Quadriceps muscle blood flow and oxygen availability during repetitive bouts of isometric exercise in simulated sailing

Abstract

In this study, we wished to determine whether the observed reduction in quadriceps muscle oxygen availability, reported during repetitive bouts of isometric exercise in simulated sailing efforts (i.e. hiking), is because of restricted muscle blood flow. Six national-squad Laser sailors initially performed three successive 3-min hiking bouts followed by three successive 3-min cycling tests sustained at constant intensities reproducing the cardiac output recorded during each of the three hiking bouts. The blood flow index (BFI) was determined from assessment of the vastus lateralis using near-infrared spectroscopy in association with the light-absorbing tracer indocyanine green dye, while cardiac output was determined from impedance cardiography. At equivalent cardiac outputs (ranging from 10.3±0.5 to 14.8±0.86 L · min^?1), the increase from baseline in vastus lateralis BFI across the three hiking bouts (from 1.1±0.2 to 3.1±0.6 nM · s^?1) was lower (P = 0.036) than that seen during the three cycling bouts (from 1.1±0.2 to 7.2±1.4 nM · s^?1) (Cohen's d: 3.80 nM · s^?1), whereas the increase from baseline in deoxygenated haemoglobin (by ～17.0±2.9 μM) (an index of tissue oxygen extraction) was greater (P = 0.006) during hiking than cycling (by ～5.3±2.7 μM) (Cohen's d: 4.17 μM). The results suggest that reduced vastus lateralis muscle oxygen availability during hiking arises from restricted muscle blood flow in the isometrically acting quadriceps muscles.     

Experiencing multiculturalism in Greek‐Cypriot primary schools

Within the context of a monocultural and monolingual education system, this paper seeks to explore and compare the experiences of Cypriot and non‐Cypriot pupils in Greek‐Cypriot primary schools with culturally diverse pupil populations. The concept of multiculturalism has been introduced only very recently in Cyprus and there has been little research on pupils’ experience and understanding of multiculturalism. Using a narrative approach, this inquiry seeks to provide an understanding of the experience of studying in multicultural primary school classrooms. The pupils of two classrooms, aged between 10 and 12, describe their experience through terms such as new knowledge, religion, language, racism and stereotypes.     

Using different art forms to investigate the impact on children’s involvement in literacy activities

Much of the research into factors that affect children’s school performance has focused on parental involvement rather than the nature of children’s activities undertaken in school. More research is therefore needed to examine the kinds of activities that affect performance and, in particular, whether the degree of involvement children experience in those activities can affect school performance. Children in free play often choose to be involved in arts activities so the arts could be considered as a promising approach. The purpose of this paper is to investigate the effects of ‘Play and Learn through the Arts’ programme on children’s involvement during literacy activities in five- to six-year-old children. It was examined if the arts in general or a specific art form could contribute more to children’s involvement in literacy activities. Children from four different settings participated in this study. To measure the outcome of the intervention the LIS-YC was used and items such as children’s concentration, persistence and precision were measured. The findings were analysed using a mixed method approach and showed significant benefits in all the items in children’s levels of involvement in the arts group over the control group and no difference in effects among the different art forms.     

Language and preliteracy skills in bilinguals and monolinguals at preschool age: effects of exposure to richly inflected speech from birth

Language proficiency before school entry has proven to be a powerful predictor of literacy development. This longitudinal study examined how simultaneous exposure to two richly inflected languages from birth contributes to the development of language-related literacy precursors at preschool age compared to peers exposed to one language. The community language turned out to be the stronger language of the bilinguals by 4 years of age and to a great extent age-appropriate compared to monolingual peers. The same initial exposure conditions resulted in three bilingual and two monolingual language proficiency profiles. For the bilinguals changes in the proportion of exposure to two home languages and frequency of language-specific social interactions explained proficiency in each language, whereas for the monolinguals exposure did not explain language proficiency. Our findings give support for the primary impact of exposure on the development of bilingualism and preliteracy skills.     

Conquering the World: The ‘Martial’ Power of Japan Goes Global

Abstract

Throughout the twentieth century Japanese martial arts, or budo, in the West grew from a hardly visible practice for Japanese diasporas and a handful of Japanophiles to an integral part of Western culture. Today, when they have been joined by other cultural exports from Japan, and Karate has been recognized as an Olympic sport in the midst of the decline of traditional martial arts and the rise of Mixed Martial Arts culture, the question of what forces produce such powerful ‘waves’ of Japanese cultural expansion becomes relevant again. To answer this question, the article compares the forces behind the spread of three arguably most popular Japanese martial arts – Judo, Kendo, and Karate – in the West, mainly in America and Europe. Here I offer an analysis based on the division of these forces into those which ‘push’ Japanese culture beyond Japan’s borders (pushing forces) and those which stimulate its consumption in Western countries (pulling forces). Based on the results of the comparison, the article argues that there are certain repeating patterns in both types that form a unique mechanism of Japanese ‘martial’ expansion to the West, with the ‘pulling’ forces being just as, if not more, powerful, than the ‘pushing’ forces.     

Schematisation of Concepts. A teaching strategy for environmental education implementation in a water module third grade students in junior high school (gymnasium-15 years old)

This article reports how a teaching strategy schematisation of concepts could influence the learning capability of third grade junior high school students. The teaching was planned and implemented within the framework of environmental education. A water module, water and its relationship with nature and contemporary man, was chosen for the teaching session. The study involved the participation of 171 third grade junior high school students (15 years of age), attending public schools in Athens and Thessaloniki. The sample was divided into an experimental group (N =84) and a control group (N= 87). The results of the investigation showed that the teaching strategy schematisation of concepts had a positive influence on the capability of junior high school students to structure: (a) causal relations of one link; (b) successive linear causal relations of more than one link; and (c) complex causal relations.     

Multiculturalism,Diversity, and Social Advocacy: A 17‐Year Content Analysis of Counselor Education and Supervision

The authors summarized (a) data regarding multiculturalism, diversity, and social advocacy represented in Counselor Education and Supervision (CES) over a 17‐year period (1989–2005, Volumes 28–45); (b) type of articles (i.e., research vs. theory) represented; (c) research methodology and applications used; (d) journal editor and related terms; (e) primary contributors and related institutional affiliations; and (f) the breadth and scope of the data regarding key topics represented. Seventy‐eight articles met inclusion criteria. Data indicate the extent to which multiculturalism, diversity, and social advocacy were represented in CES.