Search results for "HD"

On-chip purification of arc-discharge synthesized multiwalled carbon nanotubes via mobile liquid interface

2017

This thesis reports a novel approach for purification of carbon nanotube (CNT) samples deposited on smooth silicon substrates through a mobile liquid interface interacting with carbonaceous debris particles that contaminate the deposition. The method is based on physical interaction of the particles and the three-phase contact line via capillary interface forces, i.e. the surface tension, which results in the detachment of chemically indispersible colloids from the sample surface. In the experiments reported in this work, we focus primarily on arc-discharge grown multi-walled carbon nanotubes, whose synthesis is particularly plagued by carbonaceous debris that is difficult to remove without h…

Habitat area and local habitat conditions outweigh fragmentation effects on insect communities in vineyards

2022

Fragmentation of habitat, for example by intensive agricultural practices, can be detrimental to local biodiversity. However, it often remains unclear whether such biodiversity declines are caused by loss of habitat area or increased fragmentation, and how habitat quality factors into it. In our study system, vegetated vineyards are typically small, and isolated from one another, potentially limiting the distribution and dispersal of organisms. In a full-factorial experiment of a priori selected vegetated vineyard patches of differing size and fragmentation, we aimed to disentangle the effects of habitat area (area of vegetated vineyards), habitat fragmentation (number of vegetated vineyard…

Kilka uwag o skutkach odstąpienia od umowy

2018

Effect of Ending the Nationwide Free School Fruit Scheme on the Intake of Fruits, Vegetables, and Unhealthy Snacks in Norwegian School Children Aged …

2023

The Norwegian authorities started a nationwide free school fruit program in 2007, implemented in all secondary schools (grades 8–10) and combined schools (grades 1–10) in Norway. The program ended in 2014. This study evaluates the effect of ending the nationwide free school fruit program on the consumption of fruit, vegetables, and unhealthy snacks among Norwegian sixth and seventh graders. The study sample consists of pupils at 18 schools that participated in all data collections in the Fruits and Vegetables Make the Marks project (FVMM), initiated in 2001, with new data collections in 2008 and 2018. Four of the schools were combined schools, therefore children in sixth and seventh grade a…

ETHANOL DRINKING PATTERN DIFFERENTLY AFFECTS NOVELTY-RELATED BEHAVIOUR DURING ABSTINENCE IN FEMALE RATS

2014

Withdrawal from chronic ethanol leads to a multifaceted syndrome, characterized by negative affective state. Novelty seeking and motivation, closely related to affective state, can be assessed in rodents exploring behavioural response to novelty. This study aims at assessing novelty-related behaviour in female rats during ethanol withdrawal following different self-administration patterns. Female rats underwent 9-week-, 2-bottle choice-, continuous or intermittent (3 days/week) access to 20% ethanol; they were named CARs and IARs respectively. After 12h from last ethanol access, they were tested for locomotor activity induced by a novel environment; time spent in the central area of an open…

Futile Therapy versus Worthy Dying: Anthropological and Ethical Arguments

2020

Nowadays, issues related to the final stages of life stand more and more at the centre of problems relating to life and health, which result, for example, from the demographic situation in highly developed societies. In the last decades of the twentieth century, an explosion of therapeutic possibilities in the field of technical medicine has caused such questions to be voiced more and more frequently: Should humans try to live as long as possible, or should they live as long as they can with dignity and then die with dignity? Despite the seemingly obvious answer, there is still considerable medical and social resistance to the policy of discontinuing futile therapy. There are probably many …

Teachers’ occupational well-being in relation to teacher–student interactions at the lower secondary school level

2023

This study investigated the relation between teachers’ occupational well-being and the quality of teacher–student interactions in lower secondary schools in Finland. Teachers (N = 48) self-rated their occupational well-being in terms of engagement, stress, job demands, and emotional exhaustion. Teacher–student interactions in classrooms were video-recorded and coded with the Classroom Assessment Scoring System. The results of multivariate regression analyses showed that teachers who reported higher work-related stress were observed with a lower quality of emotional support, classroom organization, and instructional support when controlling for background factors. It is proposed that the obs…

Profiles of Work Engagement and Work-Related Effort and Reward Among Teachers: Associations to Occupational Well-Being and Leader–Follower Relationsh…

2022

This study examined teachers’ occupational well-being by identifying profiles based on teachers’ self-ratings of work engagement as well as work-related effort and reward. It also did so by examining whether the identified subgroups differed with respect to teachers’ self-reported occupational stress and emotional exhaustion as well as with respect to work-related resources such as the individual resource of work meaningfulness and the leader-level resource of the leader–follower relationship. The participants in the study were 321 Finnish elementary school teachers. The data were collected in spring 2021, that is, at the time when the COVID-19 pandemic was present, yet there were no nation…

The Path from Ethical Organisational Culture to Employee Commitment : Mediating Roles of Value Congruence and Work Engagement

2016

Following the Job Demands-Resources model’s motivational process, this study investigates the role of person-organisation fit and work engagement as mediating processes between ethical culture and employee commitment, where ethical culture is seen as an organisational resource. It was expected that the stronger the ethical values and practices are experienced to be, the more compatible employees feel with the organisation. A good person-organisation fit was further hypothesised to act as a personal job resource for the employees, who would consequently experience higher work engagement leading to stronger affective commitment and less turnover intentions. The study used questionnaire data g…

Back to Basics: The Relative Importance of Transformational and Fair Leadership for Employee Work Engagement and Exhaustion

2016

This study contributes to the literature on the supervisors’ role in employee well-being by drawing on two separate lines of research: transformational leadership and organizational justice. The purpose of the study was to investigate the unique contributions of transformational and fair leadership (justice behaviours of supervisors) on work engagement and exhaustion among employees within the framework of the Job Demands-Resources model (Bakker and Demerouti, 2007). In determining the unique contributions, we additionally acknowledged the role of work characteristics. A questionnaire study was conducted among Finnish municipal employees in a variety of occupations (N = 333, 87% women). The…