Search results for "Open"

Does taking additional Maths classes in high school affect academic outcomes?

2023

Several studies in the mathematical education literature show the effect of students’ high school skills in maths on their success at higher levels of education and work. In particular, the importance of maths course taking in US high schools is highlighted to be important for college enrolment and completion. The choice of taking additional maths courses or, as in Italy, of choosing a high-school curriculum with more maths, is not random: it depends on several substantial factors such as gender and socio-economic status. This selection bias implies that the differences in the academic outcomes might be traceable not only to mathematics ability and knowledge. In this paper, the aim is to es…

Sarcopenia and appendicular muscle mass as predictors of impaired fasting glucose/type 2 diabetes in elderly women

2021

Elderly women exhibit a high risk of type 2 diabetes (T2D), but no definitive data exist about the possible role of postmenopausal increases in visceral adiposity, the loss of lean body mass, or decreases in the sum of the lean mass of arms and legs (appendicular skeletal muscle mass (ASMM)). This retrospective, longitudinal study investigated whether body composition (bioelectrical impedance analysis) predicted the development of impaired fasting glucose (IFG) or T2D in a cohort of 159 elderly women (age: 71 ± 5 years, follow-up: 94 months) from southern Italy (Clinical Nutrition and Geriatric Units of the “Mater Domini” University Hospital in Catanzaro, Calabria region, and the “P. Giacco…

Age and gender differences in half-Ironman triathlon performances - the Ironman 70.3 Switzerland from 2007 to 2010

2012

Beat Knechtle,1,2 Christoph Alexander Rüst,2 Thomas Rosemann,2 Romuald Lepers31Gesundheitszentrum St Gallen, St Gallen, Switzerland; 2Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland; 3INSERM U1093, Faculty of Sport Sciences, University of Burgundy, Dijon, FranceBackground: To date, the age-related decline and gender differences in performance have been investigated for both Olympic and Ironman distance triathlons, but not for the intermediate distance (ie, the half-Ironman distance triathlon covering 1.9 km swimming, 90 km cycling and 21.1 km running, Ironman 70.3®). We determined the age-related differences in performan…

Performance and age of African and non-African runners in half- and full marathons held in Switzerland, 2000–2010

2013

André Aschmann,1 Beat Knechtle,2 Marco Cribari,1 Christoph Alexander Rüst,1 Vincent Onywera,3 Thomas Rosemann,1 Romuald Lepers4 1Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland; 2Gesundheitszentrum St Gallen, St Gallen, Switzerland; 3Department of Recreation Management and Exercise Science, Kenyatta University, Kenya; 4Institut National de la Santé et de la Recherche Médicale, Faculty of Sport Sciences, University of Burgundy, Dijon, France Background: Endurance running performance of African (AF) and non-African (NAF) athletes is investigated, with better performances seen for Africans. To d…

Closure to Discussion on “Sequent depth ratio of a B- jump” by Ohtsu and Yasuda

2013

Prese urbane. Studi di enunciazioni cittadine

2017

Distinguished and diverse theorists such as Benveniste, Barthes, De Certeau and Lotman have each approached the city in different ways. But while several key differences exist between them, their points of view intertwine around the concept of urban enunciation and intersect at differing points. In this study, the positions of these authors will be presented, compared and elaborated upon and the categories of linguistic enunciation of urban space will be set out, drawing from a vision of translation between languages that frequently leads, as is so often the case in Semiotics, to productive analytical models. The linguistic signs of the city will also be illustrated by examples of "short fo…

Sarkopenian esiintyvyys ja vaikeusaste 70–85-vuotiailla henkilöillä (PASSWORD-tutkimus)

2022

Sarkopenia on ikääntymiseen liittyvä sairaus, joka johtaa lihaskatoon ja lihasvoiman heikkenemiseen ja on yksi tärkeimmistä terveysongelmista ikääntyneillä ihmisillä. Tämän tutkimuksen tarkoituksena oli selvittää sarkopenian esiintyvyyttä jyväskyläläisten iäkkäiden kotona asuvien väestössä. Sarkopenian esiintyvyyden arvioimiseksi henkilöt luokiteltiin lihasvoiman ollessa normaali ei sarkopenia ryhmään (ES), alentuneen lihasvoiman perusteella mahdollinen sarkopenia ryhmään (MS) ja alentuneen lihasvoiman sekä lihasmassan perusteella sarkopenia ryhmään (SR). Lisäksi ryhmien välisiä eroja tarkasteltiin iässä, kehonkoostumuksessa, toimintakyvyssä ja objektiivisesti mitatussa fyysisessä aktiivisu…

Highly Syndiotactic or Isotactic Polyhydroxyalkanoates by Ligand-Controlled Yttrium-Catalyzed Stereoselective Ring-Opening Polymerization of Function…

2017

International audience; Reported herein is the first stereoselective controlled ROP of a specific family of racemic functional β-lactones, namely 4-alkoxymethylene-β-propiolactones (BPL(OR) s). This process is catalyzed by an yttrium complex stabilized by a nonchiral tetradentate amino alkoxy bisphenolate ligand _ONOO(R'2) ₍2-) , which features both a good activity and a high degree of control over the molar masses of the resulting functional poly(3-hydroxyalkanoate)s. A simple modification of the R' substituents in ortho and para position on the ligand platform allows for a complete reversal from virtually pure syndioselectivity (Ps up to 0.91 with R'=cumyl) to very high isoselectivity (Pi…

Hormonikorvaushoito ja luurankolihaksisto : estrogeenisten ja progestogeenisten komponenttien vaikutukset lihassoluviljelmässä

2010

Yksi merkittävimmistä ikääntymiseen liittyvistä tapahtumista on luurankolihasten heikentyminen. Sarkopenia eli lihaskato heikentää ennen kaikkea ikääntyvän ihmisen terveyttä ja sitä kautta elämänlaatua, mutta sen kustannukset myös sosiaali- ja terveydenhuollolle ovat suuret. Naisilla lihasten suorituskyky heikkenee merkittävästi vaihdevuosien aikana, jolloin myös estrogeenin ja progesteronin tasot laskevat. Etenkin 17β-estradiolin (E2) tuotanto munasarjoissa loppuu vaihdevuosien aikana. Estrogeenin tiedetään vaikuttavan primaaristen sukupuoliominaisuuksien lisäksi myös moniin muihin kudoksiin, kuten luuhun ja lihaksiin. Vaihdevuosien mukanaan tuomia oireita hoidetaan usein estradiolia ja pr…

Aging of the musculoskeletal system: How the loss of estrogen impacts muscle strength.

2019

Skeletal muscle weakness occurs with aging and in females this is compounded by the loss of estrogen with ovarian failure. Estrogen deficiency mediates decrements in muscle strength from both inadequate preservation of skeletal muscle mass and decrements in the quality of the remaining skeletal muscle. Processes and components of skeletal muscle that are affected by estrogens are beginning to be identified. This review focuses on mechanisms that contribute to the loss of muscle force generation when estrogen is low in females, and conversely the maintenance of strength by estrogen. Evidence is accumulating that estrogen deficiency induces apoptosis in skeletal muscle contributing to loss of…