Search results for "Apse"

Adolescent use of social media and associations with sleep patterns across 18 European and North American countries

2023

Objective Over the past decade, concurrent with increasing social media use (SMU), there has been a shift toward poorer sleep among adolescents in many countries. The purpose of this study was to examine the cross-national associations between adolescent SMU and sleep patterns, by comparing 4 different categories of SMU (nonactive, active, intense, and problematic use). Design, setting, and participants Data were from 86,542 adolescents in 18 European and North American countries that participated in the 2017/18 Health Behaviour in School-aged study. Measurements Mixed-effects linear regression models were used to examine cross-national associations between 4 SMU categories and adolescent s…

The IceCube realtime alert system

2016

Following the detection of high-energy astrophysical neutrinos in 2013, their origin is still unknown. Aiming for the identification of an electromagnetic counterpart of a rapidly fading source, we have implemented a realtime analysis framework for the IceCube neutrino observatory. Several analyses selecting neutrinos of astrophysical origin are now operating in realtime at the detector site in Antarctica and are producing alerts to the community to enable rapid follow-up observations. The goal of these observations is to locate the astrophysical objects responsible for these neutrino signals. This paper highlights the infrastructure in place both at the South Pole detector site and at IceC…

Enhanced sampling in simulations of dense systems

2002

In the simulations of a variety of systems we encounter the problem of large relaxation times due to the dense packing of the systems constituents. We propose an algorithm to overcome this slowing down by temporarily allowing the constituents of a 3d systems to escape into a 4th space coordinate. The idea will be exemplified for the problem of a homopolymer collapse.

Torey Hayden: Satutettu lapsi

2020

Kirja-arvostelu teoksesta Torey Hayden: Satutettu lapsi (Lost Child) Suom. Seppo Raudaskoski Otava, 2020 nonPeerReviewed

Conflicts in Family Relations, Children's Emotions and Agency

2017

What kind of conflicts and tensions do children experience with other children and adults in the family? Content analysis of 32 thematic interviews with 10- to 13-year-old children revealed that while conflicts often concern daily actions, tasks and routines, they also relate to decision-making and fair treatment or to matters threatening the child's sense of emotional security. Parental conflicts and conflicts in child–parent relationships often arouse negative emotions that lead children to suppress their agency. However, conflicts, particularly those between siblings, may also open up possibilities for negotiation and agency.

Transcatheter edge-to-edge repair for tricuspid regurgitation in Barlow-type tricuspid valve prolapse

2020

Vauvapalstat verkkoyhteisöinä ja yhteisöllisyyden muodostajina

2010

Tässä pro gradu -tutkielmassa tutustutaan pienten lasten vanhemmille suunnattuihin keskustelupalstoihin ja siihen millaisia verkkoyhteisöjä ne ovat. Lisäksi selvitettiin, saavatko keskusteluihin osallistujat niistä yhteisöllisyyden tunteita. Aihe valittiin yleisen kiinnostuksen lisäksi siksi, että se koettiin ajankohtaiseksi ja tärkeäksi sekä Suomessa, tästä näkökulmasta, vähän tutkituksi. Yhteiskunnan muuttuessa keskustelupalstat ovat osoittautuneet merkittäviksi kommunikointivälineiksi ja mielipiteidenvaihtokanaviksi ja monet ihmiset etsivät enenevissä määrin itselleen seuraa verkosta. Näin ollen keskustelupalstat ovat suuressa roolissa yhteisöllisyyden muodostajina. Tämä luo myös keskust…

Latvijas ūdeņu vides pētījumi un aizsardzība: Referātu tēžu krājums

2016

Dark gamma-ray bursts

2016

Many theories of dark matter (DM) predict that DM particles can be captured by stars via scattering on ordinary matter. They subsequently condense into a DM core close to the center of the star and eventually annihilate. In this work, we trace DM capture and annihilation rates throughout the life of a massive star and show that this evolution culminates in an intense annihilation burst coincident with the death of the star in a core collapse supernova. The reason is that, along with the stellar interior, also its DM core heats up and contracts, so that the DM density increases rapidly during the final stages of stellar evolution. We argue that, counterintuitively, the annihilation burst is …

Magnetorotational Instability in Core-Collapse Supernovae

2017

We discuss the relevance of the magnetorotational instability (MRI) in core-collapse supernovae (CCSNe). Our recent numerical studies show that in CCSNe, the MRI is terminated by parasitic instabilities of the Kelvin-Helmholtz type. To determine whether the MRI can amplify initially weak magnetic fields to dynamically relevant strengths in CCSNe, we performed three-dimensional simulations of a region close to the surface of a differentially rotating proto-neutron star in non-ideal magnetohydrodynamics with two different numerical codes. We find that under the conditions prevailing in proto-neutron stars, the MRI can amplify the magnetic field by (only) one order of magnitude. This severely …