807 research outputs found
Mais où est donc Luteva ? ou géopolitique d'une capitale improbable
Version éditeur en ligne sur le site Persée, URL : http://www.persee.fr/web/revues/home/prescript/article/ran_0557-7705_2004_num_37_1_1137National audienceAlthough well attested in ancient texts, the town of Luteva has not been well documented archaeologically. However, recent field observations present an opportunity to reanalyze systematically the corpus of data in order to study the expansion of the urbanized area and the founding of the ancient settlement. The place and role of the town are then considered within both the territory of the civitas and the province of Gallia Narbonensis. Responding to strong geopolitical forces of colonial power, the bases of which are still obscure, the town, following its promotion to the status of colonia Latina, enjoyed a long period as a capital -- a distinction consecrated by the designation of a bishop\'s see as early as the Late Roman Period.Bien attestée par les sources antiques, la ville de Luteva est pourtant mal documentée par l'archéologie. L'apport de récentes observations de terrain donne ici l'occasion de reprendre systématiquement le corpus des données pour étudier l'extension de la zone urbanisée et l'implantation de l'agglomération antique. La place et le rôle de la ville sont alors envisagés dans le territoire de la Cité et au sein de la province de Narbonnaise. Répondant à une géopolitique forte du pouvoir colonial dont les fondements demeurent cependant obscurs, la ville connaît, après son élévation au rang de colonie latine, une destinée longue de capitale que vient consacrer, dès la fin de l'Antiquité, l'accueil d'un siège épiscopal
Structures spatiales du peuplement antique de la cité de Luteva
Archaeologists and geographers have carried out a preliminary study of the Luteva city territory (Lodève, Hérault, France). From a corpus of ancient settlement ground data, they propose a description of population structure, in terms of accessibility, centrality and spatial interactions.Le territoire de la Cité de Luteva (Lodève) fait ici l'objet d'une approche commune de géographes et d'archéologues qui, à partir du corpus des données de terrain sur l'habitat antique, essayent de décrire les structures du peuplement en matière d'accessibilités, de centralités et d'interactions spatiales
Mais où est donc Luteva ? ou géopolitique d'une capitale improbable
Version éditeur en ligne sur le site Persée, URL : http://www.persee.fr/web/revues/home/prescript/article/ran_0557-7705_2004_num_37_1_1137National audienceAlthough well attested in ancient texts, the town of Luteva has not been well documented archaeologically. However, recent field observations present an opportunity to reanalyze systematically the corpus of data in order to study the expansion of the urbanized area and the founding of the ancient settlement. The place and role of the town are then considered within both the territory of the civitas and the province of Gallia Narbonensis. Responding to strong geopolitical forces of colonial power, the bases of which are still obscure, the town, following its promotion to the status of colonia Latina, enjoyed a long period as a capital -- a distinction consecrated by the designation of a bishop\'s see as early as the Late Roman Period.Bien attestée par les sources antiques, la ville de Luteva est pourtant mal documentée par l'archéologie. L'apport de récentes observations de terrain donne ici l'occasion de reprendre systématiquement le corpus des données pour étudier l'extension de la zone urbanisée et l'implantation de l'agglomération antique. La place et le rôle de la ville sont alors envisagés dans le territoire de la Cité et au sein de la province de Narbonnaise. Répondant à une géopolitique forte du pouvoir colonial dont les fondements demeurent cependant obscurs, la ville connaît, après son élévation au rang de colonie latine, une destinée longue de capitale que vient consacrer, dès la fin de l'Antiquité, l'accueil d'un siège épiscopal
#Sleepyteens: social media use in adolescence is associated with poor sleep quality, anxiety, depression and low self-esteem
This study examined how social media use related to sleep quality, self-esteem, anxiety and depression in 467 Scottish adolescents. We measured overall social media use, nighttime-specific social media use, emotional investment in social media, sleep quality, self-esteem and levels of anxiety and depression. Adolescents who used social media more – both overall and at night – and those who were more emotionally invested in social media experienced poorer sleep quality, lower self-esteem and higher levels of anxiety and depression. Nighttime-specific social media use predicted poorer sleep quality after controlling for anxiety, depression and self-esteem. These findings contribute to the growing body of evidence that social media use is related to various aspects of wellbeing in adolescents. In addition, our results indicate that nighttime-specific social media use and emotional investment in social media are two important factors that merit further investigation in relation to adolescent sleep and wellbeing
Development and Psychometric Evaluation of a New Instrument for Measuring Sleep Length and Television and Computer Habits of Swedish School-Age Children.
The aim was to develop a new instrument for measuring length of sleep as well as television and computer habits in school-age children. A questionnaire was constructed for use when children visit the school health care unit. Three aspects of the validity of the questionnaire were examined: its face validity, content validity, and construct validity. Test-retest reliability was assessed by giving the questionnaire twice, 2 weeks apart, to the respondents. The questionnaire was assessed as being reasonably valid, the test-retest results (n = 138) showing 90.4% of the estimates regarding bedtime on weeknights on the two survey occasions to lie within ± 30 min of each other, the test-retest agreement also being rather close (κ > .600) regarding both sleep and media habits. The instrument can be a valuable tool in a clinical setting, both for measuring sleep habits in a class and for discussing sleep with individual school children and their families
Sleep and Television and Computer Habits of Swedish School-Age Children
The aim of this study was to investigate sleep, television and computer habits and enjoyment and feelings of tiredness in school of school-age children and adolescents in Sweden. An instrument found to be valid and reliable here was distributed to 3,011 children aged 6, 7, 10, 14, and 16 years. Those sleeping less than the median length of time reported a significantly lower degree of enjoyment of school. Short sleep was found to be associated with having a bedroom TV, spending more than 2 hr a day at the TV or the computer, being tired in school, and having difficulties both in waking up and in sleeping. Discussing sleep and media habits with schoolchildren and their parents regarding matters of optimal sleep and of how media habits affect sleep and learning is seen to be an important task of the school health service
Knockout of Vdac1 activates hypoxia-inducible factor through reactive oxygen species generation and induces tumor growth by promoting metabolic reprogramming and inflammation
BACKGROUND:
Mitochondria are more than just the powerhouse of cells; they dictate if a cell dies or survives. Mitochondria are dynamic organelles that constantly undergo fusion and fission in response to environmental conditions. We showed previously that mitochondria of cells in a low oxygen environment (hypoxia) hyperfuse to form enlarged or highly interconnected networks with enhanced metabolic efficacy and resistance to apoptosis. Modifications to the appearance and metabolic capacity of mitochondria have been reported in cancer. However, the precise mechanisms regulating mitochondrial dynamics and metabolism in cancer are unknown. Since hypoxia plays a role in the generation of these abnormal mitochondria, we questioned if it modulates mitochondrial function. The mitochondrial outer-membrane voltage-dependent anion channel 1 (VDAC1) is at center stage in regulating metabolism and apoptosis. We demonstrated previously that VDAC1 was post-translationally C-terminal cleaved not only in various hypoxic cancer cells but also in tumor tissues of patients with lung adenocarcinomas. Cells with enlarged mitochondria and cleaved VDAC1 were also more resistant to chemotherapy-stimulated cell death than normoxic cancer cells.
RESULTS:
Transcriptome analysis of mouse embryonic fibroblasts (MEF) knocked out for Vdac1 highlighted alterations in not only cancer and inflammatory pathways but also in the activation of the hypoxia-inducible factor-1 (HIF-1) signaling pathway in normoxia. HIF-1α was stable in normoxia due to accumulation of reactive oxygen species (ROS), which decreased respiration and glycolysis and maintained basal apoptosis. However, in hypoxia, activation of extracellular signal-regulated kinase (ERK) in combination with maintenance of respiration and increased glycolysis counterbalanced the deleterious effects of enhanced ROS, thereby allowing Vdac1 (-/-) MEF to proliferate better than wild-type MEF in hypoxia. Allografts of RAS-transformed Vdac1 (-/-) MEF exhibited stabilization of both HIF-1α and HIF-2α, blood vessel destabilization, and a strong inflammatory response. Moreover, expression of Cdkn2a, a HIF-1-target and tumor suppressor gene, was markedly decreased. Consequently, RAS-transformed Vdac1 (-/-) MEF tumors grew faster than wild-type MEF tumors.
CONCLUSIONS:
Metabolic reprogramming in cancer cells may be regulated by VDAC1 through vascular destabilization and inflammation. These findings provide new perspectives into the understanding of VDAC1 in the function of mitochondria not only in cancer but also in inflammatory diseases
Sömnens Makt - Forskning om Sömnbesvär, Smärta och Hjärntumörer hos Barn, samt Intensivvård under Pandemin
Vad är omvårdnad och vad är det inte?
I juni 2025 presenterade International Council of Nurses (ICN) en ny, uppdaterad definition av både nurse och nursing. Behovet av att definiera professionen är i sig inget nytt. Redan Florence Nightingale ställde frågan ”What is Nursing and what it is not” i mitten av 1800-talet (Nightingale, 1859/2010). Sedan dess har ICN, sedan början av 1900-talet, arbetat för att skapa en globalt giltig beskrivning av sjuksköterskan och omvårdnaden (Williamson, 2023)
Hur kommer det sig att den vackraste av alla operaarior handlar om sömnlöshet?
Ingen sover -Nessun dorma. Giacomo Puccinis opera Turandot fyller fulla hus på Malmö opera våren 2024. I den avslutande akten sjunger tenoren Kalaf (i Malmö spelad av Daniel Johansson) arian där vi alla får gåshud. Men hur kan det komma sig att den vackraste av alla operaarior handlar om sömnlöshet
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