total of 27 relevant papers were retrieved and allowed an identification of a series of factors that could influence seniors' participation in volunteer work, namely personal factors, environmental factors, and occupational factors. This analysis leads to practical guidelines for facilitating the recruitment and maintenance of seniors' engagement in volunteer work.

  18. Seniority zero pair coupled cluster doubles theory

    International Nuclear Information System (INIS)

    Stein, Tamar; Henderson, Thomas M.; Scuseria, Gustavo E.

    2014-01-01

    Coupled cluster theory with single and double excitations accurately describes weak electron correlation but is known to fail in cases of strong static correlation. Fascinatingly, however, pair coupled cluster doubles (p-CCD), a simplified version of the theory limited to pair excitations that preserve the seniority of the reference determinant (i.e., the number of unpaired electrons), has mean field computational cost and is an excellent approximation to the full configuration interaction (FCI) of the paired space provided that the orbital basis defining the pairing scheme is adequately optimized. In previous work, we have shown that optimization of the pairing scheme in the seniority zero FCI leads to a very accurate description of static correlation. The same conclusion extends to p-CCD if the orbitals are optimized to make the p-CCD energy stationary. We here demonstrate these results with numerous examples. We also explore the contributions of different seniority sectors to the coupled cluster doubles (CCD) correlation energy using different orbital bases. We consider both Hartree-Fock and Brueckner orbitals, and the role of orbital localization. We show how one can pair the orbitals so that the role of the Brueckner orbitals at the CCD level is retained at the p-CCD level. Moreover, we explore ways of extending CCD to accurately describe strongly correlated systems

  19. Arterial Stiffness in Children: Pediatric Measurement and Considerations

    Science.gov (United States)

    Savant, Jonathan D.; Furth, Susan L.; Meyers, Kevin E.C.

    2014-01-01

    Background Arterial stiffness is a natural consequence of aging, accelerated in certain chronic conditions, and predictive of cardiovascular events in adults. Emerging research suggests the importance of arterial stiffness in pediatric populations. Methods There are different indices of arterial stiffness. The present manuscript focuses on carotid-femoral pulse wave velocity and pulse wave analysis, although other methodologies are discussed. Also reviewed are specific measurement considerations for pediatric populations and the literature describing arterial stiffness in children with certain chronic conditions (primary hypertension, obesity, diabetes, chronic kidney disease, hypercholesterolemia, genetic syndromes involving vasculopathy, and solid organ transplant recipients). Conclusions The measurement of arterial stiffness in children is feasible and, under controlled conditions, can give accurate information about the underlying state of the arteries. This potentially adds valuable information about the functionality of the cardiovascular system in children with a variety of chronic diseases well beyond that of the brachial artery blood pressure. PMID:26587447

  20. Estonia's Big Boys' Club / Justin Petrone

    Index Scriptorium Estoniae

    Petrone, Justin, 1979-

    2007-01-01

    Eesti üliõpilasseltside ajaloost, liikmetest ning mõjust Eesti ühiskonnale ja poliitikale. Lähemalt Eesti Üliõpilaste Seltsist (EÜS), selle tekkest, taastamisest Gorbatšovi reformide aastail, liikmeskonnast, suhetest teiste korporatsioonidega. EÜSi liikmete hulka kuulub ka president Toomas Hendrik Ilves. Ajakirjanumbri esikaanel T.H. Ilvese foto

  1. 2009-IJBCS-Article- Justin Abadassi

    African Journals Online (AJOL)

    hp

    utilized as human food, animal feed and raw ... systems, their relatively low susceptibility to ... The present work was undertaken to ... Figure 1: Principal components analysis: Biplot showing the representation of variables and .... Table 2: Population means and their standard errors for earliness variables and plant and ear.

  2. Seniors' perspectives on care: a case study of the Alex Seniors health clinic, Calgary.

    Science.gov (United States)

    Shaw, Marta; Rypien, Candace; Drummond, Neil; Harasym, Patricia; Nixon, Lara

    2015-02-25

    Primary care initiatives face an imperative to not only reduce barriers to care for their patients but also to uniquely accommodate the complex needs of at-risk patient populations. Patient-centered multidisciplinary care team models for primary care, like the Alex Seniors Clinic, are one approach for providing comprehensive care for marginalized seniors. The purpose of this qualitative study was to explore patient perspectives on the responsiveness of the Alex Seniors Clinic to their stated health needs. Themes reflected participants' perspectives on factors impacting their health needs as vulnerable seniors as well as on the measures that the Alex Seniors Clinic has taken to meet those needs. Factors impacting health included: the nature of their relationships to the physical environment in which they lived, the nature of the relationships they had to others in that environment, and independence and autonomy. Participants identified accessibility, respect and support, and advocacy as the ways in which the clinic was working to address those health needs. While respect and support, as well as advocacy, effectively addressed some patient needs, participants felt that accessibility problems continue to be health-related barriers for clinic patients. This may be due to the fact that issues of accessibility reflect larger community and social problems. Nevertheless, it is only through engaging the patient community for input on clinic approaches that an understanding can be gained of how closely a clinic's care goals are currently aligning with patient perspectives of the care and services they receive.

  3. Experimental Challenges to Stiffness as a Transport Paradigm

    Science.gov (United States)

    Luce, T. C.

    2017-10-01

    Transport in plasmas is treated experimentally as a relationship between gradients and fluxes in analogy to the random-walk problem. Gyrokinetic models often predict strong increases in local flux for small increases in local gradient when above a threshold, holding all other parameters fixed. This has been named `stiffness'. The radial scalelength is then expected to vary little with source strength as a result of high stiffness. To probe the role of ExB shearing on stiffness in the DIII-D tokamak, two neutral beam injection power scans in H-mode plasmas were specially crafted-one with constant, low torque and one with increasing torque. The ion heat, electron heat, and ion toroidal momentum transport do not show expected signatures of stiffness, while the ion particle transport does. The ion heat transport shows the clearest discrepancy; the normalized heat flux drops with increasing inverse ion temperature scalelength. ExB shearing affects the transport magnitude, but not the scalelength dependence. Linear gyrofluid (TGLF) and nonlinear gyrokinetic (GYRO) predictions show stiff ion heat transport around the experimental profiles. The ion temperature gradient required to match the ion heat flux with increasing auxiliary power is not correctly described by TGLF, even when parameters are varied within the experimental uncertainties. TGLF also underpredicts transport at smaller radii, but overpredicts transport at larger radii. Independent of the theory/experiment comparison, it is not clear that the theoretical definition of stiffness yields any prediction about parameter scans such as the power scans here, because the quantities that must be held fixed to quantify stiffness are varied. A survey of recent literature indicated that profile resilience is routinely attributed to stiffness, but simple model calculations show profile resilience does not imply stiffness. Taken together, these observations challenge the use of local stiffness as a paradigm for explaining

  4. Efficient Method for Calculating the Composite Stiffness of Parabolic Leaf Springs with Variable Stiffness for Vehicle Rear Suspension

    Directory of Open Access Journals (Sweden)

    Wen-ku Shi

    2016-01-01

    Full Text Available The composite stiffness of parabolic leaf springs with variable stiffness is difficult to calculate using traditional integral equations. Numerical integration or FEA may be used but will require computer-aided software and long calculation times. An efficient method for calculating the composite stiffness of parabolic leaf springs with variable stiffness is developed and evaluated to reduce the complexity of calculation and shorten the calculation time. A simplified model for double-leaf springs with variable stiffness is built, and a composite stiffness calculation method for the model is derived using displacement superposition and material deformation continuity. The proposed method can be applied on triple-leaf and multileaf springs. The accuracy of the calculation method is verified by the rig test and FEA analysis. Finally, several parameters that should be considered during the design process of springs are discussed. The rig test and FEA analytical results indicate that the calculated results are acceptable. The proposed method can provide guidance for the design and production of parabolic leaf springs with variable stiffness. The composite stiffness of the leaf spring can be calculated quickly and accurately when the basic parameters of the leaf spring are known.

  5. The Comparative Analysis of Senior and Non-Senior Package Holiday Travelers' Tourism Product Preferences

    Directory of Open Access Journals (Sweden)

    Maria Johann

    2015-10-01

    Full Text Available Tourism products are systemic products which offer multiple value to tourists in multiple aspects to satisfy their needs, however, tourists' preferences vary in terms of travelers' characteristics. The current study attempts to analyse senior and non-senior package holiday travelers' preferences with respect to tourism product attributes. The surveyed sample of 463 tourists spent their holiday on the coach tours in Poland in 2013. The main implication of this research for tourism product managers is that they have to focus on providing tourists with well suited packages and position appropriately by selecting suitable communication strategies for selected target segments.

  6. Real-Time Vision-Based Stiffness Mapping †.

    Science.gov (United States)

    Faragasso, Angela; Bimbo, João; Stilli, Agostino; Wurdemann, Helge Arne; Althoefer, Kaspar; Asama, Hajime

    2018-04-26

    This paper presents new findings concerning a hand-held stiffness probe for the medical diagnosis of abnormalities during palpation of soft-tissue. Palpation is recognized by the medical community as an essential and low-cost method to detect and diagnose disease in soft-tissue. However, differences are often subtle and clinicians need to train for many years before they can conduct a reliable diagnosis. The probe presented here fills this gap providing a means to easily obtain stiffness values of soft tissue during a palpation procedure. Our stiffness sensor is equipped with a multi degree of freedom (DoF) Aurora magnetic tracker, allowing us to track and record the 3D position of the probe whilst examining a tissue area, and generate a 3D stiffness map in real-time. The stiffness probe was integrated in a robotic arm and tested in an artificial environment representing a good model of soft tissue organs; the results show that the sensor can accurately measure and map the stiffness of a silicon phantom embedded with areas of varying stiffness.

  7. Real-Time Vision-Based Stiffness Mapping †

    Directory of Open Access Journals (Sweden)

    Angela Faragasso

    2018-04-01

    Full Text Available This paper presents new findings concerning a hand-held stiffness probe for the medical diagnosis of abnormalities during palpation of soft-tissue. Palpation is recognized by the medical community as an essential and low-cost method to detect and diagnose disease in soft-tissue. However, differences are often subtle and clinicians need to train for many years before they can conduct a reliable diagnosis. The probe presented here fills this gap providing a means to easily obtain stiffness values of soft tissue during a palpation procedure. Our stiffness sensor is equipped with a multi degree of freedom (DoF Aurora magnetic tracker, allowing us to track and record the 3D position of the probe whilst examining a tissue area, and generate a 3D stiffness map in real-time. The stiffness probe was integrated in a robotic arm and tested in an artificial environment representing a good model of soft tissue organs; the results show that the sensor can accurately measure and map the stiffness of a silicon phantom embedded with areas of varying stiffness.

  8. Martial arts training attenuates arterial stiffness in middle aged adults.

    Science.gov (United States)

    Douris, Peter C; Ingenito, Teresa; Piccirillo, Barbara; Herbst, Meredith; Petrizzo, John; Cherian, Vincen; McCutchan, Christopher; Burke, Caitlin; Stamatinos, George; Jung, Min-Kyung

    2013-09-01

    Arterial stiffness increases with age and is related to an increased risk of coronary artery disease. Poor trunk flexibility has been shown to be associated with arterial stiffness in middle-aged subjects. The purpose of our research study was to measure arterial stiffness and flexibility in healthy middle-aged martial artists compared to age and gender matched healthy sedentary controls. Ten martial artists (54.0 ± 2.0 years), who practice Soo Bahk Do (SBD), a Korean martial art, and ten sedentary subjects (54.7 ± 1.8 years) for a total of twenty subjects took part in this cross-sectional study. Arterial stiffness was assessed in all subjects using pulse wave velocity (PWV), a recognized index of arterial stiffness. Flexibility of the trunk and hamstring were also measured. The independent variables were the martial artists and matched sedentary controls. The dependent variables were PWV and flexibility. There were significant differences, between the SBD practitioners and sedentary controls, in PWV (P = 0.004), in trunk flexibility (P= 0.002), and in hamstring length (P= 0.003). The middle-aged martial artists were more flexible in their trunk and hamstrings and had less arterial stiffness compared to the healthy sedentary controls. The flexibility component of martial art training or flexibility exercises in general may be considered as a possible intervention to reduce the effects of aging on arterial stiffness.

  9. Determination of Ankle and Metatarsophalangeal Stiffness During Walking and Jogging.

    Science.gov (United States)

    Mager, Fabian; Richards, Jim; Hennies, Malika; Dötzel, Eugen; Chohan, Ambreen; Mbuli, Alex; Capanni, Felix

    2018-05-29

    Forefoot stiffness has been shown to influence joint biomechanics. However, little or no data exists on metatarsophalangeal stiffness. Twenty-four healthy rearfoot strike runners were recruited from a staff and student population at the University of Central Lancashire. Five repetitions of shod, self-selected speed level walking and jogging were performed. Kinetic and kinematic data were collected using retro-reflective markers placed on the lower limb and foot, to create a three-segment foot model using the Calibrated Anatomical System Technique. Ankle and metatarsophalangeal moments and angles were calculated. Stiffness values were calculated using a linear best fit line of moment versus of angle plots. Paired t-tests were used to compare values between walking and jogging conditions. Significant differences were seen in ankle range of motion (ROM), but not in metatarsophalangeal ROM. Maximum moments were significantly greater in the ankle during jogging, but these were not significantly different at the metatarsophalangeal joint. Average ankle joint stiffness exhibited significantly lower stiffness when walking compared to jogging. However, the metatarsophalangeal joint exhibited significantly greater stiffness when walking compared to jogging. A greater understanding of forefoot stiffness may inform the development of footwear, prosthetic feet and orthotic devices, such as ankle-foot orthoses for walking and sporting activities.

  10. Simvastatin Ameliorates Matrix Stiffness-Mediated Endothelial Monolayer Disruption.

    Directory of Open Access Journals (Sweden)

    Marsha C Lampi

    Full Text Available Arterial stiffening accompanies both aging and atherosclerosis, and age-related stiffening of the arterial intima increases RhoA activity and cell contractility contributing to increased endothelium permeability. Notably, statins are 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA reductase inhibitors whose pleiotropic effects include disrupting small GTPase activity; therefore, we hypothesized the statin simvastatin could be used to attenuate RhoA activity and inhibit the deleterious effects of increased age-related matrix stiffness on endothelial barrier function. Using polyacrylamide gels with stiffnesses of 2.5, 5, and 10 kPa to mimic the physiological stiffness of young and aged arteries, endothelial cells were grown to confluence and treated with simvastatin. Our data indicate that RhoA and phosphorylated myosin light chain activity increase with matrix stiffness but are attenuated when treated with the statin. Increases in cell contractility, cell-cell junction size, and indirect measurements of intercellular tension that increase with matrix stiffness, and are correlated with matrix stiffness-dependent increases in monolayer permeability, also decrease with statin treatment. Furthermore, we report that simvastatin increases activated Rac1 levels that contribute to endothelial barrier enhancing cytoskeletal reorganization. Simvastatin, which is prescribed clinically due to its ability to lower cholesterol, alters the endothelial cell response to increased matrix stiffness to restore endothelial monolayer barrier function, and therefore, presents a possible therapeutic intervention to prevent atherogenesis initiated by age-related arterial stiffening.

  11. Subspace methods for identification of human ankle joint stiffness.

    Science.gov (United States)

    Zhao, Y; Westwick, D T; Kearney, R E

    2011-11-01

    Joint stiffness, the dynamic relationship between the angular position of a joint and the torque acting about it, describes the dynamic, mechanical behavior of a joint during posture and movement. Joint stiffness arises from both intrinsic and reflex mechanisms, but the torques due to these mechanisms cannot be measured separately experimentally, since they appear and change together. Therefore, the direct estimation of the intrinsic and reflex stiffnesses is difficult. In this paper, we present a new, two-step procedure to estimate the intrinsic and reflex components of ankle stiffness. In the first step, a discrete-time, subspace-based method is used to estimate a state-space model for overall stiffness from the measured overall torque and then predict the intrinsic and reflex torques. In the second step, continuous-time models for the intrinsic and reflex stiffnesses are estimated from the predicted intrinsic and reflex torques. Simulations and experimental results demonstrate that the algorithm estimates the intrinsic and reflex stiffnesses accurately. The new subspace-based algorithm has three advantages over previous algorithms: 1) It does not require iteration, and therefore, will always converge to an optimal solution; 2) it provides better estimates for data with high noise or short sample lengths; and 3) it provides much more accurate results for data acquired under the closed-loop conditions, that prevail when subjects interact with compliant loads.

  12. STIFFNESS MODIFICATION OF COTTON IN CHITOSAN TREATMENT

    Directory of Open Access Journals (Sweden)

    CAMPOS Juan

    2017-05-01

    Full Text Available Chitosan is a biopolymer obtained from chitin, and among their most important aspects highlights its applications in a lot of industrial sectors due to its intrinsic properties, especially in the textile sector. In the last years, chitosan is widely used in the cotton and wool finishing processes due to its bond between them and its properties as an antifungical and antimicrobial properties. In this paper three different molecular weight chitosan are used in the finishing process of cotton to evaluate its influence in the surface properties modification. In order to evaluate the effect of the treatment with chitosan, flexural stiffness test is performed in warp and weft direction, and then the total value is calculated. The cotton fabric is treated with 5 g/L of different types of chitosan in an impregnation bath. This study shows the extent of surface properties modification of the cotton provided by three types of chitosan treatment. The results show that all types of chitosan modify the cotton flexural rigidity properties but the one which modifies it in a relevant manner is chitosan originated from shrimps. Chitosan, textile, flexural stiffnes, chitin, cotton.

  13. Biomechanical constraints on the feedforward regulation of endpoint stiffness.

    Science.gov (United States)

    Hu, Xiao; Murray, Wendy M; Perreault, Eric J

    2012-10-01

    Although many daily tasks tend to destabilize arm posture, it is still possible to have stable interactions with the environment by regulating the multijoint mechanics of the arm in a task-appropriate manner. For postural tasks, this regulation involves the appropriate control of endpoint stiffness, which represents the stiffness of the arm at the hand. Although experimental studies have been used to evaluate endpoint stiffness control, including the orientation of maximal stiffness, the underlying neural strategies remain unknown. Specifically, the relative importance of feedforward and feedback mechanisms has yet to be determined due to the difficulty separately identifying the contributions of these mechanisms in human experiments. This study used a previously validated three-dimensional musculoskeletal model of the arm to quantify the degree to which the orientation of maximal endpoint stiffness could be changed using only steady-state muscle activations, used to represent feedforward motor commands. Our hypothesis was that the feedforward control of endpoint stiffness orientation would be significantly constrained by the biomechanical properties of the musculoskeletal system. Our results supported this hypothesis, demonstrating substantial biomechanical constraints on the ability to regulate endpoint stiffness throughout the workspace. The ability to regulate stiffness orientation was further constrained by additional task requirements, such as the need to support the arm against gravity or exert forces on the environment. Together, these results bound the degree to which slowly varying feedforward motor commands can be used to regulate the orientation of maximum arm stiffness and provide a context for better understanding conditions in which feedback control may be needed.

  14. Toxoplasma gondii impairs memory in infected seniors.

    Science.gov (United States)

    Gajewski, Patrick D; Falkenstein, Michael; Hengstler, Jan G; Golka, Klaus

    2014-02-01

    Almost 30% of humans present a Toxoplasma gondii positive antibody status and its prevalence increases with age. The central nervous system is the main target. However, little is known about the influence of asymptomatic i.e. latent Toxoplasmosis on cognitive functions in humans. To investigate neurocognitive dysfunctions in asymptomatic older adults with T. gondii positive antibody status a double-blinded neuropsychological study was conducted. The participants were classified from a population-based sample (N=131) of healthy participants with an age of 65 years and older into two groups with 42 individuals each: Toxoplasmosis positive (T-pos; IgG>50 IU/ml) and Toxoplasmosis negative (T-neg; IgG=0 IU/ml). The outcome measures were a computer-based working-memory test (2-back) and several standardized psychometric tests of memory and executive cognitive functions. T-pos seniors showed an impairment of different aspects of memory. The rate of correctly detected target symbols in a 2-back task was decreased by nearly 9% (P=0.020), corresponding to a performance reduction of about 35% in working memory relative to the T-neg group. Moreover, T-pos seniors had a lower performance in a verbal memory test, both regarding immediate recall (10% reduction; P=0.022), delayed recognition (6%; P=0.037) and recall from long-term memory assessed by the word fluency tests (12%; P=0.029). In contrast, executive functions were not affected. The effects remained mostly unchanged after controlling for medication. The impairment of memory functions in T-pos seniors was accompanied by a decreased self-reported quality of life. Because of the high prevalence of asymptomatic Toxoplasmosis and an increasing population of older adults this finding is of high relevance for public health. Copyright © 2013 Elsevier Inc. All rights reserved.

  15. Hormones and arterial stiffness in patients with chronic kidney disease.

    Science.gov (United States)

    Gungor, Ozkan; Kircelli, Fatih; Voroneanu, Luminita; Covic, Adrian; Ok, Ercan

    2013-01-01

    Cardiovascular disease constitutes the major cause of mortality in patients with chronic kidney disease. Arterial stiffness is an important contributor to the occurrence and progression of cardiovascular disease. Various risk factors, including altered hormone levels, have been suggested to be associated with arterial stiffness. Based on the background that chronic kidney disease predisposes individuals to a wide range of hormonal changes, we herein review the available data on the association between arterial stiffness and hormones in patients with chronic kidney disease and summarize the data for the general population.

  16. Superfluid phase stiffness in electron doped superconducting Gd-123

    Science.gov (United States)

    Das, P.; Ghosh, Ajay Kumar

    2018-05-01

    Current-voltage characteristics of Ce substituted Gd-123 superconductor exhibits nonlinearity below a certain temperature below the critical temperature. An exponent is extracted using the nonlinearity of current-voltage relation. Superfluid phase stiffness has been studied as a function of temperature following the Ambegaokar-Halperin-Nelson-Siggia (AHNS) theory. Phase stiffness of the superfluid below the superconducting transition is found to be sensitive to the change in the carrier concentration in superconducting system. There may be a crucial electron density which affects superfluid stiffness strongly. Electron doping is found to be effective even if the coupling of the superconducting planes is changed.

  17. Facebook & Twitter for seniors for dummies

    CERN Document Server

    Collier, Marsha

    2014-01-01

    New to social media? This easy-to-use guide will get you started in no time! Social media is a ton of fun, and this updated guide makes it easy to set up a Facebook or Twitter account to catch up with old friends, communicate with your family, and enjoy your online experience. You'll get hands-on guidance to connecting to the Internet with a computer or mobile device, creating social media accounts and profiles, searching for friends, joining groups, sharing photos and videos, and more. If you're one of the 100+ million seniors using Facebook or other social media sites, this 2nd Edition of Fa

  18. The Hartree-Fock seniority method and its foundation

    International Nuclear Information System (INIS)

    Gomez, J.M.G.; Prieto, C.

    1987-01-01

    The seniority scheme is discussed in the framewok of quasi-spin formalism. It is shown that the ground-state wave function of the seniority scheme can be determined self-consistently from a set of Hartree-Fock seniority equations derived from the variational prinicple. The method takes into account the mean-field and the pairing correlations in nuclei at the same time. Angular momentum and particle number are exactly conserved. (author)

  19. INNOVATIVE USE OF THE POTENTIAL OF CONTEMPORARY SENIORS

    OpenAIRE

    Urlińska, Magdalena

    2016-01-01

    Attitude to old age varies depending on the cultural context - historical, like changing the public perception of the elderly and attitude to senior age. Since the 60s of the twentieth century in sociology is functioning the concept of ageism, describing the phenomenon of discrimination against older people because of their age. It manifests itself in a dismissive ratio deficits on offer for seniors or problems in the labor market. Social stigmatization of seniors has a direct impact on their...

  20. Senior Aids for Senior Readers; A Visual Aids Pamphlet for the Elderly.

    Science.gov (United States)

    Houston Public Library, TX.

    A pamphlet on special aids for senior library users lists items available from the Houston Public Library. Magnifiers (some illuminated), bedspecs (prism glasses), book holders, large print telephone dials, and games suitable for the visually handicapped or bedridden are described. The library's collections of slides and films, both 8mm and 16mm,…

  1. The Free Senior High Policy: An Appropriate Replacement to the Progressive Free Senior High Policy

    Science.gov (United States)

    Abdul-Rahaman, Nurudeen; Rahaman, Abdul Basit Abdul; Ming, Wan; Ahmed, Abdul-Rahim; Salma, Abdul-Rahaman S.

    2018-01-01

    Governments all over the world have been improving their educational sector through funding programs aimed at reducing the financial burden on parents, increasing access and quality to education. The government of Ghana in 2017 switched policy to a free senior high school policy to reduce poverty by finally eliminating the financial burdens…

  2. Nurse as a support of long - term hospitalized senior

    OpenAIRE

    TUŠLOVÁ, Michaela

    2017-01-01

    This thesis "Nurse as a support of long-term hospitalized senior" is divided into a theoretical and an empirical part. It deals with the issue of long-term hospitalization of seniors at the aftercare department, especially with the nurses' support to seniors and their interrelationships. Three main goals were appointed. It was examined how the seniors perceive nurses who takes care of them. Then in which areas nurses are supportive and which techniques they try to use to be a support for seni...

  3. Negative stiffness honeycombs as tunable elastic metamaterials

    Science.gov (United States)

    Goldsberry, Benjamin M.; Haberman, Michael R.

    2018-03-01

    Acoustic and elastic metamaterials are media with a subwavelength structure that behave as effective materials displaying atypical effective dynamic properties. These material systems are of interest because the design of their sub-wavelength structure allows for direct control of macroscopic wave dispersion. One major design limitation of most metamaterial structures is that the dynamic response cannot be altered once the microstructure is manufactured. However, the ability to modify wave propagation in the metamaterial with an external stimulus is highly desirable for numerous applications and therefore remains a significant challenge in elastic metamaterials research. In this work, a honeycomb structure composed of a doubly periodic array of curved beams, known as a negative stiffness honeycomb (NSH), is analyzed as a tunable elastic metamaterial. The nonlinear static elastic response that results from large deformations of the NSH unit cell leads to a large variation in linear elastic wave dispersion associated with infinitesimal motion superposed on the externally imposed pre-strain. A finite element model is utilized to model the static deformation and subsequent linear wave motion at the pre-strained state. Analysis of the slowness surface and group velocity demonstrates that the NSH exhibits significant tunability and a high degree of anisotropy which can be used to guide wave energy depending on static pre-strain levels. In addition, it is shown that partial band gaps exist where only longitudinal waves propagate. The NSH therefore behaves as a meta-fluid, or pentamode metamaterial, which may be of use for applications of transformation elastodynamics such as cloaking and gradient index lens devices.

  4. Spectral distributions of mixed configurations of identical nucleons in the seniority scheme II. Configuration-seniority scheme

    International Nuclear Information System (INIS)

    Quesne, C.; Spitz, S.

    1978-01-01

    Configuration-seniority spectral distributions as well as fixed seniority and fixed total seniority and parity distributions are studied in detail for mixed configurations of identitical nucleons. The decomposition of any (1+2) -body Hamiltonian into irreducible tensors with respect to the unitary and symplectic groups in each subshell is obtained. Group theoretical methods based on the Wigner-Eckart theorem for the higher unitary groups are used to get analytical expressions for the partial widths of configuration-seniority distributions. During this derivation, various isoscalar factors for the chain SU (2Ω) is contained inSp (2Ω) are determined. Numerical calculations of centroid energies, partial widths, and mixing parameters are performed in the Sn and Pb nuclei with a surface delta and a gaussian interactions. Average ordinary and total seniority breaking is studied. Total seniority space truncations in the ground state region are discussed in the Pb nuclei in connections with various approximation schemes

  5. What do seniors remember from freshman physics?

    Directory of Open Access Journals (Sweden)

    Andrew Pawl

    2012-12-01

    Full Text Available We have given a group of 56 Massachusetts Institute of Technology (MIT seniors who took mechanics as freshmen a written test similar to the final exam they took in their freshman course as well as the Mechanics Baseline Test (MBT and the Colorado Learning Attitudes about Science Survey (CLASS. Students in majors unrelated to physics scored 60% lower on the written analytic part of the final than they would have as freshmen. The mean score of all participants on the MBT was insignificantly changed from their average on the posttest they took as freshmen. However, the students’ performance on 9 of the 26 MBT items (with 6 of the 9 involving graphical kinematics represents a gain over their freshman posttest score (a normalized gain of about 70%, while their performance on the remaining 17 questions is best characterized as a loss of approximately 50% of the material learned in the freshman course. On multiple-choice questions covering advanced physics concepts, the mean score of the participants was about 50% lower than the average performance of freshmen. Although attitudinal survey results indicate that almost half the seniors feel the specific mechanics course content is unlikely to be useful to them, a significant majority (75%–85% feel that physics does teach valuable problem solving skills, and an overwhelming majority believe that mechanics should remain a required course at MIT.

  6. Professional determination problems of modern senior pupils

    Directory of Open Access Journals (Sweden)

    G.N. Danylenko

    2017-03-01

    Full Text Available Background. Today, young people are more focused on getting education as such, without taking into account the profession. The relevance of this study is the identification of the level of professional self-determination of senior pupils, the mechanisms of formation of professional preferences. The article contains the concept and content of professional self-determination in adolescence; the results of the study on the formation of professional self-determination in senior pupils are presented. The study conducted among 9th grade pupils of secondary schools has revealed that the further gradual self-determination of the future specialty depends not only on psychological readiness for conscious choice. Materials and methods. The study involved 982 pupils of secondary schools in Ukraine. To study the level of formation of professional readiness, there was conducted a survey on the developed questionnaire. Statistical analysis was carried out using MS Excel and SPSS 17. Results. The results showed that professional intents of 9-graders are a key feature for solving the problem of high school selection and future careers. But for most students, these intentions are contradictory due to objective reasons. Radio, television, books don’t have a significant impact on the choice of professional self-determination. Conclusions. The conducted survey is self-sufficient for the analysis of professional orientation. But the choice of profession by the students is influenced by many factors. Therefore, carrying out the studies on vocational guidance requires an integrated approach.

  7. Career orientation of senior secondary school students

    Directory of Open Access Journals (Sweden)

    Suryadi Bambang

    2018-01-01

    Full Text Available The main purpose of this study is to portray career orientation of Senior High School (SMA and Vocational High School (SMK students and the role that school counselors should play in providing vocational guidance. This study used a survey method involving 278 students from both SMA and SMK di Jakarta. Career Orientation Inventory (COI and Counselor Role in Career Guidance Inventory were used as an instrument of data collection. Descriptive statistics and t-test were conducted to analyze the data. The findings of the study reveal that majority of SMA and SMK students wanted to further their study to university and only small number of them wanted to find out jobs or run their own business. The findings also show that school counselors play a very important role in providing vocational guidance services for senior secondary students. Therefore, in order for students to have a bright career in future, school counselors should improve the quality of vocational guidance services and plan comprehensive vocational guidance programs.

  8. A new variable stiffness suspension system: passive case

    Directory of Open Access Journals (Sweden)

    O. M. Anubi

    2013-02-01

    Full Text Available This paper presents the design, analysis, and experimental validation of the passive case of a variable stiffness suspension system. The central concept is based on a recently designed variable stiffness mechanism. It consists of a horizontal control strut and a vertical strut. The main idea is to vary the load transfer ratio by moving the location of the point of attachment of the vertical strut to the car body. This movement is controlled passively using the horizontal strut. The system is analyzed using an L2-gain analysis based on the concept of energy dissipation. The analyses, simulation, and experimental results show that the variable stiffness suspension achieves better performance than the constant stiffness counterpart. The performance criteria used are; ride comfort, characterized by the car body acceleration, suspension deflection, and road holding, characterized by tire deflection.

  9. Molecular Cues Guiding Matrix Stiffness in Liver Fibrosis

    Directory of Open Access Journals (Sweden)

    Takaoki Saneyasu

    2016-01-01

    Full Text Available Tissue and matrix stiffness affect cell properties during morphogenesis, cell growth, differentiation, and migration and are altered in the tissue remodeling following injury and the pathological progression. However, detailed molecular mechanisms underlying alterations of stiffness in vivo are still poorly understood. Recent engineering technologies have developed powerful techniques to characterize the mechanical properties of cell and matrix at nanoscale levels. Extracellular matrix (ECM influences mechanical tension and activation of pathogenic signaling during the development of chronic fibrotic diseases. In this short review, we will focus on the present knowledge of the mechanisms of how ECM stiffness is regulated during the development of liver fibrosis and the molecules involved in ECM stiffness as a potential therapeutic target for liver fibrosis.

  10. Role of flexural stiffness of leukocyte microvilli in adhesion dynamics

    Science.gov (United States)

    Wu, Tai-Hsien; Qi, Dewei

    2018-03-01

    Previous work reported that microvillus deformation has an important influence on dynamics of cell adhesion. However, the existing studies were limited to the extensional deformation of microvilli and did not consider the effects of their bending deformation on cell adhesion. This Rapid Communication investigates the effects of flexural stiffness of microvilli on the rolling process related to adhesion of leukocytes by using a lattice-Boltzmann lattice-spring method (LLM) combined with adhesive dynamics (AD) simulations. The simulation results reveal that the flexural stiffness of microvilli and their bending deformation have a profound effect on rolling velocity and adhesive forces. As the flexural stiffness of the microvilli decreases, their bending angles increase, resulting in an increase in the number of receptor-ligand bonds and adhesive bonding force and a decrease in the rolling velocity of leukocytes. The effects of flexural stiffness on deformation and adhesion represent crucial factors involved in cell adhesion.

  11. Operator-Based Preconditioning of Stiff Hyperbolic Systems

    International Nuclear Information System (INIS)

    Reynolds, Daniel R.; Samtaney, Ravi; Woodward, Carol S.

    2009-01-01

    We introduce an operator-based scheme for preconditioning stiff components encountered in implicit methods for hyperbolic systems of partial differential equations posed on regular grids. The method is based on a directional splitting of the implicit operator, followed by a characteristic decomposition of the resulting directional parts. This approach allows for solution to any number of characteristic components, from the entire system to only the fastest, stiffness-inducing waves. We apply the preconditioning method to stiff hyperbolic systems arising in magnetohydro- dynamics and gas dynamics. We then present numerical results showing that this preconditioning scheme works well on problems where the underlying stiffness results from the interaction of fast transient waves with slowly-evolving dynamics, scales well to large problem sizes and numbers of processors, and allows for additional customization based on the specific problems under study

  12. Finding trap stiffness of optical tweezers using digital filters.

    Science.gov (United States)

    Almendarez-Rangel, Pedro; Morales-Cruzado, Beatriz; Sarmiento-Gómez, Erick; Pérez-Gutiérrez, Francisco G

    2018-02-01

    Obtaining trap stiffness and calibration of the position detection system is the basis of a force measurement using optical tweezers. Both calibration quantities can be calculated using several experimental methods available in the literature. In most cases, stiffness determination and detection system calibration are performed separately, often requiring procedures in very different conditions, and thus confidence of calibration methods is not assured due to possible changes in the environment. In this work, a new method to simultaneously obtain both the detection system calibration and trap stiffness is presented. The method is based on the calculation of the power spectral density of positions through digital filters to obtain the harmonic contributions of the position signal. This method has the advantage of calculating both trap stiffness and photodetector calibration factor from the same dataset in situ. It also provides a direct method to avoid unwanted frequencies that could greatly affect calibration procedure, such as electric noise, for example.

  13. Arterial Stiffness and Functional Outcome in Acute Ischemic Stroke

    OpenAIRE

    Lee, Yeong-Bae; Park, Joo-Hwan; Kim, Eunja; Kang, Chang-Ki; Park, Hyeon-Mi

    2014-01-01

    Objective Arterial stiffness is a common change associated with aging and can be evaluated by measuring pulse wave velocity (PWV) between sites in the arterial tree, with the stiffer artery having the higher PWV. Arterial stiffness is associated with the risk of stroke in the general population and of fatal stroke in hypertensive patients. This study is to clarify whether PWV value predicts functional outcome of acute ischemic stroke. Methods One hundred patients were enrolled with a diagnosi...

  14. MINIMUM BRACING STIFFNESS FOR MULTI-COLUMN SYSTEMS: THEORY

    OpenAIRE

    ARISTIZÁBAL-OCHOA, J. DARÍO

    2011-01-01

    A method that determines the minimum bracing stiffness required by a multi-column elastic system to achieve non-sway buckling conditions is proposed. Equations that evaluate the required minimum stiffness of the lateral and torsional bracings and the corresponding “braced" critical buckling load for each column of the story level are derived using the modified stability functions. The following effects are included: 1) the types of end connections (rigid, semirigid, and simple); 2) the bluepr...

  15. Potential Relationship between Passive Plantar Flexor Stiffness and Running Performance.

    Science.gov (United States)

    Ueno, Hiromasa; Suga, Tadashi; Takao, Kenji; Tanaka, Takahiro; Misaki, Jun; Miyake, Yuto; Nagano, Akinori; Isaka, Tadao

    2018-02-01

    The present study aimed to determine the relationship between passive stiffness of the plantar flexors and running performance in endurance runners. Forty-eight well-trained male endurance runners and 24 untrained male control subjects participated in this study. Plantar flexor stiffness during passive dorsiflexion was calculated from the slope of the linear portion of the torque-angle curve. Of the endurance runners included in the present study, running economy in 28 endurance runners was evaluated by measuring energy cost during three 4-min trials (14, 16, and 18 km/h) of submaximal treadmill running. Passive stiffness of the plantar flexors was significantly higher in endurance runners than in untrained subjects. Moreover, passive plantar flexor stiffness in endurance runners was significantly correlated with a personal best 5000-m race time. Furthermore, passive plantar flexor stiffness in endurance runners was significantly correlated with energy cost during submaximal running at 16 km/h and 18 km/h, and a trend towards such significance was observed at 14 km/h. The present findings suggest that stiffer plantar flexors may help achieve better running performance, with greater running economy, in endurance runners. Therefore, in the clinical setting, passive stiffness of the plantar flexors may be a potential parameter for assessing running performance. © Georg Thieme Verlag KG Stuttgart · New York.

  16. Association of Parental Hypertension With Arterial Stiffness in Nonhypertensive Offspring

    DEFF Research Database (Denmark)

    Andersson, Charlotte; Quiroz, Rene; Enserro, Danielle

    2016-01-01

    High arterial stiffness seems to be causally involved in the pathogenesis of hypertension. We tested the hypothesis that offspring of parents with hypertension may display higher arterial stiffness before clinically manifest hypertension, given that hypertension is a heritable condition. We compa......, in this community-based sample of young, nonhypertensive adults, we observed greater arterial stiffness in offspring of parents with hypertension. These observations are consistent with higher vascular stiffness at an early stage in the pathogenesis of hypertension.......High arterial stiffness seems to be causally involved in the pathogenesis of hypertension. We tested the hypothesis that offspring of parents with hypertension may display higher arterial stiffness before clinically manifest hypertension, given that hypertension is a heritable condition. We...... compared arterial tonometry measures in a sample of 1564 nonhypertensive Framingham Heart Study third-generation cohort participants (mean age: 38 years; 55% women) whose parents were enrolled in the Framingham Offspring Study. A total of 468, 715, and 381 participants had 0 (referent), 1, and 2 parents...

  17. A multiwell platform for studying stiffness-dependent cell biology.

    Science.gov (United States)

    Mih, Justin D; Sharif, Asma S; Liu, Fei; Marinkovic, Aleksandar; Symer, Matthew M; Tschumperlin, Daniel J

    2011-01-01

    Adherent cells are typically cultured on rigid substrates that are orders of magnitude stiffer than their tissue of origin. Here, we describe a method to rapidly fabricate 96 and 384 well platforms for routine screening of cells in tissue-relevant stiffness contexts. Briefly, polyacrylamide (PA) hydrogels are cast in glass-bottom plates, functionalized with collagen, and sterilized for cell culture. The Young's modulus of each substrate can be specified from 0.3 to 55 kPa, with collagen surface density held constant over the stiffness range. Using automated fluorescence microscopy, we captured the morphological variations of 7 cell types cultured across a physiological range of stiffness within a 384 well plate. We performed assays of cell number, proliferation, and apoptosis in 96 wells and resolved distinct profiles of cell growth as a function of stiffness among primary and immortalized cell lines. We found that the stiffness-dependent growth of normal human lung fibroblasts is largely invariant with collagen density, and that differences in their accumulation are amplified by increasing serum concentration. Further, we performed a screen of 18 bioactive small molecules and identified compounds with enhanced or reduced effects on soft versus rigid substrates, including blebbistatin, which abolished the suppression of lung fibroblast growth at 1 kPa. The ability to deploy PA gels in multiwell plates for high throughput analysis of cells in tissue-relevant environments opens new opportunities for the discovery of cellular responses that operate in specific stiffness regimes.

  18. A multiwell platform for studying stiffness-dependent cell biology.

    Directory of Open Access Journals (Sweden)

    Justin D Mih

    Full Text Available Adherent cells are typically cultured on rigid substrates that are orders of magnitude stiffer than their tissue of origin. Here, we describe a method to rapidly fabricate 96 and 384 well platforms for routine screening of cells in tissue-relevant stiffness contexts. Briefly, polyacrylamide (PA hydrogels are cast in glass-bottom plates, functionalized with collagen, and sterilized for cell culture. The Young's modulus of each substrate can be specified from 0.3 to 55 kPa, with collagen surface density held constant over the stiffness range. Using automated fluorescence microscopy, we captured the morphological variations of 7 cell types cultured across a physiological range of stiffness within a 384 well plate. We performed assays of cell number, proliferation, and apoptosis in 96 wells and resolved distinct profiles of cell growth as a function of stiffness among primary and immortalized cell lines. We found that the stiffness-dependent growth of normal human lung fibroblasts is largely invariant with collagen density, and that differences in their accumulation are amplified by increasing serum concentration. Further, we performed a screen of 18 bioactive small molecules and identified compounds with enhanced or reduced effects on soft versus rigid substrates, including blebbistatin, which abolished the suppression of lung fibroblast growth at 1 kPa. The ability to deploy PA gels in multiwell plates for high throughput analysis of cells in tissue-relevant environments opens new opportunities for the discovery of cellular responses that operate in specific stiffness regimes.

  19. Rotational and peak torque stiffness of rugby shoes.

    Science.gov (United States)

    Ballal, Moez S; Usuelli, Federico Giuseppe; Montrasio, Umberto Alfieri; Molloy, Andy; La Barbera, Luigi; Villa, Tomaso; Banfi, Giuseppe

    2014-09-01

    Sports people always strive to avoid injury. Sports shoe designs in many sports have been shown to affect traction and injury rates. The aim of this study is to demonstrate the differing stiffness and torque in rugby boots that are designed for the same effect. Five different types of rugby shoes commonly worn by scrum forwards were laboratory tested for rotational stiffness and peak torque on a natural playing surface generating force patterns that would be consistent with a rugby scrum. The overall internal rotation peak torque was 57.75±6.26 Nm while that of external rotation was 56.55±4.36 Nm. The Peak internal and external rotational stiffness were 0.696±0.1 and 0.708±0.06 Nm/deg respectively. Our results, when compared to rotational stiffness and peak torques of football shoes published in the literature, show that shoes worn by rugby players exert higher rotational and peak torque stiffness compared to football shoes when tested on the same natural surfaces. There was significant difference between the tested rugby shoes brands. In our opinion, to maximize potential performance and lower the potential of non-contact injury, care should be taken in choosing boots with stiffness appropriate to the players main playing role. Copyright © 2014 Elsevier Ltd. All rights reserved.

  20. Sex Differences in Limb and Joint Stiffness in Recreational Runners

    Directory of Open Access Journals (Sweden)

    Sinclair Jonathan

    2015-09-01

    Full Text Available Purpose. Female runners are known to be at greater risk from chronic running injuries than age-matched males, although the exact mechanisms are often poorly understood. The aim of the current investigation was to determine if female recreational runners exhibit distinct limb and joint stiffness characteristics in relation to their male counterparts. Methods. Fourteen male and fourteen female runners ran over a force platform at 4.0 m · s-1. Lower limb kinematics were collected using an eight-camera optoelectric motion capture system operating at 250 Hz. Measures of limb and joint stiffness were calculated as a function of limb length and joint moments divided by the extent of limb and joint excursion. All stiffness and joint moment parameters were normalized to body mass. Sex differences in normalized limb and knee and ankle joint stiffness were examined statistically using independent samples t tests. Results. The results indicate that normalized limb (male = 0.18 ± 0.07, female = 0.37 ± 0.10 kN · kg · m-1 and knee stiffness (male = 5.59 ± 2.02, female = 7.34 ± 1.78 Nm · kg · rad-1 were significantly greater in female runners. Conclusions. On the basis that normalized knee and limb stiffness were shown to be significantly greater in female runners, the findings from the current investigation may provide further insight into the aetiology of the distinct injury patterns observed between sexes.

  1. Evaluation of arterial stiffness in nondiabetic chronic kidney disease patients

    Directory of Open Access Journals (Sweden)

    Bodanapu Mastanvalli

    2017-01-01

    Full Text Available Chronic kidney disease (CKD is a growing problem worldwide. Clinical and epidemiologic studies have shown that structural and functional changes that occur in major arteries are a major contributing factor to the high mortality in uremic patients. Recent studies have shown a stepwise increase of the carotid-femoral pulse wave velocity (cfPWV from CKD Stage 1 to Stage 5. We evaluated the cfPWV and augmentation index (AIx, as indirect markers of arterial stiffness in patients with nondiabetic CKD and compared the values with normal population; we also evaluated the relationship between various stages of CKD and arterial stiffness markers. This cross-sectional study was carried out in the Department of Nephrology for a duration of two years from January 15, 2012, to January 14, 2014. Fifty patients with nondiabetic CKD were studied along with 50 healthy volunteers who did not have CKD, who served as controls. Assessment of arterial stiffness (blood pressure, PWV, heart rate, aortic augmentation pressure, and AIx was performed using the PeriScope device. PWV positively correlated with systolic and diastolic blood pressure, mean aortic arterial pressure, serum creatinine, and serum uric acid and negatively correlated with estimated glomerular filtration rate. Arterial stiffness increased as CKD stage increased and was higher in nondiabetic CKD group than in the general population. Arterial stiffness progressed gradually from CKD Stage 2 to 5, and then abruptly, in dialysis patients. Measures to decrease the arterial stiffness and its influence on decreasing cardiovascular events need further evaluation.

  2. Acceptance in the domestic environment: the experience of senior housing for lesbian, gay, bisexual, and transgender seniors.

    Science.gov (United States)

    Sullivan, Kathleen M

    2014-01-01

    The social environment impacts the ability of older adults to interact successfully with their community and age-in-place. This study asked, for the first time, residents of existing Lesbian, Gay, Bisexual, and Transgender (LGBT) senior living communities to explain why they chose to live in those communities and what, if any, benefit the community afforded them. Focus groups were conducted at 3 retirement communities. Analysis found common categories across focus groups that explain the phenomenon of LGBT senior housing. Acceptance is paramount for LGBT seniors and social networks expanded, contrary to socioemotional selectivity theory. Providers are encouraged to develop safe spaces for LGBT seniors.

  3. Hydration Status Is Associated with Aortic Stiffness, but Not with Peripheral Arterial Stiffness, in Chronically Hemodialysed Patients

    Directory of Open Access Journals (Sweden)

    Daniel Bia

    2015-01-01

    Full Text Available Background. Adequate fluid management could be essential to minimize high arterial stiffness observed in chronically hemodialyzed patients (CHP. Aim. To determine the association between body fluid status and central and peripheral arterial stiffness levels. Methods. Arterial stiffness was assessed in 65 CHP by measuring the pulse wave velocity (PWV in a central arterial pathway (carotid-femoral and in a peripheral pathway (carotid-brachial. A blood pressure-independent regional arterial stiffness index was calculated using PWV. Volume status was assessed by whole-body multiple-frequency bioimpedance. Patients were first observed as an entire group and then divided into three different fluid status-related groups: normal, overhydration, and dehydration groups. Results. Only carotid-femoral stiffness was positively associated (P<0.05 with the hydration status evaluated through extracellular/intracellular fluid, extracellular/Total Body Fluid, and absolute and relative overhydration. Conclusion. Volume status and overload are associated with central, but not peripheral, arterial stiffness levels with independence of the blood pressure level, in CHP.

  4. Senior Secondary School Children's Understanding of Plant Nutrition

    Science.gov (United States)

    Mosothwane, Modise

    2011-01-01

    The purpose of this study was to assess children's understanding of plant nutrition. The research was done on a sample of secondary school pupils in the age range of 16 to 19 years in two senior secondary schools in Botswana. The sample contained 137 senior secondary pupils all in their final year of study. These children were above average…

  5. 76 FR 61346 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2011-10-04

    ... DEPARTMENT OF DEFENSE Office of the Secretary Senior Executive Service Performance Review Board AGENCY: Department of Defense Office of Inspector General, Department of Defense (DoD). ACTION: Notice. SUMMARY: This notice announces the appointment of the members of the Senior Executive Service (SES...

  6. Burnout in College Seniors Preparing for the Human Services Professions.

    Science.gov (United States)

    Edwards, James G.

    The Maslach Burnout Inventory (MBI) was used to assess the level and intensity of burnout in 165 California State University at Long Beach college seniors preparing for the human services professions, specifically teaching, nursing, criminal justice, and social welfare. A comparison group of 80 engineering seniors was also assessed. The 40-item…

  7. Effects of learning styles on career preferences of senior secondary ...

    African Journals Online (AJOL)

    The research investigated the effects of learning styles on career preferences of senior secondary school students in Jigawa State, Nigeria. A total of six hundred students, three hundred and sixty male, and two hundred and forty female were randomly selected from ten senior secondary schools across the state for the study ...

  8. Crossing cultures: health promotion for senior migrants in the Netherlands

    NARCIS (Netherlands)

    Abma, T.A.; Heijsman, A.M.

    2015-01-01

    A health promotion programme focusing on the meaning of everyday activities was implemented and evaluated to test its usefulness for community-dwelling seniors in the Netherlands. To evaluate how senior migrants with a Surinamese-Hindustani background and professionals received the programme, and

  9. Active Life of the Senior Citizens through Education

    Science.gov (United States)

    Taziev, Saljakhutdin Fardievich

    2015-01-01

    The paper presents reasons for including the senior citizens into educational process, as well as active age model. Education, communication and leisure system for the senior citizens, implemented by Yelabuga municipal district, is presented as a requirement for model realization. A core of the paper is the Active Age Institute. Its program…

  10. Prevalence of conduct disorder among adolescents in a senior ...

    African Journals Online (AJOL)

    The study investigated the prevalence of conduct disorder among adolescents in a senior secondary school in Benin City. This was a survey study. The population was made up of 1,540 students in one of the mixed schools that was randomly selected from the senior secondary schools in Benin City, Edo State Nigeria.

  11. Chemistry teachers and their senior secondary students' answers to ...

    African Journals Online (AJOL)

    The purpose of the study was to compare chemistry teachers' answers in a question related to evaporation with that of their senior secondary students. Two hundred and seventy six senior secondary students and their seven teachers participated in the study. The main data collecting instrument was the pictorial and verbal ...

  12. Examining the Internet Addiction Levels of High School Senior Students

    Science.gov (United States)

    Aydemir, Hasan

    2018-01-01

    In the present study, the internet addiction status of high school senior students in Yesilyurt county of Malatya was analyzed and examined in terms of gender variable. The study population consisted of 3442 senior students who were studying at 37 high schools in state schools in Yesilyurt County of the city of Malatya in 2016-2017 academic year.…

  13. Seniorers frivillige arbejde i idrætten

    DEFF Research Database (Denmark)

    Ibsen, Bjarne

    2013-01-01

    Seniorers frivillige arbejde i idrætten. Hvor mange arbejder frivilligt, udviklingen deri, politiske forventninger til de frivillige mv.......Seniorers frivillige arbejde i idrætten. Hvor mange arbejder frivilligt, udviklingen deri, politiske forventninger til de frivillige mv....

  14. Configuration-seniority spectral distributions in Ni62

    International Nuclear Information System (INIS)

    Spitz, S.; Quesne, C.

    1976-01-01

    Configuration-seniority spectral distributions are used to analyse some properties of Ni 62 , and the results compared with those of shell model. The goodness of the symplectic symmetry is discussed by investigating the distributions with fixed seniority in every orbit

  15. Senior Project: Mentoring--The Art of Becoming. [Videotape].

    Science.gov (United States)

    Southeastern Regional Vision for Education (SERVE), Tallahassee, FL.

    Mentoring is an integral part of SERVE's Senior Project program. Mentors provide support and guidance to students as they complete the requirements of Senior Project by meeting with them to offer input on their research papers and assistance with the design and implementation of their projects. Approximately 100 schools in SERVE's 6-state region…

  16. Senior Faculty Careers and Personal Development: A Survey.

    Science.gov (United States)

    Armour, Robert; And Others

    A total of 1,135 senior faculty from 6 institutions of higher education responded to a questionnaire designed to determine the relationships between personal and career development for senior college faculty and the similarities and differences in satisfaction among faculty from various disciplines. Responses from the questionnaire showed that…

  17. Capital Structure and Managerial Compensation : The Effects of Renumeration Seniority

    NARCIS (Netherlands)

    Calcagno, R.; Renneboog, L.D.R.

    2004-01-01

    We show that the relative seniority of debt and managerial compensation has important implications on the design of remuneration contracts.Whereas the traditional literature assumes that debt is senior to remuneration, we show that this is frequently not the case according to bankruptcy regulation

  18. Capital Structure and Managerial Compensation: the Effects of Remuneration Seniority

    NARCIS (Netherlands)

    Calcagno, R.; Renneboog, L.

    2007-01-01

    We show that the relative seniority of debt and managerial compensation has important implications for the design of remuneration contracts. Whereas the traditional literature assumes that debt is senior to remuneration, there are in reality many cases in which remuneration contracts are de facto

  19. Phenomenological Study of Empowering Women Senior Leaders in Higher Education

    Science.gov (United States)

    Cselenszky, Mila P.

    2012-01-01

    The number of women in senior administrative and leadership roles in higher education is minimal compared to the number of women in higher education jobs in general. This phenomenological study explored pathways women took to advance in their careers and barriers that prevent more women from gaining senior administrative and leadership roles.…

  20. Increasing Leadership Capacity for Senior Women Faculty through Mutual Mentoring

    Science.gov (United States)

    List, Karen; Sorcinelli, Mary Deane

    2018-01-01

    Mentoring has long been viewed as a powerful means of enhancing the professional success and personal wellbeing of early-career faculty; however, little is known about its benefits for senior faculty. Using data from a peer mentoring community of six senior faculty women in leadership roles at a research university, this study explores the impact…

  1. A Successful Senior Seminar: Unsolved Problems in Number Theory

    Science.gov (United States)

    Styer, Robert

    2014-01-01

    The "Unsolved Problems in Number Theory" book by Richard Guy provides nice problems suitable for a typical math major. We give examples of problems that have worked well in our senior seminar course and some nice results that senior math majors can obtain.

  2. 76 FR 80902 - Senior Executive Service; Performance Review Board; Members

    Science.gov (United States)

    2011-12-27

    ... COURT SERVICES AND OFFENDER SUPERVISION AGENCY FOR THE DISTRICT OF COLUMBIA Senior Executive Service; Performance Review Board; Members AGENCY: Court Services and Offender Supervision Agency for the... agency's Senior Executive Service. The PRB established for the Court Services and Offender Supervision...

  3. Senior Centers and Policy Advocacy: Changing Public Perceptions

    Science.gov (United States)

    Pardasani, Manoj; Goldkind, Lauri

    2012-01-01

    As critical components of the aging continuum of care, senior centers promote older adult health and well-being by providing opportunities for recreation, socialization, nutrition, health education, and access to vital social services. Nationally, a vast network of 11,000 senior centers serves over four million older adults annually. As the United…

  4. Board and Senior Management Alignment on School Strategy

    Science.gov (United States)

    Sarros, James C.; Sarros, Anne M.; Cooper, Brian K.; Santora, Joseph C.; Baker, Robin

    2016-01-01

    This study examines the degree to which senior executive members of a school's decision-making team (senior management team and board of directors) are aligned on fundamental principles of school strategy. Our study is based on a conceptual framework of strategic leadership as it applies in an Australian independent school context. We also examine…

  5. Occupational stress among senior police officers.

    Science.gov (United States)

    Brown, J; Cooper, C; Kirkcaldy, B

    1996-02-01

    From a survey of over 500 senior UK police officers completing the occupational stress inventory, it was observed that those serving in England and Wales exhibited the highest job stress related to structure and climate, co-worker relationships and their managerial role. There were no inter-regional differences on the individual difference variables, Type A behaviour, locus of control, or on physical health measures. Superintendents in Scotland used coping methods least frequently including domestic/home support, time management and social support, the latter strategy being most used by Northern Ireland officers. Findings relating job stress to job satisfaction were inconsistent with other police populations. Results are discussed in the context of organizational reform in the police service.

  6. Generalized seniority breaking in semimagic nuclei

    International Nuclear Information System (INIS)

    Bonsignori, G.; Savoia, M.; Allaart, K.

    1986-01-01

    The author's have described the spectra and electromagnetic properties of even semimagic nuclei in a generalized seniority (v/sub g/) scheme in a model space including up to v/sub g/=4 states. The author's conclude that ground states are for about 90% v/sub g/=0 states, 2/sub 1//sup +/ and 3/sub 1//sup -/ are for about 95% v/sub g/=2 states, while for other excited states one has in general 10-30% v/sub g/=4 admixtures is predominantly v/sub g/=2 states. Experimental evidence for these v/sub g/=4 admixtures came mainly from E2 decay and E2/M1 mixing ratios. A v/sub g/ mixing mechanism of particle-phonon coupling type may explain qualitatively the v/sub g/=4 admixtures and their effect on electromagnetic properties

  7. Senior health clinics: are they financially viable?

    Science.gov (United States)

    McAtee, Robin E; Crandall, Debra; Wright, Larry D; Beverly, Claudia J

    2009-07-01

    Are hospital-based outpatient interdisciplinary clinics a financially viable alternative for caring for our burgeoning population of older adults in America? Although highly popular, with high patient satisfaction rates among older adults and their families, senior health clinics (SHCs) can be expensive to operate, with limited quantifiable health outcomes. This study analyzed three geriatric hospital-based interdisciplinary clinics in rural Arkansas by examining their patient profiles, revenues, and expenses. It closely examined the effects of the downstream revenue using the multiplier effect and acknowledged other factors that weigh heavily on the success of SHCs and the care of older adults. The findings highlight the similarities and differences in the three clinics' operating and financial structures in addition to the clinics' and providers' productivity. The analysis presents an evidence-based illustration that SHCs can break even or lose large amounts of money.

  8. Lifestyle and Genetic Predictors of Stiffness Index in Community-dwelling Elderly Korean Men and Women.

    Science.gov (United States)

    Park, Kyung-Ae; Park, Yeon-Hwan; Suh, Min-Hee; Choi-Kwon, Smi

    2015-09-01

    Differing lifestyle, nutritional, and genetic factors may lead to a differing stiffness index (SI) determined by quantitative ultrasound in elderly men and women. The purpose of this study was to determine SI and the gender-specific factors associated with low SI in a Korean elderly cohort. This was a cross-sectional descriptive study identifying the gender-specific factors related to SI in 252 men and women aged 65 years and greater from local senior centers in Seoul, Korea between January and February 2009. The mean SI of elderly men was significantly higher than that of the women's. A multiple regression analysis reveals that age, nutritional status, and physical activity were predictive factors of lower SI in men, whereas age, alcohol consumption, educational level, and genetic polymorphism were predictive factors for elderly women. Low SI was common in both elderly men and women. We found gender differences in factors linked to low SI. In multiple regression analysis, nutritional status and physical activity were more important factors in men, whereas alcohol consumption, educational level, and genetic polymorphism were significant factors predicting low SI in women. Gender-specific modifiable risk factors associated with low SI should be considered when developing osteoporosis prevention programs for the elderly. Copyright © 2015. Published by Elsevier B.V.

  9. Why do seniors leave resistance training programs?

    Directory of Open Access Journals (Sweden)

    Burton E

    2017-03-01

    Full Text Available Elissa Burton,1 Anne-Marie Hill,1 Simone Pettigrew,2 Gill Lewin,3 Liz Bainbridge,1 Kaela Farrier,1 Phil Airey,4 Keith D Hill1 1School of Physiotherapy and Exercise Science, 2School of Psychology and Speech Pathology, 3School of Nursing, Midwifery and Paramedicine, Curtin University, 4Council on the Ageing, Perth, WA, Australia Purpose: The proportion of the population, that is older, is growing at a faster rate than other age groups. Physical activity is important for older people because it assists in living independently. Participating in resistance training on a regular basis (twice weekly is recommended for older people; yet, fewer than 15% of people over 60 years achieve this level. The aim of this article was to investigate the factors contributing to older people’s decisions to stop participation in a resistance training program.Participants and methods: Participants were older people who had chosen to participate in a structured resistance training program specifically designed for seniors and then after a period of time discontinued. This population received a questionnaire in the mail focused on factors contributing to their cessation of resistance training exercise. Qualitative results were analyzed using inductive content analysis.Results: Fifty-six survey responses were received (average age 71.5 years, SD =9.0; 79% females. Injury, illness, and holidaying were the main reasons for ceasing participation. A small but important number of responses (11% reported that they considered they were not provided with sufficient support during the resistance training programs.Conclusions: To attract and retain their senior clients, the results indicate that program organizers need to provide tailored support to return to resistance training after injury and offer flexible and individualized services that accommodate older people’s life choices in retirement. Keywords: older people, strength training, gymnasium, retention, aging

  10. Meal ingestion markedly increases liver stiffness suggesting the need for liver stiffness determination in fasting conditions.

    Science.gov (United States)

    Alvarez, Daniel; Orozco, Federico; Mella, José María; Anders, Maria; Antinucci, Florencia; Mastai, Ricardo

    2015-01-01

    The introduction of noninvasive liver stiffness (LS) determination has heralded a new stage in the diagnosis and treatment of liver fibrosis. We evaluated the effect of food intake on LS in patients with different degrees of liver disease. We evaluated 24 patients (F≤1, n=11 and F> 1, n=13). LS (Fibroscan®) and portal blood flow (PBF) (Doppler ultrasound) were studied before and 30min after ingestion of a standard liquid meal. Food intake increased PBF (51±10%, p1). Hemodynamic and LS values returned to baseline pre-meal levels within 2hours. LS increases markedly after ingestion of a standard meal, irrespective of the degree of fibrosis. Our results strongly suggest that LS should be measured in fasting conditions. Copyright © 2015 Elsevier España, S.L.U. and AEEH y AEG. All rights reserved.

  11. Assessing seniors' user experience (UX) of exergames for balance training

    DEFF Research Database (Denmark)

    Nawaz, Ather; Skjæret, Nina; Ystmark, Kristine

    2014-01-01

    Exergames technologies are increasingly used to help people achieve their exercise requirements including balance training. However, little is known about seniors' user experience of exergame technology for balance training and what factors they consider most important for using the exergames....... This study aims to evaluate user experience and preferences of exergame technologies to train balance and to identify different factors that affect seniors' intention to use exergames. Fourteen healthy senior citizens played three different stepping exergames in a laboratory setting. Seniors' experience...... of the exergames and their preference to use exergames was assessed using a semi-structured interview, the system usability scale (SUS), and card ranking. The results of the study showed that in order for seniors to use exergames to train their balance, the exergames should particularly focus on challenging tasks...

  12. Senior nurses as patients: narratives of special and meagre care.

    Science.gov (United States)

    Duke, Jan; Connor, Margaret

    2008-12-01

    Like the general population, nurses become patients within the health care services available to them. They write anecdotal accounts of their experience and research the experience of their colleagues. This paper reports a small descriptive study of how the positions of senior nurses who experienced a life threatening condition influenced their illness trajectories. Eleven nurses in both New Zealand and Australia told stories of their experiences which focussed on intercessions/intervention by themselves, their family and the health care team. Themes identified were: looking after our own, the gaze of family and friends in advocacy and intercession, stereotypes of nurses as patients, senior nurses as vulnerable patients - existential healing through the small things, and senior nurses as knowledgeable people. Within these themes were narratives of special and meagre care. The authors conclude that all senior nurses should receive care that is regardful of who they are as senior nurses and vulnerable patients.

  13. Diagnosis and management of osteoporosis in the older senior

    Directory of Open Access Journals (Sweden)

    Sheryl F Vondracek

    2009-03-01

    Full Text Available Sheryl F Vondracek, Sunny A LinneburDepartment of Clinical Pharmacy, School of Pharmacy C238-L15, University of Colorado Denver, Aurora, CO, USAAbstract: The older senior is at high risk for osteoporosis. It is important for healthcare providers to be fully aware of the potential risks and benefits of diagnosing and treating osteoporosis in the older senior population. Data indicate that bone mineral density testing is under-utilized and drug therapy is often not initiated when indicated in this population. Bone mineral density testing with central dual energy x-ray absorptiometry is essential and cost-effective in this population. All older seniors should be educated on a bone-healthy lifestyle including age-appropriate weightbearing exercise and smoking cessation if necessary. It is important to remember that falls play a very important role in the risk for osteoporotic fractures, especially in the older senior. All older seniors should be evaluated annually for falls and strategies should be implemented to reduce fall risk in this population. The risk for vitamin D insufficiency and deficiency is high in the older senior and can contribute to falls and fractures. Adequate intakes of calcium and vitamin D are important and deficiencies need to be treated. Data on osteoporosis drug therapy in the older senior are lacking. Based on data from subgroup analyses of large osteoporosis trials in postmenopausal women, current osteoporosis therapies appear safe and efficacious in the older senior and most will live long enough to derive a benefit from these therapies. Further studies are needed in older seniors, especially men, to better understand the risks and benefits of pharmacologic therapy for the management of osteoporosis.Keywords: osteoporosis, aged, elderly, eighty and over, senior, diphosphonates

  14. Paid caregiver motivation, work conditions, and falls among senior clients.

    Science.gov (United States)

    Lindquist, Lee A; Tam, Karen; Friesema, Elisha; Martin, Gary J

    2012-01-01

    The purpose of this study was to determine the motivation of paid non-familial caregivers of seniors, understand more about their work conditions, and identify any links to negative outcomes among their senior clients. Ninety-eight paid caregivers (eighty-five female and thirteen male), recruited from multiple sites (i.e. senior centers, shopping malls, local parks, lobbies of senior apartments, caregiver agency meetings) completed face-to-face questionnaires and semi-structured interviews. We found that 60.7% of participants chose to become a caregiver because they enjoyed being with seniors while 31.7% were unable to obtain other work, and 8.2% stated it was a prerequisite to a different health related occupation. Caregivers stated that the most challenging conditions of their work were physical lifting (24.5%), behavioral and psychological symptoms of dementia (24.5%), senior depression/mood changes (18.4%), attachment with impending death (8.2%), missing injuries to client (5.1%), lack of sleep (4.1%), and lack of connection with outside world (3.1%). Caregivers who reported that the best part of their job was the salary, flexible hours, and ease of work were significantly more likely to have clients who fell and fractured a bone than those who enjoyed being with seniors (job characteristics, 62.5% vs. senior enjoyment, 25.6%; pmotivated commonly by their love of seniors and also by their lack of other job opportunities. Paid caregivers frequently face challenging work conditions. When seeking a caregiver for a senior, motivation of the caregiver should be considered when hiring. Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

  15. 77 FR 62211 - Senior Executive Services (SES) Performance Review Board: Update

    Science.gov (United States)

    2012-10-12

    ... AGENCY FOR INTERNATIONAL DEVELOPMENT Senior Executive Services (SES) Performance Review Board... International Development, Office of Inspector General's Senior Executive Service Performance Review Board... Performance Review Boards. The board shall review and evaluate the initial appraisal of each USAID OIG senior...

  16. Toilet Grab-Bar Preference and Center of Pressure Deviation During Toilet Transfers in Healthy Seniors, Seniors With Hip Replacements, and Seniors Having Suffered a Stroke.

    Science.gov (United States)

    Kennedy, Matthew Joel; Arcelus, Amaya; Guitard, Paulette; Goubran, R A; Sveistrup, Heidi

    2015-01-01

    Multiple toilet grab-bar configurations are required by people with a diverse spectrum of disability. The study purpose was to determine toilet grab-bar preference of healthy seniors, seniors with a hip replacement, and seniors post-stroke, and to determine the effect of each configuration on centre of pressure (COP) displacement during toilet transfers. 14 healthy seniors, 7 ambulatory seniors with a hip replacement, and 8 ambulatory seniors post-stroke participated in the study. Toilet transfers were performed with no bars (NB), commode (C), two vertical bars (2VB), one vertical bar (1VB), a horizontal bar (H), two swing-away bars (S) and a diagonal bar (D). COP was measured using pressure sensitive floor mats. Participants rated the safety, ease of use, helpfulness, comfort and preference for instalment. 2VB was most preferred and had the smallest COP deviation. Least preferred was H and NB. C caused largest COP displacement but had favourable ratings. The preference and safety of the 2VB should be considered in the design of accessible toilets and in accessibility construction guidelines. However these results need to be verified in non-ambulatory populations. C is frequently prescribed, but generates large COP deviation, suggesting it may present an increased risk of falls.

  17. Safety Culture and Senior Leadership Behavior: Using Negative Safety Ratings to Align Clinical Staff and Senior Leadership.

    Science.gov (United States)

    O'Connor, Shawn; Carlson, Elizabeth

    2016-04-01

    This report describes how staff-designed behavior changes among senior leaders can have a positive impact on clinical nursing staff and enhance the culture of safety in a community hospital. A positive culture of safety in a hospital improves outcomes for patients and staff. Senior leaders are accountable for developing an environment that supports a culture of safety. At 1 community hospital, surveys demonstrated that staff members did not view senior leaders as supportive of or competent in creating a culture of safety. After approval from the hospital's institutional review board was obtained, clinical nurses generated and selected ideas for senior leader behavior change. The new behaviors were assessed by a convenience sample survey of clinical nurses. In addition, culture of safety survey results were compared. Risk reports and harm events were also measured before and after behavior changes. The volume of risk and near-miss reports increased, showing that clinical staff were more inclined to report events after senior leader communication, access, and visibility increased. Harm events went down. The culture of safety survey demonstrated an improvement in the senior leadership domain in 4 of 6 units. The anonymous convenience survey demonstrated that staff members recognized changes that senior leaders had made and felt that these changes positively impacted the culture of safety. By developing skills in communication, advocacy, visibility, and access, senior leaders can enhance a hospital's culture of safety and create stronger ties with clinical staff.

  18. Dynamically tuned magnetostrictive spring with electrically controlled stiffness

    Science.gov (United States)

    Scheidler, Justin J.; Asnani, Vivake M.; Dapino, Marcelo J.

    2016-03-01

    This paper presents the design and testing of an electrically controllable magnetostrictive spring that has a dynamically tunable stiffness (i.e., a magnetostrictive Varispring). The device enables in situ stiffness tuning or stiffness switching for vibration control applications. Using a nonlinear electromechanical transducer model and an analytical solution of linear, mechanically induced magnetic diffusion, Terfenol-D is shown to have a faster rise time to stepped voltage inputs and a significantly higher magnetic diffusion cut-off frequency relative to Galfenol. A Varispring is manufactured using a laminated Terfenol-D rod. Further rise time reductions are achieved by minimizing the rod’s diameter and winding the electromagnet with larger wire. Dynamic tuning of the Varispring’s stiffness is investigated by measuring the Terfenol-D rod’s strain response to dynamic, compressive, axial forces in the presence of sinusoidal or square wave control currents. The Varispring’s rise time is \\lt 1 ms for 1 A current switches. Continuous modulus changes up to 21.9 GPa and 500 Hz and square wave modulus changes (dynamic {{Δ }}E effect) up to 12.3 GPa and 100 Hz are observed. Stiffness tunability and tuning bandwidth can be considerably increased by operating about a more optimal bias stress and improving the control of the electrical input.

  19. Evaluating pulp stiffness from fibre bundles by ultrasound

    Science.gov (United States)

    Karppinen, Timo; Montonen, Risto; Määttänen, Marjo; Ekman, Axel; Myllys, Markko; Timonen, Jussi; Hæggström, Edward

    2012-06-01

    A non-destructive ultrasonic tester was developed to measure the stiffness of pulp bundles. The mechanical properties of pulp are important when estimating the behaviour of paper under stress. Currently available pulp tests are tedious and alter the fibres structurally and mechanically. The developed tester employs (933 ± 15) kHz tweezer-like ultrasonic transducers and time-of-flight measurement through (9.0 ± 2.5) mm long and (0.8 ± 0.1) mm thick fibre bundles kept at (19.1 ± 0.4) °C and (62 ± 1)% RH. We determined the stiffness of soft wood pulps produced by three kraft pulping modifications: standard kraft pulp, (5.2 ± 0.4) GPa, prehydrolysis kraft pulp, (4.3 ± 0.4) GPa, and alkali extracted prehydrolysis kraft pulp, (3.3 ± 0.4) GPa. Prehydrolysis and alkali extraction processes mainly lowered the hemicellulose content of the pulps, which essentially decreased the fibre-wall stiffness hence impairing the stiffness of the fibre networks. Our results indicate that the method allows ranking of pulps according to their stiffness determined from bundle-like samples taken at an early phase of the papermaking process.

  20. Modelling, simulation and experiment of the spherical flexible joint stiffness

    Directory of Open Access Journals (Sweden)

    S. Li

    2018-02-01

    Full Text Available The spherical flexible joint is extensively used in engineering. It is designed to provide flexibility in rotation while bearing vertical compression load. The linear rotational stiffness of the flexible joint is formulated. The rotational stiffness of the bonded rubber layer is related to inner radius, thickness and two edge angles. FEM is used to verify the analytical solution and analyze the stiffness. The Mooney–Rivlin, Neo Hooke and Yeoh constitutive models are used in the simulation. The experiment is taken to obtain the material coefficient and validate the analytical and FEM results. The Yeoh model can reflect the deformation trend more accurately, but the error in the nearly linear district is bigger than the Mooney–Rivlin model. The Mooney–Rivlin model can fit the test result very well and the analytical solution can also be used when the rubber deformation in the flexible joint is small. The increase of Poisson's ratio of the rubber layers will enhance the vertical compression stiffness but barely have effect on the rotational stiffness.

  1. Online Identification and Verification of the Elastic Coupling Torsional Stiffness

    Directory of Open Access Journals (Sweden)

    Wanyou Li

    2016-01-01

    Full Text Available To analyze the torsional vibration of a diesel engine shaft, the torsional stiffness of the flexible coupling is a key kinetic parameter. Since the material properties of the elastic element of the coupling might change after a long-time operation due to the severe working environment or improper use and the variation of such properties will change dynamic feature of the coupling, it will cause a relative large calculation error of torsional vibration to the shaft system. Moreover, the torsional stiffness of the elastic coupling is difficult to be determined, and it is inappropriate to measure this parameter by disassembling the power unit while it is under normal operation. To solve these problems, this paper comes up with a method which combines the torsional vibration test with the calculation of the diesel shafting and uses the inherent characteristics of shaft torsional vibration to identify the dynamic stiffness of the elastic coupling without disassembling the unit. Analysis results show that it is reasonable and feasible to identify the elastic coupling dynamic torsional stiffness with this method and the identified stiffness is accurate. Besides, this method provides a convenient and practical approach to examine the dynamic behavior of the long running elastic coupling.

  2. Generating random walks and polygons with stiffness in confinement

    International Nuclear Information System (INIS)

    Diao, Y; Ernst, C; Saarinen, S; Ziegler, U

    2015-01-01

    The purpose of this paper is to explore ways to generate random walks and polygons in confinement with a bias toward stiffness. Here the stiffness refers to the curvature angle between two consecutive edges along the random walk or polygon. The stiffer the walk (polygon), the smaller this angle on average. Thus random walks and polygons with an elevated stiffness have lower than expected curvatures. The authors introduced and studied several generation algorithms with a stiffness parameter s>0 that regulates the expected curvature angle at a given vertex in which the random walks and polygons are generated one edge at a time using conditional probability density functions. Our generating algorithms also allow the generation of unconfined random walks and polygons with any desired mean curvature angle. In the case of random walks and polygons confined in a sphere of fixed radius, we observe that, as expected, stiff random walks or polygons are more likely to be close to the confinement boundary. The methods developed here require that the random walks and random polygons be rooted at the center of the confinement sphere. (paper)

  3. The impact of polypharmacy on the health of Canadian seniors.

    Science.gov (United States)

    Reason, Ben; Terner, Michael; Moses McKeag, Ali; Tipper, Brenda; Webster, Greg

    2012-08-01

    Prescription medication use increases with age. Seniors face an increased risk of adverse drug reactions from medications, partly because the kidneys and liver can lose functional ability with increasing age, resulting in the need for changes in dosage. To use population survey data to understand the extent and impact of multiple medication use and adverse drug events among Canadian seniors. This study consists of analysis of data from the Canadian Survey of Experiences with Primary Health Care, which was conducted through telephone by Statistics Canada in 2008. These analyses focussed on the 3132 respondents who were ≥ 65 years of age. Twenty-seven per cent of seniors reported taking five or more medications on a regular basis. Within the past year, 12% of seniors taking five or more medications experienced a side effect that required medical attention compared with 5% of seniors taking only one or two medications. Even when controlling for age and number of chronic conditions, the number of prescription medications was associated with the rate of emergency department use. Less than half of all seniors reported having received medication reviews and having the possible side effects of their prescription medications explained to them by their physician. Many Canadian seniors have an elevated risk of adverse events due to taking a high number of prescription medications and not having the potential side effects and drug interactions explained to them. There are interventions that can potentially reduce polypharmacy and adverse events, including routine medication reviews.

  4. An urgent need to improve life conditions of seniors.

    Science.gov (United States)

    Hebert, R

    2010-10-01

    In the fall of 2007, the Government of Quebec set up a Public Consultation on Living Conditions of Seniors. Fifty sessions were held in 26 cities across all 17 regions of the province. More than 4000 seniors attended the sessions and 275 briefs were received from scientists and associations. Three themes were identified in the report published in 2008: supporting seniors and their caregivers, reinforcing the place of seniors in society, and preventing problems associated with aging (suicide, abuse, addictions). The main actions that I recommended included: Increasing the Guaranteed Income Supplement to prevent poverty; Modifying pension plans and working conditions to allow for progressive retirement; Making a major investment in home care to provide access to services regardless of place of residence; Introducing an Autonomy Support Benefit and autonomy insurance program for financing services to support people with disabilities; Generalizing an Integrated Service Delivery Network providing services to frail older people; Better training for professionals in gerontology. I also recommended setting up a National Policy on Seniors to align all government departments and agencies, municipalities and the private sector around a vision, objectives and a set of actions for improving the integration of seniors in an aging society. This would contribute to a more equitable, interdependent and wiser society. Unfortunately, the Government did not support these recommendations. It is now time for scientists to get involved in leading policy on seniors and in the political arena.

  5. Has ADVANCE Affected Senior Compared to Junior Women Scientists Differently?

    Science.gov (United States)

    Rosser, Sue

    2015-01-01

    Substantial evidence exists to demonstrate that the NSF ADVANCE Inititiative has made a positive impact upon institutions. Since it began in 2001, ADVANCE has changed the conversation, policies, and practices in ways to remove obstacles and systemic barriers preventing success for academic women scientists and engineers. Results from ADVANCE projects on campuses have facilitated consensus nationally about policies and practices that institutions may implement to help to alleviate issues, particularly for junior women scientists.Although getting women into senior and leadership positions in STEM constituted an initial impetus for ADVANCE, less emphasis was placed upon the needs of senior women scientists. Surveys of academic women scientists indicate that the issues faced by junior and senior women scientists differ significantly. The focus of ADVANCE on junior women in many ways seemed appropriate--the senior cohort of women scinetists is fed by the junior cohort of scientists; senior women serve as mentors, role models, and leaders for the junior colleagues, while continuing to struggle to achieve full status in the profession. This presentation will center on the differences in issues faced by senior compared to junior women scientists to explore whether a next step for ADVANCE should be to address needs of senior academic women scientists.

  6. Inverse axial mounting stiffness design for lithographic projection lenses.

    Science.gov (United States)

    Wen-quan, Yuan; Hong-bo, Shang; Wei, Zhang

    2014-09-01

    In order to balance axial mounting stiffness of lithographic projection lenses and the image quality under dynamic working conditions, an easy inverse axial mounting stiffness design method is developed in this article. Imaging quality deterioration at the wafer under different axial vibration levels is analyzed. The desired image quality can be determined according to practical requirements, and axial vibrational tolerance of each lens is solved with the damped least-squares method. Based on adaptive interval adjustment, a binary search algorithm, and the finite element method, the axial mounting stiffness of each lens can be traveled in a large interval, and converges to a moderate numerical solution which makes the axial vibrational amplitude of the lens converge to its axial vibrational tolerance. Model simulation is carried out to validate the effectiveness of the method.

  7. Mixed, Nonsplit, Extended Stability, Stiff Integration of Reaction Diffusion Equations

    KAUST Repository

    Alzahrani, Hasnaa H.

    2016-07-26

    A tailored integration scheme is developed to treat stiff reaction-diffusion prob- lems. The construction adapts a stiff solver, namely VODE, to treat reaction im- plicitly together with explicit treatment of diffusion. The second-order Runge-Kutta- Chebyshev (RKC) scheme is adjusted to integrate diffusion. Spatial operator is de- scretised by second-order finite differences on a uniform grid. The overall solution is advanced over S fractional stiff integrations, where S corresponds to the number of RKC stages. The behavior of the scheme is analyzed by applying it to three simple problems. The results show that it achieves second-order accuracy, thus, preserving the formal accuracy of the original RKC. The presented development sets the stage for future extensions, particularly, to multidimensional reacting flows with detailed chemistry.

  8. Mass and stiffness calibration of nanowires using thermally driven vibration

    International Nuclear Information System (INIS)

    Kiracofe, D R; Raman, A; Yazdanpanah, M M

    2011-01-01

    Cantilevered or suspended nanowires show promise for force or mass sensing applications due to their small mass, high force sensitivity and high frequency bandwidth. To use these as quantitative sensors, their bending stiffness or mass must be calibrated experimentally, often using thermally driven vibration. However, this can be difficult because nanowires are slightly asymmetric, which results in two spatially orthogonal bending eigenmodes with closely spaced frequencies. This asymmetry presents problems for traditional stiffness calibration methods, which equate the measured thermal vibration spectrum near a resonance to that of a single eigenmode. Moreover, the principal axes may be arbitrarily rotated with respect to the measurement direction. In this work, the authors propose a method for calibrating the bending stiffness and mass of such nanowires' eigenmodes using a single measurement taken at an arbitrary orientation with respect to the principal axes.

  9. Analytical study of a quasi-zero stiffness coupling using a torsion magnetic spring with negative stiffness

    Science.gov (United States)

    Zheng, Yisheng; Zhang, Xinong; Luo, Yajun; Zhang, Yahong; Xie, Shilin

    2018-02-01

    By now, many translation quasi-zero stiffness (QZS) mechanisms have been proposed to overcome the restriction between the isolation frequency range and the load bearing capacity of linear isolators. The couplings of rotor systems undertake the functions of transmitting static driving torque and isolating disturbing torque simultaneously, which creates the demand of torsion QZS mechanisms. Hence a QZS coupling is presented in this paper, where a torsion magnetic spring (TMS) composed of two coaxial ring magnet arrangements in repulsive configuration is employed to produce negative torsion stiffness to counteract the positive stiffness of a rubber spring. In this paper, the expressions of magnetic torque and stiffness are given firstly and verified by finite element simulations; and the effect of geometric parameters of the TMS on its stiffness characteristic is analyzed in detail, which contributes to the optimal design of the TMS. Then dynamic analysis of the QZS coupling is performed and the analytical expression of the torque transmissibility is achieved based on the Harmonic Balance Method. Finally, simulation of the torque transmissibility is carried out to reveal how geometric parameters of the TMS affect the isolation performance.

  10. Exploring senior nurses' experiences of leading organizational change.

    Science.gov (United States)

    Boyal, Amunpreet; Hewison, Alistair

    2016-01-01

    Purpose - The aim of this paper is to explore Senior nurses' experiences of leading organizational change. There is a substantial literature reporting middle-level nurse managers' experiences of change; however, there is less evidence concerning senior nurses' perspectives. In view of this, interview data collected from senior nurses, as part of a study of major organizational change, were analysed to redress this imbalance. Design/methodology/approach - In-depth semi-structured interviews (n = 14) were conducted with senior nurses (between 2009 and 2012). Findings - Senior nurses' activity centred on leadership and workforce issues, internal influences and external pressures. In periods of change, appropriate leadership was vital, and "weak" leaders were considered to have an adverse effect on teams. Concerns were expressed about financial strictures and their impact on patient care and service provision. The senior nurses were striving to provide the best quality of service delivery with the limited resources available. Concentration on operational matters was necessary to maintain stability in periods of change. However, this prevented senior nurses from influencing strategic decision-making in their organizations. Practical implications - If senior nurses are to realise their potential to operate at a strategic level, they need to be given time and support to lead, rather than just react to change. This research emphasises the importance of a "nursing voice" to inform board-level decisions and maintain a focus on patient care. Originality/value - This research sheds light on the work of a key group of staff in health-care organizations. Understanding senior nurses' experience of and contribution to change is a useful contribution to health services research.

  11. Modifiable risk factors for increased arterial stiffness in outpatient nephrology.

    Directory of Open Access Journals (Sweden)

    Usama Elewa

    Full Text Available Arterial stiffness, as measured by pulse wave velocity (PWV, is an independent predictor of cardiovascular events and mortality. Arterial stiffness increases with age. However, modifiable risk factors such as smoking, BP and salt intake also impact on PWV. The finding of modifiable risk factors may lead to the identification of treatable factors, and, thus, is of interest to practicing nephrologist. We have now studied the prevalence and correlates of arterial stiffness, assessed by PWV, in 191 patients from nephrology outpatient clinics in order to identify modifiable risk factors for arterial stiffness that may in the future guide therapeutic decision-making. PWV was above normal levels for age in 85/191 (44.5% patients. Multivariate analysis showed that advanced age, systolic BP, diabetes mellitus, serum uric acid and calcium polystyrene sulfonate therapy or calcium-containing medication were independent predictors of PWV. A new parameter, Delta above upper limit of normal PWV (Delta PWV was defined to decrease the weight of age on PWV values. Delta PWV was calculated as (measured PWV - (upper limit of the age-adjusted PWV values for the general population. Mean±SD Delta PWV was 0.76±1.60 m/sec. In multivariate analysis, systolic blood pressure, active smoking and calcium polystyrene sulfonate therapy remained independent predictors of higher delta PWV, while age, urinary potassium and beta blocker therapy were independent predictors of lower delta PWV. In conclusion, arterial stiffness was frequent in nephrology outpatients. Systolic blood pressure, smoking, serum uric acid, calcium-containing medications, potassium metabolism and non-use of beta blockers are modifiable factors associated with increased arterial stiffness in Nephrology outpatients.

  12. Betel nut chewing associated with increased risk of arterial stiffness.

    Science.gov (United States)

    Wei, Yu-Ting; Chou, Yu-Tsung; Yang, Yi-Ching; Chou, Chieh-Ying; Lu, Feng-Hwa; Chang, Chih-Jen; Wu, Jin-Shang

    2017-11-01

    Betel nut chewing is associated with certain cardiovascular outcomes. Subclinical atherosclerosis may be one link between betel nut chewing and cardiovascular risk. Few studies have examined the association between chewing betel nut and arterial stiffness. The aim of this study was thus to determine the relationship between betel nut chewing and arterial stiffness in a Taiwanese population. We enrolled 7540 eligible subjects in National Cheng Kung University Hospital from October 2006 to August 2009. The exclusion criteria included history of cerebrovascular events, coronary artery disease, and taking lipid-lowering drugs, antihypertensives, and hypoglycemic agents. Increased arterial stiffness was defined as brachial-ankle pulse wave velocity (baPWV) ≥1400cm/s. According to their habit of betel nut use, the subjects were categorized into non-, ex-, and current chewers. The prevalence of increased arterial stiffness was 32.7, 43.3, and 43.2% in non-, ex- and current chewers, respectively (p=0.011). Multiple logistic regression analysis revealed that ex-chewers (odds ratio [OR] 1.69, 95% confidence interval (CI)=1.08-2.65) and current chewers (OR 2.29, 95% CI=1.05-4.99) had elevated risks of increased arterial stiffness after adjustment for co-variables. Both ex- and current betel nut chewing were associated with a higher risk of increased arterial stiffness. Stopping betel nut chewing may thus potentially be beneficial to reduce cardiovascular risk, based on the principals of preventive medicine. Copyright © 2017 Elsevier B.V. All rights reserved.

  13. Artificial neural networks for stiffness estimation in magnetic resonance elastography.

    Science.gov (United States)

    Murphy, Matthew C; Manduca, Armando; Trzasko, Joshua D; Glaser, Kevin J; Huston, John; Ehman, Richard L

    2018-07-01

    To investigate the feasibility of using artificial neural networks to estimate stiffness from MR elastography (MRE) data. Artificial neural networks were fit using model-based training patterns to estimate stiffness from images of displacement using a patch size of ∼1 cm in each dimension. These neural network inversions (NNIs) were then evaluated in a set of simulation experiments designed to investigate the effects of wave interference and noise on NNI accuracy. NNI was also tested in vivo, comparing NNI results against currently used methods. In 4 simulation experiments, NNI performed as well or better than direct inversion (DI) for predicting the known stiffness of the data. Summary NNI results were also shown to be significantly correlated with DI results in the liver (R 2  = 0.974) and in the brain (R 2  = 0.915), and also correlated with established biological effects including fibrosis stage in the liver and age in the brain. Finally, repeatability error was lower in the brain using NNI compared to DI, and voxel-wise modeling using NNI stiffness maps detected larger effects than using DI maps with similar levels of smoothing. Artificial neural networks represent a new approach to inversion of MRE data. Summary results from NNI and DI are highly correlated and both are capable of detecting biologically relevant signals. Preliminary evidence suggests that NNI stiffness estimates may be more resistant to noise than an algebraic DI approach. Taken together, these results merit future investigation into NNIs to improve the estimation of stiffness in small regions. Magn Reson Med 80:351-360, 2018. © 2017 International Society for Magnetic Resonance in Medicine. © 2017 International Society for Magnetic Resonance in Medicine.

  14. g-factor calculations from the generalized seniority approach

    Science.gov (United States)

    Maheshwari, Bhoomika; Jain, Ashok Kumar

    2018-05-01

    The generalized seniority approach proposed by us to understand the B(E1)/B(E2)/B(E3) properties of semi-magic nuclei has been widely successful in the explanation of the same and has led to an expansion in the scope of seniority isomers. In the present paper, we apply the generalized seniority scheme to understand the behavior of g-factors in semi-magic nuclei. We find that the magnetic moment and the gfactors do show a particle number independent behavior as expected and the understanding is consistent with the explanation of transition probabilities.

  15. Evidens om effekten af indsatser for ledige seniorer

    DEFF Research Database (Denmark)

    Bach, Henning Bjerregaard; Mehlsen, Line; Høgelund, Jan

    evidens for, at samtaler har en positiv effekt for ledige seniorers overgang til beskæftigelse - indikation for, at tidlige indsatser har en positiv effekt for ledige seniorers overgang til beskæftigelse - stærk evidens for tilstedeværelsen af positive motivationseffekter, som fremkommer ved en generel...... forpligtigelse for ledige seniorer til at deltage i den almindelige aktiveringsindsats for ledige eller dokumenteret jobsøgning. Denne oversigt er en i rækken af litteraturoversigter, som Styrelsen for Arbejdsmarked og Rekruttering har taget initiativ til....

  16. Health care information seeking and seniors: determinants of Internet use.

    Science.gov (United States)

    Sheng, Xiaojing; Simpson, Penny M

    2015-01-01

    While seniors are the most likely population segment to have chronic diseases, they are the least likely to seek information about health and diseases on the Internet. An understanding of factors that impact seniors' usage of the Internet for health care information may provide them with tools needed to improve health. This research examined some of these factors as identified in the comprehensive model of information seeking to find that demographics, trust in health information websites, perceived usefulness of the Internet, and internal locus of control each significantly impact seniors' use of the Internet to seek health information.

  17. An analysis of valve train behavior considering stiffness effects

    International Nuclear Information System (INIS)

    Chun, Dong Joon; Lee, Jin Kab

    2000-01-01

    To maintain the specific volumetric efficiency of a heavy-duty diesel engine, an understanding of the behavior of each part of the valve train system is very important. The stiffness of the valve train system has a strong influence on the behavior of the valve train than value clearance, heat-resistance, or the durability of parts. In this study, a geometrical cam design profile using a finite element model of the valve train system is suggested. The results of the valve behavior according to the change in stiffness is analyzed for further tuning of the valve train system

  18. Determination of rolling resistance coefficient based on normal tyre stiffness

    Science.gov (United States)

    Rykov, S. P.; Tarasuyk, V. N.; Koval, V. S.; Ovchinnikova, N. I.; Fedotov, A. I.; Fedotov, K. V.

    2018-03-01

    The purpose of the article is to develop analytical dependence of wheel rolling resistance coefficient based on the mathematical description of normal tyre stiffness. The article uses the methods of non-holonomic mechanics and plane section methods. The article shows that the abscissa of gravity center of tyre stiffness expansion by the length of the contact area is the shift of normal road response. It can be used for determining rolling resistance coefficient. When determining rolling resistance coefficient using ellipsis and power function equations, one can reduce labor costs for testing and increase assessment accuracy.

  19. Geriatric sexual experiences: The seniors tell all.

    Science.gov (United States)

    Roney, Linda; Kazer, Meredith Wallace

    2015-08-01

    To gain insight into the aging sexual health experiences and concerns of older adults aged 60 years or older. Despite the prevalence of sexual activity among older adults and the documented health benefits, little is known about how sexual health changes as individuals age. Participants for this study were recruited through a local senior center and qualitative interviews were conducted. Eight older adults (six female, two male) between the ages of 62 and 95 participated in this study. Some participants commented that expression of sexuality changed due to partner's health. Some identified less sexual frequency and spontaneity, while others stated that they were now more open with their sexual relationship. Participants stated that they wished their or their partner's physicians would discuss their sexual needs. Sexual changes reported by participants in this study were consistent with the research relating sexual health to overall health. The finding that half the sample did not discuss sexual problems with anyone highlights the opportunity for nursing research to further explore this phenomenon. Copyright © 2015 Elsevier Inc. All rights reserved.

  20. Detection and Prevention of Seniors Falls

    Directory of Open Access Journals (Sweden)

    Lubomír MACKŮ

    2016-11-01

    Full Text Available The paper deals with the issue of seniors’ security and safety, namely the security problems related to falls of independently living elderly citizens. The number of elderly people is growing very fast worldwide and very often they live unattended in their house or flat. In case of accidently falling down, they are often unable help themselves and stay on the floor for hours or even longer. This may lead even to the death if no help comes. Various possibilities of their fall detection are studied. We analyze the historical development, current capabilities and efficiency of different approaches and methods. We address the willingness and ability of seniors to actively use technology, detection limits, privacy, personal data security and other important factors. In addition, we discuss the challenges, current shortcomings, issues and trends in fall detection or operation reliability in real-life conditions. The main future goal would be to maintain the personal privacy and security of irrelevant information in modern fall detection systems.

  1. Seniority-based coupled cluster theory

    International Nuclear Information System (INIS)

    Henderson, Thomas M.; Scuseria, Gustavo E.; Bulik, Ireneusz W.; Stein, Tamar

    2014-01-01

    Doubly occupied configuration interaction (DOCI) with optimized orbitals often accurately describes strong correlations while working in a Hilbert space much smaller than that needed for full configuration interaction. However, the scaling of such calculations remains combinatorial with system size. Pair coupled cluster doubles (pCCD) is very successful in reproducing DOCI energetically, but can do so with low polynomial scaling (N 3 , disregarding the two-electron integral transformation from atomic to molecular orbitals). We show here several examples illustrating the success of pCCD in reproducing both the DOCI energy and wave function and show how this success frequently comes about. What DOCI and pCCD lack are an effective treatment of dynamic correlations, which we here add by including higher-seniority cluster amplitudes which are excluded from pCCD. This frozen pair coupled cluster approach is comparable in cost to traditional closed-shell coupled cluster methods with results that are competitive for weakly correlated systems and often superior for the description of strongly correlated systems

  2. [Senior citizen's physical activity and welfare].

    Science.gov (United States)

    Santana, Maria da Silva; Chaves Maia, Eulália M

    2009-01-01

    This work analysed senior citizens' perception of needs and social values involved in taking physical activity for their own benefit. This study's main aim was to investigate social representations of 3rd age physical activity. This was a cross-sectional, interdisciplinary qualitative study, underpinned by theoretical-methodological social representation theory. A convenience, non-probabilistic, census-dependent method was used for obtaining the sam-ple of 62 people aged 50 to 78 from north-eastern Brazil. The data were collected by using the free word association technique and analysed by EVOC/2000 software. Analysing the replies led to three types of elements being identified which were related to the social representation of physical activity as attributed by the elderly: a psychological dimension (represented by happiness, well-being), a social dimension (dancing) and a biophysical dimension (gymnastics, water-gymnastics and health). The term 'happiness' stood out most in the word recall tests. When relating old age to the sample's social representation of physical activity, the study showed that physical activity assumed a preponderant role in the life of the elderly through cyclical appreciation-depreciation, social representation simultaneously and gradually acquiring 'life having more health and quality' from social representation. The subjects reported a positive association between physical activity, social interaction and well-being. The elderly also believed in physical activity's effects on physical-motor aspects and health. The social representation of physical activity by the group being studied was close to the physical activity's biopsychosocial dimension.

  3. 1997 Atmospheric Chemistry Colloquium for Emerging Senior Scientists

    Energy Technology Data Exchange (ETDEWEB)

    Paul H. Wine

    1998-11-23

    DOE's Atmospheric Chemistry Program is providing partial funding for the Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS) and FY 1997 Gordon Research Conference in Atmospheric Chemistry

  4. Configuration interaction wave functions: A seniority number approach

    International Nuclear Information System (INIS)

    Alcoba, Diego R.; Torre, Alicia; Lain, Luis; Massaccesi, Gustavo E.; Oña, Ofelia B.

    2014-01-01

    This work deals with the configuration interaction method when an N-electron Hamiltonian is projected on Slater determinants which are classified according to their seniority number values. We study the spin features of the wave functions and the size of the matrices required to formulate states of any spin symmetry within this treatment. Correlation energies associated with the wave functions arising from the seniority-based configuration interaction procedure are determined for three types of molecular orbital basis: canonical molecular orbitals, natural orbitals, and the orbitals resulting from minimizing the expectation value of the N-electron seniority number operator. The performance of these bases is analyzed by means of numerical results obtained from selected N-electron systems of several spin symmetries. The comparison of the results highlights the efficiency of the molecular orbital basis which minimizes the mean value of the seniority number for a state, yielding energy values closer to those provided by the full configuration interaction procedure

  5. Rapid Communication: seniority changing transitions in yrast states ...

    Indian Academy of Sciences (India)

    Bhoomika Maheshwari

    2017-10-26

    Oct 26, 2017 ... Rapid Communication: v = 2 seniority changing ... has been extensively used to understand various system- .... states. This understanding supports the previous inter- ..... Financial support from the Ministry of Human Resource.

  6. Institutional Entrepreneurs and Social Innovation in Danish Senior Care

    DEFF Research Database (Denmark)

    Jensen, Per Harboesgaard; Fersch, Barbara

    2018-01-01

    This article discusses the social, political, and administrative dynamics behind shifting welfare policies and social innovations in the senior care provided by Danish municipalities. The main argument is that institutional entrepreneurs are key agents of change and that institutional...

  7. Effect of Process Approach to Writing on Senior Secondary Students ...

    African Journals Online (AJOL)

    Effect of Process Approach to Writing on Senior Secondary Students' ... The study adopted a quasi-experimental non equivalent pretest-posttest research design. ... Key words: process approach, product approach, essay, writing, achievement.

  8. [Strategy for educating senior dermatological residents in mycology].

    Science.gov (United States)

    Mochizuki, Takashi; Tsuboi, Ryoji; Sei, Yoshihiro; Hiruma, Masataro; Watanabe, Shinichi; Makimura, Koichi

    2012-01-01

    To improve the ability of dermatologists to diagnose cutaneous mycoses, we have proposed a list of the minimum mycological knowledge and skills required by senior residents of dermatology. The list includes ability to select the most appropriate sampling method, knowledge of the basic method of potassium hydroxide (KOH) examination and skill in performing fungal cultures and identifying the most prevalent fungal species isolated from skin lesions. It is not possible for the Japanese Society of Medical Mycology to train every senior resident directly, and it is difficult for them to acquire sufficient expertise independently. Consequently, training and advice given by instructors in residents' home institutes is essential. A project of an advanced course for instructors, who are in charge of educating senior residents in their own institute, may be possible. Therefore, we have proposed here a list for instructors of the knowledge and skills required to educate senior residents. Employing this list should realize improved skill in dermatologists.

  9. Markel senior vice president to give Wachovia Lecture

    OpenAIRE

    Ho, Sookhan

    2008-01-01

    Markel Corporation's senior vice president and chief financial officer Richard R. Whitt will give a talk on Thursday, Nov. 13, as the Wachovia Distinguished Speaker in the Pamplin College of Business.

  10. Africa Center for Strategic Studies Senior Leader Seminar. Academic Summary

    National Research Council Canada - National Science Library

    1999-01-01

    From October 31 to November 12, 1999, 115 civilian and military officials from Africa, Europe, and the United States participated in the inaugural Senior Leader Seminar of the Africa Center for Strategic Studies (ACSS) in Dakar, Senegal...

  11. 75 FR 35877 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2010-06-23

    ... of the senior executive. The persons named below have been selected to serve on STB's PRB: Leland L..., Director, Office of Public Assistance, Governmental Affairs, and Enforcement; Rachel D. Campbell, Director...

  12. 76 FR 46896 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2011-08-03

    ... of the senior executive. The persons named below have been selected to serve on STB's PRB. Leland L. Gardner, Director, Office of the Managing Director; Rachel D. Campbell, Director, Office of Proceedings...

  13. Physical activity and senior games participation: benefits, constraints, and behaviors.

    Science.gov (United States)

    Cardenas, David; Henderson, Karla A; Wilson, Beth E

    2009-04-01

    The purpose of the article was to examine the physical activity perceptions and behaviors of older adults who were active participants in a statewide senior games (i.e., North Carolina Senior Games; NCSG) program with its focus on year-round involvement through activities in local communities. A random sample of 440 older adults (55 years and older) completed a questionnaire in 2006 about their participation in community-based senior games. A uniqueness of this study is its focus on active older adults, which provides insight into how to maintain physical involvement. Older adults who were most active perceived the most benefits from senior games but did not necessarily have the fewest constraints. This study of NCSG as an organization designed to promote healthy living in communities offered an example of how a social-ecological framework aimed at health promotion can be applied.

  14. 76 FR 60090 - Performance Review Board, Senior Executive Service (SES)

    Science.gov (United States)

    2011-09-28

    ... Headquarters. Assistant Administrator for Human Capital Management, NASA Headquarters. Chief Financial Officer..., Dryden Flight Research Center. Director, Glenn Research Center. Director, Goddard Space Flight Center..., Marshall Space Flight Center. Director, Stennis Space Center. Senior Executive Committee Chairperson...

  15. 4 CFR 9.1 - GAO Senior Executive Service.

    Science.gov (United States)

    2010-01-01

    ... performance and success in meeting equal employment opportunity goals); (3) Assure that senior executives are..., political activity, and conflicts of interest; (12) Provide for the initial and continuing systematic...

  16. Advancing Army Women as Senior Leaders - Understanding the Obstacles

    National Research Council Canada - National Science Library

    Ellefson, Kristi

    1998-01-01

    This paper examined through research, whether any evidence exists which indicates that, army women are confronted with inherent obstacles as they try to advance through the ranks to senior level positions...

  17. Senior Financial Analyst – External Funds Management | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Job Summary The Senior Financial Analyst, External Funds Management is responsible ... in accordance with the donor agreements and accounting principles. ... Assist the Manager in the development of the financial accounting structure for ...

  18. Senior travelers' trip chaining behavior : survey results and data analysis.

    Science.gov (United States)

    2011-08-01

    The research team conducted a survey of travel and activity scheduling behavior to better understand senior : citizens trip chaining behavior in the Chicago metropolitan areas most populous counties. The team used an : internet-based, prompted ...

  19. Mobilizing Senior Citizens in Co-design Work

    DEFF Research Database (Denmark)

    Malmborg, Lone; Werner, Katharina; Gronvall, Erik

    2015-01-01

    This paper addresses methodological considerations of participation in design for ageing. Based on the notions of design culture, communities of everyday practice and situated elderliness we present accounts from two settings and discuss methodological issues related to mobilizing senior citizens...

  20. Mobilizing Senior Citizens in Co-Design of Mobile Technology

    DEFF Research Database (Denmark)

    Malmborg, Lone; Gronvall, Erik; Messeter, Jörn

    2016-01-01

    . Based on the notions of design culture, communities of everyday practice and situated elderliness we present accounts from two European countries, and discuss methodological issues related to mobilizing senior citizens in co-design work as they have manifested themselves and influenced the Give......This paper disseminates work from the European Give&Take project, which aims at co-designing service sharing among senior citizens based on a mobile and distributed platform. With this project as a frame, our paper addresses methodological considerations of participation in co-design for ageing......&Take project. Challenges for mobilization are identified, based on an analysis of attitudes and values among design researchers and senior citizens. This analysis lead us to identify and discuss three strategies for mobilizing senior citizens in co-design of mobile technology: 1) Understanding being ‘elderly...

  1. knowledge and awareness of hiv/aids among some senior ...

    African Journals Online (AJOL)

    DR. AMINU

    senior secondary school students was undertaken in Katsina, Katsina State, Nigeria. The purpose of this study was to provide preliminary data on HIV/AIDS knowledge and awareness among ... (International Barrier Protection Digest, 2004).

  2. Configuration interaction wave functions: A seniority number approach

    Energy Technology Data Exchange (ETDEWEB)

    Alcoba, Diego R. [Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and Instituto de Física de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad Universitaria, 1428 Buenos Aires (Argentina); Torre, Alicia; Lain, Luis, E-mail: qfplapel@lg.ehu.es [Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apdo. 644, E-48080 Bilbao (Spain); Massaccesi, Gustavo E. [Departamento de Ciencias Exactas, Ciclo Básico Común, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires (Argentina); Oña, Ofelia B. [Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Universidad Nacional de La Plata, CCT La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Diag. 113 y 64 (S/N), Sucursal 4, CC 16, 1900 La Plata (Argentina)

    2014-06-21

    This work deals with the configuration interaction method when an N-electron Hamiltonian is projected on Slater determinants which are classified according to their seniority number values. We study the spin features of the wave functions and the size of the matrices required to formulate states of any spin symmetry within this treatment. Correlation energies associated with the wave functions arising from the seniority-based configuration interaction procedure are determined for three types of molecular orbital basis: canonical molecular orbitals, natural orbitals, and the orbitals resulting from minimizing the expectation value of the N-electron seniority number operator. The performance of these bases is analyzed by means of numerical results obtained from selected N-electron systems of several spin symmetries. The comparison of the results highlights the efficiency of the molecular orbital basis which minimizes the mean value of the seniority number for a state, yielding energy values closer to those provided by the full configuration interaction procedure.

  3. Active lifestyle protects against incident low back pain in seniors

    DEFF Research Database (Denmark)

    Hartvigsen, Jan; Christensen, Kaare

    2007-01-01

    STUDY DESIGN: Prospective cohort study of twins. OBJECTIVES: To investigate associations between physical activity, physical function, and incident low back pain (LBP) in an elderly population. SUMMARY OF BACKGROUND DATA: The relationship between an active lifestyle and LBP in seniors is unknown...... to be an important factor affecting whether participants remained engaged in strenuous physical activity at baseline and follow-up or vice versa. CONCLUSIONS: Strenuous physical activity at least once a week is protective for incident LBP in seniors....

  4. SOCIAL MEDIA ADDICTION AND STUDY HABITS OF SENIOR HIGH STUDENTS

    OpenAIRE

    Alejandrino, Mara Philia R; Catipay, Jerico D; Concepcion, Prince Vincent Ace T; Flores, Sally Mae C; Palicte, Cherry Mae D; Seguiro, Arlene C

    2018-01-01

    This research was conducted to determine the significant influence of social media addiction on the study habits of the senior high students in selected school of Agusan del Sur. The researchers used a descriptive correlation method of research which involved the survey of a total of 150 senior high students. Questionnaires were the research instrument used in the gathering of data and was presented to the research adviser for approval and content validity. Mean, Pearson Product Moment Correl...

  5. Labour market mobility among senior workers in Norway

    OpenAIRE

    Tobro, Anne Marte Lunde

    2015-01-01

    As many developed countries, Norway has a growing elderly population and need to administer some policy change to cover the cost of the increasing number of pension recipients. One of the solutions to this problem is to give workers incentive to stay in the workforce longer. This thesis analyse the senior workers labour market mobility by studying the probability of leaving the workforce and the probability for senior workers to conduct a job change. Understanding job-to-nonemployment and job...

  6. Capital Structure and Managerial Compensation: The Effects of Renumeration Seniority

    OpenAIRE

    Calcagno, R.; Renneboog, L.D.R.

    2004-01-01

    We show that the relative seniority of debt and managerial compensation has important implications on the design of remuneration contracts.Whereas the traditional literature assumes that debt is senior to remuneration, we show that this is frequently not the case according to bankruptcy regulation and as observed in practice.We theoretically show that including risky debt changes the incentive to provide the manager with stronger performance-related incentives ("contract substitution" effect)...

  7. An L-stable method for solving stiff hydrodynamics

    Science.gov (United States)

    Li, Shengtai

    2017-07-01

    We develop a new method for simulating the coupled dynamics of gas and multi-species dust grains. The dust grains are treated as pressure-less fluids and their coupling with gas is through stiff drag terms. If an explicit method is used, the numerical time step is subject to the stopping time of the dust particles, which can become extremely small for small grains. The previous semi-implicit method [1] uses second-order trapezoidal rule (TR) on the stiff drag terms and it works only for moderately small size of the dust particles. This is because TR method is only A-stable not L-stable. In this work, we use TR-BDF2 method [2] for the stiff terms in the coupled hydrodynamic equations. The L-stability of TR-BDF2 proves essential in treating a number of dust species. The combination of TR-BDF2 method with the explicit discretization of other hydro terms can solve a wide variety of stiff hydrodynamics equations accurately and efficiently. We have implemented our method in our LA-COMPASS (Los Alamos Computational Astrophysics Suite) package. We have applied the code to simulate some dusty proto-planetary disks and obtained very good match with astronomical observations.

  8. Design of a Variable Stiffness Soft Dexterous Gripper

    Science.gov (United States)

    Nefti-Meziani, Samia; Davis, Steve

    2017-01-01

    Abstract This article presents the design of a variable stiffness, soft, three-fingered dexterous gripper. The gripper uses two designs of McKibben muscles. Extensor muscles that increase in length when pressurized are used to form the fingers of the gripper. Contractor muscles that decrease in length when pressurized are then used to apply forces to the fingers through tendons, which cause flexion and extension of the fingers. The two types of muscles are arranged to act antagonistically and this means that by raising the pressure in all of the pneumatic muscles, the stiffness of the system can be increased without a resulting change in finger position. The article presents the design of the gripper, some basic kinematics to describe its function, and then experimental results demonstrating the ability to adjust the bending stiffness of the gripper's fingers. It has been demonstrated that the fingers' bending stiffness can be increased by more than 150%. The article concludes by demonstrating that the fingers can be closed loop position controlled and are able to track step and sinusoidal inputs. PMID:29062630

  9. Sport stretching : Effect on passive muscle stiffness of short hamstrings

    NARCIS (Netherlands)

    Halbertsma, JPK; vanBolhuis, AI; Goeken, LNH

    Objective: To evaluate the effects of one 10-minute stretch on muscle stiffness in subjects with short hamstrings. Design: Randomized control trial. Setting: Laboratory for human movement sciences in the department of rehabilitation of a university hospital. Subjects: Sixteen students from the

  10. Terminology: resistance or stiffness for medical compression stockings?

    Directory of Open Access Journals (Sweden)

    André Cornu-Thenard

    2013-04-01

    Full Text Available Based on previous experimental work with medical compression stockings it is proposed to restrict the term stiffness to measurements on the human leg and rather to speak about resistance when it comes to characterize the elastic property of compression hosiery in the textile laboratory.

  11. Probing the stiffness of isolated nucleoli by atomic force microscopy.

    Science.gov (United States)

    Louvet, Emilie; Yoshida, Aiko; Kumeta, Masahiro; Takeyasu, Kunio

    2014-04-01

    In eukaryotic cells, ribosome biogenesis occurs in the nucleolus, a membraneless nuclear compartment. Noticeably, the nucleolus is also involved in several nuclear functions, such as cell cycle regulation, non-ribosomal ribonucleoprotein complex assembly, aggresome formation and some virus assembly. The most intriguing question about the nucleolus is how such dynamics processes can occur in such a compact compartment. We hypothesized that its structure may be rather flexible. To investigate this, we used atomic force microscopy (AFM) on isolated nucleoli. Surface topography imaging revealed the beaded structure of the nucleolar surface. With the AFM's ability to measure forces, we were able to determine the stiffness of isolated nucleoli. We could establish that the nucleolar stiffness varies upon drastic morphological changes induced by transcription and proteasome inhibition. Furthermore, upon ribosomal proteins and LaminB1 knockdowns, the nucleolar stiffness was increased. This led us to propose a model where the nucleolus has steady-state stiffness dependent on ribosome biogenesis activity and requires LaminB1 for its flexibility.

  12. Stiffness of the ligaments of the human wrist joint

    NARCIS (Netherlands)

    Savelberg, H.H.C.M.; Kooloos, J.G.M.; Huiskes, H.W.J.; Kauer, J.M.G.

    1992-01-01

    The stiffnesses of the superficial ligaments of 14 human cadaver wrist joints have been determined. In these experiments the tested, fresh-frozen carpal joints are divided into a number of bone-ligament-bone complexes, which are loaded in a tensile testing machine at a rate of 66% of the ligaments'

  13. Development of a variable stiffness and damping tunable vibration isolator

    CSIR Research Space (South Africa)

    Cronje, JM

    2005-03-01

    Full Text Available the amplification at resonance. A practical variable stiffness spring was developed by using a compound leaf spring with circular spring elements. A wax actuator, controlled by a hot-air gun with a closed-loop displacement and velocity feedback control system...

  14. Numerical Integration of Stiff System of Ordinary Differential ...

    African Journals Online (AJOL)

    The goal of this work is to develop, analyse and implement a K-step Implicit Rational Runge-Kutta schemes for Integration of Stiff system of Ordinary differential Equations. Its development adopted Taylor and Binomial series expansion Techniques to generate its parameters. The analysis of its basic properties adopted ...

  15. Homogeneous axisymmetric model with a limitting stiff equation of state

    International Nuclear Information System (INIS)

    Korkina, M.P.; Martynenko, V.G.

    1976-01-01

    A solution is obtained for Einstein's equations in which all metric coefficients are time functions for a limiting stiff equation of the substance state. Thr solution describes a homogeneous cosmological model with cylindrical symmetry. It is shown that the same metrics can be induced by a massless scalar only time-dependent field. Analysis of this solution is presented

  16. Contact stiffness considerations when simulating tyre/road noise

    Science.gov (United States)

    Winroth, Julia; Kropp, Wolfgang; Hoever, Carsten; Höstmad, Patrik

    2017-11-01

    Tyre/road simulation tools that can capture tyre vibrations, rolling resistance and noise generation are useful for understanding the complex processes that are involved and thereby promoting further development and optimisation. The most detailed tyre/road contact models use a spatial discretisation of the contact and assume an interfacial stiffness to account for the small-scale roughness within the elements. This interfacial stiffness has been found to have a significant impact on the simulated noise emissions but no thorough investigations of this sensitivity have been conducted. Three mechanisms are thought to be involved: The horn effect, the modal composition of the vibrational field of the tyre and the contact forces exciting the tyre vibrations. This study used a numerical tyre/road noise simulation tool based on physical relations to investigate these aspects. The model includes a detailed time-domain contact model with linear or non-linear contact springs that accounts for the effect of local tread deformation on smaller length scales. Results confirm that an increase in contact spring stiffness causes a significant increase of the simulated tyre/road noise. This is primarily caused by a corresponding increase in the contact forces, resulting in larger vibrational amplitudes. The horn effect and the modal composition are relatively unaffected and have minor effects on the radiated noise. A more detailed non-linear contact spring formulation with lower stiffness at small indentations results in a reduced high-frequency content in the contact forces and the simulated noise.

  17. Significance of arterial stiffness in Tridosha analysis: A pilot study

    Directory of Open Access Journals (Sweden)

    P. Venkata Giri Kumar

    2017-10-01

    Conclusion: The SI and RI acquired using Nadi Tarangini have shown significant variations across Tridosha locations. The framework developed to measure the arterial stiffness across Tridosha locations can be used for the interventional studies in Ayurveda which in turn can help in disease diagnosis and treatment.

  18. Cardiovascular Health and Arterial Stiffness: The Maine Syracuse Longitudinal Study

    Science.gov (United States)

    Crichton, Georgina E; Elias, Merrill F; Robbins, Michael A

    2014-01-01

    Ideal cardiovascular health is a recently defined construct by the American Heart Association (AHA) to promote cardiovascular disease reduction. Arterial stiffness is a major risk factor for cardiovascular disease. The extent to which the presence of multiple prevalent cardiovascular risk factors and health behaviors is associated with arterial stiffness is unknown. The aim of this study was to examine the association between the AHA construct of cardiovascular health and arterial stiffness, as indexed by pulse wave velocity and pulse pressure. The AHA health metrics, comprising of four health behaviors (smoking, body mass index, physical activity, and diet) and three health factors (total cholesterol, blood pressure, and fasting plasma glucose) were evaluated among 505 participants in the Maine-Syracuse Longitudinal Study. Outcome measures were carotid-femoral pulse wave velocity (PWV) and pulse pressure measured at 4 to 5-year follow-up. Better cardiovascular health, comprising both health factors and behaviors, was associated with lower arterial stiffness, as indexed by pulse wave velocity and pulse pressure. Those with at least five health metrics at ideal levels had significantly lower PWV (9.8 m/s) than those with two or less ideal health metrics (11.7 m/s) (P<0.001). This finding remained with the addition of demographic and PWV-related variables (P=0.004). PMID:24384629

  19. Pre-diabetes and arterial stiffness in uraemic patients

    DEFF Research Database (Denmark)

    Hornum, Mads; Clausen, Peter; Kjaergaard, Jesper

    2010-01-01

    In order to address factors of relevance for new onset diabetes mellitus and cardiovascular disease after kidney transplantation, we investigated the presence of pre-diabetes, arterial stiffness and endothelial dysfunction in patients with end-stage renal disease (ESRD) accepted for kidney...

  20. Stochastic dynamic stiffness of surface footing for offshore wind turbines

    DEFF Research Database (Denmark)

    Vahdatirad, Mohammadjavad; Andersen, Lars Vabbersgaard; Ibsen, Lars Bo

    2014-01-01

    Highlights •This study concerns the stochastic dynamic stiffness of foundations for large offshore wind turbines. •A simple model of wind turbine structure with equivalent coupled springs at the base is utilized. •The level of uncertainties is quantified through a sensitivity analysis. •Estimation...

  1. Stiffness and hysteresis properties of some prosthetic feet

    NARCIS (Netherlands)

    van Jaarsveld, H.W.L.; Grootenboer, H.J.; de Vries, J.; Koopman, Hubertus F.J.M.

    1990-01-01

    A prosthetic foot is an important element of a prosthesis, although it is not always fully recognized that the properties of the foot, along with the prosthetic knee joint and the socket, are in part responsible for the stability and metabolic energy cost during walking. The stiffness and the

  2. Variable stiffness actuators: the user’s point of view

    NARCIS (Netherlands)

    Grioli, Giorgio; Wolf, Sebastian; Garabini, Manolo; Catalano, Manuel; Burdet, Etienne; Caldwell, Darwin; Carloni, Raffaella; Friedl, Werner; Grebenstein, Markus; Laffranchi, Matteo; Lefeber, Dirk; Stramigioli, Stefano; Tsagarakis, Nikos; van Damme, Michael; Vanderborght, Bram; Albu-Shaeffer, Alin; Bicchi, Antonio

    Since their introduction in the early years of this century, variable stiffness actuators (VSA) witnessed a sustained growth of interest in the research community, as shown by the growing number of publications. While many consider VSA very interesting for applications, one of the factors hindering

  3. Riparian Sediment Delivery Ratio: Stiff Diagrams and Artifical Neural Networks

    Science.gov (United States)

    Various methods are used to estimate sediment transport through riparian buffers and grass jilters with the sediment delivery ratio having been the most widely applied. The U.S. Forest Service developed a sediment delivery ratio using the stiff diagram and a logistic curve to int...

  4. Substrate stiffness affects skeletal myoblast differentiation in vitro

    Directory of Open Access Journals (Sweden)

    Sara Romanazzo, Giancarlo Forte, Mitsuhiro Ebara, Koichiro Uto, Stefania Pagliari, Takao Aoyagi, Enrico Traversa and Akiyoshi Taniguchi

    2012-01-01

    Full Text Available To maximize the therapeutic efficacy of cardiac muscle constructs produced by stem cells and tissue engineering protocols, suitable scaffolds should be designed to recapitulate all the characteristics of native muscle and mimic the microenvironment encountered by cells in vivo. Moreover, so not to interfere with cardiac contractility, the scaffold should be deformable enough to withstand muscle contraction. Recently, it was suggested that the mechanical properties of scaffolds can interfere with stem/progenitor cell functions, and thus careful consideration is required when choosing polymers for targeted applications. In this study, cross-linked poly-ε-caprolactone membranes having similar chemical composition and controlled stiffness in a supra-physiological range were challenged with two sources of myoblasts to evaluate the suitability of substrates with different stiffness for cell adhesion, proliferation and differentiation. Furthermore, muscle-specific and non-related feeder layers were prepared on stiff surfaces to reveal the contribution of biological and mechanical cues to skeletal muscle progenitor differentiation. We demonstrated that substrate stiffness does affect myogenic differentiation, meaning that softer substrates can promote differentiation and that a muscle-specific feeder layer can improve the degree of maturation in skeletal muscle stem cells.

  5. Strength and stiffness capacity utilisation of timber members in roof ...

    African Journals Online (AJOL)

    C Brand Wessels, Nils-Olaf Petersen. Abstract. The main objective of this study was to determine which property, of the six strength and stiffness properties used in structural timber design, was the most influential in the design of nail-plated roof trusses. Thirty recently completed nail-plated roof truss designs were randomly ...

  6. Force and stiffness characteristics of superconducting bearing prototype

    International Nuclear Information System (INIS)

    Matveev, V.; Nizhelskiy, N.; Poluschenko, O.

    2004-01-01

    The radial-axial superconducting bearing prototype was designed, fabricated and tested. The YBaCuO high-temperature superconducting (HTS) monodomain disks diameter 28 mm and thickness of h = 4; 6; 8; 10 mm, capable to trap magnetic field 1 T, were fabricated to be employed in bearing prototype. Force interaction of single field cooled HTS disks with NdFeB magnets depending on disk thickness under 1 mm magnet air gap was studied. It was found that the increase in disk thickness results in reducing radial stiffness and in growing axial one. The results obtained were used for optimization of HTS-PM arrangement, and for developing the bearing design. The designed bearing incorporates a rotor with 7 HTS disks of 4 mm thickness, total mass 90 g, and stator with two pairs of permanent annular magnets of NdFeB. It is established that the force-displacement dependencies of the bearing have three zones: non-hysteresis (elastic) zone with high stiffness up to 560 N/mm; zone of elastic interaction with stiffness 190 N/mm; hysteretic zone with stiffness 150 N/mm in which a rotor residual displacement being observed after unloading. The outer bearing diameter is 130 mm, thickness 30 mm, and mass 1.8 kg. The maximal radial load capacity of the bearing is 190 N at the rotor displacement of 1.3 mm, and the maximal axial load capacity is 85 N at the displacement of 1 mm

  7. Bone metabolism and arterial stiffness after renal transplantation.

    Science.gov (United States)

    Cseprekál, Orsolya; Kis, Eva; Dégi, Arianna A; Kerti, Andrea; Szabó, Attila J; Reusz, György S

    2014-01-01

    To assess the relationship between bone and vascular disease and its changes over time after renal transplantation. Metabolic bone disease (MBD) is common in chronic kidney disease (CKD) and is associated with cardiovascular (CV) disease. Following transplantation (Tx), improvement in CV disease has been reported; however, data regarding changes in bone disease remain controversial. Bone turnover and arterial stiffness (pulse wave velocity (PWV)) were assessed in 47 Tx patients (38 (3-191) months after Tx). Bone alkaline phosphatase (BALP), osteocalcin (OC) and beta-crosslaps were significantly higher in Tx patients, and decreased significantly after one year. There was a negative correlation between BALP, OC and steroid administered (r = -0.35; r = -0.36 respectively). PWV increased in the Tx group (1.15 SD). In patients with a follow up of bone turnover and arterial stiffness are present following kidney transplantation. While bone turnover decreases with time, arterial stiffness correlates initially with bone turnover, after which the influence of cholesterol becomes significant. Non-invasive estimation of bone metabolism and arterial stiffness may help to assess CKD-MBD following renal transplantation.

  8. Stiff person case misdiagnosed as conversion disorder: A case report.

    Science.gov (United States)

    Razmeh, Saeed; Habibi, Amir Hasan; Sina, Farzad; Alizadeh, Elham; Eslami, Monireh

    2017-01-01

    Stiff person syndrome (SPS) is a rare neurological disease resulting in stiffness and spasm of muscles. It initially affects the axial muscles and then spread to limb muscles. Emotional stress exacerbated the symptoms and signs of the disease. The pathophysiology of the disease is caused by the decreased level of the glutamic acid decarboxylase (GAD) activity due to an autoantibody against GAD that decreases the level of gamma-aminobutyric acid (GABA). In this paper, we present a case of atypical presentation of SPS with lower limb stiffness misdiagnosed as conversion disorder. We report a patient with atypical presentation of SPS with lower limb stiffness and gait disorder misdiagnosed as conversion disorder for a year. Her antithyroid peroxidase antibody (anti-TPO Ab) level was 75 IU (normal value: 0-34 IU). Intravenous immunoglobulin (IVIG) was administered (2gr/kg, 5 days) for the patient that showed significant improvement in the follow-up visit. It is essential that in any patient with bizarre gait disorder and suspicious to conversion disorder due to the reversibility of symptoms, SPS and other movement disorder should be considered.

  9. Nanocharacterization of the negative stiffness of ferroelectric materials

    Czech Academy of Sciences Publication Activity Database

    Skandani, A.A.; Čtvrtlík, Radim; Al-Haik, M.

    2014-01-01

    Roč. 105, č. 8 (2014), "082906-1"-"082906-5" ISSN 0003-6951 R&D Projects: GA TA ČR TA03010743 Institutional support: RVO:68378271 Keywords : ferroelectric materials * negative stiffness * thermomechanical environments Subject RIV: JJ - Other Materials Impact factor: 3.302, year: 2014

  10. The conundrum of arterial stiffness, elevated blood pressure, and aging.

    Science.gov (United States)

    AlGhatrif, Majd; Lakatta, Edward G

    2015-02-01

    Isolated systolic hypertension is a major health burden that is expanding with the aging of our population. There is evidence that central arterial stiffness contributes to the rise in systolic blood pressure (SBP); at the same time, central arterial stiffening is accelerated in patients with increased SBP. This bidirectional relationship created a controversy in the field on whether arterial stiffness leads to hypertension or vice versa. Given the profound interdependency of arterial stiffness and blood pressure, this question seems intrinsically challenging, or probably naïve. The aorta's function of dampening the pulsatile flow generated by the left ventricle is optimal within a physiological range of distending pressure that secures the required distal flow, keeps the aorta in an optimal mechanical conformation, and minimizes cardiac work. This homeostasis is disturbed by age-associated, minute alterations in aortic hemodynamic and mechanical properties that induce short- and long-term alterations in each other. Hence, it is impossible to detect an "initial insult" at an epidemiological level. Earlier manifestations of these alterations are observed in young adulthood with a sharp decline in aortic strain and distensibility accompanied by an increase in diastolic blood pressure. Subsequently, aortic mechanical reserve is exhausted, and aortic remodeling with wall stiffening and dilatation ensue. These two phenomena affect pulse pressure in opposite directions and different magnitudes. With early remodeling, there is an increase in pulse pressure, due to the dominance of arterial wall stiffness, which in turn accelerates aortic wall stiffness and dilation. With advanced remodeling, which appears to be greater in men, the effect of diameter becomes more pronounced and partially offsets the effect of wall stiffness leading to plateauing in pulse pressure in men and slower increase in pulse pressure (PP) than that of wall stiffness in women. The complex nature of

  11. The public health value of vaccination for seniors in Europe.

    Science.gov (United States)

    Esposito, Susanna; Franco, Elisabetta; Gavazzi, Gaetan; de Miguel, Angel Gil; Hardt, Roland; Kassianos, George; Bertrand, Isabelle; Levant, Marie-Cécile; Soubeyrand, Benoit; López Trigo, Jose Antonio

    2018-05-03

    Longer life expectancy and decreasing fertility rates mean that the proportion of older people is continually increasing worldwide, and particularly in Europe. Ageing is associated with an increase in the risk and severity of infectious diseases. These diseases are also more difficult to diagnose and manage in seniors who often have at least one comorbid condition (60% of seniors have two or more conditions). Infectious diseases increase the risk of hospitalization, loss of autonomy and death in seniors. Effective vaccines are available in Europe for infectious diseases such as influenza, pneumococcal diseases, herpes zoster, diphtheria, tetanus and pertussis. Their effectiveness has been demonstrated in terms of reducing the rates of hospitalization, disability, dependency and death. The prevention of diseases in seniors also results in savings in healthcare and societal costs each year in Europe. Despite the availability of vaccines, vaccine-preventable diseases affect millions of European citizens annually, with the greatest burden of disease occurring in seniors, and the medical and economic benefits associated with are not being achieved. Vaccination coverage rates must be improved to achieve the full benefits of vaccination of seniors in Europe. Copyright © 2018 Elsevier Ltd. All rights reserved.

  12. Associations between muscle structure and contractile performance in seniors.

    Science.gov (United States)

    Randhawa, Avleen; Wakeling, James M

    2013-07-01

    Changes in muscle structure due to aging occur in a process known as sarcopenia. These changes can alter muscle mechanics during contraction that may limit mobility in seniors. The purpose of this study was to investigate the effect of sarcopenia on muscle fascicle length, pennation and belly thickness in a contracting muscle during isokinetic movements. Fascicles within a pennate muscle shorten at a slower velocity than that of the muscle belly, in a process called belly gearing. Belly gearing may be affected by atrophy and so was also tested in these seniors. The gastrocnemii were tested using ultrasound from 10 young adults (20-40 years) and 9 seniors (70-85 years). The muscle structure was imaged during standing and maximal plantarflexion at four constant velocities on a dynamometer and torque, position and time were recorded during contractions. The muscle belly thickness and pennation in seniors were significantly lower than young adults during standing. Belly thickness, changes in pennation, the belly gearing, ankle torque and power output were all significantly lower in seniors during plantarflexion contractions of the medial gastrocnemius (MG) and lateral gastrocnemius (LG). The higher pennation observed in young adults is commonly associated with increased fascicle rotations during contraction causing an increased belly gearing. The decreased fascicle rotations in seniors resulted in reduced belly gearing but the size of this effect did not match the loss in strength or power from the muscles. Copyright © 2013 Elsevier Ltd. All rights reserved.

  13. Factors Influencing Advancement of Women Senior Leaders in Aerospace Companies

    Science.gov (United States)

    Garrett-Howard, Camille Elaine

    The problem researched in this study was the limited number of women in senior leadership positions in the aerospace industry. The purpose of this qualitative phenomenological research study was to interview women senior leaders in the aerospace industry to explore the factors they perceived as beneficial to their advancement to senior leadership positions in the aerospace industry. The research study was guided by a central research question relating to what professional and personal factors might have led to promotional opportunities into senior leadership roles. Transformational leadership was the conceptual framework used to inform the study. The qualitative, phenomenological approach was selected to gain insights of the lived experiences and perceptions relating to career advancement of women to senior leadership positions in the aerospace industry. Data were collected using a modified Van Kaam method, coded, and analyzed to discern themes or patterns. Findings were that the attributes participants contributed to their success, included a focus on leadership, personal development, and the importance of mentoring relationships. This study presented a positive direction in addressing the gaps in the body of knowledge related to women and leadership development by exploring the experiences of women in senior leadership positions in the aerospace industry. Implications for social change include informing organizations and women about specific leadership development practices as one way to promote more women into leadership positions thus reducing the gap between the number of men and women leaders.

  14. Arterial Stiffness in Nonhypertensive Type 2 Diabetes Patients in Ghana

    Directory of Open Access Journals (Sweden)

    Kwame Yeboah

    2016-01-01

    Full Text Available Background. Increased arterial stiffness is an independent cardiovascular risk factor in diabetes patients and general population. However, the contribution of diabetes to arterial stiffness is often masked by coexistent obesity and hypertension. In this study, we assessed arterial stiffness in nonhypertensive, nonobese type 2 diabetes (T2DM patients in Ghana. Methods. In case-control design, 166 nonhypertensive, nonobese participants, comprising 96 T2DM patients and 70 nondiabetes controls, were recruited. Peripheral and central blood pressure (BP indices were measured, and arterial stiffness was assessed as aortic pulse wave velocity (PWVao, augmentation index (AIx, cardioankle vascular index (CAVI, and heart-ankle pulse wave velocity (haPWV. Results. With similar peripheral and central BP indices, T2DM patients had higher PWVao (8.3 ± 1 versus 7.8 ± 1.3, p=0.044 and CAVI (7.9 ± 1.2 versus 6.9 ± 0.7, p=0.021 than nondiabetic control. AIx and haPWV were similar between T2DM and nondiabetic controls. Multiple regression models showed that, in the entire study participants, the major determinants of PWVao were diabetes status, age, gender, systolic BP, and previous smoking status (β = 0.22, 0.36, 0.48, 0.21, and 0.25, resp.; all p<0.05; the determinants of CAVI were diabetes status, age, BMI, heart rate, HbA1c, total cholesterol, HDL cholesterol, and previous smoking status (β = 0.21, 0.38, 0.2, 0.18, 0.24. 0.2, −0.19, and 0.2, resp.; all p<0.05. Conclusion. Our findings suggest that nonhypertensive, nonobese T2DM patients have increased arterial stiffness without appreciable increase in peripheral and central pressure indices.

  15. Stiffness analysis for the micromagnetic standard problem No. 4

    International Nuclear Information System (INIS)

    Tsiantos, Vassilios D.; Suess, Dieter; Schrefl, Thomas; Fidler, Josef

    2001-01-01

    In this article solutions to micromagnetic standard problem No. 4, a 500-nmx125-nm-wide NiFe film, are presented. A three-dimensional-finite element simulation based on the solution of the Gilbert equation has been used. The simulations show that two different reversal mechanisms occur for the two different applied fields. For a field at 170 degree counterclockwise from the saturation direction there is a nonuniform rotation of magnetization towards the direction of the applied field, with the magnetization at the ends rotating faster than the magnetization in the center. For a field at 190 degree counterclockwise from the saturation direction the magnetization at the ends and in the center rotate in opposite directions leading to the formation of a 360 degree wall after 0.22 ns associated with a peak in the exchange energy. Moreover, the time for the magnetization component parallel to the long axis to cross the zero is 0.136 and 0.135 ns for field 1 and field 2, respectively. The stiffness of the problem has been investigated solving the system of ordinary differential equations with a nonstiff method (Adams) and a stiff one (backward differentiation formula, BDF). For the measure of stiffness the ratio of the total number of time steps (nst) taken by the two solvers, that is nst(Adams)/nst(BDF), has been used. This ratio is 0.784 for field 1 and 0.593 for field 2, which means that the nonstiff method (Adams) uses larger time steps than the stiff method (BDF) and consequently the systems are not stiff. The average time step for the Adams method was 0.2 ps for both fields. [copyright] 2001 American Institute of Physics

  16. Archbishop Porter Girls' Senior High School Students' Perception of Difficult Concepts in Senior High School Further Mathematics Curriculum in Ghana

    OpenAIRE

    Senyefia Bosson-Amedenu

    2017-01-01

    Further Mathematics is frequently perceived as a subject set aside for some exceptional individuals. It often induces feelings of worry; nervousness and panic among students. This study employed the survey research design aimed at investigating difficult concepts in senior secondary school further mathematics curriculum as perceived by students in Archbishop Porter Girls’ Senior High School in Ghana. The study was guided by two research questions and the sample for the study was 100, all of w...

  17. Stiffness Evaluation of High Temperature Superconductor Bearing Stiffness for 10 kWh Superconductor Flywheel Energy Storage System

    International Nuclear Information System (INIS)

    Park, B. J.; Jung, S. Y.; Lee, J. P.; Park, B. C.; Kim, C. H.; Han, S. C.; Du, S. G.; Han, Y. H.; Sung, T. H.

    2009-01-01

    A superconductor flywheel energy storage(SFES) system is mainly act an electro-mechanical battery which transfers mechanical energy into electrical form and vice versa. SFES system consists of a pair of non-contacting High Temperature Superconductor (HTS) bearings with a very low frictional loss. But it is essential to design an efficient HTS bearing considering with rotor dynamic properties through correct calculation of stiffness in order to support a huge composite flywheel rotor with high energy storage density. Static properties of HTS bearings provide data to solve problems which may occur easily in a running system. Since stiffness to counter vibration is the main parameter in designing an HTS bearing system, we investigate HTS bearing magnetic force through static properties between the Permanent Magnet(PM) and HTS. We measured axial / radial stiffness and found bearing stiffness can be easily changed by activated vibration direction between PM and HTS bulk. These results are used to determine the optimal design for a 10 kWh SFES.

  18. A Stewart isolator with high-static-low-dynamic stiffness struts based on negative stiffness magnetic springs

    Science.gov (United States)

    Zheng, Yisheng; Li, Qingpin; Yan, Bo; Luo, Yajun; Zhang, Xinong

    2018-05-01

    In order to improve the isolation performance of passive Stewart platforms, the negative stiffness magnetic spring (NSMS) is employed to construct high static low dynamic stiffness (HSLDS) struts. With the NSMS, the resonance frequencies of the platform can be reduced effectively without deteriorating its load bearing capacity. The model of the Stewart isolation platform with HSLDS struts is presented and the stiffness characteristic of its struts is studied firstly. Then the nonlinear dynamic model of the platform including both geometry nonlinearity and stiffness nonlinearity is established; and its simplified dynamic model is derived under the condition of small vibration. The effect of nonlinearity on the isolation performance is also evaluated. Finally, a prototype is built and the isolation performance is tested. Both simulated and experimental results demonstrate that, by using the NSMS, the resonance frequencies of the Stewart isolator are reduced and the isolation performance in all six directions is improved: the isolation frequency band is increased and extended to a lower-frequency level.

  19. Controlling cyclic stiffness of a foundation, by manipulating the deformation history

    DEFF Research Database (Denmark)

    Sabaliauskas, Tomas; Ibsen, Lars Bo

    2018-01-01

    Offshore wind turbines are slender structures, dynamic response of which depends on foundation stiffness. Unfortunately, foundations embedded in sand can become disturbed, their stiffness can increase and decrease episodically. To investigate the phenomenon governing loss and recovery of stiffnes...

  20. Stiffness Analysis and Comparison of 3-PPR Planar Parallel Manipulators with Actuation Compliance

    DEFF Research Database (Denmark)

    Wu, Guanglei; Bai, Shaoping; Kepler, Jørgen Asbøl

    2012-01-01

    In this paper, the stiffness of 3-PPR planar parallel manipulator (PPM) is analyzed with the consideration of nonlinear actuation compliance. The characteristics of the stiffness matrix pertaining to the planar parallel manipulators are analyzed and discussed. Graphic representation of the stiffn...... of the stiffness characteristics by means of translational and rotational stiffness mapping is developed. The developed method is illustrated with an unsymmetrical 3-PPR PPM, being compared with its structure-symmetrical counterpart....

  1. Correlates of institutionalized senior veterans' quality of life in Taiwan

    Directory of Open Access Journals (Sweden)

    Hwang Shinn-Jang

    2010-07-01

    Full Text Available Abstract Background Senior veterans living in government sponsored, long-term care (LTC facilities, known as veterans' homes (VHs, are a special minority group in Taiwan. These seniors came from different provinces of mainland China during their teenage years at the end of civil wars in 1945. The situation of institutionalized senior veterans shares many characteristics with the concept of "total institution". Very little quality of life (QOL research has involved senior veterans. This study aimed to explore the QOL and related factors of VH-dwelling senior veterans in Taiwan. Methods Chronic conditions and socio-demographic characteristics of 260 male VH residents were recorded. The Brief Form of the World Health Organization's Quality of Life Questionnaire (WHOQOL-BREF, Taiwanese version; Short-Form 36; Inventory of Socially Supportive Behavior questionnaire; Geriatric Depression Scale-short form; Barthel Index; and instrumental activities of daily living were used. Data analyses including descriptive and inferred statistics were performed using SPSS, version 17. Results WHOQOL-BREF showed acceptable reliability in this study. Compared to Taiwanese male norms, WHOQOL-BREF physical, psychological, and social relationship domain scores were around the 25th percentile, and the environment domain was about the 75th percentile. Our participants scored low in all concepts of SF-36. Although these residents rated the social support of their children, relatives, friends, social and medical staff as low, they gave high satisfaction ratings to their social supports. On multiple stepwise linear regression analysis, depressive symptoms, number of chronic conditions, retired military rank, and relatives' support correlated with QOL in both the physical and psychological domains. Friends' support and depressive symptoms correlated with the social relationships domain. Friends' support and instrumental activities of daily living correlated with the

  2. Behavioral problems of seniors in an emergency department.

    Science.gov (United States)

    Erel, Meira; Shapira, Ziva; Volicer, Ladislav

    2013-07-01

    Behavioral disorders are frequent in seniors with cognitive impairments. The ailment responsible for presentation to the Emergency Department (ED), in combination with preexisting conditions, can bring about a temporary cognitive disturbance or worsen an existing cognitive disturbance, thus increasing the frequency of behavioral disorders. The purpose of this research was to investigate whether there is any connection between pain, cognitive impairment, time in the ED, presence or absence of a supportive escort, and behavioral disorders exhibited by a senior. The study sample consisted of 140 seniors aged 69 years and older who visited the ED. Data collected included personal data, presence or absence of an escort, length of stay in the ED, and formal reproducible evaluation of cognition, behavior, and pain. Behavioral disorders were found to be present in 18% of the total sample and in 25% of the group of seniors who suffered from cognitive impairment. The presence of cognitive impairment was found to increase by almost sevenfold the risk of a behavioral disorder. Presence of severe pain increased the risk of a behavioral disorder even more (odds ratio 63). Seniors with cognitive impairment who spent a longer-than-average time period in the ED exhibited behavioral disorders that were more severe than disorders in seniors without cognitive impairment. There was no moderating effect on behavioral disturbances by the presence of a supportive escort observed. The findings of this study suggest that the risk of behavioral disorders in seniors attending the ED may be predicted by screening them for cognitive impairment and pain, and by monitoring the time period they are in the ED. Copyright © 2013 Elsevier Inc. All rights reserved.

  3. Designing a social and assistive robot for seniors.

    Science.gov (United States)

    Eftring, H; Frennert, S

    2016-06-01

    The development of social assistive robots is an approach with the intention of preventing and detecting falls among seniors. There is a need for a relatively low-cost mobile robot with an arm and a gripper which is small enough to navigate through private homes. User requirements of a social assistive robot were collected using workshops, a questionnaire and interviews. Two prototype versions of a robot were designed, developed and tested by senior citizens (n = 49) in laboratory trials for 2 h each and in the private homes of elderly persons (n = 18) for 3 weeks each. The user requirement analysis resulted in a specification of tasks the robot should be able to do to prevent and detect falls. It was a challenge but possible to design and develop a robot where both the senior and the robot arm could reach the necessary interaction points of the robot. The seniors experienced the robot as happy and friendly. They wanted the robot to be narrower so it could pass through narrow passages in the home and they also wanted it to be able to pass over thresholds without using ramps and to drive over carpets. User trials in seniors' homes are very important to acquire relevant knowledge for developing robots that can handle real life situations in the domestic environment. Very high reliability of a robot is needed to get feedback about how seniors experience the overall behavior of the robot and to find out if the robot could reduce falls and improve the feeling of security for seniors living alone.

  4. Differences in Physical Capacity Between Junior and Senior Australian Footballers.

    Science.gov (United States)

    Kelly, Stephen J; Watsford, Mark L; Austin, Damien J; Spurrs, Rob W; Pine, Matthew J; Rennie, Michael J

    2017-11-01

    Kelly, SJ, Watsford, ML, Austin, DJ, Spurrs, RW, Pine, MJ, and Rennie, MJ. Differences in physical capacity between junior and senior Australian footballers. J Strength Cond Res 31(11): 3059-3066, 2017-The purpose of this study was to profile and compare anthropometric and physical capacities within elite junior and senior Australian football (AF) players of various chronological ages and stages of athletic development. Seventy-nine players, including junior and senior AF players from one professional club, were profiled using 11 assessments. Junior players were divided into 2 groups based on chronological age (under 16 and 18 years) and senior players according to years since drafted to a professional AF team (1-2 years, 3-7 years, and 8+ years). Parametric data were assessed using a 1-way analysis of variance (ANOVA), whereas nonparametric data were assessed using a Kruskal-Wallis ANOVA. The magnitude difference between players was measured using the Hopkins' effect size (ES). Significant differences were evident between under-16 players and all senior player groups for anthropometric (p = 0.001-0.019/ES = 1.25-2.13), absolute strength (p = 0.001-0.01/ES = 1.82-4.46), and relative strength (p = 0.001-0.027/ES = 0.84-3.55). The under-18 players displayed significantly lower absolute strength (p = 0.001-0.012/ES = 1.82-3.79) and relative strength (p = 0.001-0.027/ES = 0.85-4.00) compared with the 3-7 and 8+ players. Significant differences were evident between the under-16 players and senior player groups for explosive jumping and throwing tests (p = 0.001-0.017/ES = 1.03-2.99). Minimal differences were evident between all player groups for running assessments; however, the under-16 players were significantly slower compared with the 8+ players for the 3-km time trial (p senior AF players.

  5. Longitudinal relaxation of initially straight flexible and stiff polymers

    Science.gov (United States)

    Dimitrakopoulos, Panagiotis; Dissanayake, Inuka

    2004-11-01

    The present talk considers the relaxation of a single flexible or stiff polymer chain from an initial straight configuration in a viscous solvent. This problem commonly arises when strong flows are turned off in both industrial and biological applications. The problem is also motivated by recent experiments with single biopolymer molecules relaxing after being fully extended by applied forces as well as by the recent development of micro-devices involving stretched tethered biopolymers. Our results are applicable to a wide array of synthetic polymers such as polyacrylamides, Kevlar and polyesters as well as biopolymers such as DNA, actin filaments, microtubules and MTV. In this talk we discuss the mechanism of the polymer relaxation as was revealed through Brownian Dynamics simulations covering a broad range of time scales and chain stiffness. After the short-time free diffusion, the chain's longitudinal reduction at early intermediate times is shown to constitute a universal behavior for any chain stiffness caused by a quasi-steady relaxation of tensions associated with the deforming action of the Brownian forces. Stiff chains are shown to exhibit a late intermediate-time longitudinal reduction associated with a relaxation of tensions affected by the deforming Brownian and the restoring bending forces. The longitudinal and transverse relaxations are shown to obey different laws, i.e. the chain relaxation is anisotropic at all times. In the talk, we show how from the knowledge of the relaxation mechanism, we can predict and explain the polymer properties including the polymer stress and the solution birefringence. In addition, a generalized stress-optic law is derived valid for any time and chain stiffness. All polymer properties which depend on the polymer length are shown to exhibit two intermediate-time behaviors with the early one to constitute a universal behavior for any chain stiffness. This work was supported in part by the Minta Martin Research Fund. The

  6. Optimization of a variable-stiffness skin for morphing high-lift devices

    NARCIS (Netherlands)

    Thuwis, G.A.A.; Abdalla, M.M.; Gürdal, Z.

    2010-01-01

    One of the possibilities for the next generation of smart high-lift devices is to use a seamless morphing structure. A passive composite variable-stiffness skin as a solution to the dilemma of designing the structure to have high enough stiffness to withstand aerodynamic loading and low stiffness to

  7. Comparative numerical solutions of stiff Ordinary differential equations using magnus series expansion method

    Directory of Open Access Journals (Sweden)

    SURE KÖME

    2014-12-01

    Full Text Available In this paper, we investigated the effect of Magnus Series Expansion Method on homogeneous stiff ordinary differential equations with different stiffness ratios. A Magnus type integrator is used to obtain numerical solutions of two different examples of stiff problems and exact and approximate results are tabulated. Furthermore, absolute error graphics are demonstrated in detail.

  8. Source and Message Factors in Persuasion: A Reply to Stiff's Critique of the Elaboration Likelihood Model.

    Science.gov (United States)

    Petty, Richard E.; And Others

    1987-01-01

    Answers James Stiff's criticism of the Elaboration Likelihood Model (ELM) of persuasion. Corrects certain misperceptions of the ELM and criticizes Stiff's meta-analysis that compares ELM predictions with those derived from Kahneman's elastic capacity model. Argues that Stiff's presentation of the ELM and the conclusions he draws based on the data…

  9. Characterizing Axial Stiffness of Individual Batter Piles with Emphasis on Elevated, Laterally Loaded, Clustered Pile Groups

    Science.gov (United States)

    2016-11-01

    using the appropriate stiffness based on the direction of the calculated pile load. 1...load cases. CPGA utilizes the stiffness method (Saul 1968) of three-dimensional pile group analysis for user-specified static loadings. The pile...CPGA analysis and coordinate systems (global and pile) As discussed in Chapter 1, the CPGA software utilizes the stiffness method (Saul 1968) of

  10. Custom 3D Printable Silicones with Tunable Stiffness.

    Science.gov (United States)

    Durban, Matthew M; Lenhardt, Jeremy M; Wu, Amanda S; Small, Ward; Bryson, Taylor M; Perez-Perez, Lemuel; Nguyen, Du T; Gammon, Stuart; Smay, James E; Duoss, Eric B; Lewicki, James P; Wilson, Thomas S

    2018-02-01

    Silicone elastomers have broad versatility within a variety of potential advanced materials applications, such as soft robotics, biomedical devices, and metamaterials. A series of custom 3D printable silicone inks with tunable stiffness is developed, formulated, and characterized. The silicone inks exhibit excellent rheological behavior for 3D printing, as observed from the printing of porous structures with controlled architectures. Herein, the capability to tune the stiffness of printable silicone materials via careful control over the chemistry, network formation, and crosslink density of the ink formulations in order to overcome the challenging interplay between ink development, post-processing, material properties, and performance is demonstrated. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  11. Stiff person syndrome (SPS: Literature review and case report

    Directory of Open Access Journals (Sweden)

    Erna Pretorius

    2013-11-01

    Full Text Available Stiff person syndrome (SPS is a rare, debilitating condition which presents with progressive and inconsistent neurological features. The main symptoms are stiffness and intermittent, painful muscle spasms, triggered and exacerbated by stressful and emotional stimuli. The fluctuating clinical nature of SPS, and otherwise normal neurological examination, often lead to a misdiagnosis of conversion disorder. Psychiatric symptoms frequently accompany this disorder and patients are often first seen by psychiatrists. SPS is autoimmune-based: antibodies are directed against glutamate decarboxylase, resulting in dysregulation of gamma-aminobutyric acid (GABA in the brain which is considered the cause of the neuropsychiatric symptomatology. SPS should be considered in the differential diagnosis of conversion disorder. Effective management requires early detection, a collaborative approach with GABA-ergic medication and intravenous immunoglobulins, and management of concomitant psychiatric disorders. We describe a patient with SPS. Only one other case has been reported in South Africa.

  12. Associations between bicycling and carotid arterial stiffness in adolescents

    DEFF Research Database (Denmark)

    Ried-Larsen, M; Grøntved, A; Østergaard, Lars

    2015-01-01

    Youth Heart Study. Total frequency of bicycle usage was assessed by self-report, and carotid arterial stiffness was assessed using B-mode ultrasound. After adjusting for pubertal status, body height, and objectively measured physical activity and other personal lifestyle and demographic factors, boys......The aim of the study was to investigate the associations between bicycling and carotid arterial stiffness, independent of objectively measured moderate-and-vigorous physical activity. This cross-sectional study included 375 adolescents (age 15.7 ± 0.4 years) from the Danish site of the European...... using their bicycle every day of the week displayed a higher carotid arterial compliance {standard beta 0.47 [95% confidence interval (CI) 0.07-0.87]} and distension [standard beta 0.38 (95% CI -0.04 to 0.81)]. Boys using their bicycle every day of the week furthermore displayed a lower Young's elastic...

  13. INFLUENCE OF PIEZOELECTRIC TRANSDUCER TO GLASS FIBER REINFORCED COMPOSITE STIFFNESS

    Directory of Open Access Journals (Sweden)

    Witold Rządkowski

    2015-08-01

    Full Text Available The main goal was to determine if transducers based on piezoelectric materials are suitable for strain calculations in thin GFRP specimens. Numerous experimental studies, both physical and numerical, performed by the authors, have shown that there is a huge influence of bonded piezoelectric transducer on the overall stiffness of the measured object. The paper presents tensile test performed on strength machine with Digital Image Correlation strain and deflection observations. Test were compared with FEM models for detailed investigation. The main conclusion is piezoelectric transducers has huge influence on local stiffness of measured object. That is critical especially when they are used as strain sensors, when presence of sensor is influencing to measured results.

  14. Strong, tough and stiff bioinspired ceramics from brittle constituents

    Science.gov (United States)

    Bouville, Florian; Maire, Eric; Meille, Sylvain; van de Moortèle, Bertrand; Stevenson, Adam J.; Deville, Sylvain

    2014-05-01

    High strength and high toughness are usually mutually exclusive in engineering materials. In ceramics, improving toughness usually relies on the introduction of a metallic or polymeric ductile phase, but this decreases the material’s strength and stiffness as well as its high-temperature stability. Although natural materials that are both strong and tough rely on a combination of mechanisms operating at different length scales, the relevant structures have been extremely difficult to replicate. Here, we report a bioinspired approach based on widespread ceramic processing techniques for the fabrication of bulk ceramics without a ductile phase and with a unique combination of high strength (470 MPa), high toughness (22 MPa m1/2), and high stiffness (290 GPa). Because only mineral constituents are needed, these ceramics retain their mechanical properties at high temperatures (600 °C). Our bioinspired, material-independent approach should find uses in the design and processing of materials for structural, transportation and energy-related applications.

  15. Computational singular perturbation analysis of stochastic chemical systems with stiffness

    Science.gov (United States)

    Wang, Lijin; Han, Xiaoying; Cao, Yanzhao; Najm, Habib N.

    2017-04-01

    Computational singular perturbation (CSP) is a useful method for analysis, reduction, and time integration of stiff ordinary differential equation systems. It has found dominant utility, in particular, in chemical reaction systems with a large range of time scales at continuum and deterministic level. On the other hand, CSP is not directly applicable to chemical reaction systems at micro or meso-scale, where stochasticity plays an non-negligible role and thus has to be taken into account. In this work we develop a novel stochastic computational singular perturbation (SCSP) analysis and time integration framework, and associated algorithm, that can be used to not only construct accurately and efficiently the numerical solutions to stiff stochastic chemical reaction systems, but also analyze the dynamics of the reduced stochastic reaction systems. The algorithm is illustrated by an application to a benchmark stochastic differential equation model, and numerical experiments are carried out to demonstrate the effectiveness of the construction.

  16. Report summary. Seniors' Falls in Canada: Second Report: key highlights.

    Science.gov (United States)

    Stinchcombe, A; Kuran, N; Powell, S

    2014-07-01

    Injury in Canada is a serious public health concern. Injuries are a leading cause of hospitalization for children, young adults and seniors and a major cause of disability and death. Falls remain the leading cause of injury-related hospitalizations among Canadian seniors, and data from the Canadian Community Health Survey - Healthy Aging indicate that 20% of seniors living in the community reported a fall in the previous year, with a higher prevalence among older seniors, i.e., those aged over 80 years. Falls and associated outcomes not only harm the injured individuals but also affect their families, friends and care providers; they also place considerable pressure on the health care system. However, we do know that these personal and economic costs can be avoided through injury prevention activities. The Seniors' Falls in Canada: Second Report provides policy makers, researchers, community programmers and practitioners with current data and trends on falls, injuries and hospitalizations among Canadian adults aged 65 years and over. This report is intended for use in public health research, policy development and practice.

  17. Factors influencing the transport accessibility level - seniors point of view

    Energy Technology Data Exchange (ETDEWEB)

    Zakowska, L.; Pulawska-Obiedowska, S.

    2016-07-01

    The growing group of European older inhabitants, namely senior citizens (aged + 65) belong to the most vulnerable group to social exclusion. Transport accessibility is a concept, that can lead to enhancing life quality of seniors, which is shown based on the case study of Cracow, Poland as a European city. 100 seniors, that are living in different areas (urban, suburban), were asked for define different aspects that may influence their travel behaviour. Respondents were indicating their individual concerns connected with travelling, the existing barriers and expected solutions.The goal of the paper is to present the main outcomes of the conducted surveys, in order to present the concept of transport accessibility in the context of the most important factors influencing seniors life quality. The accessibility conditions and barriers, which can affect mobility possibilities and different activities of senior citizens in urban areas, are indicated in the paper. The identification of the crucial aspects of accessibility play an important role in development of sustainable transport system together with sustainable urban design, that will be friendly for all citizens in aging society. (Author)

  18. Seniors' views on the use of electronic health records

    Directory of Open Access Journals (Sweden)

    Diane Morin

    2005-06-01

    Full Text Available In the Mauricie and Centre-du-Qu_bec region of the province of Quebec, Canada, an integrated services network has been implemented for frail seniors. It combines three of the best practices in the field of integrated services, namely: single-entry point, case management and personalised care plan. A shared interdisciplinary electronic health record (EHR system was set up in 1998. A consensus on the relevance of using EHRs is growing in Quebec, in Canada and around the world. However, technology has outpaced interest in the notions of confidentiality, informed consent and the impact perceived by the clientele. This study specifically examines how frail seniors perceive these issues related to an EHR. The conceptual framework is inspired by the DeLone and McLean model whose main attributes are: system quality, information quality, utilisation modes and the impact on organisations and individuals. This last attribute is the focus of this study, which is a descriptive with quantitative and qualitative component. Thirty seniors were surveyed. Positive information they provided falls under three headings: (i being better informed; (ii trust and consideration for professionals; and (iii appreciation of innovation. The opinions of the seniors are generally favourable regarding the use of computers and the EHR in their presence. Improvements in EHR systems for seniors can be encouraged.

  19. Passive stiffness of rat skeletal muscle undernourished during fetal development

    Directory of Open Access Journals (Sweden)

    Ana Elisa Toscano

    2010-01-01

    Full Text Available OBJECTIVES: The aim of the study was to investigate the effect of fetal undernutrition on the passive mechanical properties of skeletal muscle of weaned and young adult rats. INTRODUCTION: A poor nutrition supply during fetal development affects physiological functions of the fetus. From a mechanical point of view, skeletal muscle can be also characterized by its resistance to passive stretch. METHODS: Male Wistar rats were divided into two groups according to their mother's diet during pregnancy: a control group (mothers fed a 17% protein diet and an isocaloric low-protein group (mothers fed a 7.8% protein diet. At birth, all mothers received a standardized meal ad libitum. At the age of 25 and 90 days, the soleus muscle and extensor digitorum longus (EDL muscles were removed in order to test the passive mechanical properties. A first mechanical test consisted of an incremental stepwise extension test using fast velocity stretching (500 mm/s enabling us to measure, for each extension stepwise, the dynamic stress (σd and the steady stress (σs. A second test consisted of a slow velocity stretch in order to calculate normalized stiffness and tangent modulus from the stress-strain relationship. RESULTS: The results for the mechanical properties showed an important increase in passive stiffness in both the soleus and EDL muscles in weaned rat. In contrast, no modification was observed in young adult rats. CONCLUSIONS: The increase in passive stiffness in skeletal muscle of weaned rat submitted to intrauterine undernutrition it is most likely due to changes in muscle passive stiffness.

  20. Interfacial free energy and stiffness of aluminum during rapid solidification

    International Nuclear Information System (INIS)

    Brown, Nicholas T.; Martinez, Enrique; Qu, Jianmin

    2017-01-01

    Using molecular dynamics simulations and the capillary fluctuation method, we have calculated the anisotropic crystal-melt interfacial free energy and stiffness of aluminum in a rapid solidification system where a temperature gradient is applied to enforce thermal non-equilibrium. To calculate these material properties, the standard capillary fluctuation method typically used for systems in equilibrium has been modified to incorporate a second-order Taylor expansion of the interfacial free energy term. The result is a robust method for calculating interfacial energy, stiffness and anisotropy as a function of temperature gradient using the fluctuations in the defined interface height. This work includes the calculation of interface characteristics for temperature gradients ranging from 11 to 34 K/nm. The captured results are compared to a thermal equilibrium case using the same model and simulation technique with a zero gradient definition. We define the temperature gradient as the change in temperature over height perpendicular to the crystal-melt interface. The gradients are applied in MD simulations using defined thermostat regions on a stable solid-liquid interface initially in thermal equilibrium. The results of this work show that the interfacial stiffness and free energy for aluminum are dependent on the magnitude of the temperature gradient, however the anisotropic parameters remain independent of the non-equilibrium conditions applied in this analysis. As a result, the relationships of the interfacial free energy/stiffness are determined to be linearly related to the thermal gradient, and can be interpolated to find material characteristics at additional temperature gradients.

  1. Effects of Ramadan fasting on body composition and arterial stiffness.

    Science.gov (United States)

    Sezen, Yusuf; Altiparmak, Ibrahim Halil; Erkus, Muslihittin Emre; Kocarslan, Aydemir; Kaya, Zekeriya; Gunebakmaz, Ozgur; Demirbag, Recep

    2016-12-01

    To examine the effects of Ramadan fasting on body composition, arterial stiffness and resting heart rate. This prospective study was conducted at the Department of Cardiology, Harran University, Sanliurfa, Turkey, during Ramadan 2015, and comprised overweight and obese males. Body composition, arterial stiffness and echocardiography were assessed before and after Ramadan. Body composition was assessed by bioelectrical impedance analysis using segmental body composition analyser. Arterial stiffness and haemodynamic parameters were also measured. SPSS 20 was used for data analysis. Of the 100 subjects enrolled, 70(70%) were included. The overall mean age was 37±7 years. No significant changes were observed in blood pressures, resting heart rate, aortic pulse wave velocity, aortic augmentation index-75, aortic pulse pressure, brachial pulse pressure, basal metabolic rate, total body water, fat-free mass, and echocardiographic parameters (p>0.05 each). Although aortic pulse wave velocity (m/s) and augmentation index-75 (%) decreased after fasting period compared to that of before Ramadan, these reductions did not reach statistically significant levels (8.6±1.8 vs. 8.9±1.9, and 13.6±6.6 vs. 14.7±9.3, respectively; p>0.05 each). Body mass index, waist-hip ratio, body water rate, percentage of body fat mass, body fat mass, and visceral fat mass percentage were significantly reduced (pRamadan. Ramadan fasting had beneficial effects on body composition, but did not have any significant effect on arterial stiffness and resting heart rate.

  2. Influence of facing vertical stiffness on reinforced soil wall design

    OpenAIRE

    Puig Damians, Ivan; Bathurst, Richard; Josa Garcia-Tornel, Alejandro; Lloret Morancho, Antonio

    2013-01-01

    Current design practices for reinforced soil walls typically ignore the influence of facing type and foundation compressibility on the magnitude and distribution of reinforcement loads in steel reinforced soil walls under operational conditions. In this paper, the effect of the facing vertical stiffness (due to elastomeric bearing pads placed in the horizontal joints between panels) on load capacity of steel reinforced soil walls is examined in a systematic manner using a numerical modelli...

  3. Stiffness management of sheet metal parts using laser metal deposition

    Science.gov (United States)

    Bambach, Markus; Sviridov, Alexander; Weisheit, Andreas

    2017-10-01

    Tailored blanks are established solutions for the production of load-adapted sheet metal components. In the course of the individualization of production, such semi-finished products are gaining importance. In addition to tailored welded blanks and tailored rolled blanks, patchwork blanks have been developed which allow a local increase in sheet thickness by welding, gluing or soldering patches onto sheet metal blanks. Patchwork blanks, however, have several limitations, on the one hand, the limited freedom of design in the production of patchwork blanks and, on the other hand, the fact that there is no optimum material bonding with the substrate. The increasing production of derivative and special vehicles on the basis of standard vehicles, prototype production and the functionalization of components require solutions with which semi-finished products and sheet metal components can be provided flexibly with local thickenings or functional elements with a firm metallurgical bond to the substrate. An alternative to tailored and patchwork blanks is, therefore, a free-form reinforcement applied by additive manufacturing via laser metal deposition (LMD). By combining metal forming and additive manufacturing, stiffness can be adapted to the loads based on standard components in a material-efficient manner and without the need to redesign the forming tools. This paper details a study of the potential of stiffness management by LMD using a demonstrator part. Sizing optimization is performed and part distortion is taken into account to find an optimal design for the cladding. A maximum stiffness increase of 167% is feasible with only 4.7% additional mass. Avoiding part distortion leads to a pareto-optimal design which achieves 95% more stiffness with 6% added mass.

  4. Experimental exposure to diesel exhaust increases arterial stiffness in man

    Directory of Open Access Journals (Sweden)

    Newby David E

    2009-03-01

    Full Text Available Abstract Introduction Exposure to air pollution is associated with increased cardiovascular morbidity, although the underlying mechanisms are unclear. Vascular dysfunction reduces arterial compliance and increases central arterial pressure and left ventricular after-load. We determined the effect of diesel exhaust exposure on arterial compliance using a validated non-invasive measure of arterial stiffness. Methods In a double-blind randomized fashion, 12 healthy volunteers were exposed to diesel exhaust (approximately 350 μg/m3 or filtered air for one hour during moderate exercise. Arterial stiffness was measured using applanation tonometry at the radial artery for pulse wave analysis (PWA, as well as at the femoral and carotid arteries for pulse wave velocity (PWV. PWA was performed 10, 20 and 30 min, and carotid-femoral PWV 40 min, post-exposure. Augmentation pressure (AP, augmentation index (AIx and time to wave reflection (Tr were calculated. Results Blood pressure, AP and AIx were generally low reflecting compliant arteries. In comparison to filtered air, diesel exhaust exposure induced an increase in AP of 2.5 mmHg (p = 0.02 and in AIx of 7.8% (p = 0.01, along with a 16 ms reduction in Tr (p = 0.03, 10 minutes post-exposure. Conclusion Acute exposure to diesel exhaust is associated with an immediate and transient increase in arterial stiffness. This may, in part, explain the increased risk for cardiovascular disease associated with air pollution exposure. If our findings are confirmed in larger cohorts of susceptible populations, this simple non-invasive method of assessing arterial stiffness may become a useful technique in measuring the impact of real world exposures to combustion derived-air pollution.

  5. Experimental challenges to stiffness as a transport paradigm

    Science.gov (United States)

    Luce, T. C.; Burrell, K. H.; Holland, C.; Marinoni, A.; Petty, C. C.; Smith, S. P.; Austin, M. E.; Grierson, B. A.; Zeng, L.

    2018-02-01

    Two power scans were carried out in H-mode plasmas in DIII-D; one employed standard co-current neutral beam injection (NBI), while the other used a mixture of co-current and counter-current NBI to scan power while holding the torque to a low fixed value. Analysis of the ion and electron heat transport, ion toroidal angular momentum transport, and thermal deuterium transport from these scans is presented. Invariance of the gradients or gradient scalelengths, as might be expected from stiff transport, was not generally observed. When invariance was seen, it was not accompanied by a strong increase in transport, except in the case of the absolute deuterium ion transport. Conduction in the ion channel is the dominant energy loss mechanism. The variation of the ion heat transport with applied power is similar for the co-injection and fixed torque scans, indicating that E  ×  B shearing is not determining the plasma response to additional power. There is however, a quantitative difference in the transport between the two scans, indicating E  ×  B shearing does play a role in the transport. Comparison of these results with a previous experiment that directly probed stiffness at a single radius leads to the following conclusion: while local stiffness as formally defined may hold, invariance of the gradients or normalized scalelengths does not follow from stiff transport in more practical scaling experiments, such as the power scans discussed here. Possible reasons for the lack of correspondence between the local picture and the global expectations are discussed.

  6. Stiffness and hysteresis properties of some prosthetic feet

    OpenAIRE

    van Jaarsveld, H.W.L.; Grootenboer, H.J.; de Vries, J.; Koopman, Hubertus F.J.M.

    1990-01-01

    A prosthetic foot is an important element of a prosthesis, although it is not always fully recognized that the properties of the foot, along with the prosthetic knee joint and the socket, are in part responsible for the stability and metabolic energy cost during walking. The stiffness and the hysteresis, which are the topics of this paper, are not properly prescribed, but could be adapted to improve the prosthetic walking performance. The shape is strongly related to the cosmetic appearance a...

  7. A method for measuring exchange stiffness in ferromagnetic films

    International Nuclear Information System (INIS)

    Girt, Erol; Huttema, W.; Montoya, E.; Kardasz, B.; Eyrich, C.; Heinrich, B.; Mryasov, O. N.; Dobin, A. Yu.; Karis, O.

    2011-01-01

    An exchange stiffness, A ex , in ferromagnetic films is obtained by fitting the M(H) dependence of two ferromagnetic layers antiferromagnetically coupled across a nonmagnetic spacer layer with a simple micromagnetic model. In epitaxial and textured structures this method allows measuring A ex between the crystallographic planes perpendicular to the growth direction of ferromagnetic films. Our results show that A ex between [0001] planes in textured Co grains is 1.54 ± 0.12 x 10 -11 J/m.

  8. Factors influencing the stiffness of fibroadenomas at shear wave elastography

    International Nuclear Information System (INIS)

    Elseedawy, M.; Whelehan, P.; Vinnicombe, S.; Thomson, K.; Evans, A.

    2016-01-01

    Aim: To identify which features of fibroadenomas are associated with false-positive findings at shear wave elastography (SWE). Materials and methods: A total of 151 patients with histologically confirmed fibroadenomata were identified from a prospective database, from a single breast unit. The following features were assessed by two observers who were unaware of the SWE findings: patient age, grey-scale ultrasound lesion diameter (<15 or ≥15 mm), distance from the lesion to skin, composition of surrounding tissue (fatty, mixed or dense), and source of referral (screening or symptomatic). Statistical analysis was carried out using the chi-square test. Results: A statistically significant positive association was found between grey-scale ultrasound lesion size and lesion stiffness. Twenty-nine of 70 (41%) lesions ≥15 mm were stiff, versus 10 of 81 (12%) <15 mm (p=0.001). Patient age, distance from the lesion to skin, make-up of surrounding tissue, and source were not significantly associated with stiffness. Conclusion: Fibroadenomas giving false-positive SWE results tend to be larger in size than those that do not. More compression of adjacent normal tissue is assumed to be the cause of the present findings. As previous studies have shown that large cancers tend to be stiffer than smaller cancers, it may be appropriate to vary the quantitative cut-off value used for benign/malignant differentiation in SWE according to lesion size. - Highlights: • Fibroadenomas giving false positive SWE results tend to be larger in size. • More compression of adjacent normal tissue is assumed to be the cause of our findings. • The age of the patient is not related to fibroadenoma stiffness.

  9. Running Economy: Neuromuscular and Joint Stiffness Contributions in Trained Runners.

    Science.gov (United States)

    Tam, Nicholas; Tucker, Ross; Santos-Concejero, Jordan; Prins, Danielle; Lamberts, Robert P

    2018-05-29

    It is debated whether running biomechanics make good predictors of running economy, with little known information about the neuromuscular and joint stiffness contributions to economical running gait. The aim of this study was to understand the relationship between certain neuromuscular and spatiotemporal biomechanical factors associated with running economy. Thirty trained runners performed a 6-minute constant-speed running set at 3.3 m∙s -1 , where oxygen consumption was assessed. Overground running trials were also performed at 3.3 m∙s -1 to assess kinematics, kinetics and muscle activity. Spatiotemporal gait variables, joint stiffness, pre-activation and stance phase muscle activity (gluteus medius; rectus femoris (RF); biceps femoris(BF); peroneus longus (PL); tibialis anterior (TA); gastrocnemius lateralis and medius (LG and MG) were variables of specific interest and thus determined. Additionally, pre-activation and ground contact of agonist:antagonist co-activation were calculated. More economical runners presented with short ground contact times (r=0.639, p<0.001) and greater strides frequencies (r=-0.630, p<0.001). Lower ankle and greater knee stiffness were associated with lower oxygen consumption (r=0.527, p=0.007 & r=0.384, p=0.043, respectively). Only LG:TA co-activation during stance were associated with lower oxygen cost of transport (r=0.672, p<0.0001). Greater muscle pre-activation and bi-articular muscle activity during stance were associated with more economical runners. Consequently, trained runners who exhibit greater neuromuscular activation prior to and during ground contact, in turn optimise spatiotemporal variables and joint stiffness, will be the most economical runners.

  10. Analysis of results of surgical treatment of posttraumatic stiff elbow

    Directory of Open Access Journals (Sweden)

    Rex Chandrabose

    2008-01-01

    Full Text Available Background: Surgical management of posttraumatic elbow stiffness has been reported with poor outcome following treatment. Sequential release in earlier stages of stiffness yielded much better results. The goal of our study was to assess the outcome in improvement of the range of motion of the elbow after surgical release and to analyze a tailor-made approach according to individual needs to yield good result. Materials and Methods: A prospective study was conducted in 47 cases of elbow stiffness due to various types of injuries. All the cases were treated with sequential release if there was no progress after adequate supervised conservative management except in unreduced dislocations. All the cases were followed up for a minimum period of 24 months. Overall outcome was rated with the functional scoring system by Mayo Clinic Performance Index. Results: Twenty-five (44.68% out of 47 patients had excellent results with a mean preoperative range of motion of 33.9° and postoperative range of motion of 105° with net gain in range of motion of 71.1° (′ t ′ test value is 19.27, P < 0.01. None of the patients had elbow instability. Patients not having heterotopic ossification, who underwent surgery from three to six months post injury had a mean gain of 73.5°. In patients who waited for more than six months had mean gain of 66.8°. However, the results in cases having heterotopic ossification followed a slightly different pattern. In cases where release was performed from three months to six months had mean gain of 77.5°. Cases in which release was performed after six months had gain of 57.1°. Conclusions: In cases of posttraumatic elbow stiffness after a failed initial conservative treatment, early arthrolysis with sequential surgical soft tissue release yields good result than delayed surgery.

  11. Updating Stiffness and Hysteretic Damping Matrices Using Measured Modal Data

    Directory of Open Access Journals (Sweden)

    Jiashang Jiang

    2018-01-01

    Full Text Available A new direct method for the finite element (FE matrix updating problem in a hysteretic (or material damping model based on measured incomplete vibration modal data is presented. With this method, the optimally approximated stiffness and hysteretic damping matrices can be easily constructed. The physical connectivity of the original model is preserved and the measured modal data are embedded in the updated model. The numerical results show that the proposed method works well.

  12. Updating Stiffness and Hysteretic Damping Matrices Using Measured Modal Data

    OpenAIRE

    Jiashang Jiang; Yongxin Yuan

    2018-01-01

    A new direct method for the finite element (FE) matrix updating problem in a hysteretic (or material) damping model based on measured incomplete vibration modal data is presented. With this method, the optimally approximated stiffness and hysteretic damping matrices can be easily constructed. The physical connectivity of the original model is preserved and the measured modal data are embedded in the updated model. The numerical results show that the proposed method works well.

  13. Arterial stiffness, central hemodynamics, and cardiovascular risk in hypertension

    Science.gov (United States)

    Palatini, Paolo; Casiglia, Edoardo; Gąsowski, Jerzy; Głuszek, Jerzy; Jankowski, Piotr; Narkiewicz, Krzysztof; Saladini, Francesca; Stolarz-Skrzypek, Katarzyna; Tikhonoff, Valérie; Van Bortel, Luc; Wojciechowska, Wiktoria; Kawecka-Jaszcz, Kalina

    2011-01-01

    This review summarizes several scientific contributions at the recent Satellite Symposium of the European Society of Hypertension, held in Milan, Italy. Arterial stiffening and its hemodynamic consequences can be easily and reliably measured using a range of noninvasive techniques. However, like blood pressure (BP) measurements, arterial stiffness should be measured carefully under standardized patient conditions. Carotid-femoral pulse wave velocity has been proposed as the gold standard for arterial stiffness measurement and is a well recognized predictor of adverse cardiovascular outcome. Systolic BP and pulse pressure in the ascending aorta may be lower than pressures measured in the upper limb, especially in young individuals. A number of studies suggest closer correlation of end-organ damage with central BP than with peripheral BP, and central BP may provide additional prognostic information regarding cardiovascular risk. Moreover, BP-lowering drugs can have differential effects on central aortic pressures and hemodynamics compared with brachial BP. This may explain the greater beneficial effect provided by newer antihypertensive drugs beyond peripheral BP reduction. Although many methodological problems still hinder the wide clinical application of parameters of arterial stiffness, these will likely contribute to cardiovascular assessment and management in future clinical practice. Each of the abovementioned parameters reflects a different characteristic of the atherosclerotic process, involving functional and/or morphological changes in the vessel wall. Therefore, acquiring simultaneous measurements of different parameters of vascular function and structure could theoretically enhance the power to improve risk stratification. Continuous technological effort is necessary to refine our methods of investigation in order to detect early arterial abnormalities. Arterial stiffness and its consequences represent the great challenge of the twenty-first century for

  14. Brain tissue stiffness is a sensitive marker for acidosis.

    Science.gov (United States)

    Holtzmann, Kathrin; Gautier, Hélène O B; Christ, Andreas F; Guck, Jochen; Káradóttir, Ragnhildur Thóra; Franze, Kristian

    2016-09-15

    Carbon dioxide overdose is frequently used to cull rodents for tissue harvesting. However, this treatment may lead to respiratory acidosis, which potentially could change the properties of the investigated tissue. Mechanical tissue properties often change in pathological conditions and may thus offer a sensitive generic readout for changes in biological tissues with clinical relevance. In this study, we performed force-indentation measurements with an atomic force microscope on acute cerebellar slices from adult rats to test if brain tissue undergoes changes following overexposure to CO2 compared to other methods of euthanasia. The pH significantly decreased in brain tissue of animals exposed to CO2. Concomitant with the drop in pH, cerebellar grey matter significantly stiffened. Tissue stiffening was reproduced by incubation of acute cerebellar slices in acidic medium. Tissue stiffness provides an early, generic indicator for pathophysiological changes in the CNS. Atomic force microscopy offers unprecedented high spatial resolution to detect such changes. Our results indicate that the stiffness particularly of grey matter strongly correlates with changes of the pH in the cerebellum. Furthermore, the method of tissue harvesting and preparation may not only change tissue stiffness but very likely also other physiologically relevant parameters, highlighting the importance of appropriate sample preparation. Copyright © 2016 The Authors. Published by Elsevier B.V. All rights reserved.

  15. Stiffness compatibility of coralline hydroxyapatite bone substitute under dynamic loading

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    When hydroxyapatite bone substitutes are implanted in human bodies,bone tissues will grow into their porous structure,which will reinforce their strength and stiffness.The concept of mechanical com-patibility of bone substitutes implies that their mechanical properties are similar to the bone tissues around,as if they were part of the bone.The mechanical compatibility of bone substitutes includes both static and dynamic behavior,due to the mechanical properties of bone depending on the strain rate.In this study,split Hopkinson pressure bar technique(SHPB) was employed to determine the dy-namic mechanical properties of coralline hydroxyapatite,bones with and bones without organic com-ponents,and their dynamic stress-strain curves of the three materials were obtained.The mechanical effects of collagens in bone were assessed,by comparing the difference between the Young’s moduli of the three materials.As the implanted bone substitute becomes a part of bone,it can be regarded as an inclusion composite.The effective modulus of the composite was also evaluated in order to estimate its mechanical compatibility on stiffness.The evaluated result shows that the suitable porosity of HA is 0.8,which is in favor of both static and dynamic stiffness compatibility.

  16. Stiffness compatibility of coralline hydroxyapatite bone substitute under dynamic loading

    Institute of Scientific and Technical Information of China (English)

    REN ChaoFeng; HOU ZhenDe; ZHAO Wei

    2009-01-01

    When hydroxyapatite bone substitutes are implanted in human bodies, bone tissues will grow into their porous structure, which will reinforce their strength and stiffness. The concept of mechanical com-patibility of bone substitutes implies that their mechanical properties are similar to the bone tissues around, as if they were part of the bone. The mechanical compatibility of bone substitutes includes both static and dynamic behavior, due to the mechanical properties of bone depending on the strain rate. In this study, split Hopkinson pressure bar technique (SHPB) was employed to determine the dy-namic mechanical properties of coralline hydroxyapatite, bones with and bones without organic com-ponents, and their dynamic stress-strain curves of the three materials were obtained. The mechanical effects of collagens in bone were assessed, by comparing the difference between the Young's moduli of the three materials. As the implanted bone substitute becomes a part of bone, it can be regarded as an inclusion composite. The effective modulus of the composite was also evaluated in order to estimate its mechanical compatibility on stiffness. The evaluated result shows that the suitable porosity of HA is0.8, which is in favor of both static and dynamic stiffness compatibility.

  17. Strength and stiffness reduction factors for infilled frames with openings

    Science.gov (United States)

    Decanini, Luis D.; Liberatore, Laura; Mollaioli, Fabrizio

    2014-09-01

    Framed structures are usually infilled with masonry walls. They may cause a significant increase in both stiffness and strength, reducing the deformation demand and increasing the energy dissipation capacity of the system. On the other hand, irregular arrangements of the masonry panels may lead to the concentration of damage in some regions, with negative effects; for example soft story mechanisms and shear failures in short columns. Therefore, the presence of infill walls should not be neglected, especially in regions of moderate and high seismicity. To this aim, simple models are available for solid infills walls, such as the diagonal no-tension strut model, while infilled frames with openings have not been adequately investigated. In this study, the effect of openings on the strength and stiffness of infilled frames is investigated by means of about 150 experimental and numerical tests. The main parameters involved are identified and a simple model to take into account the openings in the infills is developed and compared with other models proposed by different researchers. The model, which is based on the use of strength and stiffness reduction factors, takes into account the opening dimensions and presence of reinforcing elements around the opening. An example of an application of the proposed reduction factors is also presented.

  18. Origami tubes assembled into stiff, yet reconfigurable structures and metamaterials.

    Science.gov (United States)

    Filipov, Evgueni T; Tachi, Tomohiro; Paulino, Glaucio H

    2015-10-06

    Thin sheets have long been known to experience an increase in stiffness when they are bent, buckled, or assembled into smaller interlocking structures. We introduce a unique orientation for coupling rigidly foldable origami tubes in a "zipper" fashion that substantially increases the system stiffness and permits only one flexible deformation mode through which the structure can deploy. The flexible deployment of the tubular structures is permitted by localized bending of the origami along prescribed fold lines. All other deformation modes, such as global bending and twisting of the structural system, are substantially stiffer because the tubular assemblages are overconstrained and the thin sheets become engaged in tension and compression. The zipper-coupled tubes yield an unusually large eigenvalue bandgap that represents the unique difference in stiffness between deformation modes. Furthermore, we couple compatible origami tubes into a variety of cellular assemblages that can enhance mechanical characteristics and geometric versatility, leading to a potential design paradigm for structures and metamaterials that can be deployed, stiffened, and tuned. The enhanced mechanical properties, versatility, and adaptivity of these thin sheet systems can provide practical solutions of varying geometric scales in science and engineering.

  19. Photoplethysmographic signal waveform index for detection of increased arterial stiffness

    International Nuclear Information System (INIS)

    Pilt, K; Meigas, K; Ferenets, R; Temitski, K; Viigimaa, M

    2014-01-01

    The aim of this research was to assess the validity of the photoplethysmographic (PPG) waveform index PPGAI for the estimation of increased arterial stiffness. For this purpose, PPG signals were recorded from 24 healthy subjects and from 20 type II diabetes patients. The recorded PPG signals were processed with the analysis algorithm developed and the waveform index PPGAI similar to the augmentation index (AIx) was calculated. As a reference, the aortic AIx was assessed and normalized for a heart rate of 75 bpm (AIx@75) by a SphygmoCor device. A strong correlation (r = 0.85) between the PPGAI and the aortic AIx@75 and a positive correlation of both indices with age were found. Age corrections for the indices PPGAI and AIx@75 as regression models from the signals of healthy subjects were constructed. Both indices revealed a significant difference between the groups of diabetes patients and healthy controls. However, the PPGAI provided the best statistical discrimination for the group of subjects with increased arterial stiffness. The waveform index PPGAI based on the inexpensive PPG technology can be considered as a perspective measure of increased arterial stiffness estimation in clinical screenings. (paper)

  20. Helical growth trajectories in plant roots interacting with stiff barriers

    Science.gov (United States)

    Gerbode, Sharon; Noar, Roslyn; Harrison, Maria

    2009-03-01

    Plant roots successfully navigate heterogeneous soil environments with varying nutrient and water concentrations, as well as a variety of stiff obstacles. While it is thought that the ability of roots to penetrate into a stiff lower soil layer is important for soil erosion, little is known about how a root actually responds to a rigid interface. We have developed a laser sheet imaging technique for recording the 3D growth dynamics of plant roots interacting with stiff barriers. We find that a root encountering an angled interface does not grow in a straight line along the surface, but instead follows a helical trajectory. These experiments build on the pioneering studies of roots grown on a tilted 2D surface, which reported ``root waving,'' a similar curved pattern thought to be caused by the root's sensitivity to both gravity and the rigid surface on which it is grown. Our measurements extend these results to the more physiologically relevant case of 3D growth, where the spiral trajectory can be altered by tuning the relative strengths of the gravity and touch stimuli, providing some intuition for the physical mechanism driving it.

  1. Weight reduction and aortic stiffness in obese children and adolescents

    DEFF Research Database (Denmark)

    Hvidt, K. N.; Olsen, M. H.; Ibsen, H.

    2015-01-01

    Little is known about the effect of weight reduction on aortic stiffness and especially so in the young. The present study investigates whether weight reduction influences aortic stiffness in obese children and adolescents. Carotid-femoral pulse wave velocity (cfPWV) and augmentation index at heart...... was found in AIx@HR75 (Delta AIx@HR75: 2.10 +/- 9.73%, P = 0.072), but changes in AIx@HR75 were related to changes in abdominal fat (Delta waist/height ratio: beta = 50.3, 95% CI 6.7-94.0, P = 0.02) and changes in total body fat percent by dual energy X-ray absorptiometry scan (Delta total body fat...... (%): beta = 0.7, 95% CI 0.1-1.3, P = 0.02) when adjusted for gender and relevant baseline confounders. In conclusion, no clear effect of weight reduction was found on aortic stiffness, although changes in AIx@HR75 were associated with changes in both abdominal fat and total body fat percent. The higher cf...

  2. Assessment of clay stiffness and strength parameters using index properties

    Directory of Open Access Journals (Sweden)

    Sayed M. Ahmed

    2018-06-01

    Full Text Available A new approach is developed to determine the shear wave velocity in saturated soft to firm clays using measurements of the liquid limit, plastic limit, and natural water content with depth. The shear wave velocity is assessed using the site-specific variation of the natural water content with the effective mean stress. Subsequently, an iterative process is envisaged to obtain the clay stiffness and strength parameters. The at-rest earth pressure coefficient, as well as bearing capacity factor and rigidity index related to the cone penetration test, is also acquired from the analyses. Comparisons are presented between the measured clay parameters and the results of corresponding analyses in five different case studies. It is demonstrated that the presented approach can provide acceptable estimates of saturated clay stiffness and strength parameters. One of the main privileges of the presented methodology is the site-specific procedure developed based on the relationships between clay strength and stiffness parameters, rather than adopting direct correlations. Despite of the utilized iterative processes, the presented approach can be easily implemented using a simple spreadsheet, benefiting both geotechnical researchers and practitioners. Keywords: Soft to firm clays, Atterberg limits, Shear wave velocity, Small-strain shear modulus, Constrained modulus, Undrained shear strength, Effective friction angle, Cone penetration test

  3. Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

    Directory of Open Access Journals (Sweden)

    Andualem Tadesse Maereg

    2017-09-01

    Full Text Available In this paper, we discuss the development of cost effective, wireless, and wearable vibrotactile haptic device for stiffness perception during an interaction with virtual objects. Our experimental setup consists of haptic device with five vibrotactile actuators, virtual reality environment tailored in Unity 3D integrating the Oculus Rift Head Mounted Display (HMD and the Leap Motion controller. The virtual environment is able to capture touch inputs from users. Interaction forces are then rendered at 500 Hz and fed back to the wearable setup stimulating fingertips with ERM vibrotactile actuators. Amplitude and frequency of vibrations are modulated proportionally to the interaction force to simulate the stiffness of a virtual object. A quantitative and qualitative study is done to compare the discrimination of stiffness on virtual linear spring in three sensory modalities: visual only feedback, tactile only feedback, and their combination. A common psychophysics method called the Two Alternative Forced Choice (2AFC approach is used for quantitative analysis using Just Noticeable Difference (JND and Weber Fractions (WF. According to the psychometric experiment result, average Weber fraction values of 0.39 for visual only feedback was improved to 0.25 by adding the tactile feedback.

  4. Seniority in quantum many-body systems. I. Identical particles in a single shell

    Energy Technology Data Exchange (ETDEWEB)

    Van Isacker, P., E-mail: isacker@ganil.fr [Grand Accélérateur National d’Ions Lourds, CEA/DSM–CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5 (France); Heinze, S. [Institut für Kernphysik der Universität zu Köln, 50937 Köln (Germany)

    2014-10-15

    A discussion of the seniority quantum number in many-body systems is presented. The analysis is carried out for bosons and fermions simultaneously but is restricted to identical particles occupying a single shell. The emphasis of the paper is on the possibility of partial conservation of seniority which turns out to be a peculiar property of spin-9/2 fermions but prevalent in systems of interacting bosons of any spin. Partial conservation of seniority is at the basis of the existence of seniority isomers, frequently observed in semi-magic nuclei, and also gives rise to peculiar selection rules in one-nucleon transfer reactions. - Highlights: • Unified derivation of conditions for the total and partial conservation of seniority. • General analysis of the partial conservation of seniority in boson systems. • Why partial conservation of seniority is crucial for seniority isomers in nuclei. • The effect of partial conservation of seniority on one-nucleon transfer intensities.

  5. Seniority in quantum many-body systems. I. Identical particles in a single shell

    International Nuclear Information System (INIS)

    Van Isacker, P.; Heinze, S.

    2014-01-01

    A discussion of the seniority quantum number in many-body systems is presented. The analysis is carried out for bosons and fermions simultaneously but is restricted to identical particles occupying a single shell. The emphasis of the paper is on the possibility of partial conservation of seniority which turns out to be a peculiar property of spin-9/2 fermions but prevalent in systems of interacting bosons of any spin. Partial conservation of seniority is at the basis of the existence of seniority isomers, frequently observed in semi-magic nuclei, and also gives rise to peculiar selection rules in one-nucleon transfer reactions. - Highlights: • Unified derivation of conditions for the total and partial conservation of seniority. • General analysis of the partial conservation of seniority in boson systems. • Why partial conservation of seniority is crucial for seniority isomers in nuclei. • The effect of partial conservation of seniority on one-nucleon transfer intensities

  6. Hybrid-Aware Model for Senior Wellness Service in Smart Home.

    Science.gov (United States)

    Jung, Yuchae

    2017-05-22

    Smart home technology with situation-awareness is important for seniors to improve safety and security. With the development of context-aware computing, wearable sensor technology, and ubiquitous computing, it is easier for seniors to manage their health problem in smart home environment. For monitoring senior activity in smart home, wearable, and motion sensors-such as respiration rate (RR), electrocardiography (ECG), body temperature, and blood pressure (BP)-were used for monitoring movements of seniors. For context-awareness, environmental sensors-such as gas, fire, smoke, dust, temperature, and light sensors-were used for senior location data collection. Based on senior activity, senior health status can be classified into positive and negative. Based on senior location and time, senior safety is classified into safe and emergency. In this paper, we propose a hybrid inspection service middleware for monitoring elderly health risk based on senior activity and location. This hybrid-aware model for the detection of abnormal status of seniors has four steps as follows: (1) data collection from biosensors and environmental sensors; (2) monitoring senior location and time of stay in each location using environmental sensors; (3) monitoring senior activity using biometric data; finally, (4) expectation-maximization based decision-making step recommending proper treatment based on a senior health risk ratio.

  7. HEADMASTER POLICY OF SENIOR ISLAMIC SCHOOL TO INCREAS TEACHER PROFESIONALISM AT STATE SENIOR ISLAMIC SCHOOL 2 MODEL MEDAN

    Directory of Open Access Journals (Sweden)

    Muhammad Arifin Tanjung

    2017-09-01

    Full Text Available State Senior Islamic School 2 Model Medan oh of famous Islamic schools in North Sumatera. The issues in this writing are what are the formulation, organization, application, and evaluation of headmaster Policy of Senior Islamic School to Increase Teacher Professionalism at State Senior Islamic School 2 Model Medan. To explain the main issue in this writings, I have to observe and interview the Moslem population. Data has been collected will be explained detailly and analyzed by Islamic education management. Based on research, formulation of headmaster Policy of Senior Islamic School to Increase Teacher Professionalism at State Senior Islamic School 2 Model Medan is bottom up which ideas from teachers, beginning from teachers meeting in one subject, teachers meeting in one program, annual meeting in a month and annual meeting in a year, and finally in teamwork, for example, anual teachers meeting, seminar, workshop, coffee morning, study comparison to university and another school. It will motivate teacher in teaching, activity, and anything. Besides it, headmaster facilitates everything whatever teacher need it, for example, infocus, laptop, and everything. And the organization of headmaster Policy of Senior Islamic School to Increase Teacher Professionalism at State Senior Islamic School 2 Model Medan is cooperation with the school community and he helped by vices and head program and teachers and chairman of the student. The special of school organization is evaluation of teachers activity and relation to abroad. Headmaster states his position as a teacher who teaches students, a leader who leads teachers, a manager who manages, a motivator who motivate, a supervisor who supervise teachers activity, and facilitator for teachers. And finally evaluation of headmaster Policy of Senior Islamic School to Increase the Teacher Professionalism at State Senior Islamic School 2 Model Medan each level, beginning from teachers meeting in one subject

  8. User interaction in smart ambient environment targeted for senior citizen.

    Science.gov (United States)

    Pulli, Petri; Hyry, Jaakko; Pouke, Matti; Yamamoto, Goshiro

    2012-11-01

    Many countries are facing a problem when the age-structure of the society is changing. The numbers of senior citizen are rising rapidly, and caretaking personnel numbers cannot match the problems and needs of these citizens. Using smart, ubiquitous technologies can offer ways in coping with the need of more nursing staff and the rising costs of taking care of senior citizens for the society. Helping senior citizens with a novel, easy to use interface that guides and helps, could improve their quality of living and make them participate more in daily activities. This paper presents a projection-based display system for elderly people with memory impairments and the proposed user interface for the system. The user's process recognition based on a sensor network is also described. Elderly people wearing the system can interact the projected user interface by tapping physical surfaces (such as walls, tables, or doors) using them as a natural, haptic feedback input surface.

  9. Physiological profile of senior and junior England international amateur boxers.

    Science.gov (United States)

    Smith, Marcus S

    2006-01-01

    Despite worldwide popularity of amateur boxing, research focussed on the physiological demands of the sport is limited. The physiological profile of Senior and Junior England international amateur boxers is presented. A gradual (8 to 21-days) and rapid (0 to 7-days) phase of body weight reduction was evident with 2.2 ± 0.3 % of the 7.0 ± 0. 8 % weight loss occurring over the final 24-hours. An increase in body weight >4% was observed following a recovery period. High urine osmolality values (> 1000 mOsm·kg(-1)) were recorded during training and competition. High post-competition blood lactate values (>13.5 mmol·l(-1)) highlighted the need for a well-developed anaerobic capacity and the importance of not entering the ring in a glycogen depleted state. The aerobic challenge of competition was demonstrated by maximum heart rate values being recorded during 'Open' sparring. Mean body fat values of 9-10% were similar to those reported for other weight classified athletes. Normal resting values were reported for hematocrit (Senior 48 ± 2 % and Junior 45 ± 2 %), haemoglobin (Senior 14.7 ± 1.0 g·dl(-1) and Junior 14.5 ± 0.8 g·dl(-1)), bilirubin (Senior 15.3 ± 6.2 µmol·l-1(-1)) and ferritin (Senior 63.3 ± 45.7 ng·ml(-1)). No symptoms associated with asthma or exercise-induced asthma was evident. A well- developed aerobic capacity was reflected in the Senior VO2max value of 63.8 ± 4.8 ml·kg(-1)·min(-1). Senior lead hand straight punching force (head 1722 ± 700 N and body 1682 ± 636 N) was lower than the straight rear hand (head 2643 ± 1273 N and body 2646 ± 1083 N), lead hook (head 2412 ± 813 N and body 2414 ± 718 N) and rear hook (head 2588 ± 1040 N and body 2555 ± 926 N). It was concluded that amateur boxing performance is dependent on the interplay between anaerobic and aerobic energy systems. Current weight making methods may lead to impaired substrate availability, leading to reduced competitive performance and an increased risk to a boxers

  10. Augmenting Everyday Artefacts to Support Social Interaction Among Senior Peers

    DEFF Research Database (Denmark)

    Nazzi, Elena; Sokoler, Tomas

    2015-01-01

    Novel technological possibilities emerge when tangible and social computing come together. This paper explores the potential of such technology when designing for seniors and their social interaction. Our research is guided by the concept of twitterIDo, which is to make seniors’ everyday activities...... and displays designed to start a dialogue with the seniors on how twitterIDo-technology may fit into their everyday situations. Our findings point out how augmented everyday artefacts can make a positive difference when designing technology in a domain such the one of seniors’ and their social interaction...... more visible by augmenting everyday artefacts to communicate the ongoing activity they are used for. We engaged a local community of seniors in a living lab to explore the possibilities of twitterIDo in real life situations. This paper presents a series of interactive prototypes of everyday artefacts...

  11. Developing brokered community transportation for seniors and people with disabilities.

    Science.gov (United States)

    Marx, Jerry; Davis, Christie; Miftari, Caitlin; Salamone, Anne; Weise, Wendy

    2010-01-01

    Communities are exploring ways to increase transportation coordination to improve access for seniors. One such effort is a brokered transportation system in which one agency serves as the central point of contact for ride information or actually arranging transportation for clients of multiple programs by use of a combination of transportation services. A team of social work faculty and students from the University of New Hampshire (UNH) Social Work Outreach Center, a center that provides service learning opportunities to students, collaborated with a local coalition to investigate the specific transportation needs of the region's senior citizens. A total of 641 people participated in the survey. Results indicate that the study population experiences problems reliably meeting daily living needs due to inconsistent or unavailable private and public transportation options. Study findings also indicate the promising potential of brokered transportation systems, particularly for isolated seniors in rural and suburban areas with relatively limited public and private transportation options.

  12. Managerial competence at senior levels of integrated delivery systems.

    Science.gov (United States)

    Longest, B B

    1998-01-01

    The advent of integrated delivery systems (IDSs) in the healthcare industry has changed much about the work involved in running many healthcare organizations. As a result of these changes, senior healthcare managers in IDSs need different skills and knowledge (competencies) than managers of other healthcare systems. The work of managers is changed by the shift to more organizational integration in the healthcare industry because they become responsible for coordinated continuation of services, accountable for the overall health status of the populations they serve, and involved in more complex organizational structures. The article identifies six distinct managerial competencies--conceptual, technical managerial/clinical, interpersonal/collaborative, political, commercial, and governance--and describes how they relate to an IDS senior manager's successful work performance. The implications of these competencies are considered for practicing senior managers in IDSs, as well as those who aspire to such positions, and those who help educate them.

  13. Social Inclusion of Senior Citizens by a Teleoperated Android

    DEFF Research Database (Denmark)

    Yamazaki, Ryuji; Nishio, Shuichi; Ishiguro, Hiroshi

    As populations continue to age, there is a growing need for assistive technologies that help senior citizens maintain their autonomy and enjoy their lives. We explore the potential of teleoperated androids, which are embodied telecommunication media with humanlike appearances. Our exploratory study...... focused on the social aspects of Telenoid, a teleoperated android designed as a minimalistic human, which might facilitate communica- tion between senior citizens and its operators. We con- ducted cross-cultural field trials in Japan and Denmark by introducing Telenoid into care facilities and the pri......- vate homes of seniors to observe how they responded to it. In Japan, we set up a teleoperation system in an elemen- tary school and investigated how it shaped communica- tion through the internet between the elderly in a care facility and the children who acted as teleoperators. In both countries...

  14. Citation ranking versus peer evaluation of senior faculty research performance

    DEFF Research Database (Denmark)

    Meho, Lokman I.; Sonnenwald, Diane H.

    2000-01-01

    The purpose of this study is to analyze the relationship between citation ranking and peer evaluation in assessing senior faculty research performance. Other studies typically derive their peer evaluation data directly from referees, often in the form of ranking. This study uses two additional...... indicator of research performance of senior faculty members? Citation data, book reviews, and peer ranking were compiled and examined for faculty members specializing in Kurdish studies. Analysis shows that normalized citation ranking and citation content analysis data yield identical ranking results....... Analysis also shows that normalized citation ranking and citation content analysis, book reviews, and peer ranking perform similarly (i.e., are highly correlated) for high-ranked and low-ranked senior scholars. Additional evaluation methods and measures that take into account the context and content...

  15. A comparison of muscle stiffness and musculoarticular stiffness of the knee joint in young athletic males and females.

    Science.gov (United States)

    Wang, Dan; De Vito, Giuseppe; Ditroilo, Massimiliano; Fong, Daniel T P; Delahunt, Eamonn

    2015-06-01

    The objective of this study was to investigate the gender-specific differences in peak torque (PT), muscle stiffness (MS) and musculoarticular stiffness (MAS) of the knee joints in a young active population. Twenty-two male and twenty-two female recreational athletes participated. PT of the knee joint extensor musculature was assessed on an isokinetic dynamometer, MS of the vastus lateralis (VL) muscle was measured in both relaxed and contracted conditions, and knee joint MAS was quantified using the free oscillation technique. Significant gender differences were observed for all dependent variables. Females demonstrated less normalized PT (mean difference (MD)=0.4Nm/kg, p=0.005, η(2)=0.17), relaxed MS (MD=94.2N/m, pjoint injury incidence and prevalence in females when compared to males. Copyright © 2015 Elsevier Ltd. All rights reserved.

  16. Fitness as a determinant of arterial stiffness in healthy adult men: a cross-sectional study.

    Science.gov (United States)

    Chung, Jinwook; Kim, Milyang; Jin, Youngsoo; Kim, Yonghwan; Hong, Jeeyoung

    2018-01-01

    Fitness is known to influence arterial stiffness. This study aimed to assess differences in cardiorespiratory endurance, muscular strength, and flexibility according to arterial stiffness, based on sex and age. We enrolled 1590 healthy adults (men: 1242, women: 348) who were free of metabolic syndrome. We measured cardiorespiratory endurance in an exercise stress test on a treadmill, muscular strength by a grip test, and flexibility by upper body forward-bends from a standing position. The brachial-ankle pulse wave velocity test was performed to measure arterial stiffness before the fitness test. Cluster analysis was performed to divide the patients into groups with low (Cluster 1) and high (Cluster 2) arterial stiffness. According to the k-cluster analysis results, Cluster 1 included 624 men and 180 women, and Cluster 2 included 618 men and 168 women. Men in the middle-aged group with low arterial stiffness demonstrated higher cardiorespiratory endurance, muscular strength, and flexibility than those with high arterial stiffness. Similarly, among men in the old-aged group, the cardiorespiratory endurance and muscular strength, but not flexibility, differed significantly according to arterial stiffness. Women in both clusters showed similar cardiorespiratory endurance, muscular strength, and flexibility regardless of their arterial stiffness. Among healthy adults, arterial stiffness was inversely associated with fitness in men but not in women. Therefore, fitness seems to be a determinant for arterial stiffness in men. Additionally, regular exercise should be recommended for middle-aged men to prevent arterial stiffness.

  17. Effects of mechanical properties and geometric conditions on stiffness of Hyperboloid Shallow Shell

    Directory of Open Access Journals (Sweden)

    Zhao Lihong

    2015-01-01

    Full Text Available The experiment models based on the hyperboloid shallow shells that represent automobile panel's surface features are established. The effects of material properties and geometric conditions condition on the stiffness of hyperboloid shallow shell are investigated experimentally. The influences of panel thickness and geometric conditions on stiffness are very obvious. Stiffness increases with increasing of the panel thickness, and stiffness doubled as increasing in thickness with 0.1 mm. The effect of thickness on stiffness is far greater than that of blank holding force. The greater the arc height of punch, the greater the stiffness. And stiffness increases nearly by five times with arc height of punch is from 3mm to 9mm. The effect of arc height of punch on stiffness is far greater than that of materials mechanical properties. The stiffness is varied with different panel material properties by the same forming and stiffness test conditions. The decrease of yield strength is beneficial to the panel stiffness. The appropriate choice of materials and forming process condition is important in meeting necessary requirements for the energy-saving, lightweight and reducing wind resistance design in automotive industry.

  18. An acoustic startle alters knee joint stiffness and neuromuscular control.

    Science.gov (United States)

    DeAngelis, A I; Needle, A R; Kaminski, T W; Royer, T R; Knight, C A; Swanik, C B

    2015-08-01

    Growing evidence suggests that the nervous system contributes to non-contact knee ligament injury, but limited evidence has measured the effect of extrinsic events on joint stability. Following unanticipated events, the startle reflex leads to universal stiffening of the limbs, but no studies have investigated how an acoustic startle influences knee stiffness and muscle activation during a dynamic knee perturbation. Thirty-six individuals were tested for knee stiffness and muscle activation of the quadriceps and hamstrings. Subjects were seated and instructed to resist a 40-degree knee flexion perturbation from a relaxed state. During some trials, an acoustic startle (50 ms, 1000 Hz, 100 dB) was applied 100 ms prior to the perturbation. Knee stiffness, muscle amplitude, and timing were quantified across time, muscle, and startle conditions. The acoustic startle increased short-range (no startle: 0.044 ± 0.011 N·m/deg/kg; average startle: 0.047 ± 0.01 N·m/deg/kg) and total knee stiffness (no startle: 0.036 ± 0.01 N·m/deg/kg; first startle 0.027 ± 0.02 N·m/deg/kg). Additionally, the startle contributed to decreased [vastus medialis (VM): 13.76 ± 33.6%; vastus lateralis (VL): 6.72 ± 37.4%] but earlier (VM: 0.133 ± 0.17 s; VL: 0.124 ± 0.17 s) activation of the quadriceps muscles. The results of this study indicate that the startle response can significantly disrupt knee stiffness regulation required to maintain joint stability. Further studies should explore the role of unanticipated events on unintentional injury. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  19. Influence of inhaled nicotine source on arterial stiffness.

    Science.gov (United States)

    Szołtysek-Bołdys, Izabela; Sobczak, Andrzej; Zielińska-Danch, Wioleta; Bartoń, Aleksandra; Koszowski, Bartosz; Kośmider, Leon

    2014-01-01

    Tobacco smoking leads to changes in hemodynamic parameters such as heart rate and systolic or diastolic blood pressure. It has a direct influence on the elasticity of blood vessels and increases arterial stiffness, which can result in development of atherosclerosis. Data show that the nicotine in tobacco smoke probably is responsible for these changes. Electronic cigarettes (e-cigarettes) were supposedly a healthier alternative to combustible cigarettes because they imitate a process of cigarettes smoking but generate nicotine aerosol without the toxic substances from tobacco combustion. However, the use of e-cigarettes is still controversial because their toxicity, safety and long term use health impact have not been sufficiently studied. The aim of this study was to evaluate changes in arterial stiffness parameters after smoking a cigarette or e-cigarette use. Fifteen healthy women, aged 19-25 years old, smoking ≥5 cigarettes per day for at least two years participated in the study. A non-invasive measurement of arterial stiffness parameters - Stiffness Index (SI) and Reflection Index (RI) - was conducted and systolic and diastolic blood pressure and heart rate were measured before and after smoking a conventional cigarette as well as use of an e-cigarette. Statistically significant changes in the SI and RI were observed before and after smoking of a conventional cigarette [SI: 6.75m/s (6.66 - 6.85, 95% CI) vs 6.56m/s (6.46 - 6.65. 95% CI), p=0.0056; RI: 54.0% (51.5 - 56.7, 95% CI) vs 49.6% (47.5 - 51.8, 95% CI), p=0.010]. The use of e-cigarettes resulted in no statistically significant changes in the SI and RI. After both product use systolic and diastolic blood pressure and heart rate increased but the changes were not statistically significant. In contrast to conventional cigarette use, the use of electronic cigarettes causes no changes in arterial stiffness. This may indicate lower bioavailability of nicotine from the e-cigarette or an additional effect of

  20. Methodology for vocational psychodiagnostics of senior schoolchildren using information technologies

    Science.gov (United States)

    Bogdanovskaya, I. M.; Kosheleva, A. N.; Kiselev, P. B.; Davydova, Yu. A.

    2017-01-01

    The article identifies the role and main problems of vocational psychodiagnostics in modern socio-cultural conditions. It analyzes the potentials of information technologies in vocational psychodiagnostics of senior schoolchildren. The article describes the theoretical and methodological grounds, content and diagnostic potentials of the computerized method in vocational psychodiagnostics. The computerized method includes three blocks of sub-tests to identify intellectual potential, personal qualities, professional interests and values, career orientations, as well as subtests to analyze the specific life experience of senior schoolchildren. The results of diagnostics allow developing an integrated psychodiagnostic conclusion with recommendations. The article contains options of software architecture for the given method.

  1. Senior Management Use of Management Control Systems in Large Companies

    DEFF Research Database (Denmark)

    Willert, Jeanette; Israelsen, Poul; Rohde, Carsten

    2017-01-01

    The use of management control systems in large companies remains relatively unexplored. Indeed, only a few studies of senior managers’ use of management control systems consider multiple controls in companies. This paper explores data from a comprehensive survey of the use of management control...... systems in 120 strategic business units at some of the largest companies in Denmark. The paper identifies how senior management guides and controls their subordinates to meet their companies’ objectives. The presentation and discussion of the results, including citations from executive managers, use...

  2. Meanings of living in lodgings during senior high school

    DEFF Research Database (Denmark)

    Wannebo, Wenche; Devik, Siri Andreassen; Uhrenfeldt, Lisbeth

    2018-01-01

    Studies show that senior high school students living in lodgings (away from home) when attending high school are vulnerable to stress and mental health problems. Moving away from home at the age of 15-16 is a transition that might affect adolescents' well-being. The aim of this study is to explore...... the experience of living in lodgings during senior high school. In-depth interviews were conducted with 21 Norwegian lodgers of both genders between the ages of 16-18. Interviews were analyzed according to a phenomenological hermeneutical approach. Four main themes were identified: (a) striving between...

  3. Theoretical Design and Characteristics Analysis of a Quasi-Zero Stiffness Isolator Using a Disk Spring as Negative Stiffness Element

    Directory of Open Access Journals (Sweden)

    Lingshuai Meng

    2015-01-01

    Full Text Available This paper presents a novel quasi-zero stiffness (QZS isolator designed by combining a disk spring with a vertical linear spring. The static characteristics of the disk spring and the QZS isolator are investigated. The optimal combination of the configurative parameters is derived to achieve a wide displacement range around the equilibrium position in which the stiffness has a low value and changes slightly. By considering the overloaded or underloaded conditions, the dynamic equations are established for both force and displacement excitations. The frequency response curves (FRCs are obtained by using the harmonic balance method (HBM and confirmed by the numerical simulation. The stability of the steady-state solution is analyzed by applying Floquet theory. The force, absolute displacement, and acceleration transmissibility are defined to evaluate the isolation performance. Effects of the offset displacement, excitation amplitude, and damping ratio on the QZS isolator and the equivalent system (ELS are studied. The results demonstrate that the QZS isolator for overloaded or underloaded can exhibit different stiffness characteristics with changing excitation amplitude. If loaded with an appropriate mass, excited by not too large amplitude, and owned a larger damper, the QZS isolator can possess better isolation performance than its ELS in low frequency range.

  4. Co-creating value through demand and supply integration in senior industry-observations on 33 senior enterprises in Taiwan.

    Science.gov (United States)

    Yang, Ya-Ting; Iqbal, Usman; Chen, Ya-Mei; Su, Shyi; Chang, Yao-Mao; Handa, Yujiro; Lin, Neng-Pai; Hsu, Yi-Hsin Elsa

    2016-09-01

    With global population aging, great business opportunities are driven by the various needs that the elderly face in everyday living. Internet development makes information spread faster, also allows elderly and their caregivers to more easily access information and actively participate in value co-creation in the services. This study aims to investigate the designs of value co-creation by the supply and demand sides of the senior industry. This study investigated senior industry in Taiwan and analyzed bussiness models of 33 selected successful senior enterprises in 2013. We adopted series field observation, reviews of documentations, analysis of meeting records and in-depth interviews with 65 CEOs and managers. Thirty-three quality enterprises in senior industry. Sixty-five CEOs and managers in 33 senior enterprises. None. Value co-creation design, value co-creating process. We constructed a conceptual model that comprehensively describes essential aspects of value co-creation and categorized the value co-creation designs into four types applying for different business models: (i) interaction in experience spaces co-creation design, (ii) on-site interacting co-creation design, (iii) social networking platform co-creation design and (iv) empowering customers co-creation design. Through value co-creation platform design, the senior enterprises have converted the originally passive roles of the elderly and caregivers into active participants in the value co-creation process. The new paradigm of value co-creation designs not only promote innovative development during the interactive process, lead enterprises reveal and meet customers' needs but also increase markets and profits. © The Author 2016. Published by Oxford University Press in association with the International Society for Quality in Health Care. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  5. A METHOD OF DETERMINING THE COORDINATES OF THE STIFFNESS CENTER AND THE STIFFNESS PRINCIPAL AXIS OF THE VIBRATING SYSTEM WITH DAMPING

    OpenAIRE

    Dang Xuan Truong; Tran Duc Chinh

    2014-01-01

    The report presents a methodology to determine the directions of the stiffness principal axis (in this case subject to the linear displacement and forced rotation angle) of a solid object interact with the surrounding environment by resilient bearing supports. The results also show that determining the coordinates of the stiffness center in the vibrating system with damping factors is necessary in our research.

  6. The Effectiveness of Manual Therapy for Relieving Pain, Stiffness, and Dysfunction in Knee Osteoarthritis: A Systematic Review and Meta-Analysis.

    Science.gov (United States)

    Xu, Qinguang; Chen, Bei; Wang, Yueyi; Wang, Xuezong; Han, Dapeng; Ding, Daofang; Zheng, Yuxin; Cao, Yuelong; Zhan, Hongsheng; Zhou, Yao

    2017-05-01

    Knee osteoarthritis (KOA) is the most common form of arthritis, leading to pain disability in seniors and increased health care utilization. Manual therapy is one widely used physical treatment for KOA. To evaluate the effectiveness and adverse events (AEs) of manual therapy compared to other treatments for relieving pain, stiffness, and physical dysfunction in patients with KOA. A systematic review and meta-analysis of manual therapy for KOA. We searched PubMed, EMBASE, the Cochrane Library, and Chinese databases for relevant randomized controlled trials (RCTs) of manual therapy for patients with KOA from the inception to October 2015 without language restrictions. RCTs compared manual therapy to the placebo or other interventional control with an appropriate description of randomization. Two reviewers independently conducted the search results identification, data extraction, and methodological quality assessment. The methodological quality was assessed by PEDro scale. Pooled data was expressed as standard mean difference (SMD), with 95% confident intervals (CIs) in a random effects model. The meta-analysis of manual therapy for KOA on pain, stiffness, and physical function were conducted. Fourteen studies involving 841 KOA participants compared to other treatments were included. The methodological quality of most included RCTs was poor. The mean PEDro scale score was 6.6. The meta-analyses results showed that manual therapy had statistically significant effects on relieving pain (standardized mean difference, SMD = -0.61, 95% CI -0.95 to -0.28, P = 76%), stiffness (SMD = -0.58, 95% CI -0.95 to -0.21, P = 81%), improving physical function (SMD = -0.49, 95% CI -0.76 to -0.22, P = 65%), and total score (SMD = -0.56, 95% CI -0.78 to -0.35, P = 50%). But in the subgroups, manual therapy did not show significant improvements on stiffness and physical function when treatment duration was less than 4 weeks. And the long-term information for manual therapy was

  7. Presbyopia among public senior high school teachers in the Kumasi ...

    African Journals Online (AJOL)

    Objectives: The aim was to determine the uptake of correction and prescription for presbyopia of presbyopic teachers of public Senior High School (S.H.S.). Design: Descriptive cross-sectional study. Methods: The study was conducted in 12 public S.H.S. in the Kumasi, with a total sample size of 298. Questionnaire was ...

  8. 29 CFR 1625.8 - Bona fide seniority systems.

    Science.gov (United States)

    2010-07-01

    ... equitable allocation of available employment opportunities and prerogatives among younger and older workers. (b) Adoption of a purported seniority system which gives those with longer service lesser rights, and... upon the circumstances, be a “subterfuge to evade the purposes” of the Act. (c) Unless the essential...

  9. Administrative Task Performance by Heads of Senior High Schools ...

    African Journals Online (AJOL)

    This study aimed at examining the administrative task performance of heads of senior high schools (SHS) in Ghana from the organising perspective. The study hypothesized that there is no statistically significant difference in the compliance level of organising as an administrative task performance by heads in the rural and ...

  10. Computer Training for Seniors: An Academic-Community Partnership

    Science.gov (United States)

    Sanders, Martha J.; O'Sullivan, Beth; DeBurra, Katherine; Fedner, Alesha

    2013-01-01

    Computer technology is integral to information retrieval, social communication, and social interaction. However, only 47% of seniors aged 65 and older use computers. The purpose of this study was to determine the impact of a client-centered computer program on computer skills, attitudes toward computer use, and generativity in novice senior…

  11. Conceptualizing an M-Learning System for Seniors

    Science.gov (United States)

    Teine, Matthias; Beutner, Marc

    2016-01-01

    In accelerating fast changing knowledge-based and information societies such like the European Union technology dominates most facets of our everyday lives, and learning activities as well. Unfortunately, particularly seniors and elderly people suffer the risk to be left behind, and that the digital divide becomes bigger. This is problematic…

  12. Seniors, satisfaction and customer loyality in the social housing sector

    NARCIS (Netherlands)

    Dogge, P.J.C.; Smeets, J.J.A.M.

    2001-01-01

    Housing satisfaction and customer loyalty among seniors in the social rented housing sector is the subject of this study. A questionnaire survey was performed among about 6000 tenants, half of them being 55+ years of age. Older tenants showed both a higher % of satisfied households (92%), and more

  13. Seniors' experiences of living in special housing accommodation

    Science.gov (United States)

    Hellberg, Ingela; Augustsson, Veronica; Hellström Muhli, Ulla

    2011-01-01

    This article presents a hermeneutic phenomenological analysis of interview material in which 12 seniors living in Special Housing Accommodation (SHA) facilities reflect on the experience of living in such facilities. Of particular interest in the analysis is living in a SHA as a phenomenon. The finding shows that the phenomenon of lived experience in a SHA seems to be a state of ambiguity regarding one's existence, which is made up of several constituents (elements of meaning). The analysis contributes to the understanding of how the phenomenon of SHA living is coming into existence as a need, due to an individual's failing health; however, the SHA is not considered to be a true home. Accordingly, this has consequences to the subject position for the seniors in that they have to navigate between existing and not existing. The seniors learn to cope with living in the SHA by lowering their expectations of life and existence while the SHA provides the prerequisites for their existence. An implication for promoting care is to support the seniors to enable a full existence of life within SHA living. PMID:21412446

  14. An Innovative Interdisciplinary Approach to Providing Internships for College Seniors

    Science.gov (United States)

    Fuller, Kathy

    2015-01-01

    The undergraduate Business and Human Development (HD) Departments at California State University San Marcos (CSUSM), are collaborating in an innovative interdisciplinary approach to supporting internships with local businesses in order to provide college seniors with experiences in the area of career development known as the "Senior…

  15. [Positive aspects of old ages - humor of seniors].

    Science.gov (United States)

    Mareš, Jiří

    2015-01-01

    This survey study has five parts. In the first part two conceptual approaches to humor are characterized. One considers "the comic" to be an umbrella concept, and humor is only one of its rather positive forms. The other comes out from the umbrella concept "humor", and distinguishes between various forms of humor including the negative ones. Three main theories of humor are presented: theory of superiority, theory of incongruity, and a relief theory. The second part introduces humor in the elderly and draws the attention to the fact that we know relatively little about humor in old age because most research has been carried out in children, adolescents or adults in productive age. The third part of the study describes the process of diagnostics of humor in the elderly. For example, within the qualitative methods, in-depth interviews with seniors or analyses of their diary entries are used. Within quantitative methods, questionnaires are used, and this study presents the survey of seven most frequent ones applied in the studies of humor in the elderly. In the context of mixed methods, understanding of humor in young and seniors, or understanding of humor in relatively healthy seniors and seniors after stroke are compared. The fourth part of the study presents the Gelkopfs model on relationship between humor, treatment and cure of patients. The fifth part of the study demonstrates the options how to use humor to improve the mental state of the elderly (by means of individual or group interventions).

  16. Boomers and seniors: The driving force behind leisure participation

    Science.gov (United States)

    Lynda J. Sperazza; Priya Banerjee

    2010-01-01

    The 76 million Americans in the Baby Boomer population are the force behind the changing demographic picture of society today. Boomers' spending habits and lifestyle choices will also have a powerful influence on retirement and leisure in the coming decades. Boomers will redefine retirement and are expected to demand more than current senior programs and...

  17. Determinants of Students Academic Performance in Senior High ...

    African Journals Online (AJOL)

    A binary logit model is used to investigate the determinants of students' performance in the final high school examination. Questionnaires were administered to a sample of 1,129 final year students (614 boys and 515 girls) in ten senior high schools (SHSs) during the 2008/2009 academic year. Respondents were requested ...

  18. World History. A Program for Senior High School Social Studies.

    Science.gov (United States)

    Waldner, Patrick

    GRADES OR AGES: Senior high school. SUBJECT MATTER: World history. ORGANIZATION AND PHYSICAL APPEARANCE: The guide covers ten units: 1) Perspective--Man in Pre-historic and Ancient Times; 2) Feudalism and the Church in the Middle Ages; 3) Renaissance and Reformation; 4) The Emergence of Nationalism--Its Cause and Effects; 5) Revolutions of Rising…

  19. Building a More Sustainable Future for Senior Living

    Science.gov (United States)

    Scarfo, Bob

    2011-01-01

    The aging of society is an inescapable trend that some neighborhoods, municipalities, and counties are admitting needs their attention. As the extent of the changes required to become senior friendly, let alone sustainable, are being realized, many communities are experiencing pushback from voters, old-guard city and county staff, and even elected…

  20. Designing and evaluating the tabletop game experience for senior citizens

    NARCIS (Netherlands)

    Al Mahmud, A.; Mubin, O.; Shahid, C.S.; Martens, J.B.O.S.

    2008-01-01

    In this paper, we report on the design and evaluation of a tabletop game especially created for senior citizens. The game is intended to provide leisure and fun and is played with four players on an augmented tabletop. It evolved from existing games and rules that are popular and familiar amongst