Passive Acoustic Sensing for the Assessment of Knee Conditions

ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NVEarly detection and diagnosis of knee related health disease is critical in mitigating the long term health risks of such ailments. Passive acoustic sensing is an under-utilized monitoring system that can be used in the assessment and potential diagnosis of knee health that has many potential benefits when compared to current medical technology. Developing accurate acoustic models and procedures for analyzing acoustic sensor data in these applications is of great importance. This paper presents the design and development of passive acoustic sensing system for characterizing knees along with data analysis techniques towards this end.International Foundation for TelemeteringProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection

A Model Analysis of the Influence of Early Childhood Experiences and Family Environment on Future Interest in Science at Elementary School

The purpose of this study is to conduct an exploratory analysis using a statistical model of the effects of early childhood experiences and family environment on interest in learning science in the fourth grade, and to examine whether there are issues that should be addressed before entering elementary school. Secondary analysis will be conducted using data provided by a panel survey (Japanese Longitudinal Study of Children and Parents: JLSCP). The model analysis using the structural equation modeling method indicated that F3 (remembering and thinking) as a strength and weakness in the first grade influenced the interest in learning science in the fourth grade. However, since the r-squeare of this model is low, the variables will be used in the analysis need to be further examined

家兎における血清 HDL におよぼす出血性ショックの影響

In order to study the changes in the levels of serum HDL (high density lipoprotein) by hypovolemic shock due to hemorrhage, blood was withdrawn from five female rabbits through a catheter inserted into an aortic arch via carotid artery. Three to five milliliters of blood intermittently withdrawn, which accerelated the hemorrhagic shock condition, were served for the lipid and lipoprotein analysis. During the experimental period, the portal blood flow and mean blood pressure of aortic arch were measured and Indocyamine green test (Rl5) performed frequently in the animals. (1) The serum concentration of HDL-cholesterol and HDL-phospholipids (d.>1.063 which involves VHDL (very high density lipoprotein)-phospholipids) gradually decreased and the total and LDL (low density lipoprotein) + VLDL (very low density lipoprotein)-cholesterol and phospholipids showed slight decreases immediately after the commencement of experiment and kept almost constant thereafter. (2) The magnitude of decrease in lipids was higher in HDL2 than HDL3 fraction, and VHDL-phospholipids were not affected by hemorrhagic shock. (3) The lipid and protein compositcon of HDL2 revealed a significant decrease in percent cholesterol and phospholipids accompanied by a relative increase in percent protein and triglycerides, and that of HDL3 showed no change in the serum 270 minutes after shock. (4) Substantially high elevation of catecholamines, temporal increase in free fatty acid and slight increase in serum triglycerides were observed during the experimental period. The hemorrhagic shock seems to disturb the regulation of serum HDL levels and its constituents

Austenite memory during reverse transformation of steels at different heating rates

The austenite (gamma) structure reversely transformed from martensite in Fe-0.55C mass% C alloy was investigated at high temperatures using in-situ an electron backscatter diffraction (EBSD) method. When the heating rate was varied, a rapidly heating produced fine gamma grains, in contrast, a slow heating induced coarse gamma grains having the same crystal orientations as those of the prior gamma grains; known as "gamma memory". The most likely mechanism for the gamma memory could be variant restrictions owing to cementite (theta). To investigate the effect of theta on the gamma memory, the sample was tempered at 700 degrees C for 24 h and theta was precipitated. The tempered sample exhibited the gamma memory irrespective of the heating rate. To clarify the origin of the gamma memory, we focused on the reversely transformed gamma formed adjacent to the theta and directly observed the orientation relationships (ORs) using the in-situ EBSD. A crystallographic analysis on the between neighboring ferrites (alpha), theta, and gamma revealed the existence of Kurdjumov-Sachs OR between gamma and two alpha (alpha 1 and alpha 2), Isaichev OR between alpha and theta, and Pitsch OR between theta and gamma. In the all possible combinations, the reversely transformed gamma satisfying the K-S OR for two alpha variants was limited to four variants. The theta variant satisfying the Isaichev OR for alpha 1 and alpha 2 was limited to one variant, which was close to one of the four variants by Pitsch OR, which suggests the gamma memory is due to these variant restrictions among alpha-theta-gamma

肝静脈－股動脈間の血流中に起る高比重リポ蛋白及びその亜分画構成成分の変化

The difference in HDL-lipid constituents was examined in sera from the hepatic vein and femoral artery. In HDL, HDL2 and HDL3 the most pronounced difference existed in the triglyceride concentration which was significantly higher in the femoral artery as compared to the hepatic vein. The cholesterol and phospholipid concentrations of HDL2 alone but not of HDL3 were also significantly higher in the femoral artery than hepatic vein. The concentrations of apo A-I and A-II, on the other hand, remained unaltered in the blood circulation. These results, in combination with the finding of a significant decrease in triglycerides of VLDL and LDL fraction (d. = 1.006－1.063) in the femoral artery as compared to the hepatic vein suggest that the accumulation of triglycerides in HDL is due to their transfer from other triglyceride-rich lipoprotein and the accumulation of HDL2b occurs in the blood stream from the hepatic vein to the femoral artery

Effects of Fine Precipitates on Austenite Grain Refinement of Micro-alloyed Steel during Cyclic Heat Treatment

The effects of fine precipitates on the austenite grain refinement of micro-alloyed steel during cyclic heat treatment were investigated under different solution treatments. After three rounds of cyclic heat treatment of A(c3) and A(r3) transformations of the as-received steel rod with rapid heating and cooling, the austenite grain size was 3-10 mu m. On the other hand, three rounds of cyclic heat treatment after solution treatment at 1 300 degrees C reduced the austenite grain size to 2-5 mu m. The as-received sample included AIN-Ti(C,N)-MnS composite particles with a mean diameter of 30 nm and a number density of 11 mu m(-3), and the mean diameter did not change during cyclic heat treatment. Thus, it was considered that the reduction in austenite grain size without solution treatment was caused by the increase in the nucleation site of austenite phase with increasing number of cycles, due to the refinement of the prior austenite grains with martensitic structure during the cyclic heat treatment. When solution-treated at 1 300 degrees C, the AIN-Ti(C,N)-MnS composite particles were solved, and they were precipitated during the cyclic heat treatment with a mean diameter of 12 nm and an increased number density of 85 mu m(-3). Thus, it was considered that the further reduction in austenite grain size with solution treatment was caused by the pinning effect of the fine precipitates, in addition to the increase in the number of austenite phase nucleation sites with increasing number of heat treatment cycles