Search results for "door"

Building natural science learning through youth science camps

2018

This study focuses on a youth science camp for pupils in sixth to ninth grades that is organized annually by the University of Jyväskylä, Finland. The main idea of the science camp is to learn to do guided inquiry in nature. The study investigates the significance of science camp for encouraging young participants to learn science and how the camp supports their learning. The research method used was a survey. Altogether, 47 youth participated in the camp in 2012 and 2013. The results show that the participants wanted to learn more about science than secondary school could offer, and science camp had a positive impact on their interest in science. It was possible to introduce important conc…

Polycyclic aromatic hydrocarbons (PAHs) in indoor emission from decorative candles

2011

Abstract This study investigates PAHs indoor emissions from burning decorative candle in an indoor environment because emissions from burning wax in home have rarely been addressed. A total of 12 air samples were collected during the entire burning period of the decorative candles. Particulate and gaseous PAHs emissions were simultaneously measured by passing effluent through a filter (to collect particulate-phase PAHs), a cold trap and ORBO 43 tubes (to capture gaseous-phase PAHs). Analysis involved ultrasound extraction, followed by gas chromatography–mass spectrometry (GC–MS). The measured total PAHs concentration (particulate + aqueous phase + gas phases) for the candles, reported as ma…

Determination of indoor air quality of a phytosanitary plant.

2011

A new methodology has been developed to determine volatile organic compounds (VOCs) and pesticides in ambient air using membrane based devices as passive samplers. Pesticides were determined by gas chromatography with mass spectrometry detection (GC-MS) after their microwave-assisted extraction (MAE) from the passive sampler and the required clean-up. On the other hand, VOCs were also caught with the same samplers and directly determined by head space (HS) coupled to GC-MS. The use of samplers filled with florisil and activated carbon allows us to catch with a simple device both, VOCs and pesticides, with a high vapor pressure. Results obtained in the deployment of samplers in different sit…

Maximum exposure levels for xylene, formaldehyde and acetaldehyde in cars.

2004

Although millions of individuals are exposed to emissions from articles inside cars, relatively little has been published about possible adverse health effects and about exposure levels that can be considered safe or "acceptable". Xylene, formaldehyde and acetaldehyde represent typical examples of relevant volatile organic substances (VOC) released from articles inside cars. Recently, a concept for derivation of maximum exposure levels for volatile organic substances in cars has been published. In the present study we applied this concept to derive maximum exposure levels for xylene, formaldehyde and acetaldehyde and compared the resulting concentrations to exposure levels usually found ins…

Platinum in indoor settled dust matter (homes and cars)

2015

Abstract This paper presents a method for Pt analysis in indoor (homes and cars) settled dust, used as passive samplers, and the results relative to samples collected in the Sicilian area are used to evaluate the magnitude and distribution of concentrations inside common environments and the possible origins of the considered contaminant. The concentrations of platinum in settled indoor dust were measured by differential pulsed voltammetry (DPV). Concentrations of Pt in homes are in the range from 30 to 1460 μg kg − 1 d.w. while, in the vehicles from 30 to 1750 μg kg − 1 d.w. Considering the geoaccumulation index (I geo ), 42% of the settled dust sampled in homes could be classified as extr…

Prevention of indoor and outdoor pollution

2013

Vecākā pirmsskolas vecumposma bērnu izziņas intereses sekmēšanas iespējas brīvdabas pedagoģijā

2021

Darba nosaukums: Vecākā pirmsskolas vecumposma bērnu izziņas intereses sekmēšanas iespējas brīvdabas pedagoģijā. Darba autors: Oļesja Ščeglova Darba vadītājs: Tija Zīriņa Darba mērķis ir izzināt izziņas intereses sekmēšanas iespējas brīvdabas pedagoģijā vecākajā pirmsskolas vecumā. Darba mērķa sasniegšanai vecākā pirmsskolas vecmposma bērniem tika radīta atklājumiem atbilstoša brīvdabas vide, ar iespēju pašvadīti veikt praktisko darbu un eksperimentēt. Darba autore izvirzīja hipotēzi, ka vecākā pirmsskolas vecumposma bērnu izziņas intereses sekmēšana brīvdabas pedagoģijā būs sekmīga, ja skolotājs rada situāciju un pielāgo vidi, kurā bērnam rodas dabiska interese un vajadzība apgūt zināšanas…

A procedure to evaluate the indoor global quality by a sub objective-objective procedure

2013

This paper proposes two complementary procedures for assessing the indoor global comfort: the first one, prevalently objective, is based on the acquisition of microclimate measured data and computed subjective values; the second one, that is purely subjective, uses a questionnaire drawn from the ISO/DP 10551 Recommendation. An application to some lecture-halls is here showed

Convenience Behavior and Being Overweight in Adults: Development and Validation of the Convenience Behavior Questionnaire

2019

The etiology of overweight and obesity is a mixture of genetic determinants, environmental factors, and health behaviors. Especially intra- and interpersonal inactive behaviors, here termed convenience, seems to play an important role. The objective was to develop and validate the Convenience Behavior Questionnaire (CBQ) to assess convenience-related items and their association with overweight and obesity in a large population. A sample of 1233 subjects aged 18–82 years from six population groups took part in a self-administered questionnaire. Test-retest reliability was estimated and the independent association between convenience-related items and overweight and obesity was investigated. …

Immediacy and distance in teacher talk—A comparative case study in German elementary- and outdoor school-teaching

2017

This case study examines authentic speech acts by a German primary school teacher in the classroom context and the outdoor learning location of a forest. The study will compare the degree of linguistic immediacy or distance in these two contexts, respectively. Once a week, the class is doing “outdoor school” [Draußenschule] in places of natural or cultural interest near to their school. The structural change in the teaching environment means a change in the communication setting. The question arises if the teacher speaks to the students differently indoors than outdoors. The theoretical reference framework for the study is provided by the linguistic model “language of immediacy and language…