338 research outputs found
Relation between Results of X-ray Testing of P. V. C Welds and Their Mechanical Strength
X-ray radiography and penetrant inspection have been applied in nondestructive
testing of P. V. C welds. The relation between the image of defects and
the static strength has been examined
A Study on the Molten Cutting of the Thermoplastic Cloth
he apparatus was made for trial, which may examine the possibility and
the practicality of welding and molten cutting of thermoplastic cloth. Microstructure
examination of molten parts is also done by this
Statistical potentials for RNA-protein interactions optimized by CMA-ES
Characterizing RNA-protein interactions remains an important endeavor, complicated by the difficulty in obtaining the relevant structures. Evaluating model structures via statistical potentials is in principle straight-forward and effective. However, given the relatively small size of the existing learning set of RNA-protein complexes optimization of such potentials continues to be problematic. Notably, interaction-based statistical potentials have problems in addressing large RNA-protein complexes. In this study, we adopted a novel strategy with covariance matrix adaptation (CMA-ES) to calculate statistical potentials, successfully identifying native docking poses
A Study on the Stress Distribution Around Filler of Polymer Composite Materials
In this paper, process of bonding and bonding rupture of matrix and spheroid
oxidizing iron grains contained in polyethylene film are photographically
observed by means of optical microscope, stress distribution around filler is
sought for by finite element method, and the process of rupture of bonding
by stress concentration is studied
A Study on the Characteristics at Low Temperature of Welded Polycarbonate
In this study we investigated the tensile characteristics of
welded polycarbonate at low temperature. This study intends to
clarify the low temperature characteristics of welded part comparing
with those of base material. The results of some measurements on the
tensile properties from 20°C down to -70℃ are reported and the
changes in tensile properties under low temperature atmosphere are
discussed. Furthermore, notch and load velocity effects on the
brittle fracture tendency are also discussed.
Conclusions obtained in this study are summarized as follows;
1) Both welded part and base material of polycarbonate are strengthened
at low temperature. 2) Welding joint efficiency of polycarbonate
is very good even at low temperature. 3) Notch and load velocity
effects are observed both on the base and the welded materials.
4) Correlations are observed between fracture surfaces and mechanical
testing results
A Study on the Thin Plate with Carbon Fiber Reinforced Hybrid Composite
In this paper we describe an experimental study, this article is
to report fundamental data of constructions attained by carbon fiber
reinforced hybrid composite of O.9mm in thickness whose resin base
was reinforced. As a result of this series of test and experiments,
it was found that; it is possible to attain reinforced resin base of
hybrid composite of C.F.R.P. 16 times as much in rigidity against
bending load as compared with that of single construction was observed
with composite of O.9mm lamina. It was found that sandwich construction
of C.F.R.P. is superior, while, in the case of canape construction,
it was found necessary to have C.F.R.P. on the tension
side. G.F.R.P. has possibility to be reinforced composite material,
although it is considerably less superior to C.F.R.P
A Study on the Adhesion of the Composite Denture
In this paper we describe an experimental study, in the preceding
article, authors reported about the abrasion for composite teeth, in
this article are a composite denture which was newly made combining
merits of the porcelain and the plastic teeth, a trial production of
composite materials of the porcelain and the plastic teeth, and an
experimental study of adhesion property of the composite tooth.
The following summary can be made from the results of the present
experiments. Adhesion of composite denture with filler of porcelain
element in principal can be fully expected. In comparison with adhesion
strength of P.M.M.A. to P.M.M.A., tensile joint efficiency
adhered by P.M.M.A. of heat-cured type was 84-100%, while that of
P.M.M.A. of low temperature cured type was 97-98%. Bending joint
efficiency using the former adhesive was 87-94%, while that of the
latter adhesive was 83-85%
A Study on the Fatigue Characteristics of Polymethylmetacrylate Adherends
In this paper we describe an experimental study. Reported in
this article are tensile fatigue characteristics of polymethylmetacrylate
and its bonded material in relation to wave form of
load, loading velocity and notch effect. In experiments, heat
cured acrylic resin was used for base material, while heat cured
and self-cured polymethylmetacrylate (Denture Acrylic SHOFU "Bio"
Resin) were used as Adhesives.
As a result of the research of test and experiments, it is found
that;
1) Fatigue limits of the bonded materials using heat cured and
self-cured P.M.M.A. are approximately 2/3 and 1/3 of that of the
base material.
225
2) Two-fold property of S-N curve can be seen with dental P.M.M.A.,
and such property is partly attributable to temperature rise of the
test piece. Fatigue limit drops as test velocity increases, and
such drop is again partly attributably to temperature rise of the
material.
3) Effect of notch is observed and it is noted that the notch
causes deterioration in endurance limit by about 1/4
A Study on the Fatigue Characteristics of Polymethylmetacrylate Adherends
In this paper we describe an experimental study. Reported in
this article are tensile fatigue characteristics of polymethylmetacrylate
and its bonded material in relation to wave form of
load, loading velocity and notch effect. In experiments, heat
cured acrylic resin was used for base material, while heat cured
and self-cured polymethylmetacrylate (Denture Acrylic SHOFU "Bio"
Resin) were used as Adhesives.
As a result of the research of test and experiments, it is found
that;
1) Fatigue limits of the bonded materials using heat cured and
self-cured P.M.M.A. are approximately 2/3 and 1/3 of that of the
base material.
225
2) Two-fold property of S-N curve can be seen with dental P.M.M.A.,
and such property is partly attributable to temperature rise of the
test piece. Fatigue limit drops as test velocity increases, and
such drop is again partly attributably to temperature rise of the
material.
3) Effect of notch is observed and it is noted that the notch
causes deterioration in endurance limit by about 1/4
Increased Intrathecal Chemokine Receptor CCR2 Expression in Multiple Sclerosis
Expression of CCR2, CXCR3 and CCR4 on CD4+ T or CD8+ T cells in blood and cerebrospinal fluid (CSF) for multiple sclerosis (MS) was measured by 3-color flow cytometry, and compared to blood from healthy controls and CSF from patients with other inflammatory neurological diseases (INDs). CD4+CXCR3+/CD4+CCR4+ ratio (representing Th1/Th2 balance) was higher in both CSF and blood of MS patients than those of IND patients or healthy controls. Percentage of CCR2-positive T cells was significantly higher in CSF from MS patients. Increased CCR2 expression on T cells in CSF and Th1/Th2 imbalance may reflect the pathological processes involved in MS
- …