Search results for "lines"

Prevention of venous thromboembolism in patients with cancer: guidelines of the Italian Society for Haemostasis and Thrombosis

2012

On research work in information systems: Guidelines, recommendations and examples

2021

The most positive aspect of science is that the participants (researchers, reviewers and editors) control and evaluate their work themselves. Therefore they must be supported in one way or another. Fortunately, guidelines have been developed for different methodologies. However, today the guidelines are not very applicable. The first two sets of guidelines published (both positivist studies) had unusual problems. In this work, we analyze and improve the guidelines generally. Previously, selecting a methodology was the task of every researcher. It now seems that every researcher must also conduct a literature review and write a report. We consider methodology, literature review and writing "…

Momentum-space structure of surface states in a topological semimetal with a nexus point of Dirac lines

2016

Three-dimensional topological semimetals come in different variants, either containing Weyl points or Dirac lines. Here we describe a more complicated momentum-space topological defect where several separate Dirac lines connect with each other, forming a momentum-space equivalent of the real-space nexus considered before for helium-3. Close to the nexus the Dirac lines exhibit a transition from type I to type II lines. We consider a general model of stacked honeycomb lattices with the symmetry of Bernal (AB) stacked graphite and show that the structural mirror symmetries in such systems protect the presence of the Dirac lines, and also naturally lead to the formation of the nexus. By the bu…

O niektórych metodologicznych i socjologicznych problemach prawa turystycznego

2019

Artykuł jest poświęcony prawniczej dyscyplinie in statu nascendi, jaką jest prawo turystyczne. Nie jest to próba kompleksowego omówienia problematyki metodologicznej i pozametodologicznej prawa turystycznego, lecz jedynie zwrócenie uwagi na niektóre z ujawnianych w dyskusji nad statusem prawa turystycznego problemów. Rozważania będą ograniczone do omówienia niektórych metodologicznych przesłanek uzasadniających celowość wyodrębnienia tej dyscypliny prawniczej oraz niektórych innych czynników podnoszonych w dyskursie o autonomizacji prawa turystycznego. W szczególności będzie podjęta próba odpowiedzi na pytania: jakie jest miejsce prawa turystycznego w systemie prawa, jak zmieniają się kieru…

Diversification in evolutionary arenas - assessment and synthesis

2019

Abstract Understanding how and why rates of evolutionary diversification vary is a central issue in evolutionary biology and ecology. The concept of adaptive radiation has attracted much interest, but is metaphorical and verbal in nature, making it difficult to quantitatively compare different evolutionary lineages or geographic regions. In addition, the causes of evolutionary stasis are relatively neglected. Here we review the central concepts in the evolutionary diversification literature and bring these together by proposing a general framework for estimating rates of diversification and quantifying their underlying dynamics, which can be applied across clades and regions and across spat…

Transnational ties: Resource or stressor on Peruvian migrants' well‐being?

2020

This paper explores the role of types and the intensity of transnational ties for migrants' well‐being from a global perspective. Based on a literature review, two competing hypotheses are formulated—transnational resources versus transnational stress—according to which transnational ties have either a positive or a negative effect on migrants' well‐being. Drawing on data from a large‐scale survey of Peruvian migrants worldwide, this paper examines the strength and direction of the relationship between Peruvian migrants' transnational ties and poor well‐being, the latter measured as depression/loneliness as a principal concern. While the multivariate regression results do not support the tr…

Memorable Experiences with Sad Music : Reasons, Reactions and Mechanisms of Three Types of Experiences

2016

Reactions to memorable experiences of sad music were studied by means of a survey administered to a convenience (N = 1577), representative (N = 445), and quota sample (N = 414). The survey explored the reasons, mechanisms, and emotions of such experiences. Memorable experiences linked with sad music typically occurred in relation to extremely familiar music, caused intense and pleasurable experiences, which were accompanied by physiological reactions and positive mood changes in about a third of the participants. A consistent structure of reasons and emotions for these experiences was identified through exploratory and confirmatory factor analyses across the samples. Three types of sadness …

Test-retest reliability of selected items of Health Behaviour in School-aged Children (HBSC) survey questionnaire in Beijing, China

2010

Abstract Background Children's health and health behaviour are essential for their development and it is important to obtain abundant and accurate information to understand young people's health and health behaviour. The Health Behaviour in School-aged Children (HBSC) study is among the first large-scale international surveys on adolescent health through self-report questionnaires. So far, more than 40 countries in Europe and North America have been involved in the HBSC study. The purpose of this study is to assess the test-retest reliability of selected items in the Chinese version of the HBSC survey questionnaire in a sample of adolescents in Beijing, China. Methods A sample of 95 male an…

Dom på overføring til tvungent psykisk helsevern : en kvalitativ studie om erfaringer og utfordringer ansatte innen psykisk helse opplever i forhold …

2016

Masteroppgave psykisk helsearbeid - Universitetet i Agder 2016 Background: The subject of this study is «Sentencing to compulsory mental health care». The choice of subject is sprung from a desire to gain a better knowledge of the challenges related to providing a good service for patients sentenced to compulsory mental health care (TPH). At the same time the study is seeking a more comprehensive understanding of the already known challenges concerning the collaboration between the first and second line services providing for this group of patients. The study's findings are discussed in light of a dialogical perspective of interaction. Selection and method: Qualitative study using participa…

Ecology of Vastedda della valle del Belìce cheeses: A review and recent findings to stabilize the traditional production

2018

The increasing request for classic foods has led to a higher demand for cheeses enjoying a “recognition of quality” status. This phenomenon has also affected Sicilian dairy products, in particular protected designation of origin (PDO) “Vastedda della valle del Belìce” (VdB), a cheese traditionally available only during the summer season, but requested year round. The variations of the microbial populations of raw milk among the seasons influence the microbiological quality of the cheeses produced. This review article reports the historical importance of cheeses and the traditional equipment used for dairy productions in Sicily with a specific focus on VdB. The microbial ecology of this chee…