Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailSuffering as an independent component of the experience of pain
Bustan, Smadar UL; Gonzalez-Roldan, Ana; Kamping, Sandra et al

in European Journal of Pain (2015)

Detailed reference viewed: 126 (8 UL)
Full Text
See detailSUGAC: Sofia University GNSS Analysis Center
Simeonov, Tzvetan; Sidorov, Dmitry UL; Teferle, Felix Norman UL et al

Poster (2014, June 25)

The Sofia University GNSS Analysis Centre (SUGAC, suada.phys.uni-sofia.bg) is a new analysis centre established via collaboration between the Department of Meteorology and Geophysics of Sofia University ... [more ▼]

The Sofia University GNSS Analysis Centre (SUGAC, suada.phys.uni-sofia.bg) is a new analysis centre established via collaboration between the Department of Meteorology and Geophysics of Sofia University, the IPOS - BuliPOS GNSS network in Bulgaria and the University of Luxembourg. In April 2014, the first processing campaign took place. One year GNSS data from 7 stations of the BuliPOS network are processed in collaboration with the University of Luxembourg. Tropospheric products (Zenith Total Delay and gradients) with 5 min temporal resolution are obtained using the NAPEOS software, developed by ESA. The tropospheric products from this campaign will be used for validation of the Weather Research and Forecasting (WRF) model as well as for case studies during intense precipitation events and fog. In this work the WRF model validation for Bulgaria will be presented. Future work will be the establishment of autonomous near real-time processing of the regional ground-based GNSS network in Southeast Europe in support of the EUMETNET E-GVAP and COST ES1206 ”Advanced Global Navigation Satellite Systems for Severe Weather Events and Climate” projects. [less ▲]

Detailed reference viewed: 102 (0 UL)
Peer Reviewed
See detailSugawara construction and Casimir operators for Krichever-Novikov algebras
Schlichenmaier, Martin UL; Sheinman, Oleg K.

in Journal of Mathematical Sciences (1998), 92(2), 3807-3834

Detailed reference viewed: 63 (1 UL)
Peer Reviewed
See detailSugawara operators for higher genus Riemann surfaces
Schlichenmaier, Martin UL

in Reports on Mathematical Physics (1999), 43

Detailed reference viewed: 36 (2 UL)
See detailSuggestions for Better Integrating ICT Enhanced Instructional Approaches Into Campus-Based Higher Education
Molz, Markus UL; Eckhardt, Antje; Schnotz, Wolfgang

in The new educational benefits of ICT in higher education : proceedings (2002)

Detailed reference viewed: 42 (0 UL)
See detailSuggestions to Solve or Exacerbate Gender Equality Problems
Samuk, Sahizer UL; Tafolar, Mine

Article for general public (2013)

Detailed reference viewed: 25 (0 UL)
Full Text
See detailSuicidal Behaviour in Youth in Luxembourg - Findings from the HBSC 2014 Luxembourg Study
Catunda, Carolina UL; van Duin, Claire UL; Heinz, Andreas UL et al

Report (2020)

Suicide is one of the leading causes of death among young people worldwide. In order to prevent suicides, early identification of groups at risk is needed. In the Luxembourgish HBSC study, data on ... [more ▼]

Suicide is one of the leading causes of death among young people worldwide. In order to prevent suicides, early identification of groups at risk is needed. In the Luxembourgish HBSC study, data on suicidal behaviours among adolescents were collected in 2006, 2010 and 2014. These can be used to identify suicide risk factors and to develop comprehensive suicide prevention programs. In Luxembourg, the suicide rate has fluctuated around 15 deaths per 100 000 inhabitants per year, for more than ten years. In the period 2006 – 2016, 20 deaths were registered as suicide in the age group of 10 to 19-year-olds. These suicides represent approximately 19% of all deaths registered in this age group. In the Luxembourgish HBSC study conducted in 2014, 875 adolescents indicated to have contemplated suicide in the last 12 months, which amounts to 15.1% of the adolescents in the study. In the same year, 811 adolescents (14.0%) indicated to have made a suicide plan in the last 12 months, and 448 adolescents (7.7%) to have attempted suicide (at least once) in the last year. In first instance, bivariate logistic regressions analyses were conducted for 24 independent variables with three suicidal behaviours (contemplation of suicide, planning of suicide and suicide attempt) and sadness as dependent variables in order to identify potential risk factors. These risk factors were further tested in multivariate logistic regressions, in order to make a statement about the relevance of these factors for suicidal behaviour of adolescents in Luxembourg, while taking into account the dependence between the risk factors. Results from multivariate logistic regressions indicate that subjective health complaints are the most important risk factor for suicidal behaviour. Adolescents who have recurrent multiple health complaints are at higher risk for suicidal behaviour than adolescents who do not have health complaints. Life satisfaction is the second most important risk factor for suicidal behaviour. Adolescents with lower levels of life satisfaction are at higher risk for suicidal behaviour than adolescents who have higher levels of life satisfaction. Gender-specific analyses show that the risk factors differ between girls and boys for suicidal behaviour. [less ▲]

Detailed reference viewed: 99 (9 UL)
Peer Reviewed
See detailSuicidal Ideation – Trends and risk groups in Luxembourg
van Duin, Claire UL; Catunda, Carolina UL; Heinz, Andreas UL et al

Scientific Conference (2018)

Background: Suicide is a main cause of death among young people worldwide and adolescence is the period with the highest risk of developing suicidal ideation. Objective(s): Trends of suicidal ideation ... [more ▼]

Background: Suicide is a main cause of death among young people worldwide and adolescence is the period with the highest risk of developing suicidal ideation. Objective(s): Trends of suicidal ideation over time and identification of groups at risk in Luxembourg. Method: Secondary school students were asked the questions from the Optional Package “Suicidal ideation and behaviour” in the Luxembourgish HBSC survey 2006 (N = 6581), 2010 (N = 7192), and 2014 (N = 5599). Data were analysed using SPSS complex samples and logistic regressions. Results: 15.9% of the students considered suicide in 2006, 12.7% in 2010 and 15.2% in 2014. Girls were more likely to consider suicide than boys. Family affluence, family structure, schooltype, age, bullying and other variables predicted suicidal ideation and behaviour, too. Conclusions: Despite a decrease of considered suicide in 2010, suicidal ideation and behaviour did not change between 2006 and 2014. Thus, prevention programmes are important. [less ▲]

Detailed reference viewed: 61 (8 UL)
Full Text
Peer Reviewed
See detailSuicidality in adults with autism spectrum disorder: The role of depression and alexithymia.
Pinto Costa, Andreia UL; Loor, Cathia; Steffgen, Georges UL

Scientific Conference (2019)

Background: Individuals with autism spectrum disorder (ASD) have a higher risk of depression and suicidality than individuals without ASD. Alexithymia, a personality construct characterized by a lack of ... [more ▼]

Background: Individuals with autism spectrum disorder (ASD) have a higher risk of depression and suicidality than individuals without ASD. Alexithymia, a personality construct characterized by a lack of emotional awareness, that is highly linked to depression, is also more prevalent among people with ASD than in the general population. Few studies have so far examined the increased risk of suicidality in people with ASD and none have looked into how alexithymia could be a significant risk factor for suicidality in ASD. Objectives: The aim of the present study is to explore more closely the relationship between alexithymia, depression, and suicidality in ASD. It is hypothesized that there are higher rates of depression, suicidality, and alexithymia in people with ASD compared to neurotypical adults. Because the risk of suicidality can be explained by high levels of depression and alexithymia in the general population, this is also hypothesized for the group of people with ASD. Methods: In the present study, 53 adults diagnosed with ASD and a control group of 132 adults without ASD were compared on their self-reported scores on autistic traits (AQ-short), depression (CES-D), suicidality (SBQ-R), and alexithymia (TAS-20). Participants were aged between 18 and 60 years. The ASD group was significantly older (M = 33.75; SD = 11.02) than the control group (M = 29.08; SD = 8.74), t(183) = -3.04, p < .01 and there were significantly more men than women in the ASD group (21 men, 31 women, 1 other) than in the control group (31 men, 101 women), χ2(2) = 7.72, p < .05. Results: The results revealed that the ASD group had significantly higher levels of autistic traits [F(1, 181) = 394.61, p < .001, ɳp2 = .69], depression [F(1, 181) = 51.86, p < .001, ɳp2 = .22], suicidality [F(1, 181) = 71.51, p < .001, ɳp2 = .28], and alexithymia [F(1,181) = 143.44, p < .001, ɳp2 = .44] than the control group. A hierarchical linear regression analysis including age, gender, autistic traits, depressive symptomatology, and alexithymia also revealed that the severity of autistic traits and depressive symptomatology were significant predictors of suicidality (autistic traits: β = 1.24, p <.001; depression: β = 1.30, p <.001). Furthermore, alexithymia played a moderating role in the relation between autistic traits and suicidality: a significant relation was found between autistic traits and suicidality on participants with high levels of alexithymia [b = 1.61, SE = 0.31, p < .001], but autistic traits were not related to suicidality on participants with low levels of alexithymia [b = -0.54, SE = .45, p = .24]. Conclusions: The present results show that individuals with ASD are vulnerable to suicidal ideation and that the severity of autistic traits, depression, and alexithymia are important factors in the occurrence of suicidal ideation in ASD. Because of the high risk of suicidality in ASD, interventions that take into consideration depression, and particularly alexithymia, could potentially benefit people with ASD. [less ▲]

Detailed reference viewed: 31 (1 UL)
Full Text
Peer Reviewed
See detailSuicidality in adults with autism spectrum disorder: The role of depressive symptomatology, alexithymia, and antidepressants.
Pinto Costa, Andreia UL; Loor, Cathia; Steffgen, Georges UL

in Journal of Autism and Developmental Disorders (2020)

People with autism spectrum disorder (ASD) have an increased risk of suicidality. However, the risk factors remain under-investigated. This study explored factors that increase suicidality risk in ASD ... [more ▼]

People with autism spectrum disorder (ASD) have an increased risk of suicidality. However, the risk factors remain under-investigated. This study explored factors that increase suicidality risk in ASD. Through an online survey, 150 adults with ASD were compared to 189 control adults. Autistic traits, depressive symptomatology, alexithymia, and antidepressant intake were assessed on their contribution predicting suicidality. Among people with ASD, 63% scored above the cutoff for high suicidality risk. Increased autistic traits, depressive symptomatology, and antidepressant intake significantly predicted suicidality. Furthermore, among those with high levels of autistic traits, the risk of suicidality was increased if they also had high levels of alexithymia. These results highlight the importance of considering depression, antidepressants, and alexithymia to prevent suicidality in ASD. [less ▲]

Detailed reference viewed: 81 (6 UL)
Full Text
Peer Reviewed
See detailSuicide attempts prior to fatal drug overdose in Luxembourg from 1994 to 2011
Origer, Alain UL; Baumann, Michèle UL

in Moussaoui, Driss; Figueira, Maria Luisa (Eds.) The bio-psycho-social model: The future of psychiatry. (2013)

Educational Objectives: This study may help participants to recognize factors influencing suicidal behavior that should be assessed or monitored in the context of substance use. Purpose: To assess the ... [more ▼]

Educational Objectives: This study may help participants to recognize factors influencing suicidal behavior that should be assessed or monitored in the context of substance use. Purpose: To assess the prevalence of lifetime suicide attempts in opiate and cocaine related (FOD) cases. To analyze associations between suicide attempts and socio-demographic, life and substance use profiles of FOD victims . Methods: A triangulation approach allowed to cross-examining data from national law enforcement sources, the national drug use surveillance system (RELIS) and of forensic and toxicological evidence. Bivariate statistical analysis was performed by means of Chi-square χ² tests as well as logistic regression analysis of the association between suicide attempts and selected variables. Results: Prior to death, 16.8% of FOD victims reported a single suicide attempt, 37% multiple attempts and 46.2% declared none. No associations were found between suicide attempts and the following variables: sex, age, nationality, penal past (including prison stays), educational, occupational status and income of victims, occupational status of parents and detection of psychotropic prescription drugs in post mortem toxicological analysis. After adjustment for sex and age, FOD victims who showed one or more lifetime suicide attempts were more likely to have experienced non-fatal overdoses [AOR = 5.755 (95% CI 1.633 – 20.278), and (licit or illicit) substance abuse of one or both parents [AOR = 2.859 (95% CI 1.250 – 6.539), p=0.013]. The greater likelihood of unmarried FOD victims to witness suicide attempts (χ²:4.573; p=0.032), compared with married decedents, was no longer observed after sex-age adjustment. Conclusion: Suicide attempts are frequent in fatal drug overdose victims and a strong association has been observed between the former and the frequency of non-fatal overdoses experienced by decedents included in our sample. Family contexts may be at stake when it comes to explain the likelihood of suicide attempts in victims of fatal drug overdose. The fact that substance abuse in parents was positively linked to suicide attempts in FOD victims suggest that increased attention should be paid to family histories in the prevention of drug overdoses and suicide, and the link between both. Our findings could inspire further research, building upon bigger study samples and prospective cohort designs, allowing to collecting more in-depth data on the social and family support experienced by FOD victims. [less ▲]

Detailed reference viewed: 106 (6 UL)
Full Text
Peer Reviewed
See detailSuicide behaviors and role of family characteristics, school difficulties, unhealthy behaviors, and mental health among multi-cultural students.
Baumann, Michèle UL; Chau, Kénora

in Psychosociological Work in Transcultural Contexts (2012)

Background: School is a multi-cultural setting where students are trained for community participation, especially at adulthood. But some students experience suicidal behaviors and the risk may be ... [more ▼]

Background: School is a multi-cultural setting where students are trained for community participation, especially at adulthood. But some students experience suicidal behaviors and the risk may be exacerbated among immigrant students because of their living conditions. In an early adolescence context, this study assessed of risk for suicide behaviors among European and non-European immigrants and the roles of family characteristics, school difficulties, unhealthy behaviors, and mental health. Methods: Questionnaires were completed by 1559 middle-school adolescents from north-eastern France (mean age 13.5 (SD 1.3) years) including: sex, age, family structure, nationality, father’s occupation, unhealthy behaviors (last-30-day consumption of tobacco/alcohol/cannabis/hard drug, no regular sports/physical activities), repeating a school year, low-school-performance (<10/20), and quittingschool- thinking, depressive symptoms, victim of violence or sexual abuse, implication in violence, and suicide behaviors. Data were analyzed using logistic models. Results: Last-12-month suicidal ideation (SI) and lifetime suicide attempts (SA) affected 11.7% and 9.9% of students. The risk for SI was higher for European immigrants (gender-age-adjusted odds ratio ORa 2.06) and non-European immigrants (2.60) compared with French. Further adjustment for father’s occupation and family structure reduced the ORs to 1.76 (28%) and 2.43 (11%) respectively. Further adjustment for unhealthy behaviors, school difficulties, depressive symptoms, victim of violence or sexual abuse, and implication in violence reduced the ORs to 1.50 (53%) and 2.23 (23%) respectively. The risk for SA was higher for European immigrants only (ORa 2.21). Further adjustment for father’s occupation and family structure reduced the OR to 2.03 (15%), and further adjustment for other covariates reduced it to 1.59 (51%). Conclusion: Immigrant students have a higher risk for suicidal ideation or suicide attempts depending on their origin. The risk is strongly mediated by family characteristics, school difficulties, unhealthy behaviors, and mental heath. Public policy may focus on these issues. This should promote school achievement and community participation. [less ▲]

Detailed reference viewed: 96 (7 UL)
Peer Reviewed
See detailSuicide Prevention in Luxembourg: Using the HBSC Symptom Checklist as an Alternative Tool for Screening
Catunda, Carolina UL; van Duin, Claire UL; Heinz, Andreas UL et al

Poster (2018, December 07)

Introduction: Suicide is one of the leading causes of death of young people and as such, screening for suicidal ideation is a major public health concern. However, there is fear that exposure to suicide ... [more ▼]

Introduction: Suicide is one of the leading causes of death of young people and as such, screening for suicidal ideation is a major public health concern. However, there is fear that exposure to suicide-related content would encourage suicide attempt. This false idea is a great barrier to effectively screen. Hence, the need for tools without suicide content. Purpose: The goal of this study is to present a short tool that could be helpful for suicide screening and prevention. Materials and Methods: This study is based on the 2014 HBSC Luxembourg survey. A total of 5595 students aged from 12 to 18 years old in secondary school responded to a questionnaire translated to both French and German. Among others, it included the HBSC Symptom Checklist, a scale developed to measure eight health complaints (headache, abdominal pain, backache, feeling low, irritability, feeling nervous, sleeping difficulties and dizziness), as well as 4 questions asked in a logical sequence concerning sadness, suicide ideation, suicide planning and suicide attempt. Results: Multivariate Logistic Regression analyses with 24 potential indicators showed the number of health complaints as the most predictive indicator for suicide attempt (OR=1.248; C.I.: 1.175-1.325). Following, a significant ROC curve (area under the curve of 0.76; sensitivity=0.68 and specificity=0.73) and Youden Index (0.41) indicates the optimum cut-off at three complaints, with a predictive value of 17%. An alternative cut off point at four (sensitivity=0.57 and specificity=0.82; Youden Index of 0.39) has a predictive value of 21%. Conclusion: The HBSC Symptom Checklist seems to be a good predictor as each additional health complaint increases the risk of suicide attempt by 25%. In addition, it could be an alternative to traditional suicide screening measures, as its sensitivity, specificity and predictive values are similar to measures more commonly used, such as the Columbia Suicide Screen or the Beck Depression Inventory. Further work should be invested to validate the HBSC Symptom Checklist as a screening tool for suicide prevention. [less ▲]

Detailed reference viewed: 107 (13 UL)
Full Text
Peer Reviewed
See detailSuicide Prevention: Using the Number of Health Complaints as an Indirect Alternative for Screening Suicidal Adolescents
Heinz, Andreas UL; Catunda, Carolina UL; van Duin, Claire UL et al

in Journal of Affective Disorders (2020), 260

Background: Suicide is the second leading cause of death in adolescents. Screening for persons at risk usually includes asking about suicidal ideation, which is considered inappropriate in some societies ... [more ▼]

Background: Suicide is the second leading cause of death in adolescents. Screening for persons at risk usually includes asking about suicidal ideation, which is considered inappropriate in some societies and situations. To avoid directly addressing suicide, this paper investigates whether the Health Behaviour in School-aged Children Symptom Checklist (HBSC-SCL), a validated non-clinical measure of eight subjective health complaints (e.g. headache, feeling low), could be used as a tool for screening suicidal ideation and behavior in adolescents. Methods: 5262 secondary school students aged 12-18 answered the Luxembourgish HBSC 2014 survey, including the HBSC-SCL items and suicidal ideation and behavior questions. Results: Each HBSC-SCL item correlates with suicidal ideation and behavior. A sum score was calculated ranging from zero to eight health complaints to predict respondents who considered suicide (area under the ROC curve = .770). The ideal cut-off for screening students who consider suicide is three or more health complaints: sensitivity is 66.3%, specificity is 75.9% and positive predictive value is 32.9%. Limitations: One limitation is HBSC-SCL's low positive predictive value. This is a general problem of screening rare events: the lower the prevalence, the lower the positive predictive value. Sensitivity and specificity could be improved by taking age-, gender- and country-specific cut-off values, but such refinements would make the score calculation more complicated. Conclusions: The HBSC-SCL is short, easy to use, with satisfactory screening properties. The checklist can be used when suicide cannot be addressed directly, and also in a more general context, e.g. by school nurses when screening adolescents. [less ▲]

Detailed reference viewed: 197 (32 UL)
Full Text
Peer Reviewed
See detailSuitability of visual modelling languages for modelling tangible user interface applications
Tobias, Eric; Ras, Eric; Amalio, Nuno UL

in Visual Languages and Human-Centric Computing (VL/HCC) (2012)

This paper compares the suitability of visual modelling languages for describing tangible user interface (TUI) applications. After gathering different approaches, we have selected three languages for our ... [more ▼]

This paper compares the suitability of visual modelling languages for describing tangible user interface (TUI) applications. After gathering different approaches, we have selected three languages for our comparative study: the visual object constraint language (VOCL), augmented constraint diagrams (ACD), and the visual contract language (VCL). A weighted evaluation based on multiple quality criteria led to the conclusion that VCL is best suited to model TUI applications [less ▲]

Detailed reference viewed: 151 (0 UL)
Full Text
Peer Reviewed
See detailSulfolobus Systems Biology: Cool hot design for metabolic pathways
Kouril, T.; Kolodkin, Alexey UL; Zaparty, M. et al

in Systems Biology of Microorganisms (2012)

Life at high temperature challenges the stability of macromolecules and cellular components, but also the stability of metabolites, which has received little attention. For the cell, the thermal ... [more ▼]

Life at high temperature challenges the stability of macromolecules and cellular components, but also the stability of metabolites, which has received little attention. For the cell, the thermal instability of metabolites means it has to deal with the loss of free energy and carbon, or in more extremes, it might result in the accumulation of dead-end compounds. In order to elucidate the requirements and principles of metabolism at high temperature, we used a comparative blueprint modelling approach of the lower part of the glycolysis cycle. The conversion of glyceraldehyde 3-phosphate to pyruvate from the thermoacidophilic Crenarchaeon Sulfolobus solfataricus P2 (optimal growth-temperature 80ºC) was modelled based on the available blueprint model of the eukaryotic model organism Saccharomyces cerevisiae (optimal growth-temperature of 30ºC). In S. solfataricus only one reaction is different, namely glyceraldehyde-3-phosphate is directly converted into 3-phosphoglycerate by the non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase, omitting the extremely heat-instable 1,3-bisphosphoglycerate. By taking the temperature dependent non-enzymatic (spontaneous) degradation of 1,3-bisphosphoglycerate in account, modelling reveals that a hot lifestyle requires a cool design. [less ▲]

Detailed reference viewed: 114 (24 UL)