757 research outputs found
The Design, Construction and Evaluation of a Pilot Project of a Bahay Kubo Inspired Floating Home
No full textIn the overpopulated deltas of the Philippines people live in are-as that see floods regularly. The floods are being caused by a com-bination of tides, heavy rainfall and land subsidence. The demand for safe and affordable housing is immense, yet available dry land is scarce. By implementing floating homes in vacant former rice fields, demanded new building space is becoming available. To come to a sustainable design that fits in the Pampanga Delta, traditional building designs as the Bahay Kubo have been analysed. Many aspects of this design correspond with modern sustainable development goals. By means of parametric building simulations, key aspects of the Bahay Kubo have been used to provide the home with good performances in indoor climate and structural behavior. Now the first pilot building has been built, the home is being tested for validating the parametric models and to evaluate the building design. The first round of test results has led to proper insights in indoor climate, user friendliness, and affordability. Initial design improvements have been made and will be used in upcoming developments such as the construction of a floating neighborhood and the construction of floating classrooms.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Mechanic
Analysis of non-stationary Navier-Stokes equations approximated by the pressure stabilization method (Mathematical Analysis of Viscous Incompressible Fluid)
No full textThis article is based on the paper [T. Kubo and R. Matsui, On pressure stabilization method for nonstationary Navier-Stokes equations, Communications on Pure and Applied Analysis, 17, No.6 (2018), 2283-2307.] by the author and R. Matsui and the study with H. Kikuchi. More detail information and proofs can be found in [T. Kubo and R. Matsui, On pressure stabilization method for nonstationary Navier-Stokes equations, Communications on Pure and Applied Analysis, 17, No.6 (2018), 2283-2307.]( and [T. Kubo, Analysis of non-stationary Navier-Stokes equations approximated by the pressure stabilization method, RIMS Kokyuroku, 2107, 46-68.])
Fabricación y comercialización kubo didáctico “Wayru”
No full textNuestro producto por comercializar es Kubo Didáctico Wayru, el cual está formado
por cubos de madera articulados entre sí, a través de su manipulación se propone hacer
llegar información histórica peruana de manera divertida a los niños. Se presenta como
una idea innovadora en el mercado de educación mediante el juego, ya que su contenido
se refiere a las leyendas de la fundación del Imperio Incaico y Culturas Preincaicas, su uso
además fortalece el desarrollo de habilidades motoras finas.Trabajo de Investigació
Literal means and hidden meanings : a new analysis of skillful means
No full textSkillful means is usually used by scholars and Buddhists to denote the following simple
idea: the Buddha skillfully adapted his teaching to the level of his audience.1
This very broad and somewhat oversimplified definition tries to incorporate the
whole range of Buddhist views on the subject. However, it does not help to explain
why there is an extensive use of the term in central Mahayana su tras while
pre-Mahayana texts are almost completely silent on this issue. I suggest that skillful
means has not always been an all-Buddhist concept; rather, it was developed by
Mahayanists as a radical hermeneutic device. As such, skillful means is a provocative
and sophisticated idea that served the purpose of advancing a new religious ideology
in the face of an already established canonical knowledge. The Mahayana use
of the concept exhibits an awareness, not found in pre-Mahayana thought, of a gap
between what texts literally say and their hidden meaning
Analysis of transport properties determined by Langevin dynamics using Green-Kubo formulae
No full textRecently, the Langevin dynamics method has been applied to simulate gas flows. It is very crucial to evaluate whether the Langevin dynamics could correctly predict transport properties of gas or not. In this paper, the transport properties of Langevin velocity model and acceleration model are analyzed by using Green-Kubo formulae. For the Langevin velocity model, the time correlation functions have the exact exponent forms, and the Prandtl number for monatomic gas is predicted to be 3/2. For the Langevin acceleration model with an additional time scale, the molecular movements change from Markovian process to Non-Markovian process, and the Prandtl number could be adjusted to some extent. In the limit of equilibrium, there is a minimum about 1.298 for the Prandtl number of monatomic gas when the two time scales are equal in Langevin acceleration model. Besides theoretical analyses, molecular simulations according to the Langevin velocity model and acceleration model are performed, and the simulation results validate our analytical solutions. (C) 2014 Elsevier B.V. All rights reserved
Morphological and molecular characterization of the senile osteoporosis in senescence-accelerated mouse prone 6 (SAMP6)
No full textChewing, Stress-Related Diseases, and Brain Function
No full textSCI(E)PubMedEDITORIAL [email protected]
Mechanism of nonlinear biodynamic response of the human body exposed to whole-body vibration
No full textWhen the human body is exposed to mechanical vibration, the resonance frequencies of the
frequency response functions, such as apparent mass and transmissibility, decrease with
increasing magnitude of excitation. For the past two decades, this biodynamic ‘nonlinearity’ has
been reported with vertical and horizontal excitation of the body in a wide variety of static sitting
and standing postures that require activity from muscles to maintain the stability of the body.
There has been speculation, but no experimental evidence, as to the mechanism causing the
non-linearity. A review of the literature suggested that either active muscular activity or passive
thixotropy of soft tissues is the primary cause of the nonlinearity. The principal objective of this
thesis is to identify, and provide experimental evidence of, the primary causal mechanism for
the biodynamic nonlinearity.
With 0.5 to 20 Hz broadband random vertical vibration at 0.25 and 2.0 ms-2 r.m.s., the first
experiment investigated the effect of voluntary periodic upper-body movement and vibration
magnitude on the apparent masses of 14 seated subjects. Some movements of the body, such
as ‘back-abdomen bending’, significantly reduced the difference in resonance frequency at the
two vibration magnitudes compared with the difference during upright static sitting. Without
voluntary periodic movement, the median apparent mass resonance frequency was 5.47 Hz at
the low vibration magnitude and 4.39 Hz at the high vibration magnitude. With voluntary periodic
movement (e.g. back-abdomen bending), the resonance frequency was 4.69 Hz at the low
vibration magnitude and 4.59 Hz at the high vibration magnitude. It was concluded that
voluntary or involuntary muscular activity, or passive thixotropy of soft tissues, or both muscle
activity and thixotropy, could explain the reduction in nonlinearity evident during voluntary
periodic movement.
The effect of shear history and vibration magnitude on the apparent mass was investigated
using 12 subjects in a relaxed semi-supine posture assumed to involve less muscle activity than
static sitting and standing. The semi-supine subjects were exposed to two types of vertical (in
the x-axis of the semi-supine body) and longitudinal horizontal (z-axis) vibration: (i) continuous
random vibration (0.25–20 Hz) at five magnitudes (0.125, 0.25, 0.5, 0.75, and 1.0 ms-2 r.m.s.); (ii)
intermittent random vibration (0.25–20 Hz) alternating between 1.0 and 0.25 ms-2 r.m.s. With
continuous random vibration, the dominant primary resonance frequency in the median
normalised apparent mass decreased from 10.35 to 7.32 Hz as the magnitude of vertical
vibration increased from 0.125 to 1.0 ms-2 r.m.s., and from 3.66 to 2.44 Hz as the magnitude of
horizontal vibration increased from 0.125 to 1.0 ms-2 r.m.s. With the intermittent vibration, the
resonance frequency was higher at the higher magnitude (1.0 ms-2 r.m.s.) and lower at the
lower magnitude (0.25 ms-2 r.m.s.) than during continuous vibration at the same magnitudes.
The response was typical of thixotropy being the primary cause of the nonlinearity.
Harmonic distortions in the dynamic force of semi-supine subjects exposed to sinusoidal
excitation showed similar dependence on the frequency and magnitude of vibration as
previously reported for seated subjects, again suggesting thixotropy as a primary cause of the
nonlinearity.
In a group of 12 subjects, the apparent mass and transmissibility to the sternum, upper
abdomen, and lower abdomen were measured in three supine postures (relaxed semi-supine,
lying flat, and constrained semi-supine) during vertical random vibration (0.25 to 20 Hz) at
seven vibration magnitudes (nominally 0.0313, 0.0625, 0.125, 0.25, 0.5, 0.75 and 1.0 ms-2
r.m.s.). The motion transmission path that included more soft tissues exhibited a greater
nonlinear response. The substantial nonlinearities found in transmissibilities to both the sternum
and the abdomen of supine subjects, and previously reported for the transmissibilities of seated
and standing subjects, imply that soft tissues at the excitation-subject interface contribute to the
nonlinearity.
It is concluded that the thixotropy of soft tissues, rather than voluntary or involuntary muscular
activity, is the primary cause of the biodynamic nonlinearity seen with varying magnitudes of
excitation
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