A BODY MASS DEPENDENT MECHANICAL IMPEDANCE MODEL FOR APPLICATIONS IN VIBRATION SEAT TESTING

2002 ◽  
Vol 253 (1) ◽  
pp. 243-264 ◽  
Author(s):  
P.-É. BOILEAU ◽  
S. RAKHEJA ◽  
X. WU
Keyword(s):  
Body Mass ◽  
Mechanical Impedance ◽  
Impedance Model ◽  
Mass Dependent

scholarly journals Development of a Mechanical Impedance Model-Based Computer Simulator for Evaluation of an Active Headrest Mechanism in Rear-End Impact

2013 ◽  
Vol 6 (1) ◽  
pp. 73-88 ◽  
Author(s):  
Yoshiyuki TANAKA ◽  
Shunsuke FUKUSHIMA ◽  
Masaya YAMASHITA ◽  
Yoshinobu OOTANI ◽  
Toshio TSUJI
Keyword(s):  
Mechanical Impedance ◽  
Impedance Model ◽  
Computer Simulator ◽  
Model Based

scholarly journals Predicting the Dynamic Stiffness of a Glove Material using Mechanical Impedance Model

2019 ◽  
Vol 1262 ◽  
pp. 012028
Author(s):  
K. A. Md Razali ◽  
R. Samin ◽  
A. As’arry ◽  
N. A. A. Jalil
Keyword(s):  
Dynamic Stiffness ◽  
Mechanical Impedance ◽  
Impedance Model

scholarly journals Seasonal and Diurnal Body-Mass Fluctuations for two Nonhoarding Species of Parus in Sweden Modeled Using Path Analysis

The Auk ◽  
2003 ◽  
Vol 120 (3) ◽  
pp. 658-668
Author(s):  
Pekka T. Rintamäkt ◽  
Jon R. Stone ◽  
Arne Lundberg
Keyword(s):  
Path Analysis ◽  
Predation Risk ◽  
Body Mass ◽  
Great Tit ◽  
Energy Reserves ◽  
Blue Tit ◽  
Passerine Species ◽  
State Dependent ◽  
Mass Dependent ◽  
Winter Fattening

Abstract According to the hypothesis that has been invoked most frequently to explain seasonal fattening patterns for birds—the “adaptive winter-fattening hypothesis”—individuals respond to worsening foraging conditions by increasing body mass and energy reserves. Two hypotheses have been proposed equally frequently to explain daily weight gain patterns for birds: according to the “state-dependent foraging hypothesis,” energy reserves should be amassed early during the day, when starvation risk increases; according to the “mass-dependent predation-risk hypothesis,” mass gain should be delayed for as long as possible, to minimize predation risk. Those hypotheses have been tested previously, using statistical methods (e.g. multiple-regression analysis) that assume independence among environmental variables (e.g. photoperiod and temperature). We conducted path analyses that included four predictor variables (day-in-season, hour-in-day, mean daily temperature, and daily precipitation) to model body-mass fluctuations for two small, nonhoarding (noncaching) passerine species that inhabit central eastern Sweden. Data were partitioned hierarchically into species, age class, gender, and season subgroups. As reported in many small passerine species studies, body mass increased during the day and maximized at dusk; over seasons, body mass increased during autumn, maximized by midwinter, and declined toward breeding in spring. Path analysis models accounted for 9.5–49.9% (mean 26.3%) for Blue Tit (Parus caeruleus) body mass variance and 1.8–52.3% (mean 16.8%) for Great Tit (P. major) body mass variance; for both species, accountability was lowest for autumn (Blue Tit,12.2%; Great Tit, 7.3%), highest for winter (Blue Tit, 33.4%; Great Tit, 21.9%), and intermediate for spring (Blue Tit, 22.7%; Great Tit, 11.8%); for Blue Tits, it was greater for adults than for juveniles (33.2 and 21.7%); whereas negligible for Great Tits (15.9 and 17.3%) and slightly greater for males than for females (Blue Tit, 27.4 and 23.5%; Great Tit, 23.1 and 21.3%). Those results are consistent with predictions formulated on the basis of the adaptive winter-fattening, partially with state-dependent foraging, and, possibly, mass-dependent predation-risk hypothesies and reveal that body-mass fluctuations are associated to a greater extent with photoperiod than with temperature.

Age and body mass dependent changes in acute insulin response in polycystic ovary syndrome

2000 ◽  
Vol 50 ◽  
pp. 104-105
Author(s):  
MirjanaS. Sumarac-Dumanovic ◽  
DraganD. Micic ◽  
DjuroP. Macut ◽  
Aleksandra Kendereski ◽  
Svetlana Zoric ◽  
...  
Keyword(s):  
Polycystic Ovary Syndrome ◽  
Body Mass ◽  
Polycystic Ovary ◽  
Insulin Response ◽  
Acute Insulin Response ◽  
Ovary Syndrome ◽  
Mass Dependent

scholarly journals Sex-specific covariance between metabolic rate, behaviour and morphology in the ground beetle Carabus hortensis

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12455
Author(s):  
Elisabeth Yarwood ◽  
Claudia Drees ◽  
Jeremy E. Niven ◽  
Wiebke Schuett
Keyword(s):  
Body Size ◽  
Metabolic Rate ◽  
Body Mass ◽  
Ground Beetle ◽  
Exploratory Behaviour ◽  
Temperature Dependent ◽  
Sexual Dimorphisms ◽  
Individual Fitness ◽  
Body Sizes ◽  
Mass Dependent

Background Individuals within the same species often differ in their metabolic rates, which may covary with behavioural traits (such as exploration), that are consistent across time and/or contexts, and morphological traits. Yet, despite the frequent occurrence of sexual dimorphisms in morphology and behaviour, few studies have assessed whether and how sexes differ in metabolic trait covariances. Methods We investigated sex-specific relationships among resting or active metabolic rate (RMR and AMR, respectively) with exploratory behaviour, measured independently of metabolic rate in a novel environment, body size and body mass, in Carabus hortensis ground beetles. Results RMR, AMR and exploratory behaviour were repeatable among individuals across time, except for male RMR which was unrepeatable. Female RMR neither correlated with exploratory behaviour nor body size/body mass. In contrast, AMR was correlated with both body size and exploratory behaviour. Males with larger body sizes had higher AMR, whereas females with larger body sizes had lower AMR. Both male and female AMR were significantly related to exploratory behaviour, though the relationships between AMR and exploration were body mass-dependent in males and temperature-dependent in females. Discussion Differences between sexes exist in the covariances between metabolic rate, body size and exploratory behaviour. This suggests that selection acts differently on males and females to produce these trait covariances with potentially important consequences for individual fitness.

Body-mass-dependent cost of web-building behavior in an orb weaving spider, Zygiella x-notata

2003 ◽  
Vol 90 (6) ◽  
pp. 269-272 ◽  
Author(s):  
Samuel Venner ◽  
Marie-Claude Bel-Venner ◽  
Alain Pasquet ◽  
Raymond Leborgne
Keyword(s):  
Body Mass ◽  
Building Behavior ◽  
Web Building ◽  
Mass Dependent

scholarly journals Mechanical Impedance Analysis of a Novel MEMS Photon Force Sensor

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 921
Author(s):  
Karolina Orłowska ◽  
Wojciech Majstrzyk ◽  
Andrzej Sierakowski ◽  
Tomasz Piasecki ◽  
Teodor Gotszalk
Keyword(s):  
Pressure Effect ◽  
Mechanical Impedance ◽  
Impedance Analysis ◽  
Force Sensor ◽  
Laser Vibrometer ◽  
Radiation Beam ◽  
Impedance Model ◽  
Mems Sensor ◽  
Thermal Actuation ◽  
Low K

In this work we present how to describe mechanical impedance of a photon force (PF) MEMS sensor dedicated to structures’ optomechanical studies. An actuating force (photon force) is caused by the reflection and absorption of the electromagnetic radiation beam due to the radiation pressure effect. Specially designed very soft (low k-constant, ca 10–150 mN/m) cantilevers are presented. The structures integrate a Lorentz loop, which enables electromagnetic actuation. The construction with two mirrors is proposed so that parasitic thermal actuation can be neglected. The MEMS displacement is measured with the use of a laser vibrometer. The mechanical impedance model is presented using which the stiffness is calculated. As validation measurements: thermal noise and known mass adding methods are used.

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