| 21. |
- Arup, Ulf, et al.
(författare)
-
Professor Ingvar Kärnfelt - a birthday tribute
- 2009
-
Ingår i: The Lichenologist. - Cambridge : Cambridge University Press. - 0024-2829 .- 1096-1135. ; 41:5, s. 453-456
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- On 19 July 2009 Ingvar Kärnefelt celebrated his 65th birthday. This could have meant that we, his former students, would be celebrating him in his retirement from his position as head of the Biological Museums at Lund University. We are grateful that this is not the case, as Ingvar will carry on, probably for at least one or two more years. Instead, we celebrate Ingvar because he is the main reason for all of us having studied lichenology in Lund. This special issue of The Lichenologist is dedicated to him as a birthday tribute in honour of his long and fruitful lichenological career. The main authors of all the papers in this issue are former students of Ingvar. For several of us he has not only acted as supervisor but later also as the director of the Botanical Museum where we meet him in our daily work.
|
|
| 22. |
|
|
| 23. |
- Arup, Ulf, et al.
(författare)
-
Öländsk tegellav Psora vallesiaca på Öland och Gotland 2007
- 2008
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- SAMMANFATTNINGÖländsk tegellavPsora vallesiaca är rödlistad som akut hotad (CR). Arten var fram till2005 känd från en lokal på Öland, där den blev funnen 1970. Under 2004–2006 hittadesfyra nya lokaler på Gotland under samma period togs ett åtgärdsprogram fram för attsäkerställa artens fortlevnad i landet. I åtgärdsprogrammet föreslogs en inventering påÖland och Gotland för att försöka finna nya lokaler i landet och för att få ett bättre greppom ekologi, status och utbredning. I denna rapport redovisas resultaten av dennainventering, som utfördes 2007.Inga nya lokaler hittades på Öland och chansen att finna nya lokaler där får nu anses somsmå. På Gotland hittades fem nya lokaler, varav några med flera dellokaler. Totalt är nu tioaktuella lokaler kända i landet. På Gotland har arten noterats på sammanlagt 34 block elleravsatser och täcker nästan 900 cm2. Lokalerna är spridda på ön, i norr och öster samt längsti söder. Tre av lokalerna ligger i ett naturreservat och de andra är utan formellt skydd.Det är nu, genom de nya fynden, möjligt att beskriva artens ekologi mer i detalj. Denuppträder oftast på väl vittrade kalkstensblock, men även på avsatser. Laven skyr dock denhårda revkalkstenen som bygger upp de flesta raukar, klintar och hällmarker. Man finnerarten huvudsakligen på sidan av blocken och avsatserna, bara mer sällan på ovansidan.Lokalerna bör vara ljusa, helt öppna till halvöppna med gles buskvegetation eller spriddaträd. Under dessa förhållanden är arten oftast fertil och mår väl. Under skuggigareförhållanden mår arten sämre och är ofta steril. Ungefär samma förhållanden gäller desssläkting falsk guldskivlavPsora testacea, som dock påträffas på något hårdare, elleråtminstone inte så vittrad kalksten, men inte heller den växer på revkalksten. Bara på enlokal uppträder arterna tillsammans och intrycket är därför att om den ena arten finns på enlokal är sannolikheten inte så stor att den andra finns.Under inventeringen besöktes de allra flesta områden på Gotland som har gynnsammaförhållanden för öländsk tegellav. Dessa områden är inte speciellt många då kalkstenen påde flesta ställen är för hård och inte tillräckligt vittrad. Mörkertalet för arten bör därför,enligt vår bedömning inte vara så stort. Trots det kan det finnas oupptäckta lokaler ellerdelpopulationer.Flertalet av de aktuella lokalerna hålls mer eller mindre öppna genom bete. Igenväxning ärsåledes inte något större problem idag, men är något man på sikt måsta bevaka. En avlokalerna bör dock röjas omgående. Stenbrottsverksamhet skulle också kunna utgöra etthot mot någon av lokalerna.Uppföljningen av åtgärdsprogrammet bör nu koncentrera sig på att se till att de tio kändalokalerna har så gynnsamma förutsättningar som möjligt för öländsk tegellav. Vissövervakning bör ske, dels på de lokaler där skötselåtgärder görs, dels på några av derikligaste lokalerna.
|
|
| 24. |
- Arvidsson, Ake, et al.
(författare)
-
Fast Transport for Edge Computing in 5G Networks
- 2018
-
Ingår i: 2018 26TH INTERNATIONAL CONFERENCE ON SOFTWARE, TELECOMMUNICATIONS AND COMPUTER NETWORKS (SOFTCOM). - : IEEE. ; , s. 41-45
-
Konferensbidrag (refereegranskat)abstract
- We consider TCP performance for cloud services in 5G cellular networks and show that edge clouds offer the highest throughput, but that further improvements still are possible. To this end we devise a concept where edge clouds connected directly to the radio access network can increase their transmission rates by relying on the built in re-transmissions (through quality of service features) and on the built in user fairness (through per-user buffers and scheduler policies). We use numerical examples from measurements in real networks to demonstrate that the concept is efficient and significantly improves the effective throughput beyond what placement alone can do, and we also outline possible further improvements.
|
|
| 25. |
- Arvidsson, A., et al.
(författare)
-
Transport bottlenecks of edge computing in 5G networks
- 2019
-
Ingår i: Journal of Communication Software and Systems. - : University of Split. - 1845-6421 .- 1846-6079. ; 15:1, s. 59-65
-
Tidskriftsartikel (refereegranskat)abstract
- We consider bottlenecks of TCP throughput in scenarios with edge clouds and 5G cellular networks. By numerical examples from measurements in real networks, we show that edge clouds indeed improve throughput but that several, non-negligible bottlenecks remain. We therefore devise a concept where edge clouds connected directly to the radio access network can increase their transmission rates by relying on built in retransmissions (through quality of service features) and on the built in user fairness (through per-user buffers and scheduler policies). We then return to the numerical examples and show that our solution provides substantial gains and we conclude by identifying and discussing the remaining bottlenecks and the potential of an improved protocol.
|
|
| 26. |
- Arvidsson, Åke, 1957-, et al.
(författare)
-
Fast transport for edge computing in 5G networks
- 2018
-
Ingår i: Proceedings of 2018 26th International Conference on Software, Telecommunications and Computer Networks (SoftCOM). - New York : IEEE Communications Society. ; , s. 41-45
-
Konferensbidrag (refereegranskat)abstract
- We consider TCP performance for cloud servicesin 5G cellular networks and show that edge clouds offer the highest throughput, but that further improvements still arepossible. To this end we devise a concept where edge clouds connected directly to the radio access network can increase their transmission rates by relying on the built in re-transmissions (through quality of service features) and on the built in userfairness (through per-user buffers and scheduler policies). We use numerical examples from measurements in real networks to demonstrate that the concept is efficient and significantly improves the effective throughput beyond what placement alone can do, and we also outline possible further improvements.
|
|
| 27. |
- Baghaei, Fariba, 1964, et al.
(författare)
-
Phenotypic and genotypic characteristics of women in relation to personality traits.
- 2003
-
Ingår i: International journal of behavioral medicine. - 1070-5503. ; 10:4, s. 365-78
-
Tidskriftsartikel (refereegranskat)abstract
- The associations were examined in women between personality traits and steroid hormones, particularly androgens, as well as polymorphisms in genes regulating androgen concentration and effects. Women, all 42 years of age and premenopausal (n = 270), were recruited randomly. Conventional "masculine" and "feminine" personality traits were examined by questionnaire and set in relation to psychosocial and socioeconomic conditions, behavior in childhood, hormones, risk factors for disease, and polymorphisms in microsatellites in the CYP aromatase and the androgen receptor gene. The proportions of personality traits considered as being dominated by "masculinity" (M) or "femininity" (F) were 44.9%, respectively 15.0%, the rest consisting of a combination of M and F (33.2%) or "undifferentiated" (6.9%). M characteristics were positively associated with education, sporting, self-confidence, and good adaptation to work situation. M scores correlated with reports of "tomboyism" as girls. There was essentially no difference in hormones or disease risk factors between M and F women. The number of (CAG) repeats in the microsatellite of the transactivating domain of the androgen receptor was 19 (2.3; M and SD). M characteristics were more pronounced in the presence of longer repeat stretches (n > 20). No associations were found with F scores. There were no significant associations to the number of tetranucleotide repeats (TTTA) in the fourth introne of the aromatase gene. It was concluded that a majority of women showed M type of personality traits, associated with normal hormones, somatic health, and a long microsatellite in the transactivating domain of the AR gene.
|
|
| 28. |
- Baghaei, Fariba, 1964, et al.
(författare)
-
The CYP19 gene and associations with androgens and abdominal obesity in premenopausal women.
- 2003
-
Ingår i: Obesity research. - : Wiley. - 1071-7323. ; 11:4, s. 578-85
-
Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: Elevated androgens in women are associated with type 2 diabetes and are dependent on the conversion to estrogens by aromatase cytochrome P450. Polymorphisms of a tetranucleotide repeat [TTTA](n) in the fourth intron of the CYP19 gene are associated with endocrine-dependent diseases and were examined in relation to hormone levels and disease risk factors in premenopausal women. RESEARCH METHODS AND PROCEDURES: A population sample of women born in 1956 (n = 270) were genotyped for this polymorphism and the results set in relation to steroid hormones, including saliva cortisol, anthropometric variables, estimates of insulin, glucose and lipid metabolism, and blood pressure. RESULTS: Seven tetranucleotide repeat [TTTA](n) alleles were detected with allelic sizes of 168 to 195 bp, with a TCT deletion/insertion (168/171 bp) upstream of this microsatellite. Smoking was associated with elevated androgens (p = 0.005 to 0.019). Using the median (average stretch, 177.5 bp) as a dividing line, nonsmoking women with the shorter microsatellite had higher free testosterone (p = 0.018) and lower sex hormone binding globulin (p = 0.033). These differences were pronounced with the 168-bp allele. Such women were also characterized by a less-substantial decrease of morning cortisols ("unwinding"; p = 0.035) and central obesity (abdominal sagittal diameter, p = 0.049) and had waist/hip circumference ratios of borderline significance (p = 0.064). DISCUSSION: The results indicate that, in premenopausal women, a short microsatellite in the fourth intron of the CYP19 gene, caused by a TCT deletion upstream the [TTTA](n) tract, is associated with elevated androgens, perturbed regulation of the hypothalamic-pituitary-adrenal axis, and abdominal obesity.
|
|
| 29. |
- Baghaei, Fariba, 1964, et al.
(författare)
-
The lean woman.
- 2002
-
Ingår i: Obesity research. - : Wiley. - 1071-7323. ; 10:2, s. 115-21
-
Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: In the current obesity epidemic, the ability to remain lean is beginning to be uncommon. Therefore, it was considered of interest to characterize such subjects. RESEARCH METHODS AND PROCEDURES: From a population of premenopausal women (n = 270), all 40 years of age, those with a similar body mass index (BMI) as women at the age of 21 years, born the same year (BMI = 21.1 kg/m(2)) were selected among nonsmokers and compared with the remaining nonsmoking women. RESULTS: Lean women showed, as expected, low waist-to-hip circumference ratio and abdominal sagittal diameter as well as absence of other disease risk factors. Compared with the remaining women, 17 beta-estradiol was high and androgens were low, whereas insulin-like growth factor I and thyroid hormones showed no differences. Dihydroepiandrosterone sulfate was lower, whereas cortisol, measured in saliva repeatedly over a day, and adrenocorticotropin hormone were not different. Results from questionnaires indicated higher education and socioeconomic status, frequent sports activities, and better psychosocial adaptation and psychological health. A tetranucleotide repeat polymorphism in the fourth [corrected] intron of the aromatase P450 gene was longer among the lean (187 base pairs) than the rest of the women. Women with opposite phylogenetic characteristic have a short microsatellite (168 base pairs) in this gene locus. DISCUSSION: Lean, nonsmoking women enjoy an excellent health in not only anthropometric and metabolic factors, but also in neuroendocrine, endocrine, and psychological variables. The endocrine measurements suggest a well-functioning aromatase, which in turn might have a genetic background, contributing to health. The aromatase gene might be important for regulation of body fat mass.
|
|
| 30. |
- Bah Rösman, Jessica, 1975, et al.
(författare)
-
Further exploration of the possible influence of polymorphisms in HTR2C and 5HTT on body weight.
- 2010
-
Ingår i: Metabolism. - : Elsevier BV. - 0026-0495. ; 59:8, s. 1156-1163
-
Tidskriftsartikel (refereegranskat)abstract
- Receptors of the 5-HT2C subtype are of importance for the influence of serotonin on food intake, and 2 single nucleotide polymorphisms in this gene (HTR2C)-Cys23Ser (rs6318) and -759C>T (rs3813929)-have been reported to be associated with weight and/or antipsychotic-induced weight gain. The present study aimed to replicate these associations; in addition, the 5-HTTLPR polymorphism in the promoter region of the serotonin transporter gene (SLC6A4) was assessed. The polymorphisms were genotyped in subjects recruited from the normal population (n = 510), and possible associations between genotype and body mass index (BMI) were assessed. The Ser23 allele was more common in underweight subjects (BMI <20) than in normal- and overweight (BMI >/=20) subjects (P = .006). The T allele of the -759C/T polymorphism was less common in the overweight group (BMI >/=25) (P = .007). Homozygosity for the short allele of 5-HTTLPR was more frequent in underweight subjects (P = .015). Our results are in agreement with previous studies, suggesting polymorphisms in HTR2C to be associated with body weight, particularly in women; and they also suggest that 5-HTTLPR may influence this phenotype. Further studies on the importance of the investigated genes for eating disorders and drug-induced weight gain are warranted.
|
|
