Search results for "AIH"

Analyysi vuosien 2008-2009 suhdannekäänteestä : tilastojen revisioista, käänteen uutisoinnista ja ennakoinnista

2012

Tässä pro gradu -työssä luodaan katsaus vuosien 2008–2009 suhdannekäänteeseen; siihen liittyneisiin ennusteisiin, haasteisiin ja valikoitujen tilastojen toimintaan. Lisäksi tarkastellaan Helsingin Sanomien uutisointia vuoden 2008 tammikuusta vuoden 2009 heinäkuuhun yhdessä Tilastokeskuksen tuottamien talousindikaattorien kanssa. Empiirisen osuuden aineiston muodostavat Tilastokeskuksen indikaattorit: neljännesvuositilinpito, tuotannon suhdannekuvaaja, kuluttajabarometri, teollisuuden uudet tilaukset, uudisrakentamisen volyymi-indeksi ja teollisuustuotannon volyymi-indeksi. Indikaattoreista tarkastellaan niissä tapahtuneita revisioita ja keskinäisiä suhteita. Havaitaan, että revisiot eivät m…

Female reproductive factors are associated with objectively measured physical activity in middle-aged women

2017

Physical activity improves health and may delay the onset of several chronic diseases. For women in particular, the rate of these diseases accelerates at middle age; therefore it is important to identify the determinants of health-enhancing physical activity during midlife in this population. In this study, we focused on determinants that are unique to the female sex, such as childbearing and menopause. The main objective was to characterize the level of physical activity and differences between active and inactive middle-aged Finnish women. In addition, we examined the association of physical activity with female reproductive factors at midlife. The study population consisted of 647 women …

Physical Performance During the Menopausal Transition and the Role of Physical Activity

2020

Abstract Background To examine longitudinal changes in physical performance during the menopausal transition and the role of physical activity (PA) in these changes. Methods Based on follicle-stimulating hormone levels and bleeding diaries, women (47–55 years) were classified as early (n = 89) and late perimenopausal (n = 143) and followed prospectively until postmenopausal status, with mean duration of 17.5 and 13.8 months, respectively. Physical performance was measured by handgrip force, knee extension torque, vertical jumping height, maximal walking speed, and 6-minute walking distance. Physical activity was self-reported and categorized as inactive, low, medium, and high. Longitudinal …

Hormonikorvaushoidon ja fyysisen aktiivisuuden yhteys kehon koostumukseen postmenopausaalisilla naisilla : 10 vuoden seurantatutkimus

2011

Tämän tutkielman tavoitteena oli selvittää, onko estrogeenia sisältävällä hormonikorvaushoidolla (HRT) ja fyysisellä aktiivisuudella (PA) yhteyttä ja yhteisvaikutusta kehon koostumukseen vaihdevuosi-ikäisillä naisilla. Selvityksen kohteena olivat myös HRT- ja liikuntaintervention vaikutusten säilyminen kehon koostumuksessa sekä fyysisessä aktiivisuudessa tapahtuvat muutokset 10 vuoden seurannan aikana. Tutkielman aineiston muodostivat 50-57 –vuotiaat vaihdevuosi-ikäiset naiset (n=47), jotka osallistuivat vuosina 1996-1997 Jyväskylän yliopistossa toteutettuun satunnaistettuun lume-kontrolloituun tutkimukseen. HRT:n ja PA:n yhteisvaikutuksen selvittämistä varten tutkittavat jaettiin neljään r…

Perimenopausal women show modulation of excitatory and inhibitory neuromuscular mechanisms.

2021

Background Menopausal transition exposes women to an early decline in muscle force and motor function. Changes in muscle quality and function, especially in lower limbs, are crucial, as they expose individuals to increased risk of falls. To elucidate some of the related neuromuscular mechanisms, we investigated cortical inhibition and peripheral muscle twitch force potentiation in women during the early and late stages of perimenopause. Methods Participants were 63 women aged 48–55 years categorized as early (EP, n = 25) or late (LP, n = 38) perimenopausal according to serum follicle-stimulating hormone (FSH) levels and menstrual diaries. EP women had an irregular menstrual cycle and FSH  2…

Metabolic health, menopause, and physical activity : a 4-year follow-up study

2022

Background In women, metabolic health deteriorates after menopause, and the role of physical activity (PA) in mitigating the change is not completely understood. This study investigates the changes in indicators of metabolic health around menopause and evaluates whether PA modulates these changes. Methods Longitudinal data of 298 women aged 48–55 years at baseline participating in the ERMA and EsmiRs studies was used. Mean follow-up time was 3.8 (SD 0.1) years. Studied indicators of metabolic health were total and android fat mass, waist circumference, waist-to-hip ratio (WHR), systolic (SBP) and diastolic (DBP) blood pressure, blood glucose, triglycerides, serum total cholesterol, and high…

Mathematical models and simulation of Costas loops

2013

Synthesis of phase-locked loop : analytical methods and simulation

2013

Phase-locked loops with active PI filter : the lock-in range computation

2016

Frequency and Density-Dependent Selection on Life-History Strategies - A Field Experiment

2008

Negative frequency-dependence, which favors rare genotypes, promotes the maintenance of genetic variability and is of interest as a potential explanation for genetic differentiation. Density-dependent selection may also promote cyclic changes in frequencies of genotypes. Here we show evidence for both density-dependent and negative frequency-dependent selection on opposite life-history tactics (low or high reproductive effort, RE) in the bank vole (Myodes glareolus). Densitydependent selection was evident among the females with low RE, which were especially favored in low densities. Instead, both negative frequency-dependent and density-dependent selection were shown in females with high RE…