Ø · 2017-05-23 · Frictional Characteristics of Machine Tool’s Slide Guides with Micro-grooves...
Transcript of Ø · 2017-05-23 · Frictional Characteristics of Machine Tool’s Slide Guides with Micro-grooves...
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�� Improvement of Gas/Liquid Two-Phase Flow
Performance by Rotational Speed Increasing of
Centrifugal Pump Impeller
���� Sinzi SATO7Daiki TAKATA7 6Naoki
MATSUSITA7 Akinori FURUKAWA
�� The 9th
Asian International Conference on Fluid
Machinery
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5 In the present study, effects of rotational speed on the
performance are experimentally examined for two kinds of
centrifugal impellers with different blade outlet angles, at
first. Then, if the shaft power would be also decreased with
deterioration of pump head, the margin to increase rotational
speed might be obtained for the driving motor. As the result,
the performance might be improved by rotational speed
increasing. This idea is secondly confirmed and the
quantitative amounts of improvement are evaluated in wide
range of water and air flow rates. Effects of rotational speed
of impeller on two-phase flow performance are discussed
with observation of air behavior in the impeller.
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�� Frictional Characteristics of Machine Tool’s Slide
Guides with Micro-grooves and Cavities
��� Kazutake UEHARA, Fumio OBATA, 6Daijiro
KONISHI, Masato YAMASAKI
��� 20075 Proceedings of the 4th International
Conference on Leading Edge Manufacturing
in 21st Century (LEM21), No.07-2055
pp.791-794
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Linear slide guides are useful for difficult-to-cut metals’
cutting. To realize a high-performance linear slide guide
with lower friction coefficient and higher damping
performance, the effects of micro-grooves and cavities
formed on the contact surfaces were examined on the
frictional characteristics. The experiments were done using
some slide guide models at sliding velocities not more than
50 m/min. The model consisting of a slider with cavities and
hardened slide guide with a mirror-like sliding surface
demonstrated the friction coefficient being about 0.02 at
sliding velocities from 1 to 6 m/min under the slideway
lubricant of VG32.
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Partnerships with extramural supporters play an important
role in a betterment of education for future generations.
Transmission of information is necessary in the school
management as is conventionally done. Furthermore, it has
been required to receive opinions of local communities,
especially, in the light of advice and assistance for students.
In this paper, an attempt to form partnerships with
extramural supporters by utilizing a blog is introduced.
Campus life of students and faculty is described in our blog,
funny, interesting, sometimes strictly, to foster a sense of
unity. Opinions of extramural supporters received via
comment and voting systems built-in blog are utilized in
student guidance. Effect of partnerships on school education
is investigated by questionnaire survey to our students. As a
result, it is confirmed that forming partnerships with
extramural supporters by utilizing a blog is beneficial for
school education.
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��5 Mechanical and optical measurement of planar
elongational viscosity in two-dimensional opposing
flow
����5 6Manabu KATO7Shinji NOBUHARA7
Yasuhiro TABUCHI7Tsutomu TAKAHASHI
��5 XVth International Congress on Rheology
(ICR2008)5 p.263
�� ��5 2008N 8S 5T
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In this study, a new technique for measuring planar
elongational viscosity of low viscosity fluids is considered.
Two dimensional opposing flow is used to generate planar
elongational deformation. Two types of apparatus, namely,
two dimensional opposing flow cell and two dimensional
opposing jet nozzle device are designed. Elongational stress
was estimated from flow birefringence and reaction force
acting on the nozzle. The planar elongation viscosity for
CTAB/NaSal aqueous solution, which is known as a
Maxwell fluid, is measured by each apparatus. Planar
elongational viscosity measured by optical technique show
good agreement with the Maxwell model. Planar elongation
viscosity measured by mechanical technique shows
qualitatively agreement to the result of optical technique, but
quantitatively is 10 times larger than the result measured by
the optical technique.
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of ultra high strength low alloy TRIP-aided steels
���5 Tomohiko HOJO, Koh-ichi SUGIMOTO, Youichi
MUKAI, Shushi IKEDA5
���5 ISIJ International5 pp.824-829
�� �5 2008N 6S
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To improve the delayed fracture strength of ultra
high-strength low alloy TRIP-aided steels with bainitic
ferrite matrix (TBF steels), the effects of aluminum content
on hydrogen absorption behavior and delayed fracture
properties of 0.2%C-0.2-1.5%Si-1.5%Mn TBF steel were
investigated. When aluminum was added to the TBF steel,
the diffusible hydrogen increased. It was expected that the
hydrogen was charged not only in retained austenite films
but also on lath boundary. Delayed fracture strength of TBF
steels containing aluminum were significantly increased,
compared with conventional TBF steel. This was mainly
caused by (1) suppression of the stress-assisted martensite
transformation resulting from the stabilized or
carbon-enriched retained austenite, (2) hydrogen trapping to
refined interlath retained austenite films and lath boundary,
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For improvement the efficiency of the cold cathode
lamp (CCL), it is important to select the optimum
electrode material for reducing the cathode fall voltage
(CFV). And it is necessary to grasp the relation between
the electrode material and the CFV. So we attempt to
measure the CCL's CFV with the indirect CFV
measurement method using on the hot cathode
fluorescent lamp. And by observing the negative glow on
the electrode, the relation between the CFV and the
negative glow condition is investigated. As a result of the
examination, it is confirmed that the relation between the
CCL's CFV and the γ coefficient of the electrode.
Moreover it is cleared that the relation between the CFV
and the negative glow condition of each electrode
material. It is considered that the CFV measurement
method is useful for estimating the performance of the
CCL's electrode.
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In this paper the relationship between the electrode-less
lamp’s characteristics and the operating frequency was
studied. 13.56 MHz and 135 kHz were used as the operating
frequencies. The electrode-less lamp’s characteristics mean
the starting characteristic, the plasma characteristics like the
electron temperature or density, and the efficiency regarding
UV radiation. It was founded that the efficiency regarding
UV radiation at 135 kHz was 6% lower than at 13.56 MHz,
and that the plasma characteristics at 135 kHz were different
from those at 13.56 MHz
�����
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We report the analysis of the plasma in a low pressure
discharge in induction lamp by Finite Element Method. We
tried numerical analysis of electron density in the plasma by
FEM, and verified the plasma simulation by using the
measured data which was already reported in the past [1]. As
a result, the calculated electron density distribution showed
the similar tendency with the measured data.
��5 �����°����aùÙ�ù�øûi{�
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To improve the efficiency of the cold cathode lamp (CCL),
it is important to select the optimum electrode material to
reducing the cathode fall voltage (CFV). Furthermore, it is
necessary to understand the relationship between the
electrode material and the CFV. By investigating the CFL of
the CCL, it is realized that the relation between the CFV of
CCL and the γ coefficient of the electrode material. And by
observing the negative glow on the electrode, it is realized
that the variation of the negative glow with the lamp current
depends on the electrode material.
��5 A STUDY ON THE PLASMA
CHARACTERISTICS OF INDUCTIVELY
COUPLED ELECTRODE-LESS LAMP
�����5 6Tadao Uetsuki, Masahiro Ueda,
Motohiro Saimi and Hidenori Kakehashi
���5 ICOPS 2008, Karlsruhe, Germany
Proceedings of the 35th IEEE International
Conference on Plasma Science5 p.287
�� ��5 2008N 6S 17T
��
The researches to reduce the operating frequency of the
inductively coupled electrode-less lamp have been being
done in order to increase the efficiency and the lumen output.
This is because, if the operating frequency was decreased,
the many semiconductor devices for higher lumen output
could be used and the switching loss could be reduced for
higher efficiency. Typically there are two types of the
electrode-less lamps, which are the toroidal shape lamp like
“Endura” and the ball shape lamp like “Everlight% or “QL”.
The electric characteristics of the plasma of the toroidal
shape lamp operated at 450kHz and the analysis of the
discharge of the ball shape lamp operated at RF had been
reported by R.Piejak et al1,2. Authors studied the
relationship between the electrode-less lamp’s characteristics
and the operating frequency for the ball shape electrode-less
lamp like “QL”. 13.56 MHz and 135 kHz were used as the
operating frequencies. The electrode-less lamp’s
characteristics mean the starting characteristic, the plasma
characteristics like the electron temperature or density, and
the efficiency regarding UV radiation.
The air-core coil used for operating the lamp at 13.56MHz,
composed of the annealed copper wire plated by silver, was
wound two turns on the surface of the lamp. While the
power coupler used for operating the lamp at 135 kHz,
composed of the 40 turns litz wire, ferrite core and cupper
pipe, was inserted into the cavity. Its value of the inductance
was 160 (micro-henries).
The following things were found form this study.
(1) The lamp driven at 13.56 MHz is ignited by H-discharge,
while one driven at 135 kHz is ignited by E-discharge, and
then changes into H-discharge.
(2) The efficiency regarding UV radiation at 13.56 MHz was
7% higher than at 135 kHz
(3) The point of the peak of the electron density shifts from
near the cavity to near the outer bulb when the operating
frequency changes from 135 kHz to 13.56 MHz.
(4) The electron temperature increases with coming closer to
the cavity at 135 kHz operation, while it decreases at 13.56
MHz operation.
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��� Effect of H2S annealing for CuInS
2 thin films
prepared by a vacuum evaporation method
���� 6Y Akaki, K Nomoto, S Nakamura, T Yoshitake
and K Yoshino
���� Journal of Physics: Conference Series
Volume 100, 2008, 082022
�� �� 2008N 3S 27T
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CuInS2 thin films were prepared by the vacuum
evaporation method. The source materials were CuInS2
powder grown by a hot-press method. After the vacuum
evaporation, the samples were subsequently annealed under
air or H2S atmospheres from 100 to 500 ˚C
The XRD spectra indicate that the CuInS2 polycrystalline
films were successfully obtained by annealing above 200 ˚C.
We found that the films became close to stoichiometry with
increasing annealing temperature under H2S atmosphere.
Furthermore, it is found that maximum grain size of the
samples was about 1�m from the SEM photographs. The
carrier concentrations and the resistivities of the films were
changed in the range of 1018
-1023
cm-3
and 10-3
~100
�cm,
respectively, at room temperature and all the samples
annealed in H2S indicated p-type conduction by the Hall
measurement. It is deduced that the almost sulfur vacancy in
the films annihilated by the H2S annealing.
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2 thin films grown
by a vacuum evaporation method �����
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��� Simple Analog Complementary Metal Oxide
Semiconductor Circuit for Generating Motion Signal
���5 6Kimihiro Nishio, Kenji Matsuzaka and
Hiroo Yonezu
���5 Optical Review, vol. 14, pp. 282-289
�� ��� 2007N 10S 1T
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An analog complementary metal oxide semiconductor
(CMOS) circuit for generating a motion signal was proposed
based on the vertebrate retina. The unit circuit is
constructed with six MOS transistors and one capacitor.
Results obtained by the simulation program with integrated
circuit emphasis (SPICE) and the measured results of a test
circuit showed that the proposed circuit can output pulsed
current (motion signal). The aperture ratio is expected to
be about 21%, which is twice as large as that of the
previously proposed circuit. An integrated circuit for real
time image processing can be realized by applying the
two-dimensional network constructed with the proposed
simple circuits.
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��5 Simple Analog Metal Oxide Semiconductor
Circuit for Edge Detection
����5 6Kimihiro Nishio and Hiromu Nakahara
��5 The International Conference on Electrical
Engineering 2008
�� ��5 2008N 7S 7T
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Novel analog edge detection circuits were proposed based
on the vertebrate retina. The unit circuit is constructed with 8
n-channel metal oxide semiconductor (MOS) transistors.
The results with the simulation program with integrated
circuit emphasis (SPICE) showed that the proposed circuits
can detect edge positions with dynamic range of 5 decades.
The measured results of the test circuit constructed with
discrete MOS transistors on the breadboard showed that the
circuits can detect edge positions. The fill factor of the
novel circuit is expected to be about 52.1%. The advanced
vision chip for edge detection which is characterized by high
fill factor and wide dynamic range can be realized by
applying the proposed circuit.
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��5 Fluid Flow Analysis and Design of a Shroud for
Wind Turbine Using ANSYS
���5 6H. Toya, T. Kusakabe and T. Yuji
���5 Int. Conf. on Electrical Machines and Systems,
PRP-01 (Seoul, Korea)
�� �5 2007N 10S
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An effect of shroud on a small-scale wind power
generator was experimentally studied and is shown that
its output power increased by a factor 2.5 to 5. Flow
velocity-profile and pressure distribution inside the
shroud were analyzed with an electronic computer.
Simulated result proves quantitively to agree with the
experimental result. Then, analysis was performed for
other kinds of shroud structure. It leads new shroud in
which cost of the shroud will be reduced with similar
velocity profile. However, the shroud needs inlet and
some examples were designed for test. Experimental
results are discussed in comparison with the simulated
velocity profile.
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��5 SAMPE (The Society for the Advancement of
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���5 Hironari Taniguchi, Koichi Suzumori, and
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��� Proceedings of the 2008 IEEE/ASME
International Conference on Advanced Intelligent
Mechatronics July 2 - 5, 2008, Xi'an, China
�� ��5 2008N 7S 2-5T
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The aim of this research is to develop a laptop micro
reactor system which can apply to many chemical synthetic
processes. If we can reach the reactive conditions quickly
and effectively using this micro reactor system, the speed of
research and development will improve spectacularly. Here
we design and fabricate a prototype of micro reactor with
integrated fluid control devices. Developed fluid control
devices are micro pumps, micro mixers, and a temperature
regulator. Especially, the micro mixer is a novel one which
has an active mechanism with a magnetic actuator. The
results indicated the availability of these devices. We
represent a first possible step towards a laptop micro reactor
system for chemical synthetic process.
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����5 6Takao Tsukutani7Yasuaki Sumi7Noboru
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���5 International Journal of Electronics
Vol.945 No.125 pp.1137-1146
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��5 A Study on Improvement Extraction Stability of
Active Net Using All-Image BL-DCDAM
Introduced BL-DCDAM
����5 6Fukuya Namba, Yasuaki Sumi, Takuya
Ueta , Noboru Yabuki, Takao Tsukutani
���5 Proceedings of International Technical
Conference on Circuits/Systems, Computer
and Communications (ITC-CSCC2008)5
pp. 477-480 5
�� �5 2008N 7S
��5
In this paper, we have described the new All-Image
DCDAM that introduces BL-DCDAM into conventional
All-Image DCDAM that we have proposed before.
BL-DCDAM adopts the algorithm independent on the order
of presenting the input vectors. To our research,
BL-DCDAM is effective because we used all pixels of the
input image as the input vectors. New All-Image
BL-DCDAM has obtained a correct result even in the case
that conventional one has failed from the experiment.
��� Electronically tunable current-mode biquadratic
circuit using current controlled unity gain cells
����5 6Ayumu Karita, Takao Tsukutani, Noboru
Yabuki, Yasuaki Sumi
���5 Proceedings of International Technical
Conference on Circuits/Systems, Computer
and Communications (ITC-CSCC2008) 5
pp. 1017-1020 5
�� �5 2008N 7S
��5
This paper introduces an electronically tunable
current-mode biquadratic circuit employing current
controlled unity gain cells. The circuit is constructed with
two current controlled current followers (CCCFs), two
CCCFs with voltage buffers (CCCFBs) and two grounded
capacitors. The circuit can realize low-pass, band-pass,
high-pass, band-stop and all-pass transfer functions by
choosing appropriate current input and output terminals
without any component matching conditions. Additionally,
the circuit parameters ω� and Q can be tuned orthogonally
through adjusting the bias currents. The biquadratic circuit
enjoys very low sensitivities with respect to the circuit
components. An example is given together with simulated
results by PSPICE.
��5 Electronically Tunable Multiple-Mode
Biquadratic Circuit Employing OTAs and Grounded
Capacitors
����5 6Hiroki Kawakami, Takao Tsukutani,
Noboru Yabuki, Yasuaki Sumi
���5 Proceedings of International Technical
Conference on Circuits/Systems, Computer
and Communications (ITC-CSCC2008)
pp. 1429-1432 5
�� �5 2008N 7S
��5
This paper introduces an electronically tunable
multiple-mode biquadratic circuit employing operational
transconductance amplifiers (OTAs) and grounded
capacitors. The basic circuit configuration is obtained from a
second-order integrator loop structure consisting of loss-less
and lossy integrators. The multiple-mode biquadratic circuit
can realize low-pass, band-pass, high-pass, band-stop and
all-pass transfer functions by suitably choosing the current
output terminals. Additionally, the circuit parameters ω�, Q
and H can be set orthogonally through adjusting the bias
currents of the OTAs. The biquadratic circuits enjoy very
low sensitivities with respect to the circuit components.
Some examples are given together with simulated results by
PSPICE.
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��� Database design in a distributed educational PSE
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���� 6Takayuki Teramoto, Tadashi Okada, Shigeo
Kawata
��� APCOM[075 EPMESC XI 5 p.148
�� ��� 2007N 12S 6T
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In this paper we present the structure of the
TSUNA-TASTE system and detail structure of the new
database employed in the TSUNA-TASTE. The
TSUNA-TASTE supports teachers and students in
computer-based education. The TSUNA-TASTE PSE
gathers the students' real time data for their computer
operations, and analyzes the data obtained. From the
database the TSUNA-TASTE PSE extracts important
characteristics for individual students and for a class. The
TSUNA-TASTE may open a new helpful e-learning
direction.
��� A distributed education-support PSE system
��� 6Takayuki Teramoto, Tadashi Okada, Shigeo
Kawata
��� Third IEEE International Conference on
e-Science and Grid Computing 5 pp.516-520
�� ��� 2007N 12S 10T
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Network-based learning or e-Learning has been taking an
important role in education as helpful education tools.
However, it is difficult for teachers to retrieve education data
from students or to obtain data from the student activities.
Therefore, we have developed a problem solving
environment (PSE) for the education and learning support:
TSUNA-TASTE.5 [1] The TSUNA-TASTE system collects
the system-usage situation, the information for the windows
used and the operation situation of the mouse and key board
of all students. The data, which the system TSUNA-TASTE
collects, are stored in a database on the TSUNA-TASTE
system server.
In this paper we present the structure of the TSUNA-TASTE
system and detail structure of the network in the
TSUNA-TASTE. The TSUNA-TASTE supports teachers
and students in computer-based education. The
TSUNA-TASTE may open a new helpful e-Learning world.
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��5 Correction Method for Wind Speed Prediction After
a Short Time Using Hierarchical Neural Network
����5 6Hitoshi Sori7Takashi Yasuno
��5 2008 RISP International Workshop on
Nonlinear Circuits and Signal Processing5
pp.259-262
�� ��5 2008N 3S 7T
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This paper describes a correction method for wind speed
prediction after a short time using hierarchical neural
network. Our proposed wind speed prediction system
consists of two parts, one is the prediction block, and the
other is the correction block. A mean wind speed and a
correction value are calculated by the hierarchical neural
network which inputs weather data. Simulation results
demonstrate the effectiveness of the proposed wind speed
prediction system and correction method.
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��5 Spatiotemporal burst coding for extracting features
of spatiotemporally varying stimuli
���� 6Kazuhisa Fujita7 Yoshiki
Kashimori,5 Takeshi Kambara
��� Biological Cybernetics5 vol. 97, pp.293–305
�� �5 2007N 9S
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5 Encoding features of spatiotemporally varying stimuli is
quite important for5 understanding the neural mechanisms
of various sensory coding. Little is known about how
spatiotemporal feature of stimulus is encoded by
spatiotemporal property of neural activity. To address this
issue, we propose here a population coding with burst spikes,
called here spatiotemporal burst (STB) coding. To show
concretely the role of STB coding, we study electrosensory
system of a weakly electric fish. We show that the control
of burst activity, caused by the synaptic plasticity, leads to
extracting the stimulus features depending on the stimulus
context. Our results suggest that sensory systems use burst
spikes as a unit of sensory coding in order to extract
spatiotemporal features of stimuli from spatially distributed
stimuli.
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��5 Neural mechanism5 of extracting
behaviorally-relevant features of stimulus by
short-term synaptic plasticity in electrosensory
perception
����5 6Kazuhisa Fujita 7Yoshiki Kashimori
���5 Neuro20075 p.181
�� �5 2007N 9S
��
To investigate the neural mechanism of extracting
behaviorally-relevant features of stimulus by short-term
synaptic plasticity, we studied the functional roles of
short-term synaptic plasticity in electrosensory perception
under competing signals of electrolocation and
electrocommunication. Weakly electric fish can detect an
object nearby the fish, so called electrolocation, and
communication signals from a neighboring electric fish, so
called electrocommunication, using amplitude modulations
of their self-generated electric organ discharge (EOD). We
developed a model of fish body by which we calculate
numerically the spatiotemporal patterns of electric field
around the fish body, and made the model of electrosensory
system which consists of receptors, hindbrain, and midbrain.
In this paper, we show that the short-term synapses of
hindbrain neurons are used in order to efficiently extract the
spatiotemporal features required for electrolocation and
communication from the competing signals.
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��� Phase Transition of cooperative behavior on Social
Networks
����5 Kazuhisa Fujita
���5 The Second China-Japan Colloquium of
Mathematical Biology5 p.74
�� �5 2008N 8S
��
A social network has complex structure. Examples include
the network of film actors, coauthors of scientific paper,
email messages, and many others. It seems that structures of
networks might affect individual behavior. We investigate
how structures of networks affect individual behavior. To
study effect of a network on individual behavior, we made
an evolutional game based on a repeated prisoner's dilemma
game with graphs. We examine relation between
cooperativeness and connectivity. In this study, we find that
cooperativeness increase with connectivity. Furthermore
phase transition of cooperativeness appear at specific value
of connectivity. This result suggests development of
cooperativeness would require more than particular
connectivity of a network. In the other hand, this result also
suggests that coexistence with individuals who have various
strategies may require lower connectivity.
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���5 TUµ�� 63 �N¼8���
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���5 (wÑP�� 116� 2·5 pp. B134-B136
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��5 Eigenvalue Distributions of Quark Matrix at
Finite Isospin Chemical Potential
����5 6Yuji Sasai, Gernot Akemann, Atsushi
Nakamura and Tetsuya Takaishi
!"�5 Lattice 2008, The XXVI International
Symposium on Lattice Field Theory,
Williamsburg, Virginia, USA
�� ��5 2008N 7S 15T
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5 We compare eigenvalue distributions of phase quenched
Lattice QCD and Random Matrix Theory (RMT). We
calculated eigenvalue distributions of quark matrix on 83
×4
lattice by Nf = 2 KS fermions. We performed fittings
between these lattice data and RMT at coupling β=5.30 and
iso-vector chemical potential μa=0.0, 0.004773, 0.1 and 0.2
(weak non-hermiticity) and then find good agreement. Our
data indicates that Fπ decreases as the iso-vector chimical
potential increases.
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��� The effect of burn-off on the adsorption of N2 and
Ar on a natural graphite.
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��� 6Kazuhisa Miura, Hiroshi Yanazawa, Kazuyuki5
Nakai
���� Adsorption5 Vol.13, No.2, 2007, pp139-147
�� �� 2007N 10S
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Adsorption-desorption isotherms of N2 and Ar were
measured at 77K using samples of graphite that were
partially burned off at 600ú in O2 gas saturated with water
vapor at 25ú. The amounts of adsorbed N2 and Ar dropped
drastically as the degree of burn-off increased. The isotherms
all showed a steep rise, or step, in the amount of adsorbed N2
and Ar at a relative pressure of around 0.4. Moreover, the
hysteresis was much narrower after burn-off than before.
These anomalies can be explained by the presence of
functional groups on the graphite that produces H2O and
CO2 upon decomposition and in terms of pores on the
surface of graphite.
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