Search results for "kani"
showing 10 items of 311 documents
A synthesis of deimatic behaviour
2022
Deimatic behaviours, also referred to as startle behaviours, are used against predators and rivals. Although many are spectacular, their proximate and ultimate causes remain unclear. In this review we aim to synthesise what is known about deimatic behaviour and identify knowledge gaps. We propose a working hypothesis for deimatic behaviour, and discuss the available evidence for the evolution, ontogeny, causation, and survival value of deimatic behaviour using Tinbergen's Four Questions as a framework. Our overarching aim is to direct future research by suggesting ways to address the most pressing questions in this field. peerReviewed
Non-uniformity of displacement and strain within the Achilles tendon is affected by joint angle configuration and differential muscle loading.
2020
Although the Achilles tendon (AT) has been studied for more than a century, a complete understanding of the mechanical and functional consequences of AT structural organization is currently lacking. The aim of this study was to assess how joint angle configuration affects subtendon displacement and strain of soleus (SOL) and lateral gastrocnemius (LG) muscles. Knots sutured onto SOL and LG subtendons of 12 Wistar rats, were videotaped to quantify displacements and the ankle torque was assessed for different isometric activation conditions (i.e., individual and simultaneous) of the triceps surae muscles. Changing ankle and knee joint angle affected the magnitude of displacement, relative dis…
Exploring basic hope as a mediator between attitudes towards religion and psychological well-being among Anglicans
2022
Celem niniejszego badania jest sprawdzenie mediacyjnej roli nadziei podstawowej w związku postaw wobec religii z dobrostanem psychicznym w próbie anglikanów. Ponieważ wcześniejsze badania wskazywały na bliskie związki między religijnością, nadzieją i dobrostanem, powyższe założenie jest wysoce prawdopodobne. W badaniu wzięło udział 176 osób (89 kobiet i 87 mężczyzn). Wszyscy byli członkami Kościoła anglikańskiego i wypełnili trzy kwestionariusze: Skalę Przekonań Postkrytycznych (PCBS), Skalę Dobrostanu Psychicznego (PWB) oraz Inwentarz Podstawowej Nadziei (BHI-12). Wyniki wykazały, że wszystkie cztery postawy wobec religii były związane z nadzieją podstawową: ortodoksja i wtórna ufność były…
Contribution and effectiveness of ski and pole forces in selected roller skiing techniques on treadmill at moderate inclines
2023
BackgroundMost of the studies about the effects of incline on cross-country skiing are related to the metabolic efficiency. The effective skiing biomechanics has also been indicated to be among the key factors that may promote good performance. The aims of this study were to provide biomechanical characteristics and investigate the relative contribution and effectiveness of ski and pole forces in overcoming the total external resistance with double poling (DP) and Gear 3 (G3) techniques at varying moderate uphill inclines.Methods10 male cross-country skiers participated in this study. Custom-made force measurement bindings, pole force sensors, and an 8-camera Vicon system were used to colle…
Propulsion Calculated by Force and Displacement of Center of Mass in Treadmill Cross-Country Skiing
2022
This study evaluated two approaches for estimating the total propulsive force on a skier’s center of mass (COM) with double-poling (DP) and V2-skating (V2) skiing techniques. We also assessed the accuracy and the stability of each approach by changing the speed and the incline of the treadmill. A total of 10 cross-country skiers participated in this study. Force measurement bindings, pole force sensors, and an eight-camera Vicon system were used for data collection. The coefficient of multiple correlation (CMC) was calculated to evaluate the similarity between the force curves. Mean absolute force differences between the estimated values and the reference value were computed to evalua…
Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
2013
Interpolated twitch technique is a method frequently used to assess voluntary activa- tion. This method uses electrically evoked twitch superimposed on the voluntary activi- ty and its comparison with the twitch in rested muscle i.e. control twitch, to evaluate completeness of muscle activation. The purpose of this study was to investigate the ef- fect of interval in paired stimulation on control twitch in young and elderly individuals with bent and flexed knee positions. Supramaximal electrical stimulation consisted of one single stimulus and eight paired stimulation with intervals from 5 to 40ms, with increments of 5ms. In evoked twitches normalized peak torque amplitude (NPT), time to pe…
Reguły działania a argumentacja
2016
Argumentacja niemonotoniczna ma być blisko rozumowań praktycznych i zdroworozsądkowych: wykonawcy czynności (agenci) opracowują plany działań i starają się plany te wykonać; często jednak są pozbawieni pełnego opisu sytuacji, ich wiedza jest cząstkowa, czynią założenia i podejmują decyzje oraz działania, w tym działania słowne, polegając na własnym doświadczeniu i nawykach. Powstające formalne struktury obejmują tzw. cyrkumskrypcje (circumscriptions), logikę domyśleń (default logic), logikę autoepistemiczną (autoepistemic logic), konsekwencje kumulatywne (cumulative consequences) i szereg innych. Można wyodrębnić dwa główne typy systemów rozumowań niemonotonicznych: systemy defi niowalne po…
On the mechanical stability and out-of-plane dynamics of a travelling panel submerged in axially flowing ideal fluid : a study into paper production …
2011
Ryhmäostaminen elektronisessa B2C -kaupankäynnissä
2012
Summanen, Antti Ryhmäostaminen elektronisessa B2C -kaupankäynnissä Jyväskylä: Jyväskylän yliopisto, 2012, 24 s. Tietojärjestelmätiede, kandidaatin tutkielma Ohjaaja: Makkonen, Markus Ryhmäostaminen on merkittävä uudistus verkkokauppojen hinnoittelussa vuosituhannen vaihtuessa. Tässä uudessa hinnoittelumekanismissa asiakkaalla on mahdollisuus vaikuttaa tuotteen hinnoitteluun ja myyjä voi samalla saavuttaa merkittävää etua myyntimäärien kasvaessa. Ryhmäostaminen hyödyntää tehokkaasti asiakkaiden omia verkostoja markkinoinnissa, käyttäen viestintäkanavina internetiä ja sosiaalisen median palveluita. Tässä tutkielmassa tarkastellaan ryhmäostamista hinnoittelumekanismina ja osana verkkokaupan ma…
A Comparison of Methodological Approaches to Measuring Cycling Mechanical Efficiency
2019
Background: Much is known about theoretical bases of different mechanical efficiency indices and effects of physiological and biomechanical factors to them. However, there are only a few studies available about practical bases and interactions between these efficiency indices, which were the aims of the present study. Methods: Fourteen physically active men (n = 12) and women (n = 2) participated in this study. From the incremental test, six different mechanical efficiency indices were calculated for cycling work: gross (GE) and net (NE) efficiencies, two work efficiencies (WE), and economy (T) at 150 W, and in addition delta efficiency (DE) using 3–5 observation points. Results: It was fou…